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Maximum transient overvoltage analysis method and system of offshore wind plant electrical system

A transient overvoltage and electrical system technology, applied in the field of power grid, can solve problems such as harsh environment, complex working conditions, and threats to the safety of electrical equipment

Inactive Publication Date: 2017-03-15
CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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AI Technical Summary

Problems solved by technology

Offshore wind farms use a large number of power cables, the working conditions are complex, and the environment is harsh, which greatly increases the probability of various failures
For example, the frequent opening and closing of offshore wind farm circuit breakers is prone to overvoltage on closing; the development of large offshore wind farms is accelerating, and short-circuit faults threaten the safety of electrical equipment

Method used

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  • Maximum transient overvoltage analysis method and system of offshore wind plant electrical system
  • Maximum transient overvoltage analysis method and system of offshore wind plant electrical system
  • Maximum transient overvoltage analysis method and system of offshore wind plant electrical system

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Embodiment Construction

[0020] In one embodiment, a method for analyzing the maximum transient overvoltage of an offshore wind farm electrical system, such as figure 1 shown, including the following steps:

[0021] Step S120: Obtain structural data of the electrical system of the offshore wind farm, and perform simulation based on the structural data to establish a simplified electrical system of the wind farm with the electrical system of the offshore wind farm as the research object.

[0022] The specific composition and layout of the wind farm are not unique, and the structural data may specifically include data such as the parameters of each component in the electrical system of the offshore wind farm and the connection relationship between components. Through the PSCAD / EMTDC electromagnetic transient simulation software, for a wind farm with wind turbines connected in a chain topology and arranged in a parallel manner, a simulation model with the entire wind farm electrical system as the researc...

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Abstract

The invention relates to a maximum transient overvoltage analysis method and system of an offshore wind plant electrical system. Structural data of the offshore wind plant electrical system is obtained, simulation is performed according to the structural data, and a simplified wind plant electrical system with the offshore wind plant electrical system as a research object is established. Transient overvoltage of the simplified wind plant electrical system under the switching-on situation, transient overvoltage under the switching situation and transient overvoltage under the short-circuit fault situation are respectively simulated, further the maximum transient overvoltage of the offshore wind plant electrical system is obtained, and a result is output. By synthesizing the transient overvoltage under the switching-on situation, the transient overvoltage under the switching situation and the transient overvoltage under the short-circuit fault situation of an offshore wind plant, the maximum transient overvoltage of the offshore wind plant electrical system under the three working conditions is obtained, accordingly references are provided for insulation matching, device type selection and the like of the electrical system, and the operating safety reliability of the wind plant is improved.

Description

technical field [0001] The invention relates to the technical field of power grids, in particular to a method and system for analyzing the maximum transient overvoltage of an electrical system of an offshore wind farm. Background technique [0002] With the continuous development of my country's economy and society, the demand for renewable energy is increasing. As a clean energy, the utilization of wind energy will be an important direction of future development. The offshore wind farm has the advantages of abundant wind energy resources and does not occupy land, and it is the top priority of future development. [0003] More and more attention has been paid to the operation and maintenance of offshore wind farms. Offshore wind farms use a large number of power cables, the working conditions are complex, and the environment is harsh, which greatly increases the probability of various failures. For example, the frequent opening and closing of offshore wind farm circuit br...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 郑明陆莹郭亚勋江晓锋梁嘉浩
Owner CHINA ENERGY ENG GRP GUANGDONG ELECTRIC POWER DESIGN INST CO LTD
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