| Thyristor-controlled series capacitor (TCSC) and static var compensator (SVC) are two important members of flexible AC transmission system (FACTS) family, and have being widely used in power system. This dissertation works to design and realize TCSC/SVC experimental prototype, including following contents: Fisrt, gives the main circuit secheme of the prototype, which can simulate single-modul TCSC, double-modul TCSC and SVC operation modes, to shift from one mode to another only need simple switching operation. Seconde, designs the control system based on high-speed CPU card and high-accuracy DSP card, which enables 200μs supervisory peroid. Third, Developes the software for the control system, providing opening data and program interfaces. Forth, the basic experimentes of TCSC and SVC, such as step responses and operational region switches, are employed to test the prototype, the circuit configurations and results of the experiments are discussed in detail. Finally, based on the established prototype, by inter-connectting the controller with real-time digital simulator (RTDS), elementary simulations are implemented to test the feasibility and validity of the digital-analog hybrid real-time simulation system, the circuit configurations and results of the simulations are also presented. This dissertation presents a parallel APF based on asymmetry cascaded multi-level inverter (ACMI), which has good waveform tracing capability and compensation characteristics. Current control strategies for the parallel hybrid APF (PHAPF) are mainly based on harmonic current feedback, which may deteriorate the voltage distortion at the load bus. To solve this problem, the dissertation proposes a new control strategy based on load harmonic voltage feedback to optimize the load voltage waveform, and compensate reactive power and harmonics at the same time. Digital simulations are employed to verify the feasibility and validity of the proposed parallel APF and the control strategy for PHAPF.
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