1. Basic contents of photovoltaic power generation system in photovoltaic engineering:
Photovoltaic power generation system is divided into off-grid photovoltaic system and grid-connected photovoltaic system. Off-grid photovoltaic power plants include village power supply system, solar household power supply system, communication signal power supply, cathodic protection, solar street lamp and other photovoltaic power generation systems with independent batteries. An example of a photovoltaic power generation grid-connected photovoltaic power generation system is a photovoltaic power generation system that is connected to a power grid and transmits power to the power grid. It can be divided into grid-connected power generation systems with and without batteries. Grid-connected power generation system with storage battery is schedulable, can be integrated into or withdrawn from the power grid as required, and also has the function of standby power supply, which can provide emergency power supply when the power grid fails for some reason. Photovoltaic grid-connected power generation systems with storage batteries are often installed in residential buildings; Battery-free grid-connected power generation systems do not have the functions of schedulability and standby power supply, and are generally installed on larger systems.
2. The impact of photovoltaic engineering on the ecological environment.
Large-scale ground photovoltaic engineering may lead to ecological deterioration. The sunshine conditions in northwest China are excellent in the whole country and even in the world. The annual average sunshine time is 3100-3,600 hours, and the annual total radiation can reach 7,000-8,000 mj/m2, which are the unique conditions for building large-scale photovoltaic power plants. In 2007, Qinghai Province took the lead in developing solar photovoltaic industry on a large scale.
Ecological environment is the foundation of human society, but environmental pollution has been neglected in the photovoltaic engineering project, which means that in the history of human civilization, industrial output value and environmental pollution index are accompanied by each other, and the law of synchronous rise will be replicated in the northwest.
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