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1. 发明申请

US20180138713A1 PHOTOVOLTAIC SYSTEM 审中-公开
公开(公告)号：US20180138713A1
公开(公告)日：2018-05-17
申请号：US15349158
申请日：2016-11-11
申请人： TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
发明人： Yuji MATSUOKA , Tatsuaki AMBO , Naoki FUJIWARA , Paul BIXEL , Ryuta SAKA
IPC分类号： H02J3/38 , H02J3/18
CPC分类号： H02J3/383 , H02J3/18 , H02J3/46 , H02J3/50 , Y02E10/563
摘要： A photovoltaic system includes photovoltaic cells, inverters, a reduced electricity output state determiner which determines whether each of the photovoltaic cells is in a reduced electricity output state, a first command value generator which generates a first command value for decreasing a first power factor of a first inverter determined as in the reduced electricity output state, a second command value generator which generates a second command value for increasing a second power factor of at least one of second inverters so as to compensate for output power of the first inverter, and a controller which controls the inverters.

2. 发明申请

US20180006579A1 CONTROL DEVICE OF INVERTER 有权
公开(公告)号：US20180006579A1
公开(公告)日：2018-01-04
申请号：US15543140
申请日：2015-01-13
申请人： TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
发明人： Yuji MATSUOKA , Tatsuaki AMBO
IPC分类号： H02M7/5395 , H02M1/42
CPC分类号： H02M7/5395 , H02J3/38 , H02M1/42 , H02M7/48 , Y02E10/563
摘要： A control device (2) of an inverter converts electrical power generated by a solar cell (3) into alternating current power connecting to an electric power system (7). The control device includes: an alternating current voltage sensor (14) sensing a system voltage (Vr) of the electric power system; an MPPT executer (23) controlling a direct current voltage (Vdc) applied to the inverter (1) to cause the electrical power output from the solar cell (3) to be a maximum when the direct current voltage (Vdc) is higher than a lower limit (VL); a direct current voltage lower limit calculator 22 reducing the lower limit (VL) when the system voltage (Vr) is lower than a predetermined voltage; and an electrical power controller (25) controlling reactive power based on the system voltage (Vr), the reactive power being output from the inverter (1).

3. 发明申请

US20160308464A1 INVERTER CONTROL APPARATUS 有权
标题翻译：逆变器控制装置
公开(公告)号：US20160308464A1
公开(公告)日：2016-10-20
申请号：US15187096
申请日：2016-06-20
申请人： Toshiba Mitsubishi-Electric Industrial Systems Corporation
发明人： Ruben Alexis INZUNZA FIGUEROA , Takeshi SUMIYA , Tatsuaki AMBO
IPC分类号： H02M7/537 , H02M1/14 , H02J3/38
CPC分类号： H02M7/537 , H02J3/383 , H02J3/385 , H02M1/12 , H02M1/126 , H02M1/14 , H02M1/32 , H02M7/48 , H02M7/5387
摘要： There is provided an inverter control apparatus, a capacitor being provided on an AC side of the inverter. The apparatus includes a system voltage detector detects a system voltage, a differentiation unit calculates a differential value of the system voltage, a correction current instruction value calculator calculates a correction current instruction value for correcting a current instruction value set for an output current of the inverter, based on the differential value of the system voltage, a current instruction value correction unit corrects the current instruction value, based on the correction current instruction value, and a controller controls the inverter based on the current instruction value.
摘要翻译：设置有逆变器控制装置，电容器设置在逆变器的AC侧。该装置包括系统电压检测器检测系统电压，微分单元计算系统电压的差分值，校正电流指令值计算器计算用于校正针对逆变器的输出电流设定的电流指令值的校正电流指令值基于系统电压的差分值，电流指令值校正单元基于校正电流指令值来校正当前指令值，并且控制器基于当前指令值来控制逆变器。

4. 发明申请

US20200044581A1 POWER CONVERSION DEVICE AND METHOD FOR OPERATING SAME 审中-公开
公开(公告)号：US20200044581A1
公开(公告)日：2020-02-06
申请号：US16074098
申请日：2016-10-11
申请人： TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
发明人： Tsuguhiro TANAKA , Tatsuaki AMBO , Masahiro KINOSHITA
IPC分类号： H02M7/515
摘要： According to an embodiment of the invention, a power conversion device that includes a power converter, a direct current capacitor, a voltage sensor, a rectifying element, an electromagnetic contactor, and a control circuit is provided. The power converter includes a pair of direct current terminals connected to a direct current power supply, includes multiple alternating current terminals connected to an electric power system of alternating current, converts direct current power input from the direct current power supply into alternating current power, and supplies the alternating current power to the electric power system. The direct current capacitor is connected between the pair of direct current terminals. The voltage sensor detects a voltage value of the direct current capacitor. The rectifying element is provided between the direct current capacitor and the direct current power supply and suppresses a reverse flow of electrical power from the power converter and the direct current capacitor into the direct current power supply. The electromagnetic contactor is connected in parallel with the rectifying element. The control circuit controls operations of the power converter and the electromagnetic contactor. In the case where the voltage value of the direct current capacitor detected by the voltage sensor is a prescribed value or more, the control circuit engages the electromagnetic contactor and supplies active power from the power converter to the electric power system; and in the case where the voltage value of the direct current capacitor detected by the voltage sensor is less than the prescribed value, the control circuit opens the electromagnetic contactor and supplies a reactive power from the power converter to the electric power system.

5. 发明申请

US20160233787A1 POWER CONVERSION DEVICE AND METHOD OF CONTROLLING THE SAME 有权
标题翻译：电力转换装置及其控制方法
公开(公告)号：US20160233787A1
公开(公告)日：2016-08-11
申请号：US15029881
申请日：2013-10-15
申请人： TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
发明人： Yuji MATSUOKA , Tatsuaki AMBO
IPC分类号： H02M7/48
CPC分类号： H02J7/35 , H02J3/1842 , H02J3/28 , H02J3/383 , H02M3/33507 , H02M7/48 , Y02E10/563 , Y02E10/566 , Y02E40/22
摘要： A power conversion device includes a smoothing capacitor, an input voltage detection unit, a power conversion unit, and a controller. The input voltage detection unit detects a voltage value of the input voltage. The power conversion unit converts a direct-current voltage smoothed by the smoothing capacitor into an alternating-current voltage to output the alternating-current voltage to a power system. The controller has a first operation mode of outputting active power to the power system, has a second operation mode of outputting reactive power to the power system, determines whether or not the voltage value is one of equal to and higher than a determination value, and makes a transition from the first operation mode to the second operation mode within a predetermined time from a time point when it is determined that the voltage value is lower than the determination value.
摘要翻译：电力转换装置包括平滑电容器，输入电压检测单元，电力转换单元和控制器。输入电压检测单元检测输入电压的电压值。功率转换单元将由平滑电容器平滑的直流电压转换为交流电压，以将交流电压输出到电力系统。控制器具有向电力系统输出有功功率的第一操作模式，具有向电力系统输出无功功率的第二操作模式，确定电压值是否等于并高于确定值，以及在从确定电压值低于确定值的时间点起的预定时间内，从第一操作模式转换到第二操作模式。

6. 发明公开

US20230261472A1 DISTRIBUTED-POWER-SUPPLY POWER CONVERSION SYSTEM 审中-公开
公开(公告)号：US20230261472A1
公开(公告)日：2023-08-17
申请号：US17754549
申请日：2020-02-07
申请人： TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
发明人： Issei FUKASAWA , Tatsuaki AMBO , Ruben Alexis INZUNZA FIGUEROA
IPC分类号： H02J3/38 , H02M7/493 , G01R31/40
CPC分类号： H02J3/38 , H02M7/493 , G01R31/40 , H02J2300/24
摘要： A distributed-power-supply power conversion system includes a plurality of power inverters configured to invert DC power to AC power; and a control device configured to select at least one power inverter from the plurality of power inverters as a power inverter used for testing, and configured to perform an energization test of the power inverter used for testing in a state where an AC side of the power inverter used for testing is disconnected from a system, and is connected to an AC power supply device and to a load bank, and a voltage on the AC side of the power inverter used for testing is established. The distributed-power-supply power conversion system can perform an energization test of a power inverter before a system receives power.

7. 发明申请

US20220320863A1 POWER CONVERSION APPARATUS AND POWER CONVERSION SYSTEM 有权
公开(公告)号：US20220320863A1
公开(公告)日：2022-10-06
申请号：US17310277
申请日：2019-07-02
申请人： TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
发明人： Chieko UMENO , Tatsuaki AMBO
IPC分类号： H02J3/18 , H02M1/00 , H02M7/537 , G05F1/70 , H02J3/38
摘要： A power conversion system includes plural power conversion apparatuses and a server connected to each of the plural power conversion apparatuses. Each of the plural power conversion apparatuses includes a power conversion circuit interconnected with a power system, a calculating unit configured to calculate, based on an output current and an output voltage of the power conversion circuit, at least one information of reactive power and a reactive current output by the power conversion circuit, a storing unit configured to accumulate, in a storage device, time-series reactive power information which is information associating time and the at least one information calculated by the calculating unit, and a communication interface configured to transmit the time-series reactive power information stored in the storage device to the server. The server is constructed to collect the time-series reactive power information of each of the plural power conversion apparatuses via the communication interface.

8. 发明申请

US20180366943A1 CONTROL DEVICE OF POWER CONVERTER 审中-公开
公开(公告)号：US20180366943A1
公开(公告)日：2018-12-20
申请号：US15739859
申请日：2015-07-03
申请人： TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATION
发明人： Yuji MATSUOKA , Tatsuaki AMBO
IPC分类号： H02H7/122 , H02M1/32 , H02M7/493
摘要： A control device 5 of a power converter generates individual current command values Ira to Ird based on a total current command value Ir of inverters 2a to 2d; controls the inverters 2a to 2d respectively based on the generated current command values Ira to Ird; senses at least one current of direct currents Iia to Iid or alternating currents Ioa to Iod for each of the inverters 2a to 2d; and suppresses the current command values Ira to Ird for each of the inverters 2a to 2d when the sensed current exceeds a current limit value, the current limit value being preset, the current limit value being lower than a current causing a protection operation to protect the inverters 2a to 2d.

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