Under the presupposition that the demand of reactive power compensation is met,an approach to eliminate harmonics of offshore platform power system by use of thyristor switched filter is given; based on the place measured harmonic data and by use of genetic algorithm the optimal design of parameters of thyristor switched filter is performed.

Using a Static Var Compensator (SVC) composed of athyristor controlled reactor (TCR) and thyristor switched capacitors (TSCs) to provide dynamic var compensation isefficient to solve above problems.

Based on the TSC ( thyristor switched capacitor ) technology,the fully adjustable parallel capacitor compensation mode has good compensational effect.

In order to compensate more reactive power and lower the power level of the active power filter(APF),a hybrid filter system based on a combination of the APF and the thyristor switched capacitor(TSC) was presented.

The Trigger Circuit for Thyristor Switched Capacitor(TSC);

<abstract>is paper presents a general introduction of TSC and then explains the four connecting models of the TSC main circuit.

The paper introduces the technology of thyristor switched capacitor(TSC)used in the distribution systems to compensate dynamic reactive power.

This paper analyzes the fault causes for incomplete phase continuity of transistor in the reactive power compensation system of TSC,and presents some c orresponding countermeasures to prevent the faults.