Verification on Valve Losses of LCC HVDC Converter Station in Korea

This paper deals with verification of valve losses on High Voltage Direct Current(HVDC) converter stations in Korea. Technique of calculating losses is one of important verification process to evaluate systems performance, so customers have right to get accurate information of losses in project bidding process. However, it is not easy for utility company to verify maker's documents because getting information is limited from makers.Losses of a converter station can be easily estimated from calculation of two main equipments, valve and transformer, because proportion of two equipments accounts for more than 80% of the total values in the HVDC converter station. In this paper, the authors firstly analyzed calculating process of valve losses and verified if the calculated results are accorded with the reports provided from maker in accordance with the IEC standards, IEEE standard, EPRI Handbook in Jeju No.2 converter station in Korea. After that, it was verified whether the results were satisfactory compared to KEPCO's specification.