Dual-mode switching marine power control system and ship

Abstract

The utility model discloses a kind of dual-system switching's marine electric power control system and ship, wherein the multiple generator sets are connected to grid-connected bus through first grid-connected switch, load on ship is all involved grid-connected bus to obtain power supply;Multiple generator sets are divided into high-power power supply generator set and ordinary load power supply generator set;High-power power supply generator set is connected to high-power power supply bus through second grid-connected switch, high-power load on ship is connected to high-power power supply bus to obtain power supply;Ordinary load power supply generator set is connected to ordinary power supply bus through third grid-connected switch, ordinary load on ship is connected to ordinary power supply bus to obtain power supply;The output of control unit is connected to first grid-connected switch, second grid-connected switch, third grid-connected switch, to control its on-off state.The utility model switches by power supply mode, guarantees when there is high-power load power demand switching power supply circuit, improves the stability of power supply network.

Description

Technical Field

[0001] This utility model relates to the field of ship power supply control technology, and in particular to a dual-mode switching ship power control system and a ship. Background Technology

[0002] The ship's electrical system is a system that supplies power to the ship's electrical components. The ship's lighting, air conditioning and other electrical appliances are all powered by the ship's electrical system. For example, the power supply method of a ship's AC / DC grid power distribution management system, which is patented in patent application number 202110792855.2, provides power to the loads in the ship through AC / DC power supply management and supplies power to all equipment on the ship after the AC and DC power is connected to the grid.

[0003] Most of the electromechanical equipment on multipurpose shipping and operational vessels uses medium and low voltage electricity of 400V and below. Under high-power maritime operation conditions, the rated power of the equipment reaches 660V and above, and a stable power supply is required. Generally, ship power supply is a single-system multi-generator grid-connected power supply. This power supply mode can meet the stable power supply requirements of ships during navigation and transportation without causing ship shutdown. However, when the ship is operating at sea, such as when mooring equipment is in position, the equipment working during mooring, such as electric cranes and winches, will generate a large power demand, causing a sudden increase in grid power. This will affect the grid power supply and result in insufficient power supply. This defect will affect the stability of the entire ship's power supply system, and may even cause other equipment on the ship to lose power due to the instantaneous drop in grid power caused by the excessive power of the equipment working during mooring, thus affecting the stability of the ship's power supply. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a dual-mode switching marine power control system and ship. By using dual-mode power supply, the power supply mode can be switched when there is a momentary high power demand, thereby ensuring the stability of the ship's power supply.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a dual-mode switching marine power control system, including multiple generator sets and control units; The multiple generator sets are connected to the grid bus via a first grid connection switch, and the loads on the ship are all connected to the grid bus to obtain power. The generator sets are divided into generator sets that supply power to high-power loads and generator sets that supply power to ordinary loads. The generator set for high-power power supply is connected to the high-power power supply bus via the second grid connection switch, and the high-power load on the ship is connected to the high-power power supply bus to obtain power. Generator sets that supply power to ordinary loads are connected to the ordinary power supply bus via a third grid connection switch. Ordinary loads on the ship are connected to the ordinary power supply bus to obtain power. The output of the control unit is connected to the first grid-connected switch, the second grid-connected switch, and the third grid-connected switch to control their on / off states.

[0006] The control unit is connected to the human-machine interaction module, which is used to display the current power supply status to the user and input the user's power supply control commands and send them to the control unit.

[0007] The human-computer interaction module includes a central control screen, which is a touch screen.

[0008] The control unit is connected to the shipborne sensors to collect the current status data of the ship. The control unit controls the on / off of the first grid-connected switch, the second grid-connected switch, and the third grid-connected switch according to the ship's status data.

[0009] The shipborne sensor is used to collect the operating status data of high-power loads on the ship. When the operating status data of high-power loads is met, the control unit drives the first grid-connected switch to open and controls the second grid-connected switch and the third grid-connected switch to close.

[0010] The shipborne sensors include a mooring sensor, which is used to detect whether the ship is currently moored or berthed. The output of the mooring sensor is connected to the control unit.

[0011] A vessel comprising the aforementioned electrical control system.

[0012] The advantages of this utility model are: it can ensure that the dual-system multi-generator grid-connected power supply meets the stable power supply requirements of maritime transportation without paralyzing the ship, and it can also ensure that when a single generator supplies power to a single high-power device during the positioning of mooring equipment in offshore operations, there will be no accidental power outage due to insufficient power in the power grid, and it can also ensure that the failure of a single device will not affect the normal operation of other devices. Attached Figure Description

[0013] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings: Figure 1 This is a schematic diagram of the dual-mode power supply control system of this utility model.

[0014] The markings in the above diagrams are: 1. Grid-connected busbar; 2. High-power power supply busbar; 3. Ordinary power supply busbar. Detailed Implementation

[0015] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and the description of the preferred embodiments.

[0016] This embodiment provides a dual-mode switching marine power grid, which can supply power to equipment operating stably under maritime transport conditions through multiple generator sets connected to the grid, and can also supply power to a single high-power device independently by a single generator to ensure that a single point of failure does not affect the normal operation of other equipment. Through the dual-mode switching marine power grid system, different power supply needs are provided for users under different working environments, thereby improving the stability and reliability of the ship's power grid.

[0017] For operational and special-purpose vessels, large electrical equipment is often used to perform tasks at sea. For example, when a vessel equipped with a large electric crane starts operating the crane after being moored at its work position, it creates a momentary power demand surge on the vessel's electrical grid. This surge can affect the stability of the ship's electrical grid and even the lifespan of other loads on the vessel. There are many such large, high-power electrical appliances, such as winches, electric anchors, and electric dredgers. Therefore, existing power grid systems that only provide power through grid connection cannot meet the power supply stability requirements of these special-purpose vessels. This embodiment designs a dual-mode shipboard electrical grid system to achieve stable and reliable power grid operation.

[0018] like Figure 1 As shown, this embodiment provides a dual-mode switching marine power control system, which includes multiple generator sets and control units; Multiple generator sets are connected to the grid bus via the first grid connection switch, and the loads on the ship are all connected to the grid bus to obtain power. The generator sets are divided into generator sets that supply power to high-power loads and generator sets that supply power to ordinary loads. The generator set for high-power power supply is connected to the high-power power supply bus via the second grid connection switch, and the high-power load on the ship is connected to the high-power power supply bus to obtain power. Generator sets that supply power to ordinary loads are connected to the ordinary power supply bus via a third grid connection switch. Ordinary loads on the ship are connected to the ordinary power supply bus to obtain power. The output of the control unit is connected to the first grid-connected switch, the second grid-connected switch, and the third grid-connected switch to control their on / off states.

[0019] The control unit can reuse the controller in the ship's cockpit, add some controllers to the ship, or use ordinary controllers such as PLCs or microcontrollers. Its main function is to control the grid connection switch. The first, second, and third grid connection switches are all switches that connect the generator set to the bus.

[0020] The control unit is connected to the human-machine interface module, which is used to display the current power supply status to the user and to input the user's power supply control commands and send them to the control unit.

[0021] The human-machine interface module includes a central control screen, which is a touchscreen. Users can input their control commands, such as mode switching commands, and view the current power supply status information through the human-machine interface module.

[0022] Its working principle is as follows: The load on the ship is divided into high-power loads and ordinary loads other than high-power loads. High-power loads only affect the power grid when they are running at full load. When high-power loads are not running at full load, they will not have a significant impact. For example, a high-power ship crane may still have some instruments working when it is not lifting, so it needs to be powered even in normal mode. Therefore, this embodiment is equipped with a grid-connected bus. Both high-power loads and ordinary loads are connected to the grid-connected bus, and their power consumption can be obtained through the grid-connected bus. When high-power loads need to work at full power, they may cause an impact on the grid-connected bus. Therefore, in order to reduce the risk of grid fluctuations, a single power supply mode can be switched: the generator sets are divided into two categories. One category supplies power when the high-power load is working at high power. At this time, the generator set supplying the high-power load is connected to the high-power power supply bus through the grid-connected switch, and the other generator sets are connected to the ordinary bus. Ordinary loads are connected to the ordinary bus to obtain power.

[0023] In this embodiment, three power supply buses are provided. Multiple generator sets are connected to the grid-connected bus, the high-power power supply bus, and the ordinary power supply bus via their respective grid-connection switches according to pre-set requirements. Loads requiring power only need to be connected to the corresponding bus. This embodiment provides two power supply modes: Mode 1: Grid-connected power supply. In this mode, high-power loads will not operate at full load. If the high-power load only performs low-probability startups, such as a crane only starting up and moving its boom, rather than lifting cargo, there will be no high-power demand. Therefore, both high-power loads and ordinary loads obtain power through the grid bus. When the high-power load needs to operate at full load, such as when a high-power electric crane needs to lift cargo, the system switches to a single power supply mode to reduce grid impact. This is achieved by controlling the first grid-connected switch to open while simultaneously closing the second and third grid-connected switches. Since the high-power load is pre-connected to the high-power power supply bus via the second grid-connected switch and the ordinary load is connected to the ordinary power supply bus, the power consumption of the high-power load is isolated from the power supply grid of the ordinary load after switching to the single power supply mode. The power demand and impact of the high-power load during operation will not affect the power demand of the ordinary load, thus achieving isolation and making the ship's power grid more stable and reliable.

[0024] The grid connection switch primarily connects the generator module to the power supply bus. It can be implemented using a grid connection transformer and a corresponding electronic grid connection switch. The transformer converts the voltage to a suitable voltage for grid connection, while the electronic grid connection switch controls the connection between the generator set and the bus. Different power supply modes on the ship can be switched by controlling the first, second, and third grid connection switches.

[0025] In this embodiment, the switching of power supply mode can be actively controlled by the ship's operators. The operators can input switching control commands through the touch screen. The control unit receives the switching commands from the touch screen and then executes the commands to complete the control of the first, second, and third grid-connected switches, thereby achieving the switching of power supply mode and meeting the user's need for manual switching.

[0026] In a preferred embodiment of this invention, automatic power supply mode switching is supported. A shipborne sensor is installed, and a control unit is connected to the shipborne sensor to collect data on the current status of the vessel. The control unit controls the on / off switching of the first, second, and third grid-connected switches based on the vessel's status data. The shipborne sensor collects data on the operating status of high-power loads on the vessel. When the high-power load operating status data is met, the control unit drives the first grid-connected switch to open and controls the second and third grid-connected switches to close. A preferred shipborne sensor includes a mooring sensor, which detects whether the vessel is currently moored or berthed. The output of the mooring sensor is connected to the control unit.

[0027] Since large, high-power electrical appliances on ships, such as large electric cranes, are generally only activated when the ship is moored or docked, the mode can be automatically switched by collecting data on whether the ship is currently moored. The switching is achieved by controlling the on / off state of the first, second, and third grid-connected switches based on the detected mooring status. Compared to manual switching, automatic switching better meets the user's automation needs. The mooring sensor can use GPS positioning to determine if the location has changed or if the ship is in a port or dock, or it can use the operating status data of the ship's propulsion system to determine whether it is moored, thus achieving the purpose of automatic control.

[0028] This embodiment also provides a ship that includes the power control system described in the above embodiment. Because it includes the power system described above, the ship in this embodiment has all the characteristics of a dual-mode switching marine power grid. This includes ensuring that the dual-mode multi-generator grid-connected power supply meets the stable power supply requirements of maritime transportation without paralyzing the ship, and ensuring that when a single generator supplies power to a single high-power device during the positioning of mooring equipment in offshore operations, there will be no unexpected power outage due to insufficient power. Furthermore, it ensures that the failure of a single device will not affect the normal operation of other devices.

[0029] Obviously, the specific implementation of this invention is not limited to the above-described methods. Any non-substantial improvements made using the inventive concept and technical solution of this invention are within the protection scope of this invention.

Claims

1. A dual mode switched marine power control system, characterized by: Includes multiple generator sets and control units; The multiple generator sets are connected to the grid bus via a first grid connection switch, and the loads on the ship are all connected to the grid bus to obtain power. The multiple generator sets are divided into generator sets that supply power to high-power loads and generator sets that supply power to ordinary loads; The generator set for high-power power supply is connected to the high-power power supply bus via the second grid connection switch, and the high-power load on the ship is connected to the high-power power supply bus to obtain power. Generator sets that supply power to ordinary loads are connected to the ordinary power supply bus via a third grid connection switch, and ordinary loads on the ship are connected to the ordinary power supply bus to obtain power. The output of the control unit is connected to the first grid-connected switch, the second grid-connected switch, and the third grid-connected switch to control their on / off states.

2. The marine electrical control system with dual-mode switching as described in claim 1, characterized in that: The control unit is connected to the human-machine interaction module, which is used to display the current power supply status to the user and to input the user's power supply control commands and send them to the control unit.

3. A marine electrical control system with dual-mode switching as described in claim 2, characterized in that: The human-computer interaction module includes a central control screen, which is a touch screen.

4. A marine electrical control system with dual-mode switching as described in any one of claims 1-3, characterized in that: The control unit is connected to the shipborne sensors to collect the current status data of the ship. The control unit controls the on / off of the first grid-connected switch, the second grid-connected switch, and the third grid-connected switch according to the ship's status data.

5. A marine electrical control system with dual-mode switching as described in claim 4, characterized in that: The shipborne sensor is used to collect the operating status data of high-power loads on the ship. When the operating status data of high-power loads is met, the control unit drives the first grid-connected switch to open and controls the second grid-connected switch and the third grid-connected switch to close.

6. A marine electrical control system with dual-mode switching as described in claim 4, characterized in that: The shipborne sensors include a mooring sensor, which is used to detect whether the ship is currently moored or berthed. The output of the mooring sensor is connected to the control unit.

7. A ship, characterized in that: The vessel includes an electrical control system as described in any one of claims 1-6.

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