110/35 kV compact transformer substations
110/35 kV modular transformer substations are intended for receiving, converting, distributing and transit of 3-phase AC power (50 Hz) at rated voltages 110 (35) kV
Compact modular transformer substations are designed for outdoor installation at a height of no more than 1000 m above sea level and for operation in conditions corresponding to the N, F and NF climate versions of placement category I according to GOST 15150-69 and GOST 15543.1-89 and in an atmosphere of type II according to GOST 15150-69 with insulation of high-voltage devices of category II* according to GOST 9920-89 and in the IV climatic zone for wind and ice according to the "Rules for Electrical Installation Mounting".
Operational state group for compact modular transformer substation - M6 according to GOST 17516.1-90, seismic resistance - under any seismic impact of earthquakes up to 9 points on the MSK 64 scale inclusive at the level of 0-10 m according to GOST 17516.1-90.
Detailed information
The main technical parameters of 110/35 kV compact transformer substations
| Parameter name | Parameter value | ||
| CTS 110 | CTS 35 | ||
| Maximum power, kV·A, no more | 63000 | 63000 | |
| Number of power transformers | 1, 2 | ||
| Specific area, m2/(kV·a), no more | 0,020 | 0,044 | |
| Specific gravity, kg/(kV·A), no more | 0,496 | 1,030 | |
| Assembly factor, no less | 0,78 | 0,7 | |
| Side ВН | |||
| Rated voltage, kV | 110 | 35 | |
| Highest operating voltage, kV | 123 | 40,5 | |
| Rated current of main circuits, A | 630, 1000, 2000 | ||
| Rated current of busbars, A | 630, 1000, 2000 | ||
| Busbar electrodynamic resistance current, kA | 80; 100; 125 | 50; 63; 80 | |
| Thermal resistance current of the busbar for 3s, kA | 25; 31,5; 40; 50 | 20; 25; 31,5 | |
| Type of current of auxiliary circuits | Variable, constant | ||
| Rated voltage of auxiliary circuits, V | 380±19; 220±11 | ||
| AC frequency of auxiliary circuits, Hz | 50 | ||
| Insulation resistance, MOhm | 500 | ||
| Leakage distance along external insulation, cm/kV | not less than 2,25 | ||
| I/O execution | air | ||
| Side НН | |||
| Switchgear type | Complete switchgear | ||
| Rated voltage, kV | 6; 10 | ||
| Highest operating voltage, kV | 7,2; 12 | ||
| AC frequency of main circuits, Hz | 50 | ||
| Rated current of main circuits, A | 400; 630; 1000; 1250; 1600; 2000; 2500; 3150 | ||
| Rated current of busbars, A | 400; 630; 1000; 1250; 1600; 2000; 2500; 3150 | ||
| Thermal resistance current for 3 s, Ik, kA | 20; 31,5; 40 | ||
| Rated breaking current of the circuit breaker, kA | 12,5; 20; 25; 31,5; 40 | ||
| Rated current of electrodynamic resistance of main circuits, kA | 32; 51; 64; 81; 102 | ||
| Rated current of electrodynamic resistance of the circuit breaker, kA | 32; 51; 64; 80; 102 | ||
| Rated power of dry transformers for auxiliary needs, kVA | 40 4) | ||
| No-load current of dry transformers for own needs, A no more at voltage | 6 kV | 0,4 | |
| 10 kV | 0,6 | ||
| Electrodynamic resistance current of the busbar system and switchgear power circuits (amplitude), kA, not less | 2,5Iк | ||
| Thermal resistance current flow time, s | 3 | ||
| I/O execution | aerial, cable | ||
| Exceeding the heating temperature of the switchgear elements accessible to touch above the ambient temperature, °C, no more | 30 | ||
| Time to localize an open electric arc within a cabinet or installation unit, s, no more | 0,2 | ||
| Type of current of auxiliary circuits | variable, constant | ||
| Rated voltage of auxiliary circuits, V | 380±19; 220±11 | ||
| AC frequency of auxiliary circuits, Hz | 50 | ||
| Insulation resistance, MOhm | 500 | ||
| 1) At the customer's request, transformers with other winding connections can be supplied, 2) If there are elements in the auxiliary circuit circuit whose test voltage is below 2 kV, turn off the latter for the duration of the tests. After the tests, connect the above-mentioned elements and their circuits according to the diagrams and carry out a voltage test that these elements allow, 3) It is possible to install an auxiliary transformer with a higher power, determined in the design documentation. | |||
CTS classification
CTS are classified:
a) according to the rated voltage of RU HV, RU SN (if available) and RU LV (if available);
b) by place and method of connection:
- dead-end/branch - connected to one or more power lines/to branches from one or more power lines, through the HV switchgear of which transit power flow is not normally carried out;
- walk-through - connected to one power transmission line with two-way power supply, through the HV switchgear of which transit power flows;
- nodal - connected to three or more power lines, for which the operating mode of the HV switchgear is provided with transit power flow between the supply power lines;
c) by service method:
- without permanent operational staff;
- with permanent operational staff;
d) according to the type of busbar for RU VN:
- tough;
- flexible;
- combined.
Assignment Requirements
Complete transformer block substations for voltages of 35 and 110 kV must be provided with:
- reception, conversion, distribution and transit of electrical energy of three-phase alternating current of industrial frequency 50 Hz at rated voltages of 110 and 35 kV;
- parallel operation of power transformers;
- compatibility of design solutions using commercially produced equipment with standard and unified connection and fastening units;
- operational layout, installation, adjustment and commissioning at the customer’s site;
- interchangeability and maintainability.
Implementator
SHIELD Engineering and manufacturing complex
The manufacturing division performs a complete cycle from welding metal structures for modular enclosures to turn-key ready equipping. The workshops are equipped with state-of-the-art multifunctional manufacturing equipment: automated laser cutting machines,…
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