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Frequency tracking-based phase selection control method for circuit breaker

A phase selection control and frequency tracking technology, applied in the direction of AC network voltage adjustment, etc., can solve the problem of low precision of circuit breaker phase selection control, improve power quality and reliability, reduce impact, suppress voltage distortion and overvoltage impact Effect

Active Publication Date: 2016-12-07
CHANGZHOU POWER SUPPLY OF JIANGSU ELECTRIC POWER +2
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Problems solved by technology

[0006] The purpose of the present invention is to provide a circuit breaker phase selection control method based on frequency tracking to solve the problem that the circuit breaker phase selection control accuracy is not good when the system voltage frequency deviates from the rated value and there is a large fluctuation. high problem

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  • Frequency tracking-based phase selection control method for circuit breaker
  • Frequency tracking-based phase selection control method for circuit breaker
  • Frequency tracking-based phase selection control method for circuit breaker

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Embodiment 1）

[0025] The circuit breaker phase selection control method based on frequency tracking in this embodiment, because the opening control process is similar to the closing control process, so only the closing control process is used as an example for illustration, assuming that the target control phase is the peak point of the system reference voltage.

[0026] See figure 1 and figure 2 , the circuit breaker phase selection control method based on frequency tracking in this embodiment includes the following steps:

[0027] ① Collect the system reference voltage in real time and calculate its frequency. After receiving the control system closing command, start the phase selection algorithm and track the current system reference voltage frequency. figure 1 In , it is assumed that the closing command of the control system is received at time T0.

[0028] ② According to the current tracked system reference voltage frequency, calculate the phase selection control waiting time by the...

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Abstract

The invention provides a frequency tracking-based phase selection control method for a circuit breaker. The frequency of a reference voltage of a system is calculated in real time; and after a breaking and making instruction of the control system is received, the influence of the current real-time frequency on waiting time of phase selection control is considered and is compensated and corrected, thereby realizing accurate control of phase selection breaking and making of the circuit breaker. According to the method, the influence of system voltage frequency fluctuation on calculation of the waiting time of the phase selection control is considered, so that the phase selection control precision when the frequency of the reference voltage of the system deviates from a rated value can be effectively improved, the correctness of actions of a phase selection device can be enhanced, and accurate switching of the circuit breaker can be finished under the condition of relatively small transient impact of a power grid.

Description

technical field [0001] The invention relates to the technical field of intelligent control of a circuit breaker in a power system, in particular to a phase selection control method for a circuit breaker based on frequency tracking. Background technique [0002] The development of intelligent primary equipment technology is of great significance to realize the informatization, automation and interaction of primary equipment, improve the manufacturing level of electrical equipment, and optimize the design of the entire intelligent substation structure. The intelligentization of high-voltage switchgear is an important part of the realization of intelligent primary equipment, and the phase selection control technology, as an important aspect of the intelligentization of primary switchgear, can realize the phase-fixed control of circuit breakers, or improve its breaking capacity, and can be used in no-load lines. , No-load transformers, capacitors, reactors and other power equipm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/12
CPCH02J3/12
Inventor 曹良张雄伟徐懿李海涛须雷朱继红
Owner CHANGZHOU POWER SUPPLY OF JIANGSU ELECTRIC POWER
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