CN205231838U - Boats and ships bank electricity automatic switching device - Google Patents

Abstract

The utility model discloses an automatic shore power conversion device for ships, which comprises a first circuit breaker Q1, a second circuit breaker Q2, a shore power breaker switch 1Q, a phase sequence automatic converter, a first closing button 1SB, a second closing Button 2SB, opening button 3SB. Two circuit breakers Q1 and Q2 with different wiring phase sequences, when there is power on the incoming line side, the phase sequence automatic converter can make the shore power circuit breaker 1Q on the main switchboard switch automatically regardless of whether Q1 or Q2 is selected to close. Closing supplies power to the main busbar. Between Q1 and Q2 in the shore power box, between the main circuit breakers DG1 to DGn of each generator including the emergency generator main circuit breaker EQ, and the shore power circuit breaker 1Q, interlocking is implemented to prevent false closing . The utility model realizes the instantaneous automatic conversion of the ship's main switchboard to be powered by shore power, which is beneficial to the continuous operation of the ship's electrical equipment and ensures reliable and timely power supply to the ship's electrical equipment.

Description

Ship shore power automatic conversion device

technical field

The utility model relates to a ship shore power supply system, in particular to a ship shore power automatic conversion device, which belongs to the technical field of ship electrical equipment.

Background technique

When the ship is out of service at the port, the shore power supply can be used for power supply, which can reduce the pollution caused by the ship to the environment.

The installation position of the shore power box in the prior art is above the main deck of the ship, and the installation position of the main switchboard is inside the engine room of the ship. The distance between the shore power box and the main switchboard on the ship ranges from tens of meters to hundreds of meters. meters, the larger the ship, the farther the distance between the shore power box and the main switchboard is, and the existing shore power and ship power switching technology is very inconvenient to operate. When the conventional shore power box is used to supply power to the main switchboard, it is not only inconvenient to operate, but also takes a long time to convert ship power to shore power, which often affects the normal operation of ship electrical equipment.

Therefore, it is important to develop a ship shore power automatic conversion device to realize the instantaneous automatic conversion of the ship's main switchboard to the shore power supply, which is conducive to the continuous work of the ship's electrical equipment and meets the technical requirements of the ship's unmanned cabin. practical application value.

Utility model content

The purpose of the utility model is to provide an automatic switch device for ship shore power, which realizes the automatic instantaneous switch between ship power and shore power, and ensures reliable and timely power supply to ship electrical equipment.

The purpose of this utility model is achieved through the following technical solutions:

A shore power automatic conversion device for ships, including a first circuit breaker Q1, a second circuit breaker Q2, a shore power circuit breaker 1Q, a phase sequence automatic converter 1, a first switch-on button 1SB, a second switch-on button 2SB, a switch Brake button 3SB; the phase-sequence automatic converter 1 includes an intermediate relay K1, an intermediate relay K2, and a phase-sequence relay KA, and the normally open contact of the intermediate relay K1 is connected to the incoming line terminal U of the phase-sequence automatic converter 1 and Between the No. 1 outgoing line terminal, the normally open contact of the intermediate relay K2 is connected between the incoming line terminal V of the phase-sequence automatic converter 1 and the No. 2 outgoing line terminal, and the incoming line terminal W of the phase-sequence automatic converter 1 and the No. 3 outlets are connected. The coils of the intermediate relay K1 and K2 are controlled by the phase sequence relay KA. When the phase sequence relay KA detects that the phase sequence is positive, the coil of the intermediate relay K1 is energized. Closed, when the phase sequence relay KA detects that the phase sequence is reverse phase sequence, the coil of the intermediate relay K2 is energized, and its normally open contact is closed;

The main contact inlet terminals of the first circuit breaker Q1 and the second circuit breaker Q2 are connected to the three-phase power supply of the shore power at the same time, and the main contact outlet terminals of the first circuit breaker Q1 are connected to the main contact inlet of the shore power circuit breaker 1Q. The outlet terminal of the main contact of the shore power circuit breaker 1Q is connected to the busbar of the main switchboard, and the outlet terminal of the second circuit breaker Q2 is connected to the shore power circuit breaker in the opposite phase sequence to that of the first circuit breaker Q1. The main contact of 1Q is connected to the incoming line end; the U, V, and W terminals of the phase sequence automatic converter 1 are connected to the shore power three-phase power supply, and the normally open contact of the first closing button 1SB is connected to the first circuit breaker Q1 After the normally open auxiliary contact of the second circuit breaker Q2 is connected in parallel, the normally closed auxiliary contact of the second circuit breaker Q2 and the closing coil of the first circuit breaker Q1 are connected in series, and one end of the series circuit is connected to the No. 1 output terminal of the phase sequence automatic converter 1 , the other end of the series circuit is connected to one end of the normally closed contact of the opening button 3SB; the normally open contact of the second closing button 2SB is connected in parallel with the normally open auxiliary contact of the second circuit breaker Q2 and then sequentially connected with the first circuit breaker The normally closed auxiliary contact of Q1 and the closing coil of the second circuit breaker Q2 are connected in series, one end of the series circuit is connected to the No. One end; the other end of the normally closed contact of the opening button 3SB is connected to the No. 3 output end of the phase sequence automatic converter;

A pair of normally open contacts of the first circuit breaker Q1 are connected in parallel with a pair of normally open contacts of the second circuit breaker Q2 and a pair of normally open contacts of the shore power disconnect switch 1Q, and one end of the parallel circuit is connected to the shore power One phase of the main contact input end of the circuit breaker 1Q, the other end of the parallel circuit is connected in series with the closing coil of the shore power circuit breaker 1Q and the normally closed auxiliary contacts of the main circuit breakers of each generator, and then connected to the shore power circuit breaker 1Q The other phase of the incoming line end of the main contact; the closing circuits of the main circuit breakers of the generators are respectively connected in series with a pair of normally closed auxiliary contacts of the shore power disconnecting switch 1Q.

The purpose of this utility model can also be further realized through the following technical measures:

The above-mentioned ship shore power automatic transfer device also includes a measurement and metering circuit, and the measurement and metering circuit is arranged at the main contact inlet end of the first circuit breaker Q1.

The above-mentioned ship shore power automatic conversion device, the phase sequence relay KA inside the phase sequence automatic converter 1 is of the type JL-420, and the U, V and W terminals of the phase sequence relay KA are connected to the shore power three-phase power supply, and the phase sequence The normally closed contacts of the 11th and 12th terminals of the relay KA are connected in series with the coil of the intermediate relay K1. The coils of the relay K2 are connected in series, and the two ends of the series circuit are connected to the working power supply.

Compared with the prior art, the beneficial effect of the utility model is that: the utility model realizes the instantaneous automatic conversion of the main switchboard of the ship to be powered by the shore power, which is beneficial to the continuous operation of the ship's electrical equipment and ensures the power supply to the ship's electrical equipment. Reliable and timely power supply.

Description of drawings

Fig. 1 is a schematic circuit diagram of the utility model;

Figure 2 is the wiring diagram of the phase sequence relay;

Figure 3 is the internal circuit diagram of the phase sequence automatic converter.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.

As shown in Figure 1, a ship shore power automatic transfer device includes a first circuit breaker Q1, a second circuit breaker Q2, a shore power disconnect switch 1Q, a phase sequence automatic converter 1, a first closing button 1SB, a second Closing button 2SB, opening button 3SB. The device also includes a measurement and metering circuit, which is arranged at the main contact inlet end of the first circuit breaker Q1 to measure and measure shore power parameters.

The phase sequence automatic converter 1 is mainly composed of intermediate relays K1, K2 and a phase sequence relay KA. The phase sequence relay KA can be a JL-420 phase sequence relay, or similar products of traditional models, such as XJ2, XJ3, etc. The JL-420 phase sequence relay is shown in Figure 2. As shown in Figure 3, the U, V, and W terminals of the phase sequence relay KA are connected to the shore power three-phase power supply, and the normally closed contacts of the 11th and 12th terminals of the phase sequence relay KA are connected in series with the coil of the intermediate relay K1, and then Both ends of the circuit are connected to the working power supply. After the normally closed contacts of the No. 11 and No. 14 terminals of the phase sequence relay KA are connected in series with the coil of the intermediate relay K2, the two ends of the series circuit are connected to the working power supply. The coils of the intermediate relays K1 and K2 are controlled by the contacts of the phase sequence relay KA. When the phase sequence relay KA detects that the phase sequence is positive, the intermediate relay K1 coil is energized, and its normally open contact is closed. When the phase sequence relay KA detects that the phase sequence is reverse, the intermediate relay K2 coil is energized, and its normally open contact closure.

The main contact inlet terminals of the first circuit breaker Q1 and the second circuit breaker Q2 are connected to the three-phase power supply of the shore power at the same time, and the main contact outlet terminals of the first circuit breaker Q1 are connected to the main contact inlet of the shore power circuit breaker 1Q. The outlet terminal of the main contact of the shore power circuit breaker 1Q is connected to the busbar of the main switchboard, and the outlet terminal of the second circuit breaker Q2 is connected to the shore power circuit breaker in the opposite phase sequence to that of the first circuit breaker Q1. The main contact of 1Q is connected to the incoming line end; the U, V, and W terminals of the phase sequence automatic converter 1 are connected to the shore power three-phase power supply, and the normally open contact of the first closing button 1SB is connected to the first circuit breaker Q1 After the normally open auxiliary contact of the second circuit breaker Q2 is connected in parallel, the normally closed auxiliary contact of the second circuit breaker Q2 and the closing coil of the first circuit breaker Q1 are connected in series, and one end of the series circuit is connected to the No. 1 output terminal of the phase sequence automatic converter 1 , the other end of the series circuit is connected to one end of the normally closed contact of the opening button 3SB.

The normally open contact of the second closing button 2SB is connected in parallel with the normally open auxiliary contact of the second circuit breaker Q2, and then sequentially connected with the normally closed auxiliary contact of the first circuit breaker Q1 and the closing coil of the second circuit breaker Q2. connected in series, one end of the series circuit is connected to the No. 2 output terminal of the phase sequence automatic converter, the other end of the series circuit is connected to one end of the normally closed contact of the opening button 3SB; the other end of the normally closed contact of the opening button 3SB is connected to the phase No. 3 output terminal of the sequential automatic changer.

A pair of normally open contacts of the first circuit breaker Q1 are connected in parallel with a pair of normally open contacts of the second circuit breaker Q2 and a pair of normally open contacts of the shore power disconnect switch 1Q, and one end of the parallel circuit is connected to the shore power One phase of the main contact input end of the circuit breaker 1Q, the other end of the parallel circuit is connected in series with the closing coil of the shore power circuit breaker 1Q and the normally closed auxiliary contacts of the main circuit breakers of each generator, and then connected to the shore power circuit breaker 1Q The other phase of the incoming line end of the main contact; the closing circuits of the main circuit breakers of the generators are respectively connected in series with a pair of normally closed auxiliary contacts of the shore power disconnecting switch 1Q.

In order to meet the requirements of ship regulations and facilitate operation, this device can also set an indicator light HL2 in the shore power automatic transfer box 2 circuit, which is connected between the two phases of the outlet terminal of the first circuit breaker Q1, as a closing indication of the main switch of the shore power box ; An indicator light 1HL is set on the main switchboard 3, which is used to indicate that the shore power has been sent to the incoming line side of the shore power disconnect switch 1Q of the main switchboard 3. The device can also be provided with an indicator light 2HL on the main switchboard 3, and connected in parallel to both ends of the coil of the shore power disconnect switch 1Q through the normally open auxiliary contact of the shore power disconnect switch 1Q, as the closing switch of the shore power disconnect switch 1Q instruct. The device can also be provided with buttons 21SB and 22SB as the manual closing and opening buttons of the shore power circuit breaker 1Q.

The working principle and process of the utility model are as follows: two electric circuit breakers Q1 and Q2 with different wiring phase sequences, when there is electricity on the incoming line side, the phase sequence automatic converter 1 can switch on whether Q1 or Q2 is selected. The shore power disconnect switch 1Q on the main switchboard 3 is automatically closed to supply power to the main busbar. Between Q1 and Q2 in the shore power box, between the main circuit breakers DG1 to DGn of each generator including the emergency generator main circuit breaker EQ, and the shore power circuit breaker 1Q, interlocking is implemented to prevent false closing .

According to the ship's requirements for power supply devices, the automatic conversion between the shore power and the ship power is a self-switching and non-self-recovery mode. After power generation, the ship's power supply will not automatically resume power supply to the main switchboard; when using micro-processing technology, it can be connected to the PMS (ship energy management system), cut off the shore power according to the set procedure, and automatically restore the power distribution from the ship's power to the main switchboard board power supply.

When the shore power has been connected to the shore power automatic conversion box 2, there are two situations for the shore power to be automatically put into use. One is that the main circuit breakers of each ship generator have all been opened, as shown in the normal state of DG1 to EQ in Figure 1. The closed auxiliary contacts are already in the connected state. When the Q1 or Q2 selected by the phase sequence automatic converter 1 is connected, the shore power disconnect switch 1Q on the main switchboard is also automatically closed to supply power to the main busbar; One is that the shore power automatic transfer box 2 first sends the shore power to the incoming side of the shore power breaker switch 1Q on the main switchboard. After the last generator circuit breaker supplying power to the main switchboard is opened, the shore power breaker 1Q is automatically closed to supply power to the main switchboard. In the above two cases, as long as the simple operation is performed, the automatic shore power input can be realized. In the latter case, the shore power automatic input can realize the instantaneous conversion between ship power and shore power.

The closing circuits of the main circuit breakers of each generator are respectively connected in series with a pair of normally closed auxiliary contacts of the shore power disconnect switch 1Q. When the shore power supplies power to the main busbar through the shore power disconnect switch 1Q, the The control circuit of the main circuit breaker has been cut off by the 1Q moving contact of the shore power circuit breaker and cannot be closed. Only after the shore power circuit breaker 1Q is opened can the main circuit breakers of each generator meet the conditions for closing; When the main circuit breaker of one or any generator is in the closed state to supply power to the main busbar, the 1Q control circuit of the shore power circuit breaker is cut off and cannot be closed. When the switch is in the switch position, the shore power circuit breaker 1Q has the condition to switch on. Therefore, there is no possibility of false closing.

In addition to the above-mentioned embodiments, the utility model can also have other implementation modes, and all technical solutions formed by equivalent replacement or equivalent transformation all fall within the scope of protection required by the utility model.

Claims (3)

1. A shore power automatic transfer device for ships, characterized in that it includes a first circuit breaker Q1, a second circuit breaker Q2, a shore power disconnect switch 1Q, a phase sequence automatic converter (1), a first closing button 1SB, The second closing button 2SB, opening button 3SB; the phase sequence automatic switch (1) includes an intermediate relay K1, an intermediate relay K2, and a phase sequence relay KA, and the normally open contact of the intermediate relay K1 is connected to the phase sequence Between the incoming terminal U of the automatic converter (1) and the No. 1 outgoing terminal, the normally open contact of the intermediate relay K2 is connected between the incoming terminal V of the phase-sequence automatic converter (1) and the No. 2 outgoing terminal, The incoming line terminal W of the phase-sequence automatic converter (1) is connected to the No. 3 outgoing line terminal, and the coils of the intermediate relay K1 and the intermediate relay K2 are controlled by the phase-sequence relay KA, and the phase-sequence relay KA detects that the phase sequence is When the phase sequence is positive, the intermediate relay K1 coil is energized, and its normally open contact is closed. When the phase sequence relay KA detects that the phase sequence is reverse phase sequence, the intermediate relay K2 coil is energized, and its normally open contact is closed; The main contact inlet terminals of the first circuit breaker Q1 and the second circuit breaker Q2 are connected to the three-phase power supply of the shore power at the same time, and the main contact outlet terminals of the first circuit breaker Q1 are connected to the main contact inlet of the shore power circuit breaker 1Q. The outlet terminal of the main contact of the shore power circuit breaker 1Q is connected to the busbar of the main switchboard, and the outlet terminal of the second circuit breaker Q2 is connected to the shore power circuit breaker in the opposite phase sequence to that of the first circuit breaker Q1. The main contact of 1Q is connected to the incoming line end; the U, V, and W terminals of the phase sequence automatic converter (1) are connected to the shore power three-phase power supply, and the normally open contact of the first closing button 1SB is connected to the first open circuit The normally open auxiliary contact of the circuit breaker Q1 is connected in parallel with the normally closed auxiliary contact of the second circuit breaker Q2 and the closing coil of the first circuit breaker Q1 in series, and one end of the series circuit is connected to the phase sequence automatic converter (1) No. 1 output terminal, the other end of the series circuit is connected to one end of the normally closed contact of the opening button 3SB; The normally closed auxiliary contact of the first circuit breaker Q1 and the closing coil of the second circuit breaker Q2 are connected in series, one end of the series circuit is connected to the No. 2 output terminal of the phase sequence automatic converter, and the other end of the series circuit is connected to the opening button 3SB One end of the closed contact; the other end of the normally closed contact of the opening button 3SB is connected to the No. 3 output terminal of the phase sequence automatic converter; A pair of normally open contacts of the first circuit breaker Q1 are connected in parallel with a pair of normally open contacts of the second circuit breaker Q2 and a pair of normally open contacts of the shore power disconnect switch 1Q, and one end of the parallel circuit is connected to the shore power One phase of the main contact input end of the circuit breaker 1Q, the other end of the parallel circuit is connected in series with the closing coil of the shore power circuit breaker 1Q and the normally closed auxiliary contacts of the main circuit breakers of each generator, and then connected to the shore power circuit breaker 1Q The other phase of the incoming line end of the main contact; the closing circuits of the main circuit breakers of the generators are respectively connected in series with a pair of normally closed auxiliary contacts of the shore power disconnecting switch 1Q. 2 . The ship shore power automatic transfer device according to claim 1 , further comprising a measurement and measurement circuit, the measurement and measurement circuit being arranged at the main contact inlet end of the first circuit breaker Q1 . 3. The ship shore power automatic conversion device according to claim 1, characterized in that, the phase sequence relay KA inside the phase sequence automatic converter (1) is of the type JL-420, and the phase sequence relay KA Terminals U, V, and W are connected to the shore power three-phase power supply, the normally closed contacts of the 11th and 12th terminals of the phase sequence relay KA are connected in series with the coil of the intermediate relay K1, the two ends of the series circuit are connected to the working power supply, and the phase sequence relay KA's The normally closed contacts of terminals 11 and 14 are connected in series with the coil of the intermediate relay K2, and the two ends of the series circuit are connected to the working power supply.