Calculation and Analysis of the Fundamental Frequency Electromagnetic Induction of Hybrid Laying AC and DC Cables

ZHAO Peng; CHEN Zhengzheng; HU Kai; YANG Dan; ZHENG Xinlong; LE Jian

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Calculation and Analysis of the Fundamental Frequency Electromagnetic Induction of Hybrid Laying AC and DC Cables

更新时间：2025-12-08

- Calculation and Analysis of the Fundamental Frequency Electromagnetic Induction of Hybrid Laying AC and DC Cables
- Vol. 46, Issue 2, Pages: 576-585(2020)
- 作者机构：
  
  1. 中国电力科学研究院有限公司
  2. 国网舟山供电公司
  3. 武汉大学电气与自动化学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：29 February 2020，
  
  Published：2020
- 稿件说明：
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ZHAO Peng, CHEN Zhengzheng, HU Kai, et al. Calculation and Analysis of the Fundamental Frequency Electromagnetic Induction of Hybrid Laying AC and DC Cables[J]. 2020, 46(2): 576-585.
DOI：

ZHAO Peng, CHEN Zhengzheng, HU Kai, et al. Calculation and Analysis of the Fundamental Frequency Electromagnetic Induction of Hybrid Laying AC and DC Cables[J]. 2020, 46(2): 576-585. DOI：

摘要

为制定针对性的感应电压/电流抑制措施

开展了交直流电缆混合敷设情况下直流电缆基频感应电压和电流的理论计算和特性分析。基于模块化多电平换流器（modular-multilevel-converter

MMC）结构和工作原理

得出了换流器基频阻抗计算方法。结合交直流电缆混敷时基频感应电压的计算

给出了基频感应电流的理论计算式。分析了各种电缆敷设方式下电缆间耦合距离、直流电缆金属护套接地方式以及直流电缆交叉换位等对电磁感应特性的影响规律

采用对称分量法计算了交流系统多种暂态过程中的基频感应电压。建立了MMC交直流电缆混合敷设的PSCAD/EMTDC仿真模型

稳态和暂态下基频感应特性误差分别不超过7%和9.6%

验证了所提出基频感应特性理论计算的有效性和电磁感应特性影响分析的正确性。仿真结果还表明

减小金属护套接地电阻和提高护套材料磁导率可有效增强其对电磁感应的屏蔽效果

直流电缆交叉换位敷设时可降低交流电缆的电磁感应。

Abstract

In order to develop specific induced voltage/current suppression measures

we performed the theoretical calculation and characteristic analysis of the fundamental frequency induced voltage and current of DC cable in case of hybrid laying of a modular-multilevel-converter（MMC） with AC and DC cables. Based on the structure and working principle of MMC converter

the calculation method of the fundamental frequency impedance of the converter is obtained. Combined with the calculation of the fundamental frequency induced voltage when AC and DC cables are hybrid laying

the theoretical calculation formula of the fundamental frequency induced current is given. The influence of the coupling distance between cables

the grounding method of DC sheath metal sheath and the crossover of DC cable on electromagnetic induction characteristics is analyzed. The fundamental frequency induced voltage in various transient processes of the AC system is calculated by using a symmetrical component method. Based on PSCAD/EMTDC

the simulation model of MMC AC/DC cable hybrid laying is established

the errors of the fundamental frequency sensing characteristic under steady state and transient state are less than 7% and 9.6%

verifying the validity of the theoretical calculation and the correctness of the influence of electromagnetic induction characteristics. The simulation results also show that reducing the grounding resistance of the metal sheath and improving the magnetic permeability of the sheath material can effectively enhance its shielding effect on the electromagnetic induction

and electromagnetic induction of the AC cable can be reduced with DC cable cross-displacing.

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