Measurement of dead band and dead time in frequency regulation Sample Clauses

Measurement of dead band and dead time in frequency regulation. The dead band of frequency regulation shall be measured in all power plant machineries participating in reserve maintenance. If the power plant machinery is such that the dead band for its turbine controller can be set as a parameter, the functioning of regulation shall be tested outside the set dead band so that the turbine controller is supplied a step change which is slightly greater than the dead band, and the consequently activated active power shall be measured for three minutes from the step change. If the power plant machinery is such that the dead band for frequency regulation cannot be set, the measurement shall be carried out by supplying a stepped frequency change to the turbine controller, and the consequently activated active power shall be measured. The activated active power shall be measured for three minutes from the step change. The first frequency change to be used is ±10 mHz, after which the measurement shall be carried out, if necessary, at four other points at steps of ±10 mHz up to a frequency deviation of ±50 mHz. The measurement shall be carried out using the same power levels as in the measurements of the frequency controlled normal operation reserve and disturbance reserve in accordance with Figure 4. The dead band of the power plant machinery is the lowest frequency change to which the machinery responds so that the activated active power can be measured. The measurement shall be carried out both with and without clearance. If different values are obtained for the dead band with different power levels, the average of the dead bands measured shall be applied to the Agreement. If the power plant consists of at least two power plant machineries which are similar in terms of their power, structure and the features of the turbine controller, the dead band can be measured in one of these machineries if so agreed upon between Fingrid and Reserve Holder separately, and the result obtained shall be applied to all power plant machineries at the same magnitude.
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