CN203191414U - Connection mode converter for transmission line parameter test - Google Patents

Abstract

The utility model discloses a wiring mode converter for parameter testing of transmission lines, which comprises three input terminals, three output terminals, a grounding terminal, an insulating panel and a transfer switch; the three input terminals, three output terminals, the grounding The terminals are arranged on the insulating panel; one end of the transfer switch is connected to the three output terminals to connect the transmission line, and the other end is connected to the input terminal to form a connection line for the parameter to be tested according to the test requirements, or connected to the ground terminal to form a ground connection. circuit; the transfer switch is provided with a handle. The wiring mode converter for the transmission line parameter test has a simple operation method, and the line required for the test can be accurately connected by simply turning the handle, and the positive sequence parameters and zero sequence parameters of the high voltage transmission line can be quickly measured. It not only ensures the safety of the test, but also makes the operation simple and reliable, and improves the work efficiency.

Description

Wiring Mode Converter for Transmission Line Parameter Test

technical field

The utility model relates to an electric power system testing device, in particular to a connection mode converter for parameter testing of transmission lines.

Background technique

Before the newly built and rebuilt high-voltage transmission lines are put into operation, various power frequency parameters need to be tested, among which the most commonly tested are positive sequence parameters and zero sequence parameters, which are used for calculating system short-circuit current, relay protection setting, calculating power flow distribution and The actual basis for choosing a reasonable operation mode and other work. At present, the high-voltage line parameter testing method mainly uses a special high-voltage line parameter tester in the substation at the head end of the line, and at the same time, the substation at the end of the line has staff to cooperate with each other. According to different test items, it is necessary to switch the wiring mode of the high-voltage line parameter tester. When there is an induced voltage on the tested line, it will bring great safety hazards to the testers. The existing test lead wiring methods and devices all need to rely on the switch operation of multiple knife switches to realize the conversion of the wiring mode. The process is cumbersome and prone to misoperation.

Contents of the invention

In order to solve the above technical problems, the utility model provides a wiring mode converter for parameter testing of transmission lines, which can accurately connect the required lines for testing by simply turning the handle, and can quickly measure the positive sequence parameters and parameters of high-voltage transmission lines. Zero sequence parameters.

For this reason, the technical scheme of the utility model is as follows:

A wiring mode converter for transmission line parameter testing, including three input terminals, three output terminals, grounding terminals, an insulating panel and a changeover switch; the three input terminals, three output terminals, and grounding terminals are all arranged On the panel; one end of the changeover switch is connected to the three output terminals to connect the power transmission line, and the other end is connected to the input terminal according to the test requirements to form a connection line for the parameter to be measured, or connected to the ground terminal to form a ground circuit; The transfer switch is provided with a handle.

The parameters to be measured refer to positive sequence parameters or zero sequence parameters.

The handle can drive the transfer switch to respectively connect the positive sequence parameter, zero sequence parameter test circuit or the ground circuit, and the handle is installed on the insulating panel.

The wiring mode converter for the transmission line parameter test has a simple operation method, and the line required for the test can be accurately connected by simply turning the handle, and the positive sequence parameters and zero sequence parameters of the high voltage transmission line can be quickly measured. It not only ensures the safety of the test, but also makes the operation simple and reliable, and improves the work efficiency.

Description of drawings

Fig. 1 is the structural representation of the wiring mode converter of the utility model transmission line parameter test;

Fig. 2 is a schematic diagram of the internal structure of the wiring mode converter for the transmission line parameter test of the utility model.

In the figure: 1-input terminal; 2-output terminal; 3-grounding terminal; 4-insulation panel; 5-handle; 6-transfer switch; 7-transmission line; 8-line parameter tester.

Detailed ways

The structure of the wiring mode converter for transmission line parameter testing of the utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Fig. 1 and Fig. 2, the wiring mode converter of the transmission line parameter test disclosed by the utility model includes three input terminals 1, three output terminals 2, a ground terminal 3, an insulating panel 4 and a transfer switch 6; There are three input terminals 1, three output terminals 2 and a grounding terminal 3, and the grounding terminal 3 is grounded; one end of the transfer switch 6 is connected to the three output terminals 2, and the output terminal 2 is connected to the transmission line 7 to connect the transmission line The other end of the transfer switch is connected with the input terminal 1 according to the test requirements to form a connection circuit for the parameter to be tested, or connected with the ground terminal 3 to form a ground circuit; the transfer switch 6 is provided with a handle 5 .

The parameters to be measured refer to positive sequence parameters or zero sequence parameters.

The handle 5 can drive the transfer switch 6 to respectively connect the positive sequence parameter, zero sequence parameter test circuit or the ground circuit, and the handle 5 is installed on the insulating panel 4 .

The method of using the wiring mode converter for this transmission line parameter test is as follows:

1) Ground the ground terminal 3;

2) Turn the handle 5 to drive the transfer switch 6 to connect the grounding connection line, so that the equipment is grounded;

3) Connect the input terminal 1 with the line parameter tester 8, and connect the output terminal 2 with the transmission line 7;

4) Turn the handle 5 to drive the transfer switch 6 to connect the positive sequence parameter connection line, and test the positive sequence parameter of the transmission line;

5) Turn the handle 5 to drive the transfer switch 6 to connect the grounding connection line, release the residual charge of the line, and prevent the operator from getting an electric shock;

6) Rotate the handle 5 to drive the changeover switch 6 to connect the zero-sequence parameter connection line to test the zero-sequence parameter of the transmission line;

7) Turn the handle 5 to drive the changeover switch 6 to connect the ground connection line, and release the residual charge of the line;

8) After the test is completed, keep the transfer switch 6 connected to the ground connection line, first remove the connection between the input terminal 1 and the line parameter tester 8, then remove the connection between the output terminal 2 and the transmission line 7, and finally remove The connection between the ground terminal 3 and the ground.

The wiring mode converter for the transmission line parameter test has a simple operation method, and the line required for the test can be accurately connected by simply turning the handle, and the positive sequence parameters and zero sequence parameters of the high voltage transmission line can be quickly measured. It not only ensures the safety of the test, but also makes the operation simple and reliable, and improves the work efficiency.

Claims (1)

1. the mode of connection converter of a transmission line parameter test is characterized in that: comprise three input terminals (1), three lead-out terminals (2), ground terminal (3), insulating panel (4) and switch (6); Described three input terminals (1), three lead-out terminals (2) and ground terminal (3) all are arranged on the described insulating panel (4); One end of described switch (6) is connected with described three lead-out terminals (2), and the other end need connect and compose parameter connection line to be measured with described input terminal (1) according to test, or connects and composes grounding circuit with described ground terminal (3); Described switch (6) is provided with handle (5).

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