Distribution network grounding adaptive control system and method

An adaptive control and distribution network technology, which is applied to electrical components, circuit devices, emergency protection circuit devices, etc., can solve problems such as difficulty in ensuring reliability, reducing power supply reliability, and low isolation efficiency, and achieves obvious characteristics of faulty lines , Guarantee the reliability of power supply and the effect of wide adaptability

An adaptive control and distribution network technology, which is applied to electrical components, circuit devices, emergency protection circuit devices, etc., can solve problems such as difficulty in ensuring reliability, reducing power supply reliability, and low isolation efficiency, and achieves obvious characteristics of faulty lines , Guarantee the reliability of power supply and the effect of wide adaptability

CN104092206BActive Publication Date: 2017-03-22STATE GRID CORP OF CHINA +2
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  • Distribution network grounding adaptive control system and method
  • Distribution network grounding adaptive control system and method
  • Distribution network grounding adaptive control system and method

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Experimental program
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Effect test

Embodiment Construction

[0046] Such as figure 1 As shown in the figure, the distribution network grounding adaptive control system adds a group of adaptive control parallel loops on the basis of the original neutral point being grounded through the arc suppressing coil. The switch K, the switching of the switch K and the adjustment of the resistance value are all optimized and adjusted through the adaptive control module, and the bus PT (voltage transformer) is set on the bus. The input of the adaptive control module in the system includes neutral point voltage, neutral point current, line zero-sequence CT current, bus PT voltage, peripheral input (parameter setting) and other grid data; the output includes arc suppression coil Various types of data such as the gear control value of the parallel resistor, the switching signal of the switch K, the grounding signal, the tripping signal, and the line selection information.

[0047] Among them, the self-adaptive control module includes the following fou...

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Abstract

On the basis of an original system, a bus PT, a self-adaptive control parallel loop, a self-adaptive control module and the like are added for a power distribution network grounding self-adaptive control system. Optimization and adjustment on switching and a resistance value of a switch are achieved under the system support by adopting a self-adaptive control method and through the self-adaptive control module. The method further provides a self-adaptive control optimization strategy for adjustment of an arc extinction coil and a variable-resistance gear. The power distribution network grounding self-adaptive control system improves the accuracy of fault line tripping, effectively reduces control and adjustment errors during a next fault, effectively prevents grounding fault signals from being mistakenly send and remarkably improves the line selection accuracy in a single-phase grounding mode.

Description

technical field [0001] The invention relates to a grounding system of a distribution network neutral point, in particular to a distribution network grounding adaptive control system and an adaptive control method. Background technique [0002] The grounding method of the neutral point of the power grid is closely related to the reliability, safety and economy of the power system operation. With the construction and development of the smart grid, the selection of the neutral point grounding method for the urban power grid and distribution network has become the current smart grid. The key issues of modernization transformation and construction. In the current medium-voltage distribution network, the grounding methods of the neutral point mainly include three methods: non-grounding, arc-suppression coil grounding and small resistance grounding. The following three methods are briefly analyzed: [0003] 1) Ungrounded method [0004] In this mode, the equivalent capacitance of...

Claims

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Application Information

Patent Timeline
22 Mar 2017
Publication
CN104092206B
IPC
H02H9/08; H02H7/26
Inventors
瞿寒冰; 尹茂林