fix(simulation): use hydraulic timestep

app/services/simulation.py

@@ -34,7 +34,7 @@ import psycopg
 import logging
 import app.services.globals as globals
 import app.services.project_info as project_info
-from app.services.time_api import parse_beijing_time
+from app.services.time_api import parse_beijing_time, parse_clock_duration_seconds
 from app.core.config import get_pgconn_string
 from app.infra.db.timescaledb.internal_queries import (
     InternalQueries as TimescaleInternalQueries,
@@ -757,11 +757,13 @@ def run_simulation(
 
     # 获取水力模拟步长，如’0:15:00‘
     globals.hydraulic_timestep = dic_time["HYDRAULIC TIMESTEP"]
-    # 将时间字符串转换为 timedelta 对象
-    time_obj = datetime.strptime(globals.hydraulic_timestep, "%H:%M:%S")
-    # 转换为分钟浮点数
-    globals.PATTERN_TIME_STEP = float(
-        time_obj.hour * 60 + time_obj.minute + time_obj.second / 60
+    # 转换为分钟浮点数，兼容 EPANET 的 H:MM 和 H:MM:SS 写法
+    globals.PATTERN_TIME_STEP = (
+        parse_clock_duration_seconds(
+            globals.hydraulic_timestep,
+            field_name="HYDRAULIC TIMESTEP",
+        )
+        / 60
     )
     # 对输入的时间参数进行处理
     pattern_start_time = convert_time_format(modify_pattern_start_time)