A distributed series power supply method for shore power system

Abstract

The present invention provides a distributed series power supply method for a shore power system, wherein a shore power socket box is provided in each shore power pit, and each shore power socket box is provided with a main working socket and a secondary storage socket; when a ship is docked near the Nth shore power pit, the main working sockets of the shore power socket boxes in the 2nd to Nth shore power pits are connected to the main working sockets of the shore power socket boxes in the previous shore power pit; the main working socket of the shore power socket box in the N+1th shore power pit is connected to the secondary storage socket of the shore power socket box in the Nth shore power pit; the main socket of the shore power socket box in the Nth shore power pit provides power supply to the ship. The main working socket and the secondary storage socket of the previous socket box are switched and connected with the next socket box to realize the series connection of multiple socket boxes, which greatly reduces the cost requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of shore power, and in particular to a distributed series power supply method for a shore power system. Background Art

[0002] When ships are at port, they use heavy oil and diesel to generate electricity to meet electricity demand, which emits a large amount of sulfur oxides (SOX), nitrogen oxides (NOX) and particulate matter into the atmosphere, accompanied by noise from generator diesel engines, which has a serious impact on the ecosystem, surrounding environment and human health. In the context of port environmental protection, governments around the world are actively promoting the application and development of port shore power, that is, ship generators are no longer used during ship berths, but the dock shore power system is used to provide energy. Socket boxes are used at the front of the dock to match and connect with ships. A berth at the dock is usually long. Due to different ship models, one or two socket boxes cannot meet the connection requirements. If cables are laid from the shore-based power supply system to different socket boxes, a huge amount of construction is required. In addition, due to the complex environment of the dock, the laying route of the new cables may not be met. If multiple socket boxes at the front are connected in parallel, the socket boxes in the non-working state will carry high voltage electricity, causing the risk of electric shock to personnel. Summary of the invention

[0003] In order to solve the technical problems raised by the background technology, the present invention provides a distributed series power supply method for a shore power system. The shore power socket boxes are connected in series to meet the shore power usage needs of multiple berths, which greatly reduces the project cost, reduces the cable route from the shore power substation to the front of the wharf, and minimizes the on-site construction volume.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A distributed series power supply method for a shore power system, comprising the following steps:

[0006] 1) Each shore power pit is equipped with a shore power socket box, which is equipped with a main socket for working and a secondary socket for storage;

[0007] 2) The working main socket of the shore power socket box in the first shore power pit is connected to the shore-based power supply system, and the power input end of the shore power socket box in the Nth shore power pit is connected to the shore power socket box in the N-1th shore power pit, N>1;

[0008] 3) When the ship is docked near the first shore power pit, the working main socket of the shore power socket box in the first shore power pit is connected to the power supply, and the working main socket of the shore power socket box in the second shore power pit is connected to the storage auxiliary socket of the shore power socket box in the first shore power pit; the working main socket of the shore power socket box in the first shore power pit provides power supply to the ship;

[0009] 4) When the ship is docked near the Nth shore power pit, the working main sockets of the shore power socket boxes in the 2nd to Nth shore power pits are connected to the working main sockets of the shore power socket boxes in the previous shore power pit; the working main socket of the shore power socket box in the N+1th shore power pit is connected to the storage auxiliary socket of the shore power socket box in the Nth shore power pit; the working main sockets of the shore power socket box in the Nth shore power pit provide power for the ship.

[0010] Furthermore, it also includes: setting up an electrical switching box for switching the working main socket and the storage auxiliary socket of the shore power socket box with the shore power socket box of the next shore power pit.

[0011] Furthermore, the main working socket and the auxiliary storage socket are both provided with mechanical locks, which are locked by mechanical logic locks; the specific method is as follows:

[0012] 1) When the ship is docked near the first shore power pit, the transfer cable plug in the first pit is inserted into the storage auxiliary socket of the first shore power socket box, and after being locked by the mechanical logic lock, the key of the storage auxiliary socket is withdrawn; the cable plug coming from the ship is directly inserted into the working main socket of the first shore power socket box, and after being locked by the mechanical logic lock, the key of the working main socket is withdrawn, and the key of the storage auxiliary socket and the key of the working main socket are operated to the key exchange box, and the mechanical logic lock key of the ground knife in the first pit is replaced, so as to open the ground knife of the shore power system feeder cabinet and close the circuit breaker, and the high-voltage power supply circuit is turned on. The first shore power socket box provides shore power to the ship, and at this time, other shore power socket boxes are not energized;

[0013] 2) When the ship is docked near the Nth shore power pit, the transfer cable plug in the N-1th pit is inserted into the working main socket of the N-1th shore power socket box. After being locked by the mechanical logic lock, the working main socket key is withdrawn. The transfer cable plug in the Nth pit is inserted into the storage secondary socket of the Nth shore power socket box. After being locked by the mechanical logic lock, the storage secondary socket key is withdrawn. The cable plug from the ship is directly inserted into the working main socket of the Nth shore power socket box. After being locked by the mechanical logic lock, the working main socket key is withdrawn. The key is used to operate the working main socket keys of the first N-1 shore power socket boxes, the storage auxiliary socket key of the Nth shore power socket box, and the working main socket key of the Nth shore power socket box to the key exchange box, and the ground knife mechanical logic lock key in the Nth foundation pit is replaced, thereby opening the ground knife of the shore power system feeder cabinet and closing the circuit breaker, and the high-voltage power supply circuit is turned on. The Nth shore power socket box provides shore power to the ship. At this time, the shore power socket boxes in the 1st to N-1th foundation pits are energized, and the shore power socket boxes in the foundation pit behind the Nth shore foundation pit are not energized.

[0014] Furthermore, it also includes: the pilot safety circuit connecting the ship and the shore between the multiple socket boxes distributed in series is also in series. When one of the socket boxes is connected to the ship for power supply, the safety circuits between the other boxes are all connected in series through the adapter box. If an emergency occurs at any of the socket boxes, the emergency stop button can be used to trigger the shutdown of the entire equipment and cut off the high-voltage output, while all the socket boxes are not powered and are not connected to the safety circuit.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1) Multiple socket boxes are connected in series by switching the main working socket and the auxiliary storage socket of the previous socket box with the next socket box. The shore power socket boxes are connected in series to meet the shore power needs of multiple berths, which greatly reduces the project cost, reduces the cable route from the shore power substation to the front of the wharf, and minimizes the on-site construction volume;

[0017] 2) The matching mechanical interlocking design ensures the safety and reliability of multiple socket boxes in series. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The multi-socket box series connection structure of the present invention Figure 1 (Ship berthing pit #1);

[0019] Figure 2 The multi-socket box series connection structure of the present invention Figure 2 (Ship berthing pit #2);

[0020] Figure 3 The multi-socket box series connection structure of the present invention Figure 3 (Ship berthing pit #3);

[0021] Figure 4 The mechanical lock logic structure of the present invention is Figure 1 (Ship berthing pit #1);

[0022] Figure 5 The mechanical lock logic structure of the present invention is Figure 2 (Ship berthing pit #2);

[0023] Figure 6 The mechanical lock logic structure of the present invention is Figure 3 (Ship berthing pit #3);

[0024] Figure 7 This is a schematic diagram of the Pilot safety circuit connection of the present invention. Figure 1 (#1 foundation pit socket box);

[0025] Figure 8 This is a schematic diagram of the Pilot safety circuit connection of the present invention. Figure 2(#1 foundation pit transfer box);

[0026] Fig. 9 This is a schematic diagram of the Pilot safety circuit connection of the present invention. Figure 3 (#2 foundation pit socket box);

[0027] Fig.10 This is a schematic diagram of the Pilot safety circuit connection of the present invention. Figure 4 (#2 foundation pit transfer box);

[0028] Fig.11 This is a schematic diagram of the Pilot safety circuit connection of the present invention. Figure 5 (#3 pit socket box). DETAILED DESCRIPTION

[0029] The specific implementation modes provided by the present invention are described in detail below with reference to the accompanying drawings.

[0030] like Figure 1-3 As shown, a distributed series power supply method for a shore power system is provided. A plurality of shore power pits are sequentially distributed on the port, a shore power socket box is provided in each shore power pit, and each shore power socket box is provided with a working main socket A (A1-A3) and a storage auxiliary socket B (B1-B3); an electrical transfer box is also included for switching the working main socket and the storage auxiliary socket of the shore power socket box with the shore power socket box of the next shore power pit.

[0031] The working main socket A1 of the shore power socket box in the first shore power pit is connected to the shore-based power supply system, and the power input end of the shore power socket box in the Nth shore power pit is connected to the shore power socket box in the N-1th shore power pit;

[0032] See Figure 1 When the ship is docked near the first shore power pit, the working main socket A1 of the shore power socket box in the first shore power pit is connected to the power supply, and the working main socket A2 of the shore power socket box in the second shore power pit is connected to the storage auxiliary socket B1 of the shore power socket box in the first shore power pit; the main socket A1 of the shore power socket box in the first shore power pit provides power supply to the ship.

[0033] See Figure 2When the ship is docked near the second shore power pit, the working main socket A2 of the shore power socket box in the second shore power pit is connected to the working main socket A1 of the shore power socket box in the first shore power pit, and the working main socket A3 of the shore power socket box in the third shore power pit is connected to the storage auxiliary socket B2 of the shore power socket box in the second shore power pit; the main socket A2 of the shore power socket box in the second shore power pit provides power supply to the ship; and so on, when the ship is docked near the Nth shore power pit, the working main sockets of the shore power socket boxes in the 2nd to Nth shore power pits are connected to the working main sockets of the shore power socket boxes in the previous shore power pit; the working main socket of the shore power socket box in the N+1th shore power pit is connected to the storage auxiliary socket of the shore power socket box in the Nth shore power pit; the main socket of the shore power socket box in the Nth shore power pit provides power supply to the ship.

[0034] See Figure 3 , when the Nth shore power pit is the last one, the storage auxiliary socket of its shore power socket box may not be connected. When the ship is docked near the third shore power pit, the working main sockets A2 and A3 of the shore power socket boxes in the second and third shore power pits are connected to the working main sockets of the shore power socket box in the previous shore power pit; the main socket A3 of the shore power socket box in the third shore power pit provides power to the ship. When the third shore power pit is the last one, the storage auxiliary socket B3 of its shore power socket box is not connected.

[0035] The main working socket and the auxiliary storage socket are both provided with mechanical locks, which are locked by mechanical logic locks; the specific method is as follows:

[0036] 1) When the ship is docked near the first shore power pit, the transfer cable plug in the first pit is inserted into the storage auxiliary socket of the first shore power socket box, and after being locked by the mechanical logic lock, the key of the storage auxiliary socket is withdrawn; the cable plug coming from the ship is directly inserted into the working main socket of the first shore power socket box, and after being locked by the mechanical logic lock, the key of the working main socket is withdrawn, and the key of the storage auxiliary socket and the key of the working main socket are operated to the key exchange box, and the mechanical logic lock key of the ground knife in the first pit is replaced, so as to open the ground knife of the shore power system feeder cabinet and close the circuit breaker, and the high-voltage power supply circuit is turned on. The first shore power socket box provides shore power to the ship, and at this time, other shore power socket boxes are not energized;

[0037] 2) When the ship is docked near the Nth shore power pit, the transfer cable plug in the N-1th pit is inserted into the working main socket of the N-1th shore power socket box. After being locked by the mechanical logic lock, the working main socket key is withdrawn. The transfer cable plug in the Nth pit is inserted into the storage secondary socket of the Nth shore power socket box. After being locked by the mechanical logic lock, the storage secondary socket key is withdrawn. The cable plug from the ship is directly inserted into the working main socket of the Nth shore power socket box. After being locked by the mechanical logic lock, the working main socket key is withdrawn. The key is used to operate the working main socket keys of the first N-1 shore power socket boxes, the storage auxiliary socket key of the Nth shore power socket box, and the working main socket key of the Nth shore power socket box to the key exchange box, and the ground knife mechanical logic lock key in the Nth foundation pit is replaced, thereby opening the ground knife of the shore power system feeder cabinet and closing the circuit breaker, and the high-voltage power supply circuit is turned on. The Nth shore power socket box provides shore power to the ship. At this time, the shore power socket boxes in the 1st to N-1th foundation pits are energized, and the shore power socket boxes in the foundation pit behind the Nth shore foundation pit are not energized.

[0038] See Figure 4 When the ship docks at berthing point A, the transfer cable plug in the 1# foundation pit is inserted into the auxiliary socket of the 1# shore power socket box. After being locked by the mechanical logic lock, the keys K1.1 and K1.2 are withdrawn, and the cable plug from the ship is directly inserted into the main socket of the 1# shore power socket box. After being locked by the mechanical logic lock, the keys K11 and K12 are withdrawn, and the operation keys K1.1, K1.2, K11 and K12 are put into the key exchange box to replace the key K102, thereby opening the grounding knife of the shore power system feeder cabinet and closing the circuit breaker. The high-voltage power supply circuit is turned on, and the 1# shore power socket box provides shore power to the ship. At this time, the 2# and 3# shore power socket boxes are not energized.

[0039] See Figure 5 When the ship is docked at berthing point B, the transfer cable plug in the 1# foundation pit is inserted into the main socket of the 1# shore power socket box. After being locked by the mechanical logic lock, the keys K11 and K12 are withdrawn. The transfer cable plug in the #2 foundation pit is inserted into the auxiliary socket of the 2# shore power socket box. After being locked by the mechanical logic lock, the keys K2.1 and K2.2 are withdrawn. The cable plug coming from the ship is directly inserted into the main socket of the 2# shore power socket box. After being locked by the mechanical logic lock, the keys K21 and K22 are withdrawn. The keys K11, K12, K2.1, K2.2, K21 and K22 are operated to the key exchange box, and the key K102 is replaced, so that the grounding knife of the shore power system feeder cabinet is disconnected and the circuit breaker is closed. The high-voltage power supply circuit is turned on, and the 2# shore power socket box provides shore power to the ship. At this time, the 1# and 2# shore power socket boxes are energized, and the 3# shore power socket box is not energized.

[0040] See Figure 6When the ship is docked at the C berthing point, the transfer cable plug in the 1# foundation pit is inserted into the main socket of the 1# shore power socket box. After being locked by the mechanical logic lock, the keys K11 and K12 are withdrawn. The transfer cable plug in the #2 foundation pit is inserted into the main socket of the 2# shore power socket box. After being locked by the mechanical logic lock, the keys K21 and K22 are withdrawn. The cable plug coming from the ship is directly inserted into the socket of the 3# shore power socket box. After being locked by the mechanical logic lock, the keys K31 and K32 are withdrawn. The keys K11, K12, K21, K22, K31 and K32 are operated to the key exchange box, and the key K102 is replaced, so that the grounding knife of the shore power system feeder cabinet is opened and the circuit breaker is closed. The high-voltage power supply circuit is turned on, and the 3# shore power socket box provides shore power to the ship. At this time, the 1#, 2#, and 3# shore power socket boxes are all energized.

[0041] like Figure 7-11 As shown in the figure, the pilot safety circuits connecting the ship and shore between the three socket boxes in series are also connected in series. For example, when the second socket box is connected to the ship for power supply, the safety circuits between the first and second socket boxes are all connected in series through the transfer box. If an emergency occurs at any of the socket boxes, the emergency stop button can be used to trigger the shutdown of the entire equipment and cut off the high-voltage output, while the three socket boxes are not powered and are not connected to the safety circuit. In addition to the safety circuit, other auxiliary equipment, such as the box door limit switch, the liquid level alarm switch in the foundation pit, and the surveillance video, are connected to the main control room through the built-in PLC of the integrated control box to complete the remote monitoring function.

[0042] The above embodiments are implemented based on the technical solution of the present invention, and detailed implementation methods and specific operation processes are given, but the protection scope of the present invention is not limited to the above embodiments. The methods used in the above embodiments are conventional methods unless otherwise specified.

Claims

1. A distributed series power supply method for a shore power system, characterized in that: These include: 1) Each shore power pit is equipped with a shore power socket box, which is equipped with a main socket for working and a secondary socket for storage; 2) The working main socket of the shore power socket box in the first shore power pit is connected to the shore-based power supply system, and the power input end of the shore power socket box in the Nth shore power pit is connected to the shore power socket box in the N-1th shore power pit, N>1; 3) When the ship is docked near the first shore power pit, the working main socket of the shore power socket box in the first shore power pit is connected to the power supply, and the working main socket of the shore power socket box in the second shore power pit is connected to the storage auxiliary socket of the shore power socket box in the first shore power pit; the working main socket of the shore power socket box in the first shore power pit provides power supply to the ship; 4) When the ship is docked near the Nth shore power pit, the working main sockets of the shore power socket boxes in the 2nd to Nth shore power pits are connected to the working main sockets of the shore power socket boxes in the previous shore power pit; the working main socket of the shore power socket box in the N+1th shore power pit is connected to the storage auxiliary socket of the shore power socket box in the Nth shore power pit; the working main socket of the shore power socket box in the Nth shore power pit provides power supply to the ship; The main working socket and the auxiliary storage socket are both provided with mechanical locks, which are locked by mechanical logic locks; the specific method is as follows: 1) When the ship is docked near the first shore power pit, the adapter cable plug in the first pit is inserted into the storage auxiliary socket of the first shore power socket box, and after being locked by a mechanical logic lock, the key of the storage auxiliary socket is removed; The cable plug coming from the ship is directly inserted into the working main socket of the first shore power socket box. After being locked by the mechanical logic lock, the key of the working main socket is withdrawn, and the key of the storage auxiliary socket and the key of the working main socket are operated to the key exchange box to replace the mechanical logic lock key of the ground knife in the first foundation pit, thereby opening the ground knife of the shore power system feeder cabinet and closing the circuit breaker, and the high-voltage power supply circuit is turned on. The first shore power socket box provides shore power to the ship. At this time, other shore power socket boxes are not energized; 2) When the ship is docked near the Nth shore power pit, the transfer cable plug in the N-1th pit is inserted into the working main socket of the N-1th shore power socket box. After being locked by the mechanical logic lock, the working main socket key is withdrawn. The transfer cable plug in the Nth pit is inserted into the storage secondary socket of the Nth shore power socket box. After being locked by the mechanical logic lock, the storage secondary socket key is withdrawn. The cable plug from the ship is directly inserted into the working main socket of the Nth shore power socket box. After being locked by the mechanical logic lock, the working main socket key is withdrawn. The key is used to operate the working main socket keys of the first N-1 shore power socket boxes, the storage auxiliary socket key of the Nth shore power socket box, and the working main socket key of the Nth shore power socket box to the key exchange box, and the mechanical logic lock key of the ground knife in the Nth foundation pit is replaced, so as to open the ground knife of the shore power system feeder cabinet and close the circuit breaker, and the high-voltage power supply circuit is turned on. The Nth shore power socket box provides shore power to the ship. At this time, the shore power socket boxes in the 1st to N-1th foundation pits are energized, and the shore power socket boxes in the foundation pit behind the Nth shore foundation pit are not energized; It also includes: the pilot safety circuit connecting the ship and the shore between multiple socket boxes distributed in series is also connected in series. When one of the socket boxes is connected to the ship for power supply, the safety circuits between the other boxes are all connected in series through the adapter box. If an emergency occurs at any of the socket boxes, the emergency stop button can be used to trigger the shutdown of the entire equipment and cut off the high-voltage output, while all the socket boxes are not powered and are not connected to the safety circuit.

2. A distributed series power supply method for a shore power system according to claim 1, characterized in that: Also includes: An electrical switching box is provided for switching the working main socket and the storage auxiliary socket of the shore power socket box with the shore power socket box of the next shore power pit.

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