RU67274U1 - DEVICE FOR DETERMINING THE PARAMETERS OF A LINEAR CURRENT-LIMITING REACTOR / RESISTOR - Google Patents

Abstract

The utility model relates to the field of information processing systems and can be used for functional control and diagnosis of a linear current-limiting reactor / resistor based on its model. The technical result is the creation of a device for determining the parameters of a linear current-limiting reactor / resistor with its longitudinal and transverse inclusion. A device for determining the parameters of a linear current-limiting reactor / resistor contains a block for calculating the active resistance R and inductance L connected via an emergency recorder to a linear current-limiting reactor / resistor in the places of its connection to the generator voltage buses. In the calculation unit R, L, the first and second sampling and storage devices are connected to the emergency recorder, and the inverter and the adder are connected in series to the first sampling and storage device. An adder, a third sample-storage device, a first programmer, a multiplier divider, a second programmer that is connected to a computer are connected in series to the second sampling-storage device. The fourth recorder-storage device is connected to the emergency recorder, to which the third programmer and multiplier divider are connected in series. The fourth sample-storage device is associated with the fourth, fifth and sixth programmers. The first and third programmers are connected to the fourth programmer, and the fifth programmer is connected to the first and third programmers. The sixth and second programmers are connected in series to the fifth programmer, the sixth programmer being connected to the third sampling-storage device and to the multiplier divider. A clock is connected to each sample-storage device.

Description

The utility model relates to the field of information processing systems and can be used for functional control and diagnosis of a linear current-limiting reactor / resistor based on its model.

There are currently no devices for determining the parameters of a linear current limiting reactor / resistor.

The objective of the utility model is to create a device for determining the parameters of a linear current-limiting reactor / resistor with its longitudinal and transverse inclusion.

A device for determining the parameters of a linear current-limiting reactor / resistor, according to a utility model, comprises a unit for calculating the active resistance R and inductance L connected via an emergency recorder to a linear current-limiting reactor / resistor in the places of its connection to the generator voltage buses. In the calculation unit R, L, the first and second sampling and storage devices are connected to the emergency recorder, and the inverter and the adder are connected in series to the first sampling and storage device. An adder, a third sample-storage device, a first programmer, a multiplier divider, a second programmer, the outputs of which are connected to a computer, are connected in series to the second sampling-storage device. The fourth recorder-storage device is connected to the emergency recorder, to which the third programmer and multiplier divider are connected in series. The fourth sample-storage device is associated with the fourth, fifth and sixth programmers. The first and third programmers are connected to the fourth programmer, and the fifth programmer

connected to the first and third programmers. The sixth and second programmers are connected in series to the fifth programmer, the sixth programmer being connected to the third sampling-storage device and to the multiplier divider. A clock is connected to each sample-storage device.

Using the proposed device circuit, it is possible to determine the parameters of a linear current-limiting reactor / resistor with its longitudinal and transverse inclusion: active resistance R and inductance L (Fig. 3).

Figure 1 shows the structural diagram of the inclusion of a device for determining the parameters of a linear current-limiting reactor / resistor from arrays of samples of instantaneous values of currents and voltages with longitudinal (Fig. 1, a) and transverse (Fig. 1, b) inclusions.

Figure 2 shows the hardware circuit block 2 calculation of R, L.

Figure 3 shows the equivalent circuit of a linear current-limiting reactor / resistor with longitudinal (figure 3, a) and transverse (figure 3, b) inclusions.

The device (figure 1) for determining the parameters of a linear current-limiting reactor / resistor 1 contains a block 2 for calculating R, L, the inputs of which are connected to the connection point of the current-limiting reactor / resistor through an emergency recorder, and the outputs of block 2 for calculating R, L are connected to a computer 3 (may be a longitudinal inclusion or transverse inclusion of a reactor / resistor).

Block 2 calculation of R, L (figure 2) consists of the first 4 (UVX 1) and second 5 (UVX 2) sampling and storage devices, the inputs of which are connected to the emergency recorder. An inverter 6, an adder 7 is connected in series to the first sampling-storage device 4 (UVX 1). An adder 7, a third sampling-storage device 8 (UVX 3), and the first programmer 9 are connected in series to the second sampling-storage device 5 (UVX 1). P 1), the multiplier divider 10, the second programmer 11

(P 2), the outputs of which are connected to the computer 3. The input of the fourth sampling-storage device 12 (UVX 4) is connected to the emergency recorder. The third programmer 13 (P 3) and the multiplier divider 10 are connected in series to the output of the fourth sampling-storage device 12 (UVX 4). In addition, the output of the fourth sampling-storage device 12 (UVX 4) is connected to the inputs of the fourth 14 (P 4) , the fifth 15 (P 5) and the sixth 16 (P 6) programmers. The outputs of the fourth programmer 14 (P 4) are connected to the inputs of the first 9 (P 1) and third 13 (P 3) programmers. The output of the fifth programmer 15 (P 5) is connected to the inputs of the first 9 (P 1) and third 13 (P 3) programmers. In addition, the sixth 16 (P 6) and second 11 (P 2) programmers are connected in series to the output of the fifth programmer 15 (P 5). The inputs of the sixth programmer 16 (P 6) are connected to the output of the third sampling-storage device 8 (UVX 3) and to the output of the multiplier-divider 10. A clock generator 17 (TG) is connected to each sampling-storage device.

All sampling and storage devices are implemented on 1100SK2 microcircuits. Programmer 9 (P 1), programmer 11 (P 2), programmer 13 (P 3), programmer 14 (P 4), programmer 15 (P 5) and programmer 16 (P 6) can be executed on the atmel series 51 microcontroller AT89S53. Inverter 6 and adder 7 are implemented on operational amplifiers 140UD17A. As a multiplier divider 10, a 525PS3 chip can be used. The clock generator 17 (TG) can be implemented on the AT80C2051 microcontroller.

The device operates as follows. The inputs of the unit 2 for calculating R, L devices provide the following signals from the emergency recorder:

or 1) at the same time to the input buses of block 2 of the calculation of R, L, if the longitudinal inclusion of the reactor / resistor,

or 2) at the same time to the input buses of block 2 of calculating R, L, if the transverse inclusion of the reactor / resistor,

Where - an array of samples of instantaneous voltage values at the beginning of a linear current-limiting reactor / resistor,

- an array of samples of instantaneous current values at the beginning of a linear current-limiting reactor / resistor,

- an array of samples of instantaneous voltage values at the end of a linear current-limiting reactor / resistor.

When the linear current-limiting reactor / resistor of block 2 for calculating R, L is switched on, the signal u ₂ (t _j ) is supplied to the input of the first sampling-storage device 4 (IWX 1), and the signal u is supplied to the input of the second sampling-storage device 5 (IWC 2) ₁ (t _j ), and the input of the fourth sampling-storage device 12 (UVX 4) is a signal i ₁ (t _j ),

where t _j = t ₁ , t ₂ , ..., t _N is the point in time,

- the number of partitions on the period T,

Δt = 0.3125 · 10 ^-3 s is the sampling step of arrays of instantaneous current / voltage values.

The values of the signals are written to the sampling and storage blocks 4 (UVX 1), 5 (UVX 2) and 12 (UVX 4) and stored there as current, then from the output of the sampling and storage device 4 (UVX 1) the signal u ₂ (t _j ) arrives at inverter 6. Using inverter 6, the negative value of the previous signal u ₂ (t _j ) is converted to positive. From the output of the inverter 6, the signal value u ₂ (t _j ) is fed to the input of the adder 7. At the same time, from the output of the device

sample-storage 5 (UVX 2), the value of the signal u ₁ (t _j ) is fed to the input of the adder 7. Using the adder 7 determine the difference in the values of the signals u ₁ (t _j ) -u ₂ (t _j ). From the output of the adder 7, the difference in the values of the signals u ₁ (t _j ) -u ₂ (t _j ) enters the third sampling-storage device 8 (UVX 3). At the same time, the value of the signal i ₁ (t _j ) enters the block sampling-storage 12 (UVX 4). The values of the signals recorded in the blocks of sample-storage 8 (UVX 3) and 12 (UVX 4) are stored there as current. From the output of the sample-storage device 8 (UVX 3), the signal u ₁ (t _j ) -u ₂ (t _j ) is fed to the input of the programmer 9 (P 1) and to the input of the programmer 16 (P 6). From the output of the sample-storage device 12 (UVX 4), the signal i ₁ (t _j ) is supplied to the inputs of the programmers 13 (P 3), 14 (P 4), 15 (P 5) and 16 (P 6). Using the fourth programmer 14 (P 4) determine the value of the derivative of the signal :

From the output of the fourth programmer 14 (P 4), the value of the derivative of the signal is fed to the inputs of the first 9 (P 1) and third 13 (P 3) programmers. Simultaneously with the process described above, at the output of the fifth programmer 15 (P 5) receive the value of the derivative of the signal :

From the output of the fifth programmer 15 (P 5) the value of the derivative of the signal arrives at the inputs of the first 9 (P 1), third 13 (P 3) and sixth 16 (P 6) programmers. The output of the first programmer 9 (P 1) determine the value of the voltage across the active resistance U _R (t _j ) (figure 3):

From the output of the first programmer 9 (P 1), the voltage across the active resistance is fed to the input of the multiplier divider 10. At the same time, using the third programmer 13 (P 3), the calculated current value i _1P (t _j ) is obtained:

From the output of the third programmer 13 (P 3), the value of the calculated current i _1P (t _j ) is fed to the input of the divider multiplier 10. At the output of the multiplier divider 10, the resistance value of the linear current-limiting reactor / resistor R _{i is} determined (Fig. 3):

From the output of the multiplier divider 10, the value of the active resistance R _{i is} fed to the input of the sixth programmer 16 (P 6) and to the input of the second programmer 11 (P 2). Using the sixth programmer 16 (P 6) get the inductance value of the linear current-limiting reactor / resistor] L _i (figure 3):

From the output of the sixth programmer 16 (P 6), the inductance value L _{i is} fed to the input of the second programmer 11 (P 2), with which the average values for the period of the active resistance and inductance of the reactor / resistor are determined by the formulas:

where N _Ri , N _Li - respectively, the number of values of R _i , L _i found on the period.

When the linear current-limiting reactor / resistor is transversely turned on, the operation of the calculation unit 2 of R, L is similar to the operation of the calculation unit when it is switched on longitudinally, but the signal does not arrive at the input of the first sampling-storage device 4 (UVX 1) (u ₂ (t _j ) = 0) , at the input of the second sampling-storage device 5 (UVX 2), the signal u ₁ (t _j ) is received, and at the input of the fourth sampling-storage device 12 (UVX 4), the signal i ₁ (t _j ) is received.

The values of the signals are recorded in the sample-storage blocks 5 (UVX 2) and 12 (UVX 4) and stored there as current ones. From the output of the second sampling-storage device 5 (UVX 2), the value of the signal u ₁ (t _j ) is fed to the input of the adder 7. Using the adder 7, the difference between the values of the signals u ₁ (t _j ) -u ₂ (t _j ) is determined. From the output of the adder 7, the difference in the values of the signals u ₁ (t _j ) -u ₂ (t _j ) = u ₁ (t _j ) is supplied to the sample-storage device 8 (UVX 3). At the same time, the value of the signal i ₁ (t _j ) enters the fourth block of sample-storage 12 (UVX 4). Otherwise, the operation of unit 2 for calculating R, L during transverse activation of the reactor / resistor is similar to the operation of unit 2 for calculating R, L during longitudinal activation and consists in determining the value of the derivative of the signal :

Then get the value of the derivative of the signal :

Next, determine the value of the voltage across the active resistance U _R (t _j ) (figure 3):

Then get the value of the rated current i _1P (t _j ):

Next, determine the value of the active resistance of the linear current-limiting reactor / resistor R _i (figure 3):

Then, the inductance value of the linear current limiting reactor / resistor L _{i is} obtained (FIG. 3):

Next, the average values for the period of the active resistance and inductance of the reactor / resistor are determined by the formulas:

where N _Ri , N _Li - respectively, the number of values of R _i , L _i found on the period.

Thus, the utility model makes it possible to measure the resistance R and the inductance L of a linear current-limiting reactor / resistor when it is longitudinally or transversely turned on.

Claims (1)

A device for determining the parameters of a linear current-limiting reactor / resistor, characterized in that an active resistance and inductance calculation unit is connected in series to the linear current-limiting reactor / resistor in the places of its connection to the generator voltage buses through the emergency recorder, in which the first and second sampling and storage devices connected to the emergency recorder; the inverter and the adder are connected in series to the first sampling-storage device; an adder, a third sample-storage device, a first programmer, a multiplier divider, a second programmer that is connected to a computer are connected in series to the second sampling-storage device, in addition, a fourth sample-storage device is connected to the emergency recorder, to which a third a programmer and a multiplier divider, while the fourth sampling-storage device is connected to the fourth, fifth, and sixth programmers, in addition, the fourth programmer is connected to the first and third programmers, and the fifth programmer is connected to the first and third programmers, with the sixth and second programmers connected in series to the fifth programmer, and the sixth programmer connected to the third sampling-storage device and to the multiplier-divider, and to each sampling-storage device connected clock.