Abstract
With the rapid development of science and technology, large impact loads are widely used
in industry and life, because these loads are mostly presenting perceptual, which have lots of
negative effect on power quality problems, such as voltage fluctuation and flicker of power
grid. We decided to use the reactive power compensation to solve the problems in this case. In
fact, the reactive power compensation has appeared in the twenties of the 20th century, we have
found numerous ways of compensation now. But taking the economical and the technical
factors into consideration, the Thyristor-Switched Capacitor (TSC) is the most cost-effective
way undoubtedly, so the main purpose of this paper is that design a TSC reactive power
compensation device based on single-chip static switching controller to ensure power quality.
The basic theory and control strategy of reactive power compensation is described in the
paper, and then the hardware and software of the prototype device of reactive power
compensation is designed. The hardware part uses STC12C5A60S2 as the main controller, the
STC12C5A60S2 is a MCU of dual serial integrated internal reset circuit, it can make some
simple the data processing and storage, measurement of voltage and current, reactive power
compensation and automatic switching on or off control. Software design obey the principle of
modular design by the C language programming , to ensure that the system has a stable software
control system; Hardware realizes the communication function with computer based on
Kingview. When the power factor is lower than the normal value, system realize TSC reactive
power compensation by main controller, to remain power factor in the normal range, which is
helpful for getting reliable electrical energy.
Finally, comparing the design scheme with the actual compensation effect, and making
some summaries about the design to lay the foundation for the further development of reactive