Hewang Electric applies for patents related to transient frequency control; the transient frequency control method addresses issues of low penetration frequency stability and reactive power support.

March 26 News: According to information from the National Intellectual Property Administration, Shenzhen HeWang Electric Co., Ltd. has applied for a patent titled “Transient Frequency Control Method, Device, Electronic Equipment, and Storage Medium.” The application publication number is CN121710272A, the application number is CN202512052264.2, the publication date is March 20, 2026, and the application date is December 31, 2025. The inventors are Xiong Chun, Long Tao, Zhou Dangsheng, Li Yunwen, Zhang Wei, Tong Yan, Wu Yanping. The patent agency is Shenzhen Jingying Innovation Intellectual Property Agency Co., Ltd., with patent agent Duan Yunpeng. The classification codes are H02J3/11, H02J3/001, H02J3/38.

The patent abstract states: The invention discloses a transient frequency control method, device, electronic equipment, and storage medium, which include respectively collecting the reference frequency of the grid point voltage before deep low-voltage ride-through, the real-time frequency of the grid point voltage during deep low-voltage ride-through, and the q-axis component of the grid point voltage; correcting the original d-axis current setpoint based on the q-axis component to obtain a corrected d-axis current setpoint; judging whether active power regulation capability fails based on the corrected d-axis current setpoint; if active power regulation is effective, adjusting the d-axis current via the corrected setpoint to make the real-time frequency close to the reference frequency; if it fails, calculating the phase error accumulation based on the reference and real-time frequencies; computing the q-axis compensation based on the phase error accumulation, and correcting the phase reference of the phase-locked loop based on the q-axis compensation. The invention not only solves the transient frequency stability issue during deep low-voltage ride-through but also ensures the accuracy of reactive power support.

HeWang Electric was established on April 20, 2007, and listed on the Shanghai Stock Exchange on July 28, 2017. Its registered address is in Shenzhen, Guangdong Province, with the same office address. The company is a leading enterprise in the domestic power conversion field, focusing on core products such as wind power converters, with strong technical strength and high investment value.

HeWang Electric specializes in power conversion, helping customers achieve efficient, reliable, and high-quality power generation, utilization, and transmission. It belongs to the Shenwan industry category of Power Equipment - Wind Power Equipment - Wind Power Components, involving concepts like energy storage, offshore wind power, and wind energy.

In 2025, HeWang Electric’s revenue was 4.168 billion yuan, ranking 2nd out of 4 in the industry. The top-ranked company is Daikin Heavy Industries with 6.174 billion yuan; the industry average is 4.198 billion yuan, and the median is 4.064 billion yuan. Main business segments include new energy electric control at 3.291 billion yuan (78.96%), engineering transmission at 627 million yuan (15.04%), among others. Net profit in 2025 was 541 million yuan, ranking 2nd out of 4, with Daikin Heavy Industries at 1.103 billion yuan; the industry average is 511 million yuan, median 428 million yuan.

Recent patent applications by Shenzhen HeWang Electric Co., Ltd. are as follows:

Disclaimer: The market involves risks; investment should be cautious. This article is automatically published by an AI model based on third-party databases and does not represent Sina Finance’s views. All information herein is for reference only and does not constitute personal investment advice. Please refer to official announcements for accuracy. For questions, contact biz@staff.sina.com.cn.