Integration of Distributed Generation in the Volt/VAR Management System for Active Distribution Networks
Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
This thesis is set within the research scope of an active distribution grid. Control of the DG output to ensure voltage stability and reactive power support is investigated. The solution presented in this thesis proposes integration of DG management systems into decentralized parts of the Volt/VAR management system. The solution is designed to address issues connected to increased DG penetration, while at the same time avoiding the technical challenges related to state-of-the-art model-based Volt/VAR management.
The solution proposes coordinated control of DGs with conventional voltage regulation equipment, based on pre-defined hierarchies. However, to reduce requirements for control and communication technology, the distribution grid is divided into zones. Each zone has its individual Volt/VAR control scheme, where the pre-defined rules depend on the available voltage regulation devices. To add yet another level of flexibility, these zones can be combined into larger zones with a common voltage regulation scheme. This is referred to as "adaptive zoning".
Extensive time domain simulations are carried out to verify the control efficacy of the proposed method. The simulated cases show that control schemes successfully maintain voltage within limits at disturbed grid conditions. It is seen that coordination of DGs with voltage regulation equipment is an efficient strategy to mitigate the negative impacts of increased DG penetration. Adaptive zoning effectively reduces the requirements for control and communication equipment, while still ensuring a grid-wide solution.
Place, publisher, year, edition, pages
2013. , 103 p.
UPTEC ES, ISSN 1650-8300 ; 13 029
Active distribution network, Volt/VAR management system, Distributed generation, Voltage source converter, Reactive power support
Engineering and Technology
IdentifiersURN: urn:nbn:se:uu:diva-206117OAI: oai:DiVA.org:uu-206117DiVA: diva2:644386
ABB Corporate Research
Master Programme in Energy Systems Engineering
Majumder, Ritwik, Dr.
Pernestål, KjellWidén, Joakim