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Air conditioner load modeling method based on least squares parameter identification

A technique of least squares and air-conditioning load, which is applied to load forecasting in AC networks, AC network circuits, electrical components, etc., and can solve problems such as uneasy load characteristics

Inactive Publication Date: 2015-06-10
STATE GRID CORP OF CHINA +1
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Problems solved by technology

This method does not rely on the user's statistical data and reflects the time-varying nature of the load. The disadvantage is that it is not easy to obtain the load characteristics under a wide range of voltage and frequency changes.

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  • Air conditioner load modeling method based on least squares parameter identification
  • Air conditioner load modeling method based on least squares parameter identification
  • Air conditioner load modeling method based on least squares parameter identification

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Embodiment Construction

[0099] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings and through specific embodiments.

[0100] The working principle of the steady-state constrained weighted least squares method for estimating the parameter model is as follows figure 2 shown.

[0101] The figure includes three main parts: the actual system to be identified, the system model and the least square parameter estimator, among which the system model and parameter estimator are realized by computer software. The disturbance signal is input into the actual system model at the same time. First, the unknown parameters in the model are set to initial values. Under the action of the input, the system is measured online, the model is simulated and calculated, and the corresponding outputs between them are compared. The minimum The square method minimizes the sum of the squares of the errors, thereby obtaining the corrected value of the pa...

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Abstract

An air conditioner load modeling method based on least squares parameter identification is characterized in that air conditioner load is simulated by equivalent static load and equivalent dynamic load, a non-linear state equation is used to describe the equivalent mechanism model of the compressive load of the air conditioner load; and the steady state constraint condition of the air conditioner load is set and added into a weighing matrix for calculation; the working principle of the load modeling method based on the steady state constraint weighing least squares parameter identification, and corresponding detailed parameter identification steps which can be implemented by a computer are provided. The method has the advantages that a precise air conditioner load model can be provided, simulation results approximate to actual situations can be acquired, influence of the air conditioner load to a power grid can be identified favorably, and searching of methods for reducing air conditioner load damage is helped; the situation that no air conditioner load modeling exits is changed, the defects that the air conditioner load model cannot consider both steady state and transient state, and air conditioner load model accuracy is increased.

Description

technical field [0001] The invention relates to an air-conditioning load modeling method, in particular to a load modeling method based on steady-state constraint weighted least square method identification, and belongs to the technical field of power system load modeling. Background technique [0002] Many power system load models of the power system have a great influence on the calculation results of the power system stability, and also have a certain influence on the power flow calculation, short circuit calculation, and safety analysis. In borderline cases, it is also possible to change qualitative conclusions or cover up some important phenomena. Therefore, establishing an accurate model is of great significance for system simulation. [0003] In summary, the power system load modeling methods have the following categories: (1) statistical synthesis method; (2) overall measurement and identification method; (3) comprehensive measurement and identification method. [...

Claims

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Application Information

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IPC IPC(8): H02J3/00
CPCH02J3/00H02J3/003H02J2203/20
Inventor 郭亮孙旻熊华强
Owner STATE GRID CORP OF CHINA
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