Bus starts overcharged, and continues to overcharge

[nickolasclarke]

found while investigating #89, using the same scenario and data. See that ticket for the csv used.

Expected results:

1. Bus is created with 220 kwh, and can only charge to 220kwh max.
2. Bus only serves 1 trip at at time.

Observed Results:
In this scenario Bus 767 appears to start with significantly higher power than 220kwh (assuming energy left is in units kwh) It also continues to overcharge, over 2000kwh at its peak. It also serves two trips with the same start/end arrival_time fields, one of which starts from a depot, another of which starts in the middle of a block. This suggests it serves two trips at at time.

opti_trips = pd.read_csv('actransit/220kwh_500_kw_trips.csv', index_col=0)
opti_trips[opti_trips['bus_id'] == 767].sort_values('end_arrival_time')

	block_id	bus_busy_end	bus_busy_start	bus_id	distance	end_arrival_time	end_depot_id	end_stop_id	energy_left	start_arrival_time	start_depot_id	start_stop_id	trip_id	wait_time
6086	9.3227e+07	33540	30000	767	22821.2	33540	-9.22337e+18	5256	621.668	30000	-9.22337e+18	5546	3.83441e+08	1260
6098	9.3227e+07	33540	28032.6	767	22821.2	33540	-9.22337e+18	5256	358.007	30000	3	5546	3.83441e+08	1260
6087	9.3227e+07	38280	34800	767	22490	38280	-9.22337e+18	1351	786.259	34800	-9.22337e+18	1593	3.83387e+08	1320
6088	9.3227e+07	43320	39600	767	22821.2	43320	-9.22337e+18	5256	917.242	39600	-9.22337e+18	5546	3.83449e+08	1080
6089	9.3227e+07	47940	44400	767	22490	47940	-9.22337e+18	1351	1073.5	44400	-9.22337e+18	1593	3.83395e+08	1260
6090	9.3227e+07	52980	49200	767	22821.2	52980	-9.22337e+18	5256	1196.15	49200	-9.22337e+18	5546	3.83457e+08	1020
6091	9.3227e+07	57660	54000	767	22490	57660	-9.22337e+18	1351	1335.74	54000	-9.22337e+18	1593	3.83403e+08	1140
6092	9.3227e+07	63000	58800	767	22821.2	63000	-9.22337e+18	5256	1566.72	58800	-9.22337e+18	5546	3.83465e+08	1800
6093	9.3227e+07	68280	64800	767	22490	68280	-9.22337e+18	1351	1731.31	64800	-9.22337e+18	1593	3.83412e+08	1320
6094	9.3227e+07	73200	69600	767	22821.2	73200	-9.22337e+18	5256	1878.96	69600	-9.22337e+18	5546	3.83474e+08	1200
6095	9.3227e+07	77520	74400	767	22490	77520	-9.22337e+18	1351	2093.56	74400	-9.22337e+18	1593	3.8342e+08	1680
6096	9.3227e+07	82800	79200	767	22821.2	82800	-9.22337e+18	5256	2241.2	79200	-9.22337e+18	5546	3.83482e+08	1200
6097	9.3227e+07	30765.1	84000	767	22490	86820	3	1351	2204.82	84000	-9.22337e+18	1593	3.83428e+08	0