Distribution type photovoltaic grid-connected power generation system
A distributed photovoltaic and grid-connected power generation technology, applied in photovoltaic power generation, single-network parallel feeding arrangement, etc., can solve the problems of power quality, security and stability threats to the power grid, poor expansion ability, complex structure, etc., to achieve simple structure, power generation Increased capacity and low cost
Inactive Publication Date: 2012-10-10
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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However, because photovoltaic power generation itself is different from the random and intermittent characteristics of conventional power sources, its grid-connected operation poses a certain threat to the power quality and safety and stability of the grid.
At the same time, most of the current photovoltaic grid-connected power generation systems have shortcomings such as complex structures and poor expansion capabilities, which can no longer meet the needs of modern economic development.
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[0011] The present invention will be further described below in conjunction with accompanying drawing.
[0012] see figure 1 , the distributed photovoltaic grid-connected power generation system of the present invention includes n grid-connected power generation units 1 and n grid-connected inverters 2 corresponding to each other one by one, n≥2 and n is a positive integer, each grid-connected power generation unit 1 is connected to the AC grid 3 through the corresponding grid-connected inverter 2, where:
[0013] Any grid-connected power generation unit 1 includes m photovoltaic arrays 11 and m photovoltaic combiner boxes 12 in one-to-one correspondence with each other, and a DC power distribution cabinet 13, m≥1 and m is a positive integer; each photovoltaic array 11 is connected to The corresponding photovoltaic combiner box 12 is connected to the input end of the DC power distribution cabinet 13, and the output end of the DC power distribution cabinet 13 is connected to t...
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The invention discloses a distribution type photovoltaic grid-connected power generation system which comprises n grid-connected power generation units and n grid-connected inverters, n is more than or equal to 2 and is a positive integer, each grid-connected power connection unit is accessed into an alternate current power grid by the corresponding grid-connected inverter, wherein each of the grid-connected power generation units comprises m photovoltaic arrays, m photovoltaic combiner boxes and a direct current power distribution cabinet, m is more than or equal to 1 and is a positive integer; each photovoltaic array is connected with the input end of the direct current power distribution cabinet by the corresponding photovoltaic combiner box; and the output end of the direct current power distribution cabinet is connected with the grid-connected inverter corresponding to the grid-connected power distribution unit. The distribution type photovoltaic grid-connected power generation system has a simple structure, is easy to implement, can be configured according to different power requirements, has excellent expansibility, and can play an active role in electricity quality and safety and stability of the power grid.
Description
technical field [0001] The invention relates to a distributed photovoltaic grid-connected power generation system. Background technique [0002] At present, photovoltaic grid-connected power generation is the main development trend of solar photovoltaic applications, and various photovoltaic grid-connected power generation systems have emerged as the times require, playing a prominent role in sustainable economic and social development and environmental protection. However, because photovoltaic power generation itself is different from the random and intermittent characteristics of conventional power sources, its grid-connected operation poses a certain threat to the power quality and safety and stability of the grid. At the same time, most of the current photovoltaic grid-connected power generation systems have shortcomings such as complex structures and poor expansion capabilities, which can no longer meet the needs of modern economic development. Contents of the inventi...
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IPC IPC(8): H02J3/38
CPCY02E10/563Y02E10/56
Inventor 姚建歆周曞昕郑季伟徐剑顾临峰李志龙王国友倪东海程正敏唐海强王飙徐刚周静
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO