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公开(公告)号：US10263550B2
公开(公告)日：2019-04-16
申请号：US15535488
申请日：2014-12-19
申请人： Hitachi, Ltd.
IPC分类号： H02P9/00 , F02C3/10 , F01D15/10 , H02P9/04 , H02P101/25
摘要： A gas turbine power generation system having an improved function to stabilize the power system is disclosed. The gas turbine power generation system has a dual-shaft gas turbine, an electric generator mechanically connected to a low pressure turbine of the dual-shaft gas turbine and electrically connected to an electric power system, a rotary electric machine mechanically connected to a high pressure turbine through a compressor of the dual-shaft gas turbine and electrically connected to the electric power system, wherein a power oscillation is suppressed by operation of the rotary electric machine as a motor or as a generator.
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公开(公告)号：US09935578B2
公开(公告)日：2018-04-03
申请号：US15615585
申请日：2017-06-06
申请人： Hitachi, Ltd.
摘要： A control device of a power converter controls a system including a converter that converts alternating current (AC) power of a power supply into direct current (DC) power, an inverter that converts the DC power into AC power, a capacitor that is charged with and discharges the DC power, and a rotary electric machine that is driven by the AC power supplied from the inverter or regenerates the AC power to the power supply, the control device including: a vibration suppression control unit that outputs a torque current command correction value for canceling an axial vibration component due to a vibration frequency of a transmission system including the rotary electric machine and an output compensation control unit that outputs a correction value for suppressing AC power of the power supply fluctuated by the vibration suppression control unit to a voltage control unit of the converter.
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公开(公告)号：US10358984B2
公开(公告)日：2019-07-23
申请号：US15533115
申请日：2014-12-18
申请人： Hitachi, Ltd.
IPC分类号： F02C3/10 , F02C6/00 , F02C9/00 , F02C9/20 , H02J3/40 , H02K7/18 , H02P9/04 , F01D15/10 , H02J15/00 , H02P101/25
摘要： The gas turbine power generation system of the present invention repeats either the supply or absorption of power, in addition to generating power. A frequency converter for converting a frequency of power is connected between the rotating electrical machine and a power system via a power line, and a controller obtains a request for an output from the gas turbine power generation system and controls the combustor on the basis of the request. With respect to the frequency converter, the controller performs frequency converter control for changing the rotational speed of the rotating electrical machine on the basis of the request. The rotating electrical machine supplies or absorbs power in accordance with the change in the rotational speed. With respect to the speed adjustment mechanism, the controller performs speed adjustment mechanism control for setting the rotational speed to a reference value.
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公开(公告)号：US10094297B2
公开(公告)日：2018-10-09
申请号：US15323458
申请日：2014-09-09
申请人： Hitachi, Ltd.
摘要： In order to enhance the tracking performance of power generation equipment with respect to a load variation and increase the reliability of the power generation equipment, a dynamic characteristic model simulating the dynamic characteristics of a multi-shaft gas turbine is used to calculate an output prediction value of a first power generator in a case where a combustor is controlled so as to match the output of the first power generator to an output target value; on the basis of the output target value and the output prediction value of the first power generator, a first power generator output instruction value as an instruction value for the output from the first power generator to a power system and a second power generator output instruction value as an instruction value for the output from a second power generator to the power system are calculated; and the combustor is controlled on the basis of the first power generator output instruction value and a frequency convertor is controlled on the basis of the second power generator output instruction value.
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公开(公告)号：US10084405B2
公开(公告)日：2018-09-25
申请号：US15548173
申请日：2015-02-16
申请人： HITACHI, LTD.
IPC分类号： H02P3/14 , H02P27/14 , H02M7/537 , F02C7/32 , F04D25/06 , H02P27/08 , H02M7/5387 , H02M1/08 , H02P101/25
CPC分类号： H02P27/14 , F02C7/32 , F04D25/06 , F05D2220/32 , F05D2220/76 , H02M1/08 , H02M1/081 , H02M7/537 , H02M7/53871 , H02P3/14 , H02P27/08 , H02P2101/25 , H02P2209/01 , H05K999/99
摘要： A control device for power conversion device controls a power conversion device in a system driven by the power conversion device to which an electric motor outputs AC power, and includes: a control pulse generation unit configured to generate a control pulse of the power conversion device; and a negative phase creation unit configured to input a pulse signal output by the control pulse generation unit and rotational speed information of the electric motor, and to generate an inverted signal of an output signal of the control pulse generation unit, wherein the pulse signal of a half cycle during one cycle of voltage, the pulse signal being generated by the control pulse generation unit, and a pulse signal of a next half cycle during the one cycle of voltage, the pulse signal being generated by the negative phase creation unit, are symmetrical in positive and negative relationship of voltage.
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