RU49278U1 - DEVICE FOR DETERMINING THE CURRENT ELECTRIC MODE OF THE ELECTRIC TRANSMISSION LINE - Google Patents

Abstract

The utility model relates to the field of information processing systems and can be used to control the transmission line (power transmission line), based on its adaptive model, tunable according to current information about the parameters of the electric mode of the power transmission line. Allows you to measure the effective values of voltages and currents, phase shift values between sinusoidal signals of the same frequency in AC circuits that do not necessarily belong to the same circuit or even to one device. The device for determining the current parameters of the electric mode of the power line 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. In this case, two calculation units consist of each of the first and second sampling and storage devices, the inputs of which are connected to the input of the device. A third sample-storage device, an inverter, an adder, a multiplier, an integrator, a multiplier-divider, the output of which is connected to a computer, are connected in series to the first sampling-storage device. 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. The other two calculation blocks consist of each of two sampling and storage devices, the inputs of which are connected to the input of the device. At the same time to one device of selection -

storage sequentially connected to your device sampling-storage, inverter, 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. In addition, all sample-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.

Description

The utility model relates to the field of information processing systems and can be used to control the transmission line (power transmission line), based on its adaptive model, tunable according to current information about the parameters of the electric mode of the power transmission line.

Currently, there are no devices for determining the current parameters of the electric mode of the power line.

The objective of the utility model is to create a device for determining the current parameters of the electric mode of the power line.

According to a utility model, the device 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.

In this case, two calculation units consist of each of the first and second sampling and storage devices, the inputs of which are connected to the input of the device. A third sample-storage device, an inverter, an adder, a multiplier, an integrator, a multiplier-divider, the output of which is connected to a computer, are connected in series to the first sampling-storage device. 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. In this case, one sampling-storage device, an inverter, an adder, a multiplier, an integrator, a multiplier-divider, the output of which is connected to a computer, are connected in series to one sampling-storage device. 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. In addition, all sample-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.

Using the proposed device circuit, you can determine the current parameters of the electric mode of the power line:

1) the current values of voltage U ₁ , U ₂ and current I ₁ , I ₂ at the beginning and at the end of the line;

2) angles of divergence of vectors φ ₁ between voltage U ₁ and current I ₁ at the beginning of the power line, φ ₂ between voltage U ₂ and current I ₂ at the end of the line, angle of divergence of vectors between the voltage U ₁ at the beginning of the power line and between the voltage U ₂ at its end and the angle of divergence of the vectors between the current I ₁ at the beginning of the power line and between the current I ₂ at the end of the line.

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

Figure 2 shows the hardware circuit of the calculation unit I ₁ , I ₂ , - 4.

A device for determining the current parameters of power lines consists of four parallel-connected blocks: calculation unit φ ₁ - 1, block

calculation φ ₂ - 2, calculation unit U ₁ , U ₂ , - 3, calculation unit I ₁ , I ₂ , - 4, the inputs of which are connected to the beginning of the power line and through the communication channel (CS) to its end, and the outputs of the calculation units are connected to a computer.

Block calculation U ₁ , U ₂ , - 3 and the calculation unit I ₁ , I ₂ , - 4 (FIG. 2) are made identically and each of them includes a first retrieval-storage device 1 (UVX 1), a second retrieval-storage device 2 (UVX 2), a third retrieval-storage device 3 (UVX 3), the fourth sample-storage device 4 (UVX 4), inverter 5 (Inverter), first adder 6 (Adder 1), second adder 7 (Adder 2), first multiplier 8 (Multiplier 1), first integrator 9 (Integrator 1), multiplier - divider 10 (Multiplier-divider), clock generator 11 (TG), second multiplier 12 (Multiplier 2), second integrator 13 (Integrator 2), p Programmer of effective values 14 (PDZ).

The input buses of these calculation units are connected to the inputs of the retrieval-storage devices: the first 1 (UVX 1) and second 2 (UVX 2), the outputs of which are to the inputs of the third 3 (UVX 3), fourth 4 (UVX 4) of the sampling-storage devices, to the inputs of the programmer of the effective values of 14 (PDZ). The outputs of the programmer of the effective values of 14 (PDZ) are connected to the inputs of the segment indicator for outputting the effective values of currents and voltages included in the computer (not shown in Fig. 1). The first sampling-storage device 1 (UVX 1) is connected to the inputs of the first adder 6 (Adder 1). The second sampling-storage device 2 (UVX 2) is connected to the input of the second adder 7 (Adder 2). The input of the third sampling-storage device 3 (UVX 3) is connected to the input of the inverter 5 (Inverter), the output of which is connected to the input of the first adder 6 (Adder 1). The output of the fourth sampling-storage device 4 (UVX 4) is connected to the input of the second adder 7 (Adder 2). The outputs of the first 6 (Adder 1) and second 7 (Adder 2) of the adders are connected to the inputs of the first multiplier 8 (Multiplier 1), the output of which is connected to

the input of the first integrator 9 (Integrator 1). The output of the first integrator 9 (Integrator 1) is connected to the input of the multiplier-divider 10 (Multiplier-divider). The outputs of the clock generator 11 (TG) are connected to the control inputs of the first 1 (UVX 1), second 2 (UVX 2), third 3 (UVX 3) and fourth 4 (UVX 4) sampling-storage devices. The inputs of the second multiplier 12 (Multiplier 2) are connected to the input buses, and its output to the input of the second integrator 13 (Integrator 2). The output of the second integrator 13 (Integrator 2) is connected to the multiplier inputs of the multiplier-divider 10 (Multiplier-divider). The output of the multiplier divider 10 (multiplier divider) is connected to the input of the segment indicator to output the phase shift value (not shown in FIG. 1).

The schemes of the calculation unit φ ₁ - 1 and the calculation unit φ ₂ - 2 are identical to the schemes of the calculation unit U ₁ , U ₂ , - 3 and the calculation unit I ₁ , I ₂ , - 4, except that the circuits of the calculation unit φ ₁ - 1 and the calculation unit φ ₂ - 2 are performed without the programmer of effective values 14 (PDZ).

The first 1 (UVX 1), the second 2 (UVX 2), the third 3 (UVX 3) and the fourth 4 (UVX 4) of the sampling-storage device can be implemented on chips 1100SK2. Inverter 5 (Inverter) can be implemented on a 140UD17A chip. The first 6 (Adder 1) the second 7 (Adder 2), the adders can be implemented on operational amplifiers 140UD17A. As the first multiplier 8 (Multiplier 1), the second multiplier 12 (Multiplier 2) and the multiplier-divider 10 (Multiplier-divider) can be used chip 525PS3. The first integrator 9 (Integrator 1), the second integrator 13 (Integrator 2) can be implemented on the operational amplifier 140UD17A. The clock generator 11 (TG) can be implemented on the AT80C2051 microcontroller. The programmer of effective values of 14 (PDZ) can be performed on a microcontroller series 51 of the manufacturer atmel AT89S53.

The device operates as follows. The inputs of the calculation unit φ ₁ - 1, the calculation unit φ ₂ - 2, the calculation unit U ₁ , U ₂ , - 3 and the calculation unit I ₁ , I ₂ , - 4 devices that implements a method for determining the current parameters of power lines to build its adaptive model, simultaneously gave the following signals:

to the input buses of the calculation unit φ ₁ - 1,

to the input buses of the calculation unit φ ₂ - 2,

to the input buses of the calculation unit U ₁ , U ₂ , - 3,

to the input buses of the calculation unit I ₁ , I ₂ , - 4.

On the calculation unit I ₁ , I ₂ , - 4 at the input of the first sampling-storage device 1 (UVX 1) receives a signal , and the input of the second sampling-storage device 2 (UVX 2) signal ,

where t _j = t ₁ , t ₂ , ..., t _N ,

- the number of partitions on the period T,

Δt = 1 · 10 ^-3 s is the discretization step of arrays of instantaneous values of currents and voltages at the beginning and at the end of power lines.

Arrays of signal values from power lines are presented in Table 1. The values of the signals were recorded in the blocks sampling-storage 1 (UVX 1) and 2 (UVX 2) and stored there as current, then from the output of the device sampling-storage 1 (UVX 1) signal entered the first input of the programmer of effective values 14 (PDZ), then entered the device selection-storage 3 (UVX 3) and became the previous value, and from the output of the device selection-storage 2

(UVX 2), signal value entered the second input of the programmer of effective values of 14 (PDZ), then it entered the sampling-storage device 4 (UVX 4) and became the previous value. At the outputs of the programmer of the effective values of 14 (PDZ) received the actual values of the signals I ₁ and I ₂ . For arrays of values , . From the output of the device sampling-storage 3 (UVX 3) the previous value of the signal entered the inverter 5 (Inverter). Using inverter 5 (Inverter) the negative value of the previous signal transformed into positive. From the inverter 5 output (Inverter) signal value arrived at the input of adder 6 (Adder 1). At the same time, from the output of the sampling-storage device 1 (UVX 1), the current signal value arrived at the input of adder 6 (Adder 1). Using adder 6 (Adder 1), the difference between the current and previous signal values was determined . Simultaneously with the process described above, from the output of the sampling-storage device 4 (UVX 4) the previous signal value received at the input of adder 7 (Adder 2), and from the output of the sampling-storage device 2 (UVX 2), the current signal value arrives at the input of the adder 7 (Adder 2). Using adder 7 (Adder 2), the sum of the current and previous signal values was determined . From the output of adder 6 (Adder 1) the difference between the current and previous signal values arrived at the input of the first multiplier 8 (Multiplier 1), and from the output of the adder 7

(Adder 2) the sum of the current and previous signal values arrived at the input of the first multiplier 8 (Multiplier 1). Using the first multiplier 8 (Multiplier 1), the difference values and the sum of the signals were multiplied and fed to the input of the first integrator 9 (Integrator 1). Using the first integrator 9 (Integrator 1), the products of the difference and the sum of the signals were summed up and the value of reactive quasi-power was determined . In this case . From the output of the first integrator 9 (Integrator 1), the value of reactive quasi-power was supplied to the input of the multiplier-divider 10 (Multiplier-divider). At the same time, when the values of the signals arrived at the sampling-storage blocks 1 (UVX 1) and 2 (UVX 2), they arrived at the second multiplier 12 (Multiplier 2). Using the second multiplier 12 (Multiplier 2), the products of the current values of the signal were determined and that came to the input of the second integrator 13 (Integrator 2). Using the second integrator 13 (Integrator 2), active quasi-power was determined. In this case .With the output of the second integrator 13 (Integrator 2), the value of the active quasi-power was fed to the input of the multiplier-divider 10 (Multiplier-divider), with which the phase shift between the signals was determined .

The work of the remaining calculation units is similar and consists in that they determine the effective voltage values U ₁ , U ₂ at the beginning and at the end of the line using the calculation unit U ₁ , U ₂ , - 3 by the formulas:

and . Then each digital readout is saved as current and previous, then the difference and the sum of each pair of the current and previous values are determined, the difference and the sum are multiplied, then the products are summed. Next, using the calculation unit φ ₁ - 1 determine the reactive power at the beginning of the power line Q ₁ and using the calculation unit φ ₂ - 2 determine the reactive power at the end of the power line Q ₂ :

Then using the calculation unit U ₁ , U ₂ , - 3 determine reactive quasi-power according to the formula:

Next, using the calculation unit φ ₁ - 1 multiply the current samples of the signals and determine their active power at the beginning of the line P ₁ and using the calculation unit φ ₂ - 2 multiply the current samples of the signals and determine their active power at the end of the line P ₂ :

Then using the calculation unit U ₁ , U ₂ , - 3 determine active quasi-power according to the formula:

Next, the angles of divergence of the vectors φ ₁ between the voltage U ₁ and the current I ₁ at the beginning of the power line, φ ₂ between the voltage U ₂ and the current I ₂ at the end of the line are determined by the following formulas:

determine the angle of divergence of vectors between the voltage at the beginning of the power line U ₁ and between the voltage at the end of the transmission line U ₂ according to the formula:

The utility model allows to measure the effective values of voltage U ₁ and current I ₁ at the beginning and end of the line U ₂ and I ₂ , the angles of divergence of vectors φ ₁ between voltage U ₁ and current I ₁ at the beginning of the power line, φ ₂ between voltage U ₂ and current I ₂ at the end of the line, as well as the angles of divergence of vectors between the voltage at the beginning of the power line U ₁ and between the voltage at the end of the transmission line U ₂ and between the current at the beginning of the power line I ₁ and between the current at the end of the power line I ₂ .

Claims (1)

A device for determining the current parameters of the electric mode of the power line, characterized in that it contains four parallel connected calculation blocks, the inputs of which are connected to the beginning of the transmission line and its end, and the outputs of the calculation blocks are connected to a computer, while two calculation blocks consist of each of the first and the second sampling-storage devices, the inputs of which are connected to the input of the device, the third sampling-storage device, an inverter, an adder, a variable a spacer, an integrator, a multiplier divider, the output of which is connected to a computer; the fourth sampling-storage device, the second adder, the output of which is connected to the multiplier, is connected to the second sampling-storage device, a clock generator is connected to each sampling-storage device, and the first sampling-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, and the outputs of the first and second sampling-storage devices are connected to the converter Achen, the outputs of which are connected to the computer; the other two calculation units consist of each of two sampling and storage devices, the inputs of which are connected to the input of the device, while one sampling and storage device, an inverter, an adder, a multiplier, an integrator, a multiplier divider, and an output are sequentially connected to one sampling and storage device which is connected to a computer; another sampling-storage device, its own adder, the output of which is connected to the multiplier, are connected to another sampling-storage device, in addition, all sampling-storage devices are connected to a clock generator, 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 the second integrator, the output of which is connected to the multiplier divider.