Analysis and Control Measures of the Influence of the Grid Connection of Geku Electrified Railway on the Voltage Unbalance of Xinjiang Power Grid

doi:10.11985/2022.04.034

Abstract

Abstract:

In order to solve the power quality problem caused by the Kuge Railway to the power grid in Ruoqiang area of Bazhou, Xinjiang, and eliminate the harm caused by harmonics and three-phase voltage imbalance to the grid, according to three-phase voltage imbalance investigation report of State Grid Bazhou Power Supply Company for the Ruoqiang power grid, PSASP software is used to simulate and calculate the three-phase voltage imbalance and voltage surging caused by electric locomotives passing through the Ruoqiang area. Based on this, a separate grid operation method is adopted to increase the number of electric railways and the electrical distance of the conventional user load, reduce the impact of the electric railway load on the conventional users. Using the Fluke 1760 three-phase power quality recorder, the harmonics and three-phase voltage unbalance of each site are tested on site and power quality evaluation is performed, and the treatment measures for the three-phase voltage unbalance of the Ruoqiang area power grid are put forward, which effectively solve the power quality problem after the Geku railway is connected to the Bazhou power grid.

Key words: Geku railway, Xinjiang power grid, power quality, governance measures

CLC Number:

TM561

KEPAIYITULLA·Tursun, JIAO Chunlei, LI Ming, CHEN Xu, XU Lei. Analysis and Control Measures of the Influence of the Grid Connection of Geku Electrified Railway on the Voltage Unbalance of Xinjiang Power Grid[J]. Journal of Electrical Engineering, 2022, 17(4): 318-326.

Figures/Tables 16

References 20

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序号	牵引变	额定电压/kV	牵引变相序	电网相序	短路容量/(MV·A)
序号	牵引变	额定电压/kV	牵引变相序	电网相序	2019年设计数据	2021年设计数据
	SEKL	110	ABC	CAB	637	454
2	AEJS	110	ABC	BCA	538	266
3	WT	220	ABC	ABC	1 036	617
4	NEG	220	ABC	CAB	1 195	739
5	ML	110	ABC	BCA	578	365
6	RQ	110	ABC	ABC	1 422	805
7	YTK	220	ABC	CAB	478	1 234
8	KEDB	110	ABC	BCA	717	373
9	TGSB	110	ABC	ABC	711	635
10	TYZ	110	ABC	CAB	578	439
11	KD	110	ABC	BCA	1 095	822

序号	变电站名称	线路名称	运行方式调整前		运行方式调整后
序号	变电站名称	线路名称	最大值(%)	95%概率值(%)	最大值(%)	95%概率值(%)
1	110 kV QL变	LN线	5.16	3.07	4.32	2.24
2	220 kV TD变	TD牵一线	6.33	2.96	8.55	3.63

序号	牵引站	线路名称	设计最大臂电流/A
1	SEKL	110SM牵一线	694.75
2	AEJS	110MA牵一线	692.25
3	WT	220ZW牵一线	1377.3
4	NEG	220ZN牵一线	691.88
5	ML	110TDM牵一线	692.82
6	RQ	110TDR牵一线	657.28
7	YTK	220LY牵二线	347.15
8	KEDB	110LKK牵一线	347.36
9	TGBS	110LKT牵一线	693.81
10	TYZ	110WT牵二线	644.08
11	KD	110HK牵线	688.33

母线名	各站负序电压不平衡度(%)
母线名	TD分列运行	TD和LB分列运行	某水泥厂由且末接带
SEKL	22.75	27.91	16.75
AEJS	24.64	29.58	18.72
WT	20.57	25.98	14.49
NEG	19.7	25.2	13.58
ML牵引站	19.7	25.2	10.27
RQ牵引站	17.7	23.43	8.06
YTK	9.63	16.36	7.53
KEDB	8.02	8.73	6.92
TGBS	7.63	8.34	6.54
TYZ	3.33	3.33	3.28
KD	3.15	3.28	2.96
QM11	22.66	27.84	16.65
QM21	21.17	26.51	15.09
YZ21	19.52	25.05	13.39
TD21	15.03	21.09	8.76
TD11	17.32	23.09	7.65
QL11	4.2	2.2	7.22(QL12为0)
RQ水泥11	4.19	2.19	0
TRRQ风	2.84	0	4.9
ZY	3.66	1.91	0(ZY12为5.76)
DTRQ风	3.01	1.57	4.77

牵引站名称	牵引供电线路名称	最大三相电压不平衡度(%)	负序电流/A	负序电流限值/A
SEKL	110 kV MS牵一线	7.89	130	99(65)
AEJS	110 kV MA牵一线	7.94	168	62(41)
WT	220 kV ZW牵一线	6.48	65	64(42)
NEG	220 kV ZN牵一线	6.32	47	77(50)
ML	110 kV TDM牵一线	6.28	186	79(52)
若羌	110 kV TDR牵一线	6.33	138	152(99)