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ElectricalPower System
PrevNext

Interconnected power system is represented by

A

Electrical Network

B

Electrical Grid

C

Electrical System

D

None of above

Correct Answer

тЪЩя╕П TE тАв Technical Concept & PrincipleElectricalPower System
Option B

Electrical Grid

Quick Summary:

An interconnected power system, where multiple power plants and load centers are linked together, is referred to as an Electrical Grid. This arrangement allows for the sharing of power reserves, improved reliability, and economic dispatch of generation resources.

тЪЩя╕ПTETechnical SolutionConcept & Principle
ЁЯТб Explanation

An interconnected power system, where multiple power plants and load centers are linked together, is referred to as an Electrical Grid. This arrangement allows for the sharing of power reserves, improved reliability, and economic dispatch of generation resources.

ЁЯФв Key Formulas

Ptie=тИгV1тИгтИгV2тИгXsinтБб(╬┤1тИТ╬┤2)P_{tie} = \frac{|V_1||V_2|}{X} \sin(\delta_1 - \delta_2)PtieтАЛ=XтИгV1тАЛтИгтИгV2тАЛтИгтАЛsin(╬┤1тАЛтИТ╬┤2тАЛ) тАФ Power flow equation between two interconnected areas

тЪЩя╕П Working Principle

The electrical grid operates on the principle of synchronous operation where all interconnected generators run at a common frequency. By connecting diverse generation sources to a common network, the system can balance supply and demand dynamically, allowing surplus power in one region to offset deficits in another while maintaining voltage and frequency stability.

ЁЯУМ Key Points
  • тЦ╕

    Grid interconnections provide redundancy and increase overall system reliability.

  • тЦ╕

    Interconnected grids allow for the optimal use of diversified energy resources (hydro, solar, wind, thermal).

  • тЦ╕

    Frequency maintenance is a collective responsibility of all generators synchronized to the grid.

тЬЕ Advantages
  • тЦ╕

    Higher reliability due to redundant supply paths.

  • тЦ╕

    Better frequency regulation and stability.

  • тЦ╕

    Economy of scale through economic load dispatch.

тЭМ Disadvantages / Limitations
  • тЦ╕

    Risk of cascading failures (blackouts) across a wide area.

  • тЦ╕

    Increased complexity in protection and control systems.

  • тЦ╕

    Requirement for high-speed communication for AGC (Automatic Generation Control).

ЁЯЫая╕П Applications / Uses
  • тЦ╕

    National and regional electrical grids.

  • тЦ╕

    Integrated power markets.

  • тЦ╕

    Renewable energy integration platforms.

ЁЯУД Additional Information
  • тЦ╕

    The term 'Electrical Network' typically refers to the physical circuit layout, while 'Electrical Grid' refers to the functional interconnected power system.

  • тЦ╕

    In India, the National Grid is a massive synchronous interconnection of regional grids operating at 50 Hz.

ЁЯУК Diagram / Illustration
Interconnected Power Grid SchematicGen Station AGen Station BLoad Center
тЬЕ

B is correct тАФ An interconnected power system is technically defined as an Electrical Grid because it enables synchronized energy distribution across vast geographic regions.

Core Concepts Used
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Synchronous stability Load frequency control Economic dispatch
ЁЯТб EXAM TIP

Always remember that in an interconnected grid, frequency is the global indicator of real power balance; if f<50Hzf < 50\text{Hz}f<50Hz, generation is less than demand.

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