This paper proposes a novel decentralized coordinated voltage control (CVC) scheme for a distribution system consisting of dc microgrid (DCMG), doubly fed induction generator-based wind system, on-load tap changer (OLTC), and DSTATCOM. The proposed scheme considers the response time of various voltage regulating devices and assigns a master/slave role based on the operating conditions of the grid and availability of the device. This paper offers a distinctive solution to optimally utilize the voltage regulating devices which do not take part in the contingency situation such as OLTC and DCMG converter in order to achieve the following objectives: 1) A better voltage regulation and increased reactive power reserve during normal operating conditions of the grid. 2) To improve the transient performance of the system in terms of reduction in postfault voltage recovery time. Two modified IEEE 33 bus systems are implemented in a real-time digital simulator platform to test the effectiveness of the proposed CVC scheme. Furthermore, power hardware in loop (PHIL) experimentation is conducted with a reduced scale DCMG hardware setup to test the stability, feasibility, and practicability of the proposed scheme. The simulation and PHIL results demonstrate that the proposed CVC scheme provides a better solution compared to existing work by fulfilling the set objectives.

中文翻译：

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直流微电网的配电系统分散协调电压控制新方案

本文针对由直流微电网（DCMG），基于双馈感应发电机的风力系统，有载分接开关（OLTC）和DSTATCOM组成的配电系统，提出了一种新型的分散式协调电压控制（CVC）方案。提出的方案考虑了各种电压调节装置的响应时间，并根据电网的运行条件和装置的可用性分配了主/从角色。本文提供了一种独特的解决方案，以最佳地利用不参与应急情况的调压装置（例如OLTC和DCMG转换器）以实现以下目标：1）更好的调压和增加正常运行期间的无功功率储备电网条件。2）在减少故障后电压恢复时间方面提高系统的瞬态性能。在实时数字仿真器平台中实施了两个改进的IEEE 33总线系统，以测试所提出的CVC方案的有效性。此外，使用缩小规模的DCMG硬件设置进行了电源硬件在环（PHIL）实验，以测试所提出方案的稳定性，可行性和实用性。仿真和PHIL结果表明，与现有工作相比，所提出的CVC方案通过实现设定的目标提供了更好的解决方案。使用缩小规模的DCMG硬件设置进行了电源硬件在环（PHIL）实验，以测试所提出方案的稳定性，可行性和实用性。仿真和PHIL结果表明，与现有工作相比，所提出的CVC方案通过实现设定的目标提供了更好的解决方案。使用缩小规模的DCMG硬件设置进行了电源硬件在环（PHIL）实验，以测试所提出方案的稳定性，可行性和实用性。仿真和PHIL结果表明，与现有工作相比，所提出的CVC方案通过实现设定的目标提供了更好的解决方案。