CN103151844A - State monitoring system for transformer and GIS (gas insulated switchgear) in transformer substation - Google Patents

Abstract

The invention discloses a state monitoring system for a transformer and a GIS in a substation, comprising a transformer, a plurality of first intelligent electronic devices connected to the transformer, a GIS, a plurality of second intelligent electronic devices connected to the GIS, and connected to each first intelligent electronic device respectively. The switch of the smart electronic device and each second smart electronic device and the upper computer connected to the switch; each first smart electronic device includes a first sensor, a first filter, a first signal amplifier, and a first A/D converter , DSP, a first FPGA, a first power supply, and a first RAM; each second intelligent electronic device includes a second sensor, a second filter, a second signal amplifier, a second A/D converter, an MCU, a second FPGA, second power supply and second RAM. The present invention avoids the lack of collection signals and inaccurate results caused by electromagnetic interference by performing filtering, amplification and other processing on the collection signals.

Description

A Condition Monitoring System for Transformer and GIS in Substation

technical field

The invention relates to a state monitoring system, in particular to a state monitoring system for transformers and GIS (GASINSULATED SWITCHGEAR, gas insulated fully enclosed combined electrical appliances) in substations.

Background technique

Transformers and GIS are two relatively important equipment in substations. Their stable operation is of great significance to the construction of smart substations, so real-time monitoring of their operating status is required. The traditional monitoring implementation method is relatively complicated, requires special detection equipment, and is costly. Moreover, because of the high-voltage and strong magnetic field environment in the substation, it is susceptible to electromagnetic interference, resulting in the lack of data acquisition signals and other situations, and accurate detection results cannot be obtained.

Contents of the invention

The purpose of the present invention is to provide an easy-to-implement and low-cost state monitoring system for transformers and GIS in substations, which can filter and amplify the collected signals, and adopt a multi-channel collection method that does not interfere with each other, thereby avoiding It eliminates the lack of acquisition signal and inaccurate results caused by electromagnetic interference.

The technical scheme for realizing the above-mentioned purpose is:

A condition monitoring system for transformers and GIS in substations, characterized in that it includes transformers, several first intelligent electronic devices (IEDs) connected to the transformers, GIS, several second intelligent electronic devices connected to the GIS, switches and Host computer, including:

The switch is respectively connected to each first intelligent electronic device and each second intelligent electronic device;

The host computer is connected to the switch;

Each of the first intelligent electronic devices includes a first sensor, a first filter, a first signal amplifier, a first A/D (analog/digital) converter, a DSP (Digital Signal Processing, digital signal processor), The first FPGA (Field-Programmable Gate Array, field programmable gate array), the first power supply and the first RAM (random access memory, random access memory), wherein:

The first sensor is connected to the transformer;

The first sensor, the first filter, the first signal amplifier, the first A/D converter, the DSP and the first FPGA are sequentially connected;

The first power supply is connected to the DSP and the first FPGA respectively;

The first RAM is connected to the first FPGA;

The first FPGA is connected to the switch;

Each of the second intelligent electronic devices includes a second sensor, a second filter, a second signal amplifier, a second A/D converter, an MCU (microprocessor), a second FPGA, a second power supply, and a second RAM, where:

the second sensor is connected to the GIS;

The second sensor, the second filter, the second signal amplifier, the second A/D converter, the MCU and the second FPGA are sequentially connected;

The second power supply is connected to the MCU and the second FPGA respectively;

The second RAM is connected to the second FPGA;

The second FPGA is connected to the switch.

The beneficial effects of the present invention are: the present invention realizes the collection of GIS and transformer operation parameters through multi-channel collection, and finally realizes data analysis and result evaluation by the upper computer through the interaction of switches. At the same time, the present invention performs a series of preprocessing on the acquisition signal through a filter, a signal amplifier and an A/D converter, thereby avoiding the lack of acquisition signal and inaccurate results caused by electromagnetic interference. Moreover, compared with the traditional monitoring device, the present invention is simple in structure, easy to realize and low in cost, and has high practicability.

Description of drawings

Fig. 1 is the structural representation of the condition monitoring system that is used for transformer and GIS in substation of the present invention;

Fig. 2 is a schematic structural diagram of the first intelligent electronic device in the present invention;

Fig. 3 is a schematic structural diagram of a second intelligent electronic device in the present invention.

Detailed ways

The present invention will be further described below in conjunction with accompanying drawing.

Please refer to Fig. 1 and Fig. 2, the condition monitoring system for transformer and GIS in the substation of the present invention includes transformer 1, some first intelligent electronic devices 2 connected to this transformer 1, GIS3, some second intelligent electronic devices connected to this GIS3 Electronic equipment 4, switch 5 and host computer 6, wherein:

The switch 5 is respectively connected to each first intelligent electronic device 2 and each second intelligent electronic device 4;

The upper computer 6 is connected to the switch 5;

Each first intelligent electronic device 2 includes a first sensor 21, a first filter 22, a first signal amplifier 23, a first A/D converter 24, a DSP 25, a first FPGA 26, a first power supply 27 and a first RAM 28 ,

The first sensor 21 is connected to the transformer 1;

The first sensor 21, the first filter 22, the first signal amplifier 23, the first A/D converter 24, the DSP25 and the first FPGA26 are connected in sequence;

The first power supply 27 is respectively connected to the DSP25 and the first FPGA26;

The first RAM28 is connected to the first FPGA26;

The first FPGA26 is connected to the switch 5;

Each second intelligent electronic device 4 includes a second sensor 41, a second filter 42, a second signal amplifier 43, a second A/D converter 44, a MCU45, a second FPGA46, a second power supply 47 and a second RAM48 ,

The second sensor 41 is connected to GIS3;

The second sensor 41, the second filter 42, the second signal amplifier 43, the second A/D converter 44, the MCU45 and the second FPGA46 are connected in sequence;

The second power supply 47 is connected to the MCU45 and the second FPGA46 respectively;

The second RAM48 is connected to the second FPGA46;

The second FPGA 46 is connected to the switch 5 .

The principle of the present invention: taking the transformer 1 (similar to GIS3) as an example, each first intelligent electronic device 2 collects a parameter for monitoring by the first sensor 21 in it, and outputs an analog signal representing the parameter. After the signal passes through the first filter 22, the first signal amplifier 23 and the first A/D converter 24 in turn, it is converted into a digital signal and sent to the DSP25 (for GIS3, to the MCU45), and the DSP25 classifies, compares, and After preprocessing such as error checking, it is sent to the first FPGA26, which is sent to the first RAM28 for storage and passed to the host computer 6 through the switch 5, so as to realize in-depth data analysis and result evaluation, and achieve the purpose of monitoring.

In the present embodiment, the model selected by DSP25 is TMS320F2808; the model selected by MCU45 is AT91RM9200-QU-002; the models selected by the first signal amplifier 23 and the second signal amplifier 43 are all SZKSY-ISO-A3-P1-O2; The models selected by the first FPGA26 and the second FPGA46 are both EP1C6Q240C8.

Claims (1)

1. condition monitoring system that is used for transformer station's transformer and GIS, it is characterized in that, comprise transformer, connect this transformer some the first intelligent electronic devices, GIS, connect some the second intelligent electronic devices, switch and the host computer of this GIS, wherein:

Described switch connects respectively each first intelligent electronic device and each second intelligent electronic device;

Described host computer connects described switch;

Described each first intelligent electronic device includes first sensor, the first filter, first signal amplifier, the first A/D converter, DSP, a FPGA, the first power supply and a RAM, wherein:

Described first sensor connects described transformer;

Described first sensor, the first filter, first signal amplifier, the first A/D converter, DSP and a FPGA connect successively;

Described the first power supply connects respectively described DSP and a FPGA;

A described RAM connects a described FPGA;

A described FPGA connects described switch;

Described each second intelligent electronic device includes the second transducer, the second filter, secondary signal amplifier, the second A/D converter, MCU, the 2nd FPGA, second source and the 2nd RAM, wherein:

Described the second transducer connects described GIS;

Described the second transducer, the second filter, secondary signal amplifier, the second A/D converter, MCU and the 2nd FPGA connect successively;

Described second source connects respectively described MCU and described the 2nd FPGA;

Described the 2nd RAM connects described the 2nd FPGA;

Described the 2nd FPGA connects described switch.

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