단일동조 수동고조파필터 설계시의 동조계수(δ) 및 양호도(Q)값 연구

조영식(Young-Sik Cho),차한주(Han-Ju Cha) 대한전기학회 2010 전기학회논문지 P Vol.59 No.1

This paper presents how to decide on tuning factor(δ) and quality factor(Q) values in design of single-tuned passive harmonic filters. Tuning factor(δ) and quality factor(Q) values have to consider before decision on circuit parameters of passive filters. A Study on these two value has not been scarcely performed and only experienced values has been used in passive harmonic filter design by far. As a experienced value, in cases of 5th and 7th filter, tuning factor(δ) is about 0.94 and 0.96 respectively and quality factor(Q) is, in all cases of, 50. If Single-tuned passive harmonic filter will be off-tuned, performance of filter will be decreased steeply and occur to parallel resonance between system reactance and filter capacitance. Therefore During the operation, In order not to off-tuning, Filter must be tuned at former order than actual tuning order. This is the same that total impedance of filter must have a reactive impedance. In this paper, Tuning factor(δ) is decided via example of real system and using the bode-plot and then performance of filters confirmed by filter current absorbtion rate. And Quality factor(Q) decided using the bode plot in example system and then performance of filters confirmed by filter current absorbtion rate also, which makes a calculated filter parameters to satisfy IEEE-519 distortion limits. Finally, Performance of the designed passive harmonic filter using the tuning factor(δ) and quality factor(Q) values, decided in this paper is verified by experiment and shows that 5th, 7th, 9th, 11th and 13th current harmonic distortions are decreased within IEEE-519 distortion limits, respectively.

단일동조 수동고조파필터 설계시의 동조계수() 및 양호도()값 연구

차한주,조영식 대한전기학회 2010 전기학회논문지 P Vol.59 No.1

This paper presents how to decide on tuning factor() and quality factor() values in design of single-tuned passive harmonic filters. Tuning factor() and quality factor() values have to consider before decision on circuit parameters of passive filters. A Study on these two value has not been scarcely performed and only experienced values has been used in passive harmonic filter design by far. As a experienced value, in cases of 5th and 7th filter, tuning factor() is about 0.94 and 0.96 respectively and quality factor() is, in all cases of, 50. If Single-tuned passive harmonic filter will be off-tuned, performance of filter will be decreased steeply and occur to parallel resonance between system reactance and filter capacitance. Therefore During the operation, In order not to off-tuning, Filter must be tuned at former order than actual tuning order. This is the same that total impedance of filter must have a reactive impedance. In this paper, Tuning factor() is decided via example of real system and using the bode-plot and then performance of filters confirmed by filter current absorbtion rate. And Quality factor() decided using the bode plot in example system and then performance of filters confirmed by filter current absorbtion rate also, which makes a calculated filter parameters to satisfy IEEE-519 distortion limits. Finally, Performance of the designed passive harmonic filter using the tuning factor() and quality factor() values, decided in this paper is verified by experiment and shows that 5th, 7th, 9th, 11th and 13th current harmonic distortions are decreased within IEEE-519 distortion limits, respectively.

Single-tuned Passive Harmonic Filter Design Considering Variances of Tuning and Quality Factor

Cho, Young-Sik,Cha, Han-Ju The Korean Institute of Electrical Engineers 2011 The Journal of International Council on Electrical Vol.1 No.1

This paper presents how to select tuning factor and quality factor in designing of a single-tuned passive harmonic filter. Tuning factor and quality factor must be considered before a decision of filter parameters(R, L and C). In literature, the study about these two factors has not been performed and only empirical values have been used in the passive harmonic filter design so far. As an empirical value, in cases of 5th and 7th filter, tuning order has been used $4.8^{th}$ and $6.8^{th}$ respectively and quality factor has been used in a range of 30 and 60; therefore, we will propose how to decide these two factors in this paper. If a single-tuned passive harmonic filter were offtuned, its performance would be deteriorated substantially and resulted in a parallel resonance between grid inductance and filter capacitance. In order to avoid this side effect from off-tuning, the filter must be tuned on some preceded order not on the exact order. In other words, total filter impedance must have reactive impedance on a tuned frequency. In this paper, tuning factor is derived by using a bode-plot based method and then performance of filter is confirmed as a harmonic current absorption rate which harmonic source flows through filter; and quality factor is also derived by using the same method and then the performance is confirmed by the same filter current absorption rate. Finally, the performance of proposed passive harmonic filter design using the tuning factor and quality factor is verified by experiment. Experimental results show that the $5^{th}$, $7^{th}$, $11^{th}$ and $13^{th}$ current harmonic distortions meet IEEE-519 requirement.

Three-Phase Hybrid Shunt Filters for Power Quality Improvement

G. Bhuvaneswari,Manjula G.Nair 전력전자학회 2007 JOURNAL OF POWER ELECTRONICS Vol.7 No.3

Active power filters can be cost-effective for use in practical systems with the insertion of a few passive elements in shunt or series configuration. The resulting hybrid filters can be designed to provide dominant lower order harmonic elimination and reactive power support by the passive elements so that the burden on the active filter counterpart is reduced. In this paper, the rate reduction in the shunt active filter is estimated when it is connected in parallel with suitable passive tuned harmonic filters. The active filtering system is based on an appropriate control scheme. The simulation and the experimental results of the shunt active filter, along with the estimated value of reduction in rating, show that the hybrid shunt filtering system is quite effective in compensating for the harmonics and reactive power, in addition to being cost-effective.

Analysis and Design of LCL Filter with Passive Damping Circuits for Three-phase Grid-connected Inverters

Hyo Min Ahn,Chang-Yeol Oh,Won-Yong Sung,Jung-Hoon Ahn,Byoung Kuk Lee 대한전기학회 2017 Journal of Electrical Engineering & Technology Vol.12 No.1

The analysis and design process of the LCL filter with passive damping circuits for threephase grid-connected inverter are presented based on the generalized model of LCL filter. Several types of the passive damping circuits in previous studies could be compared and analyzed by using the generalized model considering various design criteria of passive damping circuits. According to the analysis in this paper, a reasonable configuration of passive damping circuits for three-phase gridconnected inverters is proposed. The validity of the proposed design process is verified by informative simulation and experimental results.

릴레이 구동회로 및 수동필터를 이용한 단상 전원의 부하 적응형 고조파 전류 제거 기법

朴鍾演(Jong-Yeon Park),李厚燦(Hu-Chan Lee),李奉振(Bong-Jin Lee),崔源豪(Won-Ho Choi) 대한전기학회 2006 전기학회논문지 B Vol.55 No.6

Because of the high cost for the active power filter, passive filters have been widly used to eliminate harmonic currents of nonlinear load and can also improve the power factor. They are not often optimal filters because the passive filters are designed under the fixed load conditions. In this paper we proposed the method which only the necessary harmonic filters are operated by detecting the various harmonic current components. We presents the new control method of passive filter selection type with the relay control circuit which is consist of analog GIC, comparater, flip-flop and etc. By the experimental results using the proposed system for the rectifier load, we concluded that the researched method is cost effective and the performance is better than the passive filter.

Unscented Kalman Filter를 이용한 원격 RF 센서 시스템 구현

金璟燁(Kyung-Yup Kim),李浚柝(John-Tark Lee) 대한전기학회 2008 전기학회논문지 Vol.57 No.10

In this paper, Passive Telemerty RF Sensor System using Unscented Kalman Filter algorithm (UKF) is proposed. General Passive Telemerty RF Sensor System means that it should be "wireless", "implantable" and "batterless". Conventional Passive Telemerty RF Sensor System adopts Integrated Circuit type, but there are defects like complexity of structure and limit of large power consumption in some cases. In order to overcome these kinds of faults, Passive Telemetry RF Sensor System based on inductive coupling principle is proposed in this paper. Because passive components R, L, C have stray parameters in the range of high frequency such as about 200[㎑] used in this paper, Passive Telemetry RF Sensor System considering stray parameters has to be derived for accurate model identification. Proposed Passive Telemetry RF Sensor System is simple because it consists of R, L and C and measures the change of environment like pressure and humidity in the type of capacitive value. This system adopted UKF algorithm for estimation of this capacitive parameter included in nonlinear system like Passive Telemetry RF Sensor System. For the purpose of obtaining learning data pairs for UKF Algorithm, Phase Difference Detector and Amplitude Detector are proposed respectively which make it possible to get amplitude and phase between input and output voltage. Finally, it is verified that capacitive parameter of proposed Passive Telemetry RF Sensor System using UKF algorithm can be estimated in noisy environment efficiently.

Analysis and Design of LCL Filter with Passive Damping Circuits for Three-Phase Grid-Connected Inverters

Hyo-Min Ahn,Chang-Yeol Oh,Won-Yong Sung,Jung-Hoon Ahn,Byoung-Kuk Lee 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6

In this paper, a design method of LCL and a generalized model with various types of passive damping circuits for the three-phase grid-connected inverter are proposed. Based on the generalized model, theoretical analysis is carried out to examine the performance of the designed LCL filter. The validity of the proposed filter model is verified by simulation and experimental results.

An Optimal Method to Design a Trap-CL Filter for a PV AC-Module Based on Flyback Inverter

Yong-Su Noh,Bong-Yeon Choi,Soon-Ryung Lee,Ju-Kyoung Eom,Chung-Yuen Won IEEE 2016 IEEE transactions on industry applications Vol.52 No.2

<P>The power factor and total harmonic distortion (THD) are important considerations when designing an output filter. In the case of the photovoltaic (PV) ac-module, the size and weight also have to be taken into consideration. This paper proposes an output filter to reduce size and weight, and provides the optimal design method for a PV ac-module. The proposed output filter consists mainly of a conventional CL filter with a trap filter. The trap filter is used to eliminate the harmonic at the switching frequency that contains most of the harmonics. Therefore, total inductance and the size of the filter can be reduced although the output filter components are increased. This paper presents analysis of the proposed filter characteristics in detail. Also, an optimal design method reducing the size of the output filter components including the damping resistor is proposed. The proposed methods are verified on the experimental prototype rated at 320 W with an ac-module based on the interleaved flyback inverter. The total filter inductance and volume are, respectively, reduced to 9.54% and 26.62% with the same performance.</P>

역률보상 기반 고조파 수동필터 제어기의 개발

오훈,유재근 국제차세대융합기술학회 2019 차세대융합기술학회논문지 Vol.3 No.1

고조파에 의한 전기설비 사고와 경제적 손실은 증가하고 있다. 고조파 수동 필터는 고조파를 억제하는데 효과적이고 경제적이지만, 많은 현장 엔지니어들은 고조파 증폭과 병렬 공진 발생 등의 문제점으로 인해 계통에 수동 고조파 필터를 설치하는 것을 꺼려한다. 본 논문에서는 이러한 문제점을 해결하기 위해 역률 보상을 기반으로 하는 고 조파 수동필터 제어기를 개발하였다. 개발된 시스템의 전압 및 전류 측정 정확도는 표준 전력 발생장비인 FLUKE 61000A를 이용하여 시험하였으며, 측정 정확도는 0.5% 이하로 나타났다. Accidents of electric equipment and economical loss by harmonics show a rising tendency. A passive filter is economic and efficient in suppressing harmonics. But many engineers and designers are reluctant to install a passive filter to defect harmonics at their power system because of problems such as harmonic amplification and the probability of generating series or parallel resonance with the power system. This work have developed harmonic passive filter controller based on power factor correction that passive filters. The volated and current measurement accuracy of the developed system is tested by using electrical power standard devices FLUKE 61000A. The test results showed that accuracy of the developed system is less than 0.5 %