Electrical power systems

Abstract

An electrical power systemand a methodof controlling an electrical power systemare provided. The electrical power systemcomprises a DC:DC power converterconnected between a DC power sourceand a DC electrical network. The DC electrical networkcomprises at least a first zone Zfor powering a first group of one or more electrical loadsL, a second zone Zfor powering a second group of one or more electrical loadsL, a first controllable circuit breaker X, and a second controllable circuit breaker X. The electrical power systemfurther comprises a control systemconfigured to: in response to determining there is a fault in the DC electrical network: control a switching operation of a plurality of transistors of the DC:DC power converterto supply a controlled and gradually increasing amount of current from the DC power sourceto the DC electrical network; open the first controllable circuit breaker Xif the gradually increasing amount of current supplied to the DC electrical networkreaches a level defined by a first trip profile, the first trip profiledefining a gradually decreasing current level; and open the second controllable circuit Xbreaker if the gradually increasing amount of current supplied to the DC electrical networkreaches a level defined by a second trip profile, the second trip profiledefining a gradually decreasing current level, the gradually decreasing current level defined by the first trip profilebeing higher than the gradually decreasing current level defined by the second trip profile