Purpose of the excitation control cabinet SHUV-2K for RDES NPP
The excitation control cabinet of the SHUV-2K series, manufactured by Energocomplekt JSC, is designed to supply automatically controlled current to the excitation windings of electric and brushless diesel generators operating as part of standby diesel power plants (RDES) at nuclear power plants (NPPs), in all operating modes.
The cabinet performs all the functions of excitation control, protection and alarm about the state of the excitation system. The structure of the SHUV-2K includes two identical automatic excitation regulators of the AVR series, providing 100% “hot” reserve for power and control.
The automatic excitation regulator AVR has been tested on the electrodynamic model of OJSC "NIIPT", St. Petersburg, and has an expert opinion on the possibility of using generators of any power.
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Appearance of the SHUV-2K cabinet with 100% reserve
cabinet is standardly manufactured in the climatic version of UHL and category 4 placement with the following climatic factors:
- ambient temperature from +1 to +40 °C;
- height above sea level up to 1000 m;
- relative humidity not more than 80% at a temperature of +25 ° C.
According to the operating conditions in terms of mechanical factors, the Shuv-2K has a mechanical group M39 according to GOST 17516.1-90, while the acceleration of vibration of the floor of the room should not be more than 2.5 m / s2 at frequencies in the range from 0.5 to 100 Hz, the degree of rigidity is 8. The degree of protection of the cabinet is IP41 or 54 according to GOST 14254-96. The seam has seismic resistance up to 6 points on the MSK-64 scale according to GOST 17516.1-90.
Upon request, the ISS cabinet can be manufactured in other climatic and mechanical groups.
SHUV-2K provides
- operation of generators in modes: initial excitation, idling, inclusion in the network by methods of accurate synchronization and self-synchronization, network work or autonomous load;
- the initial excitation of the generator to a voltage of at least 95% of the nominal for a time of not more than 10 seconds, provided that the generator has set a speed of at least 90% by this time;
- 100% “hot” reserve for power and control;
- stable maintenance of voltage idling and under load according to GOST 14965-80 and GOSTR 50783-95;
- possibility to enable parallel work with the network by the method of exact synchronization;
- long-term parallel operation of the generator with the network;
- operation of the generator in all operating modes within the nominal load and with permissible overloads in accordance with GOST 14965-80 and the generator load schedule;
- forcing excitation when reducing the voltage at the generator clamps by 5% or more relative to the given static characteristic (inclination of the static characteristic 3.6%), as well as at K.Z. according to GOST 14965-80;
- extinguishing the generator field by extinguishing the exciter field during normal and emergency stop (under the action of excitation system protections and by ACS signal);
- remote control of the generator voltage;
- protection from malfunctions in the excitation system;
- blocking part of the protection by the signal "Standard launch".
- independence of voltage at the outputs of the generator in idling mode when the frequency changes from 47 to 52 Hz;
- automatic restriction of the excitation current when a two-fold value of the generator rotor current is reached;
- limiting the excitation current of the exciter by time-dependent characteristic in accordance with the data on generator overload;
- limiting the minimum excitation current to a value that does not allow the generator to enter the deep reactive power consumption mode;
- stable distribution of reactive power without the use of group regulation or cross-leveling links between several simultaneously switched on at the level of generator voltage, the same type of generators of comparable power;
- unloading the generator on reactive power and disconnecting it from the network.
Composition
The SHUV-2K is a structurally finished unit, which includes two microprocessor automatic excitation regulators of the AVR series identical in scheme and design, as well as the necessary switching, protective and control and measuring equipment.
Basic technical data
| Name of the parameter | Meaning |
| Nominal rectified current, A | 4 - 100 |
| Nominal rectified voltage, B | 36 - 250 |
| Multiplicity of forcing by the excitation current of the exciter, o.e., at least | 3 |
| Duration of overload at double current, with | 60 |
| Nominal power supply voltage of the power module, not more, B | 440 |
| Power module voltage frequency, Hz | 25-100 |
| Power supply voltage of control equipment, B | = 120 - 375 |
| Power consumption of power control equipment for food, W, no more | 400 |
| Nominal voltage of stator voltage measurement circuits, B | 105 |
| Power consumption from measuring current and voltage transformers per phase, VA, no more | 2 |
The company performs supervision installation, adjustment and testing of excitation systems, warranty and post-warranty maintenance, modernization and repair of excitation systems of machines in operation, training of service personnel, technical consultations on the choice of excitation systems equipment. Delivery of equipment is carried out within 3 months from the date of conclusion of the contract and prepayment.