Innovations for protection and control of high voltage capacitor banks on the Virginia power system

This paper describes capacitor bank design, transient studies, protective relaying considerations, and operating experience. Associated with an application of high voltage capacitor banks. A 500 kV capacitor application and a 230 kV fuseless capacitor bank are presented as examples of developments in the design and protection of shunt capacitor banks. In addition, this paper presents the most significant findings of a large transient study completed to evaluate the impact of the 500 kV application. Operation experience is presented for a 500 kV zero voltage closing relay in combination with a preinsertion resistor used for transient suppression during closing. Analysis of a restrike failure of a 500 kV arrester is discussed along with field testing of a fuseless capacitor bank