Dynamic Optimization Model of AGC Units Considering TCPS Assessment Constraints

doi:10.11930/j.issn.1004-9649.202304103

Abstract

Abstract:

In recent years, power grid has begun to use the transformational control performance standard (TCPS) to assess the level of automatic generation control (AGC) in various regions. However, existing researches only consider the assessment of control performance standard (CPS). In view of this, a dynamic optimization model of AGC units considering TCPS is proposed, which takes the minimum comprehensive adjustment cost of secondary frequency regulation as the objective and the system power balance and TCPS assessment as the constraints. The piecewise functions of the TCPS assessment constraints in the new model are linearized to achieve the efficient solution of the model. Based on a modified IEEE example, an AGC hysteresis control strategy in engineering and CPS, the effectiveness of the model is verified through simulation.

Key words: automatic generation control, dynamic optimization, hysteresis control

Sheng CHEN, Honglue ZHANG, Tian XIA, Xue YANG, Wenjun ZHANG, Wei YAN. Dynamic Optimization Model of AGC Units Considering TCPS Assessment Constraints[J]. Electric Power, 2024, 57(8): 145-151.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202304103

https://www.electricpower.com.cn/EN/Y2024/V57/I8/145

Figures/Tables 8

References 31

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机组编号	机组类型	初始出力/MW	爬坡速率/ (MW·min^–1)	最小持续爬坡时间/min	计划电量调整费用系数/(元·(MW·min)^–1)	爬坡里程费用系数/ (元·(MW·min)^–1)	机组单位调节功率/(MW·Hz^–1)	最大出力/MW	最小出力/MW
1	AGC	266.8	10~30	4	8.33	8.33	20	500	100
2	AGC	120.0	10~50	2	4.17	4.17	25	500	100
3	AGC	168.0	10~30	3	8.33	8.33	20	500	100
4	非AGC	175.3	—	—	—	—	20	—	—
5	非AGC	200.5	—	—	—	—	20	—	—

机组编号	机组类型	初始出力/MW	爬坡速率/ (MW·min^–1)	最小持续爬坡时间/min	计划电量调整费用系数/(元·(MW·min)^–1)	爬坡里程费用系数/ (元·(MW·min)^–1)	机组单位调节功率/(MW·Hz^–1)	最大出力/MW	最小出力/MW
1	AGC	266.8	10~30	4	8.33	8.33	20	500	100
2	AGC	120.0	10~50	2	4.17	4.17	25	500	100
3	AGC	168.0	10~30	3	8.33	8.33	20	500	100
4	非AGC	175.3	—	—	—	—	20	—	—
5	非AGC	200.5	—	—	—	—	20	—	—

控制区域频率偏差系数/ (MW·(0.1 Hz)^–1)	互联电网频率偏差系数/ (MW·(0.1 Hz)^–1)	1分钟频率控制目标/Hz	15分钟频率控制目标/Hz
15.4 375	92.625	0.019 473	0.024 039

系统频率偏差上下限/Hz	联络线功率偏差上下限/MW	控制区域负荷单位调节功率/ (MW·Hz^–1)	互联电网单位调节功率/ (MW·Hz^–1)
±0.2	±2	1.5	120

控制区域频率偏差系数/ (MW·(0.1 Hz)^–1)	互联电网频率偏差系数/ (MW·(0.1 Hz)^–1)	1分钟频率控制目标/Hz	15分钟频率控制目标/Hz
15.4 375	92.625	0.019 473	0.024 039

系统频率偏差上下限/Hz	联络线功率偏差上下限/MW	控制区域负荷单位调节功率/ (MW·Hz^–1)	互联电网单位调节功率/ (MW·Hz^–1)
±0.2	±2	1.5	120

预测负荷波动量/%	TCPS考核结果		二次调频综合调整费用
预测负荷波动量/%	滞后控制策略	本文模型	滞后控制策略/元	本文模型/元	费用优化量/%
–5	不通过	通过	4020	1904	111
–4	不通过	通过	6323	2172	191
–3	通过	通过	6352	2596	145
–2	不通过	通过	3288	3119	5
–1	不通过	通过	4876	3619	35
0	通过	通过	4884	3992	22
+1	通过	通过	6079	4602	32
+2	通过	通过	6557	5209	26
+3	通过	通过	7035	5725	23
+4	通过	通过	7513	6240	20
+5	通过	通过	8018	6755	19