In this paper a new optimization algorithm TLBO (Teaching and Learning Based Optimization) has been implemented to solve optimal multi Distributed Generator (DG) placement problem. This problem has been formulated for minimization of loss, capacity release of transmission lines and voltage profile improvement. To reduce search space and computational burden optimization has been done in two stages first to find the optimal locations for DG placement and latter to find the opti...

A four-level open-end winding induction motor (OEWIM) drive is known to suffer from two perennial problems. One is the problem of zero-sequence current in the motor phases, which is causedbytheexistence of zero sequence voltage in them. The other is the overcharging of the dc-link capacitor of the inverter operated with lower dc-link voltage by its counterpart operated with a higher dc-link voltage. This paper investigates the applicability of a special variant of space vector pulse w...

This paper presents a single-stage solution for PV fed three-phase induction motor (IM) water pumping system. The given solution uses time tested, two two-level cascaded H-bridge inverters to give three level voltage output to the IM pump drive. The proposed system is operated using the control strategy which includes Maximum Power Point Tracking (MPPT), Space Vector Pulse Width Modulation (SVPWM) and V/f control. The MPPT algorithm generates the modulation index ‘ma’ which is used to operate...

This paper presents a single-stage solution for a dual Maximum Power Point Tracking (MPPT) technique for a solar Photovoltaic (PV) fed water pumping system. The proposed solar PV fed pumping system uses a three-phase Open-End Winding Induction Motor (OEWIM) coupled to a centrifugal water pump. The OEWIM is connected via two time tested two-level three-phase inverters powered by two independent solar PV arrays. These two PV arrays can be configured independently and the employed dual MPPT ...

In this paper a hybrid method for improving the dynamic stability of the power system using UPFC is proposed. The novelty of the proposed method is combined performance of the Bat-inspired algorithm and Firefly Algorithm (FA), which provides improved searching ability, automatic subdivision and random reduction. Here, the bat-inspired algorithm optimizes the maximum power loss bus while the generator fault occurs, which inturn affects the power flow constraints like voltage, power l...

In this paper, the bat-inspired algorithm and the Gravitational Search Algorithm (GSA) based optimal location and ca pacity of UPFC are proposed to improve the dynamic stability of power systems. The novelty of the proposed method is in improved searching ability, random reduction and reduced complexity. Here, the GSA is used to optimize the location of the UPFC if a generator fault occurs. The GSA selects the maximum power loss line as the optimum location to place UPFC as per the object...

Induction heating (IH) technique has been widely used in industrial and domestic heating applications. In IH cooking applications, multi-output IH systems are increasing in demand. In this study, an inverter configuration is proposed for two-output IH cooking applications. The objective of this proposal is to reduce the component count and thereby the size of the circuit and cost. In this proposed configuration, two IH loads are connected to a full-bridge inverter output and these loads a...

In this paper Teaching-Learning-Based Optimization Algorithm (TLBO) is presented for solving the problem of placement of phasor measurement units (PMU) optimally in a power system network for complete observability. The TLBO algorithm enables optimal PMU placement by zero injection measurements and also by not including zero injection measurements. The algorithm has been tested on standard test systems such as IEEE 14-bus, IEEE 30-bus, IEEE 57-bus and the results are contraste...

Price forecasting is one of the main issues faced in deregulated market because of the dynamic behaviour of the electricity prices. In a day-ahead pool market, market participants need forecasted prices to submit their bids to the market operator. Accurate forecast can provide a risk free environment for the producers and consumers to invest into the market. Participants themselves feel that they can have assured return if the forecasted prices are accurate. This paper presents Elman Neural N...

This paper Proposes Probabilistic optimal power flow to analyse the variation of Locational Marginal Prices (LMPs) with penetration of wind energy. The uncertainty of wind speed and load is modelled using probability distribution functions based on their historical data. Integration of storage unit with wind is proposed to assess economic advantages. In this paper Two Point Estimation Method (2PEM) is used to develop Probabilistic Optimal Power Flow. IEEE-24 bus reliable test system is used t...

A four-level open-end winding induction motor (OEWIM) drive is known to suffer from two perennial problems. One is the problem of zero-sequence current in the motor phases, which is caused by the existence of zero sequence voltage in them. The other is the overcharging of the dc-link capacitor of the inverter operated with lower dc-link voltage by its counterpart operated with a higher dc-link voltage. This paper investigates the applicability of a special variant of space vector puls...

The three-level dual-inverter connected to Five Phase Open-End Winding Induction Motor (FPOEWIM) drive can have either isolated DC bus or a single DC bus. The single DC bus configuration is advantageous over the former, since, it avoids the use of bulky isolation transformers. But this configuration adds the zero-sequence current flowing through the common DC bus and the motor phase windings. This paper proposes a SVPWM technique to eliminate the zero-sequence current and also ...

In this paper, a single-stage solution for solar photovoltaic (PV) pumping system using a dual-inverter fed open-end winding induction motor drive is presented. The three-level dual-inverter requires a low PV bus volt agecomparedwithitsconventionalthree-levelcounterpart. This could avoid large string of PV modules and helps in reducing the voltage rating of the capacitors and semicon ductor devicesused in the system. This may further help in reduction of cost of the system. The propos...

The growing industrialization needs techniques to diagnose the incipient faults in induction motor at inception stage itself for avoiding the downtime of the production. In this regard detecting the faults in a 3-phase induction motor at an early stage is a vital component in process industries. The condition of the supply unbalance, under voltage and sudden load changes are other involuntary issues which may tend to exhibit current signature similar to the stator winding insulation...

Power system harmonics are inevitable in the presence of non-linear loads. The presence of harmonics has a greater impact on the terminal apparatus. Accurate analysis of Power system harmonics plays an important role to have a better mitigation. Windowed Interpolated FFT (WIFFT) based algorithms are gaining importance due to their accurate analysis. The major advantage of WIFFT based algorithms includes reduction in error due to spectral leakage and picket fence effect. This pa...

The increased usage of sensitive equipment by customers led to the importance of the term Power Quality. Classification of power quality events plays an important role to have an effective mitigation. This paper represents a new approach for classification of Power Quality events using S-transform. S-transform is an improved version of wavelet transform that includes phase information as well. S-transform is used for classification of various power quality events like voltage sag, voltage swe...

The current state estimators need to estimate the power system by means of the state variables i.e. voltage and current phasors accurately. Phasor measurement unit (PMU) is becoming a most prominent tool for monitoring, control and protection of electric networks, and hence it is required to employ them for the present and future power system networks. An optimal PMU placement (OPP) is quite important during planning studies for both existing and future power networks. So, when a...

As the increase in demand for electricity is not been supplied by adequate increase in electrical power generation, the pressure on the electric grids is tremendously growing. so, reliability and integrity is becoming more difficult, sometimes, which may leads to large blackout. In addition, the grid experiences sudden changes due to the inability of the relays to adjust to the prevailing network conditions on the occurrence of a disturbance. This can be reduced by continuous mo...

Now a days the power system structure is growing continuously. So the reliability has become a big task for the protection engineers. This paper presents a fast and accurate fault detection technique which is very much useful for reliable operation of the power systems. To achieve fastness and reliable operation various new technologies have been used but out of all the available equipment the use of phasor measurement unit have brought the reliability index to a significant lev...