Photovoltaic electric station grid connection capacity optimization and control method based on four-element constraint method

A photovoltaic power station and capacity optimization technology, applied in photovoltaic power generation, photovoltaic modules, light radiation generators, etc., can solve the problems of waste of system resources, inability to determine the maximum access capacity of photovoltaic power stations at access points, and inability to determine grid margins, etc. , to achieve the effect of reducing the design workload

Active Publication Date: 2012-03-21
CEEC JIANGSU ELECTRIC POWER DESIGN INST CO LTD
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Problems solved by technology

The photovoltaic power station grid connection scheme designed according to this method cannot determine the maximum access capacity of the photovoltaic power station that can be accommodated by the access point, and cannot determine the margin of the power grid, which sometimes causes waste of system resources.

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  • Photovoltaic electric station grid connection capacity optimization and control method based on four-element constraint method
  • Photovoltaic electric station grid connection capacity optimization and control method based on four-element constraint method
  • Photovoltaic electric station grid connection capacity optimization and control method based on four-element constraint method

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Embodiment Construction

[0040] According to the formulas (1) to (7), the access capacity G of the photovoltaic power station controlled by the short-circuit ratio is calculated respectively 1 , PV power station access capacity G under voltage loss control 2 , The access capacity of photovoltaic power plants controlled by voltage fluctuation G 3 And the photovoltaic power station access capacity G that allows harmonic injection control 4 , and then take the minimum value of the control capacity obtained from the four elements to obtain the optimal control capacity G of the photovoltaic power station grid-connected capacity opt .

[0041] 1) Calculate the access capacity G of the photovoltaic power station controlled by the short-circuit ratio according to formula (1) 1 , PV power station access capacity G under voltage loss control 2 , The access capacity of photovoltaic power plants controlled by voltage fluctuation G 3 And the photovoltaic power station access capacity G that allows harmonic in...

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Abstract

The invention discloses a photovoltaic electric station grid connection capacity optimization and control method based on four-element constraint method. The method is characterized in that the admitted maximum capacity of photovoltaic electric station by a single access point of the grid is calculated through four aspects of access short-circuit ratio, voltage loss, voltage fluctuation and harmonic wave. The method can ensure the reasonable grid connection of the photovoltaic electric station and the safe and stable operation of the grid. The photovoltaic electric station grid connection capacity optimization based on four-element constraint method is determined on the basis of the demands of grid enterprises power supply quality, technical and economic control indexes of photovoltaic electric station operation and the like. The maximum access capacity determined according to the principle can satisfy the control demand of the grid enterprises for electric energy quality and can alsosatisfy the demand of the operation of the photovoltaic electric station, and the optimization and control method has good directive function for the access planning of a great number of photovoltaicelectric stations.

Description

technical field [0001] The invention relates to an engineering design method for capacity optimization control of a grid-connected photovoltaic power station access system, and belongs to the technical field of intermittent renewable new energy design. Background technique [0002] The development of solar photovoltaic power generation technology began in the 1950s. With the tightening of the global energy situation, solar photovoltaic power generation, as a sustainable energy alternative, has developed rapidly in recent years and has been widely used around the world. Large-scale grid-connected photovoltaic power stations are the inevitable result of photovoltaic power generation moving toward electric power scale applications. Grid-connected photovoltaic power stations at home and abroad are developing from small and medium-sized to large-scale. Due to its own unique power generation principle, solar photovoltaic power stations will have different impacts on the power sys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02N6/00H02J3/01H02S40/30
CPCY02E10/563Y02E10/56Y02E40/40Y02P80/20
Inventor 许文超钱康谢珍建高松汪辉王震泉牛涛
Owner CEEC JIANGSU ELECTRIC POWER DESIGN INST CO LTD
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