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Abstract
Smart Internet of Isolated Capacitor Trip Device for High-voltage Protective Relay of Backup Power
Highlights
The discovery and popularity of electricity have brought about the unprecedented development of scientific and technological civilization in human history, and electric power has become an indispensable element in people’s lives
(1) Discharge time test of DC power supply without load (a) When the voltage at the DC power supply terminal drops to 70% of its rated value, the time required for discharge is 223 s. (b) When the voltage at the DC power supply terminal drops to 50% of its rated value, the time required for discharge is 454 s. (c) When the voltage at the DC power supply terminal drops to 0% of its rated value, the time required for discharge is 2204 s
(2) Test when the DC power supply terminal is connected to the overcurrent protection relay with a load of 8 W: When the voltage at the DC power supply terminal drops to 70% of its rated value, the time required for discharge is 11.5 s
Summary
The discovery and popularity of electricity have brought about the unprecedented development of scientific and technological civilization in human history, and electric power has become an indispensable element in people’s lives. Of green energy sources,(11) so ensuring the operation of protective relay stations is the top priority.[12,13,14] in high-voltage power systems, overload or short-circuit issues originating from user equipment result in frequent power accidents. As stated above, CTDs must be equipped to ensure the operation of the power system supply.[15,16] the malfunction of relays due to the insufficient capacitance or low output operating voltage of the CTDs currently on the market renders an isolated capacitor tripping device with the functions of self-detection and instant fault notification, one of the most important products in protective circuits of power systems. Compared with common CTD products, Smart-CTDs can prevent instantaneous excessive current from being transmitted to the electrical equipment, ensuring the continuity of its power supply, measure and report the power status in real time, stabilize the power supply, prevent overcurrent, and protect equipment from being damaged
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