Research on Hybrid Active Power Filter and Its Control and Protection System for LCC-HVDC

Filters are key equipment in LCC-HVDC projects. It filters out characteristic harmonics generated by the converter and prevents the effect of harmonics generated by converters on the AC power grid. Currently, most DC transmission projects use passive filters. The first use of hybrid active power filters in the Fujian Guangdong DC interconnection project
º
This paper introduces the application framework, theory, control and protection system design of hybrid active power filters in LCC-HVDC projects.