CN112421624A - Theoretical line loss evaluation system of high-voltage power grid - Google Patents
Theoretical line loss evaluation system of high-voltage power grid Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit 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
- H02J13/00001—Circuit 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]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit 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
- H02J13/00002—Circuit 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit 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
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit 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
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00034—Systems 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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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
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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
- Y04S10/40—Display of information, e.g. of data or controls
Abstract
The invention discloses a theoretical line loss evaluation system of a high-voltage power grid, which comprises a terminal information collector, a terminal data memory, a reference value memory, a central computer and a real-time data display large screen, wherein the terminal information collector is arranged on each substation statistical device and each terminal electricity consumption unit statistical device, the terminal data memory is connected with each terminal information collector and stores real-time data, the reference value memory is connected with each power plant generator set statistical device, the reference value memory collects real-time generated energy and stores data in the terminal data memory before the current day, the central computer is connected with the terminal data memory and the reference value memory and compares, analyzes and calculates to obtain line loss data, and the real-time data display large screen is connected with the central computer and displays the comparison, analysis and calculation results in real time. The invention relates to the technical field of high-voltage power grid theoretical line loss evaluation systems, in particular to a high-voltage power grid theoretical line loss evaluation system.
Description
Technical Field
The invention relates to the technical field of high-voltage power grid theoretical line loss evaluation systems, in particular to a high-voltage power grid theoretical line loss evaluation system.
Background
The power grid refers to a whole formed by a substation with various voltages and a power transmission and distribution line in a power system, is called as a power grid and comprises three units of power transformation, power transmission and power distribution; the task of the power grid is to deliver and distribute electrical energy, changing the voltage; line loss is the energy loss resulting from the transmission of electrical energy through a transmission line.
High-voltage transmission is a mode of transmitting the voltage output by a generator after boosting the voltage by a transformer for a power plant; the reason for transmitting power in this way is that in the case of power transmitted simultaneously, the higher the voltage, the smaller the current, so that high-voltage transmission can reduce the current during power transmission, thereby reducing the heat loss due to the current and reducing the material cost for long-distance transmission.
Electric energy generated from a power station is generally transmitted to each power utilization place through a power transmission line, and different high voltages are adopted according to the distance of the transmitted electric energy; according to the electric power condition of China, 220 kV voltage is adopted for power transmission when the power transmission distance is 200-300 kilometers; 110 kilovolts is adopted when the distance is about 100 kilometers; 35 kilovolts or 66 kilovolts is adopted for about 50 kilometers; 10 kilovolts and 12 kilovolts are used at 15-20 kilometers, and 6300 volts is used in some cases.
Because the power loss on the transmission line is in direct proportion to the square of the current, a large-scale power transformer is required to be used for increasing the voltage to reduce the current during long-distance transmission, so that the heating of the conducting wire is reduced, and the loss of electric energy on the transmission line can be effectively reduced; the electric power generated by the power plant is constant and depends on the generating capacity of the generating set, according to the constant power effect of the generator, if the voltage U in the transmission line is increased, the current I in the transmission line is necessarily reduced, and the power Q lost by the transmission line is equal to I2Rt must be reduced accordingly, if the current in the line is reduced to 1/2, the power lost in the line is reduced to far loss (1/2)21/4, increasing the voltage is effective in reducing power loss in the line, and high or ultra-high voltage is required for long distance power transmission in terms of both reducing power loss on the transmission line and saving materials used in the transmission line.
However, the transmission voltage cannot be increased blindly, because the higher the transmission voltage is, the stricter the requirements of the construction of the transmission overhead line on various materials are, and the higher the cost of the line is; therefore, the power transmission line can reduce power loss and save construction investment from specific practical conditions.
The method has the advantages that a complete monitoring system is also established while a data collecting system for operation and maintenance of the high-voltage transmission equipment is perfected, manual inspection cannot be carried out in an all-around and long-time mode, so that equipment monitoring is more important, an effective monitoring means is provided for operation and maintenance of the high-voltage transmission equipment, and accordingly data acquisition capacity is improved, and timely fault removal is promoted; the theoretical line loss calculation needs a great deal of time and labor, the production unit collects power grid operation data of typical months or days, the basic unit reports equipment parameters to a line loss management department, and finally a conscientious engineer checks, arranges and calculates the data, so that the power grid loss of the power transmission network can be quickly and effectively evaluated.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides a high-voltage power grid theoretical line loss evaluation system, which is used for establishing a power grid module diagram, feeding back data of a transformer substation and a power utilization terminal in real time by utilizing the prior network technology, and displaying the power grid theoretical line loss data and an abnormal high-voltage power transmission circuit in real time by assisting with data of the past day and the month.
The technical scheme adopted by the invention is as follows: the invention relates to a theoretical line loss evaluation system of a high-voltage power grid, which comprises a terminal information collector, a terminal data memory, a reference value memory, a central computer and a real-time data display large screen, wherein the terminal information collector is arranged on each substation statistical device and each terminal electricity consumption unit statistical device, data can be transmitted by using a 5G network or a wired network, the terminal data memory is connected with each terminal information collector and stores real-time data to provide a data basis for calculating real-time line loss and reflecting line abnormity, the reference value memory is connected with a generating set statistical device, the reference value memory collects real-time generated energy and stores data in the terminal data memory before the day, the central computer is connected with the terminal data memory and the reference value memory and compares, analyzes and calculates to obtain line loss data, the real-time data display large screen is connected with the central computer and displays the comparison analysis calculation result in real time.
Furthermore, the acquisition time of the terminal information acquisition unit is once every 30 minutes, the data of the electric equipment, the data of the transformer substation and the data of the power plant in the whole area are a huge network data system, and certain time is required for acquisition and calculation, so that the data cannot be updated immediately after being changed.
Further, be equipped with abnormal data analysis module in the central computer, not only analysis real-time line loss data still with line loss data contrast before this at this moment, if have with the great condition of line loss data difference in the past, then can be recorded and send data to real-time data display large-size screen.
Furthermore, a power grid model map is arranged on the real-time data display large screen, a plurality of groups of power transmission circuit lines are arranged on the power grid model map, a use state column, a real-time data column and a comparison result column are arranged on the power transmission circuit lines, the use state column displays the use states of the power transmission circuit lines and the transformer substations and terminal power consumption units arranged on the power transmission circuit lines, the real-time data column displays real-time line loss data on the power transmission circuit lines, and the comparison result column displays data difference between the power transmission circuit lines and the past data.
The invention with the structure has the following beneficial effects: real-time data of each transformer substation and each terminal electricity consumption unit are fed back by a terminal information collector through the existing network technology to provide accurate basic data for calculating theoretical line loss and network loss of a high-voltage power grid, a power plant, the transformer substations and the terminal electricity consumption units are modularized, a power grid model map is established, each power transmission circuit line can be clearly independent, data analysis and line loss calculation are facilitated, position reference is also provided for abnormal condition maintenance, a reference value storage can be used for storing real-time data generated by the power plant and past data in the terminal information collector, differential analysis of specific output electric quantity and used electric quantity can be achieved, the line loss data and the use condition of the power transmission circuit line at the moment can be more comprehensively reflected by comparing the past line loss data, a large screen is displayed by using the real-time data, and a man-machine interface can conveniently and clearly display the data calculated by a central computer, the scheduling personnel can find and solve the problems in time; the various components and modules cooperate to complete the present evaluation system.
Drawings
Fig. 1 is a schematic diagram of a theoretical line loss evaluation system of a high-voltage power grid according to the present invention.
The system comprises a terminal information acquisition device 1, a terminal data storage device 2, a reference value storage device 3, a central computer 4, a real-time data display large screen 6, an abnormal data analysis module 7, a power grid model map 8, a power transmission circuit line 9, a use state column 10, a real-time data column 11 and a comparison result column.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in figure 1, the invention relates to a theoretical line loss evaluation system of a high-voltage power grid, which comprises a terminal information collector 1, a terminal data memory 2, a reference value memory 3, a central computer 4 and a real-time data display large screen 5, the terminal information collector 1 is arranged on each substation statistical device and each terminal electricity consumption unit statistical device, the terminal data memory 2 is connected with each terminal information collector 1 and stores real-time data, the reference value memory 3 is connected with the generating set statistical equipment of the power plant, the reference value memory 3 collects the real-time power generation amount and stores data in the terminal data memory 2 before the day, the central computer 4 is connected with the terminal data memory 2 and the reference value memory 3 and compares, analyzes and calculates line loss data, the real-time data display large screen 5 is connected with the central computer 4 and displays the comparison, analysis and calculation results in real time.
The terminal information collector 1 is used for collecting data once in 30 minutes, an abnormal data analysis module 6 is arranged in the central computer 4, a power grid model map 7 is arranged on the real-time data display large screen 5, a plurality of groups of power transmission circuit lines 8 are arranged on the power grid model map 7, and a use state column 9, a real-time data column 10 and a comparison result column 11 are arranged on the power transmission circuit lines 8.
When the system is used specifically, a power plant, a transformer substation and a terminal electricity consumption unit are modularized to form a power grid model map 7, each power transmission circuit line 8 is clearly independent of a load arranged on the power grid model map, data of each transformer substation and the terminal electricity consumption unit are fed back to a terminal data storage 2 at regular time by a terminal information collector 1 through the existing network technology, real-time data generated by the power plant and past data in the terminal data storage 2 are collected by a reference value storage 3, the data of the terminal information collector 1 and the reference value storage 3 are collected and analyzed and calculated by a central computer 4 to obtain real-time data of each power transmission circuit line 8, the data are displayed in a use state column 9, a real-time data column 10 and a comparison result column 11 of each power transmission circuit line 8 by taking 30 minutes as a period, and the data are provided for a dispatcher to refer.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
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 (4)
1. The utility model provides a theoretical line loss evaluation system of high voltage electric network which characterized in that: the power station generator set statistical equipment comprises terminal information collectors, terminal data storages, reference value storages, a central computer and a real-time data display large screen, wherein the terminal information collectors are arranged on the statistical equipment of transformer substations and the statistical equipment of terminal power consumption units, the terminal data storages are connected with the terminal information collectors and store real-time data, the reference value storages are connected with the statistical equipment of power station generator sets, the reference value storages collect real-time generated energy and store data in the terminal data storages before the day, the central computer is connected with the terminal data storages and the reference value storages and calculates line loss data through contrastive analysis, and the real-time data display large screen is connected with the central computer and displays contrastive analysis calculation results in real time.
2. The theoretical line loss evaluation system of the high-voltage power grid according to claim 1, wherein: the acquisition time of the terminal information acquisition device is 30 minutes.
3. The theoretical line loss evaluation system of the high-voltage power grid according to claim 1, wherein: and an abnormal data analysis module is arranged in the central computer.
4. The theoretical line loss evaluation system of the high-voltage power grid according to claim 1, wherein: the real-time data display screen is provided with a power grid model map, the power grid model map is provided with a plurality of groups of power transmission circuit lines, and the power transmission circuit lines are provided with a use state column, a real-time data column and a comparison result column.
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| CN202011262102.2A CN112421624A (en) | 2020-11-12 | 2020-11-12 | Theoretical line loss evaluation system of high-voltage power grid |
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| CN202011262102.2A CN112421624A (en) | 2020-11-12 | 2020-11-12 | Theoretical line loss evaluation system of high-voltage power grid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117761468A (en) * | 2024-02-22 | 2024-03-26 | 国网甘肃省电力公司张掖供电公司 | multi-parameter operation state monitoring method and system for new energy power station |
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Application publication date: 20210226 |