Research and development of reactive power compensation and harmonic control device in distribution
Dynamic reactive power compensation of distribution network without reactive power compensation and harmonic suppression device is successfully developed, and put into mass production, can bring great social benefits, at present China's distribution network in widespread reactive power compensation is insufficient, layout unreasonable, there is a urban and rural and regional grids capacitor capacity inversion phenomenon. 10KV voltage level above the distribution grid users and work demand, reasonable and effective use of no reactive compensation and harmonic control device and the distribution network of reactive power and harmonic compensation can not only achieve the purpose of saving energy and reducing consumption, but also can reduce the damage of the electric device and the accident caused by the harmonic. Information from: after the completion of the transmission and distribution equipment network project, the company of the product were large-scale mass production, save a lot of energy for society, to promote the domestic equipment replace imported equipment to play a role in actively, bring huge social benefits. An alternative approach to traditional compensating harmonic and reactive current is equipped with passive filter, usually by the power capacitor, inductor and resistor on parallel combination and, the method can harmonic compensation, and compensation of reactive power. Currently our country commonly used reactive power conditioning equipment is mechanical shunt reactors, switched capacitor, the stationary type pressure regulating means, because the adjustment is not continuous, slow response speed, it is difficult to meet the rapid changes in system operating mode of demand. And another surge of static var compensator (SVC), response speed is very fast, but due to a constant impedance characteristics, making in the low voltage to provide the required reactive power support, so deal with emergencies ability is weak, and in order to suppress the harmonics must be installed in the filter, covers an area is larger, in addition, the SVC device easily lead to oscillation system. In contrast, the novel reactive power compensator STATCOM is a more effective means for adjusting voltage, it without reactive current output can be constant in a large range of voltage change, in the low voltage can still provide strong reactive support, and from perceptual to the content of the full range of continuous adjustment.
| Datetime：2016.03.29 From： Views：