CN103972978A

CN103972978A - Uninterruptible power supply and battery sharing system and control method thereof

Info

Publication number: CN103972978A
Application number: CN201410189566.3A
Authority: CN
Inventors: 杜伟; 刘�东; 陈志彬; 杨文泉; 汤贤椿
Original assignee: Xiamen Kehua Hengsheng Co Ltd
Current assignee: Xiamen Kehua Hengsheng Co Ltd
Priority date: 2014-05-07
Filing date: 2014-05-07
Publication date: 2014-08-06
Anticipated expiration: 2034-05-07
Also published as: CN103972978B

Abstract

The invention relates to an uninterruptible power supply and battery sharing system and control method of the uninterruptible power supply and battery sharing system. The uninterruptible power supply and battery sharing system comprises a first switching circuit, a second switching circuit, a third switching circuit, a first voltage sampling circuit, a second voltage sampling circuit, a third voltage sampling circuit, a fourth voltage sampling circuit and a control module. The uninterruptible power supply and battery sharing system has the advantages that the circuit structure is simple, cost is low, the machine capacity and the machine type are not strictly required, a configured battery only needs to be reasonable, the control logic is simple and reliable, the utilization rate of a storage battery in a redundant UPS is improved, and the standby time of equipment is prolonged.

Description

Uninterrupted power supply battery sharing system and control method thereof

Technical field

The present invention relates to uninterrupted power supply battery sharing field, especially a kind of uninterrupted power supply battery sharing system and control method thereof.

Background technology

Modern data center etc. require higher place to be all equipped with uninterrupted power supply to the quality of power supply, in order further to improve the reliability of electric power system, conventionally adopt multi-machine parallel connection redundancy or N+X redundant technique, provide electric energy by two or more UPS.Conventional batteries configuration mode is, every UPS is all equipped with independently battery pack, in the time of certain UPS fault, the battery being equipped with it also dull need not, reduced the utilance of storage battery.Especially the long occasion of the preparation time of super high power, the input cost of battery of its outfit is by quite even higher with the cost of UPS complete machine.The solution of being badly in need of wanting a kind of multi-machine shared battery pack, while making UPS multi-computer Redundancy, needed battery pack demand can reduce.When many UPS use simultaneously, after certain UPS hostdown, it is joined battery pack and can be other UPS main frame the function of reserve battery is provided, and increases its preparation time, improves system reliability.

Existing CB common battery prescription case mainly comprises by battery pack provides the method for energy by speed-sensitive switch timesharing for different inversion systems; The each battery set charge/discharge of each UPS coordinated management and protection logic; By the method for the each system busbar of single-way switch device isolation.These methods can both realize the function of battery pack function, but its control program complexity, and need to solve the various challenges of circulation between battery current-sharing and UPS, these issue handlings are bad, must increase the danger of fault point, and implementation method complexity, maintenance cost is higher.

In patent 201010131241.1 in the shared scheme of the battery pack of telling, the control of battery discharging is comparatively complicated, needs formation control loop separately to realize the otherness of storage battery to every UPS function; The charge function of storage battery is also needed to solve to the problem of not current-sharing, the problems such as the non-isolation of bus, may occur that certain separate unit UPS charge circuit bears many UPS loads, the danger that finally causes all UPS to shut down because cell voltage is too low.

Patent 201010158022.2 also needs to solve many UPS main frames simultaneously for the uneven flow problem of CB common battery group charging, needs the work such as design and checking of more control algolithm on the basis of original UPS design.

Although 201010197880.8 simply isolate the UPS main frame of CB common battery group with one-way conduction unit, reduce the scope that fault point expands, but do not stop the risk that fault point expands completely, the uneven flow problem of busbar charging still exists, and need to increase respective algorithms and carry out sharing control.

Summary of the invention

In view of this, the object of this invention is to provide a kind of uninterrupted power supply battery sharing system and control method thereof, for improving the utilance of battery pack in redundancy UPS, the extension device standby time, circuit structure is simple, cost is low, and without challenges such as circulation between solution battery current-sharing and UPS, control method is simple, do not increase the danger of system failure point, possess the battery sharing system of reliable high property.

The present invention adopts following scheme to realize: a kind of uninterrupted power supply battery sharing system, is characterized in that: comprise the first commutation circuit, the second commutation circuit, the 3rd commutation circuit, the first voltage sampling circuit, second voltage sample circuit, tertiary voltage sample circuit, the 4th voltage sampling circuit and control module;

Described control module connects described the first commutation circuit control end, described the second commutation circuit control end, described the 3rd commutation circuit control end, a UPS host computer control end and the 2nd UPS host computer control end, and described control module also connects described the first voltage sampling circuit output, described second voltage sample circuit output, described tertiary voltage sample circuit output and described the 4th voltage sampling circuit output;

A described UPS main frame bus connects described the first voltage sampling circuit input and described first commutation circuit one end, and the described first commutation circuit other end connects described second voltage sample circuit input, described the 3rd commutation circuit one end and a UPS storage battery;

Described the 2nd UPS main frame bus connects described tertiary voltage sample circuit input and described second commutation circuit one end, and the described second commutation circuit other end connects described the 4th voltage sampling circuit input, described the 3rd commutation circuit other end and the 2nd UPS storage battery;

Described the first commutation circuit comprises the first main switch and the first buffer circuit in parallel, and described the first buffer circuit is in series by the first auxiliary switch and the first buffer resistance; Described the second commutation circuit comprises the second main switch and the second buffer circuit in parallel, and described the second buffer circuit is in series by the second auxiliary switch and the second buffer resistance; The 3rd described commutation circuit is made up of the 3rd main switch.

In an embodiment of the present invention, described the 3rd commutation circuit also comprises that one is connected in parallel on the 3rd buffer circuit at described the 3rd main switch two ends, and described the 3rd buffer circuit is in series by the 3rd auxiliary switch and the 3rd buffer resistance.

The present invention also provides a kind of control method of uninterrupted power supply battery sharing system, it is characterized in that, described control module monitoring the one UPS main frame and the 2nd UPS main frame running status, be used for judging that whether a UPS battery discharging loop and the 2nd UPS battery discharging loop be normal, and according to a UPS main frame busbar voltage, the 2nd UPS main frame busbar voltage, the first main switch and first auxiliary switch of the one UPS battery tension and the 2nd UPS storage battery pressure-controlled the first commutation circuit, the operating state of the 3rd main switch of the second main switch of the second commutation circuit and the second auxiliary switch and the 3rd commutation circuit, concrete steps are as follows:

Step S11: the running status of monitoring in real time a UPS storage battery and the 2nd UPS storage battery, and according to battery condition monitored results, battery condition is masked as to " 00 ", " 01 ", " 10 " or " 11 ", when a UPS storage battery is under-voltage and the 2nd UPS storage battery is under-voltage, battery condition is masked as " 00 "; When a UPS storage battery is under-voltage and the 2nd UPS storage battery is not under-voltage, battery condition is masked as " 01 ", when a UPS storage battery is not under-voltage and the 2nd UPS storage battery is under-voltage, battery condition is masked as " 10 ", when a UPS storage battery is not under-voltage and the 2nd UPS storage battery is not under-voltage, battery condition is masked as " 11 ", enters step S12;

Step S12: judge that whether battery condition mark is " 00 ", if battery condition is masked as " 00 ", finishes; Otherwise enter step S13;

Step S13: monitor in real time a UPS battery discharging loop and the 2nd UPS battery discharging loop state, and according to battery discharging loop state monitored results, battery discharging loop state is masked as to " 00 ", " 01 ", " 10 " or " 11 ", when a UPS battery discharging loop is abnormal and the 2nd UPS battery discharging loop is abnormal, battery discharging loop state is masked as " 00 ", when a UPS battery discharging loop is abnormal and the 2nd UPS battery discharging loop is normal, battery discharging loop state is masked as " 01 ", when a UPS battery discharging loop is normal and the 2nd UPS battery discharging loop is abnormal, battery discharging loop state is masked as " 10 ", when a UPS battery discharging loop is normal and the 2nd UPS battery discharging loop is normal, battery discharging loop state is masked as " 11 ", enter step S14,

Step S14: judge that whether battery discharging loop state mark is " 00 ", if battery discharging loop state is masked as " 00 ", finishes; Otherwise enter step S15;

Step S15: judge that whether battery discharging loop state mark is " 11 ", if battery discharging loop state is masked as " 11 ", finishes; Otherwise enter step S16;

Step S16: judge that whether battery condition mark is identical with battery discharging loop state mark, if identical, finishes; Otherwise enter step S17;

Step S17: judge that whether battery discharging loop state mark is " 10 ", if battery discharging loop state is masked as " 10 ", enters step S111; Otherwise enter step S18;

Step S18: a UPS storage battery is switched to the 2nd UPS main frame and used, enter step S19;

Step S19: judge that whether a UPS battery discharging loop is abnormal, if a UPS battery discharging loop is abnormal, finish, otherwise enter step S110;

Step S110, connects the shared UPS main frame that switches to by a UPS storage battery from the 2nd UPS main frame and uses, and finish;

Step S111: the 2nd UPS storage battery is switched to a UPS main frame and used, enter step S112;

Step S112: judge that whether the 2nd UPS battery discharging loop is abnormal, if the 2nd UPS battery discharging loop is abnormal, finish, otherwise enter step S113;

Step S113, connects shared the 2nd UPS main frame that switches to by the 2nd UPS storage battery from a UPS main frame and uses, and finish;

Wherein, in step S18, a UPS storage battery is switched to the 2nd UPS main frame and used, specific implementation step is: step S18-01, disconnect the first main switch, and make it in off-state, the first auxiliary switch remains open state; Step S18-02, conducting the 3rd main switch, makes it in conducting state;

Wherein, in step S111, the 2nd UPS storage battery is switched to a UPS main frame and used, specific implementation step is: step S111-01, disconnect the second main switch, and make it in off-state, the second auxiliary switch remains open state; Step S111-02, conducting the 3rd main switch, makes it in conducting state.

In an embodiment of the present invention, in described step S110, a UPS storage battery is connected to the shared UPS main frame that switches to from the 2nd UPS main frame and use, specific implementation step is:

Step S110-01, disconnects the 3rd main switch, makes it in off-state; Step S110-02, conducting the first auxiliary switch, makes it in conducting state, opens the first buffer circuit; Step S110-03, after continuing for some time, first conducting the first main switch, makes it in conducting state; Rear disconnection the first auxiliary switch, makes it in off-state;

In described step S113, the 2nd UPS storage battery is connected to shared the 2nd UPS main frame that switches to from a UPS main frame and use, specific implementation step is:

Step S113-01, disconnects the 3rd main switch, makes it in off-state; Step S113-02, conducting the second auxiliary switch, makes it in conducting state, opens the second buffer circuit; Step S113-03, after continuing for some time, first conducting the second main switch, makes it in conducting state; Rear disconnection the second auxiliary switch, makes it in off-state.

Step S110-11, disconnects the 3rd main switch, makes it in off-state; Step S110-12, judges whether the voltage difference of a UPS main frame bus and a UPS storage battery is more than or equal to voltage difference threshold value; If so, enter step S110-13, otherwise enter step S110-15; Step S110-13, conducting the first auxiliary switch, makes it in conducting state, opens the first buffer circuit, enters step S110-14; Step S110-14, after continuing for some time, first conducting the first main switch, makes it in conducting state; Rear disconnection the first auxiliary switch, makes it in off-state; Step S110-15, conducting the first main switch, makes it in conducting state, and the first auxiliary switch remains open state;

Step S113-11, disconnects the 3rd main switch, makes it in off-state; Step S113-12, judges whether the voltage difference of the 2nd UPS main frame bus and the 2nd UPS storage battery is more than or equal to voltage difference threshold value; If so, enter step S113-13, otherwise enter step S113-15; Step S113-13, conducting the second auxiliary switch, makes it in conducting state, opens the second buffer circuit; Step S113-14, after continuing for some time, first conducting the second main switch, makes it in conducting state; Rear disconnection the second auxiliary switch, makes it in off-state; Step S113-15, conducting the second main switch, makes it in conducting state, and the second auxiliary switch remains open state.

The present invention provides a kind of control method of uninterrupted power supply battery sharing system in addition, described control module monitoring the one UPS main frame and the 2nd UPS main frame running status, be used for judging that whether a UPS battery discharging loop and the 2nd UPS battery discharging loop be normal, and according to a UPS main frame busbar voltage, the 2nd UPS main frame busbar voltage, the first main switch and first auxiliary switch of the one UPS battery tension and the 2nd UPS storage battery pressure-controlled the first commutation circuit, the 3rd main switch of the second main switch of the second commutation circuit and the second auxiliary switch and the 3rd commutation circuit and the operating state of the 3rd auxiliary switch, concrete steps are as follows:

Step S21: the running status of monitoring in real time a UPS storage battery and the 2nd UPS storage battery, and according to battery condition monitored results, battery condition is masked as to " 00 ", " 01 ", " 10 " or " 11 ", when a UPS storage battery is under-voltage and the 2nd UPS storage battery is under-voltage, battery condition is masked as " 00 "; When a UPS storage battery is under-voltage and the 2nd UPS storage battery is not under-voltage, battery condition is masked as " 01 ", when a UPS storage battery is not under-voltage and the 2nd UPS storage battery is under-voltage, battery condition is masked as " 10 ", when a UPS storage battery is not under-voltage and the 2nd UPS storage battery is not under-voltage, battery condition is masked as " 11 ", enters step S22;

Step S22: judge that whether battery condition mark is " 00 ", if battery condition is masked as " 00 ", finishes; Otherwise enter step S23;

Step S23: monitor in real time a UPS battery discharging loop and the 2nd UPS battery discharging loop state, and according to battery discharging loop state monitored results, battery discharging loop state is masked as to " 00 ", " 01 ", " 10 " or " 11 ", when a UPS battery discharging loop is abnormal and the 2nd UPS battery discharging loop is abnormal, battery discharging loop state is masked as " 00 ", when a UPS battery discharging loop is abnormal and the 2nd UPS battery discharging loop is normal, battery discharging loop state is masked as " 01 ", when a UPS battery discharging loop is normal and the 2nd UPS battery discharging loop is abnormal, battery discharging loop state is masked as " 10 ", when a UPS battery discharging loop is normal and the 2nd UPS battery discharging loop is normal, battery discharging loop state is masked as " 11 ", enter step S24,

Step S24: judge that whether battery discharging loop state mark is " 00 ", if battery discharging loop state is masked as " 00 ", finishes; Otherwise enter step S25;

Step S25: judge that whether battery discharging loop state mark is " 11 ", if battery discharging loop state is masked as " 11 ", finishes; Otherwise enter step S26;

Step S26: judge that whether battery condition mark is identical with battery discharging loop state mark, if identical, finishes; Otherwise enter step S27;

Step S27: judge whether battery discharging loop state mark is " 10 ", if battery discharging loop state is masked as " 10 ", step S211; Otherwise enter step S28;

Step S28: a UPS storage battery is switched to the 2nd UPS main frame and used, enter step S29;

Step S29: judge that whether a UPS battery discharging loop is abnormal, if a UPS battery discharging loop is abnormal, finish, otherwise enter step S210;

Step S210, connects the shared UPS main frame that switches to by a UPS storage battery from the 2nd UPS main frame and uses, and finish;

Step S211: the 2nd UPS storage battery is switched to a UPS main frame and used, enter step S212;

Step S212: judge that whether the 2nd UPS battery discharging loop is abnormal, if the 2nd UPS battery discharging loop is abnormal, finish, otherwise enter step S213;

Step S213, connects shared the 2nd UPS main frame that switches to by the 2nd UPS storage battery from a UPS main frame and uses, and finish.

In an embodiment of the present invention, in described step S28, a UPS storage battery is switched to the 2nd UPS main frame and used, specific implementation step is:

Step S28-11, disconnects the first main switch, makes it in off-state, and the first auxiliary switch remains open state; Step S28-12, conducting the 3rd auxiliary switch, makes it in conducting state, opens the 3rd buffer circuit; Step S28-13, after continuing for some time, first conducting the 3rd main switch, makes it in conducting state; Rear disconnection the 3rd auxiliary switch, makes it in off-state;

In described step S211, the 2nd UPS storage battery is switched to a UPS main frame and used, specific implementation step is:

Step S211-11, disconnects the second main switch, makes it in off-state, and the second auxiliary switch remains open state; Step S211-12, conducting the 3rd auxiliary switch, makes it in conducting state, opens the 3rd buffer circuit; Step S211-13, after continuing for some time, first conducting the 3rd main switch, makes it after conducting state, and rear disconnection the 3rd auxiliary switch, makes it in off-state.

Step S28-21, disconnects the first main switch, makes it in off-state, and the first auxiliary switch remains open state; Step S28-22, judges whether the voltage difference of a UPS storage battery and the 2nd UPS storage battery is more than or equal to voltage difference threshold value; If so, enter step S28-23, otherwise enter step S28-25; Step S28-23, conducting the 3rd auxiliary switch, makes it in conducting state, opens the 3rd buffer circuit; Step S28-24, after continuing for some time, first conducting the 3rd main switch, makes it in conducting state; Rear disconnection the 3rd auxiliary switch, makes it in off-state; Step S28-25, conducting the 3rd main switch, makes it in conducting state, and the 3rd auxiliary switch remains open state;

Step S211-21, disconnects the second main switch, makes it in off-state, and the second auxiliary switch remains open state; Step S211-22, judges whether the voltage difference of a UPS storage battery and the 2nd UPS storage battery is more than or equal to voltage difference threshold value; If so, enter step S28-23, otherwise enter step S28-25; Step S211-23, conducting the 3rd auxiliary switch, makes it in conducting state, opens the 3rd buffer circuit; Step S211-24, after continuing for some time, first conducting the 3rd main switch, makes it in conducting state; Rear disconnection the 3rd auxiliary switch, makes it in off-state; Step S211-25, conducting the 3rd main switch, makes it in conducting state, and the 3rd auxiliary switch remains open state.

In an embodiment of the present invention, in described step S210, a UPS storage battery is connected to the shared UPS main frame that switches to from the 2nd UPS main frame and use, specific implementation step is:

Step S210-21, disconnects the 3rd main switch, makes it in off-state, and the 3rd auxiliary switch remains open state; Step S210-22, conducting the first auxiliary switch, makes it in conducting state, opens the first buffer circuit; Step S210-23, after continuing for some time, first conducting the first main switch, makes it in conducting state; Rear disconnection the first auxiliary switch, makes it in off-state;

In described step S213, the 2nd UPS storage battery is connected to shared the 2nd UPS main frame that switches to from a UPS main frame and use, specific implementation step is:

Step S213-11, disconnects the 3rd main switch, makes it in off-state, and the 3rd auxiliary switch remains open state; Step S213-12, conducting the second auxiliary switch, makes it in conducting state, opens the second buffer circuit; Step S213-13, after continuing for some time, first conducting the second main switch, makes it in conducting state; Rear disconnection the second auxiliary switch, makes it in off-state.

Step S210-31, disconnects the 3rd main switch, makes it in off-state, and the 3rd auxiliary switch remains open state; Step S210-32, judges whether the voltage difference of a UPS main frame bus and a UPS storage battery is more than or equal to voltage difference threshold value; If so, enter step S210-33; Step S210-33, conducting the first auxiliary switch, makes it in conducting state, opens the first buffer circuit; Step S210-34, after continuing for some time, first conducting the first main switch, makes it in conducting state; Rear disconnection the first auxiliary switch, makes it in off-state; Step S210-35, conducting the first main switch, makes it in conducting state, and the first auxiliary switch remains open state;

Step S213-21, disconnects the 3rd main switch, makes it in off-state, and the 3rd auxiliary switch remains open; Step S213-22, judges whether the voltage difference of the 2nd UPS main frame bus and the 2nd UPS storage battery is more than or equal to voltage difference threshold value; If so, enter step S213-23; Step S213-23, conducting the second auxiliary switch, makes it in conducting state, opens the second buffer circuit; Step S213-24, after continuing for some time, first conducting the second main switch, makes it in conducting state; Rear disconnection the second auxiliary switch, makes it in off-state; Step S213-25, conducting the second main switch, makes it in conducting state, and the second auxiliary switch remains open state.

Compared with prior art, beneficial effect of the present invention is embodied in:

1, uninterrupted power supply battery sharing system of the present invention, possesses that circuit structure is simple, cost is low, to machine capacity, type, without too strict requirement, only needs the battery of configuration rationally, and control logic is simple and reliable, improve the utilance of storage battery in redundancy UPS, the extension device standby time.

2, in uninterrupted power supply battery sharing system of the present invention, operating state by rational diverter switch logic control first to the 3rd commutation circuit, the bus that has ensured a UPS and the 2nd UPS is isolated completely, UPS main frame type to participation CB common battery group is unrestricted, stop the fault that bus circulation causes, without considering heat radiation, the problems such as not current-sharing, reduce and controlled complicated control logic and the control algolithm that equalizing charge electric current brings, can not introduce new fault point, can effectively avoid causing due to the shared function of introducing battery pack the possibility of the further expansion of fault, ensure to participate in the reliability of the shared UPS main frame of battery pack.

3, control method of the present invention, in the time not starting battery sharing function, be independent of each other for charge in batteries, corresponding UPS gives corresponding charge in batteries, in the time that storage battery is switched to another UPS main frame use, this UPS main frame can be given two UPS charge in batteries simultaneously, has guaranteed battery makeup energy in time.Meanwhile, battery sharing system, does not affect UPS and normally works.

4, increase necessary buffer circuit, prevent due to the excessive impact to circuit or device of pressure reduction.

For making object of the present invention, technical scheme and advantage clearer, below will, by specific embodiment and relevant drawings, the present invention be described in further detail.

Brief description of the drawings

Fig. 1 is system principle diagram of the present invention.

Fig. 2 is system principle diagram in first embodiment of the invention.

Fig. 3 is control method flow chart in first embodiment of the invention.

Fig. 4 is step S11 flow chart in first embodiment of the invention.

Fig. 5 is step S13 flow chart in first embodiment of the invention.

Fig. 6 is step S18 flow chart in first embodiment of the invention.

Fig. 7 is step S110 the first method flow diagram in first embodiment of the invention.

Fig. 8 is step S110 the second method flow diagram in first embodiment of the invention.

Fig. 9 is step S111 flow chart in first embodiment of the invention.

Figure 10 is step S113 the first method flow diagram in first embodiment of the invention.

Figure 11 is step S113 the second method flow diagram in first embodiment of the invention.

Figure 12 is system principle diagram in second embodiment of the invention.

Figure 13 is step S28 the first method flow diagram in second embodiment of the invention.

Figure 14 is step S28 the second method flow diagram in second embodiment of the invention.

Figure 15 is step S210 the first method flow diagram in second embodiment of the invention.

Figure 16 is step S210 the second method flow diagram in second embodiment of the invention.

Figure 17 is step S211 the first method flow diagram in second embodiment of the invention.

Figure 18 is step S211 the second method flow diagram in second embodiment of the invention.

Figure 19 is step S213 the first method flow diagram in second embodiment of the invention.

Figure 20 is step S213 the second method flow diagram in second embodiment of the invention.

Embodiment

embodiment 1

As depicted in figs. 1 and 2, the invention provides a kind of uninterrupted power supply battery sharing system and comprise the first commutation circuit 12, the second commutation circuit 22, the 3rd commutation circuit 36, the first voltage sampling circuit 31, second voltage sample circuit 32, tertiary voltage sample circuit 33, the 4th voltage sampling circuit 34 and control module 35;

Described control module connects described the first commutation circuit control end, described the second commutation circuit control end, described the 3rd commutation circuit control end, UPS main frame 11 control ends and the 2nd UPS main frame 21 control ends, and described control module also connects described the first voltage sampling circuit output, described second voltage sample circuit output, described tertiary voltage sample circuit output and described the 4th voltage sampling circuit output;

A described UPS main frame bus connects described the first voltage sampling circuit input and described first commutation circuit one end, and the described first commutation circuit other end connects described second voltage sample circuit input, described the 3rd commutation circuit one end and a UPS storage battery 13;

Described the 2nd UPS main frame bus connects described tertiary voltage sample circuit input and described second commutation circuit one end, and the described second commutation circuit other end connects described the 4th voltage sampling circuit input, described the 3rd commutation circuit other end and the 2nd UPS storage battery 23;

Described the first commutation circuit comprises the first main switch SW1 and the first buffer circuit in parallel, and described the first buffer circuit is in series by the first auxiliary switch S1 and the first buffer resistance R1; Described the second commutation circuit comprises the second main switch SW2 and the second buffer circuit in parallel, and described the second buffer circuit is in series by the second auxiliary switch S2 and the second buffer resistance R2; The 3rd described commutation circuit is made up of the 3rd main switch SW3.

Wherein the first buffer circuit, excessive for preventing the first main switch SW1 two ends pressure reduction, before the first main switch SW1 conducting, can first realize the balance of voltage to the first main switch SW1 two ends by the first buffer circuit, the second buffer circuit, excessive for preventing the second main switch SW2 two ends pressure reduction, before the second main switch SW2 conducting, can first realize the balance of voltage to the second main switch SW2 two ends by the second buffer circuit.The 3rd buffer circuit, excessive for preventing the 3rd main switch SW3 two ends pressure reduction, before the 3rd main switch SW3 conducting, can first realize the balance of voltage to the 3rd main switch SW3 two ends by the 3rd buffer circuit.The first main switch SW1, the second main switch SW2 and the 3rd main switch SW3 adopt high-power contactor (also can adopt high-power thyristor to coordinate suitable heat abstractor).

As shown in Figure 3, the present invention also provides a kind of control method of (as shown in Figure 1) uninterrupted power supply battery sharing system, described control module monitoring the one UPS main frame and the 2nd UPS main frame running status, be used for judging that whether a UPS battery discharging loop and the 2nd UPS battery discharging loop be normal, and according to a UPS main frame busbar voltage, the 2nd UPS main frame busbar voltage, the first main switch SW1 of the one UPS battery tension and the 2nd UPS storage battery pressure-controlled the first commutation circuit and the first auxiliary switch S1, the operating state of the 3rd main switch SW3 of the second main switch SW2 of the second commutation circuit and the second auxiliary switch S2 and the 3rd commutation circuit, concrete steps are as follows:

Step S11: as shown in Figure 4, the running status of monitoring the one UPS storage battery and the 2nd UPS storage battery in real time, and according to battery condition monitored results, battery condition is masked as to " 00 ", " 01 ", " 10 " or " 11 ", when a UPS storage battery is under-voltage and the 2nd UPS storage battery is under-voltage, battery condition is masked as " 00 "; When a UPS storage battery is under-voltage and the 2nd UPS storage battery is not under-voltage, battery condition is masked as " 01 ", when a UPS storage battery is not under-voltage and the 2nd UPS storage battery is under-voltage, battery condition is masked as " 10 ", when a UPS storage battery is not under-voltage and the 2nd UPS storage battery is not under-voltage, battery condition is masked as " 11 ", enters step S12;

Step S13: as shown in Figure 5, monitoring the one UPS battery discharging loop and the 2nd UPS battery discharging loop state in real time, and according to battery discharging loop state monitored results, battery discharging loop state is masked as to " 00 ", " 01 ", " 10 " or " 11 ", when a UPS battery discharging loop is abnormal and the 2nd UPS battery discharging loop is abnormal, battery discharging loop state is masked as " 00 ", when a UPS battery discharging loop is abnormal and the 2nd UPS battery discharging loop is normal, battery discharging loop state is masked as " 01 ", when a UPS battery discharging loop is normal and the 2nd UPS battery discharging loop is abnormal, battery discharging loop state is masked as " 10 ", when a UPS battery discharging loop is normal and the 2nd UPS battery discharging loop is normal, battery discharging loop state is masked as " 11 ", enter step S14,

Wherein, as shown in Figure 6, in step S18, a UPS storage battery is switched to the 2nd UPS main frame and used, specific implementation step is: step S18-01, disconnect the first main switch SW1, and make it in off-state, the first auxiliary switch S1 remains open state; Step S18-02, conducting the 3rd main switch SW3, makes it in conducting state;

Wherein, as shown in Figure 9, in step S111, the 2nd UPS storage battery is switched to a UPS main frame and used, specific implementation step is: step S111-01, disconnect the second main switch SW2, and make it in off-state, the second auxiliary switch S2 remains open state; Step S111-02, conducting the 3rd main switch SW3, makes it in conducting state.

As shown in Figure 7, in described step S110, a UPS storage battery is connected to the shared UPS main frame that switches to from the 2nd UPS main frame and use, specific implementation step is:

Step S110-01, disconnects the 3rd main switch SW3, makes it in off-state; Step S110-02, conducting the first auxiliary switch S1, makes it in conducting state, opens the first buffer circuit; Step S110-03, after continuing for some time, first conducting the first main switch SW1, makes it in conducting state; Rear disconnection the first auxiliary switch S1, makes it in off-state;

As shown in figure 10, in described step S113, the 2nd UPS storage battery is connected to shared the 2nd UPS main frame that switches to from a UPS main frame and use, specific implementation step is:

Step S113-01, disconnects the 3rd main switch SW3, makes it in off-state; Step S113-02, conducting the second auxiliary switch S2, makes it in conducting state, opens the second buffer circuit; Step S113-03, after continuing for some time, first conducting the second main switch SW2, makes it in conducting state; Rear disconnection the second auxiliary switch S2, makes it in off-state.

As shown in Figure 8, in described step S110, a UPS storage battery is connected to the shared UPS main frame that switches to from the 2nd UPS main frame and use, specific implementation step is:

Step S110-11, disconnects the 3rd main switch SW3, makes it in off-state; Step S110-12, judges whether the voltage difference of a UPS main frame bus and a UPS storage battery is more than or equal to voltage difference threshold value; If so, enter step S110-13, otherwise enter step S110-15; Step S110-13, conducting the first auxiliary switch S1, makes it in conducting state, opens the first buffer circuit, enters step S110-14; Step S110-14, after continuing for some time, first conducting the first main switch SW1, makes it in conducting state; Rear disconnection the first auxiliary switch S1, makes it in off-state; Step S110-15, conducting the first main switch SW1, makes it in conducting state, and the first auxiliary switch S1 remains open state;

As shown in figure 11, in described step S113, the 2nd UPS storage battery is connected to shared the 2nd UPS main frame that switches to from a UPS main frame and use, specific implementation step is:

Step S113-11, disconnects the 3rd main switch SW3, makes it in off-state; Step S113-12, judges whether the voltage difference of the 2nd UPS main frame bus and the 2nd UPS storage battery is more than or equal to voltage difference threshold value; If so, enter step S113-13, otherwise enter step S113-15; Step S113-13, conducting the second auxiliary switch S2, makes it in conducting state, opens the second buffer circuit; Step S113-14, after continuing for some time, first conducting the second main switch SW2, makes it in conducting state; Rear disconnection the second auxiliary switch S2, makes it in off-state; Step S113-15, conducting the second main switch SW2, makes it in conducting state, and the second auxiliary switch S2 remains open state.

embodiment 2

As shown in figure 12, the invention provides a kind of uninterrupted power supply battery sharing system and comprise the first commutation circuit, the second commutation circuit, the 3rd commutation circuit, the first voltage sampling circuit, second voltage sample circuit, tertiary voltage sample circuit, the 4th voltage sampling circuit and control module;

Described the first commutation circuit comprises the first main switch SW1 and the first buffer circuit in parallel, and described the first buffer circuit is in series by the first auxiliary switch S1 and the first buffer resistance R1; Described the second commutation circuit comprises the second main switch SW2 and the second buffer circuit in parallel, and described the second buffer circuit is in series by the second auxiliary switch S2 and the second buffer resistance R2; The 3rd described commutation circuit is made up of the 3rd main switch SW3; Described the 3rd commutation circuit also comprises that one is connected in parallel on the 3rd buffer circuit at described the 3rd main switch SW3 two ends, and described the 3rd buffer circuit is in series by the 3rd auxiliary switch S3 and the 3rd buffer resistance R3.

The present invention also provides a kind of control method of (as shown in figure 12) uninterrupted power supply battery sharing system in addition, described control module monitoring the one UPS main frame and the 2nd UPS main frame running status, be used for judging that whether a UPS battery discharging loop and the 2nd UPS battery discharging loop be normal, and according to a UPS main frame busbar voltage, the 2nd UPS main frame busbar voltage, the first main switch SW1 of the one UPS battery tension and the 2nd UPS storage battery pressure-controlled the first commutation circuit and the first auxiliary switch S1, the 3rd main switch SW3 of the second main switch SW2 of the second commutation circuit and the second auxiliary switch S2 and the 3rd commutation circuit and the operating state of the 3rd auxiliary switch S3, concrete steps are as follows:

Step S21: as shown in Figure 4, the running status of monitoring the one UPS storage battery and the 2nd UPS storage battery in real time, and according to battery condition monitored results, battery condition is masked as to " 00 ", " 01 ", " 10 " or " 11 ", when a UPS storage battery is under-voltage and the 2nd UPS storage battery is under-voltage, battery condition is masked as " 00 "; When a UPS storage battery is under-voltage and the 2nd UPS storage battery is not under-voltage, battery condition is masked as " 01 ", when a UPS storage battery is not under-voltage and the 2nd UPS storage battery is under-voltage, battery condition is masked as " 10 ", when a UPS storage battery is not under-voltage and the 2nd UPS storage battery is not under-voltage, battery condition is masked as " 11 ", enters step S22;

Step S23: as shown in Figure 5, monitoring the one UPS battery discharging loop and the 2nd UPS battery discharging loop state in real time, and according to battery discharging loop state monitored results, battery discharging loop state is masked as to " 00 ", " 01 ", " 10 " or " 11 ", when a UPS battery discharging loop is abnormal and the 2nd UPS battery discharging loop is abnormal, battery discharging loop state is masked as " 00 ", when a UPS battery discharging loop is abnormal and the 2nd UPS battery discharging loop is normal, battery discharging loop state is masked as " 01 ", when a UPS battery discharging loop is normal and the 2nd UPS battery discharging loop is abnormal, battery discharging loop state is masked as " 10 ", when a UPS battery discharging loop is normal and the 2nd UPS battery discharging loop is normal, battery discharging loop state is masked as " 11 ", enter step S24,

As shown in figure 13, in described step S28, a UPS storage battery is switched to the 2nd UPS main frame and used, specific implementation step is:

Step S28-11, disconnects the first main switch SW1, makes it in off-state, and the first auxiliary switch S1 remains open state; Step S28-12, conducting the 3rd auxiliary switch S3, makes it in conducting state, opens the 3rd buffer circuit; Step S28-13, after continuing for some time, first conducting the 3rd main switch SW3, makes it in conducting state; Rear disconnection the 3rd auxiliary switch S3, makes it in off-state;

As shown in figure 17, in described step S211, the 2nd UPS storage battery is switched to a UPS main frame and used, specific implementation step is:

Step S211-11, disconnects the second main switch SW2, makes it in off-state, and the second auxiliary switch S2 remains open state; Step S211-12, conducting the 3rd auxiliary switch S3, makes it in conducting state, opens the 3rd buffer circuit; Step S211-13, after continuing for some time, first conducting the 3rd main switch, makes it after conducting state, and rear disconnection the 3rd auxiliary switch S3, makes it in off-state.

As shown in figure 14, in described step S28, a UPS storage battery is switched to the 2nd UPS main frame and used, specific implementation step is:

Step S28-21, disconnects the first main switch SW1, makes it in off-state, and the first auxiliary switch S1 remains open state; Step S28-22, judges whether the voltage difference of a UPS storage battery and the 2nd UPS storage battery is more than or equal to voltage difference threshold value; If so, enter step S28-23, otherwise enter step S28-25; Step S28-23, conducting the 3rd auxiliary switch S3, makes it in conducting state, opens the 3rd buffer circuit; Step S28-24, after continuing for some time, first conducting the 3rd main switch SW3, makes it in conducting state; Rear disconnection the 3rd auxiliary switch S3, makes it in off-state; Step S28-25, conducting the 3rd main switch SW3, makes it in conducting state, and the 3rd auxiliary switch S3 remains open state;

As shown in figure 18, in described step S211, the 2nd UPS storage battery is switched to a UPS main frame and used, specific implementation step is:

Step S211-21, disconnects the second main switch SW2, makes it in off-state, and the second auxiliary switch S2 remains open state; Step S211-22, judges whether the voltage difference of a UPS storage battery and the 2nd UPS storage battery is more than or equal to voltage difference threshold value; If so, enter step S28-23, otherwise enter step S28-25; Step S211-23, conducting the 3rd auxiliary switch S3, makes it in conducting state, opens the 3rd buffer circuit; Step S211-24, after continuing for some time, first conducting the 3rd main switch SW3, makes it in conducting state; Rear disconnection the 3rd auxiliary switch S3, makes it in off-state; Step S211-25, conducting the 3rd main switch SW3, makes it in conducting state, and the 3rd auxiliary switch S3 remains open state.

As shown in figure 15, in described step S210, a UPS storage battery is connected to the shared UPS main frame that switches to from the 2nd UPS main frame and use, specific implementation step is:

Step S210-21, disconnects the 3rd main switch SW3, makes it in off-state, and the 3rd auxiliary switch S3 remains open state; Step S210-22, conducting the first auxiliary switch S1, makes it in conducting state, opens the first buffer circuit; Step S210-23, after continuing for some time, first conducting the first main switch, makes it in conducting state; Rear disconnection the first auxiliary switch S1, makes it in off-state;

As shown in figure 19, in described step S213, the 2nd UPS storage battery is connected to shared the 2nd UPS main frame that switches to from a UPS main frame and use, specific implementation step is:

Step S213-11, disconnects the 3rd main switch SW3, makes it in off-state, and the 3rd auxiliary switch S3 remains open state; Step S213-12, conducting the second auxiliary switch S2, makes it in conducting state, opens the second buffer circuit; Step S213-13, after continuing for some time, first conducting the second main switch SW2, makes it in conducting state; Rear disconnection the second auxiliary switch S2, makes it in off-state.

As shown in figure 16, in described step S210, a UPS storage battery is connected to the shared UPS main frame that switches to from the 2nd UPS main frame and use, specific implementation step is:

Step S210-31, disconnects the 3rd main switch SW3, makes it in off-state, and the 3rd auxiliary switch S3 remains open state; Step S210-32, judges whether the voltage difference of a UPS main frame bus and a UPS storage battery is more than or equal to voltage difference threshold value; If so, enter step S210-33; Step S210-33, conducting the first auxiliary switch S1, makes it in conducting state, opens the first buffer circuit; Step S210-34, after continuing for some time, first conducting the first main switch SW1, makes it in conducting state; Rear disconnection the first auxiliary switch S1, makes it in off-state; Step S210-35, conducting the first main switch SW1, makes it in conducting state, and the first auxiliary switch S1 remains open state;

As shown in figure 20, in described step S213, the 2nd UPS storage battery is connected to shared the 2nd UPS main frame that switches to from a UPS main frame and use, specific implementation step is:

Step S213-21, disconnects the 3rd main switch SW3, makes it in off-state, and the 3rd auxiliary switch S3 remains open; Step S213-22, judges whether the voltage difference of the 2nd UPS main frame bus and the 2nd UPS storage battery is more than or equal to voltage difference threshold value; If so, enter step S213-23; Step S213-23, conducting the second auxiliary switch S2, makes it in conducting state, opens the second buffer circuit; Step S213-24, after continuing for some time, first conducting the second main switch SW2, makes it in conducting state; Rear disconnection the second auxiliary switch S2, makes it in off-state; Step S213-25, conducting the second main switch SW2, makes it in conducting state, and the second auxiliary switch S2 remains open state.

When specific works, control according to UPS main frame and UPS battery condition, system can work in following several state, as shown in the table

above-listed preferred embodiment; the object, technical solutions and advantages of the present invention are further described; institute is understood that; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention; within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims

1. a uninterrupted power supply battery sharing system, is characterized in that: comprise the first commutation circuit, the second commutation circuit, the 3rd commutation circuit, the first voltage sampling circuit, second voltage sample circuit, tertiary voltage sample circuit, the 4th voltage sampling circuit and control module;

2. uninterrupted power supply battery sharing system according to claim 1, it is characterized in that: described the 3rd commutation circuit also comprises that one is connected in parallel on the 3rd buffer circuit at described the 3rd main switch two ends, and described the 3rd buffer circuit is in series by the 3rd auxiliary switch and the 3rd buffer resistance.

3. the control method of a uninterrupted power supply battery sharing system as claimed in claim 1, it is characterized in that, described control module monitoring the one UPS main frame and the 2nd UPS main frame running status, be used for judging that whether a UPS battery discharging loop and the 2nd UPS battery discharging loop be normal, and according to a UPS main frame busbar voltage, the 2nd UPS main frame busbar voltage, the first main switch and first auxiliary switch of the one UPS battery tension and the 2nd UPS storage battery pressure-controlled the first commutation circuit, the operating state of the 3rd main switch of the second main switch of the second commutation circuit and the second auxiliary switch and the 3rd commutation circuit, concrete steps are as follows:

4. the control method of uninterrupted power supply battery sharing system according to claim 3, is characterized in that,

In described step S110, a UPS storage battery is connected to the shared UPS main frame that switches to from the 2nd UPS main frame and use, specific implementation step is:

5. the control method of uninterrupted power supply battery sharing system according to claim 3, is characterized in that:

6. the control method of a uninterrupted power supply battery sharing system as claimed in claim 1, it is characterized in that, described control module monitoring the one UPS main frame and the 2nd UPS main frame running status, be used for judging that whether a UPS battery discharging loop and the 2nd UPS battery discharging loop be normal, and according to a UPS main frame busbar voltage, the 2nd UPS main frame busbar voltage, the first main switch and first auxiliary switch of the one UPS battery tension and the 2nd UPS storage battery pressure-controlled the first commutation circuit, the 3rd main switch of the second main switch of the second commutation circuit and the second auxiliary switch and the 3rd commutation circuit and the operating state of the 3rd auxiliary switch, concrete steps are as follows:

7. the control method of uninterrupted power supply battery sharing system according to claim 6, is characterized in that,

In described step S28, a UPS storage battery is switched to the 2nd UPS main frame and used, specific implementation step is:

8. the control method of uninterrupted power supply battery sharing system according to claim 6, is characterized in that,

9. the control method of uninterrupted power supply battery sharing system according to claim 6, is characterized in that,

In described step S210, a UPS storage battery is connected to the shared UPS main frame that switches to from the 2nd UPS main frame and use, specific implementation step is:

10. the control method of uninterrupted power supply battery sharing system according to claim 3, is characterized in that,