电力系统自动化2024，Vol.48Issue(2)：29-36,8.DOI:10.7500/AEPS20230706004
海上风电低频输电系统快速母线保护
Fast Busbar Protection for Low-frequency Transmission System of Offshore Wind Power
摘要
Abstract
After a busbar fault in the low-frequency transmission system of offshore wind power takes place,the equivalent potential and impedance of the converter-type power source are no longer considered constant like traditional power grids due to the switching and adjustment process of control.The paper theoretically analyzes the adaptability of busbar current differential protection and clarifies the impact modes of fault control strategies on the sensitivity of differential protection.A busbar protection is proposed based on time-domain full component model identification,utilizing the different equivalent fault models corresponding to internal and external busbar faults.This protection principle reflects the changes in the topology of the protected components themselves,and theoretically has the advantage of not being affected by power source characteristics.It is also applicable to other converter-type power grids.At the same time,the proposed protection is implemented in the time domain without the problem of phasor extraction,and the operation speed is fast.Finally,a simulation model is built in PSCAD/EMTDC to verify the reliability and speed of the proposed busbar protection.关键词
海上风电/低频输电系统/母线保护/适应性/模型识别/时域全量Key words
offshore wind power/low-frequency transmission system/busbar protection/adaptability/model recognition/full component in time domain引用本文复制引用
宋国兵,高校平,张晨浩,窦竟铭,王秀丽,宁联辉..海上风电低频输电系统快速母线保护[J].电力系统自动化,2024,48(2):29-36,8.基金项目
博士后创新人才支持计划资助项目(BX20230287) （BX20230287）
国家电网公司科技项目(5108-202218280A-2-66-XG). This work is supported by the Postdoctoral Innovation Talents Support Program(No.BX20230287)and State Grid Corporation of China(No.5108-202218280A-2-66-XG). （5108-202218280A-2-66-XG）
