RU69262U1 - DEVICE FOR DETERMINING THE CURRENT PRIMARY AND SECONDARY PARAMETERS OF THE ELECTRIC TRANSMISSION LINE - 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 direct 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 primary and secondary parameters of the power line. A device for determining the current primary and secondary parameters of a power line contains a unit for calculating the longitudinal active and reactive resistances of the line, the transverse active and reactive resistances of the line, the current and voltage damping coefficients, the current phase shift factors and the voltage line phase shift, connected through the communication channel to the recorders emergency situations at the beginning and at the end of the power line and to the computer. Moreover, in the calculation unit, the first and second sampling and storage devices are connected to emergency recorders, and the first inverter, the first adder, is connected in series to the first sampling and storage device. The first adder, the first programmer, the second programmer, the third programmer that is connected to the computer are connected in series to the second sampling-storage device. The third and fourth sampling-storage devices are connected to emergency recorders, and the second inverter, the second adder, are connected in series to the third sampling-storage device. Moreover, the second adder, the fourth programmer, the fifth programmer, which is connected to the third programmer, are sequentially connected to the fourth sample-storage device. Moreover, the third programmer is connected to the button keyboard. In addition, the first programmer is connected to the second adder

valid values associated with the fifth programmer. The third sample-storage device is connected to the first programmer and to the second programmer of effective values associated with the second programmer. In addition, the sixth and seventh programmers connected to the third programmer are connected to the first fetch-storage device, and the fourth, sixth and seventh programmers are connected to the second fetch-storage device. In addition, the third sample-storage device is associated with the sixth and seventh programmers. Moreover, the sixth and seventh programmers are connected to the fourth sampling-storage device. A clock is connected to each sample-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 direct L-shaped adaptive model, tunable according to current information about the parameters of the electric mode of the line.

A device is known for determining the current parameters of the electric mode of the power line [RF Patent No. 49278, IPC 7, G01R 25/00, publ. 11/10/2005 Bull. No. 31], characterized in that it contains four parallel connected calculation blocks, the inputs of which are connected to the beginning of the power line and its end, and the outputs of the calculation blocks are connected to a computer. Two calculation units consist of each of the first and second sampling-storage devices, the inputs of which are connected to the input of the device, the third sampling-storage device, inverter, adder, multiplier, integrator, multiplier-divider, the output of which is connected to the first sampling-storage device to the computer. A fourth sample-storage device, a second adder, the output of which is connected to the multiplier, is connected in series to the second sampling-storage device. A clock is connected to each sample-storage device. The first sample-storage device is connected to the second multiplier, the inputs of which are connected to the input of the device, and its output is connected to the second integrator, the output of which is connected to the multiplier-divider. The outputs of the first and second sampling-storage devices are connected to the converter of actual values, the outputs of which are connected to a computer. Two other calculation blocks consist of each of two sampling and storage devices, the inputs of which are connected to the input of the device. To one

the sampling-storage device is connected in series to its sampling-storage device, an inverter, its own adder, multiplier, integrator, multiplier-divider, the output of which is connected to a computer. Another sampling-storage device is connected in series to its sampling-storage device, its own adder, the output of which is connected to the multiplier. All sampling and storage devices are connected to a clock. One sampling-storage device is connected to its second multiplier, the inputs of which are connected to the input of the device, and its output is connected to a second integrator, the output of which is connected to the divider multiplier.

A disadvantage of the known device is the impossibility of directly determining the current primary and secondary parameters of power lines to build its direct L-shaped adaptive model.

A device is known for determining the current parameters of the electric mode of the power line [RF Patent No. 57016, IPC 7, G01R 25/00, publ. 09/27/2006 Bull. No. 27], characterized in that it contains three parallel-connected units for calculating the active and reactive resistances of the longitudinal and transverse branches of the T-shaped equivalent circuit of the power line, the inputs of which are connected to the beginning of the power line and through the communication channel to its end. The outputs of the calculation units are connected to a computer. In two identical calculation blocks, 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 programmer, 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 COMPUTER. The input of the fifth sample-storage device is connected to the input of the device. By the fifth

the sampling-storage device is connected in series with the sixth sampling-storage device, a third adder, the output of which is connected to the first multiplier. A clock is connected to each sample-storage device. The inputs of the third and fifth sampling-storage devices are connected to the second multiplier, the output of which is connected to the second integrator, the output of which is connected to the second multiplier-divider, connected to the 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. The third block for calculating the active and reactive resistances of the transverse branch of the T-shaped equivalent circuit of the power line contains the seventh and eighth sampling and storage devices, the inputs of which are connected to the input of the device. The third inverter, the fourth adder, are connected in series to the seventh sample-storage device. The fourth adder, the second programmer, the fourth inverter, the fifth adder, the input of the ninth sample-storage device are connected to the input of the device to the eighth sample-storage device. A fifth adder, a tenth sample-storage device, an eleventh sample-storage device, a fifth inverter, a sixth adder, the output of which is connected to a fourth multiplier, to which a third integrator, a third multiplier divider is connected in series, are connected in series to the output of the ninth sampling and storage device which is connected to the computer. The inputs of the twelfth and thirteenth sampling-storage devices are connected to the input of the device. The sixth inverter is connected to the output of the twelfth sampling and storage device, the output of which is connected to the seventh adder. The seventh adder, the fourteenth sample-storage device, the fifteenth sample-storage device, the eighth are connected to the output of the thirteenth sample-storage device

the adder, the output of which is connected with the fourth multiplier. A second clock is connected to each sample-storage device. The inputs of the tenth and fourteenth sampling-storage devices are connected to the fifth multiplier, the output of which is connected to the fourth integrator, the output of which is connected to the fourth multiplier-divider, connected to the computer. The eighth adder and the second converter of effective values, the outputs of which are connected to the sixth multiplier connected to the inputs of the third and fourth multipliers-dividers, are also connected to the output of the fourteenth sample-storage device.

A disadvantage of the known device is the impossibility of directly determining the current primary and secondary parameters of power lines to build its direct L-shaped adaptive model.

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 resistance 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 in series. The input of the fifth sample-storage device is connected to the input of the device. The sixth fetch-storage device, the third

an adder whose output is connected to the first multiplier. A clock is connected to each sample-storage device. The inputs of the third and fifth sampling-storage devices are connected to the second multiplier, the output of which is connected to the second integrator, the output of which is connected to the second multiplier-divider, connected to the 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, the third retrieval-storage device, the fourth retrieval-storage device, the second adder, the output of which is connected to the multiplier, to which the integrator is connected in series, the multiplier-divider, the output of which is connected to a computer, are connected to the second sampling-storage device in series. 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 impossibility of directly determining the current primary and secondary parameters of power lines to build its direct L-shaped adaptive model.

Currently, there are no devices for determining the current primary and secondary parameters of the power line to build its direct L-shaped adaptive model.

The objective of the utility model is to create a device for determining the current primary and secondary parameters of a power line to build its direct L-shaped adaptive model.

A device for determining the current primary and secondary parameters of the power line, as in the prototype, contains a calculation unit connected via a communication channel to emergency recorders at the beginning and at the end of the power line and to a computer.

According to the utility model, a block for calculating current and voltage damping coefficients, current phase shift and voltage phase-shift coefficients of the power line, active and reactive resistances of the longitudinal and transverse branches of the straight L-shaped power line equivalent circuit in which the first and second sampling and storage devices are connected to emergency recorders, and the first inverter, the first adder, is connected in series to the first sampling-storage device. The first adder, the first programmer, the second programmer, which is connected to the computer, are connected in series to the second sampling-storage device. In addition, the third programmer connected to the second programmer is connected to the first adder, and the first inverter, the first adder, is connected in series to the first sampling-storage device. The first adder, the first programmer, the second programmer, the third programmer that is connected to the computer are connected in series to the second sampling-storage device. The third and fourth sampling and storage devices are connected to emergency recorders, and to

the third inverter-storage device is connected in series to the second inverter, the second adder. Moreover, the second adder, the fourth programmer, the fifth programmer, which is connected to the third programmer, are sequentially connected to the fourth sample-storage device. Moreover, the third programmer is connected to the button keyboard. In addition, the first effective value programmer connected to the fifth programmer is connected to the second adder. The third sample-storage device is connected to the first programmer and to the second programmer of effective values associated with the second programmer. In addition, the sixth and seventh programmers connected to the third programmer are connected to the first fetch-storage device, and the fourth, sixth and seventh programmers are connected to the second fetch-storage device. In addition, the third sample-storage device is associated with the sixth and seventh programmers. Moreover, the sixth and seventh programmers are connected to the fourth sampling-storage device. A clock is connected to each sample-storage device.

Using the proposed device circuit, you can determine the current primary and secondary parameters of the direct L-shaped equivalent circuit of the power line (figure 3):

1) longitudinal active R _{1 (0)} and reactive X _{1 (0)} line resistance;

2) transverse active R _{0 (0)} and reactive X _{0 (0)} line resistance;

3) attenuation coefficients of the current α ₁ and voltage α _U ;

4) current phase shift factors β ₁ and voltage phase shift β _U.

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

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

Figure 3 presents a direct L-shaped equivalent circuit of a power line.

The device (figure 1) for determining the current primary and secondary parameters of the power line 1 contains a block 2 calculation of R _{1 (0)} , X _{1 (0)} , R _{0 (0)} , X _{0 (0)} , β _{U (0)} , β _{I (0)} , α _{U (0)} , α _{I (0)} , the outputs of which are connected via a communication channel (CS) to emergency recorders at the beginning and at the end of the power line (not shown in Fig. 1), and the outputs of the unit calculation 2 connected to the computer 3.

The calculation unit 2 (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 emergency recorders. The first inverter 6, the first adder 7 are connected in series to the first fetch-storage device 4 (UVX 1). The first adder 7, the first programmer 8 (P 1), and the second programmer 9 ( P 2), the third programmer 10 (P 3), the outputs of which are connected to the computer 3. The inputs of the third 11 (UVX 3) and fourth 12 (UVX 4) sampling and storage devices are connected to emergency recorders. The second inverter 13, the second adder 14 are connected in series to the third fetch-storage device 11 (UVX 3). The second adder 14, the fourth programmer 15 (P 4), and the fifth programmer 16 ( P 5), the outputs of which are connected to the third programmer 10 (P 3). The input of the third programmer 10 (P 3) is connected to a button keyboard (not shown in FIG. 2). The output of the second adder 14 is connected to the first programmer of effective values 17 (PDZ 1), associated with the fifth programmer 16 (P 5). The output of the third sampling-storage device 11 (UVX 3) is connected to the first programmer 8 (P 1) and to the second programmer of effective values 18 (PDZ 2) associated with the second programmer 9 (P 2). The sixth 19 (P 6) and seventh 20 (P 7) programmers are connected to the first sampling-storage device 4 (UVX 1)

the outputs of which are connected with the third programmer 10 (P 3). The fourth 15 (P 4), sixth 19 (P 6) and seventh 20 (P 7) programmers are connected to the second sample-storage device 5 (UVX 2). In addition, the third sampling-storage device 11 (UVX 3) is connected to the sixth 19 (P 6) and seventh 20 (P 7) programmers. The sixth 19 (P 6) and seventh 20 (P 7) programmers are connected to the fourth sampling-storage device 12 (UVX 4). A clock 21 (TG) is connected to each sample-storage device.

All sampling and storage devices are implemented on 1100SK2 microcircuits. Programmers of actual values and programmers are executed on a series 51 microcontroller of the manufacturer atmel AT89S53. Inverters and combiners are implemented on operational amplifiers 140UD17A. Clock generator 21 (TG) can be implemented on the AT80C2051 microcontroller.

The device operates as follows. The inputs of block 2 calculation R _{1 (0)} , X _{1 (0)} , R _{0 (0)} , X _{0 (0)} , β _{U (0)} , β _{I (0)} , α _{U (0)} , α _{I ( 0)} devices from emergency recorders simultaneously give signals , , , to the input buses of block 2 of calculation R _{1 (0)} , X _{1 (0)} , R _{0 (0)} , X _{0 (0)} , β _{U (0)} , β _{I (0)} , α _{U (0)} , α _{I (0)}

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 block 2 of the calculation of R _{1 (0)} , X _{1 (0)} , R _{0 (0)} , X _{0 (0)} , β _{U (0)} , β _{I (0)} , α _{U (0)} , α _{I (0 )} at the input of the first sample and hold device 4 (SHA 1) receives a signal u ₂ (t _j), the input of the second sample-and-storing device 5 (SHA 2), the signal u ₁ (t _j), and the input of the third sample-and-hold device 11 (UVX 3) signal i ₂ (t _j ), and to the input of the fourth sampling-storage device 12 (UVX 4) signal i ₁ (t _j ),

where t _j = t ₁ , t ₂ , ..., N are times,

- the number of partitions on the period T,

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

The values of the signals are recorded in the blocks of sampling-storage 4 (UVX 1), 5 (UVX 2), 11 (UVX 3) and 12 (UVX 4) and stored there as current, then from the output of the sampling-storage device 4 (UVX 1) the signal u ₂ (t _j ) is fed to the inverter 6, in the programmers 19 (P 6) and 20 (P 7). Using the 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 value of the signal u ₂ (t _j ) is fed to the input of the adder 7. At the same time, from the output of the sampling-storage device 5 (UVX 2), the value of the signal u ₁ (t _j ) is fed to the second input of the adder 7, programmers 15 (P 4), 19 (P 6) and 20 (P 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

programmer 8 (P 1). At the same time, the value of the signal i ₂ (t _j ) enters the sampling-storage unit 11 (UVX 3), and the value of the signal i ₁ (t _j ) enters the sampling-storage block 12 (UVX 4). The values of the signals recorded in the blocks of sample-storage 11 (UVX 3) and 12 (UVX 4) are stored there as current. Then, from the output of the sampling-storage device 11 (UVX 3), the signal i ₂ (t _j ) receives the programmers 8 (P 1), 19 (P 6), 20 (P 7), into the programmer of effective values 18 (PDZ 2) and inverter 13. Using the inverter 13, the negative value of the previous signal i ₂ (t _j ) is converted to positive. From the output of the inverter 13, the value of the signal i ₂ (t _j ) is fed to the input of the adder 14. At the same time, from the output of the sampling-storage device 12 (UVX 4), the value of the signal i ₁ (t _j ) is supplied to the programmers 19 (P 6), 20 (P 7) and to the second input of the adder 14. Using the adder 14 determine the difference in the values of the signals i ₁ (t _j ) -i ₂ (t _j ). From the output of the adder 14, the difference in the values of the signals i ₁ (t _j ) -i ₂ (t _j ) enters the programmer 15 (P 4) and the programmer of the effective values 17 (PDZ 1). Using the first programmer 8 (P 1), the values of the active power loss ΔP ₁₂ at the longitudinal active resistance R _{1 of} the power line and the reactive power loss ΔQ ₁₂ at the longitudinal reactance X _{1 of the} line are determined:

,

.

From the outputs of the first programmer 8 (P 1), the values of the losses of active and reactive power are supplied to the inputs of the second programmer 9 (P 2).

At the same time, using the second programmer of effective values 18 (PDZ 2) determine the effective value of the signal I ₂ :

From the output of the second programmer of effective values 18 (PDZ 2), the value of the signal I _{2 is} fed to the input of the second programmer 9 (P 2). Using the second programmer 9 (P 2) determine the values of the longitudinal active R ₁ reactive X ₁ resistance of the power line (figure 3):

At the same time, using the sixth programmer 19 (P 6), the value of the current phase shift coefficient β _I and the voltage phase shift coefficient β _U are determined:

At the same time, using the seventh programmer 20 (P 7), the value of the current attenuation coefficient α _I and the voltage attenuation coefficient α _U are determined:

or

or

or

or

Using the fourth programmer 15 (P 4) determine the values of the active power loss ΔP ₀ on the transverse resistance R _{0 of} the power line and the reactive power loss ΔQ ₀ on the transverse reactance X _{0 of the} line:

,

.

From the outputs of the fourth programmer 15 (P 4), the values of the losses of active and reactive power are supplied to the inputs of the fifth programmer 16 (P 5). At the same time, using the first programmer of effective values 17 (PDZ 1) determine the effective value of the signal I ₀ :

From the output of the first programmer of effective values 17 (PDZ 1), the value of the signal I _{0 is} fed to the input of the fifth programmer 16 (P 5). Using the fifth programmer 16 (P 5) determine the values of the transverse active R ₀ reactive X ₀ resistance of the power line (figure 3):

From the outputs of programmers 9 (P 2), 19 (P 6), 20 (P 7) and 16 (P 5), the values of the signals R ₁ , X ₁ , R ₀ , X ₀ , β _U , β _I , α _U , α _I go to the inputs of the third programmer 10 (P 3). In the third programmer 10 (P 3) enter the value of the length of the power line L. Using the third programmer 10 (P 3) determine the values of these signals per unit length of the power line:

Thus, the utility model allows to measure the longitudinal active R _{1 (0)} and reactive X _{1 (0)} line resistances, transverse active R _{0 (0)} and reactive X _{0 (0)} line resistances, current damping coefficients α _I and voltage α _U as well as current phase shift factors β _I and voltage phase shift β _{U of} the power line.

Claims (1)

A device for determining the current primary and secondary parameters of the power line, containing a calculation unit connected via a communication channel to emergency recorders at the beginning and at the end of the power line and to a computer, characterized in that the current and voltage attenuation coefficient calculation unit is selected , coefficients of the phase shift of the current and phase shift of the voltage of the power line, active and reactive resistances of the longitudinal and transverse branches of the direct L-shaped circuit of equivalent circuit of electric lines a driver in which the first and second sampling and storage devices are connected to emergency recorders, and the first inverter, the first adder, is connected in series to the first sampling and storage device; the first adder, the first programmer, the second programmer, the third programmer that is connected to the computer are connected in series to the second sampling-storage device; the third and fourth sampling and storage devices are connected to emergency recorders, and the second inverter, the second adder are connected in series to the third sampling and storage device, and the second adder, the fourth programmer, and the fifth programmer connected to the third are connected to the fourth sampling and storage device the programmer, and the third programmer is connected to the keypad, in addition, to the second adder is connected to the first programmer of valid values associated with fifth programmer; the third sample-storage device is connected to the first programmer and to the second effective value programmer associated with the second programmer, in addition, the sixth and seventh programmers connected to the third programmer are connected to the first sample-storage device, and the fourth is connected to the second sample-storage device , the sixth and seventh programmers, in addition, the third sampling-storage device is connected to the sixth and seventh programmers, and a ses one and seventh programmers, a clock generator is connected to each sampling-storage device.