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1.发明申请PHOTOVOLTAIC INVERTER SYSTEM AND METHOD OF STARTING SAME AT HIGH OPEN-CIRCUIT VOLTAGE 有权光伏逆变器系统及其在高开路电压下启动的方法公开(公告)号：US20120026769A1
公开(公告)日：2012-02-02
申请号：US12845802
申请日：2010-07-29
IPC分类号： H02M7/48
CPC分类号： H02J3/383 , H02M3/1584 , H02M7/48 , Y02E10/563 , Y02E10/58
摘要： A power inverter system includes a DC to AC inverter configured to convert DC voltage from a DC power source to AC voltage. A DC link couples the DC power source and the inverter. An inverter pre-charger operates to pre-charge the inverter to achieve a desired DC link voltage prior to connecting the power inverter system to an AC power grid. A phased lock loop synchronizes the pre-charged inverter to the AC power grid prior to connecting the power inverter system to the AC power grid. The pre-charged inverter regulates the DC link voltage to about the minimum voltage level that allows control of AC grid currents via the inverter subsequent to connecting the power inverter system to the AC grid. The inverter operates in a maximum power point tracking control mode only subsequent to a first voltage transient caused by connecting the DC power source to energize the power inverter system.
摘要翻译： 电力逆变器系统包括被配置为将直流电压从直流电源转换成交流电压的直流到交流逆变器。 直流母线连接直流电源和逆变器。 在将电力逆变器系统连接到交流电网之前，逆变器预充电器用于对逆变器预充电以实现期望的直流链路电压。 在将电力逆变器系统连接到交流电网之前，相位锁定环将预充电的逆变器同步到交流电网。 预充电逆变器将直流母线电压调节到大约最小电压电平，允许在将电力逆变器系统连接到交流电网之后通过变频器控制交流电网电流。 只有在连接直流电源才能使功率逆变器系统通电的第一次电压瞬变之后，变频器才能工作在最大功率点跟踪控制模式。
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2.发明授权Photovoltaic inverter system and method of starting same at high open-circuit voltage 有权光伏逆变器系统及其在高开路电压下启动的方法公开(公告)号：US08395919B2
公开(公告)日：2013-03-12
申请号：US12845802
申请日：2010-07-29
IPC分类号： H02M7/537
CPC分类号： H02J3/383 , H02M3/1584 , H02M7/48 , Y02E10/563 , Y02E10/58
摘要： A power inverter system includes a DC to AC inverter configured to convert DC voltage from a DC power source to AC voltage. A DC link couples the DC power source and the inverter. An inverter pre-charger operates to pre-charge the inverter to achieve a desired DC link voltage prior to connecting the power inverter system to an AC power grid. A phased lock loop synchronizes the pre-charged inverter to the AC power grid prior to connecting the power inverter system to the AC power grid. The pre-charged inverter regulates the DC link voltage to about the minimum voltage level that allows control of AC grid currents via the inverter subsequent to connecting the power inverter system to the AC grid. The inverter operates in a maximum power point tracking control mode only subsequent to a first voltage transient caused by connecting the DC power source to energize the power inverter system.
摘要翻译： 电力逆变器系统包括被配置为将直流电压从直流电源转换成交流电压的直流到交流逆变器。 直流母线连接直流电源和逆变器。 在将电力逆变器系统连接到交流电网之前，逆变器预充电器用于对逆变器预充电以实现期望的直流链路电压。 在将电力逆变器系统连接到交流电网之前，相位锁定环将预充电的逆变器同步到交流电网。 预充电逆变器将直流母线电压调节到大约最小电压电平，允许在将电力逆变器系统连接到交流电网之后通过变频器控制交流电网电流。 只有在连接直流电源才能使功率逆变器系统通电的第一次电压瞬变之后，变频器才能工作在最大功率点跟踪控制模式。
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公开(公告)号：US08144490B2
公开(公告)日：2012-03-27
申请号：US12615566
申请日：2009-11-10
IPC分类号： H02M7/487
CPC分类号： H02M7/487 , H02M7/5395 , Y10S323/906
摘要： A method of operating a three level converter includes controlling the output voltage of the converter when a DC link voltage of the three level converter is lower than one-half of a rated DC link voltage of the converter by, for each leg of the converter, alternately connecting an output terminal of the leg to the positive terminal or the negative terminal of the DC link. When the DC link voltage is at least one-half of the rated DC link voltage, the method includes controlling the output voltage of the converter by, for each leg, selectively connecting the output terminal of the converter to the positive terminal, the negative terminal, or a mid-point of the DC link.
摘要翻译： 一种操作三电平转换器的方法包括：当三电平转换器的直流母线电压低于转换器的额定直流母线电压的一半时，通过转换器的每个支路来控制转换器的输出电压， 交替地将脚的输出端连接到DC链路的正极或负极。 当直流母线电压至少为额定直流母线电压的一半时，该方法包括通过对每个支路选择性地将转换器的输出端连接到正极端子来控制转换器的输出电压，负极端子 ，或DC链路的中点。
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公开(公告)号：US20110175662A1
公开(公告)日：2011-07-21
申请号：US12689410
申请日：2010-01-19
IPC分类号： H03L5/00
CPC分类号： H01L31/02021 , H02J3/383 , H02M1/36 , H02M7/797 , H02S40/32 , Y02E10/563
摘要： A method to clamp an open circuit voltage in a photovoltaic module is proposed. The method include coupling a load resistor across an inverter module, initiating the inverter module and loading the inverter module via the load resistor, and coupling the loaded inverter module to the photovoltaic module. The method further include dissipating power via the load resistor to clamp the open circuit voltage of the photovoltaic module, synchronizing an output voltage of the inverter module with a voltage of a grid and then coupling the inverter module to the grid and de-coupling the load resistor across the inverter module.
摘要翻译： 提出了一种在光伏模块中钳位开路电压的方法。 该方法包括将负载电阻器耦合到逆变器模块上，启动逆变器模块并通过负载电阻器加载逆变器模块，并将负载的逆变器模块耦合到光伏模块。 该方法还包括经由负载电阻器耗散功率以钳位光伏模块的开路电压，使逆变器模块的输出电压与电网的电压同步，然后将逆变器模块耦合到电网并使负载解耦 电阻穿过逆变器模块。
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公开(公告)号：US08194375B2
公开(公告)日：2012-06-05
申请号：US12689410
申请日：2010-01-19
IPC分类号： H02H3/20
CPC分类号： H01L31/02021 , H02J3/383 , H02M1/36 , H02M7/797 , H02S40/32 , Y02E10/563
摘要： A method to clamp an open circuit voltage in a photovoltaic module is proposed. The method include coupling a load resistor across an inverter module, initiating the inverter module and loading the inverter module via the load resistor, and coupling the loaded inverter module to the photovoltaic module. The method further include dissipating power via the load resistor to clamp the open circuit voltage of the photovoltaic module, synchronizing an output voltage of the inverter module with a voltage of a grid and then coupling the inverter module to the grid and de-coupling the load resistor across the inverter module.
摘要翻译： 提出了一种在光伏模块中钳位开路电压的方法。 该方法包括将负载电阻器耦合到逆变器模块上，启动逆变器模块并通过负载电阻器加载逆变器模块，并将负载的逆变器模块耦合到光伏模块。 该方法还包括经由负载电阻器耗散功率以钳位光伏模块的开路电压，使逆变器模块的输出电压与电网的电压同步，然后将逆变器模块耦合到电网并使负载解耦 电阻穿过逆变器模块。
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公开(公告)号：US20110109285A1
公开(公告)日：2011-05-12
申请号：US12615566
申请日：2009-11-10
IPC分类号： G05F1/10
CPC分类号： H02M7/487 , H02M7/5395 , Y10S323/906
摘要： A method of operating a three level converter includes controlling the output voltage of the converter when a DC link voltage of the three level converter is lower than one-half of a rated DC link voltage of the converter by, for each leg of the converter, alternately connecting an output terminal of the leg to the positive terminal or the negative terminal of the DC link. When the DC link voltage is at least one-half of the rated DC link voltage, the method includes controlling the output voltage of the converter by, for each leg, selectively connecting the output terminal of the converter to the positive terminal, the negative terminal, or a mid-point of the DC link.
摘要翻译： 一种操作三电平转换器的方法包括：当三电平转换器的直流母线电压低于转换器的额定直流母线电压的一半时，通过转换器的每个支路来控制转换器的输出电压， 交替地将脚的输出端连接到DC链路的正极或负极。 当直流母线电压至少为额定直流母线电压的一半时，该方法包括通过对每个支路选择性地将转换器的输出端连接到正极端子来控制转换器的输出电压，负极端子 ，或DC链路的中点。
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7.发明申请公开(公告)号：US20110141786A1
公开(公告)日：2011-06-16
申请号：US12893015
申请日：2010-09-29
申请人： Jie Shen , Stefan Schroeder , Robert Roesner
发明人： Jie Shen , Stefan Schroeder , Robert Roesner
IPC分类号： H02M7/537
CPC分类号： H02M7/487 , H02M2001/0025
摘要： A control system for a multilevel converter includes a differential mode current regulator, a neutral point (NP) controller and a PWM controller for generating switching pulses for the multilevel converter. The differential mode current regulator generates reference voltage command signals based on a difference between reference current command signals and actual current command signals, and the NP controller determines a modified neutral point current signal in response to a DC link voltage unbalance. The NP controller utilizes the modified neutral point current signal to generate a common mode reference voltage signal. The switching pulses are generated by the PWM controller based on the reference voltage command signals and the common mode reference voltage signal.
摘要翻译： 用于多电平转换器的控制系统包括差模电流调节器，中性点（NP）控制器和用于产生用于多电平转换器的开关脉冲的PWM控制器。 差分电流调节器基于参考电流指令信号和实际电流指令信号之间的差产生参考电压指令信号，并且NP控制器响应于直流链路电压不平衡来确定修正的中性点电流信号。 NP控制器利用修正的中性点电流信号产生共模参考电压信号。 开关脉冲由PWM控制器基于参考电压指令信号和共模参考电压信号产生。
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8.发明授权公开(公告)号：US08441820B2
公开(公告)日：2013-05-14
申请号：US12893015
申请日：2010-09-29
申请人： Jie Shen , Stefan Schroeder , Robert Roesner
发明人： Jie Shen , Stefan Schroeder , Robert Roesner
CPC分类号： H02M7/487 , H02M2001/0025
摘要： A control system for a multilevel converter includes a differential mode current regulator, a neutral point (NP) controller and a PWM controller for generating switching pulses for the multilevel converter. The differential mode current regulator generates reference voltage command signals based on a difference between reference current command signals and actual current command signals, and the NP controller determines a modified neutral point current signal in response to a DC link voltage unbalance. The NP controller utilizes the modified neutral point current signal to generate a common mode reference voltage signal. The switching pulses are generated by the PWM controller based on the reference voltage command signals and the common mode reference voltage signal.
摘要翻译： 用于多电平转换器的控制系统包括差模电流调节器，中性点（NP）控制器和用于产生用于多电平转换器的开关脉冲的PWM控制器。 差分电流调节器基于参考电流指令信号和实际电流指令信号之间的差产生参考电压指令信号，并且NP控制器响应于直流链路电压不平衡来确定修正的中性点电流信号。 NP控制器利用修正的中性点电流信号产生共模参考电压信号。 开关脉冲由PWM控制器基于参考电压指令信号和共模参考电压信号产生。
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公开(公告)号：US20110115532A1
公开(公告)日：2011-05-19
申请号：US12618810
申请日：2009-11-16
申请人： Robert Roesner , Stefan Schroeder , Jie Shen
发明人： Robert Roesner , Stefan Schroeder , Jie Shen
CPC分类号： H02M7/487 , H02M7/003 , H02M2001/0048 , H02M2001/007 , Y02B70/1491 , Y10T307/76
摘要： A method of operating a neutral point clamped (NPC) three level converter is provided. The NPC converter includes at least two legs, each leg comprising first and second top switches connected in series at a first mid point. The converter further includes first and second bottom switches connected in series at a second mid point, and first and second middle switches connected in series at a third mid point therebetween. The first top and second bottom switches are connected in series at a DC link and the first and the second middle switches are connected between the first and the second mid points. Each of the top, bottom and middle switches has an antiparallel diode thereacross. The method includes alternately switching the first and second top switches to ON state when the first middle switch is in ON state and the second middle switch is in OFF state. The method also includes alternately switching the first and the second bottom switches to ON state when the first middle switch is in OFF state and the second middle switch is in ON state.
摘要翻译： 提供了一种操作中性点钳位（NPC）三电平转换器的方法。 NPC转换器包括至少两个腿，每个腿包括在第一中点处串联连接的第一和第二顶部开关。 转换器还包括在第二中点串联连接的第一和第二底部开关，以及在它们之间的第三个中间点串联连接的第一和第二中间开关。 第一顶部和第二个底部开关在DC链路处串联连接，第一和第二中间开关连接在第一和第二中间点之间。 顶部，底部和中部开关中的每一个都具有反平行二极管。 该方法包括当第一中间开关处于导通状态并且第二中间开关处于断开状态时交替地将第一和第二顶部开关切换到接通状态。 该方法还包括当第一中间开关处于断开状态并且第二中间开关处于接通状态时交替地将第一和第二底部开关切换到接通状态。
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公开(公告)号：US08228695B2
公开(公告)日：2012-07-24
申请号：US12618810
申请日：2009-11-16
申请人： Robert Roesner , Stefan Schroeder , Jie Shen
发明人： Robert Roesner , Stefan Schroeder , Jie Shen
IPC分类号： H02M7/122
CPC分类号： H02M7/487 , H02M7/003 , H02M2001/0048 , H02M2001/007 , Y02B70/1491 , Y10T307/76
摘要： A method of operating a neutral point clamped (NPC) three level converter is provided. The NPC converter includes at least two legs, each leg comprising first and second top switches connected in series at a first mid point. The converter further includes first and second bottom switches connected in series at a second mid point, and first and second middle switches connected in series at a third mid point therebetween. The first top and second bottom switches are connected in series at a DC link and the first and the second middle switches are connected between the first and the second mid points. Each of the top, bottom and middle switches has an antiparallel diode thereacross. The method includes alternately switching the first and second top switches to ON state when the first middle switch is in ON state and the second middle switch is in OFF state. The method also includes alternately switching the first and the second bottom switches to ON state when the first middle switch is in OFF state and the second middle switch is in ON state.
摘要翻译： 提供了一种操作中性点钳位（NPC）三电平转换器的方法。 NPC转换器包括至少两个腿，每个腿包括在第一中点处串联连接的第一和第二顶部开关。 转换器还包括在第二中点串联连接的第一和第二底部开关，以及在它们之间的第三个中间点串联连接的第一和第二中间开关。 第一顶部和第二个底部开关在DC链路处串联连接，第一和第二中间开关连接在第一和第二中间点之间。 顶部，底部和中部开关中的每一个都具有反平行二极管。 该方法包括当第一中间开关处于导通状态并且第二中间开关处于断开状态时交替地将第一和第二顶部开关切换到接通状态。 该方法还包括当第一中间开关处于断开状态并且第二中间开关处于接通状态时交替地将第一和第二底部开关切换到接通状态。
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