CN107064855A - Secondary circuit voltage drop monitoring system and method - Google Patents
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Abstract
本发明提供了一种二次回路压降监测系统及方法，其中二次回路压降监测系统包括：第一校验采样终端、第二校验采样终端以及校验终端；第一校验采样终端连接于二次回路的电压互感器出口端，用于采集二次回路的电压互感器出口端的电压波形信号，并将其发送给校验终端；第二校验采样终端连接于二次回路的电能表输入端，用于采集二次回路的电能表输入端的电压波形信号，并将其发送给校验终端；校验终端接收电压互感器出口端的电压波形信号与电能表输入口端的电压波形信号，计算并监测二次回路的电压互感器二次回路压降。
The invention provides a secondary circuit pressure drop monitoring system and method, wherein the secondary circuit pressure drop monitoring system includes: a first verification sampling terminal, a second verification sampling terminal and a verification terminal; the first verification sampling terminal Connected to the outlet of the voltage transformer of the secondary circuit, it is used to collect the voltage waveform signal at the outlet of the voltage transformer of the secondary circuit and send it to the verification terminal; the second verification sampling terminal is connected to the electric energy of the secondary circuit The input terminal of the meter is used to collect the voltage waveform signal of the input terminal of the electric energy meter of the secondary circuit and send it to the verification terminal; the verification terminal receives the voltage waveform signal of the outlet port of the voltage transformer and the voltage waveform signal of the input port of the electric energy meter, Calculate and monitor voltage transformer secondary circuit voltage drop in secondary circuit.
Description
技术领域technical field
本发明涉及二次回路校验领域，尤其涉及一种二次回路压降监测系统及方法。The invention relates to the field of secondary circuit calibration, in particular to a secondary circuit pressure drop monitoring system and method.
背景技术Background technique
目前的二次回路压降远程校验技术主要是在现场设置标准计量装置，通过电流电压回路切换的方式，实现对现场多个电能表的误差校验，并将校验结果传回远程主站。但此校验方法存在着标准装置受现场环境影响大、切换回路复杂、监控数据有限等问题，不能对电能表的误差进行实时监测。每次在对电能表进行现场精度测试时，需要将被检表的电流回路与标准表串联、被检表的电压回路与标准表并联，这样就要对计量屏上的接线端子进行松开和旋紧等操作，多次操作以后常有接线端子松动或滑丝等现象，存在较大的故障隐患。并且由于现场不具备试验条件，因此需要将现场设备拆装并送到指定实验室进行检定或校准，即应像正常业务开展，由耗费大量的人力物力财力，为使用单位增加很多负担。The current secondary circuit voltage drop remote calibration technology is mainly to set up a standard metering device on site, and realize the error calibration of multiple electric energy meters on site by switching the current and voltage loops, and send the calibration results back to the remote master station . However, there are problems in this calibration method that the standard device is greatly affected by the field environment, the switching circuit is complicated, and the monitoring data is limited, so it cannot monitor the error of the electric energy meter in real time. Every time the on-site accuracy test is performed on the electric energy meter, it is necessary to connect the current circuit of the tested meter in series with the standard meter, and connect the voltage circuit of the tested meter in parallel with the standard meter. Tightening and other operations, after repeated operations, the terminals are often loose or slipped, and there are large potential failures. And because the site does not have the test conditions, it is necessary to disassemble the site equipment and send it to the designated laboratory for verification or calibration, that is, it should be carried out as normal business, which consumes a lot of manpower, material and financial resources, and adds a lot of burden to the user.
发明内容Contents of the invention
本发明的目的在于提供一种实时、准确、操作简便的远程校验计量装置，用于二次回路压降监测。The purpose of the present invention is to provide a real-time, accurate, and easy-to-operate remote calibration metering device for secondary circuit pressure drop monitoring.
为了达到上述目的，本发明提出了一种二次回路压降监测系统，包括：第一校验采样终端、第二校验采样终端以及校验终端；所述第一校验采样终端连接于二次回路的电压互感器出口端，用于采集所述二次回路的电压互感器出口端的电压波形信号，并将其发送给所述校验终端；所述第二校验采样终端连接于所述二次回路的电能表输入端，用于采集所述二次回路的电能表输入端的电压波形信号，并将其发送给所述校验终端；所述校验终端接收所述电压互感器出口端的电压波形信号与电能表输入口端的电压波形信号，并计算所述二次回路的电压互感器二次回路压降。In order to achieve the above object, the present invention proposes a secondary loop pressure drop monitoring system, including: a first verification sampling terminal, a second verification sampling terminal and a verification terminal; the first verification sampling terminal is connected to the two The outlet port of the voltage transformer of the secondary circuit is used to collect the voltage waveform signal of the outlet port of the voltage transformer of the secondary circuit and send it to the verification terminal; the second verification sampling terminal is connected to the The input terminal of the electric energy meter of the secondary circuit is used to collect the voltage waveform signal of the input terminal of the electric energy meter of the secondary circuit and send it to the verification terminal; the verification terminal receives the voltage waveform signal of the output port of the voltage transformer The voltage waveform signal and the voltage waveform signal at the input port of the electric energy meter are used to calculate the voltage drop of the secondary circuit of the voltage transformer of the secondary circuit.
进一步地，还包括第一隔离变压器，所述的第一校验采样终端通过第一隔离变压器连接二次回路的电压互感器出口端。Further, a first isolation transformer is also included, and the first verification sampling terminal is connected to the outlet port of the voltage transformer of the secondary circuit through the first isolation transformer.
进一步地，还包括第二隔离变压器，所述的第二校验采样终端通过第二隔离变压器连接二次回路的电能表输入端。Further, a second isolation transformer is also included, and the second verification sampling terminal is connected to the input terminal of the electric energy meter of the secondary circuit through the second isolation transformer.
进一步地，所述校验终端连接于所述第一校验采样终端与第二校验采样终端的连接方式为无线连接。Further, the verification terminal is connected to the first verification sampling terminal and the second verification sampling terminal in a wireless connection.
进一步地，所述第一校验采样终端与第二校验采样终端采用同步模块进行同步。Further, the first verification sampling terminal and the second verification sampling terminal are synchronized by using a synchronization module.
进一步地，所述同步模块为高精度GPS授时模块。Further, the synchronization module is a high-precision GPS timing module.
进一步地，还包括同步电缆，所述同步电缆连接于所述第一校验采样终端与第二校验采样终端，用于传送同步信号或/及测试数据。Further, a synchronization cable is further included, the synchronization cable is connected to the first verification sampling terminal and the second verification sampling terminal, and is used for transmitting synchronization signals or/and test data.
进一步地，所述第一校验采样终端与第二校验采样终端为多个，用于采集多个二次回路的电压互感器出口端的电压波形信号与电能表输入端的电压波形信号，并将其发送给所述校验终端。Further, there are multiple first verification sampling terminals and second verification sampling terminals, which are used to collect the voltage waveform signals at the outlet ends of the voltage transformers of multiple secondary circuits and the voltage waveform signals at the input ends of the electric energy meters, and It is sent to the verification terminal.
为了达到上述目的，还提出了一种二次回路压降监测方法，包括：使用第一校验采样终端采集二次回路的电压互感器出口端的电压波形信号；使用第二校验采样终端采集所述二次回路的电能表输入端的电压波形信号；使用校验终端根据所述电压互感器出口端的电压波形信号和电能表输入端的电压波形信号，计算所述二次回路的电压互感器二次回路压降。In order to achieve the above purpose, a method for monitoring the voltage drop of the secondary circuit is also proposed, including: using the first verification sampling terminal to collect the voltage waveform signal at the outlet end of the voltage transformer of the secondary circuit; using the second verification sampling terminal to collect the voltage waveform signal The voltage waveform signal of the input terminal of the electric energy meter of the secondary circuit; use the verification terminal to calculate the secondary circuit of the voltage transformer of the secondary circuit according to the voltage waveform signal of the output terminal of the voltage transformer and the voltage waveform signal of the input terminal of the electric energy meter pressure drop.
进一步地，所述使用第一校验采样终端采集二次回路的电压互感器出口端的电压波形信号的步骤与使用第二校验采样终端采集所述二次回路的电能表输入端的电压波形信号的步骤为同步实施。Further, the step of using the first verification sampling terminal to collect the voltage waveform signal at the outlet end of the voltage transformer of the secondary circuit is the same as using the second verification sampling terminal to collect the voltage waveform signal at the input end of the electric energy meter of the secondary circuit The steps are implemented synchronously.
本发明的有益效果在于，通过本发明在二次回路的首端与末端，也就是电压互感器的二次侧的端口以及电能表的输入端口，同时测量两处的电压数据并计算二次回路的压降，达到监测二次回路压降的目的，同步测量能有效保证角差的测量精度，并且安装方便无需额外架设线缆，可以实现实时监测。The beneficial effect of the present invention is that, through the present invention, at the head end and the end of the secondary circuit, that is, the port on the secondary side of the voltage transformer and the input port of the electric energy meter, the voltage data at two places are simultaneously measured and the secondary circuit is calculated. The pressure drop of the secondary circuit can be monitored to achieve the purpose of monitoring the pressure drop of the secondary circuit. The synchronous measurement can effectively ensure the measurement accuracy of the angle difference, and the installation is convenient without additional cables, and real-time monitoring can be realized.
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一简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，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, the accompanying drawings in the following description These are only some embodiments of the present invention, and those skilled in the art can also obtain other drawings based on these drawings without any creative effort.
图1为本发明实施例的二次回路压降监测系统与二次回路的连接示意图。Fig. 1 is a schematic diagram of the connection between the secondary circuit pressure drop monitoring system and the secondary circuit according to the embodiment of the present invention.
图2为本发明实施例的电压互感器二次回路压降测量原理图。Fig. 2 is a schematic diagram of voltage drop measurement of a voltage transformer secondary circuit according to an embodiment of the present invention.
图3为本发明实施例的电压互感器二次回路电压向量图。Fig. 3 is a voltage vector diagram of a secondary circuit of a voltage transformer according to an embodiment of the present invention.
图4为本发明另一实施例的二次回路压降监测系统与二次回路的连接示意图。Fig. 4 is a schematic diagram of the connection between the secondary circuit pressure drop monitoring system and the secondary circuit according to another embodiment of the present invention.
图5为本发明实施例的二次回路压降监测方法的流程图。Fig. 5 is a flow chart of a secondary circuit pressure drop monitoring method according to an embodiment of the present invention.
具体实施方式detailed description
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，本领域相关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，都属于本发明的保护的范围。The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.
在电网企业同用户结算的关口处，需要安装电能计量设备。在实际电路中，电压互感器的一次侧连接于一次回路，二次侧连接于二次回路。该二次回路是由二次设备互相连接，构成对一次设备进行监测、控制、调节和保护的电气回路。由于二次回路中导线较长，并且还有各种接点，并且在二次回路的末端或中间部位会接有各种负载，所以就会产生二次回路的压降。二次回路上的压降会导致电能表端子上的电压不等于电压互感器二次侧的端口电压，其幅值和相位都会发生变化，从而给电能和功率的测量带来误差。本发明的主要采用在二次回路的首端与末端，也就是电压互感器的二次侧的端口以及电能表的输入端口，同时测量两处的电压数据并计算二次回路的压降，从而实现监测二次回路压降的目的。主要用于变电站内的发电上网关口、跨网结算关口及重要用户计量二次回路电压互感器压降的校验。其它情况，可根据计量装置重要程度、二次回路长短电能表准确度等级配置高速采集终端的采集路数，实现电压互感器二次回路压降的监测。Electric energy metering equipment needs to be installed at the gateway where power grid enterprises settle with users. In the actual circuit, the primary side of the voltage transformer is connected to the primary circuit, and the secondary side is connected to the secondary circuit. The secondary circuit is connected to each other by the secondary equipment to form an electrical circuit for monitoring, controlling, regulating and protecting the primary equipment. Since the wire in the secondary circuit is long, and there are various contacts, and various loads are connected at the end or middle of the secondary circuit, a voltage drop in the secondary circuit will occur. The voltage drop on the secondary circuit will cause the voltage on the terminal of the electric energy meter to be not equal to the port voltage on the secondary side of the voltage transformer, and its amplitude and phase will change, which will bring errors to the measurement of electric energy and power. The present invention mainly adopts the first end and the end of the secondary circuit, that is, the port on the secondary side of the voltage transformer and the input port of the electric energy meter, and simultaneously measures the voltage data at the two places and calculates the voltage drop of the secondary circuit, thereby Realize the purpose of monitoring the pressure drop of the secondary circuit. It is mainly used for the verification of the voltage drop of the secondary circuit voltage transformer of the power generation gateway in the substation, the cross-network settlement gateway and the metering of important users. In other cases, the number of acquisition channels of the high-speed acquisition terminal can be configured according to the importance of the metering device, the length of the secondary circuit, and the accuracy level of the electric energy meter to realize the monitoring of the voltage drop in the secondary circuit of the voltage transformer.
图1为本发明实施例的二次回路压降监测系统与二次回路的连接示意图。如图1所示，本实施例提出的二次回路压降监测系统包括：第一校验采样终端、第二校验采样终端以及校验终端；所述第一校验采样终端连接于二次回路的电压互感器出口端，用于采集所述二次回路的电压互感器出口端的电压波形信号，并将其发送给所述校验终端；所述第二校验采样终端连接于所述二次回路的电能表输入端，用于采集所述二次回路的电能表输入端的电压波形信号，并将其发送给所述校验终端；所述校验终端接收所述电压互感器出口端的电压波形信号与电能表输入口端的电压波形信号，并计算所述二次回路的电压互感器二次回路压降。Fig. 1 is a schematic diagram of the connection between the secondary circuit pressure drop monitoring system and the secondary circuit according to the embodiment of the present invention. As shown in Figure 1, the secondary loop pressure drop monitoring system proposed in this embodiment includes: a first verification sampling terminal, a second verification sampling terminal and a verification terminal; the first verification sampling terminal is connected to the secondary The outlet end of the voltage transformer of the loop is used to collect the voltage waveform signal at the outlet end of the voltage transformer of the secondary loop and send it to the verification terminal; the second verification sampling terminal is connected to the two The input end of the electric energy meter of the secondary circuit is used to collect the voltage waveform signal of the electric energy meter input end of the secondary circuit, and send it to the verification terminal; the verification terminal receives the voltage at the outlet end of the voltage transformer The waveform signal and the voltage waveform signal at the input port of the electric energy meter are used to calculate the voltage drop of the secondary circuit of the voltage transformer of the secondary circuit.
图2为本发明实施例的电压互感器二次回路压降测量原理图，图3为本发明实施例的电压互感器二次回路电压向量图。结合图2与图3所示，以三相电中任一单相的二次回路为例，本实施例的二次回路压降监测系统监测电压互感器二次回路压降的计算原理如下：Fig. 2 is a schematic diagram of voltage drop measurement of a voltage transformer secondary circuit according to an embodiment of the present invention, and Fig. 3 is a voltage vector diagram of a secondary circuit of a voltage transformer according to an embodiment of the present invention. As shown in Fig. 2 and Fig. 3, taking the secondary circuit of any single phase in the three-phase electricity as an example, the calculation principle of the secondary circuit voltage drop monitoring system of the present embodiment to monitor the voltage transformer secondary circuit voltage drop is as follows:
电压互感器二次回路压降分为比差f和角差δ，比差f为电压互感器出口端和电能表输入端之间电压的幅值差相对于二次实际电压值的百分数，角差δ为电压互感器出口端和和电能表输入端之间电压的相位差。The voltage drop of the secondary circuit of the voltage transformer is divided into the ratio difference f and the angle difference δ, the ratio difference f is the percentage of the voltage amplitude difference between the outlet end of the voltage transformer and the input end of the electric energy meter relative to the secondary actual voltage value, and the angle difference is The difference δ is the phase difference of the voltage between the output terminal of the voltage transformer and the input terminal of the electric energy meter.
电压互感器二次线路压降的计算公式为：The formula for calculating the voltage drop of the voltage transformer secondary line is:
电压互感器二次回路的比差值为：The ratio difference of the voltage transformer secondary circuit is:
电压互感器二次回路压降的角差值为：The angle difference of voltage drop in secondary circuit of voltage transformer is:
为第一校验采样终端测量的二次回路的电压互感器出口端的电压向量，UT为其幅值；为第二校验采样终端测量的二次回路的电能表输入端的电压向量,UM为其幅值；图3中I为PT负载电流；R为电压互感器二次线路电阻(包括电缆电阻、保险、开关及接头等的电阻))；f为电压互感器二次回路压降的比差，δ为电压互感器二次回路压降的角差。 is the voltage vector at the outlet end of the voltage transformer of the secondary circuit measured by the first verification sampling terminal, and U T is its amplitude; Be the voltage vector of the watt-hour meter input end of the secondary circuit measured by the second calibration sampling terminal, U M is its amplitude; I is the PT load current among Fig. 3; R is the voltage transformer secondary line resistance (comprising cable resistance, Insurance, switch and connector resistance)); f is the ratio difference of the voltage drop of the secondary circuit of the voltage transformer, and δ is the angle difference of the voltage drop of the secondary circuit of the voltage transformer.
具体实施时，第一校验采样终端与第二校验采样终端在出厂校准时，采用同步多点校准方法，尽可能保证第一校验采样终端与第二校验采样终端误差一致，避免仪器本身误差对测量结果造成影响。第一校验采样终端与第二校验采样终端采用数字采样方式进行采集电压波形信号，由于变电站电压一般都比较稳定，不会存在宽范围波动，第一校验采样终端测量互感器输出电压时可以将量程调至最大位置，能够最大限度的发挥24位AD采样芯片的性能，采样精度基本可达到0.5‰，基本能够保证二次回路压降的测量。第一校验采样终端与第二校验采样终端在测量时，电压回路取样采用高阻抗法，输入阻抗2MΩ以上，不会因接入了校验监测设备破坏原有二次回路的状态。During specific implementation, when the first verification sampling terminal and the second verification sampling terminal are calibrated at the factory, a synchronous multi-point calibration method is adopted to ensure that the errors of the first verification sampling terminal and the second verification sampling terminal are consistent as much as possible, so as to avoid instrument The error itself affects the measurement results. The first verification sampling terminal and the second verification sampling terminal use digital sampling to collect voltage waveform signals. Since the voltage of the substation is generally relatively stable and there will be no wide-range fluctuations, when the first verification sampling terminal measures the output voltage of the transformer The range can be adjusted to the maximum position, which can maximize the performance of the 24-bit AD sampling chip, and the sampling accuracy can basically reach 0.5‰, which can basically guarantee the measurement of the secondary circuit voltage drop. When measuring the first calibration sampling terminal and the second calibration sampling terminal, the voltage loop sampling adopts the high impedance method, and the input impedance is above 2MΩ, which will not destroy the state of the original secondary loop due to the connection of calibration monitoring equipment.
具体实施时，在第一校验采样终端与二次回路的电压互感器出口端之间，可增设第一隔离变压器，所述的第一校验采样终端通过第一隔离变压器连接二次回路的电压互感器出口端，通过第一隔离变压器的一次侧与二次侧的隔离作用保护第一采样终端，同时也可以隔离危险电压保护人身安全。同样的，在第二校验采样终端与二次回路的电能表输入端之间，也可增设第二隔离变压器，所述的第二校验采样终端通过第二隔离变压器连接二次回路的电能表输入端，也可以实现隔离保护第二采样终端，隔离危险电压保护人身安全的作用。During specific implementation, between the first verification sampling terminal and the voltage transformer outlet end of the secondary circuit, a first isolation transformer can be added, and the first verification sampling terminal is connected to the secondary circuit through the first isolation transformer. The outlet end of the voltage transformer protects the first sampling terminal through the isolation function of the primary side and the secondary side of the first isolation transformer, and can also isolate dangerous voltages to protect personal safety. Similarly, a second isolation transformer can also be added between the second verification sampling terminal and the input terminal of the electric energy meter of the secondary circuit, and the second verification sampling terminal is connected to the electric energy of the secondary circuit through the second isolation transformer. The input terminal of the meter can also realize the isolation protection of the second sampling terminal, and the function of isolating dangerous voltage and protecting personal safety.
具体实施时，校验终端连接于第一校验采样终端与第二校验采样终端的连接方式为无线连接，可以避免铺设测量电缆，方便监测，可以实现实时监测。为了保证测量时间同步，第一校验采样终端与第二校验采样终端采用同步模块进行同步，通过高精度同步信号，能有效保证角差的测量精度，同步模块为高精度GPS授时模块。同步模块可以优选为瑞士生产的LEA-6TGPS模块，其能为需要位置信息的应用提供精确的GPS授时服务，该GPS模块能够配置输出的时间脉冲频率，通过使用量化误差信息去补偿时间脉冲中的颗粒误差。当第一校验采样终端与第二校验采样终端在固定位置下运行时，GPS模块可以在只有一颗卫星可见度的情况下进行授时。这意味着即使在GPS卫星信号条件不利或天空可见度不佳的情况下也能输出准确的时间信息。该模块的内置的时标和计数器能够对外部事件输入进行精确的时间测量。当主从校验采集终端处于卫星信号屏蔽区域时，可采用专用的同步电缆、同步光纤等方式进行同步，只是需要布设同步电缆、光纤，该同步电缆或光线连接于所述第一校验采样终端与第二校验采样终端，用于传送同步信号或/及测试数据，同样起到保证二次回路的电压互感器出口端的电压波形信号与二次回路的电能表输入端的电压波形信号同时监测的作用。During specific implementation, the connection mode of the verification terminal connected to the first verification sampling terminal and the second verification sampling terminal is a wireless connection, which can avoid laying measurement cables, facilitate monitoring, and realize real-time monitoring. In order to ensure the synchronization of the measurement time, the first verification sampling terminal and the second verification sampling terminal are synchronized by a synchronization module. Through a high-precision synchronization signal, the measurement accuracy of the angular difference can be effectively guaranteed. The synchronization module is a high-precision GPS timing module. The synchronization module can preferably be the LEA-6TGPS module produced in Switzerland, which can provide accurate GPS timing services for applications that require position information. grain error. When the first verification sampling terminal and the second verification sampling terminal operate at fixed positions, the GPS module can perform time service when only one satellite is visible. This means that accurate time information is output even under adverse GPS satellite signal conditions or poor sky visibility. The module's built-in time markers and counters enable precise time measurement of external event inputs. When the master-slave verification acquisition terminal is in the satellite signal shielding area, special synchronization cables, synchronization optical fibers, etc. can be used for synchronization, but synchronization cables and optical fibers need to be laid, and the synchronization cables or optical fibers are connected to the first verification sampling terminal and the second verification sampling terminal, used to transmit synchronous signals or/and test data, also to ensure the simultaneous monitoring of the voltage waveform signal at the output end of the voltage transformer of the secondary circuit and the voltage waveform signal at the input end of the electric energy meter of the secondary circuit effect.
图4为本发明另一实施例的二次回路压降监测系统与二次回路的连接示意图。如图4所示，第一校验采样终端与第二校验采样终端为多个，用于采集多个二次回路的电压互感器出口端的电压波形信号与电能表输入端的电压波形信号，并将其发送给校验终端。该校验终端设置于计量远程校验主站内，接收多个二次回路的电压互感器出口端的电压波形信号与电能表输入端的电压波形信号，对其进行计算，计算出各个二次回路的压降后，将监测结果提供给技术人员，方便技术人员对多个二次回路进行统一监测与管理，并且节省了人力消耗。Fig. 4 is a schematic diagram of the connection between the secondary circuit pressure drop monitoring system and the secondary circuit according to another embodiment of the present invention. As shown in Figure 4, there are multiple first verification sampling terminals and second verification sampling terminals, which are used to collect the voltage waveform signals at the outlet ends of the voltage transformers of multiple secondary circuits and the voltage waveform signals at the input ends of the electric energy meters, and Send it to the verification terminal. The calibration terminal is set in the metering remote calibration master station, receives the voltage waveform signals of the voltage transformer outlets of multiple secondary circuits and the voltage waveform signals of the input terminals of the electric energy meter, calculates them, and calculates the voltage of each secondary circuit. After falling, the monitoring results are provided to the technicians, which is convenient for the technicians to monitor and manage multiple secondary circuits in a unified manner, and saves manpower consumption.
在介绍了本发明实施例的一种二次回路压降监测系统之后，接下来，对本发明实施例的一种二次回路压降监测方法进行介绍。After introducing a secondary circuit pressure drop monitoring system according to an embodiment of the present invention, next, a secondary circuit pressure drop monitoring method according to an embodiment of the present invention will be introduced.
图5为本发明实施例的二次回路压降监测方法的流程图。如图5所示，本实施例提出的二次回路压降监测方法，包括：Fig. 5 is a flow chart of a secondary circuit pressure drop monitoring method according to an embodiment of the present invention. As shown in Figure 5, the secondary circuit pressure drop monitoring method proposed in this embodiment includes:
S100，使用第一校验采样终端采集二次回路的电压互感器出口端的电压波形信号；S100, using the first verification sampling terminal to collect the voltage waveform signal at the outlet end of the voltage transformer of the secondary circuit;
S200，使用第二校验采样终端采集所述二次回路的电能表输入端的电压波形信号；S200, using the second verification sampling terminal to collect the voltage waveform signal at the input terminal of the electric energy meter of the secondary circuit;
S300，使用校验终端根据所述电压互感器出口端的电压波形信号和电能表输入端的电压波形信号，计算所述二次回路的电压互感器二次回路压降。S300. Calculate the secondary circuit voltage drop of the voltage transformer in the secondary circuit according to the voltage waveform signal at the outlet end of the voltage transformer and the voltage waveform signal at the input end of the electric energy meter by using the verification terminal.
在具体实施时，为了保证测量时间同步，使用第一校验采样终端采集二次回路的电压互感器出口端的电压波形信号的步骤S100与使用第二校验采样终端采集所述二次回路的电能表输入端的电压波形信号的步骤S200为同步实施，第一校验采样终端与第二校验采样终端采用同步模块进行同步，通过高精度同步测量，能有效保证角差的测量精度。During specific implementation, in order to ensure the synchronization of measurement time, the step S100 of using the first verification sampling terminal to collect the voltage waveform signal at the outlet end of the voltage transformer of the secondary circuit is the same as using the second verification sampling terminal to collect the electric energy of the secondary circuit The step S200 of the voltage waveform signal at the input terminal of the meter is implemented synchronously. The first verification sampling terminal and the second verification sampling terminal are synchronized by a synchronization module. Through high-precision synchronous measurement, the measurement accuracy of the angle difference can be effectively guaranteed.
本发明的有益效果在于，通过本发明通过在二次回路的首端与末端，也就是电压互感器的二次侧的端口以及电能表的输入端口，同时测量两处的电压数据并计算二次回路的压降，达到监测二次回路压降的目的，同步测量能有效保证角差的测量精度，并且安装方便无需额外架设线缆，可以实现实时监测。The beneficial effect of the present invention is that, through the present invention, the voltage data at two places are simultaneously measured and the secondary circuit is calculated through the port on the secondary side of the voltage transformer and the input port of the electric energy meter through the present invention. The pressure drop of the circuit can achieve the purpose of monitoring the pressure drop of the secondary circuit. The synchronous measurement can effectively ensure the measurement accuracy of the angle difference, and the installation is convenient without additional cables, and real-time monitoring can be realized.
以上所述的具体实施方式，对本发明的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本发明的具体实施方式而已，并不用于限定本发明的保护范围，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.
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