Electric Field Calculation For Hybrid Hvdc Circuit Breaker

The electric field distribution characteristic of +/- 535kV hybrid HVDC circuit breaker is calculated with the finite element analysis method for electrostatic. The electric field of the component and shielding system is calculated by adding the DC withstand voltage test voltage, and the electric field of valve support is calculated by adding the valve support DC withstand voltage test voltage. Calculation results show that the maximum electric field of +/- 535 kV HVDC circuit breaker tower is 2.748kV/mm which meets the requirements of electric control value 3kV/mm. The conclusion provides a support for insulation structure design of the +/- 535 kV hybrid HVDC circuit breaker, which has important reference value.