New energy photovoltaic power generation system grid connection circuit
A photovoltaic power generation system and new energy technology, applied in photovoltaic power generation, AC network circuits, circuit devices, etc., to achieve the effects of high power efficiency, wide input voltage range, and low switching loss
Inactive Publication Date: 2015-03-25
STATE GRID CORP OF CHINA +3
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Problems solved by technology
However, if the technology fails to meet the requirements, the harm to the entire grid caused by reluctant grid connection is immeasurable
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Embodiment 2
[0037] Such as figure 2 As shown, the grid-connected circuit of the new energy photovoltaic power generation system also includes a photovoltaic panel maximum power tracking device. It can monitor the voltage of the power generation process in real time to ensure that the electric energy in the power grid is efficient, safe and reliable.
[0038] The maximum power detection and tracking device for photovoltaic panels includes a first filter capacitor 14, a first boost inductor 8, a second auxiliary inductor 9, a first power switch tube 16 and a second power switch tube 17; One end of a filter capacitor 14 is connected to one end of the first boost inductor 8, and the other end of the first boost inductor 8 is connected to the emitter of the first power switch tube 16. The first power switch tube 16 The collector is connected to the other end of the first filter capacitor 14, the other end of the first boost inductor 8 is also connected to one end of the second auxiliary inducto...
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The invention discloses a new energy photovoltaic power generation system grid connection circuit. The new energy photovoltaic power generation system grid connection circuit comprises a three-phase inverter bridge and further comprises a first power diode, a third auxiliary inductor, a seventh power diode, a fourth auxiliary inductor, a second power diode, a second filter capacitor, a third power diode, a fifth auxiliary inductor, a fourth power diode, a fifth power diode, a sixth power diode and a sixth auxiliary inductor; the anode of the first power diode is connected with one end of the third auxiliary inductor. The new energy photovoltaic power generation system grid connection circuit has the advantages that switching losses are few, conversion efficiency is high, and meanwhile the adapted input voltage range is wide; output maximum power point tracking control can be conducted on a photovoltaic cell panel, so the power generation process and voltage of the photovoltaic cell panel is monitored in real time, and high efficiency, safety and reliability of electric energy input a power grid are ensured.
Description
Technical field [0001] The invention relates to a grid-connected circuit of a new energy photovoltaic power generation system. Background technique [0002] At present, China has become the world's largest energy consumer and as the world's largest carbon dioxide emitter. Although China's per capita emissions are lower than the United States, Japan and the European Union, China will face increasing international pressure. At the same time, the global energy crisis is getting worse, and the exploitation and use of energy has accelerated the deterioration of the human living environment. Mankind must develop the economy under the dual constraints of limited resources and environmental protection requirements. Vigorously developing the new energy industry will be one of the important breakthroughs for China to solve energy and environmental problems and fulfill its commitments to the international community. [0003] In addition, the current global power supply system is a centraliz...
Claims
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IPC IPC(8): H02J3/38
CPCH02J3/383H02J3/385Y02E10/56
Inventor 汤少卿尤鋆闻俊蔡林君
Owner STATE GRID CORP OF CHINA