Latest Overhead T&D Articles

Electric Power Distribution Delivery and Reliability

Electric power distribution is the process of delivering electricity from substations to end users through feeders, transformers, and service connections, reducing voltage from medium to low levels and enabling controlled power flow to customer loads. Electric power distribution is the process of delivering electricity from substations to end users by routing power through feeders, transformers, and service connections, while reducing medium-voltage levels to usable low voltage at the point of consumption. After electricity leaves the transmission system, it enters a distribution substation where voltage is stepped down to a medium level for local delivery. From this point, electric power distribution…

Electricity Transmission

Electricity transmission delivers high-voltage power from generating stations to substations across vast electrical grids. Using transmission lines, transformers, and substations, it ensures efficient energy transfer, grid stability, and reliable service to businesses and industries. Electricity Transmission Fundamentals History and Evolution of Transmission Early electricity networks in the late 1800s used direct current (DC), championed by Thomas Edison. However, DC was inefficient for long-distance delivery. Nikola Tesla and George Westinghouse pioneered alternating current (AC), which allowed voltage to be stepped up and down using transformers. This advantage made AC the global standard. Since then, transmission systems have expanded to…

Reliability & Protection in Utility Distribution

Reliability and protection in utility distribution are safeguarded through breakers, relays, automation, and fault isolation, ensuring grid stability, preventing outages, and providing safe, resilient power for residential, commercial, and industrial users. A Practical Guide to Reliability and Protection in Utility Distribution Part of enhancing reliability and protection in Utility Distribution involves harmonizing protection strategies with the overall network design, as discussed in our overview of electrical distribution systems. Utility distribution is where electricity meets the customer, and its reliability depends on strong protection strategies. Faults, equipment failures, and severe weather are inevitable — but with coordinated protection, utilities can minimize…

Overhead T&D, Direct Current Technology

Direct current technology delivers efficient DC power distribution via rectifiers, converters, and power electronics, enabling microgrids, energy storage, HVDC links, photovoltaics, and electric vehicle charging with reduced losses and improved reliability. Direct Current Technology Fundamentals Direct current (DC) is the preferred technology for moving large amounts of power across long distances. DC results in higher overall efficiency and reliability than an equivalently sized alternating current (AC) system moving the same amount of power. The Advantages of DC More efficient: Over long distances, DC transmission can move more power with less electrical losses than an equivalent AC transmission line. For…

Electrical Distribution System

An electrical distribution system is the portion of the electric power grid that delivers electricity from distribution substations to end users through feeders, transformers, and service connections operating at medium and low voltage levels. It forms the physical link between transmission supply and electrical utilization by stepping voltage down and distributing it across local networks. The system connects substations to loads through primary feeders and secondary circuits, which carry power from medium voltage networks to low voltage service points. This relationship defines how electrical energy moves from a bulk supply into a usable form without describing operational control or delivery…

Distributed Power Management for DER Control

Distributed power management coordinates DERs, storage, controllable load, feeder constraints, and microgrid response so operators can balance power flow, reliability, voltage support, and restoration without fragmented control decisions. Distributed power management is the control discipline that enables smaller electrical assets to respond as part of a single operating strategy rather than as separate resources pursuing separate objectives. The issue is not simply that power is now generated, stored, and controlled in more places. The issue is who sets the response priority when storage charging, load curtailment, export limits, and feeder constraints interact simultaneously. That matters because distributed assets do not…

Costly Interconnection Delays

Costly interconnection delays stall grid connection for solar, wind, and storage, driven by interconnection queue backlogs, transmission constraints, lengthy permitting, and network upgrade studies, inflating project CAPEX, financing risk, and PPA timelines. Costly Interconnection Delays and Their Impact on Workplace Safety Policy debates on solar incentives and valuation make headlines across the nation, but less attention is paid to the nuts and bolts of solar installation: the interconnection process.But the struggle there is very real. Take Hawaii, where the high volume of solar applications and the slow interconnection process slowed distributed solar installations two years ago. Eventually, the process…