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Uninterruptible automatic-switchover control system for photovoltaic power supply and electric supply

A technology of photovoltaic power generation system and control system, applied in photovoltaic power generation, emergency power supply arrangement, electrical components and other directions, can solve the problems of difficult design specifications and achieve the effect of uninterrupted power supply

Inactive Publication Date: 2013-12-11
FENGGANG COUNTY QIANBEI NEW ENERGY
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Problems solved by technology

However, for some township hospitals, it is difficult to achieve the corresponding design specifications due to limited conditions.

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  • Uninterruptible automatic-switchover control system for photovoltaic power supply and electric supply

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[0013] detailed description A photovoltaic power generation system is a power generation system that uses solar cells to directly convert solar energy into electrical energy. Its main components are solar cells, batteries, controllers and inverters. It is characterized by high reliability, long service life, no pollution to the environment, independent power generation and grid-connected operation. It is favored by enterprises and organizations in various countries and has broad development prospects. Photovoltaic power generation products are mainly used in three aspects: one is to provide power for no electric field; the other is solar daily electronic products, such as various solar chargers, solar street lights and various lamps for solar grassland; the third is grid-connected power generation, This has been implemented on a large scale in developed countries, but in China, grid-connected power generation has not yet been fully promoted, and it is only implemented i...

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Abstract

The invention relates to an uninterruptible automatic-switchover control system for a photovoltaic power supply and an electric supply. When the control system is started, whether an electric supply system is normal or not is firstly judged, and if the electric supply system is normal, a photovoltaic power generation system is kept in a disconnection state; if the electric supply system is judged to have fluctuation and a fluctuation range exceeds a preset value, emergency accidents possibly happen, the control system disconnects the electric supply system, the photovoltaic power generation system is started, and an emergency power supply is switched on; if the electric supply system is judged to be in a power-off state, the control system disconnects an electric supply grid, an uninterruptible power system UPS and a hospital internal grid are still in a switch-on state, power is stilled supplied to the internal grid, the control system starts a switchover switch at the same time, and the photovoltaic power generation system is switched on. The uninterruptible automatic-switchover control system effectively integrates the photovoltaic power generation system, the electric supply system and an emergency power supply system, when the electric supply is suddenly powered off or emergency faults occur, the photovoltaic power generation system can be automatically switched over within a safety time to supply power, and therefore uninterruptible power supply of the important medical care devices of hospitals is achieved.

Description

technical field [0001] The invention relates to a control system for uninterrupted automatic switching between a photovoltaic power source and commercial power. [0002] Background technique [0003] It is clearly stipulated in the "Code for Electrical Design of Civil Buildings": "The first-level load should be powered by two power sources. When one power source fails, the other power source should not be damaged at the same time. The particularly important loads in the first-level load, except the above-mentioned In addition to the two-way power supply, an emergency power supply must be added." For any hospital user who cannot interrupt the power supply under normal or accidental conditions, it belongs to the first-level load unit, and the hospital must provide its own security power supply. For loads that cannot interrupt power supply, a self-contained generator set or EPS emergency power supply should be configured, and for important loads that do not allow instantaneo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J9/06
CPCY02B10/70Y02E10/56
Inventor 邱宇基
Owner FENGGANG COUNTY QIANBEI NEW ENERGY
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