A control method and related equipment for a cascaded converter
A technology of cascaded converters and control methods, applied in the field of communication, can solve the problems affecting the operation accuracy and reliability of the system, PWM control signal jitter, and high bandwidth requirements, so as to improve the control output effect, and improve the operation accuracy and reliability. , the effect of reducing costs
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Embodiment 1
[0050] This embodiment describes the perspective of the unit control device of the cascode converter, and the unit control device of the cascade converter may specifically be a unit controller of a power unit.
[0051] A method for controlling a cascaded converter, comprising: receiving control information sent by a master controller, the control information including at least a modulation signal, generating a carrier signal according to the control information and configuration parameters of a power unit, and generating a carrier signal according to the modulation signal Generate a PWM control signal with the carrier signal, and control the switching semiconductor power device of the power unit according to the PWM control signal.
[0052] see figure 1 , the specific process can be as follows:
[0053] 101. Receive control information sent by the main controller, wherein the control information includes at least a modulation signal, and the modulation signal is calculated by...
Embodiment 2
[0072] This embodiment describes the perspective of the main controller of the cascaded converter.
[0073] A control method for a cascaded converter, comprising: sampling and calculating a collection signal according to an upper layer control algorithm to obtain a modulated signal, and sending control information to a unit controller of each power unit, wherein the control information includes at least the modulated signal, So that the unit controller generates a carrier signal according to the control information and configuration parameters of the power unit, generates a PWM control signal according to the modulation signal and the carrier signal, and controls the switching semiconductor power devices of the power unit according to the PWM control signal.
[0074] see figure 2 , the specific process can be as follows:
[0075] 201. Sampling and calculating the acquisition signal according to the upper layer control algorithm to obtain the modulation signal;
[0076] 202....
Embodiment 3
[0084] According to the methods described in Embodiments 1 and 2, examples will be given below to describe in detail.
[0085] In this embodiment, the communication between the main controller and the unit controllers of the power units using optical fibers will be taken as an example for description. see Figure 3a , the figure is a schematic diagram of the scene of the control system of the cascaded converter, the control system of the cascaded converter may include a main controller and a power unit, wherein the power unit may include a unit controller and a switching semiconductor power device, wherein each The main functions of the section are as follows:
[0086] 1. The main controller is used to calculate the received acquisition signal according to the control algorithm to obtain a modulated signal, and send control information to the power unit, wherein the control information includes the modulated signal, and the control signal may also include synchronization info...
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