CN204882766U

CN204882766U - Power grid operation state monitoring case

Info

Publication number: CN204882766U
Application number: CN201520690062.XU
Authority: CN
Inventors: 武一鸣
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-09-09
Filing date: 2015-09-09
Publication date: 2015-12-16
Anticipated expiration: 2025-09-09

Abstract

The utility model discloses a power grid operation state monitoring case relates to a power grid operation state monitoring facilities, is to comprise box, central processing unit, current transformer, voltage transformer and harmonic detection circuit, and current transformer and voltage transformer's input inserts electric wire netting, the output inside central processing unit monitoring facilities 0 with locating the box in proper order through noise filter, AD converting circuit respectively, the input of harmonic detection circuit loops through noise filter, AD converting circuit and central processing unit circuit connection through leading current transformer access electric wire netting, output, and this central processing unit passes through drive circuit circuit connection active filter, and active filter inserts electric wire netting and noise filter respectively, central processing unit still respectively circuit hookup have memory, display screen and radio communication transceiver module I. This device can alleviate maintenance managers's work burden, is convenient for in time discover power system fault and carries out analysis, judgement to the trouble, be favorable to the trouble in time, get rid of effectively.

Description

Operation of power networks status monitoring case

Technical field

The utility model relates to a kind of operation of power networks condition monitoring device, refers more particularly to a kind of operation of power networks status monitoring case.

Background technology

Electrical network is in operational process, need to detect its running status at any time, prevent catastrophic failure, or after breaking down, also the managerial personnel that need repairing carry out eliminating process to fault in time, but maintenance management personnel cannot moment supervisory instrument, data, also can not can make in time fault and judging accurately, and then can cause unavoidable loss.

Summary of the invention

The purpose of this utility model is exactly to overcome the problems referred to above, provides a kind of operation of power networks status monitoring case.

Operation of power networks status monitoring case of the present utility model, be be made up of casing, central processing unit, current transformer, voltage transformer (VT) and harmonics detection circuit, the input end access electrical network of current transformer and voltage transformer (VT), output terminal are connected with the central processor circuit being located at box house successively respectively by noise filter, A/D change-over circuit; The input end of harmonics detection circuit is connected with central processor circuit by noise filter, A/D change-over circuit successively by preposition current transformer access electrical network, output terminal, this central processing unit is connected with source filter by driving circuit circuit, and active filter accesses electrical network and noise filter respectively; Central processing unit also respectively circuit be connected with storer, display screen and radio communication transceiver module I.

As further improvement of the utility model, current transformer is capacitive current transformer, and its end shield is provided with ground wire, and this ground wire is provided with Luo-coil, and Luo-coil is connected to noise filter by amplifying circuit.

As further improvement of the utility model, radio communication transceiver module I is the communication module using Zigbee protocol, and this radio communication transceiver module I circuit is connected with antenna.

As further improvement of the utility model, this operation of power networks status monitoring case also comprises the handheld terminal of separation, the display module, alert module and the memory module that are provided with radio communication transceiver module II in this handheld terminal and are connected with radio communication transceiver module II circuit.

Operation of power networks status monitoring case of the present utility model, structure is simple, economical, make the every operational factor of electrical network visual, the work load of maintenance management personnel can be alleviated, be convenient to Timeliness coverage electric network fault and fault is analyzed, judge, be conducive to fault timely, effectively get rid of, and process data can store, prevent unexpected power-off from causing loss of data, improve the reliability that data are preserved.

Accompanying drawing explanation

Fig. 1 is the structural drawing of operation of power networks status monitoring case of the present utility model;

Fig. 2 is the module map of operation of power networks status monitoring case of the present utility model.

Embodiment

Below in conjunction with accompanying drawing to operation of power networks status monitoring case of the present utility model, be described further: operation of power networks status monitoring case of the present utility model, its internal main will be divided into three kinds of functional circuits: first is the functional circuit of monitoring power network current, voltage parameter, in the circuit, the input end access electrical network of current transformer 3 and voltage transformer (VT) 4, its output terminal is connected with central processing unit 2 circuit being located at casing 1 inside successively respectively by noise filter 6, A/D change-over circuit 7.

Second for eliminating the functional circuit of electric harmonic in electrical network, in this circuit, the input end of harmonics detection circuit 5 is accessed electrical network, output terminal by preposition current transformer 16 and is connected with central processing unit 2 circuit by noise filter 6, A/D change-over circuit 7 successively, and this central processing unit 2 is connected with source filter 9 by driving circuit 8 circuit, make active filter 9 drop into according to actual conditions and to exit electrical network, this active filter 9 is also connected with noise filter 6 circuit simultaneously.

3rd is the functional circuit that current mulual inductor malfunction is diagnosed, in this circuit, current transformer 3 is capacitive current transformer, its end shield is provided with ground wire, this ground wire is provided with Luo-coil 13, Luo-coil 13 is connected to noise filter 6 by amplifying circuit 14, and noise filter 6 is connected with central processing unit 2 circuit by A/D change-over circuit 7.

Can preserve to make the result of circuit working, as seen, can pass on, then central processing unit 2 also respectively circuit be connected with storer 10, display screen 11 and radio communication transceiver module I12, wherein radio communication transceiver module I12 is the communication module using Zigbee protocol, and this radio communication transceiver module I12 circuit is connected with antenna 15.Operation of power networks status monitoring case is provided with polylith display screen 11, the display can carrying out different parameters according to actual needs divides, and the utility model also comprises the handheld terminal of separation, radio communication transceiver module II 17 is provided with in this handheld terminal, can and radio communication transceiver module I12 between carry out short-range radio communication, be connected with radio communication transceiver module II 17 circuit also have display module 18, alert module 19 and memory module 20.

Operation of power networks status monitoring case of the present utility model, the quality of power supply of current transformer 3 and voltage transformer (VT) 4 Real-Time Monitoring electrical network can be passed through, by display screen 11 display parameter in real time, and stored in storer 10 after passing through the analyzing and processing of central processing unit 2, in order to needing to carry out finishing analysis to it later; The harmonic wave existed in current electric grid can be detected by harmonics detection circuit 5, and carry out analyzing and processing rear drive active filter 9 by central processing unit 2 and access electrical network, harmonic wave in electrical network is compensated and offset, and the current waveform produced during active filter 9 fault and when active filter 9 drops into and exits electrical network, the load current waveform that harmonics detection circuit 5 detects all is sent to central processing unit 2 and processes, and be stored to storer 10, when being convenient to electrical network and active filter 9 fault, it being analyzed and judges; Luo-coil 13 detects the leakage current of current transformer 3, and by being sent to central processing unit 2 after the process such as amplification, noise reduction, analog to digital conversion, obtaining the characteristic quantity of leakage current, being judged by the fault of characteristic quantity to current transformer 3.

Because ZigBee to reach the operating distance of 30-50 rice usually in indoor, even 400 meters can be reached at outdoor open field, so handheld terminal can by maintenance management personnel on duty, have a rest, inspection time carry, at operation of power networks status monitoring case of the present utility model, when finding fault, handheld terminal can be sent information to by radio communication transceiver module I12, handheld terminal gives a warning and shows current failure information, and memory module 20 storage failure information derives by modes such as data lines.

Claims

1. operation of power networks status monitoring case, be be made up of casing (1), central processing unit (2), current transformer (3), voltage transformer (VT) (4) and harmonics detection circuit (5), it is characterized in that the input end of current transformer (3) and voltage transformer (VT) (4) accesses electrical network, output terminal is connected with central processing unit (2) circuit being located at casing (1) inside successively respectively by noise filter (6), A/D change-over circuit (7); The input end of harmonics detection circuit (5) is connected with central processing unit (2) circuit by noise filter (6), A/D change-over circuit (7) successively by preposition current transformer (16) access electrical network, output terminal, this central processing unit (2) is connected with source filter (9) by driving circuit (8) circuit, and active filter (9) accesses electrical network and noise filter (6) respectively; Central processing unit (2) also respectively circuit be connected with storer (10), display screen (11) and radio communication transceiver module I(12).

2. operation of power networks status monitoring case according to claim 1, it is characterized in that current transformer (3) is capacitive current transformer, its end shield is provided with ground wire, this ground wire is provided with Luo-coil (13), and Luo-coil (13) is connected to noise filter (6) by amplifying circuit (14).

3. operation of power networks status monitoring case according to claim 1, is characterized in that radio communication transceiver module I(12) for using the communication module of Zigbee protocol, this radio communication transceiver module I(12) circuit is connected with antenna (15).

4. operation of power networks status monitoring case according to claim 1, it is characterized in that this operation of power networks status monitoring case also comprises the handheld terminal of separation, the display module (18), alert module (19) and the memory module (20) that are provided with radio communication transceiver module II (17) in this handheld terminal and are connected with radio communication transceiver module II (17) circuit.