CN107437848B - System and method for non-signal access of stand-by power supply in monitoring background - Google Patents
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- CN107437848B CN107437848B CN201610871493.5A CN201610871493A CN107437848B CN 107437848 B CN107437848 B CN 107437848B CN 201610871493 A CN201610871493 A CN 201610871493A CN 107437848 B CN107437848 B CN 107437848B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 18
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- 230000011664 signaling Effects 0.000 claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 230000009466 transformation Effects 0.000 abstract description 6
- 238000013461 design Methods 0.000 description 12
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- 230000007547 defect Effects 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 7
- 238000012423 maintenance Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 230000010354 integration Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
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- H02J13/0006—
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
Abstract
The invention provides a system and a method for the non-signal access of a station standby power supply to a monitoring background, wherein an intermediate relay is arranged on a station transformer protection device, a first phase voltage of a station transformer line inlet device is connected with a normally closed contact of the intermediate relay through a voltmeter, when the normally closed contact of the intermediate relay acts, an action signal is generated and sent to a station transformer public measurement and control screen, and then the station transformer public measurement and control screen is sent to the station transformer monitoring background; the station transformer monitoring background sends the action signals to the transformer substation and/or the switch station through the power loss remote signaling contact of the station transformer, and the station transformer monitoring background also sends the action signals to the central monitoring background through the ground control workstation. The power-off signal and/or the power-on signal of the station power supply are/is connected to the background monitoring host, so that whether the station transformer is in normal electrified operation state or not is ensured to be timely informed to a power transformation set monitoring center operator; and the investment is saved, the method is economical and feasible, and the method has a good popularization prospect.
Description
Technical Field
The invention relates to the technical field of power supply monitoring, in particular to a system and a method for non-signal access of a station standby power supply in a monitoring background.
Background
Under the western high-altitude and high-humidity environment, a station transformer of a transformer substation is used as a standby power supply in some regional power grids, and when the total station is in voltage loss, the regional power grid is the only power supply guarantee of a standby power supply system for the station. In a background monitoring machine of a transformer substation, because no four-remote signal of a substation transformer exists, the monitoring method can only be manual inspection, when the substation transformer is lost and power is recovered, the substation monitoring background cannot monitor the substation transformer in real time, a centralized monitoring center only calls field watchers and field maintenance staff arrive at a substation transformer line screen to check the indication of a voltmeter to confirm, the method delays time, and when a standby power supply system for the substation loses real-time monitoring, the safe and stable operation of the transformer substation is greatly damaged.
Disclosure of Invention
In order to better ensure the safe and stable operation of the transformer substation, the operation management mode of all the transformer (switch) stations in the regional power grid is changed from the original management mode of 'manned duty' to the management mode of 'unmanned duty and unattended' through integrated monitoring and maintenance integrated construction, and all transformer operation monitoring tasks are integrally and intensively completed by an integration and monitoring center. The system can provide reliable information guarantee for monitoring of on-duty personnel of a centralized monitoring center, and comprehensively implements technical access to a background of a centralized control and monitoring integrated monitoring system aiming at the problem that a standby power supply for 2 220kV transformer substations or similar transformer substations and switching stations 10kV stations has no signal access to the system.
The invention aims to provide a system and a method for the non-signal access of a station standby power supply to a monitoring background, and aims to solve the defect that the existing station variable power supply is designed to be in non-signal access to the operation of a substation background and a centralized monitoring center.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a stand-by power supply is at no signal access system of control backstage, includes that intermediate relay, station lose electric remote signaling contact with the power, wherein:
the intermediate relay is arranged on the station transformer protection device; a first phase voltage of the station transformer line device is connected with a normally closed contact of the intermediate relay through a voltmeter; the intermediate relay is also connected with a pair of terminals on the station transformer public measurement and control screen;
the power-off remote signaling contact of the power supply for the station is arranged in a transformer monitoring background for the station;
in the working state:
when the normally closed contact of the intermediate relay acts, an action signal is generated and sent to the station transformer substation common measurement and control screen, and then the station transformer substation common measurement and control screen is sent to the station transformer substation monitoring background;
the station transformer monitoring background sends the action signals to the transformer substation and/or the switch station through the power loss remote signaling contact of the station transformer, and the station transformer monitoring background also sends the action signals to the central monitoring background through the ground control workstation.
On the basis of the above embodiment, further, the action signal includes a power-off signal and/or a power-on signal.
On the basis of any of the above embodiments, further, the intermediate relay is a 3TH42 type intermediate relay.
A method for monitoring background non-signal access of a stand-by power supply by using any one of the systems comprises the following steps:
when the normally closed contact of the intermediate relay acts, an action signal is generated and sent to the station transformer substation common measurement and control screen, and then the station transformer substation common measurement and control screen is sent to the station transformer substation monitoring background;
the station transformer monitoring background transmits the action signal to the transformer substation through the power loss remote signaling contact of the station transformer, and transmits the action signal to the central monitoring background through the ground control workstation; and the central monitoring background sends the action signal to the switching station.
The invention has the beneficial effects that:
the invention provides a station standby power supply non-signal access system and a method in a monitoring background, wherein an intermediate relay is arranged on a station transformer protection device, a first phase voltage of a station transformer wire inlet device is connected with a normally closed contact of the intermediate relay through a voltmeter, when a voltage is applied to a relay coil and is equal to or greater than an action voltage, an armature is attracted to an iron core by electromagnetic attraction, a contact piece is pushed by an armature top plate, a contact is connected with a normally open contact, the normally closed contact is disconnected, or a controlled circuit is converted; when the relay coil is de-energized or the voltage drops below the return voltage, the armature returns to the original position under the contact tab. Aiming at the defect situation that no signal is accessed to the operation of a transformer substation background and a centralized monitoring center in the design of a substation power supply, the invention combines the actual situation of the defect of design configuration, and by adopting technical innovation and improvement measures, the power-off signal and/or the power-on signal of the substation power supply are/is accessed to a background monitoring host, so that whether the substation power supply is in a normal electrified operation state or not is ensured to be informed to a substation centralized monitoring center operator for timely processing; the technology is adopted to innovate the achievement treatment, the investment is saved, the technology is economical and feasible, the popularization prospect is good, and good social and economic benefits can be obtained.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a flowchart illustrating a method for monitoring background no-signal access of a station standby power supply according to an embodiment of the present invention;
fig. 2 shows a secondary schematic diagram of a method for monitoring background no-signal access of a station standby power supply according to an embodiment of the present invention.
In the figure, 1F, 2F, and 3F are power source side fuse fuses, V is a voltmeter, ZJ is an intermediate relay, CK is a terminal normally-open point and a terminal post, a1 is a first phase voltage, B1 is a second phase voltage, and C1 is a third phase voltage.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
Detailed description of the preferred embodiment
The embodiment of the invention provides a station standby power supply non-signal access system in a monitoring background, which comprises an intermediate relay and a station power supply power-off remote signaling contact, wherein the intermediate relay comprises:
the intermediate relay is arranged on the station transformer protection device; a first phase voltage of the station transformer line device is connected with a normally closed contact of the intermediate relay through a voltmeter; the intermediate relay is also connected with a pair of terminals on the station transformer public measurement and control screen;
the power-off remote signaling contact of the power supply for the station is arranged in a transformer monitoring background for the station;
in the working state:
when the normally closed contact of the intermediate relay acts, an action signal is generated and sent to the station transformer substation common measurement and control screen, and then the station transformer substation common measurement and control screen is sent to the station transformer substation monitoring background;
the station transformer monitoring background sends the action signals to the transformer substation and/or the switch station through the power loss remote signaling contact of the station transformer, and the station transformer monitoring background also sends the action signals to the central monitoring background through the ground control workstation.
In the embodiment of the invention, the intermediate relay is arranged on the station transformer protection device, the first phase voltage of the station transformer wire inlet device is connected with the normally closed contact of the intermediate relay through the voltmeter, when the voltage applied to the relay coil is equal to or greater than the action voltage, the armature is attracted to the iron core by the electromagnetic attraction force, and the contact piece is pushed by the armature top plate to switch on the normally open contact, switch off the normally closed contact or switch the controlled circuit; when the relay coil is de-energized or the voltage drops below the return voltage, the armature returns to the original position under the contact tab. Aiming at the defect situation that no signal is accessed to the operation of a transformer substation background and a centralized monitoring center in the design of a substation power supply, the embodiment of the invention combines the actual situation of the defect of design configuration, and accesses a power-off signal and/or a power-on signal of the substation power supply to a background monitoring host through technical innovation and improvement measures, so as to ensure that whether the substation power supply is in a normal electrified operation state or not is informed to a substation centralized monitoring center operator for timely processing; the technology is adopted to innovate the achievement treatment, the investment is saved, the technology is economical and feasible, the popularization prospect is good, and good social and economic benefits can be obtained.
In the embodiment of the present invention, the action signal is not limited, and may be a power-off signal or a power-on signal, and on the basis of the above embodiment, preferably, the action signal may include a power-off signal and/or a power-on signal.
In the embodiment of the present invention, the intermediate relay is not limited, and on the basis of any of the above embodiments, preferably, the intermediate relay may be a 3TH42 type intermediate relay. The relay of the type has flexible action mechanism, convenient manual inspection and compact structural design, can prevent external sundries and dust from falling into the movable part of the relay, and the wiring end is covered by a cover, so that hands can not directly contact the electrified part, and the safety protection is very high; the relay has the advantages of compact size, small installation area, firm installation mode by using screws, and quick and convenient assembly and disassembly by being buckled on a standard guide rail with the width of 35 mm; the contact is in a bridge type double-breakpoint structure, the contact material is made of silver alloy with excellent electrical property, the service life is long, the contact reliability is good, the arc extinguish chambers are all closed, and the flame retardant material blocks the electric arc from splashing outwards, so that the safety of a person and adjacent electric appliances is ensured; the relay electromagnet has reliable work, low loss, low noise and high mechanical strength, the wiring end of the coil is provided with the voltage specification signboard, the signboard is in a special color according to the voltage grade, the color is clear and striking, the field operation wiring is convenient, the coil can be prevented from being burnt due to wrong voltage specification connection, and the safety of the system is improved.
Detailed description of the invention
As shown in fig. 1, a method for monitoring background no-signal access of a station standby power supply using a system according to any one of the first embodiment includes:
when the normally closed contact of the intermediate relay acts, an action signal is generated and sent to the station transformer substation common measurement and control screen, and then the station transformer substation common measurement and control screen is sent to the station transformer substation monitoring background;
the station transformer monitoring background transmits the action signal to the transformer substation through the power loss remote signaling contact of the station transformer, and transmits the action signal to the central monitoring background through the ground control workstation; and the central monitoring background sends the action signal to the switching station.
In the embodiment of the invention, the intermediate relay is arranged on the station transformer protection device, the first phase voltage of the station transformer wire inlet device is connected with the normally closed contact of the intermediate relay through the voltmeter, when the voltage applied to the relay coil is equal to or greater than the action voltage, the armature is attracted to the iron core by the electromagnetic attraction force, and the contact piece is pushed by the armature top plate to switch on the normally open contact, switch off the normally closed contact or switch the controlled circuit; when the relay coil is de-energized or the voltage drops below the return voltage, the armature returns to the original position under the contact tab. Aiming at the defect situation that no signal is accessed to the operation of a transformer substation background and a centralized monitoring center in the design of a substation power supply, the embodiment of the invention combines the actual situation of the defect of design configuration, and accesses a power-off signal and/or a power-on signal of the substation power supply to a background monitoring host through technical innovation and improvement measures, so as to ensure that whether the substation power supply is in a normal electrified operation state or not is informed to a substation centralized monitoring center operator for timely processing; the technology is adopted to innovate the achievement treatment, the investment is saved, the technology is economical and feasible, the popularization prospect is good, and good social and economic benefits can be obtained.
Detailed description of the preferred embodiment
In a regional power grid, a transformer for a 2-220 kV transformer substation 10kV station is used as a standby power supply, fig. 2 provides a secondary schematic diagram of a method for monitoring background no-signal access of the standby power supply for the station, and as shown in fig. 2, fusing fuses 1F, 2F and 3F on a power supply side are respectively arranged on a first phase voltage A1, a second phase voltage B1 and a third phase voltage C1;
in the embodiment of the invention, a 3TH42 type intermediate relay ZJ is additionally arranged on a 2-seat transformer power cabinet for a 220kV to 10kV station; increasing a power loss remote signaling contact for a station in a 2-seat 220kV power loss background monitoring system;
the intermediate relay ZJ is arranged on the station transformer protection device; the first phase voltage A1 and the second phase voltage B1 of the station transformer wire inlet device can be connected with a voltmeter V and a normally closed contact of an intermediate relay ZJ through a terminal normally open point and a terminal CK, and the first phase voltage A1 and the third phase voltage C1 of the station transformer wire inlet device can be connected with the intermediate relay ZJ through the terminal normally open point and the terminal CK; the intermediate relay ZJ is also connected with a pair of terminals on the station transformer public measurement and control screen;
the power-off remote signaling contact of the power supply for the station is arranged in a transformer monitoring background for the station;
the working principle of the intermediate relay is as follows: when voltage is applied to the intermediate relay ZJ coil and is equal to or greater than action voltage, the armature is attracted to the iron core by electromagnetic attraction, the contact piece is pushed by the armature top plate, the contact is connected (normally open contact), disconnected (normally closed contact) or switched to a controlled circuit, and when the relay ZJ coil is disconnected or the voltage is reduced to be less than return voltage, the armature returns to the original position under the action of the contact piece;
a power loss remote signaling contact for the station is added in a 2-seat 220kV power loss background monitoring system and is transmitted to a monitoring center through a ground transfer table; when the 10kV station transformer loses power, the coil loses power, the loop from the public measurement and control screen to the intermediate relay is closed, and a '10 kV station transformer loss power' signal is sent out, otherwise, a '10 kV station transformer loss power' reset signal is sent out. The transformer substation background monitor is connected to the transformer substation background monitor through 2 220kV transformer substation power utilization non-signal, configuration wiring processing is added through technical innovation design, and no matter the transformer substation 10kV transformer substation is with losing power or repowering, the transformer substation background monitor and the monitoring center monitor can signal.
In the embodiment of the invention, in a high-altitude area at the position of the 2 220kV transformer station, the mountaintops of surrounding mountainous areas are always accumulated with snow, an intermediate relay with excellent long-term severe environment resistance, stable electric contact, reliability and load switching capacity (not influenced by external weather environment) is selected, and in the embodiment of the invention, a Siemens 3TH42 type intermediate relay can be adopted.
With the comprehensive realization of the integration of power transformation regulation and collection monitoring and maintenance of the regional power grid, all 220kV transformer substations, 110kV transformer (switch) stations and 35kV transformer substation operation management are switched to an unattended and unattended mode; in the 10kV station standby power supply of the original power transformation (switching) station, design defects similar to that 2 220kV stations are switched into 10kV stations without signals to be connected into a transformer substation background and a monitoring center are more; the method has the advantages of low investment and good effect. Aiming at the achievement implementation investment benefit of the technical innovation problem, the main component materials are as follows: only purchasing a 3TH42 type intermediate relay, wherein the cable refers to a standby core wire in the original cable, and the software refers to the original background software of the transformer substation; the working hours of the electric technology of the field operation of each transformer substation are 8, and the total cost investment is about 3000 yuan; the investment amount processed by other methods is dozens of ten thousand yuan or even millions of yuan, so the adoption of the technical innovation result has excellent investment economic benefit.
Through the organization implementation of the technical innovation achievement, 2 220kV transformer stations and 10kV transformer stations are connected to a background monitor in a non-signal mode for alarm display, and the improved technical innovation 9 is that the 2 kV transformer stations and 10kV transformer stations are connected to the background monitor in a non-signal mode for alarm signal display, so that whether the power supply for the substation standby station is in a voltage loss state or not is achieved, and the 2 kV transformer stations and the monitor which integrates transformer control, transformer regulation, collection, monitoring, inspection and maintenance are provided with obvious alarm display. Under the management mode that the integrated power transformation operation of regulation, control, collection, monitoring and maintenance is turned to unattended operation and less watching, the reliability of the power supply for the 10kV substation with 2 220kV transformers is greatly improved, and the safe, economic, reliable and stable operation of the regional power grid is guaranteed to play important social benefits.
The integration of power transformation regulation and control and integrated monitoring and maintenance is realized along with the regional power grid, and the power transformation operation is completely changed to an unattended and unattended management mode from an original conventional manned management mode; however, in the original standby power supplies for 10kV stations of 220kV transformer substations, 110kV transformer (switch) stations and 35kV transformer substations, 2 transformers for 220kV to 10kV stations are similar, and the situation of operation defects of a background and a centralized monitoring center of a transformer substation without signal access is common in design; the technical innovation achievement is adopted to treat similar problems, the investment of design topics is saved, and good social and economic benefits can be obtained; therefore, the achievement of the technical innovation topic has better popularization value for the transformer substation with similar design defects in the regional power grid, has better popularization and application value for the standby power supply for the 10kV transformer substation in the national range, and makes certain contribution to the ideal intelligent power grid construction in the future.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. Although the present invention has been described to a certain extent, it is apparent that appropriate changes in the respective conditions may be made without departing from the spirit and scope of the present invention. It is to be understood that the invention is not limited to the described embodiments, but is to be accorded the scope consistent with the claims, including equivalents of each element described.
Claims (3)
1. The utility model provides a stand-by power supply is at control backstage no signal access system, its characterized in that, is with power loss remote signaling contact including auxiliary relay, station, wherein:
the intermediate relay is arranged on the station transformer protection device; a first phase voltage of the station transformer line device is connected with a normally closed contact of the intermediate relay through a voltmeter; the intermediate relay is also connected with a pair of terminals on the station transformer public measurement and control screen; when the voltage applied to the coil of the intermediate relay is equal to or greater than the action voltage, the armature is attracted to the iron core by electromagnetic attraction, and the contact is switched on the normally open contact and the normally closed contact or a controlled circuit is switched under the pushing of the contact piece on the top plate of the armature; when the relay coil is powered off or the voltage is reduced to be less than the return voltage, the armature returns to the original position under the action of the contact piece;
the power-off remote signaling contact of the power supply for the station is arranged in a transformer monitoring background for the station;
in the working state:
when the normally closed contact of the intermediate relay acts, an action signal is generated and sent to the station transformer substation common measurement and control screen, and then the station transformer substation common measurement and control screen is sent to the station transformer substation monitoring background;
the station transformer monitoring background sends the action signal to a transformer substation and/or a switching station through a station power supply power-off remote signaling contact, and the station transformer monitoring background also sends the action signal to a central monitoring background through a ground controller workstation; wherein
The action signal comprises a power-off signal and/or a power-on signal.
2. The station backup power supply no-signal access system in monitoring background of claim 1, wherein said intermediate relay is 3TH42 type intermediate relay.
3. A method for monitoring background no-signal access by a station backup power supply using the system of any one of claims 1-2, comprising:
when the normally closed contact of the intermediate relay acts, an action signal is generated and sent to the station transformer substation common measurement and control screen, and then the station transformer substation common measurement and control screen is sent to the station transformer substation monitoring background;
the station transformer monitoring background transmits the action signal to the transformer substation through the power loss remote signaling contact of the station transformer, and transmits the action signal to the central monitoring background through the ground control workstation; and the central monitoring background sends the action signal to the switching station.
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| CN108873812A (en) * | 2018-06-22 | 2018-11-23 | 西安飞机工业（集团）有限责任公司 | A kind of power supply system flash monitoring method |
| CN110994792B (en) * | 2019-12-05 | 2023-08-04 | 广东电网有限责任公司 | System for detecting signal during power grid equipment power restoration |
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| CN202351362U (en) * | 2011-11-24 | 2012-07-25 | 山东电力集团公司济南供电公司 | Breakage real-time alarm device for station transformer |
| CN204046139U (en) * | 2014-08-18 | 2014-12-24 | 国家电网公司 | There is the station local coordinate frame shunting switch protective device of tripping operation measuring ability |
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| US7216043B2 (en) * | 1997-02-12 | 2007-05-08 | Power Measurement Ltd. | Push communications architecture for intelligent electronic devices |
| CN204881911U (en) * | 2015-04-29 | 2015-12-16 | 中国电力科学研究院 | Wireless monitoring and early warning device of sleeve pipe in transformer substation |
| CN105375635B (en) * | 2015-12-02 | 2017-11-07 | 国家电网公司 | Power distribution network cascades switching station's intelligent management and system |
| CN105406489A (en) * | 2015-12-22 | 2016-03-16 | 无锡市锡容电力电器有限公司 | Protection apparatus for grouping automatic switching compensation cabinet |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202351362U (en) * | 2011-11-24 | 2012-07-25 | 山东电力集团公司济南供电公司 | Breakage real-time alarm device for station transformer |
| CN204046139U (en) * | 2014-08-18 | 2014-12-24 | 国家电网公司 | There is the station local coordinate frame shunting switch protective device of tripping operation measuring ability |
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Effective date of registration: 20211015 Address after: 673199 Nujiang Avenue, laimao New District, Liuku Town, Lushui City, Nujiang Lisu Autonomous Prefecture, Yunnan Province Patentee after: NUJIANG POWER SUPPLY BUREAU OF YUNNAN POWER GRID Co.,Ltd. Address before: 673100 Nujiang Power Supply Bureau of Yunnan Power Grid Co., Ltd. beside 40m Avenue, Xincheng District, Liuku Town, Lushui City, Nujiang Prefecture, Yunnan Province Patentee before: Xiong Yunkang |