CN104701836A - Intelligent direct-current micro-grid power supply system - Google Patents

Intelligent direct-current micro-grid power supply system Download PDF

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Publication number
CN104701836A
CN104701836A CN201510141926.7A CN201510141926A CN104701836A CN 104701836 A CN104701836 A CN 104701836A CN 201510141926 A CN201510141926 A CN 201510141926A CN 104701836 A CN104701836 A CN 104701836A
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China
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voltage
phase
current
circuit
output
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CN201510141926.7A
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Chinese (zh)
Inventor
蒋勇斌
王跃
刘永慧
李卓强
王华佳
雷万钧
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Xian Jiaotong University
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Xian Jiaotong University
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Priority to CN201510141926.7A priority Critical patent/CN104701836A/en
Publication of CN104701836A publication Critical patent/CN104701836A/en
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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00Circuit arrangements for dc mains or dc distribution networks
    • H02J1/10Parallel operation of dc sources
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00Details of apparatus for conversion
    • H02M1/42Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • H02M1/4208Arrangements for improving power factor of AC input
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M7/219Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
    • 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
    • Y02B70/10Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

The invention discloses an intelligent direct-current micro-grid power supply system which comprises a three-phase alternating-current power grid, a high-power factor rectifier, a first isolated bidirectional direct-current transformation device, a second isolated bidirectional direct-current transformation device, a first direct-current bus, a second direct-current bus, a micro-grid power dispatching management system, a first control circuit, a second control circuit, a third control circuit, a first sampling conditioning circuit for acquiring direct-current-side voltage information, three-phase inlet wire current information and three-phase inlet wire voltage information of the three-phase alternating-current power grid, a second sampling conditioning circuit for acquiring current and voltage information on the high-voltage side and current and voltage information on the low-voltage side in the first isolated bidirectional direct-current transformation device and a second sampling conditioning circuit for acquiring current and voltage information on the high-voltage side and current and voltage information on the low-voltage side in the second isolated bidirectional direct-current transformation device. By means of a full-control rectification method, bidirectional energy flowing is achieved, and symmetry of three-phase load is ensured.

Description

A kind of direct-current grid intelligent power supply system
Technical field
The invention belongs to new energy field, relate to a kind of electric power system, be specifically related to a kind of direct-current grid intelligent power supply system.
Background technology
Along with the socioeconomic development in the whole world, the demand of people to the energy is growing, and energy-saving and environmental protection, sustainable development become current era theme.The development and utilization of new forms of energy (wind energy, solar energy etc.) day by day becomes a kind of effective way meeting people's load growth demand, reduce environmental pollution, improve comprehensive utilization rate of energy source and power supply reliability.
Because new forms of energy have the features such as poor stability, widely distributed, Systematical control is comparatively complicated, for bulk power grid, distributed generation system is a uncontrollable source, and a large amount of distributed power source access bulk power grid will inevitably have an impact to bulk power grid stability.When bulk power grid breaks down, it is out of service that distributed power grid needs to disconnect electrical network immediately, and this creates very large restriction to the utilance of new forms of energy.
Along with digitized universal, increasing civil electric appliance digitlization, thing followed electric equipment adopts DC power supply mostly.For meeting DC load need for electricity and facilitating distributed DC power to access main electrical network, direct-current grid is arisen at the historic moment.Be different from interchange micro-capacitance sensor, the busbar voltage of direct-current grid is direct current, need not the phase place of control voltage and frequency, and therefore, reliability and the controllability of micro-capacitance sensor are greatly improved.Direct-current grid is effectively supplementary as the one of traditional electrical network, not only can improve the quality of power supply, meets the diversified demand of user, and can be in case of emergency that electrical network provides support as stand-by power supply.Existing direct current micro grid adopts the method for uncontrollable rectifier, the flowing that energy is two-way cannot be realized, power quality problem cannot be solved, and the volume of the Industrial Frequency Transformer be connected with bulk power grid is larger, cost is high, floor space is large, and effectively can not guarantee the symmetry of electrical network threephase load, makes the stability step-down of electrical network.
Summary of the invention
The object of the invention is to the shortcoming overcoming above-mentioned prior art, provide a kind of direct-current grid intelligent power supply system, this system can realize two-way flow and the unit power factor rectifier of energy, and can guarantee the symmetry of electrical network threephase load, volume is little simultaneously, and cost is low.
For achieving the above object, direct-current grid intelligent power supply system of the present invention comprises three-phase alternating current electrical network, high-power factory rectifier, first isolation type bidirectional DC converter, second isolation type bidirectional DC converter, first DC bus, second DC bus, microgrid energy dispatching management information system, first control circuit, second control circuit, 3rd control circuit, for gathering the DC voltage information of three-phase alternating current electrical network, first sampling modulate circuit of three-phase inlet wire current information and three-phase primary voltage information, for the electric current of the electric current and information of voltage and low-pressure side that gather the first isolation type bidirectional DC converter mesohigh side and the second sampling modulate circuit of information of voltage, and for the electric current of the electric current and information of voltage and low-pressure side that gather the second isolation type bidirectional DC converter mesohigh side and the 3rd sampling modulate circuit of information of voltage,
Described three-phase alternating current electrical network is connected with the input of high-power factory rectifier, and the output of high-power factory rectifier is connected with the first DC bus and the second DC bus respectively by the first isolation type bidirectional DC converter and the second isolation type bidirectional DC converter;
Described microgrid energy dispatching management information system and first control circuit, second control circuit and the 3rd control circuit are connected, the first sampling output of modulate circuit is connected with the input of first control circuit, the output of first control circuit is connected with the control end of high-power factory rectifier, the second sampling output of modulate circuit is connected with the input of second control circuit, the output of second control circuit is connected with the control end of the first isolation type bidirectional DC converter, the output of the 3rd sampling modulate circuit is connected with the input of the 3rd control circuit, the output of the 3rd control circuit is connected with the control end of the second isolation type bidirectional DC converter.
The input of described three-phase alternating current electrical network and high-power factory rectifier protects by first and soft opening device is connected.
The output of described high-power factory rectifier is respectively by the second protection and soft opening device and the 3rd protects and soft opening device is connected with the first isolation type bidirectional DC converter and the second isolation type bidirectional DC converter.
Described first control circuit comprises the first dsp chip and the first drive circuit, the output of the first sampling modulate circuit is connected with the input of the first dsp chip, and the output of the first dsp chip is connected with the control end of high-power factory rectifier by the first drive circuit.
Described second control circuit comprises the second dsp chip and the second drive circuit, the output of the second sampling modulate circuit is connected with the input of the second dsp chip, and the output of the second dsp chip is connected by the control end of the second drive circuit with the first isolation type bidirectional DC converter.
Described 3rd control circuit comprises the 3rd dsp chip and the 3rd drive circuit, the output of the 3rd sampling modulate circuit is connected with the input of the 3rd dsp chip, and the output of the 3rd dsp chip is connected by the control end of the 3rd drive circuit with the second isolation type bidirectional DC converter.
Described high-power factory rectifier comprises Three-phase electric-wave filter and three-phase fully-controlled bridge circuit; first protection and soft opening device are connected with the input of Three-phase electric-wave filter; the output of Three-phase electric-wave filter is connected with the input of three-phase fully-controlled bridge circuit; the output of three-phase fully-controlled bridge circuit is connected with the first isolation type bidirectional DC converter and the second isolation type bidirectional DC converter respectively; the first sampling input of modulate circuit is connected with the output of Three-phase electric-wave filter, and the output of the first drive circuit is connected with the control end of three-phase fully-controlled bridge circuit.
Described microgrid energy dispatching management information system comprises handheld-type intelligent terminal, ARM control board and host computer, and the control end of the control end of ARM control board and first control circuit, the control end of second control circuit, the 3rd control circuit, host computer and handheld-type intelligent terminal are connected.
Voltage on described first DC bus is 48V, and the voltage on the second DC bus is 400V.
The DC voltage information of three-phase alternating current electrical network is gathered by the first sampling modulate circuit, three-phase inlet wire current information and three-phase primary voltage information, first dsp chip is to the DC voltage information of three-phase alternating current electrical network, three-phase inlet wire current information and three-phase primary voltage information carry out nursing one's health and AD conversion, and the voltage-phase of three-phase alternating current electrical network is first locked by phase-locked loop, then with the voltage-phase of described three-phase alternating current electrical network for benchmark carries out 3/2 conversion and dq rotation transformation successively, first outer voltage PI computing is carried out under dq coordinate system, obtain current inner loop set-point, described current inner loop set-point carry out current inner loop PI computing obtain high-power factory rectifier (A) dq coordinate be under the given magnitude of voltage of port, again by described high-power factory rectifier (A) dq coordinate be under the given magnitude of voltage of port carry out dq inverse transformation and 3/2 inverse transformation successively, obtain the given magnitude of voltage of abc coordinate system lower port, then SPWM modulation is carried out to the given magnitude of voltage of abc coordinate system lower port, and pass through ePWM CMOS macro cell 6 tunnel first pulse signal of the first dsp chip, described first drive circuit amplifies 6 tunnel first pulse signals, and the switching tube of high-power factory rectifiers is driven by 6 tunnel first pulse signals after amplification, make three-phase inlet wire current i a, i b, i csineization, and with the voltage u of three-phase alternating current electrical network a, u b, u csame-phase, the DC voltage V that high-power factory rectifier is exported dckeep constant and unity power factor operation.
The present invention has following beneficial effect:
Direct-current grid intelligent power supply system of the present invention operationally, by high-power factory rectifier, the voltage commutation of three-phase alternating current electrical network is become direct voltage, not only can realize the energy transferring of AC-to DC, direct current can also be realized be fed to the energy of AC network, meet the two-way flow of energy; The DC voltage information of three-phase alternating current electrical network, three-phase inlet wire current information and three-phase primary voltage information is gathered by the first sampling modulate circuit, three-phase inlet wire current is controlled to three phase sine electric current according to the DC voltage information of described three-phase alternating current electrical network, three-phase inlet wire current information and three-phase primary voltage information by first control circuit, and with the voltage in phase of three-phase alternating current electrical network, reach the object improving the quality of power supply, without the need to additional configuration utility power quality control equipment, thus save equipment investment cost; Simultaneously be made as symmetrical component because the input three-phase current of high-power factory rectifier is controlled, ensure that the symmetry of electrical network three-phase load, reduce the disequilibrium of electrical network, be conducive to power system safety and stability and run.In addition, first isolation type bidirectional DC converter and the second isolation type bidirectional DC converter not only can realize the voltage transformation of DC-to-DC, and the two-way flow of energy can be realized, realize the electrical isolation of bulk power grid and DC bus simultaneously, and when transmitting identical power, volume is less, quality is lighter, cost is lower, greatly reduces system cost and system footprint area, improves systematic economy benefit.
In addition, the voltage on the first DC bus is 48V, and the voltage on the second DC bus is 400V, and the first DC bus powers, as equipment such as charger for mobile phone, computer charger, electric lights to low power electric appliance equipment; Second DC bus power, as powerful devices such as building elevator, large power air-conditioned, HVACs to high-power electric appliance equipment.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of first control circuit in the present invention, second control circuit and the 3rd control circuit;
Fig. 3 is the structural representation of the first protection and soft opening device 01 in the present invention;
Fig. 4 is the structural representation of high-power factory rectifier control circuit D in the present invention;
The structural representation of the second protection and soft opening device 04 in Fig. 5 (a) the present invention;
The structural representation of the 3rd protection and soft opening device 08 in Fig. 5 (b) the present invention;
Fig. 6 is the structural representation of the first isolation type bidirectional DC converter B in the present invention;
Fig. 7 is the structural representation of the second isolation type bidirectional DC converter C in the present invention.
Wherein, A is high-power factory rectifier, B is the first isolation type bidirectional DC converter, C is the second isolation type bidirectional DC converter, D is high-power factory rectifier control circuit, E is the first isolation type bidirectional DC converter control circuit, F is the second isolation type bidirectional DC converter control circuit, G is microgrid energy dispatching management information system, 01 is the first protection and soft opening device, 02 is Three-phase electric-wave filter, 03 is three-phase fully-controlled bridge circuit, 04 is the second protection and soft opening device, 05 is the first DC filtering inductance, 06 is the first bidirectional isolation direct-current converter, 07 is the first DC bus, 08 is the 3rd protection and soft opening device, 09 is the second DC filtering inductance, 10 second isolation type bidirectional DC converters, 11 is the second DC bus, 001 is the first drive circuit, 002 is the first dsp chip, 003 is the first sampling modulate circuit, 004 is the second drive circuit, 005 is the second dsp chip, 006 is the second sampling modulate circuit, 007 is the 3rd drive circuit, 008 is the 3rd dsp chip, 009 is the 3rd sampling modulate circuit, 010 is ARM control board, 011 is handheld-type intelligent terminal, 012 is host computer, 01a is overcurrent protective device, 01b is soft opening device, 03b is DC bus capacitor, 04a is the first DC circuit breaker, 04b is the first fuse, 06a is the first high-pressure side filter capacitor, 06b is the first single-phase fully controlled bridge in high-pressure side, 06c is the first high frequency transformer, 06d is the single-phase fully controlled bridge of the first low-pressure side, 06e is the first low-pressure side filter capacitor, 08a is the second DC circuit breaker, 08b is the second fuse, 10a is the second high-pressure side filter capacitor, 10b is the second single-phase fully controlled bridge in high-pressure side, 10c is the second high frequency transformer, 10d is the single-phase fully controlled bridge of the second low-pressure side, 10e is the second low-pressure side filter capacitor.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
With reference to figure 1 and Fig. 2, direct-current grid intelligent power supply system of the present invention comprises three-phase alternating current electrical network, high-power factory rectifier A, first isolation type bidirectional DC converter B, second isolation type bidirectional DC converter C, first DC bus 07, second DC bus 11, microgrid energy dispatching management information system G, first control circuit, second control circuit, 3rd control circuit, for gathering the DC voltage information of three-phase alternating current electrical network, first sampling modulate circuit 003 of three-phase inlet wire current information and three-phase primary voltage information, for the electric current of the electric current and information of voltage and low-pressure side that gather the first isolation type bidirectional DC converter B mesohigh side and the second sampling modulate circuit 006 of information of voltage, and for the electric current of the electric current and information of voltage and low-pressure side that gather the second isolation type bidirectional DC converter C mesohigh side and the 3rd sampling modulate circuit 009 of information of voltage, three-phase alternating current electrical network is connected with the input of high-power factory rectifier A, and the output of high-power factory rectifier A is connected with the first DC bus 07 and the second DC bus 11 respectively by the first isolation type bidirectional DC converter B and the second isolation type bidirectional DC converter C, microgrid energy dispatching management information system G and first control circuit, second control circuit and the 3rd control circuit are connected, the first sampling output of modulate circuit 003 is connected with the input of first control circuit, the output of first control circuit is connected with the control end of high-power factory rectifier A, the second sampling output of modulate circuit 006 is connected with the input of second control circuit, the output of second control circuit is connected with the control end of the first isolation type bidirectional DC converter B, the output of the 3rd sampling modulate circuit 009 is connected with the input of the 3rd control circuit, the output of the 3rd control circuit is connected with the control end of the second isolation type bidirectional DC converter C.
It should be noted that, the input of three-phase alternating current electrical network and high-power factory rectifier A protects by first and soft opening device 01 is connected, the output of high-power factory rectifier A is respectively by the second protection and soft opening device 04 and the 3rd protects and soft opening device 08 is connected with the first isolation type bidirectional DC converter B and the second isolation type bidirectional DC converter C, first control circuit comprises the first dsp chip 002 and the first drive circuit 001, the output of the first sampling modulate circuit 003 is connected with the input of the first dsp chip 002, and the output of the first dsp chip 002 is connected with the control end of high-power factory rectifier A by the first drive circuit 001, second control circuit comprises the second dsp chip 005 and the second drive circuit 004, the output of the second sampling modulate circuit 006 is connected with the input of the second dsp chip 005, and the output of the second dsp chip 005 is connected by the control end of the second drive circuit 004 with the first isolation type bidirectional DC converter B, 3rd control circuit comprises the 3rd dsp chip 008 and the 3rd drive circuit 007, the output of the 3rd sampling modulate circuit 009 is connected with the input of the 3rd dsp chip 008, and the output of the 3rd dsp chip 008 is connected by the control end of the 3rd drive circuit 007 with the second isolation type bidirectional DC converter C, high-power factory rectifier A comprises Three-phase electric-wave filter 02 and three-phase fully-controlled bridge circuit 03, first protection and soft opening device 01 are connected with the input of Three-phase electric-wave filter 02, the output of Three-phase electric-wave filter 02 is connected with the input of three-phase fully-controlled bridge circuit 03, the output of three-phase fully-controlled bridge circuit 03 is connected with the first isolation type bidirectional DC converter B and the second isolation type bidirectional DC converter C respectively, the input of the first sampling modulate circuit 003 is connected with the output of Three-phase electric-wave filter 02, the output of the first drive circuit 001 is connected with the control end of three-phase fully-controlled bridge circuit 03, microgrid energy dispatching management information system G comprises the control end of handheld-type intelligent terminal 011, ARM control board 010 and host computer 012, ARM control board 010 and first control circuit, the control end of second control circuit, the control end of the 3rd control circuit, host computer 012 and handheld-type intelligent terminal 011 and is connected, voltage on first DC bus 07 is 48V, and the voltage on the second DC bus 11 is 400V.
The DC voltage information of three-phase alternating current electrical network is gathered by the first sampling modulate circuit 003, three-phase inlet wire current information and three-phase primary voltage information, the DC voltage information of the first dsp chip 002 pair of three-phase alternating current electrical network, three-phase inlet wire current information and three-phase primary voltage information carry out nursing one's health and AD conversion, and the voltage-phase of three-phase alternating current electrical network is first locked by phase-locked loop, then with the voltage-phase of described three-phase alternating current electrical network for benchmark carries out 3/2 conversion and dq rotation transformation successively, first outer voltage PI computing is carried out under dq coordinate system, obtain current inner loop set-point, described current inner loop set-point carry out current inner loop PI computing obtain high-power factory rectifier (A) dq coordinate be under the given magnitude of voltage of port, again by described high-power factory rectifier (A) dq coordinate be under the given magnitude of voltage of port carry out dq inverse transformation and 3/2 inverse transformation successively, obtain the given magnitude of voltage of abc coordinate system lower port, then SPWM modulation is carried out to the given magnitude of voltage of abc coordinate system lower port, and pass through ePWM CMOS macro cell 6 tunnel first pulse signal of the first dsp chip 002, described first drive circuit 001 amplifies 6 tunnel first pulse signals, and the switching tube of high-power factory rectifier A is driven by 6 tunnel first pulse signals after amplification, make three-phase inlet wire current i a, i b, i csineization, and with the voltage u of three-phase alternating current electrical network a, u b, u csame-phase, makes the DC voltage V that high-power factory rectifier A exports dckeep constant.
With reference to figure 3; described first protection and soft opening device 01; comprise overcurrent protective device 01a and soft opening device 01b; at powered on moment; first closed low capacity relay K M1 allows bulk power grid to late-class circuit capacitor charging; then whether Detection capacitance voltage arrives the value of setting, if disconnect KM1 after closing Large Copacity relay K M2 again when reaching set point, completion system is soft to be opened.
With reference to figure 4, described high-power factory rectifier A comprises Three-phase electric-wave filter 02, three-phase fully-controlled bridge circuit 03 and DC bus capacitor 03b, and Three-phase electric-wave filter 02 is the LCL filter adopted; The switching tube of three-phase fully-controlled bridge circuit 03 is IGBT or switch mosfet pipe; DC bus capacitor 03b is electrochemical capacitor;
Described high-power factory rectifier control circuit D comprises the first sampling modulate circuit 003, first dsp chip 002 and the first drive circuit 001, first, the DC voltage information of three-phase alternating current electrical network is gathered by the first sampling modulate circuit 003, three-phase inlet wire current information and three-phase primary voltage information, the DC voltage information of the first dsp chip 002 pair of three-phase alternating current electrical network, three-phase inlet wire current information and three-phase primary voltage information carry out nursing one's health and carry out AD conversion, and the voltage-phase of three-phase alternating current electrical network is first locked by phase-locked loop, then with the voltage-phase of described three-phase alternating current electrical network for benchmark carries out 3/2 conversion and dq rotation transformation successively, first outer voltage PI computing is carried out under dq coordinate system, obtain current inner loop set-point, described current inner loop set-point carry out current inner loop PI computing obtain high-power factory rectifier (A) dq coordinate be under the given magnitude of voltage of port, again by described high-power factory rectifier (A) dq coordinate be under the given magnitude of voltage of port carry out dq inverse transformation and 3/2 inverse transformation successively, then SPWM modulation is carried out to the given magnitude of voltage of abc coordinate system lower port, and pass through ePWM CMOS macro cell 6 tunnel first pulse signal of DSP, described first drive circuit 001 amplifies 6 tunnel first pulse signals, and the switching tube of high-power factory rectifier A is driven by 6 tunnel first pulse signals after amplification, make three-phase inlet wire current i a, i b, i csineization, and with the voltage u of three-phase alternating current electrical network a, u b, u csame-phase, reaches the object of High Power Factor, makes the DC voltage V that high-power factory rectifier A exports dckeep constant.
With reference to figure 5 (a); described first protection and soft opening device 01 comprise the first DC circuit breaker 04a and the first fuse 04b; first fuse 04b can not be excessive for limiting the first DC bus 07 output current; thus protection high-power factory rectifier A; whether the first DC circuit breaker 04a is connected with high-power factory rectifier A for controlling the first isolation type bidirectional DC converter B, thus controls the operation of low-voltage direct micro-capacitance sensor and grid-connect mode or island mode.
With reference to figure 6, described first isolation type bidirectional DC converter B comprises the first bidirectional isolation direct-current converter 06 and the first DC filtering inductance 05, first bidirectional isolation direct-current converter 06 comprises the first high-pressure side filter capacitor 06a, the first single-phase fully controlled bridge 06b in high-pressure side, first high-frequency inductor, first high frequency transformer 06c, the single-phase fully controlled bridge 06d of first low-pressure side and the first low-pressure side filter capacitor 06e, during work, first high-voltage dc voltage is first reverse into high-voltage alternating square-wave voltage by the first single-phase fully controlled bridge 06b in high-pressure side, by the first high frequency transformer 06c, high-voltage alternating square wave is transformed into low-voltage high-frequency square wave, then by the first low-pressure side single-phase fully controlled bridge 06d, low-voltage high-frequency square wave is rectified into direct current, realize the conversion of DC-to-DC, and the isolation of high voltage direct current and low-voltage direct can be realized.
Described first DC bus 07 for connecting low voltage equipment and low pressure energy storage and generating equipment, as electric automobile charging pile, various low pressure household electrical appliance, photovoltaic charged device, batteries to store energy device etc.
With reference to figure 5 (b); described protective device 08 comprises the second DC circuit breaker 08a and the second fuse 08b; second fuse 08b can not be excessive for limiting the second DC bus 11 output current; thus protection prime high-power factory rectifier A; whether the second DC circuit breaker 08a is used for the second control isolation type bidirectional DC converter C and is connected with high-power factory rectifier A, thus controls the operation of high voltage direct current micro-capacitance sensor and grid-connect mode or island mode.
With reference to figure 7, described second isolation type bidirectional DC converter C comprises the second DC filtering inductance 09, second high-pressure side filter capacitor 10a, the second single-phase fully controlled bridge 10b in high-pressure side, second high-frequency inductor, second high frequency transformer 10c, the single-phase fully controlled bridge 10d of second low-pressure side and the second low-pressure side filter capacitor 10e, first, high-voltage dc voltage is first reverse into high-voltage alternating square-wave voltage by the second single-phase fully controlled bridge 10b in high-pressure side, by the second high frequency transformer 10c, high-voltage alternating square wave is transformed into low-voltage high-frequency square wave, then by the second low-pressure side single-phase fully controlled bridge 10d, low-voltage high-frequency square wave is rectified into direct current, realize the conversion of DC-to-DC, and the isolation of high voltage direct current and low-voltage direct can be realized.
Described second DC bus 11 is used for connecting high voltage electric equipment and high-voltage energy storage and generating equipment, as building elevator, large-scale refrigeration plant, high-power illumination equipment etc.
Described first isolation type bidirectional DC converter control circuit E comprises the second dsp chip 005, second drive circuit 004 and the second sampling modulate circuit 006.First the electric current of the first isolation type bidirectional DC converter B mesohigh side and the electric current of information of voltage and low-pressure side and information of voltage is gathered by the second sampling modulate circuit 006, the electric current of the first isolation type bidirectional DC converter B mesohigh side and the electric current of information of voltage and low-pressure side and information of voltage are input in the second dsp chip 005 after conditioning and AD conversion, second dsp chip 005 obtains 8 tunnel second pulse signals according to the described electric current of the first isolation type bidirectional DC converter B mesohigh side and the electric current of information of voltage and low-pressure side and information of voltage, described 8 tunnel second pulse signals drive the switching tube of the first isolation type bidirectional DC converter B after amplifying by the second drive circuit 004, make the voltage stabilization of the first DC bus 07.
Described second isolation type bidirectional DC converter control circuit F comprises DSP control board 008, drive circuit board 007 and sampling conditioning module 009.First isolation type bidirectional DC converter high and low pressure side voltage and current is gathered by sampling conditioning module 009, carry out the AD sampling module delivering to the first dsp chip 002 after nursing one's health, 8 road pulse signals are produced by the ePWM module of the first dsp chip 002 after relevant control computing, finally by drive circuit board 007,8 road pulse signals are amplified, carry out the switching tube of driving isolation type two-way direct current conversion device C, target makes the voltage stabilization of DC bus 11.
Described microgrid energy dispatching management information system G comprises ARM control board 010010, handheld-type intelligent terminal 011 and host computer 012, control system start stop command can be issued by PC, can real-time monitoring system ruuning situation by PC, carry out system capacity management, electricity metering, visit system by handheld-type intelligent terminal 011, transfer ruuning situation and the electricity charge situation of system, be user-friendly to.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that, still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of right of the present invention.

Claims (10)

1. a direct-current grid intelligent power supply system, is characterized in that, comprises three-phase alternating current electrical network, high-power factory rectifier (A), first isolation type bidirectional DC converter (B), second isolation type bidirectional DC converter (C), first DC bus (07), second DC bus (11), microgrid energy dispatching management information system (G), first control circuit, second control circuit, 3rd control circuit, for gathering the three-phase primary voltage information of three-phase alternating current electrical network, first sampling modulate circuit (003) of three-phase inlet wire current information and DC voltage information, for the electric current of the electric current and information of voltage and low-pressure side that gather the first isolation type bidirectional DC converter (B) mesohigh side and the second sampling modulate circuit (006) of information of voltage, and for the electric current of the electric current and information of voltage and low-pressure side that gather the second isolation type bidirectional DC converter (C) mesohigh side and the 3rd sampling modulate circuit (009) of information of voltage,
Described three-phase alternating current electrical network is connected with the input of high-power factory rectifier (A), and the output of high-power factory rectifier (A) is connected with the first DC bus (07) and the second DC bus (11) respectively by the first isolation type bidirectional DC converter (B) and the second isolation type bidirectional DC converter (C);
Described microgrid energy dispatching management information system (G) and first control circuit, second control circuit and the 3rd control circuit are connected, the output of the first sampling modulate circuit (003) is connected with the input of first control circuit, the output of first control circuit is connected with the control end of high-power factory rectifier (A), the output of the second sampling modulate circuit (006) is connected with the input of second control circuit, the output of second control circuit is connected with the control end of the first isolation type bidirectional DC converter (B), the output of the 3rd sampling modulate circuit (009) is connected with the input of the 3rd control circuit, the output of the 3rd control circuit is connected with the control end of the second isolation type bidirectional DC converter (C).
2. direct-current grid intelligent power supply system according to claim 1, is characterized in that, the input of described three-phase alternating current electrical network and high-power factory rectifier (A) protects by first and soft opening device (01) is connected.
3. direct-current grid intelligent power supply system according to claim 2; it is characterized in that, the output of described high-power factory rectifier (A) is respectively by the second protection and soft opening device (04) and the 3rd protects and soft opening device (08) is connected with the first isolation type bidirectional DC converter (B) and the second isolation type bidirectional DC converter (C).
4. direct-current grid intelligent power supply system according to claim 1, it is characterized in that, described first control circuit comprises the first dsp chip (002) and the first drive circuit (001), the output of the first sampling modulate circuit (003) is connected with the input of the first dsp chip (002), and the output of the first dsp chip (002) is connected by the control end of the first drive circuit (001) with high-power factory rectifier (A).
5. direct-current grid intelligent power supply system according to claim 4, it is characterized in that, described second control circuit comprises dsp chip (005) and the second drive circuit (004), the output of the second sampling modulate circuit (006) is connected with the input of dsp chip (005), and the output of dsp chip (005) is connected by the control end of the second drive circuit (004) with the first isolation type bidirectional DC converter (B).
6. direct-current grid intelligent power supply system according to claim 5, it is characterized in that, described 3rd control circuit comprises the 3rd dsp chip (008) and the 3rd drive circuit (007), the output of the 3rd sampling modulate circuit (009) is connected with the input of the 3rd dsp chip (008), and the output of the 3rd dsp chip (008) is connected by the control end of the 3rd drive circuit (007) with the second isolation type bidirectional DC converter (C).
7. direct-current grid intelligent power supply system according to claim 1, it is characterized in that, described high-power factory rectifier (A) comprises Three-phase electric-wave filter (02) and three-phase fully-controlled bridge circuit (03), first protection and soft opening device (01) are connected with the input of Three-phase electric-wave filter (02), the output of Three-phase electric-wave filter (02) is connected with the input of three-phase fully-controlled bridge circuit (03), the output of three-phase fully-controlled bridge circuit (03) is connected with the first isolation type bidirectional DC converter (B) and the second isolation type bidirectional DC converter (C) respectively, the input of the first sampling modulate circuit (003) is connected with the output of Three-phase electric-wave filter (02), the output of the first drive circuit (001) is connected with the control end of three-phase fully-controlled bridge circuit (03).
8. direct-current grid intelligent power supply system according to claim 1, it is characterized in that, described microgrid energy dispatching management information system (G) comprises handheld-type intelligent terminal (011), ARM control board (010) and host computer (012), and the control end of the control end of ARM control board (010) and first control circuit, the control end of second control circuit, the 3rd control circuit, host computer (012) and handheld-type intelligent terminal (011) are connected.
9. direct-current grid intelligent power supply system according to claim 1, is characterized in that, the voltage on described first DC bus (07) is 48V, and the voltage on the second DC bus (11) is 400V.
10. direct-current grid intelligent power supply system according to claim 4, it is characterized in that, the DC voltage information of three-phase alternating current electrical network is gathered by the first sampling modulate circuit (003), three-phase inlet wire current information and three-phase primary voltage information, first dsp chip (002) is to the DC voltage information of three-phase alternating current electrical network, three-phase inlet wire current information and three-phase primary voltage information carry out nursing one's health and AD conversion, and the voltage-phase of three-phase alternating current electrical network is first locked by phase-locked loop, then with the voltage-phase of described three-phase alternating current electrical network for benchmark carries out 3/2 conversion and dq rotation transformation successively, first outer voltage PI computing is carried out under dq coordinate system, obtain current inner loop set-point, described current inner loop set-point carry out current inner loop PI computing obtain high-power factory rectifier (A) dq coordinate be under the given magnitude of voltage of port, again by described high-power factory rectifier (A) dq coordinate be under the given magnitude of voltage of port carry out dq inverse transformation and 3/2 inverse transformation successively, obtain the given magnitude of voltage of abc coordinate system lower port, then SPWM modulation is carried out to the given magnitude of voltage of abc coordinate system lower port, and pass through ePWM CMOS macro cell 6 tunnel first pulse signal of the first dsp chip (002), described first drive circuit (001) is amplified 6 tunnel first pulse signals, and the switching tube of high-power factory rectifier (A) is driven by 6 tunnels first pulse signals after amplification, make three-phase inlet wire current i a, i b, i csineization, and make three-phase inlet wire current i a, i b, i cwith the voltage u of three-phase alternating current electrical network a, u b, u csame-phase, makes the DC voltage V that high-power factory rectifier (A) exports dckeep constant and unity power factor operation.
CN201510141926.7A 2015-03-27 2015-03-27 Intelligent direct-current micro-grid power supply system Pending CN104701836A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106787761A (en) * 2016-12-30 2017-05-31 西安交通大学 A kind of transient current control method of the full-bridge direct current converter based on triple phase shifts
CN110148939A (en) * 2019-05-29 2019-08-20 哈尔滨工业大学 A kind of home electrical energy source router

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203368356U (en) * 2013-08-13 2013-12-25 青岛海信电器股份有限公司 Power supply circuit and television
CN104022661A (en) * 2014-06-11 2014-09-03 合肥工业大学 Switching power supply for AC/DC-DC self-adaptive instrument within ultra-wide voltage input range
CN104319816A (en) * 2014-11-17 2015-01-28 合肥工业大学 Optical storage alternating current and direct current hybrid micro-grid system and control method thereof
CN104333026A (en) * 2014-11-12 2015-02-04 广西大学 Power feed-forward compensation based isolated operation direct current micro grid energy storage voltage stabilizing control method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203368356U (en) * 2013-08-13 2013-12-25 青岛海信电器股份有限公司 Power supply circuit and television
CN104022661A (en) * 2014-06-11 2014-09-03 合肥工业大学 Switching power supply for AC/DC-DC self-adaptive instrument within ultra-wide voltage input range
CN104333026A (en) * 2014-11-12 2015-02-04 广西大学 Power feed-forward compensation based isolated operation direct current micro grid energy storage voltage stabilizing control method
CN104319816A (en) * 2014-11-17 2015-01-28 合肥工业大学 Optical storage alternating current and direct current hybrid micro-grid system and control method thereof

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
刘兰枚: "直流微电网中双向变流器的研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 *
胡舒阳: "直流微网中双向DC/DC变换器的研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 *
郭伟等: "应用于电动汽车充电站的PWM整流器控制方法", 《电工技术学报》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106787761A (en) * 2016-12-30 2017-05-31 西安交通大学 A kind of transient current control method of the full-bridge direct current converter based on triple phase shifts
CN106787761B (en) * 2016-12-30 2019-03-01 西安交通大学 A kind of transient current control method of the full-bridge direct current converter based on triple phase shifts
CN110148939A (en) * 2019-05-29 2019-08-20 哈尔滨工业大学 A kind of home electrical energy source router

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