losses

[Marcos Ruy Soares Gaudio]

how do i get the total losses of an IEEE 123 bus network? and how do you calculate the losses across the network

[Marcos Ruy Soares Gaudio]

import py_dss_interface

dss = py_dss_interface.DSSDLL(r"C:\Program Files\OpenDSS")
dss_file = r"C:\Program Files\OpenDSS\IEEETestCases\123Bus\IEEE123Master.dss"
dss.text("compile [{}]".format(dss_file))

dss.text("solve")

dss.text("show losses")
losses_text = dss.text("show losses")
total_losses = None

for line in losses_text.split("\n"):
if line.startswith("Total Losses"):
total_losses = float(line.split(":")[1].strip().split()[0])
break

if total_losses is not None:

print("Perdas Totais: {:.2f} kW".format(total_losses))



lines = dss.lines_all_names()
line_losses = {}
for line in lines:
    dss.text("select line {}".format(line))
    losses_text = dss.text("show losses")
    losses = float(losses_text.split(":")[1].strip().split()[0])
    line_losses[line] = losses


transformers = dss.transformers_all_Names()
transformer_losses = {}
for transformer in transformers:
    dss.text("select transformer {}".format(transformer))
    losses_text = dss.text("show losses")
    losses = float(losses_text.split(":")[1].strip().split()[0])
    transformer_losses[transformer] = losses


generators = dss.generators_all_names()
generator_losses = {}
for generator in generators:
    dss.text("select generator {}".format(generator))
    losses_text = dss.text("show losses")
    losses = float(losses_text.split(":")[1].strip().split()[0])
    generator_losses[generator] = losses


print("Perdas das Linhas:")
for line, losses in line_losses.items():
    print(f"  {line}: {losses:.2f} kW")

print("Perdas dos Transformadores:")
for transformer, losses in transformer_losses.items():
    print(f"  {transformer}: {losses:.2f} kW")

print("Perdas dos Geradores:")
for generator, losses in generator_losses.items():
    print(f"  {generator}: {losses:.2f} kW")

else:
print("Não foi possível obter as perdas totais da rede.")

I tried to run this code but it has some errors that I am not able to fix

[Paulo Radatz]

Hey Marcos,

I see that you are using SnapShot mode. Here are some code using py-dss-interface 1.0.2 that can help you to get the losses (BTW: I will release a new py-dss-interface version this weekend, so the code below would need a few changes) :

print("\nParte 4 - Item 2")
print(f"a")
print(f"Plosses = {dss.circuit_losses()[0] / 10 ** 3} kW")
print(f"b")
print(f"Qlosses = {dss.circuit_losses()[1] / 10 ** 3} kvar")
print(f"c")
print(f"Plinelosses = {dss.circuit_line_losses()[0]} kW")
print(f"Qlinelosses = {dss.circuit_line_losses()[1]} kvar")
print(f"d")
print(f"Ptransformerlosses = {dss.circuit_losses()[0] / 10 ** 3 - dss.circuit_line_losses()[0]} kW")
print(f"Qtransformerlosses = {dss.circuit_losses()[1] / 10 ** 3 - dss.circuit_line_losses()[1]} kvar")
print(f"e")
dss.text(f"compile [{dss_file}]")
dss.text("New EnergyMeter.Feeder element=Line.L115 terminal=1")
dss.text("solve")
dss.meters_write_name("Feeder")
dss.meters_sample()
register_names = dss.meters_register_names()
register_values = dss.meters_register_values()
print(f"a")
print(f"Plosses = {register_values[register_names.index('Zone Losses kWh')]} kW")
print(f"b")
print(f"Qlosses = {register_values[register_names.index('Zone Losses kvarh')]} kvar")
print(f"c")
print(f"Plinelosses = {register_values[register_names.index('Line Losses')]} kW")
print(f"d")
print(f"Ptransformerlosses = {register_values[register_names.index('Transformer Losses')]} kW")

Hope it helps.

Paulo Radatz

[Marcos Ruy Soares Gaudio]

Thank you for your help