CN116893383A

CN116893383A - Waveform precision detection method and device for power distribution terminal

Info

Publication number: CN116893383A
Application number: CN202310618982.XA
Authority: CN
Inventors: 梁伟宸; 王亚娟; 刘博�; 田琪; 李烜
Original assignee: State Grid Corp of China SGCC; North China Electric Power Research Institute Co Ltd
Current assignee: State Grid Corp of China SGCC; North China Electric Power Research Institute Co Ltd
Priority date: 2023-05-29
Filing date: 2023-05-29
Publication date: 2023-10-17

Abstract

The specification provides a waveform precision detection method and device for a power distribution terminal. The method comprises the following steps: acquiring voltage data and current data; determining a voltage detection result of the power distribution terminal according to the voltage data; wherein the voltage detection result includes: applying a steady-state voltage error detection result, a voltage harmonic content error detection result, a voltage recording error detection result and a voltage time scale error detection result; determining a current detection result of the power distribution terminal according to the current data; wherein the current detection result includes: applying a steady-state current error detection result and a current harmonic content error detection result; determining a target detection result of the power distribution terminal according to the voltage detection result of the power distribution terminal and the current detection result of the power distribution terminal; and under the condition that the target detection result is passing, determining that the waveform precision of the power distribution terminal meets the requirement. Based on the method, the waveform precision of the power distribution terminal can be detected more comprehensively and accurately, and the operation safety of the power grid is ensured.

Description

Waveform precision detection method and device for power distribution terminal

Technical Field

The specification belongs to the technical field of power distribution terminal detection, and particularly relates to a waveform precision detection method and device for a power distribution terminal.

Background

In the electric power field, parameters such as phase voltage, zero sequence voltage, phase current, zero sequence current and the like of a power grid need to be measured by using a power distribution terminal, and then whether faults exist in the power grid is judged according to a measurement result. Therefore, the waveform precision of the power distribution terminal can influence the fault judgment result of the power grid, and further the operation safety of the power grid can be influenced. Before the power distribution terminal is used for measuring the power grid, a detection device is needed to detect whether the waveform precision of the power distribution terminal meets the requirement.

In the prior art, the voltage value and the current value acquired by the detection device are generally directly compared with the difference value between the voltage value and the current value acquired by the power distribution terminal, so as to determine the waveform precision of the power distribution terminal. The comparison mode is simple, and considered factors are single, so that the waveform precision of the power distribution terminal cannot be comprehensively and accurately determined.

In view of the above technical problems, no effective solution has been proposed at present.

Disclosure of Invention

The specification provides a waveform precision detection method and device for a power distribution terminal, which can comprehensively and accurately determine the waveform precision of the power distribution terminal.

An object of an embodiment of the present disclosure is to provide a waveform accuracy detection method of a power distribution terminal, including:

Acquiring voltage data and current data; wherein the voltage data includes: voltage data corresponding to the three-phase channels of the power distribution terminal and voltage data corresponding to the three-phase channels of the detection equipment; the current data includes: current data corresponding to the three-phase channels of the power distribution terminal and current data corresponding to the three-phase channels of the detection equipment; the detection equipment is used for detecting the waveform precision of the power distribution terminal;

determining a voltage detection result of the power distribution terminal according to the voltage data; wherein the voltage detection result includes: applying a steady-state voltage error detection result, a voltage harmonic content error detection result, a voltage recording error detection result and a voltage time scale error detection result;

determining a current detection result of the power distribution terminal according to the current data; wherein the current detection result includes: applying a steady-state current error detection result and a current harmonic content error detection result;

determining a target detection result of the power distribution terminal according to the voltage detection result of the power distribution terminal and the current detection result of the power distribution terminal;

and under the condition that the target detection result is passing, determining that the waveform precision of the power distribution terminal meets the requirement.

Further, in another embodiment of the method, the determining, according to the voltage data, a voltage detection result of the power distribution terminal includes:

determining a voltage effective value and a voltage harmonic component according to the voltage data; wherein the voltage effective value includes: the voltage effective value corresponding to the three-phase channel of the power distribution terminal and the voltage effective value corresponding to the three-phase channel of the detection equipment; the voltage harmonic component includes: voltage harmonic components corresponding to the three-phase channels of the power distribution terminal and voltage harmonic components corresponding to the three-phase channels of the detection equipment;

determining a voltage wave recording error of the power distribution terminal and a voltage time scale error of the power distribution terminal according to the voltage data;

determining an applied steady-state voltage error of the power distribution terminal according to the voltage effective value;

determining a voltage harmonic content error of the power distribution terminal according to the voltage effective value and the voltage harmonic component;

and determining a voltage detection result of the power distribution terminal according to the voltage wave recording error of the power distribution terminal, the voltage time scale error of the power distribution terminal, the steady-state voltage application error of the power distribution terminal and the voltage harmonic content error of the power distribution terminal.

Further, in another embodiment of the method, the determining, according to the current data, a current detection result of the power distribution terminal includes:

determining a current effective value and a current harmonic component according to the current data; wherein the current effective value includes: the current effective value corresponding to the three-phase channel of the power distribution terminal and the current effective value corresponding to the three-phase channel of the detection equipment; the current harmonic component includes: the power distribution terminal comprises a current harmonic component corresponding to a three-phase channel of the power distribution terminal and a current harmonic component corresponding to a three-phase channel of the detection equipment;

determining an applied steady-state current error of the power distribution terminal according to the current effective value;

determining a current harmonic content error of the power distribution terminal according to the current effective value and the current harmonic component;

and determining a current detection result of the power distribution terminal according to the applied steady-state current error of the power distribution terminal and the current harmonic content error of the power distribution terminal.

Further, in another embodiment of the method, the determining, according to the voltage data, a voltage recording error of the power distribution terminal and a voltage time scale error of the power distribution terminal includes:

Screening out first voltage data meeting requirements from voltage data corresponding to a three-phase channel of the power distribution terminal; determining a sampling sequence number corresponding to the first voltage data;

screening out second voltage data meeting the requirements from voltage data corresponding to the three-phase channel of the detection equipment; determining a sampling sequence number corresponding to the second voltage data;

determining a voltage wave recording error of a power distribution terminal according to the first voltage data and the second voltage data;

and determining a voltage time scale error of the power distribution terminal according to the sampling sequence number corresponding to the first voltage data and the sampling sequence number corresponding to the second voltage data.

Further, in another embodiment of the method, the determining the voltage harmonic content error of the power distribution terminal according to the voltage effective value and the voltage harmonic component includes:

determining the voltage harmonic content of the power distribution terminal according to the voltage effective value corresponding to the three-phase channel of the power distribution terminal and the voltage harmonic component corresponding to the three-phase channel of the power distribution terminal;

determining the voltage harmonic content of the detection equipment according to the voltage effective value corresponding to the three-phase channel of the detection equipment and the voltage harmonic component corresponding to the three-phase channel of the detection equipment;

And calculating the difference between the voltage harmonic content of the power distribution terminal and the voltage harmonic content of the detection equipment as the voltage harmonic content error of the power distribution terminal.

Further, in another embodiment of the method, the determining the voltage detection result of the power distribution terminal according to the voltage recording error of the power distribution terminal, the voltage time scale error of the power distribution terminal, the applied steady-state voltage error of the power distribution terminal, and the voltage harmonic content error of the power distribution terminal includes:

comparing the voltage wave recording error of the power distribution terminal with a first threshold value, and determining a first result;

comparing the voltage time scale error of the power distribution terminal with a second threshold value, and determining a second result;

comparing the applied steady-state voltage error of the power distribution terminal with a third threshold value, and determining a third result;

comparing the voltage harmonic content error of the power distribution terminal with a fourth threshold value, and determining a fourth result;

and determining a voltage detection result of the power distribution terminal according to the first result, the second result, the third result and the fourth result.

Further, in another embodiment of the method, the determining the current harmonic content error of the power distribution terminal according to the current effective value and the current harmonic component includes:

Determining the current harmonic content of the power distribution terminal according to the current effective value corresponding to the three-phase channel of the power distribution terminal and the current harmonic component corresponding to the three-phase channel of the power distribution terminal;

determining the current harmonic content of the detection equipment according to the current effective value corresponding to the three-phase channel of the detection equipment and the current harmonic component corresponding to the three-phase channel of the detection equipment;

and calculating the difference value between the current harmonic content of the power distribution terminal and the current harmonic content of the detection equipment as the current harmonic content error of the power distribution terminal.

Further, in another embodiment of the method, the determining a current detection result of the power distribution terminal according to the applied steady state current error of the power distribution terminal and the current harmonic content error of the power distribution terminal includes:

comparing the applied steady-state current error of the power distribution terminal with a fifth threshold value, and determining a fifth result;

comparing the current harmonic content error of the power distribution terminal with a sixth threshold value, and determining a sixth result;

and determining a current detection result of the power distribution terminal according to the fifth result and the sixth result.

On the other hand, the embodiment of the specification also provides a waveform precision detection device of a power distribution terminal, which comprises:

The acquisition module is used for acquiring voltage data and current data; wherein the voltage data includes: voltage data corresponding to the three-phase channels of the power distribution terminal and voltage data corresponding to the three-phase channels of the detection equipment; the current data includes: current data corresponding to the three-phase channels of the power distribution terminal and current data corresponding to the three-phase channels of the detection equipment; the detection equipment is used for detecting the waveform precision of the power distribution terminal;

the first calculation module is used for determining a voltage detection result of the power distribution terminal according to the voltage data; wherein the voltage detection result includes: applying a steady-state voltage error detection result, a voltage harmonic content error detection result, a voltage recording error detection result and a voltage time scale error detection result;

the second calculation module is used for determining a current detection result of the power distribution terminal according to the current data; wherein the current detection result includes: applying a steady-state current error detection result and a current harmonic content error detection result;

the third calculation module is used for determining a target detection result of the power distribution terminal according to the voltage detection result of the power distribution terminal and the current detection result of the power distribution terminal;

And the determining module is used for determining that the waveform precision of the power distribution terminal meets the requirement under the condition that the target detection result is passing.

In still another aspect, embodiments of the present disclosure further provide a computer readable storage medium having stored thereon computer instructions that when executed implement the method for detecting waveform accuracy of a power distribution terminal described above.

According to the waveform precision detection method of the power distribution terminal, voltage data and current data are obtained; wherein the voltage data includes: voltage data corresponding to the three-phase channels of the power distribution terminal and voltage data corresponding to the three-phase channels of the detection equipment; the current data includes: current data corresponding to the three-phase channels of the power distribution terminal and current data corresponding to the three-phase channels of the detection equipment; the detection equipment is used for detecting the waveform precision of the power distribution terminal; determining a voltage detection result of the power distribution terminal according to the voltage data; wherein the voltage detection result includes: applying a steady-state voltage error detection result, a voltage harmonic content error detection result, a voltage recording error detection result and a voltage time scale error detection result; determining a current detection result of the power distribution terminal according to the current data; wherein the current detection result includes: applying a steady-state current error detection result and a current harmonic content error detection result; determining a target detection result of the power distribution terminal according to the voltage detection result of the power distribution terminal and the current detection result of the power distribution terminal; and under the condition that the target detection result is passing, determining that the waveform precision of the power distribution terminal meets the requirement.

And, after the voltage data is acquired, determining a voltage detection result of the power distribution terminal in the following manner: determining a voltage effective value and a voltage harmonic component according to the voltage data; wherein the voltage effective value includes: the voltage effective value corresponding to the three-phase channel of the power distribution terminal and the voltage effective value corresponding to the three-phase channel of the detection equipment; the voltage harmonic component includes: voltage harmonic components corresponding to the three-phase channels of the power distribution terminal and voltage harmonic components corresponding to the three-phase channels of the detection equipment; determining a voltage wave recording error of the power distribution terminal and a voltage time scale error of the power distribution terminal according to the voltage data; determining an applied steady-state voltage error of the power distribution terminal according to the voltage effective value; determining a voltage harmonic content error of the power distribution terminal according to the voltage effective value and the voltage harmonic component; and determining a voltage detection result of the power distribution terminal according to the voltage wave recording error of the power distribution terminal, the voltage time scale error of the power distribution terminal, the steady-state voltage application error of the power distribution terminal and the voltage harmonic content error of the power distribution terminal.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure, the drawings that are required for the embodiments will be briefly described below, and the drawings described below are only some embodiments described in the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

Fig. 1 is a schematic flow chart of one embodiment of a method for detecting waveform accuracy of a power distribution terminal provided in the present specification;

FIG. 2 is a schematic diagram of one embodiment of a test system for acquiring voltage data provided herein;

FIG. 3 is a schematic diagram of one embodiment of a test system for acquiring current data provided herein;

FIG. 4 is a schematic diagram of a test system in a specific scenario provided by an embodiment of the present disclosure;

FIG. 5 is an illustration of 0.05U acquisition in a specific scenario provided by the embodiments of the present disclosure _N Schematic waveform diagram of voltage data;

fig. 6 is a schematic structural diagram of an embodiment of a waveform precision detecting apparatus of a power distribution terminal provided in the present specification;

fig. 7 is a schematic structural diagram of a server provided in the present specification.

Detailed Description

In order to make the technical solutions in the present specification better understood by those skilled in the art, the technical solutions in the embodiments of the present specification will be clearly and completely described below with reference to the drawings in the embodiments of the present specification, and it is obvious that the described embodiments are only some embodiments of the present specification, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are intended to be within the scope of the present disclosure.

In consideration of the prior art, it is common to directly compare the voltage and current values acquired by the detection device with the voltage and current values acquired by the power distribution terminal to determine the waveform accuracy of the power distribution terminal. The comparison mode is simple, and considered factors are single, so that the waveform precision of the power distribution terminal cannot be comprehensively and accurately determined.

Aiming at the problems and the specific reasons for generating the problems in the prior method, the application introduces a waveform precision detection method of the power distribution terminal based on various factors so as to accurately detect whether the waveform precision of the power distribution terminal meets the requirements.

Based on the above thought, the present specification proposes a waveform precision detection method for a power distribution terminal. Firstly, acquiring voltage data and current data; wherein the voltage data includes: voltage data corresponding to the three-phase channels of the power distribution terminal and voltage data corresponding to the three-phase channels of the detection equipment; the current data includes: current data corresponding to the three-phase channels of the power distribution terminal and current data corresponding to the three-phase channels of the detection equipment; the detection equipment is used for detecting the waveform precision of the power distribution terminal; then, determining a voltage detection result of the power distribution terminal according to the voltage data; wherein the voltage detection result includes: applying a steady-state voltage error detection result, a voltage harmonic content error detection result, a voltage recording error detection result and a voltage time scale error detection result; determining a current detection result of the power distribution terminal according to the current data; wherein the current detection result includes: applying a steady-state current error detection result and a current harmonic content error detection result; finally, determining a target detection result of the power distribution terminal according to the voltage detection result of the power distribution terminal and the current detection result of the power distribution terminal; and under the condition that the target detection result is passing, determining that the waveform precision of the power distribution terminal meets the requirement.

Referring to fig. 1, an embodiment of the present disclosure provides a method for detecting waveform accuracy of a power distribution terminal. In particular implementations, the method may include the following.

S101: acquiring voltage data and current data; wherein the voltage data includes: voltage data corresponding to the three-phase channels of the power distribution terminal and voltage data corresponding to the three-phase channels of the detection equipment; the current data includes: current data corresponding to the three-phase channels of the power distribution terminal and current data corresponding to the three-phase channels of the detection equipment; the detection equipment is used for detecting the waveform precision of the power distribution terminal.

In a specific example, the power distribution terminal to be detected and the detection device can be connected into the same test system for data acquisition, and the test system further comprises a power distribution terminal tester, wherein the power distribution terminal tester is equivalent to a power supply, and can apply voltage or current with preset specification to the power distribution terminal and the detection device. Referring to fig. 2, when voltage data is acquired, the power distribution terminal is connected with the detection device in parallel, and then is connected with the power distribution terminal tester, so as to ensure that the voltage of the power distribution terminal is consistent with the voltage of the detection device. Referring to fig. 3, when current data is acquired, the power distribution terminal and the detection device are connected in series, and then connected with the power distribution terminal tester, so as to ensure that the current passing through the power distribution terminal is consistent with the current passing through the detection device. Although the voltage of the power distribution terminal is consistent with the voltage of the detection device when the voltage data is acquired, the voltage data acquired by the power distribution terminal and the voltage data acquired by the detection device have small differences. Although the current through the power distribution terminal coincides with the current through the detection device when the current data is acquired, there is a small difference between the current data acquired by the power distribution terminal and the current data acquired by the detection device. By comparing the similarity degree of the data acquired by the power distribution terminal and the data acquired by the detection equipment, the waveform precision of the power distribution terminal can be determined, and the higher the similarity degree is, the higher the waveform precision is.

In some embodiments, the power distribution terminal has three phase channels: and each channel can acquire corresponding voltage data and current data. The detection device also has a three-phase channel: and each channel can acquire corresponding voltage data and current data.

In some embodiments, the vector sum of the collected a-channel current, b-channel current, c-channel current is equal to zero when the power distribution terminal access circuit is detected if the circuit is not faulty. If the circuit has faults, when the power distribution terminal is connected into the circuit for detection, the vector sum of the acquired a-channel current, b-channel current and c-channel current is not equal to zero, and the zero sequence current is considered to exist in the circuit at the moment, so that the zero sequence current can be used as a condition for starting detection of a test system.

In some embodiments, taking the acquisition of voltage data as an example, description is given: taking the zero sequence current exceeding 1.2A as a condition for starting detection; the rated voltage of the distribution terminal is obtained in advance and is recorded as U _N The method comprises the steps of carrying out a first treatment on the surface of the Referring to the mode shown in fig. 2, after the power distribution terminal and the detection device are connected in parallel, the power distribution terminal is connected with the power distribution terminal tester; then, the distribution terminal tester is controlled to apply three-phase 0.05U to the distribution terminal and the detection equipment _N Is 2 seconds, the frequency is 50Hz; applying three phases 0.05U _N After 0.5 seconds, the distribution terminal tester is controlled to apply 1.5A zero sequence current to the distribution terminal and the detection equipment, the frequency is 50Hz, the condition of starting detection is triggered, and the distribution terminal acquires 0.05U within 1.5 seconds _N Voltage data corresponding to the three-phase channel under the condition that the detection device acquires 0.05U within 1.5 seconds _N Stopping the detection of the voltage data corresponding to the three-phase channel under the condition; repeating the steps, and sequentially controlling the distribution terminal tester to apply three-phase 0.1U to the distribution terminal and the detection equipment _N Voltage of 2 seconds, 0.5U _N 2 seconds, 1.0U _N Is 2 seconds, 1.5U _N The voltage of the power distribution terminal is 2 seconds, and the three-phase channels are respectively acquired to be 0.1U _N Under the condition of 0.5U _N Under the condition of 1.0U _N Under the condition of 1.5U _N Voltage data under conditions; the detection devices respectively acquire that the three-phase channels are 0.1U _N Under the condition of 0.5U _N Under the condition of 1.0U _N Under the condition of 1.5U _N Voltage data under conditions.

In some embodiments, taking the current data as an example, description is given: taking the zero sequence current exceeding 1.2A as a condition for starting detection; the rated current of the power distribution terminal is obtained in advance and is marked as I _N The method comprises the steps of carrying out a first treatment on the surface of the Referring to the mode shown in fig. 3, the power distribution terminal, the detection device and the power distribution terminal tester are connected in series; then, the distribution terminal tester is controlled to apply three-phase 0.1I to the distribution terminal and the detection equipment _N Is 2 seconds, the frequency is 50Hz; applying three phases 0.1I _N Is (1) the current of the (a)After 0.5 seconds, the distribution terminal tester is controlled to apply 1.5A zero sequence current to the distribution terminal and the detection equipment, the frequency is 50Hz, the condition of starting detection is triggered, and the distribution terminal acquires 0.1I within 1.5 seconds _N Under the condition that the current data corresponding to the three-phase channel is detected, the detection device acquires 0.1I within 1.5 seconds _N Current data corresponding to the three-phase channel under the condition, stopping the detection; repeating the steps, and sequentially controlling the distribution terminal tester to apply three-phase 0.2I to the distribution terminal and the detection equipment _N 2 seconds, 0.5I _N 2 seconds, 1.0I _N 2 seconds, 5.0I _N 2 seconds, 10.0I _N The current of the power distribution terminal is 2 seconds, and the three-phase channels are respectively acquired at 0.2I _N Under the condition of 0.5I _N Under the condition of 1.0I _N Under the condition of 5.0I _N Under the condition of 10.0I _N Current data under conditions; the detection devices respectively acquire that the three-phase channels are in 0.2I _N Under the condition of 0.5I _N Under the condition of 1.0I _N Under the condition of 5.0I _N Under the condition of 10.0I _N Current data under conditions.

In some embodiments, the voltage data corresponding to the three-phase channel of the power distribution terminal is a discrete data set formed by a plurality of equally spaced voltage sampling points, and the power distribution terminal also records sampling serial numbers, also called time marks, of the plurality of voltage sampling points. For example, in 0.1U _N For example, if 0.1U is used for the a-channel voltage data under the condition _N The number of the a-channel voltage data under the condition is 1000, the sampling sequence number is interval [1,1000 ]]And each sampling point corresponds to a sampling sequence number. Similarly, current data is a discrete data set consisting of a plurality of equally spaced current sample points.

In some embodiments, the generated voltage data, current data are in the data format of comtrde 1999 and are saved as cfg, dat formatted files.

S102: determining a voltage detection result of the power distribution terminal according to the voltage data; wherein the voltage detection result includes: and applying a steady-state voltage error detection result, a voltage harmonic content error detection result, a voltage recording error detection result and a voltage time scale error detection result.

In some embodiments, determining a voltage detection result of the power distribution terminal according to the voltage data includes, when implemented:

S1021: determining a voltage effective value and a voltage harmonic component according to the voltage data; wherein the voltage effective value includes: the voltage effective value corresponding to the three-phase channel of the power distribution terminal and the voltage effective value corresponding to the three-phase channel of the detection equipment; the voltage harmonic component includes: voltage harmonic components corresponding to the three-phase channels of the power distribution terminal and voltage harmonic components corresponding to the three-phase channels of the detection equipment;

s1022: determining a voltage wave recording error of the power distribution terminal and a voltage time scale error of the power distribution terminal according to the voltage data;

s1023: determining an applied steady-state voltage error of the power distribution terminal according to the voltage effective value;

s1023: determining a voltage harmonic content error of the power distribution terminal according to the voltage effective value and the voltage harmonic component;

s1025: and determining a voltage detection result of the power distribution terminal according to the voltage wave recording error of the power distribution terminal, the voltage time scale error of the power distribution terminal, the steady-state voltage application error of the power distribution terminal and the voltage harmonic content error of the power distribution terminal.

In some embodiments, the effective voltage values corresponding to the three-phase channels of the power distribution terminal may be determined according to the following equation:

The corner mark d represents a power distribution terminal, the corner mark i represents the type of a channel (i can take the values of a, b and c), the corner mark q1 represents different voltage conditions, and q1 can take the values of: 0.05U _N 、0.1U _N 、0.5U _N 、1.0U _N 、1.5U _N U represents voltage, RMS (U) _{q1_d_i} Representing a power distribution terminal under q1 conditionVoltage effective value corresponding to i channel of (2), N _{q1_d_i} Representing the total number of voltage data (i.e. voltage sampling points) corresponding to the i channel of the power distribution terminal under the q1 condition, U _{q1_d_i_n} And (3) representing the nth voltage data corresponding to the i channel of the power distribution terminal under the q1 condition, wherein n represents the sampling sequence number of the sampling point.

In some embodiments, the effective voltage value corresponding to the three-phase channel of the detection device may be determined according to the following equation:

wherein, the corner mark m represents the detection equipment, RMS (U) _{q1_m_i} Representing the effective value of the voltage corresponding to the i channel of the detection device under the q1 condition, N _{q1_m_i} Representing the total number of voltage data (i.e. voltage sampling points) corresponding to the i channel of the detection device under q1 condition, U _{q1_m_i_n} Represents the nth voltage data corresponding to the i channel of the detection device under the q1 condition.

In some embodiments, the voltage harmonic components corresponding to the three phase channels of the power distribution terminal may be determined as follows:

wherein k represents harmonic frequency, and k can be 3, 5, 7, 9, 11, 13, T (U) _{k_q1_d_i} Represents the harmonic component of k times voltage corresponding to the i channel of the power distribution terminal under the q1 condition, j represents the imaginary unit, and j satisfies j ² = -1, n represents the sampling sequence number of the sampling point.

In some embodiments, k=3, 5, 7, 9, 11, 13 are substituted into equation 3 in sequence, so that k-th harmonic voltage components corresponding to the three-phase channels of the power distribution terminal under different q1 conditions can be obtained.

In some embodiments, the voltage harmonic components corresponding to the three phase channels of the detection device may be determined as follows:

wherein k represents harmonic frequency, and k can be 3, 5, 7, 9, 11, 13, T (U) _{k_q1_m_i} Representing the k-th harmonic component of the voltage corresponding to the i-channel of the detection device under q1 condition.

In some embodiments, k=3, 5, 7, 9, 11, 13 are substituted into equation 4 in sequence, so that k-th harmonic voltage components corresponding to the three-phase channels of the detection device under different q1 conditions can be obtained.

In some embodiments, determining a voltage recording error of the power distribution terminal and a voltage time scale error of the power distribution terminal according to the voltage data, when the method is implemented, includes:

s10221: screening out first voltage data meeting requirements from voltage data corresponding to a three-phase channel of the power distribution terminal; determining a sampling sequence number corresponding to the first voltage data;

S10222: screening out second voltage data meeting the requirements from voltage data corresponding to the three-phase channel of the detection equipment; determining a sampling sequence number corresponding to the second voltage data;

s10223: determining a voltage wave recording error of a power distribution terminal according to the first voltage data and the second voltage data;

s10224: and determining a voltage time scale error of the power distribution terminal according to the sampling sequence number corresponding to the first voltage data and the sampling sequence number corresponding to the second voltage data.

In some embodiments, the specification identifies 1.0U _N The voltage recording error of the i channel (i can take the value a or b or c) of the distribution terminal and the voltage time scale error of the distribution terminal are illustrated by examples under the condition, and the method comprises the following steps:

s1: from 1.0U _N Under the condition, the maximum value, the minimum value, the next-maximum value and the next-minimum value corresponding to the channel i are screened out from the voltage data corresponding to the three-phase channel of the power distribution terminal and used as first voltage data; determining a sampling sequence number corresponding to the first voltage data;

s2: from 1.0U _N Screening out the maximum value, the minimum value, the next-maximum value and the next-minimum value corresponding to the channel i from the voltage data corresponding to the three-phase channel of the detection equipment under the condition as second voltage data; determining a sampling sequence number corresponding to the second voltage data;

S3: according to the following formula, 1.0U is determined according to the first voltage data and the second voltage data _N Under the condition, the voltage of the i channel of the distribution terminal records the wave error:

wherein M is _{d_i} Voltage recording error, MAX, of i channel of power distribution terminal _{d_i} Maximum value of voltage data, MAX, representing power distribution terminal channel i _{m_i} Representing the maximum value of the voltage data of the channel i of the detection device;

s4: subtracting the sampling sequence number corresponding to the maximum value of the i channel of the power distribution terminal from the sampling sequence number corresponding to the maximum value of the i channel of the detection equipment, and taking the absolute value of the subtraction result as a first voltage time scale error;

s5: subtracting the sampling sequence number corresponding to the i channel sub-maximum value of the power distribution terminal from the sampling sequence number corresponding to the i channel sub-maximum value of the detection equipment, and taking the absolute value of the subtraction result as a second voltage time scale error;

s6: subtracting the sampling sequence number corresponding to the minimum value of the i channel of the power distribution terminal from the sampling sequence number corresponding to the minimum value of the i channel of the detection equipment, and taking the absolute value of the subtraction result as a third voltage time scale error;

s7: subtracting the sampling sequence number corresponding to the i channel suborder value of the power distribution terminal from the sampling sequence number corresponding to the suborder value of the i channel of the detection equipment, and taking the absolute value of the subtraction result as a fourth voltage time scale error;

S8: summarizing the first voltage time scale error, the second voltage time scale error, the third voltage time scale error and the fourth voltage time scale error to obtain the voltage time scale error of the i channel of the power distribution terminal; the voltage timing error may be indicative of the accuracy of the power distribution terminal in time.

In some embodiments, the steps of the foregoing embodiments may be further referred to obtain a voltage timing error and a voltage recording error of the power distribution terminal under different voltage conditions.

In some embodiments, determining the applied steady-state voltage error of the power distribution terminal according to the voltage effective value includes, when implemented:

the applied steady state voltage error of the power distribution terminal is determined according to the following formula:

wherein W (U) _{q1_a} Representing the steady state voltage error applied to the a-channel under q1 condition, W (U) _{q1_b} Representing the steady state voltage error applied by the b channel under q1 condition, W (U) _{q1_c} Representing the steady state voltage error applied by the c-channel under q1 condition, W (U) _q1 Representing the applied steady state voltage error of the power distribution terminal at q 1.

From the above equation 1, equation 2, and equation 6, q1=0.05u can be calculated, respectively _N 、0.1U _N 、0.5U _N 、1.0U _N 、1.5U _N The steady state voltage error is applied at different power distribution terminals.

In some embodiments, determining the voltage harmonic content error of the power distribution terminal according to the voltage effective value and the voltage harmonic component includes:

S10241: determining the voltage harmonic content of the power distribution terminal according to the voltage effective value corresponding to the three-phase channel of the power distribution terminal and the voltage harmonic component corresponding to the three-phase channel of the power distribution terminal;

s10242: determining the voltage harmonic content of the detection equipment according to the voltage effective value corresponding to the three-phase channel of the detection equipment and the voltage harmonic component corresponding to the three-phase channel of the detection equipment;

s10243: and calculating the difference between the voltage harmonic content of the power distribution terminal and the voltage harmonic content of the detection equipment as the voltage harmonic content error of the power distribution terminal.

In some embodiments, it is only necessary to operate according to q1=1.0u _N The fourth result is determined by the voltage harmonic content error of the power distribution terminal, and q1=1.0u can be determined by referring to the following way _N Voltage harmonic content error of the power distribution terminal:

s1: confirm that q1=1.0u _N Voltage effective value of power distribution terminalAnd the voltage effective value of the detection device +.>

S2: q1=1.0u is calculated according to the following equation _N Voltage harmonic content of the time distribution terminal:

wherein THD (U) _{d_i} Representing the voltage harmonic content of the i channel (i values a, b and c) of the power distribution terminal;

s3: q1=1.0u is calculated according to the following equation _N Detecting voltage harmonic content of equipment:

wherein THD (U) _{m_i} Representing the voltage harmonic content of the channel (i values a, b and c) of the detection device i;

s4: and calculating the voltage harmonic content error of the power distribution terminal according to the following formula:

THD(U) _{E_i} ＝THD(U) _{d_i} -THD(U) _{m_i} (9)

wherein THD (U) _{E_i} Representing the voltage harmonic content error of the i channel of the power distribution terminal.

By the above embodiment, it is possible to calculate the values at q1=1.0u, respectively _N Corresponding three-phase channels of time distribution terminals a, b and cVoltage harmonic content error.

In some embodiments, determining the voltage detection result of the power distribution terminal according to the voltage wave recording error of the power distribution terminal, the voltage time scale error of the power distribution terminal, the applied steady-state voltage error of the power distribution terminal and the voltage harmonic content error of the power distribution terminal specifically includes:

s10251: comparing the voltage wave recording error of the power distribution terminal with a first threshold value, and determining a first result;

s10252: comparing the voltage time scale error of the power distribution terminal with a second threshold value, and determining a second result;

s10253: comparing the applied steady-state voltage error of the power distribution terminal with a third threshold value, and determining a third result;

s10254: comparing the voltage harmonic content error of the power distribution terminal with a fourth threshold value, and determining a fourth result;

S10255: and determining a voltage detection result of the power distribution terminal according to the first result, the second result, the third result and the fourth result.

In some embodiments, the first threshold may be set to 0.1. Under the condition that any data in the voltage recording errors (the voltage recording errors specifically comprise a voltage recording error of a channel, a voltage recording error of a channel and a voltage recording error of a channel) of the power distribution terminal is larger than a first threshold value, the first result is unqualified; and under the condition that any data in the voltage wave recording errors of the power distribution terminal is smaller than or equal to a first threshold value, the first result is qualified.

In some embodiments, the second threshold may be set to 800. Under the condition that any data in the voltage time scale errors of the power distribution terminal is larger than the data of the second threshold value, the second result is unqualified; and under the condition that any data in the voltage time scale error of the power distribution terminal is smaller than or equal to a second threshold value, the second result is qualified.

In some embodiments, q1=0.05u _N The corresponding third threshold is 5%; q1=0.1u _N The corresponding third threshold is 2.5%; q1=0.5u _N The corresponding third threshold is 1.0%; q1=1.0U _N The corresponding third threshold is 0.5%; q1=1.5u _N The corresponding third threshold is 1.0%.

In some embodiments, comparing the applied steady-state voltage error under different q1 conditions with a third threshold under the q1 condition, respectively, and if the applied steady-state voltage error is greater than the third threshold under the q1 condition, determining that the third result is not qualified; and if all the applied steady-state voltage errors are smaller than or equal to a third threshold value under the corresponding q1 condition, determining that the third result is qualified.

In some embodiments, the fourth threshold may be set to 5%. Under the condition that any data in the voltage harmonic content errors (the voltage harmonic content errors specifically comprise a voltage harmonic content error of a channel, a voltage harmonic content error of a channel and a voltage harmonic content error of a channel c) of the power distribution terminal is larger than a fourth threshold value, the fourth result is unqualified; and under the condition that any data in the voltage harmonic content errors of the power distribution terminal is smaller than or equal to a fourth threshold value, the fourth result is qualified.

In some embodiments, if the first result, the second result, the third result, and the fourth result are all qualified, determining that the voltage detection result of the power distribution terminal is qualified; if the first result, the second result, the third result and the fourth result are unqualified, the voltage detection result of the power distribution terminal is determined to be unqualified.

S103: determining a current detection result of the power distribution terminal according to the current data; wherein the current detection result includes: and applying a steady-state current error detection result and a current harmonic content error detection result.

In some embodiments, determining a current detection result of the power distribution terminal according to the current data includes, when implemented:

s1031: determining a current effective value and a current harmonic component according to the current data; wherein the current effective value includes: the current effective value corresponding to the three-phase channel of the power distribution terminal and the current effective value corresponding to the three-phase channel of the detection equipment; the current harmonic component includes: the power distribution terminal comprises a current harmonic component corresponding to a three-phase channel of the power distribution terminal and a current harmonic component corresponding to a three-phase channel of the detection equipment;

s1032: determining an applied steady-state current error of the power distribution terminal according to the current effective value;

s1033: determining a current harmonic content error of the power distribution terminal according to the current effective value and the current harmonic component;

s1034: and determining a current detection result of the power distribution terminal according to the applied steady-state current error of the power distribution terminal and the current harmonic content error of the power distribution terminal.

In some embodiments, the effective current value corresponding to the three-phase channel of the power distribution terminal may be determined according to the following formula:

wherein, the corner mark q2 represents different current conditions, and q2 can take the following values: 0.1I _N 、0.2I _N 、0.5I _N 、1.0I _N 、5.0I _N 、10.0I _N I represents the current, RMS (I) _{q2_d_i} Representing the effective current value corresponding to the i channel of the power distribution terminal under the q2 condition, N _{q2_d_i} Representing the total number of current data (i.e., current sampling points) corresponding to the I channel of the power distribution terminal under q2 condition, I _{q2_d_i_n} And (3) representing the nth current data corresponding to the i channel of the power distribution terminal under the q2 condition, wherein n represents the sampling sequence number of the sampling point.

In some embodiments, the effective current value corresponding to the three-phase channel of the detection device may be determined according to the following equation:

wherein, the corner mark m represents the detection equipment, RMS (I) _{q2_m_i} Representing the effective value of the current corresponding to the i channel of the detection device under the q2 condition, N _{q2_m_i} Representing current data corresponding to the i-channel of the detection device under q2 conditions (i.e. current samplingSample points), I _{q2_m_i_n} Represents the nth current data corresponding to the i channel of the detection device under q2 condition.

In some embodiments, the current harmonic components corresponding to the three phase channels of the power distribution terminal may be determined as follows:

wherein k represents harmonic frequency, and k can be 3, 5, 7, 9, 11, 13, T (I) _{k_q2_d_i} And represents the k-th current harmonic component corresponding to the i channel of the power distribution terminal under the q2 condition.

In some embodiments, the current harmonic components corresponding to the three phase channels of the detection device may be determined as follows:

wherein k represents harmonic frequency, and k can be 3, 5, 7, 9, 11, 13, T (I) _{k_q2_m_i} Representing the harmonic component of the k-th current corresponding to the i-channel of the detection device under q2 condition.

In some embodiments, determining the applied steady state current error of the power distribution terminal according to the current effective value specifically includes:

the applied steady state current error of the power distribution terminal is determined according to the following formula:

wherein W (I) _{q2_a} Representing the steady state current error applied to the a-channel under q2 condition, W (I) _{q2_b} Representing the steady state current error applied by the b channel under q2 condition, W (I) _{q2_c} Representing the steady state voltage error applied by the c-channel under q2 condition, W (I) _q2 Representing the applied steady state voltage error of the power distribution terminal at q 2.

By the above formula10. Equation 11 and equation 14 can calculate q2=0.1i, respectively _N 、0.2I _N 、0.5I _N 、1.0I _N 、5.0I _N 、10.0I _N The steady state current error is applied at different power distribution terminals.

In some embodiments, determining the current harmonic content error of the power distribution terminal according to the current effective value and the current harmonic component includes, when implemented,:

S10331: determining the current harmonic content of the power distribution terminal according to the current effective value corresponding to the three-phase channel of the power distribution terminal and the current harmonic component corresponding to the three-phase channel of the power distribution terminal;

s10332: determining the current harmonic content of the detection equipment according to the current effective value corresponding to the three-phase channel of the detection equipment and the current harmonic component corresponding to the three-phase channel of the detection equipment;

s10333: and calculating the difference value between the current harmonic content of the power distribution terminal and the current harmonic content of the detection equipment as the current harmonic content error of the power distribution terminal.

In some embodiments, it is only necessary to operate according to q2=1.0i _N The current harmonic content error of the power distribution terminal at the time to determine the sixth result can be determined by referring to the following way to determine q2=1.0i _N Voltage harmonic content error of the power distribution terminal:

s1: confirm that q2=1.0i _N Current effective value RMS (I) of power distribution terminal _{1.0IN_d_i} And detecting the current effective value RMS (I) of the device _{1.0IN_m_i} ；

S2: q2=1.0i is calculated according to the following equation _N Current harmonic content of the time distribution terminal:

wherein THD (I) _{d_i} Representing the current harmonic content of the i channel (i values a, b and c) of the power distribution terminal;

s3: q2=1.0i is calculated according to the following equation _N Detecting the current harmonic content of the equipment:

wherein THD (I) _{m_i} Representing the current harmonic content of the i channel (i takes on the values a, b, c) of the detection device.

S4: the current harmonic content error of the power distribution terminal is calculated according to the following formula:

THD(I) _{E_i} ＝THD(I) _{d_i} -THD(I) _{m_i} (17)

wherein THD (I) _{E_i} Indicating the current harmonic content error of the i channel of the power distribution terminal.

By the above embodiment, it is possible to calculate the values of q2=1.0i, respectively _N And the current harmonic content errors corresponding to the three-phase channels of the power distribution terminals a, b and c.

In some embodiments, determining a current detection result of the power distribution terminal according to the applied steady-state current error of the power distribution terminal and the current harmonic content error of the power distribution terminal, when the method is implemented, the method includes:

s10341: comparing the applied steady-state current error of the power distribution terminal with a fifth threshold value, and determining a fifth result;

s10342: comparing the current harmonic content error of the power distribution terminal with a sixth threshold value, and determining a sixth result;

s10343: and determining a current detection result of the power distribution terminal according to the fifth result and the sixth result.

In some embodiments, q2=0.1I _N The corresponding fifth threshold is 5%; q2=0.2i _N The corresponding fifth threshold is 2.5%; q2=0.5I _N The corresponding fifth threshold is 1.0%; q2=1.0i _N The corresponding fifth threshold is 0.5%; q2=5.0i _N The corresponding fifth threshold is 1.0%, q2=10.0i _N The corresponding fifth threshold is 2.5%.

In some embodiments, comparing the applied steady state current error under different q2 conditions with a fifth threshold under the q2 conditions, respectively, and if there is a applied steady state current error greater than the fifth threshold under the q2 conditions, determining that the fifth result is unacceptable; and if all the applied steady-state current errors are smaller than or equal to a fifth threshold value under the corresponding q2 condition, determining that the fifth result is qualified.

In some embodiments, the sixth threshold may be set to 5%. When any data of the current harmonic content errors (the current harmonic content errors specifically comprise a current harmonic content error of a channel, a current harmonic content error of a channel and a current harmonic content error of a channel c) of the power distribution terminal is larger than a sixth threshold value, the sixth result is unqualified; and under the condition that any data in the current harmonic content error of the power distribution terminal is smaller than or equal to a sixth threshold value, the sixth result is qualified.

In some embodiments, if the fifth result and the sixth result are both qualified, determining that the current detection result of the power distribution terminal is qualified; and if the fifth result and the sixth result are unqualified, determining that the current detection result of the power distribution terminal is unqualified.

S104: and determining a target detection result of the power distribution terminal according to the voltage detection result of the power distribution terminal and the current detection result of the power distribution terminal.

In some embodiments, if the voltage detection result of the power distribution terminal is qualified and the current detection result of the power distribution terminal is qualified, determining that the target detection result of the power distribution terminal is passing; if the voltage detection result of the power distribution terminal and the current detection result of the power distribution terminal are unqualified, determining that the target detection result of the power distribution terminal is not passing.

S105: and under the condition that the target detection result is passing, determining that the waveform precision of the power distribution terminal meets the requirement.

In some embodiments, a distribution terminal with satisfactory waveform accuracy may be used for fault detection of the power grid.

Through the embodiment, the similarity degree of the data collected by the power distribution terminal and the data collected by the detection equipment can be detected from multiple dimensions of the voltage recording error, the voltage time scale error, the steady-state voltage error, the voltage harmonic content error, the steady-state current error and the current harmonic content error, so that the waveform precision of the power distribution terminal can be accurately determined.

In a specific example of a scenario, referring to fig. 4, fig. 4 shows a schematic diagram of a test system, where the test system includes a power distribution terminal tester, a power distribution terminal, and a recorder, where the recorder is a detection device. The distribution terminal tester is provided with an a channel, a b channel and a c channel. The power distribution terminal has an a-channel, a b-channel, and a c-channel. The recorder has an a-channel, a b-channel, and a c-channel. The power distribution terminal tester a channel, the power distribution terminal a channel and the wave recorder a channel are connected, the power distribution terminal tester b channel, the power distribution terminal b channel and the wave recorder b channel are connected, and the power distribution terminal tester c channel, the power distribution terminal c channel and the wave recorder c channel are connected. When voltage data is acquired, the power distribution terminal and the oscillograph are connected in parallel and then connected with the power distribution terminal tester in series, the voltage value of the channel a of the power distribution terminal tester is equal to the voltage value of the channel a of the power distribution terminal, the voltage value of the channel a of the oscillograph is equal to the voltage value of the channel a of the oscillograph, and the voltage value of the channel a is recorded as U _A The method comprises the steps of carrying out a first treatment on the surface of the The voltage value of the b channel of the power distribution terminal tester is equal to the voltage value of the b channel of the power distribution terminal tester, the voltage value of the b channel is equal to the voltage value of the b channel of the recorder, and the voltage value of the b channel is recorded as U _B The method comprises the steps of carrying out a first treatment on the surface of the The voltage value of the c channel of the power distribution terminal tester is equal to the voltage value of the c channel of the power distribution terminal tester, the voltage value of the c channel is equal to the voltage value of the c channel of the recorder, and the voltage value of the c channel is recorded as U _C . When current data is acquired, the power distribution terminal, the recorder and the power distribution terminal tester are connected in series, the current value of the power distribution terminal tester a channel is equal to the current value of the power distribution terminal a channel and is equal to the current value of the recorder a channel, and the current value of the a channel is recorded as I _A The method comprises the steps of carrying out a first treatment on the surface of the The current value of the b channel of the power distribution terminal tester is equal to the current value of the b channel of the power distribution terminal tester, the current value of the b channel is recorded as I _B The method comprises the steps of carrying out a first treatment on the surface of the The current value of the c channel of the power distribution terminal tester is equal to that of the oscillograph, and the voltage value of the c channel is recorded as I _C 。I _N Indicating rated current of distribution terminal, U _N Indicating the rated voltage of the power distribution terminal.

In a toolIn an example of a volume scenario, see FIG. 5, to obtain 0.05U _N For example, the voltage data under the condition can be used for applying 0.05U more than 2 seconds to a channel (a phase), b channel (b phase) and c channel (c phase) of the power distribution terminal by using a power distribution terminal tester _N And at the beginning of the application of 0.05U _N After 0.5 seconds, a zero sequence current I of 2A is applied ₀ The waveforms collected by the power distribution terminal are shown in fig. 5, and the power distribution terminal records three-phase voltage data within 0.5 to 2 seconds.

Based on the above method for detecting waveform precision of the power distribution terminal, the present disclosure further provides an embodiment of a device for detecting waveform precision of the power distribution terminal, referring to fig. 6, where the device for detecting waveform precision of the power distribution terminal specifically includes the following modules:

an acquisition module 601, configured to acquire voltage data and current data; wherein the voltage data includes: voltage data corresponding to the three-phase channels of the power distribution terminal and voltage data corresponding to the three-phase channels of the detection equipment; the current data includes: current data corresponding to the three-phase channels of the power distribution terminal and current data corresponding to the three-phase channels of the detection equipment; the detection equipment is used for detecting the waveform precision of the power distribution terminal;

the first calculation module 602 is configured to determine a voltage detection result of the power distribution terminal according to the voltage data; wherein the voltage detection result includes: applying a steady-state voltage error detection result, a voltage harmonic content error detection result, a voltage recording error detection result and a voltage time scale error detection result;

A second calculation module 603, configured to determine a current detection result of the power distribution terminal according to the current data; wherein the current detection result includes: applying a steady-state current error detection result and a current harmonic content error detection result;

a third calculation module 604, configured to determine a target detection result of the power distribution terminal according to a voltage detection result of the power distribution terminal and a current detection result of the power distribution terminal;

and the determining module 605 is configured to determine that the waveform precision of the power distribution terminal meets a requirement if the target detection result is passing.

In some embodiments, the first calculating module 602 is specifically configured to determine a voltage effective value and a voltage harmonic component according to the voltage data; wherein the voltage effective value includes: the voltage effective value corresponding to the three-phase channel of the power distribution terminal and the voltage effective value corresponding to the three-phase channel of the detection equipment; the voltage harmonic component includes: voltage harmonic components corresponding to the three-phase channels of the power distribution terminal and voltage harmonic components corresponding to the three-phase channels of the detection equipment; determining a voltage wave recording error of the power distribution terminal and a voltage time scale error of the power distribution terminal according to the voltage data; determining an applied steady-state voltage error of the power distribution terminal according to the voltage effective value; determining a voltage harmonic content error of the power distribution terminal according to the voltage effective value and the voltage harmonic component; and determining a voltage detection result of the power distribution terminal according to the voltage wave recording error of the power distribution terminal, the voltage time scale error of the power distribution terminal, the steady-state voltage application error of the power distribution terminal and the voltage harmonic content error of the power distribution terminal.

In some embodiments, the second calculating module 603 is specifically configured to determine a current effective value and a current harmonic component according to the current data; wherein the current effective value includes: the current effective value corresponding to the three-phase channel of the power distribution terminal and the current effective value corresponding to the three-phase channel of the detection equipment; the current harmonic component includes: the power distribution terminal comprises a current harmonic component corresponding to a three-phase channel of the power distribution terminal and a current harmonic component corresponding to a three-phase channel of the detection equipment; determining an applied steady-state current error of the power distribution terminal according to the current effective value; determining a current harmonic content error of the power distribution terminal according to the current effective value and the current harmonic component; and determining a current detection result of the power distribution terminal according to the applied steady-state current error of the power distribution terminal and the current harmonic content error of the power distribution terminal.

It should be noted that, the units, devices, or modules described in the above embodiments may be implemented by a computer chip or entity, or may be implemented by a product having a certain function. For convenience of description, the above devices are described as being functionally divided into various modules, respectively. Of course, when the present description is implemented, the functions of each module may be implemented in the same piece or pieces of software and/or hardware, or a module that implements the same function may be implemented by a plurality of sub-modules or a combination of sub-units, or the like. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

The embodiments of the present specification also provide a computer storage medium of a waveform precision detection method of a power distribution terminal, the computer storage medium storing computer program instructions that when executed implement: acquiring voltage data and current data; wherein the voltage data includes: voltage data corresponding to the three-phase channels of the power distribution terminal and voltage data corresponding to the three-phase channels of the detection equipment; the current data includes: current data corresponding to the three-phase channels of the power distribution terminal and current data corresponding to the three-phase channels of the detection equipment; the detection equipment is used for detecting the waveform precision of the power distribution terminal; determining a voltage detection result of the power distribution terminal according to the voltage data; wherein the voltage detection result includes: applying a steady-state voltage error detection result, a voltage harmonic content error detection result, a voltage recording error detection result and a voltage time scale error detection result; determining a current detection result of the power distribution terminal according to the current data; wherein the current detection result includes: applying a steady-state current error detection result and a current harmonic content error detection result; determining a target detection result of the power distribution terminal according to the voltage detection result of the power distribution terminal and the current detection result of the power distribution terminal; and under the condition that the target detection result is passing, determining that the waveform precision of the power distribution terminal meets the requirement.

In the present embodiment, the storage medium includes, but is not limited to, a random access Memory (Random Access Memory, RAM), a Read-Only Memory (ROM), a Cache (Cache), a Hard Disk (HDD), or a Memory Card (Memory Card). The memory may be used to store computer program instructions. The network communication unit may be an interface for performing network connection communication, which is set in accordance with a standard prescribed by a communication protocol.

In this embodiment, the functions and effects of the program instructions stored in the computer storage medium may be explained in comparison with other embodiments, and are not described herein.

The present disclosure also provides a server comprising a processor and a memory for storing processor-executable instructions, the processor, when embodied, being operable to perform the following steps according to the instructions: acquiring voltage data and current data; wherein the voltage data includes: voltage data corresponding to the three-phase channels of the power distribution terminal and voltage data corresponding to the three-phase channels of the detection equipment; the current data includes: current data corresponding to the three-phase channels of the power distribution terminal and current data corresponding to the three-phase channels of the detection equipment; the detection equipment is used for detecting the waveform precision of the power distribution terminal; determining a voltage detection result of the power distribution terminal according to the voltage data; wherein the voltage detection result includes: applying a steady-state voltage error detection result, a voltage harmonic content error detection result, a voltage recording error detection result and a voltage time scale error detection result; determining a current detection result of the power distribution terminal according to the current data; wherein the current detection result includes: applying a steady-state current error detection result and a current harmonic content error detection result; determining a target detection result of the power distribution terminal according to the voltage detection result of the power distribution terminal and the current detection result of the power distribution terminal; and under the condition that the target detection result is passing, determining that the waveform precision of the power distribution terminal meets the requirement.

In order to more accurately complete the above instructions, referring to fig. 7, another specific server is provided in this embodiment of the present disclosure, where the server includes a network communication port 701, a processor 702, and a memory 703, and the above structures are connected by an internal cable, so that each structure may perform specific data interaction.

The network communication port 701 may be specifically configured to obtain voltage data and current data; wherein the voltage data includes: voltage data corresponding to the three-phase channels of the power distribution terminal and voltage data corresponding to the three-phase channels of the detection equipment; the current data includes: current data corresponding to the three-phase channels of the power distribution terminal and current data corresponding to the three-phase channels of the detection equipment; the detection equipment is used for detecting the waveform precision of the power distribution terminal.

The processor 702 may be specifically configured to determine a voltage detection result of the power distribution terminal according to the voltage data; wherein the voltage detection result includes: applying a steady-state voltage error detection result, a voltage harmonic content error detection result, a voltage recording error detection result and a voltage time scale error detection result; determining a current detection result of the power distribution terminal according to the current data; wherein the current detection result includes: applying a steady-state current error detection result and a current harmonic content error detection result; determining a target detection result of the power distribution terminal according to the voltage detection result of the power distribution terminal and the current detection result of the power distribution terminal; and under the condition that the target detection result is passing, determining that the waveform precision of the power distribution terminal meets the requirement.

The memory 703 may be used for storing a corresponding program of instructions.

In this embodiment, the network communication port 701 may be a virtual port that binds with different communication protocols, so that different data may be sent or received. For example, the network communication port may be a port responsible for performing web data communication, a port responsible for performing FTP data communication, or a port responsible for performing mail data communication. The network communication port may also be an entity's communication interface or a communication chip. For example, it may be a wireless mobile network communication chip, such as GSM, CDMA, etc.; it may also be a Wifi chip; it may also be a bluetooth chip.

In this embodiment, the processor 702 may be implemented in any suitable manner. For example, the processor may take the form of, for example, a microprocessor or processor, and a computer-readable medium storing computer-readable program code (e.g., software or firmware) executable by the (micro) processor, logic gates, switches, an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a programmable logic controller, and an embedded microcontroller, among others. The description is not intended to be limiting.

In this embodiment, the memory 703 may include a plurality of layers, and in a digital system, the memory may be any memory as long as it can hold binary data; in an integrated circuit, a circuit with a memory function without a physical form is also called a memory, such as a RAM, a FIFO, etc.; in the system, the storage device in physical form is also called a memory, such as a memory bank, a TF card, and the like.

Although the present description provides method operational steps as described in the examples or flowcharts, more or fewer operational steps may be included based on conventional or non-inventive means. The order of steps recited in the embodiments is merely one way of performing the order of steps and does not represent a unique order of execution. When implemented by an apparatus or client product in practice, the methods illustrated in the embodiments or figures may be performed sequentially or in parallel (e.g., in a parallel processor or multi-threaded processing environment, or even in a distributed data processing environment). The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, it is not excluded that additional identical or equivalent elements may be present in a process, method, article, or apparatus that comprises a described element. The terms first, second, etc. are used to denote a name, but not any particular order.

Those skilled in the art will also appreciate that, in addition to implementing the controller in a pure computer readable program code, it is well possible to implement the same functionality by logically programming the method steps such that the controller is in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers, etc. Such a controller can be regarded as a hardware component, and means for implementing various functions included therein can also be regarded as a structure within the hardware component. Or even means for achieving the various functions may be regarded as either software modules implementing the methods or structures within hardware components.

The description may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, classes, etc. that perform particular tasks or implement particular abstract data types. The specification may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.

From the above description of embodiments, it will be apparent to those skilled in the art that the present description may be implemented in software plus a necessary general hardware platform. Based on such understanding, the technical solutions of the present specification may be embodied essentially in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., and include several instructions to cause a computer device (which may be a personal computer, a mobile terminal, a server, or a network device, etc.) to perform the methods described in the various embodiments or portions of the embodiments of the present specification.

Various embodiments in this specification are described in a progressive manner, and identical or similar parts are all provided for each embodiment, each embodiment focusing on differences from other embodiments. The specification is operational with numerous general purpose or special purpose computer system environments or configurations. For example: personal computers, server computers, hand-held or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set top boxes, programmable electronic devices, network PCs, minicomputers, mainframe computers, distributed computing environments that include any of the above systems or devices, and the like.

Although the present specification has been described by way of example, it will be appreciated by those skilled in the art that there are many variations and modifications to the specification without departing from the spirit of the specification, and it is intended that the appended claims encompass such variations and modifications as do not depart from the spirit of the specification.

Claims

1. A method for detecting waveform accuracy of a power distribution terminal, the method comprising:

2. The method of claim 1, wherein determining a voltage detection result of the power distribution terminal from the voltage data comprises:

3. The method of claim 1, wherein determining a current detection result of the power distribution terminal from the current data comprises:

4. The method of claim 2, wherein determining a voltage recording error of the power distribution terminal, a voltage timing error of the power distribution terminal, based on the voltage data, comprises:

5. The method of claim 2, wherein determining a voltage harmonic content error of the power distribution terminal from the voltage effective value, the voltage harmonic component, comprises:

6. The method of claim 2, wherein determining a voltage detection result of a power distribution terminal based on a voltage recording error of the power distribution terminal, a voltage time scale error of the power distribution terminal, an applied steady state voltage error of the power distribution terminal, a voltage harmonic content error of the power distribution terminal, comprises:

7. A method according to claim 3, wherein determining a current harmonic content error of the power distribution terminal from the current effective value, the current harmonic component, comprises:

8. A method according to claim 3, wherein determining the current detection result of the power distribution terminal according to the applied steady state current error of the power distribution terminal and the current harmonic content error of the power distribution terminal comprises:

9. A waveform accuracy detection apparatus for a power distribution terminal, the apparatus comprising:

10. A computer readable storage medium, having stored thereon computer instructions which, when executed by a processor, implement the steps of the method of any of claims 1 to 8.