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Power distribution system load obscurity model building device and method

A technology of fuzzy modeling and power distribution system, which can be used in circuit devices, general control systems, control/regulation systems, etc., and can solve problems such as high computational cost.

Inactive Publication Date: 2008-07-30
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Has a good theoretical guarantee, but the calculation is expensive, and what may be obtained is a local minimum of the loss function

Method used

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  • Power distribution system load obscurity model building device and method
  • Power distribution system load obscurity model building device and method
  • Power distribution system load obscurity model building device and method

Examples

Experimental program
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Embodiment

[0217] Take a 10KV distribution system of Tongliao power grid as an example. Through hardware, 160 sets of data of peak and valley load fluctuations of nodes under normal conditions of the distribution network line and 40 sets of short-circuit fault data such as two-phase short-circuit, three-phase short-circuit, and two-phase-to-ground short-circuit at different nodes were collected. Through the power flow calculation of the distribution network, the voltage and active and reactive power distribution of the whole network under the condition of these 200 sets of data are obtained. The 50 sets of data (30 sets of normal operation data and 20 sets of fault data) are used as the basic data to form two types of basic two-dimensional data of 50 sets each, that is, the two-dimensional data corresponding to the voltage of each node and the active power and the voltage and Two-dimensional data corresponding to reactive power. First, according to the distribution of the data, the data...

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Abstract

The invention relates to a load fuzzy modeling device and a method of power distribution system. The device comprises a lower computer and an upper computer consisting of a sensor, a signal conditioning and filtering module, an A / D conversion module, a DSP module, a memory module, a display and keyboard operation module and a communication module, wherein the upper computer is connected with the communication module; a voltage transformer and a current transformer are used for collecting the voltage and the current of the system and inputting the voltage and the current into a voltage and a current signal conditioning circuit; the voltage amplified by an amplifier is inputted into the A / D conversion module for sampling; and the digital signal is transmitted to the DSP for processing to obtain the final result, which is transmitted to the upper computer by the communication module. The method is characterized in that a data making-up method of a novel combined cloud data generator and fuzzy modeling are combined, a normal cloud generator is restricted by constraint equations and effectively combined with a backward cloud generator to reproduce the specific apparent distribution of an observed object, and the improved T-S fuzzy modeling method is adopted according to the characteristics of load modeling.

Description

Technical field: [0001] The invention belongs to the technical field of power system load modeling, and in particular relates to a fuzzy modeling device and method for power distribution system load based on a combined cloud generator and an improved T-S fuzzy model. Background technique: [0002] The load model has a certain influence on the transient stability, voltage stability and small-signal power angle stability of the power system. Accurate load model is of great significance for power system analysis. The main problems existing in the load modeling technology of the existing power distribution system are the insufficient and inaccurate basic data caused by outdated monitoring, control and protection methods, and the existence of a large number of random and fuzzy phenomena in the load fluctuation, resulting in the inability to identify the results. Accurately approximate the actual load characteristics. [0003] Load modeling methods are generally divided into stat...

Claims

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Application Information

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IPC IPC(8): H02J3/00G06F17/00
CPCG06N7/04G05B17/02G05B13/0275
Inventor 张化光王占山孙秋野杨东升王云爽梁志珊张铁岩宋武琪
Owner NORTHEASTERN UNIV
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