Photovoltaic Power Station

Distributed characteristics of photovoltaic power station.The basic principles of distributed power station: mainly based on the building surface, including rural residents housing roof solar power station and industrial and commercial enterprises roof photovoltaic power station.It is used to solve the problem of user electricity and resource utilization problem, through the grid of power supply difference compensation and delivery, as well as enterprises and residents.

Photovoltaic power generation supply is on the user side, and the power generation supplies the local load, which is regarded as the load, which can effectively reduce the dependence on the state grid for power supply and reduce the line loss.Making full use of the building surface, the photovoltaic cells can be used as building materials at the same time, effectively reducing the floor area of the photovoltaic power station, and creating economic benefits for users.

The effective interface with smart grid and micro grid, flexible operation,  can operate independently under appropriate conditions to reduce the electricity cost of users.The direction of the power current in the distribution network will change timely. Against the power current will lead to additional loss, the relevant protection needs to be reorganized. The transformer tap needs to be constantly changed. With the development of technology, this happens less and less likely.

The difficulty of voltage and reactive power adjustment, the technical control of power factor after the access of large capacity photovoltaic, and the short-circuit power will also increase. With the development of technology, this happens less and less likely.New requirements for secondary equipment and communication, increasing the complexity of the system. At present, with the development and progress of technology, the management of distributed photovoltaic power is more and more perfect, and the defects are less and less obvious.

The characteristics of centralized photovoltaic power station.The basic principle of centralized photovoltaic: make full use of the rich and relatively stable solar energy resources in desert areas, barren hills and collapsed mining areas to build a large photovoltaic power station and water photovoltaic power station, connected to the high-voltage transmission system to supply long-distance load.

The site selection is more flexible. The lighting conditions are better. The stability of photovoltaic power generation has increased, and makes full use of the positive peak regulation characteristics of solar radiation and power load to play the role of peak shifting.

The operation mode is more flexible. Compared with the distributed photovoltaic power stations, it can be more convenient to conduct reactive power and voltage control, and it is also easier to participate in the power grid frequency regulation.Short construction cycle, strong environmental adaptability, high utilization rate of natural conditions, do not need for water (water power conditions), coal (thermal power conditions) transportation and other raw materials guarantee low operation cost, easy for centralized management, small space restrictions.