Abstract
It has great significance for the capacitor reactive power compensation device to improve the quality of the power system voltage and reduce the line loss. This paper proposes a reactive power compensation measurement and control device scheme that integrates reactive power compensation with microcomputer protection function, it also can cover the shortage of the microcomputer relay protection of parallel capacitor reactive power compensation system, the whole system is linked by the RS485 bus. The paper mainly introduces the hardware design around the STM32 series micro controller. And then introduce the design of the software on main programming algorithm of parameter measurement, communication protocol and capacitor protection configuration and the criterion of the major programming algorithm.
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