加了一些TODO
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26
core.py
26
core.py
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@ -1,6 +1,7 @@
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import math
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import ezdxf
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import numpy as np
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from typing import List
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gCAD = None
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gMSP = None
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@ -15,8 +16,8 @@ class Parameter:
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insulator_c_len: float # 串子绝缘长度
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string_c_len: float
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string_g_len: float
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gc_x: [float] # 导、地线水平坐标
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ground_angels: [float] # 地面倾角,向下为正
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gc_x: List[float] # 导、地线水平坐标
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ground_angels: List[float] # 地面倾角,向下为正
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h_arm: float # 导、地线垂直坐标
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altitude: int # 海拔,单位米
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max_i: float # 最大尝试电流,单位kA
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@ -131,7 +132,7 @@ def solve_circle_intersection(
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x = radius2 + center_x2 # 初始值
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y = radius2 + center_y2 # 初始值
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# TODO 考虑出现2个解的情况
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for bar in range(0, 10):
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for _ in range(0, 10):
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A = [
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[-2 * (x - center_x1), -2 * (y - center_y1)],
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[-2 * (x - center_x2), -2 * (y - center_y2)],
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@ -189,12 +190,20 @@ def solve_circle_line_intersection(
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def min_i(string_len, u_ph):
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# 海拔修正
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altitude = para.altitude
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if altitude > 1000:
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k_a = math.exp((altitude - 1000) / 8150) # 气隙海拔修正
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else:
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k_a = 1
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u_50 = 1 / k_a * (530 * string_len + 35) # 50045 上附录的公式,实际应该用负极性电压的公式
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# u_50 = 1 / k_a * (533 * string_len + 132) # 串放电路径 1000m海拔
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# u_50 = 1 / k_a * (477 * string_len + 99) # 串放电路径 2000m海拔
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# u_50 = 615 * string_len # 导线对塔身放电 1000m海拔
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# u_50= 263.32647401+533.90081562*string_len
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z_0 = 300 # 雷电波阻抗
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z_c = 251 # 导线波阻抗
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# 新版大手册公式 3-277
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r = (u_50 + 2 * z_0 / (2 * z_0 + z_c) * u_ph) * (2 * z_0 + z_c) / (z_0 * z_c)
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# r = 2 * (u_50 - u_ph) / z_c
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return r
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@ -207,12 +216,15 @@ def thunder_density(i, td, ip_a, ip_b): # 雷电流幅值密度函数
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r = -(
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-ip_b / ip_a / ((1 + (i / ip_a) ** ip_b) ** 2) * ((i / ip_a) ** (ip_b - 1))
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)
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return r
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else:
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if td == 20:
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r = -(10 ** (-i / 44)) * math.log(10) * (-1 / 44) # 雷暴日20d
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return r
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if td == 40:
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r = -(10 ** (-i / 88)) * math.log(10) * (-1 / 88) # 雷暴日40d
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return r
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raise Exception("检查雷电参数!")
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def angel_density(angle): # 入射角密度函数 angle单位是弧度
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@ -226,7 +238,7 @@ def rs_fun(i):
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def rc_fun(i, u_ph):
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r = 1.63 * ((5.015 * (i ** 0.578) - 0.001 * u_ph) ** 1.125) # 新版大手册公式3-272
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r = 1.63 * ((5.015 * (i**0.578) - 0.001 * u_ph * 1) ** 1.125) # 新版大手册公式3-272
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return r
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@ -235,7 +247,7 @@ def rg_fun(i_curt, h_cav, u_ph, typ="g"):
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rg = None
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if typ == "g":
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if h_cav < 40:
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rg = (3.6 + 1.7 ** math.log(43 - h_cav)) * (i_curt ** 0.65) # 新版大手册公式3-273
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rg = (3.6 + 1.7 * math.log(43 - h_cav)) * (i_curt**0.65) # 新版大手册公式3-273
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else:
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rg = 5.5 * (i_curt**0.65) # 新版大手册公式3-273
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elif typ == "c": # 此时返回的是圆半径
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@ -473,6 +485,8 @@ def circle_ground_surface_intersection(radius, center_x, center_y, ground_surfac
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# insulator_c_len绝缘子闪络距离
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def arc_possibility(rated_voltage, insulator_c_len): # 建弧率
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# 50064 中附录给的公式
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_e = rated_voltage / (3 ** 0.5) / insulator_c_len
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# TODO 需要区分交直流
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# _e = rated_voltage / (3**0.5) / insulator_c_len #交流
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_e = abs(rated_voltage) / (1) / insulator_c_len # 直流
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r = (4.5 * (_e**0.75) - 14) * 1e-2
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return r
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