Magnetic valve type controllable reactor control system sampling circuit

Abstract

The invention provides a magnetic valve type controllable reactor control system sampling circuit which has the advantages of good instantaneity and accuracy. The problems of voltage and current sampling and the reference point of a thyristor trigger signal in a magnetic valve type controllable reactor control system are solved. The sampling circuit provided by the invention comprises bus side A, B and C phases, a load, a magnetic valve type controllable reactor MCR, a signal sampling and conditioning circuit. The sampling circuit is structurally characterized in that the signal sampling and conditioning circuit is connected with ADSP-BF506F; the ADSP-BF506F is communicated with a PC host computer through serial communication RS232 / 422 or RS485; the I / O port of the ADSP-BF506F is connected with a magnetic valve type controllable reactor MCR and carries out communication through an optical fiber; bus side A, B and C phases are connected with a voltage transformer PT and a current transformer CT; the first stage voltage transformer PT and the first stage current transformer CT are connected with the signal sampling and conditioning circuit; the signal sampling and conditioning circuit comprises a voltage sampling circuit and a current sampling circuit; and the ADSP-BF506F is connected with ADuC 7026 in a serial port communication manner.

Description

technical field [0001] The invention belongs to the technical field of power systems, and in particular relates to a sampling circuit of a magnetic valve type controllable reactor control system. Background technique [0002] With the rapid development of the power system and the continuous expansion of the power grid capacity, the structure of the power grid is becoming more and more complex. As a new type of reactive power compensation device, the magnetic valve controllable reactor MCR has been rapidly developed and applied in all aspects of the power system. , especially in voltage stabilization in wind power systems, reactive power compensation in substations and applications in high-voltage lines have shown great advantages in economy and reliability. When controlling the magnetic valve type controllable reactor, the most basic thing is to sample the voltage and current of each channel. [0003] Therefore, how to quickly and accurately collect various power parameters...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem that it is difficult to accurately measure high voltage and large current in real time at present, and provides a sampling circuit for a control system of a magnetic valve type controllable reactor; The voltage and current sampling problem and the reference point selection problem of the thyristor trigger signal in the controllable reactor control system

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