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Bulgaria developed a high-efficiency energy-saving meter sensor
Recently, the Bulgarian Institute of Management and Systems has made a groundbreaking advancement in the power industry by developing a new multi-purpose sensor for inductive watt-hour meters. This innovative sensor is 50 times more efficient than traditional Hall sensors, marking a significant leap forward in energy measurement technology.
Electricity meters are essential tools in the power sector, but they also consume some amount of energy. Experts from Bulgaria highlight that in a city as large as New York, the reactive energy consumed by these meters is nearly equivalent to the total power generated by the Niagara River hydropower station in the U.S., which has an installed capacity of 2 million kilowatts. While mechanical meters were once widely used, they have high energy consumption and an error rate of up to 7-8%, leading to their gradual replacement by inductive electronic meters. However, these electronic meters require current and voltage amplifiers, and calculating power involves considering the power factor (cosφ), which introduces additional complexity. Moreover, the parameters in the amplifier are non-linear, making linear processing technically challenging, and temperature variations can further affect performance.
To address these challenges, Bulgarian researchers have developed a low-cost, high-reliability sensor known as a "multisensor." This device, created using semiconductor silicon components, goes beyond simple measurements and integrates multiple functions into one compact unit. It not only measures magnetic fields and temperature but also allows for the extraction of other parameters like pressure, illumination, and telecommunications data during signal processing.
The newly developed integrated silicon multisensor can independently measure external magnetic field strength and direction (B) as well as ambient temperature (T). According to experts, this type of multi-purpose sensor is unique in the field of monitoring technology. It offers a wide range of applications, including non-contact electric power measurement, thanks to its ability to detect voltage (V) and current (I) without direct contact. With a 50x improvement in conversion efficiency over Hall sensors, this innovation has already been recognized by the EU, being included in the priority discussion projects of the 7th Framework Program.
The key technical advantage of this sensor lies in its ability to amplify induced voltage (V) and current (I). When a starting current flows through a conductor in a magnetic field, the sensor detects the perpendicular magnetic induction, effectively measuring the current without any physical contact. Unlike Hall elements, which are less sensitive and prone to temperature interference, this new sensor provides more accurate and stable readings, making it a game-changer in the field of electrical measurement.