A control pulse modulation method, device, equipment and storage medium

A technology for controlling pulses and modulation methods, which is applied to output power conversion devices, electrical components, and AC power input to DC power output. It can solve the problems of inconvenience and inability to accurately control voltage waveforms, and achieve harmonic interference suppression. The effect of flexible and accurate control

Active Publication Date: 2021-08-24
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Problems solved by technology

[0005] The invention provides a control pulse modulation method, device, equipment and storage medium, which solves the inconvenient problem that the existing control pulse modulation methods cannot accurately control the voltage waveform and suppress harmonics when the voltage variation range is large. technical problem

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  • A control pulse modulation method, device, equipment and storage medium
  • A control pulse modulation method, device, equipment and storage medium
  • A control pulse modulation method, device, equipment and storage medium

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Embodiment Construction

[0052] The embodiments of the present invention provide a control pulse modulation method, device, equipment and storage medium, which are used to solve the problem that the existing control pulse modulation methods cannot accurately control the voltage waveform and suppress harmonics when the voltage variation range is large. Inconvenient technical issues.

[0053] Nearest Level Controll (NLC) is also called quantized rounding method. Its principle is to use the nearest level to approximate the modulation wave instantaneously. The principle is simple and easy to implement, and it is suitable for occasions where the MMC level is very high. This method is currently the most practical MMC modulation method, and has been practically applied in many projects.

[0054] From the output voltage waveform, the nearest level approximation modulation is similar to the ladder wave modulation. This modulation method is simple in principle, easy to implement and high in efficiency. However, w...

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Abstract

The invention discloses a control pulse modulation method, device, equipment and storage medium, and relates to a minimum level approximation modulation module, a space vector pulse width modulation module and a plurality of MMC submodules. The flat approximation modulation module generates the first driving signal; receives the signal to be modulated and the preset triangular carrier signal, and generates the second driving signal through the space vector pulse width modulation module; approximates the real-time conduction status of the modulation sub-module of the modulation module according to the lowest level According to the pulse control signal, determine the control sequence of multiple MMC sub-modules; based on the pulse control signal and control sequence, generate control pulses for multiple MMC sub-modules And output, it can flexibly and accurately control the voltage waveform in the case of a large voltage variation range, while suppressing harmonic interference.

Description

technical field [0001] The present invention relates to the technical field of signal modulation, in particular to a control pulse modulation method, device, equipment and storage medium. Background technique [0002] With the rapid development of power electronics technology, modular multilevel converter (MMC), as a new topology of multilevel converter, has shown extremely important engineering application prospects. Compared with traditional two-level or three-level VSC, MMC and two-level and multi-level voltage source converter topology, MMC has no DC energy storage capacitor between the positive and negative poles of the DC side, through the control In the switching state of all sub-modules, the converter can output a voltage waveform with good waveform quality in the AC measurement, and maintain the dynamic stability of the DC voltage on the DC side. The advantages of flexible voltage level control, less harmonic content, low switching loss, and small filter capacity h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/5395H02M7/5387H02M7/501H02M1/12
CPCH02M1/12H02M7/501H02M7/53875H02M7/5395H02M7/53876
Inventor 骆潘钿刘正富王朋苏雷涛苏伟盛超郭敬梅王红星赵伟
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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