Abstract
With the consideration of randomness of distributed generations and loads, this paper has proposed a method for vulnerability assessment of microgrids based on complex network theory and entropy theory, which can explain the influence of the inherent structure characteristics and system internal energy distribution on the microgrid. The vulnerability assessment index is built, and the on-line reconfiguration model considering the vulnerability assessment of microgrid is also established. An improved cellular bat algorithm is tested on the CERTS system to implement the real time reconfiguration fast and accurately to provide the basis of theory and practice.
Highlights
Modern society has become more dependent on the secure distribution of electricity
Considering the static structure and dynamic operation characteristic of the microgrid, this paper has proposed the application of weighted entropy theory in vulnerability assessment indexes of microgrids based on complex networks theory
The mathematical model of MOLR is established aiming at a minimal vulnerability value
Summary
Modern society has become more dependent on the secure distribution of electricity. The probability of incorrect operation may increase as a result of higher complexity when reinforcing the protection to guarantee dependability [1]. The vulnerability of the conventional power grid has been fully exposed by several outage accidents in recent years. Microgrids have been introduced as a promising solution due to their potential benefits to provide secure, stable and efficient environmentally friendly electricity, but vulnerability is an inherent property. Entropy 2014, 16 vulnerability is a measure of the weakness and the incidence of sections or lines with respect to cascading events. Analyzing and identifying the microgrid vulnerability on the basis of mathematical theory is the necessary precondition for monitoring and security control for future development
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