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Operating Principle
The PCS-9578 CSR system consists of a controllable shunt reactor and a control and protection system, which is used to control and protect transformer and reactors in the valves. The controllable shunt reactor is composed of main part and controllable part. Main part is a high leakage impedance transformer. Controllable part consists of supplementary reactors and composite switches. Under normal operating conditions, the absorbed power is graded to several levels and changes step-by-step according to the whole impedance of controllable part.
The output power level of the CSR is adjusted by switching the supplementary reactor. Each level power is determined by a settled status of switches. High level indicates that the CSR system absorbs more inductive reactive power from grid. Normally the output power gap between two adjacent levels is identical. Controllable shunt reactor changes one or more than one levels at one time according to control and protection system.
