Providing Power Quality Research Articles

Application of Deep Learning Gated Recurrent Unit in Hybrid Shunt Active Power Filter for Power Quality Enhancement

This research work aims at providing power quality improvement for the nonlinear load to improve the system performance indices by eliminating maximum total harmonic distortion (THD) and reducing neutral wire current. The idea is to integrate a shunt hybrid active power filter (SHAPF) with the system using machine learning control techniques. The system proposed has been evaluated under an artificial neural network (ANN), gated recurrent unit, and long short-term memory for the optimization of the SHAPF. The method is based on the detection of harmonic presence in the power system by testing and comparison of traditional pq0 theory and deep learning neural networks. The results obtained through the proposed methodology meet all the suggested international standards of THD. The results also satisfy the current removal from the neutral wire and deal efficiently with minor DC voltage variations occurring in the voltage-regulating current. The proposed algorithms have been evaluated on the performance indices of accuracy and computational complexities, which show effective results in terms of 99% accuracy and computational complexities. deep learning-based findings are compared based on their root-mean-square error (RMSE) and loss function. The proposed system can be applied for domestic and industrial load conditions in a four-wire three-phase power distribution system for harmonic mitigation.

Electro-Thermal Control on Power Electronic Converters: A Finite Control Set Model Predictive Control Approach

<div class="section abstract"><div class="htmlview paragraph">With the increasing attention towards electric vehicles (EV), power electronics technology has become more prominent on vehicular systems. EV requires compact energy conversion and control technology to improve system efficiency and optimize the sizing of power components. Therefore, it is important to reduce thermal losses, while supplying an adequate amount of power to different EV devices. Silicon carbide (SiC)-based power semiconductors provide performance improvements such as lower power losses, higher junction temperature and higher switching frequency compared to the conventional silicon (Si)-based switching devices. High-frequency switching is preferred for power converters to minimize the necessity of passive filters; however, high-frequency switching causes additional thermal stress on semiconductor switches due to the increase in switching losses. The degradation of switching devices in power converters are primarily related to the junction temperature. One method to improve the lifetime of semiconductors is to control the module junction temperature by controlling switching losses in the switching state, while providing power quality in the required limits and maintaining voltage stability. This concept is referred to as active thermal management. This paper illustrates the Finite Control Set Model Predictive Control (FCS-MPC) approach on how electrical performance can be preserved while providing electro-thermal management for the SiC-based switching devices on three-level three-phase power converter to improve system efficiency and reliability.</div></div>

Power Quality in Railway Traction and Compensation by Combining Shunt Hybrid Filter and TCR

This paper analyses the quality of electricity in railway traction. Power quality characteristics have been measured as a case study in a traction sub-station in Tamil Nadu, India, where 1400 KVAR capacitor bank is installed. The actual data has been obtained through direct supply of traction load. Harmonics and various power quality problems are generated through the load of current. The emerging power problems need attention to rectify the polluting sites. Issues are measured by providing power quality analyzer and compared with IEEE standards 519-1992. Simulation has been done to improve the power quality issues such as harmonics, power factor and reactive power by using a combination of shunt hybrid filter and Thyrsitor Control Rectifier.

Control scheme for grid‐tied distributed generation inverter under unbalanced and distorted utility conditions with power quality ancillary services

This study proposes a control scheme with a new fundamental sequence components extractor for grid interfaced distributed generation inverter under polluted grid conditions. The proposed sequence extractor is realised using third-order sinusoidal signal integrator-based frequency adaptive filters. It has an excellent ability to decompose the three-phase voltage and current signals into positive and negative sequence components under distorted grid scenario. The proposed control scheme is immune to frequency variations and is capable of providing power quality ancillary services such as reactive power compensation and harmonics rejection in addition to basic power injection. The performance of the proposed system under various grid disturbances and loading conditions is evaluated through simulation and experimental studies.

Power Quality in Railway Traction and Compensation by Combining Shunt Hybrid Filter and TCR

This paper analyses the quality of electricity in railway traction. Power quality characteristics have been measured as a case study in a traction sub-station in Tamil Nadu, India, where 1400 KVAR capacitor bank is installed. The actual data has been obtained through direct supply of traction load. Harmonics and various power quality problems are generated through the load of current. The emerging power problems need attention to rectify the “polluting” sites. Issues are measured by providing power quality analyzer and compared with IEEE standards 519–1992. Simulation has been done to improve the power quality issues such as harmonics, power factor and reactive power by using a combination of shunt hybrid filter and Thyrsitor Control Rectifier.

An interactive–dynamic mechanism conceptualizing the cost and benefit of electric power quality

With the deregulation of the electric power energy market, providing power quality has become a more important concern of both power suppliers and customers. Customers require better quality with the development of digitally controlled facilities. However, there is not a specific infrastructure to motivate the design of the power system to achieve a specified level of electric power quality. This paper discusses a power quality interactive–dynamic control mechanism to conceptualize the cost and benefit of power quality. The basic objective is to provide an engineering infrastructure and procedure that ‘gives the right signals’ to the power supplier and the customer to balance power quality and cost. A power quality level index vector is utilized in the proposed infrastructure.

An Interactive-Dynamic Mechanism Conceptualizing the Cost and Benefit of Electric Power Quality

With the deregulation of the electric power energy market, providing power quality has become a more important concern of both power suppliers and customers. Customers require better quality with the development of digitally controlled facilities. However, there is not a specific infrastructure to motivate the design of the power system to achieve a specified level of electric power quality. This paper discusses a power quality interactive-dynamic control mechanism to conceptualize the cost and benefit of power quality. The basic objective is to provide an engineering infrastructure and procedure that “gives the right signals” to the power supplier and the customer to balance power quality and cost. A power quality level index vector is utilized in the proposed infrastructure.

ENERGY STORAGE FOR A COMPETITIVE POWER MARKET

▪ Abstract This article discusses briefly the status of energy storage technologies and explores opportunities for their application in the rapidly changing US energy marketplace. Traditionally, electric utility energy storage has been used to store low-priced purchased or generated electric energy for later sale or use when energy cost would otherwise be much higher. But deregulation and restructuring in the electric industry, coupled with an expanding portfolio of storage alternatives, may lead to many new opportunities for energy storage, especially within the energy distribution infrastructure, and for maintaining or providing power quality at large customer sites. Small, modular, robust energy storage technologies could be used to solve a range of energy supply and infrastructure-related needs. This article provides quantitative evidence of utility-related energy storage status, benefits, and opportunities.