Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

Core Standards for Calibration of Online Power Quality Monitoring DevicesThe calibration of online power quality monitoring devices follows a comprehensive standard system, encompassing mandatory national standards, industry technical specifications, international guidelines, and requirements for calibration methods and equipment. The following provides a structured overview with practical recommendations for real-world applications.I. Core Domestic Standards1. DL/T 1228-2023 – Technical Require

Transformers and Power Quality MonitoringThe transformer is a core component of the power system. Power quality monitoring is fundamental to ensuring transformer safety, improving system efficiency, and reducing operation and maintenance costs—directly impacting the reliability and performance of the entire power network.Why Perform Power Quality Testing on Transformers? Ensure Safe Transformer OperationPower quality issues—such as harmonics, voltage fluctuations, and load imbalance—can cause ov

A novel PET for a distribution grid called a flexible power distribution unit is proposed in this paper, and the energy exchange mechanism between the network and the load is revealed. A 30 kW 600 VAC/220 VAC/110 VDC medium-frequency isolated prototype is developed and demonstrated. This paper also presents key control strategies of the PET for electrical distribution grid applications, especially under grid voltage disturbance conditions. Moreover, stability issues related to the grid-connec

This paper proposes a novel configuration of a dual UPQC supplied by a dual photovoltaic (PV), hereinafter referred to as 2UPQC-2PV,to improve the power quality performance of a single-phase 220 V/50 Hz distribution system. The 2UPQC-2PV configuration is proposed to anticipate the possible failure of both inverters in one of the UPQC circuits. The PV array replaces the DC-link capacitor to maintain its voltage connected to the DC-link of the UPQC constant while at the same time supplying active

A novel PET for a distribution grid called a flexible power distribution unit is proposed in this paper, and the energy exchange mechanism between the network and the load is revealed. A 30 kW 600 VAC/220 VAC/110 VDC medium-frequency isolated prototype is developed and demonstrated. This paper also presents key control strategies of the PET for electrical distribution grid applications, especially under grid voltage disturbance conditions. Moreover, stability issues related to the grid-connected