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The main rectifier products of Liyuan in the PCB electroplating power field includes TB synchronous rectification high-frequency switching power, high speed negative and positive dual-pulse (VCP line or Gantry line application) power, any combined modular dual-output and quad-output power; TB composite single-output and dual-output power, and TB air cooling and water cooling power; All products are controlled via RS485 communication. The optional WIFI function is reserved. The latest 4G distributed sub-module DC/pulse power system brings a new break-through. Liyuan PCB power features stable performance (sealing and structure), high efficiency (the top efficiency is over 94%), high control precision and small size. Liyuan reduces installation cost via the new one-tank installation mode, improves electroplating uniformity, and optimizes the electroplating process.
Liyuan electrolytic copper foil rectifier account for the domestic market share up to 90%, the full-bridge phase-shift soft switching control method is adopted to eliminate the switching stress to the greatest extent. The advanced logic interlocking control circuit eliminates the false triggering of the pulse and overcomes the short circuit of the bridge arm. The magnetic bias problem is well eliminated. The primary transformer of the main transformer adopts a series DC blocking capacitor, and an automatic bias correction circuit is added.
The following are the field application pictures of electrolytic copper foil rectifier.
High-frequency power supply with high rated power for rare earth smelting industry, used new rectifier mode and rectifier devices, rectification efficiency greatly improved, energy saving skills. Real full waterway structure, no reactive power compensation cabinet, power factor >98%, rated efficiency 95%, real green power supply. Adopt digital network control, control signal has no attenuation, ensure high output precision. Maintenance can be carried out without shutdown, without affecting normal production.
Liyuan Company always adhering to the business concept of “professional, brand, innovation, service”, we put the quality and customer always be first, and strive to create a stable and reliable DC power supply, high-frequency power supply, synchronous mode power supply, high-power SCR rectifier, pulse power supply, variable-frequency power supply and power quality products.
Liyuan Company always adhering to the business concept of “professional, brand, innovation, service”, we put the quality and customer always be first, and strive to create a stable and reliable DC power supply, high-frequency power supply, synchronous mode power supply, high-power SCR rectifier, pulse power supply, variable-frequency power supply and power quality products.
Liyuan Company always adhering to the business concept of “professional, brand, innovation, service”, we put the quality and customer always be first, and strive to create a stable and reliable DC power supply, high-frequency power supply, synchronous mode power supply, high-power SCR rectifier, pulse power supply, variable-frequency power supply and power quality products.
The Xinjiang Dongfang Hope Nonferrous Metals Co., Ltd. is one of the larger projects of Xinjiang Dongfang Hope Nonferrous Metals Co., Ltd. The project can produce 2×500,000 tons of electrolytic zinc annually. There are 8 rectifier units in the first electrolysis series; 8 rectifier units in the second electrolysis series. For this project, our company provided 16 sets/32 sets of KES-2×41KA/1570V rectifier cabinets, 16 sets of KZX10-12 unit current stabilization control cabinets, 2 sets of ZX-110 series master control panels, and 2 sets of power grid stability control devices. 2 sets of ZL-200 host computer rectification automation monitoring system. This project is the second electrolytic zinc project operated by isolated network in China, and it is the first in many domestic firsts. Since the power transmission in July 2015, the separation from the peripheral network has been realized, and the direct supply operation mode of the isolated network is completely meaningful.
The project has an annual output of 2 × 450,000 tons of electrolytic aluminum. The electrolysis series adopts 500kA electrolytic cells, and each series is installed with 336 units. The first electrolysis series has 9 rectifier units; the second electrolysis series has 8 rectifier units. The project adopts 17 sets/34 sets of KES-2×45KA/1480V rectifier cabinets of our company, 17 sets of KZX10-12 unit current stabilization control cabinets, 3 sets of ZX-110 series master control panels, 3 sets of power grid stability control devices, ZL- 2 sets of 200 upper computer rectification automation monitoring systems.
Under the isolated grid operation, the control strategy is mainly completed by the coordination and cooperation between the frequency modulation device of the rectifier system and the stability system. Frequency modulation device function: The frequency modulation device is mainly used in the electrolytic aluminum control system of the isolated network, and the frequency is stabilized by adjusting the electrolytic aluminum load in response to the abnormal frequency caused by the electrolytic aluminum effect voltage and the switching of major electrical equipment. The frequency modulation device directly collects the real-time frequency of the power grid, and adjusts the load according to the set value of the collection frequency. Usually, when the frequency is between 49.5Hz and 49.0, the frequency modulation device assists the generator set in one adjustment to stabilize the frequency within the frequency modulation dead zone range (49.8±0.2Hz). It belongs to the frequency fine tuning operating system. Its advantages: fast adjustment rate, high precision, short frequency recovery period, and at the same time, it can reduce the frequency of the primary frequency modulation action of the generator set, reduce the mechanical action of the generator set, and improve the life of the generator set. Cooperate with safety control strategy for load shedding: When there is a major load loss in the power grid (the grid-side generator set fails or the load-side rectifier unit trips), the safety control and load shedding are carried out. The safety control system adjusts the cut electrolytic aluminum load according to the loss load of the power grid, so as to achieve the power balance between the grid side and the load side. Usually, the stability system adopts two sets of stepless load shedding scheme, that is, the main and standby load shedding control system, to ensure the effective execution of load shedding. The stepless load shedding mode means that the loss load on the grid side needs to correspond to the cut electrolytic aluminum load after the safety control calculation. When the single series single load shedding does not exceed 50%, any load value can be cut.
