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    FAULT CURRENT LIMITATION IN DC POWER TRANSMISSION SYSTEMS
    31.
    发明申请
    FAULT CURRENT LIMITATION IN DC POWER TRANSMISSION SYSTEMS 审中-公开
    直流电力传输系统中的故障电流限制

    公开(公告)号：WO2012116738A1

    公开(公告)日：2012-09-07

    申请号：PCT/EP2011/053042

    申请日：2011-03-01

    Applicant: ABB RESEARCH LTD ,  BERGGREN, Bertil ,  NORRGA, Stefan ,  JONSSON, Tomas U

    Inventor： BERGGREN, Bertil ,  NORRGA, Stefan ,  JONSSON, Tomas U

    IPC: H02M1/32 ,  H02J3/36 ,  H02M7/49

    CPC classification number: H02J3/36 ,  H02M1/32 ,  H02M7/49 ,  H02M2007/4835 ,  Y02E60/60

    Abstract: The invention concerns a method, voltage source converter and computer program product for limiting the current in a DC power transmission system. The voltage source converter is provided with an alternating current terminal, a DC terminal and has a phase leg with a phase arm stretching between the alternating current terminal and DC terminal. The phase arm of the voltage source converter comprises a first switching element (Tl) together with an anti-parallel first rectifying element (Dl) and a further switching element (FT) together with anti-parallel further rectifying element (FD), and an overvoltage protecting element (ZA) in parallel with the further switching element. The overvoltage protecting element (ZA) can be connected into a fault current path section stretching in the phase arm between the alternating current terminal and said DC terminal for limiting the current at the DC terminal.

    Abstract translation: 本发明涉及用于限制直流电力传输系统中的电流的方法，电压源转换器和计算机程序产品。 电压源转换器设置有交流端子，直流端子，并且具有在交流端子和直流端子之间延伸的相臂的相支脚。 电压源转换器的相位臂与反并联的另外的整流元件（FD）一起包括第一开关元件（T1）和反并联的第一整流元件（D1）和另一个开关元件（FT），以及 过电压保护元件（ZA）与另一开关元件并联。 过电压保护元件（ZA）可以连接到在交流电流端子和所述直流端子之间的相臂中延伸的故障电流路径部分中，用于限制直流端子处的电流。

    TUNING A POWER OSCILLATION DAMPING UNIT
    32.
    发明申请
    TUNING A POWER OSCILLATION DAMPING UNIT 审中-公开
    调节功率振荡阻尼单元

    公开(公告)号：WO2011061153A3

    公开(公告)日：2012-01-26

    申请号：PCT/EP2010067497

    申请日：2010-11-15

    Applicant: ABB RESEARCH LTD ,  KORBA PETR ,  BERGGREN BERTIL ,  MAJUMDER RAJAT ,  RAY SWAKSHAR

    Inventor： KORBA PETR ,  BERGGREN BERTIL ,  MAJUMDER RAJAT ,  RAY SWAKSHAR

    IPC: H02J3/24

    CPC classification number: H02J3/24

    Abstract: The invention is related to a method, power control device and computer program product for tuning a power oscillation damping unit (22; 26) in a power transmission system,. The power control device (10) includes a probing signal generating element (42) configured to generate at least one probing signal (PS) and send the probing signal into the power transmission system,a data extracting element (36) configured to receive probing signal responses (PSR1, PSR2, PSRn) from measurement units (12, 14, 16) placed in the power transmission system and a system parameter determining element (40) configured to determine system model parameters (SP1; SP2) of the power transmission system based on the probing signal and the probing signal responses and tune the power oscillation damping unit using the system model parameters.

    Abstract translation: 本发明涉及一种用于调谐电力传输系统中的功率振荡阻尼单元（22; 26）的方法，功率控制装置和计算机程序产品。 功率控制装置（10）包括探测信号产生元件（42），被配置为产生至少一个探测信号（PS）并将探测信号发送到电力传输系统中;数据提取元件（36），被配置为接收探测信号 放置在电力传输系统中的来自测量单元（12,14,16）的响应（PSR1，PSR2，PSRn）和系统参数确定元件（40）被配置为确定基于电力传输系统的系统模型参数（SP1; SP2） 探测信号和探测信号响应，并使用系统模型参数调谐功率振荡阻尼单元。

    FAULT PROTECTION OF HVDC TRANSMISSION LINES
    33.
    发明申请
    FAULT PROTECTION OF HVDC TRANSMISSION LINES 审中-公开
    高压直流输电线路的故障保护

    公开(公告)号：WO2011157305A1

    公开(公告)日：2011-12-22

    申请号：PCT/EP2010/063372

    申请日：2010-09-13

    Applicant: ABB RESEARCH LTD ,  BERGGREN, Bertil ,  WANG, Jianping ,  PAN, Juiping ,  SRIVASTAVA, Kailash ,  LINDEN, Kerstin ,  NUQUI, Reynaldo

    Inventor： BERGGREN, Bertil ,  WANG, Jianping ,  PAN, Juiping ,  SRIVASTAVA, Kailash ,  LINDEN, Kerstin ,  NUQUI, Reynaldo

    IPC: H02H7/26 ,  H02H3/38 ,  H02H3/42 ,  H02H3/44

    CPC classification number: H02H3/42 ,  H02H3/38 ,  H02H3/445 ,  H02H7/268

    Abstract: A protection system (200) for high voltage direct current, HVDC, transmission lines is provided. The protection system comprises a direct current, DC, bus (201), means (202) for connecting an HVDC transmission line to the bus, at least one DC circuit breaker (203, 204) arranged for disconnecting the transmission line from the bus upon reception of a trip signal, current (211) and voltage sensors (212), an inductor (213) arranged such that the current through the transmission line passes the inductor, and a fault detection unit (220). The fault detection unit is arranged for assessing, on the basis of current and/or voltage measurements, whether a fault exists on the transmission line, and sending, if a fault is detected on the transmission line, a trip signal to the circuit breaker. The additional inductance limits the rise in fault current and facilitates a selective fault detection. Further, a method of fault protection for an HVDC transmission line is provided.

    Abstract translation: 提供用于高压直流，HVDC，传输线路的保护系统（200）。 保护系统包括直流DC总线（201），用于将HVDC传输线连接到总线的装置（202），至少一个直流断路器（203,204），其布置成用于将传输线与总线断开 接收跳闸信号，电流（211）和电压传感器（212），布置成使得通过传输线的电流通过电感器的电感器（213）和故障检测单元（220）。 该故障检测单元被设置为基于当前和/或电压测量来评估传输线路上是否存在故障，并且如果在传输线路上检测到故障则发送到断路器的跳闸信号。 附加电感限制故障电流的上升，并有助于选择性故障检测。 此外，还提供了用于HVDC传输线的故障保护方法。

    METHOD AND DEVICE TO PREDICT A STATE OF A POWER SYSTEM IN THE TIME DOMAIN
    34.
    发明申请
    METHOD AND DEVICE TO PREDICT A STATE OF A POWER SYSTEM IN THE TIME DOMAIN 审中-公开
    用于预测时域中电力系统状态的方法和装置

    公开(公告)号：WO2008148428A1

    公开(公告)日：2008-12-11

    申请号：PCT/EP2007/055670

    申请日：2007-06-08

    Applicant: ABB RESEARCH LTD ,  BERGGREN, Bertil ,  BENGTSON, Tord ,  ROXENBORG, Stefan

    Inventor： BERGGREN, Bertil ,  BENGTSON, Tord ,  ROXENBORG, Stefan

    IPC: G01R31/08 ,  H02H3/04 ,  H02J13/00 ,  G01R19/25

    CPC classification number: G01R31/088 ,  G01R19/2513 ,  H02J13/0006

    Abstract: A method to predict a state of a power system and a device to perform the method are presented, where the method comprises the step of performing a Fast Fourier Transform on samples of a periodic waveform signal () in order to determine a frequency spectrum (S()) of the periodic waveform signal (), where the periodic waveform signal () was derived from at least one measurable electric quantity of the power system and is representative for the state of the power system. According to the method, frequencies (fi) and related complex amplitudes (Ai) at selected peaks in the frequency spectrum (S()) are determined and stored together with a time stamp (t0). Afterwards, a predicted value (p) of the periodic waveform signal () in the time domain is determined at a prediction time (tp) by calculating a sum of sinusoidal signals at the prediction time (tp), where each of the sinusoidal signals is characterized by one of the determined frequencies (fi) and its related complex amplitude (Ai) as well as the time stamp (t0). The predicted value (p) is stored for future processing, such as the comparison of the predicted value (p) with a measured value (m) the result of which could lead to the initialization of further analysis.

    Abstract translation: 提出了一种预测电力系统的状态和执行该方法的装置的方法，其中该方法包括对周期性波形信号（）的采样执行快速傅立叶变换以确定频谱（S （）），其中周期性波形信号（）从电力系统的至少一个可测量电量导出，并且代表电力系统的状态。 根据该方法，确定频谱（S（））中选定峰处的频率（fi）和相关复振幅（Ai）并与时间戳（t0）一起存储。 然后，通过计算预测时间（tp）的正弦信号之和，在预测时间（tp）中确定时域中的周期波形信号（）的预测值（p），其中每个正弦信号为 其特征在于确定的频率（fi）和其相关的复振幅（Ai）中的一个以及时间戳（t0）。 存储预测值（p）用于将来处理，例如将预测值（p）与测量值（m）进行比较，其结果可导致进一步分析的初始化。

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