阅读说明：本技术 针对hplc台区的居民户表电压失准监测方法 (Residential meter voltage misalignment monitoring method for HPLC (high performance liquid chromatography) platform area ) 是由 王绍槐 陈石东 夏文静 王靖茗 骆君 向莎莎 李建军 温业椉 刘睿芳 汤梦园 文 于 2021-07-08 设计创作，主要内容包括：本发明公开了一种针对HPLC台区的居民户表电压失准监测方法,包括获取待监测台区的供电数据；选取台区总表的计算时间点；计算待监测台区的各相的参考电压值；计算待监测台区的各相的电压范围；判定待监测台区下的各居民户表的电压失准状态。本发明提供的这种针对HPLC台区的居民户表电压失准监测方法,采用HPLC通信的台区中HPLC通信的便利收集数据,无需到现场校验,只需分析采集系统后台数据即可判断居民户表电压测量是否失准,易推广,见效快,而且可靠性高、实用性好且简单方便。(The invention discloses a residential meter voltage misalignment monitoring method for an HPLC (high performance liquid chromatography) transformer area, which comprises the steps of obtaining power supply data of the transformer area to be monitored; selecting a calculation time point of a distribution room general table; calculating the reference voltage value of each phase of the transformer area to be monitored; calculating the voltage range of each phase of the transformer area to be monitored; and judging the voltage misalignment state of each resident household meter under the transformer area to be monitored. According to the method for monitoring the voltage misalignment of the residential meter in the HPLC area, data are collected conveniently through HPLC communication in the area of the HPLC communication, field verification is not needed, whether the voltage measurement of the residential meter is misaligned or not can be judged only by analyzing and collecting background data of a system, and the method is easy to popularize, quick in effect, high in reliability, good in practicability, simple and convenient.)

1. A residential meter voltage misalignment monitoring method for an HPLC (high Performance liquid chromatography) platform area comprises the following steps:

s1, acquiring power supply data of a platform area to be monitored;

s2, selecting a calculated time point from the table area summary table current;

s3, calculating reference voltage values of all phases of the transformer area to be monitored;

s4, calculating the voltage range of each phase of the transformer area to be monitored;

and S5, judging the voltage misalignment state of each resident meter in the transformer area to be monitored according to the voltage range obtained in the step S4.

2. The method for monitoring voltage misalignment of residential meters for HPLC districts according to claim 1, wherein the step of selecting the calculation time point of the district summary table in step S2 specifically comprises the following steps:

A. acquiring three-phase current of a station area summary table at 24 integral points in a day;

B. calculating the three-phase current average value and the three-phase unbalance of each integral point according to the three-phase current value obtained in the step A;

C. the weight coefficient S of each integral point is calculated by the following formula_i：

In the formula I_ipIs the ith integer threeAverage value of phase current; i is_minThe minimum value of the three-phase current of the ith integral point is; i is_maxThe maximum value of the three-phase current of the ith integral point is; α and β are weight coefficients, and α + β is 1;

D. selecting the calculation time point of the table area summary table by adopting the following rules:

firstly, removing integral points of which the three-phase current average value is more than 40A;

then, whether an integer point with the three-phase current average value smaller than 20A exists is judged:

if the number of the integer points of which the three-phase current average value is less than 20A is more than or equal to 2, selecting two integer points of which the three-phase current average value is the smallest from the integer points of which the three-phase current average value is less than 20A as the final calculation time points of the distribution room summary table;

if the number of the integer points of which the three-phase current average value is less than 20A is only 1, directly selecting the integer points of which the three-phase current average value is less than 20A; and selecting a weight coefficient S in the remaining integer points_iThe integral point corresponding to the maximum time; selecting two integer points as the final calculation time points of the table area general table;

if no integral point with the three-phase current average value less than 20A exists, the weight coefficient S is directly selected_iTaking two integral points with the largest value as the final calculation time points of the table area general table;

and if two integer points can not be selected as the final calculation time point of the table area general table, directly exiting the method.

3. The method for monitoring voltage misalignment of residential meters for HPLC areas according to claim 2, wherein the step of calculating the reference voltage value of each phase of the area to be monitored in step S3 specifically comprises the following steps:

according to the calculation time point of the distribution area general table selected in the step S2, the reference voltage value of each phase of the distribution area to be monitored is calculated by using the following formula:

wherein z is A, B or C; u shape_zpIs the average voltage of the z phase; u. of_zjThe voltage value of the j-th residential meter of the z-phase at the calculation time point selected in the step S2; max is the maximum value removing operation; min is the minimum value operation.

4. The method according to claim 3, wherein the step S4 of calculating the voltage range of each phase of the distribution area to be monitored comprises the following steps:

calculating the voltage range of each phase of the transformer area to be monitored by adopting the following formula:

U_zU＝U_zp+ZI_aj+X

U_zL＝U_zp-ZI_aj-X

wherein z is A, B or C; u shape_zUThe voltage upper bound of the z phase of the transformer area to be monitored; u shape_zLThe voltage lower bound of the z phase of the transformer area to be monitored; u shape_zpThe z-phase reference voltage value of the station area to be monitored obtained in the step S3; z is the line impedance from the middle section of the line to the household meter; i is_ajThe current value of the z-phase at the calculation time point of the selected table area general table is taken as the table area outlet; and X is the set meter measurement error.

5. The method for monitoring voltage misalignment of residential meters in an HPLC distribution room as recited in claim 4, wherein the voltage misalignment status of each residential meter in the distribution room to be monitored is determined according to the voltage range obtained in step S4 in step S5, specifically by the following steps:

if the voltage of the resident household meter t is within the voltage range of the hanging phase line, the resident household meter t is determined to be normal;

and if the voltage of the resident household meter t is not in the voltage range of the hung phase line, determining that the voltage of the resident household meter t is incorrect.

Technical Field

The invention belongs to the field of electrical automation, and particularly relates to a resident household meter voltage misalignment monitoring method for an HPLC (high performance liquid chromatography) distribution room.

Background

With the development of economic technology and the improvement of living standard of people, electric energy becomes essential secondary energy in production and life of people, and brings endless convenience to production and life of people. Therefore, ensuring stable and reliable supply of electric energy is one of the most important tasks of the power system.

The user's power consumption electric energy measurement is the important function of electric power system. The quantity of the resident household meters is huge, and in the long-term operation process, the performance of part of meter components is reduced or damaged, so that the metering is inaccurate, and the problem of less metering or more metering electric quantity occurs. Most residents have small electricity consumption, the line loss of a transformer area is difficult to embody, the resident household meters do not need to be calibrated periodically, and the hidden trouble exists for a long time. If the electricity is less, the loss is caused to the power supply department; if the amount of electricity is too much, the loss is caused to the user, service complaints are possibly caused, and even large social public opinions are caused. Therefore, a technical means is urgently needed to realize online monitoring of the over-measurement of the household meter.

Metering out-of-tolerance is mainly manifested as out-of-tolerance in voltage or current; for the current, because the meter collects the current of the live wire and the zero line, under the condition of normal power consumption, the current of the live wire and the zero line is the same, and whether the current measurement is out of tolerance or not can be judged by comparing the current of the live wire and the current of the live wire. For the voltage, the meter only samples one path of voltage (three paths of voltage are represented by a three-line meter), and whether the voltage exceeds the threshold value cannot be directly judged without reference comparison.

For monitoring voltage out-of-tolerance, the current methods are as follows: firstly, comparing the voltage of the resident household meter with the voltage of the table area general meter, and if the voltage of the household meter is higher than the voltage of the general meter (the condition of three-phase unbalance is eliminated), indicating that the voltage metering is out of tolerance. However, the method can only roughly analyze the meter with the meter voltage obviously higher than the total meter voltage, and for the meter with small difference, the measured value is still lower than the total meter voltage and cannot be found due to the relation of line voltage drop even if the measured value of the meter voltage exceeds a positive error range. Meanwhile, the meter with the over-error negative error cannot be judged. And secondly, a meter box is provided with a voltage monitoring device, and the voltage of a meter in the same meter box is compared with the voltage of the monitoring device to judge whether the voltage exceeds the tolerance. However, this method requires that the correspondence, phase relationship, etc. between the meter and the meter box are very accurate, which increases additional investment, and at the same time, it is impossible to judge the meter of a single household.

Disclosure of Invention

The invention aims to provide a simple and convenient residential meter voltage misalignment monitoring method for an HPLC (high performance liquid chromatography) transformer area, which has high reliability and good practicability.

The invention provides a residential meter voltage misalignment monitoring method for an HPLC (high performance liquid chromatography) platform area, which comprises the following steps of:

s1, acquiring power supply data of a platform area to be monitored;

s2, selecting a calculation time point from the current data of the table area general table;

s3, calculating reference voltage values of all phases of the transformer area to be monitored;

s4, calculating the voltage range of each phase of the transformer area to be monitored;

and S5, judging the voltage misalignment state of each resident meter in the transformer area to be monitored according to the voltage range obtained in the step S4.

Step S2, selecting a calculation time point from the current data in the table summary table, specifically including the following steps:

A. acquiring three-phase current of a station area summary table at 24 integral points in a day;

B. calculating the three-phase current average value and the three-phase unbalance of each integral point according to the three-phase current value obtained in the step A;

C. the weight coefficient S of each integral point is calculated by the following formula_i：

In the formula I_ipThe three-phase current average value of the ith integral point is obtained; i is_minThe minimum value of the three-phase current of the ith integral point is; i is_maxThe maximum value of the three-phase current of the ith integral point is; α and β are weight coefficients, and α + β is 1;

D. selecting the calculation time point of the table area summary table by adopting the following rules:

firstly, removing integral points of which the three-phase current average value is more than 40A;

then, whether an integer point with the three-phase current average value smaller than 20A exists is judged:

if the number of the integer points of which the three-phase current average value is less than 20A is more than or equal to 2, selecting two integer points of which the three-phase current average value is the smallest from the integer points of which the three-phase current average value is less than 20A as the final calculation time points of the distribution room summary table;

if the number of the integer points of which the three-phase current average value is less than 20A is only 1, directly selecting the integer points of which the three-phase current average value is less than 20A; and selecting a weight coefficient S in the remaining integer points_iThe integral point corresponding to the maximum time; selecting two integer points as the final calculation time points of the table area general table;

if no integral point with the three-phase current average value less than 20A exists, the weight coefficient S is directly selected_iTaking two integral points with the largest value as the final calculation time points of the table area general table;

and if two integer points can not be selected as the final calculation time point of the table area general table, directly exiting the method.

Step S3, where the calculating of the reference voltage value of each phase of the distribution room to be monitored specifically includes the following steps:

according to the calculation time point of the distribution area general table selected in the step S2, the reference voltage value of each phase of the distribution area to be monitored is calculated by using the following formula:

wherein z is A, B or C; u shape_zpIs the average voltage of the z phase; u. of_zjThe voltage value of the j-th residential meter of the z-phase at the calculation time point selected in the step S2; max is the maximum value removing operation; min is the minimum value operation.

Step S4, calculating the voltage range of each phase of the distribution room to be monitored, specifically includes the following steps:

calculating the voltage range of each phase of the transformer area to be monitored by adopting the following formula:

U_zU＝U_zp+ZI_aj+X

U_zL＝U_zp-ZI_aj-X

wherein z is A, B or C; u shape_zUThe voltage upper bound of the z phase of the transformer area to be monitored; u shape_zLFor stand to be monitoredA lower voltage bound for the z-phase of the zone; u shape_zpThe z-phase reference voltage value of the station area to be monitored obtained in the step S3; z is the line impedance from the middle section of the line to the household meter; i is_ajCurrent values for the z-phase at selected calculation time points for the table zone outlet; and X is the set meter measurement error.

In step S5, the voltage misalignment state of each residential meter in the distribution area to be monitored is determined according to the voltage range obtained in step S4, specifically, the following steps are adopted for determination:

if the voltage of the resident household meter t is within the voltage range of the hanging phase line, the resident household meter t is determined to be normal;

and if the voltage of the resident household meter t is not in the voltage range of the hung phase line, determining that the voltage of the resident household meter t is incorrect.

According to the method for monitoring the voltage misalignment of the residential meter in the HPLC area, data are collected conveniently through HPLC communication in the area of the HPLC communication, field verification is not needed, whether the voltage measurement of the residential meter is misaligned or not can be judged only by analyzing and collecting background data of a system, and the method is easy to popularize, quick in effect, high in reliability, good in practicability, simple and convenient.

Drawings

FIG. 1 is a schematic flow chart of the method of the present invention.

Detailed Description

FIG. 1 is a schematic flow chart of the method of the present invention: the invention provides a residential meter voltage misalignment monitoring method for an HPLC (high performance liquid chromatography) platform area, which comprises the following steps of:

s1, acquiring power supply data of a platform area to be monitored;

s2, selecting a calculated time point from the current data of the table area general table; the method specifically comprises the following steps:

A. acquiring three-phase current of a station area summary table at 24 integral points in a day;

B. calculating the three-phase current average value and the three-phase unbalance of each integral point according to the three-phase current value obtained in the step A;

C. the weight coefficient S of each integral point is calculated by the following formula_i：

In the formula I_ipThe three-phase current average value of the ith integral point is obtained; i is_minThe minimum value of the three-phase current of the ith integral point is; i is_maxThe maximum value of the three-phase current of the ith integral point is; α and β are weight coefficients, and α + β is 1;

D. selecting the calculation time point of the table area summary table by adopting the following rules:

firstly, removing integral points of which the three-phase current average value is more than 40A;

then, whether an integer point with the three-phase current average value smaller than 20A exists is judged:

if the number of the integer points of which the three-phase current average value is less than 20A is more than or equal to 2, selecting two integer points of which the three-phase current average value is the smallest from the integer points of which the three-phase current average value is less than 20A as the final calculation time points of the distribution room summary table;

if the number of the integer points of which the three-phase current average value is less than 20A is only 1, directly selecting the integer points of which the three-phase current average value is less than 20A; and selecting a weight coefficient S in the remaining integer points_iThe integral point corresponding to the maximum time; selecting two integer points as the final calculation time points of the table area general table;

if no integral point with the three-phase current average value less than 20A exists, the weight coefficient S is directly selected_iTaking two integral points with the largest value as the final calculation time points of the table area general table;

if two integer points can not be selected as the final calculation time point of the table area general table, directly quitting the method;

s3, calculating reference voltage values of all phases of the transformer area to be monitored; the method specifically comprises the following steps:

according to the calculation time point of the distribution area general table selected in the step S2, the reference voltage value of each phase of the distribution area to be monitored is calculated by using the following formula:

wherein z is A, B or C; u shape_zpIs the average voltage of the z phase; u. of_zjThe voltage value of the j-th residential meter of the z-phase at the calculation time point selected in the step S2; max is the maximum value removing operation; min is the minimum value operation;

in specific implementation, two groups of reference voltage values need to be calculated due to the selection of two calculation time points;

s4, calculating the voltage range of each phase of the transformer area to be monitored; the method specifically comprises the following steps:

calculating the voltage range of each phase of the transformer area to be monitored by adopting the following formula:

U_zU＝U_zp+ZI_aj+X

U_zL＝U_zp-ZI_aj-X

wherein z is A, B or C; u shape_zUThe voltage upper bound of the z phase of the transformer area to be monitored; u shape_zLThe voltage lower bound of the z phase of the transformer area to be monitored; u shape_zpThe z-phase reference voltage value of the station area to be monitored obtained in the step S3; z is the line impedance from the middle section of the line to the household meter; i is_ajCurrent values for the z-phase at selected calculation time points for the table zone outlet; x is a set meter measurement error;

in specific implementation, two calculation time points are selected, and two groups of reference voltage values are obtained through calculation, so that two groups of voltage ranges also need to be obtained through calculation;

s5, judging the voltage misalignment state of each resident meter under the transformer area to be monitored according to the voltage range obtained in the step S4, specifically adopting the following steps to judge:

if the voltage of the resident household meter t is within the voltage range of the hanging phase line, the resident household meter t is determined to be normal;

if the voltage of the resident household meter t is not in the voltage range of the hanging phase line, the voltage of the resident household meter t is determined to be inaccurate;

in specific implementation, two voltage ranges are obtained, so the specific determination may be:

if the voltage of the resident household meter t is within the voltage range of the hanging phase line after the two determinations, the resident household meter t is determined to be normal;

if the voltage of the resident household meter t is judged twice and is not in the voltage range of the hanging phase line, the voltage of the resident household meter t is determined to be inaccurate;

if the voltage of the resident household meter t is judged twice, the voltage of the resident household meter t is judged to be normal once in the voltage range of the hanging phase line and the voltage of the resident household meter t is judged not to be in the voltage range of the hanging phase line for the other time.