CN103532237A - Wide-area protection control system based on IEEE1588 network timing protocol - Google Patents
Wide-area protection control system based on IEEE1588 network timing protocol Download PDFInfo
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- CN103532237A CN103532237A CN201310495745.5A CN201310495745A CN103532237A CN 103532237 A CN103532237 A CN 103532237A CN 201310495745 A CN201310495745 A CN 201310495745A CN 103532237 A CN103532237 A CN 103532237A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0658—Clock or time synchronisation among packet nodes
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Abstract
The invention discloses a wide-area protection control system based on an IEEE (Institute of Electrical and Electronics Engineers) 1588 network timing protocol. A station area protection control function for transformer stations is realized through the sharing of data in the transformer stations based on a high-speed data communication network and network timing synchronous data. A regional power grid is formed by a plurality of closely-related transformer stations, realizing a regional protection control function. A wide-area power grid is formed by a plurality of closely-related regional power grids, realizing a wide-area protection control function. Each regional master station in the wide-area power grid is interconnected with a transformer station area substation in the corresponding regional power grid through optical fibers, and the wide-area protection control system is built through the utilization of the whole-grid time synchronization, data synchronization and information sharing of the IEEE 1588 network timing protocol. The protection control system has the advantages of short protection action time and better selectivity. The regional power grids can be more effectively and reasonably controlled and scheduled by the protection control system than the traditional control device which is configured at an interval. Besides, the control function of the wide-area power grid can also be realized, and the requirement on wide-area stable control can be met.
Description
Technical field
The invention belongs to relay protection of power system and safety control technology field, particularly a kind of based on IEEE1588 network to time agreement wide area protection control system.
Background technology
Along with the development of Power System Interconnection and electricity market, electric power system will day by day approach its operational limit, and its operation and control will be more complicated, and the possibility that disturbance and fault occur is larger, and consequence is also more serious, and this has higher requirement to stable control.
Conventional relaying protection is for realizing after electric power system is broken down the automatic of fault element and excision, isolated fault fast, to guarantee the normal operation partly of the person and device security and fault-free.Existing relaying protection and automatic safety device can not adapt to the requirement of power system development, and subject matter is as follows:
Protection operating criterion is all based on local measurement data, and its selectivity requires relaying protection can only protect local network, does not consider the impact of fault on whole electrical network, is difficult to the objective system of the continuous variation of operational mode to make comprehensive reflection.Protective device lacks effective coordination each other, is difficult to realize the safe and stable operation of the system overall situation, in some cases the operation conditions of (as cascading failure occurs) meeting deterioration system.In high load capacity period, the through-put power on these crucial interconnections may approach the transmission power limit.The ability of the system disturbance rejection of operation reduces greatly in this case, is easy to cause all the other circuit overloads and disconnection in succession because an interconnection generation contingent disconnects, thereby accident is spread, and even causes system crash.The U.S. 8.14 has a power failure on a large scale accident at first from several circuits disconnect in succession.
Although conventional backup protection has larger protection range, it optionally obtains will take that to sacrifice rapidity be cost, and operate time is long, is sometimes difficult to bring into play due protective effect.In the middle of existing relaying protection configuration, the time limit setting of backup protection is followed ladder principle of timeliness, and in order to guarantee selectivity, the operation time limit of backup protection may be up to the several seconds.In electrical network scale and complexity, increasing in the situation that, this problem is more aobvious outstanding, still cannot well solve so far.
The Main Function of automatic safety device is the safe and stable operation of safeguarding electrical network, in case of emergency takes load shedding, the modes such as machine and system splitting operation of cutting avoid mains breakdown and cause the accident of having a power failure on a large scale.The automatic safety device of at present electric power system and protective relaying device are two to overlap independently system, lack effectively communication and coordinate between the two, cannot accurately reflect the situation of change of whole system.
Along with laying in a large number of the development of the computer and network communication technology, particularly optical fiber, for obtaining the Wide Area Power multiple spot electric parameters and quantity of state information, provide necessary Information base.Meanwhile, along with the enhancing of computer process ability, for relaying protection system and automated security control system are integrated hardware condition is provided.
Summary of the invention
For overcoming the above-mentioned problems in the prior art, the present invention proposes a kind of based on IEEE1588 network to time agreement wide area protection control system.This system can complete route protection, tranformer protection, bus protection, malfunctioning switch protection, UFLS, low pressure Load Alleviation Function, the wide area prepared auto restart function of the Wide Area Power.
For achieving the above object, the present invention adopts following technical scheme:
IEEE1588 network to time agreement a wide area protection control system, it is characterized in that:
Described wide area protection control system comprises the wide area protection main website arranging in the locality protection main website that arranges in the protection substation, territory, station that arranges in the regional power grid being comprised of tight some transformer stations, the Wide Area Power being comprised of tight some regional power grids, each transformer station, each regional power grid, each the Wide Area Power;
Between acquisition execution unit under respectively stand protection substation, territory and ,Ge transformer station of locality protection main website under each locality protection main website under described the Wide Area Power and wide area protection main website, each regional power grid and protection substation, territory, station, all adopt high-speed data communications network, utilize IEEE1588 network to time agreement realize the whole network time synchronized, image data is synchronous, and quantity of state is synchronous; Bing wide area protection main website arranges main website clock source;
Based on high speed data network and network to time agreement, share the protection substation, territory, station that utilizes high speed data network that the synchrodata in transformer station is uploaded in transformer station, realizes substation areas of transformer station defencive function; Using association closely some transformer stations as a regional power grid, utilize high speed data network in the synchrodata of region Nei Ge transformer station, to deliver to locality protection main website, function is controlled in feasible region protection; Using association closely some regional power grids as a Wide Area Power, utilize high speed data network in the synchrodata of the Wide Area Power Nei Ge region main website, to deliver to wide area protection main website, realize wide area protection and control function; Described wide area protection control system realizes protection and the control of territory, station, region, the Wide Area Power by being arranged on the ,Ge of the wide area protection main website locality protection main website in protected the Wide Area Power and the protection substation, territory of standing.
The present invention further comprises following optimal technical scheme:
The transformer station of described wide area protection control system each arranged spaced data acquisition module and performance element, wide area protection control system utilizes IEEE1588 agreement to realize each transformer station of the Wide Area Power time mechanism, the voltage at each interval under substation, territory, power plant station, the synchro measure of electric current and quantity of state, and calculate the voltage of described correspondence, the amplitude of electric current, phase place, frequency, the information such as power, by high speed data network by calculated line voltage, the amplitude of electric current, phase place, frequency, the information such as power and the quantity of state data that measure are sent to this substation areas of transformer station protection substation together with calculating temporal information constantly, stand protection substation, territory according to the shared synchrodata of this website, judge whether that abnormal or fault appear in the element in our station, and then in the result that our station is calculated of protection substation, territory, station, deliver to the locality protection main website under our station.Locality protection main website in regional power grid calculates and analyzes to judge whether protected regional power grid abnormal and fault have occurred according to the shared synchrodata of sending on protection substation, territory, electrical network station, one's respective area and status information data; and then generate corresponding control command according to the result of judgement and the integrated information of regional power grid, by network, assign to protection substation, territory, corresponding station.Locality protection main website need to process the data of protection substation, territory, a plurality of station, just can complete and analyze and judgement, and be aided with protection substation, territory, station and work in coordination with protection and control function according to local result of determination.Wide area protection main website in the Wide Area Power calculates and analyzes to judge whether protected the Wide Area Power abnormal and fault have occurred according to the shared synchrodata of sending in comprised locality protection main website and status information data; and then generate corresponding control command according to the result of judgement and the integrated information of the Wide Area Power, by network, assign to corresponding locality protection main website.Wide area protection main website need to process the data that a plurality of locality protections are controlled, and just can complete and analyze and judgement, and the result of determination that is aided with locality protection main website basis work in coordination with protection and control function.The action command that protection substation, territory simultaneously execution area protection main website issues of standing records various information and the command information of our station simultaneously, in order to query analysis in the future;
Under our station is detected and determined in protection substation, territory, described station during line failure; while receiving the trip signal of locality protection main website transmission and the trip signal of wide area protection main website transmission simultaneously; by high speed data network, to the collection of corresponding interval, control performance element and send out tripping operation order, each side circuit breaker of tripping faulty line.
For the interconnector between the regional power grid under the Wide Area Power and the circuit in regional power grid, wide area protection main website and locality protection main website can be used respectively differential protection and integrated form backup protection by circuit in the Wide Area Power simultaneously.Integrated form backup protection adopts 2 segmentation distance protections, the protection of 2 sections of zero sequence directions, the TV rear 2 sections of overcurrent protections of breaking, overload protection.In the Wide Area Power, certain circuit causes this circuit out of service because of overload or fault; this circuit affiliated area protection main website or protection substation, territory, station can be improved overload protection current ration and the time definite value of same power section circuit automatically, thereby avoid cascading trip accident.
Under our station is detected and determined in protection substation, territory, described station during line failure; by network, to the collection control performance element of corresponding interval, send out tripping operation and make each side circuit breaker of tripping faulty line; through setting after time delay; if faulty line also has electric current; think this breaker failure; by protection substation, territory, station, by network, to corresponding interval collection, control performance element and send out the circuit breaker that jumping makes this faulty line upper level of tripping, avoid the further expansion of accident.
When described regional power grid breaks down and successfully excises fault Hou， locality protection main website according to regional power grid power distribution situation and regional power grid ruuning situation, start region prepared auto restart function, restore electricity, dwindle dead electricity scope.The data such as synchrodata can calmodulin binding domain CaM electrical network be shared by locality protection main website, meritorious, idle, the frequency of each node of COMPREHENSIVE CALCULATING regional power grid, estimate the situation after the prepared auto restart action of region, the object of powering to reach intelligent restoration.
It is described when the Wide Area Power makes a difference the large disturbance of the Wide Area Power safety and stability; wide area protection control system can realize the machine of cutting, cutting load, subtract the safety and stability such as exert oneself fast controls function; this wide area protection control system is the synchrodata system based on IEEE1588; to time precision can reach 1 microsecond, meet the requirement that the Wide Area Power safety and stability is controlled completely.
Accompanying drawing explanation
Be illustrated in figure 1 territory, station of the present invention Protection control system structural representation;
Be illustrated in figure 2 locality protection control system structural representation of the present invention;
Be illustrated in figure 3 wide area protection control system structural representation of the present invention.
Embodiment
According to Figure of description, technical scheme of the present invention is described in further detail below.
The invention discloses a kind of based on IEEE1588 network to time agreement wide area protection control system, this system be based on high-speed data communications network and Network Synchronization to time mechanism, utilize high speed data network that the synchrodata in transformer station is shared, realize substation areas of transformer station defencive function, the territory protection system structure chart of standing is as Fig. 1; Simultaneously using association closely some transformer stations as a regional power grid, utilize high speed data network in the synchrodata of region Nei Ge transformer station, to deliver to region main website, function is controlled in feasible region protection, locality protection system construction drawing is as Fig. 2; Using association closely some regional power grids as a Wide Area Power, utilize high speed data network in the synchrodata of the Wide Area Power Nei Ge region main website, to deliver to wide area main website, realize wide area protection and control function, wide area protection system construction drawing is as Fig. 3.Described Protection control system is realized protection and the control of territory, station, region, the Wide Area Power by being arranged on each region main website of protected the Wide Area Power and substation, territory, station.
The transformer station of described wide area protection control system each arranged spaced data acquisition module and performance element, described wide area protection control system utilize IEEE1588 network to time agreement realize the voltage to each each interval of transformer station of the Wide Area Power, the synchro measure of electric current and location status obtains the synchrodata of each transformer station, and calculate voltage corresponding to each interval, the amplitude of electric current, phase place, frequency, power, by high speed data network by calculated voltage, the amplitude of electric current, phase place, frequency, the data such as power are sent to this substation areas of transformer station protection substation together with calculating temporal information constantly, stand protection substation, territory according to the shared synchrodata of this transformer station, judge whether that abnormal or fault appear in the element in this transformer station, stand protection substation, territory Jiang Ben transformer station synchrodata and judge whether described element occurs delivering in the result of abnormal or fault the locality protection main website under our station, stand protection substation, territory in connection with our station judged result, the action command that execution area protection main website issues, various synchrodatas and the command information of while minute book Substation Station, prepare against query analysis in the future,
Locality protection main website calculates according to the shared synchrodata of sending on protection substation, territory, electrical network station, one's respective area and analyzes to judge whether protected regional power grid abnormal and fault have occurred, and then generate corresponding control command according to the result of judgement and the running status of regional power grid, by network, assign to protection substation, territory, corresponding station; The synchrodata data of sending on each substation that locality protection main website real-time storage is collected, and record the various command of assigning to protection substation, territory, station, prepare against query analysis in the future;
Wide area protection main website calculates according to the shared synchrodata of sending in comprised locality protection main website and analyzes to judge whether protected the Wide Area Power abnormal and fault have occurred, and then generate corresponding control command according to the result of judgement and the running status of the Wide Area Power, by high speed data network, assign to corresponding locality protection main website; The synchrodata of sending in while each locality protection main website of real-time storage of wide area protection main website, and record and assign the various command to locality protection main website, prepare against query analysis in the future.Under our station is detected and determined in protection substation, territory, described station during line failure; while receiving the trip signal of locality protection main website transmission and the trip signal of wide area protection main website transmission simultaneously; by high speed data network, to the collection of corresponding interval, control performance element and send out tripping operation order, each side circuit breaker of tripping faulty line.
For the interconnector between the regional power grid under the Wide Area Power, wide area protection main website carries out fault verification with differential protection, for the interconnector with branch, a side using one end of the branch nearest apart from power supply in the Wide Area Power as differential protection, using the electric current of other branch do phasor and calculate after as the other side of differential protection, using the phasor of both sides electric current and amplitude as differential current, using the poor amplitude of both sides electric current phasor as stalling current, adopt ratio-restrained characteristic to judge; Faulty line can be judged with differential protection by All Ranges interconnecting ties road in the Wide Area Power simultaneously by wide area protection main website, when there is current transformer circuit supervision fail, according to the setting of control word, determines whether Blocking Differential Protection;
For the interconnector between the regional power grid under the Wide Area Power, the synchrodata of the interconnector that the utilization of wide area protection main website is received is carried out integrated form backup protection, protection adopts 2 segmentation distance protections, 2 sections of zero sequence direction protections, TV rear 2 sections of overcurrent protections of breaking, overload protection;
For the interconnector between the regional power grid under the Wide Area Power, when 1 section of differential protection, 1 section of distance protection, zero-sequenceprotection does not all determine fault, with line direction incidence matrices, judge fault point time delay excision fault, according to the topological structure of protected the Wide Area Power system, form the Wide Area Power system relationship matrix, need the location status information real time modifying the Wide Area Power system relationship matrix according to the circuit breaker sending in each locality protection main website simultaneously, adopt direction component to carry out the screening of faulty line; Locality protection main website under interconnector is sent to wide area protection main website by forward and reverse judged result of the orientation measurement element of current circuit; wide area protection main website, according to the direction component judged result of sending in the incidence matrices of protected wide area power system topological structure and each locality protection main website, filters out faulty line.
In the Wide Area Power, certain interconnector causes this circuit out of service because of overload or fault, and this circuit affiliated area protection main website improves overload protection current ration and time definite value of same power section circuit automatically, thereby avoids cascading trip accident.
When the Wide Area Power system voltage starts low pressure off-load lower than predetermined value Shi， wide area protection main website, the regional power grid that selective system voltage is minimum, the order of then giving the locality protection main website transmission low pressure off-load that this regional power grid is corresponding;
Again adjust the system voltage of All Ranges electrical network in the Wide Area Power, the minimum regional power grid of selective system voltage, sends the order of low pressure off-load to corresponding locality protection main website again;
Repeat above step, until the Wide Area Power system voltage returns to allowed band.
When the Wide Area Power system frequency starts UFLS lower than predetermined value Shi， wide area protection main website, the regional power grid that selective system frequency is minimum, then corresponding locality protection main website sends the order of UFLS;
Again adjust the system frequency of All Ranges electrical network in the Wide Area Power, the minimum regional power grid of selective system frequency, sends the order of UFLS to corresponding region protection main website again;
Repeat above step, until the Wide Area Power system frequency returns to allowed band.
For circuit in regional power grid, locality protection main website adopts differential protection to carry out fault verification, for thering is circuit in the regional power grid of branch, a side using one end of the nearest branch of distance areas network system power supply as differential protection, using the electric current of other branch do phasor and calculate after as the other side of differential protection, using the phasor of both sides electric current and amplitude as differential current, using the poor amplitude of both sides electric current phasor as stalling current, adopt ratio-restrained characteristic to judge; Faulty line can be judged with differential protection by all circuits in regional power grid simultaneously by locality protection main website, when there is current transformer circuit supervision fail, according to the setting of control word, determines whether Blocking Differential Protection;
For circuit and other elements of belonging in a certain transformer station, the protection substation, territory of standing utilizes the synchrodata of sending on each interval of this transformer station integrated form backup protection of entirely standing, and wherein route protection adopts 2 sections of overcurrent protections, the overload protection after 2 segmentation distance protections, 2 sections of zero sequence direction protections, TV broken string; Main transformer and backup protection adopt phase segregated differential protection, zero sequence differential protection, composite voltage locking directional over-current protection;
For circuit in regional power grid, when 1 section of differential protection and distance protection, when 1 section of zero-sequenceprotection does not all determine fault, with line direction incidence matrices, judge fault point time delay excision fault, according to the topological structure of protected area network system, form regional power grid system relationship matrix, need according to the circuit breaker position state information real time modifying regional power grid system relationship matrix sending on each protection substation, territory, station simultaneously, adopt direction component to carry out the screening of faulty line, the protection substation, territory of standing is sent to locality protection main website by forward and reverse judged result of the orientation measurement element of current circuit, according to the direction component judged result of sending on the incidence matrices of protected regional power grid system topology and the protection substation, territory of respectively standing, filter out faulty line,
In regional power grid, certain circuit causes this circuit out of service because of overload or fault, and under this circuit, protection substation, territory, station is improved circuit overload protective current definite value and the time definite value of same power section automatically, thereby avoids cascading trip accident.
When regional power grid system voltage is during lower than predetermined value, regional power grid protection main website starts low pressure off-load, the substation bus bar that selective system voltage is minimum, and the load that rank is minimum is excised in the order of the low pressure off-load issuing according to wide area protection main website on this bus;
Again adjust the voltage of all substation bus bars in regional power grid, the minimum substation bus bar of selective system voltage again, the order of the low pressure off-load issuing according to wide area protection main website, excises the minimum load of rank on this bus;
Repeat above step, until regional power grid system voltage returns to allowed band.
When regional power grid system frequency is during lower than predetermined value, regional power grid protection main website starts UFLS, the substation bus bar that selective system frequency is minimum, the load that rank is minimum is then excised in the order of the UFLS issuing according to wide area protection main website on this bus;
Again adjust the frequency of all substation bus bars in regional power grid, the minimum substation bus bar of selective system frequency again, the order of the UFLS issuing according to wide area protection main website, excises the minimum load of rank on this bus;
Repeat above step, until regional power grid system frequency returns to allowed band.
Under our station is detected and determined in protection substation, territory, described station during line failure; while receiving the trip signal of locality protection main website transmission and the trip signal of wide area protection main website transmission simultaneously; by high speed data network, to the collection of corresponding interval, control performance element and send out tripping operation order; each side circuit breaker of tripping faulty line
Under our station is detected and determined in protection substation, territory, described station during line failure; by high speed data network, to the collection control performance element of corresponding interval, send out tripping operation and make each side circuit breaker of tripping faulty line; through setting after time delay; if faulty line also has electric current; think this breaker failure; by protection substation, territory, station, by network, to corresponding interval collection, control performance element and send out the circuit breaker that jumping makes this faulty line upper level of tripping, avoid the further expansion of accident.
When described regional power grid breaks down and successfully excises fault Hou， locality protection main website according to regional power grid power distribution situation and regional power grid ruuning situation, start region prepared auto restart function, restore electricity, dwindle dead electricity scope.The data such as synchrodata can calmodulin binding domain CaM electrical network be shared by locality protection main website, meritorious, idle, the frequency of each node of COMPREHENSIVE CALCULATING regional power grid, estimate the situation after the prepared auto restart action of region, the object of powering to reach intelligent restoration.
When described the Wide Area Power makes a difference the large disturbance of the Wide Area Power safety and stability; wide area protection control system can realize the machine of cutting, cutting load, subtract the safety and stability such as exert oneself fast controls function; this wide area protection control system is the synchrodata system based on IEEE1588; to time precision can reach 1 microsecond, meet the requirement that the Wide Area Power safety and stability is controlled completely.
Claims (10)
- Based on IEEE1588 network to time agreement a wide area protection control system, it is characterized in that:Described wide area protection control system comprises the wide area protection main website arranging in the locality protection main website that arranges in the protection substation, territory, station that arranges in the regional power grid being comprised of tight some transformer stations, the Wide Area Power being comprised of tight some regional power grids, each transformer station, each regional power grid, each the Wide Area Power;Between acquisition execution unit under respectively stand protection substation, territory and ,Ge transformer station of locality protection main website under each locality protection main website under described the Wide Area Power and wide area protection main website, each regional power grid and protection substation, territory, station, all adopt high-speed data communications network, utilize IEEE1588 network to time agreement realize the whole network time synchronized, image data is synchronous, and quantity of state is synchronous; Bing wide area protection main website arranges main website clock source;Based on high speed data network and network to time agreement, share the protection substation, territory, station that utilizes high speed data network that the synchrodata in transformer station is uploaded in transformer station, realizes substation areas of transformer station defencive function; Using association closely some transformer stations as a regional power grid, utilize high speed data network in the synchrodata of region Nei Ge transformer station, to deliver to locality protection main website, function is controlled in feasible region protection; Using association closely some regional power grids as a Wide Area Power, utilize high speed data network in the synchrodata of the Wide Area Power Nei Ge region main website, to deliver to wide area protection main website, realize wide area protection and control function; Described wide area protection control system realizes protection and the control of territory, station, region, the Wide Area Power by being arranged on the ,Ge of the wide area protection main website locality protection main website in protected the Wide Area Power and the protection substation, territory of standing.
- 2. wide area protection control system according to claim 1, is characterized in that:The transformer station of described wide area protection control system each arranged spaced data acquisition module and performance element, described wide area protection control system utilize IEEE1588 network to time agreement realize the voltage to each each interval of transformer station of the Wide Area Power, electric current and location status, it is the synchrodata that the synchro measure of quantity of state obtains each transformer station, and calculate voltage corresponding to each interval, the amplitude of electric current, phase place, frequency, power, by high speed data network by calculated voltage, the amplitude of electric current, phase place, frequency, the data such as power are sent to this substation areas of transformer station protection substation together with calculating temporal information constantly, stand protection substation, territory according to the shared synchrodata of this transformer station, judge whether that abnormal or fault appear in the element in this transformer station, stand protection substation, territory Jiang Ben transformer station synchrodata and judge whether described element occurs delivering in the result of abnormal or fault the locality protection main website under our station, various synchrodatas and the command information of while minute book Substation Station, prepare against query analysis in the future,Locality protection main website calculates according to the shared synchrodata of sending on protection substation, territory, electrical network station, one's respective area and analyzes to judge whether protected regional power grid abnormal and fault have occurred, and then generate corresponding control command according to the result of judgement and the running status of regional power grid, by network, assign to protection substation, territory, corresponding station; The synchrodata data of sending on each substation that locality protection main website real-time storage is collected, and record the various command of assigning to protection substation, territory, station, prepare against query analysis in the future;Wide area protection main website calculates according to the shared synchrodata of sending in comprised locality protection main website and analyzes to judge whether protected the Wide Area Power abnormal and fault have occurred, and then generate corresponding control command according to the result of judgement and the running status of the Wide Area Power, by high speed data network, assign to corresponding locality protection main website; The synchrodata of sending in while each locality protection main website of real-time storage of wide area protection main website, and record and assign the various command to locality protection main website, prepare against query analysis in the future;Under our station is detected and determined in protection substation, territory, described station during line failure; while receiving the trip signal of locality protection main website transmission and the trip signal of wide area protection main website transmission simultaneously; by high speed data network, to the collection of corresponding interval, control performance element and send out tripping operation order, each side circuit breaker of tripping faulty line.
- 3. wide area protection control system according to claim 1 and 2, is characterized in that:For the interconnector between the regional power grid under the Wide Area Power, wide area protection main website carries out fault verification with differential protection, for the interconnector with branch, a side using one end of the branch nearest apart from power supply in the Wide Area Power as differential protection, using the electric current of other branch do phasor and calculate after as the other side of differential protection, using the phasor of both sides electric current and amplitude as differential current, using the poor amplitude of both sides electric current phasor as stalling current, adopt ratio-restrained characteristic to judge; Faulty line can be judged with differential protection by All Ranges interconnecting ties road in the Wide Area Power simultaneously by wide area protection main website, when there is current transformer circuit supervision fail, according to the setting of control word, determines whether Blocking Differential Protection;For the interconnector between the regional power grid under the Wide Area Power, the synchrodata of the interconnector that the utilization of wide area protection main website is received is carried out integrated form backup protection, protection adopts 2 segmentation distance protections, 2 sections of zero sequence direction protections, TV rear 2 sections of overcurrent protections of breaking, overload protection;For the interconnector between the regional power grid under the Wide Area Power, when 1 section of differential protection, 1 section of distance protection, zero-sequenceprotection does not all determine fault, with line direction incidence matrices, judge fault point time delay excision fault, according to the topological structure of protected the Wide Area Power system, form the Wide Area Power system relationship matrix, need the location status information real time modifying the Wide Area Power system relationship matrix according to the circuit breaker sending in each locality protection main website simultaneously, adopt direction component to carry out the screening of faulty line; Locality protection main website under interconnector is sent to wide area protection main website by forward and reverse judged result of the orientation measurement element of current circuit; wide area protection main website, according to the direction component judged result of sending in the incidence matrices of protected wide area power system topological structure and each locality protection main website, filters out faulty line.In the Wide Area Power, certain interconnector causes this circuit out of service because of overload or fault, and this circuit affiliated area protection main website improves overload protection current ration and time definite value of same power section circuit automatically, thereby avoids cascading trip accident.
- 4. according to the wide area protection control system described in the arbitrary claim of claim 1-3, it is characterized in that:When the Wide Area Power system voltage starts low pressure off-load lower than predetermined value Shi， wide area protection main website, the regional power grid that selective system voltage is minimum, the order of then giving the locality protection main website transmission low pressure off-load that this regional power grid is corresponding;Again adjust the system voltage of All Ranges electrical network in the Wide Area Power, the minimum regional power grid of selective system voltage, sends the order of low pressure off-load to corresponding locality protection main website again;Repeat above step, until the Wide Area Power system voltage returns to allowed band.
- 5. according to the wide area protection control system described in the arbitrary claim of claim 1-3, it is characterized in that:When the Wide Area Power system frequency starts UFLS lower than predetermined value Shi， wide area protection main website, the regional power grid that selective system frequency is minimum, then corresponding locality protection main website sends the order of UFLS;Again adjust the system frequency of All Ranges electrical network in the Wide Area Power, the minimum regional power grid of selective system frequency, sends the order of UFLS to corresponding region protection main website again;Repeat above step, until the Wide Area Power system frequency returns to allowed band.
- 6. wide area protection control system according to claim 1 and 2, is characterized in that:For circuit in regional power grid, locality protection main website adopts differential protection to carry out fault verification, for thering is circuit in the regional power grid of branch, a side using one end of the nearest branch of distance areas network system power supply as differential protection, using the electric current of other branch do phasor and calculate after as the other side of differential protection, using the phasor of both sides electric current and amplitude as differential current, using the poor amplitude of both sides electric current phasor as stalling current, adopt ratio-restrained characteristic to judge; Faulty line can be judged with differential protection by all circuits in regional power grid simultaneously by locality protection main website, when there is current transformer circuit supervision fail, according to the setting of control word, determines whether Blocking Differential Protection;For circuit and other elements of belonging in a certain transformer station, the protection substation, territory of standing utilizes the synchrodata of sending on each interval of this transformer station integrated form backup protection of entirely standing, and wherein route protection adopts 2 sections of overcurrent protections, the overload protection after 2 segmentation distance protections, 2 sections of zero sequence direction protections, TV broken string; Main transformer and backup protection adopt phase segregated differential protection, zero sequence differential protection, composite voltage locking directional over-current protection;For circuit in regional power grid, when 1 section of differential protection and distance protection, when 1 section of zero-sequenceprotection does not all determine fault, with line direction incidence matrices, judge fault point time delay excision fault, according to the topological structure of protected area network system, form regional power grid system relationship matrix, need according to the circuit breaker position state information real time modifying regional power grid system relationship matrix sending on each protection substation, territory, station simultaneously, adopt direction component to carry out the screening of faulty line, the protection substation, territory of standing is sent to locality protection main website by forward and reverse judged result of the orientation measurement element of current circuit, according to the direction component judged result of sending on the incidence matrices of protected regional power grid system topology and the protection substation, territory of respectively standing, filter out faulty line,In regional power grid, certain circuit causes this circuit out of service because of overload or fault, and under this circuit, protection substation, territory, station is improved circuit overload protective current definite value and the time definite value of same power section automatically, thereby avoids cascading trip accident.
- 7. wide area protection control system according to claim 1, is characterized in that:When regional power grid system voltage is during lower than predetermined value, regional power grid protection main website starts low pressure off-load, the substation bus bar that selective system voltage is minimum, and the load that rank is minimum is excised in the order of the low pressure off-load issuing according to wide area protection main website on this bus;Again adjust the voltage of all substation bus bars in regional power grid, the minimum substation bus bar of selective system voltage again, the order of the low pressure off-load issuing according to wide area protection main website, excises the minimum load of rank on this bus;Repeat above step, until regional power grid system voltage returns to allowed band.
- 8. wide area protection control system according to claim 1, is characterized in that:When regional power grid system frequency is during lower than predetermined value, regional power grid protection main website starts UFLS, the substation bus bar that selective system frequency is minimum, the load that rank is minimum is then excised in the order of the UFLS issuing according to wide area protection main website on this bus;Again adjust the frequency of all substation bus bars in regional power grid, the minimum substation bus bar of selective system frequency again, the order of the UFLS issuing according to wide area protection main website, excises the minimum load of rank on this bus;Repeat above step, until regional power grid system frequency returns to allowed band.
- 9. wide area protection control system according to claim 1 and 2, is characterized in that:Under our station is detected and determined in protection substation, territory, described station during line failure; by high speed data network, to the collection control performance element of corresponding interval, send out tripping operation and make each side circuit breaker of tripping faulty line; through setting after time delay; if faulty line also has electric current; think this breaker failure; by protection substation, territory, station, by network, to corresponding interval collection, control performance element and send out the circuit breaker that jumping makes this faulty line upper level of tripping, avoid the further expansion of accident.When described regional power grid breaks down and successfully excises fault Hou， locality protection main website according to regional power grid power distribution situation and regional power grid ruuning situation, start region prepared auto restart function, restore electricity, dwindle dead electricity scope; The data such as locality protection main website calmodulin binding domain CaM electrical network is shared synchrodata, meritorious, idle, the frequency of each node of COMPREHENSIVE CALCULATING regional power grid, estimate the situation after the prepared auto restart action of region, to reach the object of intelligent restoration power supply.
- 10. wide area protection control system according to claim 1 and 2, is characterized in that:When described the Wide Area Power makes a difference the large disturbance of the Wide Area Power safety and stability; wide area protection control system can realize the machine of cutting, cutting load, subtract the safety and stability such as exert oneself fast controls function; this wide area protection control system is the synchrodata system based on IEEE1588; to time precision can reach 1 microsecond, meet the requirement that the Wide Area Power safety and stability is controlled completely.
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| CN104852405A (en) * | 2015-06-02 | 2015-08-19 | 广西电网有限责任公司 | Small hydropower station protection control system based on wide-area data sharing |
| CN104901758A (en) * | 2015-04-13 | 2015-09-09 | 北京四方继保自动化股份有限公司 | Double-plane clock synchronization method applied to wide-area protection control system |
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