| 摘要 |
A control system for controlling an operation of a hydroelectric turbine (10) is disclosed. The control system comprises a converter system (20) to convert AC power, supplied by a generator (18) connected to the turbine (16), and having a voltage and frequency that is a function of a rotational speed of the turbine (16), to AC power having a voltage and frequency of a transmission system for transmitting the AC power to a receiving station. The system further comprises a control unit (32) that is arranged to co-operate with the converter system to adjust the AC voltage supplied by the generator in response to a water flow speed through the turbine to thereby control rotation of the turbine (16). The converter system comprises a first-stage converter (26) and a second-stage converter (28), with a DC link provided between the first and second-stage converters. The first-stage converter (26) is arranged to convert the AC power supplied by the generator to DC power. The second-stage converter (28) is arranged to convert the DC power to the AC Power for transmission to the receiving station and the second-stage converter (28) is of a current-source inverter type. |
