公开(公告)号：EP3139462A4

公开(公告)日：2017-07-19

申请号：EP15785909

申请日：2015-01-08

申请人： NR ELECTRIC CO LTD ,  NR ELECTRIC ENG CO LTD

发明人： ZHANG QIXUE ,  XU BAOLI ,  ZHANG JIE ,  LI HUAZHONG ,  JI YAOYAO ,  ZHONG SHOUPING ,  WANG GUANG ,  CHEN JUN ,  YAN WEI

IPC分类号： H02H7/22 ,  H02H3/04 ,  H02H3/52 ,  H02H7/06 ,  H02H7/26 ,  H02J1/02 ,  H02J3/01 ,  H02J3/24 ,  H02J3/36

CPC分类号： H02H7/20 ,  H02H3/04 ,  H02H3/52 ,  H02H7/042 ,  H02H7/06 ,  H02H7/16 ,  H02H7/267 ,  H02H7/268 ,  H02J1/02 ,  H02J3/01 ,  H02J3/24 ,  H02J3/36 ,  H02J2003/365 ,  Y02E40/40 ,  Y02E60/60

摘要： A relay protection method against LC parallel circuit detuning faults comprises the steps of: a relay protection device samples a current of a parallel LC, that is, a reactor and a capacitor, and samples a total current flowing through the whole LC; convert the current of the reactor into a current of an equivalent capacitor; calculate amplitudes of the current of the equivalent capacitor and a current of a realistic capacitor and calculate an amplitude of the total current flowing through the LC; calculate a current amplitude ratio of the equivalent capacitor to the realistic capacitor; and when the amplitude of the total current flowing through the LC is large enough, send an alarm signal or a trip after a setting time delay if the current ratio exceeds a preset upper and lower limit range. Also provided is a corresponding relay protection device. The relay protection method and device against LC parallel circuit detuning faults can improve stability of calculation results of a current ratio and raise sensitivity and rapidity of protection.

摘要翻译： 一种针对LC并联电路失谐故障的继电保护方法，包括以下步骤：继电保护装置对并联LC电流即电抗器和电容进行采样，并对流经整个LC的总电流进行采样; 将电抗器的电流转换为等效电容器的电流; 计算等效电容器的电流幅度和实际电容器的电流，并计算流过LC的总电流的幅度; 计算等效电容器与实际电容器的电流幅度比; 当流经LC的总电流幅值足够大时，如果电流比超过预设的上限和下限范围，则发出报警信号或经过设定时间延迟后跳闸。 还提供了相应的继电保护装置。 针对LC并联电路失谐故障的继电保护方法和装置，可以提高电流比计算结果的稳定性，提高保护灵敏度和快速性。

公开(公告)号：EP3062232A4

公开(公告)日：2017-06-28

申请号：EP14872661

申请日：2014-11-12

申请人： NR ELECTRIC CO LTD ,  NR ELECTRIC ENG CO LTD

发明人： FENG YADONG ,  ZHOU QIANG ,  XU DONGFANG ,  YUAN TAO ,  ZHAO TIANEN ,  LI GUANGHUA ,  WEN JIFENG ,  CHEN HONGJUN ,  LIU KEJIN

IPC分类号： G06F15/163 ,  G06F17/50

CPC分类号： G06F13/362 ,  G06F13/4282 ,  G06F15/17

摘要： The present invention discloses a signal name based method for automatic signal exchange between multiple embedded CPU boards, including the following steps: dividing CPU boards into master board and slave board, where during an initialization phase, each slave board sends signal registration information to the master board; after the master board collects the signal registration information of all the slave boards, reading, from a configuration file, an exchange relationship between an output signal and an input signal that is represented by a connection line between signal names, calculating and allocating a data bus address to which the output signal and the input signal are mapped, and sending memory addresses, data types, and bus addresses of signals to each slave board; after a slave board receives the memory addresses, the data types, and the bus addresses of the signals from the master board, saving same as output signal tables and input signal tables; and during an operation phase, writing, by a signal sender, a value of an output signal into a corresponding bus address according to the output signal tables, and reading, by a receiver, a value of an input signal from a corresponding bus address according to the input signal tables. With this method, signal exchange between CPU boards may be intuitively and simply adjusted, and the correctness of signal exchange is ensured. The present invention further provides an apparatus for implementing automatic signal exchange.

摘要翻译： 本发明公开了一种基于信号名称的多个嵌入式CPU板之间自动信号交换的方法，包括以下步骤：将CPU板划分为主板和从板，在初始化阶段，每个从板向主板发送信号注册信息 板; 在主板收集到所有从板的信号注册信息后，从配置文件中读取输出信号与信号名称之间的连线所代表的输入信号的交换关系，计算并分配数据总线 输出信号和输入信号映射到的地址，并且将信号的存储器地址，数据类型和总线地址发送到每个从板; 从板接收到主板信号的内存地址，数据类型和总线地址后，保存为输出信号表和输入信号表; 在运行阶段，根据输出信号表，由信号发送器将输出信号的值写入对应的总线地址，并由接收器从相应的总线地址读取输入信号的值 到输入信号表。 采用这种方法，可以直观简单地调整CPU板之间的信号交换，保证信号交换的正确性。 本发明还提供了一种实现自动信号交换的装置。

公开(公告)号：EP3157122A4

公开(公告)日：2017-07-26

申请号：EP15819677

申请日：2015-01-22

申请人： NR ELECTRIC CO LTD ,  NR ELECTRIC ENG 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： 本发明提供一种统一潮流控制器的线路功率控制方法和系统。 统一潮流控制器的线路功率控制方法包括外环线功率控制，内环线阀侧电流控制和换流阀控制。 根据输入的线路功率指令P ref和Q ref，测量的线路功率UL和测量的线路功率P，通过外部环路线路功率控制来计算串联侧转换器阀门侧电流基准值I sedref和I seqref 线和Q线; 根据借助于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，通过内侧阀侧电流控制来计算转换器输出电压参考值U cref 电压; 最后，转换器根据电压参考值输出对应的电压，以控制线路功率达到参考值。 该控制方法简单实用，可靠性高，能够快速，准确地控制线路功率，并可实现线路有功和无功的独立解耦控制。

公开(公告)号：EP3082212A4

公开(公告)日：2017-01-18

申请号：EP15796911

申请日：2015-01-22

申请人： NR ELECTRIC CO LTD ,  NR ELECTRIC ENG CO LTD

发明人： HU MING ,  SHAO ZHENXIA ,  JIAO XINYAN ,  TIAN JIE ,  LU YU ,  SHEN GANG

IPC分类号： H02J3/36 ,  H02M5/458

CPC分类号： H02J3/36 ,  H02M5/4585 ,  Y02E60/60

摘要： The present invention discloses a tripolar VSC-HVDC system and method, wherein a rectifier and an inverter consist of a three-phase six-bridge arms modular multilevel converter (MMC) respectively, and two converter valves are arranged on the DC side of the rectifier and inverter respectively, the midpoint of upper and lower converter valves of the rectifier and inverter are connected with a pole 3 DC line by a smoothing reactor, triggering of the upper and lower converter valves is controlled to change the DC voltage polarity of the pole 3 periodically, and tripolar DC transmission is realized by modulating current orders of the three poles. The technical solution provided by the invention can make full use of the three conductors for power transmission, has the characteristics of small occupied space of the converter station, low total conversion cost and high reliability, and it is particularly suitable for the implementation of conversion an AC line to a DC line for capacity increasing in large-sized urban power supply systems lacking in land resources.

公开(公告)号：EP3125394A4

公开(公告)日：2017-04-26

申请号：EP15796511

申请日：2015-01-12

申请人： NR ELECTRIC CO LTD ,  NR ELECTRIC ENG 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： H02J3/18

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.

摘要翻译： 一种用于双回路传输线的统一潮流控制器包括至少一个并联变压器（1），三个电流转换器（4），至少两个串联变压器（8），并联连接侧开关电路 3），串联侧开关电路（6）和直流公共母线（5）。 串联变压器的至少一侧并联至少一组旁路开关（9,10）。 三个电流变换器的交流侧通过串联侧切换电路（6）与至少一个串联连接的变压器相连后，串联在每个环路线上。 三个电流转换器的交流侧通过并联连接侧开关电路启动电路（2）与至少一个并联变压器（1）连接后，连接交流电系统。 三个电流转换器的直流侧通过转换开关连接到直流公共母线（5）。 通过统一的功率流量控制器，可以实现各种工作模式，当一个变流器出现故障时，仍然可以实现双回线路的功率控制。 统一的功率流量控制器占用空间小，成本低，经济性，灵活性和可靠性好。

公开(公告)号：EP3113311A4

公开(公告)日：2017-10-04

申请号：EP14883640

申请日：2014-05-04

申请人： NR ELECTRIC CO LTD ,  NR ELECTRIC ENG 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 ,  H02H7/10 ,  H02H7/122 ,  H02H7/125 ,  H02H7/127 ,  H02M1/32 ,  H02M7/217 ,  H02M7/483 ,  H05K7/20

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输电保护装置，包括电阻单元和双向环流开关单元，所述电阻单元和所述双向环流开关单元并联连接形成保护装置，其中至少一个 电阻串联形成电阻单元，至少一个双向环流开关级联形成双向环流开关单元。 此外，本发明还提供一种包括保护装置的转换器，并且每个相位单元中至少一个保护装置串联连接。 本发明提供了一种能够快速有效抑制直流短路电流和潮湿电流振荡的柔性直流输电保护装置，变流器及保护方法，不仅能够更好地保护设备的安全，而且 可以大大缩短故障电流衰减时间，缩短直流关机时间，进一步降低关机造成的经济损失和系统失稳风险。 而且，该保护装置结构简单，成本低廉，具有良好的可实施性和经济性。

公开(公告)号：EP3136534A4

公开(公告)日：2017-05-10

申请号：EP15815487

申请日：2015-01-22

申请人： NR ELECTRIC CO LTD ,  NR ELECTRIC ENG CO LTD

发明人： ZHAO WENQIANG ,  LI LIN ,  WANG YONGPING

IPC分类号： H02J3/36

CPC分类号： H02M3/24 ,  H02J3/36 ,  H02M5/42 ,  H02M5/45 ,  H02M5/451 ,  H02M5/458 ,  H02M7/7575 ,  Y02E60/60

摘要： The invention discloses a high voltage/ultrahigh voltage direct current transmission inverter side frequency control implementing method, comprising the following steps: transmitting a deviation between the inverter side power grid frequency and rated frequency to the inverter side frequency controller, wherein the frequency controller regulates and outputs a modulation quantity by adopting self-adaptive parameters according to different operation conditions; when the interstation communication is normal, the modulation quantity output of the inverter side frequency controller causes the rectifier side and the inverter side to form a new power/current order through the interstation communication, thus realizing the inverter side frequency control by changing the size of the transmission power; when the interstation communication is abnormal, converting the inverter side to current control from voltage control and converting the rectifier side to voltage control from current control; superposing the modulation quantity output of the inverter side frequency controller to the power/current order of the inverter side, changing the size of the transmission power to realizing the inverter side frequency control. The method realizes the fast efficient regulation function on the inverter side frequency, and effectively solves the problem of the inverter side frequency control for the interstation communication failure.

摘要翻译： 本发明公开了一种高压/超高压直流输电逆变器侧频率控制实施方法，包括以下步骤：将逆变器侧电网频率与额定频率之间的偏差传输至逆变器侧频率控制器，其中频率控制器调节并且 根据不同的操作条件采用自适应参数输出调制量; 当站间通信正常时，变频器侧频率控制器的调制量输出使整流器侧和变频器侧通过站间通信形成新的电力/电流指令，从而通过改变变频器侧的频率控制器的大小来实现变频器侧的频率控制。 传输功率; 当站间通信异常时，将逆变器侧从电压控制转换为电流控制，并将整流器侧从电流控制转换为电压控制; 将逆变器侧频率控制器的调制量输出叠加到逆变器侧的功率/电流顺序，改变传输功率的大小以实现逆变器侧频率控制。 该方法实现了对变频器侧频率的快速有效调节功能，有效解决了机组间通讯故障时变频器侧频率控制的问题。