摘要
目前治理配网台区三相不平衡主要采取的技术是在相间跨接电感、电容或者负载三相倒闸装置,但自身特性技术因素导致体积过于庞大、补偿精度不够、响应负载变化滞后,随着电力电子技术的发展,基于电力电子技术的补偿装置能达到快速精确补偿三相不平衡的效果,但其造价高昂,全面代替原有LC补偿造成一定的资源浪费。本文提出一种SVG+LC的混合补偿器,既可利用小容量SVG的快速精确动态补偿,又可利用原有LC应对三相不平衡补偿中的粗补偿需求,并对其总体协调与子系统的控制策略进行研究,以应对电网电压的闪变与跌落,同时防止传统LC粗补带来的过补偿隐患,通过仿真验证了方案在三相不平衡补偿上的适用性。
The technology adopted for the present control of three-phase unbalance in distribution network is to bridge inductance,capacitance among phases or load three-phase reverse device,but the size is too big,the compensation accuracy is insufficient and the response load variation is lag due to the characteristic technology itself. With the development of electric power and electronic technology,the electric and electronic-based compensation device can achieve the result of quickly and accurately compensating three-phase unbalance. However,comprehensive replacing the original LC compensation will cause definite resource waste due to its expensive construction cost. In this paper,a kind of hybrid compensator is proposed,which can use fast and accurate dynamic compensation of small power SVG,but also can use original LC to deal with the coarse compensation requirement of three-phase unbalance,and the control strategy of the overall coordination and subsystems is studied to deal with the flick and sag of grid voltage and,at the same time,it can prevent the over compensation danger by the traditional LC coarse compensation. The applicability of the solution in the three-phase unbalance compensation is verified by the simulation.
出处
《电力电容器与无功补偿》
北大核心
2018年第1期44-48,共5页
Power Capacitor & Reactive Power Compensation
基金
中国南方电网科技项目(GDKJQQ20152075)
关键词
配网
三相不平衡
SVG+LC
distribution network
three-phase unbalance
SVG+LC
