295 results about "Line switching" patented technology

The invention provides a global adaptive power supply adjustment method and system under the condition of local load increase, and relates to the technical field of power system dispatching. The method comprises the following steps: acquiring regional power grid topology, equipment parameters and real-time operation data; historical power consumption data of classified users in recent three years are collected and preprocessed; generating a reference load curve based on real-time data and a historical rule, calculating a deviation ratio, predicting a load in future 2 hours, and outputting a risk level; the regional energy storage equipment is called to dynamically adjust the discharge power when the risk is medium or low, and the adjacent regional resources are evaluated and cross-regional line switching and power supply support are executed when the risk is high or the energy storage is insufficient. Through layered adjustment and a dynamic response mechanism, rapid identification and accurate control of sudden load increase are realized, power supply stability and resource utilization efficiency are improved, and the method is suitable for local load fluctuation response of scenes such as residential areas and industrial parks.

The invention discloses an intelligent switching method and an intelligent switching system for double incoming lines of a supply guarantee type micro-grid based on a dynamic threshold value and multi-source cooperation, and relates to the field of intelligent control of micro-grids. In order to solve the defects of unstable switching, large energy storage investment, lagging operation state identification and low synchronous grid-connected efficiency of the existing supply guarantee type double-incoming-line micro-grid, electric energy quality abnormity of an original incoming line branch of the micro-grid is identified, instantaneous disturbance and continuous faults are distinguished, and judgment of an off-grid state is realized. Stable operation regulation of the island is carried out by adopting a multi-source coordination control and load grading optimization management mode; performing wide-frequency-domain electric energy quality analysis and dynamic impedance detection on the standby incoming line, and evaluating grid-connected compatibility and transient response characteristics of the standby incoming line; and in the island steady state, the micro-grid adaptively adjusts the voltage and the phase of the micro-grid side to meet the quasi-synchronization condition, and incoming line switching is realized. The method is mainly used for intelligent switching of the double incoming lines of the supply guarantee type micro-grid.

The invention belongs to the technical field of medical instruments, and particularly relates to a multi-continuous-shooting anorectum loop ligature device which comprises a shell, a negative pressure device, a take-up mechanism and a line switching mechanism are arranged in the shell, the shell is connected with a line breaking mechanism, the front end of the line breaking mechanism is connected with a loop ligature head, and the outer surface of the loop ligature head is used for being sleeved with an elastic line knot. A loop ligature cavity used for containing focus tissue is formed in the loop ligature head and communicated with a negative pressure device, the negative pressure device is used for enabling the loop ligature cavity to form negative pressure, two or more threading holes allowing elastic threads to penetrate through are formed in the loop ligature head, and one end of each threading hole is opened in the front end face of the loop ligature head. More than two elastic threads can penetrate through the loop ligature head, after loop ligature of one focus tissue is completed, the multiple elastic threads can be continuously replaced, loop ligature operation can be conducted on multiple focus tissues under the condition that the loop ligature device is not replaced, consumption of medical instruments is reduced, and medical cost is saved.

The invention relates to the technical field of electric power data monitoring, in particular to a fault diagnosis system and method based on an electric power dispatching data network, and the method comprises the steps: analyzing the equipment operation state of each network node based on the equipment operation data of each network node in the electric power dispatching data network, mining a fault association rule, and constructing a node fault knowledge base; predicting a high-probability fault node and a fault time period, and determining a node fault degree; constructing a dynamic network topology model of the nodes based on a graph theory, confirming a standby line set, analyzing the power supply stability of standby lines, and generating a line priority list; and switching the fault node into an optimal standby line confirmed by the line priority list, temporarily supplying power, performing real-time monitoring after the standby line is successfully switched, further executing a process of main and standby line switching-standby line no-load detection-resource release, and re-distributing the fault node into the power dispatching data network. And safe and stable operation of a power system is ensured.

The utility model provides a pluggable switching module and a switch cabinet, and relates to the technical field of low-voltage electric appliances. The pluggable switching module comprises an incoming line switching module and an outgoing line switching module which are arranged on a sealing plate of a vertical busbar of the switch cabinet side by side in the vertical direction, the incoming line switching module and the outgoing line switching module each comprise a contact assembly, and the contact assembly of the incoming line switching module is connected with the vertical busbar in a pluggable mode. A contact assembly of the outgoing line switching module is in pluggable connection with an outgoing line copper bar of the switch cabinet; the contact assembly comprises a shell and a plurality of contact sets arranged in the shell side by side, each contact set comprises one or more bridge-type contacts, and when the number of the bridge-type contacts is multiple, the multiple bridge-type contacts are arranged in a stacked mode. According to the pluggable switching module, the upper wire inlet and the lower wire outlet are achieved, the size of a cabinet body is reduced, the heights of the bridge-type contacts corresponding to all phases in the contact assemblies in the cabinet body are consistent, when large current and small current need to be switched, only the number of the bridge-type contacts needs to be increased or decreased according to the magnitude of the current, and the modification efficiency is improved.

The invention discloses a device and a method for testing the performance of a fast-assembly pipeline. The device comprises a host and a slave, the host comprises a host power supply management module, a boost circuit, an insulation current sampling module, a first single-chip microcomputer, a host communication module, a high-low voltage power supply switching module and a host line switching module. The slave machine comprises a slave machine power supply management module, a second single chip microcomputer, a slave machine line switching module and a slave machine communication module; the host line switching module is used for switching the host to different lines to be connected with the slave, and the slave line switching module is used for switching the slave to different lines to be connected with the host, so that the insulation resistance, the conductivity and the line sequence of the fast-assembly pipeline are tested.

The utility model discloses a six-arm type inspection robot capable of realizing single-line and double-line switching inspection, which comprises a robot body, and three primary line changing wheel discs are sequentially arranged on the robot body from front to back at intervals; two front movement mechanisms capable of independently rotating are arranged on the first-stage wire changing wheel disc at the front end; two self-power-taking mechanisms capable of independently rotating are arranged on the middle first-stage wire changing wheel disc; two rear movement mechanisms capable of independently rotating are arranged on the first-stage wire changing wheel disc at the rear end; the front movement mechanism, the self-power-taking mechanism and the rear movement mechanism are all connected to the overhead line in a suspended mode, and the front movement mechanism, the self-power-taking mechanism and the rear movement mechanism which are horizontally arranged on the same side are connected to the same overhead line in a suspended mode and can rotate synchronously when the overhead line is switched. According to the utility model, on-line real-time switching can be carried out, line obstacle crossing inspection of a single line and a part of split conductors can be completed, and the requirement of an inspection robot on the number of specific lines can be reduced.

The invention relates to the technical field of artificial intelligence, in particular to a power supply line control method and device of a power system, equipment, a medium and a program, and the method comprises the steps: obtaining operation state parameters of a main power supply line in the power system; determining a fault type and a fault position of the main supply line according to the operation state parameters; if the fault type is a first type of fault, screening an optimal standby line associated with the main power supply line, and executing a corresponding power supply switching action according to the optimal standby line and the fault position; and if the fault type is a second type of fault, executing a corresponding target operation according to the recovery state of the main power supply line within the delay protection duration. Therefore, the problems that in the related technology, the standby circuit switching technology mostly depends on fixed voltage / current detection logic, or simple interlocking judgment is achieved through a programmable logic controller, the risks of misoperation, operation refusal and the like exist, the multivariable combination situation is difficult to process, and the power supply safety margin cannot be dynamically evaluated are solved.

The invention belongs to the technical field of large blast furnace blower sets, and relates to an online switching method for the large blast furnace blower sets. Air blowers of the standby air blower set are started, air supply conditions are provided, before the air blower set is switched on line, the air blowers of the operating air blower set are switched from an automatic control mode to a manual control mode, and air supply flow values are recorded and serve as condition parameters during air mixing and splitting; the air blower stationary blade angle and the anti-surge valve opening degree of the standby air blower set are adjusted, so that the exhaust pressure of the standby air blower set is 4 kPa to 8 kPa higher than the air supply pressure of the operation air blower set; air outlet valves and air supply valves of the standby air blower sets are fully opened in sequence, and air mixing of the two air blower sets is achieved; the blast furnace side air supply flow serves as the reference, and loads of the two air blower sets are transferred. The on-line switching method for the large blast furnace blower unit is simple in step, ensures the effectiveness and reliability of the on-line switching process of the blower unit, and ensures the stability of the air volume and the air pressure and the safe production of the blast furnace.

The present disclosure is an optical line switching node device N which includes an optical switch part 2 which performs optical path switching between communication optical fibers F-0, F-1; a communication optical signal extraction part 5-0, 5-1 which extracts some of communication optical signals from one or both of the communication optical fibers F-0, F-1 and photoelectrically converts the extracted some of the communication optical signals; and a communication optical signal storage part 6 which stores some of communication optical signals photoelectrically converted in the communication optical signal extraction part 5-1, 5-1 and uses the stored energy to drive the optical switch part 2.

The invention discloses a power distribution network fault data preprocessing method and system based on multi-source information fusion, and relates to the technical field of power systems, and the method comprises the steps: constructing a dynamic topology manifold based on the physical connection relation of power distribution network equipment and multi-source data; manifold deformation caused by line switching or sudden load change is responded, and abnormal data are recognized in combination with the manifold curvature and the equipment connection path distance; encoding the abnormal data, the meteorological data and the equipment state data into quantum states, and generating entanglement feature vectors through quantum gate operation; performing chaos sequence modulation on the basic features to generate modulation features; performing quantum fusion transformation on the modulation feature and the entanglement feature vector to generate an enhanced feature; calculating topological space correlation, chaos behavior similarity and quantum correlation based on the enhanced features, and constructing a multi-dimensional fusion weight; and performing weighted fusion on the enhanced features according to the multi-dimensional fusion weight, and outputting a preprocessed fault feature vector.

The utility model provides a coaxial terminal plug, a signal acquisition circuit and a live-line switching electric energy meter practical training device, the coaxial terminal plug comprises a first coaxial wire core, a second coaxial wire core, a plug connector and a connecting piece, the middle part of the connecting piece is an insulating section, and the upper part and the lower part of the connecting piece are conductive sections; one end of the first coaxial cable core and one end of the second coaxial cable core extend out of the plug connector; the other end of the first coaxial cable core extends to the upper portion of the connecting piece, and the other end of the second coaxial cable core extends to the lower portion of the connecting piece. The signal acquisition circuit comprises the coaxial terminal plug, an MCU microprocessor and a state detection circuit, and the MCU microprocessor is connected with the corresponding coaxial terminal plug through the corresponding state detection circuit. The live switching electric energy meter practical training device comprises a virtual load power supply, a combined junction box and a target electric meter, and further comprises the signal acquisition circuit, and the signal acquisition circuit is used for acquiring the wiring state signal of the tail of the electric meter.

The invention provides automatic punching equipment for cooling fins, and relates to the technical field of punching equipment.The automatic punching equipment comprises a punching machine, a die frame and a punching die, a motor used for driving the die frame to rotate is fixedly installed in the punching machine, a die outlet is formed in a punching table top of the punching machine, and cavities are formed in the two sides of the die outlet; the multiple punching dies are annularly arranged on the die frame, a first limiting groove is formed in the rear side wall in the punching machine, a second limiting groove is formed in the front side wall in the punching machine, and the dustproof assembly is installed in the punching machine and used for preventing dust during shutdown; by means of the technical scheme, the purpose of die internal line switching of stamping equipment is achieved, the integral die mode is adopted, the problem of stress of a shaft rod of the die frame is solved through linkage of the bearing assemblies, the dustproof assembly and the die frame, and the die frame is convenient to use and high in practicability. Meanwhile, the dustproof function is achieved.

The invention belongs to the technical field of electric power system maintenance optimization, and particularly relates to an electric power circuit day-ahead maintenance plan optimization method considering voltage safety and stability, which comprises the following steps of: constructing an electric power circuit day-ahead maintenance optimization mathematical model by taking minimum unit operation cost and electric power circuit maintenance cost as targets; comprising the steps of setting an objective function and constraint conditions thereof; determining a power transmission line model and an admittance matrix, and then modifying the admittance matrix by adopting a branch addition method to obtain a line switching model based on the branch addition method; and performing staged solution on the line switching model, including three stages of generation and reduction of an uncertain scene, a mixed integer linear main problem and a nonlinear sub-problem, outputting a final solution result, and taking the final solution result as an optimal day-ahead maintenance plan of the power line. According to the method, a maintenance scheme with higher feasibility and robustness is formulated through a reasonable solving strategy, and the overall safety and reliability of a power system are improved.

The invention provides a transmission line dynamic switching optimization method and system, and relates to the technical field of data transmission, and the method comprises the steps: collecting the current fluctuation rate, the temperature rise rate and the historical fault frequency of each transmission line, so as to judge the potential fault risk of the corresponding transmission line, and when the comprehensive score is lower than a preset health threshold value, determining the potential fault risk of the corresponding transmission line; acquiring a load difference value between the slope of the power utilization curve in a preset time window and an adjacent time period so as to judge a load change trend of the corresponding transmission line; generating a corresponding line switching scheme based on the load change trend and the potential fault risk; and when the line switching scheme meets a preset operation safety threshold and a power supply continuity condition, executing line switching operation. Through the scheme, quantitative evaluation of the health state of the transmission line is realized, the potential fault risk and the load change trend can be accurately identified, it is ensured that the target line has enough power supply capacity and safety margin after switching, and the problems of incomplete risk evaluation and inaccurate scheme formulation in the transmission line switching process are solved.

The invention discloses a hybrid direct-current power transmission valve group, a direct-current power transmission system, a control device and a control method, the hybrid direct-current power transmission valve group comprises a non-direct-current blocking type valve group, and the non-direct-current blocking type valve group comprises an uncontrolled valve group or a non-direct-current blocking type full-controlled valve group; the direct current blocking type valve group comprises a half-control valve group or a direct current blocking type full-control valve group; any one of the non-control valve group and the non-direct-current blocking type full-control valve group is connected in series with any one of the half-control valve group and the direct-current blocking type full-control valve group. On-line switching of the non-direct-current blocking type valve group is achieved by connecting or disconnecting alternating current through the alternating current end, and direct-current line fault ride-through is achieved by controlling the direct-current blocking type valve group to be in negative pressure. The hybrid direct-current power transmission valve group is used for solving the problems that an existing converter structure needs to be provided with a large number of reactive compensation devices, loss is high, and cost is high.

The utility model discloses a composite protection intelligent cable for mountain rail transit, which belongs to the technical field of cables and comprises a circular copper conductor, and a conductor semi-conductive shielding layer, an insulating layer, an insulating semi-conductive shielding layer and a semi-conductive water-blocking buffer layer are sequentially arranged outside the circular copper conductor. A metal shielding layer is arranged in the semi-conductive water-blocking buffer layer, and a waterproof layer, an oxygen barrier layer, an armor layer, an alkali-free glass fiber tape wrapping layer, an outer sheath layer and a composite sheath layer are sequentially arranged outside the semi-conductive water-blocking buffer layer; and a temperature measuring and communication optical cable is arranged in the metal shielding layer. The 35kV flame-retardant B1-level composite protection intelligent cable for mountain rail transit has wear-resistant, rat-proof, termite-proof and ultraviolet-proof additional performance, a temperature-sensing detection optical cable is arranged on a metal shielding layer, the whole line is effectively monitored, management of a master console is matched, when the temperature exceeds the set temperature, automatic alarm, power-off protection and line switching are achieved, and the service life of the cable is prolonged. Fire situations such as electrical short circuit are avoided, and safe and reliable operation of rail transit lines is guaranteed.

A multi-stage evaluation electric power system short circuit and open circuit fault diagnosis method comprises the steps that voltage and current sensors and fault recording devices are installed at key nodes such as a main transformer and a distribution line, and three-phase voltage and current waveform data and zero-sequence components are collected in real time and transmitted to a fault diagnosis server; the server firstly performs preliminary judgment and alarm triggering on short circuit, open circuit and one-way grounding / electric leakage faults, then performs discrete wavelet decomposition and multi-scale time-frequency domain feature extraction on acquired waveforms by using a deep fault classification model based on wavelet analysis and neural network fusion, and realizes fine classification of the faults through a multi-layer residual neural network. And finally, establishing a fault diagnosis result self-adaptive evaluation and response mechanism, dynamically adjusting an alarm level and a switching scheme according to a fault type, realizing protection equipment tripping and fault isolation for a short-circuit fault, generating a standby line switching suggestion for an open-circuit fault, and effectively improving the accuracy and coping capacity of power system fault diagnosis.

The container conveying device and conveying line switching device comprises two conveying rails which are arranged in parallel, the height difference is formed between the two ends of each conveying rail, the two ends of each conveying rail are in transition connection through a connecting section, and a conveying gap is formed between the two conveying rails; the flanges protruding out of the necks of the bottle bodies are supported on the conveying track, the bottle bodies are located at the conveying gap, and the bottle bodies are conveyed in a height lowering mode along the track of the conveying track; according to the device, the flanging part of the bottle body is ingeniously utilized, and the conveying inclination angle of the conveying track can be changed at will according to needs, so that the conveyed bottle body does not topple due to the change of the conveying angle (height and linear-to-arc track); according to the bottle body lifting device, only the conveying track with the proper inclination angle and the conveying gap with the proper width need to be selected, the height of the bottle body is effectively reduced, and the production cost is reduced.

The invention relates to the technical field of power control equipment, in particular to a short-circuit-preventing power control box which comprises a box body, a monitoring mechanism is installed in the box body, the monitoring mechanism comprises a monitoring box, the monitoring box is fixedly installed at the bottom of an inner cavity of the box body, and a fixing seat is fixedly installed at the top of the monitoring box. A temperature sensor is fixedly installed at the top of the fixing seat, the main wire is fixedly installed in the fixing seat, first connecting wires are fixedly installed at the two ends of the main wire, the circuit switching mechanism is installed at the two ends of an inner cavity of the box body, and the circuit switching mechanism comprises two first supports. Through the arrangement of the monitoring mechanism, the short-circuit condition of the whole circuit can be monitored, once short-circuit hidden dangers occur, an alarm or a signal can be quickly sent out, maintenance personnel can know the short-circuit hidden dangers in time and take measures, and the situation that short-circuit faults further develop into serious electric power accidents is avoided.

The application relates to the technical field of automobile steel plate longitudinal cutting processing equipment, and particularly discloses an inner-outer plate passage line switching processing device, which comprises a base, a plate conveying passage, a plurality of inner plate guide rollers, outer plate guide rollers and a top extension mechanism, the plate conveying passage is arranged on the upper surface of the base, the inner plate guide rollers are rotationally assembled in the conveying passage in parallel at equal intervals along the plate conveying direction and are arranged in parallel with the inner plate guide rollers, and the top extension mechanism is assembled on the side of the output end of the base and has two working states of contraction and extension. The device realizes differential switching of the inner-outer plate plate conveying paths, when the top extension mechanism is contracted, the inner plate is conveyed by relying on the inner plate guide rollers; when the top extension mechanism is extended, the outer plate can be lifted to be separated from the inner plate guide rollers, and the output is completed only by the outer plate guide rollers. The device avoids the outer plate scratch defect caused by the residual impurities in the inner plate processing, eliminates the surface quality hidden danger of the plate, simplifies the inner-outer plate changing process in the production line and guarantees the high-precision surface processing quality of the automobile outer plate.

The invention provides a heat exchanger on-line switching system in an acid making process, which relates to the technical field of sulfuric acid preparation and comprises two sets of plate heat exchangers, two sets of differential pressure trigger components, a three-way valve, a valve core component, two sets of check valves and two sets of cooling components, the differential pressure trigger assembly comprises a power connection part and two deflection parts which are located on the outlet sides of the heat exchangers and deflect reversely under pressure, two outlets of the three-way valve are connected with the inlet sides of the two heat exchangers respectively, the valve element assembly comprises a horizontally-moving valve rod and a motor provided with a power receiving part, the valve rod is provided with a locking part, an inlet of the check valve is connected with an outlet of the three-way valve, and the opening and closing part is in linkage with the motor. When the pressure difference of the inlet and the outlet of a certain heat exchanger exceeds the limit and the driver is powered on to drive the valve rod to the first preset position, the corresponding check valve is fully opened, and when the driver is driven to the third preset position, the check valve is fully closed, and meanwhile the motor is powered off. Automatic, rapid and reliable online switching of the plate heat exchanger is achieved by integrating mechanisms such as differential pressure triggering, mechanical transmission and electric control.

The invention relates to monitoring equipment and a monitoring method for a power equipment monitoring scene, and belongs to the technical field of power monitoring. The monitoring equipment for the power equipment monitoring scene comprises a plurality of cross-core shells, insulated copper wires are arranged in the cross-core shells, the ends of the insulated copper wires are fixedly connected with connecting ends, and the two connecting ends are installed on the surfaces of the cross-core shells; the monitoring switching mechanism is arranged among the plurality of core penetrating shells; a dynamic monitoring strategy is implemented on the basis of line load characteristics of different power utilization scenes in a power-on operation state of a power system, and when the system is powered off to switch lines, the monitoring system can automatically and synchronously switch to a monitoring mode of a new line, so that the continuity and integrity of monitoring data in a line switching process are ensured, and the monitoring efficiency is improved. Therefore, the full-period monitoring effectiveness of the power line is guaranteed, and the monitoring effect of the power line is guaranteed.

The invention provides an all-optical line switching system based on an optical switch network, and the system comprises an optical switch which is provided with a plurality of optical switch communication modules. An optical line switching matrix is arranged in the optical switch, and the optical line switching matrix comprises a plurality of optical ports; each optical switch communication module is connected with an optical switch communication module of another optical switch or an external switching node communication module, and optical signals transmitted by the optical switch communication module and the optical switch communication module or the switching node communication module of another optical switch are communication light containing data optical signals and management optical signals. The communication light is formed by low-frequency modulation and superposition of a management light signal to a data light signal and / or formed by the management light signal and the data light signal in a wavelength division multiplexing mode; and after receiving the communication light, the optical switch communication module separates the data optical signal from the management optical signal, and transmits the data optical signal to the corresponding optical port. According to the invention, data optical signals and management optical signals can be transmitted simultaneously.

The present invention relates to an intelligent POE power supply and its implementation method, including a control module, a powered device identification module, a line switching module, a voltage output module, an analog detection module, and a wireless communication module; by applying the circuit of the present application, on the basis of standard powered device detection, a corresponding module for identifying the power of the powered device based on the voltage change curve or current change curve is added, enabling the POE power supply to be applicable to most non-standard powered devices with interfaces and power connection sequences consistent with those of standard powered devices but only different in operating voltage, greatly improving the applicability of the POE power supply. Moreover, for some new non-standard devices, compatibility can be quickly achieved by updating the data in the external host database.

The application discloses a communication base station power supply voltage control energy-saving system and method based on communication load. The system comprises a cloud platform, an energy storage battery, a line switching unit, a voltage control unit, and a commercial power grid. The commercial power grid supplies power to the energy storage battery and an antenna in the communication base station through the voltage control unit, and the energy storage battery supplies power to the antenna through the voltage control unit. The line switching unit is used for controlling the on-off of the line. The cloud platform is in communication connection with a control system in the communication base station, and the control system in the communication base station is in control connection with the line switching unit and the voltage control unit. In the method, the cloud platform obtains communication base station load data and antenna load typical power data through the control system, calculates the data and transmits the calculation results to the control system, and the control system controls the line switching unit and the voltage control unit to work based on the calculation results. The application can realize low-carbon energy-saving operation of the communication base station and reduce the operation cost.

The embodiment of the invention provides a line switching method and device, a medium and equipment. The method comprises the following steps: detecting whether a first operation parameter of a first temperature detection device which forms a loop with a control switch currently is abnormal or not; and if the first operation parameter is abnormal, a control instruction is sent to the control switch so as to control the control switch to be disconnected from the first temperature detection device, and then the control switch is switched to the second temperature detection device and connected with the first temperature detection device to form a loop. According to the circuit switching method provided by the embodiment of the invention, the abnormal operation of equipment caused by the failure of a single temperature detection device can be avoided, and a temperature detection device with higher low-temperature resistance and higher manufacturing cost does not need to be selected, so that the cost is reduced; and meanwhile, the redundant design that a plurality of temperature detection devices jointly detect the temperature parameters is not needed, so that the preemption of the system resources by the plurality of temperature detection devices is reduced.

The utility model provides a DC-DC detector, comprising a detector main body, one end of the detector main body is provided with four connecting lines, one end of each connecting line is connected with a high-voltage line switching box, a wire lapping clamp, a low-voltage power supply and a connector, and the other end of each connecting line is connected with a high-voltage line switching box, a wire lapping clamp, a low-voltage power supply and a connector. A high-voltage ammeter, a low-voltage ammeter, a high-voltage voltmeter, a high-voltage switch and a low-voltage switch are respectively arranged on the surface of the detector main body. According to the DC-DC detector provided by the utility model, the high-voltage wire switching box, the wire lapping clamp, the low-voltage power supply, the connector, the high-voltage ampere meter, the low-voltage ampere meter, the high-voltage voltmeter, the high-voltage switch and the low-voltage switch are respectively arranged on the detector main body with the four connecting wires. Fault elimination and position determination can be directly carried out through the detector main body, so that the convenience of bus maintenance can be improved, and the consumed time can be shortened.

This invention discloses an intelligent control method for industrial park power load, relating to the field of energy utilization technology. Addressing the problem of inability to intelligently control industrial park power load, this solution includes a server, power line control equipment, power quality monitoring equipment, and power line load monitoring equipment. The server uses current and historical external power quality data to perform weighted prediction of power quality trends for subsequent time periods and controls external power lines. The power line control equipment receives real-time switching control commands for external power lines from the server. The power quality monitoring equipment collects and sends multi-dimensional quality data from both external and internal power lines to the server in real time. The power line load monitoring equipment sends internal power line load data to the server in real time. The advantage lies in intelligently controlling the industrial park's power load through pre-allocated lines, dynamic line control, load balancing, and pre-generated production plans, thereby reducing production risks.

The utility model relates to the technical field of power supply and distribution, in particular to a toll station power supply line automatic switching circuit with an alarm device. The device mainly comprises a power supply end and a load end, and is characterized in that the power supply end comprises a main power supply end and an auxiliary power supply end; the automatic switching circuit further comprises a dual-power-supply change-over switch used for changing the connection relation between the main / auxiliary power supply end and the load end. A common switch path of the dual-power change-over switch is connected between the main power supply end and the load end; a standby switch path of the dual-power change-over switch is connected between the auxiliary power supply end and the load end; a plurality of auxiliary power supply ends are arranged; and a plurality of dual-power change-over switches are arranged. According to the automatic switching circuit for the power supply lines, seamless switching can be carried out on a plurality of normal power supply lines, the power-off influence of line switching on electric equipment of an expressway toll station is eliminated, then the smoothness of traffic flow passing is guaranteed, and the situation of traffic flow blockage is avoided.