CN102646990A - Net source coordination oriented large wind farm closed-loop control system - Google Patents
Net source coordination oriented large wind farm closed-loop control system Download PDFInfo
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Abstract
The invention discloses a net source coordination oriented large wind farm closed-loop control system, which comprises a plurality of groups of fans constituting a wind farm fleet, routers for connecting each group of fan into the fleet, a terminal, a power grid local information measuring unit, a centralized control platform and a conventional power plant; the constituting units are connected by field buses in the system to carry out data transmission, the terminal is used as a processing terminal of the fans and the centralized control platform and is connected with the centralized control platform through a bus adapter card, a controller of the centralized control platform is arranged near a wind farm booster station, the local measured information of a power grid needing measurement includes boost bus voltage and frequency, the controller sends out transient state active and reactive control signals according to measurement information and combing field grid transient state coordination control, the control signals are sent to each fan through rapid field buses to realize active and reactive rapid adjustment of the wind farm fleet. Compared with the prior art, the large wind farm closed-loop control system disclosed by the invention realizes wind farm closed-loop control, and solves the problem of coordination of wind energy net source used as an accessing power source in wind power integration.
Description
Technical field
The present invention relates to the wind-electricity integration control technology, particularly relate to a kind of large-scale wind electricity station control system.
Background technology
In various regenerative resources, the wind-powered electricity generation energy is the focus that the whole world is paid close attention to.Wind-powered electricity generation has intermittence, fluctuation and randomicity characteristics, and the fluctuation range of exerting oneself is bigger usually, and speed is also very fast.Under the support that does not have energy storage device, can't be as other conventional power supplys it be meritoriously controlled with idle exerting oneself, bring big pressure to power system dispatching.Electric power system is made up of power supply and electrical network, no matter is to say from the dispatching management aspect or from the system dynamics aspect, and the coordination of power supply and electrical network all is very important.Especially this power supply of wind energy turbine set has inserted since the electrical network, and net source coordination problem is outstanding further, and electrical network and wind energy turbine set are coordinated to face a lot of difficulties.More particularly, the characteristic of meritorious fluctuation of exerting oneself of wind energy turbine set and no fm capacity own makes the mains frequency bad stability; The frequent start-stop of wind energy turbine set unit also causes frequency fluctuation and voltage fluctuation to electrical network; The wind-powered electricity generation unit does not have machinery inertial to electrical network, and stability of power system is had negative effect.Therefore; Current large-scale wind electricity field is friendly inadequately to " interface features " of electrical network; Occur many problem of disharmonys between the net source, these problems have had a strong impact on the fail safe and the economy of electric power system, and this is one of major technique obstacle of present wind-electricity integration.China's wind-electricity integration problem is special and complicated, still lacks the support of correlation technique and equipment both at home and abroad, makes the wind energy turbine set of having built up can not bring into play benefit well, and the wind energy turbine set production capacity can't fully discharge.
Therefore, the problem that exists in the above-mentioned prior art needs to solve through the controllability of managing to strengthen wind energy turbine set.And the controllability of wind energy turbine set is divided three levels:
The wind energy turbine set controllability of (1) first level is Stateful Inspection and Routine Management property start and stop control.The excitation control system of each unit and slurry are not got in touch with the wind energy turbine set supervisory control system apart from the regulating system Complete autonomy.The wind energy turbine set supervisory control system only has Stateful Inspection and start and stop control action to each unit.The meritorious adjusting of such wind energy turbine set is to realize through the start and stop to part of generating units.The existing wind energy turbine set majority of China belongs to this level.
The controllability of this level is towards power scheduling, and the wind energy turbine set of this level controllability can satisfy the technical specification that existing wind-powered electricity generation inserts electrical network basically, but the frequent start-stop of unit all has adverse effect to unit mechanical axis system and electrical network.
The wind energy turbine set controllability of (2) second levels is that Stateful Inspection and Routine Management property are regulated continuously.The excitation control system of each unit is autonomous with slurry apart from regulating system, but the meritorious of excitation control system can be revised by the wind energy turbine set supervisory control system with idle reference value.
Meritorious and the idle regulating command of the wind energy turbine set of this level is produced and is assigned to each unit by supervisory control system, is realized by each unit self control system again.China existing this type of demonstration project (Li Junfeng, Shi Pengfei, high tiger. Chinese wind-powered electricity generation development report 2010, regenerative resource Professional Committee of China Association of Resources Comprehensive Utilization, 2010.10.).
(3) Stateful Inspection and high-speed closed loop control.The excitation control system of each unit is controlled as interior ring apart from regulating system with slurry, and interior ring control still can be autonomous; In the wind energy turbine set supervisory control system, increase outer shroud control; The feedback quantity of outer shroud control be the dynamic key variables of reflection electrical network (as on the spot or merit angle, rotating speed, frequency and the power etc. in a distant place); Outer shroud control produces the excitation of each blower fan and regulates parameter with the slurry distance, and outer shroud is a closed-loop control system.At present, also there is not this type of engineering both at home and abroad.Therefore, this technical problem of needing to be resolved hurrily of the present invention just.
Summary of the invention
Problem based on above-mentioned prior art existence; The present invention proposes a kind of large-scale wind electricity field closed-loop control system of coordinating towards the net source; The basic framework of the closed-loop control through introducing the electrical network key message realizes that the wind energy turbine set height is controlled, for coordinating to provide feasible program in the final net source of realizing.
The present invention proposes a kind of large-scale wind electricity field closed-loop control system of coordinating towards the net source, this system comprises many groups blower fan 301 of forming a wind energy turbine set group of planes, router three 02, terminal organ 303, electrical network local information measuring unit 304, integrated control platform 305, the conventional power plant 306 that will organize a blower fan access group of planes; Above-mentioned each component units connects with fieldbus in native system, carries out transfer of data, and terminal organ 303 connects integrated control platform 305 as the processing terminal of blower fan and integrated control platform through bus adapter 307, it is characterized in that:
The strategy that said controller adopted mutual for according to this system either electric field and electric power system will be controlled the power of wind energy turbine set and be decomposed into the additional control to wind turbine.
This system also comprises selectable unit: big electrical network (307) and information measurement unit, an electrical network distant place (308).
When the WAMS (WAMS) that contains synchronous phasor measurement unit (PMU) was housed in satisfying electric power system, said electrical network local measurement information also comprises measured the conventional synchronous generator merit angle that wind field closes on.
This said fieldbus is divided into the control bus of communicating control information, the feedback bus that transmits feedback information, the controlling bus of delivery status monitor message; For control bus; Only there is main frame that the one-way data of slave is sent; Any slave is not sent out data to main frame, does not have communication task between any slave yet, and communication delay can be controlled in the 20ms; For feedback bus, only gather the electrical network characteristic information of or minority node, and measuring point distance set control center is nearer, the communication delay of feedback path is very little; For monitor bus, do not require the real-time of monitor node and physical quantity.
Compared with prior art; The present invention has realized the wind energy turbine set closed-loop control; Can realize in the wind-electricity integration that wind energy is coordinated as the net source of inserting power supply, solve the technical barrier that coordinate in large-scale wind power and Webweb source; Realized the controlled of wind energy turbine set, the senior centralized control system exploitation of the friendly type wind energy turbine set of electrical network has been had practical value; Simultaneously, solved communication delay problem in this system.
Description of drawings
Fig. 1 is wind energy turbine set group of planes control structure figure;
Fig. 2 is the building-block of logic of wind field centralized control of the present invention and the autonomous control of blower fan;
Fig. 3 is the large-scale wind electricity field closed-loop control system sketch map of coordinating towards the net source of the present invention;
Fig. 4 is a wind energy turbine set centralized control system information network structure chart of the present invention.
Embodiment
Specifically describe technical scheme of the present invention below in conjunction with accompanying drawing and specific embodiment.
For the height of realizing wind energy turbine set controlled; The present invention serves as the invention basis with the logic of wind energy turbine set group of planes control of the prior art and wind field centralized control and the autonomous control of blower fan; Imagination is set up " horizontal integration " control system on the wind energy turbine set aspect; This control system can be got up the behavior " binding " of all units, and all units of wind energy turbine set can both respond unified control command fast, make the power controlled property of whole wind electric field be similar to a typhoon machine.
As shown in Figure 1, for the present invention based on modernism electric field group of planes control structure.Control Network is used the high speed fieldbus, and the electrical network characteristic information is delivered to host computer as feedback quantity through fieldbus, and meritorious and the idle adjusting command of host computer are sent to wind turbine through fieldbus.In this group of planes, each is organized blower fan and inserts composition group of planes control structure through subnet router.
The present invention is based on power adjustments characteristic that the modernism group of motors realizes wind energy turbine set to reach the controlled of wind energy turbine set.Use for reference the theory of Distributed Control System (DCS), the control system of wind turbine is regarded as the field control level, control and the slurry that can independently accomplish excitation converter (for double-fed type) or stator side frequency converter (for direct-drive type) are apart from regulating.Centralized control system is regarded as process control level, sends control command and convey to the field control level according to the operation of power networks state.
Group of planes control system realizes through modulating each power of the assembling unit towards the grid side demand.But simultaneously, group of planes control also must keep the high degree of autonomy property of unit self control system, when responding collection control center control signal, should whether accept the PC control instruction according to the decision of this machine virtual condition.
As shown in Figure 2, for the large-scale wind electricity field closed-loop control system of coordinating towards the net source adopts autonomous control of blower fan and the logical construction that the additional control of wind field combines, be example with double-fed wind field.Its principle is following: wind field additional controller 21 is gathered voltage, the frequency increment (also can gather the merit angle increment of conventional power plant during the condition permission) of wind field common bus; Be delivered to integrated control platform through the high speed fieldbus, integrated control platform forms voltage control strategy, damping control strategy and merit angle control policy through the analysis to field net interaction model.What these control strategies were exported is the transient state active power of wind energy turbine set and the additional control signal of reactive power; These two control signals are sent to the meritorious and idle regulating loop of the wind turbine in the autonomous control of blower fan (the fan frequency converter control system) 22 with " broadcast packet " mode through fieldbus; Make wind turbine all regulate separately meritorious and idle simultaneously, reach the purpose of whole wind electric field and electrical network transient behavior coordination.
As shown in Figure 3, be the large-scale wind electricity field closed-loop control system of coordinating towards the net source of practical implementation of the present invention.Comprise that router three 02, terminal organ 303, electrical network local information measuring unit 304, integrated control platform 305, conventional power plant 306, selectable unit that many groups blower fan 301 of forming a wind energy turbine set group of planes, every group of blower fan are used to insert a group of planes also comprise information measurement unit, an electrical network distant place 308 and big electrical network 307; Above-mentioned each component units connects with fieldbus in native system, carries out transfer of data, and terminal organ 303 connects integrated control platform 305 as the processing terminal of blower fan and integrated control platform through bus adapter 307.
As the large-scale wind electricity field closed-loop control system of coordinating towards the net source of conventional power plant 306 uses, wherein:
Integrated control platform is arranged on controller near the wind field booster stations; The electrical network local measurement information that needs to measure comprises boost busbar voltage and frequency; During the condition permission; When the WAMS (WAMS) that contains synchronous phasor measurement unit (PMU) is housed in the electric power system, also can increases and measure the conventional synchronous generator merit angle that wind field closes on.Controller in conjunction with a net transient state coordination control strategy, sends the meritorious and idle control signal of transient state of transient state, and control signal is delivered to wind turbine through quick fieldbus according to metrical information, realizes the meritorious and idle quick adjustment of a wind field group of planes.Selection is arranged on controller near the wind field booster stations, is because the signal distance that controller is gathered is far away excessively, will increase the length of signal transmssion line, and can cause the time lag of signal transmission, influence control effect.Have only controller is arranged near the transmission speed that could when extracting whole audience parameter, guarantee signal the wind field booster stations.
In the above-mentioned control system; Control strategy comprises: the The mechanism of interaction effect of research wind energy turbine set and electric power system; Study the wind energy turbine set power control strategy on this basis; To be decomposed into the additional control to wind turbine to the power control of wind energy turbine set again, this strategy relates to the control characteristic of electric power system dynamics and wind-powered electricity generation unit, and existing bigger theoretical difficulty has the subject crossing characteristics again.
Above-mentioned group of planes control realizes through fieldbus, measures the delay problem of transmitting with control information and can't avoid, and therefore under the situation that delay component exists, how to guarantee that the stability of control system and the realization of controlled target also are Critical policies.
Owing to will implement closed-loop controls to all units of wind energy turbine set, belong on a large scale, multinode, distributed process control system, consider that again controlled target relates to stabilization of power grids problem, the real-time of fieldbus becomes needs the key technology that solves.The following problem of considered when using fieldbus: the selection of (1) standard for Fieldbus.Different bus standards has the different techniques characteristics, is applicable to different industrial occasions, should select the standard of rapid speed according to the real-time requirement of wind energy turbine set control; (2) in order to ensure real-time, after confirm using certain fieldbus, how should to study networking and definite network topology, network topology has certain influence to response speed; (3) according to the requirement and the addressable node scale of fieldbus of response speed, the section is carried out in the large-scale wind electricity field divide, each section design bus control system; (4) the research bus takies pattern, if the MS master-slave pattern can not meet the demands, then can consider to use and issue-consult pattern, and broadcast mode is accepted the load of formation to reducing the network equipment, reaches the purpose that improves response speed.(5) measuring and calculating of communication delay and processing.
The problem of the maximum that Fieldbus Based group of planes control system runs into is a communication delay, and excessive communication delay will make whole system not move.Wind energy turbine set remote monitoring has in the past mainly realized functions such as Stateful Inspection, parameter modification and unit start and stop, and these functions require not high to real-time, and closed loop control has in real time then proposed strict demand to real-time.Therefore, must communication delay be reduced to tolerance interval.No matter adopt which kind of bus, reduce communication delay and all must pay attention to 2 points: 1. reduce the information transmission tasks in the network; 2. balance network load is to improve utilization of network bandwidth.
For a system, the information transmitted of all is useful, cannot reduce in quantity.But we study the information of a system and are not difficult to find that its information can be divided into control information, feedback information, state monitoring information by kind.The information network structure that the closed-loop control system that this paper proposes adopts: for control bus; Only there is main frame that the one-way data of slave is sent; Any slave is not sent out data to main frame, does not have communication task between any slave yet, and communication delay can be controlled in the 20ms; For feedback bus, only gather the electrical network characteristic information of or minority node, and measuring point distance set control center is nearer, the communication delay of feedback path is very little; For monitor bus, the node of supervision and physical quantity are all a lot, but the monitoring physical amount is not participated in closed-loop control, require lower to its real-time.
It below is the large-scale wind electricity field closed-loop control system of coordinating towards the net source of the present invention that realizes based on the RTS analogue system.
Constitute matter simulating system based on RTDS, as shown in Figure 2.Wind energy turbine set is placed among the RTDS, and field bus control system is with physical form and RTDS interface.Adopt twoport fieldbus adapter to form bus 1 and bus 2.Electric network information among the RTDS by simulation delivery outlet output, after the analog quantity input module conversion of fieldbus, is read by host computer through bus 1.Host computer calculates the instruction to the wind energy turbine set power modulation according to certain control algolithm; The power modulation instruction is sent to bus 2; Each analog output module is accepted bus 2 data and converts analog quantity into to export to the wind turbine among the RTDS, regulates the power output of each unit.
In order to improve the efficient of closed-loop control system of the present invention, adopt and simplify the information flow method: for control bus, only have main frame that the one-way data of slave is sent, any slave is not sent out data to main frame, does not have communication task between any slave yet.When adopting " broadcast packet " to send data, communication delay can be controlled in the 10ms; For feedback bus, only gather the electrical network characteristic information of or minority node, and measuring point is nearer apart from integrated control platform, feedback path communication delay very little; For monitor bus, the node of supervision and physical quantity are all a lot, but the monitoring physical amount is not participated in closed-loop control, and its real-time problem is not in limit of consideration.Therefore, the conception of this control system can realize, can satisfy at tens of milliseconds to hundreds of milliseconds of time scales, carries out the meritorious and idle continuous quick adjustment of wind energy turbine set transient state.
Claims (5)
1. large-scale wind electricity field closed-loop control system of coordinating towards the net source, this system comprise many groups blower fan (301) of forming a wind energy turbine set group of planes, every group of blower fan are inserted router (302), terminal organ (303), electrical network local information measuring unit (304), integrated control platform (305), the conventional power plant (306) of a group of planes; Above-mentioned each component units connects with fieldbus in native system, carries out transfer of data, and terminal organ (303) connects integrated control platform (305) as the processing terminal of blower fan and integrated control platform through bus adapter (307), it is characterized in that:
Integrated control platform (305) is arranged on controller near the wind field booster stations; Electrical network local measurement information comprises boost busbar voltage and frequency; Controller is coordinated control according to metrical information in conjunction with a net transient state, sends transient state and gains merit and the idle control signal of transient state; And control signal delivered to wind turbine through quick fieldbus, realize the meritorious and idle quick adjustment of a wind field group of planes.
2. the large-scale wind electricity field closed-loop control system of coordinating towards the net source as claimed in claim 1; It is characterized in that; The strategy that said controller adopted mutual for according to this system either electric field and electric power system will be controlled the power of wind energy turbine set and be decomposed into the additional control to wind turbine.
3. the large-scale wind electricity field closed-loop control system of coordinating towards the net source as claimed in claim 1 is characterized in that this system also comprises selectable unit: big electrical network (307) and information measurement unit, a distant place (308).
4. the large-scale wind electricity field closed-loop control system of coordinating towards the net source as claimed in claim 1; It is characterized in that; When the WAMS that contains synchronous phasor measurement unit was housed in satisfying electric power system, said electrical network local measurement information also comprises measured the conventional synchronous generator merit angle that wind field closes on.
5. the large-scale wind electricity field closed-loop control system of coordinating towards the net source as claimed in claim 1; It is characterized in that this said fieldbus is divided into the control bus of communicating control information, the feedback bus that transmits feedback information, the controlling bus of delivery status monitor message, for control bus; Only there is main frame that the one-way data of slave is sent; Any slave is not sent out data to main frame, does not have communication task between any slave yet, and communication delay can be controlled in the 20ms; For feedback bus, only gather the electrical network characteristic information of or minority node, and measuring point distance set control center is nearer, the communication delay of feedback path is very little; For monitor bus, do not require the real-time of monitor node and physical quantity.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102856925A (en) * | 2012-09-03 | 2013-01-02 | 北京科诺伟业科技有限公司 | Comprehensive power distribution method for wind power plant |
| CN102916449A (en) * | 2012-10-19 | 2013-02-06 | 邵俊松 | Active and reactive coordination control method for cluster wind power plant based on power balance theory |
| CN103441522A (en) * | 2013-07-04 | 2013-12-11 | 贵州大学 | Method for automatically regulating active output of draught fans in wind power plant |
| CN103676671A (en) * | 2013-12-13 | 2014-03-26 | 华北电力大学 | Source-network cooperative combination real-time simulation system and experimental method |
| CN105322568A (en) * | 2014-07-17 | 2016-02-10 | 国家电网公司 | Distribution network wind power generation equipment synchronous operation device and synchronous operation method |
| CN105866682A (en) * | 2016-03-09 | 2016-08-17 | 国网江西省电力科学研究院 | Network source coordination performance test method and system thereof |
| CN107037733A (en) * | 2017-06-15 | 2017-08-11 | 中国东方电气集团有限公司 | Wind power plant energy storage hardware-in―the-loop test adjusts system and method |
| CN107370177A (en) * | 2017-07-18 | 2017-11-21 | 国网新疆电力公司电力科学研究院 | Variable Speed Wind Power Generator primary frequency modulation control device and application method |
| CN108808728A (en) * | 2018-05-28 | 2018-11-13 | 天津大学 | A kind of wind power generation set grid-connection control method |
| CN109802436A (en) * | 2019-01-25 | 2019-05-24 | 中国科学院电工研究所 | The power grid controlling device configuration method of distributed plesiochronous power grid measuring system |
| CN110519204A (en) * | 2018-05-21 | 2019-11-29 | 北京仁光科技有限公司 | Device, method and system for being interacted to the computer in a subnet |
| CN111564900A (en) * | 2020-04-14 | 2020-08-21 | 云南电网有限责任公司 | Stability control system comprising multiple direct current coordinated control main stations and regional stability control substations |
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| CN102856925A (en) * | 2012-09-03 | 2013-01-02 | 北京科诺伟业科技有限公司 | Comprehensive power distribution method for wind power plant |
| CN102916449A (en) * | 2012-10-19 | 2013-02-06 | 邵俊松 | Active and reactive coordination control method for cluster wind power plant based on power balance theory |
| CN102916449B (en) * | 2012-10-19 | 2016-09-21 | 邵俊松 | The control method for coordinating that a kind of cluster wind power plant based on power balance theory is meritorious and idle |
| CN103441522A (en) * | 2013-07-04 | 2013-12-11 | 贵州大学 | Method for automatically regulating active output of draught fans in wind power plant |
| CN103441522B (en) * | 2013-07-04 | 2015-08-12 | 贵州大学 | In automatic regulating wind power field blower fan gain merit export method |
| CN103676671A (en) * | 2013-12-13 | 2014-03-26 | 华北电力大学 | Source-network cooperative combination real-time simulation system and experimental method |
| CN103676671B (en) * | 2013-12-13 | 2016-06-22 | 华北电力大学 | A kind of source net coordinates associating real-time emulation system and experimental technique |
| CN105322568A (en) * | 2014-07-17 | 2016-02-10 | 国家电网公司 | Distribution network wind power generation equipment synchronous operation device and synchronous operation method |
| CN105322568B (en) * | 2014-07-17 | 2018-01-16 | 国家电网公司 | A kind of power distribution network wind power plant synchronous operation device and synchronous operation method |
| CN105866682A (en) * | 2016-03-09 | 2016-08-17 | 国网江西省电力科学研究院 | Network source coordination performance test method and system thereof |
| CN107037733B (en) * | 2017-06-15 | 2023-09-05 | 中国东方电气集团有限公司 | Wind farm energy storage hardware in-loop test adjustment system and method |
| CN107037733A (en) * | 2017-06-15 | 2017-08-11 | 中国东方电气集团有限公司 | Wind power plant energy storage hardware-in―the-loop test adjusts system and method |
| CN107370177A (en) * | 2017-07-18 | 2017-11-21 | 国网新疆电力公司电力科学研究院 | Variable Speed Wind Power Generator primary frequency modulation control device and application method |
| CN110519204A (en) * | 2018-05-21 | 2019-11-29 | 北京仁光科技有限公司 | Device, method and system for being interacted to the computer in a subnet |
| CN110519204B (en) * | 2018-05-21 | 2020-07-24 | 北京仁光科技有限公司 | Apparatus, method and system for interacting computers within a subnet |
| CN108808728B (en) * | 2018-05-28 | 2021-04-20 | 天津大学 | Grid-connected control method for wind generating set |
| CN108808728A (en) * | 2018-05-28 | 2018-11-13 | 天津大学 | A kind of wind power generation set grid-connection control method |
| CN109802436A (en) * | 2019-01-25 | 2019-05-24 | 中国科学院电工研究所 | The power grid controlling device configuration method of distributed plesiochronous power grid measuring system |
| CN111564900A (en) * | 2020-04-14 | 2020-08-21 | 云南电网有限责任公司 | Stability control system comprising multiple direct current coordinated control main stations and regional stability control substations |
| CN111564900B (en) * | 2020-04-14 | 2023-09-22 | 云南电网有限责任公司 | Stability control system comprising multiple direct current coordination control master stations and regional stability control substations |
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Application publication date: 20120822 |