• 제목/요약/키워드: Active power regulation

검색결과 105건 처리시간 0.024초

Implementation of Grid Connection of DFIG for Wind Power Generation System

  • Abo-Khalil, Ahmed G.;Lee, Dong-Choon
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2006년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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    • pp.143-145
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    • 2006
  • This paper presents an overall control algorithm for a grid-connected wind-power generation system using a DFIG(doubly-fed induction generator) fed by back-to-back PWM converters. The control of DFIG is based on a stator-flux oriented vector control. The system enables not only fast and smooth synchronization but also high performance regulation of active and reactive power. Experimental results shows The feasibility of the control algorithm.

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불평형 전원전압을 보상하는 3상3선식 직렬형 능동전력필터에 관한 연구 (A Study on Series Active Power Filter Compensating Unbalanced Source Voltage in 3phase-3wire system)

  • 오재훈;한윤석;김영석;원충연;최세완
    • 전력전자학회논문지
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    • 제6권5호
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    • pp.386-393
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    • 2001
  • 본 논문에서는 3상 3선식 전력시스템에서 전류 고조파와 전원 전압 불평형을 보상하는 직렬형 능동전력필터에 관하여 연구하였다. 직렬형 능동전력필터는 병렬형 수동필터와 병용으로 구성되어져 수동필터의 고조파 보상 능력을 향상시켜주며, 전원측의 전류 고조파를 더욱 저감시키고, 전원 전압의 불평형을 보상하여 부하측에 평형한 전원조건이 형성되도록 보상해 준다. 제안하는 제어 알고리즘은 전류 고조파 보상을 위한 방법과 전원 전압 불평형을 보상하는 방법으로 나누어지며 최종적인 보상 전압은 계산되어진 두 가지 보상 전압의 합의 형태가 되겠다. 전류 고조파 보상을 위한 보상 지령 전압은 정의되어진 성능함수에 의해 계산되어지며, 전원 전압 불평형 보상을 위한 보상 지령 전압은 동기 좌표를 이용하여 계산되어진다. 실험을 통하여 제안하는 알고리즘의 우수성을 입증하였다.

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Dual Mode Phase-Shifted ZVS-PWM Series Load Resonant High-Frequency Inverter for Induction Heating Super Heated Steamer

  • Hisayuki Sugimura;Hidekazu Muraoka;Tarek Ahmed;Srawouth Chandhaket;Eiji Hiraki;Mutsuo Nakaoka;Lee, Hyun-Woo
    • Journal of Power Electronics
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    • 제4권3호
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    • pp.138-151
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    • 2004
  • In this paper, a constant frequency phase shifting PWM-controlled voltage source full bridge-type series load resonant high-frequency inverter using the $4^{th}$ generation IGBT power modules is presented for innovative consumer electromagnetic induction heating applications, such as a hot water producer, steamer and super heated steamer. The bridge arm side link passive capacitive snubbers in parallel with each power semiconductor device and AC load side linked active edge inductive snubber-assisted series load resonant tank soft switching inverter with a constant frequency phase shifted PWM control scheme is evaluated and discussed on the basis of the simulation and experimental results. It is proved from a practical point of view that the series load resonant and edge resonant hybrid high-frequency inverter topology, what is called, DE class type, including the variable-power variable-frequency regulation function can expand zero voltage soft switching commutation area even under low output power setting ranges, which is more suitable and acceptable for newly developed induction heated dual pack fluid heaters. Furthermore, even the lower output power regulation mode of this high-frequency load resonant tank inverter circuit is verified so that this inverter can achieve ZVS with the aid of the single auxiliary inductor snubber.

A Novel Induction Heating Type Super Heated Vapor Steamer using Dual Mode Phase Shifted PWM Soft Switching High Frequency Inverter

  • Sugimura, Hisayuki;Eid, Ahmad;Lee, Hyun-Woo;Nakaoka, Mutsuo
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2005년도 전력전자학술대회 논문집
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    • pp.774-777
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    • 2005
  • In this paper, a constant frequency phase shifting PWM controlled voltage source full bridge-type series load resonant high-frequency inverter using the IGBT power modules is presented for innovative consumer electromagnetic induction heating applications such as a hot water producer, steamer and super heated steamer. The full bridge arm side link passive quasi-resonant capacitor snubbers in parallel with the each power semiconductor device and high frequency AC load side linked active edge inductive snubber-assisted series load resonant tank soft switching inverter with a constant frequency phase shifted PWM control scheme is discussed and evaluated on the basis of the simulation and experimental results. It is proved from a practical point of view that the series load resonant and edge resonant hybrid high-frequency soft switching PWM inverter topology, what is called class DE type. including the variable-power variable-frequency(VPVF) regulation function can expand zero voltage soft switching commutation range even under low output power setting ranges, which is more suitable and acceptable for induction heated dual packs fluid heater developed newly for consumer power utilizations. Furthermore, even in the lower output power regulation mode of this high-frequency load resonant tank high frequency inverter circuit it is verified that this inverter can achieve ZVS with the aid of the single auxiliary inductor snubber.

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능동배기소음 제어기 개발에 관한 연구 (A Study on the Development of Active Exhaust Noise Controller)

  • 김홍섭;손동구;박수홍;오재응
    • 한국자동차공학회논문집
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    • 제5권1호
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    • pp.79-86
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    • 1997
  • The need for an active exhaust moise controller has been growing as an reinforcement of exhaust noise regulation, high power output and improvement of average fuel economy. In this study, for development of this active exhaust noise controller, the implementation of a composition of realtime control algorithm for active exhaust noise control and the construction of simulator for realtime control algorithm for active exhaust noise control has been investigated. Also, in order to implement active exhaust noise control with this simulator, the feasibility model for control of vehicle exhaust noise control is suggested.

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Comparison Analysis of Resonant Controllers for Current Regulation of Selective Active Power Filter with Mixed Current Reference

  • Yi, Hao;Zhuo, Fang;Li, Yu;Zhang, Yanjun;Zhan, Wenda
    • Journal of Power Electronics
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    • 제13권5호
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    • pp.861-876
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    • 2013
  • Instead of extracting every selected harmonic component, the current reference of selective active power filter (APF) can be also obtained by filtering out the fundamental component from distorted load current for computation efficiency. This type of mixed current reference contains kinds of harmonic components and easily involves noises. In this condition, selective harmonic compensation must be realized by the current controller. With regard that selectivity is the most significant feature of controller, this paper presents specific comparison analysis between two types of resonant controllers: proportional-resonant (PR) controller and vector-resonant (VR) controller. The comparison analysis covers the relations, performances, and stability of both controllers. Analysis results conclude that the poorer selectivity of the PR controller could be relatively improved, but limitations from system stability make the improvement hardly realized. By contrast, the VR controller exhibits excellent selectivity and is more suitable for selective APF with mixed current reference. Experimental results from laboratory prototype validate the reasonability of analysis. And the features of each resonant controller are concluded.

불평형 전압 발생 시 유효전력 조절을 통한 전압형 HVDC의 DC전압 제어 방안 (Control Scheme Using Active Power Regulation for DC Voltage of VSC HVDC Under Unbalanced Voltage)

  • 박상인;허재선;문원식;김두희;김재철
    • 전기학회논문지
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    • 제64권2호
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    • pp.232-239
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    • 2015
  • Faced with unbalanced grid operation mode, the high voltage direct current (HVDC) based on voltage source converter (VSC) can be properly controlled by a dual current control scheme. For the modular multilevel converter (MMC) controlling the AC side current is able to limit the arm current which flows along the IGBT of submodule (SM) to rated current. However the limitation of the arm current results in leaving the control range of active power at MMC confined to below the rated capacity. As a result, limiting the arm current causes the problem that the DC side voltage of the HVDC can not be controlled to the reference value since MMC HVDC adjusts the DC side voltage through the active power. In this paper, we propose the algorithm adjusting the active powers of both MMCs to resolve the problem. The back-to-back MMC HVDC applying the algorithm is modeled by PSCAD/EMTDC to verify the algorithm.

Real-Time Implementation of Shunt Active Filter P-Q Control Strategy for Mitigation of Harmonics with Different Fuzzy M.F.s

  • Mikkili, Suresh;Panda, Anup Kumar
    • Journal of Power Electronics
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    • 제12권5호
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    • pp.821-829
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    • 2012
  • This research article presents a novel approach based on an instantaneous active and reactive power component (p-q) theory for generating reference currents for shunt active filter (SHAF). Three-phase reference current waveforms generated by proposed scheme are tracked by the three-phase voltage source converter in a hysteresis band control scheme. The performance of the SHAF using the p-q control strategy has been evaluated under various source conditions. The performance of the proposed control strategy has been evaluated in terms of harmonic mitigation and DC link voltage regulation. In order to maintain DC link voltage constant and to generate the compensating reference currents, we have developed Fuzzy logic controller with different (Trapezoidal, Triangular and Gaussian) fuzzy M.F.s. The proposed SHAF with different fuzzy M.F.s is able to eliminate the uncertainty in the system and SHAF gains outstanding compensation abilities. The detailed simulation results using MATLAB/SIMULINK software are presented to support the feasibility of proposed control strategy. To validate the proposed approach, the system is also implemented on a real time digital simulator and adequate results are reported for its verifications.

Solid State Transformer를 위한 양방향 Dual Active Bridge DC-DC 컨버터의 설계 기법 (Practical Design Methodology of Dual Active Bridge Converter as Isolated Bi-directional DC-DC Converter for Solid State Transformer)

  • 최현준;이원빈;정지훈
    • 전력전자학회논문지
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    • 제22권2호
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    • pp.102-108
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    • 2017
  • Proper design guides are proposed for a practical dual-active bridge (DAB) converter based on the mathematical model on the steady state. The DAB converter is popular in bidirectional application due to its zero-voltage capability and easy bidirectional operation for seamless control, high efficiency, and performance. Some design considerations are taken to overcome the limitation of the DAB converter. The practical design methodology of power stage is discussed to minimize the conduction and switching losses of the DAB converter. Small-signal model and frequency response are derived and analyzed based on the generalized average method, which considers equivalent series resistance, to improve the dynamics, stability, and reliability with voltage regulation of the practical DAB converter. The design of closed-loop control is discussed by the derived small-signal model to obtain the pertinent gain and phase margin in steady-state operation. Experimental results of a 3.3 kW prototype of DAB converter demonstrate the validity and effectiveness of the proposed methods.

Novel Multiple Output Converter using Quasi Load

  • 최규식;현병철;이승운;조보형
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2010년도 하계학술대회 논문집
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    • pp.125-126
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    • 2010
  • In this paper, a novel multiple output converter using quasi load is proposed. Conventional multiple output converters using multi-winding transformer has poor output voltage regulations. To solve this problem, there are many proposals like post regulation method, weighted control method, and etc. However, the post regulation method regulates output voltage tightly but its conduction loss and cost are increased. And the weighted control can achieve high efficiency and low cost but its regulation is not enough. To solve these problems, this paper proposes a novel multiple output converter using quasi load. The proposed method uses a quasi load which acts like an active dummy load for tight regulation but there is rarely increase of loss and cost. The proposed method is verified by hardware test by two output(24V and 15V) flyback type converter.

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