Synchronous Generator Excitation Device Online Test Research Of Digital Simulation System

The stability of terminal voltage is depended on an excellent excitation control apparatus. Distributing reactive power reasonability and improving static and dynamic stability of the power system are the important guarantee for reliable operation of power system. So it is necessary to test the performance of excitation control apparatus to guarantee its excellence. But the final parameters tuning and dynamic experiments of synchronous generator excitation control apparatus is usually complicated in real unit. This method has heavy impulse to system and sometimes even dangerous.To solve this problem, In this paper, with the Visual C ++ development platform and based on one machine infinite bus system, a simulation software package for excitation regulator test system is developed including the synchronous generator and other network elements that exist in real system. By this method a generator- excitation regulator closed control loop is formed and an exciter online half-real simulation test system is established. The Real-time state variable generators from testing software Packages are sent to excitation regulator to constitute the generator- excitation regulator close loop control circuit. And the semi-physical simulation system for real-time online excitation device is established which could complete the excitation device empty and load characteristic test easily and ensure the regulation performance of the excitation device. This technical program is safety, economical, convenient and reliable, and has broad application prospects.In this paper, the work is to select a simplified model of the power system and take the machine infinite system as the target to create. The mathematical model consists of synchronous generator, excitation system, network elements and load. Runge- Kutta method is used to transform mathematical model into programmable computer simulation model and simulation program is write on Visual C++6.0 software platform. The communications software package of human–machine interaction and excitation device is write by MFC and realized data real-time online test and display between the simulation software and excitation device. At last, the necessary simulation and verification analysis is completed on excitation device. The result proved that the software package is effective for excitation device and has applied significance for improving the quality of excitation regulator.