234 lines
9.7 KiB
Python
234 lines
9.7 KiB
Python
import numpy as np
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from core import *
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import timeit
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def egm():
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h_g_avr_sag = 11.67 * 2 / 3
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h_c_avr_sag = 14.43 * 2 / 3
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h_whole = 40 # 杆塔全高
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voltage_n = 3 # 工作电压分成多少份来计算
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td = 20 # 雷暴日
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insulator_c_len = 6.8 # 串子绝缘长度
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string_c_len = 9.2
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string_g_len = 0.5
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gc_x = [17.9, 17, 15, 17]
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# 以后考虑地形角度,地面线
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def ground_surface(x):
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return 0
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gc_y = [
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h_whole - string_g_len - h_g_avr_sag, # 地线对地平均高
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h_whole - string_c_len - h_c_avr_sag - 2.7, # 导线对地平均高
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h_whole - string_c_len - h_c_avr_sag - 20, # 导线对地平均高
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h_whole - string_c_len - h_c_avr_sag - 35.7, # 导线对地平均高
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]
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if len(gc_y) > 2: # 双回路
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phase_n = 3 # 边相导线数量
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else:
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phase_n = 1
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#########################################################
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rg_type = None
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# 以上是需要设置的参数
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avr_n_sf = 0 # 考虑电压的影响计算的跳闸率
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rg_x = None
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rg_y = None
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cad = Draw()
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# 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
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ng = func_ng(td)
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n_sf_phases = np.zeros((phase_n, voltage_n)) # 计算每一相的跳闸率
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if np.any(np.array(gc_y) < 0):
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print("导线可能掉地面了，程序退出。")
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return 0
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for phase_conductor_foo in range(phase_n):
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exposed_curve_shielded = False
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rs_x = gc_x[phase_conductor_foo]
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rs_y = gc_y[phase_conductor_foo]
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rc_x = gc_x[phase_conductor_foo + 1]
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rc_y = gc_y[phase_conductor_foo + 1]
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if phase_n == 1:
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rg_type = "g"
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if phase_n > 1: # 多回路
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if phase_conductor_foo < 2:
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rg_type = "c"
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rg_x = gc_x[phase_conductor_foo + 2]
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rg_y = gc_y[phase_conductor_foo + 2]
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else:
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rg_type = "g"
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# TODO 保护角公式可能有问题，后面改
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shield_angle = (
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math.atan((rc_x - rs_x) / ((rs_y - rc_y) + string_c_len)) * 180 / math.pi
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) # 保护角
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print(f"保护角{shield_angle:.3f}°")
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print(f"最低相防护标识{rg_type}")
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for u_bar in range(voltage_n):
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u_ph = (
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math.sqrt(2) * 750 * math.cos(2 * math.pi / voltage_n * u_bar) / 1.732
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) # 运行相电压
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print(f"计算第{phase_conductor_foo + 1}相，电压为{u_ph:.2f}kV")
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# 迭代法计算最大电流
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i_max = 0
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i_min = min_i(insulator_c_len, u_ph / 1.732)
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_min_i = i_min # 尝试的最小电流
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_max_i = 200 # 尝试的最大电流
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# cad.draw(i_min, u_ph, rs_x, rs_y, rc_x, rc_y, rg_x, rg_y, rg_type, 2)
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for i_bar in np.linspace(
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_min_i, _max_i, int((_max_i - _min_i) / 0.1)
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): # 雷电流
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# print(f"尝试计算电流为{i_bar:.2f}")
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rs = rs_fun(i_bar)
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rc = rc_fun(i_bar, u_ph)
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rg = rg_fun(i_bar, rc_y, u_ph, typ=rg_type)
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#######
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# cccCount += 1
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# if cccCount % 30 == 0:
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# import core
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#
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# core.gMSP.add_circle((0, h_gav), rs)
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# core.gMSP.add_circle(
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# (dgc, h_cav), rc_fun(i_bar, -u_ph), dxfattribs={"color": 4}
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# )
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# core.gMSP.add_circle((dgc, h_cav), rc)
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#######
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rg_rc_circle_intersection = solve_circle_intersection(
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rs, rc, rs_x, rs_y, rc_x, rc_y
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)
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i_max = i_bar
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if not rg_rc_circle_intersection: # if circle_intersection is []
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print("保护弧和暴露弧无交点，检查设置参数。")
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continue
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circle_rc_line_or_rg_intersection = None
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if rg_type == "g":
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circle_rc_line_or_rg_intersection = solve_circle_line_intersection(
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rc, rg, rc_x, rc_y
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)
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elif rg_type == "c":
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circle_rc_line_or_rg_intersection = solve_circle_intersection(
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rg, rc, rg_x, rg_y, rc_x, rc_y
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)
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if not circle_rc_line_or_rg_intersection:
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# 暴露弧和捕捉弧无交点
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if rg_type == "g":
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if rg > rc_y:
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i_min = i_bar
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print(f"捕捉弧在暴露弧之上，设置最小电流为{i_min:.2f}")
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else:
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print("暴露弧和捕捉弧无交点，检查设置参数。")
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continue
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else:
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print("暴露弧和捕捉弧无交点，检查设置参数。")
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continue
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min_distance_intersection = (
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np.sum(
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(
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np.array(rg_rc_circle_intersection)
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- np.array(circle_rc_line_or_rg_intersection)
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)
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** 2
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)
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** 0.5
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) # 计算两圆交点和地面直线交点的最小距离
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if min_distance_intersection < 0.1:
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break
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# 判断是否以完全被保护
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if rg_rc_circle_intersection[1] < circle_rc_line_or_rg_intersection[1]:
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circle_rs_line_or_rg_intersection = None
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if rg_type == "g":
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circle_rs_line_or_rg_intersection = (
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solve_circle_line_intersection(rs, rg, rs_x, rs_y)
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)
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if rg_type == "c":
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circle_rs_line_or_rg_intersection = solve_circle_intersection(
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rs, rg, rs_x, rs_y, rg_x, rg_y
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)
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# 判断与保护弧的交点是否在暴露弧外面
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distance = (
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np.sum(
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(
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np.array(circle_rs_line_or_rg_intersection)
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- np.array([rc_x, rc_y])
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)
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** 2
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)
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** 0.5
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)
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if distance > rc:
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print("暴露弧已经完全被屏蔽")
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exposed_curve_shielded = True
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break
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# if phase_conductor_foo == 2:
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cad.draw(i_min, u_ph, rs_x, rs_y, rc_x, rc_y, rg_x, rg_y, rg_type, 2)
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cad.draw(i_max, u_ph, rs_x, rs_y, rc_x, rc_y, rg_x, rg_y, rg_type, 6)
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cad.saveas(f"egm{phase_conductor_foo+1}.dxf")
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# 判断是否导线已经被完全保护
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if abs(i_max - _max_i) < 1e-5:
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print("无法找到最大电流，可能是杆塔较高。")
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print(f"最大电流设置为自然界最大电流{i_max}kA")
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print(f"最大电流为{i_max:.2f}")
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print(f"最小电流为{i_min:.2f}")
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if exposed_curve_shielded:
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print("暴露弧已经完全被屏蔽,不会跳闸。")
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continue
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curt_fineness = 0.1 # 电流积分细度
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if i_min > i_max or abs(i_min - i_max) < curt_fineness:
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print("最大电流小于最小电流，没有暴露弧。")
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continue
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# 开始积分
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curt_segment_n = int((i_max - i_min) / curt_fineness) # 分成多少份
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i_curt_samples, d_curt = np.linspace(
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i_min, i_max, curt_segment_n + 1, retstep=True
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)
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bd_area_vec = np.vectorize(bd_area)
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cal_bd_np = (
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bd_area_vec(
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i_curt_samples,
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u_ph,
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rc_x,
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rc_y,
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rs_x,
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rs_y,
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rg_x,
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rg_y,
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ground_surface,
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rg_type,
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)
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* thunder_density(i_curt_samples)
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)
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calculus = np.sum(cal_bd_np[:-1] + cal_bd_np[1:]) / 2 * d_curt
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# for i_curt in i_curt_samples[:-1]:
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# cal_bd_first = bd_area(i_curt, u_ph, dgc, h_gav, h_cav)
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# cal_bd_second = bd_area(i_curt + d_curt, u_ph, dgc, h_gav, h_cav)
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# cal_thunder_density_first = thunder_density(i_curt)
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# cal_thunder_density_second = thunder_density(i_curt + d_curt)
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# calculus += (
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# (
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# cal_bd_first * cal_thunder_density_first
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# + cal_bd_second * cal_thunder_density_second
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# )
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# / 2
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# * d_curt
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# )
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# if abs(calculus-0.05812740052770032)<1e-5:
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# abc=123
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# pass
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n_sf = (2 * ng / 10 * calculus) * arc_possibility(750, insulator_c_len)
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avr_n_sf += n_sf / voltage_n
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n_sf_phases[phase_conductor_foo][u_bar] = n_sf
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print(f"工作电压为{u_ph:.2f}kV时,跳闸率是{n_sf:.6}")
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print(f"跳闸率是{avr_n_sf:.6f}")
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print(f"不同相跳闸率是{np.mean(n_sf_phases,axis=1)}")
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def speed():
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a = 0
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for bar in range(100000000):
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a += bar
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if __name__ == "__main__":
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run_time = timeit.timeit("egm()", globals=globals(), number=1)
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print(f"运行时间:{run_time:.2f}s")
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print("Finished.")
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