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Direct current power distribution network fault classification positioning method

A technology of DC distribution network and positioning method, which is applied in the direction of fault location, fault detection according to conductor type, and measurement of electricity, which can solve the problem of inaccurate fault location in DC distribution network, improve screening accuracy and reduce complexity degree, the effect of improving efficiency

Active Publication Date: 2022-04-22
浙江浙能能源服务有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a fault classification and location method for DC distribution network, which can judge the fault location of the line by integrating factors inside and outside the line, so as to solve the faults of the existing DC distribution network The problem of inaccurate positioning

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  • Direct current power distribution network fault classification positioning method
  • Direct current power distribution network fault classification positioning method
  • Direct current power distribution network fault classification positioning method

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Embodiment Construction

[0039] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0040] see figure 1 , a DC distribution network fault classification location method, the location method includes the following steps:

[0041] Step S1, first divide the DC distribution network into several distribution sections through DC circuit breakers; by dividing the entire distribution network into several distribution sections, the independence of power supply for each distribution section can be achieved, so that in one of the distribution sections When a fault occurs in a power distribution section, the power distribution security of other power distribution sections is guaranteed.

[0042] In step S2, a fault detector is used to independently detect several distribution sections of the DC distribution network; at the same time, after ...

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Abstract

The invention provides a direct-current power distribution network fault classification positioning method. The positioning method comprises the following steps: S1, dividing a direct-current power distribution network into a plurality of power distribution intervals through a direct-current circuit breaker; s2, independently detecting a plurality of power distribution intervals of the direct-current power distribution network through a fault detector; s3, when a fault occurs in the direct current power distribution network, positioning the power distribution interval with the fault through a fault detector, separating the power distribution interval with the fault through a direct current circuit breaker, and opening other power distribution intervals without the fault at the same time; s4, determining a fault type according to a fault detector, and obtaining a fault generation factor through a fault database; and S5, processing according to the fault generation factors in combination with a fault impedance distance calculation method to obtain a fault position, and the method can integrate the factors inside and outside the line to judge the fault position of the line so as to solve the problem that the fault positioning of the existing DC power distribution network is not accurate enough.

Description

technical field [0001] The invention relates to the technical field of fault detection, in particular to a method for classifying and locating faults in a direct current distribution network. Background technique [0002] The DC distribution network is relative to the AC distribution network. It provides the load with the DC bus. The DC load can be directly powered by the DC bus, and the AC load needs to be powered by the inverter equipment. If the DC load in the load is proportional Larger, DC power distribution will have a greater advantage. The DC distribution network has low line loss, high reliability, no need for phase frequency control, and strong ability to accept distributed power sources. [0003] In the existing technology, in the process of fault monitoring for the distribution network, the impedance method is usually used to determine the fault location through current feedback in the distribution network, but this method of determining the fault point through ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/086G01R31/088Y04S10/52
Inventor 查烨斌王迎迎孙成富莫城恺
Owner 浙江浙能能源服务有限公司
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