Electricity-heat Coordinated Control Strategy for Improving the Flexibility of a Once-through CHP Unit

被引：0

作者：

Wang W. ^{[1
]}

Shen P. ^{[1
]}

Li X. ^{[1
]}

Zhang G. ^{[1
]}

Zeng D. ^{[1
]}

Liu J. ^{[1
]}

机构：

[1] State Key Laboratory of Alternate Electric Power System with Renewable Energy Source, North China Electric Power University, Changping District, Beijing

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2023年 / 43卷 / 06期

基金：

中国国家自然科学基金;

关键词：

combined heat and power (CHP); dual control; electricity-heat coordination; flexibility; load variation; once-though boiler;

D O I：

10.13334/j.0258-8013.pcsee.220716

中图分类号：

学科分类号：

摘要：

To overcome the influence of “heat-led mode” on the combined heat and power (CHP) unit with a once-though boiler (OTB), the dual control method is introduced and improved to develop a coordinated control strategy for electricity and heat coordination. Based on the identification of operation data, the dynamic model for heat-electricity conversion is established; then the coordinated model for the OTB-CHP unit is developed. The integral signal of thermal load deviation is reconstructed to realize the real-time detection of thermal load. The dual control strategy is proposed to improve the load change speed by use of heat extraction active response, and to recover the heat load by use of accurate energy balance. The simulating results reveal that with the proposed strategy the load change speed can reach 3% of its rated power in per minute, the automatic generation control (AGC) performance index can be doubled, and the key parameters such as heat load can be kept stable. The proposed control strategy realizes the coordinated control of once-through CHP units and significantly improves the unit operating flexibility. ©2023 Chin.Soc.for Elec.Eng.

引用

页码：2100 / 2108

页数：8

共 24 条

[1] XU Pengjiang, XU Rui, DENG Jia, Analysis of the influence of heating steam extraction of 330MW unit on the economy of electric generation[J], Proceedings of the CSEE, 40, 19, pp. 6257-6263, (2020)
[2] RUAN Jian, DUAN Wangquan, Test on the adjustment characteristics of the regulating valve in the thermal reheating of 1000MW steam turbine[J], Electric Power Equipment Management, 2020, 10, pp. 94-96
[3] YANG Weishan, ZHANG Lanqing, WANG Tao, Analysis of heating reform scheme of a 1030MW ultra-supercritical double reheat power unit[J], Mechanical and Electrical Information, 12, pp. 56-58, (2020)
[4] ZHU Jianying, Analysis and optimization of AGC and primary frequency control strategy for 330MW heating unit[J], Power & Energy, 33, 3, pp. 227-231, (2012)
[5] YAN Shu, ZENG Deliang, LIU Jizhen, A simplified non-linear model of a once-through boiler-turbine unit and its application[J], Proceedings of the CSEE, 32, 11, pp. 126-134, (2012)
[6] Jizhen LIU, Shu YAN, ZENG Deliang, A dynamic model used for controller design of a coal fired once-through boiler-turbine unit[J], Energy, 93, pp. 2069-2078, (2015)
[7] WANG Jianqiang, ZHENG Weijian, TONG Xiaozhong, Experimental study on enhancing the quality of AGC and primary frequency regulation based on heat system accumulation[J], Electric Power, 47, 9, pp. 1-5, (2014)
[8] LIU Xinping, TIAN Liang, WANG Qi, Simplified nonlinear dynamic model of generating load-throttle pressure-extraction pressure for heating units[J], Journal of Chinese Society of Power Engineering, 34, 2, pp. 115-121, (2014)
[9] LIU Xinping, TIAN Liang, WANG Qi, A control method of rapid load change for heat supply units compensating wind power disturbance[J], Automation of Electric Power Systems, 38, 6, pp. 26-32, (2014)
[10] DENG Tuoyu, TIAN Liang, LIU Jizhen, Spatial and temporal multiscale analysis on energy storage in heat supply units’ boiler and heat supply nets[J], Proceedings of the CSEE, 37, 2, pp. 599-605, (2017)

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