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Sleep mode makes energy Internet more energy-saving, image source: Reiko Matsushita
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A team of scientists at Nagoya University in Japan have developed a possible solution to one of the biggest problems of the energy Internet - energy efficiency. They do this by creating a controller with a sleep mode and only gets energy when needed.
Widespread power generation based on renewable energy has become a necessary means to respond to the climate crisis. One solution to achieve social electrification needs is the energy internet, which will operate like an information internet, but it will consist of energy from smart power generation, smart power consumption, smart interconnection and cloud-sharing connections.
When the information is sent over the Internet, it is divided into transmittable units called "data packets" which are marked as their destinations. Energy Internet is based on similar concepts. The information tag is added to the power pulse to create a cell called a "power pack." According to the request of the terminal, this information is then distributed over the network to where it is needed. However, one problem is that since packets are sent sporadically, the energy supply is intermittent. Current solutions, such as battery or capacitor , complicate the system and reduce its efficiency.
Another solution is the so-called "sparse control", where the executor of the terminal is active for some time and in sleep mode for the rest of the time. In sleep mode, they consume no fuel or electricity, thus saving energy efficiently and reducing environmental and noise pollution. While sparse control is used for a single actuator, it does not necessarily provide good performance when multiple actuators are used. The issue that determines how to do this on multiple actuators is called the "Maximum shutdown control issue."
Now, a research team at at Nagaya University, led by Professor Toshiichi Iwada, a doctoral student at the Graduate School of Engineering, has developed a model control scheme for multiple actuators. The model has a wake-up mode where it acquires and controls the necessary power packets when needed, and a sleep mode. The study was published in the International Journal of Robust and Nonlinear Control.
"We can see that our research is useful in motor control for production equipment," explains Professor Azuma. "This study provides a control system configuration method based on the assumption that energy supply is intermittent. Its advantage is that there is no need for batteries and capacitors. It is expected to accelerate the practical application of power-packet energy Internet."
