No-power-stoppage conversion circuit breaker set sequential control method for 30-degree angular phase difference power distribution lines

A technology for distribution lines and incoming line circuit breakers, applied in the field of power grids, can solve the problems of burning, affecting and destroying the insulation characteristics of main electrical equipment, and achieves a highly deterministic effect.

Active Publication Date: 2017-05-31
STATE GRID ZHEJIANG ELECTRIC POWER CO LTD SHAOXING POWER SUPPLY CO +5
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The above operation sequence does not take into account the situation that the circuit breaker refuses to operate when closing and releasing the loop, and once the phenomenon of refusal to operate occurs, especially when the loop fails, the existing circulating current will start to affect the electrical mains in the loop. The equipment produces relatively serious thermal effects; if the ring is not released in time, the continuous thermal effect will affect or even destroy the insulation characteristics of the main electrical equipment, and the lighter ones will reduce the life of the main electrical equipment. If the thermal effect of the main equipment is seriously exceeded, it will cause electrical main equipment burnt down, causing massive power outages

Method used

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  • No-power-stoppage conversion circuit breaker set sequential control method for 30-degree angular phase difference power distribution lines
  • No-power-stoppage conversion circuit breaker set sequential control method for 30-degree angular phase difference power distribution lines
  • No-power-stoppage conversion circuit breaker set sequential control method for 30-degree angular phase difference power distribution lines

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Embodiment Construction

[0030] Such as figure 2 As shown, a partial network of a distribution network includes transfer incoming line JA3536, first incoming line to be transferred FL3637 and second incoming line to be transferred MB3556, wherein the incoming line JA3536 to be transferred, first incoming line to be transferred The supply and incoming line FL3637 is connected to the first substation A, and the second incoming supply line MB3556 is connected to the second substation B; in the first substation A, the 35kV bus M14 of station A is connected to the 35kV bus of station A through the bus tie circuit breaker M15 is connected, and the 35kV bus M15 of station A is connected with the 35kV bus M16 of station B through the tie line circuit breaker and tie line AB3556.

[0031] Such as image 3 As shown, the 30-degree phase angle difference power distribution line is transferred to the circuit breaker group sequence control method without power failure:

[0032] Step 1: Circuit breaker selection:...

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Abstract

The invention discloses a no-power-stoppage conversion circuit breaker set sequential control method for 30-degree angular phase difference power distribution lines. Through selecting a standby circuit breaker, a remedial measure on the condition of action rejection of a loop closing circuit breaker or a loop unlinking circuit breaker is realized. Through a method of sequentially controlling the circuit breakers, high definiteness is realized. The no-power-stoppage conversion circuit breaker set sequential control method is suitable for a 30-degree angular phase difference power distribution line loop-closing or loop unlinking occasion in high-speed communication.

Description

technical field [0001] The invention relates to a sequential control method for a power distribution line with a phase angle difference of 30 degrees to supply a circuit breaker group without power interruption, and belongs to the field of power grids. Background technique [0002] The distribution network of 110kV and below mainly realizes non-stop power supply transfer through the loop closure method, that is, when the distribution network is carrying out load transfer, equipment maintenance, and network reconstruction, the load is "heated" through the loop closure operation to reduce power outages time and improve power supply reliability. In some areas, the operation of closing and disassembling the power grid is very frequent, accounting for 48.1% of the daily operation items of dispatching. During the loop closing operation, the loop closing current generated by the voltage amplitude, phase angle, impedance and load difference on both sides of the loop closing point n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/02
CPCH02J9/02Y02B70/30Y04S20/20
Inventor 张亮朱炳铨杨才明陶鸿飞孙维真张静罗刚章坚民金乃正谢栋相炜杨剑峰陈鲁茹伟孙银雨
Owner STATE GRID ZHEJIANG ELECTRIC POWER CO LTD SHAOXING POWER SUPPLY CO
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