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This paper proposes a new demand-side management (DSM) scheme for the autonomous DC microgrid for the future building. The DC distribution system is considered as a prospective system due to the increase of DC loads and DC power sources such as photovoltaic (PV), and battery bank (BB). The BB responds to the changes in a power imbalance between PV generation and demand within an autonomous DC microgrid...
This paper proposes a new demand-side management (DSM) scheme for autonomous DC microgrid for the future building. The DC distribution system is considered as a prospective system due to the increase of DC loads and DC power sources such as photovoltaic (PV), and battery bank (BB). The BB responds to the changes in power imbalance between PV generation and demand within an autonomous DC microgrid...
This paper presents a compressive introduction to the development of a simulation platform for smart multi-terminal DC micro-grid (sMTdc), this tool will facilitate the development of DC network to support a low-carbon sustainable electricity supply system. The simulation platform uses a compressive set of high-resolution (1-min) sub-models: generation (photovoltaic, wind power), demand (individual...
DC microgrid provides the horizontal infrastructures to integrate distributed generation (DG) and loads. The protection of DC microgrid is a quite challenging task. Unlike conventional AC system, the DC system cannot survive or sustain high-magnitude fault currents. The nodal analysis with overcurrent (NAOC) scheme is proposed for fault detection and isolation in the service main and DC bus without...
This paper presents the technical challenges associated with the proposed control techniques and an analysis performance of speed control of permanent magnet synchronous motor (PMSM), their control strategies and advance power electronics technologies to control PMSM. To control of PMSM drive used different control methods like, scalar control, direct torque control (DTC), vector control, frequency...
The paper evaluates new power quality (PQ) indices proposed for economic loss calculation due to poor PQ, for a rural power distribution company. For calculation of economic loss, data is needed from supply side and consumer side as well. In general, accurate data is not available at both sides. And for economic loss calculation due to poor PQ, it becomes necessary to do assumptions of some data....
Under distorted grid conditions with high bandwidth, synchronous reference frame (SRF) Phase Lock Loop (PLL) is able to work properly but increased bandwidth introduces harmonics which affect the PLL output and SRF PLL is also not able to produce accurate phase information under distorted grid conditions. This paper suggests a new phase detection technique based on cosine look-up table (cLUT) using...
In future the dynamical system which is highly nonlinear & unstructured would be required a more precise control system. Various issues for the stabilization of the plant with parametric uncertainties and unpredictable environments remain unsolved. Sliding mode controller (SMC) is one of the nonlinear robust controller that can solve these issues. In this paper the robustness property of the PID...
This paper discusses three types of current controllers with an active damped inductor-capacitor-inductor (LCL) filter for grid connected solar photovoltaic (PV) system. Grid current is considered as the feedback variable in the first controller. The filter capacitor is divided into two parts and the current between the split capacitor is considered in the feedback to actively damp the resonance peak...
DC microgrids are desired to provide the electricity for the remote areas which are far from the main grid. The microgrid creates the open horizontal environment to interconnect the distributed generation especially photovoltaic (PV). The stochastic nature of the PV output power introduces the large fluctuations of the power and voltage in the microgrid and forced to introduce the controller for voltage...
Transformers range in size from a few kVA to several hundred MVA are one of the most critical components of power system with with replacement costs around millions of dollars for power transformers. A sudden in-service failure of a transformer not only results in substantial economic losses but also can result in death of utility personnel apart from the environmental damages caused and grid instability...
In the present scenario, electronic load is continuously increasing in the buildings which needs Direct Current (DC) input. These loads require conversion from AC to DC power. On the other hand the Renewable Energy Sources (RES) such as Solar Photovoltaic (PV) produce DC power which has to be converted into AC to tie into electric power systems and again converted into DC for DC compatible loads....
This paper addresses a control technique for grid connected solar PV system in distributed generation applications. This control technique is based on dual loop controller which combines an Integral Sliding Mode Control (ISMC) in the inner current control loop and Robust Servomechanism (RS) control is used in the outer voltage control loop. The objective of the dual loop controller is to achieve better...
In this paper induction motor model has been developed in three phase frame of reference. A qualitative and analytical approach has been adopted to consider the effects of rotor and stator slots with winding harmonics. Chronological inclusion of rotor slot effects and winding harmonics establishes the model. This order builds up the self and mutual inductance matrices which are the key variables used...
The condition of transformer windings can be gauged by monitoring their equivalent circuit parameters. These parameters are not affected by external faults and change only in the presence of an internal aberration. Changes in the insulation temperature are reflected in winding temperature and can be monitored by observing the winding resistance values. Similarly changes in the short circuit reactance...
Power produced from the Renewable Energy Sources (RES) is directly feeding to the electric grid via Power Electronic Circuits (PEC). Grid connected solar Photovoltaic (PV) system requires a high quality of grid monitoring techniques in order to detect the phase angle, voltage magnitude and frequency and also to meet standard specifications in terms of achieving power quality and safety. Various techniques...
Induction machines (IMs) account for a bulk portion of electric energy consumed in industrial applications. The efficiency and power factor of the IMs have been remarkable impact on running cost. In this work, a practical field work data have been taken up as Jindal Steel Plant (JSP) in India, where there were more than 300 Induction Machines ranging from small one HP to large 200 HP. Furthermore,...
Today at any major university it is not possible to sustain a viable undergraduate program in electric power without having a productive research program. The faculties will also have to develop depth in areas associated with their expertise and breadth in terms of ability to assimilate and apply support disciplines to the problems in electric power engineering. Maintaining and teaching a modern curriculum...
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