Emergency control scheme for transient stability using synchronized measurement

2012 ◽  
Author(s):  
Xiaochen Du ◽  
P. Crossley
Keyword(s):  
Transient Stability ◽  
Emergency Control ◽  
Control Scheme

scholarly journals Area-Based COI-Referred Rotor Angle Index for Transient Stability Assessment and Control of Power Systems

2012 ◽  
Vol 2012 ◽  
pp. 1-23 ◽  
Author(s):  
Noor Izzri Abdul Wahab ◽  
Azah Mohamed
Keyword(s):  
Power Systems ◽  
Power System ◽  
Transient Stability ◽  
Stability Index ◽  
Test System ◽  
Emergency Control ◽  
Control Scheme ◽  
Rotor Angle ◽  
The Stability ◽  
And Control

This paper describes an index for judging the severity of transient events of power systems in simulation. The proposed transient stability index, known as the area-based COI-referred rotor angle index, is developed by considering the fact that a large-sized power system is divided into several areas according to the coherency of generators in a particular area. It can be assumed that an equivalent single large machine can represent all the generators in that area. Thus, the assessment of rotor angles for all generators can be simplified by only assessing the index of areas in a power system. The effectiveness of the proposed index in assessing the stability of power systems and its ability in pinpointing the weakest area in the power system is analyzed. Furthermore, this paper developed an emergency control scheme known as the combined UFLS and generator tripping in order to stabilize the system when unstable faults occurred in a power system. The proposed index is used to identify the generator to be tripped when the developed emergency control scheme operates. The performance of the proposed index and the combined UFLS and generator tripping scheme are evaluated on the IEEE 39-bus test system.

scholarly journals Transient stability control by means of under-frequency load shedding and a hybrid control scheme

2017 ◽  
Vol 28 (4) ◽  
Author(s):  
P. F. Le Roux ◽  
R.C. Bansal
Keyword(s):  
Transient Stability ◽  
Hybrid Control ◽  
Stability Control ◽  
Load Shedding ◽  
Electrical Network ◽  
Traditional Methods ◽  
Transient Fault ◽  
System A ◽  
Control Scheme ◽  
Hybrid Control Scheme

An electrical network constantly faces unforeseen events such as faults on lines, loss of load and loss of generation. Under-frequency load shedding and generator tripping are traditional methods used to stabilise a network when a transient fault occurs. These methods will prevent any network instability by shedding load or tripping the most critical generator at a calculated time when required. By executing these methods, the network can be stabilised in terms of balancing the generation and the load of a power system. A hybrid control scheme is proposed where the traditional methods are combined to reduce the stress levels exerted on the network and to minimise the load to be shed.

Optimal Comprehensive Control of Prevention and Emergency Based on DSR and Probabilistic Insecurity Measurement

2013 ◽  
Vol 694-697 ◽  
pp. 1237-1240
Author(s):  
Huai Dong Liu ◽  
Wei Feng ◽  
An Chang ◽  
Wen Shuang Liu ◽  
Qing Li ◽  
...  
Keyword(s):  
Transient Stability ◽  
Linear Optimization ◽  
Stability Control ◽  
Optimization Strategy ◽  
Improved Genetic Algorithm ◽  
Preventive Control ◽  
Emergency Control ◽  
Security Region ◽  
The Cost ◽  
Dynamic Security Region

Transient stability control of power system is a non-linear optimization problem which contains many constraints. Considering the cost of preventive control, emergency control and the following restorative control synthetically, a model of preventive control and emergency control based on DSR(Dynamic Security Region) and probabilistic insecurity measurement is proposed in the paper, and the optimal operating point of the system was obtained by using the improved genetic algorithm. In the end, the feasibility of the model and optimization strategy are verified by the case of the IEEE 4-generators 11-nodes system. Simulation show that the cost of comprehensive control of prevention and emergency is 13.2% less than the case that without the consideration of the random factors of the fault.

scholarly journals Power System Transient Stability Preventive and Emergency Control

2014 ◽  
pp. 123-158
Author(s):  
Daniel Ruiz-Vega ◽  
Louis Wehenkel ◽  
Damien Ernst ◽  
Alejandro Pizano-Martínez ◽  
Claudio R. Fuerte-Esquivel
Keyword(s):  
Power System ◽  
Transient Stability ◽  
Emergency Control
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