scholarly journals Frequency Monitoring and Control during Power System Restoration Based on Wide Area Measurement System

2011 ◽  
Vol 2011 ◽  
pp. 1-13 ◽  
Author(s):  
Saber Nourizadeh ◽  
Vahid Yari ◽  
Ali Mohammad Ranjbar
Keyword(s):  
Power System ◽  
Measurement System ◽  
Frequency Control ◽  
Area Measurement ◽  
Wide Area ◽  
Load Modeling ◽  
Wide Area Measurement System ◽  
Power System Restoration ◽  
System Restoration ◽  
Simulation Results

Frequency control during power system restoration has not been strongly addressed. Operators are often concerned with the offline sizing of load and generation steps, but, nowadays, the introduction of Wide Area Measurement System (WAMS) makes it possible to monitor the stability of power system online. The constraints of WAMS operation result in some changes in power system frequency control. This paper proposes a novel methodology for frequency control and monitoring during the early steps of power system restoration based on WAMS. Detailed load modeling is achieved based on the static load modeling approach. Power generators' modeling is also accomplished utilizing the single machine equivalent of the power system based on PMU measurements. Simulation results of the presented methodology on the 39 bus New England power system clearly show the effectiveness and applicability of the proposed method. The simulation results show that the presented approach has a completely acceptable precision and an outstanding speed with less than 0.05% error. The outstanding speed of the presented approach along with the result precision will result in a great promotion in power system restoration methodologies.

Identification the Low-Frequency Oscillation Stakeout of Power System by Wide-Area Measurement System

2011 ◽  
Vol 128-129 ◽  
pp. 594-601
Author(s):  
Yang Liu ◽  
Qian Huang ◽  
Dong Chen
Keyword(s):  
Power System ◽  
Measurement System ◽  
Rapid Development ◽  
Oscillation Mode ◽  
Low Frequency ◽  
Area Measurement ◽  
Wide Area ◽  
Frequency Oscillation ◽  
Low Frequency Oscillation ◽  
Wide Area Measurement System

With the rapid development of interconnected power grid, the phenomenon of power system low-frequency oscillation appears unavoidably. Then, the appearance of wide-area measurement system provided a supporting technology for better scout low-frequency oscillation system and better recognize the oscillation mode . In this paper, the existing oscillation mode identifying methods are analyzed from the viewpoint of calculation speed, criterion, calculation accuracy, etc. Mainly compared the applicability of two methods, Prony and ESPRIT . Based on the above research, a new idea of monitoring power system low frequency oscillation based on WAMS is put forward in this paper.

scholarly journals A New Power System Restoration Technique based on WAMS Partitioning

2017 ◽  
Vol 7 (4) ◽  
pp. 1811-1819 ◽  
Author(s):  
N. V. Phanendra Babu ◽  
P. Suresh Babu ◽  
D. V. S. S. Siva Sarma
Keyword(s):  
Power System ◽  
Load Balance ◽  
Area Measurement ◽  
Optimal Placement ◽  
Power Network ◽  
Communication Failure ◽  
Wide Area Measurement System ◽  
Power System Restoration ◽  
Restoration Technique ◽  
System Restoration

An important feature of a Wide-Area Measurement System (WAMS) is the ability to recover data during a communication failure. This paper presents a novel scheme of partitioning a PMU installed power network into a number of WAMS regions in order to make the power system restoration process simpler. This algorithm also proposes the optimal placement of Phasor Data Concentrators (PDCs) in each region to record the data from PMUs. This paper considers the restoration constraints like transformer equivalent bus, generation-load balance and the observability of region for the partitioning of power system. The proposed scheme is demonstrated with an IEEE-30 bus system. It is then applied on IEEE-39, IEEE-118 bus systems and on a Northern Regional Grid of the Indian Power Grid.

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