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1.发明公开Filtering method for capacitive voltage transformers 有权Filterungsverfahrenfürkapazitiver Spannungswandler
公开(公告)号：EP1976119A2
公开(公告)日：2008-10-01
申请号：EP08153124.6
申请日：2008-03-20
CPC分类号： H03H17/04 , G01R15/16 , H03H2017/0477
摘要： A method of digitally correcting the raw output voltage (605) from a Capacitive Voltage Transformer (CVT) with the intent to remove transient components impacting on transient accuracy of protection function. A typical CVT is represented using three parameters in the linear CVT model. A digital filter (608) designed based on the three parameters and incorporating a dedicated mechanism to ensure numerical stability of the former. A method of self-adjusting the said filter based on system events and performed after the method has been deployed in the field and supplied from a specific CVT.
摘要翻译： 一种从电容式电压互感器（CVT）数字校正原始输出电压（605）的方法，旨在消除影响保护功能的瞬态精度的瞬态分量。 典型的CVT在线性CVT模型中使用三个参数表示。 基于三个参数设计的数字滤波器（608），并结合专用机构来确保前者的数值稳定性。 一种基于系统事件自动调整所述过滤器的方法，并且在该方法已经在现场部署并且从特定CVT提供之后执行。
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2.发明公开A fast impedance protection technique immune to dynamic errors of capacitive voltage transformers 有权Schnelle Widerstandsschutztechnik，dieunanfälligfürdynamische Fehler von Kondensatorspannungstransformatoren ist
公开(公告)号：EP1976089A2
公开(公告)日：2008-10-01
申请号：EP08153006.5
申请日：2008-03-19
IPC分类号： H02H3/40
CPC分类号： H02H3/402
摘要： The present invention relates to methods for providing impedance protection differentiating between in-zone and out-of-zone faults based on instantaneous, digitally derived operating and polarizing distance comparator signals. The method uses a pair of fast orthogonal filters to derive D and Q components of the input voltages and currents. Two sets of operating and polarizing signals are derived for better speed of response under varying fault moment with respect to the peaks and zero crossings of power signals. Three stages of comparison between the operating and polarizing impedance terms are used. These comparator stages use half a cycle averaging windows, and three-quarters-of a-cycle windows. The first stage of comparison is based on energy comparator responding to both magnitude and phase information in the signals. Stages 2 and 3 are of phase comparison type, responding mostly at the phase information and neglecting the magnitude information for better immunity to noise and signal distortions.
摘要翻译： 本发明涉及提供阻抗保护的方法，其基于瞬时的，数字导出的操作和偏振距离比较器信号来区分区域内和区域外故障。 该方法使用一对快速正交滤波器来导出输入电压和电流的D和Q分量。 导出两组操作和极化信号，以在相对于功率信号的峰值和过零点的变化故障时刻获得更好的响应速度。 使用操作和极化阻抗项之间的三个比较阶段。 这些比较器级使用半周期平均窗口和四分之三的四周窗口。 第一阶段的比较是基于能量比较器响应信号中的幅度和相位信息。 阶段2和阶段3是相位比较类型，主要响应于相位信息，并且忽略幅度信息以更好地抵抗噪声和信号失真。
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3.发明公开A fast impedance protection technique immune to dynamic errors of capacitive voltage transformers 有权快速性保护技术，是不敏感的电容式电压互感器的动态误差
公开(公告)号：EP1976089A3
公开(公告)日：2013-10-02
申请号：EP08153006.5
申请日：2008-03-19
IPC分类号： H02H3/40
CPC分类号： H02H3/402
摘要： The present invention relates to methods for providing impedance protection differentiating between in-zone and out-of-zone faults based on instantaneous, digitally derived operating and polarizing distance comparator signals. The method uses a pair of fast orthogonal filters to derive D and Q components of the input voltages and currents. Two sets of operating and polarizing signals are derived for better speed of response under varying fault moment with respect to the peaks and zero crossings of power signals. Three stages of comparison between the operating and polarizing impedance terms are used. These comparator stages use half a cycle averaging windows, and three-quarters-of a-cycle windows. The first stage of comparison is based on energy comparator responding to both magnitude and phase information in the signals. Stages 2 and 3 are of phase comparison type, responding mostly at the phase information and neglecting the magnitude information for better immunity to noise and signal distortions.
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4.发明授权A fast impedance protection technique immune to dynamic errors of capacitive voltage transformers 有权快速性保护技术，是不敏感的电容式电压互感器的动态误差
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公开(公告)号：EP1976119B1
公开(公告)日：2016-11-09
申请号：EP08153124.6
申请日：2008-03-20
CPC分类号： H03H17/04 , G01R15/16 , H03H2017/0477
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公开(公告)号：EP1976119A3
公开(公告)日：2013-12-04
申请号：EP08153124.6
申请日：2008-03-20
CPC分类号： H03H17/04 , G01R15/16 , H03H2017/0477
摘要： A method of digitally correcting the raw output voltage (605) from a Capacitive Voltage Transformer (CVT) with the intent to remove transient components impacting on transient accuracy of protection function. A typical CVT is represented using three parameters in the linear CVT model. A digital filter (608) designed based on the three parameters and incorporating a dedicated mechanism to ensure numerical stability of the former. A method of self-adjusting the said filter based on system events and performed after the method has been deployed in the field and supplied from a specific CVT.
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