Influence of controller parameters on AGC regulation performance

doi:10.3969/j.issn.2097-0706.2022.04.005

Abstract

Abstract:

To consume more wind power and PV power, Automatic Generation Control （AGC） makes stricter requires on regulation speed, regulation accuracy and coal-fired units' load response time simultaneously. In order to further enhance the regulation performance of AGC, the influence of controller parameters on the regulation performance of AGC under the Direct Energy Balance （DEB） control structure is analyzed. Firstly, three performance indexes of AGC, regulation rate, regulation accuracy and response time,and their calculation methods are introduced. Analyzing the influencing factors of the indexes above, the control difficulties such as coupling and nonlinearity of the Coordinated Control System （CCS） are summarized. Based on the DEB control structure and optimized controller parameters, the influences of controller parameters on the regulation rate, regulation accuracy and response time are analyzed by single variable method. Simulation results show that the proportional and integral gains of the power loop and the main steam pressure loop have significant correlation with AGC regulation indexes. In order to improve the AGC regulation performance, the proportional gain of the power loop,the integral gain of the power loop and the proportional gain of the main steam pressure circuit can be moderately increased. The conclusions provide direction guidance for controller parameter optimization to enhance the regulation performance of AGC, and which are promising in engineering practices.

Key words: AGC, regulation speed, regulation precision, response time, controller parameters, direct energy balance, new power system, new energy

CLC Number:

TK39：TM611：TP13

CAO Zifeng, YANG Dong, WU Maokun, WANG Youlong, PAN Fengping, WU Zhenlong. Influence of controller parameters on AGC regulation performance[J]. Integrated Intelligent Energy, 2022, 44(4): 36-42.

Figures/Tables 14

Table 1

Standard regulation rate of different types of units

机组类型	$v N, i$ 单位时间变化量占P_e的比例/%
直吹式制粉系统的汽包炉燃煤机组	1.5
带中间储仓式制粉系统的燃煤机组	2.0
循环流化床机组和燃用特殊煤种机组	1.0
超临界定压运行直流炉机组	1.0
其他类型直流炉机组	1.5
燃气机组	4.0
水力发电机组	10.0

Table 1

Table 2

Parameters under typical CCS working conditions

工况	$N e$ /MW	$p T$ /MPa	$u B$ /（t·h^-1）	$μ t$ /%
A（30%P_e）	90.0	13.82	40.7	27.4
B（40%P_e）	120.6	13.82	53.8	38.6
C（65%P_e）	195.3	14.81	85.2	63.4
D（90%P_e）	270.0	16.09	116.1	85.4
E（100%P_e）	300.1	16.09	128.4	96.7

Table 2

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References 14

[1]	刘吉臻, 曾德良, 田亮, 等. 新能源电力消纳与燃煤电厂弹性运行控制策略[J]. 中国电机工程学报, 2015, 35(21):5385-5394.
	LIU Jizhen, ZENG Deliang, TIAN Liang, et al. Control strategy for operating flexibility of coal-fired power plants in alternate electrical power[J]. Proceedings of the CSEE, 2015, 35(21):5385-5394.
[2]	山东能源监管办. 山东电力辅助服务市场运营规则(试行)(2020 年修订版)[S], 2020.
[3]	周建玉, 朱能飞, 乐凌志, 等. 三河发电有限公司^#1机组AGC优化[J]. 华电技术, 2015, 37(6):57-61.
	ZHOU Jianyu, ZHU Nengfei, LE Lingzhi, et al. Optimization of AGC of unit No.1 in Sanhe Power Generation Company Limited[J]. Huadian Technology, 2015, 37(6):57-61.
[4]	刘恩仁, 李然磊, 周长来, 等. 高供热负荷超临界机组AGC控制优化策略[J]. 山东电力技术, 2020, 47(9):61-66.
	LIU Enren, LI Ranlei, ZHOU Changlai, et al. AGC control optimization strategy for supercritical units with high heating load[J]. Shandong Electric Power, 2020, 47(9):61-66.
[5]	杨荣照, 陈亦平, 夏成军, 等. 高比例水电系统AGC稳定性分析及控制策略优化[J]. 电网技术, 2020, 44(3):880-886.
	YANG Rongzhao, CHEN Yiping, XIA Chengjun, et al. AGC stability analysis and control strategy optimization of high proportion hydropower system[J]. Power System Technology, 2020, 44(3):880-886.
[6]	杨玉柱, 许伟. 某电厂AGC调节异常原因分析与防范措施[J]. 华电技术, 2019, 41(7):77-79.
	YANG Yuzhu, XU Wei. Cause analysis and preventive measures of abnormal regulation of AGC in a power plant[J]. Huadian Technology, 2019, 41(7):77-79.
[7]	SUN L, LI D, LEE K Y. Optimal disturbance rejection for PI controller with constraints on relative delay margin[J]. ISA transactions, 2016, 63:103-111. doi: 10.1016/j.isatra.2016.03.014
[8]	MA D, CHEN J. Delay margin of low-order systems achievable by PID controllers[J]. IEEE Transactions on Automatic Control, 2019, 64(5):1958-1973. doi: 10.1109/TAC.2018.2853567
[9]	WU Z, LI D, XUE Y, et al. Gain scheduling design based on active disturbance rejection control for thermal power plant under full operating conditions[J]. Energy, 2019, 185:744-762. doi: 10.1016/j.energy.2019.07.077
[10]	秦海山, 栾丛超, 侯晓宁, 等. 单抽供热机组负荷控制系统的解耦设计及动态响应特性研究[J]. 华电技术, 2021, 43(3):40-47. doi: 10.3969/j.issn.1674-1951.2021.03.007
	QIN Haishan, LUAN Congchao, HOU Xiaoning, et al. Decoupling design of the load control system in a single-extraction heating unit and its dynamic response characteristics[J]. Huadian Technology, 2021, 43(3):40-47.
[11]	SUN L, LI D, LEE K Y. et al. Control-oriented modeling and analysis of direct energy balance in coal-fired boiler-turbine unit[J]. Control Engineering Practice, 2016, 55:38-55. doi: 10.1016/j.conengprac.2016.06.013
[12]	ANDERSON B D O, BRINSMEAD T S, BRUYNE F D. The Vinnicombe metric for nonlinear operators[J]. IEEE Transactions on Automatic Control, 2002, 47(9):1450-1465. doi: 10.1109/TAC.2002.802767
[13]	WU Z, LI D, XUE Y, et al. Modified active disturbance rejection control for fluidized bed combustor[J]. ISA Transactions, 2020, 102:135-153. doi: 10.1016/j.isatra.2020.03.003
[14]	SUN L, HUA Q, LI D, et al. Direct energy balance based active disturbance rejection control for coal-fired power plant[J]. ISA Transactions, 2017, 70:486-493. doi: 10.1016/j.isatra.2017.06.003

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