“厂网分开、竞价上网”是政府主导电力市场化改革的战略选择。在厂网分开后的初期必然会出现单一购电者的市场模式,电网经营企业既是系统运行机构,又是单一购电机构。而单一购电机构阶段持续时间的长短将取决于开放大用户选择发电商的早晚。国发[2002]5号文件明确指出“十五” “The separation of factory network, bidding for the Internet” is the government’s leading power market-oriented reform strategy. In the early days after the separation of the factory network will inevitably be a single buyer’s market model, power grid operators both system operators, but also a single power purchase agencies. The duration of a single purchase agency phase will depend on the length of the open large users choose the power generation business sooner or later. Guo Fa [2002] No. 5 document clearly states that “the Tenth Five-year Plan”