CN202916391U

CN202916391U - Ultrahigh frequency method based online monitoring and positioning device for partial discharge of transformer station

Info

Publication number: CN202916391U
Application number: CN 201220525368
Authority: CN
Inventors: 孙国陇
Original assignee: Individual
Current assignee: Shaanxi Public Intelligent Technology Co ltd
Priority date: 2013-01-30
Filing date: 2013-01-30
Publication date: 2013-05-01
Anticipated expiration: 2023-01-30

Abstract

The utility model discloses an ultrahigh frequency method based online monitoring and positioning device for partial discharge of a transformer station, comprising four ultrahigh-frequency sensors, four partial discharge collectors and a data server. The four ultrahigh-frequency sensors are respectively pasted on the four partial discharge collectors and are arranged in four corners of the transformer station in a matrix manner; electromagnetic wave signals generated in the discharge process of a discharge source are synchronously received; and partial discharge states of the transformer station are monitored online. The online monitoring and positioning device of the utility model has the advantages including convenient installation, strong anti-interference capability and low cost, greatly improves the sensitivity and accuracy of online monitoring and positioning for partial discharge of the transformer station, can be widely applied to the power industry, and can effectively solve the problems that the prior transformer station is high in installation cost and large in later maintenance workload.

Description

A kind of transformer station's partial discharge monitoring and locating device based on the ultrahigh frequency method

Technical field

Present technique relates to a kind of transformer station detection technique field, is specifically related to a kind of transformer station's partial discharge monitoring and locating device based on the ultrahigh frequency method.

Background technology

Partial discharge phenomenon all may occur in any high-tension apparatus in the transformer station, want at present whole primary equipments of transformer station are implemented monitoring, need to local discharge on-line monitoring device be installed at all equipment, cost is very high like this, the efficient that monitoring system is used is also very low, and the maintenance workload in monitoring equipment later stage is also very large like this.Therefore, the on-line monitoring technique that the present offices such as ultrahigh frequency put has got the nod, but because cost is higher, is not widely used always.

The utility model content

For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of transformer station's partial discharge monitoring and locating device based on the ultrahigh frequency method, it is characterized in that: the uhf sensor office of sticking on puts on the surface of collector, by adopting the long concentric cable of 10CM to connect, four corner A that collector employing matrix form is positioned over respectively transformer station are put in each group uhf sensor drawn game, B, C, the D place, the zero-time of the electromagnetic wave signal that produces in four same discharge source discharge processes of uhf sensor Synchronous Receiving, based on the mistiming of signal, we list system of equations, solve the position of discharge signal, just can realize the location of discharge signal.Simultaneously, office puts collector electromagnetic wave signal is gathered storage, data server is put collector with each innings and is adopted optical fiber to be connected, by optical fiber the data that collect are sent to data server, data server is processed by data, thus can on-line monitoring to the shelf depreciation situation of transformer station.

Technique scheme can be found out, because implementing that collector is put in each group uhf sensor drawn game, the utility model adopt matrix form to be positioned over respectively four angle A, B, C, the D place of transformer station, the electromagnetic wave signal that produces in four same discharge source discharge processes of uhf sensor Synchronous Receiving, judge that switch cubicle is in the normal shelf depreciation that whether occured in service, and the mistiming of basis signal, by solving equations the signal that discharge source occurs is positioned.Therefore the utility model is compared with existing technology and has the following advantages:

1. cost is low, and efficient is high, and full station only needs a cover partial discharge monitoring device.Traditional method will be implemented monitoring to an electrical equipment at full station, need to partial discharge monitoring device be installed all on all devices, and cost is high, and the monitoring equipment service efficiency is low.

2. simple installation does not need to have a power failure, and has avoided traditional individual equipment that the economic loss of bringing because of power failure is installed.

3. strong interference immunity.The one, adopt the ultrahigh frequency method, Observational frequency band effectively reduces the space corona and disturbs at 300M-1500M; The 2nd, the uhf sensor drawn game is put between the collector and to be adopted the concentric cable of 10cm to transmit, and has avoided greatly causing because cable is long outside electromagnetic interference.

4. highly sensitive, velocity of EM-waves is stable, is equivalent to the light velocity, and the equipment that can put generation office in the transformer station accurately positions.

Description of drawings

For clearer explanation the utility model embodiment or technical scheme of the prior art, the below will do simple introduction to the accompanying drawing of required use among the embodiment or in the description of the Prior Art.

Fig. 1 is structural representation of the present utility model.

Fig. 2 is that the uhf sensor office of sticking on puts on the collector and to adopt the matrix pattern to be positioned over respectively the demonstration graph at transformer station four corner A, B, C, D place.

Description of reference numerals:

1. transformer station; 2. uhf sensor; 3. collector is put in office;

4. concentric cable; 5. optical fiber; 6. data server.

Embodiment

Mainly comprise with reference to Fig. 1 the present embodiment: data server 6, collector 3 is put in office, uhf sensor 2, package unit comprises that four uhf sensors 2 and four offices put collector 3, uhf sensor 2 offices of sticking on put on the surface of collector 3, adopt coaxial cable for high frequency 4 to connect, for avoiding extraneous corona to disturb, we adopt the long concentric cable of 10CM 4 to connect, four corner A that collector 3 employing matrix forms are positioned over respectively transformer station 1 are put in each group uhf sensor 2 drawn game, B, C, the D place, data server 6 is put collector 3 respectively at 4 offices and is adopted optical fiber 4 to connect, by optical fiber 4 data that collect are sent to data server 6, data server 6 is processed by data, thereby can to transformer station whether shelf depreciation occur by on-line monitoring.

Collector 3 is put in each group uhf sensor 2 drawn game adopts matrix form to be positioned over respectively four corner A, B, C, the D place of transformer station 1, the zero-time of the electromagnetic wave signal that produces in four same discharge source discharge processes of uhf sensor 2 Synchronous Receivings, the aerial velocity of propagation of electromagnetic wave is similar to the light velocity, based on the mistiming of signal, we can list system of equations, solve the position of discharge signal, and then the high-tension apparatus that generation office puts is located accurately.We just can arrange interruption maintenance by the location, and the further deterioration of avoiding equipment early ensures the high-tension apparatus safe operation of transformer station.

So we adopt a kind of transformer station's partial discharge monitoring and locating device based on the ultrahigh frequency method, reduced greatly Cost Problems, four corner A, B, C, the D place that collector employing matrix form is positioned over respectively transformer station put in four groups of uhf sensor drawn games, the zero-time of the electromagnetic wave signal that produces in four same discharge source discharge processes of uhf sensor Synchronous Receiving, based on the mistiming of signal, we list system of equations, solve the position of discharge signal, just can realize the location of discharge signal.Simultaneously, office puts collector electromagnetic wave signal is gathered storage, and data server is put collector with each innings and adopted optical fiber to be connected, and by optical fiber the data that collect is sent to data server, data server is processed by data, thus can on-line monitoring to the shelf depreciation situation of transformer station.

The utility model adopts the ultrahigh frequency method to realize transformer station's partial discharge monitoring and location, frequency band is at 300M～1500M, effectively avoided the following corona of 300M to disturb, antijamming capability is strong, easy for installation, low cost and other advantages, power industry can be widely used in, existing transformer station can be effectively solved because the problem that installation cost is high, the later maintenance workload is large.

Claims

1. transformer station's partial discharge monitoring and locating device based on a ultrahigh frequency method is characterized in that: comprise that data server (6), four offices put collector (3), four uhf sensors (2); (3) on the collector are put in uhf sensor (2) office of sticking on, adopt the long concentric cable (4) of 10cm to connect, uhf sensor (2) here is not the coupling of playing electric capacity, but receives the uhf electromagnetic wave signal with antenna; Four corner A that collector (3) employing matrix form is positioned over respectively transformer station (1) are put in four groups of uhf sensors (2) drawn game, B, C, the D place, data server (6) is positioned over transformer station's master-control room, putting collector (3) with each innings respectively adopts optical fiber (5) to be connected, by optical fiber (5) data that collect are sent to data server (6), data server (6) is processed by data, thereby can on-line monitoring to the shelf depreciation situation of transformer station, simultaneously, the aerial velocity of propagation of electromagnetic wave is similar to the light velocity, so we can adopt time difference method, can locate accurately the high-tension apparatus that generation office puts.

2. a kind of transformer station's partial discharge monitoring and locating device based on the ultrahigh frequency method according to claim 1: the frequency band of uhf sensor is in the broadband of 300M-1500MHZ.