State Grid Tianjin Electric Power Company

State Grid Corporation of China

Other

Electric Power Science & Research Institute of State Grid Tianjin Electric Power Company

Shangai Wiscom Sunest Electric Power Technology Co., Ltd.

Electric Power Science & Research Institute of State Grid Tianjin Electric Power

Ke Xu

Xudong Wang

Xianxu Huo

Guodong Li

Yan Qi

Nan Wang

Chang Liu

Tao Liu

Yu Xuan Zhang

Yi Ding

Jun Zhang

Kai Wang

Shiqian Ma

Chi Zhang

Wei Fan

Zhengzheng Meng

Jingjing Yan

Xu Li

Lei Wu

Chun He

Xiaohui Zhu

Tianchun Xiang

Fengzheng Zhou

Longji Li

Qinghua Tang

Lu Sun

Lei Yang

Shengchen Fang

Yang Yu

Pan Zhang

Haoming Wang

Pengxian Song

Ning Jiang

Wei Liang

Wangxi Xue

Weibin Song

Qiuliang Jiao

Lingxu Guo

Zheng Wang

Ping Tang

Yanjun Wen

Ling Jiang

Cheng Sun

Honglei Zhao

Baoguo Zhao

Mingzheng Zhu

Haibiao Wang

Qinghu Hu

Qingshan Xu

Aidong Zeng

Chao Huang

Defect detection method for a semi-conducting bedding layer of a power cable includes: obtaining a length parameter, a corrugation pitch parameter, radius parameters, and a thickness parameter of a power cable; obtaining a first resistance value between a shield and a corrugated sheath, and calculating a second resistance value of the shield based on the length parameter and the corrugation pitch parameter; calculating a radial resistance value of the semi-conducting bedding layer based on the first resistance value and the second resistance value; determining a contact angle of a critical point of contact between the corrugated sheath and the semi-conducting bedding layer based on the radius parameters and the thickness parameter; calculating volume resistivity of the semi-conducting bedding layer based on the radial resistance value and the contact angle; and comparing the volume resistivity with a preset evaluation parameter to obtain a defect detection result of the semi-conducting bedding layer.

Defect detection method, apparatus, and device for semi-conducting bedding layer of power cable

Disclosed are a distribution transformer terminal and a method for monitoring a state of a distribution transformer court device. The distribution transformer terminal includes an ARM core processor, a carrier communication module connected to a court device, a sub-G wireless communication module connected to the court device and a GPS module connected to the court device. The ARM core processor is connected to the carrier communication module, the sub-G wireless communication module and the GPS module. The ARM core processor is configured to identify a phase of the court device and a court to which the court device belongs, acquire an operating state and fault information of the court device through the sub-G wireless communication module, and acquire geographical location information of the court device through the GPS module.

Distribution transformer terminal and method for monitoring a state of a distribution transformer court device

The invention relates to a method for real-time scheduling of multi-energy complementary micro-grids based on a Rollout algorithm, which is technically characterized by comprising the following steps of: Step 1, setting up a moving-horizon Markov decision process model for the real-time scheduling of the multi-energy complementary micro-grids with random new-energy outputs, and establishing constraint conditions for the real-time scheduling; Step 2, establishing a target function of the real-time scheduling; Step 3, dividing a single complete scheduling cycle into a plurality of scheduling intervals, and finding one basic feasible solution meeting the constraint conditions for the real-time scheduling based on a greedy algorithm; and Step 4, finding a solution to the moving-horizon Markov decision process model for the real-time scheduling of the multi-energy complementary micro-grids by using the Rollout algorithm based on the basic feasible solution from Step 3. With the consideration of the fluctuations in the new-energy outputs, the present invention solves the problems of low speed and low efficiency of a traditional algorithm at the same time, enabling high-speed efficient multi-energy complementary micro-grid real-time scheduling.

Method for real-time scheduling of multi-energy complementary micro-grids based on rollout algorithm

The invention relates to an automatic checking method for clock synchronization, comprising the following steps: (1) regularly acquiring clock signals sent by a Beidou signal source, a GPS signal source and an SNTP signal source; (2) performing subtraction to the clock signals of the Beidou signal source and the GPS signal source and evaluating the absolute value of the difference; at the same time, performing subtraction to the clock signals of the Beidou signal source and the SNTP signal source and then evaluating the absolute value of the difference and finally judging the results of the two differences; and (3) constantly repeating steps (1) and (2). The operations in the present invention can efficiently avoid the problems in the existing technology, guarantee the consistency and accuracy of system time, and guarantee the stable and safe operation of the system and the normal operation of other power grid businesses.

Automatic checking method for clock synchronization and specialized apparatus thereof

Growing community of inventors

Tianjin, China

Ke Xu