Grid Connection Mode Of Distributed Photovoltaic Power Station
Mar 02, 2023
A distributed photovoltaic power station refers to a power generation system with a small installed capacity and arranged near the user. It is generally connected to a power grid with a voltage level of 10 kV or lower. The small-scale household rooftop photovoltaic power plants that we usually see are all distributed photovoltaic power plants.
At present, for the application of distributed photovoltaic power plants, the power grid company allows the owners of photovoltaic power plants to adopt three grid-connected settlement methods: self-use, self-use, surplus power online, and complete online.
1. Self-use
Self-generation and self-use means that the power generated by the distributed photovoltaic power station is used by the power generation company itself. This model is suitable for manufacturing enterprises that need long-term and lasting electricity consumption. The demand on the electricity side is relatively large, and it can fully or mostly consume the electricity generated by photovoltaic power plants. In order to avoid power reverse transmission, it is necessary to configure an anti-backflow device to alarm, and the inverter adjusts the capacity according to the received signal.
The advantage of the self-use and grid-connected mode is that it is relatively independent, and it has very obvious economic benefits for enterprises with large electricity demand. This grid-connected mode can also be selected for areas where power transmission is limited or where photovoltaic power generation is not supported on the grid.
2. Spontaneous self-use and surplus electricity connected to the Internet
Spontaneous self-use and surplus electricity connected to the grid means that the enterprise only uses a part of the power generated by the distributed photovoltaic power station, and sells the remaining electricity to the grid company. This mode is suitable for enterprises with small electricity demand in production. For such enterprises, the most ideal grid-connected mode is self-consumption and surplus electricity being connected to the grid. After all, while the enterprise enjoys clean and low-cost green electricity, the remaining part is then sold to the grid company for corresponding profits, killing two birds with one stone.
3. Fully Internet
Fully connected to the grid means that the power generated by the distributed photovoltaic power station is directly connected to the grid company, and the electricity used by the enterprise is obtained from the grid. This grid-connected model is the most mainstream and simplest in the past ten years. After all, the subsidies in various places have been relatively strong in the past. For enterprises, while enjoying the original electricity price, the extra electricity price income of the power station is also very considerable.
In the application process of the grid-connected mode of distributed photovoltaic power plants, enterprises need to analyze specific issues, and choose according to the installed capacity of photovoltaic power plants, power generation, the company's own power consumption, power cycle, local policies, local electricity prices, etc. The way that suits you best.
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