考虑热网特性的热电联合系统热源规划方案研究

he rapid growth of wind capacity has caused curtailment of wind resources in some areas with sufficient wind energy and it is becoming an urgent task to improve the utilization rate of wind power. The mathematical modelling of heating systems is firstly established in this paper and then it is applied to analyze the effects of the delay characteristic of heating pipelines on minimizing curtailment of wind power. The technological and economic indicators of different types of heat sources are also analyzed in order to identify the demand of heat sources capacity in different periods of heating seasons. Planning models of combined heat and power systems are established according to corresponding planning objectives and used in obtaining the revenue of systems and the utilized rate value of wind power. The results of case studies show that the delay characteristic of heating pipelines in some periods of heating seasons has little effect on the reduction in curtailment of wind energy because of the lack of adjustable space to cogeneration units. The curtailed wind power cannot be entirely consumed because the capacity of storage tanks is limited to a maximum value due to the power output of cogeneration units. Electric boilers can totally utilize the curtailed wind power when their capacity is enough although the revenue of systems can decline, after a period of increase, as the amount of wind resources curtailment decreases. The capacity of heat sources varies by different planning methods of combined heat and power systems.?????