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Method and device for analyzing faults of source-containing power distribution network

A technology of distribution network fault and analysis method, which is applied in the directions of fault location, electrical digital data processing, special data processing application, etc., can solve problems such as difficulty in fault analysis, and achieve the effect of easy implementation and high precision

Inactive Publication Date: 2015-06-10
国网内蒙古东部电力有限公司通辽供电公司 +1
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Problems solved by technology

[0006] In view of this, the purpose of the present invention is to overcome the shortcomings of the prior art and solve the problem of difficult fault analysis caused by the access of distributed power sources to the distribution network. Therefore, the present invention proposes a fault analysis method for power distribution networks and The device, the method and the device establish the short-circuit equivalent model of the distributed power source by analyzing the short-circuit characteristics of the distributed power source itself, and use the multi-state phase component method based on the phase component model to analyze the fault of the distribution network containing the distributed power source

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  • Method and device for analyzing faults of source-containing power distribution network

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[0059] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0060] Detailed exemplary embodiments are disclosed below. However, specific structural and functional details disclosed herein are merely for purposes of describing example embodiments.

[0061] It should be understood, however, that the invention is not limited to the particular exemplary embodiments disclosed, but covers all modifications, equivalents, and alternatives falling within the scope of the disclosure. Throughout the description of the figures, the same reference numerals denote the same elements.

[0062]Also, it should be understood that as used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Also it will be understood that when a component or unit is referred to as being “connected” or “coupled” to another component or unit, it can be directly connected or coupled to the other component or u...

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Abstract

The invention discloses a method for analyzing faults of a source-containing power distribution network and a device for analyzing the faults. The method comprises the following steps: A, determining specific parameters of an original power distribution network and a distributed power supply; B, acquiring an initial load flow state by analyzing the steady-state load flow of the power distribution network; C, listing an admittance matrix model in a single-phase form without connecting the distributed power supply; D, establishing the short-circuit equivalent model of the distributed power supply based on the different-interface form, and amending the admittance matrix model by overlaying the network; E, processing the faults by a polymorphic phase-coordinate method according to the types of the faults; F, performing short-circuit analysis to obtain fault analysis results. According to the method and the device, the faults of the source-containing power distribution network can be effectively analyzed, and the method and the device are easy to realize and high in precision.

Description

technical field [0001] The invention relates to the technical field of power system analysis and control, in particular to the analysis technology of a distribution network containing distributed power sources. Background technique [0002] Power system fault analysis and calculation methods have been a research hotspot for many years, and they play a very important role in power system planning and design, accident analysis, operation setting and action behavior analysis of power system relay protection devices. The power grid is a three-phase network system. When the three phases are symmetrical, the three-phase calculation problem can be transformed into a single-phase calculation problem, otherwise it can only be calculated in a three-phase manner. The three-phase asymmetry of the power grid includes operation asymmetry, parameter asymmetry and their combination. Regardless of the calculation method used, three-phase calculations are definitely more cumbersome than sin...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08G06F17/50G06Q50/06
CPCY02E60/00
Inventor 华亮亮黄伟黄松涛赵洪春郭海波曹昉窦磊徐昌宝孔博李志鹏王姝人
Owner 国网内蒙古东部电力有限公司通辽供电公司
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