Control processing method and device for optical fiber current transformer

Abstract

The embodiment of the present invention provides a control processing method and a device for an optical current transducer. After a controller of an optical current transducer system receives an input signal, according to the parameter setting and the performance index requirement of the optical current transducer, the feedback signal of the system is controlled to be optimized so as to optimize the state equation of the system to obtain the state variable of the system after the optimization calculation. Afterwards, subsequent processing is carried out for the state variable of the optimized system so as to obtain an output signal and a feedback signal of the system. By the optimizing processing carried out for the controller, the variation of the gain in a forward channel of the system is restrained, so that the system performance is not influenced by the variation of the gain in the forward channel of the system, and the frequency characteristics of the system are improved, thereby improving the system performance of the optical current transducer.

Description

technical field [0001] The invention relates to the field of optical fiber current transformers, in particular to a control processing method and device for optical fiber current transformers. Background technique [0002] With the development of current transformer technology, fiber optic current transformers have been used more and more. Because they use optical fibers as the medium for signal induction and transmission, they not only have good insulation performance, but are also less affected by electromagnetic interference, and their design The structure is simple, the volume is small, the weight is light, and the manufacturing cost is also low. At present, with the continuous expansion of its application range, the requirements for dynamic performance such as the dynamic range and frequency response range of optical fiber current transformers are also getting higher and higher, such as figure 1 Shown is a schematic structural diagram of closed-loop control detection i...

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Problems solved by technology

[0004] In practical applications, the optical power of the system, the gain of the detector and the gain of the pre-amplifier circuit may cause fluctuations in the gain of the forward channel of the system due to temperature changes, which will lead to instability in the performance of the fiber optic current transformer system , and the controller design in the prior art does not have countermeasures against this situation, so that the system performance will be affected by the gain fluctuation of the system forward channel, which reduces the performance of the optical fiber current transformer system

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