CN201174619Y - Power supply source for converter transformer cooling system control circuit - Google Patents
Power supply source for converter transformer cooling system control circuit Download PDFInfo
- Publication number
- CN201174619Y CN201174619Y CNU2008200765520U CN200820076552U CN201174619Y CN 201174619 Y CN201174619 Y CN 201174619Y CN U2008200765520 U CNU2008200765520 U CN U2008200765520U CN 200820076552 U CN200820076552 U CN 200820076552U CN 201174619 Y CN201174619 Y CN 201174619Y
- Authority
- CN
- China
- Prior art keywords
- power supply
- output
- cooling system
- control circuit
- contactor
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Rectifiers (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The utility model provides an electric power supply for a control circuit of a cooling system of a convertor transformer, belonging to the power supply technical field. The electric power supply aims at solving the problem of reliably supplying power to the control circuit. The technical proposal is as follows: the electric power supply is formed an AC rectified power supply and a DC power supply set with double interlock; the AC rectified power supply and the DC power supply set with double interlock are connected in parallel, wherein the output of a first DC power supply(DC1) is used as the output end of the electric power supply through a second breaker(F2) and a normally closed contact(J-1) of a contactor(J); and the output of a second DC power supply(DC2) is connected with the output end of the electric power supply through a third breaker(F3) and a normally open contact(J-2) of the contactor(J), and a control coil of the contactor(J) is connected with the output end of the third breaker(F3). The electric power supply of the utility model can continuously supply stable and uninterrupted direct current, thereby greatly improving the reliability in the running of the cooling system of the convertor transformer.
Description
Technical field
The utility model relates to a kind of operational reliability height, is suitable for the power supply of direct current electric transmission and transformation transformer cooling system control circuit, belongs to power technique fields.
Background technology
Transformer cooling system generally is made up of electrical source of power, cooling blower, cooling oil pump and control circuit, control circuit is formed by signal acquisition circuit, PLC and for the power supply of their power supplies, and the reliability of its power supply is for the important role in safe operation of control circuit and whole transformer.The power supply of conventional AC transformer cooling system generally adopts the DC power supply of station with AC power or battery room output, promptly adopts the station to use AC power or adopt DC power supply.Such control circuit exists the defective of poor reliability, when accidentalia causes AC power or DC power supply fault, during such as battery room breaking out of fire or station usefulness transformer breaking out of fire, the power supply of tradition cooling system just is in malfunction, causes the transformer cisco unity malfunction.
At present, the direct current electric transmission and transformation technology starts to walk, and commutator transformer is had higher requirement to the reliability of cooling system, and the control circuit power supply that the traditional transformer cooling system uses has been difficult to meet the demands.
Summary of the invention
The purpose of this utility model is to provide a kind of reliable, power supply that is used for converter transformer cooling system control circuit that can satisfy the direct current electric transmission and transformation system requirements.
The alleged problem of the utility model realizes with following technical proposals:
A kind of power supply that is used for converter transformer cooling system control circuit, it is made of an ac rectifying power source and one group of mutual DC power supply of throwing of two-way, and the DC power supply that described ac rectifying power source and two-way are thrown mutually is connected in parallel; Described DC power supply comprises contactor J and two DC power supply, and wherein, the output of the first DC power supply DC1 as the output of power supply, is powered to signal acquisition circuit and PLC behind the normally-closed contact J-1 of the second circuit breaker F2 and contactor J; The output of the second DC power supply DC2 connects the power supply output behind the normally opened contact J-2 of the 3rd circuit breaker F3 and contactor J, the control coil of contactor J is connected to the output of the 3rd circuit breaker F3.
The above-mentioned power supply that is used for converter transformer cooling system control circuit, described ac rectifying power source is made of ac-dc conversion module G1, the input of described ac-dc conversion module G1 connects arbitrary phase of electrical source of power behind the contact of the first circuit breaker F1, the output of output termination power supply.
The above-mentioned power supply that is used for converter transformer cooling system control circuit, between two-way DC power supply and power supply output, set up DC/DC modular converter G2, the output of the input termination two-way DC power supply of described DC/DC modular converter G2, the output of output termination power supply.
The above-mentioned power supply that is used for converter transformer cooling system control circuit is connected in series an anti-backflow diode respectively at the output of ac rectifying power source and two-way DC power supply.
Redundant being equipped with mutually that the utility model adopts ac rectifier and two-way to throw DC power supply mutually, dispose, when ac rectifying power source or DC power supply break down, control circuit still can operate as normal, has in the two-way DC power supply when riches all the way gives birth to fault, and power supply still can be continued in another road.The DC/DC modular converter is used to adjust the supply power voltage of DC power supply, and the anti-backflow diode is used for ac rectifier and two-way are thrown the DC power supply isolation mutually.Even the utility model also can provide stable, continuous uninterrupted DC power supply under the situation that some fault takes place, improved converter transformer cooling system reliability of operation greatly, can satisfy the requirement of direct current electric transmission and transformation transformer cooling system.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is the electric theory diagram of transformer cooling system;
Fig. 2 is an electrical schematic diagram of the present utility model.
Each symbol is among the figure: G1, ac-dc conversion module; G2, DC/DC modular converter; F1, first circuit breaker; F2, second circuit breaker; F3, the 3rd circuit breaker; J, contactor; DC1, first DC power supply; DC2, second DC power supply; AC, electrical source of power; D1, D2, diode.
Embodiment
Referring to Fig. 2, the power supply of commutator transformer cooling control system constitutes parallel operation by ac rectifying power source and one group of mutual DC power supply of throwing of two-way.The main hardware of its formation is three band short-circuit protections, three circuit breaker F1, F2 of overcurrent protection, F3; the D.C. contactor J that has fly-wheel diode; ac-dc conversion module G1, DC/DC modular converter G2, and two diode D1, D2 that are used for the isolated from power effect.
The phase line of ac rectifying power source input is taken from arbitrary phase of the output of electrical source of power, and described electrical source of power should be to have the power duplicate supply that dead electricity is thrown function mutually, and electrical source of power is through ac-dc conversion module G1 transformation, rectification output DC24V direct current.
Two dc power supply DC1, DC2 take from battery room respectively.The DC2 power supply just often, D.C. contactor J adhesive, its normally-closed contact J-1 disconnects, normally opened contact J-2 closure is connected DC2; When the load loop of DC2 power supply is short-circuited or during overload fault; then second circuit breaker F2 protection disconnects; the control coil J outage of D.C. contactor; its normally-closed contact J-1 closure; normally opened contact J-2 disconnects, and connects DC1, realizes that the dead electricity of power supply is thrown mutually; the conversion of DC power supply DC/DC modular converter G2, output DC24V direct current.If battery tension is DC24V just, then DC/DC modular converter G2 also can save.
The DC power supply output DC24V direct current that the DC24V direct current and the two-way of ac rectifying power source output are thrown mutually is connected together by two diode D1, D2, forms a more stable DC24V DC power supply.All during operate as normal, both are to the load parallel operation for the DC power supply of throwing mutually when ac rectifying power source and two-way.When the electrical source of power catastrophe failure, outage when short time outage or length often appear in its electrical source of power output, this moment is just independently-powered by the DC power supply that two-way is thrown mutually.Similarly, when the catastrophe failure or the electrical connecting wires loose contacts such as battery room breaking out of fire of direct current duplicate supply, when causing the outage in short-term or when long of direct current duplicate supply, just independently-powered by ac rectifying power source.The effect of diode D1, D2 is that the DC power supply of effectively ac rectifying power source and two-way being thrown is mutually isolated, and no matter AC portion or direct current component fault can be to ac-dc conversion module G1, counter not the sending of DC/DC modular converter G2.
Transformer cooling system comprises cooler blower fan and cooler oil pump, and its operation is controlled by PLC.
Claims (4)
1, a kind of power supply that is used for converter transformer cooling system control circuit is characterized in that, it is made of an ac rectifying power source and one group of mutual DC power supply of throwing of two-way, and the DC power supply that described ac rectifying power source and two-way are thrown mutually is connected in parallel; Described DC power supply comprises contactor and two DC power supply, wherein, two DC power supply are respectively first DC power supply (DC1) and second DC power supply (DC2), the output of described first DC power supply (DC1) behind the normally-closed contact (J-1) of second circuit breaker (F2) and contactor (J) as the output of power supply; The output of second DC power supply (DC2) connects the power supply output behind the normally opened contact (J-2) of the 3rd circuit breaker (F3) and contactor (J); The control coil of contactor (J) is connected to the output of the 3rd circuit breaker (F3).
2, the power supply that is used for converter transformer cooling system control circuit according to claim 1, it is characterized in that, described ac rectifying power source is made of ac-dc conversion module (G1), the input of described ac-dc conversion module (G1) connects electrical source of power behind the contact of first circuit breaker (F1), its output connects the output of power supply.
3, the power supply that is used for converter transformer cooling system control circuit according to claim 1 and 2, it is characterized in that, between two-way DC power supply and power supply output, set up DC/DC modular converter (G2), the output of the input termination two-way DC power supply of described DC/DC modular converter (G2), its output connects the output of power supply.
4, the power supply that is used for converter transformer cooling system control circuit according to claim 3 is characterized in that, is connected in series an anti-backflow diode respectively at the output of ac rectifying power source and two-way DC power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200765520U CN201174619Y (en) | 2008-03-19 | 2008-03-19 | Power supply source for converter transformer cooling system control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200765520U CN201174619Y (en) | 2008-03-19 | 2008-03-19 | Power supply source for converter transformer cooling system control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201174619Y true CN201174619Y (en) | 2008-12-31 |
Family
ID=40201747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200765520U Expired - Fee Related CN201174619Y (en) | 2008-03-19 | 2008-03-19 | Power supply source for converter transformer cooling system control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201174619Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2521605C1 (en) * | 2013-06-19 | 2014-07-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Кубанский государственный аграрный университет" | Three-phase inverter of variable structure |
| CN105652117A (en) * | 2015-12-29 | 2016-06-08 | 国网智能电网研究院 | DC power grid full-power circulating testing circuit based on DC/DC converter |
-
2008
- 2008-03-19 CN CNU2008200765520U patent/CN201174619Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2521605C1 (en) * | 2013-06-19 | 2014-07-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Кубанский государственный аграрный университет" | Three-phase inverter of variable structure |
| CN105652117A (en) * | 2015-12-29 | 2016-06-08 | 国网智能电网研究院 | DC power grid full-power circulating testing circuit based on DC/DC converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104882891A (en) | Low-voltage distribution voltage-regulation equipment | |
| CN201789329U (en) | Uninterruptable AC and DC power supply system | |
| CN201328021Y (en) | AC/DC synthesized integrated screen | |
| CN102088209A (en) | Self-healing control method of distribution network | |
| CN103607032A (en) | Renewable energy generating, power transmission and transformation and electrical network access integrated system | |
| CN103580264A (en) | Direct current micro-grid system supplying power in looped network mode | |
| CN201146397Y (en) | Intelligent rapid emergency power supply system | |
| CN203071637U (en) | DC power supply connection control apparatus | |
| CN103683328B (en) | Automatic switching module and photovoltaic from net full-automatic power generation system | |
| CN201174619Y (en) | Power supply source for converter transformer cooling system control circuit | |
| CN201234136Y (en) | Dual power source electricity supply system | |
| CN201126979Y (en) | UPS system for transformer substation below 220kV voltage class | |
| CN205355948U (en) | Valve accuse unit electrical power generating system of HVDC system | |
| CN104821727B (en) | A kind of Switching Power Supply suitable for exceeding voltage class High aititude place | |
| CN107104441A (en) | A kind of low-voltage network both end power supplying structure for being applied to access with direct-current grid | |
| CN201226418Y (en) | Power supply cabinet | |
| CN203645346U (en) | Photovoltaic power generation inverter | |
| CN203617780U (en) | Uninterruptible power supply device for rail transit shielded gate system | |
| CN204696942U (en) | Centralized alternating current-direct current dual input d. c. remote power supply administration end system | |
| CN202840676U (en) | Low-voltage double-power-supply automatic switching device | |
| CN201789342U (en) | Transformer substation direct-current device monitoring system adopting GPRS communication mode | |
| CN102108527B (en) | Method and system for supplying power to large aluminum electrolytic plant | |
| CN204304453U (en) | A kind of interlock protection structure of water-cooling type SVG equipment | |
| CN210157071U (en) | Large and medium-sized high-voltage frequency converter group control system adopting external UPS power supply for power supply | |
| CN203456940U (en) | Power supply device for steam turbine high voltage blocking control module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081231 Termination date: 20130319 |