Optimal Solar Photovoltaic Smart Inverter Capacity Planning and Voltage Control Strategy for Distribution System

  • 劉 建宣

Student thesis: Master's Thesis

Abstract

Because of global warming environmental pollution and natural disasters renewable energy is commonly used nowadays particularly a photovoltaic (PV) system However the high penetration of a PV system considerably affects the voltage of the distribution system and restricts the feed-in power of PV systems Therefore a suitable voltage control strategy is required to mitigate the overvoltage problem minimize power loss and increase the feed-in power of PV systems The thesis proposes an optimization strategy to determine the optimal capacity of the PV inverter considering the investment cost of the PV inverter and reactive power transaction For specified PV inverter capacities this thesis proposes a two-stage voltage control strategy for the distribution system in a high PV penetration system to regulate the system voltage within an acceptable range minimize power loss and minimize the active power curtailment of PV systems The proposed voltage control strategy is achieved using a transformer on-load tap changer (OLTC) and capacitor bank and through the reactive power control of a PV inverter The operation numbers of the OLTC and capacitor bank are limited to one day because of the effects on their lifetime To verify the feasibility of the proposed optimization capacity of the PV inverter and voltage control strategy the real load and PV generation data are used in this thesis and the control strategy is compared with the reference methods The simulation results show that the proposed voltage control strategy can mitigate the overvoltage problem and increase the feed-in power of the PV system more effectively The power loss and operation numbers of the OLTC and capacitor bank are also reduced considerably The proposed optimal inverter capacity strategy can further minimize the active power curtailment of PV systems effectively
Date of Award2016 Jul 28
LanguageEnglish
SupervisorHong-Tzer Yang (Supervisor)

Cite this

Optimal Solar Photovoltaic Smart Inverter Capacity Planning and Voltage Control Strategy for Distribution System
建宣, 劉. (Author). 2016 Jul 28

Student thesis: Master's Thesis