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Operation of the gas system

The operation of the gas system is currently well secured. The storage capacity is sufficient. However, under the influence of significant changes in the Czech energy industry and under the influence of substitution of brown coal in all case studies there is a very significant increase in gas use. At the end of the long-term horizon in case of Renewable and Gas case studies there the increase is further affected by the fact that new or existing nuclear resources are no longer considered in the Czech Republic. Increase rate is a matter of energy choice of the mix (the share of RES in lignite substitute and possibly nuclear power) as well as the level of application austerity measures.

Medium term horizon

  • There will be an increase in gas volume transported between Gaspool and CEGH in Austria. On market’s demand, the company NET4GAS responds to projects called Capacity4Gas. Due to the increase transit through the Czech Republic will increase the utilization of the capacities of the northern and southern branches, which will, among other things, in increasing time of use of all compressor units. The TSO is therefore planning to change the machinery fleet practically at all compressor stations.
  • In the medium term, there is likely to be a significant increase in gas storage capacity because of connecting the UGS in Dolní Bojanovice to the Czech gas system. An increase in gas demand in this period is not very significant compared to later developments. Investing in another UGS capacity will not be needed.
  • Investments can be aimed at enhancing the efficiency of utilized capacities and increasing transmission capacities in order to diversify gas supplies to the Czech Republic and, in the case of the aforementioned situation in North Moravia, also to intrastate transmission capacities.
  • The development of gas consumption, independent of the case study, in Central Bohemia and around Prague will be more limiting the injection capacity to the UGS Háje.

Long term horizon

The outlook of the operation of the gas system in terms of ensuring the daily balances of demand and supply into the year 2050 characterize the following points:

  • In all case studies, daily consumption values will increase until 2050 (by 42% for Conceptual and Renewable case study; by 88% in the Gas case study).
  • The growth of both daily and annual consumption will be mainly due to higher use of gas in the monoproduction electricity and in CHP, especially in the case study Gas case study.
  • The use of gas in the production of power requires adequate development of the storage and withdrawal capacities, because the security of supply will influence the safety of power production, strongly in case of large power production from gas. Supply of power still has less possibility to be replaced.
  • In the Gas case study, the development of the storage capacity at the geological potential level was proposed in the Czech Republic (approximately 2,200 mcm of new capacities). This case study does not meet the requirement to the minimum capacity ratio of the UGS to the annual gas consumption to be 35%; the ratio is only 31% in 2050, as shown in the following figure.
  • The development of domestic UGSs is not the only option as to the flexibility and advancement of gas supplies ensure. It is possible to take ensuring of storage capacity abroad into consideration here it would be necessary to have a firmed fixed capacity on an interstate profile) or rely on the short-term gas market. Both ways present an increase in energy, and thus security dependence on foreign countries which is, in a situation where it will be gas routinely used for the power production and for the CHP, very risky. As well as providing operational flexibility and reserves for power system’s operation, in the case of the gas system, even in an investment-unstable environment, there is a high risk that flexibility and reserves will not be available in the whole EU.
  • In terms of capacities the transmission system will be very well dimensioned, once all development projects are realized, and it is able to meet an extreme domestic consumption that occurred in the Gas case study. An increase in domestic demand can significantly affect the transmission capacity of the system, especially in the direction towards Lanžhot and Poland.
  • For maximum security of supply of gas for new sources located in North Moravia, above all according to developments in the Gas case study, it would be necessary to further strengthen transport capacities for the region above framework of the planned Moravia gas pipeline. Failure of supply from DN 1000 in consideration would directly threaten the operation of power plants and so power production in the Czech Republic. The existing branch DN 700 would will not be able to meet the capacity needs of the source base in any of the case studies.
  • In Central Bohemia the development of the power system’s source base, the gas system is only able to meet its demand only in such a case that technical equipment at station in Hospozín will be adjusted to higher flows.

Ratio of storage capacities to consumption – with new capacities

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