CN105487043A - Metering accuracy simulation test system of digital electric energy meter - Google Patents
Metering accuracy simulation test system of digital electric energy meter Download PDFInfo
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Abstract
本发明公开了一种数字式电能表计量准确性仿真测试系统，可以通过同时利用移相器可以调节整个仿真测试系统的功率因数(即电流电压相位之间夹角的余弦值)，利用调压器调节电流大小模拟不同负载情况。这样的话，上述仿真测试系统就可以模拟和仿真智能变电站数字式电能表现场运行状况，通过与电能计量整体回路中的标准电子式电能表计量结果的比对，实现对数字式电能表测量准确性的测试，是一种全新的数字式电能表可信度评定系统，而且利用本发明可以仿真测试数字式电能表长期运行下测量的准确性，所以相比起现有的仅利用离散信号代码测试数字式电能表准确性的方式，得到的准确性结论在实际长期实际使用中更能被重现。
The invention discloses a simulation test system for measurement accuracy of a digital electric energy meter. The power factor (that is, the cosine value of the angle between the current and voltage phases) of the entire simulation test system can be adjusted by using a phase shifter at the same time. The regulator adjusts the current size to simulate different load conditions. In this way, the above-mentioned simulation test system can simulate and simulate the on-site operation status of the digital electric energy meter in the smart substation, and realize the measurement accuracy of the digital electric energy meter by comparing with the measurement results of the standard electronic electric energy meter in the overall circuit of electric energy measurement. The test is a brand-new digital electric energy meter reliability evaluation system, and the accuracy of the measurement under the long-term operation of the digital electric energy meter can be simulated and tested by using the present invention, so compared with the existing ones that only use discrete signal codes to test The method of accuracy of the digital electric energy meter, the accuracy conclusion obtained can be reproduced in the actual long-term actual use.
Description
技术领域technical field
本发明涉及电能计量领域，更为具体的说是一种智能变电站数字式电能表计量准确性仿真测试系统。The invention relates to the field of electric energy measurement, in particular to an intelligent substation digital electric energy meter measurement accuracy simulation test system.
背景技术Background technique
随着智能变电站大量投入运行，电子式互感器得到了广泛应用，与电子式互感器相匹配的数字式电能表也得到了广泛应用。与传统多功能电能表相比，数字式电能表完全实现了电能量的数字式计量，其与交换机通讯，接收来自电子式互感器报送过来的时间同步的数字电压信号、数字电流信号，对接收的数字信号进行处理完成计量工作。与传统计量方式相比，数字式摒弃了计量二次回路，就地将信号数字化的计量方式更显优越。理论上来讲，数字式电能表应该是能有效减少电能计量系统的综合误差，提高变电站测量系统的准确性。With a large number of smart substations put into operation, electronic transformers have been widely used, and digital energy meters matched with electronic transformers have also been widely used. Compared with the traditional multi-functional electric energy meter, the digital electric energy meter fully realizes the digital measurement of electric energy. It communicates with the switch and receives the time-synchronized digital voltage signal and digital current signal from the electronic transformer. The received digital signal is processed to complete the metering work. Compared with the traditional metering method, the digital method abandons the metering secondary circuit, and the metering method of digitalizing the signal on the spot is more superior. Theoretically speaking, the digital electric energy meter should be able to effectively reduce the comprehensive error of the electric energy measurement system and improve the accuracy of the substation measurement system.
国内外近年来陆续开展了对数字式电能表的校验方法的技术研究，目标均为尽可能使得经过某种校验后，得到一种更精确的校验数字式电能表，即数字式电能表计量的准确性很高。但使用经过现有方式校验后数字式电能表的多年经验表明，现有的数字式电能表在长期运行中，在不同工况下，如不同功率因素下、不同电流负载下时，准确性确实存疑。In recent years, technical research on the calibration method of digital energy meters has been carried out successively at home and abroad. The goal is to obtain a more accurate calibration digital energy meter, that is, digital energy The accuracy of meter measurement is very high. However, many years of experience in using digital watt-hour meters calibrated by existing methods shows that the existing digital watt-hour meters are not accurate enough under different working conditions, such as different power factors and different current loads, during long-term operation. Doubtful.
藉此，需要针对数字式电能表测量准确性的校验开展全面深入的研究，使得校验结论更加贴近实际变电站测量的需求。Therefore, it is necessary to carry out comprehensive and in-depth research on the verification of the measurement accuracy of the digital electric energy meter, so that the verification conclusion is closer to the actual substation measurement needs.
发明内容Contents of the invention
本发明提供了一种数字式电能表计量准确性仿真测试系统，以解决现有技术中的数字式电能表的准确性不高的问题。The invention provides a measurement accuracy simulation test system of a digital electric energy meter to solve the problem of low accuracy of the digital electric energy meter in the prior art.
为了解决上述技术问题，本发明公开了如下技术方案：In order to solve the above technical problems, the present invention discloses the following technical solutions:
一种数字式电能表计量准确性仿真测试系统，该系统包括三相工频电流输入源以及与所述三相工频电流输入源相连的标准电流互感器、负载光学电流互感器和/或负载电学电流互感器；还包括三相工频电压输入源以及与所述三相工频电压输入源相连的标准电压互感器和负载电子式电压互感器；还包括与所述标准电流互感器和标准电压互感器连接的标准电子式电能表；所述各个负载互感器与各自合并单元一侧连接，所述各自合并单元另一侧通过第一交换机连接的被测试数字式电能表。A simulation test system for measurement accuracy of a digital electric energy meter, the system includes a three-phase power frequency current input source and a standard current transformer connected to the three-phase power frequency current input source, a load optical current transformer and/or a load Electrical current transformer; also includes a three-phase power frequency voltage input source and a standard voltage transformer and a load electronic voltage transformer connected to the three-phase power frequency voltage input source; also includes the standard current transformer and the standard voltage transformer A standard electronic watt-hour meter connected to a voltage transformer; each load transformer is connected to one side of each merging unit, and the other side of each merging unit is connected to a tested digital watt-hour meter through a first switch.
还包括与所述三相工频电流输入源连接的移相器和升压器；以及与所述三相工频电压输入源连接的调压器和升流器；所述被测试数字式电能表与标准电子式电能表通过第二交换机与准确性测试单元连接。It also includes a phase shifter and a booster connected to the three-phase power frequency current input source; and a voltage regulator and a current booster connected to the three-phase power frequency voltage input source; the tested digital electric energy The meter is connected with the standard electronic watt-hour meter with the accuracy test unit through the second switch.
优选的，在上述数字式电能表计量准确性仿真测试系统中，所述移相器对功率因数的调节范围为0-1。Preferably, in the digital electric energy meter measurement accuracy simulation test system described above, the adjustment range of the phase shifter to the power factor is 0-1.
优选的，在上述数字式电能表计量准确性仿真测试系统中，所述调压器调节对负载电流的调节范围为0A至所述被测试数字式电能表的额定电流的120％。Preferably, in the digital power meter measurement accuracy simulation test system described above, the adjustment range of the voltage regulator to adjust the load current is from 0A to 120% of the rated current of the tested digital power meter.
优选的，在上述数字式电能表计量准确性仿真测试系统中，所述标准电子式电能表通过645规约连接至规约转换器后，再以61850协议通讯连接至第二交换机。Preferably, in the simulation test system for measurement accuracy of the digital electric energy meter, the standard electronic electric energy meter is connected to the protocol converter through the 645 protocol, and then connected to the second exchange through the 61850 protocol.
优选的，在上述数字式电能表计量准确性仿真测试系统中，所述被测试数字式电能表为两个，一个与所述负载光学电流互感器连接，另一个与所述负载电学电流互感器连接。Preferably, in the digital electric energy meter measurement accuracy simulation test system described above, there are two digital electric energy meters to be tested, one is connected to the load optical current transformer, and the other is connected to the load electrical current transformer connect.
优选的，在上述数字式电能表计量准确性仿真测试系统中，所述标准电子式电能表为高精度模拟表。Preferably, in the simulation test system for measurement accuracy of the digital electric energy meter, the standard electronic electric energy meter is a high-precision analog meter.
由以上技术方案可见，本发明提供的数字式电能表计量准确性仿真测试系统，可以通过同时利用移相器可以调节整个仿真测试系统的功率因数(即电流电压相位之间夹角的余弦值)，利用调压器调节电流大小模拟不同负载情况。这样的话，上述仿真测试系统就可以模拟和仿真智能变电站数字式电能表现场运行状况，通过与电能计量整体回路中的标准电子式电能表计量结果的比对，实现对数字式电能表测量准确性的测试，是一种全新的数字式电能表可信度评定系统，而且利用本发明可以仿真数字式电能表长期运行下测量的准确性，所以相比起现有的仅利用离散信号代码测试数字式电能表准确性的方式，得到的准确性结论在实际长期实际使用中更能被重现。It can be seen from the above technical solutions that the digital watt-hour meter measurement accuracy simulation test system provided by the present invention can adjust the power factor of the entire simulation test system (i.e. the cosine value of the angle between the current and voltage phases) by using the phase shifter at the same time , Use the voltage regulator to adjust the current to simulate different load conditions. In this way, the above-mentioned simulation test system can simulate and simulate the on-site operation status of the digital electric energy meter in the smart substation, and realize the measurement accuracy of the digital electric energy meter by comparing with the measurement results of the standard electronic electric energy meter in the overall circuit of electric energy measurement. The test is a brand-new digital electric energy meter reliability evaluation system, and the accuracy of measurement under the long-term operation of the digital electric energy meter can be simulated by using the present invention, so compared with the existing digital electric energy meter that only uses discrete signal codes to test The method of accuracy of the type electric energy meter, the accuracy conclusion obtained can be reproduced in the actual long-term actual use.
附图说明Description of drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，对于本领域普通技术人员而言，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, In other words, other drawings can also be obtained from these drawings on the premise of not paying creative work.
图1为本发明实施例提供的一种数字式电能表计量准确性仿真测试系统的结构示意图。FIG. 1 is a schematic structural diagram of a simulation test system for measurement accuracy of a digital electric energy meter provided by an embodiment of the present invention.
其中：in:
1-标准电压互感器，2-标准电流互感器，3-负载光学电流互感器，4-负载电学电流互感器，5-负载电子式电压互感器。1-standard voltage transformer, 2-standard current transformer, 3-load optical current transformer, 4-load electrical current transformer, 5-load electronic voltage transformer.
具体实施方式detailed description
本发明实施例提供了一种数字式电能表计量准确性仿真测试系统，解决了现有技术中的数字式电能表的准确性不高的问题。The embodiment of the present invention provides a digital electric energy meter measurement accuracy simulation test system, which solves the problem of low accuracy of the digital electric energy meter in the prior art.
为了使本技术领域的人员更好地理解本发明中的技术方案，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本发明保护的范围。In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.
参见图1，该图为本发明实施例提供的一种数字式电能表计量准确性仿真测试系统的结构示意图，如图所示，该系统包括三相工频电流输入源以及与所述三相工频电流输入源相连的标准电流互感器2、负载光学电流互感器3和/或负载电学电流互感器4。还包括三相工频电压输入源以及与所述三相工频电压输入源相连的标准电压互感器1和负载电子式电压互感器4。其中所有的上述标准互感器都是仿真系统中的虚拟部件。还包括与所述标准电流互感器2和标准电压互感器1连接的标准电子式电能表。所述各个负载互感器与各自合并单元一侧连接，所述各自合并单元另一侧通过第一交换机连接的被测试数字式电能表。Referring to Fig. 1, this figure is a schematic structural diagram of a simulation test system for measurement accuracy of a digital electric energy meter provided by an embodiment of the present invention. As shown in the figure, the system includes a three-phase power frequency current input source and the three-phase The standard current transformer 2, the load optical current transformer 3 and/or the load electrical current transformer 4 connected to the power frequency current input source. It also includes a three-phase power frequency voltage input source and a standard voltage transformer 1 and a load electronic voltage transformer 4 connected to the three-phase power frequency voltage input source. All of the above-mentioned standard transformers are virtual components in the simulation system. It also includes a standard electronic watt-hour meter connected to the standard current transformer 2 and the standard voltage transformer 1. Each of the load transformers is connected to one side of each merging unit, and the other side of each merging unit is connected to the digital electric energy meter to be tested through the first switch.
还包括与所述三相工频电流输入源连接的移相器和升压器；以及与所述三相工频电压输入源连接的调压器和升流器；所述被测试数字式电能表与标准电子式电能表通过第二交换机与准确性测试单元连接。本发明提供的数字式电能表计量准确性仿真测试系统，可以通过同时利用移相器可以调节整个仿真测试系统的功率因数(即电流电压相位之间夹角的余弦值)，利用调压器调节电流大小模拟不同负载情况。这样的话，上述仿真测试系统就可以模拟和仿真智能变电站数字式电能表现场运行状况，通过与电能计量整体回路中的标准电子式电能表计量结果的比对，实现对数字式电能表测量准确性的测试，是一种全新的数字式电能表可信度评定系统，而且利用本发明可以仿真数字式电能表长期运行下测量的准确性，所以相比起现有的仅利用离散信号代码测试数字式电能表准确性的方式，得到的准确性结论在实际长期实际使用中更能被重现。It also includes a phase shifter and a booster connected to the three-phase power frequency current input source; and a voltage regulator and a current booster connected to the three-phase power frequency voltage input source; the tested digital electric energy The meter is connected with the standard electronic watt-hour meter with the accuracy test unit through the second switch. The measurement accuracy simulation test system of the digital electric energy meter provided by the present invention can adjust the power factor (i.e. the cosine value of the angle between the current and voltage phases) of the entire simulation test system by using the phase shifter at the same time, and use the voltage regulator to adjust The magnitude of the current simulates different load conditions. In this way, the above-mentioned simulation test system can simulate and simulate the on-site operation status of the digital electric energy meter in the smart substation, and realize the measurement accuracy of the digital electric energy meter by comparing with the measurement results of the standard electronic electric energy meter in the overall circuit of electric energy measurement. The test is a brand-new digital electric energy meter reliability evaluation system, and the accuracy of measurement under the long-term operation of the digital electric energy meter can be simulated by using the present invention, so compared with the existing digital electric energy meter that only uses discrete signal codes to test The method of accuracy of the type electric energy meter, the accuracy conclusion obtained can be reproduced in the actual long-term actual use.
在上述数字式电能表计量准确性仿真测试系统中，为了真实的反映被测试数字化电能表经常被使用的真实工况的各种不同工作状态，所述移相器对功率因数的调节范围为0-1。这是一个较宽的调节范围，所以经过这样测试的准确性结果能够经受现实的检验。与此同时，再配合调压器对上述系统中符合的调节，模拟实际使用中的用电量变化时，数字化电能表对电能计量的情景。所述调压器调节对负载电流的调节范围为0A至所述被测试数字式电能表的额定电流的120％。In the measurement accuracy simulation test system of the above-mentioned digital electric energy meter, in order to truly reflect the various working states of the real working conditions in which the digital electric energy meter to be tested is often used, the adjustment range of the power factor of the phase shifter is 0 -1. This is a wide adjustment range, so the accuracy results of this test stand a reality check. At the same time, in conjunction with the adjustment of the voltage regulator to the above-mentioned system, the scene of the digital electric energy meter measuring the electric energy is simulated when the actual electricity consumption changes in use. The adjustment range of the load current adjusted by the voltage regulator is from 0A to 120% of the rated current of the tested digital electric energy meter.
在上述数字式电能表计量准确性仿真测试系统中，所述标准电子式电能表通过645规约连接至规约转换器后，再以61850协议通讯连接至第二交换机。In the simulation test system for measurement accuracy of the digital electric energy meter, the standard electronic electric energy meter is connected to the protocol converter through the 645 protocol, and then connected to the second exchange through the 61850 protocol.
为了全面考察，反映各种不同的电能输入对数字式电能表计量准确性的影响，所述被测试数字式电能表为两个，一个与所述负载光学电流互感器连接，另一个与所述负载电学电流互感器连接。在上述数字式电能表计量准确性仿真测试系统中，所述标准电子式电能表为高精度模拟表。In order to comprehensively investigate and reflect the influence of various electric energy inputs on the measurement accuracy of the digital electric energy meter, there are two digital electric energy meters to be tested, one is connected with the load optical current transformer, and the other is connected with the said load optical current transformer. Load electrical current transformer connection. In the simulation test system for measurement accuracy of the digital electric energy meter, the standard electronic electric energy meter is a high-precision analog meter.
通过以上的方法实施例的描述，所属领域的技术人员可以清楚地了解到本发明可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：只读存储器(ROM)、随机存取存储器(RAM)、磁碟或者光盘等各种可以存储程序代码的介质。Through the description of the above method embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions to make a A computer device (which may be a personal computer, a server, or a network device, etc.) executes all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program codes such as read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk.
本发明可以在由计算机执行的计算机可执行指令的一般上下文中描述，例如程序模块。一般地，程序模块包括执行特定任务或实现特定抽象数据类型的例程、程序、对象、组件、数据结构等等。也可以在分布式计算环境中实践本发明，在这些分布式计算环境中，由通过通信网络而被连接的远程处理设备来执行任务。在分布式计算环境中，程序模块可以位于包括存储设备在内的本地和远程计算机存储介质中。The invention 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, etc. that perform particular tasks or implement particular abstract data types. The invention 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 storage devices.
需要说明的是，在本文中，诸如“第一”和“第二”等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。It should be noted that in this article, relative terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these No such actual relationship or order exists between entities or operations. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.
以上所述仅是本发明的具体实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The foregoing is only a specific embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, some improvements and modifications can also be made without departing from the principle of the present invention. It should be regarded as the protection scope of the present invention.
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