Abstract: The operation mode of“ Setting Electricity by Heat”taken by the Three-North Region in China during heating seasons is one of the important causes for the wind power abandoning. The utilization rate of wind power can be improved by taking heat storage electric boilers.Combining distributed heat storage and phase change heat storage technologies can give full play to their advantages of flexible matching，high heat storage efficiency and fast response.To increase the annual return of distributed phase change heat storage stations，the economy analysis of distributed phase change heat storage stations based on urban functional zoning is made，while considering the heat storage constraint，heating constraint and combined heating constraint.The analyzing results show that the annual returns of heat storage stations are affected by the characteristics of the regional heat load. According to the law of marginal benefits，the annual return of a heat storage station in commercial area will be maximized with 13 200 kW·h capacity and 10 800 kW heating power，and that in a residential area will peak with 11 200 kW·h capacity and 9 000 kW heating power. With the selected capacity and heating power，the station can reach the break-even point with the electricity price of 0.218 Yuan/（kW·h）in the commercial area and 0.221 Yuan/（kW·h）in the residential area respectively

Key words: distributed phase change heat storage station, urban functional area, distributed heat storage, phase change heat storage, capacity optimization, marginal benefit, economic, renewable energy, wind power abandoning