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Building method of motor load model

A technology of load model and construction method, which is applied in the direction of electrical components, circuit devices, AC network circuits, etc., and can solve problems such as the inability to accurately describe the frequency characteristics of dynamic loads

Active Publication Date: 2016-03-23
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies in the prior art above, the present invention provides a method for constructing a motor load model, which overcomes the shortcomings of traditional motor load model parameters that cannot accurately describe the dynamic load frequency characteristics, improves the reliability of power system simulation calculations, and provides The scientific planning and safe and stable operation of the power system provide a strong guarantee

Method used

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Examples

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Embodiment

[0113] Through the 220kV substation in the west of Wenzhou, Zhejiang (the wiring diagram is as follows figure 2 Shown) to conduct a detailed investigation, and statistical analysis and calculation of the survey data of the station, it can be determined that the types of equipment involved in the Chengxi 220kV substation and the proportion of each equipment type in the heavy load mode are shown in Table 1:

[0114] Table 1

[0115] serial number

load type

The proportion of this load type (%)

1

Industrial large motor

42.31

2

Industrial small motor

1.21

3

fluorescent light

12.84

4

sodium lamp

4.4

5

refrigeration air conditioner

5.44

6

water heater

7.72

7

color TV

7.01

8

refrigerator

3.99

9

washing machine

3.49

10

induction cooker

2.07

11

electric furnace

6.88

12

computer

2.64

...

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Abstract

The invention provides a building method of a motor load model. The method comprises the following steps: building the motor load model; carrying out accident simulating calculation on the motor load model; and determining frequency characteristic parameters of the motor load model. According to the building method of the motor load model provided by the invention, frequency parameters of various motor loads are accurately determined; and the method has great significance in improvement of the simulation precision and guarantee of the safety and the reliability of normal operation of a power grid. Torque-slip physical mechanism characteristics of motors are fully considered; the motor load model is good in convergence characteristics and high in robustness; the defect that a traditional load model cannot accurately describe load frequency characteristics of an asynchronous motor cluster is overcome; the simulating calculation reliability of a power system is improved; and a strong guarantee is provided for scientific planning and safe and stable operation of a power system.

Description

technical field [0001] The invention relates to power system simulation technology, in particular to a method for constructing a motor load model. Background technique [0002] With the improvement of the interconnection degree of the power system, the dynamic characteristics of the power grid under faults become more and more complex. A comprehensive understanding of its characteristics. Because on the one hand, the requirements of the power grid itself determine that it is impossible to conduct experiments in the actual power grid to study the stability of the system. It is possible to conduct research on the stability of the grid in real systems. In this case, simulation becomes an indispensable tool for power grid operation, planning and design. [0003] In the actual operation of the power system, the frequency dynamic process curve can be obtained through actual measurement, but sometimes there is a big difference between the system simulation results and the measur...

Claims

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Application Information

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IPC IPC(8): H02J3/00G06F17/50
CPCG06F30/367H02J3/00H02J2203/20
Inventor 王琦易俊赵兵汤涌刘丽平王建明张健郭强
Owner CHINA ELECTRIC POWER RES INST
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