CN221170075U - Fan control circuit in rectification transformer substation - Google Patents
Fan control circuit in rectification transformer substation Download PDFInfo
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- CN221170075U CN221170075U CN202323111887.5U CN202323111887U CN221170075U CN 221170075 U CN221170075 U CN 221170075U CN 202323111887 U CN202323111887 U CN 202323111887U CN 221170075 U CN221170075 U CN 221170075U
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- 238000011065 in-situ storage Methods 0.000 claims description 9
- 239000007789 gas Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 3
- 206010003497 Asphyxia Diseases 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 206010021143 Hypoxia Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
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- 239000003440 toxic substance Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
The utility model discloses a fan control circuit in a rectification transformer substation, which relates to the technical field of fan control and comprises the following components: the system comprises a time control switch, a plurality of fans connected in parallel and a plurality of fan control modules connected in parallel; each fan control module comprises a first change-over switch, an on-site control branch and a remote control branch, wherein the remote control branch comprises a second change-over switch, an automatic control branch and a manual control branch, the first change-over switch is used for selecting to close the on-site control branch or the remote control branch, the second change-over switch is used for selecting to close the automatic control branch or the manual control branch, the on-site control branch is used for controlling the start and stop of a fan on site, and the remote control branch is used for remotely controlling the start and stop of the fan; when the first transfer switch in the ith fan control module is closed to close the remote control branch, and the second transfer switch is closed to automatically control the branch, the start and stop of the ith fan are controlled through the time control switch. The utility model improves the automation level of fan control.
Description
Technical Field
The utility model relates to the technical field of fan control, in particular to a fan control circuit in a rectification transformer substation.
Background
The electrolytic aluminum rectifying transformer substation uses gas-insulated closed combined electrical equipment (Gas Insulated Switchgear, GIS) with 17 intervals, and SF6 gas of 0.4MP and 0.6MP is filled in the transformer substation, so that once SF6 leaks, the risk is high that inspection workers are choked. SF6 gas is an inert chemical gas, has stable properties at normal temperature, is colorless, odorless, nontoxic, noncorrosive, nonflammable and non-explosive, but can be inhaled in a large amount to cause suffocation due to oxygen deficiency, and is easy to generate toxic substances under the action of electric arcs. Because SF6 is 5 times heavier than air, when SF6 equipment leaks seriously, a large amount of SF6 gas fills into a distribution room, a cable trench or the ground, and is gradually piled up from low to high, so that the air in the concave space is completely squeezed away. At this time, if someone enters the distribution room and the cable trench to work, a large amount of SF6 gas is sucked, and the potential danger for entering field staff is increased due to the overlong stay time.
Currently, when SF6 electrical equipment is operated indoors, the relative humidity of the surrounding environment should be no more than 80% when the equipment is filled with SF6 gas, and a ventilation system should be opened to prevent SF6 gas from leaking to the working area. The SF6 gas content in the air of the working area must not exceed 1000UL/L, the staff enters the SF6 distribution room, if there is no SF6 gas content display in the entrance, should ventilate for 15 minutes first, and measure SF6 gas content qualification with the leak detector.
In view of the foregoing, there is a need for eliminating the risk caused by SF6 leakage and improving the automation control level of the suction type axial flow fan in the GIS station of the electrolytic aluminum rectifying transformer substation.
Disclosure of utility model
The utility model aims to provide a fan control circuit in a rectification transformer substation, which improves the automation level of fan control.
In order to achieve the above object, the present utility model provides the following solutions:
A fan control circuit in a rectifier substation, comprising: the device comprises a time control switch, a plurality of fans connected in parallel and a plurality of fan control modules connected in parallel, wherein the fans correspond to the fan control modules one by one, and the time control switch is used for setting the starting time; each fan control module comprises a first change-over switch, an on-site control branch and a remote control branch, wherein the remote control branch comprises a second change-over switch, an automatic control branch and a manual control branch, the first change-over switch is used for closing the on-site control branch or the remote control branch, the second change-over switch is used for closing the automatic control branch or the manual control branch, the on-site control branch is used for controlling the start and stop of a fan on site, and the remote control branch is used for remotely controlling the start and stop of the fan; when the first transfer switch in the ith fan control module is closed to be the remote control branch and the second transfer switch is closed to be the automatic control branch, the start and stop of the fans corresponding to the ith fan control module are controlled through the time control switch, i is an integer from 1 to N, and N is the number of the fans.
Optionally, each of the first transfer switches includes a first common terminal, a first connection terminal and a second connection terminal, and each of the second transfer switches includes a second common terminal, a third connection terminal and a fourth connection terminal; each fan control module further comprises a first contactor, wherein the first contactor is used for controlling the start and stop of the fan;
In the ith fan control module, the live wire is connected to the first common end, the second common end is connected to the first link, the second link is connected the one end of local control branch road, the one end of automatic control branch road is connected to the third link, the fourth link is connected the one end of manual control branch road, the other end of local control branch road, the other end of automatic control branch road and the other end of manual control branch road all with the one end of the coil of first contactor is connected, the zero line is connected to the other end of the coil of first contactor.
Optionally, a second contactor is further included; each automatic control branch comprises a second contact switch of the second contactor, the second contact switch is a normally open contact of the second contactor, one end of the second contact switch is connected with the third connecting end, and the other end of the second contact switch is connected with one end of a coil of the first contactor;
One end of the time control switch is connected with a third connecting end in the 1 st fan control module, the other end of the time control switch is connected with one end of the coil of the second contactor, and the other end of the coil of the second contactor is connected with a zero line.
Optionally, the connection points of the other end of the local control branch, the other end of the automatic control branch and the other end of the manual control branch are marked as a common connection point, and a scram switch is connected between the common connection point and the coil of the first contactor.
Optionally, a thermal relay is connected between the coil of the first contactor and the zero line.
Optionally, the on-times of the timed switch settings include 9 periods of time, 1:00 to 1:15, 4:00 to 4:15, 6:00 to 6:15, 8:00 to 8:15, 11:00 to 11:15, 14:00 to 14:15, 16:00 to 16:15, 19:00 to 19:15, and 23:00 to 3:15, respectively.
Optionally, the in-situ control branch comprises a first stop switch and a first start switch connected in series, the first start switch is connected in parallel with a first contact switch of the first contactor, and the first contact switch is a normally open contact of the first contactor;
The manual control branch circuit comprises a second stop switch and a second start switch which are connected in series, the second start switch is connected with a first contact switch of the first contactor in parallel, and the first contact switch is a normally open contact of the first contactor.
Optionally, the fan is an aspiration axial flow fan.
According to the specific embodiment provided by the utility model, the utility model discloses the following technical effects:
According to the utility model, the starting time is set through the time control switch, so that the remote timing switch control of a plurality of fans is realized, the automation level of fan control is improved, and the risk brought by SF6 leakage in the rectification transformer substation is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a fan control circuit in a rectifier substation;
FIG. 2 is a schematic diagram of a plurality of fans connected in parallel;
Fig. 3 is a schematic structural diagram of a 1 st fan control module and a 2 nd fan control module provided by the utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model aims to provide a fan control circuit in a rectification transformer substation, which improves the automation level of fan control.
In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1 to 3, the fan control circuit in a rectification substation provided by the utility model comprises: the device comprises a time control switch, a plurality of fans connected in parallel and a plurality of fan control modules connected in parallel, wherein the fans correspond to the fan control modules one by one, and the time control switch is used for setting the starting time; each fan control module comprises a first change-over switch, an on-site control branch and a remote control branch, wherein the remote control branch comprises a second change-over switch, an automatic control branch and a manual control branch, the first change-over switch is used for closing the on-site control branch or the remote control branch, the second change-over switch is used for closing the automatic control branch or the manual control branch, the on-site control branch is used for controlling the start and stop of a fan on site, and the remote control branch is used for remotely controlling the start and stop of the fan; when the first transfer switch in the ith fan control module is closed to be the remote control branch and the second transfer switch is closed to be the automatic control branch, the start and stop of the fans corresponding to the ith fan control module are controlled through the time control switch, i is an integer from 1 to M, and M is the number of the fans.
The number of fans is determined according to the area size of the rectification transformer substation, and M is an integer greater than 1.
Each first transfer switch comprises a first common end, a first connecting end and a second connecting end, and each second transfer switch comprises a second common end, a third connecting end and a fourth connecting end; each fan control module comprises a first contactor, and the first contactor is used for controlling the start and stop of the fan.
In the ith fan control module, the live wire is connected to the first common end, the second common end is connected to the first link, the second link is connected the one end of local control branch road, the one end of automatic control branch road is connected to the third link, the fourth link is connected the one end of manual control branch road, the other end of local control branch road, the other end of automatic control branch road and the other end of manual control branch road all with the one end of the coil of first contactor is connected, the zero line is connected to the other end of the coil of first contactor.
The fan control circuit in the rectification transformer substation further comprises a second contactor; each automatic control branch circuit comprises a second contact switch of the second contactor, the second contact switch is a normally open contact of the second contactor, one end of the second contact switch is connected with the third connecting end, and the other end of the second contact switch is connected with one end of a coil of the first contactor.
One end of the time control switch is connected with a third connecting end in the 1 st fan control module, the other end of the time control switch is connected with one end of the coil of the second contactor, and the other end of the coil of the second contactor is connected with a zero line.
And the other end of the local control branch, the other end of the automatic control branch and the connection point of the other end of the manual control branch are marked as a common connection point, and a scram switch is connected between the common connection point and the coil of the first contactor.
And a thermal relay is connected between the coil of the first contactor and the zero line.
The time control switch is automatically conducted in the set opening time range, and is automatically disconnected when the time control switch exceeds the set opening time range.
The on-time of the timed switch settings includes 9 periods of time, 1:00 to 1:15, 4:00 to 4:15, 6:00 to 6:15, 8:00 to 8:15, 11:00 to 11:15, 14:00 to 14:15, 16:00 to 16:15, 19:00 to 19:15, and 23:00 to 3:15, respectively.
In any time period of 9, the time control switch can be started to be conducted, and the fan is started for 15 minutes.
For example: the time-controlled switch is turned on at 1:00 and turned off at 1:15.
The time control switch specifically adopts a KG316T microcomputer time control switch.
The in-situ control branch circuit comprises a first stop switch and a first start switch which are connected in series, wherein the first start switch is connected with a first contact switch of the first contactor in parallel, and the first contact switch is a normally open contact of the first contactor.
The manual control branch circuit comprises a second stop switch and a second start switch which are connected in series, the second start switch is connected with a first contact switch of the first contactor in parallel, and the first contact switch is a normally open contact of the first contactor.
The fan control circuit in the rectification substation is applied to a gas insulation substation, particularly a 220kV rectification substation, and is used for reducing risks caused by SF6 leakage in the rectification substation.
In this embodiment, 14 fans are total, so 14 fan control modules are required, and each fan control module correspondingly controls one fan.
In fig. 2, L1, L2 and L3 represent three-phase live wires, N represents zero lines, QF is a main breaker, and is used for controlling whether to provide power for all fans, QF1, QF2 and QF14 are respectively the breakers of the 1# fans, the breakers of the 2# fans, the breakers of the 14# fans, KM1, KM2 and KM14 are respectively the first contactors of the 1# fans, the first contactors of the 2# fans, the first contactors of the 14# fans, FR1, FR2 and FR14 are respectively the thermal relays corresponding to the 1# fans, the thermal relays corresponding to the 2# fans and the thermal relays corresponding to the 14# fans.
A fuse FU is also connected between the fire wire and each fan control module in fig. 1.
In this embodiment, an in-situ control box is used to implement the function of an in-situ control branch, and the in-situ control box is built with 1 remote/in-situ two-gear change-over switch (first change-over switch), 1 scram button, 1 start button (first start switch) and 1 stop button (first stop switch).
In fig. 3, ZK1 is a first switch of a1 st fan control module (1 # fan control in fig. 3), XK1 is a second switch of the 1 st fan control module, ZK2 is a first switch of a2 nd fan control module (2 # fan control in fig. 3), XK2 is a second switch of the 2 nd fan control module, JT1 is a scram switch in the 1 st fan control module, and JT2 is a scram switch in the 2 nd fan control module.
In this embodiment, the remote control box is used to implement the function of the remote control branch, and the remote control box has 2 automatic/manual change-over switches (second change-over switches), 14 start buttons (second start switches), 14 stop buttons (second stop switches), 14 groups of start/stop buttons, 1 start button and 1 stop button in each group.
In this embodiment, 8 pairs of terminals are provided for each automatic/manual switch body, and 16 pairs of terminals are used in cooperation with two switches (14 pairs of terminals are only needed for 14 control loops in this embodiment, and two pairs are redundant). When the second transfer switch is switched to the manual position, all odd terminals are turned on. When the second transfer switch is switched to the automatic position, all even terminals are turned on.
In the embodiment, the number of normally open points (first contact switches) of the control relay is increased to 14 by using the control relay and adding the normally open auxiliary contacts, and 14 control loops are automatically controlled through the 14 normally open points.
The control process is described in detail below.
1. In-situ model (taking 1# fan control as an example), the fan control module corresponding to the 1# fan is the 1 st fan control module:
The remote/on-site switch on the on-site control box of the axial flow fan is switched to the on-site position.
At the moment, the first starting switch SB1-4 is pressed, the KM1 coil is electrified, and the normally open contact of the first contact switch is self-locked to form self-holding. The fan main circuit of the No. 1 fan is connected, and the fan operates. The KM1 coil is a coil of the first contactor.
The first stop switch SB1-3 is pressed, the KM1 coil is deenergized, and the fan is stopped.
Pressing the emergency stop button, powering down the KM1 coil, and stopping the fan. And the emergency stop button keeps in place after being pressed down, and the fan cannot be started again before being reset.
When the fan is overloaded, the thermal relay FR1 is operated, and the fan is stopped.
2. Remote model:
The remote/on-site switch on the on-site control box of the axial flow fan is switched to a remote location.
When the local control box change-over switch is switched to a remote place, two selection states can be generated in the remote control box in the master control room at the moment: manual and automatic.
1) In manual mode:
When the two automatic/manual change-over switches of the remote control box are simultaneously switched to the manual position, 14 groups of manual control buttons on the remote control box can be respectively pressed to control the corresponding axial flow fans to start, and the stop buttons of each group are pressed to control the corresponding axial flow fans to stop.
In the remote-manual mode: the SB1-1 is pressed, the KM1 coil is electrified, and the normally open point of the KM1 coil is self-locked to form self-holding. The fan main circuit of the No. 1 fan is connected, and the fan operates.
Pressing SB1-2, the KM1 coil loses power, and the blower stops.
Pressing the emergency stop button, powering down the KM1 coil, and stopping the fan. And the emergency stop button keeps in place after being pressed down, and the fan cannot be started again before being reset.
When the fan is overloaded, the thermal relay FR1 is operated, and the fan is stopped.
2) The automatic mode is as follows:
When two automatic/manual change-over switches of the remote control box are simultaneously switched to manual positions, all automatic control loops of 14 groups of fans are simultaneously switched on by the automatic/manual change-over switches (each automatic/manual change-over switch is provided with 8 pairs of contacts, two simultaneous cooperation use total 16 pairs of contacts, 14 groups of fans use total 14 pairs of contacts, and the rest two pairs of contacts are standby)
In the remote-auto mode: the time control switch is automatically turned on when the time reaches within 9 time periods set.
At this time, the second contactor (KM 33 coil) is powered on, and the normally open contacts KM33 in the 1#, 2#, … … # automatic control branches are closed simultaneously, at this time KM1, KM2 … … KM14 are powered on simultaneously, that is, the coils of the first contactor in each fan control module are powered on simultaneously, that is, all the 1#, 2#, … … # fans are started simultaneously.
When the time control switch is started for 15 minutes, the fan is automatically closed, and all fans are automatically stopped.
During the process, if an emergency is met, a worker at the local control box of the on-site fan presses the emergency stop button, and the corresponding axial flow fan stops.
During the period, an overload occurs on a certain fan, the corresponding thermal relay FR acts, and the fan stops.
The utility model can control the start and stop of the axial flow fan in the GIS station on site, can also control the start and stop of the axial flow fan in the master control room by remote manual operation, can also control the start and stop of the axial flow fan in an automatic fixed time period, can increase the automation level of the GIS station and eliminate the safety risk of suffocation of patrol personnel caused by SF6 leakage.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The principles and embodiments of the present utility model have been described herein with reference to specific examples, the above examples being provided only to assist in understanding the circuitry of the present utility model and its core ideas; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the utility model.
Claims (8)
1. A fan control circuit in a rectification substation, comprising: the device comprises a time control switch, a plurality of fans connected in parallel and a plurality of fan control modules connected in parallel, wherein the fans correspond to the fan control modules one by one, and the time control switch is used for setting the starting time; each fan control module comprises a first change-over switch, an on-site control branch and a remote control branch, wherein the remote control branch comprises a second change-over switch, an automatic control branch and a manual control branch, the first change-over switch is used for closing the on-site control branch or the remote control branch, the second change-over switch is used for closing the automatic control branch or the manual control branch, the on-site control branch is used for controlling the start and stop of a fan on site, and the remote control branch is used for remotely controlling the start and stop of the fan; when the first transfer switch in the ith fan control module is closed to be the remote control branch and the second transfer switch is closed to be the automatic control branch, the start and stop of the fans corresponding to the ith fan control module are controlled through the time control switch, i is an integer from 1 to M, and M is the number of the fans.
2. The rectifier substation internal fan control circuit of claim 1, wherein each of the first transfer switches includes a first common terminal, a first connection terminal, and a second connection terminal, and each of the second transfer switches includes a second common terminal, a third connection terminal, and a fourth connection terminal; each fan control module further comprises a first contactor, wherein the first contactor is used for controlling the start and stop of the fan;
In the ith fan control module, the live wire is connected to the first common end, the second common end is connected to the first link, the second link is connected the one end of local control branch road, the one end of automatic control branch road is connected to the third link, the fourth link is connected the one end of manual control branch road, the other end of local control branch road, the other end of automatic control branch road and the other end of manual control branch road all with the one end of the coil of first contactor is connected, the zero line is connected to the other end of the coil of first contactor.
3. The rectifier substation internal fan control circuit of claim 2, further comprising a second contactor; each automatic control branch comprises a second contact switch of the second contactor, the second contact switch is a normally open contact of the second contactor, one end of the second contact switch is connected with the third connecting end, and the other end of the second contact switch is connected with one end of a coil of the first contactor;
One end of the time control switch is connected with a third connecting end in the 1 st fan control module, the other end of the time control switch is connected with one end of the coil of the second contactor, and the other end of the coil of the second contactor is connected with a zero line.
4. The rectifier substation internal fan control circuit according to claim 2, wherein the connection points of the other end of the local control branch, the other end of the automatic control branch and the other end of the manual control branch are denoted as a common connection point, and an emergency stop switch is connected between the common connection point and the coil of the first contactor.
5. The rectifier substation internal fan control circuit according to claim 2, wherein a thermal relay is connected between the coil of the first contactor and the zero line.
6. The internal fan control circuit of claim 1, wherein the time-controlled switch sets an on-time comprising 9 periods of time of 1:00 to 1:15, 4:00 to 4:15, 6:00 to 6:15, 8:00 to 8:15, 11:00 to 11:15, 14:00 to 14:15, 16:00 to 16:15, 19:00 to 19:15, and 23:00 to 3:15, respectively.
7. The in-situ control circuit of a fan in a rectifier substation of claim 2, wherein the in-situ control branch comprises a first stop switch and a first start switch in series, the first start switch being in parallel with a first contact switch of the first contactor, the first contact switch being a normally open contact of the first contactor;
The manual control branch circuit comprises a second stop switch and a second start switch which are connected in series, the second start switch is connected with a first contact switch of the first contactor in parallel, and the first contact switch is a normally open contact of the first contactor.
8. The rectifier substation internal fan control circuit of claim 1, wherein the fan is an aspiration type axial flow fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323111887.5U CN221170075U (en) | 2023-11-17 | 2023-11-17 | Fan control circuit in rectification transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323111887.5U CN221170075U (en) | 2023-11-17 | 2023-11-17 | Fan control circuit in rectification transformer substation |
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| Publication Number | Publication Date |
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| CN221170075U true CN221170075U (en) | 2024-06-18 |
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| CN202323111887.5U Active CN221170075U (en) | 2023-11-17 | 2023-11-17 | Fan control circuit in rectification transformer substation |
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| CN (1) | CN221170075U (en) |
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2023
- 2023-11-17 CN CN202323111887.5U patent/CN221170075U/en active Active
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