Power grid fault diagnosis and restoration method with consideration of multiple information source fusion

Abstract

The invention provides a power grid fault diagnosis and restoration method with consideration of multiple information source fusion. The method comprises steps of a, establishing a correlation equation set for reflecting variation of various buses between two sampling time points based on bus voltages and branch power flow synchronous measurement information between the two adjacent sampling time points, and determining sensitivity to bus voltage of buses intensively subjected to active power injection and reactive power injection by voltage security and stability monitoring equipment; and b, establishing a constrained 0-1 integer programming model with an object that the control cost is least, and computing voltage security and stability pre-decision emergency control measurements by solving the 0-1 integer programming model. The invention performs voltage security and stability self-adaptive emergency control research based on synchronous measurement information. Based on the bus voltages and branch power flow synchronous measurement information between the two adjacent sampling time points, a correlation equation for reflecting the relation between voltage variation of each bus and active power and reactive power variation of each bus load is established, and an optimization method is adopted for simultaneous solution, so that sensitivity to bus voltage of buses intensively subjected to active power injection and reactive power injection by the voltage security and stability monitoring equipment is obtained. In addition, the voltage security and stability pre-decision emergency control measurements are computed by solving the 0-1 integer programming model.

Description

technical field [0001] The invention relates to the technical field of power grid risk assessment, more specifically, to a power grid fault diagnosis and recovery method considering the fusion of multiple information sources. Background technique [0002] In recent years, frequent natural disasters and external damage accidents have become new problems faced by the power grid. Take Zhejiang as an example. As an important economic center in East China, it is also one of the provinces most severely hit by natural disasters. [0003] In 2013, affected by Typhoon Fit, Yuyao, Zhejiang suffered the most serious flood since the founding of New China. More than 70% of the urban area was flooded, and all the main urban areas were cut off for several days, which seriously affected the lives of residents and caused a direct economic loss of nearly 7 billion yuan. ;The ice disaster in early 2008 had a serious impact on the Zhejiang power grid, and the damage to the 500kV power grid ran...

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Problems solved by technology

[0003] In 2013, affected by Typhoon Fit, Yuyao, Zhejiang suffered the most serious flood since the founding of New China. More than 70% of the urban area was flooded, and all the main urban areas were cut off for several days, which seriously affected the lives of residents and caused a direct economic loss of nearly 7 billion yuan. ;The ice disaster in early 2008 had a serious impact on the Zhejiang power grid, and the damage to the 500kV power grid ranked first in the State Grid; in addition, the frequent occurrence of various disasters such as lightning strikes, wildfires, and squall winds also affected the safe and stable operation of the power grid. It poses a serious threat. On August 28, 2009, the busbar of Tangling substation was struck by lightning and tripped, causing the power failure of the traction station of Taizhou Electric Railway; etc.

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