Capacity-based optimal configuration of microgrid hybrid energy-storage system with pumped storage based on CEEMDAN

doi:10.19799/j.cnki.2095-4239.2023.0432

Abstract

Abstract:

To reduce fluctuation of the tie-line power in the micro-grid and expand the capacity boundary of a hybrid energy storage system (HESS) in regulation, this study proposes an HESS structure with pumped storage and a capacity-optimization method based on CEEMDAN. First, considering the energy-type energy storage of pumped storage and battery and the power-type energy storage of supercapacitors, the HESS in micro-grid is constructed. Next, the power of the tie line and the total power of the HESS are determined according to the load, and CEEMDAN is used to allocate the power of the storage system. With the minimum annual cost of energy storage as the optimization goal, the capacity-based optimal configuration model of the system is established, and the corresponding solution method is given. The simulation results of the example show that the HESS with pumped storage can improve the system economy and prolong the life of the storage equipment according to the stabilization of the fluctuation of tie-line power. The rationality and effectiveness of the proposed optimal configuration method are verified.

Key words: micro-grid, hybrid energy storage system, complete ensemble empirical mode decomposition, capacity configuration, pumped storage

CLC Number:

TM 641

Zhenbo WEI, Yixin YAO, Wenwen ZHANG, Zihang LUO, Yinjiang LI, Yujie REN. Capacity-based optimal configuration of microgrid hybrid energy-storage system with pumped storage based on CEEMDAN[J]. Energy Storage Science and Technology, 2023, 12(11): 3414-3424.

Figures/Tables 16

Fig. 1

Fig. 2

Fig. 3

Fig. 4

Fig. 5

Fig. 6

Fig. 7

Fig. 8

Table 1

Table 2

Table 3

Results of capacity optimization configuration for scheme 1"

联络线功率偏移率	参数	取值
0.685	$E B N$ /MWh	46.715
	$E C N$ /MWh	24.124
	$C t$ /×10⁷元	5.789

Table 3

Table 4

Capacity optimization configuration results in scheme 2"

联络线功率偏移率	参数	取值
0.540	$E B N$ /MWh	26.518
	$E C N$ /MWh	23.467
	$E P N$ /MWh	63.031
	$C t$ /×10⁷元	5.296

Table 4

Table 5

Capacity optimization configuration results in scheme 3"

联络线功率偏移率	参数	取值
0.998	$E B N$ /MWh	23.864
	$E C N$ /MWh	16.452
	$C t$ /×10⁷元	5.214
	$Y B$ /年	2.12

Table 5

Table 6

Capacity optimization configuration results in scheme 4"

联络线功率偏移率	参数	取值
0.371	$E B N$ /MWh	8.015
	$E C N$ /MWh	21.469
	$E P N$ /MWh	52.540
	$C t$ /×10⁷元	4.651
	$Y B$ /年	2.72

Table 6

Fig. A1

Table A1

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平抑情况	功率偏移率
平抑前	1.147
平抑后	0.371

方案	是否含抽蓄	方法
方案1	否	EEMD
方案2	是	EEMD
方案3	否	CEEMDAN
方案4	是	CEEMDAN

对象	参数	取值
蓄电池	维护率/%	0.01
	单位功率成本/(元/kW)	1500
	单位容量成本/(元/kWh)	1500
	充放电效率/%	90
	循环使用寿命/次	4500
	初始容量/kWh	0.6 E_BN
	荷电状态阈值	0.1～0.9
	寿命/年	20
超级电容器	维护率/%	0.01
	单位功率成本/(元/kW)	1500
	单位容量成本/(元/kWh)	2×10⁴
	充放电效率/%	95
	初始容量/kWh	0.6 E_CN
	荷电状态阈值	0.1～0.9
	寿命/年	30
抽水蓄能	维护率/%	0.02
	单位功率成本/(元/kW)	4075
	单位容量成本/(元/kWh)	250
	抽水/发电效率/%	80
其他	折现率/%	6

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