电力建设2024，Vol.45Issue(12)：187-194,8.DOI:10.12204/j.issn.1000-7229.2024.12.015
应用于新能源孤岛经柔直送出系统的交流耗能优化投切策略
Improved Switching Strategies of AC Energy Consumption Devices for VSC-HVDC System with Renewable Energy Integration in Island Mode
摘要
Abstract
This paper focus on the application scenario of using thyristor-controlled AC energy consumption devices to quickly and dynamically balance surplus power in VSC-HVDC system with renewable energy integration in island mode.Three optimization objectives for surplus power control were proposed,combining the two key dynamic performances of the DC voltage and active power in the converter.Improved chop-switching strategies,including a switching-on strategy based on prediction as well as dynamic voltage regulation,and an optimized fast low-disturbance switching-off strategy based on chopping,are designed.The proposed improved switching strategy was verified in a four-terminal VSC-HVDC power grid simulation system of the Zhangbei project as well as in an on-site test.The results show that,compared to the fixed-number switching strategy,the improved switching strategy of AC energy-consuming devices can reduce the power loss during the fault period,quickly switch off the energy-consuming device after fault recovery for fast power recovery,dynamically regulate the DC voltage with high efficiency during power-surplus periods,and significantly improve the system performance of the switching process.In addition,the selection of setting values for the improved AC energy consumption switching strategies has a wide stable range.关键词
柔性直流/孤岛/交流耗能装置/斩波投切Key words
VSC-HVDC/island mode/AC energy consumption devices/chop switching分类
信息技术与安全科学引用本文复制引用
汪楠楠,卢宇,唐浩,王柯..应用于新能源孤岛经柔直送出系统的交流耗能优化投切策略[J].电力建设,2024,45(12):187-194,8.基金项目
This work is supported by State Grid Corporation of China Research Program(No.5200-202456113A-1-1-ZN). 国家电网有限公司科技项目(5200-202456113A-1-1-ZN) （No.5200-202456113A-1-1-ZN）
