Yaoyao Ji

Title: Yaoyao Ji: Innovator in Circuit Protection Technologies

Introduction

Yaoyao Ji is a notable inventor based in Jiangsu, China. He has made significant contributions to the field of electrical engineering, particularly in circuit protection technologies. With a total of 2 patents to his name, his work focuses on enhancing the reliability and safety of electrical systems.

Latest Patents

Yaoyao Ji's latest patents include innovative methods and apparatuses for identifying open phases in circuit breakers based on voltage. This method involves measuring three-phase voltages at both sides of a circuit breaker and calculating vector differences and effective values. When the phase voltages exceed 80% to 90% of the rated voltage, and the voltage vector difference surpasses a set threshold, the system determines an open phase condition, triggering an alarm or tripping operation after a short delay.

Another significant patent is a relay protection method against LC parallel circuit detuning faults. This method samples the current of a parallel LC circuit and converts the reactor current into an equivalent capacitor current. By calculating the current amplitude ratios and monitoring the total current, the system can send alarm signals or trip the circuit if the current ratio exceeds preset limits.

Career Highlights

Yaoyao Ji has worked with prominent companies such as Nr Electric Co., Ltd and Nr Engineering Co., Ltd. His experience in these organizations has allowed him to develop and refine his innovative ideas in circuit protection.

Collaborations

Some of his notable coworkers include Jun Chen and Shouping Zhong, who have contributed to his projects and innovations in the field.

Conclusion

Yaoyao Ji's contributions to circuit protection technologies demonstrate his commitment to improving electrical safety and reliability. His innovative patents reflect a deep understanding of electrical systems and a dedication to advancing the field.