Liu Xinyuan

Research of over-voltage in air-core reactor based on waveform relaxation

With the increasing voltage class of power equipment, the turn number of winding equipment becomes more great and the coupling between the turns becomes stronger. As a result, it is difficult to solve circuit equation by analytical algorithm. This paper provides a method using waveform relaxation (WR) to solve the circuit equation. This method could be applied in calculation of complex computation, such as turn- to-turn voltage calculation of winding equipment and flow calculation of big power grid. Before calculation, this paper provide a method to calculate electromagnetic parameters of an air-core reactor. At last the paper presents a calculating example and experiment. From the experiment, the method provided in this paper proves its veracity and superiority.

Research on grid-connected and economy of distributed wind power generation

This paper introduced several types of distributed wind turbines, discussed the impact on grid-connected and put forward the measures. Combined with the wind data in Shanghai area, economy of the currently used widely distributed wind power generator was calculation. The results show that, the distributed wind power generator had better stability and economy, suitable for application in the surrounding areas of the city.