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With the rapid development of power system and the integration of renewable energy sources, the uncertainties of power system become more complex, which introduce a more challenging for the assessment of voltage stability. This paper presents an analytical solution of static voltage stability assessment based on the PQ plane analysis method with elaborately selected voltage stability indices, and...
Based on an advanced distributed real-time platform named Real-Time Laboratory (RT-LAB), the impacts of the static synchronous compensator (STATCOM) on wind power system dynamics is studied in this paper. Firstly, a small-scale wind farm model based on squirrel-cage induction generator (SCIG) is built in MATLABTM/Simulink environment. This model is then rebuilt to be suitable for the real-time operation...
Conventional voltage vulnerability assessment methods and indices as well as weak area identification are one-sided and inconsistent with each other. Specially most of solutions are deterministic without considering the uncertainties in nature. Based on Super-Efficiency Data Envelopment Analysis (SEDEA) model, a multi-criteria integrated probabilistic voltage vulnerability assessment method is proposed...
The first ±800kV UHVDC transmission system is connected with the East China power grid around 2010 and its maximum transfer capacity will reach to 6.4GW. It brings new challenges and impacts on the network structure, operation security and reliability and system stability. In the paper, East China power gird configuration and load level for 2012 is adopted as base case for study. The power system...
How to identify the weak buses comprehensively and practically in power system voltage stability analysis is an important issue, and is posing great interests to the power engineers. In this paper, a multi-criteria integrated voltage stability index was proposed for weak buses identification. Firstly, the bus voltage change index and reactive power margins, which were determined by P-V curve and Q-V...
A new equivalent model based on phaser measurement unit (PMU) is proposed to analyze and predict the voltage stability of a transmission corridor. This equivalent model retains all transmission lines in a transmission corridor, which is more detailed and accurate than traditional Thevenin equivalent model widely used. To estimate parameters of the proposed model, Newton method or the least square...
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