Intelligent distributed self-healing control method based on fault at 0.4kV side in distribution substation

A self-healing control and distributed technology, applied in the field of smart substations, to achieve the effect of reducing operating costs, eliminating monitoring blind spots, and improving comprehensive operation levels

Inactive Publication Date: 2015-09-16
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, provide an intelligent distributed self-healing control method b

Method used

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  • Intelligent distributed self-healing control method based on fault at 0.4kV side in distribution substation
  • Intelligent distributed self-healing control method based on fault at 0.4kV side in distribution substation
  • Intelligent distributed self-healing control method based on fault at 0.4kV side in distribution substation

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Embodiment Construction

[0040] Embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings:

[0041] An intelligent distributed self-healing control method based on 0.4kV side faults in distribution stations is based on figure 1 Realized on the intelligent substation system shown. In the figure, T 1 : Indicates No. 1 transformer, T 2 : Indicates No. 2 transformer, L 1 : No. 1 0.4kV busbar, L 2 : No. 2 0.4kV busbar, K T1 : Indicates the 10kV outlet switch of No. 1 transformer, K T2 : Indicates the 10kV outlet switch of No. 2 transformer, K Z1 : Indicates the 0.4kV receiving master switch of No. 1 transformer, K Z2 : Indicates the 0.4kV receiving master switch of No. 2 transformer, K M1-2 : Indicates the bus tie switch between No. 1 low-voltage bus and No. 2 low-voltage bus, U TL1 : Indicates the voltage from the lower port of No. 1 transformer to the upper port of the receiver, U TL2 : Indicates the voltage from the lower port of N...

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Abstract

The invention relates to an intelligent distributed self-healing control method based on a fault at a 0.4kV side in a distribution substation. The method is characterized by comprising the following steps: fault type judgment is carried out when power failure of a bus is detected, and when the fault is a low-voltage bus fault, the self-healing function is locked, and the fault is handled manually; when the fault is a low-voltage outgoing line protection refusal fault, an outgoing line switch is switched off, and a main switch is reclosed; when the fault is a low-voltage line fault, the main switch is reclosed; and when the fault is another fault, a bus coupler carries out self-healing. Automatic fault location, fault isolation, recovery of power supply to non-fault regions, and other functions at the 0.4kV side in a distribution substation are achieved, blind areas in 0.4 kV equipment monitoring are eliminated, the reliability of power supply is further improved, the level of integrated operation of distribution automation is improved in an overall manner, the equipment utilization rate is improved, power loss is reduced, and the electricity selling loss is lowered for power supply enterprises.

Description

technical field [0001] The invention belongs to the technical field of intelligent substations, in particular to an intelligent distributed self-healing control method based on 0.4kV side faults in distribution substations. Background technique [0002] With the popularization of smart grid concepts and technologies, the intelligent level of substations has received more and more attention from the industry. In recent years, with the large-scale promotion of distribution automation technology, the intelligent level of substations has gradually developed to low-voltage levels. 0.4kV is used as the final voltage level in the substation, and the intelligence of this voltage level will effectively ensure the reliability and economy of equipment operation. [0003] Whether it is 0.4kV side self-healing control or economical operation, it is basically to operate the bus tie switch between the buses after a section of the bus is powered off. At present, when the intelligence is n...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J13/00
Inventor 徐科葛荣刚刘聪高政赵俊亚迟福建李桂鑫徐晶王哲
Owner STATE GRID CORP OF CHINA
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