Static exciter EX-SR with touch control panel

The appointment of a static exciter EX-SR

The exciters of the EX-SR series are manufactured by Energocomplekt JSC and are designed to supply the excitation windings of synchronous motors and compensators with automatically controlled current in all operating modes.

The exciters of the EX-SR series can be used to replace static exciters with analog control of the TE8, BTU, BVU, TV, TV2, TPE10, TPE series, as well as in the modernization of engines and compensators with electric excitation systems, as well as electric motors of compressors, mills and other objects with heavy starting torque. At the same time, the implementation of the required functions of management and regulation of excitation is carried out programmatically.

A number of nominal values of exciter currents according to GOST 24688-81 (200, 250, 315, 400, 500, 630, 800, 1000 A, etc.).

A number of nominal values of exciter stresses according to GOST 24688-81 (36, 48, 60, 75, 115, 150, 230, 300, 345, 460, 600 V).

EX-SR-XR-XK is fully digitally controlled, can be used in automated manufacturing, controlled and monitored by a higher-level control system. The EX-SR-XR-XK can be supplied complete with a transformer TSZP.

Basic technical data and characteristics

EX-SR exciters

Composition of the exciter

As part of a static exciter EX-SR include the following devices:

• microprocessor control module (2 sets of main and backup);
• matching converters of current and stator voltage signals (2 sets of main and backup);
• controlled thyristor rectifier (1 channel);
• automatic switch;
• launch resistance;
• thyristor discharger with control unit;
• trigger-chain current sensor;
• sensor panel of the operator with display of the technical condition of the product;
• matching relay block;
• control bodies of the exciter (control keys).

Energocomplekt JSC ensures a complete production cycle at the production sites of its enterprises and has comprehensive solutions for the delivery of equipment to the final Customer.

All the main components, thyristor converters, microprocessor regulators and transformers of the TSZP are manufactured at the production sites of Energocomplekt JSC.

The microprocessor module of the exciter control is manufactured by the specialists of Energocomplekt JSC based on the ADSP-2181 signal processor and the ST10F269 microcontroller. The signal processor performs the basic control and regulation program, and the microcontroller exchanges information with the signal processor and the control panel (touch panel), as well as performs service programs.

Structurally, the equipment of the exciter is located in the execution cabinet IP23 (IP54, IP44) GOST 14254, equipped with a fan. The measurement, control and indication organs are located on the cabinet door. Power chains of control of the exciter from the network of own needs.

• the power part of the excitation regulator consists of controlled three-phase thyriston rectifiers, the scheme of which provides for the possibility of working in both bridge and zero straightening schemes. Switching between operating modes is made automatically depending on the required excitation currents and engine operating modes;
• power supply of the power part of the excitation regulator is carried out from the industrial network of three-phase voltage with a frequency of 50 Hz and a voltage of 380 V through a matching transformer, the secondary windings of which are assembled into a "star" with zero output;
• the exciter contains two completely identical, independent, galvanically unleashed excitation regulators, which provide the possibility of automatic (in case of malfunction) and manual switching between these blocks during motor operation;
• the exciter ensures the maintenance of a protocol of events, in which all the main events within the regulator are recorded, as well as the day, month and time, with the accuracy to the seconds when they occurred;
• the exciter provides automatic supply of excitation current with short-term forcing in the rotor slip function and in the stator current function;
• the exciter provides automatic and manual modes of control of the excitation current in the range 0.2 - 1.4 of the rated excitation current of the engine;
• in the automatic control mode, the regulator controls the excitation current according to a complex algorithm, which includes control of the stator voltage, rotor current, full and reactive stator current, with the choice of their optimal combination at each time;
• the exciter provides damping of the rotor field when the engine is turned off by transferring the thyristor rectifier to the inverter mode;
• the control unit of the digital exciter automatically calculates all installations, guided by the nominal parameters of the engine, as well as the transformation coefficient of the measuring current transformer and the inclination coefficient of the code-current characteristic, to simplify the adjustment and adjustment process.
• the exciter is equipped with a system of self-control and control of readiness to start the engine, with the issuance of appropriate signals to the external terminal and indication on the touch panel;
• the exciter automatically turns off the engine in case of the following emergency situations: exceeding the temperature of thyristors, and if the temperature inside the cabinet of the exciter exceeds, it includes cooling ventilation:
• the exciter has protection against partial short circuit of the rotor of the synchronous motor and is equipped with a standard rotor isolation control system;
• for event logging, the thyristor exciter is equipped with an oscillographing unit, which has an interface RS485, Modbus and four channels for transmitting basic parameters in the 4-20 mA standard. Unloading data from the oscillographing unit is performed without the participation of additional peripheral devices on the Flash-USB carrier.

The exciters are designed for prolonged work in a closed room under the following conditions:

• height above sea level up to 1000 m; at altitudes above these, the permissible current decreases by 1.2 % for every 100 m of added height;
• ambient temperature 0 - +40°C;
• влажность воздуха от 5 % до 85 %, от 1 г/м? до 25 г/м? без конденсации влаги или обледенения (3К3 класс по EN 50178);
• air pressure from 86 kPa to 106 kPa (3K3 class according to EN 50178);

RELIABILITY OF EQUIPMENT

• the exciter must remain operable when the supply voltage changes in the range of 0.6 - 1.3 of the nominal value;
• the mode of operation of the regulator of excitation should be continuous, without limitation of time;
• service life of at least 15 years;
• average operating time for failure is at least 50,000 hours.

GUARANTEE OBLIGATIONS

Warranty period for digital excitation regulator, layout units and parts after acceptance into operation 2 years.

WORKING PRINCIPLE

The static exciter of the EX-SR series is manufactured by Energocomplekt JSC and is designed to supply automatically regulated current to the excitation windings of synchronous motors. The exciters of the EX-SR series form the output voltage and current, which is supplied to the excitation winding of the synchronous electric motor by means of a thyristor transducer, which is controlled by a microprocessor regulator.

The power part of the thyristor converter provides for the possibility of working in both bridge and zero straightening schemes. Switching between operating modes is made automatically depending on the required excitation currents and engine operating modes.

The power part of the excitation regulator is powered by an industrial three-phase voltage network with a frequency of 50 Hz and a voltage of 380 V through a matching transformer, the secondary windings of which are assembled into a “star” with zero output.

The static exciter comprises two completely identical, independent, galvanically decoupled excitation regulators that enable automatic (in case of malfunction) and manual switching between these units during motor operation. At the same time, the thyristor converter converts the 3-phase network into a constant voltage.

The thyristor bridge is assembled as a three-phase rectifier on thyristors according to the Larionov scheme. 3. The voltage was removed by the FLUK190 oscilloscope through a measuring current transformer. The converter is designed for full input output current and voltage. As a rule, in the nominal mode, the static exciter operates in the “zero circuit”.

Each controller includes a central microprocessor module, an analog signal converter module, a discrete input/output module located in a separate screening section, on the door of which there is a touch panel. Touch panel displays all technical information about the product.

The use of the touch panel can significantly reduce the number of controls and make work with the product convenient and affordable. Touch panel allows for multi-level access for operational services and engineering staff, thus ensuring reliability in operation and ease of maintenance.

Touchbar (6 inches) has an operator menu of 15 screens, through which you can quickly monitor any EX-SR node and obtain performance values in real time. The control system has a log of 150 events, each of which records more than 80 parameters of the state of the system at the emergency moment (currents, voltages, active / reactive power, positions of discrete inputs / outputs, values of coefficients, etc.).

The use of a microprocessor control system with galvanic decoupling, a touch panel that determines the level of access of personnel, as well as the use of low-voltage power modules in the assembly allows you to manufacture an EX-SR corresponding to a high technical level, provide increased reliability and convenient maintenance.

EX-SR-2R-1K-320-115UXL4. The main screen of the touch panel. Information on the monitor displays the active channel of the regulator

EX-SR-2R-1K-320-115UXL4. Touch panel screen. Monitor.

EX-SR-2R-1K-320-115UXL4. Touch panel screen. Journal of events

EX-SR-2R-1K-320-115UXL4. Touch panel screen. Service

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