All measures to improve the reliability of conventional DC transmission are still effective for improving the reliability of UHVDC transmission and should be further strengthened. It mainly includes: reducing the failure rate of the component parts; adopting a reasonable structure design, such as modularization, openness, etc.; widely adopting the concepts of redundancy, such as control protection systems, parallel redundancy of water cooling systems, and serial redundancy of thyristors; Strengthen equipment status monitoring and equipment self-test functions.
In view of the problems existing in conventional DC projects, such as station power systems that have led to DC system pole or bipolar outages, transformer protection relays, faults in DC protection system units, and other weak links in UHVDC transmission systems. Design and construction will take measures to improve. In addition, the training of operation and maintenance personnel will also be strengthened and the replacement of wearing parts will be appropriately increased.
To increase the reliability of UHV DC transmission projects, it is also possible to ensure that each inverter between each pole and between each pole is maximally independent from each other in terms of design principles, so as to avoid mutual fault transmission. Apart from the main loop, its independence also needs to be considered: valve hall layout, power supply system, water supply system, cable trench, control protection system, etc.
Shanghai Miyuan Electric Co., Ltd. produces and sells the following products: ZGF DC high voltage generator, high voltage voice phasor, DC resistance tester, battery load tester, loop resistance tester, microcomputer relay protection tester, grounding resistance Tester, high-voltage wireless nuclear phase analyzer, high-voltage test transformer, DC single-arm double bridge, DC high-voltage generator, tubular electric heater, dielectric oil dielectric strength tester, watch-type near-electricity alarm, zinc oxide arrester tester , Insulation Resistance Tester, High Voltage Megaohmmeter, High Voltage Insulation Mat, Short Circuit Grounding Cable; Portable Dynamic Balance Measuring Instrument, On-the-Spot Dynamic Balance Measuring Instrument, Long Range Infrared Thermometer, High Voltage Insulation Mat in Distribution Room, Transformer Loss Parameter Intelligent Test Instrument, insulation boots gloves pressure test device, transformer characteristics integrated test bench, tie rod flow meter, ultra high voltage withstand tester, three-phase multi-phase volt ammeter, intelligent dielectric loss tester, intelligent loop resistance tester, Lightning counter calibrator, transformer on-load switch parameter tester, mine cable fault detector, zinc oxide arrester detector, dip In-line tubular electric heater, DC resistance meter, digital ground resistance meter, portable digital vibration meter, infrared thermometer, frequency conversion series resonant test device, high current generator, vacuum oil filter manufacturer, voltage resistance tester, Wireless high-voltage nuclear phase meter and so on.
The machine is provided with such functions as automatic lifting, mixing, lowering, etc. A bin mixer and variety mixing bin of different specifications ,it can meet the mixing requirements of different batches and diversified varieties of products. It is an ideal machine for mixing in pharmaceutical plants. It is also widely used in such industries as medicine, chemical industry, food, etc.
Features:
â—This machine is a new model that our company has extensively absorbed and digested foreign advanced technology, successfully developed in combination with national conditions. Reasonable structure, stable performance, convenient operation, no dead corners, and no exposed bolts.
â—The rotating body (mixing bin) symmetry plane is at an angle of 30°to the rotation axis. The materials in the mixing bin rotate along with the rotating body and make tangential movement along the hopper walls, producing strong turning and high-speed tangential movement and achieving the best mixing effect.
â—It adopts PLC automatic control . It is provided with the infrared safety device and the discharging butterfly valve with the misoperation preventer to ensure safe production.
â—One machine can be equipped with bins of various specifications and quantities.
â—The machine effectively controls dust pollution and cross contamination, reduces loss of materials, controls material layering, optimizes production processes.
â—Meet GMP requirements.
Working Principle:
The machine is composed of two machine bases, rotation frame, rotation system, lifting system, control system, etc. Push the mixing bin into the rotation frame and complete the positioning. Start the control system to lift the rotation frame to the mixing height and clamp it reliably. The driving system will carry out automatic mixing according to the set time, rotation speed and other data. After the mixing operation is finished, the rotation frame will stop vertically, the bin will automatically fall to the ground, the machine will stop and process data will be printed. The bin is transferred to the next procedure.
Automatic Lifting Bin Blender,Automatic Lifting Blender Bin,Automatic Bin Blender Machine,Automatic Bin Blender
Jiangyin Jirui Machinery Manufacturing Co,LTD , https://www.jyjiruimachine.com