CN201041956Y - Power supply circuit for control circuit in high voltage device - Google Patents

Power supply circuit for control circuit in high voltage device Download PDF

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Publication number
CN201041956Y
CN201041956Y CNU2007200668992U CN200720066899U CN201041956Y CN 201041956 Y CN201041956 Y CN 201041956Y CN U2007200668992 U CNU2007200668992 U CN U2007200668992U CN 200720066899 U CN200720066899 U CN 200720066899U CN 201041956 Y CN201041956 Y CN 201041956Y
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China
Prior art keywords
control loop
power supply
converter
links
transformer
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Expired - Lifetime
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CNU2007200668992U
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Chinese (zh)
Inventor
竺伟
柳毛继
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Shanghai Autowell Power Electronics Co., Ltd.
Shanghai Guangdian Electric Group Co Ltd
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SHANGHAI IPER ELECTRIC POWER ELECTRONICS Co Ltd
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Abstract

The utility model relates to the feed circuit of the control circuit in a high-voltage device, and the device comprises an external low-voltage power supply. The external low-voltage power supply is connected with the control circuit through an AC/DC transformer and a diode in turn. The secondary winding of a transformer is connected with the control circuit through another AC/DC transformer and another diode in turn. The utility model solves the problem that the power supply mode of the control circuit in the prior high-voltage device has a high cost as well as low reliability.

Description

The power supply circuits of control loop in a kind of high-pressure installation
Technical field
The utility model relates to the power supply circuits of control loop in a kind of high-pressure installation.
Background technology
High-pressure installation, general main circuit voltage comprises high-tension switch cabinet, high pressure soft starting device, high voltage converter, high-voltage rectifying device, high pressure active filter etc. for exchanging 1KV~35KV.
Existing high-pressure installation needs the user that high pressure main power source (as three-phase alternating current 6KV) and outer low pressure power supply (as single phase alternating current (A.C.) 220V) are provided respectively usually at least.The high pressure main power source is given the main circuit power supply of high-pressure installation and main energy is provided, by supply load behind the high-pressure installation as electrical source of power.Outer low pressure power supply (single phase alternating current (A.C.) 220V, three-phase alternating current 380 or direct current 220V etc.) mainly provides the required direct current or the alternating current of control loop (comprising parts such as circuit board, PLC, man-machine interface, relay logic loop) of high-pressure installation.As a rule, the power supply quality of high pressure main power source is higher, can often not cause outage or wide fluctuations.The outer low pressure power supply is because links such as step-down, distribution are more, and faults such as voltage fluctuation outage can appear, in various load complexity usually on the circuit in addition.The fault of outer low pressure power supply can influence the operation (quitting work owing to cutting off the power supply as CPU) of control loop, thereby causes the jumping machine or the fault of high-pressure installation.As in the existing power supply circuits of Fig. 1, high pressure input L1, L2, L3 (exchanging as 6KV) process main transformer T1 are after provide required electric energy to load behind the major loop.Main transformer can be divided into single secondary or many secondary according to the different topological structure of device, and secondary voltage is generally three-phase alternating current 380V to 10000V.With single phase alternating current (A.C.) 220V is example, and the outer low pressure power supply is powered to control loop, and each components interior of control loop shown in Figure 1 may contain various reduction voltage circuits or AC/DC, DC/DC circuit, to realize required interchange or the direct voltage of control loop internal part.
In this supply power mode, between high voltage source and the outer low pressure power supply without any contact.When the outer low pressure power failure, cause control loop to work, device is shut down.Conventional solution is to adopt outer low pressure power supply double circuit power supply to automatically switch to add the mode of uninterrupted power supply UPS.The user need provide two road outer low pressure power supplys, wherein automatically switches in addition one the tunnel after one tunnel outage, and the of short duration outage in the handoff procedure guarantees continuous output by UPS.The problem of taking this solution mainly to exist is: switch the double loop and UPS increases extra cost; The reliability of the storage battery that UPS is especially inner is not high, and the life-span is not long, usually occurs causing phenomenons such as high-pressure installation shutdown because of the fault of UPS own.
The utility model content
Technical problem to be solved in the utility model is: in order to solve the cost height that the control loop supply power mode exists in the existing high-pressure installation, problem such as reliability is low provides the power supply circuits of a kind of low cost, highly reliable control loop.
The utility model is achieved in that
The power supply circuits of control loop in a kind of high-pressure installation comprise the outer low pressure power supply, and described outer low pressure power supply links to each other with described control loop by an AC-DC converter, a diode successively; Comprise that also transformer secondary winding links to each other with described control loop through another AC-DC converter, another diode successively.
The output plus terminal of described two AC-DC converters links to each other with the positive pole of described two diodes respectively, link to each other with the anode of described control loop after the negative pole parallel connection of described two diodes, link to each other with the negative terminal of described control loop after the output negative terminal parallel connection of described two AC-DC converters.
The output negative terminal of described two AC-DC converters links to each other with the negative pole of described two diodes respectively, the back anodal in parallel of described two diodes links to each other with the negative terminal of described control loop, links to each other with the anode of described control loop after the output plus terminal parallel connection of described two AC-DC converters.
Auxiliary winding of one secondary of the main transformer that described transformer secondary winding is described high-pressure installation or described transformer are separated transformer, and its former limit directly links to each other with high voltage source.
The phase voltage that described transformer secondary winding is a three-phase 380V star connection or be the line voltage or the single-phase 220V of three-phase 220V connection.
Another implementation of the present utility model is:
The power supply circuits of control loop in a kind of high-pressure installation comprise the outer low pressure power supply, when described outer low pressure power supply is direct current, link to each other with described control loop by dc dc converter, a diode successively; Comprise that also transformer secondary winding links to each other with described control loop through AC-DC converter, another diode successively.
The beneficial effects of the utility model:,, when the outer low pressure power cut-off, can keep the operate as normal of control loop by the high voltage source power supply owing to import power supply stand-by power supply each other by outer low pressure power supply and high pressure according to the technical solution of the utility model.When high voltage source had a power failure in short-term owing to reasons such as high voltage supply bus switching cause, the outer low pressure power supply can be kept the normal operation of control loop.Middle handoff procedure is without any interruption.
Description of drawings
Fig. 1 is existing high-pressure installation control loop power supply circuits;
Fig. 2 adopts the control loop power supply circuits of the auxiliary winding of main transformer for the utility model;
Fig. 3 adopts the control loop power supply circuits that add step-down transformer in addition for the utility model;
Fig. 4 is for carrying out DC power supply another standby way of realization in real time by diode.
Embodiment
According to Fig. 2, control loop adopts direct current supply, the DC power supply source divides two the tunnel, the outer low pressure power supply of leading up to is through AC-DC converter AC/DC2, this sentences single phase alternating current (A.C.) 220V input, and direct current 24V is output as example, is that direct current obtains with exchange conversion, the secondary that the high-pressure installation input transformer of leading up to is in addition set up is assisted winding Y, will power through AC-DC converter AC/DC1 after the high pressure step-down.AC-DC converter AC/DC1 output plus terminal is connected to the anode of diode D1, and the anode of AC-DC converter AC/DC2 output is connected to the anode of diode D2, the negative electrode parallel connection of diode D1 and D2; The negative terminal of AC-DC converter AC/DC1 and AC/DC2 output is directly in parallel.Link control loop power positive end P after the negative electrode parallel connection of two diodes; Link the negative terminal N of control loop power supply after the negative terminal parallel connection of two AD/DC, 24V is provided DC power supply for the parts of control loop.
The circuit that the output of the direct current of AC-DC converter AC/DC1 and AC/DC2 is formed by diode D1 and D2 is realized standby in real time, as long as high voltage source and outer low pressure power supply wherein any one the tunnel have electricity, the work of control loop is unaffected.When high pressure 6KV outage, outside 220V just often, AC-DC converter AC/DC1 no-output, AC-DC converter AC/DC2 powers to control loop by diode D2.6KV is normal when high pressure, when outside 220V cuts off the power supply, and AC-DC converter AC/DC2 no-output, AC-DC converter AC/DC1 powers to control loop by diode D1.When high pressure 6KV and outside 220V all just often, height according to two AC-DC converter AC/DC converter output voltages, the corresponding diode current flow that connects of the AC-DC converter AC/DC that voltage is high, to the control loop power supply, other one group of AC-DC converter AC/DC is for unloaded stand-by state.
Because the conduction voltage drop of diode, the direct voltage that control loop obtains may descend slightly, may be 23.3V (supposing that diode drop is 0.7V) in this example, but generally can not influence the operation of control loop.As required, also can suitably heighten the output voltage of two groups of AC/DC converters (such as being adjusted to 24.7V), after guaranteeing to deduct diode drop, the voltage that control loop obtains is direct current 24V.
According to the mode among Fig. 2, the auxiliary winding of transformer T1 is the three-phase star connection, and line voltage is 380V, for security consideration, and the common ground connection of central point, phase voltage is single-phase 220V, receives the ac input end of AC-DC converter AC/DC1.Certainly also can assist winding to be set to three-phase 220V, directly power to AC/DC1 with line voltage.As required, the auxiliary winding of transformer T1 also can be set to the single-phase secondary that voltage is 220V, directly powers to AC/DC1.
The scheme among Fig. 3 and the difference of the scheme among Fig. 2 are:
The interchange input of AC-DC converter AC/DC1 comes from the step-down transformer T2 that newly establishes, rather than the auxiliary winding of the secondary of transformer T1.Transformer T2 is depressed into low-voltage alternating-current (as 220V) back with high pressure drop and gives AC-DC converter AC/DC1 power supply.This scheme is particularly useful for the situation that high-pressure installation itself does not contain main transformer T1.
According to the mode among Fig. 3, the former edge joint of transformer T2 is to the line voltage of high-pressure installation input, and the former limit of transformer also can be connected to the phase voltage of high pressure input as required, and transformer T2 secondary voltage is single phase alternating current (A.C.) 220V.From security standpoint, an end of transformer secondary needs ground connection usually.
When the outer low pressure power supply was the direct current input, the AC/DC2 among Fig. 2, Fig. 3 changed dc dc converter DC/DC2 into, directly outer low pressure direct current (as direct current 220V) was transformed into corresponding low-voltage DC (as 24V), and remainder remains unchanged.
AC-DC converter AC/DC among Fig. 2 and Fig. 3 or above-mentioned dc dc converter DC/DC can adopt any suitable electric power conversion apparatus, adopt AC rectification to become the mode that adopts the Switching Power Supply voltage stabilizing behind the direct current more usually.The structure of Switching Power Supply converting means is that those of ordinary skill in the art is familiar with, and here is not described in detail.Specifically can be referring to " high frequency power electronics " (ISBN7-03-003356-6/TN.136 in 1993 of Science Press).
By diode carry out DC power supply in real time another standby way of realization see Fig. 4, identical among the effect of realization and Fig. 2, Fig. 3.AC-DC converter AC/DC1 output negative terminal is connected to the negative electrode of diode D1 among Fig. 4, and the negative terminal of AC-DC converter AC/DC2 output is connected to the negative electrode of diode D2, the anode parallel connection of diode D1 and D2; The anode of AC-DC converter AC/DC1 and AC/DC2 output is directly in parallel.Link control loop power supply negative terminal N after the anode parallel connection of two diodes, link the anode P of control loop power supply after the anode parallel connection of two AC-DC converter AD/DC, 24V is provided DC power supply for the parts of control loop.
Above reference embodiment of the present utility model has been described the utility model; but those of ordinary skill in the art obviously can make various modifications, changes and improvements to embodiment, but these modifications, changes and improvements all should belong to protection range of the present utility model.

Claims (10)

1. the power supply circuits of control loop in the high-pressure installation comprise the outer low pressure power supply, it is characterized in that: when described outer low pressure power supply is alternating current, link to each other with described control loop by an AC-DC converter, a diode successively; Comprise that also transformer secondary winding links to each other with described control loop through another AC-DC converter, another diode successively.
2. the power supply circuits of control loop in the high-pressure installation according to claim 1, it is characterized in that: the output plus terminal of described two AC-DC converters links to each other with the positive pole of described two diodes respectively, link to each other with the anode of described control loop after the negative pole parallel connection of described two diodes, link to each other with the negative terminal of described control loop after the output negative terminal parallel connection of described two AC-DC converters.
3. the power supply circuits of control loop in the high-pressure installation according to claim 1, it is characterized in that: the output negative terminal of described two AC-DC converters links to each other with the negative pole of described two diodes respectively, the back anodal in parallel of described two diodes links to each other with the negative terminal of described control loop, links to each other with the anode of described control loop after the output plus terminal parallel connection of described two AC-DC converters.
4. according to the power supply circuits of control loop in the described high-pressure installation of one of claim 1~3, it is characterized in that: auxiliary winding of a secondary of the main transformer that described transformer secondary winding is described high-pressure installation or described transformer are separated transformer, and its former limit directly links to each other with high voltage source.
5. the power supply circuits of control loop in the high-pressure installation according to claim 4 is characterized in that: the phase voltage that described transformer secondary winding is a three-phase 380V star connection or be the line voltage or the single-phase 220V of three-phase 220V connection.
6. the power supply circuits of control loop in the high-pressure installation comprise the outer low pressure power supply, it is characterized in that: when described outer low pressure power supply is direct current, link to each other with described control loop by dc dc converter, a diode successively; Comprise that also transformer secondary winding links to each other with described control loop through AC-DC converter, another diode successively.
7. the power supply circuits of control loop in the high-pressure installation according to claim 6, it is characterized in that: the output plus terminal of described dc dc converter and AC-DC converter links to each other with the positive pole of described two diodes respectively, link to each other with the anode of described control loop after the negative pole parallel connection of described two diodes, link to each other with the negative terminal of described control loop after the output negative terminal parallel connection of described dc dc converter and AC-DC converter.
8. the power supply circuits of control loop in the high-pressure installation according to claim 6, it is characterized in that: the output negative terminal of described dc dc converter and AC-DC converter links to each other with the negative pole of described two diodes respectively, the back anodal in parallel of described two diodes links to each other with the negative terminal of described control loop, links to each other with the anode of described control loop after the output plus terminal parallel connection of described dc dc converter and AC-DC converter.
9. according to the power supply circuits of control loop in the described high-pressure installation of one of claim 6~8, it is characterized in that: auxiliary winding of a secondary of the main transformer that described transformer secondary winding is described high-pressure installation or described transformer are separated transformer, and its former limit directly links to each other with high voltage source.
10. the power supply circuits of control loop in the high-pressure installation according to claim 9 is characterized in that: the phase voltage that described transformer secondary winding is a three-phase 380V star connection or be the line voltage or the single-phase 220V of three-phase 220V connection.
CNU2007200668992U 2007-01-31 2007-01-31 Power supply circuit for control circuit in high voltage device Expired - Lifetime CN201041956Y (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101931230A (en) * 2009-06-18 2010-12-29 张太平 Wire or power supply general circuit
CN102214918A (en) * 2011-06-15 2011-10-12 艾默生网络能源有限公司 High-reliability power supply system, method and frequency converter system
CN104584378A (en) * 2012-08-29 2015-04-29 三菱电机株式会社 Station building power supply device and method for controlling same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101931230A (en) * 2009-06-18 2010-12-29 张太平 Wire or power supply general circuit
CN102214918A (en) * 2011-06-15 2011-10-12 艾默生网络能源有限公司 High-reliability power supply system, method and frequency converter system
CN104584378A (en) * 2012-08-29 2015-04-29 三菱电机株式会社 Station building power supply device and method for controlling same
CN104584378B (en) * 2012-08-29 2017-12-05 三菱电机株式会社 Station supply unit and its control method

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C14 Grant of patent or utility model
GR01 Patent grant
C41 Transfer of patent application or patent right or utility model
TR01 Transfer of patent right

Effective date of registration: 20090731

Address after: 3 floor, 6 building, 899 Zushi Road, Zhangjiang hi tech park, Pudong New Area, Shanghai. Zip code: 201203

Co-patentee after: Shanghai SGEG (Group) Co., Ltd.

Patentee after: Shanghai AI Po Electric Power Electronics Co., Ltd.

Address before: Shanghai City, Pudong New Area Zhangjiang Road No. 899 Building No. 6 Zuchongzhi 3 floor, zip code: 201203

Patentee before: Shanghai Iper Electric Power Electronics Co., Ltd.

ASS Succession or assignment of patent right

Owner name: SHANGHAI AOTONG WEIER POWER ELECTRONICS CO., LTD.

Free format text: FORMER OWNER: SVA ELECTRIC (GROUP) COMPANY LIMITED

C41 Transfer of patent application or patent right or utility model
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Effective date of registration: 20100309

Address after: 201203 Shanghai city Zuchongzhi road Pudong New Area Zhangjiang hi tech Park No. 899, No. 6 Building 3 floor

Patentee after: Shanghai Iper Electric Power Electronics Co., Ltd.

Patentee after: Shanghai Autowell Power Electronics Co., Ltd.

Address before: 201203 Shanghai city Zuchongzhi road Pudong New Area Zhangjiang hi tech Park No. 899, No. 6 Building 3 floor

Patentee before: Shanghai Iper Electric Power Electronics Co., Ltd.

Patentee before: Shanghai Guangdian Electric (Group) Co., Ltd.

ASS Succession or assignment of patent right

Owner name: SVA ELECTRIC (GROUP) COMPANY LIMITED

Free format text: FORMER OWNER: SHANGHAI AGE CO., LTD.

C41 Transfer of patent application or patent right or utility model
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Effective date of registration: 20100531

Address after: 201203 Shanghai city Zuchongzhi road Pudong New Area Zhangjiang hi tech Park No. 899, No. 6 Building 3 floor

Co-patentee after: Shanghai Guangdian Electric (Group) Co., Ltd.

Patentee after: Shanghai Iper Electric Power Electronics Co., Ltd.

Address before: 201203 Shanghai city Zuchongzhi road Pudong New Area Zhangjiang hi tech Park No. 899, No. 6 Building 3 floor

Co-patentee before: Shanghai Autowell Power Electronics Co., Ltd.

Patentee before: Shanghai Iper Electric Power Electronics Co., Ltd.

ASS Succession or assignment of patent right

Owner name: SHANGHAI AGE POWER ELECTRONICS CO., LTD.

Free format text: FORMER OWNER: SHANGHAI AIPA POWER + ELECTRONICS CO., LTD.

Effective date: 20101126

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Free format text: CORRECT: ADDRESS; FROM: 201203 3/F, BUILDING 6, NO.899, ZUCHONGZHI ROAD, ZHANGJIANG HIGH SCI-TECH PARK, PUDONG NEW DISTRICT, SHANGHAI TO: 201400 NO.1, LANE 123, HUANCHENG EAST ROAD, NANQIAO TOWN, FENGXIAN DISTRICT, SHANGHAI

TR01 Transfer of patent right

Effective date of registration: 20101126

Address after: 201400, No. 123, Lane 1, East Ring Road, South Bridge Town, Shanghai, Fengxian District

Co-patentee after: Shanghai Guangdian Electric (Group) Co., Ltd.

Patentee after: Shanghai Autowell Power Electronics Co., Ltd.

Address before: 201203 Shanghai city Zuchongzhi road Pudong New Area Zhangjiang hi tech Park No. 899, No. 6 Building 3 floor

Co-patentee before: Shanghai Guangdian Electric (Group) Co., Ltd.

Patentee before: Shanghai Iper Electric Power Electronics Co., Ltd.

CX01 Expiry of patent term

Granted publication date: 20080326