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This paper presents a tool for improving recloser-fuse coordination to enhance distributed generation (DG) installed capacity in electrical distribution systems. The proposed tool could be used to solve recloser-fuse miscoordination problems based on fuse-saving principles. Moreover, it can increase power transfer capability from DG to load by changing the time dial of the recloser and fuse size simultaneously...
This paper presents an intelligent lighting energy management system which is combined with six lighting control functions i.e. occupancy control, time scheduling, daylight control, task control, personal control and variable power shedding. There are two modes in the proposed lighting management system, which are the automatic and the personal control. Users can also control the system through the...
This paper presents a new strategy for improving recloser-fuse coordination to enhance distributed generation (DG) installed capacity in medium voltage distribution systems. The proposed algorithm could be used to solve recloser-fuse miscoordination problems based on fuse-saving principles. Moreover, it can increase power transfer capability from DG to load by changing the time dial of the recloser...
This paper presents an analytical assessment of upgrading primary electrical feeders from a radial to a normally closed-loop arrangement in an existing distribution system. Distribution system performance, including system power loss reduction, feeder loading conditions, voltage profile improvement, and reliability enhancement in the system was evaluated and analyzed using DIgSILENT PowerFactory software...
This paper presents a simple and practical method for determining reliability indices of radial and loop electrical distribution systems by using an automatic tool. This tool is developed by writing DIgSILENT Programing Language (DPL) script for determining reliability indices of each load point and the whole systems. By using this tool, a large existing distribution system can be easily analyzed...
In this paper, a new hybrid particle swarm optimization (HPSO) based on particle swarm optimization (PSO), evolutionary programming (EP), tabu search (TS), and simulated annealing (SA) is proposed. The aim of merging is to determine the optimal allocation of multi-type flexible AC transmission system (FACTS) controllers for simultaneously maximizing the power transfer capability of power transactions...
In this study, the hybrid particle swarm optimization (hybrid PSO) based on particle swarm optimization (PSO), evolutionary programming (EP), and tabu search (TS) is proposed to determine the optimal allocation of multi-type flexible AC transmission system (FACTS) controllers. Simultaneous-maximized power transfer capability of power transactions between generators and loads without violating system...
This paper presents a comparison study of two major distributed generation islanding detection methods including rate of change of frequency (ROCOF) and over/under frequency (OUF) techniques which could be used for Provincial Electricity Authority (PEA) distribution systems. The analysis is based on the detection time in different scenarios and false operations. Two practical distribution systems...
Electrical insulators of the Provincial Electricity Authority (PEA) of medium system are mostly porcelain insulator types that consists of suspension, pin type, line post, and pin post insulators. The distribution lines will be polluted by industrial contaminants, salt fog or natural dust. Experience shows that pollution flashover is one of the main natural calamities harming and affecting the voltage...
In this paper, hybrid tabu search and simulated annealing (TSSA) with search space managing methods are proposed to determine the optimal number and allocation of unified power flow controller (UPFC) to enhance power transfer capability of power transactions between generators and loads in power systems. Particular optimal allocation includes optimal locations and parameter settings. The objective...
In this paper, hybrid tabu search and simulated annealing (TSSA) with search space managing methods are proposed to determine the optimal number and allocation of FACTS controllers to enhance power transfer capability of power transactions between generators and loads in power systems. Particular optimal allocation includes optimal locations and parameter settings. Two types of FACTS controllers including...
In this paper, evolutionary programming (EP) with optimal maximum number of FACTS controller and search space managing methods are proposed to determine the optimal allocation of FACTS controllers to enhance power transfer capability of power transactions between generators and load buses. Particular optimal allocation includes optimal locations and parameter settings. Two types of FACTS controllers...
This paper presents the electrical and thermal characteristics of distribution class - metal oxide varistor (MOV) under power frequency AC voltage changes. The leakage currents of MOV arresters are measured over a period of time against 1.0 – 2.0 p.u. of system voltage. For the experimental study, the thermal runaway property of MOV is closely related to the temperature limit which depends on the...
Capacitor allocation in power transmission systems have been considered to improve voltage profile and reduce power loss. An evolutionary programming (EP) is a computationally efficient methodology for the optimal capacitor allocation in power transmission network. The method is chosen due to its robustness and its ability to handle many practical constraints, explore all possible solutions, and find...
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