METHOD AND SYSTEM FOR CONTROLLING HYDROELECTRIC TURBINES

摘要

A control system for controlling an operation of a hydroelectric turbine. The control system comprises a converter system to convert AC power, supplied by a generator connected to the turbine, and having a voltage and frequency that is a function of a rotational speed of the turbine, 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 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. The converter system comprises a first-stage converter and a second-stage converter, with a DC link provided between the first and second-stage converters. The first-stage converter is arranged to convert the AC power supplied by the generator to DC power. The second-stage converter is arranged to convert the DC power to the AC Power for transmission to the receiving station and the second-stage converter is of a current-source inverter type.

主权项

1. A control system for controlling an operation of a hydroelectric turbine, the control system comprising:
a converter system, arranged to convert AC power, supplied by a generator connected to the turbine, and having a voltage and frequency that is a function of a rotational speed of the turbine, to AC power having a voltage and frequency of a transmission system for transmitting the AC power to a receiving station; the system further comprising a control unit, the control unit being co-operable 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, wherein the converter system comprises a first-stage converter and a second-stage converter, with a DC link provided between the first and second-stage converters, the first-stage converter being arranged to convert the AC power supplied by the generator to DC power, and the second-stage converter being arranged to convert the DC power to the AC Power for transmission to the receiving station; and wherein the second-stage converter is of a current-source inverter type.