Estimation of Synchronous Generator Parameters using Time-domain Responses

[摘要] Power system stability simulations are of growing importance for studying the operationalintegrity of modern power systems, especially in developing economies where generating andtransmission capacity lead the demand by relatively small margins. The relevant modeltopologies, i.e. for synchronous generators, automatic voltage regulators (AVR) and governorcontrol systems, and the simulation software tools are well established.The MATLAB® Power System Blockset provides engineers with a versatile power systemstability simulation environment, particularly where the focus is on individual units or smallsystems. In comparison with dedicated power system simulation tools such as DIgSILENT®,the MATLAB® environment features a superior set of advanced data processing and dataanalysis features. This includes features such as optimisation and parameter estimationfunctions.The main aim of this project is to make use of the MATLAB® package in a bid to test analternative platform with which to estimate the synchronous machine parameters.Conditioning of field data can delay the process considerably, thus the secondary task of thisthesis is to solve this issue by ensuring that only one platform is needed for the entire processstarting in the field and ending in the modelling and parameter estimation environment withinMATLAB®.In closing, the following points summarise the essential aims of this project:• An application using MATLAB® Script must be created that is responsible forimporting and processing the data, so it is suitable for analysis purposes. Theprocessing could include cropping, scaling and filtering of data.• Once the data has been imported it must be used with appropriate models to estimatefor machine parameters. This will require the use of the Power Systems Blockset.The actual estimation process also requires the creation of an effective cost function,thus a number of different scenarios will have to be investigated before a solution canbe found.

[发布机构] Stellenbosch University