Abstract
The article considers trends relating to the development of multisubstation DC (MSDC) networks in the form of cable and overhead power lines along with current and/or voltage converters, with DC circuit breakers serving as their key components. The requirements, circuit solutions, and main characteristics of capacitor-type DC circuit breakers were analyzed, and it has been shown from the performed analysis that it is possible to make them for medium-voltage devices. The DC circuit breaker test circuit arrangements need standardization and differ from each other for different manufacturers, a circumstance that adds difficulty to comparison of different makeup versions of these circuit breakers for selecting the optimal technical solutions. For application in medium-voltage cable MSDC networks, it is recommended to use cheap and well-matured domestically produced capacitor-type DC circuit breakers equipped with vacuum arc quenching chambers and an induction-dynamic drive, which satisfy the requirements of using them in MSDC networks.
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