CN209626973U - Highly compatible alternating current-direct current mixes distribution system - Google Patents
Highly compatible alternating current-direct current mixes distribution system Download PDFInfo
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- CN209626973U CN209626973U CN201920476722.2U CN201920476722U CN209626973U CN 209626973 U CN209626973 U CN 209626973U CN 201920476722 U CN201920476722 U CN 201920476722U CN 209626973 U CN209626973 U CN 209626973U
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- power supply
- direct current
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
Abstract
The utility model discloses a kind of highly compatible alternating current-direct currents to mix distribution system, it is characterized in that: rectifier converter, photovoltaic converter, and energy-storage units reversible transducer is by being connected in parallel on 600V DC bus, 600V DC bus is connect by buck converter with 220V DC bus, and to such as direct current central air-conditioning is powered in system, 220V DC bus is DC load power supply by isolated converter, regular alternating current load is then connected to according to the actual situation on 380VAC or 220VAC Alternating Current Power Supply bus, for being similar to the sensibility load of frequency converter or data center's computer, then it is powered by corresponding three-phase or individual event uninterruptible power supply UPS.Utility model works effect is good.
Description
Technical field
The utility model relates to a kind of compatible alternating current-direct currents to mix distribution system.
Background technique
Distributed power generation can realize the effective use of renewable energy, good with environment compatibility, however distributed power generation is again
Have the characteristics that randomness is strong, poor controllability, microgrid then provides a kind of this contradictory effective way of solution.In traditional sense
Microgrid be divided into AC microgrids, direct-current micro-grid and alternating current-direct current mixing microgrid, AC microgrids and direct-current micro-grid are in actual application
There can be the drawbacks of largely using converters in the process, and alternating current-direct current mixing microgrid is due to AC and DC two
Class bus can greatly reduce the demand for converters if cooperating suitable voltage class and structure design again,
And it realizes and powers for the compatible of current nearly all conventional load.
Summary of the invention
The purpose of this utility model is to provide a kind of highly compatible alternating current-direct currents of good working effect to mix distribution system.
The technical solution of the utility model is:
A kind of highly compatible alternating current-direct current mixing distribution system, it is characterized in that: rectifier converter, photovoltaic converter and storage
For energy unit reversible transducer by being connected in parallel on 600V DC bus, 600V DC bus passes through buck converter and 220V
DC bus connection, and to such as direct current central air-conditioning is powered in system, 220V DC bus is direct current by isolated converter
Load power supply, regular alternating current load is then connected to according to the actual situation on 380VAC or 220VAC Alternating Current Power Supply bus, for class
Be similar to the sensibility load of frequency converter or data center's computer, then by corresponding three-phase or individual event uninterruptible power supply UPS into
Row power supply.
DC side with exchange side and connected by AC/DC rectifier converter, realize the commutation supply voltage for exchanging lateral DC side, it is whole
Stream uses Vienna rectifier converter.
Photovoltaic converter cooperates BOOST booster circuit using maximum power point-tracing control method, completes photovoltaic module
Power generation boosting.
Energy storage reversible transducer is connected to respectively between battery group and DC bus, realizes the charge and discharge fulgurite to battery group
Reason control, recommending inside the two-way DC/DC converter of phase-shifting full-bridge has high-frequency isolation transformer, capacitance, resonant inductance, filter
Wave inductance, filter capacitor, metal-oxide-semiconductor and its parasitic diode and parasitic capacitance, high frequency transformer realize former secondary side it is electrical every
From, while realizing the electrical isolation of DC bus and battery group, i.e., the ground fault of DC bus cannot be transmitted to battery
The ground fault of side, battery group side can not be transmitted to DC bus side.
600V DC bus is connected by buck converter with 220V DC bus, and buck converter is depressured using BUCK
Topology passes through the duty cycle adjustment output voltage of control switch device；It is mainly mounted on 220V DC bus common in building
Office load and some small household appliances.
For middle high power AC sensitive load, using three phase full bridge type uninterruptible power supply, three-phase uninterrupted power supply it is straight
Stream flanks 600V DC bus, exchanges side by static switch and breaker and connects three-phase alternating current, under normal circumstances three-phase alternating current
Load, frequency, phase and the amplitude of system real-time monitoring three-phase alternating current are flowed to by isolating transformer, once alternating current occurs to break
Electricity or temporarily drop, then the DC side of power supply is reverse into exchange by inverter circuit and gives load power supply, and switching time of whole process <
5ms, to guarantee the uninterrupted power supply of load.
Sensitive load is exchanged for small-power, then uses single-phase full bridge type uninterruptible power supply, single-phase full bridge uninterruptible power supply
Exchange flank single-phase alternating current, direct current flanks direct current 220VDC bus；Alternating current is through over commutation-inversion under normal circumstances, and
It is exported by isolating transformer and is used to load, when power-off or temporarily drop occur for alternating current, then the DC side of power supply passes through inverter circuit
It is reverse into exchange to power to load, handoff procedure 0ms guarantees the uninterrupted power supply of load.
The utility model is exchanged using 600VDC with 220VDC two-stage DC voltage level and 380VAC, 220VAC two-stage
Voltage class, meets the power demands of nearly all office and the indispensable load of life in system, and efficiently uses distributed photovoltaic,
Save electric energy；
Three-way power realizes the redundant power supply of system, and any loss of power not will cause the stoppage in transit of system, greatly mention
The high power supply reliability of system；
For the sensitive load more demanding to power supply reliability, powered using uninterruptible power supply UPS, with conventionally employed storage
Energy is different as the mode of standby, and the UPS DC side in system is directly connected to corresponding voltage grade DC bus, improves UPS
The controllability of power supply；
Photovoltaic converter integrates MPPT maximum power point tracking (MPPT) and DC/DC mapping function, and it is real to simplify traditional two-stage
Existing (level-one realizes MPPT tracking, and level-one realizes Technics of Power Electronic Conversion) scheme, so that photovoltaic conversion module is more economical, compact,
Its topology is as shown in Figure 2；
All converters have warm connection function in system, by the combined in real time of standard cabinet body feasible system capacity,
While system structure is compact, flexibility ratio is high；
All converters are all made of intelligentized design, have complete protection and communication function, wherein communicating
Using the standard Modbus agreement of 485 interfaces or Ethernet interface.
Detailed description of the invention
The utility model is described in further detail with reference to the accompanying drawings and examples.
Fig. 1 is highly compatible alternating current-direct current mixing distribution system topological diagram.
Fig. 2 is rectifier converter topological diagram.
Fig. 3 is photovoltaic boost converter topology figure.
Fig. 4 is the two-way DC/DC converter topology figure of energy storage.
Fig. 5 is buck converter topology figure.
Fig. 6 is three-phase UPS topological diagram.
Fig. 7 is single-phase UPS topological diagram.
Specific embodiment
A kind of highly compatible alternating current-direct current mixing distribution system, rectifier converter, photovoltaic converter and energy-storage units are two-way
By being connected in parallel on 600V DC bus, 600V DC bus is connected converter by buck converter and 220V DC bus
It connects, and to such as direct current central air-conditioning is powered in system, 220V DC bus is DC load power supply by isolated converter,
Regular alternating current load is then connected to according to the actual situation on 380VAC or 220VAC Alternating Current Power Supply bus, for being similar to frequency converter
Or the sensibility load of data center's computer, then it is powered by corresponding three-phase or individual event uninterruptible power supply UPS.
DC side with exchange side and connected by AC/DC rectifier converter, realize the commutation supply voltage for exchanging lateral DC side, it is whole
Stream uses Vienna rectifier converter.
Photovoltaic converter cooperates BOOST booster circuit using maximum power point-tracing control method, completes photovoltaic module
Power generation boosting.
Energy storage reversible transducer is connected to respectively between battery group and DC bus, realizes the charge and discharge fulgurite to battery group
Reason control, recommending inside the two-way DC/DC converter of phase-shifting full-bridge has high-frequency isolation transformer, capacitance, resonant inductance, filter
Wave inductance, filter capacitor, metal-oxide-semiconductor and its parasitic diode and parasitic capacitance, high frequency transformer realize former secondary side it is electrical every
From, while realizing the electrical isolation of DC bus and battery group, i.e., the ground fault of DC bus cannot be transmitted to battery
The ground fault of side, battery group side can not be transmitted to DC bus side.
600V DC bus is connected by buck converter with 220V DC bus, and buck converter is depressured using BUCK
Topology passes through the duty cycle adjustment output voltage of control switch device；It is mainly mounted on 220V DC bus common in building
Office load and some small household appliances.
For middle high power AC sensitive load, using three phase full bridge type uninterruptible power supply, three-phase uninterrupted power supply it is straight
Stream flanks 600V DC bus, exchanges side by static switch and breaker and connects three-phase alternating current, under normal circumstances three-phase alternating current
Load, frequency, phase and the amplitude of system real-time monitoring three-phase alternating current are flowed to by isolating transformer, once alternating current occurs to break
Electricity or temporarily drop, then the DC side of power supply is reverse into exchange by inverter circuit and gives load power supply, and switching time of whole process <
5ms, to guarantee the uninterrupted power supply of load.
Sensitive load is exchanged for small-power, then uses single-phase full bridge type uninterruptible power supply, single-phase full bridge uninterruptible power supply
Exchange flank single-phase alternating current, direct current flanks direct current 220VDC bus；Alternating current is through over commutation-inversion under normal circumstances, and
It is exported by isolating transformer and is used to load, when power-off or temporarily drop occur for alternating current, then the DC side of power supply passes through inverter circuit
It is reverse into exchange to power to load, handoff procedure 0ms guarantees the uninterrupted power supply of load.
Claims (5)
1. a kind of highly compatible alternating current-direct current mixes distribution system, it is characterized in that: rectifier converter, photovoltaic converter and energy storage
For unit reversible transducer by being connected in parallel on 600V DC bus, 600V DC bus is straight by buck converter and 220V
Bus connection is flowed, and to such as direct current central air-conditioning is powered in system, 220V DC bus is negative for direct current by isolated converter
Lotus power supply, regular alternating current load is then connected to according to the actual situation on 380VAC or 220VAC Alternating Current Power Supply bus, for similar
In frequency converter or the sensibility load of data center's computer, then carried out by corresponding three-phase or individual event uninterruptible power supply UPS
Power supply.
2. highly compatible alternating current-direct current according to claim 1 mixes distribution system, it is characterized in that: DC side leads to side is exchanged
The connection of AC/DC rectifier converter is crossed, realizes the commutation supply voltage for exchanging lateral DC side, rectification uses Vienna rectifier converter.
3. highly compatible alternating current-direct current according to claim 1 mixes distribution system, it is characterized in that: photovoltaic converter is using most
High-power point-tracing control method cooperates BOOST booster circuit, completes the power generation boosting of photovoltaic module.
4. highly compatible alternating current-direct current according to claim 1 mixes distribution system, it is characterized in that: energy storage reversible transducer
It is connected between battery group and DC bus respectively, realizes and the management of charging and discharging of battery group is controlled, it is double to recommend phase-shifting full-bridge
There are high-frequency isolation transformer, capacitance, resonant inductance, filter inductance, filter capacitor, metal-oxide-semiconductor inside to DC/DC converter
And its parasitic diode and parasitic capacitance, high frequency transformer realize the electrical isolation on former secondary side, while realize DC bus and
The electrical isolation of battery group, the i.e. ground fault of DC bus cannot be transmitted to battery side, and battery group side connects
Earth fault can not be transmitted to DC bus side.
5. highly compatible alternating current-direct current according to claim 1 mixes distribution system, it is characterized in that: 600V DC bus passes through
Buck converter is connected with 220V DC bus, and buck converter uses BUCK buck topology, passes through control switch device
Duty cycle adjustment output voltage；Commonly handle official business load and some small-sized household electricity are mainly mounted in building on 220V DC bus
Device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920476722.2U CN209626973U (en) | 2019-04-10 | 2019-04-10 | Highly compatible alternating current-direct current mixes distribution system |
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| CN201920476722.2U CN209626973U (en) | 2019-04-10 | 2019-04-10 | Highly compatible alternating current-direct current mixes distribution system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110138075A (en) * | 2019-04-10 | 2019-08-16 | 国网江苏省电力有限公司南通供电分公司 | Highly compatible alternating current-direct current mixes distribution system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110138075A (en) * | 2019-04-10 | 2019-08-16 | 国网江苏省电力有限公司南通供电分公司 | Highly compatible alternating current-direct current mixes distribution system |
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