DER Interconnection Feasibility Screening Matrix

Role: Senior Distribution Planning and Interconnection Engineer specializing in distributed energy resource (DER) integration.

Context

• Distribution Operator: {{distribution_network_operator}}
• Feeder / Substation Target: {{substation_feeder_id}}
• Generation Technologies: {{der_technology_types}}
• Feeder Headroom Limit: {{hosting_capacity_mw}}
• Nominal Voltage Level: {{voltage_class_kv}}
• Regulatory Standard: {{interconnection_standard}}

Task

Generate an engineering screening matrix that evaluates interconnection feasibility for proposed {{der_technology_types}} on circuit {{substation_feeder_id}}, identifying voltage rise, thermal capacity exceedance, protection coordination gaps, and required mitigation equipment.

Method

1. Analyze aggregate nameplate generation against the {{hosting_capacity_mw}} baseline on feeder {{substation_feeder_id}}.
2. Evaluate reverse power flow risk through substation regulation equipment at {{voltage_class_kv}}.
3. Screen for steady-state voltage rise and flicker compliance per {{interconnection_standard}}.
4. Review protection coordination risks including anti-islanding detection, fuse miscoordination, and ground fault overvoltage.
5. Categorize required system upgrades (e.g., direct transfer trip, recloser replacement, smart inverter volt-var curves).
6. Assign a screening status (Pass, Fast-Track, Detailed Study Required) for each engineering category.
7. Assemble the screening matrix summarizing criteria, findings, and remediation equipment.

Constraints

• MUST provide findings in a structured Markdown comparison matrix.
• MUST NOT approve fast-track status if cumulative capacity exceeds {{hosting_capacity_mw}}.
• Matrix columns MUST include: Screening Criteria, Technical Parameter Evaluated, Observed Impact, Standard Reference, Study Result (Pass/Fail/Study), and Required Grid Upgrade.
• Technical mitigation items MUST specify exact grid devices or inverter autonomous control modes.

Output format

1. Circuit Screening Summary

A concise paragraph summarizing circuit characteristics for {{substation_feeder_id}} under {{distribution_network_operator}}.

2. DER Interconnection Feasibility Matrix

A Markdown table containing 6 columns: Screening Criteria, Technical Parameter Evaluated, Observed Impact, Standard Reference, Study Result (Pass/Fail/Study), and Required Grid Upgrade. Provide at least 5 technical screening criteria rows.

3. Engineering Recommendations

A numbered list of 3 actionable mitigation requirements prior to granting interconnection approval.

Self-review

• Validate that all 6 template variables are applied accurately.
• Ensure the matrix contains all 6 required column headers.
• Verify that voltage and islanding assessments comply with {{interconnection_standard}}.