Qiulong Ni

Title: Qiulong Ni and Flexible Excitation Technology.

Introduction.

Qiulong Ni is an inventor based in Zhejiang, China, and works at State Grid Zhejiang Electric Power Co., Ltd. Research Institute. His patent work addresses power-system excitation technology, including equipment reliability and control during changing operating conditions.

Latest Patents.

Ni is associated with 1 patent: “Flexible Excitation System and Control Method Therefor.” The invention describes a system made up of parallel groups of flexible excitation power units, a deexcitation circuit unit, and a flexible excitation control unit.

The disclosed control method coordinates AC and DC circuit breakers with a deexcitation switch to support fault-tolerant operation within the power units. It also dynamically controls ceiling voltage when terminal voltage drops, using the system’s fast response to improve the forced-excitation output capacity of a self-shunt excitation system. To address potential overload of the excitation transformer, the invention includes an overload limiter intended to keep operation within the equipment’s allowable overload range.

Career Highlights.

Ni’s patent reflects work on flexible excitation systems for power applications. Its features focus on fault tolerance, rapid voltage response, and protection of excitation-transformer equipment.

Collaborations.

The supplied information identifies Ying Yang and Weizhen Sun as Ni’s coworkers. Their specific contributions to the patent are not stated.

Conclusion.

Qiulong Ni’s patent combines flexible excitation control, fault-tolerant operation, and transformer overload protection in a system designed to support reliable power-system performance.