A Novel Static Dynamic Var Generator Device and Method

Abstract

The invention discloses a novel static dynamic reactive generator device, which comprises a starting cabinet, a power cabinet, a control cabinet and a reactor, wherein the power cabinet, the starting cabinet and the reactor are sequentially connected in series and then connected in parallel with a power grid; a generatrix charges a direct current capacitor through a bypass resistor R; the turn-on and turn-off of an insulated gate bipolar transistor (IGBT) are controlled by pulse width modulation (PWM) pulse from the control cabinet; and the direct current voltage of each of two ends of the direct current capacitor is inverted into alternating current voltage, and the frequency, amplitude and phase of the alternating current voltage are controlled by turn-on and turn-off of the IGBT, so current is generated and then injected into a system through a reactor L, and the output reactive regulation of the whole device is realized. The novel static dynamic reactive generator device is high in response speed and convenient to use and maintain, the voltage of the power grid is stabilized, system loss is reduced, transmission capacity is improved, a transient voltage limit value is increased, harmonic is reduced, occupation area is reduced, and production cost is reduced.

Description

technical field [0001] The invention relates to a power electronic detection and control device applied in a power system, in particular to a novel static dynamic var generator (ASDVG). Background technique [0002] With a large number of non-linear loads such as modern power electronic equipment connected to the power grid, the power supply quality of the power grid is seriously affected. Among them, the large number of applications of various power electronic switching devices and frequent fluctuations in loads are the main sources of interference, resulting in a series of bad Affected, electrical equipment cannot work normally. At present, parallel passive filters and static dynamic reactive power compensation SVC devices are usually used to suppress harmonics and compensate reactive power, but there are key points such as long response time, poor filtering ability, easy resonance with the grid system, and large footprint. Sexual defects. Contents of the invention [...

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Problems solved by technology

[0002] With a large number of non-linear loads such as modern power electronic equipment connected to the power grid, the power supply quality of the power grid is seriously affected. Among them, the large number of applications of various power electronic switching devices and frequent fluctuations in loads are the main sources of interference, resulting in a series of bad Affected, electrical equipment cannot operate normally

At present, parallel passive filters and static dynamic reactive power compensation SVC devices are usually used to suppress harmonics and compensate reactive power, but there are key points such as long response time, poor filtering ability, easy resonance with the grid system, and large footprint. sexual defect

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