PROTECTION SYSTEM FOR DC POWER TRANSMISSION SYSTEM, AC/DC CONVERTER, AND DC POWER TRANSMISSION SYSTEM BREAKING METHOD

摘要

An AC circuit breaker (3) is provided between an AC system (1) and an AC/DC converter (5), and a DC circuit breaker (7) is provided between a DC line (6) and the AC/DC converter (5). A bypass switch capable of short-circuiting a converter cell constituting the AC/DC converter (5) is connected to the AC/DC converter (5). When an accident occurs on the DC line (6), the bypass switch is switched on to break the supply of DC power from the AC system (1) to the DC line (6).