481results about How to "Improve maintenance convenience" patented technology

The invention discloses a multi-parameter identification based secondary system fault diagnosing method for an intelligent substation. The multi-parameter identification based secondary system fault diagnosing method is mainly applicable to digital substation accordant with IEC61850 communication protocol. The method includes: comprehensively analyzing multi-dimensional parameters including various alarm information, telemeasuring data, telecommand states and the like of a process layer, a spacer layer, a station control layer through a network message recording and analyzing device, monitoring states of secondary devices in real time by utilizing original messages as analysis data and utilizing recording of transient state of device exception and long-term monitoring of operation states as means, and realizing fault diagnosis and state monitoring of the secondary system of the intelligent substation. The multi-parameter identification based secondary system fault diagnosing method for the intelligent substation has the advantages in two aspects including that normal states of the secondary device of the intelligent substation can be monitored, background data and maintenance reference are provided for state maintenance; exception states are identified, quick fault diagnosis is realized, effective instruction can be provided for transport maintenance, and convenience in maintenance of the substation is improved.

The invention provides an automatic voltage control system of a power plant substation, which comprises a plurality of lower computers, a master upper computer, a standby upper computer, a background computer, a movable communication unit, a power plant decentralized control system (DCS), a plant unit automatic voltage regulator (AVR), a controller area network (CAN), a network communication channel and a power data network, wherein the upper computer and the lower computer intercommunicate in the controller area network (CAN); the upper computer and the background computer communicate through the network communication channel; and the upper computer and the master station communicate in the power data network. The scheme of the invention fully considers the actual field situation of the power plant and has the characteristic of strong applicability.

A server device includes a server rack and at least one server unit having a first sliding tray, a second sliding tray, a storage array module and a motherboard module. The server rack includes a first opening and a second opening which are opposite with each other. The first sliding tray is slidably disposed in the server rack. The second sliding tray is slidably disposed in the first sliding tray. The storage array module is disposed on the second sliding tray. The motherboard module is disposed on the first sliding tray and electrically connected to the storage array module.

The invention discloses a data modeling method for a network message recording analysis device. The data modeling method is mainly suitable for an intelligent substation which conforms with a standard DL/T 860, takes original message as analysis basis, and uses substation configuration description files as basis; according to the method, spacer layer equipment and substation control layer equipment of the intelligent substation are automatically associated with each other, status information of process layer equipment associated with the spacer layer equipment is judged and analyzed according to a sampled value (SV) message and a generic object oriented substation event (GOOSE) message which are collected by the spacer layer equipment, the key information of analysis and judgment is added into an equipment model file, and data information of a process layer and a spacer layer is sent to the substation control layer equipment in a way of multimedia messaging service (MMS) messages. The data modeling method can achieve the following effects: a great deal of data information of the process layer and the spacer layer can be provided for a background monitoring system in the intelligent substation, so that the efficiency of fault diagnosis is improved, effective guidance is provided for maintainers, and the maintenance convenience of the intelligent substation is improved.

The invention discloses a state monitoring and tendency estimation device for secondary equipment of an intelligent substation. The state monitoring and tendency estimation device comprises a data acquisition access unit, a data comparison analysis unit and a comprehensive estimation output unit, and is characterized in that the data acquisition access unit receives operation state data of all sets of secondary equipment through various quick report mechanisms; the data comparison analysis unit receives various report data transmitted by the data acquisition access unit, decodes the report data, carries out associated comparison analysis according to a preset substation configuration file and outputs an analysis result; the compressive estimation output unit carries out intelligent estimation according to the analysis result of the data comparison analysis unit and provides estimation results of a secondary system and the secondary equipment. According to the state monitoring and tendency estimation device, normal state monitoring and counting on the secondary equipment of the intelligent substation can be realized, and a large quantity of abnormal signals can be judged, so that quick fault diagnosis can be realized, an effective instruction can be provided for shipment inspection staff, and the convenience in maintenance of the intelligent substation is improved.

A client is used in an environment in which a printing method for causing a device to print printing data via a print server coexists with a printing method for transmitting print data to the device without the intervention of the print server for printout. If it is determined that a printer driver to be set up on the local printer is a newer version than that of a printer driver for a network printer and is shared therewith, a printer driver to be set up on the local printer is set up, and setting processing regarding a printer driver on the print server so as to cause the network printer to operate normally is performed.

In order to solve the problem that since an existing electric leakage sensor cannot detect fault of itself, the electric leakage sensor may fail or gives a false alarm, the invention provides an electric leakage sensor, a high-voltage distribution box and an electric vehicle. The electric leakage sensor comprises a voltage sampling circuit, a communication module, an excitation power supply, a current-limiting resistor, a self-check switch, a threshold resistor and a detection resistor, wherein the excitation power supply, the current-limiting resistor, the self-detection switch, the threshold resistor and the detection resistor are connected in series in sequence to form a loop. An electric leakage detection input end is arranged between the current-limiting resistor and the self-detection switch; an earth terminal is arranged between the threshold resistor and the detection resistor; the voltage sampling circuit detects voltage of the excitation power supply, the detection resistor and the electric leakage detection input end respectively; the excitation power supply comprises a positive excitation power supply and a negative excitation power supply, which are connected in parallel, wherein the positive excitation power supply is connected with a positive excitation switch, and the negative excitation power supply is connected with a negative excitation switch; and the communication module is connected with the voltage sampling circuit, the self-detection switch, the positive excitation switch, the negative excitation switch and a battery manager.

A server rack includes a rack body and fan modules. The rack body has front and back surfaces. Server units are disposed in the rack body. The fan modules are arranged on the back side along a vertical direction. Each fan module corresponds to several server units and includes a fan case and fan units. The fan case assembled to the back side is independently electrically connected to the rack body and suitable for being independently detached from the rack body. The fan units are detachably assembled to the fan case and arranged on the fan case along a horizontal direction. Each fan unit is independently electrically connected to the fan case and suitable for being independently detached from the fan case along a first direction perpendicular to the back surface or independently assembled to the fan case along a second direction opposite to the first direction.

The invention relates to an electronic control system for a new energy vehicle air conditioner microcontroller. The system structurally comprises an operation panel, a microcontroller control unit, a compressor driving motor controller, various temperature and humidity sensors, a harmful gas detection sensor, a fresh air switching controller, a temperature and humidity adjusting collective controller, a harmful gas detector and alarm, an air anion generator and a bactericidal adjustor. By using the system, the property of the new energy vehicle air conditioner is comprehensively promoted. A control method is reasonable, the operation is simple and easy, the refrigerating effect is obvious, the riding comfortableness is promoted, and a control device is simple in structure and is conveniently manufactured. The system can be widely applied to vehicle air conditioner micro-control systems.

The invention provides a high-reliability wind and light complementary communication power supply system in a full redundancy form in order to overcome the defects of high fault rate and poor maintaining convenience for the existing wind and light complementary system. Aiming at the power supply part, a novel rectification load discharger is designed; the reliability of the power supply part is improved by adopting a wind and light general power supply module; the communication reliability is ensured by adopting a CAN (controller area network) and a 485 two-stage ring bus; the reliability of the control part is ensured by adopting a mutual monitoring and controlling mode of a central processing unit and a GPRS (general packet radio service) monitoring and controlling communication module, thus all the power supply part, the communication part and the control part in the system have redundancy characteristics. The system not only can detect the fault in real time, but also can process effectively according to the existent fault; each individual part in the power supply system of electric equipment can not influence the operation of the whole system because of invalid fault, the system recombines and controls again according to the grade of the fault, or the origional performances are kept maximally at the cost of the corresponding performance loss, and when the fault reaches certain limit, external alarming is carried out to inform proffesional staff of overhaul.

The present invention relates to an optical scanning device in which a light beam is incident twice on a deflective reflecting facet and its object is to reduce curvature in scanning line trail or make the curvature substantially zero, or correct scanning line displacement due to the curvature in scanning line trail. Two stationary plane mirrors (13, 14) are disposed to face a deflective reflecting facet (11) which can be rotated about its rotational axis (12) such that a light beam (a1) being incident on and reflected from the deflective reflecting facet (11) is reflected by the two stationary plane mirrors (13, 14) sequentially. The reflected light beam (a3) is incident on and reflected by the deflective reflecting facet (11) again. Assuming that a plane being parallel to the rotational axis (12) and including the light beam (a0) which is first incident on the deflective reflecting facet is an incident plane, the central ray of an emergent light beam (a4) when the emergent light beam (a4) after the second reflection by the deflective reflecting facet (11) is on the incident plane and a straight line as the central ray of a light beam being projected on the incident plane when the deflective reflecting facet (11) is revolved by the maximum rotational angle are set substantially parallel to each other.

The invention relates to an APP interface adaptation method and device capable of dynamic assembly services. The APP interface adaptation method comprises the steps of using a process engine to conduct interface adaption between a front-end APP interface and a back-end service interface. The development of the mobile end APP front-end APP interface is very simple, all operations are online, development speed and maintenance convenience are high, system development efficiency is greatly increased, and the development cycle is shortened. Furthermore, the problems that if business requirements are changed when the program code is written, new functions need to be added or the existing functions need to be modified, source codes of an interface service gateway need to be modified, recompiled,packaged and deployed, which results in large workloads, high costs, long cycle and the like are solved.

The invention discloses a water-cooling resistance device for a frequency conversion system. The water-cooling resistance device comprises a box, wherein more than one hollow pipe is arranged in the box, one end of the hollow pipe is closed, the other end of the hollow pipe is opened and is hermetically arranged on the inner wall of the box so that an internal cavity of the hollow pipe is isolated from an internal cavity of the box, a hole is formed in the box and is communicated with the internal cavity of the hollow pipe, a resistance assembly is arranged in the hollow pipe and is sealed at the opening by a sealing layer, an insulation heat conduction layer is filled between the inner wall of the hollow pipe and the resistance assembly, and a water inlet hole and a water outlet hole are formed in the box and are communicated with the internal cavity of the box. The water-cooling resistance device for the frequency conversion system has the advantages of simplicity in structure, small size, high cooling effect and the like, and is convenient to maintain.

The invention provides a traction inverting power module. The traction inverting power module comprises a substrate, and a plurality of insulated gate bipolar transistors and driving protective plates are fixedly arranged on one side of substrate. The traction inverting power module further comprises a flat composite busbar. The traction inverting power module can also comprise a buffer capacitor and a discharge resister. The insulated gate bipolar transistors, the buffer capacitor and the discharge resister are connected with a main circuit through the busbar. According to the traction inverting power module, the flat composite busbar is integrated on the module, so that parasitic inductance in a circuit is reduced, the structure is simplified, and maintenance convenience of the traction inverting power module is improved, and the reliability of the circuit is improved at the same time.

The invention discloses an eight-processor system and a server and relates to the field of computer communication. The eight-processor system comprises an interconnector arranged on the same with a backboard of a server system, wiring length between a CPU (central processing unit) and the interconnector and between the CPU and the server system in the eight-processor system is shortened. The eight-processor system has good system maintainability. The eight-processor system further comprises an outer frame, the body of the outer frame is of hollow structure, one side of the outer frame, distant from the backboard of the server system, is provided with an opening, the interconnector is mounted on the lateral side, facing the backboard of the server system, of the outer frame, the lateral side, facing the backboard of the server system, of the outer frame is provided with a first opening window and a second opening window. A first processor mainboard and a second processor mainboard are respectively fixedly connected with the interconnector via the first opening window and the second opening window and are respectively fixedly connected with the backboard of the server system.

The invention relates to a two-way V-shaped thrust lever upper bracket. The two-way V-shaped thrust lever upper bracket comprises a longitudinal beam connecting plate, a cross beam connecting plate and two support seats, wherein the middle of the longitudinal beam connecting plate is vertically connected to the bottom of the cross beam connecting plate, the two support seats are respectively arranged between the positive and negative side surfaces of the middle of the cross beam connecting plate and the longitudinal beam connecting plate, the two support seats are in plane symmetry according to the cross beam connecting plate, longitudinal beam bolt holes are formed in the upper and lower sides of the connecting positions of the longitudinal beam connecting plate and the support seats, and cross beam bolt holes and pin holes are formed in the upper and lower sides of the connecting positions of the cross beam connecting plate and the support seats. The upper bracket is combined with U-shaped grooves formed in both ends of a frame cross beam, so as to form a bracket beam assembly. By adopting the design, a thrust lever can be installed in two directions, the quantity of components and parts is reduced, the precision of the installation position is higher, the installation and removal are convenient, the assembly efficiency is higher, and the maintenance convenience is good.

A container-type data center is provided in embodiments of the present invention, including a container, cabinets, computing devices, and cooling devices. The cabinets are arranged in rows inside the container. The computing devices are set inside the cabinets. Air enters from one side of each of the cabinets and exhausts from another side to form left-to-right air vents. The left-to-right air vents are connected in series. In the series air vents of the cabinets, multiple cooling devices are set. In the container, a maintenance passage is formed for maintaining the cabinets. Maintenance planes of the cabinets face the maintenance passage. In the embodiments of the present invention, the air enters from one side of each of the cabinets and exhausts from the other side to form the left-to-right air vents, and the maintenance planes of the cabinets face the maintenance passage. In this way, the maintenance convenience is greatly improved.

The embodiment of the invention discloses a limp control system and a limp control method for an electric automobile and the electric automobile. The limp control system comprises a power supply and a control power supply, a voltage monitor, a standby controller and a contactor, wherein the voltage monitor is used for monitoring the voltage of the power supply and the voltage of the control power supply; the standby controller is respectively connected with the voltage monitor and the control power supply and used for sending out a contactor connection signal when a CAN of a vehicle control unit is lost of signal, and the voltages of the power supply and the control power supply are normal; the contactor is distributed between the power supply and a motor controller and used for connecting a power transmission circuit from the power supply to the motor controller based on the contactor connection signal. After the implementation method of the invention is applied, when the CAN communication of a vehicle is invalid, simple control is still performed on the motor controller, the electric automobile can be driven to a safe place for maintenance, so that the convenience in maintenance of the electric automobile is improved.

The invention discloses a hardware safety chain control method in an upgrade process of a control system of a wind generating set, relates to a wind power generation technology, and aims at providing a control method allowing that a hardware safety chain cannot generate safety chain movement in the upgrade process of the control system. The method comprises the steps that Step 1, an upgrade module outputs an upgrade handshake signal to a hardware safety chain control module after receiving an upgrade instruction; Step 2, the hardware safety chain control module outputs an answering signal to the upgrade module after receiving the upgrade handshake signal, and enters an upgrade mode simultaneously; Step 3, the upgrade module begins to receive an upgrade program after receiving the answering signal, and outputs an upgrade completion signal to the hardware safety chain control module after the upgrade is completed; and Step 4, the hardware safety chain control module returns to a normal mode after receiving the upgrade completion signal.

The invention provides a modularized three-phase instrument calibrating device for a smart grid. The modularized three-phase instrument calibrating device comprises an input interface and an output interface, the input interface is connected with a signal conditioning module, the signal conditioning module is connected with a data analysis and processing module, the data analysis and processing module is connected with a man-machine conversation module, the man-machine conversation module is respectively connected with a voltage and current waveform control module and a three-phase angle sampling module, the output interface is respectively connected with the voltage and current waveform control module and the three-phase angle sampling module, a three-phase waveform generation module is connected between the voltage and current waveform control module and the three-phase angle sampling module and connected with a power amplifier output transformer module, and the power amplifier output transformer module is connected with the output interface. The modules are connected by the aid of a certain communication pattern, and maintenance convenience and use diversity of a system can be improved.