Journal ArticleDOI
Voltage Stability Monitoring Based on the Concept of Coupled Single-Port Circuit
Yunfei Wang,Iraj Rahimi Pordanjani,Weixing Li,Wilsun Xu,Tongwen Chen,Ebrahim Vaahedi,J. Gurney +6 more
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TLDR
In this article, a coupled single-port circuit (CSPC) is proposed to estimate voltage stability margin and identify weak areas in a system based on the SCADA and PMU data.Abstract:
This paper reveals that the impedance match (or the Thevenin circuit) based voltage stability monitoring techniques have problems to predict voltage stability limits when applied to multi-load power systems. Power system loads are nonlinear and dynamic. They cannot be simply represented as Thevenin circuit parameters for impedance match analysis. To overcome these difficulties, a new concept called “coupled single-port circuit” is proposed in this paper. The concept decouples a meshed network into individual single generator versus single bus network and, as a result, a modified version of the impedance match theorem can be used. This leads to a real-time voltage stability monitoring scheme without the need to estimate Thevenin parameters. The scheme can estimate voltage stability margin and identify weak areas in a system based on the SCADA and PMU data. Case studies conducted on several test systems have verified the validity of the proposed method.read more
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Journal ArticleDOI
Adaptive load shedding based on combined frequency and voltage stability assessment using synchrophasor measurements
TL;DR: In this article, a centralized, adaptive load shedding algorithm, which uses both voltage and frequency information provided by phasor measurement units (PMUs), is proposed, and the main contribution of the new method is the consideration of reactive power together with active power in the load shedding strategy.
Journal ArticleDOI
Wide-Area Measurement-Based Voltage Stability Indicators by Modified Coupled Single-Port Models
Jian-Hong Liu,Chia-Chi Chu +1 more
TL;DR: In this article, a modified coupled single-port model is proposed based on real-time PMU measurements of individual load bus, the reactive power response used in the extended Ward-type equivalent will be explored to compensate for reactive power mismatch in the existing model.
Journal ArticleDOI
Estimating the Voltage Stability Margin Using PMU Measurements
Heng-Yi Su,Chih-Wen Liu +1 more
TL;DR: In this article, a new method based on phasor measurement units (PMUs) was proposed for the estimation of voltage stability margin in a power system to increase operator's situational awareness.
Journal ArticleDOI
Measurement-Based Real-Time Voltage Stability Monitoring for Load Areas
TL;DR: In this paper, a measurement-based voltage stability monitoring method for a load area fed by N tie lines is proposed, which adopts an N $+1$ buses equivalent system so as to model and monitor individual tie lines.
Journal ArticleDOI
Development and Application of a New Voltage Stability Index for On-Line Monitoring and Shedding
TL;DR: In this paper, the authors proposed a new normalized voltage stability indicator called the P-index that is robust and based on solid theoretical foundations, which was tested on the IEEE 14-, 57-, and 118-bus systems and compared to the well-established L-index node-based indicator.
References
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Journal ArticleDOI
Estimating the Voltage Stability of a Power System
P. Kessel,H. Glavitsch +1 more
TL;DR: In this article, a method for the online testing of a power system is proposed which is aimed at the detection of voltage instabilities, and an indicator L is defined which varies in the range between 0 (noload of system) and 1 (voltage collapse).
Journal ArticleDOI
Voltage Stability Evaluation Using Modal Analysis
B. Gao,G.K. Morison,P. Kundur +2 more
TL;DR: In this paper, the voltage stability analysis of large power systems by using a modal analysis technique is discussed, using a steady-state system model, a specified number of the smallest eigenvalues and the associated eigenvectors of a reduced Jacobian matrix.
Journal ArticleDOI
Use of local measurements to estimate voltage-stability margin
TL;DR: In this article, a new data processing method is proposed to estimate the proximity to voltage collapse in real-time, which employs only local measurements-bus voltage and load current-and calculates the strength of the transmission system relative to the bus.
Journal ArticleDOI
WACS-Wide-Area Stability and Voltage Control System: R&D and Online Demonstration
TL;DR: Online demonstration of a new response-based (feedback) Wide-Area stability and voltage Control System (WACS) is described, developed as a flexible platform to prevent blackouts and facilitate electrical commerce.
Journal ArticleDOI
Voltage-stability protection and control using a wide-area network of phasor measurements
B. Milosevic,Miroslav M. Begovic +1 more
TL;DR: In this paper, the onset of voltage collapse point is calculated based on the load characteristics and simulated voltage and current phasors measurements, which are provided by a network of phasor-measurement units.
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