70results about How to "Reduce electrical accidents" patented technology

The invention discloses a drying agent for an mine underground electric apparatus and a preparation method of the drying agent, belonging to the field of drying agent, wherein macromolecule water absorbent, compound of silicon or calcium and alkali halide or modified starch are mixed so as to prepare the powdery draying agent according to part by weight; the macromolecule water absorbent is 35-70 parts; the compound of silicon or calcium is 25-55 parts; the alkali halide or a mixture of the alkali halide and the modified starch is 10-15 parts; the grain size of the macromolecule water absorbent is 0.20-0.40mm; and the drying agent is powdery. According to the invention, raw material is wide in source and is purchased easily on the market; the drying agent is used for high / low-voltage power supply appliances worked on a mine underground high-humidity condition (RH=80-100%); the dry powder resists 6000V voltage or does not be broken down under voltage of 3000V; when moisture rate reaches to 1g / g, the dry powder resists 2500V voltage or does not be broken down under voltage of 1200V.

The invention belongs to the field of power tools, and provides a 10KV bus bridge arrester and online monitor dedicated framework. The dedicated framework mainly comprises a cross framework, a mounting fixing plate, an arrester fixing bracket and an online monitor fixing bracket. The cross framework includes a square tube. An internal groove is disposed on each of four surfaces with larger area of the square tube. A fixing bolt is sleeved in each internal groove. An upper surface of the square tube is provided with the arrester fixing bracket and the mounting fixing plate. A front surface of the square tube is provided with the online monitor fixing bracket. The mounting fixing plate, the arrester fixing bracket and the online monitor fixing bracket are connected and fixed respectively through the fixing bolt and the square tube. Compared with the prior art, the 10KV bus bridge arrester and online monitor dedicated framework has the advantages of integrated design, detachable moving, easy installation and maintenance and high safety performance, and is suitable for promotion in the power industry.

The invention relates to the technical field of gas relay detection and more specifically relates to an oil flow rate online monitoring device and method for a gas relay. The device includes an oil flow rate collecting module, a pressure collecting module, a data receiving module and a control judgment module. Signals collected by the pressure collecting module and the oil flow rate collecting module are transmitted to the data receiving module through wireless transmission and are then uploaded to the control judgment module through a main transformer public control box. According to the invention, real time monitoring can be performed on pressure, oil flow rate, three-side current and zero sequence current during a working process of a single-phase self-coupling voltage transformer and data can be transmitted to a monitoring background. Background monitoring workers can judge whether the voltage transformer breaks down or not according to the collected pressure, oil flow rate, three-side current and zero-sequence current and can check whether a gas setting value is reasonable or not when meeting current surges. The device is simple and is convenient to operate. Electricity accidents can be reduced substantially and good social benefits are brought.

The present invention aims at providing a simulation system and a simulation method based on a three-dimensional real scene, in order to solve the problem that in the existing technical scheme, training can be carried out only when the fault is released. The system comprises: an auxiliary decision data storage module, a history alarm data storage module, a three-dimensional real scene module, a fault simulation module and a data processing module. By implementing the technical scheme of the present invention, the following beneficial technical effects can be obtained that: in the system, the three-dimensional real scene image of the substation is displayed through the three-dimensional real scene module, so that the user can select the fault type for simulation at the input end of the fault type; the fault simulation module displays the fault signal at the position corresponding to the three-dimensional real scene image according to the fault type, so that the user can visually observe the fault signal in the three-dimensional real scene image; and training on site when the fault occurs is not needed, so that the training content is more expert and specific, fault processing efficiency and quality of the monitoring personnel are improved, and the chance of power accidents is minimized to the greatest extent.

The invention discloses an electric power scene video detection method based on environment self-adaption and small sample learning. The method comprises the following steps: motion detection: carrying out environment self-adaption motion detection on a monitoring video by adopting an improved generalized Gaussian mixture model, and marking a detected moving target by using a candidate box; performing corresponding image content cutting according to the candidate box; taking the clipped close-up image as the input of the target detection of the next link; receiving a target detection result, and carrying out visual marking or alarming; target detection: performing targeted adjustment on the YOLOv3 model; and inputting the close-up image into an improved YOLOv3 model for target detection, and judging whether animal invasion occurs or not by judging whether the object is an animal or not. The method has good real-time performance, accuracy and robustness, not only can meet the actual requirements of animal invasion detection of the transformer substation, but also further enriches the research in related fields.

The invention relates to a protecting device for preventing outdoor power equipment from freezing; a net structure with toughness and proper rigidity under the low temperature is fixed on the top of the outdoor power equipment which needs freezing protection; the net structure is called an ice-preventing net. The principle of operation is that: if the net meets ice rain and snow, firstly the ice-preventing net freezes to form an ice cap which shades the outdoor power equipment positioning on the lower part free from freezing disaster. The design of the net structure is to reduce windage resistance and prevent gale damage. For mountainous areas with small wind power and rainy areas, the net structure is designed to a structure which is similar to a multiply eave with one layer pressing on another layer in order to increase certain anti-storm performance. The invention can preserve the electric appliance performance of the power equipment under the disastrous weather and reduces the power accidents caused by the reduction of equipment insulation. The invention can remarkably strengthen the safety of an outdoor power system.

The invention discloses a protective method for electrical fire hazards based on three-proofing means. The method comprises three-proofing means of manual proofing, material proofing and technical proofing. An electrical management doctor operation mode is adopted and dynamic monitoring is implemented to ensure electrical safety. The material proofing ensures real-time protection when equipment and lines have faults. The manual proofing enables distribution lines and equipment to be kept in good operation conditions by regular inspection and maintenance. The technical proofing combines the Internet, which can timely upload electric energy information and electrical environments to a management center. Through the three-proofing means, the electrical accidents are effectively avoided, the occurrence of electrical fire hazards is lowered, the needs of users are met, and popularization and application in industries are facilitated.

The invention discloses a dust suppression device for an electrical work place. The dust suppression device comprises a main hollow shell and a primary suction filter mechanism, wherein a plurality ofsupporting legs are arranged at the bottom of the main hollow shell; a turbine extraction mechanism assembly space is formed in the bottom of the center of the main hollow shell; a main air inlet pipeline communicated with the turbine air extraction mechanism assembly space is arranged at the center of the bottom of the main hollow shell; and a liquid water injection space is formed inside the main hollow shell, and is positioned right above the turbine air extraction mechanism assembly space. The dust suppression device has the effects of dust suppression and humidity removal for dust and humid air in the air in a specific place, so that dust density and humid density in the air can be reduced, occurrence of electrical accidents can be reduced, and precise instruments can be protected toa certain extent; furthermore, the device can be used for suppressing dust by utilizing a water filter mode, and has the characteristics of good dust suppression effect.

The invention discloses an intelligent fire fighting electrical control gear which comprises an air circuit breaker, a control gate circuit, a main control unit and an electric leakage prechecking protective circuit, wherein the electric leakage prechecking protective circuit is connected with the control gate circuit and the main control unit; the control gate circuit is connected with an opening / closing locked coil of the air circuit breaker; and the air circuit breaker is connected in a main three-phase power supply loop in series. The intelligent fire fighting electrical control device also comprises a temperature prechecking protective circuit, a default phase sampling circuit, a voltage sampling detection and over-voltage low-voltage protective circuit, an electric current sampling detection and overcurrent open-phase protective circuit, a short-circuiting protective circuit and a short-circuiting prechecking circuit. The intelligent fire fighting electrical control device has the characteristics of multifunction and intellectualization and is beneficial to ensuring the safe operation of electric equipment.

The invention relates to the technical field of intelligent power utilization monitoring platforms, and concretely relates to a method and a system for intelligent power utilization scheduling based on the Internet of Things. The method comprises the following steps: firstly, acquiring operation data of electric equipment in each area and acquisition information uploaded by acquisition equipment in each area in real time; secondly, determining the personnel distribution condition of each area and the personnel distribution trend of other areas except the area based on a recognition result obtained by recognizing the acquired information of each area; and finally, controlling the operation state of the electric equipment in the area according to the personnel distribution condition of eacharea and the operation data of the electric equipment in the area, and scheduling the operation state of the electric equipment in other areas according to the personnel distribution trend of other areas. Therefore, scientific power utilization management and control and scheduling can be realized based on the identification result and the operation data of the power utilization equipment, so thatwaste of electric energy and occurrence of power utilization accidents can be reduced.

The invention discloses a sensor on-line isolation communicating device under the pressure, and relates to the related technical fields such as electric systems and chemical engineering. The sensor on-line isolation communicating device comprises an isolation communicating device combination and a pressure, temperature and humidity composite sensor; the isolation communicating device combination is constituted by a flange outer sleeve, a movable sealing ring, a screw sleeve and an isolation inner sleeve; and gas inlets are formed in the circumferential direction of one end of the flange outersleeve and one end of the isolation inner sleeve. The invention further discloses a control method of the sensor on-line isolation communicating device under the pressure. The control method comprisesthe following steps of A, assembling; B, fixing; C, measuring; D, tooling; and E, replacing. By arranging the isolation communicating device, the structure is simple, operation is convenient and reliable, the pressure, temperature and humidity composite sensor can be disassembled and assembled online under the situation of avoiding leakage, and the problem that operating equipment cannot replace,calibrate and overhaul the pressure, temperature and humidity composite sensor under the situation of intelligent on-line monitoring is solved.

The invention discloses an energy-absorbing super-hydrophobic super-oleophobic anti-icing coating for a power transmission line and a preparation method thereof, and relates to the technical field of coating coatings, the energy-absorbing super-hydrophobic super-oleophobic anti-icing coating comprises 30-70 parts of fluorine modified organic silicon resin, 5-30 parts of polytetrafluoroethylene dispersion liquid, 1-5 parts of nano titanium dioxide, 1-10 parts of carbon nanotubes, 5-20 parts of modified iron oxide black, 0.1-2 parts of a silane coupling agent, 0.1-1 part of a dispersing agent, 0.1-1 part of a flatting agent, 0.1-2 parts of a defoaming agent and 0.01-0.5 part of perfluorosilicone oil; the energy-absorbing super-hydrophobic super-oleophobic anti-icing coating has the beneficial effects that the energy-absorbing super-hydrophobic super-oleophobic anti-icing coating for the power transmission line has excellent adhesive force and anti-icing performance, and can effectively reduce electric power accidents caused by icing when being applied to power transmission line towers, wires and insulators.

The invention discloses an electric power Internet of Things smart terminal and method based on multi-source data fusion, and relates to the technical field of electric power Internet of Things smart terminals. In order to solve the problems that most power terminals at present cannot realize data interconnection and intercommunication of an intelligent electric meter, a low-voltage circuit breaker, a reactive power compensation device, an electric vehicle charging pile, a water-gas-heat metering device, a user smart home and the like, the data acquisition range is narrow, comprehensive perception cannot be realized, and the intelligent level is low. According to the power Internet of Things smart terminal and method based on multi-source data fusion, on the basis of data received by the cloud platform, intelligent power distribution, intelligent power utilization and smart park are established, comprehensive energy service is developed, accurate perception conforming to a user is jointly achieved, the deep perception and accurate control requirements of a household appliance level are met, and the user experience is improved. A technical scheme is provided for accurate operation monitoring, intelligent control and source network load cooperative operation of electric equipment, and the current problems of electricity utilization safety and energy consumption management are solved.

The invention discloses a wireless power supply system and a control method thereof of a drive trolley used for a peripheral drive rake thickener and belongs to the wireless power transmission system and method. The wireless power supply system is composed of a primary side power supply device, a primary side digital control unit, a primary side wireless communication module, a secondary side receiving and changing device, a secondary side digital control unit, a secondary side wireless communication module and the drive trolley. When the wireless power supply system runs, under the control of the primary side digital control unit, constant current in a primary side magnetic energy transmitting coil is realized, then a secondary side pick up voltage is constant, and the drive trolley is regulated by a speeder to run at a constant speed with different loads. The drive trolley is powered through the wireless manner rather than the traditional current collector device, thus, running accidents such as phase loss and short circuit, caused by corrosion and abrasion of the conducting ring and carbon brush and damaged insulation, are avoided, time and cost spent on maintenance are reduced, safety of the rake thickener is improved, and economic benefit of the coal preparation plant is increased.

The invention relates to a distributed gridding electric energy quality online monitoring and treatment system, which comprises an electric power acquisition system, a communication unit and a rear-end monitoring system, wherein the electric power acquisition system comprises a primary power distribution acquisition and control unit, a plurality of secondary power distribution acquisition and control units and a plurality of tertiary power distribution acquisition and control units; the primary power distribution acquisition and control unit is arranged at a power distribution low-voltage mainoutlet, the secondary power distribution acquisition and control units are respectively arranged at branch boxes, and the tertiary power distribution acquisition and control unit is arranged at a power utilization terminal; the electric power acquisition system is used for monitoring and processing electric power parameters on line; the power acquisition system is connected with the communicationunit, and the communication unit is connected with the background monitoring system; the background monitoring system comprises a cloud platform and a monitoring terminal. According to the system disclosed in the invention, functions of online real-time monitoring and treatment of electric energy quality are realized, and a plurality of devices are used in a networking manner, thereby facilitating intelligent monitoring and management.

The invention relates to an online environment monitoring device, in particular to an online power station fuel store environment monitoring device to solve the problems that the existing environment monitoring device is single in working mode and detection object and particularly high in power consumption. The online environment monitoring device is formed by a plurality of slave node collectors, a main node controller which is in wireless communication with the slave node collectors and an upper management terminal which is wireless communication with the main node controller; every slave node collector comprises a first Nrf24lel control chip, a temperature sensor, a moisture sensor, a sulphur dioxide sensor, a hydrogen sulphide sensor and a carbonic oxide sensor; output ends of the sensors are connected with the input end of the first Nrf24lel control chip through an amplifying circuit; the main node controller comprises a second Nrf24lel control chip; an output end of the Nrf24lel control chip is connected with an exhaust fan and an alarm. The online power station fuel store environment monitoring device solves the problem of difficulties in safe operation and maintenance management of a power station fuel store and achieves digital management of the power station fuel store.

The invention relates to an automatic fire alarm and fire-fighting linkage system for a photovoltaic module outside a window sill wall of a building, and the system comprises a central fire-fighting processor module which is used for receiving a fire signal and transmitting a fire extinguishing instruction and a turn-off instruction of the photovoltaic module; the power supply controller module is used for closing the photovoltaic module after the fire disaster occurs; the cable type linear fire detector module is used for detecting a fire signal of the photovoltaic module in real time; and the fire extinguishing device module is used for performing fire extinguishing operation after the fire occurs. Compared with the prior art, the photovoltaic assembly is installed on the window sill wall of the outer vertical face of the high-rise building, and the photovoltaic utilization rate is increased; aiming at the characteristics that after a building facade photovoltaic module is on fire, the smoke spreading direction is variable, and a temperature sensing and smoke sensing detector is not easy to monitor, a temperature sensing cable is adopted as a sensor, so that the monitoring accuracy is improved.

The present invention provides a power safety hidden danger supervision and management system based on a safety cloud platform and a working method thereof. The power safety hidden danger supervisionand management system comprises a high voltage power supply box, a low voltage power distribution cabinet and a floor distribution box; the high voltage power supply box, the low voltage power distribution cabinet and the floor distribution system are all provided with an electrical data collection terminal; the electrical data collection terminals are connected with a management cloud platform; the management cloud platform is connected with an operation and maintenance server; and the operation and maintenance server is connected with a user terminal. According to the technical scheme of thepresent invention, electrical data in each area is collected respectively by using the electrical data collection terminal of each area, the data is transmitted to the management cloud platform in real time, and the electrical safety hidden danger can be discovered in time, so that a sound and light alarm is performed, supervision and management of power safety hidden dangers can be realized, electricity-related accidents can be effectively reduced, the level of the electricity service can be improved, and the technical scheme has obvious social and economic benefits.

The invention discloses an anti-reclosing mechanism of a dual-breaker molded case circuit breaker. The anti-reclosing mechanism comprises a moving contact support part, a dual-breaker moving contact,a moving contact stop plate, a moving contact spring pin and a moving contact spring, wherein the dual-breaker moving contact comprises two or more moving contact blades; the moving contact stop plateis embedded between the moving contact blades; the dual-breaker molded case circuit breaker generates strong electromagnetic repulsion when in a short-circuit state, so that the moving contact rotates towards a breaking direction; and the moving contact stop plate is embedded into the moving contact and the moving contact is clamped between the moving contact stop plate and the moving contact spring pin, so that the moving contact cannot rotate to be reclosed. The anti-reclosing mechanism is simple in structure and stable and reliable in working.

The invention belongs to the technical field of production of cable materials and particularly relates to a production process of a high-temperature-resistant flame-retarding cable material. The production process includes the steps of: 1) preparing resin base; 2) modifying rubber; and 3) performing extrusive granulation. In the production process, polypropylene resin, polyurethane resin and polystyrene resin are subjected to blend extrusion to form the resin base, which is then mixed with rubber with additives of a flame retarder, an antioxidant, an lubricant and the like in a kneading machine at high speed and high temperature; finally a mixture material is subjected to extrusive granulation to prepare the cable material. The cable material has good high-temperature-resistant and flame-retarding effects, and can be applied in high-temperature and hot environment without problems of aging and breaking and without a problem of combustion of an insulating layer. The production process can reduce production cost and improve economic benefits of enterprise.

The invention relates to a multi-source data fusion high-voltage cable line fault on-line positioning device and method based on a traveling wave principle. The positioning device comprises a data collection device, a data background, a server and an equipment front end. According to the improved cable fault accurate identification and positioning method, signals are deeply researched and analyzed, characteristic semaphore is further extracted by using various signal analysis methods, and through theoretical analysis and simulation, fault judgment can be further improved, and a current cable detection method is improved. Operation and maintenance personnel are assisted to discover cable fault hidden troubles in time, normal operation of the cable is ensured, electric power accidents are reduced, and an effective solution is provided for intelligent detection of a power grid cable line.

The invention discloses a moisture-proof and anti-condensation switch cabinet, which belongs to the technical field of switch cabinets and comprises a switch cabinet, a monitoring host, an in-cabinetmonitoring module and an air supply device are arranged in the switch cabinet, an out-cabinet monitoring module is arranged outside the switch cabinet, and a heating device is arranged at an air outlet of the air supply device. The in-cabinet monitoring module and the out-cabinet monitoring module respectively comprise a temperature sensor and a humidity sensor; and the in-cabinet monitoring module and the out-cabinet monitoring module are respectively in communication connection with the monitoring host, and the air supply device and the heating device are respectively in communication connection with the monitoring host. The invention further discloses a damp-proof and anti-condensation switch cabinet internal environment regulation and control method, the adopted technical scheme is combined with the regulation and control method, the proper temperature and the dry air environment in the switch cabinet can be guaranteed, and the situation that the performance of equipment in the cabinet is affected due to moisture and condensation aging is effectively relieved.

The invention discloses a cutting device for an electrified miniature bus. The cutting device comprises a handle, a supporting frame, a fixed cutter and a movable cutter, wherein the top face of the supporting frame is fixed to the handle so that the supporting frame and the handle can be connected to form an L shape; the top face of the fixed cutter is fixedly mounted at one end of the bottom face of the supporting frame; the top face of the movable cutter is arranged at the other end of the bottom face of the supporting frame in a horizontally-moving mode, and a cutting mouth is formed by the left side face of the movable cutter and the right side face of the fixed cutter. A first insulating shell is wrapped on the outer surface of the handle and the outer surface of the supporting frame. A second insulating shell is wrapped on the left side face, the bottom face, the front face and the rear face of the fixed cutter. A third insulating shell is wrapped on the right side face, the bottom face, the front face and the rear face of the movable cutter. The cutting device has a good insulating property, dangerous points existing in secondary cutoff work of the miniature bus in the replacement process of a protective screen are reduced, power accidents are reduced, and meanwhile the working efficiency is improved.

The invention discloses an outdoor windproof type communication machine room which comprises a rain sheltering plate, a support base, windproof fasteners, a shell and wind shielding assemblies. The rain sheltering plate is fixedly welded on the upper surface of the shell, wind shielding and rain sheltering effects can be realized by the rain sheltering plate, and the lower side of the shell is fixedly welded on the support base. The outdoor windproof type communication machine room is characterized in that the windproof fasteners are symmetrically arranged on two sides of the upper surface ofthe support base relative to the shell, induced draft plates are welded on the upper portions of two ends of the support base, the wind shielding assemblies are symmetrically mounted on two side wallsof the shell, and two doors are symmetrically arranged on the front side of the shell. The outdoor windproof type communication machine room has the advantages that the outdoor windproof type communication machine room can be stably supported; the shell can be prevented from being damaged by excessively strong wind force in external environments, accordingly, the probability of occurrence of electric power accidents can be indirectly lowered, energy can be saved, environments can be protected, and the outdoor windproof type communication machine room is suitable for popularization and utilization.

The invention discloses an insulator pollution level monitoring method based on leakage current phase difference. The method is implemented through insulator leakage, and comprises the following steps: a monitoring device synchronously collects leakage current and the relative humidity of the environment; band-pass filtering is carried out on the leakage current; the relative humidity is verified; the fundamental component of voltage is deduced; phase information of voltage and leakage current at the same moment under different relative humidity is extracted; the phase difference between the voltage and the leakage current is calculated; the relative humidity is verified; the K value is calculated; a table of K values and pollution levels is queried to obtain the level of insulator surface pollution. According to the invention, the phase of voltage can be obtained without measuring a voltage signal, the level of insulator surface pollution is evaluated based on the phase difference between the leakage current and the voltage of an insulator and the humidity change, and real-time monitoring of insulator surface pollution level is realized. The method has the advantages of low measurement error and high precision, and can well adapt to porcelain insulators at different voltage levels.

The invention discloses an electrolyzer maintenance power supply method and a structure. According to the method, a power distribution room is built in the middle part between two powerhouses, and the power distribution room is provided with two ways of electrolyzer maintenance box power supplies for providing power for electrolyzer maintenance boxes in the two powerhouses; and the two ways of electrolyzer maintenance box power supplies are connected with busbars passing through the two powerhouses via main cables, and the busbars provide power for the electrolyzer maintenance boxes in the two powerhouses via branch cables. 16 circuits for power supply in the prior art are changed in 2 circuits for power supply. a connection mode of combining the busbars and the cables is adopted. Maintenance and repair of the cables can be reduced, one-time input cost of the cables is saved, and electrical accidents can be reduced. in addition, as only one-way power supply enters each electrolyzer maintenance, the construction difficulty is greatly simplified, and the construction cost and the construction period can be saved.

The invention provides an agricultural outdoor protective type junction box. The agricultural outdoor protective type junction box comprises an inner junction box and an outer protective box, wherein the inner junction box is arranged in the outer protective box which is fixed on a galvanized flat iron fixed cross arm; an insulation installation plate is fixed in the inner junction box via a fixing screw; a residual-current circuit breaker is installed above the insulation installation plate; four wiring columns are installed below the residual-current circuit breaker; copper core leads are installed between the lower port of the residual-current circuit breaker and the upper ports of the four wiring columns; the bottom of the inner junction box is provided with an inner wire inlet and four inner wire outlets. According to the invention, the wiring problem for temporary electricity utilization of rural irrigation and drainage and harvesting and degranulation is solved; the agricultural outdoor protective type junction box is installed on a farmland electric pole, so that the electricity using accidents are reduced; the agricultural outdoor protective type junction box is simple and easy to install, is convenient in wiring, and is safe and reliable; the outer protective box reliably prevents the inner junction box form being affected and damaged by external force or severe weather.

The embodiment of the invention discloses an intelligent identification method and device for the type and working state of an electric appliance, and the method comprises the steps: determining a time-electric power two-dimensional image of a target electric appliance according to a time-varying electric power curve of the target electric appliance; and identifying the type and the working stateof the target electric appliance according to the time-electric power two-dimensional image and a preset convolutional neural network. According to the embodiment of the invention, the method comprises the steps: determining a time-power two-dimensional image of an electric appliance according to a time-varying power curve of the electric appliance; and the type and the working state of the electric appliance are identified according to the time-electric power two-dimensional image and a preset convolutional neural network. According to the method for intelligently identifying the type and theworking state of the electric appliance by utilizing deep learning, manual participation is not needed, a large amount of labor cost is saved, and power utilization accidents are reduced.

The invention provides an electrical singular point monitoring device based on a frequency energy proportion, belongs to the technical field of power quality protection, and aims to solve the problemof insufficient real-time performance of voltage drop and frequency drop monitoring depending on a whole cycle or a half cycle in the prior art. The device comprises a data conversion module, a signalprocessing module, a power supply module, a fault discrimination module, a communication module and a function additional module. According to the design of the invention, the problem of insufficientreal-time performance of power monitoring of a use scene with high requirements for power quality can be solved; a power quality change signal with high real-time performance is provided for a dual-power equipment switching device; and early warning for serious voltage drop and frequency drop can be realized, and the electric power accident caused by the problem of electric power quality can be reduced to the greatest extent.