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Function of filter and current limiting significance of reactor【皇冠手机登陆网址
滤波器作用以及电抗器的限流意义
With the expansion of the grid capacity, the rated value of the system short circuit capacity increases rapidly. For example, at the low voltage 35kV side of the 500kV substation, the maximum RMS value of the three-phase symmetrical short-circuit current is close to 50kA. In order to limit the short circuit current of transmission line and protect power equipment, the reactor must be installed. The reactor can reduce the short-circuit current and keep the voltage of the instantaneous system unchanged.
皇冠手机登陆网址:电网容量的扩大,使得系统短路容量的额定值迅速增大。如在500kV变电所的低压35kV侧, 最大的三相对称短路电流有效值已经接近50kA。为了限制输电线路的短路电流,保护电力设 备,必须安装电抗器,电抗器能够减小短路电流和使短路瞬间系统的电压保持不变。 
The damping reactor (Series Reactor) is installed in the capacitor circuit, and the inrush current is restrained when the capacitor circuit is put into operation. At the same time, the harmonic loop is formed with the capacitor bank, and the filtering effect of each harmonic is obtained. The capacitor circuit in 500kV substation of 35kV reactive power compensation device, in order to limit the harmonic input capacitor current and suppression of power system, the 35kV capacitor circuit must be installed in the damping reactor, 3 harmonic suppression, with rated voltage 35kV, rated electric inductance 26.2mH, rated current 350A dry hollow single-phase outdoor type damping reactor, and 2.52Mvar capacitor to the 3 harmonic resonance circuit is formed, the 3 harmonic filter circuit.
在电容器回路安装阻尼电抗器(即串联电抗器),皇冠手机登陆网址,电容器回路投入时起抑制涌流的作用。同时与电容器组一起组成谐波回路,起各次谐波的滤波作用。如在500kV变电所35kV无功补偿装置的电容器回路中,为了限制投入电容器时的涌流和抑制电力系统的高次谐波,在35kV电容器回路中必须安装阻尼电抗器,抑制3次谐波时,采用额定电压35kV,额定电感量26.2mH,额定电流350A干式空心单相户外型阻尼电抗器,它与2.52Mvar电容器对3次谐波形成谐振回路,即3次谐波滤波回路。 
Similarly, in order to suppress the harmonics and more than 5 times, with rated voltage 35kV, rated inductance 9.2mH, rated current 382A single-phase outdoor type damping reactor, and 2.52Mvar capacitor on and above the 5 harmonic resonance loop formation. It is necessary to explain that the use and technical conditions of damping reactor are stipulated in the national standard "reactor" GB10229 - 88 and IEC289 - 88 international standards. But at present some domestic departments called the damping reactor series reactor, strictly speaking is not appropriate, because the above standards are not series reactor name.
同样,皇冠手机登陆网址为了抑制5次及以上高次谐波,采用了额定电压35kV,额定电感量9.2mH,额定电流382A单相户外型阻尼电抗器,它与2.52Mvar电容器对5次及以上高次谐波形成谐振回路。起到了抑制高次谐波的作用,需要说明的是,在国家标准《电抗器》GB10229—88和IEC289—88国际标准中均对阻尼电抗器的使用和技术条件作了规定。但目前国内有些部门将阻尼电抗器称为串联电抗器,严格来讲是不合适的,因为上述标准中均没有串联电抗器这个名称。
 
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