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Distribution grids include medium and low voltage lines that are involved in the delivery of electricity from substation to end-users/loads. A distribution grid is operated in a radial/tree-like structure, determined by switching on or off lines from an underling loopy graph. Due to the presence of limited real-time measurements, the critical problem of fast estimation of the radial grid structure...
In countries such as India with low grid prices, energy firms are offering competitive PPA tariffs by setting up large solar farms. Given lower margins in operating these farms, there is great sensitivity to panels underperforming. To detect under-performance, existing condition monitoring methods compare generated power with an ideal yield calculated based on local weather conditions. Applying such...
Facing current and future developments of the energy system, including the integration of large numbers of renewable energy sources and electric vehicles, live monitoring and control becomes essential for stable operation of the power grid. This transition to a Smart Grid requires coupling the power system with a reliable and real-time capable communication infrastructure. In response to this demand,...
In the power grid, Supervisory Control and Data Acquisition (SCADA) systems are used for executing various applications for monitoring and controlling purposes, which in turn enable stable operation of the grid. The integrity and timely delivery of SCADA data is critical to the operation of the grid and this makes them an attractive target for cyber-attacks. However, SCADA systems have various vulnerabilities...
By utilizing an inherently symmetrical differential structure, several boost DC/DC converters can be used to construct a multi input DC/DC or DC/AC converter. The use of integral state feedback based pole placement control strategy has been reported in the literature to control this type of converter. However, this control method is based on the small signal model of the circuit and highly dependent...
This paper deals with the optimal phasor measurement unit (PMU) placement problem. In large power system, it is costly to place too many PMUs to achieve real time global observability. In fact, system state can be well estimated by optimally placed limited PMUs' synchronous measurements. Based on the method of voltage control area division, a spectral clustering approach is proposed to divide the...
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