AN APPLICATION STUDY FOR SIZING AND RATING CONTROLLED AND CONVENTIONAL SERIES COMPENSATION

A step by step method for determining controlled and conventional seri es compensation requirements is developed. The Montana 500kV transmiss ion system is taken as an example in this study. A base transfer ratin g of 2200MW for the system already exists, and it is assumed that as i ts power loading increases, controlled series compensation is needed t o reinforce the system. Combination of conventional and thyristor-cont rolled series compensators (TCSCs) is considered as a means of increas ing the system transfer capability. Powerflow and transient stability studies are performed to rate and size the series compensators. The TC SC reactance control capabilities are established for steady-state and transient conditions. An installation sequence is developed relating facility requirements to system loading.