CN210074873U - Portable direct-current power supply system with insulation monitoring function - Google Patents
Portable direct-current power supply system with insulation monitoring function Download PDFInfo
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- CN210074873U CN210074873U CN201920266054.0U CN201920266054U CN210074873U CN 210074873 U CN210074873 U CN 210074873U CN 201920266054 U CN201920266054 U CN 201920266054U CN 210074873 U CN210074873 U CN 210074873U
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Abstract
The utility model discloses a portable DC power supply system of insulating monitoring function in area, including overhauing alternating current power supply, rectifier module, insulating monitoring module and warning display module, rectifier module is single-phase bridge rectifier circuit, insulating monitoring module is the balanced bridge circuit of direct current, it is the load alarm to report an emergency and ask for help or increased vigilance display module, overhaul alternating current power supply, rectifier module and insulating monitoring module form the major loop, rectifier module exports to insulating monitoring module after will overhauing the alternating current power supply rectification for direct current, insulating monitoring module one end ground connection, warning display module is connected to insulating monitoring module's earthing terminal, the load alarm is lighted when warning display module surpasss the load. The utility model discloses select suitable rectifier circuit, utilize the balanced bridge principle of insulation monitoring module to detect power ground connection situation, balanced bridge method is simple and easy, and the wide application can guarantee that system's direct current ground fault monitoring rate is more than 98%.
Description
Technical Field
The utility model relates to a transformer substation specifically is portable DC power supply system who takes insulation monitoring function with supporting device field.
Background
In the new construction and the reconstruction and extension engineering of the transformer substation, a direct-current power supply is inevitably used in the installation and debugging process of secondary equipment in the substation. However, only an alternating current power supply is conveniently acquired on the engineering site, and a convenient direct current power supply acquisition way is not available. The method used by the current construction unit is as follows:
(1) obtaining from a test power supply screen in the slave station: however, in actual work, the following problems are found in this way:
1. the 220kV substation is equipped with a test power screen, while the 110kV substation is not equipped with a test power screen.
2. The direct current power supply on the test power supply screen does not have an insulation monitoring function, cannot reflect the earth potential of the anode and the cathode, and cannot monitor the grounding condition of the direct current load in real time. When or after the direct-current cable is lapped with an operating direct-current screen, direct-current grounding is often encountered, and the direct-current grounding at multiple positions of the system can cause misoperation of a circuit breaker, so that the safety of direct-current power utilization can not be obviously guaranteed, and meanwhile, the direct-current cable is a serious potential safety hazard for operating equipment.
3. The distance between the test power supply screen and the direct-current electric equipment can be far, and even the test power supply screen and the direct-current electric equipment are arranged on different floors, so temporary cables need to be laid. The phenomena of temporary cable breakage, burning and short circuit occur at times, which undoubtedly increases the potential safety hazard and workload of site construction.
(2) Lapping from the running DC screen: however, in actual work, the following problems are found in this way:
1. according to the relevant provisions of the Power transformation part book 12.4.2.2, the Manual of standardized construction work of Power Transmission and transformation engineering of State grid and Power grid company. The untuned equipment is not allowed to be accessed to a normally operated direct current power supply system.
2. If the direct current power supply system which is running is connected, when the test equipment has a direct current ground fault, the normal running of the running equipment can be influenced, the equipment which is running is more likely to malfunction, and the potential safety hazard is more serious.
3. The constructor of the capital construction unit has no right to operate the equipment in operation, and needs to be matched with the operation and maintenance unit if the power supply needs to be accessed from the direct current screen. Meanwhile, the direct current screen is complex in wiring and various in idle opening, and risks of 'misconnection', 'mispulling' and the like exist.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a portable DC power supply system of insulating monitor function in area to solve the problem that provides among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: take portable DC power supply system of insulation monitoring function, including overhauing alternating current power supply, the rectifier module, insulation monitoring module and warning display module, the rectifier module is single-phase bridge rectifier circuit, insulation monitoring module is the balanced bridge circuit of direct current, warning display module is load alarm, overhaul alternating current power supply, rectifier module and insulation monitoring module form the major loop, rectifier module exports to insulation monitoring module after will overhauing alternating current power supply rectification for direct current, insulation monitoring module one end ground connection, insulation monitoring module's earthing terminal is connected and is reported an emergency and asked for help or increased vigilance display module, load alarm lights when reporting an emergency and asking for help or increased vigilance display module and surpassing the load.
Preferably, the rectifying module is provided with a multi-gear adjusting load.
Preferably, the rectifier module is further provided with a heat radiation fan.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses borrow for reference transformer substation alternating current-direct current system design thought, utilize rectifier module to overhaul in the slave station and acquire DC power supply on the AC power supply, select suitable rectifier circuit, guarantee that output direct current error control is within 5%, simultaneously in order to detect the insulating situation of the direct current system that connects, utilize the balanced bridge principle of insulating monitoring module to detect power ground connection situation, balanced bridge method is simple and easy, wide application, can guarantee that system's direct current ground fault monitoring rate is more than 98%, and the device size is small and exquisite moreover, and is light, it is also more convenient to use.
Drawings
Fig. 1 is the overall block diagram of the system of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: take portable DC power supply system of insulation monitoring function, including overhauing alternating current power supply, the rectifier module, insulation monitoring module and warning display module, the rectifier module is single-phase bridge rectifier circuit, insulation monitoring module is the balanced bridge circuit of direct current, warning display module is load alarm, overhaul alternating current power supply, rectifier module and insulation monitoring module form the major loop, rectifier module exports to insulation monitoring module after will overhauing alternating current power supply rectification for direct current, insulation monitoring module one end ground connection, insulation monitoring module's earthing terminal is connected and is reported an emergency and asked for help or increased vigilance display module, load alarm lights when reporting an emergency and asking for help or increased vigilance display module and surpassing the load.
And a multi-gear adjusting load is arranged in the rectifying module.
A heat radiation fan is also arranged in the rectification module.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. Take portable DC power supply system of insulation monitoring function, including overhauing alternating current power supply, transformer substation, its characterized in that: still include rectifier module, insulating monitoring module and report an emergency and ask for help or increased vigilance display module, rectifier module is single-phase bridge rectifier circuit, insulating monitoring module is direct current balance bridge circuit, report an emergency and ask for help or increased vigilance display module for the load alarm, utilize rectifier module to follow acquire DC power supply on the maintenance AC power supply in the transformer substation, maintenance AC power supply, rectifier module and insulating monitoring module form the major loop, rectifier module exports to insulating monitoring module after will overhauing the AC power supply rectification for DC current, insulating monitoring module one end ground connection, the earthing terminal of insulating monitoring module is connected and is reported an emergency and ask for help or increased vigilance display module, it lights to report an emergency and ask for help or increased vigilance display.
2. The portable direct-current power supply system with insulation monitoring function according to claim 1, characterized in that: and a multi-gear adjusting load is arranged in the rectifying module.
3. The portable direct-current power supply system with insulation monitoring function according to claim 1, characterized in that: and a heat radiation fan is also arranged in the rectification module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920266054.0U CN210074873U (en) | 2019-03-04 | 2019-03-04 | Portable direct-current power supply system with insulation monitoring function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920266054.0U CN210074873U (en) | 2019-03-04 | 2019-03-04 | Portable direct-current power supply system with insulation monitoring function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210074873U true CN210074873U (en) | 2020-02-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920266054.0U Expired - Fee Related CN210074873U (en) | 2019-03-04 | 2019-03-04 | Portable direct-current power supply system with insulation monitoring function |
Country Status (1)
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| CN (1) | CN210074873U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740756A (en) * | 2021-07-30 | 2021-12-03 | 中国南方电网有限责任公司超高压输电公司广州局 | Fault monitoring device, power supply state monitoring method and direct-current test power supply |
-
2019
- 2019-03-04 CN CN201920266054.0U patent/CN210074873U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740756A (en) * | 2021-07-30 | 2021-12-03 | 中国南方电网有限责任公司超高压输电公司广州局 | Fault monitoring device, power supply state monitoring method and direct-current test power supply |
| CN113740756B (en) * | 2021-07-30 | 2024-04-26 | 中国南方电网有限责任公司超高压输电公司广州局 | Fault monitoring device, power state monitoring method and direct current test power supply |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200214 Termination date: 20210304 |
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| CF01 | Termination of patent right due to non-payment of annual fee |