scholarly journals SFRA Test Method Application for Turbo Generator Rotor Winding

2021 ◽  
Vol 1887 (1) ◽  
pp. 012048
Author(s):  
Zakky Mubarak ◽  
Eko Supriyanto
Keyword(s):  
Test Method ◽  
Generator Rotor ◽  
Turbo Generator ◽  
Rotor Winding

scholarly journals Analysis and location of Turn-To-Turn short circuit of rotor windings in generator

2021 ◽  
Vol 233 ◽  
pp. 04018
Author(s):  
Yucheng Zhang ◽  
Zenghuan Sun
Keyword(s):  
Power Loss ◽  
Short Circuit ◽  
Ac Impedance ◽  
Test Method ◽  
Running Time ◽  
Generator Rotor ◽  
Rotor Winding

With the increase of generator running time, the probability of generator rotor problems increases constantly. In this paper, a generator is taken as an example. During maintenance, the generator is found to have the evidence of turn-to-turn short circuit of rotor windings by the repetitive surge oscilloscope method, which is verified by the AC impedance power loss test of the rotor winding. The position of turn-to-turn short circuit is determined by the inter-pole voltage method and the coil voltage method. The accuracy of the test method is further verified by the generator rotor’s return repair.

Experimental Study of Water Flow in Full-Size Test Rig for Water-Cooled Turbo-Generator Rotor

1966 ◽  
Vol 181 (1) ◽  
pp. 53-73 ◽  
Author(s):  
I. K. Csillag
Keyword(s):  
Operating Conditions ◽  
Experimental Investigations ◽  
Air Cooling ◽  
Test Rig ◽  
Full Size ◽  
Generator Rotor ◽  
Turbo Generator ◽  
Hydrogen Cooling ◽  
Major Factors ◽  
Design And Manufacture

The demand for electric power has doubled in the last decade. The most economical way to meet this demand is by building large-output generating units. The study of the major factors which determine the output of such generators shows that the only effective way to increase the output is by improving the cooling of their windings. For that reason design has progressed from air-cooling to indirect hydrogen-cooling, then to direct hydrogen-cooling. Now the trend is towards direct water-cooling where the water is in direct contact with the copper windings. The introduction of water into the stator winding was established in 1956 (1)† and was in fact directly responsible for the present increase in unit rating. The introduction of water to a rotating winding presents difficult problems in both design and manufacture. The test rig dealt with in this paper was built to study some of these problems and to carry out experimental investigations on a full size model of the special hydraulic features for a water-cooled turbo-generator rotor. The investigations were concentrated around the following five different problems which are dealt with in detail: (1) increase in pressure drop due to rotation; (2) free-rotating seal (inlet seal) (2); (3) vacuum-breaking device (water outlet) (3); (4) loss-distribution in the rotor; (5) measurement of the rotor vibrations in various operating conditions.

A Pareto-Based Genetic Algorithm Search Approach to Handle Damped Natural Frequency Constraints in Turbo Generator Rotor System Design

2004 ◽  
Vol 126 (3) ◽  
pp. 619-625 ◽  
Author(s):  
Anders Angantyr ◽  
Jan Olov Aidanpa¨a¨
Keyword(s):  
Genetic Algorithm ◽  
Natural Frequencies ◽  
Design Criterion ◽  
Rotor System ◽  
Design Tool ◽  
Generator Rotor ◽  
System A ◽  
Turbo Generator ◽  
Design Variables ◽  
Search Approach

The detailed design of a turbo generator rotor system is highly constrained by feasible regions for the damped natural frequencies of the system. A major problem for the designer is to find a solution that fulfills the design criterion for the damped natural frequencies. The bearings and some geometrical variables of the rotor are used as the primary design variables in order to achieve a feasible design. This paper presents an alternative approach to search for feasible designs. The design problem is formulated as an optimization problem and a genetic algorithm (GA) is used to search for feasible designs. Then, the problem is extended to include another objective (i.e., multiobjective optimization) to show the potential of using the optimization formulation and a Pareto-based GA in this rotordynamic application. The results show that the presented approach is promising as an engineering design tool.

Experience With Emergency Response Planning and Rotor Flux Monitoring to Improve Generator Reliability

2005 ◽  
Author(s):  
Richard Williams ◽  
Paul Michael
Keyword(s):  
Emergency Response ◽  
Best Practice ◽  
Key Factors ◽  
Response Planning ◽  
Turbo Generator ◽  
Emergency Response Planning ◽  
Rotor Flux ◽  
Flux Monitoring ◽  
Rotor Winding

In today’s commercial environment, unplanned outages have a significant affect on revenues, and hence reliability, availability and maintainability of plant are key factors. Emergency Response Planning, combined with real time monitoring can have significant beneficial impacts on unplanned and planned outage duration’s. This paper details our company’s experience of Emergency Response Planning (ERP), giving detailed overview of how this is achieved and the benefits that can be obtained. The paper focuses on unit disaster recovery of large turbo-alternators and how the concept of Emergency Response planning can reduce unplanned outage duration’s, including the steps required to implement best practice. The paper uses a detailed a case study of a 1200MW, 4-pole generator with severe rotor winding inter-turn faults and associated vibration problems to demonstrate how a combination of condition monitoring, Emergency Response Planning, and a skilled repair team have been used to implement an effective maintenance strategy. The benefits to the customer have been detailed. The successful repair of all faults and the significant reduction in generator vibration levels without the requirement for any site balancing is illustrated on return of the unit to service. The paper details how Rotor Flux Monitoring (RFM) has been identified a series of winding faults and with ERP has mitigated areas of high risk within this turbo-generator.

Thermographical analysis of turbo-generator rotor

2018 ◽  
Vol 163 ◽  
pp. 252-260 ◽  
Author(s):  
A.N. Singh ◽  
W. Doorsamy ◽  
W. Cronje
Keyword(s):  
Generator Rotor ◽  
Turbo Generator
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