CN103915848A - Regulation and control method for double-fed wind power plant reactive power control - Google Patents
Regulation and control method for double-fed wind power plant reactive power control Download PDFInfo
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- CN103915848A CN103915848A CN201410003935.5A CN201410003935A CN103915848A CN 103915848 A CN103915848 A CN 103915848A CN 201410003935 A CN201410003935 A CN 201410003935A CN 103915848 A CN103915848 A CN 103915848A
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- double
- fan motor
- fed fan
- control
- idle
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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
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Abstract
The invention provides a regulation and control method for double-fed wind power plant reactive power control. A double-fed wind power plant reactive power control system comprises an outer ring system, a middle ring system and an inner ring system, and the following relations are established, an instruction reference value (please see the formula in the specification) needing to be regulated for a wind power plant to respond to a regulation instruction of a power grid scheduling center is calculated through the outer ring system; the input quantity of the middle ring system is set as an instruction reference value (please see the formula in the specification) of the outer ring system, the output quantities are reactive power reference values (please see the formulae in the specification) of n double-fed wind generation sets, the feedback quantities are the sum of actual reactive power values (please see the formulae in the specification) of the n double-fed wind generation sets, and the formula (please see the formula in the specification) is an actual reactive power generation value of the ith double-fed wind generation set; the input quantities of the inner ring system are set as output reference values (please see the formulae in the specification) of the middle ring system, the output quantities and the feedback quantities are actual reactive power generation values (please see the formulae in the specification) of all the double-fed wind generation sets, and a closed loop system is formed.
Description
Technical field
The invention belongs to field of power system control, the idle control parameter of the double-fed fan motor field especially forming for large-scale double-fed fan motor unit regulates and controls.
Background technology
Day by day exhausted and environmental problem day by day serious today in resource, 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, there are all kinds of blower fan large area off-grid accidents 43 times in wind-powered electricity generation base, Jiuquan wind energy turbine set accumulative total 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 cause of this type of accident is mainly that not possess the first-class equipment quality of cable of wind energy turbine set of fault ride-through capacity poor, cause reason that accident sharply expands for the reactive power compensator in wind energy turbine set can not be correctly, quick acting causes voltage further to worsen.
Lack the wind-powered electricity generation of reasonable idle control measure extensive grid-connected after, 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 energy turbine set reactive power/voltage control technology, research at present, in the starting stage, not yet forms theory and the method for a cover system, and correlation engineering application is also less, lag behind the progress of reactive power compensation technology far away, become the major obstacle that solves wind-powered electricity generation reactive voltage problem.Therefore, set up wind farm group powerless control system, idle schedulability, the controllability that strengthens wind-powered electricity generation is the most important and urgent problem of reactive voltage problem after solution wind-electricity integration.
Summary of the invention
In sum, the necessary regulate and control method that a kind of idle control parameter that can rationally control wind energy turbine set reactive voltage is provided.
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 turbine group key-course, and described wind-powered electricity generation key-course, group of planes key-course and double-fed fan motor unit key-course form respectively the outer loop systems of described double-fed fan motor field powerless control system, middle loop systems and interior loop systems; Annexation between described outer loop systems, middle loop systems and interior loop systems is set up in the following manner: the instruction references value of (a) utilizing the required adjustment of regulating command that outer shroud system-computed wind energy turbine set is responsive electricity grid control centre
; (b) the instruction references value that in setting, the input variable of loop systems is outer loop systems
, 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 platform double-fed fan motor unit; (c) set the output reference value that interior loop systems input variable is middle loop systems
, output variable and feedback quantity are the idle occurrence value of the reality of each double-fed fan motor unit
form a closed-loop system.
With respect to prior art, the regulate and control method of the idle control in double-fed fan motor provided by the invention field, control parameter by coordination, 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, has overcome 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 provided by the invention field powerless control system.
Fig. 2 be in the powerless control system of double-fed fan motor field shown in Fig. 1 in loop systems and interior loop systems be related to schematic diagram.
Embodiment
Below according to Figure of description and in conjunction with specific embodiments to the further regulate and control method of the detailed statement idle control in double-fed fan motor field of technical scheme of the present invention.Describe for aspect, it is a kind of for controlling the double-fed fan motor field powerless control system of wind energy turbine set reactive apparatus that first the present invention provides.
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 turbine group key-course.Described wind-powered electricity generation key-course, group of planes key-course and double-fed fan motor unit key-course form respectively the outer loop systems of described double-fed fan motor field powerless control system, middle loop systems and interior loop systems.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 key-course can be double-fed fan motor unit.
If the control cycle of outer loop systems, middle loop systems and interior loop systems 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 key-course, 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, the annexation between described outer loop systems, middle loop systems and interior loop systems is set up in the following manner:
(a) utilize the instruction references value of the required adjustment of regulating command that outer shroud system-computed wind energy turbine set is responsive electricity grid control centre
;
(b) the instruction references value that in setting, the input variable of loop systems is outer loop systems
, 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, 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 platform 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) set the output reference value that interior loop systems input variable is middle loop systems
, output variable and feedback quantity are the idle occurrence value of the reality of each double-fed fan motor unit
form a closed-loop system.
The calculative instruction references value of described outer loop systems
can calculate in the following manner:
(4)
In formula
the currency that represents all double-fed fan motor units of wind energy turbine set institute output reactive power sum, unit is Mvar;
be illustrated in the increment size that needs adjusting on currency basis, unit is Mvar.
Described increment size
can calculate in the following manner:
If the regulating command of grid dispatching center is voltage increment
, unit is kV, described increment size can calculate by formula (5);
(5)
In formula
for wind-powered electricity generation unit collection bus voltage, unit is kV, can obtain by actual measurement;
for wind energy turbine set is sent line impedance, unit is
, be intrinsic parameter.
Further, described increment size
also can calculate by the following method:
If the regulating command of grid dispatching center is idle increment
, described increment size
calculate by formula (6):
（6）
In formula
for wind-powered electricity generation unit 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 control parameter of described middle loop systems comprises PI control coefrficient
,
and the proportionality coefficient of reactive power between many double-fed fan motor units
,
...,
.The control task of described middle loop systems is the instruction references value that closed loop is followed the tracks of double-fed fan motor group of planes reactive power
, and the reference value of each double-fed fan motor unit reactive power of coefficient adjustment proportionally.All dimensionless of these parameters.Control parameter and the proportionality coefficient of described middle loop systems can be set in the following manner:
(1)
,
press the damping coefficient of I type control system
choose.
PI controller parameter is designed to the common-sense method in classical control theory, reaches " Theory of Automatic Control basis ", the .1991 of publishing house of Tsing-Hua University first edition .237-250 with reference to wearing loyalty.
(2) determine proportionality coefficient according to the multiple idle principle of adjustable idle double-fed fan motor unit of exerting oneself large.
Concrete, establish i platform double-fed fan motor unit adjustable idle exert oneself into
, be its maximum reactive capability
deduct its current idle exerting oneself
, that is:
(7)
The distribution coefficient of the deviation reactive power of i platform double-fed fan motor unit
be defined as:
(8)
Described interior loop systems is the double-fed fan motor unit reactive power reference qref that in following the tracks of, loop systems issues
because the idle control of described double-fed fan motor unit is based on, line measurement realizes, therefore can be by introducing reference value based on double-fed fan motor unit reactive power and the closed loop feedback control mode of actual value deviation, control in implementation procedure to eliminate idle being controlled at of double-fed fan motor unit, due to the error measuring or the link such as calculating causes, and control the speed of response of double-fed fan motor unit reactive power.Described interior loop systems need to be definite parameter 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 provided by the invention field, by coordinating each 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, and distribute idle control requirement to every double-fed blower fan according to available reactive capability, and by the outside individual features design separate unit control strategy 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 many double-fed fan motor units, the idle allocative decision of single double-fed fan motor unit inside, the double-fed fan motor field that reaches On-line Control is being accepted after control command, the effect that response idle adjustment in fast and reliable ground requires.
The idle control strategy easy operating of double-fed fan motor machine group proposed by the invention, there is universality, be not limited to specific double-fed fan motor machine group, be all suitable for for the double-fed fan motor machine group of any direct access public electric wire net.
In addition, those skilled in the art also can do other and change in spirit of the present invention, and these variations of doing according to spirit of the present invention certainly, all should be included in the present invention's scope required for protection.
Claims (10)
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 turbine group key-course, and described wind-powered electricity generation key-course, group of planes key-course and double-fed fan motor unit key-course form respectively the outer loop systems of described double-fed fan motor field powerless control system, middle loop systems and interior loop systems;
Annexation between described outer loop systems, middle loop systems and interior loop systems is set up in the following manner:
(a) utilize the instruction references value of the required adjustment of regulating command that outer shroud system-computed wind energy turbine set is responsive electricity grid control centre
;
(b) the instruction references value that in setting, the input variable of loop systems is outer loop systems
, 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 platform double-fed fan motor unit;
(c) set the output reference value that interior loop systems input variable is middle loop systems
, output variable and feedback quantity are the idle occurrence value of the reality of each double-fed fan motor unit
form a closed-loop system.
2. the regulate and control method of the idle control in double-fed fan motor as claimed in claim 1 field, is characterized in that, the control cycle of establishing outer loop systems, middle loop systems and interior loop systems is respectively
,
,
, described in
,
,
between relation meet:
(1)；
(2)。
3. the regulate and control method of the idle control in double-fed fan motor as claimed in claim 1 field, is characterized in that, the calculative instruction references value of described outer loop systems
calculate in the following manner:
；
In formula
the currency that represents all double-fed fan motor units of wind energy turbine set institute output reactive power sum, unit is Mvar;
be illustrated in the increment size that needs adjusting on currency basis, unit is Mvar.
4. the regulate and control method of the idle control in double-fed fan motor as claimed in claim 3 field, is characterized in that, described increment size
calculate in the following manner:
If the regulating command of grid dispatching center is voltage increment
, unit is kV, described increment size
for:
；
In formula
for double-fed fan motor unit collection bus voltage, unit is kV;
for wind energy turbine set is sent line impedance, unit is
.
5. the regulate and control method of the idle control in double-fed fan motor as claimed in claim 3 field, is characterized in that, described increment size
calculate in the following manner:
If the regulating command of grid dispatching center is idle increment
, described increment size
for:
；
In formula
for double-fed fan motor unit collection bus voltage, unit is kV;
for the short-circuit voltage of wind energy turbine set step-up transformer, unit is kV.
6. the regulate and control method of the idle control in double-fed fan motor as claimed in claim 1 field, is characterized in that, by adoption rate integral control strategy, and according to
the distribution coefficient of the deviation reactive power of platform double-fed fan motor unit
, adjust the reference value of each double-fed fan motor unit reactive power.
7. the regulate and control method of the idle control in double-fed fan motor as claimed in claim 1 field, is characterized in that, the control parameter of described middle loop systems comprises proportional plus integral control policy control coefficient
,
and the proportionality coefficient of reactive power between many double-fed fan motor units
,
...,
, set in the following manner:
(1)
,
press the damping coefficient of I type control system
choose;
(2) determine proportionality coefficient according to the multiple idle principle of adjustable idle double-fed fan motor unit of exerting oneself large.
8. the regulate and control method of the idle control in double-fed fan motor as claimed in claim 7 field, is characterized in that, establishes adjustable idle the exerting oneself of i platform double-fed fan motor unit
for its maximum reactive capability
deduct its current idle exerting oneself
, that is:
;
The distribution coefficient of the deviation reactive power of i platform double-fed fan motor unit
be defined as:
。
9. the regulate and control method of the idle control in double-fed fan motor as claimed in claim 1 field, is characterized in that, the closed loop transfer function, of the idle control of double-fed fan motor unit in described interior loop systems
calculate in the following manner:
；
In formula
for the responsive time constant of double-fed fan motor unit.
10. the regulate and control method of the idle control in double-fed fan motor as claimed in claim 1 field, it is characterized in that, described wind energy turbine set key-course and be that the actuating equipment of team control preparative layer is automatic voltage control system software, the actuating equipment of described double-fed fan motor unit key-course is double-fed fan motor unit.
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|---|---|---|---|
| CN201410003935.5A CN103915848B (en) | 2014-01-06 | 2014-01-06 | The regulate and control method of control that double-fed fan motor field is idle |
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|---|---|---|---|
| CN201410003935.5A CN103915848B (en) | 2014-01-06 | 2014-01-06 | The regulate and control method of control that double-fed fan motor field is idle |
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|---|---|
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| CN103915848B CN103915848B (en) | 2016-03-30 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104767205A (en) * | 2015-01-29 | 2015-07-08 | 国家电网公司 | Method for establishing automatic generation control system of electric power system based on wind power plant access |
| CN105515014A (en) * | 2014-09-22 | 2016-04-20 | 国家电网公司 | Wind farm integrated reactive power control system based on protection action information and control method thereof |
| 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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012028150A2 (en) * | 2010-08-31 | 2012-03-08 | Vestas Wind Systems A/S | Control of electric output of a wind park |
| 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 |
-
2014
- 2014-01-06 CN CN201410003935.5A patent/CN103915848B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012028150A2 (en) * | 2010-08-31 | 2012-03-08 | Vestas Wind Systems A/S | Control of electric output of a wind park |
| 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 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515014A (en) * | 2014-09-22 | 2016-04-20 | 国家电网公司 | Wind farm integrated reactive power control system based on protection action information and control method thereof |
| 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 |
| CN104767205A (en) * | 2015-01-29 | 2015-07-08 | 国家电网公司 | Method for establishing automatic generation control system of electric power system based on wind power plant access |
| 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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| Publication number | Publication date |
|---|---|
| CN103915848B (en) | 2016-03-30 |
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