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Merge pull request #28 from sogno-platform/villas-import
The villas import didn't work for powerflow simulations with PQ loads due to two reasons: The SP load didn't use the P and Q attributes internally so that it didn't matter if they pointed to the attributes used by the villas import. The villas import tasks was dropped by the scheduler since the task system is not fully developed for the PF solver yet. Both issues have been fixed in this PR.
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‎Examples/Python/Shmem/test_shmem_import_export.py

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Original file line numberDiff line numberDiff line change
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# This example reads a sine signal from villas that modifies the active power set point
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# of the PQ load. The n2 voltage is exported to a file via villas.
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import sys
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import os.path
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import logging
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import json
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from datetime import datetime
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from villas.node.node import Node as VILLASnode
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import dpsimpy
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import dpsimpyvillas
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base = os.path.splitext(os.path.basename(sys.argv[0]))[0]
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log = logging.getLogger(base)
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def villas(intf):
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log_filename=datetime.now().strftime(f'{base}-villas-%y-%m-%d_%H_%M_%S.log')
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nodes = {
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'dpsim1': intf.get_config(),
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'file1': {
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'type': 'file',
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'uri': f'{base}-results-%y-%m-%d_%H_%M_%S.csv'
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},
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'sine' : {
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'type': 'signal',
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'signal': 'sine',
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'rate': 1,
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'frequency': 0.1,
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'amplitude': 50000,
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'offset': 100000
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},
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}
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paths = [
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{
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'in': 'dpsim1',
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'out': 'file1'
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},
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{
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'in': 'sine',
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'out': 'dpsim1',
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'hooks': [{'type':'print'}]
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}
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]
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config = {
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'nodes': nodes,
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'paths': paths
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}
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config['nodes']['dpsim1']['out']['hooks'] = [{'type':'print'}]
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log.info('VILLASnode config: \n%s', json.dumps(config, indent=2))
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return VILLASnode(config=config, log_filename=log_filename)
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def dpsim():
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# Parameters
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V_nom = 20e3
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p_load_nom = 100e3
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q_load_nom = 50e3
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line_resistance = 0.05
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line_inductance = 0.1
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line_capacitance = 0.1e-6
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name = 'test_shmem_import_export'
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# Nodes and Components
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n1 = dpsimpy.sp.SimNode('n1', dpsimpy.PhaseType.Single)
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n2 = dpsimpy.sp.SimNode('n2', dpsimpy.PhaseType.Single)
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extnet = dpsimpy.sp.ph1.NetworkInjection('Slack')
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extnet.set_parameters(voltage_set_point=V_nom)
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extnet.set_base_voltage(V_nom)
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extnet.modify_power_flow_bus_type(dpsimpy.PowerflowBusType.VD)
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line = dpsimpy.sp.ph1.PiLine('PiLine')
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line.set_parameters(R=line_resistance, L=line_inductance, C=line_capacitance)
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line.set_base_voltage(V_nom)
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load = dpsimpy.sp.ph1.Load('Load')
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load.set_parameters(active_power=p_load_nom, reactive_power=q_load_nom, nominal_voltage=V_nom)
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load.modify_power_flow_bus_type(dpsimpy.PowerflowBusType.PQ)
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extnet.connect([n1])
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line.connect([n1, n2])
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load.connect([n2])
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system = dpsimpy.SystemTopology(50, [n1, n2], [extnet, line, load])
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sim = dpsimpy.RealTimeSimulation(name, dpsimpy.LogLevel.debug)
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sim.set_system(system)
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sim.set_domain(dpsimpy.Domain.SP)
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sim.set_solver(dpsimpy.Solver.NRP)
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sim.set_time_step(1)
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sim.set_final_time(10)
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sim.do_init_from_nodes_and_terminals(False)
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logger = dpsimpy.Logger(name)
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sim.add_logger(logger)
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sim.log_attr('n1', 'v')
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sim.log_attr('n2', 'v')
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intf = dpsimpyvillas.InterfaceShmem()
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sim.add_interface(intf)
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sim.import_attr('Load', 'P', 0)
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sim.export_attr('n2', 'v', 0, dpsimpy.AttrModifier.mag)
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return sim, intf
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def test_shmem_import_export():
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logging.basicConfig(format='[%(asctime)s %(name)s %(levelname)s] %(message)s', datefmt='%H:%M:%S', level=logging.INFO)
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sim, intf = dpsim()
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node = villas(intf)
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node.start()
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sim.run(1)
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node.stop()
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if __name__ == '__main__':
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test_shmem_import_export()

‎models/Source/SP/SP_Ph1_Load.cpp

Lines changed: 8 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -56,8 +56,8 @@ void SP::Ph1::Load::calculatePerUnitParameters(Real baseApparentPower, Real base
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mBaseOmega = baseOmega;
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mSLog->info("Base Power={} [VA] Base Omega={} [1/s]", mBaseApparentPower, mBaseOmega);
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mActivePowerPerUnit = mActivePower/mBaseApparentPower;
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mReactivePowerPerUnit = mReactivePower/mBaseApparentPower;
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mActivePowerPerUnit = attribute<Real>("P")->get()/mBaseApparentPower;
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mReactivePowerPerUnit = attribute<Real>("Q")->get()/mBaseApparentPower;
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mSLog->info("Active Power={} [pu] Reactive Power={} [pu]", mActivePowerPerUnit, mReactivePowerPerUnit);
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mSLog->flush();
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}
@@ -108,8 +108,8 @@ void SP::Ph1::Load::initializeFromNodesAndTerminals(Real frequency) {
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}
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// instantiate subResistor for active power consumption
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if (mActivePower != 0) {
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mResistance = std::pow(mNomVoltage, 2) / mActivePower;
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if (attribute<Real>("P")->get() != 0) {
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mResistance = std::pow(mNomVoltage, 2) / attribute<Real>("P")->get();
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mConductance = 1.0 / mResistance;
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mSubResistor = std::make_shared<SP::Ph1::Resistor>(mUID + "_res", mName + "_res", Logger::Level::off);
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mSubResistor->setParameters(mResistance);
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mSubResistor->initializeFromNodesAndTerminals(frequency);
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}
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if (mReactivePower != 0)
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mReactance = std::pow(mNomVoltage, 2) / mReactivePower;
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if (attribute<Real>("Q")->get() != 0)
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mReactance = std::pow(mNomVoltage, 2) / attribute<Real>("Q")->get();
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else
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mReactance = 0;
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}
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mIntfVoltage(0, 0) = mTerminals[0]->initialSingleVoltage();
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mIntfCurrent(0, 0) = std::conj(Complex(mActivePower, mReactivePower) / mIntfVoltage(0, 0));
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mIntfCurrent(0, 0) = std::conj(Complex(attribute<Real>("P")->get(), attribute<Real>("Q")->get()) / mIntfVoltage(0, 0));
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mSLog->info(
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"\n--- Initialization from powerflow ---"
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Logger::phasorToString(initialSingleVoltage(0)));
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mSLog->info(
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"Updated parameters according to powerflow:\n"
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"Active Power={} [W] Reactive Power={} [VAr]", mActivePower, mReactivePower);
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"Active Power={} [W] Reactive Power={} [VAr]", attribute<Real>("P")->get(), attribute<Real>("Q")->get());
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mSLog->flush();
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}
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