scholarly journals Enhance Power Quality of RES with Employing Smart Loads

2019 ◽  
Vol 8 (11) ◽  
pp. 3580-3584
Keyword(s):  
Power Quality ◽  
Synchronous Generator ◽  
Load Management ◽  
Matlab Simulation ◽  
Wind Energy Conversion ◽  
Induction Generators ◽  
Load Demand ◽  
Simulation Results ◽  
Variable Wind

In this paper investigates the improve power quality of RES with adopting smart loads in detail. In wind energy conversion system permanent magnet synchronous generator (PMSG) is employed is employed to get better simulation results over induction generators. Obtained validate MATLAB simulation results considering variable speed variations periodically. Variable wind power production needed in distribution stochastic and periodic power variations to reach load demand. This load management maintenance is highly requires to maintain power quality. This load management is allocated employing smart loads (SLs), capacitor banks and critical loads (Electrical spring).From various case studies, it is found that SLs are effective in improving the voltage profiles of the test feeder

A Novel Method of Detecting Measurement Uncertainty of Voltage Deviation

2013 ◽  
Vol 805-806 ◽  
pp. 688-692
Author(s):  
Xin Fang ◽  
Xue Liang Huang ◽  
Yan Zhu
Keyword(s):  
Measurement Uncertainty ◽  
Power Quality ◽  
National Standards ◽  
Measurement Time ◽  
Time Interval ◽  
Basic Measurement ◽  
Voltage Deviation ◽  
Novel Method ◽  
Simulation Results

Nowadays, there are various devices to detect the power quality of AC grid, where uncertainty of voltage deviation is an important parameter to investigate the power quality. National standards specify several sinusoidal waveforms to detect it, usually implemented into the detecting devices. But these waveforms are not enough and a novel method of detecting measurement uncertainty of voltage deviation is proposed in this paper. A series of detection waveforms are designed using this method. The simulation results verify that the method is available to measure uncertainty of voltage deviation more accurately. Moreover, it can be used to justify whether the basic measurement time interval of voltage deviation meets IEC standard requirements.

General Introduction

2019 ◽  
pp. 1-8
Keyword(s):  
Energy Conversion ◽  
Induction Machine ◽  
General Introduction ◽  
Wind Energy Conversion ◽  
Wind Energy Conversion Systems ◽  
Energy Conversion Systems ◽  
Doubly Fed Induction Machine ◽  
Simulation Results ◽  
Doubly Fed

In this chapter, a brief general introduction focuses on the well-known topologies of wind energy conversion systems (WECS), on proposed controls and generators by the scientific researchers. One part will be devoted to the latest research that has addressed the performance problems of wind systems and their results (in simulation). There will be also some arguments that reflect the main proposed ideas in this eBook, the proposed selections and their applications in simulation. We present the selecting criteria in particular the type of: generator, controls and theirs application in simulation studies. Also, we discuss in a detailed section on the different contributions of eBook that define the improvement of the proposed algorithms in each chapter. Furthermore, the organization and structure of eBook will be as follow; chapter one is devoted on the state of the art of wind systems and their controls, in particular using the doubly fed induction machine (DFIM). The simulation part is provided in two chapters (3 and 4). The limitations and problems encountered during the realization of this eBook are well described in the following section. After solving problems, very satisfactory simulation results have been found which reflect the quality of the scientific contribution including more papers of conferences; Journal papers were published during this eBook.

Simulation of No-Load Voltage of Single Phase Synchronous Generator Based on ANSYS

2011 ◽  
Vol 268-270 ◽  
pp. 231-234
Author(s):  
Jing Yang ◽  
Wei Jun Wang ◽  
Yong Gang Zuo ◽  
Ping Feng ◽  
Long Bo Mao
Keyword(s):  
Magnetic Field ◽  
Power Supply ◽  
Single Phase ◽  
Synchronous Generator ◽  
Simulation Method ◽  
Design Parameters ◽  
Test Results ◽  
Load Voltage ◽  
Simulation Results

The theory and method of analyzing the no-load magnetic field of single phase synchronous generator(SPSG) is presented in this article, and the no-load voltage of SPSG is simulated based on ANSYS program. The no-load voltage simulation results of a SPSG resemble its test results, which prove the simulation method in this article is correct and effective. The simulation results can provide theoretical bases and method for engineers in optimizing the design parameters to improve the power supply quality of SPSG.

scholarly journals The Use of Higher than the Normal Field-forcing Ratio of Synchronous Machines from Energy Storage Systems to Increase the Reliability of Power Supply to Consumers in Centralized and Decentralized Zones

2020 ◽  
Vol 186 ◽  
pp. 01001
Author(s):  
Kamil Bakhteev ◽  
Alexander Fedotov ◽  
Rinat Misbakhov
Keyword(s):  
Energy Storage ◽  
Power System ◽  
Power Quality ◽  
Power Supply ◽  
Storage Systems ◽  
Synchronous Generator ◽  
Synchronous Machines ◽  
Energy Storage Systems ◽  
Current Frequency

The paper presents the results of scientific research, firstly, the effectiveness of the use of energy storage systems as stabilizers of alternating current frequency as a part of gas piston installations in decentralized and centralized (operating in parallel with the power system) and their simultaneous use for excitation forcing of generators during voltage dips is proved, secondly, The efficiency of using increased field-forcing ratio of the synchronous generator of the gas piston installations is proved to improve the power quality of industrial consumers.

State Feedback Current Control of the Three-Phase Grid Connected Power Inverter for the Regenerative Loads

2013 ◽  
Vol 647 ◽  
pp. 935-938
Author(s):  
Marian Gaiceanu ◽  
Adriana Burlibasa ◽  
Cristian Eni ◽  
Mihaita Coman
Keyword(s):  
Steady State ◽  
Power Quality ◽  
State Feedback ◽  
Power Converters ◽  
Power Converter ◽  
Current Control ◽  
Current Loop ◽  
Three Phase ◽  
Simulation Results

Grid-connected power converters are controlled by the current loop, the voltage being delivered by the grid. The proposed state feedback current control has three components: the state feedback, the forcing component to achieve the desired state x1 and the compensating feed forward of the perturbation. Moreover, the control of the power converter, through the external DC-link voltage loop, and internal current loop, assures zero steady state error, and power quality performances. In order to prove the quality of the proposed control, a regenerative load has been used, and the corresponding simulation results are provided.

Micro-Grid Power Quality Management

2015 ◽  
Vol 713-715 ◽  
pp. 1335-1342
Author(s):  
Zhi Qiang Gao ◽  
Hua Yu Chu ◽  
Liang Meng ◽  
Si Qing Sheng ◽  
Zhong Ji Sun ◽  
...  
Keyword(s):  
Power Quality ◽  
Control Method ◽  
Active Power Filter ◽  
Active Power ◽  
Grid Technology ◽  
Power Filter ◽  
Micro Grid ◽  
Simulation Results ◽  
The Impact

As distribute power generation and micro-grid technology develops, more and more researchers attach importance to the problems of power quality in micro-grid, especially the problem of harmonic. This paper describes the impact and harm harmonic has on the power quality of the power grid. It introduces a revised method of managing micro-grid harmonics which uses an active power filter (APF), and the control method of APF is different from the traditional one. It also establishes the simulation model of micro-grid, analyze the simulation results and experiment in actual micro-grid to verify the effectiveness of the proposed method.

Power Conversion Performance and the Suitability of Z-Source Inverter of PMSG Based WECS at Variable Wind Speed Conditions

2014 ◽  
Vol 550 ◽  
pp. 144-156
Author(s):  
A. Radhika ◽  
L. Sivakumar
Keyword(s):  
Wind Speed ◽  
Wind Velocity ◽  
Output Voltage ◽  
Synchronous Generator ◽  
Permanent Magnet Synchronous Generator ◽  
Voltage Level ◽  
Wind Energy Conversion ◽  
Energy Conversion System ◽  
Conversion Performance ◽  
Variable Wind

This paper presents a Permanent Magnet Synchronous Generator (PMSG) based wind energy conversion system with Z-source inverter. The output voltage of a Z-source inverter remains constant so long as the wind speed remains constant. Unfortunately, wind speed keeps changing and hence the output voltage at the inverter outlet. This poses a problem in getting the inverter connected to the grid. Recognizing the fact that the output voltage level at the inverter depends on the shoot through period, the authors propose a varying shoot through period depending on the wind velocity which enables the voltage level remain constant at the inverter output. A neural network is trained and made use of to predict the required shoot through period depending on the current wind velocity.

scholarly journals A Novel Five Phase DSTATCOM for Industrial Loads

2018 ◽  
Vol 7 (1.8) ◽  
pp. 56
Author(s):  
K. P. Prasad Rao ◽  
Srinivasa Varma P
Keyword(s):  
Power Quality ◽  
Induction Machines ◽  
Voltage Sag ◽  
Matlab Simulation ◽  
Quality Problem ◽  
Three Phase ◽  
Simulation Results ◽  
Static Compensator

Now-a-days most of the industries want to earn more profit. It is possible with Five Phase Induction Machines. It attains the more efficiency because of its five phase winding arrangement. These machines are specially design for industries. Making the conversion of five phase supply from three phase supply with the help of transformer scheme which is specially designed. Generally, power quality problem like voltage sag occurs because of sudden changes in loads. In this paper, as a remedy, five phase DSTATCOM (Distribution Static Compensator) with PWM technique is opted to mitigate the voltage sag as power quality problem by injecting the currents in to the system. The MATLAB simulation results represent the effectiveness of five phase DSTATCOM with PWM technique.

scholarly journals Design and Analysis of Controller with Selective Harmonic Compensator for Grid Connected PV System

2021 ◽  
Vol 309 ◽  
pp. 01009
Author(s):  
M. Vasu ◽  
D. Lenine ◽  
J. Surya Kumari ◽  
T. Suresh Kumar
Keyword(s):  
Power Quality ◽  
Pv System ◽  
Pv Systems ◽  
Distributed Power Generation ◽  
Quality Issue ◽  
Pv Inverter ◽  
Current Controller ◽  
Simulation Results ◽  
Power Generation Systems

Harmonics produced by distributed power generation systems (DPGS) is a main power quality issue, particularly due to the number of these systems connected to the grid is always increasing. This means that, it is significant to control the harmonics caused by these inverters to limit their contrary effects on the grid power quality. This paper has proposed a new proportional current controller (P Resonant Current Controller) with selective harmonic compensator for grid connected photovoltaic (PV) systems. The proportional resonant current controller (PRCC) can have a significant effect on the quality of the current supplied to the grid by the PV inverter, and hence it is essential that the controller provides a high-quality sinusoidal output with negligible distortion to avoid generating harmonics. The effectiveness of the proposed framework has been verified using simulation results in MATLAB/Simulink.

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