CN108037347B - Monitoring system and monitoring method for refrigeration power of roll-on-roll-off ship - Google Patents
Monitoring system and monitoring method for refrigeration power of roll-on-roll-off ship Download PDFInfo
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- CN108037347B CN108037347B CN201711431599.4A CN201711431599A CN108037347B CN 108037347 B CN108037347 B CN 108037347B CN 201711431599 A CN201711431599 A CN 201711431599A CN 108037347 B CN108037347 B CN 108037347B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
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Abstract
The invention discloses a refrigerated power monitoring system for a roll-on/roll-off ship, which comprises a refrigerated container, a refrigerated distribution box and a main distribution board, wherein the refrigerated container is arranged in the refrigerated distribution box; a plurality of circuit branches are arranged in each refrigeration distribution box, the circuit branches in one refrigeration distribution box are connected into a main distribution board through a current transformer, the main distribution board is connected with a signal processing unit through a signal acquisition module, each refrigeration distribution box is connected with the signal processing unit through a signal acquisition box, and the signal processing unit is connected with a workstation. The ship comprehensive monitoring alarm control system analyzes and calculates the received states of all the refrigerating sockets, the alarm signal and the current value of the refrigerating distribution box, compares the current value with the preset power consumption and current reference value of the normal work of the refrigerated container, and gives the alarm signal to inform a crew of checking. This method can detect most of the faults associated with the compressor motor.
Description
Technical Field
The invention belongs to the ship power monitoring technology, and particularly relates to a design of a refrigeration power monitoring system of a cargo roll-on-roll-off ship.
Background
In the new generation of ten-thousand-ton rolling ships, a large number of refrigeration sockets are provided for supplying power to refrigerated containers for transportation, but since the refrigerated containers come from different places and the containers are different from one another, and the harsh environment during sea transportation is increased, various problems often occur during transportation: the insulation of the equipment is too low due to aging of the cable and the like, and the compressor works abnormally due to cargo loading or the problems of the container. The abnormal operation of the compressor can damage transported goods, the insulation and low leakage of single equipment can affect other containers in the same power supply loop, and even can affect the whole power grid; and conventional inspection in the marine process cannot find the abnormalities in time at all. The refrigeration power system is monitored, so that the problems of the refrigeration system can be found in time, and the loss is reduced to the minimum. The traditional refrigeration monitoring mainly aims at the refrigerated container, and can not effectively monitor the electric leakage fault; not only is the price expensive, but also the application range is limited because the device is only suitable for the novel refrigerated container provided with the remote data communication module.
Disclosure of Invention
The invention aims to solve the monitoring problem of a refrigeration power system in a shipping process, and provides a design method of a refrigeration power monitoring system of a roll-on-roll-off ship.
The invention provides a refrigerated power monitoring system for a roll-on/roll-off ship, which comprises a plurality of refrigerated containers, a plurality of refrigerated branch boxes and a main distribution board, wherein the refrigerated containers are arranged in the refrigerated branch boxes; a plurality of circuit branches are arranged in each refrigeration distribution box, the circuit branches in one refrigeration distribution box are connected into the main distribution board through a molded case circuit breaker together, the current transformer is arranged in an output end loop of the molded case circuit breaker,
one refrigerated container is correspondingly connected with one circuit branch; each circuit branch comprises a ground fault protection module, an electric leakage indication contact, a breaker on-off state auxiliary contact and a breaker, and in each circuit branch: the ground fault protection module is connected with a leakage indication contact, and the circuit breaker is in a single-pole double-throw mode and controls an auxiliary contact of the circuit breaker in a switching-on/off state;
the main distribution board is connected with the signal processing unit through the signal acquisition module, each refrigeration distribution box is connected with the signal processing unit through one signal acquisition box, and the signal processing unit is connected with the workstation.
Preferably, the refrigerated container is connected to the circuit breaker of the corresponding circuit branch through a marine refrigeration socket.
Preferably, each current transformer of the main distribution board is connected with a signal acquisition module and used for sampling the current of the refrigeration distribution box.
Preferably, the electric leakage indicating contact and the circuit breaker on-off state auxiliary contact of the refrigeration distribution box are connected with the signal collection box and used for processing the on-off state and the electric leakage fault signal of the circuit breaker.
The invention also discloses a method for monitoring the refrigeration power of the roll-on/roll-off ship, and the system for monitoring the refrigeration power of the roll-on/roll-off ship comprises the following steps:
s1, starting the refrigerated container;
s2, the workstation obtains the working current I of each distribution box through the signal acquisition module0The work station obtains the number n of closing switches of the circuit breaker through the signal acquisition box0；
S3, setting normal working current;
s4, comparing the normal working current obtained in S3 with the rated working current of the equipment: if the temperature is within the rated range, the next step is carried out; if the refrigerated containers are not inspected within the rated range: if the fault occurs, carrying out fault clearing work, and if the fault does not occur, adding the normal working current obtained in the step S3 into a rated current database;
s5, at regular time intervals, the work station obtains the working current I of the refrigeration distribution box through the signal acquisition module again, and the work station obtains the number n of closing switches of the circuit breaker through the signal acquisition box again;
s6, judging whether the working current of each distribution box is in a rated current database or not by combining the working current I and the number n of closing switches: if yes, no operation is carried out; otherwise, pre-alarming for times + 1;
and S7, returning to the step S5 for circulation, and outputting a fault alarm signal of the refrigerated container by the workstation when the pre-alarm times are more than the set times.
Preferably, in step S3, ± 3% is set as the normal operating current range.
Preferably, in step S5, the fixed time interval is 1 min.
Preferably, in step S6, the value of I/n is used to determine whether the operating current of each distribution box is in the rated current database.
Preferably, in step S7, the set number of times is 10.
Preferably, in step S2 and step S5, the workstation obtains the leakage fault condition of the circuit breaker through the signal collection box, and immediately alarms when the leakage fault is found.
The invention has the advantages of
The ship comprehensive monitoring alarm control system analyzes and calculates the received states of all refrigeration sockets, alarm signals and current values of the refrigeration distribution boxes, compares the alarm signals with preset power consumption and current reference values of normal work of the refrigeration container, and gives out alarm signals to inform a crew of checking if the refrigeration container is abnormal for a long time. This method can detect most of the faults associated with the compressor motor.
Further, if the circuit breaker corresponding to a certain refrigeration socket is received to send out an electric leakage fault alarm, an alarm signal is sent out in time to inform a crew of removing a fault point.
Furthermore, the MIMIC picture of the whole ship refrigeration socket can be displayed on a display screen of the ship comprehensive monitoring alarm control system, and the MIMIC picture is used for displaying the service conditions and the alarm states of all refrigeration sockets.
Drawings
Fig. 1 is a single line diagram of the system of the present invention.
FIG. 2 is a flow chart of a power monitoring method according to the present invention.
Detailed Description
The invention is further illustrated by the following examples, without limiting the scope of the invention:
referring to fig. 1, a monitoring system for refrigeration power of a roll-on/roll-off ship comprises a plurality of refrigeration containers 11, a plurality of refrigeration branch boxes and a main distribution board; each refrigeration divides and sets up a plurality of circuit branch roads in the electric box, and a plurality of circuit branch roads in a refrigeration divides the electric box to insert main distribution board through a moulded case circuit breaker 12 jointly, and current transformer 5 installs in moulded case circuit breaker 12 output end return circuit (on the boats and ships main distribution board every refrigeration divides and installs a current transformer 5 on the busbar of case load switch for measure this refrigeration current that divides the electric box):
one refrigerated container 11 is correspondingly connected with one circuit branch; each circuit branch comprises a ground fault protection module 1 (model: Schneider Vigi MH type ground fault protection module), a leakage indication contact 2 (model: Schneider SDV leakage indication contact), a breaker on-off state auxiliary contact 3 (Schneider OF breaker on-off state auxiliary contact) and a breaker 4 (model: Schneider NSX100F molded case breaker), and in each circuit branch: the earth fault protection module 1 is connected with the electric leakage indication contact 2, and the circuit breaker 4 is in a single-pole double-throw mode and controls the circuit breaker on-off state auxiliary contact 3;
the main distribution board is connected with a signal processing unit 7 (a signal processing unit of the ship comprehensive monitoring and alarm control system) through a signal acquisition module 6 (a signal acquisition module of the ship comprehensive monitoring and alarm control system), and the signal acquisition module 6 of the ship comprehensive monitoring and alarm control system is installed in the main distribution board and used for receiving the actual current of each refrigeration branch box; each refrigerating distribution box is respectively connected with the signal processing unit 7 through a signal acquisition box 9 (a signal acquisition box of the ship comprehensive monitoring alarm control system), and the signal acquisition box 9 of the ship comprehensive monitoring alarm control system is arranged near the refrigerating distribution box; the signal processing unit 7 is connected with a work station 8 (a work station of the ship comprehensive monitoring alarm control system).
Specifically, the refrigerated container 11 is connected to the circuit breaker 4 of the corresponding circuit branch via the marine refrigeration socket 10. The arrangement of the refrigeration distribution box according to the refrigeration socket 10 is reasonable, the refrigeration distribution box is arranged at each position of a ship, all the circuit breakers 4 and the ground fault protection modules 1 are arranged in the refrigeration distribution box, and the circuit breakers 4 are connected with the refrigeration socket 10 through cables to supply power for the refrigeration container 11.
Specifically, each current transformer 5 of the main distribution board is connected with a signal acquisition module 6 and used for sampling the current of the refrigeration distribution box.
Specifically, the electric leakage indicating contact 2 and the circuit breaker on-off state auxiliary contact 3 of the refrigeration distribution box are connected with the signal acquisition box 9 and used for processing the on-off state and the electric leakage fault signal of the circuit breaker 4.
With reference to fig. 2, a method for monitoring the refrigeration power of a roll-on/roll-off ship based on the refrigeration power monitoring system of the roll-on/roll-off ship specifically includes the following steps:
s1, starting the refrigerated container 11;
s2, the workstation 8 obtains the working current I of each distribution box through the signal acquisition module 60The workstation 8 obtains the number n of closing switches of the circuit breaker 4 through the signal acquisition box 90；
S3, setting normal working current;
s4, comparing the normal working current obtained in S3 with the rated working current of the equipment: if the temperature is within the rated range, the next step is carried out; if the individual refrigerated containers 11 are not inspected within the nominal range: if the fault occurs, carrying out fault clearing work, and if the fault does not occur, adding the normal working current obtained in the step S3 into a rated current database;
s5, at regular time intervals, the work station 8 obtains the working current I of the refrigeration distribution box through the signal acquisition module 6 again, and the work station 8 obtains the number n of closing switches of the circuit breaker 4 through the signal acquisition box 9 again;
s6, judging whether the working current of each distribution box is in a rated current database or not by combining the working current I and the number n of closing switches: if yes, no operation is carried out; otherwise, pre-alarming for times + 1;
and S7, returning to the step S5 for circulation, and outputting a fault alarm signal of the refrigerated container 11 by the workstation 8 when the pre-alarm frequency is more than the set frequency.
Specifically, in step S3, I0/n0± 3% is set as the normal operating current range.
Specifically, in step S5, the fixed time interval is 1 min.
Specifically, in step S6, the value of I/n is used to determine whether the operating current of each distribution box is in the rated current database.
Specifically, in step S7, the number of times is set to 10.
Preferably, in step S2 and step S5, the workstation 8 obtains the leakage fault condition of the circuit breaker 4 through the signal collection box 9, and immediately gives an alarm when the leakage fault is found.
Preferably, the MIMIC (micro integrated Circuit) picture of the whole ship refrigeration socket 10 can be displayed on a display screen of the ship comprehensive monitoring alarm control system, and is used for displaying the service conditions and alarm states of all refrigeration sockets.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (6)
1. A method for monitoring the refrigeration power of a roll-on/roll-off ship is based on a system for monitoring the refrigeration power of the roll-on/roll-off ship, and comprises a plurality of refrigeration containers (11), a plurality of refrigeration branch boxes and a main distribution board; a plurality of circuit branches are arranged in each refrigerating distribution box, the circuit branches in one refrigerating distribution box are connected to a main distribution board through a molded case circuit breaker (12), and a current transformer (5) is arranged in an output end loop of the molded case circuit breaker (12);
a refrigerated container (11) is correspondingly connected with a circuit branch; each circuit branch comprises a ground fault protection module (1), a leakage indication contact (2), a breaker on-off state auxiliary contact (3) and a breaker (4), and in each circuit branch: the earth fault protection module (1) is connected with the electric leakage indication contact (2), and the circuit breaker (4) is in a single-pole double-throw mode and controls the auxiliary contact (3) of the circuit breaker in a switching-on/off state;
the main distribution board is connected with a signal processing unit (7) through a signal acquisition module (6), each refrigeration distribution box is connected with the signal processing unit (7) through a signal acquisition box (9), the signal processing unit (7) is connected with a workstation (8),
the monitoring method is characterized by comprising the following steps:
s1, starting the refrigerated container (11);
s2, the workstation (8) obtains the working current I of each distribution box through the signal acquisition module (6)0The workstation (8) obtains the number n of closing switches of the circuit breaker (4) through the signal acquisition box (9)0；
S3, setting normal working current;
s4, comparing the normal working current obtained in S3 with the rated working current of the equipment: if the temperature is within the rated range, the next step is carried out; if the individual refrigerated containers (11) are not inspected within the nominal range: if the fault occurs, carrying out fault clearing work, and if the fault does not occur, adding the normal working current obtained in the step S3 into a rated current database;
s5, at regular intervals, the work station (8) obtains the working current I of the refrigeration distribution box through the signal acquisition module (6) again, and the work station (8) obtains the number n of closing switches of the circuit breaker (4) through the signal acquisition box (9) again;
s6, judging whether the working current of each distribution box is in a rated current database or not by combining the working current I and the number n of closing switches: if yes, no operation is carried out; otherwise, pre-alarming for times + 1;
and S7, returning to the step S5 for circulation, and when the pre-alarm times are more than the set times, outputting a fault alarm signal of the refrigerated container (11) by the workstation (8).
2. The method for monitoring power for roll-on-roll-off ship refrigeration power as claimed in claim 1, wherein in step S3, (I) is0/n0) ± 3% is set as the normal operating current range.
3. The method for monitoring power for roll-on-roll-off ship refrigeration power as claimed in claim 1, wherein the fixed time interval is 1min in step S5.
4. The method for monitoring power of a ro-ro ship refrigerator according to claim 1, wherein in step S6, the value of I/n is used to determine whether the operating current of each distribution box is in the rated current database.
5. The method for monitoring power for roll-on/roll-off ship refrigeration power as claimed in claim 1, wherein the set number of times is 10 in step S7.
6. Method for monitoring power for rolling and shipping cold storage according to claim 1, characterized in that in step S2 and step S5, the workstation (8) obtains the leakage fault condition of the breaker (4) through the signal collection box (9), and immediately gives an alarm when the leakage fault is found.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711431599.4A CN108037347B (en) | 2017-12-26 | 2017-12-26 | Monitoring system and monitoring method for refrigeration power of roll-on-roll-off ship |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711431599.4A CN108037347B (en) | 2017-12-26 | 2017-12-26 | Monitoring system and monitoring method for refrigeration power of roll-on-roll-off ship |
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| CN108037347A CN108037347A (en) | 2018-05-15 |
| CN108037347B true CN108037347B (en) | 2020-08-11 |
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| CN201663358U (en) * | 2009-12-22 | 2010-12-01 | 深圳市飞霞机电技术有限公司 | Intelligent energy consumption monitoring type three-phase distribution cabinet |
| KR101659552B1 (en) * | 2015-12-23 | 2016-09-23 | 이종기 | Monitoring and control system for ship loading reefer container without modem |
| CN206411177U (en) * | 2016-12-27 | 2017-08-15 | 西安达刚路面机械股份有限公司 | A kind of electrical system self-diagnosis system |
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Effective date of registration: 20200701 Address after: Shahekou, shierwei, Yizheng City, Yangzhou City, Jiangsu Province Applicant after: China Merchants Jinling shipping (Jiangsu) Co., Ltd Address before: 210000 Yanjiang Road, Drum Tower District, Nanjing, Jiangsu Province, No. 55 Applicant before: NANJING JINLING SHIPYARD Co.,Ltd. |
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