| 摘要 |
PROBLEM TO BE SOLVED: To compensate reactive power by inputting the voltage and current information obtained with a transformer and a current transformer connected to a power system into a reactive power compensator which performs the decision-theory based short-term estimation control of reactive power, and controlling the decision-theory based short-term estimation, and supplying the estimation control output to a reactive power compensator. SOLUTION: Load 3 is connected to the power system 2 connected to an AC power source 1, and also a reactive power compensator body 4 is connected to it. The information detected with a transformer 5 and a current transformer 6 is inputted into a reactive power estimating function part 7, and the output is given to the thyristor of the reactive power compensator body 4, and the thyristor is controlled. The reactive power compensator body 4 is composed of a transformer 4A, a capacitor 4B, a reactor 4C, and a thyristor 4D, and the reactive power compensating current is supplied to the power system 2 through the transformer 4A. Hereby, at the time of compensation of reactive power, estimation control can be adopted, and effective compensation can be made. |
