def METHOD_NAME(net):
    for delta in [1e-5, 1e-6, 1e-7, 1e-8, 1e-9, 1e-10, 1e-11, 1e-12]:
        try:
            pp.runopp(net, delta=delta)
            return delta
        except pp.OPFNotConverged:
            continue
    return 1e-10