Compatibility analysis method and device for sensitive equipment and grid voltage sag
A technology for sensitive equipment and grid voltage, applied in the field of grid analysis, which can solve problems such as large errors
Active Publication Date: 2021-02-02
GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD
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Problems solved by technology
[0005] Based on this, it is necessary to provide a compatibility analysis method and device for sensitive equipment and grid voltage sags for the problem of large errors in traditional compatibility analysis methods
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[0084] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. A preferred embodiment of the invention is shown in the drawings. However, the present invention can be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present invention will be thorough and complete.
[0085] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to and integrally integrated with the other element, or there may be an intervening element at the same time. The terms "mounted", "one end", "the other end" and similar expressions are used herein for the purpose of description only.
[0086] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of or...
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The invention relates to a method and device for analyzing compatibility with grid voltage sag by a sensitive device. The method comprises: according to a tolerance curve of a sensitive device, faultsample data in an uncertain area of the sensitive device are generated; sampling sample data are obtained from the fault sample data in the uncertain area of the sensitive device according to a presetrule and the sampling sample data are fitted to obtain data fitting points; according to a pre-established device-side fault probability function and a pre-established grid-side probability density function, a comprehensive fault probability function of the sensitive device in the uncertain area is obtained; on the basis of the data fitting point and the comprehensive fault probability function of the sensitive device in the uncertain area, the compatibility probability of the sensitive device in the uncertain area is obtained. According to the invention, the tolerance characteristics of thesensitive device are accurately described by analyzing the compatibility probability of the tolerance curve of the device in the uncertain area; and the tolerance characteristics conform to the actualsituation well, so that the evaluation accuracy is improved substantially.
Description
technical field [0001] The invention relates to the field of power grid analysis, in particular to a method and device for analyzing the compatibility between sensitive equipment and power grid voltage sag. Background technique [0002] In recent years, with the large-scale application of digital automatic control technology and the rapid development of new energy technology industry, more and more equipment sensitive to power supply voltage are continuously connected to the power grid. These sensitive equipment include computers (PCs), frequency conversion Speed governor (ASD), programmable logic controller (PLC), photovoltaic inverter and AC contactor, etc. Voltage sag can cause computer blue screen, power trip, and then lose data; cause the DC voltage of the frequency converter to drop, trigger low voltage or overcurrent protection, and then interrupt the production process; cause programmable logic controller command disorder or even shutdown; cause Photovoltaic inver...
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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0639G06Q50/06
Inventor 马智远莫文雄许中王勇周凯栾乐王红斌林金洪叶志峰张群峰钟锦群邱智民程振华梁旭懿
Owner GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD