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

Sizing Principles and Technical Parameters of Photovoltaic TransformersSizing photovoltaic transformers requires a comprehensive consideration of multiple factors, includingcapacity matching, voltage ratio selection, short - circuit impedance setting, insulation class determination, and thermal design optimization. The key sizing principles are as follows:(I) Capacity Matching: Fundamental for Load BearingCapacity matching is thecore prerequisitein sizing photovoltaic transformers. It requires a

1. Specificities and Testing Requirements of Photovoltaic TransformersAs a new energy systems technician, I recognize photovoltaic transformers' unique design and application traits: Inverter - output AC carries abundant 5th/7th - order odd harmonics, with PCC harmonic current distortion reaching 1.8% (higher voltage distortion under low load), causing winding overheating and accelerated insulation aging. Photovoltaic systems use TN - S grounding, requiring reliable N - phase output from the sec

As a technician deeply involved in charging pile testing on the frontline, my daily work makes one thing crystal clear: as people’s living standards rise, the demand for vehicles surges. Coupled with the growing popularity of environmental protection concepts, the electric vehicle (EV) industry is booming. Charging piles, as the “lifeline” of electric vehicles, directly determine whether EVs can operate stably and safely. Put simply, our job in testing is to &ld

1. Detection Technology for Electric Vehicle Charging PilesEV charging piles are primarily divided into two categories:DC charging pilesandAC charging piles. Let's start with DC charging piles: they communicate with the EV's battery management system (BMS) and directly charge the power battery through the DC charging interface. AC charging piles, on the other hand, rely on the EV's AC charging interface and use the vehicle-mounted charger to complete the charging process. These two types of char

As a frontline tester, I work with industrial and commercial energy storage systems daily. I know firsthand how critical their stable operation is for energy efficiency and business profitability. While installed capacity grows rapidly, equipment failures increasingly threaten ROI—over 57% of energy storage plants reported unplanned outages in 2023, with 80% stemming from equipment defects, system anomalies, or poor integration. Below, I share practical testing insights for the five co

As home energy storage evolves from "backup power" to "energy manager,"smart control appsare becoming the command center for households worldwide. More than a remote switch, it’s your intelligent brain for energy freedom and bill reduction—Scenario 1: Blackout? Zero-Second Switch, Safety at Your Fingertips A midnight storm knocks out grid power—your phone lights up: ‘Backup activated. 32-hour runtime secured.’With apps likeHi-Smart Energy(from Hi

As a technician with years of experience in power voltage regulator testing, I know full well that power voltage regulators, as key equipment in power systems, directly impact power supply quality and system safety. As power equipment evolves toward greater intelligence and precision, the detection technology for voltage regulators has also been continuously advancing — shifting from traditional visual inspections to modern digital testing; and from single - parameter measurement to sy

1. IntroductionTo enhance the quality of power supply services, the power system continuously promotes the reform and upgrading of transformers. As a high - end and advanced equipment, pad - mounted transformers have been increasingly applied in the power system in recent years. Especially in regions like Mexico for projects with a voltage level of 23kV, they play a significant role due to their unique advantages. However, the relatively long installation and construction time has, to a certain

1. Scope of ApplicationThis technical specification applies to the installation of pad - mounted transformers.1.1 Construction Process1.2 Standard Construction Process Description2. Construction Preparation(1) Main Machinery and Tools Handling and Hoisting Tools: Truck crane, truck, winch, chain hoist, three - step rack, cribbing, steel wire rope, strap rope, rolling bar. Installation Tools: Bench grinder, electric welding machine, gas welding tools, electric hammer, adjustable wrench, hammer, p

In recent years, driven by policies and the enabling environment, the domestic new energy industry has achieved rapid development. A large number of photovoltaic (PV) projects have been introduced into the power market, and high-altitude PV projects are among them. If prefabricated cabin substations can be utilized scientifically and rationally, high-altitude PV projects can feature short construction cycles, quick commissioning, and relatively low investment levels. This is of great significanc