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3-order normal form low-interference analysis method of SVC (Static Var Compensator) and TCSC (Thyristor Controlled Series Compensator) embedded system

An analytical method, a normative technique, applied in the field of power systems

Active Publication Date: 2012-07-04
STATE GRID HENAN ELECTRIC POWER +1
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Problems solved by technology

Because the linearization theory is difficult to describe the dynamic characteristics of the complex system caused by the nonlinear nature of the system, it is greatly limited in analyzing the mechanism of small disturbance oscillations from the nonlinear structural characteristics inside the system

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  • 3-order normal form low-interference analysis method of SVC (Static Var Compensator) and TCSC (Thyristor Controlled Series Compensator) embedded system
  • 3-order normal form low-interference analysis method of SVC (Static Var Compensator) and TCSC (Thyristor Controlled Series Compensator) embedded system
  • 3-order normal form low-interference analysis method of SVC (Static Var Compensator) and TCSC (Thyristor Controlled Series Compensator) embedded system

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Embodiment Construction

[0083] Such as figure 1 As shown, the present invention provides a system 3rd-order canonical form small disturbance analysis method embedded in SVC and TCSC, which is characterized in that it can quantitatively evaluate the degree of interaction between TCSC and SVC, and its third-order analytical solution is of great importance to the study of system dynamic performance. significance. The method includes the following steps:

[0084] Step A: Set the gain coefficients of SVC and TCSC, and obtain the initial power flow calculation results through the power flow calculation program, and obtain the initial solution of the derived state equation.

[0085] Step B: shrink to the electrical network equation to deduce the state equation, and obtain the system state equation group.

[0086] Step C: According to step B, according to the state equation of the dynamical system, the Jacobian sign matrix, the Hessian sign matrix and the third-order sign matrix are obtained.

[0087] Ste...

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Abstract

The invention provides a 3-order normal form low-interference analysis method of an SVC (Static Var Compensator) and TCSC (Thyristor Controlled Series Compensator) embedded system, is used for oscillation analysis of a power system comprising SVCs and TCSC, and provides a numerical analysis method for parameter arrangement of coexisting SVC and TCSC. In the method, the 3-order analytical solution form of a normal form of a TCSC and SVC embedded model are deduced, the solving calculation method is researched, and then aiming at 1, 2, and 3-order analytical solution information obtained based on the algorithm, SVC and TCSC gain parameters are adjusted and set so as to reduce the system damping analysis. Experiment results prove that: as compared with 1-order and 2-order analytic solutions, the 3-order analytic solution not only has better coincidence degree with a system nonlinear time domain imitation method, but also can provide more reciprocal influence information under the condition of positive mode interaction, so as to quickly and reasonably search appropriate SVC and TCSC gain parameters.

Description

technical field [0001] The invention belongs to the field of electric power systems, and in particular relates to a method for analyzing small disturbances in the third-order normative form of a system embedded with SVC and TCSC. Background technique [0002] With the gradual deepening and promotion of flexible alternating current transmission (FACTS) technology theory and engineering applications, the ability of FACTS devices to greatly improve the power transmission level of lines and improve the stability of power systems has gradually been reflected. However, with the increasing number of FACTS devices installed in the power system, the interactive influence among multiple FACTS controllers and their coordination design issues have received more and more attention. For this reason, many literatures have studied the coordinated control of systems embedded with multiple types of FACTS. Based on the linearization model among the existing multiple FACTS controllers, through...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
CPCC08G2101/0025C08J2205/10C08G2101/005C08J2375/04B29C44/38C08G2330/00B29C44/3403B29C44/42C08J9/12C08J2201/028C08G18/14
Inventor 张晓华汤涌孟远景刘跃新李柏青孙华东牛元立熊浩清易俊曾兵孙建华王景钢
Owner STATE GRID HENAN ELECTRIC POWER
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