Incorporated series connection resonance inductor voltage-dividing high-voltage measurement system

Abstract

The invention relates to an integrated series resonant inductance voltage dividing high-voltage measurement system, comprising a resonant inductance with a voltage dividing tap, an excitation transformer with a primary side and a secondary side, a first measurement module for measuring the voltage at both ends of the resonant inductance, and a first measurement module for measuring The second measuring module for the voltage across the secondary side of the excitation transformer, an intelligent measuring instrument that is connected to the first measuring module and the second measuring module and sums the voltage across the resonant inductance and the voltage across the secondary side of the excitation transformer, and the excitation transformer The secondary side is connected in series with the resonant inductor and then connected in parallel to both ends of the tested product to form a series resonant test circuit. The present invention utilizes the own reactor of the resonant system, and designs it through the method of voltage dividing taps to make it a resonant reactor with the function of measuring pressure, cancels the AC high-voltage divider configured in the conventional resonant system, and saves investment cost and operating cost , to reduce the loading and unloading workload, especially for ultra-high voltage and ultra-high voltage AC withstand voltage test equipment is of great significance.

Description

technical field [0001] The invention belongs to the field of electrical testing equipment, and in particular relates to an integrated series resonance inductance voltage dividing high-voltage measuring system. Background technique [0002] Resonance is a common phenomenon in power system applications, and it is widely used, especially in high-voltage AC withstand voltage tests. The high-voltage test resonant circuit circuit is composed of a resonant inductor and a resonant capacitor. According to the connection mode of the inductor and capacitor, it is divided into series, parallel and series-parallel resonance. The high-voltage AC withstand voltage test usually uses a series resonant circuit for testing. [0003] In addition to the resonant inductance and resonant capacitor, the resonance test circuit is composed of frequency modulation power supply for excitation, excitation transformer for isolation pre-boost, AC voltage divider for high voltage measurement and measuring ...

AI Technical Summary

Problems solved by technology

[0007] 1. Since the slenderness ratio of the voltage divider can reach more than 30 and the height can reach more than ten meters, a pressure equalizing ring with a diameter of four meters needs to be installed on the top of the voltage divider due to pressure equalization requirements. After the on-site construction is completed, its center of gravity is very high. As a result, its stability is extremely poor, especially in sites with poor weather conditions, the wind resistance performance is also extremely poor, and there is a risk of lodging, which is a major hidden danger in high-voltage tests;

[0008] 2. The geometric size distribution of the voltage divider is extremely uneven, with high height and small outer diameter, forming a thin and tall cylinder. Due to the high height, it needs to be designed in sections, and each part needs to be equipped with a separate box for storage and transportation

Therefore, it needs to be disassembled every time it is transported, and it needs to be built in series when it is built on site, which is extremely inefficient;

[0009] 3. The voltage divider is composed of multi-stage precision capacitors or resistance-capacitance in series, and its cost is very high, and it is also a relatively high-cost component in the entire system;

[0010] 4. The pressure divider is a multi-section oil-filled sealing body, and there is a hidden danger of leakage due to seal damage;

[0011] 5. The voltage divider is a precision measuring instrument, which puts forward higher requirements for storage and transportation, and there is a hidden danger of failure of the voltage divider due to improper storage and transportation.

[0012] In short, the original resonant system, no matter whether the single column of the voltage divider is connected in parallel next to the tested product, or the structure of the voltage divider and the resonant inductor is designed as a common tower structure, as long as it involves high voltage measurement, the voltage division Devices are essential, resulting in a decrease in test efficiency, a corresponding increase in cost, and a corresponding increase in test risk

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