Real-time online simulation system of mmc type high-voltage inverter based on rt-lab and wigig

Abstract

The invention discloses a real-time online simulation system of an MMC type high-voltage frequency converter based on RT-Lab and WiGig. The system includes a host computer, a target machine, a controller, an MMC type high-voltage frequency converter, and a WiGig wireless communication module. The communication specification of the WiGig wireless communication module adopts the G.hn standard. Collect the output signal of the MMC high-voltage inverter control unit through the RT-LAB simulator, realize the capacitor voltage balance control and modulation of the MMC high-voltage inverter rectifier side and the inverter side converter, and simulate the MMC high-voltage inverter in real time The real-time wireless signal interaction between the real equipment of the control unit realizes the simulation control of the MMC type high-voltage inverter. The invention effectively improves the data transmission rate among various components in the system, provides a large amount of technical reference data for the real-time control of the MMC type high-voltage frequency converter, and can greatly shorten the research and development cycle and cost of the MMC type high-voltage frequency converter.

Description

technical field [0001] The invention belongs to the technical field of power electronics and electric transmission, and in particular relates to a real-time on-line simulation system of an MMC type high-voltage frequency converter based on RT-Lab and WiGig. Background technique [0002] In recent years, the modular multilevel converter (Modular Multilevel Converter, MMC) has received more and more attention. It inherits the modular advantages of the H-bridge cascaded structure, and realizes multilevel by cascading power units. output. Each power unit is composed of a two-level bridge arm, and all capacitors are suspended. Due to the existence of a common DC bus, a single DC voltage can be used without the need for a multi-winding transformer. Each bridge arm sub-module of MMC can be selectively controlled, so that it can be equivalent to a controllable voltage source. The sum of the voltages of the two bridge arms in each phase of MMC is equal to the DC bus voltage. By cont...

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Problems solved by technology

[0003] At present, pure digital simulation software such as MATLAB / SIMULINK, PSCAD / EMTDC and PSIM are mostly used for research on high-voltage inverters, which have shortcomings such as not being able to simulate the operation of inverters, and being inconvenient for real-time development and transplantation of control algorithms.

Literature "Zheng Zheng, Cui Can, Zhang Peng. New high-voltage inverter topology and its control based on modular multilevel converters [J]. Coal Journal, 2014, 39(10): 2128-2133" based on Matlab- Simulink and RT-Lab hardware-in-the-loop simulation equipment have built an experimental platform and host computer controller, but this document does not involve WiGig wireless communication technology, and the interactive simulation between PSCAD / EMTDC and MATLAB / SIMULINK is not considered in the host computer model construction

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