A microgrid grid-connected device
A technology of micro-grid and large-scale power grid, applied in the direction of single-network parallel feeding arrangement, etc., can solve the problems of complicated wiring, large floor space, and low degree of intelligence, and achieve the effects of improved reliability, convenient wiring, and small space
Active Publication Date: 2016-08-17
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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Problems solved by technology
At present, most of the microgrid point of common coupling (referred to as PCC) switches are only focused on the realization of the fast switching function of the PCC switch when the microgrid is switched between off-grid and off-grid operation modes, and the degree of intelligence is not high.
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[0041] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.
[0042] figure 1 A structural diagram of the microgrid grid-connected device in this embodiment is shown.
[0043] like figure 1 As shown, the microgrid grid connection device includes a controllable switch 101 , a signal acquisition circuit 102 , a signal conversion circuit 103 , a controller 104 and a switch drive circuit 105 . In this embodiment, all components of the microgrid grid-connected device are ...
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The invention discloses a micro-grid connection device. The device comprises a controllable switch, a signal acquisition circuit and a controller, wherein the controllable switch is electrically connected between a micro-grid and a large power grid and is used for connecting or disconnecting the micro-grid and the large power grid according to an on-off signal, the signal acquisition circuit is used for colleting electric signals of the micro-grid, the large power grid and the controllable switch, the controller is electrically connected between the signal acquisition circuit and the controllable switch, is used for generating the on-off signal according to the electric signals of the micro-grid, the large power grid and the controllable switch, and can control on and off of the controllable switch so as to realize connection and disconnection of the micro-grids. The micro-grid connection device has a simple structure, is convenient to wire, can efficiently, reliably and rapidly switch between connection and disconnection of the micro-grids, and can effectively guarantee the safety of maintenance workers and the security of electric equipment of the micro-grid and the large power grid.
Description
technical field [0001] The invention relates to the technical field of distributed power generation, in particular to a microgrid grid-connected device. Background technique [0002] Energy and environmental issues are important factors related to the sustainable development of society and economy. At present, fossil energy such as coal and petroleum occupies a large proportion in the global energy structure. Facing the dual pressure of energy crisis and environmental protection, new energy has been developed and utilized more and more widely. [0003] In recent years, the proportion of new energy power generation such as photovoltaics and wind power in the traditional grid capacity has been increasing. It is estimated that the world's total photovoltaic power generation will account for 1% of the world's total energy demand in 2020 and 20% in 2050. However, with the development of new energy power generation, the impact of the volatility of these new energy sources on larg...
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IPC IPC(8): H02J3/38
Inventor 李建泉蹇芳吴小云程宇旭翟文杰万运琪袁斌
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST