多馈入交直流混联受端电网直流接入能力研究评述

摘要

DC access capability for multi-infeed HVDC power transmission system is an important issue which gets power companies concerned greatly. From the problems caused by large scale multi-infeed HVDC, the main limiting factors of DC access capability are analyzed and the current researches on DC and new energy access capability are summarized. Based on these the calculation method and the next research directions of DC access capability are discussed. DC access capability is a multi objective optimization problem, and the next key study is to build the system optimal model to evaluate the DC access capability of multi-infeed HVDC power transmission system. For the main limiting factors the suggestions to improve DC access capability and optimize the layout of multi-infeed HVDC are proposed.%受端电网的直流接入能力是大规模交直流混联电网调度运行部门越来越关注的问题。从直流多馈入交直流混联电网后面临的主要问题出发，分析了影响受端电网直流接入能力的主要因素，对现有直流及新能源接入能力研究方法进行总结。分析了各方法的优缺点，探讨了受端电网直流接入能力的计算方法及未来的研究方向。受端电网直流接入能力是一个多目标优化问题，下一步研究重点是建立系统的优化模型，科学化、实用化地评估受端电网直流接入能力。针对限制受端电网直流接入能力的主要因素，提出了提高电网直流接入能力的相关建议。