Protection scheme for remote private substation with small generator

Connections of private substations to utilities are made more complicated with the addition of private-owned generation facilities. The choice of relays and their placement must be made to ensure adequate… Read more

Dec 12, 2018 | Power Substation

Typical utility-consumer interconnection configurations

The utility-consumer interconnection provides the path for power flow between supplier (utility) and user (consumer). The interconnection may comprise one or more circuits and is assumed to include voltage transformation…. Read more

Dec 10, 2018 | Power Substation

The logic behind switchgear interlocking systems in substations

Switchgear interlocking is installed to protect both the equipment and the operator from dangerous situations caused by incorrect equipment operation. It can be categorized as operational interlocking and safety, or…...

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Dec 07, 2018 | Premium Content ♛

Protection Of The Power System Heart – The Generator

This technical article gives key points about the generator protection. To recover the generator from various kinds of faults, the generator protection scheme of the plant must be designed in such… Read more

Dec 05, 2018 | Energy Generation

The Essentials Of Current Transformers In Power Circuits (Theory and Practice)

If the voltage or current in a power circuit are too high to connect measuring instruments or relays directly, coupling is made through transformers. Such measuring transformers are required to… Read more

Dec 03, 2018 | Electrical Lectures

Connection schematics of voltage transformers for protective applications

Voltage transformers would have primaries that are either connected directly to the power system (VTs) or across a section of a capacitor string connected between phase and ground (coupling capacitor… Read more

Nov 28, 2018 | Protection

10 unbalance detection schemes for removing failed capacitor bank from the system

The main purpose of an unbalance detection scheme is to remove a capacitor bank from the system in the event of a failure and fuse operation. This will prevent damaging… Read more

Nov 26, 2018 | Energy and Power

Main components of a Gas Insulated Substation (GIS) you should know about

Gas insulated substations (GIS) use circuit breakers, disconnect switches and grounding switches, and have various means of indicating their position, either opened or closed, so the same as in AIS…....

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Nov 23, 2018 | High Voltage ♛

Coordinating study in protection of utility supply line, transformer and plant main bus/feeder

The installation of a dedicated substation to serve a plant actually involves an interface between the utility and the plant. Close coordination between utility and plant personnel is essential so… Read more

Nov 21, 2018 | Power Substation

What is polarity and why it’s important for transformers and protection relays

Polarity is very important for the operation of transformers and protection equipment. A clear understanding of polarity is useful in understanding and analyzing of transformer connections and operation as well… Read more

Nov 19, 2018 | Electrical Lectures