Electric Power Construction

Parameter Identification Method for Distribution Systems with a High Proportion of Distributed Renewable Energy

WEI Wei, JI Wenwen, HUANG Xu, JIN Xiaolong, HUANG Pan

Electric Power Construction, 2025, 46(5): 96-111. DOI: 10.12204/j.issn.1000-7229.2025.05.009

支路号	始末节点	e_Mean/%			e_Max/%			e_Var/%
支路号	始末节点	R	X	B	R	X	B	R	X	B
1	1-4	1.39	1.34	2.16	3.00	0.13	2.76	0.84	0.13	0.41
2	4-3	1.45	1.23	2.99	3.20	0.07	5.16	0.89	0.07	1.18
3	4-5	1.39	1.34	2.88	3.00	0.14	4.79	0.83	0.14	1.04
4	3-2	1.44	1.24	1.59	3.19	0.08	2.01	0.89	0.08	0.24
5	9-13	1.34	1.42	2.80	2.83	0.18	4.61	0.80	0.18	0.10
6	4-9	1.39	1.32	3.24	3.02	0.12	5.85	0.84	0.12	0.76
7	9-8	1.39	1.34	3.84	2.99	0.13	5.19	0.84	0.13	1.35
8	9-10	1.45	1.22	1.25	3.22	0.06	1.82	0.90	0.06	0.41
9	8-7	1.35	1.40	2.08	2.87	0.17	2.74	0.81	0.17	0.47
10	10-11	1.27	1.55	1.74	2.59	0.26	2.15	0.75	0.26	0.27
11	8-12	1.28	1.61	2.36	2.62	0.25	3.36	0.77	0.25	0.65

Table 2 Line parameter identification index results under scenario 1

Other figure/table from this article

Fig. 1 Voltage fluctuation comparison chart before and after connecting distributed power sources
Fig. 2 Schematic diagram of distribution system CT installation location
Fig. 3 Distribution line model
Fig. 4 Distribution Transformer Model
Fig. 5 Distribution system topology schematic
Fig. 6 Flowchart of AEKF algorithm for parameter identification
Fig. 7 Temperature variation curve on a certain day in tianjin
Table 1 Scenario Setting Situation
Table 3 Transformer parameter identification index results under scenario 1
Fig. 8 Comparison of e_Mean for R
Fig. 9 Comparison of e_Mean for X
Fig. 10 Comparison of e_Mean for B
Fig. 11 Comparison of e_Max for R
Fig. 12 Comparison of e_Max for X
Fig. 13 Comparison of e_Max for B
Fig. 14 Comparison of e_Var for R
Fig. 15 Comparison of e_Var for X
Fig. 16 Comparison of e_Varfor B
Table 4 Transformer parameter metrics under scenario 2— 6
Fig. 17 Time comparison
Fig. 18 Comparison of e_Mean for R under different methods
Fig. 19 Comparison of e_Mean for X under different methods
Fig. 20 Comparison of e_Mean for B under different methods
Table 5 Transformer e_Mean under scenarios 7—9
Fig. 21 Comparison of e_Mean for voltage magnitude
Fig. 22 Comparison of e_Mean for voltage angle
Fig. A1 Topology structure of a 10 kV system in Tianjin
Fig. A2 Calculation of active power P and reactive power Q with measurement error percentage