1501 results about "Power engineering" patented technology

The inventive compound heat engine consists of a power circulation system and a refrigerating circulation system, in which is mounted a control system. It can provide the fields of power engineerings, refrigerating engineerings, communications and transportations, pumping irrigations and the like with mechanical work or electric energy. It not only can convert the high-grade energy, such as the fossil fuel, the nuclear fuel and soon into mechanical work or electric energy, but also can convert the low-grade heat energy stored in the seawater, the air and the earth crust into mechanical work or electric energy. Is also can convert the new energy like the solar energy and the renewable energy into mechanical work or electric energy.

The invention discloses an anti-impact and wear-resistant mortar, belonging to the field of a repairing material in water-power engineering. The difficulty that the constructions in the conventional water-power engineering is difficult to repair after being damaged by rushing and abrading with water with sands and stones can be solved. The anti-impact and wear-resistant mortar comprises the following components in parts by weight: 39-48 parts of silicate cement, 45-50 parts of graded hard fine aggregate, 0.05-0.25 parts of water reducing agent, 0.05-0.3 parts of de-foaming agent and 0.05-1.5 parts of nanometer material. The anti-impact and wear-resistant mortar provided by the invention has the advantages of high anti-impact and wear-resistant strength, low elasticity modulus and good anti-crack property, and is a finished product material with a higher application value for repairing through irrigation works.

The invention relates to an on-line monitoring oil-gas separation device for a transformer, and belongs to the technical field of power engineering. The device comprises an oil-gas separation chamber, a vacuum pump, an ultrasonic vibrator, a scavenge oil pump, a PLC control module, an electromagnetic valve, a liquid level detector, an oil-gas filter, a throttle valve and a connecting pipe. All electric parts are controlled by the PLC module to cooperate with each other to work in real time. The device utilizes a method of combining the vacuum pumping and the sonic oscillation principle for the oil-gas separation, so that the degassing efficiency is higher and the degassing process is faster; and moreover, the device also has the advantages of high automaticity, small volume and convenient arrangement, and is quite suitable for detecting faults based on dissolved gas in the oil of oil immersed type equipment such as a transformer and the like.

The invention belongs to the field of power engineering and provides a symmetrical obtaining method for nodal voltage sensitivity in an alternating-direct current parallel-serial power grid. In the symmetrical obtaining method, on the premise of obtaining an independent vector, a nodal voltage vector and a nodal charging power vector of the alternating-direct current parallel-serial power grid, aunified partial derivative formula is built for obtaining the voltage sensitivity of each node according to a relationship equation of the independent vector and the nodal voltage vector, and a function relationship expression of the nodal charging power vector with respect to the independent vector and the nodal voltage vector, so that the symmetrical obtaining for the voltage sensitivity of allnodes in the alternating-direct current parallel-serial power grid is achieved, thus the symmetrical obtaining method reflects an instigating action of a direct-current feed-in system to active powerand instigated performance to inactive power, and also reflects a purpose that the work of a balancing generator in the alternating-direct current parallel-serial power grid satisfies an objective law of a circuital law.

The invention provides a heat resistant aluminum alloy conductor material and a preparation method thereof. The heat resistant aluminum alloy conductor material comprises the following components of 0.06-0.15 % of zirconium, 0.15-0.30 % of erbium, 0.10-0.20 % of iron, less than 0.05 % of silicon, less than 0.01 % of inevitable impurities like titanium, vanadium, chromium, manganese and the like and the balance of aluminum. According to the preparation method, the heat resistant aluminum alloy conductor material is directly rolled after each component is fused and cast. The conductor material can realize that the electric conductivity can reach 59.5-60.5 % IACS (International Association Of Classification Societies), the long-term heat resistance temperature can reach 180 DEG C and the short-term heat resistance temperature can reach 210 DEG C without heat treatment; therefore, the conductor material is an electric wire and cable conductor material with great potential. The conductor material can be widely used for construction and capacity expansion reconstruction of electric power engineering; and by using the conductor material, the transmission line capacity is largely increased, the transmission line loss is reduced, the distance between poles of the transmission line can be increased, the line building cost is reduced, the tense corridor resources are saved and obvious economic benefit and energy-saving and environment-friendly significance are obtained. The heat resistant aluminum alloy conductor material provided by the invention has the advantages of reasonable component mixing ratio, simple preparation process, convenience for realizing continuous production and suitability for industrial application; and the production cost and the energy consumption of the heat resistant aluminum alloy can be effectively reduced.

The invention relates to a method for diagnosing photovoltaic power station faults on the basis of a fuzzy clustering algorithm, and belongs to the technical field of electrical power engineering. The method comprises the following steps: on the basis of a fault knowledge library system, matching and combining the data of a fault alarming sample to be tested with similar data samples of various fault types in the fault knowledge library system to form a fault data matrix which serves as the input quantity of an algorithm, wherein the data samples form an established fact; and according to an output fuzzy membership matrix, automatically comparing membership between the fault alarming sample to be tested and the established-fact data samples of various fault types by the algorithm, and taking the fault type with the highest membership as the fault type which is represented by the fault alarming sample to be tested so as to finish the diagnosis of the photovoltaic power station faults. The method can quickly diagnose the fault type, improve fault diagnosis accuracy and improve the reliability and the stability of the photovoltaic power station, provides fault information and an overhauling scheme for power station operation and maintenance staffs in time so as to reduce losses caused by the faults, and owns a higher utilization value.

The invention relates to a method and system for quick loading and interacting of a monitoring BIM model based on standard schematic handbook management and belongs to the technical field of safety monitoring of water-power engineering. According to the method, a monitoring BIM standard database is established, and managing and loading are carried out layer by layer according to monitoring items; the monitoring BIM module carries out loading in an ordinary direct loading mode and a parameterization loading mode to reduce the workload of model rebuilding according to the monitoring types; geometric model and chartlet information separation is achieved through format conversion by the monitoring BIM model, and model lightweight loading is achieved; by means of a gradating loading technology, quick interacting and displaying of the BIM model are achieved; a multilevel detail algorithm is introduced, when users interact, the different levels of details of the monitoring BIM model are displayed under different sight distances, and the interacting efficiency of the monitoring BIM model is improved. The method and system solve the problem that information loading and interacting efficiency of a monitoring BIM module and auxiliary projects is low and can meet requirements of full-stage monitoring BIM use of the water-power engineering.

The invention relates to a power transmission line tour inspection method and a system based on intelligent mobile terminal, belonging to the technical field of power engineering. The system comprises a system management platform and an intelligent mobile terminal wherein the system management platform and the intelligent mobile terminal are connected by a wireless communication network. The system management platform comprises a system background and a front end Web page. The system background includes a data server and a Web server. The data server has a pre-installed electronic map and pre-collected information of pole towers. The Web server is provided with an intelligent tour inspection module to develop, change and check inspection tasks. The front-end Web page invokes the electronic map and pole tower information in the data server through the Web server. The intelligent mobile terminal is provided with a built-in inspection task module and a hidden hazard acquisition module. The invention can improve the quality and feedback speed of the line inspections, improve the coordination efficiency of the management personnel, reduce the misjudgment of hidden hazards, shorten the processing time for the hidden hazards and avoid accidents in power transmission lines.

The invention relates to cable winding equipment for electric power engineering, in particular to quick cable winding equipment for the electric power engineering. The invention aims to provide the quick cable winding equipment for the electric power engineering, which is easy to operate, does not need a lot of physical strength and can quickly wind a cable on a winding drum. In order to solve the technical problem, the invention provides the quick cable winding equipment for the electric power engineering. The quick cable winding equipment comprises a pedestal, a bottom plate, a first vertical plate, a second vertical plate, a first bearing pedestal, a rotating shaft, a first fixed baffle, a second fixed baffle, a first fixed column and a second fixed column, wherein a left-right moving device is arranged on the pedestal; a moving component of the left-right moving device is connected with the bottom plate; and the bottom plate is located above the pedestal. By multiple fixing effects, the winding drum can be stably fixed, so that people do not need to worry about falling off of the winding drum due to high rotating speed; and meanwhile, the left-right moving device can enable the cable to be uniformly wound the winding drum.

The invention discloses a dual-source power supply system and a dual-source power engineering vehicle. The dual-source power supply system comprises a main circuit for power supply of an overhead contact system, a main circuit for power supply of a traction battery, a rectifying module, an inverter module and an auxiliary inverter module, a power supply switching device for receiving a power supply command of the overhead contact system or a power supply command of the battery, and a controller; The dual-source power supply system will not emit polluting gas, so as to meet the low-emission environmental protection requirements of urban rail. Moreover, the dual-source power supply system can be applied to the two power supply modes of the catenary and the traction battery, and the automaticswitching of the two power supply modes can be realized by using the switching instruction of the power supply switching device and the controller. Therefore, when there is a power area, the application can select the power supply mode of the catenary (power supply mode satisfying the power supply mode of the national railway and AC-DC-AC power supply system), which saves power and has higher efficiency; As that power-free zone is entered, the application can be switch to the traction battery power supply mode, and the electric engineering vehicle can still work normally and has high reliability.

The invention discloses a power cable stripping device for power engineering, which comprises a workbench and a cutting device. A first supporting plate is arranged at the top of the workbench. The cutting device is arranged above the workbench and the first supporting plate. The workbench is equipped with a moving device. Stripping devices are arranged on the two side walls of the workbench, andthe stripping devices are arranged on one side of the cutting device. A power cable is driven by the moving device to do linear motion, so that the labor intensity of workers is reduced. In the movingprocess of the power cable, the upper side and the lower side of the power cable are cut at the same time through the cutting device, the sheath of the power cable is cut off through the stripping devices on the left and right sides of the power cable, and the sheath of the power cable is thus separated from the electrical core of the power cable. Workers do not need to conduct secondary stripping operation, and the working efficiency is improved.

The invention discloses overhaul equipment for preventing a device mistakenly entering a charged interval in a power engineering operation. The overhaul equipment comprises a trolley and a support rod, wherein universal idler wheels are arranged at the bottom part of the trolley; the support rod is arranged on the trolley and is rotationally connected with the trolley; the trolley is provided with a horizontal drive mechanism for driving the support rod to rotate; the support rod is provided with an angle adjusting rod which is in rotational connection with the support rod; the support rod is provided with a vertical drive mechanism for driving the angle adjusting rod to rotate; and a laser lamp, an ultrasonic sensor and a high-power and high-precision telescope camera are arranged at a free end of the angle adjusting rod. By the overhaul equipment, surface image and fault acoustic wave collection is firstly carried out on insulators; corresponding importing, comparative analysis and fault judgment are carried out by an insulator pollution fault analysis system; an insulator pollution state and fault report is finally obtained by integrating the analysis results of two aspects; and hot-line cleaning and overhauling are carried out on the polluted insulators.

The invention provides a safety protecting work trolley for chamber, belonging to the large water-power engineering underground chamber excavating safety protecting instrument, comprising a protecting shed, a working platform, an adjusting device and a moving device, wherein the protecting shed is composed of a protecting roof truss and a steel plate net; the protecting roof truss comprises a level rod, a vertical rod and a bevel rod; the head and tail of the level rod are connected and fixed to the top end of the upright rod; the vertical rod is fixed between two mutually parallel level rods; the bevel rod is mounted between the top end of the vertical rod and two ends of the level rod so as to form the protecting roof truss with symmetrical slopes. The working platform comprises an upper platform, a middle platform and an extension platform; the upper platform is set on the level rod; two ends of the middle platform are provided with platform lifting oil cylinders; the piston rods of the platform lifting oil cylinders are mounted at two ends of the upper platform. The invention is fit for the full process of excavating and supporting chamber; the invention has multiple suitability and high safety protecting design level.

The invention provides a power emergency communication system based on wireless optical networks. The system consists of emergency field communication systems, substation communication systems, a master control and command center communication system and a system network manager. According to the power emergency communication system based on the wireless optical network, the emergency field communication systems, which are mounted at emergency fields of power engineering building construction, power communication failure emergency recovery, power accident field emergency command and the like, are used for collecting information from the audio equipment, video equipment and data equipment of the emergency fields, and collected information is transmitted to wireless optical network devices and then transmitted to the substation communication systems through ultra-long-range wireless optical networks; after the information of the emergency fields is received by substations, the information is further transmitted to the master control and command center communication system through power optical networks; and the system network manager is responsible for the management work of a whole communication network. The power emergency communication system based on the wireless optical networks, provided by the invention, has the advantages of quickness, high efficiency, high bandwidth, ultra-long range, low cost and high safety performance and is applicable to various emergency communication situations.

The invention relates to a marine structure observed behavior multi-dimensional analysis method based on virtual reality and a system and belongs to the water power engineering construction management technology field. According to the method, a three-dimensional display and analysis problem of the marine structure observed data in the virtual reality is solved, in combination with related results, multi-dimensional comprehensive evaluation is carried out, space-time evolution of the marine structure observed work behavior along with an environment factor is dynamically simulated, a space monitoring evaluation model is established, a marine structure health status is rapidly diagnosed, limitations of a traditional two-dimensional result are eliminated, and the method is of great importance in improving a water power engineering management level.

The invention relates to a payoff cutting device, in particular to a cable payoff cutting device for power engineering and provides the cable payoff cutting device for the power engineering. In order to solve the technical problem, the cable payoff cutting device for the power engineering, provided by the invention, comprises a cart, wherein struts are arranged at a left side and a right side of the bottom of the cart, a roller is arranged at the bottom of each strut, a storage battery is arranged at a left side of the top of the cart, installation plates are arranged at a front side and a rear side of a middle position of the top of the cart, a payoff device is arranged between the installation plates at the front side and the rear side, the storage battery and the payoff device are connected through a wire, and a cutting device is arranged at a right side of the installation plate at the front side and is arranged at a front side of the payoff device. By the cable payoff cutting device, automatic rotation can be achieved to discharge a cable, the cable payoff cutting device is good in cable fixing effect, and the cable can be cut; and moreover, by arranging a clamping block and an anti-slip cushion, the device is better in stability.

The invention discloses exothermic welding powder for welding novel grounding grid materials. The exothermic welding powder comprises, by weight, 45%-60% of copper oxide, 8%-13% of aluminum powder, 20%-30% of copper powder, 5%-15% of copper-phosphorus alloy powder, 1%-5% of tin powder, 2%-6% of fluorite powder, 1%-4% of borax powder and the balance alloy powder. The alloy powder comprises, by weight, 8%-12% of Ca, 40%-47% of Si, 28%-32% of Ba and the balance impurities. According to the exothermic welding powder, raw materials are low in price and easy to get, the problems that pores, slag inclusion, hot tear and the like can be easily generated in the welding process by using the exothermic welding powder are solved, the quality of welded joints is reliable, the connecting cost of the novel grounding grid materials is lowered, and the development of a grounding system in electric power engineering in China is facilitated.

The invention discloses a grounding line device for maintenance of a power transmission line in power engineering. The grounding line device comprises an installation sleeve, a support sleeve, a threaded rod, a first bevel gear, a second bevel gear, a clamping device, a grounding wire and an insertion device, wherein the clamping device comprises an arc installation plate, a pin shaft, arc clamping pincers and a first spring, and the insertion device comprises an external threaded cylinder, a rotation rod, a round disc, a connection rod and a movable rod. The clamping device is arranged, the arc clamping pincers can be used for clamping wires with different diameters under the effect of the first spring, the grounding line device is high in applicability, is simple to operate and is convenient and rapid, and the maintenance speed is accelerated; the insertion device is arranged, the movable rod is punctured into soil outside the external threaded cylinder, on one hand, the insertion device can be stabilized and fixed, and incomplete grounding due to external collision is prevented from causing a safety accident; and on the other hand, a plurality of movable rods can be simultaneously connected with ground, a current can be fully guided to the ground, and a better guarantee effect is achieved.

The invention provides a wire stripper, and belongs to the technical field of a power construction tool. The wire stripper comprises a working installation platform, a sliding guide rail, a movable support, a round cutter blade, a support roller, a cutting mechanism and a press mechanism, wherein the sliding guide rail is arranged on the installation platform, the movable support is arranged on the sliding guide rail, the round cutter is rotatably arranged on the movable support, the support roller is rotatably arranged on the movable support, the cutting mechanism is arranged on the working platform and is arranged at an end of the sliding guide rail, the press mechanism is arranged between the cutting mechanism and the sliding guide rail, and an adjustment mechanism is further arranged on the movable support and is used for adjusting a position of the round cutter blade. During skin stripping and cutting of the wire strip by rotating a cable, an insulation skin on the cable also canbe cut along a length direction of the cable as well as the insulation skin is cut along a radial direction of the cable, the insulation skin on the cable processed by the wire stripper is easier to strip from the cable, so that the cable interconnection working efficiency in power engineering construction or maintenance is greatly improved.

The invention provides an insulation material for a cable joint, which comprises the following components in weight percent: 55-70% of epoxy resin, 15-23% of curing agent, 6-11% of glass fiber, 5-10% of polyethylene reagent and 1-7% of additive. The insulation material of the invention has excellent forming ability, and the material quality is uniform after the insulation material is formed. By detection, the insulation resistance between cables of a cable joint device adopting the insulation material fully meets the requirement of the insulation strength required for the power engineering, the flame resistance of the insulation material reaches V0 level, and simultaneously, the manufacturing cost is very low.

The invention, which belongs to the technical field of the electrical power engineering, particularly relates to a construction method of a resistance reduction and grounding device of a transformer station. The method comprises: a surveyor measures a soil resistivity, a frozen soil depth, and a soil layering situation in a site area of a transformer station to obtain surveying data; a soil model is established according to the surveying data; on the basis of the soil model, a grounding device inside the station is designed in the site area of the transformer station; safety verification is carried out on the grounding device designed at the last step so as to obtain a verification result; if the verification result meets the requirement, a next step is executed; if the verification result does not meet the requirement, a grounding device is arranged externally outside the site area of the transformer station and safety verification is carried out; the verification result is stored; a construction drawing is drawn; and construction is carried out by organizing people. Under the circumstances that no extra collected land is increased, the construction method of the resistance reduction and grounding device of the transformer station is provided. The construction method has characteristics of obvious resistance reduction effect, simple structure, convenient construction, and low cost and the like.

The invention relates to a 50 percent discharge capacity test method for a valve-controlled type sealed lead acid storage battery, which belongs to an online discharge test method for a lead acid storage battery for power engineering. The method comprises the following steps of: connecting protecting devices at both ends of an outlet fuse protector of an estimated storage battery pack in parallel and switching off the fuse protector so that the protecting devices is connected in series in a power supply loop from a storage battery to a direct current bus; carrying out online 50 percent discharge capacity test on the storage battery pack by adopting a storage battery discharge test instrument; carrying out checking discharge by adopting a 10-hour rate discharge current to discharging for 5 hours; when the discharge time reaches 5 hours, and the voltage of any battery end is not smaller than 1.95V, stopping the discharge test and restoring the charge to the storage battery pack; otherwise, carrying out deep activation according to a relevant standard specification, repeating the test twice and confirming whether the residual capacity of the storage battery pack is not smaller than 80 percent C10 or not. The method is simple, visual and effective and can ensure that the power supply of the tested storage battery pack on equipment is not interrupted in the whole process of the test.

The invention discloses an intelligent alarm system for a power distribution network based on technological development of an internet of things, relating to the technical field of a power engineering alarm system. The intelligent alarm system comprises a front end radar detector (1), a controller (2), a communication module (3), a background general controller (4) and a power supply unit (5), wherein the front end radar detector (1), the controller (2), the communication module (3) and the background general controller (4) are connected in sequence; the power supply unit (5) is respectively connected with the front end radar detector (1), the controller (2) and the communication module (3). The intelligent alarm system avoids bad influences to the electric device as a traditional fault detection causes patrol lines to be switched off and switched on many times, provides a convenient and fast technological means for searching hidden permanent fault points, shortens fault removing time, reduces a power failure area, improves electricity sales amount and power supply reliability, accurately notices a momentary fault, thus the intelligent alarm system is helpful for removing the power supply hidden trouble and improving the working efficiency.