利用建筑物与热网热动态特性提高热电联产机组调峰能力

摘要

The combined heat and power (CHP) operation mode considering the dynamic thermal performance of buildings and district heating pipelines network is proposed to solve the lack of peak load regulation capacity of CHP units.The problem of power determined by heat operation mode is solved.The composition of the CHP system based on the dynamic thermal performance of buildings and pipelines is described in detail.Changes of the electric power and heat operation points of CHP units are compared with or without considering the dynamic thermal performance of the buildings and pipelines.The mechanism of improving the peak load regulation capacity is given.The CHP dispatch model considering the dynamic thermal performance of both buildings and pipelines is also given.Simulation results demonstrate that the proposed model can significantly improve the upward and downward regulation capacity of CHP units,which is better than the model considering the dynamic thermal performance of only buildings or only pipelines.In addition,the characteristic of the heat and power coupled at the source side is extended to the load side.Furthermore,the heat and power of CHP units can be decoupled by coordinated control of sources and loads.%提出了综合考虑建筑物与集中供热管网热动态特性的热电联合运行模式,解决了因传统"以热定电"运行模式而导致的热电联产机组调峰能力不足的问题.详细介绍了基于建筑物与热网热动态特性的热电联合系统的构成方案;着重对比分析了考虑建筑物与热网热动态特性前后的热电联产机组运行点的变化情况,在此基础上明确了其能够提高机组调峰能力的机理;给出了综合考虑建筑物与热网热动态特性的热电联合调度模型.算例结果表明,所述综合模型可以显著提高机组的上调节和下调节容量,其效果优于仅考虑建筑物或者热网单一环节热动态特性的模型.进一步,将系统源侧"热电耦合"特性扩展到荷侧,利用系统"源荷协调控制"实现了机组"热电解耦".