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.
ASJC Scopus subject areas
- Control and Systems Engineering
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering