CN102637288A - Method for analysis of line loss in distribution-room area of power supply enterprise - Google Patents
Method for analysis of line loss in distribution-room area of power supply enterprise Download PDFInfo
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Abstract
本发明涉及一种用于供电企业台区线损分析的方法，根据台区线损情况，首先进行台区基础数据分析，其次进行台区线损统计分析，然后进行供电侧数据分析，再其次进行售电侧数据分析，因此，本发明能够对台区线损的合理率进行统计分析，并对不合理的台区进行异常处理。
The invention relates to a method for analyzing line loss in a power supply enterprise's station area. According to the line loss situation in the station area, firstly analyze the basic data of the station area, then perform statistical analysis on the line loss in the station area, then analyze the data on the power supply side, and then perform The data analysis on the electricity sales side is carried out. Therefore, the present invention can perform statistical analysis on the reasonable rate of line loss in the station area, and perform abnormal processing on the unreasonable station area.
Description
技术领域 technical field
本发明涉及电力领域，特别涉及一种用于供电企业台区线损分析的方法。 The invention relates to the field of electric power, in particular to a method for analyzing line loss in a station area of a power supply enterprise.
背景技术 Background technique
目前，台区线损管理是供电企业线损管理的重点和难点，在管理中没有一种明确有效的方式来对台区线损情况进行分析，往往人为的进行随意的判断，没有确定的方法，得出的结果往往也不合理，容易造成错误判断，无法为反窃电、节能降损工作提供依据。 At present, the line loss management of the station area is the focus and difficulty of the line loss management of the power supply enterprise. In the management, there is no clear and effective way to analyze the line loss situation of the station area. It is often artificially judged arbitrarily, and there is no definite method , the results obtained are often unreasonable, easily lead to wrong judgments, and cannot provide a basis for anti-stealing, energy-saving and loss-reducing work.
发明内容 Contents of the invention
本发明的目的是提供一种新型的线损分析方法，通过，能够有效地进行台区线损分析，并对。 The purpose of the present invention is to provide a new type of line loss analysis method, through which, the line loss analysis of the station area can be carried out effectively, and correct.
为了达到上述目的，本发明的技术方案是提供一种用于供电企业台区线损分析的方法，所述分析方法，包含对线损原因及合理率进行统计分析的以下若干步骤： In order to achieve the above-mentioned purpose, the technical solution of the present invention is to provide a method for analyzing the line loss in the station area of the power supply enterprise. The analysis method includes the following steps of statistically analyzing the cause of the line loss and the reasonable rate:
步骤1、对各个台区进行基础数据分析，即，对低压台区的电系信息和用户信息进行分析汇总； Step 1. Perform basic data analysis on each station area, that is, analyze and summarize the electrical system information and user information of the low-voltage station area;
步骤2、进行台区线损统计，即，根据各个台区的供电侧和售电侧的数据来计算线损率，并且对这些线损率进行统计分析； Step 2. Perform line loss statistics in the station area, that is, calculate the line loss rate according to the data on the power supply side and the electricity sales side of each station area, and perform statistical analysis on these line loss rates;
步骤3、对线损率出现异常的台区，进行供电侧数据的准确性分析； Step 3. For the station area where the line loss rate is abnormal, analyze the accuracy of the data on the power supply side;
步骤4、对线损率出现异常的台区，进行售电侧数据的准确性分析。 Step 4. For the station area where the line loss rate is abnormal, analyze the accuracy of the electricity sales side data.
根据所述方法得到分析结果之后，还进一步包含步骤5，即，根据分析结果，对其中线损异常的台区进行处理，来消除线损率异常的情况。 After the analysis result is obtained according to the method, step 5 is further included, that is, according to the analysis result, the station area in which the line loss is abnormal is processed to eliminate the abnormal line loss rate.
步骤1中进一步包含以下过程：对各台区的电系分析、对台区进行系统间用户信息的比对，和对各台区进行用户分析。 Step 1 further includes the following processes: analyzing the electrical systems of each station area, comparing user information between systems for each station area, and performing user analysis for each station area.
步骤2进一步包含以下过程：获取台区线损统计数据、台区线损率计算、异常台区线损率报警、台区线损率比对，和电系单位线损数据统计。 Step 2 further includes the following processes: obtaining statistical data of line loss in the station area, calculating the line loss rate in the station area, alarming the line loss rate in the abnormal station area, comparing the line loss rate in the station area, and counting the line loss data of the electrical system unit.
步骤3进一步包含以下过程：获取异常台区供电侧数据、供电侧异常数据报警，和供电异常数据修复。 Step 3 further includes the following processes: obtaining data on the power supply side of the abnormal station area, alarming the abnormal data on the power supply side, and repairing the abnormal data on the power supply.
步骤4进一步包含以下过程：获取异常台区售电侧数据，和分析售电侧用电客户情况、售电量中零电量情况、售电量中什项电量情况、售电量中退补电量情况及售电量中抄表质量情况。 Step 4 further includes the following process: obtaining data on the electricity sales side of the abnormal station area, and analyzing the situation of electricity consumers on the electricity sales side, the situation of zero electricity in the electricity sales, the situation of what electricity in the electricity sales, the situation of refunds and supplements in the electricity sales, and the electricity sales The quality of meter reading in China.
步骤5进一步包含以下过程：形成线损可能的原因，并进行内场工作处理、外场工作处理，和线损消缺。 Step 5 further includes the following process: form the possible cause of the line loss, and perform infield work processing, outfield work processing, and line loss elimination.
与现有技术相比，本发明所述用于供电企业台区线损分析的方法，其优点在于：本发明根据台区线损情况，首先进行台区基础数据分析，其次进行台区线损统计分析，然后进行供电侧数据分析，再其次进行售电侧数据分析，因此，本发明能够对台区线损的合理率进行统计分析，并对不合理的台区进行异常处理。 Compared with the prior art, the method of the present invention for analyzing the line loss of a power supply enterprise has the advantages that: the present invention first analyzes the basic data of the station area according to the line loss situation of the station area, and secondly performs the analysis of the line loss of the station area. Statistical analysis, then data analysis on the power supply side, and then data analysis on the electricity sales side. Therefore, the present invention can perform statistical analysis on the reasonable rate of line loss in the station area, and perform abnormal processing on the unreasonable station area.
附图说明 Description of drawings
图1是本发明所述用于供电企业台区线损分析的方法的流程图。 Fig. 1 is a flow chart of the method for line loss analysis in the station area of a power supply enterprise according to the present invention.
具体实施方式 Detailed ways
如图1所示，本发明所述用于供电企业台区线损分析的方法，主要是根据台区线损情况，首先进行台区基础数据分析，其次进行台区线损统计分析，然后进行供电侧数据分析，再其次进行售电侧数据分析，最后进行异常线损处理。 As shown in Figure 1, the method for analyzing the line loss in the station area of the power supply enterprise according to the present invention is mainly based on the line loss situation in the station area, firstly analyze the basic data of the station area, secondly perform the statistical analysis of the line loss in the station area, and then perform Data analysis on the power supply side, followed by data analysis on the electricity sales side, and finally abnormal line loss processing.
具体的，所述分析方法包含以下的若干步骤： Specifically, the analysis method includes the following steps:
步骤1、台区基础数据分析；主要是针对低压台区的电系信息和用户信息等方面的基础信息进行收集、整理和分析，以确保台区基础信息的准确性，将这些进行处理过的准确数据作为台区线损分析的基础数据。该步骤进一步包括：对各台区的电系分析、对台区进行系统间用户信息的比对和对各台区进行用户分析等下列若干步骤。下文将以获取《黄山台区基础数据》为例进行说明。 Step 1. Analysis of the basic data of the station area; it is mainly to collect, organize and analyze the basic information of the electrical system information and user information of the low-voltage station area, so as to ensure the accuracy of the basic information of the station area, and process these Accurate data is used as the basic data for line loss analysis in the station area. This step further includes: analyzing the electrical system of each station area, comparing user information between systems for each station area, and performing user analysis for each station area as follows. The following will take the acquisition of "Basic Data of Huangshan Terrace Area" as an example to illustrate.
步骤1.1、对各台区进行电系分析，并进行汇总；例如，得到《黄山站电系分析表》； Step 1.1, carry out electrical system analysis on each station area, and summarize; for example, get "Huangshan Station Electrical System Analysis Table";
步骤1.1.1、从PMS（输配电生产管理系统）上获取各台区所属的35kV站的电系图；例如，得到《黄山站电系图》； Step 1.1.1. Obtain the electrical system diagram of the 35kV station belonging to each station area from the PMS (power transmission and distribution production management system); for example, obtain the "Huangshan Station Electrical System Diagram";
步骤1.1.2、在PMS上，确定各台区所述10kV线路，并以10kV线路为单位进行电系分析；例如，得到《山1居桥10kV线路电系分析》。 Step 1.1.2. On the PMS, determine the 10kV lines in each station area, and conduct electrical system analysis with the 10kV line as a unit; for example, get "Shan Yiju Bridge 10kV Line Electrical System Analysis".
步骤1.2、以台区为单位，对35kV站下属台区进行PMS和CMS（电力营销系统）的用户信息比对，找出两系统的差异性，并汇总；例如，将得到《黄山站169台区用户信息比对结果汇总表》； Step 1.2. Taking the station area as the unit, compare the user information of PMS and CMS (power marketing system) in the station area of the 35kV station, find out the differences between the two systems, and summarize them; for example, you will get "Huangshan Station 169 Stations District user information comparison results summary table";
步骤1.2.1、从CMS中获取35kV站下属台区的所有用户信息，形成汇总表格，例如是《黄山用户cms》； Step 1.2.1. Obtain all user information of the 35kV station subordinate station area from the CMS to form a summary table, such as "Huangshan User cms";
步骤1.2.2、从PMS中获取35kV站下属台区的所有用户信息，形成汇总表格，例如是《黄山整个用户(pms)》； Step 1.2.2, obtain all user information of the subordinate station area of the 35kV station from the PMS, and form a summary form, such as "Huangshan Entire User (pms)";
步骤1.2.3、以PMS为基准，在PMS中查找，缺失户号的用户信息，例如得到《PMS中缺失用户》； Step 1.2.3, based on PMS, search in PMS, user information missing account number, for example, get "Missing User in PMS";
步骤1.2.4、在CMS中查找户号重复的用户信息，并分析户号重复的原因，形成详细列表；例如，是《CMS中重复用户》； Step 1.2.4. Find the user information with duplicate account numbers in the CMS, and analyze the reasons for the duplicate account numbers to form a detailed list; for example, "Duplicate Users in CMS";
步骤1.2.5、在PMS中查找户号重复的用户信息，并分析户号重复的原因，形成详细列表。例如，是《PMS中重复用户》。 Step 1.2.5. Search the PMS for user information with duplicate account numbers, analyze the reasons for duplicate account numbers, and form a detailed list. For example, "Repeat Users in PMS".
步骤1.3、对各台区进行用户分析各台区用户分析汇总，例如，得到《黄山站用户分析表》； Step 1.3, carry out user analysis on each station area, analyze and summarize the users in each station area, for example, obtain the "Huangshan Station User Analysis Table";
步骤1.3.1、从CMS中确定各台区对应的统册号，并汇总到《黄山站用户分析表》； Step 1.3.1. Determine the corresponding registration number of each station area from the CMS, and summarize it into the "Huangshan Station User Analysis Table";
步骤1.3.2、从CMS中，通过查找各台区的统册号，确定与统册号相对应的抄表例日，并汇总到《黄山站用户分析表》； Step 1.3.2. From the CMS, by searching the registration number of each station area, determine the meter reading routine day corresponding to the registration number, and summarize it into the "Huangshan Station User Analysis Table";
步骤1.3.3、从CMS中，确定各台区所包含的客户类型和客户数量，并进行分类汇总；例如，汇总到《黄山站用户分析表》。 Step 1.3.3. From the CMS, determine the type and number of customers included in each station area, and perform classification and summary; for example, summarize into the "Huangshan Station User Analysis Table".
步骤2、台区线损统计分析；主要是获取台区供电侧和售电侧的数据计算线损率，并且对于这些线损率进行统计分析。进一步包括：获取台区线损统计数据、台区线损率计算、异常台区线损率报警、台区线损率比对和电系单位线损数据统计等若干步骤。 Step 2. Statistical analysis of line loss in the station area; mainly to obtain the data of the power supply side and the electricity sales side of the station area to calculate the line loss rate, and perform statistical analysis on these line loss rates. It further includes several steps such as obtaining statistical data of line loss in the station area, calculating the line loss rate in the station area, alarming the line loss rate in the abnormal station area, comparing the line loss rate in the station area, and counting the line loss data of the electrical system unit.
步骤2.1、从各个业务平台获取台区线损的统计数据，包括： Step 2.1. Obtain the statistical data of line loss in the station area from each business platform, including:
步骤2.1.1、获取台区售电侧电量分量数据，即，从CMS获取月售电量分量数据； Step 2.1.1. Obtain the power component data of the power sales side in the station area, that is, obtain the monthly power component data from the CMS;
步骤2.1.2、计算台区售电侧电量数据，即，按照CMS提供月售电量分量数据，计算出台区的售电量总和数据； Step 2.1.2. Calculating the electricity sales data of the station area, that is, according to the monthly electricity sales component data provided by the CMS, the total electricity sales data of the station area is calculated;
步骤2.1.3、获取台区售电量计算的时间节点，即，从CMS获取月售电量计算的开始时间和结束时间； Step 2.1.3. Obtain the time node of electricity sales calculation in the station area, that is, obtain the start time and end time of monthly electricity sales calculation from CMS;
步骤2.1.4、获取台区供电侧分量数据，即，从负荷监控平台按照售电侧电量计算的时间节点来获取供电侧的供电分量数据； Step 2.1.4, obtain the component data of the power supply side of the station area, that is, obtain the power supply component data of the power supply side from the time node of the load monitoring platform according to the power calculation of the electricity sales side;
步骤2.1.5、计算台区供电侧电量数据，即，按照负荷监控平台提供月供电量分量数据，计算出台区的供电量总和数据。 Step 2.1.5. Calculating the power supply data of the station area, that is, calculating the total power supply data of the station area according to the monthly power supply component data provided by the load monitoring platform.
步骤2.2、台区线损率计算；即，根据供电量和售电量数据计算出各个台区的线损率； Step 2.2, calculating the line loss rate of each station area; that is, calculating the line loss rate of each station area according to the data of power supply and electricity sales;
步骤2.3、异常台区线损率报警，从而对于台区线损率异常的情况进行标识。 Step 2.3, alarming the line loss rate of the abnormal station area, so as to identify the abnormal situation of the line loss rate of the station area.
步骤2.4、台区线损比对，包括对台区的线损率数据进行横向和纵向的比较； Step 2.4, line loss comparison in the station area, including horizontal and vertical comparison of the line loss rate data in the station area;
步骤2.4.1、台区历史线损数据对比，即，对一个台区，按月、年等时间单位进行纵向的线损率对比； Step 2.4.1. Comparison of historical line loss data in the station area, that is, for a station area, compare the longitudinal line loss rate by month, year and other time units;
步骤2.4.2、各台区线损数据对比，即，对同一个时间单位内，各个台区的线损率进行对比。 Step 2.4.2, compare the line loss data of each station area, that is, compare the line loss rate of each station area within the same time unit.
步骤2.5、电系单位线损数据统计，即以台区上级的10kV线路、35kV变电站为单位进行线损数据统计。 Step 2.5, line loss data statistics of electrical system units, that is, line loss data statistics are carried out in units of 10kV lines and 35kV substations in the station area.
步骤3 供电侧数据分析；主要是指针对线损率出现异常的台区，进行供电侧数据的分析，分析是否是由于供电侧数据的异常导致了线损率的异常。进一步包括：获取异常台区供电侧数据、供电侧异常数据报警和供电异常数据修复等步骤。 Step 3 Power supply side data analysis: mainly refers to the analysis of power supply side data for the station area where the line loss rate is abnormal, and analyzes whether the abnormal line loss rate is caused by the abnormality of the power supply side data. It further includes the steps of acquiring power supply side data of abnormal station area, alarming power supply side abnormal data and repairing power supply abnormal data.
步骤3.1、获取线损异常台区供电侧数据，即，以台区为单位按照任意时间段在负荷监控平台上获取供电侧数据。 Step 3.1. Obtain the power supply side data of the station area with abnormal line loss, that is, obtain the power supply side data on the load monitoring platform at any time period in units of station area.
步骤3.2、供电侧异常数据报警，即，对于台区的异常供电量数据进行标识； Step 3.2, alarming abnormal data on the power supply side, that is, marking the abnormal power supply data in the station area;
步骤3.2.1、突变数据报警，即，对于大于历史平均数据N倍的供电侧数据进行标识； Step 3.2.1, mutation data alarm, that is, to identify the data on the power supply side that is N times larger than the historical average data;
步骤3.2.2、连续0电量报警，即，对于连续时间点的0电量数据进行标识。 Step 3.2.2, continuous zero power alarm, that is, mark the zero power data at consecutive time points.
步骤3.3、供电量异常数据修复，即，对于异常的供电量数据进行技术修复； Step 3.3, restoration of abnormal power supply data, that is, technical repair of abnormal power supply data;
步骤3.3.1、突变数据修复，即，对于突变数据以前后两点平均值来替代修复； Step 3.3.1, repairing the mutation data, that is, replacing the repair with the average value of two points before and after the mutation data;
步骤3.3.2、连续0电量修复，即，对于连续0电量以随后积累的大量值的各点平均值来代替修复。 Step 3.3.2, continuous zero power recovery, that is, for continuous zero power, the average value of each point of a large number of values accumulated subsequently is used to replace the repair.
步骤4 售电侧数据分析；主要是指针对线损率出现异常的台区，进行售电侧数据的分析，分析是否是由于售电侧数据的异常导致了线损率的异常。进一步包括：获取异常台区售电侧数据、售电侧用电客户情况、售电量中零电量情况、售电量中什项电量情况、售电量中退补电量情况和售电量中抄表质量情况等若干步骤。 Step 4 Data analysis on the electricity sales side: mainly refers to the analysis of the data on the electricity sales side for the station area where the line loss rate is abnormal, and analyzes whether the abnormality in the line loss rate is caused by the abnormality in the electricity sales side data. It further includes: obtaining data on the electricity sales side in abnormal stations, customer information on the electricity sales side, zero electricity in electricity sales, specific electricity in electricity sales, refunds and supplements in electricity sales, and meter reading quality in electricity sales, etc. several steps.
步骤4.1、获取异常线损台区售电侧数据，即，以台区为单位按照任意时间段在负荷监控平台上获取供电侧数据。 Step 4.1. Obtain the data on the power sales side of the abnormal line loss station area, that is, obtain the data on the power supply side on the load monitoring platform at any time period in units of the station area.
步骤4.2、售电量中包含的用电客户情况，即，对于异常台区售电量中包含的用电客户情况进行分析； Step 4.2, the electricity customers included in the electricity sales, that is, analyze the electricity customers included in the electricity sales in the abnormal station area;
步骤4.2.1、售电侧用电客户数量比对，分析是否存在应该出账而未出账 Step 4.2.1, compare the number of electricity customers on the electricity sales side, and analyze whether there are accounts that should be paid but have not been paid
的遗漏用户。 of missing users.
步骤4.2.2、台区出账客户类型分析，即对台区出账的客户类型进行分析； Step 4.2.2, analysis of the type of account-out customers in the Taiwan area, that is, analyze the types of customers in the account-out area in the Taiwan area;
步骤4.2.3、台区出账客户类型用电量分析，即，分析台区各类客户所对应的用电量情况。 Step 4.2.3, analysis of power consumption by customer type in the station area, that is, analyzing the electricity consumption corresponding to various customers in the station area.
步骤4.3、售电量中包含的零电量情况，即，分析异常台区存在的零电量情况； Step 4.3, the zero electricity situation included in the electricity sales, that is, analyze the zero electricity situation existing in the abnormal station area;
步骤4.3.1、零电量汇总情况，即对于异常台区存在的零电量情况进行汇总分析； Step 4.3.1, zero electricity summary situation, that is, to conduct a summary analysis of the zero electricity situation existing in the abnormal station area;
步骤4.3.2、零电量明细情况，即，对于异常台区存在的零电量情况进行分量分析。 Step 4.3.2, detailed situation of zero electricity, that is, carry out component analysis for the zero electricity situation existing in the abnormal station area.
步骤4.4、售电量中包含的什项电量情况，即，分析异常台区存在的什项电量情况； Step 4.4, what items of electricity included in the electricity sales, that is, analyze what items of electricity exist in the abnormal station area;
步骤4.4.1、什项电量汇总情况，即，对于异常台区存在的什项电量情况进行汇总分析； Step 4.4.1, the summary of the electric quantity, that is, the summary analysis of the electric quantity existing in the abnormal station area;
步骤4.4.2、什项电量明细情况，即，对于异常台区存在的什项电量情况进行分量分析。 Step 4.4.2, the details of the electric quantity, that is, the component analysis of the electric quantity existing in the abnormal station area.
步骤4.5、售电量中包含的退补电量情况，即，分析异常台区存在的退补电量情况； Step 4.5, the situation of refunded and compensated electricity included in the electricity sales, that is, analyze the situation of refunded and compensated electricity in abnormal station areas;
步骤4.5.1、退补电量汇总情况，即，对于异常台区存在的退补电量情况进行汇总分析； Step 4.5.1, the summary of the refunded and compensated electricity, that is, the summary analysis of the refunded and compensated electricity in the abnormal station area;
步骤4.5.2、退补电量明细情况，即，对于异常台区存在的退补电量情况进行分量分析。 Step 4.5.2, the details of the refunded electricity, that is, the component analysis of the refunded electricity in the abnormal station area.
步骤4.6、售电量的抄表质量情况，即，分析售电侧的抄表质量情况； Step 4.6, the meter reading quality of electricity sales, that is, analyze the quality of meter reading at the electricity sales side;
步骤4.6.1、微机抄收率情况，手抄机、集抄等自动化设备抄手率情况分析； Step 4.6.1, analysis of the rate of copying by microcomputer, and the rate of copying by automatic equipment such as hand copying machines and centralized copying;
步骤4.6.2、抄表及时率与抄表例日相比的抄表及时率。 Step 4.6.2, the timely rate of meter reading compared with the rate of meter reading on a regular day.
步骤5、异常线损处理；主要指针对线损率异常的台区进行了数据分析工作后，形成导致线损率异常的可能的原因，安排相关人员进行针对性的工作，消除线损率异常的情况。进一步包括：形成线损可能的原因、内场工作处理、外场工作处理和线损消缺等若干步骤。 Step 5. Abnormal line loss processing; mainly refers to the possible causes of the abnormal line loss rate after the data analysis of the station area with abnormal line loss rate, and arranges relevant personnel to carry out targeted work to eliminate the abnormal line loss rate Case. It further includes several steps such as possible causes of line loss, infield work processing, outfield work processing, and line loss elimination.
步骤5.1、形成线损可能原因，即，根据供电侧和售电侧的电量分析结果，人工形成可能的对于造成线损的初步原因。 Step 5.1, forming possible causes of line loss, that is, artificially forming possible preliminary causes of line loss according to the power analysis results of the power supply side and the electricity sales side.
步骤5.2、内外场工作处理，即，针对线损原因进行的内外场处理过程； Step 5.2, internal and external field work processing, that is, the internal and external field processing process for the cause of line loss;
步骤5.2.1、内外场工作处理安排，即，针对线损原因进行的内外场处理工作计划安排； Step 5.2.1, Arrangement of internal and external field work processing, that is, the internal and external field processing work plan for the cause of line loss;
步骤5.2.2、内外场工作处理反馈，即，针对线损原因进行的内外场工作处理结果反馈； Step 5.2.2, Feedback of the internal and external field work processing, that is, the feedback of the internal and external field work processing results for the cause of line loss;
步骤5.2.3、内外场工作处理结果分析，即，针对线损原因进行的内外场工作处理结果进行分析。 Step 5.2.3, analysis of the processing results of the internal and external fields, that is, analyzing the processing results of the internal and external fields for the cause of the line loss.
步骤5.3、线损消缺，即，针对内外场工作处理的结果，对于线损进行消缺。 Step 5.3, Line Loss Elimination, that is, line loss is eliminated based on the results of the internal and external field work processing.
至此，本发明所述供电企业台区线损管理及分析的流程结束。通过这一方法能够对台区线损的合理率进行统计分析，并对不合理的台区进行异常处理。 So far, the process of line loss management and analysis in the power supply enterprise station area of the present invention ends. Through this method, the reasonable rate of line loss in the station area can be statistically analyzed, and the abnormal processing of the unreasonable station area can be carried out.
尽管本发明的内容已经通过上述优选实施例作了详细介绍，但应当认识到上述的描述不应被认为是对本发明的限制。在本领域技术人员阅读了上述内容后，对于本发明的多种修改和替代都将是显而易见的。因此，本发明的保护范围应由所附的权利要求来限定。 Although the content of the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as limiting the present invention. Various modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the above disclosure. Therefore, the protection scope of the present invention should be defined by the appended claims.
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