CN109149569B - Voltage and current analysis processing system based on power grid system - Google Patents
Voltage and current analysis processing system based on power grid system 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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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Abstract
The invention discloses a voltage and current analysis processing system based on a power grid system, which comprises a current acquisition module, a voltage acquisition module, a signal processing module, a power grid database, a current regulation module, a voltage compensation module and a display terminal, wherein the current acquisition module is connected with the voltage compensation module; the signal processing module is respectively connected with the current acquisition module, the voltage acquisition module, the power grid database, the current regulation module, the voltage compensation module and the display terminal. The current acquisition module and the voltage acquisition module are used for detecting the current and the voltage on each sub-line to be detected on the power grid in real time, the signal processing module is used for compensating the current or the voltage of the line with insufficient current and voltage on the line by combining the current regulation module and the voltage compensation module, the voltage on the line is ensured to meet the requirement of the power grid in terms of current, the stability and the safety of the power grid are improved, the effective analysis capability of a power grid system is realized, and the characteristics of convenience in operation, strong practicability and high safety are achieved.
Description
Technical Field
The invention belongs to the technical field of power grids, and relates to a voltage and current analysis and processing system based on a power grid system.
Background
With the increasing attention of users to power supply reliability and power quality and the massive utilization of renewable energy sources in various forms such as solar energy, wind energy and the like, the power grid generally refers to a small power grid form in which various distributed power sources, energy storage devices and loads are connected through power electronic devices, and the power grid can be operated in a grid-connected mode, can exchange energy with a traditional large power grid, can be operated independently, and becomes an isolated system capable of operating stably.
With the massive access of distributed power generation units, the problem of electric energy quality becomes more and more severe. The improvement of the power quality is generally achieved by using passive filters or active filters. The passive filter is a filter formed by appropriately combining a power capacitor, a reactor, and a resistor. The method can inhibit harmonic waves and compensate reactive power, has a simple structure, and is widely used all the time. However, real-time voltage and current compensation cannot be performed on each line in the power grid, so that the safety and stability of each line in the power grid system are poor.
Disclosure of Invention
The invention aims to provide a voltage and current analysis and processing system based on a power grid system, which solves the problems of poor stability and poor safety in the conventional power grid.
The purpose of the invention can be realized by the following technical scheme:
a voltage and current analysis processing system based on a power grid system comprises a current acquisition module, a voltage acquisition module, a signal processing module, a power grid database, a current regulation module, a voltage compensation module and a display terminal, wherein the signal processing module is respectively connected with the current acquisition module, the voltage acquisition module, the power grid database, the current regulation module, the voltage compensation module and the display terminal;
the power grid system comprises a plurality of lines which do not cross each other, each line is numbered, and the number of each line is 1,2, the.
The current acquisition module comprises a plurality of current acquisition units, each current acquisition unit is respectively installed on each sub-line to be detected, each current acquisition unit is a current sensor and is used for detecting the current in the sub-line to be detected in real time and sending the detected current information to the signal processing module; the number corresponding to the current acquisition unit arranged on each sub-line to be detected is the same as the number corresponding to the sub-line to be detected;
the voltage acquisition module comprises a plurality of voltage acquisition units, each voltage acquisition unit is respectively installed on each sub-line to be detected, each voltage acquisition unit is a voltage sensor and is used for detecting the voltage on the sub-line to be detected in real time and sending the detected voltage to the signal processing module; the number corresponding to the voltage acquisition unit arranged on each sub-line to be detected is the same as the number corresponding to the sub-line to be detected;
the power grid database is used for storing current and voltage values set on each sub-line to be detected in different lines and storing comparison proportion ranges between allowable detection voltages and specified voltages on each sub-line to be detected;
the signal processing module receives current information sent by each current acquisition unit in the current acquisition module and voltage information sent by each voltage acquisition unit in the voltage acquisition module, compares the received current information on each sub-line to be detected with the current on the sub-line to be detected stored in the power grid database, and sends a current regulation and control instruction to the current regulation module if the current information is smaller than or larger than the current magnitude stored in the power grid database;
meanwhile, the received voltage information of each sub-line to be detected is subtracted from the voltage of the sub-line to be detected stored in the power grid database, an absolute value is obtained, the voltage difference of the absolute value is compared with the voltage stored in the power grid database, a compared proportional value is obtained, if the compared proportional value between the detected voltage and the voltage stored in the power grid database is within a set standard proportional range, the signal processing module does not send a control command to the voltage compensation module, and if the compared proportional value between the detected voltage and the voltage stored in the power grid database is not within the set standard proportional range, the signal processing module sends a voltage control command to the voltage compensation module;
the signal processing module statistically analyzes the stability evaluation coefficient Q of the line according to the received current and voltage of each sub-line to be detected ij According to the stability evaluation coefficient on each sub-line to be detected, the integral stability evaluation coefficient corresponding to the power grid is counted
The signal processing module sends the received current and voltage information on each sub-line to be detected to a display terminal, and sends the counted stability evaluation coefficient on each sub-line to be detected and the overall stability evaluation coefficient corresponding to the whole power grid system to the display terminal;
the current adjusting module comprises a plurality of current adjusting units, each current adjusting unit is respectively installed on each sub-line to be detected and is used for receiving a current adjusting and controlling instruction sent by the signal processing module to adjust the current on the sub-line to be detected and sending the adjusted current to the signal processing module until the adjusted current meets the current magnitude stored in the power grid database;
the voltage compensation module comprises a plurality of voltage compensation units, each voltage compensation unit is respectively installed on each sub-line to be detected, and the voltage compensation units are used for receiving voltage control instructions sent by the signal processing module in real time to adjust the voltage on the sub-line to be detected and sending the adjusted voltage to the signal processing module until the comparison proportion value between the voltage in the sub-line to be detected and the voltage stored in the power grid database is within a set standard proportion range;
the display terminal is used for receiving the current and voltage information and the stability evaluation coefficient on each sub-line to be detected sent by the signal processing module and the overall stability evaluation coefficient corresponding to the whole power grid system, and displaying the received current and voltage information and stability evaluation coefficient on each sub-line to be detected and the overall stability evaluation coefficient corresponding to the whole power grid system.
As a preferred technical scheme of the invention, the stability evaluation coefficient Q on each sub-line to be detected ij Is calculated by the formula
Beta is expressed as an influence coefficient, and 0.825 ij Expressed as the current magnitude on the jth to-be-detected sub-line on the ith line, I Index ij Expressed as the standard current, U, on the jth line to be detected ij Expressed as the voltage magnitude, U, on the jth line to be detected Notation ij And the standard voltage of the jth sub-line to be detected on the ith line is expressed.
Compared with the prior art, the invention has the beneficial effects that:
according to the voltage and current analysis processing system based on the power grid system, the current and voltage on each sub-line to be detected on the power grid are detected in real time through the current acquisition module and the voltage acquisition module, current or voltage compensation is performed on the line with insufficient current and voltage on the line through the signal processing module and the current regulation module and the voltage compensation module, the voltage on the line is ensured to meet the requirement of the power grid when the current is higher than the current, the stability and the safety of the power grid are improved, the effective analysis capability of the power grid system is realized, visual power grid data can be conveniently provided for managers, and the voltage and current analysis processing system based on the power grid system has the characteristics of convenience in operation, strong practicability and high safety.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used for describing the embodiments will be briefly introduced below.
Fig. 1 is a schematic diagram of a voltage and current analysis and processing system based on a power grid system according to the present invention.
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.
Referring to fig. 1, a voltage and current analysis processing system based on a power grid system includes a current collection module, a voltage collection module, a signal processing module, a power grid database, a current regulation module, a voltage compensation module, and a display terminal, where the signal processing module is respectively connected to the current collection module, the voltage collection module, the power grid database, the current regulation module, the voltage compensation module, and the display terminal.
The power grid system comprises a plurality of lines which do not cross each other, each line is numbered, and the number of each line is 1,2, a.
The current acquisition module comprises a plurality of current acquisition units, each current acquisition unit is respectively installed on each sub-line to be detected, each current acquisition unit is a current sensor and is used for detecting the current in the sub-line to be detected in real time and sending the detected current information to the signal processing module. And the number corresponding to the current acquisition unit arranged on each sub-line to be detected is the same as the number corresponding to the sub-line to be detected.
The voltage acquisition module comprises a plurality of voltage acquisition units, each voltage acquisition unit is respectively installed on each sub-line to be detected, each voltage acquisition unit is a voltage sensor and is used for detecting the voltage on the sub-line to be detected in real time and sending the detected voltage to the signal processing module. And the number corresponding to the voltage acquisition unit arranged on each sub-line to be detected is the same as the number corresponding to the sub-line to be detected.
The power grid database is used for storing current and voltage values set on each sub-line to be detected in different lines and storing comparison proportion ranges between allowable detection voltages and specified voltages on the sub-lines to be detected.
The signal processing module receives current information sent by each current acquisition unit in the current acquisition module and voltage information sent by each voltage acquisition unit in the voltage acquisition module, compares the received current information on each sub-line to be detected with the current on the sub-line to be detected stored in the power grid database, and sends a current regulation and control instruction to the current regulation module if the current information is smaller than or larger than the current magnitude stored in the power grid database.
Meanwhile, the received voltage information of each sub-line to be detected is subtracted from the voltage of the sub-line to be detected stored in the power grid database, an absolute value is obtained, the voltage difference of the absolute value is compared with the voltage stored in the power grid database, a compared proportional value is obtained, if the compared proportional value between the detected voltage and the voltage stored in the power grid database is within a set standard proportional range, the signal processing module does not send a control command to the voltage compensation module, and if the compared proportional value between the detected voltage and the voltage stored in the power grid database is not within the set standard proportional range, the signal processing module sends a voltage control command to the voltage compensation module.
The signal processing module statistically analyzes the stability evaluation coefficient Q of the line according to the received current and voltage of each sub-line to be detected ij ，Q ij Is calculated by the formula
Beta is expressed as an influence coefficient, and 0.825 ij Expressed as the current magnitude on the jth to-be-detected sub-line on the ith line, I Notation ij Expressed as the standard current, U, on the jth line to be detected ij Expressed as the voltage on the jth sub-line to be detected on the ith line, U Notation ij And the standard voltage of the jth sub-line to be detected on the ith line is expressed.
According to the stability evaluation coefficient on each sub-line to be detected, counting the integral stability evaluation coefficient corresponding to the power grid
And the signal processing module sends the received current and voltage information on each sub-line to be detected to the display terminal, and sends the counted stability evaluation coefficient on each sub-line to be detected and the overall stability evaluation coefficient corresponding to the whole power grid system to the display terminal.
The current adjusting module comprises a plurality of current adjusting units, and each current adjusting unit is respectively installed on each sub-line to be detected and used for receiving a current adjusting and controlling instruction sent by the signal processing module to adjust the current on the sub-line to be detected and sending the adjusted current to the signal processing module until the adjusted current meets the current magnitude stored in the power grid database.
The voltage compensation module comprises a plurality of voltage compensation units, each voltage compensation unit is respectively installed on each sub-line to be detected, and each voltage compensation unit is used for receiving a voltage control command sent by the signal processing module in real time to adjust the voltage on the sub-line to be detected and sending the adjusted voltage to the signal processing module until the proportion value of comparison between the voltage in the sub-line to be detected and the voltage stored in the power grid database is within a set standard proportion range.
The display terminal is used for receiving the current and voltage information and the stability evaluation coefficient on each sub-line to be detected sent by the signal processing module and the overall stability evaluation coefficient corresponding to the whole power grid system, and displaying the received current and voltage information and stability evaluation coefficient on each sub-line to be detected and the overall stability evaluation coefficient corresponding to the whole power grid system.
According to the voltage and current analysis processing system based on the power grid system, the current and voltage on each sub-line to be detected on the power grid are detected in real time through the current acquisition module and the voltage acquisition module, and the current or voltage compensation is performed on the line with insufficient current and voltage on the line through the signal processing module and the combination of the current regulation module and the voltage compensation module, so that the voltage on the line meets the requirement of the power grid on the current, the stability and the safety of the power grid are improved, the effective analysis capability of the power grid system is realized, visual power grid data are conveniently provided for managers, and the voltage and current analysis processing system has the characteristics of convenience in operation, high practicability and high safety.
The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.
Claims (1)
1. A voltage and current analysis processing system based on a power grid system is characterized in that: the intelligent power grid comprises a current acquisition module, a voltage acquisition module, a signal processing module, a power grid database, a current regulation module, a voltage compensation module and a display terminal, wherein the signal processing module is respectively connected with the current acquisition module, the voltage acquisition module, the power grid database, the current regulation module, the voltage compensation module and the display terminal;
the power grid system comprises a plurality of lines which do not cross each other, each line is numbered, and the number of each line is 1,2, the.
The current acquisition module comprises a plurality of current acquisition units, each current acquisition unit is respectively installed on each sub-line to be detected, each current acquisition unit is a current sensor and is used for detecting the current in the sub-line to be detected in real time and sending the detected current information to the signal processing module; the number corresponding to the current acquisition unit arranged on each sub-line to be detected is the same as the number corresponding to the sub-line to be detected;
the voltage acquisition module comprises a plurality of voltage acquisition units, each voltage acquisition unit is respectively installed on each sub-line to be detected, each voltage acquisition unit is a voltage sensor and is used for detecting the voltage on the sub-line to be detected in real time and sending the detected voltage to the signal processing module; the number corresponding to the voltage acquisition unit arranged on each sub-line to be detected is the same as the number corresponding to the sub-line to be detected;
the power grid database is used for storing current and voltage values set on each sub-line to be detected in different lines and storing comparison proportion ranges between allowable detection voltages and specified voltages on each sub-line to be detected;
the signal processing module receives current information sent by each current acquisition unit in the current acquisition module and voltage information sent by each voltage acquisition unit in the voltage acquisition module, compares the received current information on each sub-line to be detected with the current on the sub-line to be detected stored in the power grid database, and sends a current regulation and control instruction to the current regulation module if the current information is smaller than or larger than the current magnitude stored in the power grid database;
meanwhile, the received voltage information of each sub-line to be detected is subtracted from the voltage of the sub-line to be detected stored in the power grid database, an absolute value is obtained, the voltage difference of the absolute value is compared with the voltage stored in the power grid database, a compared proportional value is obtained, if the compared proportional value between the detected voltage and the voltage stored in the power grid database is within a set standard proportional range, the signal processing module does not send a control command to the voltage compensation module, and if the compared proportional value between the detected voltage and the voltage stored in the power grid database is not within the set standard proportional range, the signal processing module sends a voltage control command to the voltage compensation module;
a signal processing module according toReceiving the current and voltage of each sub-line to be detected, and statistically analyzing the stability evaluation coefficient Q of the line ij ，Q ij Is calculated by the formula
Beta is expressed as an influence coefficient, and 0.825 ij Expressed as the current magnitude on the jth to-be-detected sub-line on the ith line, I Notation ij Expressed as the standard current magnitude, U, on the jth line to be detected sub-line on the ith line ij Expressed as the voltage magnitude, U, on the jth line to be detected Index ij The standard voltage is expressed as the standard voltage of the jth sub-line to be detected on the ith line;
according to the stability evaluation coefficient on each sub-line to be detected, counting the integral stability evaluation coefficient corresponding to the power grid
The signal processing module sends the received current and voltage information on each sub-line to be detected to a display terminal, and sends the counted stability evaluation coefficient on each sub-line to be detected and the overall stability evaluation coefficient corresponding to the whole power grid system to the display terminal;
the current adjusting module comprises a plurality of current adjusting units, each current adjusting unit is respectively installed on each sub-line to be detected and is used for receiving a current adjusting and controlling instruction sent by the signal processing module to adjust the current on the sub-line to be detected and sending the adjusted current to the signal processing module until the adjusted current meets the current magnitude stored in the power grid database;
the voltage compensation module comprises a plurality of voltage compensation units, each voltage compensation unit is respectively installed on each sub-line to be detected, and the voltage compensation units are used for receiving voltage control instructions sent by the signal processing module in real time to adjust the voltage on the sub-line to be detected and sending the adjusted voltage to the signal processing module until the comparison proportion value between the voltage in the sub-line to be detected and the voltage stored in the power grid database is within a set standard proportion range;
the display terminal is used for receiving the current and voltage information and the stability evaluation coefficient on each sub-line to be detected sent by the signal processing module and the overall stability evaluation coefficient corresponding to the whole power grid system, and displaying the received current and voltage information and stability evaluation coefficient on each sub-line to be detected and the overall stability evaluation coefficient corresponding to the whole power grid system.
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