CN102590603A - Through flow sampling method of check protection device - Google Patents

Abstract

Translated fromChinese

本发明公开了一种检验保护装置通流采样方法，属通流采样方法。使用的仪器为继电保护测试仪和拓展口；通流采样方法为：一)确定继电保护试验对象，按需要选取待测的交流电流路数，根据各路电流的比例确定每路通入电流值并计算需要通入的总电流值；二)将继电保护测试仪与扩展口连接，待测装置通道与扩展口的输出端口连接，构成闭环通路，三)利用继电保护测试仪通入算好的总电流，通过扩展口分成不同的多路电流进入保护装置中；四)观察保护装置的采样数据，实验结束。有益效果是：解决了变电检修继电保护多路通流采样试验繁琐，周期长的难题。省时省力、高效准确完成多路通流采样试验，避免了频繁的拔插试验线对端子排的损害，大大提高试验效率。

The invention discloses a through-flow sampling method for an inspection and protection device, which belongs to a through-flow sampling method. The instrument used is a relay protection tester and an expansion port; the current sampling method is as follows: 1) Determine the test object of relay protection, select the number of AC current circuits to be tested according to the needs, and determine the current ratio of each channel according to the current ratio of each channel. current value and calculate the total current value that needs to be connected; 2) connect the relay protection tester to the expansion port, and connect the channel of the device under test to the output port of the expansion port to form a closed-loop path; 3) use the relay protection tester to communicate The calculated total current is divided into different multi-channel currents through the expansion port and enters the protection device; 4) observe the sampling data of the protection device, and the experiment is over. The beneficial effect is that: the problem of cumbersome and long period for multi-channel current sampling test of substation maintenance relay protection is solved. It saves time and effort, efficiently and accurately completes the multi-channel flow sampling test, avoids the damage to the terminal block caused by frequent plugging and unplugging test lines, and greatly improves the test efficiency.

Description

The through-flow method of sampling of check protection device

Affiliated technical field

The present invention relates to a kind of through-flow method of sampling, specifically is the through-flow method of sampling of a kind of check protection device, is mainly used in the through-flow sampling test of relay-protection tester substation equipment maintenance and repair protective relaying device multichannel.

Background technology

Through-flow sampling is the verification work whether the check protection device can correctly adopt required current value, be that relay protection and secondary device can safe and stable operations the basis.Because existing relay-protection tester all has only A, B, three electric current delivery outlets of C, the traditional sampling method can only one the tunnel one the tunnel does through-flow sampling.If do the through-flow sampling of 10 road three-phases experiment, need that a people is through-flow, people's thread-changing, people's finder sampled result, need 3 people to accomplish at least; Also possibly move tester midway, test period is longer.The frequent like this plug not only damage ratio to terminal is bigger, and the waste on life period and the manpower, and work efficiency is lower.

Summary of the invention

For solving the problems of the technologies described above, the present invention provides a kind of check protection device the through-flow method of sampling.

The present invention realizes with following technical scheme: the through-flow method of sampling of a kind of check protection device comprises the instrument and the through-flow method of sampling of use;

The instrument that uses is: relay-protection tester and expansion mouth; Expand mouth and comprise current input terminal and current output terminal; At A, B, C three-phase current input end respectively with the ac current source demultiplexing; On each divided circuit, connect a toggle switch, respectively be provided with a test socket, between each toggle switch and the test socket corresponding, connect a divided circuit resistance respectively with it at A, B, corresponding each divided circuit of C three-phase current output terminal.The ratio of said No. 10 divided circuit resistance is: 1: 2: 3: 4: 5: 6: 7: 8: 9: 10; The ratio of divided circuit electric current is: 1: 1/2: 1/3: 1/4: 1/5: 1/6: 1/7: 1/8: 1/9: 1/10;

The through-flow method of sampling is:

One) confirms the reaying protection test object, choose alternating current way to be measured on demand, confirm that according to the ratio of each road electric current every road feeds current value and calculates the total current value that needs feed;

Two) carry out the site safety measure after, relay-protection tester mouthful is connected with expansion, the output port of device passage to be measured and expansion mouthful is connected, the formation closed-loop path, preparation begins to test;

Three) utilize relay-protection tester to feed good total current, be divided into different multichannel electric currents through the expansion mouth and get in the protective device;

Four) sampled data of observing protector, experiment finishes.

The invention has the beneficial effects as follows: it is loaded down with trivial details to have solved the through-flow sampling of substation equipment maintenance and repair relay protection multichannel test, the difficult problem that the cycle is long.Time saving and energy saving, efficiently and accurately is reliably accomplished the through-flow sampling of multichannel test (can export simultaneously at most 30 tunnel different definite value alternating current), has avoided the infringement to terminal row of frequent plug test wire again, improves test efficiency greatly.

Description of drawings

Fig. 1 expands a mouthful outward appearance vertical view;

Fig. 2 expands a mouthful electrical schematic diagram.

Among the figure: 1, current input terminal, 2, current output terminal, 3, toggle switch, 4, divided circuit resistance, 5, the test socket.

Embodiment

Below in conjunction with accompanying drawing and embodiment the present invention is further specified.

As depicted in figs. 1 and 2; Expanding mouth is that A, B, C three-phase current input end 1 are divided into 10 the tunnel with ac current source respectively; On each divided circuit, connect atoggle switch 3; Respectively be provided with atest socket 5 at A, B, C three-phasecurrent output terminal 2 corresponding each divided circuit, between eachtoggle switch 3 and the test socket corresponding, connect a divided circuit resistance 4 respectively with it.Divided circuit≤10 tunnel of A, B, C three-phase current input end, and be no more than 10 the tunnel at most.The ratio of No. 10 divided circuit resistance is: 1: 2: 3: 4: 5: 6: 7: 8: 9: 10; Present embodiment No. 10 divided circuit resistance are respectively: 1 Ω, 2 Ω, 3 Ω, 4 Ω, 5 Ω, 6 Ω, 7 Ω, 8 Ω, 9 Ω, 10 Ω.The ratio of divided circuit electric current is: 1: 1/2: 1/3: 1/4: 1/5: 1/6: 1/7: 1/8: 1/9: 1/10.

Method of operating relates to and is:

One) confirms the reaying protection test object, choose alternating current way to be measured on demand, confirm that according to the ratio of each road electric current among Fig. 2 every road feeds current value and calculates the total current value that needs feed;

Two) carry out the site safety measure after, the wiring that can make an experiment mouthful is connected relay-protection tester with expansion, the output port of device passage to be measured and expansion mouthful is connected, the formation closed-loop path, preparation begins to test;

Three) utilize relay-protection tester to feed good total current, be divided into different multichannel electric currents through the expansion mouth and get in the protective device;

Four) sampled data of observing protector, experiment finishes.

Claims (1)

Translated fromChinese

1.一种检验保护装置通流采样方法，其特征在于：包括使用的仪器和通流采样方法；1. A through-flow sampling method for an inspection and protection device, characterized in that: it includes the instrument used and the through-flow sampling method;使用的仪器为：继电保护测试仪和拓展口，拓展口包括电流输入端和电流输出端，在A、B、C三相电流输入端分别将交流电流源分成多路，在每个分流电路上连接一个钮子开关，在A、B、C三相电流输出端对应每个分流电路各设置有一个试验插口，在每个钮子开关和与其对应的试验插口之间分别连接一个分流电路电阻。所述10路分流电路电阻之比为：1∶2∶3∶4∶5∶6∶7∶8∶9∶10；分流电路电流之比为：1∶1/2∶1/3∶1/4∶1/5∶1/6∶1/7∶1/8∶1/9∶1/10；The instruments used are: relay protection tester and expansion port. The expansion port includes current input terminal and current output terminal. The AC current source is divided into multiple channels at the three-phase current input terminals of A, B and C respectively. In each shunt circuit Connect a toggle switch to the top, and a test socket is provided for each shunt circuit at the A, B, and C three-phase current output terminals, and a shunt circuit resistor is connected between each toggle switch and its corresponding test socket. . The ratio of the resistance of the 10-way shunt circuit is: 1:2:3:4:5:6:7:8:9:10; the ratio of the current of the shunt circuit is: 1:1/2:1/3:1/ 4:1/5:1/6:1/7:1/8:1/9:1/10;通流采样方法为：The through-flow sampling method is:一)确定继电保护试验对象，按需要选取待测的交流电流路数，根据各路电流的比例确定每路通入电流值并计算需要通入的总电流值；1) Determine the relay protection test object, select the number of AC current circuits to be tested according to the needs, determine the current value of each circuit according to the current ratio of each circuit, and calculate the total current value that needs to be connected;二)做好现场安全措施后，将继电保护测试仪与扩展口连接，待测装置通道与扩展口的输出端口连接，构成闭环通路，准备开始试验；2) After the on-site safety measures are taken, connect the relay protection tester to the expansion port, and connect the channel of the device to be tested to the output port of the expansion port to form a closed-loop path, ready to start the test;三)利用继电保护测试仪通入算好的总电流，通过扩展口分成不同的多路电流进入保护装置中；3) Use the relay protection tester to pass in the calculated total current, and divide it into different multi-channel currents through the expansion port to enter the protection device;四)观察保护装置的采样数据，实验结束。4) Observe the sampling data of the protection device, and the experiment ends.

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