Research on Economic Configuration of Energy Storage for Assisting New Energy in Primary Frequency Regulation

doi:10.11930/j.issn.1004-9649.202307042

Abstract

Abstract:

When participating in primary frequency regulation of electrical power systems, it is necessary for new energy to address the issue of energy sources. Configuring energy storage is an effective way. In practical application, the configuration of energy storage needs to consider the factors of physical characteristics, unit cost, and other constraints to comprehensively compare the technical economy. However, the energy storage system configuration schemes proposed in existing literature mainly analyze operational scenarios and fail to consider various engineering constraints and actual cost data of energy storage. Based on the actual cost data, this article fully considers the physical characteristics and engineering design constraints of the energy storage system to study the economy of distributed access to units within the station for assisting primary frequency regulation of new energy. The article analyzes the technical characteristics and design constraints of three types of energy storage systems, namely lithium batteries, flywheels, and supercapacitors. On this basis, three types of configuration methods for energy storage for primary frequency regulation are proposed, and cost analysis and technical economy comparison are conducted based on the configuration schemes.

Key words: new energy, energy storage, distributed access, primary frequency regulation, economy

Luyang LI, Longxiang CHEN, Lei CHEN, Dawei SUN, Linlin WU, Yong MIN. Research on Economic Configuration of Energy Storage for Assisting New Energy in Primary Frequency Regulation[J]. Electric Power, 2024, 57(7): 54-65.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202307042

https://www.electricpower.com.cn/EN/Y2024/V57/I7/54

Figures/Tables 10

Fig.1 Applicable power range and operating time at rated power of different types of energy storage technologies

Fig.2 Structure of lithium battery energy storage system

Fig.3 Structure of flywheel energy storage system

Fig.4 Structure of supercapacitor energy storage system

Table 1 Technical and economic characteristics of APR26650 m1 b type lithium battery

性能指标		指标参数
平台电压/ V		3.3
容量/(A·h)		2.5
最大放电倍率		48 C/持续10 s
最大充电倍率		10 C/持续10 s
持续放电倍率		20 C
持续充电倍率		4 C
集成模组价格/(元·(W·h)^–1)		15

Table 2 Quotations for flywheel energy storage systems with frequency regulation from different manufacturers

型号	容量	成本/万元
GTR333	333 kW/1.5 kW·h	112.5
HHE-FW1M45	1000 kW/45 kW·h	160.0
HC-325	325 kW/50 kW·h	125.0

Table 3 Technical parameters of standard module of supercapacitor

性能指标		指标参数
额定电压U_e/V		48
额定电容量C_e/F		165
持续工作电流I_e/A		71
峰值工作电流I_p/A		100
存储电量W_e/(W·h)		53

Table 4 System capacity with different ratios of capacitance and battery configurations 单位：kW·h

电容功率与电池功率比值	电容电量	系统总电量
1∶3	10.03	628.27
2∶2	15.05	427.21
3∶1	23.08	229.16

Table 5 Cost of hybrid energy storage configuration of supercapacitors and lithium batteries for frequency regulation 单位：万元

电容功率与电池功率比值	电容总成本	电池总成本	总成本
1∶3	72.695	216.78	289.475
2∶2	145.390	144.51	289.900
3∶1	218.085	72.27	290.355

Fig.5 Construction cost of each energy storage scheme for assisting frequency regulation of new energy

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