KR101606031B1 - Power quality measurement device and system based on separate phase measuring module - Google Patents

Abstract

The present invention relates to a power measurement apparatus and system, and more particularly, to a power measurement apparatus and a power measurement system, And a current and voltage measuring sensor for measuring current and voltage flowing through the busbar; A data processing module for deriving power information using data measured through the current and voltage measuring sensor; And a measurement module unit including a communication module for communicating with an external module or another power measurement device, wherein the measurement module unit is partly or wholly detachably coupled to the inside of the hole of the mechanical unit, As shown in Fig.
According to the present invention, there is provided a separate measuring power measuring apparatus and system according to the present invention. The measuring and modulating unit includes a current and voltage measuring sensor, a data processing module, and a communication module for each phase. The voltage and current can be measured using the same module irrespective of the circuit conductance by separately measuring the voltage and current and implementing it through the digital signal processing in accordance with the circuit line method to separately calculate the phase voltage. And the power quality and interference cancellation of each phase can be performed for each phase by using digital signal processing.
According to another aspect of the present invention, there is provided a power measurement system including a phase measurement module, a control board, a host panel, and an external server, wherein the communication module of the phase measurement module, The communication module of the initial power measurement device and the communication module of the last power measurement device communicate with each other in a control communication manner and any one of the communication modules The communication of the storage transfer method is performed by changing the direction of the data communication automatically so that the communication of the storage transfer method is performed in the other direction.

Description

[0001] POWER QUALITY MEASUREMENT DEVICE AND SYSTEM [0002] BASED ON SEPARATE PHASE MEASURING MODULE [0003]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power quality measuring apparatus and system, and more particularly,

Electric power refers to electric energy supplied to an electric device for a unit time or electric energy converted into another type of energy for a unit time. The electric power is represented by P, which is the first letter of Power, and the electric power (P) The relation of the current (I) satisfies P = V x I. The electrical energy supplied by the alternating current is expressed as the average power divided by the period, usually the power supplied during one period, since the current and the voltage continuously change. Such power, voltage, and current amount are measured for various purposes in an electric device as well as an electricity consumption measurement in a real life. Various power measurement devices are being developed and used as measurement devices.

Such a power measuring device is configured to penetrate a subject wire or a bus bar, and is equipped with a power or voltage measuring sensor or the like fixedly mounted on a mechanism through which a bus bar or the like is penetratedly connected. As the measuring sensor, (See, for example, Patent Application No. 10-2004-0051360, No. 10-2007-0095919). For example, in the case of a single phase, to measure the voltage between two phases, the voltage should be measured by placing an analog voltage sensor between two wires or a bus bar, In order to measure the line-to-line or phase voltage, separate analog circuits must be added and measured. However, in the conventional power measuring device generally used, in order to measure the voltage of single-phase or three-phase, all the wires or bus bars to be measured are connected to one device so that the measuring part such as the measuring sensor, There is a problem that it is necessary to separately manufacture a measuring instrument according to the rated or circuit type (single phase, three-phase three-wire type, three-phase four-wire type).

However, if the voltage of each phase can be measured individually using ADC (Analog To Digital Converters) and the voltage between phases can be measured using digital signal processing, the degree of systematic freedom of the system becomes very high. In order to communicate these measurement devices, a conventional bus type is used. At the same time, since all the modules can not transmit data, there are limitations on the communication distance and the communication speed. However, You can use these storage constraints to solve these constraints.

Nevertheless, various studies have been made on the measurement sensor and the measurement method in the power measuring device, but there is no example in which the voltage or current is separately measured and processed by digital signal processing only.

The present invention has been proposed in order to solve the above-mentioned problems of the previously proposed methods, and includes a phase measurement module unit including a current and voltage measurement sensor, a data processing module, and a communication module for each phase, Each phase is independently measured, and it is realized by digital signal processing according to the circuit line method, so that voltage and current can be measured using the same module irrespective of the circuit line by separately calculating the phase voltage. It is another object of the present invention to provide a phase-separated power measuring apparatus and system capable of measuring the current for each phase and performing power quality and interference cancellation for each phase using digital signal processing.

According to another aspect of the present invention, there is provided a power measurement system including a phase measurement module, a control board, a host panel, and an external server, wherein the communication module of the phase measurement module, The communication module of the initial power measurement device and the communication module of the last power measurement device communicate with each other in a controlled manner, and any one of the communication modules The communication module is configured to perform communication in the other direction by changing the data communication direction automatically when a communication error occurs in the communication module of the communication module, It is another object of the present invention to provide a separate power measurement device and system. The purpose.

According to an aspect of the present invention,

As the separated power measurement device,

A mechanism part capable of measuring the voltage and current of the bus bar in each phase;

A current and voltage measuring sensor for measuring a current and a voltage flowing in the bus bar; A data processing module for deriving power quality information using data measured through the current and voltage measurement sensor; And a measurement module configured to include an external module or a communication module communicating with another power measurement device,

Wherein the measurement module unit comprises:

The present invention is characterized in that the power quality is measured irrespective of the circuit conductance by measuring the real-time waveform of the voltage and current by the contact or non-contact method and exchanging the digital signal with one or more adjacent measurement module units.

Preferably, the mechanism portion includes:

A rectangular pillar shape with a through hole therein,

And the measurement module may be inserted into the lower part.

Preferably, the current and voltage measurement sensor comprises:

A current sensor fixed to the bus bar at a predetermined distance when the measurement module is coupled to the mechanical part; And

And a metal piece fixedly provided on the bus bar when the measurement module is coupled to the mechanical part by a predetermined amount.

Advantageously, the data processing module further comprises:

The power and power quality information may be derived using the data measured by the voltage and current measurement sensor and the calibration may be performed on the influence of the magnetic field of the busbar.

Advantageously, the data processing module further comprises:

And can be configured to detect disconnection and tripping of the circuit through contact-type voltage measurement.

Advantageously, the data processing module further comprises:

It can be configured to separately measure the N phase current in addition to the R / S / T phase in the 3-phase 4-wire type.

Advantageously, the data processing module further comprises:

Real-time current and voltage waveforms can be used to measure power quality such as power, active power, reactive power, power factor, current harmonics, voltage harmonics, phase unbalance, and arc sensing.

Preferably, the external module communicating with the communication module comprises:

And a control board provided in the switchboard or the distribution board, connected to the power measuring device, and collecting and transmitting the power information to a host panel communicating with an external server.

Advantageously, the communication module further comprises:

And may be configured to transmit data from a communication module of the power measuring device to a communication module of another power measuring device according to a store and forward communication method.

According to another aspect of the present invention,

1. A power measurement system,

4. The multi-module power measurement device of claim 1,

A control board communicating with the plurality of power measuring devices to collect and store power information measured or derived by the power measuring device; And

And an external server for receiving the power information from the control board.

Preferably,

And a host panel communicating with the control board to receive the collected power information,

The external server may be configured to receive the power information from the host panel.

Preferably, the control board includes:

And a power supply module for supplying power to the power measurement device and the host panel, and a module for providing a synchronization signal to the individual phase-by-phase measurement-type separation-type power measurement device.

Preferably, the communication module of the power measuring device includes:

The communication module of the power measuring device transmits data according to a store and forward communication method with predetermined directionality to a communication module of another power measuring device,

The communication module of the initial power measurement device and the communication module of the last power measurement device communicate with the control board,

When a communication error occurs in any one of the communication modules, the data communication direction may be automatically changed so that the storage communication is performed in the other direction.

According to the present invention, there is provided a separate measuring power measuring apparatus and system according to the present invention. The measuring and modulating unit includes a current and voltage measuring sensor, a data processing module, and a communication module for each phase. The voltage and current can be measured using the same module irrespective of the circuit conductance by separately measuring the voltage and current and implementing it through the digital signal processing in accordance with the circuit line method to separately calculate the phase voltage. And the power quality and interference cancellation of each phase can be performed for each phase by using digital signal processing.

According to another aspect of the present invention, there is provided a power measurement system including a phase measurement module, a control board, a host panel, and an external server, wherein the communication module of the phase measurement module, The communication module of the initial power measurement device and the communication module of the last power measurement device communicate with each other in a control communication manner and any one of the communication modules The communication of the storage transfer method is performed by changing the direction of the data communication automatically so that the communication of the storage transfer method is performed in the other direction.

FIG. 1 is a diagram illustrating a configuration of a power measurement apparatus for a separate type power measurement apparatus according to an embodiment of the present invention. FIG.
FIG. 2 is a diagram illustrating a configuration of a measurement module unit of a differential measurement power module according to an embodiment of the present invention. FIG.
3 is a perspective view of a differential measurement module separate power measurement apparatus according to an embodiment of the present invention.
4 shows an example of a single phase phase voltage measurement;
5 shows an example of a three-phase three-wire type phase voltage measurement;
6 is a diagram showing an example of communication between modules.
FIG. 7 is a diagram illustrating a configuration of a differential measurement module separate power measurement system according to an embodiment of the present invention; FIG.
FIG. 8 is a diagram illustrating a separate measurement module separate power measurement system according to an embodiment of the present invention. FIG.
FIG. 9 is a view illustrating a control board in a differential measurement module separate power measurement system according to an embodiment of the present invention; FIG.
10 is a view showing communication with a phase-separated type measurement module, a synchronization signal, and power supply in a phase-difference measurement module separate-type power measurement system according to an embodiment of the present invention.
11 is a view illustrating a host panel in a differential measurement module separate power measurement system according to an embodiment of the present invention.
12 is a view showing an example of data communication of a power measurement device and a control board in a differential measurement module separation type power measurement system according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. In the following detailed description of the preferred embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The same or similar reference numerals are used throughout the drawings for portions having similar functions and functions.

In addition, in the entire specification, when a part is referred to as being 'connected' to another part, it may be referred to as 'indirectly connected' not only with 'directly connected' . Also, to "include" an element means that it may include other elements, rather than excluding other elements, unless specifically stated otherwise.

FIG. 1 is a diagram illustrating a configuration of a differential measurement module separate power measurement apparatus according to an embodiment of the present invention. Referring to FIG. 1, the differential measurement module separation type power measurement apparatus according to an embodiment of the present invention includes a mechanical part 100, a current and voltage measurement sensor 210, a data processing module 220, a communication module 230 And a measurement module unit 200 including the measurement module 200.

The mechanical unit 100 may include a bus bar through-hole 110 formed in a vertically raised column and having a cross-shaped through-hole for a power measurement target bus bar. The mechanism unit 100 fixes the bus bar and plays a role to make the bus bar contact with the current and voltage measurement sensor 210 of the measurement module unit 200 (e.g., during voltage measurement) or non-contact (e.g., during current measurement) can do.

FIG. 2 is a diagram illustrating a configuration of a measurement module unit of the differential measurement power module according to an exemplary embodiment of the present invention. Referring to FIG. 2, the measurement module unit 200 includes a current and voltage measurement sensor 210 for measuring the current and voltage flowing through the bus bar, and power information using data measured through the current and voltage measurement sensors. And a communication module 230 for communicating with an external module or another power measurement device.

The current and voltage measurement sensor 210 includes a current sensor (hall sensor) and a measurement module unit 200 that are fixedly provided at a predetermined distance from the bus bar when the measurement module unit 200 is coupled to the mechanical unit 100, 100), and a metal piece (voltage measurement) fixedly provided in contact with the bus bar for a predetermined portion. Since the Hall sensor can measure current in a non-contact manner and can measure a voltage by connecting a part of the metal part, the Hall sensor and the metal piece can be connected to the lower end of the measurement module unit 200 So that the measurement sensor itself can be detached and replaced together. The specific configuration of the mechanical part 100 and the measurement module part 200 will be described in detail below with reference to FIG.

FIG. 3 is a perspective view of a differential measurement module separation type power measurement apparatus according to an embodiment of the present invention. As shown in FIG. 3, the differential measurement module separable type power measurement apparatus according to an embodiment of the present invention includes a measurement module unit 200, which is partly or entirely detachably installed in the through hole of the mechanism unit 100 And can be configured to have a hot-wire replacement function. Phase, three-phase, three-phase, four-wire type circuit can be measured by using the same module regardless of the rating different from the conventional products, Can be replaced.

According to an embodiment of the present invention, a plurality of power measuring apparatuses may be sequentially provided, and the mechanical unit 100 may have a rectangular column shape, and the measurement module unit 200 may include a T- Shaped measurement module section may be configured such that the leg section of the measurement module section is inserted into the upper part of the rectangular column having the through hole. However, such a configuration may be applied to one embodiment, in which the bus bar 1000 is coupled to the mechanical part 100, and a part (or all of the measurement module part 200) of the measurement module part 200 is inserted into the through- May be inserted into the bus bar 1000 to be partially in contact with the bus bar 1000 (metal piece or the like).

The data processing module 220 may be operable to derive power and power quality information using voltage and current measurement data. The data processing module 220 may include a bus bar (not shown) coupled to a temperature in the measurement module 200, 1000 may be calibrated such as interference cancellation. Specifically, the voltage and current data measured by the device are received from another adjacent power measuring device through the communication module 230, and the voltage and current measurement data measured by the current and voltage measuring sensor 210 are calculated to calculate the power The phase voltage and the phase current necessary for the measurement are derived, and the power and power quality information can be derived using the phase voltage and the phase current. Fig. 4 is a diagram showing an example of a single-phase voltage measurement, and Fig. 5 is a diagram showing an example of a three-phase three-wire type phase voltage measurement. As shown in FIGS. 4 and 5, the data processing module 220 may receive voltage and current information from an adjacent measurement module unit 200 (measurement module) to obtain respective phase voltages. When the voltage and current measurement data calculated by the adjacent data processing modules are present, the automatic data selection function can be performed using the data.

The measurement module unit 200 may be configured as one group according to a circuit connection such as a single-phase, three-phase three-wire, or a three-phase four-wire type. It can be arbitrarily set by firmware.

As shown in FIG. 3, a plurality of electric power measuring devices may be provided in the interior of the switchboard. In this case, the electric power measuring device is affected by the magnetic field due to the current flowing in the bus bar 1000 coupled with the adjacent electric power measuring device . By calibrating the interference problem in the data processing module 220, more accurate data derivation becomes possible.

The communication module 230 can communicate with the communication module 230 in an external module or another power measuring device. Communication with the communication module 230 in another power measuring device facilitates elimination of current interference and the like. The external module may be a control board provided in the switchboard or the distribution panel, connected to the power measuring device, and collecting and transmitting power information to a host panel communicating with an external server.

6 is a diagram showing an example of communication between modules. As shown in FIG. 6, according to an embodiment of the present invention, data is transmitted from a communication module 230 of a power measuring apparatus to a communication module 230 of another power measuring apparatus according to a store and forward communication method. . By adopting such a configuration, a ring type connection structure to be described in connection with a future power measurement system becomes possible.

FIG. 7 is a diagram illustrating a configuration of a differential measurement module separate power measurement system according to an embodiment of the present invention. Referring to FIG. 7, the differential measurement module separation power measurement system according to an embodiment of the present invention includes a phase separated module power measurement device 10, a control board 20 and / or a host panel 30, An external server 40, and the like. The measurement module for separated power measurement 10 is similar to that described above with reference to Figs. 1 to 6, and thus a detailed description thereof will be omitted.

FIG. 8 is a diagram illustrating a separate-type measurement module separate power measurement system according to an embodiment of the present invention. As shown in FIG. 8, a plurality of power measurement devices 10 are provided in a ring type, and the power measurement devices 10 can communicate with each other. And a configuration in which the power measurement device is connected to the control board 20 can be adopted. In other words, data can be transmitted to the control board 20 by using the communication between the measuring devices 10 without the communication to the separate control board 20 except for the first and last power measuring devices. The control board 20 communicates with the host panel 30 or the external server 40 and the host panel 30 can communicate with the external server 40 using Ethernet, RS485, RS232C, or the like. According to an embodiment, a battery for a black box function may be provided to store accident data in case of a power failure.

The control board 20 can communicate with a plurality of power measurement devices 10 (modules) to collect, store, and transmit the power information measured or derived by the power measurement device 10. FIG. 9 is a view illustrating a control board in a differential measurement power module according to an exemplary embodiment of the present invention. Referring to FIG. As shown in FIG. 9, the control board 20 can communicate data with the power measuring device 10 (module) in a clockwise or counterclockwise direction according to a storage delivery method with a predetermined directionality. In addition, the sampling and synchronization signals can be communicated to the power measurement device (10, module) and also to the host panel (30). Preferably, the power measuring device 10 (module) and the power supply module 21 (power supply control) for supplying power to the host panel 30 may be included. This power supply module (21, power control) allows the system to save time for storing the accident data for a predetermined time in order to save the accident record in case of a power failure, and additionally has a black box function Can be added.

In addition, the control board 20 may include circuitry for precise clock generation as illustrated in FIG. Since the precision clock is installed only on the control board 20 and the measurement module unit 200 performs measurement using the precision clock, the number of expensive precision clock devices can be reduced. 10 is a diagram illustrating communication with a phase-separated type measurement module, a synchronization signal, and power supply in the phase-difference measurement module separation-type power measurement system according to an embodiment of the present invention.

The host panel 30 can receive the collected power information by communicating with the control board 20 and can communicate with the external server 40 through the Internet or the like. The external server 40 may mean a power management server or the like that receives power information from the host panel 30. [ 11 is a view illustrating a host panel in a differential measurement module separate power measurement system according to an embodiment of the present invention. As shown in FIG. 11, according to an embodiment of the present invention, the host panel 30 may further include a display screen (LCD panel), through which the measured and derived data may be displayed. According to an embodiment, the external server 40 may receive power information from the control board 20. In this case, the configuration of the host panel 30 may be omitted.

12 is a diagram illustrating an example of data communication between the power measurement device and the control board in the differential measurement module separate power measurement system according to an embodiment of the present invention. As shown in FIG. 12, data is transmitted from the communication module 230 of the power measuring device 10 to the communication module of another power measuring device according to a store and forward communication method with a predetermined direction, The communication module of the initial power measurement device and the communication module of the last power measurement device communicate with the control board 20 and automatically change the data communication direction when a communication error occurs in any of the communication modules (Ring Type Connection) so that communication in a storage transfer manner is performed in the other direction. According to the unidirectional connection as in the prior art, since some of the devices fail, communication of the subsequent devices becomes impossible. In the present invention, by adopting the above-mentioned Ring Type Connection, even when a specific device fails in the middle, It becomes possible to access other devices except the device.

The present invention may be embodied in many other specific forms without departing from the spirit or essential characteristics of the invention.

10: Measuring module for each phase Separate power measuring device
20: Control board
21: Power supply module 30: Host panel
40: external server 100:
110: Bus bar through hole 200: Measurement module part
210: current and voltage measurement sensor 220: data processing module
230: Communication module 1000: Bus bar

Claims (13)

1. A power measurement system,
Separate type power measurement device with different measurement module;
A control board communicating with a plurality of the power measurement devices to collect, store, and transmit the power quality information measured or derived by the power measurement device; And
And an external server for receiving the power quality information from the control board,
The differential measurement module separable type power measurement device comprises:
A mechanism part capable of measuring the voltage and current of the bus bar in each phase; And
A current and voltage measuring sensor for measuring a current and a voltage flowing through the bus bar, a data processing module for deriving power quality information using data measured through the current and voltage measuring sensor, and an external module or another power measuring device And a measurement module unit including the communication module,
The measurement module unit measures a real-time waveform of a voltage and a current by a contact or a non-contact method, and sends and receives a digital signal to at least one adjacent-to-adjacent measurement module unit,
And a host panel communicating with the control board to receive the collected power quality information,
Wherein the external server receives the power quality information from the host panel.
The apparatus according to claim 1,
A rectangular pillar shape with a through hole therein,
And the measurement module is inserted into a lower portion of the measurement module.
The apparatus of claim 1, wherein the current and voltage measurement sensor comprises:
A current sensor fixed to the bus bar at a predetermined distance when the measurement module is coupled to the mechanical part; And
And a metal piece fixedly mounted on the booth bar by a predetermined portion when the measurement module is coupled to the mechanical unit.
The data processing system according to claim 1,
Wherein the power and power quality information is derived by using the data measured by the voltage and current measuring sensor and the calibration for the influence of the magnetic field of the booth bar is performed.
The data processing system according to claim 1,
Wherein the circuit breakage and tripping are detected through contact type voltage measurement.
The data processing system according to claim 1,
Wherein the N phase current is individually measured in addition to the R / S / T phase in the three-phase four-wire type.
The data processing system according to claim 1,
Wherein the real-time current and voltage waveforms are used to measure power quality such as power, active power, reactive power, power factor, current harmonics, voltage harmonics, phase unbalance, arc detection, and the like.
2. The communication system according to claim 1, wherein the external module communicating with the communication module comprises:
Wherein the control unit is a control board provided in an electric distribution board or a distribution board, connected to the power measurement apparatus, and collecting and transmitting the power quality information to a host panel communicating with an external server.
The communication system according to claim 1,
Wherein the data is transmitted from a communication module of the power measuring device to a communication module of another power measuring device according to a store and forward communication method.
delete delete The apparatus of claim 1,
And a power supply module for supplying power to the power measurement device and the host panel, and a module for providing a synchronization signal to the individual phase separated power measurement device.
The power measuring apparatus according to claim 1,
The communication module of the power measuring device transmits data according to a store and forward communication method with predetermined directionality to a communication module of another power measuring device,
The communication module of the initial power measurement device and the communication module of the last power measurement device communicate with the control board,
Wherein when a communication error occurs in any one of the communication modules, communication in a storage transfer mode is performed in a different direction by automatically changing a data communication direction.

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