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This study investigates a multi-status simulation method based on event-driven for a smart distribution network (SDN). By switching a steady simulation model and a dynamic simulation model, the typical events of the SDN with various time constants can be simulated within the same simulation framework. The aim of the proposed method is to make full utilisation of the advantages of conventional simulation methods when considering the actual operation process of the SDN with many typical events so that the simulation results can approach the actual situation. To ensure that the operating status and corresponding simulation models of the SDN could be switched correctly and automatically, a simulation engine is proposed and implemented based on a finite state machine. Multi-status simulation experiments on IEEE 33-bus and an actual 10-kV distribution network validate the proposed multi-status simulation method. [ABSTRACT FROM AUTHOR]

This study explains the underlying concepts and implementation details of using an open source distribution analysis tool – OpenDSS to conduct dynamic simulations of converter interfaced generation (CIG) in large, realistic power distribution systems. The dynamic models of different types of CIGs are derived and written into the dynamic‐link library (DLL) to be called by OpenDSS during simulation. The DLL development is illustrated in detail with the programme structure and the model derivation of CIG. A phasor domain modelling method is adopted to derive single‐phase CIG models in order to make the DLL models compatible with OpenDSS. The conversion between phasor and natural waveform data when simulating single‐phase systems is discussed. The DLLs are derived based on the equations of the power stage circuit including the filters and the specific controllers. Applications of developed DLLs are illustrated with test cases, where volt‐VAR control and microgrid mode control of CIGs are tested in a large‐scale distribution system. This study can be used as a tutorial for performing the dynamic analysis for single‐phase converters in OpenDSS. [ABSTRACT FROM AUTHOR]

This study presents the modelling and dynamic simulation of a high penetration wind diesel power system (WDPS) consisting of a diesel generator (DG), a wind turbine generator (WTG), consumer load, dump load and a battery energy storage system (BESS). First the WDPS architecture and the models of the WDPS components are described. The WDPS is simulated in wind-only (WO) mode where the DG is not running and the WTG supply active power and in wind-diesel (WD) mode where both DG and WTG supply power. The simulation results are given showing graphs of the main electric variables in the WDPS (system frequency and voltage and active power in each component) and main battery variables (current, voltage and state of charge). The results in the WO mode show how the BESS, under the command of a proportional-integral-derivative (PID) controller, supplies/stores active power to regulate the isolated system frequency. The WD control enables the BESS to smooth the load and wind power variations, so that the isolated system power quality is improved. Also it is shown in the WD mode a peak shaving application where the control orders the BESS to supply active power temporarily to support system frequency in a DG overload situation. [ABSTRACT FROM AUTHOR]