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Evaluation method for static voltage stability of the power system based on the dynamic continuous tide

A static voltage stabilization and power system technology, applied in the direction of AC network voltage adjustment, AC network circuits, electrical components, etc., can solve the problem that the calculation result depends on the selection of balance nodes, and achieve the effect of improving accuracy

Inactive Publication Date: 2009-02-11
TSINGHUA UNIV
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Problems solved by technology

[0032] The purpose of the present invention is to propose a dynamic continuous power flow (Dynamic Continuation Power Flow, hereinafter referred to as DCPF) static voltage stability evaluation method of the power system, automatically and rationally distribute the unbalanced power in the power system on the generators of the whole network, so as to Solve the problem that the results of conventional continuous power flow calculations depend on the selection of balance nodes

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  • Evaluation method for static voltage stability of the power system based on the dynamic continuous tide
  • Evaluation method for static voltage stability of the power system based on the dynamic continuous tide
  • Evaluation method for static voltage stability of the power system based on the dynamic continuous tide

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Embodiment Construction

[0049] The evaluation method of the static voltage stability of the power system based on the dynamic continuous power flow proposed by the present invention first constructs the dynamic active power flow equation of the power system as P Gi -β i ΔP ∑ -P Di -P i (U, θ) = 0,

[0050] Among them, i=1, 2, ..., N, P Gi ,P Di are the current active power generation output power and active load on the power system node i, respectively, β i is the unbalanced power share shared by the generator on the power system node i, if the node i is not connected to the generator, or the output power of the generator at the node is not adjustable, then β i =0,β i Satisfy Σ i = 1 N β i = 1 , U is the amplitude of the node voltage of the power system, and θ is the phase angle of the node voltage;

[0051] According to the dy...

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Abstract

The invention relates to a evaluation method of electrical power system static state voltage steady which is based on the dynamic continual tidal current, belongs to the electric power system movement and control technogy area. This invention method had considered the net cess not counterbalance on the entire net generator assignment in the existing electrical power system continual tidal current equation, through solve the dynamic continual tidal current equation, reasonably assigns not balanced power, solved the question of the conventional continual tidal current computed result rely on the balance pitch point choice, enhanced the electrical power system quiescent voltage stable appraisal accuracy.

Description

technical field [0001] The invention relates to a static voltage stability evaluation method of a power system based on a dynamic continuous power flow, and belongs to the technical field of power system operation and control. Background technique [0002] Static voltage stability analysis is an important function in the automatic voltage control system (AVC) and energy management system (EMS) of the power grid, and it is of great significance to the safe operation of the power grid. Continuation Power Flow (CPF, Continuation Power Flow) is a basic analysis method in static voltage stability analysis of power system. Due to the introduction of extended parameter equations, the continuum power flow method makes its Jacobian matrix non-singular at the saddle-node bifurcation point of the original power flow equation, thus overcoming the shortcoming that the ordinary power flow equation does not converge near the saddle-node bifurcation point. According to the different extend...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00H02J3/12H02J3/46
Inventor 孙宏斌李钦张伯明吴文传郭庆来
Owner TSINGHUA UNIV
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