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Design method of deicing and melting transformer with wide voltage regulation and fine current adjustment

A transformer and wide voltage regulation technology, applied in the design field of ice-melting transformers, can solve the problems of lack of adaptability to line parameter changes, difficult to achieve optimal design results, and too many transformer gears, and achieve excellent design results, The effect of a small number of stalls and a simple design process

Active Publication Date: 2022-03-08
STATE GRID HUNAN ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

More importantly, the selection of each gear corresponding to the secondary side voltage lacks overall planning, that is, generally only the needs of a certain line are considered without considering the needs of multiple lines, which often leads to the design of a large number of transformer gears and a lack of Adaptability to changes in line parameters, the design results are difficult to achieve optimal

Method used

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  • Design method of deicing and melting transformer with wide voltage regulation and fine current adjustment
  • Design method of deicing and melting transformer with wide voltage regulation and fine current adjustment
  • Design method of deicing and melting transformer with wide voltage regulation and fine current adjustment

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Embodiment 1

[0021] This example discloses a blending transformer design method for banging the wide regulation range and can also have a fine-tunable ice current, such as figure 1 As shown, including the following steps:

[0022] Step S1 determines the secondary rated current of the transformer according to the maximum value of all the long-defraulous ice based on the ice line to be melted.

[0023] Step S2, calculate the highest and lowest end of the ice devices required for the Direct Rongshing Device according to all the long-term bursting ice based on the ice-free line of the ice line wire to be brought to the ice line wire.

[0024] Step S3 determines the number of transformer gear positions based on the ratio between the highest threshing DC voltage and the lowest threshing DC voltage.

[0025] Step S4, depending on the current of the rectifier string and the fluid fluid in combination mode to different transformer gear positions in the rectifier series, the flow of the ice pattern, the...

Embodiment 2

[0072] In accordance with Example 1, the present embodiment combines a specific design case to further explain the present invention.

[0073] 1.1) Summarize all the wire type and resistance parameters of each line and resistance parameters for each line and resistance parameters of each line. For a fixed DC mesh, the line type and parameters of all the ice-free lines of the substation are shown in Table 2.

[0074] Table 2

[0075] Line number Voltage (kV) Wire model Length (km) Resistance R l (Ω)

Insulating 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 10# 110 LGJ-240 / 30 8.573 1.12 3.44 11# 110 LGJ-240 / 30 ...

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Abstract

The invention relates to the technical field of electrical engineering, and discloses a design method for a dance-dispelling and ice-melting transformer that takes into account both wide voltage regulation and finely adjustable current. The method includes: determining 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; Calculate the highest and lowest ice-melting DC voltage required by the DC ice-melting device; determine the number of transformer gears according to the ratio between the highest ice-melting DC voltage and the lowest ice-melting DC voltage; The current is equivalent to the current of different transformer gears unified in the rectifier series and ice-melting two-phase series mode, and the output voltage of each gear of the ice-melting transformer is designed so that the ice-melting currents corresponding to different gears do not overlap and are different. The equivalent output voltages of the gears have no cross-overlap.

Description

Technical field [0001] The present invention relates to the field of electrical engineering technologies, and in particular, a method of designing a long-conditioned ice transformer with a wide pressure and current elimination. Background technique [0002] In winter, the transmission line is easy to have ice, the ice and ice weather is easy to have ice, and the ice and transmission line is very easy to dance. A large number of dancing lines across the railways, highways, etc. [0003] The three elements of excitation wire dance are wireless, wind excitation, line structure and parameters. The existing anti-dance measures are mainly to inhibit wind motility, change the mechanics characteristics of wires, without considering destroying ice-free excitation to eliminate dancing. By timely taking the dance line, it can achieve the purpose of actively eliminating the transmission of the line dancing by timely-breaking measures, destroying the light ice incentive conditions of the line...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G1/02H02G7/16H02G7/14
CPCH02G1/02H02G7/16H02G7/14
Inventor 黄清军李波谭艳军朱思国朱远毛新果
Owner STATE GRID HUNAN ELECTRIC POWER
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