电工技术学报  2023, Vol. 38 Issue (16): 4433-4447    DOI: 10.19595/j.cnki.1000-6753.tces.220910
电力系统与综合能源 |
考虑园区自备热电联产机组运行约束的电热耦合系统动态优化调度
黄悦华, 陈庆, 张磊, 叶婧, 卢天林
三峡大学电气与新能源学院 宜昌 443002
Dynamic Optimal Scheduling of Combined Electrical and Heat System Considering State Operation Constraints of CHP Units in the Park
Huang Yuehua, Chen Qing, Zhang Lei, Ye Jing, Lu Tianlin
College of Electrical Engineering and New Energy China Three Gorges University Yichang 443002 China
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摘要 园区企业对自备热电联产(CHP)机组进行技术改造可以显著提升其快速调节能力,但是调度过程对CHP机组动态过程精细化建模不足,导致调度方案难以匹配CHP机组的运行状态。该文提出一种考虑园区自备CHP机组状态运行约束的电热耦合系统(CEHS)动态优化调度方法。首先,考虑CHP机组快速调节下的电能、流量、压力等状态量特性建立机组的动态约束,进而构建CEHS动态优化调度模型;然后,针对含微分方程约束的CEHS动态优化难以求解的问题,提出一种动态自适应粒子群-径向基拟序贯双层优化求解策略;最后,基于改进的IEEE 30节点系统验证该文所提方法的正确性和有效性。
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黄悦华
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关键词 电热耦合系统状态运行约束径向基函数拟序贯法双层动态优化    
Abstract:The technical reformation of self-provided combined heat and power (CHP) units by park enterprises can significantly improve their fast regulation capability. However, the dynamic process of the CHP unit is not finely modeled in the scheduling process, which makes it difficult for the scheduling scheme to match the operation state of CHP units. This paper proposed a combined electrical and heating system (CEHS) dynamic optimal scheduling method considering the state operation constraints of the park's self-provided CHP units.
In the park-type CEHS, the enterprise's self-provided CHP units are subject to the unified dispatching of the power grid, which supplies the enterprise's own power and part of the power for production and living in the radiation area. The shortage of power supply is met by the grid dispatching wind power and conventional thermal power units. The heat source of CHP unit exchanges heat with the first heating station to supply the internal heat load of industrial enterprises. Firstly, considering the characteristics of electric energy, flow, pressure and other state variables under the rapid regulation of CHP unit, the dynamic constraints of the unit in the form of differential algebraic equations (DAEs) are established.
Secondly, a CEHS dynamic optimization scheduling model considering the state operation constraints of the self-provided CHP units in the park is constructed. Aiming at the problem that CEHS dynamic optimization with DAEs constraints is difficult to solve, a dynamic adaptive particle swarm optimization (DAPSO)-radial basis quasi sequential bi-level optimization strategy is proposed. The outer layer optimizes the CEHS decision variables with the objective of minimizing the CEHS operation cost. The DAPSO algorithm is used to iteratively optimize the scheduling scheme to obtain the output of each unit. The electric and thermal output values of CHP units are taken as the setting values for dynamic optimization in the inner layer. The inner layer aims at minimizing the performance index of the control process of the CHP units. By guiding the output variables to approach the desired set value, the unit control process converges and the control variables are smoothed as much as possible. For the dynamic optimization problem of the optimal control of the inner unit, the radial basis function (RBF) format is used to discretize the variables, and the discretized nonlinear programming problem is solved by the quasi sequential method.
Finally, the correctness and effectiveness of the proposed method were verified based on the improved IEEE30 node system. The simulation results show that the wind power consumption capacity of the system can be improved after fully considering the control characteristics of CHP units. The flexibility of CHP unit modification provides the possibility for enterprise self-provided power plants to realize auxiliary services to the grid. The data show that the bi-level solution strategy of outer DAPSO optimal scheduling + inner quasi sequential method (RBF discrete format) dynamic optimization is a good balance of computational efficiency and solution accuracy. The optimal scheduling of CHP unit dynamic modeling has obvious advantages in system economy and unit safety.
Key wordsCombined electrical and heating system    state operation constraints    radial basis function    quasi-sequential method    bi-level dynamic optimization   
收稿日期: 2022-05-26     
PACS: TM732  
基金资助:国家自然科学基金项目(52007103)、湖北省科技重大专项项目(2020AEA012)和三峡大学学位论文培优基金项目(2021BSPY013)资助
通讯作者: 张磊, 男,1986年生,博士,副教授,研究方向为大规模新能源接入电力系统的优化调度。E-mail:leizhang3188@163.com   
作者简介: 黄悦华, 男,1972年生,教授,博士生导师,研究方向为智能电网,新能源微电网、综合能源系统。E-mail:hyh@ctgu.edu.cn
引用本文:   
黄悦华, 陈庆, 张磊, 叶婧, 卢天林. 考虑园区自备热电联产机组运行约束的电热耦合系统动态优化调度[J]. 电工技术学报, 2023, 38(16): 4433-4447. Huang Yuehua, Chen Qing, Zhang Lei, Ye Jing, Lu Tianlin. Dynamic Optimal Scheduling of Combined Electrical and Heat System Considering State Operation Constraints of CHP Units in the Park. Transactions of China Electrotechnical Society, 2023, 38(16): 4433-4447.
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