CN102195294A - Wind farm reactive comprehensive optimization control method - Google Patents
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Abstract
The invention relates to a wind farm reactive comprehensive optimization control method. The method comprises the following steps of: inputting signals into a wind farm reactive comprehensive optimization control system; switching plant or wind farm grid combining point capacitors and reactors, controlling a static var compensator (SVC) and controlling wind farm units by using the wind farm reactive comprehensive optimization control system. Through the scheme, the automatic control level of wind farm scheduling, the utilization ratio of reactive configuration equipment and the voltage stabilization level of a power grid can be improved, and reactive power comprehensive optimization coordination control over wind farms is realized.
Description
Technical field
The present invention relates to electric power system control and new forms of energy access and control method automatically, be specifically related to a kind of wind energy turbine set reactive comprehensive optimal control method.
Background technology
Along with the fast development of wind-powered electricity generation, China's wind-powered electricity generation year adding new capacity and total installation of generating capacity leap into the front ranks of the world.China's electrical network is vast in territory, and the wind energy turbine set region disperses, the grid connected wind power unit is of a great variety, and the wind field capacity is bigger.Compare shortcoming such as wind energy turbine set ubiquity control disperses, automatization level is on the low side, scheduling controlling is on the weak side with traditional thermal power plant.Aspect voltage, idle configuration and control, configuration capacity deficiency that the part wind energy turbine set is idle, control device lack, and have caused general wind field and site busbar voltage qualification rate not high, and the input control rate of wind field is lower.Voltage power-less control with traditional voltage is compared, and the wind energy turbine set voltage power-less is controlled at the bigger difference of existence on controlling object, controlled target, the control algolithm, is mainly reflected in the following aspects:
(1) on the controlling object.Tradition thermal power plant utilizes automatism voltage control device AVC (Automatic Voltage Control) usually.Regulate the idle purpose of improving voltage that reaches of unit; The switching of transformer station's reactive power device control capacitor/reactor, the adjustment of load tap changer owing to be conditioned the discontinuity of object, cause the discontinuity of the idle control of transformer station.
(2) on the controlled target.The main purpose of the AVC of thermal power plant device is the voltage that keeps the main transformer high-voltage side bus, and the idle of each unit of balance exerted oneself, and voltage/idle quick support then is to realize automatically by AVR; Transformer station's reactive power device is controlled low-pressure side bus voltage by the switching of discrete idle device, the change of high and low pressure side reactive power flow; The idle control resource of wind energy turbine set both comprised directly drive, the adjustable idle amount of blower fan such as double-fed, also comprise idle resources such as Static Var Compensator, capacitor, reactor.
(3) on the control algolithm.Nargin, constant power factor, equal proportion scheduling algorithms such as the utilization of the AVC of thermal power plant device coordinate that unit is idle exerts oneself; Transformer station's reactive power device utilizes nine district figure to realize control usually, and wind field idle work optimization control system must be coordinated the control of this two classes resource on higher aspect.
Summary of the invention
The present invention is on the basis of traditional power plant, transformer station's automatism voltage control, characteristics in conjunction with wind field control, to improve wind field dispatching automation controlling level, improve the utilance of idle configuration device, the voltage maintenance level that improves electrical network is a purpose, realizes that the reactive power complex optimum coordination control of wind energy turbine set provides a kind of wind energy turbine set reactive comprehensive optimal control method.
The present invention adopts following technical proposals to be implemented:
A kind of wind energy turbine set reactive comprehensive optimal control method, its improvements are that described method comprises the steps:
A, to wind energy turbine set reactive comprehensive optimal control system input signal;
B, described wind energy turbine set reactive comprehensive optimal control system are to factory station or wind field and site capacitor, the switching of reactor, the control of Static Var Compensator SVC and the control of wind field unit.
The invention provides a kind of optimized technical scheme is: in the described steps A, described input signal comprises active power, reactive power and the voltage of instruction, wind speed and the site of scheduling; Described dispatch command is the wind field voltage target or inserts the total idle target of exerting oneself of transformer station; Described total idle target of exerting oneself is considered the restriction of power factor (PF).
Second optimized technical scheme provided by the invention is: among the described step B, blower fan energy monitor supervision platform is passed through in described control to the wind field unit, described wind energy turbine set reactive comprehensive optimal control system by and the communication of blower fan energy monitor supervision platform, assign the idle target of exerting oneself of wind-powered electricity generation unit, coordinate the idle control of described wind-powered electricity generation unit in the factory by described blower fan energy monitor supervision platform; Described control to the wind field unit is the field regulator assembly of controlling described wind-powered electricity generation unit indirectly, changes the idle of described wind-powered electricity generation unit and exerts oneself.
The 3rd optimized technical scheme provided by the invention is: described wind energy turbine set reactive comprehensive optimal control system and blower fan energy monitor supervision platform are by serial line interface or the communication of RJ45 network interface; Described wind energy turbine set reactive comprehensive optimal control system to blower fan energy monitor supervision platform Content of communciation comprises wind field voltage target and the idle target of exerting oneself of wind-powered electricity generation unit; Described blower fan energy monitor supervision platform to wind energy turbine set reactive comprehensive optimal control system communication content comprises that blower fan is meritorious, blower fan is idle, blower fan is idle exert oneself target, the idle upper limit of blower fan, lower limit, blower fan start platform number and treat the board number.
The 4th optimized technical scheme provided by the invention is: described wind energy turbine set reactive comprehensive optimal control system and Static Var Compensator are by serial line interface or the communication of RJ45 network interface; Described wind energy turbine set reactive comprehensive optimal control system to the Content of communciation of Static Var Compensator comprises wind field voltage target and the idle target of exerting oneself of Static Var Compensator; Described Static Var Compensator to the Content of communciation of wind energy turbine set reactive comprehensive optimal control system comprises Static Var Compensator control busbar voltage, the current control model of Static Var Compensator and the idle upper limit, lower limit.
Compared with prior art, the beneficial effect that reaches of the present invention is:
1) PREDICTIVE CONTROL of the discrete reactive apparatus of wind energy turbine set reactive comprehensive optimal control system utilization combines with the Based Intelligent Control of continuous reactive equipment and has realized orderly, the accurately control that wind field is idle in the method provided by the invention;
2) wind energy turbine set reactive comprehensive optimal control service system can be selected different architecture, configuration mode for use according to wind field scale, blower fan type, supervisory control system situation in the method provided by the invention, has guaranteed the fail safe of control and effective unification of flexibility;
3) method provided by the invention has multiple barring condition, guarantees on-the-spot idle control appliance safety; Barring condition had both comprised bus voltage value restriction, load tap changer, capacitor, the restriction of reactor action frequency, also comprised electric parameters restrictions such as blower fan is meritorious, idle, exciting current, and barring condition both can independently be provided with, capable of being combined again coming into force;
4) method provided by the invention has the Based Intelligent Control function; Can discern capacitor and transformer state by topological analysis, judge whether charged, whether be in stand-by heat; Can carry out identification to real time data, utilize the redundancy between voltage, idle telemetry and the switch remote signalling data in the station, find and debug measurement and on off state; Can be according to the switching frequency and the order of device characteristics list's optimizing equipment.
Description of drawings
Fig. 1 is a wind energy turbine set reactive comprehensive optimal control system construction drawing;
Fig. 2 is wind energy turbine set reactive comprehensive optimal control system and blower fan energy monitor supervision platform interface mode 1;
Fig. 3 is wind energy turbine set reactive comprehensive optimal control system and blower fan energy monitor supervision platform interface mode 2;
Fig. 4 is wind energy turbine set reactive comprehensive optimal control system and Static Var Compensator interface mode 1;
Fig. 5 is wind energy turbine set reactive comprehensive optimal control system and Static Var Compensator interface mode 2.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
A kind of wind energy turbine set reactive comprehensive optimal control method, this method comprise the steps: wind energy turbine set reactive comprehensive optimal control system input signal; Wind energy turbine set reactive comprehensive optimal control system is to factory station or wind field and site capacitor, the switching of reactor, the control of Static Var Compensator SVC (Static Var Compensator) and the control of wind field unit.
Wind energy turbine set reactive comprehensive optimal control system is according to the instruction of scheduling and the signal of wind farm grid-connected point, regulates the reactive-load compensation equipment of wind energy turbine set and the control system of wind-powered electricity generation unit itself, realizes the control of whole wind electric field idle work optimization.Input signal has active power, reactive power and the voltage of instruction, wind speed and the site of scheduling, controlled target for idle, the voltage that keeps wind energy turbine set etc. in the scope that scheduling requires.The dispatch command of electrical network is generally wind field voltage target (or inserting transformer station), total idle target of exerting oneself (considering the restriction of power factor (PF)), owing to penetrated the influence of power, wind field the idle influence of being gained merit of exerting oneself is bigger, must consider the influence of gaining merit when considering the idle constraint of exerting oneself, meritorious, idle control must accomplish to coordinate control.On the controlling object of wind energy turbine set reactive comprehensive optimal control system, consider factory station or wind field and site capacitor, the switching of reactor, the control of SVC, also comprise the control of wind field unit.The control of wind field unit both can be passed through blower fan energy monitor supervision platform, wind energy turbine set reactive comprehensive optimal control system passes through and the communication of blower fan energy monitor supervision platform, assign the idle target of exerting oneself of wind-powered electricity generation unit, coordinate the idle control of each unit in the factory by blower fan energy monitor supervision platform, also can directly control the field regulator assembly of blower fan, change the idle of unit and exert oneself.Wind energy turbine set reactive comprehensive optimal control system control scheme figure as shown in Figure 1.
Voltage target to the idle target of exerting oneself is calculated as follows:
Usually, it is wind field bus high side voltage value that dispatching down distributing is given the execution target of each wind field, and still, wind-powered electricity generation unit and SVC regulate is idle value.Therefore the voltage target conversion need be the idle target of exerting oneself.Convert according to following formula:
Wherein: Qtarget is the idle target of exerting oneself after converting; Utarget is the busbar voltage of dispatching down distributing; X-is the equivalent impedance of wind field external system; Utarget is the voltage target of dispatching down distributing; Uinitial, Qinitial are last stable state moment wind field busbar voltage and externally exchange idle.
The decomposition computation of the idle target of exerting oneself is as follows:
The adjustable reactive apparatus of wind energy turbine set comprises blower fan (double-fed, straight wind dispelling machine), load tap changer, capacitor, reactor, SVC equipment such as (SVG), and is typical, considers the reactive power target assignment problem under wind field configuration blower fan, the SVC condition.
According to etc. the nargin principle determine the idle adjusting target of blower fan, SVC.Computational process is as follows:
(1) the idle nargin of calculating blower fan.Under the meritorious condition of exerting oneself of current blower fan, the idle bound Qwmax that exerts oneself, Qwmin are according to the idle nargin of (Qw-Qwmin)/(Qwmax-Qwmin) calculating blower fan.Wherein Qw, Qwmax and Qwmin are that blower fan is currently idlely exerted oneself, the idle upper limit and the idle lower limit of exerting oneself of exerting oneself.
(2) calculate the adjustable idle nargin of SVC.Under the current idle condition of exerting oneself of SVC, the idle bound Qsmax that exerts oneself, Qsmin are according to the idle nargin of (Qs-Qsmin)/(Qsmax-Qsmin) calculating SVC.Wherein Qw, Qwmax and Qwmin be that SVC currently idlely exerts oneself, the idle regulating power upper limit, idle regulating power lower limit.
(3) calculate the idle nargin that wind field need reach under the fresh target condition.Calculate the idle nargin that need reach according to Qk=(Qtarget-Qwmin-Qsmin)/(Qwmax-Qwmin+Qsmax-Qsmin).
(4) calculate blower fan, SVC and under this nargin, need the idle regulated quantity that reaches.Computing formula is:
Qstagert＝Qsmin+(Qsmax-Qsmin)*Qk；
Qwtarget＝Qwmin+(Qwmax-Qwmin)*Qk；
Wherein: Qstagert, Qwtarget are the idle target of exerting oneself that SVC and blower fan need be regulated.
The execution of the idle target of exerting oneself:
The idle adjusting of blower fan is undertaken by the energy monitor supervision platform of blower fan, meritorious, idle the exerting oneself of blower fan energy monitor supervision platform monitoring blower fan, and regulate, regulating cycle is generally about 1min.Wind energy turbine set reactive comprehensive optimal control system and blower fan energy monitor supervision platform are by the communication modes exchange message, and communication interface is network or serial line interface.Wind energy turbine set reactive comprehensive optimal control system and blower fan energy monitor supervision platform are by serial line interface or the communication of RJ45 network interface; Wind energy turbine set reactive comprehensive optimal control system to blower fan energy monitor supervision platform Content of communciation comprises wind field voltage target and the idle target of exerting oneself of blower fan; Blower fan energy monitor supervision platform to wind energy turbine set reactive comprehensive optimal control system communication content comprises that blower fan is meritorious, blower fan is idle, the idle upper limit of blower fan, lower limit, blower fan start platform number and treat the board number.
The wind energy turbine set reactive integrated control system passes through the adjusting with SVC interface control SVC.Two class interfaces are arranged, and a class is the node signal of the control SVC of system and the feedback signal of SVC; Another kind of is the communication interface of system and SVC, in order to assign the adjusting target to SVC.Wind energy turbine set reactive comprehensive optimal control system and Static Var Compensator (SVC) are by serial line interface or the communication of RJ45 network interface; Wind energy turbine set reactive comprehensive optimal control system to the Content of communciation of Static Var Compensator (SVC) comprises wind field voltage target and the idle target of exerting oneself of Static Var Compensator (SVC); Static Var Compensator (SVC) to the Content of communciation of wind energy turbine set reactive comprehensive optimal control system comprises Static Var Compensator (SVC) control busbar voltage, the current control model of Static Var Compensator (SVC) and the idle upper limit, lower limit.
Fault-tolerant, fault detection mechanism is as follows:
The wind energy turbine set reactive integrated control system is the idle optimal control of locking under following situation:
(1) wind energy turbine set reactive integrated control system equipment fault: include but not limited to device hardware fault, communication failure, the unusual situation of SVC plant failure consersion unit;
(2) electric network fault: comprise high voltage bus voltage oscillation, short-circuit conditions; But the adjusting of the voltage oscillation of system or not locking of disturbance SVC;
(3) the out-of-limit locking of reaction electric parameters:, transformer mesolow side voltage out-of-limit, overcurrent condition out-of-limit as high voltage bus voltage.
Wind energy turbine set reactive comprehensive control method provided by the invention has improved wind field dispatching automation controlling level, improved the utilance of idle configuration device, the voltage maintenance level that has improved electrical network is a purpose, has realized that the reactive power complex optimum of wind energy turbine set is coordinated control.
Should be noted that at last: only illustrate that in conjunction with the foregoing description technical scheme of the present invention is not intended to limit.Those of ordinary skill in the field are to be understood that: those skilled in the art can make amendment or are equal to replacement the specific embodiment of the present invention, but these modifications or change are all among the claim protection range that application is awaited the reply.
Claims (5)
1. a wind energy turbine set reactive comprehensive optimal control method is characterized in that described method comprises the steps:
A, to wind energy turbine set reactive comprehensive optimal control system input signal;
B, described wind energy turbine set reactive comprehensive optimal control system are to factory station or wind field and site capacitor, the switching of reactor, the control of Static Var Compensator SVC and the control of wind field unit.
2. wind energy turbine set reactive comprehensive optimal control method as claimed in claim 1 is characterized in that, in the described steps A, described input signal comprises active power, reactive power and the voltage of instruction, wind speed and the site of scheduling; Described dispatch command is the wind field voltage target or inserts the total idle target of exerting oneself of transformer station; Described total idle target of exerting oneself is considered the restriction of power factor (PF).
3. wind energy turbine set reactive comprehensive optimal control method as claimed in claim 1, it is characterized in that, among the described step B, blower fan energy monitor supervision platform is passed through in described control to the wind field unit, described wind energy turbine set reactive comprehensive optimal control system by and the communication of blower fan energy monitor supervision platform, assign the idle target of exerting oneself of wind-powered electricity generation unit, coordinate the idle control of described wind-powered electricity generation unit in the factory by described blower fan energy monitor supervision platform; Described control to the wind field unit is the field regulator assembly of controlling described wind-powered electricity generation unit indirectly, changes the idle of described wind-powered electricity generation unit and exerts oneself.
4. wind energy turbine set reactive comprehensive optimal control method as claimed in claim 1 is characterized in that, described wind energy turbine set reactive comprehensive optimal control system and blower fan energy monitor supervision platform are by serial line interface or the communication of RJ45 network interface; Described wind energy turbine set reactive comprehensive optimal control system to blower fan energy monitor supervision platform Content of communciation comprises wind field voltage target and the idle target of exerting oneself of wind-powered electricity generation unit; Described blower fan energy monitor supervision platform to wind energy turbine set reactive comprehensive optimal control system communication content comprises that blower fan is meritorious, blower fan is idle, blower fan is idle exert oneself target, the idle upper limit of blower fan, lower limit, blower fan start platform number and treat the board number.
5. wind energy turbine set reactive comprehensive optimal control method as claimed in claim 1 is characterized in that, described wind energy turbine set reactive comprehensive optimal control system and Static Var Compensator are by serial line interface or the communication of RJ45 network interface; Described wind energy turbine set reactive comprehensive optimal control system to the Content of communciation of Static Var Compensator comprises wind field voltage target and the idle target of exerting oneself of Static Var Compensator; Described Static Var Compensator to the Content of communciation of wind energy turbine set reactive comprehensive optimal control system comprises Static Var Compensator control busbar voltage, the current control model of Static Var Compensator and the idle upper limit, lower limit.
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354992A (en) * | 2011-09-30 | 2012-02-15 | 北京四方继保自动化股份有限公司 | Reactive-power control method of wind power field |
| CN102567813A (en) * | 2012-01-20 | 2012-07-11 | 江苏省电力设计院 | Optimal selection method for wind generation sets in wind power farm |
| CN102684201A (en) * | 2012-05-30 | 2012-09-19 | 华南理工大学 | Voltage threshold probability-based reactive power optimizing method for grid containing wind power plant |
| CN102709925A (en) * | 2012-06-27 | 2012-10-03 | 国电联合动力技术有限公司 | Reactive power automatic regulating system on basis of wind power station SCADA (Supervisory Control And Data Acquisition) system |
| CN102738807A (en) * | 2012-06-20 | 2012-10-17 | 吉林省电力有限公司电力科学研究院 | All-station reactive optimal control method for intensively integrating wind farms into public transformer substation |
| CN103151795A (en) * | 2013-01-25 | 2013-06-12 | 沈阳工业大学 | Scattered-type wind power plant reactive power optimization control method capable of reducing fan losses and system |
| CN104052069A (en) * | 2014-06-13 | 2014-09-17 | 国家电网公司 | Reactive power optimization method of distributed wind power connection region |
| CN104065079A (en) * | 2014-07-14 | 2014-09-24 | 东方电子股份有限公司 | Coordination control method for wind power discretization and continuous reactive compensation |
| WO2014190759A1 (en) * | 2013-05-27 | 2014-12-04 | 国家电网公司 | Svc compensation strategy optimization method |
| CN104333008A (en) * | 2014-11-10 | 2015-02-04 | 安徽立卓智能电网科技有限公司 | Reactive voltage control method for improving voltage qualified rate of wind power plant |
| CN104701856A (en) * | 2015-03-16 | 2015-06-10 | 国网上海市电力公司 | Method of controlling reactive voltage at grid connection point of wind power plant |
| CN105207224A (en) * | 2015-09-18 | 2015-12-30 | 海南电网有限责任公司 | Reactive replacement control method for static Var compensators, capacitor and electric reactor |
| CN105262099A (en) * | 2015-10-29 | 2016-01-20 | 海南电网有限责任公司 | Method for adjusting voltage of wind farm through coordination and cooperation of blower fan and voltage-adjustable reactive compensator |
| CN107257133A (en) * | 2017-06-12 | 2017-10-17 | 浙江群力电气有限公司 | A kind of idle work optimization method, device and AVC systems |
| CN113471981A (en) * | 2020-03-31 | 2021-10-01 | 新疆金风科技股份有限公司 | Reactive power control method, device and system for grid connection in wind power plant cluster |
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2011
- 2011-05-16 CN CN201110124920.0A patent/CN102195294B/en not_active Expired - Fee Related
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| 戴日俊等: "风电场无功综合优化控制策略探讨", 《内蒙古电力技术》 * |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354992A (en) * | 2011-09-30 | 2012-02-15 | 北京四方继保自动化股份有限公司 | Reactive-power control method of wind power field |
| CN102567813A (en) * | 2012-01-20 | 2012-07-11 | 江苏省电力设计院 | Optimal selection method for wind generation sets in wind power farm |
| CN102684201A (en) * | 2012-05-30 | 2012-09-19 | 华南理工大学 | Voltage threshold probability-based reactive power optimizing method for grid containing wind power plant |
| CN102684201B (en) * | 2012-05-30 | 2014-07-02 | 华南理工大学 | Voltage threshold probability-based reactive power optimizing method for grid containing wind power plant |
| CN102738807A (en) * | 2012-06-20 | 2012-10-17 | 吉林省电力有限公司电力科学研究院 | All-station reactive optimal control method for intensively integrating wind farms into public transformer substation |
| CN102738807B (en) * | 2012-06-20 | 2013-11-20 | 吉林省电力有限公司电力科学研究院 | All-station reactive optimal control method for intensively integrating wind farms into public transformer substation |
| CN102709925A (en) * | 2012-06-27 | 2012-10-03 | 国电联合动力技术有限公司 | Reactive power automatic regulating system on basis of wind power station SCADA (Supervisory Control And Data Acquisition) system |
| CN103151795A (en) * | 2013-01-25 | 2013-06-12 | 沈阳工业大学 | Scattered-type wind power plant reactive power optimization control method capable of reducing fan losses and system |
| WO2014190759A1 (en) * | 2013-05-27 | 2014-12-04 | 国家电网公司 | Svc compensation strategy optimization method |
| CN104052069A (en) * | 2014-06-13 | 2014-09-17 | 国家电网公司 | Reactive power optimization method of distributed wind power connection region |
| CN104065079A (en) * | 2014-07-14 | 2014-09-24 | 东方电子股份有限公司 | Coordination control method for wind power discretization and continuous reactive compensation |
| CN104333008A (en) * | 2014-11-10 | 2015-02-04 | 安徽立卓智能电网科技有限公司 | Reactive voltage control method for improving voltage qualified rate of wind power plant |
| CN104333008B (en) * | 2014-11-10 | 2016-06-08 | 安徽立卓智能电网科技有限公司 | A kind of reactive voltage control method improving wind energy turbine set rate of qualified voltage |
| CN104701856A (en) * | 2015-03-16 | 2015-06-10 | 国网上海市电力公司 | Method of controlling reactive voltage at grid connection point of wind power plant |
| CN105207224A (en) * | 2015-09-18 | 2015-12-30 | 海南电网有限责任公司 | Reactive replacement control method for static Var compensators, capacitor and electric reactor |
| CN105262099A (en) * | 2015-10-29 | 2016-01-20 | 海南电网有限责任公司 | Method for adjusting voltage of wind farm through coordination and cooperation of blower fan and voltage-adjustable reactive compensator |
| CN107257133A (en) * | 2017-06-12 | 2017-10-17 | 浙江群力电气有限公司 | A kind of idle work optimization method, device and AVC systems |
| CN113471981A (en) * | 2020-03-31 | 2021-10-01 | 新疆金风科技股份有限公司 | Reactive power control method, device and system for grid connection in wind power plant cluster |
| CN113471981B (en) * | 2020-03-31 | 2022-08-09 | 新疆金风科技股份有限公司 | Reactive power control method, device and system for grid connection in wind power plant cluster |
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