PowerPoint Presentation On ESSAR

Presentation On Essar Power Limited

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ESSAR Presentation Transcript:

1. COMPANY PROFILE
Essar is one of India's largest corporate houses with leadership positions in the high-growth infrastructure sectors of Steel, Energy, Power, Communications, Shipping & Logistics, and Construction. Essar Power Holdings Ltd. was established in1991. The combined cycle power plant in Hazira with a generating capacity of 515MW is strategically located at Hazira in the state of Gujarat. It supplies power to Gujarat State Utility (300MW) and Essar Steel (215MW).

2. GENERATOR PROTECTION
Generator Differential Protection Generator rotor earth fault protection Generator negative phase sequence current protection Stator over voltage protection Stator under voltage protection Under frequency relay Overall differential relay

3. BUS-ZONE PROTECTION
Differential Current Protection High Impedance Relay Scheme Frame leakage Protection

4. SlOW CHANGEOVER CRITERION
System kept in auto mode Bus voltages may not be synchronous. Incomer / Bus coupler breaker trips. NO overcurrent on the bus which has tripped. (ie: no bus fault.) Voltage of the tripped bus less than 70%. Time taken for changeover is about 1.2 sec.

5. QUICK CHANGEOVER CRITERION
System kept in auto mode. Bus voltages shall be synchronous. Incomer / Bus coupler breaker trips. NO overcurrent on the bus which has tripped. (ie: no bus fault.) Voltage of the tripped bus less than 90%. Time taken for changeover is less than 100 mS

 6. INFRARED TECHNOLOGY
Using advanced infrared technology locate and identify problems not visible to the eye.  Verify many items, giving  hard copy documentation of the conditions inspected. A MIKRON infrared camera with temperature measurement and recording capabilities is used to produce images from the infrared spectrum.  Infrared radiation consists of electromagnetic wavelengths greater than visible light and shorter than microwaves.   All materials whose surface temperature is above absolute zero (-273 0C) emit infrared radiation; infrared radiation can be correlated to the objects surface temperature.   Temperature differences are shown by color/gray scale with temperature scale shown to the right..

7. THERMOGRAPHY
Definition of Infrared Thermography Infrared thermography is equipment or method, which detects infrared energy emitted from object, converts it to temperature, and displays image of temperature distribution. To be accurate, the equipment and the method should be called differently, the equipment to be called as infrared thermograph and the method to be called as infrared thermography. It is an electromagnetic wave.Wavelength is 0.7µm or longer Wavelength is 1mm or less = Frequency is 300GHz or more.

 8. Thanks.