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A Fault Classification and Location Method for DC Distribution Network

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: 2022-06-24
浙江浙能能源服务有限公司
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  • Application Information

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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

Method used

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  • A Fault Classification and Location Method for DC Distribution Network
  • A Fault Classification and Location Method for DC Distribution Network
  • A Fault Classification and Location Method for DC Distribution Network

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Embodiment Construction

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

[0040] see figure 1 , a method for classifying and locating faults in a DC distribution network, the locating method comprising the following steps:

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

[0042] In step S2...

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Abstract

The present invention provides a fault classification and positioning method for a DC distribution network. The positioning method includes the following steps: Step S1, first divide the DC distribution network into several power distribution sections through a DC circuit breaker; Step S2, use a fault detector to detect Several power distribution sections of the DC distribution network are independently detected; step S3, when the DC distribution network fails, first use the fault detector to locate the faulty distribution section, and use the DC circuit breaker to locate the faulty distribution section Separate and open other power distribution sections without fault at the same time; step S4, determine the fault type according to the fault detector, and then obtain the fault generating factor through the fault database; step S5, process according to the fault generating factor combined with the calculation method of fault impedance distance After obtaining the fault location, the present invention can judge the fault location of the line by integrating factors inside and outside the line, so as to solve the problem of inaccurate fault location in the existing DC distribution network.

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 DC distribution network. Background technique [0002] The DC distribution network is relative to the AC distribution network. It provides the load with a DC bus. The DC load can be directly powered by the DC bus, while the AC load needs to be powered by the inverter device. If the proportion of the DC load in the load is Larger, DC power distribution will have greater advantages. The DC distribution network has small line loss, high reliability, no need for phase frequency control, and strong ability to accept distributed power sources. [0003] In the prior art, in the process of fault monitoring for the distribution network, the impedance method is usually used to perform current feedback in the distribution network to determine the fault location, but this method of determining the fault point through feedback is rela...

Claims

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Application Information

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Patent Type & Authority Patents(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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