CN103078474A - Soft charging device for high-voltage frequency converter and control method thereof - Google Patents

Soft charging device for high-voltage frequency converter and control method thereof Download PDF

Info

Publication number
CN103078474A
CN103078474A CN2012105837812A CN201210583781A CN103078474A CN 103078474 A CN103078474 A CN 103078474A CN 2012105837812 A CN2012105837812 A CN 2012105837812A CN 201210583781 A CN201210583781 A CN 201210583781A CN 103078474 A CN103078474 A CN 103078474A
Authority
CN
China
Prior art keywords
soft charging
charging
soft
auxiliary winding
contactor
Prior art date
Application number
CN2012105837812A
Other languages
Chinese (zh)
Inventor
许杏桃
史明明
杨振宇
徐小康
孙开鹏
骆红梅
胡洁
Original Assignee
国家电网公司
江苏省电力公司
江苏省电力公司电力科学研究院
江苏安方电力科技有限公司
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 国家电网公司, 江苏省电力公司, 江苏省电力公司电力科学研究院, 江苏安方电力科技有限公司 filed Critical 国家电网公司
Priority to CN2012105837812A priority Critical patent/CN103078474A/en
Publication of CN103078474A publication Critical patent/CN103078474A/en

Links

Abstract

The invention discloses a soft charging device for a high-voltage frequency converter and a control method thereof. The soft charging device comprises a high-power charging resistor R, contactors KM1 and KM2 and a vacuum breaker K1 at a high-voltage alternating current input side. The method comprises the following steps of: firstly charging an auxiliary winding by virtue of the soft charging resistor, so as to charge each unit slowly; then after charging is finished, disconnecting the contactor at the auxiliary winding side; and finally performing switching-on operation on the vacuum breaker at the high-voltage input side. By utilizing the device and the method, less equipment is used; the operation is simple; the charging excitation surge current of the transformer is reduced while the unit soft charging device is simplified; and the application value is good.

Description

A kind of soft charging device and control method thereof for high voltage converter
Technical field
The present invention relates to electric and electronic technical field, refer more particularly to a kind of whole soft charging device for cascaded high-voltage frequency converter, also relate to a kind of control method of soft charging device.
Background technology
Along with the extensive use of high voltage converter at industrial circle, reliability to high voltage converter is had higher requirement, the high voltage converter of present stage adds soft charge circuit at unit, number of devices and cost have been increased on the one hand, on the other hand also so that the reduction of the reliability of high voltage converter.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of soft charging device for high voltage converter, this apparatus structure is simple, control is convenient, eliminate the hidden danger that affects reliability that a large amount of soft charging device of unit brings, a kind of control method of soft charging device of high voltage converter also is provided.
In order to solve the problems of the technologies described above, the invention provides a kind of soft charging device for high voltage converter, this soft charging device comprises contactor KM1, KM2, the vacuum circuit-breaker K1 of soft charging resistor R and high input voltage side, described contactor KM1, KM2 and soft charging resistor R one end are provided with the auxiliary winding of multi winding transformer, and described contactor KM1, KM2 and soft charging resistor R are by the auxiliary winding of series connection with 380V alternating current access multi winding transformer.
A kind of control method of soft charging device, the method may further comprise the steps.
Step 1: in the situation that confirm high-pressure vacuum breaker K1 separating brake, splice grafting tentaculum KM1 and KM2 slowly charge to power cell by auxiliary winding.
Step 2: wait for that the direct voltage of power cell reaches the rated value of 50%-80%, separating brake KM1 and KM2.
Step 3: in the situation that confirm KM1 and KM2 separating brake, combined floodgate vacuum circuit-breaker K1.
Compared with prior art, the present invention has following advantages.
(1) this soft charging device comprises contactor KM1, KM2, the vacuum circuit-breaker K1 of high-power soft charging resistor R and high input voltage side; This device is simple and convenient, need not to configure the soft charge circuit of each unit, has reduced device, reduces cost, has also improved the reliability of device.
(2) described contactor KM1, KM2 and high-power soft charging resistor R are by the auxiliary winding of series connection with 380V alternating current access multi winding transformer; To the soft charging in unit the time, also reduced the magnetizing inrush current that produces when the high-pressure side vacuum circuit-breaker closes a floodgate by auxiliary winding.
(3) adopt whole soft charging device, so that soft charging link simplifies greatly, thereby improved the operational reliability of high voltage converter.
Description of drawings
Fig. 1 is the physical circuit of the soft charging device of the present invention in high voltage converter.
Fig. 2 is the flow chart of the soft charging device control method of the present invention.
Embodiment
As shown in Figure 1, this soft charging device comprises contactor KM1, the KM2 of auxiliary winding side, soft charging resistor R and on high-tension side vacuum circuit-breaker K1, contactor KM1, KM2 and soft charging resistor R one end are provided with the auxiliary winding of multi winding transformer, contactor KM1, KM2 and the soft charging resistor of auxiliary winding side are connected in series, and the 380V alternating current is introduced auxiliary winding.
As shown in Figure 2, whole soft charging device has adopted effective control method, and its step is as follows.
Step 1: in the situation that confirm high-pressure vacuum breaker K1 separating brake, splice grafting tentaculum KM1 and KM2 wait for 20 second time, slowly charge to power cell by auxiliary winding, if break down, are provided with alarm and will send warning.
Step 2: the direct voltage of waiting for power cell reaches 60% rated value, and separating brake KM1 and KM2 if break down, are provided with alarm and will send warning.
Step 3: in the situation that confirm KM1 and KM2 separating brake, combined floodgate vacuum circuit-breaker K1 if break down, is provided with alarm and will sends warning.
At first power on for auxiliary winding by soft charging resistor R, slowly charge for again each unit, after each unit charging is finished, disconnect contactor KM1, the KM2 of auxiliary winding side, last, the vacuum circuit-breaker K1 of high input voltage side is carried out closing operation.

Claims (2)

1. soft charging device that is used for high voltage converter, it is characterized in that: it comprises contactor KM1, KM2, the vacuum circuit-breaker K1 of soft charging resistor R and high input voltage side, described contactor KM1, KM2 and soft charging resistor R one end are provided with the auxiliary winding of multi winding transformer, and described contactor KM1, KM2 and soft charging resistor R are by the auxiliary winding of series connection with 380V alternating current access multi winding transformer.
2. control method that realizes soft charging device claimed in claim 1 is characterized in that:
The method may further comprise the steps:
Step 1: in the situation that confirm high-pressure vacuum breaker K1 separating brake, splice grafting tentaculum KM1 and KM2 slowly charge to power cell by auxiliary winding;
Step 2: wait for that the direct voltage of power cell reaches the rated value of 50%-80%, separating brake KM1 and KM2;
Step 3: in the situation that confirm KM1 and KM2 separating brake, combined floodgate vacuum circuit-breaker K1.
CN2012105837812A 2012-12-31 2012-12-31 Soft charging device for high-voltage frequency converter and control method thereof CN103078474A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012105837812A CN103078474A (en) 2012-12-31 2012-12-31 Soft charging device for high-voltage frequency converter and control method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012105837812A CN103078474A (en) 2012-12-31 2012-12-31 Soft charging device for high-voltage frequency converter and control method thereof

Publications (1)

Publication Number Publication Date
CN103078474A true CN103078474A (en) 2013-05-01

Family

ID=48154911

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012105837812A CN103078474A (en) 2012-12-31 2012-12-31 Soft charging device for high-voltage frequency converter and control method thereof

Country Status (1)

Country Link
CN (1) CN103078474A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104811050A (en) * 2015-04-13 2015-07-29 广东明阳龙源电力电子有限公司 High-voltage frequency converter with centralized charged power units

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201523337U (en) * 2009-10-30 2010-07-07 湖南中科电气股份有限公司 High-voltage high-power frequency converter by using low-voltage power to pre-charge
CN101860232A (en) * 2010-03-29 2010-10-13 北京利德华福电气技术有限公司 Resonant type pre-charging circuit for high-voltage frequency converter and control method thereof
CN201682423U (en) * 2010-03-29 2010-12-22 北京利德华福电气技术有限公司 Resonant-type precharge circuit for high-voltage frequency converter
CN202019306U (en) * 2011-03-18 2011-10-26 北京国电四维清洁能源技术有限公司 Pre-charge circuit and high-voltage frequency converter comprising same
CN203014657U (en) * 2012-12-31 2013-06-19 国家电网公司 Soft charging device used for high voltage frequency converter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201523337U (en) * 2009-10-30 2010-07-07 湖南中科电气股份有限公司 High-voltage high-power frequency converter by using low-voltage power to pre-charge
CN101860232A (en) * 2010-03-29 2010-10-13 北京利德华福电气技术有限公司 Resonant type pre-charging circuit for high-voltage frequency converter and control method thereof
CN201682423U (en) * 2010-03-29 2010-12-22 北京利德华福电气技术有限公司 Resonant-type precharge circuit for high-voltage frequency converter
CN202019306U (en) * 2011-03-18 2011-10-26 北京国电四维清洁能源技术有限公司 Pre-charge circuit and high-voltage frequency converter comprising same
CN203014657U (en) * 2012-12-31 2013-06-19 国家电网公司 Soft charging device used for high voltage frequency converter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104811050A (en) * 2015-04-13 2015-07-29 广东明阳龙源电力电子有限公司 High-voltage frequency converter with centralized charged power units

Similar Documents

Publication Publication Date Title
CN106646206B (en) The dc circuit breaker compounding testing circuit and method of the compound injection of high-voltage large current
CN103023000B (en) Grid current limiting device and grid current limiting device and grid current limiting system
EP3267460B1 (en) Direct-current interruption device
US20120187089A1 (en) High-voltage, super-voltage and heavy current breaker
CN103337852B (en) A kind of direct current network breaking device
CN103181048A (en) Voltage balancing of symmetric hvdc monopole transmission lines after earth faults
CN201629677U (en) Pre-charging circuit for high-voltage frequency converter using high-voltage technology
CN201656760U (en) Surge-prevention soft starting circuit
CN103647458B (en) Frequency conversion system and carry out the method and apparatus of precharge to the high voltage converter in it
CN205921399U (en) Transformer combined floodgate control system
CN104158282A (en) Dual-circuit switching control power circuit and high-voltage inverter
CN105409079A (en) Current-limiting reactor device
CN101557096A (en) Voltage transformer excitation surge current free idle-loaded switching-on controller
CN102222893A (en) Quick fault current restrictor based on carrier isolator
CN101741095A (en) Automatic switching device for economic operation of power transformer
EP3343715A1 (en) Short-circuit failure current limiter
CN105703324A (en) Current transfer type high-voltage direct-current circuit breaker
CN102005994A (en) Same-phase switching circuit and actuating device of rare-earth permanent magnet synchronous electric motor
CN103840470B (en) A kind of breaker closing phase control method, Apparatus and system
CN201732648U (en) Transformer pre-magnetizing device
CN201298065Y (en) An experiment loop for switching super/extra-high voltage circuit breaker capacitive load
CN103050254A (en) Single-phase low-voltage double-split transformer with functions of dual high voltage and off-circuit voltage regulation
CN202373970U (en) Variable-impedance autotransformer type fault current limiter
CN203180518U (en) Intelligent switch arc-extinguishing and overvoltage-protecting device
CN201364372Y (en) Wire connection device and polarity test system and transformation ratio test system comprising same

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20130501