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Analysis method for obtaining maximum transient overvoltage of single feeder line of offshore wind power plant under asymmetric short circuit fault

A transient overvoltage and short-circuit fault technology, applied in electrical digital data processing, instrumentation, system integration technology, etc., can solve the problems of complex cable layout, harsh submarine environment, increased short-circuit faults, etc., to achieve convenient acquisition, clear structure, clear layered effect

Inactive Publication Date: 2017-03-22
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

The working conditions of offshore wind farms are that the power transmission of offshore wind power is completed through submarine cables, while the cable layout of offshore wind farms is more complicated, the submarine cables are longer, and the submarine environment is relatively harsh, which greatly increases the probability of short-circuit faults

Method used

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  • Analysis method for obtaining maximum transient overvoltage of single feeder line of offshore wind power plant under asymmetric short circuit fault
  • Analysis method for obtaining maximum transient overvoltage of single feeder line of offshore wind power plant under asymmetric short circuit fault
  • Analysis method for obtaining maximum transient overvoltage of single feeder line of offshore wind power plant under asymmetric short circuit fault

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Embodiment

[0044] Below in conjunction with accompanying drawing, the present invention is further described, please refer to accompanying drawing Figure 11 , Figure 11 It is a flow chart of the analysis method of the maximum transient overvoltage in this embodiment. An analysis method for obtaining the maximum transient overvoltage of a single feeder line of an offshore wind farm under an asymmetrical short-circuit fault disclosed in this embodiment specifically includes the following steps:

[0045] S1. Using PSCAD / EMTDC electromagnetic transient simulation software, aiming at the parallel layout of offshore wind farms in which wind turbines are connected by chain topology in actual engineering, a simulation model is established with the electrical system composed of a single feeder of the offshore wind farm as the research object;

[0046] In specific applications, the model should have and not be less than: an ideal power supply equivalent to an infinite power grid, a main transfo...

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Abstract

The invention relates to a method for obtaining a maximum transient overvoltage of a single feeder line in a cable power collection network of an offshore wind power plant under an asymmetric short circuit fault, and belongs to the technical field of overvoltages of power systems. According to the method, a PSCAD / EMTDC-based offshore wind power plant instance simulation model is built according to characteristics that a power collection system of the offshore wind power plant uses a large amount of power cables and a topological structure is relatively complex; and overvoltage simulation is performed for different short circuit fault points on the feeder line. By adopting the method, the influence of the fault points on the transient overvoltage is obtained more easily, so that the state of the maximum transient overvoltage in engineering is obtained; and related conclusions have a certain reference value for insulation protection of power collection network system and device of the offshore wind power plant.

Description

technical field [0001] The invention relates to the technical field of power system overvoltage, in particular to an analysis method for obtaining the maximum transient overvoltage of a single feeder of an offshore wind farm under an asymmetric short-circuit fault by using PSCAD / EMTDC simulation software. Background technique [0002] Large-scale wind farms are moving from land to sea. Promoting offshore wind power construction can not only guarantee my country's energy security and meet the sustainable supply of energy, but also an inevitable requirement for promoting energy conservation and emission reduction. [0003] At the same time, more and more attention has been paid to the operation and maintenance of wind farms, especially transient overvoltage and equipment insulation failures caused by it. The working condition of offshore wind farms is that the power transmission of offshore wind power is completed through submarine cables, while the cable layout of offshore wi...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06Q50/06
CPCG06Q50/06G06F30/20Y02E40/70Y04S10/50
Inventor 梁嘉浩郭亚勋江晓锋王加傲刘刚
Owner SOUTH CHINA UNIV OF TECH
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