1160 results about "Gas insulation" patented technology

The invention belongs to the technical field of intelligent control, and particularly relates to an intelligent regulation and control method for an operating environment in an SF6 ring main unit. The method comprises the following steps: firstly, acquiring temperature, gas pressure and humidity data of a plurality of sampling points in the ring main unit, and constructing a time sequence environment data set through time synchronization and missing interpolation processing; analyzing the temperature data, extracting fluctuation characteristics, determining an environment disturbance factor in combination with an electric arc trigger intensity index, and obtaining a cabinet body temperature control safety factor in combination with a dynamically adjusted temperature rise threshold and a gas insulation state; then constructing an environment equivalent thermal inertia model and a hot-pressure covariant model based on historical data, and calculating a thermal stability index of the cabinet body; and finally, whether adjustment is triggered or not is judged according to the thermal stability index and the temperature control safety factor, if yes, a temperature abnormal area is positioned through a convolutional neural network and a clustering method, the temperature control response level is calculated, a temperature control strategy library is called to be matched with adjustment parameters, and accurate control is achieved.

The invention relates to the technical field of insulated metal-enclosed switchgear, and discloses an environment-friendly gas-insulated ring main unit, which comprises a cabinet body, the cabinet body comprises a pressure relief chamber and a primary loop insulation chamber, a heat dissipation cylinder is fixedly arranged at the bottom in the pressure relief chamber, the top of the heat dissipation cylinder is fixedly connected with a pressure relief pipe, and the pressure relief pipe is fixedly connected with the primary loop insulation chamber. A first electromagnetic valve is fixedly arranged on a pipe body of the pressure relief pipe, and an air storage mechanism is arranged in the heat dissipation cylinder. A plurality of cabinet bodies are combined to form a ring main unit group, when the temperature of one ring main unit is abnormally increased, a corresponding first electromagnetic valve is opened, a sliding plate moves under the action of air pressure in a corresponding primary loop insulation chamber to form a gas storage cavity, insulation gas loss is avoided while pressure relief is performed, and cooling is performed; and the plurality of heat dissipation cylinders can be communicated in sequence, so that the air pressure in the primary circuit insulation chamber can be further improved to achieve a closed pressure relief effect in a cabinet deformation pressure and bursting pressure interval.

The invention provides an intelligent gas supply system of SF6 gas insulation equipment and an intelligent gas supply control method. The system comprises SF6 gas source equipment, the SF6 gas insulation equipment, a gas pressure sensor, a gas temperature sensor and a gas supply control module, the air supply control module comprises a control unit and an electromagnetic valve; the gas inlet end of the electromagnetic valve is connected with the gas outlet end of the SF6 gas source equipment through a pipeline, and the gas outlet end of the electromagnetic valve is connected with the gas inlet end of the SF6 gas insulation equipment through a pipeline; the control module is used for receiving a gas pressure value collected by the gas pressure sensor and a gas temperature value collected by the gas temperature sensor; dynamically calculating a gas pressure dynamic threshold value for judging SF6 gas leakage; the gas pressure value measured in real time is compared with the current corresponding gas pressure dynamic threshold value, and if the gas pressure value measured in real time is smaller than or equal to the current corresponding gas pressure dynamic threshold value, the electromagnetic valve is controlled to be opened, so that the SF6 gas source equipment supplements gas to the SF6 gas insulation equipment.

The invention discloses a gas-insulated switchgear gas leakage repairing method, system, equipment and medium, and relates to the field of equipment repairing. The method comprises the following steps: scanning the gas insulated switchgear to position a gas leakage part, and preprocessing the gas leakage part; determining a scheme for blending a target interpenetrating network coating material according to the characteristics of the air leakage part and the working environment, and coating the pretreated air leakage part with the blended target interpenetrating network coating material to form a target coating; curing parameters are determined according to the type and thickness of the interpenetrating network coating material and the working environment, the power of a heating source is determined through the curing parameters, the target coating is cured through the heating source based on the power of the heating source, and the curing parameters comprise curing time, temperature, humidity and air pressure; and performing air leakage detection on the cured air leakage part to evaluate the repair effect. By implementing the technical scheme provided by the invention, the air leakage problem can be effectively and durably repaired.

The invention discloses an intelligent environment-friendly gas insulation ring main unit, and particularly relates to the technical field of gas insulation ring main units, the intelligent environment-friendly gas insulation ring main unit comprises a cabinet body and a gas box which form the gas insulation ring main unit, the gas box is installed on the back of the cabinet body, and the front surface of the gas box extends into the cabinet body. Air in the whole cabinet body can be extracted and monitored through the draught fan and the gas monitoring alarm instrument, then through the driving mechanism, the connecting assembly, the gas guide hose, the gas inlet hose, the soft magnetic patch and the gas suction hole, whether gas leakage occurs to all the portions, prone to gas leakage, of the gas tank or not can be checked one by one, and when it is determined that gas leakage occurs to a certain portion of the gas tank, the gas tank is closed. The LED lamp strip is electrically communicated with the power adapter, so that the LED lamp strip on the outer side of the current easy-to-leak part emits light, and the air leakage part of the air box is guided for a worker, so that the worker can quickly and accurately detect the air leakage part of the air box after arriving at the site at the first time, and the intelligence and the high efficiency of maintenance of the gas insulation ring main unit are improved.

The invention discloses a state monitoring method and device for gas insulated switchgear and electronic equipment. The method comprises the steps that operation characteristic parameters of the gas insulated switchgear to be subjected to state monitoring are acquired, and the operation characteristic parameters are used for representing the operation state of the gas insulated switchgear; performing analytic hierarchy process on the operation characteristic parameters to obtain an equipment state evaluation value of the gas insulated switchgear; utilizing a preset switch equipment state prediction model to predict the future equipment state of the gas insulation switch equipment based on the operation characteristic parameters to obtain an equipment state prediction value of the gas insulation switch equipment; and based on the equipment state evaluation value and the equipment state prediction value, determining a state monitoring result of the gas insulated switchgear. According to the invention, the technical problem that the efficiency of monitoring the state of the gas insulated switchgear is low in the prior art is solved.

The invention discloses a live detection method for insulation defects of high-voltage power equipment. The method comprises the following steps: firstly, synchronously arranging ultrahigh frequency sensors and acoustic emission sensors on a plurality of monitoring points on the surface of a gas insulated switchgear shell to form an array, and synchronously acquiring signals for filtering pretreatment; then, pulse events are extracted from the two types of signals respectively, and associated pulses in a time window are matched into matched pulse pairs representing the same discharge source; then, carrying out time-frequency transformation on the ultrahigh frequency and acoustic emission pulse waveform in each matched pulse pair, carrying out joint noise reduction by calculating a coherence coefficient between time-frequency distribution matrixes, and extracting a joint feature vector containing an energy ratio, a time parameter ratio and a frequency difference from the denoised time-frequency matrix; according to the invention, multi-source signals are fused, and high-sensitivity detection, high-precision positioning and high-accuracy identification of insulation defects are realized.

The invention discloses a discharge current pulse width inversion method based on an electromagnetic wave signal, and relates to the field of pulse current characteristic inversion, and the method comprises the steps: S1, building a simulation model of partial discharge in a gas insulated switchgear (GIS), carrying out the streamer simulation of the GIS, and obtaining a simulation model of partial discharge in the GIS; establishing a partial discharge excitation source model based on a signal obtained by streamer simulation; s2, an excitation source and four probes are arranged, timing is started when the excitation source radiates electromagnetic waves outwards, and voltage signal waveforms received by the probes are recorded; and S3, processing and analyzing the received signal to obtain the pulse width of the pulse current, and analyzing the inversion pulse current characteristics according to the pulse width of the pulse current. According to the measured pulse width, the definition and characteristics of the pulse current are combined, and key parameters such as the amplitude and the frequency are analyzed, so that the dynamic characteristics of the pulse current can be known.

The embodiment of the invention provides an intelligent GIS defect detection method, a controller, a power grid management system and a medium, and the intelligent GIS defect detection method comprises the steps: obtaining the partial discharge level of a partial discharge position under the condition that the power grid management system detects at least one partial discharge position of a gas-insulated metal-enclosed switchgear; determining a processing sequence table of partial discharge positions according to the partial discharge grade; sequentially acquiring detection data and simulation data of the partial discharge position according to the processing sequence table; determining the defect type of the partial discharge position according to the detection data and the simulation data; and generating corresponding intelligent decision information according to the defect type. The GIS defect detection efficiency is high, the detection cost is low, the partial discharge position and the defect type are displayed on the digital twin model, the visualization is good, and the defect of the partial discharge position with the high partial discharge grade is preferentially processed, so that the loss caused by partial discharge is reduced to the greatest extent.

The utility model discloses a self-dedusting device for an environment-friendly gas insulated ring main unit, which comprises a bottom plate, two springs and two automatic telescopic rods are fixedly connected to the upper surface of the bottom plate, a mounting frame is fixedly connected to the upper ends of the springs, a brush is arranged on the surface of the mounting frame, and the cleaning end of the brush is in close contact with the heat dissipation position of the insulated ring main unit. The upper end of the automatic telescopic rod and the lower surface of the mounting frame are fixedly connected with an electromagnetic block and a magnetic suction plate respectively, the electromagnetic block makes close contact with the magnetic suction plate, positioning plates are arranged on the left side and the right side of the bottom plate and make close contact with the inner wall of the insulating ring main unit, and the upper end of the front surface of each positioning plate is fixedly connected with an air blower. Lead screws are fixedly connected to the left surface and the right surface of the bottom plate, the ends, away from the bottom plate, of the lead screws make close contact with the positioning plate, and butt joint mechanisms are arranged between the lead screws and the positioning plate. Through the device, the dust removal convenience is improved, and the influence of the dust removal device on the maintenance work of the insulating ring main unit is reduced.

The invention belongs to the technical field of simulation analysis, and particularly relates to a medium-voltage environment-friendly gas insulation switch cabinet temperature field modeling method, which comprises the following steps: constructing a three-dimensional geometric model of a switch cabinet and carrying out simplification processing; the COMSOL multi-physics field simulation software is imported; electromagnetic-thermal bidirectional coupling modeling is carried out; adding a surface-to-surface radiation physical field; determining a fluid flow state based on a Glassu number, and selecting a corresponding fluid dynamic model; environment conditions are set, and radiant heat exchange power and a convective heat exchange coefficient are calculated; establishing a grid division strategy based on temperature contribution to obtain a simulation model of preliminary modeling; solving and post-processing a solving result, and analyzing hot spot distribution by using a temperature distribution diagram; a thermocouple is installed in a hot spot area in an actual switch cabinet, actual temperature data are obtained through measurement, and the simulation model subjected to preliminary modeling is corrected according to the actual temperature data. The temperature rise condition can be accurately predicted, and a powerful guarantee is provided for safe operation of equipment.

The invention provides an electric field homogenization device and method for an environment-friendly gas insulation ring main unit and a medium, and relates to the technical field of ring main units, and the method comprises a simulation model construction module which is used for constructing a simulation model; the distribution characteristic fitting module is used for fitting the electric field intensity distribution characteristics into the simulation model; the equipment parameter acquisition module is used for acquiring structure parameters and insulation parameters of the electric field uniform loading equipment; and the homogenization processing module is used for carrying out homogenization processing on the strong electric field distribution of the environment-friendly gas insulation ring main unit. According to the application, the technical problem that the insulation performance and the equipment reliability are influenced by over-high local electric field intensity caused by non-uniform electric field distribution in the environment-friendly gas insulation ring main unit can be solved, and the effects of reducing the local electric field intensity and improving the insulation performance and the equipment reliability by optimizing the electric field to uniformly add equipment and performing simulation model analysis and strategy optimization are achieved. Therefore, the insulation performance and the overall stability of the equipment are improved.

The invention discloses a primary and secondary fusion complete environment-friendly gas insulated looped network box, which comprises a box body, a load switch is arranged in the switch chamber; the gas tank is filled with environment-friendly gas; a cable chamber; a gas storage space is formed between the support and the gas tank; a leak-proof rod; a one-way valve; a closing frame; a drive spring; a mounting hole; a rebound spring; the swing rod is arranged on one side of the load switch and is used for switching off or switching on the load switch; the connecting rod is connected with the swing rod and the driving rod and used for transmission; one end of the driving rod is connected with the connecting rod; the gear is connected to the driving rod; the gear tooth rod is meshed with the gear, penetrates through the air box and is fixedly connected with the sealing plate; when air leakage occurs at multiple positions, the closing plate closes the air box, drives the grounding switch to be grounded and cuts off the load switch. The invention has the following beneficial effects: the primary and secondary fusion complete environment-friendly gas insulated looped network box can automatically detect the gas leakage position and seal the gas leakage position so as to restrain the leakage of environment-friendly gas.

The utility model discloses a double-cooling welding gun which comprises a welding gun head, a welding cable connected with the welding gun head and a wire feeding spring located in the welding cable and the welding gun head, the welding gun head comprises a gun shell and a gun neck located in front of the gun shell, and a double-welding-wire contact tube connected with the wire feeding spring is arranged at the front end of the gun neck. A gas insulation pipe and a water insulation pipe connected to the gas insulation pipe in a sleeving mode are installed in the gun neck, a moving space for the wire feeding spring to move is formed in the gas insulation pipe, an air cooling channel is formed between the gas insulation pipe and the water insulation pipe, and a water cooling channel is formed between the water insulation pipe and the inner wall of the gun neck. An air inlet pipe, a water inlet pipe and a water return pipe which are connected to the connector are arranged in the welding cable, so that the cooling effect on the welding gun is improved, and the welding quality is guaranteed.

The invention belongs to but is not limited to the technical field of gas insulated transmission lines, and discloses a GIL three-pillar grounding electrode copper / graphite system performance optimization method and a GIL three-pillar grounding electrode copper / graphite system performance optimization system. The copper / graphite grounding electrode material is prepared based on a plasma sintering technology, the microstructure morphology, the wear resistance, the conductivity, the Vickers hardness, the heat conductivity and the density of the copper / graphite grounding electrode material are tested, and all the properties of the material are comprehensively evaluated by adopting a radar map evaluation method, so that the grounding electrode material has the considerable conductivity and also has the good wear resistance; a series of equipment faults caused by insufficient wear resistance are reduced, and the optimization of the comprehensive performance of the grounding electrode is realized.

The invention belongs to the technical field of electromechanical engineering and power transmission and transformation, and particularly relates to a multi-loop gas insulation power pipe gallery, a power transmission system and a control method. The multi-loop gas insulation electric power pipe gallery comprises a controller and a pipe gallery main body. The pipe gallery main body comprises a pipe gallery outer wall, two bus bars installed in the pipe gallery outer wall, a plurality of connecting buses, a standby pipeline bus and a plurality of single-phase pipeline buses. The standby pipeline bus, the two bus bars and the gas insulation pipeline bus assemblies are fixedly installed in the outer wall of the pipe gallery through fixing structures. The standby pipeline bus is connected between the two bus bars; the single-phase pipeline bus comprises a first connecting section, a first main body section and a second connecting section which are sequentially arranged along the axial direction; the two ends of each first main body section are respectively connected with the two bus bars through a connecting bus bar, the two ends of each first main body section are respectively provided with an isolating switch, and each connecting bus bar is provided with an isolating switch; and the controller is used for controlling the on-off of each isolating switch.

The invention discloses a GIS equipment electromechanical state and typical defect simulation test platform and a GIS equipment electromechanical state and typical defect simulation test method, relates to the field of electrical equipment electromechanical state and typical defect simulation tests, and solves the problem of simulation and research of electromechanical states and defect characteristics of gas insulated switchgear (GIS) under different operation conditions. Wherein the test platform comprises an AC voltage source, a GIS scaling model, a vibration table and an excitation power amplifier, defects are preset in the GIS scaling model, the GIS scaling model is provided with a transparent observation window used for observing the internal condition of the model, and the GIS scaling model is fixedly installed on the vibration table; an alternating-current voltage source is loaded on a GIS scaling model bus to simulate distribution of an electric field in a GIS, and vibration is applied to the GIS scaling model through a vibration table and an excitation power amplifier to simulate GIS vibration caused by current.

The invention provides a temperature rise determination method for gas insulated power transmission equipment, and the method comprises the steps: obtaining a two-dimensional multi-section model corresponding to the gas insulated power transmission equipment composed of a plurality of standard sections based on the structure parameters of the gas insulated power transmission equipment; based on the two-dimensional multi-section model, establishing a two-dimensional multi-section field-circuit coupling model through a Kirchhoff voltage and current equation and an electromagnetic field control equation; through the two-dimensional multi-section field-circuit coupling model, eddy current field distribution and ohmic loss of the gas-insulated power transmission equipment can be rapidly determined. Taking the ohmic loss as heat source excitation of a heat flow coupling field control equation, and solving through a finite volume method to obtain radial temperature rise in the gas insulated power transmission equipment; evaluating the thermal stability of the gas-insulated power transmission equipment by combining the temperature rise of the interior of the gas-insulated power transmission equipment along the axial direction under different working conditions; according to the technical scheme, the accuracy and efficiency of transient temperature rise analysis of the gas insulated power transmission equipment can be effectively improved.

A compression sealing gasket and a sealing system of a gas-insulated portion of a voltage apparatus. The sealing system includes two components fastened together, wherein each component includes an assembly face, and a compression sealing gasket that is arranged axially between the assembly faces. The compression sealing gasket includes a ring-shaped main body having a main axis. The main body has a generally flat planar configuration that extends perpendicular to the main axis and includes an outer side, an inner side, and end faces which delimit the main body along the main axis and connect the sides. The gasket further includes a lip projecting upwards in axial direction parallel to the main axis. The lip is arranged in a distance to both sides and engages a ring-shaped fixation groove formed in an assembly face. The fixation groove receives the lip of the gasket with slight compression.

The invention belongs to the technical field of current transformers, and particularly relates to a current transformer and a production technology thereof.The current transformer comprises a primary winding, the lower end of the primary winding is sleeved with a plurality of secondary windings, an isolation plate is arranged between every two adjacent secondary windings, one end of each isolation plate is fixed to the primary winding, and the other end of each isolation plate is inserted into a groove in the inner side of a shell; epoxy resin is poured in the shell, after the epoxy resin is cured, the lower end of the primary winding and the secondary windings are packaged in the shell, the epoxy resin serves as insulation, and the voltage transformer is suitable for current and electric energy measurement and relay protection in an electric power system with the rated voltage of 66kV and the rated frequency of 50Hz. The oil-free and gas-free SF6 gas insulation device has the advantages of being oil-free, gas-free, flame-retardant, explosion-proof, maintenance-free, high in safety and reliability and the like, is pollution-free to the environment, is a similar product for replacing domestic and external oil insulation and SF6 gas insulation, and is suitable for being used for current and electric energy measurement and relay protection in an electric power system.

The utility model discloses an environment-friendly gas insulation ring main unit with a cable test function. A grounding short circuit bar, a cable test sleeve, a grounding copper bar supporting insulator, a grounding copper bar, a grounding static contact, a grounding static contact supporting insulator, an isolation switch moving contact, an isolation switch static contact, a flexible connection structure, a top parallel sleeve, an incoming and outgoing line sleeve, a space bus and a circuit breaker are arranged in the ring main unit body. Under the condition that the size of a ring main unit and the design structures of a three-station isolating switch and a circuit breaker are not changed, a group of cable testing sleeves are newly added and connected to a grounding static contact through a grounding copper bar, and a grounding short-circuit bar is mounted at the cable testing sleeves and is detachable, when a cable is tested, the grounding short-circuit bar is firstly dismounted, testing equipment is connected with the cable testing sleeves, and then the testing equipment is connected with the cable testing sleeves; the cable can be tested when the grounding switch is kept at the switching-on position, the grounding short-circuit bar needs to be installed and reset after the test is finished, a withstand voltage test is carried out, a cable plug does not need to be disassembled, and a cable chamber cover plate does not need to be opened.

The invention discloses a gas insulation cabinet on-line monitoring method and device, and relates to the technical field of insulation cabinets, and the method comprises the steps: building a discharge signal category library based on a gas insulation cabinet off-line test; a multi-channel sensing unit is optimally arranged in the key area to collect partial discharge signals; performing time-sharing superposition on the multi-channel signals, performing fast Fourier transform to obtain a frequency domain amplitude spectrum, and further extracting voltage frequency domain envelope of the insulation cabinet and voltage energy distribution of the insulation cabinet; calculating an energy distribution difference value with a category library by dynamically adjusting a frequency weight, calculating a frequency domain envelope similarity value by using a dynamic time warping method, obtaining a discharge signal category matching value by combining the two values, and identifying a discharge type. Based on the discharge type and the dielectric characteristics, an energy gradient estimation method is adopted to realize discharge source positioning; and collecting the time sequence characteristics of the positioning points for trend analysis to obtain a partial discharge signal evolution value, dividing the discharge risk level according to the partial discharge signal evolution value, and completing online monitoring and early warning.

The invention discloses an environment-friendly gas insulation ring main unit with a side expansion structure, and mainly relates to the technical field of ring main units. Comprising a bus socket arranged on a mounting plate, a plurality of first limiting blocks are arranged at the end of the bus connector, first protrusions are arranged at the ends of the first limiting blocks, a first inclined plane and a first plane are arranged on the two sides of each first protrusion respectively, a plurality of second limiting blocks are arranged on one side of a fixing plate, and second protrusions are arranged at the ends of the second limiting blocks. A second inclined plane and a second plane which are in contact with the bus socket are arranged on two side parts of the second bulge, a plurality of third bulges and fourth bulges are arranged on one side of the mounting plate and the bus socket, and fifth inclined planes and sixth inclined planes which are in contact with the third inclined planes and the fourth inclined planes are respectively arranged on two sides of the third bulges and the fourth bulges. The bus connecting mechanism has the advantages that the problem that the bus connecting mechanism is inconvenient to install is solved, and the side expansion efficiency and the sealing insulation performance of the environment-friendly gas insulation ring main unit are improved.

The invention discloses a GIL grounding device and a design method thereof. The method comprises the following steps: obtaining structure parameters and operation parameters of a gas insulated transmission line; calculating electrical parameter values of the gas insulated transmission line, wherein the electrical parameter values comprise capacitance, inductance and alternating-current resistance values of the gas insulated transmission line; according to experience and engineering practice, the number and positions of grounding points are selected, the grounding resistance value of each grounding point is determined, and a grounding system arrangement scheme is obtained; building an equivalent circuit of the gas insulated transmission line; performing electromagnetic transient simulation on the equivalent circuit, and determining the shell potential of each point on the shell of the gas insulated transmission line when the transmission line has a short-circuit fault; and verifying whether the maximum shell potential is lower than the critical value of the contact voltage, and if the shell potential is higher than the critical value of the contact voltage, performing design optimization of the grounding device. The condition that the potential of the shell is too high due to failure of a single means can be avoided, the reliability of a grounding system is improved, and a guarantee is provided for safe and stable operation of a gas insulated transmission line.

The invention discloses a mixed gas insulated metal-enclosed switchgear, and relates to the technical field of substation switchgear, the mixed gas insulated metal-enclosed switchgear comprises a box body, a bus chamber, a circuit breaker chamber, a heat dissipation mechanism, a pressure release mechanism and an auxiliary mechanism, the inner cavity of the bus chamber is filled with dry air, the circuit breaker chamber is independently sealed, the heat dissipation mechanism is installed in the inner cavity of the circuit breaker chamber, and the pressure release mechanism is installed in the inner cavity of the circuit breaker chamber. The pressure release mechanism is used for directional pressure release and airflow buffering of mixed gas in an inner cavity of the circuit breaker chamber and impact buffering of power connection points on the circuit breaker chamber, and the auxiliary mechanism is installed on the back face of the circuit breaker chamber. Through the arrangement mode that the bus chamber, the circuit breaker chamber, the heat dissipation mechanism and the pressure release mechanism are matched, the greenhouse effect is reduced, gas liquefaction in the extremely cold environment is prevented, component layering is avoided, the phenomena of overheating and overpressure in the circuit breaker chamber can be avoided, and the insulation performance of gas in an inner cavity of the mixed gas insulation metal-enclosed switchgear is not affected.

The invention discloses an insulation fault type detection method and system for gas insulation equipment, and relates to the technical field of electrical equipment insulation fault detection, and the method comprises the steps: collecting GIS equipment gas, and obtaining a spectrum through a first method; judging the type of decomposition characteristic gas, and absorbing the measured gas; and the insulation fault type is determined through the gas component concentration. According to the insulation fault type detection method for the gas insulation equipment, by simulating different fault types and determining the relationship between the decomposition gas concentration and the fault, the detection error range is reduced, the fault diagnosis accuracy is improved, the detection accuracy of the system is improved through the advanced spectrum detection technology, and the detection efficiency is improved. By means of pollution-free emission and effective utilization of gas resources, the maintenance requirement and detection cost of the system are reduced, the environmental protection property of equipment is improved, and better effects are achieved in the aspects of accuracy, detection cost and environmental protection property.

The invention discloses a parallel double-fracture collaborative breaking structure and method of a vacuum circuit breaker, and belongs to the technical field of circuit breaker structures. The structure comprises a spring operating mechanism, a current sharing mechanism, a transmission mechanism and a double-fracture circuit breaker assembly; the spring operating mechanism is arranged outside a sealed gas box of the gas insulated switchgear, and the spring operating mechanism is connected with the current sharing mechanism and drives the current sharing mechanism to move; the transmission mechanism comprises an upper motion guide rod and a lower motion guide rod, one ends of the upper motion guide rod and the lower motion guide rod are connected with the current sharing mechanism, the other ends are connected with the double-break circuit breaker assembly, and the motion consistency of the transmission mechanism is driven and controlled through the current sharing mechanism; the double-break circuit breaker assembly is connected with the transmission mechanism, and the transmission mechanism drives the double-break circuit breaker assembly to move and is used for switching on and switching off the vacuum circuit breaker switch. According to the invention, the current nonuniformity of the parallel multi-break vacuum circuit breaker in the opening and closing process can be effectively and structurally reduced, and the safety and reliability of power grid operation are improved.

The invention provides an environment-friendly feeder terminal gas insulation ring main unit, and belongs to the technical field of ring main units. Comprising a ring main unit body and a fixing frame arranged on the ring main unit body, a fixing seat is fixedly connected to a pressure relief opening of the ring main unit body, a detachable first barrel is fixedly connected to the interior of the fixing seat, a pressure relief mechanism is arranged in the first barrel, and the pressure relief mechanism is used for treating gas discharged from the pressure relief opening. One end of the fixing frame is fixedly connected with a supporting frame, a gas storage bottle is arranged on the supporting frame, and the gas storage bottle is used for collecting exhausted gas. According to the ring main unit, the pressure relief mechanism is arranged, when the ring main unit body relieves pressure through the pressure relief opening, gas in the ring main unit body ejects the piston block outwards, the gas opening is gradually exposed and opened, and when the gas opening communicates with the pressure relief opening, the gas enters the second cylinder through the first cylinder, so that gas pressure discharge is completed; and the purpose of adjusting the pressure of the pressure relief mechanism can be achieved by adjusting the distance between the second sliding block and the first sliding block, and therefore adjustment can be conveniently conducted according to needs.

The utility model discloses a bus grounding switch operating mechanism of a gas insulation type switch cabinet. The bus grounding switch operating mechanism comprises a mechanism box, and a valve assembly, a locking assembly, a transmission assembly, two microswitch assemblies and an elastic trigger assembly which are arranged in the mechanism box. The transmission assembly is connected with a bus grounding switch and is provided with a handle operation hole, the mechanism box is provided with a through hole corresponding to the handle operation hole, the valve assembly is arranged on the mechanism box in a sliding mode, the through hole can be opened or closed through sliding, and the two microswitch assemblies correspond to grounding opening and grounding closing of the grounding switch respectively. The elastic trigger assembly is arranged on the transmission assembly, the transmission assembly can drive the bus grounding switch to conduct grounding closing / opening by rotating the handle operation hole, meanwhile, the elastic trigger assembly triggers the microswitch assembly, and the locking assembly can conduct unlocking and locking on the valve assembly. The bus grounding switch can be operated through the operating mechanism to enable the bus side of the switch cabinet to be grounded, and reliability and safety of equipment are improved.

The invention provides an efficient design optimization method and platform for gas insulated power transmission equipment, and the method comprises the steps: obtaining a variable set composed of a plurality of variable values according to a structure variable interval of the gas insulated power transmission equipment, carrying out the scanning calculation of the variable set, and obtaining the corresponding vortex field distribution and ohmic loss; determining a target loss value corresponding to each variable combination through a loss regression function; taking the target loss value as heat source excitation input of a thermal circuit model to obtain a temperature target function; obtaining a total cost objective function of the unit length according to the cost of the metal material and the internal insulating gas of the unit length equipment; solving the objective function and the nonlinear constraint function through a multi-objective particle swarm optimization algorithm to obtain a Pareto optimal solution set; determining a final target design scheme from the Pareto optimal solution set by adopting an approximate ideal solution sorting method; according to the technical scheme, the working efficiency of design optimization of the gas insulated power transmission equipment is improved, and the research and development period of the equipment is shortened.