Method, device and system for inhibiting ring current between large power PWM (Pulse-Width Modulation) rectification power supply modules
A technology of rectifying power supply and circulating current suppression, applied in the field of power system, can solve the problems affecting the security of distribution network, inconsistent switching time of multiple rectifying power supply modules, etc., to achieve the effect of balancing load, improving safety and stability, and suppressing circulating current.
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0031] Example one
[0032] Such as figure 1 As shown, the embodiment of the present invention provides a method for suppressing circulating current between high-power PWM rectifier power modules. The high-power PWM rectifier power includes a first rectifier power module and a second rectifier module, and the method includes:
[0033] S10. Collect the three-phase input current of the first rectifier power module to obtain the circulating current between the first rectifier power module and the second power rectifier module;
[0034] S20: Obtain the phase difference of the triangular carrier signal of the first rectification power module and the second rectification power module according to the circulating current;
[0035] S30. Calculate carrier compensation delay time according to the carrier phase difference;
[0036] S40. Adjust the phase of the triangular carrier signal of the first rectifying current module according to the carrier compensation delay time to synchronize the phase...
Example Embodiment
[0055] Example two
[0056] Such as figure 2 versus image 3 As shown, the high-power PWM rectified power supply provided by the embodiment of the present invention includes: a rectified power main circuit 100 composed of a first rectified power module 101 and a second rectified power module 102 in parallel, a circulating current suppression device 200, and a voltage and current control module 300.
[0057] Among them, the circulation suppression device 200 provided by the embodiment of the present invention, such as figure 2 versus image 3 Shown, including:
[0058] The circulating current obtaining module 202 is used to collect the three-phase input current of the first rectifying power supply module to obtain the circulating current between the first rectifying power supply module and the second power rectifying module; wherein the circulating current obtaining module 202 calculates the data collected by the collecting unit 201 Three-phase input current i of the second rectif...
Example Embodiment
[0065] Example three
[0066] The embodiment of the present invention also provides a circulating current suppression system between high-power PWM rectifier power modules, including the circulating current suppression device described above. Based on the same invention objective, solving the same technical problem, and achieving the same technical effect, the embodiments of the present invention will not be repeated one by one.
[0067] In summary, the embodiment of the present invention provides a method, device and system for suppressing circulating current between high-power PWM rectifier power modules. The circulating current is obtained by collecting the input current of the rectifying power module, and the carrier of the two rectifying power modules is obtained according to the circulating current. The carrier compensation delay time is then obtained. According to the carrier delay time, the carrier phase of one of the rectifier power modules is adjusted to realize the phase...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap