IEEE 1207-2004 pdf download IEEE Guide for the Application of Turbine Governing Systems for Hydroelectric Generating Units
1.Overview
1.1 Scope
This guide is intended to complement IEEE Std 125-1988, providing application details and addressingthe impact of plant and syster features on hydroel ectric unit governing performance.
1.2 Purpose
The purpose of this guide is to provide guidance for the design and application of hydroelectric turbinegoverning systems. There is a heightened awareness within the electric utility industry of the importance inthe effective applicati on of governing systems for dynamic stability. The need exists to provide guidance inthe efective governing system applicati on for a beter understanding among users. Present standards do notadequately address this need.
2.References
This guide shall be used in conjunction with the following publications. When the following specificationsare superseded by an approved revision, the revision shall apply.
ANSl/ASME Std PTC29-1980, Speed-Governing Systems for Hydraulic Turbine- Generator Units
IEC 60308 (1970-01), International code for testi ng of speed governing systems for hydraulic turbines.
IEC 61362 (1998-03), Guide to specification of hydraulic turbine control systems
3. Definitions
For the purpose of this guide, the following terms and definitions apply. The Authoritative Dictionary ofEEE Standards Terms, Seventh Edition (B23 should be referenced for terms not defined in this clause.
3.1 beta ratio: A measure of the efficiency of a hydraulic oil filter, defined for a specific particle size as theratio of the number of particles of the specified particle size that are trapped by the filter to the number ofparticles that pass through the filter.
3.2 damping ratio: This ratio of a second-order closed-loop control system is defined by:
=1-(@/w,)
where
is the damping ratio.
is the damped natural frequency of the system response after a step change,0dis the undamped natural frequency of the system response after a step change.w
This ratio is a measure of how oscillatory a control system is in responding to a step change. A controlSystem with a damping ratio of 1.0 is critically damped, with no oscillatory action and no overshoot on theinitial transient after a step change. A control system with a damping ratio of 0.0 is undamped, resulting incontinuous oscillatory action.
3.3 electrohydraulic governor (sometimes called an electric-hydraulic governor): A turbine governingsystem that uses either analog electronic or digita electronic circuitry to develop the setpoint signal that isused to position the control actuators on the hydroelectric turbine. An electrohydraulic interface is used toconvert the electronic setpoint sianal into a hvdraulic oi flow from a hvdraulic servo valve svstem, Thehvdraulic servo valve svstem determines the position of the turbine control actuators
IEEE 1207-2004 pdf download
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