CN104978482A - Fault cumulative effect assessment method for PSD-BPA-based batch processing transformer - Google Patents

Abstract

The present invention discloses a fault cumulative effect assessment method for PSD-BPA-based batch processing transformer and proposes the concept of fault cumulative effects. After the power system has the fault of short-circuit, calculating the cumulative effect on the equipment according to the obtained fault information and finally showing in graphical form so as to improved efficiency of using fault data; A cumulative effect value obtained from calculation can be ordered based on historical fault current transformer effect to provide transformer condition warning and equipment maintenance priority strategy so as to improve the stable working condition of network equipment and function as reference data of scheduling maintenance personnel making maintenance plan, thereby making maintenance plan become more directional and targeted so as to improve the processing speed and accuracy of information, reduce the manual costs and largely avoid human mistakes and errors.

Description

Based on PSD-BPA batch processing transformer fault cumulative effect appraisal procedure

Technical field

The present invention relates to a kind of based on PSD-BPA batch processing transformer fault cumulative effect appraisal procedure, belong to technical field of electric power automation.

Background technology

When electrical network is short-circuited fault, the passing through property short-circuit current that grid equipment flows through can produce certain impact to equipment, and cumulative effect is repeatedly larger on equipment impact for a long time.But the cumulative effect for short-circuit current lacks effective quantitative evaluating method, in addition, current research mainly concentrates on the impact analysis of short-circuit current to direct faulty equipment, seldom systematically considers that passing through property short-circuit current affects the cumulative effect of the whole network Other related equipment.

The assessment of power system transformer fault cumulative effect refers to, when electrical network is repeatedly short-circuited fault for a long time, and the cumulative effect assessment that the passing through property short-circuit current that transformer equipment flows through has an impact to equipment.To the method that it calculates be, when electrical network historical failure data cannot directly obtain from failure wave-recording file, based on electrical network historical failure data, rely on electric parameter and the method for operation of actual electric network, set up the batch processing phantom of short-circuit current, calculate after grid collapses, flow through the failed shorted electric current of transformer equipment, quantitative evaluation short-circuit current cumulative effect.

For calculating and the emulation of electric network fault short-circuit current, there is many ripe software both at home and abroad.The electromechanical transient software package PSD-BPA of China Power academy of sciences exploitation, this software package has the functions such as Load flow calculation, transient stability simulation calculation, calculation of short-circuit current, small interference stability calculating, has a wide range of applications in the power scheduling travelling mechanism of China, the relevant unit such as planning, design, test of electric system and each colleges and universities.This software is utilized to emulate electric network fault and calculate cumulative effect, need first to carry out Load flow calculation according to the method for operation of system, and manually for stablize file appointment based on power flow files, export stabilization result file need transformer equipment needed for manual extraction the current value of fault period go forward side by side pedestrian's work calculate, need use several software simultaneously and certain personal error may be caused, reduce efficiency.

Summary of the invention

In order to solve the problems of the technologies described above, the invention provides a kind of based on PSD-BPA batch processing transformer fault cumulative effect appraisal procedure.

In order to achieve the above object, the technical solution adopted in the present invention is:

Based on PSD-BPA batch processing transformer fault cumulative effect appraisal procedure, comprise the following steps,

Step one, failure definition is concentrated containing n+1 failure message, and wherein, n is historical failure information, and (n+1)th is current failure information;

Step 2, definition i=1;

Step 3, judges whether i equals n+1; If not, then go to step five, if so, then go to step four;

Step 4, resolves i-th failure message by the Fault analytical module in PSD-BPA, judges whether to extract fault current information, namely whether there is corresponding fault recorder data; If can not, then go to step five; If can, then the three-phase fault current instantaneous value I in fault recorder data is extracted according to failure message _fAi, I _fBi, I _fCi, and go to step seven;

Step 5, resolves i-th failure message by the Fault analytical module in PSD-BPA, from i-th failure message, extract fault data, and described fault data comprises fault type, time of failure and fault clearance time;

From i-th failure message, obtain i-th fault the moment occurs, the control documents generated after system operation mode file, transient stability Parameter File and fault occur, goes to step six;

Step 6, calls PSD-BPA transient stability simulated program by emulation module, obtains between i-th fault emergence period, flows through the three-phase fault current instantaneous value I of transformer equipment _fAi, I _fBi, I _fCi, go to step seven;

Step 7, by cumulative effect assessment models, calculates out of order cumulative effect value, goes to step eight;

Cumulative effect assessment models is,

$T_{\mathrm{fi}}=\max \left\{\begin{array}{c}{T}_{\mathrm{fA}0}+{\∫}_{t_0}^t{\mathrm{\ΔI}}_{\mathrm{fAi}}^2\left(t\right)\mathrm{dt}\\ T_{\mathrm{fB}0}+{\∫}_{t_0}^t{\mathrm{\ΔI}}_{\mathrm{fBi}}^2\left(t\right)\mathrm{dt}\\ T_{\mathrm{fC}0}+{\∫}_{t_0}^t{\mathrm{\ΔI}}_{\mathrm{fCi}}^2\left(t\right)\mathrm{dt}\end{array}\right.$

Wherein, T _fA0, T _fB0, T _fC0for the initialization cumulative effect value of each phase of transformer, Δ I _fAi, Δ I _fBi, Δ I _fCifor flowing through the passing through property failed shorted current differential of each phase of transformer, Δ I _fAi=I _fAi-I _fA0, Δ I _fBi=I _fBi-I _fB0, Δ I _fCi=I _fCi-I _fC0, I _fA0, I _fB0, I _fC0for the steady-state current value of each phase, T _fifor transformer stands the cumulative effect value of i-th fault, t ₀for the initial time of short-circuit current, t is the end time of short-circuit current;

Step 8, judges whether i is less than n+1, and if so, then i=i+1, goes to step three; If not, then go to step nine;

Step 9, stands out of order cumulative effect value by transformer and adds up, and obtains new cumulative effect value, and result is write on destination file and export;

Totalization formula is,

T _f＝K _f·∑T _fi(i＝1,2,...,n+1)

Wherein, K _ffor experiential modification coefficient.

Described failure message is the recorder data provided by protection wave recording device, through the data file that primary dcreening operation is formed.

Calculate to flow through between the fault emergence period transformer equipment the process of three-phase fault current instantaneous value be,

A1) start flow calculation program, load operating mode file, calculate the flow situations that the moment occurs fault, obtain power flow solutions file;

A2) resolve control documents, fail-safe control measure is transformed fault card and failure vanishes card, merges with transient stability Parameter File and write as interim calculation document;

A3) start steady calculation procedure temporarily, load power flow solutions file and interim calculation document, computer sim-ulation result, and Output simulation destination file;

A4) resolve fault message file, about the configuration information of fault in amendment short-circuit current calculation program control documents, load operating mode file and transient stability Parameter File, calculate calculation of short-circuit current result, and output short circuit current result of calculation file;

A5) resolve simulation result file and calculation of short-circuit current destination file, obtain to flow through between the fault emergence period transformer equipment three-phase fault current instantaneous value.

Flow through between the fault emergence period transformer equipment three-phase fault current instantaneous value can stored in interim findings file, after obtaining new cumulative effect value, this interim findings file erase.

Describedly adopt fault trigger mechanism based on PSD-BPA batch processing transformer fault cumulative effect appraisal procedure, real-time listening is carried out to fault set, when there being new failure message Write fault collection, Trigger update cumulative effect value

The beneficial effect that the present invention reaches: the concept that 1, the present invention proposes fault cumulative effect, after electric system is short-circuited fault, according to the failure message obtained, fault can be calculated to the cumulative effect of equipment, improves the utilization ratio for fault data; 2, the cumulative effect value that calculates of the present invention, can carry out the reference data of turnaround plan formulation, make turnaround plan have more directivity and specific aim as scheduling maintainer; 3, the present invention is by forming batch processing, improves processing speed and the accuracy of information, decreases manual operation cost, avoid human error and error to a great extent.

Accompanying drawing explanation

Fig. 1 is process flow diagram of the present invention.

Fig. 2 is Graphical output.

Embodiment

Below in conjunction with accompanying drawing, the invention will be further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.

As shown in Figure 1, based on PSD-BPA batch processing transformer fault cumulative effect appraisal procedure, comprise the following steps:

Step one, failure definition is concentrated containing n+1 failure message, and wherein, n is historical failure information, and (n+1)th is current failure information.

Step 2, definition i=1.

Step 3, judges whether i equals n+1; If not, then go to step five, if so, then go to step four.

Step 4, resolves i-th failure message by the Fault analytical module in PSD-BPA, judges whether to extract fault current information, namely whether there is corresponding fault recorder data; If can not, then go to step five; If can, then the three-phase fault current instantaneous value I in fault recorder data is extracted according to failure message _fAi, I _fBi, I _fCi, three-phase fault current instantaneous value stored in interim findings file, and goes to step seven.

Above-mentioned failure message is the recorder data provided by protection wave recording device, through the data file that primary dcreening operation is formed, is generally Excel form document.

Step 5, resolves i-th failure message by the Fault analytical module in PSD-BPA, from i-th failure message, extract fault data, and fault data comprises fault type, time of failure and fault clearance time; From i-th failure message, obtain i-th fault the moment occurs, system operation mode file (PSD-BPA form, * .dat), transient stability Parameter File (PSD-BPA form, * .swi) and the rear control documents (* .ctr) generated of fault generation, go to step six.

Step 6, calls PSD-BPA transient stability simulated program by emulation module, obtains between i-th fault emergence period, flows through the three-phase fault current instantaneous value I of transformer equipment _fAi, I _fBi, I _fCi, three-phase fault current instantaneous value, stored in interim findings file, goes to step seven.

Detailed process is as follows:

A1) start flow calculation program, load operating mode file, calculate the flow situations that the moment occurs fault, obtain power flow solutions file;

A2) resolve control documents, fail-safe control measure is transformed fault card and failure vanishes card, merges with transient stability Parameter File and write as interim calculation document;

PSD-BPA expresses different elements by the different card of definition, realize different functions, not about the card that reclosing and unsuccessful reclosing etc. are corresponding in PSD-BPA, realize these functions, need the method by timing simulation, such as will realize single-phase permanent earth short circuit jumps single-phase, unsuccessful rear this fault of jumping three-phase of reclosing, and single-phase fault card, single-phase fault disappearance card and three-phase fault card will be used respectively to simulate according to time sequencing;

A3) start steady calculation procedure temporarily, load power flow solutions file and interim calculation document, computer sim-ulation result, and Output simulation destination file;

A4) resolve fault message file, about the configuration information of fault in amendment short-circuit current calculation program control documents, load operating mode file and transient stability Parameter File, calculate calculation of short-circuit current result, and output short circuit current result of calculation file;

A5) resolve simulation result file and calculation of short-circuit current destination file, obtain to flow through between the fault emergence period transformer equipment three-phase fault current instantaneous value, three-phase fault current instantaneous value is stored in interim findings file.

Step 7, by cumulative effect assessment models, calculates out of order cumulative effect value, goes to step eight;

Cumulative effect assessment models is,

$T_{\mathrm{fi}}=\max \left\{\begin{array}{c}{T}_{\mathrm{fA}0}+{\∫}_{t_0}^t{\mathrm{\ΔI}}_{\mathrm{fAi}}^2\left(t\right)\mathrm{dt}\\ T_{\mathrm{fB}0}+{\∫}_{t_0}^t{\mathrm{\ΔI}}_{\mathrm{fBi}}^2\left(t\right)\mathrm{dt}\\ T_{\mathrm{fC}0}+{\∫}_{t_0}^t{\mathrm{\ΔI}}_{\mathrm{fCi}}^2\left(t\right)\mathrm{dt}\end{array}\right.$

Wherein, T _fA0, T _fB0, T _fC0for the initialization cumulative effect value of each phase of transformer, Δ I _fAi, Δ I _fBi, Δ I _fCifor flowing through the passing through property failed shorted current differential of each phase of transformer, Δ I _fAi=I _fAi-I _fA0, Δ I _fBi=I _fBi-I _fB0, Δ I _fCi=I _fCi-I _fC0, I _fA0, I _fB0, I _fC0for the steady-state current value of each phase, T _fifor transformer stands the cumulative effect value of i-th fault, t ₀for the initial time of short-circuit current, t is the end time of short-circuit current.

Step 8, judges whether i is less than n+1, and if so, then i=i+1, goes to step three; If not, then go to step nine.

Step 9, stands out of order cumulative effect value by transformer and adds up, and obtains new cumulative effect value, and result is write on destination file and export, and delete interim findings file, output here as shown in Figure 2, graphically exports.

Totalization formula is,

T _f＝K _f·∑T _fi(i＝1,2,...,n+1)

Wherein, K _ffor experiential modification coefficient.

Above-mentionedly adopt fault trigger mechanism based on PSD-BPA batch processing transformer fault cumulative effect appraisal procedure, real-time listening is carried out to fault set, when there being new failure message Write fault collection, Trigger update cumulative effect value.

Above-mentioned based on PSD-BPA batch processing transformer fault cumulative effect appraisal procedure, propose the concept of fault cumulative effect, after electric system is short-circuited fault, can according to the failure message obtained, calculate fault to the cumulative effect of equipment, finally graphically show, improve the utilization ratio for fault data; The cumulative effect value calculated, can sort according to the historical failure current accumulation effect of transformer, the early warning of transformer situation and overhaul of the equipments preference strategy are provided, contribute to the stable operation situation improving grid equipment, the reference data of turnaround plan formulation can be carried out as scheduling maintainer, make turnaround plan have more directivity and specific aim, improve processing speed and the accuracy of information, decrease manual operation cost, avoid human error and error to a great extent.

The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.

Claims (5)

1., based on PSD-BPA batch processing transformer fault cumulative effect appraisal procedure, it is characterized in that: comprise the following steps,

Step one, failure definition is concentrated containing n+1 failure message, and wherein, n is historical failure information, and (n+1)th is current failure information;

Step 2, definition i=1;

Step 3, judges whether i equals n+1; If not, then go to step five, if so, then go to step four;

Step 4, resolves i-th failure message by the Fault analytical module in PSD-BPA, judges whether to extract fault current information, namely whether there is corresponding fault recorder data; If can not, then go to step five; If can, then the three-phase fault current instantaneous value I in fault recorder data is extracted according to failure message _fAi, I _fBi, I _fCi, and go to step seven;

Step 5, resolves i-th failure message by the Fault analytical module in PSD-BPA, from i-th failure message, extract fault data, and described fault data comprises fault type, time of failure and fault clearance time;

From i-th failure message, obtain i-th fault the moment occurs, the control documents generated after system operation mode file, transient stability Parameter File and fault occur, goes to step six;

Step 6, calls PSD-BPA transient stability simulated program by emulation module, obtains between i-th fault emergence period, flows through the three-phase fault current instantaneous value I of transformer equipment _fAi, I _fBi, I _fCi, go to step seven;

Step 7, by cumulative effect assessment models, calculates out of order cumulative effect value, goes to step eight;

Cumulative effect assessment models is,

$T_{\mathrm{fi}}=\max \begin{array}{}\left\{\begin{array}{c}{T}_{\mathrm{fA}0}+{\∫}_{t_0}^t{\mathrm{\ΔI}}_{\mathrm{fAi}}^2\left(t\right)\mathrm{dt}\\ T_{\mathrm{fB}0}+{\∫}_{t_0}^t{\mathrm{\ΔI}}_{\mathrm{fBi}}^2\left(t\right)\mathrm{dt}\\ T_{\mathrm{fC}0}+{\∫}_{t_0}^t{\mathrm{\ΔI}}_{\mathrm{fCi}}^2\left(t\right)\mathrm{dt}\end{array}\right.\end{array}$

Wherein, T _fA0, T _fB0, T _fC0for the initialization cumulative effect value of each phase of transformer, Δ I _fAi, Δ I _fBi, Δ I _fCifor flowing through the passing through property failed shorted current differential of each phase of transformer, Δ I _fAi=I _fAi-I _fA0, Δ I _fBi=I _fBi-I _fB0, Δ I _fCi=I _fCi-I _fC0, I _fA0, I _fB0, I _fC0for the steady-state current value of each phase, T _fifor transformer stands the cumulative effect value of i-th fault, t ₀for the initial time of short-circuit current, t is the end time of short-circuit current;

Step 8, judges whether i is less than n+1, and if so, then i=i+1, goes to step three; If not, then go to step nine;

Step 9, stands out of order cumulative effect value by transformer and adds up, and obtains new cumulative effect value, and result is write on destination file and export;

Totalization formula is,

T _f＝K _f·ΣT _fi(i＝1,2,...,n+1)

Wherein, K _ffor experiential modification coefficient.

2. according to claim 1 based on PSD-BPA batch processing transformer fault cumulative effect appraisal procedure, it is characterized in that: described failure message is the recorder data provided by protection wave recording device, through the data file that primary dcreening operation is formed.

3. according to claim 1 based on PSD-BPA batch processing transformer fault cumulative effect appraisal procedure, it is characterized in that: calculate to flow through between the fault emergence period transformer equipment the process of three-phase fault current instantaneous value be,

A1) start flow calculation program, load operating mode file, calculate the flow situations that the moment occurs fault, obtain power flow solutions file;

A2) resolve control documents, fail-safe control measure is transformed fault card and failure vanishes card, merges with transient stability Parameter File and write as interim calculation document;

A3) start steady calculation procedure temporarily, load power flow solutions file and interim calculation document, computer sim-ulation result, and Output simulation destination file;

A4) resolve fault message file, about the configuration information of fault in amendment short-circuit current calculation program control documents, load operating mode file and transient stability Parameter File, calculate calculation of short-circuit current result, and output short circuit current result of calculation file;

A5) resolve simulation result file and calculation of short-circuit current destination file, obtain to flow through between the fault emergence period transformer equipment three-phase fault current instantaneous value.

4. according to claim 3 based on PSD-BPA batch processing transformer fault cumulative effect appraisal procedure, it is characterized in that: flow through between the fault emergence period transformer equipment three-phase fault current instantaneous value can stored in interim findings file, after obtaining new cumulative effect value, this interim findings file erase.

5. according to claim 1 based on PSD-BPA batch processing transformer fault cumulative effect appraisal procedure, it is characterized in that: described based on PSD-BPA batch processing transformer fault cumulative effect appraisal procedure employing fault trigger mechanism, real-time listening is carried out to fault set, when there being new failure message Write fault collection, Trigger update cumulative effect value.