CN103066684A - High voltage direct current power supply system - Google Patents

High voltage direct current power supply system Download PDF

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Publication number
CN103066684A
CN103066684A CN2013100045506A CN201310004550A CN103066684A CN 103066684 A CN103066684 A CN 103066684A CN 2013100045506 A CN2013100045506 A CN 2013100045506A CN 201310004550 A CN201310004550 A CN 201310004550A CN 103066684 A CN103066684 A CN 103066684A
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China
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circuit
direct current
output
input
unit
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沈亚斌
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ZHEJIANG ZHONGTAN TECHNOLOGY Co Ltd
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ZHEJIANG ZHONGTAN TECHNOLOGY Co Ltd
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Priority to CN2013100045506A priority Critical patent/CN103066684A/en
Publication of CN103066684A publication Critical patent/CN103066684A/en
Priority to PCT/CN2014/070075 priority patent/WO2014106469A1/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/02Circuit arrangements for ac mains or ac distribution networks using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20End-user application control systems

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Direct Current Feeding And Distribution (AREA)
  • Stand-By Power Supply Arrangements (AREA)

Abstract

The invention provides a high voltage direct current power supply system which is capable of not only outputting direct current, but also switching to output alternating current according to requirements, and enables high voltage direct current power supply to apply to most application fields. The high voltage direct current power supply system has the advantages of obvious energy-saving effect, high security and reliability, easy maintenance, low investment cost and the like. The high voltage direct current power supply system comprises a high voltage direct current electrical source, a backup alternating current electrical source and an alternating current and direct current switching and outputting unit used for interlocking and switching the high voltage direct current electrical source and the backup alternating current electrical source to output to electrical equipment. The high voltage direct current power supply system further has the advantages that the high voltage direct current electrical source and the backup alternating current electrical source are dual input and the high voltage direct current are output, alternating current can be output by the alternating current and direct current switching and outputting unit, and meanwhile the high voltage direct current electrical source and the backup alternating current electrical source have a mutual backup function.

Description

The high voltage direct current electric power system
Technical field
The present invention relates to power supply and uninterrupted power supply power supply technique, refer to especially a kind of high-voltage DC power supply and direct current supply distribution system.
Background technology
Along with the continuous propelling of the unit business such as finance, securities exchange center, customs, government, the continuous atrophy of traditional business and the relevant power consumption equipment that supports traditional business, what bring is the rapid expanding of data service and novel relevant device thereupon.And the power supply of giving these power devices still adopts traditional ac uninterrupted power supply system (UPS) power supply.Along with the rapid growth of transition business and value-added service amount, the problem of the aspects such as pattern fail safe in these per-unit systems, reliability and economy of interchange UPS power supply is more and more serious, is mainly reflected in following several respects:
Energy consumption is high.Because exchange among the UPS and adopted inverter, batteries is connected on the inverter prime, the power supply conversion links is many, and this just causes efficient very low.Be to guarantee the security reliability of equipment electricity consumption, in exchanging the ups power system, basically adopt 1+1 parallel operation redundancy backup system or 2+1 parallel operation redundancy backup system at present, this just so that system effectiveness further reduce.Because UPS is an integral device, considers the later stage development plan, the computer room construction initial stage, the just necessary one-time-reach-place of ups system construction, but professional development is a progressive process in actual the use, this is just so that the average service efficiency of UPS is lower.Comprehensive above-mentioned reason, the average service efficiency that exchanges ups system generally only has 50%.
Security reliability is low.Exchange in the ups power system, with regard to single device, by redundant technique its UPS power supply reliability is greatly improved, but with regard to whole UPS electric power system, system's single point failure point that much can not back up is arranged, such as synchronous parallel operation plate, static switch, output dip switch etc., these single point failure point all may cause whole electric power system " power failure " paralysis.In addition, batteries is connected on the inverter prime, in case inverter breaks down, just can cause whole electric power system " power failure " paralysis.
On-line maintenance, dilatation difficulty are large.Owing to exchanging the isosynchronous problem of frequency, voltage, phase sequence, phase place, waveform that the UPS dilatation relates to alternating current, only paying close attention to parameter of voltage unlike dilatation in the direct current system.So exchanging each time online dilatation of UPS all is once arduous risk operation, even may because UPS manufacturer self product up-gradation updates so that the UPS dilatation is impossible, can't replace when causing UPS equipment separate unit fault.
Installed capital cost is large.Along with the growth of business and the rapid expanding of novel relevant device, according to existing power devices pattern, the annual a large amount of new interchange ups system of construction that needs.The investment construction cost is very large, especially relates to the important scenes such as core network, important service platform, VIP client's business, from ensuring safety angle, often selects the import ups system, this just so that construction cost further strengthen.
 
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.
We know when alternating current is 220V, and its actual crest voltage has 311V, and this just requires the voltage withstand class of components and parts all will be higher than crest voltage.So the ceiling voltage the when direct voltage of the 270V that we select is lower than alternating current work is conducive to the withstand voltage safety and reliability of components and parts.
When being input as alternating current 220V, its Equivalent DC voltage is lower when being 220V(consideration power factor).During the power invariability of power consumption equipment, according to Ohm's law, voltage raises, and electric current descends.When inputting the direct current of 270V, voltage has raise, and electric current is reduced to 0.81 times of interchange.According to heat Calculation formula: Q1=K * I2 * R * T, the input resistance R that supposes Switching Power Supply is constant, the caloric value of Switching Power Supply when the 270V direct current is inputted is: Q2=K * 0.81I * 0.81I * R * T=0.656Q1. wherein K is the heat transformation ratio, and T is the unit interval.Learnt by result of calculation, rectifier diode R was constant when Switching Power Supply worked long hours, and the heat that produces when the direct current input service approximately is to produce about 1/2 of heat when exchanging input service.And in actual applications, according to the voltage-current characteristic of diode, the equivalent resistance R the when equivalent resistance of rectifier diode when direct current is inputted inputted much smaller than interchange.So, 1/2 the when caloric value that Switching Power Supply produces when real work is far inputted less than interchange.
Therefore, to existing Switching Power Supply, high voltage direct current power supply energy-conservation, raise the efficiency and improve aspect the security reliability really good than Alternating Current Power Supply.
 
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.Along with the development of power supply and power supply technique, novel high voltage direct current electric power system has appearred.The novel high-pressure DC power-supply system is compared with traditional UPS power supply, in security reliability, fractional energy savings, the aspects such as maintainability and construction cost have obvious advantage, and in data center, promoted the use of the high voltage direct current electric power system, substituted traditional UPS power supply.
But the continuous expansion along with the application of novel high-pressure DC power-supply system, power consumption equipment becomes increasingly complex, some new technical problems have been run into, the equipment that contains Switching Power Supply is supported the high voltage direct current power supply, but the equipment that is non-Switching Power Supply just can't use the high voltage direct current power supply, can only use Alternating Current Power Supply.So, even the high voltage direct current power supply has obvious advantage, can not be applied to all electricity consumption places, be difficult to bring into play the advantage of high voltage direct current power supply.
In a single day simultaneously high voltage direct current power supply power-off fault occurs, and in the situation of batteries power drain, power consumption equipment will be in " power failure " state.If other stand-by power supplies are arranged, just can cut fast quick change to stand-by power supply by switching device shifter and recover supply of electric power.
Reason in view of above-mentioned two aspects, the high voltage direct current power supply to be generalized to other applications, the advantage of performance high voltage direct current power supply, we need to develop a kind of novel high voltage direct current electric power system, be applicable to any electricity consumption occasion, satisfy the power reguirements of all power consumption equipments.This high-voltage direct current provides the galvanic while, again can the output AC electricity.Simultaneously high voltage direct current and alternating current be as mutually redundant power supply,
Further improved the reliability of system power supply.
Summary of the invention
Purpose of the present invention has just provided a kind of novel high voltage direct current electric power system.The exportable direct current of this system can switch the output AC electricity again as required, can make the high voltage direct current power supply be applicable to the major applications field, has the characteristics such as obvious energy-saving effect, security reliability is high, maintenance is simple, cost of investment is low.
For achieving the above object, the present invention adopts following technical scheme: comprise high-voltage DC power supply, AC power for subsequent use and be used for will high-voltage DC power supply and the AC power for subsequent use interlocking alternating current-direct current of exporting to power consumption equipment after switching switch output unit.
High-voltage DC power supply output nominal voltage is 240V, and virtual voltage is 270V, and operating voltage range is 204V to 292V, and is adjustable continuously.
Further, described alternating current-direct current switch unit comprises direct-flow input end and ac input end, and direct-flow input end links to each other with the high voltage direct current source output terminal, and ac input end links to each other with ac power output for subsequent use; The output that alternating current-direct current switches output unit has one with the selector switch of interlock function, this alternating current-direct current switches output unit in the situation that the alternating current-direct current dual input, can output DC by switching device shifter for switch power supply equipment, for non-switch power supply equipment, can be by switching device shifter output AC electricity.Simultaneously, when high-voltage DC power supply breaks down, can export alternating current for subsequent use to power consumption equipment by switching device shifter.
Further, described high-voltage DC power supply comprises AC input cell, rectification module and batteries.
Wherein: 1) AC input cell, comprise for the manual/auto switching device shifter that switches two-way AC power input (civil power and generator) and exchange monitoring means, the input of two-way AC power is linked to each other with the input of rectification module; 2) rectification module is used for providing high-voltage DC power supply, the output of rectification module to tell two-way in parallel, and one the tunnel connects the direct-flow input end that alternating current-direct current switches output unit, and another road connects batteries; 3) batteries is used for switching output unit by alternating current-direct current when rectification module is not worked and powers to power consumption equipment.
Further, described interchange monitoring means is used for the measurement of the signal of telecommunication of two-way input and ac bus, can also send according to the two-way input state control signal of input switching device shifter.
Exchange monitoring means and comprise the testing circuit that detects CPU, display interface and be used for measuring three-phase voltage, electric current and frequency.The output of described each testing circuit all is connected with the input that detects CPU.The signals of telecommunication such as voltage, electric current and frequency of measuring all can be presented at display interface, can send sound and light alarm signal and control signal simultaneously.
Further, rectification module is used for AC rectification is become direct current, and the voltage of output is that 204V to 292V is adjustable continuously.Rectification module can also charge a battery or discharge; Rectification module has flow equalizing function, has sleep mode under the cooperation of supervisory control system.
Rectification module comprises at least one rectification unit, and each rectification unit comprises main circuit, control circuit and auxiliary power circuit three parts.
Main circuit comprises lightning protection unit, EMC/EMI circuit, ac filter circuit, power conversion circuit, rectification circuit, DC-DC transfer circuit, DC filtering output circuit.The three-phase alternating current input is carried out ac filter behind lightning protection unit and EMC/EMI circuit; And then rectification output behind power conversion circuit; Output to DC-DC transfer circuit, required direct current is exported in last filtering.
Control circuit comprises input overvoltage/undervoltage protected location, current-limiting protection circuit, output overvoltage protection circuit, short-circuit protection circuit, voltage stabilizing loop, sample circuit, PFC unit, PMW control unit.Wherein the PMW control unit is collected the signal of input overvoltage/undervoltage protected location, current-limiting protection circuit, output overvoltage protection circuit, short-circuit protection circuit, voltage stabilizing loop, is aggregated in the power conversion circuit.The voltage stabilizing loop is Information Monitoring from sample circuit.The all Information Monitorings in the DC filtering output circuit from main circuit of sample circuit, short-circuit protection circuit, output overvoltage protection circuit, current-limiting protection circuit.The corresponding information of ac filter circuit is transported to respectively in input overvoltage/undervoltage protected location and the PFC unit in the main circuit, and the information of inputting simultaneously in the overvoltage/undervoltage protected location also is transported in the PFC unit.
Auxiliary power circuit is to provide necessary power supply for control circuit.
Further, described batteries comprises battery management unit and at least one group storage battery.Batteries directly is connected with the batteries link of dc bus as the non-firm power of high-voltage DC power supply, is used for when rectification module can't be worked to power consumption equipment continued power power;
Batteries need not dc inverter is become alternating current when two-way exchanges that input has a power failure or rectification module breaks down, and directly continues to provide electric power to electric equipment.
Battery management unit comprises processor, tension measuring circuit and temperature sensing circuit, and the processor input links to each other with the output of tension measuring circuit, temperature sensing circuit respectively, the voltage of the every group storage battery of Real-time Collection and temperature.
Further, AC power for subsequent use is as the stand-by power supply of high voltage direct current electric power system, to power consumption equipment output AC electricity.This AC power for subsequent use can be civil power or UPS, and its output links to each other with the input of alternating current-direct current switch unit.
AC power for subsequent use also comprises be used to the interchange monitoring means of measuring AC power input state for subsequent use.Exchange monitoring means and comprise detection CPU, alternating current voltage measuring circuit and ac current measurement circuit, the output of alternating current voltage measuring circuit and ac current measurement circuit all links to each other with detection CPU input.
 
Alternating current-direct current switches output unit and comprises that also break-make exchanges the miniature circuit breaker of the dc circuit breaker of the AC circuit breaker of input, the input of break-make direct current, break-make output and the distribution detecting unit that the monitoring AC/DC is switched the output unit operating state, and miniature circuit breaker has mechanical interlock; The distribution detecting unit comprises tension measuring circuit, current measurement circuit and insulation detecting circuit.
The measuring junction of tension measuring circuit, the measuring junction of current measurement circuit all link to each other with the output of alternating current-direct current switching output unit; The output that alternating current-direct current switches output unit is provided with leakage current sensor, and the test side of described insulation detecting circuit links to each other with the leakage current sensor output that alternating current-direct current switches in the output unit output.
Insulation detecting circuit also comprises an insulation measurement processor, leakage current sensor is a soft magnet core, insulation measurement processor input links to each other with the output of leakage current sensor, when alternating current-direct current switched any utmost point generation earth fault of output unit output, the insulation information that in time will produce was sent to supervisory control system.
Further, native system also comprises supervisory control system, supervisory control system is connected with interchange monitoring means, rectification module, battery management unit, interchange monitoring means for subsequent use and the communication of distribution detecting unit respectively, reads and pass down high voltage direct current electric power system all operational data information and control command.
Supervisory control system comprises display module and system operational management unit, and system's operational management unit output links to each other with the display module input.Display module is used for all data messages of display system, obtains simultaneously the user to the input of system's operation.
The most obvious feature of the present invention is: the invention provides a kind of high-voltage DC power supply and AC power dual input for subsequent use, the output high voltage direct current, can switch output unit output AC electricity by alternating current-direct current again, can make this high voltage direct current electric power system be applicable to most application.High-voltage DC power supply in this system and AC power for subsequent use have mutually redundant effect simultaneously.When DC power supply breaks down and when having a power failure, can switch to fast alternating current for subsequent use by the alternating current-direct current switch unit, continue to power devices.The user does not need existing power consumption equipment is carried out any transformation yet, can use direct current supply, greatly improves the security reliability of power supply, reduces simultaneously energy consumption.
Description of drawings
Fig. 1 is the schematic diagram of electric power system of the present invention;
Fig. 2 is the overall structure block diagram of electric power system of the present invention;
Fig. 3 is AC input cell schematic diagram in the electric power system of the present invention;
Fig. 4 is rectification module structured flowchart in the electric power system of the present invention;
Fig. 5 is that alternating current-direct current switches the output unit schematic diagram in the electric power 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 high voltage direct current electric power system, comprise high-voltage DC power supply, AC power for subsequent use and be used for will high-voltage DC power supply and the AC power for subsequent use interlocking alternating current-direct current of exporting to power consumption equipment after switching switch output unit.
High-voltage DC power supply output nominal voltage is 240V, and virtual voltage is 270V, and operating voltage range is 204V to 292V, and is adjustable continuously.
With reference to Fig. 5, the alternating current-direct current switch unit comprises direct-flow input end and ac input end, and direct-flow input end links to each other with the high voltage direct current source output terminal, and ac input end links to each other with ac power output for subsequent use; The output that alternating current-direct current switches output unit has one with the selector switch of interlock function, this alternating current-direct current switches output unit in the situation that the alternating current-direct current dual input, can output DC by switching device shifter for switch power supply equipment, for non-switch power supply equipment, can be by switching device shifter output AC electricity.Simultaneously, when high-voltage DC power supply breaks down, can export alternating current for subsequent use to power consumption equipment by switching device shifter.
With reference to Fig. 2, high-voltage DC power supply comprises AC input cell, rectification module and batteries.
Wherein: 1) AC input cell, comprise for the manual/auto switching device shifter (QA1, QA2) that switches two-way AC power input (civil power and generator) and exchange monitoring means, the input of two-way AC power is linked to each other with the input of rectification module; 2) rectification module is used for providing high-voltage DC power supply, the output of rectification module to tell two-way in parallel, and one the tunnel connects the direct-flow input end that alternating current-direct current switches output unit, and another road connects batteries; 3) batteries is used for switching output unit by alternating current-direct current when rectification module is not worked and powers to power consumption equipment.
With reference to Fig. 3, exchange the measurement that monitoring means is used for the signal of telecommunication of two-way input and ac bus, can also send according to the two-way input state control signal of input switching device shifter.
Exchange monitoring means and comprise the testing circuit that detects CPU, display interface and be used for measuring three-phase voltage, electric current and frequency.The output of described each testing circuit all is connected with the input that detects CPU.The signals of telecommunication such as voltage, electric current and frequency of measuring all can be presented at display interface, can send sound and light alarm signal and control signal simultaneously.Exchange monitoring means and also comprise little circuit breaker Q FV1 of lightning arrester FV1, break-make lightning arrester and little circuit breaker Q PR1, the QPR2 of each rectification unit of break-make .... QPRN.
With reference to Fig. 4, rectification module is used for AC rectification is become direct current, and the voltage of output is that 204V to 292V is adjustable continuously.Rectification module can also charge a battery or discharge; Rectification module has flow equalizing function, has sleep mode under the cooperation of supervisory control system.
Rectification module comprises at least one rectification unit, and each rectification unit comprises main circuit, control circuit and auxiliary power circuit three parts.
Main circuit comprises lightning protection unit, EMC/EMI circuit, ac filter circuit, power conversion circuit, rectification circuit, DC-DC transfer circuit, DC filtering output circuit.The three-phase alternating current input is carried out ac filter behind lightning protection unit and EMC/EMI circuit; And then rectification output behind power conversion circuit; Output to DC-DC transfer circuit, required direct current is exported in last filtering.
Control circuit comprises input overvoltage/undervoltage protected location, current-limiting protection circuit, output overvoltage protection circuit, short-circuit protection circuit, voltage stabilizing loop, sample circuit, PFC unit, PMW control unit.Wherein the PMW control unit is collected the signal of input overvoltage/undervoltage protected location, current-limiting protection circuit, output overvoltage protection circuit, short-circuit protection circuit, voltage stabilizing loop, is aggregated in the power conversion circuit.The voltage stabilizing loop is Information Monitoring from sample circuit.The all Information Monitorings in the DC filtering output circuit from main circuit of sample circuit, short-circuit protection circuit, output overvoltage protection circuit, current-limiting protection circuit.The corresponding information of ac filter circuit is transported to respectively in input overvoltage/undervoltage protected location and the PFC unit in the main circuit, and the information of inputting simultaneously in the overvoltage/undervoltage protected location also is transported in the PFC unit.
Auxiliary power circuit is to provide necessary power supply for control circuit.
As can be seen from Figure 2, batteries comprises battery management unit and at least one group storage battery.Batteries directly is connected with the batteries link of dc bus as the non-firm power of high-voltage DC power supply, is used for when rectification module can't be worked to power consumption equipment continued power power;
Batteries need not dc inverter is become alternating current when two-way exchanges that input has a power failure or rectification module breaks down, and directly continues to provide electric power to electric equipment.
Battery management unit comprises processor, tension measuring circuit and temperature sensing circuit, and the processor input links to each other with the output of tension measuring circuit, temperature sensing circuit respectively, the voltage of the every group storage battery of Real-time Collection and temperature.
AC power for subsequent use is as the stand-by power supply of high voltage direct current electric power system, to power consumption equipment output AC electricity.This AC power for subsequent use can be civil power or UPS, and its output links to each other with the input of alternating current-direct current switch unit.
AC power for subsequent use also comprises be used to the interchange monitoring means of measuring AC power input state for subsequent use.Exchange monitoring means and comprise detection CPU, alternating current voltage measuring circuit and ac current measurement circuit, the output of alternating current voltage measuring circuit and ac current measurement circuit all links to each other with detection CPU input.
Alternating current-direct current switches output unit and comprises that also break-make exchanges the miniature circuit breaker of the dc circuit breaker of the AC circuit breaker of input, the input of break-make direct current, break-make output and the distribution detecting unit that the monitoring AC/DC is switched the output unit operating state, and miniature circuit breaker has mechanical interlock; The distribution detecting unit comprises tension measuring circuit, current measurement circuit and insulation detecting circuit.
The measuring junction of tension measuring circuit, the measuring junction of current measurement circuit all link to each other with the output of alternating current-direct current switching output unit; The output that alternating current-direct current switches output unit is provided with leakage current sensor, and the test side of described insulation detecting circuit links to each other with the leakage current sensor output that alternating current-direct current switches in the output unit output.
Insulation detecting circuit also comprises an insulation measurement processor, leakage current sensor is a soft magnet core, insulation measurement processor input links to each other with the output of leakage current sensor, when alternating current-direct current switched any utmost point generation earth fault of output unit output, the insulation information that in time will produce was sent to supervisory control system.
From Fig. 2, it can also be seen that, in the present embodiment, this electric power system also comprises supervisory control system, supervisory control system is connected with interchange monitoring means, rectification module, battery management unit, interchange monitoring means for subsequent use and the communication of distribution detecting unit respectively, reads and pass down high voltage direct current electric power system all operational data information and control command.
Supervisory control system comprises display module and system operational management unit, and system's operational management unit output links to each other with the display module input.Display module is used for all data messages of display system, obtains simultaneously the user to the input of system's operation.

Claims (10)

1. high voltage direct current electric power system is characterized in that: comprise high-voltage DC power supply, AC power for subsequent use and be used for will high-voltage DC power supply and the AC power for subsequent use interlocking alternating current-direct current of exporting to power consumption equipment after switching switch output unit.
2. high voltage direct current electric power system according to claim 1, it is characterized in that: described alternating current-direct current switch unit comprises direct-flow input end and ac input end, direct-flow input end links to each other with the high voltage direct current source output terminal, and ac input end links to each other with ac power output for subsequent use; The output that alternating current-direct current switches output unit has one with the selector switch of interlock function.
3. high voltage direct current electric power system according to claim 1, it is characterized in that: described high-voltage DC power supply comprises AC input cell, rectification module and batteries; Wherein: 1) AC input cell, comprise for the manual/auto switching device shifter that switches the input of two-way AC power and exchange monitoring means, the input of two-way AC power is linked to each other with the input of rectification module; 2) rectification module is used for providing high-voltage DC power supply, the output of rectification module to tell two-way in parallel, and one the tunnel connects the direct-flow input end that alternating current-direct current switches output unit, and another road connects batteries; 3) batteries is used for switching output unit by alternating current-direct current when rectification module is not worked and powers to power consumption equipment.
4. high voltage direct current electric power system according to claim 1 is characterized in that: described interchange monitoring means comprises the testing circuit that detects CPU, display interface and be used for measuring three-phase voltage, electric current and frequency; The output of described each testing circuit all is connected with the input that detects CPU.
5. high voltage direct current electric power system according to claim 1, it is characterized in that: described rectification module comprises at least one rectification unit, each rectification unit comprises main circuit, control circuit and auxiliary power circuit three parts; Main circuit comprises lightning protection unit, EMC/EMI circuit, ac filter circuit, power conversion circuit, rectification circuit, DC-DC transfer circuit, DC filtering output circuit; The three-phase alternating current input is carried out ac filter behind lightning protection unit and EMC/EMI circuit; And then rectification output behind power conversion circuit; Output to DC-DC transfer circuit, required direct current is exported in last filtering; Control circuit comprises input overvoltage/undervoltage protected location, current-limiting protection circuit, output overvoltage protection circuit, short-circuit protection circuit, voltage stabilizing loop, sample circuit, PFC unit, PMW control unit; Wherein the PMW control unit is collected the signal of input overvoltage/undervoltage protected location, current-limiting protection circuit, output overvoltage protection circuit, short-circuit protection circuit, voltage stabilizing loop, is aggregated in the power conversion circuit; The voltage stabilizing loop is Information Monitoring from sample circuit; The all Information Monitorings in the DC filtering output circuit from main circuit of sample circuit, short-circuit protection circuit, output overvoltage protection circuit, current-limiting protection circuit; The corresponding information of ac filter circuit is transported to respectively in input overvoltage/undervoltage protected location and the PFC unit in the main circuit, and the information of inputting simultaneously in the overvoltage/undervoltage protected location also is transported in the PFC unit; Auxiliary power circuit is to provide necessary power supply for control circuit.
6. high voltage direct current electric power system according to claim 1, it is characterized in that: described batteries comprises battery management unit and at least one group storage battery; Battery management unit comprises processor, tension measuring circuit and temperature sensing circuit, and the processor input links to each other with the output of tension measuring circuit, temperature sensing circuit respectively.
7. high voltage direct current electric power system according to claim 1, it is characterized in that: described AC power for subsequent use also comprises be used to the interchange monitoring means of measuring AC power input state for subsequent use, exchange monitoring means and comprise detection CPU, alternating current voltage measuring circuit and ac current measurement circuit, the output of alternating current voltage measuring circuit and ac current measurement circuit all links to each other with detection CPU input.
8. high voltage direct current electric power system according to claim 1, it is characterized in that: described alternating current-direct current switches output unit and comprises that also break-make exchanges the miniature circuit breaker of the dc circuit breaker of the AC circuit breaker of input, the input of break-make direct current, break-make output and the distribution detecting unit that the monitoring AC/DC is switched the output unit operating state, and miniature circuit breaker has mechanical interlock; The distribution detecting unit comprises tension measuring circuit, current measurement circuit and insulation detecting circuit.
9. high voltage direct current electric power system according to claim 8 is characterized in that: the measuring junction of described tension measuring circuit, the measuring junction of current measurement circuit all link to each other with the output that alternating current-direct current switches output unit; The output that alternating current-direct current switches output unit is provided with leakage current sensor, and the test side of described insulation detecting circuit links to each other with the leakage current sensor output that alternating current-direct current switches in the output unit output; Insulation detecting circuit also comprises an insulation measurement processor, leakage current sensor is a soft magnet core, insulation measurement processor input links to each other with the output of leakage current sensor, when alternating current-direct current switched any utmost point generation earth fault of output unit output, the insulation information that in time will produce was sent to supervisory control system.
10. high voltage direct current electric power system according to claim 1, it is characterized in that: also comprise supervisory control system, supervisory control system is connected with interchange monitoring means, rectification module, battery management unit, interchange monitoring means for subsequent use and the communication of distribution detecting unit respectively; Supervisory control system comprises display module and system operational management unit, and system's operational management unit output links to each other with the display module input.
CN2013100045506A 2013-01-06 2013-01-06 High voltage direct current power supply system Pending CN103066684A (en)

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