Complete set of defense transformers 110 kV on differential, controlled from distance and current principle

The complete set of defense can consist of one or a few microprocessor devices and must realize next functions:

 

· differential defense of transformer;

· controlled from distance defense with independent areas and rebuilding from loading;

· protecting from a thermal overload;

· differential current defense of a zero sequence;

· maximal current defense (on complete currents and currents of a zero sequence);

· current pinch-off (on complete currents and currents of a zero sequence);

· automatic control tension of transformer;

· control of the second chains of tension;

· control of the second current chains;

· amount groups of setpoints – not less than 4th;

· synchronization of time-signals;;

· free-programmable logic;

· internal recorder of events;

· oscillographic testing;

· energyindependent memory;

· measurings: currents, tensions, frequency, power;

· self-diagnostic of device;

· liquid-crystal screen on a front panel;

· user-programmable light-emitting-diode indicators for signaling;

· signaling about the state and functioning of device;

· support of protocol of MEK 61850, and presence of standard international protocols of exchange by information for integration in ACS;

· front port of Ethernet (Rs232) for connection with a device;

· back port with an optical fibre ethernet-interface for connection with ACS substations;

 

 

Complete set of differential defense of tires 330 kV and 110 kV

Functional requirements:

 

· differential current protection with braking;

· three-phase created with two-zone differential protection;

· choice of the protection zone based on the position of the auxiliary contacts high-voltage apparatus;

· sensitive organ differential protection;

· control algorithm protection zones;

· two options to monitor the situation isolator / switch;

· fixing algorithm incorporating the measured current connection to the zone A (B);

· merger of the two areas into one in the "fixing broken" connection or, if necessary, (regardless of the position of disconnectors);

· selective disconnection of the differential busbar protection switches related area;

· functional testing circuits TT incoming connections;

· Blocking protection with fault circuits;

· Reserve non-directional overcurrent protection;

· Three-phase and phase-segregated breaker failure start, the control current position of the auxiliary contacts switch or adaptive combination of the two signs;

· free-programmable logic;

· amount groups of setpoints – not less than 4th;

· signaling about the state and functioning of device;

· self-diagnostic of device;

· internal recorder of events;

· oscillographic testing;

· energyindependent memory;

· liquid-crystal screen on a front panel;

· displayed on the screen information about the status of switching devices connection;

· user-programmable light-emitting-diode indicators for signaling;

· support of protocol of MEK 61850, and presence of standard international protocols of exchange by information for integration in ACS;

· front port of Ethernet (Rs232) for connection with a device;

· back port with an optical fibre ethernet-interface for connection with ACS substations;

 

 

Complete set of differential defense bus arrangement 330 kV and 110 kV

Functional requirements:

 

· differential current defense with braking;

· three-phase execution with two areas of differential defense;

· choice of area of defense on the basis of position of block-contacts of high-voltage vehicles;

· sensible organ of differential defense;

· algorithm of control area defense;

· two variants of monitoring position of disconnector/switch;

· algorithm of fixing of including of the measured current of joining in an area A (B);

· association of two areas in one, in the mode of the «broken fixing» of joining or in the case of necessity (regardless of position disconnector);

· selective disconnecting from differential defense of tires switches, connected with damage area;

· control of good condition chains of TC (transformer of current) of the incoming joinings;

· blocking of defense at the disrepair of chains of current;

· reserve nondirectional maximal current defense;

· Phase and three-phase starting DBRS, with control of current, positions of block-contacts of switch or adaptive combination of these two signs;

· free-programmable logic;

· amount groups of setpoints – not less than 4th;

· synchronization from the outsourcing of exact time;

· self-diagnostic of device;

· internal recorder of events;

· oscillographic testing;

· energyindependent memory;

· liquid-crystal screen on a front panel;

· state information represented on the screen of device interconnect vehicles of joining;

· user-programmable light-emitting-diode indicators for signaling;

· support of protocol of MEK 61850, and presence of standard international protocols of exchange by information for integration in ACS;

· front port of Ethernet (Rs232) for connection with a device;

· back port with an optical fibre ethernet-interface for connection with ACS substations;

 

 

Complete set for adjusting and verification equipment of relay protection and special automatic

Microprocessor device for verification equipment RP and SA must provide possibility and target at implementation of technical service and editing-adjusting works of all microproc and electro mechanics devices of RPA (relay protection automatic) on SS-330 kV.

 

Configuring and tuning settings of microprocessor devices RP and SA must be carried out by a notebook with the special software (given Contractor in the complete set of delivery). The required parameters of notebook are resulted in the table of technical information.

 

Verification of devices RP and SA

 

For providing verification of capacity equipment, implementations of adjustings works and further technical maintenance of all microprocessor and electromechanics devices RP and SA on SS-330 kV in the process of exploitation, Contractor must give Customer a complete verification device.

 

A verification complete set must consist of:

 

· microprocessor device of verification of equipment RP and SA;

· managing device on the base of notebook with the special software.

 

Microprocessor device verification equipment RP and SA must have a complete package of the specialized software, necessary for verification of all types devices, and also necessary for this purpose accessories.

 

A management a verification device must be carried out from the personal computer (notebook), manned for this purpose necessary software and by accessories. Must be provided:

• Possibility of work with primary sizes for verification basic and reserved protection;
• possibility of work on verification functions of DPD (different phase defense),MCD (maximal current defense), DD (distance defense);
• possibility to work with RIO by files;
• support of format СОMTRADE.

 

Proof-of-concept complex for verification HF apparatuses

 

Trier for a generation test HF signals of tensions, analogical to those which act on an entrance HF defense and HF automations.

 

In retrograde through a device computer information must enter about a reaction HF devices on these test influences.

 

A complex must allow automatically to take off descriptions, design protocols of tests.

A proof-of-concept complex must execute generator and sensory functions for co-operating with checked up HF by an equipment.

HF generator (frequency 24. 2500 kHz), R out = 0; 75; 150 Ohm;

LF generator (frequency is 20 Hertzs. 24 khz);

Source of control current (0. 250 V=, 10 W);

HF and LF generators change frequency (in relation to set) both by (through virtual devices with a necessary step) hand and automatically.

The results of measurings must be designed as charts and tables, in form standard protocols and at pleasure to be accessible for unsealing on a printer.

Software must function in the environment of MICROSOFT WINDOWS XP / 7 or higher software providing must function in the environment of MICROSOFT WINDOWS XP / 7 or higher.

 

Low-voltage complete devices (LCD). Closets with the microprocessor terminals of defense

Requirements to execution

 

Climatic execution and category of placing of UKHl4 for GOST 15150-89 and GOST 15543.1-89. Degrees of defense of Ip40 on MEK 529 (GOST 14254-80).

 

LCD must be protected from electromagnetic hindrances, conditioned an origin s.c (shorting circuit).The corps of closets must be grounded..

 

Requirements on safety

 

Requirement to technique safety must correspond GOST 12.2.007.0-75, GOST 12.1.004-91 and to the requirements of RSEI (rules of setting electrical installation).

 

Structural requirements

 

A closet with a transparent front and steel postern must have sizes 2200x800x800 (HxWxD).

 

A closet must be equipped all wiring, terminals, relay, by lamps et al needed by accessories, subject approval by Customer.

 

Electric descriptions

 

Electric descriptions of closets must correspond GOST 22789-94.

 

Thus nominal parameters must have next values:

· operative current - permanent;

· nominal tension of chains control current - 220 V;

· working turn-down tension of chains control current - from 0,8 to 1,1 U of nohm;

· nominal tension of the second chains variable tension - 100 V, (50 Hertz’s);

· nominal current of the second chains of alternating current – 1A or 5 A in depending on the transformer of current (50 Hertz’s);

· nominal tension of auxiliary chains - 380/220 V, 50 Hertz’s.