Q-axis excitation control device of double-axis excitation phase modifier

Abstract

The invention discloses a q-axis excitation control device of a double-axis excitation phase modifier. The q-axis excitation control device comprises a K60 hardware platform, an alternating current sampling module, a rotating speed and torque sensing module, a switching value input and output module, a thyristor driving module, a communication module, a man-machine interface module and a power supply module. The phase modifier can flexibly operate under the working conditions of single-axis excitation, double-axis excitation and positive and negative alternating excitation, the limitation thatthe minimum exciting current is zero is broken through, the phase modifier obtains the short-time phase advance capacity equivalent to the delayed phase overload capacity through reverse excitation,the overvoltage suppression effect of unit installation is greatly improved, the problems of out-of-step and violent power fluctuation of the double-shaft excitation phase modifier under the reverse excitation working condition are solved.

Description

technical field [0001] The present application relates to the field of generator excitation control, in particular to a q-axis excitation control device for a dual-axis excitation condenser. Background technique [0002] The phase advance capability of traditional condensers or generators is limited by the minimum excitation current being zero, and its maximum short-term phase advance capability depends entirely on the reactance parameters of the body, which is far less than the delayed phase overload capability, which is very unfavorable for suppressing overvoltage levels. If the phase advance capability is improved by further optimizing the parameters of the condenser, it will inevitably lead to a substantial increase in the cost and the effect is limited. The dual-axis excitation condenser and its control technology can enable the condenser to flexibly operate under single-axis excitation, dual-axis excitation, and positive and negative alternating excitation conditions, ...

AI Technical Summary

Problems solved by technology

[0004] This application provides a q-axis excitation control device for a dual-axis excitation condenser, which is used to solve the out-of-step problem of the dual-axis excitation condenser during reverse excitation under system overvoltage conditions, as well as the resulting active and reactive power. Uncontrollable Severe Oscillation of Work Power

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