Power Quality Analysis of the Zhangjiakou Regional Network in China

Zhangjiakou regional network belongs to the Jibei power grid in Northern China and locates at the midway of the power transmission corridor from Inner-Mongolia to the rest of Jibei power grid. Zhangjiakou regional network consists of several area networks connected to the main network through 500kV stations. In recent years, renewable energy in rural areas has developed rapidly and electrified railway traffic traction in urban areas is developing rapidly, which cause a significant impact on the power quality of the power supply system and even the main transmission network. In this paper, harmonic standards for power system planning in China are introduced firstly. Then the parameters of the minimum operation mode and the power supply capacity in harmonic planning are discussed. With the present standards, the determination principles and calculation procedures of the two parameters are proposed, to deal with the rapid development of the power grid.