State Grid Corporation of China

State Grid Zhejiang Electric Power Co., Ltd. Taizhou Power Supply Company

Taizhou Power Supply Company of State Grid Zhejiang Electric Power

Z (P) Epc Electric Power Research Institute

Taizhou Economic Development Zone Transportation Inspection Branch of Taizhou Hongda Electric Power Construction Co., Ltd.

Chen Zhou

Guode Ying

Zhen Huang

Jian Wu

Chi Zhang

Jian Yang

Tao Zhu

Qian Zhang

Hua Xu

Yuande Zheng

Kang Wang

Hao Tan

Jiandong Si

Zaibing Zhou

Ping Zhao

Hao Li

Qingchun Zhao

Xiaotong Zhu

Ben Li

Xiaochun Xu

Yiping Shen

Yutao Qiu

Xu Jiang

Jianhua Lv

Xiaofei Wang

Huang Zhang

Qian Yu

Weizhong Chen

Dongqi Lu

Huanghao Ying

Ge Zhou

Jieli Bao

Xi Yang

Liwei Zhu

Qiuyang Cao

Shenglin Pang

Huiyong Qiu

Zhouhai Qian

Likui Feng

Xiulin Xiao

Canfei Hong

Zheng Qin

Disclosed are apparatus, electronic device, and method for stitching dual-camera images. The method includes collecting two images having overlapping photographic content. The method includes extracting and matching feature points of the two images. The method includes roughly aligning the two images by using a homography matrix. The method includes accurately aligning the two images by using a least squares method to complete stitching the two images.

Method and apparatus for stitching dual-camera images and electronic device

Provided is a determination method of differential protection suitable for an electricity transmission line with multi-terminal T-connection. The determination method includes: sampling and calculating all phase currents, and calculating a maximum fault component current &#x394;&#x130;in phase current amplitudes of each phase current, a differential current Iin the each phase current, a resistive current Iin the each phase current and a vector sum &#x394;&#x130;of fault component currents except &#x394;&#x130;in the phase current amplitudes of the each phase current; and comparing the maximum fault component current &#x394;&#x130;in phase current amplitudes of each phase current and a threshold setting value I, determining a value of a resistive coefficient K corresponding to the phase current amplitudes of the each phase current according to a comparison result, and performing differential determination on the differential current Iand the resistive current Iin phase current amplitudes of the each phase current according to a differential determination formula: if the differential current Iof the target phase satisfies the above differential determination formula, it is determined that a fault occurs in an area of the target phase.

Differential protection determination method

The present invention provides a process of oxygenated feed-water treatment of boilers in power station, carried out under an OT treatment process, suitable for both the monotube type boiler and the drum type boiler, and comprising an oxygenation stage comprising: a normal oxygenation converting stage and a decreased oxygenation film-supplementing stage; the normal oxygenation converting stage is a stage in which the feed water system is oxygenated both at the outlet of a condensate polishing system and at the inlet of a feed water pump of a high pressure feed water system, and the concentration of dissolved oxygen in the main steam is controlled to be &#x2266;5 &#x3bc;g/L; the decreased oxygenation film-supplementing stage is a stage in which, after an oxide film is formed in the feed water system, the amount of oxygenation at the high pressure feed water system is decreased so that the amount of the oxygen added is only for supplementing and maintaining the oxide film, while the concentration of dissolved oxygen in the main steam is controlled to be &#x2266;5 &#x3bc;g/L. It can ensure that a dense protection film can be formed and maintained on the metal surface of the pipes in a feed water system, thereby reducing the iron content in the feed water; excessive oxygen is prevented from entering the high temperature heating surface and causing the peeling off of the oxide skin; and the amount of oxygen consumed is significantly reduced, thereby decreasing the amount of maintenance.

Process for feed-water oxygenating treatment in boiler in power station

Growing community of inventors

Zhejiang, China

Chen Zhou