Power Quality Improvement In Grid Research Articles

Grid Power Quality Improvement in Wind Energy System using Three and Four Leg Inverter Control

During this paper Modelling and Control of Three and Four Leg Inverter in Wind Energy System for Grid Power Quality Improvement. Static Compensator (STATCOM) is connected at a point of common coupling with a battery energy storage system (BESS) to resolve the power quality difficulties. The battery energy storage utilized to preserve constant real power from varied wind generation. The generated power is often keep within the batteries at low power demand hours. The grouping of battery storage with wind energy generation system can mix the output by fascinating or inserting reactive power and allow the real power flow needed by the load. In the grid new renewable resources is supplemental to extract more power. Injection of wind generation into the grid affects the quality of power resulting in poor performance of the system. Wind energy is taken in to account to be a really promising various for power generation as a result of its various for power generation as a result of its tremendous environmental, social, and economic benefits. In general voltage & frequency should be kept as stable as possible. This stability are often obtained by utilizing the FACTS devices. Recently VSI or CSI based various FACTS devices have been used for flexible power flow control, secure loading and damping of power system oscillation. The FACTS Device (STATCOM) control scheme for the grid connected wind energy generation system to improve the power quality is simulated by using MATLAB/SIMULINK.

Power Quality Improvement of Grid Connected Photovoltaic Solar Systems using 3 level Inverter

This paper demonstrate simulation modeling of gridtied SPV systems with a 3 level inverter for power quality improvement using SVPWM. To extract maximum power MPPT is used. Three level inverters are used in high power and high voltage application with reduced harmonic contents. The grid tied PV system using three levels inverter has less harmonic contents as comparison of the conventional system or without a three level inverter. The simulation study reveals that the system with three-level inverter using the SVPWM technique generates less THD compared to the conventional system.

Sag and Swell mitigation and Power quality improvement in grid connected hybrid system using UPQC

Power quality is the major problem that always effects the cost and efficiency of the transmission and distribution system. The effective solution for this problem is to use the power conditioning devices to compensate the power quality problems. These power conditioning devices are made of power electronic converters. These imperfections are present in both the source and the load ends which are compensated by the Custom power devices like UPQC. The UPQC interfaced with hybrid system provides the controlled and standard output power even for the renewable sources which are the major developing trends in electrical power system. In this paper the solar and wind are the hybrid energy system which is connected to the transmission lines. The UPQC contains a DC link which controls the Sag and Swell, LG Fault and improves the power quality of the system. This system is executed in the MATLAB/SIMULINK.

Power Quality Improvement of Grid Connected Inverter using DSSC

In most of the distribution systems, major issue named as Power quality is concern. Maximum power quality problems including harmonic compensation, voltage sags and voltage flickers are mitigating using Distributed Flexible Alternating Current Transmission System (D-FACTS) Devices. Distribution Static Series Compensator (DSSC) is one of the DFACT devices. The Simulation and modeling of DSSC for grid connected inverter with power quality improvement is presented here. Also, complexity and cost can be reduced by using Distributed Static Series Compensator (DSSC). More capabilities are posses by the same. MATLAB SIMULINK model is presented in this paper with results and discussion. Here, Total Harmonics Distortion is calculated with & without DSSC.

Power quality improvement in grid integrated solar water pumping system using Vienna converter

Power quality improvement in grid integrated solar water pumping system using Vienna converter

Using inverter-based renewable generators to improve the grid power quality—A review

With the increasing penetration of renewable power in the grid, renewable generators are expected to play more important roles rather than merely working as active power sources. Considering the high controllability and considerable idle capacity of the inverter-based renewable generators, various auxiliary functions for them have been studied to benefit the grid. Among these auxiliary functions, the grid power quality improvement is very promising. This paper presents a review of the emerging control strategies for inverter-based renewable generators to improve grid power quality. The related papers are classified with different power quality issues and technical routes, and a comprehensive comparison is presented. The future trends of this research area are also discussed.

Power Quality Improvement in Grid from Wind Turbine by Using Shunt Hybrid Active Filter

Power Quality Improvement in Grid from Wind Turbine by Using Shunt Hybrid Active Filter

THD Reduction and Power Quality Improvement in Grid Connected PV System

THD Reduction and Power Quality Improvement in Grid Connected PV System

Power Quality Improvement in Grid Connected PV System

Power Quality Improvement in Grid Connected PV System

Performance Analysis of Bang-Bang and d - q Reference Frame Control Schemes for Power Quality Improvement of Grid Connected Wind Energy System

Performance Analysis of Bang-Bang and d - q Reference Frame Control Schemes for Power Quality Improvement of Grid Connected Wind Energy System

Standalone micro grid power quality improvement using inertia and power reserves of the wind generation systems

This paper proposes two controllers for employing part of variable speed wind generation systems kinetic energy in supporting the standalone MG frequency. The first controller acts similar to the frequency droop control, while the second controller emulates both the inertia response and the frequency droop control simultaneously. The MG frequency dropped only to 49.9 Hz with employing the proposed controllers compared with 49.68 Hz without employing the proposed controllers. Also, the injected active power from the storage device dropped from 20 kW to only 3 kW after employing the proposed controllers. In addition, the reactive power capability of the Double Fed Induction Generator (DFIG) wind generation system has been employed to maintain the standalone MG bus voltage at acceptable level. If there are fixed speed wind generation systems in the standalone MG, this paper proposed using the pitch angle controller to employ a suitable wind turbine power reserve in MG frequency supporting during the standalone mode. Results proved the effectiveness of the proposed controllers in improvement the MG overall performance during and subsequent the islanding occurrence.

A review on grid power quality improvement in wind energy system using STATCOM with BESS

A review on grid power quality improvement in wind energy system using STATCOM with BESS

Power Quality Improvement of Grid Connected PV System Using Dynamic Voltage Restorer

Power Quality Improvement of Grid Connected PV System Using Dynamic Voltage Restorer

Power Quality Improvement of Grid Connected Wind Farms through Voltage Restoration Using Dynamic Voltage Restorer

Increasing sensitivity of the loads with respect to power quality has gained the interest of power system analysis and power quality improvement techniques. The voltage sags or swells which are characterized by rms voltage variations outside the normal operating range of voltages due to faults may lead to improper disconnection of wind turbines. This paper deals with the effective voltage sag/swell mitigation using Dynamic Voltage Restorer (DVR), to regulate the terminal voltage of the wind farm. The DVR utilizes a feed forward vector control based algorithm to generate the PWM based firing signals for injecting appropriate compensation voltages. The actual wind farm field data of the voltage sag and swell events during fault conditions are re- created using MATLAB/Simulink and restored by employing DVR. The simulation results are shown to verify the operation of DVR during balanced voltage sag and swell conditions.

A Dual Operation of PV-Statcom as Reactive Power Compensator and Active Power Injector in Grid Tie System: Power Quality

The Green Energy Resources like Solar and Wind energy sources are playing a vital role to reach the capital power demand. The distribution system consist almost all reactive and sensitive loads, which may cause the power quality concerns like reactive power demand, low power factor, harmonic currents and etc. in power system. Reactive power is a determinant factor for efficient and effective operation of electric power system, so that the power engineers are concentrating to manage the reactive power at desired level. This article describes the dual operation of PV Solar plant as PV-Statcom for active power (P) and reactive power (Q) injection and absorption for power quality improvement in grid integrated proposed system. The PV-Statcom control pattern for enlarging quality of power is simulated in MATLAB/Simulink.

English

English

Fuzzy Based Power Quality Improvement In Grid Connected Microgrid At The Distribution Level

Fuzzy Based Power Quality Improvement In Grid Connected Microgrid At The Distribution Level

Power Quality Improvement In Grid Connected Windenergy System Using Statcom

Power Quality Improvement In Grid Connected Windenergy System Using Statcom

Modeling and Power Quality Improvement of Grid Connected Induction Generators Driven by Turbo-Expanders

Nowadays, the energy crisis has forced the need to recover the energy which is normally wasted in industrial processes. Gas pressure reducing process in city or power plant gas stations is one of these processes in which the energy is wasted. This work is done by turbo-expanders in parallel with gas regulating valves. In electrical industry, these devices drive generators to produce electrical power from the main process. In this paper a model for turbo-expander is presented. This model which utilizes an online calculation method is more efficient and simpler than the older offline model which surmounts the need for making complicated lookup tables prior to calculation. Because of instantaneous varying of domestic consumptions, environment temperature and other effective parameters, turbo-expander inlet gas pressure and mass flow-rate vary with time and consequently the extracted power has time variant specification and causes some power quality issues such as voltage flicker, voltage sag, etc. So, this system is simulated and power quality issues are investigated for a fault occurring at the point of common coupling (PCC). Then, the flicker in electrical waveforms due to change in input pressure or mass flow rate is investigated. Since the power quality problems due to disturbances are considerable, a D-STATCOM is designed and connected at PCC and it is shown that the STATCOM has improved the power quality problems of the system.

Z-Source-Inverter-Based Flexible Distributed Generation System Solution for Grid Power Quality Improvement

Distributed generation (DG) systems are usually connected to the grid using power electronic converters. Power delivered from such DG sources depends on factors like energy availability and load demand. The converters used in power conversion do not operate with their full capacity all the time. The unused or remaining capacity of the converters could be used to provide some ancillary functions like harmonic and unbalance mitigation of the power distribution system. As some of these DG sources have wide operating ranges, they need special power converters for grid interfacing. Being a single-stage buck-boost inverter, recently proposed Z-source inverter (ZSI) is a good candidate for future DG systems. This paper presents a controller design for a ZSI-based DG system to improve power quality of distribution systems. The proposed control method is tested with simulation results obtained using Matlab/Simulink/PLECS and subsequently it is experimentally validated using a laboratory prototype.