199results about How to "Stable, safe and reliable operation" patented technology

The invention relates to a communication line inspection method which comprises the following steps: inspection task is generated by the inspection platform, an inspection task is downloaded to an inspection terminal; on-site data on a inspection site is collected according to inspection task by the inspection terminal, and uploaded to the inspection platform, the on-site data on the inspection site and the inspection site are associated by the inspection platform, and a query function is provided; real time position information of the inspection terminal can be obtained by the inspection platform through a GPS platform, positional information in each time can be recorded, the positional information of the inspection terminal in each time can be displayed on the electronic map provided by the GIS platform according to a inspection work locus mode. The invention also relates to the communication line inspection platform and a system. The inspection task are arranged for the inspection terminal through the inspection platform, real time position and the inspection work locus of the inspection terminal can be obtained through external GPS platform and the GIS platform and displayed on the electronic map for visual and accurate inspection condition.

The invention discloses an intelligent on-vehicle mobile type phase-change heat storage and supply system. The system comprises a tractor and a phase-change heat storage and exchange device, wherein the phase-change heat storage and exchange device is fixedly arranged on the tractor, and comprises a box body; a box body water temperature gauge and a phase-change heat storage material temperature gauge are arranged on the back wall of the box body; a heating pipe group, a cold water inlet pipe, a phase-change heat storage component and a hot water outlet pipe are arranged in the box body in turn from bottom to top; and a bottom water outlet of the box body and the hot water outlet pipe on the upper part of the box body are connected to a same water main through pipelines. The intelligent on-vehicle mobile type phase-change heat storage and supply system provides hot water supply and heating services for heat energy users by using residual heat or waste heat discharged in the form of steam by high energy consumption units such as heat power plants, iron and steel works and the like, and has the characteristics of simple and compact integral structure, high space utilization ratio, high energy storage density, high heat exchange efficiency, intelligent control, stable, safe and reliable operation, convenience for maintenance and operation management and the like.

The present invention discloses a method of optimizing the static safe and stable operation limit of an electric power system. The method comprises the steps of using a BPA electric power system calculating and analyzing software to analyze an original data report containing the network structure and operation data of an evaluated electric power system; then carrying out the BPA power flow calculation on the data in the original data report; if the BPA power flow calculation is not convergent, correcting a control variable or a constrained condition until the BPA load flow calculation is convergent; then carrying out the N-1 power flow calculation; if the N-1 power flow calculation is not convergent, carrying out the N-1 optimal power flow calculation until the N-1 optimal power flow calculation is convergent, and outputting an N-1 power flow calculation report; and then using the data in the N-1 power flow calculation report to substitute for the data in the original data report, so that the situation that the evaluated electric power system is located in a power grid operation manner of the static safe and stable operation limit is guaranteed.

The invention discloses a multi-power accessed substation anti-islanding system which comprises a photovoltaic substation, a power grid and a grid-connected switch. The grid-connected switch is connected between the photovoltaic substation and the power grid. The system provided by the invention also comprises an anti-islanding monitoring device which is respectively connected with the photovoltaic substation, the grid-connected switch and the power grid. The anti-islanding monitoring device comprises an optical-fiber current differential protection module, a directional over-current protection module and a safety automatic switchover module. The optical-fiber current differential protection module is connected with the power grid. The directional over-current protection module is connected in series between an output line of the photovoltaic substation and an incoming line of the power grid. The safety automatic switchover module is connected with the grid-connected switch. When a line fault, a main transformer fault or a busbar fault happens to the system, the system can rapidly and accurately cuts off small grid-connected power sources by judging switch position. Thus, isolated island operation, damage to user electrical equipment and unstable operation of the system are avoided; user power supply is maintained better; and user loss is reduced.

The invention relates to a sensor for direct current fault line selection and alternating current interlarding line selection. The sensor comprises at least one magnetic core or iron core for sensing a direct current or an alternating current, and a sensing signal of the magnetic core or iron core passes through a current signal conditioning unit and a micro-processing unit to be transmitted to an external interface circuit. The sensor can detect a fault branch circuit in time, provide basis for troubleshooting for overhaul personnel, enable a user to conveniently process failures as soon as possible and provide a powerful guarantee for safe, reliable and stable operation of a direct current power system.

The invention relates to a multifunctional wheelchair for handicapped persons, which consists of a vehicle frame, a chair, a vehicle wheel group, a wheelchair motor group and a power supply, wherein the chair is arranged on the vehicle frame; the lower part of the vehicle frame is provided with the vehicle wheel group; the machine frame is provided with the wheelchair motor group and the power supply for driving the vehicle wheel group. The vehicle frame consists of a horizontal base and a guide rail bracket which is vertically and fixedly arranged on the base; the front side of the guide rail bracket is provided with a suspension arm bracket which is driven to lift by a first linear motor fixedly arranged on the base and operates under the guidance of the guide rail bracket; a chair frame body is suspended under the suspension arm bracket through a rotating shaft; and the lower part of the chair frame body is provided with a turnover seat plate. The wheelchair of the invention is developed completely according to human body biomechanic properties and ergonomic theories and scientifically designed through finite element simulation analysis, is novel in structure, stable in operation, safe and reliable, simple in operation, convenient in use, overall in function and wide in application rage, can effectively the quality of life of the handicapped persons and is a highly creative and humane multifunctional wheelchair for the handicapped persons.

The invention discloses a real-time gathered database system setting method of fossil-fired power plant based on Sync BASE setting method, which is characterized by the following: transmitting the real-time or historic data of control system into universal database format; compressing the data; storing the gathered data, time interval and precision of control system at basic pattern; storing the real-time data and historic data through special file; adapting the driving program of control system to store the gathered data in the universal communication Sync BASE through multiple interface connecting the control system. The invention integrates data gathering, data compressing and product dynamic scanning function into entire real-time database system, which satisfies the need of data gathering speed and memory capacity.

The invention discloses a synchronous inverter control system suitable for a working condition of unbalanced power supply, comprising a power source, a three-phase inverter main circuit, an LC filter circuit and a power grid which are connected in sequence, and also comprising a current acquisition module, a voltage acquisition module, a voltage signal processing module, a power calculation module, a voltage reference signal amplitude calculation module, a voltage reference signal phase calculation module, a voltage reference signal generation module, a current loop reference signal generation module, a positive sequence modulating signal generation module and a modulation module. The synchronous inverter control system can realize the working of a synchronous inverter based on virtual synchronous machine control as core in the working condition of unbalanced power supply.

The invention discloses a secondary energy management platform for an energy center and belongs to the technical field of a secondary energy management technology. The secondary energy management platform comprises a dynamic web interface generation module, a WEB-UI base module, a backstage management module, a general right management module, a data interface module, and a pre-development energy management business module. The dynamic web interface generation module and the WEB-UI base module belong to a front stage, are used for displaying the structure, functions, data of pages and receiving data input by users, and provide the users with an interactive operation interface. The general right management module, the backstage management module, the data interface module, and the pre-development energy management business module belong to a back stage and are used for storing and reading the data. Data access can access a database system, binary files, text documents or XML files. The front stage modules and the back stage modules are communicated through AJAX. The AJAX processes information input by the users, sends the information to the back stage for storage, or reads the data through calling functions in the back stage. The secondary energy management platform has the advantages of being safe, stable, economic, balanced, high in quality, environment-friendly, and capable of raising labor productivity.

The invention belongs to the technical field of applications of analysis methods of power grid dispatching decisions. The system utilizes hardware environments, support platform software and data platform software of a power grid dispatching decision support system, wherein a hardware part can be divided into a computer network, a data acquisition part, a real-time monitoring and control part, a historical data storage part, a static safety analysis part, a network safety device, dispatcher workstations, a maintenance workstation and the like; and the software of the system adopts a WINDOWS system, simulation analysis software power system analysis software package (PSASP) and an advanced support platform. Real-time data acquired by a computer and data acquisition module are transferred to the real time monitoring and control module to perform various treatment and conversion by communicating with a communication server; correlated data and parameters are stored into a historical data storage module, finally, a machine operating power grid advanced application software serve as a terminal workstation and a client, an optional scheme is provided for operation personnel and dispatchers through a man-machine dialogue window, potential unstable factors in the power grid are studied in advance and out-of-limit conditions of the system are eliminated.

The invention relates to a communication protocol system which is applicable to battery parameter remote monitoring of a pure electric vehicle and comprises a complete set of communication protocols which includes 13 protocol modules in total. The protocol system defines encoding methods and frame formats of the voltage and extreme values of a single battery and temperature parameters of a battery chamber for carrying out wireless transmission between a vehicle and a monitoring center; the monitoring center can automatically identify whether the sorts of the received battery parameters and parameter data are accurate or not and also can remotely correct the communication parameters of the vehicle, thereby achieving the goal of remotely monitoring the battery parameters of the pure electric vehicle in the monitoring center; in addition, both the vehicle and the monitoring center can automatically detect whether a wireless communication link between the vehicle and the monitoring center is connected normally or not, namely, the vehicle and the monitoring center can detect the disconnection of the communication link when the communication link is off for week communication signals and the like. Since the communication protocol system has complete protocol stack, the wireless data exchange between the monitoring center and the pore electric vehicle can be carried out timely, stably, and reliably.

The invention discloses relay protection device and system, realizing plug-and-play, of a transformer station. The protection device comprises a line protector, a transformer protector, a bus connection protector and a bus separation protector relying on one another and associated with one another; required current and switching amount information are connected to the line protector, the transformer protector and the bus connection protector directly via secondary cables; opening/closing control is output directly via the secondary cables, and the protectors directly act on a switching mechanism of a bay level; the bus voltage collected by a voltage transformer is connected to the bus separator protector in the analog form; and the bus separator protector is directly connected to the line protector, the transformer protector and the bus connection protector via two optical cables in a point-to-point manner. On the premise that faults of the electric network can be overcome rapidly, the relay protection device system of the invention can further reduce the operation risk of the electrical network as well as the labor intensity of maintenance staff, and it is ensured that the electrical network operates safely, reliably and stably.

The invention discloses a gasbag-type multifunctional wood board splicing machine, comprising a rack (1) and a rotating working table (2); a projecting shaft and a bearing (14) at the two ends of the rotating working table (2) support on the rack (1). The splicing machine is characterized in that the rack (1) is provided with a pneumatic control station (10); one end of the pneumatic control station (10) is connected with an air inlet interface processing unit; the other end thereof controls a pneumatic indexing rotating mechanism (13) to rotate and controls the synchronous grading brake of a pneumatic brake device (12) through a corresponding pneumatic control button, and is connected with a gas circuit rotary joint simultaneously; the side wall board of the rotating working table (2) is provided with a pneumatic working valve station (15); one end of the gas circuit is connected with a side compressed air cylinder (8) and a gasbag-type positive compressed mechanism (9) to finish a series of actions of clamping, compressing, loosening and releasing to workpieces, the other end of the gas path is connected with the gas circuit rotary joint (11) through an air pipe, so that the compressed air is added to a system to complete multifunctional splicing of the wood board. The splicing machine features high efficiency, high quality and no electricity consumption, and is used for splicing surface boards, thin boards and workpieces in special shapes.

The invention discloses a multifunctional energy-saving type continuous wastewater evaporative crystallization process. The process includes the step A of first-stage preheating of wastewater, the step B of second-stage preheating of wastewater, the step C of triple-effect heating of wastewater, the step D of triple-effect separation of wastewater, the step E of vapor condensation, the step F of forced circulation and two-effect heating of wastewater, the step G of two-effect separation of wastewater, the step H of cyclic utilization of two-effect vapor, the step I of forced circulation and one-effect heating of wastewater, the step J of one-effect separation of wastewater, the step K of cyclic utilization of one-effect vapor, the step L of recovery of vapor condensate, the step M of discharged of non-condensable gas, the step N of forced circulation and crystallization of wastewater, the step O of centrifugal separation and the step P of sewage discharge and secondary circulation of wastewater. Corresponding adjustment can be conduced according to the properties and boiling points of wastewater, conditions required by users, concentration changes of material crystallization and the like, and therefore optimization of the effective number and the minimization of the heat exchange area are achieved, and the evaporation intensity is improved to the maximum.

The invention discloses a microfiltration membrane oil filed sewage processing device. The device comprises a flocculation settlement facility, a cyclone oil-water separator, a multistage mechanical filtering device, and a metal membrane filtering device, which are connected in sequence. The multistage mechanical filtering device comprises a walnut shell filtering device, a fine walnut shell filtering device, a modified fiber ball filtering device, and a dual-layer filtering material filtering device, which are connected in sequence. The sewage processing method comprises the following steps: removing pollutants by the flocculation settlement facility, pumping sewage into the cyclone oil-water separator to carry out separation, and filtering the separated water phase by the walnut shell filtering device, the fine walnut shell filtering device, the modified fiber ball filtering device, the dual-layer filtering material filtering device, and the metal membrane filter device to obtain qualified water phase. The design is novel, the operation is safe, stable, and reliable, the effect is good; the produced water in oil field can be purified and the processed water can reach the standards of reinjection. The provided device can realize gas-water combined backwashing, the backwashing effect is guaranteed, and the device can be used for a long term.

The invention discloses a photovoltaic virtual synchronous control method based on power tracing. The method comprises the following steps: adopting a power superposition equation to obtain a power command, obtaining a direct current side reference voltage according to a power tracing method based on polynomial fitting, and after obtaining photovoltaic panel reference power through a voltage loop,obtaining a d-axis active power command through a power outer loop; obtaining a reactive power command through a once voltage regulation equation, and then obtaining a current dq-axis command to carry out current closed loop control. Flexible control for active power is reached by controlling the size and direction of the direct current side reference voltage, and the reactive power is adjusted through the once voltage regulation equation. The step length magnitude of the direct current side reference voltage is obtained through a polynomial fitting method, and the direction is obtained through a power tracing method. Energy storage equipment does not need to be added to an inverter, the frequency and voltage of a power grid can be adjusted, and the stability of the system and preferableregulation effect for frequency voltage can be guaranteed.

The invention relates to a constant temperature control device, in particular to a temperature control device for an electrolyte storage device of a vanadium redox battery. The electrolyte storage device is controlled at constant temperature by using a cyclic temperature control method, the optimum working temperature of the whole system is effectively ensured, radiating area is large, the occupation area of an energy storage system is saved by using an internal space of a liquid storage tank, and the system can operate safely, stably and reliably. The temperature control device is novel in design and reasonable in structure, the working temperature of a control system can be controlled in real time, the constancy of temperature is maintained, and the system can operate safely and reliably. The temperature control device can be conveniently integrated in the energy storage system of the vanadium redox battery, large-scale engineering application of the energy storage system is realized, and the stability of the system is effectively improved.

The invention relates to a method for industrially preparing high-purity carbon monoxide through formic acid dehydration. The method includes the steps that (1) formic acid is dehydrated into carbon monoxide under the concentrated sulfuric acid co-heating condition; (2) the generated carbon monoxide is purified to obtain the carbon monoxide with the purity being 99.999%; (3) dilute sulfuric acid generated by dehydration reaction is subjected to vacuum concentration, so that the dilute sulfuric acid continues participating in the reaction and being recycled, and acidic waste water generated in the reaction serves as a cooling medium and continues being recycled after being neutralized. The method achieves continuous feeding, continuous discharging, vacuum concentration of the dilute sulfuric acid and recycling of the sulfuric acid and the waste water. An advanced PLC control system is arranged, and production can be converted into industrial continuous production. Investment intensity is low, production cost is low, operation is safe, stable and reliable, and the technology saves energy and is environmentally friendly.

The invention discloses a full automatic hydraulic pressure around rotary trigger; wherein, an around rotary table (2) is propped on a frame (1) through axle shafts and a bearing (17) at both ends, and is match-connected with a turbine reducer (14). The invention is characterized in that: a touch panel (11) is arranged on the frame (1) and is connected with a programmable controller in an electrical cabinet (25) through a data line; the electrical cabinet (25) is connected with motors (13, 12) and low voltage power supply signals and data signals are transmitted to the around rotary table (2) by the electrical cabinet (25) through a rotary electric appliance (16); a button station (9), a four-channel intelligent measurement and displaying unit (10) and a programmable controller distributor electric control box (19) are arranged on the around rotary table (2) for controlling all actions of the worktable; the cylinders (3, 5, 7) are connected with one end of a solenoid directional control valve unit (8), and a hydraulic pressure rotary joint (15) for connecting the high-pressure oil of the motor (12, 13) into the system is connected with the other end; the random monitoring feedback signals from photo electricity, position and pressure sensors are intelligently controlled by the programmable controller. The invention has the advantages of high performance, high efficiency and high quality.