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

As a front - line fault diagnosis and detection worker, I am well aware that with the expansion of the scale of photovoltaic power stations, the faults of box - type transformers, as one of the key equipment, have a profound impact on the stable operation of the system. This paper focuses on using advanced artificial intelligence algorithms and integrating data analysis technology to improve the accuracy and efficiency of fault diagnosis of box - type transformers, and to build a solid technical

1 Overview of Photovoltaic Power Generation ProcessIn my daily work as a frontline operation and maintenance technician, the photovoltaic power generation process I encounter involves connecting individual solar panels into photovoltaic modules, which are then paralleled through combiner boxes to form a photovoltaic array. Solar energy is converted into direct current (DC) by the photovoltaic array, then transformed into three-phase alternating current (AC) via a three-phase inverter (DC-AC). Su

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

As a charging pile designer deeply involved in industry projects, I've witnessed firsthand how electric vehicles (EVs) have become a pivotal force in China's new energy landscape. Decades of advancements in electronics have laid a solid foundation for EV development. The integration of V2G, energy storage technologies, and high-performance batteries not only facilitates battery swapping services but also drives the convergence of photovoltaics, energy storage, and intelligent charging systems&am

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

1. Fault CasesCase 1 (July 16, 2024)A district manager got a report of a charging pile outage at a square, affecting users and appliances. I, with O&M staff, found the pile was dead but charged EVs normally—yet the neutral wire/cabinet was live.Inspection steps: Relays, contactors, AC contactors checked → switching power supply had no output. Inverter, fuse, AC power tested → live current detected. Internal check: AC power and modules normal; secondary wiring inta

As new energy electric vehicles become increasingly popular, the number of supporting public charging piles is growing year by year. Whether the measurement value of AC charging piles for electric vehicles is accurate is directly related to the vital interests of the vast number of electric vehicle owners. So, conducting regular mandatory inspections of charging piles is particularly important. Below, combined with relevant regulations and practical work, I’ll share some experience and

As a frontline designer, I work on EV charging piles daily. Amid worsening global climate change and China’s rapid economic growth, green mobility like e - bikes and electric cars has boomed, yet charging issues have become a focal concern. The risky “Bypass Wire” charging has spurred huge demand for professional piles. Having taken part in the CNPC First Construction residential charging pile renovation, I’m sharing my hands - on experience.I. Industry Co

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

I. Core Value Proposition✅ Energy Cost Optimization: Reduce electricity expenses by 30%-50% through peak-valley arbitrage (EU peak/off-peak spreads up to &euro;0.25/kWh) ✅ Power Reliability: Seamless backup power switching (<20ms response) for critical operations ✅ Renewables Integration: Increase solar self-consumption to >90%, minimizing curtailment losses ✅ Carbon Reduction: Achieve ~500 tons CO₂e annual reduction (1MW/2MWh system reference) II. Key Application Scenarios & Solut