The authors present 3 design methods of CNG injection station and make a decision of importing the key equipment and self-made auxiliary equipment based on economic analysis.
提出了3种加气站设计方案，通过经济分析，确定了进口关键设备、辅助设备国产化的加气站设计方案。
2
Reactive power service is a key part of power market auxiliary service, and reactive power price in the generation side is the basis of the pricing of reactive power market.
无功功率服务是电力市场辅助服务的一个重要组成部分，而发电厂的无功电价又是整个无功市场定价的基础。
3
Its key proof is to construct an auxiliary function, which is used by Roll's theorem to reach a conclusion of Lagrange's theorem.