CN112701792B - Multifunctional low-voltage high-capacity shore power connection box circuit for port - Google Patents
Multifunctional low-voltage high-capacity shore power connection box circuit for port Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/24—Circuit arrangements for boards or switchyards
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a port multifunctional low-voltage high-capacity shore power connection box circuit which comprises a three-phase lightning-proof and surge protector SPD, a connection box main breaker Q, a three-phase multifunctional monitor MPS, a fuse 1FU, a fuse 2FU, a fuse 3FU, a fuse 1F, a fuse 2F, a fuse 3F, a fuse 4F, a fuse 5F, a current transformer T, a power indicator H and a multifunctional instrument P.
Description
Technical Field
The invention relates to a port multifunctional low-voltage high-capacity shore power connection box circuit, and belongs to the technical field of ship electrical equipment.
Background
Regulations for limiting the emission of atmospheric pollutants from ships during port-closing are becoming more and more strict worldwide, and many countries issue documents that prescribe that the operation of generators on ships should be stopped during port-closing, and port-closing ships use shore power, which has become an inevitable trend in the shipping industry.
In recent years, the relevant departments of the country have issued a series of policies, specifications and standards on the shore power connection of ships in ports in succession, and only the transportation department has issued more than ten files, so that the environmental protection is emphasized, and the ships are driven to use the shore power during the port connection.
In 12 months in 2019, the transportation department issues 'harbour and ship shore power management method' by 45 th order, and 'requirements of quay engineering project units should be according to requirements of legal regulations, mandatory standards and the like', and shore power facilities are synchronously designed and built for newly-built, reconstructed and expanded quay engineering (except for oil and gas chemical engineering quay); and the requirement is that the' Chinese nationality ships berthed in the ship atmospheric pollution emission control area are required to meet the atmospheric pollution emission requirement, the ship power receiving facilities are additionally installed, and the corresponding waterway transport operators should make a ship power receiving facility installation plan and organize and implement.
On the global climate peak in 2020, china presents a ambitious goal of reducing 65% of carbon emission compared with 2005. The shore power is used during the port approaching period of the ship, and compared with the power generation by using fuel oil, the method can greatly reduce the emission of pollutants such as sulfides, nitrogen oxides, particles and the like during the port approaching period of the ship, and is an important way for building a green port and realizing energy conservation and emission reduction. Therefore, popularization of port-leaning ships to use shore power is an important measure for achieving the ambitious goal of emission reduction.
The International Electrotechnical Commission (IEC) was assigned to IEC/IEEE 80005-3 in 2016: 2014 port public connection facility-part 3: low voltage shore power connection (LVSC) system-general requirements [ Utility connections in port-Part3: low Voltage Shore Connection (LVSC) Systems-General requirements ] are modified. Subsequently, the international and domestic related departments correspondingly revise and set a batch of standards/specifications related to the low-voltage shore power system, and the national grid company issues Q/GDW11468.2-2016, technical Specification of Port shore power facilities, section 2: low-voltage high-capacity Power supply, Q/GDW 11468.3-2016 Port shore Power plant Specification 3 rd section: low-voltage small-capacity Power supply, Q/GDW 11468.4-2016 Port shore Power plant Specification 4: shore connection and interface equipment; the transportation department designs technical standards for standardizing the system of the shore power facilities, improves the construction quality of the wharf shore power facilities in China, and issues JTS 155-2019 technical Specification for wharf shore power facility construction and JTS155.1-2019 technical Specification for wharf shore power facility detection; related requirements are provided for aspects such as safety technology of port and dock shore power facilities, etc., by a ' inspection guide 2018 for shore power supply facilities on ships ' shore power ' issued by China Class Society (CCS).
To meet the technical and safety regulations of IEC/IEEE80005-3, IEC 60309-5:2017 issues a mating standard "Industrial plug and socket and coupler—part 5: the dimensional compatibility and interchangeability of sockets, plug-marine connectors and marine input ports for marine low voltage shore power (LVSC) systems requires "[Plugs,socket-outlets and couplers for industrial purposes-Part 5:Dimensional compatibility and interchangeability requirements for plugs,socket-outlets,ship connectors and ship inlets for low-voltage shore connection systems(LVSC)], this standard is stated in the introduction: the single type of plug, socket-marine connector and marine input port (hereinafter referred to simply as accessory) described in this section of "60309 is specially adapted for connecting a marine vessel to an onshore low voltage shore power supply system ."[This part of60309 applies to a single type of plug,socket-outlet,ship connector and ship inlet,hereinafter referred to as accessories,intended to connect ships to dedicated shore supply systems described in IEC/IEEE 80005-3], as described in the IEC/IEEE80005-3 standard and illustrates that this section of" 1ec 60309 is adapted for a three-phase accessory "[This part of 1EC60309 applies to three-phase accessories with an earth contact and with fourpilot contacts].IEC 60309-5：2017 with ground contacts and four control contacts in chapter 5 "standard rating" to provide accessories for shore power systems having "maximum ac operating voltage of 690v 50/60 Hz" [ The maximumAC operating voltage is 690v 50/60Hz ], "maximum rated current of 350A" [ The maximumrated current is a ], and to provide for "the rating of plug, socket, marine connector and marine input port should be a minimum expected short circuit current of 16kA (effective value) 1s, maximum peak withstand current of 40kA"[The plug,socket-outlet,ship inlet and ship connector shall be rated with a minimum prospective short-circuit current withstand of 16kA root mean square(RMS)for 1s,and with a maximum ratedpeak withstand current of40 kA].
IEC 60309-5:2017 provides a standard structure diagram of a socket/plug with standard rated values of 690V and 350A and a standard structure diagram of a marine connector/marine input port, wherein main contacts and control contacts are L1+L2+L3+E+P1+P2+P3+P4, and the standard structure diagram is consistent with contact arrangement of IEC/IEEE 80005-3 standard offshore electric connection accessories, please refer to figure 1 and figure 2 of the specification. The latest release of CCS on-board ships construction specifications modifies the notification, clearly requiring that the input connectors of the on-board low voltage shore power boxes should conform to the accepted IEC 60309-5:2017 standard or other equivalent standard.
Disclosure of Invention
The invention aims to provide a multifunctional low-voltage high-capacity shore power connection box circuit for a port, wherein a shore power interface of the connection box meets international standards, compatibility is ensured, the connection box has the functions of preventing lightning and surge overvoltage, the connection box can prevent plug connectors from being plugged in and out, the connection box meets the protection requirements of the international standard requirements, the connection box is provided with a shore power indication and metering instrument, and the circuit principle of the connection box meets the design requirements of a fault safety principle.
The aim of the invention is realized by the following technical scheme:
A multifunctional low-voltage high-capacity shore power connection box circuit for a port comprises a three-phase lightning protection and surge protector SPD, a main circuit breaker Q of the connection box, a three-phase multifunctional monitor MPS, a fuse 1FU, a fuse 2FU, a fuse 3FU, a fuse 1F, a fuse 2F, a fuse 3F, a fuse 4F, a fuse 5F, a current transformer T, a power indicator H and a multifunctional instrument P, wherein the main circuit breaker Q is provided with an electronic release PR222DS/PD, one end of the three-phase lightning protection and surge protector SPD is grounded, the other end of the three-phase lightning protection and surge protector SPD is connected with an A phase, a B phase and a C phase of a port shore power supply through the fuse 1FU, the fuse 2FU and the fuse 3FU respectively, an L1 end, an L2 end and an L3 end of the three-phase multifunctional monitor MPS are connected with the A phase, the B phase and the C phase of the port shore power supply through the fuse 1F and the fuse 2F and the fuse 3F respectively, the L1 end, the L2 end and the L3 end of the multifunctional instrument P are respectively connected with the L1 end, the L2 end and the L3 end of the three-phase multifunctional monitor MPS, the N end of the multifunctional instrument P is connected with the N phase of the port shore power supply, the In end of the multifunctional instrument P is grounded, the power indicator H is connected between the L1 end and the L2 end of the three-phase multifunctional monitor MPS, the four poles of the main contact inlet end of the main contact inlet circuit breaker Q of the electric box are respectively connected with the N phase, the A phase, the B phase and the C phase of the port shore power supply, the main contact outlet end of the main contact circuit breaker Q of the electric box is respectively connected with the N end, the L1 end, the L2 end and the L3 end of the electric box socket XS, the current transformer T arranged on the shore power supply main circuit is In a star connection way, one end of the secondary winding of the current transformer T is grounded, the other end of the secondary winding of the current transformer T is respectively connected with the Ia end, the Ib end and the Ib end of the Ic of the multifunctional instrument P, the two ends of the fault trip signal indicating contact of the main contact breaker Q of the electric box are respectively connected with the P3 end of the electric box socket SY, between the P4 ends, one end of the fuse 4F and one end of the fuse 5F are connected with the positive electrode and the negative electrode of the DC24V power supply, the other end of the fuse 4F is connected with one end of a voltage-losing coil YU of the main circuit breaker Q of the electric box, the other end of the voltage-losing coil YU of the main circuit breaker Q of the electric box is connected with the P1 end of the electric box socket XS, and the other end of the fuse 5F is connected with the cutting button 1S, the ends 15-18 of the output relay R1 of the three-phase multifunctional monitor MPS and the ends 25-28 of the output relay R2 of the three-phase multifunctional monitor MPS in series and then connected with the P2 end of the electric box socket XS.
The object of the invention can be further achieved by the following technical measures:
The port multifunctional low-voltage high-capacity shore power connection box circuit is characterized in that the model of the three-phase lightning protection and surge protector SPD is 3 xOVR BT23N-8KA/20uS; the model of the three-phase multifunctional monitor MPS is CM-MPS.43; the model of the multifunction meter P is IM301.
In the port multifunctional low-voltage high-capacity shore power connection box circuit, the electronic release PR222DS/PD provided with the main circuit breaker Q is provided with the wireless communication unit BT030, the wireless communication unit BT030 is connected to the test connector of the front panel of the main circuit breaker Q, and the operation data is downloaded and communicated through a 5G mobile phone or a portable computer.
Compared with the prior art, the invention has the beneficial effects that: the shore power interface of the power connection box accords with international standard, ensures compatibility, the power connection box has the functions of lightning protection and surge overvoltage protection, the power connection box can prevent plug connectors from being plugged in and pulled out in an electrified mode, the power connection box meets the protection requirement of the international standard requirement, the power connection box is provided with a shore power indication and metering instrument, and the power connection box circuit principle meets the design requirement of the fault safety principle.
Drawings
FIG. 1 is IEC60309-5;2017, standard rated jack/plug structure;
FIG. 2 is IEC60309-5:2017, a standard structure diagram of a standard rated value marine connector/marine input port;
FIG. 3 is a schematic diagram of a multifunctional low-voltage high-capacity shore power connection box circuit for a port;
FIG. 4 is a diagram of a port multifunctional low-voltage high-capacity shore power connection box and a shipboard low-voltage single-loop shore power box;
fig. 5 is a schematic diagram of a shore power hookup.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
As shown In fig. 3, the multifunctional low-voltage high-capacity shore power connection box circuit for the port comprises a three-phase lightning and surge protection device SPD, a main power connection box breaker Q, a three-phase multifunctional monitor MPS, a fuse 1FU, a fuse 2FU, a fuse 3FU, a fuse 1F, a fuse 2F, a fuse 3F, a fuse 4F, a fuse 5F, a current transformer T, a power indicator H and a multifunctional instrument P, wherein the main power connection box Q is provided with an electronic trip PR222DS/PD, the electronic trip is powered by a DC24V power supply, one end of the three-phase lightning and surge protection device SPD is grounded, the other end of the three-phase lightning and surge protection device SPD is connected with an A phase, a B phase and a C phase of the port shore power supply through the fuse 1FU, the fuse 2FU, the fuse 3FU, the L1 end and the L3 end of the three-phase multifunctional monitor MPS are respectively connected with the A phase, the B phase and the C phase of the port shore power supply through the fuse 1F, the fuse 3F, the L1 end, the L2 end and the L3 end of the multifunctional instrument P are respectively connected with the L1 end, the L2 end and the L3 end of the three-phase multifunctional monitor MPS, the N end of the multifunctional instrument P is connected with the N phase of a port shore power supply, the In end of the multifunctional instrument P is grounded, the power indicator H is connected between the L1 end and the L2 end of the three-phase multifunctional monitor MPS, the four poles of the main contact inlet end of the main contact inlet circuit breaker Q of the electric box are respectively connected with the N phase, the A phase, the B phase and the C phase of the port shore power supply, the four poles of the main contact outlet end of the main contact inlet circuit breaker Q of the electric box are respectively connected with the N end, the L1 end, the L2 end and the L3 end of the electric box socket XS, the current transformer T arranged on the main circuit of the shore power supply is In a star connection method, one end of the secondary winding of the current transformer T is grounded, the other end of the secondary winding of the current transformer T is respectively connected with the Ia end, the Ib end and the Ic end of the multifunctional instrument P, the two ends of a fault tripping signal indicating contact SY of the main circuit breaker Q of the power box are connected between the P3 end and the P4 end of a power box socket XS, one end of a fuse 4F and one end of a fuse 5F are connected with the positive electrode and the negative electrode of a DC24V power supply, the other end of the fuse 4F is connected with one end of a voltage-losing coil YU of the main circuit breaker Q of the power box, the other end of the voltage-losing coil YU of the main circuit breaker Q of the power box is connected with the P1 end of the power box socket XS, and the other end of the fuse 5F is connected with the cut-off button 1S, the ends of an output relay R1 moving contact 15-18 of a three-phase multifunctional monitor MPS and the ends of an output relay R2 moving contact 25-28 of the three-phase multifunctional monitor MPS in series and then connected with the P2 end of the power box socket XS.
The specifications of the electric components in the electric connection box circuit are shown in table 1.
Table 1 electric components and parts table for port multifunction low-voltage large capacity shore power connection box
The technical characteristics of the invention are as follows:
⑴ The shore power interface of the power connection box is an international standard, and compatibility is ensured.
The ships are classified into international navigation ships, domestic navigation ships and inland ships according to the legal inspection rules for ships and offshore facilities issued by the maritime office of China and the ship construction specifications issued by CCS. Technical standards related to low-voltage shore power connection systems published by IEC/IEEE80005-3 and IEC60309-5 are obviously aimed at connecting international ships with port low-voltage shore power, namely, the low-voltage large-capacity power supply in port shore power equipment specified by national network company Q/GDW 11468.2-2016 to supply power to ships. Except for ships such as mail ships and refrigerated container ships, the demand of the marine vessel for low-voltage shore power is generally 250 kVA-1000 kVA as described in Table 1 of chapter 7 of IEC/IEEE80005-3 (relation between connection number and power demand and voltage) [ Number of connections as a function of power DEMAND AND voltage ], wherein the capacity of 250kVA (equivalent to 440V/328A or 690V/209A) is single-loop connection shore power. The socket and the plug of the port connection box are shore power output ports, the marine connector/marine input port of the shipborne shore power box is a shore power input port, and the compatibility between the socket and the marine connector/marine input port is the premise of ensuring that the ship is convenient to connect with shore power. Otherwise, the shore power cannot be used during the port leaning period of the ship.
The shore power outlet of the power receiving box adopts the AC690V with the standard rating value specified by the international standard, 50/60Hz and 350A, and the contacts are the international standard L1+L2+L3+E+P1+P2+P3+P4, which is suitable for supplying power to the shipborne low-voltage shore power box conforming to the IEC/IEEE80005-3 and IEC60309-5 standards. The interfaces of the shore power receiving and power supplying devices on the two sides of the ship and the shore are all accessories with international unified standards, so that the type is single, the capacity is consistent, and the compatibility and the convenience in use are ensured.
⑵ The power connection box can meet the expected short-circuit fault current.
IEC/IEEE80005-3 standard 4.7 "Electrical requirement" [ ELECTRICAL REQUIREMENTS ] specifies: the rated values of the plug, the socket, the connector and the inlet are at least 16kA root mean square value, the rated value lasts for 1s, the plug and the socket with the peak value of 40kA"[Plugs,sockets-outlets,inlets and connectors shall be rated for minimum of 16kA r.m.s.for 1s,and 40kA peak.] as the standard rated value AC690V, 50/60Hz and 350A are selected as the receiving box, the minimum expected short-circuit current rated value is more than or equal to 16kA (root mean square value), the rated peak withstand current is more than or equal to 40kA, and the requirements of IEC/IEEE80005-3 on the short-circuit current tolerance of accessories can be met.
⑶ The power receiving box has the functions of preventing thunder and surge overvoltage.
The power inlet end of the power box is provided with a three-phase lightning-proof and surge protector SPD, and overvoltage formed by lightning and surge can be discharged into the ground.
⑷ The electric connection box can prevent the plug connector from being plugged in and pulled out in an electrified mode.
The under-voltage tripping circuit of the connection box is connected with control contacts P1 and P2 of plug-in connectors on both sides of the ship and the shore in series, and only after the plug-in connectors on both sides of the ship and the shore are connected, the main circuit breaker Q on the shore has a closing condition; after the shore power is connected, in the process of pulling out the plug connector, the main circuit breaker Q on the shore side trips firstly, and the requirements of international and domestic related shore power standards/specifications on 'preventing the plug connector from being plugged in and pulled out' can be met.
⑸ The electric connection box meets the protection requirement of international standard.
The main circuit breaker Q of the power connection box is provided with the electronic release PR222DS/PD with the wireless communication unit BT030, has the functions of inverse time limit overload protection, delay short circuit fault protection, instantaneous short circuit fault protection, grounding fault protection and the like, completely meets the protection requirements of international and domestic standards on a low-voltage shore power connection system, has a wide protection threshold value adjusting range and can meet different requirements; the wireless communication unit BT030 is connected to the test connector of the Q front panel, and can download all operation data and communicate through a 5G mobile phone or a laptop.
⑹ An interface for adding protection is reserved in the power connection box circuit.
The port other protection and interlocking device and the emergency cut-off interface 2XT are reserved in the safe circuit of the junction box. Other protection and control functions (such as reverse power protection, high/low frequency protection, remote control emergency cut-off and the like, which are needed to be added to a system by temporarily transferring loads in parallel by shore power and a ship power station) can be conveniently added, and the break-make contact of the system can be conveniently connected in series to a control loop.
⑺ The auxiliary contact AUX250V is arranged on the main circuit breaker Q of the electric connection box, and the AUX250V can provide the following electrical signals:
Q-main breaker open/close position auxiliary contacts (3 pairs of C/O contacts): the method is used for indicating the switching-on/off signals of the main circuit breaker Q, tripping and alarming and interlocking.
SY-release trip indication auxiliary contact (1 pair of C/O contacts): an electrical signal indicating a trip due to overload or short circuit, under voltage trip, etc., is used to interlock with the shipside shore power chest.
⑻ The power connection box is provided with a shore power indication and metering device.
The power supply indicator lamp H and the multifunctional instrument P are arranged on the power inlet side of the power receiving box, so that the shore power can be indicated to be electrified and the three-phase voltage, current, frequency, active power, reactive power and electric quantity can be displayed.
⑼ The circuit principle of the power connection box meets the design requirement of the fault safety principle.
The principle of the circuit of the power connection box is specified according to IEC/IEEE80005-3, 4.6 ' design requirement ' [ Design requirements ': the Protection and safety system is designed according to the fault safety principle [ Protection AND SAFETY SYSTEMS SHALL be designed based on THE FAIL SAFE PRINCIPLE ], and the three-phase multifunctional monitor MPS is a closed-circuit principle; the MPS phase sequence monitoring function is in accordance with IEC/IEEE80005-3 chapter 5 "Low-voltage shore Power System requirement" [ LV shore supply system requirements ]: the "phase sequence shall be L1-L2-L3 or 1-2-3 or A-B-C or R-S-T, counterclockwise. Before LVSC is powered on or connected in parallel, the phase sequence indicator must indicate that the correct phase sequence "[the phase sequence shall be L1-L2-L3 or 1-2-3or A-B-C or R-S-T,counter clockwise.A phase sequence indicator must indicate correct sequence prior to energizing or paralleling LVSC], sets the phase sequence protection of the junction box according to the normal phase sequence as specified; when the three-phase voltage is normal and the phase sequence is correct, 2 output relays R1 and R2 of the MPS are all attracted, and the moving contact points 15-18 and 25-28 of the MPS are connected with an under-voltage control loop; r1 resets when overvoltage and R2 resets when undervoltage, when the phase sequence of the three-phase voltage is incorrect or (and) phase loss or (and) phase imbalance exceeds a threshold value or (and) the MPS device and the circuit thereof are damaged, both R1 and R2 reset, and the contacts 15-18 and 25-28 reset to cut off a control loop, so that the fault safety is ensured.
⑽ The power connection box can be suitable for ship connection shore power of different systems.
The main breaker Q of the electric connection box is 4 poles (A, B, C, N), the ship power system is a three-phase three-wire insulation system, or a four-wire system with a neutral point grounded, or a ship-mounted low-voltage shore power box with a ship body as a three-wire system with a neutral line loop can be connected with the electric connection box.
⑾ The safe control circuit of the power connection box can meet various safety technical requirements of international and domestic standards/specifications.
The safety control circuit established by the ship-shore linkage principle and the interlocking principle for the power connection box can realize that the main circuit breaker Q cannot be switched on under any one of the following conditions, and the main circuit breaker Q is tripped instantaneously when switched on: ① The auxiliary power supply is powered off; ② Plug connection failure (safety circuit not established); ③ A flexible cable fault connected to shore power; ④ Emergency shut-off facility action; ⑤ MPS is unabsorbed or reset; ⑥ Tripping of the ship side electric circuit breaker fault; ⑦ And any protection action of other protection and interlocking devices of the reserved port.
⑿ The method is beneficial to standardization of low-voltage high-capacity shore power connection box products of ports.
The electric components in the power box circuit are all standard electric products, wherein the shore power supply point shore power output and the ship side power receiving point shore power input interface are single type accessories of international standard, and the standard is uniform; all the units in the power connection box are hard-wired connections specified by international standards and CCS standards, so that the power connection box is easy to manufacture and maintain, and standardized in low-voltage high-capacity shore power connection box products of ports is facilitated.
Examples of the connection box application:
As shown in fig. 4, a "flexible cable dedicated for ship access to low-voltage shore power" (hereinafter referred to as flexible cable, chinese patent No. 201920185630.8) is used to connect a power receiving box with a "ship-borne low-voltage single-loop shore power box" (hereinafter referred to as shore power box, chinese patent No. 202010263258.6), and the connection mode of the shore power box and the power receiving box conforms to the shore power connection mode introduced in fig. 501 of IEC60309-5:2017 standard and fig. a.1 of QGDW11468.4-2015 standard, as shown in fig. 5.
The working principle of the low-voltage high-capacity shore power connection box circuit is as follows:
⑴ When the port shore power supply is connected to the inlet wire end A, B, C, N of the power connection box, if the three-phase voltage is normal and the phase sequence is correct, 2 output relays R1 and R2 of the MPS are all attracted, and the movable contact points 15-18 and 25-28 of the MPS are connected with an undervoltage control loop to allow the Q to be switched on; if the three-phase voltage phase sequence is incorrect or (and) phase loss or (and) phase unbalance exceeds a threshold value or (and) the MPS device and the circuit thereof are damaged, both R1 and R2 are reset, the contacts 15-18 and 25-28 are reset to cut off a control loop, and Q cannot be switched on.
(2) As shown in fig. 4, the plug XP at one side of the power reception box is installed at the side end of the flexible cable, the marine connector XP1 is installed at the side end of the flexible cable, and when the XP is inserted into the socket XS of the power reception box and the XP1 is inserted into the input port XS1 of the shore power box, the under-voltage trip circuit of the main circuit breaker Q of the power reception box and the main circuit breaker QF of the shore power reception box is turned on.
⑶ And switching on Q of the power connection box and QF of the shore power box, and switching on the shore power.
⑷ The ship side can disconnect the button switch SA, and the connection box is not allowed to be closed.
⑸ The main breaker Q of the power receiving box trips due to faults such as overload and short circuit, and the fault trip signal of the auxiliary contact AUX indicates 15/16 of the contact SY to be broken dynamically, and the under-voltage loop of the main breaker QF of the shipside shore power box is cut off to trip QF.
⑹ When the three-phase multifunctional monitor MPS of the power-on box monitors overvoltage, the contact R1 is reset, when the voltage is undervoltage, the contact R2 is reset, when the phase sequence of the three-phase voltage is incorrect or (and) phase loss or (and) phase imbalance exceeds a threshold value or (and) the MPS device and the circuit thereof are damaged, the contacts 15-18 and 25-28 are reset to cut off an undervoltage control loop of Q, and the Q trips.
⑺ When lightning or surge overvoltage occurs, the three-phase lightning protection and surge protector SPD acts to discharge the overvoltage formed by the lightning and the surge to the ground.
⑻ In the process of attempting to electrically unplug the ship side connector XP1 or the shore side plug XP, the control contacts P1, P2, P3 and P4 in the safety control loop are disconnected before the main contacts, so that the under-voltage protection loops on the two sides of the ship shore are powered off, and the circuit breaker Q and the circuit breaker QF trip simultaneously; before the ship side connector XP1 or the shore side plug XP is not inserted, the Q of the power receiving box cannot be switched on, so that electrified insertion cannot occur.
⑼ When the shore-side power connection box or the ship-side shore power connection box (comprising a flexible cable connected with shore power and an auxiliary power supply) fails to perform a protection action, or the cut-off button 1S of the power connection box is not reset, or the cut-off button S of the shore power connection box is not reset, the safety loop established by the control contacts P1, P2, P3 and P4 is cut off, and both side circuit breakers of the ship and the shore cannot be closed, so that the closed instantaneous trip occurs.
In addition to the above embodiments, other embodiments of the present invention are possible, and all technical solutions formed by equivalent substitution or equivalent transformation are within the scope of the present invention.
Claims (1)
1. A multifunctional low-voltage high-capacity shore power connection box circuit for a port is characterized by comprising a three-phase lightning-proof and surge protector SPD, a main circuit breaker Q of the connection box, a three-phase multifunctional monitor MPS, a fuse 1FU, a fuse 2FU, a fuse 3FU, a fuse 1F, a fuse 2F, a fuse 3F, a fuse 4F, a fuse 5F, a current transformer T, a power indicator H and a multifunctional instrument P, wherein the main circuit breaker Q is provided with an electronic trip PR222DS/PD, one end of the three-phase lightning-proof and surge protector SPD is grounded, the other end of the three-phase lightning-proof and surge protector SPD is connected with an A phase, a B phase and a C phase of a shore power supply through the fuse 1FU, the fuse 2FU and the fuse 3FU respectively, an L1 end, an L2 end and an L3 end of the three-phase multifunctional monitor MPS are connected with the A phase, the B phase and the C phase of the shore power supply through the fuse 1F, the fuse 2F and the fuse 3F respectively, the L1 end, the L2 end and the L3 end of the multifunctional instrument P are respectively connected with the L1 end, the L2 end and the L3 end of the three-phase multifunctional monitor MPS, the N end of the multifunctional instrument P is connected with the N phase of a port shore power supply, the In end of the multifunctional instrument P is grounded, the power indicator H is connected between the L1 end and the L2 end of the three-phase multifunctional monitor MPS, the four poles of the main contact inlet end of the main contact inlet circuit breaker Q of the electric box are respectively connected with the N phase, the A phase, the B phase and the C phase of the port shore power supply, the four poles of the main contact outlet end of the main contact inlet circuit breaker Q of the electric box are respectively connected with the N end, the L1 end, the L2 end and the L3 end of the electric box socket XS, the current transformer T arranged on the main circuit of the shore power supply is In a star connection method, one end of the secondary winding of the current transformer T is grounded, the other end of the secondary winding of the current transformer T is respectively connected with the Ia end, the Ib end and the Ic end of the multifunctional instrument P, the two ends of a fault tripping signal indicating contact SY of the main circuit breaker Q of the power box are connected between the P3 end and the P4 end of a power box socket XS, one ends of a fuse 4F and a fuse 5F are connected with the positive electrode and the negative electrode of a DC24V power supply, the other end of the fuse 4F is connected with one end of a voltage-losing coil YU of the main circuit breaker Q of the power box, the other end of the voltage-losing coil YU of the main circuit breaker Q of the power box is connected with the P1 end of the power box socket XS, and the other end of the fuse 5F is connected with the cutting button 1S, the ends of an output relay R1 moving contact 15-18 of a three-phase multifunctional monitor MPS and the ends of an output relay R2 moving contact 25-28 of the three-phase multifunctional monitor MPS in series and then connected with the P2 end of the power box socket XS;
The model of the three-phase lightning protection and surge protector SPD is 3 xOVR BT23N-8KA/20uS; the model of the three-phase multifunctional monitor MPS is CM-MPS.43; the model of the multifunctional instrument P is IM301;
The electronic release PR222DS/PD configured by the main breaker Q is provided with a wireless communication unit BT030, and the wireless communication unit BT030 is connected to a test connector of the front panel of the main breaker Q and downloads and communicates operation data through a 5G mobile phone or a laptop.
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