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Multi-rate (MR) simulation is necessary for a system which contains both large and small time constraints. In the traditional MR real-time simulation of MMC, only the MMC valves are implemented on FPGA with a small time-step, while the rest parts are implemented on central processing units (CPU) with a large time-step. This paper presents a fully FPGA based MR real-time simulation of two MMC terminals...
Real-time simulation is an important tool of validating the performance of the modular multilevel converter (MMC). By using the field programmable gates array (FPGA), MMC valves with hundreds of sub-modules and the large number of inputs and outputs can be simulated in real-time. In the traditional FPGA based real-time simulation, only the MMC valves are implemented on FPGA, while the rest parts including...
Aimed at the high requirements of real-time in barrage video system, a barrage distribution strategy based on the earliest deadline first algorithm is proposed in this paper, which distributes all the barrages in the system to balance the best of the barrage completion rate and the completion rate of important barrages. The system will assign dynamic priority level to each new arrival barrage, and...
Electric vehicle parking lot is a kind of profit service facilities nearby commercial office buildings for electric vehicles to park and charge. A V2P model is built to describe electric vehicles charging in the parking lot based on V2G (vehicle to grid) technology. Under the conditions of real-time pricing, improved particle swarm optimization (PSO) algorithm is applied to study on charging strategies...
Modular multilevel converter (MMC) is a promising topology for medium and high power applications. The MMC system consists a large number of sub-modules (SMs), which take long time to simulate. In a real-time simulator, the MMC model is optimized to have a fast simulation speed for real-time applications, such as hardware-in-the-loop (HIL) tests. The methodology to evaluate model fidelity is important...
With the continuous miniaturization of solder joints, the formation of large Ag3Sn plates in Ag containing solders has a detrimental effect on the reliability of solder joints. In the present work, synchrotron radiation real-time in situ imaging technology was used to study the dissolution and precipitation behavior of Ag3Sn plates, as well as the undercooling of Ag3Sn plates and the solder balls,...
The thermal power system become more complex as it develops to the direction of large-scale. This brings high efficiency as well as brings much hidden risk. Once the failure appears, less leads to the decrease of operating load, more leads to catastrophic shutdown, and even damage the unit equipment. Therefore, the research on the real-time temperature on-line monitoring system for thermal power units...
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