Three-phase three-wire electric energy meter fault judgment method and system based on power direction

Abstract

The invention discloses a three-phase three-wire electric energy meter fault judgment method and system based on a power direction, relates to the field of intelligent electric energy meter detection, and can accurately judge faults such as voltage phase sequence and phase error, current phase sequence and phase error, polarity reversal and the like of a three-phase three-wire intelligent electric energy meter in various complex load power flow states. And the judgment accuracy is improved. The method comprises the following steps: continuously acquiring electrical parameters displayed by the three-phase three-wire intelligent electric energy meter according to a preset acquisition period; performing fault judgment on the electrical parameters by adopting a preset voltage judgment rule, a preset current judgment rule and a preset power judgment rule to obtain a voltage judgment result, a current judgment result and a power judgment result; if the voltage judgment result, the current judgment result and the power judgment result all indicate that rule conditions are met, determining that the current acquisition moment is a fault moment, and counting a count value of the fault moment; and when the count value meets a fault frequency threshold value, determining that the three-phase three-wire intelligent meter has a fault, and triggering a fault signal.

Description

Technical Field

[0001] The present application relates to the technical field of intelligent electric energy meter detection, and in particular to a method and system for determining faults of a three-phase three-wire electric energy meter based on power direction. Background Art

[0002] At present, when relevant staff detect whether a three-phase three-wire smart energy meter has a fault, they need to use three-phase energy meter field testers, electricity consumption testers and other equipment to access the three-phase three-wire smart energy meter terminal box to determine the inductive load and capacitive load of the three-phase three-wire smart energy meter, and the voltage phase sequence and phase errors, current phase sequence and phase errors, reverse polarity and other faults under various complex load flow conditions.

[0003] Various complex load flow states refer to quadrants I, II, III, and IV under inductive and capacitive load states.

[0004] In the process of implementing this application, the applicant found that the related technology has at least the following problems:

[0005] To determine whether a three-phase three-wire smart electricity meter is faulty on site, the personnel involved in metering, meter installation, power connection, and electricity usage inspection must have high professional skills and rich practical experience. However, the skill levels of the personnel involved in metering, meter installation, power connection, and electricity usage inspection vary widely, resulting in serious risks such as metering errors, electricity disputes, abnormal line losses, and safety accidents, leading to low efficiency and accuracy in fault judgment. Summary of the invention

[0006] In view of this, the present application provides a three-phase three-wire electric energy meter fault judgment method, device, computer equipment and computer-readable storage medium based on power direction. The main purpose is to solve the current problems of low efficiency and accuracy in fault judgment of three-phase three-wire intelligent electric energy meters.

[0007] According to the first aspect of the present application, a method for determining a fault of a three-phase three-wire electric energy meter based on power direction is provided, the method comprising:

[0008] Continuously collect electrical parameters displayed by the three-phase three-wire smart energy meter according to the preset collection cycle;

[0009] Using a preset voltage judgment rule, a preset current judgment rule, and a preset power judgment rule to perform fault judgment on the electrical parameters, and obtain a voltage judgment result, a current judgment result, and a power judgment result;

[0010] If the voltage judgment result, the current judgment result and the power judgment result all indicate that the rule conditions are met, determining the current acquisition moment as the fault moment, and counting the count value at the fault moment;

[0011] When the count value meets the fault number threshold, it is determined that the three-phase three-wire smart meter has a fault, and a fault signal is triggered, so that the metering and detection personnel can perform fault processing on the three-phase three-wire smart electric energy meter based on the fault signal.

[0012] Optionally, the adopting a preset voltage judgment rule to perform fault judgment on the electrical parameter to obtain a voltage judgment result includes:

[0013] Determine the rated voltage of the three-phase three-wire smart electric energy meter, and calculate the product of the rated voltage and a preset voltage coefficient;

[0014] Reading the voltage value corresponding to the first element and the voltage value corresponding to the second element in the electrical parameters;

[0015] If the voltage value corresponding to the first element is greater than or equal to the product, and the voltage value corresponding to the second element is greater than or equal to the product, a voltage judgment result indicating that the rule condition is met is generated.

[0016] Optionally, the adopting a preset current judgment rule to perform fault judgment on the electrical parameter to obtain a current judgment result includes:

[0017] Determine the rated current of the three-phase three-wire smart electric energy meter, calculate a first product of the rated current and a first current preset coefficient and a second product of the rated current and a second current preset coefficient;

[0018] Reading a first current value corresponding to a first element and a second current value corresponding to a second element in the electrical parameters, and comparing an absolute value of the first current value and an absolute value of the second current value with a first interval, respectively, where the first interval is a closed interval consisting of the first product and the second product;

[0019] If the absolute value of the first current value hits the first interval, and the absolute value of the second current value hits the first interval, extracting the absolute value with the largest value from the absolute values ​​of the first current value and the second current value as the first absolute value, and the remaining absolute value after the extraction as the second absolute value, and calculating the difference between the first absolute value and the second absolute value, and determining the ratio of the difference to the first absolute value;

[0020] If the percentage corresponding to the ratio is less than or equal to the preset percentage, a current judgment result indicating that the rule condition is met is generated.

[0021] Optionally, the adopting a preset current judgment rule to perform fault judgment on the electrical parameter to obtain a current judgment result includes:

[0022] Determine the maximum current value of the three-phase three-wire smart electric energy meter;

[0023] comparing the absolute value of the first current value and the absolute value of the second current value with a second interval respectively, where the second interval is a half-open interval consisting of the maximum current value and the first product;

[0024] If the absolute value of the first current value hits the second interval, and the absolute value of the second current value hits the second interval, extracting the absolute value with the largest value from the absolute value of the first current value and the absolute value of the second current value as the first absolute value, and the remaining absolute value after the extraction as the second absolute value, and calculating the difference between the first absolute value and the second absolute value;

[0025] If the difference hits the preset threshold range, a current determination result indicating that the rule condition is satisfied is generated.

[0026] Optionally, the using a preset power judgment rule to perform fault judgment on the electrical parameter to obtain a power judgment result includes:

[0027] Reading power parameters from the electrical parameters, the power parameters including a total active power value, a total reactive power value, an active power value of the first element, a reactive power value of the first element, and an active power value of the second element and a reactive power value of the second element;

[0028] Determine a target direction combination corresponding to the power parameter, and compare the target direction combination with each preset direction combination in a plurality of preset direction combinations;

[0029] If there is no preset direction combination that is consistent with the target direction combination, a power judgment result indicating that the rule condition is met is generated.

[0030] Optionally, the plurality of preset direction combinations include:

[0031] The total active power value, the first element active power value, the second element active power value, the total reactive power value and the first element reactive power value are in the positive direction, and the second element reactive power value is in the negative direction;

[0032] The total active power value, the first element active power value, the second element active power value, the total reactive power value, the first element reactive power value, and the second element reactive power value are positive;

[0033] The total active power value, the second element active power value, the total reactive power value, the first element reactive power value, and the second element reactive power value are in the positive direction, and the first element active power value is in the negative direction;

[0034] The total active power value, the first element active power value, the second element active power value and the first element reactive power value are in the positive direction, and the total reactive power value and the second element reactive power value are in the negative direction;

[0035] The total active power value, the first element active power value and the second element active power value are in the positive direction, and the total reactive power value, the first element reactive power value and the second element reactive power value are in the negative direction;

[0036] The total active power value and the first element active power value are in the positive direction, and the second element active power value, the total reactive power value, the first element reactive power value, and the second element reactive power value are in the negative direction;

[0037] The reactive power value of the second element is in the forward direction, and the total active power value, the active power value of the first element, the active power value of the second element, the total reactive power value and the reactive power value of the first element are in the reverse direction;

[0038] The total active power value, the first element active power value, the second element active power value, the total reactive power value, the first element reactive power value, and the second element reactive power value are in opposite directions;

[0039] The active power value of the first element is in the forward direction, and the total active power value, the active power value of the second element, the total reactive power value, the reactive power value of the first element, and the reactive power value of the second element are in the reverse direction;

[0040] The total reactive power value and the second element reactive power value are in the positive direction, and the total active power value, the first element active power value, the second element active power value, and the first element reactive power value are in the negative direction;

[0041] The total active power value, the first element active power value, and the second element active power value are in the reverse direction, and the total reactive power value, the first element reactive power value, and the second element reactive power value are in the forward direction;

[0042] The total active power value and the first element active power value are in opposite directions, and the second element active power value, the total reactive power value, the first element reactive power value, and the second element reactive power value are in positive directions.

[0043] Optionally, the electrical parameters include a total active power value, a total reactive power value, a voltage value corresponding to the first element, a current value corresponding to the first element, an active power value corresponding to the first element, a reactive power value corresponding to the first element, and a voltage value corresponding to the second element, a current value corresponding to the second element, an active power value corresponding to the second element, and a reactive power value corresponding to the second element.

[0044] According to the second aspect of the present application, a three-phase three-wire electric energy meter fault judgment system is provided, the system comprising:

[0045] A collection module, used to continuously collect electrical parameters displayed by a three-phase three-wire smart energy meter according to a preset collection cycle;

[0046] A judgment module, used to perform fault judgment on the electrical parameters by using a preset voltage judgment rule, a preset current judgment rule and a preset power judgment rule to obtain a voltage judgment result, a current judgment result and a power judgment result;

[0047] A statistical module, configured to determine that the current acquisition moment is a fault moment, and to count the count value at the fault moment if the voltage judgment result, the current judgment result, and the power judgment result all indicate that the rule condition is satisfied;

[0048] The determination module is used to determine that the three-phase three-wire smart meter has a fault when the count value meets the fault number threshold, and trigger a fault signal so that the metering and detection personnel can perform fault processing on the three-phase three-wire smart electric energy meter based on the fault signal.

[0049] Optionally, a judgment module is used to determine the rated voltage of the three-phase three-wire smart electric energy meter, calculate the product of the rated voltage and a preset voltage coefficient; read the voltage value corresponding to the first element and the voltage value corresponding to the second element in the electrical parameters; if the voltage value corresponding to the first element is greater than or equal to the product, and the voltage value corresponding to the second element is greater than or equal to the product, then generate a voltage judgment result indicating that the rule conditions are met.

[0050] Optionally, a judgment module is used to determine the rated current of the three-phase three-wire intelligent energy meter, calculate the first product of the rated current and a first current preset coefficient and the second product of the rated current and a second current preset coefficient; read a first current value corresponding to the first element and a second current value corresponding to the second element in the electrical parameters, and compare the absolute value of the first current value and the absolute value of the second current value with a first interval respectively, and the first interval is a closed interval composed of the first product and the second product; if the absolute value of the first current value hits the first interval, and the absolute value of the second current value hits the first interval, then the absolute value with the largest value is extracted from the absolute value of the first current value and the absolute value of the second current value as the first absolute value, and the absolute value remaining after extraction is taken as the second absolute value, and the difference between the first absolute value and the second absolute value is calculated, and the ratio of the difference to the first absolute value is determined; if the percentage corresponding to the ratio is less than or equal to the preset percentage, a current judgment result indicating that the rule condition is met is generated.

[0051] Optionally, a judgment module is used to determine the maximum current value of the three-phase three-wire smart electric energy meter; compare the absolute value of the first current value and the absolute value of the second current value with a second interval respectively, the second interval is a half-open interval consisting of the maximum current value and the first product; if the absolute value of the first current value hits the second interval, and the absolute value of the second current value hits the second interval, then the absolute value with the largest value among the absolute values ​​of the first current value and the absolute values ​​of the second current value is extracted as the first absolute value, the remaining absolute value after extraction is taken as the second absolute value, and the difference between the first absolute value and the second absolute value is calculated; if the difference hits the preset threshold range, a current judgment result is generated to indicate that the rule condition is met.

[0052] Optionally, a judgment module is used to read power parameters from the electrical parameters, the power parameters including a total active power value, a total reactive power value, an active power value of a first element, a reactive power value of a first element, and an active power value of a second element and a reactive power value of a second element; determine a target direction combination corresponding to the power parameters, and compare the target direction combination with each preset direction combination in a plurality of preset direction combinations; if there is no preset direction combination that is consistent with the target direction combination, generate a power judgment result indicating that the rule conditions are met.

[0053] Optionally, the multiple preset direction combinations include: the total active power value, the active power value of the first element, the active power value of the second element, the total reactive power value and the reactive power value of the first element are in the forward direction, and the reactive power value of the second element is in the reverse direction; the total active power value, the active power value of the first element, the active power value of the second element, the total reactive power value, the reactive power value of the first element and the reactive power value of the second element are in the forward direction; the total active power value, the active power value of the second element, the total reactive power value, the reactive power value of the first element and the reactive power value of the second element are in the forward direction, The active power value of one element is in the reverse direction; the total active power value, the active power value of the first element, the active power value of the second element and the reactive power value of the first element are in the forward direction, and the total reactive power value and the reactive power value of the second element are in the reverse direction; the total active power value, the active power value of the first element and the active power value of the second element are in the forward direction, and the total reactive power value, the reactive power value of the first element and the reactive power value of the second element are in the reverse direction; the total active power value and the active power value of the first element are in the forward direction, and the active power value of the second element, the total reactive power value, the reactive power value of the first element and the reactive power value of the second element are in the reverse direction The reactive power value is in the reverse direction; the reactive power value of the second element is in the forward direction, and the total active power value, the active power value of the first element, the active power value of the second element, the total reactive power value and the reactive power value of the first element are in the reverse direction; the total active power value, the active power value of the first element, the active power value of the second element, the total reactive power value, the reactive power value of the first element and the reactive power value of the second element are in the reverse direction; the active power value of the first element is in the forward direction, and the total active power value, the active power value of the second element, the total reactive power value, the reactive power value of the first element and the reactive power value of the second element are Reverse; the total reactive power value and the reactive power value of the second element are forward, and the total active power value, the active power value of the first element, the active power value of the second element, and the reactive power value of the first element are reverse; the total active power value, the active power value of the first element, and the active power value of the second element are reverse, and the total reactive power value, the reactive power value of the first element, and the reactive power value of the second element are forward; the total active power value and the active power value of the first element are reverse, and the active power value of the second element, the total reactive power value, the reactive power value of the first element, and the reactive power value of the second element are forward.

[0054] Optionally, the electrical parameters include a total active power value, a total reactive power value, a voltage value corresponding to the first element, a current value corresponding to the first element, an active power value corresponding to the first element, a reactive power value corresponding to the first element, and a voltage value corresponding to the second element, a current value corresponding to the second element, an active power value corresponding to the second element, and a reactive power value corresponding to the second element.

[0055] According to a third aspect of the present application, a computer device is provided, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of any one of the methods described in the first aspect when executing the computer program.

[0056] According to a fourth aspect of the present application, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps of any one of the methods described in the first aspect are implemented.

[0057] By means of the above technical scheme, the present application provides a method and system for fault judgment of a three-phase three-wire electric energy meter based on power direction. The present application first continuously collects the electrical parameters displayed by the three-phase three-wire smart electric energy meter according to the preset collection cycle. Subsequently, the preset voltage judgment rule, the preset current judgment rule and the preset power judgment rule are used to perform fault judgment on the electrical parameters to obtain the voltage judgment result, the current judgment result and the power judgment result. If the voltage judgment result, the current judgment result and the power judgment result all indicate that the rule conditions are met, the current collection moment is determined to be the fault moment, and the count value at the fault moment is counted. Finally, when the count value meets the fault number threshold, it is determined that the three-phase three-wire smart meter has a fault, and a fault signal is triggered, so that the metering and detection personnel can perform fault processing on the three-phase three-wire smart electric energy meter based on the fault signal. Through automated data collection and fault judgment, potential problems in smart electric energy meters can be discovered faster and more accurately. This not only saves human resources, but also reduces misjudgments due to human factors. Under the condition of basically symmetrical load, it can accurately judge the inductive load and capacitive load of the three-phase three-wire smart electricity meter, the voltage phase sequence and phase error, current phase sequence and phase error, reverse polarity and other faults under various complex load flow conditions, and improve the judgment accuracy.

[0058] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0060] Figure 1 A schematic flow chart of a method for determining a fault of a three-phase three-wire electric energy meter based on power direction provided in an embodiment of the present application is shown;

[0061] Figure 2 A schematic flow chart of a method for determining a fault of a three-phase three-wire electric energy meter based on power direction provided in an embodiment of the present application is shown;

[0062] Figure 3 The phasor diagram provided by the embodiment of the present application is shown;

[0063] Figure 4 A schematic structural diagram of a three-phase three-wire electric energy meter fault judgment system based on power direction provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0064] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0065] At present, when relevant staff detect whether a three-phase three-wire smart energy meter has a fault, they need to use a three-phase energy meter field tester, a power consumption tester and other equipment to connect to the three-phase three-wire smart energy meter terminal box to judge the three-phase three-wire smart energy meter's inductive load and capacitive load, voltage phase sequence and phase difference errors, current phase sequence and phase difference errors, polarity reverse connection and other faults under various complex load flow conditions. However, the applicant recognizes that in order to judge whether a three-phase three-wire smart energy meter has a fault on site, personnel such as metering, meter installation and power connection, and power consumption inspection must have a high level of professional skills and rich practical experience. However, the skill levels of personnel such as metering, meter installation and power connection, and power consumption inspection are uneven, resulting in serious risks such as metering errors, power disputes, abnormal line losses, and safety accidents, resulting in low efficiency and accuracy of fault judgment. Therefore, an embodiment of the present application provides a three-phase three-wire energy meter fault judgment method based on power direction, first of all, continuously collecting electrical parameters displayed by the three-phase three-wire smart energy meter according to a preset collection period. Subsequently, the preset voltage judgment rule, the preset current judgment rule and the preset power judgment rule are used to judge the fault of the electrical parameters, and the voltage judgment result, the current judgment result and the power judgment result are obtained. If the voltage judgment result, the current judgment result and the power judgment result all indicate that the rule conditions are met, the current acquisition time is determined to be the fault time, and the count value at the fault time is counted. Finally, when the count value meets the fault number threshold, it is determined that the three-phase three-wire smart meter has a fault, and the fault signal is triggered so that the metering and detection personnel can handle the fault of the three-phase three-wire smart energy meter based on the fault signal. Through automated data collection and fault judgment, potential problems in the smart energy meter can be discovered faster and more accurately. This not only saves human resources, but also reduces misjudgments caused by human factors. Under the basic symmetrical load state, the three-phase three-wire smart energy meter can be accurately judged for inductive load and capacitive load, voltage phase sequence and phase difference errors, current phase sequence and phase difference errors, polarity reverse connection and other faults under various complex load flow states, and the judgment accuracy can be improved.

[0066] The present application embodiment provides a method for determining a fault of a three-phase three-wire electric energy meter based on power direction, such as Figure 1 As shown, the method includes:

[0067] 101. Continuously collect the electrical parameters displayed by the three-phase three-wire smart energy meter according to the preset collection cycle.

[0068] In the embodiment of the present application, the measurement and detection personnel can pre-set the preset collection period on the system, such as 1 hour, 30 minutes, etc., so that in actual detection, the system can continuously collect the electrical parameters displayed by the three-phase three-wire intelligent energy meter to be tested according to the preset collection period. The length of the preset collection period is not specifically limited in the present application. The collected electrical parameters include the total active power value, the total reactive power value, the voltage value corresponding to the first element, the current value corresponding to the first element, the active power value corresponding to the first element, the reactive power value corresponding to the first element, and the voltage value corresponding to the second element, the current value corresponding to the second element, the active power value corresponding to the second element, and the reactive power value corresponding to the second element.

[0069] 102. Use a preset voltage judgment rule, a preset current judgment rule, and a preset power judgment rule to perform fault judgment on electrical parameters to obtain a voltage judgment result, a current judgment result, and a power judgment result.

[0070] In the actual detection process, the system uses preset voltage judgment rules, preset current judgment rules and preset power judgment rules to judge the faults of different parameter values ​​in the electrical parameters, and then obtains three judgment results, namely voltage judgment result, current judgment result and power judgment result. In the actual operation process, if these three judgment results all indicate that the rule conditions are met, it means that the three-phase three-wire smart energy meter at the current acquisition time may have a fault. At this time, the current acquisition time is recorded as the fault time, that is, the following step 103 is executed. If any of the three judgment results indicates that the rule conditions are not met, it means that the three-phase three-wire smart energy meter at the current time does not have a fault, and there is no need to record the current acquisition time.

[0071] 103. If the voltage judgment result, the current judgment result, and the power judgment result all indicate that the rule conditions are met, the current collection time is determined to be the fault time, and the count value at the fault time is counted.

[0072] In this step, if the voltage judgment result, current judgment result and power judgment result all indicate that the rule conditions are met, it means that the three-phase three-wire smart energy meter at the current collection time has a fault, and the current collection time is recorded as the fault time. Then, the count value at the fault time is increased by 1, the count value at the fault time is counted, and the count value is compared with the fault number threshold.

[0073] 104. When the count value meets the fault number threshold, it is determined that the three-phase three-wire smart meter has a fault, and a fault signal is triggered, so that the metering and detection personnel can perform fault processing on the three-phase three-wire smart electric energy meter based on the fault signal.

[0074] In this step, when the count value meets the fault number threshold, it is determined that the three-phase three-wire smart meter has a fault. At this time, a fault signal will be triggered and sent to the detection terminal where the metering and detection personnel are located to inform the metering and detection personnel that the three-phase three-wire smart electric energy meter has a fault, and then perform specific maintenance or replacement of parts and other operations to repair the electric energy meter fault.

[0075] The method provided in the embodiment of the present application first continuously collects the electrical parameters displayed by the three-phase three-wire smart energy meter according to the preset collection cycle. Subsequently, the preset voltage judgment rule, the preset current judgment rule and the preset power judgment rule are used to perform fault judgment on the electrical parameters to obtain voltage judgment results, current judgment results and power judgment results. If the voltage judgment result, the current judgment result and the power judgment result all indicate that the rule conditions are met, the current collection time is determined to be the fault time, and the count value at the fault time is counted. Finally, when the count value meets the fault number threshold, it is determined that the three-phase three-wire smart meter has a fault, and a fault signal is triggered so that the metering and detection personnel can perform fault processing on the three-phase three-wire smart energy meter based on the fault signal. Through automated data collection and fault judgment, potential problems in the smart energy meter can be discovered faster and more accurately. This not only saves human resources, but also reduces misjudgments caused by human factors. Under the basic symmetrical load state, the three-phase three-wire smart energy meter can be accurately judged for inductive load and capacitive load, voltage phase sequence and phase difference errors, current phase sequence and phase difference errors, polarity reverse connection and other faults under various complex load flow states, and the judgment accuracy is improved.

[0076] The present application embodiment provides a method for determining a fault of a three-phase three-wire electric energy meter based on power direction, such as Figure 2 As shown, the method includes:

[0077] 201. Continuously collect electrical parameters displayed by the three-phase three-wire smart energy meter according to a preset collection cycle.

[0078] The measurement and testing personnel can set a preset collection period on the system in advance, such as 1 hour, 30 minutes, etc., so that during the actual detection, the system can continuously collect the electrical parameters displayed by the three-phase three-wire smart energy meter to be tested according to the preset collection period. This application does not specifically limit the length of the preset collection period. The collected electrical parameters include the total active power value, the total reactive power value, the voltage value corresponding to the first element, the current value corresponding to the first element, the active power value corresponding to the first element, the reactive power value corresponding to the first element, and the voltage value corresponding to the second element, the current value corresponding to the second element, the active power value corresponding to the second element, and the reactive power value corresponding to the second element. For example, for a 10kV special transformer user, the metering method is high supply and high metering, and a three-phase three-wire smart energy meter is used for measurement. The voltage specification is 3×100V, the current specification is 3×1.5(6)A, the rated secondary current In of the current transformer is 5A, and the maximum current Imax is 6A. The total active power, total reactive power, and the voltage, current, active power, reactive power and other parameters of the first and second components of the smart energy meter at a sampling moment are as follows:

[0079] Parameters of the smart energy meter: rated voltage Un = 100V, rated current In = 1.5A, maximum current Imax = 6A, power P = -127.41W, reactive power Q = 16.21var. Parameters of the first component: voltage Uab = 102.2V, current Ia = -1.26A, power Pa = -50.30W, reactive power Qa = 118.55var. Parameters of the second component: voltage Ucb = 102.5V, current Ic = 1.25A, power Pc = -77.11W, reactive power Qc = -102.33var.

[0080] 202. Use a preset voltage judgment rule to perform fault judgment on electrical parameters to obtain a voltage judgment result.

[0081] In the embodiment of the present application, for the electrical parameters collected at each collection moment, the preset voltage judgment rule, the preset current judgment rule and the preset power judgment rule are respectively used to perform fault judgment, and the present application does not specifically limit the judgment order of the judgment rules. In this step, firstly, the process of using the preset voltage judgment rule to perform fault judgment on the electrical parameters and obtaining the voltage judgment result is described:

[0082] Specifically, the system first determines the rated voltage U of the three-phase three-wire smart energy meter n , then calculate the rated voltage U n Next, read the voltage value U corresponding to the first element in the electrical parameters. ab The voltage value U corresponding to the second element cbIf the voltage value corresponding to the first element is greater than or equal to the product, and the voltage value corresponding to the second element is greater than or equal to the product, a voltage judgment result indicating that the rule condition is met is generated, that is, U ab and U cb The following formula 1 and formula 2 are satisfied, and a voltage determination result indicating that the rule condition is satisfied is generated.

[0083] Formula 1: U ab ≥0.9U n

[0084] Formula 2: U cb ≥0.9U n

[0085] It should be noted that if U ab or U cb If the above formula 1 and formula 2 are not satisfied, a voltage determination result indicating that the rule condition is not satisfied is generated.

[0086] 203. Use preset current judgment rules to perform fault judgment on electrical parameters to obtain current judgment results.

[0087] In this step, the fault judgment of the electrical parameters is performed using the preset current judgment rule, and the current judgment result is described:

[0088] Specifically, the preset current judgment rule includes two sub-rules. The following describes the process of using the first sub-rule to perform fault judgment. Specifically, the system first determines the rated current I of the three-phase three-wire smart energy meter. n In actual operation, the current transformer with a rated secondary current of 5A I n The rated secondary current of the current transformer is 1A. n is 0.3A. Then, calculate the rated current I n The first product of the first current preset coefficient 50% and the rated current I n Then, the first current value I corresponding to the first element is read in the electrical parameters. a The second current value I corresponding to the second element c , the absolute value of the first current value |I a | and the absolute value of the second current value |I c | are compared with the first interval respectively, wherein the first interval is a closed interval consisting of the first product and the second product. If the absolute value of the first current value |I a | hits the first interval, and the absolute value of the second current value |I c |Hit the first interval, i.e. |I a |and|I c|If the following formula 3 and formula 4 are satisfied, the absolute value with the largest value is extracted from the absolute value of the first current value and the absolute value of the second current value as the first absolute value, and the remaining absolute value after extraction is used as the second absolute value, and the following formula 5 is used to determine whether to generate a current judgment result indicating that the rule condition is satisfied. Specifically, the difference between the first absolute value and the second absolute value is calculated, and the ratio of the difference to the first absolute value is determined. If the percentage corresponding to the ratio is less than or equal to the preset percentage of 20%, a current judgment result indicating that the rule condition is satisfied is generated.

[0089] Formula 3: 50% I n ≥|I a |≥5%I n

[0090] Formula 4: 50% I n ≥|I c |≥5%I n

[0091] Formula 5:

[0092] It should be noted that if |I a |or|I c |If the above formula 3 and formula 4 are satisfied, or the ratio of the difference between the first absolute value and the second absolute value to the first absolute value does not satisfy the above formula 5, a voltage judgment result indicating that the rule condition is not satisfied is generated.

[0093] The following describes the process of fault judgment using the second sub-rule. The system first determines the maximum current value I of the three-phase three-wire smart energy meter. Max . The absolute value of the first current value |I a | and the absolute value of the second current value |I c | are compared with the second interval respectively, where the second interval is composed of the maximum current value I Max and the first product 50%I n If the absolute value of the first current value hits the second interval, and the absolute value of the second current value hits the second interval, that is, |I a |and|I c |If the following formula 6 and formula 7 are satisfied, the absolute value with the largest value is extracted from the absolute value of the first current value and the absolute value of the second current value as the first absolute value, and the remaining absolute value after extraction is used as the second absolute value, and the following formula 8 is used to determine whether to generate a current judgment result indicating that the rule condition is satisfied. Specifically, the difference between the first absolute value and the second absolute value is calculated. If the difference hits the preset threshold range, a current judgment result indicating that the rule condition is satisfied is generated.

[0094] Formula 6: I max≥|I a |>50%I n

[0095] Formula 7: I max ≥|I c |>50%I n

[0096] Formula 8: 0 ≤ the maximum absolute value of the two-phase current - the minimum absolute value of the two-phase current ≤ 0.2A

[0097] It should be noted that if |I a |or|I c |If the above formula 6 and formula 7 are not satisfied, or the difference between the first absolute value and the second absolute value does not satisfy the above formula 8, a voltage judgment result indicating that the rule condition is not satisfied is generated. Continuing to take the above 10kV special transformer user as an example, the two-phase current satisfies the above formula 6 and formula 7, and the maximum absolute value I′ of the two-phase current Max =I a , the minimum absolute value of the two-phase current I′ min =I c , at this time, the above formula 8 is satisfied, and a current judgment result indicating that the rule condition is satisfied can be generated.

[0098] 204. Use preset power judgment rules to perform fault judgment on electrical parameters to obtain a power judgment result.

[0099] In this step, the total active power, total reactive power, and the active power and reactive power of the first element and the second element will have the following 12 direction combinations, and the 12 combinations are in an "or" relationship. Specifically, the first direction combination under quadrant I is that the total active power value, the active power value of the first element, the active power value of the second element, the total reactive power value, and the reactive power value of the first element are in the positive direction, and the reactive power value of the second element is in the negative direction. The second direction combination is that the total active power value, the active power value of the first element, the active power value of the second element, the total reactive power value, the reactive power value of the first element, and the reactive power value of the second element are in the positive direction. The third direction combination is that the total active power value, the active power value of the second element, the total reactive power value, the reactive power value of the first element, and the reactive power value of the second element are in the positive direction, and the active power value of the first element is in the negative direction. The fourth direction combination under quadrant IV is that the total active power value, the active power value of the first element, the active power value of the second element, and the reactive power value of the first element are in the positive direction, and the total reactive power value and the reactive power value of the second element are in the negative direction. The fifth direction combination is that the total active power value, the first element active power value, and the second element active power value are in the positive direction, and the total reactive power value, the first element reactive power value, and the second element reactive power value are in the negative direction. The sixth direction combination is that the total active power value and the first element active power value are in the positive direction, and the second element active power value, the total reactive power value, the first element reactive power value, and the second element reactive power value are in the negative direction. The seventh direction combination under quadrant III is that the second element reactive power value is in the positive direction, and the total active power value, the first element active power value, the second element active power value, the total reactive power value, and the first element reactive power value are in the negative direction. The eighth direction combination is that the total active power value, the first element active power value, the second element active power value, the total reactive power value, the first element reactive power value, and the second element reactive power value are in the negative direction. The ninth direction combination is that the first element active power value is in the positive direction, and the total active power value, the second element active power value, the total reactive power value, the first element reactive power value, and the second element reactive power value are in the negative direction. The tenth direction combination in quadrant II is that the total reactive power value and the second element reactive power value are in the positive direction, and the total active power value, the first element active power value, the second element active power value, and the first element reactive power value are in the negative direction. The eleventh direction combination is that the total active power value, the first element active power value, and the second element active power value are in the negative direction, and the total reactive power value, the first element reactive power value, and the second element reactive power value are in the positive direction. The twelfth direction combination is that the total active power value and the first element active power value are in the negative direction, and the second element active power value, the total reactive power value, the first element reactive power value, and the second element reactive power value are in the positive direction. It should be noted that the positive direction indicates that the value is greater than 0, and the negative direction indicates that the value is less than 0.

[0100] The system reads the power parameters in the electrical parameters, and the power parameters include the total active power value, the total reactive power value, the active power value of the first element, the reactive power value of the first element, and the active power value of the second element and the reactive power value of the second element. Determine the target direction combination corresponding to the power parameter, and compare the target direction combination with each of the above 12 preset direction combinations. If there is no preset direction combination that is consistent with the target direction combination, a power judgment result is generated to indicate that the rule condition is met. If there is any preset direction combination that is consistent with the target direction combination, a power judgment result is generated to indicate that the rule condition is not met.

[0101] Continuing to take the above 10kV special transformer user as an example, the total active power, total reactive power, and the voltage, current, active power, and reactive power direction of the first and second components of the three-phase three-wire smart energy meter are shown in Table 1 below:

[0102] Table 1

[0103] Serial number parameter Numeric Power direction 1 Total active power P -127.41W Reverse 2 The first component active power P1 -50.30W Reverse 3 The second component active power P2 -77.11W Reverse 4 Total reactive power Q 16.21var Positive 5 The first element reactive power Q1 118.55var Positive 6 The second component reactive power Q2 -102.33var Reverse

[0104] If the directions of the six parameters, namely, active power, reactive power, total active power and total reactive power, of the first element and the second element of the three-phase three-wire smart electric energy meter do not satisfy any of the above 12 preset direction combinations, a power judgment result indicating that the rule conditions are met can be generated.

[0105] Phase diagram Figure 3 As shown, the angle is:

[0106] The wiring of the three-phase three-wire smart energy meter is as follows: That is, the first set of components is connected The second set of components is connected There is a wiring error fault.

[0107] 205. If the voltage judgment result, the current judgment result, and the power judgment result all indicate that the rule conditions are met, the current collection time is determined to be a fault time, and the count value at the fault time is counted.

[0108] In this step, if the voltage judgment result, the current judgment result, and the power judgment result all indicate that the rule conditions are met, it means that the three-phase three-wire smart energy meter at the current collection time has a fault, and the current collection time is recorded as the fault time. Then, the count value at the fault time is increased by 1, the count value at the fault time is counted, and the count value is compared with the fault number threshold. For example, if the collection is 24 full points per day, the count value exceeds 12, that is, more than 12 points meet the above three conditions at the same time, then the "three-phase three-wire energy meter fault" signal is triggered. If the collection is 96 points per day, the count value exceeds 48, that is, more than 48 points meet the above three conditions at the same time, then the "three-phase three-wire energy meter fault" signal is triggered. The number of points can also be adjusted according to the accuracy of the fault judgment mathematical model.

[0109] 206. When the count value meets the fault number threshold, it is determined that the three-phase three-wire smart meter has a fault, and a fault signal is triggered.

[0110] In this step, when the count value meets the fault number threshold, it is determined that the three-phase three-wire smart meter has a fault, and a fault signal will be triggered at this time. The fault signal is sent to the detection terminal where the metering and testing personnel are located to inform the metering and testing personnel that the three-phase three-wire smart energy meter has a fault, and then perform specific maintenance or replacement of parts to repair the energy meter fault. The faults of the three-phase three-wire smart energy meter include but are not limited to voltage phase sequence and phase errors, current phase sequence and phase errors, reverse polarity and other faults under various complex load flow conditions.

[0111] The method provided in the embodiment of the present application first continuously collects the electrical parameters displayed by the three-phase three-wire smart energy meter according to the preset collection cycle. Subsequently, the preset voltage judgment rule, the preset current judgment rule and the preset power judgment rule are used to perform fault judgment on the electrical parameters to obtain voltage judgment results, current judgment results and power judgment results. If the voltage judgment result, the current judgment result and the power judgment result all indicate that the rule conditions are met, the current collection time is determined to be the fault time, and the count value at the fault time is counted. Finally, when the count value meets the fault number threshold, it is determined that the three-phase three-wire smart meter has a fault, and a fault signal is triggered so that the metering and detection personnel can perform fault processing on the three-phase three-wire smart energy meter based on the fault signal. Through automated data collection and fault judgment, potential problems in the smart energy meter can be discovered faster and more accurately. This not only saves human resources, but also reduces misjudgments caused by human factors. Under the basic symmetrical load state, the three-phase three-wire smart energy meter can be accurately judged for inductive load and capacitive load, voltage phase sequence and phase difference errors, current phase sequence and phase difference errors, polarity reverse connection and other faults under various complex load flow states, and the judgment accuracy is improved.

[0112] Further, as Figure 1The specific implementation of the method, the embodiment of the present application provides a three-phase three-wire electric energy meter fault judgment system based on power direction, such as Figure 4 As shown, the system includes: a collection module 401, a judgment module 402, a statistics module 404, and a determination module 404.

[0113] The acquisition module 401 is used to continuously acquire electrical parameters displayed by the three-phase three-wire smart energy meter according to a preset acquisition cycle;

[0114] The judgment module 402 is used to perform fault judgment on the electrical parameters by using a preset voltage judgment rule, a preset current judgment rule and a preset power judgment rule to obtain a voltage judgment result, a current judgment result and a power judgment result;

[0115] The statistical module 404 is used to determine that the current acquisition time is a fault time if the voltage judgment result, the current judgment result and the power judgment result all indicate that the rule condition is satisfied, and to count the count value at the fault time;

[0116] The determination module 404 is used to determine that the three-phase three-wire smart meter has a fault when the count value meets the fault number threshold, and trigger a fault signal so that the metering and detection personnel can perform fault processing on the three-phase three-wire smart electric energy meter based on the fault signal.

[0117] In a specific application scenario, the judgment module 402 is used to determine the rated voltage of the three-phase three-wire smart power meter, calculate the product of the rated voltage and the preset voltage coefficient; read the voltage value corresponding to the first element and the voltage value corresponding to the second element in the electrical parameters; if the voltage value corresponding to the first element is greater than or equal to the product, and the voltage value corresponding to the second element is greater than or equal to the product, then generate a voltage judgment result indicating that the rule conditions are met.

[0118] In a specific application scenario, the judgment module 402 is used to determine the rated current of the three-phase three-wire smart energy meter, calculate the first product of the rated current and the first current preset coefficient and the second product of the rated current and the second current preset coefficient; read the first current value corresponding to the first element and the second current value corresponding to the second element in the electrical parameter, and compare the absolute value of the first current value and the absolute value of the second current value with the first interval respectively, and the first interval is a closed interval composed of the first product and the second product; if the absolute value of the first current value hits the first interval, and the absolute value of the second current value hits the first interval, then the absolute value with the largest value is extracted from the absolute value of the first current value and the absolute value of the second current value as the first absolute value, and the absolute value remaining after extraction is used as the second absolute value, and the difference between the first absolute value and the second absolute value is calculated, and the ratio of the difference to the first absolute value is determined; if the percentage corresponding to the ratio is less than or equal to the preset percentage, a current judgment result indicating that the rule condition is met is generated.

[0119] In a specific application scenario, the judgment module 402 is used to determine the maximum current value of the three-phase three-wire smart energy meter; compare the absolute value of the first current value and the absolute value of the second current value with the second interval respectively, and the second interval is a half-open interval consisting of the maximum current value and the first product; if the absolute value of the first current value hits the second interval, and the absolute value of the second current value hits the second interval, then the absolute value with the largest value among the absolute values ​​of the first current value and the second current value is extracted as the first absolute value, the remaining absolute value after extraction is used as the second absolute value, and the difference between the first absolute value and the second absolute value is calculated; if the difference hits the preset threshold range, a current judgment result indicating that the rule condition is met is generated.

[0120] In a specific application scenario, the judgment module 402 is used to read power parameters from the electrical parameters, wherein the power parameters include a total active power value, a total reactive power value, an active power value of a first element, a reactive power value of a first element, and an active power value of a second element and a reactive power value of a second element; determine a target direction combination corresponding to the power parameters, and compare the target direction combination with each preset direction combination in a plurality of preset direction combinations; if there is no preset direction combination that is consistent with the target direction combination, generate a power judgment result indicating that the rule conditions are met.

[0121] In a specific application scenario, the multiple preset direction combinations include: the total active power value, the active power value of the first element, the active power value of the second element, the total reactive power value and the reactive power value of the first element are in the forward direction, and the reactive power value of the second element is in the reverse direction; the total active power value, the active power value of the first element, the active power value of the second element, the total reactive power value, the reactive power value of the first element and the reactive power value of the second element are in the forward direction; the total active power value, the active power value of the second element, the total reactive power value, the reactive power value of the first element and the reactive power value of the second element are in the reverse direction. is forward, and the active power value of the first element is reverse; the total active power value, the active power value of the first element, the active power value of the second element and the reactive power value of the first element are forward, and the total reactive power value and the reactive power value of the second element are reverse; the total active power value, the active power value of the first element and the active power value of the second element are forward, and the total reactive power value, the reactive power value of the first element and the reactive power value of the second element are reverse; the total active power value and the active power value of the first element are forward, and the active power value of the second element, the total reactive power value, the reactive power value of the first element and the reactive power value of the first element are reverse. The reactive power value of the second element is in the reverse direction; the reactive power value of the second element is in the forward direction, and the total active power value, the active power value of the first element, the active power value of the second element, the total reactive power value and the reactive power value of the first element are in the reverse direction; the total active power value, the active power value of the first element, the active power value of the second element, the total reactive power value, the reactive power value of the first element and the reactive power value of the second element are in the reverse direction; the active power value of the first element is in the forward direction, and the total active power value, the active power value of the second element, the total reactive power value, the reactive power value of the first element and the reactive power value of the second element are in the reverse direction. The value is in reverse direction; the total reactive power value and the second element reactive power value are in forward direction, and the total active power value, the first element active power value, the second element active power value, and the first element reactive power value are in reverse direction; the total active power value, the first element active power value, and the second element active power value are in reverse direction, and the total reactive power value, the first element reactive power value, and the second element reactive power value are in forward direction; the total active power value and the first element active power value are in reverse direction, and the second element active power value, the total reactive power value, the first element reactive power value, and the second element reactive power value are in forward direction.

[0122] In a specific application scenario, the electrical parameters include a total active power value, a total reactive power value, a voltage value corresponding to the first element, a current value corresponding to the first element, an active power value corresponding to the first element, a reactive power value corresponding to the first element, and a voltage value corresponding to the second element, a current value corresponding to the second element, an active power value corresponding to the second element, and a reactive power value corresponding to the second element.

[0123] The system provided in the embodiment of the present application first continuously collects the electrical parameters displayed by the three-phase three-wire smart energy meter according to the preset collection cycle. Subsequently, the preset voltage judgment rule, the preset current judgment rule and the preset power judgment rule are used to perform fault judgment on the electrical parameters to obtain voltage judgment results, current judgment results and power judgment results. If the voltage judgment result, the current judgment result and the power judgment result all indicate that the rule conditions are met, the current collection time is determined to be the fault time, and the count value at the fault time is counted. Finally, when the count value meets the fault number threshold, it is determined that the three-phase three-wire smart meter has a fault, and a fault signal is triggered so that the metering and detection personnel can perform fault processing on the three-phase three-wire smart energy meter based on the fault signal. Through automated data collection and fault judgment, potential problems in the smart energy meter can be discovered faster and more accurately. This not only saves human resources, but also reduces misjudgments caused by human factors. Under the basic symmetrical load state, the three-phase three-wire smart energy meter can be accurately judged for inductive load and capacitive load, voltage phase sequence and phase difference errors, current phase sequence and phase difference errors, polarity reverse connection and other faults under various complex load flow states, and the judgment accuracy is improved.

[0124] It should be noted that for other corresponding descriptions of the functional units involved in the three-phase three-wire electric energy meter fault judgment system based on power direction provided in the embodiment of the present application, reference can be made to Figure 1 and Figure 2 The corresponding description in will not be repeated here.

[0125] In an exemplary embodiment, a device is also provided, which includes a communication bus, a processor, a memory and a communication interface, and may also include an input and output interface and a display device, wherein each functional unit can communicate with each other through the bus. The memory stores a computer program, and the processor is used to execute the program stored in the memory and execute the three-phase three-wire electric energy meter fault judgment method based on power direction in the above embodiment.

[0126] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the method for determining a three-phase three-wire electric energy meter fault based on power direction.

[0127] Through the description of the above implementation methods, those skilled in the art can clearly understand that the present application can be implemented by hardware, or by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each implementation scenario of the present application.

[0128] Those skilled in the art will appreciate that the accompanying drawings are merely schematic diagrams of a preferred implementation scenario, and the modules or processes in the accompanying drawings are not necessarily required for implementing the present application.

[0129] Those skilled in the art will appreciate that the modules in the device in the implementation scenario can be distributed in the device in the implementation scenario according to the implementation scenario description, or can be changed accordingly and located in one or more devices different from the implementation scenario. The modules in the above implementation scenario can be combined into one module, or can be further split into multiple sub-modules.

[0130] The above application serial numbers are for description only and do not represent the advantages or disadvantages of the implementation scenarios.

[0131] The above disclosure only discloses several specific implementation scenarios of the present application. However, the present application is not limited thereto, and any changes that can be conceived by technicians in this field should fall within the scope of protection of the present application.

Claims

1. A method for determining a three-phase three-wire electric energy meter fault based on power direction, characterized in that: include: Continuously collect electrical parameters displayed by the three-phase three-wire smart energy meter according to the preset collection cycle; Using a preset voltage judgment rule, a preset current judgment rule, and a preset power judgment rule to perform fault judgment on the electrical parameters, and obtain a voltage judgment result, a current judgment result, and a power judgment result; If the voltage judgment result, the current judgment result and the power judgment result all indicate that the rule conditions are met, determining the current acquisition moment as the fault moment, and counting the count value at the fault moment; When the count value meets the fault number threshold, it is determined that the three-phase three-wire smart meter has a fault, and a fault signal is triggered, so that the metering and detection personnel can perform fault processing on the three-phase three-wire smart electric energy meter based on the fault signal.

2. The method according to claim 1, characterized in that The method of using a preset voltage judgment rule to perform fault judgment on the electrical parameters to obtain a voltage judgment result includes: Determine the rated voltage of the three-phase three-wire smart electric energy meter, and calculate the product of the rated voltage and a preset voltage coefficient; Reading the voltage value corresponding to the first element and the voltage value corresponding to the second element in the electrical parameters; If the voltage value corresponding to the first element is greater than or equal to the product, and the voltage value corresponding to the second element is greater than or equal to the product, a voltage judgment result indicating that the rule condition is met is generated.

3. The method according to claim 1, characterized in that The method of using a preset current judgment rule to perform fault judgment on the electrical parameters to obtain a current judgment result includes: Determine the rated current of the three-phase three-wire smart electric energy meter, calculate a first product of the rated current and a first current preset coefficient and a second product of the rated current and a second current preset coefficient; Reading a first current value corresponding to a first element and a second current value corresponding to a second element in the electrical parameters, and comparing an absolute value of the first current value and an absolute value of the second current value with a first interval, respectively, where the first interval is a closed interval consisting of the first product and the second product; If the absolute value of the first current value hits the first interval, and the absolute value of the second current value hits the first interval, extracting the absolute value with the largest value from the absolute values ​​of the first current value and the second current value as the first absolute value, and the remaining absolute value after the extraction as the second absolute value, and calculating the difference between the first absolute value and the second absolute value, and determining the ratio of the difference to the first absolute value; If the percentage corresponding to the ratio is less than or equal to the preset percentage, a current judgment result indicating that the rule condition is met is generated.

4. The method according to claim 3, characterized in that The method of using a preset current judgment rule to perform fault judgment on the electrical parameters to obtain a current judgment result includes: Determine the maximum current value of the three-phase three-wire smart electric energy meter; comparing the absolute value of the first current value and the absolute value of the second current value with a second interval respectively, where the second interval is a half-open interval consisting of the maximum current value and the first product; If the absolute value of the first current value hits the second interval, and the absolute value of the second current value hits the second interval, extracting the absolute value with the largest value from the absolute value of the first current value and the absolute value of the second current value as the first absolute value, and the remaining absolute value after the extraction as the second absolute value, and calculating the difference between the first absolute value and the second absolute value; If the difference hits the preset threshold range, a current determination result indicating that the rule condition is satisfied is generated.

5. The method according to claim 1, characterized in that The method of using a preset power judgment rule to perform fault judgment on the electrical parameters to obtain a power judgment result includes: Reading power parameters from the electrical parameters, the power parameters including a total active power value, a total reactive power value, an active power value of the first element, a reactive power value of the first element, and an active power value of the second element and a reactive power value of the second element; Determine a target direction combination corresponding to the power parameter, and compare the target direction combination with each preset direction combination in a plurality of preset direction combinations; If there is no preset direction combination that is consistent with the target direction combination, a power judgment result indicating that the rule condition is met is generated.

6. The method according to claim 5, characterized in that The plurality of preset direction combinations include: The total active power value, the first element active power value, the second element active power value, the total reactive power value and the first element reactive power value are in the positive direction, and the second element reactive power value is in the negative direction; The total active power value, the first element active power value, the second element active power value, the total reactive power value, the first element reactive power value, and the second element reactive power value are positive; The total active power value, the second element active power value, the total reactive power value, the first element reactive power value, and the second element reactive power value are in the positive direction, and the first element active power value is in the negative direction; The total active power value, the first element active power value, the second element active power value and the first element reactive power value are in the positive direction, and the total reactive power value and the second element reactive power value are in the negative direction; The total active power value, the first element active power value and the second element active power value are in the positive direction, and the total reactive power value, the first element reactive power value and the second element reactive power value are in the negative direction; The total active power value and the first element active power value are in the positive direction, and the second element active power value, the total reactive power value, the first element reactive power value, and the second element reactive power value are in the negative direction; The reactive power value of the second element is in the forward direction, and the total active power value, the active power value of the first element, the active power value of the second element, the total reactive power value and the reactive power value of the first element are in the reverse direction; The total active power value, the first element active power value, the second element active power value, the total reactive power value, the first element reactive power value, and the second element reactive power value are in opposite directions; The active power value of the first element is in the forward direction, and the total active power value, the active power value of the second element, the total reactive power value, the reactive power value of the first element, and the reactive power value of the second element are in the reverse direction; The total reactive power value and the second element reactive power value are in the positive direction, and the total active power value, the first element active power value, the second element active power value, and the first element reactive power value are in the negative direction; The total active power value, the first element active power value, and the second element active power value are in the reverse direction, and the total reactive power value, the first element reactive power value, and the second element reactive power value are in the forward direction; The total active power value and the first element active power value are in opposite directions, and the second element active power value, the total reactive power value, the first element reactive power value, and the second element reactive power value are in positive directions.

7. The method according to claim 1, characterized in that The electrical parameters include a total active power value, a total reactive power value, a voltage value corresponding to the first element, a current value corresponding to the first element, an active power value corresponding to the first element, a reactive power value corresponding to the first element, and a voltage value corresponding to the second element, a current value corresponding to the second element, an active power value corresponding to the second element, and a reactive power value corresponding to the second element.

8. A three-phase three-wire electric energy meter fault judgment system based on power direction, characterized in that: include: A collection module, used to continuously collect electrical parameters displayed by a three-phase three-wire smart energy meter according to a preset collection cycle; A judgment module, used to perform fault judgment on the electrical parameters by using a preset voltage judgment rule, a preset current judgment rule and a preset power judgment rule to obtain a voltage judgment result, a current judgment result and a power judgment result; A statistical module, configured to determine that the current acquisition moment is a fault moment, and to count the count value at the fault moment if the voltage judgment result, the current judgment result, and the power judgment result all indicate that the rule condition is satisfied; The determination module is used to determine that the three-phase three-wire smart meter has a fault when the count value meets the fault number threshold, and trigger a fault signal so that the metering and detection personnel can perform fault processing on the three-phase three-wire smart electric energy meter based on the fault signal.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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