CN202837430U

CN202837430U - AC circuit automatic check-out system platform

Info

Publication number: CN202837430U
Application number: CN201220446724.5U
Authority: CN
Inventors: 陈勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-09-04
Filing date: 2012-09-04
Publication date: 2013-03-27
Anticipated expiration: 2022-09-04

Abstract

An AC circuit automatic check-out system platform is characterized by comprising primary equipment and control portion thereof, and a secondary detection portion. The beneficial effects are provided as following: a transformer station primarily outputs an AC current (or a voltage), the primary AC current (or the voltage) is transformed to a secondary current (or a voltage) through an AC primary circuit, a mutual inductor and an AC secondary circuit, through electric measure to a secondary terminal electrical amount, the correctness of the AC current voltage circuit of the transformer station is detected, the AC circuit automatic check-out system platform is characterized in that the AC circuit automatic check-out system platform is simple and high-efficient, the effect is good, etc., and the safe and stable operation of an electrical network is maintained.

Description

A kind of ac circuit automatic checking system platform

Technical field

The utility model belongs to electrotechnics, relates in particular to a kind of platform of automatically being tested in the AC current-voltage loop (for ease of setting forth, being called for short verifying bench).

Background technology

57 minutes 43 seconds on the 18th October in 2000, Yunnan Power System 220kV Yuanmou becomes electricity station ﹟ 1 main transformer LEP-973G public winding zero sequence overcurrent protection and moves three side switch trips, and the Yuanmou becomes except the 220kV inlet wire, no-voltage of entire station.Totally four electric railway tractions of Yuanmou, Yang Jiuhe, the pasture heart and bight that causes the substation's confession of 220kV Yuanmou becomes dead electricity and reaches 68 minutes, causes elder brother's iron 13 row lorries 1 row passenger train to stop transport.Great economic loss and bad social influence have been caused.Accident occurs by checking that Fa Xian ﹟ 1 main transformer zero sequence loop seals in the B phase current, and this does not all find the accident potential that this is great in Installation and Debugging and the course of receiving.

On Dec 13rd, 2011; the Yunnan Power System 110kV high bridge 10kV of transformer station of institute II section bus PT blast; correct operation should be by the 10kV back-up protection of #2 main transformer or 110kV back-up protection action excision fault; but the 2# main transformer backup protection is action not; cause high bridge institute to become; Jingan County becomes deperssurization emergency; loss load 79.13MW; loss load proportion 10%; the power supply user ratio 5.3% that has a power failure; check to find the 2# main transformer backup protection not have the reason of action be on-the-spot installation personnel the voltage circuit mistake that No. 2 main transformer 10kV side composite voltage locking overcurrents are protected has been connected into 110kV I section busbar voltage; this problem is present; lack the standard of relevant AC current-voltage loop field adjustable work, site test work is also lack of standardization.Domestic and international all complete AC current-voltage in-circuit testing instrument systems of nonfunctional.The on-the-spot dry cell that mainly utilizes cooperates the equipment such as pointer multimeter, cable sorter, pincerlike phase meter, relay-protection tester, mutual-inductor tester and strong current generator to finish the check of loop individual equipment, lacks integrality and systematicness.

Owing to be subjected to the limitation of specialty, various test platforms or for primary equipment perhaps for secondary device, are only tested to the single equipment element.Lack whole treat the factory station once, secondary device and between the system concept of relation, for the AC current-voltage circuit system that connects between primary equipment and the secondary device, shortage is for the verifying bench of AC current-voltage circuit system, cause the AC current-voltage loop can not obtain fully, effectively check, thereby cause the generation of some electric power accidents.

Because site test does not have special-purpose verifying bench, each site test all will connect various testing equipments and the instrument of a secondary, bring great waste to human resources, the correct matching problem of mutual inductor and secondary device is outstanding under different personnel, the distinct methods, does not set up science, objective, automatic checking system.There is the not high problem of test mass in the AC current-voltage loop, so be badly in need of the AC current-voltage loop automatic checking system unified standard site test of research and development one cover science.

By this AC current-voltage in-circuit testing system platform; the total solution of site test is provided; can finish safely, efficiently, at low cost field test work; unified and standard factory station AC current-voltage in-circuit testing method; for standardized work provides strong guarantee; guarantee the correctness in current/voltage loop, the reliability service of the electrical secondary equipments such as guarantee electric grid relay protection is guaranteed factory's station safe and stable operation.

The utility model content

Under such technical background, for solving the problem of above-mentioned existence, this verifying bench can to AC current-voltage once, the connection of secondary circuit tests, and finds no-load voltage ratio problem and an equipment, wire connects and the leakage of secondary screen cabinet case wiring, wrong problem; Checkability to the alternating current loop is high, effective, and more comprehensive and system, the security risk less.

The purpose of the utility model utility model is achieved by the following technical solution.

A kind of ac circuit automatic checking system platform, the utility model comprise once and control section and secondary detection part; Wherein:

Once and control section comprise microprocessor, a Data collecting conversion device, analog to digital converter A, on-off controller, LCD MODULE, the state load module, input keyboard, wireless communication data transmitter A, data-carrier store, printer, communication interface A, power module, the voltage regulation and frequency modulation control module, power safety, the air power switch, power supply frequency modulation and voltage modulation device, standard current transformer, power light, the wiring of input power source post, the out-put supply binding post, earth terminal; Its annexation is: the wiring of input power source post is connected to the air power switch, and the air power switch is connected to power safety; Power safety outlet one end is connected to power supply frequency modulation and voltage modulation device, and the other end is connected to power light; Standard current transformer is passed in the outlet of power supply frequency modulation and voltage modulation device, is connected to the out-put supply binding post; The outlet of power supply frequency modulation and voltage modulation device is connected to the out-put supply binding post, and is connected to the Data collecting conversion device one time; Earth terminal one end is connected to power supply frequency modulation and voltage modulation device, and the other end connects power light, and is connected to the Data collecting conversion device one time; The Secondary Winding of standard current transformer is connected with a Data collecting conversion device, one time the Data collecting conversion device is connected to analog to digital converter A, analog to digital converter A receives microprocessor, and microprocessor is connected with on-off controller, LCD MODULE, input keyboard, wireless communication data transmitter A, data-carrier store, printer, voltage regulation and frequency modulation control module, communication interface A, power module respectively; Power module is connected with air power switch, earth terminal, 220V AC power respectively;

Secondary detection partly comprises: pincerlike measuring sonde, secondary data Collect conversion device, analog to digital converter B, wireless communication data transmitter B; Its annexation is: pincerlike measuring sonde sequentially is connected with secondary data Collect conversion device, analog to digital converter B, analog to digital converter B, is provided with communication interface B and carries out communication by wireless signal with wireless communication data transmitter B and be connected the transmission of data.

Up-flow of the utility model boosts and partly carries out various exchanges data with the secondary detection part by wireless transmission; secondary detection partly can collect single test voltage (or electric current) conduct with reference to vector by wireless transmission, the phase reference of fixing as unification when the current/voltage that carries out the protection screen cabinet detects.

The beneficial effects of the utility model are, at transforming plant primary output AC electric current (or voltage), transformer station is by exchanging primary circuit, mutual inductor, interchange secondary circuit, change the secondary current (or voltage) of input screen cabinet into, by the measurement to the secondary terminals electric parameters, the correctness in the AC current-voltage loop of check transformer station has the characteristics easy, that efficient is high, effective, thereby safeguards the safe and stable operation of electrical network.

Below in conjunction with drawings and Examples the utility model is described further.

Description of drawings

Fig. 1 is that the utility model automatic checking system platform once reaches control section connection principle synoptic diagram;

Fig. 2 is the utility model automatic checking system platform secondary part connection principle synoptic diagram;

Fig. 3 is the utility model automatic checking system platform application primary circuit synoptic diagram.

Embodiment

See Fig. 1, a kind of ac circuit automatic checking system platform, the utility model comprise once and control section and secondary detection part; Wherein:

See Fig. 2, secondary detection partly comprises: pincerlike measuring sonde, secondary data Collect conversion device, analog to digital converter B, wireless communication data transmitter B; Its annexation is: pincerlike measuring sonde sequentially is connected with secondary data Collect conversion device, analog to digital converter B, analog to digital converter B, is provided with communication interface B and carries out communication by wireless signal with wireless communication data transmitter B and be connected the transmission of data.

Primary equipment current transformer current flowing, produce secondary current at secondary side circuit, the pincerlike measuring sonde that adopts the secondary detection part carries out secondary current at the terminal of bin screen and detects, and the signal that pincerlike measuring sonde detects is by secondary data Collect conversion device, analog to digital converter B, wireless communication data transmitter B and part inlet wire exchanges data once.

Microprocessor is used for the operation calculating of software and the monitoring of peripherals, and input keyboard is used for input message, and LCD MODULE is used for output display information, shows electric current and voltage, and the phasing degree, can show amplitude and the phase place of the three-phase test power supply of output.Communication interface A can with the external unit swap data, wireless transport module 1 sending and receiving wireless signal realizes that data transmit, and can carry out the real-time radio data transmission with the wireless communication data transmitter B of secondary detection part.Adopt voltage regulation and frequency modulation control module control power supply frequency modulation and voltage modulation device, the voltage of regulation output, electric current and frequency are to reach up-flow once, the purpose of boosting and adjusting frequency.Air power switch and power safety be timely tripping or fusing when transmission line circuit has short-circuit conditions, guarantees device security.Standard current transformer is used for large current transitions is become little electric current.A Data collecting conversion device is transformed into the electric parameters that collects the input quantity of analog to digital converter A.Analog to digital converter A converts analog quantity to numeral, offers microprocessor.Data storage can be used for store various kinds of data.Power module provides normal operation needed power supply for the microprocessor that needs working power etc.

Basic functional principle is, see Fig. 1, input three-phase positive phase sequence working power, the external power binding post that the three-phase and four-line alternating current input power supplying is arranged, by air power switch output voltage to power safety, power safety output three-phase voltage is to power supply frequency modulation and voltage modulation device, get single phase poaer supply and monitor the power supply situation to power light, microprocessor is by the control of voltage regulation and frequency modulation control module, regulate power supply frequency modulation and voltage modulation device, make power supply frequency modulation and voltage modulation device regulate the once electric current of output, voltage and frequency, satisfy the secondary current testing requirement, power supply frequency modulation and voltage modulation device output line passes standard current transformer and receives the out-put supply binding post, the standard current transformer Secondary Winding induces electric current and is linked into the Data collecting conversion device one time, and power supply frequency modulation and voltage modulation device output voltage is linked into the Data collecting conversion device one time.

See Fig. 3,20167 earthing isolators close at 220kV side position 1 place, three relative ground circuits are set, a up-flow of check checking system platform boost out-put supply binding post A2, B2, the C2 of part, with test wire one by one correspondence connect factory station A, a B, C phase, the air power switch that closes, the electric current of regulation output, observe the boost electric current of part output of up-flow, but until the degree of secondary detected amplitude and phase place.Secondary detection is partly accepted once the data of institute's Accelerated Life voltage U A (or UB or UC) in real time by Wireless Transmitter, and sets A(or B or C) phase voltage is the fixed reference vector that secondary current detects.See Fig. 2, at protection screen cabinet (or terminal box) current terminal, use pincerlike current measurement probe, secondary cable wiring (being inlet wire on the figure) is detected, detect amplitude and the phasing degree of electric current secondary loop.By the analysis to the data that detect, judge the correctness of circuit connection.

When output 50Hz frequency, because because secondary current is little, in the time of can not detecting electric current, the frequency of capable of regulating out-put supply, increase once reaches secondary current, until secondary can detect amplitude and the phase place of electric current.

The stand check of other current transformer ac voltage circuit of factory can be by adjusting short dot, adjust add the position of power supply, make electric current flow through more current transformer once, detect the secondary current of these current transformers, reach the purpose of inspection.

Detect the method for voltage circuit, disconnect the electric once whole short circuit grounding points in factory station, voltage transformer (VT) on the bus belt, with checking system platform regulation output to once boosting, then, at secondary voltage terminal test secondary voltage amplitude and phasing degree, method is basic identical with the detection electric current.

Claims

1. an ac circuit automatic checking system platform is characterized in that, comprises once and control section and secondary detection part; Wherein: