CN103810340A - Fault vector analysis and fault diagnosis method based on mapping of instation main wiring diagram - Google Patents
Fault vector analysis and fault diagnosis method based on mapping of instation main wiring diagram Download PDFInfo
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Abstract
The invention discloses a fault vector analysis and fault diagnosis method based on mapping of an instation main wiring diagram. Modeling is carried out according to an IEC61970, and therefore characteristic quantity information can be extracted in a unified mode for setting up all instation CTs, wherein the characteristic quantity information includes model information such as corresponding installation positions and transformation ratios; meanwhile, the CTs correspond to instation fault recorder channels, specific physical quantities such as flow directions and magnitudes of currents corresponding to instation equipment are mapped to a visual current vector diagram interface based on nodes and branch circuits through an intermediate quantity, namely, CT modeling, a fault current flow direction diagram based on various sequence networks can be obtained through a filtering algorithm, accordingly a series of analyses of quick locking of the current flow directions, fault location and fault nature judgment after faults can be achieved and a visual and effective analysis platform is provided.
Description
Technical field
The present invention relates to a kind of electric network fault vector analysis and fault diagnosis field, relate in particular to a kind of fault vector analysis and method for diagnosing faults based on main wiring diagram mapping in station.
Background technology
Along with electrical network scale constantly expands, grid contact is constantly strengthened, electrical network breaks down and local fault causes the probability that involves expanded range constantly to increase, for realizing the Fast Identification of fault and accurately locating, its coverage rate of fault oscillograph networked system constantly promotes, when electric network fault, dependent failure record ripple information can be uploaded to dispatching center in time.
But, the fault data at each interval cannot unifiedly on figure in station intuitively be shown, existing power failure vector analysis and fault diagnosis module, the fault current vector that yardman is difficult to by calculating fault moment relevant range is carried out the accurate identification of fault and locates fast.
Summary of the invention
The deficiency existing for solving prior art; the invention discloses fault vector analysis and method for diagnosing faults based on main wiring diagram mapping in station; the method can realize the automatic calculating of the fault current vector of related interval, for locating fast and protect action behavior accurate evaluation that effective instrument is provided in trouble spot.
For achieving the above object, concrete scheme of the present invention is as follows:
Based on fault vector analysis and the method for diagnosing faults of main wiring diagram mapping in station, comprise the following steps:
Step 1: based on coBase platform CT modeling, build the model information of all CT current transformers in station;
Step 2: fault vector analysis and the fault diagnosis platform of setting up figure mapping in the real-time station based on CT modeling, transformer substation foundation data platform and failure wave-recording networked system are carried out to data fusion by data-interface, data distribute in the relevant database of whole network, use directory service based on these databases of the tree-shaped structural reference of level, real-time integrated data offer functional fault vector analysis and fault diagnosis platform from multiple source;
Step 3: the vector analysis of fault amount, based on Kirchhoff's current law (KCL), the each fault amount vector based on the element that confluxes, primary current polar plot based on negative sequence fault current and a polar plot of zero-sequence fault electric current are analyzed;
Step 4: take fault current vector as search engine, determine faulty equipment.
The modeling process of described step 1: based on the scalable polar plot of relay protection fundamental information platform and Common Information Model; the unified characteristic quantity information that extracts; be used for building all CT current transformer models in station, simultaneously that this CT current transformer model is corresponding with station internal fault oscillograph networked system passage.
In described step 1, complete physical quantity corresponding station equipment is mapped as to the current phasor figure interface based on node and branch road intuitively by CT modeling, realize the fault current polar plot based on each order net by Fu Shi filtering algorithm.
In described step 1, physical quantity comprises current direction and size thereof.
In described step 1, model information comprises the corresponding installation site of CT current transformer and no-load voltage ratio.
The process of making of described fault current polar plot: take each sequence voltage as benchmark, real time fail current value can directly obtain the fault current increment of current change quantity and the asymmetric amount of each order of effective faults character by Fu Shi filtering algorithm, be amplitude size and the phase place of negative phase-sequence and zero-sequence current amount, make the fault current polar plot based on each order net according to these information.
In described step 2, the integrated logic XML using by network service of data encodes according to standard modeling, and wherein, Web Service Definition Language WSDL provides the semantic of specific service and how to use it for defining; The single object access protocal SOAP that answers in HTTP/S pattern has been used for network service requirement, and universal description, finds and integrated UDDI agreement is for finding Web service.
The principle of analyzing in described step 3 is: in the fault current polar plot generating, search for fault current maximum the branch with other branch current opposite directions.
In described step 4, fault amount comprises Sudden Changing Rate and negative, zero-sequence current amount.
When described definite faulty equipment: while having zero-sequence fault electric current, zero-sequence current amplitude maximum and with the faulty line that branches into of other branch current opposite directions; While having negative sequence fault current, negative-sequence current amplitude maximum and with the faulty line that branches into of other branch current opposite directions; While only having Sudden Changing Rate electric current, Sudden Changing Rate amplitude electric current maximum and with the faulty line that branches into of other branch current opposite directions.
Technique of Information Integration, can expand security regulations as the public key management system (XKMS) of XML and XML signature, and compression/decompression technology can be used for improving the rate of information throughput.This diagnostic platform adopts modularization and extendible design to be convenient to increasing of the new rear new transformer station's modeling of website access and corresponding CT, also can, along with its model is upgraded in the increase of gauge point increase or switch and CT in network, can on basis, make multiple senior application at existing each order current phasor figure simultaneously.The most direct function is these senior application such as the localization of fault take each order magnitude of current as search engine, the Judgement of failure that each sequence network directly provides.Increasing progressively of this system can be: the increase of region area, therefore transformer station's access quantity and record substation, function and equipment increase.
As shown in Figure 1; based on the scalable polar plot of relay protection fundamental information platform (coBase) (svg)) and Common Information Model (cim); be the whole network of setting up of global information modeling based on IEC61970 once, the database of second protection equipment; comprise primary equipment truth and second protection configuring condition, and carry out real-time update according to physical device situation in net.This system is carried out modeling according to IEC61970, can unify to extract characteristic quantity information, be used for building all CT current transformers in station, comprise the model informations such as corresponding installation site and no-load voltage ratio, simultaneously that therefore this CT is corresponding with record passage in station, wait these concrete physical quantitys by this intermediate quantity of CT modeling current direction size corresponding station equipment so just complete, be mapped as the current phasor figure interface based on node and branch road intuitively, can realize the fault current flow graph based on each order net by filtering algorithm, can realize accordingly after fault about current direction quick lock in localization of fault, and nature of trouble is judged a series of analyses, effectively analysis platform directly perceived is provided.
Based on the vector analysis of the each fault amount of the element that confluxes: supposition is at the symmetrical three-phase shortcircuit of circuit F point generation, protected system is by a power network structure, but in the time solving fault component, is just converted into the radial network take trouble spot additional supply as single supply.But this single supply changes with trouble spot again, always it is at trouble spot place.Because generally there is Z
f" X
l, wherein Z
ffor load equivalent impedance, X
lfor line reactance, therefore can not consider to flow overladen fault current component.At this moment network just can be considered the network that is flowed to (main system power supply and all small power supply) of each power supply by trouble spot additional supply, and each electric power branch electric current gets with bus and point to protected circuit for just, is had by Kirchhoff's current law (KCL):
In formula
---when fault, flow to power branch j, the fault current of i;
Z
Σ j---the equiva lent impedance of being looked to branch road j by trouble spot.
Known impedance angular region is 70 °～85 °, and getting trouble spot institute making alive is 0 ° of benchmark, and fault current phase angle is
therefore
fault branch angle of impedance is
the phase angle that defines reverse fault current is
here
approximate being taken as between 80 ° of each magnitudes of current meets vector synthesis.
Each branch current is expressed from the next:
for each point of branch current braning factor, be also that each point of branch current size determined by its braning factor, K
gfz>=1, the therefore electric current maximum of place, trouble spot branch.As theoretical foundation, the protection discriminating direction criterion of analysis of failure additivity based on positive sequence fault current.Fault increment is trouble spot search engine localization of faults position fast thus, the faulty equipment of judgement locking simultaneously.
According to above principle, in the fault current polar plot generating, search for fault current maximum the branch with other branch current opposite directions.
Primary current polar plot based on negative sequence fault current: similarly can find the fault direction search characteristics amount more responsive to malfunction.Suppose generalized case, be connected to n bar branch (comprising inlet wire and outlet) on bus, electric current positive dirction is that bus flows to circuit.As shown in Figure 6, there is unbalanced fault in k1 point on outlet i.Because negative-sequence current is present in various unbalanced faults, and each branch road negative-sequence current is as follows:
Now had by Kirchhoff's current law (KCL):
In formula
---when unbalanced fault, flow to branch road j, the negative-sequence current of i;
Known negative sequence impedance angular region is 70 °～85 °, therefore branch road j negative-sequence current phase angle is
branch road i negative-sequence current phase angle is
between each negative-sequence current amount, meet vector synthesis, therefore the negative-sequence current of place, trouble spot branch maximum and with other branch current opposite directions.
A polar plot of zero-sequence fault electric current is except outside the Pass its fault direction searching route and earth point have, and its character is similar to negative phase-sequence, repeats no more.
Take fault amount as search engine, determine fast faulty equipment.While having zero-sequence fault electric current, zero-sequence current amplitude maximum and with the faulty line that branches into of other branch current opposite directions; While having negative sequence fault current, negative-sequence current amplitude maximum and with the faulty line that branches into of other branch current opposite directions; While only having Sudden Changing Rate electric current, Sudden Changing Rate amplitude electric current maximum and with the faulty line that branches into of other branch current opposite directions.Determining of fault component direction based on locality amount (electric current, voltage) due to what adopt, then determine through coBase platform the fault order amount direction that flows through primary system, therefore this direction of search qualitatively, in addition by the determined fault search direction of fusion of information in primary system, having overcome the synchronous problem of wide area, is the senior application of the Network Based and information fusion of succinct practical failure system.
Beneficial effect of the present invention:
Realize the modeling of the each fault order net figure based on station equipment and topological relation decision thereof, realize the automatic calculating of the fault current vector of related interval, for locating fast and protect action behavior accurate evaluation that effective instrument is provided in trouble spot.Realized under failure scenario, take station equipment as background, the assay surface take the fault current flow direction as appearance form, can realize the judgement of fault element fast, and the fault particularly with the multicomponent connection element of the effect of confluxing judges directly perceived, effective.
Accompanying drawing explanation
The coBase platform of Fig. 1 based on IEC61970;
The CT Modeling Platform of Fig. 2 based on coBase;
The real-time polar plot of Fig. 3 positive sequence;
The real-time polar plot of Fig. 4 negative phase-sequence;
The real-time polar plot of Fig. 5 zero sequence;
Fig. 6 bus is connected to the transformer station of n bar branch;
Fig. 7 transforming plant primary wiring diagram.
Embodiment:
Below in conjunction with accompanying drawing, the present invention is described in detail:
Based on fault vector analysis and the method for diagnosing faults of main wiring diagram mapping in station, comprise the following steps:
Step 1: based on coBase platform CT modeling, build the model information of all CT current transformers in station;
Step 2: fault vector analysis and the fault diagnosis platform of setting up figure mapping in the real-time station based on CT modeling, transformer substation foundation data platform and failure wave-recording networked system are carried out to data fusion by data-interface, data distribute in the relevant database of whole network, use directory service based on these databases of the tree-shaped structural reference of level, real-time integrated data offer functional fault vector analysis and fault diagnosis platform from multiple source;
Step 3: the vector analysis of fault amount, based on Kirchhoff's current law (KCL), the each fault amount vector based on the element that confluxes, primary current polar plot based on negative sequence fault current and a polar plot of zero-sequence fault electric current are analyzed;
Step 4: take fault current vector as search engine, determine faulty equipment.
The modeling process of described step 1: based on the scalable polar plot of relay protection fundamental information platform and Common Information Model; the unified characteristic quantity information that extracts; be used for building all CT current transformer models in station, simultaneously that this CT current transformer model is corresponding with station internal fault oscillograph networked system passage.
In described step 1, complete physical quantity corresponding station equipment is mapped as to the current phasor figure interface based on node and branch road intuitively by CT modeling, realize the fault current polar plot based on each order net by Fu Shi filtering algorithm.
In described step 1, physical quantity comprises current direction and size thereof.
In described step 1, model information comprises the corresponding installation site of CT current transformer and no-load voltage ratio.
The process of making of described fault current polar plot: take each sequence voltage as benchmark, real time fail current value can directly obtain the fault current increment of current change quantity and the asymmetric amount of each order of effective faults character by Fu Shi filtering algorithm, be amplitude size and the phase place of negative phase-sequence and zero-sequence current amount, make the fault current polar plot based on each order net according to these information.
As shown in Figure 2, in described step 2, the integrated logic XML using by network service of data encodes according to standard modeling, and wherein, Web Service Definition Language WSDL provides the semantic of specific service and how to use it for defining; The single object access protocal SOAP that answers in HTTP/S pattern has been used for network service requirement, and universal description, finds and integrated UDDI agreement is for finding Web service.
The principle of analyzing in described step 3 is: in the fault current polar plot generating, search for fault current maximum the branch with other branch current opposite directions.
In described step 4, fault amount comprises Sudden Changing Rate and negative, zero-sequence current amount.
When described definite faulty equipment, while having zero-sequence fault electric current, zero-sequence current amplitude maximum and with the faulty line that branches into of other branch current opposite directions; While having negative sequence fault current, negative-sequence current amplitude maximum and with the faulty line that branches into of other branch current opposite directions; While only having Sudden Changing Rate electric current, Sudden Changing Rate amplitude electric current maximum and with the faulty line that branches into of other branch current opposite directions.
Transforming plant primary wiring diagram, as shown in Figure 7, when certain 220kV transformer station breaks down, 220kV III line both sides C phase switch trip, the 220kV I line, 220kV II line, #1 main transformer, bus connection switch that after 85ms, this station and 220kV III line run on same bus uniformly-spaced all three-phase tripping operation do not overlap.
1, adopt above-mentioned CT modeling.
2, the interior figure mapping method in station carries out the computational analysis of fault amount in real time, and fault vector order component value is in table 1,2, and as shown in Figure 3, as shown in Figure 4, the real-time polar plot of zero sequence as shown in Figure 5 for the real-time polar plot of negative phase-sequence for the real-time polar plot of positive sequence.
After table 1 fault, the list of II bus order component
After table 2 fault, 220kV III circuit, the list of order component
3, in slave station, each interval fault vector exploded view can very intuitively be found out when fault; each interval fault positive sequence amount all flows to 220kV III circuit; fault zero, negative sequence component flow to each branch by 220kV III circuit through bus; therefore can determine that this electric network fault is 220kV III line circuit C phase earth fault; trouble spot is in 220kV III line circuit C phase, and bus protection action behavior causes 220kV I line, 220kV II line, #1 main transformer, the tripping operation of bus connection switch three-phase not to overlap extremely.
Claims (10)
1. fault vector analysis and the method for diagnosing faults based on main wiring diagram mapping in station, is characterized in that, comprises the following steps:
Step 1: based on coBase platform CT modeling, build the model information of all CT current transformers in station;
Step 2: fault vector analysis and the fault diagnosis platform of setting up figure mapping in the real-time station based on CT modeling, transformer substation foundation data platform and failure wave-recording networked system are carried out to data fusion by data-interface, data distribute in the relevant database of whole network, use directory service based on these databases of the tree-shaped structural reference of level, real-time integrated data offer functional fault vector analysis and fault diagnosis platform from multiple source;
Step 3: the vector analysis of fault amount, based on Kirchhoff's current law (KCL), the each fault amount vector based on the element that confluxes, primary current polar plot based on negative sequence fault current and a polar plot of zero-sequence fault electric current are analyzed;
Step 4: take fault current vector as search engine, determine faulty equipment.
2. fault vector analysis and the method for diagnosing faults based on main wiring diagram mapping in station as claimed in claim 1; it is characterized in that; the modeling process of described step 1: based on the scalable polar plot of relay protection fundamental information platform and Common Information Model; the unified characteristic quantity information that extracts; be used for building all CT current transformer models in station, simultaneously that this CT current transformer model is corresponding with station internal fault oscillograph networked system passage.
3. fault vector analysis and the method for diagnosing faults based on main wiring diagram mapping in station as claimed in claim 1, it is characterized in that, in described step 1, complete physical quantity corresponding station equipment is mapped as to the current phasor figure interface based on node and branch road intuitively by CT modeling, realize the fault current polar plot based on each order net by Fu Shi filtering algorithm.
4. fault vector analysis and the method for diagnosing faults based on main wiring diagram mapping in station as claimed in claim 3, is characterized in that, in described step 1, physical quantity comprises current direction and size thereof.
5. fault vector analysis and the method for diagnosing faults based on main wiring diagram mapping in station as claimed in claim 3, it is characterized in that, the process of making of described fault current polar plot: take each sequence voltage as benchmark, real time fail current value can directly obtain the fault current increment of current change quantity and the asymmetric amount of each order of effective faults character by Fu Shi filtering algorithm, be amplitude size and the phase place of negative phase-sequence and zero-sequence current amount, make the fault current polar plot based on each order net according to these information.
6. fault vector analysis and the method for diagnosing faults based on main wiring diagram mapping in station as claimed in claim 1, is characterized in that, in described step 1, model information comprises the corresponding installation site of CT current transformer and no-load voltage ratio.
7. fault vector analysis and the method for diagnosing faults based on main wiring diagram mapping in station as claimed in claim 1, it is characterized in that, in described step 2, the integrated logic XML using by network service of data encodes according to standard modeling, wherein, Web Service Definition Language WSDL provides the semantic of specific service and how to use it for defining; The single object access protocal SOAP that answers in HTTP/S pattern has been used for network service requirement, and universal description, finds and integrated UDDI agreement is for finding Web service.
8. fault vector analysis and the method for diagnosing faults based on main wiring diagram mapping in station as claimed in claim 1, it is characterized in that, the principle of analyzing in described step 3 is: in the fault current polar plot generating, search for fault current maximum the branch with other branch current opposite directions.
9. fault vector analysis and the method for diagnosing faults based on main wiring diagram mapping in station as claimed in claim 1, is characterized in that, in described step 4, fault amount comprises Sudden Changing Rate and negative, zero-sequence current amount.
10. fault vector analysis and the method for diagnosing faults based on main wiring diagram mapping in station as claimed in claim 1, it is characterized in that, when described definite faulty equipment: while having zero-sequence fault electric current, zero-sequence current amplitude maximum and with the faulty line that branches into of other branch current opposite directions; While having negative sequence fault current, negative-sequence current amplitude maximum and with the faulty line that branches into of other branch current opposite directions; While only having Sudden Changing Rate electric current, Sudden Changing Rate amplitude electric current maximum and with the faulty line that branches into of other branch current opposite directions.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105305391A (en) * | 2015-11-18 | 2016-02-03 | 国网甘肃省电力公司定西供电公司 | Protection action evaluation method |
| CN107947136A (en) * | 2017-12-15 | 2018-04-20 | 贵州电网有限责任公司 | A kind of Distribution Network Failure fast positioning cutting method and system based on fault vector |
| CN108445349A (en) * | 2018-02-07 | 2018-08-24 | 国网山东省电力公司潍坊供电公司 | A kind of current sequence components comparison expression fault section location method of the feeder line containing DG |
| CN109902373A (en) * | 2019-02-21 | 2019-06-18 | 国网山东省电力公司临沂供电公司 | A kind of area under one's jurisdiction Fault Diagnosis for Substation, localization method and system |
| CN112510654A (en) * | 2020-11-20 | 2021-03-16 | 山东山大电力技术股份有限公司 | Bus fault diagnosis method, system, readable medium and equipment |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105305391A (en) * | 2015-11-18 | 2016-02-03 | 国网甘肃省电力公司定西供电公司 | Protection action evaluation method |
| CN105305391B (en) * | 2015-11-18 | 2018-06-15 | 国网甘肃省电力公司定西供电公司 | A kind of protection act evaluation method |
| CN107947136A (en) * | 2017-12-15 | 2018-04-20 | 贵州电网有限责任公司 | A kind of Distribution Network Failure fast positioning cutting method and system based on fault vector |
| CN108445349A (en) * | 2018-02-07 | 2018-08-24 | 国网山东省电力公司潍坊供电公司 | A kind of current sequence components comparison expression fault section location method of the feeder line containing DG |
| CN108445349B (en) * | 2018-02-07 | 2020-08-11 | 国网山东省电力公司潍坊供电公司 | Current sequence component comparison type fault section positioning method containing DG feeder |
| CN109902373A (en) * | 2019-02-21 | 2019-06-18 | 国网山东省电力公司临沂供电公司 | A kind of area under one's jurisdiction Fault Diagnosis for Substation, localization method and system |
| CN112510654A (en) * | 2020-11-20 | 2021-03-16 | 山东山大电力技术股份有限公司 | Bus fault diagnosis method, system, readable medium and equipment |
| CN112510654B (en) * | 2020-11-20 | 2021-07-09 | 山东山大电力技术股份有限公司 | Bus fault diagnosis method, system, readable medium and equipment |
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Inventor after: Li Lei Inventor after: Wang Qun Inventor after: Zhang Yingbin Inventor after: Li Qiang Inventor after: Li Naiyong Inventor after: Zhang Lizhuo Inventor after: Zhu Qianru Inventor after: Huang Debin Inventor after: Tang Yi Inventor after: Wang Cuan Inventor after: Wang Anning Inventor after: Lin Xia Inventor before: Tang Yi Inventor before: Zhang Yingbin Inventor before: Li Qiang Inventor before: Li Lei Inventor before: Li Naiyong Inventor before: Zhu Qianru Inventor before: Huang Debin Inventor before: Wang Anning Inventor before: Wang Cuan Inventor before: Lin Xia Inventor before: Wang Qun |