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As the impacts of distributed generators (DGs) on distribution systems are significant, this paper proposes a particle swarm-based optimization technique to define an optimal coordination of DGs, an under load tap changer (ULTC) including substation and feeder capacitors for volt/VAr control. The objective for the coordination is considered in the view point of the distribution system operators as...
The enhance benefit use of reactive power additional supplied by synchronous based distributed generators to reduce real power loss in distribution system is studied in this paper. Objective is to compare the amount of loss reduced between the constant power factor (CPF) and the optimal reactive power dispatch (ORPD) schemes. The former is a traditional scheme of controlling reactive power with a...
Recently, renewable energy technologies such as wind turbine generators and photovoltaic systems have been introduced as distributed generation. The connection of a large amounts of distributed generation causes voltage deviation beyond the statutory range in distribution system. In this paper, we propose a methodology for voltage control using tap changing transformers in distribution system and...
Reactive power control becomes extremely important after deregulation because costumers request high quality power supply with reasonable price. On the other hand, Distributed Generations (DGs) have attracted increasing attention due to considerations of environmental sustainability. Wind farm is one of the DGs and can provide considerable power generation. This paper presents a method using wind...
This paper first investigates a local voltage and reactive power control (local control) in a distribution system based on local control of on-load tap-changer (OLTC), substation capacitors, and feeder capacitors, and how the presence of induction machine based distributed generation (DG) affects it. A proper coordination among those available voltage and reactive power control equipment to minimize...
In spite of many profitable or advantageous natures of distributed generators (DGs), for power systems, such badly behaved natures of DGs as (1) unstable power output, (2) voltage problem, (3)harmonics, (4)reverse power flow, etc. also exist. Therefore, it has been always emphasized that the unfavorable effects should not exist when distributed generators are connected to the power system. However,...
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