Optimized current control and dynamic coordination strategy for large-capacity harmonic compensation system

2016 ◽  
Author(s):  
Kangli Liu ◽  
Wu Cao ◽  
Jianfeng Zhao ◽  
Jun You ◽  
Quan Gu
Keyword(s):  
Compensation System ◽  
Current Control ◽  
Large Capacity ◽  
Harmonic Compensation ◽  
Coordination Strategy ◽  
Dynamic Coordination

scholarly journals Cooperation of Voltage Controlled Active Power Filter with Grid-Connected DGs in Microgrid

2018 ◽  
Vol 11 (1) ◽  
pp. 154 ◽  
Author(s):  
Hafiz Munir ◽  
Jianxiao Zou ◽  
Chuan Xie ◽  
Josep Guerrero
Keyword(s):  
Power Distribution ◽  
Distribution Systems ◽  
Active Power Filter ◽  
Active Power ◽  
Current Control ◽  
Control Loop ◽  
Renewable Energy Resources ◽  
Harmonic Compensation ◽  
Power Filter ◽  
Voltage Feedback

Due to the excessive use of nonlinear loads and inverter interfaced distributed generators, harmonic issues have been regarded as a major concern in power distribution systems. Therefore, harmonic compensation in microgrids is a subject of current interest. Consequently, a novel direct harmonic voltage-controlled mode (VCM) active power filter (APF) is proposed to mitigate the harmonics in a cooperative manner and provide a better harmonic compensation performance of less than 5%. Due to the dispersive characteristics of renewable energy resources, voltage feedback based on a harmonic compensation control loop is implemented for the first time. This system can be smoothly combined with the current control loop. Our method proposes a better performance while mitigating the harmonics in comparison with conventional resistive active power filters (R-APF). Based on direct voltage detection at the point of common coupling (PCC), the proposed VCM-APF can therefore be seamlessly incorporated with multiple grid-connected generators (DGs) to enhance their harmonic compensation capabilities. The advantage of this scheme is that it avoids the need for designing and tuning the resistance, which was required in earlier conventional control schemes of R-APF for voltage unbalance compensation. Additionally, our scheme does not require the grid and load current measurements since these can be carried out at the PCC voltage, which further reduces the implementation cost of the system. Furthermore, the simulation results show the significance of proposed method.

scholarly journals Power Quality Improvement Wind Energy System Using Cascaded Multilevel Inverter

2013 ◽  
Vol 2 (1) ◽  
pp. 35
Author(s):  
J.S. Sathiyanarayanan ◽  
A. S. Kumar
Keyword(s):  
Wind Energy ◽  
Energy System ◽  
Current Control ◽  
Control Mode ◽  
Voltage Source ◽  
Harmonic Compensation ◽  
Load Compensation ◽  
Power Injection ◽  
Power Quality Improvement ◽  
Cascaded Multilevel Inverter

In this paper, a wind energy conversion system based on a cascaded H-bridgemultilevel inverter (CHBMLI) topology has been proposed to be used for the grid interface of largesplit winding alternators (SWAs). A new method has been suggested for the generation of referencecurrents for the voltage source inverter (VSI) depending upon the available wind power. TheCHBMLI has been used as a VSI and operated in a current control mode order to achieve theobjectives of real power injection and load compensation (power factor correction, load balancing,and harmonic compensation) based on the proposed reference generation scheme. In the fieldexcitation control of SWA provides a single means vary the dc link voltages of all the CHBssimultaneously and proportionately.

Based on Delay Compensation System for Shunt Active Power Filter Research

2013 ◽  
Vol 860-863 ◽  
pp. 2050-2053
Author(s):  
Xin Yao ◽  
Zai Lin Yao ◽  
Xin Ying Teng
Keyword(s):  
Compensation System ◽  
Matlab Simulation ◽  
Harmonic Detection ◽  
Delay Compensation ◽  
Harmonic Current ◽  
Shunt Active Power Filter ◽  
Harmonic Compensation ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass

APF harmonic detection is the study of the most important parts of the core , quickly and accurately detect the harmonic current is able to quickly output harmonic compensation circuit current of the premise. Delay compensation system is based on the increase in the method specified time compensation angle , which can accurately detect the harmonic current at the same time , the low-pass filter to minimize the time delay generated by MATLAB simulation, the use of delay compensation system active Filter harmonic Detection and Compensation excellent performance, while ensuring high precision detection and compensation while ensuring at the same time , and fully complete filter real-time functionality .

Comprehensive Compensation System Based on CS-APF and SVC

2014 ◽  
Vol 635-637 ◽  
pp. 1418-1421
Author(s):  
Yu Qing Lin ◽  
Mao Fa Gong ◽  
Hui Ting Ge ◽  
Bing Qian Liu ◽  
Ning Xia Yang
Keyword(s):  
Reactive Power ◽  
Control Method ◽  
Feedforward Control ◽  
Compensation System ◽  
Harmonic Compensation ◽  
Harmonic Currents ◽  
Thyristor Controlled Reactor ◽  
Simulation Results ◽  
Var Compensation

A unified control method of comprehensive compensation system based on CS- APF and SVC is introduced in this paper. SVC is composed of thyristor controlled reactor (TCR) and fixed capacitor (FC). For the CS- APF control, a feedforward control for harmonic compensation of SVC and load is applied. The CS- APF is enabled to optimize the var compensation performance of SVC. Finally, the simulation results show that the system can effectively compensate reactive power and eliminate harmonic currents.

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