Adaptive Volt-Var Control Algorithm to Grid Strength and PV Inverter Characteristics
The high-penetration of Distributed Energy Resources (DER) in low voltage distribution grids, mainly photovoltaics (PV), might lead to overvoltage in the point of common coupling, thus, limiting the entrance of renewable sources to fulfill the requirements from the network operator. Volt-var is a co...
| Autores: | , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/345810 |
| Acceso en línea: | https://hdl.handle.net/2117/345810 https://dx.doi.org/10.3390/su13084459 |
| Access Level: | acceso abierto |
| Palabra clave: | Photovoltaic power generation Algorithms Electric power Microgrids (Xarxes elèctriques intel·ligents) Distributed power generation Low-voltage Test facilities Standards Voltage regulation Reactive power Microgrids Photovoltaic systems Optimization methods Energia solar fotovoltaica Algorismes Energia elèctrica Microxarxes (Xarxes elèctriques intel·ligents) Àrees temàtiques de la UPC::Energies |
| Sumario: | The high-penetration of Distributed Energy Resources (DER) in low voltage distribution grids, mainly photovoltaics (PV), might lead to overvoltage in the point of common coupling, thus, limiting the entrance of renewable sources to fulfill the requirements from the network operator. Volt-var is a common control function for DER power converters that is used to enhance the stability and reliability of the voltage in the distribution system. In this study, a centralized algorithm provides local volt-var control parameters to each PV inverter, which are based on the electrical grid characteristics. Because accurate information of grid characteristics is typically not available, the parametrization of the electrical grid is done using a local power meter data and a voltage sensitivity matrix. The algorithm has different optimization modes that take into account the minimization of voltage deviation and line current. To validate the effectiveness of the algorithm and its deployment in a real infrastructure, the solution has been tested in an experimental setup with PV emulators under laboratory conditions. The volt-var control algorithm successfully adapted its parameters based on grid topology and PV inverter characteristics, achieving a voltage reduction of up to 25% of the allowed voltage deviation. |
|---|