中国电机工程学报2016，Vol.36Issue(22)：6067-6075,9.DOI:10.13334/j.0258-8013.pcsee.152509
基于VSC的交直流混合中压配电网功率-电压协调控制
Power-Voltage Coordinated Control in Hybrid AC/DC Medium Voltage Distribution Networks Based on VSC
摘要
Abstract
There are limited spaces for the fast increasing, highly concentrated loads in urban distribution networks. Voltage control is another challenge with integration of large number of distributed generation (DG) due to limited flexible control methods. This paper proposed to convert some AC lines to DC ones, and interconnected them with voltage source converter (VSC), so that node voltages can be adjusted through power control of VSC, based on which DG can be further accommodated. Different structures of VSC and its ability of power control were analyzed. Two operation states were divided, which are normal state and risk state, based on node voltage in distribution networks. Two optimal models were developed for each state in order to optimize active and reactive power of VSC. Losses were minimized in the normal state, while voltage deviations were minimized in the risk state. The efficiency and flexibility of the proposed method are verified in case study. The penetration of DG was increased based on power control of VSC, which optimized voltage profile. Node voltages can also be kept stable when a sudden change of DG output happens. The influences of normal state range on optimal results were analyzed.关键词
交直流混合配电网/分布式电源/直流配网/电压源换流器/功率-电压控制Key words
hybrid AC/DC distribution network/distributed generation/DC distribution/voltage source converter/power-voltage control分类
信息技术与安全科学引用本文复制引用
张璐,唐巍,梁军,李根,蔡永翔..基于VSC的交直流混合中压配电网功率-电压协调控制[J].中国电机工程学报,2016,36(22):6067-6075,9.基金项目
国家自然科学基金项目(51377162)；国家电网公司科技项目(PD71-13-031)。Project Supported by National Natural Science Foundation of China (51377162) （51377162）
Project Supported by Science and Technology Projects of State Grid Corporation of China (PD71-13-031) （PD71-13-031）
