Control method for high-power reactive and harmonic dynamic hybrid compensation system

Abstract

The invention discloses a control method for high-power reactive and harmonic dynamic hybrid compensation method. The hybrid compensation system comprises an SVG (static var generator), a TSF (thyristor switched filter) group and a controller, and the SVG and TSFs are parallelly connected to a grid. The three-phase current of the grid between the SVG and the TSFs is taken as a detection object, voltage and current values collected by sensors are processed through the controller, switching signals of the TSFs are acquired according to hybrid logic judgment, most of the reactive power of loads is compensated in a graded manner, and specific subharmonic is filtered out; control parameters of the SVG are acquired according to an instantaneous-power theory, and the surplus reactive power and harmonic of the loads are continuously compensated. A cost-effective scheme for rapid continuous compensation of the high-power reactive and harmonic is provided, impact of switching of passive equipment on the grid can be completely avoided, and harmonic current is avoided flowing to the grid, so that the control method is energy saving, emission reducing, green, environment friendly, good in social and economical effectiveness, wide in application range and especially applicable to the field of oil drilling.

Description

technical field [0001] The invention relates to a control method of a high-power reactive power and harmonic dynamic hybrid compensation system, which belongs to the field of power systems, is suitable for harmonic control and reactive power compensation of power grids, and is especially suitable for application in fields such as oil drilling. Background technique [0002] As power electronic devices are widely used in industrial and civil occasions, such as oil drilling rigs, rolling mills, electric arc furnaces, electrified railways and port cranes, a large amount of harmonic current and reactive power are injected into the grid, causing grid voltage drops and low power factors etc. The existence of harmonic current and reactive power in the power grid not only increases the line loss of the power grid, but also brings great harm to some precision equipment that requires high power supply quality, and also brings great harm to the safe and stable operation of the power gri...

AI Technical Summary

Problems solved by technology

Since the device only detects the load current, the inrush current when the TSC is switched and the specific harmonic current when connected to the grid will flow into the grid and cannot be compensated; moreover, when a TSC fails and is not switched on or off, it will also As a result, TSC cannot cooperate with SVG and cannot fully compensate the load reactive power

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