Discussion on strategy of stabilizing high proportion of renewable energy power fluctuation

Abstract

The power fluctuation of power system with high proportion of renewable energy and its access have caused a huge challenge to the safe and reliable operation of the power grid. What kind of method should be adopt to stabilize the power fluctuations of renewable energy generation and what to do to ensure the safe and economic operation of power grid have become the focus of research in the world. On the basis of the detailed investigation and study over the power fluctuation of renewable energy based on wind and solar energy, high energy consumption load regulation characteristics, as well as natural gas and oil pipeline network characteristics, this paper puts forward the general idea about stabilizing the high proportion of renewable energy power fluctuation in China. The idea considers the conentrated renewable energy and the distributed renewable energy. First, considerding the concentrated renewable energy. Combined with the characteristics of China’s energy resource development and load distribution, a strategy of transferring high energy consumption load from eastern region to western and northern regions where renewable energy are developed centrally is put forward in this paper. The high energy consumption load such as electrolytic aluminium which was thought had no contribution to the satability of frequency before have developed a new role in this paper. The potential power regulation capability of high energy consumption load is developed to achieve the partly in-situ consumption and the stabilization of fluctuations of the large-scale renewable energy power generation. On the other hand, considering the distributed renewable energy. The method by combining power grid with natural gas pipeline network and oil pipeline network at the receiving-end of power grid of renewable energy distributed utilization is proposed to build the household and commercial hybrid energy system. This system mentioned above can achieve the stabilization of power generation fluctuation at the receiving-end of the power grid. The concept of combing power grid with natural gad pipeline nerwork and oil pipeline network is novel. On this basis, a detailed explanation of the principle of stablizing the concentrated renewable energy power generation fluctuation at the sending-end of the power grid and the principle of stablizing the distributed renewable energy power generation fluctuation at the distribution network side are given in this paper. To improve the effectiveness of this method, the regulation capacity of the two ways to stabilize renewable energy power fluctuation with different development mode of renewable energy in 2020 and 2030 is evaluated in this paper. The result turns out that by transferning the power regulation capability of high energy consumption load to stable the concentrated renewable energy power generation fluctuation at the sending-end of the power grid and combining power grid with natural gas pipeline network and oil pipeline network to stable the distributed renewable energy power generation fluctuation at the distribution network side, the power system with high proportion of renewable energy would be in safe operation.