Determination of the optimal control parameters of voltage regulators installed in a radial distribution network

Abstract

This paper presents a new computation method to determine simultaneously the optimal parameters of several voltage regulators such as the load-ratio control transformer (LRT) and step voltage regulator (SVR) installed in a radial distribution network. The proposed method determines a combination of their control parameters by minimizing the weighted sum of deviations of line voltage from the upper and lower voltage limits and the amounts of voltage violations by referring to the stored data measured by IT switches, which are sectionalizing switches with sensors installed in the distribution feeder. The optimization algorithm is based on particle swarm optimization (PSO), which is one of the nonlinear optimization methods, by using the concept of swarm intelligence. In order to confirm the validity of the proposed method, numerical simulations are carried out on a distribution network model. 

Semicentralized voltage control method using SVR based on past voltage measurements in distribution network

“…Among three control parameters, we focus on the determination of V ref . As discussed in Refs , V ref and parameters of the line drop compensator (LDC) have traditionally been considered optimized parameters for the autonomous voltage control of OLTC and SVR. While this study does not use the LDC following the actual operation of Chubu Electric Power Co., Inc. (CEPCO), only the time series of V ref is determined.…”

Designing Sustainable Smart Cities: Cooperative Energy Management Systems and Applications

“…Various types of EMSs are indispensable components for realizing sustainable and efficient use of energy in smart cities. For example, the large-scale penetration of distributed PV systems for residential houses has promoted the development of voltage control technology in energy management on the power system [183] from a viewpoint of maintaining power quality. Similarly, penetration of controllable energy appliances such as battery storage systems and EVs will promote the advancement of energy management technology for automated demand shifting and peak shaving schemes from the viewpoint of efficient energy use while avoiding congestion when maintaining local capacity constraints.…”

Integrated volt/Var control in modern distribution power systems based on support vector machines

“…Generally, three types of volt/Var control methods can be found in the literature [10][11][12][13][14][15][16][17][18][19]: local control, decoupled control and IVVC. The local control is a noncentralized technique, and it is primarily based on a stored set of predetermined rules (e.g., "if power factor is less than 0.95, then switch capacitor bank #1 on" or "if voltage is higher than 1.05 pu then lower the tap of voltage regulator #2").…”

“…Generally, three types of volt/Var control methods can be found in the literature: local control [8,14] decoupled control [10,11,14] and integrated control [13][14][15][16][17][18][19]. The local control is a noncentralized technique, and although this naturally leads to simpler structure, such technique does not lead to optimal solutions.…”

“…The main issue is that the interdependency between voltage and reactive power is neglected. On the other hand, in the case of the integrated control, such interdependency can be considered [13][14][15][16][17][18][19]. The importance of such interdependency can be seen experimentally where, for example, it is verified that if the voltage is outside its acceptable limits, the voltage regulator tap is changed.…”