Sensitivity study on the stray voltage of low voltage residential networks

Abstract

Stray voltages have always been a power quality concern to utility companies and customers. The long-term exposure to sufficient stray voltage can be harmful to human being's and animals' health. The stray voltage in the low voltage network is generally related to the load unbalance, grounding condition and network structure. Through analytical study and detailed system simulations, this paper makes a sensitivity study on how serious these factors affect the stray voltage in low voltage networks. Therefore some recommendations can be formulated to prevent the excessive stray voltage. On the other hand, this paper also provides guidance on how to identify the cause of excessive stray voltage incidence if it is detected.