CN201289510Y

CN201289510Y - Device for monitoring grounded screen operation

Info

Publication number: CN201289510Y
Application number: CNU2008201062024U
Authority: CN
Inventors: 孟雪; 李镇
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-10-17
Filing date: 2008-10-17
Publication date: 2009-08-12
Anticipated expiration: 2018-10-17

Abstract

The utility model provides a monitoring device for a ground grid, and solves the problem that the prior monitoring has poor real-time performance due to the routing inspection mode. The monitoring device comprises a ground grid monitoring point module, a ground grid reference point module, a monitoring module and an analysis module; the monitoring module is electrically connected with the ground grid monitoring point module and the ground grid reference point module respectively; the ground grid monitoring point module and the ground grid reference point module are electrically connected with different positions of the ground grid respectively; and the analysis module is electrically connected with the monitoring module so as to analyze the operating state of the ground grid in accordance with voltage signals received by the monitoring module from the ground grid monitoring point module and the ground grid reference point module. The utility model is mainly applied to the ground grid monitoring, and has stronger real-time performance in comparison with the prior art.

Description

Grounded screen operational monitoring device

Technical field

The utility model proposes a kind of grounded screen operational monitoring device.

Background technology

Grounded screen is one of the operational protection system in important places such as electric power, petrochemical industry, large-scale factories and miness, communal facility, important information center; grounded screen self and grounded screen well are electrically connected reliably to keeping between the earth, to guarantee facility and personnel's safety.Therefore the timely collection of grounded screen health data is very important work in the productive life.

At the collection of grounded screen service data, only limited to measurement in the past, can only understand the electric conductivity between grounded screen self and the earth, judged according to resistance between the each point of grounded screen inside whether connectivity is good between each point grounded screen electric resistance.And the testing process preface wants the main system of transformer station or the protection of other grounded screen out of service.

Have some emerging products to come grounded screen is further detected now, but it is good also to only limit on the grounded screen between each point point-to-point measurement resistance and connectivity, still is in the instrument class routine inspection mode simultaneously.Existing technology can only Static Detection grounded screen electric resistance value, can not change by dynamic surveillance grounded screen operation trend, can not obtain the situation reflection of grounded screen under the substation operation fault.

The utility model content

At defective that exists in the prior art and deficiency, the purpose of this utility model is to propose a kind of grounded screen operational monitoring device, the state of monitoring grounding net monitoring point in real time, the reliability of raising grounded screen.

In order to achieve the above object, the utility model proposes a kind of grounded screen monitoring device, it is characterized in that, comprising:

Grounded screen monitoring point module, grounded screen reference point module, monitoring modular;

Described monitoring modular is electrically connected described grounded screen monitoring point module and described grounded screen reference point module respectively;

Described grounded screen monitoring point module and described grounded screen reference point module are electrically connected with the diverse location of described grounded screen respectively;

Analysis module, described analysis module is electrically connected described monitoring modular, analyzes the grounded screen running status with the voltage signal of the described grounded screen monitoring point module that receives according to monitoring modular and described grounded screen reference point module.

Preferred as technique scheme, described monitoring device comprises:

External interface module, described external interface module are electrically connected described grounded screen monitoring point module and described grounded screen reference point module respectively, become digital signal with the conversion of signals that just receives;

Acquisition module, described acquisition module is electrically connected the digital signal that described external interface module is gathered described external interface module, and digital signal is sent to central processing module;

Central processing module, described central processing module is electrically connected described acquisition module, and monitors potential change according to the digital signal of acquisition module.

Preferred as technique scheme, described external interface module comprises:

Mutual inductor, clamper element and optocoupler; described grounded screen monitoring point module and described grounded screen reference point module are electrically connected with described mutual inductor; after mutual inductor is transformed to the discernible voltage signal of described acquisition module with voltage signal, send to described acquisition module through clamper element inhibition protection and optic coupling element insulation blocking.

Preferred as technique scheme, described grounded screen monitoring point module and described grounded screen reference point module are electrically connected with described monitoring modular by shielded cable.

Preferred as technique scheme, described grounded screen reference point module is electrically connected with the location device of the main transformer neutral point of grounded screen, and the down conductor of described location device is provided with mutual inductor, and described mutual inductor is electrically connected with described monitoring modular.

The utility model proposes a kind of grounded screen monitoring device, comprising: grounded screen monitoring point module, grounded screen reference point module, monitoring modular; Described monitoring modular is electrically connected described grounded screen monitoring point module and described grounded screen reference point module respectively; Described grounded screen monitoring point module and described grounded screen reference point module are electrically connected with the diverse location of described grounded screen respectively.The utility model prior art of comparing has the following advantages:

(1), device operation is independent, do not rely on substation secondary and protection information, gathering wiring is independent wiring, can not impact transforming plant protecting and control loop.

(2), real-time monitoring grounding net current potential information, make things convenient for operations staff and managerial personnel, understand the various running statuses of grounded screen at any time.Supervisory system need not execute-in-place, and data in real time is upgraded.

(3), picking rate is fast, and grounded screen potential acquisition, waveform under the abnormal conditions are shown, intuitively demonstrate the mutual electric potential relation in each monitoring point.

(4), software adopts the B/S pattern, intranet shares easily, any computing machine need not to install client software on LAN (Local Area Network), can check the grounding net of transformer substation real time data by the IE browser that microsoft operation system carries, and can inquire about every historical data at any time.

(5), the parameters of long term monitoring, contrast large-scale grounding network changes, and can prevent effectively that grounded screen from causing the generation of major accident.

Description of drawings

Fig. 1 is the grounded screen operational monitoring apparatus structure synoptic diagram that the utility model proposes;

Fig. 2 is the grounded screen operational monitoring device inner structure synoptic diagram that the utility model proposes;

Fig. 3 is the grounded screen operational monitoring device external interface module structural representation that the utility model proposes;

Fig. 4 is the grounded screen operational monitoring device current acquisition pie graph that the utility model proposes.

Embodiment

Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.For the person of ordinary skill in the field, to the detailed description of the present utility model, above-mentioned and other purposes of the present utility model, feature and advantage will be apparent.

The grounded screen operation pick-up unit preferred embodiment that the utility model proposes is selected a voltage monitoring reference point 3 as shown in Figure 1 on grounded screen 1, select a plurality of voltage monitoring points 2; Voltage monitoring reference point 3 is connected with monitoring modular 4 by shielded cable respectively with voltage monitoring point 2, and monitoring modular 4 is passed to analysis module with the incident of the data of gathering and generation and carries out analysis-by-synthesis, draws grounded screen security of operation result.Wherein analysis module can simply be an analysis computing machine.

By Fig. 2 monitoring device cut-away view as seen, 2 voltage signals of voltage reference point 3 and voltage monitoring point enter collecting unit 7 through external interface module 6 conversion, through collecting digital quantity, hand over central processing module analyzing and processing 8.Central processing module 8 obtains satellite time from GPS module 10, and image data is stamped timestamp, is stored in the memory module 9.Central processing module 8 is analyzed data simultaneously; if find the unusual or super warning of potential change of potential change; generation is added with the event information of timestamp; send grounded screen data and event information to analysis module 5 by communication module 11, analysis module carries out advanced analysis with 5 service datas and obtains the final operation conditions result of grounded screen.

By Fig. 3 external interface module functional diagram as seen, 3 voltages of monitoring point 2 and reference point enter mutual inductor 12 and are transformed to acquisition module 7 desired voltage signals, suppress protection and optic coupling element 14 insulation blockings through clamper element 13, deliver to acquisition module 7.

By Fig. 4 current acquisition pie graph as seen, in grounded screen 1, the voltage reference point of selecting 3 is generally the main transformer neutral point, and mutual inductor 17 is installed on the down conductor 16 of this main transformer neutral point position equipment 15, and mutual inductor 17 is sent to monitoring modular 4 by shielded cable with current signal.

Components and parts such as that the utility model device adopts is electric, electrical equipment connection, electronics, all select international standard and conventional components and parts to carry out design and assembly, the selection of each components and parts does not have unicity, its connected mode can require to be connected with requirement according to element, components and parts and annexation is not elaborated at this.

Though; the utility model clearly demonstrates by above embodiment and accompanying drawing thereof; yet under the situation that does not deviate from the utility model spirit and essence thereof; the person of ordinary skill in the field works as can make various corresponding variations and correction according to the utility model, but these corresponding variations and correction all should belong to the protection domain of claim of the present utility model.

Claims

1, a kind of grounded screen monitoring device is characterized in that, comprising:

2, grounded screen monitoring device according to claim 1 is characterized in that, described monitoring device comprises:

3, grounded screen monitoring device according to claim 2 is characterized in that, described external interface module comprises:

4, grounded screen monitoring device according to claim 1 is characterized in that, described grounded screen monitoring point module and described grounded screen reference point module are electrically connected with described monitoring modular by shielded cable.

5, grounded screen monitoring device according to claim 1, it is characterized in that, described grounded screen reference point module is electrically connected with the location device of the main transformer neutral point of grounded screen, and the down conductor of described location device is provided with mutual inductor, and described mutual inductor is electrically connected with described monitoring modular.