阅读说明：本技术 一种基于变电站电能量采集终端的多回路供电需量叠加方法 (Multi-loop power supply demand superposition method based on electric energy acquisition terminal of transformer substation ) 是由 葛玉磊 宋丙钊 郑亚岗 钟文凯 侯鲁亭 王涛 韩凯 于 2021-08-24 设计创作，主要内容包括：本发明公开了一种基于变电站电能量采集终端的多回路供电需量叠加方法,其技术方案包括以下步骤：S1：由采集主站下发或通过终端屏幕设置叠加参数；S2：采集主站每天对终端进行对时,终端每天对电能表进行对时；S3：采集终端每隔一段时间采集上一时间段叠加组内各电能表1分钟需量负荷记录,同时对采集到的需量数据进行统计计算；S4：当时间过日时,根据上一日的采集及统计计算情况计算生成上日叠加日最大需量,结算日过零点计算生成上一结算日叠加月最大需量。本发明解决了多回路供电网络中无法获取用户最大需量数据的问题,从而实现对多回路供电用户的最大需量指标考核,相比其他方法具有低成本,实用性强的特点,具有很强的推广意义。(The invention discloses a multi-loop power supply demand superposition method based on a substation electric energy acquisition terminal, which comprises the following steps of: s1: the acquisition master station issues or sets superposition parameters through a terminal screen; s2: the terminal is subjected to time synchronization every day by the acquisition master station, and the terminal is subjected to time synchronization every day by the electric energy meter; s3: the method comprises the steps that an acquisition terminal acquires 1-minute demand load records of each electric energy meter in a previous time period superposition group at intervals, and meanwhile, statistical calculation is carried out on acquired demand data; s4: when the time passes the day, calculating and generating the maximum demand of the superposition day of the previous day according to the acquisition and statistical calculation condition of the previous day, and calculating and generating the maximum demand of the superposition month of the previous calculation day by settling the zero crossing point of the day. The method solves the problem that the maximum demand data of the users cannot be acquired in the multi-loop power supply network, thereby realizing the maximum demand index assessment of the multi-loop power supply users.)

1. A multi-loop power supply demand superposition method based on a substation electric energy acquisition terminal is characterized in that the substation electric energy acquisition terminal reads demand load records of each loop electric energy meter at 1 minute time intervals, and superposition daily maximum demand and superposition monthly maximum demand are formed in the terminal through time dimension superposition calculation, and the method comprises the following steps:

s1: the collection master station issues or sets superposition parameters including superposition measuring point numbers, electric energy meter addresses to be superposed and variable ratio parameters of PT and CT of each measuring point through a terminal screen;

s2: the method comprises the steps that a collection master station clocks a terminal every day, the terminal clocks an electric energy meter every day, if the clock error between the terminal and the electric energy meter is within 5 minutes, the terminal calibrates the electric energy meter, and if the clock error is outside 5 minutes, the terminal generates an alarm and reports the alarm to the master station;

s3: the method comprises the steps that an acquisition terminal acquires 1-minute demand load records of each electric energy meter in a previous time period superposition group at intervals, and meanwhile, statistical calculation is carried out on acquired demand data;

s4: when the time passes the day, calculating and generating the maximum demand of the superposition day of the previous day according to the acquisition and statistical calculation condition of the previous day, and calculating and generating the maximum demand of the superposition month of the previous calculation day by settling the zero crossing point of the day.

2. The method for overlapping the demand of the multi-loop power supply based on the electric energy acquisition terminal of the substation according to claim 1, wherein in the step S2, the electric energy meters in the overlapping group are time-calibrated by the acquisition terminal every day to ensure that the time of each electric energy meter is on the same time reference, so as to ensure the accuracy of data.

3. The multi-loop power supply demand superposition method based on the substation electric energy acquisition terminal according to claim 1, wherein in the step S3, the substation electric energy acquisition terminal acquires a 1-minute demand load record of the electric energy meter as a data source.

4. The multi-loop power supply demand superposition method based on the substation electric energy acquisition terminal according to claim 1, wherein in the step S3, the current superposition demand is obtained by calculating the 1-minute load records of each electric energy meter in the acquired superposition group in the same time dimension, and the current superposition demand is compared with the current superposition maximum demand to obtain the latest current superposition maximum demand.

Technical Field

The invention relates to the technical field of substation electric energy acquisition, in particular to a multi-loop power supply demand superposition method based on a substation electric energy acquisition terminal.

Background

With the development of society, people have higher and higher requirements on power supply reliability, so that multi-loop power supply networks are more common. The maximum demand of the assessment user is also a key point in the power grid charging, however, the maximum demand of each loop of electric energy meter cannot be directly calculated in the multi-loop power supply network. The individual imported electric energy meters can be communicated and connected among the electric energy meters in each loop, demand data of other electric energy meters are obtained through communication of one meter to calculate, extra communication lines are needed to be arranged among the electric energy meters in each loop, cost is increased, construction is not facilitated, and in addition, due to special application, collection terminals need to be developed additionally to enable collection. Domestic electric energy meters which are most used in China do not support the application scenario.

Disclosure of Invention

The invention provides a multi-loop power supply demand superposition method based on a substation electric energy acquisition terminal, aiming at the defects of the prior art, the substation electric energy acquisition terminal acquires the demand load record of each loop electric energy meter and carries out statistical calculation to obtain the maximum demand data of a multi-loop power supply network, thereby solving the problem that the maximum demand data of a user cannot be obtained in the multi-loop power supply network.

The purpose of the invention can be realized by the following technical scheme:

a multi-loop power supply demand superposition method based on a substation electric energy acquisition terminal is characterized in that the substation electric energy acquisition terminal reads demand load records of each loop electric energy meter at 1 minute time intervals, and superposition daily maximum demand and superposition monthly maximum demand are formed in the terminal through time dimension superposition calculation, and the method comprises the following steps:

s1: the collection master station issues or sets superposition parameters including superposition measuring point numbers, electric energy meter addresses to be superposed and variable ratio parameters of PT and CT of each measuring point through a terminal screen;

s2: the method comprises the steps that a collection master station clocks a terminal every day, the terminal clocks an electric energy meter every day, if the clock error between the terminal and the electric energy meter is within 5 minutes, the terminal calibrates the electric energy meter, and if the clock error is outside 5 minutes, the terminal generates an alarm and reports the alarm to the master station;

s3: the method comprises the steps that an acquisition terminal acquires 1-minute demand load records of each electric energy meter in a previous time period superposition group at intervals, and meanwhile, statistical calculation is carried out on acquired demand data;

s4: when the time passes the day, calculating and generating the maximum demand of the superposition day of the previous day according to the acquisition and statistical calculation condition of the previous day, and calculating and generating the maximum demand of the superposition month of the previous calculation day by settling the zero crossing point of the day.

Further, the purpose of step S2 is to ensure that the electric energy meters in the superimposed group are on the same time reference, so as to ensure the accuracy of collecting the calculated superimposed demand.

Further, in step S3, the demand values of the electric energy meters in the superimposed group at the same time (accurate to the minute) need to be calculated, and the calculation method of the demand of the superimposed loop is as follows:

meter 1 demand PT1 × CT1+ meter 2 demand PT2 × CT2+ meter 3 demand PT3 × CT3+ … ….

Further, the calculation method of the maximum demand of the overlay loop in step S3 is as follows:

if the demand of the superposition loop is more than or equal to the maximum demand of the current superposition loop, updating the maximum demand value of the current superposition loop into the demand of the superposition loop, and updating the occurrence time of the maximum demand into the current time;

and if the demand of the superposition loop is less than the maximum demand of the current superposition loop, the maximum demand of the current superposition loop is not updated.

Further, in step S4, the counted current maximum demand of the overlay loop is stored in the maximum demand of the overlay loop at the previous day.

Further, in step S4, when the time passes through the zero point of the settlement day, the counted maximum demand of the current superposition loop is stored in the maximum demand of the superposition loop on the last calculation day, and the current maximum demand of the superposition loop is cleared, and the maximum demand counting of the next period is started.

The invention has the beneficial technical effects that: the method has the advantages that the demand load records of the electric energy meters of each loop at the time interval of 1 minute are read through the electric energy acquisition terminal of the transformer substation, the maximum demand of the superposed day and the maximum demand of the superposed month are formed in the terminal through time dimension superposition calculation, and the problem that the maximum demand data of a user cannot be obtained in a multi-loop power supply network is solved, so that the maximum demand index of a multi-loop power supply user is examined, the stable operation of the power grid is guaranteed, and compared with other methods, the method has the characteristics of low cost and strong practicability, and has strong popularization significance.

Drawings

FIG. 1 is a general flow diagram of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.

A multi-loop power supply demand superposition method based on a substation electric energy acquisition terminal comprises the following steps:

s1: the collection master station issues or sets superposition parameters including superposition measuring point numbers, electric energy meter addresses to be superposed and variable ratio parameters of PT and CT of each measuring point through a terminal screen;

s2: the terminal carries out time synchronization on the terminal every day, the terminal carries out time synchronization on the electric energy meter every day, if the clock error between the terminal and the electric energy meter is within 5 minutes, the terminal carries out time calibration on the electric energy meter, and if the clock error is outside 5 minutes, the terminal generates an alarm and reports the alarm to the master station. The purpose of this step is to guarantee that each electric energy meter in the superposition group is on the same time reference, so that the accuracy of the collected and calculated superposition demand can be ensured. (ii) a

S3: the collection terminal collects 1 minute demand load records of each electric energy meter in the previous time period superposition group at intervals, and meanwhile, the collected demand data are subjected to statistical calculation. For example, the collection terminal collects 1-minute demand load records of each electric energy meter in the superposition group every 1 hour, and calculates the demand value of each electric energy meter in the superposition group at the same time (accurate to the minute), wherein the calculation mode of the demand of the superposition loop is as follows:

electricity meter 1 demand PT1 × CT1+ electricity meter 2 demand PT2 × CT2+ electricity meter 3 demand PT3 × CT3+ … …

The calculation method of the maximum demand of the superposition loop comprises the following steps:

if the demand of the superposition loop is more than or equal to the maximum demand of the current superposition loop, updating the maximum demand value of the current superposition loop into the demand of the superposition loop, and updating the occurrence time of the maximum demand into the current time; if the demand of the superposition loop is less than the maximum demand of the current superposition loop, the maximum demand of the current superposition loop is not updated;

s4: when the time passes the day, calculating and generating the maximum demand of the superposition day of the previous day according to the acquisition and statistical calculation condition of the previous day, and calculating and generating the maximum demand of the superposition month of the previous calculation day by settling the zero crossing point of the day. And storing the counted maximum demand of the current superposition loop into the maximum demand of the superposition loop in the previous day when the time passes the day, storing the counted maximum demand of the current superposition loop into the maximum demand of the superposition loop in the previous calculation day when the time passes the zero point of the settlement day, resetting the maximum demand of the current superposition loop, and starting the maximum demand counting of the next period.

The above-mentioned embodiments are illustrative of the specific embodiments of the present invention, and are not restrictive, and those skilled in the relevant art can make various changes and modifications to obtain corresponding equivalent technical solutions without departing from the spirit and scope of the present invention, so that all equivalent technical solutions should be included in the scope of the present invention.