| 摘要 |
PROBLEM TO BE SOLVED: To improve control precision of a DC power transmission system to which a capacitor commutation converter is applied, and realize cost reduction of equipment. SOLUTION: In the control equipment of a DC power transmission system in which converters 2a, 2b on the power inverter side are constituted of at least two capacitor commutation converters, a control means 10 which controls a converter current to be a previously designated constant value is installed on the power rectifiers 1a, 1b side, and a control means 20 is installed on the power inverter side. The control means 20 consists of a load side synchronous signal forming means 206 for setting the frequency of a load side AC system, a control angle commanding means 203 for controlling at least one power inverter 2a to be in a fixed control angle, a constant voltage control means 202 for controlling the voltage of a load side AC system to be a designated value, and a control angle command value control means 205 for controlling the control angle of the residual power inverter 2b on the basis of deviation between the control angle commanding means and the constant voltage control means, and controls the control angle of the residual power inverter in such a manner that the voltage of the load side AC system becomes the designated value. |
