CN106451528B - A kind of large-scale wind power off-grid control method of comprehensive FACTS and HVDC coordination optimization - Google Patents
A kind of large-scale wind power off-grid control method of comprehensive FACTS and HVDC coordination optimization Download PDFInfo
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- CN106451528B CN106451528B CN201610629241.1A CN201610629241A CN106451528B CN 106451528 B CN106451528 B CN 106451528B CN 201610629241 A CN201610629241 A CN 201610629241A CN 106451528 B CN106451528 B CN 106451528B
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- 238000009434 installation Methods 0.000 claims description 13
- 238000004458 analytical method Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 3
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- H02J3/386—
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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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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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
Abstract
The invention discloses the large-scale wind power off-grid control methods that a kind of comprehensive FACTS and HVDC is coordinated and optimized, and belong to power system and automation technology.The present invention is theoretical based on EEAC quantitative analysis theory, based on the improvement sensitivity to wind power plant collection bus voltage fluctuation, premised on guaranteeing security of system, it by FACTS equipment before coordination optimization accident, layouts, direct-current emergency algorithm for power modulation after capacity configuration and accident, seeks the coordination optimizing method of wind-powered electricity generation off-grid control the smallest FACTS and HVDC of cost a kind of.The present invention can be realized the inhibition of wind-powered electricity generation off-grid and the economical operation of power grid, be the operation of China's AC-DC hybrid power grid and new energy on a large scale using providing technical support.
Description
Technical field
The invention belongs to power system and automation technologies, and more precisely the present invention relates to a kind of synthesis
The large-scale wind power off-grid control method of FACTS and HVDC coordination optimization.
Background technique
Currently, HVDC (D.C. high voltage transmission) technology in China is widely applied, it is in extra-high voltage alternating current-direct current mixed connection bulk power grid
The transitional period deeply developed, " tetanic weak friendship " feature is obvious, wind-powered electricity generation mostly by scale concentrate access power grid in a manner of based on.But
With generation of electricity by new energy accounting raising and in recent years the multiple extensive blower off-grid event that occurs constantly occurs, all show me
The potential risk of the extensive blower off-grid of state is still very important.These potential risks prompt us, on the one hand need to improve wind-powered electricity generation and set
It is standby to relate to net ability and to wind-powered electricity generation place management level, also need actively to improve the inhibition to wind-powered electricity generation off-grid accident risk on the other hand
Ability optimizes dynamic passive compensation equipment in wind power plant.
With the Fast Construction of China's smart grid, extra-high voltage DC transmission system and various Survey of Flexible AC Transmission System
(Flexible AC Transmission System, FACTS) equipment is used widely in China's actual electric network,
So that the operation control of power grid is more flexible and economical, new control also is provided for the extensive off-grid problem of China's wind-powered electricity generation in recent years
Technology processed.But FACTS and HVDC coordination optimization how is integrated, there has been no mature solutions at present.
Summary of the invention
Object of the present invention is to: in order to solve the problems, such as to integrate FACTS and HVDC coordination optimization in the prior art, provide a kind of wind
The coordination optimizing method of the electric off-grid control the smallest FACTS and HVDC of cost, realizes the inhibition of wind-powered electricity generation off-grid and the economy of power grid
Operation.
Specifically, the present invention adopts the following technical solutions realize: with integrate FACTS and HVDC coordination optimization it is big
Scale wind-powered electricity generation off-grid Controlling model is Optimized model, the DC power modulation control strategy of configuration and HVDC to FACTS equipment
It is coordinated and optimized, considers safe and stable operation restraint condition, blower off-grid under forecast failure is chosen by Optimized model and is inhibited
The smallest strategy execution of cost is controlled, the FACTS equipment is SVC and controllable parallel reactors；
The large-scale wind power off-grid Controlling model of the comprehensive FACTS and HVDC coordination optimization is as follows:
S.t. g (x)=0
h(x)≤ε
Wherein, C represents blower off-grid under forecast failure and inhibits to control cost, and N is all grid-connected point sets of blower for installing SVC additional
It closes,The SVC capacity of j-th of blower grid entry point installation is represented, α represents the SVC price as unit of capacity；L is all adds
The controllable parallel reactors set of dress,The controllable parallel reactors capacity of k-th of installation is represented, it is single that β, which is represented with capacity,
The controllable parallel reactors price of position；O is all DC power modulation set, Pl DCRepresent the power of first of DC power modulation
Amount, γ represent DC power modulation price；PLWGBlower off-grid amount under the premise of guarantee system safety and stability is represented, it is de- that σ represents unit
The cost that net amount generates；G (x)=0 is the system equation constraint including power flow equation, and h (x)≤ε is to include control amount
The system inequality constraints of capacity limit and system stability requirement.
Above-mentioned technical proposal is further characterized by, and chooses the FACTS device type and configuration according to following manner
Installation point:
According to Net Frame of Electric Network and characteristic, chooses wind power plant and collects reference point of the station bus as voltage margin variation monitoring,
And choose a certain number of plant stand buses as FACTS device candidate in its near region and configure place, it is soft based on EEAC quantitative analysis
Part, emulates the initial voltage nargin η of forecast failure leeward voltage of electric field monitoring reference point, and candidate configuration place installation is sought in perturbation
Voltage margin η ' a little is monitored after FACTS equipment, is sought voltage margin improved values Δ η, the configuration cost of FACTS is considered, with Δ η
Cost performance is controlled as its voltage with the ratio of the configuration cost of FACTS, and is successively sorted, the high FACTS of cost performance is chosen and sets
Standby type and its configuration place.
Above-mentioned technical proposal is further characterized by, and the HVDC for participating in dc power and supporting is chosen according to following manner:
By perturb offline or on-line analysis calculation determine dc power support to wind power plant collect station bus electricity
The sensitivity influenced is pressed, considers that choosing the big direct current of sensitivity participates in algorithm for power modulation, DC power modulation amount is sent receiving-end system
Safety and stability constraint and the constraint of direct current peak load itself.
Beneficial effects of the present invention are as follows: the present invention is based on the improvement sensitivity to wind power plant collection bus voltage fluctuation,
Premised on guaranteeing security of system, by the way that FACTS equipment before coordination optimization accident is layouted, HVDC is straight after capacity configuration and accident
Algorithm for power modulation is flowed, seeks the coordination optimizing method of wind-powered electricity generation off-grid control the smallest FACTS and HVDC of cost a kind of, so as to reality
The inhibition of existing wind-powered electricity generation off-grid and the economical operation of power grid, for the safe operation of Chinese large-sized AC-DC hybrid power grid and large-scale wind power
Efficient application provide technical support.
Specific embodiment
Below with reference to embodiment, present invention is further described in detail.
Embodiment 1:
One embodiment of the present of invention controls mould to integrate the large-scale wind power off-grid of FACTS and HVDC coordination optimization
Type is Optimized model, the direct current function of configuration and HVDC to FACTS equipment (being SVC and controllable parallel reactors in the present embodiment)
Rate modulation control strategy is coordinated and optimized, and is considered safe and stable operation restraint condition, is chosen forecast failure by Optimized model
Lower blower off-grid inhibits the control the smallest strategy execution of cost.
The large-scale wind power off-grid Controlling model of above-mentioned comprehensive FACTS and HVDC coordination optimization is as follows:
S.t. g (x)=0
h(x)≤ε
Wherein, C represents blower off-grid under forecast failure and inhibits to control cost, and N is all grid-connected point sets of blower for installing SVC additional
It closes,The SVC capacity of j-th of blower grid entry point installation is represented, α represents the SVC price as unit of capacity；L is all adds
The controllable parallel reactors set of dress,The controllable parallel reactors capacity of k-th of installation is represented, it is single that β, which is represented with capacity,
The controllable parallel reactors price of position；O is all DC power modulation set, Pl DCRepresent the power of first of DC power modulation
Amount, γ represent DC power modulation price；PLWGBlower off-grid amount under the premise of guarantee system safety and stability is represented, it is de- that σ represents unit
The cost that net amount generates；G (x)=0 is the system equation constraint including power flow equation, and h (x)≤ε is to include control amount
The system inequality constraints of capacity limit and system stability requirement.The system inequality constraints must by system stability analysis come
Judgement.
The FACTS device type and configuration installation point are chosen according to following manner in the present embodiment: according to Net Frame of Electric Network
And characteristic, it chooses wind power plant and collects reference point of the station bus as voltage margin variation monitoring, and choose a fixed number in its near region
The plant stand bus of amount configures place as FACTS device candidate, is based on EEAC quantitative analysis software, emulates wind-powered electricity generation under forecast failure
Field voltage monitors the initial voltage nargin η of reference point, and perturb the electricity monitored after seeking candidate configuration place installation FACTS equipment a little
Nargin η ' is pressed, voltage margin improved values Δ η is sought, considers the configuration cost of FACTS, with the ratio of the configuration cost of Δ η and FACTS
Value controls cost performance as its voltage, and successively sorts, and chooses the high FACTS device type of cost performance and its configuration place.
The HVDC for participating in dc power and supporting is chosen in the present embodiment according to following manner: by perturbing or dividing offline online
Analysis calculation determines that dc power supports the sensitivity for collecting the voltage influence of station bus to wind power plant, considers to choose sensitivity
Big direct current participates in algorithm for power modulation, and DC power modulation amount is sent the constraint of receiving-end system safety and stability and direct current peak load itself
Constraint.
Although the present invention has been described by way of example and in terms of the preferred embodiments, embodiment is not for the purpose of limiting the invention.Not
It is detached from the spirit and scope of the present invention, any equivalent change or retouch done also belongs to the protection scope of the present invention.Cause
This protection scope of the present invention should be based on the content defined in the claims of this application.
Claims (3)
1. a kind of large-scale wind power off-grid control method of comprehensive FACTS and HVDC coordination optimization, which is characterized in that with synthesis
The large-scale wind power off-grid Controlling model of FACTS and HVDC coordination optimization is Optimized model, configuration and HVDC to FACTS equipment
DC power modulation control strategy coordinated and optimized, consider safe and stable operation restraint condition, chosen by Optimized model
Blower off-grid inhibits the control the smallest strategy execution of cost under forecast failure, and the FACTS equipment is SVC and controllable parallel reactance
Device；
The large-scale wind power off-grid Controlling model of the comprehensive FACTS and HVDC coordination optimization is as follows:
S.t. g (x)=0
h(x)≤ε
Wherein, C represents blower off-grid under forecast failure and inhibits to control cost, and N is all grid-connected point sets of blower for installing SVC additional,The SVC capacity of j-th of blower grid entry point installation is represented, α represents the SVC price as unit of capacity；L is all installations
Controllable parallel reactors set,The controllable parallel reactors capacity of k-th of installation is represented, β is represented as unit of capacity
Controllable parallel reactors price；O is all DC power modulation set,The quantity of power of first of DC power modulation is represented,
γ represents DC power modulation price；PLWGBlower off-grid amount under the premise of guarantee system safety and stability is represented, σ represents unit off-grid
Measure the cost generated；G (x)=0 is the system equation constraint including power flow equation, and h (x)≤ε is the appearance comprising control amount
The system inequality constraints of amount limitation and system stability requirement.
2. the large-scale wind power off-grid control method of comprehensive FACTS according to claim 1 and HVDC coordination optimization, special
Sign is, chooses the FACTS device type and configuration installation point according to following manner:
According to Net Frame of Electric Network and characteristic, chooses wind power plant and collect the reference point that station bus is monitored as voltage margin variation, and
Its near region chooses a certain number of plant stand buses as FACTS device candidate and configures place, is based on EEAC quantitative analysis software, imitates
Candidate configuration place installation FACTS is sought in the initial voltage nargin η of true forecast failure leeward voltage of electric field monitoring reference point, perturbation
Monitor voltage margin η ' a little after equipment, seek voltage margin improved values Δ η, consider the configuration cost of FACTS, with Δ η and
The ratio of the configuration cost of FACTS controls cost performance as its voltage, and successively sorts, and chooses the high FACTS equipment of cost performance
Type and its configuration place.
3. the large-scale wind power off-grid control method of comprehensive FACTS according to claim 1 and HVDC coordination optimization, special
Sign is, the HVDC for participating in dc power and supporting is chosen according to following manner:
By perturbing offline or on-line analysis calculation determines that dc power is supported to the voltage influence of wind-powered electricity generation collection bus
Sensitivity considers that choosing the big direct current of sensitivity participates in algorithm for power modulation, and DC power modulation amount is sent receiving-end system safety and stability
Constraint and the constraint of direct current peak load itself.
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| CN108173276B (en) * | 2017-12-21 | 2020-11-17 | 国电南瑞科技股份有限公司 | Control method for dealing with low frequency of large-scale fan after off-line |
| CN110233492A (en) * | 2018-12-23 | 2019-09-13 | 国网内蒙古东部电力有限公司经济技术研究院 | A method of grid stability under direct current locking failure is improved using FACTS technology |
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| CN103124075A (en) * | 2013-03-20 | 2013-05-29 | 东南大学 | Reactive power configuration method for wind power base |
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| CN104242314A (en) * | 2014-08-26 | 2014-12-24 | 清华大学 | Method for determining network voltage safe threshold value in wind power plant collected area |
| CN105762838A (en) * | 2016-05-13 | 2016-07-13 | 国电南瑞科技股份有限公司 | Reactive voltage multi-target control method of wind power cluster |
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Patent Citations (5)
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|---|---|---|---|---|
| CN103124075A (en) * | 2013-03-20 | 2013-05-29 | 东南大学 | Reactive power configuration method for wind power base |
| CN103280830A (en) * | 2013-04-27 | 2013-09-04 | 南京南瑞集团公司 | Overload control method suitable for large-scale wind power centralized access |
| CN103337855A (en) * | 2013-05-09 | 2013-10-02 | 国家电网公司 | Electrical network operation risk assessment method of wind electricity large-scale tripping |
| CN104242314A (en) * | 2014-08-26 | 2014-12-24 | 清华大学 | Method for determining network voltage safe threshold value in wind power plant collected area |
| CN105762838A (en) * | 2016-05-13 | 2016-07-13 | 国电南瑞科技股份有限公司 | Reactive voltage multi-target control method of wind power cluster |
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