CN203101622U - Testing system for 220 V output voltage multi-output voltage mutual inductor - Google Patents
Testing system for 220 V output voltage multi-output voltage mutual inductor Download PDFInfo
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Abstract
本实用新型涉及一种220V输出电压的多输出电压互感器测试系统,它由自动调压变压器、自动控制及切换电路、第一负载箱、第二负载箱和互感器校验仪组成;所述自动控制及切换电路中的自动控制电路的一路输出端接自动调压变压器的控制端,自动调压变压器的输出端接被测多输出电压互感器的初级,所述被测多输出电压互感器的次级各绕组接所述自动控制及切换电路中的自动切换电路,所述第一负载箱和第二负载箱分别与被测多输出电压互感器双向连接。本实用新型的优点是可以对220V输出电压的多输出电压互感器进行自动测试,可在多个输出端之间进行自动切换,且使用方法简单,测试数据准确可靠。
The utility model relates to a multi-output voltage transformer testing system with 220V output voltage, which is composed of an automatic voltage regulating transformer, an automatic control and switching circuit, a first load box, a second load box and a transformer calibrator; One output terminal of the automatic control circuit in the automatic control and switching circuit is connected to the control terminal of the automatic voltage regulating transformer, and the output terminal of the automatic voltage regulating transformer is connected to the primary stage of the multi-output voltage transformer under test, and the multi-output voltage transformer under test The secondary windings of each are connected to the automatic switching circuit in the automatic control and switching circuit, and the first load box and the second load box are respectively bidirectionally connected to the multi-output voltage transformer under test. The utility model has the advantages that it can automatically test the multi-output voltage transformer with 220V output voltage, can automatically switch between multiple output terminals, and has a simple use method and accurate and reliable test data.
Description
技术领域 technical field
本实用新型涉及一种220V输出电压的多输出电压互感器测试系统。 The utility model relates to a multi-output voltage transformer testing system with 220V output voltage.
背景技术 Background technique
目前的互感器测试系统的二次电压都为 V、100V,最大150V,而且仅可进行单路测试,对于多输出的电压互感器需要手动连接不同的二次测试回路,没有多输出自动切换的而且二次输出电压能够达到220V的多量限电压互感器测试系统。 The secondary voltage of the current transformer test system is V, 100V, maximum 150V, and only single-channel test can be performed. For multi-output voltage transformers, different secondary test circuits need to be manually connected. There is no multi-output automatic switching and the secondary output voltage can reach 220V. Transformer test system.
单相智能电表的供电电压为220V,其测试装置一般为多表位,24表位或者48表位,采用24路或者48路输出的二次电压为220V的电压互感器进行各表位供电,输入电压同样为220V。该多路输出的电压互感器的计量准确性关系到智能电能表检测的精度问题,需要通过定期检测保证其精度。此类电压互感器在有智能电表检测装置的各网省供电公司以及各地市供电公司的计量中心均由使用,涉及面较广。 The power supply voltage of the single-phase smart meter is 220V, and its test device is generally multi-meter, 24-meter or 48-meter, and the voltage transformer with the secondary voltage of 24 or 48 outputs is used to supply power to each meter. The input voltage is also 220V. The measurement accuracy of the multi-output voltage transformer is related to the detection accuracy of the smart energy meter, and its accuracy needs to be guaranteed through regular detection. This type of voltage transformer is used in the metering centers of power supply companies in various provinces and cities with smart meter detection devices, and it involves a wide range of areas.
一般电压互感器的二次输出电压为100V或者V,因此互感器测试系统能够测试的二次电压也是100V或者V,最大为150V,不能够对智能电表检测装置中的输出电压为220V的电压互感器进行误差测试,也就无法保证智能电表检测装置的准确性。 The secondary output voltage of the general voltage transformer is 100V or V, so the secondary voltage that the transformer test system can test is also 100V or V, the maximum is 150V, and the error test of the voltage transformer with an output voltage of 220V in the smart meter detection device cannot be performed, and the accuracy of the smart meter detection device cannot be guaranteed.
实用新型内容 Utility model content
本实用新型所要解决的技术问题是提供一种220V输出电压的多输出电压互感器测试系统。 The technical problem to be solved by the utility model is to provide a multi-output voltage transformer testing system with 220V output voltage.
本实用新型解决其技术问题所采用的技术方案: The technical solution adopted by the utility model to solve its technical problems:
本实用新型由自动调压变压器、自动控制及切换电路、第一负载箱、第二负载箱和互感器校验仪组成;所述自动控制及切换电路中的自动控制电路的一路输出端接自动调压变压器的控制端,自动调压变压器的输出端接被测多输出电压互感器的初级,所述被测多输出电压互感器的次级各绕组接所述自动控制及切换电路中的自动切换电路,所述第一负载箱和第二负载箱分别与被测多输出电压互感器双向连接,所述被测多输出电压互感器与互感器校验仪双向连接,所述自动控制及切换电路与互感器校验仪双向连接。 The utility model is composed of an automatic voltage regulating transformer, an automatic control and switching circuit, a first load box, a second load box and a transformer calibrator; one output terminal of the automatic control circuit in the automatic control and switching circuit is automatically connected The control terminal of the voltage regulating transformer, the output terminal of the automatic voltage regulating transformer is connected to the primary of the measured multi-output voltage transformer, and the secondary windings of the measured multi-output voltage transformer are connected to the automatic control and switching circuit. Switching circuit, the first load box and the second load box are respectively bidirectionally connected with the multi-output voltage transformer under test, the multi-output voltage transformer under test is bidirectionally connected with the transformer calibrator, and the automatic control and switching The circuit is bidirectionally connected with the transformer calibrator.
本系统通过改进普通的互感器校验仪,使其能够测试额定电压220V的多输出互感器的误差数据,改进了普通的电压互感器的负载箱,使其能够作为220V额定电压互感器的试验负载箱。利用自动控制及切换电路控制自动调压变压器和被测多输出电压互感器各二次绕组之间的切换,实现了对额定电压为220V的多输出电压互感器的各输出绕组误差精度的自动测试功能。本实用新型只需要比较标准表用绕组和被测多输出电压互感器的各输出绕组之间的误差就可以。 This system improves the common transformer calibrator so that it can test the error data of the multi-output transformer with a rated voltage of 220V, and improves the load box of a common voltage transformer so that it can be used as a test for a 220V rated voltage transformer. load box. The automatic control and switching circuit is used to control the switching between the automatic voltage regulating transformer and the secondary windings of the tested multi-output voltage transformer, and the automatic test of the error accuracy of each output winding of the multi-output voltage transformer with a rated voltage of 220V is realized. Function. The utility model only needs to compare the errors between the standard meter windings and the output windings of the measured multi-output voltage transformer.
本实用新型的有益效果如下: The beneficial effects of the utility model are as follows:
(1)可以对220V输出电压的多输出电压互感器进行自动测试,可在多个输出端之间进行自动切换。 (1) It can automatically test the multi-output voltage transformer with 220V output voltage, and can automatically switch between multiple output terminals.
(2)使用方法简单,测试数据准确可靠。 (2) The method of use is simple, and the test data is accurate and reliable.
附图说明 Description of drawings
图1为本实用新型的原理框图。 Fig. 1 is a functional block diagram of the utility model.
图2为自动控制及切换电路的电路原理图。 Figure 2 is a schematic diagram of the automatic control and switching circuit.
图3为自动切换电路的继电器J1—Jn的常开触点的切换电路原理图。 Fig. 3 is a schematic diagram of the switching circuit of the normally open contacts of the relays J1-Jn of the automatic switching circuit.
图4为HEF-H型互感器校验仪的内部电路原理图。 Figure 4 is a schematic diagram of the internal circuit of the HEF-H transformer calibrator.
图5为Fy50负载箱的内部电路原理图(自耦变压器B1除外)。 Figure 5 is a schematic diagram of the internal circuit of the Fy50 load bank (except for the autotransformer B1).
图6为本实用新型的逻辑功能图。 Fig. 6 is a logic function diagram of the utility model.
具体实施方式 Detailed ways
由图1—图6所述的实施例可知,它由自动调压变压器1、自动控制及切换电路2、第一负载箱3、第二负载箱4和互感器校验仪5组成;所述自动控制及切换电路中的自动控制电路的一路输出端接自动调压变压器1的控制端,自动调压变压器1的输出端接被测多输出电压互感器6的初级,所述被测多输出电压互感器6的次级各绕组接所述自动控制及切换电路2中的自动切换电路,所述第一负载箱3和第二负载箱4分别与被测多输出电压互感器6双向连接,所述被测多输出电压互感器6与互感器校验仪5双向连接,所述自动控制及切换电路2与互感器校验仪5双向连接。
As can be seen from the embodiment described in Fig. 1-Fig. 6, it is composed of an automatic
所述自动控制及切换电路2由自动控制电路和自动切换电路组成,自动控制电路由单片机U1及其外围元件晶体y0、电容C1—C2、步进电机驱动芯片U2组成;
Described automatic control and switching
所述步进电机驱动芯片U2的输入端接在单片机U1的PB0—PB5口;所述单片机U1的SDA口和SDL口分别接互感器校验仪5的相应输入端;
The input terminal of the stepper motor driver chip U2 is connected to the PB0-PB5 mouth of the single-chip microcomputer U1; the SDA port and the SDL mouth of the single-chip microcomputer U1 are respectively connected to the corresponding input terminals of the
所述自动切换电路由晶体管VT1—VTn、继电器J1—Jn、续流二极管D1—Dn、电阻R1—Rn组成;晶体管VT1—VTn的基极分别经过电阻R1—Rn接单片机U1的PA0—PAn口,继电器J1—Jn分别接在晶体管VT1—VTn的集电极与地之间。 The automatic switching circuit is composed of transistors VT1-VTn, relays J1-Jn, freewheeling diodes D1-Dn, and resistors R1-Rn; the bases of transistors VT1-VTn are respectively connected to PA0-PAn ports of single-chip microcomputer U1 through resistors R1-Rn , The relays J1-Jn are respectively connected between the collectors of the transistors VT1-VTn and the ground.
所述继电器J1—Jn的常开触点J1-1—Jn-1的一端均接互感器校验仪5的1脚,其另一端依次分别接被测多输出电压互感器6的二次绕组L1—Ln的一端,被测多输出电压互感器6的二次绕组L1—Ln的另一端均接互感器校验仪5的4脚;
One end of the normally open contact J1-1-Jn-1 of the relay J1-Jn is connected to pin 1 of the
所述第一负载箱3的接线端子M和N接在被测多输出电压互感器6的二次绕组L0的两端,所述二次绕组L0的一端接互感器校验仪5的4脚,其另一端分别接互感器校验仪5的2脚和3脚;
The connecting terminals M and N of the
所述第二负载箱4的接线端子M与被测多输出电压互感器6的二次绕组的公共连接端相连接,第二负载箱4的接线端子N与所述常开触点J1-1—Jn-1的公共连接端相连接;
The connection terminal M of the
所述互感器校验仪5的1脚和2脚为误差输入端△U;互感器校验仪5的3脚和4脚为标准电压输入端Up。
所述单片机 U1的型号为Atmega16,步进电机驱动芯片U2的型号为L298N。 The model of the single-chip microcomputer U1 is Atmega16, and the model of the stepper motor driver chip U2 is L298N.
所述互感器校验仪5的型号为HEF-H,并且其中的二次降压变压器Tp的变比改为原变比的2.2倍,其中的转换电阻RU的阻值改为原阻值的2.2倍。
The model of the
所述第一负载箱3和第二负载箱4的型号为Fy50,并且在第一负载箱3和第二负载箱4的输入端接一个220/110V的自耦合变压器B1。
The model of the
所述自动调压变压器1为步进电机控制的自动调压变压器。
The automatic
图4中TB为一只辅助电压互感器,K1、K2为单刀双掷开关,T为变压器,其次级绕组接有交流指零仪D。G为可调电导箱,C为可调电容箱;RU为转换电阻,K、D为测差端。 In Figure 4, T B is an auxiliary voltage transformer, K1 and K2 are single-pole double-throw switches, T is a transformer, and its secondary winding is connected to an AC zero indicator D. G is the adjustable conductance box, C is the adjustable capacitance box; R U is the conversion resistance, K and D are the difference measuring terminals.
在图5中,r10—rn0为电阻,r1—rn为电阻,L10—Ln0为电感,K10—Kn0为单刀双掷开关。 In Fig. 5, r10-rn0 is a resistor, r1-rn is a resistor, L10-Ln0 is an inductor, and K10-Kn0 is a single-pole double-throw switch.
在图6中,本系统向自动调压变压器1中的步进电机发出控制信号,驱动电源升压,通过互感器校验仪5监视升压情况,根据电压互感器检定规程,在额定电压的80%,100%,120%三个点读取互感器校验仪5测出的误差数据,并进行记录。完成一次绕组的误差测试后,控制自动调压变压器1降压,并向自动切换电路发出控制命令,将测试通道切换至被测多输出电压互感器的下一个二次绕组,重复误差测试过程,直至完成被测多输出电压互感器所有二次绕组的测试。
In Fig. 6, the system sends a control signal to the stepping motor in the automatic
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CN107728092A (en) * | 2017-10-02 | 2018-02-23 | 国网山西省电力公司电力科学研究院 | The automatic precision pre-check device and method of calibration of Transformer Winding no-load voltage ratio tester |
CN112557741A (en) * | 2020-12-25 | 2021-03-26 | 广东电网有限责任公司 | Secondary voltage detection device and detection method for voltage transformer |
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