Alternating-current ice melting device and method for continuously adjusting voltage frequency of multiple branches of distribution network

A technology of voltage frequency and ice-melting method, which is applied in the field of AC ice-melting devices, can solve the problems of hard-to-distribute network multi-branch line melting, low efficiency of machine-melting ice-melting ice, and limited ice-melting range, etc., to increase the ice-melting function , Improve the efficiency of ice melting

Active Publication Date: 2021-08-06
GUIZHOU POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an AC ice-melting device and method for continuously adjustable multi-branch voltage and frequency in the distribution network, so as to solve the problem of DC ice-melting in the multi-branch

Method used

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  • Alternating-current ice melting device and method for continuously adjusting voltage frequency of multiple branches of distribution network
  • Alternating-current ice melting device and method for continuously adjusting voltage frequency of multiple branches of distribution network

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Example Embodiment

[0028] Example 1:

[0029] The embodiment of the present invention provides a variable frequency alternating ice system configuration structure adapted to a flexible substation, a voltage frequency continuously adjusted, and is specifically implemented. figure 1 Indicated. The implementation provided by the present invention is that the B2B-MMC replacement contact switch is mounted in the substation, and the common function is to regulate, the content included in the conventional function is not the content of the present invention, and the present invention is a new function and new function outside the common function. Technology. In terms of B2B-MMC access method, different conventional functions are to access a combined ice transformer and the ice circuit breaker S4, S5, so that it can adapt to the complex state of multi-branch of the distribution network, whether it is the ice hand Handle overhead lines, branch lines or overhead main lines, when the ice-beaten side reversal v...

Example Embodiment

[0030] Example 2:

[0031] The second embodiment of the present invention provides a variable conversion alternating ice technology model adapting to multi-branch of distribution network, voltage frequency continuous adjustment, and specific implementation figure 2 Indicated. A control process adapted to the multi-branch of the distribution network, the voltage frequency continuous adjustment, includes the following steps:

[0032] Step 101: Determine the online burst target line;

[0033] Step 102: Closing the switch S4, S5, access to the icebreaking system and constitute a wire

[0034] Step 103: B2B-MMC switches to the mean pattern;

[0035] Step 104: Calculating the current required for ice;

[0036] Step 105: Depending on the frequency of the frequency parameters and the ratio of the ice transformer;

[0037] Step 106: After the end of the ice, the B2B-MMC is coordinated with the line switch to switch to the flexible interconnection mode;

[0038] In step 101, when the ice de...

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Abstract

The invention discloses an alternating-current ice melting device and method for continuously adjusting the voltage frequency of multiple branches of a distribution network. The alternating-current ice melting device comprises a B2B-MMC converter; the input end of the B2B-MMC converter is connected with an AC bus end; the output end of the B2B-MMC converter is connected with an ice melting transformer; and the output end of the deicing transformer is connected with a line to be deiced. The problems that at the present stage, the number of branch breakers of a distribution network line is large, and direct-current ice melting is not easy to carry out are solved, and the ice melting efficiency of the distribution network line is improved.

Description

technical field [0001] The invention belongs to the technical field of deicing of power transmission lines, and in particular relates to an AC deicing device and method for continuously adjustable multi-branch voltage frequency of a distribution network. [0002] technical background [0003] At present, the ice melting methods of 10kV overhead lines mainly adopt DC ice melting and machine ice melting. Among them, the range of DC ice melting in multi-branch lines of the distribution network is relatively limited, and it is difficult to effectively melt the other side of the branch line including the transformer. ice. The ice melting efficiency of machine ice melting is relatively low, and it is difficult to melt ice on multi-branch lines of the distribution network at the same time during the ice covering period, requiring a large number of cooperative operators. For the current situation of ice melting of distribution network lines, the above ice melting methods are difficu...

Claims

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Application Information

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IPC IPC(8): H02G7/16H02G1/02H02J3/02
CPCH02G7/16H02G1/02H02J3/02
Inventor 班国邦余云雯杨荣袁旭峰吕黔苏马晓红杨旗张露松邹雕许逵杨文勇刘丽
Owner GUIZHOU POWER GRID CO LTD
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