KR102107228B1 - Power measuring system - Google Patents

Abstract

The present invention, the voltage measurement module for transmitting the bus voltage data obtained through the voltage measurement device in the form of raw data; At least one current measuring module for transmitting the branch current data obtained through the current measuring device in the form of raw data; And a power calculation module that receives the raw data on voltage and current and calculates the power of the bus and branch lines by using the raw data. According to the present invention, various arithmetic processing processes for raw data related to the measured current and voltage can be simplified using a single module.

Description

Power measurement system {POWER MEASURING SYSTEM}

The present invention relates to a power measurement system, and more specifically, receives a voltage signal and a current signal of a mother bus and a branch line in the form of raw data, calculates the power value, and calculates the calculated power value of the switchboard and / or switchboard of the corresponding bus or branch line. It relates to a power measurement system displayed by the distribution panel.

The switchboard is installed at a branching point from the busbar, and circuitly includes a busbar and a plurality of branchers branching from the busbar. In addition, the switchboard may further include power measuring equipment for measuring power consumed by the bus and / or branch and / or a circuit breaker for blocking current flowing to the bus and / or branch.

The distribution panel is installed at the load end point of the branch line, and includes a branch line in a circuit. In addition, the distribution panel may further include power measuring equipment for measuring power consumed by the branch line and / or a circuit breaker for blocking current flowing to the branch line.

The power measuring equipment in the switchboard and / or the distribution panel measures and displays the current by measuring the current and voltage. And the current is measured by the current measuring equipment and the voltage is measured by the voltage measuring equipment.

In digital power measurement, the voltage applied to the load and the current flowing in the line are sensed, and when the sensed value is input to the power meter, the sensed value is pre-processed in the power meter and then converted in an analog-to-digital converter (A / D converter, ADC). The average power is obtained by calculating the average per cycle through multiplication and cumulative calculation. And in the process of sensing the voltage and current, a PT (Potential Transformer) and / or a resistance attenuation and a CT (Current Transformer) are used to convert the actual voltage and current into an analog voltage signal and an analog current signal.

1 is a block diagram of a current measuring device included in a switchboard and / or a switchboard according to the prior art.

Referring to FIG. 1, the current measurement device includes a current sensing unit, a current measurement control unit, a current data communication unit, and an individual power calculation unit. The current measuring device receives the digitally converted voltage data from the voltage measuring device, and collects the current data through the current sensing unit, that is, CT and ADC. And the current measuring device calculates power using the collected current data and the received voltage data. The calculated power data is transmitted to the power display device through the current data communication unit, and is displayed through the power display device.

The power measuring system including the current measuring device according to the prior art uses the RMS values of current and voltage in power calculation, and thus does not represent various states of power because it has only limited power information.

The power measurement system according to an embodiment of the present invention transmits raw data before RMS values are calculated in order to calculate current and power in a branch line, and includes power values using the transmitted raw data. It is characterized by calculating values representing various power states. In this regard, a power measurement system according to an embodiment of the present invention is distinguished from the above-described prior art and disclosed to solve the problems of the prior art.

Korean Registered Patent Publication No. 10-1012271 (2011.01.26.)

The problem to be solved by the present invention is to provide an electric shock measurement system that can predict a usage state, a usage amount, an abnormality, and a type of load for each load device through data pattern analysis using raw data about current and voltage. .

In addition, it is to provide a power measurement system that can simplify various calculation processing processes for raw data related to measured current and voltage using a single module.

Power measurement system according to an embodiment of the present invention, the voltage measurement module for transmitting the bus voltage data obtained through the voltage measurement device in the form of raw data; At least one current measuring module for transmitting the branch current data obtained through the current measuring device in the form of raw data; And a power calculation module that receives the raw data on voltage and current and calculates the power of the bus and branch lines by using the raw data.

Here, the power calculation module is characterized in that for calculating the bus current data using the current data transmitted by the at least one current measurement module.

Here, it is characterized in that it further comprises a data analysis module that analyzes the pattern of the raw data according to time, and predicts the usage state, usage, abnormality, and type of load for each load device using the analysis result.

Here, the current measurement module and / or the voltage measurement module is characterized in that raw data of current and / or voltage from which harmonics are removed is obtained using a low-pass filter.

Here, the power calculation module, using the raw data to calculate the RMS value of the bus voltage and the branch current, the current data relating to the RMS value is a current measurement module, the voltage data is transmitted to the voltage measurement module, respectively do.

Here, the power calculation module, the voltage measurement module and the current measurement module is characterized in that at least one or more of bus power, branch power, bus voltage, bus current and branch current is displayed as an RMS value through an output device.

Here, the power measurement system is characterized in that it further comprises a respective circuit breaker for blocking the power of the bus and branch lines to cope with short circuit, short circuit, over voltage and over current according to current, voltage and power measurement.

Here, the power operation module is characterized in that it generates a synchronization signal to obtain voltage and current data synchronized with each other.

According to the present invention, by using raw data on current and voltage, it is possible to predict the usage state, usage amount, abnormality, and type of load for each load device through data pattern analysis.

In addition, various arithmetic processing processes for raw data related to the measured current and voltage can be simplified using a single module.

1 is a block diagram of a current measuring device included in a switchboard and / or a switchboard according to the prior art.
2 is a block diagram of a power measurement system 1000 according to an embodiment of the present invention.
3 is a block diagram of a power measurement system according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the power measurement system will be described in detail with reference to the accompanying drawings.

The same reference numerals in each drawing denote the same members. In addition, specific structural or functional descriptions for one embodiment of the present invention are exemplified for the purpose of explaining an embodiment according to the present invention, and unless defined otherwise, all used herein including technical or scientific terms. The terms have the same meaning as generally understood by a person skilled in the art to which the present invention pertains. Terms such as those defined in a commonly used dictionary should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined herein. It is desirable not to.

2 is a block diagram of a power measurement system 1000 according to an embodiment of the present invention.

The power measurement system 1000 includes a power calculation and power display module 1100, a voltage measurement module 1200, a current measurement and power display module 1300, and a circuit breaker (MCCB) connected to a bus bar and a branch line. 1400) or an earth leakage breaker.

The power calculation and power display module 1100 receives the bus voltage data from the voltage measurement module 1200, receives the bus current data and the branch current data from the current measurement and power display module 1300, and uses them to power the bus power And to calculate and display branch power. The power calculation and power display module 1100 analyzes the patterns of the bus current data and the branch current data, that is, raw data, and uses the analysis results to predict the usage state, usage, abnormality, and type of load for each load device. Do it.

The voltage measurement module 1200 measures the bus voltage common to the bus and branch lines, and transmits the bus voltage data related to the bus voltage to the power calculation and display module 1100 in the form of raw data.

The current measurement and power display module 1300 measures the current flowing through the busbar and / or branch line, and transmits current data regarding the busbar and / or branch line current to the power calculation and display module 1100 in the form of raw data. do.

As one of the features of the present invention, data on the bus current is collected by collecting the branch current data, that is, the sum of the branch current data corresponds to the bus current data, so that the bus current is not measured separately. This is because the branch current data measured at each branch is transmitted to the power calculation and power display module 1100 and collected in one place. In addition, information about the bus current and bus power can be displayed through the power calculation and power display module 1100.

Referring back to FIG. 2, the flow of voltage data, current data, and power data is illustrated using three colored arrows. The raw voltage data is collected from the voltage measurement module 1200 and transmitted to the power calculation and power display module 1100, processed and displayed. In this case, the voltage measurement module 1200 may include its own display device 1240 to display information about the voltage data, and may combine and display functions in the power calculation and power display module 1100.

The raw current data is collected from the current measurement and power display module 1300 connected to each branch line, transmitted to the power calculation and power display module 1100, and processed and displayed. Then, power data related to each branch power value calculated by the power calculation and power display module 1100 is transmitted to the respective current measurement and power display module 1300 for display. Hereinafter, components of the power calculation and power display module 1100, the voltage measurement module 1200, and the current measurement and power display module 1300 constituting the power measurement system 1000 will be described in detail.

3 is a block diagram of a power measurement system according to an embodiment of the present invention.

Referring to FIG. 3, specific components of the power calculation and display module 1100, the voltage measurement module 1200, the current measurement and power display module 1300 shown in FIG. 2 are illustrated.

The power operation and power display module 1100 includes a power operation unit 1110, a raw data operation unit 1120, a data analysis unit 1130, a display module communication unit 1140, a display device 1150, and an external interface 1160. do.

As one of the features of the power measurement system 1000 according to an embodiment of the present invention, the power calculation and power display module 1100 is raw data received from the voltage measurement module 1200 and the current measurement and power display module 1300 Use to calculate the power of the mother bus and / or at least one branch line, for example active power, reactive power, and apparent power, and display them through the display device 1140.

The power operation unit 1110 receives power elements of a mother bus and at least one branch line required for power calculation from the raw data operation unit 1120, and calculates power, for example, active power, reactive power, and apparent power using the power elements do. Here, the power element includes a bus voltage, a bus current, an RMS value of at least one branch current, active power, reactive power, apparent power, and power factor. And the RMS value of the bus current can be calculated using the RMS value of at least one branch current.

The power calculation unit 1110, the raw data calculation unit 1120, and the data analysis unit 1130 included in the power calculation and power display module 1100 are functionally divided to form independent components, but perform calculation functions. It can be implemented through a central processing unit (CPU) that reads the program and performs the analysis function and performs the corresponding function. Here, the central processing unit may include a plurality of cores corresponding to the core for performing the actual operation. And each core is independently responsible for the function of performing various calculations using the raw current data and the raw voltage data, the function of analyzing the raw data, and the function of calculating power using various data output by the raw data calculation. can do.

The data analysis unit 1130 receives raw data on the bus and branch currents and the bus voltage from the display module communication unit 1140 and analyzes them. Raw data may include instantaneous values. When the data analysis unit 1130 receives the instantaneous value as raw data, the pattern of the instantaneous value may be analyzed, and the type of load, the state of the load, and the presence or absence of an abnormality may be predicted using the analysis result.

The raw data operation unit 1130 receives raw data on the bus voltage, bus and branch currents received from the voltage measurement module 1200 and the current measurement and power display module 1300 from the display module communication unit 1140, and the raw data Use to calculate data related to various currents and voltages, such as an average value or an RMS value, and output the data.

The display module communication unit 1140 receives the raw data of the bus voltage from the voltage measurement module 1200 and the raw data of the bus and at least one branch line current from the current measurement and power display module 1300. Then, the display module communication unit 1140 receives voltage data from the voltage measurement communication unit 1230 of the voltage measurement module 1200, and receives current data from the current measurement communication unit 1330 of the current measurement and power display module 1300. In order to perform the multi-drop serial communication, such as RS-485 communication with the voltage measurement communication unit 1230 and the current measurement communication unit 1330, Ethernet communication used in a ring network or a computer network is performed. .

The display device 1150 receives data on various electric powers, for example, active powers and reactive powers, and apparent powers from the power operation unit 1110 and displays corresponding values.

The external interface 1160 serves to connect the server 2000 to the power calculation and power display module 1100. The external interface 1160 may be implemented as an Ethernet card for LAN or WAN connection.

In addition, the connected server 2000 functions as a backup server that stores and stores current data, voltage data, and various power data corresponding to RMS values from raw data.

The voltage measurement module 1200 includes a voltage sensing unit 1210, a voltage source data collection unit 1120, a voltage measurement communication unit 1230, and a display device 1240. The voltage measurement module 1200 senses the voltage of the bus using each component, collects the voltage raw data obtained through the sensing, and calculates the raw data through the voltage measurement communication unit 1230, the power calculation and display module 1100 To send. In addition, the voltage measurement module 1200 may display a value corresponding to the voltage data received from the power calculation and display module 1100 through the display device 1240.

The voltage sensing unit 1210 includes a voltage sensor 1211 and an ADC 1212. As the voltage sensor 1211, a resistance attenuation or a PT (Potential Transformer) may be used. The voltage sensing unit 1210 collects the voltage values of the bus or branch lines in the form of analog data, and digitally converts them to the voltage raw data collection unit 1220. The voltage raw data collection unit 1220 receives raw digital data for a voltage value, and transmits the raw digital data to the voltage measurement communication unit 1230. Then, the voltage measurement communication unit 1230 transmits the received raw digital data to the power calculation and power display module 1100.

Synchronized voltage signals and current signals are used for sensing current and voltage. For synchronization of the current signal and the voltage signal, the power operation and power display module 1100 generates a synchronization signal, and the voltage measurement module 1200 and the current measurement and power display module 1300 generate a current signal according to the generated synchronization signal. Alternatively, a voltage signal is sensed.

In addition, the voltage measurement module 1200 and the current measurement and power display module are characterized in that raw data is obtained using the input current and / or the input voltage from which harmonics are removed using a low-pass filter. The input current and voltage used for current and voltage sensing may include noise components, for example, harmonic components. Accordingly, the power measurement system 1000 may include a low-pass filter, for example, a zero cross filter and a line filter, to remove harmonics for input current and input voltage.

The current measurement and power display module 1300 includes a current sensing unit 1310, a current raw data collection unit 1320, a voltage measurement communication unit 1330, and a display device 1340. In addition, the current sensing unit 1310 includes a current sensor 1311 and an ADC 1312.

The current sensor 1311 converts the input analog current signal into a signal suitable for measurement. Shunt resistor, CT, clamp-on sensor, etc. may be used as the current sensor 1311 according to the current value or purpose to be measured.

The current sensing unit 1310 collects the current values of the bus or branch lines in the form of raw analog data, and digitally converts them to the current raw data collection unit 1320. The current raw data collection unit 1320 receives raw digital data for the current value, and transmits the raw raw data to the current measurement communication unit 1330. And the current measurement communication unit 1330 transmits the received raw digital data to the power calculation and power display module 1100.

According to an embodiment of the present invention, the voltage measurement module 1200 and the current measurement and power display module 1300 collect voltage values or current values in the form of raw data according to a sampling method. Here, the raw data may correspond to an instantaneous value. The collected raw data is transmitted to the power calculation and power display module 1100 before performing an operation for obtaining an RMS value or an average value. In addition, an operation for obtaining an RMS value or an average value using raw data may be performed by the power calculation and power display module 1100.

The current data collected from the current measurement and power display module 1300 provided for each branch line is transmitted to the power calculation and power display module 1100 in the form of raw data, and the transmitted current data is the power calculation and power display module 1100 Since it is collected by), current data related to the bus bar may be collected through summation of current data of all branch lines, even if not separately collected.

As described above, according to an embodiment of the present invention, according to the present invention, by using raw data on current and voltage, data pattern analysis can be used to predict the usage state, usage, abnormality, and type of load for each load device. .

In addition, various arithmetic processing processes for raw data related to the measured current and voltage can be simplified using a single module.

The above description of the present invention is for illustration only, and those skilled in the art to which the present invention pertains can understand that the present invention can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims rather than the above detailed description, and it should be interpreted that all changes or modified forms derived from the meaning and scope of the claims and equivalent concepts thereof are included in the scope of the present invention. do.

1100: Power calculation and display module
1110: Power computation department
1120: raw data operation unit
1130: data analysis unit
1140: display module communication unit
1150: display device
1160: left interface
1200: Voltmeter module
1300: current measurement and power display module

Claims (8)

A voltage measurement module for transmitting the bus voltage data obtained through the voltage measurement device in the form of raw data, wherein the bus voltage data is an input voltage from which harmonics are removed using a low-pass filter, and the raw data are instantaneous values;
At least one current measurement and power display module that transmits the branch current data obtained through the current measurement device in the form of raw data-the branch current data is an input current from which harmonics are removed using a low-pass filter, and the raw data is Instantaneous value;
It includes the power calculation and power display module for receiving the raw data about the voltage and current, and using it to calculate the power of the bus and branch lines,
The power calculation and power display module further comprises a data analysis unit that analyzes the pattern of the instantaneous value, which is the raw data over time, and analyzes the usage state, usage, abnormality, and type of load for each load device. Measurement system. The method according to claim 1,
The power calculation and power display module,
Power measurement system, characterized in that for calculating the bus current data using the current data transmitted from the entire current measurement and power display module. delete delete The method according to claim 1,
The power calculation and power display module,
Power source measurement system, characterized in that using the raw data to calculate the RMS value of the bus voltage and branch current, the current and voltage data related to the RMS value to the current measurement and power display module. delete The method according to claim 1,
The power measurement system,
Power measurement system characterized in that it further comprises a respective circuit breaker for the power cut off of the bus and branch lines to cope with short circuit, short circuit, over voltage and over current according to the current, voltage and power measurement. The method according to claim 1,
The power calculation and power display module,
A power measurement system, characterized by generating synchronization signals to obtain voltage and current data synchronized with each other.

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