CN113625029A - Electric energy metering control method with positioning time service and protection functions - Google Patents
Electric energy metering control method with positioning time service and protection functions Download PDFInfo
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Abstract
The invention relates to an electric energy metering control method with positioning time service and protection functions, which is characterized by comprising the following steps: the method comprises the functions of Beidou or GPS time service positioning, voltage current transformer transformation ratio setting, protection value setting, position information setting, voltage current information acquisition, abnormal or fault condition analysis, calculation and processing, acquired information storage and wave recording, electric energy metering, electric power carrier information uploading and the like, realizes the functions of electric energy metering, system fault diagnosis analysis, system time service, positioning and station area maintenance path planning of a power supply station area, can analyze the problems in real time under the condition that the system is abnormal or has faults, uploads the problems to a monitoring and scheduling center to give specific abnormal fault reasons and position information, and the monitoring and scheduling center discharges corresponding operation and maintenance personnel and path planning information as soon as possible according to the abnormal fault reasons and position information to solve the faults in time.
Description
Technical Field
The invention relates to the technical field of electric energy metering of an intelligent platform area of an electric power system, a low-voltage power utilization system and the like and intelligent diagnosis, protection, analysis and positioning time service of the system, in particular to an electric energy metering control method with positioning time service and protection functions.
Background
With the development of the construction of the power system, the application of the power system is expanded to all corners of the country. And for an electric energy metering system, the system is more ubiquitous. Particularly for remote mountain areas, the platform areas are distributed in places where people are rarely found, and once the system has problems, the conditions that the reason is found, the maintenance is particularly difficult and the power supply recovery period is particularly long are caused. Aiming at the situation, the invention provides the integrated metering device capable of carrying out intelligent diagnosis, analysis, positioning, time service, protection, communication, wave recording and the like, carries out all-around monitoring, diagnosis and protection on the transformer area, and can quickly upload the fault reason and the transformer area position information to a main monitoring and dispatching center after the power failure occurs, so that the fault can be solved at the first time, and the power supply reliability is greatly improved.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide an electric energy metering control method with positioning time service and protection functions, which can analyze the problems in real time when the system has an abnormal or fault condition, and upload the problems to a monitoring and scheduling center to give specific reasons and location information of the abnormal fault, and the monitoring and scheduling center discharges corresponding operation and maintenance personnel and path planning information as soon as possible according to the reasons and location information of the abnormal fault, so that the fault can be solved in time, in order to overcome the defects of the prior art.
In order to solve the technical problems, the invention adopts the technical scheme that: an electric energy metering control method with positioning time service and protection functions is characterized in that: the method comprises the functions of Beidou or GPS time service positioning, voltage and current transformer transformation ratio setting, protection value setting, position information setting, voltage and current information acquisition, abnormal or fault condition analysis, calculation and processing, acquired information storage and wave recording, electric energy metering, electric power carrier information uploading and the like, and under the functions, the electric energy metering, system fault diagnosis and analysis, system time service and positioning and platform area maintenance path planning of a power supply platform area are realized; the method comprises the following steps.
Firstly, setting system related parameters, including setting voltage and current transformer transformation ratios, wherein the transformation ratios are 0, and represent no-voltage current transformers, and upper and lower limit action values of voltage and current; station location information is set.
And secondly, acquiring the voltage and current values of the system through the timed interruption 1, and storing the voltage and current values into different areas according to the states of normal, abnormal or fault and the like of the system operation for analyzing the fault condition of the system.
And thirdly, calculating the amplitude and the effective value of the voltage and the current of the system according to the acquired real-time values of the voltage and the current, and calculating and displaying the electric energy.
And fourthly, judging whether the voltage and current value is out of limit or not, determining the running state of the system according to the amplitude condition, if the system is judged to run to the abnormal condition, comparing and analyzing the voltage and current value and the waveform acquired under the condition with the voltage and current condition under the normal condition by the system, preliminarily giving the abnormal reason of the system, uploading the analyzed reason and result to a centralized unit through a carrier module, and uploading the analyzed reason and result to a monitoring center by the centralized unit to process the abnormal condition of the system.
And fifthly, when the system is judged to be in a fault state, firstly, the protection metering device acts on the outlet circuit breaker to enable the system to break a fault circuit, so that further expansion of the accident is avoided, meanwhile, the system can compare and analyze the voltage current value and the waveform acquired under the condition with the voltage current condition under the normal condition, give out a system fault reason, upload the analysis reason and the result to a centralized unit through a carrier module, and upload the analysis reason and the result to a monitoring center by the centralized unit to process the system fault condition.
And sixthly, regularly acquiring Beidou or GPS time information through the timed interrupt 2 for system time service. For the acquired time information, the system calculates the error between the time information of time service and the time information on the original system, and when the time error is less than or equal to 10ms, the time service acquisition time interval is increased; if the time error is more than 10ms and less than or equal to 50ms, the current time service acquisition time interval is kept; if the time error is more than 50ms, the system can accelerate the time service acquisition time interval. In this case, the system will operate more efficiently.
Preferably, the system information is set in the first step, including setting a transformation ratio of a voltage current transformer configured in the system, and when the transformation ratio is set to zero, the electric energy metering device is indicated to directly collect voltage and current without collecting through the voltage current transformer; meanwhile, the position information of the transformer area needs to be set, so that the transformer area position can be sent in time when the system fails, and the system can plan the path conveniently; and respectively setting action thresholds such as voltage and current under system abnormity and fault, so that the system can accurately judge the operation condition and carry out analysis and judgment.
Preferably, in the second step, the electric energy metering device is preset with voltage and current data and waveforms under normal, abnormal and fault conditions, the data and waveforms are used as standard waveforms for comparison and judgment of data collected in the operation process, and the partial data can exist as a standard database of the system and can be supplemented and perfected according to the operation condition of the system. Meanwhile, the electric energy metering system collects voltage and current information of the system at regular time, the collected voltage and current values are stored to a normal area, an abnormal area and a fault area respectively according to the running state of the system, when the system is convenient to be abnormal or in a fault condition, the collected waveforms are compared with the standard waveforms implanted in advance, and according to the comparison result, the system automatically gives a preliminary analysis result. Meanwhile, for the data stored in different areas, part of the data can be used as standard data and waveforms for later use according to system analysis, and the data can be used as the standard data and the waveforms and can be automatically supplemented into a standard database.
Preferably, in the fourth step, the collected voltage and current information is calculated, the amount of consumed electric energy is calculated, whether the voltage and current value exceeds the preset upper and lower voltage and current limit thresholds is judged, and the system automatically sets the system running state when the voltage and current value exceeds different thresholds, wherein the running state is divided into three types: a normal operation state, an abnormal operation state and a fault operation state; the first two operating states are determined to cause the system to operate normally without tripping. If the system is in an abnormal operation state, the system compares and analyzes data and waveforms acquired in real time with data in an abnormal standard library, gives reasons causing abnormity according to comparison and analysis results, uploads information such as abnormal reasons, early warning signals, station area positions and the like to the centralized unit through the power carrier module, and the centralized unit uploads the information to the monitoring and dispatching center to prompt operation and maintenance personnel to make maintenance arrangement in time. When the collected information exceeds the threshold value of the fault alarm, and the collected value is not an instant value but a stable value, namely the collected information exceeds the fault threshold value after being continuously collected for three times, the control unit can enable the system to act on the outlet relay, and the fault circuit is cut off. When the circuit is cut off, the system can compare the acquired data waveform with a standard fault data waveform pre-stored in the system to give a fault reason, and uploads information such as the fault reason, fault data, fault action signals and station area positions to the centralized unit through the power carrier module, and the information is uploaded to the monitoring and dispatching center by the centralized unit to prompt operation and maintenance personnel to make fault maintenance arrangement in time.
Under the conditions of abnormity and fault, the system sends out position information, and after receiving the position information, the monitoring and scheduling center automatically gives out path planning information leading to a fault point of the transformer area.
Compared with the prior art, the invention has the following advantages: the electric energy metering control method with the positioning time service and protection functions has the advantages that when the system is abnormal or has faults, the problems can be analyzed in real time and uploaded to the monitoring and dispatching center, specific abnormal fault reasons and position information are given, and the monitoring and dispatching center discharges corresponding operation and maintenance personnel and path planning information as soon as possible according to the abnormal fault reasons and the position information, so that the faults are solved in time.
Drawings
FIG. 1 is a main control flow diagram of the present invention.
FIG. 2 is a flow chart of the timed interrupt 1 interrupt of the present invention.
FIG. 3 is a flow chart of the timed interrupt 2 interrupt of the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples.
As shown in FIGS. 1 to 3: an electric energy metering control method with positioning time service and protection functions is characterized in that: the control method comprises the functions of Beidou or GPS time service positioning, voltage-current transformer transformation ratio setting, protection value setting, position information setting, voltage-current information acquisition, abnormal or fault condition analysis, calculation and processing, acquired information storage and wave recording, electric energy metering, electric power carrier information uploading and the like, and under the functions, the electric energy metering, system fault diagnosis and analysis, system time service and positioning and platform area maintenance path planning of a power supply platform area are realized; the method comprises the following steps.
Firstly, system information is set, the transformation ratio of a voltage current transformer configured by the system is set, when the transformation ratio is set to be zero, the electric energy metering device is indicated to directly collect voltage and current without collecting through the voltage current transformer, and station area position information is required to be set at the same time, so that when the system breaks down, the station area position is timely sent, and the path planning of the system is facilitated; and respectively setting action thresholds such as voltage and current under system abnormity and fault, so that the system can accurately judge the operation condition and carry out analysis and judgment.
The electric energy metering device is preset with voltage and current data and waveforms under normal, abnormal and fault conditions, the data and the waveforms are used as standard waveforms for comparison and judgment of data collected in the operation process, and the partial data can exist as a standard database of the system and can be supplemented and perfected according to the operation condition of the system.
Meanwhile, the electric energy metering system interrupts the acquisition system for time 1, the acquired voltage and current values are respectively stored to a normal area, an abnormal area and a fault area according to the running state of the system, the acquired waveforms are compared with the standard waveforms implanted in advance when the system is convenient to be abnormal or in fault, and the system automatically gives out a preliminary analysis result according to the comparison result.
Meanwhile, for the data stored in different areas, part of the data can be used as standard data and waveforms for later use according to system analysis, and the data can be used as the standard data and the waveforms and can be automatically supplemented into a standard database. And calculating the acquired voltage and current information, and judging whether the voltage and current value exceeds the preset upper and lower voltage and current limit threshold values or not, and if so, exceeding different threshold values.
The system can automatically set the running state of the system, and the running state is divided into three types: a normal operation state, an abnormal operation state and a fault operation state; the first two operating states are determined to cause the system to operate normally without tripping. If the system is in an abnormal operation state, the system can compare and analyze the data and the waveforms acquired in real time with the data in the abnormal standard library.
And according to the comparison and analysis result, giving out the reason causing the abnormality, uploading information such as the abnormality reason, the early warning signal, the station area position and the like to the centralized unit through the power carrier module, and uploading the information to the monitoring and dispatching center by the centralized unit to prompt operation and maintenance personnel to timely make maintenance arrangement.
When the collected information exceeds the threshold value of the fault alarm, and the collected value is not an instant value but a stable value, namely the collected information exceeds the fault threshold value after being continuously collected for three times, the control unit can enable the system to act on the outlet relay, and the fault circuit is cut off.
When the circuit is cut off, the system can compare the acquired data waveform with a standard fault data waveform stored in the system in advance, give a fault reason, and upload information such as the fault reason, fault data, a fault action signal, a station area position and the like to the centralized unit through the power carrier module.
And the central unit uploads the data to a monitoring and scheduling center to prompt operation and maintenance personnel to make fault maintenance arrangement in time. Under the conditions of abnormity and fault, the system sends out position information, and after receiving the position information, the monitoring and scheduling center automatically gives out path planning information leading to a fault point of the transformer area.
The system can regularly gather big dipper or GPS time information. The system collects Beidou or GPS time information through the timed interrupt 2 and is used for system time service. For the acquired time information, the system calculates the error between the time information of time service and the time information on the original system, and when the time error is less than or equal to 10ms, the time service time acquisition interval is increased; if the time error is more than 10ms and less than or equal to 50ms, the current time service acquisition time interval is kept; if the time error is more than 50ms, the system can accelerate the time service acquisition time interval. In this case, the system will operate more efficiently.
The electric energy metering control method with the positioning time service and protection functions has the advantages that when the system is abnormal or has faults, the problems can be analyzed in real time and uploaded to the monitoring and dispatching center, specific abnormal fault reasons and position information are given, and the monitoring and dispatching center discharges corresponding operation and maintenance personnel and path planning information as soon as possible according to the abnormal fault reasons and the position information, so that the faults are solved in time.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modification, change and equivalent changes of the above embodiments according to the technical essence of the invention are still within the protection scope of the technical solution of the invention.
Claims (5)
1. An electric energy metering control method with positioning time service and protection functions is characterized in that: the method comprises the functions of Beidou or GPS time service positioning, voltage and current transformer transformation ratio setting, protection value setting, position information setting, voltage and current information acquisition, abnormal or fault condition analysis, calculation and processing, acquired information storage and wave recording, electric energy metering, electric power carrier information uploading and the like, and under the functions, the electric energy metering, system fault diagnosis and analysis, system time service and positioning and platform area maintenance path planning of a power supply platform area are realized; the method comprises the following steps:
firstly, setting system related parameters, including setting voltage and current transformer transformation ratios, wherein the transformation ratios are 0, and represent no-voltage current transformers, and upper and lower limit action values of voltage and current; setting the position information of the distribution room;
secondly, acquiring a system voltage and current value through a timed interrupt 1, and storing the acquired voltage and current value into different areas according to the state of the system running in normal, abnormal or fault and the like for analyzing the system fault condition;
thirdly, calculating the amplitude and the effective value of the voltage and the current of the system according to the acquired real-time values of the voltage and the current, and calculating and displaying electric energy;
fourthly, judging whether the voltage and current value is out of limit or not, determining the running state of the system according to the amplitude condition, if the system is judged to run to the abnormal condition, comparing and analyzing the voltage and current value and the waveform acquired under the condition with the voltage and current condition under the normal condition by the system, preliminarily giving the abnormal reason of the system, uploading the analyzed reason and result to a centralized unit through a carrier module, uploading the analyzed reason and result to a monitoring center by the centralized unit, and processing the abnormal condition of the system;
fifthly, when the system is judged to be in a fault state, firstly, the protection metering device acts on an outlet circuit breaker to enable the system to break a fault circuit, further expansion of an accident is avoided, meanwhile, the system can perform comparative analysis according to the voltage current value and the waveform acquired under the condition and the voltage current condition under the normal condition to give a system fault reason, the analysis reason and the result are uploaded to a centralized unit through a carrier module, and the centralized unit uploads the analysis reason and the result to a monitoring center and processes the system fault condition;
the sixth step, regularly acquiring Beidou or GPS time information through a timed interrupt 2 for system time service, calculating the error between the time information of the time service and the time information on the original system by the system for the acquired time information, and increasing the time service acquisition time interval when the time error is less than or equal to 10 ms; if the time error is more than 10ms and less than or equal to 50ms, the current time service acquisition time interval is kept; if the time error is more than 50ms, the system can accelerate the time service acquisition time interval. In this case, the system will operate more efficiently.
2. The electric energy metering control method with the positioning time service and protection functions as claimed in claim 1, characterized in that: the first step is to set system information, including setting the transformation ratio of a voltage current transformer configured by the system, and when the transformation ratio is set to be zero, the electric energy metering device is indicated to directly collect voltage and current without collecting through the voltage current transformer; meanwhile, the position information of the transformer area needs to be set, so that the transformer area position can be sent in time when the system fails, and the system can plan the path conveniently; and respectively setting action thresholds such as voltage and current under system abnormity and fault, so that the system can accurately judge the operation condition and carry out analysis and judgment.
3. The electric energy metering control method with the positioning time service and protection functions as claimed in claim 1, characterized in that: in the second step, the electric energy metering device is preset with voltage and current data and waveforms under normal, abnormal and fault conditions, the data and the waveforms are used as standard waveforms for comparison and judgment of data collected in the operation process, and the partial data can exist as a standard database of the system and can be supplemented and perfected according to the operation condition of the system. Meanwhile, the electric energy metering system collects voltage and current information of the system at regular time, the collected voltage and current values are stored to a normal area, an abnormal area and a fault area respectively according to the running state of the system, when the system is convenient to be abnormal or in a fault condition, the collected waveforms are compared with the standard waveforms implanted in advance, and according to the comparison result, the system automatically gives a preliminary analysis result. Meanwhile, for the data stored in different areas, part of the data can be used as standard data and waveforms for later use according to system analysis, and the data can be used as the standard data and the waveforms and can be automatically supplemented into a standard database.
4. The electric energy metering control method with the positioning time service and protection functions as claimed in claim 1, characterized in that: and in the fourth step, the collected voltage and current information is calculated, the power consumption is calculated, whether the voltage and current value exceeds the preset upper and lower limit thresholds of the voltage and current is judged, and the system can automatically set the running state of the system when the voltage and current value exceeds different thresholds, wherein the running state is divided into three types: a normal operation state, an abnormal operation state and a fault operation state; the first two operating states are determined to cause the system to operate normally without tripping. If the system is in an abnormal operation state, the system compares and analyzes data and waveforms acquired in real time with data in an abnormal standard library, gives reasons causing abnormity according to comparison and analysis results, uploads information such as abnormal reasons, early warning signals, station area positions and the like to the centralized unit through the power carrier module, and the centralized unit uploads the information to the monitoring and dispatching center to prompt operation and maintenance personnel to make maintenance arrangement in time. When the collected information exceeds the threshold value of the fault alarm, and the collected value is not an instant value but a stable value, namely the collected information exceeds the fault threshold value after being continuously collected for three times, the control unit can enable the system to act on the outlet relay, and the fault circuit is cut off. When the circuit is cut off, the system can compare the acquired data waveform with a standard fault data waveform pre-stored in the system to give a fault reason, and uploads information such as the fault reason, fault data, fault action signals and station area positions to the centralized unit through the power carrier module, and the information is uploaded to the monitoring and dispatching center by the centralized unit to prompt operation and maintenance personnel to make fault maintenance arrangement in time.
5. The electric energy metering control method with the positioning time service and protection functions as claimed in claim 4, characterized in that: under the conditions of abnormity and fault, the system sends out position information, and after receiving the position information, the monitoring and scheduling center automatically gives out path planning information leading to a fault point of the transformer area.
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