KR101713076B1 - Measuring value and operating state indicating system for protection function of protective relay - Google Patents

Abstract

The present invention relates to a protection relay management system which processes a set input value and a detected measurement value by using a visual interface and easily checks a relationship between an input value and the measured value. In order to solve the above problem, a system for indicating the protection element measurement value and the operation state display system of a power equipment protection relay according to the present invention receives a measurement value detected in power equipment, converts the measurement value into a digital signal value, controls the display of inputted data and the digital signal value on a visualized graph, and stores and manages the visualized graph.

Description

[0001] DESCRIPTION [0002] Measuring values and operating state indicating systems for protection elements of power equipment protection relays [

The present invention relates to a protection element measurement value and an operation status display system of a power equipment protection relay, and more particularly, to a system and method for processing a measured input value and a detected measurement value by a visual interface, The present invention relates to a protection element measurement value and an operation status indication system of a power facility protection relay.

Buildings, factories, ships and the like are equipped with a power transmission and distribution panel that receives electricity supplied from a power company or a self-generator and distributes the power to each load.

In this case, the switchgear is to reduce the pressure of high-voltage or extra-high-voltage electricity according to the purpose of use, to supply the load to each load, and to automatically shut off when an abnormality such as overload or disconnection occurs. Sized cubicles. Inside the cubicle, various relay devices (protection relays) such as transformer, power meter, video transformer, ammeter, voltmeter, etc. are installed along with various circuit breakers and protective devices such as switches, transformers, parking shorts, condensers, wiring breakers, power fuses and lightning Respectively.

In order to supply the high pressure or special high voltage, the switchgear is equipped with a special high pressure water level (LBS), a meter transformer (MOF), a meter transformer (PT) A transformer with a transformer for converting high-voltage electricity to low pressure, and a low-voltage power unit for distributing low-voltage electricity to each load.

In this case, the low-voltage power unit distributes the low-voltage electricity supplied from the transformer to each load and prevents an overcurrent from flowing. The unit includes a unit such as a circuit breaker or a protective relay installed inside the cubicle, And a conductor (Busbar, Cable) connected to the cable.

Here, the protection relay installed in the switchgear is a device that detects breakdowns of various loads and sends a shutoff signal to the breaker. It monitors the components of the transmission and distribution lines and other power systems at all times, and when a fault occurs, It is an electric device that immediately detects and operates it to isolate faulty parts to ensure smooth power supply or to minimize damage to the facility.

It is very difficult for general electric power plant operators to accurately grasp and understand each protection factor in order to understand the protection system configuration, function setting and correction.

As one of techniques for confirming the operation of the protection relay by voice, Japanese Patent Application Laid-Open No. 10-1606704 discloses a switchboard having a live-line display device and a protective relay-operated voice alarm device.

The above-mentioned technology monitors the temperature change due to deterioration of various electrical apparatuses installed in the switchboard in real time through the temperature detection of the bus bar connected to the electric apparatus and informs the manager of the temperature change. In case of abnormality, the outside air is supplied to the inside of the switchboard, Which can reduce the risk of a fire accident such as a fire, and a protection relay operating voice alarm device.

In addition, Japanese Laid-Open Patent Publication No. 10-2016-0041530 discloses a remote monitoring and control apparatus of a protection relay and a method thereof.

The above-described technique includes a control unit for generating control command data for controlling a protection relay based on input data input through a smart terminal of a manager at a remote location; A signal processing unit for generating a test signal for testing the protection relay based on the generated control command data; A signal converter for compressing and converting the generated test signal; And a communication unit for transmitting the compressed and converted test signal to the protection relay and receiving test result data transmitted from the protection relay.

The above-mentioned conventional techniques have an advantage in that the operation of the protection relay can be output by voice according to the occurrence of abnormality of the switchboard and the remote control of the protection relay can be controlled. However, the setting values inputted to operate the protection relay and the state of the switchboard There is a problem that the degree of margin for the detected difference of the measured values can not be confirmed.

In addition, it is difficult for each protection relay element protected by the protection relay to identify the operation state or measurement state of the protection relay element without using a dedicated program, and it is difficult to identify the relationship between the set values and the measured values It is very difficult to understand.

In addition to this, in case of failure analysis by using the data recorded in the protection relay when the protection relay is operated due to the failure of the power equipment as well as the operation state of the protection relay element of the operating equipment, Understanding how it worked in the protective relay element also presents a very difficult problem.

KR 10-1606704 B1 (March 22, 2016) KR 10-2016-0041530 A (Oct. 18, 2016)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art described above, and it is an object of the present invention to provide a display apparatus and a display apparatus capable of displaying a relationship between a set value set in a protective relay and a measured value actually detected, And to provide a system for displaying measured values and operation states of protective elements of power equipment protection relays.

Also, it is an object of the present invention to provide a protection element measurement value and an operation status indication system of a power facility protection relay, which can easily understand the characteristics of a protection relay and the failure analysis of the operation of the protection relay even if there is no expert knowledge on various protection relays .

In order to solve the above problems, the protection element measurement value and operation state display system of the power facility protection relay according to the present invention receives measured values detected in a power facility, converts the measured values into digital signal values, Data and the digital signal value are displayed, and the visualized graph is stored and managed.

The protection factor measurement value and the operation state indication system of the power facility protection relay include a signal input unit receiving the measurement value detected by the power equipment; A signal processing unit for converting the measurement value received from the signal input unit into a digital signal value; A selection unit for selecting a protection relay; A data input unit for setting parameters for the protection relay; An operation unit for controlling the data input through the data input unit and the digital signal value processed by the signal processing unit to be displayed on a graph visualized corresponding to the protection relay selected by the selection unit; A screen display unit for displaying the visualized graph under the control of the operation unit; And a data storage unit in which the parameters of the protection relay input through the data input unit and the visualized graph in which the protection element is input are stored and managed.

 Here, the visualized graph is composed of a horizontal axis and a vertical axis with respect to the protection relay element of the protection relay.

The selection unit is characterized in that a selectable protective relay is indicated by an icon.

Also, the operation unit may cause the input / output state interface, which is arranged in time series, to be displayed on the screen display unit according to an input value and an output value of the selected protection relay.

According to the present invention, it is possible to visually confirm the operation state of each protection relay element in the protection relay provided in the electric power facility, so that even if there is no expert knowledge, the characteristics of the protection relay and the degree of danger of the detected measurement value can be easily grasped There are advantages to be able to.

In addition, since the operation cause of the protection relay in the event of failure and the location of the failure can be easily confirmed, there is an advantage that the failure can be recovered quickly.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a protection element measurement value and operation state indicating system of a power equipment protection relay according to the present invention. FIG.
FIGS. 2A and 2B illustrate an initial screen interface according to an embodiment of the present invention applied to a protection element measurement value and an operation status display system of a power equipment protection relay according to the present invention. FIG.
FIGS. 3A and 3B illustrate a protection relay element interface according to an embodiment of the present invention, which is applied to a protection element measurement value and an operation status display system of a power facility protection relay. FIG.
FIG. 4 is a visualization interface for a protection relay element applied to a protection element measurement value and an operation status display system of a power equipment protection relay according to the present invention.
5 to 8 are visualization interfaces for protective relay elements applied to the protection element measurement values and the operation status display system of the power equipment protection relay according to the present invention, respectively.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a protection relay management system configured to process a set input value and a detected measurement value using a visual interface and display the same, thereby easily confirming a relationship between an input value and a measured value.

FIG. 1 is a block diagram of a protection element measurement value and an operation state indicating system of a power equipment protection relay according to the present invention.

1, the protection element measurement value and operation status display system of the power facility protection relay according to the present invention includes a signal input unit 100, a signal processing unit 200, a selection unit 300, a data input unit 400, An operation unit 500, a screen display unit 600, a data storage unit 700, and a communication unit 800.

The signal input unit 100 receives the measurement values detected by the power equipment. The measurement values detected by the power equipment include a protection relay installed in a power facility, a PT, a meter transformer CT ), A circuit breaker, a measuring device, and the like, and the detected value may be input in real time or may be configured to receive and receive data recorded in the protection relay.

At this time, the measuring device may include a watt hour meter, a reactive power meter, a power factor meter, a frequency meter, an image ammeter, an image voltmeter, and a thermometer.

That is, the measurement value received through the signal input unit 100 may be composed of overall data generated while the power equipment is operated, and the measurement value may be received through the wired / wireless Internet network or the communication network.

The signal processing unit 200 converts the measurement value received from the signal input unit 100 into a digital signal value.

That is, the signal processing unit 200 receives the measurement value output from the signal input unit 100, converts the measurement value into a digital signal value that can be processed by the operation unit 300, and outputs the digital signal value.

In the case of a protection relay for outputting a digital signal, the signal processing unit 200 is configured to bypass the input digital signal value.

The selection unit 300 is for receiving and inputting a protection relay of a target to be measured or an operation status of a protection element, and displays the protection relay configured in the electric power facility so that the protection relay can be selected from the displayed protection relays. Lt; / RTI > In addition, the selectable protective relay can be indicated by an icon.

At this time, the selectable protection relays may be limited to those provided in the power facility, and the protection relays not provided in the power facility may not be selected.

Here, the protective relays that are displayed include a distance relay, an overcurrent relay, a synchronous relay, a low voltage relay, a reverse power relay, a field loss relay, an unbalanced relay, a reverse phase voltmeter, a transient overcurrent relay, a transient overcurrent relay, A relays, a directional overcurrent relay, a synchronous anti-skid prevention relay, and a ratio differential relay, but the present invention is not limited thereto.

In addition, the selection unit 300 may be displayed on the screen display unit 600 and may be configured to be selected by touch. In addition, the protection relay operated in the protection relay displayed on the screen display unit 600 may be configured to be identifiable.

It is preferable that the operated protection relay is configured such that the measured value is received in the operation range of the protection element of the protection relay, and the protection relay operated thereon is displayed in a color different from that of the non-operation protection relay.

For example, among the protection relays to be displayed, the operation protection relay may be displayed in orange or red, and the non-operation protection relay may be configured to be displayed in gray or white.

The data input unit 400 performs a function of setting and inputting parameters for the protection relay. Since each protection relay varies depending on the protection element to be protected, the standard of the protection relay, the capacity of the electric power facility, A protective relay of the appropriate standard for the protection of the product shall be used. Therefore, the parameters of the protective relay installed in correspondence with the electric power facility should be set.

Here, the parameters of the protection relay inputted through the data input unit 400 may be composed of a current element, a voltage element, an impedance element, a phase element, and a direction element. The input parameters of the protection relay are stored and managed in the data storage unit 700.

The operation unit 500 may be configured to display the data inputted through the data input unit 400 corresponding to the protection relay selected by the selection unit 300 and the protection factor of the digital signal value processed in the signal processing unit 200, To be displayed. That is, the operation unit 500 performs a function of displaying the data input through the data input unit 400 and the digital signal values processed in the signal processing unit 200 in a visualized graph.

Here, the visualized graph is configured in the form of a graph set in advance according to each of the protection relays, and may be configured as a graph of a horizontal axis and a vertical axis with respect to the protection element of the protection relay.

For example, in the case of Over Current Relay (OCR), the protection factor of a power plant is time and current. This overcurrent relay operates when the overcurrent or overcurrent occurs in the main circuit and the secondary current is detected above the current value of the protection element. The overcurrent relay is divided into one-time element and momentary element, and the elapsed time Lt; / RTI > That is, the horizontal axis of the visualized graph corresponding to the overcurrent relay can be set to the magnitude of the current, and the vertical axis can be set to the time. Similarly, various visualized graphs for each protective relay can be constructed.

The visual display unit 600 displays the visualized graph, the protective relay that can be selected, etc. under the control of the operation unit 500, and can be displayed in a graphical user interface manner.

The data storage unit 700 stores the parameters of the protection relay inputted through the data input unit 400 and the visualized graph in which the protection element is input and stores the operation result in the operation unit 500, do.

The communication unit 800 communicates with an external device. The communication unit 800 may be configured such that the protection element measurement value and the operation status display system of the power equipment protection relay according to the present invention are connected to an external device (e.g., a user terminal device or a management server) Or a protection relay of a power facility, and the like.

2A and 2B are views showing an initial screen interface of an embodiment applied to a protection element measurement value and an operation status display system of a power facility protection relay according to the present invention.

Referring to FIG. 2A, an initial screen interface of an embodiment applied to a protection element measurement value and an operation state indicating system of a power equipment protection relay according to the present invention can be represented by a flowchart of a power reception facility. At this time, the system diagram of the power reception equipment includes various kinds of circuit breakers and protection devices such as switches, transformers, parking breakers, condensers, wiring breakers, power fuses, Various relay apparatuses (protection relays) are displayed, and the relay apparatus (protection relay) is displayed on the protection relay interface 610.

Here, the protection relay interface 610 displays various kinds of protection relays installed in the reception facility.

FIG. 2B is a view showing an initial screen interface according to an embodiment of the present invention in which the protection relay operated in the protection relay is displayed. When the operated protection relay is generated, the protective relay of the protection relay and the protection relay The color of the fault location 611 may be changed and displayed.

Therefore, it is possible to easily grasp the fault section according to the operation of the protection relay as well as the operation of the protection relay.

FIGS. 3A and 3B are diagrams illustrating a protection relay element interface of an embodiment applied to a protection element measurement value and an operation status display system of a power facility protection relay according to the present invention.

At this time, the interfaces of FIGS. 3A and 3B may be configured to be displayed when the protection relay interface 610 of FIGS. 2A and 2B is selected.

Referring to FIG. 3A, the protective relay element interface displays a voltage current instantaneous waveform interface 620, a voltage / current vector interface 630, a protection element interface 640, and the like.

The voltage and current instantaneous waveform interface 620 displays instantaneous waveforms of voltages and currents input to and output from the receiving equipment, and the voltage and current vector interface 630 displays voltage and current corresponding to the voltage and current instantaneous waveform interface 620 A vector is displayed.

The visualized graph of the data inputted through the data input unit 400 and the protection factor of the digital signal value processed by the signal processing unit for each protection relay is displayed on the protection element interface 640, Format.

3A is an interface corresponding to FIG. 2A, and FIG. 3B is an interface corresponding to FIG. 2B. That is, as shown in FIG. 2B, when the operated protective relay exists, the protective relay operated in the protective relay element interface is displayed as shown in FIG. 3B.

FIG. 4 is a diagram illustrating a visualization interface for a protection relay element applied to a protection element measurement value and an operation status display system of a power facility protection relay according to the present invention.

4, the visualization interface for the protection relay element includes a voltage current instantaneous waveform interface 620, a voltage and current vector interface 630, a protection element characteristic curve interface 650, a setting value display interface 660, A measurement value display interface 670, an input / output status interface 680, a timer interface 690, and a protection logic interface 695.

The protective element characteristic curve interface 650 displays a visualized graph in which the set value operation range 651 and the converted digital signal value 652 (measured value) are input. Accordingly, the protection element for the selective protection relay is visually displayed, and the position of the measurement value for the protection element of the selected protection relay can be easily confirmed.

Data input through the data input unit 400 is displayed on the set value display interface 660. That is, the set value operation range of the protection relay is displayed on the set value display interface 660.

The measured value display interface 670 displays the digital signal value converted by the signal processor 200. [

The input / output state interface 680 includes a start point for detecting the operation region (abnormality) of the protection relay with respect to the digital signal value, an operation at which the protection relay is operated, Is displayed. At this time, the input value and the output value may be displayed in a time series order. As a result, the input value and the output value are displayed in a time-series order, so that it is possible to easily confirm when the protection relay detects an abnormality, when the operation is started, and when the trip signal is generated.

The timer interface 690 displays the time from the detection point to the operation point of the protection element of the selected protection relay for the timer set in the data input through the data input unit 400.

The protection logic interface 695 displays the status of the protection logic operated based on the input / output state interface 680. In other words, the detection time of the fault (abnormality), the timer operation state, and the protection element are displayed with the state of the protection logic with respect to the operation, and the activated protection logic can be configured to be displayed in different colors to facilitate identification.

In this case, the information about the visualization interface for the protection relay element may be stored in the data storage unit 700 in a time-dependent manner, and the stored information may be derived and checked as needed.

Therefore, it is possible to confirm the operation according to the temporal flow of the protective relay, and it is possible to check the error of the set input data or the normal operation of the protection relay against the protection relay element in a time-wise manner.

5 to 8 are diagrams showing a visualization interface for the protective relay element applied to the protection element measurement values and the operation status display system of the power facility protection relay according to the present invention, respectively.

FIG. 5 is a visualization interface (a) for a distance relay element and a visualization interface (b) for a distance relay element in the case of a failure in a steady state (healthy state) of an embodiment.

Figure 6 is a visualization interface (a) for the field loss relay element and a visualization interface (b) for the field loss relay element in the event of a failure in the steady state (sound state) of the embodiment.

FIG. 7 is a visualization interface (a) for the rate differential relay element and a visualization interface (b) for the rate differential relay element in the steady state (healthy state) of the embodiment.

Figure 8 is a visualization interface (a) for overcurrent relay elements and a visualization interface (b) for overcurrent relay elements in the event of a fault in a steady state (healthy state) of an embodiment.

Referring to FIGS. 5 to 8, in the event of a failure, the display is displayed with a color added in contrast to a normal state (a healthy state), so that the occurrence of a failure can be easily confirmed.

Each visualization interface includes an instantaneous waveform interface 620, a voltage and current vector interface 630, a protection element characteristic curve interface 650, a setpoint display interface 660, a measured value display interface 670, an input / ), A timer interface 690 and a protection logic interface 695 may be displayed, but some interfaces may be omitted depending on the type of protective relay, that is, the protection factor.

According to the present invention, it is possible to visually confirm the operation state of each protection relay element in the protection relay provided in the electric power facility, so that even if there is no expert knowledge, the characteristics of the protection relay and the degree of danger of the detected measurement value can be easily grasped In addition, since the operation cause of the protection relay and the failure location can be easily confirmed in the event of a failure, there is an advantage that the recovery of the failure location can be performed quickly.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: signal input unit 200:
300: selection unit 400: data input unit
500: Operation unit 600:
610: Protection relay interface 611: Fault location
620: voltage-current instantaneous waveform interface 630: voltage current vector interface
640: Protection element interface 650: Protection element characteristic curve interface
651: Setting value Operating range 652: Digital signal value
660: Setting value display interface 670: Measurement value display interface
680: I / O status interface 690: Timer interface
695: Protection logic interface 700: Data storage unit
800:

Claims (5)

delete A signal input unit receiving the measured values detected by the power equipment;
A signal processing unit for converting the measurement value received from the signal input unit into a digital signal value;
A selection unit for selecting a protection relay;
A data input unit for setting parameters for the protection relay;
An operation unit for controlling the data input through the data input unit and the digital signal value processed by the signal processing unit to be displayed on a graph visualized corresponding to the protection relay selected by the selection unit;
A screen display unit for displaying the visualized graph under the control of the operation unit; And
A data storage unit for storing and managing the visualized graph in which the parameters of the protection relay input through the data input unit and the protection element are input;
Lt; / RTI >
A visualization interface for the protection relay element is displayed on the screen display unit,
The visualization interface for the protection relay element comprises:
A voltage-current instantaneous waveform interface in which an instantaneous waveform of a voltage and a current input to and output from a power facility is displayed;
A voltage and current vector interface in which a vector for voltage and current corresponding to the voltage-current instantaneous waveform interface is displayed;
A protective element characteristic curve interface in which a set value operation range and a converted digital signal value are displayed in a visualized graph and the position of the measured value with respect to the protection element is displayed;
A set value display interface for displaying data input through the data input unit;
A measurement value display interface for displaying the digital signal values converted by the signal processing unit; And
An input / output state interface in which an operation state of a protection relay with respect to the digital signal value is detected, a state in which a protective relay is operated and a trip signal is output;
And,
The visualized graph may include:
And a graph of a horizontal axis and a vertical axis with respect to the protection relay element of the protection relay.
delete The method of claim 2,
Wherein the selection unit comprises:
And the selectable protective relay is indicated by an icon. The protective element measurement value and the operation status display system of the power facility protection relay.
The method of claim 2,
In the input / output state interface,
Wherein a time point at which an operation region of the protection relay with respect to the digital signal value of the selected protection relay is detected, a time point at which the protection relay is operated, and a point at which the trip signal is output are displayed in a time series array. Protection element measurement value and operation status display system.

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