CN101071674B - Transformer turbo driving device and method thereof - Google Patents

Abstract

A transformer turbo driving device and a method for the same are provided. A transformer turbo driving device includes a transformer temperature sensor, a panel temperature sensor, a control unit, a turbo function unit, a turbo fan drive unit, an outlet fan drive unit, and a storage unit. The transformer temperature sensor senses the temperature of the transformer insulating oil. The panel temperature sensor senses the temperature of a panel where the transformer is installed. The control unit outputs a control signal operating a turbo fan based on data obtained from the transformer temperature sensor and outputs a control signal operating a outlet fan based on data obtained from the panel temperature sensor and outputs a control signal storing the said data. The turbo functions of the turbo function unit are operated by the control signal of the control unit. The outlet fan drive unit makes the temperature and the transformer decreased by operating the turbo fan by the control signal of the turbo function unit or the control unit. The storage unit stores the temperature of the transformer or the panel by the control signal of the control unit.

Description

Transformer turbo driving device and method thereof

Technical field

The present invention relates to a kind of transformer turbo driving device and method thereof, thereby relate in particular to a kind of for preventing that the transformer temperature from sharply rising or the degradation phenomena of the transformer transformer insulated thing that long-time running causes under high load capacity, can predicting that coil temperature starts transformer turbo driving device and method thereof that turbofan reduces the transformer temperature in advance.

Background technology

In general, can produce Joule heat during by electric current in the transformer coil, thereby the transformer temperature is risen.Coil temperature is generally by being arranged on the temperature sensor measurement of insulating oil, and in secondary coil inside temperature sensor is set, and measures the transformer coil temperature, and therefore its temperature can be directly measured in the heating that causes for different load.

The transformer coil temperature of Ce Dinging and its environment temperature will influence transformer capacity like this.According to ANSI/IEEEC 57.91, for self-cooled transformer, 1 ℃ of temperature of every cooling just can increase the capacity of 1% (environment temperature is below 30 ℃) or 1.5% (environment temperature is more than 30 ℃), therefore transformer useful life can be prevented accident and prolong to cooling transformer, the capacity that can bear simultaneously increases the overload running that causes, can cut down transformer and sets up economic benefits such as expense thereby bring.

On the other hand, when temperature measurement result is higher than permissible value, will start the turbine function,, will start turbofan, transformer is cooled off if the transformer temperature continues to increase afterwards.But existing turbo driving algorithm is calculating turbine function on time T _OnThe time, if the deviation mean value S of transformer temperature _AvgFor negative, therefore institute's turbine function on time of asking also will can start turbofan for negative.

That is, existing transformer turbo driving is, by temperature deviation value a _nCondition greater than 0 and the last temperature value T that measures _nGreater than measuring temperature value T before _Tf1Condition determine to start or stop the turbine function jointly.That is, can simply represent by following formula.

If a _n＞0 or T _n＞T _Tf1, then start the turbine function.

Here, a _nBe the temperature deviation value, T _nBe to measure temperature value, T at last _Tf1Temperature when being the turbine function on.

But, can cause following problems under this situation.

As shown in Figure 1, temperature slowly increases, (real data is not easy to see when reducing suddenly then, but when importing data, may occur) owing to external disturbance, the turbine function will stop immediately, if after this temperature sharply rises, because unpredictable in 1 hour, therefore when situation takes place as shown in Figure 1 reality, can't in time carry out appropriate processing.

In addition, if further exaggerative situation shown in Figure 1 turbofan also might occur and start, and the problem that the turbine function has stopped.When this problem occurring, in that temperature is lower now, and under the also lower situation of predicted temperature, turbofan will be carried out the unnecessary running more than 1 hour at least.

Moreover, when there are 7 of temperature measuring data less thaies in the turbo driving mode in the past, can't start the problem of turbine function.This explanation can't be tackled emergency, runs counter to the flexibility and the certainty of turbo driving algorithm.

In addition, under the state that starts the turbine function, if temperature continues to reduce bit by bit, the turbine function such as will interim ground starts and stops repeatedly at misoperation.

Summary of the invention

The present invention proposes for overcoming above-mentioned prior art problems and making it can bear the overload running, transformer turbo driving device and the method thereof of providing is provided, by prediction transformer coil temperature, start turbofan in advance, when guaranteeing that transformer insulated thing temperature can not rise to more than the permissible value, obtaining the short time increases the effect of transformer capacity.

The composition of the transformer turbo driving device that the present invention relates to that proposes comprises for achieving the above object: the transformer temperature sensor is used to survey transformer insulated oil temperature; The dashboard temperature sensor is used to survey the dashboard temperature that above-mentioned transformer is installed; Control part, based on the data that obtain from above-mentioned transformer temperature sensor, the control signal that output is used to start the control signal of turbine function portion or is used to start the turbofan drive division, and based on the data that obtain from above-mentioned dashboard temperature sensor, output is used to start the control signal of ventilating fan drive division, and output is used to store the control signal of transformer temperature data or dashboard temperature data; Turbine function portion according to the above-mentioned control signal that is used to start turbine function portion, starts the turbine function that is used to control described turbofan drive division; The turbofan drive division according to above-mentioned control signal or the above-mentioned control signal that is used to start turbine function portion that is used to start the turbofan drive division, starts turbofan; The ventilating fan drive division according to the above-mentioned control signal that is used to start the ventilating fan drive division, starts ventilating fan; Storage part according to the above-mentioned control signal that is used to store transformer temperature data or dashboard temperature data, stores transformer temperature or dashboard temperature.

Above-mentioned control part, the temperature that records at the transformer temperature sensor is the first set point of temperature T _TfWhen above, output is used to start the control signal of turbine function portion, surpasses than the above-mentioned first set point of temperature T in temperature _TfThe second also high set point of temperature T _AcWhen above, output is used to start the control signal of turbofan drive division.

In addition, above-mentioned control part is an assigned temperature (40 ℃) when above in the dashboard temperature, and output is used to start the control signal of ventilating fan drive division.

In addition, the temperature that records at the transformer temperature sensor of above-mentioned turbine function portion is the first set point of temperature T _TfStart when above, the while is algorithm predicts transformer temperature in future according to the rules, and output is used to start the control signal of turbofan.

On the other hand, can also when temperature surpasses rated temperature, the transformer heat outwards be discharged rapidly at the inner heat pipe of installing of transformer.That is, when temperature sharply rises in the unit interval, can in 180 seconds, discharge the heat in the transformer rapidly, thereby prevent the scaling loss that the insulating oil deterioration causes.

In addition, above-mentioned algorithm to the temperature data of collecting be 1 hour be data conditions after 1 hour with interior data conditions and the temperature data collected, predict transformer temperature in the future with distinct methods respectively.

If the transformer temperature data of collecting is 1 hour during with interior data, above-mentioned algorithm (or the transformer turbo driving method that the present invention relates to) comprises following four steps:

The step of coming accounting temperature deviation mean value according to following formula 1;

[formula 1]

$S_{\mathrm{avg}}=\frac{\underset{k=1}{\overset{n}{Q}}(T_{k+1}-T_k)}{\mathrm{nE\&Delta;t}},n<7$

(here, n is the number of times that the turbine function on is stored data later on, S _AvgBe the average deviation in the storage time)

Calculate the step of turbofan start-up temperature according to following formula 2;

[formula 2]

${T^{\&prime;}}_{\mathrm{ac}}=T_n+n\frac{(T_{\mathrm{ac}}-T_n)}{6}$

(T ' here, _AcBe and 1 hour maximum permissible temperature) with interior each sample time of corresponding insulant

Calculate 1 hour with interior arrival turbofan start-up temperature T ' according to following formula 3 _AcThe step of required time;

[formula 3]

$T_{\mathrm{on}}=\frac{{T^{\&prime;}}_{\mathrm{ac}}-T_n}{S_{\mathrm{avg}}}$

According to following formula 4, if M＜0, then output is used to start the control signal of turbofan drive division, if M＞0, then output is used to stop the step of the control signal of turbofan drive division.

[formula 4]

M＝nEΔt-T _on

In addition, if when the transformer temperature data of collecting is 1 hour later data, above-mentioned algorithm (or the transformer turbo driving method that the present invention relates to) comprises following three steps:

The step of coming accounting temperature deviation mean value according to following formula 5;

[formula 5]

$S_{\mathrm{avg}}=\frac{\underset{k=1}{\overset{7}{Q}}(T_{k+1}-T_k)}{6\mathrm{E\&Delta;t}}$

(S here, _AvgBe the 1 hourly average deviation that stores)

Calculate the turbofan step of start-up time according to following formula 6;

[formula 6]

$T_{\mathrm{on}}=\frac{T_{\mathrm{ac}}-T_n}{S_{\mathrm{avg}}}$

According to following formula 7, if M＜0, then output is used to start the control signal of turbofan drive division, if M＞0, then output is used to stop the step of the control signal of turbofan drive division.

[formula 7]

M＝3600-T _on

Pass through said structure, turbo driving device that the present invention relates to and method thereof, monitoring transformer temperature, dashboard temperature etc., and store these data, algorithm predicts transformer temperature in the future according to the rules again, therefore can start turbofan in advance, guarantee that the transformer temperature can not rise to more than the allowable temperature, thereby realize reducing the turbo driving algorithm of transformer temperature.

Above-mentioned transformer coil temperature and its environment temperature (dashboard temperature) will influence transformer capacity.According to ANSI/IEEEC 57.91, for self-cooled transformer, 1 ℃ of temperature of every cooling just can increase the capacity of 1% (environment temperature is below 30 ℃) or 1.5% (environment temperature is more than 30 ℃), therefore transformer useful life can be prevented accident and prolong to cooling transformer, the capacity that can bear simultaneously increases the overload running that causes, can cut down transformer and sets up economic benefits such as expense thereby bring.

Fig. 1 is the curve of the time dependent example of transformer temperature that is used to illustrate the shortcoming of existing transformer turbo driving method;

Fig. 2 is the module map that the transformer turbo driving device that the present invention relates to is formed structure;

Fig. 3 is explanation 1 hour algorithm curve with the data of interior collection of transformer turbo driving device to the present invention relates to;

Fig. 4 is the algorithm curve that the data that the transformer turbo driving device that the present invention relates to was collected later in 1 hour are described;

Fig. 5 is the flow chart of the transformer turbo driving method that the present invention relates to of expression.

The reference numeral explanation

100: the transformer turbo driving device that the present invention relates to

110: transformer temperature sensor 120: the dashboard temperature sensor

130: control part 140: turbine function portion

150: turbofan drive division 160: the ventilating fan drive division

170: storage part

With reference to the accompanying drawings, the preferred embodiment for the present invention is elaborated, guarantees that the personnel with the technical field of the invention relevant knowledge can implement the present invention easily.

Fig. 2 is the module map that the transformer turbo driving device that the present invention relates to of expression is formed structure.

As shown in the figure, the transformer turbo driving device 100 that the present invention relates to comprises: transformer temperature sensor 110, dashboard temperature sensor 120, control part 130, turbine function portion 140, turbofan drive division 150, ventilating fan drive division 160 and storage part 170.

Above-mentioned transformer temperature sensor 110 is used to survey the transformer temperature, and is to output to control part 130 behind the signal of telecommunication with the temperature transition that detects.

Above-mentioned dashboard temperature sensor 120 is used to survey the dashboard temperature that transformer is installed, and is to output to control part 130 behind the signal of telecommunication with the temperature transition that detects.

Above-mentioned control part 130 is based on the data that obtain from transformer temperature sensor 110, and output is used to start the control signal of turbofan.In addition, above-mentioned control part 130 is also based on the data that obtain from dashboard temperature sensor 120, and output is used to start the control signal of ventilating fan.Simultaneously, also to export transformer temperature or dashboard temperature transition be the control signal that specified data is stored to above-mentioned control part 130.

Above-mentioned turbine function portion 140 starts the turbine function according to the control signal of control part 130, and this turbine function portion 140 is built-in with the regulation algorithm routine that the back will illustrate, can predict the transformer temperature, so can start turbofan.

Above-mentioned turbofan drive division 150 starts turbofan according to the control signal of above-mentioned control part 130 or turbine function portion 140, and the transformer temperature is descended.That is, the present invention directly drives turbofan by control part 130, or drives by the algorithm routine of turbine function portion 140.

Above-mentioned ventilating fan drive division 160 starts ventilating fan according to the control signal of control part 130, and the transformer temperature is descended.

Above-mentioned storage part 170 stores transformer temperature or dashboard temperature according to the control signal of control part 130.

An example that has shown the transformer turbo driving algorithm in the table 1.

Table 1

On the other hand, above-mentioned control part 130, the temperature that records at transformer temperature sensor 110 is set point of temperature T _TfWhen above, output is used to start the control signal of turbine function portion 140, surpasses than said temperature T in temperature _TfAlso high set point of temperature T _AcWhen above, output is used to start the control signal of turbofan drive division 150.In addition, above-mentioned control part 130 is an assigned temperature (40 ℃) when above in the dashboard temperature, and output is used to start the control signal of ventilating fan drive division 160.

Maximum permissible temperature, transformer temperature, the turbine function temperature T of the different insulative thing correspondence of inflow transformer have been provided in the table 2 _TfAn example.As shown in table 2, the transformer temperature is a turbine function on temperature T _TfWhen above, will start the turbine function.Here, above-mentioned turbine function on temperature T _TfCan probably be taken as 1/2 (that is T, of transformer temperature _Tf=T _Ac/ 2).

Table 2

T 1

105

120

130

155

180

IEC?76

Wherein, T _TfFor turbine function on temperature [℃], T _TacFor the maximum permissible temperature calculated value of considering mean temperature etc. [℃], T _TopFor the transformer temperature that derives from maximum permissible temperature [℃], T ₁For the insulant maximum permissible temperature [℃], t _TonFor turbofan starts [second] constantly.

Here, to the transformer temperature T _TopWith maximum permissible temperature T ₁Between relation further specify.In fact the maximum permissible temperature that flow into the insulating oil of transformer can't be surveyed, and therefore derives by measuring the transformer temperature.As mentioned above, the transformer temperature can be surveyed by transformer temperature sensor 110, as an example, can use the PT100 thermometer to measure.

Above-mentioned transformer temperature T _TopCan try to achieve by following formula.

T _top＝T ₁-T _tad-T _ah

For example, for category-A insulant, T _Top=105-10-5=90 ℃

Wherein, T _TadFor the deviation between transformer temperature and the coil mean temperature,, get 10 ℃ (insulant A, E classes) for oil-immersed type transformer; T _AhFor the deviation between rated load lower coil mean temperature and the maximum temperature,, get 5 ℃ (insulant A, E classes) for oil-immersed type transformer.

As mentioned above, the temperature that records at transformer temperature sensor 110 of turbine function of the present invention portion 140 is set point of temperature T _TfStart when above, by regulation algorithm predicts transformer temperature in the future, output is used to start the control signal of above-mentioned turbofan simultaneously.

Here, above-mentioned algorithm to the temperature data collected 1 hour with interior and 1 hour later situation, predict the temperature in future of transformer respectively with distinct methods.

Fig. 3 is explanation 1 hour algorithm curve with the data of interior collection of transformer turbo driving device to the present invention relates to.

In the curve shown in Figure 3, be used to predict that turbo driving straight line formula constantly can represent by following formula.

T＝at+b

Here, only can't obtain deviation, therefore need to store T by 1 data _Tf1, then with T _Tf1For benchmark stores higher temperature, obtain deviation.But,, need maintain the statusquo so can the deviation storage value if deviation is 0.The deviate that stores can be represented by following formula.

$a_n=\frac{T_{\mathrm{tfn}+1}-T_{\mathrm{tfn}}}{t_{n+1}-t_n}$

Utilization is by a of each step of following formula calculating _nObtain the average deviation value.

In order to predict 1 hour later transformer temperature, need use over data (T in 1 hour _Tf1～T _Tf7, totally 7), collected before these data, can only predict according to collecting data.That is, with 1 hour be benchmark, be divided into before the data collection and collect latter two processing procedure.

In order to predict situation after 1 hour, need to use with the present moment is temperature data (totally 7 data) in past 1 hour of benchmark, with 1 hour later transformer temperature of the data prediction below 7, will not have credibility.Therefore, can only predict with the corresponding time of collected data till the transformer temperature.

Here, with reference to Fig. 5, transformer turbo driving device and the method thereof that the present invention relates to described.

At first, for 1 hour with interior condition under predicted temperature, a that utilization is tried to achieve above _nObtain the average deviation value by following formula 1.

[formula 1]

$S_{\mathrm{avg}}=\frac{\underset{k=1}{\overset{n}{Q}}(T_{k+1}-T_k)}{\mathrm{nE\&Delta;t}}$

(here, n is the number of times that the turbine function on is stored data later on.The S that tries to achieve _AvgBe the average deviation value in the storage time)

Simultaneously, obtain the turbofan start-up temperature of predicted time by formula 2.

[formula 2]

${T^{\&prime;}}_{\mathrm{ac}}=T_n+n\frac{(T_{\mathrm{ac}}-T_n)}{6}$

(T ' here, _AcBe and 1 hour maximum permissible temperature) with corresponding insulant of each interior sample time

In addition, n is identical with n in the above-mentioned formula 1.T ' during n=0 _Ac=T _n, T ' during n=6 _Ac=T _Ac

The T ' that utilization is tried to achieve _AcAnd S _Avg, bring formula 3 into, can obtain the arrival turbofan start-up temperature T ' in 1 hour _AcThe required time.

[formula 3]

$T_{\mathrm{on}}=\frac{{T^{\&prime;}}_{\mathrm{ac}}-T_n}{S_{\mathrm{avg}}}$

(the T that tries to achieve here _OnWith prediction constantly the difference of turbofan n start-up time Δ t be the surplus of present moment, with its quantification, can be expressed as formula 4.)

[formula 4]

M＝nEΔt-T _on

Here, if M＜0, then the output of turbine function portion is used to start the control signal of turbofan drive division, if M＞0, then output is used to stop the control signal of turbofan drive division.

But, if T _OnBe negative, the M value does not have influence to the startup/shut-down operation of turbofan, but will lose the meaning of surplus.If so T _OnBe negative, only need to differentiate its symbol for the M value.

Then, be 1 hour later data situation to the temperature data of collecting, its algorithm is described.

After having collected 7 data, predicted time is 1 hour, so n is fixed as 6 in the above steps, and the turbo driving predicted temperature of formula 2 also will be fixed as T _Ac

Below formula 5 and formula 6 represent deviation that forecasting institute needs and turbofan start-up time respectively.

[formula 5]

$S_{\mathrm{avg}}=\frac{\underset{k=1}{\overset{7}{Q}}(T_{k+1}-T_k)}{6\mathrm{E\&Delta;t}}$

[formula 6]

$T_{\mathrm{on}}=\frac{T_{\mathrm{ac}}-T_7}{S_{\mathrm{avg}}}$

With top identical, T _OnWith prediction constantly the difference of turbofan start-up time (3600 seconds) be the surplus of present moment, can be by formula 7 expressions.

[formula 7]

M＝3600-T _on

Utilize formula 7, can calculate from present moment and arrive T in 1 hour later on _AcSurplus between the required time, if M＜0, then the output of turbine function portion is used to start the control signal of turbofan drive division, if M＞0, then output is used to stop the control signal of turbofan drive division.

With top identical, if T _OnBe negative, the M value will be carried out the startup/shut-down operation of normal turbofan, but lose the meaning of surplus, if so T _OnBe negative, only need to differentiate its symbol for the M value.Satisfy T＞T _TfCondition the time, will start the turbine function after the 1st step (10 minutes), after this will judge whether to start turbofan according to the variation of past data accounting temperature.

Flow process 1 is that the temperature data collected is the treatment step in 1 hour the time among Fig. 5, and flow process 2 is that the temperature data collected is the treatment step after 1 hour the time.

The invention effect

As mentioned above, turbo driving device that the present invention relates to and method thereof, can monitor transformer temperature, dashboard temperature etc., and store these data, again according to certain algorithm predicts transformer temperature in future, start turbofan in advance, guarantee that the transformer temperature can not rise to more than the allowable temperature, thereby realize reducing the turbo driving algorithm of transformer temperature.

By the turbo driving algorithm, can prevent that the insulant degradation phenomena from quickening and temperature sharply increases the accident that causes, can carry out safe overload running simultaneously at short notice, thereby play the effect that increases transformer capacity.

More than explanation only is the transformer turbo driving device that the present invention relates to and an embodiment of method thereof, the present invention is not limited to the foregoing description, as described in claims, under the situation that does not break away from main idea of the present invention, personnel with field of the present invention relevant knowledge can carry out various deformation, must belong to claim scope of the present invention.

Claims (4)

1. a transformer turbo driving device is characterized in that, described device comprises:

The transformer temperature sensor is used to survey the insulating oil temperature of transformer;

The dashboard temperature sensor is used to survey the dashboard temperature that described transformer is installed;

Control part, based on the data that obtain from described transformer temperature sensor, the control signal that output is used to start the control signal of turbine function portion or is used to start the turbofan drive division, based on the data that obtain from described dashboard temperature sensor, output is used to start the control signal of ventilating fan drive division, and output is used to store the control signal of transformer temperature data or dashboard temperature data;

Turbine function portion according to the described control signal that is used to start turbine function portion, starts the turbine function that is used to control described turbofan drive division;

The turbofan drive division according to described control signal or the described control signal that is used to start turbine function portion that is used to start the turbofan drive division, starts turbofan;

The ventilating fan drive division according to the described control signal that is used to start the ventilating fan drive division, starts ventilating fan;

Storage part according to the described control signal that is used to store transformer temperature data or dashboard temperature data, stores transformer temperature or dashboard temperature.

2. transformer turbo driving device as claimed in claim 1, it is characterized in that, the temperature that described control part records at the transformer temperature sensor is the described control signal that is used to start turbine function portion of the above time output of first set point of temperature, when temperature surpassed than also high second set point of temperature of described first set point of temperature, output was used to start the control signal of turbofan drive division afterwards.

3. transformer turbo driving device as claimed in claim 1 is characterized in that, described control part is the described control signal that is used to start the ventilating fan drive division of the above time output of assigned temperature in the dashboard temperature.

4. transformer turbo driving device as claimed in claim 1, it is characterized in that, the temperature that described turbine function portion records at the transformer temperature sensor is that first set point of temperature starts when above, while is algorithm predicts transformer temperature in future according to the rules, output is used to start the control signal of described turbofan drive division

Wherein said regulation algorithm to the temperature data of collecting be 1 hour be data conditions after 1 hour with interior data conditions and the temperature data collected, predict transformer temperature in the future with distinct methods respectively.

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