REACTIVE POWER SERVICE Clause Samples
The Reactive Power Service clause defines the obligations and terms under which a party provides or receives reactive power support to maintain voltage levels within an electrical grid. Typically, this clause outlines the technical requirements, compensation mechanisms, and performance standards for supplying or absorbing reactive power, which may involve generators or other equipment. Its core function is to ensure grid stability and reliability by clearly allocating responsibility for voltage control and compensating parties for their role in supporting the system.
REACTIVE POWER SERVICE. The Reactive Power service relates to the reactive power generated or absorbed by the participating DER plant. This production/absorption of reactive power could allow more effective control of the voltage in the transmission system. The Reactive service is initiated by the DERMS issuing instructions to DER at the start of each Service Window for which DER was contracted, to change its operating mode (where necessary): for a non-synchronous contracted DER unit, to operate in voltage droop control mode; or for a synchronous contracted DER unit, to operate in voltage control mode When in these control modes, DER will automatically respond to voltage changes measured at the DER Connection Point. In addition to this, a National Grid instruction via the DERMS would translate into a change of DER voltage set-point to achieve National Grid’s request. In either case, the response would be achieved within 2-5 seconds, as per service requirements. Otherwise, the DER would be kept operating at their default operating level and the DERMS would adjust DER voltage set-points if needed to keep a unit’s reactive power output as close to its default value as possible.
REACTIVE POWER SERVICE. 3.3.1 Wave 1 participation
REACTIVE POWER SERVICE. In order to achieve these objectives, the Reactive Service component of the trial will be split into three “waves”. Before participating in the waves, Participants must complete a Mandatory Technical Trial (see section 3.3.
1.1 Eligibility and timings). Wave 1 is predominantly aiming to trial the technical aspects of the Power Potential services and, through the trial, to allow participants to recover most of their upgrade costs. The Wave 1 Trial is split to allow technical trials that cover a range of network configurations and operating conditions. Before participating in the Wave 1 trial, Participants must complete a Mandatory Technical Trial. Wave 2 introduces competitive bidding between DER, with the volumes accepted by National Grid in line with actual system need, although volumes procured will not be used to secure the system. Wave 3 brings DER into competition with other market-based options available to National Grid. Only DER that are as cost-effective as other options will be accepted. DER will be competing with transmission-connected assets where multiple parties at multiple connection levels can fulfil a requirement. National Grid is entitled to secure the system using DER services during this wave. Reactive Service payments for DER will include: Participation Payments (linked to overall availability in Wave 1 of the trials), and Market Revenues (from payments for availability and utilisation during Waves 2 and 3). An overview of the key features of each Reactive Power trial wave is as follows: 1 Project budget Up to [£45,000] per site, linked to availability1 No payments No payments 2 Project budget N/A Driven by market bids Driven by market bids 3 National Grid budget N/A Assessed in line with other market based options 1 See section 3.3.1 for details of the availability assessment
REACTIVE POWER SERVICE. Ahead of time a DER submits a PQ capability chart (either upon commissioning or subsequently updated) indicating, for a given active power output (expressed in MW), the range of reactive power that is made available (expressed in MVar,) and when the reactive power service is offered
REACTIVE POWER SERVICE. 6.1. UKPN may monitor the performance of the DER Unit using the DERMS Monitoring: 6.
1.1. if the DER Unit is included in the Production Schedule, to determine whether it is
REACTIVE POWER SERVICE. UKPN may monitor the performance of the DER Unit using the DERMS Monitoring: if the DER Unit has had an accepted Availability offer for the current Settlement Period, to determine whether it is Available; and if a Voltage Arming Instruction and (where applicable) a Voltage Set Point Instruction has been issued in respect of the DER Unit, to determine the level of Reactive Power Response delivered. The Parties confirm that the level of Availability shall be specified in the Power Potential Tender or shall otherwise be the Availability offered by the Provider in Wave 1, and shall be verified through the DERMS Monitoring.
REACTIVE POWER SERVICE. 5.1. During Wave 1 UKPN shall notify the Provider of any changes to the timings of the Mandatory Technical Trial Windows and Optional Technical Trial Windows that it subsequently requires on not less than [ ] days’ notice prior to the Trading Day on and from which such changes are to take effect;
5.2. During Wave 2 and Wave 3 UKPN shall notify the Provider:
5.2.1. of the number of Service Windows on each Trading Day and their respective start and finish times that it initially requires for the purposes of the Power Potential Services by not later than [ ] days prior to the Actual Trial Commencement Date; and
5.2.2. of any changes to the timings of the Service Windows that it subsequently requires during the Trial Period on not less than [ ] days’ notice prior to the Trading Day on and from which such changes are to take effect.
5.3. The Provider shall:
5.3.1. throughout the Trial Period notify UKPN (through the DERMS Interface) of its expected output levels in MW for each Notified Settlement Period by not later than [16.00] for the next Trading Day;
5.3.2. during Wave 2 and Wave 3, and provided that a Power Potential Auction has been initiated for the following day, notify UKPN (through the DERMS Interface) by not later than [16.00] on each day for each Service Window of notified prices for Reactive Power Availability and Reactive Power Utilisation for each DER Unit, in accordance with the Market Procedures.
5.4. UKPN shall:
5.4.1. during Wave 2 and Wave 3, notify the Provider each day (through DERMS) for each Service Window on the next Trading Day by not later than [17.00] of its accepted Reactive Availability Windows in accordance with the Market Procedures (the ‘Production Schedule’).
5.5. UKPN shall be entitled to modify requests for Reactive Power Availability (through the DERMS Interface) at any time before the Trading Day commences. The Production Schedule for a Trading Day will become fixed at commencement of that Trading Day or at such earlier time as UKPN may notify to the Provider.
5.6. UKPN may issue an instruction (“Reactive Power Arming Instruction”) (through the DERMS Interface) to the Provider to deliver Reactive Power Response if the DER Unit has been specified in the Production Schedule for a Trading Day by not later than [2] minutes before the relevant Service Window opens.
5.7. Following receipt of a Reactive Power Instruction from UKPN under clause 5.6, the Provider shall deliver the Reactive Power Response according to that Instructio...