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Investigation of Power System Voltage Stability Contingency Ranking

Author: ZhangZuo
Tutor: TangYong；MaShiYing
School: China Electric Power Research Institute
Course: Proceedings of the
Keywords: Voltage stability Failure Sort Loss sensitivity Second-order indicators Load Reactive reserve
CLC: TM712
Type: Master's thesis
Year: 2007
Downloads: 62
Quote: 0
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Abstract


The rapid development of China's power industry , grid scale is gradually expanding the power system voltage stability problems become the focus of the study , therefore explore the mechanism of power system voltage instability , to find the factors that affect the stability of the power system voltage and to measure the severity of system failures , has become an increasingly important task of the majority of electricity workers . Proceeding from the power system voltage stability analysis methods and indicators to measure the voltage stability , to explore the many aspects of voltage stability , the main results are as follows : 1 . Different voltage stability index , the choice of a second order loss sensitivity reference indicators as a measure of system failure severity , the indicators linearity is better, faster computation time , can better estimate the load margin in each case . Simple system simulation analysis proved that the system reactive power reserves and voltage stability margin exists between certain contact , and analysis to verify the correctness of the conclusion with the simulation of the actual system , which provides for scheduling staff one can quickly understand the system voltage stability margin method for the analysis of the stability of the system . And as part of the failure Sort primaries . Written using Visual C sort program based on the the loss sensitivity second order system failure , the software implements interface with PSD-BPA program to calculate the the loss sensitivity under different fault on second order . The actual grid simulation study of a closely linked grid connected by external the grid impact is very small , so the analysis of voltage stability index is calculated based on the actual situation , and basically not to consider or be considered a part of the external network are concerned about the impact of the grid . 5 Analysis of the impact of the load on the power system voltage stability and voltage through the simulation of the actual grid failure , verify the different load model of the system voltage , based on analysis of two meter and load voltage characteristics stability indicators , these two indicators as the complement of the sensitivity index .

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Theory and Analysis > Power system stabilizer
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