Author: energiforsk.se

Date Submitted: 09/11/2019 05:43 AM

Average star voting: 4 ⭐ ( 52716 reviews)

Summary:

Match with the search results: Subsynchronous resonance is a phenomenon in which one or more of the resonant frequencies of the turbine generator shaft in thermal power units coincides through the generator with a natural resonant frequency of the electrical system with long radial transmission network with series capacitors such that there is a ……. read more

Author: www.hindawi.com

Date Submitted: 08/21/2020 01:14 PM

Average star voting: 5 ⭐ ( 33801 reviews)

Summary: The subsynchronous resonance (SSR) is an important problem in the power system, and especially the series compensated transmission lines may cause SSR in the turbine generators, such that it leads to the electrical instability at subsynchronous frequencies and potential turbine-generator shaft failures. Taking the Vietnamese Vungang thermal plants as an example, a shaft failure of Vungang I thermal power unit has occurred on November 24, 2015, due to SSR. The main cause for this failure is a resonance caused by the series capacitors on the 500 kV grid. This paper analyzes the SSR based on the location of shaft cracks and turbine generator mode shape for Vungang I and II thermal power plants. On the basis of that, it develops a novel control strategy for each Flexible AC Transmission system (FACTS) device as the thyristor controlled series compensator (TCSC), static VAR compensator (SVC), and static synchronous compensator (STATCOM). Then they are comparable to one another in order to choose a feasible solution for mitigating the SSR. The effectiveness of the proposed control strategy is verified via time domain simulation of the Vietnamese 500/220 kV transmission system using EMTP-RV and PSS/E programs. The obtained results show that the proposed strategy for SVC can be applied to immediately solve the difficulties encountering in the Vietnamese power system.

Match with the search results: Subsynchronous resonance in power systems (Book by P. M Anderson)…. read more

Author: www.accessscience.com

Date Submitted: 07/08/2020 06:24 PM

Average star voting: 3 ⭐ ( 47815 reviews)

Summary: The resonance between a series-capacitor-compensated electric system and the mechanical spring-mass …

Match with the search results: Analysis of SSR. SSR is a state in which the power system exchanges the energy with the generator turbine at one or more frequencies below the synchronous one ……. read more

Author: www.quora.com

Date Submitted: 11/05/2020 03:44 AM

Average star voting: 5 ⭐ ( 10853 reviews)

Summary:

Match with the search results: The resonance between a series-capacitor-compensated electric system and the mechanical spring-mass system of a turbine-generator at subsynchronous ……. read more

Author: ieeexplore.ieee.org

Date Submitted: 03/01/2019 09:36 AM

Average star voting: 3 ⭐ ( 33477 reviews)

Summary: Mathematical calculations for subsynchronous system modeling Subsynchronous Resonance in Power Systems provides in-depth guidance toward the parameters, modeling, and analysis of this complex subclass of power systems. Emphasizing field testing to determine the data required, this book facilitates thorough and efficient oscillation and damping modeling using eigenvalues of a systems linear model. Expert discussion provides step-by-step instruction for generator, network, and turbine-generator shaft models, followed by detailed tutorials for model testing and analysis based on IEEE, CORPALS, and SSR eigenvalue analysis. Comprehensive in scope and practical in focus, this book is an invaluable resource for anyone working with frequencies below 60 Hz.

Match with the search results: Whenever the load on an alternator is increased, the rotor speed slightly decreases, this speed is called as subsynchronous speed….. read more

Author: ieeexplore.ieee.org

Date Submitted: 01/26/2021 02:14 PM

Average star voting: 4 ⭐ ( 67337 reviews)

Summary:

Match with the search results: Abstract: Synchronous Resonance (SSR) is a phenomenon in which electrical energy is exchanged between generators and transmission systems below power ……. read more