| 摘要 |
Improved control of a var generator of the static type using thyristors wherein control is accomplished by generating a capacitance command representing the value of an equivalent capacitor, as opposed to a current command or a var command. The gating times or angles of the thyristors are determined by the capacitance command acting through an intermediate control which may be an open-loop feed-forward control or a closed loop feedback control operating in response to the difference between the capacitance command and a capacitance feedback, or a combination of both these types of control. The effect of the capacitance control is to provide an improved response of the var generator for changes in source voltage or frequency. The capacitance control also provides an improved linearity of control. |
