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91.发明授权Active power line conditioner with a derived load current fundamental signal for fast dynamic response 失效有源电力线路调节器具有导出的负载电流基频信号，用于快速动态响应
公开(公告)号：US5351178A
公开(公告)日：1994-09-27
申请号：US969344
申请日：1992-10-30
CPC分类号： H02J3/01 , H02J3/1814 , Y02E40/18 , Y02E40/40
摘要： An improved active power line conditioner with fast dynamic response is disclosed. The active power line conditioner includes a series inverter coupled to an energy input source, and a parallel inverter coupled to a non-linear load. The non-linear load is powered by a three phase load current which includes fundamental components and harmonic components.An energy storage element is electrically connected between the series inverter and the parallel inverter. The load current fundamental signal is derived and is multiplied by a derived voltage output/input ratio to render a current reference product. The current reference product may be further modified by a user-set displacement power factor correction ratio. The current reference product is applied to the series inverter for fast dynamic response within the active power line conditioner.
摘要翻译： 公开了一种具有快速动态响应的改进的有源电力线调节器。 有源电力线调节器包括耦合到能量输入源的串联逆变器和耦合到非线性负载的并联逆变器。 非线性负载由包括基波分量和谐波分量的三相负载电流供电。 蓄电元件电连接在串联逆变器和并联逆变器之间。 导出负载电流基波信号并乘以导出的电压输出/输入比，以呈现当前参考产品。 可以通过用户设置的位移功率因数校正比进一步修改当前参考产品。 目前的参考产品适用于串联逆变器，用于有源电力线调节器内的快速动态响应。
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92.发明授权Active power line conditioner utilizing harmonic frequency injection for improved peak voltage regulation 失效有源电力线调节器利用谐波频率注入来改善峰值电压调节
公开(公告)号：US5349517A
公开(公告)日：1994-09-20
申请号：US108269
申请日：1993-08-19
申请人： Michael B. Brennen
发明人： Michael B. Brennen
CPC分类号： H02J3/01 , H02J3/1814 , Y02E40/18 , Y02E40/40
摘要： The present invention provides an active power line conditioner (APLC) which has improved peak voltage regulation capability when compared with similarly-sized devices constructed according to current teachings. The invention utilizes a control function which, when the AC input voltage is not within a given sinusoidal regulation range of the APLC, superimposes selected harmonics of the fundamental frequency on the reference voltage signal used to control voltage regulation action. This causes the AC output voltage of the APLC to have a nonsinusoidal, but peaking waveform shape. The magnitude of the harmonics are preferably controlled to increase as the amount by which the AC input voltage falls outside the linear regulation range of the active power-line conditioner. In presently preferred embodiments, the chosen harmonic frequency is preferably an odd harmonic of the fundamental frequency, with third or fifth harmonics believed to be particularly useful. To Lessen the potential for unwanted zero crossings of the AC output voltage, means may be provided to modulate the harmonic reference with an envelope frequency equal to twice the fundamental frequency.
摘要翻译： 本发明提供一种有源电力线调节器（APLC），其与根据当前教导构造的类似尺寸的装置相比具有改进的峰值电压调节能力。 本发明利用一种控制功能，当AC输入电压不在APLC的给定正弦调节范围内时，将所选择的基频谐波叠加在用于控制电压调节作用的参考电压信号上。 这使得APLC的AC输出电压具有非正弦波，但是峰值波形形状。 谐波的大小优选地被控制为随着AC输入电压落在有源电力线调节器的线性调节范围之外的量而增加。 在目前的优选实施例中，所选择的谐波频率优选地是基频的奇次谐波，其中三次或五次谐波被认为是特别有用的。 为了减轻交流输出电压的不必要的过零点的可能性，可以提供装置，以使其频率等于基频的两倍的包络频率来调谐谐波参考。
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公开(公告)号：US5343139A
公开(公告)日：1994-08-30
申请号：US828845
申请日：1992-01-31
申请人： Laszlo Gyugyi , Colin D. Schauder
发明人： Laszlo Gyugyi , Colin D. Schauder
CPC分类号： G05F5/00 , H02J3/1814 , Y02E40/18 , Y10S174/17
摘要： First and second dc linked, preferably voltage sourced, inverters are connected to an electric power transmission line in shunt and in series, respectively, by coupling transformers. Firing of the GTO-thyristors of the first inverter is controlled to regulate reactive power on the transmission line and to supply real power requirements of the second inverter. The second inverter is controlled to inject into the transmission line in series a voltage which can be adjusted in magnitude and from zero through 360 degrees in phase with respect to the transmission line voltage to selectively adjust any one or more of transmission line voltage magnitude, transmission line impedance and transmission line voltage phase angle. In a high power configuration of the controller each of the inverters includes a plurality of six-pluse inverter modules connected by interstage transformers to form balanced higher order pulse groups controlled through pulse width modulation or through adjustment of the phase between opposite groups to generate the appropriate ac voltages.
摘要翻译： 第一和第二直流连接，优选电压源的逆变器分别通过耦合变压器连接到分流和串联的电力传输线。 控制第一逆变器的GTO晶闸管的点火以调节传输线路上的无功功率并提供第二逆变器的实际功率要求。 控制第二反相器将串联的电压注入到传输线中，该电压可以在幅度上相对于传输线电压从0到360度同相地进行调节，以有选择地调节传输线电压幅度，传输中的任何一个或多个 线路阻抗和传输线电压相位角。 在控制器的高功率配置中，每个逆变器包括多个六级逆变器模块，通过级间变压器连接，以形成通过脉冲宽度调制控制的平衡高阶脉冲组，或通过调整相对组之间的相位来产生适当的 交流电压。
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94.发明授权Active power line conditioner with low cost surge protection and fast overload recovery 失效有源电力线路调节器，具有低成本浪涌保护和快速过载恢复
公开(公告)号：US5287288A
公开(公告)日：1994-02-15
申请号：US969137
申请日：1992-10-30
CPC分类号： H02J3/01 , H02J3/1814 , Y02E40/18 , Y02E40/40
摘要： These and other objects are achieved by an improved active power line conditioner in accordance with the invention. The active power line conditioner includes series inverter coupled to an energy input source, and a parallel inverter coupled to a non-linear load. The non-linear load is powered by a load current which includes fundamental components and harmonic components. An energy storage element is electrically connected between the series inverter and the parallel inverter. A fault condition shorting circuit is supplied in accordance with the invention. The fault condition shorting circuit is coupled to a secondary transformer winding within the series inverter. The fault condition shorting circuit includes a diode bridge which conveys diode bridge current only in the presence of an overvoltage or overcurrent condition. A threshold device is connected to the diode bridge and conducts threshold device current in response to the diode bridge current. The circuit also includes a thyristor with its gate coupled to the threshold device. The thyristor is fired by the first threshold device current so as to short the secondary transformer winding in the presence of an overvoltage or overcurrent condition.
摘要翻译： 这些和其它目的通过根据本发明的改进的有源电力线调节器实现。 有源电力线调节器包括耦合到能量输入源的串联逆变器和耦合到非线性负载的并联逆变器。 非线性负载由负载电流供电，负载电流包括基波分量和谐波分量。 蓄电元件电连接在串联逆变器和并联逆变器之间。 根据本发明提供故障条件短路电路。 故障条件短路电路耦合到串联逆变器内的次级变压器绕组。 故障条件短路电路包括仅在存在过电压或过电流条件的情况下传输二极管电桥电流的二极管桥。 阈值器件连接到二极管电桥，并响应于二极管桥电流导通阈值器件电流。 该电路还包括其栅极耦合到阈值装置的晶闸管。 晶闸管由第一阈值器件电流触发，以便在存在过压或过流条件的情况下使次级变压器绕组短路。
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公开(公告)号：US5227713A
公开(公告)日：1993-07-13
申请号：US883474
申请日：1992-05-15
CPC分类号： G05F1/20 , H02J3/1814 , H02J3/1878 , H02J3/24 , H02P13/06 , H02P9/105 , Y02E40/14 , Y02E40/18 , Y02E40/30
摘要： A subsynchronous resonance mitigation system, including a method and apparatus, for damping undesirable subsynchronous resonance oscillations in a generator, which, if left unchecked, may damage the shafts of a turbine-generator set. A remote coupling apparatus, such as a thyristor controlled series capacitor (TCSC) system, a sourced inverter device, or a static phase shifter, is coupled to the generator by a transmission line. In response to a firing command, the coupling apparatus introduces subsynchronous resonance mitigating currents into the transmission line. Sensors monitor power line parameters and/or the generator speed, and in response thereto, a higher-level controller generates a voltage command. A vernier controller responds to the monitored power line parameters and the voltage command to provide the firing command to the coupling apparatus.
摘要翻译： 一种次同步谐振抑制系统，包括用于阻尼发电机中的不期望的次同步谐振的方法和装置，其如果不加以检查，可能损坏涡轮发电机组的轴。 诸如可控硅控制串联电容器（TCSC）系统，源逆变器装置或静态移相器之类的远程耦合装置通过传输线耦合到发电机。 响应于点火命令，耦合设备将次同步谐振抑制电流引入传输线。 传感器监测电力线参数和/或发电机速度，响应于此，较高级别的控制器产生电压指令。 游标控制器响应受监控的电力线参数和电压指令以向联接装置提供点火命令。
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公开(公告)号：US20180358808A1
公开(公告)日：2018-12-13
申请号：US15780653
申请日：2015-12-14
IPC分类号： H02J3/18
CPC分类号： H02J3/1814 , H02J3/26 , H02M5/44 , Y02E40/18 , Y02E40/50
摘要： A device controls a load flow in an alternating-voltage network. The device is distinguished by a module series circuit of two-pole switching modules that can be inserted in series into a phase line of the alternating-voltage network. Each switching module has an energy store and controllable power semiconductors that can be switched on an off and each switching module can be controlled in such a way that a switching-module voltage can be produced at the poles thereof, which switching-module voltage corresponds to a positive or negative energy-store voltage or a voltage having the value of zero. A control apparatus for controlling the switching modules is provided, which control apparatus is configured to control the switching modules in such a way that a periodic longitudinal voltage can be produced at the module series circuit. A method for controlling a load flow in an alternating-voltage network is performed by the device.
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公开(公告)号：US09941698B2
公开(公告)日：2018-04-10
申请号：US15538662
申请日：2016-01-06
CPC分类号： H02J3/18 , H02J3/1814 , H02M5/04 , Y02E40/18
摘要： Legacy automatic variable capacitor KVAR compensation systems typically use either electromechanical devices such as relays or contactors of various forms and types to switch the selected capacitors in and out of the electrical system under some form of electronic control. These systems are slow and discontinuous in their ability to closely regulate the exact value of compensatory capacitance needed to compensate the variable and rapidly changing reactive power KVAR in the electrical power transmission and distribution networks. The present invention provides a fast response active KVAR compensator based on a variable transimpedance topology.
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公开(公告)号：US20170235322A1
公开(公告)日：2017-08-17
申请号：US15400262
申请日：2017-01-06
发明人： Mustapha RAHMANI , Yann HERRIOT , Caroline GUYON-AUBERT , David GUALINO , Alain DENTELLA , Sylvain LECHAT-SANJUAN , Grace GANDANEGARA
CPC分类号： G05F1/66 , G05B2219/2619 , H02J3/1814 , H02J3/1821 , H02J3/38 , H02J3/382 , H02J5/00 , Y02E40/18 , Y02P80/14
摘要： A method for controlling a virtual generator including at least one renewable power source, an accumulation system including a power and/or energy reserve, an inverter and a control law, the virtual generator delivering an active P/reactive Q electrical power of voltage V and of current I to a microgrid, the voltage V and current I having a frequency f, the active P/reactive Q electrical power controlling, via droop control, the frequency f and the RMS voltage Vrms of the voltage V, respectively, the method including control of the virtual generator via the control law for which it carries out an adjustment of the active P/reactive Q power delivered to the microgrid, the adjustment being capable of compensating for a variation in the active/reactive power consumed by the microgrid.
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99.发明申请公开(公告)号：US20170235286A1
公开(公告)日：2017-08-17
申请号：US15068397
申请日：2016-03-11
申请人： Smart Wires Inc.
发明人： Haroon Inam , Debrup Das , Frank Kreikebaum , Amrit Iyer , Aaron Zhao
IPC分类号： G05B19/042
CPC分类号： H02J13/0006 , H02J3/1814 , Y02E40/10 , Y02E40/18 , Y02E40/74 , Y04S10/22
摘要： Distributed static synchronous series compensators (DSSSCs) which may also be designated tower routers capable of injecting series inductive or capacitive impedances to enable distributed power-flow control. When a large number of these (a fleet of) DSSSCs are distributed over the grid for power-flow control, it is necessary to ensure that coordinated communication and control capabilities are also established, enabling fast reaction to changes that can exist across the grid. A system architecture and method for enabling localized high-speed low-latency intelligent control with communications between subsections (local network) of the grid along with communication to the central Grid operations center at the utility for supervisory control is disclosed herein. The architecture provides sub-cyclic (
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100.发明授权公开(公告)号：US09385582B2
公开(公告)日：2016-07-05
申请号：US14366221
申请日：2013-06-27
发明人： Ping Zheng , Hangbin Song , Xiaoyan Han
CPC分类号： H02M1/00 , H02J3/1814 , H02J3/385 , H02M1/36 , H02M7/44 , H02M2001/0003 , Y02E10/58 , Y02E40/18
摘要： A method and an apparatus for controlling a Low Voltage Ride Through of a photovoltaic grid-connected inverter. The method for controlling comprises: judging whether a voltage value of a grid is smaller than an upper limit of a low voltage value and is not greater than a lower limit of the low voltage value; when it is judged that a root mean square value of the voltage in the grid is smaller than the upper limit of the low voltage value and greater than the lower limit of the low voltage value, controlling an active current value outputted from the inverter to be equal to a target active current value and controlling a reactive current value outputted to be equal to a target reactive current value, so that a comparison difference between a total current outputted by the inverter in a Low Voltage Ride Through state and a current outputted by the inverter in a normal state is smaller than a preset value. The method and apparatus settle problem that the poor stability is caused since control on the waveform and amplitude of the current is ignored in the Low Voltage Ride Through control on the inverter, such that the total current changes slightly before and after a voltage dip, which can support and stabilize the grid.
摘要翻译： 一种用于控制光伏并网逆变器的低电压穿越的方法和装置。 所述控制方法包括：判定电网的电压值是否小于低电压值的上限，并且不大于所述低电压值的下限值; 当判定电网中的电压的均方根值小于低电压值的上限并且大于低电压值的下限时，将从逆变器输出的有功电流值控制为 等于目标有功电流值，并将输出的无功电流值控制为等于目标无功电流值，使得在低电压穿越状态下由逆变器输出的总电流与由该电流输出的电流之间的比较差 正常状态下的逆变器小于预设值。 该方法和装置解决了由于在逆变器的低电压穿越控制中忽略了对电流的波形和幅度的控制而导致的稳定性差的问题，使得总电流在电压下降之前和之后略有变化，其中 可以支持和稳定电网。
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