Analysis and enlightenment of AGC modulation for combined fire and storage system based on power and capacity compensation

doi:10.19799/j.cnki.2095-4239.2022.0455

Abstract

Abstract:

With the advancement of the optimization and adjustment of the energy structure during the "14th Five-Year Plan," the intrinsic frequency modulation inertia of the grid was reduced. Then large-scale energy storage system was introduced into the frequency regulation market. Its technological and financial viability attracted the attention of the industry. Based on the critical parameters in the assessment and compensation, a mathematical model of power compensation and capacity compensation for the AGC frequency modulation of the battery energy storage system was developed in order to determine which method can more accurately reflect the performance advantages of energy storage and the benefits that can reach the breakeven point. Then, the performance traits that affect the benefits under the two compensation models were established. Next, the ramp rate in the adjustment performance was selected as the bridge parameter, and a quantitative relationship between power and capacity compensation unit price and ramp rate was built. Finally, the unit price ratio of power and capacity compensation under the same income was proposed, comparing and obtaining the economic feasibility comparison results of the calculation models under the two compensation methods for the performance and benefit characterization of energy storage participating in AGC frequency regulation by comparing the compensation unit price, provide a reference for the investment decision of energy storage in the frequency regulation power market.

Key words: energy storage, thermal power unit, AGC, frequency regulation, power compensation, capacity compensation

CLC Number:

TQ 028.8

Shuili YANG, Weifang LIN, Yanyan CUI, Erjun WANG. Analysis and enlightenment of AGC modulation for combined fire and storage system based on power and capacity compensation[J]. Energy Storage Science and Technology, 2023, 12(1): 299-311.

Figures/Tables 7

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项目		660 MW直吹式机组			300 MW硫化床机组
项目		火电机	火储	提升	火电机	火储	提升
月度响应时间平均	合格率	83.72%	100%		98.23%	100%
月度响应时间平均	考核分	235.6	0	235.6	0	0	0
月度调节速率平均	平均值	14.73	>9.9		2.51	>4.5
月度调节速率平均	考核分	0	0	0	60	0	60
月度贡献电量平均	合格率	25.63%	45.65%	20%	29.11%	37.7%	8.663%
月度贡献电量平均	补偿分			77.75			16
调节容量	1日调节量	278.78	318.38		157.83	175.83
	1日补偿分	5.57	6.36	0.792	3.15	3.51	0.36
	2日调节量	319.18	358.78		167.88	185.88
	2日补偿分	6.38	7.17	0.792	3.35	3.71	0.36
	3日调节量	57.27	96.87		73.36	91.66
	3日补偿分	1.14	1.93	0.792	1.46	1.82	0.36
	月总调节量	6552	7740		3990	4533
	月度补偿分	131	154	23.76	79.814	90.674	10.86
月收益分/分				337.11			86.86
月收益/万元				33.7			8.686
年收益/万元				404.5			104
储能投资/万元		19.8 MW/9.9 MWh		2850	9 MW/4.5 MWh		1350
投资回收期/a		7			12.98

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