CN111786459A - Distribution substation monitoring practical method based on distribution network system - Google Patents

Distribution substation monitoring practical method based on distribution network system Download PDF

Info

Publication number
CN111786459A
CN111786459A CN202010583692.2A CN202010583692A CN111786459A CN 111786459 A CN111786459 A CN 111786459A CN 202010583692 A CN202010583692 A CN 202010583692A CN 111786459 A CN111786459 A CN 111786459A
Authority
CN
China
Prior art keywords
distribution
network system
distribution network
data
substation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010583692.2A
Other languages
Chinese (zh)
Inventor
江泓
唐晓艳
王碧香
庄志伟
陈文君
谢乾武
陈婉莹
吕国曙
牛勇
陈万全
魏接龙
覃炎洁
严亮亮
王敏
李建洋
黄定兵
邹晓明
程颖
李旭伟
刘桂红
傅琦
张礼嘉
陈颖初
周芬
朱潇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Fujian Electric Power Co Ltd
Nanping Power Supply Co of State Grid Fujian Electric Power Co Ltd
Pucheng Power Supply Co of State Grid Fujian Electric Power Co Ltd
Original Assignee
State Grid Fujian Electric Power Co Ltd
Nanping Power Supply Co of State Grid Fujian Electric Power Co Ltd
Pucheng Power Supply Co of State Grid Fujian Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Fujian Electric Power Co Ltd, Nanping Power Supply Co of State Grid Fujian Electric Power Co Ltd, Pucheng Power Supply Co of State Grid Fujian Electric Power Co Ltd filed Critical State Grid Fujian Electric Power Co Ltd
Priority to CN202010583692.2A priority Critical patent/CN111786459A/en
Publication of CN111786459A publication Critical patent/CN111786459A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00001Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00002Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00032Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
    • H02J13/00034Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving an electric power substation
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2213/00Indexing scheme relating to details of circuit arrangements for providing remote indication of network conditions of for circuit arrangements for providing remote control of switching means in a power distribution network
    • H02J2213/10Indexing scheme relating to details of circuit arrangements for providing remote indication of network conditions of for circuit arrangements for providing remote control of switching means in a power distribution network using simultaneously two or more different transmission means
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/16Electric power substations
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S40/00Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S40/00Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/126Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission

Abstract

The invention relates to a practical monitoring method for a distribution substation based on a distribution network system. At a distribution substation end, a single main transformer is additionally provided with a triangular coil PT with an opening on a bus to obtain zero sequence voltage, the condition of sending out the out-of-limit action remote signaling signals is triggered by using 10V as a 3U0 numerical value, the out-of-limit action remote signaling signals are linked with an analog switch, when the out-of-limit action remote signaling signals appear, the analog switch keeps sending out the opening remote signaling signals, and the loss-of-place monitoring is realized by combining a distribution network system research and judgment bullet window principle and setting in a distribution network system database; and at the master station end, a distribution network system database is improved, and the display and remote control on the distribution network system are realized by acquiring the position signals and the oil temperature data of the main transformer tap on site. The invention can be applied to distribution transformer substations in different stages, fully exerts the effect of distribution transformer, and has popularization and application values.

Description

Distribution substation monitoring practical method based on distribution network system
Technical Field
The invention relates to a practical monitoring method for a distribution substation based on a distribution network system.
Background
Compared with a conventional transformer substation, the distribution transformer substation lacks a protection signal uploading scheme, and has no management control scheme after the construction of multi-place distribution transformer substations since the popularization and construction. After construction, protection signals do not need to be sent upwards, a three-remote switch is only installed at the position of a No. 1 pole of a 10kV outgoing line and is controlled in a distribution network system, only one in-station wiring diagram which is not connected with four-remote information is reserved in a main network system in power grid dispatching, and the protection monitoring function is lost. The power grid dispatching system is divided into main grid dispatching and distribution network dispatching, various protection functions of the distribution substation are lost, and in order to meet the requirement of power grid information safety, the Fujian province power company determines that the distribution substation is not allowed to be connected into the main grid system for monitoring, so that the connection monitoring mechanism is blank, and in the operation of a power grid, the dispatching is only taken as an emergency standby measure, and the utilization rate is extremely low.
The practical monitoring technology for the distribution transformer substation of the distribution network system closest to other industries is as follows:
at present, only conventional transformer substations in the industry are accessed to a main grid system for power grid dispatching, and a mature and reliable method is provided, and power distribution transformer substation is not allowed to be accessed to the main grid system due to the requirement of power grid information safety access. The domestic known power grid company does not have a mature and reliable practical scheme for access monitoring of the distribution substation and a patent for effectively protecting the practical method for applying the practical scheme to the access monitoring of the distribution substation.
The prior art has the following defects:
the current distribution substation scheme of the power grid system has the following defects: 1. the function of transmitting protection signals is not provided, the protection signals are only used as emergency standby measures and are applied in power conversion, and the utilization rate is extremely low; 2. when a distribution substation runs, if an outgoing line is out of the ground, scheduling cannot be monitored, and potential safety hazards exist in case that personnel pass through; 3. only installing three remote switches on each 10kV outgoing line #1 rod, and keeping the three remote switches in an uncontrolled state without a method for controlling equipment in a station; 4. the voltage cannot be regulated, and a means for ensuring the quality of electric energy is lacked for power supply users; 5. the scheme of no upper signal transmission does not meet the requirement of signal access, and the national network company requires that the transformer substation information must meet the requirement of network safety protection, which belongs to the management blank; 6. the functions of the distribution transformer substation cannot be fully exerted, and if a mature scheme is adopted, the distribution transformer substation has the advantages of short construction period, quick response, small occupied area, small investment and the like after being popularized.
For this reason, this application is based on distribution network system, utilizes distribution network system control 10kV to join in marriage the function of net twine way equipment, through station, county transfer, the transformation of transfer end, realizes that one set of practical 35kV distribution substation that can popularize inserts, the generating line loses the ground control, total station equipment remote control, network information safety protection, the main ripe practical scheme that becomes to have the voltage regulation, the visual ripe of oil temperature gear, and complete set of scheme contains 5 schemes stage by stage, is suitable for the distribution substation application that each place is in different stage condition.
Disclosure of Invention
The invention aims to provide a practical distribution substation monitoring method based on a distribution network system, which is suitable for distribution substations in different stages, can fully play the role of distribution substation and has popularization and application values.
In order to achieve the purpose, the technical scheme of the invention is as follows: a practical method for monitoring a distribution substation based on a distribution network system is characterized in that at a distribution substation end, a single main transformer is additionally provided with a triangular coil PT with an opening on a bus to obtain zero sequence voltage, the numerical value of 3U0 with 10V is used for triggering and sending out an over-limit action remote signaling signal condition, the over-limit action remote signaling signal is linked with an analog switch, when the over-limit action remote signaling signal appears, the analog switch keeps sending up a separating brake remote signaling signal, and the principle of a bullet window study and judgment of the distribution network system is combined, and the loss-of-place monitoring is realized by setting a distribution network system database; and at the master station end, a distribution network system database is improved, and the display and remote control on the distribution network system are realized by acquiring the position signals and the oil temperature data of the main transformer tap on site.
In an embodiment of the invention, an optical terminal is installed in a distribution substation to a county level, an independent optical communication device is additionally installed in the county level, data is uploaded to a local level, the local level is additionally provided with a deployment network security access area, and the data is transmitted to a distribution network system server for processing.
In an embodiment of the present invention, the county-level call and the local call for uploading data are realized by using a dedicated VPN network segment channel of an operator through a DTU device.
In an embodiment of the invention, the county tone sends data to the local tone, and the wired transmission of the data is realized through the established wired architecture network from the county tone to the local tone.
In an embodiment of the invention, four-remote information acquired by a plurality of main transformers is gathered to one DTU through a network cable led out by a concentrator and processed together, and data uploading is realized by utilizing a special VPN network segment channel for electric power of an operator.
Compared with the prior art, the invention has the following beneficial effects: the invention can realize the mature and practical scheme of four-remote signal access, bus grounding monitoring, total station equipment remote control, network information safety protection, main transformer on-load voltage regulation and visible oil temperature gears for the 35kV distribution substation through a distribution network system. The method specifically comprises the following steps:
1. the scheme of '1.0 wireless access stage': the most economical and rapid production on-line of the power distribution transformer can be realized, and the most basic safety monitoring use requirement is realized.
2. The "2.0 wired access phase" scheme: the power distribution transformer can be more economically and stably on-line, the most basic safety monitoring use requirement is realized, and the power distribution transformer is suitable for power enterprises with low network information safety protection requirements.
3. The '3.0 deep application stage' scheme: the distribution transformer substation has the key functions of flexible voltage regulation, important information display and the like on the aspect of safety monitoring and use requirements, can fully play the function of distribution transformer, and has good economic and social values.
4. The scheme of the 4.0 safety protection lifting stage is as follows: the investment is large, various functions of the power distribution transformer can be stable, safe and reliable, the network security attack can be resisted, and the security of the security I area is not influenced.
5. The "5.0 Capacity expansion application phase" scheme. The transformation investment of the power distribution transformer is minimized, the functional requirements of increasing a plurality of main transformers and expanding capacity are realized, and the functional value of the power distribution transformer substation is obviously improved.
The scheme fills a blank management and control scheme for the application of the distribution transformer substation, is suitable for realizing the management and control of the distribution transformer substation on the basis of respective distribution network systems of all network provinces and companies, and 5 staged improvement schemes are suitable for most power grid companies on the basis of self construction conditions, so that all power grid companies can adopt popularization as required. This patent will can impel the practical function of distribution transformer substation greatly, if the distribution transformer substation promotes on a large scale, will reduce the transformation time limit for a project, reduces the electric wire netting investment and plays the important role, will be most economical, the electric energy quality of efficient promotion part electric wire netting.
Drawings
Fig. 1 is a schematic diagram of a switch for implementing a visual ground fault judging function in a "1.0 wireless access phase" scheme according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of the "2.0 wired access phase" scheme in the embodiment of the present invention.
Fig. 3 is a schematic diagram of a visualized main shift implemented by a 3.0 deep application stage scheme in the embodiment of the present invention.
Fig. 4 is a schematic diagram of a "4.0 safety protection lifting phase" scheme in the embodiment of the present invention.
FIG. 5 is a schematic diagram of the main independent functions of the scheme "5.0 capacity expansion application stage" for realizing #1 and #2 in the embodiment of the present invention.
Detailed Description
The technical scheme of the invention is specifically explained below with reference to the accompanying drawings.
The invention provides a practical method for monitoring a distribution substation based on a distribution network system, wherein at a distribution substation end, a single main transformer is additionally provided with a triangular coil PT with an opening on a bus to obtain zero sequence voltage, the numerical value of 10V is 3U0 to trigger an over-limit action remote signaling signal condition, the over-limit action remote signaling signal is linked with an analog switch, when the over-limit action remote signaling signal appears, the analog switch keeps sending an upper opening separating gate remote signaling signal, and the principle of studying and judging a bullet window by combining the distribution network system is combined, and the ground loss monitoring is realized by setting a distribution network system database; and at the master station end, a distribution network system database is improved, and the display and remote control on the distribution network system are realized by acquiring the position signals and the oil temperature data of the main transformer tap on site.
Installing an optical transmitter and receiver to a county dispatching station in a distribution substation, installing independent optical communication equipment in the county dispatching station, uploading data to a local dispatching station, installing deployment network security access area access in the local dispatching station, and transmitting the data to a distribution network system server for processing.
The county-level-adjustment uploading data to the local tone is achieved through DTU equipment and the electric power special VPN network segment channel of an operator.
And the county tone sends data to the local tone, and the wired transmission of the data is realized through the built wired architecture network from the county tone to the local tone.
Four remote information collected by a plurality of main transformers is gathered to a DTU through a network cable led out by a concentrator and processed together, and data is uploaded by utilizing a special VPN network segment channel of electric power of an operator.
The following is a specific implementation of the present invention.
The invention relates to a practical monitoring method for a distribution substation based on a distribution network system, which can be implemented by 5 staged schemes: the final scheme is that a distribution substation end is transformed, a single main transformer is additionally provided with a triangular coil PT (zero sequence voltage) with an opening on a bus, the upper-sending out-of-limit action remote signaling signal condition is triggered by a numerical value of 3U0 with 10V, the out-of-limit signal is linked with an analog switch, and the analog switch keeps sending the opening remote signaling signal when the out-of-limit signal appears. Finally, combining the principle of studying and judging the popup window of the distribution network system, and performing specific setting on a database of the distribution network system to realize the land loss monitoring; improving a database at a master station end, reforming equipment at a field end, acquiring position signals of a main transformer tap and oil temperature data, and realizing display and remote control on a distribution network system; installing an optical transmitter and receiver to a county dispatching station in a distribution substation, installing independent optical communication equipment in the county dispatching station, sending the optical communication equipment to a local dispatching station through a special channel, installing deployment network security access area access in the local dispatching station, and transmitting the optical communication equipment to a distribution network system server for processing.
1. The "1.0 radio access phase" scheme (as shown in fig. 1):
two problems are solved:
(1) the problem of signal access of a distribution substation;
(2) the ground loss monitoring function is achieved, and monitoring is achieved.
The method comprises the following steps: the method comprises the steps of utilizing a power special VPN network segment of an operator to send to a distribution network automation (DMS) system, triggering an upper limit-exceeding action remote signaling signal condition by using a triangular coil PT (zero sequence voltage) with an opening on a bus and taking a value of 3U0 as 10V, and linking an limit-exceeding signal with an analog switch, wherein the analog switch keeps an upper brake-separating remote signaling signal when the limit-exceeding signal appears. Finally, combining the principle of studying and judging the popup window of the distribution network system, carrying out specific setting on a database of the distribution network system to realize the lost-place monitoring.
2. The "2.0 wired access phase" scheme (as shown in fig. 2):
the problems are solved: the defect of unstable signals of a wireless access scheme of a power distribution transformer is overcome.
The method comprises the following steps: and (4) building a wired access network, and improving the wired access network into a wired access scheme. Specifically, a wired architecture network from county to local is designed and implemented, specific functional application in a system database is considered, hardware networking is increased step by step from a station end to the local, and finally wired signal transmission of a power distribution transformer is achieved through debugging.
3. The "3.0 deep application stage" protocol (as shown in figure 3):
the problems are solved: the power distribution transformation and regulation voltage is not timely, and manual field regulation is needed.
The method comprises the following steps: and improving the database at the master station end, reforming the equipment at the field end, collecting the position signal of the tap joint of the main transformer and realizing remote control. And a dispatcher use scheme is formulated on the basis of the remote control function of the distribution network system, and the test is realized.
4. 4.0 safety protection lifting phase scheme (as shown in figure 4)
The problems are solved: the defects that the safety protection capability of the power distribution transformer substation is weak, and the new requirement for accessing the secondary safety protection information in Fujian is not met are overcome, and the requirement that the power distribution transformer substation network is cut off and stopped.
The method comprises the following steps: the special wired safety access area for the distribution network is built at the local dispatching end, the county dispatching of the production and distribution power transformer is realized, the independent special wired channel is redeployed at the county dispatching end, the access grid structure is combed, the information access safety protection level is improved, and finally the provincial dispatching requirement is met.
5. The "5.0 Capacity application phase" scheme (shown in FIG. 5):
the problems are solved: the load of the original Pucheng 35kV Queen transformer power supply range is increased rapidly, a No. 2 main transformer is added, and the power supply capacity is improved.
The method comprises the following steps: and leading out the four-remote information acquired by the #2 main transformer through a concentrator, collecting the four-remote information into the original DTU for processing, and sending the four-remote information by adopting the original line channel. The main difficulty is that the database of the main station needs to be specifically set, and one DTU controls two main transformers, so that the two main transformers and the circuit switches thereof have independent and completely consistent functions.
The distribution network system-based distribution transformation 5 staged production schemes are suitable for most power grid companies based on self construction conditions, and each power grid company can be popularized as required to realize the key functions of a main network system for monitoring a conventional transformer substation.
The final scheme realizes the remote control gear shifting function of the power distribution transformer, realizes reliable and flexible voltage regulation by scheduling, greatly improves the level of management application of the power distribution transformer, meets the requirement of safety protection of the power distribution transformer for transmitting data to a management control I area, and realizes the basic requirement of energy Internet. The whole set of scheme is divided into five stages, is suitable for the application of distribution transformer substations in different stages, fully exerts the effect of the distribution transformer substation, and has the value of popularization and application.
The concrete benefits are as follows:
1. realize flexible and rapid voltage regulation
Before the on-load voltage regulation function of the main transformer is not realized, the main transformer gear shifting needs to be dispatched to order power supply station personnel to go to the site for manual operation, and after the remote gear shifting is realized, a controller can flexibly adjust gears in real time according to on-site voltage data.
2. Reduce the time consumption of operation and the labor cost
The distribution becomes the place far away, and personnel need arrive the field operation, and a series of flows of main change gear shifting get off, and is consuming time long to increase the work load of scheduling specialty and power supply station personnel, it is difficult when running into bad weather, and possess the distant place and transfer the shelves after, the regulation and control person adjusts the gear according to the voltage data at scene, and the field personnel need not arrive at the scene, and consuming time can almost be ignored, and the human cost of saving is huge.
3. Improving customer satisfaction of electricity consumption
Before the main transformer on-load voltage regulation function is not realized, the voltage fluctuation regulation consumes long time, the influence on customers with high power quality requirements is obvious, and the power quality cannot be improved for a long time, so that complaints are easily caused.
4. Reducing the influence of weather on voltage quality
If the small hydropower stations are in areas with abundant resources, the voltage level is easily influenced by the water and electricity internet surfing and fluctuates frequently, and the flexible and convenient voltage regulation mode is favorable for improving the electric energy internet surfing capability and the economic benefit.
5. Increase electricity sales and economic benefits
The scheme realizes stable and reliable electric energy supply, can directly reduce load loss caused by unstable voltage and directly increases economic benefit.
6. Reduce line loss, save energy and create efficiency
The popularization of the power distribution transformer substation is realized, the power supply radius is shortened, and the 10kV line loss is greatly reduced under the conditions of voltage increase and resistance reduction according to a formula. The low-voltage line loss rate of the transformer area is reduced, the voltage line at the head end of the line is improved under the condition that the line resistance is unchanged and the line transmission power is unchanged, the line voltage is improved, the transmission current is reduced, and the purposes of loss reduction and energy saving can be finally achieved.
7. Improve the safety protection performance of the power grid information data
Since 2019, the requirement of the state network company on information safety protection is improved to a quite high degree, the safety of the power distribution transformer is always lack of a reliable protection scheme, and the information communication safety protection performance of the power distribution transformer is greatly improved by the scheme.
This solution has been put into operation by the Pucheng test until now. Through preliminary measurement and calculation, only the adjustment of Pucheng county can create about 112 ten thousand yuan of economic value in one year.
The economic value is as follows:
when the comparison distribution substation can not be normally put into operation, 10kV power conversion is carried out, and when the electricity is sold in the radiation range of two power distributions within about 140 ten thousand kilowatts each month, the comparison is carried out through the normal use of the distribution substation, and the 35kV power supply line loss can be reduced by about 5 ten thousand yuan each month.
Line loss savings throughout the year can create profit a 1: 12 months =60 ten thousand yuan
When the remote control gear shifting function is not realized, the voltage instability of a transformer substation occurs, the voltage of electric equipment in a factory is unstable, the shutdown and production halt are caused, the electricity sales are reduced, and the synchronization is compared with that in 2017. The electricity sale in the radiation range of two power distribution chemical substations is reduced by about 20 ten thousand degrees every month, and the local electricity purchase price and the electricity sale price difference are calculated.
The profit of selling electricity can be created all the year around A2: 20 ten thousand 0.2 yuan 12 months =48 ten thousand
When the remote control gear shifting function is not realized, the voltage instability of a transformer substation occurs, the voltage of electric equipment in a factory is unstable, and the field adjustment of power supply station personnel is needed. Statistics is carried out on the running condition of the mobile terminal for many months in 2018. On average 4 per month occurred per station, with an average treatment duration of 5 hours. The distance between the two power distribution substations in Pucheng is 20 kilometers from the power supply station, and the power distribution substations are provided with mountain roads.
The oil cost of 2 vehicles, 6 people and one vehicle is 300 for emergency disposal, each person normally pays 200 yuan per day, and the total cost is required
The manpower profit can be saved all the year around A3: (300 × 4 × 2+ 200 × 6 persons) × 12 months =4.32 ten thousand yuan
Therefore, in view of the above, the scheme will create economic benefits of about A:
a = a1+ a2+ A3=60 ten thousand +48 ten thousand +4.32 ten thousand =112.32 ten thousand
And the line loss, the load loss and the labor cost are only considered, when the distribution transformer substation cannot be normally applied, the economic loss caused to users is larger, about 800 ten thousand yuan is consumed for constructing a 35kV conventional transformer substation containing 2 main transformer capacities (6.3M + 10M), only 400-500 ten thousand yuan is needed for constructing a distribution transformer substation with the same capacity scale, and the investment cost is only half of the cost.
The above are preferred embodiments of the present invention, and all changes made according to the technical scheme of the present invention that produce functional effects do not exceed the scope of the technical scheme of the present invention belong to the protection scope of the present invention.

Claims (5)

1. A practical method for monitoring a distribution substation based on a distribution network system is characterized in that at a distribution substation end, a single main transformer is additionally provided with a triangular coil PT with an opening on a bus to obtain zero sequence voltage, the numerical value of 10V is 3U0 to trigger an over-limit action remote signaling signal condition, the over-limit action remote signaling signal is linked with an analog switch, when the over-limit action remote signaling signal appears, the analog switch keeps sending an upper opening separating gate remote signaling signal, and the principle of studying and judging a bullet window of the distribution network system is combined, and the ground loss monitoring is realized by setting a distribution network system database; and at the master station end, a distribution network system database is improved, and the display and remote control on the distribution network system are realized by acquiring the position signals and the oil temperature data of the main transformer tap on site.
2. The practical distribution substation monitoring method based on the distribution network system, according to claim 1, is characterized in that an optical transceiver is installed in the distribution substation to a county level, an independent optical communication device is installed in the county level, data is uploaded to a local level, the local level is installed in a deployment network security access area, and the data is transmitted to a distribution network system server for processing.
3. The practical distribution substation monitoring method based on the distribution network system as claimed in claim 2, wherein the county-level dispatch data upload to the local dispatch is realized by using a dedicated power VPN (virtual private network) network segment channel of an operator through a DTU (data transfer unit) device.
4. The practical distribution substation monitoring method based on the distribution network system, as recited in claim 2, is characterized in that the county call sends data to the local call via the built wired architecture network from the county call to the local call to realize wired transmission of the data.
5. The practical distribution substation monitoring method based on the distribution network system as claimed in claim 1, wherein the four remote information collected by multiple main transformers is collected into a DTU through a network cable led out from a concentrator and processed together, and the data is uploaded by using a VPN network segment channel dedicated to electric power of an operator.
CN202010583692.2A 2020-06-24 2020-06-24 Distribution substation monitoring practical method based on distribution network system Pending CN111786459A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010583692.2A CN111786459A (en) 2020-06-24 2020-06-24 Distribution substation monitoring practical method based on distribution network system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010583692.2A CN111786459A (en) 2020-06-24 2020-06-24 Distribution substation monitoring practical method based on distribution network system

Publications (1)

Publication Number Publication Date
CN111786459A true CN111786459A (en) 2020-10-16

Family

ID=72757632

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010583692.2A Pending CN111786459A (en) 2020-06-24 2020-06-24 Distribution substation monitoring practical method based on distribution network system

Country Status (1)

Country Link
CN (1) CN111786459A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201893540U (en) * 2010-11-26 2011-07-06 南宁华供电力科技有限公司 Intelligent radio network dispatching digital-type boundary controller complete equipment
CN104201775A (en) * 2014-08-19 2014-12-10 江苏省电力设计院 Distribution automation system configuration method based on city and county level integration
CN104242454A (en) * 2014-09-24 2014-12-24 刘瑞 Power monitoring system of rail transit power supply system
CN105510731A (en) * 2015-11-26 2016-04-20 国网辽宁省电力有限公司大连供电公司 Parallel resonance detection alarming method and system for medium-voltage side power grid of power transformer
CN106787172A (en) * 2016-11-29 2017-05-31 国电南瑞科技股份有限公司 A kind of distribution power automation terminal various dimensions state integrated monitoring
CN110071579A (en) * 2019-06-05 2019-07-30 国网北京市电力公司 Power grid power supply based on ubiquitous electric power Internet of Things ensures and intelligent managing and control system
CN111146755A (en) * 2019-12-31 2020-05-12 石家庄高景软件科技有限公司 Feeder terminal and line protection device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201893540U (en) * 2010-11-26 2011-07-06 南宁华供电力科技有限公司 Intelligent radio network dispatching digital-type boundary controller complete equipment
CN104201775A (en) * 2014-08-19 2014-12-10 江苏省电力设计院 Distribution automation system configuration method based on city and county level integration
CN104242454A (en) * 2014-09-24 2014-12-24 刘瑞 Power monitoring system of rail transit power supply system
CN105510731A (en) * 2015-11-26 2016-04-20 国网辽宁省电力有限公司大连供电公司 Parallel resonance detection alarming method and system for medium-voltage side power grid of power transformer
CN106787172A (en) * 2016-11-29 2017-05-31 国电南瑞科技股份有限公司 A kind of distribution power automation terminal various dimensions state integrated monitoring
CN110071579A (en) * 2019-06-05 2019-07-30 国网北京市电力公司 Power grid power supply based on ubiquitous electric power Internet of Things ensures and intelligent managing and control system
CN111146755A (en) * 2019-12-31 2020-05-12 石家庄高景软件科技有限公司 Feeder terminal and line protection device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
冷森林,石维: "压电陶瓷工艺原理及器件应用研究", vol. 1, 30 September 2019, 北京工业大学出版社, pages: 237 - 239 *

Similar Documents

Publication Publication Date Title
CN102571514B (en) Intelligent power consumption cell system
CN201331560Y (en) Distributing transformer monitoring device
CN107038530A (en) A kind of power distribution network overall planning method and system
CN103577892A (en) Progressive intelligent power distribution system scheduling method
WO2011063593A2 (en) Multi-network integration smart power grid system
CN109697912B (en) Power distribution network operation and maintenance training system
CN109713793A (en) A kind of substation station power supply presence assessment system and method
CN108173267B (en) Offshore wind power plant and island microgrid combined monitoring system
CN212012259U (en) Low-voltage distribution network state monitoring system with intelligent distribution transformer terminal
CN109494877A (en) Marine wind electric field integrated monitoring method, apparatus, computer equipment and medium
CN102638096A (en) Wireless monitoring system based on General Packet Radio Service (GPRS) for distributing transformer
CN204497849U (en) A kind ofly take into account measure and control device that is centralized, formula feeder automation on the spot
CN109389521A (en) A kind of distribution network automated intelligent management system
CN104638680A (en) Control system for wind power and thermal power combined power generation
CN114139742A (en) Power distribution network management and control system and management and control method
CN206211518U (en) A kind of photovoltaic case becomes uses comprehensive monitoring protection system
CN111786459A (en) Distribution substation monitoring practical method based on distribution network system
CN204258280U (en) Boundary switch controller
CN106372764A (en) 10kV distribution network and 10kV distribution network coordination configuration method
CN104348131A (en) 35kV power failure recovery system and method based on smart power distribution network
CN202150738U (en) Remote monitoring system for reactive power compensator
CN108303956B (en) Automatic on-duty centralized monitoring system for power grid dispatching
CN202455164U (en) Small hydropower voltage regulating and monitoring system based on general packet radio service (GPRS) + short distance wireless communication
Yang et al. Research on Application of Distribution Automation Terminal Equipment Based on Smart Grid in Power Distribution Automation
CN211827429U (en) Outdoor overhead prepayment equipment

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination