Alexandr S. Gusev

Real-time comprehensive simulation of electric power systems for the task of overvoltages value determination

For a correct determining of the overvoltage limiters characteristics, as well as the optimal location of its installation is required to use reliable information about the primary electrical quantities, especially voltage level, in different operation modes of electric power systems (EPS). This problem is highly complex, due to the danger of the experiments in real EPS. Methods and tools for calculation and researches of quasi-stationary and switching overvoltages which are applied to solve this problem not always allow to obtain satisfactory results. The developed tools of comprehensive real-time simulation of electric power systems, providing adequate reproduction of processes associated with overvoltages in EPS, are presented in the article. Fragments of the researches of switching overvoltage in the electrical network of the real power system are given.

Simulation of automatic exciting regulators of synchronous generators in hybrid real-time power system simulator

This paper presents the features of the implementation of automatic exciting regulators (AER) models in the Hybrid Real-Time Power System Simulator (HRTSim). This simulator has unique abilities: simulation without decomposition, no restrictions on the dimension of the simulated power system, realtime simulation, exclusion of methodological error of simulation, usage of full and adequate models of primary and auxiliary power system equipment. These features allow using HRTSim for a variety of tasks in the energy sector. The article presents fragments of AER research and setting in Tomsk power system with using of HRTSim.

Development of hybrid model of STATCOM

The results of analysis of main trends in simulation of Flexible Alternative Current Transmission Systems as well as the challenges of their adequate simulation are presented in this paper. The necessity of development of new methods and tools for retrieval of information required for evaluation of mutual influence between Flexible Alternative Current Transmission Systems and alternating current systems is shown. The concept of hybrid simulation for designing of Static Synchronous Compensator model as the most functional devices of Flexible Alternative Current Transmission Systems technologies and their simulation result are given in the paper. The obtained results prove the advantages of hybrid simulation approach for continuous three-phase real time simulation without decomposition of processes on an unlimited interval in the Static Synchronous Compensator model for implementation in large power system models.

Hybrid real-time simulator of power system for advanced simulation of the FACTS and HVDC system based on voltage source converter

The motivation of the presented research is based on the need to develop new methods and tools for obtaining information required to evaluate mutual influence between high voltage direct and alternating current systems. This paper presents a specialized concept of hybrid simulation for advanced simulation of the Flexible Alternating Current Transmission System (FACTS) and High Voltage Direct Current Transmission System (HVDC) based on Voltage Source Converter (VSC). The presented simulation results of the developed hybrid model of VSC confirm the achievement of the desired properties of the model and the effectiveness of the proposed solutions.

Advanced Simulation of the Power Electronic Converters of VSC FACTS and HVDC in Hybrid Real Time Simulators of Power System

The present paper focuses on simulation of VSC (voltage source converter) based on FACTS (Flexible Alternating Current Transmission System) and HVDC (High Voltage Direct Current) transmission technologies. Particular attention is paid to hybrid real-time simulation approach which provides adequate and comprehensive modeling of electric power systems (EPS), containing FACTS and HVDC. The results of experimental research support the necessary level of adequate simulation of commutation processes and suitability of the presented concept and simulation tools for effective solution of research and development tasks of effective use of HVDC and FACTS devices in EPS.

Testbed Based on Hybrid Real-Time Power System Simulator for Setting up and Testing of Protection and Control Systems

In this article we will focus on creating of testbed based on hybrid real-time power system simulator (HRTSim) for setting up and testing of relay protection (RP), automatic (AS) and control systems (CS), as well as the opportunities and prospects of its application. The simulator has physical outputs, which allows using it for close-loop testing of RP, AS and CS. Physical currents and voltages generated in the simulator during a simulation process can be transmitted to the analog inputs of tested device by means of external amplifiers. There are no restrictions on the dimension of the simulated power system and time interval for HRTSim. These opportunities and usage of adequate models of primary and auxiliary power system equipment allows reducing the number of possible equivalenting and creating as closely as possible to the real conditions for setting up and testing of any RP, AS and CS, including wide-area protection and control systems.

Detailed simulation of distance protection for its testing and setting

Abstract A significant part of severe accidents (blackouts) in electric power systems (EPS) is associated with incorrect operation of relay protection and automation (RPA). One of the main reasons for the incorrect actions of the RPA devices is its rough settings, which often does not correspond to the real operating conditions for specific device. An analysis of currently used methods and tools for RPA setting up, shown that they are largely relied on the guidelines of previous decennaries. Respectively modern techniques have the same drawbacks associated with accounting the processes in specific RPA and primary transducers and its errors by approximate coefficients. It is possible to solve the indicated problem with a highly detailed analysis of the operation of key elements of RPA schemes in the specific operating conditions. The obtained results allow to estimate the processes in protected objects, processing errors in instrumental current (ICT) and voltage (IVT) transformers, as well as in RPA itself. Such possibility could be achieved by the detailed RPA mathematical modeling. The combination of an adequate EPS simulator and RPA models allows configuring parameters of the RPA settings ensuring its correct operation in real EPS. The article presents result of this research for distance protection

Measure of reliability tools for simulating electric power systems and alternative approach of their verification

The results of study existing problem of validation electric power system simulators are contained in this paper. It is connected with using numerical solution of stiff nonlinear system of differential equations of high dimensionality, describing the processes in real electrical power systems for all possible normal, emergency and post-emergency conditions. Theoretical and practical results of impossible accuracy and reliable solutions of such system by using digital tools are given. Alternating approach called hybrid simulation for solution this problem is described. The created in the framework of this approach tool can be serve as a source of reference data and used for the validation of digital simulation tools.