CN103364630B - Load Correction Method of Asynchronous Acquisition of Sub-item Electricity Consumption - Google Patents
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Abstract
Description
技术领域technical field
本发明涉及电力技术，特别是涉及一种分项用电非同步采集负荷修正方法的技术。The invention relates to electric power technology, in particular to a technology of a load correction method for sub-item electricity consumption asynchronously collected.
背景技术Background technique
电力系统中都配备有用于监测电力用户用电状况的能耗监测系统，电力企业可以通过能耗监测系统监测电力用户的电力分项能耗，能耗监测系统通过分类和分项能耗的计量装置，采用远程传输等手段及时采集能耗数据，实现重点建筑能耗的在线监测和动态分析。电力分项能耗是根据建筑能耗的主要用途进行划分的，电力分项能耗是采集和整理后的能耗数据，如空调用电、动力用电、照明用电、特殊用电等。The power system is equipped with an energy consumption monitoring system for monitoring the electricity consumption status of power users. Power companies can monitor power users’ sub-item energy consumption through the energy consumption monitoring system. The energy consumption monitoring system can measure energy consumption by classification and sub-item The device uses remote transmission and other means to collect energy consumption data in a timely manner to realize online monitoring and dynamic analysis of energy consumption in key buildings. The sub-item energy consumption of electricity is divided according to the main uses of building energy consumption. The sub-item energy consumption of electricity is the energy consumption data after collection and sorting, such as air-conditioning power consumption, power consumption, lighting power consumption, special power consumption, etc.
在能耗监测系统中，需要对每个用电出线进行能耗数据采集，以进行数据校正和数值分析，能耗监测系统采集的数据由一个关口表计量数据、若干用电出线负荷计量数据等值组成。然而在数据校正过程中，由于各种计量装置的数据采集时间并非完全同步，导致同一采集点的采集数据间存在着较大的采集时间误差，此误差有可能给能耗监测分析结果带来较大的偏差，甚至导致节能分析报告的错误，降低节能实施效果，造成较大的能源浪费。In the energy consumption monitoring system, it is necessary to collect energy consumption data for each power outlet for data correction and numerical analysis. The data collected by the energy consumption monitoring system consists of a gateway meter measurement data, several power outlet load measurement data, etc. value composition. However, in the process of data correction, due to the fact that the data collection time of various metering devices is not completely synchronized, there is a large collection time error between the data collected at the same collection point. Large deviations may even lead to errors in energy-saving analysis reports, reduce the effect of energy-saving implementation, and cause large energy waste.
发明内容Contents of the invention
针对上述现有技术中存在的缺陷，本发明所要解决的技术问题是提供一种能减小非同步采集数据的采集时间误差，提高能耗监测分析结果准确度的分项用电非同步采集负荷修正方法。In view of the defects existing in the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a sub-item power consumption asynchronous acquisition load that can reduce the acquisition time error of asynchronous acquisition data and improve the accuracy of energy consumption monitoring and analysis results. Correction method.
为了解决上述技术问题，本发明所提供的一种分项用电非同步采集负荷修正方法，涉及能耗监测系统，其特征在于，具体步骤如下：In order to solve the above technical problems, the present invention provides a load correction method for asynchronous collection of sub-item power consumption, which relates to an energy consumption monitoring system, and is characterized in that the specific steps are as follows:
1）获取能耗监测系统的用电出线负荷集合及用电负荷数据，并将获取的用电负荷数据分为两类，一类为关口表数据，另一类为用电出线负荷数据；1) Obtain the electricity outlet load collection and electricity load data of the energy consumption monitoring system, and divide the acquired electricity load data into two categories, one is the gateway table data, and the other is the electricity outlet load data;
其中，关口表数据为低压变压器的低压侧计量值，用电出线负荷数据为低压用电出线计量值，关口表数据的测量类型包括有功功率、无功功率、三相电流、电压、功率因数，用电出线负荷数据的测量类型包括有功功率、无功功率、三相电流；Among them, the data of the gate meter is the measurement value of the low-voltage side of the low-voltage transformer, and the data of the power outlet load is the measurement value of the low-voltage power outlet. The measurement types of the data of the gateway meter include active power, reactive power, three-phase current, voltage, and power factor. The measurement types of power outlet load data include active power, reactive power, and three-phase current;
2）计算电流差值、有功功率差值，具体计算公式为：2) Calculate the current difference and active power difference, the specific calculation formula is:
式中，Fcur为电流差值，Fact为有功功率差值，N为用电出线负荷集合中的出线负荷总数，g(i)为用电出线负荷集合中第i个出线负荷的电流统计函数；In the formula, Fcur is the current difference, Fact is the active power difference, N is the total number of outgoing loads in the set of outgoing loads, and g(i) is the current statistical function of the i-th outgoing load in the set of outgoing loads;
式中，Pgia为关口表数据中的A相电流测量值，Pgib为关口表数据中的B相电流测量值，Pgic为关口表数据中的C相电流测量值；In the formula, Pgia is the A-phase current measurement value in the gate table data, Pgib is the B-phase current measurement value in the gate table data, and Pgic is the C-phase current measurement value in the gate table data;
式中，Pla[i]为用电出线负荷集合中第i个出线负荷的有功功率，Pga为关口表数据中的有功功率测量值；In the formula, Pla[i] is the active power of the i-th outgoing load in the set of electric outgoing loads, and Pga is the measured value of active power in the data of the gateway table;
式中，“&&”表示“并且”，“||”表示“或者”，ε为预先设定的常数，ε的取值小于0.00001；In the formula, "&&" means "and", "||" means "or", ε is a preset constant, and the value of ε is less than 0.00001;
式中，Plia[i]为用电出线负荷集合中第i个出线负荷的A相电流，Plib[i]为用电出线负荷集合中第i个出线负荷的B相电流，Plic[i]为用电出线负荷集合中第i个出线负荷的C相电流；In the formula, Plia[i] is the A-phase current of the i-th outgoing load in the set of electric outgoing loads, Plib[i] is the B-phase current of the i-th outgoing load in the set of electric outgoing loads, and Plic[i] is C-phase current of the i-th outgoing load in the set of electric outgoing loads;
3）计算修正因子，具体计算公式为：3) Calculate the correction factor, the specific calculation formula is:
Φ=Fact/(1.732×Fcur×Pgv)Φ=Fact/(1.732×Fcur×Pgv)
其中，Φ为修正因子，Pgv为关口表数据中的电压测量值；Among them, Φ is the correction factor, and Pgv is the voltage measurement value in the gate table data;
4）对用电出线负荷集合中各个出线负荷的三相电流，按以下三种情况修正：4) For the three-phase current of each outlet load in the electricity outlet load set, it is corrected according to the following three situations:
情况1：如果存在Pla[i]>ε，则对用电出线负荷集合中第i个出线负荷的三相电流值不做修正；Case 1: If there is Pla[i]>ε, the three-phase current value of the i-th outgoing load in the power outgoing load set will not be corrected;
情况2：如果存在Pla[i]≤ε&&(Plib[i]≤ε&&Plic[i]≤ε)，则对用电出线负荷集合中第i个出线负荷的三相电流值进行修正，将其A相电流值、B相电流值、C相电流值全部修正为Φ×Plia[i]；Case 2: If there is Pla[i]≤ε&&(Plib[i]≤ε&&Plic[i]≤ε), then correct the three-phase current value of the i-th outgoing load in the power outgoing load set, and set its A-phase The current value, B-phase current value, and C-phase current value are all corrected to Φ×Plia[i];
情况3：如果存在Pla[i]≤ε&&(Plib[i]＞ε||Plic[i]＞ε)，则对用电出线负荷集合中第i个出线负荷的三相电流值进行修正，将其A相电流值修正为Φ×Plia[i]，将其B相电流值修正为Φ×Plib[i]，将其C相电流值修正为Φ×Plic[i]；Case 3: If there is Pla[i]≤ε&&(Plib[i]＞ε||Plic[i]＞ε), then the three-phase current value of the i-th outgoing load in the power outgoing load set is corrected, and the Its A-phase current value is corrected to Φ×Plia[i], its B-phase current value is corrected to Φ×Plib[i], and its C-phase current value is corrected to Φ×Plic[i];
其中，“&&”表示“并且”，“||”表示“或者”，ε为预先设定的常数，ε的取值小于0.00001；Among them, "&&" means "and", "||" means "or", ε is a preset constant, and the value of ε is less than 0.00001;
其中，Pla[i]为用电出线负荷集合中第i个出线负荷的有功功率，Plia[i]为用电出线负荷集合中第i个出线负荷的A相电流，Plib[i]为用电出线负荷集合中第i个出线负荷的B相电流，Plic[i]为用电出线负荷集合中第i个出线负荷的C相电流；Among them, Pla[i] is the active power of the i-th outgoing load in the power outgoing load set, Plia[i] is the A-phase current of the i-th outgoing load in the electric outgoing load set, and Plib[i] is the power consumption Phase B current of the i-th outgoing load in the outgoing load set, Plic[i] is the C-phase current of the i-th outgoing load in the outgoing load set;
5）对用电出线负荷集合中各个出线负荷的有功功率、无功功率，按以下两种情况修正：5) For the active power and reactive power of each outlet load in the electricity outlet load set, it is corrected according to the following two situations:
情况1：如果存在Pla[i]>ε，则对用电出线负荷集合中第i个出线负荷的有功功率值、无功功率值均不做修正；Case 1: If there is Pla[i]>ε, the active power value and reactive power value of the i-th outgoing load in the set of electric outgoing loads will not be corrected;
情况2：如果存在Pla[i]≤ε，则对用电出线负荷集合中第i个出线负荷的有功功率、无功功率进行修正，将其有功功率值修正为Φ×Pla[i]，将其无功功率值修正为Φ×Plr[i]；Case 2: If there is Pla[i]≤ε, then correct the active power and reactive power of the i-th outgoing load in the set of electric outgoing loads, correct its active power value to Φ×Pla[i], and set Its reactive power value is corrected as Φ×Plr[i];
其中，Pla[i]为用电出线负荷集合中第i个出线负荷的有功功率，Plr[i]为用电出线负荷集合中第i个出线负荷的无功功率，ε为预先设定的常数，ε的取值小于0.00001。Among them, Pla[i] is the active power of the i-th outgoing load in the set of electric outgoing loads, Plr[i] is the reactive power of the i-th outgoing load in the set of electric outgoing loads, and ε is a preset constant , the value of ε is less than 0.00001.
本发明提供的分项用电非同步采集负荷修正方法，对用电出线采集的能耗数据进行分类，不同的采集类型进行相应的处理，然后计算出一个修正因子以修正相应类型数据，能减小非同步采集数据的采集时间误差，提高能耗监测分析结果准确度，且无需增加新的计量数据，具有输入信息少、实现成本低、修正准确度高的特点。The load correction method for sub-item power consumption asynchronous collection provided by the present invention classifies the energy consumption data collected by the power outlets, performs corresponding processing for different collection types, and then calculates a correction factor to correct the corresponding type of data, which can reduce The acquisition time error of asynchronously acquired data is small, the accuracy of energy consumption monitoring and analysis results is improved, and there is no need to add new measurement data. It has the characteristics of less input information, low implementation cost, and high correction accuracy.
附图说明Description of drawings
图1是本发明实施例的分项用电非同步采集负荷修正方法的计算流程图。Fig. 1 is a calculation flow chart of the method for correcting the sub-item power consumption asynchronously collected load according to the embodiment of the present invention.
具体实施方式Detailed ways
以下结合附图说明对本发明的实施例作进一步详细描述，但本实施例并不用于限制本发明，凡是采用本发明的相似结构及其相似变化，均应列入本发明的保护范围。The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings, but the present embodiments are not intended to limit the present invention, and any similar structures and similar changes of the present invention should be included in the protection scope of the present invention.
如图1所示，本发明实施例所提供的一种分项用电非同步采集负荷修正方法，涉及能耗监测系统，其特征在于，具体步骤如下：As shown in Figure 1, a load correction method for asynchronous collection of sub-item power consumption provided by an embodiment of the present invention relates to an energy consumption monitoring system, and is characterized in that the specific steps are as follows:
1）获取能耗监测系统的用电出线负荷集合及用电负荷数据，并将获取的用电负荷数据分为两类，一类为关口表数据，另一类为用电出线负荷数据；1) Obtain the electricity outlet load collection and electricity load data of the energy consumption monitoring system, and divide the acquired electricity load data into two categories, one is the gateway table data, and the other is the electricity outlet load data;
其中，关口表数据为低压变压器的低压侧计量值，用电出线负荷数据为低压用电出线计量值，关口表数据的测量类型包括有功功率、无功功率、三相电流、电压、功率因数，用电出线负荷数据的测量类型包括有功功率、无功功率、三相电流；Among them, the data of the gate meter is the measurement value of the low-voltage side of the low-voltage transformer, and the data of the power outlet load is the measurement value of the low-voltage power outlet. The measurement types of the data of the gateway meter include active power, reactive power, three-phase current, voltage, and power factor. The measurement types of power outlet load data include active power, reactive power, and three-phase current;
2）计算电流差值、有功功率差值，具体计算公式为：2) Calculate the current difference and active power difference, the specific calculation formula is:
式中，Fcur为电流差值，Fact为有功功率差值，N为用电出线负荷集合中的出线负荷总数，g(i)为用电出线负荷集合中第i个出线负荷的电流统计函数；In the formula, Fcur is the current difference, Fact is the active power difference, N is the total number of outgoing loads in the set of outgoing loads, and g(i) is the current statistical function of the i-th outgoing load in the set of outgoing loads;
式中，Pgia为关口表数据中的A相电流测量值，Pgib为关口表数据中的B相电流测量值，Pgic为关口表数据中的C相电流测量值；In the formula, Pgia is the A-phase current measurement value in the gate table data, Pgib is the B-phase current measurement value in the gate table data, and Pgic is the C-phase current measurement value in the gate table data;
式中，Pla[i]为用电出线负荷集合中第i个出线负荷的有功功率，Pga为关口表数据中的有功功率测量值；In the formula, Pla[i] is the active power of the i-th outgoing load in the set of electric outgoing loads, and Pga is the measured value of active power in the data of the gateway table;
式中，“&&”表示“并且”，“||”表示“或者”，ε为预先设定的常数，ε的取值小于0.00001；In the formula, "&&" means "and", "||" means "or", ε is a preset constant, and the value of ε is less than 0.00001;
式中，Plia[i]为用电出线负荷集合中第i个出线负荷的A相电流，Plib[i]为用电出线负荷集合中第i个出线负荷的B相电流，Plic[i]为用电出线负荷集合中第i个出线负荷的C相电流；In the formula, Plia[i] is the A-phase current of the i-th outgoing load in the set of electric outgoing loads, Plib[i] is the B-phase current of the i-th outgoing load in the set of electric outgoing loads, and Plic[i] is C-phase current of the i-th outgoing load in the set of electric outgoing loads;
3）计算修正因子，具体计算公式为：3) Calculate the correction factor, the specific calculation formula is:
Φ=Fact/(1.732×Fcur×Pgv)Φ=Fact/(1.732×Fcur×Pgv)
其中，Φ为修正因子，Pgv为关口表数据中的电压测量值；Among them, Φ is the correction factor, and Pgv is the voltage measurement value in the gate meter data;
4）对用电出线负荷集合中各个出线负荷的三相电流，按以下三种情况修正：4) For the three-phase current of each outlet load in the electricity outlet load set, it is corrected according to the following three situations:
情况1：如果存在Pla[i]>ε，则对用电出线负荷集合中第i个出线负荷的三相电流值不做修正；Case 1: If there is Pla[i]>ε, the three-phase current value of the i-th outgoing load in the power outgoing load set will not be corrected;
情况2：如果存在Pla[i]≤ε&&(Plib[i]≤ε&&Plic[i]≤ε)，则对用电出线负荷集合中第i个出线负荷的三相电流值进行修正，将其A相电流值、B相电流值、C相电流值全部修正为Φ×Plia[i]；Case 2: If there is Pla[i]≤ε&&(Plib[i]≤ε&&Plic[i]≤ε), then correct the three-phase current value of the i-th outgoing load in the power outgoing load set, and set its A-phase The current value, B-phase current value, and C-phase current value are all corrected to Φ×Plia[i];
情况3：如果存在Pla[i]≤ε&&(Plib[i]＞ε||Plic[i]＞ε)，则对用电出线负荷集合中第i个出线负荷的三相电流值进行修正，将其A相电流值修正为Φ×Plia[i]，将其B相电流值修正为Φ×Plib[i]，将其C相电流值修正为Φ×Plic[i]；Case 3: If there is Pla[i]≤ε&&(Plib[i]＞ε||Plic[i]＞ε), then the three-phase current value of the i-th outgoing load in the power outgoing load set is corrected, and the Its A-phase current value is corrected to Φ×Plia[i], its B-phase current value is corrected to Φ×Plib[i], and its C-phase current value is corrected to Φ×Plic[i];
其中，“&&”表示“并且”，“||”表示“或者”，ε为预先设定的常数，ε的取值小于0.00001；Among them, "&&" means "and", "||" means "or", ε is a preset constant, and the value of ε is less than 0.00001;
其中，Pla[i]为用电出线负荷集合中第i个出线负荷的有功功率，Plia[i]为用电出线负荷集合中第i个出线负荷的A相电流，Plib[i]为用电出线负荷集合中第i个出线负荷的B相电流，Plic[i]为用电出线负荷集合中第i个出线负荷的C相电流；Among them, Pla[i] is the active power of the i-th outgoing load in the power outgoing load set, Plia[i] is the A-phase current of the i-th outgoing load in the electric outgoing load set, and Plib[i] is the power consumption Phase B current of the i-th outgoing load in the outgoing load set, Plic[i] is the C-phase current of the i-th outgoing load in the outgoing load set;
5）对用电出线负荷集合中各个出线负荷的有功功率、无功功率，按以下两种情况修正：5) For the active power and reactive power of each outlet load in the electricity outlet load set, it is corrected according to the following two situations:
情况1：如果存在Pla[i]>ε，则对用电出线负荷集合中第i个出线负荷的有功功率值、无功功率值均不做修正；Case 1: If there is Pla[i]>ε, the active power value and reactive power value of the i-th outgoing load in the set of electric outgoing loads will not be corrected;
情况2：如果存在Pla[i]≤ε，则对用电出线负荷集合中第i个出线负荷的有功功率、无功功率进行修正，将其有功功率值修正为Φ×Pla[i]，将其无功功率值修正为Φ×Plr[i]；Case 2: If there is Pla[i]≤ε, then correct the active power and reactive power of the i-th outgoing load in the set of electric outgoing loads, correct its active power value to Φ×Pla[i], and set Its reactive power value is corrected as Φ×Plr[i];
其中，Pla[i]为用电出线负荷集合中第i个出线负荷的有功功率，Plr[i]为用电出线负荷集合中第i个出线负荷的无功功率，ε为预先设定的常数，ε的取值小于0.00001。Among them, Pla[i] is the active power of the i-th outgoing load in the set of electric outgoing loads, Plr[i] is the reactive power of the i-th outgoing load in the set of electric outgoing loads, and ε is a preset constant , the value of ε is less than 0.00001.
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| CN101777765A (en) * | 2010-01-27 | 2010-07-14 | 中国电力科学研究院 | On-line load simulation method of power system |
| CN102509159A (en) * | 2011-11-09 | 2012-06-20 | 中国电力科学研究院 | Electrical-information-acquisition-system-based theoretical line loss estimation method for distribution network |
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| CN1620613A (en) * | 2002-01-09 | 2005-05-25 | 三菱电机株式会社 | Electronic watt-hour meter, error adjusting method, and power calculating circuit |
| CN101777765A (en) * | 2010-01-27 | 2010-07-14 | 中国电力科学研究院 | On-line load simulation method of power system |
| CN102509159A (en) * | 2011-11-09 | 2012-06-20 | 中国电力科学研究院 | Electrical-information-acquisition-system-based theoretical line loss estimation method for distribution network |
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