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A method and system for analyzing power grid transient stability energy function with detailed generator model

A technology for grid transient stability and generator model, which is applied in electrical digital data processing, special data processing applications, instruments, etc. It can solve problems such as low reliability and simple model, and achieve the effect of improving reliability and accurate calculation.

Active Publication Date: 2018-08-07
STATE GRID CORP OF CHINA +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a power grid transient stability energy function analysis method and system with a detailed generator model for the defects of the existing energy function method analysis software that the model is too simple and the reliability of the power system safety analysis is not high.

Method used

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  • A method and system for analyzing power grid transient stability energy function with detailed generator model
  • A method and system for analyzing power grid transient stability energy function with detailed generator model
  • A method and system for analyzing power grid transient stability energy function with detailed generator model

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Embodiment 1

[0053] see figure 1 , a power grid transient stability energy function analysis method with a detailed generator model, including the following steps:

[0054] 10. Input the network information before the fault, dynamic parameters of the generator and fault conditions, and establish a power system model including a detailed generator model.

[0055] Specifically, in the step 10: the network information before the failure includes generator active and reactive output, load active power and reactive power, network element parameters and network topology, and all node voltage amplitudes and phases; generator dynamics The parameters include synchronous machine parameters and excitation regulator parameters; the power system model including the detailed generator model is: the synchronous machine adopts a high-order model with an order > 2, and the excitation regulator is equivalent to the output limit through the noise bandwidth equivalent method The first-order inertia link of t...

Embodiment 2

[0096] A power grid transient stability energy function analysis system with a detailed generator model, including the following parts:

[0097] The input and modeling device is used to input network information, generator dynamic parameters and fault conditions, and is used to establish a power system model including a detailed generator model;

[0098] a failure mode selection device for determining the failure mode;

[0099] A corner point CRN calculation device, used to calculate the corner point CRN;

[0100] Generator equivalent parameter calculation device, used for calculating generator equivalent parameters;

[0101] Accurate dominant unstable equilibrium point CUEP solver, used to solve accurate dominant unstable equilibrium point CUEP;

[0102] The energy margin calculating device is used to calculate the energy margin according to the difference between the CUEP and the system energy at the moment of fault clearing.

[0103] see figure 2 , verify the validity ...

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Abstract

The present invention discloses a power grid transient stability energy function analysis method and system containing a detailed generator model. The method comprises the following steps of: establishing a power system model containing the detailed generator model; determining a failure mode; calculating an angular point CRN; calculating a generator equivalent parameter; solving an accurate controlling unstable equilibrium point (CUEP); and calculating an energy margin according to a system energy difference value of the CUEP and a failure clearing moment. The system comprises apparatuses used for implementing the method. The problem of a relatively large deviation between a transient stability analysis result and an actual situation, caused by a too simplified model in an existing energy function method entering a practical stage, is solved, so that the reliability of power system security analysis can be improved.

Description

technical field [0001] The invention relates to an energy function analysis method, more specifically to a power grid transient stability energy function analysis method and system including a detailed generator model, and belongs to the technical field of power system transient stability analysis and control. Background technique [0002] Power grid transient stability is one of the main problems affecting the safe and stable operation of the power grid. The continuous interconnection of regional power grids, the gradual implementation of power market policies, and the integration of more and more intermittent new energy sources make the dynamic characteristics of the power grid more complex. The operation of the power grid is getting closer to its stability limit, and the transient stability of the power grid is more destructive. ; Therefore, according to the real-time state of the power grid, fast and accurate online quantitative evaluation of transient stability is the b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCY02E60/00
Inventor 潘晓杰孙海顺王莹党杰奚江惠张顺邵德军刘兵
Owner STATE GRID CORP OF CHINA
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