Unit control device and method of ship electric power system and ship electric power system

Abstract

The invention discloses a unit control device and method of a ship power system and the ship power system, and relates to the field of ship power systems. The device comprises a relay output unit, a communication processing unit, an alternating current analog quantity input unit and a log recording unit, the input end of a switching value input unit is used for inputting a switching value control signal, and the output end of the switching value input unit is connected with a main processing unit; the input end of the relay output unit is connected with the main processing unit, and the output end of the relay output unit is used for being connected with a relay group of a first unit; the communication processing unit is in communication connection with the main processing unit and other unit control devices; the output end of the alternating-current analog quantity input unit is connected with the main processing unit; and the log recording unit is connected with the main processing unit and is used for storing log events. The first unit can be controlled without interaction with the PMS, so that the control requirement of the generator set can be met in a special scene.

Description

Technical Field

[0001] The present application relates to the technical field of ship power systems, and in particular to a unit control device and method for a ship power system and a ship power system. Background Art

[0002] The ship's power system is an independent power grid. Conventional ships generally only have one power station, and the capacity of the power station is the capacity of the power grid. The ship's power station is usually equipped with 2 to 4 generator sets of the same capacity and model. The speed and voltage changes of the generator will directly affect the frequency and voltage of the power grid. The input and removal of loads will also affect the stability of the power grid frequency and voltage. In particular, sudden addition and removal of loads will cause short-term large fluctuations in the power grid, which will threaten the safe operation of the ship to a certain extent. Therefore, a safe and reliable unit control device should be set to ensure that the ship's power system can work stably for a long time.

[0003] At present, the unit control devices in the ship power system mostly adopt the centralized control mode of the ship power plant management system (Power Management System, PMS). In this mode, the unit control device works in a semi-automatic state. The unit control device receives the corresponding control instructions from the PMS and executes multiple functions such as the start and stop of the generator set, grid connection and disconnection, load balancing, etc. At the same time, the PMS will centrally manage the historical data of the unit control device.

[0004] However, in some special scenarios, such as small ships, it is usually not convenient to deploy a large and complex PMS due to limited cabin space. Even if a PMS is deployed, once a PMS fails and historical data is lost, the historical data of the unit control device cannot be retrieved, which will still affect the control of the generator set. Summary of the invention

[0005] The embodiments of the present application provide a unit control device, method and ship power system of a ship power system to improve the dependence of the unit control device on the ship power station management system and meet the control requirements of the generator set in special scenarios.

[0006] In a first aspect, a unit control device of a ship power system is provided, comprising:

[0007] Main processing unit;

[0008] A switch quantity input unit, wherein the input end of the switch quantity input unit is used to input a switch quantity control signal, and the output end of the switch quantity input unit is connected to the main processing unit;

[0009] A relay output unit, wherein the input end of the relay output unit is connected to the main processing unit, and the output end of the relay output unit is used to be connected to the relay group of the first unit;

[0010] A communication processing unit, one end of which is connected to the main processing unit, and the other end of which is used for communication connection with other unit control devices;

[0011] An AC analog quantity input unit, wherein the output end of the AC analog quantity input unit is connected to the main processing unit, and the input end of the AC analog quantity input unit is used to input an AC signal;

[0012] A log recording unit, wherein the log recording unit is connected to the main processing unit and is used to store log events.

[0013] In combination with the first aspect, the unit control device further includes:

[0014] A time synchronization processing unit, wherein the output end of the time synchronization processing unit is connected to the main processing unit, and the input end of the time synchronization processing unit is used to input an Ethernet time synchronization signal, and the Ethernet time synchronization signal is used to provide a time reference.

[0015] In combination with the first aspect, the unit control device further includes:

[0016] A power management unit is used to supply power to the unit control device.

[0017] In combination with the first aspect, the unit control device includes:

[0018] A first circuit board, wherein the first circuit board includes the AC analog quantity input unit;

[0019] A second circuit board, the second circuit board is located on one side of the first circuit board and is plugged into the first circuit board, the second circuit board includes the main processing unit, the switch input unit, the relay output unit, the communication processing unit, the log recording unit and the power management unit;

[0020] The third circuit board is located on a side of the second circuit board away from the first circuit board and is plugged into the second circuit board. The third circuit board includes the timing processing unit.

[0021] In combination with the first aspect, the unit control device further includes:

[0022] A shell, wherein the shell is used to accommodate the main processing unit, the switch input unit, the relay output unit, the communication processing unit, the AC analog input unit and the log recording unit, and the shell includes a heat sink, a wiring terminal and a status indicator light. The heat sink is used for heat dissipation, the wiring terminal is used for providing a channel for connecting the unit control device with external equipment, and the status indicator light is used for indicating the status of the unit control device.

[0023] In combination with the first aspect, the AC signal includes an AC voltage signal and an AC current signal; the unit control device further includes a collection unit, and the collection unit includes:

[0024] A voltage transformer, the output end of which is connected to the input end of the AC analog quantity input unit, and the input end of the voltage transformer is used to collect an AC voltage signal;

[0025] A current transformer, wherein the output end of the current transformer is connected to the input end of the AC analog quantity input unit, and the input end of the current transformer is used to collect AC current signals.

[0026] In a second aspect, a unit control method of a ship power system is provided, which is applied to a unit control device of a ship power system as described in any one of the first aspects, wherein the unit control device is used to control a first unit; the method comprises:

[0027] When the unit control device operates in the first operation mode, in response to the acquired first switch control signal, controlling the first unit to start;

[0028] In response to the first unit being successfully started, controlling the first unit to close the circuit breaker;

[0029] In response to the first unit being successfully closed, entering a stand-alone mode;

[0030] In the single machine mode, the actual power parameters of the first unit are adjusted based on the target power parameters.

[0031] In combination with the second aspect, the unit control device is further connected to a target control device, and the target control device is a unit control device that controls the second unit; the method further includes:

[0032] In response to the information sent by the target control device indicating that the second unit is successfully closed, switching from the single-machine mode to the multi-machine mode, and controlling the target control device to switch to the multi-machine mode;

[0033] Acquiring actual power parameters of the second unit sent by the target control device;

[0034] Based on the actual power parameter of the first unit and the actual power parameter of the second unit, the target power parameter is allocated according to a preset ratio to obtain a first target parameter of the first unit and a second target parameter of the second unit;

[0035] sending the second target parameter to the target control device so that the target control device adjusts the actual power parameter of the second unit based on the second target parameter;

[0036] The actual power parameter of the first unit is adjusted based on the first target parameter.

[0037] In combination with the second aspect, the method further includes:

[0038] In response to the information sent by the target control device instructing the second unit to shut down, the multi-machine mode is switched to the single-machine mode.

[0039] In combination with the second aspect, the unit control device is also connected to a ship power station management system; the method further includes:

[0040] When the unit control device is operating in the second operation mode, in response to a start instruction sent by the ship power station management system, control the first unit to start;

[0041] In response to a closing instruction sent by the ship power station management system, controlling the first generator to close;

[0042] In response to the single-machine operation instruction sent by the ship power station management system, the single-machine mode is entered.

[0043] In combination with the second aspect, the method further includes:

[0044] In response to the multi-machine operation instruction sent by the ship power station management system, sending the actual power parameters of the first unit to the ship power station management system;

[0045] Acquire a first target parameter sent by the ship power station management system;

[0046] The actual power parameter of the first unit is adjusted based on the first target parameter.

[0047] In a third aspect, a ship power system is provided, comprising:

[0048] Unit 1;

[0049] A unit control device, wherein the unit control device is connected to the first unit, and the unit control device is configured to control the first unit using the unit control method as described in any one of the second aspects.

[0050] One of the above technical solutions has the following advantages or beneficial effects:

[0051] The present application discloses a unit control device for a ship power system, comprising: a main processing unit, a switch input unit, a relay output unit, a communication processing unit, an AC analog input unit and a log recording unit, wherein the input end of the switch input unit is used to input a switch control signal, and the output end of the switch input unit is connected to the main processing unit; the input end of the relay output unit is connected to the main processing unit, and the output end of the relay output unit is used to connect to the relay group of the first unit; one end of the communication processing unit is connected to the main processing unit, and the other end of the communication processing unit is used to communicate and connect with other unit control devices; the output end of the AC analog input unit is connected to the main processing unit, and the input end of the AC analog input unit is used to input an AC signal; the log recording unit is connected to the main processing unit, and the log recording unit is used to store log events. The unit control device provided by the present application can automatically realize the control of the connected first unit according to demand, and the log recording unit can record all log events, which is convenient for realizing unit data backup and ensuring log storage security. The unit control device can realize the control of the first unit without interacting with the PMS, so as to meet the control requirements of the generator set in special scenarios.

[0052] A unit control method for a ship power system of the present application can realize control of a first unit without interacting with a PMS, thereby meeting the control requirements of a generator set in special scenarios.

[0053] A ship power system of the present application does not need to set up a PMS, has a relatively simple architecture, can better adapt to special scenarios with limited space, and can better meet the development needs of miniaturization, unmanned and intelligent power monitoring systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0055] Figure 1 A schematic diagram of the structure of a ship power system provided in an embodiment of the present application;

[0056] Figure 2 This is a schematic diagram of the overall structure of a unit control device of a ship power system according to an embodiment of the present application;

[0057] Figure 3A schematic diagram of the module structure of a unit control device of a ship power system according to an embodiment of the present application;

[0058] Figure 4 for Figure 3 A schematic diagram of the structure of the main processing unit;

[0059] Figure 5 for Figure 3 The structural diagram of the switch input unit;

[0060] Figure 6 for Figure 3 The structural diagram of the relay output unit;

[0061] Figure 7 for Figure 3 A schematic diagram of the structure of the communication processing unit;

[0062] Figure 8 for Figure 3 The structural diagram of the AC analog input unit;

[0063] Fig. 9 for Figure 3 A schematic diagram of the structure of the log recording unit;

[0064] Fig.10 for Figure 3 The structural diagram of the timing processing unit in the middle;

[0065] Fig.11 A schematic diagram of an overall flow chart of a unit control method for a ship power system provided in an embodiment of the present application;

[0066] Fig.12 for Fig.11 A schematic diagram of a specific process of the method shown;

[0067] Fig.13 Another overall flow chart of a method for controlling a unit of a ship power system provided in an embodiment of the present application;

[0068] Fig.14 for Fig.13 A schematic diagram of a specific process of the method shown;

[0069] Reference numerals:

[0070] 1-unit control device; 100-main processing unit; 200-switch input unit; 300-relay output unit; 400-communication processing unit; 500-AC analog input unit; 600-log recording unit; 700-time synchronization processing unit; 800-power management unit; 900-acquisition unit; 910-voltage transformer; 920-current transformer; 10-first circuit board; 20-second circuit board; 30-third circuit board; 40-housing; 41-heat sink; 42-terminal; 43-status indicator light; 2-first unit; 3-target control device; 4-second unit; 5-ship power station management system. DETAILED DESCRIPTION

[0071] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0072] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "multiple" means two or more, and at least one means one, two or more, unless otherwise clearly and specifically defined.

[0073] See also Figure 1 , Figure 1 A schematic diagram of the structure of a ship power system provided in an embodiment of the present application. The ship power system in an embodiment of the present application includes a unit control device 1 and a first unit 2, the unit control device 1 is connected to the first unit 2, and the unit control device 1 is configured to control the first unit 2, for example, to control the first unit 2 to start, close, parallel, load distribute, load transfer, shut down, etc. The first unit 2 can be a generator set.

[0074] The ship power system may also include a target control device 3 and a second unit 4, the target control device 3 is connected to the second unit 4, and the target control device 3 is configured to control the second unit 4, for example, to control the second unit 4 to start, close, parallel, load distribute, load transfer, shut down, etc. Among them, the second unit 4 can be a generator set with the same capacity and model as the first unit 2. The target control device 3 is the unit control device of the second unit 4, and the target control device 3 is connected to the unit control device 1. It can be understood that the ship power system can also include more units and unit control devices, and the embodiment of the present application does not make specific limitations on this. The capacity and model between the units can be the same or different, and the embodiment of the present application does not make specific limitations on this.

[0075] The commonly used ship power system needs to be equipped with a ship power plant management system 5, so as to issue instructions to the unit control device 1 and the target control device 3 through the ship power plant management system 5. However, in some special scenarios, it is usually inconvenient to deploy a large and complex ship power plant management system 5, which will affect the control of the generator set.

[0076] In order to reduce the dependence of the unit control device 1 on the ship power plant management system 5, an embodiment of the present application provides a unit control device 1 of a ship power system. By designing a new modular structure, it can not only store log events by itself, but also automatically perform unit control without interacting with the ship power plant management system 5, thereby greatly improving the dependence of the unit control device 1 on the ship power plant management system 5, and can meet the control requirements of the generator set even in special scenarios, thereby solving at least part of the above-mentioned technical problems.

[0077] Please also read Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the overall structure of a unit control device of a ship power system according to an embodiment of the present application. Figure 3 The module structure diagram of a unit control device of a ship power system of an embodiment of the present application is shown in FIG. The unit control device 1 of the embodiment of the present application includes a main processing unit 100, a switch input unit 200, a relay output unit 300, a communication processing unit 400, an AC analog input unit 500 and a log recording unit 600.

[0078] See also Figure 4 , Figure 4 for Figure 3Schematic diagram of the structure of the main processing unit in FIG. In some examples, the main processing unit 100 may include a DSP (Digital Signal Processor) chip and peripheral circuits. Among them, the DSP chip is the core, and specifically CDSPF28335N can be selected. The chip can replace TI's TMS320F28335 in situ, with a main frequency of 150MHz, low power consumption, and an integrated 256K×16-bit Flash (flash memory) memory and 34K×16 SARAM (Single Access RAM) on the chip. It has a rich peripherals such as CAN (Controller Area Network), eCAP (Enhanced Capture Module), and UART (Universal Asynchronous Receiver / Transmitter). The DSP chip may have two power supply ports, one port inputs a 3.3V power supply voltage, and the other port inputs a 1.9V power supply voltage. The peripheral circuit may include a reset circuit, a clock signal, and a debugging terminal, which are connected to the DSP chip through corresponding ports respectively.

[0079] The input end of the switch quantity input unit 200 is used to input a switch quantity control signal, and the output end of the switch quantity input unit 200 is connected to the main processing unit 100. Figure 5 , Figure 5 for Figure 3 Schematic diagram of the structure of the switch input unit in FIG. In some examples, the output end of the switch input unit 200 is connected to the corresponding port on the main processing unit 100 via the I2C bus. The switch control signal is an external hard-line signal that can be sent by an external device. The switch input unit 200 may include a photoelectric isolation chip and an I / O (input and output) expansion chip. The photoelectric isolation chip is used to convert the received external passive contact signal into a TTL (Transistor-Transistor Logic) level. The TTL level is transmitted to the main processing unit 100 through the I2C bus after passing through the I / O expansion chip. Among them, the photoelectric isolation chip can be selected from ORPC-847S, and the I / O expansion chip can be selected from AW9523B.

[0080] The input end of the relay output unit 300 is connected to the main processing unit 100, and the output end of the relay output unit 300 is used to connect to the relay group of the first unit 2. Figure 6 , Figure 6 for Figure 3Schematic diagram of the structure of the relay output unit in the main processing unit 100. In some examples, the input end of the relay output unit 300 is connected to the corresponding port on the main processing unit 100 through the I2C bus. The relay output unit 300 includes a driver chip, and the model of the driver chip can be selected as PCF8574. The relay output unit 300 is used to output a relay drive signal under the control of the main processing unit 100, so as to realize the control functions of closing, opening, accelerating and decelerating, and stepping up and down of the first unit 2 by controlling the action of the relay group. Among them, the relays in the relay group can adopt HFD4 / 4.5, and the driver chip and the relay group are connected through the GPIO interface.

[0081] One end of the communication processing unit 400 is connected to the main processing unit 100, and the other end of the communication processing unit 400 is used for communication connection with other unit control devices. Figure 7 , Figure 7 for Figure 3 Schematic diagram of the structure of the communication processing unit in the embodiment. In some examples, the communication processing unit 400 can be a CAN transceiver. The main processing unit 100 can be equipped with a 2-way CAN controller, and an external 2-way CAN transceiver is selected to form a CAN communication bus, which is isolated from each other and has hardware redundancy. The communication processing unit 400 is used to communicate with the other deployed unit control modules of the same model to receive control instructions or upload monitoring status. In the case where a ship power station management system 5 is deployed, it can also be used to communicate with the ship power station management system 5. Among them, the model of the CAN transceiver can be NSiP1042-DSWTR.

[0082] The output end of the AC analog input unit 500 is connected to the main processing unit 100, and the input end of the AC analog input unit 500 is used to input an AC signal. Figure 8 , Figure 8 for Figure 3 Schematic diagram of the structure of the AC analog input unit. In some examples, the AC analog input unit 500 may include an operational amplifier chip, an analog-to-digital conversion chip, and a comparison circuit. After the AC signal is amplified and filtered by the operational amplifier chip, the analog-to-digital conversion chip converts the AC analog signal into a digital signal and transmits it to the main processing unit 100 through a parallel bus for calculation. At the same time, the AC signal is connected to the eCAP interface of the main processing unit 100 after passing through the comparison circuit. Among them, the model of the operational amplifier chip can be AIP084SA, and the model of the analog-to-digital conversion chip can be CL1606.

[0083] The log recording unit 600 is connected to the main processing unit 100 and is used to store log events. Fig. 9 , Fig. 9 for Figure 3Schematic diagram of the structure of the log recording unit. In some examples, the log recording unit 600 may include a FLASH chip and its peripheral circuits. The FLASH chip may be SM25QH64M. The FLASH chip interacts with the main processing unit 100 via an SPI (Serial Peripheral Interface) interface and can provide a 64Mb log storage space, which can realize log storage of multiple types of events. The log events may include: unit start-up and shutdown, unit switch and disconnection, load distribution status, fault alarm, etc. Combined with the time reference, the function of storing more than 1,000 logs with timestamps can be realized, and the functions of log query, export, clearing, insufficient storage space alarm, etc. can be realized through the 2-way external CAN communication interface of the unit control device 1.

[0084] Through the above scheme, the unit control device 1 can automatically control the connected first unit 2 according to demand, and the log recording unit 600 can record all log events, which is convenient for unit data backup and ensures the security of log storage. The unit control device 1 can control the first unit 2 without interacting with the ship power station management system 5, thereby meeting the control needs of the generator set in special scenarios.

[0085] In some examples, the unit control device 1 may further include a time synchronization processing unit 700. The output end of the time synchronization processing unit 700 is connected to the main processing unit 100, and the input end of the time synchronization processing unit 700 is used to input an Ethernet time synchronization signal, which is used to provide a time reference. Fig.10 , Fig.10 for Figure 3 Schematic diagram of the structure of the timing processing unit in FIG. In some examples, the timing processing unit 700 can convert the Ethernet timing signal based on the IEEE1588 protocol into a pulse signal and serial port data, and send it to the main processing unit 100. The timing processing unit 700 generates a pulse signal per second, and the pulse signal is sent to the eCAP interface of the main processing unit 100. The serial port data is the timestamp information with an accuracy of seconds. The serial port data is sent to the UART interface of the main processing unit 100. Combined with the timing of the internal timer of the main processing unit 100, the accuracy can reach milliseconds, providing a time reference for the unit control device 1. In this way, an accurate timestamp can be provided for the log event, so as to better realize the unit data backup, ensure the security of log storage, and effectively avoid the problem that the historical data of the unit control device 1 cannot be retrieved due to the centralized management of the historical data of the unit control device 1 by the ship power station management system 5, once the historical data of the ship power station management system 5 is lost or damaged, the availability and rationality of the unit control device 1 are further improved through the above design.

[0086] In some examples, the unit control device 1 may further include a power management unit 800, which is used to power the unit control device 1. Specifically, the power management unit 800 may use redundant 24VDC power supply, support wide voltage input, and the power supply range is 18V to 36V. The inlet power supply of the power management unit 800 uses a 24V to ±15V DC-DC power supply module (the model can be URA2415YMD-15WR3G), a 24V to 5V DC-DC power supply module (the model can be URB2405YMD-30WR3G), and then connects to 2 power conversion chips (the models can be JWH5125CESOP and CJ6300BM respectively), with an input of 5V and an output of 3.3VDC and 1.9VDC.

[0087] In some examples, the AC signal collected by the AC analog input unit 500 may include an AC voltage signal and an AC current signal. The unit control device 1 may also include a collection unit 900, which includes a voltage transformer 910 and a current transformer 920. The output end of the voltage transformer 910 is connected to the input end of the AC analog input unit 500, and the input end of the voltage transformer 910 is used to collect the AC voltage signal; the output end of the current transformer 920 is connected to the input end of the AC analog input unit 500, and the input end of the current transformer 920 is used to collect the AC current signal. Among them, the model of the voltage transformer 910 can be TV1013-1, and the model of the current transformer 920 can be TA1015-2.

[0088] In some examples, the unit control device 1 may include a first circuit board 10, a second circuit board 20 and a third circuit board 30. The first circuit board 10 includes an AC analog input unit 500 and may also include a collection unit 900. The second circuit board 20 is located on one side of the first circuit board 10 and is plugged with the first circuit board 10. The second circuit board 20 includes a main processing unit 100, a switch input unit 200, a relay output unit 300, a communication processing unit 400, a log recording unit 600 and a power management unit 800. The third circuit board 30 is located on the side of the second circuit board 20 away from the first circuit board 10 and is plugged with the second circuit board 20. The third circuit board 30 includes a time processing unit 700. Exemplarily, the first circuit board 10 is a high-voltage board, the second circuit board 20 is a main control board, and the third circuit board 30 is a time module. The high-voltage board, the main control board, and the time module are arranged in sequence from bottom to top in a superimposed manner, and the boards are connected in a plug-in manner, that is, the high-voltage board is plugged with the main control board, and the time module is plugged with the main control board. In this way, the internal space can be better saved and the overall occupied space of the unit control device 1 can be reduced, thereby facilitating adaptation to more compact scenarios.

[0089] In some examples, the unit control device 1 may also have a fault alarm function. Fault alarms include undervoltage alarm, overvoltage alarm, underfrequency alarm, overfrequency alarm, overcurrent alarm, overload alarm, reverse power alarm, start and shutdown failure, closing and disconnection failure, load distribution failure, etc., and disconnection and emergency shutdown can be performed according to the severity of the fault. Alarm protection parameters such as protection enable, alarm delay, and alarm limit can all be configured through the communication processing unit 400.

[0090] In some examples, the unit control device 1 may further include a housing 40. The housing 40 is used to accommodate the main processing unit 100, the switch input unit 200, the relay output unit 300, the communication processing unit 400, the AC analog input unit 500 and the log recording unit 600. The housing 40 is also used to accommodate the time synchronization processing unit 700 and the power management unit 800. That is, the first circuit board 10, the second circuit board 20 and the third circuit board 30 are all accommodated in the housing 40. The housing 40 includes a heat sink 41, a wiring terminal 42 and a status indicator 43. The heat sink 41 is used for heat dissipation, the wiring terminal 42 is used to provide a channel for connecting the unit control device 1 with external equipment, and the status indicator 43 is used to indicate the status of the unit control device.

[0091] Exemplarily, the shell 40 can be made of aluminum alloy material, the structural parts are processed by CNC precision machining and painting technology, the outer surface color can be selected as medium green gray (BG01), and matte polyurethane enamel is used, which has good anti-mildew properties; the inner surface is treated with conductive oxidation; the protection form is drip-proof; a step surface design is adopted on the contact surface between the shell and the shell cover, and an electromagnetic shielding groove is milled at the same time, and an electromagnetic shielding rubber strip is installed in the groove, and the contact surface between the shell and the shell cover and the electromagnetic shielding groove are conductively treated; the inner surface of the shell adopts a reinforcing rib design, which can not only ensure the structural strength but also reduce the weight; at the same time, the outer surface adopts a heat dissipation trough design to increase the air contact area and enhance the heat dissipation efficiency.

[0092] There are multiple wiring terminals 42. Multiple wiring terminals 42 can provide power supply interface, communication interface, Ethernet timing interface, switch input acquisition interface, relay output control interface, AC voltage acquisition interface, AC current acquisition interface. For example: the wiring terminal 42 can provide 2 24VDC power supply interfaces, and the power supply interfaces are respectively connected to the power management unit 800 and the external power supply; provide 2 independent CAN2.0 communication interfaces, and the communication interfaces are respectively connected to the other end of the communication processing unit 400 and the external CAN transceiver; provide 19 passive switch input acquisition interfaces, and these switch input acquisition interfaces are respectively connected to the input end of the switch input unit 200 and the external device; provide 11 relay output control interfaces, and each relay output interface is a passive contact, and these relay output control interfaces are respectively connected to the relay output The output end of the unit 300 is connected to the relay group of the first unit 2; 4 AC voltage (0-690V) acquisition interfaces and 3 AC current (0-5A) acquisition interfaces are provided. The AC voltage acquisition interfaces are respectively connected to the voltage transformer 910 and the first unit 2, and are used to realize the acquisition function of the three-phase AC voltage and frequency on the generator side and the voltage and frequency on the busbar side; the AC current acquisition interfaces are respectively connected to the current transformer 920 and the first unit 2, and are used to realize the acquisition function of the three-phase AC current on the generator side; 1 Ethernet timing interface is provided, and the Ethernet timing interface is respectively connected to the timing processing unit 700 and the external device. In this way, the marine cable can be directly wired without the need for additional wiring terminals, which makes the overall structure more simplified and convenient to operate.

[0093] The status indicator 43 can be provided with 7 LED indicators, which are used to display the power supply status, operation status, communication status, acceleration and deceleration status, boost and buck status, and timing status. The power indicator light is green and always on when the power supply is normal, and the power indicator light is off when the power supply is abnormal; the operation status indicator light flashes green when the operation status is normal, and the operation status indicator light is red and always on when the operation status is abnormal; the communication status indicator light flashes green when CAN communication is normal, and the indicator light is green and always on when CAN communication is abnormal; the communication status indicator light flashes green when the timing status is normal, and the indicator light is off when the timing status is abnormal; the boost and buck status indicator light and the acceleration and deceleration status indicator light use two red and green two-color lights, red represents the action of the step-down and deceleration relays, and green represents the action of the step-up and acceleration relays. In this way, the normal state and the fault state can be intuitively reflected, and the state monitoring and fault detection timeliness can be realized through visual settings.

[0094] It can be understood that the unit control device 1 of the embodiment of the present application can realize log storage of multiple types of events through the log recording unit 600, and the timing processing unit 700 provides a time reference for the log, so that the log recording unit 600 can provide more than 1000 log storage spaces with timestamps, and can realize log review and export through the 2-way external CAN communication interface of the unit control device 1, so as to conveniently realize the log recording and query functions, and effectively avoid the problem that the historical data of the unit control device 1 is centrally managed by the ship power station management system 5, and once the historical data of the ship power station management system 5 is lost or damaged, the important log information of the unit control device 1 cannot be retrieved, so as to realize unit data backup and ensure the security of log storage. The above design further improves the availability and rationality of the equipment, so that the unit control device 1 can realize the control of the first unit 2 without interacting with the ship power station management system 5, so as to meet the control requirements of the generator set in special scenarios.

[0095] Accordingly, the embodiment of the present application also provides a unit control method of a ship power system, which is applied to the unit control device 1 of the ship power system of the aforementioned embodiment. The unit control device 1 can support a first operating mode, and the first operating mode can represent a fully automatic mode. It should be noted that, for the convenience of description, in the subsequent embodiments, the "unit control device 1" is represented by "1# unit control device".

[0096] Please also read Fig.11 and Fig.12 , Fig.11 A schematic diagram of an overall flow chart of a unit control method for a ship power system provided in an embodiment of the present application, Fig.12 for Fig.11 The specific flow diagram of the method shown is as follows. Wherein, unit 1# represents the first unit 2, and unit 2# represents the second unit 4. When the unit control device 1 operates in the first operation mode, the unit control method specifically includes the following steps:

[0097] Step 401: In response to the acquired first switch control signal, control the first unit 2 to start.

[0098] Step 402: In response to the first unit 2 being successfully started, the first unit is controlled to be closed.

[0099] Step 403: In response to the first unit 2 being successfully closed, entering the stand-alone mode.

[0100] Step 404: In the single machine mode, the actual power parameters of the first unit 2 are adjusted based on the target power parameters.

[0101] Specifically, after the 1# unit control device is powered on and started, when the first switch control signal indicating automatic operation is received through the switch input unit 200, the 1# unit control device drives the starting relay in the relay group of the first unit 2 to operate to control the starting of the first unit 2. After receiving the instruction indicating that the first unit 2 is successfully started through the switch input unit 200, the 1# unit control device drives the starting relay of the first unit 2 to disconnect. At this time, the 1# unit control device is configured as the host (the one that closes the switch first is the default host, and the one that closes the switch later is the default slave). When the information indicating that the first unit 2 fails to start is received through the switch input unit 200, the 1# unit control device issues a start failure alarm.

[0102] When the first unit 2 is successfully started, when the unit voltage and frequency collected by the AC analog input unit 500 meet the closing requirements, the 1# unit control device drives the closing relay of the first unit 2 to operate to control the closing of the first unit 2. After receiving information indicating that the closing is valid through the switch input unit 200, the 1# unit control device automatically enters the stand-alone mode. After receiving information indicating that the closing of the first unit 2 fails through the switch input unit 200, the 1# unit control device issues a closing failure alarm. The power parameters may include the unit voltage and frequency. In the stand-alone mode, the 1# unit control device adjusts the unit voltage and frequency to stabilize at the target value according to the actual load, wherein in the stand-alone mode, the target value is configured as the rated value, that is, the 1# unit control device will adjust the actual voltage and actual frequency of the first unit 2 based on the target voltage and target frequency. The 1# unit control device will also perform operations such as power calculation and motor protection.

[0103] Specifically, the unit voltage and frequency should be kept at the rated state in the single-machine state. Assuming that the rated voltage is configured to be 680V, ​​when the actual unit voltage collected by the 1# unit control device is less than 680V*95% (with a ±5% dead zone range, which can also be configured), the 1# unit control device generates a pulse signal to adjust the unit voltage by controlling the boost relay to increase the unit voltage to the target range (680*95%~680*105%); conversely, the 1# unit control device generates a pulse signal to adjust the unit voltage by controlling the step-down relay to reduce the unit voltage to the target range. Assuming that the rated frequency is configured to 50Hz, when the actual frequency of the unit collected by the 1# unit control device is less than 49.5Hz (with a dead zone range of ±0.5Hz, which can also be configured), the 1# unit control device generates a pulse signal by controlling the acceleration relay to adjust the unit frequency to the target range (49.5Hz~50.5Hz); conversely, the 1# unit control device generates a pulse signal by controlling the deceleration relay to adjust the unit frequency to the target range.

[0104] In some embodiments, the unit control device 1 is also connected to the target control device 3, which is a unit control device for controlling the second unit 4. The second unit 4 and the first unit 2 are generator sets of the same capacity and model. It should be noted that the target control device 3 has the same structure as the unit control device 1. For the convenience of description, the "target control device 3" is represented by "2# unit control device" in the subsequent embodiments.

[0105] In the above embodiment, the method of the embodiment of the present application further includes the following steps:

[0106] Step 405: In response to the information sent by the target control device 3 indicating that the second unit 4 is successfully closed, the single-machine mode is switched to the multi-machine mode, and the target control device 3 is controlled to switch to the multi-machine mode.

[0107] Step 406: Acquire the actual power parameters of the second unit 4 sent by the target control device 3.

[0108] Step 407 : Based on the actual power parameters of the first unit 2 and the actual power parameters of the second unit 4 , the target power parameters are allocated according to a preset ratio to obtain a first target parameter of the first unit 2 and a second target parameter of the second unit 4 .

[0109] Step 408: Send the second target parameter to the target control device 3, so that the target control device 3 adjusts the actual power parameter of the second unit 4 based on the second target parameter.

[0110] Step 409: Adjust the actual power parameter of the first unit 2 based on the first target parameter.

[0111] Specifically, the 1# unit control device maintains the stand-alone mode. After the 2# unit control device is powered on and started, when the first switch control signal indicating automatic operation is received through the switch input unit 200, the 2# unit control device drives the starting relay in the relay group of the second unit 4 to operate to control the start of the second unit 4. After receiving the instruction indicating that the second unit 4 has been successfully started through the switch input unit 200, the 2# unit control device drives the starting relay of the second unit 4 to disconnect. At this time, the 2# unit control device is configured as a slave (the one that closes first is the master by default, and the one that closes later is the slave by default). When the information indicating that the second unit 4 fails to start is received through the switch input unit 200, the 2# unit control device issues a start failure alarm.

[0112] When the second unit 4 is successfully started, the 2# unit control device adjusts the voltage and frequency of the second unit 4 by stepping up and down, accelerating and decelerating according to the busbar voltage and frequency. When the voltage, frequency, phase angle and other conditions meet the closing conditions, the 2# unit control device drives the closing relay of the second unit 4 to control the closing of the second unit 4. Among them, the busbar voltage and frequency are the target values ​​collected by the 2# unit control device, and the unit voltage and frequency are the actual values ​​of the unit collected by the 2# unit control device. The 2# unit control device generates a pulse signal to adjust the unit voltage to the target value by controlling the step-up and step-down relay (if the unit voltage is greater than the busbar voltage, the 2# unit control device generates a step-down pulse signal through the step-down relay; otherwise, a step-up pulse signal is generated). The 2# unit control device generates a pulse signal to adjust the unit frequency to the target value by controlling the acceleration and deceleration relay (if the unit frequency is greater than the busbar frequency, the 2# unit control device generates a deceleration pulse signal through the deceleration relay; otherwise, an acceleration pulse signal is generated).

[0113] After receiving information indicating that the closing is effective through the switch input unit 200, the 2# unit control device synchronizes the information of the successful closing of the second unit 4 to the 1# unit control device through the communication processing unit 400. After receiving information indicating that the closing of the second unit 4 fails through the switch input unit 200, the 2# unit control device issues a closing failure alarm.

[0114] After the 1# unit control device receives the information that the second unit 4 is successfully closed, the 1# unit control device automatically switches from the single-machine mode to the multi-machine mode, and switches the 2# unit control device to the multi-machine mode through the CAN bus. After the 2# unit control device enters the multi-machine mode, it can synchronize the actual power parameters of the second unit 4, such as the current active power, reactive power, voltage, frequency, and phase angle, to the 1# unit control device through the CAN bus. The 1# unit control device calculates and allocates the target power parameters of the first unit 2 and the second unit 4 according to the preset ratio based on the actual power parameters of the first unit 2 and the second unit 4, obtains the first target parameter of the first unit 2 and the second target parameter of the second unit 4, and returns the second target parameter to the 2# unit control device through the CAN bus; the 1# unit control device and the 2# unit control device respectively adjust the voltage, frequency, phase angle, etc. of the units through boosting and downshifting, acceleration and deceleration according to their respective target power parameters, until the active and reactive power of the first unit 2 and the second unit 4 are adjusted to the specified range, and the automatic load balancing adjustment of the 1# unit control device and the 2# unit control device is completed. In case of timeout of automatic load distribution of the 1# unit control device and the 2# unit control device, the 1# unit control device and the 2# unit control device will issue an automatic load distribution failure alarm, and then the 2# unit control device will transfer the load and de-energize.

[0115] In some embodiments, the method of the embodiment of the present application further includes the following steps:

[0116] Step 410: In response to the information sent by the target control device 3 instructing the second unit 4 to shut down, switch from the multi-machine mode to the single-machine mode.

[0117] Specifically, after the 2# unit control device receives the automatic shutdown command through the switch input unit 200, it synchronizes the information indicating the shutdown of the second unit 4 to the 1# unit control device through the CAN bus, and the 1# unit control device switches to the single-machine mode. The 2# unit control device controls the deceleration relay in a pulse manner until the power of the second unit 4 is adjusted to the decoupling limit. The 2# unit control device drives the corresponding disconnecting relay to operate. After the second unit 4 is disconnected, the 2# unit control device drives the shutdown relay to operate. After receiving the shutdown success command through the switch input unit 200, it drives the shutdown relay to disconnect.

[0118] Through the above scheme, the unit control device 1 operates in full-automatic mode, and the target value can be obtained from other unit control devices 1 through CAN communication. In this mode, the unit control device 1 can automatically execute unit start-up and shutdown, unit closing and opening, load distribution status, fault alarm, etc. without receiving corresponding control instructions from the ship power station management system 5, thereby meeting the control needs of the generator set in special scenarios.

[0119] In some embodiments, the unit control device 1 can also be connected to the ship power station management system 5 and support a second operation mode at the same time, and the second operation mode can represent a semi-automatic mode. It should be noted that, for the convenience of description, in the subsequent embodiments, the "unit control device 1" is represented by "1# unit control device" and the "target control device 3" is represented by "2# unit control device".

[0120] Please also read Fig.13 and Fig.14 , Fig.13 Another overall flow chart of a method for controlling a unit of a ship power system provided in an embodiment of the present application is provided. Fig.14 for Fig.13 The specific flow diagram of the method shown is shown in FIG. 1. Unit 1 represents the first unit 2, and unit 2 represents the second unit 4. When the unit control device 1 operates in the second operation mode, the unit control method specifically includes the following steps:

[0121] Step 601: In response to the start-up instruction sent by the ship power station management system 5, the first unit 2 is controlled to start up.

[0122] Step 602: In response to the closing instruction sent by the ship power station management system 5, the first unit 2 is controlled to close.

[0123] Step 603: In response to the stand-alone operation instruction sent by the ship power station management system 5, enter the stand-alone mode.

[0124] Specifically, after the 1# unit control device is powered on and started, when the communication processing unit 400 receives the start command sent by the ship power station management system 5, the 1# unit control device drives the start relay of the first unit 2 to operate to control the start of the first unit 2. When the first unit 2 is successfully started, the 1# unit control device drives the start relay of the first unit 2 to disconnect. When the communication processing unit 400 receives the closing command sent by the ship power station management system 5, the 1# unit control device drives the closing relay of the first unit 2 to operate to control the closing of the first unit 2. When the first unit 2 is successfully closed, the ship power station management system 5 sends a single machine operation command to the 1# unit control device, and the 1# unit control device adjusts according to the rated voltage and frequency to make the first unit 2 work stably and normally.

[0125] In some embodiments, the method of the embodiment of the present application further includes the following steps:

[0126] Step 604 : in response to the multi-machine operation instruction sent by the ship power station management system 5 , the actual power parameters of the first unit 2 are sent to the ship power station management system 5 .

[0127] Step 605: Acquire the first target parameter sent by the ship power station management system 5.

[0128] Step 606: Adjust the actual power parameter of the first unit 2 based on the first target parameter.

[0129] Specifically, the 1# unit control device maintains the single-machine mode, and after the 2# unit control device is powered on and started, when the communication processing unit 400 receives the paralleling instruction sent by the ship power station management system 5, the 2# unit control device adjusts the voltage and frequency of the second unit 4 by stepping up and down, accelerating and decelerating according to the busbar voltage and frequency. When the voltage, frequency, phase angle and other conditions meet the closing conditions, the 2# unit control device drives the closing relay of the second unit 4 to control the closing of the second unit 4. After the second unit 4 is successfully paralleled, the ship power station management system 5 sends a multi-machine operation instruction to the 1# unit control device and the 2# unit control device.

[0130] The 1# unit control device and the 2# unit control device respectively send the actual power parameters of the first unit 2 and the second unit 4, such as the actual active and reactive power, to the ship power station management system 5 through the CAN bus. After calculation, the ship power station management system 5 returns the first target parameter of the first unit 2 and the second target parameter of the second unit 4, such as the target active and reactive power, to the 1# unit control device and the 2# unit control device through the CAN bus. The 1# unit control device and the 2# unit control device adjust the unit voltage and frequency by increasing or decreasing the voltage and speeding up or down according to the target values ​​until the active and reactive power of the first unit 2 and the second unit 4 are adjusted to the specified range, and the load balancing adjustment of the 1# unit control device and the 2# unit control device is completed.

[0131] When the 2# unit control device receives the decoupling instruction of the second unit 4 sent by the ship power station management system 5, the 2# unit control device controls the deceleration relay in a pulse manner until the active power of the second unit 4 is adjusted to the decoupling limit, and the 2# unit control device drives the corresponding opening relay to operate. After the opening is successful, the ship power station management system 5 sends a single-machine operation instruction to the 1# unit control device to restore the 1# unit control device to the single-machine mode. When the 2# unit control device receives the shutdown instruction sent by the ship power station management system 5, the 2# unit control device drives the corresponding shutdown relay to operate. After the motor is successfully shut down, the shutdown relay is driven to disconnect to complete the shutdown.

[0132] Through the above solution, the unit control device 1 operates in semi-automatic mode, and the target value can be obtained by interacting with the ship power station management system 5 through CAN communication. The unit control device 1 can be compatible with both full-automatic mode and semi-automatic mode, so it has better adaptability and flexibility.

[0133] It can be understood that the unit control method of the embodiment of the present application provides a fully automatic working mode on the basis of satisfying the semi-automatic working mode. In this mode, it is not necessary to receive the corresponding control instructions of the ship power station management system 5, and the generator start and stop, closing and opening, paralleling, load distribution, load transfer and other functions can be automatically executed. Among them, in the multi-machine load distribution function, the unit control device realizes the synchronization of multi-machine active power and reactive power data through the CAN bus, and the main unit control device calculates the target active and reactive power, and realizes the reasonable distribution of loads among multiple machines in proportion through voltage and frequency regulation, simplifies the system architecture, adopts a modular form, and directly connects the ship cable without the need for additional wiring terminals, which is easy to install. The above design effectively reduces the difficulty of system wiring and meets the development needs of miniaturization, unmanned and intelligent power monitoring systems. It can flexibly adapt to various scenarios and meet the control needs of generator sets in various scenarios.

[0134] The above is a detailed introduction to a unit control device, method and ship power system of a ship power system provided in an embodiment of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application. Ordinary technical personnel in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. A unit control device for a ship power system, characterized in that: include: A main processing unit (100); A switch quantity input unit (200), wherein an input end of the switch quantity input unit (200) is used to input a switch quantity control signal, and an output end of the switch quantity input unit (200) is connected to the main processing unit (100); A relay output unit (300), wherein an input end of the relay output unit (300) is connected to the main processing unit (100), and an output end of the relay output unit (300) is used to be connected to a relay group of the first unit; A communication processing unit (400), one end of the communication processing unit (400) being connected to the main processing unit (100), and the other end of the communication processing unit (400) being used for communication connection with other unit control devices; An AC analog quantity input unit (500), the output end of the AC analog quantity input unit (500) being connected to the main processing unit (100), and the input end of the AC analog quantity input unit (500) being used to input an AC signal; A log recording unit (600), the log recording unit (600) is connected to the main processing unit (100), and the log recording unit (600) is used to store log events.

2. The unit control device of the ship power system according to claim 1, characterized in that: The unit control device also includes: A time synchronization processing unit (700), wherein the output end of the time synchronization processing unit (700) is connected to the main processing unit (100), and the input end of the time synchronization processing unit (700) is used to input an Ethernet time synchronization signal, and the Ethernet time synchronization signal is used to provide a time reference.

3. The unit control device of the ship power system according to claim 2, characterized in that: The unit control device also includes: A power management unit (800), the power management unit (800) is used to supply power to the unit control device.

4. The unit control device of the ship power system according to claim 3, characterized in that: The unit control device comprises: A first circuit board (10), the first circuit board (10) comprising the AC analog quantity input unit (500); a second circuit board (20), the second circuit board (20) being located on one side of the first circuit board (10) and pluggably connected to the first circuit board (10), the second circuit board (20) comprising the main processing unit (100), the switch input unit (200), the relay output unit (300), the communication processing unit (400), the log recording unit (600) and the power management unit (800); A third circuit board (30), the third circuit board (30) is located on a side of the second circuit board (20) away from the first circuit board (10), and is plug-connected to the second circuit board (20), and the third circuit board (30) includes the timing processing unit (700).

5. The unit control device of the ship power system according to claim 3, characterized in that: The unit control device also includes: A housing (40), the housing (40) being used to accommodate the main processing unit (100), the switch input unit (200), the relay output unit (300), the communication processing unit (400), the AC analog input unit (500) and the log recording unit (600), the housing (40) comprising a heat sink (41), a wiring terminal (42) and a status indicator light (43), the heat sink (41) being used for heat dissipation, the wiring terminal (42) being used for providing a channel for connecting the unit control device with an external device, and the status indicator light (43) being used for indicating the status of the unit control device.

6. The unit control device of the ship power system according to claim 1, characterized in that: The AC signal includes an AC voltage signal and an AC current signal; the unit control device further includes a collection unit (900), and the collection unit (900) includes: A voltage transformer (910), wherein an output end of the voltage transformer (910) is connected to an input end of the AC analog quantity input unit (500), and the input end of the voltage transformer (910) is used to collect an AC voltage signal; A current transformer (920), wherein the output end of the current transformer (920) is connected to the input end of the AC analog quantity input unit (500), and the input end of the current transformer (920) is used to collect an AC current signal.

7. A unit control method for a ship power system, characterized in that: A unit control device for a ship power system according to any one of claims 1 to 6, wherein the unit control device is used to control a first unit; and the method comprises: When the unit control device operates in the first operation mode, in response to the acquired first switch control signal, controlling the first unit to start; In response to the first unit being successfully started, controlling the first unit to close the circuit breaker; In response to the first unit being successfully closed, entering a stand-alone mode; In the single machine mode, the actual power parameters of the first unit are adjusted based on the target power parameters.

8. The unit control method of a ship power system according to claim 7, characterized in that: The unit control device is also connected to a target control device, and the target control device is a unit control device that controls the second unit; the method further includes: In response to the information sent by the target control device indicating that the second unit is successfully closed, switching from the single-machine mode to the multi-machine mode, and controlling the target control device to switch to the multi-machine mode; Acquiring actual power parameters of the second unit sent by the target control device; Based on the actual power parameter of the first unit and the actual power parameter of the second unit, the target power parameter is allocated according to a preset ratio to obtain a first target parameter of the first unit and a second target parameter of the second unit; sending the second target parameter to the target control device so that the target control device adjusts the actual power parameter of the second unit based on the second target parameter; The actual power parameter of the first unit is adjusted based on the first target parameter.

9. The unit control method of a ship power system according to claim 8, characterized in that: The method further comprises: In response to the information sent by the target control device instructing the second unit to shut down, the multi-machine mode is switched to the single-machine mode.

10. The unit control method of a ship power system according to claim 7, characterized in that: The unit control device is also connected to the ship power station management system; the method also includes: When the unit control device is operating in the second operation mode, in response to a start instruction sent by the ship power station management system, control the first unit to start; In response to a closing instruction sent by the ship power station management system, controlling the first generator to close; In response to the single-machine operation instruction sent by the ship power station management system, the single-machine mode is entered.

11. The unit control method of a ship power system according to claim 10, characterized in that: The method further comprises: In response to the multi-machine operation instruction sent by the ship power station management system, sending the actual power parameters of the first unit to the ship power station management system; Acquire a first target parameter sent by the ship power station management system; The actual power parameter of the first unit is adjusted based on the first target parameter.

12. A ship power system, characterized in that: include: Unit 1; A unit control device, the unit control device is connected to the first unit, and the unit control device is configured to control the first unit using the unit control method according to any one of claims 7 to 11.

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