CN104978482B - 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 accumulative effect appraisal procedures

Technical field

The present invention relates to a kind of be based on PSD-BPA batch processing transformer fault accumulative effect appraisal procedures, belong to electric power certainly Dynamicization technical field.

Background technology

When electrical network is short-circuited failure, the passing through property short circuit current flow through on grid equipment can produce certain to equipment Affect, long-term multiple accumulative effect affects bigger to equipment.But lack effectively fixed for the accumulative effect of short circuit current Amount appraisal procedure, in addition, current research is concentrated mainly on impact analysis of the short circuit current to direct faulty equipment, little system Property ground consider that passing through property short circuit current affects on the accumulative effect of the whole network other related equipment.

The assessment of power system transformer failure accumulative effect is referred to, when electrical network is repeatedly short-circuited for a long time failure, transformation The passing through property short circuit current flow through on device equipment produces the accumulative effect for affecting assessment on equipment.The method that it is calculated It is, when electrical network historical failure data cannot be obtained directly from failure wave-recording file, based on electrical network historical failure data, to rely on real The electric parameter and the method for operation of border electrical network, sets up the batch processing phantom of short circuit current, calculates and event occurs in electrical network After barrier, the failed shorted electric current of transformer equipment, quantitative evaluation short-circuit current accumulative effect are flow through.

For the calculating and emulation of electric network fault short circuit current, there is the software of many maturations both at home and abroad.China Power science The electromechanical transient software kit PSD-BPA of institute's exploitation, the software kit has Load flow calculation, transient stability simulation calculation, short circuit current The functions such as calculating, small interference stability calculating, power scheduling travelling mechanism, the planning of power system, design, test in China etc. Have a wide range of applications in relevant unit and each colleges and universities.Accumulative effect is emulated and is calculated to electric network fault using the software, Need first to carry out Load flow calculation according to the method for operation of system, and be manually to stablize file to specify the power flow files being based on, it is defeated The stabilization result file haveing need transformer equipment needed for manual extraction the failure period current value and manually calculated, need Using several softwares and certain personal error may be caused simultaneously, reduce efficiency.

The content of the invention

In order to solve above-mentioned technical problem, the invention provides a kind of accumulated based on PSD-BPA batch processings transformer fault Effective matrix method.

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

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

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

Step 2, defines i=1；

Step 3, judges whether i is equal to n+1；If it is not, then step 5 is gone to, if it is, going to step 4；

Step 4, by the Fault analytical module in PSD-BPA i-th fault message is parsed, and judges whether to extract Fault current information, i.e., with the presence or absence of corresponding fault recorder data；If it is not, going to step 5；If it can, then basis Fault message extracts the three-phase fault current instantaneous value I in fault recorder data_fAi、I_fBi、I_fCi, and go to step 7；

Step 5, parses i-th fault message, from i-th fault message by the Fault analytical module in PSD-BPA Fault data is extracted, the fault data includes fault type, time of failure and fault clearance time；

I-th failure is obtained from i-th fault message moment, system operation mode file, transient stability parameter occur The control file that file and failure are generated after occurring, goes to step 6；

Step 6, by emulation module PSD-BPA transient stability simulated programs are called, during obtaining i-th failure generation, Flow through the three-phase fault current instantaneous value I of transformer equipment_fAi、I_fBi、I_fCi, go to step 7；

Step 7, by accumulative effect assessment models, calculates out of order accumulative effect value, goes to step 8；

Accumulative effect assessment models are,

Wherein, T_fA0、T_fB0、T_fC0For the initialization accumulative effect value of each phase of transformator, Δ I_fAi、ΔI_fBi、ΔI_fCiFor stream Cross the passing through property failed shorted current differential of each phase of transformator, Δ I_fAi=I_fAi-I_fA0,ΔI_fBi=I_fBi-I_fB0,ΔI_fCi= I_fCi-I_fC0, I_fA0、I_fB0、I_fC0For the steady-state current value of each phase, T_fiFor the accumulative effect value that transformator undergoes i-th failure, t₀ For the initial time of short circuit current, t is the end time of short circuit current；

Whether step 8, judge i less than n+1, if it is, i=i+1, goes to step 3；If it is not, then going to step Rapid nine；

Step 9, undergoes transformator the faulty accumulative effect value of institute and adds up, obtains new accumulative effect value, and will knot Fruit is write and exported on destination file；

Totalization formula is,

T_f=K_f·∑T_fi(i=1,2 ..., n+1)

Wherein, K_fFor experiential modification coefficient.

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

Calculating the process of three-phase fault current instantaneous value for flowing through transformer equipment during failure occurs is,

A1 flow calculation program) is started, load operating mode file calculates the flow situations that failure occurs the moment, obtains Power flow solutions file；

A2) parsing control file, by Fault Control measure failure card and failure vanishes card are converted, with transient stability parameter text Part merges is write as interim calculation document；

A3) the temporary steady calculation procedure of startup, loading power flow solutions file and interim calculation document, computer sim- ulation result, and it is defeated Go out simulation result file；

A4) fault message file is parsed, is changed with regard to the configuration information of failure in short-circuit current calculation program control file, Load operating mode file and transient stability Parameter File, calculate calculation of short-circuit current result, and output short circuit current calculates knot Fruit file；

A5) simulation result file and calculation of short-circuit current destination file are parsed, obtains during failure occurs and flow through transformator The three-phase fault current instantaneous value of equipment.

Failure flows through the three-phase fault current instantaneous value of transformer equipment and can be stored in interim findings file during occurring, when obtaining After obtaining accumulative effect value newly, the interim findings file is deleted.

It is described that failure trigger mechanism is adopted based on PSD-BPA batch processing transformer fault accumulative effects appraisal procedure, pair event Barrier collection is monitored in real time, and when there is new fault message Write fault collection, triggering updates cumulative accumulative effect value.

The beneficial effect that the present invention is reached：1st, the present invention proposes the concept of failure accumulative effect, sends out in power system After raw short trouble, accumulative effect of the failure to equipment can be calculated according to the fault message for obtaining, be improve for failure The utilization ratio of data；2nd, calculated accumulative effect value of the invention, can carry out repair schedule as scheduling maintainer The reference data of formulation so that repair schedule is more directional and specific aim；3rd, the present invention is improve by forming batch processing The processing speed and accuracy of information, reduces artificial running cost, largely avoids human error and error.

Description of the drawings

Fig. 1 is the flow chart of the present invention.

Fig. 2 is Graphical output.

Specific embodiment

Below in conjunction with the accompanying drawings the invention will be further described.Following examples are only used for clearly illustrating the present invention Technical scheme, and can not be limited the scope of the invention with this.

As shown in figure 1, being based on PSD-BPA batch processing transformer fault accumulative effect appraisal procedures, comprise the following steps：

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

Step 2, defines i=1.

Step 3, judges whether i is equal to n+1；If it is not, then step 5 is gone to, if it is, going to step 4.

Step 4, by the Fault analytical module in PSD-BPA i-th fault message is parsed, and judges whether to extract Fault current information, i.e., with the presence or absence of corresponding fault recorder data；If it is not, going to step 5；If it can, then basis Fault message extracts the three-phase fault current instantaneous value I in fault recorder data_fAi、I_fBi、I_fCi, three-phase fault electric current is instantaneous Value is stored in interim findings file, and goes to step 7.

Above-mentioned fault message is the recorder data provided by protection wave recording device, through primary dcreening operation formed data file, one As be Excel form documents.

Step 5, parses i-th fault message, from i-th fault message by the Fault analytical module in PSD-BPA Fault data is extracted, fault data includes fault type, time of failure and fault clearance time；From i-th failure I-th failure is obtained in information moment, system operation mode file (PSD-BPA forms, * .dat), transient stability parameter occur The control file (* .ctr) that file (PSD-BPA forms, * .swi) and failure are generated after occurring, goes to step 6.

Step 6, by emulation module PSD-BPA transient stability simulated programs are called, during obtaining i-th failure generation, Flow through the three-phase fault current instantaneous value I of transformer equipment_fAi、I_fBi、I_fCi, three-phase fault current instantaneous value is stored in interim findings File, goes to step 7.

Detailed process is as follows：

A1 flow calculation program) is started, load operating mode file calculates the flow situations that failure occurs the moment, obtains Power flow solutions file；

A2) parsing control file, by Fault Control measure failure card and failure vanishes card are converted, with transient stability parameter text Part merges is write as interim calculation document；

PSD-BPA expresses different elements by defining different cards, realizes different functions, does not have in PSD-BPA With regard to the corresponding card such as reclosing and unsuccessful reclosing, these functions are realized, need the method by timing simulation, for example Realize that single-phase permanent earth short circuit jumps single-phase, this failure of three-phase is jumped after reclosing is unsuccessful it is necessary to respectively using single-phase Failure card, single-phase fault disappearance card and three-phase fault card are simulated sequentially in time；

A3) the temporary steady calculation procedure of startup, loading power flow solutions file and interim calculation document, computer sim- ulation result, and it is defeated Go out simulation result file；

A4) fault message file is parsed, is changed with regard to the configuration information of failure in short-circuit current calculation program control file, Load operating mode file and transient stability Parameter File, calculate calculation of short-circuit current result, and output short circuit current calculates knot Fruit file；

A5) simulation result file and calculation of short-circuit current destination file are parsed, obtains during failure occurs and flow through transformator The three-phase fault current instantaneous value of equipment, three-phase fault current instantaneous value is stored in interim findings file.

Step 7, by accumulative effect assessment models, calculates out of order accumulative effect value, goes to step 8；

Accumulative effect assessment models are,

Wherein, T_fA0、T_fB0、T_fC0For the initialization accumulative effect value of each phase of transformator, Δ I_fAi、ΔI_fBi、ΔI_fCiFor stream Cross the passing through property failed shorted current differential of each phase of transformator, Δ I_fAi=I_fAi-I_fA0,ΔI_fBi=I_fBi-I_fB0,ΔI_fCi= I_fCi-I_fC0, I_fA0、I_fB0、I_fC0For the steady-state current value of each phase, T_fiFor the accumulative effect value that transformator undergoes i-th failure, t₀ For the initial time of short circuit current, t is the end time of short circuit current.

Whether step 8, judge i less than n+1, if it is, i=i+1, goes to step 3；If it is not, then going to step Rapid nine.

Step 9, undergoes transformator the faulty accumulative effect value of institute and adds up, obtains new accumulative effect value, and will knot Fruit is write and exported on destination file, deletes interim findings file, and output here is as shown in Fig. 2 graphically export.

Totalization formula is,

T_f=K_f·∑T_fi(i=1,2 ..., n+1)

Wherein, K_fFor experiential modification coefficient.

It is above-mentioned that failure trigger mechanism is adopted based on PSD-BPA batch processing transformer fault accumulative effects appraisal procedure, pair event Barrier collection is monitored in real time, and when there is new fault message Write fault collection, triggering updates cumulative accumulative effect value.

It is above-mentioned based on PSD-BPA batch processing transformer fault accumulative effect appraisal procedures, it is proposed that failure accumulative effect Concept, after power system is short-circuited failure, can calculate accumulation of the failure to equipment and imitates according to the fault message for obtaining Should, finally graphically show, improve the utilization ratio for fault data；Calculated accumulative effect value, can root Sort according to the historical failure current accumulation effect of transformator, there is provided the early warning of transformator situation and overhaul of the equipments preference strategy, have Help improve the stable operation situation of grid equipment, the reference number of repair schedule formulation can be carried out as scheduling maintainer According to so that repair schedule is more directional and specific aim, the processing speed and accuracy of information are improve, reduce artificial behaviour Make cost, largely avoid human error and error.

The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, on the premise of without departing from the technology of the present invention principle, some improvement and deformation can also be made, these improve and deform Also should be regarded as protection scope of the present invention.

Claims (5)

1. PSD-BPA batch processing transformer fault accumulative effect appraisal procedures are based on, it is characterised in that：Comprise the following steps,

Step one, failure definition is concentrated and contains n+1 fault message, wherein front n is historical failure information, (n+1)th is to work as Prior fault information；

Step 2, defines i=1；

Step 3, judges whether i is equal to n+1；If it is not, then step 5 is gone to, if it is, going to step 4；

Step 4, by the Fault analytical module in PSD-BPA i-th fault message is parsed, and is judged whether to extract and is out of order Current information, i.e., with the presence or absence of corresponding fault recorder data；If it is not, going to step 5；If it can, then according to failure Information retrieval is out of order the three-phase fault current instantaneous value I in recorder data_fAi、I_fBi、I_fCi, and go to step 7；

Step 5, by the Fault analytical module in PSD-BPA i-th fault message is parsed, and is extracted from i-th fault message Be out of order data, and the fault data includes fault type, time of failure and fault clearance time；

I-th failure is obtained from i-th fault message moment, system operation mode file, transient stability Parameter File occur And the control file generated after failure generation, go to step 6；

Step 6, by emulation module PSD-BPA transient stability simulated programs are called, and during obtaining i-th failure generation, are flowed through The three-phase fault current instantaneous value I of transformer equipment_fAi、I_fBi、I_fCi, go to step 7；

Step 7, by accumulative effect assessment models, calculates out of order accumulative effect value, goes to step 8；Accumulative effect is commented Estimating model is,

$T_{fi}=max\left\{\begin{array}{c}{T}_{fA0}+{\∫}_{t_0}^t{\mathrm{\ΔI}}_{fAi}^2\left(t\right)dt\\ T_{fB0}+{\∫}_{t_0}^t{\mathrm{\ΔI}}_{fBi}^2\left(t\right)dt\\ T_{fC0}+{\∫}_{t_0}^t{\mathrm{\ΔI}}_{fCi}^2\left(t\right)dt\end{array}\right.$

Wherein, T_fA0、T_fB0、T_fC0For the initialization accumulative effect value of each phase of transformator, Δ I_fAi、ΔI_fBi、ΔI_fCiTo flow through change The passing through property failed shorted current differential of each phase of depressor, Δ I_fAi=I_fAi-I_fA0,ΔI_fBi=I_fBi-I_fB0,ΔI_fCi=I_fCi- I_fC0, I_fA0、I_fB0、I_fC0For the steady-state current value of each phase, T_fiFor the accumulative effect value that transformator undergoes i-th failure, t₀For short The initial time of road electric current, t is the end time of short circuit current；

Whether step 8, judge i less than n+1, if it is, i=i+1, goes to step 3；If it is not, then going to step 9；

Step 9, undergoes transformator the faulty accumulative effect value of institute and adds up, obtains new accumulative effect value, and result is write Export on destination file；

Totalization formula is,

T_f=K_f·∑T_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 accumulative effect appraisal procedures, its feature exists In：The fault 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 accumulative effect appraisal procedures, its feature exists In：Calculating the process of three-phase fault current instantaneous value for flowing through transformer equipment during failure occurs is,

A1 flow calculation program) is started, load operating mode file calculates the flow situations that failure occurs the moment, obtains trend Destination file；

A2) parsing control file, by Fault Control measure failure card and failure vanishes card are converted, and are closed with transient stability Parameter File And write as interim calculation document；

A3) start temporarily steady calculation procedure, loading power flow solutions file and interim calculation document, computer sim- ulation result, and export imitative True destination file；

A4) fault message file is parsed, is changed in short-circuit current calculation program control file with regard to the configuration information of failure, loading Method of operation file and transient stability Parameter File, calculate calculation of short-circuit current result, and output short circuit current result of calculation text Part；

A5) simulation result file and calculation of short-circuit current destination file are parsed, obtains during failure occurs and flow through transformer equipment Three-phase fault current instantaneous value.

4. according to claim 3 based on PSD-BPA batch processing transformer fault accumulative effect appraisal procedures, its feature exists In：Failure flows through the three-phase fault current instantaneous value of transformer equipment and can be stored in interim findings file during occurring, new when obtaining Accumulative effect value after, the interim findings file is deleted.

5. according to claim 1 based on PSD-BPA batch processing transformer fault accumulative effect appraisal procedures, its feature exists In：It is described that failure trigger mechanism is adopted based on PSD-BPA batch processing transformer fault accumulative effects appraisal procedure, fault set is entered Row is monitored in real time, and when there is new fault message Write fault collection, triggering updates cumulative accumulative effect value.