North Central Wisconsin
Zone 1
Transmission system limitations in Zone 1
Zone 1 has a few key system performance issues. High voltages may occur in the northern portion of the zone under system intact and contingent system conditions. Potential overloads and low voltages resulting from multiple contingency planning events will continue to be monitored. The most severe limitations are expected during both peak and off-peak periods.
Electricity usage
Peak electric demand typically occurs during the summer months, with some winter peaks appearing in the northern portion of the zone. Primary electricity users in Zone 1 include several large paper mills and food processing plants.
Electric load is forecasted to grow approximately 0.2 percent annually through 2033.
Transmission projects in Zone 1
The most notable planned, proposed, and provisional network/asset-renewal projects in Zone 1, are listed below – along with their projected year of completion and the factors driving the need for the projects.
Zone 1 includes the counties of:
- Adams , Wis.
- Fond du Lac (NW) , Wis.
- Forest (SW) , Wis.
- Green Lake , Wis.
- Juneau , Wis.
- Langlade , Wis.
- Lincoln , Wis.
- Marathon , Wis.
- Marquette , Wis.
- Monroe (E) , Wis.
- Oneida , Wis.
- Portage , Wis.
- Shawano (W) , Wis.
- Vernon (E) , Wis.
- Vilas (S) , Wis.
- Washara , Wis.
- Waupaca , Wis.
- Winnebago (W) , Wis.
- Wood , Wis.
Zone 1 Planned Projects
| Project Description | Project # | In-service year | Need driver |
|---|---|---|---|
| Waupaca Area Energy Storage Project | 1 | 2025 | Operational Flexibility |
| McKenna – Castle Rock 69-kV line (Y-47), Rebuild | 2 | 2025 | Condition and Performance |
| Groenier – Rosholt (ALTE) Tap 69-kV (Y-71), Partial Rebuild and Rerate | 3 | 2025 | Condition and Performance |
| J732 Superior SS Generator Interconnection and Network Upgrades | 4 | 2026 | G-T Interconnection |
| Rocky Run SS T1 Transformer Replacement | 5 | 2027 | Reliability |
| Northern Adams County Area Network Improvement Project | 6 | 2027 | Reliability / T-D Interconnection |
| North Central WI Reliability Project | 7 | 2028 | Reliability |
Zone 1 Proposed Projects
| Project Description | Project # | In-service year | Need driver |
|---|---|---|---|
| Pittsville Area Reliability Project | 8 | 2028 | Reliability / T-D Interconnection |
| Birnamwood Area Reliability Project | 9 | 2028 | Reliability |
| Grid Forward Central Wisconsin (MISO LRTP Tranche 1 Project 6) | 10 | 2030 | Regional reliability |
Zone 1 Provisional Projects
| Project Description | Project # | In-service year | Need driver |
|---|---|---|---|
| N/A |