HITACHI ENGINEERING & SERVICES CO., LTD.
|HITACHI ENGINEERING & SERVICES CO., LTD. Patent applications|
|Patent application number||Title||Published|
|20120306202||Wind Power Generation System and Method for Additional Installation of Wind Power Generator Therein - The present invention provides a wind power generation system capable of suppressing an increase in output variation involved in additional installation of a wind power generator without the need for a large storage battery capacity. For example, an output variation rate at a predetermined period of an existing wind power generator in an existing wind-power generating station is determined in advance, and charge/discharge control for a storage battery device is performed to reduce an output variation in a system output of the existing wind power generator so that an output variation rate of the wind-power generating system after the additional installation of the wind power generator does not exceed the determined output variation rate of the existing wind power generator.||12-06-2012|
|20120124268||CONTROL APPARATUS FOR PROCESS INPUT-OUTPUT DEVICE - A control apparatus for an input-output device includes a hardware part and a software part, in which a controller in the hardware part carries out a control operation in accordance with a signal from the input-output device, outputs a result of the control operation to a process, and has a timer unit to be excited at a constant period; and the software part has an information process part, a control process part, and an interrupt control unit to switch over the information process part and control process part one another, in which the interrupt control unit suspends an execution of the information process part to execute the control process part in priority and resume the information process part by switching over to the information process part from the control process part, when the execution of the control process part is terminated.||05-17-2012|
|20110193516||POWER STORAGE APPARATUS OF POWER GENERATION SYSTEM AND OPERATING METHOD OF POWER STORAGE APPARATUS - A power storage apparatus installed in connection with a power generation system using natural energy generation power.||08-11-2011|
|20100085043||EDDY CURRENT TESTING APPARATUS AND EDDY CURRENT TESTING METHOD - The eddy current testing apparatus includes a probe having an eddy current testing sensor including a pair of eddy current testing coils. The apparatus also includes an eddy current testing flaw detector inputting detection signals from the eddy current testing sensor. The diameter of a magnetic core used in each of the pair of eddy current testing coils is within the range of 0.1 mm to 0.5 mm.||04-08-2010|
|20100085042||EDDY CURRENT TESTING APPARATUS AND EDDY CURRENT TESTING METHOD - The eddy current testing apparatus includes a probe having an eddy current testing sensor including a pair of eddy current testing coils. The apparatus also includes an eddy current testing flaw detector inputting detection signals from the eddy current testing sensor. The diameter of a magnetic core used in each of the pair of eddy current testing coils is within the range of 0.1 mm to 0.5 mm.||04-08-2010|
|20090295162||WIND POWER GENERATION SYSTEM OF A TYPE PROVIDED WITH POWER STORAGE SYSTEM - A wind power generation system having a group of wind turbine generators includes a superior controller having a generation power recording memory to record a sum of a generation power of the group of wind turbine generators and a charge and discharge power of a power storage system, a charge and discharge power command computing device for computing a charge and discharge power command for the power storage system in a second period by making use of information of the output power in a first period computed in the output power computing unit and information of a detection value at the present of the generation power recording memory, and a charge and discharge power control device.||12-03-2009|
Patent applications by HITACHI ENGINEERING & SERVICES CO., LTD.