NDLI: Risk assessment of power system security based on component importance and operation state

Content Provider	IEEE Xplore Digital Library
Author	Pei-Qing Liu Hua-Qiang Li Yang Du Ke Zeng
Copyright Year	2014
Description	Author affiliation: Sch. of Electr. Eng. & Inf., Sichuan Univ., Chengdu, China (Pei-Qing Liu; Hua-Qiang Li; Ke Zeng) \|\| Deyang Electr. Power Supply Co., State Grid, Deyang, China (Yang Du)
Abstract	With the great increasing of power system scale and complexity, the risk of power system operating security has been a focus for researchers. The power system security is not only involve the real operation state of the system, which is the practice of traditional assessment methods generally used, but also needed to synthetically consider other important issues such as the influence of system structure and the otherness of different components. This paper presents a new method for risk assessment of the power system security. First of all, from the perspective of systematology, a component comprehensive importance index model was built considering the inherent properties of components in the system. Secondly, an improved low-voltage severity index and an improved overload severity index were built via introducing the component comprehensive importance model into the risk assessment method as the weight factor. And then, a severity model was set to characterize the severity of the balance of grid power flow distribution and the load losing, basing on the operation state of the system and the power flow entropy theory, Therefore, a risk assessment method of power grid security based on both component importance and operation state was proposed, At last, the simulation results of IEEE-30 system illustrates the rationality of the proposed method to assess grid N-1 contingency risk and better accuracy in identifying the risk of every grade in N-k fault series comparing to the traditional methods, thus the validity and feasibility of proposed method is proved.
Starting Page	318
Ending Page	323
File Size	624491
Page Count	6
File Format	PDF
ISBN	9781479950324
DOI	10.1109/POWERCON.2014.6993626
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-10-20
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Indexes Load flow Accidents Risk management Sensitivity Security severity security assessment risk operation state component importance
Content Type	Text
Resource Type	Article

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