KR101957469B1 - Semiconductor Transformer for Railway Vehicle using Multiwinding High-frequency Transformer - Google Patents

Semiconductor Transformer for Railway Vehicle using Multiwinding High-frequency Transformer Download PDF

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KR101957469B1
KR101957469B1 KR1020160182694A KR20160182694A KR101957469B1 KR 101957469 B1 KR101957469 B1 KR 101957469B1 KR 1020160182694 A KR1020160182694 A KR 1020160182694A KR 20160182694 A KR20160182694 A KR 20160182694A KR 101957469 B1 KR101957469 B1 KR 101957469B1
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power
transformer
converter
railway vehicle
high frequency
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KR20180078422A (en
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김명룡
이병송
이준호
이수길
이경표
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한국철도기술연구원
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L9/00—Electric propulsion with power supply external to the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
    • B60M1/00—Power supply lines for contact with collector on vehicle
    • B60M1/12—Trolley lines; Accessories therefor
    • B60M1/13—Trolley wires
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/145—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M7/155—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H02M7/162—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/26—Rail vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/30—AC to DC converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2210/00—Converter types
    • B60L2210/40—DC to AC converters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/30—Railway vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • Y02T10/7241—

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

본 발명은 다권선 고주파 변압기를 이용한 철도차량용 반도체 변압기에 관한 것으로; 전차선의 교류전원이 입력되면 직류전원으로 변환하여 출력하도록 다권선의 고주파 변압기가 구비되는 복수의 모듈 컨버터의 입력단이 서로 직렬 연결되어 전차선으로부터 공급되는 교류전원의 전압을 분담하여 입력받고, 상기 복수의 모듈 컨버터의 출력단은 서로 병렬 연결되어 전력을 분담하여 전원 모선으로 출력하는 것을 특징으로 한다.
본 발명에 따르면, 견인부하 및 보조부하 등에 전원을 공급하는 회로의 간소화를 통해 철도차량의 중량을 경감시킬 수 있어 에너지 효율 개선과 철도차량의 운행 성능 및 운송능력의 향상 효과가 있다.The present invention relates to a semiconductor transformer for a railway vehicle using a multi-winding high-frequency transformer, The input terminals of the plurality of modular converters provided with the multi-winding high-frequency transformer are connected in series to each other to share the voltage of the AC power supplied from the electric wire, The output terminals of the module converters are connected in parallel to each other to share power and output the power bus lines.
According to the present invention, the weight of the railway vehicle can be reduced by simplifying the circuit for supplying power to the traction load and the auxiliary load, thereby improving the energy efficiency and improving the running performance and the transportation ability of the railway vehicle.

Description

다권선 고주파 변압기를 이용한 철도차량용 반도체 변압기 {Semiconductor Transformer for Railway Vehicle using Multiwinding High-frequency Transformer }TECHNICAL FIELD [0001] The present invention relates to a semiconductor transformer for a railway vehicle using a multi-winding high-frequency transformer,

본 발명은 다권선 고주파 변압기를 이용한 철도차량용 반도체 변압기에 관한 것으로서, 좀더 상세하게는 다권선 고주파 변압기를 적용한 반도체 변압기의 출력을 철도차량간 연결케이블을 통하여 각 철도차량에 공급하는 전원모선을 구성하므로써 견인부하 및 보조부하 등에 전원을 공급하는 회로를 간소화하고 부하상태에 따라 출력 컨버터의 운전을 조절하여 반도체 변압기의 운전효율을 향상시킬 수 있는 철도차량용 반도체 변압기에 관한 것이다.The present invention relates to a semiconductor transformer for a railway vehicle using a multi-winding high-frequency transformer, and more particularly, to a power supply bus for supplying an output of a semiconductor transformer using a multi-winding high-frequency transformer to each railway vehicle through a connecting cable between railway vehicles To a semiconductor transformer for a railway vehicle that can simplify a circuit for supplying power to a traction load and an auxiliary load, and can improve the operation efficiency of a semiconductor transformer by controlling the operation of the output converter according to a load state.

일반적으로 철도차량은 대형수송수단으로서 점진적으로 그 이용인원이 증가함에 따라 그 중요성이 확대되고 있으며, 전국적인 연결망을 갖도록 건설 또는 운영되고 있는바, 이와 같은 철도의 양적 팽창에 따라 철도의 이용자는 성능, 안정성, 쾌적성 및 기술력 확보 등 질적 서비스의 향상을 요구하고 있는 실정이다. In general, the importance of railway vehicles is increasing as their use increases gradually as a large-scale transportation means, and they are being constructed or operated to have a nationwide network. As a result of such quantitative expansion of railway, , Stability, comfort, and technological capability.

기존의 철도차량용 주변압기는 교류 전압을 견인 모터 및 기타 차량에 설치된 전기장치가 작동하기 적합한 전압 레벨로 강하시키는 것으로, 등록특허 제10-1621803호, 등록특허 제10-0881086호 등에 제안된 바 있다. 이와 같은 통상의 주변압기는 2차측 코일을 통해 견인구동 장치에 전력을 공급하며, 보조 코일(또는 3차코일)을 통해 보조전원장치에 전력을 공급한다. Conventional rolling stock main transformers for rolling stock have been proposed, for example, in Japanese Patent No. 10-1621803, No. 10-0881086, and the like to lower the AC voltage to a voltage level suitable for operation of a traction motor and other electric devices installed in a vehicle . Such a conventional main transformer supplies power to the traction drive through the secondary coil and supplies power to the auxiliary power through the auxiliary coil (or tertiary coil).

그런데, 전차선으로부터 공급되는 25000V의 높은 전압이 철도차량용 주변압기에 직접 입력되므로 절연을 유지하기 위하여 대량의 절연유를 사용하므로 환경의 문제와 절연유의 절연성능을 유지하기 위한 주기적인 유지보수를 필요로 하고 절연db의 열화 등으로 인한 고장 발생 시 대규모의 교체작업 등을 필요로 하여 이에 대한 개선이 필요하다. However, since a high voltage of 25000 V supplied from a catenary cable is directly input to a main transformer for a railway vehicle, a large amount of insulating oil is used to maintain insulation, so periodic maintenance is required to maintain the environmental problem and insulation performance of the insulating oil In case of failure due to deterioration of insulation db, etc., large-scale replacement work is required and improvement is needed.

또한, 주변압기는 2차측 코일을 통해 전력을 공급받는 견인구동 장치는 견인 컨버터 장치와 견인 인버터 장치로 구성되어지며, 견인 컨버터 장치는 주변압기로부터 공급되는 교류 전압을 직류 전압으로 변환시키고, 다시 직류 전압을 견인 인버터에 제공하여 견인 모터를 구동시킨다. 전동차 등 철도차량은 열차를 구성하는 각 차량에 동력이 분산되어 있으며, 주변압기, 견인구동장치 등은 객실의 하부에 분산되어 설치되어야 한다. The main transformer is constituted by a traction converter device and a traction inverter device which are supplied with power through the secondary coil. The traction converter device converts an AC voltage supplied from the main transformer into a DC voltage, Voltage to the traction inverter to drive the traction motor. Railway vehicles such as electric trains are dispersed in each vehicle constituting a train, and main transformers and traction drives should be installed at the lower part of the cabin.

이와 같이, 종래 철도차량의 전력 공급을 위한 주변압기, 견인 컨버터, 견인 인버터는 철도차량에 설치되는 기기 가운데 대형, 중량인 장치들로 체적 및 중량의 크기는 각 차량마다 설치되는 기기배치 및 차량의 중량에 영향을 미치는 것으로, 차량의 기기배치 및 에너지 효율의 향상을 위하여 각 장치들의 체적 및 중량을 감소시키는 것이 설계에 있어 매우 중요하다.In this way, the main transformer, traction converter, and traction inverter for power supply of conventional railway vehicles are large and heavy devices among the equipments installed in the railway vehicles. It is very important in design to reduce the volume and weight of each device in order to improve the device arrangement and energy efficiency of the vehicle by affecting the weight.

참고문헌 1: 등록특허 제10-1621803호Reference 1: Registration No. 10-1621803 참고문헌 2: 등록특허 제10-0881086호Reference 2: Registration No. 10-0881086

따라서, 본 발명은 이러한 점에 착안한 것으로서, 본 발명은 다권선 고주파 변압기를 적용한 반도체 변압기의 출력을 철도차량 간 연결케이블을 통하여 각 철도차량에 공급하는 전원 모선을 구성함으로써 견인부하 및 보조부하 등에 전원을 공급하는 회로를 간소화하고 부하상태에 따라 출력 컨버터의 운전을 조절하여 반도체 변압기의 운전효율을 향상시킬 수 있는 다권선 고주파 변압기를 이용한 철도차량용 반도체 변압기를 제공하는데 그 목적이 있다.Accordingly, the present invention is directed to this point, and the present invention provides a power supply bus that supplies the output of a semiconductor transformer using a multi-winding high-frequency transformer to each railway vehicle through a connecting cable between railway vehicles, The object of the present invention is to provide a semiconductor transformer for a railway vehicle using a multi-winding high frequency transformer that can simplify a circuit for supplying power and adjust the operation of an output converter according to a load condition to improve the operation efficiency of a semiconductor transformer.

이와 같은 기술적 과제를 해결하기 위해 본 발명은; In order to solve such a technical problem,

전차선의 교류전원이 입력되면 직류전원으로 변환하여 출력하도록 다권선의 고주파 변압기가 구비되는 복수의 모듈 컨버터의 입력단이 서로 직렬 연결되어 전차선으로부터 공급되는 교류전원의 전압을 분담하여 입력받고, 상기 복수의 모듈 컨버터의 출력단은 서로 병렬 연결되어 전력을 분담하여 전원 모선으로 출력하는 것을 특징으로 하는 다권선 고주파 변압기를 이용한 철도차량용 반도체 변압기를 제공한다. The input terminals of a plurality of module converters having multi-winding high-frequency transformers are connected in series to each other to share the voltage of the AC power supplied from the electric wires, And the output ends of the module converters are connected in parallel to each other to share electric power and output the electric power to the power supply buses. The present invention provides a semiconductor transformer for a railway vehicle using the multi-winding high frequency transformer.

이때, 상기 복수의 모듈 컨버터는 전차선의 교류전원이 전압이 분담된 상태로 입력되면 직류전원으로 변환하는 입력측 AC/DC 컨버터와, 상기 AC/DC 컨버터의 직류전원을 고주파 교류전원으로 변환하는 고주파 DC/AC 인버터와, 상기 고주파 DC/AC 인버터의 고주파 교류전원이 1차측으로 입력되면 변압하여 2차측으로 출력하는 고주파 변압기와, 상기 고주파 변압기의 2차측 고주파 교류전원을 직류전원으로 변환하는 출력측 AC/DC 컨버터로 구성되는 것을 특징으로 한다. In this case, the plurality of module converters include an input side AC / DC converter for converting the alternating current power of the AC line to a DC power when the voltage is input, a high frequency DC And an output AC / AC converter for converting the secondary high-frequency AC power of the high-frequency transformer into a DC power, a high-frequency transformer for transforming the high-frequency AC power of the high-frequency DC / AC inverter to a primary side, DC converter.

그리고, 상기 복수의 모듈 컨버터는 입력측 AC/DC 컨버터의 입력단이 서로 직렬 연결되고, 상기 출력측 AC/DC 컨버터의 출력단은 서로 병렬 연결되는 것을 특징으로 한다. The plurality of module converters may have input ends of the input side AC / DC converters connected in series, and output ends of the output side AC / DC converters may be connected in parallel with each other.

또한, 상기 입력측 AC/DC 컨버터와 고주파 DC/AC 인버터 및 출력측 AC/DC 컨버터는 3 level NPC(Neutral-Point-Clamped) H-Bridge로 구성되는 것을 특징으로 한다. Also, the input side AC / DC converter, the high frequency DC / AC inverter, and the output side AC / DC converter are formed of a 3-level Neutral-Point-Clamped H-Bridge.

아울러, 상기 전원 모선의 직류전압은 각 철도차량에 구비되는 견인 인버터에 공급되는 것을 특징으로 한다.In addition, the DC voltage of the power bus line is supplied to the traction inverter provided in each railway vehicle.

그리고, 상기 전원 모선의 직류전압은 각 철도차량에 구비되는 냉난방, 등구류, 기타 객실 서비스기기를 포함하는 보조부하에 공급되는 것을 특징으로 한다.The DC voltage of the power supply bus is supplied to an auxiliary load including air conditioning, lighting, and other room service equipments provided in each railway vehicle.

본 발명에 따르면, 견인부하 및 보조부하 등에 전원을 공급하는 회로의 간소화를 통해 철도차량의 중량을 경감시킬 수 있어 에너지 효율 개선과 철도차량의 운행 성능 및 운송능력의 향상 효과가 있다.According to the present invention, the weight of the railway vehicle can be reduced by simplifying the circuit for supplying power to the traction load and the auxiliary load, thereby improving the energy efficiency and improving the running performance and the transportation ability of the railway vehicle.

아울러, 본 발명에 의하면 에너지 효율을 개선하는 한편 NPC(Neutral-Point-Clamped) 구조의 스위칭 구조를 구성하므로서 반도체 소자에 가해지는 전압 스트레스를 낮추어주어 안정성 및 신뢰성을 높임과 동시에 스위칭 주파수를 높게 사용할 수 있는 효과도 있다.In addition, according to the present invention, the energy efficiency is improved and the switching structure of the NPC (Neutral-Point-Clamped) structure is constituted, so that the voltage stress applied to the semiconductor device is lowered to improve the stability and reliability, There is also an effect.

도 1은 본 발명에 따른 다권선 고주파 변압기를 이용한 철도차량용 반도체 변압기의 전체 구성도이다.
도 2는 본 발명에 따른 다권선 고주파 변압기를 이용한 철도차량용 반도체 변압기의 상세 구성도이다.
도 3은 본 발명에 따른 철도차량용 반도체 변압기의 모듈 컨버터를 도시한 상세 구성도이다.1 is a diagram showing the overall configuration of a semiconductor transformer for a railway vehicle using a multi-winding high-frequency transformer according to the present invention.
2 is a detailed configuration diagram of a semiconductor transformer for a railway vehicle using the multi-winding high-frequency transformer according to the present invention.
3 is a detailed block diagram showing a module converter of a semiconductor transformer for a railway vehicle according to the present invention.

이하, 본 발명에 따른 다권선 고주파 변압기를 이용한 철도차량용 반도체 변압기를 첨부한 도면을 참고로 하여 상세히 기술되는 실시 예에 의하여 그 특징들을 이해할 수 있을 것이다. Hereinafter, a semiconductor transformer for a railway vehicle using the multi-winding high-frequency transformer according to the present invention will be described in detail with reference to the accompanying drawings.

이에 앞서, 본 명세서 및 청구범위에 사용된 용어나 단어는 통상적이거나 사전적인 의미로 한정해서 해석되어서는 아니 되며, 발명자는 그 자신의 발명을 가장 최선의 방법으로 설명하기 위해 용어의 개념을 적절하게 정의할 수 있다는 원칙에 입각하여 본 발명의 기술적 사상에 부합하는 의미와 개념으로 해석되어야만 한다.Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

따라서, 본 명세서에 기재된 실시 예와 도면에 도시된 구성은 본 발명의 가장 바람직한 일 실시 예에 불과할 뿐이고, 본 발명의 기술적 사상을 모두 대변하는 것은 아니므로, 본 출원시점에 있어서 이들은 대체할 수 있는 다양한 균등물과 변형 예들이 있을 수 있음을 이해하여야 한다. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It should be understood that various equivalents and modifications may be present.

도 1을 참고하면, 본 발명에 따른 다권선 고주파 변압기를 이용한 철도차량용 반도체 변압기(Semiconductor Transformer)(100)는 전차선(1)으로부터 공급되는 25000V의 높은 교류전원이 입력되면 직류전원으로 변환하여 출력한다. 1, a semiconductor transformer 100 for a railway vehicle using a multi-winding high-frequency transformer according to the present invention converts a high alternating current power of 25000 V supplied from a catenary 1 into a direct current .

이때, 반도체 변압기(100)의 직류 출력단을 철도차량(10)의 전원 모선(Train Bus)(12)에 연결하여 각각의 철도차량(10)에 직접 공급하므로써 견인구동 장치를 구성하는 견인 컨버터를 이용하지 않고도 직접 직류전압을 각 철도차량(10)에 구비되는 견인 인버터(200)에 공급할 수 있어 동력 분산식의 철도차량을 구성하기 용이하다.At this time, the DC output terminal of the semiconductor transformer 100 is connected to the power bus 12 of the railway car 10 and directly supplied to each railway car 10, thereby using the traction converter constituting the traction drive device It is possible to supply the direct DC voltage to the traction inverter 200 provided in each railway vehicle 10, thereby making it easy to construct a power train type railway vehicle.

물론, 상기 견인 인버터(200)는 반도체 변압기(100)로부터 공급되는 직류 전원이 전원 모선(Train Bus)(12)을 통해 공급되면 다시 교류 전원으로 변환하여 견인 모터(Tractioin Motor)(210)를 구동시킨다. Of course, when the DC power supplied from the semiconductor transformer 100 is supplied through the train bus 12, the traction inverter 200 converts the AC power to AC power and drives the traction motor 210 .

그리고, 상기 각각의 철도차량(10)에 구비되는 냉난방, 등구류, 기타 객실 서비스기기 등의 보조부하(Aux. Circuit)(300)는 상기 전원 모선(Train Bus)(12)으로부터 공급되는 직류 전원을 공급받아 구동된다.An auxiliary load circuit (Auxiliary Circuit) 300 of each railway vehicle 10, such as cooling and heating, light fixture, and other room service equipment, is connected to a DC power supplied from the power bus 12, And is driven.

이와 같은 본 발명에 따른 반도체 변압기(100)는 도 2를 참고하면 집전장치(20)를 통해 전차선(1)의 교류전원이 입력되면 직류전원으로 변환하여 출력하는 복수의 모듈 컨버터(110)의 입력단이 서로 직렬 연결되어 전차선(1)으로부터 공급되는 25000V의 높은 교류전원의 전압을 분담하여 입력받고, 상기 복수의 모듈 컨버터(110)의 출력단은 서로 병렬 연결되어 전력을 분담하여 전원 모선(Train Bus)(12)으로 출력하는 구성이다.2, the semiconductor transformer 100 according to the present invention includes a plurality of module converters 110 for converting an alternating current power of a catenary 1 into a DC power through an electric current collector 20, And the output terminals of the plurality of module converters 110 are connected in parallel with each other to share electric power and supply electric power to the power bus line (Train Bus) (12).

이때, 상기 각각의 모듈 컨버터(110)는 전차선(1)의 교류전원이 전압이 분담된 상태로 입력되면 직류전원으로 변환하는 입력측 AC/DC 컨버터(112)와, 상기 AC/DC 컨버터(112)의 직류전원을 고주파 교류전원으로 변환하는 고주파 DC/AC 인버터(114)와, 상기 고주파 DC/AC 인버터(114)의 고주파 교류전원이 1차측으로 입력되면 변압하여 2차측으로 출력하는 고주파 변압기(116)와, 상기 고주파 변압기(116)의 2차측 고주파 교류전원을 직류전원으로 변환하는 출력측 AC/DC 컨버터(118)로 구성되며, 이들이 하나의 모듈을 형성한다.Each of the module converters 110 includes an input side AC / DC converter 112 for converting the AC power of the catenary 1 into a DC power when the AC power is inputted in a state of sharing the voltage, A high frequency DC / AC inverter 114 for converting a DC power of the high frequency DC / AC inverter 114 into a high frequency AC power, a high frequency transformer 116 for transforming the high frequency AC power of the high frequency DC / AC inverter 114 to a secondary side, And an output side AC / DC converter 118 for converting the secondary side high frequency AC power of the high frequency transformer 116 into a DC power source, which form one module.

이와 같은 각각의 모듈 컨버터(110)의 입력측 AC/DC 컨버터(112)의 입력단은 서로 직렬 연결되어 전차선(1)의 높은 교류전원의 전압을 분담 입력받으며, 상기 출력측 AC/DC 컨버터(118)의 출력단은 서로 병렬 연결되어 전력을 분담하여 전원 모선(Train Bus)(12)으로 출력한다.The input terminals of the input side AC / DC converter 112 of each of the module converters 110 are connected to each other in series to share the high alternating current voltage of the electric cable 1 and the input side AC / DC converter 112 of the output side AC / The output terminals are connected in parallel to each other to share power and output to the power bus 12 (train bus).

즉, 복수(n개)의 모듈 컨버터(110)에서 상기 입력측 AC/DC 컨버터(112)의 입력단은 직렬로 연결하여 전차선 전압을 1/n로 분담하도록 하므로써 전력반도체에 가해지는 전압스트레스를 경감시킬 수 있으며, 상기 출력측 AC/DC 컨버터(118)의 출력단은 병렬로 연결하여 철도차량에서 필요로 하는 전력을 공급하는 데 있어 전력을 1/n로 분담하여 전류 스트레스를 경감시킬 수 있다. That is, the input terminals of the input side AC / DC converter 112 in the plurality (n) of the module converters 110 are connected in series to share the electric line voltage at 1 / n, thereby reducing the voltage stress applied to the power semiconductor And output terminals of the output side AC / DC converter 118 may be connected in parallel to share power by 1 / n in order to supply electric power required by the railway vehicle, thereby reducing current stress.

이때, 직렬 연결된 입력측 AC/DC 컨버터(112) 및 고주파 DC/AC 인버터(114)와 병렬로 연결되는 부하측의 출력측 AC/DC 컨버터(118)는 고주파 변압기(116)에 의하여 전기적으로 분리되고 자기적인 결합에 의하여 에너지만을 전달하게 된다. At this time, the output side AC / DC converter 118 connected in parallel with the input side AC / DC converter 112 and the high frequency DC / AC inverter 114 connected in series is electrically separated by the high frequency transformer 116, And only the energy is transmitted by the coupling.

그리고, 상기 고주파 변압기(116)는 다권선의 고주파 변압기로 구성하여 각각의 모듈 컨버터(110)간의 자기회로를 공유하므로써, 철도차량(10)의 부하가 줄어드는 경우 n개의 출력 컨버터 가운데 일부만 작동하여 높은 효율로 출력을 공급하므로써 경부하시 효율이 저감되는 것을 방지하고 반도체 변압기(100)의 운전효율을 향상시킬 수 있게 된다.The high-frequency transformer 116 is a multi-winding high-frequency transformer and shares a magnetic circuit between the module converters 110. When the load of the railway vehicle 10 is reduced, only a part of the n output converters operates, The efficiency can be prevented from being reduced and the operation efficiency of the semiconductor transformer 100 can be improved by supplying the output with efficiency.

한편, 상기 모듈 컨버터(110)를 구성하는 입력측 AC/DC 컨버터(112)와, 고주파 DC/AC 인버터(114) 및 출력측 AC/DC 컨버터(118)는 도 3에 도시한 바와 같이 3 level NPC(Neutral-Point-Clamped) H-Bridge로 구성하여 양방향의 에너지 전달이 가능하고, 각각의 반도체 스위칭 소자(112a,114a,118a)에 인가되는 전압을 또 다시 전차선 전압/(2n)으로 낮추어 주므로써 각각의 반도체 스위칭 소자(112a,114a,118a)가 겪게 되는 전압 스트레스를 낮추어 주며, 고주파 교류출력의 출력 주파수를 높게 설정하여 고주파 변압기(116)의 크기를 줄일 수 있도록 하여 중량과 부피를 많이 차지하게되는 반도체 변압기(100) 전체의 중량과 크기를 줄일 수 있다. 3, the input side AC / DC converter 112, the high frequency DC / AC inverter 114, and the output side AC / DC converter 118, which constitute the module converter 110, (H-bridge), and bidirectional energy transfer is possible. Further, the voltage applied to each of the semiconductor switching elements 112a, 114a and 118a is lowered to the electric line voltage / (2n) The voltage stress experienced by the semiconductor switching elements 112a, 114a, and 118a of the high-frequency transformer 112a is reduced, and the output frequency of the high-frequency AC output is set high to reduce the size of the high-frequency transformer 116, The weight and size of the entire semiconductor transformer 100 can be reduced.

그리고, 집전장치(20)를 통해 전차선(1)으로부터 공급되는 전압이 교류구간의 경우 반도체 변압기(100)로 입력되고 직류구간의 경우 차량의 전원모선에 직접 연결되는 구성을 하여 전차선 전압이 직류인 구간과 교류인 구간을 모두 운행할 수 있도록 한 교류/직류 겸용의 차량회로를 구성한 것으로 스위치(20) 전환에 따라 교류구간만을 운행하는 철도차량의 경우 전차선(1)의 교류전압을 철도차량(10)의 전원 모선(12)에 직접 연결하도록 한 회로를 생략하므로써 교류구간의 전용차량을 구성할 수 있다.When the voltage supplied from the electric cable 1 through the current collector 20 is inputted to the semiconductor transformer 100 in the AC section and directly connected to the power supply bus of the vehicle in the DC section, The vehicle circuit for both AC and DC is configured so as to be able to operate both the section and the AC section. In the case of a railway vehicle which only operates in the AC section according to the switch 20, the AC voltage of the electric line 1 is transmitted to the railway vehicle 10 The power source bus line 12 of the vehicle can be omitted and a dedicated vehicle for the AC section can be constructed.

또한, 본 발명에 따른 다권선 고주파 변압기(116)는 부하구조에 따라 몇 개의 서브그룹으로 구분하여 구성할 수도 있으며, 사용하는 반도체 스위칭 소자(112a,114a,118a)의 용량이 충분한 경우 또는 모듈 컨버터(110)의 숫자를 줄이거나 스위칭 주파수를 높이 사용할 수 있는 소자의 경우에는 3-level NPC(Neutral-Point-Clamped) 구조가 아닌 2 level의 구조를 가질 수 있다.Also, the multi-winding high-frequency transformer 116 according to the present invention may be divided into several subgroups according to the load structure. If the capacity of the semiconductor switching elements 112a, 114a, and 118a to be used is sufficient, In the case of a device capable of reducing the number of the switching elements 110 or using a high switching frequency, it can have a two-level structure instead of a 3-level NPC (Neutral-Point-Clamped) structure.

이와 같은 다권선 고주파 변압기(116)를 사용함으로써 철도차량의 중량을 경감시킬 수 있어 에너지 효율과 철도차량의 운행 성능 및 운송능력을 향상시키고, 효율을 개선하는 한편 NPC(Neutral-Point-Clamped) 구조의 스위칭 구조를 구성하므로서 반도체 소자에 가해지는 전압 스트레스를 낮추어주어 안정성 및 신뢰성을 높임과 동시에 스위칭 주파수를 높게 사용할 수 있다.By using such a multi-winding high-frequency transformer 116, the weight of the railway vehicle can be reduced, thereby improving the energy efficiency, the running performance and the transportation ability of the railway vehicle and improving the efficiency, while the NPC (Neutral-Point-Clamped) The voltage stress applied to the semiconductor device can be lowered to improve the stability and reliability, and at the same time, the switching frequency can be increased.

이상의 설명은 본 발명의 기술 사상을 예시적으로 설명한 것에 불과한 것으로서, 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자라면 본 발명의 본질적인 특성에서 벗어나지 않는 범위에서 다양한 수정 및 변형 가능한 것으로, 본 발명의 보호범위는 아래의 청구범위에 의하여 해석되어야 하며, 그와 동등한 범위 내에 있는 모든 기술 사상은 본 발명의 권리범위에 포함되는 것으로 해석되어야 할 것이다.It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. The scope of protection of the present invention should be construed under the following claims, and all technical ideas within the scope of equivalents thereof should be construed as being included in the scope of the present invention.

1: 전차선 10: 철도차량
12: 전원 모선 100: 반도체 변압기
112: 입력측 AC/DC 컨버터 114: 고주파 DC/AC 인버터
116: 고주파 변압기 118: 출력측 AC/DC 컨버터
200: 견인 인버터 210: 견인 모터
300: 보조부하 1: Tram line 10: Railway vehicle
12: Power bus 100: Semiconductor transformer
112: input side AC / DC converter 114: high frequency DC / AC inverter
116: high frequency transformer 118: output side AC / DC converter
200: Traction inverter 210: Traction motor
300: auxiliary load

Claims (6)

전차선의 교류전원이 입력되면 직류전원으로 변환하여 출력하도록 다권선의 고주파 변압기가 구비되는 복수의 모듈 컨버터의 입력단이 서로 직렬 연결되어 전차선으로부터 공급되는 교류전원의 전압을 분담하여 입력받고, 상기 복수의 모듈 컨버터의 출력단은 서로 병렬 연결되어 전력을 분담하여 전원 모선으로 출력하되,
상기 복수의 모듈 컨버터는 전차선의 교류전원이 전압이 분담된 상태로 입력되면 직류전원으로 변환하는 입력측 AC/DC 컨버터와, 상기 AC/DC 컨버터의 직류전원을 고주파 교류전원으로 변환하는 고주파 DC/AC 인버터와, 상기 고주파 DC/AC 인버터의 고주파 교류전원이 1차측으로 입력되면 변압하여 2차측으로 출력하는 고주파 변압기와, 상기 고주파 변압기의 2차측 고주파 교류전원을 직류전원으로 변환하는 출력측 AC/DC 컨버터로 구성되는 것을 특징으로 하는 다권선 고주파 변압기를 이용한 철도차량용 반도체 변압기.
The input terminals of the plurality of modular converters provided with the multi-winding high-frequency transformer are connected in series to each other to share the voltage of the AC power supplied from the electric wire, The output terminals of the module converter are connected in parallel with each other to share the power and output the power bus line,
The module converter includes an input side AC / DC converter for converting the alternating current power of a catenary into a DC power when a voltage is shared, a high frequency DC / AC converter for converting the DC power of the AC / DC converter into a high frequency AC power, And an output side AC / DC converter for converting the secondary side high frequency AC power of the high frequency transformer to a DC power source, and an output side AC / DC converter for converting the high frequency AC power of the high frequency transformer into a DC power source, Wherein the transformer is a transformer for a railway vehicle using a multi-winding high-frequency transformer.
삭제delete 제 1항에 있어서,
상기 복수의 모듈 컨버터는 입력측 AC/DC 컨버터의 입력단이 서로 직렬 연결되고, 상기 출력측 AC/DC 컨버터의 출력단은 서로 병렬 연결되는 것을 특징으로 하는 다권선 고주파 변압기를 이용한 철도차량용 반도체 변압기.
The method according to claim 1,
Wherein the input terminals of the input side AC / DC converters are connected in series to each other, and the output terminals of the output side AC / DC converters are connected in parallel to each other.
제 1항에 있어서,
상기 입력측 AC/DC 컨버터와 고주파 DC/AC 인버터 및 출력측 AC/DC 컨버터는 3 level NPC(Neutral-Point-Clamped) H-Bridge로 구성되는 것을 특징으로 하는 다권선 고주파 변압기를 이용한 철도차량용 반도체 변압기.
The method according to claim 1,
Wherein the input side AC / DC converter, the high frequency DC / AC inverter, and the output side AC / DC converter are composed of a 3 level Neutral-Point Clamped (NPC) H bridge.
제 1항에 있어서,
상기 전원 모선의 직류전압은 각 철도차량에 구비되는 견인 인버터에 공급되는 것을 특징으로 하는 다권선 고주파 변압기를 이용한 철도차량용 반도체 변압기.
The method according to claim 1,
Wherein the DC voltage of the power bus is supplied to a traction inverter provided in each railway vehicle.
제 1항에 있어서,
상기 전원 모선의 직류전압은 각 철도차량에 구비되는 냉난방, 등구류, 기타 객실 서비스기기를 포함하는 보조부하에 공급되는 것을 특징으로 하는 다권선 고주파 변압기를 이용한 철도차량용 반도체 변압기. The method according to claim 1,
Wherein the direct current voltage of the power supply bus is supplied to an auxiliary load including air conditioning, air conditioning, and other room service equipments provided in each railway vehicle.
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