Monday, January 29, 2024

Unit Shutdown Checklist

Dadri stage-1 Light up Preparation

LIST OF ACTIVITIES AFTER UNIT LIGHT UP

(WARM/HOT START UP AFTER TUBE LEAKAGE)

Dadri stage-1 after Light up checklist

LIST OF ACTIVITIES AFTER UNIT LIGHT UP

(WARM/HOT START UP AFTER TUBE LEAKAGE)

Dadri stage-1 After shutdown Work

ACTIVITIES AFTER UNIT SHUTDOWN (SHORT SHUTDOWN 8Hrs TO 72 Hrs) STAGE-1

1. After closing MS-1 & 2, isolate electrical supply.

Dadri Stage-1 Start up Write-up

SOP to avoid unit disturbance/tripping during litup/turbine rolling/unit synchronization

1. APH oil carryover probe to be checked hourly during light up. Oil gun having poor flame to be removed. APH soot blowing to continue till oil guns in service. CBD to be opened after boiler litup and closed as per chemistry clearance. SCAPH charging &Dearator heating / pegging to be done . Condensate dumping to be done.

Dadri stage-1 Turbine Interlock & Protection

Dadri stage-1 Turbine Interlock & Protection

Lub Oil Pr: Alarm=2.0 ksc. Trip=1.88 ksc Effect: Turbine Trips, Barring gear Protection Close,Vacuum Breaker Opens

Thursday, October 12, 2023

Dadri U-1 functional Loocation /Job Card Help

Functional loc. 1011-S1U01 Valid From 20.08.17
Description STAGE-1 UNIT-1

HP Bypass . LP Bypass Operation

Thursday, May 25, 2023

Dadri stage-1 Reserve Shut down Procedure

PROCEDURE FOR RESERVE SHUT DOWN OF STAGE-1 UNITS

PREPARATIONS

Dadri stage-1 : ST-1, ST-2 Both tripping

In case of both station transformer tripping following disturbance will be observed

SOP for Mills Operation along with Bio Mass

1) Mill Operating Parameters and Operation procedure:

Work Instructions

Start-Up After 8 Hours of Shutdown ( Hot start-UP)

Unit condition

1	At least 2 BCW pump in Serrvice
2	Both SAPH and PAPH Running
3	Turbine : On Barring (AOP,JOP,SOP, HPCF in service)
4	Generator: PW system, Seal Oil system, Gas system

TDBFP LOP protection and Auto Start

1. LOP A running if trips, LOP B takes start

2. LOP A running and LO dis Hdr manifold pr LT 8.4 ka, LOP takes start

3. LOP A running and LO dis pr at brg inlet LT 1.8 ka, LOP B takes start

4. If LO dis Pr at Brg inlet LT 1 ka, DCEOP starts

SCED Features

NLDC has opened a separate bank account called ‘National Pool Account (SCED)’. All payments to/from the generators and to the Discoms on account of SCED flow to/from the said National Pool Account (SCED)

Power Terminology

100MW for 24 Hrs = 2.4 MU (Million Units)
Ancillary services refer to functions that help grid operators maintain a reliable electricity system.
Ancillary services maintain the proper flow and direction of electricity, address imbalances between supply and demand, and help the system recover after a power system event