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公开(公告)号：US07107162B2
公开(公告)日：2006-09-12
申请号：US10499701
申请日：2002-12-11
申请人： Marek Zima , Christian Rehtanz , Mats Larsson
发明人： Marek Zima , Christian Rehtanz , Mats Larsson
IPC分类号： G06F19/00
CPC分类号： H02H7/226 , H02H3/40 , H02H6/005 , Y10T307/735
摘要： In a method, computer program and system for determining an operational limit of a power transmission line, time-stamped current phasor information and voltage phasor information for a first end and a second end of the line are determined, an ohmic resistance of the line is computed from the phasor information, and an average line temperature is computed from the ohmic resistance. This allows to determine the average line temperature without dedicated temperature sensors. The average line temperature represents the actual average temperature and is largely independent of assumptions regarding line parameters.
摘要翻译： 在一种方法中，确定用于确定电力传输线的操作限制的计算机程序和系统，用于线路的第一端和第二端的时间戳的电流相量信息和电压相量信息，线路的欧姆电阻为 根据相量信息计算，并且根据欧姆电阻计算平均线路温度。 这可以确定没有专用温度传感器的平均线路温度。 平均线路温度表示实际平均温度，并且在很大程度上独立于有关线路参数的假设。
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公开(公告)号：US20050222808A1
公开(公告)日：2005-10-06
申请号：US10499701
申请日：2002-12-11
申请人： Marek Zima , Christian Rehtanz , Mats Larsson
发明人： Marek Zima , Christian Rehtanz , Mats Larsson
CPC分类号： H02H7/226 , H02H3/40 , H02H6/005 , Y10T307/735
摘要： In a method, computer program and system for determining an operational limit of a power transmission line, time-stamped current phasor information and voltage phasor information for a first end and a second end of the line are determined, an ohmic resistance of the line is computed from the phasor information, and an average line temperature is computed from the ohmic resistance. This allows to determine the average line temperature without dedicated temperature sensors. The average line temperature represents the actual average temperature and is largely independent of assumptions regarding line parameters.
摘要翻译： 在一种方法中，确定用于确定电力传输线的操作限制的计算机程序和系统，用于线路的第一端和第二端的时间戳的电流相量信息和电压相量信息，线路的欧姆电阻为 根据相量信息计算，并且根据欧姆电阻计算平均线路温度。 这可以确定没有专用温度传感器的平均线路温度。 平均线路温度表示实际平均温度，并且在很大程度上独立于有关线路参数的假设。
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3.发明授权公开(公告)号：US07200500B2
公开(公告)日：2007-04-03
申请号：US10671561
申请日：2003-09-29
申请人： Mats Larsson , Christian Rehtanz , Marek Zima
发明人： Mats Larsson , Christian Rehtanz , Marek Zima
CPC分类号： H02J3/00 , H02J2003/007 , Y02E60/728 , Y02E60/76 , Y04S10/265 , Y04S40/22
摘要： A method for determining an equivalent impedance of a transmission section of an electrical network, includes representing the transmission section as having at least two interfaces with other sections of the network. For each interface, a voltage phasor and a current phasor flowing through the interface are determined from simultaneously made measurements at the interfaces. From the phasors, the equivalent impedance is calculated. The required simultaneousness of the phasor measurements is achieved by means of Phasor Measurement Units (PMUs) that are synchronized via the Global Positioning System (GPS).
摘要翻译： 一种用于确定电网的传输部分的等效阻抗的方法，包括将所述传输部分表示为与所述网络的其它部分具有至少两个接口。 对于每个接口，通过界面处的同时进行的测量来确定流过界面的电压相量和电流相量。 从相量计算等效阻抗。 通过通过全球定位系统（GPS）同步的相量测量单元（PMU）实现相量测量的所需同时性。
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公开(公告)号：US07277779B2
公开(公告)日：2007-10-02
申请号：US10870160
申请日：2004-06-18
申请人： Marek Zima , Mats Larsson , Joachim Bertsch
发明人： Marek Zima , Mats Larsson , Joachim Bertsch
CPC分类号： G05B13/048 , H02J2003/001
摘要： The present invention is concerned with a method for real-time emergency control of power transmission networks, based on a modification of the model predictive control (MPC) approach. Following the detection of a contingency at time tc only one nominal trajectory xnom is approximated, together with its corresponding trajectory sensitivities for evaluating the effect of various key parameters or potential control actions. An optimum input control is finally identified via the solution of a cost function including e.g. a punishment for excessive load shedding. The process is started only if the nominal trajectory does not remain within acceptable trajectory limits.
摘要翻译： 本发明涉及一种基于模型预测控制（MPC）方法的修改的输电网实时应急控制方法。 在时间t检测到偶然事件之后，只有一个标称轨迹x nom is is is is with with with control control control control control control control control control control control control control control control control control control control control control control control control control control control control 行动。 最终通过成本函数的解决方案来确定最佳输入控制，包括例如。 对过度负荷脱落的处罚。 只有当标称轨迹不能保持在可接受的轨迹范围内时才开始该过程。
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公开(公告)号：US20070038396A1
公开(公告)日：2007-02-15
申请号：US11503164
申请日：2006-08-14
申请人： Marek Zima , Petr Korba , Albert Leirbukt , Mats Larsson
发明人： Marek Zima , Petr Korba , Albert Leirbukt , Mats Larsson
IPC分类号： G06F19/00
CPC分类号： H02H7/226 , H02H3/40 , H02H6/005 , Y10T307/735
摘要： A relationship between a temperature Tl of a power line or power transmission conductor 10, an electrical quantity of the power line such as a current l or power flow P through the power line, as well as meteorological quantities or ambient conditions of the power line such as wind speed W, wind direction, humidity, solar radiation S and ambient temperature Ta, is established in the form of a thermal model of the power line. Values of the aforementioned quantities or variables are continuously measured, and the collected values of the quantities are evaluated in order to update model parameters of the thermal model during operation of the power line. In an exemplary embodiment, an average temperature representative of the entire line is determined via two phasor measurement units (PMU) 11, 11′ providing synchronized phasor values from two ends of the power line. An ohmic resistance of the power line can be computed from the phasor values, from which in turn the average line temperature can be derived.
摘要翻译： 电力线或电力传输用导体10的温度T L1之间的关系，电力线等的电力线的电量或通过电力线的动力流P以及气象量 或电力线的环境条件，例如风速W，风向，湿度，太阳辐射S和环境温度T a a a以电力线的热模型的形式建立。 连续地测量上述数量或变量的值，并且评估量的收集值，以便在电力线的运行期间更新热模型的模型参数。 在示例性实施例中，通过两个相量测量单元（PMU）11,11'来确定表示整条线路的平均温度，从而提供来自电力线两端的同步相量值。 可以从相量值计算电力线的欧姆电阻，从而可以导出平均线路温度。
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公开(公告)号：US20090216472A1
公开(公告)日：2009-08-27
申请号：US12368819
申请日：2009-02-10
申请人： Marek Zima , Petr Korba , Albert Leirbukt , Mats Larsson
发明人： Marek Zima , Petr Korba , Albert Leirbukt , Mats Larsson
摘要： A relationship between a temperature TI of a power line or power transmission conductor, an electrical quantity of the power line such as a current I or power flow P through the power line, as well as meteorological quantities or ambient conditions of the power line such as wind speed W, wind direction, humidity, solar radiation S and ambient temperature Ta, is established in the form of a thermal model of the power line. Values of the aforementioned quantities or variables are continuously measured, and the collected values of the quantities are evaluated in order to update model parameters of the thermal model during operation of the power line. In one example, an average temperature representative of the entire line is determined via two Phasor Measurement Units (PMU) 11, 11′ providing synchronized phasor values from two ends of the power line. An ohmic resistance of the power line is computed from the phasor values, from which in turn the average line temperature can be derived.
摘要翻译： 电力线路或电力传输导体的温度TI，通过电力线的电流I的电力线或电力流P的电量以及电力线的气象量或环境条件之间的关系，例如 风速W，风向，湿度，太阳辐射S和环境温度Ta以电力线的热模型的形式建立。 连续地测量上述数量或变量的值，并且评估量的收集值，以便在电力线的运行期间更新热模型的模型参数。 在一个示例中，表示整条线路的平均温度通过两个相量测量单元（PMU）11,11'确定，该相量测量单元从电源线的两端提供同步的相量值。 根据相量值计算电力线的欧姆电阻，从而可以导出平均线路温度。
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公开(公告)号：US20080281437A1
公开(公告)日：2008-11-13
申请号：US12149247
申请日：2008-04-29
申请人： Petr Korba , Marek Zima , Mats Larsson
发明人： Petr Korba , Marek Zima , Mats Larsson
摘要： The present disclosure relates to monitoring of electromechanical oscillations in electric power systems, and their identification by an adaptive algorithm based on a repeatedly measured and evaluated signal. In order for an estimation of parameters of a model of the power system to reasonably converge, proper initialization of the recursive calculation is required, including the definition of tuning parameters constraining the model and the calculation. Initialization for a second signal to be exploited can then be simplified by copying the set of tuning parameters tuned previously for a different signal. A conditioning gain multiplying the second signal establishes compatibility between the different signals, and a signal pre-filter in turn discards contributions beyond a frequency band comprising typical electromagnetic oscillations.
摘要翻译： 本公开涉及通过基于重复测量和评估的信号的自适应算法来监测电力系统中的机电振荡及其识别。 为了对电力系统模型的参数进行合理收敛，需要对递归计算进行恰当的初始化，包括限制模型和计算的调整参数的定义。 然后可以通过复制先前为不同信号调谐的一组调谐参数来简化要利用的第二信号的初始化。 与第二信号相乘的调节增益建立不同信号之间的兼容性，并且信号预滤波器进而丢弃超出包括典型电磁振荡的频带的贡献。
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公开(公告)号：US07912589B2
公开(公告)日：2011-03-22
申请号：US12149247
申请日：2008-04-29
申请人： Petr Korba , Marek Zima , Mats Larsson
发明人： Petr Korba , Marek Zima , Mats Larsson
摘要： The present disclosure relates to monitoring of electromechanical oscillations in electric power systems, and their identification by an adaptive algorithm based on a repeatedly measured and evaluated signal. In order for an estimation of parameters of a model of the power system to reasonably converge, proper initialization of the recursive calculation is required, including the definition of tuning parameters constraining the model and the calculation. Initialization for a second signal to be exploited can then be simplified by copying the set of tuning parameters tuned previously for a different signal. A conditioning gain multiplying the second signal establishes compatibility between the different signals, and a signal pre-filter in turn discards contributions beyond a frequency band comprising typical electromagnetic oscillations.
摘要翻译： 本公开涉及通过基于重复测量和评估的信号的自适应算法来监测电力系统中的机电振荡及其识别。 为了对电力系统模型的参数进行合理收敛，需要对递归计算进行恰当的初始化，包括限制模型和计算的调整参数的定义。 然后可以通过复制先前为不同信号调谐的一组调谐参数来简化要利用的第二信号的初始化。 与第二信号相乘的调节增益建立不同信号之间的兼容性，并且信号预滤波器进而丢弃超出包括典型电磁振荡的频带的贡献。
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公开(公告)号：US20050099747A1
公开(公告)日：2005-05-12
申请号：US10870160
申请日：2004-06-18
申请人： Marek Zima , Mats Larsson , Joachim Bertsch
发明人： Marek Zima , Mats Larsson , Joachim Bertsch
CPC分类号： G05B13/048 , H02J2003/001
摘要： The present invention is concerned with a method for real-time emergency control of power transmission networks, based on a modification of the model predictive control (MPC) approach. Following the detection of a contingency at time tc only one nominal trajectory xnom is approximated, together with its corresponding trajectory sensitivities for evaluating the effect of various key parameters or potential control actions. An optimum input control is finally identified via the solution of a cost function including e.g. a punishment for excessive load shedding. The process is started only if the nominal trajectory does not remain within acceptable trajectory limits.
摘要翻译： 本发明涉及一种基于模型预测控制（MPC）方法的修改的输电网实时应急控制方法。 在时间t检测到偶然事件之后，只有一个标称轨迹x≠nom is is is with with with control control control control control control control control control control control control control control control control control control control control control control control control control control control control control 行动。 最终通过成本函数的解决方案来确定最佳输入控制，包括例如。 对过度负荷脱落的处罚。 只有当标称轨迹不能保持在可接受的轨迹范围内时才开始该过程。
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公开(公告)号：US07149637B2
公开(公告)日：2006-12-12
申请号：US10871685
申请日：2004-06-18
申请人： Petr Korba , Mats Larsson , Christian Rehtanz
发明人： Petr Korba , Mats Larsson , Christian Rehtanz
IPC分类号： G06F17/00
CPC分类号： H02J3/24 , Y02E60/728 , Y04S10/265
摘要： The detection of electromechanical oscillations in power systems and the estimation of their frequency and damping parameters are based on a linear time-varying model. The parameters of the linear model are on-line adapted by means of Kalman filtering techniques to optimally approximate the measured signal representing the behavior of the power system based on a quadratic criterion. The estimated model parameters are then the basis for the calculation of parameters of the oscillations. Adaptive algorithms are based on a recursive calculation of the estimated parameter vector for each time-step based on the new value of the measured signal and the old values of the estimated parameters.
摘要翻译： 电力系统中机电振荡的检测及其频率和阻尼参数的估计基于线性时变模型。 线性模型的参数通过卡尔曼滤波技术在线适应，以基于二次标准最佳近似表示电力系统行为的测量信号。 估计的模型参数是计算振荡参数的基础。 自适应算法基于基于测量信号的新值和估计参数的旧值的每个时间步长的估计参数矢量的递归计算。
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