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Method of polymerization of induction motor load dynamic parameter taking account of slip and load factor

An induction motor and dynamic parameter technology, which is applied in motor generator testing, electrical digital data processing, calculation, etc., can solve the problems of unreflected and difficult to induce dynamic characteristics of motor groups, and achieve the effect of ensuring aggregation accuracy.

Active Publication Date: 2008-10-08
TIANJIN UNIV +1
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Problems solved by technology

It is difficult to simulate the dynamic characteristics of the induction motor group by only using the capacity as the weight coefficient for aggregation because it does not reflect these important information at all.

Method used

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  • Method of polymerization of induction motor load dynamic parameter taking account of slip and load factor
  • Method of polymerization of induction motor load dynamic parameter taking account of slip and load factor
  • Method of polymerization of induction motor load dynamic parameter taking account of slip and load factor

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Embodiment Construction

[0015] The present invention will be described in detail below in conjunction with the accompanying drawings and examples.

[0016] figure 1 The steady-state equivalent circuit diagram of the induction motor is adopted for the present invention. The invention proposes a capacity weighting method that considers the load rate and the critical slip to realize induction motor parameter aggregation and provide a more accurate load model for power system transient stability simulation. by figure 2 The shown WSCC9 node system is an embodiment, and the details are as follows:

[0017] Step 1: Determine the network used for transient stability calculation of the power system, and collect network data and dynamic parameter data of generators and their regulating systems and loads from the power system energy management system;

[0018] For this embodiment, the data of the WSCC9 node system can be directly input. For the actual power system, it is necessary to connect to the EMS syst...

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Abstract

The invention relates to a method for aggregating power system induction motor load dynamic parameter, belonging to technical field of power system dynamic equivalent value and load modeling, the method is realized by capacity weighting method considering the load factor and the critical slip (maximum torque corresponding slip), the realized system comprises electric network data aquisition and induction motor group parameter aggregation. The obtained dynamic parameter of the power system induction motor load model is used for computing for transient state stable simulation. The detailed model parameter of the power system equivalent value induction motor load model obtained by the invention can not only improve precision of the parameter aggregation, but also can not increase computing load.

Description

technical field [0001] The invention relates to a dynamic parameter aggregation method of a load induction motor in a power system, and belongs to the technical field of dynamic equivalent sum and load modeling of the power system. Background technique [0002] Power system simulation calculation is the basis of power system planning, design and operation. Simulation results are often used as the basis for relevant decision-making. Therefore, the accuracy of simulation is getting more and more attention. Electric load is an important part of the power system, and the load model and parameters have a great influence on the simulation accuracy. The so-called load here refers to the whole viewed from the main grid to the load side, including the power supply and distribution system. Therefore, the induction motor load connected to the high-voltage (110kV or 220kV) load bus at this time represents the comprehensive load including the distribution network and a group of motors. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00G06F17/00G01R31/34
Inventor 余贻鑫黎鹏郭金川曾沅黄纯华
Owner TIANJIN UNIV
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