CN103915848B - The regulate and control method of control that double-fed fan motor field is idle - Google Patents

The regulate and control method of control that double-fed fan motor field is idle Download PDF

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CN103915848B
CN103915848B CN201410003935.5A CN201410003935A CN103915848B CN 103915848 B CN103915848 B CN 103915848B CN 201410003935 A CN201410003935 A CN 201410003935A CN 103915848 B CN103915848 B CN 103915848B
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double
fan motor
fed fan
control
idle
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CN103915848A (en
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乔颖
鲁宗相
王兴刚
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Grid Planning Research Center Yunnan Grid Co ltd
Beijing Yongtai Yicheng Chemical Technology Co ltd
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Grid Planning Research Center Yunnan Grid Co ltd
Beijing Yongtai Yicheng Chemical Technology Co ltd
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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
    • 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

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  • Control Of Eletrric Generators (AREA)

Abstract

The invention provides the regulate and control method of the idle control appliance in a kind of double-fed fan motor field, does one double-fed wind energy turbine set powerless control system comprise an outer ring system, middle loop systems and inner ring system, and sets up following relation: utilize the instruction references value that outer ring system calculating wind energy turbine set adjusts needed for the regulating command of responsive electricity grid control centre ; In setting, the input variable of loop systems is the instruction references value of outer ring system , output variable is the reference value of n platform double-fed fan motor unit reactive power , feedback quantity is the actual reactive power value sum of n platform double-fed fan motor unit: , in formula it is the idle occurrence value of reality of i-th double-fed fan motor unit; Setting inner ring system input variable is the output reference value of middle loop systems , output variable and feedback quantity are the idle occurrence value of reality of each double-fed fan motor unit form a closed-loop system.

Description

The regulate and control method of control that double-fed fan motor field is idle
Technical field
The invention belongs to field of power system control, the idle controling parameters especially for the double-fed fan motor field of large-scale double-fed fan motor unit formation regulates and controls.
Background technology
In today that resource is day by day exhausted and environmental problem is day by day serious, in order to keep the sustainable development of the economy of energy, wind energy is by large-scale development.After but large-scale wind power is grid-connected, blower fan large area off-grid Frequent Accidents.According to Gansu Power Company statistics, 24 days to 2011 February in 2011, Jiuquan wind power base wind energy turbine set is accumulative there are all kinds of blower fan large area off-grid accident 43 times by the end of April.And also successively repeatedly there is blower fan large area off-grid accident in the ground such as the Inner Mongol, Jilin faster in Wind Power Development.According to initial analysis, the first-class equipment quality of cable that the cause of this type of accident does not mainly possess the wind energy turbine set of fault ride-through capacity is poor, the reason causing accident sharply to expand then for the reactive power compensator in wind energy turbine set can not correctly, quick acting causes voltage to worsen further.
After lacking the wind-powered electricity generation large-scale grid connection of reasonable idle control measure, directly threaten the safety and economic operation of electrical network, the reactive voltage problem after wind-electricity integration has become a bottleneck of restriction Wind Power Development.For wind power plant reactive voltage control technology, current research is in the starting stage, not yet forms the Theories and methods of set of system, and correlation engineering application is also less, lag behind the progress of reactive power compensation technology far away, become the major obstacle solving wind-powered electricity generation reactive voltage problem.Therefore, set up wind farm group powerless control system, strengthen the idle schedulability of wind-powered electricity generation, controllability is the problem that after solution wind-electricity integration, reactive voltage problem is the most important and urgent.
Summary of the invention
In sum, necessary provide a kind of can the regulate and control method of idle controling parameters of conservative control wind power plant reactive voltage.
The regulate and control method of the idle control in a kind of double-fed fan motor field, comprise a double-fed wind energy turbine set powerless control system, described double-fed fan motor field powerless control system comprises a wind energy turbine set key-course, a group of planes key-course and a double-fed Wind turbines key-course, and described wind-powered electricity generation key-course, group of planes key-course and double-fed fan motor unit allocation layer form the outer ring system of described double-fed fan motor field powerless control system, middle loop systems and inner ring system respectively; Described outer ring system, annexation between middle loop systems and inner ring system are set up in the following manner: the instruction references value that (a) utilizes outer ring system to calculate wind energy turbine set to adjust needed for the regulating command of responsive electricity grid control centre ; B in () setting, the input variable of loop systems is the instruction references value of outer ring system , output variable is the reference value of n platform double-fed fan motor unit reactive power , feedback quantity is the actual reactive power value sum of n platform double-fed fan motor unit: , in formula it is the idle occurrence value of reality of i-th double-fed fan motor unit; C () setting inner ring system input variable is the output reference value of middle loop systems , output variable and feedback quantity are the idle occurrence value of reality of each double-fed fan motor unit form a closed-loop system.
Relative to prior art, the regulate and control method of the idle control in double-fed fan motor field provided by the invention, by cooperation control parameter, according to the multiple idle principle of adjustable idle double-fed blower fan of exerting oneself large, by adopting three layers of control structure, every layer adopts different control strategies, overcomes the present situation that the existing idle adjustment in large-scale double-fed fan motor field is inharmonious, control procedure stability is not high, response speed is slow.
Accompanying drawing explanation
Fig. 1 is the structural representation of double-fed fan motor field provided by the invention powerless control system.
The relation schematic diagram that Fig. 2 is loop systems in the powerless control system of the field of double-fed fan motor shown in Fig. 1 and inner ring system.
Embodiment
Also in conjunction with specific embodiments technical scheme of the present invention is stated further in detail to the regulate and control method of the idle control in double-fed fan motor field below according to Figure of description.For aspect describes, first the present invention provides a kind of double-fed fan motor field powerless control system for controlling wind energy turbine set reactive apparatus.
See also Fig. 1 and Fig. 2, the double-fed fan motor field powerless control system that first embodiment of the invention provides comprises a wind energy turbine set key-course, a group of planes key-course and a double-fed Wind turbines key-course.Described wind-powered electricity generation key-course, group of planes key-course and double-fed fan motor unit allocation layer form the outer ring system of described double-fed fan motor field powerless control system, middle loop systems and inner ring system respectively.Described wind energy turbine set key-course and be that the actuating equipment of team control preparative layer all can be automatic voltage control system software, the actuating equipment of described double-fed fan motor unit allocation layer can be double-fed fan motor unit.
If the control cycle of outer ring system, middle loop systems and inner ring system is respectively , , .For avoiding occurring reforming phenomena between wind energy turbine set key-course, group of planes key-course and double-fed fan motor unit allocation layer, the instruction cycle of each control ring should have significant difference, described in , , between relation meet:
(1)
(2)
In the present embodiment, .
See also Fig. 2, described outer ring system, annexation between middle loop systems and inner ring system are set up in the following manner:
A instruction references value that () utilizes outer ring system calculating wind energy turbine set to adjust needed for the regulating command of responsive electricity grid control centre ;
B in () setting, the input variable of loop systems is the instruction references value of outer ring system , output variable is the reference value (n is wind electric field blower number of units) of n platform double-fed fan motor unit reactive power , feedback quantity is the actual reactive power value sum of n platform double-fed fan motor unit, then the reactive power Q of described double-fed fan motor machine group d Σfor:
(3)
In formula it is the idle occurrence value of reality of i-th double-fed fan motor unit.
Further, by adoption rate integral control strategy (Proportional-Integral is abbreviated as PI), and proportionally coefficient ( , ..., , the the distribution coefficient of the deviation reactive power of platform double-fed fan motor unit (DFIG) ), adjust the reference value of each double-fed fan motor unit reactive power.
C () setting inner ring system input variable is the output reference value of middle loop systems , output variable and feedback quantity are the idle occurrence value of reality of each double-fed fan motor unit form a closed-loop system.
The calculative instruction references value of described outer ring system by calculating with under type:
(4)
In formula represent the currency of wind energy turbine set all double-fed fan motor unit institutes output reactive power sum, unit is Mvar; represent the increment size needing to regulate on currency basis, unit is Mvar.
Described increment size by calculating with under type:
If the regulating command of grid dispatching center is voltage increment , unit is kV, then described increment size can calculate by formula (5);
(5)
In formula for Wind turbines collection bus voltage, unit is kV, can be obtained by actual measurement; for wind energy turbine set sends line impedance, unit is , be intrinsic parameter.
Further, described increment size also calculate by following methods:
If the regulating command of grid dispatching center is idle increment , then described increment size calculate by formula (6):
（6）
In formula for Wind turbines collection bus voltage, unit is kV; for the short-circuit voltage of wind energy turbine set step-up transformer, unit is kV, is provided by transformer nameplate.
The controling parameters of described middle loop systems comprises PI control coefrficient , and the proportionality coefficient of reactive power between multiple stage double-fed fan motor unit , ..., .The control task of described middle loop systems is the instruction references value of Closed loop track double-fed fan motor group of planes reactive power , and the reference value of proportionally coefficient adjustment each double-fed fan motor unit reactive power.These parameters all dimensionless.The controling parameters of described middle loop systems and proportionality coefficient are by setting with under type:
(1) , by the damping coefficient of I type control system choose.
PI controller parameter is designed to the common-sense method in classical control theory, reaches with reference to wearing loyalty, " Theory of Automatic Control basis ", publishing house of Tsing-Hua University .1991 first edition .237-250.
(2) according to the multiple idle principle determination proportionality coefficient of adjustable idle double-fed fan motor unit of exerting oneself large.
Concrete, if i-th double-fed fan motor unit adjustable idle exert oneself into , be its maximum reactive capability deduct it currently idlely to exert oneself , that is:
(7)
The then distribution coefficient of the deviation reactive power of i-th double-fed fan motor unit be defined as:
(8)
Described inner ring system is the double-fed fan motor unit reactive power reference qref that in following the tracks of, loop systems issues idle control due to described double-fed fan motor unit is based on line measurement to realize, therefore by introducing based on the reference value of double-fed fan motor unit reactive power and the closed loop feedback control mode of actual value deviation, to eliminate, double-fed fan motor unit is idle to be controlled in control realization process, due to the error that the links such as measurement or calculating cause, and control the speed of response of double-fed fan motor unit reactive power.Described inner ring system needs the parameter determined to be the closed loop transfer function, of the idle control of double-fed fan motor unit , this parameter can obtain by experiment, also can estimate according to the formula of reduction of formula (9):
In formula for the responsive time constant of double-fed fan motor unit, span is .
The regulate and control method of the idle control in double-fed fan motor field provided by the invention, by coordinating each controling parameters, according to the multiple idle principle of adjustable idle double-fed blower fan of exerting oneself large, by adopting three layers of control structure, every layer adopts different control strategies, and distribute idle control overflow to every platform double-fed blower fan according to available reactive capability, and design separate unit control strategy by the outside individual features of double-fed blower fan, overcome the existing idle adjustment in large-scale double-fed fan motor field inharmonious, control procedure stability is not high, the present situation that response speed is slow, provide between the inner multiple reactive-load compensation equipment of wind energy turbine set, between multiple stage double-fed fan motor unit, the idle allocative decision of single double-fed fan motor unit inside, reach the double-fed fan motor field of On-line Control after accepting control command, the effect that adjustment that the response of fast and reliable ground is idle requires.
The idle control strategy of double-fed fan motor machine group proposed by the invention is easy to operation, has universality, and be not limited to specific double-fed fan motor machine group, the double-fed fan motor machine group for any direct access public electric wire net is all applicable.
In addition, those skilled in the art also can do other change in spirit of the present invention, and these changes done according to the present invention's spirit, all should be included in the present invention's scope required for protection certainly.

Claims (9)

1. the regulate and control method of the idle control in double-fed fan motor field, comprise a double-fed wind energy turbine set powerless control system, described double-fed fan motor field powerless control system comprises a wind energy turbine set key-course, a group of planes key-course and a double-fed Wind turbines key-course, and described wind energy turbine set key-course, group of planes key-course and double-fed fan motor unit allocation layer form the outer ring system of described double-fed fan motor field powerless control system, middle loop systems and inner ring system respectively;
Described outer ring system, annexation between middle loop systems and inner ring system are set up in the following manner:
A instruction references value that () utilizes outer ring system calculating wind energy turbine set to adjust needed for the regulating command of responsive electricity grid control centre
B in () setting, the input variable of loop systems is the instruction references value of outer ring system output variable is the reference value of n platform double-fed fan motor unit reactive power feedback quantity is the actual reactive power value sum of n platform double-fed fan motor unit: q in formula diit is the idle occurrence value of reality of i-th double-fed fan motor unit;
C () setting inner ring system input variable is the output reference value of middle loop systems output variable and feedback quantity are the idle occurrence value Q of reality of each double-fed fan motor unit d1, Q d2... Q dnform a closed-loop system;
If the control cycle of outer ring system, middle loop systems and inner ring system is respectively T 1, T 2, T 3, described T 1, T 2, T 3between relation meet:
T 1>5T 2(1)；
T 2>5T 3(2)。
2. the regulate and control method of the idle control in double-fed fan motor field as claimed in claim 1, is characterized in that, the calculative instruction references value of described outer ring system calculate in the following manner:
Q d Σ r e f = Q 0 + ΔQ d Σ r e f ;
Q in formula 0represent the currency of wind energy turbine set all double-fed fan motor unit institutes output reactive power sum, unit is Mvar; represent the increment size needing to regulate on currency basis, unit is Mvar.
3. the regulate and control method of the idle control in double-fed fan motor field as claimed in claim 2, is characterized in that, described increment size calculate in the following manner:
If the regulating command of grid dispatching center is voltage increment Δ U, unit is kV, then described increment size for:
ΔQ d Σ r e f ≈ Δ U · U t u r X t r a n s ;
U in formula turfor double-fed fan motor unit collection bus voltage, unit is kV; X transfor wind energy turbine set sends line impedance, unit is Ω.
4. the regulate and control method of the idle control in double-fed fan motor field as claimed in claim 2, is characterized in that, described increment size calculate in the following manner:
If the regulating command of grid dispatching center is idle increment Delta Q, then described increment size for:
ΔQ d Σ r e f ≈ Δ Q / ( 1 - 2 Q 0 U t u r 2 X T ) ;
U in formula turfor double-fed fan motor unit collection bus voltage, unit is kV; X tfor the short-circuit voltage of wind energy turbine set step-up transformer, unit is kV.
5. the regulate and control method of the idle control in double-fed fan motor field as claimed in claim 1, is characterized in that, by adoption rate integral control strategy, and the distribution coefficient D of deviation reactive power according to i-th double-fed fan motor unit i, adjust the reference value of each double-fed fan motor unit reactive power.
6. the regulate and control method of the idle control in double-fed fan motor field as claimed in claim 1, it is characterized in that, the controling parameters of described middle loop systems comprises proportional plus integral control policy control coefficient and the proportionality coefficient D of reactive power between multiple stage double-fed fan motor unit 1, D 2..., D n, set in the following manner:
(1) choose by damping coefficient ξ=0.707;
(2) according to the multiple idle principle determination proportionality coefficient of adjustable idle double-fed fan motor unit of exerting oneself large.
7. the regulate and control method of the idle control in double-fed fan motor field as claimed in claim 6, is characterized in that, if the adjustable idle of i-th double-fed fan motor unit is exerted oneself for its maximum reactive capability deduct its current idle Q that exerts oneself di, that is: Q d i c = Q d i max - Q d i ;
The then distribution coefficient D of the deviation reactive power of i-th double-fed fan motor unit ibe defined as:
D i = Q d i c / Σ i = 1 n Q d i c .
8. the regulate and control method of the idle control in double-fed fan motor field as claimed in claim 1, is characterized in that, the closed loop transfer function, of the idle control of double-fed fan motor unit in described inner ring system calculate in the following manner:
G d i Q ( s ) = 1 T i s + 1 ;
T in formula ifor the responsive time constant of double-fed fan motor unit.
9. the regulate and control method of the idle control in double-fed fan motor field as claimed in claim 1, it is characterized in that, the actuating equipment of described wind energy turbine set key-course and group of planes key-course is automatic voltage control system software, and the actuating equipment of described double-fed fan motor unit allocation layer is double-fed fan motor unit.
CN201410003935.5A 2014-01-06 2014-01-06 The regulate and control method of control that double-fed fan motor field is idle Active CN103915848B (en)

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CN105515014B (en) * 2014-09-22 2018-05-29 国家电网公司 Wind power plant synthesis powerless control system and control method based on protection act information
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CN107017663A (en) * 2017-05-02 2017-08-04 国网四川省电力公司技能培训中心 It is a kind of to improve the control method that wind power plant accesses mains frequency stability

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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

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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

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