Research on Capacity Design of Power-Side Energy Storage Participating in Grid Frequency Modulation

doi:10.16628/j.cnki.2095-8188.2020.10.013

Abstract

Abstract:

The rapid development of the national economy has brought relatively unbalanced load distribution,which brings greater challenges to the stability of the grid frequency.Thermal power units have stronger stability than renewable energy,so they need to play a more important role in grid frequency regulation.In addition,with the increase in the proportion of renewable energy power generation in our country,the pressure on the grid frequency adjustment that thermal power units need to bear is gradually increasing.The automatic generation control(AGC) auxiliary service policy has brought new opportunities and challenges to the development of energy storage technologies.This article analyzes the actual output data of a thermal power unit in Central China,the optimal configuration plan for power-side energy storage participating in grid frequency modulation is given by comparing the benefits of different configurations of energy storage participating in auxiliary services.The algorithm proposed in this article provides a design reference for subsequent thermal power units equipped with energy storage to participate in grid frequency modulation auxiliary services,also helps to improve the consumption of renewable energy.

Key words: automatic generation control(AGC), energy storage system, capacity design optimization, frequency modulation, grid stability

CLC Number:

TM611

WANG Junjie, SUN Jia, XU Meng, ZHANG Jinyi, GUO Xiaoyu, ZHANG Guoqiang. Research on Capacity Design of Power-Side Energy Storage Participating in Grid Frequency Modulation[J]. LOW VOLTAGE APPARATUS, 2020, 0(10): 84-89.

Figures/Tables 11

References 12

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储能额定功率 /MW	储能额定容量 /MWh	原始 AGC契合度/%	加储能后 AGC契合度/%	原始平均偏差/MW	加储能后平均偏差/MW
5	10	100.369	100.258	6.04	3.429 0
5	15	100.369	100.256	6.04	3.350 8
5	20	100.369	100.255	6.04	3.353 6
5	30	100.369	100.255	6.04	3.335 4
5	40	100.369	100.255	6.04	3.321 2
10.5	10	100.369	100.200	6.04	1.981 8
10.5	20	100.369	100.192	6.04	1.792 6
10.5	30	100.369	100.191	6.04	1.705 7
10.5	40	100.369	100.190	6.04	1.663 2
21	10.5	100.369	100.186	6.04	1.557 9
21	21	100.369	100.177	6.04	1.351 7
21	42	100.369	100.171	6.04	1.137 8
21	63	100.369	100.169	6.04	1.001 6
Inf	Inf	100.369	99.999	6.04	0.060 4

储能额定功率/MW	储能额定容量/MWh	原始 K	加储能后K
5	10	0.647 7	4.616 2
5	15	0.647 7	4.619 9
5	20	0.647 7	4.622 0
5	30	0.647 7	4.622 5
5	40	0.647 7	4.622 7
10.5	10	0.647 7	5.000 1
10.5	20	0.647 7	5.009 7
10.5	30	0.647 7	5.011 0
10.5	40	0.647 7	5.012 5
21	10.5	0.647 7	5.208 3
21	21	0.647 7	5.220 3
21	42	0.647 7	5.228 8
21	63	0.647 7	5.233 5
Inf	Inf	0.647 7	5.258 4