RU80583U1 - DEVICE FOR DETERMINING CURRENT ELECTRIC TRANSMISSION LINE PARAMETERS - Google Patents

Abstract

The utility model relates to the field of information processing systems and can be used for functional control and diagnosis of power lines, based on its inverse L-shaped adaptive model, tunable according to current information about the parameters of the electric mode of the line. The technical result is the creation of a device for determining the current parameters of the power line. The device for determining the current parameters of the power line contains four sampling and storage devices connected via a communication channel to emergency recorders at the beginning and at the end of the power line, three inverters, two adders, a clock generator. In this case, the first inverter, the first adder, is connected in series to the first sampling-storage device. The first adder is connected to the second fetch-storage device. A clock is connected to each sample-storage device. The first programmer, the second programmer, the outputs of which are connected to a computer, are connected in series to the first adder. A third programmer connected to the second programmer is connected to the first adder. Moreover, the third programmer is connected to the first programmer. In addition, the fourth and fifth programmers, the second inverter and the sixth programmer are connected in series to the first sampling-storage device. In this case, a second programmer is connected to the second inverter and the fifth programmer. In addition, the fifth and sixth programmers are connected to the first sample-storage device. The sixth programmer is connected to the fourth programmer. The third inverter, the second adder, are connected in series to the third sampling-storage device, and the second adder, the fifth programmer, is connected in series to the fourth sampling-storage device. Moreover, to the second adder

the sixth programmer is connected. In addition, the first and third programmers, the seventh programmer, the output of which is connected to the first and third programmers, are connected to the fourth sampling-storage device. 3 ill.

Description

The utility model relates to the field of information processing systems and can be used for functional control and diagnosis of power lines, based on its inverse L-shaped adaptive model, tunable according to current information about the parameters of the electric mode of the line.

A device for determining the current parameters of the electric mode of the power line [RF Patent No. 51752, IPC 7, G01R 25/00, publ. 02/27/2006 Bull. No. 6], selected as a prototype, containing two parallel-connected units for calculating the active and reactive resistances of the longitudinal and transverse branches of the L-shaped equivalent circuit of the power line, the inputs of which are connected to the beginning of the power line and its end through the communication channel. The outputs of the calculation units are connected to a computer. In the first calculation unit, the first and second sampling and storage devices are connected to the input of the device. An inverter and an adder are connected in series to the first sampling-storage device. An adder, a third retrieval-storage device, a fourth retrieval-storage device, a second inverter, a second adder, the output of which is connected to a multiplier, to which an integrator is connected in series, a multiplier-divider, the output of which is connected to a computer, are connected to the second sampling-storage device. The input of the fifth sample-storage device is connected to the input of the device. The sixth sample-storage device, the third adder, the output of which is connected to the first multiplier, are connected in series to the output of the fifth sample-storage device. A clock is connected to each sample-storage device. The inputs of the third and fifth sampling-storage devices are connected to the second

a multiplier, the output of which is connected to a second integrator, the output of which is connected to a second multiplier divider connected to a computer. The third adder and the converter of effective values are connected to the output of the fifth sampling-storage device, the outputs of which are connected to the third multiplier associated with the inputs of the first and second multiplier divisors. Another calculation unit contains two sampling and storage devices, the inputs of which are connected to the input of the device. The first sampling-storage device is connected in series to its inverter, adder. The same adder, a third retrieval-storage device, a fourth retrieval-storage device, a second adder, the output of which is connected to a multiplier, to which an integrator, a multiplier-divider, the output of which is connected to a computer, are connected in series to the second sampling-storage device. The input of the fifth sample-storage device is connected to the input of the device, and the sixth sample-storage device, the second inverter, and the third adder, the output of which is connected to the multiplier, are connected in series to the output of the fifth sample-storage device. All sampling and storage devices are connected to a clock. The inputs of the third and fifth sampling-storage devices are connected to a second multiplier, the output of which is connected to a second integrator connected to a second divider multiplier connected to a computer. The third sampling-storage device is connected to a current value converter, the outputs of which are connected to a third multiplier connected to the inputs of the first and second divider multipliers. A second adder is connected to the output of the third fetch-storage device, and a third adder is connected to the output of the fifth fetch-storage device.

A disadvantage of the known device is the inability to determine the current parameters of the power lines to build its inverse L-shaped adaptive model.

The objective of the utility model is to expand the arsenal of technical means for determining the current parameters of the power line to build its inverse L-shaped adaptive model.

The device for determining the current parameters of the power line, as in the prototype, contains four sampling and storage devices connected through the communication channel to emergency recorders at the beginning and at the end of the power line, two inverters, three adders, a clock generator. In this case, the first inverter, the first adder, is connected in series to the first sampling-storage device. The first adder is connected to the second fetch-storage device. A clock is connected to each sample-storage device. According to a utility model, the first programmer, the second programmer, the outputs of which are connected to a computer, are connected in series to the first adder. A third programmer connected to the second programmer is connected to the first adder. Moreover, the third programmer is connected to the first programmer. In addition, the fourth and fifth programmers, the second inverter and the sixth programmer are connected in series to the first sampling-storage device. In this case, a second programmer is connected to the second inverter and the fifth programmer. In addition, the fifth and sixth programmers are connected to the first sample-storage device. The sixth programmer is connected to the fourth programmer. The third inverter, the second adder, are connected in series to the third sampling-storage device, and the second adder, the fifth programmer, is connected in series to the fourth sampling-storage device. Moreover, the sixth programmer is connected to the second adder. In addition, the first and third programmers, the seventh programmer, the output of which is connected to the first and third programmers, are connected to the fourth sampling-storage device.

Using the proposed device circuit, you can determine the current parameters of the inverse L-shaped circuit equivalent circuit power lines (figure 3):

1) resistance R _1i and inductance L _{1i of the} longitudinal branch of the line;

2) resistance R _0i , and capacitance C _{0i of the} transverse branch of the line.

Figure 1 presents the structural diagram of the inclusion of a device for determining the current parameters of the power line in the power line and to the system (computer).

Figure 2 shows the hardware circuit of the device for determining the current parameters of the line.

Figure 3 presents the inverse L-shaped equivalent circuit of the power line.

The device (figure 1) for determining the current parameters of the power line 1 contains a unit 2 for calculating R _1cp , L _1cp , R _0cp , C _0cp , the inputs of which are connected through the communication channel (CS) to the emergency recorders at the beginning and at the end of the power line ( 1 are not shown), and the outputs of the calculation unit 2 are connected to the computer 3.

Calculation block 2 (FIG. 2) consists of the first 4 (UVX 1), second 5 (UVX 2), third 6 (UVX 3) and fourth 7 (UVX 4) sampling and storage devices, the inputs of which are connected to emergency recorders. The first inverter 8, the first adder 9 are connected in series to the first sampling-storage device 4 (UVX 1). The first adder 9, the first programmer 10 (P 1), and the second programmer 11 are connected in series to the second sampling-storage device 5 (UVX 1) P 2), the outputs of which are connected to the computer 3. To the output of the first adder 9 is connected a third programmer 12 (P 3) connected to the second programmer 11 (P 2). The output of the first programmer 10 (P 1) is connected to the third programmer 12 (P 3). To the output of the first sampling-storage device 4

(UVX 1) the fourth 13 (P 4) and fifth 14 (P 5) programmers, the second inverter 15 and the sixth programmer 16 (P 6) are connected in series. The outputs of the second inverter 15 and the sixth programmer 16 (P 6) are connected to the second programmer 11 (P 2). In addition, the output of the first sampling-storage device 4 (UVX 1) is connected to the fifth 14 (P 5) and sixth 16 (P 6) programmers. The sixth programmer 16 (P 6) is connected to the output of the fourth programmer 13 (P 4). The third inverter 17, the second adder 18 are connected in series to the third sampling-storage device 6 (UVX 3). The second adder 18, the fifth programmer 14 (P 5) are connected in series to the fourth sampling-storage device 7 (UVX 3). The output of the second adder 18 is connected to the sixth programmer 16 (P 6). The first 10 (P 1) and third 12 (P 3) programmers, the seventh programmer 19 (P 7), the output of which is connected with the first 10 (P 1) and the third 12 ( P 3) programmers. A clock generator 20 (TG) is connected to each sample-storage device.

All sampling and storage devices are implemented on 1100SK2 microcircuits. The programmers are made on a microcontroller series 51 manufacturer atmel AT89S53. Inverters and combiners are implemented on operational amplifiers 140UD17A. The clock generator 20 (TG) can be implemented on the AT80C2051 microcontroller.

The device operates as follows. The inputs of the calculation unit 2 R _1cp , L _1cp , R _0cp , C _0cp devices from the emergency recorders simultaneously give signals to the input buses of block 2 of calculation R _1cp , L _1cp , R _0cp , C _0cp ,

Where - an array of samples of instantaneous voltage values at the beginning of the power line,

- an array of samples of instantaneous current values at the beginning of power lines,

- an array of samples of instantaneous voltage values at the end of the line,

- an array of samples of instantaneous current values at the end of the power line.

On the block 2 calculation R _1sr, L _1sr, R _0sr, S _{0sr of the} first sampling-storage device 4 (UVX 1) receives the signal u ₂ (t _j ), to the input of the second sampling-storage device 5 (UVX 2) the signal u ₁ ( t _j ), and to the input of the third sampling and storage device 6 (I / O 3) the signal i ₂ (t _j ), and to the input of the fourth device of sampling and storage 7 (I / O 4) the signal i ₁ (t _j ),

where t _j = t ₁ , t ₂ , ..., t _N - time instants,

N = T / Δt is the number of partitions on the period T,

Δt = 0.625 · 10 ^-3 s is the sampling step of the arrays of instantaneous current / voltage values at the beginning and at the end of power lines.

The values of the signals are recorded in the sampling-storage device 4 (UVX 1), 5 (UVX 2), 6 (UVX 3) and 7 (UVX 4) and stored there as current ones, then from the output of the first sampling-storage device 4 (UVX 1) ) the signal u ₂ (t _j ) enters the programmers 13 (P 4), 14 (P 5) and 16 (P 6) and to the first inverter 8, with which the negative value of the previous signal u ₂ (t _j ) is converted into a positive . From the output of the first inverter 8, the signal value u ₂ (t _j ) is fed to the input of the first adder 9. At the same time, from the output of the second sampling-storage device 5 (UX2), the signal value u ₁ (t _j ) is fed to the second input of the first adder 9, with which the difference in signal values u ₁ (t _j ) -u ₂ (t _j ) is determined. From the output of the first adder 9, the difference in the values of the signals u ₁ (t _j ) -u ₂ (t _j ) enters the programmers 10 (P 1) and 12 (P 3). At the same time, the value of signal i ₂ (t _j ) enters the third sampling-storage device 6 (UVX 3), and the value of signal i ₁ (t _j ) enters the fourth sampling-storage device 7

(UVX 4). The values of the signals recorded in the sample-storage device 6 (UVX 3) and 7 (UVX 4) are stored there as current. Then, from the output of the third sampling-storage device 6 (UVX 3), the signal i ₂ (t _j ) is supplied to the third inverter 17, with the help of which the negative value of the previous signal i ₂ (t _j ) is converted to positive. From the output of the third inverter 17, the signal value i ₁ (t _j ) is fed to the input of the second adder 18. At the same time, from the output of the fourth sampling-storage device 7 (I / O 4), the signal value i ₁ (t _j ) is supplied to the programmers 10 (P 1), 12 (P 3), 19 (P 7) and to the second input of the adder 18, with which the difference in the values of the signals i ₁ (t _j ) -i ₂ (t _j ) is determined. From the output of the second adder 18, the difference in the values of the signals i ₁ (t _j ) -i ₂ (t _j ) enters the programmers 14 (P 5) and 16 (P 6). Using the fourth programmer 13 (P 4) determine the values of the derivatives of the signal and :

From the outputs of the fourth programmer 13 (P 4) the values of the derivatives of the signal and arrive at the inputs of the fifth 14 (P 5) and sixth 16 (P 6) programmers. At the same time, using the seventh programmer 19 (P 7) determine the values of the derivatives of the signal and :

From the output of the seventh programmer 19 (P 7) the values of the derivatives of the signal and arrive at the inputs of the first 10 (P 1) and third 12 (P 3) programmers. Using the first programmer 10 (P 1) determine

the value of the inductance L _{1i of the} longitudinal branches of the power line (figure 3):

From the output of the first programmer 10 (P 1), the inductance value L _{1i of the} longitudinal branch of the power line is fed to the inputs of the second 11 (P 2) and third 12 (P 3) programmers. At the same time, using the fifth programmer 14 (P 5) determine the value of the capacitance C _{0i of the} transverse branch of the power line (figure 3):

From the output of the fifth programmer 14 (P 5), the value of the capacitance C _0i , the transverse branch of the power line, is fed to the inputs of the second inverter 15, with which the negative value of the capacitance C _0i is converted to positive. From the output of the second inverter 15, the capacitance value C _{0i is} supplied to the input of the second 11 (P 2) and the sixth 16 (P 6) programmers. Using the third programmer 12 (P 3) determine the value of the active resistance R _{1i of the} longitudinal branches of the power line (figure 3):

From the output of the third programmer 12 (P 3), the value of the active resistance R _{1i of the} longitudinal branch of the power line is fed to the input of the second programmer 11 (P 2). At the same time, using the sixth programmer 16 (P 6) determine the value of the active resistance R _{0i of the} transverse branch of the power line (figure 3):

.

From the output of the sixth programmer 15 (P 6), the resistance value R _{0i of the} transverse branch of the power line is fed to the input of the second programmer 11 (P 2). Using the second programmer 11 (P 2), the average values for the period of the active resistance and inductance of the longitudinal branch, active resistance and capacitance of the transverse branch of the power line are determined by the formulas:

Where , , - accordingly, the number of values R _1i , L _1i , R _0i , C _0i found on the period.

Thus, the utility model makes it possible to measure the resistance R _1i and the inductance L _{1i of the} longitudinal branch, the resistance R _0i and the capacitance C _{0i of the} transverse branch of the inverse L-shaped equivalent circuit of the power line.

Claims (1)

A device for determining the current parameters of the power line, containing four sampling-storage devices connected through the communication channel to emergency recorders at the beginning and at the end of the power line, three inverters, two adders, a clock generator, while the first sampling-storage device is connected in series to first inverter, first adder; a first adder is connected to the second sample-storage device, a clock generator is connected to each sample-storage device, characterized in that the first programmer, the second programmer, the outputs of which are connected to the computer, are connected in series to the first adder; a third programmer connected to the second programmer is connected to the first adder, and a third programmer is connected to the first programmer, in addition, the fourth and fifth programmers, the second inverter and the sixth programmer are connected in series to the first sampling-storage device, with the second inverter and fifth programmer the second programmer is connected, in addition, the fifth and sixth programmers are connected to the first sample-storage device; the sixth programmer is connected to the fourth programmer; the third inverter, the second adder are connected in series to the third sampling-storage device, and the second adder, the fifth programmer are connected in series to the fourth sampling-storage device, and the sixth programmer is connected to the second adder, in addition, the first and third are connected to the fourth sampling-storage device programmers, the seventh programmer, the output of which is connected to the first and third programmers.