Energy Savings Estimation Considering Volt/VAr Optimization and Distributed Generation

Abstract

The practical loads connected in a distribution network are voltage-dependent. Therefore, any variation in the system voltage directly affect the real and reactive powers of the connected loads. In volt/VAr optimization (VVO), On Load Tap Changer (OLTC), and Voltage Regulators (VRs) are used for voltage optimization, whereas Capacitor Banks (CBs) injects kVAr into the system provided operational and system constraints satisfied. Henceforth, both active and reactive powers of a load will be less or more followed by the terminal voltage. Apart from the loads, the real and reactive power losses also affect with injected kVAr and system voltage. Therefore, minimizing apparent energy (MVAh) of the network will result in the minimization of other components such as real power, reactive power, system losses, etc. This paper focus on the minimization of substation apparent energy using VVO provided photovoltaic (PV) and wind turbine (WT) generators are actively participating. All simulations are performed on the 33-bus distribution system, where different types of load are connected.