CN103515972A - Wind power plant system with energy storage system adopted and control method thereof - Google Patents
Wind power plant system with energy storage system adopted and control method thereof Download PDFInfo
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Abstract
The invention provides a wind power plant system with an energy storage system adopted and a control method thereof. The wind power plant system with the energy storage system adopted comprises a wind turbine generator system, a wind power plant monitoring system, the energy storage system, an energy storage monitoring system and a combined control system, wherein the combined control system is connected with a power grid, the wind power plant monitoring system and the energy storage monitoring system, and the combined control system is used for reading the working state of the wind turbine generator system and the working state of the energy storage system through the wind power plant monitoring system and the energy storage monitoring system and controlling the energy storage system to store or release electric energy through the energy storage monitoring system according to power supply scheduling commands, the working state of the wind turbine generator system and the working state of the energy storage system to compensate output power of the wind turbine generator system so that output power at a rendezvous point can meet requirements of power supply power of the power grid. Therefore, power, input into the power grid, of the wind turbine generator system is smoother, and requirements of the state for grid connection are met. The embodiment of the invention further provides the novel control method of the wind power plant system.
Description
Technical field
The present invention relates to wind generating technology, relate in particular to a kind of wind turbine field system and control method thereof of applying energy-storage system.
Background technology
Wind energy, as a kind of regenerative resource of clean environment firendly, is more and more subject to global attention, simultaneously, wind energy is also a kind of unsettled energy, the speed of natural wind and direction are change at random, how to make the stable output power of wind-driven generator, are important topics of wind generating technology.
In recent years, the grid connected wind power technology of China develops rapidly, Fig. 1 is prior art apoplexy group of motors topological structure schematic diagram, as shown in Figure 1, wind farm monitoring system 101 is for monitoring wind turbine cohort 102(Wind Turbine Generator System, WTGS) electric energy performance, as voltage, electric current, power output etc., and controls wind turbine cohort 102, by confluence 103, power delivery is arrived to electrical network 104.But the power of wind-powered electricity generation unit is subject to the impact of wind speed very large.The randomness of wind energy and the intermittent fluctuation that causes wind turbine cohort 102 power outputs, cause wind turbine cohort 102 self to be difficult to provide stable electric energy output to electrical network 104, thereby easily cause the problems such as electrical network 104 voltages and power fluctuation, simultaneously, when wind turbine generator power output is greater than the actual power load of electrical network, abandon wind phenomenon, cause power coefficient lower.Simultaneously again because the fluctuation of wind turbine cohort 102 power outputs, so wind turbine cohort 102 can bring reactive power/voltage control and power quality problem, so just wind power system is had higher requirement, for example, to the frequency modulation of electrical network 104, peak regulation, and the specification requirement of electrical network 104 long distance power deliveries increasing, the while has also been reduced the direct utilance of electric energy.
Summary of the invention
The present invention, for solving the short-term fluctuation problem of existing blower fan generating power output, improves the quality of power supply and grid-connected stability, and a kind of wind turbine field system is provided.
A kind of wind turbine field system that the embodiment of the present invention provides, comprising: wind turbine cohort, wind farm monitoring system, energy-storage system, energy storage monitor system and combined control system;
The input of described energy-storage system is connected to the output of described wind turbine cohort, for storing the electric energy of described wind turbine cohort; The output of the output of described energy-storage system and described wind turbine cohort is connected to electrical network by confluence, for being jointly described mains supply;
Described wind farm monitoring system connects described wind turbine cohort, for monitoring the operating state of described wind turbine cohort; Described energy storage monitor system connects described energy-storage system, for monitoring the operating state of described energy-storage system;
Described combined control system connects described electrical network, wind farm monitoring system and energy storage monitor system, the load dispatching instruction sending for reading described electrical network, read the operating state of wind turbine cohort and the operating state of energy-storage system, and determine by described energy storage monitor system and control described energy-storage system storage or discharge electric energy according to described load dispatching instruction, the operating state of wind turbine cohort and the operating state of energy-storage system, to compensate the power output of described wind turbine cohort, make the power output at described convergent point place meet the output power of described electrical network.
As technique scheme preferably, described combined control system comprises:
The first read module, is connected with described electrical network, the load dispatching instruction sending for reading described electrical network;
The second read module, is connected with described wind farm monitoring system, for reading the operating state of described wind turbine cohort;
Third reading delivery piece, is connected with described energy storage monitor system, for reading the operating state of described energy-storage system;
Control module, according to described load dispatching instruction, the operating state of wind turbine cohort and the operating state of energy-storage system, determine by described energy storage monitor system and control described energy-storage system storage or discharge electric energy, to compensate the power output of described wind turbine cohort, make the power output at described convergent point place meet the output power of described electrical network.
As technique scheme preferably, described wind turbine field system also comprises: wind energy power prediction module, be connected with described combined control system, described wind energy power prediction module is used for predicting the expection wind speed of described wind turbine cohort, and according to described wind speed, calculates the generating parameter of wind turbine cohort;
Described combined control system also comprises:
The 4th read module, is connected with described wind energy power prediction module, for reading described generating parameter;
Described control module specifically for, according to the generating parameter of described load dispatching instruction, the operating state of wind turbine cohort, the operating state of energy-storage system and described wind turbine cohort, determine by described energy storage monitor system and control described energy-storage system storage or discharge electric energy, to compensate the power output of described wind turbine cohort, make the power output at described convergent point place meet the output power of described electrical network.
As technique scheme preferably, described energy-storage system comprises combination or the power energy mating type energy storage device of power-type energy storage device and energy type energy storage device;
Power-type energy storage device described in the combination of described power-type energy storage device and energy type energy storage device, for when the output-power fluctuation frequency of wind turbine cohort is more than or equal to described first threshold, to the storage of the output electric energy of wind turbine cohort or to electrical network, discharge electric energy, level and smooth described wind turbine cohort is to the fluctuation of described electrical network delivered power;
Described energy type energy storage device, while being less than described first threshold for the output-power fluctuation frequency when wind turbine cohort, discharges electric energy to the storage of the output electric energy of wind turbine cohort or to electrical network, and large capacity savings or release electric energy, improve power coefficient.
As technique scheme preferably, described power-type energy storage device comprises: one or more in super capacitor energy-storage unit, flywheel energy storage unit and superconducting energy storage unit.
As technique scheme preferably, described energy type energy storage device comprises: retaining energy-storage units and/or compressed-air energy storage unit.
As technique scheme preferably, described power energy mating type energy storage device comprises: vulcanized sodium Na
2s battery and/or lithium ion battery.
The embodiment of the present invention also provides a kind of control method of above-mentioned wind turbine field system, comprising:
Control the storage of described energy-storage system or discharge electric energy, to compensate the power output of described wind turbine cohort, making the power output at described convergent point place meet the output power of described electrical network.
As technique scheme preferably, the described energy-storage system storage of described control or discharge electric energy and be specially:
Read load dispatching instruction, read the operating state of wind turbine cohort and the operating state of energy-storage system, and determine by described energy storage monitor system and control described energy-storage system storage or discharge electric energy according to described load dispatching instruction, the operating state of wind turbine cohort and the operating state of energy-storage system.
As technique scheme preferably, described method also comprises,
Predict the expection wind speed of described wind turbine cohort, and according to described wind speed, calculate the generating parameter of wind turbine cohort;
Read described generating parameter;
The described energy-storage system storage of described control or release electric energy are further: according to the generating parameter of described load dispatching instruction, the operating state of wind turbine cohort, the operating state of energy-storage system and described wind turbine cohort, determine by described energy storage monitor system and control described energy-storage system storage or discharge electric energy.
The invention provides a kind of wind turbine field system, comprising: wind turbine cohort, wind farm monitoring system, energy-storage system, energy storage monitor system and combined control system, described combined control system connects described electrical network, wind farm monitoring system and energy storage monitor system, for reading the operating state of wind turbine cohort and the operating state of energy-storage system, and according to described load dispatching instruction, the operating state of wind turbine cohort and the operating state of energy-storage system are determined by described energy storage monitor system and are controlled the storage of described energy-storage system or discharge electric energy, to compensate the power output of described wind turbine cohort, make the power output at described convergent point place meet the output power of described electrical network, make the power of input electrical network of wind turbine cohort more level and smooth, meet national grid-connected demand.The embodiment of the present invention also provides a kind of control method of wind turbine field system simultaneously.
Accompanying drawing explanation
Fig. 1 is prior art apoplexy group of motors topological structure schematic diagram;
Fig. 2 is the topological structure schematic diagram of embodiment of the present invention wind turbine field system;
Fig. 3 is the grid-connected schematic diagram of embodiment of the present invention wind turbine field system;
Fig. 4 is the schematic flow sheet of the control method of embodiment of the present invention wind turbine field system.
Embodiment
Fig. 2 is embodiment of the present invention wind turbine field system topological structure schematic diagram, shown in Fig. 2, the embodiment of the present invention provides a kind of wind turbine field system, comprising: wind turbine cohort 102, wind farm monitoring system 101, energy-storage system 202, energy storage monitor system 201 and combined control system 203, the input of energy-storage system 202 is connected to the output of wind turbine cohort 102, for storing the electric energy of wind turbine cohort 102, the output of the output of energy-storage system 202 and wind turbine cohort 102 is connected to electrical network 104 by confluence 103, for being jointly electrical network 104 power supplies, wind farm monitoring system 101 connects wind turbine cohort 102, for monitoring the operating state of wind turbine cohort 102, energy storage monitor system 201 connects energy-storage system 202, for monitoring the operating state of energy-storage system 202, combined control system 203 connects electrical network 104, wind farm monitoring system 101 and energy storage monitor system 201, the load dispatching instruction sending for reading electrical network 104, read the operating state of wind turbine cohort 102 and the operating state of energy-storage system 202, and according to load dispatching instruction, reading the operating state of wind turbine cohort 102 and the operating state of energy-storage system 202 determines by energy storage monitor system 201 control energy-storage system 202 storages or discharges electric energy, power output with compensation wind turbine cohort 102, make the I/O power of energy-storage system 202 and the power output sum of wind turbine cohort 102 equal mains supply power.
Concrete, wind farm monitoring system 101, for monitoring the operating state of wind turbine cohort 102, comprises the real-time power output of current wind turbine cohort 102, the parameters such as electric current, voltage.Energy storage monitor system 201 is for monitoring the operating state of energy-storage system 202, the concrete parameters such as the current stored energy amount of energy-storage system 202, power output, electric energy input condition that comprise.The working status parameter of above-mentioned monitoring is for the foundation as controlling wind turbine cohort 102 and energy-storage system 202 actions.
Combined control system 203 receives after the load dispatching instruction of electrical network 104 transmissions, controlling wind turbine cohort 102 and energy-storage system 202 is electrical network 104 power supplies by confluence 103 jointly, make energy-storage system 202 for the compensation of the power output with wind turbine cohort 102, the I/O power of energy-storage system 202 and the power output sum of wind turbine cohort 102 equal the power of electrical network 104.By energy-storage system 202 being set and controlling the compensation of 202 pairs of wind turbine cohort 102 power outputs of energy-storage system, thereby the stable power supply to electrical network 104, by the power output of 202 pairs of wind turbine cohorts 102 of energy-storage system, carry out " peak load shifting " or suppress power fluctuation, for the different operating modes of wind turbine cohort 102, dynamically adjust the power stage of energy-storage system 202.
Concrete combined control system 203 comprises: the first read module, is connected the load dispatching instruction sending for reading electrical network 104 with electrical network 104; The second read module, is connected with wind farm monitoring system 101, for reading the operating state of wind turbine cohort 102; Third reading delivery piece, is connected with energy storage monitor system 201, for reading the operating state of energy-storage system 202; Control module, according to the operating state of the operating state of load dispatching instruction, wind turbine cohort 102 and energy-storage system 202, determine by energy storage monitor system 201 and control energy-storage system 202 storages or discharge electric energy, with the power output of compensation wind turbine cohort 102, make the power output at convergent point 103 places meet the output power of electrical network 104.
Fig. 3 is the grid-connected schematic diagram of embodiment of the present invention wind turbine field system, and shown in Fig. 3, novel high-power energy-storage system (Large Power Storage System, LPSS) adopts novel energy-storing mode, can effectively improve the wind energy utilization of wind energy turbine set.Wind turbine cohort 102 is P through the power output of step-up transformer T
w, the output of energy-storage system 202 or absorbed power are P
lPSS, input electrical network 104 power are P
g, active power has following equilibrium relation:
P
w+P
LPSS=P
G
The electric power that wind energy produces through wind generator system, has significant randomness, intermittence and fluctuation, and this has just caused power output P
wunstable, however grid company wishes to inject the active-power P of electrical network
gheld stationary as far as possible.The thought of combination control method: by combined control system Real-Time Monitoring P
w, P
lPSS, P
g, under different operating modes, merge the energy of wind turbine cohort and large power energy storage system, control the P that effectively handles up that LPSS carries out power output
lPSS, to P
wfluctuation composition compensate or suppress, object is to make P
gapproach as far as possible its desired value
(meet the P that grid company requires
gideal value), allow the power stage of wind-powered electricity generation unit and wind energy turbine set reach best grid-connected requirement.
Be exemplified below, combined control system 203 is monitored the operating mode of wind turbine cohort 102 and energy-storage system 202 in real time by wind farm monitoring system 101 and energy storage monitor system 201:
Power output reduction when wind turbine cohort 102, combined control system 203 reads the power demands that load dispatching instruction obtains electrical network, through judgement, wind turbine cohort 102 cannot meet the need for electricity of electrical network 104, combined control system 203 control energy-storage systems 202 release energy, be energy-storage system 202 and the equal power output of wind turbine cohort 102, common is electrical network 104 power supplies, the power output sum of wind turbine cohort 102 and energy-storage system 202 and the need for electricity of electrical network 104 are consistent, effectively guarantee input power stable of electrical network 104;
Power output raising when wind turbine cohort 102, combined control system 203 reads the power demands that load dispatching instruction obtains electrical network, through judgement, wind turbine cohort 102 is far longer than the need for electricity of electrical network 104, combined control system 203 is controlled energy-storage system 202 stored energys, wind turbine cohort 102 is got up with respect to the power storage of electrical network 104 surpluses, reduce wind turbine cohort 102 to the power of electrical network 104 outputs, the need for electricity that is the power output of wind turbine cohort 102 and the input power sum of energy-storage system 202 and electrical network 104 is consistent, effectively the input power of assurance electrical network 104 is stable.
The invention provides a kind of wind turbine field system, this wind turbine field system is with respect to prior art, as introduced in Fig. 1, on the basis of existing wind turbine cohort 102 and wind farm monitoring system 101, novel high-power energy-storage system 202, energy storage monitor system 201 and combined control system 203Deng mechanism have been increased, realize in the level and smooth object of different operating mode leeward motor cohort 102 power outputs, to efficiently utilizing wind energy, level and smooth power stage, stablize grid-connected power, can both accomplish the end in view.At present, energy storage technology in electric power system provides brand-new approach for solving some existing issues that exist in power supply chain and realizing electrical network sustainable development, adopt extensive electric power energy storage technology, can effectively alleviate electricity consumption imbalance between supply and demand, improve power grid security and stability, improve power supply quality, and promote utilization and the development of regenerative resource.
Wind turbine field system provided by the invention, by being wind turbine cohort 102 increase energy-storage systems, by controlling energy-storage system storage or discharging electric energy, the power output of compensation wind turbine cohort, make the I/O power of energy-storage system and the power output sum of wind turbine cohort equal mains supply power, stablized because wind speed changes the power fluctuation producing, made the power output of wind-powered electricity generation unit or wind energy turbine set more level and smooth, met national grid-connected demand.
Further, wind turbine field system also comprises: wind energy power prediction module 204, be connected with combined control system 203, and the expection wind speed of wind energy power prediction module 204 prediction wind turbine cohorts 102, and according to the generating parameter of wind speed calculating wind turbine cohort 102.Concrete generating parameter can comprise, the power of generating, frequency equivalence.What wind energy power prediction module was concrete can be the information in conjunction with weather forecast, according to expert knowledge library built-in or external linkage, search priori, to wind speed predict or by wind speed with generating parameter as set up expected model between generated output.
For example April in 2012 10 day breeze motor cohort 102 locations wind speed be 5-6 level, can pass through wind energy power prediction module, monitoring according to wind turbine cohort to wind speed, and weather condition, the wind conditions of predict future in a period of time, and the power output situation of wind energy turbine set, the control that combined control system 203 can be carried out in advance energy-storage system energy is handled up is prepared.Certainly, for for predicting that the weather forecast information of the expection generated output parameter of wind turbine cohort 102 can be as accurate as hour.
Combined control system 203 comprises the 4th read module, is connected, for reading generating parameter with wind energy power prediction module 204; The control module of combined control system 203 specifically for, according to the generating parameter of the operating state of the operating state of load dispatching instruction, wind turbine cohort 102, energy-storage system 202 and wind turbine cohort, determine by energy storage monitor system 201 and control energy-storage system 202 storages or discharge electric energy, with the power output of compensation wind turbine cohort 102, make the power output at convergent point 103 places meet the output power of electrical network 104.Be specially by receiving the load dispatching instruction of electrical network 104, in addition combined control system 203 is by monitoring wind turbine cohort 102 with being connected of wind farm monitoring system 101, carry out wind energy power prediction simultaneously, set up wind energy forecast model, as set up corresponding model according to the generating parameter being recorded by wind energy power prediction module 204, and be connected energy-storage system 202 is carried out to energy requirement prediction with energy storage monitor system 201, realization compensates the power output of wind turbine cohort 102, for the different operating modes of wind-powered electricity generation unit, dynamically Modulating Power output.
Be exemplified below, the load dispatching instruction that reads electrical network 104 when combined control system 203 is that power load is larger, and the power output of current wind turbine cohort 102 can not be satisfied the demand, the energy type energy storage device 2022 that combined control system is controlled in current energy-storage system 202 discharges, and to reach Power Output for Wind Power Field, meets actual power load.Otherwise the energy type energy storage device 2022 that combined control system is controlled in current energy-storage system 202 carries out electric energy energy storage.
Powerful energy-storage system 202 will carry out handling up of wind turbine cohort 102 energy effectively, combined control system 203 is by receiving load dispatching instruction and the comprehensive wind energy power prediction of electrical network 104, the Energy Transfer of combined regulating wind turbine cohort and energy-storage system, smoothly stablizes power output.
Further, energy-storage system comprises power-type energy storage device 2021 (Power-usage Energy Storage, PES) and energy type energy storage device 2022 (Energy-usage Energy Storage, EES) combination or power energy mating type energy storage device, be one or more in mixed energy storage system (Hybrid Energy Storage System, HESS).
The output of energy-storage system 202 or absorbed power are P
lPSS, the power difference P that exports separately or absorb by power-type energy storage device 2021, energy type energy storage device 2022
pESand P
eEScommon composition, the task of LPSS is specifically shared by two class energy storage device PES and EES.Different grid company is for the P of various distributed power sources
gthere is different requirements.Input electrical network 104 power are P
g, active power has following equilibrium relation:
Power-type energy storage device 2021 in the combination of power-type energy storage device and energy type energy storage device, for when the output-power fluctuation frequency of wind turbine cohort 102 is more than or equal to first threshold, to the storage of the output electric energy of wind turbine cohort 102 or to electrical network, discharge electric energy, smooth wind power machine group is to the fluctuation of electrical network delivered power; Energy type energy storage device 2022, for when the output-power fluctuation frequency of wind turbine cohort 102 is less than first threshold, to the storage of the output electric energy of wind turbine cohort 102 or to electrical network 104, discharge electric energy, large capacity savings or release electric energy, improve power coefficient.
Concrete, it is fast that power-type energy storage device 2021 discharges and recharges speed, the demand power that is applicable to wind turbine cohort 102 output-power fluctuation frequency curves and electrical network 104 differs larger situation, power-type energy storage device 2021 can discharge and recharge action in time, for example, can be 5K kilowatt as the instantaneous power discharging and recharging in the time of 2 seconds.Thereby regulate when utilizing power-type energy storage device 2021 large to the vibration frequency of the power output of the power output wind turbine cohort 102 of wind turbine cohort 102.First threshold occurrence can rule of thumb be set.The power output that energy type energy storage device 2022 is applicable to the comparatively mild wind-powered electricity generation unit 102 of wind speed is compared in the little situation of the demand frequency fluctuation power difference of electrical network 104, energy type energy storage device 2022 plays and discharges and recharges action, thereby the power output of wind turbine cohort 102 is regulated.Both are used in combination and can effectively extend the useful life of energy storage device 202, the reaction speed of raising energy storage device 202 reduces holistic cost simultaneously.
And power energy mating type energy storage device self can regulate the compensation to the power output of wind turbine cohort 102 automatically.
Further, power-type energy storage device 2021 comprises: one or more in super capacitor energy-storage unit, flywheel energy storage unit and superconducting energy storage unit.
Concrete, super capacitor is selected in super capacitor energy-storage unit, as a kind of electrochemical element, there is not chemical reaction in thermal energy storage process, and thermal energy storage process is reversible, so ultracapacitor repeated charge can reach hundreds thousand of time, and can not cause environmental pollution.In addition, it has very high power density, for the 10-100 of battery doubly, be applicable to short time high-power output, charging rate is fast, pattern is simple, can adopt large current charge, can complete charging process in by several minutes at tens seconds.Flywheel energy storage unit mainly utilizes motor flywheel driven High Rotation Speed, becomes kinetic energy to store electric energy conversion, drives the energy storage mode of generator generating in needs with flywheel again.Energy accumulation device for fly wheel feature: flywheel energy storage has that efficiency is high, the construction period is short, the life-span is long, high energy storage, discharge and recharge quick, to discharge and recharge number of times unlimited and pollution-free etc. a little.Be applicable to electrical network frequency modulation and quality of power supply guarantee.Principle has mainly been applied in superconducting energy storage unit: a superconductor annulus is placed in to magnetic field, is cooled to below the critical temperature of annulus material, remove magnetic field, due to electromagnetic induction, in annulus, just have induced current to produce, as long as temperature remains on below critical temperature, electric current just can continue.Test shows, be not less than 100,000 years the die-away time of this electric current.Obviously this is a kind of desirable energy storage device, is called superconducting energy storage.The advantage of superconducting energy storage is a lot, is mainly that power is large, volume is light, volume is little, loss is little, reacts fast etc., and therefore application is very wide.As high power laser, need to be thousands of in instantaneous output and even the energy of up to ten thousand joules, this just can have superconducting magnetic energy storage to bear.Three kinds of above-mentioned power-type energy storage devices may be used solely to energy storage, also can combine and carry out energy storage.Except three kinds of above-mentioned power-type energy storage devices, all can fast charging and discharging and the power-type energy storage device of the applicable embodiment of the present invention all can be applied in the present embodiment.
Further, energy type energy storage device 2022 comprises: retaining energy-storage units and/or compressed-air energy storage unit.
Particularly, retaining energy-storage units can use wind-powered electricity generation " cistern " " all-vanadium liquid flow energy storage battery system " off and on, at times strong and at other times weak wind energy generates electricity and can pass through the effect of battery " cistern ", be delivered into reposefully electrical network, improve the security reliability of electrical network.Compressed-air energy storage unit can be for being used for compressed air in the network load low ebb phase by electric energy, air high pressure sealing, in the seabed of abandoned well, sedimentation air accumulator, cavern, expired Oil/gas Well or newly-built gas storage well, is discharged to the energy storage mode of compressed air pushing turbine generating in network load peak period.Two kinds of above-mentioned energy type energy storage devices may be used solely to energy storage, also can combine and carry out energy storage.Except two kinds of above-mentioned energy type energy storage devices, all can stable filling discharge and the energy type energy storage device that is suitable for the embodiment of the present invention all can be applied in the present embodiment.
Further, power energy mating type energy storage device comprises: Na
2s battery and/or lithium ion battery.Two kinds of above-mentioned power energy mating type energy storage devices may be used solely to energy storage, also can combine and carry out energy storage.Except two kinds of above-mentioned power energy mating type energy storage devices, all energy type energy storage devices all can be applied in the present embodiment.
Fig. 4 is the schematic flow sheet of the control method of embodiment of the present invention wind turbine field system, a kind of control method of above-mentioned wind turbine field system is also provided in conjunction with the embodiment of the present invention shown in 4, control energy-storage system storage or discharge electric energy, with the power output of compensation wind turbine cohort, make the power output at convergent point place meet the output power of electrical network.
The control method of the wind turbine field system that the embodiment of the present invention provides, by controlling energy-storage system storage or discharging electric energy, the power output of compensation wind turbine cohort, that is: by power ratio control type energy storage device, suppress power stage fluctuation, make the power output of wind-powered electricity generation unit or wind energy turbine set more level and smooth, meet national grid-connected demand; By controlling energy type energy storage device, peak load shifting, is consistent Power Output for Wind Power Field and actual power load, meets mains supply requirement.The core concept of this method is to be the generation mode of object by originally following the trail of based on wind turbine generator maximum wind energy, is converted to the generation mode that meets national grid-connected demand.
As technique scheme preferably, the method is specially:
Step 31: read the load dispatching instruction that electrical network sends, load dispatching instruction is specially, such as the required parameters such as output power of electrical network.
Step 32: read the operating state of wind turbine cohort and the operating state of energy-storage system.The wind turbine cohort of wind farm monitoring system and energy storage monitor system Real-Time Monitoring and the operating state of energy-storage system, can pass through the parameters such as the Real-Time Monitoring wind turbine cohorts such as electric current, voltage, power, electrical quantity sensor and energy-storage system electric current, voltage, power, electric weight.
Step 33: determine by energy storage monitor system and control energy-storage system storage or discharge electric energy according to load dispatching instruction, the operating state of wind turbine cohort and the operating state of energy-storage system, to compensate the power output of wind turbine cohort.Specifically for example, obtaining the energy storage situation of current energy-storage system and the power output of current wind turbine cohort the output power ratio required with electrical network compares: if the power output of current wind turbine cohort is greater than the required output power of electrical network, power stage scheme can be, energy-storage system by wind turbine cohort except for inputting part storage extra the electric energy of electrical network; If the power output of current wind turbine cohort is less than the required output power of electrical network, power stage scheme can be, energy-storage system and wind turbine cohort be jointly to mains supply, and the power supply of concrete energy-storage system is the part differing of the required electric energy of the electric energy of wind turbine cohort input electrical network and electrical network.Thereby can reach the object of level and smooth power output.
As technique scheme preferably, the method also comprises, the generating parameter of prediction wind turbine cohort; Read generating parameter; Control energy-storage system storage or discharge electric energy and be further: according to the generating parameter of load dispatching instruction, the operating state of wind turbine cohort, the operating state of energy-storage system and wind turbine cohort, determine by energy storage monitor system and control energy-storage system storage or discharge electric energy.
The concrete implementation procedure with above-mentioned relevant apparatus embodiment is identical, can, with reference to the record of above-mentioned relevant apparatus embodiment, not repeat them here in detail.
The energy monitoring of this method to wind energy turbine set and energy-storage system, Comprehensive Control energy-storage system is handled up to wind turbine cohort power stage undulate quantity, and the active power output of smooth wind power field reduces the impact of wind power output power fluctuation on electrical network.
At present, energy storage technology in electric power system provides brand-new approach for solving some existing issues that exist in power supply chain and realizing electrical network sustainable development, adopt extensive electric power energy storage technology, control method in conjunction with novel high-power energy-storage system, can effectively alleviate electricity consumption imbalance between supply and demand, improve power grid security and stability, improve power supply quality, and promote utilization and the development of regenerative resource.
Finally it should be noted that: each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit above; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a wind turbine field system of applying energy-storage system, is characterized in that, comprising: wind turbine cohort, wind farm monitoring system, energy-storage system, energy storage monitor system and combined control system;
The input of described energy-storage system is connected to the output of described wind turbine cohort, for storing the electric energy of described wind turbine cohort; The output of the output of described energy-storage system and described wind turbine cohort is connected to electrical network by confluence, for being jointly described mains supply;
Described wind farm monitoring system connects described wind turbine cohort, for monitoring the operating state of described wind turbine cohort; Described energy storage monitor system connects described energy-storage system, for monitoring the operating state of described energy-storage system;
Described combined control system connects described electrical network, wind farm monitoring system and energy storage monitor system, the load dispatching instruction sending for reading described electrical network, read the operating state of wind turbine cohort and the operating state of energy-storage system, and determine by described energy storage monitor system and control described energy-storage system storage or discharge electric energy according to described load dispatching instruction, the operating state of wind turbine cohort and the operating state of energy-storage system, to compensate the power output of described wind turbine cohort, make the power output at described convergent point place meet the output power of described electrical network.
2. wind turbine field system according to claim 1, is characterized in that, described combined control system comprises:
The first read module, is connected with described electrical network, the load dispatching instruction sending for reading described electrical network;
The second read module, is connected with described wind farm monitoring system, for reading the operating state of described wind turbine cohort;
Third reading delivery piece, is connected with described energy storage monitor system, for reading the operating state of described energy-storage system;
Control module, according to described load dispatching instruction, the operating state of wind turbine cohort and the operating state of energy-storage system, determine by described energy storage monitor system and control described energy-storage system storage or discharge electric energy, to compensate the power output of described wind turbine cohort, make the power output at described convergent point place meet the output power of described electrical network.
3. wind turbine field system according to claim 1 and 2, it is characterized in that, described wind turbine field system also comprises: wind energy power prediction module, be connected with described combined control system, described wind energy power prediction module is used for predicting the expection wind speed of described wind turbine cohort, and according to described wind speed, calculates the generating parameter of wind turbine cohort;
Described combined control system also comprises:
The 4th read module, is connected with described wind energy power prediction module, for reading described generating parameter;
Described control module specifically for, according to the generating parameter of described load dispatching instruction, the operating state of wind turbine cohort, the operating state of energy-storage system and described wind turbine cohort, determine by described energy storage monitor system and control described energy-storage system storage or discharge electric energy, to compensate the power output of described wind turbine cohort, make the power output at described convergent point place meet the output power of described electrical network.
4. according to the wind turbine field system described in any one in claim 1-3, it is characterized in that, described energy-storage system comprises combination or the power energy mating type energy storage device of power-type energy storage device and energy type energy storage device;
Power-type energy storage device described in the combination of described power-type energy storage device and energy type energy storage device, for when the output-power fluctuation frequency of wind turbine cohort is more than or equal to described first threshold, to the storage of the output electric energy of wind turbine cohort or to electrical network, discharge electric energy, level and smooth described wind turbine cohort is to the fluctuation of described electrical network delivered power;
Described energy type energy storage device, while being less than described first threshold for the output-power fluctuation frequency when wind turbine cohort, discharges electric energy to the storage of the output electric energy of wind turbine cohort or to electrical network, and large capacity savings or release electric energy, improve power coefficient.
5. wind turbine field system according to claim 4, is characterized in that, described power-type energy storage device comprises: one or more in super capacitor energy-storage unit, flywheel energy storage unit and superconducting energy storage unit.
6. wind turbine field system according to claim 4, is characterized in that, described energy type energy storage device comprises: retaining energy-storage units and/or compressed-air energy storage unit.
7. wind turbine field system according to claim 4, is characterized in that, described power energy mating type energy storage device comprises: vulcanized sodium Na
2s battery and/or lithium ion battery.
8. a control method for the wind turbine field system as described in any one in claim 1 to 7, is characterized in that, comprising:
Control the storage of described energy-storage system or discharge electric energy, to compensate the power output of described wind turbine cohort, making the power output at described convergent point place meet the output power of described electrical network.
9. control method according to claim 8, is characterized in that, the described energy-storage system storage of described control or release electric energy are specially:
Read load dispatching instruction, read the operating state of wind turbine cohort and the operating state of energy-storage system, and determine by described energy storage monitor system and control described energy-storage system storage or discharge electric energy according to described load dispatching instruction, the operating state of wind turbine cohort and the operating state of energy-storage system.
10. control method according to claim 9, is characterized in that, described method also comprises,
Predict the expection wind speed of described wind turbine cohort, and according to described wind speed, calculate the generating parameter of wind turbine cohort;
Read described generating parameter;
The described energy-storage system storage of described control or release electric energy are further: according to the generating parameter of described load dispatching instruction, the operating state of wind turbine cohort, the operating state of energy-storage system and described wind turbine cohort, determine by described energy storage monitor system and control described energy-storage system storage or discharge electric energy.
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