Flexible connections

 

Sometimes in order to connect further demand or generation customers onto our network, we need to make changes to our assets to ensure that they do not exceed safe operating limits. 

Our unconstrained offers can be more expensive because they are more likely to need extra assets to be installed (ie. network reinforcement) to allow unconditional import or export. They can also have longer lead times based on the time it takes to reinforce the network prior to your connection. 

What is a flexible connection?

A flexible connection is defined as one that has constraints associated with the terms of connection. These constraints may relate to time limits or system abnormalities.

Flexible connections can offer an enduring solution for accommodating a new connection without the need to reinforce our network, but they can also be used temporarily whilst awaiting the completion of the network changes necessary to allow unconstrained operation.

We currently offer the following types of flexible connection:

System Normal Connection - A system normal connection is disconnected or constrained when there is a First Circuit Outage affecting the circuit dedicated to supplying the customer or the local Distribution System. This connection could be managed either remotely or via an intertripping scheme.

Export Limited Connection - A connection where the installed generation equipment has a greater export capability than that which has been agreed to be exported onto the Electricity North West distribution system.

Import Limited Connection - A connection where the installed equipment has a greater import capability than that which has been agreed to be imported from the Electricity North West distribution system.

We are in the process of implementing our new Network Management System which will allow us to offer the following additional flexible connection options:

Timed Connection - A connection arrangement where connection capacity is subject to restrictions within specific time periods.

Active Network Management - Use of control systems to modify import and/or export in line with previous agreed limits.

If you accept a flexible connection offer, your asset may be constrained up to an agreed limit under certain conditions, ie when the network is operating ‘abnormally’.  The conditions of the constraint and level of constraint will be set out in your offer letter.

To progress with an alternative connection offer, you will need to make sure you are able to control your asset in response to the constraint conditions within your offer.

How do I switch from a flexible connection to a firm connection or increase my security of supply?

We understand that flexible connections are not suitable for all customers’ requirements and that sometimes people may want to adjust the terms of their agreements. In the majority of cases a flexible connection will have been offered in order to prevent network reinforcement or at the request of the original applicant. In order to modify the terms of the agreement it is generally necessary to carry out a connections study to determine the impacts of the change to the network. These changes may incur costs and there may be restrictions on when the changes can be made, depending upon the scale of any network constraints identified.

If you would like to speak to us about modifying your existing connection please contact: connectionapplications@enwl.co.uk. 

ANM Constraint Management Zones

We are carrying out a phased rollout of our Active Network Management System, responding to the needs of our customers. We will publish details of Planned and Active constraint management zones as we progress through this phased rollout.

Contract Management Zone	Voltages Covered	Status	Target go live date	Rational/ Need case	Number of actively managed distributed energy resources within zone	Capacity of distributed energy resources actively managed within zone
Wrightington BSP	33kV	Planned	Q1 2024	Flexible Connection – Demand Constraint	1	30MW
Penwortham West GSP -Stanah GSP	132kV	Planned	Q1 2024	Flexible Connection – Demand Constraint	1	30MW