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1. 发明专利

JP2008092697A Method and device for controlling power conversion equipment connected with distribution system 有权
标题翻译：用于控制与分配系统连接的功率转换设备的方法和装置
公开(公告)号：JP2008092697A
公开(公告)日：2008-04-17
申请号：JP2006271801
申请日：2006-10-03
申请人： Central Res Inst Of Electric Power Ind , Hitachi Ltd , 株式会社日立製作所 , 財団法人電力中央研究所
发明人： ITO TOMOMICHI , KATO SHUJI , KOSEKI SHOICHIRO , SAKAI HIROMITSU , TAKASAKI MASAHIRO , OKADA YUKO
IPC分类号： H02M7/00
摘要： PROBLEM TO BE SOLVED: To solve such problem that there is possibility that a zero-phase current might flow from a system 109 via a diode built in a converter 102 while the gate of one converter 101 deblocks and the gate of the other converter 102 blocks, which might cause the malfunction of a ground detecting relay 116 or the erroneous break of a breaker 118, in power conversion equipment 100 which has voltage type PWM converters 101 and 102, which interconnect with AC systems 108 and 109 connected with a common transformer 123 without a transformer and share a DC part, and electromagnetic contactors 106 and 107 which are installed between these AC terminals and the above AC systems. SOLUTION: At start of the power conversion equipment, one PWM converter 101 is started, and when starting residual PWM converter 102 after that, the time until deblocking the gate of the converter after turning on an electromagnetic contactor 107 connected with the converter 102 is set shorter than the working time of the ground detecting relay 116 of the connected AC system 109. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了解决这样一个问题，即当一个转换器101的栅极解锁并且另一个转换器101的栅极被解锁时，存在零相电流可能经由内置在转换器102中的二极管从系统109流出的可能性转换器102块，其可能导致接地检测继电器116的故障或断路器118的错误断开，该电力转换设备100具有电压型PWM转换器101和102，其与与AC连接的AC系统108和109相互连接没有变压器并共用直流部分的公共变压器123以及安装在这些AC端子和上述AC系统之间的电磁接触器106和107。解决方案：在电源转换设备启动时，启动一个PWM转换器101，之后启动剩余PWM转换器102之后，在接通与转换器连接的电磁接触器107之后直到去转换转换器的栅极的时间 102设定为短于连接的AC系统109的接地检测继电器116的工作时间。版权所有：（C）2008，JPO＆INPIT

2. 发明专利

JP2006074849A Self-excited converter and electromagnetic power unit for accelerator 审中-公开
标题翻译：用于加速器的自激式转换器和电动力单元
公开(公告)号：JP2006074849A
公开(公告)日：2006-03-16
申请号：JP2004251782
申请日：2004-08-31
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KOSEKI SHOICHIRO , KUBO HIROSHI , OGAWA SHINICHI , KATO SHUJI
IPC分类号： H02M7/493 , H02M7/497
摘要： PROBLEM TO BE SOLVED: To control a current in a small current area with high accuracy. SOLUTION: This self-excited converter 1 where a plurality of choppers 2a-2d are multiple-connected in parallel, is equipped with a constant current control circuit 51 which makes an output current i follow a current set value d1, a constant voltage control circuit 52 which performs integral control to accord a voltage set value d2 being the output of the constant current control circuit 51 with the output voltage v of the voltage set value d2, and a PWM circuit 53 which regulates output voltages of choppers 2a-2d by modulating a signal wave d3 being the output signal of the constant voltage control circuit 52. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：以高精度控制小电流区域中的电流。解决方案：其中多个斩波器2a-2d并联多并联的自激变换器1配备有恒流控制电路51，其使输出电流i遵循当前设定值d1，常数电压控制电路52，其进行积分控制，以使电压设定值d2为恒定电流控制电路51的输出端与电压设定值d2的输出电压v; PWM电路53，其调节斩波器2a- 通过调制作为恒压控制电路52的输出信号的信号波d3来进行调制。（C）版权所有（C）2006，JPO＆NCIPI

3. 发明专利

JP2007006627A Voltage source type self-excited converter 有权
标题翻译：电压源类型自激式转换器
公开(公告)号：JP2007006627A
公开(公告)日：2007-01-11
申请号：JP2005184254
申请日：2005-06-24
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KATO SHUJI , KOSEKI SHOICHIRO , KUBO HIROSHI , OGAWA SHINICHI
IPC分类号： H02M7/12 , H05H7/04 , H05H13/04
摘要： PROBLEM TO BE SOLVED: To provide a voltage source type self-excited converter for an accelerator system capable of retaining high beam accuracy, even at a location that has a large impedance for the power system.
SOLUTION: This voltage source type self-excited converter includes a converter section for converting AC into DC, in which one end connects an AC system and the other end connects a load fluctuating during a certain period; a chopper section for inputting DC output of the converter section and flowing a current through the load, on the basis of a current command value with periodicity; and a controller of the converter section. The controller of the converter section inputs DC output voltages of the converter section, sampling the DC voltages for a period multiplying the fluctuating period of the load by natural numbers, calculating the moving average of sampled DC voltage detecting values, controlling the DC output voltages of the converter using the moving average value and the DC voltage command value of the converter.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：即使在电力系统具有大的阻抗的位置，为能够保持高光束精度的加速器系统提供电压源式自激变换器。解决方案：该电压源式自激变换器包括一个转换器部分，用于将AC转换为DC，其中一端连接一个AC系统，另一端连接一段时间内波动的负载; 基于具有周期性的电流指令值，切换转换器部分的直流输出并使电流流过负载的斩波器部分; 和转换器部分的控制器。转换器部分的控制器输入转换器部分的直流输出电压，对直流电压进行采样，将负载的波动周期乘以自然数的周期，计算采样直流电压检测值的移动平均值，控制直流输出电压转换器使用转换器的移动平均值和直流电压指令值。版权所有（C）2007，JPO＆INPIT

4. 发明专利

JP2011172484A Flicker suppression device 审中-公开
标题翻译：闪光抑制装置
公开(公告)号：JP2011172484A
公开(公告)日：2011-09-01
申请号：JP2011114280
申请日：2011-05-23
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KOSEKI SHOICHIRO , ITO TOMOMICHI , AIHARA TAKASHI
IPC分类号： H02J3/16 , G05F1/66 , G05F1/70 , H02J3/18
CPC分类号： Y02E40/34
摘要： PROBLEM TO BE SOLVED: To solve the problem with a flicker suppression device, wherein operation of the device becomes unstable as current flowing from the flicker suppression device to a load becomes excessive by a resonance frequency when a capacitive device such as a filter is connected to the load in parallel.
SOLUTION: The flicker suppression device detects an effective current component of a load current and changes a compensation rate according to the magnitude of the effective current component. A compensating current is calculated from the detected load current through a notch filter. The compensating current is calculated by deducting the estimated filter current from an AC voltage. By obtaining a voltage when there is no load change, the voltage is controlled. The flicker suppression device can be used even if a capacitive device such as a harmonic filter is connected to a load circuit.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：解决的问题为了解决闪烁抑制装置的问题，其中当诸如滤波器的电容性装置（例如滤波器）时，由于从闪烁抑制装置流向负载的电流由于共振频率而过度的装置的操作变得不稳定并联连接到负载。解决方案：闪烁抑制装置检测负载电流的有效电流分量，并根据有效电流分量的大小改变补偿率。从检测到的负载电流通过陷波滤波器计算补偿电流。通过从AC电压中扣除估计的滤波电流来计算补偿电流。通过在无负载变化时获得电压，可以控制电压。即使将诸如谐波滤波器的电容性装置连接到负载电路，也可以使用闪烁抑制装置。版权所有（C）2011，JPO＆INPIT

5. 发明专利

JP2008199853A Device, system and method for compensating reactive power 有权
标题翻译：用于补偿反应动力的装置，系统和方法
公开(公告)号：JP2008199853A
公开(公告)日：2008-08-28
申请号：JP2007035144
申请日：2007-02-15
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KIYOFUJI YASUHIRO , KASHIWAZAKI HIROSHI , AIHARA TAKASHI , ITO TOMOMICHI , KOSEKI SHOICHIRO , EGUCHI YOSHIO , TANAKA SEIJI , KATO TETSUYA , IMAZU YASUHIRO
IPC分类号： H02J3/18 , G05F1/70
CPC分类号： Y02E40/12 , Y02E40/16
摘要： PROBLEM TO BE SOLVED: To restrain power fluctuation generated on a consumer side by a power supply side. SOLUTION: This reactive power compensation system includes reactive power extracting means 80 which extracts a reactive current element from load current IL, reverse phase current extracting means 85 which extracts a reverse phase current element, amplitude phase computing means 60 which computes frequency characteristics for load admittance from the load current IL and linkage point voltage Vs, frequency specifying means 70 which specifies specific frequency based on amplitude characteristics and phase characteristics of the load admittance, a BEF 90 which removes the frequency element of the specific frequency, a BEF 95 which removes the frequency element of the specific element, and a power converter 20 which adds and outputs a compensation current formed from a positive phase current for canceling an output signal of the BEF 90 and a reverse phase current for canceling the output signal of the BEF 95 to the load current IL. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了抑制由电源侧在消费者侧产生的功率波动。解决方案：该无功补偿系统包括从负载电流IL提取无功电流元件的无功功率提取装置80，提取反相电流元件的反相电流提取装置85，计算频率特性的振幅相位计算装置60 用于从负载电流IL和联动点电压Vs的负载导纳，基于负载导纳的幅度特性和相位特性来指定特定频率的频率指定装置70，去除特定频率的频率元素的BEF 90，BEF 95 其去除特定元件的频率元件，以及功率转换器20，其将从正相电流形成的补偿电流用于抵消BEF90的输出信号和用于取消BEF的输出信号的反相电流 95到负载电流IL。版权所有（C）2008，JPO＆INPIT

6. 发明专利

JP2008017643A Power converter and control method thereof 有权
标题翻译：电力变换器及其控制方法
公开(公告)号：JP2008017643A
公开(公告)日：2008-01-24
申请号：JP2006187349
申请日：2006-07-07
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KATO SHUJI , KIYOFUJI YASUHIRO , KOSEKI SHOICHIRO , ITO TOMOMICHI , FUTAMI MOTOO
IPC分类号： H02M7/00
摘要： PROBLEM TO BE SOLVED: To provide a power converter that removes only a normal phase fundamental wave effective current component from a load current for creating a current command value, and can thereby reduce voltage fluctuation by variations in harmonics and the fluctuation of a system current. SOLUTION: A power converter connected to a load in parallel therewith comprises: a Fourier series expansion means that uses reference sinusoidal waves in synchronization with a system to perform the Fourier series of a load current, and outputs a coefficient; and a fundamental wave component calculation means for calculating a normal phase effective fundamental wave component of the load current from the coefficient of the Fourier series. In this case, an operation value obtained by subtracting the fundamental wave current from the load current should be set to be a current command of the power converter. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种从用于产生电流指令值的负载电流仅去除正相基波有效电流分量的功率转换器，从而可以通过谐波的变化和a的波动来减小电压波动系统电流。＆lt; P＆gt;解决方案：并联连接到负载的功率转换器包括：傅立叶级数扩展装置，其与系统同步地使用参考正弦波来执行载荷电流的傅里叶级数，并输出系数; 以及基波分量计算装置，用于根据傅里叶级数的系数计算负载电流的正相有效基波分量。在这种情况下，通过从负载电流中减去基波电流而获得的动作值应设定为电力转换器的电流指令。版权所有（C）2008，JPO＆INPIT

7. 发明专利

JP2007286781A Current control device and current control method 有权
标题翻译：电流控制装置和电流控制方法
公开(公告)号：JP2007286781A
公开(公告)日：2007-11-01
申请号：JP2006111507
申请日：2006-04-14
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： AIHARA TAKASHI , KOSEKI SHOICHIRO , KIYOFUJI YASUHIRO , ITO TOMOMICHI , KATO SHUJI
IPC分类号： G05F1/66
摘要： PROBLEM TO BE SOLVED: To effectively suppress voltage fluctuation of a power supply system even if the capacity of a device for supplying current to the power supply system is relatively small.
SOLUTION: A current of a path connecting the system to a load is detected, a predetermined target current component is separated from the detection result, and a near-maximum current and a near-minimum current in a predetermined range of the target current component are obtained. Based on the near-maximum current and the near-minimum current, an arithmetic value as a predetermined arithmetic result such that it is a value between a maximum current and a minimum current is obtained, and current is supplied to a path closer to the system-side voltage source than the load based on the arithmetic value. Consequently, even if the capacity of the device for supplying the current to the power supply system is relatively small, voltage fluctuation of the power supply system can be effectively suppressed.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了有效地抑制电源系统的电压波动，即使用于向电源系统供电的装置的容量相对较小。检测到将系统连接到负载的路径的电流，将预定的目标电流分量与检测结果分开，并且在目标的预定范围内的近最大电流和近最小电流获得电流分量。基于近最大电流和近最小电流，获得作为最大电流和最小电流之间的值的预定算术结果的算术值，并且将电流提供给靠近系统的路径边电压源比负载基于算术值。因此，即使向电力供给系统供给电流的装置的容量相对较小，也能够有效地抑制供电系统的电压波动。版权所有（C）2008，JPO＆INPIT

8. 发明专利

JP2005253190A Semiconductor power converter 有权
标题翻译：半导体电源转换器
公开(公告)号：JP2005253190A
公开(公告)日：2005-09-15
申请号：JP2004059957
申请日：2004-03-04
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： KATO SHUJI , OGAWA SHINICHI , KOSEKI SHOICHIRO
IPC分类号： H02M7/12
摘要： PROBLEM TO BE SOLVED: To prevent the biased magnetization of a transformer by suppressing a DC current component superimposed on an AC current at a system side.
SOLUTION: This semiconductor power converter detects the current at the system side, operates a moving average in a period integral multiple of a power variation cycle of a DC variation load, performs PI control so the operation result is zero, operates a system-side input voltage correction value of the converter, and sets a value subtracted with a difference between an input voltage command value of at the system side and the system-side input voltage correction value as a new system-side input voltage command value.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：通过抑制叠加在系统侧的AC电流上的直流电流分量来防止变压器的偏置磁化。
解决方案：该半导体功率转换器检测系统侧的电流，在直流变化负载的功率变化周期的整数倍的周期内进行移动平均，进行PI控制，运算结果为零，运行系统并且设定以系统侧的输入电压指令值和系统侧输入电压校正值之间的差减去的值作为新的系统侧输入电压指令值。版权所有（C）2005，JPO＆NCIPI

9. 发明专利

JP2009176236A Power conversion equipment 有权
标题翻译：电力转换设备
公开(公告)号：JP2009176236A
公开(公告)日：2009-08-06
申请号：JP2008016560
申请日：2008-01-28
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： AIHARA TAKASHI , KOSEKI SHOICHIRO , ITO TOMOMICHI
IPC分类号： G05F1/70 , H02J3/18 , H02M7/48
CPC分类号： Y02E40/30
摘要： PROBLEM TO BE SOLVED: To more effectively perform voltage variation suppression and to prevent current voltage constant control function necessary for power conversion equipment from being damaged by making effective current also usable for voltage variation suppression control as regards the power conversion equipment used for voltage variation suppression of a system. SOLUTION: The power conversion equipment 1 is provided with a power converter, a first current detector 5 for detecting output current of the power converter, a second current detector 7 for detecting load current at an interconnection point to the system of the power converter, a voltage detector 6 for detecting voltage at the interconnection point, a current command value generation system 10 for generating current command values 16 and 17 on the basis of the current signal 7s of the second current detector and the voltage signal 6s of the voltage detector, and a current control system 23 for controlling the power converter so as to make a current feedback value obtained from a current signal 5s by the first current detector coincide with the current command values, and is further provided with a compensation system 30 for calculating a compensation value 34 on the basis of the current signal 7s and the voltage signal 6s, and compensating the current command values with the compensation value. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：为了更有效地进行电压变化抑制，并且为了防止电力转换设备所需的电流恒定控制功能被损坏，也可以用于电压变化抑制控制的有效电流，该功率转换设备用于系统的电压变化抑制。电源转换装置1具备功率转换器，用于检测功率转换器的输出电流的第一电流检测器5，用于检测与功率系统的互连点的负载电流的第二电流检测器7 转换器，用于检测互连点电压的电压检测器6，根据第二电流检测器的电流信号7s和电压的电压信号6s产生电流指令值16和17的电流指令值产生系统10 检测器和用于控制功率转换器的电流控制系统23，以使得由第一电流检测器从当前信号5s获得的电流反馈值与当前指令值一致，并且还设置有用于计算的补偿系统30 基于当前信号7s和电压信号6s的补偿值34，并且用补偿器补偿当前指令值的价值。版权所有（C）2009，JPO＆INPIT

10. 发明专利

JP2008099436A Power converter 审中-公开
标题翻译：电源转换器
公开(公告)号：JP2008099436A
公开(公告)日：2008-04-24
申请号：JP2006278222
申请日：2006-10-12
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： IMAZU YASUHIRO , KATO TETSUYA , KIYOFUJI YASUHIRO , KOSEKI SHOICHIRO , ITO TOMOMICHI
IPC分类号： H02M7/12 , H02M7/497
摘要： PROBLEM TO BE SOLVED: To provide an arrangement of a power converter which can reduce oscillatory current flowing in the DC common part wiring of the converters that have different switching timings. SOLUTION: The power converter has a plurality of converters. A pulse generating means for supplying pulses to the plurality of converters generates pulses, by comparing a command value with a periodically changing reference value. The converters which constitute a group, the group comprising at least m-units of converters (m=number of converters) and are electrically connected adjacent to each other, have phase difference in the reference value for deciding the switching timing of the converter, to be plus or minus (360/n)×1±10 degrees (n, 1=arbitrary integers, and n>1) for the electrical angle, and are constituted to have a plurality of groups. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够减少在具有不同切换定时的转换器的直流公共部分布线中流动的振荡电流的功率转换器的布置。电源转换器具有多个转换器。用于向多个转换器提供脉冲的脉冲发生装置通过将命令值与周期性变化的参考值进行比较来产生脉冲。构成组的转换器，至少包括m个转换器组（m =转换器数）并相互电连接的转换器具有用于确定转换器的转换时序的参考值的相位差，对于电角度是正或负（360 / n）×1±10度（n，1 =任意整数，n> 1），并且被构成为具有多个组。版权所有（C）2008，JPO＆INPIT

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