CN204858728U - Two power supply automatic switching devices, dual power supply system - Google Patents
Two power supply automatic switching devices, dual power supply system Download PDFInfo
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- CN204858728U CN204858728U CN201520598376.7U CN201520598376U CN204858728U CN 204858728 U CN204858728 U CN 204858728U CN 201520598376 U CN201520598376 U CN 201520598376U CN 204858728 U CN204858728 U CN 204858728U
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Abstract
The utility model discloses a two power supply automatic switching devices belong to low pressure electrical technology field. Adopt semiconductor switch as the problem of two power change -over switch in order to satisfy sensitive load requirement and brought in order to solve prior art, the utility model discloses not pursueing the conversion rate who improves two power change -over switch, but using the fail safe nature of two power change -over switch in order to guarantee the system of mechanical type, introduce a simple supplementary power supply unit that controlled by the control unit simultaneously, the supplementary power supply unit of control carries out the normal operation of power supply in order to keep high sensitive load in short -term to the load in double power source switch's the conversion process, still is the load power supply by main power source or stand -by power supply after the conversion completion. The utility model also discloses a dual power supply system. The utility model discloses can satisfy the power demand like the sensitive load of metal halid lamp to fail safe nature is high, realizes with low costsly.
Description
Technical field
The utility model relates to a kind of dual-power automatic switching device, particularly relates to a kind ofly to meet the power demands of high sensitive loads and the dual-power automatic switching device of high reliability, belongs to low-voltage electrical technical field.
Background technology
All there are some power consumption equipments needing continued power in fields such as modern industry, medical treatment, business and daily lifes, in order to meet the continued power requirement of these power consumption equipments, usually take the power supply plan supplied power with double circuit, namely utilize dual-power automatic switching device to realize the automatic switchover of active and standby two-way power supply.Dual-power automatic switching device generally includes detecting unit, control unit and double power supply converting switch, detecting unit is used for detecting in real time the input voltage of main power source and stand-by power supply, and control unit controls double power supply converting switch according to the testing result of detecting unit thus realizes the automatic conversion of active and standby power supply.Existing dual-power automatic switching device is carrying out in Power convert process, the actuating logic of double power supply converting switch is break-before-make, namely first main power source is disconnected, then stand-by power supply is connected, so just there will be of short duration power-off (change-over time of traditional mechanical switch is generally several ms), this of short duration power-off is acceptable for most of load.But, also there are some high sensitive loads, very harsh for power supply sustainable requests.Such as, the metal halid lamp being mainly used in the illumination such as stadiums, tunnel is exactly a kind of typical sensitive loads.The maximum feature of metal halid lamp be when power is off between more than after 5ms, need could again light after about 10min.Obviously, if had a power failure suddenly in important sports tournament or in engineering construction, very large trouble can be caused.In order to the requirement making dual-power automatic switching device can meet high sensitive loads, a kind of existing solution adopts controllable semiconductor switch as double power supply converting switch, to improve the conversion speed of two-way power supply.Although the change-over time of two-way power supply can significantly reduce by this scheme, need to design cooling system separately to semiconductor switch, add the cost of system; In addition, semiconductor device works long hours, and its life and reliability is compared traditional mechanical type twin-power switch and all can be declined, thus have impact on the security reliability of whole electric power system.
Utility model content
Technical problem to be solved in the utility model is to overcome prior art deficiency, provide a kind of meet high sensitive loads power demands and there is dual-power automatic switching device and the switching control method thereof of high reliability.
The utility model specifically solves the problems of the technologies described above by the following technical solutions:
A kind of dual-power automatic switching device, comprising: main power source input, stand-by power supply input, power output end, duplicate supply switch unit; Described duplicate supply switch unit comprises detecting unit, control unit, mechanical double power supply converting switch, detecting unit is used for detecting in real time the input voltage of main power source input and stand-by power supply input, and control unit controls double power supply converting switch according to the testing result of detecting unit thus realizes the automatic conversion of active and standby power supply; Described duplicate supply switch unit also comprises an auxiliary power unit, and described auxiliary power unit comprises inversion unit, and the output of inversion unit is connected with described power output end, and the control end of inversion unit is connected with control unit; Control unit, in the transfer process of active and standby power supply, controls auxiliary power unit and exports electric energy.
In technique scheme, the electric energy of auxiliary power unit obtains from main power source and/or stand-by power supply, according to the difference obtaining electric energy mode, auxiliary power unit can be roughly divided into this two large class of direct-furnish type needing the accumulation energy type of energy storage component and do not need energy storage component, as follows respectively:
accumulation energy type:
Described auxiliary power unit also comprises energy storage component and rectification unit; Rectification unit is used for extracting electric energy supply energy storage component from main power source and/or stand-by power supply; Described energy storage component carries out energy storage at main power source and stand-by power supply powering phase by described rectification unit, in the transfer process of active and standby power supply, export electric energy by described inversion unit.
Preferably, described auxiliary power unit also comprises the change over switch be connected with rectification unit, two inputs of described change over switch and control end are connected with main power source input, stand-by power supply input, control unit respectively, described rectification unit is connected with rear class energy storage component, and the conversion logic of described change over switch is contrary with the switch logic of double power supply converting switch.
Preferably, the input of described rectification unit and the outlet side of described double power supply converting switch or main power source or stand-by power supply are connected.
Preferably, described rectification unit comprises the first rectification circuit and the second rectification circuit, the input of the first rectification circuit, the second rectification circuit connects main power source input, stand-by power supply input respectively, and the output of the first rectification circuit, the second rectification circuit is interconnected and is connected with rear class energy storage component afterwards.
Preferably, described auxiliary power unit also comprises regulator.Described regulator can be arranged at rectification unit before or transformer after inversion unit, also can be the DC/DC circuit be arranged between rectification unit and inversion unit.
Accumulation energy type auxiliary power unit also has a kind of special shape not needing rectification unit, specific as follows:
Described inversion unit is the two-way inverter that one end is connected with energy storage component, and the other end of two-way inverter is connected with described power output end.
Preferably, described two-way inverter is connected by two-way DC/DC circuit with energy storage component.
direct-furnish type:
Described auxiliary power unit also comprises rectification unit; Rectification unit is used for extracting electric energy from main power source or stand-by power supply, in the transfer process of active and standby power supply, export electric energy by described inversion unit.
Preferably, described auxiliary power unit also comprises the change over switch be connected with rectification unit, two inputs of described change over switch and control end are connected with main power source input, stand-by power supply input, control unit respectively, described rectification unit is connected with later stage inversion unit, and the conversion logic of described change over switch is contrary with the switch logic of double power supply converting switch.
Preferably, described rectification unit comprises the first rectification circuit and the second rectification circuit, the input of the first rectification circuit, the second rectification circuit connects main power source input, stand-by power supply input respectively, and the output of the first rectification circuit, the second rectification circuit is interconnected and is connected with later stage inversion unit afterwards.
Preferably, the input of described rectification unit is connected with main power source or stand-by power supply.
Preferably, described auxiliary power unit also comprises regulator.Described regulator can be arranged at rectification unit before or transformer after inversion unit, also can be the DC/DC circuit be arranged between rectification unit and inversion unit.
Described double power supply converting switch can be electromagnetic mechanical switch or motor-driven formula mechanical switch.
As above the switching control method of dual-power automatic switching device described in arbitrary technical scheme, comprises the following steps:
Step 1, the detecting unit input voltage to main power source input and/or stand-by power supply input detects in real time, and testing result is transferred to control unit;
Step 2, control unit carry out computing to input voltage, and judge that the voltage effective value of work at present power supply is whether within the scope of the voltage effective value preset, and in this way, then goes to step 1, as no, then goes to step 3;
Step 3, control unit control double power supply converting switch and carry out active and standby electrical source exchange, and control auxiliary power unit and start to export to load, in active and standby electrical source exchange process, carry out outputs power supply by auxiliary power unit to load;
Step 4, complete active and standby electrical source exchange when double power supply converting switch, control unit controls auxiliary power unit to be stopped exporting load, then goes to step 1.
A kind of dual power supply system can also be obtained according to identical utility model thinking, comprise main power source, stand-by power supply and as above dual-power automatic switching device described in arbitrary technical scheme, main power source input, the stand-by power supply input of dual-power automatic switching device are connected with main power source, stand-by power supply respectively.
Compared to existing technology, the utility model has following beneficial effect:
The utility model can make the load power down time minimum in main power supply transfer process, meets the safe power supply demand of the sensitive loads as metal halid lamp;
The utility model adopts mechanical double power supply converting switch, and security reliability is high, realizes cost low.
Accompanying drawing explanation
Fig. 1 is the structural principle schematic diagram of the first embodiment of the utility model dual power supply system;
Fig. 2 is the structural principle schematic diagram of the second embodiment of the utility model dual power supply system;
Fig. 3 is the structural principle schematic diagram of the third embodiment of the utility model dual power supply system;
Fig. 4 is the structural principle schematic diagram of the 4th kind of embodiment of the utility model dual power supply system;
Fig. 5 is the structural principle schematic diagram of the 5th kind of embodiment of the utility model dual power supply system;
Fig. 6 is the specific implementation circuit diagram of the utility model dual power supply system adopting three-phase four-wire system;
Fig. 7 is the workflow schematic diagram of the utility model dual power supply system.
Embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in detail:
Speak of as background technology part, in order to the requirement making dual-power automatic switching device can meet the high sensitive loads of metalloid Halogen lamp LED, existing solution adopts controllable semiconductor switch as double power supply converting switch, to improve the conversion speed of two-way power supply.Although the change-over time of two-way power supply can significantly reduce by this scheme, need to design cooling system separately to semiconductor switch, add the cost of system; In addition, semiconductor device works long hours, and its life and reliability is compared traditional mechanical type twin-power switch and all can be declined, thus have impact on the security reliability of whole electric power system.For solving the problem, the utility model does not pursue the conversion speed improving double power supply converting switch, but use mechanical double power supply converting switch to ensure the security reliability of system, introduce the auxiliary power unit of a simple controlled unit controls simultaneously, in the transfer process of duplicate supply conversion, control auxiliary power unit load carried out in short-term to (concrete power-on time was determined according to the change-over time of double power supply converting switch, be generally several ms) power with the normal operation maintaining high sensitive loads, be still load supplying by main power source or stand-by power supply after converting.
The utility model use mechanical double power supply converting switch can be the mechanical switch of existing electromagnetic mechanical switch, motor-driven formula mechanical switch or other type.Described electromagnetic mechanical switch comprises for driving double power supply converting switch contact system to carry out the switching mechanism of action, the electromagnet for driving switching mechanism to carry out duplicate supply conversion, and for controlling the controllable semiconductor switch of magnet switching; The control end of controllable semiconductor switch is connected with described control unit.Described motor-driven formula mechanical switch comprises switching mechanism, motor transmission system for driving switching mechanism to carry out duplicate supply conversion, and the control end of motor transmission system is connected with described control unit.
In technical solutions of the utility model, the electric energy of auxiliary power unit obtains from main power source and/or stand-by power supply, according to the difference obtaining electric energy mode, auxiliary power unit can be divided into this two large class of direct-furnish type needing the accumulation energy type of energy storage component and do not need energy storage component.For the ease of public understanding, with several specific embodiment, technical solutions of the utility model are described below.
Fig. 1 shows the structural principle of the first embodiment of the utility model dual power supply system.As shown in Figure 1, dual power supply system comprises power supply 1, power supply 2 and dual-power automatic switching device; Dual-power automatic switching device comprises: main power source input, stand-by power supply input, power output end, duplicate supply switch unit, wherein main power source input, stand-by power supply input are connected with power supply 1, power supply 2 respectively, and power output end is connected with load (being Metal halogen lamp in figure).Described duplicate supply switch unit comprises detecting unit, control unit, mechanical double power supply converting switch and auxiliary power unit; Detecting unit is used for detecting in real time the input voltage of main power source input and stand-by power supply input, and control unit controls double power supply converting switch according to the testing result of detecting unit thus realizes the automatic conversion of active and standby power supply.As shown in Figure 1, the auxiliary power unit in the present embodiment comprises transformer, rectification circuit, storage capacitor and inversion unit, and the input of step-up transformer is connected with the outlet side (also can be power supply 1 or power supply 2) of double power supply converting switch.Be in the process of load supplying at power supply 1 or power supply 2, auxiliary power unit is in energy storage pattern, and the electric energy that power supply 1 or power supply 2 export is through transformer boost and after being rectified into the direct current with high voltage, be stored in storage capacitor; When controller detects the Voltage Drop of work at present power supply (being power supply 1 in figure), then control unit controls the switching that double power supply converting switch carries out power supply, and control auxiliary power unit and enter mode of operation, the electric energy that storage capacitor stores exports as load supplying through inversion unit, in the handoff procedure of power supply 1 and power supply 2, carry out outputs power supply by auxiliary power unit to load; After double power supply converting switch completes switching, controller controls inversion unit to be stopped exporting, and auxiliary power unit enters energy storage pattern again.Transformer in the present embodiment also can be arranged between inversion unit and power output end.Carefully analyze and can find, if the input of auxiliary power unit (i.e. the input of transformer) is connected with power supply 1 or power supply 2, then in double power supply converting switch handoff procedure, auxiliary power unit can directly from power supply 1 or power supply 2 power taking supply load, storage capacitor then in auxiliary power unit can be removed, or being replaced by filter capacitor, auxiliary power unit is now direct-furnish type.
Fig. 2 shows the structural principle of the second embodiment of the utility model dual power supply system.Auxiliary power unit in the present embodiment comprises the rectification circuit, recharged capacitance, DC/DC circuit, storage capacitor, the inversion unit that connect successively, and the input of rectification circuit is connected with the outlet side (also can be power supply 1 or power supply 2) of double power supply converting switch.When auxiliary power unit is in energy storage pattern, institute's received energy is stored in recharged capacitance by rectification circuit, be that suitable direct voltage is powered to inversion unit by DC/DC circuit conversion, and DC bus-bar voltage can be maintained be in a high voltage, and by stored energy among storage capacitor, thus provide enough energy for inversion unit; Similarly, when controller detects that the Voltage Drop of work at present power supply (in figure for power supply 1) or other reason need Switching power, then control unit controls the switching that double power supply converting switch carries out power supply, and control auxiliary power unit and enter mode of operation, inversion unit starts to export as load supplying, in the handoff procedure of power supply 1 and power supply 2, carry out outputs power supply by auxiliary power unit to load; After double power supply converting switch completes switching, controller controls inversion unit to be stopped exporting, and auxiliary power unit enters energy storage pattern again.Same, input (i.e. the input of rectification circuit) as auxiliary power unit is connected with power supply 1 or power supply 2, then in double power supply converting switch handoff procedure, auxiliary power unit can directly from power supply 1 or power supply 2 power taking supply load, storage capacitor then in auxiliary power unit can be removed, or being replaced by filter capacitor, auxiliary power unit is now direct-furnish type.Wherein, the DC/DC circuit for regulation voltage also can replace with transformer, as long as before transformer is arranged at rectification unit or after inversion unit.
Fig. 3 shows the structural principle of the third embodiment of the utility model dual power supply system.As shown in Figure 3, the structure of auxiliary power unit is wherein identical with Fig. 2.As shown in Figure 3, the input of rectification circuit is connected with the outlet side of a change over switch, two inputs of change over switch and control end are connected with main power source input, stand-by power supply input, control unit respectively, the conversion logic of described change over switch is contrary with the switch logic of double power supply converting switch, and (after namely double power supply converting switch switches to power supply 1 from power supply 2, change over switch switches to power supply 2 from power supply 1; After double power supply converting switch switches to power supply 2, change over switch switches to power supply 1).Power supply 1 is in load normal power supply process, and the storage capacitor in auxiliary power unit extracts electric energy from power supply 2 and stores; When control unit detects that the Voltage Drop of power supply 1 or other reason need Switching power, control unit controls the switching that double power supply converting switch carries out power supply, and control auxiliary power unit and enter mode of operation, inversion unit starts to export as load supplying, in the handoff procedure of power supply 1 and power supply 2, carry out outputs power supply by auxiliary power unit to load; After double power supply converting switch completes switching, controller controls change over switch and switches to power supply 1, and control inversion unit to stop exporting, now load is directly powered by power supply 2, and storage capacitor in auxiliary power unit extracts electric energy from power supply 1 and stores (if power supply 1 can normal power supply).Similarly, due in double power supply converting switch handoff procedure, auxiliary power unit can directly from power supply 1 or power supply 2 power taking supply load, and the storage capacitor therefore in auxiliary power unit can be removed, or being replaced by filter capacitor, auxiliary power unit is now direct-furnish type.DC/DC circuit for regulation voltage also can replace with the transformer before being arranged at rectification unit or after inversion unit.
Fig. 4 shows the structural principle of the 4th kind of embodiment of the utility model dual power supply system.As shown in Figure 4, auxiliary power unit wherein comprises the first rectification circuit, the second rectification circuit, recharged capacitance, DC/DC circuit, storage capacitor, inversion unit, the input of the first rectification circuit, the second rectification circuit connects main power source input, stand-by power supply input respectively, is connected successively after the output of the first rectification circuit, the second rectification circuit is interconnected with recharged capacitance, DC/DC circuit again.Two-way rectification circuit is jointly stored in recharged capacitance, is powered by DC/DC circuit to inversion unit after being received from power supply 1 and power supply 2 by energy, and can maintain DC bus-bar voltage and be in a high voltage.When control unit detects that the Voltage Drop of power supply 1 or other reason need Switching power, control unit controls the switching that double power supply converting switch carries out power supply, and control auxiliary power unit and enter mode of operation, inversion unit starts to export as load supplying, in the handoff procedure of power supply 1 and power supply 2, carry out outputs power supply by auxiliary power unit to load; After double power supply converting switch completes switching, controller controls inversion unit to be stopped exporting.Because two-way rectification circuit extracts electric energy from power supply 1, power supply 2 respectively, therefore in double power supply converting switch handoff procedure, auxiliary power unit has external electric energy to input all the time, therefore the storage capacitor in auxiliary power unit can be removed, or being replaced by filter capacitor, auxiliary power unit is now direct-furnish type.DC/DC circuit wherein also can replace with the transformer after being arranged at inversion unit.
Fig. 5 shows the structural principle of the 5th kind of embodiment of the utility model dual power supply system.As shown in Figure 5, the auxiliary power unit in the present embodiment is the two-way inverter that one end is connected with energy storage component, and the other end of two-way inverter connects load.When power supply 1 normally works, two-way inverter is rectification energy storage pattern, draws electric energy be stored in energy storage component from load end after over commutation; When control unit detects that the Voltage Drop of power supply 1 or other reason need Switching power, control unit controls the switching that double power supply converting switch carries out power supply, and control auxiliary power unit and enter mode of operation, two-way inverter enters inversion output state, for load supplying, in the handoff procedure of power supply 1 and power supply 2, by auxiliary power unit, output is carried out to load power; After double power supply converting switch completes switching, controller controls two-way inverter and again enters rectification energy storage pattern.Two-way DC/DC circuit can also be accessed further between two-way inverter and energy storage component, boost when forward inversion exports, carry out step-down during reverse rectification energy storage, thus the required capacity of energy storage component can be reduced.
The switching control method of the utility model dual-power automatic switching device comprises the following steps:
Step 1, the detecting unit input voltage to main power source input and/or stand-by power supply input detects in real time, and testing result is transferred to control unit;
Step 2, control unit carry out computing to input voltage, and judge that the voltage effective value of work at present power supply is whether within the scope of the voltage effective value preset, and in this way, then goes to step 1, as no, then goes to step 3;
Step 3, control unit control double power supply converting switch and carry out active and standby electrical source exchange, and control auxiliary power unit and start to export to load, in active and standby electrical source exchange process, carry out outputs power supply by auxiliary power unit to load;
Step 4, complete active and standby electrical source exchange when double power supply converting switch, control unit controls auxiliary power unit to be stopped exporting load, then goes to step 1.
Following several situation can be divided in step 3:
1, control unit transmit control signal control double power supply converting switch carry out active and standby electrical source exchange, control unit controls auxiliary power unit in the time period carry out action to the contact system of double power supply converting switch after control unit transmits control signal before and start to export to load.
2, control unit transmits control signal and controls double power supply converting switch and carry out active and standby electrical source exchange, and simultaneously control unit transmits control signal and controls auxiliary power unit and start to export to load.
3, control unit transmit control signal control auxiliary power unit start to export to load, then control unit send
Control signal controls double power supply converting switch and carries out active and standby electrical source exchange.
The utility model is not only applicable to single-phase load, is also applicable to multiphase load, and namely Fig. 6 shows a kind of specific implementation circuit of the utility model dual power supply system adopting three-phase four-wire system.Wherein, S1, S2 are respectively two-way power supply, and two inputs of double power supply converting switch are connected with S1 with S2 respectively, and the output of double power supply converting switch is connected with load.As shown in the figure, the input of auxiliary power unit is connected with power supply S2, by rectifier bridge, alternating current is transformed into direct current, then is connected with the input of inversion unit through boost booster circuit.The DC bus energy storage of inversion unit adopts electric capacity C1, C2 series connection accumulation, and same C1, C2 mid point of zero line of load is connected, and the output of inversion unit is connected with load end.Control unit is connected with inversion unit with detecting unit, double power supply converting switch respectively, is responsible for the Detection Information receiving detecting unit output, and controls double power supply converting switch and inversion unit.Detecting unit detects power supply S1, S2 information of voltage in real time, judges whether S1 voltage falls or lifting.By rectifier bridge, alternating current is transformed into direct current, and Large Copacity storage capacitor C is charged.Control unit control boost booster circuit boosts to output voltage, and C1, C2 two ends total voltage is raised to 800V.Direct current is transformed into alternating current by the three phase inverter bridge that control unit controls in inversion unit, exports load to through LCL filter.
The workflow of above-mentioned dual power supply system is as shown in Figure 7, specific as follows:
Detecting unit detects the voltage signal of power supply S1, power supply S2 in real time
e 1,
e 2, calculate the effective value of power supply S1 voltage
v 1rms, and carry out phase-locked to S1, S2;
Suppose voltage effective value scope that load normally works for [
v rmsMIN,
v rmsMAX], when
v rmsMIN≤
v 1rms≤
v rmsMAXtime, auxiliary power unit works in energy storage pattern, and line voltage charges to storage capacitor C through rectifier bridge, and the total voltage at C1, C2 two ends, through boost booster circuit, is risen to 800V and keeps constant by C both end voltage; Double power supply converting switch does not switch, and inversion unit does not export electric energy to load, load terminal voltage
u a ,
u b with
u c equal with power supply S1 voltage;
When
v 1rms<
v rmsMINor
v 1rms>
v rmsMAXtime, control unit controls double power supply converting switch and is converted to power supply S2, and control auxiliary power unit and enter mode of operation, auxiliary power unit to voltage with frequency, homophase of load output and power supply S2, and controls output voltage by inversion unit
u a ,
u b with
u c meet simultaneously
v rmsMIN≤
u rms≤
v rmsMAX;
When after the converting of double power supply converting switch, control unit controls inversion unit to be stopped exporting electric energy to load.
Claims (20)
1. a dual-power automatic switching device, comprising: main power source input, stand-by power supply input, power output end, duplicate supply switch unit; Described duplicate supply switch unit comprises detecting unit, control unit, mechanical double power supply converting switch, detecting unit is used for detecting in real time the input voltage of main power source input and stand-by power supply input, and control unit controls double power supply converting switch according to the testing result of detecting unit thus realizes the automatic conversion of active and standby power supply; It is characterized in that, described duplicate supply switch unit also comprises an auxiliary power unit, and described auxiliary power unit comprises inversion unit, and the output of inversion unit is connected with described power output end, and the control end of inversion unit is connected with control unit; Control unit, in the transfer process of active and standby power supply, controls auxiliary power unit and exports electric energy.
2. dual-power automatic switching device as claimed in claim 1, it is characterized in that, described auxiliary power unit also comprises energy storage component and rectification unit; Rectification unit is used for extracting electric energy supply energy storage component from main power source and/or stand-by power supply; Described energy storage component carries out energy storage at main power source and stand-by power supply powering phase by described rectification unit, in the transfer process of active and standby power supply, export electric energy by described inversion unit.
3. dual-power automatic switching device as claimed in claim 2, it is characterized in that, described auxiliary power unit also comprises the change over switch be connected with rectification unit, two inputs of described change over switch and control end are connected with main power source input, stand-by power supply input, control unit respectively, described rectification unit is connected with rear class energy storage component, and the conversion logic of described change over switch is contrary with the switch logic of double power supply converting switch.
4. dual-power automatic switching device as claimed in claim 2, is characterized in that, the input of described rectification unit and the outlet side of described double power supply converting switch or main power source or stand-by power supply are connected.
5. dual-power automatic switching device as claimed in claim 2, it is characterized in that, described rectification unit comprises the first rectification circuit and the second rectification circuit, the input of the first rectification circuit, the second rectification circuit connects main power source input, stand-by power supply input respectively, and the output of the first rectification circuit, the second rectification circuit is interconnected and is connected with rear class energy storage component afterwards.
6. dual-power automatic switching device as claimed in claim 2, it is characterized in that, described energy storage component is storage capacitor.
7. dual-power automatic switching device as claimed in claim 2, it is characterized in that, described auxiliary power unit also comprises regulator.
8. dual-power automatic switching device as claimed in claim 7, it is characterized in that, described regulator is transformer, before being arranged at rectification unit or after inversion unit.
9. dual-power automatic switching device as claimed in claim 7, it is characterized in that, described regulator is DC/DC circuit, before or after being arranged at energy storage component.
10. dual-power automatic switching device as claimed in claim 1, it is characterized in that, described inversion unit is the two-way inverter that one end is connected with energy storage component, and the other end of two-way inverter is connected with described power output end.
11. dual-power automatic switching devices as claimed in claim 10, it is characterized in that, described two-way inverter is connected by two-way DC/DC circuit with energy storage component.
12. dual-power automatic switching devices as claimed in claim 10, is characterized in that: described energy storage component is storage capacitor.
13. dual-power automatic switching devices as claimed in claim 1, it is characterized in that, described auxiliary power unit also comprises rectification unit; Rectification unit is used for extracting electric energy from main power source or stand-by power supply, in the transfer process of active and standby power supply, export electric energy by described inversion unit.
14. dual-power automatic switching devices as claimed in claim 13, it is characterized in that, described auxiliary power unit also comprises the change over switch be connected with rectification unit, two inputs of described change over switch and control end are connected with main power source input, stand-by power supply input, control unit respectively, described rectification unit is connected with later stage inversion unit, and the conversion logic of described change over switch is contrary with the switch logic of double power supply converting switch.
15. dual-power automatic switching devices as claimed in claim 13, it is characterized in that, described rectification unit comprises the first rectification circuit and the second rectification circuit, the input of the first rectification circuit, the second rectification circuit connects main power source input, stand-by power supply input respectively, and the output of the first rectification circuit, the second rectification circuit is interconnected and is connected with later stage inversion unit afterwards.
16. dual-power automatic switching devices as claimed in claim 13, it is characterized in that, the input of described rectification unit is connected with main power source or stand-by power supply.
17. dual-power automatic switching devices as claimed in claim 13, it is characterized in that, described auxiliary power unit also comprises regulator.
18. dual-power automatic switching devices as claimed in claim 17, it is characterized in that, described regulator is transformer, before being arranged at rectification unit or after inversion unit.
19. dual-power automatic switching devices as claimed in claim 17, it is characterized in that, described regulator is DC/DC circuit, is arranged between rectification unit and inversion unit.
20. 1 kinds of dual power supply systems, comprise main power source, stand-by power supply and dual-power automatic switching device as described in any one of claim 1 ~ 19, main power source input, the stand-by power supply input of dual-power automatic switching device are connected with main power source, stand-by power supply respectively.
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| CN106159959A (en) * | 2016-08-08 | 2016-11-23 | 王祥胜 | A kind of continuously-running dynamic electric voltage recovery device of improvement |
| CN106655156A (en) * | 2016-10-18 | 2017-05-10 | 国网山东省电力公司烟台供电公司 | Automatic load control terminal switching device of dual-power-supply user |
| CN106972617A (en) * | 2017-03-29 | 2017-07-21 | 中国航空无线电电子研究所 | Power redundancy backup device applied to modularization avionics system |
| CN110611364A (en) * | 2018-06-14 | 2019-12-24 | 中网电力科技有限公司 | Automatic dual-power conversion device and method for high-voltage intelligent vacuum circuit breaker |
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2015
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| CN105024450A (en) * | 2015-08-10 | 2015-11-04 | 常熟开关制造有限公司(原常熟开关厂） | Dual-power-source automatic conversion device and conversion control method thereof and dual-power-source power supply system |
| CN105024450B (en) * | 2015-08-10 | 2019-11-29 | 常熟开关制造有限公司(原常熟开关厂） | Dual-power automatic switching device and its switching control method, dual power supply system |
| CN106159959A (en) * | 2016-08-08 | 2016-11-23 | 王祥胜 | A kind of continuously-running dynamic electric voltage recovery device of improvement |
| CN106655156A (en) * | 2016-10-18 | 2017-05-10 | 国网山东省电力公司烟台供电公司 | Automatic load control terminal switching device of dual-power-supply user |
| CN106972617A (en) * | 2017-03-29 | 2017-07-21 | 中国航空无线电电子研究所 | Power redundancy backup device applied to modularization avionics system |
| CN110611364A (en) * | 2018-06-14 | 2019-12-24 | 中网电力科技有限公司 | Automatic dual-power conversion device and method for high-voltage intelligent vacuum circuit breaker |
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