Operational benefit evaluation for frequency regulation application of large-scale battery energy storage

doi:10.19799/j.cnki.2095-4239.2020.0223

Abstract

Abstract:

The battery energy storage system with an excellent control performance has become a new generation of support means for dealing with the frequency problem after faults or high-power disturbances. However, the market mechanism for energy storage applications has not yet been clarified, and the value measurement has not yet become systematic, restricting its development. In response to this problem, based on the analysis of the research results, combines the cost analysis of equipment, infrastructure, operation, and maintenance, etc., from the dimensions of the flow of value to the revenue, environmental benefits and social benefits, the operation benefit evaluation index and mathematical mode of energy storage frequency modulation system are constructed, it includes quantifiable evaluation index models such as financial net present value, rate of return, investment payback period, fossil energy conservation, and gas and smoke emission reduction. Using the least square method to determine the weighted decision ideas of subjective and objective indicators, this study puts forward a comprehensive evaluation model that can reflect the economics of different criterion layers and judge the operating benefits of each criterion layer. A 9 MW/4.5 MWh energy storage combined with a 300 MW thermal power unit is taken as an example, by which the effectiveness of the operational benefit evaluation method is verified.

Key words: battery energy storage, frequency regulation, least square method, operation benefit

CLC Number:

TQ 028.8

Yufei RAO, Ze GAO, Shuili YANG, Lijun WANG, Xiangjun LI, Jingchao ZHANG. Operational benefit evaluation for frequency regulation application of large-scale battery energy storage[J]. Energy Storage Science and Technology, 2020, 9(6): 1828-1836.

Figures/Tables 7

Fig.1

Fig.2

Table 1

Pollutants emitted by 1 kilogram of coal"

种类	污染物排放量/kg	排放收费标准/元·kg^-1
CO₂	2.4925	0.160
SO₂	0.075	20
$N O x$	0.0375	0.6316

Table 1

Fig.3

Table2

Table 3

Table 4

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项目收益 /万元	调频补偿标准
项目收益 /万元	5元/MW	10元/MW
储能侧补偿收益	564	1128
发电侧补偿收益	141	282
考核减少收益	186.5	186.5
发电煤耗减少收益	216	216
总调频费用减少收益	827	827
环境效益	692	692

年份	1	2	3	4	5	6	7	8	9	10
年总收益	705	705	705	705	705	705	705	705	705	705
营业成本	200	300	300	300	300	300	300	300	300	300
电费	100	100	100	100	100	100	100	100	100	100
日常运营费用	100	100	100	100	100	100	100	100	100	100
设备维护及更换	0	100	100	100	100	100	100	100	100	100

年份	1	2	3	4	5	6	7	8	9	10
年总收益/万元	1410	1410	1410	1410	1410	1410	1410	1410	1410	1410
营业成本/万元	200	300	300	300	300	300	300	300	300	300
电费/万元	100	100	100	100	100	100	100	100	100	100
日常运营费用/万元	100	100	100	100	100	100	100	100	100	100
设备维护及更换/万元	0	100	100	100	100	100	100	100	100	100

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