Evaluation of multiple inverter volt-VAR control interactions with realistic grid impedances
Authors:
- 1 July 2015
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 1-5
Abstract
Integration of large numbers of distributed photovoltaic (PV) systems in electric distribution circuits often requires advanced functions (e.g. volt-VAR, frequency-Watt etc.). However, significant concerns have been raised about potential for PV inverters with such controls to interact with one another in a way that could cause grid instability. The lack of standardized inverter models makes it hard to simulate such transient interactions in software. Similarly it is very hard to test these dynamic inverter interactions in the laboratory. In this paper, unique Power Hardware-in-the-Loop (PHIL) techniques are presented to experimentally test for interactions of multiple PV inverters connected to multiple points-of-common-coupling (PCCs) with grid impedances between them. Sample test results are provided from simulation-only scenarios and PHIL testing. Though simulation results indicated possible harmful interactions between inverters' volt-VAR controllers; no such interactions were found in the limited hardware testing.Keywords
This publication has 14 references indexed in Scilit:
- A power hardware-in-the-loop framework for advanced grid-interactive inverter testing2015
- Testing advanced photovoltaic inverters conforming to IEEE standard 1547 - Amendment 12014
- Suppression of Low- and High-Frequency Instabilities and Grid-Induced Disturbances in Distributed Generation InvertersIEEE Transactions on Power Electronics, 2011
- Stabilization of Power Hardware-in-the-Loop simulations of electric energy systemsSimulation Modelling Practice and Theory, 2011
- Impacts of varying penetration of distributed resources with & without volt/var control: Case study of varying load types2011
- The IEEE 8500-node test feeder2010
- Renewable Energy Systems Instability Involving Grid-Parallel Inverters2009
- Improve the Stability and the Accuracy of Power Hardware-in-the-Loop Simulation by Selecting Appropriate Interface AlgorithmsIEEE Transactions on Industry Applications, 2008
- Review of potential problems and utility concerns arising from high penetration levels of photovoltaics in distribution systems2008 33rd IEEE Photovolatic Specialists Conference, 2008
- Stability of photovoltaic and wind turbine grid-connected inverters for a large set of grid impedance valuesIEEE Transactions on Power Electronics, 2006