CN103529709B - Electric power system fault Union Switch Device model implementation method and system thereof - Google Patents
Electric power system fault Union Switch Device model implementation method and system thereof Download PDFInfo
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Abstract
The present invention provides a kind of electric power system fault Union Switch Device model implementation method and system thereof, comprise: according to generators in power systems on-off mode, treatment situation, and the throwing of circuit, transformer stops state, it is determined that when the operation scheme of plant stand residing for prior fault Union Switch Device; The state of the whole power system of iterative; Relevant analog quantity and quantity of state is obtained from the bus of the corresponding plant stand of power system or branch road etc.; Differentiate current bus or branch road whether fault according to described analog quantity and quantity of state, if fault, differentiate the fault type of current bus or branch road; The trend shelves position of section belonging to fault type according to fault element, affiliated plant stand operation scheme, fault element, Query Database, obtains corresponding measure of control in database, by the measure of control action information of correspondence insertion event queue. The present invention can realize the accurate simulation to dissimilar fault Union Switch Device action behavior various in power system and control characteristic.
Description
Technical field
The present invention relates to the technical field of Power System Reliability control, particularly relate to a kind of electric power system fault Union Switch Device model implementation method and system thereof.
Background technology
Along with electrical network scale constantly expands, structure is increasingly sophisticated, in trans-regional long distance set, power transmission alternating current transmission passage or AC/DC parallel passway for transmitting electricity get more and more, and the employing of Novel power transmission technology makes the service performance of electrical network more and more complicated, and existing security defensive system is subject to severe challenge. Due to the imbalance of load and power source development, the power delivery between regional power grid increases day by day, the easy chain-react when running into various accident, thus causes huge financial loss. Fault Union Switch Device, as one of effective means preventing large-area power-cuts, raising power supply reliability, is widely used in electrical network. Owing to power system is a very complicated large-scale nonlinear system, when there is fault, in order to safeguard system stability, it is necessary to gather relevant information in a short period of time from vast region, accurately search corresponding control strategy, and realize rapidly corresponding measure of control. In order to meet the requirement of control speed and control accuracy simultaneously, Policy Table is usually adopted to carry out control decision.
At present, control strategy cut by fault connection has become one of content in the important routine work of power grid operation management personnel. Control strategy model is cut owing to current Power System Analysis simulation software not having fault connection at present, and fault Union Switch Device is with strong points, of a great variety, steering logic and function complicated, fault connection cuts what control strategy was obtained by artificial computational analysis substantially.Therefore, not only workload is big in the establishment that control strategy cut by fault connection, and be difficult to accurately analysis and evaluation related device kinetic characteristic and on the impact of electrical network. In addition, the problems such as device reliability, adaptability checking difficulty and operational management difficulty are big are also brought.
Summary of the invention
For the problems referred to above, the present invention proposes a kind of electric power system fault Union Switch Device model implementation method and system thereof, it is possible to realize the accurate simulation of dissimilar fault Union Switch Device action behavior various in power system and control characteristic.
A kind of electric power system fault Union Switch Device model implementation method, comprises the following steps:
According to generators in power systems on-off mode, treatment situation, and the throwing of circuit, transformer stops state, it is determined that when the operation scheme of plant stand residing for prior fault Union Switch Device;
The state of the whole power system of iterative;
Relevant analog quantity and quantity of state is obtained from the bus of the corresponding plant stand of power system or branch road etc.;
Differentiate current bus or branch road whether fault according to described analog quantity and quantity of state, if fault, differentiate the fault type of current bus or branch road;
The trend shelves position of section belonging to fault type according to fault element, affiliated plant stand operation scheme, fault element, Query Database, obtains corresponding measure of control in database, by the measure of control action information of correspondence insertion event queue;
Wherein, differentiate that the step of the fault type of current bus or branch road comprises:
If bypass elements detects that sudden change amount starts, and have a phase current to increase and phase voltage reduction, detect again that this branch road has two-phase to disconnect subsequently, and the time difference that two-phase disconnects is greater than reclosure time, then discriminating fault types is single-phase permanent fault;
If it is dynamic that bypass elements detects that sudden change measures, and only have a phase current to increase, only have a phase voltage to reduce, detect again that at least two-phase disconnects subsequently, and the time difference that two-phase disconnects is less than reclosure time, then discriminating fault types is that unidirectional fault jumps three-phase;
If bypass elements detects that sudden change amount starts, and have at least two phase currents to increase, have at least two-phase voltage to reduce, detect again that two-phase disconnects subsequently, and the time difference that two-phase disconnects is less than reclosure time, then discriminating fault types is two-phase short trouble;
If any branch road sudden change amount that bus connects starts, and detect that the circuit that this bus connects, apart from bus 0% place, open circuit occurs, detect again that all bus three-phases disconnect subsequently, and the positive sequence voltage of bus is less than 50%UN, then discriminating fault types is bus fault;
If arbitrary branch road sudden change amount that bus bar elements detection connects starts, and determined single-phase permanent fault, unidirectional fault jumping three-phase, two-phase short trouble or bus fault and existed, and time delay also has electric current in 0.5 second after fault, then discriminating fault types is breaker failure.
A kind of electric power system fault Union Switch Device model realization system, comprising:
Operation scheme detection module, for according to generators in power systems on-off mode, treatment situation, and the throwing of circuit, transformer stops state, it is determined that when the operation scheme of plant stand residing for prior fault Union Switch Device;
Iteration module, for the state of the whole power system of iterative;
Parameter acquisition module, for obtaining relevant analog quantity and quantity of state from the bus of the corresponding plant stand of power system or branch road etc.;
Breakdown judge module, for differentiating current bus or branch road whether fault according to described analog quantity and quantity of state, if fault, differentiates the fault type of current bus or branch road;
Control module, for the trend shelves position of section belonging to the fault type according to fault element, affiliated plant stand operation scheme, fault element, Query Database, obtains corresponding measure of control in database, by the measure of control action information of correspondence insertion event queue;
Wherein, described breakdown judge module comprises:
If detecting that sudden change amount starts for bypass elements, and have a phase current increase, a phase voltage to reduce, detect again that this branch road has two-phase to disconnect subsequently, and the time difference that two-phase disconnects is greater than reclosure time, then discriminating fault types is the module of single-phase permanent fault;
If it is dynamic to detect that sudden change measures for bypass elements, and only have a phase current to increase, and only have a phase voltage to reduce, detect again that at least two-phase disconnects subsequently, and the time difference that two-phase disconnects is less than reclosure time, then discriminating fault types is the module that unidirectional fault jumps three-phase;
If detecting that sudden change amount starts for bypass elements, and have at least two phase currents to increase, have at least two-phase voltage to reduce, detect again that two-phase disconnects subsequently, and the time difference that two-phase disconnects is less than reclosure time, then discriminating fault types is the module of two-phase short trouble;
If any branch road sudden change amount connected for bus starts, and detect that the circuit that this bus connects, apart from bus 0% place, open circuit occurs, detect again that all bus three-phases disconnect subsequently, and the positive sequence voltage of bus is less than 50%UN, then discriminating fault types is the module of bus fault;
If the arbitrary branch road sudden change amount connected for bus bar elements detection starts, and determined single-phase permanent fault, unidirectional fault jumping three-phase, two-phase short trouble or bus fault and existed, and time delay also has electric current in 0.5 second after fault, then discriminating fault types is the module of breaker failure.
The electric power system fault Union Switch Device model implementation method of the present invention and system thereof, adopt the control strategy of fault Union Switch Device by automatically differentiating electric network fault type, identify power system operation mode, differentiate section tidal current shelves position and perform corresponding measure of control four levels, it is achieved to the accurate simulation of dissimilar fault Union Switch Device action behavior various in power system and control characteristic. Overcome the shortcoming that conventional simulation software can not reflect fault Union Switch Device kinetic characteristic, can realize correctly being simulated by different faults Union Switch Device various in practical power systems, analysis afterwards that is complicated and serious accident can be carried out, for Safety Operation Analysis and the decision-making offer of electrical network provides powerful support for, decrease operation of power networks simultaneously and analyze personnel's computational effort, solve the problem of device reliability, adaptability checking difficulty.
Accompanying drawing explanation
Fig. 1 is electric power system fault Union Switch Device model implementation method schematic diagram of the present invention;
Fig. 2 uses the electric power system fault Union Switch Device model implementation method of the embodiment of the present invention to the schematic diagram of control strategy modeling;
Fig. 3 be the embodiment of the present invention electric power system fault Union Switch Device model implementation method in section definition schematic diagram;
Fig. 4 is the schema of the electric power system fault Union Switch Device model implementation method of the embodiment of the present invention;
Fig. 5 is the mechanism show intention of electric power system fault Union Switch Device model realization system of the present invention.
Embodiment
Referring to Fig. 1, Fig. 1 is electric power system fault Union Switch Device model implementation method schematic diagram of the present invention.
Described electric power system fault Union Switch Device model implementation method, comprises the following steps:
S101, according to generators in power systems on-off mode, treatment situation, and the throwing of circuit, transformer stops state, it is determined that when the operation scheme of plant stand residing for prior fault Union Switch Device;
S102, the state of the whole power system of iterative;
S103, obtains relevant analog quantity and quantity of state from the bus of the corresponding plant stand of power system or branch road etc.;
S104, differentiates current bus or branch road whether fault according to described analog quantity and quantity of state, if fault, differentiates the fault type of current bus or branch road;
S105, the trend shelves position of section belonging to the fault type of fault element, affiliated plant stand operation scheme, fault element, Query Database, obtains corresponding measure of control in database, by the measure of control action information of correspondence insertion event queue.
The electric power system fault Union Switch Device model implementation method of the present invention, adopt the control strategy of fault Union Switch Device by automatically differentiating electric network fault type, identify power system operation mode, differentiate section tidal current shelves position and perform corresponding measure of control four levels, it is achieved to the accurate simulation of dissimilar fault Union Switch Device action behavior various in power system and control characteristic. Overcome the shortcoming that conventional simulation software can not reflect fault Union Switch Device kinetic characteristic, can realize correctly being simulated by different faults Union Switch Device various in practical power systems, analysis afterwards that is complicated and serious accident can be carried out, for Safety Operation Analysis and the decision-making offer of electrical network provides powerful support for, decrease operation of power networks simultaneously and analyze personnel's computational effort, solve the problem of device reliability, adaptability checking difficulty.
In order to adapt to strong points, steering logic is complicated, Policy Table's scale the is big feature of fault Union Switch Device in practical power systems, the present invention is to electric network fault situation W, power system operation mode X, section tidal current shelves position Y and corresponding measure of control Z set up corresponding model, thus realize its control strategy modeling. That is: N=f (W, X, Y, Z), wherein, W represents electric network fault situation, and X represents operating parameter, and Y represents section shelves position, and Z represents corresponding measure of control set, and N represents the set of control strategy. As shown in Figure 2.
For step S101, operation scheme differentiates according to the generator output in generator number of units and initial flow data, and the equipment such as circuit, transformer and string benefit put into operation or the structural parameter such as inspecting state determine current system running status, thus and in control strategy corresponding running status numbering map.
For step S102 and step S103, section tidal current shelves position is determined. Each fault Union Switch Device is installed station at it may correspond to multiple section, and each section is made up of some branch roads. Section defines see Fig. 3. Section power is the algebraic sum of comprised branch power, and wherein end is pointed to from the top of branch road in the direction of branch power. If the current trend numerical value of section is between the section power upper limit defined and lower limit, also namely section tidal current is in this grade of position, and the strategy of this grade of position correspondence comes into force accordingly.
A preferred implementation, for step S104, differentiate that the step of the fault type of current bus or branch road can comprise:
If bypass elements detects that sudden change amount starts, and have a phase current increase, a phase voltage to reduce, detect again that this branch road has two-phase to disconnect subsequently, and the time difference that two-phase disconnects is greater than reclosure time, then discriminating fault types is single-phase permanent fault;
If it is dynamic that bypass elements detects that sudden change measures, and only have a phase current to increase, only have a phase voltage to reduce, detect again that at least two-phase disconnects subsequently, and the time difference that two-phase disconnects is less than reclosure time, then discriminating fault types is that unidirectional fault jumps three-phase;
If bypass elements detects that sudden change amount starts, and have at least two phase currents to increase, have at least two-phase voltage to reduce, detect again that two-phase disconnects subsequently, and the time difference that two-phase disconnects is less than reclosure time, then discriminating fault types is two-phase short trouble;
If any branch road sudden change amount that bus connects starts, and detect that the circuit that this bus connects, apart from bus 0% place, open circuit occurs, detect again that all bus three-phases disconnect subsequently, and the positive sequence voltage of bus is less than 50%UN, then discriminating fault types is bus fault;
If arbitrary branch road sudden change amount that bus bar elements detection connects starts, and determined single-phase permanent fault, unidirectional fault jumping three-phase, two-phase short trouble or bus fault and existed, and time delay also has electric current in 0.5 second after fault, then discriminating fault types is breaker failure.
Calculate each step-length analog quantity and quantity of state by aforesaid operations in real time according to analogue system, differentiate all by monitoring branch road and bus nodes whether fault and fault type. Can accurately judge that the single-phase permanent fault of branch road, single-phase fault jump three-phase, two-phase short trouble, bus fault, breaker failure.
For step S105, described measure of control comprise the machine of cutting, cutting load, the excision appointment operation such as circuit, transformer.
A preferred implementation, for step S105, the trend shelves position of section belonging to the fault type of fault element, affiliated plant stand operation scheme, fault element, Query Database, the step obtaining corresponding measure of control in database comprises:
Described database sets each generator priority orders under different faults type in advance and cuts metering;
After judging the fault type of described fault element, search the priority orders of corresponding generator according to described fault type and cut metering, according to described priority orders with cut metering and carry out cutting machine.
Described machine priority of cutting can perform by the priority that following table defines:
Wherein, priority is that sequence is exited in 0 expression, and priority is that the 1 preferential rank of expression is the highest. Machine of cutting in measure of control and must be cut machine order and blocked correspondence. If current section power is greater than cuts gate sill, the machine amount of cutting then equals to cut gate sill and subtracts and cut machine base value, in order to guarantee system stability, it is necessary to above-mentioned machine amount of cutting is multiplied by a coefficient again, and this coefficient is more than or equal to 1.0, cuts and confidential meet minimum mistake and cut.
A preferred implementation, for step S105, the trend shelves position of section belonging to the fault type of fault element, affiliated plant stand operation scheme, fault element, Query Database, the step obtaining corresponding measure of control in database also comprises:
The ratio under being set in advance in various fault type in described database, load excised;
After judging the fault type of described fault element, searching the ratio of corresponding load excision according to described fault type, the ratio excised according to described load carries out cutting load.
Preferably, the above-mentioned ratio searching corresponding load excision according to described fault type, the step that the ratio excised according to described load carries out cutting load comprises:
Under certain fault type, obtaining load i according to following formulae discovery needs resection:
Pi=PL* (can cut ratio i* allocation proportion i)/((ratio 1* allocation proportion 1 can be cut)+(ratio 2* allocation proportion 2 can be cut)+...+(ratio m* allocation proportion m can be cut))
Wherein, Pi is that load i needs resection, and PL needs cutting load total amount, m be participate in the distribution calculate meet sum, the described ratio of cutting is 0.0 to 1.0, is less than 0, is forced to 0, is greater than 1.0, then be forced to 1.0.
Cutting load proportional distribution can carry out distribution in the ratio that following table defines and perform:
Also it is exactly under certain fault type, the calculating if the total each load of m is participated in the distribution, wherein load i need resection according to following formula PL* (ratio i* allocation proportion i can be cut)/((ratio 1* allocation proportion 1 can be cut)+(ratio 2* allocation proportion 2 can be cut)+...+(ratio i* allocation proportion i can be cut)+...), wherein, PL needs cutting load total amount. Can the ratio of cutting be 0.0��1.0, entirely be cut to 1.0. It is less than 0, it is forced to 0, be greater than 1.0, be then forced to 1.0. If current section power is greater than cutting load threshold, cutting load amount then equals cutting load threshold and subtracts cutting load base value, in order to guarantee system stability, it is necessary to above-mentioned cutting load amount is multiplied by a coefficient again, and this coefficient is more than or equal to 1.0, and cutting load to be met minimum mistake and cut. Cutting load total amount on each load node must not exceed actual load. If exist can the not enough problem of the amount of cutting, will excise by actual maximum load.
After obtaining corresponding measure of control, control strategy can be carried out modeling, adopt the modeling method of above steps, the present invention can set up control scheme list intuitively, can according to fault type recognition > operation scheme differentiates > section tidal current shelves position > step of measure of control carries out control strategy search. When the grid collapses, the all branch roads of simulated program autoscan or bus, when determining a certain branch road or certain fault occurs bus, then according to the strategy under current operation scheme search corresponding manner residing for this station, and shelves position residing for actual profile trend selects the control strategy under this grade of position to realize corresponding controlling functions.
The electric power system fault Union Switch Device model implementation method of the present invention is described below in a specific embodiment.
Referring to Fig. 4, Fig. 4 is the schema of the electric power system fault Union Switch Device model implementation method of the embodiment of the present invention.
The electric power system fault Union Switch Device model implementation method of the present embodiment comprises the following steps:
Step 101: arrange T=0 computing time, starts simulation calculation;
Step 102: relevant electric network composition parameter, dynamic element parameter and fault Union Switch Device definite value are carried out initialize;
Step 103: stop state etc. according to the throwing of the start-up mode of relevant generator, situation of exerting oneself and circuit, transformer and determine the operation scheme when plant stand residing for prior fault Union Switch Device;
Step 104: the state of the whole power system of iterative;
Step 105: fault Union Switch Device model obtains relevant amount from the bus of corresponding plant stand, branch road etc.;
Step 106: control strategy cut by scanning fault connection;
Step 107: differentiate current bus or branch road whether fault, if fault, perform step 108, otherwise, perform step 111;
Step 108: the fault type differentiating current bus or branch road;
Step 109: the trend shelves position of section belonging to fault element fault type, affiliated plant stand operation scheme, fault element, inquiry obtains corresponding measure of control.
Step 110: measure of control action information corresponding for current element is inserted in event queue;
Step 111: differentiate whether the whole network all faults Union Switch Device is all scanned, if scanned, performs step 113, otherwise, perform step 112;
Step 112: index next fault Union Switch Device in electrical network, and repeated execution of steps 105 to step 111;
Step 113: differentiate and occur with or without event, if had, performs step 114, otherwise performs step 116;
Step 114: admittance battle array and the Jacobian matrix again forming whole power system;
Step 115: simultaneous solution event triggers the system state in moment;
Step 116: differentiate and whether arrived computing time, if time is up, terminate, otherwise repeated execution of steps 104 to step 115.
Step 117: computing time arrives, then this calculating of whole model terminates.
The present invention adopts that fault type identifies automatically, operation scheme and section tidal current mate automatically, thus realize the search of corresponding control strategy, set up corresponding control strategy model, achieve and different faults Union Switch Device various in practical power systems is correctly simulated, can be used for analysis afterwards that is complicated and serious accident, for Safety Operation Analysis and the decision-making offer of electrical network provides powerful support for.
Referring to Fig. 5, Fig. 5 is the mechanism show intention of electric power system fault Union Switch Device model realization system of the present invention.
Described electric power system fault Union Switch Device model realization system, comprising:
Operation scheme detection module 11, for according to generators in power systems on-off mode, treatment situation, and the throwing of circuit, transformer stops state, it is determined that when the operation scheme of plant stand residing for prior fault Union Switch Device;
Iteration module 12, for the state of the whole power system of iterative;
Parameter acquisition module 13, for obtaining relevant analog quantity and quantity of state from the bus of the corresponding plant stand of power system or branch road etc.;
Breakdown judge module 14, for differentiating current bus or branch road whether fault according to described analog quantity and quantity of state, if fault, differentiates the fault type of current bus or branch road;
Control module 15, for the trend shelves position of section belonging to the fault type according to fault element, affiliated plant stand operation scheme, fault element, Query Database, obtains corresponding measure of control in database, by the measure of control action information of correspondence insertion event queue.
Adopt the control strategy of fault Union Switch Device by automatically differentiating electric network fault type, identify power system operation mode, differentiate section tidal current shelves position and perform corresponding measure of control four levels, it is achieved to the accurate simulation of dissimilar fault Union Switch Device action behavior various in power system and control characteristic. Overcome the shortcoming that conventional simulation software can not reflect fault Union Switch Device kinetic characteristic, can realize correctly being simulated by different faults Union Switch Device various in practical power systems, analysis afterwards that is complicated and serious accident can be carried out, for Safety Operation Analysis and the decision-making offer of electrical network provides powerful support for, decrease operation of power networks simultaneously and analyze personnel's computational effort, solve the problem of device reliability, adaptability checking difficulty.
In one embodiment, described breakdown judge module comprises:
If detecting that sudden change amount starts for bypass elements, and have a phase current increase, a phase voltage to reduce, detect again that this branch road has two-phase to disconnect subsequently, and the time difference that two-phase disconnects is greater than reclosure time, then discriminating fault types is the module of single-phase permanent fault;
If it is dynamic to detect that sudden change measures for bypass elements, and only have a phase current to increase, only there is a phase voltage to reduce, detect again that at least two-phase disconnects subsequently, and the time difference that two-phase disconnects is less than reclosure time, then discriminating fault types is the module that unidirectional fault jumps three-phase;
If detecting that sudden change amount starts for bypass elements, and have at least two phase currents to increase, have at least two-phase voltage to reduce, detect again that two-phase disconnects subsequently, and the time difference that two-phase disconnects is less than reclosure time, then discriminating fault types is the module of two-phase short trouble;
If any branch road sudden change amount connected for bus starts, and detect that the circuit that this bus connects, apart from bus 0% place, open circuit occurs, detect again that all bus three-phases disconnect subsequently, and the positive sequence voltage of bus is less than 50%UN, then discriminating fault types is the module of bus fault;
If the arbitrary branch road sudden change amount connected for bus bar elements detection starts, and determined single-phase permanent fault, unidirectional fault jumping three-phase, two-phase short trouble or bus fault and existed, and time delay also has electric current in 0.5 second after fault, then discriminating fault types is the module of breaker failure.
In one embodiment, described control module comprises: cut machine control module, for setting the priority orders of each generator under different faults type in the database in advance and cut metering; After judging the fault type of described fault element, searching the priority orders of corresponding generator according to described fault type and cut metering, according to described priority orders, metering carries out cutting machine operation with cutting.
In one embodiment, described control module comprises: cutting load control module, for being set in advance under various fault type in the database to the ratio of load excision; After judging the fault type of described fault element, searching the ratio of corresponding load excision according to described fault type, the ratio excised according to described load carries out cutting load.
Further, described cutting load control module is under certain fault type, and obtaining load i according to following formulae discovery needs resection:
Pi=PL* (can cut ratio i* allocation proportion i)/((ratio 1* allocation proportion 1 can be cut)+(ratio 2* allocation proportion 2 can be cut)+...+(ratio m* allocation proportion m can be cut))
Wherein, Pi is that load i needs resection, and PL needs cutting load total amount, m be participate in the distribution calculate meet sum, the described ratio of cutting is 0.0 to 1.0, is less than 0, is forced to 0, is greater than 1.0, then be forced to 1.0.
One of ordinary skill in the art will appreciate that the system of all or part of flow process and the correspondence realized in above-mentioned enforcement mode, it is can be completed by the hardware that computer program carrys out instruction relevant, described program can be stored in a computer read/write memory medium, this program, when performing, can comprise the flow process such as the respective embodiments described above. Wherein, described storage media can be magnetic disc, CD, read-only storage memory body (Read-OnlyMemory, ROM) or random storage and remembers body (RandomAccessMemory, RAM) etc.
The above embodiment only have expressed several enforcement modes of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to patent scope of the present invention. , it is also possible to make some distortion and improvement, it should be appreciated that for the person of ordinary skill of the art, without departing from the inventive concept of the premise these all belong to protection scope of the present invention. Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (8)
1. an electric power system fault Union Switch Device model implementation method, it is characterised in that, comprise the following steps:
According to generators in power systems on-off mode, treatment situation, and the throwing of circuit, transformer stops state, it is determined that when the operation scheme of plant stand residing for prior fault Union Switch Device;
The state of the whole power system of iterative;
Relevant analog quantity and quantity of state is obtained from the bus of the corresponding plant stand of power system or branch road;
Differentiate current bus or branch road whether fault according to described analog quantity and quantity of state, if fault, differentiate the fault type of current bus or branch road;
The trend shelves position of section belonging to fault type according to fault element, affiliated plant stand operation scheme and fault element, Query Database, obtains corresponding measure of control in database, by the measure of control action information of correspondence insertion event queue;
Wherein, differentiate that the step of the fault type of current bus or branch road comprises:
If bypass elements detects that sudden change amount starts, and have a phase current to increase and phase voltage reduction, detect again that this branch road has two-phase to disconnect subsequently, and the time difference that two-phase disconnects is greater than reclosure time, then discriminating fault types is single-phase permanent fault;
If it is dynamic that bypass elements detects that sudden change measures, and only have a phase current to increase, only have a phase voltage to reduce, detect again that at least two-phase disconnects subsequently, and the time difference that two-phase disconnects is less than reclosure time, then discriminating fault types is that unidirectional fault jumps three-phase;
If bypass elements detects that sudden change amount starts, and have at least two phase currents to increase, have at least two-phase voltage to reduce, detect again that two-phase disconnects subsequently, and the time difference that two-phase disconnects is less than reclosure time, then discriminating fault types is two-phase short trouble;
If any branch road sudden change amount that bus connects starts, and detect that the circuit that this bus connects, apart from bus 0% place, open circuit occurs, detect again that all bus three-phases disconnect subsequently, and the positive sequence voltage of bus is less than 50%UN, then discriminating fault types is bus fault;
If arbitrary branch road sudden change amount that bus bar elements detection connects starts, and determined single-phase permanent fault, unidirectional fault jumping three-phase, two-phase short trouble or bus fault and existed, and time delay also has electric current in 0.5 second after fault, then discriminating fault types is breaker failure.
2. electric power system fault Union Switch Device model implementation method as claimed in claim 1, it is characterized in that, the trend shelves position of section belonging to fault type according to fault element, affiliated plant stand operation scheme and fault element, Query Database, the step obtaining corresponding measure of control in database comprises:
Described database sets each generator priority orders under different faults type in advance and cuts metering;
After judging the fault type of described fault element, search the priority orders of corresponding generator according to described fault type and cut metering, according to described priority orders with cut metering and carry out cutting machine.
3. electric power system fault Union Switch Device model implementation method as described in claim 1 to 2 any one, it is characterized in that, the trend shelves position of section belonging to fault type according to fault element, affiliated plant stand operation scheme and fault element, Query Database, the step obtaining corresponding measure of control in database comprises:
The ratio under being set in advance in various fault type in described database, load excised;
After judging the fault type of described fault element, searching the ratio of corresponding load excision according to described fault type, the ratio excised according to described load carries out cutting load.
4. electric power system fault Union Switch Device model implementation method as claimed in claim 3, it is characterised in that, the ratio of corresponding load excision is searched according to described fault type, the step that the ratio excised according to described load carries out cutting load comprises:
Under certain fault type, obtaining load i according to following formulae discovery needs resection:
Pi=PL* (can cut ratio i* allocation proportion i)/((ratio 1* allocation proportion 1 can be cut)+(ratio 2* allocation proportion 2 can be cut)+...+(ratio m* allocation proportion m can be cut))
Wherein, Pi is that load i needs resection, and PL needs cutting load total amount, m be participate in the distribution calculate meet sum, the described ratio of cutting is 0.0 to 1.0, when the described ratio of cutting is less than 0, is forced to 0, when the described ratio of cutting is greater than 1.0, is then forced to 1.0.
5. an electric power system fault Union Switch Device model realization system, it is characterised in that, comprising:
Operation scheme detection module, for according to generators in power systems on-off mode, treatment situation, and the throwing of circuit, transformer stops state, it is determined that when the operation scheme of plant stand residing for prior fault Union Switch Device;
Iteration module, for the state of the whole power system of iterative;
Parameter acquisition module, for obtaining relevant analog quantity and quantity of state from the bus of the corresponding plant stand of power system or branch road;
Breakdown judge module, for differentiating current bus or branch road whether fault according to described analog quantity and quantity of state, if fault, differentiates the fault type of current bus or branch road;
Control module, for the trend shelves position of section belonging to the fault type according to fault element, affiliated plant stand operation scheme and fault element, Query Database, obtains corresponding measure of control in database, by the measure of control action information of correspondence insertion event queue;
Wherein, described breakdown judge module comprises:
If detecting that sudden change amount starts for bypass elements, and have a phase current increase, a phase voltage to reduce, detect again that this branch road has two-phase to disconnect subsequently, and the time difference that two-phase disconnects is greater than reclosure time, then discriminating fault types is the module of single-phase permanent fault;
If it is dynamic to detect that sudden change measures for bypass elements, and only have a phase current to increase, and only have a phase voltage to reduce, detect again that at least two-phase disconnects subsequently, and the time difference that two-phase disconnects is less than reclosure time, then discriminating fault types is the module that unidirectional fault jumps three-phase;
If detecting that sudden change amount starts for bypass elements, and have at least two phase currents to increase, have at least two-phase voltage to reduce, detect again that two-phase disconnects subsequently, and the time difference that two-phase disconnects is less than reclosure time, then discriminating fault types is the module of two-phase short trouble;
If any branch road sudden change amount connected for bus starts, and detect that the circuit that this bus connects, apart from bus 0% place, open circuit occurs, detect again that all bus three-phases disconnect subsequently, and the positive sequence voltage of bus is less than 50%UN, then discriminating fault types is the module of bus fault;
If the arbitrary branch road sudden change amount connected for bus bar elements detection starts, and determined single-phase permanent fault, unidirectional fault jumping three-phase, two-phase short trouble or bus fault and existed, and time delay also has electric current in 0.5 second after fault, then discriminating fault types is the module of breaker failure.
6. electric power system fault Union Switch Device model realization system as claimed in claim 5, it is characterized in that, described control module comprises: cut machine control module, for setting the priority orders of each generator under different faults type in the database in advance and cut metering; After judging the fault type of described fault element, searching the priority orders of corresponding generator according to described fault type and cut metering, according to described priority orders, metering carries out cutting machine operation with cutting.
7. electric power system fault Union Switch Device model realization system as described in claim 5 to 6 any one, it is characterized in that, described control module comprises: cutting load control module, for being set in advance under various fault type in the database to the ratio of load excision; After judging the fault type of described fault element, searching the ratio of corresponding load excision according to described fault type, the ratio excised according to described load carries out cutting load.
8. electric power system fault Union Switch Device model realization system as claimed in claim 7, it is characterised in that, described cutting load control module is under certain fault type, and obtaining load i according to following formulae discovery needs resection:
Pi=PL* (can cut ratio i* allocation proportion i)/((ratio 1* allocation proportion 1 can be cut)+(ratio 2* allocation proportion 2 can be cut)+...+(ratio m* allocation proportion m can be cut))
Wherein, Pi is that load i needs resection, and PL needs cutting load total amount, m be participate in the distribution calculate meet sum, the described ratio of cutting is 0.0 to 1.0, when the described ratio of cutting is less than 0, is forced to 0, when the described ratio of cutting is greater than 1.0, is then forced to 1.0.
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| CN107546749A (en) * | 2017-09-04 | 2018-01-05 | 中国电力科学研究院 | A kind of peace control after direct current locking failure cuts machine measure amount and calculates method and system |
| CN107728008A (en) * | 2017-11-28 | 2018-02-23 | 天津浩源慧能科技有限公司 | A kind of electric network fault detection method |
| CN111190358B (en) * | 2020-02-26 | 2023-03-14 | 国网河南省电力公司电力科学研究院 | 10kV closing angle control system and accurate control method |
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