| 基于动态元件离散化的柔性直流电网故障电流计算方法 |
| |
| 引用本文： | 刘晓悦,项心茹,康健,张怡.基于动态元件离散化的柔性直流电网故障电流计算方法[J].科学技术与工程,2022,22(34):15171-15179. |
| |
| 作者姓名： | 刘晓悦 项心茹 康健 张怡 |
| |
| 作者单位： | 华北理工大学电气工程学院 |
| |
| 基金项目： | 国家自然科学基金(61803154) |
| |
| 摘 要： | 故障电流计算是柔性直流电网设计与规划、故障类型判断的重要环节，开展相关问题的深入研究尤为重要。基于电路理论和数值积分原理，针对合理简化后的电路提出了一种基于动态元件离散化的故障电流数值计算方法。首先，通过电路理论分析故障放电机理，对电网进行合理的简化；然后，通过后向欧拉法对动态元件进行离散化处理，建立简化后电路的离散模型；最后，基于简化后电路的离散模型建立改进节点方程，求得各时刻的故障电流值。通过将所提方法的计算结果与在PSCAD/EMTDC中搭建的柔性直流电网仿真模型的结果进行对比分析，验证了所提方法的可行性与通用性。
|
| 关 键 词： | 故障电流计算 直流电网 后向欧拉法 离散 |
| 收稿时间： | 2022/5/26 0:00:00 |
| 修稿时间： | 2022/9/17 0:00:00 |
Fault Current Calculation Method for VSC-HVDC Grid Based on Discretization of Dynamic Components |
| |
| Liu Xiaoyue,Xiang Xinru,Kang Jian,Zhang Yi.Fault Current Calculation Method for VSC-HVDC Grid Based on Discretization of Dynamic Components[J].Science Technology and Engineering,2022,22(34):15171-15179. |
| |
| Authors: | Liu Xiaoyue Xiang Xinru Kang Jian Zhang Yi |
| |
| Affiliation: | College of Electrical Engineering, North China University of Science and Technology |
| |
| Abstract: | The calculation of fault current is an important link in the design and planning of flexible DC power network and the judgment of fault type. Based on the circuit theory and numerical integration principle, a numerical calculation method of fault current based on the discretization of dynamic components is proposed. First, the circuit theory is used to analyze the fault discharge mechanism to simplify the power network reasonably, then the dynamic components are discretized by the Backward Euler method, and the discrete model of the simplified circuit is established, based on the simplified discrete model of the circuit, an improved nodal equation is established to calculate the fault current at each time. The feasibility and generality of the proposed method are verified by comparing the results of the proposed method with the results of the simulation model of the VSC-HVDC grid built in PSCAD/EMTDC. |
| |
| Keywords: | fault current calculation DC grid Backward Euler method discrete |
|
| 点击此处可从《科学技术与工程》浏览原始摘要信息 |
|
点击此处可从《科学技术与工程》下载全文 |
