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1. 发明公开

EP4372949A1 CONVERTER CONTROL SYSTEM AND METHOD 审中-实审
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
申请人： NR Electric Co., Ltd , NR Engineering Co., Ltd.
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
CPC分类号： Y02E60/60 , H02J3/46 , H02J3/38 , H02M1/08
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.

2. 发明授权

EP3145071B1 VOLTAGE-SOURCE MULTI-LEVEL CONVERTER, DIRECT-CURRENT POWER TRANSMISSION SYSTEM AND FAULT PROCESSING METHOD AND DEVICE 有权
公开(公告)号：EP3145071B1
公开(公告)日：2020-04-15
申请号：EP15788904.9
申请日：2015-02-05
申请人： NR Electric Co., Ltd. , NR Engineering Co., Ltd
发明人： SHEN, Guorong , TIAN, Jie , CAO, Dongming , LI, Haiying , DONG, Yunlong , WANG, Nannan , LIU, Haibin , LU, Yu
IPC分类号： H02J3/36 , H02J1/00 , H02M7/483 , H01H9/50

3. 发明授权

EP2999103B1 CONVERTER AND CONTROL METHOD THEREOF 有权转让
公开(公告)号：EP2999103B1
公开(公告)日：2019-08-28
申请号：EP14797222.8
申请日：2014-05-05
申请人： NR Electric Co., Ltd. , NR Engineering Co., Ltd.
发明人： DONG, Yunlong , CAO, Dongming , TIAN, Jie , LI, Haiying , WANG, Nannan
IPC分类号： H02M1/32 , H02M7/483

4. 发明公开

EP3480913A1 SERIES COMPENSATION DEVICE APPLICABLE TO DOUBLE-CIRCUIT LINE 有权
公开(公告)号：EP3480913A1
公开(公告)日：2019-05-08
申请号：EP17841031.2
申请日：2017-08-15
申请人： NR Electric Co., Ltd. , NR Engineering Co., Ltd.
发明人： HUANG, Ruhai , LU, Yu , DONG, Yunlong , PAN, Lei , QIU, Defeng , JIANG, Chongxue , LU, Jiang , LI, Gang , HU, Zhaoqing , WANG, Nannan , DING, Jiudong , WANG, Ke , HU, Xianlai , WANG, Hui , SUI, Shunke
IPC分类号： H02J3/00
摘要： A series compensation device suitable to double-circuit lines is disclosed. The device includes one series transformer and one converter. One converter and dual-circuit transmission lines are respectively connected to three windings of one series transformer. In the solution provided in the present application, the device can be independently installed in a power transmission system to be used as a static synchronous series compensator, and can also be used as a component of a unified power flow controller, a convertible static compensator, an interline power flow controller and a unified power quality conditioner to be connected to a power transmission system device in series. The device can save the capacity of a converter, improve the application efficiency of the series compensation device, and reduce the cost and area occupation.

5. 发明公开

EP4362261A1 CONVERTER CONTROL METHOD AND CONTROL SYSTEM, COMPUTER DEVICE, AND STORAGE MEDIUM 审中-实审
公开(公告)号：EP4362261A1
公开(公告)日：2024-05-01
申请号：EP22848484.6
申请日：2022-07-25
申请人： NR Electric Co., Ltd , NR Engineering Co., Ltd. , NR Electric Power Electronics Co., Ltd.
发明人： WANG, Nannan , TIAN, Jie , LU, Yu , DONG, Yunlong , ZHAN, Changjiang , LI, Haiying , WANG, Xinbao , ZOU, Kaikai , WANG, Xianrong , YIN, Zihan , MA, Xiuda
IPC分类号： H02J3/16 , H02J3/18
CPC分类号： Y02E60/60 , H02J3/40 , H02J3/36 , H02M1/32 , H02M1/00 , H02M7/797 , H02J3/50 , H02J3/16 , H02J3/18
摘要： This application provides a control method and a control system for a converter, and a computer device, applied to a flexible direct-current power transmission system. The flexible direct-current power transmission system includes one or more voltage source converters, and the control method includes: determining an inner potential of the converter, a phase, a grid-side voltage, a grid-side current of the converter, a constant impedance value, and a current limiting value of the converter; calculating a voltage reference value of a connection bus of the converter according to the inner potential, the phase, the constant impedance value, and the grid-side current of the converter; calculating a current instruction reference value according to an error between the voltage reference value of the connection bus and the grid-side voltage; and controlling, according to the current instruction reference value, a current of the converter to follow the current instruction reference value. The control method further includes an overcurrent limiting unit, and when the converter is in an instruction current-limiting mode, a current instruction reference value in the instruction current-limiting mode is calculated according to series inductance characteristics of a positive sequence voltage source and according to the grid-side voltage Us, the inner potential amplitude E, the phase θ, and the current limiting value Imax of the converter, and is used as the current instruction reference value.

6. 发明公开

EP3145071A1 VOLTAGE-SOURCE MULTI-LEVEL CONVERTER, DIRECT-CURRENT POWER TRANSMISSION SYSTEM AND FAULT PROCESSING METHOD AND DEVICE 有权
标题翻译：多电平电压源逆变器，DC输电系统和故障处理方法和装置
公开(公告)号：EP3145071A1
公开(公告)日：2017-03-22
申请号：EP15788904.9
申请日：2015-02-05
申请人： NR Electric Co., Ltd. , NR Engineering Co., Ltd
发明人： SHEN, Guorong , TIAN, Jie , CAO, Dongming , LI, Haiying , DONG, Yunlong , WANG, Nannan , LIU, Haibin , LU, Yu
IPC分类号： H02M7/483 , H02J3/36
CPC分类号： H02J1/00 , H02J3/36 , H02M1/32 , H02M7/483 , H02M2007/4835
摘要： A voltage-source multi-level converter, including a phase unit (0). The phase unit (0) includes a first bridge arm (100) and a second bridge arm (200), where a first terminal of the first bridge arm (100) is a first DC terminal (P) of the phase unit (0), and a first terminal of the second bridge arm (200) is a second DC terminal (N) of the phase unit (0); a second terminal of the first bridge arm (100) and a second terminal of the second bridge arm (200) are shorted together, as an alternating-current terminal (A) of the phase unit (0); the first bridge arm (100) includes first modules (101) and one first reactor (102) connected in series, where a first terminal of the first reactor (102) is connected to the alternating-current terminal (A), a second terminal (X1) thereof is connected to a first terminal of the first modules (101), and a second terminal of the first modules (101) is connected to the first DC terminal (P); the second bridge arm (200) includes second modules (201) and one second reactor (202) connected in series, where a first terminal of the second reactor (202) is connected to the alternating-current terminal (A), a second terminal (X2) thereof is connected to a first terminal of the second modules (201), and a second terminal of the second modules (201) is connected to the second DC terminal (N); and a parallel fault shunt circuit (300) is connected between the second terminals (X1, X2) of the first reactor (102) and the second reactor (202). Also disclosed are a DC power transmission system and a fault processing method and device.
摘要翻译：一种电压源多电平变换器，还包括一个相位单元（0）。相位单元（0）包括：第一桥臂（100）和第二桥臂（200），其中所述第一桥臂（100）的第一端子是相位单元的第一直流端子（P）（0）和第二桥臂（200）的第一端子是相位单元（0）的第二直流端子（N）; 第一桥臂（100）和所述第二桥臂（200）的第二端子的第二端子被短接在一起，如在相位单元（0）的交流端子（A）; 第一桥臂（100）包括串联连接的，其中所述第一反应器（102）的第一端子被连接到交流输出端子（A）第一模块（101）和一个第一反应器（102），第二端子（X1）被连接到所述第一模块（101）的第一端子，并且所述第一模块（101）的第二端子连接到所述第一DC端子（P）; 第二桥臂（200）包括串联连接的，其中所述第二反应器（202）的第一端子被连接到交流输出端子（A）第二模块（201）和一个第二反应器（202），第二端子（X2）被连接到所述第二模块（201）的第一端子，和第二模块（201）的第二端子连接到所述第二DC端子（N）; 和并联故障分流电路（300）被连接在第一反应器（102）和第二反应器（202）的第二端（X1，X2）之间。所以圆盘游离缺失是DC输电系统和故障处理方法及装置。

7. 发明授权

EP3419138B1 METHOD AND SYSTEM FOR FAULT POSITIONING AND RECOVERY OF VOLTAGE SOURCE CONVERTER 有权
公开(公告)号：EP3419138B1
公开(公告)日：2020-10-28
申请号：EP17792434.7
申请日：2017-04-25
申请人： NR Electric Co., Ltd. , NR Engineering Co., Ltd.
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
IPC分类号： H02J3/36 , H02H7/26 , H02H3/06

8. 发明公开

EP3703214A1 CONVERTER CONTROL METHOD AND DEVICE 有权
公开(公告)号：EP3703214A1
公开(公告)日：2020-09-02
申请号：EP18870538.8
申请日：2018-10-23
申请人： NR Electric Co., Ltd. , NR Engineering Co., Ltd.
发明人： WANG, Jiacheng , LU, Yu , WANG, Nannan , HU, Zhaoqing , DONG, Yunlong , LI, Gang , JIANG, Chongxue
IPC分类号： H02J3/38
摘要： The invention relates to an island converter overload limit method and device for a bipolar flexible DC transmission system, and belongs to the field of DC transmission. During stable island operation, both bipolar converters adopt a voltage-frequency droop control strategy; and once it is detected that one converter is overloaded, the control mode of the overloaded converter is automatically switched to active-wattless power control from voltage-frequency droop control to fulfill an overload limit function. The method effectively avoids an overload of the bipolar flexible DC transmission system under island operation, effectively maintains the AC voltage and frequency stable, and has important guiding significance for applying island systems to DC power grids.

9. 发明公开

EP3595116A1 FAULT SWITCH CONFIGURATION AND CLEARING METHOD IN FLEXIBLE DC CONVERTER STATION 有权
公开(公告)号：EP3595116A1
公开(公告)日：2020-01-15
申请号：EP18809522.8
申请日：2018-05-22
申请人： NR Electric Co., Ltd. , NR Engineering Co., Ltd
发明人： LU, Yu , LI, Gang , TIAN, Jie , WANG, Nannan , LI, Haiying , JIANG, Chongxue , SUI, Shunke
IPC分类号： H02H7/26
摘要： A fault switch configuration and clearing method in a flexible DC converter station, the flexible DC converter station is configured with a grid side switch (QF1) and a valve side phase-split switch (QF2) in the converter station. When a fault occurs, a faulty phase and a non-faulty phase are detected and identified by means of differential protection or low voltage overcurrent. An alternating current (AC) zero crossing condition is created by means of firstly turn off the non-faulty phase valve side phase- split switch (QF2) and the grid side switch (QF1), thereby cutting off the faulty phase, disconnecting the connection between a power supply and a fault point, and achieving the clearing for faults. The described fault-clearing method is simple and practical, highly reliable, and connection between the fault point and the power supply is quickly and effectively cut; converter station equipment is effectively protected, and further expansion of the fault is avoided.

10. 发明公开

EP3681006A1 VOLTAGE AND CURRENT CONTROL METHOD AND DEVICE FOR DIRECT-CURRENT POWER TRANSMISSION SYSTEM 有权
公开(公告)号：EP3681006A1
公开(公告)日：2020-07-15
申请号：EP18885604.1
申请日：2018-11-28
申请人： NR Electric Co., Ltd. , NR Engineering Co., Ltd.
发明人： LU, Jiang , LU, Yu , DONG, Yunlong , WANG, Yongping , TIAN, Jie , WANG, Nannan , ZHAO, Wenqiang , HU, Zhaoqing , WANG, Ke , XIAO, Jianmin
IPC分类号： H02J3/36
摘要： Disclosed in the present invention is a voltage and current control method for a direct-current transmission system. The method comprises: calculating a DC voltage reference value of a voltage source converter of a DC voltage control end, on the basis whether a direct-current voltage end of a direct-current pole of a direct-current transmission system substantially controls a direct-current voltage; using 1/2 of the calculated direct-current voltage reference value of the voltage source converter as a bridge arm voltage direct-current bias, calculating a difference between the direct-current voltage reference value of the voltage source converter and a measured direct-current voltage value, and inputting the difference into a direct-current voltage control outer loop of the voltage source converter to perform closed-loop control, so as to control the direct-current voltage or the direct current of the direct-current pole. Correspondingly, also provided is a voltage and current control device for the direct-current transmission system. By the means of the present invention, the direct-current voltage and the direct current of the direct-current transmission system provided with the voltage source converter can be effectively controlled.

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