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JSW ENERGY BOLT | ISSUE 2
SHOLTU - BASPA-II Sholtu - Baspa-II
Upgradation Of Turbine Sensors
How and why was the problem How was the problem Solved?
identified?
Our prime focus was to eliminate the
Generator output power and speed is cause of moisture ingression. Due to
regulated as per grid requirement and design constraints, we could not change
regulation is achieved by varying the input the route of sensors from under water
of water to the turbine. area. We had discussions with vendors
regarding the issue and they provide the
Water input is controlled by set of nozzles
details of different type of upgraded
and deflectors and their Position
sensors available in market having
Feedback is transferred to governor
advance features.
through feedback sensors for control
purpose. These sensors are fitted in under After detailed technical survey and looking
water parts assembly and protected by into the compatibility with existing
steel enclosure pipes for strength against associated systems, a new upgraded
high water stresses. sensor was selected which has inbuilt
cable without any terminal joint and high
It was observed that when machine is
IP class protection for moisture ingression.
under continuous run for long duration,
It will minimize the risk of moisture
condensation takes place in pipes and
ingression
moisture travels to terminal point of cable
and sensors. It causes failure of feedback
signal and leads to tripping of unit.
Old Sensor having Terminal joint New Sensor with integrated Cable
(Space For moisture accumulation) – No Joint
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