Harmonic control method and device for magnetron high voltage shunt reactor

Abstract

The invention relates to a harmonic control method for a magnetron high-voltage shunt reactor, comprising: according to a preset curve, adjusting a parameter value related to the preset curve in a direction in which the harmonic current of the magnetron high-voltage shunt reactor decreases ; judging whether the harmonic current and / or the parameter value satisfies a preset condition; and in response to the judgment result that the harmonic current and / or the parameter value satisfies the preset condition, stop adjusting the parameter value. The invention also relates to a harmonic control device for the magnetron high-voltage parallel reactor. According to the harmonic control method and device of the magnetron high-voltage shunt reactor disclosed in the present invention, in the case of a filter bank failure, the influence of the magnetron high-voltage shunt reactor on the harmonics of the system can be reduced, and the magnetic control can be maintained to the maximum extent. The controlled high-voltage shunt reactor continues to operate on the grid.

Description

technical field [0001] The invention belongs to the technical field of electrical engineering, and in particular relates to a harmonic control method and device of a magnetron high-voltage shunt reactor. Background technique [0002] The magnetron high-voltage shunt reactor is a new type of flexible AC transmission system (Flexible Alternative Current Transmission System, FACTS). , so as to achieve the function of regulating reactive power. Usually, the control system of the magnetron high-voltage shunt reactor takes the system voltage or the reactive power of the reactor as the target, performs closed-loop adjustment, and continuously adjusts the control winding current to maintain the voltage or the reactive power of the reactor at the target reference value, which can be dynamically compensated. Capacitive reactive power of transmission lines, suppress the capacity rise effect, power frequency overvoltage and submerged supply current of EHV / UHV transmission lines, and im...

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Problems solved by technology

[0005] If the filter bank is abnormal and exits due to failure, the reactor system can operate without the filter bank in a short period of time, but it may have a large harmonic impact on the system, causing harmonics to exceed the standard or affecting the normal operation of peripheral equipment; You can choose to directly withdraw from the entire magnetron high-voltage shunt reactor system to avoid the influence of harmonics on the system, but this method will cause an increase in system voltage, a decrease in system stability, and at the same time a decrease in the safety margin of system voltage operation. In severe cases May cause system voltage to exceed normal safe operating range

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