中文摘要：

我国发电装机容量已超过8亿kW，但是有些地区仍然尖峰时刻发电供应不足．低谷时段发电冗余。发电供应不足时启动的都是高耗能、高污染小机组．对节能减排非常不利。通过供电公司与用户之间签订合同，可以把可中断负荷的用户作为一种虚拟电厂，当系统备用容量不足时，启动虚拟电厂．即按照合同中断对该用户的部分电力供给：而当负荷低谷时启动虚拟电厂即按照合同增加电力需求．但需要给用户一定的电价补偿。虚拟电厂补偿电价的确定既要有利于发电机组调度过程中的节能和减排．又要保护供电余业的购售电利益．还要有利于激励用户减少高峰负荷用电的积极性．基于上述目的构建用户侧“虚拟电厂”对发电产业节能减排影响的分析模型，可以为虚拟电厂的实际有效运行提供理论分析基础．

英文摘要：

China＇ s installed generation capacity has exceeded 800 million kilowatts. But for some regions, generation capacity is in short supply with peak load period and is redundancy with valley load period. During peak load period, generation units with high energy consuming and high polluting emission usually are operated, it is not helpful to energy-saving and pollution emission reducing. Nominal power plants can solve this problem. By designing a contract between power supply companies and consumers, consumers with intcrruptible load can be considered as a nominal power plant. When system＇ s standby capacity is not enough, the nominal power plant is started up, i.e. part load of consumers will be interrupted, but some price compensation should be given to consumers, and compensation pricing should be helpful to save energy and control emission for power generation, and protect the power supply company＇ s benefit in the process of buying and selling electricity, and prompt consumers to decrease electricity in peak time. The analysis models based on the purposes above were given, and a theoretical basis for effective operation of nominal power plants was established.