 Reliable Heat Supply
 Reliable electricity supply
Accident rates of electro-technical equipment
Reliable Heat Supply
The reliable heat supply in many ways depends on the condition of the equipment of both the heat sources and the transfer grids, on the availability of the reserve of the heating capacity and the possibility of heat transfer directly to consumers. JSC "Tatenergo" has on its balance ten big sources of heat generation in the towns of Tatarstan Republic, including the trunk and distribution networks in three towns
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Balance of heating capacities of Co-generation plants and district boiler houses of JSC "Tatenergo" as at 01/01/2005
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Plants and District boiler houses (DBH
| Installed heating capacity as at the end of the year (Gcal/h) |
| Total
| Heat Extraction
| Production extraction
| Hot-water boilers
| Other sources
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| Kazan Co-generation Plant -1 |
744 |
110 |
534 |
100 |
0 |
| Kazan Co-generation Plant -2 |
821 |
204 |
257 |
360 |
0 |
| Kazan Co-generation Plant -3 |
1897 |
425 |
712 |
760 |
0 |
| DBH "Gorki-2" |
200 |
0 |
0 |
200 |
0 |
| DBH "Azino" |
360 |
0 |
0 |
360 |
0 |
| DBH "Savinovo" |
540 |
0 |
0 |
540 |
0 |
| Nizhnek.CGP#1 |
3885 |
668 |
2277 |
740 |
200 |
| Nizhnek.CGP#2 |
1945 |
220 |
1365 |
360 |
0 |
| NabChelny CGP |
4092 |
1696 |
356 |
2040 |
0 |
| Zainsk Condensation Plant |
100 |
0 |
100 |
0 |
0 |
| Urussu Condensation Plant |
127 |
84 |
43 |
0 |
0 |
| CGP of YelAZ |
420 |
0 |
0 |
420 |
0 |
- in Kazan – 29.535 km on platform – 100.515 km underground
- in Nizhnekamsk – 48.688 km on platform – 30.848 km underground
- in Naberezhnye Chelny – 31.666 km on platform – 171.656 km underground
To reliably supply heat to consumers in the towns of Kazan, Nizhnekamsk, Naberezhnye Chelny it is necessary to attract considerable funds for the reconstruction (replacement of the worn out pipelines and their removing from the aggressive environment) of the networks on the balance, including the networks without the owner. The total length of the networks amounts to 412.908 km, with heat output in 2004 amounting to 171.656 thousand Gcal. The accrued operating time of the facilities of JSC "Tatenergo" amounts to 70%.
To increase the reliability of the operation of the system for heat transportation it is necessary to hold the set hydraulic regime.
Not far ago the holding of the hydraulic regime was done through enhancing the administrative control.
In the present, the number of the consumers utilize the complex systems for automatic adjustment of consumption of the heat, which systems response to the minimal changes of the outside air temperature. These energy conservation systems are the course of the considerable fluctuations in the hydraulic regime of the grid, which may cause the break of the heating systems of the consumer. To exclude the violations of the hydraulic regime at the number of the Co-generation plants there was installed the system of the frequency-variable drive for the network pumps.
In future the following tasks will be implemented: to decrease the hydraulic losses in the networks and to increase their capacity, to which end it is necessary to build the new pump stations. On basis of the penalties it would be necessary to have all of the heat consumers to decrease the temperature of the reclaimed grid water, to bring order to not-accounted connection of the own plant needs of the Co-generation plants, to realize the protection of the heating grid from the excess pressure on both the direct and reclaimed network pipelines, including in the consumer grids.
The analysis of the data on the balance of the heating capacities reveals the necessity of input of the additional heating capacities in the District boiler house "Azino" and "Gorky-2", in which districts there is a big house construction under way.
In is planned in 2005 to finish the construction of the heat conductor-jumper between Kazan CGPl 1 and DBH "Azino" with the two pump stations on Tihomirov and Vishnevski streets. This would allow to increase the generation of electricity, to redistribute the heat loads between Kazan CGPl 1 and DBH "Azino" , to connect the consumers to the efficient boiler houses and supply them with the cheap energy.
The heat conductor on Baturin-B.Krasnaya-Teatralnaya sq. has been commissioned. In fiture it is planned to circle this heat conductor with heat conductor-jumper between Kazan CGPl 1 and DBH "Azino".
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To the aim of provision of reliable electricity to consumers and optimization of control over production costs the JSC "Network Company" in 2007 overhauled 27 substations of 35-220kV voltage. Were made repairs on the 58 transformers of 35-500 kV (≈7 % of operational transformer park ), including the non-regular overhaul with the recovery of the insulation characteristics of the transformer - reserve phase ÀÎDTN-167000/500 SS "Kinderi-500".
The regular overhaul of HL of 35-500kV voltage of total length 699 km was done. The 337km of deficient lightning protection cable were replaced and 101 deficient pole HL. In the distribution grids of 6-10/0.38kV voltage was done the overhaul of HL 0.38-6-10 kV of total length 1,597 km, including the replacement of 9,366 deficient poles. The 937 ÊTP, TP, RPÏ 6-10/0.4kV were repaired ; 1,230 cable lines of 0.38-10kV.
The "target" programs were implemented:
- "Recovery of systems of automatics of adjusting the voltage on the power transformers" on the 88 power transformers 110-220kV with revision of RPN drives and APN system recovery.
- "Recovery of high frequency protections of the system-making lines" with replacement and adjusting the 25 ÀVÀNÒ-R400 units on major lines 110-220kV.
- "Recovery of system pf metering with the purpose of realization of action plan for reduction of electricity losses" with repair of the cells and replacement of the measuring TT and ÒN.
- "Improving the parameters of technical condition of objects of distribution network".
According to capital construction plan for 2007 were reconstructed 5 substations with the highest voltage 110 kV. The reconstruction implied the replacement of OD, KZ 110 kV with the SF6 switches and replacement of the worn out MS with simultaneous replacement of the aged protection panels with electro-mechanical relays – with the microprocessor protections, increase of the transformer capacity. Also the seven 110 kV SF6 switches were installed.
The HL - 110 kV of length of 10.8km was reconstructed with the removal of the over sizing, lightning protection cable and poles. In the population settlements were reconstructed and built the HL 0.38-6-10 kV of total length of 507 km, including application of the 285 km of SIP.
Accident rates of electro-technical equipment
In 2007 in JSC "Network Company" no accidents were reported, compared to 2006 the accidents reduced by 10% (from 624 in 2006 to 560 in 2007).
At SS and HL 35 kV and higher were 140 accidents which constitutes 25% îf total number of accidents in 2007 in branches of JSC "Network Company".
Typical failures in operation of equipment at the substations of 35 kV and higher:
- 18 switches (2 because of fàilure of arc chutes, 2 because of fàilure of contacts, 2 because of fàilure of insulators);
- 14 KRU (13 with breakage of the support and bushing because of atmospheric impact and insulation aging); transformers (with no internal failures);
- 5 breakers ( 4 – with damage of support insulators because of atmospheric impact);
- 4 potential transformers (incl. 2 PT-35 kV because of long impact of one-phase dead grounds);
- 5 communication condensers (3 with damaged porcelain caps);
- 18 elements of protection relays and automatics (3 because of the software).
In distribution grids 6-10 kV were 420 accidents which constitutes 75% îf total number of accidents for 2007. Compared to 2006 the number of accidents in distribution grids 6-10 kV reduce by 13%.
Upon reduction of accidents in distribution grids 6-10 kV in part impacted the application of advanced technologies including:
1. Since 2004 JSC "Òàtenergo" strives to apply the SIP in distribution grids 0.4 kV. In total on balance of JSC "Network Company" as of 01/01/08 are 2,468.4 km of HL 0.38 kV. Expertise of operation HL – 0.4 kV proved the right course. Application of SIP allows to considerably enhance the reliability of electricity supply to consumers and reduce the operational costs. Total number of SIP at JSC "Network Company" is 8.8% îf total number of HL –0.38 kV.
2. In construction and reconstruction of girds for electricity supply to towns JSC "Network Company" extensively applies the unit transformer substations of voltage 6(10)/0.4 kV (BCSS-6(10)/0.4 kV). In total in branches of the JSC "Network Company" 47 units of BCSS are installed.
3.In 2003 started utilization in the networks of electricity supply to Republican consumers, first in the cable grids of the mega cities - Kazan and Naberezhnye Chelny, ànd later in each town of Republic of cables of voltage 6(10) kV with insulation from cross-linked polyethylene as well as thermal compressing cable couplings.
Application of insulated cables from cross-linked polyethylene and thermo- compressing couplings allows to reduce considerably the damageability of cable lines and enhance the electricity supply to consumers.
In total in JSC "Network Company" were built 148.7 km of cable lines with insulation of cross-linked polyethylene.
Due to coordinated work of staff of operational services of grid companies and implementation of the big and costly measurers, defined by the plans of overhauls and comprehensive repairs of electrical networks and plans of capital construction the significant claims with regard to dependability of electricity supply in 2007 from Republican consumers were not reported. The actions are planned to control the quality of the electricity and preparations for its certification.
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Rus
Reliable operation
Safe operation