CN202119856U

CN202119856U - Simulation test apparatus for overhead high voltage circuit grounding short circuit fault

Info

Publication number: CN202119856U
Application number: CN201120176400XU
Authority: CN
Inventors: 薛兆春
Original assignee: BEIJING HAORUIDA TECHNOLOGY Co Ltd
Current assignee: BEIJING HAORUIDA TECHNOLOGY Co Ltd
Priority date: 2011-05-30
Filing date: 2011-05-30
Publication date: 2012-01-18
Anticipated expiration: 2021-05-30

Abstract

A simulation test apparatus for overhead high voltage circuit grounding short circuit faults includes a simulation line and a test circuit. The simulation line includes a test cable, and the outer of the insulating layer of the test cable is sleeved with two conductive metal tubes which are isolated mutually. The test circuit includes a current loop, a high voltage loop, a grounding loop and a capacitance current discharge loop. In a test, the required current amplitude and current time-delay control is generated by the current loop to be sent to the simulation line; the required voltage is generated by the high voltage loop to be sent to the simulation line; the required capacitance current is generated by the capacitance current loop; the grounding loop controls the high voltage to be switched to the ground; and the coexisting of a simulation line fault current and a high voltage is realized, which provides great convenience for the departments such as the research and development.

Description

The simulation test device of overhead high voltage line ground short circuit fault

Technical field

The utility model relates to a kind of fault simulation experimental provision of high-tension line, relates in particular to a kind of simulation test device that is used for the ground short circuit fault of overhead high voltage line.

Background technology

The fault of common 10 kilovolts of high-tension lines all is actual track generation in service; Has very high danger because do the actual track site test; Cause greatly harm can for the operation of actual track system; The electric power stipulations force not allow so on-the-spot road test to impact, and are necessary so make an experiment through simulated failure.Simulation test is to change the purpose that reaches product testing through current/voltage in the analog line.Present simulation test, the equipment of employing or product are to export the adjustment that the mode that connects the up-flow coil realizes size of current through pressure regulator mostly, carry out break-make through mechanical contact relay or A.C. contactor.When using this mechanical switch, will inevitably produce mechanical inertia; Be that mechanical switch has certain distance when divide-shut brake, when the combined floodgate separating brake, produce time-delay, deciliter time of mechanical switch does not reach requirement when branch wire time is in 10ms; Realized not quick response; And mechanical switch is tested the back contact easy ageing for a long time, and service time, length also caused the contact adhesion, damaged easily; Make troubles to maintenance maintenance, can't adapt to present needs about 10kv line fault simulation test precision; And present test unit can only detect some electric currents and change, and changes the influence for product and ignored the lead voltage of electric field, can not reach the purpose of compbined test.

The utility model content

The purpose of the utility model is to provide a kind of simulation test device that is used for overhead high voltage line ground short circuit fault, can not only overcome the defective of prior art, and can be used for the test of high-tension line fault detector.

The technical scheme of the utility model is following:

The simulation test device of overhead high voltage line ground short circuit fault; Comprise analog line and hookup; It is characterized in that: said analog line comprises a test cable, and said test cable outside is an insulation course, and inside is cable core; Outside the insulation course of test cable, two sections conductive metal pipes of isolating each other of suit; Said hookup comprises current return, high tension loop, ground loop and capacitance current discharge loop, wherein,

Said current return is through an input end of an output termination current feedback circuit of first pressure regulator; Another output terminal of first pressure regulator then connects another input end of current feedback circuit through the slide-changing resistor device, two output terminals of current feedback circuit connect the core two ends of test cable respectively through switch;

Two output terminals of said high tension loop through second pressure regulator form the loop through two input ends that switch and load lamp connect voltage transformer (VT), and two output terminals of voltage transformer (VT) connect two outer conductive metal pipes of test cable insulation course respectively through switch;

The external 220V civil power of said ground loop; And through switch connect the parallel connection two-supremes crimping tentaculum coil and form the loop; Wherein an end of the high-voltage contact of an end of the high-voltage contact of the first high voltage connector coil and the second high voltage connector coil links together and ground connection, and the two high pressure contact other ends then connect two outer conductive metal pipes of test cable insulation course respectively;

Said capacitance current loop connects the transformer input end through the 3rd output voltage regulator; The transformer output terminal connects serial connection diode, switch and electric capacity successively; Form charge circuit, the both positive and negative polarity of said electric capacity connects the core two ends of said test cable again respectively through switch.

Said current return, high tension loop, ground loop and capacitance current discharge loop can be arranged in the switch board.

Said each switch adopts noncontacting switch, and the control module of each noncontacting switch folding of control is set in said switch board.

The test unit that the utility model provided adopts a lead internal core through electric current, and the external conductive metal tube feeds high pressure; Being implemented on the test circuit existing fault current also has high pressure simultaneously and deposit; Not only saved testing equipment, and, multiple test has been integrated through switch board; Can reach the purpose of compbined test, for departments such as R&D and production provide very big convenience.Adopt noncontacting switch, avoided that mechanical switch can't respond fast, the defective of contact adhesion.

Description of drawings

Fig. 1 is the electrical block diagram of the utility model

Embodiment

Referring to Fig. 1; The simulation test device of the utility model overhead high voltage line ground short circuit fault comprises analog line and hookup, and said analog line comprises a test cable 1; Said test cable outside is an insulation course; Inside is cable core, outside the insulation course of test cable, and two sections conductive metal pipes 2 of isolating each other of suit; Said hookup comprises current return 3, high tension loop 4, ground loop 5 and capacitance current discharge loop 6.(above-mentioned current return 3, high tension loop 4, ground loop 5 and capacitance current discharge loop 6 are shown in respectively in the frame of broken lines among Fig. 1.)

Current return 3 connects slide-changing resistor device R through the output terminal of the first pressure regulator T1 through switch S 1, connects the input end of current feedback circuit T through slide-changing resistor device R; The above-mentioned output terminal of the first pressure regulator T1 also can be connected to the input upper end of current feedback circuit T through the switch S 2 parallelly connected with slide-changing resistor device R; Another input end of another output termination current feedback circuit T of the first pressure regulator T1.Two output terminals of current feedback circuit T connect the core two ends of test cable 1 respectively through switch S 3.Current return 3 can be realized the adjustment of test current through the switching that switch S 1, S2, S3 realize test current through adjusting slide-changing resistor device R.

Two output terminals of high tension loop 4 through the second pressure regulator T2 form the loop through two input ends that switch S 4 and load lamp L meet voltage transformer (VT) T3.As shown in the figure, the output upper end of the second pressure regulator T2 connects switch S 4 inputs, and S4 output connects load lamp L input, and L output is connected to voltage transformer (VT) T3 input upper end; Pressure regulator T2 output lower end connects voltage transformer (VT) T3 input lower end.Voltage transformer (VT) T3 two output terminals connect two outer conductive metal pipes 2 of test cable insulation course respectively through switch S 5.High tension loop 4 is regulated pressure regulator T2 may command high pressure size through second, realizes the switching of test high pressure through switch S 4, S5 control.

Ground loop 5 external 220V civil powers; Meet two-supremes crimping tentaculum coil K1, the K2 of parallel connection through switch S 7, S8, and form control loop, wherein the high-voltage contact of the first high voltage connector coil K1 is K1-1; The high-voltage contact of the second high voltage connector coil K2 is K2-1; The end of K1-1 and the end of K2-1 connect and connect the earth, the conductive metal pipe that the other termination test cable insulation course of K1-1 is outer, other another conductive metal pipe of a termination of K2-1.Ground loop 5 makes its high-voltage contact K1-1, K2-1 carry out high pressure switching over the ground through switch S 7, S8 control high voltage connector coil K1, K2 break-make, reaches the purpose of earth test.

Capacitance current discharge loop 6 adopts the 3rd pressure regulator T4 to export the input that meets transformer T5, the positive pole of terminating diode D in the transformer T5 output, and the negative pole of diode D connects the capacitor C positive pole through switch A1, and the capacitor C negative pole connects T5 output lower end, forms charge circuit.The capacitor C positive pole is connected to switch S 10 through switch S 9 again, and connects an end of the core of test cable 1 through S10; The capacitor C negative pole connects the other end of the core of test cable 1 through switch S 10.Capacitance current discharge loop 6 charges to capacitor C through switch A1, through S9, S10 discharge, through the 3rd pressure regulator T4 regulating capacitor charging height, realizes the adjustment of capacitor discharge electric current.

During the utility model practical implementation, above-mentioned current return 3, high tension loop 4, ground loop 5 and capacitance current discharge loop 6 can be arranged in the switch board.

Each switch can adopt noncontacting switch, and a control module is set in switch board, through each noncontacting switch folding of control module control.

The utility model by the way, being implemented on the single line road existing fault current also has high pressure simultaneously and deposit, and reaches test objective.Produce needed current amplitude and electric current time-delay control and send into test circuit through current return; Produce required voltage through high tension loop and send into test circuit; When carrying out the short trouble simulation, reach needed test objective through Control current loop and high tension loop.Produce required capacitance current through the capacitance current loop, the earth is carried out switching through ground loop control high pressure; When carrying out the earth fault simulation, reach the purpose of test through control capacitance current return and ground loop.

Claims

1. the simulation test device of overhead high voltage line ground short circuit fault; Comprise analog line and hookup; It is characterized in that: said analog line comprises a test cable, and said test cable outside is an insulation course, and inside is cable core; Outside the insulation course of test cable, two sections conductive metal pipes of isolating each other of suit; Said hookup comprises current return, high tension loop, ground loop and capacitance current discharge loop, wherein,

2. the simulation test device of overhead high voltage line ground short circuit fault according to claim 1 is characterized in that: said current return, high tension loop, ground loop and capacitance current discharge loop all are arranged in the switch board.

3. the simulation test device of overhead high voltage line ground short circuit fault according to claim 2 is characterized in that: said each switch adopts noncontacting switch, and the control module of each noncontacting switch folding of control is set in said switch board.