Double-grid-connected interface medium-voltage photovoltaic power generation system with SOP function

A technology of photovoltaic power generation system and interface circuit, applied in the field of power system, can solve problems such as limited capacity

Active Publication Date: 2021-03-02
QINGDAO UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The embodiment of the present invention provides a medium-voltage photovoltaic power generation system with dual grid-connected interfa

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  • Double-grid-connected interface medium-voltage photovoltaic power generation system with SOP function
  • Double-grid-connected interface medium-voltage photovoltaic power generation system with SOP function
  • Double-grid-connected interface medium-voltage photovoltaic power generation system with SOP function

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Embodiment Construction

[0082] The following description and the accompanying drawings sufficiently illustrate specific embodiments herein to enable those skilled in the art to practice them. Portions and features of some embodiments may be included in or substituted for those of other embodiments. The scope of the embodiments herein includes the full scope of the claims, and all available equivalents of the claims. Herein, the terms "first", "second", etc. are only used to distinguish one element from another element without requiring or implying any actual relationship or order between these elements. In fact the first element can also be called the second element and vice versa. Furthermore, the terms "comprising", "comprising" or any other variation thereof are intended to cover a non-exclusive inclusion such that a structure, means or apparatus comprising a series of elements includes not only those elements but also other elements not expressly listed elements, or also elements inherent in the ...

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Abstract

The invention belongs to the field of power systems, and discloses a double-grid-connected interface medium-voltage photovoltaic power generation system with an SOP function. The double-grid-connectedinterface medium-voltage photovoltaic power generation system comprises two photovoltaic arrays and two grid-connected interface circuits, wherein the photovoltaic arrays are connected with the tailend of a first medium-voltage feeder line through the first grid-connected interface circuit, and are connected with the tail end of a second medium-voltage feeder line through the second grid-connected interface circuit; and the first grid-connected interface circuits control the active power output to the first medium-voltage feeder line, and the second grid-connected interface circuit controlsthe voltage of each direct-current bus. On the basis of the structure of the photovoltaic power generation system based on a modular multilevel converter, the novel photovoltaic power generation system with two grid-connected interfaces is provided, so that the photovoltaic power generation system has an SOP function, the advantages that the SOP significantly improves the flexibility of operationand scheduling of a power distribution network and greatly improves the economy and reliability of operation of a power system are brought into play, the power flow flexibility of the photovoltaic power generation system is improved, and the distributed photovoltaic accepting capability of the power distribution network is improved.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a medium-voltage photovoltaic power generation system with dual grid-connected interfaces and SOP function. Background technique [0002] Energy is the basis for sustainable economic and social development, and an indispensable power guarantee for human production and life. As issues such as energy security, ecological environment, and climate change become increasingly prominent, accelerating the development of new energy has become a common consensus and concerted action by the international community to promote energy transformation and development and respond to global climate change. As an important part of new energy, photovoltaic power generation is gradually developing from large-scale centralized grid-connected to distributed grid-connected. [0003] A large number of distributed power sources connected to the distribution network can bring a series of benefits su...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/46H02J3/26H02M5/458
CPCH02J3/381H02J3/466H02J3/26H02M5/4585H02J2300/24H02J2300/40Y02E10/56Y02E40/50Y02A30/60
Inventor 由蕤李立伟江加辉郑晓钦
Owner QINGDAO UNIV
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