| 摘要 |
This invention relates to electrical engineering and is particularly suitable for use as a controlled system to regulate and automatically stabilize voltage and to compensate for reactive power in high-voltage power systems irrespective of the voltage class. The object of the present invention is to increase the efficiency and reliability of the static reactive power compensator equipment by extending the continuous capacity control range from rated capacitive to rated inductive, reducing installed capacity of the capacitor banks and eliminating overload of the filtering devices by higher harmonics This object is accomplished by the static reactive power compensator which includes a controlled inductor, a capacitor bank and a higher harmonic filtering device and in which, according to the invention, the controlled inductor is, essentially, a double-winding transformer with a core saturation control circuit, wherein the rated input resistance of the transformer is 1.5 to 6 times as high as the sum of the inductive resistances of the windings thereof adjusted to the rated voltage, and a higher harmonic filtering device is, essentially, a filter compensating device the rated capacity of which is one tenth to half of the rated capacity of the capacitor bank, and the sum of rated capacities of the filter compensating device and the capacitor bank connected to the low-voltage secondary winding equals the rated transformer capacity. As compared with the prior art and closest prior art, the claimed invention has an extended range of continuous capacity control, - from the rated capacitive mode to the rated inductive mode without disconnecting the capacitor bank, a lower installed capacity of the capacitor banks, a practically sinusoidal current and no filter device overload by higher harmonics. Working efficiency of the claimed static reactive power compensator is verified by calculations, physical and mathematical simulation and dummy testing. |
