一些小细节的修改。

main.py

@@ -7,7 +7,7 @@ import timeit
 def egm():
     h_g_avr_sag = 11.67 * 2 / 3
     h_c_avr_sag = 14.43 * 2 / 3
-    h_whole = 260  # 杆塔全高
+    h_whole = 40  # 杆塔全高
     voltage_n = 3  # 工作电压分成多少份来计算
     td = 20  # 雷暴日
     insulator_c_len = 6.8  # 串子绝缘长度
@@ -36,33 +36,38 @@ def egm():
     rg_x = None
     rg_y = None
     cad = Draw()
+    # 跳闸率 利用Q╱GDW 11452-2015 架空输电线路防雷导则的公式 Ng=0.023*Td^(1.3) 20天雷暴日地闪密度为1.13
+    ng = func_ng(td)
     n_sf_phases = np.zeros((phase_n, voltage_n))  # 计算每一相的跳闸率
-    for phase_conductor in range(phase_n):
-        rs_x = gc_x[phase_conductor]
-        rs_y = gc_y[phase_conductor]
-        rc_x = gc_x[phase_conductor + 1]
-        rc_y = gc_y[phase_conductor + 1]
+    if np.any(np.array(gc_y) < 0):
+        print("导线可能掉地面了，程序退出。")
+        return 0
+    for phase_conductor_foo in range(phase_n):
+        exposed_curve_shielded = False
+        rs_x = gc_x[phase_conductor_foo]
+        rs_y = gc_y[phase_conductor_foo]
+        rc_x = gc_x[phase_conductor_foo + 1]
+        rc_y = gc_y[phase_conductor_foo + 1]
         if phase_n == 1:
             rg_type = "g"
         if phase_n > 1:  # 多回路
-            if phase_conductor < 2:
+            if phase_conductor_foo < 2:
                 rg_type = "c"
-                rg_x = gc_x[phase_conductor + 2]
-                rg_y = gc_y[phase_conductor + 2]
+                rg_x = gc_x[phase_conductor_foo + 2]
+                rg_y = gc_y[phase_conductor_foo + 2]
             else:
                 rg_type = "g"
         # TODO 保护角公式可能有问题，后面改
         shield_angle = (
-            math.atan(rc_x / ((rc_y - rs_y) + string_c_len)) * 180 / math.pi
+            math.atan((rc_x - rs_x) / ((rs_y - rc_y) + string_c_len)) * 180 / math.pi
         )  # 保护角
         print(f"保护角{shield_angle:.3f}°")
         print(f"最低相防护标识{rg_type}")
-        ng = func_ng(td)
         for u_bar in range(voltage_n):
             u_ph = (
                 math.sqrt(2) * 750 * math.cos(2 * math.pi / voltage_n * u_bar) / 1.732
             )  # 运行相电压
-            print(f"计算第{phase_conductor + 1}相，电压为{u_ph:.2f}kV")
+            print(f"计算第{phase_conductor_foo + 1}相，电压为{u_ph:.2f}kV")
             # 迭代法计算最大电流
             i_max = 0
             i_min = min_i(insulator_c_len, u_ph / 1.732)
@@ -151,17 +156,21 @@ def egm():
                     )
                     if distance > rc:
                         print("暴露弧已经完全被屏蔽")
+                        exposed_curve_shielded = True
                         break
-            if phase_conductor == 2:
-                cad.draw(i_min, u_ph, rs_x, rs_y, rc_x, rc_y, rg_x, rg_y, rg_type, 2)
-                cad.draw(i_max, u_ph, rs_x, rs_y, rc_x, rc_y, rg_x, rg_y, rg_type, 6)
-                cad.save()
+            # if phase_conductor_foo == 2:
+            cad.draw(i_min, u_ph, rs_x, rs_y, rc_x, rc_y, rg_x, rg_y, rg_type, 2)
+            cad.draw(i_max, u_ph, rs_x, rs_y, rc_x, rc_y, rg_x, rg_y, rg_type, 6)
+            cad.saveas(f"egm{phase_conductor_foo+1}.dxf")
             # 判断是否导线已经被完全保护
             if abs(i_max - _max_i) < 1e-5:
                 print("无法找到最大电流，可能是杆塔较高。")
                 print(f"最大电流设置为自然界最大电流{i_max}kA")
             print(f"最大电流为{i_max:.2f}")
             print(f"最小电流为{i_min:.2f}")
+            if exposed_curve_shielded:
+                print("暴露弧已经完全被屏蔽,不会跳闸。")
+                continue
             curt_fineness = 0.1  # 电流积分细度
             if i_min > i_max or abs(i_min - i_max) < curt_fineness:
                 print("最大电流小于最小电流，没有暴露弧。")
@@ -204,11 +213,9 @@ def egm():
             #     if abs(calculus-0.05812740052770032)<1e-5:
             #         abc=123
             #         pass
-            n_sf = (
-                2 * ng / 10 * calculus
-            )  # 跳闸率 利用Q╱GDW 11452-2015 架空输电线路防雷导则的公式 Ng=0.023*Td^(1.3) 20天雷暴日地闪密度为1.13
+            n_sf = (2 * ng / 10 * calculus) * arc_possibility(750, insulator_c_len)
             avr_n_sf += n_sf / voltage_n
-            n_sf_phases[phase_conductor][u_bar] = n_sf
+            n_sf_phases[phase_conductor_foo][u_bar] = n_sf
             print(f"工作电压为{u_ph:.2f}kV时,跳闸率是{n_sf:.6}")
     print(f"跳闸率是{avr_n_sf:.6f}")
     print(f"不同相跳闸率是{np.mean(n_sf_phases,axis=1)}")