CN107017620A - A kind of static voltage stability region of ac and dc systemses containing wind power plant section acquiring method - Google Patents
A kind of static voltage stability region of ac and dc systemses containing wind power plant section acquiring method Download PDFInfo
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- CN107017620A CN107017620A CN201710217262.7A CN201710217262A CN107017620A CN 107017620 A CN107017620 A CN 107017620A CN 201710217262 A CN201710217262 A CN 201710217262A CN 107017620 A CN107017620 A CN 107017620A
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- 230000003068 static effect Effects 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000005611 electricity Effects 0.000 claims abstract description 16
- 241000208340 Araliaceae Species 0.000 claims description 8
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims description 8
- 235000003140 Panax quinquefolius Nutrition 0.000 claims description 8
- 235000008434 ginseng Nutrition 0.000 claims description 8
- 230000010354 integration Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000002347 injection Methods 0.000 abstract description 5
- 239000007924 injection Substances 0.000 abstract description 5
- 238000010248 power generation Methods 0.000 description 3
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Classifications
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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
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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
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- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The present invention discloses a kind of static voltage stability region of ac and dc systemses containing wind power plant section acquiring method, it is related to field of power, the power of the random output of wind power plant is modeled first, then randomness power is substituted into AC DC continuous tide equation, expects to expect with voltage level so as to obtain critical point load margin.The static voltage stability region of ac and dc systemses containing wind power plant section is tried to achieve by asking for collapse of voltage node.The method is available for later power system static security domain to ask for providing new thinking, provides basis for the power system security domain of asking for more conforming to actual wind-powered electricity generation injection, important references are made to power system progress safe and stable operation to power scheduling personnel.
Description
Technical field
The invention belongs to power system security stable operation field, it is considered to the power system containing wind power plant and DC control
The section acquiring method of Static Voltage Stability Region.
Background technology
With the demand that people are developed to new energy, wind-powered electricity generation is taken seriously as a kind of regenerative resource of cleaning.Currently
Power system apoplexy Denso machine holds the constantly soaring of total amount, to the use of wind-powered electricity generation also in lasting follow-up.Wind power output it is multiple not
Influence of the certainty to power network also becomes clear day by day, it is considered to influence of the wind power output to power network static security, to maintaining power system
Safety and stability and improve particularly significant to the utilization of wind-powered electricity generation.
Wind-power electricity generation is as a kind of special forms of electricity generation for being different from conventional power generation usage, with different from conventional electric power generation form
Feature, with Renewable Energy Development encouragement policy deeply and worldwide environmental protection pressure, wind-power electricity generation just by
Step moves towards industrialization and scale, and influence of the wind-powered electricity generation characteristic to power network is further notable, and large-scale wind generates electricity and had influence on access
All many-sides such as security, stability, the quality of power supply and the coordinated scheduling of area power grid, or even cause some serious bear
Face rings, and becomes to restrict the obstacle of large-scale wind power development to a certain degree.
In face of the world's Wind Power Generation Industry and Wind Power In China industry being surging forward, the grid-connected fortune of large-scale wind power in the urgent need to address
Capable key technical problem, it is especially wind farm grid-connected after influence to Network Voltage Stability, for improving line voltage matter
Amount, it is ensured that system is safe and reliable and economical operation all has very important significance, and is planning and designing, the wind-powered electricity generation of wind power plant
The policy making and production run of development provide technical basis, with important practical value and theory significance.
In order to be able to will be preferably combined the characteristics of power system with developing the theory of clean reproducible energy, research contains wind
The feature of the power system static security domain of the active Random-fuzzy injection of electricity, the electricity of power system is injected to Random-fuzzy containing wind-powered electricity generation
Press the properties study of collapse point very necessary.Wind power resources can be made full use of to ensure system operation safety again as dispatcher
Important references, the utilization rate important in inhibiting to stepping up system wind-powered electricity generation.
The content of the invention
Power system is accessed for large-scale wind power machine, its uncertainty exerted oneself causes hidden to system safe and stable operation
Suffer from, it is necessary to which the influence that Wind turbines are accessed with the system safety and stability domain of power system deploys to study.Traditional view thinks base
Go out what power system static security domain under force mode was to determine in fixed system, hence it is evident that be not applied for wind power output in real time not
The situation of determination.The present invention asks for the system of AC and DC power containing wind power plant in the case of considering that wind-powered electricity generation Random-fuzzy does not know to exert oneself
System Static Voltage Stability Region section, can approximately describe inhibited stably distribution situation with stable region section, will contain DFIG
Wind power plant power system tide model containing ginseng is improved, and is built the power system steady state voltage stability of wind power plant containing DFIG domain and is cut flat with
Face approximate fits.
To achieve the above object, the present invention takes following technical scheme：
1st, a kind of static voltage stability region of ac and dc systemses containing wind power plant section acquiring method, it is characterised in that：
(1) consider the randomness of wind power integration, build power system power flow equation containing ginseng；
(2) hvdc control mode is added；
(3) wind power plant power system steady state voltage stability domain section is modeled.
2nd, consider the randomness of wind power integration, build power system power flow equation containing ginseng.First to the random output of wind power plant
Power be modeled, then by randomness power substitute into AC DC continuous tide equation in so that obtain critical point bear
Lotus nargin is expected to expect with voltage level.
3rd, hvdc control mode is added, system voltage static stability is still by the AC transmission system power transmission limit
Influence, system PV curves and Critical operating point can be accurately obtained using continuous tide.
4th, collapse of voltage point (i.e. SNB points) is tried to achieve by continuous tide first, then solves ac and dc systemses containing wind power plant
Static voltage stability region section.
Brief description of the drawings
Fig. 1 is ac and dc systemses PV characteristic curves；
Fig. 2 is DC power transmission line.
Embodiment
The present invention comprises the following steps：
1st, consider the randomness of wind power integration, build power system power flow equation containing ginseng
The power flow equation group containing ginseng of AC and DC power system containing wind power plant：
In formula：Pi0、Qi0Active power and reactive power that node i is initially injected are represented respectively；PWi、QWiWind is represented respectively
Active power and reactive power that electric field is sent, it is zero that node, which is not connected with value during Wind turbines,；Vi, θ represent i node respectively
Voltage and phase angle；For the power-factor angle of each load；αiRepresent each generator output growing direction；βiRepresent each load
Power growing direction.λ is the load variations parameter of system；N is PV node and PQ node number sums, M be PQ node numbers it
With；K=1,2 ..., Nc, NcFor transverter number；Vdk, IdkRespectively DC voltage and DC current, node are not connected to direct current
V during circuitdk, IdkIt is zero；For converter power factor angle；θkFor converter Control angle.
2nd, consider the randomness of wind power integration, build power system power flow equation containing ginseng
(1) straight-flow system transverter fundamental equation：
Δd1k=Vdk-kTkVN+k cosθdk+XckIdk=0 (2)
In formula, Xck is transverter equivalent reactance；KTk is converter power transformer no-load voltage ratio；K γ are that commutation coefficient typically takes
0.995。
(2) DC network equation：
In formula：Gdkj is DC network admittance.
(3) converter Control equation：
Converter Control needs determination, and each transverter need to determine two in two control variables, the square equations of correspondence following formula 5
The equation group of individual equation composition：
3rd, continuous tide tries to achieve collapse of voltage point
When calculating the section containing wind power plant AC and DC power system stable region, voltage is tried to achieve by continuous tide first
Collapse point (i.e. SNB points), stable region side is can obtain in SNB points to formula F (x, α, β, Pw, C1ds, C2ds, λ)=0 linearisation
Linear approximation equation of the boundary in the SNB points：
Fx|*Δx+Fα|*Δα+Fβ|*Δβ+FW|*ΔPW+FC1d|*ΔC1d+
FC2d|*ΔC2d+Fλ|*Δ λ=0 (7)
In formula |*Represent that corresponding coefficient meets equation (3.1) from system inhibited stably SNB points, the i.e. point；Fx
|*It is system in the SNB point AC and DC power system Jacobian matrixs；Fα|*, Fβ|*, Fλ|*, FC1d|*, FC2d|*Representing respectively should
At SNB points, power flow equation is to its lower target partial derivative.By 3.2 formula premultiplication FxThe corresponding left eigenvector ω of zero eigenvalue, and
The substitution of 3.1 formulas can obtain into inhibited stably in the tangent equation of SNB points is:
ωFW|*ΔPW+ωFα|*Δα+ωFβ|*Δβ+ωFC1d|*ΔC1d+
ωFC2d|*ΔC2d+ωFλ| * Δs λ=0 (8)
(8) formula can also be expressed as：
In formula：
In order to which the static system voltage stability domain section for representing formula (9) is empty in power Injection Space and DC control value
Between on, it is as follows according to α, β and λ and the generator relation exerted oneself between payload：
Formula (11) is substituted into formula (9) and eliminates α, β and λ, be can obtain：
The linearisation of (12) formula can be obtained in given SNB points：
2nd, the Static Voltage Stability Region of AC and DC power system containing wind power plant section is taken
Formula (13) abbreviation is available, and power Injection Space tangent equation is：
aPG+bPL+mC1d+nC2d+zPW+ Y=0 (14)
A in formula, b, m, n, z are row vector, and Y is real number, and its value is shown in formula (15)：
(15) e is and K α columns identical unit row vectors in formula.Formula (14) is exactly in power Injection Space and direct current control
The expression formula in the Static Voltage Stability Region of AC and DC power system containing the wind power plant section of value processed spatially.
Embodiments above is merely to illustrate the present invention, and not limitation of the present invention, about the common of technical field
Technical staff, without departing from the spirit and scope of the present invention, can also make a variety of changes and modification, therefore all
Equivalent technical scheme falls within the protection category of the present invention.
Claims (4)
1. a kind of static voltage stability region of ac and dc systemses containing wind power plant section acquiring method, it is characterised in that：
(1) consider the randomness of wind power integration, build power system power flow equation containing ginseng；
(2) hvdc control mode is added；
(3) wind power plant power system steady state voltage stability domain section is modeled.
2. one kind static voltage stability region of ac and dc systemses containing wind power plant section according to claim 1 acquiring method,
Characterized in that, the step 1) consider wind power integration randomness, build power system containing ginseng power flow equation.First to wind-powered electricity generation
The power that field is exported at random is modeled, and is then substituted into randomness power in AC DC continuous tide equation, so as to ask
Go out critical point load margin to expect to expect with voltage level.
3. one kind static voltage stability region of ac and dc systemses containing wind power plant section according to claim 1 acquiring method,
Characterized in that, the step 2) hvdc control mode is added, system voltage static stability is still by AC transmission system work(
The influence of rate transmission limit, system PV curves and Critical operating point can be accurately obtained using continuous tide.
4. one kind static voltage stability region of ac and dc systemses containing wind power plant section according to claim 1 acquiring method,
Characterized in that, the step 3) collapse of voltage point (i.e. SNB points) is tried to achieve by continuous tide first, then solve and contain wind power plant
Ac and dc systemses static voltage stability region section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710217262.7A CN107017620B (en) | 2017-04-05 | 2017-04-05 | Method for obtaining voltage static stability region tangent plane of alternating current-direct current system containing wind power plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710217262.7A CN107017620B (en) | 2017-04-05 | 2017-04-05 | Method for obtaining voltage static stability region tangent plane of alternating current-direct current system containing wind power plant |
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| Publication Number | Publication Date |
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| CN107017620A true CN107017620A (en) | 2017-08-04 |
| CN107017620B CN107017620B (en) | 2021-07-06 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101247045B (en) * | 2008-03-20 | 2010-08-11 | 天津大学 | Electric voltage safety monitoring method based on voltage stabilization field in partition load space |
| CN101895130A (en) * | 2010-08-08 | 2010-11-24 | 天津大学 | Solution method of local boundary of injection space voltage stability region having wind power station |
| CN103248049A (en) * | 2013-05-22 | 2013-08-14 | 长沙理工大学 | Method of obtaining electrical power system voltage stability domain tangent plane containing DFIG (Doubly Fed Induction Generator) wind power plant |
| CN105447658A (en) * | 2016-01-06 | 2016-03-30 | 长沙理工大学 | Voltage collapse point calculation method comprising wind power random fuzzy injection power system fluctuation |
-
2017
- 2017-04-05 CN CN201710217262.7A patent/CN107017620B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101247045B (en) * | 2008-03-20 | 2010-08-11 | 天津大学 | Electric voltage safety monitoring method based on voltage stabilization field in partition load space |
| CN101895130A (en) * | 2010-08-08 | 2010-11-24 | 天津大学 | Solution method of local boundary of injection space voltage stability region having wind power station |
| CN103248049A (en) * | 2013-05-22 | 2013-08-14 | 长沙理工大学 | Method of obtaining electrical power system voltage stability domain tangent plane containing DFIG (Doubly Fed Induction Generator) wind power plant |
| CN105447658A (en) * | 2016-01-06 | 2016-03-30 | 长沙理工大学 | Voltage collapse point calculation method comprising wind power random fuzzy injection power system fluctuation |
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