The auxiliary power unit of high power UPS equipment
Technical field
The utility model relates to power technology, is specifically related to the power supply redundancy technology, more particularly, relates to the auxiliary power unit of a kind of high power UPS (UPS) equipment.
Technical background
For guaranteeing the reliability of high power UPS, stable accessory power supply is the prerequisite of UPS operate as normal, and the reliability of accessory power supply is the basis of high reliability UPS.Accessory power supply in the large-capacity ups equipment often directly links to each other with electrical network, and input voltage is higher, also bears the various transient processes of electrical networks such as transition, surge, thunderbolt simultaneously, and therefore, operational environment is very abominable.Under this environment, just require accessory power supply that very high reliability must be arranged incessantly for system provides stable power.Recently, as the effective means that improves power supply reliability, redundant technique obtains widely applying in various power-supply systems.This shows,, will greatly improve the reliability of whole ups system, make load-side realize that really power supply is uninterrupted by accessory power supply is adopted redundant technique.
Summary of the invention
The technical problems to be solved in the utility model is, a kind of auxiliary power unit of high power UPS equipment is provided, and can satisfy the reliability requirement of high power UPS system under the mal-condition.
Above-mentioned technical problem of the present utility model is to solve like this, a kind of auxiliary power unit of high power UPS equipment is provided, comprise a plurality of alternative inputs and an output, between described a plurality of inputs and described output, be connected with and work simultaneously or input unit and a plurality of Power Conversions unit that the multichannel of switch operating is isolated.
In the auxiliary power unit that provides according to the utility model, described a plurality of input is first input, second input and the 3rd input, and wherein, first input end is the main road input, second input is the bypass input, and the 3rd input is bus input or UPS I/O.
In the auxiliary power unit that provides according to the utility model, be connected with between described first input end, second input, the 3rd input and the output and a plurality ofly be connected in series the unit that forms, be connected in parallel between described a plurality of unit by an input isolated location and a Power Conversion unit.
In the auxiliary power unit that provides according to the utility model, described first input end, second input, the 3rd input all are connected to one three tunnel input of isolating input unit, described three tunnel outputs of isolating input unit are connected respectively to a plurality of Power Conversions unit, and described a plurality of Power Conversions unit is connected in parallel.
Implement the auxiliary power unit of the high power UPS equipment that the utility model provides, adopt modular construction, respectively from main road, bypass, 3 power takings of bus (or UPS output) of UPS.Isolate redundant power supply between the three-way power mutually.Three the tunnel can power simultaneously, also can carry out three the tunnel and switch power supply respectively.Power Conversion is partly finished the isolated variable to power supply, and conversion goes out the stable direct current of multichannel.As required, complete machine can partly carry out redundancy, each unit stable power of feed system to input isolated part and Power Conversion flexibly.The utlity model has following advantage: the power input of multichannel input is provided, or has switched between each road or, and then guaranteed auxiliary power unit not power down in all cases simultaneously by each road power supply; In addition, the utility model adopts multimode redundant parallel structure, has improved the reliability of whole power supply unit, thereby has improved the reliability of ups system greatly.
Description of drawings
Fig. 1 is the structural representation of the utility model first embodiment;
Fig. 2 is the structural representation of the utility model second embodiment;
Fig. 3 is the structural representation of the utility model the 3rd embodiment;
Fig. 4 is the structural representation of the utility model the 4th embodiment;
Embodiment
Structure such as Fig. 1 show, existing N=2, and promptly accessory power supply adopts two modules 1 and 2 to carry out redundant parallel.During operate as normal, two modules are worked simultaneously, if a module damage withdraws from power supply automatically.Simultaneously fault is reported monitoring unit to report to the police.Concerning individual module, no matter main road and bypass one of them can guarantee normally that power supply is normal and start and power supply.Three tunnel inputs then three the tunnel are not powered simultaneously if adopt the switch operating mode, and module is selected to keep the main road power supply automatically and still switched to bypass power supply according to the main road input voltage value.If the main road input voltage is normal, module is kept the main road power supply, treat that UPS starts after, the module commutation circuit disconnects the civil power input, changes UPS dc bus (or UPS output) power supply separately, avoids the influence of electrical network transition to power supply.If main road city electrical anomaly, input switches to the bypass side, after the system start-up, is in the bypass power supply state.After UPS starts, if civil power power down, UPS is in the battery inverter mode, accessory power supply is kept by battery (or UPS output) power supply, if battery is put thanks to inverter closes, accessory power supply changes bypass power supply subsequently, at this moment, if there is not bypass, accessory power supply descends electricity at no any input source, otherwise keeps bypass power supply.Three tunnel inputs then three the road are powered simultaneously if adopt powered operation mode simultaneously, if having among three the tunnel one the road normal, but this auxiliary power unit operate as normal.
1) first embodiment
Show as Fig. 1.Each module comprises input isolation circuit and Power Conversion part, and each module is independently finished the isolation and the conversion of three tunnel inputs fully.The input and output of all modules are in parallel fully.
2) second embodiment
Show as Fig. 2.Substantially the same manner as Example 1, difference is that one of three tunnel inputs are changed to UPS output by the bus input.
3) the 3rd embodiment
Show as Fig. 3.Different with preceding two kinds of schemes, module does not comprise input isolation circuit, includes only the Power Conversion part.Whole power subsystem adopts a cover buffer circuit, only Power Conversion is partly realized redundancy.
4) the 4th embodiment
Show as Fig. 4.Basic identical with the third scheme, difference is that the bus input of one of three tunnel inputs is changed to interchange output.