Safa (Synchronous Area Framework Agreement) Annex Policy on Load-Frequency and Reserves

TenneT uses regulatory and reserve requirements provided by market participants to maintain balance. In addition, TenneT can use mFRRda or Incident Reserves to maintain balance in the event of significant long-term incidents and performance gaps. For more information about the Reserve Power for Other Purposes product, see the following documents. TenneT performs redispatching when transport problems arise for which the solution is envisaged, namely the relocation of production. Because it is important to know how much of the high-voltage network more or less energy needs to be injected, contact with the connected parts in the problem area is first sought. For this reason, single bilateral agreements for reshipment are concluded with these parties. There is therefore no standard procedure in this regard. The subdivision of frR into aFRR and mFRRda is carried out in accordance with the Continental Europe Operations Manual, Policy 1. The guideline describes a method for determining the minimum required volume of RFFr.

TenneT can increase this minimum by an additional volume if necessary. This additional volume is based, among other things, on historical accounting quality. For 2019, the frequency distortion of the Netherlands is 3.7%. This means that a failure of 1000 MW somewhere in the synchronous range should result in a Dutch FCR contribution of 37 MW. Since the total baseline incident is 3000 MW, TenneT must have 111 MW (3.7% of 3000 MW) of FCR capacity available at all times, both up and down. Here is a table with the minimum dimension of aFRR. The quantities actually contracted may differ to contract the best economic combination of reserves. The distribution of the total volume of RCFs among individual TSOs is based on the net production and consumption of their control area divided by the sum of the net production and consumption of the total synchronous area over a year. The result is expressed as a percentage and is called frequency distortion. During the consultation period, a stakeholder workshop will take place in Brussels on 13 April 2018, for registration and more details click here. Supply processEmergency energy is outsourced by TenneT to suppliers.

The supplier of the incident reserve is obliged to be able to purchase or deliver the agreed electricity from the Dutch grid at tenneT`s request for the duration of the contract. Emergency power will be purchased weekly and daily from 1 September 2020. Learn more about the mFRRda product, and then read the following documents. FCR (primary reserve power) is the power that is activated under the control of the primary control. The main controller is a locally designed automatic device that ensures a constant ratio between the frequency change and the installation change (performance) within a maximum of 30 seconds. The goal of FCR is to stabilize frequency interference throughout the (internationally) connected high-voltage network, regardless of the cause and location of the interference. Strong frequency interference can lead to automatic load shedding and, in the worst case, a power outage. The rules of the ENTSO stipulate that the TSO must have a certain volume of FCR.

This volume is determined annually by the ENTSO-e. On the basis of this obligation, TenneT obtains FCR. The TSO shall ensure sufficient regulation of the voltage of the high-voltage network. To this end, TenneT requires a reactive energy supplier to supply or absorb reactive power at the point of connection to the grid at a level that deviates from the standard exchange of 0 Mvar. The method of determining volumes is prescribed by European law. The main aspects can be found in: ENTSO-E consulted on the proposed synchronous undertaking agreement in order to obtain stakeholder feedback on the proposal and to meet the requirements of Article 11 of Regulation (EU) 2017/1485 (SO GL). . International and national law prescribes the conditions under which an ancillary benefit is compulsory or voluntary and whether or not it is to be paid.

In addition, users of transmission and distribution systems are required by law to comply with the requirements of the TSO and/or DSO for these services (including the financial settlement of the imbalance with the TSO). TenneT regularly procures many necessary ancillary services on the market. More information on the procurement process can be found on this page. TenneT procurement process can enter into contracts with generator sets connected to the EHV (380 kV / 220 kV) or HV (150 kV / 110 kV) network, which provide TenneT with the reactive power range of each contractually agreed production unit. These contracts may be valid for a certain period, but also for a specific situation. Contracts are concluded on the basis of the result of an annual call for tenders. This consultation concerns the proposal of the continental European TSOs for the Operational Agreement on Charging Frequency Regimes and Reserves, prepared in accordance with Article 118 of Commission Regulation (EU) 2017/1485 of 2 August 2017 establishing a Guideline for the Operation of the Electricity Transmission System (SO GL). Procurement Process “Reserve authority for other purposes” companies may submit bids to TenneT. With the exception of the approval period, these submissions may be adjusted to 3 Program Time Units (PTUs) prior to the start of the PTU. The FrR volume is based, among other things, on the historical imbalance values and the magnitude of a reference incident, i.e. the largest imbalance that can result from an immediate change in the active power of a single power generation module, a single demand plant or a single HVDC interconnection, or from the triggering of an ALTERNATING current line within the LFC block.

In accordance with Paragraph 188(3) of the GL, TenneT is required to publish the reserve capacity outlook before 30 November each year. To do this, the perspectives were included in the sizing process, which takes place every 6 months. The outlook for 2022 is as follows: Procurement processIn order to ensure that there are sufficient offers from the regulatory authority or the aFRR at all times, TenneT enters into capacity contracts in which suppliers commit to submit bids for a certain period of time. To this end, TenneT organises a weekly call for tenders and, from 1 September 2020, a daily call for tenders. To learn more about these tenders and the aFRR product, read the following documents. Note to the table: The figures for 07.01.2022 – 31.12.2022 are forecasts and therefore indicative and cannot be derived from any right. . .

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