Solar grid-connected power generation system and control method thereof

A technology for grid-connected power generation and solar energy, applied in photovoltaic power generation, renewable energy integration, single-grid parallel feeding arrangement, etc., can solve the problems of difficult management, difficulty in grid-connected power generation, and high cost of battery energy storage

Active Publication Date: 2013-12-18
孙祯
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Problems solved by technology

[0002] At present, there are many defects in the use of photovoltaic power generation, which makes it difficult to connect to the grid for power generation. The main reason is that the power generation in cloudy and rainy weather is very un

Method used

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  • Solar grid-connected power generation system and control method thereof
  • Solar grid-connected power generation system and control method thereof

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Embodiment Construction

[0013] see figure 1 It can be seen that the solar grid-connected power generation system is mainly composed of a solar power station 1, a controllable rectifier 2, an inverter 3, an auxiliary power supply unit 4, and a diode 5. The current generated by the solar power station 1 is transmitted to the inverter 3 through the diode 5, and the auxiliary The power supply unit 4 is an AC power supply or a storage battery, and its output voltage is sent to the controllable rectifier 2. The controllable rectifier 2 outputs a differential voltage and is connected in parallel with the diode 5, and collects the output voltage value of the solar power station 1. The inverter 3 is connected to the grid. Specifically, when the voltage of the solar power station 1 fluctuates, the resulting differential voltage is sent to the control circuit of the controllable rectifier 2 by the auxiliary power supply unit 4, and when the voltage of the solar power station 1 drops, the voltage of the controlla...

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Abstract

The invention discloses a solar grid-connected power generation system. A power generation current of a solar power station flows through a diode to be transmitted to an inverter, an auxiliary power supply unit outputs a voltage to a controllable rectifier which is connected with the diode in parallel, an output voltage value of the solar power station is collected, and the inverter is connected with a power grid. The solar grid-connected power generation system is a device which effectively utilizes solar energy to generate power and supply energy in a photovoltaic mode, solar devices are installed on all households in cities and counties meeting requirements and various buildings to generate power in the photovoltaic mode, 30%-40% clean energy can be generated, the solar grid-connected power generation system is an effective method for achieving energy safety and eliminating PM2.5 main pollutants and is an important measure for effectively utilizing photovoltaic capacity.

Description

technical field [0001] The invention relates to a power generation device, in particular to a solar distributed power generation device and a solar isolated grid power generation system. Background technique [0002] At present, there are many defects in the use of photovoltaic power generation, which makes it difficult to connect to the grid for power generation. The main reason is that the power generation in cloudy and rainy weather is very unstable, and it is very difficult to connect to the grid for power generation. The cost of energy storage with batteries is high and management is difficult, which makes the development of solar power generation are greatly restricted. Contents of the invention [0003] The technical problem to be solved by the present invention is to realize a solar power generation system capable of effectively and efficiently utilizing solar photovoltaics for grid-connected power generation, ensuring sustainable development of photovoltaic power ...

Claims

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Application Information

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IPC IPC(8): H02J3/38
CPCY02B10/10Y02E10/56
Inventor 孙祯王大文
Owner 孙祯
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