CN203368044U - Bidirectional ac/dc multi-power-supply multi-load safe-isolation micro electrical network system - Google Patents
Bidirectional ac/dc multi-power-supply multi-load safe-isolation micro electrical network system Download PDFInfo
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- CN203368044U CN203368044U CN201320076468XU CN201320076468U CN203368044U CN 203368044 U CN203368044 U CN 203368044U CN 201320076468X U CN201320076468X U CN 201320076468XU CN 201320076468 U CN201320076468 U CN 201320076468U CN 203368044 U CN203368044 U CN 203368044U
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
Abstract
The utility model relates to a bidirectional ac/dc multi-power-supply multi-load safe-isolation micro electrical network system which can realize both grid-connected and off-network work, includes safe isolation, and can supply power for ac and dc loads. A new-energy power generation source, a dc load, an ac load, a storage battery, a power distribution network, a bidirectional grid-connection or off-network inversion circuit, a power-frequency isolation transformer, a bidirectional dc high-frequency isolation circuit and a storage battery charging and discharging controller are combined and connected to form a power generation and utilization system structure. The micro electrical network system includes a grid-connected circuit structure which can supply power for the ad and dc loads and includes a dc safe isolation circuit and an ac safe isolation circuit. The power generation source includes generation via new energy as photovoltaic power generation or wind power generation. When faults occur in the power distribution network, the system can maintain reliable work of the ac and dc loads for a certain time; and when the photovoltaic power generation source or the storage battery has faults or has no power, the distribution network reliably supplies power to the ac and dc loads.
Description
Technical field
The utility model belongs to the generation of electricity by new energy field, be a kind of that connect generation of electricity by new energy source, AC network, DC load, AC load and energy-storage units and have the micro-grid system structure of safety isolation, can be DC load and AC load reliable power supply simultaneously.
Background technology
At present, the main grid-connected system of known grid-connected power generation system, from the net electricity generation system, its load is mainly AC load.When grid-connected system breaks down at electrical network, no matter whether the new energy resources system energy source has enough energy, all will stop powering to the load until power system restoration is normal.And in the new energy grid-connected power system, majority lacks the safe isolation design of reliable DC side.Stand alone generating system is operated in from net state, and energy source mostly is the solar power generation with fluctuation, wind power generation etc., and when break down in the generation of electricity by new energy source, even near electrical network is normal, electrical network also can't be given and power supply, until the generation of electricity by new energy source recovers normal.
Summary of the invention
Low in order to overcome in existing grid-connected power generation system power supply reliability, improve Electrical Safety rate, generation of electricity by new energy service efficiency and increase with electrical interface (exchanging interface and DC interface), the utility model provides a kind of two-way alternating current-direct current multi-source, multi-load to isolate safely micro-grid system, this system can continue to AC load and DC load power supply when break down in power distribution network or generation of electricity by new energy source, and this system has also increased the safe isolation design of alternating current-direct current.
The utility model solves the technical scheme that its technical problem adopts: a kind of two-way alternating current-direct current multi-source, multi-load is isolated safely micro-grid system, generation of electricity by new energy source wherein, DC voltage booster circuit, AC load, DC load, storage battery, power distribution network, two-way grid-connected/from the net inverter circuit, the power frequency isolating transformer, bidirectional, dc high-frequency isolation circuit, the accumulator cell charging and discharging controller is connected, form generating using electricity system structure, wherein the generation of electricity by new energy source output terminal is connected to the DC voltage booster circuit input, the DC voltage booster circuit output is connected to accumulator cell charging and discharging controller and bidirectional, dc high-frequency isolation circuit input end, bidirectional, dc high-frequency isolation circuit output end be connected to DC load and two-way grid-connected/from net inverter circuit input, two-way grid-connected/be connected to power frequency isolating transformer input from net inverter circuit output, power frequency isolating transformer output connects AC load and grid-connected switch, grid-connected switch is controlled this system and is connected with power distribution network and disconnects, the accumulator cell charging and discharging controller output end connects storage battery.The micro-grid system circuit structure is grid connected structure, and this circuit structure can be AC load and DC load is powered, and has the safe buffer circuit of direct current and exchange safe buffer circuit, and DC voltage booster circuit adopts triple boost parallel circuitss.Native system is divided into 5 major parts: DC voltage booster circuit, the bidirectional, dc high-frequency isolation, direct-flow storage battery discharges and recharges, two-way grid-connected/from the net inverter circuit, the power frequency isolating transformer.DC voltage booster circuit is boosted the low-voltage DC of generation of electricity by new energy source output.After boosting, a part realizes discharging and recharging of storage battery through the direct-flow storage battery charge-discharge circuit; Another part realizes boosting through two-way high-frequency isolation transforming circuit and direct current is isolated safely.Two-way high-frequency isolation transformer forward can be realized the safe isolation of boosting, and oppositely can realize step-down and safety isolation.A two-way high-frequency isolation circuit high-pressure side part is used as DC power supply, to DC load, powered, another part flow to two-way grid-connected/from the net inverter circuit.Two-way grid-connected/from the net inverter circuit, direct current is converted to industrial-frequency alternating current, a part is for AC load power supply, a part is carried out grid-connected through the power frequency isolating transformer.Two-way grid-connected/realize the parallel network reverse function from net inverter circuit forward, oppositely can realize controlled rectification.
The beneficial effects of the utility model are, no matter, whether electrical network breaks down, the generation of electricity by new energy source all can provide the safe and reliable energy for power consumption equipment, and when breaking down or energy source while there is no electric energy in the generation of electricity by new energy source, power consumption equipment still can reliably working, has increased the safe quarantine measures of reliable alternating current-direct current simultaneously.When taking full advantage of this clean energy resource of generation of electricity by new energy, this programme guarantees power consumption equipment electricity consumption reliability, fail safe.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is electrical block diagram of the present utility model.
Fig. 2 is circuit structure schematic diagram of the present utility model.
Fig. 3 is bidirectional, dc high-frequency isolation circuit structure in the utility model
Fig. 4 be in the utility model two-way grid-connected/from net inverter circuit structure
1. bidirectional, dc high-frequency isolation circuit in figure, 2. two-way grid-connected/from the net inverter circuit.
Embodiment
In this micro-grid system two-way grid-connected/adopt eight power device unit from the net inverter circuit, power device is formula circuit structure back-to-back in twos, forward forms controlled inverter circuit structure, oppositely forms the controlled rectification circuit structure.Bidirectional, dc high-frequency isolation circuit adopts the bidirectional bridge type circuit to add the design of high frequency isolating transformer.The accumulator cell charging and discharging controller is placed on the DC voltage booster circuit output, bidirectional, dc high-frequency isolation circuit input end; AC load should be placed power frequency isolating transformer grid side, and grid-connected switch is from net one side, and DC load is placed bidirectional, dc high-frequency isolation circuit output end, two-way grid-connected/from net inverter circuit input.What the accumulator cell charging and discharging controller adopted is the design of Bidirectional up-down volt circuit, forward is to charge in batteries, boost and adopt single-phase booster circuit, the accumulator charging/discharging circuit output is connected with micro-grid system booster circuit output, as one of power supply of micro-grid system.
Reference is at Fig. 1, and the generation of electricity by new energy source comprises solar power generation source and wind power generation source etc.When energy source only is solar power generation, when generation of electricity by new energy source and the equal fault-free of electrical network and new forms of energy normal power generation, generation of electricity by new energy source output low pressure 20-40V direct current, partly boosted and power control through DC boosting, boosts to 100V.Node 1 is divided into two parts by direct current, and a part is connected with the battery charging and discharging controller and realizes the discharging and recharging of storage battery, and another part is realized by bidirectional, dc high-frequency isolation circuit that the circuit isolation reaches and boosted to again 200V.Node 2 is the DC load power supply, when generation of electricity by new energy is greater than the DC load electricity consumption, dump energy through two-way grid-connected/from the net inverter circuit, to AC portion, power, node 3 is by power frequency isolating transformer and node 4 isolation, node 4 is the AC load power supply, when the AC load power consumption still is less than its amount of power supply, node 4 flows to electrical network by dump energy.When electrical network breaks down, system disconnects grid-connected switch, and all loads are by generation of electricity by new energy source and storage battery joint supply.When electrical network normal, generation of electricity by new energy source and storage battery break down or while not having electric energy or electric energy to be less than the required electricity consumption of load, provide the electric energy compensation by electrical network, now electrical network is to handing over load to be powered, realize that through the power frequency isolating transformer safety isolation arrives node 4 simultaneously, and by two-way grid-connected/carry out rectification from the net inverter circuit control to arrive node 2,2 pairs of DC load of node are powered, advanced bidirectional, dc high-frequency isolation circuit simultaneously and arrive node 1,1 pair of node carries out charging energy-storing by the battery charging and discharging controller to storage battery.
Claims (5)
1. a two-way alternating current-direct current multi-source, multi-load is isolated safely micro-grid system, it is characterized in that: the generation of electricity by new energy source, DC voltage booster circuit, AC load, DC load, storage battery, power distribution network, two-way grid-connected/from the net inverter circuit, the power frequency isolating transformer, bidirectional, dc high-frequency isolation circuit, the accumulator cell charging and discharging controller is connected, form generating using electricity system structure, wherein the generation of electricity by new energy source output terminal is connected to the DC voltage booster circuit input, the DC voltage booster circuit output is connected to accumulator cell charging and discharging controller and bidirectional, dc high-frequency isolation circuit input end, bidirectional, dc high-frequency isolation circuit output end be connected to DC load and two-way grid-connected/from net inverter circuit input, two-way grid-connected/be connected to power frequency isolating transformer input from net inverter circuit output, power frequency isolating transformer output connects AC load and grid-connected switch, grid-connected switch is controlled being connected and disconnection of this system and power distribution network, the accumulator cell charging and discharging controller output end connects storage battery, the micro-grid system circuit structure is grid connected structure, and this circuit structure can be AC load and DC load is powered, and has the safe buffer circuit of direct current and exchange safe buffer circuit, and DC voltage booster circuit adopts triple boost parallel circuitss.
2. micro-grid system according to claim 1, it is characterized in that: two-way grid-connected/adopt eight power device unit from the net inverter circuit, power device is formula circuit structure back-to-back in twos, and forward forms controlled inverter circuit structure, oppositely forms the controlled rectification circuit structure.
3. micro-grid system according to claim 1 is characterized in that: bidirectional, dc high-frequency isolation circuit adopts the bidirectional bridge type circuit to add the design of high frequency isolating transformer.
4. micro-grid system according to claim 1, it is characterized in that: the accumulator cell charging and discharging controller is placed on the DC voltage booster circuit output, bidirectional, dc high-frequency isolation circuit input end; AC load should be placed the Industrial Frequency Transformer grid side, and grid-connected switch is from net one side; DC load is placed bidirectional, dc high-frequency isolation circuit output end, two-way grid-connected/from net inverter circuit input.
5. micro-grid system according to claim 1, it is characterized in that: what the accumulator cell charging and discharging controller adopted is the design of Bidirectional up-down volt circuit, forward is to charge in batteries, boost and adopt single-phase booster circuit, the accumulator charging/discharging circuit output is connected with micro-grid system booster circuit output, as one of power supply of micro-grid system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320076468XU CN203368044U (en) | 2013-01-23 | 2013-01-23 | Bidirectional ac/dc multi-power-supply multi-load safe-isolation micro electrical network system |
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| CN201320076468XU CN203368044U (en) | 2013-01-23 | 2013-01-23 | Bidirectional ac/dc multi-power-supply multi-load safe-isolation micro electrical network system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104283493A (en) * | 2014-09-29 | 2015-01-14 | 苏州克兰兹电子科技有限公司 | Power generating device with wind power and solar energy utilized |
| CN104362612A (en) * | 2014-10-21 | 2015-02-18 | 广东美的制冷设备有限公司 | Power supply system of air conditioner and family micro grid system based on photovoltaic power supply |
| CN104578166A (en) * | 2015-01-29 | 2015-04-29 | 国家电网公司 | Alternating current-direct current micro-grid system on basis of electricity energy collector |
| CN104901302A (en) * | 2015-06-08 | 2015-09-09 | 北京宏光星宇科技发展有限公司 | Centralized alternating-current-and-direct-current dual-input direct-current remote power supply system |
| CN105471387A (en) * | 2015-11-26 | 2016-04-06 | 中国空间技术研究院 | Circuit topology and energy management method of satellite power source system |
| CN109120010A (en) * | 2018-09-21 | 2019-01-01 | 无锡美凯能源科技有限公司 | A kind of alternating current-direct current mixing tandem type micro-capacitance sensor applied to communication base station field |
| CN109494807A (en) * | 2018-12-29 | 2019-03-19 | 四川太牛电子科技有限公司 | A kind of solar energy auto-parallel inverter and its control method |
| CN109638831A (en) * | 2019-01-31 | 2019-04-16 | 上海电机学院 | A kind of wind light mutual complementing mixing micro-capacitance sensor fault processing system and fault handling method |
| US10749430B2 (en) | 2015-03-13 | 2020-08-18 | Positec Power Tools (Suzhou) Co., Ltd. | Power transmission apparatus and control method therefor, and power supply system |
| US11218001B2 (en) | 2020-01-10 | 2022-01-04 | Delta Electronics (Shanghai) Co., Ltd | Power supply system and method for alternating current load |
-
2013
- 2013-01-23 CN CN201320076468XU patent/CN203368044U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104283493A (en) * | 2014-09-29 | 2015-01-14 | 苏州克兰兹电子科技有限公司 | Power generating device with wind power and solar energy utilized |
| CN104362612A (en) * | 2014-10-21 | 2015-02-18 | 广东美的制冷设备有限公司 | Power supply system of air conditioner and family micro grid system based on photovoltaic power supply |
| CN104578166A (en) * | 2015-01-29 | 2015-04-29 | 国家电网公司 | Alternating current-direct current micro-grid system on basis of electricity energy collector |
| US10749430B2 (en) | 2015-03-13 | 2020-08-18 | Positec Power Tools (Suzhou) Co., Ltd. | Power transmission apparatus and control method therefor, and power supply system |
| US11601002B2 (en) | 2015-03-13 | 2023-03-07 | Positec Power Tools (Suzhou) Co., Ltd. | Electrical energy transmission apparatus, method for controlling same, and power supply system |
| CN104901302A (en) * | 2015-06-08 | 2015-09-09 | 北京宏光星宇科技发展有限公司 | Centralized alternating-current-and-direct-current dual-input direct-current remote power supply system |
| CN105471387B (en) * | 2015-11-26 | 2017-12-22 | 中国空间技术研究院 | The circuit topology and energy management method of a kind of satellite power system |
| CN105471387A (en) * | 2015-11-26 | 2016-04-06 | 中国空间技术研究院 | Circuit topology and energy management method of satellite power source system |
| CN109120010A (en) * | 2018-09-21 | 2019-01-01 | 无锡美凯能源科技有限公司 | A kind of alternating current-direct current mixing tandem type micro-capacitance sensor applied to communication base station field |
| CN109494807A (en) * | 2018-12-29 | 2019-03-19 | 四川太牛电子科技有限公司 | A kind of solar energy auto-parallel inverter and its control method |
| CN109494807B (en) * | 2018-12-29 | 2021-12-21 | 四川太牛电子科技有限公司 | Solar automatic grid-connected inverter and control method thereof |
| CN109638831A (en) * | 2019-01-31 | 2019-04-16 | 上海电机学院 | A kind of wind light mutual complementing mixing micro-capacitance sensor fault processing system and fault handling method |
| US11218001B2 (en) | 2020-01-10 | 2022-01-04 | Delta Electronics (Shanghai) Co., Ltd | Power supply system and method for alternating current load |
| TWI774142B (en) * | 2020-01-10 | 2022-08-11 | 大陸商台達電子企業管理（上海）有限公司 | Ac load power supply system and method |
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Granted publication date: 20131225 Termination date: 20170123 |