Jiangsu Electric Power Research Institute Co., Ltd.

State Grid Jiangsu Electric Power Company

State Grid Jiangsu Electric Power Co., Ltd. Research Institute

State Grid Corporation of China

State Grid Jiangsu Electric Power Company Research Institute

State Grid Jiangsu Electric Power Research Institute

Taizhou Power Supply Branch of State Grid Jiangsu Electric Power Co., Ltd.

Jinggang Yang

Yubo Yuan

Mingming Shi

Jian Liu

Shu Chen

Xiaodong Yuan

Rong Sun

Chenyu Zhang

Qiang Huang

Lei Gao

Jianjun Liu

Qun Li

Tiankui Sun

Shuyi Zhuang

Xiaolong Xiao

Ruihuang Liu

Yunlong Jiang

Wei Jun Zhang

Jie Chen

Zhen Wang

Wei Su

Kun Yang

Yang Liu

Wei Zhang

Yang Xu

Peng Li

Qifeng Huang

Yongling Lu

Qiang Wu

Ting Chen

Nan Yao

Jianhua Qin

Ziquan Liu

Guojiang Zhang

Jun Jia

Chengbo Hu

Hongze Li

Xueqiong Zhu

Xin Fang

Hui Fu

Jingying Cao

Liguo Liu

Xiao Tan

Chenying Li

Libin Hu

Yongfei Liu

Hanyan Xiao

Shan Gao

Hongtao Li

Shaobo Chen

Jingtan Ma

Ke Zhao

Zhaohui Zhang

Yujie Li

Tianxin Zhuang

Xuefeng Ge

Huiyu Miao

Jiahao Guo

Chenqing Wang

Xinyao Si

Qi Zhou

Ye Chen

Hai Xue

Yijun Fei

Rushan Wang

Disclosed is an electrical topology of an integrated DC charging station and an operation control method. The electrical topology comprises a supply side DC bus, K discrete charging pile units and a mutual aid total DC bus; each charging pile unit comprises an input DC bus, a mutual aid sub-DC bus, an output DC bus, N isolation branches, a non-isolation DC/DC module and an output terminal, the input DC bus is connected to the supply side DC bus, and the mutual aid sub-DC bus of each charging pile unit is connected to the mutual aid total DC bus; the isolation branch comprises an output branch and a mutual aid branch; and when all the output branches of one charging pile unit are started and the output power cannot meet the required power, the mutual aid branches of other charging pile units are started to meet the required power.

Electrical topology of integrated dc charging station and operation control method thereof

A device for simulating high-frequency current propagation of partial discharge of a GIL/GIS is disclosed. The device comprises a casing, a busbar cavity, an adjustable impedor, a first metal support, a second metal support, a third metal support, and a high-frequency current sensor. The first metal support and the second metal support are separated by an insulating support, the third metal support has an end connected to the second metal support, as well as an end connected to a grounding grid, and the adjustable impedor is formed by an adjustable resistor and an adjustable inductor which are connected in series, and is connected in series between the first metal support and the second metal support through a wire. In the application, the adjustable impedor is connected in series to the metal supports at the grounding point to obtain an impedance equivalent to that of a long-distance GIL/GIS housing.

Device for simulating high-frequency current propagation of partial discharge of GIL/GIS

Disclosed are a device and method for detecting defects of a high-voltage cable cross-bonded grounding system. The method selects a protective grounding box of a cross-bonded grounding system, respectively connects a signal excitation coupler to A-phase, B-phase and C-phase coaxial cables of the protective grounding box, selects a stable signal with a frequency different from a power frequency or a field interference frequency, and tests effective current values and phases responded by the A-phase, B-phase and C-phase coaxial cables when the stable signal with the frequency F1 is injected into the A-phase, B-phase and C-phase coaxial cables of the protective grounding box; and obtains resistances and inductances of branch circuits of the cable cross-bonded grounding system by calculation according to measurement data, and determines if the cable cross-bonded grounding system has a connection defect.

Device and method for detecting defects of high-voltage cable cross-bonded grounding system

A micro-power wind-solar hybrid energy harvesting and power generating device including a solar power generation module, a wind power generation module, a control module, an energy storage module, and an accessory structure are provided. The solar power generation module is mainly composed of a solar thin film cell and a corresponding interface control circuit, and the wind power generation module includes a wind-induced vibration structure, a cantilever beam structure, a piezoelectric element, and a corresponding interface control circuit. The solar thin film cell is mounted at a top of the wind-induced vibration structure, and interface control circuits, the energy storage module, etc. are all arranged inside the wind-induced vibration structure. The control module is configured to handle an energy harvesting and power generating algorithm of the wind-solar hybrid power generating device to maximize the power generation quality and the power generation efficiency of the device.

Micro-power wind-solar hybrid energy harvesting and power generating device, and energy harvesting method

The present invention discloses a method and apparatus for photovoltaic DC direct-fed power generation based on controllable power supply. According to the present invention, the photovoltaic cells are directly connected to the DC microgrid, and the DC bus voltage is flexibly regulated by the controllable power supply in the DC microgrid to enable the photovoltaic cells to operate at the maximum power, thus eliminating the need for a DC interface converter when the photovoltaic cells are connected to the DC bus and reducing the cost and size of the distributed PV power generation system.

Method and apparatus for photovoltaic DC direct-fed power generation

A combined platform for testing fireproof materials for cables includes a main frame for providing operating space; an air circulation system including a fresh air supply unit for supplying fresh air into the operating space and an exhaust gas treatment unit for treating the gas in the operating space under set conditions; an open flame system for providing an open flame for testing cables; a water circulation system for supplying water at least to the exhaust gas treatment unit and the operating space; and a control system for collecting at least the temperature and gas concentration in the operating space, and performing process control based on the collected results. The actual working conditions of scenarios such as fire-resistant cable tunnels and fire-resistant cable trenches can be simulated, and multiple tests such as combustion performance test and physical and chemical performance test can be carried out under various working conditions.

Combined platform for testing fireproof materials for cables

Disclosed is a low-voltage DC power distribution fast switching device. The device includes a positive output terminal electrically connected to a positive pole of a load, and no less than two switching circuits connected in parallel with each other; the switching circuit includes a positive input terminal electrically connected to a positive pole of common negative power supplies, a supplementary diode cluster composed of no less than one diode connected in series, and a thyristor connected between the positive input terminal and the positive output terminal; the positive input terminal is electrically connected to an anode of the supplementary diode cluster and an anode of the thyristor, and the positive output terminal is electrically connected to a cathode of the complementary diode cluster and a cathode of the thyristor.

Low-voltage DC power distribution fast switching device

Disclosed is a fault current controller for a direct current power grid, which includes a primary circuit and a controller. The primary circuit includes an inductor, a filter capacitor, a resistor, an IGBT switch, a diode, a contactor and a Hall current sensor. The inductor, a first resistor and a second contactor are connected in series and are connected to a first contactor in parallel. A first branch including a second resistor and a first diode, a second branch including a third resistor and a second diode, and the inductor are connected in parallel; the filter capacitor, the IGBT switch and the first resistor are connected in parallel. The Hall current sensor is arranged in the series circuit. The controller controls the IGBT switch and the two contactors in the primary circuit to form different on-off combinations.

Fault current controller for a direct current power grid

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Jiangsu, China

Jinggang Yang