Research on Effect of Wind Power Accommodation by Synergistic Operation Based on Electric Boiler and Heat Accumulator

Abstract

With rapid development of wind power, on the one hand it reduces our reliance on fossil fuels and reduces environmental pollution, but on the other hand causes various issues related to power grid restructuring. Lots of wind power curtailment is one of these problems for high proportion of the generating capacity of northeast China based on combined heat and power (CHP) units whose cannot flexibly response to the peak regulation of power grids. Therefore the paper discussed economic benefits of accommodating wind power based on electric boilers and heat accumulators with CHP units. Electric boilers can directly consume curtailment wind power to supply heat during low load periods and thus mitigate the heat supply stress of CHP units. Heat accumulators can store heat during high load periods and supply heat during low load periods and decouple the constraint of forced power output determined by heat of CHP units. From analysis some factors such as average operation hours per year of electric boilers and heat-to-electric ratio of CHP units obviously influence economic benefits.