Performance of Generator protection during major system disturbances

Patel, S.; Stephan, Khaled; Bajpai, M.; Das, Radhakrishna; Domin, Thomas; Fennell, E.; Gardell, J.; Gibbs, I.A.; Henville, C.F.; Kerrigan, P.; King, H. J.; Kumar, P.; Mozina, Charles J.; Reichard, Michael; Uchiyama, J.; Usman, Saeeda; Viers, D.; Wardlow, D.; Yalla, M.

doi:10.1109/tpwrd.2003.820613

Cited by 58 publications

(23 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…4 in the rotor angle case, and the ranges identified in the IEC 60034-3 standard [10] in the frequency case. When a generator exceeds limits, the interface dynamically creates a new list that provides the generator name, current rotor angle or frequency, the time at which the limit was exceeded, and the order in which the generators exceeded the specified limits.…”

Section: Tabular Data Visualization Of Violationsmentioning

confidence: 99%

See 1 more Smart Citation

Visualization of Dynamic Simulation Data for Power System Stability Assessment

Song¹,

Jang²,

Park

2011

Journal of Electrical Engineering and Technology

View full text Add to dashboard Cite

-Power system analyses, which involve the handling of massive data volumes, necessitate the use of effective visualization methods to facilitate analysis and assist the user in obtaining a clear understanding of the present state of the system. This paper introduces an interface that compensates for the limitations of the visualization modules of dynamic security assessment tools, such as PSS/e and TSAT, for power system variables including generator rotor angle and frequency. The compensation is made possible through the automatic provision of dynamic simulation data in visualized and tabular form for better data intuition, thereby considerably reducing the redundant manual operation and time required for data analysis. The interface also determines whether the generators are stable through a generator instability algorithm that scans simulation data and checks for an increase in swing or divergence. The proposed visualization methods are applied to the dynamic simulation results for contingencies in the Korean Electric Power Corporation system, and have been tested by power system researchers to verify the effectiveness of the data visualization interface.

show abstract

Section: Tabular Data Visualization Of Violationsmentioning

confidence: 99%

“…Fig. 7 illustrates the tabular information on the generators that exceeded the limits defined by the IEC 60034-3 [10] standard. Fig.…”

Section: Simulation Casesmentioning

confidence: 99%

Visualization of Dynamic Simulation Data for Power System Stability Assessment

Song¹,

Jang²,

Park

2011

Journal of Electrical Engineering and Technology

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

“…This may cause cascading trip events and accelerate power system failure. In addition, the complex setting principle of conventional backup protection may induce hidden failures caused by setting mistakes [2], which would increase the risk of system instability during a disturbance [3,4].Moreover, some of the researchers have proved the existence of a potential problem due to the current setting of Relay (21) when it is set according to the present standards and recent related publications for generator thermal backup protection against transmission line uncleared faults, it is found that the current setting of the Relay (21) for generator thermal backup protection restricts the over excitation thermal capability of the generator [5]. Such a restriction does not allow the generator to supply its maximum reactive power during such events.…”

mentioning

confidence: 99%

A Secure ANFIS based Relay for Turbo-Generators Phase Backup Protection

Aziz¹,

Elsamahy²,

Moustafa³

et al. 2016

IJEECS

View full text Add to dashboard Cite

This paper presents a new advanced methodology as a solution for the problem due to the current setting of Relay (21) when it is set to provide thermal backup protection for the generator during two common system disturbances, namely a system fault and a sudden application of a large system load. Keywords: adaptive neuro fuzzy inference system, distance protection, phase backup protection, turbogenerator, dynamic performance, simulationCopyright © 2016 Institute of Advanced Engineering and Science. All rights reserved. IntroductionProtective relaying provides important defense for power grid operation. Conventional backup protection depends on local electrical information to make relevant decisions, and cannot securely distinguish an internal fault from heavy load during flow transfer [1]. This may cause cascading trip events and accelerate power system failure. In addition, the complex setting principle of conventional backup protection may induce hidden failures caused by setting mistakes [2], which would increase the risk of system instability during a disturbance [3,4].Moreover, some of the researchers have proved the existence of a potential problem due to the current setting of Relay (21) when it is set according to the present standards and recent related publications for generator thermal backup protection against transmission line uncleared faults, it is found that the current setting of the Relay (21) for generator thermal backup protection restricts the over excitation thermal capability of the generator [5]. Such a restriction does not allow the generator to supply its maximum reactive power during such events. Thus, the necessity of revising the Relay (21) reach to ensure a secure performance for the relay during major system disturbances was initiated, which would allow the generator to fulfill the system requirements during such events to ensure adequate level of voltage stability.The Relay (21) element is typically set at the smallest of the following three criteria [6]: 1. 120% of the longest line with in-feeds. 2. 50% to 67% of the generator load impedance (Z load ) at the rated power factor angle (RPFA) of the generator. This provides a 150% to 200% margin over generator full load.3. 80% to 90% of the generator load impedance at the maximum torque angle (MTA) of the relay setting (typically 85°) (Z GCC ).In particular situations when the generator distance phase backup protection relay is mainly required to provide thermal backup protection for the generator against transmission line faults, which are not cleared by transmission line relays, Relay (21) is set directly according to the second criterion (which is the setting considered during the investigations of this paper). The

show abstract

“…Also, when a generator loses its excitation, other generators in the system will increase their reactive power output. This may cause the overloading in some transmission lines or transformers and the over-current relay may consider this overloading as a fault and isolate the non-fault equipment [4][5][6][7][8][9][10][11][12][13][14]. These above reasons motivate this research work to solve for this problem.…”

mentioning

confidence: 99%