The issues of compensated high voltage power cable lines’ switchings by the example of CL 330 kv yuzhnaya - pulkovskaya DC components of SF6-insulated circuit breakers

Abstract

Nowadays SF6-insulated circuit breakers are the most widely used breakers for extra high voltage grids. Operational experience has shown that they are incapable of making fast switching of power transmission lines equipped with shunt reactors due to zero-missing phenomena in case the coefficient of line charge capacity compensation is sufficiently high. Though the necessity of development of measures for prevention of breaker damage in overhead lines is quite clear, not enough attention is given to the compensated power cable lines. The problem is considered using the example of330 kV cable line Yuzhnaya -Pulkovskaya.

Keywords

• dc component
• zero missing phenomena
• sf6 circuit breakers
• cable lines
• shunt reactors