CN106329703A - Quick switching control method and control device for concentrated bypass type parallel UPS - Google Patents
Quick switching control method and control device for concentrated bypass type parallel UPS Download PDFInfo
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- CN106329703A CN106329703A CN201610707048.5A CN201610707048A CN106329703A CN 106329703 A CN106329703 A CN 106329703A CN 201610707048 A CN201610707048 A CN 201610707048A CN 106329703 A CN106329703 A CN 106329703A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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Abstract
The invention relates to a quick switching control method and a control device for a concentrated bypass type parallel UPS, and aims to detect voltage of each UPS module; at least two detection points are set in each UPS module, and respectively correspond to an alternating and direct current input end or output end in the UPS module and a middle connection line; when a voltage signal of at least one of the detection points is an abnormal signal, the UPS module is abnormal; and when all the USP modules are abnormal, an output is switched to a bypass for outputting. The control mode can accurately and quickly judge the switching operation moment, so that the judgment duration is greatly shortened, the phenomenon that the UPS output and the bypass output have short circuit for milliseconds is avoided, and the phenomena of damage to a UPS device, tripping of a bypass input switch and the like are avoided.
Description
Technical field
The present invention relates to concentrate the quick switching-over control of bypass type parallel UPS and control device.
Background technology
As it is shown in figure 1, it is our concentration bypass type parallel UPS system used in everyday.The core component of this ups system
For two parts, UPS power pack and switching device.Wherein, UPS power pack has the output of two-way electric energy selective, and a road is logical
Crossing UPS device output AC electric energy, another road is by-pass line, and this by-pass line is used for direct output AC electric energy.By-pass line
Road for when UPS device cannot normally export electric energy as stand-by power supply to export electric energy.Bypass is concentrated to refer to by-pass line
It is directly connected to switching device, is two independent parts with UPS device.UPS device includes several UPS module, all of UPS
Module shares two-way input, is respectively exchange input and direct current inputs, and for any one UPS module, this UPS module has
Have two inputs, be ac input end and direct-flow input end respectively, have one can output AC electricity outfan.All
The outfan of UPS module is all connected with an outlet line, this outlet line connection switching apparatus, and by-pass line is directly connected to this and cuts
Changing device, switching device is according to logical judgment or which selects export according to actual needs.Therefore, switching device is passed through
Switching be capable of this ups system be by UPS device output AC electricity, or by by-pass line output AC electricity, to be negative
Carry power supply.
Owing to UPS includes two inputs: ac input end and direct-flow input end, and one for output AC electricity
Outfan, then, the internal wiring of this UPS module is on the whole as in figure 2 it is shown, alternating current and unidirectional current are respectively by respective place
Being connected to after reason on interconnecting line, this interconnecting line is by output AC electricity after corresponding process circuit.Close
In the concrete setting of process circuit, such as rectification, inversion or the setting of step-up/step-down circuit, be all to carry out according to actual needs
, the most no longer illustrate.
At present, in concentrating bypass type parallel UPS system, the method for detection UPS output voltage is the most all used to judge
System is the need of the switching carrying out UPS output and bypass output.But owing to parallel UPS system output voltage is by multiple modules
Jointly being formed in parallel, different UPS module is in operation owing to the impact of internal circuit can cause system in different situations
The electric voltage exception of lower UPS device output or voltage waveform during power down are different, it is difficult to accurately, quickly judge switching action opportunity,
The switching time causing UPS output to turn bypass output is unsatisfactory for Standard.Judge at this under premise, though amendment switching device
Action logic and sequential, although can meet requirement switching time, but the UPS output of several milliseconds can be inevitably resulted in
Short circuit with bypass output so that great dash current occurs when switching action is carried out in system bypass input current, and causes
The phenomenons such as the damage of UPS device and bypass input switch trip.
Summary of the invention
It is an object of the invention to provide a kind of quick switching-over control concentrating bypass type parallel UPS, in order to solve biography
The switching mode of system cannot meet the problem required switching time.Present invention simultaneously provides a kind of bypass type parallel UPS concentrated
Rapid switching control device.
For achieving the above object, the solution of the present invention include a kind of concentrate bypass type parallel UPS be switched fast controlling party
Method, detects the voltage of each UPS module, is provided with at least two voltage detecting point in each UPS module, and one right
Answer the alternating current-direct current input in UPS module or outfan, on another interconnecting line in corresponding UPS module；When
When at least the voltage signal at a test point is abnormal signal, corresponding UPS module is abnormal；When whole UPS module are abnormal
Time, control switching device and switch to bypass output；
Wherein, when one of them voltage detecting point is positioned at alternating current-direct current input, this voltage detecting point is for detecting simultaneously
Ac input end and the voltage signal of direct-flow input end, when the voltage signal of ac input end and direct-flow input end is abnormal simultaneously
During signal, the voltage signal at this alternating current-direct current input test point is abnormal signal.
Being provided with three voltage detecting points in each UPS module, first alternating current-direct current being arranged in corresponding UPS module is defeated
Enter end, second outfan being arranged in corresponding UPS module, the 3rd intermediate connections being arranged in corresponding UPS module
Lu Shang.
A kind of rapid switching control device concentrating bypass type parallel UPS,
Including logic judgment unit, described logic judgment unit has n group signal input part, and often group signal input part is corresponding
One UPS module, often has at least two signal input part in group signal input part, and each signal input part correspondence connects has voltage to examine
Survey module, be respectively used to detect the first voltage detecting point in corresponding UPS module and the voltage of the second voltage detecting point, described the
Voltage detecting point is arranged on the alternating current-direct current input in corresponding UPS module or outfan, and described second voltage detecting point sets
Put on the interconnecting line in corresponding UPS module；If the first voltage detecting point is arranged on alternating current-direct current input, then corresponding
Voltage detection module includes two voltage detection devices, is respectively used to detect ac input end and the voltage of direct-flow input end, when
When the voltage signal of ac input end and direct-flow input end is abnormal signal simultaneously, corresponding voltage detection module output abnormality letter
Number；The voltage signal that logic judgment unit detects according to all of voltage detection module carries out logical judgment, and criterion is: for
Any one UPS module is when the voltage signal that corresponding all of voltage detection module detects all is normal signal, corresponding
UPS module normal；When at least one UPS module is normal, logic judgment unit output voltage normal logic signal, when all
UPS module all abnormal time, logic judgment unit output voltage abnormal logic signal；
Also including control signal output unit, it is defeated that the output signal of described logic judgment unit inputs to described control signal
Going out unit, described control signal output unit is used for: when logic judgment unit output voltage normal logic signal, and output makes to cut
Changing device switches to the control signal of UPS device；When logic judgment unit output voltage abnormal logic signal, output makes switching
Device switches to the control signal of by-pass line.
Described often group signal input part there are three signal input parts, corresponding connection to have three voltage detection module, first
Voltage detection module is for detecting the voltage of the alternating current-direct current input in corresponding UPS module, and the second voltage detection module is used for examining
Surveying the voltage on the interconnecting line in corresponding UPS module, tertiary voltage detection module is for detecting in corresponding UPS module
The voltage of outfan.
When the voltage signal of the alternating current-direct current input in the corresponding UPS module of the first voltage detection module detection is normal letter
Number time, export high level signal；Electricity on the interconnecting line in the corresponding UPS module of the second voltage detection module detection
When pressure signal is normal signal, export high level signal；Output in the corresponding UPS module of tertiary voltage detection module detection
When the voltage signal of end is normal signal, export high level signal；The voltage normal logic signal of logic judgment unit output is
High level signal.
Described logic judgment unit includes n logic judgment module, the corresponding one group of signal input of each logic judgment module
End, when three voltage detection module that logic judgment module is corresponding all export high level signal, this logic judgment module exports
High level signal；The outfan of n logic judgment module be all connected to one or input, described or door outfan is
The outfan of this logic judgment unit.
Described logic judgment unit also includes and logic judgment module optocoupler one to one, described logic judgment module
Outfan all connects described or the input of door by corresponding optocoupler.
Described control signal output unit includes that input signal gives module, drives given module and logical judgment and output
Module, described input signal gives module and drives given module output to connect logical judgment and output module；
Described driving gives module for exporting the driving signal driving switching device switching；
Described logical judgment and output module have two control signal outfans, and the first control signal outfan is for defeated
Switching device of sening as an envoy to switches to the control signal of UPS device, and the second control signal outfan makes switching device switch for output
Control signal to by-pass line.
Switching device is controllable silicon drive circuit, and including two controllable silicons, the first controllable silicon is used for switching to UPS device,
Making UPS device by the first controllable silicon output electric energy, the second controllable silicon is used for switching to by-pass line, makes by-pass line pass through the
Two controllable silicon output electric energy；Described first control signal outfan is used for controlling to connect the first controllable silicon, and described second controls letter
Number outfan is used for controlling to connect the second controllable silicon；
Described input signal gives module and includes that switch transistor T 6, the anode of switch transistor T 6 are connected to power supply, described control
The control pole of the input connecting valve pipe T6 of signal output unit；
Described logical judgment and output module include optocoupler OP1 and optocoupler OP2, and described power supply is by optocoupler OP1's
Former limit connects the input of described control signal output unit, the negative electrode of the switch transistor T 6 former limit ground connection by optocoupler OP2；Given
Power supply VCC is respectively by secondary and the secondary ground connection of optocoupler OP2 of optocoupler OP1, and the ungrounded end of the secondary of optocoupler OP1 is by non-
Door U2B connects an input of NAND gate U3C, and described driving gives another of module output described NAND gate U3C of connection
Input, the outfan of NAND gate U3C is described second control signal outfan；The ungrounded end of the secondary of optocoupler OP2 passes through
Not gate U2A connects an input of NAND gate U3A, and the ungrounded end of the secondary of described optocoupler OP1 connects described NAND gate U3A
Another input, the outfan of described NAND gate U3A by not gate U2D connect NAND gate U3B an input, described
Driving given module output to connect another input of described NAND gate U3B, the outfan of NAND gate U3B is described first control
Signal output part processed.
Described driving gives the square wave driving signal that module output frequency is 1.2kHz.
In the quick switching-over control of the concentration bypass type parallel UPS that the present invention provides and device, each UPS module
In be provided with at least two voltage detecting point, one of them is at alternating current-direct current input or outfan, and another is at middle line
On, at least provided with two voltage detecting points, and it is distributed in the zones of different of UPS module, it is possible to accurately judge the operation of UPS module
Situation, so, this detection mode can more accurately obtain the ruuning situation of corresponding UPS module, only when all of electricity
When voltage at pressure test point is all normal, this UPS module is only normally.Further, logic judgment unit is according to all of UPS mould
The voltage condition of block carries out logical judgment, and when all of UPS module exception, logic judgment unit output abnormality controls letter
Number, control signal output unit output control signal, make the switching device of ups system power supply mode be switched to by UPS device
Bypass output.So, this control mode is by detecting the voltage signal of zones of different of each UPS module, it is possible to avoid be
The situation that voltage waveform when the output voltage exception of UPS device in varied situations of uniting or power down is different.And when all of
Judging when UPS module is all abnormal, this control device just controls switching device and switches over, so, this control device can accurately,
Quickly judge switching action opportunity, to significantly reduce the judgement time, it is to avoid occur what the UPS output of several milliseconds and bypass exported
Short circuit, meets Standard the switching time making UPS output turn bypass output, and makes system bypass input current in switching
Action does not haves great dash current when carrying out, it is to avoid the phenomenons such as the damage of UPS device and bypass input switch trip.
Accompanying drawing explanation
Fig. 1 is ups system structural representation；
Fig. 2 is UPS module overall structure schematic diagram；
Fig. 3 is the rapid switching control device overall structure schematic diagram concentrating bypass type parallel UPS；
Fig. 4 is the structural representation of UPS module one of which detailed construction；
Fig. 5 is the electrical block diagram of logic judgment module；
Fig. 6 is the structural representation of optocoupler OP26；
Fig. 7 is that the composition of control signal output unit divides schematic diagram；
Fig. 8 is the electrical block diagram of control signal output unit；
Fig. 9 is the circuit theory schematic diagram of switching device.
Detailed description of the invention
The present invention will be further described in detail below in conjunction with the accompanying drawings.
The rapid switching control device concentrating bypass type parallel UPS that the present invention provides is applicable to the UPS system shown in Fig. 1
System, owing to this system belongs to routine techniques, and has had been described in detail at background section, the most concrete
Describe.
As it is shown on figure 3, this rapid switching control device includes logic judgment unit, this logic judgment unit has n group letter
Number input, often group signal input part is corresponding with a UPS module in ups system, say, that have in ups system
The group number of the signal input part that the number of UPS module has with logic judgment unit is identical, and often group signal input part is used for inputting
Data message in corresponding UPS module.
Often group signal input part includes three signal input parts, and these three signal input part correspondence connects three voltage inspections
Survey module, so, this control device there is 3n voltage detection module, as it is shown on figure 3, the electricity that first group of signal input part is corresponding
Pressure detection module is A1, B1 and C1, and the voltage detection module that second group of signal input part is corresponding is A2, B2 and C2 ..., n-th
The voltage detection module that group signal input part is corresponding is An, Bn and Cn.It addition, voltage detection module is existing voltage detector
Part, is used for detecting DC voltage or alternating voltage.
Owing to each group of voltage detection module is the most identical, below as a example by first group.First group of voltage detection module is used for
The information of voltage in first UPS module in detection ups system.Wherein, voltage detection module A1 is used for detecting in UPS module
The voltage signal of alternating current-direct current input, voltage detection module B2 is for detecting the electricity on the interconnecting line in UPS module
Pressure signal, voltage detection module C1 is for detecting the voltage signal of the outfan in UPS module.Concrete electricity due to UPS module
Road has multiple, so, interconnecting line therein also can be different, such as: as shown in Figure 4, provides the tool of a kind of UPS module
Body forms, and interconnecting line is dc bus, correspondingly, by rectification and the setting of inversion, it is possible to so that intermediate connections
Road is ac bus.Since the present embodiment is as a example by Fig. 4, then, the test point of voltage detection module A1 is X2, voltage detecting mould
The test point of block B2 is X3, and the test point of voltage detection module C1 is X1.
Further, since the alternating current-direct current input in UPS module is two inputs, voltage detection module A1 detect this two
The voltage signal of individual input, then, voltage detection module A1 includes two voltage detection devices, the respectively input of detection the two
The voltage signal of end.As long as to have the voltage signal of an input in ac input end and direct-flow input end be normal signal,
The voltage signal of voltage detection module A1 detection is just for normal signal, correspondingly, when the voltage signal of the two input is
During abnormal signal, the voltage signal of voltage detection module A1 detection is just for abnormal signal.Voltage detection module A2 ..., An with
A1 is identical.
The information of voltage detected is carried out logical judgment by all of voltage detection module, is equivalent to, voltage detecting mould
Block is provided with voltage comparator, according to the comparison of the reference value that the virtual voltage detected sets with voltage comparator, comes defeated
Go out corresponding level signal.In the present embodiment, set voltage normal range, if be detected that actual voltage value at this
In the range of time, corresponding voltage detection module output high level, i.e. the voltage normal signal of voltage detection module output be high electric
Ordinary mail number；Correspondingly, if be detected that actual voltage value the most within the range time, corresponding voltage detection module exports low electricity
Flat, i.e. the electric voltage exception signal of voltage detection module output is low level signal.Therefore, all of voltage detection module is in design
Time, it is all normal signal to be set to high level effectively, abnormal signal is set to low level signal.
For voltage detection module A1, owing to it detects two voltage signals, so, set when at least one voltage signal
During for normal signal, voltage detection module A1 output high level, only when two voltage signals are abnormal signal, voltage is examined
Survey modules A 1 output low level.
All of voltage detection module exports corresponding level signal according to corresponding voltage signal.Logic judgment unit root
The level signal exported according to all of voltage detection module carries out logical judgment: for any one UPS module, when corresponding institute
When the voltage signal that some voltage detection module detect all is normal signal, corresponding UPS module is normal；When at least one
When UPS module is normal, logic judgment unit output voltage normal logic signal, when all of UPS module is all abnormal, logic is sentenced
Disconnected unit output voltage abnormal logic signal.In the present embodiment, the voltage normal logic signal of logic judgment unit output is
High level signal；The electric voltage exception logical signal of logic judgment unit output is low level signal.
Further, this logic judgment unit include n logic judgment module and one or, each logic judgment module
Corresponding one group of signal input part, namely a corresponding UPS module, say, that for any one logic judgment module, should
The input of module is the outfan of three voltage detection module of corresponding UPS module, when these three voltage detection module is the most defeated
When going out high level signal, logic judgment module output high level.The outfan of all of logic judgment module connects above-mentioned or door
Input, should or the outfan that outfan is this logic judgment unit of door.It is to say, the patrolling of each logic judgment module
Volume relation be with relation.Therefore, logic judgment module can be logical AND gate circuit, it is also possible to be the tool realizing identical function
Body circuit, Fig. 5 gives a kind of concrete circuit, and wherein, X1, X2 and X3 are three input signals, and X4 is output signal.Switch
Pipe Q7 conducting when controlling end and being high level, switching tube Q10 conducting when controlling end and being low level.By to being correlated with in Fig. 5
The setting of the resistance of resistance, it is possible to make: when X1 is high level signal, the voltage of the in-phase input end of comparator U4A is less than anti-
The voltage of phase input, and then make comparator U4A output low level signal, switching tube Q7 disconnects, and is high level at X2 and X3
Under conditions of signal, the control end of switching tube Q10 is high level, and switching tube Q10 disconnects, and X4 is high level signal.As X1, X2 and
When to have at least one in X3 be low level signal, such as: when X1 is low level signal, the in-phase input end of comparator U4A
Voltage is more than the voltage of inverting input, and then makes comparator U4A export high level, and switching tube Q7 turns on, and no matter X2 and X3 is
No is low level signal, all makes the control end of switching tube Q10 be pulled low as low level, and switching tube Q10 turns on, and X4 is low level letter
Number；For another example: when X1 is high level signal, the voltage of the in-phase input end of comparator U4A is less than the voltage of inverting input,
And then making comparator U4A output low level, switching tube Q7 disconnects, and when being low level signal when there being at least one in X2 and X3, opens
The control end closing pipe Q10 is pulled low as low level, and switching tube Q10 turns on, and X4 is low level signal.
Controlling device and also include control signal output unit, the output signal of logic judgment unit inputs to this control signal
Output unit, when logic judgment unit output voltage normal logic signal, control signal output unit output control signal, make
Switching device switches to UPS device, and i.e. when at least one UPS module is normal, ups system is normal power supply, is filled by switching
The action put, makes the line conduction between UPS module and load, makes the circuit between by-pass line and load disconnect, passes through UPS
Module powers to the load；When logic judgment unit output voltage abnormal logic signal, the output of control signal output unit controls
Signal, makes switching device switch to by-pass line, when the most all of UPS module is all abnormal, by the action of switching device, makes side
Line conduction between route road and load, makes the circuit between UPS module and load disconnect, makes ups system be supplied by UPS module
TURP shifts to by-pass line and powers, it is achieved the slitless connection of ups system, it is ensured that the uninterrupted power supply of load.
Further, since switching device and UPS apparatus control portion are divided is provided power supply by respective accessory power supply so that each UPS
Control circuit between module and switching device is non-" altogether " system.Need to use optocoupler to isolate.Each logical judgment mould
Block is all configured with an optocoupler OP26, and the signal that this optocoupler processes is level signal, but owing to its output is for switching control
With, speed is required, this circuit uses high speed photo coupling H11L1.As shown in Figure 6, this optocoupler is output as OC output,
Therefore need to connect pull-up resistor at the 4th foot, ensure that optocoupler output signal level is accurate with this.X4 signal is logic judgment module output
Signal, X5 signal be through optocoupler OP26 output signal.The outfan of all of optocoupler OP26 connects the defeated of above-mentioned or door
Enter end, should or the outfan of door be the outfan X6 of logic judgment unit.According to the output characteristics of optocoupler, when X4 is low
During level signal, the former limit of optocoupler turns on, and secondary is output as low level, i.e. X5 is low level；Correspondingly, it is high level signal as X4
Time, X5 is high level.
In the present embodiment, control signal output unit includes input signal given circuit, drives given circuit and logic
Judging and output circuit, input signal given circuit and driving given circuit output connect logical judgment and output circuit, such as Fig. 7
Shown in, I region is input signal given circuit, and II region is for driving given circuit, and III region is logical judgment and output circuit.
Circuit structure in Fig. 7 with Fig. 8 is identical, and wherein, Fig. 7 has carried out region division to this circuit structure further.
Drive given circuit for exporting the driving signal driving switching device switching.In the present embodiment, switching device
For controllable silicon drive circuit, including two controllable silicons, fill as it is shown in figure 9, the first controllable silicon is used for that ups system switches to UPS
Putting power supply, make UPS device export electric energy by controllable silicon, the second controllable silicon is powered for ups system is switched to by-pass line,
By-pass line is made to export electric energy by controllable silicon.Further, the two controllable silicon only driving at the square wave driving signal of 1.2kHz
Could turn under dynamic.But, controllable silicon drive circuit is various informative, and the concrete structure of switching device is not the present invention's
Emphasis, so no longer illustrating at this.
As shown in Figure 8, given circuit is driven to include that U1 chip, U1 chip are power management chip UC3845, by this chip
By E2, C1, R1, C2 are set to open loop mode of operation so that it is 6 feet output frequency always is the square wave driving signal of 1.2kHz.
Input signal given circuit includes that switch transistor T 6, the anode of switch transistor T 6 are connected to power supply+5V, and control signal is defeated
Go out the control pole of input (being i.e. the outfan X6 of logic judgment unit) the connecting valve pipe T6 of unit.
Logical judgment and output circuit include optocoupler OP1 and optocoupler OP2, and power supply+5V is by the former limit of optocoupler OP1 even
Connecing at X6, the negative electrode of switch transistor T 6 passes through optocoupler OP2 ground connection；Given power supply VCC is respectively by secondary and the optocoupler of optocoupler OP1
The secondary ground connection of OP2, the ungrounded end of the secondary of optocoupler OP1 connects an input of NAND gate U3C, U1 by not gate U2B
6 foot outputs of chip connect another input of NAND gate U3C, and the outfan of NAND gate U3C is the second control signal output
End, exports X8 signal；The ungrounded end of the secondary of optocoupler OP2 connects an input of NAND gate U3A, light by not gate U2A
The ungrounded end of the secondary of coupling OP1 connects another input of NAND gate U3A, and the outfan of NAND gate U3A passes through not gate U2D
Connecting an input of NAND gate U3B, 6 foot outputs of U1 chip connect another input of NAND gate U3B, NAND gate
The outfan of U3B is the first control signal outfan, exports X7 signal.
In two control signal outfans in logical judgment and output circuit, the first control signal outfan is used for controlling
Connecting the first controllable silicon, the second control signal outfan is used for controlling to connect the second controllable silicon.
When UPS device is working properly, X6 signal is high level, and the former limit of optocoupler OP1 is not turned on so that the input of U2B is
High level state, U2B is output as low level state, and another input input of U3C is square-wave signal, then, U3C is defeated
Go out for high level signal, be not square-wave signal, i.e. X8 be high level signal, so, it is impossible to control the second controlled silicon conducting.And
And, T6 turns on, and the former limit of optocoupler OP2 turns on so that the input of U2A is low level state, and U2A is output as high level state, U3A
Two input pins be high level, it is output as low level so that U2D is output as high level, high level and square-wave signal
After NAND gate export square-wave signal, i.e. X7 signal be frequency be the square-wave signal of 1.2kHz, the first controlled silicon conducting, control
Switching device processed switches to UPS device.
Therefore, when UPS normally works, X6 signal is high level, and X7 signal is the square wave of 1.2kHz, and X8 signal is high point
Flat, the controllable silicon i.e. controlling to switch to UPS device is open-minded, and the controllable silicon controlling to switch to bypass turns off, and system is supplied by UPS device
Electricity.
When UPS device operation irregularity, X6 signal is low level, and the former limit of optocoupler OP1 turns on so that the input of U2B is low
Level state, U2B is output as high level state, and another input input of U3C is square-wave signal, then, U3C exports
It is the square-wave signal of 1.2kHz for square-wave signal, i.e. X8, so, the second controlled silicon conducting, switching device switches to by-pass line.
Now, T6 is not turned on, and the former limit of optocoupler OP2 is not turned on so that the input of U2A is high level state, and U2A is output as low level shape
State, U3A is output as high level so that U2D is output as low level, and low level and square-wave signal export height after NAND gate
Level signal, i.e. X7 signal is high level signal, it is impossible to control the first controlled silicon conducting.
Therefore, when UPS exception, X6 signal is low level, and X7 signal is that high point is put down, and X8 signal is the square wave of 1.2kHz,
The controllable silicon i.e. controlling to switch to UPS device turns off, and controls to switch to the controlled silicon conducting of bypass, and system bypass is powered.
In above-described embodiment, when the voltage signal of the relevant position of voltage detection module detection is normal signal, output
High level signal, time abnormal, the logical judgment in output low level signal, and the concrete circuit in the present embodiment is also base
In aforesaid way.Certainly, this kind of embodiment, the level letter that voltage detection module exports according to the situation of voltage
Number define out, then, as other embodiment, when the voltage signal of the relevant position of voltage detection module detection
During for normal signal, it is also possible to output low level signal, time abnormal, it is also possible to output high level signal, then support this logic
The particular circuit configurations of mode also can correspondingly change.
In above-described embodiment, each UPS module has three voltage detecting points, is alternating current-direct current input, intermediate line respectively
Road and outfan, this is the embodiment of a kind of optimization, and as other embodiment, the number of voltage detecting point is permissible
Specifically arrange according to required precision, if required precision is higher, then, more than three test point can be set, such as
As shown in Figure 4, on the basis of original three, it is also possible to be provided with at full-bridge inverting, at booster circuit, high-frequency inversion etc.
Voltage detecting point, logic criterion is identical with above-described embodiment；At least must have it addition, the number of voltage detecting point needs to meet
The requirement of 2, in the most each UPS module will at least provided with two voltage detecting points, and one at alternating current-direct current input or
Outfan, another is on middle line.
It is presented above specific embodiment, but the present invention is not limited to described embodiment.The base of the present invention
This thinking is above-mentioned basic scheme, so the concrete electricity of each ingredient that the invention is not limited in the present embodiment
Road.The change that without departing from the principles and spirit of the present invention embodiment carried out, revise, replace and modification still falls
Enter in protection scope of the present invention.
Claims (10)
1. the quick switching-over control concentrating bypass type parallel UPS, it is characterised in that the voltage to each UPS module
Detecting, be provided with at least two voltage detecting point in each UPS module, an alternating current-direct current in corresponding UPS module is defeated
Enter end or outfan, on another interconnecting line in corresponding UPS module；Electricity at an at least test point
When pressure signal is abnormal signal, corresponding UPS module is abnormal；When whole UPS module exception, control switching device and switch to side
Road exports；
Wherein, when one of them voltage detecting point is positioned at alternating current-direct current input, this voltage detecting point detects exchange for simultaneously
Input and the voltage signal of direct-flow input end, when the voltage signal of ac input end and direct-flow input end is abnormal signal simultaneously
Time, the voltage signal at this alternating current-direct current input test point is abnormal signal.
The quick switching-over control of concentration bypass type parallel UPS the most according to claim 1, it is characterised in that
Each UPS module is provided with three voltage detecting points, the alternating current-direct current input that first is arranged in corresponding UPS module
End, second outfan being arranged in corresponding UPS module, the 3rd interconnecting line being arranged in corresponding UPS module
On.
3. the rapid switching control device concentrating bypass type parallel UPS, it is characterised in that
Including logic judgment unit, described logic judgment unit has n group signal input part, often corresponding one of group signal input part
UPS module, often has at least two signal input part in group signal input part, and each signal input part correspondence connects voltage detecting mould
Block, is respectively used to detect the first voltage detecting point in corresponding UPS module and the voltage of the second voltage detecting point, described first electricity
Pressure test point is arranged on the alternating current-direct current input in corresponding UPS module or outfan, and described second voltage detecting point is arranged on
On interconnecting line in corresponding UPS module；If the first voltage detecting point is arranged on alternating current-direct current input, then corresponding voltage
Detection module includes two voltage detection devices, is respectively used to detect ac input end and the voltage of direct-flow input end, works as exchange
When the voltage signal of input and direct-flow input end is abnormal signal simultaneously, corresponding voltage detection module output abnormality signal；
The voltage signal that logic judgment unit detects according to all of voltage detection module carries out logical judgment, and criterion is: for appointing
Anticipate a UPS module, when the voltage signal that corresponding all of voltage detection module detects all is normal signal, corresponding
UPS module is normal；When at least one UPS module is normal, logic judgment unit output voltage normal logic signal, when all of
When UPS module is all abnormal, logic judgment unit output voltage abnormal logic signal；
Also include that control signal output unit, the output signal of described logic judgment unit input to the output of described control signal single
Unit, described control signal output unit is used for: when logic judgment unit output voltage normal logic signal, and output makes switching fill
Put the control signal switching to UPS device；When logic judgment unit output voltage abnormal logic signal, output makes switching device
Switch to the control signal of by-pass line.
The rapid switching control device of concentration bypass type parallel UPS the most according to claim 3, it is characterised in that
Described often group signal input part there are three signal input parts, corresponding connection to have three voltage detection module, the first voltage
Detection module is for detecting the voltage of the alternating current-direct current input in corresponding UPS module, and it is right that the second voltage detection module is used for detecting
Answering the voltage on the interconnecting line in UPS module, tertiary voltage detection module is for detecting the output in corresponding UPS module
The voltage of end.
The rapid switching control device of concentration bypass type parallel UPS the most according to claim 4, it is characterised in that
When the voltage signal of the alternating current-direct current input in the corresponding UPS module of the first voltage detection module detection is normal signal
Time, export high level signal；Voltage on the interconnecting line in the corresponding UPS module of the second voltage detection module detection
When signal is normal signal, export high level signal；Outfan in the corresponding UPS module of tertiary voltage detection module detection
Voltage signal when being normal signal, export high level signal；The voltage normal logic signal of logic judgment unit output is high
Level signal.
The rapid switching control device of concentration bypass type parallel UPS the most according to claim 5, it is characterised in that
Described logic judgment unit includes n logic judgment module, the corresponding one group of signal input part of each logic judgment module, when
When three voltage detection module corresponding to logic judgment module all export high level signal, this logic judgment module output high level
Signal；The outfan of n logic judgment module be all connected to one or input, described or door outfan is this logic
The outfan of judging unit.
The rapid switching control device of concentration bypass type parallel UPS the most according to claim 6, it is characterised in that
Described logic judgment unit also includes and logic judgment module optocoupler one to one, the output of described logic judgment module
End all connects described or the input of door by corresponding optocoupler.
The rapid switching control device of concentration bypass type parallel UPS the most according to claim 5, it is characterised in that
Described control signal output unit includes that input signal gives module, drives given module and logical judgment and output mould
Block, described input signal gives module and drives given module output to connect logical judgment and output module；
Described driving gives module for exporting the driving signal driving switching device switching；
Described logical judgment and output module have two control signal outfans, and the first control signal outfan makes for output
Switching device switches to the control signal of UPS device, and the second control signal outfan makes switching device switch to side for output
The control signal on route road.
The rapid switching control device of concentration bypass type parallel UPS the most according to claim 8, it is characterised in that
Switching device is controllable silicon drive circuit, and including two controllable silicons, the first controllable silicon is used for switching to UPS device, makes UPS
Device is by the first controllable silicon output electric energy, and the second controllable silicon is used for switching to by-pass line, and making by-pass line pass through second can
Control silicon output electric energy；Described first control signal outfan is used for controlling to connect the first controllable silicon, and described second control signal is defeated
Go out end and connect the second controllable silicon for controlling；
Described input signal gives module and includes that switch transistor T 6, the anode of switch transistor T 6 are connected to power supply, described control signal
The control pole of the input connecting valve pipe T6 of output unit；
Described logical judgment and output module include optocoupler OP1 and optocoupler OP2, the described power supply former limit by optocoupler OP1
Connect the input of described control signal output unit, the negative electrode of the switch transistor T 6 former limit ground connection by optocoupler OP2；Given power supply
VCC is respectively by secondary and the secondary ground connection of optocoupler OP2 of optocoupler OP1, and the ungrounded end of the secondary of optocoupler OP1 passes through not gate
U2B connects an input of NAND gate U3C, described driving give module output connect described NAND gate U3C another is defeated
Entering end, the outfan of NAND gate U3C is described second control signal outfan；The ungrounded end of the secondary of optocoupler OP2 is by non-
Door U2A connects an input of NAND gate U3A, and the ungrounded end of the secondary of described optocoupler OP1 connects described NAND gate U3A
Another input, the outfan of described NAND gate U3A by not gate U2D connect NAND gate U3B an input, described in drive
Dynamic given module output connects another input of described NAND gate U3B, and the outfan of NAND gate U3B is described first control
Signal output part.
The rapid switching control device of concentration bypass type parallel UPS the most according to claim 9, it is characterised in that
Described driving gives the square wave driving signal that module output frequency is 1.2kHz.
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| CN110134167A (en) * | 2019-05-08 | 2019-08-16 | 北京安泰志诚科技发展有限公司 | Regulator and pressure regulation method |
| CN112018868A (en) * | 2020-07-31 | 2020-12-01 | 科华恒盛股份有限公司 | UPS bypass drive unit and UPS bypass drive system |
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| Publication number | Publication date |
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| CN106329703B (en) | 2019-01-22 |
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