CN220985330U - Low-voltage pre-magnetizing device for daily transformer of wind power installation platform - Google Patents
Low-voltage pre-magnetizing device for daily transformer of wind power installation platform Download PDFInfo
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- CN220985330U CN220985330U CN202322965496.3U CN202322965496U CN220985330U CN 220985330 U CN220985330 U CN 220985330U CN 202322965496 U CN202322965496 U CN 202322965496U CN 220985330 U CN220985330 U CN 220985330U
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Abstract
The utility model discloses a low-voltage pre-magnetizing device for a daily-use transformer of a wind power installation platform, which comprises a plurality of daily-use transformers, wherein the daily-use transformers are connected with a main switchboard, and the low-voltage pre-magnetizing device also comprises a pre-magnetizing mechanism connected with the daily-use transformers; the pre-magnetizing mechanism comprises a pre-magnetizing control loop, a pre-magnetizing transformer, an emergency distribution board, a power distribution box and a plurality of pre-magnetizing transformers; the emergency distribution board is connected with the power distribution box; the number of the pre-magnetizing transformers is matched with the number of the daily-use transformers, and the pre-magnetizing transformers are connected in a one-to-one correspondence manner; the power distribution box is connected with each pre-magnetizing transformer; the pre-charge control loop is used for controlling the phase angle of the main switchboard to be consistent with that of the emergency switchboard. The utility model not only meets the recovery work of the platform power grid, but also reduces the equipment configuration of the high-voltage side, reduces the cost and improves the economy.
Description
Technical Field
The utility model relates to a wind power installation platform, in particular to a daily transformer low-voltage pre-magnetizing device for the wind power installation platform.
Background
With the development of offshore wind power generation, offshore operation tasks are increasingly heavy, the installed capacity is large and integrated, and the capacity of an offshore operation device power grid often cannot meet task requirements. Therefore, in a power system of a large wind power installation platform, the capacity of a transformer connecting a high voltage and a power grid must also be increased to satisfy the power supply of the corresponding equipment. When a large-capacity transformer is connected to a power grid, the no-load switching-on inrush current of the transformer can possibly reach several times or even more than ten times of rated current, and the conditions of tripping of a high-voltage switch, line voltage fluctuation and the like can possibly be caused. However, this solution is costly for the pre-magnetizing transformer and the associated equipment accessories, and the equipment volume also occupies a certain space.
Disclosure of utility model
Aiming at the defects in the prior art, the utility model aims to provide the daily transformer low-voltage pre-magnetizing device for the wind power installation platform, which not only meets the requirements of the recovery work of a platform power grid, but also reduces the equipment configuration of a high-voltage side, reduces the cost and improves the economy.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
A daily transformer low pressure pre-magnetizing device for wind-powered electricity generation mounting platform, includes a plurality of daily transformers, even have main switchboard on the daily transformer, its characterized in that: the pre-magnetizing device is connected with the daily transformer;
The pre-magnetizing mechanism comprises a pre-magnetizing control loop, a pre-magnetizing transformer, an emergency distribution board, a power distribution box and a plurality of pre-magnetizing transformers;
The emergency distribution board is connected with the power distribution box;
The number of the pre-magnetizing transformers is matched with the number of the daily-use transformers, and the pre-magnetizing transformers are connected in a one-to-one correspondence manner;
The power distribution box is connected with each pre-magnetizing transformer;
The pre-charge control loop is used for controlling the phase angle of the main switchboard to be consistent with that of the emergency switchboard.
Preferably, the daily-use transformer is provided with a primary side switch and a secondary side switch;
The main switchboard comprises a medium-voltage switchboard of 6.6kV and a low-voltage switchboard of 400V;
The primary side switch is connected with the medium-voltage distribution board;
the secondary side switch is connected with the low-voltage distribution board and the pre-magnetizing transformer.
Preferably, the pre-charging control loop comprises a PT voltage transformer, a KM contactor and a synchronous relay;
The synchronous relay is arranged between the medium-voltage distribution board and the emergency distribution board;
The busbar voltage sampling of the synchronous relay is connected with the medium-voltage distribution board, and the generator side voltage sampling of the synchronous relay is connected with the emergency distribution board;
The KM contactor is arranged between the daily transformer and the pre-magnetizing transformer;
The PT voltage transformer is arranged between the medium-voltage distribution board and the emergency distribution board.
Preferably, the main switchboard is provided with a main generator;
The emergency distribution board is provided with an emergency parking generator.
According to the low-voltage pre-magnetizing device for the daily-use transformer of the wind power installation platform, provided by the utility model, the secondary side of the daily-use transformer is pre-magnetized, so that a magnetizing loop can adopt a low-voltage device, and the low-voltage pre-magnetizing device is safe, stable, flexible in wiring and economical efficiency is improved; the pre-magnetizing control loop scheme has the advantages of low overall cost, being capable of being installed in a distribution panel in situ, being convenient to replace and maintain, and the like.
Drawings
FIG. 1 is a schematic diagram of a power system of a low voltage pre-magnetizing apparatus for a household transformer of the present utility model;
Fig. 2 is a schematic diagram of a transformer pre-magnetizing principle of the low-voltage pre-magnetizing device of the daily-use transformer;
fig. 3 is a schematic diagram of a control loop of a pre-magnetizing transformer of the low-voltage pre-magnetizing apparatus of the daily-use transformer of the present utility model.
Detailed Description
In order to better understand the above technical solution of the present utility model, the technical solution of the present utility model is further described below with reference to the accompanying drawings and examples.
Referring to fig. 1 and 2, the low-voltage pre-magnetizing device for a daily-use transformer of a wind power installation platform provided by the utility model comprises three daily-use transformers 1, 2 and 3 of 2000kVA, wherein the daily-use transformers 1, 2 and 3 are electrically connected with a main switchboard, and the low-voltage pre-magnetizing device further comprises a pre-magnetizing mechanism connected with the daily-use transformers 1, 2 and 3.
The pre-magnetizing mechanism comprises a pre-magnetizing control loop 13, a 400V emergency distribution board 4, a power distribution box 5 and three 20kVA pre-magnetizing transformers (400V/400V DY 11) 6, 7 and 8.
The emergency distribution board 4 is electrically connected with the power distribution box 5, and an emergency parking generator 9 is arranged on the emergency distribution board 4.
The power distribution box 5 is electrically connected with three pre-magnetizing transformers 6, 7 and 8.
Three 20kVA pre-magnetizing transformers (400V/400V DY 11) 6, 7 and 8 are respectively and correspondingly and electrically connected with three 2000kVA daily transformers 1, 2 and 3.
The precharge control loop 13 is used to control the phase angle of the main switchboard to the emergency switchboard 4.
The main switchboard comprises a medium voltage switchboard 12 of 6.6kV and a low voltage switchboard 10 of 400V.
The three daily-use transformers 1, 2 and 3 are respectively provided with a primary side switch and a secondary side switch, the primary side switch is electrically connected with a 6.6kV medium-voltage distribution board 12, the secondary side switch is electrically connected with a 400V low-voltage distribution board 10, and the secondary side switch is also correspondingly electrically connected with the three pre-magnetizing transformers 6, 7 and 8.
The precharge control loop 13 is used to control the phase angle of the main switchboard to the emergency switchboard 4.
The pre-charge control loop 13 includes a PT voltage transformer 14, KM contactor 15 and a sync relay 11.
The synchronizing relay 11 is provided between the medium voltage distribution board 12 and the emergency distribution board 4.
The busbar voltage sampling of the synchronous relay 11 is electrically connected with the medium voltage distribution board 12 on one side of the daily use transformers 1, 2 and 3, and the generator side voltage sampling of the synchronous relay 11 is connected with the emergency distribution board 4.
KM contactors 15 are provided between the daily transformers 1, 2, 3 and the pre-magnetizing transformers 6, 7, 8.
The PT voltage transformer 14 is provided between the medium voltage distribution board 12 and the emergency distribution board 4.
The specific control operation method comprises the following steps: when switching on the primary side switches of the household transformers 1, 2, 3, it is necessary to ensure that the phase angles of the power supply of the medium voltage switchboard 12 and the power supply of the 400V emergency switchboard 4 are identical. Between the 400V distribution boards, a synchronizing relay 11 is installed, the bus voltage of the synchronizing relay 11 being sampled from the corresponding medium voltage distribution board (6.6 kV/100V PT1) 12, the generator side voltage of the synchronizing relay 11 being sampled from the bus of the 400V emergency distribution board 4 (400V/100V PT2). When the daily-use transformers 1, 2 and 3 are to be switched on and off, the secondary side of the medium-voltage transformer is needed to be pre-magnetized through a 400V main switchboard 10, then the medium-voltage switchboard 12 and a 400V emergency switchboard 4 are synchronized, the frequency of a generator on the 400V switchboard is adjusted, and after the synchronization condition is met, the primary side switches of the medium-voltage daily-use transformers 1, 2 and 3 are switched on and off.
The secondary side switches of the daily-use transformers 1, 2 and 3 of the low-voltage pre-magnetizing device of the daily-use transformer have two power supply sources: firstly, the emergency parking generator 9 supplies power, and secondly, the daily-use transformers 1, 2 and 3 supply power. When the domestic transformer 1, 2, 3 has been de-energized, the power needs to be supplied by the emergency parking generator 9 first if the pre-magnetizing function of this domestic transformer 1, 2, 3 is to be completed. Two cases are as follows:
1) When the daily-use transformer 1 is started (such as recovery of power failure of a whole ship), the pre-magnetizing power supply is powered by the emergency parking generator 9, and the synchronous detection process is needed to be used for reclosing.
2) When the existing daily use transformer 1 is on the net and starts up the daily use transformer 2 or the daily use transformer 3, the pre-magnetizing power is from the daily use transformer 2 or the daily use transformer 3, and is homologous at this time, and the synchronous relay 11 does not need synchronous detection (see fig. 3).
The low-voltage pre-magnetizing device of the daily-use transformer for the wind power installation platform provided by the utility model is adopted to execute the following procedures:
s1, starting switching on of daily transformers 1, 2 and 3, and sending a pre-magnetizing start command to a PLC controller of a main switchboard 10;
S2, after receiving the pre-magnetizing start command, the main switchboard 10 judges and executes a non-homologous magnetizing process or a homologous magnetizing process.
The non-homologous magnetizing process comprises the following steps:
a. the secondary side contactors KM of the pre-magnetizing transformers 6, 7 and 8 are connected to perform pre-magnetizing;
b. After the time delay is 5 seconds, the synchronous relay 11 is started to be connected for synchronization, and the frequency of the emergency parking generator 9 is adjusted to ensure that the phase angle of the emergency parking generator is consistent with that of the main generator;
c. when the synchronous point is detected, the synchronous relay 11 sends a closing command to the primary side switches of the daily transformers 1, 2 and 3;
d. After receiving the closing command, the main switchboard 10 opens the pre-magnetizing starting self-protection loop, and simultaneously sends out closing pulse to close the switches of the daily transformers 1, 2 and 3.
The homologous magnetizing process comprises the following steps:
A. the secondary side contactors KM of the pre-magnetizing transformers 6, 7 and 8 are connected to perform pre-magnetizing;
B. Disconnecting the secondary side contactor KM of the pre-magnetizing transformers 6, 7 and 8 after time delay for 5 s;
C. When the secondary side contactors KM of the pre-magnetizing transformers 6, 7 and 8 are detected to be disconnected, a closing command is sent to the primary side switches of the daily transformers 1, 2 and 3 after time delay of 0.5 s;
D. After receiving the closing command, the main switchboard 10 opens the pre-magnetizing starting self-protection loop, and simultaneously sends out closing pulse to close the switches of the daily transformers 1, 2 and 3.
It will be appreciated by persons skilled in the art that the above embodiments are provided for illustration only and not for limitation of the utility model, and that variations and modifications of the above described embodiments are intended to fall within the scope of the claims of the utility model as long as they fall within the true spirit of the utility model.
Claims (4)
1. A daily transformer low pressure pre-magnetizing device for wind-powered electricity generation mounting platform, includes a plurality of daily transformers, even have main switchboard on the daily transformer, its characterized in that: the pre-magnetizing device is connected with the daily transformer;
The pre-magnetizing mechanism comprises a pre-magnetizing control loop, a pre-magnetizing transformer, an emergency distribution board, a power distribution box and a plurality of pre-magnetizing transformers;
The emergency distribution board is connected with the power distribution box;
The number of the pre-magnetizing transformers is matched with the number of the daily-use transformers, and the pre-magnetizing transformers are connected in a one-to-one correspondence manner;
The power distribution box is connected with each pre-magnetizing transformer;
The pre-charge control loop is used for controlling the phase angle of the main switchboard to be consistent with that of the emergency switchboard.
2. The daily transformer low-voltage pre-magnetizing apparatus for a wind power installation platform according to claim 1, wherein: the daily-use transformer is provided with a primary side switch and a secondary side switch;
The main switchboard comprises a medium-voltage switchboard of 6.6kV and a low-voltage switchboard of 400V;
The primary side switch is connected with the medium-voltage distribution board;
the secondary side switch is connected with the low-voltage distribution board and the pre-magnetizing transformer.
3. The daily transformer low-voltage pre-magnetizing apparatus for a wind power installation platform according to claim 2, wherein: the pre-charging control loop comprises a PT voltage transformer, a KM contactor and a synchronous relay;
The synchronous relay is arranged between the medium-voltage distribution board and the emergency distribution board;
The busbar voltage sampling of the synchronous relay is connected with the medium-voltage distribution board, and the generator side voltage sampling of the synchronous relay is connected with the emergency distribution board;
The KM contactor is arranged between the daily transformer and the pre-magnetizing transformer;
The PT voltage transformer is arranged between the medium-voltage distribution board and the emergency distribution board.
4. The daily transformer low-voltage pre-magnetizing apparatus for a wind power installation platform according to claim 3, wherein: the main switchboard is provided with a main generator;
The emergency distribution board is provided with an emergency parking generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322965496.3U CN220985330U (en) | 2023-11-02 | 2023-11-02 | Low-voltage pre-magnetizing device for daily transformer of wind power installation platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322965496.3U CN220985330U (en) | 2023-11-02 | 2023-11-02 | Low-voltage pre-magnetizing device for daily transformer of wind power installation platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220985330U true CN220985330U (en) | 2024-05-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322965496.3U Active CN220985330U (en) | 2023-11-02 | 2023-11-02 | Low-voltage pre-magnetizing device for daily transformer of wind power installation platform |
Country Status (1)
| Country | Link |
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| CN (1) | CN220985330U (en) |
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2023
- 2023-11-02 CN CN202322965496.3U patent/CN220985330U/en active Active
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