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Method of analyzing the influence of mass wind power accessing on directional comparison pilot protection

A technology of directional protection and analysis method, which is applied in the direction of electrical components, circuit devices, AC network circuits, etc., and can solve the problems of increased misoperation rate of longitudinal directional protection, etc.

Active Publication Date: 2015-12-02
STATE GRID CORP OF CHINA +3
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Problems solved by technology

[0004] In the process of realizing the present invention, the inventors found that in the prior art at least there is a defect that when large-scale wind power is connected to the AC / DC hybrid system, the malfunction rate of the protection in the longitudinal direction increases.

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  • Method of analyzing the influence of mass wind power accessing on directional comparison pilot protection
  • Method of analyzing the influence of mass wind power accessing on directional comparison pilot protection
  • Method of analyzing the influence of mass wind power accessing on directional comparison pilot protection

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Embodiment Construction

[0082] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0083] According to an embodiment of the present invention, such as Figure 1(a)-Figure 6 As shown, a simulation verification analysis method for the impact of large-scale wind power access to the AC-DC hybrid system on the protection of the longitudinal direction is provided. The simulation verification analysis method for the impact of large-scale wind power access to AC-DC hybrid system on the protection of the longitudinal direction belongs to the technical field of simulation modeling of AC-DC hybrid grid transmission lines under the condition of large-scale wind power access, and specifically relates to a A simulation verification analysis method for the influ...

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Abstract

The invention discloses a method of simulating, verifying and analyzing the influence of mass wind power accessing to an AC-DC hybrid system on directional comparison pilot protection. The method mainly comprises the following steps of analyzing fault component directional elements; on the basis of the fault component direction analyzing result, establishing element classifications based on fault component directions; according to the element classifications based on the fault classification direction, performing system fault phase error analysis; according to the system fault phase error analysis result, performing application condition analysis of the fault component directional elements; and based on the fault component directional element application condition analysis result, setting up a simulation model and performing simulation and verification. The method of simulating, verifying and analyzing the influence of mass wind power accessing to the AC-DC hybrid system on directional comparison pilot protection can overcome defects existing in the prior art and characterized by great power grid fluctuation, high failure rate, bad safety, etc. By means of the method, advantages of low power grid fluctuation, low failure rate and good safety are achieved.

Description

technical field [0001] The invention relates to the technical field of wind power, in particular to a method for analyzing the impact of large-scale wind power access to an AC / DC hybrid system on protection in the longitudinal direction. Background technique [0002] Most of the large-scale wind power bases produced after my country's wind power enters the stage of large-scale development are located in the "Three North Regions" (Northwest, Northeast, and North China). Large-scale wind power bases are generally far away from the load center, and their power needs to be transmitted to the load center through long distances and high voltage. To digest. Due to the intermittence, randomness and volatility of wind resources, the wind power output of large-scale wind power bases will fluctuate in a large range, which will further lead to fluctuations in the charging power of the transmission network and bring a series of problems to the safety of power grid operation. [0003] As ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/24
Inventor 何世恩汪宁渤路亮宋国兵刘光途王定美吕清泉陈钊
Owner STATE GRID CORP OF CHINA
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