CN220964390U - Electric ship electrical protection system - Google Patents
Electric ship electrical protection system Download PDFInfo
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- CN220964390U CN220964390U CN202322292365.3U CN202322292365U CN220964390U CN 220964390 U CN220964390 U CN 220964390U CN 202322292365 U CN202322292365 U CN 202322292365U CN 220964390 U CN220964390 U CN 220964390U
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- 24vdc
- power supply
- busbar
- lead
- acid battery
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- 238000002955 isolation Methods 0.000 claims abstract description 54
- 239000002253 acid Substances 0.000 claims abstract description 40
- 238000009413 insulation Methods 0.000 claims description 3
- 101100408454 Arabidopsis thaliana PLC6 gene Proteins 0.000 description 8
- 230000005611 electricity Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses an electric ship electrical protection system, which belongs to the technical field of electrical protection and comprises a 24V lead-acid battery, a 220VAC/24VDC lead-acid battery charger, a 220VAC/24VDC isolation power supply, a 24VDC/24VDC isolation power supply, an industrial communication gateway, a PLC (programmable logic controller) and a DC/AC daily inverter, wherein the negative electrode of the input end of the 220VAC/24VDC isolation power supply is electrically connected with a component grounded by the negative electrode, and the component grounded is arranged on an insulating cabinet body. By the mode, when the live wire of the alternating current power supply is grounded, the 220VAC/24VDC power supply and the 24VDC/24VDC power supply are in an isolated power supply mode, and the negative electrode is electrically insulated from the ground device, so that the faults of the devices electrically connected with the 24VDC busbar a and the 24VDC busbar b are effectively prevented.
Description
Technical Field
The utility model relates to the technical field of electric protection, in particular to an electric ship electric protection system.
Background
In the technical field of electric ship electrical protection, the electrical protection measures generally adopted are overcurrent protection, undercurrent protection, overvoltage protection, undervoltage protection, short circuit protection, electromagnetic shielding, grounding, electrical isolation, insulation and the like, and different electrical systems need to take corresponding protection measures.
The industrial gateway with the negative pole to the ground and the like are applied to an electric ship, if the negative pole of the low-voltage busbar is grounded, the lead-acid battery charger is not electrically isolated, when the shell collision of a live wire occurs on the secondary side of a transformer on the output side of a DC/AC daily inverter in the system, the live wire of the shell is connected with the negative pole of the low-voltage busbar, and as the low-voltage power supply is not electrically isolated, the other live wire of the secondary side alternating current of the transformer is connected with the positive pole of the low-voltage busbar in series through the charger and the low-voltage power supply, so that the low-voltage components at the low-voltage busbar are damaged.
Based on this, the present utility model has devised an electric ship electrical protection system to solve the above-mentioned problems.
Disclosure of utility model
In view of the above-mentioned shortcomings of the prior art, the present utility model provides an electric ship electrical protection system.
In order to achieve the above purpose, the utility model is realized by the following technical scheme:
The utility model provides an electric ship electrical protection system, including lead acid battery, lead acid battery charging machine, isolated power supply I, isolated power supply II, industry communication gateway, PLC and DC/AC daily inverter, the output of DC/AC daily inverter is connected with the input electricity of isolated transformer, the output of isolated transformer is connected with female row one electricity, lead acid battery charging machine and isolated power supply I's input all are connected with female row one electricity, and lead acid battery charging machine and isolated power supply one are parallelly connected, lead acid battery and female row two electricity are connected, lead acid battery charging machine's output, isolated power supply two's input all is connected with female row two electricity, isolated power supply two and isolated power supply one's output all are connected with female row three electricity, and isolated power supply one and isolated power supply two are parallelly connected, industry communication gateway and PLC's input all are connected with female row three electricity, and industry communication gateway and PLC are parallelly connected, the negative pole of isolated power supply one input is connected with the grounded components and parts, install on the insulator.
Furthermore, the output ends of the first isolation power supply and the second isolation power supply are connected in series with a group of diodes, and the cathodes of the diodes are electrically connected with the busbar III.
Further, the industrial communication gateway and the PLC are installed on an insulating device.
Still further, the lead acid battery is a 24V lead acid battery.
Further, the lead-acid battery charger is a 220VAC/24VDC lead-acid battery charger.
Still further, the isolated power supply one is a 220VAC/24VDC isolated power supply.
Still further, the second isolated power supply is a 24VDC/24VDC isolated power supply.
Further, the isolation transformer is a 380V/220V isolation transformer.
Further, the first busbar is a 220VAC busbar; the second busbar is 24VDC busbar a; busbar three is 24VDC busbar b.
Advantageous effects
The utility model outputs three-phase 50Hz and 380V alternating current through a DC/AC daily inverter, outputs the three-phase 50Hz and 380V alternating current to a 220VAC/24VDC isolation power supply and a 220VAC/24VDC lead-acid battery charger through a 380V/220V isolation transformer, the 220VAC/24VDC isolation power supply converts the 220V alternating current into 24V direct current and outputs the 24V direct current to an industrial communication gateway and a PLC, the 220VAC/24VDC lead-acid battery charger converts the 220V alternating current into 24V direct current and outputs the 24V direct current to the 24VDC/24VDC isolation power supply, the 24VDC/24VDC isolation power supply transmits the 24V direct current to the industrial communication gateway and the PLC, and the 220VAC/24VDC lead-acid battery charger can charge the 24V lead-acid battery; when the DC/AC daily inverter cannot supply power, the output voltage of the 24V lead-acid battery is transmitted to the industrial communication gateway and the PLC through the 24VDC/24VDC isolation power supply, the 220VAC/24VDC isolation power supply and the 24VDC/24VDC isolation power supply are mutually standby power supplies, the industrial communication gateway and the PLC are ensured to continuously work, when an alternating current power supply live wire is grounded, the 220VAC/24VDC power supply and the 24VDC/24VDC power supply adopt the form of the isolation power supply, and a negative electrode is electrically insulated to a ground device, so that the faults of components electrically connected with the 24VDC busbar a and the 24VDC busbar b are effectively prevented.
According to the utility model, the output ends of the 220VAC/24VDC isolation power supply and the 24VDC/24VDC isolation power supply are respectively connected in series with the diodes, so that the circulation caused by the deviation of the output voltages of the two power supplies is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is evident that the drawings in the following description are only some embodiments of the present utility model and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 is a schematic electrical block diagram of embodiment 1 of the present utility model.
Reference numerals in the drawings represent respectively:
1. 24V lead acid battery; 2. 220VAC/24VDC lead-acid battery charger; 3. 220VAC/24VDC isolated power supply; 4. 24VDC/24VDC isolated power supply; 5. an industrial communication gateway; 6. a PLC; 7. DC/AC daily inverter.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present utility model more clear, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. 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 is further described below with reference to examples.
Example 1
Referring to fig. 1 of the specification, an electric ship electrical protection system comprises a 24V lead-acid battery 1, a 220VAC/24VDC lead-acid battery charger 2, a 220VAC/24VDC isolated power supply 3, a 24VDC/24VDC isolated power supply 4, an industrial communication gateway 5, a PLC6 and a DC/AC daily inverter 7; the output end of the DC/AC daily inverter 7 is electrically connected with the input end of a 380V/220V isolation transformer, the output end of the 380V/220V isolation transformer is electrically connected with a 220VAC busbar, the input ends of the 220VAC/24VDC lead-acid battery charger 2 and the 220VAC/24VDC isolation power supply 3 are electrically connected with the 220VAC busbar, the 220VAC/24VDC lead-acid battery charger 2 and the 220VAC/24VDC isolation power supply 3 are connected in parallel, the 24V lead-acid battery 1 and the 24VDC busbar a are electrically connected, the output ends of the 220VAC/24VDC lead-acid battery charger 2 and the 24VDC/24VDC isolation power supply 4 are electrically connected with a 24VDC busbar a, the output ends of the 24VDC/24VDC isolation power supply 4 and the 220VAC/24VDC isolation power supply 3 are electrically connected with a 24VDC busbar b in parallel, the input ends of the industrial communication gateway 5 and the PLC6 are electrically connected with the 24 VAC busbar b in parallel, the industrial communication gateway 5 and the PLC6 are connected with the negative electrode of the 220/24 VDC isolation power supply 3 in parallel, and the negative electrode of the device is connected with the ground.
The DC/AC daily inverter 7 outputs three-phase 50Hz and 380V alternating current, the three-phase 50Hz and 380V alternating current is output to the 220VAC/24VDC isolation power supply 3 and the 220VAC/24VDC lead-acid battery charger 2 through the 380V/220V isolation transformer, the 220VAC/24VDC isolation power supply 3 converts the 220V alternating current into 24V direct current and outputs the 24V direct current to the industrial communication gateway 5 and the PLC6, the 220VAC/24VDC lead-acid battery charger 2 converts the 220V alternating current into 24V direct current and outputs the 24VDC/24VDC isolation power supply 4, the 24VDC/24VDC isolation power supply 4 transmits the 24V direct current to the industrial communication gateway 5 and the PLC6, and the 220VAC/24VDC lead-acid battery charger 2 can also charge the 24V lead-acid battery 1; when the DC/AC daily inverter 7 cannot supply power, the output voltage of the 24V lead-acid battery 1 is transmitted to the industrial communication gateway 5 and the PLC6 through the 24VDC/24VDC isolation power supply 4, and the 220VAC/24VDC isolation power supply 3 and the 24VDC/24VDC isolation power supply 4 are standby power supplies to ensure that the industrial communication gateway 5 and the PLC6 continuously work.
When the live wire of the alternating current power supply is grounded, the 220VAC/24VDC power supply and the 24VDC/24VDC power supply adopt the form of an isolated power supply, and the negative electrode grounding device adopts an electric insulation mode, so that the faults of components electrically connected with the 24VDC busbar a and the 24VDC busbar b are effectively prevented.
Example 2
In some embodiments, as shown in FIG. 1, as a preferred embodiment of the present utility model, the outputs of the 220VAC/24VDC isolation power supply 3 and the 24VDC/24VDC isolation power supply 4 are each connected in series with a set of diodes having their cathodes electrically connected to the 24VDC busbar b;
The output ends of the 220VAC/24VDC isolation power supply 3 and the 24VDC/24VDC isolation power supply 4 are respectively connected with diodes in series, so that the circulation caused by the deviation of output voltages of the two power supplies is avoided.
Example 3
In some embodiments, as shown in fig. 1, as a preferred embodiment of the present utility model, the industrial communication gateway 5 and the PLC6 are mounted on an insulating device.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (9)
1. The utility model provides an electric ship electrical protection system, includes lead acid battery (1), lead acid battery charger (2), isolation power supply one, isolation power supply two, industry communication gateway (5), PLC (6) and DC/AC daily inverter (7), its characterized in that: the output end of the DC/AC daily inverter (7) is electrically connected with the input end of the isolation transformer, the output end of the isolation transformer is electrically connected with the busbar I, the input ends of the lead-acid battery charger (2) and the isolation power supply I are electrically connected with the busbar I, the lead-acid battery charger (2) is connected with the isolation power supply I in parallel, the output end of the lead-acid battery charger (2) and the input end of the isolation power supply II are electrically connected with the busbar II, the output ends of the isolation power supply II and the isolation power supply I are electrically connected with the busbar III, the isolation power supply I and the isolation power supply II are connected in parallel, the input ends of the industrial communication gateway (5) and the PLC (6) are electrically connected with the busbar III, the negative electrode of the isolation power supply I is electrically connected with the element of the negative electrode grounding, and the element of the ground is installed on the insulation cabinet.
2. The electric ship electrical protection system of claim 1, wherein the output ends of the first and second isolation power supplies are connected in series with a set of diodes, and the cathodes of the diodes are electrically connected with the busbar three.
3. An electric ship electrical protection system according to claim 2, characterized in that the industrial communication gateway (5) and PLC (6) are mounted on insulating means.
4. An electric ship electrical protection system according to claim 3, characterized in that the lead-acid battery (1) is a 24V lead-acid battery.
5. The electric ship electrical protection system of claim 4, wherein the lead-acid battery charger (2) is a 220VAC/24VDC lead-acid battery charger.
6. The electric ship electrical protection system of claim 5, wherein the isolated power source one is a 220VAC/24VDC isolated power source.
7. The electric ship electrical protection system of claim 6, wherein the second isolated power source is a 24VDC/24VDC isolated power source.
8. The electric ship electrical protection system of claim 7, wherein the isolation transformer is a 380V/220V isolation transformer.
9. The electric ship electrical protection system of claim 8, wherein the busbar one is a 220VAC busbar; the second busbar is 24VDC busbar a; busbar three is 24VDC busbar b.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322292365.3U CN220964390U (en) | 2023-08-25 | 2023-08-25 | Electric ship electrical protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322292365.3U CN220964390U (en) | 2023-08-25 | 2023-08-25 | Electric ship electrical protection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220964390U true CN220964390U (en) | 2024-05-14 |
Family
ID=91014721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322292365.3U Active CN220964390U (en) | 2023-08-25 | 2023-08-25 | Electric ship electrical protection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220964390U (en) |
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2023
- 2023-08-25 CN CN202322292365.3U patent/CN220964390U/en active Active
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