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import numpy as np
import matplotlib
matplotlib.use('Agg')
import matplotlib.pyplot as plt
import matplotlib.image as mpimg
import matplotlib.patches as mpatches
from matplotlib.lines import Line2D
import matplotlib.cm as cm
import matplotlib.colors as mcolors
import logging
logger = logging.getLogger(__name__)
BUS_NAMES = {
1:'650', 2:'632', 3:'633', 4:'645', 5:'646', 6:'671',
7:'684', 8:'611', 9:'634', 10:'675', 11:'652', 12:'680', 13:'692',
}
BUS_COORDS = {
1: (500, 650),
2: (500, 480),
3: (680, 480),
9: (860, 480),
4: (320, 480),
5: (140, 480),
6: (500, 280),
13: (680, 280),
10: (860, 280),
7: (320, 280),
8: (140, 280),
11: (320, 120),
12: (500, 120),
}
LINES = [
(1, 2, '650-632'),
(2, 4, '632-645'),
(4, 5, '645-646'),
(2, 3, '632-633'),
(3, 9, '633-634'),
(2, 6, '632-671'),
(6, 13, '671-692'),
(13, 10, '692-675'),
(6, 7, '671-684'),
(7, 8, '684-611'),
(7, 11, '684-652'),
(6, 12, '671-680'),
]
TRANSFORMER_LINES = set()
def generate_heatmap(voltages, output_path, vmin=0.92, vmax=1.06, map_image="13busmap.png", dc_bus_idx=None):
xs = np.array([BUS_COORDS[i][0] for i in range(1, 14)])
ys = np.array([BUS_COORDS[i][1] for i in range(1, 14)])
zs = np.array(voltages)
xmin_d, xmax_d = -10, 1005
ymin_d, ymax_d = -10, 705
fig, ax = plt.subplots(figsize=(12, 8), frameon=False)
ax.set_xlim(xmin_d, xmax_d)
ax.set_ylim(ymin_d, ymax_d)
ax.set_aspect('equal')
ax.set_axis_off()
# heatmap
try:
img = mpimg.imread(map_image)
ax.imshow(img[::-1], origin='lower', alpha=0.12, zorder=3,
extent=[0, 1005, 0, 705])
except FileNotFoundError:
pass
for (bus_a, bus_b, label) in LINES:
x1, y1 = BUS_COORDS[bus_a]
x2, y2 = BUS_COORDS[bus_b]
is_xfmr = label in TRANSFORMER_LINES
ls = '--' if is_xfmr else '-'
ax.plot([x1, x2], [y1, y2],
color='white', linewidth=7,
solid_capstyle='round', zorder=4)
ax.plot([x1, x2], [y1, y2],
color='#1e293b', linewidth=3,
linestyle=ls, solid_capstyle='round', zorder=5)
mx, my = (x1 + x2) / 2, (y1 + y2) / 2
ax.text(mx, my, label, fontsize=5.5, color='#334155',
ha='center', va='center', zorder=6,
bbox=dict(fc='white', alpha=0.8, ec='#cbd5e1', pad=1.5))
# bus nodes on map
for bus_id, (bx, by) in BUS_COORDS.items():
v = voltages[bus_id - 1]
# violation outliens
if v < 0.95:
ax.scatter(bx, by, s=500, color='#ef4444', alpha=0.35, zorder=7)
elif v > 1.05:
ax.scatter(bx, by, s=500, color='#f59e0b', alpha=0.35, zorder=7)
#fill color
t = np.clip((v - vmin) / (vmax - vmin), 0, 1)
bus_color = plt.cm.RdYlGn(t)
marker = 's' if bus_id == 1 else 'o'
path_collection = ax.scatter(bx, by, s=200, color=bus_color,
marker=marker, edgecolors='#1e293b',
linewidths=2, zorder=8)
path_collection.set_gid(f"bus-node-{bus_id}")
v_color = '#dc2626' if v < 0.95 else '#d97706' if v > 1.05 else '#166534'
ax.text(bx, by + 30, f'Bus {bus_id}',
fontsize=7.5, fontweight='bold', color='#1e293b',
ha='center', va='bottom', zorder=9,
bbox=dict(fc='white', alpha=0.8, ec='none', pad=1.5))
ax.text(bx, by - 30, f'{v:.3f} p.u.',
fontsize=7.5, fontweight='bold', color=v_color,
ha='center', va='top', zorder=9,
bbox=dict(fc='white', alpha=0.8, ec='none', pad=1.5))
#data center marker
if dc_bus_idx is not None and dc_bus_idx in BUS_COORDS:
dcx, dcy = BUS_COORDS[dc_bus_idx]
ax.scatter(dcx, dcy, s=700, color='none',
edgecolors='#0891b2', linewidths=3, zorder=10)
ax.scatter(dcx, dcy, s=900, color='none',
edgecolors='#0891b2', linewidths=1, alpha=0.4, zorder=10)
ax.annotate(
'DATA CENTER',
xy=(dcx, dcy), xytext=(dcx, dcy + 65),
fontsize=8, fontweight='bold', color='#0891b2',
ha='center', va='bottom', zorder=11,
bbox=dict(boxstyle='round,pad=0.3', fc='#ecfeff', ec='#0891b2', lw=1.5),
arrowprops=dict(arrowstyle='->', color='#0891b2', lw=1.5),
)
norm = mcolors.Normalize(vmin=vmin, vmax=vmax)
sm = plt.cm.ScalarMappable(cmap='RdYlGn', norm=norm)
sm.set_array([])
cbar = fig.colorbar(sm, ax=ax, shrink=0.6, pad=0.02, aspect=25)
cbar.set_label('Voltage (p.u.)', fontsize=10, labelpad=8)
cbar.ax.tick_params(labelsize=8)
cbar.ax.axhline(y=(0.95 - vmin) / (vmax - vmin), color='#ef4444', linewidth=1.5, linestyle='--')
cbar.ax.axhline(y=(1.05 - vmin) / (vmax - vmin), color='#f59e0b', linewidth=1.5, linestyle='--')
ax.set_facecolor('white')
fig.patch.set_facecolor('white')
legend_elements = [
Line2D([0],[0], marker='o', color='w', markerfacecolor='none',
markersize=12, markeredgecolor='#0891b2', markeredgewidth=2.5,
label='Data center bus'),
mpatches.Patch(color='#ef4444', alpha=0.5, label='Under-voltage < 0.95 p.u.'),
mpatches.Patch(color='#f59e0b', alpha=0.5, label='Over-voltage > 1.05 p.u.'),
Line2D([0],[0], marker='s', color='w', markerfacecolor='#6b7280',
markersize=9, markeredgecolor='#1e293b', label='Substation (Bus 1 = 650)'),
Line2D([0],[0], marker='o', color='w', markerfacecolor='#6b7280',
markersize=9, markeredgecolor='#1e293b', label='Load bus'),
mpatches.Patch(color='none', label=' '),
mpatches.Patch(color='none', label='Bus index:'),
mpatches.Patch(color='none', label='1=650 2=632 3=633'),
mpatches.Patch(color='none', label='4=645 5=646 6=671'),
mpatches.Patch(color='none', label='7=684 8=611 9=634'),
mpatches.Patch(color='none', label='10=675 11=652 12=680'),
mpatches.Patch(color='none', label='13=692'),
]
ax.legend(handles=legend_elements, loc='lower right',
fontsize=6.5, framealpha=0.92, edgecolor='#cbd5e1',
handlelength=1.5, handleheight=1.0)
plt.tight_layout(pad=0.3)
plt.rcParams['svg.fonttype'] = 'none'
plt.savefig(output_path, format='svg', bbox_inches='tight', dpi=150, facecolor='white')
plt.close()
logger.info(f"Saved heatmap: {output_path}")
if __name__ == "__main__":
if len(sys.argv) < 15:
logger.info(f"Usage: generate_heatmap.py <output.png> <v1> <v2> ... <v13> [dc_bus_idx]")
sys.exit(1)
out = sys.argv[1]
volts = [float(v) for v in sys.argv[2:15]]
dc_bus = int(sys.argv[15]) if len(sys.argv) > 15 else None
generate_heatmap(volts, out, dc_bus_idx=dc_bus)
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