JPH0614478A - Remote diagnosis equipment for transformer station equipment - Google Patents

Abstract

PURPOSE:To provide a remote diagnostic system at a central controlling station to constantly monitoring switchgears and distribution panels in the plurality of remote transformer stations without an interruption. CONSTITUTION:A measurement unit 13 is installed for each of the plurality of distribution panels 12 which control a switchgear 11 in a transformer station 15. A reaction of each measurement unit to a command signal is measured at all time. All these measurement units are connected and the measurement data is aggregated at each transformer station and then the aggregated data of each transformer station is transmitted to a central controlling station 16. The operation of each switchgear and of each distribution panel is intensively monitored by a diagnosis processing section 42 in the controlling station and a failure occurance alarm or a failure prediction alarm is sent out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention relates to diagnosis of substation equipment,
In particular, it relates to diagnosis of switchgear and switchboards that perform opening and closing operations.

[0002]

2. Description of the Related Art For diagnosis of switchgear and switchboard,
A method has been performed in which the mobile diagnostic apparatus 10 is occasionally "transported" to the site to cyclically make a round of diagnosis.

FIG. 2 shows a conceptual diagram of a conventional mobile diagnostic apparatus. The substation 15 is usually provided with a switchboard in units of power system divisions, but in this figure, only one switchboard is represented as the switchboard 12 as a representative. Further, the switchboard 12 is shown in association with one switchgear 11 and one protective relay 26, but for the sake of conceptual explanation,
Only the number is shown, and usually a plurality of switchgear and a plurality of protective relays are combined.

For the following description, the contacts and signals associated with the switchgear 11, the protective relay 26, and their behavior will be briefly described.

1 closing start contact 2 opening start contact 3 protective relay contact 4 opening signal 5 closing command signal 6 opening command signal 7 opening / closing status signal 8 equipment status contact 1'diagnosis starting start signal 2'diagnostic opening start signal 4 ' Diagnostic failure start signal 1 ″ close start signal 2 ″ open start signal 4 ″ protection relay operation signal

When the closing start contact 1 in the switchboard 12 is closed, the relay CX operates and the closing coil C of the switchgear 11 is closed.
When the device is turned on and the opening start contact 2 is closed, the relay OX operates, and the opening coil O of the switching device is energized to open the device.

When the protective relay 26 detects an abnormality, the contact 3 in the protective relay is closed to energize the auxiliary relay AX and energize the open coil O of the switchgear to open the switchgear. The contact 8 in the switchgear is closed by the energization of the closing coil C and opened by the energization of the open coil O to energize / de-energize the relay MX in the switchboard 12. The relay MX is used for interlocking in the switchboard.

Mobile diagnostic device 10 is typically connected to switchboard 12 by a multi-core cable 18. The multi-core cable is connected by the multi-core connector 19 so as to be easily attached and detached.

Then, according to the diagnostic program input corresponding to the switchboard to be diagnosed, the diagnostic closing activation signal 1 ', the diagnostic opening activation signal 2', and the diagnostic failure activation signal 4'are output to output the equipment. Turn on, open, or give a fault input on behalf of the protective relay.

For monitoring the response of these diagnostic actions, for example, the open / closed state 7 of the equipment, the closed command signal generation state 5, the open command signal generation state 6, the closing activation signal 1 ", the opening activation signal 2", etc. Is monitored, a diagnosis is made by the diagnosis unit based on a previously determined rule, and a good / bad warning is output.

To summarize the above, in the past, a mobile diagnostic device was brought to each switchboard every time a diagnosis was made, a cable was connected, and a control command signal was given to the device and switchboard for individual diagnosis. The diagnosis was made by looking at the reaction situation.

[0012]

The conventional diagnosis methods have the following problems. 1. The device to be diagnosed was moved for diagnosis, and the degree of movement was diagnosed based on the related signals 5, 6 and 7.

For example, when the closing signal 1'is given, whether the signal 5 and the signal 7 stand within the reference time, and when the opening signal 2'is given, the signal 6 stands and the signal 7 stands within the reference time. It is diagnosed as to whether or not there is no signal, and when the signal 4'is given while the device is turned on by giving the closing signal 1 ', whether there is no signal 7 within the reference time.
The diagnosis will be performed after the operation of the diagnosis target is stopped, and the diagnosis work time zone is limited.For example, in the case of an electric railway, normally, the so-called “after the last train operation is started before the first train operation is started in the next morning”. "Nighttime zone" was used for diagnosis, working conditions deteriorated, and it was difficult to secure human resources.

2. Since it is a mobile patrol diagnosis, the diagnosis is made periodically, but it is usually about once a year. Because the conventional diagnostic device 10 is mobile, it is more like “carrying” by car than “carrying” by hand, and it takes time to carry and set. So, I couldn't go to the point of frequent diagnosis patrol. For this reason, when a failure occurs between the regular diagnosis and the regular diagnosis, for example, when a failure that the device cannot be inserted occurs, there is no means for identifying whether the device is defective or the switchboard is defective, and the defect is recovered. It took some time to respond.

3. The periodic diagnosis enables the equipment diagnosis at the time section, but it is difficult to predict the failure. Therefore, although the defects that were apparent at that time can be found, the latent items that are likely to become defective in the future cannot be recognized.

[0016]

[Means for Solving the Problems] In order to solve these problems, means for enabling equipment diagnosis without suspending operation of equipment for the purpose of diagnosis, and equipment failure prediction are possible. And the means to do it.

Therefore, the present invention is to change to a mode in which measurement data is continuously measured and continuously obtained during daily facility operation, and the data is aggregated and collected in a central management office, where standard time, past The problem is to be solved by constructing a system for making a comprehensive judgment by collating it with the measurement history value and the like.

[0018]

EXAMPLE A conceptual diagram of an example is shown in FIG. Switchboard 12,
The switchgear 11 and the protective relay 26 are shown in the same manner as in the conventional example of FIG.

In the substation, the remote diagnosis apparatus of the embodiment is provided with one measuring unit 13 for each switchboard,
One aggregation unit 14 is provided in the substation, and the aggregation unit collects measurement data from the plurality of measurement units 13a to 13c corresponding to the plurality of switchboards 12a to 12c via the in-house transmission line 17.

The data of the aggregation unit of the substation is sent to the management office 16 (the department managing the electric equipment) via the telephone line 20.
Of the central diagnostic device 43. The central diagnostic device collects data of a plurality of substations 15a to 15d in the pipe, makes an appropriate diagnostic judgment, and outputs the data.

In the embodiment, one switchboard 12 has one
One measuring unit 13 is provided. Since the measurement unit is fixedly installed, the connection with the switchboard is not fixed by the multicore connector, but fixed wiring. As indicated by the dotted line in FIG. 1, they are connected (generally with exceptions) at the input / output terminals of the switchboard.

Since an ordinary switchboard uses a DC 100V control power supply (bus 100P, 100N), in the measurement unit, the input converter converts the voltage into a voltage suitable for internal processing. A specific example of the conversion method is shown in FIG. 3 illustrates the signals 1 ″, 2 ″, and 4 ″, but the same applies to the signals 5, 6, and 7 in FIG. 1. The 100V signal on the switchboard is the resistances R ₁ and R _{2 of the} input conversion unit. , R ₃ and the voltage is applied to the photocoupler 32, where it is converted into a 24V signal.

In the input converter, various noises superimposed on the control power supply circuit are blocked by the surge absorber 31 and the photocoupler 32 to stabilize the internal processing of the measuring unit. The measuring unit has a timer with a required accuracy, and counts and stores the operation time of the device to be diagnosed.

The data acquired by the measuring unit is stored in one substation.
They are collected in the individually provided collecting unit 14. The aggregation unit has an internal clock and adds time data to the arrival data from the measurement unit 13. The time data is periodically calibrated by the central diagnostic device 43.

In the aggregation unit 14 of the substation, the operation time, operation time or presence / absence of operation of the diagnosis target device in the substation, the context of the operation devices, and the like are stored.

The data collected in the aggregation unit 14 of the substation is transmitted to the central diagnostic device 43 of the management station 16 via the telephone line. The central diagnostic device can sequentially call the substation aggregation units to collect data, or the substation aggregation unit can transmit data to the central diagnostic device each time data is generated.

In the diagnostic processing section 42 of the central diagnostic device 43,
The operation time, operation time or presence / absence of operation of each operation of the device to be diagnosed, the context of the operation of the related device are grasped, and the following items are performed.

If the operation time exceeds the limit standard, a defect occurrence warning is immediately printed out. At this time, the determination result of whether the device is defective is also printed out. For example, when the closing command signal 5 is raised in FIG. 1 but the open / closed state signal 7 is raised for a time exceeding the limit time (including the case where the signal is not raised forever), it is determined that the device is defective. . Further, when the signal 5 is not raised although the signal 1 ″ is raised, it is determined that the switchboard is defective.

With respect to one device, the change in operating time with time is arranged and printed out in a predetermined format. Further, for example, when the reaction to the command becomes sluggish, it is possible to predict the deterioration of performance or the progress of deterioration of parts, so that a failure prediction warning is automatically printed out by comparison with a predetermined criterion. .

With the above-mentioned configuration, in contrast to the conventional method of diagnosing a device to be diagnosed for diagnosis and diagnosing according to the response status thereof, by measuring the normal power system operation status as it is, a special diagnosis can be performed. The device diagnosis can be performed without accompanying the device operation.

[0031]

Effect of the Invention Since the equipment control for diagnosis is unnecessary, the diagnosis work under bad working conditions, for example, night work can be abolished, and the problem of shortage of diagnosis workers can be solved. 2. When a device operation failure occurs, it can be immediately detected, and it is possible to determine whether the switchboard is broken or the device is defective, so that the recovery action can be appropriately performed. 3. Since the diagnosis is performed based on the change over time of the device operation time, predictive maintenance is possible. The conventional method is improved in that the diagnostic judgment can be made only after a defect has occurred. 4. Since the diagnostic judgment is centrally carried out at the central control station with reference to various data, the judgment does not vary depending on the site environment or the personality of the worker.

[Brief description of drawings]

FIG. 1 shows an embodiment of a remote diagnosis device of the present invention.

FIG. 2 is a diagram showing a conventional diagnostic device.

FIG. 3 is a detailed view showing the connection relationship between the input conversion unit and the switchboard according to the embodiment of the present invention.

[Explanation of symbols]

 1 Closed start contact 2 Opened start contact 3 Protective relay contact 11 Switching device 12 Switchboard 13 Measurement unit 14 Aggregation unit 15 Substation 16 Management office 25 Input / output conversion unit 27 Measurement unit 28 Transmission unit 41 Central transmission unit 42 Diagnostic processing unit 43 Central Diagnostic device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kouwa Hiraide 2-chome, Nishi 2-chome 27, Kunitachi-shi, Tokyo 27 2-102, JR Tohnichi Kunitachi Nishisha (72) Inventor Shinkichi Hamanaka 3-chome Tennodai, Abiko-shi, Chiba No. 19-10 (72) Inventor Takeshi Hayashi 1-10-304 Nakarokugo, Ota-ku, Tokyo (72) Masao Hayashi 1-25-2 Komai-cho, Komae-shi, Tokyo

Claims (5)

[Claims] 1. A dedicated measuring unit is provided for each of a plurality of switchboards for controlling switchgear in a substation to constantly measure a response to a command signal, and the switchboards are provided for each of the switchboards. Each substation is equipped with an aggregation unit for connecting and transmitting the measured data of each substation by connecting multiple measured units to each other. A remote diagnosis device for substation equipment, which can be collected at a management office. 2. The input conversion unit, wherein the measurement unit takes in a close command signal line, an open command signal line, an open / close state signal line, a release signal line of a protective relay for releasing a switchgear, and the like from a switchboard, and the input signal. A measurement unit that measures, recognizes, and stores the presence or absence of a specific signal in the switchboard, the presence or absence of protection relay operation, and the operating time of switchgear based on changes in
2. The remote diagnosis device for substation equipment according to claim 1, further comprising a transmission unit for transmitting measurement results each time. 3. The aggregation unit includes an internal transmission unit that sequentially and rapidly collects measurement data from one or a plurality of measurement units, and an aggregation processing unit that adds time data to the measurement data to organize and store the data. 3. The remote diagnosis device for substation equipment according to claim 1, further comprising a higher-order transmission unit for transmitting data. 4. A central transmission unit for remotely collecting aggregated data from one or a plurality of aggregation units by the management office, and storing the collected data, and the operating time state and secular change of the switchgear at the substation. 4. The remote diagnosis apparatus for substation equipment according to claim 1, 2 or 3, further comprising a central diagnosis apparatus including a diagnosis processing unit for statistically organizing the above. 5. The central diagnostic device measures and collects the presence / absence of a specific signal in the switchboard and the opening / closing operation time of the switchgear in the normal control of the switchgear in the substation, and protects it in the event of a power system accident. Measures and collects the operation of relays and the presence / absence of switching operations of switchgear, and the operation time, and judges whether the operation sequence of switchboards and switchgear is good or bad and the time of operation is good based on comparison with a predetermined reference value. 2. The remote diagnosis apparatus for substation equipment according to claim 1, wherein the generation warning is output and the failure prediction warning is output by history-determining the secular change of the operating time of each equipment.