Power Plant Integrated Automation System

1> Protection function * Generator differential protection (vertical and horizontal ) * Three zone multi-voltage closedown over-current protection * Negative sequence over-current protection * High/low voltage protection * Rotor single-point/two-point ground protection * Reverse power protection (steam-turbine generator) * Loss of excitation protection * Over load alarm * Unbalance voltage protection (steam-turbine generator) * Zero sequence over voltage protection * High-frequency protection * Low-frequency protection * Non-electrical protection * Others (depend on the users) 2> Telemtering function All electric quantity use Fourier Algorithm to do AC sampling directly by high accuracy small PT and CT, which has high sampling accuracy and can measure the parameter of loop U, I, P, Q, COS, F, kWh, kvarh and so on. And it can display measured primary actual value and accept measured value of transformer and axletree temperature from temperature transducer, and measure value of press, flux, water lever from transducer. 3>. Remote signal function * External remote signal: Switch signal such as switch position, breaker position, manual-switch position, accumulated energy status, generator state, auxiliary devices status and so on. * Accident remote signal: Electric accident signal of differential, over voltage, lose-excitation,quick breaking, overcurrent, heavy gas and others. Generator accident signal of axletree overtemperature and low oil press. * Fault signal: Signal of over-load, slight gas, high-temperature, earthed, control loop break, axletree high-temperature, cooling water break. * State of remote signal: Signal of protecting action, abnormal unit, remote signal changing, device reset. The type of remote signal can be set freely (locale configuration).4>. Remote control function Breaker trip/close, generator start/stop automatically, vane-opening increase/decrease, rotate speed up/down, sluice gate and valve control.