Design And Implementation Of Protection And Supervisory For66kV Smart Substation

With the rapid growth of national economy, all sorts of electric equipment is becoming more andmore diversified, especially the non-linear power electronic devices. They generate reactive powerand pollute the power grid seriously. The power quality is influenced badly. They cause the powerfactor decreased, busbar voltage fluctuant and flicker, and make a large number of harmonic imputingthe power grid. The static var compensation device (SVC) can be used for compensating systemreactive power, solving the mentioned problems above effectively. This paper establishes FC+TCRtype of SVC mathematical model, calculates the relevant parameters based on static reactive powertheory and dynamic reactive power theory and examines the mathematical modal by using thesimulation software. The paper is narrated as the following order:First of all, the traditional reactive power compensator such as synchronous generator, synchronouscondenser, parallel capacitor and static var compensator (SVC) and static var generator (SVG) areintroduced, their advantages and disadvantages are analyzed. The paper studies the steady statereactive power theory, the dynamic reactive power compensation theory and the methods of reactivecompensation.Secondly, the working principle and the operation mode of the TCR type, TSC type and TSC+TCR type static var compensator are analyzed. The paper which is doing research on FC+TCR typestatic var compensator studies the algorithm method for TCR parameters, thyristor calculationparameters and passive filter. Using the10kV frequency converter experiment station as background,the paper calculates the detail parameters and designs a FC+TCR type static var compensator.Finally, using the MATLAB/SIMULINK software as simulation platform, the paper designs themodel for the simulation analysis. It checks the design by working at two working conditionsrespectively such as the balance load condition and the unbalanced load condition. Through theanalysis of the results, we can verify the correctness and feasibility for the simulation model.