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implement and test computation of ptdf
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| # Copyright (c) 2023, RTE (https://www.rte-france.com) | ||
| # See AUTHORS.txt | ||
| # This Source Code Form is subject to the terms of the Mozilla Public License, version 2.0. | ||
| # If a copy of the Mozilla Public License, version 2.0 was not distributed with this file, | ||
| # you can obtain one at http://mozilla.org/MPL/2.0/. | ||
| # SPDX-License-Identifier: MPL-2.0 | ||
| # This file is part of LightSim2grid, LightSim2grid implements a c++ backend targeting the Grid2Op platform. | ||
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| import unittest | ||
| import pandapower as pp | ||
| import pandapower.networks as pn | ||
| import numpy as np | ||
| import warnings | ||
| from scipy.sparse.linalg import spsolve | ||
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| from lightsim2grid.gridmodel import init | ||
| from lightsim2grid.solver import SolverType | ||
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| import pdb | ||
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| class TestCase14SLU(unittest.TestCase): | ||
| def make_grid(self): | ||
| case14 = pn.case14() | ||
| return case14 | ||
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| def get_solver_type(self): | ||
| return SolverType.DC | ||
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| def setUp(self) -> None: | ||
| self.case = self.make_grid() | ||
| with warnings.catch_warnings(): | ||
| warnings.filterwarnings("ignore") | ||
| self.gridmodel = init(self.case) | ||
| self.V_init = 1. * self.gridmodel.get_bus_vn_kv() | ||
| self.gridmodel.change_solver(self.get_solver_type()) | ||
| self.gridmodel.dc_pf(self.V_init, 1, 1e-8) | ||
| self.dcYbus = 1.0 * self.gridmodel.get_dcYbus() | ||
| self.dcSbus = 1.0 * self.gridmodel.get_dcSbus().real | ||
| self.Bbus = 1.0 * self.dcYbus.real | ||
| self.res_powerflow = 1.0 * np.concatenate((self.gridmodel.get_lineor_res()[0], self.gridmodel.get_trafohv_res()[0])) | ||
| self.nb = self.case.bus.shape[0] | ||
| self.nbr = self.case.line.shape[0] + self.case.trafo.shape[0] | ||
| self.slack_bus = self.case.ext_grid.iloc[0]["bus"] | ||
| self.noref = np.arange(1, self.nb) ## use bus 1 for voltage angle reference | ||
| self.noslack = np.flatnonzero(np.arange(self.nb) != self.slack_bus) | ||
| self.tol = 1e-6 | ||
| return super().setUp() | ||
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| def test_from_pp(self): | ||
| # test the right computation of Bf matrix (PTDF derived from python, might be slower) | ||
| Bf = 1.0 * self.gridmodel.get_Bf() | ||
| PTDF = np.zeros((self.nbr, self.nb)) | ||
| PTDF[:, self.noslack] = spsolve(self.Bbus[np.ix_(self.noslack, self.noref)].T, Bf[:, self.noref].toarray().T).T | ||
| # test the solver works correctly | ||
| tmp_mat = self.Bbus[np.ix_(self.noslack, self.noref)].T.todense() | ||
| for line_id in range(self.nbr): | ||
| solve_error = np.abs(np.dot(tmp_mat, PTDF[line_id, self.noslack]).T - Bf[line_id, self.noref].toarray().T).max() | ||
| assert solve_error <= self.tol, f"error for line {line_id}: {solve_error:.2e}MW" | ||
| # test powerflow are correct | ||
| res_ptdf = np.dot(PTDF, self.dcSbus * self.gridmodel.get_sn_mva()) | ||
| assert np.abs(res_ptdf - self.res_powerflow).max() <= self.tol, f"max error for powerflow: {np.abs(res_ptdf - self.res_powerflow).max():.2e}MW" | ||
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| def test_ptdf_from_ls(self): | ||
| # now test the right computation of the PTDF | ||
| Bf = 1.0 * self.gridmodel.get_Bf() | ||
| PTDF2 = 1.0 * self.gridmodel.get_ptdf() | ||
| # test the solver works correctly | ||
| tmp_mat = self.Bbus[np.ix_(self.noslack, self.noref)].T.todense() | ||
| for line_id in range(self.nbr): | ||
| solve_error = np.abs(np.dot(tmp_mat, PTDF2[line_id, self.noslack]).T - Bf[line_id, self.noref].toarray().T).max() | ||
| assert solve_error <= self.tol, f"error for line {line_id}: {solve_error:.2e}MW" | ||
| # test powerflow are correct | ||
| res_ptdf2 = np.dot(PTDF2, self.dcSbus * self.gridmodel.get_sn_mva()) | ||
| np.where(np.abs(res_ptdf2 - self.res_powerflow) >= 1e3) | ||
| assert np.abs(res_ptdf2 - self.res_powerflow).max() <= self.tol, f"max error for powerflow: {np.abs(res_ptdf2 - self.res_powerflow).max():.2e}MW" | ||
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| class TestCase30SLU(TestCase14SLU): | ||
| def make_grid(self): | ||
| res = pn.case30() | ||
| return res | ||
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| class TestCase118SLU(TestCase14SLU): | ||
| def make_grid(self): | ||
| res = pn.case118() | ||
| return res | ||
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| class TestCase14KLU(TestCase14SLU): | ||
| def get_solver_type(self): | ||
| return SolverType.KLUDC | ||
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| class TestCase30KLU(TestCase30SLU): | ||
| def get_solver_type(self): | ||
| return SolverType.KLUDC | ||
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| class TestCase118KLU(TestCase118SLU): | ||
| def get_solver_type(self): | ||
| return SolverType.KLUDC | ||
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| if __name__ == "__main__": | ||
| unittest.main() |
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