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Title:
WIND-PHOTOVOLTAIC-DIESEL INTELLIGENT ALTERNATING CURRENT MICROGRID SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/192040
Kind Code:
A1
Abstract:
A wind-photovoltaic-diesel intelligent alternating current (AC) microgrid system, comprising a wind turbine, a photovoltaic power generation array, a diesel generator, an energy storage device, and a load and microgrid energy management platform. An electrical energy output end of the wind turbine is connected to an AC power input end of an AC/direct current (DC)/AC converter, and an output end of the AC/DC/AC converter is connected to a microgrid AC busbar; an electrical energy output end of the photovoltaic power generation array is connected to an input end of a DC/AC converter, and an output end of the DC/AC converter is connected to the microgrid AC busbar; an electrical energy output end of the diesel generator is connected to the microgrid AC busbar; an electrical energy output end of the energy storage device is connected to an input end of a DC/DC converter, and an output end of the DC/DC converter is connected to a DC busbar; an electrical energy output end of the DC busbar is connected to the input end of the DC/AC converter, and the output end of the DC/AC converter is connected to the microgrid AC busbar; the microgrid AC busbar is connected to a point of common coupling (PCC) by means of a grid-connected switch, and is connected to the load and microgrid energy management platform; the microgrid energy management platform is further connected to the wind turbine, the photovoltaic power generation array, the diesel generator, and the energy storage device to implement information transmission. The system interconnects the wind turbine, the photovoltaic power generation array, the diesel generator, the energy storage device, and the load and microgrid energy management platform, can implement a grid-connected operation and an independent operation, and can also implement seamless switch between the grid-connected operation and the independent operation; power balance between the power supply and the load can be implemented; the microgrid energy management platform having energy management and scheduling functions is configured, so that power fluctuations caused by wind power, photovoltaic and load changes, etc. can be quickly smoothed.

Inventors:
WANG YAO (CN)
WANG ZEFANG (CN)
LIU XIAOQIANG (CN)
LI QINGCHUN (CN)
XU HAIFENG (CN)
CHEN GUANGPING (CN)
Application Number:
PCT/CN2018/084549
Publication Date:
October 10, 2019
Filing Date:
April 26, 2018
Export Citation:
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Assignee:
JIANGSU GOLD DRAGON POWER CO LTD (CN)
International Classes:
H02J3/32; H02J3/38
Foreign References:
CN102157978A2011-08-17
CN205231763U2016-05-11
CN106849343A2017-06-13
CN102738836A2012-10-17
US20140203649A12014-07-24
CN108649602A2018-10-12
Attorney, Agent or Firm:
BEIJING UTC LIANFENG INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) et al. (CN)
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