
On December 29, 2024, with the energized operation of all equipment in the 750 kV Desert Substation, the 750 kV Dingzikou Transmission and Transformation Project, a supporting power grid project for the "Shagohuang" large-scale wind power and photovoltaic base in Northwest China's Qinghai, was completed and put into operation, adding another "green power highway" to the development and utilization of new energy and power supply in Qinghai Province. [pdf]

Aiming at the voltage and current measurement for battery banks in mobile communication base station, according to voltage characteristics of wide common-mode range, three methods including sampling with resistors, converting with analog optical coupler and differential subtractor based on amplifier are presented.For bi-directional current characteristic, both single and double amplifier methods are discussed respectively.Also, all the methods mentioned above are analyzed. [pdf]

This research focuses on the discussion of PV grid-connected inverters under the complex distribution network environment, introduces in detail the domestic and international standards and requirements on grid-connected inverter grid adaptability, and then analyzes in depth the impacts of the access point voltage changes, access point frequency changes, and access point harmonic changes on the inverters.Can grid-connected PV inverters improve utility grid stability? [pdf]

Power companies should monitor and manage the battery packs, battery management systems (BMS), energy management systems (EMS), energy storage converters (PCS), fire protection systems, network security, operating environments and other important electrical equipment of electrochemical energy storage power stations invested and operated by their companies, regularly analyze the safe operation status, strengthen early warning and emergency response of operation risks, and be able to timely warn and take effective measures to eliminate hidden dangers for equipment and systems with safety hazards. [pdf]

Definition: LFP 48V solar batteries refer to battery modules used in energy storage systems, which typically consist of 15 or 16 3.2V lithium iron phosphate (LFePO4) batteries connected together to form a system with a total voltage of 48 volts or 51.2 volts. 48V (51.2V) systems are commonly used in residential and commercial and industrial solar energy systems due to their higher voltage and relatively low current requirements, which reduces heat loss due to high current products and improves system efficiency. [pdf]
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