CN105206381A - Intelligent energy-saving distribution capacity-increasing distribution transformer and monitoring method - Google Patents

Abstract

The invention relates to an intelligent energy-saving and capacity-increasing distribution transformer. The built-in voltage and current transformer of the high-voltage lead-out line is installed on the high-voltage side of the distribution transformer body; the built-in voltage and current transformer of the low-voltage lead-out line is installed on the side of the distribution transformer body. Low-voltage side; the sunlight sensor is installed on the top of the distribution transformer body shell; the transformer oil level and oil temperature sensor is installed on the inner wall of the transformer oil tank on the top of the distribution transformer body; the intelligent monitoring terminal is installed on the distribution transformer body shell On the side wall, the built-in voltage and current transformers of the high-voltage lead-out line, the built-in voltage and current transformers of the low-voltage lead-out line, the signal output terminals of the sunshine sensor and the transformer oil level and oil temperature sensor are all connected to the intelligent monitoring terminal. The invention can realize real-time operation state monitoring and environmental condition monitoring, and can judge the operation state of the transformer.

Description

Intelligent energy-saving and capacity-increasing distribution transformer and monitoring method

technical field

The invention relates to the technical field of power transmission and distribution, in particular to an intelligent energy-saving capacity-increasing power distribution transformer and a monitoring method.

Background technique

Distribution transformers are critical equipment in power systems. At present, in most communities in my country, the intelligence of power distribution equipment is low, there are few operating status monitoring equipment, and there is a lack of information transmission channels. At present, the traditional equipment regular maintenance method is still used. To ensure the safe operation of the equipment, it does not have a good economy, and with the development of my country's power grid construction, the increase in power consumption and the improvement of users' requirements for power quality, the workload of maintenance personnel has gradually increased. The traditional regular maintenance method consumes a lot of manpower and material resources and reduces work efficiency.

Contents of the invention

The object of the present invention is to provide an intelligent energy-saving and capacity-increasing distribution transformer and a monitoring method, which can realize real-time monitoring of operating status and environmental conditions, and judge the operating status of the transformer.

In order to solve the above technical problems, the present invention discloses an intelligent energy-saving and capacity-enhancing distribution transformer, which includes a distribution transformer body, and is characterized in that it also includes built-in voltage and current transformers for high-voltage lead-out lines, built-in voltage and current transformers for low-voltage lead-out lines Current transformer, sunlight sensor, transformer oil level and oil temperature sensor and intelligent monitoring terminal, wherein, the built-in voltage and current transformer of the high-voltage lead-out line is installed on the high-voltage side of the distribution transformer body for monitoring the high-voltage of the distribution transformer body Real-time voltage and current values on the side;

The built-in voltage and current transformer of the low-voltage lead-out line is installed on the low-voltage side of the distribution transformer body, and the built-in voltage and current transformer of the low-voltage lead-out line are used to monitor the real-time voltage value and current value of the low-voltage side of the distribution transformer body;

The sunshine sensor is installed on the top of the distribution transformer body shell, and the sunshine sensor is used to monitor the real-time sunshine heat of the distribution transformer body;

The transformer oil level and oil temperature sensors are installed on the inner wall of the transformer oil tank located at the top of the distribution transformer body, and the transformer oil level and oil temperature sensors are used to monitor the oil temperature and oil level in the transformer oil tank;

The intelligent monitoring terminal is installed on the side wall of the distribution transformer body shell, the high-voltage lead-out line has a built-in voltage and current transformer, the low-voltage lead-out line has a built-in voltage and current transformer, a sunshine sensor, and a transformer oil level and oil temperature sensor The signal output terminals of all are connected to the signal input terminals of the intelligent monitoring terminal.

A method for monitoring the above-mentioned intelligent energy-saving capacity-increasing distribution transformer, which includes the following steps:

Step 1: The transformer oil level and oil temperature sensor measures the real-time transformer oil temperature t _change of the distribution transformer body, the ambient temperature sensor measures the real-time ambient temperature t _ring around the distribution transformer body, and the ambient air density sensor measures the distribution transformer body The surrounding real-time ambient air density ρ, the ambient air constant pressure specific heat measuring instrument measures the real-time constant pressure specific heat c of the air around the distribution transformer body, the ambient wind speed sensor measures the real-time ambient wind speed Q around the distribution transformer body, and the sunshine sensor measures the distribution transformer. The real-time sunshine heat Φ of the electric transformer body _, at the same time, the transformer oil level and oil temperature sensor, ambient temperature sensor, ambient air density sensor, ambient air constant pressure specific heat measuring instrument, ambient wind speed sensor and sunshine sensor respectively measure the transformer oil temperature t _Variable , ambient temperature t _ring , ambient air density ρ, air constant pressure specific heat c, ambient wind speed Q and sunshine heat Φ are transmitted to the intelligent monitoring terminal _daily ;

Step 2: Based on the transformer oil temperature _tchange , ambient temperature _tcircle , ambient air density ρ, air constant pressure specific heat c, and ambient wind speed Q obtained above, the intelligent monitoring terminal uses the formula _Φscatter =ρcQ( _tchange - _tcircle ) Calculate the heat emitted by the distribution transformer body due to the influence of wind speed;

Step 3: When the transformer oil temperature t obtained by the intelligent monitoring terminal _becomes >85°C, it means that the distribution transformer body is not operating under normal load;

When the transformer oil temperature t obtained by the intelligent monitoring terminal _becomes less than 70°C, it means that the distribution transformer body is in normal load operation;

When the transformer oil temperature obtained by the intelligent monitoring terminal is 70° _C≤t =85°C, further calculate the difference between _Φri and the heat _Φdissipated by the distribution transformer body due to the influence of wind speed, when Φri _{- Φscatter≥} 0 o'clock means that sunshine affects the normal operation of the distribution transformer body;

When Φday _{- Φscatter} <0, it means that the heat of sunlight can be transmitted through the air flow, and the distribution transformer body is in normal operation.

Beneficial effects of the present invention:

The present invention can realize real-time monitoring of operating state and environmental conditions, and judge the operating state of the transformer. Compared with the traditional manual inspection method, the present invention greatly improves the monitoring efficiency of the operating state of the transformer, and the operating state of the transformer The monitoring results are more accurate, which is convenient for operation and maintenance personnel to repair the faulty transformer in time, and is conducive to improving the service life of the transformer. After using the invention, operation and maintenance personnel can increase the maximum transmission power of the distribution transformer on the basis of ensuring the safety of the distribution transformer, thereby achieving the purpose of dynamic capacity increase.

Description of drawings

Fig. 1 is a block diagram of the present invention;

Fig. 2 is the structural block diagram of circuit part of the present invention

Among them, 1—the built-in voltage and current transformer of the high-voltage lead-out line, 2—the built-in voltage and current transformer of the low-voltage lead-out line, 3—GPS positioning equipment, 4—sunshine sensor, 5—transformer oil level and oil temperature sensor, 6—smart Monitoring terminal, 7—distribution transformer body, 8—transformer oil tank, 9—ambient temperature sensor, 10—ambient air pressure sensor, 11—ambient wind speed sensor, 12—ambient air density sensor, 13—ambient air constant pressure specific heat measuring instrument , 14—remote user control system.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

An intelligent energy-saving and capacity-increasing distribution transformer of the present invention includes a distribution transformer body 7, a built-in voltage and current transformer 1 for a high-voltage lead-out line, a built-in voltage and current transformer 2 for a low-voltage lead-out line, a sunshine sensor 4, and a transformer oil level And the oil temperature sensor 5 and the intelligent monitoring terminal 6, wherein, the built-in voltage and current transformer 1 of the high-voltage lead-out line is installed on the high-voltage side of the distribution transformer body 7, and is used to monitor the real-time voltage value of the high-voltage side of the distribution transformer body 7 and current value;

The built-in voltage and current transformer 2 of the low-voltage lead-out line is installed on the low-voltage side of the distribution transformer body 7, and the built-in voltage and current transformer 2 of the low-voltage lead-out line is used to monitor the real-time voltage value and current value of the low-voltage side of the distribution transformer body 7 ;

The sunshine sensor 4 is installed on the top of the distribution transformer body 7 housing, and the sunshine sensor 4 is used to monitor the real-time sunshine heat of the distribution transformer body 7;

The transformer oil level and oil temperature sensor 5 is installed on the inner wall of the transformer oil tank 8 located at the top of the distribution transformer body 7, and the transformer oil level and oil temperature sensor 5 is used to monitor the oil temperature and oil level in the transformer oil tank 8;

The intelligent monitoring terminal 6 is installed on the side wall of the distribution transformer body 7 housing, the high-voltage lead-out line has a built-in voltage and current transformer 1, the low-voltage lead-out line has a built-in voltage and current transformer 2, a sunshine sensor 4 and transformer oil The signal output terminals of the position and oil temperature sensor 5 are all connected to the signal input terminals of the intelligent monitoring terminal 6 .

In the above technical solution, it also includes a GPS (Global Positioning System, Global Positioning System) positioning device 3, the GPS positioning device 3 is installed on the top of the distribution transformer body 7 housing, and the communication terminal of the GPS positioning device 3 is connected to the intelligent monitoring system. The GPS positioning data communication terminal of the terminal 6. The GPS positioning device 3 can monitor the location of the distribution transformer. When the location of the distribution transformer changes, the system can give an alarm and locate the location of the distribution transformer.

In the above technical solution, it also includes a peripheral meteorological data sensor, the signal output end of which is connected to the environmental meteorological data communication end of the intelligent monitoring terminal 6 .

In the above technical solution, the peripheral meteorological data sensor includes an ambient temperature sensor 9, an ambient air pressure sensor 10, and an ambient wind speed sensor 11, and the signal output terminals of the ambient temperature sensor 9, the ambient air pressure sensor 10, and the ambient wind speed sensor 11 are all connected to a smart phone. The environmental meteorological data communication terminal of the monitoring terminal 6.

In the above-mentioned technical scheme, it also includes an ambient air density sensor 12 and an ambient air constant pressure specific heat measuring instrument 13, and the signal output ends of the ambient air density sensor 12 and the ambient air constant pressure specific heat measuring instrument 13 are connected to an intelligent monitoring terminal 6 environmental meteorological data communication terminal.

In the above technical solution, it also includes a remote user control system 14, the communication end of the remote user control system 14 is wirelessly connected to the data communication end of the intelligent monitoring terminal 6.

The ambient temperature sensor 9 , ambient air pressure sensor 10 , ambient wind speed sensor 11 , ambient air density sensor 12 and ambient air constant pressure specific heat measuring instrument 13 are all set in the environmental data collection points around the distribution transformer body 7 . The remote user control system 14 is set in the remote operation and maintenance personnel's office.

In the above technical solution, the distribution transformer body 7 uses a three-dimensional wound core energy-saving distribution transformer. The reason for choosing the three-dimensional wound core transformer is that the three-dimensional wound core transformer has the advantages of low no-load loss, stable magnetic field, and less magnetic flux leakage. It meets the requirements of today's society for energy saving and emission reduction.

The invention comprehensively determines the operating capacity of the distribution transformer by measuring the transformer's own parameters such as the voltage, current, and oil temperature of the distribution transformer, and external parameters such as the external environment temperature, wind speed, and sunshine intensity. In this way, it is convenient for the operation and maintenance personnel to increase the maximum transmission power of the distribution transformer in terms of scheduling.

A monitoring method for the above-mentioned intelligent energy-saving capacity-increasing distribution transformer is characterized in that it includes the following steps:

Step 1: The transformer oil level and oil temperature sensor 5 measures the real-time transformer oil temperature t _change of the distribution transformer body 7, the ambient temperature sensor 9 measures the real-time ambient temperature t _ring around the distribution transformer body 7, and the ambient air density sensor 12 Measure the real-time ambient air density ρ around the distribution transformer body 7, the ambient air constant pressure specific heat measuring instrument 13 measures the real-time constant pressure specific heat c of the air around the distribution transformer body 7, and the ambient wind speed sensor 11 measures the distribution transformer body 7 surroundings The real-time ambient wind speed Q, the sunshine sensor 4 measures the real-time sunshine heat Φday of the distribution transformer body _7, and at the same time, the transformer oil level and oil temperature sensor 5, the ambient temperature sensor 9, the ambient air density sensor 12, the ambient air constant pressure specific heat Measuring instrument 13, ambient wind speed sensor 11 and sunshine sensor 4 respectively transmit _transformer oil temperature t, ambient temperature t _ring , ambient air density ρ, air constant pressure specific heat c, ambient wind speed Q and sunshine heat Φ to _the intelligent monitoring terminal 6;

Step 2: The intelligent monitoring terminal 6 uses _the formula _Φscatter =ρcQ(t _{change -} t _ring ) Calculating the heat emitted by the distribution transformer body 7 due to the influence of wind speed;

Step 3: When the transformer oil temperature t obtained by the intelligent monitoring terminal 6 _becomes >85°C, it means that the distribution transformer body 7 is not operating under normal load;

When the transformer oil temperature t obtained by the intelligent monitoring terminal 6 _becomes <70°C, it means that the distribution transformer body 7 is operating under normal load;

When the temperature of the transformer oil obtained by the intelligent monitoring terminal 6 is 70° _C≤t =85°C, further calculate the difference between _Φday and the heat _Φdissipated by the distribution transformer body 7 due to the influence of wind speed _, when Φday-Φ When _scatter ≥ 0, it means that the sunlight affects the normal operation of the distribution transformer body 7. At this time, it is recommended that the operation and maintenance personnel closely observe the transformer and reduce the load when conditions permit; when Φ - Φ _scatter < 0 _, it means that the heat of sunshine can The air flows out, and the distribution transformer body 7 operates normally.

In step 1 of the above technical solution, the built-in voltage and current transformer 1 of the high-voltage lead-out line monitors the real-time voltage value and current value of the high-voltage side of the distribution transformer body 7; the built-in voltage and current transformer 2 of the low-voltage lead-out line monitors the distribution transformer body 7 The real-time voltage value and current value of the low-voltage side; the built-in voltage and current transformer 1 of the high-voltage lead-out line and the built-in voltage and current transformer 2 of the low-voltage lead-out line respectively record the real-time voltage value and current value of the high-voltage side of the distribution transformer body 7 and the power distribution The real-time voltage value and current value of the low-voltage side of the transformer body 7 are transmitted to the intelligent monitoring terminal 6;

In the step 3, when one of the real-time voltage and current values on the high-voltage side of the distribution transformer body 7 and the real-time voltage and current values on the low-voltage side is no longer within the preset standard range, it means that the distribution transformer Body 7 is running abnormally.

Through the above methods, on the basis of ensuring the safety of the distribution transformer, the maximum transmission power of the distribution transformer can be increased to achieve the purpose of dynamic capacity increase.

After step 3 of the above technical solution, step 4 is also included: the intelligent monitoring terminal 6 uploads the result of whether the distribution transformer body 7 is running normally to the remote user control system 14 .

The unit of the ambient temperature data unit measured by the present invention is Celsius (° C.), the unit of the wind speed data unit used uniformly is cubic meters per hour (m ³ /h), and the sunshine data unit measured is The unified unit used is kilojoules (kJ), and the unit used uniformly for the measured internal oil temperature data of distribution transformers is Celsius (°C).

The content not described in detail in this manual belongs to the prior art known to professional operation and maintenance personnel in the field.

Claims (9)

1. an intelligent power saving increase-volume distribution transformer, it comprises distribution transformer body (7), it is characterized in that: it also comprises high-voltage leading-out wire built-in voltage and current transformer (1), low pressure lead-out wire built-in voltage and current transformer (2), sunshine recorder (4), transformer oil level and oil temperature sensor (5) and intelligent monitoring terminal (6), wherein, described high-voltage leading-out wire built-in voltage and current transformer (1) are arranged on the high-pressure side of distribution transformer body (7), for monitoring the on high-tension side real-time voltage value of distribution transformer body (7) and current value,

Described low pressure lead-out wire built-in voltage and current transformer (2) are arranged on the low-pressure side of distribution transformer body (7), and low pressure lead-out wire built-in voltage and current transformer (2) are for monitoring real-time voltage value and the current value of distribution transformer body (7) low-pressure side;

Described sunshine recorder (4) is arranged on the top of distribution transformer body (7) housing, and sunshine recorder (4) is for monitoring the heat at real-time sunshine of distribution transformer body (7);

Described transformer oil level and oil temperature sensor (5) are arranged on the madial wall of the oil tank of transformer (8) being positioned at distribution transformer body (7) top, and transformer oil level and oil temperature sensor (5) are for monitoring oil temperature in oil tank of transformer (8) and oil level;

Described intelligent monitoring terminal (6) is arranged on the sidewall of distribution transformer body (7) housing, and the signal output part of described high-voltage leading-out wire built-in voltage and current transformer (1), low pressure lead-out wire built-in voltage and current transformer (2), sunshine recorder (4) and transformer oil level and oil temperature sensor (5) is all connected the signal input part of intelligent monitoring terminal (6).

2. intelligent power saving increase-volume distribution transformer according to claim 1, it is characterized in that: it also comprises GPS positioning equipment (3), described GPS positioning equipment (3) is arranged on the top of distribution transformer body (7) housing, and the communication ends of described GPS positioning equipment (3) connects the GPS locator data communication ends of intelligent monitoring terminal (6).

3. intelligent power saving increase-volume distribution transformer according to claim 1, it is characterized in that: it also comprises peripheral meteorological data transducer, the signal output part of described peripheral meteorological data transducer connects the environment weather data communication end of intelligent monitoring terminal (6).

4. intelligent power saving increase-volume distribution transformer according to claim 3, it is characterized in that: described peripheral meteorological data transducer comprises environment temperature sensor (9), ambient pressure transducer (10) and ambient wind velocity transducer (11), described environment temperature sensor (9), ambient pressure transducer (10) and the signal output part of ambient wind velocity transducer (11) are all connected the environment weather data communication end of intelligent monitoring terminal (6).

5. intelligent power saving increase-volume distribution transformer according to claim 1, it is characterized in that: it also comprises surrounding air density sensor (12) and surrounding air specific heat at constant pressure measuring instrument (13), described surrounding air density sensor (12) and the signal output part of surrounding air specific heat at constant pressure measuring instrument (13) are all connected the environment weather data communication end of intelligent monitoring terminal (6).

6. intelligent power saving increase-volume distribution transformer according to claim 1, it is characterized in that: it also comprises remote subscriber control system (14), the communication ends of described remote subscriber control system (14) is connected with intelligent monitoring terminal (6) data communication end radio communication.

7. a method for supervising for intelligent power saving increase-volume distribution transformer described in claim 1, it is characterized in that, it comprises the steps:

Step 1: described transformer oil level and oil temperature sensor (5) measure the real-time transformer oil temperature t of distribution transformer body (7) _become, environment temperature sensor (9) measures the real-time ambient temperature t of distribution transformer body (7) around _ringsurrounding air density sensor (12) measures the real-time surrounding air density p of distribution transformer body (7) around, the real-time pressurization by compressed air specific heat c of distribution transformer body (7) measured around by surrounding air specific heat at constant pressure measuring instrument (13), distribution transformer body (7) ambient wind velocity Q real-time around measured by ambient wind velocity transducer (11), and sunshine recorder (4) measures the heat Φ at real-time sunshine of distribution transformer body (7) _daymeanwhile, transformer oil level and oil temperature sensor (5), environment temperature sensor (9), surrounding air density sensor (12), surrounding air specific heat at constant pressure measuring instrument (13), ambient wind velocity transducer (11) and sunshine recorder (4) are respectively by transformer oil temperature t _become, ambient temperature t _ring, surrounding air density p, pressurization by compressed air specific heat c, ambient wind velocity Q and sunshine heat Φ _daybe transferred to intelligent monitoring terminal (6);

Step 2: intelligent monitoring terminal (6) is according to transformer oil temperature t obtained above _become, ambient temperature t _ring, surrounding air density p, pressurization by compressed air specific heat c and ambient wind velocity Q, utilize formula Φ _loose=ρ cQ (t _become-t _ring) calculate distribution transformer body (7) heat that gives out because of air speed influence;

Step 3: the transformer oil temperature t obtained when intelligent monitoring terminal (6) _becomeduring > 85 DEG C, represent distribution transformer body (7) improper load operation;

As the transformer oil temperature t that intelligent monitoring terminal (6) obtains _becomeduring < 70 DEG C, represent that distribution transformer body (7) normal duty runs;

As the transformer oil temperature 70 DEG C≤t that intelligent monitoring terminal (6) obtains _becomewhen≤85 DEG C, calculate Φ further _daythe heat Φ given out because of air speed influence with distribution transformer body (7) _loosebetween difference, work as Φ _day-Φ _looseillustrate when>=0 that solar radiation distribution transformer body (7) normally runs; Work as Φ _day-Φ _looseillustrate during < 0 that the heat at sunshine can be blazed abroad by air flowing, distribution transformer body (7) normally runs.

8. method for supervising according to claim 7, is characterized in that: in described step 1, and high-voltage leading-out wire built-in voltage and current transformer (1) monitor distribution transformer body (7) on high-tension side real-time voltage value and current value; The real-time voltage value of low pressure lead-out wire built-in voltage and current transformer (2) monitoring distribution transformer body (7) low-pressure side and current value; The real-time voltage value of on high-tension side for distribution transformer body (7) real-time voltage value and current value and distribution transformer body (7) low-pressure side and current value are transferred to intelligent monitoring terminal (6) by high-voltage leading-out wire built-in voltage and current transformer (1) and low pressure lead-out wire built-in voltage and current transformer (2) respectively;

In described step 3, when in the critical field having a value no longer to preset in the real-time voltage value and current value of the on high-tension side real-time voltage value of distribution transformer body (7) and current value and low-pressure side, then distribution transformer body (7) operation exception is described.

9. method for supervising according to claim 8, is characterized in that: also comprise step 4 after described step 3: distribution transformer body (7) is run whether normal result is uploaded to remote subscriber control system (14) by described intelligent monitoring terminal (6).