831 results about "High impedance" patented technology

A headset antenna and a connector for the same are provided. The headset antenna includes an audio signal line, an antenna and a high impedance element in specified application frequency ranges. The audio signal line is adapted for transmitting an audio signal and the antenna is adapted for receiving an RF signal. The high impedance element is disposed on a transmission path of the audio signal and generates a high impedance at a specified frequency band of the RF signal, so that the audio signal line is equivalent to an open circuit and the antenna obtains a better receiving capability.

A high-impedance fault positioning method and system based on synchronous Lissajous curve characteristics are provided. The method includes: acquiring a bus zero-sequence differential voltage and a feeder zero-sequence current of a faulty line; constructing a first Lissajous curve in a characteristic frequency band range based on the bus zero-sequence differential voltage and the feeder zero-sequence current; when the proportion of the faulty line is less than a set threshold value and the slope of the first Lissajous curve is negative, determining that high-impedance faults have occurred in the faulty line; constructing a second Lissajous curve based on the bus zero-sequence differential voltage and the section zero-sequence current, performing linear fitting on discrete data points of the second Lissajous curve to obtain a fitted curve; and when the slope of the fitted curve is negative for at least three consecutive periods, determining that high-impedance faults have occurred in the section.

A passivity-based dual-mode integrated control method for a grid-connected inverter (GCI) is provided. In view of the insufficient robustness of the conventional single-mode GCI in a high-impedance and low-inertia weak grid, and the problem of wideband oscillation of the grid voltage and grid current or even system instability in nonlinear application scenarios such as grid structure / parameter variation, and plug-and-play of the inverter, the dual-mode integrated control method performs modeling on the GCI based on a port-controlled Hamiltonian (PCH) model, thereby obtaining integrated control with a weighted passivity-based feedback control law for the GCI based on a grid-following (GFL) mode and a grid-forming (GFM) mode. Based on the dual-mode integrated control method, the stable operation of the GCI in severe grid conditions with large fluctuation of the impedance, and desirable robustness of the GCI in nonlinear working scenarios can be ensured.

An audio cable connector with selectable impedance includes low impedance interface circuitry and high impedance interface circuitry, and a user-operable switch to allow a user to select either of the two impedances to connect to a headset microphone. With the audio cable connector in communication between a headset and equipment, the user may select the appropriate impedance interface circuitry to allow the headset to operate properly with the equipment.

The invention relates to the technical field of non-electrical variable control or regulation systems, and discloses a temperature rising blanket temperature closed-loop control method and system based on human body position recognition feedback, and the method comprises the steps: calculating a form compactness coefficient representing a heat dissipation boundary based on pressure data, and calling a mapping function to convert the form compactness coefficient into an equivalent thermal impedance estimated value; introducing the estimated value and dynamically constraining the forward channel gain of the temperature closed-loop controller according to a negative correlation strategy; according to the method, a real-time mapping mechanism of the contact topological characteristics and the control gain is constructed, so that the problem of model mismatch caused by body position change of the controlled object is solved; when the high-impedance contact state is detected, energy input is automatically reduced, the local heat accumulation effect is restrained, and the convergence and safety of the thermodynamic control process under the variable boundary condition are ensured.

The invention discloses an autonomous voltage support method and device for a network-constructed converter and a medium, and the method comprises the steps: constructing a converter network-constructed control topological structure, determining a droop control output frequency and a droop control output voltage amplitude according to the topological structure, obtaining the resistance and inductance of a power grid, and the voltage and current of a PCC point, and carrying out the control of the droop control output frequency and the droop control output voltage amplitude. The droop control output frequency and the droop control output voltage amplitude are combined to obtain droop control positive and negative sequence active / reactive reference power, so that an autonomous voltage support strategy is generated to carry out coordinated adjustment of a voltage outer loop / current inner loop, and the real-time impedance measurement is combined with reference power calculation based on autonomous voltage support to obtain the real-time impedance of the droop control output frequency and the droop control output voltage amplitude. According to the invention, accurate voltage support and power adjustment of the grid-forming converter in the weak power grid can be realized, the correctness of the support method is improved, the support capability of the grid-forming converter can be obviously improved, and the power quality and the power supply reliability of the grid-forming converter in the weak power grid with low short circuit ratio and high impedance can be improved.

The invention belongs to the technical field of new energy active support stability control, and provides a fan power decoupling method based on adaptive virtual impedance and feedforward compensation. According to the method, dynamic characteristics of active power and reactive power in the system are analyzed by combining a topological structure of a doubly-fed fan grid-connected system and fan internal control, and a small signal model is constructed based on power transmission characteristics. A self-adaptive virtual impedance strategy based on power grid impedance characteristic adjustment is introduced for the problem of power coupling caused by high line impedance in a weak power grid environment and dynamic and control loop characteristics of flux linkages in a fan. Meanwhile, through a disturbance component extraction and feedforward control strategy, a disturbance signal in rotor current is introduced into a power ring for adjustment, and power decoupling control is realized. The method overcomes the limitation that an existing decoupling control technology is poor in effect, the control principle is clear, engineering implementation is easy, and the stability and the dynamic response capability of the doubly-fed fan in the weak power grid environment can be improved.

The invention discloses a positive electrode material, the positive electrode material is a lithium-nickel-cobalt composite oxide, the positive electrode material comprises secondary particles, the secondary particles comprise a plurality of primary particles, the positive electrode material has a primary particle microcrystalline coefficient P, and the microcrystalline coefficient P is more than or equal to 20000 and less than or equal to 100000. According to the single crystal material provided by the invention, the number of microcrystals in the primary particles is increased, so that the ionic conductivity of the material is enhanced, and the problems of high impedance, low capacity and the like of large-particle single crystals are solved.

In one implementation, an apparatus, such as an ESD protection circuit, is disclosed. The apparatus can include a filter coupled between a local supply voltage rail to a supply voltage rail. A switch circuit can be connected in parallel with the filter. The apparatus can include a clamp configured to 1) provide a first ESD shunt path from an input line to the local supply voltage rail and 2) provide a second ESD shunt path from the input line to a lower voltage rail. A second clamp can be configured to provide a third ESD shunt path from the local supply voltage rail to the lower voltage rail. The switch circuit can be configured to close a switch to bypass the filter.

The invention provides an adaptive stochastic resonance weak fault detection method based on kurtosis optimization, and belongs to the technical field of fault detection, and the method comprises the steps: collecting and preprocessing a transient signal on a cable line; constructing a bistable stochastic resonance model; kurtosis of the output signal is used as a fitness function, and potential well parameters of the bistable stochastic resonance model are optimized based on a particle swarm optimization algorithm; and substituting the optimized potential well parameter into the bistable stochastic resonance model, and processing the preprocessed transient signal to obtain an enhanced output signal for fault detection. The method has the beneficial effects that the stochastic resonance system is constructed on the basis of the classical bistable model, the kurtosis of the output signal is used as the fitness function of the particle swarm optimization algorithm, the potential well parameters are adaptively optimized, the potential well parameters are driven to automatically converge to the optimal state, and the robustness of the system is improved. The high-impedance grounding fault traveling wave signal can be extracted and enhanced from a strong noise background, and the detection sensitivity and reliability are improved.

The invention belongs to the technical field of electrical equipment fault monitoring, and discloses a fault monitoring system for electromechanical installation engineering, which comprises a high-impedance fault identification module, extracts nonlinear harmonic features through current signals, constructs a frequency domain-time domain joint feature set in combination with space-time magnetic distortion in an electromechanical installation process, and performs fault identification on the nonlinear harmonic features through the high-impedance fault identification module. Non-linear characteristic response identification of the high-impedance fault is carried out, and a high-impedance fault characterization result is output; the transient fault capturing module is used for positioning a risk time window according to a high-impedance fault characterization result, and identifying the starting and ending boundaries of an electrical disturbance behavior in combination with a double-threshold mutation mechanism; synchronously extracting corresponding operation condition parameters, constructing a short-time process behavior model taking electrical disturbance as a source, and outputting a transient disturbance sequence; and the sensitivity of fault identification, the accuracy of positioning and the real-time performance of diagnosis are integrally improved.

The invention belongs to the technical field of electromagnetic wave absorption, and particularly discloses a three-dimensional structure wave-absorbing metamaterial which comprises a first three-dimensional structure layer, a second three-dimensional structure layer and a metal backboard which are sequentially arranged from top to bottom, the first three-dimensional structure layer comprises a first top layer and a first three-dimensional absorption enhancing framework arranged on the lower surface of the first top layer, and the second three-dimensional structure layer comprises a second top layer and a second three-dimensional absorption enhancing framework arranged on the lower surface of the second top layer. A first high-impedance metasurface and a second high-impedance metasurface are loaded on the lower surface of the first three-dimensional absorption enhancement skeleton at intervals; the second three-dimensional structure layer comprises a second top layer and a second three-dimensional absorption enhancement skeleton arranged on the lower surface of the second top layer, and a third high-impedance metasurface is loaded on the top surface of the second top layer. By adopting the three-dimensional structure wave-absorbing metamaterial, ultra-wideband absorption and large-angle stability can be achieved under the condition that the thickness is small, light and thin wideband application of a wave-absorbing body is facilitated, and the three-dimensional structure wave-absorbing metamaterial has great practical value in the field of electromagnetic compatibility.

The invention relates to the technical field of cable fault range finder management optimization, in particular to a cable fault range finder management optimization system, which comprises a noise suppression and signal enhancement optimization module used for performing signal enhancement on a target signal and performing signal suppression on a noise signal; the high-impedance fault detection optimization module is used for constructing a high-impedance fault point positioning model to finish accurate positioning of a fault point; and the fault range finder intelligent management module is used for completing self-adaptive matching between the cable fault range finder and the environment according to the comprehensive performance score. According to the method, empirical mode decomposition is carried out on cable signal data, adaptive adjustment of a signal-to-noise ratio is combined, a target signal and a noise signal are accurately identified, and enhancement of the target signal and suppression of the noise signal are completed by using a dynamic gain coefficient; by performing time-frequency decomposition on an enhanced signal, constructing a feature vector and establishing a high-impedance fault point positioning model based on a machine learning algorithm, accurate detection and positioning of a fault point are realized.

The invention discloses a micro-channel plate manufacturing method, which comprises the following steps of: bombarding a processing sample through heavy ions to form a plurality of micro-channels on the processing sample; cleaning the path of the micro-channel, and expanding the aperture of the micro-channel; performing high-impedance treatment on the inner wall of the micro-channel to form a high-impedance inner wall; on the basis of the steps, the high-energy heavy ions generated by the high-energy accelerator are used for bombarding the glass sample with set parameters to manufacture the micro-channel plate, so that the tedious manufacturing processes of manufacturing a capillary glass tube and machining and shaping are omitted; the production efficiency is improved, the manufacturing time is shortened, and the production cost is reduced. The technical problem that much inconvenience is brought to production, processing and use due to the fact that micro-channel plates in the market are prone to deformation and even damage in the production process is solved.

The present invention discloses a dual-mode fusion control method for a grid-connected inverter based on passivity, and belongs to the field of electrical engineering. The present invention includes a traditional single-mode operation grid-connected inverter, which is not robust enough under weak grid conditions with high impedance and low inertia, and faces nonlinear application scenarios such as grid structure / parameter changes and inverter plug-and-play, which will cause broadband oscillations in the grid-connected voltage and current, and even cause system instability. The present invention proposes to model the grid-connected inverter based on a port-controlled Hamiltonian model, and obtain a weighted fusion control based on the passive feedback control law of the grid-connected inverter operating in the following grid and the grid-building mode. Based on the control of the dual-mode fusion control method, the grid-connected inverter can be guaranteed to operate stably under harsh grid conditions with large impedance fluctuations, and at the same time have good robustness in nonlinear working scenarios.

The invention relates to an electromagnetic shielding film and a circuit board, and the electromagnetic shielding film comprises a shielding layer, the thickness d of the shielding layer in a slicing state and in a preset observation range satisfies # imgabs0 #, the thickness uniformity of the shielding layer is less than or equal to 20% through the modes of adjusting a production technology and the like, the shielding layer with uniform thickness is formed, the consistency of impedance characteristics can be improved, and the electromagnetic shielding film has good electromagnetic shielding performance. And meanwhile, the skin effect of the shielding layer is reduced, the surface current is better borne, the influence of electromagnetic interference of a high-frequency and high-speed line on an internal circuit is reduced, the shielding effect of the electromagnetic shielding film on the high-frequency and high-speed line is improved, and the working reliability of the circuit board is further improved. Besides, the first protection layer forms an undulating surface through the particle member, and the shielding layer conformal to the undulating surface of the first protection layer can be grounded with the circuit board by using a downward projection, so that non-conductive particle grounding is realized, more use scenes are satisfied, and the material applicability is improved.

The invention discloses a power distribution network fault type identification method based on big data, and relates to the technical field of power distribution network fault type identification. Multi-source data time axes are aligned on the premise of keeping original sampling precision through clock drift correction and a self-adaptive interpolation algorithm; the problem of misjudgment faults or missed judgment faults caused by asynchronous voltage / current signal time is thoroughly eliminated; low confidence is marked for communication delay data, participation in calculation is limited, and noise interference feature extraction is avoided; on the basis of a fault type association mechanism of a misjudgment sample, a network layer needing to be adjusted is accurately positioned, and resource overhead of full-model retraining is avoided; the scarce fault data is expanded by combining an adversarial sample generation technology, and the recognition robustness of complex scenes such as high-impedance grounding is improved.

The invention discloses a sensor array acquisition system for detecting gas, and relates to the field of gas sensors. The sensor array acquisition system for detecting gas comprises a gas sensor array, a signal conditioning circuit, an analog-to-digital conversion module, a control module and a power supply module. According to the sensor array acquisition system for detecting the gas, the voltage follower circuit with high input impedance is adopted, so that the problem of attenuation during signal acquisition of a high-impedance sensor is effectively solved, and the signal acquisition precision is improved. Through the adjustable direct-current bias circuit and the differential amplification circuit, the dynamic adjustment of the measurement range is realized, the gas detection requirements of different concentration ranges can be met, and hardware does not need to be replaced. A constant-current driving chip is adopted to control a sensor heating circuit, heating current can be accurately set by adjusting external resistance, it is ensured that the sensor works at the optimal temperature, and the stability and response speed of the sensor are improved.

An acoustic matching structure is used to increase the power radiated from a transducing element with a higher impedance into a surrounding acoustic medium with a lower acoustic impedance. The acoustic matching structure consists of a thin, substantially planar cavity bounded by a two end walls and a side wall. The end walls of the cavity are formed by a blocking plate wall and a transducing element wall separated by a short distance (less than one quarter of the wavelength of acoustic waves in the surrounding medium at the operating frequency). The end walls and side wall bound a cavity with diameter approximately equal to half of the wavelength of acoustic waves in the surrounding medium. In operation, a transducing element generates acoustic oscillations in the fluid in the cavity. The transducing element may be an actuator which generates motion of an end wall in a direction perpendicular to the plane of the cavity to excite acoustic oscillations in the fluid in the cavity, and the cavity geometry and resonant amplification increase the amplitude of the resulting pressure oscillation. The cavity side wall or end walls contain at least one aperture positioned away from the center of the cavity to allow pressure waves to propagate into the surrounding acoustic medium.

The invention relates to the technical field of radio frequency integrated circuits, in particular to a harmonic suppression power amplifier combining a matching network and a feed network, which comprises a transistor, an input matching module, an output matching module, a stabilizing module and a bias module, the input matching module comprises a first parallel resonance unit, the first parallel resonance unit is used for second harmonic suppression, the output matching module comprises a series resonance unit and a second parallel resonance unit, the series resonance unit is used for resonating at a second harmonic frequency and performing low-impedance grounding on the second harmonic, and the second parallel resonance unit is used for resonating at a second harmonic frequency and performing low-impedance grounding on the second harmonic. The second parallel resonance unit is used for resonating at a third harmonic frequency and forms a high-impedance open circuit for the third harmonic, the output matching module is coupled to a drain electrode of the transistor, and the bias module comprises a grid bias sub-module and a drain bias sub-module. The grid bias sub-module is coupled to a connection node of the input matching module and the grid of the transistor, the drain bias sub-module is coupled to the output matching module, and the bias voltage of the transistor is jointly determined by the grid bias sub-module and the drain bias sub-module. The power amplifier has the effect of improving the efficiency level of the power amplifier while realizing harmonic suppression optimization.

The invention discloses a peak code modulation circuit based on a dynamic memristor, which comprises the dynamic memristor and a signal conversion module, and is characterized in that the signal conversion module comprises a signal isolation module, a feature extraction module and a pulse conversion module which are connected in sequence. The dynamic memristor generates a voltage signal with a slow-rising and steep-falling characteristic under constant current input. The signal isolation module comprises a high-impedance input buffer circuit; the feature extraction module comprises an asymmetric time constant signal processing circuit used for performing enhanced extraction on the steep drop feature of the memristor output signal; and the pulse conversion module comprises a dual-threshold positive feedback hysteresis comparison circuit and is used for converting the output signal of the feature extraction module into a rectangular digital pulse. The circuit is specially designed according to the characteristics of the memristor, is simple in structure, is easy to integrate, can achieve the efficient conversion from an analog signal to a standard digital pulse, and is suitable for the fields of neuromorphic calculation and low-power-consumption signal processing.

The invention discloses an anti-interference ultra-wideband radiation unit and an anti-interference ultra-wideband antenna, and the radiation unit comprises a light guide sheet which is located above a radiation surface and is used for expanding the bandwidth; the radiating surface consists of four folded dipole radiating arms and is printed on a first substrate of which the dielectric constant is 4.4, the loss tangent is 0.005 and the thickness is 0.762 mm, and every two folded dipole radiating arms are connected together through a high-impedance lead; the balun comprises an inductance circuit and a capacitance circuit on the front surface and the back surface, the inductance circuit is arranged in a bending manner and is electrically conducted through a metalized via hole, the capacitance circuit performs energy coupling through a gap of the substrate thickness to form a gap capacitor, and the balun is connected with each folded dipole radiation arm and is used for providing broadband impedance matching; and the base is connected with the balun and is used for converting the feed type, so that the coaxial cable is welded in parallel to the base, the electromagnetic interference between different frequency bands can be effectively reduced, and the gain can be improved.

The utility model relates to a power supply device and a testing machine, the power supply device comprises a main loop, a voltage loop, a current loop and a clamping circuit, in a pressurization mode, when a detection current output by the clamping circuit at the current loop is in a set current clamping range, the output impedance is high resistance; and when the detection current output by the current loop is not in a set current clamping range, the clamping circuit triggers the clamping current to carry out analog output, and the output impedance is switched to low resistance, so that the output of the main loop is equivalent to a constant current source. In the current adding mode, when the detection voltage output by the clamping circuit at the voltage loop is within a set voltage clamping range, the output impedance is high resistance; and when the detection voltage output by the voltage loop is not in a set voltage clamping range, the clamping circuit triggers the clamping voltage to perform analog output, and the output impedance is switched to low resistance, so that the output of the main loop is equivalent to a constant voltage source. The simulation regulation function is achieved, and the response speed is high.

The invention relates to a heat-resistant high-impedance BM photoresist based on copolymer grafted modified carbon black and a preparation method thereof, and belongs to the technical field of photoresist materials. Carbon black is subjected to oxidation modification, a chlorinating agent is added to chloridize oxidized carbon black, and active controllable free radicals are introduced to the surface of chlorinated carbon black, so that a copolymer is grafted to the surface of the carbon black; and finally, the acrylic acid-co-imide grafted copolymer surface modified carbon black or methacrylic acid-co-imide grafted copolymer surface modified carbon black with strong heat resistance is obtained. The high-impedance BM photoresist prepared from the modified carbon black can provide relatively strong static electricity and space stabilization effects, and the dispersion stability of the carbon black in resin is also improved; in addition, the copolymer is grafted with a polyimide chain, so that the copolymer has strong temperature resistance and corrosion resistance. By using the graft copolymer surface-modified carbon black, a high-impedance BM photoresist having a high OD value, high insulativity, excellent heat resistance, and high-fineness pattern linearity can be obtained.

The utility model discloses an ESD (Electro-Static Discharge) device with an impedance matching function, which relates to the technical field of ESD device packaging and comprises a product crystal grain. The frame electrode plate is arranged at the upper end of the product crystal grain; the left electrode plate is connected with the frame electrode plate; the right electrode plate is arranged at the lower end of the product crystal grain; one end of the impedance part is connected to the left electrode plate, and the other end of the impedance part is connected to the right electrode plate; and the packaging part completely seals the product crystal grains, the frame electrode plate and the impedance part, and partially seals the left electrode plate and the right electrode plate. The impedance part is used for enhancing the impedance on the left electrode plate and the right electrode plate, and one impedance part can improve the impedance on the left electrode plate and the right electrode plate at the same time, so that the ESD device in a unit space can have higher impedance.

The invention relates to the technical field of lithium ion batteries, in particular to a halogenated electrolyte modified low-impedance positive electrode and a preparation process and application thereof. The problem that an existing lithium ion battery positive electrode material is high in impedance is solved. According to the preparation method, the carbon-coated aluminum foil is used as the positive current collector, so that the positive current collector has relatively low contact resistance and relatively high adhesion, the charge transfer resistance and the internal resistance of the battery are reduced, and the rate capability and the cycle performance of the battery are improved; a positive active material is added, C6H12O6.H2O is adopted for carbon coating to improve the electron transmission capacity of lithium iron phosphate, titanium-vanadium co-doping synergistically improves the electron conductivity, and the electron conduction impedance is reduced; the halide solid electrolyte coats lithium iron phosphate to inhibit side reaction and reduce interface impedance; carbon nano tube coating inhibits particle aggregation and reduces charge transfer impedance; and the modified conductive agent and the modified binder are added, so that the lithium ion battery has higher cycling stability, electrochemical activity and lower impedance.

The invention provides a two-stage current intensity adjusting method for an eye therapeutic apparatus, and the method comprises the steps: extracting the impedance effect intensity of a current at a macular center through recognizing the thickness of an impedance barrier layer corresponding to the current limiting degree of a high-impedance region, and combining with the actual penetration thickness, and obtaining the current penetration depth reduction proportion of the current penetration depth at the macular center; the current intensity imbalance degree of the coarse adjustment basic current intensity in the transition subarea is evaluated, and by obtaining the current intensity increase and decrease multiple of the fine adjustment compensation current intensity, the gradient difference between high impedance limitation and low impedance permeation is integrated, and the current intensity is compensated to balance the current intensity imbalance degree of the transition subarea; and updating the current output power level of each partition according to the fine adjustment compensation current intensity, and feeding back the current output power level to a therapeutic instrument circuit in real time to obtain uniform therapeutic intensity distribution so as to be matched with the decreasing proportion of impedance of impedance gradient distribution from high to low.

The invention relates to a rail transit vibration energy recovery device and method based on a piezoelectric device, and the method comprises the following steps: installing a piezoelectric vibrator power generation structure at a rail position such as a steel rail or a ballast bed, transmitting the vibration energy generated by wheel track excitation to the power generation structure when a train passes, and enabling the power generation structure to generate electric energy due to vibration; the piezoelectric material converts mechanical energy into small-current and high-impedance electric energy, and a rectifying circuit is additionally arranged between the piezoelectric element and the load to convert alternating voltage into direct voltage. The piezoelectric ceramics generate instantaneous charges when bearing mechanical stress, and the voltage stabilizing circuit carries out voltage stabilizing and constant current processing. The electric energy after rectification and voltage stabilization processing is stored in an energy storage element through a storage circuit, so that the electric energy can be conveniently used by electric appliances. Compared with the prior art, the method is convenient to install and use, the circuit is simple and easy to understand, operability is high, efficient electric energy conversion can be achieved, and the device is an ideal rail transit vibration energy recovery and conversion device.

A system and method for detecting high impedance faults (HIFs) in an electrical distribution system may include obtaining a first current signal of a first electrical conductor, determining, based on a time period, a first moving window for the first current signal and a second moving window for a second current signal, determining a first instantaneous phase of the first moving window and a second instantaneous phase of the second moving window, determining a first frequency spectrum and a second frequency spectrum based on the first instantaneous phase and second instantaneous phase respectively, determining an error spectrum corresponding to a difference between points of the first frequency spectrum and the second frequency spectrum respectively, generating an error index based on the error spectrum, and identifying a trigger event at the first electrical conductor based on a comparison between the error index and a reference threshold.

The invention discloses an electric power system transient stability rapid response control method and system, and relates to the technical field of electric power systems, and the method comprises the steps: collecting a transient harmonic current signal generated by a power grid fault in real time through a harmonic detection unit connected to a DC bus of an energy storage converter, and calculating the phase offset of the transient harmonic current signal; generating a power control instruction through a pre-configured hardware mapping circuit based on the phase offset; acquiring a current differential signal by using a power grid line current sensor, and identifying a path of transient energy flowing to a key unit based on a power grid topological structure; for the path, dynamically forming a virtual high-impedance wall on the target line; and on a consumption path predefined according to the power grid topological structure, controlling the energy storage converter to operate in a current source mode and configuring a reverse power characteristic so as to absorb the energy flow turned by the virtual high-impedance wall.