CN105116224A - Novel auxiliary line parameter testing tool and method - Google Patents

Abstract

The present invention relates to a new type of line parameter test auxiliary tool device and method. The technical solution is: the present invention includes a test box, a knife switch is provided on the top of the test box, and three-phase short circuits are respectively provided on both sides of the knife switch. connector and a three-phase short-circuit grounding joint, a three-phase knife switch is provided on the test box, and the three-phase knife switch is connected to a three-phase grounding rod through a three-phase test line, and the three-phase grounding rod includes a phase A grounding rod, Phase B ground rod, C phase ground rod, A phase ground rod, B phase ground rod and C phase ground rod are composed of epoxy resin hanging rod and ground rod joint, and the ground rod joint is connected with three-phase test line The beneficial effect of the present invention is: the free switch between the three states of the knife switch is used to replace the switching operation and the replacement of the short line, which saves the steps of cooperation of the operating personnel.

Description

Novel Line Parameter Test Auxiliary Tool Device and Method

technical field

The invention relates to a line parameter test device, in particular to a novel line parameter test auxiliary tool device and method.

Background technique

At present, before putting into operation newly erected or modified 220kV and above high-voltage transmission lines, in addition to checking the line insulation and checking the phase, it is also necessary to provide accurate and reliable line power frequency parameter values measured on site as a basis for calculating the short-circuit current of the system. The practical basis for electric protection setting, calculation of power flow distribution and selection of reasonable operation mode. The power frequency parameters of overhead lines mainly test insulation resistance (including line nuclear phase), DC resistance, positive sequence impedance, zero sequence impedance, positive sequence capacitance, and zero sequence capacitance. Line parameter testing The test process is complicated and there are many steps. It is necessary for the test personnel to perform operations such as hanging wires and shorting the line at both ends of the line. This has brought a lot of repetitive troubles to operators and testers.

Contents of the invention

The object of the present invention is to provide a novel circuit parameter testing auxiliary tool device and method for the above-mentioned defects in the prior art.

Its technical solution is: the present invention includes a test box body, a knife switch is provided on the top of the test box body, a three-phase short-circuit joint and a three-phase short-circuit ground joint are respectively provided on both sides of the knife switch, and three-phase short-circuit ground joints are provided on the test box body. Phase knife switch, the three-phase knife switch is connected to the three-phase grounding rod through the three-phase test line, the three-phase grounding rod includes A phase grounding rod, B phase grounding rod, C phase grounding rod, A phase The ground rod, phase B ground rod, and phase C ground rod are composed of epoxy resin hanging rods and ground rod connectors, and the ground rod connectors are connected to the three-phase test line.

The above-mentioned epoxy resin hooking rod is a telescopic rod.

A testing method for a novel line parameter testing auxiliary tool device, comprising the following steps:

A) The three-phase grounding rod adopts the grounding rod joint and the epoxy resin hanging rod, the epoxy resin hanging rod is used as the connection part with the line wire, and the connection between the grounding rod joint and the main body of the three-phase knife switch adopts a 16 square millimeter personal security wire , the main material of the three-phase knife switch device is a box-type structure of epoxy resin material, and the operating part adopts an open portable device;

B) Process the copper bar to make a three-phase knife switch, and use the copper bar to set up a three-phase short-circuit joint and a three-phase short-circuit grounding joint on both sides of the knife switch. Use 25 square millimeters of soft copper wire to connect the three-phase knife switch from The interior of the box is respectively led to the side of the box;

C) During the test, clamp the grounding rod joints of the three-phase grounding rods to the corresponding line conductors respectively, and the tested line is introduced into the knife switch in three phases through the lead wires. When the knife switch is placed in the middle position, the line is in a three-phase open circuit state; when the knife switch is on the three-phase short-circuit side, the line is in the three-phase short-circuit state; when the knife switch is on the three-phase short-circuit and grounding side, the line is in the three-phase short-circuit grounding state, and the knife switch can freely switch among the three states It replaces the switching operation and replaces the short wiring, which saves the steps of cooperation of the operating personnel and completes the test.

The beneficial effects of the present invention are: the test procedure of the line parameter test is simple, the steps are few, and it is not necessary for the test personnel to carry out operations such as hanging wires and line short-circuits at both ends of the line. The free switching of the knife switch among the three states replaces the switching operation and the replacement of the short wiring, which saves the steps of cooperation of the operating personnel.

Description of drawings

Accompanying drawing 1 is a structural representation of the present invention;

Accompanying drawing 2 is the structural representation of phase A ground rod;

In the above picture: test box 1, knife switch 2, three-phase short-circuit joint 3, three-phase short-circuit ground joint 4, three-phase knife switch 5, three-phase test line 6, A-phase ground rod 7, B-phase ground Rod 8 and phase C ground rod 9.

Detailed ways

In conjunction with accompanying drawing 1-2, the present invention is further described:

The present invention comprises a test box 1, the top of the test box 1 is provided with a knife switch 2, and the two sides of the knife switch 2 are respectively provided with a three-phase short-circuit joint 3 and a three-phase short-circuit ground joint 4, on the test box 1 A three-phase knife switch 5 is provided, and the three-phase knife switch 5 is connected to a three-phase grounding rod through a three-phase test line 6. The three-phase grounding rod includes a phase A grounding rod 7, a B-phase grounding rod 8, and a phase C grounding rod. The grounding rod 9, the A-phase grounding rod 7, the B-phase grounding rod 8 and the C-phase grounding rod 9 are composed of epoxy resin hanging rods and grounding rod joints, and the grounding rod joints are connected with three-phase test lines.

Among them, the epoxy resin hooking rod is a telescopic rod, and the telescopic rod can freely adjust the telescopic length to realize the convenience of the test.

The testing method of a kind of novel circuit parameter test auxiliary tool device mentioned in the present invention, comprises the following steps:

A) The three-phase grounding rod adopts the grounding rod joint and the epoxy resin hanging rod, the epoxy resin hanging rod is used as the connection part with the line wire, and the connection between the grounding rod joint and the main body of the three-phase knife switch adopts a 16 square millimeter personal security wire , the main material of the three-phase knife switch device is a box-type structure of epoxy resin material, and the operating part adopts an open portable device;

B) Process the copper bar to make a three-phase knife switch, and use the copper bar to set up a three-phase short-circuit joint and a three-phase short-circuit grounding joint on both sides of the knife switch. Use 25 square millimeters of soft copper wire to connect the three-phase knife switch from The interior of the box is respectively led to the side of the box;

C) When conducting the test, clamp the grounding rod joint b of the three-phase grounding rod to the corresponding line wires respectively, and the tested line is introduced into the knife switch in three phases through the lead wire. When the knife switch is placed in the middle position, the line is in three-phase Open circuit state; when the knife switch is on the three-phase short-circuit side, the line is in the three-phase short-circuit state; Switch to replace the switching operation and replace the short wiring, which saves the steps of cooperation of the operating personnel and completes the test.

The beneficial effects of the present invention are: the test procedure of the line parameter test is simple, the steps are few, and it is not necessary for the test personnel to carry out operations such as hanging wires and line short-circuits at both ends of the line. The free switching of the knife switch among the three states replaces the switching operation and the replacement of the short wiring, which saves the steps of cooperation of the operating personnel.

The above descriptions are only some of the preferred embodiments of the present invention, and any person skilled in the art may modify the technical solutions described above or modify them into equivalent technical solutions. Therefore, any simple modification or equivalent replacement made according to the technical solution of the present invention falls within the protection scope of the present invention.

Claims (3)

1. a Novel line parameter testing auxiliary tool device, it is characterized in that: comprise test casing (1), the top of test casing (1) is provided with disconnecting link (2), the both sides of described disconnecting link (2) are respectively equipped with three-phase short circuit joint (3) and three-phase shortcircuit ground joint (4), test casing (1) is provided with three-phase disconnecting link (5), three-phase disconnecting link (5) connects three-phase ground bar by three-phase p-wire (6), described three-phase ground bar comprises A phase ground rod (7), B phase ground rod (8), C phase ground rod (9), A phase ground rod (7), B phase ground rod (8) and C phase ground rod (9) mount bar (a) by epoxy resin and ground rod joint (b) forms, ground rod joint (b) connects three-phase p-wire (6).

2. a kind of Novel line parameter testing auxiliary tool device according to claim 1, is characterized in that: described epoxy resin mounting bar (a) is expansion link.

3. the method for testing of a kind of Novel line parameter testing auxiliary tool device according to claim 1 and 2, is characterized in that, comprise the following steps:

A) three-phase ground bar adopts ground rod joint and epoxy resin mounting bar, epoxy resin mounting bar as with line wire coupling part, the connection of ground rod joint and three-phase disconnecting link main body adopts 16 square millimeters of individual safety wires, the material of main part of three-phase disconnecting link device is the case structure of epoxide resin material, and operation part adopts the hand held device of open type;

B) copper bar is processed, make three-phase disconnecting link (5), be respectively equipped with three-phase shortcircuit joint, three-phase shortcircuit ground joint with copper bar in three-phase disconnecting link (5) both sides, adopt the annealed copper wire of 25 square millimeters, three-phase disconnecting link (5) is drawn out to body side respectively from test casing (1) inside;

C) when testing, ground rod joint (b) of three-phase ground bar is clamped corresponding line wire respectively, test line is through lead-in wire, and point three-phase introduces disconnecting link, and when disconnecting link is placed in centre position, circuit is in three-phase open-circuit condition; When disconnecting link is in three-phase short circuit side, circuit is in three-phase shortcircuit state; Disconnecting link be in three-phase shortcircuit and ground connection side time, circuit is in three-phase shortcircuit ground connection, by disconnecting link freely switching between three kinds of states replace grid switching operation and change shorting stub, eliminate operations staff coordinate step, complete test.