| Reactive power compensation is one of the potent methods of maintaining the effective and reliable operation of the electric power system. A DSP (Digital Signal Processor)controlled Thyristor Switched Capacitor(TSC) system is designed based on TMS320LF2407A for the present electrical power market.The paper mainly includes the followed parts: the principle of the TSC, Simulation to the System, the control method and principle of reactive power compensation device and the hardware and software design of the device. In hardware design, TMS320LF2407A DSP is used in the controller, which carries out the function such as sampling and calculating etc. The device has many merits such as high operating speed and high real-time. The thyristor is adopted as switch to connect capacitors to main circuit, which actualizes the capacitor's speediness, no arc, no impact switching, and has superior performance. The C and assemble languages are both used in the software design. Mention of switching law, control method reactive power and power factor, comparing with familiar control method considering power factor, avoids oscillation on the condition of light loading. In order to realize system's required function, this paper designs and realizes comparatively integrate microcomputer controlled circuit and its peripherals circuit. The whole controlling program of the system is designed, and the controlling software structure flow chart is given as well. Results reveal that both the hardware and the software are of reasonable design, the control method is feasible and the system runs reliably. The device can realize the function anticipated. |
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