Time sequential module broken for BDU due to dispatch_type merge column not existing

[jpolyy]

FYI: There is a bug in time_sequential.py where since BDUs in nempy require the dispatch_type column to differentiate between gen and load, this module has not been updated and as a result there are duplicate row entries when construct_ramp_rate_parameters and create_seed_ramp_rate_parameters.

My fix is below here:

Current

def construct_ramp_rate_parameters(last_interval_dispatch, ramp_rates):
    ...
    last_interval_energy_dispatch = last_interval_dispatch[last_interval_dispatch['service'] == 'energy']
    last_interval_energy_dispatch = last_interval_energy_dispatch.loc[:, ['unit', 'dispatch']]
    last_interval_energy_dispatch.columns = ['unit', 'initial_output']
    ramp_rates = pd.merge(last_interval_energy_dispatch, ramp_rates, how='right', on='unit')

Patched

def construct_ramp_rate_parameters(last_interval_dispatch, ramp_rates):
    ...
    last_interval_energy_dispatch = last_interval_dispatch[last_interval_dispatch['service'] == 'energy']
    last_interval_energy_dispatch = last_interval_energy_dispatch.loc[:, ['unit', 'dispatch_type','dispatch']]
    last_interval_energy_dispatch.columns = ['unit','dispatch_type', 'initial_output']
    ramp_rates = pd.merge(last_interval_energy_dispatch, ramp_rates, how='right', on=['unit','dispatch_type'])