| 摘要 |
The invention concerns a voltage source converter (10) having director valve phase legs in parallel with waveshaper phase legs between two DC terminals (DC1, DC2), where the director valve and waveshaper phase legs comprise upper and lower phase arms (V1A, V2A, V1B, V2B, V1C, V2C, WS1A, WS2A, WS1B, WS2B, WS1C, WS2C) alternately operated to form waveshapes on AC terminals (ACA1, ACA2, ACB1, ACB2, ACC1, ACC2) of the converter, thereby allowing a number of waveshaper phase arms (WS1A, WS2A, WS1B, WS2B, WS1C, WS2C) to be available for use for other purposes, where at least one of the available phase arms is controlled to contribute to other aspects of converter operation than waveshaping. |
