CN103956750B - Wind-powered electricity generation is concentrated and is sent the idle work optimization system and method controlling voltage pulsation under pattern - Google Patents
Wind-powered electricity generation is concentrated and is sent the idle work optimization system and method controlling voltage pulsation under pattern Download PDFInfo
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Abstract
The invention belongs to technical field of new energy power generation, particularly relate to a kind of wind-powered electricity generation concentration and send the idle work optimization system and method controlling voltage pulsation under pattern.It includes that data real-time collecting system, wind energy turbine set each control unit control module, voltage pulsation optimal control module, reactive-load compensation optimal allocation module, control instruction are assigned interface and perform module, data response feedback control module, idle and voltage sensitivity analysis module, Digsilent computing module, Voltage Cortrol configuration module and data response feedback control module.The present invention uses the dynamic reactive equipping rules with voltage as target that wind energy turbine set can be instructed to concentrate the dynamic reactive equipping rules sending outside under pattern, can solve the most serious wind energy turbine set concentration and send the problem that brought voltage pulsation is bigger, when sending for concentrating, during centralized compensation, idle work optimization provides one computational methods accurately and reliably.The raising safety of Operation of Electric Systems, economy are significant.
Description
Technical field
The invention belongs to technical field of new energy power generation, particularly relate to a kind of wind-powered electricity generation concentration and send control voltage pulsation under pattern
Idle work optimization system and method, particularly to a kind of consider wind energy turbine set access after voltage ripple of power network control idle work optimization side
Method.Control of Voltage at different levels to wind energy turbine set, analyze grid-connected point voltage level in real time, use the consideration voltage wave with inventive concept
Dynamic idle work optimization method, it is achieved the optimization controlling electrical network dynamic passive compensation, to safe, the warp that improve Operation of Electric Systems
Ji property is significant.
Background technology
The energy and environmental problem become the two big important topics that the world today is faced.The crisis that caused by energy problem and day by day
Prominent environmental problem, the reproducible new forms of energy making people recognize that exploitation is cleaned are to preserve the ecological environment and protect sustainable development
The desirability of exhibition.Hydroelectric generation in renewable and clean energy resource, floods and immigration problem, equally owing to there is substantial amounts of soil
There is environmental issue, nuclear energy power generation is owing to its cost is too high and serious threat to environment is also subject to certain restrictions, and wind-force
Generating, although currently industry size is little compared with conventional thermoelectricity energy generating, one-time investment is big, is technology in generation of electricity by new energy
Exploit condition the most ripe, on the largest scale and the generation mode of Commercial Prospect.Greatly develop wind-powered electricity generation, protection Chinese Energy Safety and
Atmospheric environment becomes the focus that people at present pay close attention to most.China is the rich and influential family of energy resource consumption.For a long time, due to energy shortage system
The about development of industrial or agricultural.The main power source of electrical network remains thermal power generation at present.Substantial amounts of thermal power generation is not only short by fuel
The restriction lacked, and limited by traffic condition.From long-range strategy, develop wind energy resources, as conventional energy resource
The supplementary energy is the most necessary.
Wind-powered electricity generation has intermittent as power supply and is difficult to the characteristic dispatched, and large-scale wind power field is accessed electrical network and may be pacified power system
Full stable operation and the quality of power supply have adverse effect on.Along with more, bigger wind energy turbine set puts into operation, the skill of wind-electricity integration
Art problem also can be more and more prominent.In order to promote the sound development of wind-powered electricity generation, it is ensured that the reliable grid connection of Large Scale Wind Farm Integration is run, and having must
To study from the stability contorting of the voltage pulsation in the angle of electrical network area abundant to wind energy resources.
Summary of the invention
The present invention is directed to above-mentioned problems of the prior art, it is provided that a kind of wind-powered electricity generation is concentrated and sent control voltage pulsation under pattern
Idle work optimization system and method concentrate that to send brought voltage pulsation bigger in order to solve the most serious wind energy turbine set
Problem, when sending for concentrating, during centralized compensation, idle work optimization provides a kind of computational methods.And the method meets the biggest rule
The inexorable trend of dynamic reactive centralized compensation under mould access module.
For achieving the above object, the technical solution adopted for the present invention to solve the technical problems is:
Wind-powered electricity generation is concentrated and is sent the idle work optimization system controlling voltage pulsation under pattern, each including data real-time collecting system, wind energy turbine set
Control unit control module, voltage pulsation optimal control module, reactive-load compensation optimal allocation module, control instruction assign interface and
Perform module, data response feedback control module, idle and voltage sensitivity analysis module, Digsilent computing module, electricity
Pressure adjusts configuration module and data response feedback control module.
Described real time data acquisition module is by sharing data with the data monitoring system of wind energy turbine set, and is capable of Rendezvous Point
Real-time data acquisition, this system should be able to accept the AVC control instruction of traffic department and by this instruction by Reactive power control mould
Block performs realization.
Described wind energy turbine set each control unit control module connects control wind energy turbine set power of the assembling unit control system, wind energy turbine set master control system
And dynamic passive compensation apparatus control system；Control module has been required to interface and has connected and accept instruction.
The reactive-load compensation optimal allocation module capacity of described wind energy turbine set comprises two parts and forms: i.e. dynamic passive compensation and static nothing
Merit compensation capacity, sets up the reactive power/voltage control module controlling to adjust at any time, and this module can be selected to send out to greatest extent
Wave the static reactive power compensation scheme of dynamic reactive capacity, be not the most continuously adjustable, therefore due to static reactive power compensation
Now needing voltage & var control module to select optimum static reactive configuration, the target of static reactive optimum is to adjust voltage pulsation
Required minimum dynamic reactive is target；The model of the dynamic reactive optimal allocation of foundation consideration voltage pulsation:
Described control instruction is assigned interface and performs module, it is possible to realizes controlling the idle capacity of Wind turbines, controls wind
The input of electric field reactive-load compensation equipment, controls the control strategy of dynamic reactive compensation device.
Wind-powered electricity generation is concentrated and is sent the idle work optimization method controlling voltage pulsation under pattern, comprises the steps:
Step 1: gather Rendezvous Point and access the real-time running data of wind energy turbine set；
Step 2: gather the real-time traffic information of each control unit of wind energy turbine set；
Step 3: wind energy turbine set real time execution number and wind power prediction data are inputted Digsilent computing module by interface, and
Reading electrical network parameter data from scheduling D5000 system in real time, calculating may wind energy turbine set merit in being currently configured lower following a period of time
Rate changes the peak to peak caused, and magnitude of a voltage fluctuation is returned to reactive power and voltage control system；
Step 4: voltage optimization control system can be according to the voltage control curve scope of dispatching down distributing for controlling target, it is judged that current
Whether voltage runs in the control reference voltage of dispatching down distributing, and as the constraints of idle work optimization；
Step 5: the output of all control units, by holding quantitative limitation, therefore sets the capacity constraints of each control unit；
Step 6: each step voltage in addition to grid-connected point voltage all in the constraints operating to each step voltage within normal range；
Step 7: using the adjustment amplitude of idle configuration as a class constraints；
Step 8: using the equipment open and close times on the same day as constraints；
Step 9: construct idle configuration initializaing variable, initializes population, and by interface channel transmission to computing module, calculates electricity
Pressure fluctuation change, in region, the change of each busbar voltage fluctuation is as the ideal adaptation angle value of population, constraints is made simultaneously
For individual restricted type fitness value；
Step 10: use genetic algorithm to carry out cross and variation and produce colony of a new generation, it is judged that the fitness value of new population, retain
Optimum history is individual in population of future generation, and after n iteration, the configuration result that output ideal adaptation degree is optimum, according to joining
Put result output allocation plan.Allocation plan after reactive Voltage Optimum is converted into the most each reactive power/voltage control under control instruction
Unit；
Step 11: extract, by data response feedback control system, the response value controlled from measured data and enter with target
Row comparison, carries out the feedback control of system eliminating deviation for target.And assign the most each reactive power/voltage control list under control instruction
Unit, reactive Voltage Optimum process terminates.
Described idle configuration initializaing variable is expressed as follows:
Object function is stated:
Idle units limits:
Each node voltage retrains:
Vimin≤Vi≤Vimax(3)；
Equipment open and close times limits:
Nsimin≤Nsi≤Nsimax(4)；
In formula: Δ UbdRepresent magnitude of a voltage fluctuation, QdtminRepresent dynamic passive compensation to exert oneself lower limit, QdtmaxRepresent dynamic reactive
Compensation is exerted oneself the upper limit；QcminRepresent static reactive power compensation to exert oneself lower limit, QcmaxRepresent static reactive power compensation to exert oneself the upper limit；QfjminGeneration
Table Wind turbines reactive-load compensation is exerted oneself lower limit, QfjmaxRepresent Wind turbines reactive-load compensation to exert oneself the upper limit；ViminRepresent this node voltage
Lower limit, VimaxRepresent this node voltage higher limit；NsiminRepresent equipment open and close times lower limit, NsimaxThe equipment of representative cut-offs
Number of times higher limit.
The voltage range that described grid-connected point voltage constraint is assigned according to scheduling sets, and each step voltage is according to each step voltage required standard
Formulating, set end voltage needs value preserving Wind turbines properly functioning.
Beneficial effects of the present invention and advantage be:
1. improve the voltage pulsation that wind-powered electricity generation large-scale grid connection brings and improve the wind-electricity integration quality of power supply.
2. this system can the maximum idle fan-out capability playing whole wind energy turbine set, reduce the waste caused due to configuration conflict.
3. use the dynamic reactive equipping rules with voltage as target that wind energy turbine set can be instructed to concentrate the dynamic reactive sent outside under pattern to join
Put principle.
The present invention calculated by the fluctuation of dynamic electric voltage that output of wind electric field is caused needed for optimum dynamic passive compensation capacity, calculate
Dynamic reactive capacity and blower fan are exerted oneself capacity, static capacitors pool-size of the idle configuration of wind energy turbine set is taken into consideration, dynamically adjusts
Controlling target, the present invention meets the inexorable trend of dynamic reactive centralized compensation under the most extensive access module, can solve day by day
Serious wind energy turbine set is concentrated and is sent the problem that brought voltage pulsation is bigger, and when sending for concentrating, during centralized compensation, idle work optimization carries
One computational methods are accurately and reliably supplied.Control of Voltage at different levels to wind energy turbine set, real-time analysis node voltage levvl, employing has
The idle work optimization method considering voltage pulsation of inventive concept, it is achieved the optimization controlling electrical network dynamic passive compensation, to raising
The safety of Operation of Electric Systems, economy are significant.
The present invention is applicable to many wind energy turbine set and collects Rendezvous Point control system when sending outside, and the wind energy turbine set access scale now that adapts to more is come
The biggest trend, has a good application prospect.
Accompanying drawing explanation
Fig. 1 is the Reactive power control internal system schematic flow sheet of the present invention；
Fig. 2 is that the system of the present invention constitutes schematic diagram.
Detailed description of the invention
The present invention is that a kind of wind-powered electricity generation concentration sends the idle work optimization system and method controlling voltage pulsation under pattern.
As it is shown in figure 1, wind-powered electricity generation of the present invention is concentrated sends the idle work optimization system controlling voltage pulsation under pattern, real-time including data
Acquisition system, wind energy turbine set each control unit control module, voltage pulsation optimal control module, reactive-load compensation optimal allocation module,
Control instruction assign interface and perform module, data response feedback control module, idle analyze with voltage sensitivity module,
Digsilent computing module, Voltage Cortrol configuration module and data response feedback control module.
Described data real-time collecting system is by sharing data with the data monitoring system of wind energy turbine set, and is capable of Rendezvous Point
Real-time data acquisition.This system should be able to accept the AVC control instruction of traffic department and by this instruction by Reactive power control system
System performs realization.
Described wind energy turbine set each control unit control module connect control wind energy turbine set power of the assembling unit control system, wind energy turbine set master control system and
Dynamic passive compensation apparatus control system.Control system has been required to interface and has connected and accept instruction.
As in figure 2 it is shown, be the reactive voltage control system pie graph of present invention entirety, idle the setting of each electric pressure of Multistage Control
For exerting oneself, thus reaching to control the purpose of whole stability of voltage of wind power plant, the voltage that this system can make wind energy turbine set maintenance higher is steady
Qualitative wind-powered electricity generation is concentrated and is sent the optimal reactive power allocation method controlled based on voltage pulsation under pattern, installs idle electricity in wind energy turbine set master control
Pressure control system, reactive voltage control system is set up within collecting station, with each wind energy turbine set control system of wind turbines and master control system
It is connected, obtains service data in real time, and control instruction can be sent in time, and can accept to dispatch the voltage control curve assigned.
After wind energy turbine set assigns control instruction, start to include following rate-determining steps:
Step 1: gather Rendezvous Point and access the real-time running data of wind energy turbine set；
Step 2: gather the real-time traffic information of each control unit of wind energy turbine set；
Step 3: wind energy turbine set real time execution number and wind power prediction data are inputted Digsilent computing module by interface, and
Reading electrical network parameter data from scheduling D5000 system in real time, calculating may wind energy turbine set merit in being currently configured lower following a period of time
Rate changes the peak to peak caused, and magnitude of a voltage fluctuation is returned to reactive power and voltage control system.
Step 4: voltage optimization control system can be according to the voltage control curve scope of dispatching down distributing for controlling target, it is judged that current
Whether voltage runs in the control reference voltage of dispatching down distributing, and as the constraints of idle work optimization.
Step 5: the output of all control units, by holding quantitative limitation, therefore sets the capacity constraints of each control unit.
Step 6: each step voltage in addition to grid-connected point voltage all in the constraints operating to each step voltage within normal range.
Step 7: using the adjustment amplitude of idle configuration as a class constraints.
Step 8: using the equipment open and close times on the same day as constraints.
Step 9: construct idle configuration initializaing variable, initializes population, and by interface channel transmission to computing module, calculates electricity
Pressure fluctuation change, in region, the change of each busbar voltage fluctuation is as the ideal adaptation angle value of population, constraints is made simultaneously
For individual restricted type fitness value.The described configuration calculating certain time period calculates and can set according to on-site actual situations,
Described idle configuration initializaing variable is expressed as follows:
Object function is stated:
Idle units limits:
Each node voltage retrains
Vimin≤Vi≤Vimax(3)
Equipment open and close times limits:
Nsimin≤Nsi≤Nsimax(4)
In formula: Δ UbdRepresent magnitude of a voltage fluctuation, QdtminRepresent dynamic passive compensation to exert oneself lower limit, QdtmaxRepresent dynamic reactive
Compensation is exerted oneself the upper limit；QcminRepresent static reactive power compensation to exert oneself lower limit, QcmaxRepresent static reactive power compensation to exert oneself the upper limit；QfjminGeneration
Table Wind turbines reactive-load compensation is exerted oneself lower limit, QfjmaxRepresent Wind turbines reactive-load compensation to exert oneself the upper limit.ViminRepresent this node voltage
Lower limit, VimaxRepresent this node voltage higher limit.NsiminRepresent Wind turbines reactive-load compensation to exert oneself the upper limit.
The voltage range that the constraint of described grid-connected point voltage is assigned according to scheduling sets, and each step voltage is according to each step voltage required standard system
Fixed, set end voltage needs value preserving Wind turbines properly functioning.During calculating, each step voltage can leave certain nargin.
The undulated control module of described voltage is followed the requirement of power system relevant regulations and is determined that concentration sends voltage pulsation control under pattern
Scope processed:It should be noted that the enforcement of this technological invention exists specific precondition, i.e. there are the big rule of wind energy turbine set
Mould is concentrated and is accessed, and after reaching to a certain degree due to wind energy turbine set capacity, the change of exerting oneself of wind energy turbine set access point just can cause voltage relatively
Great fluctuation process, according to such a principle, provides the implementation condition of the present invention i.e.: the voltage pulsation caused of wind energy turbine setIf being unsatisfactory for this and requiring, the capacity of dynamic passive compensation does not limit in voltage pulsation, and therefore this is dynamic
Idle configuration is the expansion for current wind energy turbine set scale, in the case of multiple wind energy turbine set are collected, individually mends the inside of wind energy turbine set
Repay the needs that can not meet System Reactive Power voltage, need Rendezvous Point is carried out centralized compensation, and now need to consider on a large scale
System voltage fluctuation problem after access configures dynamic reactive capacity.
The reactive-load compensation optimal allocation module capacity of described wind energy turbine set comprises two parts composition, i.e. dynamic passive compensation and static nothing
Merit compensation capacity, sets up the reactive voltage control system controlling to adjust at any time, and this system can be selected to send out to greatest extent
Wave the static reactive power compensation scheme of dynamic reactive capacity, be not the most continuously adjustable, therefore due to static reactive power compensation
Now needing voltage powerless control system to select optimum static reactive configuration, the target of static reactive optimum is to adjust voltage pulsation
Required minimum dynamic reactive is target.Set up the model of the dynamic reactive optimal allocation considering voltage pulsation.
Described powerless control system need to be capable of controlling the idle capacity of Wind turbines, controls Reactive Compensation in Wind Farm and sets
Standby input, controls the control strategy of dynamic reactive compensation device.
Described dynamic reactive target control voltage pulsation is target, and usual dynamic passive compensation equipment control strategy all uses perseverance
Therefore voltage or the control mode of constant power factor, if needing the voltage that wind energy turbine set is collected access point to be controlled needing to calculate
One target voltage values
Voltage pulsation should be controlled in the range of the Ua centered by target voltage ± Δ U φ/2 by described dynamic reactive voltage,
Realizing this target needs the reactive voltage control system of a real-time adjustment to realize.
Step 10: use genetic algorithm to carry out cross and variation and produce colony of a new generation, it is judged that the fitness value of new population, retain
Optimum history is individual in population of future generation, and after n iteration, the configuration result that output ideal adaptation degree is optimum, according to joining
Put result output allocation plan.Allocation plan after reactive Voltage Optimum is converted into the most each reactive power/voltage control under control instruction
Unit.
Step 11: extract, by data response feedback control system, the response value controlled from measured data and enter with target
Row comparison, carries out the feedback control of system eliminating deviation for target.And assign the most each reactive power/voltage control list under control instruction
Unit, reactive Voltage Optimum process terminates.
To making full use of of the idle configuration of whole wind energy turbine set, be built upon to and site voltage pulsation control on the basis of realize
, the specific aim of this programme is stronger, it is adaptable to Net Frame of Electric Network is weak, the overall system control that wind energy turbine set accesses on a large scale, passes through
After allotment, the idle system of wind energy turbine set can provide preferable voltage support ability for system.
The present invention is as a example by Liaoning Faku County dragon health wind energy turbine set.
Gather the real-time running data that Long Kang becomes and accesses eight wind energy turbine set；Gather Long Kang to become and eight each control units of wind energy turbine set
Real-time traffic information；In Digsilent calculates, set up model, and according to electrical network parameter, set up bulk power grid model.Target electricity
Pressure is 1.04pu., according to according to State Grid Corporation of China's file " State Grid Corporation of China's power system voltage quality and var pipe
Reason regulation " Article 7 power plant and the regulation of substation bus bar day voltage fluctuation rate permissible value: 220 kilovolts of power plant bus and 500
Pressure busbar voltage in kilovolt (330 kilovolts) transformer station: 3.5%；Control reference voltage 1.0575pu.～1.0225pu., and count
Calculate the OPTIMAL REACTIVE POWER configuration that Long Kang becomes under possible configuration.Result of calculation is as shown in table 1.
Can be seen that the OPTIMAL REACTIVE POWER that Long Kang becomes is configured to Capacitor banks and puts into two groups, dynamic passive compensation range of capacity is from perception
37MVar is to capacitive 22MVar.Perform this configuration can effectively control the voltage pulsation of Long Kang change in the range of 3.5%
Run.
Table 1 Long Kang becomes dynamic passive compensation demand when exerting oneself change
Claims (3)
1. wind-powered electricity generation is concentrated and is sent the idle work optimization system controlling voltage pulsation under pattern, it is characterised in that: include real time data acquisition
System, wind energy turbine set each control unit control module, voltage pulsation optimal control module, reactive-load compensation optimal allocation module, control
Instruction issuing interface and execution module, data response feedback control module, idle and voltage sensitivity analysis module, Digsilent
Computing module and Voltage Cortrol configuration module；
Described data real-time collecting system is by sharing data with the data monitoring system of wind energy turbine set, and is capable of Rendezvous Point
Real-time data acquisition, this system should be able to accept the AVC control instruction of traffic department and by this instruction by Reactive power control mould
Block performs realization；
Described wind energy turbine set each control unit control module connects control wind energy turbine set power of the assembling unit control system, wind energy turbine set master control system
And dynamic passive compensation apparatus control system；Wind energy turbine set each control unit control module has been required to interface and has connected and accept instruction；
The reactive-load compensation optimal allocation module capacity of described wind energy turbine set comprises two parts and forms: i.e. dynamic passive compensation and static nothing
Merit compensation capacity, sets up the reactive power/voltage control module controlling to adjust at any time, and this module can be selected to send out to greatest extent
Wave the static reactive power compensation scheme of dynamic reactive capacity, be not the most continuously adjustable, therefore due to static reactive power compensation
Now needing reactive power/voltage control module to select optimum static reactive configuration, the target of static reactive optimum is to adjust voltage pulsation
Required minimum dynamic reactive is target；Set up the model of the dynamic reactive optimal allocation considering voltage pulsation；
Described control instruction is assigned interface and performs module, it is possible to realizes controlling the idle capacity of Wind turbines, controls wind
The input of electric field reactive-load compensation equipment, controls the control strategy of dynamic reactive compensation device；
Utilize wind-powered electricity generation to concentrate the optimization method sending the idle work optimization system controlling voltage pulsation under pattern, comprise the steps:
Step 1: gather Rendezvous Point and access the real-time running data of wind energy turbine set；
Step 2: gather the real-time traffic information of each control unit of wind energy turbine set；
Step 3: wind energy turbine set real-time running data and wind power prediction data are inputted Digsilent computing module by interface, and
Reading electrical network parameter data from scheduling D5000 system in real time, calculating may wind energy turbine set merit in being currently configured lower following a period of time
Rate changes the peak to peak caused, and magnitude of a voltage fluctuation is returned to reactive power and voltage control system；
Step 4: reactive power and voltage control system can be sentenced according to the voltage control curve scope of dispatching down distributing for controlling target
Whether disconnected current voltage runs in the control reference voltage of dispatching down distributing, and as the constraints of idle work optimization；
Step 5: the output of all control units, by holding quantitative limitation, therefore sets the capacity constraints of each control unit；
Step 6: each step voltage all operates to the constraints of each step voltage in addition to grid-connected point voltage within normal range；
Step 7: using the adjustment amplitude of idle configuration as a class constraints；
Step 8: using the equipment open and close times on the same day as constraints；
Step 9: construct idle configuration initializaing variable, initializes population, and by interface channel transmission to computing module, calculates electricity
Pressure fluctuation change, in region, the change of each busbar voltage fluctuation is as the ideal adaptation angle value of population, constraints is made simultaneously
For individual restricted type fitness value；
Step 10: use genetic algorithm to carry out cross and variation and produce a new generation population, it is judged that the fitness value of new population, retain
Optimum history is individual in population of future generation, and after n iteration, the configuration result that output ideal adaptation degree is optimum, according to joining
Put result output allocation plan；Allocation plan after reactive Voltage Optimum is converted into the most each reactive power/voltage control under control instruction
Unit；
Step 11: extract, by data response feedback control system, the response value controlled from measured data and enter with target
Row comparison, carries out the feedback control of system eliminating deviation for target；And assign control instruction to each reactive power/voltage control unit,
Reactive Voltage Optimum process terminates.
Wind-powered electricity generation the most according to claim 1 is concentrated and is sent the idle work optimization system controlling voltage pulsation under pattern, and its feature exists
In: described idle configuration initializaing variable is expressed as follows:
Object function is stated:
Idle units limits:
Each node voltage retrains:
Vi min≤Vi≤Vi max(3)；
Equipment open and close times limits:
Nsi min≤Nsi≤Nsi max(4)；
In formula: Δ UbdRepresent magnitude of a voltage fluctuation, Qdt minRepresent dynamic passive compensation to exert oneself lower limit, Qdt maxRepresent dynamic reactive
Compensation is exerted oneself the upper limit；Qc minRepresent static reactive power compensation to exert oneself lower limit, Qc maxRepresent static reactive power compensation to exert oneself the upper limit；Qfj minGeneration
Table Wind turbines reactive-load compensation is exerted oneself lower limit, Qfj maxRepresent Wind turbines reactive-load compensation to exert oneself the upper limit；Vi minRepresent this node voltage
Lower limit, Vi maxRepresent this node voltage higher limit；Nsi minRepresent equipment open and close times lower limit, NsimaxThe equipment of representative cut-offs
Number of times higher limit.
Wind-powered electricity generation the most according to claim 1 is concentrated and is sent the idle work optimization system controlling voltage pulsation under pattern, and its feature exists
In: the voltage range that the constraints of described grid-connected point voltage is assigned according to scheduling sets, and each step voltage is advised according to each step voltage
Determining standard formulation, set end voltage needs value preserving Wind turbines properly functioning.
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| CN104135013A (en) * | 2014-08-20 | 2014-11-05 | 武汉大学 | Wind-power-integration-responded electrical power system reactive voltage hierarchical control method |
| CN104158195A (en) * | 2014-08-27 | 2014-11-19 | 国家电网公司 | Multi-target voltage optimizing method of wind power plant cluster |
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