CN203301212U

CN203301212U - Dual standby saving type DC power supply system

Info

Publication number: CN203301212U
Application number: CN2013203672088U
Authority: CN
Inventors: 黄文坤; 卢咸进; 朱锦坤
Original assignee: Xiamen Zhongxin Electrical Equipment Co Ltd
Current assignee: Xiamen Zhongxin Electrical Equipment Co Ltd
Priority date: 2013-06-25
Filing date: 2013-06-25
Publication date: 2013-11-20
Anticipated expiration: 2023-06-25

Abstract

The utility model discloses a dual standby saving type DC power supply system, which comprises at least two parallelly connected first power supply devices providing power for a control bus, at least two parallelly connected second power supply devices providing power for a closing bus, and a switching switch connecting the control bus and the closing bus, wherein input end of the first and second power supply devices are respectively connected with an external AC power supply, each of the first and second power supply devices are respectively connected with a battery pack, and each battery pack adopts two storage batteries. On the premise of ensuring reliable power supply for the control bus and the closing bus, the dual standby saving type DC power supply system saves the use amount of the storage batteries, avoids the waste caused by idle storage batteries, saves the cost, and avoids the defect that the whole storage battery pack cannot provide DC power supply normally because of a signal storage battery is damaged.

Description

A kind of dual standby economizing type DC power-supply system

Technical field

The utility model relates to a kind of DC power-supply system, specifically a kind of dual standby economizing type DC power-supply system.

Background technology

In the places such as power station, transformer station, often be furnished with the various electric function cabinets such as switch cubicle, power distribution cabinet, relaying protection cabinet, automation control cubicle, it is its power supply that these electric function cabinets all need DC power supply.

Referring to Fig. 1, direct current cabinet is as a kind of equipment that stable dc power supply can be provided, generally have charging module 100 ' and batteries 200 '.When external ac power source was normal, charging module 100 ' alternating current is directly changed into to the 220V direct current directly was the closing bus bar power supply, simultaneously by after voltage dropping silicon chain 300 ' carry out step-down, for control bus, powering; When external ac power source is abnormal, by batteries, be directly the closing bus bar power supply, simultaneously by voltage dropping silicon chain 300 ' carrying out after step-down is that control bus is powered.

Control bus is mainly that these are all the chronicity loads to power supplies such as Microcomputer Protection, indicator light, instrument; And closing bus bar is mainly to energy storage motor (about operating time 20S), divide-shut brake coil power supply (operating time number millisecond), these be all in short-term, momentary load, and be all have under failure condition just in harness.

Due to the needed number of batteries of batteries according to load input voltage classification, and the input voltage of load request is generally higher, the storage battery quantity that needs accordingly is many, be inconvenient to detect maintenance, be easy to because the charging imbalance causes single battery to damage, and then cause whole batteries that DC power supply can't normally be provided.

The utility model content

The purpose of this utility model is to provide a kind of dual standby economizing type DC power-supply system, and it has saved the usage quantity of storage battery, has effectively guaranteed the reliability of power supply simultaneously, has avoided the scene of the accident of causing because of power failure paralysis.

For achieving the above object, the utility model is by the following technical solutions:

A kind of dual standby economizing type DC power-supply system, the diverter switch that comprises second source device and connection control bus and the closing bus bar for the closing bus bar power supply of first supply unit for the control bus power supply of at least two parallel connections, at least two parallel connections, the input of described first, second supply unit connects respectively external ac power source, described each first, second supply unit is connected with a battery pack respectively, and described battery pack adopts two joint storage batterys.

preferably, described the first supply unit and described second source device include rectification module, pfc circuit, voltage reduction module, charging circuit, boost module, zero commutation circuit and DSP control unit, rectification module becomes high direct voltage by AC voltage conversion, and be transported to the input of pfc circuit, the output of pfc circuit connects the input of voltage reduction module, the output of voltage reduction module connects control bus or closing bus bar, the input of charging circuit connects the output of voltage reduction module, the output of charging circuit connects described battery pack, the input of boost module is connected with described battery pack, the output of boost module connects the input of zero commutation circuit, the output of zero commutation circuit connects control bus or closing bus bar, the DSP control unit is controlled respectively pfc circuit, voltage reduction module, charging circuit, boost module and zero commutation circuit work.

Preferably, the quantity of described first, second supply unit is 2.

Preferably, the quantity of described the first supply unit is 3.

Preferably, the battery capacity that is connected with described the first supply unit is larger than the battery capacity that is connected with described second source device.

Preferably, described diverter switch adopts circuit breaker open in usual or electronic switch.

After adopting technique scheme, the utility model is compared with background technology, has following advantage:

1, the utility model, under the prerequisite that has guaranteed as control bus and closing bus bar reliable power supply, has greatly been saved the usage quantity of storage battery, has avoided the idle waste of storage battery, provides cost savings; And avoided the whole batteries that causes because of the single-unit battery damage that the defect of DC power supply can't normally be provided.

2, configuration quantity and the selection battery parameter of storage battery can be set according to actual needs flexibly, and the market range of application is wider.

3, adopting many power supplys parallel operation mode is control bus or closing bus bar power supply, the first supply unit that namely adopts at least two parallel connections is that the second source device of control bus power supply, i.e. at least two parallel connections of employing is the closing bus bar power supply, effectively guaranteed the reliability of power supply, maintenance detects also more convenient.

4, by setting up diverter switch, can realize the first supply unit and second source device standby (dual standby) each other, further improved the reliability of power supply, also improved the utilance of storage battery simultaneously.

5, after the external ac power source outage, second source device and the first supply unit all can be control bus DC UPS are provided, and have extended effective power-on time, have avoided the scene of the accident paralysis that causes because of the control bus outage.

The accompanying drawing explanation

Fig. 1 is existing direct current cabinet structural representation;

Fig. 2 is structural representation of the present utility model;

Fig. 3 is the structural representation of the utility model the first supply unit or second source device.

Embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.

Embodiment

Refer to Fig. 2, a kind of dual standby economizing type DC power-supply system, it comprises the first supply unit 100 of at least two parallel connections, second source device 200 and the diverter switch 400 of at least two parallel connections, wherein:

The first supply unit 100 inputs connect external ac power source, and its output is connected with control bus; The input of second source device 200 connects external ac power source, and its output is connected with closing bus bar; The first supply unit 100 is connected respectively a battery pack 300 with second source device 200, when external ac power source is cut off the power supply, by battery pack 300, provides energy to realize uninterrupted power supply, and battery pack 300 adopts two joint storage batterys.

Because control bus and closing bus bar adopt the separately mode of power supply, the user can select the quantity of the first supply unit 100 and second source device 200 according to actual needs flexibly, as the user, can configure 2 the first supply units and 2 second source devices according to actual conditions, and for example the user can configure 3 the first supply units (strengthening the reliability for the control bus power supply) and 2 second source devices according to actual conditions.The quantity of the first supply unit 100 and second source device 200 is 2 in the present embodiment.

In addition, the user also can be according to the different power demands of control bus and closing bus bar, adjust flexibly the capacity of battery pack 300, while due to outside, cutting off the power supply, the electric energy that consumes on control bus is more than the electric energy that consumes on closing bus bar, therefore the user can select the battery pack 300 of different capabilities to be respectively control bus and closing bus bar provides back-up source.That is, the user can select the capacity of the battery pack 300 that the Capacity Ratio of the battery pack 300 that is connected with the first supply unit 100 is connected with the second source device large.

Two terminals of diverter switch 400 connect respectively control bus and closing bus bar, by the switching of diverter switch 400, move and can realize the standby each other of the first supply unit 100 and second source device 200.Diverter switch 400 can adopt circuit breaker open in usual or electronic switch, and its switching mode can adopt automatic switchover, can be also manual switchover.When the input voltage of control bus during lower than set point or no-voltage input, diverter switch 400 actions, control bus and closing bus bar conducting, for the second source device 200 of closing bus bar power supply is powered to control bus, same, when the input voltage of closing bus bar is abnormal, by the switching action of diverter switch 400, for the first supply unit 100 of control bus power supply is powered to closing bus bar.

It will be understood by those skilled in the art that at power domains such as transformer station, power stations, control bus connects the regular loads such as protective relaying device, control of intelligent terminal, indicator light, and closing bus bar connects the impact loads such as energy storage motor, divide-shut brake coil.

referring to Fig. 3, the first supply unit 100 and second source device 200 include rectification module 110, pfc circuit 120, voltage reduction module 130, charging circuit 140, boost module 150, zero commutation circuit 160 and DSP control unit 170, rectification module 110 becomes high direct voltage by AC voltage conversion, and be transported to the input of pfc circuit 120, the output of pfc circuit 120 connects the input of voltage reduction module 130, the output of voltage reduction module 130 connects control bus or closing bus bar, the input of charging circuit 140 connects the output of voltage reduction module 130, the output of charging circuit 140 connects battery pack 300, the input of boost module 150 is connected with battery pack 300, the output of boost module 150 connects the input of zero commutation circuit 160, the output of zero commutation circuit 160 connects control bus or closing bus bar, DSP control unit 170 is controlled respectively pfc circuit 120, voltage reduction module 130, charging circuit 140, boost module 150 and zero commutation circuit 160 work.It should be noted that, the first supply unit 100 or second source device 200 also can adopt the circuit structure of existing disclosed other DC UPSs, do not repeat them here.

During work, two the first supply unit 100 parallel connections, output DC is regular load supplying to control bus simultaneously, two second source device 200 parallel connections, output DC is also the impact load supplying to closing bus bar simultaneously, even certain first supply unit 100 or second source device 200 break down, still can guarantee as control bus or closing bus bar continued power, thereby greatly improve the reliability of power supply.

When two the first supply units 100 break down can not power for control bus the time simultaneously, diverter switch 400 actions, by second source device 200, be the control bus power supply, in like manner, when two second source devices 200 break down can not power for closing bus bar the time, also can be the closing bus bar power supply by the first supply unit 100, thereby realized the standby each other of the first supply unit 100 and second source device 200, further improve the reliability of power supply, also improved the utilance of battery pack 300 simultaneously.

Because the first supply unit 100 and second source device 200 can be standby each other, after the external ac power source outage, second source device 200 and the first supply unit 100 all can be control bus provides DC UPS, extend power-on time, avoided the scene of the accident paralysis that causes because of the control bus outage.

The above; it is only preferably embodiment of the utility model; but protection range of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement, within all should being encompassed in protection range of the present utility model.Therefore, protection range of the present utility model should be as the criterion with the protection range of claim.

Claims

1. dual standby economizing type DC power-supply system, it is characterized in that: the diverter switch that comprises second source device and connection control bus and the closing bus bar for the closing bus bar power supply of first supply unit for the control bus power supply of at least two parallel connections, at least two parallel connections, the input of described first, second supply unit connects respectively external ac power source, described each first, second supply unit is connected with a battery pack respectively, and described battery pack adopts two joint storage batterys.

2. a kind of dual standby economizing type DC power-supply system as claimed in claim 1, it is characterized in that: described the first supply unit and described second source device include rectification module, pfc circuit, voltage reduction module, charging circuit, boost module, zero commutation circuit and DSP control unit, rectification module becomes high direct voltage by AC voltage conversion, and be transported to the input of pfc circuit, the output of pfc circuit connects the input of voltage reduction module, the output of voltage reduction module connects control bus or closing bus bar, the input of charging circuit connects the output of voltage reduction module, the output of charging circuit connects described battery pack, the input of boost module is connected with described battery pack, the output of boost module connects the input of zero commutation circuit, the output of zero commutation circuit connects control bus or closing bus bar, the DSP control unit is controlled respectively pfc circuit, voltage reduction module, charging circuit, boost module and zero commutation circuit work.

3. a kind of dual standby economizing type DC power-supply system as claimed in claim 2, it is characterized in that: the quantity of described first, second supply unit is 2.

4. a kind of dual standby economizing type DC power-supply system as claimed in claim 2, it is characterized in that: the quantity of described the first supply unit is 3.

5. a kind of dual standby economizing type DC power-supply system as claimed in claim 2, it is characterized in that: the battery capacity that is connected with described the first supply unit is larger than the battery capacity that is connected with described second source device.

6. a kind of dual standby economizing type DC power-supply system as claimed in claim 1, is characterized in that: described diverter switch employing circuit breaker open in usual or electronic switch.