# AC Optimal Power Flow in Various Nonlinear Optimization Frameworks

**URL:** https://discourse.julialang.org/t/ac-optimal-power-flow-in-various-nonlinear-optimization-frameworks/78486
**Category:** Optimization (Mathematical)
**Tags:** optimization, nonlinear
**Created:** [March 25, 2022, 6:25pm UTC](https://discourse.julialang.org/t/ac-optimal-power-flow-in-various-nonlinear-optimization-frameworks/78486 "2022-03-25T18:25:05Z")
**Posts on this page:** 1
**Showing post:** 2

<div class="post-metadata">

### Author: ![mohamed82008](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mohamed82008/32/18171_2.png) [@mohamed82008](https://discourse.julialang.org/u/mohamed82008)
#### Post date: [March 25, 2022, 8:36pm UTC](https://discourse.julialang.org/t/ac-optimal-power-flow-in-various-nonlinear-optimization-frameworks/78486/2 "2022-03-25T20:36:23Z")

</div>

> [@ccoffrin](#):
>
> it reports 0 terms in the Jacobian and Hessian

You forgot to add constraints 🙂 I will look into the Zygote issue. Nonconvex uses l-BFGS Ipopt by default which explains the Hessian.

---

_[View the full topic](https://discourse.julialang.org/t/ac-optimal-power-flow-in-various-nonlinear-optimization-frameworks/78486)._