WAMS applications in Chinese power systems

Xie, Xiaorong; Xin, Yaozhong; Xiao, Jinyu; Wu, Jingtao; Han, Yingdao

doi:10.1109/mpae.2006.1578532

Cited by 117 publications

(13 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Quick comparison of the two clustering approaches indicates that (a) there is a difference in objective function and (b) FCMdd selects the medoids within the matrix columns whereas FCM computes fictitious centers according to (9).…”

Section: Fuzzy Medoids Algorithm (Fcmdd)mentioning

confidence: 99%

Automatic Segmentation of Large Power Systems Into Fuzzy Coherent Areas for Dynamic Vulnerability Assessment

Kamwa

Pradhan

Joós

2007

IEEE Trans. Power Syst.

101

View full text Add to dashboard Cite

This paper proposes a technique for partitioning a large power system into a number of coherent electric areas for possible application to dynamic vulnerability assessment. The coherency concept and a fuzzy clustering algorithm grouping of buses are combined to achieve this goal. The clusters are obtained by selecting representative buses from the data set in such a way that the total fuzzy dissimilarity within each cluster is minimized. The initialization problem of the conventional Fuzzy c-means algorithm, which usually leads to multiple solutions, is suitably tackled by incorporating the maximum-dissimilarity based sequential Phasor Measurement Unit (PMU) placement technique. Results of bus grouping for two test systems of three and nine areas demonstrate the potential of the approach. It is observed that such an approach to bus grouping results in a PMU configuration with minimum number of devices and fast data aggregation for a wide-area measurement system. Index Terms-Coherency, coherent area, network partitioning, phasor measurement units (PMU), PMU placement, power system monitoring, power system stability, vulnerability assessment, widearea measurements.

show abstract

Section: Fuzzy Medoids Algorithm (Fcmdd)mentioning

confidence: 99%

Automatic Segmentation of Large Power Systems Into Fuzzy Coherent Areas for Dynamic Vulnerability Assessment

Kamwa

Pradhan

Joós

2007

IEEE Trans. Power Syst.

101

View full text Add to dashboard Cite

show abstract

“…The processing delay is the amount of time required in converting transducer data into phasor information with the help of the discrete Fourier transform (DFT) [1,9]. In power system control, the total measurement delay is reported to be on the order of milliseconds [1][2][3]. The total communication delays, especially in multiarea LFC systems, can vary from 10 to several hundred milliseconds [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…The phasor measurement units (PMUs) and open communication networks have been extensively used in wide-area measurement/monitoring systems. This causes inevitable time delays, which include measurement and communication delays [1,2]. Such time delays may reduce the control system damping performance and could even cause instability if they exceed the upper bound or delay margin for stability [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Effect of load increase and power system stabilizer on stability delay margin of a generator excitation control system

Sönmez¹,

Ayasun²

2016

Turk J Elec Eng & Comp Sci

View full text Add to dashboard Cite

This paper studies the impact of load increase and a power system stabilizer (PSS) on the stability delay margin of a single-machine-infinite-bus system including an automatic voltage regulator. An analytical method is proposed to determine the stability delay margin of the excitation control system. The proposed method first eliminates transcendental terms in the characteristic equation of the excitation system without making any approximation and transforms the transcendental characteristic equation into a regular polynomial. The key result of the elimination process is that the real roots of the new polynomial correspond to the imaginary roots of the transcendental characteristic equation. With the help of the new polynomial, it is also possible to determine the delay dependency of system stability and the root tendency with respect to the time delay. Delay margins are computed for various loading conditions and PSS gains. It is observed that the delay margin generally decreases as the PSS gain and load demand increase, resulting in a less stable system.

show abstract

“…As its consequence, generator information can be obtained in the control center(s) all at once. Generator operation status monitoring and transient angle stability are some examples of such applications (Xiaorong et al, 2006). …”

Section: Generation Aplicationsmentioning

confidence: 99%

“…After introducing PMUs to the power systems, the information provided by these units can also used for GSM application (Xiaorong et al, 2006). This has been resulted from the fact that PMUs provide phasor data in real time with very high sampling rate (up to 60 samples per second).…”

Section: Generation Aplicationsmentioning

confidence: 99%