47results about How to "Guarantee the security of power supply" patented technology

The invention discloses a power supply seamless switching device and method of an electrified railway traction substation. Four paths of voltages, namely two-phase voltages of buses a and b of a contact network and voltages of a bus I and a bus II of a power supply, and four switching position signals, namely switches 201A and 201B of a low-voltage side of a main transformer 1B and switches 202A and 202B of a low-voltage side of a main transformer 2B are accessed to the switching device. During application, the current running mode of the traction substation is identified according to access quantity, automatic charging is achieved to prepare for switching if the running mode is normal, and discharging is performed to lock a switching function if the running mode is abnormal; three switching modes of parallel automatic switching, parallel semi-automatic switching and series switching can be performed; an optimal switching-on mode can be selected according to a real-time relation between the bus voltages of the power supply and the bus voltages of the contact network during switching on; and six modes of parallel rapid switching, rapid switching, same-phase lead phase angle switching, same-phase lead time switching, residual voltage switching and long delay switching can be performed, and uninterruptible power supply switching of two power supplies of the electrified railway traction substation can be achieved.

The invention provides a distribution room operating state evaluation system and an evaluation method. According to the distribution room operating state evaluation system and the evaluation method provided by the invention, the operating state of a distribution room can be evaluated quickly, accurately and comprehensively through increasing evaluation for influence factors such as the surrounding environment of the distribution room and combining regular inspection and real-time acquisition of warning information on an online monitoring platform, thereby being convenient for discovering a fault of the distribution room timely, and preventing occurrence of a safety accident. In addition, influences imposed on an evaluation result by variation factors of the personnel, the environment and equipment are reduced in the evaluation process, thereby further improving the accuracy of the evaluation result, improving the distribution room operation and maintenance management level and the efficiency, and being conducive to ensuring the power supply safety of the distribution room.

The invention relates to an anti-climbing device for a power iron tower. The anti-climbing device comprises iron sheets, a door, a lock and a ladder, and is characterized in that the iron sheets are used for tightly sealing the four side faces and the bottom face at a certain height of the power iron tower, so that the power iron tower is enabled to be enclosed to form a space not open to the lower part, people are enabled not to climb the power iron tower outside, as the door is arranged on one side face, the lock is arranged on the door, the ladder is arranged in the door, and people can climb to the upper part of a space enclosed by the iron sheets through the ladder so as to continuously climb the power iron tower.

The invention provides a high-efficiency and safe prefabricated substation, comprising: a pre-built substation room, an air vent is provided on the upper side of the pre-built substation room, an arc-shaped rainproof plate is arranged on the upper side of the air vent, and the arc-shaped The rainproof plate is installed on the top of the pre-built substation room through the support plate, a heat dissipation fan is installed in the vent, an inspection door is provided on one side of the pre-built substation room, and a transformer is installed in the pre-built substation room. The transformer is installed on the adjustment base plate, and the adjustment base plate is installed on the ground in the pre-built substation room through the height adjustment rod. The heat dissipation fan includes a fan barrel, and a net cover is installed on one side of the fan barrel. The present invention can effectively prevent rainwater Soaking ensures the safety of power supply. At the same time, it can effectively reduce the indoor temperature of the substation and improve the service life of the equipment. In addition, the installation of equipment in the substation can be adjusted according to different needs, which greatly improves the scope of application.

The invention relates to the technical field of urban rail transit, in particular to a calculation method for load power of urban rail transit. The load power of the rail transit is a sum of total complex power of a traction station, total power of a voltage reduction station, reactive loss of a main substation transformer and charging power of a cable; and a load of the rail transit can be obtained by calculating the total complex power of the traction station, the total power of the voltage reduction station, the reactive loss of the main substation transformer and the charging power of thecable. The invention discloses the calculation method for the load power of the urban rail transit. By calculating the load power of the urban rail transit, the electric energy quality operation levelof the urban rail transit can be comprehensively known, so that the electric energy quality emission and transmission characteristics of the load of the rail transit can be accurately grasped, the power grid access modeling simulation and test assessment technology research on the load of the urban rail transit is carried out, and technical support and quantitative standards are provided for guaranteeing safe power supply and operation of the load of the urban rail transit.

The invention belongs to the technical field of power supplies and provides a multi-voltage supply power source conversion circuit, a vehicle-mounted embedded power source and a power supply system. The power source conversion circuit comprises a first direct-current power source, a direct-current conversion module, a battery management module and a dual-power-source switching module; the direct-current conversion module comprises a direct-current conversion circuit and at least one diode voltage reduction circuit; when the direct-current conversion module performs voltage conversion on a first direct-current voltage to obtain a second direct-current voltage, the diode voltage reduction circuit can perform voltage reduction on the second direct-current voltage and outputs direct-current voltages with different amplitudes; the battery management module generates a third direct-current voltage through charging and discharging; and the dual-power-source switching module generates and outputs a fourth direct-current voltage according to the third direct-current voltage or the voltage output by the diode voltage reduction circuit. With the multi-voltage supply power source conversion circuit, the vehicle-mounted embedded power source and the power supply system of the invention adopted, the problem that a power supply voltage reduction circuit in the prior art cannot compatibly output working voltages with different amplitudes, is relatively low in compatibility, and is relatively high in multi-voltage power supply cost can be solved.

The invention provides a power transmission line multi-energy complementary power supply system and a power supply method thereof. The system comprises a storage battery power supply branch, a CT induction power supply branch, a solar power supply branch and a lightning protection ground wire coupling power supply branch, the storage battery power supply branch, the CT induction power supply branch, the solar power supply branch and the lightning protection ground wire coupling power supply branch are arranged in parallel, each power supply branch is connected with a BMS management system anda power bus, the lightning protection ground wire coupling power supply branch, the solar power supply branch and the CT induction power supply branch are each provided with a power supply state detection unit, the storage battery power supply branch is provided with an electric quantity detection unit and a charging management unit, a voltage detection unit, the power supply state detection unit,the electric quantity detection unit and the charging management unit are all connected with the BMS management system, the BMS management system is connected with a monitoring platform, and the monitoring platform is connected with a monitoring mobile terminal. The power supply of the four power supply branches is coordinately controlled through the BMS management system, and the power utilization safety of power transmission line monitoring equipment is ensured.

The invention provides a running maintenance method for a power distribution network comprising a plurality of photovoltaic microgrids, and belongs to the field of running maintenance of the power distribution network. By the running maintenance method, the problem that security threat can be brought to the power distribution network and a worker by an existing method is solved. The running maintenance method comprises the steps of building a power distribution network model comprising the plurality of photovoltaic microgrids, wherein the power distribution network model comprises a distribution network main trunk, a distribution network branch and a photovoltaic microgrid branch, and the distribution network main trunk, the distribution network branch and the photovoltaic microgrid branchrespectively comprises a plurality of nodes; setting a short-circuit fault at each node of the distribution network main trunk and the distribution network branch of the power distribution network model, recording a voltage effective value of each node at the fault, and judging whether running of the power distribution network model is reliable or not; determining the running maintenance method when the short-circuit fault occurs in the nodes of the distribution network main trunk and the distribution network branch of the power distribution network model if the power distribution network model is not reliable to run; and determining the running maintenance method when the short-circuit fault occurs in the nodes in the distribution network main trunk and the distribution network branch ofa power distribution network side corresponding to the power distribution network model.

The invention relates to a method for measuring horizontal displacement of the top end of a wind power generator tower. a plurality of pairs of parallel infrared receivers are adopted to control a photoelectric switch below the top end of a tower frame of the wind power generator tower, then a laser infrared lamp below the top of the tower frame is started to vertically transmit infrared rays to abuilt-up projector screen at the bottom of the tower frame of the wind power generation tower, a dynamic position diagram of a projection point of the laser infrared lamp on the projector screen is shot by utilizing an infrared induction high-definition camera, then pictures are transmitted to an external PC in real time, the horizontal displacement of the top end of the wind power generator tower is calculated through the distance between the position of the dynamic projection point and the position of a calibration projection point. The method can accurately measure the horizontal displacement of the top end of the wind power generator tower, the working state of the top end of the tower frame of the wind power generator is fed back in real time, the evaluation of the external system onthe safety of the wind power generator tower is improved, and the method is an important monitoring method for guaranteeing the power supply safety of the wind power generator.

The invention relates to a power supply and distribution control circuit for an unmanned submarine power supply. The power supply and distribution control circuit comprises a control module which is connected with peripheral communication equipment and used for generating a main control signal according to the communication signal outputted by the peripheral communication equipment; multiple isolation driving modules which are connected with the control module and used for generating multiple switch driving signals according to the main control signal; and multiple switch control modules whichare correspondingly connected with multiple isolation driving modules in a one-to-one way and used for conduction or disconnection according to the corresponding switch driving signals and outputtinga power supply signal in case of conduction. According to the power supply and distribution control circuit, the isolation driving function for the unmanned ship power supply can be realized throughthe isolation driving modules under the centralized control of the control module so that the safety of the power supply and distribution control circuit can be guaranteed; besides, the automatic andintelligent management and control of the unmanned ship power supply can be realized by the power supply and distribution control circuit, and the power supply signal outputted by the power supply anddistribution control circuit can guarantee the power stability and reliability of the electronic equipment.

The invention discloses a power supply health state dynamic evaluation method and device based on cross-regional integration and fusion, and the method comprises the steps: collecting dynamic monitoring data of power supplies in different areas, and carrying out the fusion processing of the dynamic monitoring data, static basic data and quasi-dynamic data corresponding to the dynamic monitoring data, and forming fusion monitoring data; inputting the fusion monitoring data into information model unification for information format unification processing to obtain unified fusion monitoring data; extracting data influencing the key performance indexes to obtain the data influencing the key performance indexes; performing data mining analysis processing to obtain a mining analysis result; and inputting the mining analysis result into a power supply health state evaluation model for health dynamic state evaluation processing to obtain a power supply health dynamic state evaluation result. According to the embodiment of the invention, dynamic evaluation of health states of different power supplies can be effectively carried out, health problems of the power supplies can be found in time, and power supply safety is guaranteed.

The invention discloses a power supply seamless switching device and method of an electrified railway traction substation. Four paths of voltages, namely two-phase voltages of buses a and b of a contact network and voltages of a bus I and a bus II of a power supply, and four switching position signals, namely switches 201A and 201B of a low-voltage side of a main transformer 1B and switches 202A and 202B of a low-voltage side of a main transformer 2B are accessed to the switching device. During application, the current running mode of the traction substation is identified according to access quantity, automatic charging is achieved to prepare for switching if the running mode is normal, and discharging is performed to lock a switching function if the running mode is abnormal; three switching modes of parallel automatic switching, parallel semi-automatic switching and series switching can be performed; an optimal switching-on mode can be selected according to a real-time relation between the bus voltages of the power supply and the bus voltages of the contact network during switching on; and six modes of parallel rapid switching, rapid switching, same-phase lead phase angle switching, same-phase lead time switching, residual voltage switching and long delay switching can be performed, and uninterruptible power supply switching of two power supplies of the electrified railway traction substation can be achieved.

The invention discloses and provides a three-phase overhead power transmission power theft prevention system, which comprises a metering server, an overhead line power acquisition device and a local receiving device. The overhead line power acquisition device is in radio connection with the metering server and the local receiving device. The metering server is in network connection with the local receiving device for the transmission of data. The metering server can also collect power consumption information of a metering box at a user side. The overhead line power acquisition device includes a GPS Beidou module, a wireless transmission module, a phase-locked loop circuit and a timing sampling circuit. The overhead line power acquisition device transmits the acquired line voltage and current signals to the metering server through wireless signals. The local receiving device calculates the amount of power consumption and transmits to the metering server. The metering server compares and calculates the power consumption information of the metering box at the user side to determine whether power theft exists and generates alarm information to remind relevant personnel to take timely measures.

The invention discloses a composite monitoring and analyzing device and method based on current and temperature of a power line. The method comprises the following steps: step S1, a temperature and current relation model of a cable is analyzed and acquired by using a credible method; S2, a three-phase current and a three-phase wire skin temperature are measured by using each sensor clamped at the monitoring part of the three-phase cable; S3, the sub-sensor transmits current, temperature and cable health state data to the main sensor through the wireless module, and the main sensor calculates a low-voltage outgoing line load rate and a low-voltage outgoing line three-phase unbalance degree; and S4, the main sensor determines a switch load condition and a cable health condition according to the obtained data and a calculation result, sends an alarm signal of a corresponding grade according to a judgment result, and sends the alarm signal to the gateway through the concentrator in a wireless mode.

The invention discloses a photoelectric composite cable and a manufacture method and application thereof. The photoelectric composite cable includes a cable core and a polyester band and an outer sheath wrapping the cable core in sequence. The cable core includes three insulation wire cores whose outer sides are each provided with a metal central pipe type temperature measurement unit and a non-metal central pipe type communication optical unit. Each two of the three insulation wire cores are in contact. Filler is arranged in a gap between the cable core and the polyester band and is providedwith a hole. The metal central pipe type temperature measurement optical unit is arranged in the hole. The manufacture method includes integrating the three insulation wire cores, the three metal central pipe type temperature measurement optical unit and the non-metal central pipe type communication unit into the cable core; filling the gap of the cable core with the filler; wrapping the cable core with the polyester band; and forming the outer sheath through extruding. According to the invention, the photoelectric composite cable integrates functions of temperature measurement, early alarm and communication; monitoring on each insulation wire core can be realized with high precision and the cable structure compactness is improved.

The invention discloses an intelligent power grid power data processing analysis method and device and a storage medium, and the method comprises the steps: carrying out the real-time monitoring of the operation power parameters of all transformers in a target power transmission grid, and analyzing the operation power state indexes of all transformers in the target power transmission grid; the method comprises the following steps: screening a power state operation fault type corresponding to each fault transformer in a target power transmission grid, screening target maintenance personnel corresponding to each fault transformer in the matched target power transmission grid, and after maintenance starting information of the target maintenance personnel corresponding to each fault transformer in the target power transmission grid is received, starting maintenance; and if the fault transformer fails, managing the target maintenance personnel corresponding to each fault transformer, and performing corresponding maintenance treatment measures, thereby realizing efficient and reasonable distribution of maintenance tasks for the maintenance personnel, improving the fault maintenance efficiency and the fault maintenance progress of the power transmission grid transformer to a great extent, and further ensuring safe power supply of the power transmission grid.

The invention relates to a power supply state monitoring system and method, in particular to a substation DC power supply state monitoring system and method, and is intended to solve the problem that system capacity verification test can be carried out to detect an existing substation DC system only after a battery is removed and after the system is used for a certain time, the problem that transporting is inconvenient, the problem that field monitoring by personnel is required, and the problem that great potential safety hazards exist. The system comprises a master controller, a mains supply detection circuit for detecting whether mains supply is lost, a discharge device-battery pack switching control circuit for switching a discharge device and a battery pack according to the loss condition of the mains supply, a battery temperature acquisition circuit for detecting operating temperature of a battery, a charging balance circuit for controlling charging of the battery, and an internal resistance measuring module for detecting internal resistance of the battery. The system and method of the invention are suitable for monitoring substation DC power supply state.

The invention discloses an AC system branch fault monitoring system and method. The system comprises a control CPU, a voltage collection module, a current collection module and a communication module, wherein the voltage collection module collects the bus voltage of an alternating current system, the current collection module collects at least two paths of current, and the communication module transmits a voltage signal acquired by the voltage acquisition module and a current signal acquired by the current acquisition module to the control CPU. The voltage, load current and residual current changes of each power supply line are monitored respectively, the AC system branch fault monitoring system collects voltage signals and current signals of each line, AC feeder branch faults are analyzed according to monitoring data, the lines needing to be monitored are monitored in a targeted mode, the faults are found in time, the cost is saved, the maintenance efficiency of maintenance personnel is improved, and the power supply safety is guaranteed.

The invention discloses a lithium battery system compatible with capacity expansion and used for UPS, and a control method thereof. According to the system, a high-rate lithium iron phosphate battery cell is adopted, and is matched with a three-stage BMS, an integrated cloud management module and an intelligent fire-fighting module. The system has the beneficial effects that the three-stage BMS system is used, the three-stage BMS system is divided into the BMU system, the CBMS system and the GBMS system, various types of UPS and power supply systems can be compatible, the operation state of each module is accurately monitored, and the power supply safety of a user load is guaranteed; and by adopting the intelligent cloud management system, monitoring management of a mobile phone APP or a PC end can be supported through the intelligent cloud management system, so that the application range of the lithium battery system is widened, the use requirements of various industries are met, and the practicability of the lithium battery system is improved.

The invention belongs to the field of electric vehicle charging and replacement, and specifically relates to a mobile charging equipment dispatching method, system, and device based on random locations, aiming to solve the problems of inconvenient charging at charging stations and low utilization rate of charging equipment. The method of the present invention is applied to a charging station system with mobile charging equipment, including a track, a mobile charging device, and a parking detection device; the track includes a first track and a plurality of second tracks, and the first track is set at a parking charging position, and the track switching device Connect with the second track; when the parking detection device is triggered, obtain the parking charging bit code where the electric vehicle to be charged is located and its corresponding target second track position; obtain the track where the mobile charging device in standby state reaches the target second track position Itinerary: connecting the target second track and the first track through the track switching device; selecting the mobile charging device with the shortest track travel to move along the first track to the target second track. The invention improves the utilization rate of the charging equipment.

The invention discloses power distribution cabinet oxidized wire online reduction equipment. The equipment comprises a power distribution cabinet, wherein a power distribution cavity is formed in thepower distribution cabinet, a moving mechanism is arranged in the power distribution cavity, the moving mechanism comprises two fixed bases, and two fixed bases are symmetrically arranged up and down;the power distribution cabinet wire can be subjected to oxidation reduction in a mechanical cooperation mode, the effects of improving operation convenience and protecting personal safety are remarkable, the moving mechanism part is arranged in the power distribution cabinet wire, the detection mechanism and the reduction mechanism can be controlled to move, equipment can conveniently detect andreduce the wire, and the detection mechanism part is simple in structure and convenient to operate; the wire oxidation degree can be detected so as to determine whether reduction is needed or not, themechanism part is restored, the wire oxidation part can be restored, and power supply safety is guaranteed. The equipment is low in cost, simple in structure, high in automation degree and suitable for large-area popularization.

The invention relates to the technical field of dual-power-supply switching power supply, and discloses a dual-power-supply switching power supply system which comprises a central processing unit, the receiving end of the central processing unit is in signal connection with the transmitting end of a total database, and the receiving end of the central processing unit is in signal connection with the transmitting end of a power supply switching unit. The receiving end of the central processor is in signal connection with the transmitting end of the power control unit. According to the dual-power-supply switching power supply system, the UPS power supply serves as common power, the distribution room power supply serves as standby power, one power supply path is added on the original basis, automatic switching is achieved after one power supply path loses power, and power supply safety of important equipment is guaranteed; the circuit monitoring unit is arranged to detect the power supply circuit in real time, the power supply control unit is controlled to adjust the current and voltage of the circuit, and the power supply monitoring unit is arranged to monitor the power supply of the UPS. The power supply monitoring unit controls the power supply switching unit through the feedback module and the negative feedback compensation module to replace the power supply of the power distribution room.

The invention discloses a hidden power distribution cabinet for smart home. The cabinet comprises supporting plates and a cabinet body; a limiting groove is formed in one side of the top of the supporting plate; roller grooves are formed in the two sides of the bottom of the cabinet body; rollers are rotationally connected to the interiors of the two roller grooves and the rollers are located in the limiting grooves; a back plate is fixedly connected to the top of one side of the supporting plate, a cover plate is fixedly connected to the top of the back plate, a groove is formed in the bottomof the cover plate, a push rod motor is fixedly connected to the inner wall of one side of the groove, and a push plate is fixedly connected to one end of the push rod motor. When the power distribution cabinet is used, the cabinet body is embedded in the wall body, the supporting plate, the back plate and the cover plate play a role in supporting the wall body, the cabinet body is hidden and protected, the occupied space of the cabinet body is saved, the rubber plate is exposed out of the wall body, the cavity is formed in the rubber plate, the influence of external impact on the cabinet body is buffered through air in the cavity, and power supply safety is guaranteed.

The invention provides an electric wire bundling device which comprises multiple single wire bundling mechanisms and spacing bars. Each spacing bar is connected between every two adjacent single wire bundling mechanisms. Each single wire bundling mechanism comprises a static bundling arm and a movable bundling arm, wherein the movable bundling arm covers the static bundling arm, the movable bundling arm and the static bundling arm jointly define an electric wire hole for a single electric wire to penetrate. Due to the spacing bars, a certain distance is reserved between two adjacent single wire bundling mechanisms, adjacent electric wires are effectively prevented from adhering and being gathered, heat produced in an electric wire gathering region is effectively radiated, and power supply safety is guaranteed. The electric wire bundling device has the advantages of being scientific in design and good in bundling effect and facilitating heat radiation.

The invention provides an uninterruptable power supply battery on-line detection device, which is characterized in that the device comprises a device for detecting battery voltage and internal resistance and having the following structures: a power supply bypass change-over switch, a power supply loop switching device, an MCU, a PWM voltage regulation circuit, an A / D converter, a signal acquisition circuit and a display device. The power supply bypass change-over switch and the power supply loop switching device are connected in parallel, and the tail end thereof is connected with a load; the signal acquisition circuit comprises a charging voltage acquisition circuit and a charging current acquisition circuit; an uninterruptable power supply signal collected by the signal acquisition circuit is output to the MCU for processing through the A / D converter to obtain ratio between the battery existing electric quantity and battery maximum capacity, and the ratio is sent to the display device for displaying; the output end of the MCU is electrically connected with the PWM voltage regulation circuit; and the output voltage of the uninterruptable power supply is adjusted according to an uninterruptable power supply temperature signal collected by an uninterruptable power supply temperature acquisition circuit.

The invention discloses a water-proof device for incoming line of meter box, including a barrel. Two rings are set at interval in the middle section of the barrel. Drainage holes connected with inner cavity of the barrel are set between two rings. The drainage holes are connected with diversion tubes. Front-end caps are installed in front of the barrel. Both the barrel's front-end part and front-end cap are equipped with threads used for connection. The barrel rear-end part is provided with rear-end cap. Both the barrel's rear-end part and rear-end cap are equipped with threads used for connection. Both the front-end cap and rear-end cap are equipped with holes for wires. The invention can be installed on the downlead in front of the meter box switch. The invention can prevent rainwater from entering to reduce failure outage of users and ensure power supply safety.