KR102053167B1 - apparatus for monitoring circuit-breaker of Gas insulated switchgear and Method for the same - Google Patents

Abstract

According to an embodiment of the present invention, a gas insulated switchgear blocking unit monitoring method includes a method of analyzing a driving state of a gas insulated switchgear blocking unit in a breaker monitoring unit. Measurement information generation step of measuring the voltage value and the current value of the measurement target to generate the measurement information; An information transmission step of transmitting the measurement information to the blocking unit monitoring unit through a communication network; A driving state analysis step of generating state information by analyzing the driving state of the gas insulation switching device blocking unit using the transmitted measurement information; And an information display step of displaying the state information to the outside.

Description

Gas insulated switchgear breaker monitoring unit and gas insulated switchgear breaker monitoring method {apparatus for monitoring circuit-breaker of Gas insulated switchgear and Method for the same}

The present application relates to a gas insulated switchgear breaker monitoring device and a gas insulated switchgear breaker monitoring method, and in particular, by measuring the voltage and current of the gas insulated switchgear breaker, using the measured voltage and current, etc. The present invention relates to a gas insulated switchgear breaker monitoring device and a gas insulated switchgear breaker monitoring method capable of analyzing an operation state of a gas insulated switchgear breaker.

In recent years, as the industry develops, power consumption increases, and a large amount of power is consumed in a large city or a specific narrow area. Gas insulation devices, which are miniaturized large-capacity power devices, are used in places that consume large amounts of power.

Gas insulated equipment is a device mainly made of SF6 gas as an insulating medium. Recently, a gas insulated switchgear (GIS) has been widely used as a gas insulator.

Gas Insulated Switchgear (GIS) is a transformer complex machine of 170kW or more that applies the excellent physical and electrical properties of SF6, which is an inert gas, to protect the system by safely opening and closing in abnormal conditions such as short-circuit accidents as well as switching current in a normal state. Say the device.

The gas insulation switchgear (GIS) may cause damage to the conductor portion during manufacture, transportation, and assembly, and cracks and conductive foreign substances may occur during operation. Due to such a defect, the gas insulated switchgear (GIS) may be partially discharged to prevent smooth power supply.

In addition, as the electrode distance is shortened due to the miniaturization of the gas insulated switchgear (GIS), the electric field becomes large, and there is a possibility that dielectric breakdown occurs when metal particles are present.

In particular, the investigation result of the breaker failure cause of the gas insulated switchgear (GIS) carried out by the CIGRE SC13 showed that the main cause of the breaker is mechanical rather than electrical. In addition, 37% of the failures were due to malfunction of the driving mechanism, and 11% were due to breakdown of insulation of the main equipment.

In other words, the mechanical failure of the gas insulated switchgear (GIS), in particular the failure mechanism of the breaker portion accounted for the largest proportion of the main causes of failure. Therefore, monitoring and diagnosing the health of the cut-off part is very important in improving the reliability of the gas insulated switchgear (GIS) and reducing the maintenance cost. Therefore, there is a need for a blocking unit monitoring device and a blocking unit monitoring method capable of monitoring a state of a gas insulated switchgear (GIS) blocking unit.

Republic of Korea Patent Publication No. 10-2010-0049413 (2010.05.12.)

The present application measures the voltage and current of the gas insulated switchgear breaker, and the gas insulation switchgear breaker monitoring device that can analyze the operating state of the gas insulated switchgear breaker using the measured voltage and current and the like; The present invention provides a method for monitoring a gas insulated switchgear breaker.

According to an embodiment of the present invention, a gas insulated switchgear blocking unit monitoring method includes: measuring information generation step of measuring a voltage value and a current value of a gas insulated switchgear blocking unit and generating measurement information; An information transmission step of transmitting the measurement information to the blocking unit monitoring unit through a communication network; A driving state analysis step of generating state information by analyzing the driving state of the gas insulation switching device blocking unit using the transmitted measurement information; And an information display step of displaying the state information to the outside.

The driving state analysis step may include an analysis object input step of receiving a measurement object to be analyzed; And an object analyzing step of generating state information by analyzing the measurement information value of the measurement object.

In this case, the state information may include at least one of vector information, a harmonics value, and a deviation value obtained by analyzing the measurement object using the measurement information.

Here, in the information transmitting step, the measurement information may be transmitted using an Ethernet port of a UDP communication protocol and an HNIC communication card.

The method for monitoring a gas insulated switchgear cutout according to an embodiment of the present invention may further include a warning notifying step of notifying when a value included in the state information exceeds a preset reference value.

According to an embodiment of the present invention, a gas insulated switchgear blocking unit monitoring device may include: a measuring unit measuring measurement of a voltage value and a current value of a gas insulated switchgear blocking unit to generate measurement information and transmitting the measured information; An input unit for receiving a measurement object to be analyzed from a user; And a blocking unit monitoring unit generating state information including at least one or more of vector information, harmonics values, and deviation values using the measurement information.

In addition, the solution of the said subject does not enumerate all the characteristics of this invention. Various features of the present invention and the advantages and effects thereof may be understood in more detail with reference to the following specific embodiments.

According to the gas insulated switchgear blocking unit monitoring device and the gas insulated switchgear monitoring unit monitoring method according to an embodiment of the present invention, the measurement value including the voltage, current value measured by the gas insulated switchgear to the external monitoring system Can be.

According to the gas insulation switchgear breaker monitoring unit and the gas insulation switchgear breaker monitoring method according to an embodiment of the present invention, it is possible to analyze the operating state of the gas insulation switchgear breaker.

According to the gas insulated switchgear breaker monitoring unit and the gas insulated switchgear breaker monitoring method according to an embodiment of the present invention, the operation state of the gas insulated switchgear breaker can be notified to the user.

1 is a flowchart of a gas insulated switchgear blocking unit monitoring method according to an embodiment of the present invention.
Figure 2 is a flow chart showing an embodiment of the driving state analysis step of the gas insulation switchgear blocking unit monitoring method according to an embodiment of the present invention.
Figure 3 shows an example of displaying the vector information of the status information in the information display step of the gas insulation switchgear blocking unit monitoring method according to an embodiment of the present invention.
Figure 4 shows an example of displaying the harmonics value of the status information in the information display step of the gas insulation switchgear blocking unit monitoring method according to an embodiment of the present invention.
5 is a block diagram showing the configuration of a gas insulated switchgear cutout monitoring device according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. However, in describing the preferred embodiment of the present invention in detail, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, the same reference numerals are used throughout the drawings for parts having similar functions and functions.

In addition, throughout the specification, when a part is 'connected' to another part, it is not only 'directly connected' but also 'indirectly connected' with another element in between. Include. In addition, the term 'comprising' of an element means that the element may further include other elements, not to exclude other elements unless specifically stated otherwise.

1 is a flowchart of a gas insulated switchgear blocking unit monitoring method according to an embodiment of the present invention.

Referring to Figure 1, the gas insulation switchgear monitoring unit monitoring method according to an embodiment of the present invention measurement information generation step (S10), information transmission step (S20), driving state analysis step (S30) and information display step ( S40) may be included.

Hereinafter, a method for monitoring a gas insulated switchgear blocking unit according to an embodiment of the present invention will be described with reference to FIG. 1.

In the measurement information generation step S10, the voltage value and the current value of the gas insulated switchgear blocking unit may be measured, and measurement information including the measured voltage value and the current value may be generated. The voltage value and the current value measured here may have the form of a continuous waveform.

The measurement of the voltage value and the current value may be at least one of a stroke of the gas insulation switchgear cutoff unit, an operation coil, and an output terminal of the breaker unit. Alternatively, the measured voltage value and current value may be a three-phase voltage or a three-phase current at a specific point of the gas insulated switchgear breaker.

The measurement information generated in the measurement information generation step (S10) may further include the operation frequency, the stroke speed, the stroke stroke length gas pressure, etc., in addition to the voltage value and current value of the gas insulation switchgear breaker. have.

In the measurement information generation step S10, measurement information may be generated by combining the measured values. The measurement information may be one program file that can be transmitted. The measurement information may include all measurement values for a plurality of objects. For example, in the measurement information generation step (S10), the current value flowing through the breaker stroke, the voltage value across the breaker stroke, the current value flowing through the operation coil, and the voltage value across the operation coil in the form of a continuous waveform. The information shown can be created in one program file.

In the information transmission step (S20), the measurement information generated in the measurement information generation step (S10) may be transmitted to the cutout monitoring unit 30 using a communication network. In the information transmission step (S20), the measurement information may be transmitted using a protocol based on UDP communication. In the information transmission step (S20), the measurement information may be transmitted using an Ethernet port of the HNIC communication card. Since a lot of noise may occur in an ultrahigh pressure device environment, the measurement information may be transmitted by using an optical port in order to reduce noise in the information transmitting step.

In the driving state analysis step (S30), it is possible to analyze the driving state of the gas insulated switchgear blocking unit using the measurement information.

Specifically, the driving state analysis step (S30) may generate a deviation value by comparing the values measured at each measurement target by using the measurement information. Alternatively, the driving state analysis step (S30) can determine whether a value out of the normal range using the measurement information.

In the driving state analysis step (S30), it is possible to generate the driving state analysis result as state information. The state information may include a current value, a voltage value, and an operation frequency of each of the measurement targets included in the measurement information. In addition, the state information may further include at least one or more of the current value and the rms converted value of the electric value, the deviation value of the measured values and the vector information for the measured values.

In the information display step S40, the state information may be displayed externally. In the information display step S40, a monitor of a PC may be used to display the status information. In addition, in the information display step S40, any known display device for external display may be used. Specifically, in the information display step (S40), all the information, such as the measurement target, current value, voltage value, deviation value and vector information included in the state information can be displayed on one screen on the monitor.

Referring to Figure 1, the gas insulation switchgear monitoring unit monitoring method according to an embodiment of the present invention may further include a warning notification step (S50).

Hereinafter, a warning notification step (S50) of the gas insulation switchgear blocking unit monitoring method according to an embodiment of the present invention with reference to FIG.

In the warning notification step (S50), it can be notified when the values included in the state information exceeds a predetermined reference value. For example, when the current value of the operating coil included in the status information exceeds a reference value (for example, the maximum allowable range of the current value flowing through the operating coil), an abnormality occurs in the cutoff portion of the gas insulated switchgear. It can be seen as. Therefore, in the warning notification step (S50), it can be notified when a current more than the allowable range flows to the operation coil. In addition, the warning notification step (S50) may inform the case that the deviation value of each target is more than the predetermined reference value using the vector information and the deviation value included in the status information. For example, the warning notification step (S50) may be notified when the magnitude difference value or the phase difference value of the current value included in the state information is greater than or equal to a preset value. Alternatively, the warning notification step (S50) may be notified when the phase difference value of the measurement target is more than a predetermined value by using the vector information.

In this case, the warning notification step (S50) may display a warning message on the screen, and output a voice message or a notification sound.

Figure 2 is a flow chart showing an embodiment of the driving state analysis step (S30) of the gas insulation switchgear blocking unit monitoring method according to an embodiment of the present invention.

2, the driving state analysis step (S30) of the gas insulation switchgear blocking unit monitoring method according to an embodiment of the present invention may include an analysis target input step (S31) and the target analysis step (S32). .

In the analysis target input step S31, a measurement target to be analyzed may be input. In the analysis target input step S31, one measurement object may be input or a plurality of measurement objects may be input. In this case, the plurality of measurement targets may be three-phase currents respectively flowing to a specific point of the gas insulated switchgear breaker, or three-phase voltages across the specific one point. Alternatively, the measurement target may be current values or voltage values measured at different points of the gas insulated switchgear blocking unit.

In the target analysis step (S32), the status information may be generated by analyzing the measurement information value of the measurement target. The state information may include at least one or more of vector information, harmonics values, and deviation values obtained by analyzing the measurement object using the measurement information.

For example, when the operation coil current value is input as a measurement target in the analysis target input step S31, the harmonic value of the operation coil current value may be generated in the target analysis step S32. The harmonics value is calculated by calculating the harmonic components of the operation coil current value, and the order of the generated harmonics value can be arbitrarily set. The harmonics value may be generated in the form of a graph representing the magnitude of each order. In addition, the harmonic value may be a table of the numerical values and RMS values for each order in addition to the graph.

In addition, when two or more different measurement targets are input in the analysis target input step (S31), the state information includes a deviation value comparing the measurement information values of the different measurement targets and vector information of the plurality of measurement targets. It may include. The vector information may be a graph appearing on a vector plane, and the user may know a difference in magnitude and phase of a current value or a voltage value of each measurement target from the vector information. In this case, in the object analyzing step S32, the vector information may be generated based on one measurement object (for example, setting a phase of any one measurement object to 0 degrees). The vector information may be a table of the magnitude and phase of the measurement targets in addition to the graph. When the three-phase currents or the three-phase voltages of a specific point are input in the analysis target input step S31, the vector analysis of the three-phase current or the three-phase voltage may be generated in the target analysis step S32. In this case, the user can grasp that the abnormality has occurred in the output of the three-phase current or the three-phase voltage of the specific point from the vector information.

The deviation value may include a difference value of a current or voltage value of the measurement targets, a difference value of an RMS value, a phase difference value, and a difference value of harmonic values for each order.

For example, when the operating coil current value and the stroke current value are input to the analysis object, the deviation value is the difference between the operating coil current value and the stroke current value, the RMS difference value of each current value, and the harmonic size of each order. The deviation value including the difference value may be generated.

In the target analyzing step S32, state information including all of the vector information, the harmonics value, and the deviation value may be generated. The status information may be one file that can be read or modified through a computer or a separate device. Therefore, the user can comprehensively grasp the driving state of each element of the gas insulated switchgear breaker using the state information.

Figure 3 shows an example of displaying the vector information of the state information in the information display step (S40) of the gas insulation switchgear blocking unit monitoring method according to an embodiment of the present invention.

Referring to FIG. 3, the vector information may represent current values or voltage values of a plurality of objects on a vector plane with one object as a reference value. In detail, in the information display step S40, as shown in FIG. 3, vector information of Ia, Ib and Ic values generated when Ia, Ib and Ic are input as a measurement object may be displayed as a graph. In addition, in the information display step (S40), the magnitude values, RMS values, and phase angles of Ia, Ib, and Ic together with the graph may be displayed in a table.

Figure 4 shows an example of displaying the harmonics value of the status information in the information display step (S40) of the gas insulation switchgear blocking unit monitoring method according to an embodiment of the present invention.

Referring to FIG. 4, the harmonics value may be generated by calculating a harmonics value with respect to a waveform of a current value or a voltage value for an input measurement target. The order of harmonics values generated here can be selected arbitrarily. For example, in the information display step S40, the harmonics value for the current value of Ic may be displayed in the form of a bar graph as shown in FIG. 4. In addition, in the information display step (S40), the magnitude value, RMS value, and DC value of Ic may be displayed in a table together with the bar graph. In this case, in the information display step S40, the harmonics value for each order may be displayed on the table.

5 is a block diagram showing the configuration of a gas insulated switchgear cutout monitoring device according to an embodiment of the present invention.

Referring to FIG. 5, the gas insulated switchgear blocking unit monitoring device according to an embodiment of the present invention may include a measuring unit 10, an input unit 20, and a blocking unit monitoring unit 30.

Hereinafter, a gas insulated switchgear blocking unit monitoring device according to an embodiment of the present invention will be described with reference to FIG. 5.

The measurement unit 10 may generate the measurement information by measuring the voltage value and the current value of the gas insulated switchgear breaker. The measurement unit 10 may generate measurement information by measuring voltage and current values of various components of one gas insulated switchgear. Alternatively, the measurement unit 10 may generate the measurement information by measuring the three-phase current value and the three-phase voltage value measured in one configuration of the gas insulated switchgear.

The measurement unit 10 may transmit the measurement information to the blocking unit monitoring unit 30. The measurement unit 10 may transmit the measurement information to the blocking unit monitoring unit 30 using a UDP communication protocol and an Ethernet network.

The input unit 20 may receive a measurement object to be analyzed from the user. In this case, the input unit 20 may receive a plurality of measurement targets. The input unit 20 may be a keyboard and a mouse of a PC. In addition, the input unit 20 may be any known input device.

The blocking unit monitoring unit 30 may generate state information including the vector information, the harmonics value, and the deviation value of the analysis target at the measurement point using the measurement information.

Specifically, the blocking unit monitoring unit 30 may generate vector information using the measurement information of the plurality of measurement targets. For example, when the input unit 20 receives three three-phase current flowing through the operation coil as a measurement target, the cut-off monitor 30 may generate vector information comparing the magnitude and phase of the three-phase currents. Can be. The vector information may be a graph in which the magnitude and phase of each of the three phase currents are displayed on a vector plane. In this case, the blocking unit monitoring unit 30 may generate the vector information by setting the phase of one current value as the reference phase 0.

The blocking unit monitoring unit 30 may generate a harmonic value using a current value or a voltage value waveform included in the input measurement information of the measurement target. The harmonics value may be a graph showing the size of the harmonics for each order. Alternatively, the harmonics value may be a table of sizes of orders. In this case, the order of the generated harmonics can be arbitrarily set.

When receiving a plurality of measurement targets from the input unit 20, the cut-off monitoring unit 30 may generate a deviation value by calculating a difference value between voltages and currents between the input targets. The deviation value may include an RMS difference value, a phase difference value, and a harmonic difference value of each order of the plurality of measurement objects.

The present invention is not limited by the above-described embodiment and the accompanying drawings. It will be apparent to those skilled in the art that the present invention may be substituted, modified, and changed in accordance with the present invention without departing from the spirit of the present invention.

10: measuring unit 20: input unit
30: blocking unit monitoring unit
S10: step of generating measurement information
S20: information transmission step
S30: driving state analysis step
S31: Input step of analysis target
S32: target analysis step
S40: Information display step
S50: Warning notification step

Claims (6)

In the method for analyzing the driving state of the gas insulated switchgear breaker,
A measurement information generation step of measuring a voltage value and a current value of the gas insulated switchgear breaker and generating measurement information;
An information transmission step of transmitting the measurement information to a cutoff monitoring unit using a communication network;
A driving state analysis step of generating state information by analyzing the driving state of the gas insulation switching device blocking unit using the transmitted measurement information; And
An information display step of displaying the status information to the outside,
The driving state analysis step
An analysis object input step of receiving three-phase currents or three-phase voltages of a measurement object to be analyzed; And
A target analysis step of generating status information by analyzing the measurement information value of the measurement target;
The state information is
Vector information on the three-phase current or three-phase voltage, the harmonic value of the operating coil current value flowing through the operation coil of the gas insulated switchgear breaker using the measurement information, the operation coil current value and the gas A gas including a deviation value including a difference value of a stroke current flowing through a stroke of the insulation switch disconnecting unit, an RMS difference value of the operating coil current value and the stroke current value, and a difference value of harmonic magnitudes for each order of the harmonics value. How to monitor insulated switchgear breakers.
delete delete The method of claim 1,
And a warning notification step of notifying when the values included in the state information exceed a preset reference value.
The method of claim 1, wherein the information transmitting step
Monitoring method of gas insulated switchgear blocking unit for transmitting the measurement information using the UDP communication protocol and the Ethernet port of the HNIC communication card.
A measuring unit which measures the voltage value and the current value of the gas insulated switchgear breaker to generate measurement information and transmits the measured information to the breaker monitor;
An input unit configured to receive three-phase currents or three-phase voltages of a measurement target to be analyzed; And
Vector information on the three-phase current or three-phase voltage, the harmonic value of the operating coil current value flowing through the operation coil of the gas insulated switchgear breaker using the measurement information, the operation coil current value and the gas A state including a deviation value including a difference value of a stroke current flowing through the stroke of the insulation switch disconnecting unit, an RMS difference value of the operating coil current value and the stroke current value, and a difference value of harmonic magnitude for each order of the harmonics value. Gas insulated switchgear breaker monitoring device including a breaker monitoring unit for generating information.

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