Electricity plays an important role in the socioeconomic growth and social prosperity of any country. It is to be considered as basic need for human development. Nowadays, low production electricity a serious problem Pakistan, which directly restricts development state. One-third Pakistan’s population does not have rural areas about 10–12 hours load shedding urban quite common. Although, state Pakistan always shows deficit conventional resources, but no progress was also being made renewable...

The non-renewable energy resources are limited and depleting gradually. As such, security has attained the greatest amount of attention globally than ever before. In meantime, crises already affecting developing countries such as Pakistan, even though one-third population country is not connected to national electricity grid. with access on-grid enduring load shedding more 12 h a day. This situation alarming require immediate required so add alternative country, which long been relying on...

The doubly fed induction generator (DFIG)-based wind energy conversion system (WECS) suffers from voltage and frequency fluctuations due to the stochastic nature of speed as well nonlinear loads. Moreover, high penetration into power grid is a challenge for its smooth operation. Hence, symmetrical faults are most intense, inflicting stator winding low voltage, disturbing low-voltage ride-through (LVRT) functionality DFIG. vector control strategy with proportional–integral (PI) controllers...

With the development of modern industrial technology a large number non-linear loads are used in power system, which causes harmonic distortion system. At same time quality and safe operation becomes inferior. Therefore mitigation harmonics is very necessary under situation. This paper presents design two passive filters to reduce current produced by nonlinear Matlab /simulink software has been for simulation purpose. The results have obtained with without installation then it observed that...

This study aims to propose a simulation as well mathematical model carry out the performance assessment and efficiency improvement of stand-alone Parabolic Solar Dish Stirling (PSDS) system. The for 25 ​kW PSDS system is performed in System Advisor Model (SAM) under environmental conditions Jamshoro, Sindh, Pakistan. results show that city has good potential direct solar irradiance with yearly average value 1719.15 ​kWh/m2/y. can generate 38.6 ​MWh overall net 23.39%. Whereas, maximum energy...

When the on-time is constant during a line cycle, input power factor (PF) of critical conduction mode buck-buck/boost correction converter low. A variable control (VOTC) scheme put forward in this paper to realize high PF. By utilizing and output voltage modulate buck buck/boost switch, we can high-input PF with low-total harmonic distortion within universal range. The operating principles comparative analysis conventional (COTC) VOTC are analyzed. proposed achieves efficiency as compared...

In this study, a stand-alone parabolic solar dish/Stirling (PSDS) system model is developed and investigated. The techno-enviro-economic performance of 25-kW PSDS simulated in the System Advisor Model (SAM) tool under ambient conditions Jamshoro, Pakistan. avoided CO2 emissions due to installation proposed are calculated an Excel spreadsheet. methodology for calculation based on average value per kWh recommended by Intergovernmental Panel Climate Change (IPCC). results indicate that...

This paper presents an efficient Low Voltage Ride Through (LVRT) control scheme for a 10.0MW grid-tied Permanent Magnet Synchronous Generator (PMSG)-based wind farm. The proposed strategy plans to enhance the power quality and amount of injected satisfy grid code requirements. approach utilizes static Shunt Var Compensator (SVC) LVRT capability improve quality. It has been observed from outcomes study that SVC controller ensures safe reliable operation considered PMSG-based system. system...

Distributed generation (DG) technology is spreading rapidly owing to advantages of clean environment, loss reduction and voltage improvement. Utilities in Pakistan are welcoming all generations increase their supply capacity. Industries installing DGs meet load requirements. In order reduce energy bills, being used spare power back utility or even off peak durations. DG interconnection changes electrical network characteristics existing network. Protection problems may occur the form relay...

This paper demonstrates the designing parameters of a solar parabolic dish prototype for rustic areas with great irradiance rate availability, where have no access electricity services or low-income people survives to buy stove (electric gas). The intends solution against these types remedies and pursues light work. has polished surface, radiations fall collected at single concentrated focal point. At this point form energy is used derive different thermal applications like as; cooking...

This paper deals with power quality problems encountered in weak AC microgrids and solutions for mitigation. A electronic converter can be used as an effective conditioner to compensate non-idealities currents drawn from the grid. consisting of three converters connected a common DC link is analysed. One these acts active filter removing unwanted harmonics grid feeding non-linear load. The other two instead remove voltage at terminals sensitive control shunt designed fast enough servicing...

Buck Power Factor Correction (PFC) converter is widely used for a broad range of AC/DC applications because its many advantages like protection against short circuit, high efficiency at universal input voltage, low output less voltage stress on the switch, inrush current and component cast. However inherent dead zone introduces large harmonic distortion in average current, resulting (PF) Total Harmonic Distortion (THD). A constant on-time controlled Boundary Conduction Mode (BCM)...

The increase of power electronic converters at the end-user side is unavoidable and it will cause current harmonic distortion wide range disturbance in system (PS). This paper presents compensation for test case Quaid-e-Awam University College Engineering Sciences Technology (QUCEST) Larkana campus MATLAB SIMULINK by using three types filters i.e. passive, active hybrid filters. purpose this experiment simulation model to analyse find out best solution reducing unbalanced load condition...

Improving power quality disturbance (PQD) detection and automatic classification has been a major concern ever since the emergence of sensitive non-linear devices. The role distributed generation in system is main source PQDs. Short-term long-term duration single multiple complex PQDs are difficult to monitor need higher accuracy time. This paper presents analysis different distinctive combinations Variety PQD samples generated using Matlab environment conferring IEEE STD 1159-2009. Such...

The dead zone in the buck converter can be eliminated by integrating flyback with it. However, its input Power Factor (PF) is low when operated Constant On-Time Control (COTC). In this paper, a Variable (VOTC) strategy proposed for Integrated Buck-Flyback Converter (IBFC) simple structure to obtain unity PF. By feed forwarding and output voltage change on-time of both switches, high PF achieved. operating principle IBFC discussed types control schemes verifying effectiveness VOTC scheme;...

Buck power factor correction (PFC) converter is widely used for a broad range of AC/DC applications because its many advantages However, the traditional discontinuous conduction mode (DCM) buck operates on constant duty-cycle control (CDCC) scheme, due to which input (PF) low.For improving PF near unity, variable-duty-cycle (VDCC) method has been proposed.Fitting also introduced make circuit implementation easier.For verifying validity proposed technique, simulation results are carried out.

Power Quality (PQ) has become a major concern owing to its increased use of sensitive electronic equipment. In order improve PQ problems, the detection and classification Disturbances (PQDs) must be carried out first. This paper presents simple software based technique for PQDs by time-frequency analysis Wavelet Transform (WT) as features extraction Artificial Neural Network (ANN) classifier. approach detects classifies types Waveform Distortion (WFD) problems selecting suitable feature with...

UPS Uninterruptible power supply) is used as backup when the input source, usually national grid, fails to give a load. In addition growing use of electronic devices in industrial and residential systems, such UPS, controlled rectifiers, SMPS (Switch Mode Power Supplies), DC Converters, there serious problem caused by harmonics AC mains, which lowers quality. Harmonics can cause variety problems, including sensitive equipment failure, resonance issues, heated wires, loss, inefficient...