CN110736865A - three-phase user electricity stealing judgment and positioning method - Google Patents
three-phase user electricity stealing judgment and positioning method Download PDFInfo
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- CN110736865A CN110736865A CN201911236192.5A CN201911236192A CN110736865A CN 110736865 A CN110736865 A CN 110736865A CN 201911236192 A CN201911236192 A CN 201911236192A CN 110736865 A CN110736865 A CN 110736865A
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Abstract
The invention provides a three-phase user electricity stealing judgment and positioning method which mainly comprises the steps of acquiring signals, analyzing layer by layer according to information acquired by signal acquisition equipment at each level, judging whether electric energy meters work normally or not by detecting CT, judging users with abnormal electricity consumption in a step if the electric energy meters work normally, sending abnormal information to electricity consumption inspectors, judging specific abnormal conditions in a step , and making final judgment.
Description
Technical Field
The invention belongs to the technical field of power utilization detection, and particularly relates to an three-phase user electricity stealing judgment and positioning method.
Background
Along with the development of various large and medium-sized industrial enterprises in China, the power consumption is also increased rapidly and is driven by benefits, electricity stealing behaviors of large-power customers are more and more serious, and electricity stealing technologies and electricity stealing modes are more and more diversified. The electricity stealing behavior threatens the economic benefits of power enterprises, greatly influences the stable development of the power industry in China and brings great potential safety hazards to the production and life of people. In the face of diversified electricity stealing modes and higher electricity stealing technologies, the power industry has to adopt more advanced electricity stealing prevention scientific and technical measures. At present, the state network company requires that the meters are completely replaced by novel intelligent meters, and although the novel intelligent meters have great help on electricity larceny prevention, the electric power enterprises need scientific and effective advanced monitoring technology to achieve the purpose of electricity larceny prevention.
The invention provides methods for judging and positioning electricity stealing of three-phase users, which analyze layer by layer according to the information collected by signal collecting equipment at each level, detect CT to eliminate misjudgment caused by sensor fault, find and accurately judge specific abnormal users in time when abnormal electricity utilization occurs, find and further stop electricity stealing behavior in time, improve the accuracy of solving a case and shorten the time of solving a case.
Disclosure of Invention
The invention provides methods for judging and positioning electricity stealing of three-phase users, which can preliminarily find and position users with abnormal electricity utilization and prevent electricity stealing behavior.
The invention specifically relates to an three-phase user electricity stealing judgment and positioning method, which comprises the following steps:
step (1): acquiring an active power signal of a special transformer acquisition terminal and an active power signal of an electric energy concentrator;
step (2): calculating the sum of active power signals of the electric energy concentrator;
and (3): calculating the difference value between the sum of the active power signals of the electric energy concentrator and the active power of the special transformer acquisition terminal;
and (4): judging whether the difference value between the sum of the active power signals of the electric energy concentrator and the active power of the special transformer acquisition terminal is greater than a power difference value reference value or not, if so, entering the step (5); if not, returning to the step (1);
collecting th detection CT signals of the electric energy concentrator;
calculating the current difference value between the current signal collected by the electric energy concentrator and the th detection CT signal of the electric energy concentrator;
and (7): judging whether the current difference value is larger than a current difference value reference value or not, if so, metering CT faults by the electric energy concentrator, and entering the step (8); if not, entering the step (12);
step (8), calculating the active power of the electric energy concentrator according to the th detection CT signal of the electric energy concentrator;
and (9): recalculating the total active power of the electric energy concentrator according to the active power of the electric energy concentrator calculated in the step (8);
step (10): calculating the difference value between the total active power of the electric energy concentrator obtained in the step (9) and the active power collected by the special transformer collecting terminal;
step (11): judging whether the power difference value is larger than a power difference value reference value, if so, entering a step (12); if not, returning to the step (1);
step (12): collecting a second detection CT signal of the electric energy concentrator;
calculating a difference between an th detected CT signal of the power concentrator and a second detected CT signal of the power concentrator;
finding the power concentrator corresponding to the power concentrator with the difference value between the th detection CT signal and the second detection CT signal of the power concentrator larger than the CT difference reference value, namely the power concentrator is a three-phase line with abnormal power utilization;
step (15): collecting current signals of a three-phase multifunctional electric energy meter and detecting CT signals;
step (16): calculating the difference value between the current signal of the three-phase multifunctional electric energy meter and the detection CT signal;
step (17): and finding the three-phase multifunctional electric energy meter corresponding to the difference value between the current signal of the three-phase multifunctional electric energy meter and the detection CT signal greater than the reference value of the current difference value of the user, namely the three-phase multifunctional electric energy meter is the electricity user with abnormal electricity utilization.
The special transformer acquisition terminal is installed on the high-voltage side of the 10kV line and comprises a voltage transformer, a current transformer and an electric energy meter which are matched with each other.
The electric energy concentrator is connected with the three-phase multifunctional electric energy meters through RS485 and collects three-phase voltage, current, active power, reactive power, forward active maximum demand, forward electric energy metering information and reverse electric energy metering information.
And , notifying the electricity inspection personnel to check and confirm on site, and making a final judgment.
Wherein, the electric energy concentrator th detection CT is installed the electric energy concentrator is qualified for the next round of competitions the side, the electric energy concentrator second detects the CT and installs the electric energy concentrator is advanced the line side, three-phase multifunctional electric energy meter detects the CT and installs three-phase multifunctional electric energy meter is advanced the line side.
Compared with the prior art, the beneficial effects are: the electricity stealing judgment and positioning method analyzes layer by layer according to information acquired by signal acquisition equipment at all levels, eliminates misjudgment caused by sensor faults by matching with detection CT, and more accurately determines users with abnormal electricity utilization.
Detailed Description
The specific implementation of three-phase user electricity stealing determination and location methods of the present invention will be described in detail below.
The three-phase user electricity stealing judgment and positioning method is mainly used for judging whether an electricity stealing behavior exists in a three-phase electricity user, monitoring whether the electricity using behavior of people is legal or not and maintaining the electricity using order.
The method for judging and positioning the electricity stealing of the three-phase user mainly comprises the steps of collecting active power signals of a special transformer collecting terminal and active power signals of an electric energy concentrator, calculating the sum of the active power signals of the electric energy concentrator, calculating the difference between the sum of the active power signals of the electric energy concentrator and the active power signals of the special transformer collecting terminal, judging whether the difference between the sum of the active power signals of the electric energy concentrator and the active power signals of the special transformer collecting terminal is larger than a power difference reference value, if yes, entering step (5), if not, returning to step (1), collecting a third step of the electric energy concentrator to detect CT signals, step (6) calculating the current difference between the current signals collected by the electric energy concentrator and a third step of the electric energy concentrator, step (7) judging whether the current difference value is larger than the current difference reference value, if yes, entering step (8), entering step (12), detecting the current difference between the electric energy concentrator and the electric energy concentrator according to a third step of detecting the electric energy concentrator, calculating the current difference value, if yes, the current difference value is larger than the current difference value, entering step (7) of the CT detection step (7) of the step (7), entering step (7), judging whether the current difference value is larger than the current difference value, entering a third step (7), if yes, the step (7) of the step (7), the step of the electric energy concentrator, entering the step (7), entering the step of detecting the step of the electric energy concentrator, entering step (7), entering step of detecting the electric energy concentrator, entering step (12), entering the step of detecting the three-step of detecting the three-phase concentrator, entering the step of detecting the three-phase concentrator, entering step of the step of collecting the step of detecting the step of the current difference of the three-step of collecting the three-step of the current difference of the three-step (7), entering step of collecting the step (7), entering step of the three-phase concentrator), entering.
The special transformer acquisition terminal is arranged on the high-voltage side of the 10kV line and comprises a voltage transformer, a current transformer and an electric energy meter which are matched;
the electric energy concentrator is connected with a plurality of three-phase multifunctional electric energy meters through RS485 and collects three-phase voltage, current, active power, reactive power, forward active maximum demand, forward electric energy metering information and reverse electric energy metering information; the three-phase multifunctional electric energy meter adopts an intelligent electric energy meter.
The th detection CT of the electric energy concentrator is installed on the outgoing line side of the electric energy concentrator, the second detection CT of the electric energy concentrator is installed on the incoming line side of the electric energy concentrator, and the detection CT of the three-phase multifunctional electric energy meter is installed on the incoming line side of the three-phase multifunctional electric energy meter.
The information collected by the special transformer collecting terminal, the electric energy concentrator and the three-phase multifunctional electric energy meter is transmitted to the control processing equipment through the optical fiber, and then the analysis and judgment are carried out by adopting the method.
And determining a second power difference value reference value, a CT difference value reference value and a user current difference value reference value according to the line loss of different lines.
The power utilization users with abnormal power utilization are preliminarily judged by adopting the judging and positioning method, power utilization inspectors are informed to carry out on-site inspection and confirmation, final judgment is made, and power utilization validity of the power utilization users is guaranteed.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1, three-phase user electricity stealing judging and positioning method, characterized in that, the judging and positioning method includes the following steps:
step (1): acquiring an active power signal of a special transformer acquisition terminal and an active power signal of an electric energy concentrator;
step (2): calculating the sum of active power signals of the electric energy concentrator;
and (3): calculating the difference value between the sum of the active power signals of the electric energy concentrator and the active power of the special transformer acquisition terminal;
and (4): judging whether the difference value between the sum of the active power signals of the electric energy concentrator and the active power of the special transformer acquisition terminal is greater than a power difference value reference value or not, if so, entering the step (5); if not, returning to the step (1);
collecting th detection CT signals of the electric energy concentrator;
calculating the current difference value between the current signal collected by the electric energy concentrator and the th detection CT signal of the electric energy concentrator;
and (7): judging whether the current difference value is larger than a current difference value reference value or not, if so, metering CT faults by the electric energy concentrator, and entering the step (8); if not, entering the step (12);
step (8), calculating the active power of the electric energy concentrator according to the th detection CT signal of the electric energy concentrator;
and (9): recalculating the total active power of the electric energy concentrator according to the active power of the electric energy concentrator calculated in the step (8);
step (10): calculating the difference value between the total active power of the electric energy concentrator obtained in the step (9) and the active power collected by the special transformer collecting terminal;
step (11): judging whether the power difference value is larger than a power difference value reference value, if so, entering a step (12); if not, returning to the step (1);
step (12): collecting a second detection CT signal of the electric energy concentrator;
calculating a difference between an th detected CT signal of the power concentrator and a second detected CT signal of the power concentrator;
finding the power concentrator corresponding to the power concentrator with the difference value between the th detection CT signal and the second detection CT signal of the power concentrator larger than the CT difference reference value, namely the power concentrator is a three-phase line with abnormal power utilization;
step (15): collecting current signals of a three-phase multifunctional electric energy meter and detecting CT signals;
step (16): calculating the difference value between the current signal of the three-phase multifunctional electric energy meter and the detection CT signal;
step (17): and finding the three-phase multifunctional electric energy meter corresponding to the difference value between the current signal of the three-phase multifunctional electric energy meter and the detection CT signal greater than the reference value of the current difference value of the user, namely the three-phase multifunctional electric energy meter is the electricity user with abnormal electricity utilization.
2. The method for judging and locating the stealing of electricity by three-phase users according to claim 1, wherein the special transformer collection terminal is installed at the high-voltage side of the 10kV line and comprises a voltage transformer, a current transformer and an electric energy meter;
the electric energy concentrator is connected with a plurality of three-phase multifunctional electric energy meters through RS485 and collects three-phase voltage, current, active power, reactive power, forward active maximum demand, forward electric energy metering information and reverse electric energy metering information.
3. The method for determining and locating the theft of electricity by three-phase users as claimed in claim 2, wherein the th test CT of the electric energy concentrator is installed at the outgoing side of the electric energy concentrator, the second test CT of the electric energy concentrator is installed at the incoming side of the electric energy concentrator, and the test CT of the three-phase multifunctional electric energy meter is installed at the incoming side of the three-phase multifunctional electric energy meter.
4. The method for determining and locating the stealing of electricity by three-phase users as claimed in claim 1, wherein the inspector is informed to check the abnormal users on site to make the final determination.
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| CN113589219A (en) * | 2021-08-18 | 2021-11-02 | 南通通明集团有限公司 | Electric energy metering abnormity identification method containing nonlinear load |
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