scholarly journals Resilient State Estimation in Presence of Severe Coordinated Cyber-Attacks on Large-Scale Power Systems

2020 ◽  
Author(s):  
Ana Jevtic ◽  
Marija Ilic
Keyword(s):  
Power Systems ◽  
State Estimation ◽  
Large Scale ◽  
Cyber Attacks

scholarly journals Methodology for Implementing the State Estimation in Renewable Energy Management Systems

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2301
Author(s):  
Yun-Sung Cho ◽  
Yun-Hyuk Choi
Keyword(s):  
Renewable Energy ◽  
Power Systems ◽  
State Estimation ◽  
Measurement Errors ◽  
Large Scale ◽  
Test System ◽  
The State ◽  
Inner Function ◽  
Outer Function ◽  
Bad Data

This paper describes a methodology for implementing the state estimation and enhancing the accuracy in large-scale power systems that partially depend on variable renewable energy resources. To determine the actual states of electricity grids, including those of wind and solar power systems, the proposed state estimation method adopts a fast-decoupled weighted least square approach based on the architecture of application common database. Renewable energy modeling is considered on the basis of the point of data acquisition, the type of renewable energy, and the voltage level of the bus-connected renewable energy. Moreover, the proposed algorithm performs accurate bad data processing using inner and outer functions. The inner function is applied to the largest normalized residue method to process the bad data detection, identification and adjustment. While the outer function is analyzed whether the identified bad measurements exceed the condition of Kirchhoff’s current law. In addition, to decrease the topology and measurement errors associated with transformers, a connectivity model is proposed for transformers that use switching devices, and a transformer error processing technique is proposed using a simple heuristic method. To verify the performance of the proposed methodology, we performed comprehensive tests based on a modified IEEE 18-bus test system and a large-scale power system that utilizes renewable energy.

GPU-accelerated state estimation for large-scale power systems

2021 ◽  
Author(s):  
Meng Fu ◽  
Yang Li ◽  
Jimin Hua ◽  
Yanjun Feng ◽  
Yifan Zheng
Keyword(s):  
Power Systems ◽  
State Estimation ◽  
Large Scale

scholarly journals Secure state estimation for nonlinear power systems under cyber attacks

2017 ◽  
Author(s):  
Qie Hu ◽  
Dariush Fooladivanda ◽  
Young Hwan Chang ◽  
Claire J. Tomlin
Keyword(s):  
Power Systems ◽  
State Estimation ◽  
Cyber Attacks

scholarly journals Analysis of cyber vulnerabilities of the emergency control and relay protection to assess the reliability and survivability of electrical power systems in the era of total digitalization

2020 ◽  
Vol 216 ◽  
pp. 01040
Author(s):  
Alexey Osak ◽  
Daniil Panasetsky ◽  
Elena Buzina
Keyword(s):  
Power Systems ◽  
Control Systems ◽  
Large Scale ◽  
Electrical Power ◽  
Relay Protection ◽  
Distribution Networks ◽  
Cyber Attacks ◽  
Small Scale ◽  
Electrical Power Systems ◽  
Emergency Control

Cyber threats pose an increasing threat to energy objects. It is essential to ensure the cybersecurity of automatic control systems, such as relay protection devices (RP), devices of regime control (RC) and emergency control (EC), automated control systems. At the same time, the issues of cybersecurity include not only the problem of hacker attacks, but also the whole complex of problems relating to adequate functioning of cybernetic systems in the power industry. The authors consider two of the most acute aspects of cybersecurity in the energy systems of the future in the era of total digitalization: large-scale prepared cyber attacks on the electrical power systems (EPS) as a whole and large-scale cyber attacks on distribution networks with small-scale generation facilities and active consumers.

A survey on cyber attacks against nonlinear state estimation in power systems of ubiquitous cities

2017 ◽  
Vol 39 ◽  
pp. 52-64 ◽  
Author(s):  
Jingxuan Wang ◽  
Lucas C.K. Hui ◽  
S.M. Yiu ◽  
Eric Ke Wang ◽  
Junbin Fang
Keyword(s):  
Power Systems ◽  
State Estimation ◽  
Cyber Attacks ◽  
Nonlinear State Estimation ◽  
Nonlinear State
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