Interconnection Queues And Why Projects Wait

Building a wind or solar farm is frequently faster than obtaining permission to connect it to the grid. The delay comes from how connection requests are assessed.

Every connection changes the network

Adding generation at a point alters power flows across a wide area, potentially overloading lines that were previously within limits.

The operator must therefore study each request to determine what upgrades it requires, and those studies are detailed engineering work rather than paperwork.

The applicant pays for whatever reinforcement is attributed to their project, which makes the outcome of the study commercially decisive.

Requests interact with one another

Because each study assumes the projects ahead in the queue will be built, a withdrawal changes the results for everyone behind it.

Restudying then becomes necessary, which delays the whole queue, and a further withdrawal triggered by the new costs can restart the cycle.

This cascading dependency is the main reason queues have grown from months to years in several systems simultaneously.

Speculative applications inflate the queue

Where entering the queue is cheap, developers submit multiple applications for sites they may never build, holding positions while assessing options.

The operator cannot easily distinguish serious projects from placeholders, so all must be studied, consuming the same scarce analytical capacity.

Reforms typically raise deposits and impose milestones, which filters applications at the cost of disadvantaging smaller developers.

Processing projects in groups helps

Studying a batch of applications together rather than sequentially removes the dependency chain, since all are assessed against the same assumptions.

Costs for shared upgrades can then be allocated across the group, which is fairer than assigning the full cost to whichever project happened to trigger it.

The trade-off is that a project ready early must wait for its cluster, so speed for the system comes at some cost to individuals.

The physical work is the ultimate limit

Even with perfect administration, the reinforcements identified must actually be built, which requires equipment, land rights and construction crews.

Transformers and cables have long manufacturing lead times, and consenting a new line can take longer than building it.

Queue reform therefore accelerates decisions rather than delivery, and the constraint moves to the supply chain rather than disappearing. Manufacturing capacity for large transformers expanded slowly for decades and is now being asked to grow quickly.

Some systems have responded by offering connections on flexible terms, allowing a project to connect sooner on the condition that its output is curtailed during periods when the network cannot carry it.