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Voltage dip has been a serious problem in electricity networks. It accounts for the disruption of both the performance and operation of sensitive electrical and electronic equipments, which has reduced the efficiency and the productivity of power consumers across the globe. In order to secure quality power supply this problem needs attention for a sustainable solution. In the field of electrical power...
Generation disruption is associated with poor quality of power as it causes both frequency and voltage reductions and at its severity, hampers reliability of supply to the customers. Improving power quality and reliability (PQR) may become the key benefit of micro-grid if its generation adequacy is properly addressed at the planning stage. Again, higher reliability level requires system reinforcements,...
This paper reports on the modeling and simulation of a stand-alone photovoltaic (PV) plant with maximum power point tracking (MPPT) feature and dedicated battery storage. The overall plant comprises the PV module, battery bank, MPPT module, controller, inverter and a resistive load. The load is supplied by both the PV and the battery bank. The fluctuations in the output of the PV module are controlled...
This paper reports on the current UK scenario of islanded operation of active distribution networks with distributed generators (DGs). Different surveys indicate that the present scenario does not economically justify islanding operation of active distribution networks with DGs. With rising DG penetration, much benefit would be lost if the DGs are not allowed to island only due to conventional operational...
This paper presents the Z - source inverter for adjustable speed drive system. The Z - source inverter employs a unique impedance network couple with inverter main circuit. By controlling the shoot through duty cycle, the Z - source inverter system using MOSFETS provide ride - through capability during voltage sags, reduces line harmonics, improves power factor and high reliability, and extends output...
This paper presents a simulation study of operation and control of distributed generators (DGs) in power islands in Smart Grid environment. It examines the technical feasibility of DG islanding operation to exploit their services for improving electrical safety, security and quality of energy supply. The grid-connected DGs are initially operated at PQ mode and then switched to V-f mode to have full...
After the formation of a distribution company (DISCOM), it takes a lot of initiatives to become a preferred provider of reliable and competitive power to people it serves and a favored company to work for. This work covers the initiatives taken by a DISCOM in different areas like O&M process improvement, commercial process improvement, and customer care process improvement to enhance all the related...
In this paper, the authors deal with the issue of power quality phenomena in the distribution system that affects the reliability of the power supply to sensitive loads. Traditional solutions to power quality problems have been discussed here and the use of a microgrid as a preferred solution is presented. When the conventional and non-conventional micro sources are combined with energy storage devices,...
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