CN202917983U - Wind turbine generator reactive adjusting system based on wind power plant AQC - Google Patents
Wind turbine generator reactive adjusting system based on wind power plant AQC Download PDFInfo
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- CN202917983U CN202917983U CN2012206095336U CN201220609533U CN202917983U CN 202917983 U CN202917983 U CN 202917983U CN 2012206095336 U CN2012206095336 U CN 2012206095336U CN 201220609533 U CN201220609533 U CN 201220609533U CN 202917983 U CN202917983 U CN 202917983U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The utility model relates to a wind turbine generator reactive adjusting system based on a wind power plant AQC. The wind turbine generator reactive adjusting system comprises a power grid electric power system, a boost station monitoring system, a blower fan monitoring system and a wind power plant grid connection point reactive power measuring device, wherein the power grid electric power system, the boost station monitoring system and the wind power plant grid connection point reactive power measuring device are in communication connection with the blower fan monitoring system. According to the wind turbine generator reactive adjusting system, reactive allocation in a wind power plant is realized, reactive supporting capacity is given to a power grid, investment capacity of a wind power plant centralized reactive compensation device and the operation loss of the device are reduced farthest, and purchase investment cost is saved.
Description
Technical field
The utility model relates to technical field of wind power generation, particularly relates to a kind of idle regulating system of wind-powered electricity generation unit based on wind energy turbine set AQC.
Background technology
Present wind energy turbine set is in more remote area mostly, and is far away apart from the trunk electrical network, needs to link to each other with electrical network by the power transmission line of long distance.This light current net of wind energy turbine set connects the voltage control that makes wind energy turbine set, reactive power management, dynamically the behavior of wind-driven generator etc. has obtained paying close attention to widely behind angle stability and the grid disturbance.For guaranteeing power network safety operation, requirement to the operation of grid type wind turbine generator is more and more higher, at present power grid operation commercial city requirement wind energy turbine set self under the electrical network normal running (operation) conditions can be regulated reactive power and the voltage of electrical network access point, carry out reactive power compensation, to guarantee the voltage stabilization of electrical network access point, prevent because wind speed changes the access point voltage fluctuation that brings.
Double-fed wind power generator is to adopt at present the most widely machine category, double-fed type advantage is to realize with lower converter cost the variable speed constant frequency operation of unit, can also realize in addition meritorious idle independent flexible control, therefore the double-fed fan motor unit both can be used as meritorious power supply in electric power system, also can be used as reactive power source.Line voltage is subjected to the impact of the reactive power transmitted in the electrical network, can adjust line voltage by the reactive power in the control electrical network.The double-fed fan motor unit is as important reactive source, should bring into play due effect aspect the line voltage stablizing, and the idle control strategy of research double-fed fan motor unit seems very necessary.Be the raising ability that is incorporated into the power networks, electrical network requires wind energy turbine set configuration reactive power compensator, the most effectively reactive power compensator is SVG at present, and 49.5MW(is roughly equal to 33 1.5MW with installation) wind energy turbine set need to compensate 20% idle calculating, whole wind field need to drop into the SVG equipment about 2,000,000 yuan.Along with the growth of wind field capacity, SVG equipment investment expense is also in proportional increase.China annual expectation installation 12000MW, same by compensation 20% idle calculating, SVG equipment investment expense is 4.8 hundred million yuan.The SVG investment is large, and utilizes the idle fan-out capability of wind-powered electricity generation unit itself can reduce wind energy turbine set operating cost!
At present, reactive power control system of wind power station is the AQC system that sets up under wind farm monitoring system, the structure of wind energy turbine set AQC system, and needing increases hardware cost, and the cycle is longer.Under the present mode, the wind-powered electricity generation unit that participates in idle adjusting in the wind energy turbine set all is passive executors, wind energy turbine set AQC system calculates the reactive power that a unit group of planes need be exported through controller, this idle apportioning cost of execution that the wind-powered electricity generation unit is passive, and this is comprising other reactive-load compensation equipments in the wind field.Because the core algorithm of AQC is to realize that at middle control host computer server the real-time of host computer server controls is relatively poor, closed-loop adjustment lags behind serious.
This shows, the regulating system of reactive power exists obvious deficiency and defective in the prior art, therefore, how to found a kind of idle regulating system of wind-powered electricity generation unit based on wind energy turbine set AQC that can reduce wind energy turbine set operating cost, can realize the real-time closed-loop adjusting, real one of the current important research and development problem that belongs to.
The utility model content
The technical problems to be solved in the utility model provides a kind of idle regulating system of wind-powered electricity generation unit based on wind energy turbine set AQC, make it save the host computer hardware cost, realize the real-time closed-loop adjustment, coordination control between Reactive Compensation in Wind Farm equipment and the unit operation, thus overcome the deficiencies in the prior art.
For solving the problems of the technologies described above, the utility model provides a kind of idle regulating system of wind-powered electricity generation unit based on wind energy turbine set AQC, comprise grid power system, booster stations supervisory control system, fan monitoring system and wind farm grid-connected some wattless power measurement device, wherein: communication connects between grid power system, booster stations supervisory control system, wind farm grid-connected some wattless power measurement device and the fan monitoring system.
As further improvement of the utility model, the communication of described booster stations supervisory control system is connected with centralized reactive-load compensation equipment.
Described centralized reactive-load compensation equipment is SVC or SVG.
Adopt international ethernet communication agreement between described grid power system, booster stations supervisory control system and the fan monitoring system, adopt the RS232/RS485 communications protocol between booster stations supervisory control system and the centralized reactive-load compensation equipment.
Described fan monitoring system also is connected with capacitance group and/or reactor.
Described wind farm grid-connected some wattless power measurement device is by the server host of RS232 serial communication circuit connecting fan supervisory control system; Described wind farm grid-connected some wattless power measurement device reads wind farm grid-connected reactive power information after unpacking by Modbus serial data message.
Described wind farm grid-connected some wattless power measurement device adopts high accuracy electric energy quality module collection signal.
After adopting above design, following beneficial effect is arranged compared with prior art:
1, the utility model relies on existing wind energy turbine set framework, and wind field AQC software algorithm and hardware platform are all realized at slave computer, need not Construction of Wind Power side and purchase the AQC software control system, have saved wind energy turbine set AQC secondary system development time and software systems acquisition cost;
2, the preferential idle regulating power that uses the double-fed fan motor machine in the utility model, when compensation capacity is not enough, drop into centralized reactive-load compensation equipment, realized the coordination control between Reactive Compensation in Wind Farm equipment and the unit operation, realize the inner idle allotment of wind energy turbine set and give the electric network reactive-load enabling capabilities, reduce to greatest extent the input capacity and the running wastage that reduces equipment of the centralized reactive-load compensation equipment of wind energy turbine set;
3, the utility model is given full play to self closed-loop adjustment ability based on separate unit wind-powered electricity generation unit power reactive power control system in the wind field, farthest saves the hardware cost of host computer.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of drawings
Above-mentioned only is the general introduction of technical solutions of the utility model, and for can clearer understanding the utility model, the utility model is described in further detail below in conjunction with accompanying drawing and embodiment.
Fig. 1 is that the utility model forms schematic diagram based on the idle regulating system of the wind-powered electricity generation unit of wind energy turbine set AQC.
Fig. 2 is the wattless power measurement fluctuation schematic diagram of wind farm grid-connected point when the employing cycle being 1s.
Fig. 3 is the wattless power measurement fluctuation schematic diagram of wind farm grid-connected point when the employing cycle being 1ms.
Embodiment
See also shown in Figure 1, the utility model is based on the idle regulating system of wind-powered electricity generation unit of wind energy turbine set AQC, mainly be in the original supervisory control system of wind energy turbine set---on the basis of grid power system, booster stations supervisory control system, fan monitoring system configuration and communication link network (for example optical fiber ring network of existing wind energy turbine set), wind farm grid-connected some wattless power measurement device and centralized reactive-load compensation equipment have been increased, with whole wind energy turbine set or the idle reference value as idle adjusting of unit main transformer step-up side.Wherein, in the perfect situation of the idle adjusting of wind-powered electricity generation unit, also can remove centralized reactive-load compensation equipment, set up separately wind farm grid-connected some wattless power measurement device, can reach technique effect of the present utility model equally.
Adopt international ethernet communication agreement between grid power system, booster stations supervisory control system and the fan monitoring system, adopt the RS232/RS485 communications protocol between booster stations supervisory control system and centralized reactive-load compensation equipment.
The function of wind farm grid-connected some wattless power measurement device is the Real-time Collection of realizing the wind-powered electricity generation reactive power, the signal that will obtain from PCC point PT transducer and CT transducer, be published to the SCADA server by the Modbus Transmission Control Protocol through serial ports, image data is published to each unit in the wind field through wind electric field blower supervisory control system (SCADA).Wind energy turbine set wattless power measurement device communications protocol is RS485 or TCP/IP communication mode, and reading of information is to unpack by Modbus serial data message to obtain afterwards.
Specifically, wind farm grid-connected some wattless power measurement device, available device model is JaNitZa UMG 604, the device of this model has following characteristic:
Precision 0.5S level (... / 5A; / 1A);
The every cycle of sample rate 400 times, the 20kHz/ passage;
Communication modes: Ethernet, Modbus, RS485, Profibus;
According to EN50160 and the on-line automatic generating electric energy quality report of IEC 61000-4-2;
Detecting Power Harmonics 1～40 time;
Monitor in short-term interruption, voltage dip, rise sharply, transient affair, total percent harmonic distortion, degree of unbalance, meritorious, idle, apparent power, electric energy (Rong Xing ﹠amp; Perception), harmonic power etc.;
Monitoring running state, the logout instrument is supported high speed Modbus communications protocol.
Wind farm grid-connected some wattless power measurement device of the present utility model, adopt high accuracy electric energy quality module that the wind field spot correlation information data that is incorporated into the power networks is read, but the monitor data of idle adjusting is not limited to this, for example also can comprise: electric energy quality harmonic analysis, voltage flicker record etc.During work, quality of power supply module in wind farm grid-connected some wattless power measurement device gathers the valid data of PCC point PT transducer and CT transducer within the ms level sampling period, and calculate wind farm grid-connected some reactive power fluctuation and the demand obtained by inside modules, this also is the adjusting target of feeding back in the adjustment process, regulate target data process RS232 serial communication circuit and deliver to the background server main frame of fan monitoring system, and finish the also demonstration of site adjusting target, control curve etc. by the visual studio demonstration control of SCADA server.
The utility model is based on the idle control method of wind-powered electricity generation unit of wind energy turbine set AQC, and concrete steps are: the fan monitoring system receives the idle setting instruction that the grid power system call issues; Wind farm grid-connected some wattless power measurement device gathers wind farm grid-connected dot information, and calculates wind farm grid-connected some reactive power fluctuation and demand; Gathered switching state, malfunction and the input capacity data of centralized reactive-load compensation equipment by the booster stations supervisory control system; The idle setting instruction (measured value or dispatch command) that the fan monitoring system will receive, and switching state, malfunction and the input capacity etc. of reactive power real-time measuring data (being wind farm grid-connected some reactive power fluctuation and demand), centralized reactive-load compensation equipment, real time down is to wind-powered electricity generation units all in the wind field; The master control of wind-powered electricity generation unit, idle as reference take whole wind energy turbine set or unit main transformer step-up side, realize the control of unit Reactance Closed Loop, control algolithm adopts proportional integral (PI control) algorithm of knowing in the industry.
The method of traditional calculations reactive power is as follows:
At first calculate instantaneous reactive power,
To instantaneous power q integration within a week, again divided by T, and get final product
In the formula, q is instantaneous reactive power,
U, I are voltage, current effective value,
Q is reactive power,
T is the sampling period.
Recycle the approximate expression of the calculating of three phase reactive power, obtain the reactive power of three-phase line, namely
In the formula:
Be U
AbAnd I
cBetween angle,
Be U
BcAnd I
cBetween angle.
Above-mentioned algorithm lay special stress on three-phase circuit must be a balancing circuitry, otherwise result of calculation can be brought certain error.And the wattless power measurement error in the cycle, can occur accumulation at certain hour, requires in the wind energy turbine set reactive power/voltage control under the condition of fast response, final impact control voltage effect.
Reactive power calculating method of the present utility model adopts PT and CT to gather the voltage and current of three-phase line, to the electric current of same phase, gets the voltage of same phase, and electric current shifts to an earlier date 1/4 periodic sampling than voltage, and computing formula is:
Wherein, U
a, I
a, U
b, I
b, U
c, I
cBe respectively voltage, the current effective value of each circuitry phase in the wind farm grid-connected some three-phase circuit that collects, T is the sampling period.
In PT and CT measurement links, what adopt in this patent is the electronic measurements method---the time-domain digital phase-shifting method, after synchronized sampling is finished, discrete series to two kinds of signals obtaining, then the electric current discrete series is shifted to an earlier date (or hysteresis) the translation T/4 cycle (corresponding 90 ° of phase shifts), do integral operation with voltage signal again.
Wind farm grid-connected some electric current of the present utility model and voltage signal sampling cycle can be at 1ms---in the 1s scope.See also shown in Figure 2, at the measurement initial stage, the sampling period of measuring equipment is when being set to 1s, the wind farm grid-connected some reactive power that obtains---main transformer high pressure Q(blue curve) output of curve calculation value is unstable, larger measure error fluctuation is arranged, and directly control procedure is regulated in impact.
Please cooperate consult shown in Figure 3, in the later stage, measuring equipment electric current and voltage signal sampling time are brought up to 1ms, according to the wind farm grid-connected some reactive power that obtains---main transformer high pressure Q(blue curve) curve, the idle process of wind-powered electricity generation unit is regulated rapidly and is finished main transformer high-pressure side reactive power, arrive to regulate target 0Kvar(control dead band and be ± 200Kvar), and whole process and site reactive power---main transformer high pressure Q(blue curve) output smoothing, the disappearance of fluctuation situation.
As seen, the utility model is by improving the sample frequency to PCC point PT transducer and CT sensor die analog signal, but the precision of Effective Raise voltage and current signal avoids gathering the error of link.
Centralized reactive-load compensation equipment does not drop into before the wind-powered electricity generation unit commitment, after the idle adjusting of wind-powered electricity generation unit steadily, centralized reactive-load compensation equipment drops into again, thereby can reduce to greatest extent the input capacity of the centralized reactive-load compensation equipment of wind energy turbine set, and reduces the running wastage of equipment.
The utility model provides a kind of control model based on the unit reactive power, and the wind-powered electricity generation unit is as a reference idle based on whole wind energy turbine set or unit main transformer step-up side, realizes the control of unit Reactance Closed Loop.Each separate unit wind-powered electricity generation unit all is cores of wind field AQC system in the wind field, realizes the wind energy turbine set constant power factor by the control strategy that breaks the whole up into parts, and is equivalent to the wind-powered electricity generation unit and has possessed wind energy turbine set AQC function.Wind-powered electricity generation unit self consists of closed-loop control, and master control participates in whole wind energy turbine set or the idle adjusting of unit main transformer step-up side, and the blower fan primary control program contains closed-loop adjustment controller and software algorithm.
The above; it only is preferred embodiment of the present utility model; be not that the utility model is done any pro forma restriction, those skilled in the art utilize the technology contents of above-mentioned announcement to make a little simple modification, equivalent variations or modification, all drop in the protection range of the present utility model.
Claims (7)
1. the idle regulating system of wind-powered electricity generation unit based on wind energy turbine set AQC is characterized in that comprising grid power system, booster stations supervisory control system, fan monitoring system and wind farm grid-connected some wattless power measurement device, wherein:
Communication connects between grid power system, booster stations supervisory control system, wind farm grid-connected some wattless power measurement device and the fan monitoring system.
2. the idle regulating system of wind-powered electricity generation unit based on wind energy turbine set AQC according to claim 1 is characterized in that the communication of described booster stations supervisory control system is connected with centralized reactive-load compensation equipment.
3. the idle regulating system of wind-powered electricity generation unit based on wind energy turbine set AQC according to claim 2 is characterized in that described centralized reactive-load compensation equipment is SVC or SVG.
4. the idle regulating system of wind-powered electricity generation unit based on wind energy turbine set AQC according to claim 2, it is characterized in that adopting international ethernet communication agreement between described grid power system, booster stations supervisory control system and the fan monitoring system, adopt the RS232/RS485 communications protocol between booster stations supervisory control system and the centralized reactive-load compensation equipment.
5. the idle regulating system of wind-powered electricity generation unit based on wind energy turbine set AQC according to claim 1 is characterized in that described fan monitoring system also is connected with capacitance group and/or reactor.
6. the idle regulating system of wind-powered electricity generation unit based on wind energy turbine set AQC according to claim 1 is characterized in that:
Described wind farm grid-connected some wattless power measurement device is by the server host of RS232 serial communication circuit connecting fan supervisory control system;
Described wind farm grid-connected some wattless power measurement device reads wind farm grid-connected reactive power information after unpacking by Modbus serial data message.
7. the idle regulating system of wind-powered electricity generation unit based on wind energy turbine set AQC according to claim 1 is characterized in that described wind farm grid-connected some wattless power measurement device adopts high accuracy electric energy quality module collection signal.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001236A (en) * | 2012-11-16 | 2013-03-27 | 国电联合动力技术有限公司 | Wind turbine generator reactive power regulation method and system based on air quenching cooler (AQC) of wind power plant |
| CN103997045A (en) * | 2014-05-30 | 2014-08-20 | 中国能源建设集团广东省电力设计研究院 | Configuration method and system for reactive power compensation of wind power plant |
| CN104165689A (en) * | 2014-08-26 | 2014-11-26 | 国电联合动力技术有限公司 | Yaw noise detection method and device of wind turbine generator |
| CN104795825A (en) * | 2015-05-11 | 2015-07-22 | 重庆大学 | Method for configuring capacity of asynchronous wind power plant reactive power compensation device under grid fault |
| CN107221952A (en) * | 2017-06-14 | 2017-09-29 | 河北工业大学 | A kind of adjustable controllable wind farm group boosting collects station system |
-
2012
- 2012-11-16 CN CN2012206095336U patent/CN202917983U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103001236A (en) * | 2012-11-16 | 2013-03-27 | 国电联合动力技术有限公司 | Wind turbine generator reactive power regulation method and system based on air quenching cooler (AQC) of wind power plant |
| CN103997045A (en) * | 2014-05-30 | 2014-08-20 | 中国能源建设集团广东省电力设计研究院 | Configuration method and system for reactive power compensation of wind power plant |
| CN104165689A (en) * | 2014-08-26 | 2014-11-26 | 国电联合动力技术有限公司 | Yaw noise detection method and device of wind turbine generator |
| CN104165689B (en) * | 2014-08-26 | 2017-02-22 | 国电联合动力技术有限公司 | Yaw noise detection method and device of wind turbine generator |
| CN104795825A (en) * | 2015-05-11 | 2015-07-22 | 重庆大学 | Method for configuring capacity of asynchronous wind power plant reactive power compensation device under grid fault |
| CN104795825B (en) * | 2015-05-11 | 2016-10-05 | 重庆大学 | Asynchronous Reactive Compensation in Wind Farm place capacity collocation method under electric network fault |
| CN107221952A (en) * | 2017-06-14 | 2017-09-29 | 河北工业大学 | A kind of adjustable controllable wind farm group boosting collects station system |
| CN107221952B (en) * | 2017-06-14 | 2019-05-31 | 河北工业大学 | A kind of adjustable controllable wind farm group boosting collects station system |
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Granted publication date: 20130501 |
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