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ipfc topology and its steady-state modeling method for power flow control of parallel double-circuit lines

A power flow control, double-circuit technology, applied in circuit devices, AC network circuits, AC networks with the same frequency from different sources, etc.

Inactive Publication Date: 2021-05-14
SOUTHEAST UNIV +2
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  • Application Information

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Problems solved by technology

Therefore, the dual-circuit line where the auxiliary control line adopts the traditional IPFC topology will generate circulating currents, which will have a negative impact on the economical and effective operation of the line and cause potential safety hazards

Method used

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  • ipfc topology and its steady-state modeling method for power flow control of parallel double-circuit lines
  • ipfc topology and its steady-state modeling method for power flow control of parallel double-circuit lines
  • ipfc topology and its steady-state modeling method for power flow control of parallel double-circuit lines

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specific Embodiment approach

[0023] Firstly, the derivation formula illustrates the reasons why the IPFC topology proposed by the present invention can effectively avoid the circulation of parallel double-circuit lines compared with the traditional IPFC topology and its superiority.

[0024] as attached image 3 shown in: V i ∠θ i is the i-node voltage and phase angle at the head end of the line, V j ∠θ j is the voltage amplitude and phase angle of node j, V k ∠θ k K node voltage amplitude and phase angle, V seij ∠θ seij The amplitude and phase angle of the equivalent output voltage of the main control line series converter, V seik ∠θ seik is the amplitude and phase angle of the equivalent output voltage of the series converter of the auxiliary control line, is the current vector between nodes i and j, is the current vector between nodes i and k, P ij +jQ ij is the active and reactive power flowing between nodes i and j, P ik +jQ ik is the active and reactive power flowing between nodes i ...

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Abstract

The present invention proposes a novel line-to-line power flow controller topology and its steady-state modeling method suitable for power flow control of parallel double-circuit lines. The line active power command value is adopted in the parallel double-circuit main control line P ref1 and reactive power command value Q ref1 As the control target, the active power command value of the line is adopted in the parallel double-circuit auxiliary control line P ref2 As the control target, the flexible control of the power flow of the main control line and the active power of the auxiliary control line is realized. When the IPFC equipment controls the power flow of the line, the reactive power of the auxiliary control line is uncontrollable, which may easily cause the circulation problem of the parallel double-circuit auxiliary control line. The topology proposed by the present invention uses the IPFC cross topology connection method to decouple the DC side between the parallel double-circuit main control line and the parallel double-circuit auxiliary control line, which can effectively avoid the circulation problem of the auxiliary control line in the traditional IPFC topology , realize stable and effective power flow control of parallel double-circuit lines, and ensure safe and effective operation of the power grid.

Description

technical field [0001] The invention relates to the technical field of power system stability and control, in particular to an IPFC topology and a steady-state modeling method suitable for power flow control of parallel double-circuit lines. 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 device. 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 character...

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 吴熙王亮陈曦刘玙陶加贵徐晓轶陈轩
Owner SOUTHEAST UNIV
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