NDLI: Simulation and experimental illustration of vibration at load rejection in a continuously overloaded large hydrogenerator

Content Provider	IET Digital Library
Author	Carounagarane, Carunaiselvane Chelliah, Thanga Raj Sarma, Suri Venkata Appa
Abstract	Large hydro generators are usually overloaded at various situations such as the period when excess water is available and when excess inflow is to be discharged. The period may have extended to many weeks under exigent conditions e.g. six weeks in case of a 1000 MW hydropower plant (HPP) located at northern region, India at 20% overload. All the performance related parameters including vibrations were observed during commissioning except runaway speed test at load rejection. At overloads, if there is a sudden load rejection the vibration transients will be even more severe due to drop in current and internal impedance. Hence this paper aims to analyze the vibration signature of large synchronous generator (SG) when operated at overloads and subjected to sudden load rejection. The substantiation of the factual model of 250 MW hydro generating units (HGU) replicating the case plant has been simulated using SIMSEN software. Apart from case report and simulative validation an experimental verification is also conducted with a prototype model of 2.2 kW SG. This paper provides the feasibility to operate the SG's 20% beyond its rated load as designed with proper maintenance and safety carried out by plant operators.
Starting Page	1550
Ending Page	1558
Page Count	9
ISSN	17521416
Volume Number	14
e-ISSN	17521424
Issue Number	Issue 9, Jul (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rpg/14/9
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2019.0847
Journal	IET Renewable Power Generation
Publisher Date	2020-03-18
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Continuously Overloaded Large Hydrogenerator Excess Water Experimental Verification Hydro Generating Units Hydro Generator Hydroelectric Generator Hydroelectric Power Stations And Plant Hydropower Plant Internal Impedance Performance-related Parameter Permissible Silt Content Plant Operators Power 1000.0 MW Power 2.2 KW Power 250.0 MW Rated Load Reservoir Level Reservoirs Runaway Speed Test Simulative Validation Sudden Load Rejection Synchronous Generator Synchronous Machine Vibration Signature Vibration Transients Vibrations
Content Type	Text
Resource Type	Article
Subject	Renewable Energy, Sustainability and the Environment

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Electrical braking of synchronous generators for combined generator and water turbine bearings as well as stray-load losses determination

Improved high-speed de-excitation system for brushless synchronous machines tested on a 20 MVA hydro-generator

Fault diagnosis of rotor winding inter-turn short circuit for sensorless synchronous generator through screw

Detailed modelling and parameters optimisation analysis on governing system of hydro-turbine generator unit

Numerical calculation of circulating current losses in stator transposition bar of large hydro-generator

Electromagnetic Vibration Simulation of a 250-MW Large Hydropower Generator with Rotor Eccentricity and Rotor Deformation

Dynamic analysis and modelling of a Francis hydro-energy generation system in the load rejection transient

Internal sudden short-circuit response of a new HSBDS for brushless synchronous machines tested on a 15 MVA generator

Flow motion power [hydroelectricity]

Simulation and experimental illustration of vibration at load rejection in a continuously overloaded large hydrogenerator

Similar Documents

Electrical braking of synchronous generators for combined generator and water turbine bearings as well as stray-load losses determination

Improved high-speed de-excitation system for brushless synchronous machines tested on a 20 MVA hydro-generator

Fault diagnosis of rotor winding inter-turn short circuit for sensorless synchronous generator through screw

Detailed modelling and parameters optimisation analysis on governing system of hydro-turbine generator unit

Numerical calculation of circulating current losses in stator transposition bar of large hydro-generator

Electromagnetic Vibration Simulation of a 250-MW Large Hydropower Generator with Rotor Eccentricity and Rotor Deformation

Dynamic analysis and modelling of a Francis hydro-energy generation system in the load rejection transient

Internal sudden short-circuit response of a new HSBDS for brushless synchronous machines tested on a 15 MVA generator

Flow motion power [hydroelectricity]

Simulation and experimental illustration of vibration at load rejection in a continuously overloaded large hydrogenerator