Interaction characteristics between multi-port hybrid DC circuit breaker and MVDC distribution system under diversified working conditions
Interaction characteristics between multi-port hybrid DC circuit breaker and MVDC distribution system under diversified working conditions
复制标题
多样化工况下多端口混合直流断路器与MVDC配电系统交互特性
DOI：
10.1049/iet-rpg.2019.1031
复制
发表时间：
2020
影响因子：
2.6
通讯作者：
Popov Marjan
中科院分区：
文献类型：
--
作者：
Wen Weijie;Li Pengyu;Cao Hong;Liu Haijin;Wang Xingguo;Lv Hui;Li Bin;Popov Marjan
随着可再生能源和电力电子负荷的逐步普及和应用，中压直流配电系统得到了广泛的关注。直流断路器对电力系统的可靠性和灵活性至关重要。作者提出的带负电压源（NVS）的多端口混合DCCB具有低成本和微操作损耗的特点，可能是一个更好的选择。为进一步推动直流断路器在MVDC系统中的工业应用，研究了直流断路器与电力系统的相互作用特性。简要介绍了多端口混合DCCB的结构。然后，考虑了单故障、多故障和任意方向开关负载电流等多种工作情况，分别给出了各工作情况下多端口DCCB中各元件的配合顺序。然后，基于PSCAD/EMTDC仿真模型，分析了多端口DCCB内部的暂态电流/电压分布规律及其机理，仿真结果验证了多端口混合DCCB与NVS在MVDC系统中的优越性和有效性。
Due to the progressive penetration and usage of renewable sources and loads based on power electronics, medium voltage direct current (MVDC) distribution system is getting broad attention. Direct current circuit breakers (DCCBs) are of vital importance for the reliability and flexibility of power system. With features of low cost and micro‐operating losses, multi‐port hybrid DCCB with negative voltage source (NVS) has been proposed by the authors and might be a better choice. To further promote its industry application in MVDC system, interaction characteristics between DCCB and power system are investigated in this study. The structure of multi‐port hybrid DCCB is briefly introduced. Then, considering the diversified working conditions, e.g. single fault, multiple faults and switching load current with random direction, the cooperation sequence of components in multi‐port DCCB under all these working conditions is proposed, respectively. Then, based on simulation model established in PSCAD/EMTDC, transient current/voltage distribution pattern inside multi‐port DCCB and its mechanism are discussed, and simulation results have verified the superiority and effectiveness of multi‐port hybrid DCCB with NVS in MVDC system.