摘要
传统的热电联合调度中电、热负荷时刻平衡,限制了热负荷高峰期系统调峰能力,导致弃风现象高发。鉴于此,考虑了热电联合系统的实际物理模型,利用热网储放热特性和供热区域热惯性消纳弃风,提出改进的热电联合调度策略。以系统煤耗量最小为目标函数,考虑系统常规约束和热力系统模型约束,将传统热负荷实时平衡约束条件替换为把室内温度维持在期望范围内,并增加散热器的散热量作为优化控制变量,基于改进调度策略进行日前调度。算例分析结果表明,计及热网储热和供热区域热惯性的改进调度策略可以提高系统的经济性和消纳弃风能力。
In traditional combined heat and power dispatching, demand for real-time balance of electric and heat load limits peak shaving capacity of generating unit during peak period of heat load, resulting in frequent occurrence of wind power cuitailment. In view of this, actual physical model of combined heat and power system is analyzed in this paper. By using heat storage and release characteristics of heating network and thermal inertia of heating area, an improved combined heat and power dispatching strategy is proposed to promote wind power consumption with minimum coal consumption as objective function. Considering conventional system constraints and heat system model, traditional heat load real-time balance constraint is replaced by maintaining indoor temperature within expected range, and increasing heat dissipation of radiator as an optimization control variable. A day-ahead dispatching strategy is carried out. Simulation result shows that the improved dispatching strategy considering heat storage characteristics of heating network and thermal inertia in heating area can improve economical performance of the system and accommodation ability of otherwise curtailed wind power.
作者
仪忠凯
李志民
YI Zhongkai;LI Zhimin(School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, Heilong3iang Province, China)
出处
《电网技术》
EI
CSCD
北大核心
2018年第5期1378-1384,共7页
Power System Technology
关键词
热电联合调度策略
消纳弃风
电力调峰
热惯性
combined heat and power dispatching strategy
wind power accommodation
electric peak-shaving
thermal inertia
