2074results about "Arrangements responsive to excess current" patented technology

A DC-DC conversion apparatus for a charging pile includes a group of power terminals, a plurality of groups of load terminals, and a plurality of isolated DC-DC conversion circuits. An input end of each isolated DC-DC conversion circuit is connected to the group of power terminals, and output ends of the plurality of isolated DC-DC conversion circuits are connected to the plurality of groups of load terminals in a one-to-one correspondence, so that the DC-DC conversion apparatus for a charging pile forms an architecture with a single input and a plurality of independent outputs. In this way, the DC-DC for a charging pile can have high power utilization while implementing wide-range power outputs.

A system includes control circuitry configured to manage faults of an electrical system. The system is configured to monitor consumption for a plurality of electrical circuits, such as branch circuits, and generate device information about a device based on an electrical current measurement from at least one electrical circuit of the plurality of electrical circuits to which the device is coupled. The system is also configured to determining that an event has occurred based on the device information and interrupt current of the at least one electrical circuit, generate a notification, communicate a control signal to the device in response to the event occurring to mitigate the event, actuate a second device in response to the event, or a combination thereof.

The invention discloses a graph topology-based power distribution network protection parameter automatic checking method and system, and belongs to the technical field of power transmission and distribution. The method comprises the steps of obtaining a transformer substation outgoing line protection constant value, a terminal protection constant value, line zero-sequence current data, a topological relation below the transformer substation, line parameters and operation state data of lines, switches and distribution transformers; sVG analysis and power distribution network topological graph construction are carried out; subgraph extraction and hierarchy analysis; line parameter and protection constant value verification, including line parameter verification and protection constant value verification; the line parameter verification comprises branch line segment verification and switch position verification; the protection constant value verification comprises overcurrent I section verification, overcurrent II section verification and zero sequence protection verification. According to the method, automatic checking of the power distribution network protection parameters is realized, the checking efficiency and accuracy are greatly improved, and the method is suitable for a protection constant value checking scene of a complex power distribution network.

The invention provides a control method and system for an energy storage PCS with an AC / DC circuit breaker and a storage medium, and the method comprises the steps: firstly, synchronously collecting the electrical parameters of a DC side and an AC side, and carrying out the preprocessing of the collected data, so as to form a standardized electrical matrix; then, all parameters in the electrical matrix are cyclically compared with corresponding early warning thresholds, first-level thresholds, second-level thresholds and fusing thresholds in a multi-level threshold mapping table; if the pre-warning threshold value is exceeded, a log is recorded, if the pre-warning threshold value is exceeded, self-healing operation is executed, if the pre-warning threshold value is exceeded, turn-off operation is executed, and if the pre-warning threshold value is reached, physical fusing is triggered; meanwhile, all operation logs are recorded, and the threshold mapping table is dynamically optimized by analyzing log data; according to the method, the fault response speed and the protection precision are improved through multi-level threshold serial comparison and a cooperative protection mechanism, the stability and the reliability under different working conditions are enhanced through the adaptive learning capability, and meanwhile, the whole life cycle cost is reduced.

The invention discloses a household wall-mounted energy storage power supply, and belongs to the technical field of energy storage equipment, the household wall-mounted energy storage power supply comprises a hanging plate, a power supply body and an equipment box, the top of one side of the power supply body is fixedly provided with a hook, the hook is inserted into the hanging plate, the bottom of the power supply body is provided with a locking mechanism, and the locking mechanism is connected with the hanging plate. An electromagnet, a linkage mechanism, a connection mechanism, a slide rheostat, a monitoring mechanism, a buffer mechanism, a controller and a stop button are arranged in the equipment box, the electromagnet is connected with the power source body in series, the linkage mechanism comprises a sealing box, a piston plate, a sealing cylinder and an iron sheet, the iron sheet is embedded in the piston plate, and the piston plate is connected with the sealing cylinder. And a sealing disc is mounted in the sealing cylinder in a sliding manner. The transverse rod is linked with the slide rheostat to automatically adjust the resistance of the cooling fan, the resistance is reduced when the current is increased to improve the power of the fan, the dynamic matching of the cooling intensity is realized, and in addition, the system is additionally provided with multiple safety protection mechanisms.

The invention relates to the field of display, and discloses a short-circuit protection circuit, an array substrate, a display device and a short-circuit protection method.The short-circuit protection circuit is used for an OLED device and comprises the steps that an information sensing module obtains the actual working current of the OLED device and real-time parameters related to the working state of the OLED device; the dynamic expectation calculation module calculates the dynamic expectation working current n of the OLED device according to the real-time parameters and a preset OLED electrical characteristic model; the decision module synthesizes the actual current, the expected current and the current change rate / fluctuation amplitude to generate a risk judgment signal; and the response control module executes protection operation according to the judgment signal. According to the OLED short-circuit protection method, the accuracy, the sensitivity and the intelligent management level of OLED short-circuit protection are remarkably improved through the technology of dynamically calculating the expected current and carrying out decision making and parameter self-adaptive adjustment by fusing the actual current time sequence characteristics.

The invention relates to the technical field of power system relay protection, in particular to a self-adaptive direction overcurrent protection method and system based on real-time load flow calculation. According to the method, operation data are collected and preprocessed in real time, current operation state parameters are obtained based on load flow calculation, and the action current constant value of direction overcurrent protection and the action angle constant value of a direction element are adjusted in a self-adaptive mode in combination with a network topology structure and protection configuration information. When the fault is judged, the real-time operation data and the adjusted action constant value are combined, so that the accurate judgment of the fault direction of a complex power grid structure including a distributed power supply, a micro-grid or an alternating current / direct current hybrid connection and the like and the reliable execution of the protection action are realized; therefore, the problems that a conventional protection constant value is fixed and is difficult to adapt to the change of a power grid operation mode and the fault characteristic change is caused by the access of a distributed power supply are effectively solved, and the selectivity, sensitivity and adaptability of overcurrent protection are remarkably improved.

The invention discloses a frequency converter multi-stage cooperative rapid overcurrent protection circuit, and the overcurrent protection circuit cooperates with an IGBT inverter circuit, an IGBT drive circuit, a current sampling circuit and a master control MCU of a frequency converter to construct a three-stage cooperative protection system composed of hardware-stage extreme rapid protection, hardware-stage rapid protection and software-stage intelligent protection. And independent action and information interaction between the stages can be realized through circuit design. Compared with the prior art, protection blind areas are eliminated, nanosecond-microsecond level extreme protection is achieved, a multiple and high-reliability redundancy protection system is constructed, intelligent grading processing of faults is achieved, and the diagnosability of the system is enhanced.

The invention provides a power distribution network relay protection fixed value setting method and device. The method comprises the following steps: constructing a primary equipment topology connection relation of a power distribution network outgoing line unit; identifying the distributed new energy equipment in the outgoing line unit; searching a path from the distributed new energy equipment to an equivalent bus according to the topological connection relation; recording a primary equipment set in the path; integrating the primary equipment set and the equivalent bus to form global topological connection; calculating the short-circuit current of the power distribution network based on the global topological connection; and setting a fixed value of the relay protection device according to the short-circuit current. According to the invention, by constructing the multi-outlet-unit collaborative topology and identifying the new energy path, the calculation model is simplified, the new energy influence of the same bus is considered, and the short-circuit current calculation precision is improved, so that the efficient and accurate setting of the relay protection setting value is realized, and the stable operation of the power grid is ensured.

The invention provides a combined full-range controllable protection device, which belongs to the technical field of circuit protection and comprises a trigger body, a breaker and a fuse. The trigger body and the breaker are connected in series, and the trigger body and the breaker which are connected in series are connected in parallel with the fuse; when the circuit is abnormal, the trigger body is fused to carry out primary protection on the circuit, the fused trigger body also generates an electric signal and transmits the electric signal to the breaker, the breaker cuts off the circuit to carry out secondary protection on the circuit, current flowing through the trigger body and the breaker is merged into a branch where the fuse is located, and the fuse is fused to form third-level protection on the circuit; therefore, multi-stage protection is realized through the trigger body, the breaker and the fuse, and the time sequence cooperation of multi-stage protection actions not only avoids misoperation, but also can provide redundancy protection when a serious fault occurs, so that quick response and reliable cut-off when the circuit is abnormal are realized on the basis of keeping low loss when the circuit is normal, and the circuit breaker can be suitable for high-voltage and large-current breaking.

The invention discloses a method and a system, and relates to the technical field of relay protection. The method comprises the following steps of: acquiring electrical data of a synchronous parallel point, inputting two paths of voltage data, setting a setting value, judging the state of the synchronous parallel point based on the input two paths of voltage data, and performing manual intervention on asynchronous protection after asynchronous protection quits. According to the grid-connected asynchronous protection method provided by the invention, the state of a synchronous parallel point can be accurately judged by comparing the output two paths of voltage data with the setting value set in the device, the fault condition and position of a power grid can be more accurately judged, the abnormal state can be quickly detected, a circuit breaker can be timely pulled open, and the safety of the power grid is ensured. The method prevents generation of strong impact current, prevents burning loss of equipment, effectively protects electrical primary equipment, compares timing time with a setting value set by a system, ensures that non-synchronous protection does not continue to work due to misoperation, and enables an electric power system to recover to normal more quickly. According to the invention, better effects are achieved in the aspects of preventing electric appliance burnout and response time.

The invention discloses a rapid fault isolation method integrating protection, measurement and control of a box-type substation, particularly relates to the technical field of fault isolation of a power distribution network, and aims to solve the problem that an existing box-type substation is not complete in protection action information, disturbance exists in measurement and a primary wiring relation is complex. The problems of difficulty in timely and accurate judgment of a fault section, large isolation range, insufficient supply guarantee of important users and lack of traceable evidence chain in a fault processing process are solved. The method comprises the following steps: dividing sections according to primary switches and cable joints in a box-type substation, establishing a section-level topology model for unified time service and fault evidence fingerprints bound with protection configuration, scoring operation slices based on section fault hypothesis and a theoretical event mode, and solving a minimum isolation switch set under isolation constraint, so as to obtain a minimum isolation switch set; therefore, when the protection action is incomplete, the measurement is disturbed and the wiring is complicated, the fault section can still be locked, and an isolation scheme considering the user supply guarantee and the electrical safety boundary is generated, so that the fault isolation correctness and rapidity are improved.

A series-type hybrid circuit breaker to provide protection against short circuit faults in DC or AC power circuits. A series-type hybrid circuit breaker (SHCB) forces a fault current into a high-frequency AC current with zero crossings and allows a mechanical circuit breaker to disconnect the faulty branch. The SHCB injects a transient counter voltage pulse via a pulse transformer into the main power loop upon detection of an overcurrent condition and forces the fault current to change its original direction and cross zero to a negative peak value. A generation power electronic circuit on the primary side of the transformer controls the discharge of a capacitor to generate the counter voltage pulse during the first phase of each switching cycle of the fault interruption process. The power electronic circuit then changes the polarity of the injected secondary voltage and forces the fault current to change direction and cross zero again.

The invention relates to the technical field of transformer overload protection, in particular to a transformer overload protection device with a mechanical self-adaptive adjustment function. The transformer overload protection device with the mechanical self-adaptive adjustment function comprises a supporting frame, a transformer, an installation frame, a drop-out fuse, a sliding rail, a lifting frame, a supporting block, a closing piece, a spring, a control assembly and a self-adaptive adjustment assembly, the transformer is installed on the lower side of the supporting frame, and the installation frame is connected to the upper side of the supporting frame. Through the preset height difference of the closing piece and the linkage design of the control assembly, the standard closing sequence of a windward side, a leeward side and a middle phase is achieved, the interphase short circuit risk caused by manual operation errors is avoided, the safety of electric power operation is remarkably improved, meanwhile, the self-adaptive adjusting assembly automatically adjusts the height of the closing piece according to the wind direction, and the safety of electric power operation is improved. The closing time sequence is further optimized, and the harm of the arc to equipment and operators is reduced.

A degradation determination device determines whether each of a first opening / closing device and a fuse provided on a power path is in a degraded state. The power path has a positive electrode-side power line and a negative electrode-side power line. The first opening / closing device and the fuse are provided on the negative electrode-side power line. The degradation determination device is provided with a first potential detection unit that detects a first potential at one end of the first opening / closing device and a second potential at the opposite end thereof, a second potential detection unit that detects a first potential at one end of the fuse and a second potential at the opposite end thereof, and a control unit that determines whether each of the first opening / closing device and the fuse is in a degraded state, based on a potential difference between the first and second potentials.

The invention relates to the technical field of overcurrent protection, in particular to an active protection control method and system for power distribution switch control equipment, and the method comprises the following steps: a current sensing device obtains a current value sequence, a sliding window generates a current slope, impedance detection obtains an impedance sequence, and an impedance rate is obtained through least square; a correction coefficient is obtained through a difference value between an impedance rate and a reference value; a disturbance rate is calculated through a current extreme value; an input classifier outputs a control instruction; a threshold and instruction logic and operation are carried out; according to the method, the coupling relation between the current slope and the impedance rate is dynamically analyzed, a multi-dimensional parameter system is constructed, a dynamic adjustment threshold value of a composite judgment basis is established, disturbance and overload are distinguished, the reliability is enhanced by combining a classifier recognition mode and logic and operation, feedback closed-loop control is introduced, the non-linear load adaptability is improved, and the maloperation rate is reduced; the sensitivity is enhanced, and the safety margin is optimized.

The invention discloses a control method for under-voltage tripping and voltage detection closing for a low-voltage switch, and relates to the technical field of power distribution automation. The problems of function separation, low detection precision, poor anti-interference capability and inconvenient maintenance in the prior art are solved. The method comprises the following steps: S1, acquiring a high-precision digital voltage through a voltage transformer, a voltage division network, an isolation amplifier and a 24-bit delta sigma ADC; s2, interference is suppressed by combining temperature compensation, FIR filtering, median filtering and an oversampling integration algorithm; s3, comparing the real-time voltage with a tripping / closing threshold value which can be configured online in parallel; s4 / S5, triggering a zero-crossing short pulse to drive opening / closing based on the threshold value and the time delay; s6, performing parallel fault monitoring, shielding misoperation and uploading fault data; according to the invention, the detection precision, the anti-interference capability and the operation and maintenance efficiency of the system are obviously improved.

The invention discloses an automatic configuration method and system for a power supply loop, and relates to the technical field of intelligent power distribution. After a plug device is rotationally locked, an identity is read in a near field, and corresponding voltage and power templates are called; inputting the power template and bus real-time current into an edge algorithm to obtain residual capacity and generate an initial power distribution matrix; when the residual capacity is higher than a safety threshold value, a phase sequence, a breaking value and overcurrent delay are issued to the intelligent circuit breaker, and zero-voltage window spark-free closing is realized; during operation, load change is predicted, time dislocation and power coupling parameters are calculated, a peak regulation coefficient is obtained through fuzzy reasoning, and a non-critical load migration stabilizing peak value is triggered; and finally, synchronizing the identity, the power distribution matrix and peak regulation parameters to the digital twin model, and realizing self-learning, energy efficiency improvement and system stability improvement by means of a parallel simulation optimization rule and second-level multiplexing during similar access.

A thermosensitive wire includes a pair of conductive wires each covered with an insulator that softens at a preset temperature, and the pair of conductive wires are configured to come into contact with each other to be short-circuited in response to the insulator softening. A power supply system includes: a second power source configured to supply power to the pair of conductive wires; a short circuit detector configured to detect that the pair of conductive wires are short-circuited; a disconnection detector configured to detect that the pair of conductive wires are disconnected; and a controller configured to perform, for power supply to a power supply wire, abnormality control that differs between in the case where the short circuit detector detects that the pair of conductive wires are short-circuited and in the case where the disconnection detector detects that the pair of conductive wires are disconnected.

The invention discloses an energy storage converter and an overcurrent protection circuit and an overcurrent protection method thereof. The overcurrent protection method comprises the following steps: acquiring the equipment temperature and the output current and voltage of the energy storage converter; calculating a current change rate based on the acquired output current; the current real-time temperature is adjusted on the basis of the reference over-current protection threshold value, the voltage collected in real time is applied to the adjusted over-current protection threshold value according to the set proportion, and meanwhile, the current change rate obtained through real-time calculation is applied to the adjusted over-current protection threshold value according to the set proportion. Obtaining a result of a dynamic overcurrent protection threshold value; comparing the dynamic over-current protection threshold value with the output current of the energy storage converter, if the dynamic over-current protection threshold value is exceeded, triggering to execute a protection action, generating a control instruction, and tripping off a switch device for controlling the operation of the energy storage converter; and if not, continuously monitoring and comparing the output current with the dynamic overcurrent protection threshold.

The invention discloses integrated three-phase intelligent safe electric equipment, belongs to the technical field of safe electric utilization, and aims to solve the problems that when a fuse is installed and arranged, the position is inconvenient to adjust, when the fuse fails and the fuse cannot be normally fused due to overlarge current, a device is easily burnt to cause circuit fire, and a connecting contact is easily subjected to dust deposition and oxidation in the long-time use process, so that the service life of the fuse is prolonged. The device comprises a box body, vertical guide rails are symmetrically and fixedly connected in the box body, the side walls of the two vertical guide rails are jointly connected with a plurality of transverse rows in a sliding mode, and each transverse row is movably provided with a plurality of arrangement assemblies. According to the invention, through the arrangement of the arrangement assembly, position adjustment can be carried out without overall disassembly after the fuse is connected, through the arrangement of the protection mechanism and the cut-off mechanism, when the fuse breaks down and is not normally fused due to overlarge current, the melt part of the fuse is physically cut off, and through the arrangement of the driving mechanism and the maintenance mechanism, the safety of the fuse is improved. And the metal connecting part is maintained and protected, dust accumulation is reduced, and contact oxidation is slowed down.

The invention provides a probe power supply over-current protection circuit and an over-current protection method thereof, relates to the technical field of power electronics, and solves the problems that periodic instantaneous over-current and continuous fault over-current are difficult to accurately distinguish and a control signal and a protection system lack a linkage mechanism in the prior art. In the circuit, a current detection unit generates a single over-current trigger signal when detecting a single over-current event; the central control unit sends a blocking signal after receiving the single overcurrent trigger signal, and sends a reset signal after preset time delay; meanwhile, cumulative counting is carried out on single overcurrent trigger signals, and whether an overcurrent fault occurs or not is judged according to a preset threshold number of times; the output control unit is used for controlling the closing and resetting of a probe power supply under the action of different signals; and the state feedback unit feeds back state information to the main control system when an overcurrent fault occurs. According to the invention, accurate response to the ELM overcurrent of the Tokamak device and reliable blocking of persistent faults are realized.

The utility model discloses a photovoltaic inverter circuit, an inverter and a system, and the photovoltaic inverter circuit comprises a frequency conversion circuit; a multi-path short-circuit protection circuit; the multi-path boost circuit comprises at least two boost modules, each boost module comprises at least two boost circuits, and the output ends of all the boost modules are cascaded and connected with the input end of the frequency conversion circuit; the positive input end of each booster circuit is used for being connected with the positive electrode of a photovoltaic module, the negative input end of each booster circuit is connected with the negative electrode of the photovoltaic module through a short-circuit protection circuit, and the positive electrode connected with the positive input end of each booster circuit and the negative electrode connected with the negative input end of each booster circuit through the short-circuit protection circuit belong to the same photovoltaic module; wherein each short-circuit protection circuit is used for stopping outputting the current of the negative electrode of the connected photovoltaic module to the negative input end of the booster circuit. According to the technical scheme of the utility model, the inverter can be protected when the non-isolated string type photovoltaic inverter is short-circuited to the ground.

The invention belongs to the field of power distribution network automation, and discloses a controllable drop-type intelligent fuse and a control method thereof. The controllable drop-type intelligent fuse comprises a measurement and control module which is arranged at the lower part of a fusion tube and is used for measuring the working current of the fuse, the high voltage of a line, the temperature of a fuse wire, the poor contact state of the fusion tube and the drop state of the fusion tube through a sensor and a corresponding measurement circuit, and communicating with a background server through a wireless communication function; the measurement and control module is connected with a configured micro motor and a measurement and control module torque output rotating shaft; the lower contact is provided with a novel tensioning structure which is used for enabling the fuse to be controlled to fall off. On the basis of keeping the function of an original traditional drop-out fuse as a short-circuit protection switch, a measurement control and wireless communication circuit is added; working current, fuse wire temperature and drop state can be measured, drop of the fuse can be controlled automatically or wirelessly and remotely when primary current is larger than a set value, and therefore load overcurrent protection is achieved.

The utility model provides a short-circuit protection circuit for a Type-C interface, and belongs to the technical field of short-circuit protection circuits. Comprising an interface module, an overvoltage and electromagnetic protection circuit and a switching circuit, the interface module, the overvoltage and electromagnetic protection circuit and the switching circuit are connected in series on the same power line and grounding line, and a common circuit and a standby circuit are arranged in the switching circuit and are both connected with the power line. According to the utility model, through the cooperation of the resettable fuse, the double-pole double-throw relay and other elements, the circuit can be rapidly switched so as to ensure that the interface can continue to work normally without maintenance when a short-circuit fault occurs, and through the synergistic effect of the gas discharge tube, the first transient suppression diode, the second transient suppression diode, the electrolytic capacitor and other elements, the short-circuit fault of the interface can be effectively prevented. The problems of overvoltage and electromagnetic interference during short circuit can be effectively relieved.

The embodiment of the utility model provides a protection circuit and a protection circuit system, comprising a first resistor, the first end of which is connected with the power supply input end of the protection circuit; the first end of the first control circuit is connected with the power supply input end, and the second end of the first control circuit is connected with the second end of the first resistor; the first end of the first control switch is connected with the third end of the first control circuit, the second end of the first control switch is connected with the second end of the first resistor, and the third end of the first control switch is connected with the power output end of the protection circuit; the first end of the second control circuit is connected with the power input end, the second end of the second control circuit is connected with the first end of the first control switch, and the third end, the fourth end and the fifth end of the second control circuit are grounded. The problem of equipment damage caused by long response time of the protection circuit can be solved, and the effect of reducing the response time of the protection circuit and further protecting the equipment is achieved.

The invention belongs to the technical field of soft starter control, and particularly provides a soft starter control method and system based on dynamic threshold correction and current change prediction, and the method comprises the steps: data collection: collecting the collected data, including the environment temperature, the input current collection and the operation duration of a soft starter; data cleaning and preprocessing; establishing a temperature-time-current threshold correction relation; a soft starter state classification model is constructed based on the long-short-term memory network and used for perfecting the temperature-time-current threshold correction relation constructed in the third step and outputting the soft starter state; soft starter state classification model training optimization and evaluation; and using the trained soft starter state classification model to carry out soft starter operation state discrimination. The method and the system are combined with multi-dimensional data such as temperature and time, a current protection threshold is dynamically adjusted, and the problem that a traditional static constant value is poor in adaptability is solved.

The invention discloses a high-side driving circuit, an electronic device, a vehicle and a control method. False triggering of a short-circuit protection mechanism is avoided. The high-side driving circuit comprises a power distribution circuit, a sampling circuit and a fault protection circuit, the power distribution circuit comprises a PMOS transistor and a first resistance circuit; the grid electrode of the PMOS tube is grounded through the first resistance circuit, the drain electrode of the PMOS tube is connected with a load, and the source electrode of the PMOS tube and the input end of the fault protection circuit are connected with a power supply; the output end of the fault protection circuit is connected with the grid electrode of the PMOS tube; the sampling circuit is connected with the drain electrode of the PMOS tube and the ground; the output end of the sampling circuit and the control end of the fault protection circuit are connected to the control unit; the control unit judges whether load short circuit occurs or not according to the sampling voltage, if not, the fault protection circuit is forbidden to output voltage, and if yes, the fault protection circuit is controlled to convert input voltage into target voltage to be output; the PMOS tube is in a variable resistance region when the fault protection circuit has no voltage output, and enters a cut-off region when the PMOS tube outputs a target voltage.

The invention relates to a switch-off unit (1, 1.1, 1.2, 1.3, 1.4, 1.5) for an electric charging device (3, 25, 27) with a switch-off arrangement (5, 5.1, 5.2, 5.3, 5.4, 5.5) having a first controllable power semiconductor component (9, 9.1) and a second controllable power semiconductor component (9, 9.2), and a switch-off control device (7), whereinthe first power semiconductor component (9, 9.1) and the second power semiconductor component (9, 9.2) are arranged antiserially, whereinthe first power semiconductor component (9, 9.1) and the second power semiconductor component (9, 9.2) are configured to conduct a charging current of the charging device (3, 25, 27) in a switched-on state, whereinthe switch-off control device (7) is operatively connected to the first power semiconductor component (9, 9.1) and the second power semiconductor component (9, 9.2) and is configured for their respective control, whereinthe switch-off control device (7) is configured to acquire a value of at least one charging parameter which is characteristic of the charging current, andin dependence on the acquired value, to switch off the first power semiconductor component (9, 9.1) and / or the second power semiconductor component (9, 9.2) and thereby interrupt the charging current.

The embodiment of the invention provides a power driving circuit, and relates to the technical field of vehicles. The device is suitable for the technical field of various new energy vehicles such as electric vehicles, hybrid power vehicles and fuel cell vehicles. The circuit comprises a power supply, a sampling resistor, an MOS tube, a current monitoring unit, a comparator, a triode and a micro-control unit. The power supply is connected with the MOS tube through the sampling resistor, and the MOS tube is used for being connected with a power load; the sampling resistor is connected with a first signal input end of the micro-control unit through the current monitoring unit, and a second signal input end of the micro-control unit is connected with an output end of the MOS tube; the output end of the current monitoring unit is connected with the input end of the comparator, the output end of the comparator is connected with the input end of the triode, and the output end of the triode is connected with the MOS tube. The method provided by the invention effectively solves the problems that the cost of power driving power is relatively high and the protection requirement of the domain control device cannot be met in the prior art.