DU Hui,LIN Tao,CHEN Rusi,et al.Fast Construction Method of Active Power Steady-state Security Region Considering Variation of Structural Parameter in Power Grid[J].Automation of Electric Power Systems,2020,44(8):108-115.
DU Hui,LIN Tao,CHEN Rusi,et al.Fast Construction Method of Active Power Steady-state Security Region Considering Variation of Structural Parameter in Power Grid[J].Automation of Electric Power Systems,2020,44(8):108-115. DOI: 10.7500/AEPS20190709007.
Fast Construction Method of Active Power Steady-state Security Region Considering Variation of Structural Parameter in Power Grid
Active power steady-state security region (APSSR) represents feasible region of injection power for safe and stable operation with the given power grid structure
which is conducive to online security assessment and preventive control. With connecting flexible alternative current transmission devices such as thyristor controlled series compensations (TCSCs) and unified power flow controllers (UPFCs)
structural parameters in power grid is becoming continuously adjustable. The construction method of traditional APSSR is obtained based on the fixed structural parameters. Calculation speed is limited by inversion of operation high-dimensional parametric matrix when the structural parameters are frequently adjusted and hard to satisfy the demand of online applications. For the above problems
the research is carried out with TSCS as an example
the influence of structural parameter variation in power grid on power flow distribution is transferred into modifying the bus injection power
and explicit expression of hyperplane boundary coefficient matrix for APSSR is constructed considering structural parameters in the power grid
which provides an available idea for fast construction of APSSR and online application. Furthermore
the instructional role of safety margin assessment in two aspects such as preventive control of power system and structural parameter optimization is analyzed. Finally
based on IEEE cases with different grid scales and TCSC quantities
the effectiveness of proposed method and superiority in computational efficiency are verified
the application value is further illustrated by an example of 500 kV transmission line in provincial grid.
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