CN106329703B - Rapid switching control method and control device of centralized bypass type parallel UPS - Google Patents
Rapid switching control method and control device of centralized bypass type parallel UPS Download PDFInfo
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- CN106329703B CN106329703B CN201610707048.5A CN201610707048A CN106329703B CN 106329703 B CN106329703 B CN 106329703B CN 201610707048 A CN201610707048 A CN 201610707048A CN 106329703 B CN106329703 B CN 106329703B
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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
本发明涉及集中旁路型并联UPS的快速切换控制方法和控制装置，对每个UPS模块的电压进行检测，每个UPS模块中的检测点至少有两个，分别为对应UPS模块中的交直流输入端或者输出端，和中间连接线路；当至少有一个检测点处的电压信号为异常信号时，那么，该UPS模块异常；当全部的UPS模块异常时，切换至旁路输出。该控制方式能够准确、快速判断切换动作时机，极大地降低了判断时间，避免出现数毫秒的UPS输出与旁路输出的短路，避免UPS装置损坏及旁路输入开关跳闸等现象。
The invention relates to a fast switching control method and a control device of a centralized bypass type parallel UPS. The voltage of each UPS module is detected, and each UPS module has at least two detection points, which are AC and DC corresponding to the UPS module respectively. Input terminal or output terminal, and the intermediate connection line; when the voltage signal at at least one detection point is abnormal signal, then the UPS module is abnormal; when all UPS modules are abnormal, switch to bypass output. This control method can accurately and quickly judge the switching action timing, greatly reducing the judgment time, avoiding the short circuit between the UPS output and the bypass output for several milliseconds, avoiding the damage of the UPS device and the tripping of the bypass input switch.
Description
Technical field
The present invention relates to the quick switching-over controls and control device of concentrating bypass type parallel UPS.
Background technique
As shown in Figure 1, it is our concentration bypass type parallel UPS systems used in everyday.The core component of the ups system
For two parts, UPS power pack and switching device.Wherein, UPS power pack has two-way power output selective, is logical all the way
UPS device output AC energy is crossed, another way is by-pass line, and the by-pass line is for directly exporting AC energy.By-pass line
Road is used to export electric energy as backup power source when UPS device normally can not 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 modules, all UPS
Module shares two-way input, respectively exchange input and direct current input, for any one UPS module, UPS module tool
There are two input terminals, are ac input end and direct-flow input end respectively, the output end of alternating current can be exported with one.It is all
The output end of UPS module is all connected with an outlet line, and the outlet line connection switching apparatus, by-pass line is directly connected to this and cuts
Which changing device, switching device select export according to logic judgment or according to actual needs.Therefore, pass through switching device
Switching to can be realized the ups system be to export alternating current by UPS device, or by by-pass line export alternating current, to be negative
Carry power supply.
Since UPS includes two input terminals: ac input end and direct-flow input end and one are for exporting alternating current
Output end, then, the internal wiring of the UPS module is on the whole as shown in Fig. 2, alternating current and direct current pass through respective place respectively
Intermediate connections road is connected to after reason, the interconnecting line is by exporting alternating current after corresponding processing circuit.It closes
It is to carry out according to actual needs in the specific setting of process circuit, such as the setting of rectification, inversion either step-up/step-down circuit
, it just no longer illustrates here.
Currently, being generally used the method for detection UPS output voltage in concentrating bypass type parallel UPS system to judge
Whether system needs to carry out the switching of UPS output with bypass output.But since parallel UPS system output voltage is by multiple modules
It is formed in parallel jointly, different UPS modules is in operation since the influence of internal circuit can will lead to system in different situations
The voltage waveform when electric voltage exception of lower UPS device output or power down is different, it is difficult to accurately, quickly judge switching action opportunity,
The switching time for causing UPS output to turn bypass output is unsatisfactory for national standard.Under the premise of judging herein, even if modification switching device
Action logic and timing, although can satisfy switching time requirement, can inevitably result in several milliseconds UPS output
Short circuit with bypass output causes so that system bypass input current great dash current occurs when switching action carries out
Phenomena such as damage of UPS device and bypass input switch trip.
Summary of the invention
The object of the present invention is to provide a kind of quick switching-over controls for concentrating bypass type parallel UPS, pass to solve
The switching mode of system is unable to satisfy the problem of switching time requirement.Present invention simultaneously provides a kind of concentration bypass type parallel UPSs
Rapid switching control device.
To achieve the above object, the solution of the present invention includes a kind of bypass type parallel UPS being concentrated to be switched fast controlling party
Method detects the voltage of each UPS module, at least two voltage detecting points is provided in each UPS module, one right
Alternating current-direct current input terminal or the output end in UPS module are answered, another is on the intermediate connections road in corresponding UPS module；When
When voltage signal at least one test point is abnormal signal, corresponding UPS module is abnormal；When whole UPS modules are abnormal
When, control switching device switches to bypass output；
Wherein, when one of voltage detecting point is located at alternating current-direct current input terminal, which is used for while detecting
The voltage signal of ac input end and direct-flow input end, when the voltage signal of ac input end and direct-flow input end is abnormal simultaneously
When signal, the voltage signal at the alternating current-direct current input terminal test point is abnormal signal.
There are three voltage detecting point, first alternating current-direct current being arranged in corresponding UPS module is defeated for setting in each UPS module
Enter end, second output end being arranged in corresponding UPS module, the intermediate connections in corresponding UPS module are arranged in third
On the road.
A kind of rapid switching control device for concentrating bypass type parallel UPS,
Including logic judgment unit, the logic judgment unit has n group signal input part, and every group of signal input part is corresponding
One UPS module has at least two signal input parts in every group of signal input part, and each signal input part has been correspondingly connected with voltage inspection
Survey module, the voltage of the first voltage test point and second voltage test point that are respectively used to detect in corresponding UPS module, described the
Alternating current-direct current input terminal or output end in corresponding UPS module is arranged in one voltage detecting point, and the second voltage test point is set
It sets on the intermediate connections road in corresponding UPS module；If the setting of first voltage test point is in alternating current-direct current input terminal, corresponding
Voltage detection module includes two voltage detection devices, is respectively used to the voltage of detection ac input end and 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；Logic judgment unit carries out logic judgment, criterion according to the voltage signal that all voltage detection modules detect are as follows: for
Any one UPS module, it is corresponding when the voltage signal that corresponding all voltage detection modules detect is normal signal
UPS module it is normal；When at least one UPS module is normal, logic judgment unit output voltage normal logic signal, when all
UPS module it is abnormal when, logic judgment unit output voltage abnormal logic signal；
It further include control signal output unit, it is defeated that the output signal of the logic judgment unit inputs to the control signal
Unit out, the control signal output unit are used for: when logic judgment unit output voltage normal logic signal, 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 to switch
Device switches to the control signal of by-pass line.
There are three signal input part in every group of signal input part, it is correspondingly connected with there are three voltage detection module, first
Voltage detection module is used to detect the voltage of the alternating current-direct current input terminal in corresponding UPS module, and second voltage detection module is for examining
The voltage of the intermediate connections road in corresponding UPS module is surveyed, tertiary voltage detection module is for detecting in corresponding UPS module
The voltage of output end.
When the voltage signal of the alternating current-direct current input terminal in the correspondence UPS module of first voltage detection module detection is normal letter
Number when, export high level signal；When the electricity of the intermediate connections road in the correspondence UPS module of second voltage detection module detection
When pressure signal is normal signal, high level signal is exported；Output in the correspondence UPS module of tertiary voltage detection module detection
When the voltage signal at end is normal signal, high level signal is exported；Logic judgment unit output voltage normal logic signal be
High level signal.
The logic judgment unit includes n logic judgment module, the corresponding one group of signal input of each logic judgment module
End, when corresponding three voltage detection modules of logic judgment module export high level signal, logic judgment module output
High level signal；The output end of n logic judgment module be all connected to one or input terminal, described or door output end is
The output end of the logic judgment unit.
The logic judgment unit further include with the one-to-one optocoupler of logic judgment module, the logic judgment module
Output end passes through described in corresponding optocoupler connection or the input terminal of door.
The control signal output unit includes that input signal gives module, drives given module and logic judgment and output
Module, the input signal give module and drive given module output connection logic judgment and output module；
The driving signal for driving given module to be used for the switching of output driving switching device；
There are two control signal outputs for the logic judgment and output module tool, and first control signal output end is for defeated
Switching device of sening as an envoy to switches to the control signal of UPS device, and second control signal output end switches switching device for exporting
To the control signal of by-pass line.
Switching device is controllable silicon drive circuit, including two silicon-controlled, and first is silicon-controlled for switching to UPS device,
Make UPS device by the first silicon-controlled output electric energy, second is silicon-controlled for switching to by-pass line, makes by-pass line by the
Two silicon-controlled output electric energy；The first control signal output end is silicon-controlled for controlling connection first, the second control letter
Number output end is silicon-controlled for controlling connection second；
It includes switch transistor T 6 that the input signal, which gives module, and the anode of switch transistor T 6 is connected to power supply, the control
The control electrode of the input terminal connection switch pipe T6 of signal output unit；
The logic judgment and output module include optocoupler OP1 and optocoupler OP2, and the power supply passes through optocoupler OP1's
Primary side connects the input terminal of the control signal output unit, and the cathode of switch transistor T 6 is grounded by the primary side of optocoupler OP2；It is given
Power supply VCC pass through respectively optocoupler OP1 it is secondary while and optocoupler OP2 it is secondary while be grounded, the ungrounded end on the secondary side of optocoupler OP1 passes through non-
An input terminal of door U2B connection NAND gate U3C, another for driving the given module output connection NAND gate U3C
Input terminal, the output end of NAND gate U3C are the second control signal output end；The ungrounded end on the secondary side of optocoupler OP2 passes through
The ungrounded end of an input terminal of NOT gate U2A connection NAND gate U3A, the secondary side of the optocoupler OP1 connects the NAND gate U3A
Another input terminal, the output end of the NAND gate U3A passes through an input terminal of NOT gate U2D connection NAND gate U3B, described
Given module output is driven to connect another input terminal of the NAND gate U3B, the output end of NAND gate U3B is first control
Signal output end processed.
It is described to drive the square wave driving signal that given module output frequency is 1.2kHz.
In the quick switching-over control and device provided by the invention for concentrating bypass type parallel UPS, each UPS module
In be provided at least two voltage detecting points, one of them is in alternating current-direct current input terminal or output end, another is in middle line
On, two voltage detecting points are at least set, and are distributed in the different zones of UPS module, can accurately determine the operation of UPS module
Situation, so, this detection mode can more accurately obtain the operating condition of corresponding UPS module, only when all electricity
When pressing the voltage at test point normal, which is only normally.Also, logic judgment unit is according to all UPS moulds
The voltage condition of block carries out logic judgment, when all UPS module exceptions, logic judgment unit output abnormality control letter
Number, control signal output unit output control signal switches to the switching device of ups system power supply mode by UPS device
Bypass output.So this control mode by detecting the voltage signals of the different zones of each UPS module, can be avoided and be
System in varied situations the output voltage exception or power down of UPS device when the different situation of voltage waveform.And when all
When judging that UPS module is abnormal, which just controls switching device and switches over, so, the control device can it is accurate,
Quickly judge switching action opportunity, significantly reduce and judge the time, avoids the occurrence of several milliseconds of UPS output and bypass output
Short circuit, the switching time for making UPS output turn bypass output meets national standard, and system bypass input current is being switched
Phenomena such as movement is not in great dash current when carrying out, and avoids the damage of UPS device and bypass input switch trip.
Detailed description of the invention
Fig. 1 is ups system structural schematic diagram；
Fig. 2 is UPS module overall structure diagram；
Fig. 3 is the rapid switching control device overall structure diagram for concentrating bypass type parallel UPS；
Fig. 4 is the structural schematic diagram of UPS module one of which detailed construction；
Fig. 5 is the electrical block diagram of logic judgment module；
Fig. 6 is the structural schematic diagram of optocoupler OP26；
Fig. 7 is the composition division schematic diagram for controlling signal output unit；
Fig. 8 is the electrical block diagram for controlling signal output unit；
Fig. 9 is the circuit theory schematic diagram of switching device.
Specific embodiment
The present invention will be further described in detail with reference to the accompanying drawing.
The rapid switching control device provided by the invention for concentrating bypass type parallel UPS is suitable for UPS system shown in FIG. 1
System, since the system belongs to routine techniques, and has had been described in detail in background technology part, just no longer specific here
Description.
As shown in figure 3, the rapid switching control device includes logic judgment unit, which believes with n group
Number input terminal, every group of signal input part are corresponding with a UPS module in ups system, that is to say, that have in ups system
The number of UPS module is identical as the group number for the signal input part that logic judgment unit has, and every group of signal input part is for inputting
Data information in corresponding UPS module.
Every group of signal input part includes three signal input parts, these three signal input parts are correspondingly connected with that there are three voltages to examine
Module is surveyed, so, there is 3n voltage detection module in the control device, as shown in figure 3, the corresponding electricity of first group of signal input part
Press detection module be A1, B1 and C1, the corresponding voltage detection module of second group of signal input part be A2, B2 and C2 ... ..., n-th
The corresponding voltage detection module of group signal input part is An, Bn and Cn.In addition, voltage detection module is existing voltage detector
Part, for detecting DC voltage or alternating voltage.
Since each group of voltage detection module is all the same, below for first group.First group of voltage detection module is used for
Detect the information of voltage in first UPS module in ups system.Wherein, voltage detection module A1 is for detecting in UPS module
Alternating current-direct current input terminal voltage signal, voltage detection module B2 is used to detect the electricity of intermediate connections road in UPS module
Signal is pressed, voltage detection module C1 is used to detect the voltage signal of the output end in UPS module.Due to the specific electricity of UPS module
There are many roads, so, interconnecting line therein also can be different, such as: as shown in figure 4, providing a kind of tool of UPS module
Body composition, interconnecting line is DC bus, correspondingly, by rectifying the setting with inversion, can also make intermediate connections
Road is ac bus.Since the present embodiment by taking Fig. 4 as an example, 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.
In addition, due to the alternating current-direct current input terminal in UPS module be two input terminals, voltage detection module A1 come detect this two
The voltage signal of a input terminal, then, voltage detection module A1 includes two voltage detection devices, detects the two inputs respectively
The voltage signal at end.As long as there is the voltage signal of an input terminal to be normal signal in ac input end and direct-flow input end,
The voltage signal of voltage detection module A1 detection is just normal signal, correspondingly, when the voltage signal of the two input terminals is
When abnormal signal, the voltage signal of voltage detection module A1 detection is just abnormal signal.Voltage detection module A2 ..., An with
A1 is identical.
The information of voltage that all voltage detection modules will test carries out logic judgment, is equivalent to, voltage detecting mould
It is provided with voltage comparator in block, according to the virtual voltage detected compared with a reference value that voltage comparator is set, comes defeated
Corresponding level signal out.In the present embodiment, a voltage normal range (NR) is set, if the actual voltage value detected is at this
When in range, corresponding voltage detection module exports high level, i.e. the voltage normal signal of voltage detection module output is high electricity
Ordinary mail number；Correspondingly, if the actual voltage value detected not in the range when, 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 voltage detection modules are designing
When, it is that set normal signal to high level effective, sets low level signal for abnormal signal.
For voltage detection module A1, since it detects two voltage signals, so, at least one voltage signal is worked as in setting
When for normal signal, voltage detection module A1 exports high level, only when two voltage signals are abnormal signal, voltage inspection
It surveys modules A 1 and exports low level.
All voltage detection modules export corresponding level signal according to corresponding voltage signal.Logic judgment unit root
The level signal exported according to all voltage detection modules carries out logic judgment: for any one UPS module, when corresponding institute
The voltage signal that detects of voltage detection module when being 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 UPS modules are 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, the logic judgment unit include n logic judgment module and one or, each logic judgment module
Corresponding one group of signal input part, that is, correspond to a UPS module, that is to say, that it, should for any one logic judgment module
The input terminal of module is the output end of three voltage detection modules of corresponding UPS module, when these three voltage detection modules are defeated
Out when high level signal, logic judgment module exports high level.The output end of all logic judgment modules connects above-mentioned or door
Input terminal, should or door output end be the logic judgment unit output end.That is, each logic judgment module is patrolled
Volume relationship be with relationship.Therefore, logic judgment module can be logical AND gate circuit, be also possible to realize the tool of identical function
Body circuit, Fig. 5 give a kind of specific circuit, wherein X1, X2 and X3 are three input signals, and X4 is output signal.Switch
Pipe Q7 is connected when control terminal is high level, and switching tube Q10 is connected when control terminal is low level.By to the correlation in Fig. 5
The setting of the resistance value of resistance can make: when X1 high level signal, the voltage of the non-inverting input terminal of comparator U4A is less than anti-
The voltage of phase input terminal, and then comparator U4A is made to export low level signal, it is high level in X2 and X3 that switching tube Q7, which is disconnected,
Under conditions of signal, the control terminal of switching tube Q10 is high level, and switching tube Q10 is disconnected, and X4 is high level signal.As X1, X2 and
When having at least one in X3 for low level signal, such as: when X1 is low level signal, the non-inverting input terminal of comparator U4A
Voltage is greater than the voltage of inverting input terminal, and then comparator U4A is made to export high level, switching tube Q7 conducting, regardless of X2 and X3 is
No is low level signal, is pulled low the control terminal of switching tube Q10 for low level, switching tube Q10 conducting, X4 is that low level is believed
Number；For another example: when X1 is high level signal, the voltage of the non-inverting input terminal of comparator U4A is less than the voltage of inverting input terminal,
And then comparator U4A is made to export low level, switching tube Q7 is disconnected, and when having at least one in X2 and X3 is low level signal, is opened
The control terminal for closing pipe Q10 is pulled low as low level, and switching tube Q10 conducting, X4 is low level signal.
Control device further includes control signal output unit, and the output signal of logic judgment unit inputs to the control signal
Output unit, when logic judgment unit output voltage normal logic signal, control signal output unit output control signal makes
Switching device switches to UPS device, i.e., when at least one UPS module is normal, ups system is normal power supply, is filled by switching
The movement set makes the line conduction between UPS module and load, disconnects the route between by-pass line and load, passes through UPS
Module powers to the load；When logic judgment unit output voltage abnormal logic signal, control signal output unit output control
Signal, so that switching device is switched to by-pass line, by the movement of switching device, makes side when that is, all UPS modules are abnormal
Line conduction between route road and load disconnects the route between UPS module and load, supplies that ups system by UPS module
Cutting shifts to by-pass line power supply, realizes the seamless interfacing of ups system, the uninterrupted power supply of proof load.
In addition, since switching device and UPS apparatus control portion point are by respective accessory power supply offer power supply, so that each UPS
Control circuit between module and switching device is non-" altogether " system.It needs to be isolated using optocoupler.Each logic judgment mould
Block is configured with an optocoupler OP26, and the signal of optocoupler processing is level signal, but since its output is used for switching control
With being required to speed, be high speed photo coupling H11L1 used in this circuit.As shown in fig. 6, optocoupler output is that OC is exported,
Therefore need to connect pull-up resistor in the 4th foot, guarantee that optocoupler output signal level is accurate with this.X4 signal is logic judgment module output
Signal, X5 signal is the signal exported by optocoupler OP26.The output end of all optocoupler OP26 connects above-mentioned or door defeated
Enter end, is somebody's turn to do or the output end of door is the output end X6 of logic judgment unit.According to the output characteristics of optocoupler it is found that when X4 is low
When level signal, optocoupler primary side conducting, secondary side output is low level, i.e. X5 is low level；Correspondingly, when X4 is high level signal
When, X5 is high level.
In the present embodiment, control signal output unit includes input signal given circuit, driving given circuit and logic
Judgement and output circuit, input signal given circuit and driving given circuit output connection logic judgment and output circuit, such as Fig. 7
Shown, I region is input signal given circuit, and II region is driving given circuit, and III region is logic judgment and output circuit.
Circuit structure in Fig. 7 and Fig. 8 is identical, wherein Fig. 7 has further carried out region division to the circuit structure.
Given circuit is driven to be used for the driving signal of output driving switching device switching.In the present embodiment, switching device
For controllable silicon drive circuit, including two silicon-controlled, as shown in figure 9, first is silicon-controlled for ups system to be switched to UPS dress
Power supply is set, keeps UPS device silicon-controlled for ups system to be switched to by-pass line power supply by silicon-controlled output electric energy, second,
By-pass line is set to pass through silicon-controlled output electric energy.Also, the two are silicon-controlled only in the drive of the square wave driving signal of 1.2kHz
It could be connected under dynamic.But controllable silicon drive circuit is various informative, and the specific structure of switching device is also not of the invention
Emphasis, so no longer illustrating herein.
As shown in figure 8, driving given circuit includes U1 chip, U1 chip is power management chip UC3845, by the chip
It is set as open loop mode of operation by E2, C1, R1, C2, makes the square wave driving signal of its 6 foot output frequency 1.2kHz always.
Input signal given circuit includes switch transistor T 6, and the anode of switch transistor T 6 is connected to power supply+5V, and control signal is defeated
The control electrode of input terminal (being the output end X6 of logic judgment unit) the connection switch pipe T6 of unit out.
Logic judgment and output circuit include that optocoupler OP1 and optocoupler OP2, power supply+5V are connected by the primary side of optocoupler OP1
It connects at X6, the cathode of switch transistor T 6 is grounded by optocoupler OP2；Given power supply VCC passes through secondary side and the optocoupler of optocoupler OP1 respectively
The secondary side of OP2 is grounded, and the ungrounded end on the secondary side of optocoupler OP1 passes through an input terminal of NOT gate U2B connection NAND gate U3C, U1
Another input terminal of the 6 feet output connection NAND gate U3C of chip, the output end of NAND gate U3C is second control signal output
End exports X8 signal；The ungrounded end on the secondary side of optocoupler OP2 passes through an input terminal of NOT gate U2A connection NAND gate U3A, light
Another input terminal of the ungrounded end connection NAND gate U3A on the secondary side of coupling OP1, the output end of NAND gate U3A pass through NOT gate U2D
Connect an input terminal of NAND gate U3B, another input terminal of the 6 feet output connection NAND gate U3B of U1 chip, NAND gate
The output end of U3B is first control signal output end, exports X7 signal.
In two control signal outputs in logic judgment and output circuit, first control signal output end is for controlling
Connect first silicon-controlled, second control signal output end is silicon-controlled for controlling connection second.
When UPS device is working properly, X6 signal is high level, and optocoupler OP1 primary side is not turned on, so that the input of U2B is
High level state, the output of U2B are low level state, and another input terminal input of U3C is square-wave signal, then, U3C is defeated
Being out high level signal, is not square-wave signal, i.e. X8 is high level signal, so, it is unable to control the second controlled silicon conducting.And
And T6 is connected, the conducting of optocoupler OP2 primary side, so that the input of U2A is low level state, the output of U2A is high level state, U3A
Two input pins be high level, output be low level so that the output of U2D be high level, high level and square-wave signal
By exporting square-wave signal after NAND gate, i.e. X7 signal is the square-wave signal that frequency is 1.2kHz, the first controlled silicon conducting, control
Switching device processed switches to UPS device.
Therefore, when UPS is worked normally, X6 signal is high level, and X7 signal is the square wave of 1.2kHz, and X8 signal is high point
Flat, i.e. control switches to the silicon-controlled open-minded of UPS device, and control switches to the silicon-controlled shutdown of bypass, and system is supplied by UPS device
Electricity.
When UPS device operation irregularity, X6 signal is low level, optocoupler OP1 primary side conducting, so that the input of U2B is low
Level state, the output of U2B are high level state, and another input terminal input of U3C is square-wave signal, then, U3C output
For square-wave signal, i.e. X8 is the square-wave signal of 1.2kHz, so, the second controlled silicon conducting, switching device switches to by-pass line.
At this point, T6 is not turned on, optocoupler OP2 primary side is not turned on, so that the input of U2A is high level state, the output of U2A is low level shape
State, U3A output are high level, so that the output of U2D is low level, low level and square-wave signal by exporting height after NAND gate
Level signal, i.e. X7 signal are high level signal, are unable to control the first controlled silicon conducting.
Therefore, when UPS exception, X6 signal is low level, and X7 signal is flat for high point, and X8 signal is the square wave of 1.2kHz,
The silicon-controlled shutdown for switching to UPS device is controlled, control switches to the controlled silicon conducting of bypass, system bypass power supply.
In above-described embodiment, when the voltage signal of the corresponding position of voltage detection module detection is normal signal, output
High level signal when abnormal, exports low level signal, and the logic judgment in the specific circuit in the present embodiment is also base
In aforesaid way.Certainly, this is a kind of embodiment, and voltage detection module is believed according to the level exported the case where voltage
It number defines and, then, as other embodiments, when the voltage signal of the corresponding position of voltage detection module detection
When for normal signal, low level signal can also be exported, when abnormal, high level signal can also be exported, then supporting the logic
The particular circuit configurations of mode also can correspondingly change.
In above-described embodiment, it is alternating current-direct current input terminal, medium line respectively that there are three voltage detecting points in each UPS module
Road and output end, this is a kind of embodiment of optimization, and as other embodiments, the number of voltage detecting point is can be with
Specifically it is arranged according to required precision, if required precision is higher, it is possible to more than three test point is set, such as
As shown in figure 4, can also be provided at full-bridge inverting, at booster circuit, high-frequency inversion etc. on the basis of original three
Voltage detecting point, logic criterion are identical as in above-described embodiment；In addition, the number of voltage detecting point, which needs to meet, must at least have
2 requirements, i.e., will at least be arranged two voltage detecting points in each UPS module, and one in alternating current-direct current input terminal or
Output end, another is on middle line.
Specific embodiment is presented above, but the present invention is not limited to described embodiment.Base of the invention
This thinking is above-mentioned basic scheme, so the invention is not limited to the specific electricity of each component part in the present embodiment
Road.The change, modification, replacement and modification carried out without departing from the principles and spirit of the present invention to embodiment are still fallen
Enter in protection scope of the present invention.
Claims (8)
1. a kind of rapid switching control device for concentrating bypass type parallel UPS, which is characterized in that
Including logic judgment unit, the logic judgment unit has n group signal input part, and every group of signal input part is one corresponding
UPS module has at least two signal input parts in every group of signal input part, and each signal input part has been correspondingly connected with voltage detecting mould
Block, the voltage of the first voltage test point and second voltage test point that are respectively used to detect in corresponding UPS module, first electricity
Alternating current-direct current input terminal or output end in corresponding UPS module is arranged in pressure test point, and the second voltage test point setting exists
Intermediate connections road in corresponding UPS module；If first voltage test point is arranged in alternating current-direct current input terminal, corresponding voltage
Detection module includes two voltage detection devices, is respectively used to the voltage of detection ac input end and direct-flow input end, works as exchange
When the voltage signal of input terminal and direct-flow input end is abnormal signal simultaneously, corresponding voltage detection module output abnormality signal；
Logic judgment unit carries out logic judgment, criterion according to the voltage signal that all voltage detection modules detect are as follows: for appointing
It anticipates a UPS module, it is corresponding when the voltage signal that corresponding all voltage detection modules detect is normal signal
UPS module is normal；When at least one UPS module is normal, logic judgment unit output voltage normal logic signal, when all
When UPS module is abnormal, logic judgment unit output voltage abnormal logic signal；
It further include control signal output unit, it is single that the output signal of the logic judgment unit inputs to the control signal output
Member, the control signal output unit are used for: when logic judgment unit output voltage normal logic signal, output fills switching
Set the control signal for 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.
2. the rapid switching control device according to claim 1 for concentrating bypass type parallel UPS, which is characterized in that
There are three signal input part in every group of signal input part, it is correspondingly connected with that there are three voltage detection module, first voltages
Detection module is used to detect the voltage of the alternating current-direct current input terminal in corresponding UPS module, and second voltage detection module is for detection pair
The voltage of the intermediate connections road in UPS module is answered, tertiary voltage detection module is used to detect the output in corresponding UPS module
The voltage at end.
3. the rapid switching control device according to claim 2 for concentrating bypass type parallel UPS, which is characterized in that
When the voltage signal of the alternating current-direct current input terminal in the correspondence UPS module of first voltage detection module detection is normal signal
When, export high level signal；When the voltage of the intermediate connections road in the correspondence UPS module of second voltage detection module detection
When signal is normal signal, high level signal is exported；Output end in the correspondence UPS module of tertiary voltage detection module detection
Voltage signal be normal signal when, export high level signal；The voltage normal logic signal of logic judgment unit output is height
Level signal.
4. the rapid switching control device according to claim 3 for concentrating bypass type parallel UPS, which is characterized in that
The logic judgment unit includes n logic judgment module, the corresponding one group of signal input part of each logic judgment module, when
When corresponding three voltage detection modules of logic judgment module export high level signal, which exports high level
Signal；The output end of n logic judgment module be all connected to one or input terminal, described or door output end be the logic
The output end of judging unit.
5. the rapid switching control device according to claim 4 for concentrating bypass type parallel UPS, which is characterized in that
The logic judgment unit further includes and the one-to-one optocoupler of logic judgment module, the output of the logic judgment module
End connects described or door input terminal by corresponding optocoupler.
6. the rapid switching control device according to claim 3 for concentrating bypass type parallel UPS, which is characterized in that
The control signal output unit includes that input signal gives module, drives given module and logic judgment and output mould
Block, the input signal give module and drive given module output connection logic judgment and output module；
The driving signal for driving given module to be used for the switching of output driving switching device；
There are two control signal output, first control signal output end makes for exporting for the logic judgment and output module tool
Switching device switches to the control signal of UPS device, and second control signal output end makes switching device switch to side for exporting
The control signal on route road.
7. the rapid switching control device according to claim 6 for concentrating bypass type parallel UPS, which is characterized in that
Switching device is controllable silicon drive circuit, including two silicon-controlled, and first is silicon-controlled for switching to UPS device, makes UPS
Device is silicon-controlled for switching to by-pass line by the first silicon-controlled output electric energy, second, makes by-pass line can by second
It controls silicon and exports electric energy；The first control signal output end is silicon-controlled for controlling connection first, and the second control signal is defeated
Outlet is silicon-controlled for controlling connection second；
It includes switch transistor T 6 that the input signal, which gives module, and the anode of switch transistor T 6 is connected to power supply, the control signal
The control electrode of the input terminal connection switch pipe T6 of output unit；
The logic judgment and output module include optocoupler OP1 and optocoupler OP2, and the power supply passes through the primary side of optocoupler OP1
The input terminal of the control signal output unit is connected, the cathode of switch transistor T 6 is grounded by the primary side of optocoupler OP2；Given power supply
VCC pass through respectively optocoupler OP1 it is secondary while and optocoupler OP2 it is secondary while be grounded, the ungrounded end on the secondary side of optocoupler OP1 passes through NOT gate
An input terminal of U2B connection NAND gate U3C, another of the driving given module output connection NAND gate U3C are defeated
Enter end, the output end of NAND gate U3C is the second control signal output end；The ungrounded end on the secondary side of optocoupler OP2 passes through non-
An input terminal of door U2A connection NAND gate U3A, the ungrounded end on the secondary side of the optocoupler OP1 connects the NAND gate U3A's
Another input terminal, the output end of the NAND gate U3A pass through an input terminal of NOT gate U2D connection NAND gate U3B, the drive
Dynamic given module output connects another input terminal of the NAND gate U3B, and the output end of NAND gate U3B is first control
Signal output end.
8. the rapid switching control device according to claim 7 for concentrating bypass type parallel UPS, which is characterized in that
It is described to drive the square wave driving signal that given module output frequency is 1.2kHz.
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| CN201610707048.5A CN106329703B (en) | 2016-08-23 | 2016-08-23 | Rapid switching control method and control device of centralized bypass type parallel UPS |
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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 |
| CN112018868B (en) * | 2020-07-31 | 2022-10-21 | 科华数据股份有限公司 | UPS bypass drive unit and UPS bypass drive system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201126981Y (en) * | 2007-11-30 | 2008-10-01 | 上海市电力公司 | UPS system for transformer substation of 220kV voltage class and above |
| CN101394097A (en) * | 2007-09-21 | 2009-03-25 | 台达电子工业股份有限公司 | Uninterruptible power supply system and control method thereof |
| CN103701192A (en) * | 2012-09-27 | 2014-04-02 | 力博特公司 | Modularized uninterruptible power supply (UPS) system and power supply method thereof |
| CN105356588A (en) * | 2015-11-04 | 2016-02-24 | 漳州科华技术有限责任公司 | Control method for switching UPS output mode |
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| JP4669860B2 (en) * | 2007-07-06 | 2011-04-13 | 三菱電機株式会社 | Uninterruptible power system |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101394097A (en) * | 2007-09-21 | 2009-03-25 | 台达电子工业股份有限公司 | Uninterruptible power supply system and control method thereof |
| CN201126981Y (en) * | 2007-11-30 | 2008-10-01 | 上海市电力公司 | UPS system for transformer substation of 220kV voltage class and above |
| CN103701192A (en) * | 2012-09-27 | 2014-04-02 | 力博特公司 | Modularized uninterruptible power supply (UPS) system and power supply method thereof |
| CN105356588A (en) * | 2015-11-04 | 2016-02-24 | 漳州科华技术有限责任公司 | Control method for switching UPS output mode |
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