Adaptive recognition method for wide area power system load model

A load model and power system technology, applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve the problems of unable to reflect the full-time load characteristics, no adjustment model, no consideration of load time-varying, etc., to improve the practical value of the project , improve efficiency and accuracy, and reduce the effect of total calculation

Active Publication Date: 2016-09-28
NANJING UNIV OF TECH
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the time-varying nature of the load is not considered in the prior art, and the model is not adjusted with the change of the load itself, and the identified model cannot reflect the load characteristics of the whole period

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  • Adaptive recognition method for wide area power system load model
  • Adaptive recognition method for wide area power system load model
  • Adaptive recognition method for wide area power system load model

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Embodiment Construction

[0035] Such as Figure 1-3 As shown, the adaptive identification method of the wide-area power system load model provided by the present invention includes the following steps:

[0036] Step 1, the calculation of the load time-varying classification threshold, the specific steps are:

[0037] Step 1.1, set the sample period T for load feature collection s (such as one year) and the number of samples N in the sample period s , assuming that the system has n load nodes, the sth (s=1,2,…,N s ) times of sampling, the i-th (i=1,2,...,n) load node’s load power consumption ratio is obtained as X i,s =(x is1 ,x is2 ,x is3 ,x is4 ), where x is1 ,x is2 ,x is3 ,x is4 Respectively represent the proportion of electricity consumption of the i-th load in the s-th sampling of industry, commerce, agriculture and other loads;

[0038] Step 1.2, set the upper limit of the number of system load model resets within the sample period to N MSC , the kth classification threshold is ε k ...

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Abstract

The invention provides an adaptive recognition method for a wide area power system load model. The method comprises the steps of: calculation of a load time-variable classification threshold, reset start judgment of a load model, judgment on validity of the load model based on a system dominant oscillation mode recognition observation object, spatial classification of wide area power system loads and unified recognition of various loads of the system. The adaptive recognition method continuously monitors the load feature change, and if a load has great feature change, the load classes are uniformly recognized according to the proportional feature formed by the electrical property, and the load model of the simulation system is reset with the recognition result, so that the accuracy and the practical engineering value of the load model are improved, and then the security and the economical efficiency of the system are improved.

Description

technical field [0001] The invention relates to a load model identification method, in particular to an adaptive identification method for a wide-area power system load model. Background technique [0002] The accuracy of power system simulation results directly affects the reliability of system planning, design and operation. The inaccuracy of the system model is the key factor that causes the simulation results to be different from the actual operating conditions of the system. Through RTU information collection and redundancy analysis, a relatively accurate power system network topology model can be obtained; within the normal frequency operating range, the model parameters of static components such as lines, transformers, and capacitors are relatively reliable; through a large number of manufacturers' tests, independent Modeling and regular follow-up inspection, the model of the generator and its controller is relatively mature. However, the load, which is one of the i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20Y02E60/00
Inventor 郝丽丽戴嘉祺郝培华
Owner NANJING UNIV OF TECH
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