This paper is devoted to the description of a new approach for large-scale electric power systems (EPS) simulation, so-called hybrid simulation approach. The design and research EPS require solving large number non-trivial tasks. Due well-known specificity, mathematical modeling only way proceed. According approach, several techniques (analogue, digital, physical) are used achieve best results. An analogue part provides elimination methodological integration error, which appears in case...

Frequency control is one of the most important tasks in electric power systems. At same time, modern systems with inertia-free converter-interfaced generation, this task has become more complex. Such an issue especially relevant for microgrids, which are characterized by a significant increase rate change frequency and its nadir or zenith. An effective way through use energy storage (ESSs) grid-forming microgrids. For purpose, paper proposes novel structure algorithm based on current-control...

In modern converter-dominated power systems, total inertia is very variable and depends on the share of generated by renewable-based converter-interfaced generation (CIG) at each specific moment. As a result, limits required grid codes rate change frequency its nadir or zenith during disturbances become challenging to achieve with conventional control approaches. Therefore, transition novel strategy CIG grid-forming converter relevant. For this purpose, algorithm based virtual synchronous...

The motivation for the presented research is based on needs to develop new methods and tools obtaining information required evaluate mutual influence of HVDC HVAC systems. This paper presents specialized concept a hybrid simulation advanced modeling VSC HVDC. results obtained by prototype processor model confirm effectiveness proposed approach with respect detailed representation commutation process real power semiconductors possibility real-time all processes in EPS as whole without any...

The transience and unpredictability of processes in electric power systems (EPS) determine complexity its control. This problem is especially relevant for EPS with renewable energy sources flexible alternating current transmission technologies. Automatic control simplify the solution this problem. Despite this, many issues related to state are solved by system operators. Decision support (DSS) applying increase efficiency operators work. However, existing algorithms practice inoperable some...

In this article the research results of application back-to-back HVDC system in Tomsk electric power are presented. Historically, transmission between South to North parts is realized via long double-circuit 220 kV overhead line. However, due electrical load increasing and growing complexity grid, as well length (about 800 km) low transfer capacity transit, it cannot be used a reliable link for parallel operation these parts, consequence, there an operational section at transit. To solve...

Reliability and survivability of electric power systems (EPS) depend on transient stability assessment (TSA). One the most effective way to TSA is time-domain simulation. However, large-scale EPS mathematical model contains a stiff nonlinear system high-order differential equations. Such cannot be solved analytically. At same time, numerical methods are imperfectly applied for such due limitation conditions. To make it appropriate, simplified additional limitations used. These...

The stability of electric power system (EPS) insures energy security consumers. Therefore, saving the EPS is main task for professionals around world. For its solution, a variety activities used. This publication deals with description authors' experience solving in Tyumen system. hybrid real‐time simulator (HRTSim) developed Tomsk Polytechnic University was used as platform research carrying out. study presents result fragments momentary and sustained fast turbine valving control (FTVC)...

Abstract Currently, the number of distributed generation (DG) objects in world is growing mainly due to renewable energy sources (RES). However, integration a large volume DG based on RES into existing electric power systems (EPS) associated with significant problems. For comprehensive study and solution these problems, it necessary carry out detailed simulation real EPS, which not always feasible help tools. Therefore, article proposes use an alternative – Hybrid Real-Time Power System...

Abstract The article presents the Hybrid Real-Time Dispatcher Training Simulator (HRTDTS). main advantages of this simulator are adequate simulation a single spectrum processes in object for training – any real electric power system (EPS), as well real-time control equipment circuit-mode states modes EPS operation. This is achieved by HRTDTS development within concept hybrid simulation, which allows to surpass modern widely-used simulators based purely on numerical do not comprehensively...

Currently, an issue of relay protection (RP) settings determination that ensures its correct operation in electric power systems (EPSs) has not been resolved completely. The main reason for this is the lack methods and tools adequate consideration transients during a fault existence RP calculation. In study, novel approach presented. Its feature application detailed mathematical models reproducing simultaneously processes entire set elements scheme, including instrumental transformers,...

The share of the wind turbines (WT) and power generation in general is steadily increasing electric systems (EPS). To solve different issues associated with designing operating WTs EPS, reliable information about all possible modes processes EPS needed. Software hardware-software simulation tools inevitably use numerical integration methods to calculate EPSs, which have its well-known limitations simplifications, so reliability results obtained via such some cases can be insufficient. aim...

This article contains a review of grid codes throughout the world. Although addresses many issues, only four aspects related to generator-grid interaction are most important: ranges frequency variation, voltage fault ride through capability, reactive power capability.

The problem of relay protection misoperations in networks with FACTS devices is considered the paper. It offered a solution to this for phase comparison transmission power line through use its detailed model analysis functioning case various normal, emergency and post-emergency modes electric systems. research results approach are given

Due to increasing complexity of power systems the task ensuring adequate operation relay protection becomes more urgent. Detailed mathematical models together with modern system simulators are proposed be used as a solution this problem. At same time, simulation instrumental transformers, in particular magnetization process core, is very important because waveform signals controlled by largely determined transducers' errors. The developed model current transformer reproducing magnetic...

The methodology of development adequate high-frequency phase comparison line protection modeling tools is given in the article. These are proposed to be used for settings optimization with using arrays instantaneous values particular primary regime information that can obtained by emergency events recorders or appropriate electric power systems (EPS) simulators. Research results confirm mentioned features and capabilities developed RPA tools.

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

The objective of this work is to determine the influence high-frequency link (HFL) on functioning phase comparison protection (PCP) through usage detailed models that take into account specific features PCP and processes in HFL. article describes case most common variant high frequency signal transmission by using a scheme ‘phase-to-ground’. To verify suggested solution developed mathematical model HFL has been studied. Presented simulation results confirm effectiveness proposed approach for...

This article summarizes results of the development algorithm dispatching personnel's possible actions in various regime situations electric power systems by using information and telecommunications decision support system for personnel (ITDSS DP EPS). The functions EPS operational control normal, emergency post-emergency cases were considered. presents ITDSS software development. Examples use developed are given article.

The analysis results of the existing problem reliability and validation widely used digital simulation tools electric power systems (EPS) are presented in paper. reasons connected with using numerical integration for stiff nonlinear differential equations high order, describing processes real systems. Fundamental unsolvability framework approach determines necessity obligatory each solution, but it is impossible because required measured data not available all regimes EPS. developed...