CN111342468B - Multi-feedback line safety loop of ship shore power system - Google Patents

Multi-feedback line safety loop of ship shore power system Download PDF

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Publication number
CN111342468B
CN111342468B CN202010263276.4A CN202010263276A CN111342468B CN 111342468 B CN111342468 B CN 111342468B CN 202010263276 A CN202010263276 A CN 202010263276A CN 111342468 B CN111342468 B CN 111342468B
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shore
power
contact
box
control
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CN111342468A (en
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周洋
温莉
赵莉
丁笑寒
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Jiangsu Xihua Electric Appliance Co ltd
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Jiangsu Xihua Electric Appliance Co ltd
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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
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
    • H02J3/06—Controlling transfer of power between connected networks; Controlling sharing of load between connected networks
    • 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
    • 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
    • H02B1/26—Casings; Parts thereof or accessories therefor
    • H02B1/46—Boxes; Parts thereof or accessories therefor
    • 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
    • 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
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

The invention discloses a multi-feedback line 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 the safety protection functions of the original power connection box and the shore power connection box according to related specifications and standards, and realizes the purposes by the following double interlocking: (1) Interlocking the shore-side connection box main circuit breaker through the movable auxiliary contacts of the ship-side shore-connection box main circuit breaker and the connector control contacts at two ends of the shore-connection cable; (2) The movable breaking auxiliary contact for protecting and tripping by using the shore side connection box main breaker interlocks the ship side shore side connection box main breaker through the shore power cable and the connector control contacts at two ends of the shore power cable.

Description

Multi-feedback line safety loop of ship shore power system
Technical Field
The invention relates to a multi-feedback line 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 pollutant emissions during port berthing of ships, regulations requiring the use of shore power during port berthing of ships at home and abroad are successively taken out; the department of transportation in China publishes a harbour and ship shore power management method (implemented from the year 2020, month 2 and day 1) on the 12 th month 9 of 2019, and the method requires that the power supply capacity of a wharf shore power facility should be adapted to the power demand of a berthing ship; the installation of the power receiving facilities of newly built and established Chinese nationality ships accords with the legal inspection technical rules of ships, and the power receiving facilities are inspected to be qualified by a ship inspection mechanism before being put into use; the ship is a Chinese nationality ship berthed in an atmospheric pollution emission control area, a ship power receiving facility is additionally installed in the ship atmospheric pollution emission control area, and a corresponding waterway transport operator should make a ship power receiving facility installation plan and organize and implement.
The actual situation of using shore power by the current ship is just like media reports such as China energy report: the actual development of the shore power of the current port is not ideal, the shore power utilization rate is low, and the shore power utilization rate is greatly influenced due to the different interface standards. The practical description shows that the shore power system has technical problems to be solved in technical aspects.
The following 2.1.4 regulations of "alternating low voltage shore power system" in chapter 1, section 2, 11, annual modification notification of the legal inspection technical rules for ships and offshore facilities for sailing in China (implemented from 1 st of 2019) issued by the maritime bureau of the people's republic of China: the ship electricity and the shore power are connected through a plug and a socket. The design of the plug and socket should ensure that improper connection does not occur and that hot plugging is not possible and that the plug and socket should conform to accepted standards ①. The plug matched with the ship is selected according to the load of the ship powered by shore power during the port approaching period, and one of the following specifications is adopted: (1) 450V, 63A; (2) 450V, 125A; (3) 450V, 250A "; the notification note ① states that the accepted standard to which the plug and socket should conform is "IEC60309-5:2017 or other equivalent criteria'
IEC 60309-5:2017 Standard plug, socket and coupler for Industrial purposes section 5: the dimensional compatibility and interchangeability requirements "〈PLUGS,SOCKET-OUTLETS AND COUPLERS FOR INDUSTRIAL PURPOSES Part 5:Dimensional compatibility and interchangeabilityrequirements for plugs,socket-outlets,ship connectors and ship inlets for low-voltage shore connection systems(LVSC)〉 for sockets, plugs, marine connectors for marine low voltage shore power connection systems (LVSC) are described in chapter 1 "range": "1EC 60309 is applicable to three-phase accessories with ground contacts and four control contacts having a maximum rated current of 350A and a maximum rated voltage value of no more than 690V、50/60Hz."〈This part of 1EC 60309applies to three-phase accessories with an earth contact and with four pilot contacts.These accessories have a maximum rated current of 350A and a maximum rated operatingvoltage not exceeding 690V 50/60Hz.〉
IEC/IEEE 80005-3:2016 Port Utility connection-section 3: low voltage shore power connection system general requirement "〈Utility connections in port–Part 3:Low Voltage Shore Connection(LVSC)Systems–General requirements〉, 7.3.1 specifies: "plug, receptacle, marine connector and marine access port shall comply with requirements ",〈The plug,socket-outlet,ship connector and ship inlet shall be in accordance with IEC 60309-1and IEC 60309-5and the following clauses.〉" of IEC 60309-1 and IEC 60309-5 and clauses below each plug, receptacle, marine connector and marine access port shall be equipped with control contacts to verify the continuity of the safety circuit. For a single cable connection, at least 4 power plug and socket contact profiles specified by the control contact ."〈Each plug,socket-outlet,ship connector and ship inlet shall be fitted with pilot contacts for continuity verification of the safety circuit.For single-cable connections,a minimum of four pilot contacts is required.〉IEC/IEEE 80005-3:2016 standard are required as shown in fig. 1 of the specification, fig. 1 being taken from diagram b.2 of IEC/IEEE 80005-3:2016 standard page 42.
The connector contact structure diagram given by the IEC60309-5:2017 standard is shown in fig. 2 of the specification, and fig. 2 is taken from fig. 5-II of page 14 of the IEC60309-5:2017 standard.
IEC 60309-1:2012 industrial plug, socket and coupler-part 1: general requirements (Plugs, socket-outlets and couplers for industrial purposes-Part 1:General requirements) are the same as the contact on-off sequence of the connector specified in IEC/IEEE 80005-3:2016, and the contact on-off sequence of the connector specified in IEC/IEEE 80005-3:2016, 7.3.1, is as follows: (a) connecting: 1) a ground contact, 2) a power contact, 3) a control contact; (b) disconnect: 1) control contacts, 2) power contacts, 3) ground contacts ."〈Contact sequence shall be in the following orde：a)connection：1)earth contact,2)power contacts 3)pilot contacts;b)disconnection：1)pilot contacts,2)power contacts,3)earth contact.〉
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 of the related ship shore power system are definitely specified, and the related international and domestic specifications and standards all require that the connector cannot be plugged in and out in a live mode.
JTS155-2019 approved by the department of transportation of China (code 4.2.3 of construction technical Specification of quay shore Power facilities, implemented on 1 day 6 month of 2019) proposes: when the power supply capacity is smaller than 630kVA, a low-voltage power supply mode can be adopted; when the power supply capacity is 630kVA-1600kVA, a high-voltage power supply mode is adopted; when the power supply capacity is more than 1600kVA, a high-voltage power supply mode is adopted; JTS155-2019 is set forth in clause 4.2.7.2: the "low voltage powered connector may employ one or more of the tables 4.2.7," see table 1.
Table 1 low voltage power connector specification table
Note that: table 1 is referred to from Table 4.2.7 on page 6 of JTS155-2019 standard
When a low-voltage power supply mode is adopted, when the rated voltage is 400V and the demand for shore capacitance exceeds 174kVA, the rated current exceeds 250A; if the rated voltage of the shore power required by the ship is 450V and the capacity is 500kVA, the rated current reaches 641A, and the maximum current value of the low-voltage shore power connector shown in Table 1 is far exceeded.
When the capacity of the low-seat shore power required by the ship is large, if a single-loop feeder line is adopted, the current and the cable section of the required connector are large, so that the installation and construction are difficult, and the specification of the standard connector is difficult to meet. With the development of the maritime industry, more and more domestic and foreign ships have great demands on shore capacitance during berthing to ports. Therefore, the IEC/IEEE 80005 standard firstly proposes to use multiple feed lines in a ship shore power system, and proposes the relation between the number of the multiple feed lines and the demand for the shore capacitance and the voltage of the ship shore power system, thereby prescribing related technical requirements.
The IEC/IEEE 80005-3:2016 standard reminds in the preamble: "a vessel not employing the present standard may find it impossible to connect to a satisfactory shore power supply ."〈Ships that do not apply this standard mayfind it impossible to connect to compliant shore supplies.〉
The number of multi-loop feeders of the ship shore power system proposed by the IEC/IEEE 80005-3:2016 standard 7.3.1 is as follows: the number of connections varies according to the power transferred from shore to ship, as shown in the following table ："〈The number of connections varies according to the power transferred from shore to ship as follows:〉
TABLE 2 relationship between feeder return and power demand and voltage
( Table 2 is truncated from Table 1 at page 27 of IEC/IEEE 80005-3:2016 standard: table 1-Number of connections as a function of power DEMAND AND voltage. )
Table 2 shows the relationship between the number of feeders in the shore power system of the ship and the power and voltage levels required by the ship, the greater the power required and the lower the voltage level, the greater the number of feeders connected to the shore power. For ships with large low-voltage shore power capacity requirements, multiple feed lines should be used. At present, there is no standard and standard in China and IEC/IEEE 80005-3:2016 standard for connecting a ship shore power system in a mode of supplying power to the ship by adopting a plurality of feeder lines.
Clause 4.9 of IEC/IEEE 80005-3:2016 standard: marine shore power systems "should provide emergency disconnect facilities that, once actuated, will immediately disconnect on-shore and on-board circuit breakers ";〈Emergency shutdown facilities shall be provided.When activated,they will instantaneously open circuit-breakers on shore and on-board ship.〉
IEC/IEEE 80005-3:2016 Port Utility connection-section 3: the 7.1 th standard of the general requirement of the low-voltage shore power connection system proposes: the compatibility of ship power reception and onshore power supply is set according to the following rules: physical compatibility between ship and shore shall be assumed by the following rules: "light emitting diode
A) When the ship is connected to the low-voltage shore power system, a necessary number of shore power access ports are arranged according to the maximum power requirement of the ship;
b) The shore power system should provide the necessary number of sockets according to the maximum power required by the ship;
c) The ship is connected to the necessary number of sockets (all the inlet sockets of the ship should be connected) according to the maximum power requirement, if the rest sockets are not connected, the safety circuit should cut off the power supply;
d) The length of each cable connected to the ship from the shore is the same, and the cable is independently controlled and protected and has an independent safety loop;
〈a)Ships have the necessary number of inlets according to their maximal power demand while connected to LVSC system;
b)Shore systems have the necessary number of socket-outlets according to the maximalpower that can be supplied;
c)Ship is connected only to the necessary number of socket-outlets according 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 and protected independently,andhas an independent safety loop〉
IEC/IEEE 80005-3:2016, 7.3.1, specifies: "all cables required to connect the shore should be interlocked. "< All cables required to connect ship to shore shall be interlocked. And states that "safety circuit system should allow vessels of different numbers of feeders to be connected ";〈Safety loop system shall allow the connection at shore of ships with different number of feeders〉;" onshore, the opening of one safety circuit should trip both onshore and vessel safety circuits simultaneously during connection of shore power. Tripping of the shore side circuit breaker should open all feeder circuit breakers ."〈The opening of one safety loop during connection shall trip both shore and ship safety loops.The tripping of shore-side circuit breaker shall open all feeder circuit breakers.〉
The safety loop of more than one feeder (two feeders to the ship are shown in the Figure) is given in IEC/IEEE 80005-3:2016 standard 7.3.1, ."〈Safety loop circuit for more than one feeder(here two feeders to ship are shown)is as following,figure 6.〉 is shown in fig. 6 below, and fig. 6 is the safety loop of "one feeder (a) and three feeders (b)", figure 6-Safety loop schematic circuit for one feeder (a) or THREE FEEDERS (b), fig. 3 of the present specification, fig. 3 being cut from pages 28-29 of IEC/IEEE 80005-3:2016 standard.
The legend of fig. 3 of the present description is as follows:
1. Shore side power box control power supply 2, ship side power box control power supply
3. Feeder circuit breaker undervoltage coil (shore side) 4. Shore side safety circuit coil
5. Under-voltage coil (shipside) 6 of main breaker shipside safety circuit coil
7. Shore emergency control (emergency cut-off includes electrical tripping of shore circuit breakers and feeder circuit breakers)
8. Shipside emergency control (emergency cut-off includes electrical tripping of shipboard power receiving circuit breaker)
9. Ship side manual emergency cut-off (two shown) 10 shore side manual emergency cut-off (two shown)
11. Ship safety circuit trip (see FIG. 6) 12. Shore side feeder safety circuit trip circuit (see FIG. 4)
13. Under-voltage coil 14 of shore side breaker, under-voltage coil of shipborne power receiving distribution board circuit breaker
Heretofore, the IEC/IEEE 80005-3:2014 standard, port utility connection, section 3: low voltage shore power connection (LVSC) system general requirement "〈Utility connections in port.Part 3:Low Voltage Shore Connection(LVSC)Systems.General requirements〉 was specified in clause 7.3.1: "safety circuit system should allow ships with different feeder returns to connect shore power at ports" and illustrates "safety circuit of one feeder is shown in fig. 4a, safety circuit of multiple feeder (3 feeder is shown in the figure) is shown in fig. 4 b)", while "safety circuit of one feeder (a) or three feeders (b) of fig. 4-low voltage shore power system", i.e. fig. 4 of the present specification, fig. 4 cut from IEC/IEEE 80005-3:2014 standard page 27, fig. 4; the legend of fig. 4 of the present description is as follows:
1. Shore-side power box control power supply 2. Ship-side shore power box control power supply
3. Under-voltage coil 4 of shore-side feed circuit breaker, shore-side safety loop coil
5. Ship side shore power box breaker undervoltage coil 6, ship side safety loop coil
7. Shore side emergency cut-off control 8, ship side emergency cut-off control
9. Ship side manual emergency cut-off (two shown) 10 shore side manual emergency cut-off (two shown)
Since fig. 4 b) of the IEC/IEEE 80005-3-2014 standard fails to meet the relevant requirements when powering a shore power box of a multi-loop feeder, the IEC/IEEE 80005-3-2016 standard modifies the multi-feedback line circuit of the IEC/IEEE 80005-3-2014 standard, as shown in fig. 3 of the present specification. The paths of the IEC/IEEE 80005-3:2016 standard revised multi-feedback line safety loop are as follows:
The path of the safety loop of the junction box is as follows: one end of a 1 st power box control power source- & gt shore side emergency control (figure 7) & gt shore side manual emergency cut-off button (figure 10) & gt control contact P1 of a 1 st power box socket- & gt control contact P1 of a 1 st shore power cable shore side end plug- & gt control contact P1 of a 1 st shore power box ship side end plug- & gt control contact P1 of a 1 st back socket of the shore power box- & gt ship side manual emergency cut-off button (figure 9) & gt ship side emergency control (figure 8) & gt trip break contact (figure 11) of a ship side safety loop coil (figure 6) & gt control contact P3 of a 1 st back socket of the shore power box- & gt control contact P3 of a 1 st shore power cable shore side end plug- & gt control contact P3 of a 1 st power box socket- & gt control contact P3 of a 1 st power box breaker under voltage trip coil (figure 3) and a shore side safety loop coil (figure 4) & gt another end of a 1 st power box control power source; the path of the safety loop of the 2 nd power connection box is the same as that of the safety loop of the 2 nd power connection box.
The path of the shore power box safety loop is as follows: one end of the shore power box control loop power supply- & gt a shipside emergency control (legend 8) & gt a shipside manual emergency cut-off button (legend 9) & gt a control contact P2 of a1 st shore power box back end plug- & gt a control contact P2 of a1 st shore power cable back end plug- & gt a control contact P2 of a1 st land power box jack- & gt a shore side emergency cut-off button (legend 10) & gt a shore side emergency control (legend 7) & gt a control contact P4 of a1 st land power box jack- & gt a control contact P4 of a1 st shore power cable back end plug- & gt a control contact P4 of a1 st shore power box back end plug- & gt a control contact P4 of a shipside emergency control (legend 8) & gt a shipside manual emergency cut-off button (legend 9) & gt a control contact P2 of a2 back socket of a shipside shore power box, a control contact P2 of a2 nd shore power box back end plug- & gt a control contact P2 of a control box back end plug- & gt a control contact P2 of a side emergency cut-off button (legend 10) & gt a control contact P4 of a shipside emergency cut-off button (legend 2) of a shipside electrical box back end plug and a side emergency cut-off button (legend 2) of a side electrical box back end 2 of a control plug).
The IEC/IEEE 80005-3-2016 standard revised multi-feedback line safety loop circuit still has drawbacks that do not meet all the requirements of the safety loop for this standard and related specifications. For example: fig. 3 is a view showing that the plurality of manual emergency cut-off buttons provided in each of the feedback line control circuits on the ship side in fig. 4 are changed to 2 manual emergency cut-off buttons (fig. 9), the plurality of manual emergency cut-off buttons provided in each of the ship side electric box control circuits are also changed to 2 manual emergency cut-off buttons (fig. 10), when each electric box is used to feed electricity to the shore electric boxes of a plurality of ships respectively, if any one of the ship side or the shore side manual emergency cut-off button (fig. 9 or fig. 10) is pressed, the circuit breaker of each electric box and the circuit breaker of each ship shore electric box are all separated, causing all of the plurality of ships to lose electricity, each electric box can supply electricity to the shore electric boxes of a plurality of feeder lines, but lack compatibility with 1 feeder line shore power boxes; the shore power boxes of all ships are respectively arranged on the ships, if the control lines for all the break-make contacts of the same manual emergency break button (shown in 9) on the sides of the ships are respectively connected to the control loops of the shore power boxes of all the ships, the reality is lacking; each power connection box is provided with a feeder breaker, a manual on-site cut-off button and a manual emergency cut-off button are arranged in a control loop of the feeder breaker, and if each movable cut-off point of the same manual emergency cut-off button (shown as a figure 10) is connected to the control loop of each power connection box respectively, the power connection boxes lose independence; and the following steps: the revised figure 3 adds a break contact for the shore side emergency control (figure 7) including the electrical tripping of the shore side circuit breaker and the feeder circuit breaker, adds a break contact for the electrical tripping of the ship side power receiving circuit breaker to the ship side emergency cut control (figure 8), and the figure 7 is connected in series with a manual emergency cut button (figure 10), the figure 8 is connected in series with the manual emergency cut button (figure 9) and the break contact of the ship side safety trip circuit (figure 11), which occurs when the control contacts P1 and P3 of the plugs at the two ends of any feedback line are connected with the control contacts P1 and P3 of the shore side electric box and the socket of the electric box, the under-voltage coil (figure 3) and the safety loop coil (figure 4) of the circuit breaker of the feedback line electric box are already electrified, the circuit breaker of the power connection box has the closing condition, and as each socket of the multi-feedback line shore power box is connected with the inlet side of the main circuit breaker, once the circuit breaker of one power connection box is closed, all the feeder lines are electrified, and the plugs at the two ends of other feedback lines can be electrified to be plugged in and plugged out. As another example, the legend 11 of fig. 3 is a break contact from a ship side safety circuit coil (legend 6), the legend 6 is connected in parallel with a ship side main breaker under-voltage coil (legend 5), when the legend 5 and the legend 6 are powered on, the break contact legend 11 of the legend 6 cuts off a control loop of the shore side feeder breaker under-voltage coil (legend 3) and the shore side safety circuit coil (legend 4) so that the shore side feeder breaker cannot be switched on; legend 12 is the trip contact from legend 4, legend 4 is connected in parallel with legend 3, which means that legend 12 is to be tripped after legend 3 and legend 4 are energized, and the bank side breaker under-voltage coil (legend 13) is energized, which only means that legend 13 is also tripped when legend 3 and legend 4 are de-energized; the movable breaking contact (figure 7) and figure 12 of the bank side emergency control are connected in series, the figure 7 is also connected in series with the figure 10, when the figure 7 is broken, the figure 3 and the figure 13 are simultaneously subjected to voltage loss tripping, and no matter what purpose the figure 3 and the figure 13 represent the circuit breaker on the bank side, the safety circuit of figure 3 cannot be compatible with bank electric boxes with different feeder numbers.
In summary, the shore power is used during the port approaching period of the ship, and the ship tends to be huge. For ships with larger shore power requirements, a ship shore power system should adopt a multi-loop feeder, a low-voltage shore power box of a ship side power receiving facility should be provided with a multi-loop power receiving interface, and a low-voltage power box of a shore side power supply facility should be compatible with shore power boxes with different feeder loops. The power connection box is public facilities of ports, if the compatibility, the safety and the practicability are lacked, not only is the resource wasted, but also the popularization and the application of the shore power are negatively influenced. At present, similar problems are commonly existing in ship shore power systems at home and abroad.
Disclosure of Invention
The invention aims to provide a multi-feedback line 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 connection box according to related specifications and standards, and achieves the aims only through the following double interlocking:
(1) Interlocking the shore-side connection box main circuit breaker through the movable auxiliary contacts of the ship-side shore-connection box main circuit breaker and the connector control contacts at two ends of the shore-connection cable;
(2) The movable breaking auxiliary contact for protecting and tripping by using the shore side connection box main breaker interlocks the ship side shore side connection box main breaker through the shore power cable and the connector control contacts at two ends of the shore power cable.
The aim of the invention is realized by the following technical scheme:
A multi-feedback line safety loop of a ship shore power system is characterized in that a shore power supply device is provided with n shore power boxes, each shore power box is independent and is connected with each other without a control line, and each shore power box is configured with: the circuit breaker QF, the socket XS, the on-site stop button 1S of the power connection box and the shore-side emergency cut-off button 1SJ are in accordance with IEC60309-5-2017 standard, and the circuit breaker QF accessory comprises 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, wherein the circuit breaker QF accessory is provided with a fault tripping signal control contact SY and an under-voltage tripping coil 1YU; the shipside shore power box comprises a breaker Q, a shore power box on-site stop button S, a shipside emergency cut-off button SJ and a shore power box power receiving socket XSi, i=1-n; each shore power box power socket 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 circuit breaker Q accessory is provided with an undervoltage coil YU and n movable closing control contacts;
one end of a shore-side power connection box control power supply is connected with one end of an undervoltage tripping coil 1YU of a breaker QF, the other end of the undervoltage tripping coil 1YU is connected with a control contact P2 of a socket XS, the control contact P1 of the socket XS is connected with one end of a shore-side emergency cut-off button 1SJ in series and then is connected with one end of a power connection box on-site stop button 1S, 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 tripping signal contact SY is connected with a control contact P3 of the socket XS, and the other end of the breaker QF fault tripping signal contact SY is connected with a control contact P4 of the socket XS;
The control contact P1 of each 1-side emergency cut-off button SJ is connected with one end of a movable control contact of a shore power box breaker Q, the other end of the movable control contact is connected with the control contact P2 of the shore power box power receiving socket, one end of a local shore power box stop button S is connected with one end of a shore power box control power supply, the other end of the local shore power box 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 the control contact P3 of the 1-side shore power box power receiving socket XS1, one end of an under-voltage tripping coil YU of the breaker Q is connected with the other end of the shore power box control power supply, the other end of the under-voltage tripping coil YU is connected with the control contact P4 of the n-th shore power box power receiving socket XSn, the control contact P4 of the i-th shore power box power receiving socket XSi is connected with the control contact P3 of the i+1-th power box power receiving socket XSi+1, and i=1-n-1;
Each feedback electric line is connected with a corresponding shore-side junction box through a shore-power cable, the shore-power cable comprises an N wire core, an L1 wire core, an L2 wire core, an L3 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 implements IEC60309-5-2017 standard, the shore-power cable comprises 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 control contact P3 and the control contact P4 of the shore-side junction box socket XS are respectively connected with the main contact N, the main contact L1, the main contact L2, the main contact L3, the control contact P1 and the control contact P4 in a plugging manner.
The object of the invention can be further achieved by the following technical measures:
in the multi-feedback line safety loop of the ship shore power system, the emergency cut-off interfaces of the electric boxes are arranged on the shore-side electric boxes, the emergency cut-off interfaces of the electric boxes are arranged between the auxiliary contacts P1 of the socket XS of the shore-side electric boxes and the on-site stop button 1S of the electric boxes, the movable cut-off contacts of other protection devices of the shore-side power supply system and the movable contact in normal are connected in series with the emergency cut-off button 1SJ of the shore-side electric boxes, and the series circuit is connected between the terminals 1 and 2 of the emergency cut-off interfaces of the electric boxes so as to ensure that the protection function of the shore-side power supply system, which is set according to the standard requirement, is continuously effective.
The multi-feedback line 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 local stop button S of the shore power box and a control contact P3 of a 1 st shore power box power receiving socket XS1, movable break contacts of other protection devices of the ship side power receiving system and movable contact points in normal are connected in series with the ship side emergency cut-off button SJ, and the series circuit is connected between a terminal 1 and a terminal 2 of the shore power box emergency cut-off interface so as to ensure that the protection function of the ship side power receiving system, which is set according to the standard requirement, is continuously effective.
Compared with the prior art, the invention has the beneficial effects that:
(1) The principle of the safety control circuit of each junction box of the port is completely the same, the control circuit is not required to be changed on site or the quantity of feeder lines is selected through a switch, and conditions are created for realizing the standardization and serialization of the junction box products;
(2) The shore-side power boxes and the shore-power boxes with different feeder numbers have compatibility, and because the circuits of the shore-side power boxes are independent and are not connected with each other by control lines, each power box can be used for feeding power to the shore-power boxes with 1 to n feeder lines, and the shore-power boxes with different feeder numbers can be simultaneously used for feeding power to the shore-power boxes with different feeder numbers without any change to the circuits of the shore-side power boxes with different feeder numbers;
(3) The number of the shore-side power boxes is not limited and is universal, and the ship can determine the power receiving return number of the shore-side power boxes according to the needs, so that the demand of the ship on the shore capacitance is met;
(4) Each feeder line is controlled and protected independently by a feeder line breaker of the loop-back electric box, and plugs and sockets of each feeder line are required to be connected well to realize interlocking when the shore power is connected, so that the safety is improved;
(5) The invention has advanced and simple circuit structure, and the core technology of the safety protection circuit is to double-interlock the circuit breakers at both sides of the ship shore, and the ship side shore power box adopts all movable auxiliary contacts of the main circuit breaker to respectively interlock with all power box main circuit breakers at the shore side; each shore-side power connection box adopts a movable disconnection auxiliary contact for protecting and tripping of a main breaker to interlock with the main breaker of the shore-side power connection box; the emergency cut-off interfaces are arranged in the safety loops of the shore-side power boxes and the ship-side shore power boxes, so that the original protection functions can be ensured to be effective, and the necessary protection functions can be added newly.
The safety circuit of the invention has the following advantages:
① Only after the plugs at the two ends of the n feedback lines are connected with the sockets of the shore power box and the power box respectively and a main breaker of the shore power box is switched on, the under-voltage tripper of the n power boxes at the shore side is powered on, the breakers of the n power boxes have switching on conditions, and the interlocking can ensure that the plugs at the two ends of the n feedback lines are not electrified to be inserted;
② When any plug at any end of any feeder line in the n feedback lines is pulled out by mistake, the undervoltage tripper of each power connection box and the shore power box is powered off, so that all the circuit breakers of the n power connection boxes and the circuit breakers of the shore power boxes are powered off and tripped at the same time, and the interlocking can ensure that the plugs at the two ends of the n feeder lines are not pulled out by electricity;
③ When the protection of any circuit breaker of the n feeder lines is tripped, the under-voltage tripper of the shore power box is deenergized, each movable auxiliary contact of the circuit breaker for the undervoltage trip is restored, all the under-voltage trippers of the n feeder lines are deenergized, and all the circuit breakers are tripped at the same time;
④ When the protection of the shore power box breaker is tripped, all the movable auxiliary contacts are restored, so that all the breakers of the n power boxes are subjected to voltage-losing trip;
⑤ When any shore power cable in the n feedback lines has short circuit or open circuit fault, the circuit breakers of all the power boxes and the circuit breakers of the shore power boxes can be subjected to voltage loss tripping after all the switching-on, and the switching-on is not performed without a power supply;
⑥ When n power boxes on the shore side feed power to the shore power boxes of each shipborne single feeder line respectively, the method can be realized: the manual emergency cutting off of the shore side or the ship side or other protective actions of any side only cuts off the circuit breakers on the two sides of the ship shore of the feeder line, and has no influence on the shore power for other ships;
⑦ When n power boxes on the shore side feed electricity to the shore power boxes of the plurality of feeder lines, the circuit breaker of the n power boxes and the circuit breaker of the shipborne shore power box can be immediately cut off when any manual emergency cutting off or any protection action of other protection is carried out on the shore side or the shipside;
⑧ When the circuit breakers on two sides of the ship bank are tripped or cut off in an emergency manually, a manual emergency cut-off button or a movable auxiliary contact of the circuit breaker trip is required to be reset manually, and the circuit breakers can be switched on again;
the invention has the functions and advantages of completely meeting the international and domestic related 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 IEC/IEEE800005-3-2016 standard power plug and socket contact profiles, screenshot being taken from IEC/IEEE800005-3-2016, page 42, diagram B.2;
FIG. 2 is a block diagram of IEC 60309-5-2017 standard power plug contacts, taken from FIGS. 5-11 on page 14 of IEC 60309-5-2017;
FIG. 3 is a safety loop of an IEC2016 version of a marine shore power system multi-loop feeder, screenshot from IEC/IEEE 80005-3-2016 standard pages 28-29 "safety loop of FIG. 6 one-loop feeder (a) and three-loop feeder (b)";
FIG. 4 is a safety loop of an IEC2014 version of a marine shore power system multi-loop feeder, FIG. 4 a) is a safety loop of a 1-loop feeder, FIG. 4 b) is a safety loop of a 3-loop feeder, screenshot from IEC/IEEE 80005-3-2014 standard page 27 "safety loops of FIGS. 4-LVSC System 1-loop feeder (a) and 3-loop feeder (b)";
FIG. 5 is a diagram of the safety circuit of the power boxes 1, 2,3, 4, 5 for 5-feedback line shore power boxes at the same time;
FIG. 6 shows the safety circuits of the power boxes 1,2, 3 for both the 1-feedback line shore power box and the 2-feedback line shore power box;
Fig. 7 is a layout of a special flexible cable core wire for accessing a ship to low-voltage shore power.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
The invention relates to a multi-feedback line safety loop of a ship shore power system, wherein a shore power supply device is provided with n shore power boxes, each shore power box is independent and is connected with each other without a control line, and each shore power box is provided with: the circuit breaker QF, the socket XS, the on-site stop button 1S of the power connection box and the shore-side emergency cut-off button 1SJ are in accordance with IEC60309-5-2017 standard, and the circuit breaker QF accessory comprises 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, wherein the circuit breaker QF accessory is provided with a fault tripping signal control contact SY and an under-voltage tripping coil 1YU; the shipside shore power box comprises a breaker Q, a shore power box on-site stop button S, a shipside emergency cut-off button SJ and a shore power box power receiving socket XSi, i=1-n; each shore power box power socket 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 circuit breaker Q accessory is provided with an undervoltage coil YU and n movable closing control contacts; one end of a shore-side power connection box control power supply is connected with one end of an undervoltage tripping coil 1YU of a breaker QF, the other end of the undervoltage tripping coil 1YU is connected with a control contact P2 of a socket XS, the control contact P1 of the socket XS is connected with one end of a shore-side emergency cut-off button 1SJ in series and then is connected with one end of a power connection box on-site stop button 1S, 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 tripping signal contact SY is connected with a control contact P3 of the socket XS, and the other end of the breaker QF fault tripping signal contact SY is connected with a control contact P4 of the socket XS; the control contact P1 of each 1-side emergency cut-off button Sj is connected with one end of a movable control contact of the shore power box breaker Q, the other end of the movable control contact is connected with the control contact P2 of the shore power box power receiving socket, one end of a shore power box on-site stop button S is connected with one end of a shore power box control power supply, the other end of the shore power box on-site 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 the control contact P3 of the 1-side shore power box power receiving socket XS1, one end of an under-voltage trip coil YU of the breaker Q is connected with the other end of the shore power box control power supply, the other end of the under-voltage trip coil YU is connected with the control contact P4 of the n-side emergency cut-off button Sj power box power receiving socket XSn, the control contact P4 of the i-th shore power returning box power receiving socket XSi is connected with the control contact P3 of the i+1-th shore power returning box power receiving socket XSi+1, wherein i=1-n-1; each feedback electric line is connected with a corresponding shore-side junction box through a shore power cable, the shore power cable comprises an N wire core, an L1 wire core, an L2 wire core, an L3 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 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, and a main contact N, a main contact L1 of a ship-side shore-side junction box power receiving socket are plugged in a plugging mode, 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 are respectively connected with 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 the port-side junction box socket XS.
As shown in fig. 5, which shows an example of a safety loop of a ship shore power system 5, the power boxes 1, 2, 3, 4, 5 are simultaneously used for the 5-feedback line shore power boxes.
As shown in fig. 6, 3 power boxes of the port power supply facility feed power to shore power boxes with different feeder numbers simultaneously, namely a1 feedback line safety loop and a2 feedback line safety loop.
In fig. 6, the circuits of 3 electric boxes on the shore side are identical, and the undervoltage trippers of the main circuit breakers of the electric boxes are respectively 11YU, 21YU and 31YU; the safety trip and the movable breaking auxiliary contacts of the main circuit breaker of each power connection box are respectively 1SY, 2SY and 3SY, and are respectively movable broken when the main circuit breaker is in protection trip, and manual reset is needed after the movable breaking; the 3 on-site cut-off buttons of the power receiving boxes 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 1 and 2 in each emergency cut-off interface, after being pressed down, the automatic cut-off buttons are required to be reset manually, and movable cut-off contacts or contacts which are movable in normal time of other protection devices of the shore-side power supply system can be respectively connected in series with the self-locking manual emergency cut-off buttons 11SJ, 21SJ and 31SJ in each emergency cut-off interface. The path of the 1 st electric box safety loop is as follows: one end of a 1 st power box control power source, a 1 st power box on-site cut-off button (11S), a 1 st power box emergency cut-off interface (implemented by taking an emergency cut-off button 11SJ as an example), a control contact P1 of a 1 st power box socket, a control contact P1 of a 1 st shore power cable shore side end plug, a control contact P1 of a 1 st shore power cable ship side end plug, a control contact P1 of a 1 st back socket of a shore power box, a main breaker movable auxiliary contact Q1 of the shore power box, a control contact P2 of a 1 st back socket of the shore power box, a control contact P2 of a 1 st shore power cable shore side end plug, a control contact P2 of a 1 st power box socket, an undervoltage tripper 11YU of a 1 st power box, and the other end of the 1 st power box control power source; the other 2 paths of the safety loops of the power connection boxes are the same as the paths of the safety loops of the other 2 power connection boxes; if the port has n boxes, the paths of the safety loops are all the same.
In the 1 feedback line shore power box safety loop, the undervoltage release of the main circuit breaker of the shore power box is 1YU; the moving auxiliary contact of the main breaker is Q1; the on-site cut-off button is 1S; a self-locking manual emergency cutting button 1SJ is connected between the terminals 1 and 2 in the emergency cutting interface, and the self-locking manual emergency cutting button 1SJ can be connected in series in the emergency cutting interface after being pressed down and needs to be reset manually, and a ship side power receiving system, a cable management system, the emergency cutting buttons at other parts and movable breaking contacts of other protection devices or contacts which are movable in normal time can be connected in series with the self-locking manual emergency cutting button 1 SJ; the path of the 1 feedback line shore power box safety loop is as follows: one end of a shore power box control power supply, a shore power box on-site cut-off button 1S, a shore power box emergency cut-off interface (in the figure, the emergency cut-off button 1SJ is taken as an example for implementation), a control contact P3 of a 1 st back socket of the shore power box, a control contact P3 of a 1 st back socket of the shore power cable, a movable breaking auxiliary contact 1SY for protecting and tripping of a 1 st power box socket, a control contact P4 of a 1 st back socket of the shore power cable, a control contact P4 of a 1 st back socket of the shore power box, an undervoltage tripper 1YU of a main circuit breaker of the shore power box and the other end of the shore power box control power supply.
In the 2 feedback line shore power box safety loop, the coil of the undervoltage tripper of the 2 feedback line shore power box main breaker is 2YU; the movable auxiliary contacts of the main circuit breaker are Q21 and Q22; the on-site cut-off button is 2S; a self-locking manual emergency cutting button 2SJ is connected between the terminals 1 and 2 in the emergency cutting interface, and the emergency cutting button and the movable contact of other protection devices on the ship side power receiving system, the cable management system and other parts or the movable contact in normal time can be connected with the self-locking manual emergency cutting button 2SJ in series in the emergency cutting interface after being pressed; the path of the 2 feedback line shore power box safety loop is as follows: one end of the shore power box control power supply- & gt the on-site cut-off button 2S of the shore power box- & gt the emergency cut-off interface of the shore power box (taking the emergency cut-off button 2SJ as an example in the figure) & gt the control contact P3 of the 1 st shore power box 1 st back socket- & gt the control contact P3 of the 1 st jack socket- & gt the movable breaking auxiliary contact 2SY of the 1 st jack breaker protection trip- & gt the control contact P4 of the 1 st jack socket- & gt the control contact P4 of the 1 st jack plug- & gt the control contact P4 of the 1 st jack 1 st back socket- & gt the control contact P3 of the 2 nd jack 2 nd back socket- & gt the control contact P3 of the 2 nd jack plug of the 2 nd jack socket- & gt the control contact P3 of the 2 nd jack plug. If the feeder line is above the 2 nd loop, the path of the safety loop is the same as the above; if the number of the movable closing control contacts of the main circuit breaker of the shore power box is insufficient, an intermediate relay can be added to expand the movable closing control contacts.
The connector for connecting the shipside shore power box and the shore side connector is of a plug and socket type specified by international standards such as IEC/IEEE 80005-3:2016 and IEC 60309-5:2017; 1 socket is arranged on each power receiving box, 1 socket is arranged on the single feedback line shore power box, and 2 sockets are arranged on the 2 feedback line shore power box; according to the requirements of the international and domestic related specifications and standards that an emergency cut-off signal of a shore power control system is hard-wired, a control line in a special shore power flexible cable is adopted as a control line in the safety loop, 3-core phase lines (L1, L2 and L3), 1-core neutral lines (N), 1-core protection grounding lines (PE), 4-core control lines (P1, P2, P3 and P4) and 2-pair communication lines (H1/H2 and H3/H4) are arranged in the special shore power flexible cable, the cable core line arrangement can be used in an IT or TN grounding mode and meets the requirements of safety, control, communication and the like, and the cable core line arrangement is shown in a figure 7 of the specification; two ends of each shore power cable are respectively provided with a plug which accords with 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 1 shore power cable, and 1 power connection box is connected with the 1 shore power cable; the safety loop of the shore power box of the 2-loop feeder is that 2 shore power cables respectively connect 2 power boxes with 2 sockets on the shore power box.
When the plugs at two ends of the 1 shore power cable are used for plugging the socket of the 1 shore power box and the socket of the shore power box of the 1 feedback line, the under-voltage release coil 1YU of the main circuit breaker of the shore power box with the 1 feedback line is powered on, and after the main circuit breaker of the shore power box is switched on, the moving contact Q1 of the under-voltage release coil 11TU of the main circuit breaker of the 1 shore power box is connected, and the main circuit breaker of the shore power box can be switched on to feed power to the shore power box.
When plugs at two ends of 2 shore power cables are separated, after the socket of 2 power boxes and the socket of a shore power box of a 2-return feeder are plugged, the under-voltage release coil 2YU of the main circuit breaker of the 2-return feeder is powered on, after the main circuit breaker of the shore power box is switched on, the moving contact Q21 of the under-voltage release coil 11TU is connected with the main circuit breaker of 1 power box, the moving contact Q22 of the under-voltage release coil 21TU is connected with the main circuit breaker of another 1 power box, and the main circuit breaker of the 2 power boxes can be switched on to feed the 2-return feeder.
The safety interlock protection principle is as follows:
⑴ 1 feedback line safety protection principle:
① The under-voltage release 11YU of the shore side main circuit breaker is controlled by the auxiliary contact Q1 of the shore side main circuit breaker, so that the power supply side is interlocked by the power receiving side, the two sides of the shore are connected by a shore cable and a connector, the under-voltage release 11YU of the shore side main circuit breaker is in a power-losing state before the connector is not connected and the shore side main circuit breaker is not closed, the shore side main circuit breaker cannot be closed;
② The under-voltage tripping coil 1YU of the ship side shore power box main breaker is controlled by the safety trip movable breaking auxiliary contact 1SY of the shore side power box main breaker, so that the power supply side is interlocked with the power receiving side, the two sides of the ship side are connected by a shore power cable and a connector, and before the connector is not connected, the under-voltage tripping device 1YU of the shore power box main breaker is in a power-losing state, the shore power box main breaker cannot be switched on, and the power box main breaker cannot be switched on;
③ The shore power cable and plugs at two ends of the shore power cable are middle links of double interlocking, and belong to an important component part of double interlocking of a safety loop;
④ The ship side main circuit breaker is subjected to on-site switching-off or fault tripping, so that the shore side connection electric box main circuit breaker can be subjected to voltage-losing tripping at the same time;
⑤ After the on-site cut-off button 1S of the ship side shore power box is pressed or the manual emergency cut-off button 1SJ in the emergency cut-off interface is pressed or any protection action in the emergency cut-off interface is performed, the main circuit breaker of the shore power box can be subjected to voltage-losing tripping, and the main circuit breaker of the shore side power box is subjected to voltage-losing tripping at the same time;
⑥ When the shore side power box main circuit breaker is tripped due to fault safety, the movable breaking auxiliary contact 1SY of the shore side power box main circuit breaker causes the under-voltage tripper 1YU of the ship side shore side power box main circuit breaker to lose power, and the shore side power box main circuit breaker simultaneously loses voltage and trips;
⑦ The on-site cut-off button 11S of the shore-side junction box is pressed, or after the manual emergency cut-off button 11SJ in the emergency cut-off interface is pressed, or any protection action in the emergency cut-off interface can enable the feeder circuit breaker of the junction box to be released in a voltage-losing way;
⑧ In the on-state of shore power, in the process of pulling plugs on any side of the ship shore in a live mode, the main circuit breaker of the ship side shore power box and the main circuit breaker of the shore side power box are simultaneously subjected to under-voltage tripping;
⑨ When the shore power cable and plugs at two ends thereof have short circuit or open circuit faults, the main circuit breaker of the ship side shore power box and the main circuit breaker of the shore side junction box are simultaneously under-voltage tripped.
⑵ 2 Safety protection principle of feedback line:
① The under-voltage trippers of the 2 main circuit breakers of the shore side are respectively 21YU and 31YU, and are respectively controlled by auxiliary contacts Q21 and Q22 of the main circuit breakers of the shore side, so that the interlocking of the power supply side by the power receiving side is realized, the two sides of the shore are connected by a 2-circuit shore power cable and a connector, the under-voltage trippers 21YU and 31YU of the 2 main circuit breakers of the shore side are in a power losing state before the 2-circuit connector is not connected and the main circuit breakers of the shore side are not closed, and the 2 main circuit breakers of the shore side cannot be closed;
② The under-voltage tripping coil 2YU of the ship side shore power box main breaker, the safe trip of the shore side power box main breaker moves the auxiliary contact 2SY and 3SY to connect in series and control, thus realize the interlocking of the power supply side to the power receiving side, the ship side both sides are connected by 2 shore power cables and connectors, before the connector of 2 feeder lines is incomplete to connect, the under-voltage tripper 2YU of the shore power box main breaker is in the power-off state, the shore power box main breaker can't close, 2 power box main breakers can't close either;
③ The shore power cable and plugs at two ends of the shore power cable are middle links of double interlocking, and belong to an important component part of double interlocking of a safety circuit;
④ The shipside main circuit breaker of the shore power box is switched off in situ or tripped by faults, and auxiliary contacts Q21 and Q22 of the main circuit breaker of the shore power box are disconnected, so that 2 main circuit breakers of the shore power box are simultaneously subjected to voltage-losing tripping;
⑤ After the on-site cut-off button 2S of the ship side shore power box is pressed or the manual emergency cut-off button 2SJ in the emergency cut-off interface is pressed or any protection action in the emergency cut-off interface is performed, the main circuit breaker of the shore power box can be subjected to voltage-losing tripping, and the main circuit breaker of the shore side 2 power boxes can be subjected to voltage-losing tripping at the same time;
⑥ When any main breaker of the shore side 2 power boxes is tripped due to fault safety, the movable breaking auxiliary contacts 2SY or 3SY of the main breaker of the shore side 2 power boxes enable the undervoltage tripper 2YU of the main breaker of the shore side power boxes to lose power, and the main breaker of the shore side power boxes is tripped in a voltage losing way;
⑦ After any one of the on-site cut-off buttons 21S and 31S of the 2 electric boxes on the shore side or the manual emergency cut-off button 21SJ or 31SJ in any one of the electric box emergency cut-off interfaces is pressed, or any one of the emergency cut-off interfaces is protected, the feeder circuit breaker of the 2 electric boxes can be released under the voltage loss;
⑧ In the on-state of shore power, in the process of pulling any one side plug of the ship shore 2 feedback line in a live mode, the ship side shore power box main circuit breaker and the shore side 2 main circuit breakers of the power boxes are simultaneously subjected to under-voltage tripping;
⑨ When the shore power cable and plugs at two ends thereof have short circuit or open circuit faults, the main circuit breaker of the ship side shore power box and the main circuit breaker of the shore side 2 power boxes are simultaneously under-voltage tripped.
In summary, compared with the prior art, the invention has the following beneficial effects:
⑴ The multi-feedback line safety loop of the ship shore power system has clear circuit principle, simple structure, compatibility, safety and advancement:
① The port connection box and the shore connection box manufactured by adopting the protection principle and the requirements of the port connection box and the shore connection box on components are favorable for 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 universality, and is not limited by the voltage, frequency and current levels of a low-voltage shore power system as long as the power capacity of the port permits, so that each power connection box has compatibility with shore power boxes with different numbers of returns to meet the requirement that the shipborne shore power boxes with different numbers of feeder lines access shore power;
③ The ship side shore power box can be provided with an i back socket according to the requirements of the ship on shore capacitance, (i=1-n, n=5) so as to meet the requirements of the ship on shore capacitance in the port closing period and ensure that the ship can normally use electricity in the port closing period;
④ As long as the components and the safety protection projects of the existing power supply facilities of the port meet the requirements of the related international and domestic standards, the safety loop is adopted to make technical changes, the structures of the power connection box and the shore power box are not required to be changed, the components are not required to be additionally arranged, the technical requirements of the invention are met, 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 related international and domestic standards, can be ensured to be continuously effective;
(2) The multi-feedback line safety circuit of the ship shore power system is safe and reliable in electrical principle, various functions completely meet various safety regulations of international and domestic related specifications and standards on power supply facilities and power receiving facilities of the ship low-voltage shore power system, the defect of the IEC80005-3:2016 standard in a safety control schematic diagram of a multi-feedback line of the shore power system is effectively overcome, the technical requirements of the IEC80005-3:2016 standard and related specifications and standards on the ship shore power system can be met, popularization and use of shore power are facilitated, and the technical aspects are that:
① Only after the plugs at the two ends of the 1-n shore power returning cables at the two sides of the ship shore are respectively connected with the shore power box and the socket of the electricity receiving box, and the circuit breakers of the shore power box are switched on, the circuit breakers of the 1-n shore power receiving boxes at the harbor are switched on conditionally, and the interlocking ensures that the plugs at the two ends of each cable are not connected in an electrified manner;
② In the process of pulling out plugs at any one end of any feeder line of the shore-back power connection cable at the two sides of the ship by mistake, all the circuit breakers at the two sides of the 1-n feeder lines are automatically tripped, and the interlocking ensures that the plugs at the two ends of each feeder line are not pulled out in an electrified manner;
③ Any main breaker of 1-n power boxes trips, and the main breakers of the shore power boxes also lose voltage and trip at the same time;
④ 1-n feedback line shore power boxes are manually opened or tripped by faults, and all the breakers of 1-n power boxes are simultaneously subjected to voltage loss and tripped;
⑤ Any shore power cable of the 1-n feedback lines has short circuit or open circuit fault, and the circuit breakers of the 1-n power connection boxes and the circuit breakers of the 1-n shore power return boxes are tripped at the same time when all the power connection boxes are closed, and the power connection boxes cannot be closed when the power connection boxes are not closed, so that the 1-n power supply cables are protected;
⑥ When 1 to n power connection boxes on the shore side feed power to a single feeder shore power box of 1 to n ships respectively, any position on the shore side or the ship side is manually and emergently cut off or any protection function in other protection acts, only the circuit breakers on the two sides of the shore of the feeder ship are cut off, and the power supply for other ships to be connected with the shore is not influenced;
⑦ When 1-n power boxes on the shore side are used for feeding power to the shore power boxes of 1-n feeder lines, any position on the shore side or the ship side is manually and emergently cut off or any protection automatic action of other protection functions is performed, and a breaker of the 1-n power boxes on the shore side and a breaker of the shore power boxes of 1-n feeder lines on the ship are tripped at the same time;
⑧ When the main breaker of the ship shore side connection box trips due to faults, the breaker needs to be manually reset after the auxiliary contacts are manually reset, and the breaker can be switched on again; when the self-locking manual emergency cut-off button at any position on the shore side or the ship side is pressed, the manual reset is needed, and then the switch-on can be performed again.
(3) The invention relates to a multi-feedback line safety loop of a ship shore power system, wherein each power receiving box at the shore side is provided with an emergency cut-off interface, and a movable cut-off contact (comprising a contact which is movable in normal time) of other protection devices of the shore side power system is connected in series with an emergency cut-off button so as to ensure that other protection functions of the shore side power system, which are arranged according to the standard requirements, are continuously effective; the ship side shore power box is provided with an emergency cut-off interface, and movable cut-off contacts (including contacts which are movable in normal time) of other protection devices (such as equipotential protection, cable management system protection and related protection of a power receiving system) of the ship side power receiving system are connected in series with an emergency cut-off button so as to ensure that other protection functions of the ship side power receiving system, which are arranged according to the requirements of standard standards, are continuously effective; meanwhile, the protection function is increased newly. If the shore side or the ship side needs to acquire the signal of the operation state of the main circuit breaker of the power connection box or the shore power box, the opening/closing auxiliary contact of the opening/closing of the circuit breaker can be utilized to provide the switching value for alarming or controlling.
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. The utility model provides a boats and ships shore power system multi-feedback line safety return circuit which characterized in that, shore power supply unit sets up n shore power connection boxes, and each shore power connection box is independent, does not have the control line connection each other, and every shore power connection box all disposes: the circuit breaker QF, the socket XS, the on-site stop button 1S of the power connection box and the shore-side emergency cut-off button 1SJ are in accordance with IEC60309-5-2017 standard, and the circuit breaker QF accessory comprises 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, wherein the circuit breaker QF accessory is provided with a fault tripping signal control contact SY and an under-voltage tripping coil 1YU; the shipside shore power box comprises a breaker Q, a shore power box on-site stop button S, a shipside emergency cut-off button SJ and a shore power box power receiving socket XSi, i=1-n; each shore power box power socket 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 circuit breaker Q accessory is provided with an undervoltage coil YU and n movable closing control contacts; one end of a shore-side power connection box control power supply is connected with one end of an undervoltage tripping coil 1YU of a breaker QF, the other end of the undervoltage tripping coil 1YU is connected with a control contact P2 of a socket XS, the control contact P1 of the socket XS is connected with one end of a shore-side emergency cut-off button 1SJ in series and then is connected with one end of a power connection box on-site stop button 1S, 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 tripping signal contact SY is connected with a control contact P3 of the socket XS, and the other end of the breaker QF fault tripping signal contact SY is connected with a control contact P4 of the socket XS; the control contact P1 of each 1-side emergency cut-off button Sj is connected with one end of a movable control contact of the shore power box breaker Q, the other end of the movable control contact is connected with the control contact P2 of the shore power box power receiving socket, one end of a shore power box on-site stop button S is connected with one end of a shore power box control power supply, the other end of the shore power box on-site 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 the control contact P3 of the 1-side shore power box power receiving socket XS1, one end of an under-voltage trip coil YU of the breaker Q is connected with the other end of the shore power box control power supply, the other end of the under-voltage trip coil YU is connected with the control contact P4 of the n-side emergency cut-off button Sj power box power receiving socket XSn, the control contact P4 of the i-th shore power returning box power receiving socket XSi is connected with the control contact P3 of the i+1-th shore power returning box power receiving socket XSi+1, wherein i=1-n-1; each feedback electric line is connected with a corresponding shore-side junction box through a shore power cable, the shore power cable comprises an N wire core, an L1 wire core, an L2 wire core, an L3 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 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, and a main contact N, a main contact L1 of a ship-side shore-side junction box power receiving socket are plugged in a plugging mode, 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 are respectively connected with 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 the port side junction box socket XS;
The method comprises the steps that each power receiving box on the shore side is provided with a power receiving box emergency cut-off interface, the power receiving box emergency cut-off interface is arranged between an auxiliary contact P1 of a power receiving box socket XS on the shore side and a power receiving box on-site stop button 1S, movable cut-off contacts of other protection devices of a shore side power supply system and movable contact points in normal time are connected with a shore side emergency cut-off button 1SJ in series, and a series circuit is connected between a terminal 1 and a terminal 2 of the power receiving box emergency cut-off interface so as to ensure that protection functions of the shore side power supply system, which are set according to standard requirements, are continuously effective;
The shore power box on the ship side is provided with a shore power box emergency cut-off interface, the shore power box emergency cut-off interface is arranged between a local stop button S of the shore power box and a control contact P3 of a power receiving socket XS1 of the 1 st shore power box, the movable contact of other protection devices of the power receiving system on the ship side and the movable contact in normal are connected in series with the ship side emergency cut-off button SJ, and the series circuit is connected between a terminal 1 and a terminal 2 of the shore power box emergency cut-off interface so as to ensure that the protection function of the power receiving system on the ship side, which is arranged according to the standard requirement, is continuously effective.
CN202010263276.4A 2020-04-07 2020-04-07 Multi-feedback line safety loop of ship shore power system Active CN111342468B (en)

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CN112736993A (en) * 2020-12-29 2021-04-30 卧龙电气集团辽宁荣信电气传动有限公司 Distributed series power supply method for shore power system
CN112701792B (en) * 2020-12-30 2024-06-11 江苏玺骅电器有限公司 Multifunctional low-voltage high-capacity shore power connection box circuit for port

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WO2017088989A1 (en) * 2015-11-27 2017-06-01 NSB Niederelbe Schiffahrtsgesellschaft mbH & Co. KG Device for supplying the electrical system of a ship with shore power
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