Topological Research of Static Reactive Compensator Based on Diode Clamp Multilevel Converters
Static reactive compensator has the characteristics of fast adjustment speed,high reliability and high safety in real-time dynamic reactive power compensation.It has been widely used in the reactive power balance sys-tem of the power grid.It can improve the power quality of the power grid,ensure the voltage stability of the power grid,and improve the transmission capacity,transmission efficiency and transmission reliability of the power grid.One of the core of the static reactive compensator is the topology structure of its main circuit converter.This paper introduces the topology and modulation strategy of the static reactive compensator composed of diode clamp multilev-el converter,introduces the working principle of the topology,and the output waveform.The topology has the advan-tages of simple structure,easy connection and easy implementation,but its level number is not too much.Then this paper also introduces PWM modulation technology suitable for this topology.Finally,a simulation model is built in the simulation software.The results show that the topology can realize dynamic real-time reactive power compensa-tion and improve power quality.
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