CN103326335A - System and method for false action resistance of distance section III based on domain double-type fault characteristic - Google Patents
System and method for false action resistance of distance section III based on domain double-type fault characteristic Download PDFInfo
- Publication number
- CN103326335A CN103326335A CN2013102149618A CN201310214961A CN103326335A CN 103326335 A CN103326335 A CN 103326335A CN 2013102149618 A CN2013102149618 A CN 2013102149618A CN 201310214961 A CN201310214961 A CN 201310214961A CN 103326335 A CN103326335 A CN 103326335A
- Authority
- CN
- China
- Prior art keywords
- station
- protection
- subordinate
- iii
- fault
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a system and method for false action resistance of distance section III based on a domain double-type fault characteristic and belongs to the technical field of power system relay protection. The system comprises a protecting system fault characteristic module and a grid fault characteristic module. An upper-level section III protection condition is opened or locked by the protecting system fault characteristic module through a protecting system fault characteristic; the upper-level section III protection condition is opened or locked by the grid fault characteristic module through a grid fault characteristic, so that the protecting system fault characteristic module is effectively supplemented. Whether the operation is delayed or not is judged according to the motion criteria of the distance III section by the upper-level protecting device when a lower-level system is broken down. Meanwhile, whether the distance section III is opened or not is determined by the protecting system fault characteristic module and the grid fault characteristic module through the protecting system fault characteristic and the grid fault characteristic which are collected in a domain. The good false action resistant effect can be achieved, the false action resistant capacity and the chain tripping resistant capacity of the distance section III are effectively improved, the far-reserve function is improved, and the safe and effective operation of the system in a transitional period is guaranteed.
Description
Technical field
The present invention relates to a kind of III of Distance section faulty action preventing system and method based on the two class fault signatures in zone, belong to the Relay Protection Technology in Power System field.
Background technology
Relaying protection is the first line of defence that ensures electric power netting safe running.In recent years along with electric network composition is day by day complicated, traditional backup protection is owing to only utilizing the local information failure judgement, its defective exposed day by day, and power grid security in serious threat when the defencive function performance is good.But the particularity of relaying protection has determined the improvement of protection and innovation and should progressively carry out.Therefore before realizing that the backup protection principle is thoroughly reformed, need to find a kind of suitable safely and effectively backup protection pattern of transitional period.It is current that measure mainly exists contradiction and emergency function far away between faulty action preventing and the sensitivity still need keep two large major issues about III of Distance section faulty action preventing.The III section self-characteristic that for this reason needs to adjust the distance improves, and makes it find good balance point between sensitivity and reliability, perhaps utilizes other householder method that overload and fault are distinguished and makes the not malfunction of III segment protect.
The improvement of the at present relevant III of Distance section of Chinese scholars faulty action preventing measure has obtained a large amount of useful achievements, mainly is divided into 3 classes:
1) increases the load limit characteristic in the protection operating characteristics
Take directional impedance relay shown in Figure 1 as example, border circular areas 1 is the operating space of impedance relay, and zone 2 is load impedance (comprising normal duty and overload) region.As seen from the figure, there is overlapping region 3 between the original operating space of directional relay and the load impedance, if load was invaded in the zone 3 when circuit moved, will causes the directional relay malfunction.This is increased load limit line 1 and 2, and the protective feature zone new with zone 1 common composition then can effectively prevent from protecting overload mis-operation, and is that high resistive fault and emergency function far away keep motion space as much as possible.
2) local assistant criteria prevents malfunction
The impedance relay of Fig. 1 circle characteristic itself can't be distinguished internal fault and overload well, and can add extra assistant criteria to this and distinguish, for example:
I
2+I
0＞0.5I
1 (1)
I in the formula
1, I
2, I
0Be positive and negative, the zero-sequence current of protection installation place, U
1Be positive sequence voltage,
Be the angle of positive sequence voltage and forward-order current,
Be the line impedance angle.Formula (1), (2) are got or again with the directional impedance relay phase with; then can start in unbalanced fault up-to-date style (1); symmetric fault up-to-date style (2) can start; and overload up-to-date style (1), (2) all do not start, thereby play the effect that prevents the distance protection malfunction.
3) trend shifts identification and prevents malfunction
Trend shifts identification and belongs to one of research direction of wide area protection, and its principle is to utilize the synchronous electric tolerance information of measuring in real time in the electrical network, the electric network swim transfer case after the computational scheme excision.If near certain guard space III section action after the circuit excision, then the actual measurement power flow changing situation of action protection compares with the trend transfer case that calculates.If the two is consistent, think that then the action of this place's III of Distance section is to be shifted by the trend that front moment circuit excision produces to cause, locking III of Distance section prevents malfunction immediately; If the two is inconsistent, think that then the action of III section is to be caused by troubles inside the sample space, namely open distance III section is with Fault Isolation.
The advantage of above thinking is all to have improved the reliability of protection from different angles, but for first method, because the complexity of actual electric network and the flexibility of operational mode, so that often there is crossover region in the measurement impedance of troubles inside the sample space and accident overload, when formulating the load limit characteristic, when guaranteeing internal fault sensitivity and faulty action preventing reliability, be difficult to find suitable balance point; For second method, when the information of utilizing protection installation place self arranges assistant criteria, when subordinate's element fault, because protection is too far away with the fault point distance, and can't estimate the impact that other branch roads of distance station produce, therefore how guarantee that assistant criteria is still waiting further research to the sensitivity of subordinate's line fault; For the third method, the synchronous electric tolerance information that trend shifts identification to be needed to gather each node of electrical network is calculated in conjunction with the electric network element parameter, and high to the synchronous condition requirement, information interaction and operand are larger.
Summary of the invention
For the defective of above problem and the easy malfunction of traditional III of Distance section overload, the present invention proposes a kind of III of Distance section faulty action preventing system and method based on the two class fault signatures in zone.This invention is from the reality of electric power system; lay particular emphasis on and improve emergency function far away; utilize protection system fault signature and electric network fault feature open distance III section in the zone; can be before electric power system realizes that the backup protection principle is thoroughly reformed; effective range of lift III section faulty action preventing, anti-cascading trip ability; improve emergency function far away, guarantee that the transitional period security of system effectively moves.
Based on the III of Distance section faulty action preventing system of the two class fault signatures in zone, this system comprises two modules: protection system fault signature module and electric network fault characteristic module.Wherein, protection system fault signature module comprise judge in the subordinate station TV, TA whether break part, judge whether the subordinate station loses sync section with the phase neighboring station, judge subordinate station and phase neighboring station whether the communication disruption part, judge whether subordinate's protective device of standing lost efficacy partly, judges and stand subordinate whether partial information lacks or the full detail interrupt unit, and this module utilizes the realization of protection system fault signature to opening or the locking of higher level's element III segment protect; The electric network fault characteristic module comprises the electric network fault characteristic module comprises judging whether certain protection of station outlet of III segment protect installation place and subordinate satisfies the operating criterion part, judge whether subordinate's station busbar voltage satisfies multiple press strip spare part, judge whether subordinate's certain bar outlet (comprising III section place circuit) of standing is in the non-full-operating state part, and this module utilizes the realization of electric network fault feature to opening or the locking of higher level's element III segment protect.In this system, the fault characteristic information that protection system fault signature module and electric network fault characteristic module utilize regional main website to gather simultaneously judges whether respectively to satisfy protection system fault signature and electric network fault feature.The electric network fault characteristic module is to the replenishing of protection system fault signature module, and can open equally when the III of Distance segment protect is broken down in nearby sphere; Further make protection system reform transitional III of Distance section faulty action preventing in the backup protection principle, prevent that the cascading trip ability is improved, emergency function far away improves.
Based on the III of Distance section faulty action preventing method of the two class fault signatures in zone, the method comprising the steps of:
Step 1: when level system broke down instantly, higher level's protective device judged whether action according to III of Distance section operating criterion;
Step 2: protection system fault signature module comprises judge in the subordinate station TV, TA whether break part, judge whether the subordinate station loses sync section with the phase neighboring station, judge subordinate station and phase neighboring station whether the communication disruption part, judge whether subordinate's protective device of standing lost efficacy partly, judges and whether stand subordinate partial information lacks or the full detail interrupt unit utilizes respectively the fault characteristic information of regional main website collection to judge whether fault of protection system;
Simultaneously, whether judge III segment protect installation place and subordinate's certain protection of station outlet in the electric network fault characteristic module satisfy the operating criterion part, judge whether subordinate station busbar voltage satisfies multiple press strip spare part, judge whether subordinate's certain bar outlet (comprising III section place circuit) of standing is in non-full-operating state and partly utilizes respectively the fault characteristic information that gathers in the regional main website to judge whether fault of electrical network;
Step 3:: the output signal of protection system malfunctioning module and electric network fault characteristic module is done exclusive disjunction, sends the locking of III of Distance section or open logical signal;
Step 4: logical signal is done and computing in the actuating signal of step 1 middle distance III segment protect and the step 3, the whether deferred action of judging distance III section.
Concrete analysis of cases shows, can realize good faulty action preventing effect based on the succinct practical principle of the III of Distance section faulty action preventing system and method utilization of the two class fault signatures in zone, III of Distance section faulty action preventing, anti-cascading trip ability have effectively been promoted, perfect emergency function far away, guarantee that the transitional period security of system effectively moves, its logic diagram as shown in Figure 2.
1. protection system fault signature module
Since the III of Distance section as the reserve far away of subordinate's element be not will aspect the sensitivity for the complete protection of subordinate's element self provides reserve, but to provide reserve because of the situation of improper reason inefficacy tripping for it at subordinate's element autoprotection.Therefore can be with the abnormal condition of protection system as triggering; the fault signature that utilizes regional backup protection platform to gather subordinate's station protection system is opened the III of Distance section of higher level's element; so only need in the function of giving full play to the backup protection of III of Distance section, to avoid largely the generation of overload mis-operation by the principle of succinct practicality.Wherein, protection system fault signature module comprises following:
1) judges in the subordinate station TV, the TA part that whether breaks
When certain station TV, TA break in the system; often need locking relevant distance, current protection; for non-latching protection, also may be owing to the transformer disconnection measure error cause protecting greatly tripping, the transformer disconnection information of therefore subordinate can being stood starts feature as one.TV, TA the broken string special identical criterion is arranged, original protective device namely comprises this function transformer station in, thus the locality protection main frame need not to repeat the differentiation, the differentiation result at fault station can be uploaded for application.
2) judge whether the subordinate station loses sync section with the phase neighboring station
At present the general distribution stream of ultra-high-tension power transmission line differential protection is as main protection, and current differential protection is simple with its principle, it is reliable to be active in one's movements, it is leading in the power line main protection of multiple principle to be subjected to various factors to affect the advantage such as little.Lose when synchronous with the phase neighboring station when certain subordinate station, the current differential of respective lines will be blocked, and be the reliability that improves failure removal, and can open III of Distance section that should the station this moment.
If the popularization and application along with PMU, the current differential synchronizing signal is provided by the PMU device between station in the future, perhaps differentiate between the station " table tennis to time method " whether accurate synchronization by the PMU device is auxiliary, then except poor stream out-of-limit also can be with the fault message of PMU device or auxiliary differentiation result as losing synchronous characteristic signal.
3) judge whether communication disruption part of subordinate station and phase neighboring station
Communication disruption is to lose synchronously even more serious a kind of situation between the two-phase neighboring station, and all pilot protections of corresponding line will lose efficacy this moment, is necessary that open higher level's III of Distance section provides emergency function far away.
4) judge the subordinate station protective device part that whether lost efficacy
When certain cover protective device lost efficacy in the station, for the protective device of dual, wherein a cover lost efficacy and can reduce protection reliability, and for the protective device that a cover is only arranged, inefficacy will mean this protection tripping.Therefore when learning that protective device lost efficacy, higher level's III section can be opened.
5) judge subordinate whether stand partial information disappearance or full detail interrupt unit
This situation and feature 3) different, the communication failure of this situation mainly occurs in the scope of subordinate station self.The partial information disappearance may be that at this moment the protection of bus, transformer and this station outlet all can be affected in the station, should open higher level's III section in support owing to the damage of station communication network portion causes.Owing to being equipped with station territory backup protection main frame in each station, the territory main frame of stand is by concentrating full station information to be used for identification station internal fault, so the feature of partial information disappearance can be identified by territory, station Host Detection, and will differentiate the result and upload regional host computer.
2. electric network fault characteristic module
Protection system fault signature module, the principle by succinct practicality has realized good faulty action preventing effect.If but the related elements of protective device breaks down, and just in time because undiscovered protection system fault causes the tripping of element autoprotection, then because the III section is in blocking and can not provides emergency function far away for it, cause fault to excise; On the other hand, when the line failure of III of Distance section place, even the sound operation of the relevant protection system of this circuit is wished still that the III of Distance section can assist to bear nearly emergency function, to increase the sensitivity of protecting integral body.
Therefore in order further to improve reasonability and the practicality of this system; except utilizing protection system fault signature open distance III section; also need replenish the startup measure that utilizes the electric network fault feature, can open equally when the III of Distance segment protect is broken down in nearby sphere.Further make protection system reform transitional III of Distance section faulty action preventing in the backup protection principle, prevent that the cascading trip ability is improved, emergency function far away improves.Wherein the electric network fault characteristic module comprises:
1) judges whether certain protection of station outlet of III segment protect installation place and subordinate satisfies the operating criterion part
Formula (1) and (2) start-up criterion during as circuit unbalanced fault and symmetric fault is one of measure of present III of Distance section faulty action preventing.But when using this criterion, because platform constraints, information is only picked up from III of Distance segment protect installation place in the past.
But on the regional backup protection platform, because regional host computer has possessed the ability of concentrating many information, can obtain subordinate's fault signature that each outlet protection reacts of standing.Then when certain a bit breaks down since with change the time that criterion (1) is satisfied in the protection that is positioned at the same circuit, (2) can sensitive moves, and with the opening of higher level's route protection III section, realize its emergency function far away.And the judgement of criterion (1), (2) is carried out in higher level's protection simultaneously, then helps when higher level's line fault III of Distance section sensitivity to be opened, and assists and bears nearly emergency function.
2) judge whether subordinate's station busbar voltage satisfies multiple press strip spare part
The multiple press strip spare of bus is:
Multiple press strip spare is made of jointly phase low-voltage, negative sequence voltage and residual voltage criterion, and wherein negative phase-sequence and residual voltage theoretical value when circuit overload is zero, can malfunction.And the bus minimum voltage is not less than 80% of rated voltage when it has been generally acknowledged that overload, so lower voltage components is adjusted and is 0.7U
NHas reliability.Press again criterion (3) can be in subordinate station station sensitive action during element fault, higher level's III of Distance section is open, in standing, can provide reserve far away with failure removal by the III section during element protection tripping.Press again simultaneously element that the outlet fault is also had certain respond.
3) judge whether subordinate's certain bar outlet (comprising III section place circuit) of standing is in the non-full-operating state part
The voltage levels circuit often is furnished with single-pole reclosing, non-full phase circuit zero sequence direction protection meeting locking during the single-pole reclosing, and adjacent lines zero sequence current differential protection sensitivity meeting descends.Different from the two kinds of features in front, there is not short trouble this moment, but because the protection system hydraulic performance decline, also can be with the opening of higher level's III segment protect to tackle at any time contingent fault.The circuit breaker jump also can cause open-phase operation except single-phase coincidence, can be by same state processing.Because open-phase operation belongs to disconnection fault, therefore can be used as a kind of of electric network fault feature.
Beneficial effect of the present invention: for the problem of current distance III section faulty action preventing corrective measure existence and the defective of the easy malfunction of traditional III of Distance section overload, the present invention proposes a kind of III of Distance section faulty action preventing system and method based on the two class fault signatures in zone.This invention is from the reality of electric power system; lay particular emphasis on and improve emergency function far away; utilize protection system fault signature and electric network fault feature open distance III section in the zone; can be before electric power system realizes that the backup protection principle is thoroughly reformed; effective range of lift III section faulty action preventing, anti-cascading trip ability; improve emergency function far away, guarantee that the transitional period security of system effectively moves.At first; when level system breaks down instantly; higher level's protective device judges whether action according to III of Distance section operating criterion, and the protection system fault signature and the electric network fault feature that gather in protection system fault signature module and the electric network fault characteristic module utilization zone simultaneously determine whether open distance III section.Then, according to the whether deferred action of the output information judging distance III section of protection system fault signature module and electric network fault characteristic module.Concrete analysis of cases shows, can realize good faulty action preventing effect based on the succinct practical principle of the III of Distance section faulty action preventing system utilization of the two class fault signatures in zone, III of Distance section faulty action preventing, anti-cascading trip ability have effectively been promoted, perfect emergency function far away guarantees that the transitional period security of system effectively moves.
Description of drawings
Fig. 1 is III of Distance section load limit characteristic schematic diagram.
Fig. 2 is III of Distance section faulty action preventing logical schematic provided by the present invention.
Fig. 3 is protection system fault signature schematic diagram.
Fig. 4 is III of Distance section faulty action preventing example logical schematic provided by the present invention.
Embodiment
Further specify the books invention below in conjunction with drawings and Examples.
A kind of III of Distance section faulty action preventing system based on the two class fault signatures in zone, as shown in Figure 3, Fig. 3 is protection system fault signature schematic diagram.Take the III of Distance section of protecting 1 place as example, B
2Standing is its subordinate station, then protects the complete logic of III of Distance section faulty action preventing at 1 place can be expressed as Fig. 4.
1. protection system fault signature module
The fault signature that utilizes regional backup protection platform to gather subordinate's station protection system is opened the III of Distance section of higher level's element.
1) certain TV, TA broken string in the subordinate station
Work as B
2Stand certain TV, TA when broken string (such as Fig. 3 situation a); often need locking relevant distance, current protection; for non-latching protection, also may be owing to the transformer disconnection measure error cause protecting greatly tripping, the transformer disconnection information of therefore subordinate can being stood starts feature as one.
TV, TA broken string has special identical criterion, and original protective device namely comprises this function in the transformer station, so the locality protection host B
0Need not to repeat to differentiate, can be with B
2The differentiation result who stands uploads for application.
2) the subordinate station loses with certain phase neighboring station synchronously
Work as B
2Stand and B
3The station loses (such as Fig. 3 situation b) when synchronous, circuit L
3Current differential will be blocked, be to improve the reliability of failure removal, signal that can poor stream is out-of-limit is as losing synchronous signal, and this signal is uploaded to the B of main website
0III of Distance section with open and protection 1.If it is to be caused by the TA broken string that difference flows out-of-limit, the III section still can be opened.
3) subordinate station and certain phase neighboring station communication disruption
Communication disruption between the two-phase neighboring station (such as Fig. 3 situation c) is to lose synchronously even more serious a kind of situation, and all pilot protections of corresponding line will lose efficacy this moment, is necessary that open higher level's III of Distance section provides emergency function far away.For this situation, B
2Stand can by with certain phase neighboring station certain hour in no signal exchange as the feature of communication disruption, and this signal uploaded the regional B of main website
0
4) subordinate stands, and certain overlaps protective device inefficacy
Work as B
2When standing certain cover protective device inefficacy (such as Fig. 3 situation d), for the protective device of dual, wherein a cover lost efficacy and can reduce protection reliability, and for a protective device that overlaps is only arranged, inefficacy will mean this protection tripping.Therefore when learning that protective device lost efficacy, higher level's III section can be opened.
5) subordinate station partial information disappearance or full detail interrupt
This situation and feature 3) different, the communication failure of this situation mainly occurs in the scope of subordinate station self (such as Fig. 3 situation e).The partial information disappearance may be that at this moment the protection of bus, transformer and this station outlet all can be affected in the station, should open higher level's III section in support owing to the damage of station communication network portion causes.Owing to being equipped with station territory backup protection main frame in each station, the territory main frame of stand is by concentrating full station information to be used for identification station internal fault, so the feature of partial information disappearance can be identified by territory, station Host Detection, and will differentiate the result and upload regional host computer.
2. electric network fault characteristic module
Utilize regional backup protection platform to gather the III of Distance section that the electric network fault feature is opened higher level's element.
1) formula (1) and (2) are satisfied in certain protection of outlet of III segment protect installation place and subordinate station
Protect 1 as example take Fig. 3, then as the circuit L of subordinate
2K
1When point breaks down, because distance between protection 1 and the fault point, and be subjected to B
2The stand impact of other branch roads probably makes criterion (1) and (2) tripping of protection 1, and then makes the tripping of III of Distance section.
But on the regional backup protection platform, because regional host computer has possessed the ability of concentrating many information, can obtain subordinate's fault signature that each outlet protection reacts of standing, namely protect the information at 2,3,5 places.Then work as K
1When point breaks down, because protection 3 and K
1Point is positioned at the same circuit, and its criterion (1), (2) can sensitive be moved, and will protect 1 place's III section open, realizes its emergency function far away.And protect 1 to carry out simultaneously the judgement of criterion (1), (2), then help at circuit L
1During fault that the III of Distance section is sensitive open, assist and bear nearly emergency function.
2) subordinate station busbar voltage satisfies multiple press strip spare
Protect 1 as example take Fig. 3, multiple press strip spare is made of jointly phase low-voltage, negative sequence voltage and residual voltage criterion, and wherein negative phase-sequence and residual voltage theoretical value when circuit overload is zero, can malfunction.And the bus minimum voltage is not less than 80% of rated voltage when it has been generally acknowledged that overload, so lower voltage components is adjusted and is 0.7U
NHas reliability.B
2The busbar voltage of standing satisfies condition of negative pressure.
3) subordinate's certain bar outlet (comprising III section place circuit) of standing is in non-full-operating state
Protect 1 as example take Fig. 3, the voltage levels circuit often is furnished with single-pole reclosing, non-full phase circuit zero sequence direction protection meeting locking during the single-pole reclosing, and adjacent lines zero sequence current differential protection sensitivity meeting descends.If this moment B
2Outlet L stands
2, L
3In certain bar circuit be in non-full-operating state, protect 1 place III section open.
The present invention is directed to the problem of current distance III section faulty action preventing corrective measure existence and the defective of the easy malfunction of traditional III of Distance section overload, proposed III of Distance section faulty action preventing system and faulty action preventing method based on the two class fault signatures in zone.This system is from the reality of electric power system; lay particular emphasis on and improve emergency function far away; utilize protection system fault signature and electric network fault feature open distance III section in the zone; can be before electric power system realizes that the backup protection principle is thoroughly reformed; effective range of lift III section faulty action preventing, anti-cascading trip ability; improve emergency function far away, guarantee that the transitional period security of system effectively moves.The present invention can realize good faulty action preventing effect, has effectively promoted III of Distance section faulty action preventing, anti-cascading trip ability, and perfect emergency function far away guarantees that the transitional period security of system effectively moves.
Claims (3)
1. based on the III of Distance section faulty action preventing system of the two class fault signatures in zone, it is characterized in that, this system comprises protection system fault signature module and electric network fault characteristic module;
Described protection system fault signature module utilizes the protection system fault signature to realize opening or locking to higher level's element III segment protect, comprise judge in the subordinate station TV, TA whether break part, judge whether the subordinate station loses sync section with the phase neighboring station, judge subordinate station and phase neighboring station whether communication disruption partly, judge whether subordinate's protective device of standing lost efficacy partly, judges and stand subordinate whether partial information lacks or the full detail interrupt unit;
Describedly judge in the subordinate station TV, the TA part that whether breaks, when certain station TV, TA break in the system, often need locking relevant distance, current protection, for non-latching protection, also may be owing to the transformer disconnection measure error cause protecting greatly tripping, the transformer disconnection information of therefore subordinate being stood starts feature as one;
Describedly judge whether subordinate station loses sync section with the phase neighboring station, be the general distribution stream of present ultra-high-tension power transmission line differential protection as main protection, standing when certain subordinate loses when synchronous with the phase neighboring station, the current differential of respective lines will be blocked; In addition, the current differential synchronizing signal is provided by the PMU device when between the station, perhaps differentiate between the station " table tennis to time method " whether accurate synchronization by the PMU device is auxiliary, then except poor stream out-of-limit also can be with the fault message of PMU device or auxiliary differentiation result as losing synchronous characteristic signal;
Describedly judge whether communication disruption part of subordinate station and phase neighboring station, that communication disruption is to lose synchronously even more serious a kind of situation between the two-phase neighboring station, all pilot protections of corresponding line will lose efficacy this moment, be necessary that open higher level's III of Distance section provides emergency function far away;
Describedly judging the subordinate station protective device part that whether lost efficacy, is when certain cover protective device lost efficacy in the station, and for the protective device of dual, wherein lost efficacy can the reduction protection reliability for a cover, and for a protective device that overlaps is only arranged, inefficacy will mean this protection tripping; Therefore when learning that protective device lost efficacy, higher level's III section can be opened;
Describedly judge subordinate whether stand partial information disappearance or full detail interrupt unit, that communication failure mainly occurs in the scope of subordinate station self, the partial information disappearance may be owing to the damage of station communication network portion causes, at this moment the protection of bus, transformer and this station outlet all can be affected in the station, should open higher level's III section in support; Owing to being equipped with station territory backup protection main frame in each station, the territory main frame of stand is by concentrating full station information to be used for identification station internal fault, so the feature of partial information disappearance can be identified by territory, station Host Detection, and will differentiate the result and upload regional host computer;
The electric network fault feature of utilizing described electric network fault characteristic module realizes opening or the locking to higher level's element III segment protect, comprise judging whether III segment protect installation place and subordinate's certain protection of station outlet satisfy the operating criterion part, judge subordinate's station busbar voltage whether satisfy again press strip spare partly, judge whether subordinate's certain bar outlet (comprising III section place circuit) of standing is in the non-full-operating state part;
Describedly judge whether station certain protection of outlet of III segment protect installation place and subordinate satisfies the operating criterion part, is on regional backup protection platform, and regional host computer possesses the ability of concentrating many information, obtain subordinate's fault signature that each outlet protection reacts of standing;
This above-mentioned III segment protect installation place and subordinate's station outlet protection criterion are:
I
2+I
0＞0.5I
1 (1)
When certain a bit broke down, criterion (1), (2) were satisfied in the protection that is positioned at the same circuit with the fault point, can sensitive move, and higher level's route protection III section is open, realize its emergency function far away; And the judgement of criterion (1), (2) is carried out in higher level's protection simultaneously, then helps when higher level's line fault III of Distance section sensitivity to be opened, and assists and bears nearly emergency function;
Describedly judge whether subordinate station busbar voltage satisfies multiple press strip spare part, is that multiple press strip spare is made of jointly phase low-voltage, negative sequence voltage and residual voltage criterion, and wherein negative phase-sequence and residual voltage theoretical value when circuit overload is zero, can malfunction; The multiple press strip spare of bus is:
Press again criterion sensitive action during element fault in subordinate station station, higher level's III of Distance section is open, in standing, can provide reserve far away with failure removal by the III section during element protection tripping;
Describedly judge whether subordinate's certain bar outlet (comprising III section place circuit) of standing is in the non-full-operating state part, that the voltage levels circuit often is furnished with single-pole reclosing, non-full phase circuit zero sequence direction protection meeting locking during the single-pole reclosing, adjacent lines zero sequence current differential protection sensitivity meeting descends, there is not short trouble this moment, but because the protection system hydraulic performance decline, also can be with the opening of higher level's III segment protect to tackle at any time contingent fault; The circuit breaker jump also can cause open-phase operation except single-phase coincidence, can be by same state processing; Because open-phase operation belongs to disconnection fault, therefore can be used as a kind of booster action that plays of electric network fault feature;
The fault characteristic information that described protection system fault signature module and electric network fault characteristic module utilize regional main website to gather simultaneously judges whether respectively to satisfy protection system fault signature and electric network fault feature.
2. the III of Distance section faulty action preventing system based on the two class fault signatures in zone according to claim 1; it is characterized in that; judge in the subordinate station TV, the TA part that whether breaks in the described protection system fault signature module; because TV, TA broken string has special identical criterion; original protective device namely comprises this function in the transformer station; the locality protection main frame need not to repeat to differentiate, the differentiation result at fault station can be uploaded for.
3. based on the III of Distance section faulty action preventing method of the two class fault signatures in zone, it is characterized in that, the method step is:
Step 1: when level system broke down instantly, higher level's protective device judged whether action according to III of Distance section operating criterion;
Step 2: protection system fault signature module comprises judge in the subordinate station TV, TA whether break part, judge whether the subordinate station loses sync section with the phase neighboring station, judge subordinate station and phase neighboring station whether the communication disruption part, judge whether subordinate's protective device of standing lost efficacy partly, judges and whether stand subordinate partial information lacks or the full detail interrupt unit utilizes respectively the fault characteristic information of regional main website collection to judge whether fault of protection system;
Simultaneously, whether judge III segment protect installation place and subordinate's certain protection of station outlet in the electric network fault characteristic module satisfy the operating criterion part, judge whether subordinate station busbar voltage satisfies multiple press strip spare part, judge whether subordinate's certain bar outlet (comprising III section place circuit) of standing is in non-full-operating state and partly utilizes respectively the fault characteristic information that gathers in the regional main website to judge whether fault of electrical network;
Step 3: the output signal of protection system malfunctioning module and electric network fault characteristic module is done exclusive disjunction, sends the locking of III of Distance section or open logical signal;
Step 4: logical signal is done and computing in the actuating signal of step 1 middle distance III segment protect and the step 3, the whether deferred action of judging distance III section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310214961.8A CN103326335B (en) | 2013-05-31 | 2013-05-31 | System and method for false action resistance of distance section III based on domain double-type fault characteristic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310214961.8A CN103326335B (en) | 2013-05-31 | 2013-05-31 | System and method for false action resistance of distance section III based on domain double-type fault characteristic |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103326335A true CN103326335A (en) | 2013-09-25 |
| CN103326335B CN103326335B (en) | 2015-06-10 |
Family
ID=49194940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310214961.8A Active CN103326335B (en) | 2013-05-31 | 2013-05-31 | System and method for false action resistance of distance section III based on domain double-type fault characteristic |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103326335B (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103715669A (en) * | 2014-01-07 | 2014-04-09 | 华北电力大学 | Distributed wide-area self-adaptive inter-phase backup protection system and method |
| CN104113048A (en) * | 2014-06-24 | 2014-10-22 | 中国石油化工股份有限公司 | Intelligent protection system of distribution network |
| CN104332967A (en) * | 2014-10-15 | 2015-02-04 | 国家电网公司 | Distance protection III segment fault opening judging method |
| CN104578006A (en) * | 2014-12-19 | 2015-04-29 | 清华大学 | Accident overload blocking method for station territory distance protection section III |
| CN104635085A (en) * | 2015-02-04 | 2015-05-20 | 南京南瑞继保电气有限公司 | Method for distinguishing load from fault |
| CN104659761A (en) * | 2014-10-06 | 2015-05-27 | 华北电力大学（保定） | Method for preventing misoperation of distance III section protection due to overload |
| CN105207185A (en) * | 2015-10-15 | 2015-12-30 | 华北电力大学（保定） | Wide-area backup protecting method capable of preventing cascading trip of line |
| CN106229950A (en) * | 2016-09-17 | 2016-12-14 | 国网内蒙古东部电力有限公司通辽供电公司 | A kind of intelligent substation integration protection method |
| CN106486979A (en) * | 2016-10-31 | 2017-03-08 | 华北电力大学 | Pilot protection system and method between a kind of station with remote emergency function |
| CN107104421A (en) * | 2017-04-13 | 2017-08-29 | 华南理工大学 | A kind of voltage longitudinal protection method of distribution network comprising inverse distributed power |
| WO2018227485A1 (en) * | 2017-06-15 | 2018-12-20 | Abb Schweiz Ag | Method, system and apparatus for fault detection |
| CN109066607A (en) * | 2018-07-17 | 2018-12-21 | 中国电力科学研究院有限公司 | A kind of voltage acceleration method and device of the change time limit distance protection for power network line |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101741069A (en) * | 2009-12-24 | 2010-06-16 | 北京四方继保自动化股份有限公司 | Shutting method for preventing impedance relay from false operation owing to 'in-phase problem' |
| CN102611082A (en) * | 2011-11-29 | 2012-07-25 | 陕西电力科学研究院 | Self-adaptive feeder neighborhood interactive fault-tolerant relay protection method for power distribution network |
| US20120206149A1 (en) * | 2009-11-18 | 2012-08-16 | Abb Research Ltd. | Method and Apparatus for Ground Distance Protection |
-
2013
- 2013-05-31 CN CN201310214961.8A patent/CN103326335B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120206149A1 (en) * | 2009-11-18 | 2012-08-16 | Abb Research Ltd. | Method and Apparatus for Ground Distance Protection |
| CN101741069A (en) * | 2009-12-24 | 2010-06-16 | 北京四方继保自动化股份有限公司 | Shutting method for preventing impedance relay from false operation owing to 'in-phase problem' |
| CN102611082A (en) * | 2011-11-29 | 2012-07-25 | 陕西电力科学研究院 | Self-adaptive feeder neighborhood interactive fault-tolerant relay protection method for power distribution network |
Non-Patent Citations (3)
| Title |
|---|
| 朱晓彤等: "防止过负荷时相间距离Ⅲ段保护误动的新方法", 《电力系统保护与控制》, vol. 39, no. 9, 1 May 2011 (2011-05-01), pages 7 - 11 * |
| 李琛: "以变电站为基本单元的广域后备保护系统", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》, 15 December 2012 (2012-12-15) * |
| 马静等: "基于广域信息多端高压输电区域后备保护", 《电力系统保护与控制》, vol. 40, no. 11, 1 June 2012 (2012-06-01), pages 61 - 69 * |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103715669A (en) * | 2014-01-07 | 2014-04-09 | 华北电力大学 | Distributed wide-area self-adaptive inter-phase backup protection system and method |
| CN104113048B (en) * | 2014-06-24 | 2017-11-10 | 中国石油化工股份有限公司 | A kind of power distribution network intelligent protection system |
| CN104113048A (en) * | 2014-06-24 | 2014-10-22 | 中国石油化工股份有限公司 | Intelligent protection system of distribution network |
| CN104659761A (en) * | 2014-10-06 | 2015-05-27 | 华北电力大学（保定） | Method for preventing misoperation of distance III section protection due to overload |
| CN104659761B (en) * | 2014-10-06 | 2018-05-22 | 华北电力大学（保定） | The method for preventing the protection of III of Distance section from making by overload mis-operation |
| CN104332967A (en) * | 2014-10-15 | 2015-02-04 | 国家电网公司 | Distance protection III segment fault opening judging method |
| CN104578006A (en) * | 2014-12-19 | 2015-04-29 | 清华大学 | Accident overload blocking method for station territory distance protection section III |
| CN104578006B (en) * | 2014-12-19 | 2018-04-10 | 清华大学 | The accident overload blocking method for domain distance protection III sections of standing |
| CN104635085A (en) * | 2015-02-04 | 2015-05-20 | 南京南瑞继保电气有限公司 | Method for distinguishing load from fault |
| CN105207185A (en) * | 2015-10-15 | 2015-12-30 | 华北电力大学（保定） | Wide-area backup protecting method capable of preventing cascading trip of line |
| CN106229950A (en) * | 2016-09-17 | 2016-12-14 | 国网内蒙古东部电力有限公司通辽供电公司 | A kind of intelligent substation integration protection method |
| CN106486979A (en) * | 2016-10-31 | 2017-03-08 | 华北电力大学 | Pilot protection system and method between a kind of station with remote emergency function |
| CN107104421A (en) * | 2017-04-13 | 2017-08-29 | 华南理工大学 | A kind of voltage longitudinal protection method of distribution network comprising inverse distributed power |
| CN107104421B (en) * | 2017-04-13 | 2019-04-09 | 华南理工大学 | A kind of voltage longitudinal protection method of distribution network comprising inverse distributed power |
| WO2018227485A1 (en) * | 2017-06-15 | 2018-12-20 | Abb Schweiz Ag | Method, system and apparatus for fault detection |
| US11885843B2 (en) | 2017-06-15 | 2024-01-30 | Hitachi Energy Ltd. | Method, system and apparatus for fault detection |
| CN109066607A (en) * | 2018-07-17 | 2018-12-21 | 中国电力科学研究院有限公司 | A kind of voltage acceleration method and device of the change time limit distance protection for power network line |
| CN109066607B (en) * | 2018-07-17 | 2021-11-26 | 中国电力科学研究院有限公司 | Voltage acceleration method and device for variable time-limit distance protection of power grid line |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103326335B (en) | 2015-06-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103326335B (en) | System and method for false action resistance of distance section III based on domain double-type fault characteristic | |
| Memon et al. | A critical review of AC Microgrid protection issues and available solutions | |
| Mirsaeidi et al. | Towards hybrid AC/DC microgrids: Critical analysis and classification of protection strategies | |
| EP2331978B1 (en) | Method and device for supervising secondary circuit of instrument transformer in power system | |
| CN103151842B (en) | Hierarchical protection control system facing regional power grid | |
| Choudhary et al. | A review on microgrid protection | |
| CN112595930B (en) | Backup protection method for petal type urban power grid area containing distributed power supply | |
| Sharafi et al. | Transmission system wide-area back-up protection using current phasor measurements | |
| Zamani et al. | A communication-based strategy for protection of microgrids with looped configuration | |
| CN101800441B (en) | Method for processing boundary information deficiency of centralized protector of digitalized converting station | |
| CN102064613A (en) | Fault locking method for relay protection in digital substation | |
| CN104253421B (en) | A kind of common-tower double-circuit lines relay protection Optimal Configuration Method shared based on station domain information | |
| CN106207985A (en) | Incoming relay-protection subsidiary discriminant sectionalized single busbar connection bus differential protection locking spare power automatic switching method | |
| CN104901292A (en) | Power distribution network current protection system and method | |
| CN111948490B (en) | Fault positioning and processing method for active power distribution network | |
| CN105356430B (en) | Active closed loop power distribution network protection system and method | |
| Horowitz et al. | Blackouts and relaying considerations-Relaying philosophies and the future of relay systems | |
| CN109787202B (en) | Reverse power protection method for point network containing DERs by comparing positive sequence current directions | |
| Chandraratne et al. | Smart grid protection through self-healing | |
| CN112531661A (en) | Station domain failure protection method and system based on switching value signals | |
| CN103683216A (en) | Busbar differential protection method | |
| CN110416981A (en) | A kind of access power distribution network zone current guard method of electric car and system | |
| JP5450149B2 (en) | Distribution line ground fault protection relay system | |
| CN105186464B (en) | One kind 3/2 switchs main electrical scheme breaker fail protection method | |
| CN105098736A (en) | Buscouple protection method with outgoing line reactor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |