An online measurement and control device for reducing the risk of DC commutation failure
A measurement and control device, a technology for commutation failure, applied in harmonic reduction devices, circuit devices, and AC networks to reduce harmonics/ripples, etc. The effect of protecting electrical equipment and reducing investment in capacity expansion
Active Publication Date: 2017-07-14
STATE GRID CORP OF CHINA +3
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Problems solved by technology
At present, the research on the harmonic transfer characteristics and measurement error of capacitive voltage transformers is mainly in the stage of theoretical qualitative analysis, quantitative analysis combined with actual physical test research has not been carried out in depth, and there are no facilities and technologies that can be practically applied to the field
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[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0030] like figure 1 , the present invention provides an online measurement and control device for reducing the risk of DC commutation failure, characterized in that the device includes a system primary equipment group, an amplitude sensor group, a phase sensor group, a lower computer, an upper computer and a digital quantity processing system; the primary device group of the system is unidirectionally connected to the amplitude sensor group, and is connected to the phase sensor group through an electromagnetic field. The amplitude sensor and the phase sensor are respectively connected to the lower computer in one direction, and the lower computer and the upper computer Two-way connection, the upper computer and the system primary equipment group are respectively connected to the digital quantity processing system in two directions.
[0031] The system prima...
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The invention provides an online measurement and control device for reducing the risk of DC commutation failure. The device includes a system primary equipment group, an amplitude sensor group, a phase sensor group, a lower computer, an upper computer and a digital quantity processing system; the system The primary equipment group is connected to the amplitude sensor group in one direction, and is connected to the phase sensor group through an electromagnetic field. The amplitude sensor and the phase sensor are respectively connected to the lower computer in one direction, and the lower computer is connected to the upper computer in one direction. The upper computer and the primary equipment group of the system are respectively connected to the digital quantity processing system in two directions. Compared with the prior art, the invention has the advantages of convenient testing, high efficiency, accurate measurement of each harmonic below the 31st order, and an error of less than 0.2%.
Description
technical field [0001] The invention relates to an online measurement and control device, in particular to an online measurement and control device for reducing the risk of DC commutation failure. Background technique [0002] Capacitive voltage transformers have been developed for more than 40 years abroad, and are widely used in 72.5-800kV power systems. Since the domestic capacitive voltage transformer was born in Xi'an Power Capacitor Factory in 1964, it has also accumulated 35 years of manufacturing and operating experience, and has now entered a mature stage. Especially in recent years, domestic capacitive voltage transformers have made breakthroughs in the improvement of accuracy and output capacity, and the successful use of fast saturated reactance dampers to significantly improve the ferromagnetic resonance damping characteristics and transient response characteristics. . The majority of users in the power sector generally recognize that domestic capacitive volta...
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IPC IPC(8): H02J3/01H02J3/18H02J13/00
CPCY02E40/30Y04S10/22Y04S40/128Y02E40/70Y02E60/00Y02E40/40
Inventor 王轩付永生燕翚王宇红刘平竹桂峻峰胡小刚夏明超
Owner STATE GRID CORP OF CHINA