Grid Connection Strategy

In Romania and Poland the binding constraint on a utility-scale project is no longer land, equipment or capital. It is the interconnection: whether capacity exists at the point you want it, whether your claim on it survives the new auction regimes, and what it costs to hold that claim while the project is built. A connection strategy answers those questions before the money is committed, and puts the answer in a form the network operator can act on.

Siting and configuration against transmission constraint

The best resource and the available network capacity are rarely in the same place. In Romania the only two zones with genuine headroom are inland and hilly, while the coast and the lower Danube carry roughly six times their available capacity in prior claims — the full picture is in our zone-by-zone table. A siting decision made on irradiance or wind speed alone is made on half the information.

• Zone-level capacity screening: available connection capacity read against the pipeline already holding a claim on the same wires, zone by zone, before a site is secured rather than after. Source data is published by Transelectrica.
• Distribution versus transmission entry: the 110 kV route set against a direct transmission connection — reinforcement cost, study timeline, curtailment exposure, and which party carries each.
• Configuration against the export limit: sizing the AC block, the storage duration and the dispatch strategy against what the connection will actually accept, rather than against installed DC capacity.

Queue position, and what it is actually worth

An undersubscribed auction is not the same as an open network. The competition for a given zone is the queue already standing in front of you — connection contracts signed, permits issued, solution studies under way — most of it established under first-come-first-served and ahead of anything filed now by date rather than by merit.

• Prior-claim mapping: what sits ahead of your position in your zone, on what basis it was established, and how much of it is more likely to lapse than to proceed.
• Auction arithmetic: the Romanian participation guarantee of EUR 20,000 per MW requested, set against the probability of clearing in that specific zone and against the cost of not bidding at all. The procedure and its annexes are published by Transelectrica.
• Allocation-year sequencing: capacity offered for 2030 is lower than for 2026 in seven of Romania’s ten zones. Treating a later allocation year as the safe fallback is wrong in most of the country, and portfolio sequencing has to reflect that.

The technical argument put in front of the network operator

Connection is granted against a study, not against a business plan. The quality of the submission decides how long it sits in the queue and how much network reinforcement is attributed to it.

• Compliance case under EN 50549-1 and EN 50549-2: voltage and frequency ride-through, reactive capability, active power control and protection coordination, argued at the level the operator’s own study will test.
• Grid-forming and system-service capability: where storage is offered as part of the answer to the constraint rather than an addition to it — inertia response, voltage support, and the constraint relief the operator can count in its own planning.
• Study-ready documentation: short-circuit contribution, reactive capability curves, protection settings and simulation models delivered in the format the operator requires, so that the study starts rather than returns.

Guarantees, milestones and the calendar that governs them

Both markets attached money and deadlines to capacity in the same year, and those dates run from your own filings rather than from the generic calendar in circulation.

• Total exposure map: the permit guarantee, the authorisation guarantee and the auction participation guarantee, separated into what is genuinely forfeitable and what is merely posted.
• Milestone calendar from your dates: every deadline counted from the dates on your documents, including the single extension available and the events that trigger forfeiture.
• The parallel Polish regime: an advance payment doubled from 30 to 60 zloty per kW, with milestones that void the connection agreement automatically rather than on notice. The same instrument as Romania’s, with different arithmetic.

What the engagement produces

A written connection strategy with every assumption stated: the recommended connection point and voltage level, the queue position it inherits, the guarantee exposure it creates, and the dates that govern it. Where the conclusion is that a position is not worth holding, the document says so and explains why.

The practice has developed 5.28 GWh of storage on Duke Energy Progress corridors carrying a $238 million upgrade estimate, and taken a project from siting through to a signed interconnection agreement.

Related work

For a single connection you already hold, the fixed-scope Grid Position Review answers the same questions for a fixed fee in two to three working days. If the documents rather than the connection are the problem, see Pre-Submission Technical Review.