摘要
电力市场的引入使传统的经济调度模型无法满足当前调度需求,由此在市场竞争中引入需求响应机制,使其协调发电机组与负荷完成经济调配,保证系统稳定并最大化经济效益。基于上述的背景,本文对相关问题作了如下的研究:首先,文中介绍了传统模式下的经济调度模型,以线性化的发电机成本函数最小为优化目标,考虑功率平衡及线路安全约束等条件建立模型,以三机三节点系统进行求解分析。其次,在考虑将可中断负荷作为系统备用的前提下,将其等效为发电厂中的虚拟机组,并参照常规机组的模型对其建模。最后,在传统经济模型的基础上,加入可中断负荷,以可中断负荷与机组成本之和最小为优化目标,更新了约束条件,并根据可中断负荷定义对先前算例进行故障模拟,由求解结果分析可中断负荷对经济调度的影响。综上,通过建模与算例分析,本文得出,引入需求响应使系统调度更加灵活,增强了需求侧弹性与系统稳定性。
The introduction of the electricity market makes the traditional economic dispatching model unable to meet the current dispatching requirements,thus introducing a demand response mechanism in the market competition,so that it can coordinate the generator set and the load to complete the economic deployment,to ensure the system stability and maximize economic benefits.Based on the above background,this paper has done the following research on related issues:Firstly,the paper introduces the economic dispatching model under the traditional mode.The linearized generator cost function is the optimization target,and the model is established considering the conditions of power balance and line safety constraints.The three-machine three-node system is used to solve the problem.Secondly,considering the use of interruptible load as a system backup,it is equivalent to the virtual unit in the power plant,and it is modeled with reference to the model of the conventional unit.Finally,on the basis of the traditional economic model,the interruptible load is added,and the sum of the interruptible load and the unit cost is minimized.The conditional constraints are updated,and the fault is simulated according to the definition of the interruptible load.The results analyze the impact of interrupted load on economic dispatch.In summary,through modeling and example analysis,this paper concludes that the introduction of demand response makes system scheduling more flexible,and enhances demand side elasticity and system stability.
作者
李硕
Li Shuo(Kunming Power Supply Company of Yunnan Electric Power Corporation,Kunming 650011,China)
出处
《云南电力技术》
2024年第1期50-56,共7页
Yunnan Electric Power
关键词
优化调度
需求响应
可中断负荷
安全约束
optimal scheduling
demand response
interruptable load
safety constrain