LIU Jialin, XU Guangda, MAO Xiaodong, et al. A Low-cost Worst-case Power Quality Monitoring Method for Low-voltage Distribution Networks[J]. 2025, 53(11): 116-125.
LIU Jialin, XU Guangda, MAO Xiaodong, et al. A Low-cost Worst-case Power Quality Monitoring Method for Low-voltage Distribution Networks[J]. 2025, 53(11): 116-125. DOI: 10.20204/j.sp.2025.11014.
A Low-cost Worst-case Power Quality Monitoring Method for Low-voltage Distribution Networks
Existing power quality monitoring methods for low-voltage active distribution networks (LVADNs) often suffer from strong reliance on grid parameters and high deployment costs. To address these issues, this paper proposes a low-cost and low-parameter-dependency method for monitoring the worst-case power quality conditions. By establishing an electrical quantity coupling and propagation model, the proposed method can effectively characterize the distribution patterns of the worst voltage and current profiles in LVADNs with high penetration of photovoltaic systems, without requiring precise grid parameters. This enables the accurate identification of key monitoring locations. As a result, only a limited number of devices need to be deployed at critical nodes to identify the worst-case power quality scenarios in the regional distribution network. Hardware-in-the-loop experimental results demonstrate that the proposed method significantly reduces the number of monitoring devices, lowers system investment and engineering deployment complexity, and exhibits strong practical applicability.
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