Non-Wires Alternatives Modeling
Non-wires alternatives modeling evaluates whether demand-side programs, managed EV charging, DER, home batteries, or VPP strategies can reduce local grid stress or system peak demand before utilities commit to conventional infrastructure upgrades.
What Non-Wires Alternatives Need to Prove
A non-wires alternative must be location-specific, hour-specific, and reliable enough to address the planning need. Generic DSM savings are not enough. Utilities need to know whether a program reduces the specific peak hours and local loads that create the constraint.
DSM, DER, Managed Charging, and VPP Scenarios
The Grid Impact Model (GIM) evaluates alternative participation and dispatch assumptions for managed EV charging, DSM programs, DER, home battery storage, and VPP strategies. These scenarios can be tested against baseline and future load growth cases to estimate how much local or coincident peak reduction is realistically available.
- Managed EV charging impacts
- DSM program load-shape changes
- Home battery and DER dispatch assumptions
- VPP participation and event strategies
- Local and system peak reduction comparisons
Screening Before Detailed Engineering
GIM is not a substitute for final engineering review. Its value is upstream screening: identifying where non-wires alternatives are worth closer evaluation, which customer groups matter, and which hours drive the need for mitigation.
Capital Deferral and Risk Management
By comparing baseline and mitigation scenarios, utilities can evaluate whether customer-side resources can defer upgrades, reduce wholesale or coincident peak exposure, and improve reliability planning. The strongest cases are usually where local constraints and system peak benefits align.
Frequently Asked Questions
What is a non-wires alternative?
A non-wires alternative is a demand-side or distributed resource solution that can defer, reduce, or complement conventional grid investments such as feeder, transformer, or substation upgrades.
How can managed EV charging support non-wires alternatives?
Managed EV charging can shift charging away from constrained local peak hours or coincident system peak periods, reducing stress without eliminating customer charging needs.
How does GIM evaluate VPP strategies?
GIM tests participation and dispatch scenarios for batteries, DER, DSM, and EV charging to estimate local and system peak reductions under alternative program designs.
Is NWA modeling a replacement for engineering studies?
No. NWA modeling is best used as screening and scenario analysis before detailed engineering review, power-flow modeling, or program implementation decisions.