A novel reclosing and rebreaking DC solid state circuit breaker

Abstract

There is no zero crossing of the current in DC power circuits. Thus unless you cut off the short-circuit current quickly, the electrical fire caused by electric arc or spark can occur. And after the initial fault breaking operation the long-duration sustained interruption without fault recovery may cause a lot of serious economic losses. Therefore this paper proposes a new DC SSCB that has quick reclosing and rebreaking capabilities, and thus can perform the operating duties of reclosing and rebreaking required by the industrial standards and regulations. The proposed DC SSCB can perform rapid breaking, thus the material costs of power facilities can be reduced as the rapid breaking of DC SSCB enables selecting lower specification devices and minimizing auxiliary SCR. Also it can perform the operating duty of reclosing and rebreaking even in the state that short circuit lasts on load side. The operating characteristics of the proposed SSCB are verified by simulations and experiments on short circuit fault.Index Terms-DC circuit breaker, DC SSCB, solid state circuit breaker, operating duty.

Solid-State Bus-Tie Switch for Shipboard Power Distribution Networks

“…different principles. Various proposals can be traced back in literature, relying on different operating principles [12], [13]: i) Interrupting, in which the DC bus current is interrupted upon opening of the device [14]- [17]; ii) Limiting, that allows current freewheeling gradually dissipating inductive energy [11], [18]; iii) Resistive, where current is redirected into a capacitor and energy is discharged in an ad hoc resistor [19]; iv) Resonant, in which the interruption is achieved through a capacitive discharge creating an artificial current zero [20]- [22].…”

An auto‐reclosing scheme for DC circuit breaker in VSC‐HVDC transmission system

“…Furthermore, overhead lines are always subjected to temporary faults, that is, faults which disappear after the arc has been extinguished, thus allowing for the line to be restarted [7]. From literature [8, 9], the auto‐reclosing strategy of DCCB is studied, new topologies for rapid reclosing are developed, but the reclosing coordination with converter is hardly discussed.…”