CN215580381U - Shore power system - Google Patents
Shore power system Download PDFInfo
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- CN215580381U CN215580381U CN202121163100.8U CN202121163100U CN215580381U CN 215580381 U CN215580381 U CN 215580381U CN 202121163100 U CN202121163100 U CN 202121163100U CN 215580381 U CN215580381 U CN 215580381U
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Abstract
The utility model discloses a shore power system, which comprises a PLC, a shore power socket box and a shore power box, wherein the shore power socket box is provided with a three-phase four-hole socket, a first jack, a second jack and a third jack of the three-phase four-hole socket are used for being connected with a three-phase line, and a fourth jack is used for being connected with a ground wire; the three-phase four-hole socket is provided with a first switch which is connected in series in a line connected with the fourth jack; the three-phase four-hole socket is also provided with an interlocking protection loop, the interlocking protection loop comprises a second switch, and the second switch is used for short-circuiting the fourth jack; the PLC is connected with the shore power socket box and the shore power box and is used for controlling the connection and disconnection of the first switch and the second switch and controlling the connection and disconnection of shore power through the shore power box.
Description
Technical Field
The embodiment of the utility model relates to the power grid technology, in particular to a shore power system.
Background
The shore power system is a system for stopping the operation of a ship generator and supplying power to a ship side from a shore base side during the docking of a ship. The shore power mainly ensures the electricity for production and life which is still needed on the ship after the ship arrives at a port, the electricity for continuous operation of auxiliary equipment and the like. At present, more and more wharfs have built shore power facilities, but the general types of marine cables are not uniform, some cables adopt three plugs, some cables adopt four plugs, and the existing shore power interfaces cannot be well adapted to cables of different types.
In addition, when shore power needs to be connected, the conventional method is that the generator is shut down, the shore power is transmitted to a ship maintenance power switch, and the switch is closed, so that the ship-mounted equipment is powered on and recovers operation, and therefore seamless butt joint between the shore power and a ship generator set cannot be achieved in the butt joint process, namely a butt joint mode without shutdown is achieved.
SUMMERY OF THE UTILITY MODEL
The utility model provides a shore power system, which aims to achieve the aim that the shore power system can be matched with different types of cable plugs.
The embodiment of the utility model provides a shore power system, which comprises a PLC, a shore power socket box and a shore power box;
the shore power socket box is provided with a three-phase four-hole socket, a first jack, a second jack and a third jack of the three-phase four-hole socket are used for being connected with a three-phase line, and a fourth jack is used for being connected with a ground wire;
the three-phase four-hole socket is provided with a first switch which is connected in series in a line connected with the fourth jack;
the three-phase four-hole socket is also provided with an interlocking protection loop, the interlocking protection loop comprises a second switch, and the second switch is used for short-circuiting the fourth jack;
the PLC is connected with the shore power socket box and the shore power box and is used for controlling the connection and disconnection of the first switch and the second switch and controlling the connection and disconnection of shore power through the shore power box.
Further, a voltage detection unit, a frequency detection unit and a phase sequence detection unit are configured in the shore power box;
the voltage detection unit, the frequency detection unit and the phase sequence detection unit are respectively connected with the PLC and are respectively used for detecting the voltage, the frequency and the phase sequence of the shipborne motor and the shore power motor.
Further, a voltage regulating unit is also configured in the shore power box;
the voltage regulating unit is connected with the PLC and used for regulating the output voltage of the shore power motor.
Further, a first control switch and a second control switch are arranged in the shore power box;
the first control switch and the second control switch are connected with the PLC, and the PLC controls the on-off of the first control switch to enable the shipborne power grid to be connected to or disconnected from the voltage detection unit, the frequency detection unit and the phase sequence detection unit; and the PLC controls the on-off of the second control switch to enable the shore power grid to be connected into or disconnected from the voltage detection unit, the frequency detection unit and the phase sequence detection unit.
Further, the voltage detection unit comprises a first voltage detection module and a second voltage detection module; the frequency detection unit comprises a first frequency detection module and a second frequency detection module; the phase sequence detection unit comprises a first phase sequence detection module and a second phase sequence detection module;
The PLC controls the on-off of the first control switch to enable the shipborne power grid to be connected into or disconnected from the first voltage detection module, the first frequency detection module and the first phase sequence detection module;
and the PLC controls the on-off of the second control switch to enable the shore power grid to be connected into or disconnected from the second voltage detection module, the second frequency detection module and the second phase sequence detection module.
Further, the PLC also comprises a third control switch, and the third control switch is connected with the PLC;
the PLC controls the third control switch to enable the shore power motor to be merged into or quit the shipborne power grid.
Further, a phase detection unit is also configured in the shore power box;
the phase detection unit is connected with the PLC and used for detecting the phases of the output voltages of the shipborne motor and the shore power motor.
Further, a power detection unit is also configured in the shore power box;
the power detection unit is connected with the PLC and used for detecting the output power of the shore power motor.
Further, a rotating speed detection unit is also configured in the shore power box;
the rotation speed detection unit is connected with the PLC and used for detecting the rotation speed of the shore power motor.
Further, a current detection unit is also configured in the shore power box;
the current detection unit is connected with the PLC and used for detecting the output current of the shore power motor.
Compared with the prior art, the utility model has the beneficial effects that: the shore power system provided by the utility model is provided with the PLC, the shore power socket box and the shore power box, wherein the shore power socket box is provided with the controllable first switch, the PLC can enable the shore power socket box to be matched with a three-wire system plug or a four-wire system plug by controlling the on-off of the first switch, the universality of the shore power system is improved, meanwhile, the shore power socket box is also provided with an interlocking protection loop, the interlocking protection loop is provided with the second switch, the interlocking protection loop can be suitable for the detection of the connection state of the three-wire system plug or the four-wire system plug and the socket by controlling the on-off of the second switch, and when the plug is normally connected with the socket, the PL normally executes a preset program, so that the integral reliability of the shore power system can be improved.
Drawings
Fig. 1 is a block diagram of a shore power system configuration in an embodiment;
FIG. 2 is a schematic diagram of a three-phase four-hole jack according to an embodiment;
FIG. 3 is a schematic diagram of an interlock protection circuit according to an embodiment;
FIG. 4 is a block diagram of another shore power system configuration in an embodiment;
FIG. 5 is a block diagram of another shore power system configuration in an embodiment;
fig. 6 is a block diagram of another shore power system structure in the embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a block diagram of a shore power system in an embodiment, fig. 2 is a schematic diagram of a three-phase four-jack socket in an embodiment, fig. 3 is a schematic diagram of an interlocking protection loop in an embodiment, and referring to fig. 1 to 3, the embodiment provides a shore power system including a PLC 100, a shore power socket box 200, and a shore power box 300.
The shore power receptacle box 200 is provided with a three-phase four-jack socket, a first jack XS1, a second jack XS2 and a third jack XS3 of which are used for connecting a three-phase line, and a fourth jack XS4 is used for connecting a ground line;
the three-phase four-jack socket is provided with a first switch K1, the first switch K1 being connected in series in the line connected to the fourth jack XS 4.
The three-phase four-jack socket is further provided with an interlock protection circuit comprising a second switch S1, a second switch S1 for shorting the fourth jack XS 4.
The PLC 100 is connected with the shore power socket box 200 and the shore power box 300, and the PLC 100 is used for controlling the connection and disconnection of the first switch K1 and the second switch S1 and controlling the connection and disconnection of the shore power through the shore power box 300.
Illustratively, in this embodiment, the shore power receptacle box 200 is configured with a separate first switch K1, and when the cable is a three-wire plug, the PLC 100 controls the first switch K1 to open, making the receptacle in the shore power receptacle box 200 act as a three-phase three-wire receptacle, while the PLC 100 controls the second switch S1 to close, shorting the fourth receptacle XS4, so that when the three-wire plug is normally plugged into the receptacle, the PLC 100 can normally perform a preset program, such as controlling the shore power motor M1 to be connected to the onboard power grid 1;
accordingly, when the cable is a four-wire plug, PLC 100 controls first switch K1 to close, causing the receptacle in shore power receptacle box 200 to function as a three-phase four-wire receptacle, while PLC 100 controls second switch S1 to open, causing fourth jack XS4 to be placed in an interlock loop, such that when a four-wire plug is normally inserted into the receptacle, PLC 100 can normally perform a preset program.
For example, in this embodiment, two ends of the interlock protection loop may be respectively connected to an I \ O port of the PLC 100, the PLC 100 may output a detection signal from the I \ O port, if another I \ O port connected to the interlock protection loop can receive the detection signal, it indicates that the plug is normally connected to the socket, the PLC 100 may normally execute the preset program, otherwise, the PLC 100 may generate an alarm prompt message to indicate an abnormal connection state between the plug and the socket.
In this embodiment, shore power system disposes PLC, shore power socket box and shore power box, wherein dispose controllable first switch in the shore power socket box, PLC can make shore power socket box adaptation three-wire system plug or four-wire system plug through the break-make of control first switch, shore power system's commonality has been improved, and simultaneously, shore power socket box still disposes the interlocking protection return circuit, dispose the second switch in the interlocking protection return circuit, can make the interlocking protection return circuit be applicable to the detection of three-wire system plug or four-wire system plug and socket connection state through the break-make of control second switch, when plug and socket normal connection, PLC carries out predetermined procedure again, can improve the holistic reliability of shore power system.
As an implementation, in this embodiment, the shore power socket box 200 may be configured on the ship, and the shore power socket box 200 is used for accessing a shore power cable, in which case the control of the first switch and the second switch may be implemented by an onboard controller, and when the plug and the socket are abnormally connected, the onboard controller prevents the shore power from accessing the onboard power grid.
Fig. 4 is a block diagram of another shore power system configuration in the embodiment, and referring to fig. 4, a voltage detection unit 301, a frequency detection unit 302, and a phase sequence detection unit 303 are configured in the shore power box.
The voltage detection unit 301, the frequency detection unit 302, and the phase sequence detection unit 303 are connected to the PLC 100, respectively. The voltage detection unit 301, the frequency detection unit 302 and the phase sequence detection unit 303 are respectively used for detecting the voltage, the frequency and the phase sequence of the ship-borne motor and the shore power motor M1.
Referring to fig. 4, a voltage regulation unit 400 is further provided in the shore power box, the voltage regulation unit 400 and the PLC
100 are connected and a voltage regulation unit 400 is used to regulate the output voltage of the shore power motor M1.
A first control switch K2 and a second control switch K3 are arranged in the shore power box, the first control switch K2 and the second control switch K3 are connected with the PLC 100, and the PLC 100 controls the on-off of the first control switch K2 to enable the shipborne power grid 1 to be connected into or disconnected from the voltage detection unit 301, the frequency detection unit 302 and the phase sequence detection unit 303; the PLC 100 connects or disconnects the shore power grid 1 to or from the voltage detection unit 301, the frequency detection unit 302 and the phase sequence detection unit 303 by controlling the on/off of the second control switch K3.
Illustratively, in the embodiment, the shipborne motor is used for connecting with the shipborne power grid 1, and the shipborne motor is used for supplying power to a shipborne system when a ship leaves a port.
For example, in this embodiment, the PLC 100 may manually control the on/off of the first control switch K2 and the second control switch K3, or the PLC 100 may be configured to automatically control the on/off of the first control switch K2 and the second control switch K3.
In this embodiment, the operation process of the shore power system may be as follows:
controlling the first control switch K2 to be closed, and the second control switch K3 to be opened, wherein the PLC 100 detects the voltage, the frequency and the phase sequence of the ship-borne motor through a voltage detection unit 301, a frequency detection unit 302 and a phase sequence detection unit 303 respectively;
the PLC 100 records the voltage, frequency and phase sequence of the shipborne motor;
the PLC 100 controls a shore power motor M1 to start to work;
the first control switch K2 is controlled to be switched off, the second control switch K3 is controlled to be switched on, and the PLC 100 detects the voltage, the frequency and the phase sequence of the shore power motor M1 through a voltage detection unit 301, a frequency detection unit 302 and a phase sequence detection unit 303 respectively;
the PLC 100 records the voltage, frequency and phase sequence of the shore power motor M1;
the PLC 100 compares the voltage, the frequency and the phase sequence of the ship-borne motor and the shore power motor M1, and if the parameters of the ship-borne motor and the shore power motor M1 are different, the PLC 100 adjusts the voltage, the frequency and the phase sequence of the shore power motor M1 according to the voltage, the frequency and the phase sequence of the ship-borne motor;
The PLC 100 judges that the voltages, the frequencies and the phase sequences of the shipborne motor and the shore power motor M1 are the same, controls the first control switch K2 to be closed, controls the second control switch K3 to be closed, and connects the shore power motor M1 to the shipborne power grid 1;
the PLC 100 adjusts the output power of the shore power motor M1 to complete load transfer, and when the set adjustment is reached, the shipborne motor is turned off to disconnect the shipborne motor from the shipborne power grid 1.
Referring to fig. 4, as an implementation, a phase detection unit 304 is further configured in the shore power box, the phase detection unit 304 is connected with the PLC 100, and the phase detection unit 304 is used for detecting the phases of the output voltages of the ship-borne motor and the shore power motor M1.
For example, the PLC 100 may detect the phases of the output voltages of the ship-borne motor and the shore power motor M1 through the phase detection unit 304, when the voltages, the frequencies, and the phase sequences of the ship-borne motor and the shore power motor M1 are the same, and the phases of the ship-borne motor and the shore power motor M1 are the same, the PLC 100 accesses the shore power motor M1 to the ship-borne power grid 1, and by additionally adding the judgment on the motor phases, the shore power motor M1 is accessed to the ship-borne power grid 1 when the phases are the same, so that the impact when the shore power motor M1 is connected to the grid can be reduced.
Fig. 5 is a block diagram of another shore power system in the embodiment, and referring to fig. 5, as an implementable embodiment, a first control switch K2, a second control switch K3, and a third control switch K4 are configured in the shore power box, the first control switch K2, the second control switch K3, and the third control switch K4 are connected to the PLC 100, and the shore power box is connected to the shore power motor M1 through the third control switch K4.
The voltage detection unit comprises a first voltage detection module 3011 and a second voltage detection module 3012; the frequency detection unit comprises a first frequency detection module 3021 and a second frequency detection module 3022; the phase sequence detection unit comprises a first phase sequence detection module 3031 and a second phase sequence detection module 3032.
The PLC 100 connects or disconnects the shipborne power grid 1 to or from the first voltage detection module 3011, the first frequency detection module 3021, and the first phase sequence detection module 3031 by controlling the on/off of the first control switch K2.
The PLC 100 connects or disconnects the shore power grid 1 to or from the second voltage detection module 3012, the second frequency detection module 3022, and the second phase sequence detection module 3032 by controlling the on/off of the second control switch K3.
The PLC 100 merges or withdraws the shore power motor M1 from the onboard power grid 1 by controlling the third control switch K4.
For example, in this embodiment, the PLC 100 may manually control the on/off of the first control switch K2, the second control switch K3, and the third control switch K4, or the PLC 100 may be configured to automatically control the on/off of the first control switch K2, the second control switch K3, and the third control switch K4.
In this embodiment, the operation process of the shore power system may be as follows:
the third control switch K4 is controlled to be opened, and the first control switch K2 and the second control switch K3 are controlled to be closed simultaneously;
The PLC 100 simultaneously acquires the voltage, frequency and phase sequence of the shipborne motor and the shore power motor M1;
the PLC 100 compares the voltage, the frequency and the phase sequence of the ship-borne motor and the shore power motor M1, and if the parameters of the ship-borne motor and the shore power motor M1 are different, the PLC 100 adjusts the voltage, the frequency and the phase sequence of the shore power motor M1 according to the voltage, the frequency and the phase sequence of the ship-borne motor;
the PLC 100 judges that the voltages, the frequencies and the phase sequences of the shipborne motor and the shore power motor M1 are all the same, controls the third control switch K4 to be closed, simultaneously disconnects the first control switch K2 and the second control switch K3, and connects the shore power motor M1 to the shipborne power grid 1;
the PLC 100 adjusts the output power of the shore power motor M1 to complete load transfer, and when the set adjustment is reached, the shipborne motor is turned off to disconnect the shipborne motor from the shipborne power grid 1.
Exemplarily, in the present solution, on the basis of the scheme shown in fig. 4, a third control switch K4 is additionally provided, so that the PLC 100 can simultaneously acquire the voltage, the frequency, and the phase sequence of the shipborne motor M1, and when the parameters of the shipborne motor M3526 are the same as those of the shore power motor M1, the shore power motor M1 can be immediately incorporated into the shipborne power grid 1 through the third control switch K4, thereby improving the accuracy of the grid connection time of the shore power motor M1.
Fig. 6 is a block diagram of another shore power system in the embodiment, referring to fig. 6, as an implementable embodiment, a first control switch K2, a second control switch K3, and a third control switch K4 are configured in the shore power box, the first control switch K2, the second control switch K3, and the third control switch K4 are connected to the PLC 100, and the shore power box is connected to the shore power motor M1 through the third control switch K4.
The shore power system further includes a voltage detection unit 301, a frequency detection unit 302, a phase sequence detection unit 303, a phase detection unit 304, a power detection unit 305, a rotational speed detection unit 306, and a current detection unit 307.
The PLC 100 accesses or quits the shipborne power grid 1 into or out of the voltage detection unit 301, the frequency detection unit 302, the phase sequence detection unit 303 and the phase detection unit 304 by controlling the on-off of the first control switch K2; the PLC 100 switches the shore power grid 1 into or out of the voltage detection unit 301, the frequency detection unit 302, the phase sequence detection unit 303, the phase detection unit 304, the power detection unit 305, the rotation speed detection unit 306, and the current detection unit 307 by controlling the on/off of the second control switch K3.
The dot voltage detection unit 301, the frequency detection unit 302, the phase sequence detection unit 303, and the phase detection unit 304 are used to detect the voltage, the frequency, the phase sequence, and the phase of the ship-mounted motor and the shore power motor M1, respectively.
The power detection unit 305 is used for detecting the output power of the shore power motor M1, the rotating speed detection unit 306 is used for detecting the rotating speed of the shore power motor M1, and the current detection unit 307 is used for detecting the output current of the shore power motor M1.
For example, on the basis of the scheme shown in fig. 4, the scheme can accurately detect the output power of the shore power motor M1 by additionally arranging the power detection unit 305, so that the process of load transfer is accurately detected, and the network withdrawal of the shipborne motor is completed in time. The working state of the shore power motor M1 can be detected by additionally arranging the rotating speed detection unit 306 and the current detection unit 307, so that the shore power motor M1 is always in a rated working state in the grid connection process, and the grid connection of the shore power motor M1 is well completed.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A shore power system is characterized by comprising a PLC, a shore power socket box and a shore power box;
the shore power socket box is provided with a three-phase four-hole socket, a first jack, a second jack and a third jack of the three-phase four-hole socket are used for being connected with a three-phase line, and a fourth jack is used for being connected with a ground wire;
the three-phase four-hole socket is provided with a first switch which is connected in series in a line connected with the fourth jack;
the three-phase four-hole socket is also provided with an interlocking protection loop, the interlocking protection loop comprises a second switch, and the second switch is used for short-circuiting the fourth jack;
the PLC is connected with the shore power socket box and the shore power box and is used for controlling the connection and disconnection of the first switch and the second switch and controlling the connection and disconnection of shore power through the shore power box.
2. The shore power system of claim 1, wherein a voltage detection unit, a frequency detection unit and a phase sequence detection unit are configured in said shore power box;
the voltage detection unit, the frequency detection unit and the phase sequence detection unit are respectively connected with the PLC and are respectively used for detecting the voltage, the frequency and the phase sequence of the shipborne motor and the shore power motor.
3. The shore power system of claim 2, wherein a voltage regulation unit is further provided in said shore power box;
the voltage regulating unit is connected with the PLC and used for regulating the output voltage of the shore power motor.
4. The shore power system of claim 2, wherein said shore power box is configured with a first control switch, a second control switch;
the first control switch and the second control switch are connected with the PLC, and the PLC controls the on-off of the first control switch to enable the shipborne power grid to be connected to or disconnected from the voltage detection unit, the frequency detection unit and the phase sequence detection unit; and the PLC controls the on-off of the second control switch to enable the shore power grid to be connected into or disconnected from the voltage detection unit, the frequency detection unit and the phase sequence detection unit.
5. The shore power system of claim 4, further comprising a third control switch, said third control switch connected to said PLC;
the PLC controls the third control switch to enable the shore power motor to be merged into or quit the shipborne power grid.
6. The shore power system of claim 5, wherein said voltage detection unit comprises a first voltage detection module, a second voltage detection module; the frequency detection unit comprises a first frequency detection module and a second frequency detection module; the phase sequence detection unit comprises a first phase sequence detection module and a second phase sequence detection module;
The PLC controls the on-off of the first control switch to enable the shipborne power grid to be connected into or disconnected from the first voltage detection module, the first frequency detection module and the first phase sequence detection module;
and the PLC controls the on-off of the second control switch to enable the shore power grid to be connected into or disconnected from the second voltage detection module, the second frequency detection module and the second phase sequence detection module.
7. The shore power system of claim 2, wherein a phase detection unit is further provided in said shore power box;
the phase detection unit is connected with the PLC and used for detecting the phases of the output voltages of the shipborne motor and the shore power motor.
8. The shore power system of claim 5, wherein a power detection unit is further configured in said shore power box;
the power detection unit is connected with the PLC and used for detecting the output power of the shore power motor.
9. The shore power system of claim 5, wherein a rotational speed detection unit is further provided in said shore power box;
the rotation speed detection unit is connected with the PLC and used for detecting the rotation speed of the shore power motor.
10. The shore power system of claim 5, wherein a current detection unit is further provided in said shore power box;
the current detection unit is connected with the PLC and used for detecting the output current of the shore power motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121163100.8U CN215580381U (en) | 2021-05-27 | 2021-05-27 | Shore power system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121163100.8U CN215580381U (en) | 2021-05-27 | 2021-05-27 | Shore power system |
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| CN215580381U true CN215580381U (en) | 2022-01-18 |
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| CN202121163100.8U Active CN215580381U (en) | 2021-05-27 | 2021-05-27 | Shore power system |
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- 2021-05-27 CN CN202121163100.8U patent/CN215580381U/en active Active
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