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PLUTON Group
Rectifiers for electrolysis, electrotechnology and electrothermics
Main specific features
Functions of rectifiers:
- power supply of electrolysis units for electrowinning of non-ferrous metals from melts (aluminum, magnesium) and solutions (zinc, copper, nickel, sodium, cadmium, lead, manganese, water etc.);
- power supply of electrolysis units for gas production (chlorine, fluorine);
- power supply of electro-graphitization furnaces;
- similar loads with necessity of high operating currents.
Main components of rectifier unit:
- transformer part;
- converter part;
- heat exchanger;
- DC disconnectors;
- current meters;
- auxiliaries auto-reclose cabinet;
- remote control panel for one or several rectifiers.
Rectifier circuit:
- bridge (B);
- «Y — reverse Y with paralleling reactor» (N). Control of output current under load — OLTC, thyristor control angle
high power characteristics
high measuring accuracy of heavy current
high installation and commissioning readiness
Centralized control and diagnostics
Benefits:
- high power characteristics (efficiency, cos φ) in combination with the possibility of smooth-step current control;
- high accuracy of heavy currents measurement up to 0,1%;
- centralized control and diagnostics using modern microprocessor systems and industrial computers, automatic generation of reporting documents and protocols;
- process control optimization;
- high installation and commissioning readiness;
- minimal impact on supply network when running several rectifiers due to the use of multi-pulse rectifying circuits and phase-rotation devices and compensation winding built into power transformer.
Application fields:
- nonferrous metallurgy;
- chemical industry.
Converting part includes:
- power converting sections (rectifier units);
- control system.
Power converting sections are made with bridge or neutral rectification circuit with an equal number of bridges and transformer secondary windings connected into Y and delta to increase pulse number.
Applied power semiconductors: thermodynamic diodes (thyristors) of TDC type, without plasma emission. Devices are connected into parallel arms, which number is determined by the rectifier output current.
Control system is a two-level software and hardware system:
- rectifier control system controllers (control cabinet);
- remote control panel for a group of rectifiers (functions of process controller and operator interface);
- analog remote control panel (operator interface functions).
Control system functions:
- current setup and regulation;
- protection and signaling;
- current and voltage monitoring;
- HV circuit breaker closing/opening;
- automatic and manual control of transformer OLTC and NLTC;
- processing of information from transformer monitoring cabinet;
- control of DC disconnectors;
- data reception and transmission from control cabinet to remote control panel.
Remote control panel functions:
- generation of commands for the rectifier switching on/off;
- current setting for each rectifier;
- signals processing and receiving from each rectifier of the group;
- alarms, warnings archives creation;
- current on load graphs making;
- rectifiers current and voltage data array formation;
- current and voltage average values archiving;
- data transfer to process automatic control system database via any of the following networks: Profibus-DР, Ethernet, Modbus, САN or other;
- equipment operation charts and graphs displaying and printing.
Design:
- for indoor installation — indoors;
- for outdoor installation — modular (container).
Technical parameters
Technical parameters for electrolysis, electrotechnology and electrothermicsDocuments
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PLUTON Polska Sp. Z o.o.
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