Abstract
This paper presents a novel, scalable, and modular multiport power electronic topology for the integration of multiple resources. This converter is not only scalable in terms of the integration of multiple renewable energy resources (RES) and storage devices (SDs) but is also scalable in terms of output ports. Multiple dc outputs of a converter are designed to serve as input to the stacking modules (SMs) of the modular multilevel converter (MMC). The proposed multiport converter is bidirectional in nature and superior in terms of functionality in a way that a modular universal converter is responsible for the integration of multiple RES/SDs and regulates multiple dc output ports for SMs of MMC. All input ports can be easily integrated (and controlled), and output ports also can be controlled independently in response to any load variations. An isolated active half-bridge converter with multiple secondaries acts as a central hub for power processing with multiple renewable energy resources that are integrated at the primary side. To verify the proposed converter, a detailed design of the converter-based system is presented along with the proposed control algorithm for managing power on the individual component level. Additionally, different modes of power management (emulating the availability/variability of renewable energy sources (RES)) are exhibited and analyzed here. Finally, detailed simulation results are presented in detail for the validation of the proposed concepts and design process.
Highlights
For the realization of high voltage–high power operations with increased reliability, a multilevel inverter approach is usually preferred
To validate the performance of the proposed circuitry, simulation results are shown in Figure 5, where different operating modes are identified
This paper presents a novel multiport converter structure demonstrating that the easy integration of alternate energy sources can be achieved along with feeding isolated independent multiple loads
Summary
For the realization of high voltage–high power operations with increased reliability, a multilevel inverter approach is usually preferred. All conventionally used converters have an integrated operation and need to be shut down in case of a device/control failure that results in significant production loss in the industry In such cases, modularity may provide a better alternative. Three basic types of multilevel converters are used, i.e., diode clamped, flying capacitor, and cascaded H bridge These converters have different tradeoffs such as active/reactive power compensation, efficiency, scalability, modularity, components count, cost, and total harmonic distortion (THD) content. Considering these facts, a cascaded H Bridge is usually preferred for most electric machine drives and their related applications.
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