• Title/Summary/Keyword: Static inverter

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Development of Static Inverter for European Electric Railway (유럽형 전동차용 보조전원장치 개발)

  • Kim Sangkyun;Kim Ki-Hoon;Lee Hyun-Seok;Lee Kyung-Bok;Choi Jong-Mook
    • Proceedings of the KSR Conference
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    • 2003.10c
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    • pp.634-639
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    • 2003
  • The static inverter is mainly used to provide with the electric power of various loads in the train. In the recent european projects, the specification of static inverter become harder, and many additional service function is expected. It takes long time and high cost to develope a static inverter with these high performances and additional function. But, these are became general demands for static inverter in the many projects from now on. The APSE(Auxiliary Power Supply Equipment) is a static inverter of high performance to satisfy the severe specification and various service function following these tendency for Athens project In this paper, the specification of APSE and various service functions are introduced to look about current tendencies of static inverter.

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Control System Design for Self-Commutated Static Var Compensator (전압원인버터방식 송전용 무효전력보상기의 제어시스템 설계)

  • 한병문
    • Proceedings of the KIPE Conference
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    • 1996.06a
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    • pp.89-92
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    • 1996
  • This paper describes a detailed simulation model of the static condenser (STATCON) to analyze the dynamic interaction with the ac transmission line. The static condenser was represented by a 12-pulse voltage-source inverter sharing an energy storage dc capacitor. The voltage-source inverter consists of two 6-pulse bridges modeled with ideal gate-turn-off switches. The control system for the static condenser was designed through a mathematical model deduced from the equivalent circuit. Simulation results show that the conceived model is very effective to analyze the dynamic interaction between the static condenser and the ac transmission system.

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Advanced Features of Static Inverter and Their Influence on Rail Infrastructure and Vehicle Maintenance

  • Bachmann, G.;Wimmer, D.
    • International Journal of Railway
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    • v.1 no.3
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    • pp.94-98
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    • 2008
  • Static inverters are essential devices onboard of rolling stock. State-of-the-art static inverters have an impact on both rail infrastructure and vehicle maintenance due to their new topology with new features. The paper describes two important aspects as examples of new features available in state-of-the-art static inverters: active input current control and the effects on the rail infrastructure as well as the detection of the state of charge and the state of health of batteries to simplify vehicle maintenance.

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Static Equivalent Model of Inverter-based Distributed Energy Resource for Fault Analysis of Power Distribution Grid

  • Kim, Dong-Eok;Cho, Namhun;Yang, Seung-Kwon
    • KEPCO Journal on Electric Power and Energy
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    • v.2 no.4
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    • pp.569-575
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    • 2016
  • In this paper, we propose a method to develop a static equivalent model of an inverter-based distributed energy resource (DER), where the model is used for a steady-state fault analysis of a power grid. First, we introduce the characteristics of an inverter-based DER as well as its general configuration. Then, we derive the equivalent model of the DER on the basis of the characteristics. Last, the performance of the proposed method is proven by the results of computer simulations.

STATIC AND DYNAMIC BEHAVIOR OF HIGH-CURRENT RECTIFIER DIODES IN RESISTANCE WELDING INVERTER POWER SOURCES

  • Mecke, Hubert;Doebbelin, Reinhard;Fischer, Wolfgang
    • Proceedings of the KIPE Conference
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    • 1998.10a
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    • pp.1003-1007
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    • 1998
  • In recent years inverter power sources are more and more used for resistance welding processes. In this paper some results of investigation into the static and dynamic behavior of high-current rectifier diodes used in these inverter power sources will be discussed. By means of digital simulation, losses and efficiency have been determined depending on the power semiconductor parameters.

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Static-Error-Free Digital PID Voltage Regulator for UPS Inverter (정상상태오차 없는 UPS 인버터용 디지털 PID 전압 제어기)

  • Kim, Byoung-Jin;Choi, Jae-Ho
    • Proceedings of the KIEE Conference
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    • 2000.07b
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    • pp.1227-1229
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    • 2000
  • The output voltage of UPS must not vary according to the load variation But the output voltage varies due to the load variation when a PI voltage regulator is used which has inherently a static state error. This paper presents a static-error-free digital PID voltage regulator for an UPS inverter to overcome additionally the voltage unbalance problem in three Phase system as well as the above problem.

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Analysis of HVDC Inverter and Application of Objective Functions for the Optimal Filter Design (직류송전 인버터의 필터 최적설계를 위한 해석 및 목적함수의 선정)

  • 오성철;정교범
    • The Transactions of the Korean Institute of Power Electronics
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    • v.6 no.1
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    • pp.82-89
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    • 2001
  • This paper proposes several methods to analyze dynamic and static characteristics of HVDC inverter system. The characteristic analysis is essential of the controller and filter design of the HVDC inverter system. Dynamic characteristic can be analyzed with EMTP simulation and static characteristic can be obtained by solving newly proposed load flow equation which includes the filter and load characteristic. New simple per-phase-equivalent circuit is also proposed. In this circuit, HVDC inverter is considered as a current source depending on the on-off status of switch. Dynamic and static characteristic can be analyzed by the proposed per-phase-equivalent circuit. For the optimal filter design, various performance criteria are proposed. The performance index, based on the per-phase-equivalent circuit, is calculated. Voltage harmonics and filter power loss are selected as criteria. Optimization procedure is explained to find optimal passive filter parameters.

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A New Scheme for Maintaining Balanced DC Voltages in Static Var Compensator(SVC) Using Cascade Multilevel Inverter

  • Min, Wan-Ki;Min, Joon-Ki;Choi, Jae-Ho
    • Proceedings of the KIPE Conference
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    • 2001.10a
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    • pp.561-565
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    • 2001
  • This paper proposes a new switching scheme of a static var compensator(SVC) with cascade multilevel inverter which employs H-bridge inverter(HBI). To improve the un­balanced problem of the DC capacitor voltages, the rotated switching scheme of fundamental frequency is newly used. The optimized fundamental switching pattern with low switching frequency is adapted to be suitable for high application. The selective harmonic elimination method(SHEM) allows to keep the total harmonic distortion(THD) low in the output voltage of multilevel inverter. The SVC system is modeled using the d-q transform which calculates the instantaneous reactive power. This model is used to design a controller and analyze the SVC system. Simulated and experimental results are also presented and discussed to validate the proposed schemes.

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A New Control Scheme for Maintaining Balanced DC Voltages in Static Var Compensator(SVC) Using Cascade Multilevel Inverter (직렬형 멀티레벨 인버터를 사용한 무효전력보상장치의 직류전압평형을 위한 새로운 제어기법)

  • Min, Wan-Ki;Min, Joon-Ki;Choi, Jae-Ho
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.54 no.4
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    • pp.179-184
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    • 2005
  • This paper examines the application of high voltage static var compensator(SVC) with cascade multilevel inverter which employs H-bridge inverter(HBI). A new switching scheme is developed for the SVC system. To improve the unbalanced problem of the DC capacitor voltages, the rotated switching scheme of fundamental frequency is newly used. The optimized fundamental switching pattern with low switching frequency is adapted to be suitable for high application. The selective harmonic elimination method(SHEM) allows to keep the total harmonic distortion(THD) low in the output voltage of multilevel inverter. The SVC system is modeled using the d-q transform which calculates the instantaneous reactive power. This model is used to design a controller and analyze the SVC system. Simulated and experimental results are also presented and discussed to validate the proposed schemes.

Control of Static Var Compensator Using A Cascade Typed Multilevel Voltage Source Inverter (멀티레벨 직렬 전압형 인버터를 이용한 무효전력보상기(SVC)의 제어)

  • Min, Wan-Ki;Park, Yong-Bae;Kim, Yeong-Han;Choi, Jae-Ho
    • Proceedings of the KIEE Conference
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    • 1996.11a
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    • pp.332-335
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    • 1996
  • Multilevel voltage source inverters are emerging as a new breed of power inverter options for high power applications. This paper presents a cascade typed multilevel voltage source inverter which has separate de sources for high voltage. This inverter is proposed for flexible ac transmission systems (FACTS) including static var compensator(SVC), series compensation and phase shifting. It can solve the problems of conventional transformer-based multipulse inverters and the problems of multilevel diode-clamped inverters. To show the superiority of multilevel cascaded inverter, simulation results are discussed in detail.

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