Hybrid power ship power station system and power distribution regulation and control method thereof

Abstract

The invention provides a hybrid power ship power station system and a power distribution regulation and control method thereof. The hybrid power ship power station system comprises a busbar, a plurality of dual-fuel main generators, a variable-frequency shaft generator, a battery energy storage system, a high-voltage shore power system and a power station PMS. The dual-fuel main generator is electrically connected with the busbar; the variable frequency shaft generator is electrically connected with the busbar; the battery energy storage system is electrically connected with the busbar; the high-voltage shore power system is electrically connected with the busbar; and the power station PMS is used for deploying power supply. A plurality of power supply modes cooperatively supply power, so that the technical problem that a plurality of power supply modes for hybrid power and configuration are lacked in the prior art can be solved.

Description

Technical field:

[0001] The present invention relates to the field of power distribution of hybrid power systems, and in particular to a hybrid power ship power station system and a power distribution control method thereof. Background technology:

[0002] During the voyage of the ship, the shaft generator can make full use of the power reserve margin of the propulsion main engine to supply power to the entire ship, making the propulsion main engine operate with high efficiency and low energy consumption, thus achieving energy saving. The battery system can save ship energy consumption by storing excess electrical energy and discharging it when the power load of the grid is high.

[0003] There is an urgent need for a hybrid power ship power station system and a power distribution control method thereof, which will help solve the technical problem in the prior art of lacking a method for configuring multiple power supply modes for hybrid power. Summary of the invention:

[0004] In one embodiment, the present invention provides a hybrid power ship power station system, in which multiple power supply modes are coordinated to provide power, which helps to solve the technical problem in the prior art of lacking a method for configuring multiple power supply modes for hybrid power.

[0005] The hybrid power ship power station system includes a busbar, multiple dual-fuel main generators, a variable frequency shaft generator, a battery energy storage system, a high-voltage shore power system, and a power station PMS;

[0006] The dual-fuel main generator is electrically connected to the busbar;

[0007] The variable frequency shaft-belt generator is electrically connected to the busbar;

[0008] The battery energy storage system is electrically connected to the busbar;

[0009] The high-voltage shore power system is electrically connected to the busbar;

[0010] The power station PMS is used to allocate power supply.

[0011] In one embodiment, the hybrid power ship power station system further includes an emergency generator;

[0012] The emergency generator is electrically connected to the busbar.

[0013] In one embodiment, the busbar power supply is a three-phase three-wire AC450V 60Hz IT system;

[0014] The busbars include a first group of busbars and a second group of busbars.

[0015] In one embodiment, the present invention further provides a power distribution control method for a hybrid power ship power station system, based on the hybrid power ship power station system:

[0016] The power distribution control method comprises:

[0017] When the system is in the first working mode, at least one of the dual-fuel main generators supplies power and the battery energy storage system is in a standby state;

[0018] If the dual-fuel main generator in the power supply state is abnormally tripped, ensure that the busbar has power.

[0019] In one embodiment, after the step of ensuring that the busbar has power if the dual-fuel main generator in the power supply state is abnormally tripped, the method further comprises:

[0020] If the main generator configured among the multiple dual-fuel main generators trips abnormally, the battery energy storage system supplies power to the entire ship;

[0021] The power plant PMS starts a first standby main generator, wherein the first standby main generator is the first standby main generator configured from a plurality of dual-fuel main generators;

[0022] After the engine is started and the voltage is established, the first standby main generator is automatically synchronized;

[0023] When the synchronization conditions are met, the first standby main generator automatically closes synchronously and runs in parallel with the battery energy storage system. If the start fails, the voltage is not established, and the main switch is not closed, an alarm is issued.

[0024] In one embodiment, when the synchronization condition is met, the first standby main generator is automatically closed synchronously and operates in parallel with the battery energy storage system. If the start fails, the voltage is not established, and the main switch is not closed, after the alarm step, the method further includes:

[0025] The power station PMS automatically controls the charging or discharging of the battery converter PCS according to the load of the power grid, and monitors the battery capacity SOC and various states.

[0026] In one embodiment, the power distribution control method further includes:

[0027] The variable frequency shaft belt generator is powered, and the battery energy storage system is in a state of being ready to supply power. If the variable frequency shaft belt generator is abnormally tripped, it is ensured that the busbar has power.

[0028] In one embodiment, the power distribution control method further includes:

[0029] If the busbar is in an abnormal state, the battery energy storage system is automatically controlled to supply power.

[0030] In one embodiment, the power distribution control method further includes:

[0031] If the busbar power supply is abnormal, the high-voltage shore power system will supply power.

[0032] In one embodiment, the power distribution control method further includes:

[0033] The dual-fuel main generator and the variable frequency shaft-belt generator are automatically controlled to run in parallel. Description of the drawings:

[0034] Figure 1 The figure is a schematic diagram of the architecture of a hybrid power ship power station system according to an embodiment of the present invention.

[0035] Reference numerals:

[0036] Busbar 1

[0037] The first busbar 11

[0038] The second busbar 12

[0039] Dual fuel main generator 2

[0040] Variable frequency shaft generator 3

[0041] Battery Energy Storage System4

[0042] High voltage shore power system 5

[0043] Power station PMS 6 Specific embodiment:

[0044] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0045] Various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0046] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0047] It should also be understood that, although the present application has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present application that have the features described in the claims and are therefore within the scope of protection defined thereby.

[0048] The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

[0049] Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments applied for are merely examples of the present application, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to determine the true intent based on the user's historical operations and to avoid unnecessary or redundant details that make the present application unclear. Therefore, the specific structural and functional details applied for herein are not intended to be limiting, but are merely used as the basis and representative basis for the claims to teach those skilled in the art to use the present application in a variety of ways with substantially any suitable detailed structure.

[0050] This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present application.

[0051] Figure 1 FIG. 1 is a schematic diagram of a hybrid power ship power station system architecture in one embodiment of the present invention. Figure 1 As shown, in one embodiment, the present invention provides a hybrid power ship power station system, the hybrid power ship power station system includes a busbar 1, a plurality of dual-fuel main generators 2, a variable frequency shaft generator 3, a battery energy storage system 4, a high-voltage shore power system 5, and a power station PMS 6;

[0052] The dual-fuel main generator 2 is electrically connected to the busbar 1;

[0053] The variable frequency shaft-belt generator 3 is electrically connected to the busbar 1;

[0054] The battery energy storage system 4 is electrically connected to the busbar 1;

[0055] The high voltage shore power system 5 is electrically connected to the busbar 1;

[0056] The power station PMS6 is used to dispatch power supply.

[0057] In this embodiment, a specific implementation of a hybrid power ship power station system is provided. The ship's power grid is a three-phase three-wire AC450V 60Hz IT system. The power station consists of three 1500kW dual-fuel main generators, one 1200kW variable frequency shaft generator, one 1130kWh battery energy storage system, and one 3000kVA high-voltage shore power AMP. The shaft generator, main generator, and battery are all directly connected to the ship's AC mother grid and are uniformly and collaboratively managed by the power station PMS.

[0058] In one embodiment, the hybrid power ship power station system further includes an emergency generator 7;

[0059] The emergency generator 7 is electrically connected to the busbar 1. The emergency generator 7 is composed of a 200kW emergency generator.

[0060] In one embodiment, the busbar 1 is connected to a three-phase three-wire AC450V 60Hz IT system;

[0061] The busbar 1 includes a first group of busbars 11 and a second group of busbars 12 .

[0062] In one embodiment, the present invention further provides a power distribution control method for a hybrid power ship power station system, based on the hybrid power ship power station system:

[0063] The power distribution control method comprises:

[0064] When the system is in the first working mode, at least one dual-fuel main generator 2 supplies power, and the battery energy storage system 4 is in a ready state;

[0065] If the dual-fuel main generator 2 in the power supply state trips abnormally, ensure that the busbar 1 has power.

[0066] In one embodiment, after the step of ensuring that the busbar 1 has power if the dual-fuel main generator 2 in the power supply state is abnormally tripped, the method further comprises:

[0067] If the main generator configured among the multiple dual-fuel main generators 2 trips abnormally, the battery energy storage system 4 supplies power to the entire ship;

[0068] The power station PMS6 starts the first standby main generator 2, wherein the first standby main generator is a first standby main generator 2 configured from a plurality of dual-fuel main generators 2;

[0069] After the engine is started and the voltage is established, the first standby main generator is automatically synchronized;

[0070] When the synchronization conditions are met, the first standby main generator automatically closes synchronously and runs in parallel with the battery energy storage system 4. If the start fails, the voltage is not established, and the main switch is not closed, an alarm is issued.

[0071] In one embodiment, when the synchronization condition is met, the first standby main generator is automatically closed synchronously and operates in parallel with the battery energy storage system 4. If the start fails, the voltage is not established, and the main switch is not closed, after the alarm step, the method further includes:

[0072] The power station PMS6 automatically controls the charging or discharging of the battery converter PCS according to the grid load, and monitors the battery capacity SOC and various states. The second standby (changeable) main engine automatically starts and the main switch closes to the power-off busbar

[0073] If the main switch of the main engine trips abnormally, the hot standby energy storage battery will immediately supply power to the entire ship. If the first standby main engine fails to be automatically put into operation, the second standby main engine will be automatically started. After the engine is started and the voltage is established, the second standby main engine will automatically synchronize. The others are the same as sequence number a.

[0074] In one embodiment, the power distribution control method further includes:

[0075] The variable frequency shaft belt generator 3 supplies power, and the battery energy storage system 4 is in a state of being ready to supply power. If the variable frequency shaft belt generator 3 trips abnormally, ensure that the busbar 1 has power.

[0076] a. The first standby (changeable) main engine starts automatically and the main switch closes to the de-energized busbar.

[0077] If the shaft generator main switch trips abnormally, the hot standby energy storage battery will immediately supply power to the entire ship, and the PMS will automatically start the first standby main generator.

[0078] After the engine is started and the voltage is established, the first standby main generator is automatically synchronized. When the synchronization conditions are met, the first standby main generator is automatically closed synchronously and runs in parallel with the energy storage battery. If the start fails, the voltage is not established, and the main switch is not closed, an alarm will be sounded. The energy management system PMS automatically controls the battery converter PCS to charge or discharge (peak shaving and valley filling-navigation mode) according to the grid load, and monitors the battery capacity SOC and various states.

[0079] b. The second standby (changeable) main engine starts automatically and the main switch is closed to the power-off busbar. The shaft generator main switch is abnormally tripped and the hot standby energy storage battery immediately supplies power to the entire ship. If the first standby main engine fails to be automatically put into use, the second standby main engine will be automatically started. After the engine is started and the voltage is established, the second standby main engine will be automatically synchronized. The rest is the same as sequence number a.

[0080] c. The third standby (changeable) main engine starts automatically and the main switch is closed to the de-energized busbar, and the rest is the same as above.

[0081] In one embodiment, the power distribution control method further includes:

[0082] If the busbar 1 is in an abnormal state, the battery energy storage system 4 is automatically controlled to supply power.

[0083] In one embodiment, the power distribution control method further includes:

[0084] If the power supply of busbar 1 is abnormal, the high-voltage shore power system 5 will supply power.

[0085] a. The first standby (changeable) main engine starts automatically and the main switch is closed on the power-off busbar. The high-voltage shore power AMP main switch is abnormally tripped, and the hot standby energy storage battery immediately supplies power to the entire ship. The PMS automatically starts the first standby main engine. After the engine starts and the voltage is established, the first standby main engine automatically synchronizes. When the synchronization conditions are met, the first standby main engine automatically closes synchronously and runs in parallel with the energy storage battery. If the start fails, the voltage is not established, and the main switch is not closed, an alarm will be sounded. The energy management system PMS automatically controls the charging or discharging of the battery converter PCS according to the load of the power grid (peak shaving and valley filling-navigation mode), and monitors the battery capacity SOC and various states.

[0086] b. The second standby (changeable) main engine is fully automatically started and the main switch is closed on the power-off busbar. If the main switch of the high-voltage shore power AMP is abnormally tripped, the hot standby energy storage battery will immediately supply power to the entire ship. If the first standby main engine fails to be automatically put into use, the second standby main engine will be automatically started. Others are the same as sequence number a.

[0087] c. The third standby (changeable) main engine starts automatically and the main switch is closed to the power-off busbar. Others are the same as above.

[0088] Automatic control (hot backup of energy storage batteries) for abnormal busbar conditions (high / low voltage or high / low frequency).

[0089] 3.1. Single main power supply, due to abnormal busbar (high / low voltage or high / low frequency), grid generator failure, etc. (generator mode is set to "automatic")

[0090] a. The first standby (changeable) main engine starts automatically and the main switch is closed on the power-off busbar. A single main generator supplies power. Due to abnormal busbar (high / low voltage or high / low frequency), if the busbar voltage is low or the frequency is low, non-important loads are automatically tripped, the main generator automatically transfers load and automatically opens, and the hot standby energy storage battery supplies power to the entire ship. The PMS automatically starts the first standby main generator. After the engine starts and the voltage is established, the first standby main generator automatically synchronizes. When the synchronization conditions are met, the first standby main generator automatically synchronizes and closes, and runs in parallel with the energy storage battery; if the start fails, the voltage is not established, and the main switch is not closed, an alarm is sounded. The energy management system PMS automatically controls the charging or discharging of the battery converter PCS according to the grid load (peak shaving and valley filling-navigation mode), and monitors the battery capacity SOC and various states.

[0091] b. The second standby (changeable) main engine is fully automatically started and the main switch is closed on the power-off busbar. A single main generator is used to supply power. Due to abnormal busbar (high / low voltage or high / low frequency), if the bus voltage or frequency is low, non-important loads will be automatically tripped, and the main generator will automatically transfer load and automatically open. The hot standby energy storage battery will supply power to the entire ship. If the first standby main generator fails to be automatically put into use, the second standby main generator will be automatically started. Others are the same as sequence number a.

[0092] 3.2. Single shaft generator power supply, due to abnormal busbar (high / low voltage or high / low frequency), shaft generator failure, etc. (the generator mode is set to "automatic")

[0093] a. The first standby (changeable) main engine starts automatically and the main switch is closed on the power-off busbar. If the busbar voltage is low or the frequency is low, the non-important load will be automatically tripped due to abnormal busbar (high / low voltage or high / low frequency), and the shaft generator will automatically transfer the load and automatically trip. The hot standby energy storage battery will supply power to the whole ship. The PMS will automatically start the first standby main engine. After the engine starts and the voltage is established, the first standby main engine will automatically synchronize. When the synchronization conditions are met, the first standby main engine will automatically synchronize and close, and run in parallel with the energy storage battery. If the start fails, the voltage is not established, and the main switch is not closed, an alarm will be sounded. The energy management system PMS automatically controls the charging or discharging of the battery converter PCS according to the load of the power grid (peak shaving and valley filling-navigation mode), and monitors the battery capacity SOC and various states.

[0094] b. The second standby (changeable) main engine is automatically started and the main switch is closed on the power-off busbar. A single shaft generator supplies power. Due to abnormal busbar (high / low voltage or high / low frequency), if the bus voltage or frequency is low, non-important loads are automatically tripped, and the shaft generator automatically transfers load and automatically opens. The hot standby energy storage battery supplies power to the entire ship. If the first standby main generator fails to be automatically put into use, the second standby main generator is automatically started. Others are the same as sequence number a.

[0095] c. The third standby (changeable) main engine starts automatically and the main switch is closed on the power-off busbar. Other uses, high-voltage shore power AMP power supply, due to abnormal busbar (high / low voltage or high / low frequency) (generator mode is set to "automatic")

[0096] a. The first standby (changeable) main engine starts automatically and the main switch is closed when the high-voltage shore power AMP of the power-off busbar is powered. Due to abnormal busbar (high / low voltage or high / low frequency), if the bus voltage is low or the frequency is low, non-important loads are automatically tripped, and the high-voltage shore power AMP automatically transfers loads and automatically opens. The hot standby energy storage battery supplies power to the entire ship. The PMS automatically starts the first standby main engine. After the engine starts and the voltage is established, the first standby main engine automatically synchronizes. When the synchronization conditions are met, the first standby main engine automatically synchronizes and closes, and runs in parallel with the energy storage battery; if the start fails, the voltage is not established, and the main switch is not closed, an alarm is sounded. The energy management system PMS automatically controls the charging or discharging of the battery converter PCS according to the grid load conditions, and monitors the battery capacity SOC and various states.

[0097] b. The second standby (changeable) main engine starts automatically and the main switch is closed to the high-voltage shore power AMP of the power-off busbar. Due to abnormal busbar (high / low voltage or high / low frequency), if the busbar voltage is low or the frequency is low, non-important loads will be automatically tripped, and the high-voltage shore power AMP will automatically transfer the load and automatically open the switch. The hot standby energy storage battery will supply power to the whole ship. If the first standby main engine fails to be automatically put into use, the second standby main engine will be automatically started. Others are the same as above.

[0098] c. The third standby (changeable) main engine starts automatically and the main switch is closed to the power-off busbar. Others are the same as above.

[0099] In one embodiment, the power distribution control method further includes:

[0100] The dual-fuel main generator 2 and the variable frequency shaft-belt generator 3 are automatically controlled to run in parallel.

[0101] Automatic control of main engine and shaft engine parallel operation

[0102] 4.1. The main engine and shaft engine run in parallel, with proportional load distribution.

[0103] The main engine and the shaft engine run in parallel, and the PMS distributes the load between the main engine and the shaft engine in proportion.

[0104] 4.2. The main generator and shaft generator run in parallel, and the shaft generator runs at a fixed power.

[0105] ◆Minimum allowable power of main generator (400kW, adjustable); fixed power of shaft generator (less than 95% of rated power of shaft generator, adjustable);

[0106] ◆If the “shaft generator set fixed power” is greater than the “shaft generator available power”, then the “shaft generator fixed power” is the “shaft generator available power”;

[0107] ◆ If the “axle generator fixed power setting” is less than the “axle generator available power”, then the “axle generator fixed power” is equal to the “axle generator fixed power setting”.

[0108] power"

[0109] a. If the "total grid load" is greater than the "minimum allowable power of the main generator" + "fixed power of the shaft generator", the shaft generator takes the fixed power and the main generator takes the remaining power;

[0110] b. If the "total grid load" is less than the "minimum allowable power of the main generator" + "fixed power of the shaft generator", the main generator takes the minimum allowable power and the shaft generator takes the remaining power;

[0111] Here, in order to avoid power outage of the entire ship, two functions of dual protection are as follows:

[0112] (1) The rated power (available power) of the shaft generator changes according to the speed of the host. When the shaft generator is working on the network, the PMS outputs the shaft generator load power (4-20mA) to the host / host remote control to limit the host speed reduction and load reduction. Sufficient power must be reserved for the shaft generator until the shaft generator is out of use.

[0113] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A hybrid power ship power station system, characterized in that: The hybrid power ship power station system comprises: a busbar (1); A plurality of dual-fuel main generators (2), wherein the dual-fuel main generators (2) are electrically connected to the busbar (1); a variable frequency shaft-belt generator (3), which is electrically connected to the busbar (1); a battery energy storage system (4), which is electrically connected to the busbar (1); a high-voltage shore power system (5), which is electrically connected to the busbar (1); A power station PMS (6) is used to allocate power supply.

2. The hybrid power ship power station system according to claim 1, characterized in that: The hybrid power ship power station system also includes: An emergency generator (7) is electrically connected to the busbar (1).

3. The hybrid power ship power station system according to claim 2, characterized in that: The busbar (1) is connected to a three-phase three-wire AC450V 60Hz IT system; The busbar (1) comprises: A first group of busbars (11); A second set of busbars (12).

4. A power distribution control method for a ship power station system based on hybrid power, characterized in that: A ship power station system based on a hybrid power system according to any one of claims 1 to 3; The power distribution control method comprises: When the system is in the first working mode, at least one of the dual-fuel main generators (2) supplies power and the battery energy storage system (4) is in a standby state; If the dual-fuel main generator (2) in the power supply state trips abnormally, ensure that the busbar (1) has power.

5. The power distribution control method of the hybrid power ship power station system according to claim 4 is characterized in that: After the step of ensuring that the busbar (1) has power if the dual-fuel main generator (2) in the power supply state trips abnormally, the method further comprises: If a main generator configured among the plurality of dual-fuel main generators (2) trips abnormally, the battery energy storage system (4) supplies power to the entire ship; The power station PMS (6) starts a first standby main generator (2), wherein the first standby main generator is the first standby main generator (2) configured from a plurality of dual-fuel main generators (2); After the engine is started and the voltage is established, the first standby main generator is automatically synchronized; When the synchronization conditions are met, the first standby main generator automatically closes synchronously and operates in parallel with the battery energy storage system (4). If the start fails, the voltage is not established, and the main switch is not closed, an alarm is issued.

6. The power distribution control method of the hybrid power ship power station system according to claim 5, characterized in that: When the synchronization condition is met, the first standby main generator automatically closes synchronously and operates in parallel with the battery energy storage system (4). If the start fails, the voltage is not established, and the main switch is not closed, after the alarm step, the method further includes: The power station PMS (6) automatically controls the charging or discharging of the battery converter PCS according to the load of the power grid, and monitors the battery capacity SOC and various states.

7. The power distribution control method of the hybrid power ship power station system according to claim 6 is characterized in that: The power distribution control method further includes: The variable frequency shaft belt generator (3) supplies power, and the battery energy storage system (4) is in a state of being ready to supply power. If the variable frequency shaft belt generator (3) trips abnormally, it is ensured that the busbar (1) has power.

8. The power distribution control method of the hybrid power ship power station system according to claim 7, characterized in that: The power distribution control method further includes: If the busbar (1) is in an abnormal state, the battery energy storage system (4) is automatically controlled to supply power.

9. The power distribution control method of the hybrid power ship power station system according to claim 8, characterized in that: The power distribution control method further includes: If the power supply of the busbar (1) is abnormal, the high-voltage shore power system (5) supplies power.

10. The power distribution control method of a hybrid power ship power station system according to claim 9, characterized in that: The power distribution control method further includes: The dual-fuel main generator (2) and the variable-frequency shaft-belt generator (3) are automatically controlled to operate in parallel.

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