Web admin Introduction Transient stability is a critical aspect of power system operations, ensuring that the system can withstand and recover from disturbances such as faults or sudden load changes. Understanding and maintaining transient stability is essential for preventing widespread blackouts and ensuring a reliable supply of electricity. Fundamentals of Transient Stability Basics of Power System Stability … Read more
Introduction Power system stability is a fundamental aspect of modern power grids, ensuring that electrical systems can operate reliably and efficiently under various conditions. Understanding and maintaining power system stability is crucial for preventing blackouts, minimizing disruptions, and ensuring a continuous supply of electricity. Types of Power System Stability Rotor Angle Stability Rotor angle stability … Read more
Basic Concepts Protection coordination in simple terms may be understood as relay trip time coordination. When some fault occurs in low voltage side say 33kv , we need a system to ensure that fault should get cleared in 33kv side only without causing any disturbance in higher voltage level- 132kv, 220kv etc. Also the transmission … Read more
To Troubleshoot poor IR (Insulation Resistance) values in a transformer involves a systematic approach to identify and resolve the underlying issues. While testing and commissioning of transformer we often encounter that Insulation resistance (IR) values are not very good. Here’s a step-by-step guide for troubleshooting poor Insulation Resistance values: 1. Preliminary Checks 2. Initial Testing … Read more
The DC earth fault relay is designed to monitor unearthed DC systems for insulation deterioration or faults. A DC earth fault relay is a protective device used in DC power systems to detect earth faults (also known as ground faults). DC voltage is required in a substation for protection, breaker operation and monitoring purpose and … Read more
We know that electrical power has two components-Real power(W) and Reactive power (VAR) .Reactive power compensation improves system voltage levels, enhances grid stability margins, reduces line losses and results in economic benefits. Reactive power is defined as the amount of power that remains unused and gets generated within an AC circuit or system by the … Read more
What are HVDC Lines? HVDC stands for High Voltage Direct Current. Unlike the traditional Alternating Current (AC) systems, HVDC uses direct current to transmit electricity over long distances. This technology, although not new, has seen significant advancements and wider adoption in recent years. Brief History The concept of HVDC dates back to the early 20th … Read more
Auto-reclosing As the name suggests Auto re-closing is a scheme/mechanism where a particular breaker pole (phase) Automatically re-closes after tripping on transient (temporary) fault in a transmission line. Normally in 132kv or below voltage transmission lines ,when a fault occurs in the line ,all its poles (phases) are tripped which results in power interruption, however … Read more
Harmonics Harmonics in Power system or any other system are a series of sinusoidal waveforms that are integer multiples of a fundamental frequency. Harmonics are defined as an unwanted higher frequency component which create distortion in the fundamental waveform. Harmonics typically have a lower amplitude than the fundamental frequency. Fundamental Frequency: This is the lowest … Read more
What is Inrush current? Inrush current is the instantaneous high input current drawn by an electrical equipment when it is turned-on. This arises due to the high initial currents required to charge the capacitors and inductor or transformers in the equipment. This current is also known as the switch–on surge, or the input surge current. … Read more