CN112865200A - Wind power stability limit analysis method - Google Patents
Wind power stability limit analysis method Download PDFInfo
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- CN112865200A CN112865200A CN202110389467.XA CN202110389467A CN112865200A CN 112865200 A CN112865200 A CN 112865200A CN 202110389467 A CN202110389467 A CN 202110389467A CN 112865200 A CN112865200 A CN 112865200A
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- 238000004458 analytical method Methods 0.000 title claims abstract description 17
- 238000004364 calculation method Methods 0.000 claims abstract description 19
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000010248 power generation Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
A wind power stability limit analysis method relates to a wind power generation stability limit analysis technology and aims to meet the requirement of safe operation of a power grid system and improve the proportion of wind power in the power grid system. The method is based on the grid structure of the power grid system and the configuration of a power supply, and determines the total load of the power grid system; operating the wind turbine generator in a mode of a PQ node, and determining a power factor of the wind turbine generator; obtaining boundary conditions of the operation of the wind turbine generator; establishing a wind power starting mode calculation model; adding a wind turbine generator, and inputting the added starting-up operation parameters of the wind turbine generator into a wind power starting-up mode calculation model to obtain a calculation result; judging whether the calculation result obtained in the step five is converged, if so, increasing the wind turbine; and otherwise, stopping adding the wind turbine generator, and determining the wind power stability limit value. The method has the beneficial effects that the occupation ratio of the wind power in the power grid system is determined simply and quickly.
Description
Technical Field
The invention relates to a wind power generation stability limit analysis technology.
Background
Wind energy is used as a renewable pollution-free green energy source, the effects of large-scale development and utilization of the wind energy on the aspects of relieving energy crisis, protecting the environment, promoting sustainable development and the like are increasingly prominent, high attention is paid to all countries in the world, and wind power generation becomes a new energy power generation technology; with the national strong support for renewable energy power generation in policy, the wind power construction in China also enters a period of rapid development. However, due to the inherent randomness, intermittency and fluctuation of wind energy, the existing grid system adopts a mode of bundling wind power and thermal power for operation; therefore, on the premise of ensuring the stability of the power grid system, how to maximize the wind power ratio is very important.
Disclosure of Invention
The purpose of the invention is: the wind power stability limit analysis method is provided for solving the problem of increasing the proportion of wind power in a power grid system under the condition of meeting the safe operation of the power grid system.
The wind power stability limit analysis method is realized by the following steps:
step one, determining the total load of a power grid system based on a grid structure of the power grid system and power supply configuration;
secondly, operating the wind turbine generator in a mode of a PQ node, and determining a power factor of the wind turbine generator;
step three, obtaining boundary conditions of the operation of the wind turbine generator according to the power factor of the wind turbine generator determined in the step two;
step four, establishing a wind power starting mode calculation model according to the wind turbine generator operation boundary conditions obtained in the step three and the total load of the power grid system determined in the step one;
fifthly, adding the wind turbine generator, and inputting the added starting operation parameters of the wind turbine generator into the wind power starting mode calculation model established in the fourth step to obtain a calculation result;
step six, judging whether the calculation result obtained in the step five is converged, if so, returning to execute the step five; otherwise, executing step seven;
and step seven, stopping adding the wind turbine generator, and determining the wind power stability limit value.
The invention has the beneficial effects that: the starting sequence and the starting number of the air outlet motor set can be quickly determined by the limit analysis method, and the proportion of wind power in a power grid system is determined according to the starting number, so that the method is simple and quick; meanwhile, the limit analysis method is convenient for transient analysis of the faults of the overline, is convenient for monitoring the wind speed-power curve and the power angle curve of each wind power station, and provides early conditions for improving the thermal power over-excitation problem.
Drawings
Fig. 1 is a flow chart of a wind power stability limit analysis method according to a first embodiment.
Detailed Description
The first embodiment is as follows: the present embodiment is described with reference to fig. 1, and the wind power stability limit analysis method according to the present embodiment is implemented by the following steps:
step one, determining the total load of a power grid system based on a grid structure of the power grid system and power supply configuration;
secondly, operating the wind turbine generator in a mode of a PQ node, and determining a power factor of the wind turbine generator;
step three, obtaining boundary conditions of the operation of the wind turbine generator according to the power factor of the wind turbine generator determined in the step two;
step four, establishing a wind power starting mode calculation model according to the wind turbine generator operation boundary conditions obtained in the step three and the total load of the power grid system determined in the step one;
fifthly, adding the wind turbine generator, and inputting the added starting operation parameters of the wind turbine generator into the wind power starting mode calculation model established in the fourth step to obtain a calculation result;
step six, judging whether the calculation result obtained in the step five is converged, if so, returning to execute the step five; otherwise, executing step seven;
and step seven, stopping adding the wind turbine generator, and determining the wind power stability limit value.
In this embodiment, the operation of the wind turbine generator at the PQ node in the step two means: one wind turbine plant stands on one wind turbine plant, two wind turbine plants stand on two wind turbine plants, and the wind turbines do not reserve rotation and run at PQ nodes.
In this embodiment, the wind turbine generator power factor determined in step two includes: 0.97, 0.95 and 0.90.
In this embodiment, the boundary conditions of the operation of the wind turbine obtained in the third step include whether a reactor of the wind turbine is put into operation, whether a capacitor is removed, whether a pump operates in a working condition, and whether the wind turbine generates reactive power while generating active power, and the reactive power accounts for 20% of the active power.
In this embodiment, the wind power stability limit value determined in the seventh step is used to determine the starting sequence and the starting number of the wind turbine generators.
Take the east grid of China as an example:
on the basis of the grid structure and the power supply configuration of the east power grid system, the load total amount of the east power grid system is determined to be 3741MW, the units operate in a small mode, namely one unit is erected in a double-unit plant, two units are erected in a four-unit plant, the units do not reserve rotary power, the units operate in a PQ node, the power factor is 0.97, all reactors of the east power grid system are put into operation, and the capacitors are removed;
under the boundary condition, gradually increasing the east wind power starting until the calculation is not converged, and determining the minimum wind power starting mode power which enables the calculation not to be converged; the determination result is as shown in table one:
minimum wind power starting mode power meter with unconverged meter-wind motor
At the moment, the east net 4 returns to the 500kV section and is delivered with 2348MW in total, and the middle east section is delivered with 2660MW in total; to quickly achieve misconvergence in the calculations, the east boot sequence is roughly: before construction, he gang, Yi Chun, Jixi and Shuangyao.
Claims (5)
1. A wind power stability limit analysis method is characterized by being realized through the following steps:
step one, determining the total load of a power grid system based on a grid structure of the power grid system and power supply configuration;
secondly, operating the wind turbine generator in a mode of a PQ node, and determining a power factor of the wind turbine generator;
step three, obtaining boundary conditions of the operation of the wind turbine generator according to the power factor of the wind turbine generator determined in the step two;
step four, establishing a wind power starting mode calculation model according to the wind turbine generator operation boundary conditions obtained in the step three and the total load of the power grid system determined in the step one;
fifthly, adding the wind turbine generator, and inputting the added starting operation parameters of the wind turbine generator into the wind power starting mode calculation model established in the fourth step to obtain a calculation result;
step six, judging whether the calculation result obtained in the step five is converged, if so, returning to execute the step five; otherwise, executing step seven;
and step seven, stopping adding the wind turbine generator, and determining the wind power stability limit value.
2. The wind power stability limit analysis method according to claim 1, wherein the operation of the wind turbine generator in the PQ node manner in the second step is: one wind turbine plant stands on one wind turbine plant, two wind turbine plants stand on two wind turbine plants, and the wind turbines do not reserve rotation and run at PQ nodes.
3. The wind power stability limit analysis method according to claim 2, wherein the wind turbine generator power factor determined in the second step comprises: 0.97, 0.95 and 0.90.
4. The wind power stability limit analysis method according to claim 3, wherein the boundary conditions of the operation of the wind turbine obtained in the third step include whether a reactor of the wind turbine is put into operation, whether a capacitor is removed, whether a pump is in working condition operation, and whether the wind turbine generates reactive power while generating active power, and the reactive power accounts for 20% of the active power.
5. The wind power stability limit analysis method according to claim 4, wherein the wind power stability limit value determined in the seventh step is used for determining a starting sequence and a starting number of the wind turbine generator.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113746136A (en) * | 2021-09-09 | 2021-12-03 | 广东电网有限责任公司广州供电局 | Wind-fire bundling delivery capacity configuration method, device and equipment based on transient limit |
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2021
- 2021-04-12 CN CN202110389467.XA patent/CN112865200A/en active Pending
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| CN102510108A (en) * | 2011-11-10 | 2012-06-20 | 山东电力调度中心 | Method for calculating maximum wind power installed capacity of district power network |
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| CN107294130A (en) * | 2017-06-28 | 2017-10-24 | 东北电力大学 | A kind of wind storage generating black starting-up system and its energy storage configuration method |
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| CN113746136A (en) * | 2021-09-09 | 2021-12-03 | 广东电网有限责任公司广州供电局 | Wind-fire bundling delivery capacity configuration method, device and equipment based on transient limit |
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