35 results about "Switching loop" patented technology

The invention discloses a switch loop data extraction method, device and equipment based on phase locking, and the method comprises the steps: carrying out the interval change analysis of operation data in a ring main unit, and recognizing a communication abnormal node through a phase locking technology; associating a mechanical vibration source based on the communication abnormal nodes, detecting a vibration conduction path, extracting current fluctuation characteristics, and determining position deviation; the operation current intensity is adjusted in combination with fluctuation characteristic parameters, and accurate off-position control is achieved through reverse braking force; constructing a dynamic threshold reference based on frequency domain analysis, and generating a complete operation record according to the dynamic threshold reference and the accurate parking data; performing typed grouping and transmission optimization on the data, and controlling data switching by adopting a gradually migrated beat sequence; and finally, through signal reconstruction and data fusion technologies, a switch loop data set with continuous time sequence and complete space is generated. The method can effectively cope with communication interference, mechanical vibration and other complex environmental factors, and improves the integrity and accuracy of data acquisition.

The embodiment of the invention discloses an output current detection method, electronic equipment and a storage medium thereof. The method comprises the following steps: acquiring a midpoint current of a switching tube of the switched capacitor converter at a preset moment of a switching period of the switched capacitor converter; the midpoint current is the sum of the currents of the switching tubes; based on the midpoint current, obtaining an output current of the switched capacitor converter; at a preset moment, the midpoint current is equal to the output current; the preset time is set based on the duty ratio of the switch tube. According to the embodiment of the invention, for the switched capacitor converter, the output current is obtained by detecting the current of the switching tube at a specific moment according to the relation between the current of the switching tube and the output current, and a sampling resistor is prevented from being additionally arranged in an output loop, so that the system loss is reduced, the heat dissipation area is reduced, and the power density of the switched capacitor converter is improved; and the possibility that a sampling result is easily influenced by switching noise interference when a sampling resistor is additionally arranged in a high-frequency switching loop is avoided.

The invention discloses a spare power automatic switching device defect identification method and system based on online data analysis. The method comprises the following steps: step 1, constructing a set spare power automatic switching loop model; step 2, on the basis of the spare power automatic switching model constructed in the step 1, regularly obtaining the input quantity of the spare power automatic switching device and the input quantity of other protection devices in real time online through a protection information system; step 3, based on the input quantity information obtained in the step 2, identifying the defects of the spare power automatic switching device and the loop thereof in the normal operation state, the operation state and the fault state of the power grid by judging the correctness of the input quantity; and step 4, outputting whether the spare power automatic switching device is in a normal state or an abnormal state based on an identification result obtained in the step 3. According to the invention, the hidden risks of the spare power automatic switching device and the loop thereof can be identified and identified to the maximum extent through the voltage and current of the spare power automatic switching device, the switching value acquisition information and the logical judgment information of the spare power automatic switching device and the logical judgment information in combination with other information source data or different states of the power grid.

The present application relates to the technical field of electrical engineering, and more particularly to a pumping unit well anti-theft device, which comprises: a direct-current variable sequence module, which transmits positive and negative voltages of direct current output by a rectifying module to two wire cores of a cable, randomly switches loops among all wire cores of the cable, and sends wire core information corresponding to the positive and negative voltages after switching to a direct-current inverter decryption module; the direct-current inverter decryption module is connected to a pumping unit well through a frequency converter, and is used to connect wire cores where the positive and negative voltages after switching are located to positive and negative voltage direct-current busbars corresponding to the frequency converter according to the received wire core information. The present application solves the problem that the power transmission cable of the oilfield pumping unit well is stolen, which brings safety hazards to production and causes economic losses. The existing anti-theft method mainly relies on equipment inspection personnel to find the stolen power, and manual cutting is required when the power is stolen, which is delayed and cannot fundamentally solve the problem of power theft.

The embodiment of the invention provides a control method, device and equipment for low-voltage side switching equipment of a main transformer, a storage medium and a program product. The method comprises the following steps: acquiring a first current in a switch loop of first switch equipment; in response to the first current greater than or equal to the target safety current, determining at least partial load according to the first current and the target safety current; transferring at least part of the load of the first switching device to at least one second switching device, the second switching device having a load margin; the first switch device and the second switch device are power distribution control devices running in parallel on the low-voltage side of the main transformer; the target safety current is determined according to the historical measurement current of the switch loop and the historical measurement temperature under the historical measurement current. The method is used for improving the control accuracy of the low-voltage side switch equipment of the main transformer.

The invention discloses a high-voltage isolating switch testing device and method. The high-voltage isolating switch testing device comprises a controller and a display device, the display equipment is electrically connected with the controller and is used for receiving a fault phenomenon input by a user and transmitting the fault phenomenon to the controller; the fault phenomena at least comprise a switching-on fault and a switching-off fault; reference points which are acquired according to the high-voltage isolation switch loop and are arranged according to a first sequence are stored in the controller; the controller is used for acquiring a plurality of first reference points associated with the fault phenomenon and sending a detection instruction to the first reference points in sequence according to a first sequence; the display device is also used for displaying the detection instruction and receiving a detection result corresponding to the detection instruction input by the user; the controller is used for obtaining the fault position of the high-voltage isolation switch loop according to the detection results of the plurality of first reference points. According to the technical scheme provided by the invention, the detection efficiency of the electrical loop fault of the high-voltage isolation switch can be improved.

The invention relates to the technical field of safe power supply of a power system, in particular to an emergency recovery method and equipment for a coal mine power supply network, and aims to avoid secondary tripping. The emergency recovery method for the coal mine power supply network comprises the following steps: constructing a topological structure chart of the power supply network, and marking a hierarchical relationship of power supply equipment; electrical parameters of each switch loop in the power supply network are obtained in real time through the SCADA system; under the condition that a tripping phenomenon occurs, positioning superior power supply equipment which does not trigger a protection action according to the topological structure diagram, and calculating a load rate of the superior power supply equipment according to the electrical parameters; and when the load rate is less than or equal to the safety threshold, starting the lower-level equipment of the upper-level power supply equipment in sequence according to the topological structure diagram, and dynamically updating the starting interval time. According to the invention, instantaneous overload in the recovery process can be avoided, so that secondary tripping is avoided.

The application discloses a high-voltage loop control method, a master control box and a power utilization equipment thereof, and is applied to a battery management unit. The battery management unit and a manual maintenance switch are connected in series to form an interlocking switch loop. A control unit is in communication connection with the high-voltage loop. The method comprises the following steps: collecting circuit parameters of the interlocking switch loop; judging whether the manual maintenance switch in the interlocking switch loop is turned on or not according to the circuit parameters of the interlocking switch loop; and if it is judged that the manual maintenance switch in the interlocking switch loop is turned on, turning on the high-voltage loop.

To provide an electric leakage detection system and an electric leakage detection method applied to a circuit board including a plurality of traces.SOLUTION: The system includes a plurality of parallel switch loops, a voltage generator, a controller, and a decision device. Providing a plurality of parallel switch loops, each switch loop being disposed with a first switch, a second switch, and a probe connected to a node between the first switch and the second switch, the probe corresponding to one of the plurality of traces of the circuit board, inputting a voltage to the first switch of each of the plurality of parallel switch loops, controlling conduction of each of the first switch and the second switch of each of the plurality of parallel switch loops to generate an electrical signal between two of the plurality of traces of the circuit board, and receiving the electrical signal and determining whether the electrical signal exceeds a preset threshold.SELECTED DRAWING: Figure 2

The embodiment of the invention discloses an output current detection method, electronic equipment and a storage medium thereof. The method comprises the following steps: acquiring average current of a switching tube of the switched capacitor converter in N switching periods; and obtaining the output current of the switched capacitor converter based on the duty ratio of the switching tube and the average current. According to the embodiment of the invention, the output current is obtained by detecting the current of the switching tube and the duty ratio of the corresponding switching tube according to the relation between the current of the switching tube and the output current, and a sampling resistor is prevented from being additionally arranged in an output loop, so that the system loss is reduced; the heat dissipation area is reduced, the power density of the switched capacitor converter is improved, and the possibility that a sampling result is easily influenced by switching noise interference when a sampling resistor is additionally arranged in a high-frequency switching loop is avoided.

A relay contact rebound time testing device belongs to the technical field of relay time characteristic testing, and comprises a relay testing socket, a main control board, a touch screen and a 24V driving power supply, the main control board is respectively connected with contacts of the relay testing socket through a main control board connector, the touch screen is connected with the main control board through a serial port, and the 24V driving power supply is connected with the main control board. The main control board is provided with a single-chip microcomputer connected with the relay, input pins of the single-chip microcomputer are respectively connected to a series loop and a parallel loop of contacts of the tested relay, and output signals of the single-chip microcomputer are connected to a contact relation logic switching loop and a power supply access loop of the tested relay. According to the utility model, the contact of the relay to be tested is connected to the test interface of the main control unit on the main control board through the logic switching of the internal circuit of the main control board, the relay to be tested is driven by the 24V driving power supply to act, the automatic test of the relay contact rebound is completed, the test result is automatically saved, and whether the test result is qualified is automatically judged.

The application discloses a silicon controlled rectifier arc extinguishing failure detection method, device, medium and product, and relates to the field of relay arc extinguishing. The method comprises the following steps: when the first relay needs to be attracted, the silicon controlled rectifier is turned on, and the first relay is triggered to be attracted after detecting that the real-time current of a switch loop exists for a first preset time; after the first relay is attracted, the silicon controlled rectifier is turned off after waiting for a second preset time; after the first relay is attracted, the first current effective value of the switch loop is detected; when the first current effective value is lower than a preset threshold value and the duration reaches a third preset time, it is determined that the first relay is in an abnormal state; when the first relay needs to be turned off, the silicon controlled rectifier is turned on, and the first relay is synchronously triggered to be turned off; whether the first relay is in an abnormal state is further determined. The method realizes comprehensive detection on the working state of the silicon controlled rectifier arc extinguishing circuit, and improves the reliability of the silicon controlled rectifier arc extinguishing circuit in actual application.

The invention relates to a transformer substation high-voltage switch loop resistance rapid test structure and test method. The transformer substation high-voltage switch loop resistance rapid test structure comprises a high-voltage switch loop resistance tester, a bus tie switch, a plurality of first-section high-voltage switches, an isolation switch, a filtering device and a plurality of second-section high-voltage switches. Three-phase power supply wire inlet ends of the bus tie switch and the plurality of first-section high-voltage switches are connected to a high-voltage side first-section bus, a three-phase output end of the bus tie switch is connected in series with a three-phase output end of the isolation switch, and three-phase power supply wire inlet ends of the isolation switch and the plurality of second-section high-voltage switches are connected to a high-voltage side second-section bus. The voltage sampling end of the high-voltage switch loop resistance tester is connected to the two ends of a loop to be tested through one filtering device, and the current sampling end of the high-voltage switch loop resistance tester is connected to the two ends of the loop to be tested through the other filtering device; according to the high-voltage switch cabinet, a test can be conveniently carried out at the feed-out end of the high-voltage switch cabinet, the working efficiency is greatly improved, and meanwhile, high-frequency interference brought by a high-voltage station during testing is also avoided.

The utility model discloses a detection device of a feeder automation terminal, and relates to the technical field of feeder automation terminals. The detection device of the feeder line automation terminal comprises an input interface, a voltage identification conversion loop, a closing time relay, an opening time relay, an opening and closing loop, an energy storage loop, a grounding knife loop, an isolation knife loop, a detection loop, a switching loop and a conversion loop, and the input interface is used for receiving an input signal; the voltage identification conversion loop is connected with the input interface; the closing time relay and the opening time relay are connected with the voltage identification conversion loop; and the opening and closing loop is respectively connected with the closing time relay and the opening time relay. The detection device of the feeder automation terminal according to the embodiment of the utility model can be compatible with various operation voltage grades, and can meet the requirements of electromagnetic and electronic tests.

The utility model relates to the field of liquid flow energy storage systems, in particular to an SOC (system on chip) balance switching system of a liquid flow energy storage system, which comprises an equalizer, N liquid flow subsystems to be equalized, N control loops, N controlled loops and N switching loops, and the N control loops are N groups of relay coils connected in parallel between a power supply end and a PLC (programmable logic controller) output end; the controlled loop comprises a relay normally-open contact, a relay normally-closed contact and N groups of direct-current contactor coils, the relay normally-open contact and the relay normally-closed contact are contacts corresponding to the relay coil on the control loop, each group of direct-current contactor coils comprises two direct-current contactor coils which are connected in parallel, and the N paths of switching loops are 2N contactor normally-open contacts. And the 2N contactor normally open contacts are connected between the equalizer and the positive and negative electrodes of the N to-be-equalized liquid flow subsystems connected in series, and N is a positive integer greater than 1. The system is suitable for various energy storage systems with different scales, and can solve the problem that the expansibility of current balance switching is limited.

The invention discloses an emission coupling method under a radiation electric field of an internal chip port of an intelligent terminal. When intelligent equipment suffers from strong transient interference such as switching on and switching off of a high-voltage switch, oscillation impact and the like, a severe radiation electric field is generated due to the fact that impact current flows through a high-voltage switch loop. In order to deeply analyze the disturbed degree of the electrified railway intelligent terminal suffered from strong electromagnetic transient interference of a high-voltage switch and explore the disturbed condition of an internal intelligent chip, a systematized electric field radiation interference calculation model comprising a transmitting conductor, a PCB card and the intelligent chip is provided and designed; and further considering the simulation convergence problem caused by the fine structure of the intelligent chip, and solving the simulation convergence problem by using a finite element acceleration simulation method to obtain a specific electric field intensity value. According to the method, the electromagnetic interference problem of intelligent terminal equipment can be researched, a feasible method is provided for electromagnetic emission coupling calculation of the surface length transient state, and a solution and reference are provided for electromagnetic calculation.

The utility model belongs to the field of electrical technology, and discloses a fast switching device for a single-bus segmented power supply system, which aims at solving the problems in the segmented power supply system in the prior art and comprises a main switching loop, a control power supply fast switching loop, a voltage detection comparison loop, a zero-current over-current detection circuit and a PLC (Programmable Logic Controller) control loop, the main switching loop is used for providing rapid bypass switching for a standby breaker for opening, and the voltage detection comparison loop and the zero-current over-current detection circuit access a comparison detection logic signal to the PLC control loop. And the PLC control loop is used for outputting the detected voltage sag condition and an upper computer instruction to the main switching loop for switching and controlling the power supply switching of the power supply fast switching loop. When voltage sag occurs in a certain section of the bus or the power supply is withdrawn, the other section of the bus is quickly connected, so that the influence caused by the voltage sag is reduced or avoided; meanwhile, the problem that in a single-bus sectional power supply system, the operation mode is changed under the condition that equipment on a bus is not stopped, and loop closing operation is needed is solved.

The invention discloses an AI self-tuning direct-current converter system based on a coupling voltage-multiplying resonance network, which belongs to the technical field of power electronic converters and comprises an input filtering and switching loop, a charging and discharging loop, a voltage-multiplying filtering output loop and a deep learning control subsystem. Through the boosting effect of the voltage-multiplying filtering output loop and in combination with the charging and discharging characteristics of the three-winding coupling inductor, the turn ratio of the three-winding coupling inductor and the duty ratio D of the switching tube are cooperatively adjusted, so that the DC converter realizes high-gain and high-flexibility boosting performance; according to the topology, soft switching is achieved through resonance formed by the leakage inductor and the capacitor, and the working efficiency is remarkably improved; through deep learning and AI training, specific parameters of elements in a circuit are set and parasitic parameters are determined, and through a mode of AI self-tuning PID parameters, a control mode is simplified, and closed-loop control of a system is realized.

To reduce the time required for determination or examination of an operation procedure or a switching operation when carrying out loop switching of a distribution system.SOLUTION: In an information processing device 100, a storage unit 111 stores measurement data with respect to a plurality of automatic voltage regulation devices and automatic reclosing devices installed in a distribution system, a processing unit 112 aggregates measurement results indicated by the measurement data to generate assisting information with respect to loop switching of the distribution system, and an output unit 113 outputs the assisting information generated by the processing unit 112 in a displayable manner when determining an operation procedure of the loop switching.SELECTED DRAWING: Figure 1

The invention discloses a transformer air cooling control system dual-power-supply automatic switching loop and a control method, and relates to the technical field of power equipment control. The method comprises the following steps: monitoring voltage and frequency parameters of main and standby power supplies in real time and calculating quality indexes thereof; meanwhile, on the basis of the transformer winding temperature, the environment temperature and the change rate of the transformer winding temperature and the environment temperature, the future trend is predicted through an ARIMA time sequence model, and therefore the cooling load requirement is dynamically evaluated; and finally, judging and executing switching by integrating the power supply quality index, the cooling load demand and the change trend thereof through the integrated decision logic and integrating the power supply quality index and the cooling load demand. A corresponding loop comprises a power supply monitoring module, a power supply quality calculation module, a load demand acquisition module, a switching judgment module and a switching control module. According to the invention, by introducing a self-adaptive threshold adjustment mechanism based on the cooling load, the problem that a traditional fixed threshold switching method cannot adapt to the dynamic working condition of the transformer is solved, and more accurate, reliable and impact-free dual-power automatic switching is realized.

The invention provides an SRB switch loop detection method, a related device and a computer storage medium, and the method comprises the steps: receiving message information, and recording the message information and a first port number into a message table; wherein the message information comprises a timestamp and source address information; the first port number is a port number receiving the message information; if a second port receives the message information which is the same as the timestamp and the source address information in the message table, determining that a loop exists at present; wherein the second port is a port except the first port; and if no message information which is the same as the timestamp and the source address information is received by the second port in the message table, determining that no loop exists at present. According to the invention, no extra loop detection protocol is needed, no complex configuration is needed, whether the loop appears on the SRB switch can be detected only by using the characteristics of the service message, and the loop detection efficiency and accuracy are effectively improved.

The utility model discloses a detection cabinet and a power grid simulator. The detection cabinet comprises a cabinet body; the switching loop is arranged in the cabinet body and comprises an input end, an output end, a current detection assembly and a detection cable, the input end is used for being connected with the input cable, the output end is used for being connected with the output cable, and the detection cable is electrically connected between the input end and the output end and penetrates through the current detection assembly; the current detection assembly can generate a current detection signal based on current detection of the detection cable. According to the detection cabinet provided by the embodiment of the utility model, frequent threading is not needed when current detection is carried out, and damage to high-voltage cables and current detection related equipment is reduced.

The application discloses a substation transformer spare phase automatic switching loop, characterized in that: collecting main transformer normal phase related primary equipment signals, the main transformer normal phase including transformer A phase, transformer B phase and transformer C phase, judging whether the spare phase is put into based on the three-phase state of the main transformer normal phase, when the spare phase is put into, switching the non-electric quantity signal of the spare phase and the current signal of the spare phase to the control protection circuit of the relay protection. The main transformer normal phase related primary equipment signals include the position state of the main transformer high-voltage side knife switch, the position state of the main transformer high-voltage side bypass knife switch and the position state of the main transformer medium-voltage side knife switch. The conditions for judging whether the spare phase is put into include: when the corresponding phase of the main transformer normal phase on both sides of the bypass knife switch is closed, it indicates that the corresponding phase of the main transformer normal phase is withdrawn, and at the same time, the spare phase is in the put-in state; and only when the three phases of the main transformer normal phase are in the put-in state, the spare phase is withdrawn.

The invention discloses a method for judging a hot standby state of voltage output equipment based on induced voltage, which is used for an equipment switch loop, and comprises the following steps of: switching power transmission of a circuit breaker switch to a hot standby state, and specifically, acquiring auxiliary contact position signals of a grounding knife switch, an isolation knife switch and the circuit breaker switch in real time; judging whether the equipment does not enter a hot standby state or not according to the auxiliary contact position signal, if so, outputting a corresponding prompt, and if not, executing the next step; acquiring three-phase phase voltage and line voltage of a to-be-transmitted side of the circuit breaker switch; and sequentially carrying out induced voltage threshold, balance degree and out-of-limit judgment, if any item is unqualified, outputting a corresponding abnormal prompt, and if all items pass, outputting that the hot standby state is normal and storing data. During reverse power failure, verification can be completed only by executing out-of-limit judgment. According to the invention, accurate positioning of abnormal links is realized, safety and efficiency of switching operation are improved, and bidirectional closed-loop control of power transmission / power failure is realized.

The invention relates to a coupled inductor-based six-switch-tube gain broadening type LLC resonant converter topological structure and a control method thereof. The coupled inductor-based six-switch-tube gain broadening type LLC resonant converter topological structure comprises a first port and a second port, the first port is used as a power supply end, and the second port is correspondingly used as a load end; the system also comprises a first switch loop and a second switch loop. The first port is internally provided with an inductor Lr1 and an inductor Lr2, the inductor Lr1 and the inductor Lr2 are mutually coupled to form a pair of coupling inductors, the first port is internally provided with two resonant capacitors, namely a resonant capacitor Cr1 and a resonant capacitor Cr2, and the excitation inductors of the transformer T1 and the transformer T2 are an excitation inductor Lm1 and an excitation inductor Lm2 respectively; by applying the technical scheme, the energy transfer efficiency of the converter can be improved.

The invention discloses an unconditional stable bidirectional amplifier based on a negative feedback technology, which comprises an amplifying circuit and a switch control circuit, and the amplifying circuit is connected with the switch control circuit, so that the related problem of insufficient stability of the existing bidirectional amplifier is solved. According to the bidirectional amplifier, by introducing negative feedback, interference in the amplification process is effectively restrained, the stability and accuracy of output signals are ensured, the bidirectional amplification function is completed only through a single amplifier, and compared with an existing technology of utilizing two amplifiers and adopting a single-pole double-throw switch for switching, the bidirectional amplifier has the advantages of being simple in structure and convenient to operate. According to the bidirectional amplifier, the size of a chip can be reduced to about 1 / 2, meanwhile, due to the fact that the chip is only provided with a single amplifier, compared with an existing bidirectional amplifier structure, power consumption can be reduced, absolute stability and reverse isolation can be guaranteed in the process of forming a switch loop of the amplifier, and the reliability of the amplifier is improved. And the single-amplifier scheme in the invention does not need to be controlled by a switching power supply, so that the bidirectional switching speed is also greatly increased.

The utility model discloses a channel switching connector used for calibrating an SOE tester. The channel switching connector comprises a first dial switch, a second dial switch, an SOE tester connection socket, a first female joint, a second female joint and a DC power supply socket connected with a DC power supply for power supply. A first dial switch and a second dial switch are adopted to form a switch loop for calibrating the SOE tester, a direct-current voltage source is connected into the switch loop of the calibrated tester, the successive action closing process of a switch group is converted into a form of sequentially outputting levels, and the time difference generated by any two paths of levels is measured through a time interval measuring instrument. Therefore, the calibration of the time interval parameter of the SOE tester is realized.

The application relates to a high-voltage switch loop resistance rapid testing method, device, equipment, storage medium and program product. The method comprises the following steps: sequentially applying a strong pulse current with a first time period and a target test current with a second time period to a conductive loop of a high-voltage switch to be tested; the first time period is less than the second time period, and the current value of the strong pulse current is greater than the current value of the target test current; during the application of the target test current, after the loop current of the conductive loop enters a stable state, a plurality of loop voltage values and corresponding plurality of loop current values between the two ends of the conductive loop are collected; and the loop resistance value of the conductive loop is determined according to the plurality of loop voltage values and the corresponding plurality of loop current values between the two ends of the conductive loop. The method can improve the high-voltage switch loop resistance test efficiency.

The invention belongs to the technical field of analog integrated circuits, and particularly relates to a smooth switching loop selector which comprises a bias circuit, four loop comparators connected in parallel and a voltage feedback circuit. The voltage feedback circuit is used for generating a reference voltage according to signals output by the four loop comparators connected in parallel, the four loop comparators connected in parallel are used for being combined with the voltage feedback circuit to generate a composite feedback voltage, and the generated reference voltage and the composite feedback voltage are sent into the error amplifier to control a loop. The loop selection circuit provided by the invention adopts a compensation network multiplexing strategy, stability of four loops is realized through a single Type-II compensation network, and 75% of the layout area of the compensation network is reduced; in addition, by introducing a multi-loop composite feedback design, the smoothness of loop switching is realized.