PDF《计及冷、热、电联产的气电互联网络最优调度》

第47 卷第3期电力系统保护与控制 Vol.

47 No.3

2019 年2月1日Power System Protection and Control Feb. 1,

2019 DOI: 10.7667/PSPC180177 计及冷、热、电联产的气电互联网络最优调度 汪洋子

1 ,陈茜2(1.华北电力大学,北京 102206;

2.国网北京市电力公司电力科学研究院,北京 100075) 摘要:能源互联网的发展提高了系统的能效、经济性和安全性.储气备用不仅维护了气网自身的安全运行,还能 支持燃气轮机出力快速变化,提供电网额外的灵活备用,这对平衡电网中的可再生能源和多能源负荷具有重要意 义.此外,气电网络间的高效协调互补,与包括冷、热、电三联产设施在内的多能源应用的运行也有赖于充足的 储气备用.为促进气电互联网络安全高效地运行,创新地将储气备用纳入调度优化,提出了一种含有三联产设施 的气电互联网络的多目标最优调度模型,并使用 NSGAII 进行求解.算例分析显示了所提方法的有效性. 关键词:气电互联网络;

冷、热、电联产;

储气备用;

最优调度;

多目标优化 Optimal dispatch for the integrated electrical and natural gas network with combined cooling, heat and power plant WANG Yangzi1 , CHEN Qian2 (1. North China Electric Power University, Beijing 102206, China;

2. State Grid Beijing Electric Power Research Institute, Beijing 100075, China) Abstract: The development of the energy internet promotes the efficiency, economy and security of the energy system. In the Integrated Electrical and Natural Gas Network (IEGN), linepack reserves not only secure the safe operation of the natural gas network, but also could be employed by gas turbines to provide fast-response flexibility. It plays an increasingly significant role in balancing the electrical network with renewable energy sources and multi-energy utilizations. Besides, the linepack reserve also guards the coordination between networks, and the normal function of multi-energy utilizations, including combined cooling, heat and power, aka trigeneration plants. To promote the safety and coordination of the IEGN, this paper novelly integrates the linepack reserve into the dispatch process and proposes a multi-objective optimal dispatch model for the IEGN with trigeneration plants to simultaneously promote its economy, safety and efficiency. NSGAII is employed to solve it. Finally, case studies demonstrate its effectiveness. This work is supported by Fundamental Research Funds for the Central Universities (No. 2016XS13). Key words: integrated electrical and natural gas network;

trigeneration;

linepack reserve;

optimal dispatch;

multi-objective optimization

0 引言 随着能源互联网的发展,天然气、电等多种能 源网络间的联系日益紧密,多能互补不仅提高了能 源系统的经济性和能效[1-4] ,也提高了安全性[5-7] . 储气备用作为气网正常运行时管网内特有的天然气 储备,历来被调度员用于维护网络的安全运行[5-6] . 能源网络的互联让储气备用在维护气网正常运行之 余,可以作为一种备用源,服务其他能源网络,尤 其是与气网联系日渐紧密的电气网络[7-9] . 燃气轮机 基金项目: 中央高校基本科研业务费专项资金资助(2016XS13) 具备良好的爬坡能力,通过使用储气备用,可以快 速改变出力,平衡电网中的各类扰动[5] .除了可再 生能源引入的间歇性波动外,多能源负荷也会通过 各类多能源应用将波动耦合入电网,尤其是随季节 波动显著的冷、热负荷.此外,多能源应用的灵活 运行也离不开充足的储气备用.以冷、热、电三联 产设施为代表的多能源应用普遍具备灵活的运行方 式.比如:热能可以由电能转化(电热泵等),也可 以由天然气转化(天然气炉等);