IPFC model taking injection power as variable and load flow calculation method thereof

Abstract

The invention discloses an IPFC model taking injection power as a variable and a load flow calculation method thereof. The method specifically comprises the steps: directly taking the injection poweras the variable, enabling the injection power to be equivalent to the influence of IPFC on a controlled line, enabling the model not to relate to an injection voltage variable of an IPFC converter through mathematical deformation, and building a novel IPFC model. On the basis, the IPFC injection power is directly used as a state variable of the IPFC in the load flow calculation process, an IPFC load flow calculation iterative update equation with line power as a control target is constructed, and a target difference value and a system state quantity are controlled according to each iteration.The IPFC model provided by the invention has the advantages of simple modeling, good model convergence and high convergence precision. According to the load flow calculation method of the IPFC model,load flow calculation of a large power grid containing the IPFC can be rapidly and accurately achieved, and an application value and a control potential of the IPFC in an actual power grid can be mined.

Description

technical field [0001] The invention relates to the technical field of power system operation analysis and simulation, in particular to an IPFC model with injected power as a variable and a power flow calculation method thereof. Background technique [0002] Interline Power Flow Controller (IPFC) is a typical representative of the third-generation FACTS device. As its main function, IPFC can realize the precise regulation of power flow of multiple lines, and IPFC can flexibly control the active and reactive power of the power system. Power, voltage, impedance and power angle, the control effect is remarkable. At the same time, the power flow controlled by IPFC has the characteristics of directional and quantitative, which can "transfer" the power flow of heavy-loaded lines to adjacent light-loaded lines, reducing the impact on other lines. In summary, IPFC can flexibly control the active power, reactive power, voltage, impedance and power angle of the power system. IPFC has...

AI Technical Summary

Problems solved by technology

The inventor found through investigation that the current research on power system power flow calculation with IPFC has the following deficiencies: while the existing IPFC model, such as the IPFC model based on the traditional power injection method, often ignores line resistance, admittance, and equivalent series coupling transformers. The impact of impedance can easily cause the problem of difficult convergence of power flow

However, if the line impedance and admittance are taken into account, the built model is very complicated, and the calculation time of a single power flow is long, which is difficult to apply to the subsequent iterative calculation of power flow optimization

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