Scribd
Upload
43 views2 pages

Unit 2 Psoc 2mark

The document outlines key concepts in power systems, including the differences between load curves and load duration curves, and the importance of load shedding and islanding. It also discusses the requirements for a good power system, the necessity of voltage and frequency regulation, and the roles of Regional Load Despatch Centres. Additionally, it covers conditions for generator parallel operation, the need for load forecasting, and concepts like maximum demand, demand factor, spinning reserve, and deregulation.

Uploaded by

sudalaim675
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
43 views2 pages

Unit 2 Psoc 2mark

The document outlines key concepts in power systems, including the differences between load curves and load duration curves, and the importance of load shedding and islanding. It also discusses the requirements for a good power system, the necessity of voltage and frequency regulation, and the roles of Regional Load Despatch Centres. Additionally, it covers conditions for generator parallel operation, the need for load forecasting, and concepts like maximum demand, demand factor, spinning reserve, and deregulation.

Uploaded by

sudalaim675
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
You are on page 1/ 2

Power System Basics - CO1 (K1 & K2 Level)

1. Load Curve vs Load Duration Curve - Load Curve: Graph showing variation of electrical load vs time. -
Load Duration Curve: Load values rearranged in descending order with respect to time.

Difference: | Load Curve | Load Duration Curve | |------------|---------------------| | Shows load vs time
chronologically | Shows load vs time in descending order | | Used for operational analysis | Used for
planning and capacity assessment |

2. Load Shedding and Islanding - Load Shedding: Intentional reduction of electrical load when demand
exceeds supply. - Islanding: Part of the system operates independently when disconnected from the main
grid.

3. Requirements of a Good Power System - Reliability - Flexibility - Efficiency - Stability - Power quality
(voltage and frequency regulation) - Safety - Economic operation

4. Necessity of Voltage and Frequency Regulation - Ensures proper operation of devices - Maintains
system stability - Prevents equipment damage - Meets grid standards

5. Roles of RLDC & Examples - Roles: - Monitor inter-state transmission - Frequency regulation - Power
scheduling - Examples: - NRLD (Northern Regional Load Despatch Centre) - SRLDC (Southern Regional Load
Despatch Centre)

6. Conditions for Parallel Operation of Generators - Equal voltage magnitude - Same frequency - Identical
phase sequence - Phase angle synchronization

7. Need for Load Forecasting - Planning generation and transmission - Reliable and economic operation -
Prevent shortages and surpluses

8. Components of Speed Governing Mechanism - Speed sensor/governor - Control valve or actuator -


Linkage system - Flyball mechanism (mechanical) - Electronic control unit (modern)

1
9. Maximum Demand and Demand Factor - Maximum Demand: Peak power requirement in a specific
period. - Demand Factor:

Maximum Demand
Demand Factor =
Connected Load

10. Spinning Reserve and Deregulation - Spinning Reserve: Extra capacity online and ready for
immediate use. - Deregulation: Introduction of competition by reducing government control in electricity
sector.

You might also like