Gallop eliminating and ice melting transformer design method considering wide voltage regulation and fine and adjustable current
A transformer and wide voltage regulation technology, which is applied in the field of deicing and melting transformer design, can solve the problems of lack of line parameter change adaptability, design results that are difficult to achieve optimal, and the number of transformer gears is too large, etc., to achieve excellent design results, Avoid the effect of trial and error and small number of gears
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Embodiment 1
[0021] This embodiment discloses a design method of an ice-melting transformer that takes into account a wide voltage regulation range and can finely adjust the ice-melting current, such as figure 1 shown, including the following steps:
[0022] Step S1. Determine the rated current of the secondary side of the transformer according to the maximum value of the deicing and melting reference currents of all wires to be deiced.
[0023] Step S2 , calculating the highest and lowest DC voltages required by the DC ice melting device according to the deicing and melting reference current, the maximum ice melting current and the resistance parameters of all wires of the lines to be melted.
[0024] Step S3. Determine the number of transformer gears according to the ratio between the highest ice-melting DC voltage and the lowest ice-melting DC voltage.
[0025] Step S4, according to the current equivalent of the rectifier series-parallel connection and the combination mode of the ice-m...
Embodiment 2
[0072] Corresponding to Embodiment 1, this embodiment further describes the present invention in detail in conjunction with a specific design case.
[0073] 1.1) Summarize all the ice-melting circuits applicable to this set of deicing and melting devices, as well as the line type and resistance parameters of each circuit. For a fixed DC deicing device, the line types and parameters of all icing lines in the substation are shown in Table 2.
[0074] Table 2
[0075] line number Voltage (kV) Wire type Length (km) Resistance R l (Ω)
Inductive reactanceX l (Ω)
1# 220 LGJ-300 / 40 10.6 1.00 4.35 2# 220 JLHA1-400 51 3.67 20.45 3# 220 LGJ-400 / 35 56.053 4.04 22.48 4# 110 LGJ-300 / 40 12.18 1.14 4.99 5# 110 LGJ-240 / 30 9.375 1.23 3.76 6# 110 LGJ-240 / 30 44.515 5.83 17.85 7# 110 LGJ-240 / 30 3.5 0.46 1.40 8# 110 LGJ-240 / 30 16.684 2.19 6.69 9# 110 LGJ-240 / 30 22.757 2.98 9.13 ...
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