A unified control structure for grid connected and islanded mode of operation of voltage source converter based distributed generation units under unbalanced and non-linear conditions
| Autor: | Noel Richard Merritt, Prabodh Bajpai, Bikash C. Pal, Chandan Chakraborty |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Technology
Computer science 020209 energy Energy Engineering and Power Technology 02 engineering and technology Bidirectional control Distributed power generation Engineering DESIGN Control theory Voltage Source Converter (VSC) Limit (music) 0202 electrical engineering electronic engineering information engineering Generalized Integrator (GI) Voltage source Electrical and Electronic Engineering BATTERY Science & Technology Energy business.industry Micro-Grid (MG) Fault currents Engineering Electrical & Electronic CONTROL STRATEGY Converters Bi-directional dc-dc converter 0906 Electrical and Electronic Engineering Control system Distributed generation Integrator Voltage control DC-DC power converters Couplings Node (circuits) Current control business Voltage |
| Popis: | This manuscript develops a unified control structure for Distributed Generation (DG) units based on Voltage Source Converters considering unbalanced and non-linear operating conditions. This control structure works for both the Islanded and the Grid-connected modes of operation of the Micro-Grid (MG). The objective of this control scheme is to regulate the line currents of the DG unit in such a manner that the voltage at the Point of Common Coupling (PCC) remains balanced despite the line currents of the DG unit being unbalanced and distorted. Multiple adaptive P-R controllers have been proposed for the current control loop of the Voltage Source Converter (VSC). These controllers have been implemented with resettable integrators so as to limit the DC components in the post fault current of the VSC. The Battery Energy Storage System (BESS) is interfaced to the DC link of the VSC through bi-directional dc-dc converters. An improved control structure for the bi-directional dc-dc converter has been developed. The effectiveness of these control structures have been presented and tested in PSCAD/EMTDC in an IEEE 34 node distribution system model being fed by two identical DG units. |
| Databáze: | OpenAIRE |
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