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1. 发明申请

US20090222144A1 SYSTEMS AND METHODS FOR ELECTROMECHANICAL OSCILLATION MONITORING 有权
标题翻译：电气振荡监测系统与方法
公开(公告)号：US20090222144A1
公开(公告)日：2009-09-03
申请号：US12397207
申请日：2009-03-03
申请人： Vaithianathan Venkatasubramanian , Guoping Liu
发明人： Vaithianathan Venkatasubramanian , Guoping Liu
IPC分类号： G06F1/28 , G06F17/14
CPC分类号： G01R19/2513 , H02J3/24 , Y02E60/728 , Y04S10/265
摘要： Systems and methods for electromechanical oscillation monitoring are disclosed herein. In one embodiment, a method for monitoring electromechanical oscillation in a power system includes forming a power density spectrum in frequency domain based on phasor measurements collected from a plurality of locations in the power system and identifying an oscillation in the power density spectrum. The oscillation has a power density larger than other oscillations. The method also includes analyzing the identified oscillation in time domain to determine a damping characteristic of the identified oscillation and indicating that an insufficiently damped oscillation exists in the power system if the determined damping characteristic of the oscillation meets a predetermined condition.
摘要翻译：本文公开了用于机电振荡监视的系统和方法。在一个实施例中，一种用于监测电力系统中的机电振荡的方法包括：基于从电力系统中的多个位置收集的相量测量值，并且确定功率密度谱中的振荡，在频域中形成功率密度谱。振荡的功率密度大于其他振荡。该方法还包括分析所确定的时域振荡以确定所识别的振荡的阻尼特性，并且如果所确定的振荡的阻尼特性满足预定条件，并且指示在电力系统中存在不充分的阻尼振荡。

2. 发明授权

US08498832B2 Method and device for assessing and monitoring voltage security in a power system 有权
标题翻译：评估和监测电力系统电压安全的方法和装置
公开(公告)号：US08498832B2
公开(公告)日：2013-07-30
申请号：US12239637
申请日：2008-09-26
申请人： Vaithianathan Venkatasubramanian
发明人： Vaithianathan Venkatasubramanian
IPC分类号： G01R27/00 , G01R21/00
CPC分类号： G05F1/70
摘要： Provided is a method and device for assessing and monitoring voltage security in a power system. More specifically, a method and device for assessing and monitoring the value of reactive power load when changes in reactive power outputs of at least some of the generators in the electrical power system cause all of the generators in the system to reach the combined operating limit of their reactive power output. In response thereto, the method and device are further adapted to initiate suitable control measures such as switching of transformer banks and/or capacitor/reactor banks, as well as shedding loads whenever necessary to mitigate an impending voltage stability problem.
摘要翻译：提供了用于评估和监测电力系统中的电压安全性的方法和装置。更具体地说，一种用于在电力系统中的至少一些发电机的无功功率输出变化时评估和监视无功功率负载的值的方法和装置使得系统中的所有发电机都达到组合运行极限其无功功率输出。响应于此，该方法和装置进一步适于启动适当的控制措施，例如变压器组和/或电容器/电抗器组的切换，以及在需要时减少负载以减轻即将发生的电压稳定性问题。

3. 发明授权

US08000914B2 Systems and methods for electromechanical oscillation monitoring 有权
标题翻译：机电振荡监测系统及方法
公开(公告)号：US08000914B2
公开(公告)日：2011-08-16
申请号：US12397207
申请日：2009-03-03
申请人： Vaithianathan Venkatasubramanian , Guoping Liu
发明人： Vaithianathan Venkatasubramanian , Guoping Liu
IPC分类号： G01R13/08
CPC分类号： G01R19/2513 , H02J3/24 , Y02E60/728 , Y04S10/265
摘要： Systems and methods for electromechanical oscillation monitoring are disclosed herein. In one embodiment, a method for monitoring electromechanical oscillation in a power system includes forming a power density spectrum in frequency domain based on phasor measurements collected from a plurality of locations in the power system and identifying an oscillation in the power density spectrum. The oscillation has a power density larger than other oscillations. The method also includes analyzing the identified oscillation in time domain to determine a damping characteristic of the identified oscillation and indicating that an insufficiently damped oscillation exists in the power system if the determined damping characteristic of the oscillation meets a predetermined condition.
摘要翻译：本文公开了用于机电振荡监视的系统和方法。在一个实施例中，一种用于监测电力系统中的机电振荡的方法包括：基于从电力系统中的多个位置收集的相量测量值，并且确定功率密度谱中的振荡，在频域中形成功率密度谱。振荡的功率密度大于其他振荡。该方法还包括分析所确定的时域振荡以确定所识别的振荡的阻尼特性，并且如果所确定的振荡的阻尼特性满足预定条件，并且指示在电力系统中存在不充分的阻尼振荡。

4. 发明授权

US08788244B2 Systems and methods for global voltage security assessment in power systems 有权
标题翻译：电力系统全球电压安全评估的系统和方法
公开(公告)号：US08788244B2
公开(公告)日：2014-07-22
申请号：US13113876
申请日：2011-05-23
申请人： Vaithianathan Venkatasubramanian , Xing Liu
发明人： Vaithianathan Venkatasubramanian , Xing Liu
IPC分类号： G06F7/60 , G06F17/10
CPC分类号： H02J3/18 , G06F17/5036 , G06F2217/78 , H02J2003/007 , Y02E40/30 , Y02E60/76 , Y04S40/22
摘要： Systems and methods for global voltage security assessment in power systems are disclosed herein. In one embodiment, a method for assessing voltage security in a power system having a number (i) of buses includes capturing a change in bus voltage and a change in line reactive power for at least some of the buses in the power system, for each of the i number of buses, calculating a voltage assessment index) (Γi) for as follows: Γ i = ∑ j ⁢ Δ ⁢ ⁢ Q ij Δ ⁢ ⁢ V i where ΔVi is the change in bus voltage and ΔQij is the change in line reactive power from a connection j over a predetermined period of time. The method further includes assessing a current voltage security status of the power system based on the calculated voltage assessment index (Γi).
摘要翻译：本文公开了用于电力系统中全球电压安全评估的系统和方法。在一个实施例中，一种用于评估具有数字（i）总线的电力系统中的电压安全性的方法包括：对于每个总线，捕获总线电压的变化和电力系统中的至少一些总线的线路无功功率的变化的公交车数，计算电压评估指标）（＆Ggr; i）如下：＆Ggr; i =Σj＆Dgr; ⁢Q ij＆Dgr; υV i其中＆Dgr; Vi是总线电压和＆Dgr的变化; Qij是在预定时间段内来自连接j的线路无功功率的变化。该方法还包括基于所计算的电压评估指数（＆Ggr; i）来评估电力系统的当前电压安全状态。

5. 发明申请

US20120136643A1 SYSTEMS AND METHODS FOR GLOBAL VOLTAGE SECURITY ASSESSMENT IN POWER SYSTEMS 有权
标题翻译：电力系统全球电压安全评估系统与方法
公开(公告)号：US20120136643A1
公开(公告)日：2012-05-31
申请号：US13113876
申请日：2011-05-23
申请人： Vaithianathan Venkatasubramanian , Xing Liu
发明人： Vaithianathan Venkatasubramanian , Xing Liu
IPC分类号： G06F17/50
CPC分类号： H02J3/18 , G06F17/5036 , G06F2217/78 , H02J2003/007 , Y02E40/30 , Y02E60/76 , Y04S40/22
摘要： Systems and methods for global voltage security assessment in power systems are disclosed herein. In one embodiment, a method for assessing voltage security in a power system having a number (i) of buses includes capturing a change in bus voltage and a change in line reactive power for at least some of the buses in the power system, for each of the i number of buses, calculating a voltage assessment index) (Γi) for as follows: Γ i = ∑ j  Δ   Q ij Δ   V i where ΔVi is the change in bus voltage and ΔQij is the change in line reactive power from a connection j over a predetermined period of time. The method further includes assessing a current voltage security status of the power system based on the calculated voltage assessment index (Γi).
摘要翻译：本文公开了用于电力系统中全球电压安全评估的系统和方法。在一个实施例中，一种用于评估具有数字（i）总线的电力系统中的电压安全性的方法包括：对于每个总线，捕获总线电压的变化和电力系统中的至少一些总线的线路无功功率的变化的公交车数，计算电压评估指标）（＆Ggr; i）如下：＆Ggr; i =Σj＆Dgr; 人物Q ij＆Dgr 其中＆Dgr; Vi是总线电压和Dgr的变化; Qij是在预定时间段内来自连接j的线路无功功率的变化。该方法还包括基于所计算的电压评估指数（＆Ggr; i）来评估电力系统的当前电压安全状态。

6. 发明申请

US20090085407A1 METHOD AND DEVICE FOR ASSESSING AND MONITORING VOLTAGE SECURITY IN A POWER SYSTEM 有权
标题翻译：用于评估和监控电力系统中的电压安全的方法和装置
公开(公告)号：US20090085407A1
公开(公告)日：2009-04-02
申请号：US12239637
申请日：2008-09-26
申请人： Vaithianathan Venkatasubramanian
发明人： Vaithianathan Venkatasubramanian
IPC分类号： G05F1/70
CPC分类号： G05F1/70
摘要： Provided is a method and device for assessing and monitoring voltage security in a power system. More specifically, a method and device for assessing and monitoring the value of reactive power load when changes in reactive power outputs of at least some of the generators in the electrical power system cause all of the generators in the system to reach the combined operating limit of their reactive power output. In response thereto, the method and device are further adapted to initiate suitable control measures such as switching of transformer banks and/or capacitor/reactor banks, as well as shedding loads whenever necessary to mitigate an impending voltage stability problem.
摘要翻译：提供了用于评估和监测电力系统中的电压安全性的方法和装置。更具体地说，一种用于在电力系统中的至少一些发电机的无功功率输出变化时评估和监视无功功率负载的值的方法和装置使得系统中的所有发电机都达到组合运行极限其无功功率输出。响应于此，该方法和装置进一步适于启动适当的控制措施，例如变压器组和/或电容器/电抗器组的切换，以及在需要时减少负载以减轻即将发生的电压稳定性问题。

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