A modified self-organization method for power system risk assessment concerning influences of ultra-high-voltage transmission lines

作者：Ye, Guanhao^*; Zhang, Yan; Zhang, Zhiqiang

来源：Automation of Electric Power Systems, 2015, 39(13): 44-50 and 157.

DOI：10.7500/AEPS20140815004

• Cascading failures
• DC power flow calculation
• Regional power systems
• Risk evaluation
• Self organizations
• Self-organization method
• Self-organized criticality
• Ultra-high-voltage transmission lines

Based on the self-organization theory, and considering the voltage control in fast process, a comprehensive simulation analysis on the cascading failure conditions for power systems with ultra-high-voltage(UHV) transmission lines is conducted by optimal DC power flow calculation and serial Monte Carlo simulation. Then the power failure risks are assessed by related risk indexes. According to the self-organized criticality balance progress, the relationship between the daily mean fault branch number, load increasing rate, branch restoration index and total branch number is derived at the time the balance between the power flow of branches and capacity increase is reached. Case studies show that the risk assessment results using the self-organization method are closely related to the load development level. Finally, the modified self-organization method is adopted to evaluate the power failure risks of regional power systems with UHV transmission lines, and the rationality of the theory analysis is verified.

• 出版日期2015
• 单位上海交通大学