从用户的利益出发，在边际电量成本中，考虑了边际缺电成本。应用边际定价理论，给出了分级定价的数学模型。
Then from users' welfare, marginal outage cost (MOC) is discussed in energy cost and point out the model of priority pricing depended on the theory of marginal pricing.
电价实行统一政策，统一定价原则，分级管理。
The electricity price shall be based on the principle of uniform policy, unified pricing and be regulated at different levels.
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