CN111463827A - Multi-machine parallel small-sized micro-grid system - Google Patents
Multi-machine parallel small-sized micro-grid system Download PDFInfo
- Publication number
- CN111463827A CN111463827A CN202010309783.7A CN202010309783A CN111463827A CN 111463827 A CN111463827 A CN 111463827A CN 202010309783 A CN202010309783 A CN 202010309783A CN 111463827 A CN111463827 A CN 111463827A
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- power generation
- wind
- generation subsystem
- electric energy
- grid
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- 238000010248 power generation Methods 0.000 claims abstract description 43
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000004146 energy storage Methods 0.000 claims abstract description 9
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 9
- 238000005516 engineering process Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
-
- 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
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention relates to a multi-machine parallel small-sized micro-grid system. The system consists of a plurality of photovoltaic power generation subsystems and a wind power generation subsystem; each photovoltaic power generation subsystem comprises a solar panel, an energy storage lithium battery for storing electric energy and a light storage converter for outputting the electric energy; each wind power generation subsystem comprises a wind driven generator, a fan controller for controlling the running state of the wind driven generator, an energy storage lithium battery for storing electric energy and a wind storage converter for outputting the electric energy; each photovoltaic power generation subsystem and each wind power generation subsystem can independently operate, or a plurality of photovoltaic power generation subsystems or wind power generation subsystems can operate in parallel to supply power for loads. The invention can adapt to different load power requirements, and has low equipment operation cost and good expansion flexibility.
Description
Technical Field
The invention relates to a multi-machine parallel small-sized micro-grid system.
Background
With the increasing maturity of photovoltaic power generation and wind power generation technologies, a hybrid power supply system adopting multi-power supply combined operation is produced, and the development potential is huge. The hybrid power supply system adopts advanced PWM intelligent control and power conversion technology and combines a wind, light, oil, electricity and storage integrated power supply mode, and has the advantages of high power supply efficiency, less power supply expenditure, more stable, reliable and continuous output electric energy and the like. The wind, light, diesel and energy storage integrated hybrid power supply scheme combines a control technology with an energy system, successfully realizes the high-efficiency conversion and utilization of energy, and opens up a brand-new road for the logistics guarantee of the energy field. The traditional micro-grid system mostly adopts an integral structure, and has low redundancy and poor reliability. The equipment scale can not be flexibly adjusted according to the load power requirement, and when the load power requirement is low, the waste of equipment investment is caused; when the load power requirement is high, the device cannot be flexibly expanded.
Disclosure of Invention
The invention aims to solve the technical problem of providing a multi-machine parallel small-sized micro-grid system which can adapt to different load power requirements, and has low equipment operation cost and good expansion flexibility.
The multi-machine parallel small-sized micro-grid system consists of a plurality of photovoltaic power generation subsystems and wind power generation subsystems; each photovoltaic power generation subsystem comprises a solar panel, an energy storage lithium battery for storing electric energy and a light storage converter for outputting the electric energy; each wind power generation subsystem comprises a wind driven generator, a fan controller for controlling the running state of the wind driven generator, an energy storage lithium battery for storing electric energy and a wind storage converter for outputting the electric energy; each photovoltaic power generation subsystem and each wind power generation subsystem can independently operate and supply power to a load through an output bus, or a plurality of photovoltaic power generation subsystems or wind power generation subsystems operate in parallel and supply power to the load through the output bus; the capacity of each photovoltaic power generation subsystem or each wind power generation subsystem is 2-10 kW.
And the output bus is further connected with the diesel generator set through the grid-connected and off-grid switching device.
And the output bus is further connected with the power grid through the grid-connected and off-grid switching device.
The advantages of the invention are embodied in that:
1. The system is in modular design, the product redundancy is high, and the problem of poor reliability existing in the traditional integrated product is solved.
2. The multiple modules run in parallel, are mutually hot backup, support hot plugging, and have better power supply redundancy and higher reliability.
3. Due to the adoption of the structure that a plurality of low-power subsystems are connected in parallel, the modular design of the batteries is convenient to realize, parameters among the battery modules are consistent, the sizes of the battery modules are the same, the interchangeability is good, and the interest rate of equipment is improved.
Drawings
Fig. 1 is a schematic structural principle diagram of a multi-machine parallel small-sized microgrid system according to an embodiment of the invention.
Detailed Description
As shown in the figure, the multi-machine parallel small-sized microgrid system provided by the embodiment of the invention comprises a plurality of photovoltaic power generation subsystems and wind power generation subsystems; each photovoltaic power generation subsystem comprises a solar panel, an energy storage lithium battery for storing electric energy and a light storage converter for outputting the electric energy; each wind power generation subsystem comprises a wind driven generator, a fan controller for controlling the running state of the wind driven generator, an energy storage lithium battery for storing electric energy and a wind storage converter for outputting the electric energy; each photovoltaic power generation subsystem and each wind power generation subsystem can independently operate and supply power to a load through an output bus, or a plurality of photovoltaic power generation subsystems or wind power generation subsystems operate in parallel and supply power to the load through the output bus; the capacity of each photovoltaic power generation subsystem or each wind power generation subsystem is 2-10 kW. The output bus is connected with the diesel generator set and an external power grid through the grid-connected and off-grid switching device. The diesel generating set is used as a standby power supply of the system, and when photovoltaic power generation and wind power generation are insufficient to support a load to operate, the diesel generating set is started to be connected with the new energy power generation system in a grid mode through the grid-connected and off-grid switching device to supply power to the load or supply power through an external power grid.
In the system, in the aspect of software control, the inverted electric energy is used for collecting a voltage signal of a diesel engine (or a power grid) through a sampling signal of a grid-connected switching device to perform phase-locking operation, and when the phase and the size are kept consistent, phase-locking grid connection is completed.
The converter adopts H5 topology, and conduction loss is little, has improved the complete machine efficiency of system, has improved common mode voltage, has realized two-way rectification and contravariant under the no transformer, during current afterflow, disconnects lithium cell or solar cell from the electric wire netting to prevent DC positive and negative two-stage voltage along with switching frequency fluctuation, thereby keep common mode voltage unchangeable.
The system is provided with an EMS control unit, an economic efficiency and reliability target tracking is carried out through two optimal targets, namely a modbus protocol and a CANopen protocol, the SOC, the voltage current and the output of the battery are monitored in real time, the charging power and the discharging power of the converter are calculated, and the charging power and the discharging power are issued to the converter for execution. When the optimal fuel oil rotating speed of the diesel engine is considered, the voltage and the current of the diesel engine are sampled, the converter output is controlled in a closed loop mode, the optimal matching of the load to the diesel engine is achieved, and the most economical operation mode of the diesel engine is achieved.
Claims (3)
1. A multi-machine parallel small-sized micro-grid system is characterized in that: the system consists of a plurality of photovoltaic power generation subsystems and a wind power generation subsystem; each photovoltaic power generation subsystem comprises a solar panel, an energy storage lithium battery for storing electric energy and a light storage converter for outputting the electric energy; each wind power generation subsystem comprises a wind driven generator, a fan controller for controlling the running state of the wind driven generator, an energy storage lithium battery for storing electric energy and a wind storage converter for outputting the electric energy; each photovoltaic power generation subsystem and each wind power generation subsystem can independently operate and supply power to a load through an output bus, or a plurality of photovoltaic power generation subsystems or wind power generation subsystems operate in parallel and supply power to the load through the output bus; the capacity of each photovoltaic power generation subsystem or each wind power generation subsystem is 2-10 kW.
2. The multiple parallel small microgrid system of claim 1, characterized in that: the output bus is connected with the diesel generator set through the grid-connected and off-grid switching device.
3. The multiple parallel small microgrid system of claim 1, characterized in that: the output bus is connected with a power grid through the grid-connected and off-grid switching device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010309783.7A CN111463827A (en) | 2020-04-20 | 2020-04-20 | Multi-machine parallel small-sized micro-grid system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010309783.7A CN111463827A (en) | 2020-04-20 | 2020-04-20 | Multi-machine parallel small-sized micro-grid system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111463827A true CN111463827A (en) | 2020-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010309783.7A Pending CN111463827A (en) | 2020-04-20 | 2020-04-20 | Multi-machine parallel small-sized micro-grid system |
Country Status (1)
| Country | Link |
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| CN (1) | CN111463827A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112713613A (en) * | 2020-12-31 | 2021-04-27 | 江苏镇安电力设备有限公司 | Square cabin type modularized micro-grid system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074952A (en) * | 2010-12-03 | 2011-05-25 | 中国科学院广州能源研究所 | Independent micro-grid system |
| CN103280844A (en) * | 2013-05-14 | 2013-09-04 | 国家电网公司 | Alternating/direct current hybrid multi-level micro grid system |
| CN103532164A (en) * | 2012-07-03 | 2014-01-22 | 上海稳得新能源科技有限公司 | Wind-light-diesel complementary AC/DC intelligent micro-grid system |
| CN107769258A (en) * | 2017-11-29 | 2018-03-06 | 湖南红太阳新能源科技有限公司 | The electric power system and its control method of a kind of independent micro-grid |
| CN108599232A (en) * | 2018-03-27 | 2018-09-28 | 中国电力科学研究院有限公司 | A kind of the wind-light storage energy exchange control method and system of virtual synchronous generator |
| CN212462805U (en) * | 2020-04-20 | 2021-02-02 | 江苏镇安电力设备有限公司 | Multi-machine parallel small-sized micro-grid system |
-
2020
- 2020-04-20 CN CN202010309783.7A patent/CN111463827A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074952A (en) * | 2010-12-03 | 2011-05-25 | 中国科学院广州能源研究所 | Independent micro-grid system |
| CN103532164A (en) * | 2012-07-03 | 2014-01-22 | 上海稳得新能源科技有限公司 | Wind-light-diesel complementary AC/DC intelligent micro-grid system |
| CN103280844A (en) * | 2013-05-14 | 2013-09-04 | 国家电网公司 | Alternating/direct current hybrid multi-level micro grid system |
| CN107769258A (en) * | 2017-11-29 | 2018-03-06 | 湖南红太阳新能源科技有限公司 | The electric power system and its control method of a kind of independent micro-grid |
| CN108599232A (en) * | 2018-03-27 | 2018-09-28 | 中国电力科学研究院有限公司 | A kind of the wind-light storage energy exchange control method and system of virtual synchronous generator |
| CN212462805U (en) * | 2020-04-20 | 2021-02-02 | 江苏镇安电力设备有限公司 | Multi-machine parallel small-sized micro-grid system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112713613A (en) * | 2020-12-31 | 2021-04-27 | 江苏镇安电力设备有限公司 | Square cabin type modularized micro-grid system |
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