| 摘要 |
PROBLEM TO BE SOLVED: To control generation of an eddy current in a self-excitation power converter. SOLUTION: The circuits 13B, 15B for dividing a d-axis voltage command value DdF, q-axis voltage command value VqF generated in a dq vector control system and impressed to a PWM circuit 40 with a DC voltage Ed of a capacitor 4 at the time of generation thereof are provided in the self-excitation voltage type semiconductor converters 41, 42, that are operated in parallel with the power system 1 to control the effective power and reactive power. Since the converter outputs Vi1, Vi2 do not depend on a DC voltage Ed, when Ed is lower than the rated value at the time of recover from an accident, there is no voltage difference from the system 1 and therefore generation of eddy current can be avoided. |
