Wind, solar and other new energy generation are intermittent and fluctuating, so they need to be coordinated to ensure safe and stable operation after they are connected to the grid.
On the one hand, the large-scale grid connection of new energy requires the grid to continuously improve its adaptability and safety and stability control capability, which is mainly reflected in the following: grid dispatching needs to coordinate all kinds of power generation resources in the network, so that the power supply and demand of the network can achieve immediate dynamic balance and meet the safety operation standards; grid planning needs to carry out grid optimization work, through determining the reasonable grid structure of large-scale new energy base and power supply structure at the delivery end, to achieve The transmission link needs to adopt high-voltage AC/DC transmission technology to improve the transmission capacity of the grid and reduce transmission power loss.
On the other hand, in order to reduce the security and stability risks of wind and solar power, new energy generation needs to have basic access and control requirements. The smart grid has specific requirements on active power control, power prediction, reactive power, voltage regulation, low voltage ride-through, operating frequency, power quality, models and parameters, communication and signals, and grid access testing for wind and solar power plants, to solve the problems of standardized access, accurate power prediction and operation of intermittent power sources. In order to realize the scientific and rational utilization of large-scale new energy sources, the following problems have been solved
