Jiangsu University

Southeast University

State Grid Corporation of China

State Grid Jiangsu Electric Power Company

State Grid Jiangsu Electric Power Company Research Institute

China University of Mining and Technology

Feng Wang

Long Chen

Yingfeng Cai

Zhen Zhu

Changgao Xia

Jiangyi Han

Dehua Shi

Gang Chen

Xiang Tian

Qiang Zhou

Jijun Yin

Bin Yang

Xing Xu

Chaochun Yuan

Xiao Chen

Shihai Yang

Qifeng Huang

Zhixin Li

Shuangshuang Zhao

Wenguang Chen

Shufeng Lu

Xuping Zhang

Yixin Zhang

Shun Wang

Haowei Zhang

Mingfeng Xue

Lingying Huang

Qingshan Xu

Minrui Xu

Zhenyu Chen

Xiaodong Sun

Haifeng Li

Xiao Lu

Chi Zhang

Lin Liu

Chaofeng Pan

Juncheng Wang

Xiaoxing Zhong

Botao Qin

Yaohong Li

Yefeng Jiang

Zuofeng Li

Feng Ye

Chen Xia

Fei Xiong

Xiaohong Chen

Shuai Tong

Haoran Wang

Ruofan Wang

Shaoxiong Tang

A monitoring system and method for broken wires in PCCP based on distributed optical fiber sensing relates to the technical field of optical fiber sensing. The monitoring system for broken wires in PCCP comprises a Sagnac interferometer, a Φ-OTDR system, a dual loopback system and a signal processing system. The Sagnac interferometer comprises a first laser, a first optical coupler, a first delay optical fiber, a Faraday rotating mirror and a first photodetector. The Φ-OTDR system comprises a second laser, a second optical coupler, an acousto-optic modulator, a circulator, a third optical coupler and a second photodetector. The dual loopback system comprises a wavelength division multiplexer and a second delay optical fiber. The invention solves the problems of low positioning accuracy, limited frequency measurement range, detection dead zone and high computing pressure in monitoring broken wires in PCCP.

Monitoring system and method for broken wires in PCCP based on distributed optical fiber sensing

The invention discloses an underwater umbilical cable which is capable of temperature and vibration measuring and three-dimensional shape reconstruction, wherein underwater umbilical cable is used to connect underwater equipment and aquatic equipment; the underwater umbilical cable comprises an outer sheath, armored steel wires, an inner sheath, a power cable, a communication optical cable, a steel pipe, three strain measuring optical fibers, three temperature measuring optical fibers, a distributed optical fiber strain interrogator, a distributed optical fiber temperature interrogator and a processor. The invention can collect the operation status data of the umbilical cable for a long time. The collected data is highly objective, can truly reflect the real-time operation status of the umbilical cables, and plays an important role in guaranteeing the long-term submarine oil and gas exploitation.

Underwater umbilical cable which is capable of temperature and vibration measuring and three-dimensional shape reconstruction

A power split and power convergence combined hydro-mechanical hybrid transmission device includes an input member, a power split mechanism, a mechanical transmission mechanism, a power convergence mechanism, an output member, a hydraulic transmission mechanism, a clutch assembly, and a brake assembly. The input member is connected to the power split mechanism, the power convergence mechanism is connected to the output member, and the clutch assembly connects an output end of the power split mechanism to an input end of the mechanical transmission mechanism and an input end of the hydraulic transmission mechanism and connects an input end of the power convergence mechanism to an output end of the mechanical transmission mechanism and an output end of the hydraulic transmission mechanism. The clutch assembly and the brake assembly provide a continuous transmission ratio between the input member and the output member.

Power split and power convergence combined hydro-mechanical hybrid transmission device

A continuously variable transmission system for hybrid power multi-mode switching, includes an input component, an output component, a clutch assembly, a brake, a hydraulic transmission assembly and a planetary gear assembly, wherein the input component is connected with the hydraulic transmission assembly, the output component is connected with the planetary gear assembly, the clutch assembly connects the input component and the hydraulic transmission assembly to the planetary gear assembly respectively, and the brake and the clutch assembly provide a transmission ratio for continuous forwarding or backwarding continuously between the input component and the output component. The hydro-mechanical transmission is switched to mechanical transmission by increasing the displacement ratio of the hydraulic transmission assembly linearly or non-linearly.

Hybrid multi-mode switching continuously variable transmission system

Provided is a user side load response method based on adjustment and control on temperature of load clusters. The user side load response method includes: performing thermodynamic modeling on a temperature control load to obtain a temperature control model in direct load control; constructing a mapping quantity to describe the change state of a temperature control load relay switch; obtaining adjustable capacity of the temperature control load through the mapping quantity; introducing temperature control load clusters to solve the problem that control precision cannot satisfy condition requirements; and finally calculating the influence of each load cluster in different load cluster control schemes on comfort degree.

User side load response method based on adjustment and control on temperature of load clusters

A hydro-mechanical hybrid transmission device and a control method thereof are provided. The device includes an input shaft, a split mechanism, a mechanical transmission assembly, a hydraulic transmission assembly, and an output shaft, wherein the input shaft is connected, through the split mechanism, to the mechanical transmission assembly and the hydraulic transmission assembly that are connected in parallel, and the mechanical transmission assembly and the hydraulic transmission assembly are both connected to the output shaft. The mechanical transmission assembly includes a front planetary-gear-set assembly and a rear planetary-gear-set assembly. The front planetary-gear-set assembly and the rear planetary-gear-set assembly are connected in series. The control method includes three modes of transmission: pure hydraulic transmission, hydro-mechanical hybrid transmission, and pure mechanical transmission are implemented through combination and engagement/disengagement of gear-shift components.

Hydro-mechanical hybrid transmission device with multiple power distribution modes and control method thereof

Provided is a power grid adjustment method based on a load of a variable frequency air conditioner. The method includes: establishing a mathematical simulation model of a virtual synchronous motor in a variable frequency air conditioner controller; establishing a virtual inertia control segment and a droop control segment of power grid adjustment according to the mathematical simulation model; obtaining a reference value &#x394;&#x3c9; of rotation speed variation of a compressor by the virtual inertia control segment; obtaining a reference value &#x3c9;of rotational angular frequency of the compressor by the droop control segment; and inputting a sum of the reference value &#x3c9;of rotational angular frequency of the compressor and the reference value &#x394;&#x3c9; of rotation speed variation of the compressor into a field-oriented controller (FOC) to control rotation of a motor.

Power grid adjustment method based on loads of variable frequency air conditioner

Disclosed is a physical-chemical composite inhibitor for controlling spontaneous combustion of low-rank coal, and methods of preparing and using the same. The composite inhibitor consists of a chelate and attapulgite, the chelate is generated by chelation of proanthocyanidin with calcium chloride. The composite inhibitor has moisture-absorbing and moisture-retaining effect, and can reduce water dissipation at low temperature. A stable oxide insulating layer such as MgO and AlOinsulating layer can be formed at high temperature, which can block a coal body from contacting with oxygen. In addition, the composite inhibitor can capture hydroxyl free radicals generated during the chain-cycle reaction and destroy peroxide free radicals, and can also interact with an active moiety in coal to form a stable structure such as ether linkage and hydrogen bonding, thereby achieving permanent inhibition of low-rank coal.

Physical-chemical composite inhibitor for controlling spontaneous combustion of low-rank coal and method of preparing and using same

Growing community of inventors

Jiangsu, China

Feng Wang