CN107977507A - A kind of electric power system fault characteristic quantity modeling method based on fault recorder data - Google Patents

Abstract

The present invention provides a power system fault feature quantity modeling method based on fault wave recording data. Based on the fault wave recording data, a power system primary equipment model is established, and the primary equipment model is associated with the wave recording channel in the fault wave recording file. , to obtain the wave recording analysis model; extract the fault wave recording data for a period of time before and after the fault time, and calculate the fault characteristic quantities of each primary equipment component; store the wave recording analysis model and fault characteristic quantities in the database for fault diagnosis and accident analysis . The present invention analyzes wave recording data from multiple angles, digitizes and quantizes wave recording sampling information with feature quantities of different dimensions, and obtains fault feature quantities of multiple dimensions, which can ensure the realization of various advanced applications; The structured wave recording data is transformed into a structured fault feature quantity model, which improves the operational reliability and rapidity of other advanced applications.

Description

A Modeling Method of Power System Fault Feature Quantities Based on Fault Recording Data

technical field

The invention relates to the technical field of electric power systems, in particular to a method for modeling fault characteristic quantities of electric power systems based on fault wave recording data.

Background technique

After a power system failure occurs, power system dispatching analysts urgently need to analyze the cause of the failure, resolve the failure, and resume power transmission. Currently known intelligent fault diagnosis systems generally focus on the judgment of fault components and the location of fault locations. However, there is no effective method for diagnosis and analysis of the deep-seated cause analysis of the accident and the assessment of the health status of the primary and secondary equipment. The fault recording data records the high-speed sampling data of the primary and secondary systems when the power system fails, so it can be used for fault analysis and diagnosis. However, in practical applications, the signal access volume of the fault recording device is limited. Generally, each substation is equipped with multiple fault recording devices. In this way, the actual power grid operation information is scattered and recorded in different wave recording data files. However, the fault recording data is sampled at high speed, and the comprehensive analysis of the recording data generated by different devices puts forward very high requirements on the clock precision, which creates obstacles for in-depth analysis.

To sum up, in the prior art, the comprehensive analysis of the wave recording data generated by different devices puts forward high requirements on the clock accuracy, and causes obstacles to in-depth analysis, and there is still no effective solution .

Contents of the invention

In order to overcome the deficiencies of the prior art above, the present invention provides a power system fault feature quantity modeling method based on fault recording data, which takes the time of fault occurrence as the dividing point and takes the primary equipment element of the power system as the unit to extract faults respectively Various fault feature quantities of specified time windows before and after form intermediate data to provide data support for other advanced applications, thereby overcoming the limitation of the fault recording file itself.

The technical scheme adopted in the present invention is:

A method for modeling power system fault characteristic quantities based on fault recording data, comprising the following steps:

Based on the fault recording data, establish a power system primary equipment model, associate the primary equipment model with the recording channel in the fault recording file, and obtain the recording analysis model;

Extract the fault recording data within a period of time before and after the fault moment, and calculate the fault feature quantity of each primary equipment component;

Store the wave recording analysis model and fault feature quantities in the database for use in fault diagnosis and accident analysis.

Further, based on the fault recording data, the primary equipment model of the power system is established, and the primary equipment model is associated with the recording channel in the fault recording file to obtain a recording analysis model, including:

Based on the fault recording data in each fault recording file, establish a power system primary equipment model;

Add the channel numbers of multiple analog channels and multiple switch channels corresponding to each fault recording file in the primary equipment model to form a recording analysis model.

Further, the wave recording analysis model includes a bus model, a transmission line model, a transformer model, a circuit breaker model and a protection device model;

Wherein, the bus model includes the name of the bus, the number of the bus, the voltage level, the number of the relevant protection device, the number of the relevant circuit breaker equipment, and the voltage channel number in the corresponding wave recording data;

The transmission line model includes line name, line number, voltage level, line impedance parameter, line length, related protection device number, related circuit breaker equipment number, and current channel number in the corresponding wave recording data;

The transformer model includes the name of the transformer, the number of the transformer, the volume of the transformer on two or three sides, and the number of the relevant protection device;

The circuit breaker model includes the switch channel number and the signal type of the switch in the corresponding fault recording file;

The protection device model includes the channel number of the switching value in the corresponding fault record file and the signal type of the switching value.

Further, after the wave recording analysis model is obtained, when a fault occurs, the current mutation point is obtained by traversing the waveform data, and the waveform alignment of the multi-fault wave recording data is performed according to the current mutation point.

Further, the fault feature quantity includes voltage and current effective value before and after the fault, 1-20th harmonic value, DC component and time decay constant, sequence component, differential current value, line measurement impedance, frequency feature quantity, fault distance measurement feature Quantities, protection action characteristic quantities, circuit breaker action characteristic quantities and waveform data; primary equipment components include busbars, transmission lines, transformers and circuit breakers.

Further, extract the fault recording data for a period of time before and after the fault time, and calculate the voltage and current effective value, 1-20th harmonic value, DC component and time decay constant, sequence component, differential current value, Line measurement impedance, frequency characteristic quantity, fault location characteristic quantity, protection action characteristic quantity and circuit breaker action characteristic quantity, including:

Extract the fault recording data for a period of time before and after the fault time from each fault recording file;

For a period of time from before the fault to after the fault, take a point every 5ms, and calculate the voltage and current effective value, 1-20th harmonic value, DC Component and time decay constant, sequence component, differential current value, line measurement impedance, frequency characteristic quantity, fault distance measurement characteristic quantity, protection action characteristic quantity and circuit breaker action characteristic quantity;

From the moment of reclosing to the time after reclosing, take a point every 5ms, and calculate the voltage and current effective value, 1-20 harmonic value, DC component and time decay constant, sequence component, differential current value, line measurement impedance, frequency characteristic quantity, fault location characteristic quantity, protection action characteristic quantity and circuit breaker action characteristic quantity.

Further, extract the fault recording data for a period of time before and after the fault time, and calculate the waveform data before and after the fault of each primary equipment component, including:

Extract the waveform data of the three-phase voltage corresponding to the busbar, the waveform data of the three-phase voltage and three-phase current corresponding to the line, and the waveform data of the three-phase voltage and three-phase current corresponding to each side of the transformer and the neutral point from each fault recording file. Waveform data and the waveform data of the three-phase current corresponding to the circuit breaker;

Unify and normalize the extracted waveform data, and calculate the primary value of the 3-cycle waveform data before the failure of each primary equipment component, the 10-cycle waveform data after the failure, and the 10-cycle waveform data after reclosing;

According to the COMTRADE file format, the waveform data of 3 cycles before the failure of each primary equipment component, the waveform data of 10 cycles after the fault and the primary value of the waveform data of 10 cycles after reclosing are stored.

A power system fault characteristic quantity modeling device based on fault recording data, suitable for the above-mentioned power system fault characteristic quantity modeling method based on fault recording data, including:

The primary equipment model establishment module is used to establish the primary equipment model of the power system based on the fault recording data;

The wave recording analysis model building module is used to associate the primary equipment model with the wave recording channel in the fault wave recording file to obtain the wave record analysis model;

The data extraction module is used to extract the fault recording data of a period of time before and after the fault time from each fault recording file;

The fault characteristic quantity calculation module is used to calculate the fault characteristic quantity of each primary equipment element according to the fault recording data within a period of time before and after the extracted fault moment;

The storage module is used for storing wave recording analysis models and fault feature quantities for use in fault diagnosis and accident analysis.

Further, it also includes:

The waveform alignment module is used to find the abrupt point by traversing the waveform data when a fault occurs, and perform waveform alignment of multi-fault recording data.

Compared with prior art, the beneficial effect of the present invention is:

(1) On the basis of the fault recording data, the present invention models the primary equipment of the power system, associates the primary equipment model with the recording channel in the fault recording data file, and obtains the recording analysis model. , according to the mutation characteristics of voltage and current, the waveform alignment of multi-wave recording data can be carried out;

(2) The present invention extracts the fault recording data of a period of time before and after the fault time respectively from each fault recording file, takes the primary equipment element as a unit, carries out the calculation of the fault feature quantity of each primary equipment element, forms intermediate data, overcomes The limitation of the fault recording file itself provides a more accurate and reliable data source for advanced applications such as single-end ranging, double-end ranging, waveform fusion, analysis and evaluation of protection action behavior, and analysis of primary and secondary equipment characteristics when a fault occurs. Can better meet the needs of various analysis;

(3) The present invention analyzes the wave recording data from multiple angles, digitizes and quantizes the wave recording sampling information with feature quantities of different dimensions, and obtains fault feature quantities of multiple dimensions, which can ensure the realization of various advanced applications ;Transform unstructured wave recording data into structured fault feature quantities, improve single-end distance measurement, double-end distance measurement, waveform fusion, analysis and evaluation of protection action behavior, and analysis of primary and secondary equipment characteristics when faults occur, etc. Reliable and fast operation of advanced applications.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application, and do not constitute improper limitations to the present application.

Fig. 1 is a flow chart 1 of a power system fault feature quantity modeling method based on fault recording data disclosed in an embodiment of the present invention;

Fig. 2 is the second flow chart of the power system fault feature quantity modeling method based on fault recording data disclosed by the embodiment of the present invention;

Fig. 3 is a block diagram of a power system fault feature quantity modeling device based on fault recording data disclosed by an embodiment of the present invention.

Detailed ways

It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

As introduced in the background technology, in the prior art, fault recording data is sampled at high speed, and the comprehensive analysis of the recording data generated by different devices puts forward very high requirements on the clock accuracy, which poses a serious problem for in-depth analysis. In order to solve the above technical problems, this application proposes a power system fault feature quantity modeling method based on fault recording data, taking the time of fault occurrence as the demarcation point, and taking the primary equipment element of the power system as the unit, Various fault feature quantities of the specified time window before and after the fault are extracted separately to form intermediate data to provide data support for other advanced applications, thereby overcoming the limitation of the fault recording file itself.

In a typical implementation of the present application, as shown in Figure 1, a method for modeling power system fault characteristic quantities based on fault recording data is provided, the method includes the following steps:

Step 101: Based on the fault recording data, establish a power system primary equipment model, associate the primary equipment model with the recording channel in the fault recording file, and obtain the recording analysis model;

Step 102: extracting the fault recording data within a period of time before and after the fault moment, and calculating the fault feature quantity of each primary equipment element;

Step 103: Store the recorded wave analysis model and the fault feature quantity in the database for use in fault diagnosis and accident analysis.

The power system fault feature quantity modeling method based on the fault record data proposed in this embodiment, the fault record data as high-speed sampling data, can reflect the power system operation characteristics at the time of the fault to the greatest extent, based on the fault record data , to model the primary equipment of the power system, and correlate with the recording channel in the fault recording file; when a fault occurs, perform waveform alignment of multiple recording data according to the sudden change characteristics of voltage and current; Time is the demarcation point, with the primary equipment components of the power system as the unit, the various fault characteristic quantities of the specified time window before and after the fault are calculated separately to form intermediate data, which provides data support for fault diagnosis and accident analysis applications, thereby breaking the fault recording file itself limits.

In order to make those skilled in the art better understand the present invention, a more detailed embodiment is listed below. As shown in Figure 2, this implementation provides a power system fault feature modeling method based on fault record data, including:

Step 201: Based on the fault recording data, establish a power system primary equipment model, associate the primary equipment model with the recording channel in the fault recording file, and obtain a recording analysis model.

Step 2011: Based on the fault recording data, establish a power system primary equipment model.

The fault recording data is collected by the fault recording device, and the fault recording data is stored in the fault recording file format. Based on the fault recording data in each fault recording data file, a power system primary equipment model is established. The primary equipment module mainly includes Bus information, transmission line information, transformer information, circuit breaker information and protection device information.

Step 2012: Associate the primary equipment model with the wave recording channel in the fault record file to obtain the wave record analysis model.

Taking the transmission line information as an example, a line is associated with 4 analog channels and several switch channels in the fault record file. The 4 analog channels are A-phase current channel, B-phase current channel, C-phase current channel and zero-sequence current channel of the line. A number of switching channels are mainly protection action signals, reclosing signals and circuit breaker position signals for protecting the line.

The wave recording analysis model includes a bus model, a transmission line model, a transformer model, a protection device model and a circuit breaker model;

Wherein, the bus model includes the name of the bus, the number of the bus, the voltage level, the number of the related protection device, the number of the related circuit breaker, and the number of the voltage channel in the corresponding wave recording data.

The transmission line model includes line name, line number, voltage level, line impedance parameter, line length, related protection device number, related circuit breaker equipment number, and current channel number in the corresponding wave recording data.

The transformer model includes transformer name, transformer number, two- or three-side transformer volume, and related protection device numbers. The volume of the transformer to which it belongs includes the wiring method, the number of the relevant protection device and the number of the relevant circuit breaker, and the corresponding voltage channel number and current channel number in the wave recording data.

The circuit breaker model includes the switch channel number and the signal type of the switch in the corresponding fault recording file;

The protection device model includes the channel number of the switching value in the corresponding fault record file and the signal type of the switching value.

There are interrelationships among busbars, transmission lines, transformers, circuit breakers, and protection devices in the power system. Busbars, lines, transformers and circuit breakers are the primary equipment of the power system, and the protection device is the secondary equipment of the power system; the protection device monitors the voltage, current and other information on the primary equipment, and when it senses the abnormality of the power system, it controls the circuit breaker, Then cut off the load on the busbar, line, and transformer to achieve the purpose of protecting the busbar, line, and transformer, and finally ensure the safety and stability of the power system. Therefore, by abstracting the relationship between the five types of equipment in the real world, the relationship between the five models in the fault analysis is obtained. The relationship between the five models is specifically:

The relationship between busbar, circuit breaker and protective device model is: the busbar is the final object to be protected, the protective device is the object to be protected, and the circuit breaker is the bridge to realize this protection. Therefore, by adding a circuit breaker number and multiple protection device numbers to the bus information, the association between the three can be achieved.

The relationship between transmission line, circuit breaker and protection device model is as follows: the line is the final object to be protected, the protection device is the object to implement protection, and the circuit breaker is the bridge to realize this protection. Therefore, by adding 1 or 2 circuit breaker numbers and multiple protection device numbers to the line information, the association between the three can be achieved.

Relationship among transformer, circuit breaker and protection device models: Transformer is the final object to be protected, protection device is the object to implement protection, and circuit breaker is the bridge to realize this protection. Therefore, by adding 1 to 3 circuit breaker numbers and multiple protection device numbers to the transformer information, the association between the three can be achieved.

Associate the primary equipment model with the recording channel in the fault recording file, and obtain the specific implementation methods of each recording analysis model as follows:

When the protection device protects the primary equipment, it will send a protection trip signal and a reclose signal to the circuit breaker. The reaction in the channel of the wave recording file is the protection triple trip signal, A phase trip signal, B phase trip signal, C phase trip signal and reclosing signal in the wave recording file switch channel. Therefore, a set of protection devices is related to multiple switching channels in the wave recording file. The specific implementation is to increase the channel numbers of the corresponding switching channels in the fault recording file in the protection device model.

The collection of circuit breaker information in the power system includes two types: circuit breaker current and circuit breaker position. The current response of the circuit breaker is the four analog channels of ABCN in the wave recording file. The position of the circuit breaker reflects the connection status of the busbar, line, transformer and other parts of the power system. It is reflected in the wave recording file as multiple switching channels, such as the closing position of phase A, the closing position of phase B, the closing position of phase C, the closing position of A Phase opening position, phase B opening position and phase C opening position. The specific realization is that in the circuit breaker model, the channel numbers of multiple analog channels and multiple digital channels corresponding to the fault record file are added.

Transformers are generally divided into two-winding transformers and three-winding transformers, and each side winding contains voltage and current information. It is reflected in the wave recording file that there are multiple analog channels. Taking the high voltage side as an example, it corresponds to the high voltage side A phase voltage, the high voltage side B phase voltage, the high voltage side C phase voltage, the high voltage side zero sequence voltage, the high voltage side in the wave recording file. Phase A current on the high voltage side, phase B current on the high voltage side, phase C current on the high voltage side, and zero sequence current on the high voltage side. The situation is similar for the medium pressure side and the low pressure side. The specific implementation is to add three-side windings to the transformer side model, and add multiple analog channel numbers corresponding to the fault record file to the winding information on each side.

In the power system, the collection of transmission line information is the ABC three-phase current and zero-sequence current of the line. The specific implementation is to add the corresponding multiple analog channel numbers in the wave recording file to the line model information.

The collection of bus information in the power system is the ABC three-phase voltage and zero-sequence voltage of the bus. The specific implementation is to add multiple analog channel numbers corresponding to the fault record file in the bus model information.

In addition, when a fault occurs, the current will change suddenly, and the sudden change point can be found by traversing the waveform data. Although the times of multiple fault recording files will not be highly consistent, since they are all collected from the same fault recording data, it reflects Therefore, the mutation point in each fault recording file is actually the same moment. According to this characteristic, the waveform alignment of multiple recording data can be carried out.

Step 202: Extract the fault recording data for a period of time before and after the fault time, and calculate the fault feature quantity of each primary equipment component with the primary equipment component as the unit, wherein the fault feature quantity includes the voltage and current effective value before and after the fault, and the harmonic value, DC component and time decay constant, sequence component, difference, line measurement impedance, frequency characteristic quantity, fault distance measurement characteristic quantity, protection action characteristic quantity, circuit breaker action characteristic quantity and waveform data; primary equipment components include busbar, power transmission Lines, transformers and circuit breakers.

Step 2021: Extract the fault recording data for a period of time before and after the fault time from each fault recording data file.

The fault recording data within 3 cycles before the fault, 9 cycles after the fault, and 9 cycles after reclosing are extracted from each fault recording data file.

Step 2022: Taking the primary equipment element as the unit, calculate the voltage and current effective value of each primary equipment element before and after the fault, the harmonic value before and after the fault, the DC component and the time decay constant, the sequence component, the difference, the line measurement impedance, the frequency characteristic quantity, the fault Distance measurement feature quantity, protection action feature quantity, circuit breaker action feature quantity and waveform data.

Step 2022-1: Calculate the voltage and current RMS feature quantities of each primary equipment element before and after the fault.

(1) Calculate the effective value of the voltage before and after the bus fault

Calculate the effective value and phase value of the ABC three-phase voltage 3 cycles before the bus fault, 9 cycles after the fault, and 9 cycles after reclosing, that is, within 3 cycles before the bus fault, 9 cycles after the fault, and 9 cycles after reclosing, each Take a point at an interval of 5ms, and calculate the effective value and phase value of the three-phase voltage at this point. If the effective value data of the first point is the effective value and phase value of the three-phase voltage at 60ms before the bus fault, then the effective value data at the second point is the effective value and phase value of the three-phase voltage at 55ms before the fault, And so on, until the effective value and phase value of the three-phase voltage at 180ms after the fault are obtained; then calculate the effective value and phase value of the three-phase voltage every 5ms from the moment of bus reclosing until the time at 180ms after the bus reclosing is obtained For the effective value and phase value of the three-phase voltage, calculate the effective value and phase value data of the three-phase voltage at 86 points in the 3 cycles before the bus fault, 9 cycles after the fault, and 9 cycles after reclosing.

(2) Calculate the effective value of the voltage before and after the fault of the transmission line

Calculate the effective value and phase value of the ABC three-phase voltage 3 cycles before the fault, 9 cycles after the fault, and 9 cycles after reclosing, that is, within 3 cycles before the fault of the transmission line, 9 cycles after the fault, and 9 cycles after reclosing , take a point every 5ms, and calculate the effective value and phase value of the three-phase voltage at this point. If the effective value data of the first point is the effective value and phase value of the three-phase voltage at 60ms before the transmission line fault, then the effective value data of the second point is the effective value and phase value of the three-phase voltage at 55ms before the transmission line fault value, and so on, until the effective value and phase value of the three-phase voltage at 180ms after the transmission line fault is obtained; and then an effective value and phase value of the three-phase voltage are calculated every 5ms from the reclosing time of the transmission line until the transmission line The effective value and phase value of the three-phase voltage at 180 ms after reclosing, calculate the three-phase effective value and phase value data of 86 points within 3 cycles before the transmission line fault, 9 cycles after the fault, and 9 cycles after reclosing.

(3) Calculate the effective value of the current before and after the fault of the transmission line

Calculate the effective value and phase value of the ABC three-phase current 3 cycles before the fault of the transmission line, 9 cycles after the fault, and 9 cycles after reclosing, that is, within 3 cycles before the fault of the transmission line, 9 cycles after the fault, and 9 cycles after reclosing , take a point every 5ms, and calculate the effective value and phase value of the three-phase circuit at this point. For example, the effective value data of the first point is the effective value and phase value of the three-phase current at 60ms before the transmission line fault, and the effective value data of the second point is the effective value and phase value of the three-phase current at 55ms before the transmission line fault , and so on, until the effective value and phase value of the three-phase current at 180ms after the transmission line fault is obtained; then, the effective value and phase value of the three-phase current are calculated at intervals of 5ms from the reclosing time of the transmission line until the transmission line fault is obtained Calculate the effective value and phase value of the three-phase current at 180ms after the line reclosing, and calculate the effective value and phase value of the three-phase current at 86 points within 3 cycles before the transmission line fault, 9 cycles after the fault, and 9 cycles after reclosing data.

(4) Calculate the effective value of voltage/current on each side before and after the transformer fault

Calculate the 3-cycle wave before the transformer fault, 9-cycle wave after the fault, and 9-cycle wave after reclosing, the three-phase voltage, three-phase current effective value and phase value of the high-voltage side, medium-voltage side, and low-voltage side of the transformer, that is, the 3-cycle wave before the transformer fault, Within 9 cycles after the fault and 9 cycles after reclosing, take a point every 5ms, and calculate the effective value and phase value of the three-phase voltage, three-phase current on the high-voltage side, medium-voltage side, and low-voltage side of the transformer at this point. If the effective value data of the first point is the three-phase voltage, three-phase current effective value and phase value of the high-voltage side, medium-voltage side and low-voltage side of the transformer 60ms before the fault, the effective value data of the second point is the fault The effective value and phase value at the first 55ms, and so on, until the three-phase voltage and three-phase current effective value and phase value of the high-voltage side, medium-voltage side, and low-voltage side of the transformer at 180ms after the fault; Start to calculate the three-phase voltage, three-phase current effective value and phase value of the high-voltage side, medium-voltage side and low-voltage side of the transformer at an interval of 5ms until the transformer high-voltage side, medium-voltage side and low-voltage side at 180ms after the transformer recloses. The effective value and phase value of the three-phase voltage and three-phase current, calculate the three-phase of the high voltage side, the medium voltage side and the low voltage side of the transformer at 86 points within 3 cycles before the transformer fault, 9 cycles after the fault, and 9 cycles after reclosing RMS and phase value data of voltage and three-phase current.

(5) Calculate the effective value of the neutral point current before and after the transformer fault

Calculate the 3 cycles before the transformer fault, 9 cycles after the fault, 9 cycles after reclosing, the effective value and phase value of the neutral point voltage and neutral point current on each side of the transformer, that is, the 3 cycles before the transformer fault, 9 cycles after the fault, Within 9 cycles after reclosing, take a point every 5ms, and calculate the neutral point voltage, neutral point current effective value and phase value of each side of the transformer at this point. For example, the effective value data of the first point is the effective value and phase value of the neutral point voltage and neutral point current of each side of the transformer at 60ms before the fault, then the second point data is the neutral point at each side of the transformer at 55ms before the fault Point voltage, effective value and phase value of neutral point current, and so on, until the neutral point voltage, effective value and phase value of neutral point current on each side of the transformer at 180ms after the fault are obtained; then start from the moment of transformer reclosing Calculate the effective value and phase value of the neutral point voltage, neutral point current and phase value of each side of the transformer every 5ms until the neutral point voltage and neutral point voltage of each side of the transformer at 180ms after the transformer is reclosed are obtained. For the effective value and phase value of the current, calculate the effective value and phase value of the neutral point voltage and neutral point current of 86 points in each side of the transformer within 3 cycles before the transformer fault, 9 cycles after the fault, and 9 cycles after reclosing.

(6) Calculate the effective value of the current before and after the circuit breaker fault

Calculate the effective value and phase of the ABC three-phase current 3 cycles before the breaker fault, 9 cycles after the fault, and 9 cycles after reclosing, that is, within 3 cycles before the fault of the circuit breaker, 9 cycles after the fault, and 9 cycles after reclosing, Take a point every 5ms, and calculate the effective value and phase of the three-phase current at this point. For example, the effective value data of the first point is the effective value and phase value of the three-phase current at 60ms before the fault, the effective value data of the second point is the effective value and phase value of the three-phase current at 55ms before the fault, and so on, Until the effective value and phase value of the three-phase current at 180ms after the fault is obtained; then calculate the effective value and phase value of the three-phase current at intervals of 5ms from the moment of reclosing of the circuit breaker until the three-phase current at 180ms after reclosing of the circuit breaker is obtained For the effective value and phase value of the phase current, calculate the effective value and phase data of the three-phase current at 86 points within 3 cycles before the breaker fault, 9 cycles after the fault, and 9 cycles after reclosing.

Step 2022-2: Calculate the 1-20th harmonic effective value of each primary equipment element before and after the fault.

(1) Calculate the harmonic value before and after the bus fault

Calculate the 2nd harmonic value and phase value of the ABC three-phase voltage 3 cycles before the bus fault, 9 cycles after the fault, and 9 cycles after reclosing, that is, within 3 cycles before the bus fault, 9 cycles after the fault, and 9 cycles after reclosing , take a point every 5ms, and calculate the 2nd harmonic value and phase value of the three-phase voltage at this point. If the harmonic value data of the first point is the second harmonic value and phase value of the three-phase voltage at 60ms before the bus fault, then the harmonic value data of the second point is the second harmonic value of the three-phase voltage at 55ms before the fault Harmonic value and phase value, and so on, until the 2nd harmonic value and phase value of the three-phase voltage at 180ms after the bus fault; then calculate the 2nd harmonic of the three-phase voltage every 5ms from the moment of bus reclosing value and phase value, until the second harmonic value and phase value of the three-phase voltage at 180ms after bus reclosing are obtained, and the 86 points within 3 cycles before bus fault, 9 cycles after fault, and 9 cycles after reclosing are calculated The 2nd harmonic value and phase value of the three-phase voltage.

In the same way, the 3rd to 20th harmonic values and phase values of the ABC three-phase voltage are calculated sequentially for the 3 cycles before the bus fault, 9 cycles after the fault, and 9 cycles after reclosing.

(2) Calculate the harmonic value before and after the transmission line fault

Calculate the 2nd harmonic value and phase value of the ABC three-phase current 3 cycles before the fault of the transmission line, 9 cycles after the fault, and 9 cycles after reclosing, that is, 3 cycles before the fault of the transmission line, 9 cycles after the fault, and 9 cycles after reclosing In the cycle, take a point every 5ms, and calculate the 2nd harmonic value and phase value of the three-phase voltage at this point. For example, the harmonic value data at the first point is the second harmonic value and phase value of the three-phase current at 60ms before the transmission line fault, and the harmonic value data at the second point is the three-phase current at 55ms before the transmission line fault The 2nd harmonic value and phase value, and so on, until the 2nd harmonic value and phase value of the three-phase current at 180ms after the transmission line fault; then calculate a three-phase current 2 every 5ms from the reclosing time of the transmission line Subharmonic value and phase value, up to 2nd harmonic value and phase value at 180ms after reclosing. A total of 86 points of RMS and phase data.

In the same way, the 3rd to 20th harmonic values and phase values of the ABC three-phase current of the 3 cycles before the fault, 9 cycles after the fault, and 9 cycles after reclosing are calculated in turn.

(3) Calculate the harmonic value before and after the transformer fault

Calculate the 2nd harmonic value and phase value of the ABC three-phase current on each side of the high-voltage side, medium-voltage side, and low-voltage side of the transformer for 3 cycles before the transformer fault, 9 cycles after the fault, and 9 cycles after reclosing, that is, before the transformer fault 3 Within the cycle, 9 cycles after a fault, and 9 cycles after reclosing, take a point every 5ms, and calculate the 2nd harmonic value and phase value of the three-phase current on each side of the transformer at this point. For example, the harmonic value data of the first point is the second harmonic value and phase value of the three-phase current on each side of the transformer at 60ms before the fault, and the harmonic value data of the second point is the three-phase current at each side of the transformer at 55ms before the fault. The 2nd harmonic value and phase value of the phase current, and so on, until the 2nd harmonic value and phase value of the three-phase current on each side of the transformer at 180ms after the fault are obtained; and then calculate a transformer every 5ms from the reclosing moment of the transformer The 2nd harmonic value and phase value of the three-phase current on each side until the 2nd harmonic value and phase value of the three-phase current on each side of the transformer at 180ms after the transformer reclosing is obtained, and a total of 3 cycles before the fault and after the fault are calculated 9 cycles, 2nd harmonic value and phase value data of the three-phase current on each side of the transformer at 86 points within 9 cycles after reclosing.

In the same way, the 3rd to 20th harmonic values and phase value data of the three-phase currents on each side of the transformer are calculated sequentially for 3 cycles before the transformer fault, 9 cycles after the fault, and 9 cycles after reclosing.

(4) Calculate the harmonic value before and after the transformer neutral point current fault

Calculate the 2nd harmonic value and phase of the neutral point three-phase current on each side of the high-voltage side, medium-voltage side, and low-voltage side of the 3-cycle wave before the transformer fault, 9 cycles after the fault, and 9 cycles after reclosing, that is, the 3-cycle wave before the transformer fault , 9 cycles after the fault, and 9 cycles after reclosing, take a point every 5ms, and calculate the 2nd harmonic value and phase value of the neutral point three-phase current on each side of the transformer at this point. For example, the harmonic value data of the first point is the 2nd harmonic value and phase value of the neutral point three-phase current on each side of the transformer 60ms before the transformer fault, then the harmonic value data of the second point is 55ms before the transformer fault The second harmonic value and phase value of the neutral point three-phase current on each side of the transformer, and so on, until the second harmonic value and phase value of the neutral point three-phase current on each side of the transformer at 180ms after the transformer fault; and then Calculate the second harmonic value and phase value of the neutral point three-phase current on each side of the transformer at intervals of 5ms from the moment of transformer reclosing until the 2 harmonic value and phase value of the neutral point three-phase current on each side of the transformer at 180ms after the transformer reclosing is obtained Subharmonic value and phase value, calculate the 2nd harmonic value and phase value data of the neutral point three-phase current on each side of the transformer at 86 points within 3 cycles before the transformer fault, 9 cycles after the fault, and 9 cycles after reclosing .

In the same way, the 3rd to 20th harmonic value and phase value data of the neutral point three-phase current on each side of the transformer are calculated sequentially for 3 cycles before the transformer fault, 9 cycles after the fault, and 9 cycles after reclosing.

(5) Calculate the harmonic value before and after the circuit breaker fault

Calculate the 2nd harmonic value and phase value of the ABC three-phase current 3 cycles before the circuit breaker fault, 9 cycles after the fault, and 9 cycles after reclosing, that is, 3 cycles before the circuit breaker fault, 9 cycles after the fault, and after reclosing Within 9 cycles, take a point every 5ms, and calculate the 2nd harmonic value and phase value of the three-phase current at this point. For example, the harmonic value data of the first point is the second harmonic value and phase value of the three-phase current at 60ms before the circuit breaker fault, then the harmonic value data of the second point is the three-phase current at 55ms before the circuit breaker fault The 2nd harmonic value and phase value of the circuit breaker, and so on, until the 2nd harmonic value and phase value of the three-phase current at 180ms after the circuit breaker fault; and then calculate a three-phase current every 5ms from the reclosing moment of the circuit breaker The second harmonic value and phase value of the three-phase current until 180ms after the reclosing of the circuit breaker; a total of 3 cycles before the circuit breaker fault, 9 cycles after the fault, and 9 cycles after reclosing The second harmonic value and phase value of the three-phase current at 86 points in the cycle.

In the same way, the 3rd to 20th harmonic value and phase value data of the ABC three-phase current of the 3 cycles before the circuit breaker fault, 9 cycles after the fault, and 9 cycles after reclosing are calculated in sequence.

Step 2022-3: Calculate the DC component and time decay constant of each primary equipment element before and after the fault.

(1) Calculate the DC component and time decay constant of the transmission line

Calculate the DC component and time decay constant of the ABC three-phase current of the transmission line 3 cycles before the fault, 9 cycles after the fault, and 9 cycles after reclosing, that is, within 3 cycles before the line fault, 9 cycles after the fault, and 9 cycles after reclosing , take a point every 5ms, and calculate the DC component and time decay constant of the three-phase current at this point. If the DC component data of the first point is the DC component and time decay constant of the three-phase current at 60ms before the transmission line fault, the DC component data of the second point is the DC component and the time decay constant of the three-phase current at 55ms before the transmission line fault The time decay constant, and so on, until the DC component and time decay constant of the three-phase current at 180ms after the transmission line fault is obtained; then calculate the DC component and time decay constant of a three-phase current every 5ms from the reclosing moment of the transmission line, Until the DC component and time decay constant of the three-phase current at 180ms after the reclosing of the transmission line are obtained, the DC of the three-phase current at 86 points within 3 cycles before the fault of the transmission line, 9 cycles after the fault, and 9 cycles after the reclosing are calculated. Component and time decay constant data.

(2) Calculate the DC component and time decay constant of the circuit breaker

Calculate the DC component and time decay constant of the ABC three-phase current 3 cycles before the circuit breaker fault, 9 cycles after the fault, and 9 cycles after reclosing, that is, 3 cycles before the circuit breaker fault, 9 cycles after the fault, and 9 cycles after reclosing , take a point every 5ms, and calculate the DC component and time decay constant of the three-phase current at this point. If the DC component data of the first point is the DC component and time decay constant of the three-phase current at 60ms before the breaker fault, the DC component data of the second point is the DC component and the time decay constant of the three-phase current at 55ms before the circuit breaker fault Time decay constant, and so on, until the DC component and time decay constant of the three-phase current at 180ms after the circuit breaker fault is obtained; then calculate the DC component and time decay constant of a three-phase current every 5ms from the moment of circuit breaker reclosing, Until the DC component and time decay constant of the three-phase current at 180ms after the reclosing of the circuit breaker are obtained, the DC of the three-phase current at 86 points within 3 cycles before the circuit breaker fault, 9 cycles after the fault, and 9 cycles after reclosing are calculated. components and time decay constants.

Step 2022-4: Calculate the pre-fault and post-sequence components with the primary equipment element as the unit.

(1) Calculate the voltage sequence components before and after the bus fault

Calculate the positive-sequence phase, negative-sequence phase and zero-sequence phase of the voltage 3 cycles before the bus fault, 9 cycles after the fault, and 9 cycles after reclosing, that is, 3 cycles before the bus fault, 9 cycles after the fault, and 9 cycles after reclosing Take a point every 5ms, and calculate the positive-sequence phase, negative-sequence phase and zero-sequence phase of the voltage at this point. If the sequence component data of the first point is the positive sequence phase, negative sequence phase and zero sequence phase of the voltage at 60ms before the bus fault, then the sequence component data of the second point is the positive sequence phase, sequence phase and zero-sequence phase, and so on until the positive-sequence phase, negative-sequence phase, and zero-sequence phase of the voltage at 180ms after the bus fault are obtained, and then the positive-sequence phase, negative-sequence phase, and Sequence phase, zero-sequence phase, until the positive sequence phase, negative sequence phase, and zero-sequence phase of the voltage at 180ms after bus reclosing are obtained, and a total of 3 cycles before the bus fault, 9 cycles after the fault, and 9 cycles after reclosing are calculated. 86 Positive-sequence phase, negative-sequence phase and zero-sequence phase data of the voltage at each point.

(2) Calculate the voltage sequence components before and after the transmission line fault

Calculate the positive-sequence phase, negative-sequence phase and zero-sequence phase of the voltage of 3 cycles before the fault of the transmission line, 9 cycles after the fault, and 9 cycles after reclosing, that is, 3 cycles before the fault of the transmission line, 9 cycles after the fault, and after reclosing Within 9 cycles, take a point every 5ms, and calculate the positive sequence phase, negative sequence phase and zero sequence phase of the voltage at this point. For example, the voltage sequence component data of the first point is the positive sequence phase, negative sequence phase and zero sequence phase of the voltage 60ms before the transmission line fault, and the voltage sequence component data of the second point is the positive sequence phase of the voltage 55ms before the transmission line fault. Sequence phase, negative sequence phase and zero sequence phase, and so on, until the positive sequence phase, negative sequence phase and zero sequence phase of the voltage at 180ms after the transmission line fault are obtained; then a voltage is calculated every 5ms from the reclosing time of the transmission line The positive-sequence phase, negative-sequence phase and zero-sequence phase of the transmission line until the positive-sequence phase, negative-sequence phase and zero-sequence phase of the voltage at 180ms after the reclosing of the transmission line are obtained, and a total of 3 cycles before the fault of the transmission line and 9 cycles after the fault are calculated , Positive-sequence phase, negative-sequence phase and zero-sequence phase data of voltage at 86 points within 9 cycles after reclosing.

(3) Calculate the current sequence components before and after the transmission line fault

Calculate the current positive-sequence phase, negative-sequence phase and zero-sequence phase of 3 cycles before the fault of the transmission line, 9 cycles after the fault, and 9 cycles after reclosing, that is, 3 cycles before the fault of the transmission line, 9 cycles after the fault, and 9 cycles after reclosing In the cycle, take a point every 5ms, and calculate the positive sequence phase, negative sequence phase and zero sequence phase of the current at this point. If the current sequence component data of the first point is the positive sequence phase, negative sequence phase and zero sequence phase of the current at 60ms before the transmission line fault, the current sequence component data of the second point is the current at 55ms before the transmission line fault Positive-sequence phase, negative-sequence phase and zero-sequence phase, and so on, until the positive-sequence phase, negative-sequence phase and zero-sequence phase of the current at 180ms after the fault of the transmission line are obtained; then one is calculated every 5ms from the reclosing time of the transmission line The positive-sequence phase, negative-sequence phase and zero-sequence phase of the current until the positive-sequence phase, negative-sequence phase and zero-sequence phase of the current at 180ms after the reclosing of the transmission line are obtained, and a total of 3 cycles before the fault of the transmission line and 9 cycles after the fault are calculated. Positive-sequence phase, negative-sequence phase and zero-sequence phase data of current at 86 points within 9 cycles of cycle and reclosing.

(4) Calculate the voltage and current sequence components on each side before and after the transformer fault

Calculate the positive-sequence phase, negative-sequence phase and zero-sequence phase of the voltage and current on the high-voltage side, medium-voltage side, and low-voltage side of the transformer for 3 cycles before the transformer fault, 9 cycles after the fault, and 9 cycles after reclosing, that is, before the transformer fault Within 3 cycles, 9 cycles after a fault, and 9 cycles after reclosing, take a point every 5ms, and calculate the positive sequence phase, negative sequence phase and zero sequence phase of the voltage and current on each side of the transformer at this point. For example, the voltage and current sequence component data of the first point is the positive sequence phase, negative sequence phase and zero sequence phase of the voltage and current on each side of the transformer at 60ms before the transformer fault, and the voltage and current sequence component data of the second point is at the 55ms before the transformer fault positive sequence phase, negative sequence phase and zero sequence phase of the voltage and current on each side of the transformer, and so on, until the positive sequence phase, negative sequence phase and zero sequence phase of the voltage and current on each side of the transformer at 180ms after the transformer fault are obtained; then from the transformer Calculate the positive sequence phase, negative sequence phase and zero sequence phase of the voltage and current on each side of the transformer at intervals of 5ms from the time of reclosing until the positive sequence phase, negative sequence phase and Zero-sequence phase, calculate the positive-sequence phase, negative-sequence phase and zero-sequence phase data of the voltage and current on each side of the transformer at 86 points within 3 cycles before the transformer fault, 9 cycles after the fault, and 9 cycles after reclosing.

(5) Calculate the current sequence components before and after the circuit breaker fault

Calculate the positive-sequence phase, negative-sequence phase and zero-sequence phase of the current of 3 cycles before a circuit breaker fault, 9 cycles after a fault, and 9 cycles after reclosing, that is, 3 cycles before a circuit breaker fault, 9 cycles after a fault, and after reclosing Within 9 cycles, take a point every 5ms, and calculate the positive sequence phase, negative sequence phase and zero sequence phase of the flow at this point. For example, the current sequence component data of the first point is the positive sequence phase, negative sequence phase and zero sequence phase of the current 60ms before the fault, and the current sequence component data of the second point is the positive sequence phase and negative sequence phase of the current 55ms before the fault. Phase and zero-sequence phase, and so on, until the positive-sequence phase, negative-sequence phase and zero-sequence phase of the current at 180ms after the breaker fault are obtained, and then calculate the positive-sequence phase, Negative-sequence phase and zero-sequence phase until the positive-sequence phase, negative-sequence phase and zero-sequence phase of the current at 180ms after reclosing of the circuit breaker are obtained, and a total of 3 cycles before the circuit breaker fault, 9 cycles after the fault, and 9 cycles after reclosing are calculated. Positive-sequence phase, negative-sequence phase and zero-sequence phase data of current at 86 points within a cycle.

Step 2022-5: Calculate the differential current values of the primary equipment elements before and after the fault.

(1) Calculate the differential current value before and after the bus fault

Calculate the differential current value and phase value of the ABC three-phase voltage 3 cycles before the bus fault, 9 cycles after the fault, and 9 cycles after reclosing, that is, within 3 cycles before the bus fault, 9 cycles after the fault, and 9 cycles after reclosing, Take a point every 5ms, and calculate the differential current value and phase value of the three-phase voltage at this point. For example, the differential current value data at the first point is the differential current value and phase value of the three-phase voltage at 60 ms before the bus fault, and the differential current value data at the second point is the differential current value and phase value of the three-phase voltage at 55 ms before the bus fault. Phase value, and so on, until the differential current value and phase value of the three-phase voltage at 180ms after the bus fault; then calculate a differential current value and phase value of the three-phase voltage every 5ms from the bus reclosing moment until the bus recloses The differential current value and phase value of the three-phase voltage at 180ms after the gate is calculated, and the differential current value and phase data of the three-phase voltage of 86 points in the 3 cycles before the bus fault, 9 cycles after the fault, and 9 cycles after reclosing are calculated.

(2) Calculate the differential current value before and after the transmission line fault

Calculate the difference current value and phase value of the ABC three-phase current 3 cycles before the fault of the transmission line, 9 cycles after the fault, and 9 cycles after reclosing, that is, 3 cycles before the fault of the transmission line, 9 cycles after the fault, and 9 cycles after reclosing Take a point every 5ms, and calculate the differential current value and phase value of the three-phase current at this point. For example, the differential current value data of the first point is the differential current value and phase value of the three-phase current at 60ms before the transmission line fault, and the differential current value data of the second point is the differential current of the three-phase current at 55ms before the transmission line fault value and phase value, and so on, until the differential current value and phase value of the three-phase current at 180ms after the transmission line fault is obtained; and then calculate a differential current value and phase value of the three-phase current at intervals of 5ms from the reclosing time of the transmission line , until the differential current value and phase value at 180ms after the reclosing of the transmission line, calculate the differential current value and phase of the three-phase current at 86 points within the 3 cycles before the transmission line fault, 9 cycles after the fault, and 9 cycles after reclosing data.

(3) Differential current value before and after transformer fault

Calculate the differential current value and phase value of the ABC three-phase current 3 cycles before the transformer fault, 9 cycles after the fault, and 9 cycles after reclosing, that is, within 3 cycles before the transformer fault, 9 cycles after the fault, and 9 cycles after reclosing, Take a point every 5ms, and calculate the differential current value and phase value of the three-phase current at this point. For example, the differential current value data at the first point is the differential current value and phase value of the three-phase current at 60ms before the transformer fault, and the differential current value data at the second point is the differential current value and the phase value of the three-phase current at 55ms before the transformer fault. Phase value, and so on, until the differential current value and phase value of the three-phase current at 180ms after the transformer fault; then calculate a differential current value and phase value of the three-phase current every 5ms from the moment of transformer reclosing until the transformer reclosing The differential current value and phase value of the three-phase current at the last 180ms, and calculate the differential current value and phase data of the three-phase current at 86 points in the 3 cycles before the transformer fault, 9 cycles after the fault, and 9 cycles after reclosing.

Step 2022-6: Calculate the measured impedance of the line before and after the fault.

The data of each point of line measurement impedance includes A-phase ground, B-phase ground, C-phase ground, AB-phase, BC-phase, CA-phase measured impedance and phase. Take values from 60ms before the fault to 180ms after the fault, and then from the time of reclosing to 180ms after reclosing; take a point every 5ms, and calculate the line measurement impedance data of 86 points before and after the line fault.

Step 2022-7: Calculate the frequency characteristic quantities of the bus before and after the fault.

The data of each point of the frequency characteristic quantity includes the frequency value of the bus ABC three-phase. From 60ms before the fault to 180ms after the fault, and then from the time of reclosing to 180ms after reclosing, take a point every 5ms, and calculate the frequency characteristic data of 86 points before and after the bus fault.

Step 2022-8: Calculate the fault distance measurement feature quantities of the lines before and after the fault.

The characteristic quantities of fault location mainly include the single-end ranging results of the local station, the single-ended ranging results of the opposite station, the double-ended ranging results and the excessive impedance value of the line. Each fault line contains a set of fault location feature quantities. From 60ms before the fault to 180ms after the fault, and then from the time of reclosing to 180ms after reclosing, take a point every 5ms, and calculate the fault distance characteristic data of 86 points before and after the line fault.

Step 2022-9: Calculate the protection action characteristic quantity before and after the fault.

A set of protection action feature quantities include primary protection equipment information, first protection action time (divided into ABC three-phase), protection action phase difference, automatic reset time (divided into ABC three-phase), protection reactivation time (divided into ABC three-phase ), the protection moves again.

From 60ms before the fault to 180ms after the fault, and then from the time of reclosing to 180ms after reclosing, take a point every 5ms, and calculate the protection action characteristic data of 86 points before and after the fault.

Step 2022-10: Calculate the action feature quantity of the circuit breaker before and after the fault.

A group of circuit breaker action feature quantities include relevant primary equipment information, the first tripping time of the circuit breaker (divided into ABC three-phase), circuit breaker tripping phase, fault removal time on the waveform (divided into ABC three-phase), and switching value reclosing time (ABC three-phase), coincidence time on the waveform (ABC three-phase), circuit breaker trip time again (ABC three-phase), circuit breaker re-trip phase, waveform re-fault removal time (ABC three-phase) , Integral energy (divided into ABC three-phase).

From 60ms before the fault to 180ms after the fault, and then from the time of reclosing to 180ms after reclosing, take a point every 5ms, and calculate the protection action feature data of 86 points before and after the circuit breaker action fault.

Step 2022-11: Calculate the waveform data of each primary equipment element before and after the fault.

The original waveform data is uniformly normalized to a sampling frequency of 5kHz, that is, 100 sampling points per cycle, and the primary value of the waveform data of 3 cycles before the fault of each primary equipment component, the waveform data of 10 cycles after the fault and the waveform data of 10 cycles after reclosing are calculated. According to the ASCII standard in the COMTRADE format, the waveform data of 3 cycles before the failure of each primary equipment component, the waveform data of 10 cycles after the fault and the waveform data of 10 cycles after reclosing are respectively stored. The data of each sampling point are separated by English half-width commas.

(1) Calculate the waveform data before and after the bus fault

Extract the waveform data of the three-phase voltage of the four channels of ABCN corresponding to the bus from the fault recording data file, normalize the waveform data of the three-phase voltage to a sampling frequency of 5kHz, and calculate the waveform data of the 3 cycles before the bus fault and after the fault 10-cycle waveform data and primary value of 10-cycle waveform data after reclosing, and store 3-cycle waveform data before fault, 10-cycle waveform data after fault and primary value of 10-cycle waveform data after reclosing.

(2) Calculate the waveform data before and after the transmission line fault

Extract the waveform data of the three-phase current corresponding to the four channels of ABCN from the fault recording data file, normalize the waveform data of the three-phase current to a sampling frequency of 5kHz, and calculate the waveform data of the 3 cycles before the fault of the transmission line and after the fault 10-cycle waveform data and primary value of 10-cycle waveform data after reclosing, and store 3-cycle waveform data before fault, 10-cycle waveform data after fault and primary value of 10-cycle waveform data after reclosing.

(3) Calculate the waveform data of each side before and after the transformer fault

Extract the waveform data of the three-phase voltage and the waveform data of the three-phase current of the 12 channels corresponding to the ABCN of the three sides of the transformer from the fault recording data file, and compare the waveform data of the three-phase voltage and the waveform of the three-phase current The data is uniformly normalized to a sampling frequency of 5kHz, and the waveform data of 3 cycles before the fault, 10 cycles after the fault and the primary value of the 10 cycles after reclosing are calculated on each side of the transformer, and the waveform data of 3 cycles before the fault on each side of the transformer are stored. The 10-cycle waveform data after the fault and the primary value of the 10-cycle waveform data after reclosing.

(4) Store the neutral point current waveform data before and after the transformer fault

Extract the three-phase current waveform data corresponding to the four channels of ABCN at the neutral point of the transformer from the fault recording data file, and normalize the three-phase waveform data to a sampling frequency of 5kHz to calculate the three-cycle waveform before the transformer neutral point fault Data, 10-cycle waveform data after fault and primary value of 10-cycle waveform data after reclosing, store the primary value of 3-cycle waveform data before transformer neutral point fault, 10-cycle waveform data after fault and 10-cycle waveform data after reclosing. The data of each sampling point are separated by English half-width commas.

(5) Store the waveform data before and after the circuit breaker fault

Extract the waveform data of the three-phase current of the circuit breaker corresponding to the four channels of ABCN from the fault recording data file, normalize the waveform data of the three-phase current to a sampling frequency of 5kHz, and calculate the waveform data of the three cycles before the fault of the circuit breaker, fault The waveform data of the last 10 cycles and the primary value of the waveform data of 10 cycles after reclosing, and store the waveform data of 3 cycles before the fault of the circuit breaker, the waveform data of 10 cycles after the fault and the primary value of the waveform data of 10 cycles after reclosing.

Step 203: Store the wave recording analysis model and fault feature quantities in the database for use in fault diagnosis and accident analysis.

The power system fault characteristic quantity modeling method based on the fault recording data proposed by the embodiment of the present invention establishes a power system primary equipment model based on the fault recording data, and combines the primary equipment model with the recording wave in the fault recording data file The channels are associated to obtain the wave recording analysis model; the fault wave data is extracted for a period of time before and after the fault time, and the fault feature quantities of each primary equipment component are calculated to provide data support for subsequent fault analysis.

Corresponding to the method embodiment shown in FIG. 1 and FIG. 2, as shown in FIG. 3, this embodiment provides a power system fault feature quantity modeling device based on fault recording data, which device includes:

The primary equipment model establishment module is used to establish the primary equipment model of the power system based on the fault recording data;

The wave recording analysis model building module is used to associate the primary equipment model with the wave recording channel in the fault wave recording data file to obtain the wave record analysis model;

The data extraction module is used to extract the fault recording data for a period of time before and after the fault time from each fault recording data file;

The fault characteristic quantity calculation module is used to extract the fault recording data within a period of time before and after the fault moment, and calculate the fault characteristic quantity of each primary equipment component;

The storage module is used for storing wave recording analysis models and fault feature quantities for use in fault diagnosis and accident analysis.

Further, the power system fault feature quantity modeling device based on fault record data also includes:

The waveform alignment module is used to find the abrupt point by traversing the waveform data when a fault occurs, and perform waveform alignment of multi-fault recording data.

In addition, the fault feature calculation module is specifically used for:

For a period of time from before the fault to after the fault, take a point every 5ms, and calculate the voltage and current effective value, 1-20 harmonic value, DC component and time decay constant, sequence component, differential current value, line measurement impedance, frequency characteristic quantity, fault location characteristic quantity, protection action characteristic quantity and circuit breaker action characteristic quantity;

Then, within the time range from the reclosing moment to the time after reclosing, take a point every 5ms, and calculate the voltage and current effective value and 1-20th harmonic of each primary device before and after the fault at this point according to the fault recording data at this point. value, DC component and time decay constant, sequence component, differential current value, line measurement impedance, frequency characteristic quantity, fault distance measurement characteristic quantity, protection action characteristic quantity and circuit breaker action characteristic quantity.

The power system fault characteristic quantity modeling device based on the fault recording data proposed by the embodiment of the present invention uses the primary equipment model building module to establish a power system primary equipment model, and uses the wave recording analysis model building module to combine the primary equipment model with the fault recording data Correlate the wave recording channels in the file to obtain the wave recording analysis model; extract the fault wave recording data within a period of time before and after the fault time through the data extraction module, and calculate the fault feature quantity of each primary equipment component through the fault feature quantity calculation module, and store The module provides data support for subsequent failure analysis.

Although the specific implementation of the present invention has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, those skilled in the art do not need to pay creative work Various modifications or variations that can be made are still within the protection scope of the present invention.

Claims (9)

1. A power system fault characteristic quantity modeling method based on fault recording data, is characterized in that, comprises the following steps: Based on the fault recording data, establish a power system primary equipment model, associate the primary equipment model with the recording channel in the fault recording file, and obtain the recording analysis model; Extract the fault recording data within a period of time before and after the fault moment, and calculate the fault feature quantity of each primary equipment component; Store the wave recording analysis model and fault feature quantities in the database for use in fault diagnosis and accident analysis. 2. the power system fault feature quantity modeling method based on fault recording data according to claim 1, it is characterized in that, described based on fault recording data, set up a power system primary equipment model, the primary equipment model and fault recording Correlate the wave recording channels in the wave file to get the wave recording analysis model, including: Based on the fault recording data in each fault recording file, establish a power system primary equipment model; Add the channel numbers of multiple analog channels and multiple switch channels corresponding to each fault recording file in the primary equipment model to form a recording analysis model. 3. the power system fault feature quantity modeling method based on fault record data according to claim 1, is characterized in that, described wave record analysis model comprises busbar model, transmission line model, transformer model, circuit breaker model and protection device model; Wherein, the bus model includes the name of the bus, the number of the bus, the voltage level, the number of the relevant protection device, the number of the relevant circuit breaker equipment, and the voltage channel number in the corresponding wave recording data; The transmission line model includes line name, line number, voltage level, line impedance parameter, line length, related protection device number, related circuit breaker equipment number, and current channel number in the corresponding wave recording data; The transformer model includes the name of the transformer, the number of the transformer, the volume of the transformer on two or three sides, and the number of the relevant protection device; The circuit breaker model includes the switch channel number and the signal type of the switch in the corresponding fault recording file; The protection device model includes the channel number of the switching value in the corresponding fault record file and the signal type of the switching value. 4. the power system fault feature quantity modeling method based on fault recording data according to claim 1, it is characterized in that, after obtaining the recording analysis model, when a fault occurs, the current mutation point is obtained by traversing the waveform data, according to Waveform alignment of multi-fault recording data at the current mutation point. 5. The power system fault feature quantity modeling method based on fault recording data according to claim 1, wherein the fault feature quantity includes voltage and current effective values before and after the fault, 1-20th harmonic value, DC Component and time decay constant, sequence component, differential current value, line measurement impedance, frequency characteristic quantity, fault distance measurement characteristic quantity, protection action characteristic quantity, circuit breaker action characteristic quantity and waveform data; primary equipment components include busbar, transmission line, Transformers and circuit breakers. 6. The power system fault characteristic quantity modeling method based on fault recording data according to claim 4, is characterized in that, extracting the fault recording data in a period of time before and after the fault time, calculating the voltage and current of each primary equipment element before and after the fault Effective value, 1-20th harmonic value, DC component and time decay constant, sequence component, differential current value, line measurement impedance, frequency characteristic quantity, fault distance measurement characteristic quantity, protection action characteristic quantity and circuit breaker action characteristic quantity, include: Extract the fault recording data for a period of time before and after the fault time from each fault recording file; For a period of time from before the fault to after the fault, take a point every 5ms, and calculate the voltage and current effective value, 1-20th harmonic value, DC Component and time decay constant, sequence component, differential current value, line measurement impedance, frequency characteristic quantity, fault distance measurement characteristic quantity, protection action characteristic quantity and circuit breaker action characteristic quantity; From the moment of reclosing to the time after reclosing, take a point every 5ms, and calculate the voltage and current effective value, 1-20 harmonic value, DC component and time decay constant, sequence component, differential current value, line measurement impedance, frequency characteristic quantity, fault location characteristic quantity, protection action characteristic quantity and circuit breaker action characteristic quantity. 7. The power system fault feature quantity modeling method based on fault record data according to claim 4, is characterized in that, extract the fault record data in a period of time before and after the fault time, calculate the waveform data before and after each primary equipment element fault ,include: Extract the waveform data of the three-phase voltage corresponding to the bus, the waveform data of the three-phase voltage and current corresponding to the line, the waveform data of the three-phase voltage and current corresponding to each side of the transformer and the neutral point, and the open circuit from each fault recording file. The waveform data of the three-phase current corresponding to the device; Unify and normalize the extracted waveform data, and calculate the primary value of the 3-cycle waveform data before the failure of each primary equipment component, the 10-cycle waveform data after the failure, and the 10-cycle waveform data after reclosing; According to the COMTRADE file format, the waveform data of 3 cycles before the failure of each primary equipment component, the waveform data of 10 cycles after the fault and the primary value of the waveform data of 10 cycles after reclosing are stored. 8. A power system fault characteristic quantity modeling device based on fault recording data, suitable for the power system fault characteristic quantity modeling method based on fault recording data according to any one of claims 1-7, its features Yes, including: The primary equipment model establishment module is used to establish the primary equipment model of the power system based on the fault recording data; The wave recording analysis model building module is used to associate the primary equipment model with the wave recording channel in the fault wave recording file to obtain the wave record analysis model; The data extraction module is used to extract the fault recording data of a period of time before and after the fault time from each fault recording file; The fault characteristic quantity calculation module is used to calculate and calculate the fault characteristic quantity of each primary equipment element according to the fault recording data within a period of time before and after the extracted fault moment; The storage module is used for storing wave recording analysis models and fault feature quantities for use in fault diagnosis and accident analysis. 9. The power system fault characteristic quantity modeling device based on fault recording data according to claim 8, is characterized in that, also comprises: The waveform alignment module is used to find the abrupt point by traversing the waveform data when a fault occurs, and perform waveform alignment of multi-fault recording data.