Control method of robust intelligent control device of one-way conduction device

Abstract

The invention discloses a control method for a robust intelligent control device of a one-way conduction device, and relates to the technical field of control, and the method specifically comprises the following steps: (1) constructing a small signal circuit model of the one-way conduction device by using the Kirchhoff's law, taking an output current and an output voltage as state variables, and using a state space averaging method to obtain state equations of output current and output voltage of the system; (2) constructing an observation equation based on output signals of the voltage sensor and the current sensor; (3) accurately measuring the voltage signal and the current signal through a state equation and an observation equation in combination with a Huber-based Kalman filter; (4) designing a PID controller to control the output voltage and the output current of the one-way conduction device; (5) constructing a fitness optimization function, and optimizing parameters of the PID controller by adopting a global optimization algorithm. The method not only can eliminate abnormal values output by the voltage sensor and the current sensor, but also has high control precision.

Description

technical field [0001] The invention relates to the technical field of control, in particular to a control method for a robust intelligent control device of a unidirectional conduction device. Background technique [0002] With the development of science and technology and urbanization, large-capacity rail transit (subway, light rail) is also playing an increasingly important role in cities, and has become an indispensable part of urban people's lives. [0003] Since ballasted ballast beds are mostly used in parking lots and depots, the leakage resistance of the rails to the ground is lower than that of the overall ballast bed on the main line. Large stray current leakage. Therefore, in order to ensure that the main line current does not leak into the ground through the rails in the field section, insulating joints and ordinary one-way conducting devices are usually installed on the rails at the boundary point between the ballast bed and the integral ballast bed in the acce...

AI Technical Summary

Problems solved by technology

However, although the stray current leakage in this section can be alleviated by adopting the method of insulating joints and one-way conduction, due to the reverse cut-off function of the one-way conduction device, the traction return current can only flow back to the traction substation from one side of the track. This one-way backflow method will cause sudden changes in the voltage and current at the contact point between the train and the rail when the subway passes through the insulation joint, thereby generating a high-intensity arc and causing the track potential to rise, especially when the locomotive uses regenerative braking. When passing through the insulation section, the arcing phenomenon is more serious due to the change of the current direction

The burning of the insulation section will have serious consequences. One is that it is difficult to replace the insulation section after it is burned, and the maintenance time is long, which affects the normal operation of the train.

The second is that when the insulation joint is burnt by arcing, it will burn the rail and cause the rail to be uneven, which will affect the driving safety when the train is running at high speed

This causes the one-way conduction device to be in harsh working conditions for a long time, and electromagnetic interference will affect the accuracy of electronic instruments and the normal operation of electronic equipment. As a result, it will not only reduce the control accuracy and dynamic performance of the one-way conduction device, but also affect reduce the reliability of its operation

Images