告首先介绍了Xcel电力公司的基本情况，值得一提的是，该公司是最大的风电供应商。报告给出了2020年西部互联电网的风电和太阳能发电容量、可再生能源比例等数据，并提出了发展电能不平衡市场（Energy Imbalance Market，EIM）的建议。随着大量可再生能源的接入，整个电网需要越来越多的负荷跟踪备用。-Report Xcel first introduced the basic situation of the power companies, it is worth mentioning that the company is the largest supplier of wind power. 2020 report shows the western interconnected grid of wind power and solar power generation capacity, the proportion of renewable energy sources such as data, and proposed the development of energy imbalance in the market (Energy Imbalance Market, EIM) recommendations. With access to a large number of renewable energy, the entire grid load following requires more and more spare.