低压配电系统剩余电流保护与重合闸逻辑组合优化方法

徐寒, 朱三立, 张腾飞, 陈舒, 刘明祥

Optimization Method for Combination of Residual Current Protection and Coincidence Brake Logic in a Low-Voltage Distribution System

XU Han, ZHU Sanli, ZHANG Tengfei, CHEN Shu, LIU Mingxiang

表2 不同三相不平衡度下各相电流与剩余电流

Tab.2 Phase current and residual current at different three-phase unbalance degrees

样本序号	A相负荷/kW	B相负荷/kW	C相负荷/kW	I_A/A	I_B/A	I_C/A	I₀/mA	γ/%
1	2.55	2.55	0	9.96	10.03	0.068	37.41	99.36
2	3.40	1.28	0.43	8.08	7.13	2.760	38.81	65.89
3	6.80	2.55	0.85	16.06	14.21	5.470	39.15	65.95
4	5.95	1.70	2.25	16.22	9.87	12.390	30.33	39.19
5	10.20	0	0	26.54	0.08	0.080	75.19	70.51
6	7.51	2.55	0	14.94	14.91	0.071	49.53	99.53
7	6.00	6.00	0	23.45	23.52	0.070	37.62	99.71
8	4.50	1.28	0.55	9.13	7.60	3.580	43.11	60.85
9	5.10	0	0	0.26	0.08	0.080	74.82	70.46