CN103904667A - Quick and stable control method adopted after island independent grid power generation equipment failure - Google Patents
Quick and stable control method adopted after island independent grid power generation equipment failure Download PDFInfo
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
Abstract
The invention discloses a quick and stable control method adopted after island independent grid power generation equipment failure. According to the difference in operation features of power generation equipment, the power generation equipment is divided into three types, and the dynamic stable control mode after failure switching is preset according to the type of the failure power generation equipment; the corresponding dynamic stable control mode after failure switching is executed according to the received type of the failure power generation equipment; after the failure is eliminated, the execution of the corresponding dynamic stable control mode is canceled according to a received failure elimination signal. According to the method, based on wide-area data uploaded by a wide-area measurement unit, power vacancy caused by the exiting of the power generation equipment is calculated when the power generation equipment failure occurs, power imbalance of a system is eliminated instantly through storage energy regulation or load control after failure switching so that the system can be recovered to the stable operation state before the failure occurs, power balance is realized quickly after the island grid failure, and the stability of the fragile island grid system is improved.
Description
Technical field
The present invention relates to the fast and stable control method after the independence grid generation equipment fault of a kind of island.
Background technology
Away from the island electric power system in continent, be one independently send out, join, the network of electricity consumption one, owing to there is no the support of large electrical network, system is relatively fragile.Except conventional rotary generator, the island electrical network distributed power source that also existence form is various, performance is different and a large amount of electronic power inverter generating equipment of disperseing.The diesel engine generator that uses in the electrical network of island, small water conservancy generator, micro-gas turbine generator, wind-driven generator, photovoltaic power generation equipment, energy storage etc. can be divided three classes according to controlling feature.One class is that conventional rotary electrification equipment is as diesel engine generator, small water conservancy generator etc., such generator is synchronous or asynchronous generator, when operation, automatically regulate and have idle output to fluctuate with load-responsive, and can maintain the stable of set end voltage, this class generating equipment can independent operating be stably also load power supply.Equations of The Second Kind is to support independent operating control model and the power electronics generating equipment of the pattern that is incorporated into the power networks simultaneously, as micro-gas turbine, fuel cell, energy storage etc., such generating equipment under independent operation mode (VF control model) for system provides stable voltage and frequency, it is the PV node of system, when the pattern of being incorporated into the power networks (PQ control model), accept setting, take set power as target output, be the PQ node of system, two kinds of control models can be switched mutually.The 3rd class for by the grid-connected Novel generating equipment of the electronic power inversion equipment of single control model (PQ control model) as wind-driven generator, photovoltaic power generation equipment etc., electronic power inversion equipment without spin element only can be by DC inversion for exchanging, its power stage is usually determined by the size of primary energy, and it is irrelevant with payload, therefore this class generating equipment usually can not can not take on system master power supply by independent operating, must access to have and can load-responsive can be incorporated into the power networks in the electrical network of generating equipment composition of demand, the PQ node that this kind equipment is system.
Simultaneously, in the electrical network of island, the load responding velocity contrast of each distributed power source is very large, from Millisecond (as photovoltaic generation, fuel cell, electrical energy storage unit), second level (as miniature gas turbine, mechanical energy storage unit) to a minute level (as wind power generation) not etc.In addition because power system capacity is little, poor anti jamming capability, after generation generating equipment fault, system may be collapsed because instantaneous power vacancy is excessive.All these characteristics have more increased the difficulty of island power grid operation, therefore need more intelligent, initiatively, efficiently, the island power grid control system of networking, solve dynamic stability and the stable state energy balance problem of large disturbance.
Summary of the invention
The object of this invention is to provide the fast and stable control method after the independence grid generation equipment fault of a kind of island, to solve island independence electrical network dynamic stability problem after generating equipment failure removal.
In order to realize above object, the technical solution adopted in the present invention is: the fast and stable control method after the independence grid generation equipment fault of a kind of island, comprises the steps:
(1) according to the difference of generating equipment operation characteristic, generating equipment is divided into the two control model electronic power inverter generating equipments of rotary electrification equipment, PQ mode power electronic inverter generating equipment and PQ/VF, and works out in advance the Dynamic Stability Control pattern after failover according to fault generating equipment type;
(2) carry out the Dynamic Stability Control pattern after corresponding failover according to the type of the generating equipment breaking down receiving;
(3) after Failure elimination, according to the execution of the corresponding Dynamic Stability Control pattern of failure removal signal cancellation receiving.
If there are many rotary electrification equipment paired running generatings in the network system of island, in the time that a rotary electrification equipment fault is exited, after failover, the Dynamic Stability Control process of system is as follows:
A, calculate the stand-by heat generate output of all the other grid-connected rotary electrification equipment, in the time that reserve capacity is enough large, not needing to carry out any measure system just can stable operation;
B, be not enough to make up power when disappearance when reserve generation capacity, check whether the two control model electronic power inverter generating equipments of PQ/VF have the ability to bear remainder power shortage, if can, increase the two control model electronic power inverter generating equipments of PQ/VF and exert oneself;
If the two control model electronic power inverter generating equipments of C PQ/VF can not bucking-out system power shortage, whether check system there is rotary electrification equipment for subsequent use, if had, the rotary electrification equipment for subsequent use of generate output before can starting capacity being greater than fault generating equipment and breaking down;
If after the above-mentioned all control measure of D are carried out, still there is Partial Power vacancy in system, can only realize power-balance by excising corresponding load.
In described step B, in the time checking whether the two control model electronic power inverter generating equipments of PQ/VF have the ability to bear remainder power shortage, whether have the ability to bear remainder power shortage residual capacity SOC and discharge power by checking the two control model electronic power inverter generating equipments of PQ/VF, in the time that SOC is less than the least residue capacity of permission or discharge power and has approached maximum discharge power, illustrate that it no longer has regulating power.
In described step D, while realizing power-balance by excising corresponding load, first excise non-important load, then excise important load, and according to power shortage size brake load excision plan.
If only have a rotary electrification equipment in the electrical network of island as the generating of system master power grid, if this rotary electrification equipment is incorporated into the power networks while breaking down, after failover, the Dynamic Stability Control process of system is as follows:
I, exert oneself while being less than for subsequent use the exerting oneself of the two control model electronic power inverter generating equipments of PQ/VF that can take on master control power supply when this rotary electrification equipment before fault, switching immediately the two control model electronic power inverter generating equipments of this PQ/VF is master control power supply;
II, exert oneself while being greater than the maximum output of the two control model electronic power inverter generating equipments of PQ/VF that can take on master control power supply when this rotary electrification equipment before fault, now can only start rotary electrification equipment for subsequent use.
In the time that the power electronics generating equipment of the two control models of PQ/VF before fault is non-master control power supply, identical with PQ mode power electronic inverter generating equipment Fault Control pattern, its Dynamic Stability Control process is as follows:
1. the stand-by heat capacity that is less than current master control power supply when its power shortage of bringing to system while exiting of breaking down, system is without doing any control, and power shortage will be born by master control power supply completely;
If 2. power shortage is greater than the tolerance range of current master control power supply, and master control power supply is rotary electrification equipment, must all the other controlled electronic power inverter generating equipments of quick adjustment exert oneself, if there is no adjustable generating equipment, should excise unnecessary load immediately;
If 3. before fault, system master power supply is the power electronics generating equipment of the two control models of PQ/VF, after it breaks down, need to start rotary electrification equipment for subsequent use as system master power supply, after the power electronics generating equipment reset fault of the two control models of PQ/VF, participate in the adjusting of power with PQ pattern.
In the time that the power electronics generating equipment of the two control models of PQ/VF before fault is master control power supply, after it breaks down, need to start rotary electrification equipment for subsequent use as system master power supply, after the power electronics generating equipment reset fault of the two control models of PQ/VF, participate in the adjusting of power with PQ pattern.
In startup rotary electrification device procedures for subsequent use, each electronic power inverter generating equipment is out of service by isolated island, and system power vacancy is all load electricity consumption total amounts, now first judges whether rotary electrification equipment rated capacity for subsequent use is greater than this power shortage; In the time that rotary electrification equipment generating rated capacity for subsequent use is less than power shortage, first cut-out load, recovers to drop into cut load after generating until each power electronics generating equipment out of service again.
Fast and stable control method after the independence grid generation equipment fault of island of the present invention, based on the wide-area data of sending on wide area measurement unit, in the time there is generating equipment fault, calculate because generating equipment exits the power shortage (imbalance power) causing, after failover immediately or adjust energy storage or control load to eliminate the unbalanced power of system, make system can get back to fast the steady operational status before fault, realize fast the power-balance after the electric network fault of island, improve fragile island network system stability.
Accompanying drawing explanation
Fig. 1 is system construction drawing of the present invention;
Fig. 2 is the data interaction flow chart of island concentrated protection device and island network stability control device in the present invention;
Fig. 3 is the dynamic control flow chart of generating equipment fault when many rotary generator paired runnings in the present invention;
Fig. 4 is the dynamic control flow chart of generating equipment fault when separate unit rotary generator moves in the present invention;
Fig. 5 is two dynamic control flow charts of control model inverter generating equipment fault in the present invention;
Fig. 6 is the Dynamic Stability Control flow chart after electronic power inverter generating equipment fault in the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention is described further.
Be illustrated in figure 1 the system construction drawing of Transient Stability Control after fault of the present invention; as shown in the figure; this system is divided into key-course and central control level on the spot; wherein acquisition terminal, energy storage PCS, photovoltaic DC-to-AC converter, blower fan inverter etc. are synchronous phasor measurement unit PMU; undertake and gather wide area measurement data, with 200 frame/second frequency transmit data by rapid communication net toward main website (island electrical network concentrated protection device, island electric network fault stability controller).The collecting terminal adopting in the present invention send wide area measurement data on can be directly, gather circuit breaker position and on send local fault message; Same energy storage PCS, photovoltaic DC-to-AC converter, the blower fan inverter of supporting IEC61850-9-2+GOOSE agreement can be accepted the control command such as start and stop, power stage that main website layer issues.
Central control level comprises island electrical network concentrated protection device and island electric network fault stability controller.Island electrical network concentrated protection device completes that Fault Identification, fault are notified, Fault Isolation, troubleshooting end notification etc., and its handling process is as accompanying drawing 2.The present invention processes the Dynamic Stability Control flow process after generating equipment fault in the electric network fault stability controller of island; only relate to island electric network fault stability controller and receive the notices such as the generation of concentrated protection plant failure, faulty equipment, troubleshooting finish, island electrical network concentrated protection principle is not set forth.
When short trouble occurs, island electrical network concentrated protection device is notified the facility information breaking down; during the isolated fault of concentrated protection device; island network stability control device is worked out control strategy in advance according to short-circuit device type; in the time receiving troubleshooting and finish, carry out at once the control model of pre-formulation; if fault because reclosing disappears, does not carry out carrying out with the control of decision-making.
Due to the difference of generating equipment electricity generating principle, in the time breaking down, be also different on the impact of system, therefore the present invention divides rotary electrification equipment fault, the double mode power electronics generating equipment of PQ/VF fault, PQ mode power electronics generating equipment fault to carry out difference analysis.
Fast and stable control method after the independence grid generation equipment fault of island of the present invention comprises the steps:
(1) according to the difference of generating equipment operation characteristic, generating equipment is divided into the two control model electronic power inverter generating equipments of rotary electrification equipment, PQ mode power electronic inverter generating equipment and PQ/VF, and works out in advance the Dynamic Stability Control pattern after failover according to fault generating equipment type;
(2) carry out the Dynamic Stability Control pattern after corresponding failover according to the type of the generating equipment breaking down receiving;
(3) after Failure elimination, according to the execution of the corresponding Dynamic Stability Control pattern of failure removal signal cancellation receiving.
1. the Dynamic Stability Control after rotary electrification equipment fault
1) many rotary generator paired runnings
In the time there is the rotary electrification equipment being incorporated into the power networks in system, rotary electrification equipment is system master power supply, maintains the stable of system frequency and voltage.If there are many rotary electrification equipment paired running generatings in the network system of island, in the time that a rotary electrification equipment fault is exited, as shown in Figure 3, the two control model electronic power inverter generating equipments of PQ/VF of the present embodiment refer generally to energy storage PCS, rotary electrification equipment and rotary electrification equipment for subsequent use refer generally to generator, and after its failover, the Dynamic Stability Control process of system is as follows:
A, calculate the stand-by heat generate output of all the other grid-connected rotary generators, in the time that reserve capacity is enough large, not needing to carry out any measure system just can stable operation;
B, be not enough to make up power when disappearance when reserve generation capacity, check whether energy storage PCS has the ability to bear remainder power shortage and (check energy storage residual capacity SOC and discharge power simultaneously, in the time that SOC is less than the least residue capacity of permission or discharge power and has approached maximum discharge power, illustrate that energy storage no longer has regulating power), if can, increase energy storage PCS and exert oneself;
If C energy storage PCS can not bucking-out system power shortage, whether check system there is rotary generator for subsequent use, if had, and the rotary generator for subsequent use of generate output before can starting capacity being greater than fault generator and breaking down;
If after the above-mentioned all control measure of D are carried out, still there is Partial Power vacancy in system, can only realize power-balance by excising corresponding load.While calculating the least load that needs excision, first excise non-important load, then excise important load, and according to power shortage size brake load excision plan.
System by above control measure after, because system still maintains the stable of system by rotary generator, now system is not carried out master control electrical source exchange.
2) separate unit rotary generator is incorporated into the power networks
When rotary generator breaks down while exiting, not only system moment will exist and the big or small identical power shortage of exerting oneself before this generator failure, and system also likely loses the support of master control power supply.If there are not other master control power supplys after rotary electrification equipment fault, need to carry out the switching of master control power supply, even start the control model of rotary generator for subsequent use or the double mode power electronics generating equipment of switching PQ/VF, the rapid black of realizing system starts.
If only have a rotary electrification equipment in the electrical network of island as the generating of system master power grid, only this rotary generator is basic generation unit, if this generator failure, after failure removal, system will have a power failure in short-term.Conventionally the reverse power generation device such as wind power generation, photovoltaic generation accessing in system possesses low voltage ride-through capability, in the time that the system dead electricity time is no more than low voltage crossing time limit 625ms, and inverter sustainable operation, otherwise inverter exits isolated island.In master control electrical source exchange, energy storage PCS control mode switch (now needing energy storage PCS is VF control model by the PQ control mode switch) time is very fast, be about 20ms, and it is slower to start rotary generator for subsequent use, needs cost 15s and above time.If realize mains supply by switching energy storage PCS control model after therefore rotating master control power failure, power-generation inversion device continuous service, will bring larger power shortage otherwise power-generation inversion device is out of service.
Can therefore, separate unit rotary generator be incorporated into the power networks while breaking down as shown in Figure 4, need, according to directly switching the power supply of energy storage control model recovery system, to work out network stability control flow process, and detailed process is as follows:
I, be less than for subsequent use the exerting oneself (now energy storage PCS has the ability to take on system master power supply) of the energy storage that can take on master control power supply when this generator output before fault, it is master control electric source modes that stability controller switches energy storage PCS immediately, this process is short switching time, each reverse power generation device is through low voltage crossing continued power, and system will recovery system power supply within the millisecond time.
II, in the time that before fault, this generator output is greater than the maximum output of the energy storage that can take on master control power supply, now can only start rotary generator for subsequent use.Because rotary generator startup is slower, each electronic power inverter generating equipment is out of service by isolated island during this period, and system power vacancy is all load electricity consumption total amounts, now first judges whether rotary generator rated capacity for subsequent use is greater than this power shortage.In the time that rotary generator rated capacity for subsequent use is less than power shortage, must load by first cut-out for quick recovery system power supply, after recovering generating, generating equipment out of service drops into again cut load.
Dynamic Stability Control after the power electronics generating equipment fault of the two control models of 2.PQ/VF
The power electronics generating equipment of two control models mainly refers to the electronic power inverter generating equipment that can support VF control model and PQ control model, mainly comprise energy storage PCS, micro-gas turbine generation apparatus, fuel cell etc., wherein with stored energy application the most general (in the time considering the ability of exerting oneself of energy storage PCS, need consider the residual capacity restriction of energy storage) simultaneously.Such generating equipment maintains alone the stable of system frequency and voltage under VF control model, is system master power supply, and in the time of PQ control model, by specified power output, it exports the not fluctuation of load-responsive.Therefore when the Dynamic Stability Control strategy after the power electronics generating equipment fault of formulating two control models, needing to distinguish the control model of this energy storage device before fault, is that system master control equipment (VF control model) is also non-master control equipment (PQ control model).
1) Dynamic Stability Control while being non-master control power supply before fault
As shown in Figure 5, in the time that two control model inverters are system master power supply, rotary generators all in system is all out of service, and considers economic factor, and rotary generator is all in cold standby state, and this inverter will be born alone all fluctuations of system.In the time of system generation larger fluctuation due to inverter conveyance capacity a little less than, if when the impulse current of the inverter of flowing through exceedes the resistance to electric current of maximum of power electric component, inverter protection will be closed power stage, now system dead electricity immediately.Two control inverter body faults are such over current fault moment in most cases; therefore clearly not solving before this larger fluctuation, two control model inverters of restarting other still may cause new master control inverter that overcurrent protection also occurs as master control equipment.Therefore in order to guarantee the relative to electrical stability of system; after master control power inverter generation overcurrent protection fault, need to start rotary electrification equipment for subsequent use; allow rotary electrification equipment for subsequent use become system master generating equipment, after inverter reset fault, participate in the adjusting of power with PQ pattern.
Because rotary generator is longer start-up time, in its handoff procedure, power electronics generating equipment is by out of service, now all power supplys all log off, if still can not bear all loads after a maximum rotary generator starts, need first to excise a part of non-important load according to the size of fault preload, after rotary generator starts, along with generating electricity by way of merging two or more grid systems successively of power electronics generating equipment out of service, progressively recover cut load.
2) Dynamic Stability Control while being non-master control power supply before fault
When two control model invertor operations are during in PQ control model, this inverter is the non-master control generating equipment of system, and in the time of this device fails, if generated output is non-vanishing before this generating equipment fault, it exits and will bring certain power shortage to system.The method for making and subscribing of its control model is the same with PQ electronic power inverter generating equipment fault handling method.
Dynamic Stability Control after 3.PQ control model electronic power inverter generating equipment fault
This class is broken down while exiting and will be brought certain power shortage to system by the Novel generating equipment of electronic power inverter (as wind power plant, photovoltaic power generation equipment) connecting system, and as shown in Figure 6, its Dynamic Stability Control process is as follows:
1. the stand-by heat capacity that is less than current basic generation unit when power shortage, system is without doing any control, and power shortage will be born by master control power supply completely;
If 2. power shortage is greater than the tolerance range of current master control power supply, and basic generation unit is rotary generator, now system frequency, voltage all will sharply rise, must all the other power electronics generating equipments of exerting oneself controlled of quick adjustment exert oneself, if there is no adjustable generating equipment, should excise unnecessary load immediately;
If 3. before fault, system master control equipment is the electronic power inverter of two control models; the exiting of fault generating equipment may cause master control inverter owing to exerting oneself excessive and overcurrent protection immediately, the Dynamic Stability Control of its subsequent control after with two control model generating equipment faults.
Above embodiment is only for helping to understand core concept of the present invention; can not limit the present invention with this; for those skilled in the art; every foundation thought of the present invention; the present invention is modified or is equal to replacement; any change of doing in specific embodiments and applications, within all should being included in protection scope of the present invention.
Claims (8)
1. the fast and stable control method after the equipment fault of island independence grid generation, is characterized in that, comprises the steps:
(1) according to the difference of generating equipment operation characteristic, generating equipment is divided into the two control model electronic power inverter generating equipments of rotary electrification equipment, PQ mode power electronic inverter generating equipment and PQ/VF, and works out in advance the Dynamic Stability Control pattern after failover according to fault generating equipment type;
(2) carry out the Dynamic Stability Control pattern after corresponding failover according to the type of the generating equipment breaking down receiving;
(3) after Failure elimination, according to the execution of the corresponding Dynamic Stability Control pattern of failure removal signal cancellation receiving.
2. the fast and stable control method after the independence grid generation equipment fault of island according to claim 1, it is characterized in that: if there are many rotary electrification equipment paired running generatings in the network system of island, in the time that a rotary electrification equipment fault is exited, after failover, the Dynamic Stability Control process of system is as follows:
A, calculate the stand-by heat generate output of all the other grid-connected rotary electrification equipment, in the time that reserve capacity is enough large, not needing to carry out any measure system just can stable operation;
B, be not enough to make up power when disappearance when reserve generation capacity, check whether the two control model electronic power inverter generating equipments of PQ/VF have the ability to bear remainder power shortage, if can, increase the two control model electronic power inverter generating equipments of PQ/VF and exert oneself;
If the two control model electronic power inverter generating equipments of C PQ/VF can not bucking-out system power shortage, whether check system there is rotary electrification equipment for subsequent use, if had, the rotary electrification equipment for subsequent use of generate output before can starting capacity being greater than fault generating equipment and breaking down;
If after the above-mentioned all control measure of D are carried out, still there is Partial Power vacancy in system, can only realize power-balance by excising corresponding load.
3. the fast and stable control method after the independence grid generation equipment fault of island according to claim 2, it is characterized in that: in described step B, in the time checking whether the two control model electronic power inverter generating equipments of PQ/VF have the ability to bear remainder power shortage, whether have the ability to bear remainder power shortage residual capacity SOC and discharge power by checking the two control model electronic power inverter generating equipments of PQ/VF, in the time that SOC is less than the least residue capacity of permission or discharge power and has approached maximum discharge power, illustrate that it no longer has regulating power.
4. the fast and stable control method after the independence grid generation equipment fault of island according to claim 2, it is characterized in that: in described step D, while realizing power-balance by excising corresponding load, first excise non-important load, excise again important load, and according to power shortage size brake load excision plan.
5. the fast and stable control method after the independence grid generation equipment fault of island according to claim 1, it is characterized in that: if only there is a rotary electrification equipment to generate electricity as system master power grid in the electrical network of island, if this rotary electrification equipment is incorporated into the power networks while breaking down, after failover, the Dynamic Stability Control process of system is as follows:
I, exert oneself while being less than for subsequent use the exerting oneself of the two control model electronic power inverter generating equipments of PQ/VF that can take on master control power supply when this rotary electrification equipment before fault, switching immediately the two control model electronic power inverter generating equipments of this PQ/VF is master control power supply;
II, exert oneself while being greater than the maximum output of the two control model electronic power inverter generating equipments of PQ/VF that can take on master control power supply when this rotary electrification equipment before fault, now can only start rotary electrification equipment for subsequent use.
6. the fast and stable control method after the independence grid generation equipment fault of island according to claim 1, it is characterized in that: in the time that the power electronics generating equipment of the two control models of PQ/VF before fault is non-master control power supply, identical with PQ mode power electronic inverter generating equipment Fault Control pattern, its Dynamic Stability Control process is as follows:
1. the stand-by heat capacity that is less than current master control power supply when its power shortage of bringing to system while exiting of breaking down, system is without doing any control, and power shortage will be born by master control power supply completely;
If 2. power shortage is greater than the tolerance range of current master control power supply, and master control power supply is rotary electrification equipment, must all the other controlled electronic power inverter generating equipments of quick adjustment exert oneself, if there is no adjustable generating equipment, should excise unnecessary load immediately;
If 3. before fault, system master power supply is the power electronics generating equipment of the two control models of PQ/VF, after it breaks down, need to start rotary electrification equipment for subsequent use as system master power supply, after the power electronics generating equipment reset fault of the two control models of PQ/VF, participate in the adjusting of power with PQ pattern.
7. the fast and stable control method after the independence grid generation equipment fault of island according to claim 1, it is characterized in that: in the time that the power electronics generating equipment of the two control models of PQ/VF before fault is master control power supply, after it breaks down, need to start rotary electrification equipment for subsequent use as system master power supply, after the power electronics generating equipment reset fault of the two control models of PQ/VF, participate in the adjusting of power with PQ pattern.
8. according to the fast and stable control method after the island independence grid generation equipment fault described in claim 5～7 any one, it is characterized in that: in startup rotary electrification device procedures for subsequent use, each electronic power inverter generating equipment is out of service by isolated island, system power vacancy is all load electricity consumption total amounts, now first judges whether rotary electrification equipment rated capacity for subsequent use is greater than this power shortage; In the time that rotary electrification equipment generating rated capacity for subsequent use is less than power shortage, first cut-out load, recovers to drop into cut load after generating until each power electronics generating equipment out of service again.
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| CN106099986A (en) * | 2016-08-03 | 2016-11-09 | 中广核研究院有限公司 | A kind of isolated island comprehensive energy supply and safeguards system |
| CN107643687A (en) * | 2017-09-29 | 2018-01-30 | 广州供电局有限公司 | A kind of emergency control method of industrial park integrated energy system |
| CN110224407A (en) * | 2019-06-20 | 2019-09-10 | 国网湖南省电力有限公司 | Cutting load method based on line power Load flow calculation |
| CN111199317A (en) * | 2020-01-02 | 2020-05-26 | 合肥阳光新能源科技有限公司 | Emergency energy scheduling method, system and equipment for virtual power plant |
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| CN111199317B (en) * | 2020-01-02 | 2023-09-29 | 阳光新能源开发股份有限公司 | Emergency energy scheduling method, system and equipment for virtual power plant |
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