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180results about How to "Reduce capacity" patented technology

A method and device for constructing a cross-platform software operating environment

Disclosed are a method and an apparatus for constructing a cross-platform software running environment. The method comprises: establishing an entrance of a cross-platform software running environment with a binary boot file; starting a decompression module, and executing a decompression operation on a core compilation and interpretation and graphics environment module; executing a decompression operation on a cross-platform visual software installation module; invoking the decompression module, and executing a decompression operation on a platform independent module and a multi-platform sharing module; executing a decompression operation on an extended compilation and interpretation and graphics environment module; and setting an environment variable of software installation package running according to difference among different system platforms, starting a visual software installation package interface, and executing visual installation of a cross-platform software installation package according to the visual software installation package interface. In the present invention, the use of a cross-platform software installation package facilitates reduction of the size of the software installation package and reduction of the capacity demand for a device storage module.
Owner:ZTE CORP

Multifunction device, method of controlling multifunction device, multifunction device control system, program, and recording medium

A multifunction device includes: a control command receiving section for receiving a control command from a control device; a criterion storage section for storing criterion in which command type information indicating control command types is associated with information indicating whether an authentication process is necessary or not; a command type determining section for determining whether the authentication process is necessary or not for the control command received by the control command receiving section; an access key checking section for performing the authentication process by matching the access key with an authentication key stored in advance, the access key checking section performing the authentication process if the access key checking section determines that the authentication process is necessary; and an Web service layer for executing a process as instructed by the control command, the Web service layer performing the process if the access key checking section that authentication is successful, or if the command type determining section determines that the authentication process is not necessary. This makes it possible to attain a multifunction device with a high security and with an ability to perform a process with a workload that is reduced as much as possible.
Owner:SHARP KK

Controlling method and controller for variable participation frequency of temperature control load

The invention belongs to the technical field of frequency control and relative technical field of demand side response in an intelligent power grid, aims at reducing capacity requirements on a spare generator unit and an energy storage device from system frequency control requirements, saves corresponding investment, and simultaneously avoids the problem about system 'secondary disturbance' prone to occurring during a conventional frequency controlling process. The technical scheme includes that a controlling method for variable participation frequency of temperature control load includes the steps of: (1) collecting current power grid frequency fmeas (advising a refrigerating chamber temperature Tc (n) for refrigerating equipment); (2) designing pf into a piecewise linear function in positive proportion to power grid frequency deviation; (3) calculating according to data of the step (1) and the step (2); (4) determining the next operation of a compressor of the refrigerating equipment according to the calculating result of the step (3); and (5), n=n+1, returning to the step (1) and starting the next cycle. The controlling method and a controller for the variable participation frequency of the temperature control load are mainly applied to manufacture of the refrigerating equipment.
Owner:TIANJIN UNIV

Method for regulating terminal voltage by reactive power support of double-fed wind generator unit and system thereof

The invention relates to a method for regulating terminal voltage by reactive power support of a double-fed wind generator unit and a system thereof. The method includes steps of initializing the system, measuring terminal voltage and calculating errors e, judging whether the errors e is in a dead zone or not and calculating reactive power reference QPI, calculating the maximum reactive power capacity Qmax, defining reactive power control commands Qout according to the QPI and Qmax, and driving the double-fed wind generator unit to send out corresponding reactive power according to the reactive power control commands Qout. The system comprises an electric energy mass module, a dead zone hysteresis comparator, a PI (proportional plus integral) controller, a reactive power capacitor calculation module, a current converter and the double-fed wind generator unit. The decoupling control characteristics of active power and reactive power of the double-fed wind generator unit are given full play, dynamic regulation of voltage of the double-fed wind generator unit is realized, and the quality of the power grid is improved. Meanwhile, capacity of an SVC (static var compensator) and an SVG (static var generator) of existing reactive regulating equipment are decreased and cost is reduced.
Owner:GUODIAN UNITED POWER TECH

Three-phase three-wire system mixed type integrated power system electric energy quality regulator

The invention relates to a three-phase three-wire system mixed type integrated power system electric energy quality regulator, and belongs to the technical field of electric automation equipment. The three-phase three-wire system mixed type integrated power system electric energy quality regulator comprises a series compensation module and a parallel compensation module, wherein the series compensation module is connected with a power system, the parallel compensation module is connected with power system loads, and the series compensation module and the parallel compensation module are connected through a direct current bus. According to the electric energy quality regulator, a filter capacitor is added in the parallel compensation module, a three-phase converter in the parallel compensation module is enabled to only provide harmonic voltages, volume of the three-phase converter is lowered, device cost can be saved and work efficiency can be improved; the regulator can be used in a medium-voltage environment without a coupling transformer; the filter capacitor is added in the parallel compensation module, harmonic waves are compensated to the power system, and a certain reactive current can be provided for the loads at the same time; and compensation effect is good, cost performance is high, and application range is wide.
Owner:TSINGHUA UNIV

Hybrid energy storage photovoltaic power generation system based on power prediction method

ActiveCN103762616AReduce capacityImprove energy storage utilizationPV power plantsSingle network parallel feeding arrangementsPower differencePower grid
The invention provides a hybrid energy storage photovoltaic power generation system based on a power prediction method. The hybrid energy storage photovoltaic power generation system based on the power prediction method comprises an energy storage unit and an inverter, wherein the energy storage unit and the inverter are connected with an energy storage controller. The energy storage controller comprises a control module, a photovoltaic power prediction module and a DC-DC power module; the control module is used for adjusting the operating mode of the energy storage unit; the photovoltaic power prediction module is used for predicting photovoltaic power generation power according to output power of a photovoltaic battery in the system and sending a power prediction value to the inverter. Compared with the prior art, the hybrid energy storage photovoltaic power generation system based on the power prediction method can reduce the capacity of the energy storage unit and improve the utilization rate of stored energy; due to the fact that the energy storage unit does not need to be started frequently to compensate the power difference between the photovoltaic battery and the inverter, the service life of the energy storage unit is prolonged; an inverter output curve is smoothed, and therefore the impact on a power grid is reduced.
Owner:STATE GRID CORP OF CHINA +1
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