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Wind power plant high-voltage off-network fault tracing method based on SU-MRMR and PSO-SVM

A technology of PSO-SVM and wind farm, applied in the field of electric power, can solve the problems such as the source tracing method of high voltage off-grid faults in unseen wind farms

Active Publication Date: 2020-04-14
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing research content of wind farm off-grid faults is to build a wind farm off-grid assessment, early warning and anti-off-grid measure system, and there is no research on the source tracing method of high-voltage off-grid faults in wind farms

Method used

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  • Wind power plant high-voltage off-network fault tracing method based on SU-MRMR and PSO-SVM
  • Wind power plant high-voltage off-network fault tracing method based on SU-MRMR and PSO-SVM
  • Wind power plant high-voltage off-network fault tracing method based on SU-MRMR and PSO-SVM

Examples

Experimental program
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Effect test

Embodiment 1

[0087] Such as figure 1 , the method includes the following steps: step 1, constructing high-voltage off-grid fault scenarios of different wind farms through simulation.

[0088] Among them, the construction of fault scenarios includes: setting simulation parameters, including fault type, fault location, fault start and end time, and reactive power compensation equipment capacity at the grid connection point of the wind farm; fault type, fault location, and fault start and end time obey random distribution, and the fault Types include three-phase short circuit, DC commutation failure, DC blocking, etc. The fault location is distributed on each node close to the wind farm, and the interval between the start and end of the fault is 0.2s~0.4s. It is set according to the rated output power of each fan, generally 50% of the rated output power. Then read the electrical and mechanical quantities of the wind farm after the transient stability simulation.

[0089] Step 2. Construct a...

Embodiment 2

[0152] Such as Figure 4 , this embodiment uses a local area of ​​China's Northwest Power Grid as a test system. The test system includes 1 DC transmission line, 15 wind farms, 10 thermal power plants and 36 busbar nodes, and traces the source of high-voltage off-grid composite faults in wind farms. , and summarized the composite fault tracing results.

[0153] The samples used in the test examples are generated by the PSASP transient stability simulation platform, and the parameters involved in the samples are expressed in per unit values. First, run the steady-state operating conditions of the Northwest Power Grid in the simulation model, including the output of each generator in the power grid, the load level of each node, etc.; second, set the location, type, and start and end time of the fault, and obey the random distribution. The fault location is the busbar of the wind farm in the Northwest Power Grid and its surroundings. The fault types include: double three-phase s...

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Abstract

The invention discloses a wind power plant high-voltage off-network fault tracing method based on SU-MRMR and PSO-SVM. The method comprises the following steps: (1) setting different types of transient faults through simulation; (2) constructing a wind power plant high-voltage off-network index system according to a data sample; (3) screening out characteristic indexes on the basis of an SU-MRMR (symmetricaluncertainty and MRMR)) method; and (4) carrying out high-voltage off-network fault tracing on the basis of a PSO-SVM (Particle Swarm Optimization and Support Vector Machine) method. An index system constructed by the invention combines electrical and mechanical quantities of the wind power plant during high-voltage off-network, and can reflect a high-voltage off-network characteristic of the wind power plant; and the wind power plant high-voltage off-network fault tracing method can be used to quickly and accurately trace a high-voltage off-network fault of the wind power plant, hasgood stability, and can adapt to different types of fault scenes in an actual power grid.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a SU-MRMR and PSO-SVM-based method for tracing the source of high-voltage off-grid faults in wind farms. Background technique [0002] my country's wind farms usually adopt a large-scale centralized development model. Large-scale wind power bases are generally far away from the load center, and usually need to be connected to high-voltage levels of the power system or DC transmission lines for long-distance power transmission. The advantage of centralized wind power grid connection lies in the large-scale development and utilization of wind power, but there are also some problems such as weak voltage support capability and prominent reactive power and voltage problems. Especially in a typical power grid with clustered wind turbines connected to a weak grid and long-distance transmission, equipment failures and insufficient adjustment capabilities of wind power plants are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
Inventor 王玉荣朱奕飞王琦汤奕
Owner SOUTHEAST UNIV
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