Automatic tuning control method of arc suppression coil by compensation susceptance incremental method

Abstract

An automatic tuning control method for compensating susceptance incremental method arc-suppression coil, wherein the arc-suppression coil is judged as ''main tuning'' machine or ''non primary tuning'' machine based on the bar coupler off-on state on the time of feeding the arc-suppression coil. Unbalanced voltage of electric network, electric network phase electric potential and compensation current of the arc-suppression coil are then measured; the controller controls toned arc-suppression coil, and a compensation susceptance increment is applied to the electric network, then the unbalanced voltage of electric network, the electric network phase electric potential and the compensation current of the arc-suppression coil are measured again, further a required compensation current outputted by the ''primary tuning'' arc-suppression coil for the ''whole compensation'' of the electric network is calculated. When the electric network running normally, the variation of the electric network unbalance degree is monitored real time through the increment value of the electric network neutral point unbalanced voltage, and the ''primary tuning'' or ''non primary tuning'' machine status of the tuning-controlled arc-suppression coil are altered based on the various, or the required compensation current outputted by the ''primary tuning'' arc-suppression coil for the ''whole compensation'' of the electric network is calculated again.

Description

technical field [0001] The invention relates to a measurement and control method in the field of electrical technology, in particular to an automatic tracking and tuning control technology for an arc suppression coil grounding system. Background technique [0002] With the increase of the power grid scale and the extensive use of cables in the distribution network, the capacitive current of the system shows a trend of increasing. Therefore, the capacity of the arc suppression coils originally installed in the power grid cannot meet the requirements, and new arc suppression coils are constantly being used. This is the main reason for the parallel operation of multiple arc suppression coils in the same grid; in order to improve the power supply reliability of the distribution network, the parallel operation of the busbars has become a common operation mode of the system, resulting in the simultaneous operation of multiple arc suppression coils The second reason for the paralle...

AI Technical Summary

Problems solved by technology

[0003] There are a variety of automatic tracking and tuning control methods for arc suppression coils, such as maximum value method, impedance triangle method, phase method, two-point method and injection variable frequency signal method, etc., which have been used for stand-alone tuning of arc suppression coils in my country's distribution network control, but there is no relatively mature method for tuning measurement and control of multiple arc suppression coils running in parallel with the grid. This invention proposes a tuning measurement and control method for multiple arc suppression coils running in parallel with the grid. Taking into account the single-machine tuning control of the arc-suppression coil

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