Multi-Energy Storage Power Station Planning Method Based on Overload Ratio of Main Transformer

doi:10.16628/j.cnki.2095-8188.2021.12.006

Abstract

Abstract:

To effectively relieve the overload and peak regulation pressure of the main transformer in the power grid.A planning method of the multi-energy storage power station is proposed,which is constrained by the heavy load ratio of the main transformer.While satisfying the operating constraints of the system,this method builds an optimization objective of maximizing the net present value (NPV) of economic benefit and dynamic life cycle cost for the operating cycle of the energy storage power station to optimize the installation location and capacity of the energy storage power station as well as the installation number.The improved NSGA-Ⅱ algorithm is used to solve the problem.Finally,taking a demonstration project as an example,this planning method is used to plan multiple energy storage power stations.The simulation results show that this planning method can effectively reduce the peak-valley error rate and the overload rate of the main transformer,and improve the stable operation ability of the system.

Key words: main transformer heavy load, peak shaving, dynamic full life cycle, improved NSGA-II algorithm

CLC Number:

TM615

YANG Jun, HUANG Jiyuan, HUANG Keli, ZENG Linjun. Multi-Energy Storage Power Station Planning Method Based on Overload Ratio of Main Transformer[J]. LOW VOLTAGE APPARATUS, 2021, 0(12): 34-41.

Figures/Tables 8

References 33

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参数	数值	参数	数值
C_f/(元·h^-1)	500	T_f/h	42
N₁	3	r/%	6.5
T_m/h	8	λ	0.5

序号	站址	电压等级/kV	选址说明
1	榔云	220	榔云变负载率达95.44%,10 kV负荷达73 MW;位于该地区最中心位置
2	延里	220	延里2017年负载率达91%,10 kV负荷达105 MW;220 kV艾家冲-延里断面供电压力大
3	芙清	220	芙清变位于该地区最中心位置,最大负载率达95%,10 kV负荷达124 MW
4	金山	110	终期2台规模,2017年接近满载
5	宁渡	110	玉潭-茆田-宁渡-通益的单线结构接入系统,可靠性较低;宁渡境内风电、小水电规模较多,净负荷波动较大
6	望坡	110	220 kV艾家冲-延里断面供电压力大;现有主变2台,主变重载,围墙内无法扩建第三台主变
7	永塘	110	位于电网末端,负载较重;110 kV线路供带负荷超过100 MW
8	江坪	110	110 kV网络结构薄弱;主变重载
9	沙岭	110	2017年负载率89.5%
10	木槿冲	110	最大负荷88.4 MW,负载率88.4%
11	安兴	110	主变重载;110 kV网络结构薄弱
12	雷潭	110	主变重载;负荷发展较快

项目	芙清	榔云	延里	总计
容量/MW	50.2	34.7	40.6	93.5
收益/万元	32 002.5	22 121.2	25 882.5	59 606.2
成本/万元	18 383.2	12 707.1	14 867.7	34 239.7
NPV/万元	13 619.3	9 414.1	11 014.8	28 279.1

项目	芙清	榔云	延里	宁渡	总计
容量/MW	47.5	32.7	39.6	8.2	128
效益/万元	30 281.3	20 846.3	2 524.5	5 227.5	81 600.0
成本/万元	17 394.5	11 974.7	1 450.2	3 002.8	46 873.6
NPV/万元	12 886.8	8 871.5	10 743.5	2 224.6	34 726.4

项目	芙清	榔云	延里	宁渡	木槿冲	总计
容量/MW	45.5	30.7	36.6	5.2	5.0	123.0
效益/万元	29 006.3	19 571.3	23 332.5	3 315.0	3 187.5	78 412.5
成本/万元	16 662.1	11 242.3	13 402.9	1 904.2	1 831.0	45 042.6
NPV/万元	12 344.2	8 328.9	9 929.6	1 410.8	1 356.5	33 369.9