The Research Of Integrated Parallel Static Var Generator Based On DSP

The integrated parallel var generator program (ISVG) includes Static Var Generator (STATCOM) and TSC+TCR.which improves the performance of the compensation system, and greatly reduces the cost of the system. According derivation of the inverse system of the three-phase VSC converter, and construct a pseudo-linear system. There is a better decoupling control of the q-axis current and DC voltage. Current inner ring and outer voltage bicyclic that designed improve the response speed, enhanced robustness.Good voltage and current good follower characteristics and harmonic suppression better solve the voltage drop compensation design and reliable solution to the grid voltage unbalance of power quality problems, namely that the voltage loop The band rejection filter to filter out the second harmonic voltage. Affected by electromagnetic transient process, or will affect the quality of the output voltage to achieve the complete elimination of the effect of the third harmonic way to optimize the switching function. According to the instantaneous power balance principle, design the fundamental negative sequence voltage feed forward control grid negative sequence voltage all landed in the auto-transformer leakage inductance and the filter impedance.In the experimental section through the grid voltage balance of reactive power compensation, power factor units such problems; the Electric Grid imbalance can not be resolved in-kind experiment Matlab simulation to prove the author’s vision.Designed system is perfect,it has a good behavior on switching between balanced grid voltage、 unbalanced grid voltage. The effect is obvious, the system is stable, good physical experiments and simulation proved the point.