Design of demonstration platform for PV DC-DC converter in dc distribution network

Due to less transformation links, stronger transmission capacity and less line loss, DC transmission is an important way for large-scale photovoltaic (PV) sources accommodation in distributed network. Meanwhile there are a high ratio of power electronic devices with bulk capacitor, which is prone to loses stability due to the rapid rise of current and the fast protection of equipment when the fault occurs. The power quality, power control capability and transient response of PV DC-DC Converter are not clear. Therefore, in order to truly reflect the long-term performance of DC converters, it is urgent to establish an DC network demonstration platform. In this paper, the structure for multi-scenario DC distribution network, DC circuit breaker and various power grid faults and working conditions are introduced. Meanwhile, the design of a multi-point synchronize measure and data acquisition system is given, which can record the dynamic processes of network under complex parallel operation of PV DC-DC converters.