TRANSMISSION LINES DESIGN and ELECTRICAL ENGINEERING HUB

  Ferranti Effect vs. Corona Effect vs. Reactive Power Effects A complete technical comparison for long AC transmission lines This is a new, standalone authority article , explaining how these three major AC phenomena differ, how they interact, and how engineers analyze them. Highly optimized for search engines and excellent as an anchor post. If you want Blogger-ready HTML , just tell me after. 4 ⚡ 1. Introduction Long AC transmission lines exhibit several electrical phenomena that affect voltage, power flow, stability, and insulation requirements. Three of the most important are: Ferranti Effect — voltage rises at the receiving end Corona Effect — ionization of air around conductors Reactive Power Effects — charging currents, VAR flow, power factor challenges These phenomena are often confused, but they arise from different mechanisms , have different impacts , and require different mitigation strategies . This article gives a deep technical comparison. ...

The Ferranti Effect: A Complete Technical Guide Why sending-end voltage becomes higher than receiving-end voltage on long, lightly loaded AC transmission lines 4 🔍 1. What Is the Ferranti Effect? The Ferranti Effect is a phenomenon where the receiving-end voltage of a long AC transmission line becomes higher than the sending-end voltage , even though no mechanical tap-up or control action is applied. This effect occurs when: The line is long (typically > 200 km for EHV AC) The line is lightly loaded or open-circuited The system voltage is high (≥ 220 kV) In short: 👉 Light load + long AC line = voltage rise at the receiving end Because the line’s distributed capacitance draws a leading charging current, causing voltage amplification toward the receiving end. ⚙️ 2. Why the Ferranti Effect Happens Long AC lines behave like distributed RLC circuits . When there is little or no load: 1️⃣ The line capacitance draws a leading charging current Transmission lines have inherent...

  Top 5 Worst Transmission Line Disasters in History Causes, technical failures, cascading effects, and engineering lessons learned This article focuses on the largest, most disruptive, and most studied failures involving overhead transmission lines—due to storms, ice, fire, earthquakes, design flaws, and systemic weaknesses. If you want the Blogger-ready HTML , tell me after reading. 🌩️ TOP 5 WORST TRANSMISSION LINE DISASTERS IN HISTORY 4 ⚠️ 1. North American Northeast Blackout – 2003 (USA & Canada) Impact: 55 million people affected Cause: Transmission line contact with trees + grid instability Region: Ohio, Michigan, Ontario, New York Duration: 2–4 days (some areas 1 week) Outage Size: 61,800 MW lost The 2003 blackout is the most studied transmission-related disaster in history . Root Transmission-Line Failures A 345 kV line sagged into overgrown trees due to inadequate vegetation management . Three more lines tripped sequentially under overload. ...