Xilinx Spartan-3A FPGA enhances control algorithm implementation for multi-terminal DRI power inverters
Product development for industrial applications requires extensive research and preparation in an environment where time limits and product specifications are constantly changing. While products in this area are not as fast as consumer electronics, they must be delivered quickly and with as many key features, features, and potentials as possible to develop a new generation of products. Companies strive to be industry leaders in their respective competitive arena, especially in new markets such as green energy, as they are still in their infancy and have no predetermined industry leaders, requiring pioneers to design, develop and launch new products. Success depends not only on an inspiring, dedicated team of engineers, advanced computing technology and new materials, but also on whether there are venture capitalists or government agencies that are able to improve energy generation, distribution, monitoring, metering and consumption. The method of prospects provides funding.
In the fall of 2011, engineers from Princeton Power Systems (PPS), a manufacturer of advanced power conversion products and alternative energy systems from New Jersey, presented their latest green power products. This Demand Response Inverter (DRI) is the result of a three-year collaboration between PPS, the US Department of Energy, and the Sandia National Laboratory's Solar Grid Integration System (SEGIS).
The multi-terminal DRI (Figure 1) has been developed with unique flexibility, offering higher reliability, higher efficiency and lower cost than currently available inverters. The DRI is equipped with multiple AC and DC terminals to route power to the grid, microgrid, DC energy storage system or dynamic load. Programmable power curves and charging curves increase control of generators, loads, and batteries to ensure greater efficiency. In addition, the use of high-capacity, long-life advanced switches maximizes reliability.
The Princeton Power System demonstrates the many features of DRI: improving grid connectivity and efficiency, enhancing the performance of renewable energy systems, and helping to achieve greater integration of electric vehicles and distributed generation systems. DRI is part of the company's "Sun Island" microgrid demo (Figure 2). This demonstration details the major advances in cleaning technology and manufacturing, including 200 kW solar arrays and lithium-ion battery systems.
Microgrids can operate independently of the main utility grid, providing reliable, low-carbon emissions. The Princeton Power System's DRI is compatible with diesel or gasoline AC generators, and can also use photovoltaic (PV) or wind power inputs. Small communities using DRI can reduce their reliance on the grid, reduce their carbon footprint and reduce utility costs. In addition, DRI provides storage and charging services for electric vehicles for grid services and photovoltaics.
Xilinx SPARTAN Technology To fully meet the needs of industrial product design, companies such as Princeton Power Systems take advantage of flexible development tools such as the Xilinx Targeted Design Platform (TDP) and are supported by their extensive ecosystem design services. In this case, the first challenge facing the engineering design team was to decide how to extend the input and output of the digital signal processor in the DRI system and how to implement the control and communication interface for parallel operation. PDS ConsulTIng provides design services for programmable digital systems in a variety of markets, including aerospace and military, broadcasting, industrial, scientific, and medical. The company provides work support for this project as a member of the Xilinx Alliance program.
The PDS consulting team provides on-site real-world operating system debugging and PCB startup, as well as off-site RTL and IP design services. In addition, we advised the developers of Princeton Power Systems on how to implement system control interfaces for their green power control algorithms. In the end, the engineer chose to combine the Xilinx Spartan® XC3SD3400A FPGA with the DSP as the primary system control component (Figure 3).
The Spartan-3A FPGAs feature a rich set of SelecTIOTM capabilities that provide a high degree of flexibility for implementations, especially for trigger signals and ADC input channels. The Xilinx Spartan-3A family is a perfect replacement for ASICs because its FPGAs allow field design upgrades to avoid high initial cost and lengthy development cycles, compared to the inherent low flexibility of traditional ASICs. The integrated technology supported by Spartan-3A makes Princeton Power Systems' patented control algorithms for green energy conversion a reality.
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