A Pulse High Voltage Measurement Platform Based on Voltage-to-Frequency Conversion Technology

Abstract

The invention discloses a pulse high-voltage measuring platform based on a voltage frequency conversion technology. The measuring platform is composed of a voltage dividing module, a signal conditioning module, a voltage-to-frequency conversion module, an electro-optical conversion module, a photoelectric conversion module, a frequency counting module, a frequency-to-voltage conversion module and a display storage module connected in order. The platform uses fiber transmission and is suitable for long-distance occasions and occasions with higher requirements for anti-interference performance; an FPGA is used to realize frequency to voltage conversion, the operation speed is high, time delay of the system is low; and a measuring range conversion function is added to the signal conditioning circuit, the output power after voltage-to-frequency conversion within the measuring range is increased, and the transmission time delay and the precision index within the measuring range are ensured. The pulse high-voltage measuring platform is high in measuring precision, low in time delay and high in anti-electromagnetic-interference capability, and solves the problem that the instantaneity in the prior art is not high; and the platform can be combined with a module to carry out spectrum analysis and filtering on the pulse voltage, and has significant application prospects.

Description

technical field [0001] The invention belongs to the field of DC high-voltage measurement and isolation transmission, and more specifically relates to the design of a pulsed DC high-voltage measurement platform based on voltage-frequency conversion technology. Background technique [0002] In the field of controlled nuclear fusion, in order to further improve the test parameters, auxiliary heating means (such as electron cyclone heating) must be used to further heat the plasma to reach the ignition temperature. Pulse DC high-voltage power supply is an important component of the auxiliary heating system, and the stability and safety of its operation are particularly critical to the entire auxiliary heating system. In order to realize feedback control and remote monitoring and protection of pulsed DC high-voltage power supply, it is necessary to measure and transmit its output voltage so that the controller can collect, display and control it. Since the high-voltage pulse powe...

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Problems solved by technology

[0004] Aiming at the problems existing in the existing technology, combined with the requirements of the actual application environment, the present invention provides a design scheme of a pulsed high-voltage measurement platform, which aims to quickly and accurately measure the pulsed direct current with fast leading edge and high amplitude in the environment of strong electromagnetic interference The power supply outputs a high-voltage waveform and transmits it to the controller in isolation to solve the problem that the transmission delay caused by capacitance integration and low-pass filtering in the prior art during the frequency-voltage conversion process makes the whole system poor in real-time performance and cannot meet the control and protection requirements. technical problem

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