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公开(公告)号：EP4372949A1
公开(公告)日：2024-05-22
申请号：EP22914682.4
申请日：2022-12-26
发明人： WANG, Nannan , LU, Yu , DONG, Yunlong , TIAN, Jie , ZHAN, Changjiang , LI, Haiying , LI, Gang , WANG, Xianrong , LIN, Yizhe , LI, Jianchun
IPC分类号： H02J3/38
摘要： The present application provides a converter control system and method for controlling a converter to mimic a synchronous generator. The converter control system comprises a power synchronization control unit, an alternating voltage reference vector calculation unit and an alternating voltage command generation unit. The power synchronization control unit is configured to mimic simulating a speed controller and a mechanical inertia link of a synchronous generator to generate a reference phase; the alternating voltage reference vector calculation unit acquires an internal potential vector and an alternating voltage vector to generate an alternating voltage reference vector; and the alternating voltage command generation unit generates a three-phase alternating voltage control command according to the alternating voltage reference vector and the reference phase. The converter control system and method provided by the present application can reduce the risk of oscillations without using current closed-loop control under steady-state and small perturbation conditions, and mimic grid support characteristics consistent with synchronous generators in both a steady state and a transient state, while realizing active adjustment of the impedance of the converter and improving grid adaptability.
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公开(公告)号：EP4362456A1
公开(公告)日：2024-05-01
申请号：EP23825364.5
申请日：2023-08-16
申请人： State Grid Corporation of China , State Grid Economic and Technological Research Institute Co., Ltd , NR Electric Co., Ltd. , XJ Group Corporation , Nari Technology Co. Ltd , Beijing SGITG Accenture Information Technology Center Co., Ltd. , Huawei Technologies Co., Ltd.
发明人： JIN, Wei , WANG, Qing , GUO, Xianshan , LYU, Jun , LIU, Siyuan , ZHANG, Xiang , WANG, Yanguo , ZHANG, Zhanguo , WANG, Haifeng , TONG, Chong , LI, Ming , CHENG, Wei , ZHAO, Ning , CHEN, Zhou , HOU, Xiaojun , ZHAO, Hanqing
IPC分类号： H04N7/18
摘要： The application discloses a monitoring system and method based on a digital converter station, and the monitoring system includes a first monitoring terminal deployed at a first-level monitoring side, a second monitoring terminal deployed at a second-level monitoring side, and a third monitoring terminal deployed at a third-level monitoring side; the monitoring terminal at each level includes a communication module, a human-machine interaction module, a device status monitoring module, a device alarm management module, a video fusion processing module, and a data transmission adjustment and control module. The video fusion processing module is deployed at the monitoring terminal at each level respectively, so that the monitoring terminal at each level may respond locally to a monitoring retrieval request of a user at each level, it is unnecessary for the station side to respond to the monitoring retrieval request of the user at each level completely, the user may directly view video fusion images locally without retrieving the images from a remote end, so that on the premise of limited network bandwidth resources, network delay may be effectively reduced, real-time performance of displaying video images may be improved, and usage effect and user experience of the video fusion application may be improved.
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3.发明公开
公开(公告)号：EP4290721A1
公开(公告)日：2023-12-13
申请号：EP22749146.1
申请日：2022-01-29
发明人： LU, Jiang , DONG, Yunlong , YU, Xiang , YANG, Jianming , WANG, Yangzheng , LU, Yu , TIAN, Jie , LI, Haiying , QIU, Defeng , HUANG, Ruhai
摘要： The invention provide a method and device for handling a DC-side line fault of a voltage source converter, wherein the voltage source converter is arranged at a rectifier end or an inverter end of any DC pole of a DC transmission system, and the rectifier end and the inverter end are connected through a DC line. The fault handling method comprises: acquiring a normal value of a DC voltage reference value of the voltage source converter; setting a DC current limiting target value of the voltage source converter; acquiring a DC current limiting control output value based on a DC current measured value and the DC current limiting target value; setting a DC voltage reference value of the voltage source converter based on the normal value of the DC voltage reference value and the DC current limiting control output value; setting the DC current limiting target value to be zero when a DC side line fault is detected; and rising the DC voltage reference value of the voltage source converter in response to end of de-ionization, and changing the DC current limit target value of the voltage source converter.
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4.发明公开
公开(公告)号：EP4254701A1
公开(公告)日：2023-10-04
申请号：EP22762461.6
申请日：2022-02-28
发明人： FANG, Taixun , XIE, Yeyuan , YANG, Bing , LV, Wei , WANG, Wenjie , XU, Yuanzhen , CHEN, Yu , SUN, Chao
IPC分类号： H02H7/26
摘要： Disclosed are a multi-port hybrid direct current circuit breaker and a control method thereof. The circuit breaker includes at least two through-flow branches, at least two reversing branches and a breaking branch; each through-flow branch includes a first rapid mechanical switch and a one-way commutation switch which are connected in series; one ends of the through-flow branches are interconnected to form a direct current bus; each reversing branch includes a diode upper bridge arm and a diode lower bridge arm which are connected in series in the same direction; the other end of each through-flow branch is correspondingly connected to an intermediate point of each reversing branch to form a port; the breaking branch includes a one-way breaking switch and a nonlinear resistor which are connected in parallel; the breaking branch and the reversing branches are connected in parallel to form a first common bus and a second common bus.
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公开(公告)号：EP4227692A1
公开(公告)日：2023-08-16
申请号：EP22739003.6
申请日：2022-01-11
发明人： XIE, Yeyuan , WANG, Yu , YAO, Hongyang , JIANG, Tiangui , ZHU, Minglian , OUYANG, Youpeng , HU, Zhaoqing , LI, Haiying , YIN, Guanxian , DUAN, Jun , REN, Tieqiang
摘要： Disclosed are a modular converter circuit featuring batch energy harvesting, and a control method. The modular converter circuit featuring batch energy harvesting comprises a batch energy harvesting unit and N sub-modules, wherein AC terminals of the N sub-modules are connected in series, and N is an integer greater than or equal to 2. The sub-module comprises: a power unit (1) comprising a power semiconductor device, an AC terminal of the power unit (1) being led out as the AC terminal of the sub-module; and a capacitor unit (2) connected in parallel with the power unit (1). The batch energy harvesting unit comprises: a first energy harvesting power supply (6), a negative electrode of the first energy harvesting power supply (6) being connected with a negative electrode of the capacitor unit (2) of a head-end sub-module among the N sub-modules or connected therewith through a current limiting unit; and a connection network (30), an input terminal of the connection network (30) being directly connected with a positive electrode of the first energy harvesting power supply (6) or connected therewith through a current limiting unit, and N output terminals of the connection network (30) being respectively connected with positive electrodes of the capacitor units (2) or connected therewith through current limiting units.
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公开(公告)号：EP3872944A1
公开(公告)日：2021-09-01
申请号：EP19875448.3
申请日：2019-03-04
发明人： XIE, Yeyuan , JIANG, Tiangui , LI, Haiying
IPC分类号： H02H9/04
摘要： Provided by the present application are a direct current energy dissipation apparatus and a control method therefor. The direct current energy dissipation apparatus comprises at least one energy consumption unit, comprising at least two voltage-sharing energy dissipation modules connected in series in the same direction; the voltage-sharing energy dissipation modules comprise direct current capacitor branches and energy dissipation branches that are connected in parallel, and the energy dissipation branches comprise first power semiconductor devices and energy dissipation resistors that are connected in series; and the direct current capacitor branches comprise direct current capacitors.
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7.发明公开
公开(公告)号：EP3823147A1
公开(公告)日：2021-05-19
申请号：EP19852160.1
申请日：2019-08-15
发明人： YANG, Chen , ZHANG, Zhongfeng , TIAN, Jie , XIE, Yeyuan , LI, Haiying , WANG, Yu , GE, Jian
摘要： A bipolar bidirectional DC converter, and a control method and a control device therefor. The bipolar bidirectional DC converter comprises at least two valve group series (101, 102) and at least six magnetic elements (103), and said valve group series are divided into a Type-I valve group series (102) and a Type-II valve group series (101) according to the connection relationship between the valve group series (101, 102) and a low-voltage side port of the bidirectional DC converter; a positive electrode of a low-voltage DC port of the Type-I valve group series (102) forms a positive electrode of the low-voltage side port of the bipolar bidirectional DC converter; a positive electrode of a low-voltage DC port of the Type-II valve group series (101) is connected to a negative electrode of the low-voltage DC port of the Type- I valve group series (102) and forms a neutral point of the low-voltage side port of the bipolar bidirectional DC converter, and a negative electrode of the low-voltage DC port of the Type-II valve group series (101) forms a negative electrode of the low-voltage side port of the bipolar bidirectional DC converter; each valve group series (101, 102) comprises a high-voltage DC port, a low-voltage DC port and at least three AC ports, and each AC port is connected to a magnetic element (103); and the other ends of the magnetic elements (103), which are connected to all the AC ports in the same valve group series (101, 102), are connected.
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公开(公告)号：EP3537556A3
公开(公告)日：2019-11-13
申请号：EP19171554.9
申请日：2017-04-25
发明人： Li, Gang , Lu, Yu , Hu, Zhaoqing , Tian, Jie , Dong, Yunlong , Jiang, Tiangui , Li, Haiying , Feng, Yadong , Wang, Ke , Lu, Jiang , Sui, Shunke , Wang, Hui , Wang, Nannan
摘要： The present invention relates to a method and system for fault positioning and recovery of a voltage source converter. The method comprises: locking a converter station when it is detected that an alternating-current voltage contains a zero sequence voltage or a direct-current voltage contains an unbalanced voltage; positioning a fault by continuing to detect the zero sequence voltage of an alternating-current side of the converter; and recovering the operation of each station after the fault is positioned. The method for fault positioning and recovery is simple and practical, has high reliability and can effectively detect the problems that each station contains a zero sequence voltage of an alternating-current side and cannot easily position a fault caused due to the fact that the zero sequence voltage of the alternating-current side is transmitted by a voltage source converter to an opposite-side alternating-current system; meanwhile, by means of the recovery method, a non-faulty converter station can get rid of the influences of a faulty converter station for rapid recovery, rapid recovery based on a voltage source converter station system is implemented, and the application of a transformerless wiring method in the voltage source converter can be promoted, thereby finally achieving that the occupied space of a converter station is reduced, losses are reduced, and manufacture costs are reduced.
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公开(公告)号：EP3531532A1
公开(公告)日：2019-08-28
申请号：EP18739444.0
申请日：2018-01-12
发明人： DING, Jiudong , LU, Yu , DONG, Yunlong , LI, Haiying , TIAN, Jie , QIU, Defeng , JIANG, Tiangui , LIAN, Jianyang
IPC分类号： H02J7/04
摘要： The present invention discloses a charging method for a sub-module based hybrid converter. By setting a half-controlled charging link of half-blocking all full bridge sub-modules in a charging process, and raising the voltages of half bridge sub-modules to reach the starting point of a half bridge sub-module based self-powered supply in an uncontrolled stage of the half bridge sub-modules, the starting point of the sub-module based self-powered supply is increased, and the design difficulty of the sub-module based self-powered supply is reduced. The present invention also discloses another charging method for a sub-module based hybrid converter. The above objective can also be achieved by setting a half-controlled charging link of bypassing all full bridge sub-modules in the charging process.
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公开(公告)号：EP3232555A1
公开(公告)日：2017-10-18
申请号：EP15866788.1
申请日：2015-10-28
发明人： DING, Jiudong , TIAN, Jie , DONG, Yunlong , LI, Haiying , CAO, Dongming , LIU, Haibin , LU, Yu
IPC分类号： H02M7/00
摘要： A submodule distributed control method, device and system are provided. Submodules of each bridge arm are grouped. Each group corresponds to one valve based controller. An upper-level control device calculates a weight of each group according to a bridge arm current, an average voltage of normal submodules in each group, and the number of the normal submodules in each group; calculates, according to the number of submodules to be input in a corresponding bridge arm, the number of submodules being input in each group and delivers the number to the valve based controller. The valve based controller operates according to a voltage balancing policy and a gating method that are provided in the prior art.
摘要翻译： 提供了一种子模块分布式控制方法，装置和系统。 每个桥臂的子模块被分组。 每个组对应一个阀门控制器。 上层控制装置根据桥臂电流，各组正常子模块的平均电压以及各组正常子模块的数量计算各组的权重; 根据要在相应的桥臂中输入的子模块的数量来计算在每个组中输入的子模块的数量，并将该数量传递给基于阀门的控制器。 基于阀的控制器根据现有技术中提供的电压平衡策略和门控方法进行操作。
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