Continuation power flow algorithm considering field current constraint and armature current constraint of power generator

A technology of excitation current and armature current, applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve problems such as deviation
CN102593820BActive Publication Date: 2014-01-22HOHAI UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HOHAI UNIV
Publication Date
2014-01-22

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Abstract

The invention discloses a continuation power flow algorithm considering field current constraint and armature current constraint of a power generator, which belongs to the technical field of electric power system stable analysis and control. Considering the influence of the field current constraint and the armature current constraint of the power generator on a reactive power output of the power generator, reactive output models under the maximal field current constrain and the maximal armature current constraint are respectively established, a Jacobian matrix is corrected in the continuation power flow calculation, power flow solution can be obtained through iteration, a pressure-volume (PV) curve is drawn, and more precise voltage stability margins can be obtained. In addition, the invention also provides a method for identifying a type of a static bifurcation point and key constraint conditions, so the type of the static bifurcation point and the key constraint condition causing the voltage failure can be identified, and the system prevention control validity can be improved.
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Description

technical field

[0001] The invention relates to a continuous power flow algorithm considering generator excitation current constraints and armature current constraints, and belongs to the technical field of power system stability analysis and control. Background technique

[0002] In the past 30 years, there have been many voltage collapse accidents in power systems at home and abroad, which makes the research on voltage stability problems arouse widespread attention in the world. Static voltage stability analysis is one of the important functions in automatic voltage control system (Automatic Voltage Control-AVC) and energy management system (Energy Management System-EMS), which plays an important role in the evaluation and early warning of power grid security operation. Since the continuation power flow algorithm (Continuation Power Flow-CPF) was proposed in the 1990s, it has developed into one of the main analysis methods in the static voltage stability analysis of power ...

Claims

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