86results about How to "Improve electricity quality" patented technology

The invention discloses a pure inorganic acid formation process for a positive electrode foil for a high-voltage bolt type aluminium electrolytic capacitor. The pure inorganic acid formation process is characterized by comprising the steps of dipping an etched foil into water for performing a dipping treatment to generate a hydrate film on the surface of the etched aluminium foil, then putting the etched aluminum foil, after the aluminum foil is subjected to the dipping treatment, into a dicarboxylic acid solution for further performing the dipping treatment, next putting the aluminum foil into a phosphate solution for performing a first time of formation to generate a dielectric oxide film on the surface of the aluminium foil; and then performing a second time of boric acid formation, and performing a roasting treatment and a phosphoric acid treatment to obtain the final positive electrode aluminium foil. According to the pure inorganic acid formation process for the positive electrode foil for the high-voltage bolt type aluminium electrolytic capacitor, the produced positive electrode foil is better in of electric property, low in current leakage, and high in hydration resistance, so that the formation process can particularly satisfy the high-quality demand of the high-voltage bolt type aluminium electrolytic capacitor; the service life of the high-voltage bolt type aluminium electrolytic capacitor can be prolonged, and the market competitiveness of the product is further enhanced; and in addition, experiments prove that the current leakage can be reduced by more than 28% by the formation process, and the service life of the aluminium electrolytic capacitor is improved by more than 1700 hours proved by an accelerated life test.

A zero power consumption green power supply synthesized power distribution control box has the functions of thunder prevention, electric leakage protection, electric energy display, programmable switch timing, wireless remote control and human body Doppler inductive control. After the load of electric equipment exceeds a set value and the electric equipment is powered off, a socket blacks out automatically, as a result, no energy is consumed when the electric equipment is in a standby state, and the effect of zero power consumption in a static state is achieved. A magnetic latching relay, an electronic shunt release, a high-efficiency lithium battery and a low-power dissipation device are used, and the lithium battery can maintain true energy-saving operation of the electric equipment when the electric equipment is in a standby state. Meanwhile, the zero power consumption green power supply synthesized power distribution control box has a short circuit function and an overload protection function; each distribution line has independent switching on / off functions, and the whole control box has general switching on / off functions to ensure equipment safety. The zero power consumption green power supply synthesized power distribution control box has extremely high practicability and can replace an existing source distribution cabinet in a family or an office, and a user can increase or decrease the number of switch control lines according to the demands of the user.

The invention relates to an integrated passive device wafer-level packaging three-dimensional stacked structure and a manufacturing method. The integrated passive device wafer-level packaging three-dimensional stacked structure comprises a wafer-level packaging chip and an IPD chip. The IPD chip comprises a glass substrate, wherein an IPD device and a metal wiring layer are arranged on the front surface of the glass substrate, the back surface of the glass substrate is etched to form TGV holes, back surface metal wiring layers are arranged on the back surface of the glass substrate and the inner surfaces of the TGV holes, a welding ball is arranged on a welding pad of each back surface metal wiring layer, and the welding balls are connected with a PCB. The manufacturing method of the three-dimensional stacked structure comprises the following steps that (1) the wafer-level packaging chip and the IPD chip of the glass substrate are stacked; (2) the back surface of the IPD chip is etched to form the TGV holes, the back surface metal wiring layer is manufactured on the back surface of the glass substrate; (3) the back surface metal wiring layer is etched into two insulated parts; the welding pads and welding balls are manufactured on the two parts of the back surface metal wiring layer, and the welding balls are connected with the PCB. By means of the integrated passive device wafer-level packaging three-dimensional stacked structure and the manufacturing method, short-distance interconnection between the chip and the IPD device is achieved, and the electric quality is improved.

The invention relates to an Internet-of-Things smart home based customized household electricity utilization planning system and method. The system comprises at least one custom-made household electricity utilization planning system, an electric power company platform, at least one central control machine and at least one electric device. Each custom-made household electricity utilization planning system makes a household electricity utilization plan by utilizing a step tariff scheme provided by an electric power company and sends the household electricity utilization plan to the electric power company platform; the electric power company utilizes the household electricity utilization plan to plan budgets of load distribution of electricity utilization lines as a whole, regulates the load distribution of the electricity utilization lines in real time and sends the household electricity utilization plan to the central control machines; each central control machine is used for executing the household electricity utilization plan, monitoring running time and power of each electric device timely, monitoring electricity utilization information of each electric device in real time and sends the electricity utilization information of each electric device to the electric power company platform and the custom-made household electricity utilization planning systems. Resource consumption of the environment is reduced, customers are promoted to save electricity and utilize electricity intelligently, and electricity utilization quality of the lines is improved.

The invention discloses an electric automobile frequency modulation optimizing control method based on charge state detection. The method comprises the steps that real-time electricity price data and frequency modulation price data of an electric distribution network are obtained; charging load characteristic data of an electric automobile and an SOC curve of the electric automobile are obtained during a charging stage; an electric automobile charging cost model is established by taking the SOC curve of the electric automobile as a constraint condition; a frequency modulation earning model with the electric automobile participating in frequency modulation is established; a user final earning model is established by combining the charging cost model of the electric automobile and the frequency modulation earning model, and an optimal solution of the user final earning model is solved according to the real-time electricity price data and the frequency modulation price data of the electric distribution network; a charging strategy with the electric automobile participating in frequency modulation and an execution controlling the charging strategy are obtained according to the model optimal solution. According to the electric automobile frequency modulation optimizing control method based on the charge state detection, travel demands of a user are met, and charging in the charging stage and the frequency modulation stage of the electric automobile are reasonably distributed, the user can obtain biggest earnings, and the service life loss cost of a battery is effectively reduced.

The invention discloses a capacitance boundary-based single-end all-line quick-action protection method of a power distribution line. By the capacitance boundary-based single-end all-line quick-action protection method, internal and external in-phase faults of the power distribution line can be rapidly and reliably identified, and relatively high transition resistance capability is achieved. A parallel capacitor at each bus of the power distribution line is used as a boundary component for steady-state distribution compensation and transient-state fault identification, a fault transient-state voltage characteristic is limited in a fault line by a reflection effect of the capacitor on a step fault travelling wave, the transient-state energy difference of a voltage time domain during the internal and external faults is analyzed and extracted by a small wave, and the configuration of an all-line quick-action protection scheme is achieved by comprehensively considering current amplitude characteristic before and after the faults. By the capacitance boundary-based single-end all-line quick-action protection method, current weak protection configuration of the power distribution line is favorably improved, and a protection foundation is provided for a power distribution system containing a large amount of distributed power supplies.

The invention discloses a method and a device for realizing remote control command transmission in an automatic power distribution system. The method includes steps of S1, acquiring a first present time of the automatic power distribution system and forming ASDU (application service data unit) carrying a timestamp so as to generate pre-transmission remote control message; S2, receiving a message sent by the master station or substation by a terminal and acquiring a second time of the automatic power distribution system; S3, judging whether the message comprises the ASDU carrying the timestamp or not, if yes, going the S4, if not, stopping at the S3; S4, acquiring the contents of the timestamp in the ASDU so as to restore the first time; and S5, judging whether the difference of the first time and the second time is smaller than a preset interval or not, if yes, the terminal executes the remote control commands, or the terminal refuses to execute the remote control commands. By adding timestamps into the remote control commands and judging whether the remote control commands are time out or not in transmission when the terminal receives the remote control commands, specific operation to time-out remote control command by the terminal is avoided, safety of the power grid is guaranteed and power utilization quality is improved.

The invention discloses a data security management method of a power business terminal. The method comprises the step of building a power business terminal multi-stage security model based on a security chip, wherein the power business terminal multi-stage security model comprises a credible software stack function framework comprising the following parts of credible access control, data privacy protection, resource access control, data existence and workability verification and data isolation technology in tolerant database. According to the data security management method of the power business terminal provided by the invention, the built power business terminal multi-stage security model based on the security chip performs security protection to system applications in an application layer; risks of occurrence of vicious incidents such as large area outage caused by illegal data tampering, and illegal command control are effectively reduced, insurance of power grid security and electricity quality of electricity customers is facilitated; running security and power distribution reliability of a power grid can be improved, and the method is of great importance in the aspect of improving quality of service.

The invention relates to an electric appliance energy-saving control device, in particular to a direct control type electric appliance energy-saving monitoring device which comprises a core processing module, a control module, a detection module, a clock module, a power module and a communication module, wherein the detection module is connected with a power supply loop of an accessed electric appliance, detects the power consumption of the accessed electric appliance in real time, and performs recognition according to the running state corresponding to the jump characteristics of the real-time power consumption of the accessed electric appliance; the output signal of the detection module is accessed to the core processing module; the clock module is connected with the corresponding port of the core processing module; the core processing module monitors, meters, analyzes and periodically manages the running state and power consumption of the accessed electric appliance through the clock module; the input and output ends of a control relay of the control module are connected with the power supply loop of the accessed electric appliance; the driving circuit of the control relay of the control module is connected with the core processing module; and the communication module is connected with the communication interface of the core processing module. The device provided by the invention has a simple structure, is convenient to install and use, and can realize the energy-saving control and remote management of the electric appliance.

The invention provides an electric power quality control system and method for a metro power supply system. The electric power quality control system comprises a collection device, an active filter and a monitoring device, wherein the collection device is used for collecting voltages and currents of a high-voltage side and a low-voltage side; the active filter is used for calculating a harmonic current compensation value and a reactive current compensation value according to the collected voltages and currents; the harmonic current compensation value is equal to an opposite number of the sum of a harmonic current component at the high-voltage side and the harmonic current component at the low-voltage side; the reactive current compensation value is equal to the opposite number of the sum of a reactive current component at the high-voltage side and the reactive current component at the low-voltage side; and the monitoring device is used for determining the working mode of the active filter according to the harmonic current compensation value, the reactive current compensation value and the rated capacity of the active filter, and is also used for generating a current compensation instruction according to the working mode, the harmonic current compensation value and the reactive current value of the active filter and transmitting the current compensation instruction to the active filter.

The invention relates to a novel merging unit verifying device which comprises a merging unit verifying device body, a tested merging unit and a PC. The merging unit verifying device body outputs various digital or analog signal sources and a standard clock signal to the tested merging unit, the tested merging unit carries out data processing on the received various signals and transmits the signals after data processing to the merging unit verifying device body, and the merging unit verifying device body transmits the received signals to the PC for analysis. According to the novel merging unit verifying device, independent source tracing of error components of the merging unit is achieved, and the accurate data foundation is provided for calibration or replacement of the merging unit.

The invention discloses a multifunctional automatic phase changing system for a medium / low voltage line and a phase changing method thereof. The phase changing system comprises a master control moduleand multiple execution modules; each execution module corresponds to multiple users that are connected in parallel; the master control module comprises a master controller and a three-phase current sampling unit; each execution unit includes an electronic phase changing switch; and the electronic phase changing switch selects, according to a switching command, one phase corresponding to the switching command from three power supply phases of a transformer to supply a power to the multiple users corresponding to the execution modules. According to the multifunctional automatic phase changing system for the medium / low voltage line and the phase changing method thereof, the master control module and the execution modules are provided, lines in a power distribution area are divided, and the multiple execution modules are controlled via the master control module arranged at a power distribution transformer end to switch three phases of each line, so that three-phase power loads of all switched lines tend to balance; and thus, the unbalancedness of the three phases is improved, the line loss of the power distribution area is reduced, the power quality of the users is guaranteed, and thepurposes of saving the energy and reducing an electricity price are implemented.

The invention relates to a nonlinear fuzzy language power distribution network node vulnerability evaluation method based on a complex network, and the method comprises the steps: constructing a powerdistribution network complex network model according to power distribution network data; determining importance measurement indexes of the power distribution network nodes, and constructing a networknode importance evaluation database; determining parameters of fuzzy rules in the complex network model of the power distribution network; performing data clustering analysis on the database by adopting a clustering method; establishing a nonlinear fuzzy language power distribution network node vulnerability evaluation model based on a complex network; carrying out parameter optimization; analyzing the node vulnerability of the power distribution network by adopting the optimized evaluation model; and maintaining the power distribution network node according to the analysis result. Analysis and accurate evaluation of the vulnerability of the power distribution network node are realized by adopting a nonlinear fuzzy language, so that the power distribution network node is maintained, the cascading failure risk is reduced, safe and stable operation of the power distribution network is ensured, the power utilization demand of a user is met, and the power utilization quality of the user and the economic benefit of a power grid enterprise are improved.

The invention provides a control system and method based on a two-stage bidirectional converter. The system is composed of a power unit and a control unit. The power unit comprises a Boost converter and two bidirectional converters, wherein the input end of the Boost converter is connected with the output end of a photovoltaic module, and the output end of the Boost converter is connected to a DCbus. A storage battery and a super-capacitor module are used as the input end of the first bidirectional converter, and the output end of the first bidirectional converter is connected to the DC bus.The input end of the second bidirectional converter is connected with the DC bus, the output end of the second bidirectional converter is connected with the low-voltage end of an isolation voltage device, wherein the high-voltage end of the isolation voltage device is connected with a power grid through an AC bus. The control unit collects a signal fed back by the power unit and transmits a control instruction to the power unit. According to the invention, the peak clipping and valley filling are carried out on the power grid system according to the illumination intensity and the power grid dispatching instruction.

The invention relates to a special energy-saving module for daylight lamps or fluorescent lamps, which is suitable for electronic circuits of various illuminating daylight lamps or fluorescent lamps, such as a 5-40WT8 lamp tube, a T5 light tube, a U-shaped light tube, an annular light tube, a spiral light tube and the like. For most of the energy-saving daylight lamps or the energy-saving fluorescent lamps in the market at present, discrete devices are adopted; the energy-saving ratio is between 40% and 50% commonly and the power factor is between 0.5 and 0.6; the circuit has a high heating value; the energy consumption is much so as to influence the electric quality, and moreover, a production process is complex so that the production cost is increased. As shown in an attached figure in the specification, the invention provides the module, which is simple and easy for operation, has low cost, high energy-saving ratio and improved electric quality and is characterized by employing a harmonic filtering current-follow-up circuit, a frequency energy feedback circuit and an output control circuit to improve the power factor from the original about 0.6 to about 0.95; the energy-saving ratio reaches up to more than 70%; the module realizes the extreme energy-saving effect; and the module is also characterized by reducing 60% of elements of the circuit, ensuring simple and convenient production process, improving the production efficiency and reducing the production cost.

The invention discloses an encapsulating piece of a semiconductor and a preparation method thereof. The invention provides a carrier plate on which a plurality of metal blocks are formed; a resistance layer is covered on the carrier plate and an opening which exposes the metal blocks are formed on the resistance layer, wherein, the width of the opening of the resistance layer is slightly smaller than that of the metal block so as to form a metal layer in the opening of the resistance layer; the metal layer comprises an extension circuit and an extension cushion and a welding cushion which are formed at an end point of the extension circuit; then the resistance layer is removed, and at least one semiconductor chip is electrically connected with the welding cushion, and an encapsulating glue body coating the semiconductor chip is formed on the carrier plate; then, the carrier plate and the metal blocks are removed to expose the metal layer so as to electrically connect the metal layer with external devices through interval conductive materials of the extension cushion of the exposed metal layer, therefore, the extension circuit can be flexibly arranged due to the integration degree of the chip so as to effectively reduce the electric connection path between the chip and the extension circuit.

The invention is an optimization algorithm interaction based method for realizing user power utilization optimization. The method comprises the following steps of: dividing power utilization into an optimizable item and a safety item, establishing a weight standard, setting the weight of each item to account for 50%, wherein the sum of the weights of the two items is unit 1; for the optimizable item, setting weight values of four periods including top, peak, balance and valley periods, setting a predicted total electric quantity, and predicting a weight value of the total electric charge; for the safety item, setting the weights of an ammeter reading abnormal index, an ammeter communication abnormal index and a current abnormal index, calculating the percentage of each index accounts in the unit 1 by using an intelligent optimization algorithm, calculating the power utilization quality data of a user within a certain period by an additive mode, giving the corresponding evaluation and power utilization suggestion according to the different data values, and intelligently completing the power utilization quantity evaluation and suggesting the user in real time in the power utilization improvement to realize the optimization of the user power utilization.

The invention discloses an electric leakage detection system with a trip capture function. The electric leakage detection system comprises a signal detection terminal, a background management platformand a handheld terminal, wherein the signal detection terminal is used for detecting electric leakage current signals of mounting nodes and uploading the detected current signals to the background management platform; the background management platform is used for recording and processing the electric leakage current signals uploaded by the signal detection terminal, generating common electric leakage events, important electric leakage events and trip events, and sending the generated trip events to the handheld terminal so as to immediately remind workers to carry out processing. The electric leakage detection system is capable of detecting the electric leakage conditions of lines and recognizing trip reasons of electric leakage protectors, so as to improve the electricity utilization quality and improve the electricity utilization safety; and through a 4G network, real-time communication is carried out, real-time data can be checked conveniently, and site conditions can be respondedin time, so that the efficiency of the workers can be greatly improved.

The invention discloses a power consumption processing method and device, a storage medium and a processor. The method comprises the following steps: obtaining metering data in an electric meter; obtaining management data, the management data including information of a user to which the electric meter belongs, information of electric equipment under the electric meter, and an electricity price strategy; and generating a power consumption analysis report of the user according to the metering data and the management data acquired in the preset time period. According to the invention, the technical problem that the power consumption of the user cannot be reasonably guided in the prior art is solved.

The integrated circuit chip includes one silicon base board, at least one circuit, one fixed sealing ring, one earthing ring and at least one protecting ring. The circuit is formed on the silicon base board and has at least one I / O pad. The fixed ring formed on the silicon base board encloses the circuit and the I / O pad. The earthing ring formed between the silicon base board and the I / O pad is connected electrically to the fixed sealing ring. The protecting ring on the silicon base board and around the I / O pad is connected electrically to the fixed sealing ring.

The invention discloses a high overload capacity distribution transformer. The high overload capacity distribution transformer is characterized by comprising a transformer core (1), an F-grade insulation grade winding (2), high-fire-point transformer oil (3), a transformer tank (4) and a transformer accessory (5), wherein the transformer core (1) and the F-grade insulation grade winding (2) form an F-grade insulation grade transformer body, the transformer core (1) serves as the magnetic circuit portion of the transformer, the F-grade insulation grade winding (2) is arranged outside the transformer core (1), the F-grade insulation grade winding (2) comprises low-voltage coils and high-voltage coils arranged outside the low-voltage coils, and the F-grade insulation grade winding (2) serves as the circuit portion of the transformer. The high overload capacity distribution transformer is particularly suitable for being used for the conditions of large in short-time power utilization load, the power utilization quality can be improved, transformer accidents can be reduced, the service life of the transformer can be prolonged, the high overload capacity distribution transformer has the advantages that the structure is novel and reasonable, the performance is reliable, and the high overload capacity distribution transformer is particularly suitable for power supply of rural areas.

The invention relates to the new energy microgrid technology and is to provide a photovoltaic energy-wind power-methane-based rural household energy system and a control method thereof. According to the system, a methane tank serves as an intermediate device to enable a methane generator, a micro gas turbine and a household gas stove to be connected, and carbon dioxide generated by the micro gas turbine and carbon dioxide generated by the household gas stove are fed back to the methane generator to serve as raw material for generating the methane, thereby realizing a complete chain of methane generation, storage, consumption and exhaust feedback, and forming gas interconnection; and meanwhile, with the methane generator serving as a controllable load and the micro gas turbine serving as a controllable power source, an energy management device carries out power scheduling on the micro gas turbine and the methane generator, and the methane serves as an energy buffer to ensure power utilization stability. In the whole circulation process, lowest carbon emission and maximum utilization of renewable energy sources are realized, thereby protecting environment and helping rural residents to save electricity cost.

The invention relates to an efficiency service system of an electrical power unit, which comprises an efficiency control module and an energy consumption management module, wherein the efficiency control module comprises a unit for regulating economic operating voltage, a unit for improving power factors, a unit for effectively regulating three-phase equilibrium, and a unit for eliminating high order harmonic of electric networks; and the energy consumption management module comprises a unit for monitoring energy loads, a unit for counting energy consumption data, a unit for networking energy consumption data, and a unit for constructing energy networks. Because the technical scheme adopts the efficiency control module and the energy consumption management module and also adopts an electromagnetic valve technology, the output three-phase voltage and current tend to be balanced and stable, and the efficiency service system of the electrical power unit can regulate the excess voltage, reduce the starting current, suppress high order harmonic and filter surges to achieve the purposes of improving the power utilization quality and reducing the consumption of abundant energy to save electrical energy; and meanwhile, the service efficiency and the service life of the electrical power unit can be also improved.

The invention relates to a high-efficiency discharging feedback type battery charging power source, which comprises a main control module and an isolation transformer, wherein the isolation transformer is connected with a three-phase power supply end, secondary sides of the isolation transformer are connected by a star and a triangle, the output ends of the star and the triangle are respectively connected with two input ends of a 12-phase rectifier through two interlocking contactors, the output ends of the 12-phase rectifier are respectively connected through corresponding filtering inductances to form a common direct current bus, the common direct current bus is connected with a plurality of charging and discharging circuits and a sine wave inverter in parallel, each charging and discharging circuit comprises a plurality of charging subcircuits and discharging subcircuits for controlling the charging and discharging of the corresponding storage battery, the interior of each charging subcircuit or each discharging subcircuit comprises a power measuring unit, a main control module is connected with the corresponding power measuring unit to collect the charging power of each charging subcircuit and the discharging power of each discharging subcircuit, and the sine wave inverter is controlled to invert the bus voltage back to an alternating current power grid when the total discharging power is greater than the total charging power.

The invention discloses an energy storage management system based on ubiquitous power Internet of Things. The system comprises a new energy power generation side used for generating power by using new energy; a battery management system used for storing electric energy of a new energy power generation side, measuring data information in real time and sending the data information to the cloud storage and data analysis server; a data collection unit used for collecting electric power data and uploading the electric power data to the cloud storage and data analysis server after primary processing; a cloud storage and data analysis server is used for receiving and analyzing the power data in real time and generating a control scheduling strategy; a monitoring center used for receiving the power data and the control scheduling strategy and synchronizing them in real time; and an intelligent power distribution cabinet used for receiving the control scheduling strategy or a power scheduling instruction, deploying electric energy and adjusting a power distribution state of a user side. The collected electric power data are stored and analyzed through the cloud storage and data analysis server of the cloud end, data generated in the battery management system are analyzed in real time, and normal charging and discharging in the energy storage management system are guaranteed to the maximum extent.

The invention discloses an artificial intelligence-based distribution transformer anomaly analysis and early warning method, which comprises the following steps: performing sensitivity analysis on associated factors such as air temperature, capacity and operation age limit, constructing a TOPSIS-based evaluation algorithm by using a multi-dimensional data analysis and mining technology, constructing an evaluation model, evaluating and scoring each distribution transformer by using the TOPSIS evaluation algorithm, estimating the distribution transformer overload occurrence probability, issuingan advanced early warning notification to a professional department, providing differentiated operation and maintenance suggestions for abnormal distribution transformers according to the severity reflected by scoring, providing big data support for lean operation and maintenance of the distribution transformers, thus realizing post-event governance to pre-event pre-control, improving the advancedmonitoring, early warning and operation and maintenance level of the distribution transformers, and reducing the distribution transformer overload rate.

The invention relates to an internet of things intelligent power-saving device. The intelligent power-saving device comprises a microprocessor chip and an electric quantity sensor and also comprises an executor and a compensator, wherein the electric quantity sensor is connected with the microprocessor chip, the executor and the compensator are connected with the microprocessor chip, the electricquantity sensor is used for detecting power consumption information of a user and sending the power consumption information to the microprocessor chip, and the microprocessor chip is used for generating compensation operation information according to the power consumption information and sending the compensation operation information to the executor and the compensator. The intelligent power-saving device can provide functions of power utilization management, power utilization equipment monitoring, power utilization quality improvement, waveform distortion reduction, higher harmonic increase reduction, power factor improvement, overvoltage frequency reduction, lightning influence reduction and the like.

The invention discloses an integrated electric energy metering acquisition control instrument. The integrated electric energy metering acquisition control instrument comprises a casing, wherein the casing is internally provided with an electric energy acquisition assembly, an energy conversion assembly, a sequence acquisition assembly, an operation control assembly, an information transmission assembly and a function display screen, the electric energy acquisition assembly is electrically connected with the energy conversion assembly, the energy conversion assembly is electrically connected with the sequence acquisition assembly, the sequence acquisition assembly is electrically connected with the operation control assembly, the operation control assembly is electrically connected with the information transmission assembly and the function display screen. The integrated electric energy metering acquisition control instrument is advantaged in that safe power supply and electricity utilization effects are improved, cost is reduced, and safe and environmental friendly effects are realized.

The invention discloses an intelligent energy-saving device, mainly consisting of a main circuit, a control circuit and control software. The main circuit comprises a magneto-electricity conversion unit and a harmonic suppression energy feedback unit connected in parallel; the control circuit comprises a signal detection unit and a CPU control unit, wherein the signal detection unit transmits bypass instructions to the CPU control unit which transmits node instructions to the magneto-electricity conversion unit and controls the harmonic suppression energy feedback unit. The intelligent energy-saving device further comprises an automatic bypass system comprising a contactor. The invention can restrict transient impact, treat harmonic pollution, stabilize voltage fluctuation and improve the power factor and power efficiency, thereby saving the power cost, improving the power quality, protecting the device safety and prolonging the service life of the device.