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    Apparatus and method of detecting ground fault of solar power generation system
    1.
    发明授权
    Apparatus and method of detecting ground fault of solar power generation system 失效
    太阳能发电系统接地故障检测装置及方法

    公开(公告)号：US06930868B2

    公开(公告)日：2005-08-16

    申请号：US10055988

    申请日：2002-01-28

    申请人： Hiroshi Kondo ,  Naoki Manabe ,  Nobuyoshi Takehara

    发明人： Hiroshi Kondo ,  Naoki Manabe ,  Nobuyoshi Takehara

    IPC分类号： H02H3/16 ,  G01R31/02 ,  H02H3/33 ,  H02H7/122 ,  H02J3/38 ,  H02M7/48 ,  H02H3/00

    CPC分类号： H02H7/1222 ,  H02H3/337

    摘要： In a solar power generation system which causes a non-insulated type inverter to convert DC power generated by a solar battery into AC power and outputs the AC power to a commercial power system, in detecting a ground fault, the differential current between the output lines of the solar battery is detected, an AC leakage current component due to the capacitance to ground of the solar battery is removed from the differential current, and it is determined whether a ground fault state has occurred by comparing a current value after removal of the AC leakage current component with a predetermined threshold value. With this arrangement, a false ground fault state determination that is caused by the influence of the AC leakage current component due to the electrostatic capacitance although the DC current path can be prevented, and a ground fault state can accurately be determined.

    摘要翻译： 在使非绝缘型逆变器将由太阳能电池产生的直流电转换为交流电力并将交流电输出到商用电力系统的太阳能发电系统中，在检测到接地故障时，输出线之间的差动电流 检测到太阳能电池的由于太阳能电池的接地电容引起的AC漏电流成分从差动电流中除去，通过比较AC去除后的电流值来确定是否发生了接地故障状态 具有预定阈值的漏电流分量。 利用这种布置，尽管可以防止DC电流路径，但是由于静电电容引起的AC漏电流分量的影响引起的错误接地故障状态确定，并且可以准确地确定接地故障状态。

    AC interconnection apparatus for supplying AC power from a commercial power system and from a solar cell
    2.
    发明授权
    AC interconnection apparatus for supplying AC power from a commercial power system and from a solar cell 失效
    交流互联装置，用于从商用电力系统和太阳能电池提供交流电力

    公开(公告)号：US06761581B2

    公开(公告)日：2004-07-13

    申请号：US10435052

    申请日：2003-05-12

    申请人： Nobuyoshi Takehara ,  Hiroshi Kondo

    发明人： Nobuyoshi Takehara ,  Hiroshi Kondo

    IPC分类号： H01R1100

    CPC分类号： H02J3/383 ,  Y02E10/563 ,  Y10S323/906 ,  Y10T307/615 ,  Y10T307/658 ,  Y10T307/696 ,  Y10T307/729

    摘要： An AC interconnection apparatus has an input terminal for a commercial power system, a connection terminal to a solar cell, an output terminal connected to a load, an inverter for converting the output voltage of the solar cell into an AC voltage, and a current detector arranged on the load side of an AC connection point for connecting the AC output from the inverter and the commercial power. When a power value calculated on the basis of a current detection value by the current detector and the voltage of the commercial power system is less than the output power of the inverter, the output of the inverter is suppressed, thereby suppressing reverse power flow to the commercial power system. When the current value detected by the current detector exceeds a predetermined value, power supply to the load is stopped using a breaker.

    摘要翻译： 交流互联装置具有商用电力系统的输入端子，太阳能电池的连接端子，与负载连接的输出端子，将太阳能电池的输出电压变换为交流电压的逆变器，以及电流检测器 布置在交流连接点的负载侧，用于连接逆变器的交流输出和商用电源。 当基于电流检测器的电流检测值计算出的功率值和商用电力系统的电压小于逆变器的输出功率时，逆变器的输出被抑制，从而抑制逆向功率流向 商业电力系统。 当由电流检测器检测到的电流值超过预定值时，使用断路器停止对负载的供电。

    Photovoltaic power generation apparatus
    3.
    发明授权
    Photovoltaic power generation apparatus 失效
    光伏发电装置

    公开(公告)号：US6107560A

    公开(公告)日：2000-08-22

    申请号：US071299

    申请日：1998-05-01

    申请人： Nobuyoshi Takehara ,  Hiroshi Kondo ,  Seiji Kurokami

    发明人： Nobuyoshi Takehara ,  Hiroshi Kondo ,  Seiji Kurokami

    IPC分类号： H01L31/042 ,  H01L31/048 ,  H02H3/33 ,  H02J3/38 ,  H01L25/00

    CPC分类号： H01L31/048 ,  H01L31/02021 ,  H02J3/38 ,  Y02E10/50

    摘要： A solar cell array used in a photovoltaic power generation apparatus for housing covers a relatively large outside area for installation, and a considerably large earth capacitance Ca exists between the solar cell array and the ground. Further, as an inverter for converting direct-current electric power generated by the solar cell array into alternating-current electric power, a transless-type inverter is used for reducing cost. Therefore, a slight leak current flows via the earth capacitance Ca, which may cause undesirable operation of an earth leakage circuit breaker inserted between the inverter and a commercial AC power system. In the photovoltaic power generation apparatus of the present invention, by designing it so that the relationship between the earth capacitance Ca[.mu.F] and leak current detection sensitivity EL[mA] of the earth leakage circuit breaker is Ca

    摘要翻译： 在太阳电池阵列和地面之间，用于壳体的光伏发电装置中使用的太阳能电池阵列覆盖相对较大的外部区域用于安装，并且存在相当大的接地电容Ca。 此外，作为将由太阳能电池阵列产生的直流电力转换为交流电力的逆变器，使用无转型逆变器来降低成本。 因此，微小的漏电流经由接地电容Ca流动，这可能导致插入逆变器和商用AC电力系统之间的漏电断路器的不期望的操作。 在本发明的太阳能发电装置中，通过设计使得漏电断路器的接地电容Ca [μF]与漏电流检测灵敏度EL [mA]之间的关系为Ca

    AC interconnection apparatus supplying AC power from a commercial power system and from a solar cell
    4.
    发明授权
    AC interconnection apparatus supplying AC power from a commercial power system and from a solar cell 失效
    用于从商用电力系统提供AC电力的交流互连装置和来自太阳能电池的输出及其控制方法

    公开(公告)号：US06605881B2

    公开(公告)日：2003-08-12

    申请号：US09984391

    申请日：2001-10-30

    申请人： Nobuyoshi Takehara ,  Hiroshi Kondo

    发明人： Nobuyoshi Takehara ,  Hiroshi Kondo

    IPC分类号： H02J900

    CPC分类号： H02J3/383 ,  Y02E10/563 ,  Y10S323/906 ,  Y10T307/615 ,  Y10T307/658 ,  Y10T307/696 ,  Y10T307/729

    摘要： An AC interconnection apparatus has an input terminal for a commercial power system, a connection terminal to a solar cell, an output terminal connected to a load, an inverter for converting the output voltage of the solar cell into an AC voltage, and a current detector arranged on the load side of an AC connection point for connecting the AC output from the inverter and the commercial power. When a power value calculated on the basis of a current detection value by the current detector and the voltage of the commercial power system is less than the output power of the inverter, the output of the inverter is suppressed, thereby suppressing reverse power flow to the commercial power system. When the current value detected by the current detector exceeds a predetermined value, power supply to the load is stopped using a breaker.

    摘要翻译： 交流互联装置具有商用电力系统的输入端子，太阳能电池的连接端子，与负载连接的输出端子，将太阳能电池的输出电压变换为交流电压的逆变器，以及电流检测器 布置在交流连接点的负载侧，用于连接逆变器的交流输出和商用电源。 当基于电流检测器的电流检测值计算出的功率值和商用电力系统的电压小于逆变器的输出功率时，逆变器的输出被抑制，从而抑制逆向功率流向 商业电力系统。 当由电流检测器检测到的电流值超过预定值时，使用断路器停止对负载的供电。

    Solar power generation apparatus and control method therefor
    5.
    发明授权
    Solar power generation apparatus and control method therefor 失效
    太阳能发电装置及其控制方法

    公开(公告)号：US06593520B2

    公开(公告)日：2003-07-15

    申请号：US09791588

    申请日：2001-02-26

    申请人： Hiroshi Kondo ,  Naoki Manabe ,  Nobuyoshi Takehara

    发明人： Hiroshi Kondo ,  Naoki Manabe ,  Nobuyoshi Takehara

    IPC分类号： H01L31042

    CPC分类号： H01L31/02021 ,  H02S50/10 ,  Y02E10/50 ,  Y10S136/291 ,  Y10S136/293 ,  Y10S323/906

    摘要： When a ground fault occurs in some solar battery string, this solar battery string may be disconnected and operation of a solar power generation system may be continued. If the open-circuit voltage of the solar battery string is high, a safety problem arises. If the open-circuit voltage is decreased, the conversion efficiency decreases. Therefore, an intermediate switch is provided midway along the solar battery string. When a ground fault occurs, this solar battery string where the ground fault has occurred is divided into substrings.

    摘要翻译： 当一些太阳能电池串中发生接地故障时，该太阳能电池串可能被断开，太阳能发电系统的运行可能继续。 如果太阳能电池串的开路电压高，则出现安全问题。 如果开路电压降低，则转换效率降低。 因此，在太阳能电池串的中间设置中间开关。 当接地故障发生时，发生接地故障的太阳能电池串分为子串。

    Photovoltaic power generation apparatus and control method thereof
    9.
    发明授权
    Photovoltaic power generation apparatus and control method thereof 有权
    光伏发电装置及其控制方法

    公开(公告)号：US06169678A

    公开(公告)日：2001-01-02

    申请号：US09491870

    申请日：2000-01-27

    申请人： Hiroshi Kondo ,  Naoki Manabe ,  Nobuyoshi Takehara

    发明人： Hiroshi Kondo ,  Naoki Manabe ,  Nobuyoshi Takehara

    IPC分类号： H02J710

    CPC分类号： H02J3/383 ,  H01L31/02021 ,  H02J3/385 ,  Y02E10/563 ,  Y02E10/58 ,  Y10S323/906

    摘要： A photovoltaic power generation apparatus having a plurality of power converters, respectively connected to a plurality of solar battery arrays, for converting direct-current power generated by the solar battery arrays to alternating-current power so as to provide the alternating-current power to a commercial power system. The photovoltaic power generation apparatus is so constructed that the plurality of power converters do not simultaneously suspend operation when an abnormal state is detected, in order to prevent generation of an electrical stress or reduction of the power generation amount caused by simultaneous operation suspension of the power converters or repeated operation suspension and operation resume. When the power generation amount of each solar battery array is different, a power converter connected to the solar battery array of the smallest power generation amount is set in the first-to-suspend condition.

    摘要翻译： 一种具有分别连接到多个太阳能电池阵列的多个功率转换器，用于将由太阳能电池阵列产生的直流电转换为交流电力以便向交流电源提供交流电力的光伏发电装置 商业电力系统。 光伏发电装置的结构使得当检测到异常状态时，多个电力转换器不会同时暂停操作，以便防止由电力同时停止引起的电应力的产生或发电量的降低 转换器或重复操作暂停和运行恢复。 当每个太阳能电池阵列的发电量不同时，连接到最小发电量的太阳能电池阵列的电力转换器被设置在第一到暂停状态。