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A PhotoVoltaic Array (PVA) model is developed in this paper using basic circuit equations of the PhotoVoltaic (PV) solar cells including the effects of temperature changes and solar irradiations. An attempt has been made in this paper to analyze the performance of a Boost Converter using Sliding Mode Controller when it is fed with a PV source. The performance, when compared with a PI controlled Boost...
The large requirement of power for fulfilling daily demands cannot be supplied with the help of a single unit or stored power, a large number of generating units are required to complete this demand. The scheduling of these units so as to generate the forecasted power at a minimum cost is known as Unit commitment problem. It is one of the basic optimization problems in power systems. Different algorithms...
This paper presents the real time simulation and validation of a proposed control strategy of three-phase Voltage Source Inverter (VSI) for integrating the three-phase loads and utility grid to the DC Microgrid (DCMG). The proposed DCMG consists of wind turbine, solar-photovoltaic distributed generators, battery energy storage system, and loads. The proposed control scheme, using feedback and feed-forward...
Electricity markets of many countries, which are in developing phase, are facing problems like frequency fluctuations, generation deficiency and their performance is very sensitive to small disturbances. Operation of such power system is a challenging task and innovative strategies are required to get rid of these problems. Power utilities of India have introduced new tariff mechanism, Availability...
This paper proposes a high performance instantaneous resistance maximum power point tracker (MPPT) for photovoltaic (PV) systems under rapidly changing atmospheric conditions. This algorithm is based on the derivative of the power with respect to the instantaneous resistance, which vanishes at the MPP of the power-instantaneous resistance characteristics. The authors wish to present this algorithm...
Presently world facing crisis of power all over the world. For a comfort survival, mankind has to adopt different methodologies to over come this shortage and instability of different parameters in power system. Here, the most concern parameters are voltage and frequency variation. Moreover, voltage variated is a big issue in power system particularly distribution end voltage. This paper introduces...
This paper proposes a novel MPPT algorithm with a different philosophy wherein the instantaneous operating power point of the PV module is made to directly track the maximum power point. This reference maximum power is computed from the mathematical model of module using the real-time values of module parameters. Unlike other MPPT methods, this technique possesses very fast tracking characteristics,...
In this paper, a novel method of model order reduction is presented by integrating the merits of Firefly Algorithm (FA) with Pattern Search (PS) algorithm. A linear-continuous single-input single-output system of higher order has been taken up and reduced to a lower order system. FA acts as a global optimizer while PS performs the local search in the hybrid topology to minimize the time response based...
FACTS Technology makes transmission grid more smart and controllable. Distributed Static Series Compensator (DSSC) is a Distributed FACTS device and it can be attached directly on existing transmission line to provide cost effective power flow control through line. DSSC alters line reactance and provides reactance compensation in inductive and capacitive mode of operation. In this paper voltage stability...
Enhancing the reliability of pumped storage hydroelectric system is mandatory for building the stable network. This paper experimentally analyses the electrical and mechanical effects of voltage unbalance on doubly fed synchronous (fixed speed) machine and doubly fed asynchronous (variable speed) machine operating under motoring mode. The input electrical quantities such as stator current, rotor current,...
This paper presents a simple demodulation technique based control algorithm for a three phase single stage grid connected solar Photovoltaic (PV) system to improve power quality of the distribution network while injecting power to AC grid. The demodulation technique is tuned at fixed frequency and has no stability issues due to open loop structure. The most important advantage of this technique is...
Phasor Measurement Unit (PMU) provides the online state estimation and faster monitoring, protection and control of power system. However, PMU installation at every power system buses is an uneconomical decision. Vowing to this, various methodologies have been suggested in past to determine the optimal locations of these devices in order to retain the observability of the system. However, the costs...
Multi Level Inverters (MLI) are widely used in the field of industrial applications. By using MLI harmonic contents and Electro Magnetic Interference (EMI) in different power electronics applications can be reduced. Switching function and reduced switching components of MLI are discussed in this paper. Output voltage levels of MLI can be increased by adding up switching components and DC input voltage...
Fast consumption of non-renewable resources of energy has led to the need of harnessing energy from renewable resources of energy. Solar energy is one of the most efficient and easily available sources of renewable energy in India. The difficulty with solar energy is the changing position and nature of sun due to which the ambient temperature and irradiance level are changing throughout the day. This...
This paper presents the concepts of conventional electric traction system and the advanced transportation systems adopted for research and commercialization in Indian railways. A comparative study is presented on Conventional systems, Metro transit, Pendolino trains, Talgo transit system and Maglev technologies. The principle requirements, control mechanisms, merits and demerits of electromagnetic...
An EV (Electric Vehicle) is becoming more popular these days in transport sector due to its environment friendly operation as well as availability at reduced cost. The battery charging process is the prominent matter of concern in an EV because of power quality issues in the input current drawn by the charger. These issues are generated mainly because of the nonlinear nature of the diode bridge rectifier...
Sudden change in reactive power demand from load side leads to the voltage instability problem of the power system. This disturbance can be tackled by the proposed STATCOM (static synchronous compensator) model. It consists of four three-level VSC (voltage source converter) along with four zigzag transformers to form 48-pulse VSC. To reduce the voltage stress on the switching devices the DC link voltage...
This paper presents the analysis for congestion in network utilizing load flow and optimal power analysis. The system was tested for the various Optimal Power Flow technique with different weighing factors and the results obtained were analysed for various comparative factors to develop an optimal system. The optimization carried out on the system minimised the power flow losses and thus minimising...
In this paper a zero-voltage, zero-current high boosting converter using an auxiliary soft-switching network is presented. The high boost ratio is realized by an interleaved boost converter with charge-pump on the load side. Due to the parallel structure of the converter, the auxiliary soft-switching network is capable of providing both zero-voltage and zero-current transitions to the main switches...
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