Comprehensive interlocking protection device with ship-shore power conversion control function

Abstract

The invention relates to the field of ship power monitoring, in particular to a comprehensive interlocking protection device with a ship-shore power conversion control function, which integrates a traditional ship-shore power conversion monitoring system and an interlocking protection device and comprises a casing suite, a switching value input unit and a switching value output unit. The ship-shore power conversion monitoring system integrates the ship-shore power conversion monitoring system and the interlocking protection device and has the functions of the ship-shore power conversion monitoring system and the interlocking protection device; different standardized switching value input units and switching value output units can be selected to form different types of controllers, so that the workload of mechanical design and hardware design is greatly reduced; the shell is integrally closed, conductive adhesive tapes are adhered between contact surfaces, and the circuit board uses an aviation plug for external connection, so that electromagnetic interference can be effectively prevented; according to the invention, domestic electronic components are used, so that the cost can be effectively reduced, and the influence caused by forbidden and limited operation of imported electronic components is avoided.

Description

Technical Field

[0001] The present invention relates to the field of ship power monitoring, and in particular to a comprehensive interlocking protection device with a ship-to-shore power conversion control function. Background Art

[0002] In traditional power monitoring devices, ship-to-shore power conversion control devices and power system interlocking protection devices are usually independently equipped to complete the disconnection of the target circuit breaker during ship-to-shore power conversion and the interlocking protection between the circuit breakers, which are important components of the power system. The devices are connected through complex electrical interfaces or communication interfaces, and the technical approach to functional implementation is complex, the degree of integration is low, the reliability is not strong, and the economy is poor. The power system harmonics, waveform distortion, and power supply system transients form mutual induction and coupling on the conduction of ship power monitoring equipment. Electromagnetic interference will seriously affect the sensitivity and accuracy of the system equipment, and also affect the stability and reliability of the power monitoring system.

[0003] Therefore, it is necessary to design a comprehensive interlocking protection device that can simultaneously have the ship-to-shore power conversion function and the interlocking protection function and has the function of effectively shielding electromagnetic interference. Summary of the invention

[0004] In order to solve the technical problems of low integration, low standardization and susceptibility to electromagnetic interference in the existing ship-to-shore power conversion control devices and power system interlocking protection devices, the present invention proposes a comprehensive interlocking protection device with ship-to-shore power conversion control function. The present invention realizes the integration of the ship-to-shore power conversion control device and the power system interlocking protection device, the standardization of the switch input unit and the switch output unit, and improves the electromagnetic protection capability.

[0005] The comprehensive interlocking protection device integrates the ship-to-shore power conversion monitoring system and the interlocking protection device;

[0006] The comprehensive interlocking protection device comprises: a housing kit, a switch quantity input unit and a switch quantity output unit;

[0007] The housing kit includes: a mechanical housing, an aviation plug connection module, a power supply module, a CPU main processing module and a bus module;

[0008] The aviation plug connection module, the power supply module, the CPU main processing module, the switch input unit, and the switch output unit are all connected to the bus module using a socket strip;

[0009] The mechanical housing is made of aluminum alloy, and the components are integrally formed by six-sided splicing;

[0010] Conductive tape is attached to the contacting surfaces of each aluminum plate of the mechanical housing and the side edge of the back side of the mounting plate;

[0011] The aviation plug connection module uses aviation plugs that are compatible with power station controllers and generator set controllers of the same series of products, including power aviation plugs, CAN network aviation plugs, switch input aviation plugs and switch output aviation plugs;

[0012] The CPU main processing module is equipped with a core protection program and control logic for integrated control of ship power and shore power conversion and interlocking protection of the power system;

[0013] The switch quantity input unit realizes the collection of the status of each generator set, jumper and shore power switch;

[0014] The switch output unit realizes the conversion and interlocking output of each generator set, jumper and shore power switch;

[0015] The switch input unit collects the switch status of the generator set circuit breaker, the jumper circuit breaker, the bus tie circuit breaker and the shore power circuit breaker, and inputs it to the CPU main processing module. After the CPU main processing module processes it, it outputs it to the switch output unit to realize the conversion and interlocking output of the switch status of the generator set circuit breaker, the jumper circuit breaker, the bus tie circuit breaker and the shore power circuit breaker;

[0016] The comprehensive interlocking protection device operates independently of other equipment in the power station monitoring system.

[0017] The standardized circuit board card where the switch quantity input unit and the switch quantity output unit are located is fixed on the mounting plate, and is inserted and fixed from the front plate of the mechanical housing.

[0018] The CPU main processing module is located at the bottom of the mechanical housing, adopts a dual redundant network design, and is equipped with 4 CAN networks. Two of them are connected to the internal CAN network of the comprehensive interlocking protection device, receive the status information collected by the main processing unit, and send ship-shore power conversion and interlocking protection instructions; two of them are connected to the external CAN network of power monitoring to upload the working status of the comprehensive interlocking protection device and the interlocking protection output status.

[0019] The aviation plug connection module is located at the right end of the mechanical housing, and uses an aviation plug to access the power supply, CAN network, switch input, switch output and signals of other control products in the same series.

[0020] The power supply module is located on the right side of the front panel of the mechanical housing, and includes a power switch, a power indicator light, a "DB9 type" debugging interface and a power protection device. The power switch independently controls the comprehensive interlocking protection device.

[0021] The comprehensive interlocking protection device realizes the interlocking of the jumper circuit breaker: when the switch input unit detects that the jumper circuit breaker is closed, the switch output unit outputs an instruction to lock the last jumper circuit breaker in the power grid.

[0022] When the switch input unit detects that the circuit breaker of the emergency plug-in box at the end of the accident power distribution generator is connected, the switch output unit outputs an instruction to lock the internal short-circuit protection function of the generator.

[0023] When the ship power is converted to shore power, the switch input unit detects that when the shore power circuit breaker is connected in parallel with the ship power circuit breaker, the switch output unit outputs an instruction to disconnect the generator set circuit breaker on the grid; when the shore power is converted to ship power, the switch input unit detects that when the shore power circuit breaker is connected in parallel with the ship power circuit breaker, the switch output unit outputs an instruction to disconnect the shore power circuit breaker on the grid.

[0024] When the switch input unit detects that the power supply is switched from shore power to onboard power, the switch output unit outputs an instruction to semi-automatically connect the designated generator to the shore power in parallel and lock the circuit breakers of the remaining generators; if the switch input unit detects that the shore power circuit breaker in the grid is still disconnected within a specified time after the connection, the switch output unit outputs an instruction to cut off the circuit breaker of the generator set.

[0025] The switch input unit detects that when the power supply is switched from shore power to onboard power supply, there is more than one generator connected to the shore power grid, and the switch output unit outputs an instruction to lock the shore power circuit breaker; if the switch input unit detects that the on-grid generator circuit breaker is still disconnected within a specified time after the connection, the switch output unit outputs an instruction to cut off the shore power circuit breaker.

[0026] When the switch input unit detects that the two ends of the jumper circuit breaker are respectively powered by ship power and shore power, the switch output unit outputs an instruction to lock the jumper circuit breaker, prohibiting the ship power and shore power conversion function through the jumper circuit breaker.

[0027] The comprehensive interlocking protection device uses 100% domestically produced electronic components.

[0028] In general, the above technical solution conceived by the present invention has the following beneficial effects compared with the prior art:

[0029] The present invention integrates the ship-shore power conversion monitoring system and the interlocking protection device, and has the functions of both, thus achieving integration.

[0030] The present invention can select different standardized switch input units and switch output units to form different types of controllers, which greatly reduces the workload of mechanical design and hardware design.

[0031] The shell structure of the present invention is simple, and the main structure adopts aluminum alloy thick plate as raw material, which can effectively ensure the shell strength. The shell is sealed as a whole, and conductive tape is attached between the contact surfaces of each surface. The circuit board uses an aviation plug for external connection, which can effectively prevent electromagnetic interference.

[0032] The present invention uses domestically produced electronic components, which can effectively reduce costs and avoid the impact caused by the ban on the import of electronic components. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the present invention.

[0034] Figure 2 It is a schematic diagram of the core components of the printed circuit board of the present invention.

[0035] Figure 3 It is an exploded view of the housing of the comprehensive interlocking protection device of the present invention.

[0036] Figure 4 It is the overall structural diagram of the comprehensive interlocking protection device of the present invention.

[0037] Figure 5 These are the various directional views of the comprehensive interlocking protection device of the present invention. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0039] The present invention provides a comprehensive interlocking protection device with a ship-to-shore power conversion control function, which is mainly used in a ship power station monitoring system and integrates a ship-to-shore power conversion monitoring system and an interlocking protection device.

[0040] The comprehensive interlocking protection device comprises: a housing kit, a switch quantity input unit and a switch quantity output unit.

[0041] The housing kit includes: a mechanical housing, an aviation plug connection module, a power supply module, a CPU main processing module and a bus module.

[0042] like Figure 2 and Figure 3 As shown, the aviation plug connection module and the power supply module are located on the right side plate of the mechanical housing, and are vertically connected to the right side of the bus module through a socket strip. The switch input unit and the switch output unit are vertically connected to the front of the bus module through a socket strip, and the CPU main processing module is connected to the back between the bus modules through a socket strip.

[0043] like Figure 1As shown, the switch input unit collects the switch status of the generator set circuit breaker, the jumper circuit breaker, the bus tie circuit breaker and the shore power circuit breaker, and inputs it to the CPU main processing module. After the CPU main processing module processes it, it outputs it to the switch output unit to realize the conversion and interlocking output of the switch status of the generator set circuit breaker, the jumper circuit breaker, the bus tie circuit breaker and the shore power circuit breaker.

[0044] The mechanical housing is made of aluminum alloy material, and the components are integrally formed by six-sided splicing to generate a simple module housing that is compatible with aviation connectors to form a closed structure, which can effectively protect against electromagnetic interference.

[0045] The printed circuit boards of the switch quantity input unit and the switch quantity output unit are universal units designed according to the mechanical housing structure.

[0046] The aviation plug connection module is equipped with several aviation plugs for connecting to the power supply and inputting and outputting various signals. The use of aviation plugs can prevent electromagnetic interference more effectively than ordinary connectors.

[0047] The top, bottom, left and right side plates are milled from thicker aluminum plates and are the most important parts of the mechanical housing. The top and bottom plates are connected to the two side plates by screws to form a basic housing frame. A guide groove and a crossbeam are milled on the inner wall of the top and bottom plate housings. The guide groove facilitates the installation and plugging of the switch input unit and the switch output unit. The crossbeam is used to fix the busbar module. The remaining positions are milled thin or hollowed out to reduce the weight of the housing. Several installation positions for aviation plugs are set on the right side plate. The right side plate is used to fix the outlet board. The left and right side plates are each assembled with handles and mounting brackets with screws to facilitate the carrying and fixing of the housing. The front plate is divided into four parts, consisting of two circuit board mounting plates and two ordinary thin aluminum plates. The circuit board mounting plates have side edges on both sides of the back and buckles on the front. The mounting plates are used to fix the switch input unit and the switch output unit. Finally, a thin aluminum plate is used as the bottom plate of the housing and fixed to the top and bottom plates with screws. The entire housing forms a closed space for protecting against electromagnetic interference.

[0048] When assembling the mechanical housing, the left and right side plates of the top and bottom plates are assembled into a housing frame with countersunk screws, the aviation plug on the outlet plate is extended from the inside along the hole on the right side plate, and fixed from the outside with screws, the busbar module is installed from the bottom of the housing, the busbar module is connected to the outlet plate through a plug strip, and fixed on the crossbeam of the top and bottom plates, and the bottom plate, the top and bottom plates and the two thin aluminum plates of the front plate are respectively installed on the housing frame with screws. The switch input unit and the switch output unit are respectively installed on two mounting plates, and the switch input unit and the switch output unit are inserted into the housing along the guide groove in the top and bottom plates, connected with the busbar module through a plug strip, and the mounting plate is locked on the top and bottom plates with a buckle, and finally fastened with screws.

[0049] After the assembly, the integrated interlocking protection device is as follows: Figure 4 and Figure 5 shown.

[0050] Conductive tape is affixed to the contact surfaces of each aluminum plate of the entire shell structure, and conductive tape is also affixed to the side edge of the back of the mounting plate to fill the gap between the front plates. All surfaces of the entire shell are interconnected and the shell is sealed as a whole to prevent electromagnetic interference.

[0051] An aviation plug connection module is configured on the right side of the integrated interlocking protection device, which is consistent with the power station controller and generator set controller of the same series of products. Taking full account of the integrated optimization design principle, 11 aviation plugs are arranged, with serial number marks J1~J11. J1, J5, etc. are used to access power supply, CAN network, switch input, switch output and other signals. The rest are configured according to the general configuration of the same series of control products. The specific interface details are shown in the following table:

[0052]

[0053]

[0054]

[0055]

[0056] The integrated interlock protection device is equipped with a power supply module on the right side of the front panel, and is equipped with a power switch, a power indicator light, and a "DB9 type" debugging interface.

[0057] The CPU main processing module is the core component of the comprehensive interlocking protection device, equipped with core protection programs and control logic, and is used for the comprehensive control of ship power and shore power conversion and interlocking protection of the power system.

[0058] The CPU main processing module hardware is set up with 4 CAN networks, and adopts a dual redundant network design. Two of them are connected to the internal CAN network of the integrated interlocking protection device, receiving the status information of the core equipment such as the external circuit breaker collected by the main processing unit, and sending the ship-to-shore power conversion and interlocking protection instructions that need to be executed; two of them are connected to the external CAN network of the power monitoring, uploading the working status of the integrated interlocking protection device (for power system status monitoring) and the interlocking protection output.

[0059] The bus module of the integrated interlocking protection device is the hub connecting the aviation plug connection module with the CPU main processing module, the switch input unit and the switch output unit, and is used for the access of external signals and the transfer of internal signals.

[0060] The switch quantity input unit mainly realizes the collection of the status of each generator set, jumper and shore power switch. It has power supply, digital input (DI), communication and other interfaces. The core MCU adopts DSP (JDSPF28335 of China Electronics 58 Institute) and supports 32-channel passive switch quantity collection and CAN standard interface information exchange.

[0061] The switch output unit mainly realizes the conversion and interlocking output of each generator set, jumper and shore power switch. It has power supply, digital output (DO), communication and other interfaces. The core MCU adopts DSP (JDSPF28335 of China Electronics 58 Institute) and supports 32-way passive switch output and CAN standard interface information exchange.

[0062] The integrated interlocking protection device operates independently of other equipment in the power station monitoring system and can operate independently under any control mode.

[0063] The interlock protection device collects the switch status of the generator set circuit breaker, jumper circuit breaker, busbar circuit breaker and shore power circuit breaker, and implements interlock protection through internal programs. The main functions include:

[0064] Interlock multiple jumper circuit breakers and lock the last circuit breaker to ensure that the system power supply network does not form a ring power supply;

[0065] The internal short-circuit protection function of the generator is interlocked with the circuit breaker of the emergency plug-in box at the accident distribution generator end. When the circuit breaker is turned on, the protection function is locked;

[0066] When the ship power is transferred to the shore power, after the shore power circuit breaker is connected in parallel with the ship power circuit breaker, the generator set circuit breaker on the grid is disconnected; when the shore power is transferred to the ship power, after the ship power circuit breaker is connected in parallel with the shore power circuit breaker, the shore power circuit breaker on the grid is disconnected;

[0067] When switching from shore power to ship power, only the designated generator is allowed to semi-automatically connect to the shore power, and the circuit breakers of the remaining generators are locked. If the shore power circuit breaker is still not disconnected within 0.5s to 5s after the connection, a command to disconnect the generator set circuit breaker is issued to protect the power grid;

[0068] When switching from ship power supply to shore power supply, if there is more than one generator connected to the shore power grid, the shore power circuit breaker will be locked. If the generator circuit breaker on the grid is still not disconnected within 0.5s to 5s after the connection, a command to disconnect the shore power circuit breaker will be issued to protect the power grid;

[0069] When the two ends of the jumper circuit breaker are powered by ship power and shore power respectively, the jumper circuit breaker will be locked. The paralleling points for ship-to-shore power conversion are only set to the generator circuit breakers and shore power short circuit breaker, and the jumper circuit breaker does not have the function of ship-to-shore power conversion.

[0070] It should be noted that the above-described specific implementations can enable those skilled in the art to more fully understand the invention, but do not limit the invention in any way. Therefore, although this specification has described the invention in detail with reference to the drawings and embodiments, those skilled in the art should understand that the invention can still be modified or replaced by equivalents. In short, all technical solutions and improvements that do not deviate from the spirit and scope of the invention should be included in the protection scope of the patent for the invention.

Claims

1. A comprehensive interlocking protection device with ship-shore power conversion control function, mainly used in ship power station monitoring system, characterized in that: Integrated ship-to-shore power conversion monitoring system and interlocking protection device; The comprehensive interlocking protection device comprises: a housing kit, a switch quantity input unit and a switch quantity output unit; The housing kit includes: a mechanical housing made of aluminum alloy, an aviation plug connection module configured with a hardware interface using an aviation plug, a power supply module, a CPU main processing module equipped with a protection program and control logic for integrated control of ship power station ship power and shore power conversion and interlocking protection of the power system, and a bus module; The aviation plug connection module and the power supply module are located on the right side plate of the mechanical housing, and are vertically connected to the right side of the bus module through a socket strip. The switch input unit and the switch output unit are vertically connected to the front of the bus module through a socket strip. The CPU main processing module is connected to the back between the bus modules through a socket strip. The CPU main processing module is equipped with protection programs and control logic for comprehensive control of ship power and shore power conversion and interlocking protection of the power system; The switch quantity input unit and the switch quantity output unit adopt standardized circuit boards, which are fixed on the mounting plate and inserted from the front plate of the mechanical housing; The switch input unit collects the switch states of the generator set circuit breaker, the jumper circuit breaker, the bus tie circuit breaker and the shore power circuit breaker, and inputs the data to the CPU main processing module. After processing, the CPU main processing module outputs the control instructions to the switch output unit to realize the conversion and interlocking output of the switch states of the generator set circuit breaker, the jumper circuit breaker, the bus tie circuit breaker and the shore power circuit breaker; The comprehensive interlocking protection device operates independently of other equipment in the power station monitoring system.

2. The integrated interlocking protection device with ship-to-shore power conversion control function according to claim 1 is characterized in that: The mechanical housing component is integrally formed by splicing six sides.

3. The integrated interlocking protection device with ship-to-shore power conversion control function according to claim 1 is characterized in that: The CPU main processing module adopts a dual redundant network design.

4. The integrated interlocking protection device with ship-to-shore power conversion control function according to claim 1 is characterized in that: The aviation plug connection module is located on the right side plate of the mechanical housing and is equipped with a power aviation plug, a CAN network aviation plug, a switch input aviation plug and a switch output aviation plug.

5. The integrated interlocking protection device with ship-to-shore power conversion control function according to claim 1 is characterized in that: The power supply module is provided with a panel, which is located on the right side of the front panel of the mechanical housing and includes a power switch, a power indicator light, a "DB9 type" debugging interface and a power protection device. The power switch independently controls the comprehensive interlocking protection device.

6. The integrated interlocking protection device with ship-to-shore power conversion control function according to claim 1 is characterized in that: Conductive tapes are attached to the contacting surfaces of each aluminum plate of the mechanical housing and to the side edges of the back of the mounting plate.

7. The integrated interlocking protection device with ship-to-shore power conversion control function according to claim 1 is characterized in that: The comprehensive interlocking protection device realizes the interlocking of the jumper circuit breaker: when the switch input unit detects that the jumper circuit breaker is closed, the switch output unit outputs an instruction to lock the last jumper circuit breaker.

8. The integrated interlocking protection device with ship-to-shore power conversion control function according to claim 1 is characterized in that: When the switch input unit detects that the circuit breaker of the emergency plug-in box at the end of the accident power distribution generator is connected, the switch output unit outputs an instruction to lock the internal short-circuit protection function of the generator.

9. The integrated interlocking protection device with ship-to-shore power conversion control function according to claim 1 is characterized in that: When the ship power is converted to shore power, the switch input unit detects that when the shore power circuit breaker is connected in parallel with the ship power circuit breaker, the switch output unit outputs an instruction to disconnect the generator set circuit breaker on the grid; when the shore power is converted to ship power, the switch input unit detects that when the shore power circuit breaker is connected in parallel with the ship power circuit breaker, the switch output unit outputs an instruction to disconnect the shore power circuit breaker on the grid.

10. The integrated interlocking protection device with ship-to-shore power conversion control function according to claim 1, characterized in that: When the switch input unit detects that the power supply is switched from shore power to onboard power, the switch output unit outputs an instruction to semi-automatically connect the designated generator to the shore power in parallel and lock the circuit breakers of the remaining generators; if the switch input unit detects that the shore power circuit breaker in the grid is still disconnected within a specified time after the connection, the switch output unit outputs an instruction to cut off the circuit breaker of the generator set.

11. The integrated interlocking protection device with ship-to-shore power conversion control function according to claim 1, characterized in that: The switch input unit detects that when the shore power supply is switched to the ship power supply, there is more than one generator connected to the shore power grid, and the switch output unit outputs an instruction to lock the shore power circuit breaker; If the switch input unit detects that the grid generator circuit breaker is still disconnected within a specified time after the parallel connection, the switch output unit outputs an instruction to disconnect the shore power circuit breaker.

12. The integrated interlocking protection device with ship-to-shore power conversion control function according to claim 1, characterized in that: When the switch input unit detects that the two ends of the jumper circuit breaker are respectively powered by ship power and shore power, the switch output unit outputs an instruction to lock the jumper circuit breaker.

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