KR100863458B1 - Output test device of dc regenerative inverter using ac system interconnection transformer - Google Patents

Output test device of dc regenerative inverter using ac system interconnection transformer Download PDF

Info

Publication number
KR100863458B1
KR100863458B1 KR1020070046314A KR20070046314A KR100863458B1 KR 100863458 B1 KR100863458 B1 KR 100863458B1 KR 1020070046314 A KR1020070046314 A KR 1020070046314A KR 20070046314 A KR20070046314 A KR 20070046314A KR 100863458 B1 KR100863458 B1 KR 100863458B1
Authority
KR
South Korea
Prior art keywords
rectifier
regenerative inverter
voltage
transformer
output
Prior art date
Application number
KR1020070046314A
Other languages
Korean (ko)
Inventor
김용기
한문섭
김주락
배창한
양영철
박종필
Original Assignee
한국철도기술연구원
시엔에이전기 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 한국철도기술연구원, 시엔에이전기 주식회사 filed Critical 한국철도기술연구원
Priority to KR1020070046314A priority Critical patent/KR100863458B1/en
Application granted granted Critical
Publication of KR100863458B1 publication Critical patent/KR100863458B1/en

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/40—Testing power supplies
    • G01R31/42—AC power supplies
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • 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
    • H02M1/12—Arrangements for reducing harmonics from ac input or output
    • 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

Abstract

An output test device of a DC regenerative inverter using an AC system interconnection transformer is provided to remarkably reduce capacity of AC power equipment required for an output test by using the AC system interconnection transformer. An AC power supply(21) supplies power to a test device. A rectifier transformer(22) is connected to an output terminal of the AC power supply to transform voltage of the AC power supply into voltage inputted to a DC regenerative inverter(24). A DC rectifier(23) is connected to an output terminal of the rectifier transformer to rectify voltage of a secondary side of the rectifier transformer into DC voltage. The DC regenerative inverter is connected to an output terminal of the DC rectifier to transform output voltage of the DC rectifier into AC voltage. A system interconnection transformer(25) is connected between an AC output terminal of the DC regenerative inverter and an input terminal of the rectifier transformer to transform output voltage of the DC generative inverter into the voltage of the AC power supply.

Description

ＡＣ계통 연계 변압기를 사용한 ＤＣ회생 인버터 출력시험장치{Output test device of DC regenerative inverter using AC system interconnection transformer}DC regenerative inverter using AC system interconnection transformer

도 1은 종래 DC회생인버터 출력시험장치의 구성도,1 is a configuration diagram of a conventional DC regenerative inverter output test device,

도 2는 본 발명의 바람직한 일실시예에 대한 구성도를 나타낸다.Figure 2 shows a block diagram of a preferred embodiment of the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

11,21 -- 교류전원, 12,22 -- 정류기용 변압기.11,21-AC power, 12,22-Rectifier transformer.

13,23 -- DC정류기, 14,24 -- DC회생인버터,13,23-DC rectifier, 14,24-DC regenerative inverter,

25 -- 계통연계용 변압기, S1~S3 -- 부하개폐기,25-grid-connected transformer, S1-S3-load breaker,

LD1~LD3 -- 부하저항기.LD1 ~ LD3-load resistors.

본 발명은 회생인버터 부하시험장치에 관한 것으로, 특히 대용량 회생인버터의 출력시험에 적합하도록 AC(교류)계통 연계 변압기를 사용하여 출력시험에 필요 한 교류 전원설비의 용량을 획기적으로 80% 이상 절감시킬 수 있도록 하는 AC계통 연계 변압기를 사용한 DC회생인버터 출력시험장치에 관한 것이다.The present invention relates to a regenerative inverter load test apparatus, and in particular, by using an AC (AC) system linked transformer suitable for the output test of a large-capacity regenerative inverter, the capacity of the AC power equipment required for the output test can be drastically reduced by more than 80%. The present invention relates to a DC regenerative inverter output test apparatus using an AC system linked transformer.

일반적으로, DC회생인버터는 입력을 직류전압으로 하며, 일정 전압 이상이 인가되면 인버터로 동작하여 직류를 교류로 변환하는 장치로, 직류 전철 계통에서 전동차가 감속시 발생하는 잉여 직류 전력을 교류로 변환하여 변환된 교류전력을 구내의 동력설비 및 전동설비에 공급하여 전기에너지를 절감하는 설비이다.In general, the DC regenerative inverter is a DC voltage input, and when a predetermined voltage or more is applied, the DC regenerative inverter is a device that converts the DC to AC by converting the excess DC power generated when the electric vehicle decelerates in the DC train system to AC. It is a facility that saves electrical energy by supplying the converted AC power to the power equipment and power equipment in the premises.

종래에는 이와 같은 DC회생인버터를 시험하기 위하여, 예컨대 1000㎾용량의 DC회생인버터를 시험하기 위해서는 1200㎾정도의 교류전원설비를 이용하여 상기 교류전원설비에서 공급되는 교류전압을 정류기를 사용하여 DC전압으로 변환한 후에 DC회생인버터로 입력하고, DC회생인버터에서 교류로 변환된 출력측에 저항기 등의 부하를 설치하여 시험하였다.Conventionally, in order to test such a DC regenerative inverter, for example, to test a DC regenerative inverter having a capacity of 1000 kW, an AC power supply of about 1200 kW is used, and the DC voltage supplied from the AC power supply facility is rectified using a rectifier. After the conversion, the input was input to a DC regenerative inverter, and a load such as a resistor was installed on the output side converted from the DC regenerative inverter to alternating current.

도 1은 종래의 DC회생인버터 출력시험장치의 구성도를 도시한 것으로, 교류전원(11)에는 정류기용 변압기(12)와 DC정류기(13) 그리고 DC회생인버터(14)가 차례로 연결되고, 상기 DC회생인버터(14)의 AC출력단에 다수의 부하개폐기(S1~S3)가 병렬로 연결됨과 아울러 각 부하개폐기(S1~S3)에 부하저항기(LD1~LD3)가 각각 연결된 구조로 되어 있다.1 is a block diagram of a conventional DC regenerative inverter output test apparatus, the rectifier transformer 12, the DC rectifier 13 and the DC regenerative inverter 14 are sequentially connected to the AC power source 11, A plurality of load switch (S1 ~ S3) is connected in parallel to the AC output terminal of the DC regenerative inverter 14, and load resistors (LD1 ~ LD3) are connected to each load switch (S1 ~ S3), respectively.

이와 같은 종래 시험설비에서 교류전원(11)은 DC회생인버터(14) 용량의 120%가 되는 것을 사용한다. 여기서, 정류기용 변압기(12)는 교류전원전압을 DC회생인버터(14)에 입력가능한 전압으로 변성하는 작용을 하는 것이고, DC정류기(13)는 정류기용 변압기(12)의 2차측 교류전압을 직류전압으로 정류하는 작용을 하는 것이며, 부하개폐기(S1~S3)는 후단에 연결되어 있는 부하저항기(LD1~LD3)를 연결 또는 차단하는 작용을 한다. 또한 부하저항기(LD1~LD3)는 DC회생인버터(14)에서 발생한 교류전력을 소비하는 작용을 하며, DC회생인버터(14)는 DC정류기(13)의 직류전압을 교류전압으로 변환하는 작용을 한다.
상기 DC회생인버터(14)는 IGBT 등의 스위칭소자로 이루어지는 전력변환부가 연결되어 있다. 상기 전력변환부는 D축성분(유효전력 제어)과 Q축성분(무효전력 제어)의 전류값을 제어하는 PI 제어부인 D/Q축 전류제어기의 일측 출력단에는 3상 좌표계를 2상 좌표계(D축, Q축)로 변경 또는 2상 좌표계를 3상 좌표계로 변경하는 좌표변환 및 상변환부와 기준신호를 스위칭 펄스형태로 변환시키는 PWM 발생회로 및 전력변환부를 구성하는 스위칭 소자의 게이팅을 ON/OFF하는 게이트구동회로가 차례로 연결되어 있다.(도시하지는 않음)
그리하여 교류전원(11)측에서 공급되는 교류전력은 정류기용 변압기(12)를 통하여 DC정류기(13)로 공급되며, DC정류기(13)의 전압조정기능을 이용하여 DC회생인버터(14)의 동작개시전압 이상으로 조정한 후 부하개폐기(LD1), 부하개폐기(LD2), 부하개폐기(LD3)를 차례로 투입시켜 출력시험을 하게 된다. In such a conventional test facility, the AC power source 11 uses 120% of the DC regenerative inverter 14 capacity. Here, the rectifier transformer 12 acts to convert the AC power supply voltage into a voltage that can be input to the DC regenerative inverter 14, and the DC rectifier 13 directs the secondary AC voltage of the rectifier transformer 12 to DC. It is to act as a rectifying voltage, the load switch (S1 ~ S3) is to connect or cut off the load resistors (LD1 ~ LD3) connected to the rear end. In addition, the load resistors LD1 to LD3 consume AC power generated by the DC regenerative inverter 14, and the DC regenerative inverter 14 converts the DC voltage of the DC rectifier 13 into an AC voltage. .
The DC regenerative inverter 14 is connected to a power conversion unit made of a switching element such as IGBT. The power converter has a three-phase coordinate system (D-axis) at one output terminal of the D / Q-axis current controller, which is a PI controller that controls the current values of the D-axis component (effective power control) and the Q-axis component (reactive power control). , Q-axis) or two-phase coordinate system to three-phase coordinate system, the PWM conversion circuit for converting the phase conversion unit and the reference signal in the form of a switching pulse, and switching the gating of the switching elements constituting the power conversion unit Gate driving circuits are connected in sequence (not shown).
Thus, the AC power supplied from the AC power source 11 is supplied to the DC rectifier 13 through the rectifier transformer 12, and the DC regenerative inverter 14 is operated by using the voltage regulating function of the DC rectifier 13. After adjusting above start voltage, load switch (LD1), load switch (LD2), load switch (LD3) are put in order and output test is done.

그런데, 이와 같은 종래의 시험장치는 DC회생인버터(14)에서 변환된 AC출력이 부하저항기(LD1~LD3)를 통하여 열로 소비되어 없어지므로, 시험시 전기에너지의 손실이 많으며, 특히 용량이 큰 DC회생인버터(14)의 출력시험을 위하여는 그 크기의 120% 되는 AC전원설비가 필요하다. However, in the conventional test apparatus as described above, since the AC output converted from the DC regenerative inverter 14 is consumed as heat through the load resistors LD1 to LD3, a large amount of electric energy is lost during the test, in particular, a large DC For the output test of regenerative inverter 14, AC power supply of 120% of the size is required.

본 발명은 종래의 시험장치가 갖는 큰 용량의 AC전원설비와 시험시 소모되는 전력이 많은 문제점을 해소하기 위한 것으로, DC회생인버터가 변환한 AC전력을 AC계통 연계 변압기를 사용하여 교류전원설비와 계통연계 즉 다시 DC정류기로 피드백 입력시킴으로써 AC전원측에서는 DC회생인버터의 자체 손실분의 전력만을 공급할 수 있도록 됨으로써 저용량의 AC 전원설비를 사용할 수 있도록 되어 있다. 따라서 열 로 소비되는 부하 저항기의 사용없이 전력손실을 최소화시킴으로써 AC전원설비를 사용하여 출력시험이 가능하여 시설비의 대폭 절감 및 시험시 발생하는 전기요금을 획기적으로 감소시킬 수 있게 되어, DC회생인버터를 효율적으로 시험할 수 있도록 된 AC계통 연계 변압기를 사용한 DC회생인버터 출력시험장치를 제공하고자 함에 발명의 목적이 있다.The present invention is to solve the problem of a large capacity AC power equipment and a lot of power consumed during the test of the conventional test device, the AC power converted by the DC regenerative inverter using the AC system link transformer and the AC power equipment The feedback from the grid connection, that is, back to the DC rectifier, allows the AC power supply to supply only the power of the DC regenerative inverter's own losses, enabling the use of low-capacity AC power supplies. Therefore, by minimizing the power loss without using the load resistor consumed by heat, the output test can be performed by using the AC power equipment, which can greatly reduce the facility cost and drastically reduce the electric charges incurred during the test. An object of the present invention is to provide a DC regenerative inverter output test apparatus using an AC system linked transformer that can be efficiently tested.

상기한 목적을 실현하기 위한 본 발명의 ＡＣ계통 연계 변압기를 사용한 ＤＣ회생 인버터 출력시험장치는, 교류전원에 정류기용 변압기와 DC정류기 그리고 DC회생인버터가 차례로 연결되고, 상기 DC회생인버터의 AC출력단과 정류기용 변압기의 입력단 사이에 계통연계용 변압기를 연결시켜, DC회생인버터의 출력이 계통연계용 변압기를 매개로 다시 DC회생인버터의 입력으로 피드백되도록 이루어진 것을 특징으로 한다.In the DC regenerative inverter output test apparatus using the AC system linked transformer of the present invention for realizing the above object, a rectifier transformer, a DC rectifier, and a DC regenerative inverter are sequentially connected to an AC power source, and the AC output terminal of the DC regenerative inverter The grid-connected transformer is connected between the input terminals of the rectifier transformer, so that the output of the DC regenerative inverter is fed back to the input of the DC regenerative inverter via the grid-connected transformer.

상기 교류전원은 DC회생인버터 용량의 10~20%의 용량을 갖는 것을 특징으로 한다.The AC power source is characterized in that it has a capacity of 10 to 20% of the DC regenerative inverter capacity.

이하 본 발명의 바람직한 일실시예에 대한 구성 및 작용을 예시도면에 의거하여 상세히 설명한다.Hereinafter, the configuration and operation of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명의 구성도를 나타낸다.2 shows a block diagram of the present invention.

본 발명에서 사용되는 교류전원(21)은 DC회생인버터(24) 용량의 10~20%의 용 량의 것을 사용한다. 이는 종래에 DC회생인버터 용량의 120%의 교류전원을 사용하던 것과 달리 후술되는 바와 같이 DC회생인버터(24)의 출력측에 저항기 등의 부하를 사용하지 않음에 따라 전력손실이 획기적으로 줄어들기 때문이다. AC power source 21 used in the present invention uses a capacity of 10 to 20% of the DC regenerative inverter 24 capacity. This is because, unlike the conventional AC power supply of 120% of the DC regenerative inverter capacity, the power loss is drastically reduced by not using a load such as a resistor on the output side of the DC regenerative inverter 24 as described below. .

한편, 본 발명에 따른 정류기용 변압기(22)와 DC정류기(23) 및 DC회생인버터(24)는 도 1에 도시된 정류기용 변압기(12)와 DC정류기(13) 및 DC회생인버터(14)와 동일한 작용을 수행하는 것으로, 정류기용 변압기(22)는 교류전원(21) 전압을 DC회생인버터(24)의 입력가능 전압으로 변성하고, DC정류기(23)는 정류기용 변압기(22)의 2차측 교류전압을 직류전압으로 정류하며, DC회생인버터(24)는 DC정류기(23)의 출력전압을 교류전압으로 변환하는 작용을 한다.Meanwhile, the rectifier transformer 22, the DC rectifier 23, and the DC regenerative inverter 24 according to the present invention are the rectifier transformer 12, the DC rectifier 13, and the DC regenerative inverter 14 shown in FIG. 1. In the same operation as that, the rectifier transformer 22 converts the AC power supply 21 voltage into an input voltage of the DC regenerative inverter 24, and the DC rectifier 23 is set to 2 of the rectifier transformer 22. The secondary AC voltage is rectified to a DC voltage, and the DC regenerative inverter 24 functions to convert the output voltage of the DC rectifier 23 into an AC voltage.

즉, 교류전원(21)측에서 출력된 교류전원은 정류기용 변압기(22)에 의하여 후단의 DC회생인버터(24)에서 동작가능한 전압으로 변성되어 DC정류기(23)로 공급된다.That is, the AC power output from the AC power supply 21 side is converted into a voltage operable by the DC regenerative inverter 24 at the rear stage by the rectifier transformer 22 and supplied to the DC rectifier 23.

DC정류기(23)는 정류기용 변압기(22)의 2차측으로부터 인가되는 전압을 직류전압으로 정류하여 DC회생인버터(24)로 공급한다. The DC rectifier 23 rectifies the voltage applied from the secondary side of the rectifier transformer 22 to a DC voltage and supplies it to the DC regenerative inverter 24.

이에 따라 DC회생인버터(24)는 동작을 개시하여 전력변환부의 제어신호를 기준으로 입력된 직류전압을 일정한 전압, 주파수 및 위상을 동기화한 교류출력을 계통연계용 변압기(25)의 1차측에 공급한다. 계통연계용 변압기(25)는 1차측에 공급된 DC회생인버터(24)의 교류출력을 교류전원(21)의 출력단에 연결하기 위하여 교류전원전압으로 변성한다. 따라서 계통연계용 변압기(25)의 2차 출력이 정류기용 변압기(22)로 공급함으로써 다시 DC회생인버터(24)로 공급될 수 있도록 하고 있다.Accordingly, the DC regenerative inverter 24 starts operation and supplies the DC voltage input based on the control signal of the power converter to the primary side of the grid-connected transformer 25 by synchronizing a constant voltage, frequency, and phase. do. The grid-connected transformer 25 converts the AC output of the DC regenerative inverter 24 supplied to the primary side into an AC power supply voltage to connect to the output terminal of the AC power source 21. Therefore, the secondary output of the grid-connected transformer 25 is supplied to the rectifier transformer 22 to be supplied to the DC regenerative inverter 24 again.

이때 교류전원(21)측은 자체 DC회생인버터(24), 정류기용 변압기(22) 및 계통연계용 변압기(25), DC정류기(23) 등의 손실만큼 공급하게 되며, DC회생인버터(24)는 자기가 변환한 교류출력을 계통연계 변압기(25)→정류기용 변압기(22)→ DC정류기(23)→DC회생인버터(24) 입력의 순으로 순환하게 되어 DC회생인버터(24)의 출력시험이 지속적으로 가능하게 된다.At this time, the AC power supply 21 side supplies the loss of its own DC regenerative inverter 24, rectifier transformer 22 and grid-connected transformer 25, DC rectifier 23, etc., DC regenerative inverter 24 is The self-converted AC output is circulated in the order of the grid-connected transformer (25) → rectifier transformer (22) → DC rectifier (23) → DC regenerative inverter (24), and the output test of the DC regenerative inverter (24) is performed. It is possible continuously.

본 발명은 DC회생인버터에서 변환한 AC출력을 계통연계 변압기를 통하여 다시 정류용 변압기, DC정류기를 통하여 DC회생인버터로 공급하게 구성한 것으로 DC회생인버터로 입력된 직류전압은 자체 변환손실을 제외한 전부가 AC전력으로 변환되어 다시 피드백되어 입력되어지므로 전력에너지가 AC→DC→AC로 순환되어 부하 저항기 같은 부하없이도 출력시험이 가능하며, AC전원설비는 시험설비와 DC회생인버터의 손실분만 공급하면 되므로 종래의 전원설비용량의 10~20%로 시험이 가능하여 AC전원설비비를 대폭적으로 절감시킬 수 있는 장점이 있다. The present invention is configured to supply the AC output converted from the DC regenerative inverter back to the rectifier transformer, DC rectifier through the grid-connected transformer, the DC regenerative inverter. Since it is converted into AC power and fed back, it is inputted again, so the power energy is circulated from AC to DC to AC so that the output test can be performed without a load such as a load resistor, and the AC power equipment only needs to supply the loss of the test equipment and the DC regenerative inverter. It is possible to test with 10 ~ 20% of the capacity of power supply, which has the advantage of greatly reducing the cost of AC power supply.

Claims (2)

시험장치에 전원을 공급하는 교류전원, 상기 교류전원의 출력단에 연결되어 상기 교류전원전압을 DC회생인버터의 입력이 가능하도록 변성하는 정류기용 변압기, 상기 정류기용 변압기의 출력단에 연결되어 상기 정류기용 변압기의 2차측 전압을 DC전압으로 정류하는 DC정류기, 상기 DC정류기의 출력단에 연결되어 DC정류기 출력전압을 AC전압으로 변환하는 DC회생인버터 및 상기 DC회생인버터의 AC출력단과 정류기용 변압기의 입력단 사이에 연결되며, DC회생인버터의 출력전압을 교류전원전압으로 변성하여 피드백 하는 계통연계용 변압기를 포함하여 구성되어지는 것을 특징으로 하는 AC계통 연계 변압기를 사용한 DC회생인버터 출력시험장치.AC power supplying power to a test apparatus, a rectifier transformer connected to an output terminal of the AC power and converting the AC power voltage to enable input of a DC regenerative inverter, and connected to an output terminal of the rectifier transformer. A DC rectifier for rectifying the secondary voltage of the DC rectifier, a DC regenerative inverter connected to the output terminal of the DC rectifier and converting the DC rectifier output voltage to an AC voltage, and between an AC output terminal of the DC regenerative inverter and an input terminal of the rectifier transformer. A DC regenerative inverter output test apparatus using an AC system-linked transformer, comprising: a grid-connected transformer connected to the DC regenerative inverter and converting the output voltage of the DC regenerative inverter into an AC power supply voltage. 삭제delete
KR1020070046314A 2007-05-14 2007-05-14 Output test device of dc regenerative inverter using ac system interconnection transformer KR100863458B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070046314A KR100863458B1 (en) 2007-05-14 2007-05-14 Output test device of dc regenerative inverter using ac system interconnection transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070046314A KR100863458B1 (en) 2007-05-14 2007-05-14 Output test device of dc regenerative inverter using ac system interconnection transformer

Publications (1)

Publication Number Publication Date
KR100863458B1 true KR100863458B1 (en) 2008-10-16

Family

ID=40177101

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020070046314A KR100863458B1 (en) 2007-05-14 2007-05-14 Output test device of dc regenerative inverter using ac system interconnection transformer

Country Status (1)

Country Link
KR (1) KR100863458B1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010054484A (en) * 1999-12-07 2001-07-02 안우희 Inverter test equipment of raiway traction
KR100400068B1 (en) * 2003-02-21 2003-09-29 Bong Taek Kim Performance test equipment system of train driving device and test method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010054484A (en) * 1999-12-07 2001-07-02 안우희 Inverter test equipment of raiway traction
KR100400068B1 (en) * 2003-02-21 2003-09-29 Bong Taek Kim Performance test equipment system of train driving device and test method thereof

Similar Documents

Publication Publication Date Title
US7710752B2 (en) Transformerless utility-grid-interactive inverter
EP2737605B1 (en) Dual boost converter for ups system
CN100533166C (en) Current converter test circuit
US20080013352A1 (en) Active rectifier system with power factor correction
JP2008022625A (en) Ac-dc converter
US9270192B2 (en) Variable speed drive provided with a supercapacitor module
CN101071163B (en) Current converter test circuit
RU2375804C2 (en) Ship electric power system
CN103608996A (en) Uninterruptible power supply system
EP2120320B1 (en) Dc power supply device
RU2540966C1 (en) Static converter
JP5963197B2 (en) AC / AC bidirectional power converter
CN113452277A (en) Power module for pulse power generation device and pulse power generation device
CN112825427A (en) Device for effective network-independent intermediate circuit conditioning
JP2010110056A (en) Power distribution system
KR100863458B1 (en) Output test device of dc regenerative inverter using ac system interconnection transformer
US20200153271A1 (en) Integrated Power Supply System for Auxiliary Services for Power Converters
Linn et al. Performance analysis of high frequency isolated AC/DC converter based on matrix converter
KR20160054769A (en) Test equipment of converter
KR100689325B1 (en) H-bridge multi-level inverter
JP2000241477A (en) Operation method for direct current power supply device to be tested
CN111987919A (en) Power converter
KR100850261B1 (en) Apparatus for changing switch of electrical welding machine
RU2557100C2 (en) Power conversion system and method of its operation
CN216774634U (en) Bidirectional high-voltage direct-current device and test equipment

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20130108

Year of fee payment: 6

FPAY Annual fee payment

Payment date: 20140424

Year of fee payment: 7

FPAY Annual fee payment

Payment date: 20150727

Year of fee payment: 8

FPAY Annual fee payment

Payment date: 20160727

Year of fee payment: 9

FPAY Annual fee payment

Payment date: 20170821

Year of fee payment: 10

FPAY Annual fee payment

Payment date: 20180809

Year of fee payment: 11

FPAY Annual fee payment

Payment date: 20190725

Year of fee payment: 12