CN218886116U - Power module detection device of distributed control system - Google Patents
Power module detection device of distributed control system Download PDFInfo
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- CN218886116U CN218886116U CN202223146943.4U CN202223146943U CN218886116U CN 218886116 U CN218886116 U CN 218886116U CN 202223146943 U CN202223146943 U CN 202223146943U CN 218886116 U CN218886116 U CN 218886116U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The utility model relates to a distributed control system power module detection device. At present, unsafe phenomena such as tripping of units and the like caused by power system abnormity of a distributed control system occur in each thermal power plant of a power system, a power module of the distributed control system needs to be returned to the plant for verification, and the distributed control system has large workload and high cost. A decentralized control system power module detection device, its constitution includes: a power switch and a voltage regulator (2) are connected in series in outgoing lines of a 220VAC power supply (1) and a 220VAC power supply, the voltage regulator is connected in series at one incoming line power supply of a distributed control system control cabinet power supply module (3), the distributed control system control cabinet power supply module is connected with a wiring terminal row (4-1) in a power detection box (4), and a change-over switch in the power detection box is connected with a universal meter (5) through a wire and an intermediate relay. The utility model discloses be applied to power module detection area.
Description
The technical field is as follows:
the utility model relates to a distributed control system power module detection device.
Background art:
the intelligent deep EDPFNT + DCS system control cabinet power supply module in China receives double-circuit redundant 220VAC power supply input, outputs 24VDC and 48VDC voltage, provides a working power supply for a Distributed Processing Unit (DPU) and an IO module in a control cabinet, and provides a working or detection power supply for external transmitter equipment and switch equipment.
According to the thermal engineering supervision standard of coal-fired units of thermal power plants of China Huaneng group company and the key requirements of thermal power plant thermal control equipment prevention and system accident prevention of thermal power plants, DCS hardware accidents are prevented, and the requirements are clear: the running time of more than 5 years, whether the appearances of electronic components on the non-closed modules such as a controller, a power supply and the like are good or not should be checked along with the opportunity of maintenance, and if the capacitor has a bulge or a liquid leakage phenomenon, the module should be replaced as soon as possible. The DCS needs to be diagnosed when the operation time reaches more than 8 years, so that targeted system maintenance is facilitated, and comprehensive rechecking is carried out along with C-level and above overhaul. The DCS receiving two external ac power supplies should have a reliable power supply redundancy function, and the loss or failure of any one external power supply does not cause a failure, data loss, or abnormal action of any part of the control system. At present, unsafe phenomena such as unit tripping caused by abnormity of a DCS power supply system and the like occur in each thermal power plant of a power system. Factory personnel can not provide on-line power module test, and must return to the factory to check, which is time-consuming and labor-consuming, and has large workload and high cost.
The invention content is as follows:
the utility model aims at providing a distributed control system power module detection device.
The above purpose is realized by the following technical scheme:
a decentralized control system power module detection device, its constitution includes: a 220VAC power supply and a power switch and a voltage regulator are connected in series in a 220VAC power outlet, the voltage regulator is connected in series at one inlet wire power supply of a control cabinet power module of the distributed control system, the control cabinet power module of the distributed control system is connected with a wiring terminal row in a power detection box, and a change-over switch in the power detection box is connected with a universal meter through a wire and an intermediate relay;
the power supply detection box in install first low voltage alarm indicator, second low voltage alarm indicator, change over switch, auxiliary relay, two voltage measurement holes and binding post row, first low voltage alarm indicator and second low voltage alarm indicator pass through the wire and are connected with the binding post row respectively, two voltage measurement holes pass through the wire and are connected with auxiliary relay, auxiliary relay passes through the wire and is connected with the binding post row.
In the distributed control system power module detection device, the No. 3 and No. 4 binding posts of the binding post row receive 48VDC voltage loss alarm output signals of the distributed control system control cabinet power module.
In the distributed control system power module detection device, the No. 5 and No. 6 binding posts of the binding post row receive 24VDC voltage loss alarm output signals of the distributed control system control cabinet power module.
The utility model has the advantages that:
1. the utility model has the characteristics of practice thrift cost, operation facility, show clearly and definitely etc, work efficiency can improve by great degree. The health condition of the power supply modules of the distributed control system is detected in time by using the power supply voltage regulation detection device, and complete and scientific data support is provided for reasonable and orderly replacement of the power supply modules of the distributed control system.
The working principle of the power supply detection box is as follows:
(1) Terminals 1 (A) and 2 (N) of the wiring terminal 4-1 receive an external 220VAC power supply to supply power to the detection box, the low-voltage indicator lamp and the intermediate relay.
(2) 48VDC voltage quality test
The output voltage of the voltage regulator is adjusted to be larger than the specified upper limit value (220VAC + 10%) of the power module, whether the actual measurement value of the voltage of 48VDC is stable or not is checked, and whether large-amplitude fluctuation exists or not is checked; the actual input voltage of 220VAC, the measured voltage value of 48VDC, displayed on the regulator panel at this point is recorded.
And reducing the output voltage of the voltage regulator to be close to the lower limit value (the standard is 220 VAC-10%) specified by the power module until the 48VDC low-voltage alarm contact of the power module is connected, and lighting a 48VDC low-voltage alarm indicator lamp. The detection personnel can record the actual input voltage of 220VAC displayed on the voltage regulator panel at the moment, the actual measurement voltage value when the 48VDC low voltage alarms, and the like; and continuously increasing the output voltage of the regulator until the low-voltage alarm signal of 48VDC disappears, and recording the actual input voltage of 220VAC and the actual voltage value of 48VDC displayed on the voltage regulator panel at the moment.
(3) 24VDC voltage quality test
The output voltage of the voltage regulator is adjusted to be larger than the specified upper limit value (220VAC + 10%) of the power module, whether the actual measurement value of the 24VDC voltage is stable or not is checked, and whether large-amplitude fluctuation exists or not is checked; the actual input voltage of 220VAC, the measured voltage value of 24VDC, displayed on the regulator panel at this point is recorded.
And reducing the output voltage of the voltage regulator to be close to the lower limit value (the standard is 220 VAC-10%) specified by the power module, and lighting the 24VDC low-voltage alarm indicator lamp until the 24VDC low-voltage alarm contact of the power module is connected. The detection personnel can record the actual input voltage of 220VAC displayed on the panel of the voltage regulator at the moment, the actual measurement voltage value when the 24VDC low voltage alarms, and the like; and continuously increasing the output voltage of the regulator until the 24VDC low-voltage alarm signal disappears, and recording the actual input voltage of 220VAC and the actual measured voltage value of 24VDC displayed on the voltage regulator panel at the moment.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic diagram of the power supply detecting box.
Fig. 3 is a schematic diagram of a 24VDC, 48VDC power supply measurement.
Fig. 4 is a schematic diagram of low voltage alarm output of a power module of a Distributed Control System (DCS) control cabinet.
Fig. 5 is a wiring diagram of a power module and a voltage regulator of a Distributed Control System (DCS) control cabinet.
In the figure: 1. the device comprises a 220VAC power supply, 2 power switches and voltage regulators, 3 a distributed control system control cabinet power module, 4 a power detection box, 5 a universal meter, 4-1 a wiring terminal row, 4-2 a first low-voltage (24 VDC) alarm indicator lamp, 4-3 a second low-voltage (48 VDC) alarm indicator lamp, 4-4 a change-over switch, 4-5 an intermediate relay, 4-6 and a voltage measuring hole.
The specific implementation mode is as follows:
example 1:
the utility model provides a distributed control system power module detection device, its constitution includes: 220VAC power, the 220VAC power be qualified for the next round of competitions in and go into switch and voltage regulator, the voltage regulator establish ties in the inlet wire power department of the same way of Distributed Control System (DCS) switch board power module, characterized by: the power supply module of the Distributed Control System (DCS) control cabinet is connected with the wiring terminal row in the power supply detection box, and the change-over switch in the power supply detection box is connected with the universal meter through a wire and an intermediate relay;
the power supply detection box is internally provided with a first low-voltage (24 VDC) alarm indicator lamp 4-2, a second low-voltage (48 VDC) alarm indicator lamp 4-3, a selector switch 4-4, an intermediate relay 4-5, two voltage measurement holes 4-6 and a wiring terminal strip 4-1, wherein the first low-voltage alarm indicator lamp and the second low-voltage alarm indicator lamp are respectively connected with the wiring terminal strip through leads, the two voltage measurement holes are connected with the intermediate relay through leads, and the intermediate relay is connected with the wiring terminal strip through leads.
Example 2:
a two-way redundant 220VAC power supply of a Distributed Control System (DCS) control cabinet is switched off. A voltage regulator of 0V to 250V is connected in series in a first 220VAC power inlet wire of a Distributed Control System (DCS) control cabinet, a panel is provided with pointer scales, the size of output alternating voltage can be recorded in real time, the output voltage of the voltage regulator power supply is adjusted, and the output voltage is gradually increased or decreased to be close to an upper limit value and a lower limit value (220 VAC +/-10%) specified by a power supply module. The power supply detection box receives power supply of a 220VAC power supply, and quality and process duration detection of 24V DC and 48V DC output voltage of the power supply module, low voltage alarm and the like is achieved. The multimeter realizes the measurement and display of real-time values of 24V DC and 48V DC.
Claims (3)
1. A decentralized control system power module detection device, its constitution includes: the 220VAC power, the 220VAC power be qualified for the next round of competitions in string income switch and voltage regulator, the voltage regulator is established ties in the inlet wire power department of the same way of distributed control system's switch board power module, characterized by: the power supply module of the distributed control system control cabinet is connected with the wiring terminal block in the power supply detection box, and the change-over switch in the power supply detection box is connected with the universal meter through a wire and an intermediate relay;
the power supply detection box in install first low voltage alarm indicator, second low voltage alarm indicator, change over switch, auxiliary relay, two voltage measurement holes and binding post row, first low voltage alarm indicator and second low voltage alarm indicator pass through the wire and are connected with the binding post row respectively, two voltage measurement holes pass through the wire and are connected with auxiliary relay, auxiliary relay passes through the wire and is connected with the binding post row.
2. The decentralized control system power module detection device according to claim 1, wherein: no. 3 and No. 4 binding posts of the binding post row receive 48VDC loss voltage alarm output signals of a power module of a distributed control system control cabinet.
3. The decentralized control system power module detection device according to claim 2, wherein: no. 5 and No. 6 binding posts of the binding post row receive 24VDC loss voltage alarm output signals of a power module of a distributed control system control cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223146943.4U CN218886116U (en) | 2022-11-26 | 2022-11-26 | Power module detection device of distributed control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223146943.4U CN218886116U (en) | 2022-11-26 | 2022-11-26 | Power module detection device of distributed control system |
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| Publication Number | Publication Date |
|---|---|
| CN218886116U true CN218886116U (en) | 2023-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223146943.4U Active CN218886116U (en) | 2022-11-26 | 2022-11-26 | Power module detection device of distributed control system |
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| Country | Link |
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| CN (1) | CN218886116U (en) |
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2022
- 2022-11-26 CN CN202223146943.4U patent/CN218886116U/en active Active
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