Overhead distribution line reinforcement planning method in typhoon weather
A distribution line and typhoon technology, applied in the field of reinforcement planning of overhead distribution lines under typhoon weather
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Embodiment 1
[0143] Based on the statistical data on the movement of typhoons in the western Pacific Ocean that landed in my country's coastal areas from 1998 to 2018, the extraction results of typical typhoon landing parameters are shown in Table 1-3. Combining the four typhoon landing points (22°30′N, 112°40′E), (22°24′N, 112°27′E), (22°12′N, 112°14′E) and )21 °54′N, 112°1′E), forming 256 typical typhoon scenarios, and each typhoon scenario can simulate a typhoon movement.
[0144] Table 1 Typical typhoon landing direction angle
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[0146] Table 2 Typical typhoon landing movement speed
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[0148] Table 3 Pressure difference of typical typhoon landing center
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[0150] The parameters of the storm track model for simulating the typhoon movement path are shown in Table 4-5; the mathematical expression of the storm track model is: Δlnc(t+1)=-0.3522+0.0046ψ(t)-0.0056λ (t)-0.0287lnc(t)-0.0008θ(t), Δθ(t+1)=2.3777-0.0176ψ(t)-0.0024λ(t)+0.0649c(t)-0.8509θ(t)+0.170...
Embodiment 2
[0158] The IEEE-33 node power distribution system is used as the test system; assuming that all distribution lines are overhead lines, typhoons occur twice a year on average, and the line repair time is 24h; 15 minutes is a unit period, that is, ΔT = 0.25h. The spatial location of the distribution line is as Figure 4 As shown; the relative position of the power distribution system and the typical typhoon movement path with the landing point of (105.6km, 55.5km) is as follows Figure 5 As shown, the five-pointed star in the figure is the range where the power distribution system is located.
[0159] Table 6 shows the distribution line load reliability at 6 hours after the typhoon lands under a typical typhoon with a landfall point of (105.6km, -55.5km) and a landfall parameter of [1.1867rad, 16.20km / h, 72.73hpa] . It is not difficult to find that the length, direction and location of the distribution line will affect its load reliability. The load reliability of line L21 an...
Embodiment 3
[0164] According to the difference between the typhoon movement path model and the line reliability evaluation model adopted, 4 Cases are set to verify the effectiveness of the overhead distribution line reinforcement planning method under typhoon weather proposed by the present invention, as shown in Table 7.
[0165] Table 7 Calculation example of distribution line reinforcement planning and its considerations
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[0167]Table 8-9 shows the calculation results of the reinforcement planning corresponding to the four cases: the line to be reinforced, the optimal value of the objective function, the annual value of the line reinforcement cost, the annual power loss before and after reinforcement, and the annual line repair cost after reinforcement. When no lines are reinforced, the power distribution system lacks 14396.62kWh of electricity every year, and it needs US$1546.70 to repair the damaged lines every year, and the annual economic loss is $73529.81.
[0168] Tab...
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