On-Line Estimation of Synchronous Generator Parameters Using a Damper Current Observer and a Graphic User Interface

Abstract

This paper presents a method to identify synchronous generator parameters from on-line data measured at the terminals of the machine. An observer for estimation of synchronous generator damper currents is designed and implemented. The observer-estimator is used in a Graphic User Interface (GUI) application. Possible internal machine fault conditions can be detected and remedial action can be applied. Noise filtering and bad data detection and rejection are implemented to increase the reliability of the estimates. Saturation of the synchronous generator inductances is also considered. Secondary objectives include calculation of the error characteristics of the estimation, development of an index of confidence, study of the observability of generator parameters, and evaluation of alternative GUI features.

Application of Dynamic State and Parameter Estimation Techniques on Real-World Data

“…For example, in [13], the derivatives of frequency are computed through finite difference. In generator parameter estimation [4], [6], the derivatives of currents are computed using finite difference.…”

“…We will apply the algorithm to the PMU data from P 0 . The inputs of the estimation algorithm are The first step of the finite difference method is to estimate the transient reactance by curve fitting (6). We find that x In order to obtain the equivalent inertia, the derivative of P e and the 3rd derivative of δ should be obtained.…”

“…Dynamic state and parameter estimation has been applied in synchronous generator parameter and state estimation using digital fault recording (DFR) data [3]- [6]. The machine parameters to be estimated include the resistance and inductances of the armature winding, field resistance, magnetizing inductances and the effect of saturation.…”

State Estimation in Power Engineering Using the Huber Robust Regression Technique

“…The generator is located in the southwest USA and is rated 213.7 MVA and 18 kV. The linearized generator model derived in [4] is used in this example. The least-squares method has provided satisfactory estimates of the mutual inductances LAD and LAQ and the field resistance rF .…”

Investigation of transient phenomena of a salient pole synchronous machine during field short-circuit using FEM

“…VALUES OF THE DAMPER CURRENT OF THE BARS OF ONE POLE AT HEALTHY STEADY-STATE [1] ANDFAULT STEADY-STATE OPERATION[2] …”