KR20190068887A - Ac output voltage parallel operation control device of aps in railway - Google Patents

Ac output voltage parallel operation control device of aps in railway Download PDF

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KR20190068887A
KR20190068887A KR1020170169117A KR20170169117A KR20190068887A KR 20190068887 A KR20190068887 A KR 20190068887A KR 1020170169117 A KR1020170169117 A KR 1020170169117A KR 20170169117 A KR20170169117 A KR 20170169117A KR 20190068887 A KR20190068887 A KR 20190068887A
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voltage
inverter
output
output voltage
command value
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KR101994549B1 (en
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김기수
최봉연
이상석
박영호
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현대로템 주식회사
주식회사 팩테크
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    • 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
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac 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 triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac 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 triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5387—Conversion of dc power input into ac 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 triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters 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
    • B60L1/00—Supplying electric power to auxiliary equipment of 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
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/003—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to inverters
    • 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
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/51—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells characterised by AC-motors
    • 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
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0009—Devices or circuits for detecting current in a converter
    • 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
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2200/00—Type of vehicle
    • B60Y2200/30—Railway vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/30—Sensors
    • B60Y2400/308—Electric sensors
    • B60Y2400/3084—Electric currents sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/30—Sensors
    • B60Y2400/308—Electric sensors
    • B60Y2400/3086—Electric voltages sensors
    • H02M2001/0009—
    • 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
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Inverter Devices (AREA)

Abstract

The present invention relates to a control device for a parallel operation of an AC output voltage in an auxiliary power supply device for a railway vehicle. According to one embodiment of the present invention, the control device comprises: first and second inverters provided in first and second auxiliary power supply devices for a railway vehicle, respectively, connected in parallel with each other, and configured to supply a three-phase AC output voltage to the load of the railway vehicle; first and second current detection units configured to detect currents outputted from the first and second inverters, respectively; first and second voltage detection units configured to detect voltages outputted from the first and second inverters, respectively; and first and second parallel operation control units configured to receive a current detection value and a voltage detection value from the first and second current detection units, respectively, calculate a control instruction value for an output frequency and a control instruction value for an output voltage using the received current detection value and voltage detection value, and control the first and second inverters, such that a three-phase voltage, a phase of which is delayed by a voltage variation of a DC-link of each of the first and second inverters, is outputted from rating of the output frequency. According to the present invention, it is possible to effectively reduce a circulating current in an initial transient state.

Description

철도차량용 보조전원장치 교류출력전압 병렬운전 제어장치{AC OUTPUT VOLTAGE PARALLEL OPERATION CONTROL DEVICE OF APS IN RAILWAY}TECHNICAL FIELD [0001] The present invention relates to an AC output voltage parallel operation control device,

본 발명은 철도차량용 보조전원장치 교류출력전압 병렬운전 제어장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary power supply AC output voltage parallel operation controller for a railway vehicle.

철도 차량에 탑재되는 보조전원장치(이하, APS)는 가선으로부터 전원을 공급받아 차량의 냉난방기 제동장치 조명 및 각종 전자장치 등에 필요한 전원을 공급하는 핵심적인 전장품이다. 기존 APS는 차량 편성에 따라 2대 혹은 3대가 차량에 탑재되어 각각 두량 또는 세량 부하를 담당한다. 하지만, 이 방식은 탑재된 APS의 일부가 고장이 발생하게 될 시 고장난 APS에 연결된 부하에 전력공급이 차단되는 문제를 가지고 있다.An auxiliary power unit (hereinafter referred to as APS) mounted on a railway vehicle is a core electrical device that receives power from a power line and supplies power to a vehicle's cooling / heating system braking system lighting and various electronic devices. In the existing APS, two or three cars are installed in the vehicle, and each car takes charge of two or three loads. However, this method has a problem in that when a part of the APS on which a fault occurs, the power supply to the load connected to the faulty APS is interrupted.

일반적으로 개별 부하 사이에 설치된 접촉기의 연결을 통해 연장급전을 수행하도록 되어있지만 연장급전을 위한 접촉기가 동작하기까지 전원이 차단되어 승객의 불편을 초래한다.Generally, it is supposed to perform an extended power supply through the connection of the contactor installed between the individual loads, but the power supply is cut off until the contactor for the extended power supply is operated.

최근, 기존의 개별부하 공급방식과는 달리 모든 APS가병렬로 연결되어 일부 APS의 고장이 발생하더라도 전력 차단없이 정상 APS가 전력공급을 수행하기 위한 APS의 병렬운전이 연구되고 있다. 또한, APS가 설치되는 차량간 거리가 멀기 때문에 별도의 통신 없이 드룹(Droop) 제어를 통한 병렬운전 기법이 함께 검토되고 있다.Recently, APS parallel operation has been researched in order to perform power supply of normal APS without power interruption even if all APSs are connected in parallel, unlike the conventional individual load supply method. In addition, since the distance between vehicles where the APS is installed is long, a parallel operation technique through droop control is being studied together without any additional communication.

한국공개특허공보 제10-2015-0121474호(2015.10.29.)Korean Patent Publication No. 10-2015-0121474 (Oct. 29, 2015).

본 발명은 초기 과도 상태에서의 순환전류의 효과적인 저감을 위한 철도차량용 보조전원장치 교류출력전압 병렬운전 제어장치를 제공하는 것이다.The present invention provides an auxiliary power supply AC output voltage parallel operation controller for a railway vehicle for effectively reducing circulation current in an initial transient state.

본 발명의 일 실시예에 따르면, 철도차량의 제1 보조전원장치 및 제2 보조전원장치 각각에 구비되고, 병렬로 연결되어 철도차량의 부하에 3상 교류출력전압을 공급하는 제1 인버터 및 제2 인버터, 상기 제1 인버터 및 상기 제2 인버터 각각으로부터 출력되는 전류를 검출하는 제1 전류검출부 및 제2 전류검출부, 상기 제1 인버터 및 상기 제2 인버터 각각으로부터 출력되는 전압을 검출하는 제1 전압검출부 및 제2 전압검출부, 및 상기 제1 전류검출부 및 상기 제1 전압검출부 각각으로부터 전류검출값 및 전압검출값을 수신하고, 수신한 전류검출값 및 전압검출값을 이용하여 출력주파수의 제어 지령치 및 출력전압의 제어 지령치를 연산하며, 출력주파수의 정격으로부터 상기 제1 인버터 및 상기 제2 인버터 각각의 DC-link의 전압변화량만큼 위상이 지연된 3상 전압을 출력시키도록 상기 제1 인버터 및 상기 제2 인버터를 제어하는 제1 병렬운전 제어부 및 제2 병렬운전 제어부를 포함하는, 철도차량용 보조전원장치 교류출력전압 병렬운전 제어장치를 제공한다.According to an embodiment of the present invention, a first inverter and a second inverter are provided in the first auxiliary power supply unit and the second auxiliary power supply unit of a railway car and connected in parallel to supply a three-phase alternating current output voltage to the load of the railway car, A first current detector and a second current detector for detecting a current outputted from each of the first inverter, the second inverter, the first inverter and the second inverter, a first voltage detecting unit detecting a voltage output from each of the first inverter and the second inverter, And a control unit for receiving the current detection value and the voltage detection value from each of the first current detection unit and the first voltage detection unit and using the received current detection value and the voltage detection value, And a control unit for calculating a control command value of the output voltage based on the output signal of the first inverter and the second inverter, And a second parallel operation control unit for controlling the first inverter and the second inverter to output the voltage of the auxiliary power source AC output voltage parallel operation controller for a railway car.

또한, 상기 제1 병렬운전 제어부는, 상기 출력주파수의 제어 지령치 및 상기 출력전압의 제어 지령치를 연산하여 출력하는 제1 드룹 제어부, 및 상기 출력주파수의 제어 지령치 및 상기 출력전압의 제어 지령치를 수신하여 상기 제1 인버터의 출력전압을 제어하는 제1 출력전압 제어부를 포함하고, 상기 제2 병렬운전 제어부는, 상기 출력주파수의 제어 지령치 및 상기 출력전압의 제어 지령치를 연산하여 출력하는 제2 드룹 제어부, 및 상기 출력주파수의 제어 지령치 및 상기 출력전압의 제어 지령치를 수신하여 상기 제2 인버터의 출력전압을 제어하는 제2 출력전압 제어부를 포함할 수 있다.The first parallel operation control unit may include a first droop control unit for calculating and outputting a control command value of the output frequency and a control command value of the output voltage and a control unit for receiving the control command value of the output frequency and the control command value of the output voltage Wherein the second parallel operation control unit comprises a second droop control unit for calculating and outputting a control command value of the output frequency and a control command value of the output voltage, and a second output voltage controller for controlling the output voltage of the first inverter, And a second output voltage control unit receiving the control command value of the output frequency and the control command value of the output voltage and controlling the output voltage of the second inverter.

또한, 상기 제1 드룹 제어부 및 상기 제2 드룹 제어부 각각은, 수학식 1 [

Figure pat00001
] 및 수학식 2[
Figure pat00002
]를 이용하여 상기 출력주파수의 제어 지령치 및 상기 출력전압의 제어 지령치를 연산할 수 있다.In addition, each of the first droop control unit and the second droop control unit may be expressed by the following equation (1)
Figure pat00001
] And Equation 2 [
Figure pat00002
Can be used to calculate the control command value of the output frequency and the control command value of the output voltage.

또한, 상기 제1 전류검출부 및 상기 제2 전류검출부 각각은, 필터용 리액터의 후단에 설치된 제1 전류센서, 제2 전류센서 및 제3 전류센서를 포함할 수 있다.Each of the first current detector and the second current detector may include a first current sensor, a second current sensor, and a third current sensor disposed downstream of the reactor for the filter.

또한, 상기 제1 전압검출부 및 상기 제2 전압검출부 각각은, 필터용 커패시터에 설치된 제1 전압센서, 제2 전압센서 및 제3 전압센서를 포함할 수 있다.Each of the first voltage detecting unit and the second voltage detecting unit may include a first voltage sensor, a second voltage sensor, and a third voltage sensor provided in the filter capacitor.

본 발명은 출력주파수의 정격으로부터 인버터의 DC-link 의 전압변화량만큼 위상이 지연된 3상 전압을 출력시키도록 인버터를 제어하여 초기 과도 상태에서의 순환전류를 효과적으로 저감할 수 있다.The present invention can effectively reduce the circulating current in the initial transient state by controlling the inverter to output the three-phase voltage whose phase is delayed by the voltage change amount of the DC-link of the inverter from the output frequency rating.

도 1은 APS의 일반적인 구성을 나타내는 도면이다.
도 2는 APS의 병렬운전 수행 시 과도 상태를 나타내는 도면이다.
도 3은 본 발명의 일 실시예에 따른 철도차량용 보조전원장치 교류출력전압 병렬운전 제어장치의 구성을 나타내는 회로도이다.
도 4는 본 발명에 따른 병렬 운전 수행 시 출력전압 및 전류에 대한 파형을 나타내는 도면이다.1 is a diagram showing a general configuration of APS.
FIG. 2 is a diagram showing a transient state during the parallel operation of the APS. FIG.
3 is a circuit diagram showing a configuration of an auxiliary power supply AC output voltage parallel operation control apparatus for a railway vehicle according to an embodiment of the present invention.
4 is a graph showing waveforms of output voltage and current during a parallel operation according to the present invention.

이하에서는, 본 발명의 바람직한 실시예에 기초하여 본 발명을 보다 구체적으로 설명한다. 그러나, 하기 실시예는 본 발명의 이해를 돕기 위한 일 예에 불과한 것으로 이에 의해 본 발명의 권리범위가 축소되거나 한정되는 것은 아니다.Hereinafter, the present invention will be described more specifically based on preferred embodiments of the present invention. However, the following embodiments are merely examples for helping understanding of the present invention, and thus the scope of the present invention is not limited or limited.

도 1은 APS의 일반적인 구성으로 인버터 입력단 공진형 컨버터는 고효율을 위해 인버터 DC-link 전압의 제어를 수행하지 않는다. 따라서 기존 드룹(Droop) 제어 수행 시 초기 과도상태에서 발생하는 순환전류로 인해 DC-link의 전압이 상승하게 된다. 본 발명에서는 초기 과도 상태에서의 순환전류의 효과적인 저감을 위한 드룹(Droop) 제어에 대하여 설명하려고 한다.FIG. 1 shows a general configuration of an APS in which an inverter input-side resonance type converter does not control an inverter DC-link voltage for high efficiency. Therefore, when the droop control is performed, the voltage of the DC-link rises due to the circulating current generated in the initial transient state. In the present invention, the droop control for effectively reducing the circulating current in the initial transient state will be described.

도 1을 참조하면, APS의 병렬 운전을 위해 3상 인버터는 부하와 병렬로 연결될 수 있다.Referring to FIG. 1, a three-phase inverter may be connected in parallel with a load for parallel operation of the APS.

또한, 드룹(Droop) 제어 방식의 APS는 인버터의 출력전력 계산을 통해 인버터의 전압지령과 위상을 하기 수학식 1 및 2와 같이 산출할 수 있다.In addition, the APS of the droop control method can calculate the voltage command and phase of the inverter through the calculation of the output power of the inverter according to the following equations (1) and (2).

[수학식 1][Equation 1]

Figure pat00003
Figure pat00003

[수학식 2]&Quot; (2) "

Figure pat00004
Figure pat00004

수학식 1 및 2에서

Figure pat00005
는 출력주파수의 제어 지령치,
Figure pat00006
은 APS의 정격 출력주파수,
Figure pat00007
은 출력전압의 제어 지령치,
Figure pat00008
은 출력전압의 최대값,
Figure pat00009
와
Figure pat00010
는 각각 유효전력과 무효전력에 따른 출력전압 및 주파수의 드룹(Droop)을 나타낼 수 있다.In equations (1) and (2)
Figure pat00005
Is a control command value of the output frequency,
Figure pat00006
Is the rated output frequency of the APS,
Figure pat00007
A control command value of the output voltage,
Figure pat00008
Is the maximum value of the output voltage,
Figure pat00009
Wow
Figure pat00010
Can represent the droop of the output voltage and frequency according to the active power and the reactive power, respectively.

도 1의 APS1이 부하를 모두 감당하는 도중 APS2가 동작된다면 높은 유효전력을 공급하는 APS1의 인버터가 APS2에 비해 느린 위상을 가지게 되며 APS2에서 APS1으로 전력이 공급되게 된다.If the APS2 is operated while the APS1 of FIG. 1 is handling the load, the inverter of the APS1 which supplies the high active power has a phase slower than the APS2 and the power is supplied from the APS2 to the APS1.

이는 도 2와 같이 APS1의 인버터 DC-link 전압의 상승을 유발하며 고효율 동작을 위해 인버터 DC-link 전압 제어를 수행하지 않는 APS의 특성상 높은 전압 상승은 고장의 원인이 될 수 있다.As shown in FIG. 2, the rise of the DC-link voltage of the inverter of the APS 1 may be caused by the high voltage rise due to the characteristics of the APS which does not perform the inverter DC-link voltage control for the high efficiency operation.

이에, 본 발명에서는, 인버터 DC-link 전압의 변화량을 드룹(Droop) 위상식에 추가함으로써 초기 드룹(Droop) 제어 수행 시 발생하는 순환 전류를 최소화하여 DC-link 전압의 변동을 억제하도록 드룹(Droop) 제어를 수행하는 철도차량용 보조전원장치 교류출력전압 병렬운전 제어장치를 제공할 수 있다.Therefore, in the present invention, by adding the change amount of the inverter DC-link voltage to the drop condition, it is possible to minimize the circulation current generated during the initial droop control and suppress the fluctuation of the DC- ) Auxiliary power supply for an automotive railway car.

이하에서는 도 3을 참조하여 본 발명의 일 실시예에 따른 철도차량용 보조전원장치 교류출력전압 병렬운전 제어장치를 상세하게 설명한다.Hereinafter, an auxiliary power supply AC output voltage parallel operation controller for a railway vehicle according to an embodiment of the present invention will be described in detail with reference to FIG.

도 3은 본 발명의 일 실시예에 따른 철도차량용 보조전원장치 교류출력전압 병렬운전 제어장치의 구성을 나타내는 회로도이다.3 is a circuit diagram showing a configuration of an auxiliary power supply AC output voltage parallel operation control apparatus for a railway vehicle according to an embodiment of the present invention.

도 3을 참조하면, 본 발명의 일 실시예에 따른 철도차량용 보조전원장치 교류출력전압 병렬운전 제어장치는 철도차량의 부하(10,20,30)에 병렬로 연결되어 전원을 공급하는 제1 보조전원장치(100) 및 제2 보조전원장치(200)에 구비되며, 제1 인버터(110), 제2 인버터(210), 제1 전류검출부(120), 제2 전류검출부(220), 제1 전압검출부(130), 제2 전압검출부(230), 제1 병렬운전 제어부(140) 및 제2 병렬운전 제어부(240)를 포함할 수 있다.3, an auxiliary power supply AC output voltage parallel operation controller for a railway vehicle according to an embodiment of the present invention includes a first auxiliary (not shown) connected in parallel to a load (10, 20, 30) The first inverter 110, the second inverter 210, the first current detector 120, the second current detector 220, the first inverter 110, the second inverter 120, And may include a voltage detector 130, a second voltage detector 230, a first parallel operation controller 140, and a second parallel operation controller 240.

제1 인버터(110) 및 제2 인버터(210) 각각은 3상 인버터로 구비되며, 적어도 하나의 부하(10,20,30)와 병렬로 연결될 수 있다.Each of the first inverter 110 and the second inverter 210 is provided as a three-phase inverter and may be connected in parallel with at least one load 10, 20, 30.

제1 전류검출부(120) 및 제2 전류검출부(220) 각각은 제1 인버터(110) 및 제2 인버터(210)로부터 출력되는 전류를 검출할 수 있다. 이를 위하여, 제1 전류검출부(120) 및 제2 전류검출부(220) 각각은 제1 전류센서(121,221), 제2 전류센서(122,222) 및 제3 전류센서(123,223)를 포함할 수 있다.Each of the first current detector 120 and the second current detector 220 may detect a current output from the first inverter 110 and the second inverter 210. [ The first current detector 120 and the second current detector 220 may include first current sensors 121 and 221, second current sensors 122 and 222, and third current sensors 123 and 223, respectively.

여기서, 제1 전류센서(121,221), 제2 전류센서(122,222) 및 제3 전류센서(123,223) 각각은 제1 인버터(110) 및 제2 인버터(210)의 제1 내지 제3 출력라인에서 필터용 리액터(L) 후단에 설치되어 전류를 검출할 수 있다. 또한, 제1 전류센서(121,221), 제2 전류센서(122,222) 및 제3 전류센서(123,223) 각각은 제1 병렬운전 제어부(140) 및 제2 병렬운전 제어부(240)에 전류검출값을 제공할 수 있다.Here, the first current sensor 121, the second current sensor 122, the second current sensor 122, and the third current sensor 123, respectively, are connected to the first to third output lines of the first inverter 110 and the second inverter 210, It is possible to detect the current by installing it at the rear end of the reactor L for the first time. Each of the first current sensors 121 and 221, the second current sensors 122 and 222 and the third current sensors 123 and 223 provides a current detection value to the first parallel operation controller 140 and the second parallel operation controller 240 can do.

제1 전압검출부(130) 및 제2 전압검출부(230) 각각은 제1 인버터(110) 및 제2 인버터(210)로부터의 출력전압를 검출할 수 있다. 이를 위하여, 제1 전류검출부(120) 및 제2 전류검출부(220) 각각은 제1 전압센서(131,231), 제2 전압센서(132,232) 및 제3 전압센서(133,233)를 포함할 수 있다.Each of the first voltage detector 130 and the second voltage detector 230 can detect an output voltage from the first inverter 110 and the second inverter 210. [ The first current detector 120 and the second current detector 220 may include first voltage sensors 131 and 231, second voltage sensors 132 and 232, and third voltage sensors 133 and 233.

여기서, 제1 전압센서(131,231), 제2 전압센서(132,232) 및 제3 전압센서(133,233) 각각은 제1 인버터(110) 및 제2 인버터(210)의 제1 내지 제3 출력라인에서 병렬 설치된 필터용 커패시터(C)에 설치되어 전류를 검출할 수 있다. 또한, 제1 전압센서(131,231), 제2 전압센서(132,232) 및 제3 전압센서(133,233) 각각은 제1 병렬운전 제어부(140) 및 제2 병렬운전 제어부(240)에 전압검출값을 제공할 수 있다.Each of the first to third voltage sensors 131 and 231, the second voltage sensors 132 and 232 and the third voltage sensors 133 and 233 are connected in parallel to the first to third output lines of the first inverter 110 and the second inverter 210, It can be installed in the installed filter capacitor C to detect the current. Each of the first voltage sensors 131 and 231, the second voltage sensors 132 and 232 and the third voltage sensors 133 and 233 provides a voltage detection value to the first parallel operation controller 140 and the second parallel operation controller 240 can do.

제1 병렬운전 제어부(140)는 제1 드룹(Droop) 제어부(142) 및 제1 출력전압 제어부(144)를 포함할 수 있다.The first parallel operation control unit 140 may include a first droop control unit 142 and a first output voltage control unit 144.

제1 드룹(Droop) 제어부(142)는 제1 전류검출부(120) 및 제1 전압검출부(130) 각각으로부터 전류검출값 및 전압검출값을 수신하고, 수신한 전류검출값 및 전압검출값을 이용하여 출력주파수의 제어 지령치(

Figure pat00011
) 및 출력전압의 제어 지령치(
Figure pat00012
)를 연산할 수 있다. 또한, 제1 병렬운전 제어부(140)는 연산된 출력주파수의 제어 지령치(
Figure pat00013
) 및 출력전압의 제어 지령치(
Figure pat00014
)를 제1 출력전압 제어부(144)로 출력할 수 있다.The first droop control unit 142 receives the current detection value and the voltage detection value from the first current detection unit 120 and the first voltage detection unit 130 and uses the received current detection value and voltage detection value The output frequency control command value (
Figure pat00011
) And the output voltage control command value
Figure pat00012
) Can be calculated. In addition, the first parallel operation control unit 140 outputs a control command value
Figure pat00013
) And the output voltage control command value
Figure pat00014
Can be output to the first output voltage controller 144.

제2 병렬운전 제어부(240)는 제2 드룹(Droop) 제어부(242) 및 제2 출력전압 제어부(244)를 포함할 수 있다.The second parallel operation control unit 240 may include a second droop control unit 242 and a second output voltage control unit 244.

제2 드룹(Droop) 제어부(242)는 제2 전류검출부(220) 및 제2 전압검출부(230) 각각으로부터 전류검출값 및 전압검출값을 수신하고, 수신한 전류검출값 및 전압검출값을 이용하여 출력주파수의 제어 지령치(

Figure pat00015
) 및 출력전압의 제어 지령치(
Figure pat00016
)를 연산할 수 있다. 또한, 제2 병렬운전 제어부(240)는 연산된 출력주파수의 제어 지령치(
Figure pat00017
) 및 출력전압의 제어 지령치(
Figure pat00018
)를 제2 출력전압 제어부(244)로 출력할 수 있다.The second droop control unit 242 receives the current detection value and the voltage detection value from the second current detection unit 220 and the second voltage detection unit 230 and uses the received current detection value and voltage detection value The output frequency control command value (
Figure pat00015
) And the output voltage control command value
Figure pat00016
) Can be calculated. In addition, the second parallel operation control unit 240 outputs a control command value of the calculated output frequency (
Figure pat00017
) And the output voltage control command value
Figure pat00018
To the second output voltage control unit 244. [

여기서, 제1 드룹(Droop) 제어부(142) 및 제2 드룹(Droop) 제어부(242) 각각은 하기 수학식 3 및 4를 참조하여 출력주파수의 제어 지령치(

Figure pat00019
) 및 출력전압의 제어 지령치(
Figure pat00020
)를 연산할 수 있다.Here, the first droop control unit 142 and the second droop control unit 242 respectively calculate a control command value of the output frequency (refer to Equations 3 and 4)
Figure pat00019
) And the output voltage control command value
Figure pat00020
) Can be calculated.

[수학식 3]&Quot; (3) "

Figure pat00021
Figure pat00021

[수학식 4]&Quot; (4) "

Figure pat00022
Figure pat00022

여기서, 수학식 4는 수학식 2와 동일하다.Equation (4) is the same as Equation (2).

수학식 3 및 4에서

Figure pat00023
는 출력주파수의 제어 지령치,
Figure pat00024
은 APS의 정격 출력주파수,
Figure pat00025
은 출력전압의 제어 지령치,
Figure pat00026
은 출력전압의 최대값,
Figure pat00027
와
Figure pat00028
는 각각 유효전력과 무효전력에 따른 출력전압 및 주파수의 드룹(Droop),
Figure pat00029
는 인버터의 DC-link전압 변화에 따른 드룹(보상) 상수,
Figure pat00030
는 인버터의 DC-link의 전압변화량을 나타낼 수 있다. 여기서,
Figure pat00031
는 병렬 운전 구현 시 DC-link 전압이 설계치 대로 제어되지 않을 경우 조금씩 보상(변경)해가며 적정 설계치를 찾아가게 되는 상수값으로 설정될 수 있다.In equations (3) and (4)
Figure pat00023
Is a control command value of the output frequency,
Figure pat00024
Is the rated output frequency of the APS,
Figure pat00025
A control command value of the output voltage,
Figure pat00026
Is the maximum value of the output voltage,
Figure pat00027
Wow
Figure pat00028
(Droop) of output voltage and frequency according to active power and reactive power, respectively,
Figure pat00029
Is a drow (compensation) constant according to the DC-link voltage change of the inverter,
Figure pat00030
Can represent the voltage variation of the DC-link of the inverter. here,
Figure pat00031
Can be set to a constant value that compensates (changes) little by little when the DC-link voltage is not controlled according to the design value in the parallel operation implementation and searches the appropriate design value.

제1 출력전압 제어부(144) 및 제2 출력전압 제어부(244) 각각은 출력주파수의 제어 지령치(

Figure pat00032
) 및 출력전압의 제어 지령치(
Figure pat00033
)를 수신하여 제1 인버터(110) 및 제2 인버터(210)의 출력전압을 제어할 수 있다.Each of the first output voltage control unit 144 and the second output voltage control unit 244 includes a control command value
Figure pat00032
) And the output voltage control command value
Figure pat00033
And controls the output voltages of the first inverter 110 and the second inverter 210. [

이러한, 제1 병렬운전 제어부(140) 및 제2 병렬운전 제어부(240) 각각은 출력주파수의 정격으로부터 DC-link의 전압변화량만큼 위상이 지연된 3상 전압을 출력시키도록 제1 인버터(110) 및 제2 인터버(210)를 제어할 수 있다.The first parallel operation control unit 140 and the second parallel operation control unit 240 are connected to the first inverter 110 and the second parallel operation control unit 220 so as to output a three phase voltage delayed in phase by the voltage change amount of the DC- The second interface 210 can be controlled.

한편, 본 발명에 따른 실험 조건으로 2개의 보조전원장치 모듈을 병렬 연결하여 시험을 진행하면, 도 4에 도시된 출력전압 및 전류에 대한 파형을 확인할 수 있다.Meanwhile, when the test is performed by connecting two auxiliary power supply modules in parallel under the experimental conditions according to the present invention, the waveforms of the output voltage and the current shown in FIG. 4 can be confirmed.

여기서, 보조전원장치 모듈의 특성은 아래의 표 1과 같이 설정될 수 있다.Here, the characteristics of the auxiliary power supply module can be set as shown in Table 1 below.

[표 1][Table 1]

Figure pat00034
Figure pat00034

도 4는 제1 및 제2 보조전원장치 모듈의 병렬운전 수행 시 출력전압 및 전류에 대한 파형을 나타내며, 제1 보조전원장치 모듈이 먼저 동작한 후제2 보조전원장치 모듈이 스위칭 동작을 수행할 수 있다.FIG. 4 shows waveforms of the output voltage and the current during the parallel operation of the first and second auxiliary power supply modules, and the second auxiliary power supply module in which the first auxiliary power supply module first operates can perform the switching operation have.

따라서, 본 발명에서 제안된 드룹 제어기법을 적용할 경우 실험을 통하여 안정적으로 병렬운전을 수행하는 것을 확인할 수 있다.Therefore, when the droop control technique proposed in the present invention is applied, it can be confirmed that the parallel operation is performed stably through experiments.

본 발명은 출력주파수의 정격으로부터 인버터의 DC-link 의 전압변화량만큼 위상이 지연된 3상 전압을 출력시키도록 인버터를 제어하여 초기 과도 상태에서의 순환전류를 효과적으로 저감할 수 있다.The present invention can effectively reduce the circulating current in the initial transient state by controlling the inverter to output the three-phase voltage whose phase is delayed by the voltage change amount of the DC-link of the inverter from the output frequency rating.

이상에서 본 발명에 대한 기술 사상을 첨부 도면과 함께 서술하였지만, 이는 본 발명의 바람직한 실시예를 예시적으로 설명한 것이지 본 발명을 한정하는 것은 아니다. 또한, 이 기술 분야의 통상의 지식을 가진 자라면 누구나 본 발명의 기술 사상의 범주를 이탈하지 않는 범위 내에서 다양한 변형 및 모방이 가능함은 명백한 사실이다.Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. In addition, it is a matter of course that various modifications and variations are possible without departing from the scope of the technical idea of the present invention by anyone having ordinary skill in the art.

100,200: 보조전원장치
110,210: 인버터
120,220: 전류검출부
130,230: 전압검출부
140,240: 병렬운전 제어부100,200: Auxiliary power supply
110, 210: Inverter
120, 220:
130, 230:
140, 240: Parallel operation control unit

Claims (5)

철도차량의 제1 보조전원장치 및 제2 보조전원장치 각각에 구비되고, 병렬로 연결되어 철도차량의 부하에 3상 교류출력전압을 공급하는 제1 인버터 및 제2 인버터;
상기 제1 인버터 및 상기 제2 인버터 각각으로부터 출력되는 전류를 검출하는 제1 전류검출부 및 제2 전류검출부;
상기 제1 인버터 및 상기 제2 인버터 각각으로부터 출력되는 전압을 검출하는 제1 전압검출부 및 제2 전압검출부; 및
상기 제1 전류검출부 및 상기 제1 전압검출부 각각으로부터 전류검출값 및 전압검출값을 수신하고, 수신한 전류검출값 및 전압검출값을 이용하여 출력주파수의 제어 지령치 및 출력전압의 제어 지령치를 연산하며, 출력주파수의 정격으로부터 상기 제1 인버터 및 상기 제2 인버터 각각의 DC-link의 전압변화량만큼 위상이 지연된 3상 전압을 출력시키도록 상기 제1 인버터 및 상기 제2 인버터를 제어하는 제1 병렬운전 제어부 및 제2 병렬운전 제어부;
를 포함하는, 철도차량용 보조전원장치 교류출력전압 병렬운전 제어장치.
A first inverter and a second inverter provided in each of a first auxiliary power supply unit and a second auxiliary power supply unit of the railway vehicle and connected in parallel to supply a three-phase AC output voltage to the load of the railway vehicle;
A first current detector and a second current detector for detecting a current output from each of the first inverter and the second inverter;
A first voltage detecting unit and a second voltage detecting unit for detecting a voltage output from each of the first inverter and the second inverter; And
A current detection value and a voltage detection value from the first current detection unit and the first voltage detection unit, respectively, and calculates a control command value of the output frequency and a control command value of the output voltage using the received current detection value and the detected voltage value A first parallel operation for controlling the first inverter and the second inverter to output a three-phase voltage whose phase is delayed by a voltage change amount of the DC-link of each of the first inverter and the second inverter from the output frequency rating, A controller and a second parallel operation controller;
And an auxiliary power supply AC output voltage parallel operation controller for a railway vehicle.
제1항에 있어서,
상기 제1 병렬운전 제어부는, 상기 출력주파수의 제어 지령치 및 상기 출력전압의 제어 지령치를 연산하여 출력하는 제1 드룹 제어부, 및 상기 출력주파수의 제어 지령치 및 상기 출력전압의 제어 지령치를 수신하여 상기 제1 인버터의 출력전압을 제어하는 제1 출력전압 제어부를 포함하고,
상기 제2 병렬운전 제어부는, 상기 출력주파수의 제어 지령치 및 상기 출력전압의 제어 지령치를 연산하여 출력하는 제2 드룹 제어부, 및 상기 출력주파수의 제어 지령치 및 상기 출력전압의 제어 지령치를 수신하여 상기 제2 인버터의 출력전압을 제어하는 제2 출력전압 제어부를 포함하는, 철도차량용 보조전원장치 교류출력전압 병렬운전 제어장치.
The method according to claim 1,
Wherein the first parallel operation control unit comprises a first droop control unit for calculating and outputting a control command value of the output frequency and a control command value of the output voltage and a control unit for receiving the control command value of the output frequency and the control command value of the output voltage, And a first output voltage control unit for controlling an output voltage of the one inverter,
The second parallel operation control unit includes a second droop control unit for calculating and outputting a control command value of the output frequency and a control command value of the output voltage and a control unit for receiving the control command value of the output frequency and the control command value of the output voltage, And a second output voltage control unit for controlling an output voltage of the second inverter.
제2항에 있어서,
상기 제1 드룹 제어부 및 상기 제2 드룹 제어부 각각은,
수학식 1 [
Figure pat00035
] 및 수학식 2[
Figure pat00036
]를 이용하여 상기 출력주파수의 제어 지령치 및 상기 출력전압의 제어 지령치를 연산하는, 철도차량용 보조전원장치 교류출력전압 병렬운전 제어장치.
3. The method of claim 2,
Wherein each of the first droop control unit and the second droop control unit includes:
Equation 1 [
Figure pat00035
] And Equation 2 [
Figure pat00036
, The control command value of the output frequency and the control command value of the output voltage.
제1항에 있어서,
상기 제1 전류검출부 및 상기 제2 전류검출부 각각은, 필터용 리액터의 후단에 설치된 제1 전류센서, 제2 전류센서 및 제3 전류센서를 포함하는, 철도차량용 보조전원장치 교류출력전압 병렬운전 제어장치.
The method according to claim 1,
Wherein each of the first current detector and the second current detector includes a first current sensor, a second current sensor, and a third current sensor provided at a rear stage of the filter reactor, the auxiliary power supply AC output voltage parallel operation control Device.
제1항에 있어서,
상기 제1 전압검출부 및 상기 제2 전압검출부 각각은, 필터용 커패시터에 설치된 제1 전압센서, 제2 전압센서 및 제3 전압센서를 포함하는, 철도차량용 보조전원장치 교류출력전압 병렬운전 제어장치.

The method according to claim 1,
Wherein each of the first voltage detecting unit and the second voltage detecting unit includes a first voltage sensor, a second voltage sensor, and a third voltage sensor provided in a capacitor for a filter.

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