Active Arc Suppression Device Based on Voltage Source Converter with Consideration of Line Impedance in Distribution Networks
Active Arc Suppression Device Based on Voltage Source Converter with Consideration of Line Impedance in Distribution Networks
复制标题
考虑线路阻抗的电压源换流器主动消弧装置
DOI：
10.1049/pel2.12203
复制
发表时间：
2021
影响因子：
2
通讯作者：
Josep M. Guerrero
中科院分区：
文献类型：
--
作者：
Bishuang Fan;Haihang Ma;Wen Wang;Ganzhou Yao;Qikai Li;Xiangjun Zeng;Josep M. Guerrero
在小电流接地系统中，单线接地故障下的残余电流严重威胁着人身安全和供电设备的安全。有源消弧装置已被证明在忽略线路阻抗的情况下，对SLG故障消弧是有效的。然而，在实际应用中，线路阻抗随故障位置的不同而变化，流过阻抗的负荷电流会产生附加压降，从而增大故障电流，这是常规方法所不能处理的。为了在线路阻抗存在的情况下实现准确的SLG故障消弧，首先推导了用于全接地故障电流补偿的中性点对地基准电压，然后提出了一种检测方法。故障前和故障后的线路电流用于消除负载电流对线路阻抗压降的影响。在此基础上，设计了双环电压电流控制器。研制了有源消弧装置样机。仿真和原型实验结果验证了该方法的有效性。
In the non-effectively grounding distribution system, residual current under single-line-to-ground (SLG) fault threats the safety of human being and power supply equipment. Active arc suppression device has been proved to be effective for SLG fault arc suppression when the line impedance is ignored. However, in practical, line impedance varies with the fault location and the load current flowing through the impedance brings about additional voltage drop, which increases the fault current and is not dealt with by the conventional methods. To achieve accurate SLG fault arc suppression with the existence of line impedance, the neutral-to-ground voltage reference for full ground-fault current compensation is firstly derived and a detection method is then proposed. The pre-fault and post-fault line currents are used to eliminate the influence of load current on the line impedance voltage drop. A dual-loop voltage and current controller is then designed. The prototype of active arc suppression device was developed. Results of simulation and prototype experiment validate the effectiveness of the proposed method.