基于功率和容量补偿的火/储AGC调频可行性分析与启示

doi:10.19799/j.cnki.2095-4239.2022.0455

摘要/Abstract

摘要：

随着“十四五”能源结构优化调整的推进，电网固有调频惯量减少，规模化电化学储能系统投入调频市场，其技术与经济可行性受到业界关注。针对当前AGC调频在功率与容量两种补偿方式下，何种方式更能体现储能性能优势且可越过收益的盈亏平衡点等问题，基于考核与补偿中的关键参量，建立了考虑电池储能系统功率与容量特性的火/储联合AGC调频的功率补偿和容量补偿数学模型，确定两种补偿方式下影响收益的性能特征量，选取调节性能中的爬坡速率为桥接参量，构建了功率和容量补偿单价与爬坡速率间的关联关系，提出了获得同等收益下的功率与容量补偿单价比率，通过补偿单价比率对比分析了两种补偿方式下的测算模型对储能参与AGC差调频性能与收益表征的充分性。算例基于调频需求较大但补偿方式不一的，以功率补偿为代表的广东省和容量补偿为代表的陕西省典型日运行数据，通过仿真计算得出技术与收益测算结果，并进行了比对分析，得出了两种补偿方式下的经济可行性比对结果，为储能在调频电力市场的投资决策提供借鉴与参考。

关键词: 储能, 火电机组, AGC, 调频, 功率补偿, 容量补偿

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

中图分类号:

TQ 028.8

杨水丽, 林伟芳, 崔艳妍, 王二军. 基于功率和容量补偿的火/储AGC调频可行性分析与启示[J]. 储能科学与技术, 2023, 12(1): 299-311.

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.

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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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