An improved continuation power flow algorithm for identifying limit-induced bifurcation point of static voltage stability

2006 ◽  
Author(s):  
Qi Wang ◽  
Mingbo Liu
Keyword(s):  
Bifurcation Point ◽  
Power Flow ◽  
Voltage Stability ◽  
Continuation Power Flow ◽  
Static Voltage Stability ◽  
Flow Algorithm

scholarly journals Voltage Stability Bifurcation Analysis for AC/DC Systems with VSC-HVDC

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Yanfang Wei ◽  
Zheng Zheng ◽  
Yonghui Sun ◽  
Zhinong Wei ◽  
Guoqiang Sun
Keyword(s):  
Bifurcation Analysis ◽  
Bifurcation Point ◽  
Power Flow ◽  
Voltage Stability ◽  
Power Model ◽  
Sequential Method ◽  
Saddle Node Bifurcation ◽  
Continuation Power Flow ◽  
Flow Algorithm ◽  
And Control

A voltage stability bifurcation analysis approach for modeling AC/DC systems with VSC-HVDC is presented. The steady power model and control modes of VSC-HVDC are briefly presented firstly. Based on the steady model of VSC-HVDC, a new improved sequential iterative power flow algorithm is proposed. Then, by use of continuation power flow algorithm with the new sequential method, the voltage stability bifurcation of the system is discussed. The trace of the P-V curves and the computation of the saddle node bifurcation point of the system can be obtained. At last, the modified IEEE test systems are adopted to illustrate the effectiveness of the proposed method.

The Static Voltage Stability Limit Calculation of AC/DC Hybrid Power System Based on Improved Continuation Power Flow Algorithm

2013 ◽  
Vol 347-350 ◽  
pp. 1450-1454
Author(s):  
Hong Jun Fu ◽  
Jian Hua Sun ◽  
Jing Gang Wang ◽  
Yang Yu Hu
Keyword(s):  
Power System ◽  
Power Flow ◽  
Voltage Stability ◽  
Stability Limit ◽  
Hybrid Power System ◽  
Continuation Power Flow ◽  
Static Voltage Stability ◽  
Hybrid Power ◽  
Flow Algorithm ◽  
Step Control

With the HVDC system interconnected to power grid, the voltage stability problem of power grid has become increasingly prominent. This paper establishes the mathematical model of AC/DC hybrid power system and proposed an improved Continuation Power Flow (CPF) algorithm to calculate the static voltage stability limit of AC/DC hybrid system, the characteristics of this algorithm are as following: PQ decoupled power flow algorithm is used; Lagrange quadric interpolation is used in the process of predictor and step control; local parameter method is used in the correction. The iterations of AC/DC calculation alternate to solve power flow equations and select the step control near the critical power limit points to ensure the convergence of power flow solution. In order to verify the correctness of the proposed algorithm, this paper compares the calculation results by the improved algorithm and Matpower on the IEEE 14 bus-system. This paper calculates the static voltage stability limit of AC/DC hybrid power system under different DC control patterns of modified IEEE 14 bus-system and analyzes the impacts of different DC control pattern to the system voltage stability.

Sign in / Sign up

Export Citation Format

Share Document