42results about How to "Less communication data" patented technology

The invention discloses an active distribution network (ADN) voltage real-time fuzzy control method. The method comprises steps: according to the maximum and minimum values of feeder voltage uploaded by each feeder, the maximum voltage and the minimum voltage of the distribution system are put forward, if certain feeder voltage exceeds a threshold, a reactive power fuzzy controller FQC for DG (distributed generation) is started, and reactive power is injected or absorbed through the DG; and if the reactive power fuzzy controller FQC for the DG can not restore the voltage to a normal level and deltaVsys</=deltaVmax-deltaalpha, a transformer on-load tap changer fuzzy controller FOC is started, the transformer on-load tap changer OLTC completes a voltage regulating task, or otherwise, an FPC is started, and the deltaVsys is reduced, wherein the deltaalpha is an adjusting value of the tap changer. The main control unit of the invention has a simple control algorithm, the needed communication data are few, the calculation amount is small, the decision-making time is short, problems of over voltage and low voltage caused due to mutual action between the OLTC and the DG can be lessened, and the consumptive ability towards the DG by the ADN can be improved.

The invention discloses a virtual power plant flexibility polymerization method based on a biggest embedded cube. The method includes: collecting house heating information heat parameters by a polymerization controller, and building a model according to the parameters; collecting prediction power parameters and energy storage parameters of a distributed photovoltaic power source at the same time through the polymerization controller in the step 1, and building a model according to the parameters; adopting a biggest embedded cube method for the house heating information heat parameters and prediction power parameter and energy storage parameter data of the distributed photovoltaic power source acquired in the step 1 and the step 2 to form polymerization power constraint space, and resolvingthe biggest embedded cube of the polymerization power constraint space to acquire a virtual power plant model after scheduling flexibility polymerization. The virtual power plant model is acquired byoperation inside after all parameters including the house heating information heat parameters, the parameters of the distributed photovoltaic power source and parameters of an energy storage batteryare collected by the polymerization controller under constraint of the embedded cube, and only the virtual power plant model after polymerization needs to be uploaded to a power distribution network scheduling center, so that communication data size is reduced greatly.

The invention discloses a parking lot stall management system. The parking lot stall management system is characterized in that the system comprises a master control module, repeater modules and terminal devices. The master control module is connected with a plurality of repeater modules, and each repeater module is connected with a plurality of terminal devices. The terminal devices are placed at corresponding parking spaces of a parking lot and are used for monitoring the states of the corresponding parking spaces of the parking lot and for sending the states and the self address information of the corresponding parking spaces to the repeater modules. Timing polling is conducted on the state information of all the terminal devices connected with the repeater modules by the repeater modules, and the latest state information is stored to be inquired by the master control module. Timing polling is conducted on all the repeater modules by the master control module, and the latest state information of the repeater modules themselves and the latest state information of sub nodes of the repeater modules are required to be submitted. By the adoption of the method, the problems that the states of the parking spaces of the parking lot can not be obtained in real time at present, and effective management is lacking are solved.

The invention discloses a double-end direct-current power distribution network distributed region protection method based on a current differential state quantity. Firstly, a medium-voltage direct-current bus is used as a boundary to carry out region division on a medium-voltage direct-current line; direct-current voltage and current amplitudes are used as fault characteristic quantities of protection starting, state word definition is carried out on a fault current differential quantity, fault type judgment and region fault positioning are carried out by utilizing the distribution condition of fault current state words, and direct-current circuit breakers at the two ends of a fault region are rapidly disconnected. Only information communication of adjacent sensors is needed, communicationdata are few, the transmission distance is short, faults can be rapidly removed when single-pole short circuit and double-pole short circuit happen to a direct-current line, the applicability is high, and the method can be used for a double-end or multi-end direct-current power distribution network in various operation modes.

The invention discloses an energy storage system monitoring method, device and system. The energy storage system monitoring method, device and system can determine the current operation state of an energy storage system; according to a pre-established corresponding relation between the operation state of the energy storage system and a to-be-monitored data item, a target to-be-monitored data itemmatched with the current operation state is determined, wherein the to-be-monitored data item is a part or all of the data items in the operation data of the energy storage system; a data monitoring request is sent to a monitoring module for requesting the monitoring module to collect the data of the target to-be-monitored data item; and the data, collected by the monitoring module, of the targetto-be-monitored data item is received. Due to the fact that the monitoring module does not collect all data items in the operation data of the energy storage system at all moments, and only the targetto-be-monitored data item matched with the current operation state of the energy storage system is collected. Therefore, the data volume acquired by the monitoring module can be reduced, so that thecommunication data volume between the energy storage system and an upper layer controller is reduced, and the transmission resources are saved.

The invention provides a detection device capable of automatically focusing and an automatic focusing method. The detection device comprises a laser emission source, a detection chip, an objective lens, a light intensity detection module, an operation control module and an objective lens height adjusting component, wherein the objective lens is positioned between the laser emission source and thedetection chip and used for focusing parallel beams; the light intensity detection module is arranged opposite to the objective lens so as to receive and detect the light intensity of the parallel light beams after passing through the objective lens and the detection chip; the operation control module is in communication connection with the light intensity detection module and used for receiving asignal detected by the light intensity detection module and performing operation to obtain the light intensity change range; and the objective lens height adjusting component is in control connectionwith the operation control module to obtain the light intensity change range and adjust the relative height between the objective lens and the detection chip according to the light intensity change range so as to enable the parallel light beams to be focused on the detection area plane. The detection device is relatively small in communication data volume, low in requirement on hardware and software of equipment and capable of saving the manufacturing and using cost.

The invention discloses a system for guiding nearby objects in a parking lot. The system is characterized by comprising parking space detectors, parking space displayers and parking space guiding screens. The parking space detectors are arranged on all parking spaces of the parking lot and used for monitoring the states of the corresponding parking spaces inside the parking lot and sending the state information of the corresponding parking spaces and the address information of the parking space detectors to the parking space guiding screens. The parking space displayers are arranged on all parking spaces of the parking lot and used for displaying the parking space information, the nearby object information related to the geographical positions of the parking space displayers and guiding information for guiding a user to one nearby object. The parking space guiding screens are used for regularly polling the state information of the parking space detectors connected with the parking space guiding screens, storing the state information newly sent by the parking space detectors and displaying the parking space information to guide the user to the corresponding parking space. The parking space guiding screens are further used for projecting the information of the nearby objects of the parking space guiding screens to the parking space guiding screens. The purpose of guiding the user who wants to park to enter a vacant parking space can be achieved, and the purpose of finding the objects conveniently can be achieved.

The invention provides computer equipment, a product, a data task processing method and a device thereof. The method comprises the steps: carrying out the cyclic redundancy check of local safety related data and/or input and output data, generating a first check value, and transmitting the first check value to a backup central processing unit; receiving a second check value which is sent by the backup central processing unit and is generated by performing cyclic redundancy check on the local safety related data and/or the input and output data, and comparing the first check value with the second check value. Therefore, the communication data volume is effectively reduced. The comparison efficiency is improved, and the operation efficiency of the CPU is improved under the condition of ensuring the comparison result.

The invention discloses a parking space guiding device with the object guiding function. The parking space guiding device is characterized by comprising control modules, display screens and a storage module, wherein the display screens are connected with the control modules and used for controlling output, geographical location information of the parking space guiding device and objects is stored in the storage module, and the control modules select the information of the objects nearby parking space guiding screens according to the geographical location information of the parking space guiding device and the objects to guide a user to reach the target object. According to the parking space guiding device, the aim that the parking user is guided to park a car into an empty parking space can be achieved, and the locating function based on the geographical location can be further achieved.

The invention discloses a parking space displayer on a parking lot parking space. The parking space displayer comprises a power supply module, a light box sheet and a light source through which the light box sheet can have the lighting function. The parking space displayer is characterized in that the parking space information, the nearby object information related to the geographical information of the parking space displayer on the parking lot parking space and the guiding information for guiding a user to a nearby object are displayed on the light box sheet. The parking space displayer on the parking lot parking space is combined with the object information with the geographical position information, and the user can be guided to find the target object conveniently.

The invention discloses a multi-module parallel control method and system. The multi-module parallel control method comprises the steps that a power supply main module is enabled to be in parallel connection with multiple power supply slave modules by adopting a communication connection mode; the power supply main module carries out sampling on voltage and current parameters of the system and obtains the output power required by a load after calculation, the output power is equally distributed, then the average power should be output by each power supply slave module is broadcast and transmitted to each power supply slave module through a communication bus; and finally, each power supply slave module receives the given power transmitted by the power supply main module and outputs the corresponding power through the control thereof. There is only a power instruction transmitted by the main module to the slave modules in a communication line, and no other interactive information is required, so that the communication speed is high and not affected by the number of parallel modules, and the capacity can be expanded conveniently.

The invention relates to the field of an air conditioner control system, and discloses a distributed air conditioner control system. The distributed air conditioner control system comprises a monitoring computer and a valve hall control module, wherein the valve hall control module comprises a main control building CPU, a repeater, a bus network, a first remote control substation and a second remote control substation. The bus network comprises a first optoelectronic isolation module, a second optoelectronic isolation module, a data sending circuit module and a communication interface module;the first remote control substation comprises a first I/O module, a first control CPU and a first control unit; and the second remote control substation comprises a second I/O module, a second controlCPU and a second control unit. According to the distributed air conditioner control system, a distributed control mode is adopted, so that the problem that all the whole air conditioning system stopsrunning due to faults of the control center or communication faults is avoided; and the RS-485 bus is less in equipment, small in communication data volume, so that slow reaction is not prone to occur.

The invention discloses a refrigerator refrigeration performance measurement and control platform based on computer control. The platform comprises a computer, and a switching value controller, a data acquisition device and an interface converter which are electrically connected with the computer, a field bus electrically connected with the interface converter, and a digital indication adjuster and a touch screen which are electrically connected with the field bus. According to the platform, the switching value controller and the data acquisition device are enabled to individually occupy one RS232 COM serial communication port of the computer, individual communication lines are respectively occupied, timeliness of the switching value controller and the data acquisition device is relatively high, moreover, communication between the switching value controller and the computer belongs to single-machine communication, programming of a communication module of the switching value controller is relatively simple, communication can be realized without the address identification data, the communication data is reduced, and relatively high efficiency is realized.

The invention provides a resource updating method, device and system, which are used for a client. The resource updating method comprises the steps: obtaining initial resource data from a cloud server, and constructing a client target scene according to the initial resource data; obtaining an operation instruction, and processing the initial resource data according to the operation instruction to obtain first processing data, second processing data and client processing result data; sending the first processing data to a cloud server, and sending the second processing data to a server; and under the condition that the processing result data of the client is correct, obtaining final resource data from a cloud server, and updating the target scene of the client based on the final resource data. The data is sent to the server and the cloud server through the client, so that resources can be quickly updated between the client and the server.

The invention belongs to the technical field of power, and discloses a load unloading method and load unloading device of a power system. The load unloading device of the power system comprises a loadinformation detection module, a master control module, a priority calculation module, an unloading module, a load control module, a fault identification module, a cloud service module and a display module. By the load control module, energy of a pulse load in an independent power system can be controlled very well; and meanwhile, the load at each branch end in a power distribution line is monitored by the fault identification module, analogue/digital conversion is performed on a sampling signal, a load digital signal output from the monitoring unit is transmitted to the fault identification unit, the load digital signal is decomposed through wavelet transform by a microprocessor MCU, and the arc fault identification capability of the load end is greatly improved.