Single-phase adaptive reswitch-on comprehensive criterion realizing method for transmission line

A technology of transmission lines and implementation methods, applied in circuit devices, emergency protection circuit devices, electrical components, etc., can solve the problems of small fault phase recovery voltage, misjudgment, misjudgment of voltage criterion, etc., and achieves the effect of a wide range of applications

Inactive Publication Date: 2005-06-08
TIANJIN UNIV
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Problems solved by technology

[0004] Single-phase adaptive reclosing technology has been developed for more than ten years, and many theoretical achievements have been made. The typical one is the voltage discrimination method. This method solves the single-phase adaptive reclosing problem of lines without parallel reactor compensation, but there are also errors possi...

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  • Single-phase adaptive reswitch-on comprehensive criterion realizing method for transmission line
  • Single-phase adaptive reswitch-on comprehensive criterion realizing method for transmission line
  • Single-phase adaptive reswitch-on comprehensive criterion realizing method for transmission line

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Embodiment Construction

[0015] In order to overcome the shortcoming of using only the voltage amplitude as the reclosing action criterion in the prior art, the present invention proposes a method for comprehensively judging multiple criteria to control the reclosing action. The multiple criteria include voltage-based Voltage criterion, compensation voltage criterion, combined compensation voltage criterion and phase criterion based on the principle of phase judgment based on the amplitude principle; complementary judgment methods are adopted between each criterion, and the comprehensive criterion process of single-phase self-adaptive reclosing like figure 1 Shown: first, use the voltage criterion to judge, step 401; judge whether a transient fault occurs in the line at this time, step 402; ; Utilize the compensation voltage criterion to judge, step 403; Judging whether a transient fault occurs in the line at this time, step 404; Combination compensation voltage criterion judgment, step 405; Judging ...

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Abstract

This invention is a realizing method of transmitting line unilateral auto-conforming reclosing comprehensive judging evidence, based on voltage evidence, compensation voltage evidence, combination compensation voltage evidence and phase evidence. The characteristics are: if the transmitting line is the instantaneous trouble, the above four evidences judge the trouble character; when the transmitting line has general instantaneous trouble, the voltage evidence judges the trouble character; when the transmitting line occurs low off voltage trouble, the compensation voltage, combination compensation and voltage evidences judge comprehensively, as to the heavy service and long-distance transmitting line or the line with parallel reactor, the phase evidence judges the trouble; if the transmitting line occurs permanent trouble, judge whether carrying out reclosing operation according to the results of comprehensive judgment of the four evidence judging.

Description

technical field [0001] The invention relates to an automatic reclosing control method of a transmission line in a power system, in particular to a method for realizing comprehensive determination of single-phase self-adaptive reclosing of a transmission line. Background technique [0002] Automatic reclosing technology, as one of the important measures to ensure the safe power supply and stable operation of the power system, is currently widely used in overhead transmission lines. The purpose of using automatic reclosing is to automatically put the line back into operation after the transient fault is eliminated, and restore the normal operating state of the system in the shortest time. However, the current automatic reclosing device blindly recloses after the circuit breaker trips, and it cannot judge whether the fault is a transient fault or a permanent fault. Therefore, when a permanent fault occurs, not only cannot the normal power supply of ...

Claims

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Application Information

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IPC IPC(8): H02H3/06H02H7/22
Inventor 李永丽李斌
Owner TIANJIN UNIV
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