Reliability determination method for power distribution network with distributed wind power based on analytical method

A determination method and reliability technology, which are applied in the field of reliability determination of distribution network including distributed wind power, can solve the problem that the reliability analysis of distribution network including distributed power cannot be used, and achieve the effect of improving computing efficiency.

Inactive Publication Date: 2014-05-28
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0007] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a method for determining the reliability of a distribution network with distributed wind power based on an analytical method, which is suitable for analyzing the reliability of feeder-radiating power distribution systems and distribution systems with distributed

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  • Reliability determination method for power distribution network with distributed wind power based on analytical method
  • Reliability determination method for power distribution network with distributed wind power based on analytical method
  • Reliability determination method for power distribution network with distributed wind power based on analytical method

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[0052] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0053] Such as image 3 As shown, image 3 for image 3 It is a flow chart of a method for determining the reliability of a distribution network containing decentralized wind power based on the analytical method; the method for determining the reliability of a distribution network containing decentralized wind power based on the analytical method provided by the present invention includes the following steps:

[0054] Step 1: Establish a distributed power supply reliability model;

[0055] Step 2: Establish a wind power output model;

[0056] Step 3: Establish the state transition probability model of the wind turbine;

[0057] Step 4: Determine the time of each operating state in the wind power output model, and obtain the transfer rate between the states of the wind turbine;

[0058] Step 5. Determine the failure rate of the fan;

[0059]...

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Abstract

The invention provides a reliability determination method for a power distribution network with distributed wind power based on an analytical method. The method comprises the following steps: step I, building a distributed power reliability model; step II, building a wind power output model; step III, building a state transition probability model of a wind turbine generator; step IV, determining the time of every operating state in an output model of the wind turbine generator to obtain the transition probability between the states of the wind turbine generator; step V, determining the fault rate of the wind turbine generator; and step VI, modeling a wind power farm into a conventional unit in a plurality of derated states and performing reliability calculation. The method is suitable for analyzing the reliability of a feeder line radiation type power distribution system and a power distribution system with distributed wind power supply, and the method not only solves the modeling problem of a power supply point in the reliability calculation after a distributed wind turbine generator is connected to the power distribution network, but also solves the problem that the analytical method cannot be used for calculation during reliability analysis of the power distribution network with distributed power.

Description

technical field [0001] The invention relates to a method in the field of distribution system reliability assessment, in particular to a method for determining the reliability of a distribution network containing decentralized wind power based on an analytical method. Background technique [0002] The research on the reliability of power distribution system began in the early 1980s. The commonly used reliability of power distribution system is Failure Mode Effects Analysis (FMEA), which uses reliability data of components (lines, circuit breakers, disconnectors, transformers) , establish a failure mode consequence table, analyze each failure event and its consequences, and then form a comprehensive reliability index. [0003] In recent years, more and more distributed power sources have been connected to the distribution network. As a large number of distributed power sources are connected to the distribution network, the analysis and calculation model of their reliability h...

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Application Information

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IPC IPC(8): H02J3/00
CPCY02B10/30
Inventor 李蕊马康吕志鹏刘海涛
Owner STATE GRID CORP OF CHINA
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