Diagnosis of the Static Excitation Systems of Synchronous Generators with the Use of Hardware-In-the-Loop Technologies

Abstract

In this paper, testing and diagnosis methods for the static excitation systems of power plant synchronous generators using Hardware-In-the-Loop technology are described. These methods allow a physical excitation system to be connected to a real-time model of a power plant unit. A feature of a static excitation system is the presence of generator self-excitation—that is, when the input voltages of the excitation system are defined by a synchronous generator. These voltages are determining by the digital model, which creates additional difficulties with combining a digital model with a real excitation system. Various ways to solve this problem are described in this article; in particular, we focus on the option in which the gate-impulses of a thyristor converter are applied to the digital model by a real static excitation system. The real-time models are based on the method of average voltages in the integration step. This method is effective for providing numerical stability for the models of power schemes and their functioning in real time mode over a long period. A synchronization method for the calculation time of the model with real time is described. The adequacy of the described method is proved by the results of the static excitation system of synchronous generators testing in operating and fault modes.

An Influence of Spatial Harmonics on an Electromagnetic Torque of a Symmetrical Six-Phase Induction Machine

“…Examples of such models for electrical drives with a three-phase IM are presented in [34,35], and power systems with wind turbines are discussed in [36]. Reference [37] presents mathematical models of electrotechnical systems with synchronous machines and technology for use in testing synchronous generator excitation systems. The AVIS method is used for creating models of power systems with nonlinear elements [38].…”

Electromagnetic and Electromechanical Compatibility Improvement of a Multi-Winding Switch Control-Based Induction Motor—Theoretical Description and Mathematical Modeling

“…A feature of the proposed mathematical model of the switch control-based multi-winding IM is using the method of the average voltages in the integration step (AVIS) [25][26][27]. This method has repeatedly been used by authors, and its high efficiency was demonstrated during a simulation of power schemes with synchronous machines and induction machines, as well as power systems with nonlinearities [26,[28][29][30]. The advantages of the method are high calculation speed and numerical stability, which make it suitable for creating real-time models.…”

“…The advantages of the method are high calculation speed and numerical stability, which make it suitable for creating real-time models. These real-time models are able to work for a long time in interaction with physical objects (hardware-in-the-loop technology) [29,31,32].…”

A Mathematical Model of Electrical Arc Furnaces for Analysis of Electrical Mode Parameters and Synthesis of Controlling Influences

“…This approach has proven itself in the synthesis of real-time models of various electromechanical systems [24][25][26] and has been used to set up excitation systems for synchronous generators [27,28], including at the South Ukrainian NPP. The application of this approach in the EAF model will require the creation of a slightly different from the existing model of the arc space.…”