A method to improve the convergence of ipfc power injection model in power flow calculation

A technology of power flow calculation and injection model, which is applied to AC networks with the same frequency from different sources, AC network circuits, circuit devices, etc., and can solve problems such as slow calculation speed, increased number of iterations, and reduced work efficiency of planning analysts

Inactive Publication Date: 2019-12-10
SOUTHEAST UNIV +2
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Problems solved by technology

However, the use of the power injection model in IPFC will lead to poor convergence of power flow calculations, a significant increase in the number of iterations, affecting the speed of calculation and analysis, and reducing the work efficiency of planning analysts. When running the power flow of the mode, the problem of slow calculation due to poor convergence caused by the power injection model will become more prominent

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  • A method to improve the convergence of ipfc power injection model in power flow calculation
  • A method to improve the convergence of ipfc power injection model in power flow calculation
  • A method to improve the convergence of ipfc power injection model in power flow calculation

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Embodiment Construction

[0037] The technical solution of the present invention will be further introduced below in combination with specific embodiments.

[0038] The structure of the IPFC adopted in this specific embodiment is as figure 1 shown. This specific embodiment discloses a method for improving the convergence of the IPFC power injection model in power flow calculation, such as image 3 shown, including the following steps:

[0039] S1: Initialize the power flow equation, set the number of iterations k to 1; set the IPFC control target value, and set the active power flow P of the main control line 1 control at P 1ref , the reactive power flow Q of the main control line 1 control in Q 1ref , the active power flow P of the auxiliary control line 2 control at P 2ref ; among them, P 1ref The control target of the active power flow of the main control line, Q 1ref The control target of the reactive power flow of the main control line, P 2ref is the control target of the active power fl...

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Abstract

The invention discloses a method for improving convergence of IPFC power injection model in power flow calculation, In the power flow calculation of power system with IPFC, PI control is introduced tosolve part of the power of IPFC injection system, and when the iterative error is reduced to a certain value but the power flow still does not reach the convergence condition, the parameters of PI controller are reset to reduce the iterative step length, so as to overcome the problem of convergence degradation caused by overshoot. The invention realizes that the convergence of the power flow calculation of the power network is greatly improved when the IPFC adopts the power injection model, and the work efficiency of the operation analyst can be improved.

Description

technical field [0001] The invention relates to the technical field of power system operation analysis and simulation, in particular to a method for improving the convergence of an IPFC power injection model in power flow calculation. Background technique [0002] The Interline Power Flow Controller (IPFC), like the Unified Power Flow Controller (UPFC), is a typical representative of the third-generation FACTS devices. Compared with UPFC, IPFC is a more comprehensive and powerful FACTS control device. On the one hand, it can not only directly control the power flow on the transmission line installed in the series part like UPFC, but also realize the power exchange between lines, thereby controlling the power flow between different lines; on the other hand, UPFC is controlling the power flow of its own installed lines Occasionally, it may cause the power flow of adjacent heavy-loaded lines to exceed the limit, and IPFC controls the power flow with directional characteristics...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/06
CPCH02J3/06H02J2203/20
Inventor 陈曦吴熙刘玙陶加贵徐晓轶陈轩
Owner SOUTHEAST UNIV
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