KR20090019079A - Generation control system of a tidal power station and method controlling thereof - Google Patents

Abstract

A system and a method thereof for controlling the optimum power simulation operation of a tidal power station for performing the optimum power generation are provided to minimize time for predicting the optimization according to a change of a power generation operating time(initiation and termination) and a power generation consumption amount. A measuring instrument unit measures a tide level and transmits measured tide level information. An optimum model simulation unit simulates the optimum power generation to determine the power generation initiation and finish time and outputs the prediction seawall level information of that time. A main monitoring control system compares and outputs information about the prediction seawall level with information about the measured prediction seawall. The optimum model simulation unit differentiates a change of the minimum power generation operating time and the power generation consumption amount according to a specified range. A range having the maximum power generation amount and the minimum power generation operating time is predicted in the specified range.

Description

Generation control system of tidal power plant and its method {Generation control system of a tidal power station and method controlling}

The present invention relates to an optimal power generation simulation operation control system and a method of tidal power plant, and in particular, as an integrated management technology of the system, an optimal power generation simulation operation control system for tidal power plants for performing optimal power generation by integrating real-time data and predictive data; It's about how.

In general, a power generator that generates electricity using coal, oil, or nuclear power is typically a thermal power plant, a hydroelectric generator, and a nuclear power plant.

Thermal power plants use fossil fuels, which not only deplete fossil fuel resources, but also cause serious damage to the environment due to pollution, and hydroelectric power plants must submerge large areas. There is a problem that causes damage to the natural ecosystem. In addition, the nuclear power plant has a problem in safety due to the use of nuclear fuel, and is contaminated with the environment by the waste and pollutants of nuclear power generated in the power generation process has emerged as a serious threat to life.

In order to solve such a problem, there are natural power generators such as solar power generators, wind power generators using wind power, and tidal power generators using only the difference between tides in the ocean.

The west coast of Korea has favorable conditions for tidal power generation, and began to examine feasibility of tidal power plant for Incheon sea area in 1929 when the governor-general government began. In recent years, Sihwa tidal power plant is under construction in Sihwa Lake, and eco-friendly energy development under the Taoist Protocol As part of this project, feasibility and detailed design have been achieved through active promotion of tidal power projects such as Incheon Bay and Garorim Bay.

Tidal power generation is a power generation method that produces energy by using sea level and George water level difference caused by rising and falling sea level. Unlike hydropower, tidal power generation assumes that there is no restriction on the amount of power used for seawater generation, but it is subject to artificially low George's facilities. In general, power generation falls by using tidal tide and George's water level difference that occurs twice a day, and maximizes the production of power generation by efficiently managing the continuous low water management of George filled and drained. The tidal power generation operation simulates a tidal power generation model that maximizes the amount of power generated by considering tidal size, tidal and water level, inflow and wave changes in each tidal cycle, and starts and stops power generation using optimal results. The problem of deciding this problem is very difficult because of the optimal design of the system that takes into account several variables. To date, the optimal start and stop methods have been applied to tidal power plants by optimization, arithmetic, reference model, and dynamic planning.

The development theory of tidal power plant is the same as that of hydropower, but there are many differences in system configuration. In particular, large-scale tidal thrombstones are formed with artificial tides to carry out tidal power generation by supplementing and draining the tidal currents due to tidal tides. Tidal and tidal currents can be predicted, and there is a problem in that it is necessary to operate with the goal of maximizing tidal power generation per tidal phase in terms of efficient use of George's water storage.

Recently, the rapid development of computer and data communication system is caused by the decrease of H / W price of computer, and supervisory control and data acquisition (SCADA) system is introduced in large-scale systems of power system, hydro power plant and tidal power plant, energy management, power generation operation plan, Facility monitoring control and data logging are performed, and system optimal operation calculation of the plant using computer operation function and database is performed. Optimal decision support is performed, but facility monitoring and control system is operated in real time at about 1 second intervals. The decision support problem by the optimal operation calculation is about 15 seconds of computation time and it is very difficult to synchronize the time synchronization between the two systems. So far, the two systems are on-line and off-line. Line) system is operated separately.

 Tidal power operation is divided into single-flow and double-flow generation according to the number of tides. In the feasibility study of tidal power plant branch on the west coast of Korea, a single-flow power plant is mainly used. The power generation operation method of Sihwa tidal power plant, which is being constructed for the first time in Korea, uses a single-flow and creative method.

The creative development method is a method of developing at the time of creation by lowering the George's water level to low tide level by opening the hydrology and aberration at the time of fall, and the cycle of development standby → development → drainage waiting → drainage is repeated. In the generation mode, the generator generates a continuous generator from the time of occurrence of the optimum power generation head to the aberration generator. In the drainage mode, the water level is opened from the time when the internal water level and the outer tide are the same at the time of fall, and the water level is the same at the time of the next creation. We plan to increase. 1 shows a tidal cycle.

In FIG. 1, the tide level and the reservoir level for one tidal phase are shown, and the drop for power generation uses the tide level and the water level difference. Determination of the optimum start water head difference at the start of power generation and the minimum power generation head difference at the end of power generation predicts tidal and tide changes under the facility constraints of tidal power plants, and takes into account the parameters of the water level change and turbine characteristics. This is a difficult problem because it is necessary to calculate it, and the optimal simulation should be designed as an important variable that affects the increase and decrease of the generation of turbines for the maximum output of tides.

The development theory of tidal power generation is the same as the theory of hydropower generation, while hydropower generation increases or decreases the quantity of power used, but tidal power generation increases or decreases. Therefore, tidal power is a function of power generation fall (H), which is the difference between the outer tide level and George's reservoir level, and the quantity of water used (Q) passed through the water turbine, and the turbine efficiency and the generator according to the manufacturer's production chart (Hill Chart) The equation applying the efficiency is as follows.

: 수차효율(%),

: 발전기효율(%)Where E is the amount of power generated (kW), Q is the amount of turbine use (m ³ / sec), H is the level difference between the tide and -George (m),

: Aberration efficiency (%),

Generator efficiency (%)

Input data for power generation calculation include tidal data, surface area by water level, number of aberration generators and floodgates, flow rate characteristics of aberration generators and floodgates, aberration generator characteristic coefficients, and head and power generation and head and passage flow relations of aberration generators Etc. are required.

The results of power generation calculation are calculated tides, tide time for start and end of tides, tide forecasting time at the start and end of power generation, external tide at the start and end of power generation, tide level, tide head which is difference between tide level and tide level, Outputs the results of tidal power generation, power generation nougat, power generation usage by power generation time, water aberration and hydrologic drainage by time of drainage.

The calculation of tidal power generation is an expression of the continuity of the process of the tidal power generation operation method and shows the power generation method in the generation of forged land of power generation atmosphere → power generation → drainage atmosphere → drainage according to the tidal and tidal sizes as shown in FIG. 2. The tide level that determines the generation fall is given the determined forecast value.

In addition, an example of the technique related to such tidal power generation is disclosed in Documents 1 and 2 below.

[Document 1] Korean Patent Patent Publication No. 2007-0061488 (published on June 13, 2007)

[Patent 2] Korean Patent Patent Publication No. 2007-0023186 (published Feb. 28, 2007)

However, in the conventional technology as described above, there is a problem in that the generation control system takes longer to process the prediction in estimating the maximum power generation condition of the tidal power plant using prediction data based on the tide information.

An object of the present invention is to solve the problems described above, and to predict the optimization according to the change in the power generation run time (start and end) and the amount of power used in order to calculate the maximum power generation conditions from the past tide information It is to provide an operation control system and method for an optimal power generation simulation of tidal power plants that can minimize the time required for the operation.

In order to achieve the above object, the optimal power generation simulation operation control system of the tidal power plant according to the present invention is a system for controlling the optimal power generation of the tidal power plant on the basis of real-time data, and a measurement device unit for measuring the tide level and transmitting measured tide information. And receiving the tide information from the measuring device unit, simulating and operating the optimal power generation for the purpose of producing the minimum power generation time and the maximum power generation during the tidal start and end periods to determine the start and end time of the power generation, and then predict George The power generation start and end by determining the power generation start and end time by receiving the information on the level of the George level from the optimum model simulation unit and the measurement device unit for outputting the water level information, and receiving the predicted level of the George water level from the optimum model simulation unit Command and control and control various facilities of the tidal power plant And a main monitoring and control system for comparing and outputting the information on the predicted George level and the information on the measured George level, wherein the optimum model simulation unit has a range of changes in the minimum generation uptime and the quantity of power used. It is characterized by differentiating and predicting a range having the maximum generation amount and the minimum generation operating time among the predetermined ranges.

In addition, in the optimal power generation simulation operation control system of the tidal power plant according to the present invention, the optimum model simulation unit is a water level database unit for storing a predetermined period of information of the water level information input from the measuring device unit, the water level database And an optimal power generation simulation unit for predicting the maximum power generation start and end possible George level by the George water level predicted by the George water level predictor, and predicting the George water level by the information stored in the unit. The power generation simulation unit repeatedly executes the derivatives for each predetermined range, and predicts a range having a maximum power generation amount and a minimum power generation operating time.

In addition, in the optimal power generation simulation operation control system of the tidal power plant according to the present invention, the level of the george is predicted by the data calculated from the tide information and the constraints of the george, the predicted george level information is generated, the number It is characterized by being the standard for George's operations such as opening and closing of doors.

In addition, in order to achieve the above object, the optimal power generation simulation operation control method of the tidal power plant according to the present invention differentiates the change in power generation operation time and the quantity of use of power by a certain range, and predicts a range having the maximum generation amount from the predetermined range. Prediction step, repetition prediction step of re-differentiating the range predicted in the prediction step to narrow down the range having the maximum generation amount and minimum generation operating time, and repeatedly predicting to the required range from the actual operation, the maximum generation amount and minimum predicted in the iteration prediction step Determining the power generation operating time, and determining the tidal power in the case where the maximum power generation amount and the minimum power generation operating time are the power generation start and end george levels.

In the optimal power generation simulation operation control method of the tidal power plant according to the present invention, the step of measuring the sea tide in order to obtain real-time data as the facility constraint conditions of the power plant, the real-time data to obtain the tide data for each predetermined period in the past The method may further include storing the data, and the predicting step may predict the level of the tide level from the previous tide data stored in the storing step and predict the differential level to generate power.

As described above, according to the optimal power generation simulation operation control system and the method of the tidal power plant according to the present invention, the maximum power generation amount and the minimum power generation operating time prediction processing time of the power generation control system by the method of repeatedly predicting the actual operation to the required range The effect that can be minimized is obtained.

The above and other objects and novel features of the present invention will become more apparent from the description of the specification and the accompanying drawings.

EMBODIMENT OF THE INVENTION Hereinafter, the structure of this invention is demonstrated according to drawing.

First, the concept of the present invention will be described.

In the present invention, real-time facility status monitoring and control function using the supervisory control and data acquisition system of SCADA system and the decision support problem based on the system optimal operation calculation result using the computational function of the computer are hierarchical of SCADA system. To present the time synchronization method of the interrupter method using the time difference to integrate the real-time monitoring / control and decision support to be operated in the structure, and to produce the maximum tidal power generation for each tidal stone at the predicted tidal level. This paper presents an optimization method to determine the optimal start and stop times for performing tidal power generation simulation and performing start and stop commands of tidal generators.

In the optimal operation plan of tidal power plant according to the present invention, two-layer structure of measurement control is designed to implement tidal prediction and maximum generation of tidal power generation in SCADA and design time synchronization method of interrupter method using time difference of real-time measurement and simulation. In order to be applied in SCADA system, it was designed in two-layer structure divided into upper and lower layers to automatically control power generation model calculation and power plant start stop command.

In order to verify the usefulness of the present invention, the calculation results were presented using the specifications of Sihwaho tidal power plant currently under construction. It is hoped that the generator start and stop by the measurement control and optimal operation simulation of the SCADA of the optimal operation plan of the tidal power plant proposed in the present invention will be actively applied as the basic model of the introduction of the SCADA system, and the accuracy and calculation speed of the calculation of the optimal operation simulation will be improved. The results were applied to Sihwaho tidal power plant using the full optimization method. The tide prediction took 496 data for two days from the data of predicting the sea tide of Sihwa small island in the marine institute. For optimal operation of tidal power plant, the two-stage SCADA design and the generator start / stop time according to the maximum generation yield were found to be in close agreement with the actual operation.

The difference between the turbine generator set point level and the actual level is shown by the change in the flow rate setpoint Q value of the flow control circuit PI, by adjusting George's water level by controlling the power usage and the hydrological drainage. The change in Q is the sum of the amount of power used and the number of hydrological discharges.

The flow rate set value is distributed to each unit flow rate by flow control. If the flow rate setting is higher than the water used per unit, the hydrostatic discharge control will be distributed to the hydrologic discharge. It is the change in the state of inflow and the amount of water used in the flow control that causes the level of George to change.

If there is a difference between George's inflow and discharge, the state equation that explains the correlation between the flow rates in terms of George's water level changes is shown in Equation 2.

Where Y _{t is the} actual headwater level, Y ₀ is the initial level for starting the mathematical model calculation, S _{0 is the} initial reservoir, Q _{IN is the} inflow (inflow from the reservoir), and Q _U is the generator on the sea side. Inflow through, Q _G : Hydrostatic discharge through the hydrology, Q _UG : Discharge discharged through the generator, Q _a : Evaporation flow in the reservoir

According to Equation 2, the operation state monitoring and the automatic control method of the aberration generator are automatically operated under optimum conditions for the entire aberration generator equipment to maximize the generation capacity and introduce a parallel control method (Joint Control) for maximum output operation. . Set point of parallel operation actively responds to the wave, flow velocity and falling variables. The generation output or the quantity of use is automatically controlled as if the whole generator operates one generator for the total load.

Therefore, the set value for the parallel operation method is the total set value plus the sum of the actual values of all generators operating in the "individual operation mode" as shown in equation (3).

Where: S _J : The setpoint to be distributed to each generator. S _G : Total setpoint for the entire plant, O _i : Actual value of generators operating in individual operation mode, O _t : Actual value of the stationary generator Setpoint to be distributed

Next, the optimal generation simulation for generator start stop determination will be described.

Tidal power generation should calculate the maximum power and maximum power generation for each tidal stone. In order to calculate the maximum power generation, it is important to determine the start / stop time of the generator. Optimization, arithmetic, reference model, and dynamic planning methods have been applied to tidal power plants to determine the start and stop times of aberration generators according to tidal size. In the present invention, two methods, "Time Advance Method" and "Full Optimization Method", which are simple in theory, accurate in calculation, and fast in calculation, are shown in FIG. 3, and the calculation process of "Full Optimization Method" applied in the present invention is shown. 4 is shown.

The "Time Advance Method" of FIG. 3 (a) shows the maximum generation amount by adjusting the time advanced value after calculating the generation time in consideration of the residual volume of George and the aberration generation at a specific head of the head. Determine the head difference that occurs.

"Full Optimization Method" of FIG. 3 (b) is to calculate the amount of power generation up to the maximum drop while varying by 0.1m from the lowest possible head pore difference to the rated head difference for each tidal phase to determine the head generation at which the maximum generation amount occurs.

Since tidal power plants must operate and monitor large-scale facilities by flooding and draining George through several aberration generators and sluices of the same size, the introduction of a remote control system (SCADA) is becoming common. In the model according to the present invention, the "Full Optimization Method" with excellent calculation speed was used to efficiently use the real-time optimal linkage operation by the computational function of the measurement and control device and the computer in the SCADA system. The calculation process is the same as the process of a, b, c of FIG.

로 미분한 시간 간격을 y축의 낙차를 0.1m 증가시켜 반복계 산에 의해 최대발전량이 생산되는 시점과 종점을 결정하는 것으로 수차를 통과하는 유량특성은 외조위와 내수위의 수두차와 발전사용수량에 대한 함수로 최대발전량의 수학식은 다음 식4와 같다.In addition, the optimal power generation simulation is based on the variation of freefall, which is the difference between the y-axis tide and the tide level, and the time on the x-axis.

The differential time interval is increased by 0.1m from the y-axis to determine the start point and end point of the maximum power generation by repeated calculation. Equation 4 of the maximum power generation as a function of

: i시간대의 수차 및 발전기 효율Where P _max : maximum power generation amount. P _i: the output of the time zone i, Q _i: i developed using amount of time, H _i: the development of free fall time i,

: Aberration and Generator Efficiency in i-time

In general, the control layer structure of the SCADA system in a large-scale system comprises a control layer of four layers as shown in Table 1 below. In case of introducing 4th level SCADA system to tidal power plant, 4th level "Dispatch Control Level" refers to the linkage operation between power plant and the outside, that is, the power supply dispatch level of power generation that divides the load of the entire power system by power plant in the power exchange. However, in the case of tidal power plants, it is difficult to operate the economical power supply to reduce fuel costs like thermal power plants.

Since it should be operated based on the tidal energy of the ocean, which is a natural phenomenon of tidal power, it should be developed and operated by George's "Rule Curve" by tidal prediction based on tidal power generation operation plan separately from load adjustment of electric power system. Therefore, the 4th level "Dispatch Control Level" of the top level can be defined as the integrated operation level of dam and power plant production of maximal generation output by tidal and tidal prediction and George's reservoir curve rule. .

The three-level power station is an integrated control layer of the power plant. The basic functions of HMI, network management, operation analysis by data access of RDBS, reporting and operation by data access of D / B, and the whole plant Power plant integrated operation control is performed by tracking the reservoir operation rule curve for the production of the maximum power generation in management by the output or the quantity used.

At level 2, the load sharing is applied to generators capable of generating the "global setting" value of the entire plant, and the maximum output operation is performed by the maximum efficiency tracking control by the manufacturer's fill chart curve.

Level 1 will be an automatic control layer for each level.

Control Hierarchy  level Control  Application level of tidal power plant S / W Remarks 4 levels Dispatch Control Dam and power plant integrated operation level Power Management & Decision maker Integrated operation of ocean tide and George reservoir & tidal power generation facilities 3 levels Station contro Power plant integrated operation level Joint Control & Optimization Schedule Operation Tidal Generator and Hydrological Linkage Operation 2 levels Local Control Aberration / Generator Operation Level Remote Control & Supervisory of Generator Supervisory control linked to aberration generator and auxiliary equipment 1 level Individual Control Automatic controller control level Automation Control AVR and Gov Automatic Control (PID Control) Automatic control

In addition, Figure 5 shows the configuration of a typical SCADA system. In the introduction and application of the tidal power plant of the SCADA system, the basic function is a system that remotely monitors and controls the operation status of the tidal power plant. In general, three layers are applied.

The lower tier consists of instrumentation and control at the local control level, the second tier performs monitoring and control by group at the station control level, and the upper tier 3 is based on the computer at the supervisory control and information system level. Remote monitoring of the entire facility is carried out and system design and optimal simulation are performed.

In FIG. 5, the hydrological information, ocean and water quality interface are interfaced to external organizations, and the tide prediction and power generation model simulation provide the maximum power generation calculation and the generator start and stop time as the optimal operation system of the power plant. Protect generator operation through George's flood operation and tidal wave information.

Electric power facilities and building facilities are included in the remote monitoring control object, and the aberration generator is designed to operate the power generation in a constant manner as if a plurality of aberration governors are operated in conjunction with the total load in joint control. In each unit aberration turbine, it adjusts angle of guide vane and runner to individual load and automatically controls individual output.

Next, the design of the method for utilizing tide measurement data dualization will be described.

The optimal operational problems of tidal power plants are the establishment of an optimal power generation plan based on tidal and tidal forecasting, the monitoring of the condition of the facilities, and the automatic shutdown of the generator. In this design method, the method of using tide observation data is designed as a two-level method at the station level as shown in FIG. 6 at the station level. That is, one measurement value performs real-time operation monitoring control of the aberration generator, and another measurement value is provided as an input value of the optimal power generation operation plan calculation, and the result of the optimal operation plan is transmitted to the SCADA main controller at regular intervals. Start of the generator is stopped in real time.

Next, the analysis of the monitoring control system will be described.

The remote supervisory control system of tidal power plant is in charge of power supply management of power plant by keeping supervision and control in real time by keeping pace with automatic control equipment, measurement control device and control panel of water turbine generator. SCADA's supervisory control structure maintains hierarchical independence at each level, based on two function distributions, at the local control level and the station control level. do. The devices that make up the control system are backed up and exchange information with each other through an industrial communication network based on fiber optic technology.

Surveillance control system is based on image processing and HMI system, and provides graphical support for comparing the average and observed and predicted values of data retrieval from real-time database. The analysis of such a supervisory control system is shown in FIG. 7.

Next, the design of the tidal power plant SCADA configuration will be described.

This design method uses hierarchical observation data as a hierarchical two-level method. The operation is divided into two (one level: general operation, two levels: supervisory control), and the supervisory control is centralized supervision and control in one system.

8 shows a hierarchical control structure analysis diagram.

Next, application examples of the optimal power generation operation plan according to the present invention will be described.

The application overview according to the present invention is as follows.

Sihwa Lake Tidal Power Plant, which is building the world's largest tidal power plant, is a forged-flow single-flow power plant (creation type) with aberration capacity of 25.4MW x 10 units and drainage gate (B15.3m x H12.0m) with 8 units. The center water level is EL (-) 13.0m and the design status of the power plant is as shown in FIG. 9.

In addition, the survey data are as follows.

The tides are generally represented at 18.6 years, 1 year, and 1 month period. In this model, tidal data of Sihwa small island were estimated from the Marine Invention 2002.7.1-2003.6. Two days (497 units of 6 minutes) of 30 data were used.

This tide prediction is shown in FIG.

The george level for the initial volume V _i is represented by Zi by the content curve of FIG. 11, and the george level is calculated as Z _{i + 1} for the next step George volume V _{i + 1} .

The characteristic curve of the aberration flow rate is as shown in FIG. 12, and only the flow rate passing through the aberration is calculated since the water gate is closed during power generation. The flow rate Q _t passing through the manufacturer's fill chart (Curve-fitting) using the curve fitting (Curve-fitting) method to express the output by the head difference and efficiency in polynomial is equal to 5.

Q _t = (k ₆ * H _g ⁶ + k ₅ * H _g ⁵ +… + k ₁ * H _g + k ₀ ) * N _t

eta = k ₆ * H _g ⁶ + k ₅ * H _g ⁵ +... + k ₁ * H _g + k ₀

Where: Q _t : Aberration flow rate in power generation (m ³ / s), η: Aberration efficiency (%), N _t : Number of aberration installation units (10 units), H _g : gross head (m), k ₀ ~ k ₆ : coefficient derived from aberration characteristic curve

However, the flow characteristic curve expression is expressed by two equations based on the rated head H _R.

In addition, the characteristic curve of the hydrologic flow rate is as follows.

The hydrologic flow rate is B16.3m x H12.0m x 8, and the hydrologic flow characteristic is expressed as 6

Q _ng = N _ng * a * ΔH ^b

Where N _ng : number of new drainage locks installed (large), a: coefficient derived from model test, ΔH: head difference gross head (m)

The characteristic curve of the turbine drainage flow is shown in Equation 7,

Q _tr = (k ₆ * H _g ⁶ + k ₅ * H _g ⁵ +… + k ₁ * H _g + k ₀ ) * N _t

Where Q _tr : Aberration flow rate in drainage (m ³ / s), N _t : Number of aberration installations (10 units)

The method of optimal calculation according to the present invention is as follows.

Tidal power has a limited capacity. As a method for maximizing power generation under facility constraint conditions, a power generation calculation flowchart is shown in FIG. 13.

The minimum possible fall of the power generation is set as an initial value, and the equal interval i of the tidal curve is i = i ₀ +1, which is calculated repeatedly up to the maximum tide level.When George level X _i reaches the final level X _i = X _L , Finish the calculation.

The calculation result of this operation procedure is as follows.

FIG. 14 shows the cycle of drainage-> power generation-> power generation-> water drain by the tides in the result of calculating the time division (DT) for 6 minutes and calculating data for 2 days (496). Giving.

As a result of calculating the optimum starting and stopping time, the starting time and the generating time are different according to the size of the tides in FIG. 15, and the stopping time is well represented by approaching a certain operating level.

That is, the optimal power generation control system of the tidal power plant according to the present invention is a system for controlling the optimal power generation of the tidal power plant on the basis of real time data, as shown in FIG. The optimum model simulation unit which receives the tide information from the device unit and the measuring unit unit and outputs the predicted tide information for determining the start and end tidal power generation for optimal power generation, and receives the tide information from the measuring unit unit. It receives the predicted tide information, determines the start and end time of power generation, executes power generation start and end commands, controls and monitors various facilities of the tidal power plant, and compares the information about the predicted tide with the measured tide. It is provided with the structure containing the main supervisory control system which outputs. In addition, since other components shown in FIG. 8 may use the configuration described in Korean Patent Publication No. 2006-0116344 filed by the inventor of the present invention, a detailed description thereof will be omitted.

The main feature of the present invention is that the optimal model simulation unit equipped with the tidal power generation simulation operation model differentiates the change in the generation uptime and the quantity of use of the power generation by a certain range to predict a range having the maximum generation amount and the minimum generation uptime among the range. will be.

In addition, the best model simulation unit according to the present invention, the tide database unit for storing a predetermined period of the tide information input from the measurement device unit, the tide prediction unit and the tide prediction unit for predicting the tide by the information stored in the tide database unit It is a configuration that includes an optimal power generation simulation unit for predicting the maximum power generation start and end level of power generation by the tidal power predicted by the power generator, and the optimal power generation simulation unit repeatedly executes the derivative for each range to have the maximum power generation and the minimum power generation run time. To predict.

That is, the optimal power generation control system of the tidal power plant according to the present invention achieves optimization according to the change of power generation run time (starting and ending) and the quantity of use of power generation in order to calculate the maximum power generation condition from past tidal information and tidal level information. In order to differentiate the change in generation operation time and the quantity of use of power generation by a certain range (operation time and quantity of use), it predicts the range with the maximum generation amount and the minimum generation operation time among the predetermined ranges, and differentiates the predicted range again to maximize By minimizing the range of power generation and repeatedly predicting the actual operation to the required range, the maximum generation amount and minimum generation time of the power generation control system are minimized.

Next, a control method according to the optimum power generation control system of the tidal power plant will be described with reference to FIG.

16 is a flowchart illustrating a control method according to the optimal power generation control system of the tidal power plant according to the present invention.

First, we measure the tide of the sea using the tide measurement sensor to obtain real time data as the facility constraint condition of the power plant, collect the tide information by storing the real time data to obtain the tide data at a certain period in the past, and from the tide information The amount of water flowing in and the amount of water flowing out of George are combined to store and collect data (Georgian water level information) calculated from George's constraints (S10).

Next, the tidal power generation simulation operating model is mounted on the optimum model simulation unit (S20).

Next, the optimum model simulation unit differentiates the change in the power generation operating time and the quantity of use of the power generation by a certain range, and predicts a range having the maximum generation amount from the predetermined range (S30).

The optimal generation simulation unit determines whether the range predicted in step S30 is a range having the maximum generation amount (S40).

If it is determined in step S40 that the range is not the maximum generation amount, the flow advances to step 30 to predict the range having the maximum generation amount again.

Next, when it is determined in step S40 that the range has the maximum amount of power generation, it is determined whether the predicted range is the range having the minimum power generation operating time (S50).

If it is determined in step S50 that it is not the range having the minimum power generation operating time, the flow advances to step 30 to predict the range having the maximum power generation amount and the minimum power generation operating time again.

The optimum model simulation unit re-differentiates the range predicted in the step S30 to narrow down the range having the maximum generation amount and the minimum generation operating time, and repeatedly predicts the actual range from the actual operation to the required range (S30). This iteration prediction step S30 is repeated until it determines with the range which has the largest generation amount.

Next, if it is determined in step S50 that the range has the minimum power generation operating time, the generation start time and the generation stop time and the George water level for the time are predicted, and the quantity used during the generation operation is predicted (S60), and the prediction is made in step S60. The information is transmitted to the main monitoring control unit shown in FIG. 8 so that the main monitoring control unit controls the generator, the transmission and reception facility, the hydrological facility, and the like.

Next, the optimum model simulation unit ends the prediction of the maximum generation amount and the minimum generation operating time (S70).

The state of the start and end of power generation by this method is shown in FIG.

As mentioned above, although the invention made by this inventor was demonstrated concretely according to the said Example, this invention is not limited to the said Example and can be variously changed in the range which does not deviate from the summary.

The optimal power generation control system and method of the tidal power plant according to the present invention is applied to the optimized power generation operation in tidal power plant for maximizing tidal power generation.

1 is a view showing a tidal cycle operation mode,

2 is a flowchart for calculating tidal power generation amount;

3 and 4 are diagrams for explaining an optimal power generation simulation for generator start stop determination;

5 is a configuration diagram of a typical SCADA system,

6 is a flow chart for constructing the George's water level prediction and the optimal model;

7 is an analysis diagram of the monitoring control system;

8 is a hierarchical control structure analysis diagram;

9 is a view showing the design status of the power plant,

10 is a graph showing tide prediction;

11 is a diagram showing a content curve of George;

12 is a characteristic curve of aberration flow rate,

13 is a flowchart for calculating an amount of power generation;

14 is a graph showing a calculation result of an operating procedure;

15 is a view showing a result of calculating the optimum starting and stopping time;

16 is a flowchart illustrating a control method according to the optimal power generation simulation operation control system of the tidal power plant according to the present invention;

FIG. 17 is a graph showing states of start and end of power generation according to the method shown in FIG. 16; FIG.

Claims (5)

As a system to control the optimal power generation of tidal power plant based on real time data, A measurement device unit for measuring the tide and transmitting the measured tide information; Receives the tide information from the measuring device unit, simulates and operates the optimal power generation for the purpose of producing the minimum power generation time and maximum power generation during tidal start and end periods to determine the start and end time of power generation, and then predict the george level at that time. Optimal model simulation unit for outputting information Receives the george level information from the measuring device unit, receives the predicted george level information from the optimal model simulation unit to determine the start and end time of power generation, and to perform power generation start and end commands, and various facilities of the tidal power plant. It includes a main monitoring and control system for controlling and monitoring the output, and compares the information on the predicted George level with the information on the measured George level, and outputs, The optimum model simulation unit differentiates the minimum generation uptime and the change in the quantity of use of the power generation by a certain range, and predicts the range having the maximum generation amount and the minimum generation operating time among the predetermined ranges. Simulation operation control system. The method of claim 1, The optimal model simulation unit is a water level database unit for storing information of a predetermined period of the water level information input from the measuring device unit, A george level predictor for predicting george level based on the information stored in the george level database unit; An optimum power generation simulation unit for predicting the maximum power generation start and end power generation level possible by the level of the George predicted by the level controller; The optimum power generation simulation unit repeatedly executes the derivatives for each predetermined range to predict the range having the maximum power generation amount and the minimum power generation operating time. The method of claim 2, The tidal level is predicted by the tide information and the data calculated from the constraints of the tidal level, and the predicted tidal level information is the optimal power generation for tidal power plants, which is a standard of the George's operation such as power generation and opening / closing of the floodgate. Simulation operation control system. Prediction step of differentiating the change of generation operation time and the quantity of use of power generation by a certain range, and predicting the range having the maximum generation amount among the predetermined ranges, An iterative prediction step of re-differentiating the range predicted in the prediction step to narrow down the range having the maximum generation amount and the minimum generation operation time and repeatedly predicting the actual range from the actual operation to the required range; Determining the maximum generation amount and the minimum generation operation time predicted in the iterative prediction step, And determining the tidal level in the case where the maximum power generation amount and the minimum power generation operating time are the power generation start and end tidal water levels. The method of claim 4, wherein Measuring the tide of the sea to obtain real-time data as the facility constraint condition of the power plant; Storing the real time data in order to obtain historical tide data at a certain period; The predicting step is a method for optimal generation simulation operation control of tidal power plant, characterized in that to predict the level of the water level possible by predicting the differential level from the previous tide data stored in the storage step.

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