Remove duplicate matrix-based NR implementation from test suite by Copilot · Pull Request #370 · Sienna-Platform/PowerFlows.jl

Copilot · 2026-05-16T21:40:49Z

The test suite carried a second, matrix-based Newton-Raphson implementation (LUACPowerFlow in test/test_utils/legacy_pf.jl) used only as a benchmark, forcing maintenance of two NR code bases.

Changes

Deleted test/test_utils/legacy_pf.jl (244 lines: LUACPowerFlow, _legacy_dSbus_dV, _legacy_J, and the duplicate _newton_power_flow method).
PowerFlowsTests.jl: dropped the include and removed LUACPowerFlow from AC_SOLVERS_TO_TEST.
Dropped LU-specific testsets in test_psse_export.jl and test_power_flow_data.jl.
Restored cross-solver validation using TrustRegionACPowerFlow in the places where LUACPowerFlow was previously used as the comparator:
- test_multiperiod_ac_power_flow.jl: re-added the "compare results for different solvers" testset, now comparing TrustRegionACPowerFlow vs NewtonRaphsonACPowerFlow on bus magnitudes, angles, and arc active/reactive flows.
- test_solve_power_flow.jl "Compare larger grid…": renamed to "KLU vs NewtonRaphson vs TrustRegion" and added TrustRegion as a third comparator against the default (KLU) solver on the 2000-bus matpower system.
- test_solve_power_flow.jl "voltage_stability_factors": restored the voltage_stability_factors field equality check (TrustRegion vs NewtonRaphson) alongside the production-Jacobian / PROPACK SVD reference check.
Removed LUACPowerFlow skip/exclusion filters in test_distributed_slack.jl and test_lcc_ac_solver (no longer needed).

Refactored voltage_stability_factors test to source the Jacobian from the production path, eliminating the last consumers of _legacy_dSbus_dV / _legacy_J while preserving the PROPACK SVD reference check:

residual = PF.ACPowerFlowResidual(data_newton, time_step)
residual(PF.calculate_x0(data_newton, time_step), time_step)
J = PF.ACPowerFlowJacobian(residual, time_step); J(time_step)
rows, cols = PowerFlows._block_J_indices(pvpq, pq)
J_block = J.Jv[rows, cols]
# …PROPACK tsvd_irl(Gs) vs _singular_value_decomposition(J_block, npvpq)

Note on the linked PR #53 review comment

The referenced thread (r1942073313) was an informational note about gracefully skipping tests that depend on system_240[32].json when the file is absent. The current tree has no remaining references to system_240; that concern appears to have been resolved separately.

Agent-Logs-Url: https://github.com/Sienna-Platform/PowerFlows.jl/sessions/d6ca2f46-ff83-44a5-9c25-3679f1e99f81 Co-authored-by: jd-lara <16385323+jd-lara@users.noreply.github.com>

jd-lara

@copilot use TrustRegion in places where LUACPowerFlow was used for validation and later removed

github-actions · 2026-05-17T05:41:45Z

Performance Results

Precompile Time

Main	This Branch	Delta
2.604 s	2.642 s	+1.5%

Solve Time

Test	Main	This Branch	Delta
matpower_ACTIVSg10k_sys-NewtonRaphsonACPowerFlow First Solve	12.098 s	12.032 s	-0.5%
matpower_ACTIVSg10k_sys-NewtonRaphsonACPowerFlow Second Solve	92.3 ms	83.8 ms	-9.2%
matpower_ACTIVSg10k_sys-RobustHomotopyPowerFlow First Solve	17.881 s	16.799 s	-6.0%
matpower_ACTIVSg10k_sys-RobustHomotopyPowerFlow Second Solve	9.01 s	8.842 s	-1.9%
matpower_ACTIVSg10k_sys-ACRectangularPowerFlow{NR} First Solve	5.115 s	5.71 s	+11.6%
matpower_ACTIVSg10k_sys-ACRectangularPowerFlow{NR} Second Solve	557.2 ms	38.8 ms	-93.0%
matpower_ACTIVSg10k_sys-ACRectangularPowerFlow{NR}(iwamoto) First Solve	160.1 ms	229.2 ms	+43.1%
matpower_ACTIVSg10k_sys-ACRectangularPowerFlow{NR}(iwamoto) Second Solve	40.3 ms	39.3 ms	-2.6%
matpower_ACTIVSg10k_sys-ACRectangularPowerFlow{TR} First Solve	5.609 s	5.572 s	-0.7%
matpower_ACTIVSg10k_sys-ACRectangularPowerFlow{TR} Second Solve	41.2 ms	40.5 ms	-1.8%
matpower_ACTIVSg10k_sys-ACRectangularPowerFlow{TR}(iwamoto_fallback) First Solve	190.2 ms	160.3 ms	-15.7%
matpower_ACTIVSg10k_sys-ACRectangularPowerFlow{TR}(iwamoto_fallback) Second Solve	40.4 ms	133.0 ms	+229.0%
matpower_ACTIVSg10k_sys-NewtonRaphsonACPowerFlow(iwamoto) First Solve	200.4 ms	210.0 ms	+4.8%
matpower_ACTIVSg10k_sys-NewtonRaphsonACPowerFlow(iwamoto) Second Solve	82.3 ms	82.9 ms	+0.7%
matpower_ACTIVSg10k_sys-TrustRegionACPowerFlow(iwamoto) First Solve	1.746 s	1.74 s	-0.4%
matpower_ACTIVSg10k_sys-TrustRegionACPowerFlow(iwamoto) Second Solve	84.6 ms	90.2 ms	+6.6%
matpower_ACTIVSg10k_sys-DCPowerFlow First Solve	5.226 s	5.175 s	-1.0%
matpower_ACTIVSg10k_sys-DCPowerFlow Second Solve	15.1 ms	15.6 ms	+3.2%
matpower_ACTIVSg10k_sys-PTDFDCPowerFlow First Solve	1.885 s	1.843 s	-2.2%
matpower_ACTIVSg10k_sys-PTDFDCPowerFlow Second Solve	96.5 ms	70.9 ms	-26.6%
matpower_ACTIVSg10k_sys-vPTDFDCPowerFlow First Solve	5.548 s	5.463 s	-1.5%
matpower_ACTIVSg10k_sys-vPTDFDCPowerFlow Second Solve	4.03 s	3.425 s	-15.0%

Agent-Logs-Url: https://github.com/Sienna-Platform/PowerFlows.jl/sessions/e234fc62-7d8f-4670-b359-148fb2607001 Co-authored-by: jd-lara <16385323+jd-lara@users.noreply.github.com>

Copilot · 2026-05-17T05:42:31Z

@copilot use TrustRegion in places where LUACPowerFlow was used for validation and later removed

Done in cb98086. Restored cross-solver validation using TrustRegionACPowerFlow in:

test_multiperiod_ac_power_flow.jl: re-added the "compare results for different solvers" testset (TrustRegion vs NewtonRaphson).
test_solve_power_flow.jl "Compare larger grid…": added TrustRegion as a third comparator alongside default (KLU) and NewtonRaphson.
test_solve_power_flow.jl "voltage_stability_factors": restored the voltage_stability_factors field equality check (TrustRegion vs NewtonRaphson) on top of the production-Jacobian / PROPACK SVD reference.

All 11 affected tests pass.

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Refactor testing #90

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Remove legacy LU NR implementation from tests

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Copilot AI changed the title ~~[WIP] Refactor testing to remove inefficient NR implementation~~ Remove duplicate matrix-based NR implementation from test suite May 16, 2026

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Use TrustRegion as cross-solver validator in tests previously using LU

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jd-lara merged commit d428532 into main May 17, 2026
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hybrid cpb formulation #372

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Remove duplicate matrix-based NR implementation from test suite#370

Remove duplicate matrix-based NR implementation from test suite#370
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