JP2010276551A - Partial discharge monitoring device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To use without restricting only to a specific GIS (gas insulated switchgear), and to confirm quickly minimum information required by a monitoring person. <P>SOLUTION: A simplified PDM (partial discharge monitoring) device 1 for monitoring partial discharge in a GIS 4 includes a reception part 130 for receiving from a detector box 2, primary data which are the results of primary determination, performed in the detector box 2; a secondary determination processing part 112 for performing secondary determination for determining whether the primary data are information pertinent to partial discharge; and a data accumulation processing part 114 for storing the result of the secondary determination into a storage part 120 as accumulation data 121. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a technique of a partial discharge monitoring device.

It is very important to capture partial discharge, which is a sign of insulation failure, which is said to account for 60% of the main accident causes of GIS (Gas Insulated Switchgear), and PDM (Partial Discharge Monitoring) equipment is used for monitoring It has been.
FIG. 6 is a diagram showing an example of a conventional partial discharge monitoring system including such a PDM device.
In the partial discharge monitoring system B of each substation 7a, the GIS 4 has an A phase, a B phase, and a C phase corresponding to three-phase alternating current. Each of the A phase, the B phase, and the C phase includes a sensor 3 that measures a signal value in the GIS 4, and the signal data acquired by the sensor 3 is transmitted to the detector box 2 via the cable 8. . It should be noted that this signal value includes a partial discharge that does not affect the GIS and noise that cannot be removed in advance, and is this a PD that affects the GIS by primary determination and secondary determination described later. It is determined whether or not it is really PD, not noise. The detector box 2 performs primary determination described later with reference to FIG. 4 on the signal data transmitted from the sensor 3, and determines whether or not the acquired signal data is data corresponding to partial discharge.

If it is determined that the acquired signal data corresponds to partial discharge as a result of the primary determination, the detector box 2 is the result of the primary determination to the PDM apparatus 1a via the communication network 9 such as an optical cable and the hub 10. Send primary data.
Similarly, primary data in the other GIS 4 is also collected in the PDM apparatus 1 a via the sensor 3 → the detector box 2 → the hub 10.

  The primary data sent to the PDM apparatus 1a includes information such as a signal value, a signal frequency, a phase, and time. In the PDM device 1a, the secondary determination for determining in detail whether the sent information is a partial discharge that affects the GIS 4 or whether it is really a partial discharge, and where in the GIS 4 the partial discharge occurs. A position evaluation process for analyzing whether it has occurred or a signal exceeding a preset threshold value is recorded in time series to determine the cause of partial discharge and its risk. Here, although the threshold value is exceeded, the primary data that is determined not to be partial discharge or determined not to affect the GIS 4 by the secondary determination is recorded as a phenomenon called “event”.

  The PDM device 1a is provided with a display device 12. The display device 12 displays primary data sent from the detector box 2, secondary determination, and analysis results. The displayed analysis results are displayed in two dimensions, such as PD (Partial Discharge) value-frequency, PD value-phase data, PD value-frequency-time, PD value-phase-time, etc. PD real-time data for displaying data in three dimensions and its trend data, information on where in GIS4 partial discharge has occurred, PD generation record list, single line displaying signal value and frequency at each sensor 3 It is a connection diagram. As a result of the analysis, information on the status of the simplified PDM device 1 and the partial discharge monitoring system A, information on manual operation related to a change in the setting value of the simplified PDM device 1 input via the terminal 6, etc. May be included.

  An alarm device (not shown) is connected to the PDM device 1a. The PDM device 1a receives primary data from the detector box 2 and causes the alarm device to output an alarm. When the monitor confirms the alarm, the monitor moves to the room where the PDM device 1a is installed, and checks each information displayed on the display device 12 provided in the PDM device 1a.

  Further, outside the substation 7a, a remote monitoring device 11 that monitors the PDM devices 1a in the plurality of substations 7a is connected to each substation 7a via a wide area network 13 such as a WAN (Wide Area Network). Connected to the PDM apparatus 1a.

Here, in the analysis of the PDM apparatus 1a as shown in FIG. 6, information such as the position evaluation process and the single-line connection diagram is analyzed if the configuration of the GIS 4 or the sensor 3 installed in the GIS 4 is not known. I can't. Therefore, the PDM apparatus 1a as shown in FIG. 6 can be used only for a specific GIS 4 set in advance. Moreover, since such a PDM apparatus 1a is expensive, it is often used in a substation 7a that handles a voltage of 200 kV or more, which is an important substation.
However, in reality, there is a demand for use in a substation 7a of 156 kV or less.

  Non-Patent Document 1 proposes a smart coupler as one method for meeting such a demand. The smart coupler is a combination of the sensor 3 and the detector box 2 in FIG. The primary data measured and determined by the smart coupler is transmitted to the base unit. The base unit stores the transmitted primary data and sends it to a PC (Personal Computer) via a LAN (Local Area Network), Bluetooth (registered trademark), or the like. The PC to which the primary data is sent performs a position evaluation process and an analysis process such as PD determination.

“SmartCoupler G”, [online], January 2005, Diagnostic Monitoring Systems Ltd, [Search May 21, 2009, Internet <URL: http://www.dmsystems.co.uk/brochures/SmartCoupler_G.pdf >

  However, the technique described in Non-Patent Document 1 has only a function of storing primary data. Therefore, even if the base unit receives primary data from the smart coupler (detector box) and an alarm is output, the PC is connected to the base unit and the primary data is downloaded. It takes time to check the result of whether or not the monitor is a partial discharge.

  The present invention has been made in view of such a background, and it is an object of the present invention to be able to quickly confirm the minimum information that can be used without being limited to a specific GIS and that is required by a supervisor.

In order to solve the above problem, the partial discharge device of the present invention is characterized in that secondary determination is performed on primary data transmitted from a detector box, and the result of the secondary determination is stored in a storage unit.
Other solutions will be described as appropriate in the embodiments.

  According to the present invention, not only a specific GIS but also a minimum information required by a supervisor can be quickly confirmed.

It is a figure which shows the structural example of the partial discharge monitoring system which concerns on this embodiment. It is a figure which shows the structural example of the simple PDM apparatus which concerns on this embodiment. It is a flowchart which shows the outline | summary procedure of the whole process which concerns on this embodiment. It is a flowchart which shows the procedure of the process in a detector box. It is a flowchart which shows the procedure of the process in the simple PDM apparatus which concerns on this embodiment. It is a figure which shows the example of the conventional partial discharge monitoring system.

  Next, modes for carrying out the present invention (referred to as “embodiments”) will be described in detail with reference to the drawings as appropriate.

(System configuration)
FIG. 1 is a diagram illustrating a configuration example of a partial discharge monitoring system according to the present embodiment. In FIG. 1, elements similar to those in FIG. 6 described above are denoted by the same reference numerals and description thereof is omitted.
In the partial discharge monitoring system A installed in the substation 7, the GIS 4 has an A phase, a B phase, and a C phase corresponding to three-phase alternating current. Each of the A phase, the B phase, and the C phase is provided with a sensor 3 that constantly measures the signal value in the GIS 4, and the signal data acquired by the sensor 3 is sequentially transmitted to the detector box 2 via the cable 8. Is done. It should be noted that this signal value includes a partial discharge that does not affect the GIS and noise that cannot be removed in advance, and is this a PD that affects the GIS by primary determination and secondary determination described later. It is determined whether or not it is really PD, not noise. The detector box 2 performs primary determination described later with reference to FIG. 4 on the signal data transmitted from the sensor 3, and determines whether or not the acquired signal data is data corresponding to partial discharge. The detector box 2 may be a fixed type or a non-fixed type.
Note that the simple PDM device 1 may be connected (mounted) to a specific detector box 2 as a master.

If it is determined as a result of the primary determination that the acquired signal data corresponds to partial discharge, the detector box 2 has a box shape as shown in FIG. 1 via a communication network 9 such as an optical cable. Signal data (primary data) for a period determined to correspond to partial discharge is transmitted to the simplified PDM device 1 (partial discharge monitoring device).
Similarly, primary data in the other GIS 4 is also collected in the simplified PDM apparatus 1 via the sensor 3 → detector box 2.

When the simplified PDM device 1 receives primary data from the detector box 2, it outputs alarm information from the alarm device 5 and determines whether or not the received primary data is actually data corresponding to partial discharge. Secondary determination such as determination and other analysis processing described later are performed, and the received primary data and the result of the secondary determination are stored in the storage unit 120 (FIG. 2).
Then, after the monitor confirms the alarm output, when the terminal 6 (external device) such as a notebook PC is connected to the simplified PDM apparatus 1, the primary data and the result of the secondary determination are transferred from the simplified PDM apparatus 1 to the terminal 6. And information on the results of analysis processing are sent.
In addition, when there are many detector boxes 2 or when the distance between the detector box 2 and the simplified PDM device 1 becomes long, a hub is installed between the simplified PDM device 1 and the detector box 2. Also good.

(Simple PDM device configuration)
FIG. 2 is a diagram illustrating a configuration example of the simplified PDM apparatus according to the present embodiment.
The simplified PDM apparatus 1 includes a reception unit 130, a transmission unit 140, a terminal connection unit 150, a processing unit 110, and a storage unit 120. The receiving unit 130 performs processing such as receiving primary data from the detector box 2. The transmission unit 140 performs a process of transmitting information to the alarm device 5 (FIG. 1). The terminal connection unit 150 is a connection terminal that connects the terminal 6 such as a USB (Universal Serial Bus) port and the simplified PDM apparatus 1 and communicates with the connected terminal 6. The storage unit 120 stores accumulated data 121 that is information on primary data, results of secondary determination, and results of analysis processing described later. The simplified PDM device 1 according to the present embodiment does not include the display device 12 like the PDM device 1a shown in FIG. By not including the display device 12, the simplified PDM device 1 according to the present embodiment can improve portability.

The processing unit 110 includes an alarm processing unit 111, a secondary determination processing unit 112, an analysis processing unit 113, a data storage processing unit 114, and a terminal processing unit 115 as an external device processing unit. When the alarm processing unit 111 detects the reception of primary data, the alarm processing unit 111 performs a process of causing the alarm device 5 to output alarm information. The secondary determination processing unit 112 has a function of performing secondary determination such as PD determination. The analysis processing unit 113 has a function of creating data that is the result of analysis processing such as PD real-time trend data and PD list using the result of secondary determination and partial discharge data. The data accumulation processing unit 114 performs processing for storing the received primary data and information on the result of the secondary determination in the storage unit 120 as accumulated data 121. The terminal processing unit 115 detects the connection of the terminal 6 in the terminal connection unit 150, and when the terminal 6 downloads the stored data 121, the terminal processing unit 115 transmits the stored data 121 in the storage unit 120 to the terminal 6.
The analysis processing unit 113 can be omitted.

  In addition, each unit 111 to 115 of the processing unit 110 has a program stored in a ROM (Read Only Memory) (not shown) or a HD (Hard Disk) (not shown) developed in a RAM (Random Access Memory) (not shown), not shown. It is embodied by being executed by a CPU (Central Processing Unit).

(Overall processing)
FIG. 3 is a flowchart showing an outline procedure of the overall processing according to the present embodiment. Detailed processing procedures of the detector box 2 and the simplified PDM device 1 will be described later with reference to FIGS.
First, the sensor 3 transmits data relating to the detected signal value in the GIS 4 to the detector box 2 (S101).
The detector box 2 that has received data from the sensor 3 (S102) performs a primary determination process (S103), and determines whether the data received from the sensor 3 corresponds to partial discharge. Details of the primary determination process will be described later with reference to FIG.
As a result of the primary determination process, data determined to correspond to partial discharge is transmitted as primary data to the simplified PDM apparatus 1 (S104).

Receiving the primary data (S105), the simplified PDM device 1 issues an alarm instruction to output alarm information to the alarm device 5 (S106). The alarm device 5 instructed to output an alarm outputs an alarm (S107).
Further, the simplified PDM device 1 performs a secondary determination process for determining in detail whether or not the received primary data really corresponds to partial discharge (S108), and further performs an analysis process (S109). Data storage processing for storing the received primary data, secondary determination processing result, and analysis processing result information in the storage unit 120 is performed (S110). Details of the secondary determination process will be described later with reference to FIG.
Note that the processing of step S106 may be performed after the processing of steps S108 and S109, or the processing of step S106 may be performed between the processing of steps S108 and S109.

(Detector box processing)
Next, the processing in the detector box 2 will be described along FIG. 4 with reference to FIG.
FIG. 4 is a flowchart showing a processing procedure in the detector box.
First, the detector box 2 receives data such as signal values in the GIS 4 from the sensor 3 (S201).
Next, the detector box 2 determines whether the data received from the sensor 3 meets all of the primary determination conditions, or at least satisfies the condition (1) described later (S202). It is determined whether or not the discharge is applicable. In the process of step S202, it is determined whether or not the data received from the sensor 3 satisfies the primary determination condition and whether or not the condition (1) described later is satisfied.
There are the following three primary determination conditions.
(1) The value is greater than or equal to a predetermined value set in advance.
(2) The time that is not less than the predetermined voltage value is not less than a preset time.
(3) The same change does not occur in other phases.
Among these primary determination conditions, (3) is, for example, when a change in the signal value is detected in the A phase (FIG. 1), if the same change occurs in the B phase and the C phase, the disturbance noise This is because of the effects of this.

In step S202, when the received data satisfies all three of the primary determination power conditions, or at least satisfies the condition (1) (S202 → Yes), the detector box 2 simplifies the received data as primary data. Is transmitted to the type PDM apparatus 1 (S203), and the process returns to step S201.
In step S202, when the received data does not satisfy even one of the primary determination conditions or at least does not satisfy the condition (1) (S202 → No), the detector box 2 receives the data received from the sensor 3. Discard (S204) and return to step S201.

  If the detector box 2 satisfies at least the condition (1) among the three primary determination conditions described above, the detector box 2 transmits the primary data to the simplified PDM apparatus 1 to perform secondary determination of the simplified PDM apparatus 1. If it is determined that the discharge is not partial discharge, it may be stored in the storage unit 120 of the simplified PDM device 1 as “event data” for reference.

(Simple PDM device processing)
Next, processing in the simplified PDM apparatus 1 according to the present embodiment will be described along FIG. 5 with reference to FIGS. 1 and 2.
FIG. 5 is a flowchart showing a processing procedure in the simplified PDM apparatus according to the present embodiment.
First, the processing unit 110 determines whether primary data has been received from the detector box 2 (S301).
If the primary data is not received in step S301 (S301 → No), the processing unit 110 advances the processing to step S306.
In step S301, when the primary data is received (S301 → Yes), the alarm processing unit 111 instructs the alarm device 5 to output alarm information via the transmission unit 140 (S302).

Next, the secondary determination processing unit 112 performs a secondary determination process using the received primary data (S303).
Secondary determination processing includes PD determination processing and the like. PD determination processing is based on detailed analysis based on phase information, etc., to determine whether the received primary data really corresponds to partial discharge or whether it is partial discharge that affects GIS4. It is processing to do. That is, it can be said that the primary determination process (S202) in the detector box 2 is a simple determination process, and the secondary determination process (S303) in the simplified PDM apparatus 1 is a detailed determination process.
As a result of the secondary determination process, primary data that is determined not to correspond to partial discharge or determined to be partial discharge that does not affect GIS 4 is included in the accumulated data 121 as event data.

Next, the analysis processing unit 113 performs analysis processing using the result of the secondary determination processing and the primary data (S304), and generates analysis data. Analysis data is a PD that displays data such as PD value-frequency and PD value-phase in two dimensions, or displays data such as PD value-frequency-time, PD value-phase-time, etc. in three dimensions. This is data related to real-time data and trend data, partial discharge list, event list, history of primary data, and the like.
In step S304, analysis that requires information on the structure of the GIS 4 and the structure of the sensor 3, such as a position rating that is information on where the partial discharge occurred in the GIS 4, is not performed. Unlike the PDM apparatus shown in FIG. 6, the simplified PDM apparatus 1 according to the present embodiment is not limited to a specific GIS 4 by not performing analysis that requires information on the structure of the GIS 4 or the structure of the sensor 3. Can be used.
Further, the process of step S304 may be omitted.
Furthermore, the process of step S302 may be performed anywhere between the processes of steps S301 to S305.

  After step S304, the data accumulation processing unit 114 performs data accumulation processing for storing the secondary determination result in step S303 and the analysis result in step S304 as accumulated data 121 in the storage unit 120 (S305). The accumulated data 121 may include primary data received from the detector box 2.

Next, the terminal processing unit 115 determines whether or not the terminal 6 is connected to the terminal connection unit 150 (S306).
As a result of step S306, when the terminal 6 is not connected to the terminal connection unit 150 (S306 → No), the processing unit 110 returns the process to step S301.
As a result of step S306, when the terminal 6 is connected to the terminal connection unit 150 (S306 → Yes), the terminal processing unit 115 transmits the accumulated data 121 to the terminal 6 via the terminal connection unit 150 (S307). The processing unit 110 returns the process to step S301.

The terminal 6 is not limited to a notebook PC, and may be any device having a display function of information such as a PDA (Personal Digital Assistant) or a mobile phone.
In addition, the simplified PDM device 1 may be provided with a handle (not shown) for convenience of carrying.
Furthermore, in the present embodiment, the simple PDM device 1 has a box shape, but the shape is not limited to this and may be any shape that can be carried.
Further, the accumulated data 121 may store only the result of the secondary determination.
Further, the connection between the simplified PDM apparatus 1 and the terminal 6 may be, for example, a wired connection such as USB, or a close proximity wireless connection such as Bluetooth. Further, the terminal 6 may be connected to the simplified PDM apparatus 1 via the communication network 9 or the like.
Further, the alarm device 5 may be installed outside the substation 7.

(Summary)
According to the simplified PDM apparatus 1 according to the present embodiment, the secondary determination of partial discharge is performed in the simplified PDM apparatus 1 so that the supervisor can download necessary data just by downloading the accumulated data 121 to the terminal 6. Can be confirmed. In the technique described in Non-Patent Document 1, since primary data is stored without performing processing such as secondary determination, the supervisor needs to perform processing such as secondary determination after downloading the primary data to the terminal 6. There is a case that confirmation of necessary data is delayed.
Furthermore, according to the simplified PDM device 1 according to the present embodiment, the PD value-frequency, PD value-phase, and other data are displayed in two dimensions in the simplified PDM device 1, or the PD value-frequency-time, PD Monitors by creating PD real-time data and its trend data, partial discharge list, event list, primary data history, etc. that display value-phase-time and other data in three dimensions The person can download the data and check the necessary data immediately.

Further, according to the simplified PDM apparatus 1 according to the present embodiment, information on the structure of the GIS 4 and the structure of the sensor 3 such as the position evaluation that is information on where the partial discharge has occurred in the analysis process of step S304 is obtained. By not performing the necessary analysis, it can be used without being limited to a specific GIS4. For this reason, it is possible to perform inspections with a plurality of GIS 4 with one simple PDM device 1 by shifting the timing.
Furthermore, since the display device 12 is not provided, the simplified PDM device 1 can be provided with a compact shape and excellent portability. Further, the display device 12 is not provided, and the cost can be reduced by not performing an analysis that requires information on the structure of the GIS 4 or the structure of the sensor 3.

1 Simple PDM device (partial discharge monitoring device)
2 Detector box 3 Sensor 4 GIS
5 Alarm device 6 Terminal (external device)
7 Substation 110 Processing Unit 111 Alarm Processing Unit 112 Secondary Determination Processing Unit 113 Analysis Processing Unit 114 Data Storage Processing Unit 115 Terminal Processing Unit (External Device Processing Unit)
DESCRIPTION OF SYMBOLS 120 Memory | storage part 121 Accumulated data 130 Reception part 140 Transmission part 150 Terminal connection part A Partial discharge monitoring system

Claims (5)

A partial discharge monitoring device for monitoring partial discharge in GIS,
A receiver that receives primary data, which is a result of a primary determination performed by a detector box, for data from a sensor provided in the GIS, from the detector box;
A secondary determination processing unit for performing a secondary determination to determine whether the primary data is information corresponding to partial discharge;
A partial discharge monitoring apparatus comprising: a data accumulation processing unit that stores a result of the secondary determination as accumulated data in a storage unit. When the receiving unit receives data on the partial discharge from the detector box, an alarm processing unit that outputs alarm information to an alarm device,
The partial discharge monitoring apparatus according to claim 1, further comprising: When an external device is connected to the partial discharge monitoring device itself,
An external device processing unit for transmitting data stored in the storage unit to the external device;
The partial discharge monitoring apparatus according to claim 1, further comprising: An analysis processing unit that generates analysis data that does not depend on the structure of the GIS, using at least one of the primary data and the information on the result of the secondary determination,
In addition,
The partial discharge monitoring apparatus according to claim 1, wherein the accumulated data includes the analysis data. The analysis data includes three-dimensional data including PD real-time trend, partial discharge value-frequency-time, partial discharge value-phase-time, which displays data such as partial discharge value-frequency and partial discharge value-phase in two dimensions. A PD real-time trend, a partial discharge list, an event list that is a list of events determined as not corresponding to partial discharge as a result of the secondary determination, and data relating to the history of the primary data. Item 5. The partial discharge monitoring device according to Item 4.

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