CN111342468A

CN111342468A - Multi-loop feeder safety loop of ship shore power system

Info

Publication number: CN111342468A
Application number: CN202010263276.4A
Authority: CN
Inventors: 周洋; 温莉; 赵莉; 丁笑寒
Original assignee: Jiangsu Zhongzhi Marine Engineering Equipment Co ltd
Current assignee: Jiangsu Xihua Electric Appliance Co ltd
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2020-06-26
Anticipated expiration: 2040-04-07
Also published as: CN111342468B

Abstract

The invention discloses a multi-loop feeder safety loop of a ship shore power system, which has compatibility, safety and practicability and overcomes the defects of the existing ship shore power system in the aspects of compatibility and safety technology. The invention does not change various safety protection functions of the original power connection box and the shore power box which are set according to relevant standards and standards, and realizes the purposes through the following double interlocking: (1) interlocking the shore side power connection box main circuit breaker by using a movable auxiliary contact of the ship side shore power connection box main circuit breaker through a shore power cable and connector control contacts at two ends of the shore power cable; (2) the ship side shore power box main circuit breaker is interlocked by using the dynamic-breaking auxiliary contact for protecting and tripping of the shore side power box main circuit breaker through a shore power cable and the connector control contacts at two ends of the shore power cable.

Description

Multi-loop feeder safety loop of ship shore power system

Technical Field

The invention relates to a multi-loop feeder safety loop of a ship shore power system, and belongs to the technical field of ship electrical equipment.

Background

In recent years, in order to reduce the pollutant discharge during the port of the ship, the regulations of using shore power during the port of the ship are required to be discharged sequentially at home and abroad; the transportation department of China publishes a port and ship shore power management method in 2019, 12 and 9 months (implemented from 2020, 2 and 1 months), and the method requires that the power supply capacity of a wharf shore power facility is adapted to the power demand of a berthing ship; "the installation of new and built Chinese nationality ship power receiving facilities should accord with the legal ship inspection technical rules, and the power receiving facilities are qualified by the ship inspection mechanism before being put into use"; "the Chinese ship berthing in the atmospheric pollution emission control area of the ship needs to meet the requirement of atmospheric pollution emission and install the power receiving facilities of the ship, and the corresponding waterway transportation operator should make the installation plan of the power receiving facilities of the ship and organize and implement the power receiving facilities.

The actual situation of using shore power by the current ship is just like media reports such as Chinese energy newspaper: the actual development of the current harbour shore power is not ideal, the utilization rate of the shore power is low, the utilization rate of the shore power is greatly influenced due to different interface standards. The practical demonstration shows that the shore power system really has technical problems to be solved in the technical aspect.

The national sailing sea ship legal inspection rule and the national sailing sea legal inspection technical rule published by the maritime work office of the people's republic of China are changed in 2018, and are carried out from 2019, 1 month and 1 day,

chapter

1, 2 nd section 11, 2.1.4 regulations of an alternating current low-voltage shore power system, namely that ship electricity and shore electricity are connected through a plug and a socket, the design of the plug and the socket ensures that incorrect connection does not occur and hot plugging and unplugging cannot be carried out, and the plug and the socket meet the accepted standard ①, the plug matched with the ship selects one of the following specifications (1), (450V, 63A), (2), (450V, 125A), (3)450V, 250A), and the comment ① explains that the accepted standard which the plug and the socket meet is IEC60309-5:2017 or other equivalent standards "

IEC60309-5:2017 standard "plug, socket and coupler for industrial use part 5: dimensional compatibility AND interchangeability requirements FOR SOCKETs, PLUGS AND marine connectors FOR low voltage marine electrical connection systems (LVSC) FOR marine vessels, < PLUGS, SOCKET-OUTLETS AND COUPLERS FOR INDUSTRIAL PURPOSES Part 5: Dimensional compatibility AND exchange availability requirements FOR PLUGS, SOCKET-outputs, ship connectors AND ship connectors FOR low-voltage shore connection systems (LVSC) > described in chapter 1 "Range": the present section of "1 EC60309 is applicable to three-phase accessories with a ground contact and four control contacts, which accessories have a maximum rated current of 350A and a maximum rated voltage value of no more than 690V, 50/60 Hz. "< This part of 1EC60309 applications to three-phase access with an earth contact and with a four corner contact. the phase access with a maximum-transmitted current of 350A and an maximum-transmitted operation not obtained 690V 50/60 Hz. Description of the invention

IEC/IEEE80005-3:2016 Port Utility connections-part 3: Low-Voltage Shore power Connection Systems General requirements [ Utility connections in port-Part 3 ] Low Voltage Shore Connection (LVSC) Systems-General requirements ] Specification 7.3.1: "plugs, sockets, connectors and ports for ships shall comply with The requirements of IEC 60309-1and IEC60309-5and The following clauses", "The plug, socket-out, shipon connector and ship in let shell be in access with IEC 60309-1and IEC60309-5and The following claduses", each plug, socket, connector and port for ships shall be equipped with control contacts to verify The continuity of The safety circuit. For a single cable connection, at least 4 control contacts are required. The power plug and socket contact profiles specified by the "< Eachplug, socket-outlet, ship connector and ship inlet housing be fixed with the pilot connections for the continuity verification of the safety circuit, a minimum of the fault pilot connections is required for the IEC/IEEE80005-3:2016 standard are shown in FIG. 1 of this specification, FIG. 1 is a section from FIG. B.2 of the IEC/IEEE80005-3:2016 standard, page 42.

The connector contact structure diagram given by the IEC60309-5:2017 standard is shown in the attached figure 2 of the specification, and the attached figure 2 is cut from the pages 14 of the IEC60309-5:2017 standard in figures 5-II.

IEC 60309-1:2012 "industrial plug, socket and coupler-part 1: general requirements of the specification "Plugs, socket-outlets and couplers for industrial purposes-Part 1: general requirements" are the same as the on-off sequence of the contacts of the connector specified in the IEC/IEEE80005-3:2016 standard, and the IEC/IEEE80005-3:2016 standard specifies "the on-off sequence of the contacts of the connector" as follows: (a) connecting: 1) a ground contact,2) a power contact, 3) a control contact; (b) disconnecting: 1) control contact,2) power contact, 3) ground contact. "< contact sequence shape be in the following form: a) connection: 1) earth contact,2) powercontacts 3) pilot contacts; b) disconnection: 1) pilot contacts,2) power contacts,3) earth contacts. Description of the invention

The control contact of the connector is a part of a safety loop of a ship shore power system, the arrangement and the structure of the contact have definite regulations related to the ship shore power system specification and standard, and the international and domestic relevant specifications and standards are required to ensure that the connector cannot be plugged in and unplugged from a live line.

Article 4.2.3 of JTS155-2019 & lt technical Specification for construction of wharf shore power facilities (implemented in 6/1/2019) approved by the department of transportation in China proposes: when the power supply capacity is less than 630kVA, a low-voltage power supply mode can be adopted; when the power supply capacity is 630-1600 kVA, a high-voltage power supply mode is preferably adopted; when the power supply capacity is larger than 1600kVA, a high-voltage power supply mode is adopted; JTS155-2019 Specification 4.2.7.2: "Low voltage powered connectors may use one or more of tables 4.2.7," see Table 1.

TABLE 1 Low-voltage power supply connector specification table

Note: TABLE 1 TABLE 4.2.7 from JTS155-2019 Standard, page 6

When a low-voltage power supply mode is adopted, when the rated voltage is 400V, and the requirement of the shore capacitance exceeds 174kVA, the rated current exceeds 250A; if the required shore power rated voltage of the ship is 450V and the capacity is 500kVA, the rated current reaches 641A and is far beyond the maximum current value of the low-voltage shore power connector shown in the table 1.

When the capacity of the low shore power required by the ship is large, if a single-loop feeder is adopted, the current and the cable section of the required connector are large, the installation and construction are difficult, and the specification of the standard connector is difficult to meet. With the development of the marine industry, more and more ships at home and abroad have great demand on shore capacitance during port docking. Therefore, the IEC/IEEE80005 standard firstly proposes to adopt a multi-loop feeder in a ship shore power system, and proposes the relation between the number of the multi-loop feeders of the ship shore power system and the shore-facing capacity demand and voltage, and stipulates the related technical requirements.

The IEC/IEEE80005-3:2016 standard notes in the introduction: a ship not using this standard may find it unable to connect to a satisfactory shore power supply. "(shields do not apply this standard major finite equation to connect to compatible score)

The IEC/IEEE80005-3:2016 standard No. 7.3.1 proposes that the number of the multiple feeders of the ship shore power system is as follows: "the number of connections varies according to the power transmitted from shore to ship, as shown in the following table: "(The number of connections vary in recording to The power transferred from shore to lap underflows:

TABLE 2 relationship between feed line loop number and power demand and voltage

(Table 2 Table 1: Table 1-Number of connections as a function of power demand and voltage, taken from IEC/IEEE80005-3:2016 Standard, page 27.)

Table 2 shows the relationship between the number of feeders of the shore power system of the ship and the power and voltage levels required by the ship, and the larger the required power is, the lower the voltage level is, the more the number of feeders connected to the shore power is. For ships with large low-voltage shore power capacity requirements, a plurality of feeders should be adopted. At present, the domestic standard and IEC/IEEE80005-3:2016 standard are not standardized and meet the rail of a ship shore power system by adopting a mode of supplying power to a ship by a plurality of feeders.

Article 4.9 of the IEC/IEEE80005-3:2016 standard requires: marine shore power systems "should provide emergency cut-off facilities, once activated, they will immediately cut off circuit breakers on shore and on board"; "Emergenecy handover failure of human being viewed, human activated, the human being interaction, human being environment, human being on shore and human being ship

IEC/IEEE80005-3:2016 Port Utility connections-part 3: low voltage shore power connection system general requirements standard, clause 7.1 proposes: "compatibility between ship power reception and onshore power supply should be set according to the following rules: physical compatibility between ship and shore like associated by the following tires

a) When the ship is connected to a low-voltage shore power system, necessary number of shore power access ports are set according to the maximum power requirement of the ship;

b) the shore power system provides a necessary number of sockets according to the maximum power required by the ship;

c) the ship is connected to a necessary number of sockets according to the maximum power requirement (all inlet sockets of the ship are connected), and if other sockets are not connected, the safety loop is used for cutting off the power supply;

d) each cable connected to the ship from shore has the same length, is independently controlled and protected, and has an independent safety loop;

〈a)Ships have the necessary number of inlets according to theirmaximal power demand while connected to LVSC system；

b)Shore systems have the necessary number of socket-outlets accordingto the maximalpower that can be supplied；

c)Ship is connected only to the necessary number of socket-outletsaccording to their maximal power demand(all ship inlets shall be connected)；other idle socket-outlets shall be de-energized,with the safety loop open；

d)Each connection cable from shore to ship is controlled andprotected independently,andhas an independent safety loop〉

IEC/IEEE80005-3:2016, 7.3.1 specifies: "all cables required to connect the ship shore should be interlocked. "< Alltables required to connect shim to shore shape be interleaved. And specifies that "safety circuit systems should allow ships of different numbers of feeders to be connected onshore"; a Safety loop system shape down the connection at shore of shifts with differential number of feeds; "during connection to shore power, the opening of one safety loop should trip both the onshore and the vessel safety loops. Tripping of the shore side circuit breaker should disconnect all feeder circuit breakers. "(The meeting of one safety loop connecting shock bolt and lip safety locks, The meeting of shock-side circuit breaker shock bolt all feeder circuits breaker. Description of the invention

The IEC/IEEE80005-3:2016 standard 7.3.1 gives a "safety loop back on more than one feeder (two feeders to the vessel are shown in the figure) as shown in FIG. 6 below. "< Safety loop circuit for more than once onecooler (where two feeders to hip area show) is as follows, figure 6. Fig. 6 shows "Safety loop between a feeder (a) and a feeder (b)", "safe 6-Safety loop scheme circuit for a feeder (a) or a three-way feeders (b)", which is fig. 3 of the present specification, and fig. 3 is a section of fig. 6 of IEC/IEEE80005-3:2016 standard, pages 28-29.

The legend of FIG. 3 of the present specification is as follows:

1. shore side connection electric box control power supply 2, ship side electric box control power supply

3. Under-voltage coil (bank side) 4. bank side safety circuit coil of feeder circuit breaker

5. Main breaker under-voltage coil (ship side) 6 ship side safety circuit coil

7. Bank side emergency control (emergency cut-off including bank side breaker and feeder breaker electrical trip)

8. Ship side emergency control (emergency cut-off including electrical trip of ship-borne powered circuit breaker)

9. Manual emergency cut-off on ship side (two shown) 10 manual emergency cut-off on shore side (two shown)

11. Trip of ship safety loop (see legend 6) 12 trip circuit of bank side feeder safety loop (see example 4)

13. Bank side circuit breaker undervoltage coil 14, ship-borne receives electric distribution board circuit breaker undervoltage coil

Heretofore, the IEC/IEEE80005-3:2014 standard Port public connection facility part 3: low Voltage Shore Connection (LVSC) systems general requirements < Utility connections in port, part 3: Low Voltage Shore Connection (LVSC) systems general requirements > were specified in clause 7.3.1: "safety circuit system shall allow ships with different feeder returns to connect shore power at port" and exemplifies "safety circuit for one feeder as shown in fig. 4a, safety circuit for multi-feeder (3 feeders shown in the figure) as shown in fig. 4 b" and "safety circuit for low voltage shore power system feeder (a) or three feeders (b)" at the same time, i.e. fig. 4 of the present specification, fig. 4 being cut from fig. 4 of IEC/IEEE80005-3:2014 standard page 27; the legend of fig. 4 of the present specification is as follows:

1. shore side connection power box control power supply 2 ship side shore power box control power supply

3. Bank side feed circuit breaker undervoltage coil 4. bank side safety loop coil

5. Ship side shore power box circuit breaker undervoltage coil 6, ship side safety loop coil

7. Shore side emergency cut-off control 8 ship side emergency cut-off control

Since fig. 4b) of the IEC/IEEE 80005-3-2014 standard fails to meet the relevant requirements when supplying power to the shore power box of the multi-loop feeder, the IEC/IEEE 80005-3-2016 standard modifies the multi-loop feeder circuit of the IEC/IEEE 80005-3-2014 standard, that is, as shown in fig. 3 in this specification. The path of the multi-loop feeder line safety loop after the IEC/IEEE80005-3:2016 standard is revised as follows:

the path of the safety circuit of the power connection box is as follows: one end of the 1 st station connection box control power supply → shore side emergency control (legend 7) → shore side manual emergency cut-off button (legend 10) → control contact P1 of the 1 st station connection box receptacle → control contact P1 of the 1 st station connection cable shore side end plug → control contact P1 of the 1 st station connection cable side end plug → control contact P1 of the shore power box 1 st return socket → ship side manual emergency cut-off button (legend 9) → ship side emergency control (legend 8) → trip power-off contact (legend 11) of the ship side safety return coil (legend 6) → control contact P3 of the shore power box 1 st return socket → control contact P3 of the 1 st station power cable side end plug → control contact P3 of the 1 st station connection box receptacle → control contact P3 of the 1 st station connection box circuit breaker (trip coil 3) and the other end of the shore side safety circuit box (legend 4) → control contact of the 1 st station connection box receptacle; the path of the 2 nd station electric box safety loop is the same as the above.

The path of the shore power box safety loop is as follows: shore power box control circuit power supply terminal → ship side emergency control (legend 8) → ship side manual emergency cut-off button (legend 9) → control contact P2 of shore power box first return socket 1 → control contact P2 of shore power cable ship side end plug 1 → control contact P2 of shore power cable shore side end plug 1 → control contact P2 of shore power box socket 1 → shore side manual emergency cut-off button (legend 10) → shore side emergency control (legend 7) → control contact P4 of shore power box socket 1 → control contact P4 of shore power cable shore side end plug 1 → control contact P4 of shore power cable shore side end plug 1 → control contact P4 of electrical box first return socket → ship side emergency control (legend 8) → ship side manual emergency cut-off button (9) → control contact P2 of electrical box second return socket 2 → control contact P2 of electrical cable side end plug 2 → control contact P2 of electrical cable side end plug 2 Point P2 → control contact P2 of the 2 nd station power box socket → shore side manual emergency cut-off button (legend 10) → shore side emergency control (legend 7) → control contact P4 of the 2 nd station power box socket → control contact P4 of the 2 nd shore power cable shore side end plug → control contact P4 of the 2 nd shore power cable boat side end plug → control contact P4 of the shore power box 2 nd return socket → undervoltage trip coil and boat side safety circuit coil (legend 5, legend 6) → the other end of the shore power box control circuit power supply.

The multi-loop feeder safety loop circuit after the IEC/IEEE 80005-3-2016 standard is revised to have the defect that the circuit can not meet all requirements of the standard and relevant specifications on the safety loop. For example: fig. 3 is a schematic diagram showing that a plurality of manual emergency cut-off buttons arranged in each feedback line control loop on the ship side in fig. 4 are changed into 2 manual emergency cut-off buttons (legend 9), a plurality of manual emergency cut-off buttons arranged in each power connection box control loop on the shore side are also changed into 2 manual emergency cut-off buttons (legend 10), when each power connection box is used for respectively feeding power to shore power boxes of a plurality of ships, if any manual emergency cut-off button (legend 9 or legend 10) on the ship side or the shore side is pressed, all circuit breakers of each power connection box and circuit breakers of each ship shore power box are separated, so that all the plurality of ships are powered off, and each power connection box can supply power to the shore power boxes of a plurality of feeders, but lacks compatibility with the shore power boxes of 1 feeder; the shore power boxes of each ship are respectively arranged on the ship, and if the same manual emergency cut-off button (legend 9) at the ship side is required to be connected to the control loop of each shore power box by a control line, the practicability is lacked; each power connection box is provided with a feeder circuit breaker, a manual local cut-off button and a manual emergency cut-off button are arranged in a control loop of each power connection box, and if each dynamic cut-off contact of the same manual emergency cut-off button (legend 10) is respectively connected to the control loop of each power connection box, each power connection box loses independence; the following steps are repeated: the revised figure 3 adds the break contact point of the shore side breaker and the feeder breaker for electrical tripping, the break contact point of the ship side breaker for electrical tripping is added to the ship side emergency cut-off control (legend 8), the legend 7 is connected with the manual emergency cut-off button (legend 10) in series, the legend 8 is connected with the manual emergency cut-off button (legend 9) in series and the break contact point (legend 11) of the ship side safety trip circuit in series, which will happen when the control contacts P1 and P3 of the plugs at both ends of any feedback line are connected with the control contacts P1 and P3 of the shore side and power box sockets, the circuit breaker under-voltage coil (legend 3) of the feedback line connection box and the shore side safety loop (legend 4) are powered on, so that the table power box circuit breaker has the closing condition, because each socket of the multi-loop feeder line connection box is connected with the incoming line side of the main breaker, once a circuit breaker with a power connection box is switched on, all the feeder lines are electrified, and the live plugging of plugs at two ends of other feedback lines can be caused. For another example, the legend 11 of fig. 3 is a dynamic-breaking contact from the ship-side safety circuit coil (legend 6), the legend 6 is connected in parallel with the ship-side main breaker undervoltage coil (legend 5), when the legend 5and legend 6 are energized, the dynamic-breaking contact legend 11 of the legend 6 cuts off the control loops of the shore-side feeder circuit breaker undervoltage coil (legend 3) and the shore-side safety circuit coil (legend 4), so that the shore-side feeder circuit breaker cannot be switched on; legend 12 is a moving contact of legend 4, legend 4 is connected in parallel with legend 3, which means that when legend 3 and legend 4 are powered on, legend 12 is moved on, the shore side undervoltage coil (legend 13) of the circuit breaker can be powered on, which only means that when legend 3 and legend 4 are powered off, legend 13 is also powered off at the same time; the shore side emergency control trip contact (legend 7) is in series with legend 12 and legend 7 is also in series with legend 10, which when legend 7 is tripped will cause legend 3 and legend 13 to trip out of voltage simultaneously, indicating that the safety circuit of fig. 3 is not compatible with shore boxes with different numbers of feeders, no matter what purpose the legend 3 and legend 13 represent the shore side circuit breakers.

In conclusion, the ship uses shore power indirectly during the harboring period, which is a great trend. For ships with large shore power demands, a ship shore power system adopts a multi-loop feeder, a low-voltage shore power box of a ship side power receiving facility is provided with a multi-loop power receiving interface, and a low-voltage power connection box of a shore side power supply facility can be compatible with shore power boxes with different feeder loops. The power connection box is a public facility of a port, and if compatibility, safety and practicability are lacked, not only is resource waste caused, but also negative effects are brought to popularization and application of shore power. At present, similar problems are commonly existed in ship shore power systems at home and abroad.

Disclosure of Invention

The invention aims to provide a multi-loop feeder safety loop of a ship shore power system, which has compatibility, safety and practicability and overcomes the defects of the existing ship shore power system in the aspects of compatibility and safety technology. The invention does not change various safety protection functions of the original power connection box and the shore power box which are set according to relevant standards and standards, and realizes the purposes only by the following double interlocking:

(1) interlocking the shore side power connection box main circuit breaker by using a movable auxiliary contact of the ship side shore power connection box main circuit breaker through a shore power cable and connector control contacts at two ends of the shore power cable;

(2) the ship side shore power box main circuit breaker is interlocked by using the dynamic-breaking auxiliary contact for protecting and tripping of the shore side power box main circuit breaker through a shore power cable and the connector control contacts at two ends of the shore power cable.

The purpose of the invention is realized by the following technical scheme:

the utility model provides a boats and ships bank electricity system is many times feeder safety circuit, bank side power supply unit sets up n bank side junction box, and each bank side junction box is independent, does not have the control line to connect between each other, and every bank side junction box all disposes: the system comprises a breaker QF, a socket XS, a power connection box local stop button 1S and a bank side emergency cut-off button 1SJ, wherein the socket XS meets the IEC60309-5-2017 standard and is provided with a main contact N, a main contact L1, a main contact L2, a main contact L3, a control contact P1, a control contact P2, a control contact P3 and a control contact P4, and the breaker QF accessory is provided with a fault trip signal control contact SY and an undervoltage trip coil 1 YU; the ship-side shore power box comprises a circuit breaker Q, a shore power box on-site stop button S, a ship-side emergency cut-off button SJ and a shore power box power receiving socket XSi, wherein i is 1-n; each of the shore power box power-receiving sockets XSi implements IEC60309-5-2017 standard, and is provided with a main contact N, a main contact L1, a main contact L2, a main contact L3, a control contact P1, a control contact P2, a control contact P3, and a control contact P4; the Q accessory of the circuit breaker is provided with an undervoltage coil YU and n movable closing control contacts;

one end of a shore-side electric box control power supply is connected with one end of an under-voltage tripping coil 1YU of a breaker QF, the other end of the under-voltage tripping coil 1YU is connected with a control contact P2 of a socket XS, a control contact P1 of the socket XS is connected with one end of a power connection box on-site stop button 1S after being connected with a shore-side emergency cut-off button 1SJ in series, the other end of the power connection box on-site stop button 1S is connected with the other end of the power connection box control power supply, one end of a breaker QF fault trip signal contact SY is connected with a control contact P3 of the socket XS, and the other end of the breaker QF fault trip signal contact SY is connected with;

a control contact P1 of each 1-th quay power box power receiving socket XSi is connected with one end of a dynamic closing control contact of a quay power box circuit breaker Q, the other end of the dynamic closing control contact is connected with a control contact P2 of a quay power box power receiving socket, one end of a quay power box local stop button S is connected with one end of a quay power box control power supply, the other end of the quay power box local stop button S is connected with one end of a ship-side emergency cut-off button SJ, the other end of the ship-side emergency cut-off button SJ is connected with a control contact P3 of a 1-th quay power box power receiving socket XS1, one end of an undervoltage tripping coil YU of the circuit breaker Q is connected with the other end of the quay power box control power supply, the other end of the undervoltage tripping coil YU is connected with a control contact P4 of an nth quay power box power receiving socket XSn, and a control contact P4 of an ith quay power box power receiving socket XSi is connected with a control contact P3 of an;

each feedback electric line is connected with a corresponding shore side connection box through a shore power cable, the shore power cable comprises an N wire core, an L1 phase wire core, an L2 phase wire core, an L3 phase wire core, a control wire core P1, a control wire core P2, a control wire core P3 and a control wire core P4, plugs are arranged at two ends of the shore power cable, each plug executes IEC60309-5-2017 standard, and the shore power cable is provided with a main contact N, a main contact L1, a main contact L2, a main contact L3, a control contact P1, a control contact P2, a control contact P3 and a control contact P4, and the main contact N, the main contact L1, the main contact L2, the main contact L3, the control contact P1, the control contact P2, the control contact P3 and the control contact P4 of a shore side shore power box power receiving socket are respectively connected with a main contact N, a main contact L1, a main contact P1 and a control contact, The control contact P3 and the control contact P4 are connected.

The object of the invention can be further achieved by the following technical measures:

in the multi-loop feeder safety loop of the ship shore power supply system, each power connection box on the shore side is provided with a power connection box emergency cut-off interface, the power connection box emergency cut-off interface is arranged between an auxiliary contact P1 of a shore-side power connection box socket XS and a power connection box local stop button 1S, the power-on contacts and the power-on contacts of other protection devices of the shore power supply system during normal operation are connected in series with the shore-side emergency cut-off button 1SJ, and the series circuit is connected between a terminal 1and a terminal 2 of the power connection box emergency cut-off interface so as to ensure that the protection function of the shore power supply system set according to the standard requirement continues to be effective.

The multi-loop feeder safety loop of the ship shore power system is characterized in that a shore power box emergency cut-off interface is arranged on a ship side shore power box, the shore power box emergency cut-off interface is arranged between a shore power box local stop button S and a control contact P3 of a 1 st shore power box power receiving socket XS1, the power-on/off contacts and the power-on/off contacts of other protection devices of the ship side power receiving system in normal time are connected in series with a ship side emergency cut-off button SJ, and the series circuit is connected between a terminal 1and a terminal 2 of the shore power box emergency cut-off interface to ensure that the protection function of the ship side power receiving system set according to the standard requirement continues to be effective.

Compared with the prior art, the invention has the beneficial effects that:

(1) the safety control circuit principle of each electric connection box of the port is completely the same, the control circuit does not need to be changed on site or the number of the feeder lines is selected through a switch, and conditions are created for realizing the standardization and the serialization of electric connection box products;

(2) the shore side junction box and the shore power boxes with different feeder return numbers have compatibility, and because each port junction box circuit is independent and is not connected with each other by a control line, each junction box can be used for feeding to the shore power boxes with 1-n feeder lines, and the shore power boxes with different return number feeder lines can be simultaneously used for feeding to the shore power boxes with different return numbers without changing each low-voltage shore power junction box circuit of the port;

(3) the shore side junction box is unlimited in quantity and general, the ship can determine the electricity receiving return number of the shore junction box according to needs, and the demand of ship shore connection capacitance is met;

(4) each feeder is controlled and protected independently by a feeder breaker of the tieback electric box, and when shore power is connected, a plug and a socket of each feeder are connected well to realize interlocking, so that the safety is improved;

(5) the circuit structure is advanced and simple, the core technology of the safety protection circuit is that the circuit breakers at two sides of the ship shore are subjected to double interlocking, and the ship-side shore power box adopts the main circuit breaker to interlock each movable auxiliary contact with each power connection box main circuit breaker at the shore side; each shore side power connection box is interlocked with a ship side shore power box main circuit breaker by adopting a dynamic breaking auxiliary contact of which the main circuit breaker is protected from tripping; the emergency cut-off interfaces are arranged in the shore side power connection boxes and the ship side shore power box safety circuit, so that the original various protection functions can be ensured to be continuously effective, and the necessary protection functions can be conveniently and newly added.

The safety circuit of the invention has the following advantages:

① only plugs at two ends of n feedback lines are connected with sockets of a shore power box and a power connection box respectively, and after a main circuit breaker of the shore power box is switched on, the under-voltage trippers of n power connection boxes at the shore side are powered on, the circuit breakers of the n power connection boxes have switching-on conditions, and the interlocking can ensure that the plugs at two ends of the n feedback lines cannot be inserted in a charged manner;

② when the plug at any end of any feeder line in n feedback feeder lines is pulled out by mistake, the under-voltage release of each electric connection box and shore power box loses electricity, so that the circuit breakers of n electric connection boxes and the circuit breaker of shore power box all lose voltage and release at the same time, the interlock can ensure that the plugs at two ends of n feeder lines are not pulled out;

③ when the circuit breaker protection of any one of the n feedback feeder circuits is tripped, the under-voltage tripper of the shore power box is powered off, the voltage-loss tripping of the circuit breaker is reset by each movable auxiliary contact, the under-voltage trippers of the n feedback feeder circuits are all powered off, and the circuit breakers are all tripped simultaneously;

④ when the shore power box circuit breaker is tripped, the auxiliary contacts are reset to make all the circuit breakers of n power boxes trip under no-voltage;

⑤ when any shore power cable in n feedback feeder lines has short circuit or open circuit fault, the circuit breakers of each power connection box and the circuit breakers of the shore power box can be switched on without voltage drop and power supply;

⑥ when n power boxes on the shore side feed power to shore power boxes of each shipborne single feeder respectively, the shore side or ship side can be manually and emergently cut off or any side of other protection actions, only the circuit breakers on the two sides of the ship shore of the feeder are cut off, and no influence is caused on other ships to receive shore power;

⑦ when n electric boxes on the shore side feed electricity to shore electric boxes of multiple feeders, circuit breakers of the n electric boxes and circuit breakers of the shipborne shore electric boxes can be immediately cut off when any manual emergency cut-off or any other protection action on the shore side or the ship side is carried out;

⑧ when the circuit breaker protection at the two sides of the ship is tripped or manually and urgently cut off, the manual emergency cut-off button or the dynamic auxiliary contact of the circuit breaker protection trip needs to be manually reset, and the ship can be switched on again;

the functions and advantages of the invention completely meet the requirements of international and domestic relevant specifications and standards on the regulations, safety and technical requirements of low-voltage shore power supply facilities and power receiving facilities.

Drawings

FIG. 1 is a diagram of an IEC/IEEE800005-3-2016 standard power plug and receptacle contact distribution from FIG. B.2 on page 42 of IEC/IEEE 800005-3-2016;

FIG. 2 is a diagram of a contact structure of an IEC60309-5-2017 standard power plug, taken from FIG. 5-11 on page 14 of IEC 60309-5-2017;

FIG. 3 is a safety loop for a multi-feeder of an IEC2016 marine shore power system, which is "the safety loop for feeder (a) and feeder (b) of FIG. 6" on pages 28-29 of the IEC/IEEE 80005-3-2016 standard;

fig. 4 is a safety loop for a multi-loop feeder of a marine shore power system version IEC2014, fig. 4a) is a safety loop for a 1-loop feeder, fig. 4b) is a safety loop for a 3-loop feeder, the safety loop for "loop 1 (a) and loop 3 (b) of the system for LVSCs" fig. 4-LVSC "is captured from page 27 of the IEC/IEEE 80005-3-2014 standard;

FIG. 5 is a safety circuit diagram of the

power connection boxes

1, 2, 3, 4, 5 used in the 5-feedback line shore power box;

fig. 6 is a safety loop in which the

power connection boxes

1, 2, and 3 are simultaneously used for the feedback line 1 shore power box and the feedback line 2 shore power box;

fig. 7 is a layout diagram of core wires of a flexible cable special for ship access low-voltage shore power.

Detailed Description

The invention is further described with reference to the following figures and specific examples.

The invention relates to a multi-loop feeder safety loop of a ship shore power system.A shore power supply device is provided with n shore side connection electric boxes, each shore side connection electric box is independent and is not connected with each other by a control line, and each shore side connection electric box is configured: the system comprises a breaker QF, a socket XS, a power connection box local stop button 1S and a bank side emergency cut-off button 1SJ, wherein the socket XS meets the IEC60309-5-2017 standard and is provided with a main contact N, a main contact L1, a main contact L2, a main contact L3, a control contact P1, a control contact P2, a control contact P3 and a control contact P4, and the breaker QF accessory is provided with a fault trip signal control contact SY and an undervoltage trip coil 1 YU; the ship-side shore power box comprises a circuit breaker Q, a shore power box on-site stop button S, a ship-side emergency cut-off button SJ and a shore power box power receiving socket XSi, wherein i is 1-n; each of the shore power box power-receiving sockets XSi implements IEC60309-5-2017 standard, and is provided with a main contact N, a main contact L1, a main contact L2, a main contact L3, a control contact P1, a control contact P2, a control contact P3, and a control contact P4; the Q accessory of the circuit breaker is provided with an undervoltage coil YU and n movable closing control contacts; one end of a shore-side electric box control power supply is connected with one end of an under-voltage tripping coil 1YU of a breaker QF, the other end of the under-voltage tripping coil 1YU is connected with a control contact P2 of a socket XS, a control contact P1 of the socket XS is connected with one end of a power connection box on-site stop button 1S after being connected with a shore-side emergency cut-off button 1SJ in series, the other end of the power connection box on-site stop button 1S is connected with the other end of the power connection box control power supply, one end of a breaker QF fault trip signal contact SY is connected with a control contact P3 of the socket XS, and the other end of the breaker QF fault trip signal contact SY is connected with; a control contact P1 of each 1-th quay power box power receiving socket XSi is connected with one end of a dynamic closing control contact of a quay power box circuit breaker Q, the other end of the dynamic closing control contact is connected with a control contact P2 of a quay power box power receiving socket, one end of a quay power box local stop button S is connected with one end of a quay power box control power supply, the other end of the quay power box local stop button S is connected with one end of a ship-side emergency cut-off button SJ, the other end of the ship-side emergency cut-off button SJ is connected with a control contact P3 of a 1-th quay power box power receiving socket XS1, one end of an undervoltage tripping coil YU of the circuit breaker Q is connected with the other end of the quay power box control power supply, the other end of the undervoltage tripping coil YU is connected with a control contact P4 of an nth quay power box power receiving socket XSn, and a control contact P4 of an ith quay power box power receiving socket XSi is connected with a control contact P3 of an; each feedback electric line is connected with a corresponding shore side connection box through a shore power cable, the shore power cable comprises an N wire core, an L1 phase wire core, an L2 phase wire core, an L3 phase wire core, a control wire core P1, a control wire core P2, a control wire core P3 and a control wire core P4, plugs are arranged at two ends of the shore power cable, each plug executes IEC60309-5-2017 standard, and the shore power cable is provided with a main contact N, a main contact L1, a main contact L2, a main contact L3, a control contact P1, a control contact P2, a control contact P3 and a control contact P4, and the main contact N, the main contact L1, the main contact L2, the main contact L3, the control contact P1, the control contact P2, the control contact P3 and the control contact P4 of a shore side shore power box power receiving socket are respectively connected with a main contact N, a main contact L1, a main contact P1 and a control contact, The control contact P3 and the control contact P4 are connected.

As shown in fig. 5, which is a diagram of an embodiment of a feedback line safety loop of a ship shore power system 5,

power connection boxes

1, 2, 3, 4 and 5 are simultaneously used for the feedback line shore power box 5.

As shown in fig. 6, 3 power boxes of the port power supply facility simultaneously feed power to shore power boxes with different feeder returns, namely a 1 feedback line safety loop and a 2 feedback line safety loop.

In fig. 6, the shore side 3 connection boxes have the same circuit, and the undervoltage trippers of the main circuit breakers of the connection boxes are respectively 11YU, 21YU and 31 YU; the safe tripping and dynamic breaking auxiliary contacts of the main circuit breakers of the contact boxes are respectively 1SY, 2SY and 3SY, and are respectively dynamic broken when the main circuit breakers are in protection tripping and need to be manually reset after dynamic breaking; the 3 on-site cutting-off buttons of the power connection box are respectively 11S, 21S and 31S; the 3 power connection boxes are respectively provided with emergency cut-off interfaces, self-locking manual emergency cut-off buttons 11SJ, 21SJ and 31SJ are respectively connected between terminals 1and 2 in each emergency cut-off interface, and are manually reset after being pressed down, and the power supply system on the shore side can be respectively connected with the self-locking manual emergency cut-off buttons 11SJ, 21SJ and 31SJ in series in each emergency cut-off interface. The path of the 1 st power connection box safety loop is as follows: one end of the 1 st station power box control power supply → the 1 st station power box local cut-off button (11S) → the 1 st station power box emergency cut-off interface (implemented by taking the emergency cut-off button 11SJ as an example) → the control contact P1 of the 1 st station power box receptacle → the control contact P1 of the 1 st station power cable shore-side end plug → the control contact P1 of the 1 st station power cable shore-side end plug → the control contact P1 of the 1 st return socket of the shore power box → the main breaker actuation auxiliary contact Q1 of the shore power box → the control contact P2 of the 1 st return socket of the shore power box → the control contact P2 of the 1 st station power cable shore-side end plug → the control contact P2 of the 1 st station power cable shore-side end plug → the control contact P2 of the 1 st station power box receptacle → the undervoltage release 11YU of the 1 st station power box circuit breaker → the other end of the 1 st station power box control power supply; the path of the other 2 electric box safety circuits is the same as that of the electric box safety circuit; if the port has n power connection boxes, the paths of the safety loops are all the same.

In a 1 feedback line shore power box safety loop, an undervoltage release of a main breaker of the shore power box is 1 YU; the movable auxiliary contact of the main circuit breaker is Q1; the on-site cutting button is 1S; a self-locking manual emergency cut-off button 1SJ is connected between terminals 1and 2 in the emergency cut-off interface and needs to be manually reset after being pressed down, and the ship side power receiving system, the cable management system, the emergency cut-off buttons at other parts and the dynamic cut-off contacts of other protection devices or the contacts which are dynamically closed in normal time can be connected with the self-locking manual emergency cut-off button 1SJ in the emergency cut-off interface in series; 1 the path of the safe loop of the shore power box of the feedback line is as follows: one end of the shoreline box control power supply → the shoreline box local cut-off button 1S → the shoreline box emergency cut-off interface (in the figure, the emergency cut-off button 1SJ is taken as an example embodiment) → the control contact P3 of the first return socket of the shoreline box → the control contact P3 of the first return shoreline cable side end plug → the control contact P3 of the 1 st return shoreline cable side end plug → the control contact P3 of the 1 st return box socket → the dynamic breaking auxiliary contact 1SY of the 1 st return box circuit breaker protection tripping → the control contact P4 of the 1 st return box socket → the control contact P4 of the 1 st return shoreline cable side end plug → the control contact P4 of the 1 st return socket → the control contact P4 of the electric box first return socket → the undervoltage release 1YU of the electric box main circuit breaker → the other end of the shoreline box control power supply.

In the 2 feedback line shore power box safety loop, the coil of the undervoltage release of the 2 feedback line shore power box main circuit breaker is 2 YU; the movable auxiliary contacts of the main circuit breaker are Q21 and Q22; the on-site cutting button is 2S; a self-locking manual emergency cut-off button 2SJ is connected between terminals 1and 2 in the emergency cut-off interface, and needs to be manually reset after being pressed down, and the ship side power receiving system, the cable management system, the emergency cut-off buttons at other parts and the dynamic cut-off contacts of other protection devices or the dynamic make-and-break contacts in normal time can be connected with the self-locking manual emergency cut-off button 2SJ in the emergency cut-off interface in series; 2 the path of the safe loop of the shore power box of the feedback line is as follows: one end of the shore power box control power supply → the shore power box local cut-off button 2S → the shore power box emergency cut-off interface (in the figure, the emergency cut-off button 2SJ is taken as an example) → the control contact P3 of the shore power box first return outlet → the control contact P3 of the shore power cable side end plug of the 1 st shore power cable side end portion → the control contact P3 of the shore power cable side end plug of the 1 st shore power box outlet → the control contact P3 of the 1 st shore power cable side end plug of the 1 st shore power box outlet → the auxiliary dynamic cut-off contact 2SY of the 1 st shore power box circuit breaker protection trip → the control contact P4 of the 1 st shore power box outlet → the control contact P4 of the 1 st shore power cable side end plug → the control contact P4 of the shore power cable side end plug of the 1 st electrical box → the control contact P4 of the electrical box first return outlet → the control contact P3 of the electrical box side end portion of the 2 nd shore power cable side end plug → the control contact P3 of the 2 nd shore power box terminal plug → the control contact P4832 th shore power box terminal of the electrical box 2 h electrical box terminal plug The dynamic breaking auxiliary contact 3SY of the protector protection tripping → the control contact P4 of the 2 nd trolley box socket → the control contact P4 of the 2 nd shore power cable shore side end plug → the control contact P4 of the 2 nd shore power cable boat side end plug → the control contact P4 of the shore power box 2 nd return socket → the undervoltage tripper 2YU of the shore power box main circuit breaker → the other end of the shore power box control power supply. If the feeder line above the 2 nd loop exists, the path of the safety loop is the same as that of the safety loop; if the number of the dynamic-closing control contacts of the main breaker of the shore power box is not enough, the dynamic-closing control contacts can be expanded by adding the intermediate relay.

The connector for connecting the ship-side shore power box and the shore-side power box adopts plug and socket types specified by international standards such as IEC/IEEE80005-3:2016, IEC60309-5:2017 and the like; each power connection box is provided with 1 socket, the single-feedback line shore power box is provided with 1 socket, and the 2-feedback line shore power box is provided with 2 sockets; according to the requirements of international and domestic relevant specifications and standards, the emergency cut-off signal of the shore power control system is required to adopt a hard wiring mode, so that the control line in the safety circuit adopts the control line in a special shore power flexible cable, the special shore power flexible cable is provided with 3-core phase lines (L1, L2 and L3), 1-core neutral line (N), 1-core protective grounding line (PE), 4-core control lines (P1, P2, P3 and P4) and 2-pair communication lines (H1/H2 and H3/H4), the safety circuit can be generally used in an IT or TN grounding mode and meet the requirements of safety, control, communication and the like, and the arrangement of the cable core lines is shown in the attached figure 7 of the specification; two ends of each shore power cable are respectively provided with a plug which meets the IEC60309-5:2017 standard; control lines P1, P2, P3 and P4 at two ends of each shore power cable are respectively connected with control contacts P1, P2, P3 and P4 of the plug; the safety loop of the single feeder line shore power box is that 1 shore power cable connects 1 power connection box with the single feeder line shore power box; the safety loop of the shore power box with 2 feedback feeders is that 2 shore power cables respectively connect 2 power connection boxes with 2 sockets on the shore power box.

When the plug at two ends of 1 shore power cable is used for plugging the socket of 1 power connection box and the socket of the shore power box of 1 feedback line, the undervoltage tripper coil 1YU of the main circuit breaker of the 1 feedback line shore power box is powered on, the power-on contact Q1 of the main circuit breaker of the shore power box is switched on to the undervoltage tripper coil 11TU of the main circuit breaker of the 1 power connection box after the main circuit breaker of the shore power box is switched on, and the main circuit breaker of the power connection box can be switched on to feed to the shore power box.

When plugs at two ends of 2 shore power cables are plugged into sockets of 2 power boxes and sockets of 2 feeder lines of shore power boxes, an undervoltage tripper coil 2YU of a main breaker of the 2 feedback line shore power box is powered on, a power-on contact Q21 of the main breaker of the shore power box is switched on to a power-on coil 11TU of the undervoltage tripper coil 1 of the main breaker of the power box after the main breaker of the shore power box is switched on, a power-on contact Q22 of the main breaker of the shore power box is switched on to a power-on coil 21TU of the other 1 main breaker of the power box, and the main breaker of the 2 power box can be switched on to feed the 2 feedback line shore power.

The safety interlock protection principle is as follows:

⑴ 1 feedback line safety protection principle:

① under-voltage release 11YU of the shore side connection electric box main breaker is controlled by the ship side shore electric box main breaker auxiliary contact Q1, so as to realize the interlocking of the power supply side by the power receiving side, the two sides of the ship shore are connected by a shore power cable and a connector assembly, before the connector assembly is not connected and the shore electric box main breaker is not switched on, the under-voltage release 11YU of the electric box main breaker is in a power-off state, the electric box main breaker can not be switched on, and the shore electric box main breaker can not be switched on;

② under-voltage tripping coil 1YU of main breaker of ship-side shore power box, the safe tripping of main breaker of power box on the shore side is controlled by auxiliary contact 1SY, thus realizing the interlocking of power supply side to power receiving side, the two sides of ship shore are connected by shore power cable and connector, before the connector is not connected, the under-voltage tripping device 1YU of main breaker of shore power box is in power-off state, the main breaker of shore power box can not be switched on, the main breaker of power box can not be switched on;

③ Shore power cables and plugs at two ends thereof, which connect the ship-side Shore power boxes and the Shore power boxes, are intermediate links of double interlocking and belong to an important component of safety circuit double interlocking, when the plugs at two ends of the Shore power cables are plugged with the power connection boxes and the Shore power boxes, the main breaker of the Shore power boxes has a switch-on condition, and after the switch-on condition, the main breaker of the power connection boxes has a switch-on condition;

④ the ship side main breaker can be tripped in a local brake opening mode or in a fault mode, so that the shore side electric box main breaker can be tripped in a voltage loss mode at the same time;

⑤ when the on-site cut-off button 1S of the ship-side shore power box is pressed down, or after a manual emergency cut-off button 1SJ in the emergency cut-off interface is pressed down, or any protection action in the emergency cut-off interface is carried out, the main circuit breaker of the shore power box can be tripped under the condition of voltage loss, and the main circuit breaker of the shore power box can be tripped under the condition of voltage loss at the same time;

⑥ when the main breaker of the shore side junction box is tripped due to fault safety, the active breaking auxiliary contact 1SY causes the undervoltage tripper 1YU of the main breaker of the shore side junction box to lose power, and the main breaker of the shore side junction box simultaneously loses voltage and trips;

⑦ the feeder circuit breaker of the electric box can be tripped after the local cut-off button 11S of the shore side electric box is pressed down, or after the manual emergency cut-off button 11SJ in the emergency cut-off interface is pressed down, or any protection action in the emergency cut-off interface is carried out;

⑧ when shore power is connected, in the process of electrically pulling out plugs on either side of the ship shore, the main breaker of the ship side shore power box and the main breaker of the shore side power box are simultaneously tripped in an undervoltage mode;

⑨ when the shore power cable and its two-end plug are short-circuited or open-circuited, the main breaker of the ship-side shore power box and the main breaker of the shore-side power box are simultaneously under-voltage tripped.

⑵ 2 safety protection principle of feeder line:

① the under-voltage release of 2 electrical box main circuit breakers on the shore side is 21YU and 31YU respectively, which are controlled by the auxiliary contacts Q21 and Q22 of the ship side shore electrical box main circuit breaker respectively, thereby realizing the interlocking of the power supply side by the power receiving side, the two sides of the ship shore are connected by 2-loop shore power cables and connectors, before the 2-loop connector is not connected and the shore electrical box main circuit breaker is not switched on, the under-voltage release 21YU and 31YU of the 2 electrical box main circuit breakers are in the power-off state, the 2 electrical box main circuit breakers can not be switched on, and the shore electrical box main circuit breaker can not be switched on;

② under-voltage tripping coil 2YU of ship side bank box main breaker, safe tripping of the bank side box main breaker to break the auxiliary contact 2SY and 3SY series control, thus realize the power supply side to the interlocking of the power receiving side, both sides of the ship bank are connected by 2 bank cables and connectors, before the connectors of the 2-circuit feeder are not connected, the under-voltage tripping device 2YU of the bank box main breaker is in the power-off state, the bank box main breaker can not be switched on, and the 2-circuit box main breaker can not be switched on;

③ Shore power cables and plugs at two ends thereof, which connect ship-side and shore-side electrical boxes, are intermediate links of double interlocking and belong to an important component of safety circuit double interlocking, when the plugs at two ends of the Shore power cables are plugged with power connection boxes and the shore power boxes, a main breaker of the shore power boxes has a switch-on condition, and after the switch-on, 2 main breakers of the power connection boxes have the switch-on condition;

④ ship side shore box main circuit breakers are opened in place or tripped due to faults, and auxiliary contacts Q21 and Q22 of the shore box main circuit breakers are disconnected, so that 2 shore side electrical box main circuit breakers lose voltage and trip at the same time;

⑤ when the on-site cut-off button 2S of the ship-side shore power box is pressed down, or after a manual emergency cut-off button 2SJ in the emergency cut-off interface is pressed down, or any protection action in the emergency cut-off interface is carried out, the main circuit breaker of the shore power box can be tripped in a voltage-losing mode, and the main circuit breakers of 2 shore-side power boxes can be tripped in a voltage-losing mode simultaneously;

⑥ when any main breaker of the shore side 2 power connection box is tripped due to fault safety, the active breaking auxiliary contact 2SY or 3SY makes the undervoltage tripper 2YU of the ship side shore box main breaker lose power, and the shore box main breaker simultaneously loses voltage and trips;

⑦ when any local cut-

off button

21S, 31S of the shore side 2 electric boxes is pressed down, or after a manual emergency cut-off button 21SJ or 31SJ in any electric box emergency cut-off interface is pressed down, or any one protection action in any emergency cut-off interface, the feeder circuit breaker of the 2 electric boxes can be released under the condition of no voltage;

⑧ when shore power is connected, in the process of electrically pulling out any plug on any side of the ship shore 2 feeder line, the main breaker of the ship side shore power box and the main breaker of the shore side 2 power connection box are simultaneously tripped in an undervoltage mode;

⑨ when the shore power cable and the plugs at the two ends of the shore power cable are short-circuited or open-circuited, the main circuit breaker of the ship side shore power box and the main circuit breaker of the shore side 2 power box are simultaneously under-voltage tripped.

In summary, compared with the prior art, the invention has the following beneficial effects:

⑴ the multi-loop feeder safety loop of the ship shore power system has clear circuit principle, simple structure, compatibility, safety and advancement:

① the port connection box and shore power box manufactured by the protection principle and the requirement of the invention on the elements are beneficial to forming standardized and serialized products;

② the safety circuit principle of each power connection box of the port is completely the same, each power connection box is an independent power supply facility, has interchangeability and commonality, as long as the port power capacity permits, the number of the power connection boxes is not limited, and is not limited by the voltage, frequency and current grade of the low-voltage shore power system, each power connection box has compatibility with the shore power box with different number of return lines, so as to meet the requirement that the shipborne shore power boxes with different number of feeder lines receive and take shore power;

③ the shore power box on the side of the ship can be provided with i-turn sockets according to the demand of the capacity of the ship on shore (i is 1-n, n is 5) to meet the demand of the capacity on shore during the harbor of the ship and ensure the normal power utilization of the ship during the harbor;

④ As long as the components and safety protection items of the existing power supply facilities of the port meet the requirements of relevant international and domestic standards, the safety loop is technically improved without changing the structures of the power connection box and the shore power box and additionally adding components, so that the technical requirements of the invention can be improved, and various safety protection functions of the power connection box and the shore power box which are originally set according to the requirements of the relevant international and domestic standards can be ensured to be continuously effective;

(2) the electrical principle of the multi-loop feeder safety circuit of the ship shore power system is safe and reliable, each function completely meets each safety regulation of international and domestic relevant specifications and standards on power supply facilities and power receiving facilities of the ship low-voltage shore power system, the defect of IEC80005-3:2016 standard in a safety control schematic diagram of the shore power system multi-loop feeder is effectively overcome, the technical requirements on the ship shore power system in the IEC80005-3:2016 standard and the relevant specifications and standards can be further met, the popularization and the use of the shore power are facilitated, and the technical aspects can be achieved:

① only when the plugs at the two ends of the 1-n return shore power cables at the two sides of the ship shore are respectively connected with the socket of the shore power box and the socket of the power connection box, and the breaker of the shore power box is closed, the breaker of the 1-n power connection box at the port is closed conditionally, the interlock ensures that the plugs at the two ends of each cable are not electrically connected;

② in the process of pulling out plugs at any end of any feeder line of 1-n shore power connection cables at two sides of the ship shore by mistake, all the circuit breakers at two sides of 1-n feeder lines are automatically tripped, and the interlocking ensures that the plugs at two ends of each feeder line are not pulled out;

③ 1, tripping any main breaker of the power connection boxes in a fault mode, and tripping the main breaker of the shore power box in a voltage loss mode;

④ 1, the main circuit breakers of the feedback line shore power boxes from 1 to n are manually switched off or tripped due to faults, and the circuit breakers of 1 to n power connection boxes are all tripped under the condition of voltage loss at the same time;

⑤ 1 short circuit or open circuit fault occurs to any shore power cable of the 1-n feedback feeder, the 1-n circuit breakers connected with the boxes and the 1-n circuit breakers connected with the shore power boxes are all tripped at the same time when the 1-n circuit breakers are switched on, and the 1-n feedback cables cannot be switched on when the 1-n feedback cables are not switched on, thus ensuring that the 1-n feedback cables are protected;

⑥ when the shore side 1-n electric boxes feed to the single feeder shore electric boxes of 1-n ships, the shore side or any position of the ship side can be manually and emergently cut off or any protective function in other protections can be operated, only the circuit breakers on the two sides of the shore of the feeder ship can be cut off, and the power supply of other ships for shore connection is not affected;

⑦ when the shore side 1-n electric boxes are used for feeding to the shore electric boxes of 1-n feeders, any position of the shore side or the ship side is manually and emergently cut off or any protection of other protection functions automatically acts, the circuit breakers of the shore side 1-n electric boxes and the shore electric box circuit breakers of the ship-borne 1-n feeders trip at the same time;

⑧ when the main breaker of the ship side junction box is tripped due to fault, the breaker needs to be manually reset after the safety tripping auxiliary contact is manually reset, and when the self-locking manual emergency cut-off button at any position of the ship side or the ship side is pressed, the breaker needs to be manually reset and then can be switched on again.

(3) In the multi-loop feeder safety loop of the ship shore power supply system, each power connection box on the shore side is provided with an emergency cut-off interface, and a dynamic cut-off contact (comprising a contact which is dynamically closed in normal state) of other protection devices of the shore power supply system can be connected with an emergency cut-off button in series, so that other protection functions of the shore power supply system which are set according to the standard requirement are continuously effective; the ship-side shore power box is provided with an emergency cut-off interface, and a dynamic cut-off contact (comprising a contact which is dynamically closed in normal condition) of other protection devices (such as equipotential protection, cable management system protection and power system related protection) of a ship-side power receiving system can be connected with an emergency cut-off button in series, so that other protection functions of the ship-side power receiving system set according to the standard requirements continue to be effective; and simultaneously, the protection function is beneficial to being newly added. If the shore side or the ship side needs to obtain the signal of the running state of the main breaker of the power connection box or the shore power box, the switching value can be provided by the dynamic breaking or dynamic closing auxiliary contact of the opening/closing of the breaker to alarm or control.

In addition to the above embodiments, the present invention may have other embodiments, and any technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of the claims of the present invention.

Claims

1. The utility model provides a boats and ships bank electricity system is many times feeder safety circuit, its characterized in that, bank side power supply unit sets up n bank side junction boxes, and each bank side junction box is independent, and no control line is connected between each other, and every bank side junction box all disposes: the system comprises a breaker QF, a socket XS, a power connection box local stop button 1S and a bank side emergency cut-off button 1SJ, wherein the socket XS meets the IEC60309-5-2017 standard and is provided with a main contact N, a main contact L1, a main contact L2, a main contact L3, a control contact P1, a control contact P2, a control contact P3 and a control contact P4, and the breaker QF accessory is provided with a fault trip signal control contact SY and an undervoltage trip coil 1 YU; the ship-side shore power box comprises a circuit breaker Q, a shore power box on-site stop button S, a ship-side emergency cut-off button SJ and a shore power box power receiving socket XSi, wherein i is 1-n; each of the shore power box power-receiving sockets XSi implements IEC60309-5-2017 standard, and is provided with a main contact N, a main contact L1, a main contact L2, a main contact L3, a control contact P1, a control contact P2, a control contact P3, and a control contact P4; the Q accessory of the circuit breaker is provided with an undervoltage coil YU and n movable closing control contacts; one end of a shore-side electric box control power supply is connected with one end of an under-voltage tripping coil 1YU of a breaker QF, the other end of the under-voltage tripping coil 1YU is connected with a control contact P2 of a socket XS, a control contact P1 of the socket XS is connected with one end of a power connection box on-site stop button 1S after being connected with a shore-side emergency cut-off button 1SJ in series, the other end of the power connection box on-site stop button 1S is connected with the other end of the power connection box control power supply, one end of a breaker QF fault trip signal contact SY is connected with a control contact P3 of the socket XS, and the other end of the breaker QF fault trip signal contact SY is connected with; a control contact P1 of each 1-th quay power box power receiving socket XSi is connected with one end of a dynamic closing control contact of a quay power box circuit breaker Q, the other end of the dynamic closing control contact is connected with a control contact P2 of a quay power box power receiving socket, one end of a quay power box local stop button S is connected with one end of a quay power box control power supply, the other end of the quay power box local stop button S is connected with one end of a ship-side emergency cut-off button SJ, the other end of the ship-side emergency cut-off button SJ is connected with a control contact P3 of a 1-th quay power box power receiving socket XS1, one end of an undervoltage tripping coil YU of the circuit breaker Q is connected with the other end of the quay power box control power supply, the other end of the undervoltage tripping coil YU is connected with a control contact P4 of an nth quay power box power receiving socket XSn, and a control contact P4 of an ith quay power box power receiving socket XSi is connected with a control contact P3 of an; each feedback electric line is connected with a corresponding shore side connection box through a shore power cable, the shore power cable comprises an N wire core, an L1 phase wire core, an L2 phase wire core, an L3 phase wire core, a control wire core P1, a control wire core P2, a control wire core P3 and a control wire core P4, plugs are arranged at two ends of the shore power cable, each plug executes IEC60309-5-2017 standard, and the shore power cable is provided with a main contact N, a main contact L1, a main contact L2, a main contact L3, a control contact P1, a control contact P2, a control contact P3 and a control contact P4, and the main contact N, the main contact L1, the main contact L2, the main contact L3, the control contact P1, the control contact P2, the control contact P3 and the control contact P4 of a shore side shore power box power receiving socket are respectively connected with a main contact N, a main contact L1, a main contact P1 and a control contact, The control contact P3 and the control contact P4 are connected.

2. The marine shore power system multiloop feeder safety circuit of claim 1, wherein each electrical connection box is provided with an electrical connection box emergency cut-off interface on the shore side, the electrical connection box emergency cut-off interface is provided between an auxiliary contact P1 of the shore side electrical connection box socket XS and the electrical connection box stop-in-place button 1S, the dynamic break contacts and the normal dynamic make contacts of other protection devices of the shore power system are connected in series with the shore side emergency cut-off button 1SJ, and the series circuit is connected between the terminal 1and the terminal 2 of the electrical connection box emergency cut-off interface to ensure that the protection function of the shore power system set according to the standard requirement continues to be effective.

3. The marine shore power system multi-feeder safety circuit as claimed in claim 1, wherein a shore power box emergency cut-off interface is provided at the side of the vessel shore power box, the shore power box emergency cut-off interface is provided between the shore power box stop button S and the control contact P3 of the 1 st shore power box power receptacle XS1, the power-off contacts and normal power-on contacts of other protection devices of the vessel side power system are connected in series with the vessel side emergency cut-off button SJ, and the series circuit is connected between the terminal 1and the terminal 2 of the shore power box emergency cut-off interface to ensure that the protection function of the vessel side power system set according to the specification standard continues to be effective.