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1.电力传输与功率变换控制教育部重点实验室(上海交通大学),上海市200240
2.国电南瑞科技股份有限公司,江苏省南京市 211106
3.国网天津市电力公司电力科学研究院,天津市 300384
韩赫(1996—),男,硕士研究生,主要研究方向:综合能源系统运行优化。E-mail:hanxiaojian0213@sjtu.edu.cn
张沛超(1970—),男,通信作者,博士,副教授,主要研究方向:电力系统保护与控制、智能变电站、电力系统仿真、交易式控制。E-mail:pczhang@sjtu.edu.cn
杜炜(1981—),男,博士,高级工程师,主要研究方向:电力电子与电力传动、分布式发电与智能配电网。E-mail:duwei@sgepri.sgcc.com.cn
收稿日期:2020-07-07,
修回日期:2020-08-25,
网络出版日期:2020-11-23,
纸质出版日期:2021-01-25
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韩赫,张沛超,杜炜等.量调节方式下区域热电系统的联合最优潮流[J].电力系统自动化,2021,45(2):30-36.
HAN He,ZHANG Peichao,DU Wei,et al.Joint Optimal Power Flow of District Heat-Electric System in Quantity Regulation Mode[J].Automation of Electric Power Systems,2021,45(2):30-36.
韩赫,张沛超,杜炜等.量调节方式下区域热电系统的联合最优潮流[J].电力系统自动化,2021,45(2):30-36. DOI: 10.7500/AEPS20200707003.
HAN He,ZHANG Peichao,DU Wei,et al.Joint Optimal Power Flow of District Heat-Electric System in Quantity Regulation Mode[J].Automation of Electric Power Systems,2021,45(2):30-36. DOI: 10.7500/AEPS20200707003.
量调节是区域供热网的一种基本调节方式。首先,针对量调节方式下流量可变且处于紊流阻力平方区的特点,提出水力支路压降的二阶锥松弛方法,并引入惩罚成本项确保精确松弛。其次,针对量调节热力工况稳定的特点,提出热力支路的等效热损方法,将管道热损等效至负荷形成无损管道,实现水力与热力模型的独立分析。然后,结合配电网支路潮流模型,建立区域热电系统的联合潮流模型,进而建立具有凸凹规划形式的联合最优潮流模型。最后,将优化模型转换为二阶锥规划问题进行序贯求解。仿真算例表明,与非凸精确模型相比,所提方法保留了很高的求解精度,同时显著提高了求解速度,并能获得全局最优解。
Quantity regulation is a basic regulation mode of district heating networks. First
aiming at the characteristics of the quantity regulation that the flow is variable and in the turbulent resistance square area
a second-order cone relaxation method for pressure drop of hydraulic branches is proposed
and a penalty cost term is introduced to ensure exact relaxation. Second
according to the characteristics of the stable thermal condition of quantity regulation
a equivalent heat loss method of thermal branches is proposed. The heat loss of the pipeline is equivalent to the load to form a lossless pipeline
which realizes the independent analysis of hydraulic and thermal models. Then
combined with the branch flow model of the distribution network
a joint power flow model of the district heat-electric system is built. Furthermore
a joint optimal power flow model with the form of convex-concave programming for the district heat-electric system is established. Finally
the optimization model is transformed into a second-order cone programming problem and solved sequentially. Simulation cases show that compared with the non-convex accurate model
the proposed method retains a high solution accuracy
improves the solving speed significantly
and can obtain the global optimal solution.
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