Power electronic equipment control initialization method

Abstract

The invention provides a power electronic equipment control initialization method, which comprises the following steps of: (1) before a target control strategy is started, measuring electrical quantity from an actual system to obtain a state, and collecting real-time electrical quantity data to obtain setting value information required by a control loop; (2) realizing integrator initial value setting in the control loop according to setting value information required by the control loop in the step (1), and locking an integrator initial value before starting control; and (3) setting a target control strategy reference value as the electrical quantity measurement value obtained in the step (1), sending a control starting signal to modulation and valve group control by the control system, and starting a control strategy. When the control strategy is initialized, the circuit impact is reduced by setting the initial value of the integrator in the control system and the control target reference value, the rapidity and stability of power electronic equipment control in starting are improved, more application scenes are provided for the power electronic equipment, and the method can be widely applied to the field of power electronics.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and relates to a control initialization method for power electronics equipment. Background technique [0002] With the development of power electronic technology, power electronic equipment such as VSC-HVDC (high voltage direct current transmission technology based on voltage source converter), DFIG (double-fed induction motor), SVC (static var compensator), STATCOM (static Synchronous compensator), etc., have been widely used in power systems. In the control strategies of these power electronic devices, integrators are usually used in the control loop. The zero-error control is realized in different control strategies through the integrator, and different control objectives are achieved. During the start-up of equipment valve control, or in the process of switching control strategies, etc., if the control strategy is started with the same settings as normal operation, a large impact ...

AI Technical Summary

Problems solved by technology

At the same time, since the initial value of the integrator is unknown before the start of the control strategy for power electronic equipment, it will cause unpredictable problems, so the output value of the integrator needs to be reset to zero

However, clearing the initial value of the integrator is one of the reasons for the circuit shock during the control startup process, which leads to a large shock at the startup of some control strategies, thus increasing the difficulty of the control startup

This is because the initial value of the integrator is cleared, and the output value of the integrator is zero, which causes the control quantity to be different from the corresponding electrical quantity in the actual circuit.

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