Abstract： IEC 60143-4:2010 pdf free download.Series capacitors for power systems- Part 4: Thyristor controlled series capacitors. 4.6 SSR mitigation When properly designed and applied, TCSC can provide a degree of SSR mitigation when operated with a...

IEC 60143-4:2010 pdf free download.Series capacitors for power systems- Part 4: Thyristor controlled series capacitors.

4.6 SSR mitigation

When properly designed and applied, TCSC can provide a degree of SSR mitigation when operated with a boost factor greater than one. The TCSC can help mitigate the resonant SSR series combination that results from fixed series capacitors.

If the TCSC application requires that SSR concerns be addressed, it is recommended that studies be performed involving detailed

models of the power system, the nearby turbine generators and the TCSC. This recommendation is heightened in situations when the

power system Includes a combination of fixed series capacitors and TCSC and the combined series compensation exceeds 50 %. If the

studies indicate that fixed series capacitors with the desired level of compensation will result in an SSR prob’em, the TCSC

supplier shall be actively involved in the SSR studies.

A TCSC can only provide SSR mitigation if the valves are firing on a continuous basis. The result is that for the TCSC to meet the SSR mitigation objectives its operating region must be constrained to a boost factor equal to or greater than the minimum value at which it provides the desired SSR-mitigation.

Recommended：