An Improved Real-Time Short-Term Voltage Stability Monitoring Method Based on Phase Rectification

Ge, Huaichang; Guo, Qinglai; Sun, Hongbin; Wang, Bin; Zhang, Boming; Liu, Junlei; Yang, Yong; Feng, Qian

doi:10.1109/tpwrs.2017.2688129

Cited by 22 publications

(13 citation statements)

References 5 publications

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“…Thus, the basic LE algorithm can be improved to avoid oscillation issues by selecting the optimal or suitable parameters and computation window through systematic or empirical methods such as those have been in [13,20]. For example, the LE is estimated by a recursive least squares based method in [13,20], and two critical parameters, the computation window and the LE estimation initial time step, are carefully chosen or, in [13,20], a phase rectification method has been proposed to eliminate the negative influence of oscillation of LE. These methods improve the LE performance in the cost of increasing method complexity and serving a considerable time for setting parameters for a specific system and a specific stability study.…”

Section: Considermentioning

confidence: 99%

“…In [7], a data-driven method based on the voltage magnitude measured by PMUs has been explained for LE calculation. In [13], the authors have discussed the influence of oscillations and improper parameter settings in instability detection with LE; they proposed an improved phase rectification (PR)-based SVS monitoring method which removes that weakness using modal analysis. In [14], the authors have introduced a framework which uses the PMUs data for calculating LEs.…”

Section: Introductionmentioning

confidence: 99%

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Analyzing Six Indices for Online Short-Term Voltage Stability Monitoring in Power Systems

et al. 2020

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In recent years, the importance of online monitoring short-term voltage stability has been considerably increased. Unstable cases due to response of fast dynamic loads such as induction motors to the serious disturbances can be avoided by online monitoring of voltage transients and activating fast and appropriate controls to encounter deep and prolonged voltage drop. In this paper, a set of indices based on the phasor measurement unit (PMU) measurements are introduced and compared for short-term voltage stability. To increase efficiency of the indices, a special algorithm for each index is proposed by using the investigation of the results of applying them to six disturbances’ scenarios simulated on the IEEE 39 bus system. The disturbance scenarios are representative of different cases of stable, unstable, and deep and prolonged voltage drop associated with short-term voltage transients. The performance of these indices are studied in terms of the time and accuracy required for determining the short-term voltage stability/instability cases. It is shown that the proposed method has better performance in comparison with other techniques that can be applied to power systems in reality.

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Section: Considermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analyzing Six Indices for Online Short-Term Voltage Stability Monitoring in Power Systems

et al. 2020

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“…The stator rotating frequency is invariable and maintained at 1.0 pu. Hence, the mechanical power P m shown in Equation 8can be transformed to the function of slip s slip : Figure 11 illustrates the air-gap power and mechanical power with respect to slip according to Equations (11) and (12). As shown in the figure, there are three intersection points when the infinite voltage is 1.0 pu, and the normal operating point is point D 1 .…”

Section: Abnormally Low Voltage Analysismentioning

confidence: 99%

Active and Reactive Power Joint Balancing for Analyzing Short-Term Voltage Instability Caused by Induction Motor

Wang

Shen

et al. 2019

Energies

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Short-term voltage instability has a sensational effect once it occurs with massive loss of load, possibly area instability, and voltage collapse. This paper analyzes the short-term voltage instability caused by induction motor from the viewpoint of active and reactive power joint balancing. The analysis method is based on (1) the reactive power balancing between system supply and induction motor demand, and (2) the active power balancing between air-gap power and mechanical power, which is expressed by the region of rotor acceleration and deceleration in the Q-V plane. With the region of rotor acceleration and deceleration in the Q-V plane and the reactive power balancing, the movement direction of the operating point can be visually observed in the Q-V plane, thereby achieving a clear comprehension of physical properties behind the short-term voltage instability phenomenon. Furthermore, the instability mechanisms of two kinds of grid-connected induction motor operation conditions after a large disturbance are discussed to explain the basic theory of the analysis method and to provide examples of its application. Time-domain simulations are presented for a single-load infinite-bus system to validate the analyses.

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“…The use of Lyapunov exponents for transient rotor angle stability and SVS analysis is proposed in [30][31][32][33]. In particular, an algorithm to calculate the maximum Lyapunov exponent of a single trajectory [32] is shown in (5), which have given us inspiration for construction SVSI l .…”

Section: Svsi S : Describe the Level Of Transient Voltage Oscillationmentioning

confidence: 99%

Practical short‐term voltage stability index based on voltage curves: definition, verification and case studies

Zhao

Guo

Sun

et al. 2018

IET Generation, Transmission & Distribution

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An Improved Real-Time Short-Term Voltage Stability Monitoring Method Based on Phase Rectification

Cited by 22 publications

References 5 publications

Analyzing Six Indices for Online Short-Term Voltage Stability Monitoring in Power Systems

Analyzing Six Indices for Online Short-Term Voltage Stability Monitoring in Power Systems

Active and Reactive Power Joint Balancing for Analyzing Short-Term Voltage Instability Caused by Induction Motor

Practical short‐term voltage stability index based on voltage curves: definition, verification and case studies

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