Reactive Power Compensation Controller In DSP And FPGA-based Research And Development

In the power system, the use of power equipment and power electronic devices willconsume a large amount of reactive power, causing the power factor decreases, the voltagefluctuation, flicker, unbalanced three-phase and so on.the purpose of this study is basedchangeto construct a stable system of the reactive current, accurate and timely reactive compensationin order to ensure the normal operation of the power grid or power equipment.First analysis of reactive power compensation principle, TCR (thyristor controlledreactance) of the principle of the main circuit and TSC (Thyristor Switched Capacitor) theprinciple of the main circuit, and on this basis, analysis of the harmonic of the maincircuitwave, calculate of compensation capacity. Based on the technical characteristics of theTSC+TCR type of SVC main circuit, the use of thyristor controlled capacitor switching,full realizate of the capacitor, no arc, no impact to fast switching. Regulate TCR thyristortriggering delay angle to continuous rapid adjustment of reactive power compensation deviceoutput. TSC for grading the coarse compensate the capacitive reactive; TCR for the phasedfine-tune compensate of inductive power. Both coordination and control, can achieve asmooth adjustment of reactive power.Based on features for the TSC+TCR type of SVC circuit control, the controller part ofthe basic use closed-loop voltage control, and design of a control circuit based on DSP andFPGA.With the speed and the calculation of the powerful features of the DSP and applicationof fast Fourier transform algorithm theory,the controller can Real-time detect and treat ofelectrical parameters, and can achieve simultaneous control of multiple trigger signals, thetransformer secondary side over pressure limit, TCR over-current control, the undervoltageprocessing and TCR DC current control and manual control.SVC in balance control and imbalances were used as the system compensation and loadcompensation both cases. respectively, with PSCAD simulation and experiment in the SVCprototype of the system hardware and software design and control method based onsimulation and experimental resultshas theoretically the feasibility and practical realization.