Transcript Contingency Plan for NR Gandhi

Salient Features
Northern Regional Power System
CONTINGENCIES
Welcome
IN
GRID OPERATION

Largest sized hydro unit (180 MW at Chamera) in the
country
MONITORING HEALTH OF THE GRID

GRID DEFINITION
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PERFORMANCE INDICES
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FREQUENCY VARIATION
 VOLTAGE VARIATION
PROBABLE REASONS FOR GRID CONTINGENCIES

EQUIPMENT FAILURE
 WEAK TRANSMISSION SYSTEM

OPERATIONAL ERROR
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LOW FREQUENCY/ VOLTAGE

HIGH FREQUENCY/ VOLTAGE
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GRID INDISCIPLINE
NR GRID : BRIEF INTRODUCTION
• Wide spread transmission network
• Large Installed capacity ~ 28243 MW
-with thermal hydro mix ~ 69:31
• Wide variation in peak-off peak demand
TYPICAL FEATURES OF
NORTHERN REGIONAL GRID

Large number of constituents

Wide variation in demand
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Multiplicity of generating sources
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Critically loaded transmission network
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Important and crucial Loads
CONTINGENCIES SPECIFIC TO NR GRID and
ACTION PLAN TO MEET THESE
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Outage of Rihand – Dadri HVDC Pole (s)
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Outage of 400 kV circuit (s) in parallel
AC network through UP
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Outage of Trunk Lines between UP and
BBMB systems ….

Critically Low System Frequ. Conditions …
PROBABLE CONTINGENCIES
IN NORTHERN GRID
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Critically Low Voltage Conditions ….
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Critically High System Frequency
Conditions ….
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Critically High Voltage Conditions ….
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Outage of 400 kV Dadri – Mandola Circuit (s)
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Disturbance / Trippings in J&K System ...
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