Supplementary control based on current source coupling for improving dynamic characteristics of active distribution network

Supplementary control (SC) technology is widely leveraged by power supply companies in active distribution networks (ADNs) to improve their stability and dynamic characteristics. Yet, the existed SCs are generally implemented from inside converter controllers of distributed generators (DGs) or loads, so there a need redesign internal physical structure existing controller, resulting increasing work amount assembling workability. This paper studies specific R & D process novel external coupling type SC (ECSC), which based upon current source injection (CSI-ECSC) for improving characteristics ADN. The signals coupled sampling loop outside controller. And employment sample makes it unnecessary As result, simplified its workability improved. In this paper, detailed exemplary ADN with direct-drive permanent magnet synchronous generator (PMSG) firstly set up math full eigenvalue analysis. Then, CSI-ECSC designed loop, interface circuit, parameter setting. Furthermore, using PSCAD/EMTDC, groups case conducted ADNs where photovoltaics (PVs) energy storage (ES) included. Finally, real-time hardware-in-the-loop (HIL) testing validates functionality realized RTDS.