Time‐domain graphic interface for teaching transient stability

2021 ◽  
Author(s):  
Luis F. Jesus Fernandes ◽  
Edson A. Costa Júnior
Keyword(s):  
Time Domain ◽  
Transient Stability ◽  
Graphic Interface

scholarly journals MOSAIK and FMI-Based Co-Simulation Applied to Transient Stability Analysis of Grid-Forming Converter Modulated Wind Power Plants

2021 ◽  
Vol 11 (5) ◽  
pp. 2410
Author(s):  
Nakisa Farrokhseresht ◽  
Arjen A. van der Meer ◽  
José Rueda Torres ◽  
Mart A. M. M. van der Meijden
Keyword(s):  
Power System ◽  
Time Domain ◽  
Power Plants ◽  
Transient Stability ◽  
Renewable Energy Sources ◽  
Critical Factor ◽  
Primary Control ◽  
Simulation Approach ◽  
Wide Range ◽  
Grid Side

The grid integration of renewable energy sources interfaced through power electronic converters is undergoing a significant acceleration to meet environmental and political targets. The rapid deployment of converters brings new challenges in ensuring robustness, transient stability, among others. In order to enhance transient stability, transmission system operators established network grid code requirements for converter-based generators to support the primary control task during faults. A critical factor in terms of implementing grid codes is the control strategy of the grid-side converters. Grid-forming converters are a promising solution which could perform properly in a weak-grid condition as well as in an islanded operation. In order to ensure grid code compliance, a wide range of transient stability studies is required. Time-domain simulations are common practice for that purpose. However, performing traditional monolithic time domain simulations (single solver, single domain) on a converter-dominated power system is a very complex and computationally intensive task. In this paper, a co-simulation approach using the mosaik framework is applied on a power system with grid-forming converters. A validation workflow is proposed to verify the co-simulation framework. The results of comprehensive simulation studies show a proof of concept for the applicability of this co-simulation approach to evaluate the transient stability of a dominant grid-forming converter-based power system.

scholarly journals Analisis Perubahan Reaktansi Saluran Terhadap Transient Stability Of Multimachine Dengan Metode Runge-Kutta Fehlberg

2016 ◽  
Vol 4 (2) ◽  
Author(s):  
Petrus Prasetyo ◽  
Dikpride Despa ◽  
Herri Gusmedi ◽  
Lukmanul Hakim
Keyword(s):  
Time Domain ◽  
Transient Stability ◽  
Time Domain Simulation ◽  
Clearing Time ◽  
Runge Kutta ◽  
Swing Equation

Abstrak Keandalan sistem tenaga listrik dalam menjaga dan mempertahankan kontinuitas distribusi tenaga listrik,berkaitan dengan kestabilannya dalam menjaga synchronism generator ketika terjadi gangguan. Studi stabilitas transien berhubungan dengan gangguan-gangguan besar seperti surja hubung, hubung singkat, lepasnya beban atau lepasnya generator. Ada berbagai metode yang digunakan dalam analisis kestabilan diantaranya adalah metode Runge-Kutta Fehlberg yang merupakan salah satu metode Time Domain Simulation yang digunakan pada penelitian ini karena mampu meningkatkan akurasi dalam penyelesaian persamaan ayunan (swing- equation) sistem multimesin IEEE 9 bus. Tujuan penelitian ini adalah mempelajari dan menganalisis pengaruh perubahan reaktansi saluran terhadap  transient stability dengan menerapkan gangguan lepasnya beban dan gangguan 3 fasa simetris yang terjadi pada salah satu saluran. Hasil simulasi menunjukkan pemberian kompensasi dan penambahan jumlah saluran transmisi mampu meningkatkan stabilitas sistem tenaga listrik dengan menurunkan reaktansi saluran. Selanjutnya, diperoleh Critical Clearing Time (CCT) sebesar 0.19-0.20s. Dengan kompensasi 30%, 50% dan 70% diperoleh CCT berturut-turut 0.20-0.21s, 0.21-0.22s dan 0.22-0.23s. Ketika penambahan jumlah saluran, diperoleh CCT sebesar 0.21-0.22s. Sedangkan lokasi gangguan  hilangnya beban memberikan ayunan sudut rotor generator terdekat menjadi lebih besar dibandingkan dengan generator yang berada jauh dari lokasi terjadinya lepas beban. Kata kunci : Transient Stability, Runge-Kutta Fehlberg, Time Domain Simulation, Critical Clearing Time, sistem IEEE 9 bus.

Risk of Transient Stability Using Rotor Trajectory Index as Severity Function

2017 ◽  
Vol 6 (3) ◽  
pp. 591
Author(s):  
Elmotaz Billa Elghali ◽  
Marayati Marsadek ◽  
Agileswari K. Ramasamy
Keyword(s):  
Power Systems ◽  
Time Domain ◽  
Transient Stability ◽  
Quantitative Measure ◽  
Time Domain Simulation ◽  
New Approach ◽  
Three Phase ◽  
Degree Of Stability ◽  
Transient Instability ◽  
Risk Formula

This paper presents a new approach to determine the risk of transient stability. It describes the implementation of rotor trajectory index (RTI) to assess the severity of power systems when it is subjected to a three-phase fault. The (RTI) is proposed as an index used to represent severity of transient instability. Risk of transient stability for three-phase fault is calculated using a well-known risk formula. Risk of transient stability provides a quantitative measure to evaluate the potential loss of synchronism of a generator that takes into account the probability and consequences. RTI index is calculated based on the machines rotor angles obtained at each step of a time domain simulation. RTI is proposed as an index to show the severity of the three-phase fault towards transient stability since it allows a fast and accurate measurement of the degree of stability of the system facing a fault. The proposed technique is implemented on the IEEE 39-bus system.

Transient stability index from conventional time domain simulation

1994 ◽  
Vol 9 (3) ◽  
pp. 1524-1530 ◽  
Author(s):  
C.K. Tang ◽  
C.E. Graham ◽  
M. El-Kady ◽  
R.T.H. Alden
Keyword(s):  
Time Domain ◽  
Transient Stability ◽  
Stability Index ◽  
Time Domain Simulation

Transient Stability Analysis of Power System Based on Time Domain Simulation

2012 ◽  
Vol 263-266 ◽  
pp. 781-785 ◽  
Author(s):  
Liang Pi ◽  
Chen Wang ◽  
Wei Zheng
Keyword(s):  
Power System ◽  
Single Machine ◽  
Time Domain ◽  
Transient Stability ◽  
Simulation Models ◽  
Time Domain Simulation ◽  
Power System Stabilizers ◽  
Machine System ◽  
Single Machine Infinite Bus ◽  
Bus System

Single-machine infinite-bus system and two-machine system simulation models were built to study the power system transient stability. Based on time domain simulation, the effect of generator inertia time constant (τg), and excitation system ceiling voltage (Ke) on transient stability were analyzed by single-machine infinite-bus system. The changes of transient stability of two-machine system were also compared by means of power system stabilizers (PSS) and static VAR compensator (SVC). In particular, the system transient stability varied greatly in different locations of SVC. Finally, some suggestions concerning the improvement of power system transient stability were put forward.

Simulation of simultaneous unbalances in power system transient stability analysis

SIMULATION ◽  
2010 ◽  
Vol 87 (11) ◽  
pp. 976-988 ◽  
Author(s):  
Amangaldi Koochaki ◽  
Shahram Montaser Kouhsari
Keyword(s):  
Stability Analysis ◽  
Power System ◽  
Time Domain ◽  
Transient Stability ◽  
Large Change ◽  
Accurate Method ◽  
Test System ◽  
Decomposition Algorithm ◽  
Network Decomposition ◽  
Novel Method

In this paper a novel method based on network decomposition algorithm is presented to implement simultaneous unbalances in power system transient stability (T/S) studies. The proposed network decomposition algorithm employs bus-tearing and Diakoptics concepts. In combination with Large Change Sensitivity (LCS) analysis, which allows the procedure to evaluate system responses without resolving the whole problem, an accurate method is developed to solve the simultaneous unbalances in T/S analysis. The proposed method is implemented successfully in software and the results are validated in comparison with time domain simulations. The performance of our proposed method is investigated in this paper for a 14-bus IEEE test system. The results reveal the credibility of the method.

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