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Studies on Static Equivalent of Power System and Its Evaluation Method

Author: LiuDuoDuo
Tutor: YangZhiQiang
School: Shandong University
Course: Circuits and Systems
Keywords: Static Equivalence Power balance Voltage stability Transient Stability Short-circuit current
CLC: TM712
Type: Master's thesis
Year: 2010
Downloads: 147
Quote: 1
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Abstract


Now the emergence of joint power system , grid interconnection formation of large power grid , the calculation becomes very complicated power system planning and design calculations and run . The control and management of the power system is hierarchical distribution run , so we only care about power system analysis and calculation are often part ( internal system ) to study its offline and online analysis , but the operation of the external system also have important implications in the analysis of the internal systems , so the need for an external system equivalents , a reasonable model can be used to directly simulate the whole network model . Analyze it calculated the same as the original model or very similar , in order to shrink the size of the system , making the interconnection grid analysis calculation becomes simple . Equivalent model of the reasonableness of a direct impact on the power grid analysis software calculated results . Herein is the static equivalents Ward equating methods . The basic Ward equivalents have been widely used to analyze the study of basic Ward equivalents come there are different issues for different network prototype equivalents method , several evolution based on the analysis of the basic Ward equivalent Ward equivalents improved method . At home and abroad have been a variety of algorithms to calculate external equivalents , we know the equivalent method of offline and online analysis of the power system have important , therefore equivalent in effect to evaluate an equivalent method , proposed a further research and development of the merits of the standard kinds of evaluation equivalent method for equating methods outside the network and how we choose equating methods corresponding equivalents analysis is a very valuable thing . In this paper, the equivalent evaluated from four aspects : power balance analysis , voltage stability analysis , transient stability analysis and short-circuit current . The calculation procedure is used herein , can be easily obtained based on the result of the calculation by the calculation engine trend development analysis results . This article uses the basic Ward equivalents method to establish extranet static equivalent model , to conduct applied research on the Shandong grid network and data . And in accordance with the above four aspects of the whole network and the equivalent network calculation and analysis, comparative evaluation of the equivalent model of rationality .

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Theory and Analysis > Power system stabilizer
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