Active Load Participation in Automatic Balancing of Three-Phase Load Imbalance in Low-Voltage Substation Areas

doi:10.11930/j.issn.1004-9649.202212040

Abstract

Abstract:

In order to solve the problems of increased losses and reduced power supply quality caused by unbalanced three-phase loads, an automatic equalization method for three-phase load unbalance in low-voltage stations involving active loads is proposed. Based on the high-speed carrier technology of the power Internet of Things, the meter load data of the low-voltage station area is collected, and the load data is monitored and collected in real time. A three-phase load imbalance equalization control terminal is designed and the objective function is established. The pigeon swarm algorithm is used to solve the function to achieve automatic balancing control of three-phase load imbalance in the low-voltage station area, which has good control effects.

Key words: active load, data filling, commutation control, low voltage substation area

Zhiqiang HU, Yuanyu YE, Lingang YU, Dongwen WU, Tao HU. Active Load Participation in Automatic Balancing of Three-Phase Load Imbalance in Low-Voltage Substation Areas[J]. Electric Power, 2024, 57(2): 49-54.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202212040

https://www.electricpower.com.cn/EN/Y2024/V57/I2/49

Figures/Tables 6

Fig.1 Control terminal

Fig.2 Low voltage district

Table 1 Data of load branch

支路编号	无功功率/(kV·A)	相序	电压/V	电流/A
1	1.31	a	215	10
2	1.57	a	219	12
3	1.46	a	220	11
4	1.80	b	205	15
6	12.70	b	206	6
7	1.25	b	209	11
8	0.70	b	211	4
9	1.05	c	220	7
10	0.80	c	221	5

Fig.3 The degree of imbalance

Fig.4 The frequency deviation control effect of the proposed method

Fig.5 Results of voltage stability tests using different methods

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