CN103066691A - Alternating current-direct current double-input single-output power distribution system with interlocking switchover function - Google Patents
Alternating current-direct current double-input single-output power distribution system with interlocking switchover function Download PDFInfo
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Abstract
The invention provides an alternating current-direct current double-input single-output power distribution system with an interlocking switchover function. The alternating current-direct current double-input single-output power distribution system with the interlocking switchover function comprises an input unit, an output unit, an insulation monitoring unit, a current detecting unit and a human-computer interface. The input unit enables inputting alternating current to be connected with an alternating current input end of the output unit, and enables inputting direct current to be connected with a direct current input end of the output unit. The alternating current-direct current double-input single-output power distribution system with the interlocking switchover function has the advantages that the alternating current-direct current double-input single-output power distribution system with the interlocking switchover function provides a high-voltage direct current and alternating current double-input switchover power distribution output power supply system, when any circuit of the high-voltage direct current or alternating current breaks down, the alternating current-direct current double-input single-output power distribution system with the interlocking switchover function can still provide power supply to electric equipment and enable the electric equipment to work normally, by using an electric leakage sensor and an electric current leakage sensor for detecting corresponding signal abnormity, the alternating current-direct current double-input single-output power distribution system with the interlocking switchover function changes the output, and therefore the switchover is convenient and accurate.
Description
Technical field
The present invention relates to the supplying electricity and power distribution technology, refer to especially a kind of DC power supply and AC power dual input, by the feeding distribution system of interlocking switching device shifter output.
Background technology
China as far back as the nineties in 20th century computer power supply round Realization Switching Power Supply, take the lead in finishing computer power supply and update.Switching Power Supply has been widely used among various electronics, electric equipment, stored-program control exchange, communication, electric power checkout equipment power supply and the control appliance power supply since entering the nineties.Present most of device interior has a Switching Power Supply, when being input as alternating current, the rectifier bridge conducting direction is alternately to change, after rectification, be transformed into the high voltage direct current of a fluctuation, and then the low-voltage DC that step-down becomes CPU, LED and all kinds of electronic devices and components to work through the DC/DC circuit variation.When being input as high voltage direct current, rectifier bridge is monolateral conducting, and conducting direction is constant, obtains a stable high voltage direct current this moment in the rectifier bridge rear end, the low-voltage DC that becomes CPU, LED and all kinds of electronic devices and components to work in the step-down through the DC/DC circuit variation.Therefore as long as to suitable direct voltage of Switching Power Supply input, Switching Power Supply can work fully.
In recent years, along with the development of science and technology, various novel precise power consumption equipments are widely applied, and have higher requirement for safety and the reliability of power supply.Development along with power supply and power supply technique, novel DC power-supply system has appearred, the Novel DC electric power system is compared with traditional UPS, safe and reliable, energy-conservation, the aspects such as maintainability and construction cost have obvious advantage, and have promoted the use of DC power-supply system in data center, substitute traditional UPS power supply.
But along with the continuous expansion of the application of Novel DC electric power system, power consumption equipment becomes increasingly complex, and has run into some new problems, and switch power supply equipment is supported direct current supply, but is that non-switch power supply equipment just can't use direct current supply.So even DC power-supply system has obvious advantage, the application places that this has also limited DC power-supply system has greatly strengthened its difficulty of applying.
In a single day power-off fault appears in DC power-supply system simultaneously, and in the situation of batteries power drain, electric power system will be in " power failure " state.If stand-by power supply is arranged, can enable stand-by power supply and recover supply of electric power.
But in known feeding distribution system, only has the feeding distribution system of single power supply.In alternating-current system, AC circuit breaker with exchange little circuit breaker and be installed in the feeding distribution system, in order to realize the distribution of alternating current, the break-make of supply line, current-limiting protection and short-circuit protection; In the direct current supply distribution system, the little circuit breaker of fuse, dc circuit breaker and direct current is installed in the feeding distribution system, in order to realize galvanic distribution, the break-make of supply line, current-limiting protection and short-circuit protection.
Current, because the direct current supply technology just rises, DC power-supply system in actual applications, rectification module easily breaks down, even " deadlock ".Although have batteries in the direct current system, when exhaustion of the accumulators, there are not other stand-by power supplies, power consumption equipment just can't work on.Even other stand-by power supplies are arranged, if do not have a kind of power supply technique that switches fast with DC power-supply system, also soon quick-recovery supply of electric power.
In view of above-mentioned reason, we need to develop a kind of novel supplying electricity and power distribution technology, be applicable to mutually switch between two kinds of power supplys and select output, can select output DC or alternating current for switch power supply equipment, can only select the output AC electricity for non-switch power supply equipment.Need to switch to another power supply when alternating current or direct current have a power failure simultaneously, reach the mutually redundant effect of alternating current and direct current.Also will guarantee Electrical Safety at last, the alternating current-direct current switching device shifter must be simple and safe reliable.
Summary of the invention
In view of this, purpose of the present invention just provides the single output distribution of the alternating current-direct current dual input system with interlocking handoff functionality.
For achieving the above object, the present invention adopts following technical scheme:
Comprise input unit, output unit, insulation detecting unit, current measuring unit, man-machine interface.
Input unit is connected the alternating current of inputting with the ac input end of output unit, the direct current of inputting is connected with the direct-flow input end of output unit.
Input unit comprises for the AC circuit breaker of break-make interchange input and the dc circuit breaker of break-make direct current input.
Output unit, its input link together with AC circuit breaker Q1 and the dc circuit breaker of input unit respectively.
Output unit comprises that break-make output is with the miniature circuit breaker of mechanical interlock.The miniature circuit breaker of described this type band mechanical interlock is comprised of the circuit breaker of 2 2P, and there is the mechanical device of an interlocking inside.
Insulation is provided with the insulation detecting circuit that the test side links to each other with leakage current sensor in the output unit miniature circuit breaker output in the detecting unit.
Leakage current sensor is passed at the two poles of the earth of described output unit miniature circuit breaker output.
The insulation detecting unit also comprises a processor, described leakage current sensor comprise according to miniature circuit breaker output magnetic flux change produce faradic soft magnet core and detect corresponding induced current and export to the insulation detecting unit testing circuit, the processor input links to each other with the output of leakage current sensor respectively.
Be provided with the current detection circuit that the test side links to each other with Hall element in the output unit miniature circuit breaker output in the current measuring unit.
Current measuring unit also comprises a processor, described Hall element comprises that variation produces the magnetic core of induced field and responds to by the magnetic field of magnetic core gathering and the hall device of output voltage signal according to the miniature circuit breaker output end current, and the amplifying circuit that this voltage signal is amplified, the processor input links to each other with the output of Hall element respectively.
Utmost point in the described output unit miniature circuit breaker output passes Hall element.
Man-machine interface is connected with insulation detecting unit, current measuring unit communication respectively, monitors above cell operation state.
Man-machine interface comprises liquid crystal display and nucleus module processing unit.
The nucleus module processing unit also comprises a processor, and the processor input is connected with the output of insulating monitoring unit, current detecting unit respectively, and the information of collecting is sent to liquid crystal display.
The invention has the beneficial effects as follows: the invention provides a kind of DC power supply and AC power dual input interlocking and switch the feeding distribution system of single output, when direct current or the arbitrary power supply of alternating current break down, can also switch to fast another power supply by the interlocking switching device shifter, fast quick-recovery supply of electric power; Can detect corresponding ground connection abnormal signal and circuit overcurrent alarm signal by electricity leakage sensor and Hall current sensor, improve electrical safety.
Description of drawings
Fig. 1 is feeding distribution system theory structure sketch of the present invention;
Fig. 2 is the schematic diagram that feeding distribution system of the present invention has increased current detecting unit;
Fig. 3 is used miniature circuit breaker schematic diagram with mechanical interlock in the feeding distribution system of the present invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
With reference to Fig. 1, the invention provides a kind of single output distribution of alternating current-direct current dual input system with interlocking handoff functionality, mainly comprise:
Comprise input unit, output unit, insulation detecting unit, current measuring unit, man-machine interface.
Input unit is connected the alternating current of inputting with the ac input end of output unit, the direct current of inputting is connected with the direct-flow input end of output unit.
Input unit comprises for the AC circuit breaker Q1 of break-make interchange input and the dc circuit breaker Q2 of break-make direct current input.
Output unit, its input link together with AC circuit breaker Q1 and the dc circuit breaker Q2 of input unit respectively.
Output unit comprises that break-make output is with the miniature circuit breaker QC of mechanical interlock.
Insulation is provided with in the detecting unit to detect surveys the insulation detecting circuit that end links to each other with leakage current sensor SL in the output unit miniature circuit breaker QC output.
Described leakage current sensor SL when any utmost point generation earth fault of output unit miniature circuit breaker QC output, can measure other current signal of milliampere level of this utmost point.
The insulation detecting unit also comprises a processor, also comprise a processor, described leakage current sensor bag SL draw together according to miniature circuit breaker QC output magnetic flux change produce faradic soft magnet core and detect corresponding induced current and export to the insulation detecting unit testing circuit, the processor input links to each other with the output of leakage current sensor SL respectively.When any utmost point generation earth fault of output unit miniature circuit breaker QC output, in time gather little current signal that leakage current sensor SL measures, calculate corresponding insulation information and should insulation information be sent to man-machine interface.
Present feeding distribution system is a very huge multiple-limb supply network.In the ordinary course of things, one point earth does not affect the operation of using electricity system, if but can not find rapidly earth fault and repaired, another earth fault occurs again, just may cause the generation of significant trouble.Leakage current sensor SL is around on the two poles of the earth output line that is installed in output unit miniature circuit breaker QC output, when the device operation, detect in real time the signal of each branch sensor output, when branch road insulation situation is normal, the size of current of flows through sensor equates, opposite direction, its output signal are zero; When branch road had ground connection, the electric current that flows to the leakage current sensor coil was not equal to the electric current that flows out the leakage current sensor coil, and the equivalent current of leakage current sensor is non-vanishing.Therefore by detecting little size of current value and the direction of each branch road leakage current sensor, just can judge which utmost point ground connection in the feeding distribution system, fast finding and location ground connection branch road sequence number, and calculate corresponding grounding resistance.
Man-machine interface is connected with insulation detecting unit, current detecting unit communication respectively, monitors above cell operation state.
Man-machine interface comprises liquid crystal display and nucleus module processing unit.
The nucleus module processing unit also comprises a processor, and the processor input is connected with the output of insulating monitoring unit, current detecting unit respectively, and the information of collecting is sent to liquid crystal display.
With reference to Fig. 2, be provided with the current detection circuit that the monitoring side links to each other with Hall element H in the output unit miniature circuit breaker QC output in the current detecting unit.
Described Hall element H can measure the current value that output unit miniature circuit breaker QC output actual flow is crossed.
Current detecting unit also comprises a processor, described Hall element H comprises that variation produces the magnetic core of induced field and responds to by the magnetic field of magnetic core gathering and the hall device of output voltage signal according to miniature circuit breaker QC output end current, and the amplifying circuit that this voltage signal is amplified, the processor input links to each other with the output of Hall element H respectively.Can detect the size of current of output unit miniature circuit breaker QC output, and in time the current information of collecting is sent to man-machine interface.
Hall element H is around on the utmost point output lead that is installed in output unit miniature circuit breaker QC output, in wire, there is electric current to flow through, namely when electric current passes through Hall element H magnetic core coil, produce magnetic field, its electric current big or small and in the wire is directly proportional, Hall element H converts the field signal that produces to voltage signal output, calculates size through electric current in the wire with this.
With reference to Fig. 3, the miniature circuit breaker QC of this type band mechanical interlock described in the distribution system of the present invention is comprised of the circuit breaker of 2 2P, and there is the mechanical device of an interlocking inside.Can only have a circuit breaker to be in "on" position, another circuit breaker can't close a floodgate, and only has behind one of them circuit breaker trip, and another circuit breaker could close a floodgate.This miniature circuit breaker plays the effect of current-limiting protection and short-circuit protection simultaneously.The circuit breaker of the type is connected in parallel the output of the corresponding polarity of two-way, just can satisfy simply, the reliably and rapidly requirement that alternating current-direct current switches.Power consumption equipment can switch between direct current that DC power-supply system provides and alternating current at any time, to reach each other the mutually purpose of backup.
Claims (10)
1. have the single output distribution of the alternating current-direct current dual input system of interlocking handoff functionality, it is characterized in that comprising:
1) input unit is connected the alternating current of inputting with the ac input end of output unit, the direct current of inputting is connected with the direct-flow input end of output unit;
2) output unit, its input link together with AC circuit breaker and the dc circuit breaker of input unit respectively;
3) insulation is provided with the insulation detecting circuit that the leakage current sensor in the miniature circuit breaker output of monitoring side and output unit links to each other in the detecting unit;
4) be provided with the current detection circuit that the test side links to each other with Hall element H in the output unit miniature circuit breaker output in the current measuring unit;
5) man-machine interface is connected with insulation detecting unit, current measuring unit communication respectively, monitors above cell operation state.
2. the single output distribution of the alternating current-direct current dual input system with interlocking handoff functionality according to claim 1 is characterized in that: described input unit comprises for break-make and exchanges the AC circuit breaker of input and the dc circuit breaker of break-make direct current input.
3. the single output distribution of the alternating current-direct current dual input system with interlocking handoff functionality according to claim 1, it is characterized in that: described output unit comprises that break-make output is with the miniature circuit breaker of mechanical interlock, the miniature circuit breaker of described this type band mechanical interlock is comprised of the circuit breaker of 2 2P, and inside is provided with the mechanical device of an interlocking.
4. the single output distribution of the alternating current-direct current dual input system with interlocking handoff functionality according to claim 1 is characterized in that: be provided with the insulation detecting circuit that the test side links to each other with leakage current sensor in the output unit miniature circuit breaker output in the described insulation detecting unit.
5. the single output distribution of the alternating current-direct current dual input system with interlocking handoff functionality according to claim 4, it is characterized in that: leakage current sensor is passed at the two poles of the earth of described output unit miniature circuit breaker output.
6. the single output distribution of the alternating current-direct current dual input system with interlocking handoff functionality according to claim 4, it is characterized in that: the insulation detecting unit also comprises a processor, described leakage current sensor comprise according to miniature circuit breaker output magnetic flux change produce faradic soft magnet core and detect corresponding induced current and export to the insulation detecting unit testing circuit, the processor input links to each other with the output of leakage current sensor respectively.
7. the single output distribution of the alternating current-direct current dual input system with interlocking handoff functionality according to claim 1, it is characterized in that: described current measuring unit also comprises a processor, described Hall element comprises that variation produces the magnetic core of induced field and responds to by the magnetic field of magnetic core gathering and the hall device of output voltage signal according to the miniature circuit breaker output end current, and the amplifying circuit that this voltage signal is amplified, the processor input links to each other with the output of Hall element respectively.
8. the single output distribution of the alternating current-direct current dual input system with interlocking handoff functionality according to claim 7, it is characterized in that: the utmost point in the described output unit miniature circuit breaker output passes Hall element H.
9. the single output distribution of the alternating current-direct current dual input system with interlocking handoff functionality according to claim 1, it is characterized in that: described man-machine interface comprises liquid crystal display and nucleus module processing unit.
10. the single output distribution of the alternating current-direct current dual input system with interlocking handoff functionality according to claim 9, it is characterized in that: described nucleus module processing unit also comprises a processor, and the processor input is connected with the output of insulation detecting unit, current measuring unit respectively.
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| CN2013100043869A CN103066691A (en) | 2013-01-06 | 2013-01-06 | Alternating current-direct current double-input single-output power distribution system with interlocking switchover function |
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| CN2013100043869A CN103066691A (en) | 2013-01-06 | 2013-01-06 | Alternating current-direct current double-input single-output power distribution system with interlocking switchover function |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109633359A (en) * | 2019-01-10 | 2019-04-16 | 许继电源有限公司 | Single busbar ground insulation monitoring method and monitoring device in a kind of triple bus-bar |
| CN109633360A (en) * | 2019-01-10 | 2019-04-16 | 许继电源有限公司 | Single busbar ground insulation monitoring method and monitoring device in triple bus-bar |
| CN113147518A (en) * | 2021-04-21 | 2021-07-23 | 重庆中车长客轨道车辆有限公司 | Power supply system conversion method for rail transit contact network |
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| CN109633359A (en) * | 2019-01-10 | 2019-04-16 | 许继电源有限公司 | Single busbar ground insulation monitoring method and monitoring device in a kind of triple bus-bar |
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Application publication date: 20130424 |