WO2018218862A1

WO2018218862A1 - Method and device for verifying voltage control performance, and ship power grid system

Info

Publication number: WO2018218862A1
Application number: PCT/CN2017/108783
Authority: WO
Inventors: 韩佳
Original assignee: 广船国际有限公司
Priority date: 2017-05-31
Filing date: 2017-10-31
Publication date: 2018-12-06
Also published as: CN107065626A; CN107065626B

Abstract

A method and device for verifying voltage control performance, and a ship power grid system. The method comprises: determining an online motor (410) currently in a power generation state in a ship power grid system (S110); determining a corresponding connection switch when the online motor (410) is electrically connected to a high voltage distribution board (420) in the ship power grid system (S120); if it is detected that the connection switch is turned off and then turned on in a set period, determining the work state of a power device (370) in a ship in the set period (S130); and determining the voltage control performance of the ship power grid system according to the work state (S140). By monitoring the on and off of the connection switch corresponding to the online motor (410) and determining the voltage control performance of the ship power grid system according to the work state of the power device (370) in the set period, the control performance of a corresponding voltage control circuit on a non-DP3 ship during a voltage sag is verified.

Description

Method, device and ship grid system for verifying voltage control performance

Technical field

The invention relates to the technical field of power control, in particular to a method and a device for verifying voltage control performance in a ship design and a ship power grid system.

Background technique

In the ship power grid system, the voltage control performance can be 2-3 seconds through the voltage dip in the main power supply grid, whether the power and grid auxiliary equipment can function normally and whether it can be realized during the voltage dip. A smooth transition to reflect.

In the prior art, the voltage control during the voltage dip is usually directed to a ship equipped with a dynamic positioning system (DNV-DP3) symbol. If there is no ship equipped with a dynamic positioning system, there is generally no application for the voltage dip process. Voltage control circuit.

Since there is no solution for voltage control performance on ships other than DP3, there is no test method for verifying voltage control performance.

Summary of the invention

Embodiments of the present invention provide a verification method and device for voltage control performance and a ship power grid system to verify the voltage control performance of a non-DP3 ship.

In a first aspect, an embodiment of the present invention provides a method for verifying voltage control performance, including:

Determining the on-grid motor currently in the state of power generation in the ship's power grid system;

Determining a corresponding connection switch when the net motor is electrically connected to the high voltage switchboard in the ship grid system;

If it is detected that the connection switch is first opened and then closed within a set time, determining an operating state of the power device in the ship within the set time;

According to the working state, the voltage control performance of the ship's power grid system is determined.

In a second aspect, an embodiment of the present invention provides a verification device for voltage control performance, including:

a first determining module, configured to determine an on-grid motor currently in a power generating state in the ship power grid system;

a second determining module, configured to determine a corresponding connection switch when the net motor is electrically connected to the high voltage switchboard in the ship network system;

a monitoring module, configured to monitor that the connection switch is first opened and then closed within a set time;

a third determining module, configured to determine an operating state of the power device in the ship within the set time;

And a fourth determining module, configured to determine a voltage control performance of the ship network system according to the working state.

In a third aspect, an embodiment of the present invention provides a ship power grid system, including: a main power generation module, a high voltage power distribution module, an electric drive module, a transformer module, a low voltage power distribution module, and a power device, and further includes any embodiment of the present invention. a verification device for providing voltage control performance;

a verification device, connected to the main power generation module, for determining the on-grid motor in the main power generation module, and determining a connection switch electrically connected to the high voltage power distribution module in the main power generation module, and controlling opening and closing of the connection switch;

The main power generation module is electrically connected to the high voltage power distribution module through a connection switch for providing main power to the high voltage power distribution module;

The high voltage power distribution module is electrically connected to the low voltage power distribution module through the transformer module, and is used to form a main control loop of the ship power grid system;

The electric drive module is electrically connected to the high voltage power distribution module and the low voltage power distribution module respectively, and is used to form a standby control loop of the ship power grid system when the main control loop is in an open circuit;

Power equipment, connected to the main control loop and the standby control loop for the main control loop Or the power control of the alternate control loop generates power.

In the verification method and device for voltage control performance provided above, and in the ship network system, when verifying the voltage control performance, first determine the on-grid motor currently in the power generation state of the ship power grid system, and then determine that the grid motor is electrically connected to the ship grid. Corresponding connection switch of the high-voltage switchboard in the system; after detecting that the connection switch is disconnected and then closed within the set time, the working state of the power equipment in the ship is determined within the set time; finally, it is determined according to the working state. Voltage control performance of the ship's grid system. Based on the above technical solution, the control performance of the corresponding voltage control circuit can be verified when the voltage is suddenly dropped on the non-DP3 ship, and the verification of the operational feasibility of the designed voltage control circuit during the voltage dip is realized.

DRAWINGS

1 is a schematic flow chart of a verification method of voltage control performance in Embodiment 1 of the present invention;

2 is a schematic structural diagram of a voltage verification performance verification apparatus in Embodiment 2 of the present invention;

3 is a schematic structural diagram of a ship power grid system according to Embodiment 3 of the present invention;

4 is a schematic structural view of a ship power grid system according to Embodiment 4 of the present invention;

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. It should also be noted that, for ease of description, only some, but not all, of the structures related to the present invention are shown in the drawings.

Embodiment 1

1 is a schematic flow chart of a method for verifying voltage control performance according to Embodiment 1 of the present invention. The party The method is applicable to the verification of the control performance of the voltage control circuit set in the non-DP3 ship, and the method can be performed by a voltage control performance verification device, wherein the device can be implemented by software and/or hardware.

As shown in FIG. 1, a method for verifying voltage control performance according to Embodiment 1 of the present invention includes the following steps:

Step 110: Determine an on-grid motor currently in a power generation state in the ship power grid system.

In the present embodiment, a ship electrical system can be understood as a power system that is provided to provide various electrical energy support to a sailing vessel. The net motor may be specifically used as a main power generation device in the ship power grid system to provide power to the ship power grid system, wherein the net motor may be a diesel generator, generally, the net motor The rated power can be 8800KW or 6600KW.

Specifically, this step can determine the on-grid motor currently in the power generation state to facilitate control thereof, thereby controlling the power device to complete the verification of the voltage control performance.

Step 120: Determine a corresponding connection switch when the net motor is electrically connected to the high voltage switchboard in the ship network system.

In this embodiment, the high-voltage switchboard is simultaneously set in the ship power grid system, and the voltage generated by the net motor can be received to form a main control with the low-voltage switchboard in the ship network system through the set circuit connection. Loop. In this embodiment, the net motor and the high-voltage switchboard are electrically connected through a connection switch, and it can be determined that each of the above-mentioned net motors has a corresponding connection switch connected to the high-voltage switchboard.

Specifically, after determining the on-grid motor that is currently in the power generation state, the connection switch corresponding to the grid motor is further determined to control the grid motor by controlling the connection switch. It should be noted that in this step, the disconnection or closing of the connection switch can be artificially controlled, and the connection can also be automatically controlled. Open and close the switch.

Step 130: If it is detected that the connection switch is first opened and then closed within a set time, determining an operating state of the power device in the ship within the set time.

In the present embodiment, the connection switch is first opened and then closed during the set time to simulate the voltage dip. Generally, one of the situations in which the voltage dip occurs may be that the main power supply in the ship's power grid system instantaneously fails in the network motor. At this time, in order to ensure the normal operation of each power equipment in the ship, a backup power source is set.

In this step, the voltage control performance verification of the voltage dip can be achieved by monitoring the working state of the power device within a set time, wherein the set time can be the actual time when the voltage dips, preferably 2-3 second. This step specifically verifies the voltage control performance of the main power supply during the voltage dip during the switching of the network motor to the set standby power source by monitoring the working state of the power equipment in the ship.

Step 140: Determine, according to the working state, a voltage control performance of the ship electrical system.

In this embodiment, the working state of the power device may be normal operation, work stop, or delayed shutdown. The voltage control performance can be verified by determining the operating state of the power plant. Illustratively, it may be determined that its voltage control performance is good when it is determined that the operating state of the power device is normal operation.

The verification method of the voltage control performance provided by the first embodiment of the present invention first determines the on-grid motor currently in the power generation state of the ship power grid system when verifying the voltage control performance, and then determines the high voltage in the grid motor electrically connected to the ship grid system. Corresponding connection switch when the switchboard is used; after detecting that the connection switch is disconnected and then closed within the set time, the working state of the power equipment in the ship is determined within the set time; finally, the ship power grid system is determined according to the working state. Voltage control performance. By using this method, the control performance of the corresponding voltage control circuit can be verified when the voltage is suddenly dropped on the non-DP3 ship, and the verification of the operational feasibility of the designed voltage control circuit at the voltage dip is realized.

Based on the above technical solutions, the verification method of the voltage control performance further increases the control of the connection switch to be closed and then closed after the set time.

Specifically, the control mode of the switch is preferably automatic control. The advantage of this setting is that it can effectively simulate the process of voltage dip, so that the voltage control performance can be effectively verified.

Based on the foregoing technical solutions, determining, according to the working state, determining that the voltage control performance of the ship network system is further optimized: if the working state of the power device in the set time is normal, determining The voltage control performance of the ship grid system is feasible for voltage control operations when the voltage dips.

The advantage of this setting is that the voltage control performance can be effectively verified by the working state of the power equipment during the set time. Wherein, if the working state of the power equipment during the set time is work stop or time delay stop, it is determined that the voltage control performance of the ship power grid system is a voltage control operation when the voltage dips.

Based on the above various technical solutions, the power device may preferably be a main pusher for propelling the ship.

Specifically, the main pushers may be one or more, preferably two. The main pusher generates the power required by the ship through power control on the ship. The advantage of such a setting of the power unit is that the voltage control performance can be verified by the operating state of the main pusher.

Embodiment 2

2 is a schematic structural diagram of a voltage verification performance verification apparatus according to Embodiment 2 of the present invention. As shown in FIG. 2, the specific structure of the voltage control performance verification apparatus includes: a first determining module 210, a second determining module 220, and monitoring. The module 230, the third determining module 240, and the fourth determining module 250.

The first determining module 210 is configured to determine an on-grid motor currently in a power generating state in the ship power grid system.

The second determining module 220 is configured to determine a corresponding connection switch when the net motor is electrically connected to the high voltage switchboard in the ship electrical system.

The monitoring module 230 is configured to monitor that the connection switch is first opened and then closed within a set time.

The third determining module 240 is configured to determine an operating state of the power device in the ship within the set time.

The fourth determining module 250 is configured to determine a voltage control performance of the ship network system according to the working state.

In this embodiment, the verification device may first determine, by the first determining module 210, the on-grid motor currently in the power generation state in the ship power grid system; and then determine, by the second determining module 220, the high voltage matching in the grid motor electrical connection ship grid system. Corresponding connection switch of the electric board; afterwards, the monitoring module 230 can determine the working state of the power equipment in the ship within the set time by the third determining module 240 when the monitoring connection switch is first opened and then closed within the set time. Finally, the voltage control performance of the ship grid system is determined by the fourth determining module 250 according to the working state.

In the technical solution of the embodiment, the voltage dip is simulated by monitoring the opening and closing state of the connection switch corresponding to the net motor, and the verification of the voltage control performance is completed by monitoring the working state of the power device. The problem that the non-DP3 ship voltage dip scheme cannot be verified is solved, and the verification of the non-DP3 ship voltage dip scheme is realized.

Based on the above technical solution, the voltage control performance verification device further includes a control module, configured to control the connection switch to be turned off and then closed within a set time.

The advantage of this setup is the analog voltage dip process, which provides the basis for voltage control performance verification. foundation.

Based on the foregoing technical solution, the fourth determining module 250 is further configured to: if the working state of the power device in the set time is normal, determine that the voltage control performance of the ship network system is The voltage control operation at the time of voltage dip is feasible. The advantage of the optimization of the fourth determining module is that the power control performance of the ship's power grid system is effectively verified by the working state of the power equipment.

Based on the above technical solution, the power device is preferably a main pusher for propelling the ship. The advantage of such a setting of the power equipment is that the voltage control performance of the ship's power grid system can be verified by the operation of the propeller.

Embodiment 3

3 is a schematic structural diagram of a ship power grid system according to Embodiment 3 of the present invention. The specific structure of the ship power grid system includes: a main power generation module 320, a high voltage power distribution module 330, an electric drive module 360, a transformer module 340, and a low voltage power distribution system. The module 350 and the power device 370 are further characterized by: a verification device 310 for voltage control performance provided by any embodiment of the present invention.

The verification device 310 is connected to the main power generation module 320 for determining the on-grid motor in the main power generation module 320, and determining a connection switch electrically connected to the high voltage power distribution module 330 in the main power generation module 320. And controlling the opening and closing of the connection switch.

The main power generation module 320 is electrically connected to the high voltage power distribution module 330 through a connection switch for providing main power to the high voltage power distribution module 330.

Specifically, the main power generation module 320 may be two or more, preferably two. The main power generation module 320 can be a diesel generator with a rated power of 8800 KW and/or 6600 KW for providing a full ship The amount of electricity required. The high voltage power distribution module 330 may be two or more, preferably two, connected to the main power generation module 320 through a connection switch. The high voltage power distribution modules 330 can be connected by a tie switch.

The high voltage power distribution module 330 is electrically connected to the low voltage power distribution module 350 through the transformer module 340 for forming a main control loop of the ship power grid system.

Illustratively, the transformer module 340 can be two or more, preferably two, corresponding to the high voltage power distribution module 330. The low voltage power distribution modules 350 can be two or more, preferably two. The high voltage power distribution module 330, the transformer module 340 and the low voltage power distribution module 350 constitute a main control loop of the ship power grid system, providing power control for the ship.

The electric drive module 360 is electrically connected to the high voltage power distribution module 330 and the low voltage power distribution module 350, respectively, for forming an alternate control loop of the marine power grid system when the main control loop is in an open circuit.

Specifically, the electric drive module 360 can be electrically connected to the high voltage power distribution module 330 and the low voltage power distribution module 350 through a switch. When the main control loop works normally, the switch corresponding to the standby control loop is in an off state; when the main control loop fails The switch corresponding to the standby control loop is in an on state to provide power control for the ship.

A power device 370 is coupled to the main control loop and the standby control loop for generating power according to power control of the main control loop or the standby control loop.

In particular, the power plant 370 can be an electrically powered propeller that generates power to the vessel based on the power of the primary control loop or the alternate control loop.

In this embodiment, the ship power grid system may first be connected to the main power generation module 320 by the verification device 310 to determine the on-grid motor in the main power generation module 320. Simultaneously determining the main hair a connection switch electrically connected to the high voltage power distribution module 330 in the electrical module 320, and controlling the opening and closing of the connection switch; then the main power generation module 320 is electrically connected to the high voltage power distribution module 330 through a connection switch, Providing a main power supply to the high-voltage power distribution module 330; then the high-voltage power distribution module 330 is electrically connected to the low-voltage power distribution module 350 through the transformer module 340 for forming a main control loop of the ship power grid system; Then, the electric drive module 360 is electrically connected to the high voltage power distribution module 330 and the low voltage power distribution module 350, respectively, for forming an alternate control loop of the marine power grid system when the main control loop is in an open circuit; and finally the power device 370 And connected to the main control loop and the standby control loop for generating power according to power control of the main control loop or the standby control loop.

The technical solution of the embodiment solves the problem that the non-DP3 ship voltage dip solution cannot be verified by the cooperation of the main power generation module, the high voltage power distribution module, the electric drive module, the transformer module, the low voltage power distribution module, the power equipment, and the verification device. The problem was verified by the non-DP3 ship voltage dip scheme.

Embodiment 4

4 is a schematic structural diagram of a ship network system according to Embodiment 4 of the present invention. On the basis of the foregoing embodiments, the main power generation module is further optimized to include at least two on-grid motors 410. At least two of the net motors 410 are electrically connected to the high voltage power distribution module through connection switches.

Specifically, the on/off of the connection switch corresponding to the net motor 410 determines whether the motor is on the network or not. The state of the connection switch can be automatically controlled.

The high voltage power distribution module is preferably further optimized to include two sections of high voltage switchboard 420, wherein the two sections of high voltage switchboard are connected by two first contact switches 430 in series.

Specifically, the on/off of the first tie switch 430 depends on the position of the high voltage switchboard 420 where the net motor is located. The first tie switch 430 can be automatically controlled.

The low voltage power distribution module is preferably further optimized to include two sections of low voltage switchboard 450, wherein the two sections of low voltage switchboard 450 are connected by two second tie switches 460 in series.

Specifically, the on/off of the second tie switch 460 depends on the position of the high voltage switchboard 420 where the net motor 410 is located. At the same time, the on/off of the second communication switch 460 corresponds to the on and off of the first communication switch 430.

Preferably, the transformer module is further optimized to include two transformers 440, wherein two ends of the transformer 440 are respectively connected to the high voltage switchboard 420 and the low voltage switchboard 450 in one-to-one correspondence.

Specifically, the transformer 440 may be a daily-use transformer, and the transformer 440 is connected to the high-voltage switchboard 420 and the low-voltage switchboard 450, respectively, for voltage conversion, thereby providing power to the ship.

Preferably, the electric drive module is further optimized to include two uninterruptible power supply boxes 470, wherein two ends of the uninterruptible power supply box 470 are respectively connected to the high voltage switchboard 420 and the low voltage switchboard 450 in one-to-one correspondence.

Specifically, the uninterruptible power supply box 470 can be connected to the high voltage switchboard 420 and the low voltage switchboard 450 in a one-to-one correspondence through a switch, and when the main control loop fails, the ship's power grid system is connected to provide power to the ship.

In this embodiment, the main power generation module is further optimized to include at least two on-grid motors 410, wherein the at least two on-grid motors 410 respectively pass the connection switch and the high voltage power distribution module. Electrically connecting; the high voltage power distribution module is then further optimized to include two sections of high voltage power distribution board 420, wherein the two sections of high voltage power distribution board are connected by two first series connection switches 430; Optimized to include two sections of low voltage switchboard 450, wherein the two sections of low voltage switchboard 450 are connected by two second tie switches 460 in series; the transformer module is further optimized to include two transformers 440, wherein Both ends of the transformer 440 and the high voltage The power distribution board 420 and the low voltage power distribution board 450 are connected in one-to-one correspondence; finally, the power drive module is further optimized to include two uninterruptible power supply boxes 470, wherein the two ends of the uninterruptible power supply box 470 are respectively associated with the high voltage power distribution The board 420 and the low voltage switchboard 450 are connected in one-to-one correspondence.

The technical solution of the embodiment solves the non-DP3 ship voltage dip scheme cannot be verified by the cooperation of the net motor, the high voltage switchboard, the first tie switch, the transformer, the low voltage switchboard, the second tie switch, and the power box. The problem was verified by the non-DP3 ship voltage dip scheme.

On the basis of the above various embodiments, if the at least two net motors 410 are respectively connected to the same high voltage switchboard 420 through the connection switch, the two first contact switches 430 connected in series are in the off state. And the two second communication switches 460 are in a closed state; otherwise, the two first communication switches 430 are in a closed state, and the two second communication switches 460 are in the Disconnected state.

The advantage of this arrangement is that the power supply of the ship's power grid system is achieved according to the position of the net motor and by the cooperation of the first tie switch and the second tie switch.

Based on the foregoing various embodiments, the at least two on-grid motors 410 preferably include at least one generator having a rated power of a first power value and at least one generator having a rated power of a second power value. The first power value is higher than the second power value.

Specifically, the generator can be a diesel generator. The advantage of such a setting in the grid motor is that, under normal sailing conditions, it is preferred to use at least one high-power generator and at least one low-power generator.

Through the above description of the embodiments, those skilled in the art can clearly understand that the present invention can be implemented by software and necessary general hardware, and can also be implemented by hardware, but in many cases, the former is a better implementation. . Based on this understanding, the technical solution of the present invention is essentially Or the part contributing to the prior art can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a computer floppy disk, read-only memory (ROM). , Random Access Memory (RAM), Flash (FLASH), hard disk or optical disk, etc., including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the present invention. The method described in the examples.

Note that the above are only the preferred embodiments of the present invention and the technical principles applied thereto. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various modifications, changes and substitutions may be made without departing from the scope of the invention. Therefore, the present invention has been described in detail by the above embodiments, but the present invention is not limited to the above embodiments, and other equivalent embodiments may be included without departing from the inventive concept. The scope is determined by the scope of the appended claims.

Claims

A method for verifying voltage control performance, comprising:

Determining the on-grid motor currently in the state of power generation in the ship's power grid system;

Determining a corresponding connection switch when the net motor is electrically connected to the high voltage switchboard in the ship electrical system;

If it is detected that the connection switch is first opened and then closed within a set time, determining an operating state of the power device in the ship within the set time;

According to the working state, the voltage control performance of the ship grid system is determined.
The method of claim 1 further comprising:

The connection switch is controlled to be turned off and then closed within a set time.
The method of claim 1 wherein determining a voltage control performance of said marine electrical system based on said operational state comprises:

If the operating state of the power equipment during the set time is normal operation, it is determined that the voltage control performance of the marine power grid system is a voltage control operation when the voltage dips.
A method according to any of claims 1-3, the power device being a main pusher for propelling a ship.
A verification device for voltage control performance, comprising:

a first determining module, configured to determine an on-grid motor currently in a power generating state in the ship power grid system;

a second determining module, configured to determine a corresponding connection switch when the net motor is electrically connected to the high voltage switchboard in the ship electrical system;

a monitoring module, configured to monitor that the connection switch is first opened and then closed within a set time;

a third determining module, configured to determine an operating state of the power device in the ship within the set time;

a fourth determining module, configured to determine a voltage control of the ship network system according to the working state Performance.
The device according to claim 5, further comprising:

And a control module, configured to control the connection switch to be turned off and then closed within a set time.
A ship power grid system, comprising: a main power generation module, a high voltage power distribution module, an electric drive module, a transformer module, a low voltage power distribution module, and a power device, further comprising: the verification device according to claim 5 or ;

The verification device is connected to the main power generation module, configured to determine a grid motor in the main power generation module, and simultaneously determine a connection switch electrically connected to the high voltage power distribution module in the main power generation module, and control Disconnecting and closing the connection switch;

The main power generation module is electrically connected to the high voltage power distribution module through a connection switch, and is configured to provide a main power source to the high voltage power distribution module;

The high voltage power distribution module is electrically connected to the low voltage power distribution module through the transformer module, and is used to form a main control loop of the ship power grid system;

The electric drive module is electrically connected to the high voltage power distribution module and the low voltage power distribution module, respectively, for forming a standby control loop of the ship power grid system when the main control loop is in an open circuit;

The power device is coupled to the main control loop and the standby control loop for generating power according to power control of the main control loop or the standby control loop.
The marine power grid system according to claim 7, wherein said main power generation module comprises at least two on-grid motors, wherein said at least two on-grid motors respectively pass through a connection switch and said high voltage power distribution module Electrical connection

The high-voltage power distribution module includes two high-voltage power distribution boards, wherein the two-stage high-voltage power distribution board is connected by two first series connection switches;

The low-voltage power distribution module includes two low-voltage power distribution boards, wherein the two-stage low-voltage power distribution boards are connected by two second contact switches connected in series;

The transformer module includes two transformers, wherein two ends of the transformer are respectively connected to the high voltage switchboard and the low voltage switchboard in one-to-one correspondence;

The electric drive module includes two uninterruptible power supply boxes, wherein two ends of the uninterruptible power supply box are respectively connected to the high voltage switchboard and the low voltage switchboard in one-to-one correspondence.
A marine power grid system according to claim 8 wherein:

If the at least two net motors are respectively connected to the same high voltage switchboard through the connection switch, the two first contact switches in series are in an off state, and the two second contact switches in series Are in a closed state; otherwise,

The two first communication switches connected in series are in a closed state, and the two second communication switches in series are in an open state.
The marine power grid system according to claim 8 or 9, wherein said at least two in-line motors include at least one generator having a rated power of a first power value and at least one rated power being a second power value. Generator, wherein the first power value is higher than the second power value.