CN104795843A - Grid-connected wind power system with voltage stabilizing device and control method of grid-connected wind power system - Google Patents
Grid-connected wind power system with voltage stabilizing device and control method of grid-connected wind power system Download PDFInfo
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- 238000010248 power generation Methods 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 238000012544 monitoring process Methods 0.000 claims description 42
- 238000012545 processing Methods 0.000 claims description 4
- 230000002441 reversible effect Effects 0.000 claims description 4
- 230000005856 abnormality Effects 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 3
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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
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Abstract
The invention discloses a grid-connected wind power system with a voltage stabilizing device and a control method of the grid-connected wind power system. The grid-connected wind power system comprises wind power generation equipment, a voltage stabilizing device, a direct-current bus, an AC/DC bidirectional current conversion module I, an AC/DC bidirectional current conversion module II, a wind power generation system internal load and a monitoring device, wherein the AC/DC bidirectional current conversion module I is used for connecting the wind power generation equipment with the direct-current bus; the AC/DC bidirectional current conversion module II is used for connecting and isolating the direct-current bus from a large power grid. By adopting the grid-connected wind power system and the control method, the generated power of the wind power generation equipment can be predicted, the power and voltage change situation of a connected grid point can be tracked, a most appropriate control strategy can be made and implemented, the wind power system can rapidly and stably provide active power and reactive power according to requirements of the large power grid when grids are connected, the security of an energy storage device can be improved, and the service life of the energy storage device can be prolonged.
Description
Art
The present invention relates to a kind of grid connected wind power system and the control method thereof with voltage stabilizing device.
Background technology
Using the micro-capacitance sensor of wind-powered electricity generation and photovoltaic generation as superhigh pressure, the supplementing of remote, bulk power grid powering mode, represent the developing direction that electric power system is new.Wind energy and solar energy resources are clean regenerative resources, but there is the problem of randomness and fluctuation, bring a series of impact to electrical network.Along with the expanding day of electric power system scale, and country improves constantly the requirement that wind energy turbine set realizes full factory automatism voltage control (AVC) function.The original trend distribution of the fluctuation degree direct influence electrical network of voltage, when the permeability of wind power generation and photovoltaic generation is in higher level, fluctuation and randomness bring huge impact can to original operational mode of electrical network.
Energy storage technology and reactive power compensation technology have important realistic meaning to the realization that wind-powered electricity generation electricity generation system is incorporated into the power networks, it is applied in the voltage fluctuation and stochastic problems that solve wind power generation to a great extent, effectively improves the predictability in intermittent micro-source, certainty and economy.
But, the price comparison of configuration large-scale energy storage device and reactive power compensator is expensive, therefore, be necessary to consider power transmission engineering cost, energy storage device and reactive power compensator cost, transmission of electricity income, sets up and turns to target so that comprehensive benefit is maximum, the method for distributing rationally of given grid connected wind power system.
Summary of the invention
The invention provides a kind of grid connected wind power system and the control method thereof with voltage stabilizing device, the generated output of the measurable wind power plant of this grid connected wind power system and method, power that is traceable and also site and change in voltage situation, can formulate and implement optimum control strategy, ensure wind power system when grid-connected according to the demand of bulk power grid fast and active power and reactive power are steadily provided, and fail safe and the useful life of energy storage device can be promoted.
To achieve these goals, the invention provides a kind of grid connected wind power system with voltage stabilizing device, this system comprises: wind power plant, wind power plant, voltage stabilizing device, DC bus, the two-way change of current module one of AC/DC for being connected with DC bus by wind power plant, for the two-way change of current module two of AC/DC, wind generator system internal burden and the supervising device that are connected with bulk power grid by DC bus and isolate;
This voltage stabilizing device comprises battery module, the two-way DC/DC converter be connected with batteries by above-mentioned DC bus and SVG equipment;
This supervising device comprises:
Wind power generation generating equipment monitoring module, for monitoring wind power plant in real time, and predicts the generated output of wind power plant;
SVG monitoring of tools module, for monitoring SVG equipment in real time;
Batteries monitoring module, can monitor SOC and the DC/DC reversible transducer of batteries in real time;
Bulk power grid contact module, knows the ruuning situation of bulk power grid and relevant schedule information for real-time from bulk power grid regulation and control center;
Be incorporated into the power networks monitoring module, connects or isolation bulk power grid for controlling wind power system;
Load monitoring module, for the load in real-time wind power system;
Middle control module, for determining the operation reserve of wind power system, and sends instruction to each module in above-mentioned supervising device, to perform this operation reserve;
Bus module, for the liaison of the modules of this supervising device.
Preferably, described wind power plant monitoring module at least comprises wind power plant voltage, electric current and frequency detection equipment, wind speed measurement equipment.
Preferably, the service data of described wind power plant monitoring module Real-time Obtaining wind power plant, and store data.
Preferably, batteries monitoring module at least comprises accumulator voltage, electric current, SOC acquisition equipment and temperature testing equipment.
For achieving the above object, the present invention also provides a kind of control method of above-mentioned wind power system, and the method comprises the steps:
S1. wind power plant monitoring module Real-time Obtaining wind power plant service data, and store data;
S2. according to wind power plant, meritorious and idle prediction is exported to the wind power plant in following predetermined instant;
S3. the SOC obtaining battery module is detected in real time, Real-time Obtaining wind power system internal burden power demand conditions;
S4. the parameter of Real-time Obtaining bulk power grid and schedule information, prediction future time wind power system is gained merit and reactive requirement with bulk power grid tie point;
S5. using the SOC of the meritorious of wind power system and bulk power grid tie point and reactive requirement, current batteries to store energy, current for wind power system internal burden is meritorious and reactive requirement demand, following wind power plant export gain merit and reactive requirement as constraints, realize the optimizing operation of wind power grid.
Preferably, the power output of arbitrary wind-power generated power forecasting method prediction wind power plant in prior art is adopted in step s 2.
Preferably, optimizing operation is realized in the following way in step s 5:
S51. active power output mode is optimized, preferential use wind power plant to and site active power of output, when wind power plant active power surplus, excess power is absorbed by batteries, again the active power of wind power plant can not meet and there is a common demand site when, by batteries active power of output, thus realize the stable of the active voltage of also site;
S52. Optimal Reactive Power power mode output, the idle output of reasonable distribution wind power equipment and the idle output of SVG equipment, thus realize the stable of the reactive voltage of also site.
Preferably, described S52 specifically comprises the steps:
S521. will also be converted to as follows and site reactive power aggregate demand Q by site reactive power/voltage control magnitude of voltage X
w, and calculate Q
wreactive power deviation delta Q in the cycle of place
w:
Q
W＝kX
ΔQ
W＝Q
W-Q
Wlast
Wherein, k is conversion coefficient, Q
wlastfor Q
wthe reactive power aggregate demand that the upper one-period in place cycle calculates;
If S522. | Δ Q
w|≤| A
s(MA
sVG-YF
s)+(MA
t-YF
t) |, then to step S523; Otherwise to step S524;
Wherein:
A
sfor the state of a control of SVG, A
svalue 0 or 1,0 for not allow automatic control, and 1 controls automatically for allowing;
A
tfor the adjustable reactive power coefficient of current wind power equipment, A
tvalue [0,1], by wind power plant monitoring module by calculate whole wind power plant allow Reactive-power control capacity after plan and draw;
YF
sby SVG monitoring of tools module is sent out reactive power to the current SVG of middle control module feedback;
YF
tby wind power plant monitoring module is sent out reactive power to the current wind generating equipment of middle control module feedback;
MA
sVGfor the maximum permission reactive power of SVG; MA
tfor all wind power plants maximum permission reactive power sum;
S523, described middle control module is at Q
win the cycle of place, point three steps carry out the Q between SVG Reactive Power Control module and wind power plant reactive power coordinating control module
wdistribute, specific as follows:
When the first step is distributed, make Q
sVG=A
sq
w(1-0.2A
t); Now SVG is main Reactive-power control equipment, can ensure the response time regulated;
When second step distributes, make Q
sVG=A
sq
w(1-0.5A
t); Carrying out this step is that reactive power in order to be born by SVG shifts to wind power plant, for SVG leaves larger adjustment nargin;
When 3rd step is distributed, make Q
sVG=A
sq
w(1-0.8A
t); After performing this step, more reactive power will be had and born by blower fan unit, thus reserve enough reactive power pondagies for SVG;
Wherein, Q
t=Q
w-Q
sVG,
Q
sVGfor the reactive power of the current distribution of SVG, Q
tfor the reactive power that whole wind power plant distributes; Work as Q
tvalue is the negative reactive power then reducing SVG;
S524. abnormality processing:
According to the Input of SVG and wind power plant, at the reactive power upper and lower bound that line computation wind energy turbine set allows, as the Q calculated
wbe greater than the upper limit or be less than in limited time lower, locking reactive power/voltage control function.
Method for supervising tool of the present invention has the following advantages: the power output situation of change of (1) Accurate Prediction wind power plant; (2) control strategy is taken into account and is joined bulk power grid scheduling requirement and wind power system ruuning situation, can simultaneously for bulk power grid provides active power and reactive power, while the dispatching requirement meeting bulk power grid and wind power system internal load demand, can effectively suppress and the voltage fluctuation of site, take into account power supply reliability, ensure the fail safe of wind power system.
Accompanying drawing explanation
Fig. 1 shows a kind of block diagram with the grid connected wind power system of voltage stabilizing device of the present invention;
Fig. 2 shows a kind of operation and method for supervising with the grid connected wind power system of voltage stabilizing device of the present invention.
Embodiment
Fig. 1 shows a kind of grid connected wind power system 10 with voltage stabilizing device of the present invention, this wind power system 10 comprises: wind power plant 13, voltage stabilizing device 12, DC bus, the two-way change of current module 1 of AC/DC for being connected with DC bus by wind power plant, for the two-way change of current module 2 14 of AC/DC, wind generator system internal burden 16 and the supervising device that are connected with bulk power grid by DC bus and isolate; 11.
This voltage stabilizing device 12 comprises battery module 122, the two-way DC/DC converter 123 be connected with batteries by above-mentioned DC bus and SVG equipment 121.
This supervising device 11 comprises: wind power generation generating equipment monitoring module 113, for monitoring wind power plant in real time, and predicts the generated output of wind power plant; SVG monitoring of tools module 114, for monitoring SVG equipment in real time; Batteries monitoring module 115, can monitor SOC and the DC/DC reversible transducer of batteries in real time; Bulk power grid contact module 112, knows the ruuning situation of bulk power grid and relevant schedule information for real-time from bulk power grid regulation and control center; Be incorporated into the power networks monitoring module 116, connects or isolation bulk power grid for controlling wind power system; Load monitoring module 118, for the load in real-time wind power system; Middle control module 117, for determining the operation reserve of wind power system, and sends instruction to each module in above-mentioned supervising device, to perform this operation reserve; Bus module 111, for the liaison of the modules of this supervising device.
Preferably, described battery module 131 is divided into independent two the storage battery grouping (not shown) controlled, and the grouping of each group storage battery includes more than one storage battery, two group storage batteries is called the first batteries and the second batteries; Super capacitor 132, first batteries and the second batteries are connected on above-mentioned DC bus by two-way DC/DC converter respectively, realize the double-direction control of super capacitor, the first batteries and the second batteries.
Preferably, using the first batteries as charging accumulator group, using the second batteries as electric discharge batteries, the storage battery in charging accumulator group is in charged state or charging complete state, and the storage battery in electric discharge batteries is in discharge condition or waits for discharge condition; Prescribe a time limit under the state-of-charge of the part or all of storage battery in electric discharge batteries arrives state-of-charge, regulate this part or all of storage battery to charging accumulator group, the part or all of storage battery reaching the state-of-charge upper limit in charging accumulator group is adjusted to electric discharge batteries simultaneously, redistribute charging accumulator group and electric discharge batteries, form the first new batteries and the second batteries; In electric discharge batteries, some storage batterys that variety of priority driven carrying capacity is minimum or the overall mode exported with rated power of electric discharge batteries regulate super-capacitor voltage within nominal working range; In charging accumulator group, some storage batterys that variety of priority driven carrying capacity is maximum or charging accumulator group entirety enter electric discharge batteries.
Communication module 111, for the communication between above-mentioned modules, described bus communication module 111 is connected with other modules by redundancy dual CAN bus.
The service data of described wind power plant monitoring module 113 Real-time Obtaining wind power plant 12, and store data.
The checkout equipment that energy storage device monitoring module 116 at least comprises accumulator voltage, electric current, SOC obtain equipment and temperature testing equipment and ultracapacitor electric capacity voltage, can monitor the SOC of battery module and the capacitance voltage of ultracapacitor in real time.
Described SOC obtains equipment and comprises: the first acquisition module, for obtaining the operating state of battery; First determination module, for determining the evaluation method of estimating battery state-of-charge according to the operating state of battery; Computing module, for being in the battery charge state value under different operating states according to evaluation method calculating battery.
First determination module comprises: first determines submodule, and for when the operating state got is inactive state, determine that evaluation method is the first evaluation method, wherein, the first evaluation method comprises open circuit voltage method; Second determines submodule, for when the operating state got is for returning to form, determines that evaluation method is the second evaluation method; 3rd determines submodule, and for when the operating state got is charging and discharging state, determine that evaluation method is the 3rd evaluation method, wherein, the 3rd evaluation method comprises Kalman filtering method.
Further, evaluation method is the 3rd evaluation method, and computing module comprises: set up module, for the battery model utilizing three rank equivalent electric circuits to set up battery; Second determination module, for determining the state equation of battery model and measuring equation; First calculating sub module, for using state equation and the battery charge state value measuring equation calculating battery.
Further, evaluation method is the second evaluation method, and computing module comprises: the second acquisition module, is entering the operating state before returning to form for obtaining battery; Second calculating sub module, at battery when entering the operating state before returning to form and being discharge condition, according to the first formulae discovery battery charge state value, wherein, the first formula is
sOC
tfor the battery charge state value under returning to form, SOC
dfor battery charge state value when discharge condition stops, M is the accumulation electricity in battery discharge procedure, t be battery in the time returning to form lower experience, h is the default duration returned to form, and Q is the actual capacity of battery; 3rd calculating sub module, at battery when entering the operating state before returning to form and being charged state, according to the second formulae discovery battery charge state value, wherein, the second formula is SOC
t=SOC
c+ M × h × 100%, SOC
cfor battery charge state value when charged state stops.
Further, evaluation method is the first evaluation method, and computing module comprises: the 3rd acquisition module, for obtaining the open circuit voltage of battery; Read module, for reading battery charge state value corresponding to open circuit voltage.
Preferably, battery module 131 adopts lithium battery as the base unit of power storage.
Preferably, described battery module 131, comprises n battery pack, described DC/DC reversible transducer 132 has n DC/DC current transformer, n is more than or equal to 3, and each battery pack is by the discharge and recharge of a DC/DC inverter controller, and this n DC/DC current transformer controls by energy storage device monitoring module.
Middle control module 117 at least comprises CPU element, data storage cell and display unit.
Bulk power grid contact module 112 at least comprises Wireless Telecom Equipment.
Parallel control module 116 at least comprises checkout equipment, data acquisition unit and data processing unit for detecting bulk power grid 20 and micro-capacitance sensor 10 voltage, electric current and frequency.Data acquisition unit comprises collection preliminary treatment and A/D modular converter, gathers eight tunnel telemetered signal amounts, comprises grid side A phase voltage, electric current, the three-phase voltage of energy-accumulating power station side, electric current.Remote measurement amount changes strong ac signal (5A/110V) into inner weak electric signal without distortion by the high-precision current in terminal and voltage transformer.
See accompanying drawing 2, method of the present invention comprises the steps:
S1. wind power plant monitoring module Real-time Obtaining wind power plant service data, and store data;
S2. according to wind power plant, meritorious and idle prediction is exported to the wind power plant in following predetermined instant;
S3. the SOC obtaining battery module is detected in real time, internal burden power demand conditions in Real-time Obtaining wind power system;
S4. the parameter of Real-time Obtaining bulk power grid and schedule information, prediction future time wind power system is gained merit and reactive requirement with bulk power grid tie point;
S5. using the SOC of the meritorious of wind power system and bulk power grid tie point and reactive requirement, current batteries to store energy, current for wind power system internal burden is meritorious and reactive requirement demand, following wind power plant export gain merit and reactive requirement as constraints, realize the optimizing operation of wind power grid.
Preferably, the power output of arbitrary wind-power generated power forecasting method prediction wind power plant in prior art is adopted in step s 2.
Preferably, optimizing operation is realized in the following way in step s 5:
S51. active power output mode is optimized, preferential use wind power plant to and site active power of output, when wind power plant active power surplus, excess power is absorbed by batteries, again the active power of wind power plant can not meet and there is a common demand site when, by batteries active power of output, thus realize the stable of the active voltage of also site;
S52. Optimal Reactive Power power mode output, the idle output of reasonable distribution wind power equipment and the idle output of SVG equipment, thus realize the stable of the reactive voltage of also site.
Preferably, described S52 specifically comprises the steps:
S521. will also be converted to as follows and site reactive power aggregate demand Q by site reactive power/voltage control magnitude of voltage X
w, and calculate Q
wreactive power deviation delta Q in the cycle of place
w:
Q
W＝kX
ΔQ
W＝Q
W-Q
Wlast
Wherein, k is conversion coefficient, Q
wlastfor Q
wthe reactive power aggregate demand that the upper one-period in place cycle calculates;
If S522. | Δ Q
w|≤| A
s(MA
sVG-YF
s)+(MA
t-YF
t) |, then to step S523; Otherwise to step S524;
Wherein:
A
sfor the state of a control of SVG, AS value 0 or 1,0 for not allow automatic control, and 1 controls automatically for allowing;
A
tfor the adjustable reactive power coefficient of current wind power equipment, A
tvalue [0,1], by wind power plant monitoring module by calculate whole wind power plant allow Reactive-power control capacity after plan and draw;
YF
sby SVG monitoring of tools module is sent out reactive power to the current SVG of middle control module feedback;
YF
tby wind power plant monitoring module is sent out reactive power to the current wind generating equipment of middle control module feedback;
MA
sVGfor the maximum permission reactive power of SVG; MA
tfor all wind power plants maximum permission reactive power sum;
S523, described middle control module is at Q
win the cycle of place, point three steps carry out the Q between SVG Reactive Power Control module and wind power plant reactive power coordinating control module
wdistribute, specific as follows:
When the first step is distributed, make Q
sVG=A
sq
w(1-0.2A
t); Now SVG is main Reactive-power control equipment, can ensure the response time regulated;
When second step distributes, make Q
sVG=A
sq
w(1-0.5A
t); Carrying out this step is that reactive power in order to be born by SVG shifts to wind power plant, for SVG leaves larger adjustment nargin;
When 3rd step is distributed, make Q
sVG=A
sq
w(1-0.8A
t); After performing this step, more reactive power will be had and born by blower fan unit, thus reserve enough reactive power pondagies for SVG;
Wherein, Q
t=Q
w-Q
sVG,
Q
sVGfor the reactive power of the current distribution of SVG, Q
tfor the reactive power that whole wind power plant distributes; Work as Q
tvalue is the negative reactive power then reducing SVG;
S524. abnormality processing:
According to the Input of SVG and wind power plant, at the reactive power upper and lower bound that line computation wind energy turbine set allows, as the Q calculated
wbe greater than the upper limit or be less than in limited time lower, locking reactive power/voltage control function.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, make some equivalent to substitute or obvious modification, and performance or purposes identical, all should be considered as belonging to protection scope of the present invention.
Claims (7)
1. one kind has the grid connected wind power system of voltage stabilizing device, this system comprises: wind power plant, wind power plant, voltage stabilizing device, DC bus, the two-way change of current module one of AC/DC for being connected with DC bus by wind power plant, for the two-way change of current module two of AC/DC, wind generator system internal burden and the supervising device that are connected with bulk power grid by DC bus and isolate;
This voltage stabilizing device comprises battery module, the two-way DC/DC converter be connected with batteries by above-mentioned DC bus and SVG equipment;
This supervising device comprises:
Wind power generation generating equipment monitoring module, for monitoring wind power plant in real time, and predicts the generated output of wind power plant;
SVG monitoring of tools module, for monitoring SVG equipment in real time;
Batteries monitoring module, can monitor SOC and the DC/DC reversible transducer of batteries in real time;
Bulk power grid contact module, knows the ruuning situation of bulk power grid and relevant schedule information for real-time from bulk power grid regulation and control center;
Be incorporated into the power networks monitoring module, connects or isolation bulk power grid for controlling wind power system;
Load monitoring module, for the load in real-time wind power system;
Middle control module, for determining the operation reserve of wind power system, and sends instruction to each module in above-mentioned supervising device, to perform this operation reserve;
Bus module, for the liaison of the modules of this supervising device.
2. the system as claimed in claim 1, is characterized in that, described wind power plant monitoring module at least comprises wind power plant voltage, electric current and frequency detection equipment, wind speed measurement equipment.
3. the system as claimed in claim 1, is characterized in that, the service data of described wind power plant monitoring module Real-time Obtaining wind power plant, and stores data.
4. the system as claimed in claim 1, is characterized in that, batteries monitoring module at least comprises accumulator voltage, electric current, SOC acquisition equipment and temperature testing equipment.
5. a control method for the arbitrary wind power system as described in the claims 1-4, it is characterized in that, the method comprises the steps:
S1. wind power plant monitoring module Real-time Obtaining wind power plant service data, and store data;
S2. according to wind power plant, meritorious and idle prediction is exported to the wind power plant in following predetermined instant;
S3. the SOC obtaining battery module is detected in real time, Real-time Obtaining wind power system internal burden power demand conditions;
S4. the parameter of Real-time Obtaining bulk power grid and schedule information, prediction future time wind power system is gained merit and reactive requirement with bulk power grid tie point;
S5. using the SOC of the meritorious of wind power system and bulk power grid tie point and reactive requirement, current batteries to store energy, current for wind power system internal burden is meritorious and reactive requirement demand, following wind power plant export gain merit and reactive requirement as constraints, realize the optimizing operation of wind power grid.
6. method as claimed in claim 5, is characterized in that, adopts the power output of arbitrary wind-power generated power forecasting method prediction wind power plant in prior art in step s 2.
7. method as claimed in claim 5, is characterized in that, realize optimizing operation in the following way in step s 5:
S51. active power output mode is optimized, preferential use wind power plant to and site active power of output, when wind power plant active power surplus, excess power is absorbed by batteries, again the active power of wind power plant can not meet and there is a common demand site when, by batteries active power of output, thus realize the stable of the active voltage of also site;
S52. Optimal Reactive Power power mode output, the idle output of reasonable distribution wind power equipment and the idle output of SVG equipment, thus realize the stable of the reactive voltage of also site;
Preferably, described S52 specifically comprises the steps:
S521. will also be converted to as follows and site reactive power aggregate demand Q by site reactive power/voltage control magnitude of voltage X
w, and calculate Q
wreactive power deviation delta Q in the cycle of place
w:
Q
W＝kX
ΔQ
W＝Q
W-Q
Wlast
Wherein, k is conversion coefficient, Q
wlastfor Q
wthe reactive power aggregate demand that the upper one-period in place cycle calculates;
If S522. | Δ Q
w|≤| A
s(MA
sVG-YF
s)+(MA
t-YF
t) |, then to step S523; Otherwise to step S524;
Wherein:
A
sfor the state of a control of SVG, AS value 0 or 1,0 for not allow automatic control, and 1 controls automatically for allowing;
A
tfor the adjustable reactive power coefficient of current wind power equipment, A
tvalue [0,1], by wind power plant monitoring module by calculate whole wind power plant allow Reactive-power control capacity after plan and draw;
YF
sby SVG monitoring of tools module is sent out reactive power to the current SVG of middle control module feedback;
YF
tby wind power plant monitoring module is sent out reactive power to the current wind generating equipment of middle control module feedback;
MA
sVGfor the maximum permission reactive power of SVG; MA
tfor all wind power plants maximum permission reactive power sum;
S523, described middle control module is at Q
win the cycle of place, point three steps carry out the Q between SVG Reactive Power Control module and wind power plant reactive power coordinating control module
wdistribute, specific as follows:
When the first step is distributed, make Q
sVG=A
sq
w(1-0.2A
t); Now SVG is main Reactive-power control equipment, can ensure the response time regulated;
When second step distributes, make Q
sVG=A
sq
w(1-0.5A
t); Carrying out this step is that reactive power in order to be born by SVG shifts to wind power plant, for SVG leaves larger adjustment nargin;
When 3rd step is distributed, make Q
sVG=A
sq
w(1-0.8A
t); After performing this step, more reactive power will be had and born by blower fan unit, thus reserve enough reactive power pondagies for SVG;
Wherein, Q
t=Q
w-Q
sVG,
Q
sVGfor the reactive power of the current distribution of SVG, Q
tfor the reactive power that whole wind power plant distributes; Work as Q
tvalue is the negative reactive power then reducing SVG;
S524. abnormality processing:
According to the Input of SVG and wind power plant, at the reactive power upper and lower bound that line computation wind energy turbine set allows, as the Q calculated
wbe greater than the upper limit or be less than in limited time lower, locking reactive power/voltage control function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105322564A (en) * | 2015-10-22 | 2016-02-10 | 国家电网公司 | Wind-solar integrated power generation system capable of automatically achieving voltage balance |
| CN105337305A (en) * | 2015-10-22 | 2016-02-17 | 国家电网公司 | Supervision device of wind-light integrated power generation system for automatically realizing voltage balance |
| CN107023434A (en) * | 2016-01-29 | 2017-08-08 | 西门子公司 | Operate the wind turbine of wind power plant |
| CN108448651A (en) * | 2018-03-30 | 2018-08-24 | 北京天润新能投资有限公司 | A kind of the wind storage association system and control method of distributing wind-powered electricity generation |
| CN111786402A (en) * | 2020-07-22 | 2020-10-16 | 国网冀北电力有限公司电力科学研究院 | Method and device for switching reactive voltage control modes of flexible direct current transmission system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300567A (en) * | 2014-10-24 | 2015-01-21 | 东南大学 | Hybrid energy storage control method for stabilizing intermittent power supply power fluctuation |
| CN104297694A (en) * | 2014-11-04 | 2015-01-21 | 国家电网公司 | Obtaining method and device of charge state of battery |
| CN104348188A (en) * | 2014-11-21 | 2015-02-11 | 四川慧盈科技有限责任公司 | Distributed generation running and monitoring method |
| CN104505907A (en) * | 2015-01-09 | 2015-04-08 | 成都鼎智汇科技有限公司 | Monitoring device of battery energy storage system with reactive adjusting function |
| CN104600708A (en) * | 2015-01-16 | 2015-05-06 | 云南电网有限责任公司电力科学研究院 | SVG-containing wind power plant automatic voltage control distribution method |
| EP3016228A1 (en) * | 2014-10-29 | 2016-05-04 | Sungrow Power Supply Co., Ltd. | Photovoltaic power generation system, wind power generation system and control methods thereof |
-
2015
- 2015-05-12 CN CN201510238634.5A patent/CN104795843A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300567A (en) * | 2014-10-24 | 2015-01-21 | 东南大学 | Hybrid energy storage control method for stabilizing intermittent power supply power fluctuation |
| EP3016228A1 (en) * | 2014-10-29 | 2016-05-04 | Sungrow Power Supply Co., Ltd. | Photovoltaic power generation system, wind power generation system and control methods thereof |
| CN104297694A (en) * | 2014-11-04 | 2015-01-21 | 国家电网公司 | Obtaining method and device of charge state of battery |
| CN104348188A (en) * | 2014-11-21 | 2015-02-11 | 四川慧盈科技有限责任公司 | Distributed generation running and monitoring method |
| CN104505907A (en) * | 2015-01-09 | 2015-04-08 | 成都鼎智汇科技有限公司 | Monitoring device of battery energy storage system with reactive adjusting function |
| CN104600708A (en) * | 2015-01-16 | 2015-05-06 | 云南电网有限责任公司电力科学研究院 | SVG-containing wind power plant automatic voltage control distribution method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105322564A (en) * | 2015-10-22 | 2016-02-10 | 国家电网公司 | Wind-solar integrated power generation system capable of automatically achieving voltage balance |
| CN105337305A (en) * | 2015-10-22 | 2016-02-17 | 国家电网公司 | Supervision device of wind-light integrated power generation system for automatically realizing voltage balance |
| CN107023434A (en) * | 2016-01-29 | 2017-08-08 | 西门子公司 | Operate the wind turbine of wind power plant |
| CN108448651A (en) * | 2018-03-30 | 2018-08-24 | 北京天润新能投资有限公司 | A kind of the wind storage association system and control method of distributing wind-powered electricity generation |
| CN111786402A (en) * | 2020-07-22 | 2020-10-16 | 国网冀北电力有限公司电力科学研究院 | Method and device for switching reactive voltage control modes of flexible direct current transmission system |
| CN111786402B (en) * | 2020-07-22 | 2022-04-05 | 国网冀北电力有限公司电力科学研究院 | Method and device for switching reactive voltage control modes of flexible direct current transmission system |
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