Distributed Reactive Power Control based Conservation Voltage Reduction in Active Distribution Systems

• Main Authors: EMIROGLU, S., UYAROGLU, Y., OZDEMIR, G.
• Format: Article
• Language: English
• Published: Stefan cel Mare University of Suceava 2017-11-01
• Series: Advances in Electrical and Computer Engineering
• Subjects: energy conservation; reactive power control; renewable energy sources; smart grids; voltage control
• Online Access: http://dx.doi.org/10.4316/AECE.2017.04012

This paper proposes a distributed reactive power control based approach to deploy Volt/VAr optimization (VVO) / Conservation Voltage Reduction (CVR) algorithm in a distribution network with distributed generations (DG) units and distribution static synchronous compensators (D-STATCOM). A three-phase VVO/CVR problem is formulated and the reactive power references of D-STATCOMs and DGs are determined in a distributed way by decomposing the VVO/CVR problem into voltage and reactive power control. The main purpose is to determine the coordination between voltage regulator (VR) and reactive power sources (Capacitors, D-STATCOMs and DGs) based on VVO/CVR. The study shows that the reactive power injection capability of DG units may play an important role in VVO/CVR. In addition, it is shown that the coordination of VR and reactive power sources does not only save more energy and power but also reduces the power losses. Moreover, the proposed VVO/CVR algorithm reduces the computational burden and finds fast solutions. To illustrate the effectiveness of the proposed method, the VVO/CVR is performed on the IEEE 13-node test system feeder considering unbalanced loading and line configurations. The tests are performed taking the practical voltage-dependent load modeling and different customer types into consideration to improve accuracy.