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    • 1. 发明授权
    • Hybrid active power filter with programmed impedance characteristics
    • 具有编程阻抗特性的混合有源电力滤波器
    • US5910889A
    • 1999-06-08
    • US864999
    • 1997-05-29
    • Einar LarsenRobert Delmerico
    • Einar LarsenRobert Delmerico
    • H02J3/01H02M1/12
    • H02J3/01Y02E40/22
    • A hybrid active power filter having programmed impedance characteristics is presented. In accordance with which, a passive device comprising a capacitor C.sub.F is connected in series with an active device which are together connected in shunt with a power source and a load at transmission lines of a power system. Capacitor C.sub.F substantially supports the full-line voltage V.sub.H of the power source, whereby the active filter is exposed to a substantially lower voltage than the line voltage V.sub.H. The active device includes on active filter, i.e., an inverter current regulator with a programmable controller for executing a control algorithm. The controller of the active device receives signals corresponding to a voltage V.sub.M, at the low side of filter capacitor C.sub.F. Voltage V.sub.M is at a substantially lower voltage than the line voltage V.sub.H, whereby the cost of sensing voltage V.sub.M is significantly less than sensing the high line voltage V.sub.. The control algorithm of the present invention is expressed as ##EQU1## where I.sub.A is the current in the active device and Y.sub.FAo is an order transfer function of the effective admittance of the active device. Y.sub.FAo is a continuous function which is defined to provide a low impedance path at desired frequencies. Accordingly, the control algorithm controls the current I.sub.A in response to voltage V.sub.M sensed at the low side of filter capacitor C.sub.F as dictated by the programmed function. The active device may be connected to the passive filter at a junction between two capacitors or at a junction between two inductors.
    • 提出了具有编程阻抗特性的混合有源电力滤波器。 根据该方式,包括电容器CF的无源器件与有源器件串联连接,该有源器件一起连接在电源和电力系统的传输线路上的负载分流中。 电容器CF基本上支持电源的全线电压VH,由此有源滤波器暴露于比线电压VH更低的电压。 有源器件包括有源滤波器,即具有用于执行控制算法的可编程控制器的反相器电流调节器。 有源器件的控制器在滤波电容器CF的低侧接收对应于电压VM的信号。 电压VM的电压远低于线路电压VH,因此感测电压VM的成本明显低于感测高的线路电压V.本发明的控制算法表示为:IA是有效的电流 器件和YFAo是有源器件有效导纳的定单传递函数。 YFAo是一种连续功能,其定义为在所需频率下提供低阻抗路径。 因此,控制算法响应于由编程功能所规定的在滤波电容器CF的低侧检测到的电压VM来控制电流IA。 有源器件可以在两个电容器之间的接点处或两个电感器之间的连接处连接到无源滤波器。
    • 5. 发明授权
    • System, method, and article of manufacture for determining parameter values associated with an electrical grid
    • 用于确定与电网相关联的参数值的系统,方法和制造
    • US07346462B2
    • 2008-03-18
    • US11392107
    • 2006-03-29
    • Robert Delmerico
    • Robert Delmerico
    • G01R21/00H02J1/00H02M7/00
    • G01R21/1271G01R19/2513H02J3/383H02J3/386Y02E10/563Y02E10/763Y10T307/398Y10T307/511
    • A system, method, and article of manufacture for determining parameter values associated with an electrical grid in accordance with an exemplary embodiment is provided. The electrical grid has a point of interconnection where the electrical grid is electrically coupled to a power source. The method includes measuring real power at the point of interconnection of the electrical grid to obtain a plurality of real power values. The method further includes measuring reactive power at the point of interconnection of the electrical grid to obtain a plurality of reactive power values. The method further includes measuring a voltage at the point of interconnection of the electrical grid to obtain a plurality of voltage values. The method further includes estimating at least one parameter value associated with the electrical grid utilizing the plurality of real power values, the plurality of reactive power values, and the plurality of voltage values, and a mathematical estimation technique.
    • 提供了根据示例性实施例的用于确定与电网相关联的参数值的系统,方法和制品。 电网具有互连点,其中电网电耦合到电源。 该方法包括测量电网互连点处的有功功率以获得多个实际功率值。 该方法还包括测量电网互连点处的无功功率以获得多个无功功率值。 该方法还包括测量电网互连点处的电压以获得多个电压值。 该方法还包括利用多个有功功率值,多个无功功率值和多个电压值来估计与电网相关联的至少一个参数值,以及数学估计技术。
    • 8. 发明授权
    • System, method, and article of manufacture for controlling operation of an electrical power generation system
    • 用于控制发电系统运行的系统,方法和制造
    • US07505833B2
    • 2009-03-17
    • US11392166
    • 2006-03-29
    • Robert DelmericoMark CardinalNicholas MillerDapeng LiuZhihong Ye
    • Robert DelmericoMark CardinalNicholas MillerDapeng LiuZhihong Ye
    • G05D11/00
    • H02J3/50F03D7/048H02J3/16H02J3/383H02J3/386Y02E10/563Y02E10/723Y02E10/763Y02E40/34Y02P70/523Y10T307/718
    • A system, a method, and an article of manufacture for controlling operation of an electrical power generation system are provided. The electrical power generation system has a plurality of electrical generators electrically coupled to an electrical grid. The method includes obtaining a first output parameter value associated with the electrical power generation system. The method further includes determining an error value indicative of a difference between the first output parameter value and a desired output parameter value. The method further includes determining a first gain value based on at least one of the first output parameter value and a time-varying operational parameter of the electrical power generation system. The method further includes determining a first power value based on the error value and the first gain value. The method further includes determining a second gain value based on at least one of the first output parameter value, the time-varying operational parameter, and a reference value. The method further includes determining a second power value based on the error value and the second gain value. The method further includes generating a desired power command for the electrical power generation system based on the first and second power values.
    • 提供了一种用于控制发电系统的操作的系统,方法和制品。 电力发电系统具有电耦合到电网的多个发电机。 该方法包括获得与发电系统相关联的第一输出参数值。 该方法还包括确定指示第一输出参数值和期望的输出参数值之间的差的误差值。 该方法还包括基于发电系统的第一输出参数值和时变运行参数中的至少一个来确定第一增益值。 该方法还包括基于误差值和第一增益值来确定第一功率值。 该方法还包括基于第一输出参数值,时变操作参数和参考值中的至少一个来确定第二增益值。 该方法还包括基于误差值和第二增益值来确定第二功率值。 该方法还包括基于第一和第二功率值产生用于发电系统的期望功率命令。