Tuning of ARV-2MA automatic field controller for T3FAU-160 and T3FSU-320 turbogenrators at computer test facility of Electric Power Research Institute

Abstract

Unlike T3FA 110 asynchronized turbogenerators (ASTGs) with symmetric field windings, T3FAU 160 and T3SU 320 turbogenerators are implemented with nonsymmetrical field windings (with control field windings). The control algorithms of these generators were corrected and checked by mathematical models. The real sample of the ARV 2MA field controller intended for T3FAU 160 and T3FSU 320 turbogen erators was tuned and verified at the computer test facility of the Electric Power Research Institute (EPRI). Figure 1 depicts a block diagram of a computer test facility intended for the real time study of the operating modes of a T3FAU 160 turbogenerator incombination with a full scale sample of the automatic ARV 2MA field controller. The computer test facility consists of the following:⎯A PC model (PCM), which is a personal com puter where the model of the asynchronized turbogen erator with its basic system, and the model of the power system are implemented in real time.⎯A CB is a control board that simulates the master control board of the station (MCB).⎯A concentrator is a unit that connects all units of the computer test facility with a full scale ARV 2MA sample.⎯A service PC (PCS) is a service personal com puter that does the following:⎯makes it possible to visually control and record the operational process of a turbogenerator in a power system and of a full scale sample of the control system using a 32 channel digital oscillograph;⎯contains a source file of the model that describes the computer test facility and allows one to correct software on the fly as necessary. The service computer is connected with the PCM via RS 232 ports, which permits one to load the executable file into the PCM, as well as to vary the parameters of the simulating sys tem, which operates on a real time basis (mode of tur bogenerator operation, emergency situation in the power network, in the field system, etc.) using service software;⎯enables one to compare the operation of the full scale sample of the control system with the built in model of the computer analog of a full scale sample.Three special input-output boards of PC1 DDA08/12 are placed in the slots of the PCM. These boards are connected with the concentrator by input cables.ARV, SIFU FCq, and SIFU FCd units in the full scale sample of an automatic ARV 2MA field control ler are connected by cables with the corresponding slots of the concentrator board. This structure makes it possible to change the circuit of connections and sig nal addresses input to the ARV 2MA and recording oscillograph on the fly as necessary. Figure 2 depicts a general view of the computer test facility with an ARV 2MA field controller.The software simulated in real time show how an ASTG with a field system operates in the power sys tem. The models for turbogenerators are generated in accordance with complete Park-Gorev equations without taking into consideration the saturation and transient processes that take place in stator circuit. The rotor is represented by three equivalent damping circuits. Two field win...