CN202362089U

CN202362089U - Overload pre-warning system for transformer

Info

Publication number: CN202362089U
Application number: CN2011204996422U
Authority: CN
Inventors: 魏本刚; 黄华; 傅晨钊; 张鹏翔; 刘红星; 姜林
Original assignee: NINGBO LIGONG ONLINE MONITORING TECHNOLOGY Co Ltd; East China Power Test and Research Institute Co Ltd
Current assignee: NINGBO LIGONG ONLINE MONITORING TECHNOLOGY Co Ltd; East China Power Test and Research Institute Co Ltd
Priority date: 2011-12-05
Filing date: 2011-12-05
Publication date: 2012-08-01
Anticipated expiration: 2021-12-05

Abstract

The utility model relates to an overload pre-warning system for a transformer. A transformer top-layer oil temperature detection module, a transformer high-voltage side load current detection module and a substation environment temperature detection module are connected into a data acquisition and processing module; the data acquisition and processing module is connected into an upper computer display and control module; and a transformer device parameter module is connected into the upper computer display and control module which is connected into the data acquisition and processing module. The overload pre-warning system for the transformer has the beneficial effects that the transformer middle-layer oil temperature is collected to establish an equivalent thermal circuit model to calculate the hot spot temperature on the transformer in a certain time length in advance; and each data of the existing transformer at an overload working condition can be accurately analyzed and processed by adopting an upper-limit prewarning and tendency prewarning mechanism of the hot spot temperature, thereby achieving safe estimation and reducing occurrence of accidents.

Description

A kind of transformer overload early-warning system

Technical field

The utility model relates to a kind of power equipment detection system, particularly a kind of transformer overload early-warning system.

Background technology

Existing detection system comprises transformer top-oil temperature detection module, transformer high-voltage lateral load current detection module, substation temperature detecting module, data acquisition and processing module, host computer demonstration and control module and transformer equipment parameter module; Collection transformer middle level oil temperature is set up equivalent hot road model and had both been shifted to an earlier date the hot(test)-spot temperature after the certain time length on the calculating transformer; Do not adopt the alert mechanism of pre-alarm of the hot(test)-spot temperature upper limit and trend prediction yet; Can accurately not handle, can not give warning in advance each item data analysis of existing transformer under the overload condition of work.

The utility model content

The purpose of the utility model provides a kind of transformer overload early-warning system, to overcome above-mentioned described defective.

The described a kind of transformer overload early-warning of the utility model system realizes through following technical scheme: a kind of transformer overload early-warning system; Comprise transformer top-oil temperature detection module, transformer high-voltage lateral load current detection module, substation temperature detecting module, data acquisition and processing module, host computer demonstration and control module and transformer equipment parameter module; Transformer top-oil temperature detection module, transformer high-voltage lateral load current detection module and the equal parallel connection of substation temperature detecting module are linked into data acquisition and processing module; Data acquisition and processing module insert host computer and show and control module, data interaction between said data acquisition and processing module and host computer demonstration and the control module; The transformer equipment parameter module inserts host computer and shows and control module, and host computer shows and control module access data acquisition and processing module.

The beneficial effect of the described a kind of transformer overload early-warning of the utility model system is: gather transformer middle level oil temperature and set up that equivalent hot road model can shift to an earlier date on the calculating transformer hot(test)-spot temperature after the certain time length and to have adopted pre-alarm of the hot(test)-spot temperature upper limit and trend prediction alert machine-processed; Can be to existing transformer each association under overload condition of work analyzing and processing accurately; Reach safe estimation, the generation of minimizing accident.

Description of drawings

According to accompanying drawing the utility model is done further explain below.

Fig. 1 is the structured flowchart of the described a kind of transformer overload early-warning of the utility model embodiment system.

The name that mark is corresponding among the figure is called:

1, transformer top-oil temperature detection module; 2, transformer high-voltage lateral load current detection module; 3, substation temperature detecting module; 4, data acquisition and processing module; 5, host computer shows and control module; 6, transformer equipment parameter module.

Embodiment

As shown in Figure 1; The described a kind of transformer overload early-warning of the utility model embodiment system; Comprise that transformer top-oil temperature detection module 1, transformer high-voltage lateral load current detection module 2, substation temperature detecting module 3, data acquisition and processing module 4, host computer show and control module 5 and transformer equipment parameter module 6; Transformer top-oil temperature detection module 1, transformer high-voltage lateral load current detection module 2 and the 3 equal parallel connections of substation temperature detecting module are linked into data acquisition and processing module 4; Data acquisition and processing module 4 insert host computer and show and control module 5; Data interaction between data acquisition and processing module 4 and host computer demonstration and the control module 5; Transformer equipment parameter module 6 inserts host computer and shows and control module 5, and host computer shows and control module 5 inserts data acquisition and processing module 4.

The described transformer overload early-warning of the utility model system works principle: obtain in the survey sensor of the data in the transformer top-oil temperature detection module 1 by the configuration of transformer body, sensor output signal is the current signal of 4-20mA.Data in the transformer high-voltage lateral load current detection module 2 can be measured CT secondary side current data through the punching small electric current sensor and obtain, and small electric current sensor output signal still is the current signal of 4-20mA.For fear of receiving the transformer-cabinet Influence of Temperature, environment temperature detects data need adopt the PT100 temperature sensor in the position measurement with a certain distance from transformer, its output signal also is set to the current signal of 4-20mA.Data acquisition and processing module are based on the signals collecting and the processing module of DSP exploitation, and the analog signal conversion that sensor is exported is that digital signal is analyzed and handled, and adopts TCP communication protocol that the result is uploaded to host computer then and shows.Simultaneously; Can show with 5 pairs of data collections of control module and processing unit through host computer and control; As the following biography of transformer equipment parameter and modification, signal acquisition periods setting, system stop with operation etc. all be data or instruction to be issued in the dsp processor through host computer; The host computer instruction issues adopts UDP communication, and adopts answer-mode.In the data inputting interface of host computer demonstration and control module 5, transformer equipment parameter module 6 is imported; Data collection cycle nT, pre-estimation duration pT etc. are set; The host computer data message will reach among the DSP down when system start-up automatically, also can through following teletype command with data transmission to DSP.When system does not start, the sampling of data acquisition and processing module 4 stop signals, but transformer top-oil temperature detection module 1, transformer high-voltage lateral load current detection module 2, substation temperature detecting module 3 keep uploading current signal.When system start-up, data acquisition and processing module 4 begin sensor signal is sampled so, and the sampling period is nT.The current value that sampling is obtained is converted into the actual value of detected object by calibration formula; And combine the long pT of potential device parameter prediction timing, through hot-spot temperature of transformer value and current hot(test)-spot temperature behind the operation pT duration under the equivalent hot road model assessment present load of setting up based on transformer middle level oil temperature.Result of calculation is uploaded to host computer to be shown and control module 5; Be provided with alarm mechanism in the host computer; Adopt upper limit pre-alarm and trend prediction alert; If the hot(test)-spot temperature behind the pT duration is greater than alarm threshold value, then system will send upper limit pre-alarm signal, and trend prediction is alert then to be judged whether to report to the police through the variation tendency of analyzing current hot(test)-spot temperature value and history value.

The utility model is not limited to above-mentioned preferred forms; Anyone can draw other various forms of products under the enlightenment of the utility model; No matter but on its shape or structure, do any variation; Every have identical with a application or akin technical scheme, all drops within the protection domain of the utility model.

Claims

1. transformer overload early-warning system; Comprise that transformer top-oil temperature detection module (1), transformer high-voltage lateral load current detection module (2), substation temperature detecting module (3), data acquisition and processing module (4), host computer show and control module (5) and transformer equipment parameter module (6); It is characterized in that: transformer top-oil temperature detection module (1), transformer high-voltage lateral load current detection module (2) and substation temperature detecting module (3) all parallel connection are linked into data acquisition and processing module (4); Data acquisition and processing module (4) insert host computer and show and control module (5); Transformer equipment parameter module (6) inserts host computer and shows and control module (5), and host computer shows and control module (5) inserts data acquisition and processing module (4).