期刊
JOURNAL OF ENGINEERING-JOE
卷 -, 期 15, 页码 1072-1077出版社
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/joe.2018.0266
关键词
HVDC power transmission; power overhead lines; power transmission faults; inductors; power transmission protection; fault currents; current limiters; wavelet transforms; fault diagnosis; circuit breakers; power grids; DC-line terminating inductors; protective functions; MTDC grids; detailed DC-side fault analysis; inductive termination; high-voltage multiterminal direct current grid; design guidelines; DC-side inductors; current interruption devices; DC circuit breakers; current limiting inductors; fault signatures; fault current level
资金
- Royal Society of Edinburgh (J M Lessells Travel Scholarship)
- General Electric Grid Solutions
- National Natural Science Foundation of China [51120175001]
- National Key Research and Development Plan of China [2016YFB0900600]
This study presents a detailed DC-side fault analysis considering inductive termination of lines within a high-voltage multi-terminal direct current (MTDC) grid. The analysis aims to provide design guidelines for DC-side inductors, taking into account important aspects of protection such as the required speed of operation of relays and the performance characteristics of current interruption devices (i.e. of DC circuit breakers). Moreover, the impact of current limiting inductors on the fault signatures is investigated. In particular, it has been found that DC-side inductors not only limit the fault current level, but also the resulting signatures in voltage and current, can assist to enhance the speed of operation, stability and selectivity of protective functions for DC-side faults. The analysis has been extended to include the impact of inductive termination on fast transient phenomena known as travelling waves. Specifically, DC-side inductors can form a significant reflection boundary for the generated travelling waves. A deeper insight into the faults has been achieved by utilising wavelet transform.
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