Power supply switching circuit suitable for dynamic positioning ship

Abstract

The utility model belongs to the technical field of power supply and distribution, and particularly discloses a power supply switching circuit suitable for a dynamic positioning ship, which comprises a power supply I, a power supply II, a 1KM relay, a 2KM relay, a 1DX potentiometer, a 2DX potentiometer, a KA2 relay, a KT3 delay relay, a KA11 relay, a KA12 relay, an XR4 switch and the like. Under a non-dynamic positioning working condition, power supplies are automatically switched, the main power supply supplies power, and when the main power supply fails, the standby power supply is automatically switched to supply power. Under a dynamic positioning working condition, a power supply automatic switching function is inhibited, a main power supply supplies power, and when the main power supply breaks down, power supply is lost. And when the dynamic positioning working condition is quitted and converted into the non-dynamic positioning working condition, the power supply automatic switching function is recovered, the standby power supply supplies power, and after the fault of the main power supply is eliminated, the main power supply is automatically switched to supply power.

Description

Technical Field

[0001] This utility model relates to the field of power supply and distribution technology, and in particular to a power switching circuit suitable for dynamically positioned ships. Background Technology

[0002] For vessels with dynamic positioning capabilities, when a dynamic positioning rating of DP-2 or higher is achieved, the vessel must maintain its dynamic positioning capability even in the event of a single point of failure. Achieving dynamic positioning relies on the coordination of the propellers; that is, even if a certain number of propellers fail, the remaining propellers can still ensure the vessel's dynamic positioning capability. Based on the proportion of potentially lost propellers relative to all propellers, the vessel's power supply system is divided into multiple redundant groups. If any redundant power supply group loses power due to a fault, the other redundant power supply groups must continue operating. Therefore, each redundant power supply group must operate independently to prevent the fault from spreading between different redundant power supply groups.

[0003] For powering critical loads such as propellers and rudder units, an automatic switching system between main power and emergency power is often used. When the main power is lost, it automatically switches to emergency power, improving equipment reliability and safety. Current patents largely follow this principle, proposing various automatic power switching schemes. However, because the main power and emergency power often belong to different power redundancy groups, automatic power switching is not possible under dynamic positioning conditions, creating a contradiction. To resolve this contradiction, many designs abandon automatic power switching systems and opt for manual power switching systems. In non-dynamic positioning conditions, manual power switching occurs when the main power fails; in dynamic positioning conditions, power switching is not performed. This increases the user's operational difficulty and reduces the success rate of power switching. Utility Model Content

[0004] The purpose of this invention is to solve the technical problems existing in the background art. To this end, a power switching circuit suitable for dynamically positioned ships is provided.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A power switching circuit suitable for dynamically positioned ships, characterized in that it includes a power supply one, a power supply two, a 1KM relay, a 2KM relay, a 1DX potentiometer, a 2DX potentiometer, a KA2 relay, a KT3 time delay relay, a KA11 relay, and a KA12 relay.

[0007] The three phases of the power supply one are electrically connected to the load circuit through the normally open contacts of the 1KM relay, and the three phases of the power supply two are electrically connected to the load circuit through the normally open contacts of the 2KM relay.

[0008] The three phases of the power supply are electrically connected to the three-phase terminals of the 1DX potentiometer, and the three phases of the power supply are electrically connected to the three-phase terminals of the 2DX potentiometer.

[0009] The coil of the KA2 relay is electrically connected between the first phase terminal and the third phase terminal of the 1DX potentiometer.

[0010] The normally open switch contact of the 1DX potentiometer, the normally closed contact of the 2KM relay, the normally open contact of the KT3 time delay relay, and the coil of the 1KM relay are sequentially electrically connected between the first phase terminal and the third phase terminal of the 1DX potentiometer.

[0011] The coil of the KT3 time delay relay is electrically connected between the first phase terminal and the third phase terminal of the 1DX potentiometer.

[0012] The normally open switch contact of the 2DX potentiometer, the normally closed contact of the 1KM relay, the normally closed contact of the KA2 relay, the normally closed contact of the KA11 relay, the normally closed contact of the KA12 relay, and the coil of the 2KM relay are sequentially electrically connected between the first phase terminal and the third phase terminal of the 2DX potentiometer.

[0013] The following is a further technical solution of this utility model, which also includes an XR4 switch, wherein the first phase terminal and the third phase terminal of the 1DX potentiometer are sequentially electrically connected to the switch contact of the XR4 switch and the coil of the KA12 relay.

[0014] The following is a further technical solution of this utility model: the first phase terminal and the third phase terminal of the 2DX potentiometer are electrically connected in sequence to the two contacts of the XR4 switch and the coil of the KA11 relay.

[0015] The following is a further defined technical solution of this utility model: the three-phase power supply of the first power supply is electrically connected to the three-phase terminals of the 1DX potentiometer via fuses FU1, FU2, and FU3 respectively.

[0016] The following is a further technical solution of this utility model: an indicator light is electrically connected between the first phase terminal and the second phase terminal of the 1DX potentiometer, and a voltmeter is electrically connected between the second phase terminal and the third phase terminal of the 1DX potentiometer.

[0017] The following is a further technical solution of this utility model: the three-phase power supply of the second power supply is electrically connected to the three-phase terminals of the 2DX potentiometer via fuses FU4, FU5, and FU6 respectively.

[0018] The following is a further technical solution of this utility model: an indicator light is electrically connected between the first phase terminal and the second phase terminal of the 2DX potentiometer, and a voltmeter is electrically connected between the second phase terminal and the third phase terminal of the 2DX potentiometer.

[0019] The following is a further defined technical solution of this utility model: the load circuit includes a switch Q, a load circuit one, and a load circuit two, and the load circuit one and the load circuit two are electrically connected to the switch Q respectively.

[0020] The following is a further defined technical solution of this utility model: the load circuit includes a load, a thermal relay FR, and a normally open contact of a 1KM relay. The switch Q is electrically connected to the load through the normally open contact of the 1KM relay and the thermal relay FR.

[0021] The following is a further defined technical solution of this utility model: the second load circuit includes a second load, a thermal relay FR, and a normally open contact of a 2KM relay. The switch Q is electrically connected to the second load through the normally open contact of the 2KM relay and the thermal relay FR.

[0022] Compared with the prior art, the present invention has the following technical effects:

[0023] In non-powered positioning mode, automatic power switching occurs, with power supplied by the main power source. If the main power source fails, automatic switching to the backup power source occurs. In powered positioning mode, automatic power switching is disabled, and power is supplied by the main power source. If the main power source fails, power is lost. When exiting powered positioning mode and transitioning to non-powered positioning mode, automatic power switching resumes, with power supplied by the backup power source. Once the main power source failure is resolved, automatic switching back to the main power source occurs.

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a circuit connection diagram of this utility model.

[0027] Reference numerals in the attached diagram: 1. 1DX potentiometer; 2. KA2 relay coil; 3. 1KM relay coil; 4. KT3 time delay relay coil; 5. KA12 relay coil; 6. 2DX potentiometer; 7. 2KM relay coil; 8. KA11 relay coil; 9. XR4 switch; 10. Power supply one; 11. Power supply two. Detailed Implementation

[0028] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0029] like Figure 1 As shown, this embodiment provides a power switching circuit suitable for dynamically positioned ships, which consists of power supply 10 (power supply 10 as the main power supply), power supply 11 (power supply 11 as the backup power supply), 1KM relay, 2KM relay, 1DX potentiometer 1, 2DX potentiometer 6, KA2 relay, KT3 time delay relay, KA11 relay, KA12 relay and XR4 switch 9.

[0030] The three phases of power supply 10 are electrically connected to the load circuit through the normally open contacts of relay 1KM, and the three phases of power supply 21 are electrically connected to the load circuit through the normally open contacts of relay 2KM. The three phases of power supply 10 are electrically connected to the three phase terminals of potentiometer 1DX, and the three phases of power supply 21 are electrically connected to the three phase terminals of potentiometer 62DX.

[0031] The coil 2 of the KA2 relay is electrically connected between the first and third phase terminals of the 1DX potentiometer 1. The normally open switch contact of the 1DX potentiometer 1, the normally closed contact of the 2KM relay, the normally open contact of the KT3 time delay relay, and the coil 3 of the 1KM relay are sequentially electrically connected between the first and third phase terminals of the 1DX potentiometer 1. The coil 4 of the KT3 time delay relay is also electrically connected between the first and third phase terminals of the 1DX potentiometer 1.

[0032] The normally open switch contact of the 2DX potentiometer 6, the normally closed contact of the 1KM relay, the normally closed contact of the KA2 relay, the normally closed contact of the KA11 relay, the normally closed contact of the KA12 relay, and the coil 7 of the 2KM relay are electrically connected sequentially between the first phase terminal and the third phase terminal.

[0033] The first and third phase terminals of potentiometer 1DX are electrically connected in sequence to the first contact of switch 9 of XR4 and the coil 5 of relay KA12. The first and third phase terminals of potentiometer 2DX are electrically connected in sequence to the second contact of switch 9 of XR4 and the coil 8 of relay KA11.

[0034] Fuse FU1, fuse FU2, and fuse FU3 are electrically connected between the three-phase power supply 10 and the three-phase terminals of 1DX potentiometer 1, respectively. An indicator light is electrically connected between the first and second phase terminals of 1DX potentiometer 1, and a voltmeter is electrically connected between the second and third phase terminals of 1DX potentiometer 1.

[0035] Fuse FU4, fuse FU5, and fuse FU6 are electrically connected between the three-phase power supply 11 and the three-phase terminals of 2DX potentiometer 6, respectively. An indicator light is electrically connected between the first and second phase terminals of 2DX potentiometer 6, and a voltmeter is electrically connected between the second and third phase terminals of 2DX potentiometer 6.

[0036] The load circuit includes switch Q, load circuit one, and load circuit two, which are electrically connected to switch Q. Load circuit one includes load one, thermal relay FR, and the normally open contact of 1KM relay. Switch Q is electrically connected to load one through the normally open contact of 1KM relay and thermal relay FR. Load circuit two includes load two, thermal relay FR, and the normally open contact of 2KM relay. Switch Q is electrically connected to load two through the normally open contact of 2KM relay and thermal relay FR.

[0037] The working process of this utility model will be further described below:

[0038] In non-powered positioning mode, both Power Supply 10 and Power Supply 21 are connected. Potentiometer 1 (1DX), Potentiometer 6 (2DX), coil 4 of time delay relay 3 (KT3), coil 2 of relay KA2, and coil 3 of relay 1KM are energized, while coil 7 of relay 2KM is de-energized. The load is powered by Power Supply 10. When a fault occurs in Power Supply 10, Potentiometer 1 (1DX), coil 4 of time delay relay 3 (KT3), coil 2 of relay KA2, and coil 3 of relay 1KM are de-energized, while Potentiometer 6 (2DX) and coil 7 of relay 2KM are energized. The load automatically switches to power supply 21.

[0039] Under dynamic positioning conditions, when the power switching circuit receives the dynamic positioning mode signal, the first contact (contacts 1 and 2) and the second contact (contacts 3 and 4) of XR4 switch 9 close, energizing coil 5 of KA12 relay and coil 8 of KA11 relay, while de-energizing coil 7 of 2KM relay. The load is then powered by power supply 10. When a fault occurs in power supply 10, coil 5 of KA12 relay de-energizes, and the first contact (contacts 1 and 2) and the second contact (contacts 3 and 4) of XR4 switch 9 remain closed. The 2DX potentiometer 6 and coil 8 of KA11 relay are energized, while coil 7 of 2KM relay is de-energized. The load loses power supply, suppressing the automatic switching function and preventing the spread of faults between different power supply redundancy groups due to power switching.

[0040] When exiting the dynamic positioning mode and switching to the non-dynamic positioning mode, the dynamic positioning mode signal disappears, the first contact (contacts 1 and 2) and the second contact (contacts 3 and 4) of XR4 switch 9 open, the coil 8 of KA11 relay is de-energized, and the load is powered by power supply 11, restoring the automatic switching function. When the fault in power supply 10 is cleared, both power supply 10 and power supply 11 are connected, energizing 1DX potentiometer 1, 2DX potentiometer 6, the coil 4 of KT3 time delay relay, the coil 2 of KA2 relay, and the coil 3 of 1KM relay, while de-energizing the coil 7 of 2KM relay, and the load is powered by power supply 10.

[0041] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model using the disclosed methods and techniques, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. Therefore, all equivalent changes made based on the shape, structure, and principle of this utility model without departing from its technical solution should be covered within the protection scope of this utility model.

Claims

1. A power switching circuit suitable for dynamically positioned ships, characterized in that, Including Power Supply 1, Power Supply 2, 1KM Relay, 2KM Relay, 1DX Potentiometer, 2DX Potentiometer, KA2 Relay, KT3 Time Delay Relay, KA11 Relay and KA12 Relay; The three phases of the power supply one are electrically connected to the load circuit through the normally open contacts of the 1KM relay, and the three phases of the power supply two are electrically connected to the load circuit through the normally open contacts of the 2KM relay. The three phases of the power supply are electrically connected to the three-phase terminals of the 1DX potentiometer, and the three phases of the power supply are electrically connected to the three-phase terminals of the 2DX potentiometer. The coil of the KA2 relay is electrically connected between the first phase terminal and the third phase terminal of the 1DX potentiometer. The normally open switch contact of the 1DX potentiometer, the normally closed contact of the 2KM relay, the normally open contact of the KT3 time delay relay, and the coil of the 1KM relay are sequentially electrically connected between the first phase terminal and the third phase terminal of the 1DX potentiometer. The coil of the KT3 time delay relay is electrically connected between the first phase terminal and the third phase terminal of the 1DX potentiometer. The normally open switch contact of the 2DX potentiometer, the normally closed contact of the 1KM relay, the normally closed contact of the KA2 relay, the normally closed contact of the KA11 relay, the normally closed contact of the KA12 relay, and the coil of the 2KM relay are sequentially electrically connected between the first phase terminal and the third phase terminal of the 2DX potentiometer.

2. The power switching circuit suitable for dynamically positioned ships as described in claim 1, characterized in that, It also includes an XR4 switch, wherein the first phase terminal and the third phase terminal of the 1DX potentiometer are electrically connected in sequence to the switch contact of the XR4 switch and the coil of the KA12 relay.

3. A power switching circuit suitable for dynamically positioned ships as described in claim 2, characterized in that, The first and third phase terminals of the 2DX potentiometer are electrically connected sequentially to the two contacts of the XR4 switch and the coil of the KA11 relay.

4. A power switching circuit suitable for dynamically positioned ships as described in claim 1, characterized in that, The three-phase power supply of the first power source is electrically connected to the three-phase terminals of the 1DX potentiometer via fuses FU1, FU2, and FU3, respectively.

5. A power switching circuit suitable for dynamically positioned ships as described in claim 4, characterized in that, An indicator light is electrically connected between the first and second phase terminals of the 1DX potentiometer, and a voltmeter is electrically connected between the second and third phase terminals of the 1DX potentiometer.

6. A power switching circuit suitable for dynamically positioned ships as described in claim 1, characterized in that, The three-phase power supply of the second power source is electrically connected to fuses FU4, FU5, and FU6 respectively between the three-phase terminals of the 2DX potentiometer.

7. A power switching circuit suitable for dynamically positioned ships as described in claim 6, characterized in that, An indicator light is electrically connected between the first and second phase terminals of the 2DX potentiometer, and a voltmeter is electrically connected between the second and third phase terminals of the 2DX potentiometer.

8. A power switching circuit suitable for dynamically positioned ships as described in claim 1, characterized in that, The load circuit includes a switch Q, a first load circuit, and a second load circuit, wherein the first load circuit and the second load circuit are electrically connected to the switch Q.

9. A power switching circuit suitable for dynamically positioned ships as described in claim 8, characterized in that, The load circuit includes a load, a thermal relay FR, and a normally open contact of a 1KM relay. The switch Q is electrically connected to the load through the normally open contact of the 1KM relay and the thermal relay FR.

10. A power switching circuit suitable for dynamically positioned ships as described in claim 8, characterized in that, The second load circuit includes a second load, a thermal relay FR, and a normally open contact of a 2KM relay. The switch Q is electrically connected to the second load through the normally open contact of the 2KM relay and the thermal relay FR.

Images