Automatic Voltage Control by SVC using Moving Average Control in Distribution System

Abstract

Recent years, installation of Photovoltaic (PV) system to power system is active by the environmental problem, feed in tariff system and decrement of initial investment cost. Now, the distribution system is already controlled by the existing voltage controller. However, voltage deviation is caused by high penetration of PV. In order to reduce the effect of PV power fluctuation, the Static Var Compensator (SVC) is planning to install in distribution system. SVC offers a high-speed voltage control. But there is a possibility SVC cannot operate effectively by the difference of a working speed between SVC and existing voltage controllers. So the installation of effectively SVC is required to operate cooperatively with existing voltage controllers. In this research, the automatic voltage control technique of the distribution system by SVC which used the moving average control is proposed. Since the setting value of SVC is updated by the moving average, compared with the conventional SVC control technique, an effective and efficient voltage control is given by the proposed the automatic voltage control technique of SVC.

A voltage control method in coordination with an SVR using distributed energy resources in customers for system voltage stabilization

“…[ 1,2 ] SVRs (Step Voltage Regulators) and other tap‐switching voltage regulators are installed in distribution systems to maintain appropriate voltage, but some problems remain unsolved; for example, sharp changes of voltage are not supported, while operation frequency increases, and service life declines, in case of power output fluctuations. [ 3 ] To solve these problems, reactive power compensators and other devices providing fast voltage control are connected to distribution systems, [ 4,5 ] but assuming further penetration of renewable energies, there are concerns about very high installation costs. In addition, there is research on voltage control using reactive power generated by PCSs (Power Conditioning Systems) installed together with renewable energies or battery storage [ 6–8 ] ; however, with such approach, one needs to build a communication network to independently control PCSs, and to ensure sufficient resources for voltage control.…”

Comprehensive Solution Method Considering Load Distribution for Determining Low‐Voltage Network Configurations

“…Residential PVs are often mainly connected in single-phase to low-voltage networks, and the problems related to the massive PV installation were identified from early on. Various methods have been developed to maintain power quality and reduce distribution loss [1][2][3][4][5][6][7][8][9][10]. For example, researchers have proposed various methods for voltage control issues by using effective devices such as storage batteries, on-load tap changing transformers, or static VAR compensators to manage voltage increases and fluctuations [1][2][3].…”

A Study on the Configuration of Low‐Voltage Distribution Networks for High Penetration of Photovoltaic Power Sources

“…Residential PV sources are mainly connected to low‐voltage networks in a single phase, and the problems related to the massive introduction of those power sources were identified from early on. A considerable number of methods to maintain power quality or reduce power distribution losses have been developed and reported [1–11]. For example to counter voltage increase and fluctuation, voltage control methods using load tap change transformer, static reactive power compensator, and storage battery have been already developed [1–4]; to reduce power losses of distribution networks, high‐voltage distribution network configuration planning methods [5–7] and reconfiguration methods by switch operation have been so far reported [8–10].…”