CN104362730A - Control method for promoting light load of UPS (Uninterrupted Power Supply) - Google Patents
Control method for promoting light load of UPS (Uninterrupted Power Supply) Download PDFInfo
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- CN104362730A CN104362730A CN201410579417.8A CN201410579417A CN104362730A CN 104362730 A CN104362730 A CN 104362730A CN 201410579417 A CN201410579417 A CN 201410579417A CN 104362730 A CN104362730 A CN 104362730A
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Abstract
The invention relates to a control method for promoting the light load of a UPS (Uninterrupted Power Supply). The UPS at least comprises four power units such as a rectification unit 1, a rectification unit 2, an inverter unit 1 and an inverter unit 2 which are connected in parallel; the UPS is used for judging an existing operation state, if the operation state of the system does not meet a condition 1, i.e. the capacity is less than a threshold value a and the lasting time exceeds t1, the system keeps the parallel operation state of the power units; if the operation state of the system is judged to meet the condition 1, turn off any one or two power units in the system according to specific index demands; under the state that part of power units in the system are turned off, if the existing operation state of the system meets a condition 2, i.e. the capacity is greater than a threshold 2, restoring to the primary parallel operation state of the power units; if the existing operation state does not meet the condition 2, keeping the state that part of power units in the system are turned off. According to the control method provided by the invention, the performance index can be improved under the light load operation of the UPS, and the service efficiency can be improved.
Description
Technical field
The present invention relates to UPS performance control technique field, particularly relate to a kind of control method promoting UPS underloading performance.
Background technology
UPS is a kind of containing batteries to store energy device, take inverter as the power protective equipment of formant.When civil power input is normal, civil power is just transformed to stable alternating voltage for load by rectification, inverter circuit by UPS, completes the charging to storage battery simultaneously; When civil power is abnormal, the energy stored in storage battery is just converted to the alternating current powering load of constant voltage, constant frequency by UPS by DC boosting, inverter circuit.And when there is the anomalies such as overload, excess temperature as UPS, load will be changed to bypass end from inversion end-grain cutting by UPS, guarantees load end not power down.
In practical application design, in order to obtain the UPS product of more high power capacity fast, often can adopt the design of power cell parallel connection.Due in actual use, under UPS often works in underloading situation, therefore the performance index of UPS in underloading situation (as input current total harmonic distortion rate, complete machine conversion efficiency etc.) have more and more received publicity, tradition UPS pays close attention to fully loaded performance parameter, and therefore general UPS underloading index is difficult to meet the demands.
Summary of the invention
The present invention, for solving the problem, provides a kind of control method promoting UPS underloading performance, and it can close some power cell by external control, improves the UPS performance index under light condition.
For achieving the above object, the technical solution adopted in the present invention is:
Promote a control method for UPS underloading performance, at least comprise be connected in parallel rectification unit 1, rectification unit 2 and inversion unit 1, inversion unit 2 four power cells; Ups system judges current running status, if system running state does not satisfy condition 1, namely load capacity be less than threshold value a and the duration more than t1, then system keeps power cell parallel running state; If system judges that running status satisfies condition 1, turn off any one or two power cells in system according to concrete index demand; Under the state having Partial Power unit to be switched off in systems in which, if system judges that current operating conditions satisfies condition 2, namely load capacity is greater than threshold value b, then return to initial power cell parallel running state; If do not satisfy condition 2, then the state that in keeping system, part power cell is switched off.
Preferably, described threshold value a is less than 30%.
Preferably, described threshold value b is greater than 45%.
Preferably, if system judges that running status satisfies condition 1, turn off two power cells in system according to concrete index demand.
Preferably, two power cells be switched off described in are a rectification unit and an inversion unit.
Wherein, described index demand comprises input current total harmonic distortion rate, complete machine conversion efficiency and idling consumption.
Wherein, when needing to reduce input current total harmonic distortion rate, rectification unit 2 is turned off.
Wherein, when needing to obtain high complete machine conversion efficiency or low idling consumption, need to turn off rectification unit 2 and inversion unit 2.
The control method of lifting UPS underloading performance of the present invention, its beneficial effect is:
When UPS underloading, according to its running status and index performance, selectivity turns off some or two power cells, the performance index such as the input current total harmonic distortion rate of UPS, complete machine conversion efficiency and idling consumption are improved when underloading, meet the user demand of UPS, improve its service efficiency.
Accompanying drawing explanation
Fig. 1 is the circuit topology figure that the present invention promotes UPS in the control method of UPS underloading performance;
Fig. 2 is the flow chart that the present invention promotes the control method of UPS underloading performance.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail.
Embodiment:
With reference to Fig. 1, the control method of lifting UPS underloading performance of the present invention, wherein UPS comprise be connected in parallel rectification unit 1, rectification unit 2 and inversion unit 1, inversion unit 2 four power cells; And suitably can increase power cell as required.
With reference to Fig. 2, progress control method is: setting model 1 and condition 2, condition 1 for present load amount be less than threshold value a and the duration more than t1, wherein threshold value a be less than 30% numerical value, i.e. present load amount only has less than 30%, be in light running, time t1 can be the time in 5s ~ 10min, determines according to the situation of UPS.Condition 2 is greater than threshold value b for load capacity, wherein threshold value b be greater than 45% numerical value.
Current UPS is in light running state, and ups system judges current running status, if system running state does not satisfy condition 1, namely load capacity be less than threshold value a and the duration more than t1, then system keeps power cell parallel running state; If system judges that running status satisfies condition 1, turn off any one or two power cells in system according to concrete index demand; Under the state having Partial Power unit to be switched off in systems in which, if system judges that current operating conditions satisfies condition 2, namely load capacity is greater than threshold value b, then return to initial power cell parallel running state; If do not satisfy condition 2, then the state that in keeping system, part power cell is switched off.
If system judges that running status satisfies condition 1, according to concrete index demand, be generally two power cells turned off in system, i.e. an inversion unit and a rectification unit.
Index demand wherein comprises the indexs such as input current total harmonic distortion rate, complete machine conversion efficiency and idling consumption.Illustrate:
When needs reduce input current total harmonic distortion rate, turn off rectification unit 2, because the load capacity of now rectification unit 1 can double, the input current of rectification unit 1 controls mainly based on fully loaded design, load capacity is larger, and input current total harmonic distortion rate index is better.
When needing to obtain high complete machine conversion efficiency or low idling consumption, need to turn off rectification unit 2 and inversion unit 2, time unloaded, turn off rectification unit 2 and inversion unit 2, the no-load loss of this part can be reduced, therefore also just can reduce the idling consumption of complete machine.In underloading situation, as load capacity 20-30%, the conversion efficiency of usual rectification unit and inversion unit is all undesirable, and can promote the load capacity of rectification unit 1 and inversion unit 1 after turning off rectification unit 2 and inversion unit 2 to 40-60%, this can promote the conversion efficiency of complete machine.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (8)
1. promote a control method for UPS underloading performance, at least comprise be connected in parallel rectification unit 1, rectification unit 2 and inversion unit 1, inversion unit 2 four power cells, it is characterized in that:
Ups system judges current running status, if system running state does not satisfy condition 1, namely load capacity be less than threshold value a and the duration more than t1, then system keeps power cell parallel running state; If system judges that running status satisfies condition 1, turn off any one or two power cells in system according to concrete index demand;
Under the state having Partial Power unit to be switched off in systems in which, if system judges that current operating conditions satisfies condition 2, namely load capacity is greater than threshold value b, then return to initial power cell parallel running state; If do not satisfy condition 2, then the state that in keeping system, part power cell is switched off.
2. promote the control method of UPS underloading performance according to claim 1, it is characterized in that: described threshold value a is less than 30%.
3. promote the control method of UPS underloading performance according to claim 1, it is characterized in that: described threshold value b is greater than 45%.
4. promote the control method of UPS underloading performance according to claim 1, it is characterized in that: if system judges that running status satisfies condition 1, turn off two power cells in system according to concrete index demand.
5. promote the control method of UPS underloading performance according to claim 2, it is characterized in that: two power cells be switched off are a rectification unit and an inversion unit.
6. promote the control method of UPS underloading performance according to claim 1, it is characterized in that: described index demand comprises input current total harmonic distortion rate, complete machine conversion efficiency and idling consumption.
7. promote the control method of UPS underloading performance according to claim 6, it is characterized in that: when needing to reduce input current total harmonic distortion rate, turn off rectification unit 2.
8. promote the control method of UPS underloading performance according to claim 6, it is characterized in that:
When needing to obtain high complete machine conversion efficiency or low idling consumption, need to turn off rectification unit 2 and inversion unit 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410579417.8A CN104362730A (en) | 2014-10-24 | 2014-10-24 | Control method for promoting light load of UPS (Uninterrupted Power Supply) |
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| CN201410579417.8A CN104362730A (en) | 2014-10-24 | 2014-10-24 | Control method for promoting light load of UPS (Uninterrupted Power Supply) |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106655794A (en) * | 2016-12-08 | 2017-05-10 | 国网智能电网研究院 | Power electronic transformer and control method thereof |
| CN110474420A (en) * | 2019-07-22 | 2019-11-19 | 漳州科华技术有限责任公司 | Control method, control device and the controlling terminal of multi-standard uninterruptible power supply |
| CN111023507A (en) * | 2019-12-23 | 2020-04-17 | 漳州科华技术有限责任公司 | Air conditioner control method, air conditioner control device and air conditioner |
| CN111669062A (en) * | 2020-03-21 | 2020-09-15 | 青岛鼎信通讯股份有限公司 | System operation method for improving light load and no-load efficiency of energy router |
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| CN111023507A (en) * | 2019-12-23 | 2020-04-17 | 漳州科华技术有限责任公司 | Air conditioner control method, air conditioner control device and air conditioner |
| CN111669062A (en) * | 2020-03-21 | 2020-09-15 | 青岛鼎信通讯股份有限公司 | System operation method for improving light load and no-load efficiency of energy router |
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Application publication date: 20150218 |