KR20140032846A - Apparatus for providing abnormal status information of substation - Google Patents

Abstract

The present invention provides a device for providing abnormal status data of a substation capable of receiving power data of a plurality of substations located in each area overall, extensively analyzing abnormality in an integrated manner, automatically determining the type of a failure, and building a database including integrated failure data. To do so, the present invention includes: one or more power data acquisition units which collect power data of each accessory device in substations located in each area and transmit the data through remote communication; an integrated abnormality determination module which receives the power data of each substation transmitted from the power data acquisition units, classifies the power data, determine abnormality by analyzing the classified power data based on reference failure waveform data, classifies the type of the abnormality, and stores and displays failure data; and a power data storage module which provides the reference failure waveform data to the integrated abnormality determination module and updates and stores the failure data of each analysis type determined as abnormality. [Reference numerals] (110) Data receiving unit; (120) D/A conversion unit; (130) Abnormality determination unit; (140) Display and pre-trigger unit; (210) Reference failure waveform database; (220) Neuropurge unit; (230) Failure data storage database; (A1,A2,An) Power data acquisition unit

Description

Apparatus for Providing Abnormal Status Information of Substation}

The present invention relates to an apparatus for providing abnormal state information of a substation. More particularly, the present invention relates to a substation for detecting and analyzing power information of abnormal states in a plurality of substations scattered by regions. An abnormal state information providing apparatus of the present invention.

As is well known, as the industry develops and the quality of life increases, the stable supply of electric power is considered to be very important in the industrial and living aspects, and the magnitude of the damage caused by the blackout is also gradually increasing, which prevents power failure. It is important.

In addition to establishing countermeasures for preventing power outages, in order to determine damage compensation due to power outages, accurate analysis of the causes of failures (that is, causes of abnormal conditions) is necessary.

For this reason, in substations that have major power facilities, it is necessary to always store and store power information necessary for cause analysis and countermeasures in case of failure. In particular, accurate cause analysis is needed using power information in case of failure.

However, currently, a fault recorder that can be used for cause analysis in the state of holding power information at the time of failure is the only equipment provided in the substation.

As shown in FIG. 1, the fault recorder simply expresses basic voltage and current information in the form of a graph, and thus helps to recognize a simple fault condition.

Related technologies include Korean Patent Publication No. 2009-0078186 (Surveillance Information Transmission System and Method thereof) (2009.07.17).

However, although the fault recorder provided in the conventional substation is helpful in recognizing a simple fault condition, as shown in FIG. 2, there is a problem in that it is difficult to accurately estimate a complicated fault condition frequently occurring in the substation. .

Moreover, in recent years, various relays and power information acquisition devices of substations have been digitized, and substation systems have evolved into digital substations that can operate substations by controlling and controlling these digital devices. In this situation, it is urgently required to develop a new system that comprehensively collects and analyzes power information in substations scattered in each region, and comprehensively determines abnormal conditions and stores and stores them at all times.

Accordingly, the present invention has been made to improve the above-described problems, and is comprehensively provided with power information in a plurality of substations scattered for each region to comprehensively analyze abnormalities to automatically determine a failure type, and It is an object of the present invention to provide an abnormal state information providing apparatus of a substation that can be integrated into a database of integrated fault information.

An apparatus for providing abnormal state information of a substation according to an aspect of the present invention may include at least one power information acquisition unit configured to collect power information of each accessory device in a substation scattered for each region and transmit each of them through remote communication. Receives power information of each substation transmitted from one or more power information acquisition units, classifies each information data, and analyzes each classified power information data based on the data of the fault reference waveform to determine whether there is an error and the type of error. The integrated abnormality determination module for storing the fault information and displaying the screen separately, and providing the data of the fault reference waveform to the integrated abnormality determination module, and saving the power information for updating and storing the failure information data for each analysis type determined as an abnormal state. It characterized in that it comprises a module.

In the present invention, the at least one power information acquisition unit, a local sensor for acquiring the power information in each of the main accessories of the substation in charge, the power information collection unit for collecting power information through the local sensor in real time, and An analog-digital converter for digitally converting power information in the form of an analog signal collected from a power information collection unit, and transmitting the digitally converted power information data through the analog-to-digital converter to the integrated abnormality determination module remotely; And a data transmission unit.

In addition, the at least one power information acquisition unit using a GPS receiver for receiving a GPS signal transmitted from a GPS satellite to obtain the position coordinates of each accessory device of the substation in charge, and the GPS information of the GPS signal received from the GPS receiver And a GPS synchronizer configured to add the location information and standard time information of each subsidiary device of the responsible substation, and the data head of the power information data so that the power information data is synchronized with the standard time. The data transmitter may remotely transmit the location information and power information data to which standard time information is added through the GPS synchronizer.

In the present invention, the integrated abnormality determination module receives power information data for each accessory device of each charge substation respectively transmitted from the at least one or more power information acquisition units, and separates data for each device to restore data. A digital-analog converter for converting each piece of power information data received through the data receiver and separated and restored for each data into an analog signal; and converting the power information signal analog-converted through the digital-analog converter into the power; The abnormal state is determined by comparing with the failure reference waveform provided by the information storage module. When the abnormal state is determined, the failure type is determined based on the result of comparison with the information of the failure reference waveform to generate the failure type information. The abnormality is determined by using the determination unit and the free trigger function. Is based on the occurrence time to extract data for a particular time domain provided to the electric power data storage module, it characterized in that it comprises a display and landscape tree refused to display the fault type and the fault waveform.

In addition, the data receiving unit, by using the standard time information contained in the data head of each of the power information data, the data obtained from each subsidiary equipment of the different substations at the same time, characterized in that to finally restore the data.

The display and pretriggers may be configured to delete power information in a steady state by using a pretrigger function, and selectively store and screen display only power information data in case of failure.

The power information storage module stores an overvoltage waveform signal for each fault condition of each subsidiary device of the substation obtained by EMTP simulation, and determines whether the overvoltage waveform signal for each fault condition is abnormal to the integrated fault determination module. A fault reference waveform database serving as a fault reference waveform, and fault information and fault type information of an abnormal state provided from the integrated fault determination module are received and combined with overvoltage waveform data for each fault condition from the fault reference waveform database. And a failure information storage database for updating and storing data of the reference failure waveform newly generated by the neuro purge.

In the present invention, the neuro purge unit, when the constant of the system changes due to the addition or change of substations and connected transmission lines, and the natural frequency and overvoltage of each fault waveform is changed, the actual fault condition occurs in the existing reference waveform When the natural frequency and magnitude change by comparing the waveforms, a new fault reference waveform is generated by correcting the fault reference waveform by multiplying the basic waveform information by a weight in consideration of the past number of faults, and converting the newly corrected fault reference waveform. The data is upgraded by storing the data in the fault reference waveform database.

According to the present invention made as described above, by collecting and analyzing various power information in the substation for each region at a remote location comprehensively, by determining the failure comprehensively to automatically determine the type of failure, so that it can be databased, It is not necessary to have a separate system for identifying and analyzing abnormalities by each substation, which can greatly reduce the system construction cost, and it is possible to determine the fault information of substations in each region in an integrated manner. Intensive management and repair can be done efficiently.

1 is a diagram showing a fault recording waveform calculated by a fault recorder provided in a conventional substation.
FIG. 2 is a view illustrating a state in which an overvoltage waveform appears at a transformer stage when a circuit breaker operates in a conventional substation.
3 is a diagram illustrating a configuration of an apparatus for providing abnormal state information of a substation according to an embodiment of the present invention.
4 is a diagram illustrating a detailed configuration of a power information acquisition unit in an apparatus for providing abnormal state information of a substation according to an embodiment of the present invention.
5 is a diagram illustrating a format of basic power information data generated by a power information acquisition unit of each substation in the apparatus for providing abnormal state information of a substation according to an embodiment of the present invention.
FIG. 6 is a diagram illustrating a format of integrated power information data obtained by collecting power information generated at the same time from a power information acquisition unit of a substation for each region in an apparatus for providing abnormal state information of a substation according to an embodiment of the present invention.
7A to 7F are diagrams illustrating overvoltage waveforms obtained by EMTP simulation in the apparatus for providing abnormal state information of a substation according to an embodiment of the present invention.
8 is a diagram illustrating an analysis state of input overvoltage in an apparatus for providing abnormal state information of a substation according to an embodiment of the present invention.

Hereinafter, the present invention configured as described above will be described in detail with reference to the accompanying drawings.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

3 is a diagram illustrating a configuration of an apparatus for providing abnormal state information of a substation according to an embodiment of the present invention, and FIG. 4 is a detail of a power information obtaining unit in the apparatus for providing abnormal state information of a substation according to an embodiment of the present invention. It is a figure which shows a structure.

As shown in FIG. 3, the apparatus for providing abnormal state information of a substation according to the present invention includes a plurality of power information acquisition units A1 to An that always acquire power information in a substation in charge scattered by region. Integrated abnormality determination module 100 for comprehensively receiving power information for each substation acquired from power information acquisition units A1 to An, and determining whether there is an error, providing reference information according to a previously stored fault reference waveform, and providing the integrated abnormality. And a power information storage module 200 for updating the failure reference waveform by using the power information when determining an abnormality from the determination module 100.

As shown in FIG. 4, the plurality of power information acquisition units A1 to An include a power information acquisition unit 10, an analog-digital conversion unit 20, a GPS receiver 30, and a GPS synchronization unit 40. ), And a data transmitter 50.

The power information collecting unit 10 has a local sensor installed in each main device of the substation in charge to obtain power information such as voltage and current, and collects power information through the local sensor in real time.

In the substation in which the power information collecting unit 10 is located, various accessory devices such as a transformer, a lightning arrester, a GIS, a capacitor, a reactor, a breaker, a disconnector, etc. exist. In order to obtain the power information, the instruments related to each accessory device function as the local sensor.

The analog-to-digital converter 20 digitally converts power information in the form of an analog signal collected from the power information collection unit 10 by dividing the data by a predetermined time unit such as, for example, 1 minute unit, as shown in FIG. 5. Generates power information data.

The GPS receiver 30 receives a GPS signal transmitted from a GPS satellite to obtain position coordinates of each accessory device of the corresponding substation.

The GPS synchronizer 40 extracts location information and standard time information of a corresponding substation using GPS information of a GPS signal received from the GPS receiver 30, and extracts the analog-digital converter ( 20, the position information and the standard time information are added to the head of the digitally converted power information data so that the power information data is output in synchronization with the standard time.

That is, the GPS synchronizer 40 adds the location information and GPS standard time information of the corresponding substation device to the data head portion, as shown in FIG. 5, so that the generated power information data is located in a substation located in a certain area. Allows you to see what data is being created at which time on which device location.

The data transmitter 50 transmits the power information data to which the location information and the standard time information are added to the integrated abnormality determination module 100 remotely through the communication network through the GPS synchronizer 40.

Meanwhile, in FIG. 3, the integrated abnormality determination module 100 includes a data receiver 110, a digital-analog converter 120, an abnormal state determination unit 130, a display and a pretrigger 140. .

The data receiving unit 110 receives power information data for each accessory device of each charge substation respectively transmitted from each of the power information obtaining units A1 to An, separates the data for each device, and restores the data. By using the standard time information contained in each data head, the data obtained from the subsidiaries of different substations are sorted at the same time and finally restored.

As illustrated in FIG. 6, the data receiving unit 110 collects data of the same time using data received from each of the power information obtaining units A1 to An. At this time, the specific accessory device in the substation is referred to as a reference position. Based on the time information indicated in the position information (AS / S No. ****** 0 to AS / S No. ****** n) of the first device data head used as a reference. In this way, data at different positions of the same time are newly combined into data of each group unit.

The digital-analog converter 120 converts the power information data in the form of digital data from the power information acquisition units A1 to An received through the data receiver 110 and separated and restored for each data into an analog signal. do.

The abnormal state determination unit 130 compares the restored power information signal through the digital-analog converter 120 with a waveform of the failure reference signal provided by the power information storage module 200 to determine whether the abnormal state is present. When it is determined that the abnormal state is determined, the failure type is determined based on a result of comparing with the information of the failure reference waveform to generate failure type information.

The display and pretrigger unit 140 extracts data of a specific time region (for example, from 10 seconds to 1 minute) based on a time point when an abnormal state occurs due to a pretrigger (Free Trigger) function. Provided to the storage module 200, and displays the fault type and fault waveform so as to be recognized by the user on the basic display screen.

Here, the pretrigger function is to solve the disadvantage of requiring a huge data storage capacity by storing all the steady state information when there is no failure, so that the storage capacity can be optimized by storing only data in case of failure.

In addition, the power information storage module 200 includes a failure reference waveform database 210, a neuro purge unit 220, and a failure information storage database 230.

The fault reference waveform database 210 stores an overvoltage waveform signal for each fault condition of each subsidiary device of a substation obtained by EMTP simulation, and the fault voltage overvoltage waveform signal for each fault condition is abnormal in the fault state determining unit 130. The waveform is provided as a basis for determining whether or not.

The neuro purge unit 220 receives the actual failure waveform data at the time when the failure occurs by the display and the pretrigger function of the pretrigger unit 140, and each failure condition from the failure reference waveform database 210 is received. Combined with the star overvoltage waveform data to create a new reference fault waveform.

The failure information storage database 230 updates and stores data of a reference failure waveform newly generated by the neuro purge unit 220.

7A to 7F are diagrams illustrating overvoltage waveforms obtained by EMTP simulation in the apparatus for providing abnormal state information of a substation according to an embodiment of the present invention.

Each overvoltage waveform shown in FIGS. 7A to 7F is an example of an overvoltage waveform obtained by an actual failure waveform or an EMTP (electron transient analysis program) simulation.

FIG. 7A shows the waveform of the input overvoltage, FIG. 7B shows the open / close overvoltage waveform, FIG. 7C shows the TRV overvoltage waveform, and FIG. 7D shows a short time overvoltage waveform of the commercial frequency. 7e shows a resonant overvoltage waveform, and FIG. 7f shows a lightning lightning voltage generated by a lightning strike.

In the fault reference waveform database 210, as in the example of each of the overvoltage waveforms shown in Figs. 7A to 7F, overvoltage obtained by actual observation or EMTP simulation according to each failure condition that may occur in each accessory device in a substation. The waveform is stored and presented as a reference waveform to the abnormal state determination unit 130.

On the other hand, taking the waveform of the lightning lightning voltage shown in FIG. 7F as an example, under the influence of the same lightning strike at the same time in four different places in the substation, the information of the same type of waveform is basically the same, but the lightning lightning overvoltage information having different sizes can be obtained. The reference waveform may be compared with the actual failure waveform of the power information data received from the specific power information acquisition unit to suggest a cause of the failure.

In addition, the overvoltage waveform for each fault condition stored in the fault reference waveform database 210 can detect and calculate the natural frequency of the waveform for each fault condition as shown in FIG. The purge unit 220 is used as basic information when comparing and analyzing fault conditions.

The neuro purge unit 220 may be configured in the existing reference waveform in preparation for the possibility that the natural frequency and overvoltage magnitude of each fault waveform change when the system constant changes due to the addition or change of a substation and a connected transmission line. When the natural frequency and magnitude of the actual failure condition are compared and the natural frequency and magnitude are changed, a new fault reference waveform is generated by correcting the fault reference waveform by multiplying the basic waveform information by weight (for example, 0.01 to 0.99) in consideration of the number of past faults. It has a function to upgrade the data of the fault reference waveform database 210 accordingly.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill 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. I will understand. Accordingly, the technical scope of the present invention should be defined by the following claims.

10: power information collection unit 20: analog-to-digital conversion unit
30: GPS receiver 40: GPS synchronizer
50: data transmission unit 100: integrated fault determination module
110: data receiving unit 120: digital-to-analog converter
130: abnormal state determination unit 140: display and pretrigger rejection
200: power information storage module 210: fault reference waveform database
220: Neuro fuzzy part 230: Fault information storage database

Claims (8)

At least one power information acquisition unit for collecting power information of each accessory device in substations scattered for each region and transmitting the power information through remote communication;
Receive power information for each substation transmitted from the at least one power information acquisition unit, classify the information by each information data, and analyze the classified power information data based on the data of the fault reference waveform to determine whether or not there is an error. Integrated fault determination module for storing the failure information and screen display by dividing the type; And
And a power information storage module for providing data of a failure reference waveform to the integrated abnormality determination module and updating and storing failure information data for each analysis type determined as an abnormal condition. The method of claim 1,
The at least one power information acquisition unit, a local sensor for acquiring the power information in each of the main accessories of the substation in charge, the power information collection unit for collecting power information through the local sensor in real time;
An analog-digital converter for digitally converting power information in the form of an analog signal collected from the power information collector;
And a data transmission unit for transmitting the power information data digitally converted through the analog-digital conversion unit to the integrated abnormality determination module remotely through a communication network. 3. The method of claim 2,
The at least one power information acquisition unit, a GPS receiver for receiving a GPS signal transmitted from a GPS satellite to obtain the position coordinates of each accessory device of the substation;
The location information for each accessory device of the substation obtained by using the GPS information of the GPS signal received from the GPS receiver and standard time information are added to the data head of the power information data, so that the power information data is standard. It further comprises a GPS synchronizer for outputting in synchronization with the time,
The apparatus for providing abnormal state information of a substation, wherein the data transmitter remotely transmits position information and power information data to which standard time information is added through the GPS synchronizer. The method of claim 1,
The integrated abnormality determination module may include: a data receiver configured to receive power information data for each accessory device of each of the substations respectively transmitted from the at least one power information acquirer, and to separate and restore data for each device data;
A digital-analog converter for converting each power information data received through the data receiver and separated and restored for each data into an analog signal;
The power information signal analog-converted through the digital-analog converter is compared with a failure reference waveform provided by the power information storage module to determine whether an abnormal state is detected, and when the abnormal state is determined, the power information signal is compared with information of the failure reference waveform. An abnormal state determination unit for determining a failure type based on a result and generating failure type information;
A display and pretrigger that extract data of a specific time domain based on the time when an abnormal state occurs using the free trigger function and provide it to the power information storage module, and display the fault type and fault waveform on the screen. Abnormal state information providing apparatus of a substation, characterized in that it comprises a rejection. The method according to claim 3 or 4,
The data receiver, by using the standard time information contained in the data head of each power information data, the data obtained from each subsidiary equipment of different substations at the same time to finally restore the data of the substation, characterized in that Informational device. 5. The method of claim 4,
The display and pretrigger unit deletes power information in a normal state by using a pretrigger function, and selectively stores and displays only power information data in case of failure. . The method of claim 1,
The power information storage module stores an overvoltage waveform signal for each fault condition of each subsidiary device of the substation obtained by EMTP simulation, and the fault criterion for determining whether the overvoltage waveform signal for each fault condition is abnormal to the integrated fault determination module. Fault reference waveform database to provide as a waveform,
A neuro purge unit which receives the fault information of the fault condition and the fault type information provided from the integrated fault determination module and combines the overvoltage waveform data for each fault condition from the fault reference waveform database to generate a new reference fault waveform;
And a failure information storage database for updating and storing data of a reference failure waveform newly generated by said neuro purge unit. The method of claim 7, wherein
The neuro purge unit changes a constant of a system by adding or changing a substation and a connected transmission line, and when a natural frequency and an overvoltage of each fault waveform change, compares a waveform having an actual fault condition in a conventional reference waveform. When the natural frequency and magnitude change, a new fault reference waveform is generated by correcting the fault reference waveform by multiplying the basic waveform information by a weight in consideration of the past fault number, and converts the newly corrected fault reference waveform into the fault reference waveform. Abnormal state information providing apparatus of a substation, characterized in that for upgrading the data stored in the database.

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