CN201589855U - Detection device of relay protection testing device - Google Patents

Detection device of relay protection testing device Download PDF

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Publication number
CN201589855U
CN201589855U CN2009202417610U CN200920241761U CN201589855U CN 201589855 U CN201589855 U CN 201589855U CN 2009202417610 U CN2009202417610 U CN 2009202417610U CN 200920241761 U CN200920241761 U CN 200920241761U CN 201589855 U CN201589855 U CN 201589855U
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CN
China
Prior art keywords
circuit
relay
voltage
current
dsp processor
Prior art date
Application number
CN2009202417610U
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Chinese (zh)
Inventor
周勤
马亮
马建
Original Assignee
江西省电力科学研究院
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Application filed by 江西省电力科学研究院 filed Critical 江西省电力科学研究院
Priority to CN2009202417610U priority Critical patent/CN201589855U/en
Application granted granted Critical
Publication of CN201589855U publication Critical patent/CN201589855U/en

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Abstract

The utility model discloses a detection device of a relay protection testing device. The detection device not only can achieve high-precision measurement (grade 0.05) to AC/DC voltage and current parameters of the relay protection testing device and high-precision measurement (0.05 degrees) to AC voltage and current phase position, but also can achieve measurement to the actuation time of the relay protection testing device, in addition, the detection device can achieve detections to the total harmonic distortion, the response speed and the synchronicity of the output amplitude of the AC voltage source and the AC current source of the relay protection testing device. The detection device comprises a signal sampling circuit, an A/D converting circuit, a DSP, a color liquid crystal display and a keyboard. The signal sampling circuit is connected with the A/D converting circuit, the A/D converting circuit is connected with the DSP for being responsible for signal sampling, processing and calculating as well as the displaying of 8.4 inch TFT color LCD and the processing of the keyboard; the photoelectric isolation circuit is connected with the DSP for being responsible for conveying signals by taking light as medium under a condition of electrical isolation and for isolating the input and output circuits.

Description

The relay-protection tester pick-up unit

Technical field

The utility model relates to a kind of pick-up unit that detects relay-protection tester, especially can detect the relay-protection tester pick-up unit of total percent harmonic distortion, response speed and synchronism of combined-voltage, electric current and frequency, phase place, time and alternating-current voltage source, the ac current source output amplitude of relay-protection tester.

Background technology

Along with developing rapidly of China's power industry, unit capacity is increasing, and the line voltage grade is more and more higher, and it is huge day by day to send out the power transmission network scale, and safety in production has also been proposed more and more higher requirement.Because protective relaying device is a very important ingredient in the electrical network; it is showing effect difficult to the appraisal aspect protection power system security, the reliability service day by day; best detection means is to adopt relay-protection tester that it is detected at present, and is not only convenient but also accurate.

Yet, intactly detect the relay-protection tester project and have certain degree of difficulty because the detection of relay-protection tester relates to multi-specialized fields such as relay protection, electrical measurement metering, time measurement.Domestic verification to relay-protection tester at present mainly is combined-voltage, electric current and frequency, the phase place accuracy of adopting a plurality of high precision multimeter test relay-protection testers, complex steps and can't detect relay-protection tester alternating-current voltage source, total percent harmonic distortion of ac current source output amplitude, response speed, the synchronism of ac current source and alternating-current voltage source, the carrying load ability of the auxiliary DC power supply of test unit; And on the other hand because the existing time calibration equipments of problem such as driving force can't detect the response speed and the actuation time of Most protection tester; have plenty of with oscillograph at present and detect; what have detects with millisecond meter, and it is bigger to detect error, and accuracy is difficult to guarantee.Domestic still do not have at present a product that can detect combined-voltage, electric current and frequency, phase place, the time accuracy of relay-protection tester and can accurately detect above-mentioned parameter again.

The utility model content

The purpose of this utility model is: overcome the above-mentioned defective of prior art; a kind of pick-up unit of relay-protection tester is provided; this pick-up unit not only can be realized the high-acruracy survey to the high-acruracy survey of relay-protection tester combined-voltage, current parameters and alternating voltage, current phase; and can realize relay-protection tester is measured actuation time, can total percent harmonic distortion, response speed and the synchronism of relay-protection tester alternating-current voltage source, ac current source output amplitude be detected in addition.

The utility model is realized by following scheme: comprise signal sample circuit, A/D change-over circuit, dsp processor, photoelectric isolating circuit, colour liquid crystal display device, keyboard, signal sample circuit output links to each other with the A/D change-over circuit, the A/D change-over circuit links to each other with dsp processor, and it is responsible for signals sampling, processing; Dsp processor, it is responsible for, and signals sampling, processing and calculating TFT color LCD show and keyboard is handled; Photoelectric isolating circuit links to each other with dsp processor, and it is responsible under the situation that electricity is isolated, and is that media transmits signal with light, and the input and output circuit is isolated.

Signal sample circuit described in the utility model comprises that current transformer, voltage transformer (VT), direct current sample circuit, three signal conditioning circuits reach two four and select an analog switch.The A/D change-over circuit comprises 16 A/D converters of 6 passages, alternating current, the voltage of relay-protection tester output link to each other with current transformer, voltage transformer (VT), DC current, the voltage of relay-protection tester output link to each other with the direct current sample circuit, then select an analog switch to link to each other through corresponding signal conditioning circuit and two four respectively, realization is to combined-voltage, current sampling and deliver to signal conditioning circuit and two four select an analog switch to handle; Two four signals that select an analog switch to export are sent into A/D converter and are carried out the A/D conversion, and A/D converter links to each other with dsp processor, and the A/D switching signal is sent into dsp processor I/O mouth data bus.

Described in the utility model pair four is selected an analog switch is ADG201, and A/D converter is AD976.Dsp processor is low-power consumption DSP microprocessor TMS320F2812.Photoelectric isolating circuit is high-speed photoelectric coupler optocoupler 6N137.

The utility model possesses following advantage:

1, the utility model overcomes combined-voltage, electric current and frequency, the phase place accuracy that prior art need adopt a plurality of high precision multimeter test relay-protection testers; complex steps and can't detect relay-protection tester alternating-current voltage source, total percent harmonic distortion of ac current source output amplitude, response speed; the synchronism of ac current source and alternating-current voltage source, the carrying load ability of the auxiliary DC power supply of test unit and response speed and actuation time.

The utility model not only can be realized the high-acruracy survey (0.05 °) to the high-acruracy survey of relay-protection tester combined-voltage, current parameters (0.05 grade) and alternating voltage, current phase; and can realize relay-protection tester is measured actuation time; can total percent harmonic distortion, response speed and the synchronism of relay-protection tester alternating-current voltage source, ac current source output amplitude be detected in addition, technical indicator satisfies the DL/T624-1997 " requirement of relay protection microcomputer type test unit technical conditions.

2, the utility model adopts multi-disc high-speed a/d circulating sampling technology to improve signals collecting speed.

3, the utility model adopts photoelectric isolating circuit that the input and output circuit is isolated, and suppresses system noise, eliminates the interference of ground loop, improves response speed.

4, the utility model adopts dsp processor to be responsible for signals sampling, signal Processing and calculating etc., adopts 8.4 inches TFT color LCDs to show and the keyboard processing, has the Hanzify man-machine interface that writing is clear, contain much information, and is easy to use.

Description of drawings

Fig. 1 is the utility model embodiment circuit diagram;

Fig. 2 selects an analog switch connecting circuit figure for the signal sample circuit signal conditioning circuit with two four;

Fig. 3 be the A/D change-over circuit and with the connection layout of dsp processor;

Fig. 4 be dsp processor and with the connection layout of photoelectric isolating circuit, LCD, keyboard;

Fig. 5 be photoelectric isolating circuit and with the connection layout of dsp processor.

Embodiment

Below in conjunction with embodiment and contrast accompanying drawing the utility model is elaborated.

Referring to accompanying drawing 1, present embodiment is made of signal sample circuit, A/D change-over circuit, dsp processor (10), photoisolator (13), colour liquid crystal display device (11) and keyboard (12).Signal sample circuit comprises that current transformer (1), voltage transformer (VT) (2), direct current sample circuit (3), signal conditioning circuit (4) (5) (6) and two four select an analog switch (7).The A/D change-over circuit is 16 A/D converters of 6 passages (8), (9).Alternating current, the voltage of relay-protection tester output link to each other with current transformer (1), voltage transformer (VT) (2); DC current, the voltage of relay-protection tester output link to each other with direct current sample circuit (3); and after signal conditioning circuit (4) (5) (6) selects an analog switch (7) to link to each other with two four, realization is to combined-voltage, current sampling and deliver to signal conditioning circuit and two four select an analog switch (7) to handle.Two four signals that select an analog switch (7) to export are sent into A/D converter (8), (9) carry out the A/D conversion, and A/D converter (8), (9) link to each other with dsp processor (10), and the A/D switching signal is sent into dsp processor I/O mouth data bus.Photoelectric isolating circuit (13) links to each other with dsp processor (10), open into the amount signal and send into the processing of dsp processor (10) I/O mouth through photoelectric isolating circuit (13), it is responsible under the situation that electricity is isolated, and is that coal Jie transmits signal with light, and the input and output circuit is isolated; Dsp processor (10) I/O mouth links to each other with colour liquid crystal display device (11) and keyboard (12), is responsible for signals sampling, data processing and calculating, shows and the keyboard processing.

It is that to select an analog switch ADG201, A/D sampling A AD976, photoelectric isolating circuit be high-speed photoelectric coupler (optocoupler) 6N137 to low-power consumption DSP microprocessor (TMS320F2812), two four that 8.4 inches TFT colour liquid crystal display devices, dsp processor are adopted in this enforcement.

Concrete annexation is:

Signal is sent into signal conditioning circuit (4) (5) (6) and is carried out filtering behind current transformer (1), voltage transformer (VT) (2), direct current sample circuit (3), output 6 pin of signal conditioning circuit (4) (5) (6) and two four select the S of an analog switch (7) ADG201 1(3 pin), S 2(14 pin), S 3(6 pin), S 4(11 pin) connects, the D of ADG201 1(2 pin), D 2(15 pin), D 3(10 pin), D 4(7 pin) also meets the 1N of ADG201 21N 11N 31N 4Be connected with dsp processor (10) I/O mouth (TMS320F2812).The D of A/D converter (8), (9) A/D976 0~D 15With dsp processor (10) D (TMS320F2812) 0~D 15Connect, 14,23,25 pin of A/D976 also connect with ground, are connected in series electric capacity, 5 pin ground connection between 4 pin and 5 pin.The D of dsp processor (10) TMS320F2812 0~D 7The D of colour liquid crystal display device (11) 0~D 7Connect, the I/O mouth 30,33,36,39,54 of dsp processor (10) TMS320F2812 and colour liquid crystal display device (11) /RD ,/WR ,/CS, A 0, A 1Connect.The I/O mouth 21,24,27 of dsp processor (10) TMS320F2812 is connected with 25,26,27 pin of keyboard (12).The I/O mouth 147 of dsp processor (10) TMS320F2812 is connected with output 6 pin of photoelectric isolating circuit (13) 6N137, is connected in series a resistance between 8 pin of photoelectric isolating circuit (13) 6N137 and 6 pin, string one electric capacity between 8 pin and the ground.

Principle of work of the present utility model is: alternating voltage, current signal are sent into signal conditioning circuit through voltage current transformer, DC voltage, current signal are sent into signal conditioning circuit through the direct current sample circuit, combined-voltage, current signal are sent into two four and are selected an analog switch to select after signal conditioning circuit filtering, by A/D converter the signal that collects is sent into dsp processor again and carry out data processing, calculating, dsp processor also is responsible for 8.4 inches TFT color LCDs demonstrations and keyboard is handled.Photoelectric isolating circuit is isolated the input and output circuit, suppresses system noise, eliminates the interference of ground loop, improves response speed.

Claims (5)

1. relay-protection tester pick-up unit, it is characterized in that: comprise signal sample circuit, A/D change-over circuit, dsp processor, photoelectric isolating circuit, colour liquid crystal display device, keyboard, signal sample circuit output links to each other with the A/D change-over circuit, the A/D change-over circuit links to each other with dsp processor, and it is responsible for signals sampling, processing; Dsp processor, it is responsible for, and signals sampling, processing and calculating TFT color LCD show and keyboard is handled; Photoelectric isolating circuit links to each other with dsp processor, and it is responsible under the situation that electricity is isolated, and is that media transmits signal with light, and the input and output circuit is isolated.
2. relay-protection tester pick-up unit according to claim 1, it is characterized in that: signal sample circuit comprises current transformer (1), voltage transformer (VT) (2), direct current sample circuit (3), signal conditioning circuit (4) (5) (6) and two four selects an analog switch (7), the A/D change-over circuit comprises 16 A/D converters of 6 passages (8), (9), the alternating current of relay-protection tester output, voltage and current transformer (1), voltage transformer (VT) (2) links to each other, the DC current of relay-protection tester output, voltage links to each other with direct current sample circuit (3), and after signal conditioning circuit (4) (5) (6) selects an analog switch (7) to link to each other with two four, realize combined-voltage, current sampling is also delivered to signal conditioning circuit and is selected an analog switch (7) to handle with two four; Two four signals that select an analog switch (7) to export are sent into A/D converter (8), (9) carry out the A/D conversion, and A/D converter (8), (9) link to each other with dsp processor (10), and the A/D switching signal is sent into dsp processor I/O mouth data bus.
3. relay-protection tester pick-up unit according to claim 1 and 2 is characterized in that: two four to select an analog switch be ADG201, and the A/D sampling A is AD976.
4. relay-protection tester pick-up unit according to claim 1 is characterized in that: dsp processor is low-power consumption DSP microprocessor TMS320F2812.
5. relay-protection tester pick-up unit according to claim 1 is characterized in that: photoelectric isolating circuit is high-speed photoelectric coupler optocoupler 6N137.
CN2009202417610U 2009-12-15 2009-12-15 Detection device of relay protection testing device CN201589855U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009202417610U CN201589855U (en) 2009-12-15 2009-12-15 Detection device of relay protection testing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009202417610U CN201589855U (en) 2009-12-15 2009-12-15 Detection device of relay protection testing device

Publications (1)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102243484A (en) * 2011-04-01 2011-11-16 成都振中电气有限公司 Intelligent protective relaying device
CN102393492A (en) * 2011-07-05 2012-03-28 中北大学 Full-automatic mining comprehensive protector testing system
CN102590776A (en) * 2012-02-02 2012-07-18 高鹤 Handheld intelligent signal generator
CN103033743A (en) * 2012-12-08 2013-04-10 青岛大学 Measuring device of actuation time of switching element
CN103823199A (en) * 2014-03-03 2014-05-28 国家电网公司 Automatic detection system and detection method for intelligent substation relay protection testing device
CN104267366A (en) * 2014-10-13 2015-01-07 国家电网公司 Automatic relay protection testing device output alternating voltage response speed measuring method
CN105676043A (en) * 2016-03-31 2016-06-15 杭州威锐孚源科技有限公司 Intelligent electric parameter tester and control method thereof
CN108226841A (en) * 2017-12-29 2018-06-29 河南北瑞电子科技有限公司 A kind of relay-protection tester signal pickup assembly
TWI670504B (en) * 2018-05-30 2019-09-01 日商三菱電機股份有限公司 Characteristic test system of protective relay device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102243484A (en) * 2011-04-01 2011-11-16 成都振中电气有限公司 Intelligent protective relaying device
CN102393492A (en) * 2011-07-05 2012-03-28 中北大学 Full-automatic mining comprehensive protector testing system
CN102393492B (en) * 2011-07-05 2014-04-16 中北大学 Full-automatic mining comprehensive protector testing system
CN102590776A (en) * 2012-02-02 2012-07-18 高鹤 Handheld intelligent signal generator
CN103033743A (en) * 2012-12-08 2013-04-10 青岛大学 Measuring device of actuation time of switching element
CN103823199A (en) * 2014-03-03 2014-05-28 国家电网公司 Automatic detection system and detection method for intelligent substation relay protection testing device
CN104267366A (en) * 2014-10-13 2015-01-07 国家电网公司 Automatic relay protection testing device output alternating voltage response speed measuring method
CN105676043A (en) * 2016-03-31 2016-06-15 杭州威锐孚源科技有限公司 Intelligent electric parameter tester and control method thereof
CN108226841A (en) * 2017-12-29 2018-06-29 河南北瑞电子科技有限公司 A kind of relay-protection tester signal pickup assembly
TWI670504B (en) * 2018-05-30 2019-09-01 日商三菱電機股份有限公司 Characteristic test system of protective relay device

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GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20100922

Termination date: 20121215