CN202094698U

CN202094698U - Intelligent transformer monitoring equipment

Info

Publication number: CN202094698U
Application number: CN2011200076411U
Authority: CN
Inventors: 张牧; 高圣伟; 张冠军; 郭文成; 王炜; 袁臣虎; 陶宇; 李猛; 孟增垂; 魏强; 杨恺; 贾非
Original assignee: Tianjin Polytechnic University
Current assignee: Tiangong University
Priority date: 2011-01-12
Filing date: 2011-01-12
Publication date: 2011-12-28
Anticipated expiration: 2021-01-12

Abstract

The utility model discloses intelligent transformer monitoring equipment, which comprises a machine cabinet, a voltage, current and bushing insulation measurement IED (intelligent electronic device), a basic parameter measurement IED, a cooler device monitoring IED and a power box for the IEDs, wherein the machine cabinet is used for holding the devices and the power box; the voltage, current and bushing insulation measurement IED is used for measuring effective values of operating voltage, load current, bushing end shield current and neutral point current and is responsible for calculating electric power parameters such as power factors, medium loss, harmonic content, harmonic distortion ratio and the like; the basic parameter measurement IED is used for monitoring digital and analog quantity such as light and heavy gas and content thereof, a pressure relief valve, a tap switch position, switch oil level, iron core grounding current, temperature and humidity in the machine cabinet and the like; the cooler monitoring IED is used for monitoring digital and analog quantity such as cooling state, winding temperature, top oil temperature, bottom oil temperature, ambient temperature and humidity and the like; and the power box for the IEDs is used for providing +/-5V, +/-12V and +/-24V voltage-stabilizing power sources for the three IEDs. The intelligent transformer monitoring equipment is abundant in functions and simple and easy in use by the aid of modular design conception and has higher applicability and bright developing prospect.

Description

A kind of intelligent transformer watch-dog

Technical field

The utility model relates to a kind of watch-dog, it is complete to be particularly related to a kind of monitoring function, easy to use, modular construction, the transformer in the electric power system that can be online is monitored in real time and is controlled, can gather the waveform of voltage, electric current, the end screen electric current etc. of power transformer, calculate its effective value, and carry out further signal analysis, draw parameters such as power factor, dielectric loss, harmonic content, aberration rate, can monitor a kind of intelligent transformer watch-dog of the operating state at positions such as transformer body, conservator, shunting switch, cooling device simultaneously.

Background technology

In the period of since the founding of New 60, the power industry of China has obtained development rapidly, is increasing with the speed more than 10% every year on average.To latter stage in 20th century, China's electric power is supplied with problem in short supply and is eased finally.But the mitigation of pressure can not solve the problem of a lot of essence, and the electricity consumption level of China is still very low.500kV and higher levels of EHV transmission rack really do not form in most of electrical network as yet, the safety of electrical network is poor, reliability is low, automatization level is not high, the peak load regulation network off-capacity, loss is big, and power supply quality is poor, can not adapt to the requirement of information age 21 century to the quality and quantity of electric power supply far away.

After entering 21 century, in order to cooperate STRATEGIES OF SUSTAINABLE DEVELOPMENT thought, accept the challenge of interior power system reform of global range and technological innovation simultaneously, power industry is constantly adjusted in technology, management, has still kept higher development speed and bigger scale.Till 2009,87,407 ten thousand kilowatts of national generating equipment capacities increase by 10.23% on a year-on-year basis, nationwide integrated power grid 220kV and above transmission line loop length 39.97 ten thousand kms increase by 11.38% on a year-on-year basis, wherein, 500kV line loop length is 12.19 ten thousand kms, increases by 12.85% on a year-on-year basis; 16.51 hundred million kilovolt-amperes of 220 kilovolts of nationwide integrated power grids and above public change place capacities increase by 17.09% on a year-on-year basis, and wherein the public change place capacity of 500kV increases by 19.44% on a year-on-year basis into 6.28 hundred million kilovolt-amperes.Close down 2,617 ten thousand kilowatts of little fired power generating unit capacity the whole year through examining in 2009, Eleventh Five-Year Plan is closed down little thermoelectricity task and is fulfiled ahead of schedule.

The big-and-middle-sized transformer of power transformer, particularly 110kV and above electric pressure is the nucleus equipment of project of transmitting and converting electricity and transformer station.Its safe operation and quality condition always receive the concern of power department.Formation along with the appearance of high voltage, big unit and Da Qu networking, transferring electricity from the west to the east general layout, the integrity problem of power transformer seems and becomes increasingly conspicuous, a high-power transformer accident, often cause electric grid large area, have a power failure for a long time, and, bring inconvenience to run unit owing to repairing efficiency length, transportation tonnage heavily wait reason.With the whole nation statistics to the above system of 220kV in 2009 was example, the accident of the unplanned idle time＞1000h of power transformer just has 5 times, far above developed country, it is annual that totally unplanned idle time reaches 20933 hours, account for whole unplanned more than 70% of total time of stoppage in transit, as seen the unplanned idle time that causes because of power transformer very many, the power transformer accident has become one of principal element that influences the electrical network reliability service.

From in recent years power transformer equipment operation situation and accident statistics report analysis as can be seen, the accident quantity of 110kV transformer is more, but because its quantity in electrical network is more, so rate of failure is not very high, what comparatively speaking, rate of failure was the highest is the 330kV transformer; If by the Accident of Transformer capacity, then the 220kV transformer accounts for about 5 one-tenth of accident capacity.From the time time limit, the preceding ratio that had an accident in 5 years is bigger, above 5 one-tenth.

Along with the continuous lifting of generating set installed capacity, the transformer equipment in the electrical network is more and more, and fast-developing is not only for distribution technique, and the detection of electrical network and resist technology are also in continuous progress.Under the prerequisite that improves power transformer security of operation and reliability, how to accomplish that the real-time monitoring of electrical network and transformer operating state and protection are the major issues that power industry faces.The continuous application of microelectronics and microcontroller brings a lot of progress to observation and control technology, and traditional detection technique drawback is heavy, can not adapt to current a lot of production requirements, so online measuring technique is best suited in the technology of transformer detection.

Carry out the charged on-line monitoring of power transformer, can monitor voltage, current effective value under the power transformer running status at any time, power factor, dielectric loss, key parameter such as harmonic content, aberration rate, self-condition, the working condition of timely understanding equipment, and the operational environment variation of monitoring equipment etc., thereby reliability of operation improved.

Based on above principle, the utility model proposes a kind of feature richness, simplicity of design, modular construction can be monitored working voltage, the load current effective value of power transformer, power factor, dielectric loss angle, harmonic wave, percent harmonic distortion, transformer oil level, gas bearing capacity, a kind of power transformer monitoring system of series of parameters such as operating temperature, for grasping power transformer real-time working state, guarantee power transformer safe and reliable operation is offered help.

Summary of the invention

Technical problem to be solved in the utility model is, a kind of feature richness, power transformer comprehensively monitoring equipment modular, simple in structure have been proposed, can monitor working voltage, the load current effective value of power transformer, power factor, dielectric loss angle, harmonic wave, percent harmonic distortion, the transformer oil level, gas bearing capacity, parameters such as operating temperature.

The technical scheme that the utility model adopted is: a kind of intelligent transformer watch-dog, include rack, also be provided with: electric current and voltage and sleeve pipe insulation measurement IED are used to monitor working voltage, the load current of power transformer and calculate acquisition sleeve pipe insulation parameter; Basic parameter is measured IED, is used to monitor the position of fuel level in tank, internal temperature, gas state and on-load voltage regulating switch; Cooling device is monitored IED, is used to monitor the running status of cooling fan; The IED power supply box, being used for electric current and voltage and sleeve pipe insulation measurement IED, basic parameter measurement IED and cooling device monitoring IED operate as normal provides stable power.

Described electric current and voltage and sleeve pipe insulation measurement IED, it is characterized in that, comprise a power supply indicator on the front panel, a run indicator, comprise the ARM debugging interface on the rear board, the DSP debugging interface, Ethernet interface, voltage signal input interface, the current signal input interface, end screen current signal input interface, the neutral point signal input interface, and with the continuous power interface of the IED1 power supply outlet on the power supply box.

Described basic parameter is measured IED; it is characterized in that; comprise a power supply indicator on the front panel; a run indicator; comprise the equipment debugging interface on the rear board; Ethernet interface; be used to monitor light and heavy gas bound state; pressure relief valve state and quick-frozen oil pressure relay state of switch amount 1 interface; be used for monitoring and decompose the switch gear; main body fuel tank upper limit state of switch amount 2 interfaces; be used to monitor main body fuel tank lower limit state; the switch protection relay status; switch oil level bound state of switch amount 3 interfaces; be used to monitor light gas bearing capacity; bulk oil fuel level in tank height; the switch level height; iron core node current effective value; temperature in clamp earthing current and the rack; the analog quantity interface of humidity, and with the continuous power interface of the IED2 power supply outlet on the power supply box.

Described cooling device monitoring IED case, it is characterized in that, comprise a power supply indicator on the front panel, a run indicator comprises the equipment debugging interface, Ethernet interface on the rear board, be used to monitor cooler state of switch amount 1 interface and switching value 2 interfaces, be used for switching value 3 interfaces that cooler is controlled, be used to monitor the analog quantity interface of top-oil temperature, bottom oil temperature, winding temperature and ambient temperature, humidity, and with the continuous power interface of the IED3 power supply outlet on the power supply box.

Described IED power supply box, it is characterized in that, comprise on the front panel that connecting general supply for one is bright power supply indicator, the left side is the IED1 mains switch from top to down successively, the IED2 mains switch, the IED3 mains switch, rear board comprises three fans that are used for dispelling the heat, IED1 power supply outlet, IED2 power supply outlet, IED3 power supply outlet, and power supply box power interface.

The utility model is that the real time and on line monitoring at power transformer requires the Intellectualized monitoring equipment that designs, the parameter of required monitoring and state are analyzed and sorted out, and, design the above-mentioned complete supervising device of a cover based on function modoularization, incorporate mentality of designing.By being used of multiple sensing device, the parameter of the power transformer of required monitoring is converted into the interface that the signal of telecommunication inserts corresponding IED, through processes such as collection, processing, calculating and analyses, IED equipment is made corresponding FEEDBACK CONTROL or communication operation.This system, diverse in function, the parameter of monitoring is abundant, adopts modular construction, uses convenient and simplely, is to grasp power transformer real-time working state, and guarantee power transformer safe and reliable operation is offered help.

Description of drawings

Fig. 1 is an intelligent transformer watch-dog front view;

Fig. 2 is an intelligent transformer watch-dog rearview;

Fig. 3 is transformer body and intelligent monitoring device wiring schematic diagram;

Fig. 4 is transformer body end screen electric current and intelligent monitoring device wiring schematic diagram;

Wherein:

1: rack

2: electric current and voltage and sleeve pipe insulation measurement IED

3: basic parameter IED

4: cooling device monitoring IED

The 5:IED power supply box

20: power supply indicator 40: power supply indicator

21: run indicator 41: run indicator

22:ARM debugging interface 42: debugging interface

23:DSP debugging interface 43: Ethernet interface

24: Ethernet interface 44: switching value 1 interface

25: voltage signal input interface 45: switching value 2 interfaces

26: current signal input interface 46: switching value 3 interfaces

27: end screen current signal input interface 47: analog quantity interface

28: neutral point signal input interface 48: power interface

29: power interface 50: power supply indicator

30: power supply indicator 51:IED1 mains switch

31: run indicator 52:IED2 mains switch

32: debugging interface 53:IED3 mains switch

33: Ethernet interface 54: fan

34: switching value 1 interface 55:IED1 power outlet

35: switching value 2 interface 56:IED2 power outlets

36: switching value 3 interface 57:IED3 power outlets

37: analog quantity interface 58: the power supply box power interface

Embodiment

38: power interface

Below in conjunction with embodiment and accompanying drawing a kind of intelligent transformer watch-dog of the present utility model is made detailed explanation.

As shown in Figure 1, a kind of intelligent transformer watch-dog includes rack 1, also is provided with: electric current and voltage and sleeve pipe insulation measurement IED2 are used to monitor working voltage, the load current of power transformer and calculate acquisition sleeve pipe insulation parameter; Basic parameter is measured IED3, is used to monitor the position of fuel level in tank, internal temperature, gas state and on-load voltage regulating switch; Cooling device is monitored IED4, is used to monitor the running status of cooling fan; IED power supply box 5, being used for electric current and voltage and sleeve pipe insulation measurement IED2, basic parameter measurement IED3 and cooling device monitoring IED4 operate as normal provides stable power.

As shown in Figure 1, described electric current and voltage and sleeve pipe insulation measurement IED2 comprise 20, one run indicator 21 of a power supply indicator on the front panel.

As shown in Figure 2, described electric current and voltage and sleeve pipe insulation measurement IED2, comprise ARM debugging interface 22 on the rear board, DSP debugging interface 23, Ethernet interface 24, voltage signal input interface 25, current signal input interface 26, end screen current signal input interface 27, neutral point signal input interface 28, and the power interface 29 that links to each other with the IED1 power supply outlet on the power supply box 55.

As shown in Figure 1, described basic parameter is measured IED3, comprises 30, one run indicator 31 of a power supply indicator on the front panel.

As shown in Figure 2; described basic parameter is measured IED3; comprise equipment debugging interface 32 on the rear board; Ethernet interface 33; be used to monitor light and heavy gas bound state; pressure relief valve state and quick-frozen oil pressure relay state of switch amount 1 interface 34; be used for monitoring and decompose the switch gear; main body fuel tank upper limit state of switch amount 2 interfaces 35; be used to monitor main body fuel tank lower limit state; the switch protection relay status; switch oil level bound state of switch amount 3 interfaces 36; be used to monitor light gas bearing capacity; bulk oil fuel level in tank height; the switch level height; iron core node current effective value; temperature in clamp earthing current and the rack; the analog quantity interface 37 of humidity, and the power interface 38 that links to each other with the IED2 power supply outlet on the power supply box 56.

As shown in Figure 1, described cooling device monitoring IED case 4 comprises 40, one run indicator 41 of a power supply indicator on the front panel.

As shown in Figure 2, described cooling device monitoring IED case 4, comprise equipment debugging interface 42 on the rear board, Ethernet interface 43, be used to monitor cooler state of switch amount 1 interface 44 and switching value 2 interfaces 45, switching value 3 interfaces 46 that are used for cooler control are used to monitor the analog quantity interface 47 of top-oil temperature, bottom oil temperature, winding temperature and ambient temperature, humidity, and the power interface 48 that links to each other with the IED3 power supply outlet on the power supply box 57.

As shown in Figure 1, described IED comprises a power supply indicator 50, IED1 mains switch 51, IED2 mains switch 52, IED3 mains switch 53 with power supply box 5 on the front panel.

As shown in Figure 2, described IED power supply box 5, rear board comprises three fans that are used for dispelling the heat 54, IED1 power supply outlet 55, IED2 power supply outlet 56, IED3 power supply outlet 57, and power supply box power interface 58.

As shown in Figure 3, high pressure A, the B of power transformer, C three-phase and middle pressure Am, Bm, Cm three-phase are drawn from transformer body through Hall, be converted to the voltage signal of 0～5V through Hall element, all signals are summarised in together with D type interface, are connected to the voltage signal input interface 25 on electric current and voltage and the sleeve pipe insulation measurement IED2 rear board.In like manner current signal also is to be converted into 0～5V corresponding voltage through Hall element, is connected to current signal input interface 26 with D type interface.High pressure neutral point current and middle pressure neutral point current are received neutral point current input interface 28 through same conversion.

As shown in Figure 4, bushing end screen electric current and medium-tension bushing end screen electric current are received end screen electric current input interface 27 through the voltage signal that Hall element is converted to 0～5V.

A kind of intelligent transformer watch-dog of the present utility model, be that real time and on line monitoring at power transformer requires the Intellectualized monitoring equipment that designs, the parameter of required monitoring and state are analyzed and sorted out, and, design the above-mentioned complete watch-dog of a cover based on function modoularization, incorporate mentality of designing.By being used of multiple sensing device, the parameter of the power transformer of required monitoring is converted into the interface that the signal of telecommunication inserts corresponding IED, through processes such as collection, processing, calculating and analyses, IED equipment is made corresponding FEEDBACK CONTROL or communication operation.The parameter of this system monitoring is abundant, adopts modular construction, uses convenient and simplely, is to grasp power transformer real-time working state, and guarantee power transformer safe and reliable operation is offered help.

Claims

1. An intelligent transformer monitoring device, comprising an organic cabinet (1), is characterized in that it is also provided with: a voltage, current and bushing insulation measurement IED (2), which is used to monitor the operating voltage and load current of the power transformer and calculate and obtain Bushing insulation parameters; basic parameter measurement IED (3), used to monitor the oil level of the fuel tank, internal temperature, gas status and the position of the on-load tap changer; cooling device monitoring IED (4), used to monitor the operating status of the cooling fan The power supply box (5) for the IED is used to provide a stable power supply for voltage, current and bushing insulation measurement IED (2), basic parameter measurement IED (3) and cooling device monitoring IED (4).

2. A kind of intelligent transformer monitoring equipment according to claim 1, is characterized in that, the front panel of described voltage current and bushing insulation measurement IED (2) comprises a power supply indicator light (20), an operation instruction Light (21), the rear panel includes ARM debugging interface (22), DSP debugging interface (23), Ethernet port (24), voltage signal input interface (25), current signal input interface (26), last screen current signal Input interface (27), neutral point signal input interface (28), and the power interface (29) that links to each other with the IED1 power outlet (55) on the power box.

3. A kind of intelligent transformer monitoring equipment according to claim 1, is characterized in that, the front panel of described basic parameter measurement IED (3) comprises a power indicator light (30), a running indicator light (31) , the rear panel includes a device debugging interface (32), an Ethernet port (33), and a switching value 1 interface (34) for monitoring the upper and lower limit states of light and heavy gas, the state of the pressure release valve, and the state of the quick-freezing oil pressure relay. Disassemble the switch position, the switching value 2 interface (35) of the upper limit state of the main oil tank, which is used to monitor the lower limit state of the main fuel tank, the switch protection relay state, and the switching value 3 interface (36) of the upper and lower limit state of the switch oil level, which is used to monitor the light Analog interface (37) for gas content, oil level of the main oil tank, oil level of the switch, effective value of iron core node current, clamp grounding current, temperature and humidity in the cabinet, and the same IED2 power outlet on the power box (56) connected power supply interface (38).

4. A kind of intelligent transformer monitoring equipment according to claim 1, is characterized in that, the front panel of described cooling device monitoring IED box (4) comprises a power indicator light (40), a running indicator light (41 ), the rear panel includes a device debugging interface (42), an Ethernet port (43), a switch 1 interface (44) and a switch 2 interface (45) for monitoring the state of the cooler, and a switch for cooler control Quantity 3 interface (46), the analog quantity interface (47) used to monitor the top oil temperature, bottom oil temperature, winding temperature and ambient temperature, humidity, and the power interface connected with the IED3 power outlet (57) on the power box (48).

5. A kind of intelligent transformer monitoring equipment according to claim 1, is characterized in that, described IED comprises a power indicator light (50), IED1 power switch (51) on the front panel of described IED power box (5), IED2 power switch (52), IED3 power switch (53), rear panel includes three fans (54) for cooling, IED1 power outlet (55), IED2 power outlet (56), IED3 power outlet (57) ), and the power supply interface (58) of the power box. the