scholarly journals Optimal Hybrid Filtering Strategy Using Adaptive Genetic-Fuzzy Logic Control for Harmonics Reduction in a Standalone Micro Hydroelectric Power Plant Coordinated with a PV System

2021 ◽  
Vol 5 (4) ◽  
pp. 56-62
Author(s):  
Adel Elgammal ◽  
Curtis Boodoo
Keyword(s):  
Fundamental Frequency ◽  
Eddy Current ◽  
Active Power Filter ◽  
Eddy Current Loss ◽  
Active Power ◽  
Active Filter ◽  
Power Filter ◽  
Harmonic Currents ◽  
Hybrid Filtering ◽  
Harmonic Components

Micro Hydro Power Plants are a type of power production that uses the force of river flows or waterfalls to generate electricity. The generator generates current waves and harmonic voltage, which are distorted wave disturbances that cause fundamental frequency multiplication. The major goal of this work is to design a reliable, efficient, and innovative harmonic mitigation approach for a stand-alone micro hydroelectric system that is coordinated with a photovoltaic renewable energy system utilising an active power filter. We may pick the active filter highest harmonic to be suppressed using the magnitude information supplied for each harmonic component. A hybrid filtering approach to remove harmonics and a novel MOGA optimization technique are part of the suggested harmonics reduction solution. The goal of this article is to determine the optimum filter for decreasing harmonics in an induction generator. As the harmonic damper, two filters were chosen: a passive filter and an active power filter. The suggested MOGA control method is compared to GA and evaluated on simulated data. In tracking harmonic components and fundamental frequency, the suggested MOGA control system provides high convergence speed and accuracy. It's extremely adaptable, and it can predict changes in the phase angle, amplitude, and fundamental frequency of harmonic components. When compared to the Genetic Algorithm method, it performs better. Simulation results using the SIMULINK/MATLAB simulation tool are delivered to evaluate the efficacy of the suggested active filter system. The impact of harmonic currents on the magnetic flux density is investigated using the rated condition as a reference. It has been established that the time harmonic is a significant element influencing generator performance. At the same time, the impacts of harmonic currents on the generator's eddy current loss, average torque, and torque ripple are investigated, as well as the mechanism of eddy current loss fluctuation.

A Novel Three-Phase Current Source Active Power Filter

2014 ◽  
Vol 667 ◽  
pp. 383-389
Author(s):  
Yu Xiong ◽  
Yu Ling Li ◽  
Yan Ping Guo ◽  
Bo Yang
Keyword(s):  
High Power ◽  
Current Source ◽  
Active Power Filter ◽  
Active Power ◽  
Switching Frequency ◽  
Current Harmonic ◽  
Power Filter ◽  
High Switching Frequency ◽  
Harmonic Components ◽  
And Control

A novel topology for efficient utilization of parallel inverters as current source active power filter (APF) for high-power applications is presented and analyzed. The proposed technique operates the master inverter with high-power low-switching-frequency devices to compensate the low-order large-amplitude current harmonic components and the slave inverter with low-power high-switching-frequency devices to compensate the high-order small-amplitude current harmonic components. This paper discusses the operating principle, main circuit and control system design. Simulation and experimental results are provided to demonstrate the viability of the scheme.

scholarly journals A PLL Scheme for Synchronization with Grid Voltage Phasor in Active Power Filter Systems

2010 ◽  
Vol 27 (1) ◽  
pp. 134-137 ◽  
Author(s):  
Oskars Krievs ◽  
Ingars Steiks ◽  
Leonids Ribickis
Keyword(s):  
Active Power Filter ◽  
Active Power ◽  
Active Filter ◽  
Positive Sequence ◽  
Voltage Source ◽  
Grid Voltage ◽  
Active Power Filters ◽  
Voltage Source Inverters ◽  
Power Filter ◽  
Power Filters

A PLL Scheme for Synchronization with Grid Voltage Phasor in Active Power Filter SystemsVoltage source inverters connected to the grid in applications such as active power filters require synchronization with the grid voltage. Since in practice the grid voltage can be unbalanced and distorted, but the operation of the whole active filter control system is strongly dependant on precise estimation of grid voltage phase, the fundamental positive sequence phasor of the grid voltage has to be extracted. In this paper a system for smooth estimation of the position of the voltage phasor at the point of common coupling of a parallel active filter system is presented using a sinusoidal signal integrator and a simple software PLL. The performance of the proposed system is verified by simulation and experimental results. The proposed PLL scheme can also be used in other vector oriented control systems.

Study on Light HVDC Converter and Harmonic Suppression of the Active Filter

2014 ◽  
Vol 977 ◽  
pp. 391-394
Author(s):  
Si Qi Lv
Keyword(s):  
Active Power Filter ◽  
Vital Role ◽  
Active Power ◽  
Active Filter ◽  
Main Function ◽  
Harmonic Suppression ◽  
Key Technology ◽  
Power Filter ◽  
Hvdc Light ◽  
Great Progress

The key equipment of Light HVDC Technology is the converter and the filter. The main function of the converter is AC / DC conversion, which plays a vital role in converter station. The filter is also an important tool for harmonic suppression. Therefore, in this paper, the HVDC converter and the harmonic suppression are studied. Our paper discussed the advanced converter VSC which is currently being put into operation, its key technology--the MMC topology and the connection mode of VSC. Meanwhile, the production, effect and suppression of the harmonic are analyzed. Compared active power filter to the passive filter, finally, we chose the active filter as the research object. Successful experience of the HVDC Light project which has been put into operation or will be put into use showed that, the technology is in great progress and will be widely used.

Research on New Hybrid Active Power Filter

2011 ◽  
Vol 201-203 ◽  
pp. 1512-1516
Author(s):  
Jing Jie Peng ◽  
Xiao Ping Fan ◽  
Gang Li
Keyword(s):  
High Voltage ◽  
Reactive Power ◽  
Active Power Filter ◽  
Active Power ◽  
Direct Control ◽  
Pass Filter ◽  
Power Filter ◽  
Hybrid Active Power Filter ◽  
Harmonic Currents ◽  
High Voltage System

A new hybrid active power filter (NHAPF) and its corresponding controlling method are proposed in the paper, which can be applied in high voltage system. The topology structure of NHAPF is given and its compensating principle is described. The corresponding controlling method is a power direct control, which need not the lower pass filter and improve the performance of detecting precision and velocity. Simulating results show that the feasibility and validity of the compensated system. Harmonic currents and reactive power are compensated well.

DYNAMIC PERFORMANCES OF THE SHUNT ACTIVE POWER FILTER CONTROL SYSTEM

2021 ◽  
Vol 4 (1) ◽  
pp. 47-56
Author(s):  
Sergiy Mykchailovych Peresada ◽  
Sergiy Mykolaiovych Kovbasa ◽  
Yuriy Mykchailovych Zaichenko
Keyword(s):  
Fourier Transform ◽  
Control System ◽  
Fast Fourier Transform ◽  
Active Power Filter ◽  
Active Power ◽  
Active Filter ◽  
Adaptive Observer ◽  
Shunt Active Power Filter ◽  
Power Filter ◽  
Instantaneous Power

Harmonic pollution of the electrical mains is well known and well-studied phenomena. Active power filter being a powerful tool to meet the requirements of regulatory documents regulating the electricity quality. Despite this fact, practical implementation of the active power filter is still connected with significant difficulties. In particular, existing systems typically use fast Fourier transform methods or instantaneous power theory to estimate the harmonic composition of the mains current. However, the use of fast Fourier transform requires high computing power of the control system, and the implementation of the theory of instantaneous power significantly increases the requirements for the power part of the active filter. The application of another approach - selective compensation of harmonics, makes it possible to reduce computational requirements and significantly simplify the technical implementation of the active filter and at the same time to achieve an acceptable level of distortion compensation. In this paper, the shunt active power filter control system is designed and investigated. Proposed control system consist of selective harmonics observer, feedback-linearizingcurrent controller, dc-link controller and mains voltage observer. Harmonics observer is tuned according to simplified approach, provides selective estimation of the load current harmonics and produce the compensation current reference for the current controller. Nonlinear dc-link voltage controller guarantees decoupled from current compensation process asymptotic regulation of the average dc-link voltage. Mains voltage vector adaptive observer provides magnitude, angular position and frequency estimation. Proposed control system is implemented on digital signal processor TMS320F28335 end verified experimentally. Results of experimental investigations together with results of simulations confirm effectiveness of proposed solution. Developed control system can be used for shunt active filters implementation.

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