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1. 发明公开

EP3531532A1 METHOD FOR CHARGING SUB-MODULE BASED HYBRID CONVERTER 审中-公开
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
申请人： NR Electric Co., Ltd. , NR Electric Engineering Co., Ltd.
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.

2. 发明公开

EP3113311A1 DIRECT-CURRENT TRANSMISSION PROTECTION APPARATUS, CURRENT CONVERTER, AND PROTECTION METHOD 审中-公开
标题翻译： GLEICHSTROMÜBERTRAGUNGSSCHUTZVORRICHTUNG，STROMWANDLER UND SCHUTZVERFAHREN
公开(公告)号：EP3113311A1
公开(公告)日：2017-01-04
申请号：EP14883640.6
申请日：2014-05-04
申请人： NR Electric Co., Ltd. , NR Electric Engineering Co., Ltd.
发明人： CAO, Dongming , XIE, Yeyuan , SHAO, Zhenxia , LU, Yu , LI, Min , LU, Haibin , LI, Haiying
IPC分类号： H02H3/087
CPC分类号： H02H3/202 , H02H7/10 , H02H7/1227 , H02H7/1252 , H02H7/1257 , H02H7/127 , H02M1/32 , H02M7/2173 , H02M2007/4835 , H05K7/20927
摘要： The present invention discloses a direct-current power transmission protection device, including a resistor unit and a bidirectional circulation current switch unit, and the resistor unit and the bidirectional circulation current switch unit being connected in parallel to form the protection device, where at least one resistor is cascaded to form the resistor unit, and at least one bidirectional circulation current switch is cascaded to form the bidirectional circulation current switch unit. In addition, the present invention also provides a converter including the protection device, and at least one protection device is connected in series in each phase unit. The present invention provides the protection device, the converter and a protection method for flexible direct-current power transmission, which can rapidly and effectively suppress direct-current short circuit current and damp current oscillation, and not only can better protect equipment safety, but also can greatly shorten fault current attenuation time, thus shortening direct-current shutdown time and further decreasing economic loss and system destabilization risk caused by shutdown to the max. Moreover, the protection device is structurally simple and low in cost, and has good implementability and economic efficiency.
摘要翻译：本发明公开了一种直流电力传输保护装置，包括电阻单元和双向循环电流开关单元，电阻单元和双向循环电流开关单元并联连接形成保护装置，其中至少一个电阻串联形成电阻器单元，并且至少一个双向循环电流开关级联以形成双向循环电流开关单元。此外，本发明还提供一种包括保护装置的转换器，并且至少一个保护装置在每个相位单元中串联连接。本发明提供了保护装置，转换器和柔性直流输电的保护方法，可以快速有效地抑制直流短路电流和潮流振荡，不仅可以更好地保护设备的安全性，而且还可以可以大大缩短故障电流衰减时间，从而缩短直流关断时间，进一步降低关闭到最大时的经济损失和系统不稳定风险。此外，保护装置的结构简单，成本低，具有良好的可实施性和经济效益。

3. 发明授权

EP3125394B1 UNIFIED POWER FLOW CONTROLLER FOR DOUBLE-CIRCUIT LINE 有权
公开(公告)号：EP3125394B1
公开(公告)日：2019-08-07
申请号：EP15796511.2
申请日：2015-01-12
申请人： NR Electric Co., Ltd. , NR Electric Engineering Co., Ltd.
发明人： TIAN, Jie , LI, Haiying , WANG, Xinbao , DONG, Yunlong , SHEN, Quanrong , PAN, Lei , LIU, Chao , CHANG, Baoli
IPC分类号： H02J3/16 , H02J3/18

4. 发明公开

EP3157122A1 LINE POWER CONTROL METHOD AND SYSTEM OF UNIFIED POWER FLOW CONTROLLER 审中-公开
标题翻译： LEITUNGSSTROMSTEUERUNGSVERFAHREN UND -SYSTEM EINES VEREINHEITLICHTEN STROMFLUSSREGLERS
公开(公告)号：EP3157122A1
公开(公告)日：2017-04-19
申请号：EP15819677.4
申请日：2015-01-22
申请人： NR Electric Co., Ltd. , NR Electric Engineering Co., Ltd.
发明人： TIAN, Jie , PAN, Lei , LIU, Chao , SHEN, Quanrong , LI, Haiying , LU, Yu , DONG, Yunlong
IPC分类号： H02J3/24
CPC分类号： G05B15/02 , H02J3/24 , H02J13/00
摘要： The present invention provides a line power control method and system for a unified power flow controller. The line power control method for a unified power flow controller includes outer loop line power control, inner loop valve side current control, and converter valve control. Series-side converter valve side current reference values I sedref and I seqref are calculated by means of the outer loop line power control according to line power instructions P ref and Q ref that are input, a measured line power U L , and measured line power P line and Q line ; a converter output voltage reference value U cref is calculated by means of the inner valve side current control according to the valve side current reference values that are output by means of the outer loop power control, a measured valve side current, and a measured valve side voltage; and finally, a converter outputs, according to the voltage reference value, a corresponding voltage to control line power to achieve a reference value. The control method is simple and practical, has high reliability, can rapidly and accurately control the line power, and can implement independent decoupling control of active power and reactive power of a line.
摘要翻译：本发明提供了一种用于统一功率流量控制器的线路功率控制方法和系统。统一动力流量控制器的线路功率控制方法包括外环线路功率控制，内循环阀侧电流控制和转换阀控制。串联侧转换器阀侧电流参考值I sedref和I seqref通过根据输入的线路功率指令P ref和Q ref，测量线路功率UL和测量线路功率P的外部线路功率控制来计算线和Q线; 根据通过外环功率控制输出的阀侧电流参考值，测量的阀侧电流和测量的阀侧，通过内阀侧电流控制来计算转换器输出电压基准值U cref 电压; 最后，一个转换器根据电压参考值输出一个相应的电压来控制线路功率，达到一个参考值。控制方法简单实用，可靠性高，可以快速，准确地控制线路功率，并可实现线路有功功率和无功功率的独立去耦控制。

5. 发明公开

EP3125394A1 UNIFIED POWER FLOW CONTROLLER FOR DOUBLE-CIRCUIT LINE 有权
标题翻译： UNIFORM潮流控制器的双回线
公开(公告)号：EP3125394A1
公开(公告)日：2017-02-01
申请号：EP15796511.2
申请日：2015-01-12
申请人： NR Electric Co., Ltd. , NR Electric Engineering Co., Ltd.
发明人： TIAN, Jie , LI, Haiying , WANG, Xinbao , DONG, Yunlong , SHEN, Quanrong , PAN, Lei , LIU, Chao , CHANG, Baoli
IPC分类号： H02J3/00
CPC分类号： H02J3/14 , H02J3/16 , H02J3/1814 , H02J3/46 , Y02E40/18
摘要： An unified power flow controller for a double-circuit transmission line comprises at least one parallel-connection transformer (1), three current converters (4), at least two series-connection transformers (8), a parallel-connection side switching circuit (3), a series-connection side switching circuit (6) and a direct current common bus (5). At least one side of the series-connection transformers is connected with at least one group of by-pass switches (9, 10) in parallel. The alternating current sides of the three current converters are connected to each loop line in series after being connected with at least one series-connection transformer through the series-connection side switching circuit (6). The alternating current sides of the three current converters are connected to an alternating current system after connected with at least one parallel-connection transformer (1) through a parallel-connection side switching circuit starting circuit (2). The direct current sides of the three current converters are connected to the direct current common bus (5) through a transfer switch. With the unified power flow controller, various operating modes can be realized, and when one current converter is in fault, power flow control of the double-circuit transmission line can still be achieved. The unified power flow controller is small in occupied space, low in cost, and excellent in economy, flexibility and reliability.

6. 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.

7. 发明公开

EP4290721A1 METHOD AND APPARATUS FOR HANDLING DIRECT-CURRENT SIDE LINE FAULT OF VOLTAGE SOURCE CONVERTER 审中-实审
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
申请人： NR ELECTRIC CO., LTD. , NR Engineering Co., Ltd.
发明人： LU, Jiang , DONG, Yunlong , YU, Xiang , YANG, Jianming , WANG, Yangzheng , LU, Yu , TIAN, Jie , LI, Haiying , QIU, Defeng , HUANG, Ruhai
IPC分类号： H02H7/26 , H02J3/36
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.

8. 发明公开

EP4227692A1 MODULAR BATCH ENERGY ACQUISITION AND COMMUTATION CIRCUIT AND CONTROL METHOD 审中-实审
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
申请人： NR ELECTRIC CO., LTD. , NR Engineering Co., Ltd.
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
IPC分类号： G01R31/14 , G01R31/52
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.

9. 发明公开

EP3872944A1 DIRECT CURRENT ENERGY DISSIPATION APPARATUS AND CONTROL METHOD THEREFOR 审中-实审
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
申请人： NR ELECTRIC CO., LTD. , NR Engineering Co., Ltd.
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.

10. 发明公开

EP3823147A1 BIPOLAR BIDIRECTIONAL DIRECT CURRENT CONVERTER, AND CONTROL METHOD AND CONTROL DEVICE THEREFOR 审中-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
申请人： NR ELECTRIC CO., LTD. , NR Engineering Co., Ltd.
发明人： YANG, Chen , ZHANG, Zhongfeng , TIAN, Jie , XIE, Yeyuan , LI, Haiying , WANG, Yu , GE, Jian
IPC分类号： H02M3/158 , H02M7/797 , H02M1/32
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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