HILS test facilities for PV-PCS and PCS for storage battery at AIST

In order to make effective use of PV-PCSs and battery storage PCSs, it is important to develop and evaluate behaviors in power system, grid interconnection, their control and protection equipment, etc. A HILS (Hardware in the Loop Simulation) test facility was developed for these purposes which was consisted in combination with real-time simulator and actual hardware of their PCSs. RTDS of RTDS Technologies Inc. for real-time simulator, MX 30 of AMETEK Inc. as a signal amplifier of RTDS analysis results and the SMA 20 kW PCS for actual hardware were used for the HILS test facility. In the simulation, power system included PV-PCS is simulated by the RSCAD which is an exclusive software of RTDS. A dynamic PQ source model provided in the RSCAD library was used instead of the actual PCS model. AC voltages Vac and AC currents Iac are detected from the actual PCS and feedback to the RTDS. In the simulation program, we calculate instantanious real power P and reactive power Q in real time using Vac and Iac in order to set as a command of the dynamic PQ source model. For the HILS test, we analyzed behaviors of the PV-PCS during grid faults. And the results were compared with off-line simulation using a PV model provided in the RSCAD library.