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On-line load simulation method of power system

A load simulation and power system technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve problems such as installation of related devices in substations, and achieve the effect of ensuring safety and improving accuracy

Active Publication Date: 2010-07-14
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology

The biggest difficulty of this method is that it is difficult to install relevant devices in all substations in the system. The second is to use the overall measurement and identification method to identify the parameters of the load model. The parameters have multiple solutions and uncertainties, and may not match the actual situation.

Method used

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  • On-line load simulation method of power system
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  • On-line load simulation method of power system

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Embodiment Construction

[0099] The basic idea of ​​the online statistical synthesis method is to first obtain the mathematical models of various typical load components (such as: fluorescent lamps, household electronic equipment, industrial motors, air-conditioning loads, etc.) through experiments and mathematical derivations, and then use the load control system of the power system marketing department to collect The user-side power information provided by the energy management system (EMS) and the substation online power information provided by the energy management system (EMS), combined with sampling manual survey statistics, count the composition of various loads at a certain time at some load points, that is, the percentage of each typical load, and The data of distribution lines, transformers and reactive power compensation, and finally integrate these data to obtain the load model of the load point.

[0100] The technical scheme of the present invention mainly includes four parts, that is, the...

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Abstract

The invention relates to an on-line load simulation method of a power system, belonging to the technical field of power system measurement. The method utilizes user side power information collected by a power system marketing department load control system and transformer substation power information provided by an energy management system (EMS), combines with sampling manual survey statistics, utilizes a load node power supply area network chart provided by a dispatching department as well as related data, such as transformer number, volume, reactive compensation volume, line impedance and the like of a 220 kV transformer substation and subordinate 110 kV and 35 kV transformer substations and adopts a statistics composite method to realize the on-line load modelling of the load node so as to accurately model the load node. The invention improves the simulative calculation accuracy of a power grid and ensures that the power grid can safely, reliably and economically operate.

Description

technical field [0001] The invention belongs to the technical field of power system measurement, and in particular relates to an online load simulation method of a power system. Background technique [0002] The mathematical model of each component of the power system is the basis of system analysis and calculation, and the accuracy of the analysis results depends on the quality of the model. Detailed mathematical models and modeling techniques for generators, excitation systems, speed control systems, transformers, and transmission lines in power system analysis have been well developed. But for a long time, the load as one of the important components of the power system has determined the difficulty of establishing its mathematical model due to its complexity, distribution, time-varying and randomness. [0003] Researchers have proposed many load simulation methods. The basic idea of ​​the statistical synthesis method is to first obtain the mathematical models of various...

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Application Information

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IPC IPC(8): H02J3/00
Inventor 汤涌王琦赵兵张文朝邱丽萍
Owner CHINA ELECTRIC POWER RES INST
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