超高压磁控式并联电抗器稳态特性

介绍了500 kV磁控式并联电抗器(magnetically controlled shunt reactor，MCSR)的结构特点；阐述了MCSR的工作机理和稳态特性，并进行了试验验证。理论与试验表明，MCSR具有分段的伏安特性：在一定励磁条件下且电压较低时，MCSR电压、电流呈线性关系，随着电压的升高，电抗器电流增加的速度趋缓，MCSR进入恒流区；MCSR网侧绕组内几乎不含3k次谐波电流成分，各容量下各次谐波电流有效值不大于额定基波电流的3%；MCSR基波容量随着直流励磁电流的增加而单调增加，呈现略带饱和的线性关系，具有优越的控制特性。MCSR具有容量大范围连续可调、谐波含量小、稳态控制特性好的性能特点，可有效协调超高压、特高压电网限制过电压与无功补偿之间的矛盾，有着广阔的应用前景。

Steady-state Characteristics of Extra-high Voltage Magnetically Controlled Shunt Reactor

The structural features of magnetically controlled shunt reactor (MCSR) are presented. The operating mechanism and steady-state characteristics of MCSR are discussed and verified by experiments. The proposed principle and field experimental results show that MCSR has segmented voltage-current characteristic: under specific exciting condition and low voltage, the current is in proportion to voltage, while with the increase of voltage, the variation of current is less and MCSR goes into constant current region; the harmonic currents of 3k order which have the characteristics of zero sequence are very small in primary windings, and the amplitude of harmonic current of each order is not more than 3% of fundamental rating current; the fundamental capacity of MCSR monotonically increased with DC exciting current presenting linear relation with a little saturated characteristic which is suitable for control. MCSR is continuously controllable in wide capacity range, low in harmonic contents, attractive in steady-state control characteristic, can harmonize the contradiction between over-voltage depression and reactive power compensation in extra and ultra high voltage grid effectively, and has broad application prospect.