CN104348163A - Voltage control method of 330kV wind farm collection substation - Google Patents
Voltage control method of 330kV wind farm collection substation Download PDFInfo
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- CN104348163A CN104348163A CN201410530073.1A CN201410530073A CN104348163A CN 104348163 A CN104348163 A CN 104348163A CN 201410530073 A CN201410530073 A CN 201410530073A CN 104348163 A CN104348163 A CN 104348163A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
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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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- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a voltage control method of a 330kV wind farm collection substation. The voltage control method of the 330kV wind farm collection substation comprises the following steps: a wind farm collection station is controlled to make a voltage out-of-limit judgment, a control strategy is started when voltage is out of limit, and the control is immediately ended when a set range is satisfied; a subordinate actuating station conducts longitudinal regulation; a 330kV wind farm collection station or substation is coordinately controlled to conduct transverse regulation to complete the control. On the premise that a power grid is guaranteed to run safely and economically, the capacity of accepting and delivering new energy of the power grid is realized, the wind curtailment is reduced, and the goal of improving the on-grid energy of the new energy is achieved.
Description
Technical field
The present invention relates to reactive power/voltage control technical field in scale generation of electricity by new energy process, particularly, relate to a kind of 330kV wind energy turbine set and collect control method of transformer station voltage.
Background technology
The large-scale new forms of energy base majority that China's wind-powered electricity generation produces after entering the large-scale development stage is positioned at " three northern areas of China " (northwest, northeast, North China); large-scale new forms of energy base is generally away from load center, and its electric power needs to be transported to load center to dissolve through long-distance, high voltage.For Gansu Power Grid, by April, 2014, the installed capacity of Gansu Power Grid grid connected wind power has reached 7,070,000 kilowatts, accounts for 20.2% of Gansu Power Grid total installed capacity (3,500 ten thousand kilowatts) capacity, becomes the second largest main force power supply being only second to thermoelectricity; Photovoltaic generation installed capacity has reached 4,350,000 kilowatts, accounts for 12.4% of Gansu Power Grid total installation of generating capacity, and simultaneously Gansu becomes China's photovoltaic and to install largest province.At present, Gansu Power Grid wind-powered electricity generation, photovoltaic generation installation account for 1/3 of Gansu Power Grid total installation of generating capacity.
Due to the intermittence of wind, light resources, randomness and fluctuation, the fluctuation of wind power output can cause large-scale wind electricity field voltage to occur corresponding fluctuation.When wind energy turbine set generation voltage comparatively large disturbances time, if do not have enough dynamic reactive to support, wind energy turbine set Voltage Drop will be caused.At present, the low-voltage tolerance of blower fan itself is very limited, and now Wind turbines is for the protection of self, often takes the mode of excision automatically, causes system to gain merit unbalance, and influential system is stablized; Meanwhile, asynchronous generator, does not possess the ability of maintenance and conditioner terminal voltage level, operationally also will from Systemic absorption reactive power, and therefore voltage stabilization sex chromosome mosaicism is more outstanding.
After system voltage falls, if electrical network can not provide enough idle, the Wind turbines set end voltage based on asynchronous generator cannot be rebuild, and causes overspeed protection or the under-voltage protection action excision Wind turbines of all asynchronous Wind turbines in whole wind energy turbine set; If protection cannot regular event, because the set end voltage of Wind turbines cannot be rebuild, then wind energy turbine set even regional power grid transient voltage unstability can be caused.Influence each other owing to exchanging between the voltage of whole electrical network of networked system and frequency, Jiuquan region wind power output significantly change must cause whole system voltage, frequency fluctuation, cause accident to expand further.Three fairly large blower fan off-grid accidents of Gansu Power Grid generation in 2011 are exactly cause for above-mentioned reasons.
Summary of the invention
The object of the invention is to, for the problems referred to above, propose a kind of 330kV wind energy turbine set and collect control method of transformer station voltage, to realize improving electrical network to the receiving of new forms of energy and send ability, reduce to abandon wind, improve the advantage of new forms of energy electricity volume.
For achieving the above object, the technical solution used in the present invention is:
A kind of 330kV wind energy turbine set collects control method of transformer station voltage, comprises the following steps:
Step one, wind energy turbine set are collected station control and are carried out voltage out-of-limit judgement, start control strategy, meet setting range finishing control at once when voltage out-of-limit;
Step 2, subordinate's actuating station longitudinally regulate;
Step 3,330kV wind energy turbine set collect station or substation cooperation control carries out lateral adjustments, thus complete control.
Preferably, described step one is specially using substation high side voltage U2 as cutting point, and according to control overflow, it is 352 kV ~ 360 kV that 330kV wind energy turbine set collects station control reference voltage.
Preferably, described step 2 is specially:
Start and longitudinally regulate, issue adjusting command by substation to subordinate's actuating station;
As U2 < 352kV, and our station regulation measure is when using up, transmitting order to lower levels controls the highest actuating station of sensitivity and regulates SVC/SVG, issue additional its capacitive reactive power compensation capacity, be limited, until U2 > 352 kV with the constraint of actuating station voltage and SVC/SVG capacity; If actuating station SVC/SVG Reactive-power control capacity is used up and U2 < 352kV, the actuating station regulating wind power field that then transmitting order to lower levels control sensitivity is the highest is idle exerts oneself, be limited, until U2 > 352 kV with the set end voltage constraint of the constraint of actuating station voltage, blower fan and the blower fan Reactive-power control limit; If wind energy turbine set is idle, pondage of exerting oneself is used up and U2 < 352kV, then transmitting order to lower levels controls sensitivity time high actuating station and regulates again; So regulate actuating station successively, till U > 352 kV according to control sensitivity order from high to low;
As U2 > 360kV, and our station regulation measure is when using up, transmitting order to lower levels controls the highest actuating station of sensitivity and regulates SVC/SVG, issue additional its inductive reactive power compensation capacity, be limited, until U2 < 360kV with the constraint of actuating station voltage and SVC/SVG capacity; If actuating station SVC/SVG pondage is used up and U2 > 360kV, the actuating station regulating wind power field that then transmitting order to lower levels control sensitivity is the highest is idle exerts oneself, be limited, until U2 < 360kV with the set end voltage constraint of the constraint of actuating station voltage, blower fan and the blower fan Reactive-power control limit; If wind energy turbine set is idle, pondage of exerting oneself is used up and U2 > 360kV, then continue transmitting order to lower levels and control sensitivity time high actuating station and regulate; So regulate actuating station successively, till U2 < 360kV according to control sensitivity order from high to low.
Preferably, described step 3 is specially:
When target control substation voltage out-of-limit, and longitudinal regulation measure is when using up, send application horizontal coordination to main website to control, main website orders the highest all the other the category-A substation of regulable control sensitivity and cooperation control substation, this cooperation control substation orders to control its subordinate's actuating station, namely regulates according to sensitivity that the wind energy turbine set of actuating station is idle exerts oneself and SVC/SVG from high to low successively; If after the cooperation control substation regulation and control that sensitivity is the highest, target control substation voltage is still out-of-limit, then order regulable control sensitivity time high all the other category-A substation and cooperation control substation; So regulate all the other category-A substations successively, till target control substation U2 meets 352 kV < U2 < 360kV scopes according to control sensitivity order from high to low.
Technical scheme of the present invention has following beneficial effect:
Technical scheme of the present invention, by regulating and controlling the voltage of wind energy turbine set, when substation voltage out-of-limit, is first carried out substation and is controlled on the spot, secondly considers subordinate's actuating station regulation and control, considers that wind energy turbine set collects the cooperation control between station simultaneously.The maincenter link that substation controls as wind-powered electricity generation, completes the cooperation control to whole region while playing Link role.Regulated and controled by classification.Under the prerequisite ensureing power grid security economical operation, realization raising electrical network is to the receiving of new forms of energy and send ability, reduces to abandon wind, improves the object of new forms of energy electricity volume.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 collects the flow chart of control method of transformer station voltage for the 330kV wind energy turbine set described in the embodiment of the present invention;
When Fig. 2 is U2 < 352kV, wind energy turbine set control sub-station longitudinally regulates flow chart;
When Fig. 3 is U2 > 360kV, wind energy turbine set control sub-station longitudinally regulates flow chart;
Fig. 4 is wind energy turbine set control sub-station lateral adjustments flow chart.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
As shown in Figure 1, voltage out-of-limit judges:
Wind energy turbine set is collected station and is controlled (secondary voltage control) using substation high side voltage U2 as cutting point, and according to the control overflow of system, it is 352 ~ 360kV that 330kV wind energy turbine set collects station control reference voltage.Start control strategy when voltage out-of-limit, meet scope finishing control at once.
Longitudinally regulate (subordinate's actuating station regulates):
When 330kV wind energy turbine set collect station voltage U 2 out-of-limit time, first start and longitudinally regulate, issue adjusting command by substation to subordinate's actuating station.Specifically as shown in Figure 2:
As U2 < 352kV, and our station regulation measure is when using up, transmitting order to lower levels controls the highest actuating station of sensitivity and regulates SVC/SVG, issues additional its capacitive reactive power compensation capacity, be limited, until U2 meets scope with the constraint of actuating station voltage and SVC/SVG capacity; If actuating station SVC/SVG Reactive-power control capacity is used up and U2 < 352kV, the actuating station regulating wind power field that then transmitting order to lower levels control sensitivity is the highest is idle exerts oneself, be limited, until U2 meets scope with the constraint of actuating station voltage, the constraint of blower fan set end voltage and the blower fan Reactive-power control limit; If wind energy turbine set is idle, pondage of exerting oneself is used up and U2 < 352kV, then transmitting order to lower levels controls sensitivity time high actuating station and regulates, and regulative mode is the same; So regulate actuating station successively, till U2 meets scope according to control sensitivity order from high to low.
As shown in Figure 3, as U2 > 360kV, and when our station regulation measure is used up, transmitting order to lower levels controls the highest actuating station of sensitivity and regulates SVC/SVG, issue additional its inductive reactive power compensation capacity, be limited, until U2 meets scope with the constraint of actuating station voltage and SVC/SVG capacity; If actuating station SVC/SVG pondage is used up and U2 > 360kV, the actuating station regulating wind power field that then transmitting order to lower levels control sensitivity is the highest is idle exerts oneself, be limited, until U2 meets scope with the constraint of actuating station voltage, the constraint of blower fan set end voltage and the blower fan Reactive-power control limit; If wind energy turbine set is idle, pondage of exerting oneself is used up and U2 > 360kV, then transmitting order to lower levels controls sensitivity time high actuating station and regulates, and regulative mode is the same; So regulate actuating station successively, till U2 meets scope according to control sensitivity order from high to low.
Lateral adjustments (all the other 330kV wind energy turbine set collect station/substation cooperation control):
When target control substation voltage out-of-limit, and when longitudinal regulation measure is used up, transmit application horizontal coordination to main website and control.As shown in Figure 4, main website orders the highest all the other the category-A substation (cooperation control substation) of regulable control sensitivity, this cooperation control substation orders to control its subordinate's actuating station, method is with 2) in the method that longitudinally regulates consistent, namely regulate according to sensitivity that the wind energy turbine set of actuating station is idle exerts oneself and SVC/SVG from high to low successively; If target control substation voltage is still out-of-limit after the highest cooperation control substation regulation and control of sensitivity, then all the other category-A substation (cooperation control substation) that regulable control sensitivity of ordering is time high; So regulate all the other category-A substations successively, till target control substation U2 meets scope according to control sensitivity order from high to low.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. 330kV wind energy turbine set collects a control method of transformer station voltage, it is characterized in that, comprises the following steps:
Step one, wind energy turbine set are collected station control and are carried out voltage out-of-limit judgement, start control strategy, meet setting range finishing control at once when voltage out-of-limit;
Step 2, subordinate's actuating station longitudinally regulate;
Step 3,330kV wind energy turbine set collect station or substation cooperation control carries out lateral adjustments, thus complete control.
2. 330kV wind energy turbine set according to claim 1 collects control method of transformer station voltage, it is characterized in that, described step one is specially using substation high side voltage U2 as cutting point, and according to control overflow, it is 352 kV ~ 360 kV that category-A 330kV wind energy turbine set collects station control reference voltage.
3. 330kV wind energy turbine set according to claim 2 collects control method of transformer station voltage, it is characterized in that, described step 2 is specially:
Start and longitudinally regulate, issue adjusting command by substation to subordinate's actuating station;
As U2 < 352kV, and our station regulation measure is when using up, transmitting order to lower levels controls the highest actuating station of sensitivity and regulates SVC/SVG, issue additional its capacitive reactive power compensation capacity, be limited, until U2 > 352 kV with the constraint of actuating station voltage and SVC/SVG capacity; If actuating station SVC/SVG Reactive-power control capacity is used up and U2 < 352kV, the actuating station regulating wind power field that then transmitting order to lower levels control sensitivity is the highest is idle exerts oneself, be limited, until U2 > 352 kV with the set end voltage constraint of the constraint of actuating station voltage, blower fan and the blower fan Reactive-power control limit; If wind energy turbine set is idle, pondage of exerting oneself is used up and U2 < 352kV, then transmitting order to lower levels controls sensitivity time high actuating station and regulates again; So regulate actuating station successively, till U > 352 kV according to control sensitivity order from high to low;
As U2 > 360kV, and our station regulation measure is when using up, transmitting order to lower levels controls the highest actuating station of sensitivity and regulates SVC/SVG, issue additional its inductive reactive power compensation capacity, be limited, until U2 < 360kV with the constraint of actuating station voltage and SVC/SVG capacity; If actuating station SVC/SVG pondage is used up and U2 > 360kV, the actuating station regulating wind power field that then transmitting order to lower levels control sensitivity is the highest is idle exerts oneself, be limited, until U2 < 360kV with the set end voltage constraint of the constraint of actuating station voltage, blower fan and the blower fan Reactive-power control limit; If wind energy turbine set is idle, pondage of exerting oneself is used up and U2 > 360kV, then continue transmitting order to lower levels and control sensitivity time high actuating station and regulate; So regulate actuating station successively, till U2 < 360kV according to control sensitivity order from high to low.
4. 330kV wind energy turbine set according to claim 3 collects control method of transformer station voltage, it is characterized in that, described step 3 is specially:
When target control substation voltage out-of-limit, and longitudinal regulation measure is when using up, send application horizontal coordination to main website to control, main website orders the highest all the other the category-A substation of regulable control sensitivity and cooperation control substation, this cooperation control substation orders to control its subordinate's actuating station, namely regulates according to sensitivity that the wind energy turbine set of actuating station is idle exerts oneself and SVC/SVG from high to low successively; If after the cooperation control substation regulation and control that sensitivity is the highest, target control substation voltage is still out-of-limit, then order regulable control sensitivity time high all the other category-A substation and cooperation control substation; So regulate all the other category-A substations successively, till target control substation U2 meets 352 kV < U2 < 360kV scopes according to control sensitivity order from high to low.
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| CN201410530073.1A CN104348163B (en) | 2014-10-10 | 2014-10-10 | 330kV wind energy turbine set collects control method of transformer station voltage |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004104865A (en) * | 2002-09-05 | 2004-04-02 | Toshiba Corp | Control method for stationary reactive power compensator |
| CN103208803A (en) * | 2013-04-18 | 2013-07-17 | 国家电网公司 | Reactive voltage optimal control method for wind electricity and photo-electricity integrated grid connection |
| CN103259267A (en) * | 2013-05-17 | 2013-08-21 | 华北电力大学 | Mold splitting type voltage control method for wind power plant cluster |
| KR20140078230A (en) * | 2012-12-17 | 2014-06-25 | 대우조선해양 주식회사 | Method for compensating reactive power of onshore wind power generator in low voltage ride through of the power grid |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004104865A (en) * | 2002-09-05 | 2004-04-02 | Toshiba Corp | Control method for stationary reactive power compensator |
| KR20140078230A (en) * | 2012-12-17 | 2014-06-25 | 대우조선해양 주식회사 | Method for compensating reactive power of onshore wind power generator in low voltage ride through of the power grid |
| CN103208803A (en) * | 2013-04-18 | 2013-07-17 | 国家电网公司 | Reactive voltage optimal control method for wind electricity and photo-electricity integrated grid connection |
| CN103259267A (en) * | 2013-05-17 | 2013-08-21 | 华北电力大学 | Mold splitting type voltage control method for wind power plant cluster |
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