RU2547271C2 - Method for matching of three-wire power transmission line with electrical load - Google Patents

Abstract

FIELD: electricity.

SUBSTANCE: invention is related to electric engineering and may be used for transmission of electric power to consumers through a non-symmetric three-wire power transmission line. Initial data on voltage and current in the line can be obtained through interfaces or sensors made in a form of voltage or current transformers, spectrum analyzers, voltage dividers and alternating-current shunts. In result of initial data processing by the processor control signals are generated for correcting elements, which can be represented by direct voltage regulators of power transformers, automated process systems, electric energy accumulators, active power sources such as low-power hydroelectric power plants or electric power plants of other types.

EFFECT: matching of three-wire power line with electrical load is reached in result of fulfilment of certain conditions involving comparison of actual and reference load resistance, voltage in the line end and currents supplied to the load.

3 dwg

Description

The invention relates to electrical engineering and can be used in the design, installation, commissioning and operation of power lines (power lines) when transmitting electrical energy to the consumer.

The transmission of electric energy through extended power lines, as well as increased frequency electric energy through relatively non-extended power lines is ensured by: single-and two-wire power lines with one pair of electromagnetic field waves (incident and reflected); in three-wire - in three pairs; four-wire four, etc. [one]. As a result of matching the power lines with the electric load, the throughput of the power line increases due to the exclusion of the reflected wave. In addition, the degree of distortion of the voltage and current curves decreases, the reliability of electrical equipment increases, the operation of relay protection, automation and communication is normalized, and the environmental situation in the area of operation of power lines improves.

The condition of the coordinated mode of operation of a single-wire power transmission line [2] is known, on the basis of which the device [RU 2390924] operates, where a coordinated mode of operation of a single-wire extended power line is implemented. However, an asymmetric three-phase three-wire power transmission line cannot be matched only by the condition of the coordinated mode [2] due to the specificity of the propagation of voltages and currents along three-wire power lines [3].

Known methods for matching communication lines with the load [4]. However, the technical elements used here, such as a differential amplifier, are not designed to operate at high voltage, for example 1 kV, and this means that the specifics of the implementation of the methods [4] are quite peculiar and not applicable in long power lines of high and ultra-high voltage.

The objective of the invention is the formation of a method for matching an asymmetric three-phase three-wire power line with an electrical load.

The technical result consists in providing the conditions for matching an asymmetric three-phase three-wire high-voltage power line with an electrical load, the implementation of which will entail a reduction in electric energy losses, an increase in the transmission capacity of the line, and a decrease in the degree of distortion of voltage and current curves.

The technical result is achieved in that the method of matching an asymmetric three-phase three-wire power line with an electrical load, which consists in the fact that the initial information about the voltages and currents in the line through the interface devices or sensors is supplied to the processor, characterized in that the conditions for matching the asymmetric three-phase are checked in the processor a three-wire power line with electrical load for each line wire as a result of comparing the actual and reference values load resistances, voltages at the end of the line or currents supplied to the load, and control signals are generated for corrective bodies, which can be used on-load tap-changers of power transformers, automated technological complexes, energy storage devices, active power sources, such as small hydroelectric power stations or power plants other types.

The invention is illustrated by diagrams: Fig. 1 shows an algorithm for ensuring and maintaining coordination of an asymmetric three-phase three-wire uninsulated power transmission line with an electrical load, Fig. 2 shows the algorithm of the processor, in Fig. 3 in block A, logical operations are performed.

The following notation is used in the figures:

1 - corrective body, such as on-load tap-changer of the transformer (KO1);

2 - a transformer supplying power lines with a voltage of 35 kV or higher (T1);

;3 - interface devices, which are voltage and current sensors installed at the beginning of power lines with voltage of 35 kV or higher $$\left({\displaystyle \sum _{i=\mathrm{one}}^{n}D\mathrm{one}}\right)$$

;

4 - analog-to-digital Converter (ADC);

5 - processor (P);

6 - digital-to-analog converter (DAC);

7 - showing or recording device (RO);

8 - power lines of voltage 35 kV or higher (power lines 35 kV OR ABOVE);

9 - step-down transformer, voltage 220 kV / 10 kV (T2);

;10 - interface devices, which are voltage and current sensors installed at the end of power lines with voltage of 35 kV or higher $$\left({\displaystyle \sum _{i=\mathrm{one}}^{n}D2}\right)$$

;

11 - step-down transformer, voltage 10 kV / 0.85 kV (T3);

12 - corrective body, such as on-load tap-changer of a step-down transformer with voltage of 220 kV / 10 kV (KO2);

13 - converter unit, made in the form of rectifier plants for electrolysis, phase A, (VD1);

14 - corrective body, such as on-load tap-changer of a step-down transformer with a voltage of 10 kV / 0.85 kV (KO3);

;15 - generalized electrical load $$({\underset{\_}{z}}_{N\mathrm{BUT}GR.})$$

;

16 - corrective body (KO4), such as TROLL aluminum electrolysis system, electric energy storage, active power sources, such as small hydroelectric power stations;

;17 - generalized load resistance $$\left({\underset{\_}{Z}}_{N.\mathrm{BUT}}=\frac{{\dot{U}}_{N.\mathrm{BUT}}}{\dot{I}{2}_{.\mathrm{BUT}}}\right)$$

;

;18 - generalized load resistance, taking into account the implementation of the coordination of power lines with a voltage of 35 kV or higher 8 (power lines of 35 kV OR ABOVE), $$\left({\underset{\_}{Z}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}}=\frac{{\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}}}{\dot{I}{2}_{N.\mathrm{BUT}}}\right)$$

;

;19 - the amplitude value of the load voltage $$({\dot{U}}_{N.\mathrm{BUT}})$$

;

;20 - amplitude value of the load current $$(\dot{I}{2}_{.\mathrm{BUT}})$$

;

21 is a specialized program for predicting the magnitude of the main characteristics of electric energy in a three-wire power transmission line (LEP3 v.1.00);

;22 - current value, which should be characterized by electric energy transmitted through power lines, consistent with the electrical load $$(\dot{I}{2}_{N.\mathrm{BUT}})$$

;

;23 - the magnitude of the voltage, which should be characterized by electric energy transmitted through power lines, consistent with the electrical load $$({\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}})$$

;

24 is a logical block (A).

The essence of the proposed development is the implementation, using technical means, of the conditions for matching an asymmetric three-phase three-wire high-voltage power line with an electric load [5-8], in the formation of an algorithm for ensuring and maintaining a coordinated mode of operation of an extended asymmetric three-phase three-wire power line.

Let it be necessary to match phase A to the electrical load. For phases B and C, the matching algorithm with the electrical load will be similar.

. Блоки 9 (T2), 11 (Т3), 13 (VD1) и 15 $$({\underset{\_}{Z}}_{НАГР.})$$

образуют общий блок, полное сопротивление которого при достижении согласованного режима работы ЛЭП 8 (ЛЭП 35 кВ ИЛИ ВЫШЕ) определяется величиной 18 $$\left({\underset{\_}{Z}}_{ВОЛН.А}=\frac{{\dot{U}}_{ВОЛН.А}}{\dot{I}{2}_{Н.А}}\right)$$

, а в иных случаях - 17 $$\left({\underset{\_}{Z}}_{Н.А}=\frac{{\dot{U}}_{Н.А}}{\dot{I}{2}_{.А}}\right)$$

. В данном случае полное сопротивление 18 $$\left({\underset{\_}{Z}}_{ВОЛН.А}=\frac{{\dot{U}}_{ВОЛН.А}}{\dot{I}{2}_{Н.А}}\right)$$

является эталонной величиной, к которой должно стремиться значение 17 $$\left({\underset{\_}{Z}}_{Н.А}=\frac{{\dot{U}}_{Н.А}}{\dot{I}{2}_{.А}}\right)$$

в процессе исполнения предлагаемого алгоритма.Figure 1 shows an algorithm for ensuring and maintaining coordination of an asymmetric three-phase three-wire uninsulated power transmission line with an electrical load. Here, as the object of approval, a power line of 35 kV or higher 8 (power line of 35 kV OR ABOVE) is used. In addition, the use of the following electrical equipment was implemented: transformer 2 (T1) - a transformer supplying power lines with a voltage of 35 kV or higher 8 (power lines 35 kV OR ABOVE); transformers 9 (T2) and 11 (T3) - two different groups of step-down transformers having different nominal characteristics; the block of converters 13 (VD1) - converters made in the form of rectifier units for electrolysis, phase A, representing in this case a generalized electrical load 15 $$({\underset{\_}{Z}}^{{}_{{}_{{}_{{}_{N\mathrm{BUT}GR.}}}}})$$

. Blocks 9 (T2), 11 (T3), 13 (VD1) and 15 $$({\underset{\_}{Z}}_{N\mathrm{BUT}GR.})$$

form a common block, the total resistance of which when reaching the agreed mode of operation of power lines 8 (power lines 35 kV OR ABOVE) is determined by the value 18 $$\left({\underset{\_}{Z}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}}=\frac{{\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}}}{\dot{I}{2}_{N.\mathrm{BUT}}}\right)$$

, and in other cases - 17 $$\left({\underset{\_}{Z}}_{N.\mathrm{BUT}}=\frac{{\dot{U}}_{N.\mathrm{BUT}}}{\dot{I}{2}_{.\mathrm{BUT}}}\right)$$

. In this case, the impedance is 18 $$\left({\underset{\_}{Z}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}}=\frac{{\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}}}{\dot{I}{2}_{N.\mathrm{BUT}}}\right)$$

is the reference value that value 17 should aim for $$\left({\underset{\_}{Z}}_{N.\mathrm{BUT}}=\frac{{\dot{U}}_{N.\mathrm{BUT}}}{\dot{I}{2}_{.\mathrm{BUT}}}\right)$$

in the process of executing the proposed algorithm.

или 18 $$\left({\underset{\_}{Z}}_{ВОЛН.А}=\frac{{\dot{U}}_{ВОЛН.А}}{\dot{I}{2}_{Н.А}}\right)$$

. Эти сведения в процессор поступают от устройств сопряжения, каковыми являются датчики тока и напряжения 3 $$\left({\displaystyle \sum _{i=1}^nД1}\right)$$

и 10 $$\left({\displaystyle \sum _{i=1}^nД2}\right)$$

, где анализируемые характеристики электрической энергии доводятся до величин, воспринимаемых компьютерной техникой. Датчики 3 $$\left({\displaystyle \sum _{i=1}^nД1}\right)$$

устанавливаются и используются для сбора сведений о напряжениях и токах в начале исследуемой протяженной несимметричной трехфазной трехпроводной ЛЭП 8 (ЛЭП 35 кВ ИЛИ ВЫШЕ), а датчики 10 $$\left({\displaystyle \sum _{i=1}^nД2}\right)$$

- в конце этой линии электропередачи 8 (ЛЭП 35 кВ ИЛИ ВЫШЕ). В качестве датчиков 3 $$\left({\displaystyle \sum _{i=1}^nД1}\right)$$

и 10 $$\left({\displaystyle \sum _{i=1}^nД2}\right)$$

могут быть использованы трансформаторы напряжения и тока, спектроанализаторы, а также делители напряжения и шунты переменного тока.The main unit of the algorithm of the method for matching an asymmetric three-phase three-wire power line 8 (power line 35 kV OR ABOVE) with an electrical load is processor 5 (P) Fig. 1, where the analysis of information about the state of the generalized load resistance 17 $$\left({\underset{\_}{Z}}_{N.\mathrm{BUT}}=\frac{{\dot{U}}_{N.\mathrm{BUT}}}{\dot{I}{2}_{.\mathrm{BUT}}}\right)$$

or 18 $$\left({\underset{\_}{Z}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}}=\frac{{\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}}}{\dot{I}{2}_{N.\mathrm{BUT}}}\right)$$

. This information is supplied to the processor from the interface devices, which are current and voltage sensors 3 $$\left({\displaystyle \sum _{i=\mathrm{one}}^{n}D\mathrm{one}}\right)$$

and 10 $$\left({\displaystyle \sum _{i=\mathrm{one}}^{n}D2}\right)$$

where the analyzed characteristics of electrical energy are brought to the values perceived by computer technology. Sensors 3 $$\left({\displaystyle \sum _{i=\mathrm{one}}^{n}D\mathrm{one}}\right)$$

are installed and used to collect information about voltages and currents at the beginning of the investigated extended asymmetric three-phase three-wire power lines 8 (power lines 35 kV OR ABOVE), and the sensors 10 $$\left({\displaystyle \sum _{i=\mathrm{one}}^{n}D2}\right)$$

- at the end of this power line 8 (power line 35 kV OR ABOVE). As sensors 3 $$\left({\displaystyle \sum _{i=\mathrm{one}}^{n}D\mathrm{one}}\right)$$

and 10 $$\left({\displaystyle \sum _{i=\mathrm{one}}^{n}D2}\right)$$

voltage and current transformers, spectrum analyzers, as well as voltage dividers and AC shunts can be used.

и 10 $$\left({\displaystyle \sum _{i=1}^nД2}\right)$$

аналоговые сигналы преобразовать в дискретные. Цифроаналоговый преобразователь 6 (ЦАП) позволяет сформированные в виде дискретных сигналов в процессоре 5 (П) команды корректирующим органам 1 (КО1), 12 (КО2), 14 (КО3) и 16 (КО4) преобразовать в аналоговые. В данном случае в качестве корректирующих органов 1 (КО1), 12 (КО2) и 14 (КО3) использованы устройства РПН силовых трансформаторов, а в качестве корректирующего органа 16 (KO4) - система электролиза алюминия ТРОЛЛЬ [9, 10], накопители электроэнергии, источники активной мощности, такие как малые гидроэлектростанции, позволяющие изменять величину полного сопротивления обобщенной нагрузки 17 $$\left({\underset{\_}{Z}}_{Н.А}=\frac{{\dot{U}}_{Н.А}}{\dot{I}{2}_{.А}}\right)$$

путем воздействия на технологический процесс. На рис.1 это сопротивление обозначено символом 15 $$({\underset{\_}{Z}}_{НАГР.})$$

. Результаты действия описываемого алгоритма выводятся на показывающий или самопишущий прибор 7 (РО).Analog-to-digital converter 4 (ADC) Fig. 1 allows formed in sensors 3 $$\left({\displaystyle \sum _{i=\mathrm{one}}^{n}D\mathrm{one}}\right)$$

and 10 $$\left({\displaystyle \sum _{i=\mathrm{one}}^{n}D2}\right)$$

convert analog signals to discrete. The digital-to-analog converter 6 (DAC) allows the corrective bodies 1 (KO1), 12 (KO2), 14 (KO3) and 16 (KO4) formed in the form of discrete signals in the processor 5 (P) to convert to analog. In this case, on-load tap-changers of power transformers were used as corrective organs 1 (KO1), 12 (KO2) and 14 (KO3), and TROLL aluminum electrolysis system [9, 10], electric power storage devices were used as corrective body 16 (KO4), sources of active power, such as small hydroelectric power plants, allowing changing the value of the total resistance of the generalized load 17 $$\left({\underset{\_}{Z}}_{N.\mathrm{BUT}}=\frac{{\dot{U}}_{N.\mathrm{BUT}}}{\dot{I}{2}_{.\mathrm{BUT}}}\right)$$

by influencing the process. In Fig. 1, this resistance is indicated by the symbol 15 $$({\underset{\_}{Z}}_{N\mathrm{BUT}GR.})$$

. The results of the described algorithm are displayed on a indicating or recording device 7 (PO).

и напряжения 19 $$({\dot{U}}_{Н.А})$$

нагрузки, затем определяется величина 17 $$\left({\underset{\_}{Z}}_{Н.А}=\frac{{\dot{U}}_{Н.А}}{\dot{I}{2}_{.А}}\right)$$

. Определенные таким образом величины 20 $$(\dot{I}{2}_{.А})$$

, 19 $$({\dot{U}}_{Н.А})$$

, 17 $$\left({\underset{\_}{Z}}_{Н.А}=\frac{{\dot{U}}_{Н.А}}{\dot{I}{2}_{.А}}\right)$$

подаются в следующий блок 24 (A).The algorithm of the processor 5 (P) is shown in Fig. 2: from 4 (ADC), the amplitude values of the current 20 enter processor 5 (P) $$(\dot{I}{2}_{.\mathrm{BUT}})$$

and voltage 19 $$({\dot{U}}_{N.\mathrm{BUT}})$$

load, then a value of 17 is determined $$\left({\underset{\_}{Z}}_{N.\mathrm{BUT}}=\frac{{\dot{U}}_{N.\mathrm{BUT}}}{\dot{I}{2}_{.\mathrm{BUT}}}\right)$$

. The quantities thus determined are 20 $$(\dot{I}{2}_{.\mathrm{BUT}})$$

, 19 $$({\dot{U}}_{N.\mathrm{BUT}})$$

, 17 $$\left({\underset{\_}{Z}}_{N.\mathrm{BUT}}=\frac{{\dot{U}}_{N.\mathrm{BUT}}}{\dot{I}{2}_{.\mathrm{BUT}}}\right)$$

served in the next block 24 (A).

и 23 $$({\dot{U}}_{ВОЛН.А})$$

формируются величины тока и напряжения в конце рассматриваемой линии, какими должна характеризоваться электрическая энергия, передаваемая по несимметричной ЛЭП 8 (ЛЭП 35 кВ ИЛИ ВЫШЕ), согласованной с электрической нагрузкой. Эти величины тока и напряжения определяются следующим образом [5-8]:Block 21 (LEP3 v.1.00) in Fig. 2 illustrates the use in the proposed method of matching the asymmetric three-phase three-wire power transmission line with the electrical load of a specialized program for predicting the magnitude of the main characteristics of electric energy in an asymmetric power transmission line of a three-phase three-wire version [11]. Using the program, the effective values of the complex values of currents and voltages, the propagation constants of the waves of the electromagnetic field along the wires of the power transmission line, and the values of the intrinsic and mutual wave resistances are determined. In blocks 22 $$(\dot{I}{2}_{N.\mathrm{BUT}})$$

and 23 $$({\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}})$$

current and voltage values are formed at the end of the line under consideration, which should be characterized by electric energy transmitted through an asymmetric power line 8 (power line 35 kV OR ABOVE), consistent with the electrical load. These current and voltage values are determined as follows [5-8]:

1 case (for the first propagation constant, the first pair of waves of the electromagnetic field):

; $$\frac{{\dot{U}}_{ВОЛН.В}}{\dot{I}{2}_{Н.В}}=\frac{{\dot{U}}_{Н.В}}{\dot{I}{2}_{.В}}$$

; $$\frac{{\dot{U}}_{ВОЛН.С}}{\dot{I}{2}_{Н.С}}=\frac{{\dot{U}}_{Н.С}}{\dot{I}{2}_{.С}}$$

, $$\frac{{\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}}}{\dot{I}{2}_{N.\mathrm{BUT}}}=\frac{{\dot{U}}_{N.\mathrm{BUT}}}{\dot{I}{2}_{.\mathrm{BUT}}}$$

; $$\frac{{\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{AT}}}{\dot{I}{2}_{N.\mathrm{AT}}}=\frac{{\dot{U}}_{N.\mathrm{AT}}}{\dot{I}{2}_{.\mathrm{AT}}}$$

; $$\frac{{\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{FROM}}}{\dot{I}{2}_{N.\mathrm{FROM}}}=\frac{{\dot{U}}_{N.\mathrm{FROM}}}{\dot{I}{2}_{.\mathrm{FROM}}}$$

,

Where

; $${\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}}={\dot{U}}_{\mathrm{one}an}{{}^e}^{{-}^{\gamma }{}_{\mathrm{one}n}l}+\frac{{\dot{I}}_{\mathrm{one}Bn\cdot }{\underset{\_}{Z}}_{cB\mathrm{one}n}\cdot {\underset{\_}{Z}}_{cA\ln }}{{\underset{\_}{Z}}_{cAB\mathrm{one}n}}{e}^{{-}^{\gamma }{{}_{\mathrm{one}n}}^l}+\frac{{\dot{I}}_{\mathrm{one}Cn}\cdot {\underset{\_}{Z}}_{cC\mathrm{one}n}\cdot {\underset{\_}{Z}}_{cA\ln }}{{\underset{\_}{Z}}_{cCA\ln }}{e}^{{}_{{-}^{\gamma }{{}_{\mathrm{one}n}}^l}}$$

;

; $${\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.B}={\dot{U}}_{\mathrm{one}}{{}_{Bn}}^e{}^{{-}^{\gamma }{}_{\mathrm{one}n}l}+\frac{{\dot{I}}_{\mathrm{one}An\cdot }{\underset{\_}{Z}}_{cA\mathrm{one}n}\cdot {\underset{\_}{Z}}_{cB\ln }}{{\underset{\_}{Z}}_{cAB\mathrm{one}n}}{e}^{{-}^{\gamma }{}_{\mathrm{one}n}l}+\frac{{\dot{I}}_{\mathrm{one}Cn}\cdot {\underset{\_}{Z}}_{cC\mathrm{one}n}\cdot {\underset{\_}{Z}}_{cB\ln }}{{\underset{\_}{Z}}_{cBC\ln }}{e}^{{}_{{-}^{\gamma }{}_{\mathrm{one}n}l}}$$

;

; $${\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.C}={\dot{U}}_{\mathrm{one}Cn}{{}^e}^{{-}^{\gamma }{}_{\mathrm{one}n}l}+\frac{{\dot{I}}_{\mathrm{one}An\cdot }{\underset{\_}{Z}}_{cA\mathrm{one}n}\cdot {\underset{\_}{Z}}_{cC\ln }}{{\underset{\_}{Z}}_{cCA\mathrm{one}n}}{e}^{{-}^{\gamma }{}_{\mathrm{one}n}l}+\frac{{\dot{I}}_{\mathrm{one}Bn}\cdot {\underset{\_}{Z}}_{cB\mathrm{one}n}\cdot {\underset{\_}{Z}}_{cC\ln }}{{\underset{\_}{Z}}_{cBC\ln }}{e}^{{}_{{-}^{\gamma }{}_{\mathrm{one}n}l}}$$

;

; $$\dot{I}{2}_{N.\mathrm{BUT}}={\dot{I}}_{\mathrm{one}An}{{}^e}^{{-}^{\gamma }\mathrm{one}{n}^l}+\frac{{\dot{I}}_{\mathrm{one}Bn\cdot }{\underset{\_}{Z}}_{cB\mathrm{one}n}}{{\underset{\_}{Z}}_{cAB\ln }}e{-}^{\gamma }{{}_{\mathrm{one}n}}^l+\frac{{\dot{I}}_{\mathrm{one}Cn\cdot }{\underset{\_}{Z}}_{cC\mathrm{one}n}}{{\underset{\_}{Z}}_{cCA\ln }}{e}^{-\gamma }{{}_{\mathrm{one}n}}^l$$

;

; $$\dot{I}{2}_{N.B}={\dot{I}}_{\mathrm{one}Bn}{{}^e}^{{-}^{\gamma }\mathrm{one}{n}^l}+\frac{{\dot{I}}_{\mathrm{one}An\cdot }{\underset{\_}{Z}}_{cA\mathrm{one}n}}{{\underset{\_}{Z}}_{cAB\ln }}e{-}^{\gamma }{{}_{\mathrm{one}n}}^l+\frac{{\dot{I}}_{\mathrm{one}Cn\cdot }{\underset{\_}{Z}}_{cC\mathrm{one}n}}{{\underset{\_}{Z}}_{cBC\ln }}{e}^{-\gamma }{{}_{\mathrm{one}n}}^l$$

;

; $$\dot{I}{2}_{N.C}={\dot{I}}_{\mathrm{one}Cn}{{}^e}^{{-}^{\gamma }\mathrm{one}{n}^l}+\frac{{\dot{I}}_{\mathrm{one}An\cdot }{\underset{\_}{Z}}_{cA\mathrm{one}n}}{{\underset{\_}{Z}}_{cCA\ln }}e{-}^{\gamma }{{}_{\mathrm{one}n}}^l+\frac{{\dot{I}}_{\mathrm{one}Bn\cdot }{\underset{\_}{Z}}_{cB\mathrm{one}n}}{{\underset{\_}{Z}}_{cBC\ln }}{e}^{-\gamma }{{}_{\mathrm{one}n}}^l$$

;

, $${\dot{U}}_{H.B}$$

, $${\dot{U}}_{H.C}$$

- комплексные значения действующих величин фазных напряжений на клеммах электрической нагрузки (конец линии); $$\dot{I}{2}_{.A}$$

, $$\dot{I}{2}_{.B}$$

, $$\dot{I}{2}_{.C}$$

- комплексные значения действующих величин линейных токов электрической нагрузки (конец линии); $${\dot{U}}_{ВОЛН.А}$$

, $${\dot{U}}_{ВОЛН.B}$$

, $${\dot{U}}_{ВОЛН.C}$$

- комплексные значения действующих величин фазных напряжений на клеммах источника питания (начало линии) от первой пары (условно) волн (падающей и отраженной) электромагнитного поля; ^γ _1n - первая (условно) постоянная распространения волн электромагнитного поля; l - длина рассматриваемого участка ЛЭП; $$\dot{I}{2}_{H.A}$$

, $$\dot{I}{2}_{H.B}$$

, $$\dot{I}{2}_{H.C}$$

- комплексные значения действующих величин линейных токов от источника питания (начало линии) от первой пары (условно) волн электромагнитного поля; $${\dot{U}}_{1An}$$

, $${\dot{U}}_{1Bn}$$

, $${\dot{U}}_{1Cn}$$

- комплексные значения действующих величин фазных напряжений в начале рассматриваемого участка, B; $${\dot{I}}_{1An}$$

, $${\dot{I}}_{1Bn}$$

, $${\dot{I}}_{1Cn}$$

- комплексные значения действующих величин фазных токов в начале рассматриваемого участка ЛЭП, A; $${\underset{\_}{Z}}_{cA\ln }$$

, $${\underset{\_}{Z}}_{cB\ln }$$

, $${\underset{\_}{Z}}_{cC\ln }$$

- собственные волновые сопротивления, Ом; $${\underset{\_}{Z}}_{cAB\ln }$$

, $${\underset{\_}{Z}}_{cBC\ln }$$

, $${\underset{\_}{Z}}_{cCA\ln }$$

- взаимные волновые сопротивления, Ом. $${\dot{U}}_{H.A}$$

, $${\dot{U}}_{H.B}$$

, $${\dot{U}}_{H.C}$$

- complex values of the effective values of phase voltages at the terminals of the electrical load (end of line); $$\dot{I}{2}_{.A}$$

, $$\dot{I}{2}_{.B}$$

, $$\dot{I}{2}_{.C}$$

- complex values of the effective values of linear currents of electric load (end of line); $${\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}}$$

, $${\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.B}$$

, $${\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.C}$$

- complex values of the effective values of the phase voltages at the terminals of the power source (beginning of the line) from the first pair of (conditionally) waves (incident and reflected) of the electromagnetic field; ^γ _1n is the first (conditionally) propagation constant of the waves of the electromagnetic field; l is the length of the considered section of power lines; $$\dot{I}{2}_{H.A}$$

, $$\dot{I}{2}_{H.B}$$

, $$\dot{I}{2}_{H.C}$$

- complex values of the effective values of linear currents from the power source (beginning of the line) from the first pair (conditionally) of the waves of the electromagnetic field; $${\dot{U}}_{\mathrm{one}An}$$

, $${\dot{U}}_{\mathrm{one}Bn}$$

, $${\dot{U}}_{\mathrm{one}Cn}$$

- complex values of the current values of phase voltages at the beginning of the considered section, B; $${\dot{I}}_{\mathrm{one}An}$$

, $${\dot{I}}_{\mathrm{one}Bn}$$

, $${\dot{I}}_{\mathrm{one}Cn}$$

- complex values of the effective values of phase currents at the beginning of the considered section of the power transmission line, A; $${\underset{\_}{Z}}_{cA\ln }$$

, $${\underset{\_}{Z}}_{cB\ln }$$

, $${\underset{\_}{Z}}_{cC\ln }$$

- intrinsic wave impedances, Ohm; $${\underset{\_}{Z}}_{cAB\ln }$$

, $${\underset{\_}{Z}}_{cBC\ln }$$

, $${\underset{\_}{Z}}_{cCA\ln }$$

- mutual wave impedances, Ohm.

2 case (for the second propagation constant, the second pair of waves of the electromagnetic field):

; $$\frac{{\dot{U}}_{ВОЛН.В}}{\dot{I}{2}_{Н.В}}=\frac{{\dot{U}}_{Н.В}}{\dot{I}{2}_{.В}}$$

; $$\frac{{\dot{U}}_{ВОЛН.С}}{\dot{I}{2}_{Н.С}}=\frac{{\dot{U}}_{Н.С}}{\dot{I}{2}_{.С}}$$

, $$\frac{{\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}}}{\dot{I}{2}_{N.\mathrm{BUT}}}=\frac{{\dot{U}}_{N.\mathrm{BUT}}}{\dot{I}{2}_{.\mathrm{BUT}}}$$

; $$\frac{{\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{AT}}}{\dot{I}{2}_{N.\mathrm{AT}}}=\frac{{\dot{U}}_{N.\mathrm{AT}}}{\dot{I}{2}_{.\mathrm{AT}}}$$

; $$\frac{{\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{FROM}}}{\dot{I}{2}_{N.\mathrm{FROM}}}=\frac{{\dot{U}}_{N.\mathrm{FROM}}}{\dot{I}{2}_{.\mathrm{FROM}}}$$

,

Where

; $${\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}}={\dot{U}}_{\mathrm{one}an}{{}^e}^{{-}^{\gamma }{}_{2n}l}+\frac{{\dot{I}}_{\mathrm{one}Bn\cdot }{\underset{\_}{Z}}_{cB2n}\cdot {\underset{\_}{Z}}_{cA2n}}{{\underset{\_}{Z}}_{cAB2n}}{e}^{{-}^{\gamma }{{}_{2n}}^l}+\frac{{\dot{I}}_{\mathrm{one}Cn}\cdot {\underset{\_}{Z}}_{cC2n}\cdot {\underset{\_}{Z}}_{cA2n}}{{\underset{\_}{Z}}_{cCA2n}}{e}^{{}_{{-}^{\gamma }{{}_{2n}}^l}}$$

;

; $${\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.B}={\dot{U}}_{\mathrm{one}}{{}_{Bn}}^e{}^{{-}^{\gamma }{}_{2n}l}+\frac{{\dot{I}}_{\mathrm{one}An\cdot }{\underset{\_}{Z}}_{cA2n}\cdot {\underset{\_}{Z}}_{cB2n}}{{\underset{\_}{Z}}_{cAB2n}}{e}^{{-}^{\gamma }{}_{2n}l}+\frac{{\dot{I}}_{\mathrm{one}Cn}\cdot {\underset{\_}{Z}}_{c\mathrm{FROM}2n}\cdot {\underset{\_}{Z}}_{cB2n}}{{\underset{\_}{Z}}_{cB\mathrm{FROM}2n}}{e}^{{}_{{-}^{\gamma }{}_{2n}l}}$$

;

; $${\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.C}={\dot{U}}_{\mathrm{one}Cn}{{}^e}^{{-}^{\gamma }{}_{2n}l}+\frac{{\dot{I}}_{\mathrm{one}An\cdot }{\underset{\_}{Z}}_{cA2n}\cdot {\underset{\_}{Z}}_{cC2n}}{{\underset{\_}{Z}}_{cCA2n}}{e}^{{-}^{\gamma }{}_{2n}l}+\frac{{\dot{I}}_{\mathrm{one}Bn}\cdot {\underset{\_}{Z}}_{cB2n}\cdot {\underset{\_}{Z}}_{cC2n}}{{\underset{\_}{Z}}_{cBC2n}}{e}^{{}_{{-}^{\gamma }{}_{2n}l}}$$

;

; $$\dot{I}{2}_{N.\mathrm{BUT}}={\dot{I}}_{\mathrm{one}An}{{}^e}^{{-}^{\gamma }2n^l}+\frac{{\dot{I}}_{\mathrm{one}Bn\cdot }{\underset{\_}{Z}}_{cB2n}}{{\underset{\_}{Z}}_{cAB2n}}e{-}^{\gamma }{{}_{2n}}^l+\frac{{\dot{I}}_{\mathrm{one}Cn\cdot }{\underset{\_}{Z}}_{cC2n}}{{\underset{\_}{Z}}_{cCA2n}}{e}^{-\gamma }{{}_{2n}}^l$$

;

; $$\dot{I}{2}_{N.B}={\dot{I}}_{\mathrm{one}Bn}{{}^e}^{{-}^{\gamma }2n^l}+\frac{{\dot{I}}_{\mathrm{one}An\cdot }{\underset{\_}{Z}}_{cA2n}}{{\underset{\_}{Z}}_{cAB2n}}e{-}^{\gamma }{{}_{2n}}^l+\frac{{\dot{I}}_{\mathrm{one}Cn\cdot }{\underset{\_}{Z}}_{cC2n}}{{\underset{\_}{Z}}_{cBC2n}}{e}^{-\gamma }{{}_{2n}}^l$$

;

; $$\dot{I}{2}_{N.C}={\dot{I}}_{\mathrm{one}Cn}{{}^e}^{{-}^{\gamma }2n^l}+\frac{{\dot{I}}_{\mathrm{one}An\cdot }{\underset{\_}{Z}}_{cA2n}}{{\underset{\_}{Z}}_{cCA2n}}e{-}^{\gamma }{{}_{2n}}^l+\frac{{\dot{I}}_{\mathrm{one}Bn\cdot }{\underset{\_}{Z}}_{cB2n}}{{\underset{\_}{Z}}_{cBC2n}}{e}^{-\gamma }{{}_{2n}}^l$$

;

, $${\underset{\_}{Z}}_{cB2n}$$

, $${\underset{\_}{Z}}_{cC2n}$$

- собственные волновые сопротивления, Ом; $${\underset{\_}{Z}}_{cAB2n}$$

, $${\underset{\_}{Z}}_{cBC2n}$$

, $${\underset{\_}{Z}}_{cCA2n}$$

- взаимные волновые сопротивления, Ом.γ _2n - the second (suspended) is the propagation constant of the electromagnetic wave field; $${\underset{\_}{Z}}_{cA2n}$$

, $${\underset{\_}{Z}}_{cB2n}$$

, $${\underset{\_}{Z}}_{cC2n}$$

- intrinsic wave impedances, Ohm; $${\underset{\_}{Z}}_{cAB2n}$$

, $${\underset{\_}{Z}}_{cBC2n}$$

, $${\underset{\_}{Z}}_{cCA2n}$$

- mutual wave impedances, Ohm.

3 case (for the third propagation constant, the third pair of waves of the electromagnetic field):

; $$\frac{{\dot{U}}_{ВОЛН.В}}{\dot{I}{2}_{Н.В}}=\frac{{\dot{U}}_{Н.В}}{\dot{I}{2}_{.В}}$$

; $$\frac{{\dot{U}}_{ВОЛН.С}}{\dot{I}{2}_{Н.С}}=\frac{{\dot{U}}_{Н.С}}{\dot{I}{2}_{.С}}$$

, $$\frac{{\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}}}{\dot{I}{2}_{N.\mathrm{BUT}}}=\frac{{\dot{U}}_{N.\mathrm{BUT}}}{\dot{I}{2}_{.\mathrm{BUT}}}$$

; $$\frac{{\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{AT}}}{\dot{I}{2}_{N.\mathrm{AT}}}=\frac{{\dot{U}}_{N.\mathrm{AT}}}{\dot{I}{2}_{.\mathrm{AT}}}$$

; $$\frac{{\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{FROM}}}{\dot{I}{2}_{N.\mathrm{FROM}}}=\frac{{\dot{U}}_{N.\mathrm{FROM}}}{\dot{I}{2}_{.\mathrm{FROM}}}$$

,

Where

; $${\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}}={\dot{U}}_{\mathrm{one}an}{{}^e}^{{-}^{\gamma }{}_{3n}l}+\frac{{\dot{I}}_{\mathrm{one}Bn\cdot }{\underset{\_}{Z}}_{cB3n}\cdot {\underset{\_}{Z}}_{cA3n}}{{\underset{\_}{Z}}_{cAB3n}}{e}^{{-}^{\gamma }{{}_{3n}}^l}+\frac{{\dot{I}}_{\mathrm{one}Cn}\cdot {\underset{\_}{Z}}_{cC3n}\cdot {\underset{\_}{Z}}_{cA3n}}{{\underset{\_}{Z}}_{cCA3n}}{e}^{{}_{{-}^{\gamma }{{}_{3n}}^l}}$$

;

; $${\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.B}={\dot{U}}_{\mathrm{one}}{{}_{Bn}}^e{}^{{-}^{\gamma }{}_{3n}l}+\frac{{\dot{I}}_{\mathrm{one}An\cdot }{\underset{\_}{Z}}_{cA3n}\cdot {\underset{\_}{Z}}_{cB3n}}{{\underset{\_}{Z}}_{cAB3n}}{e}^{{-}^{\gamma }{}_{3n}l}+\frac{{\dot{I}}_{\mathrm{one}Cn}\cdot {\underset{\_}{Z}}_{c\mathrm{FROM}3n}\cdot {\underset{\_}{Z}}_{cB3n}}{{\underset{\_}{Z}}_{cB\mathrm{FROM}3n}}{e}^{{}_{{-}^{\gamma }{}_{3n}l}}$$

;

; $${\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.C}={\dot{U}}_{\mathrm{one}Cn}{{}^e}^{{-}^{\gamma }{}_{3n}l}+\frac{{\dot{I}}_{\mathrm{one}An\cdot }{\underset{\_}{Z}}_{cA3n}\cdot {\underset{\_}{Z}}_{cC3n}}{{\underset{\_}{Z}}_{cCA3n}}{e}^{{-}^{\gamma }{}_{3n}l}+\frac{{\dot{I}}_{\mathrm{one}Bn}\cdot {\underset{\_}{Z}}_{cB3n}\cdot {\underset{\_}{Z}}_{cC3n}}{{\underset{\_}{Z}}_{cBC3n}}{e}^{{}_{{-}^{\gamma }{}_{3n}l}}$$

;

; $$\dot{I}{2}_{N.\mathrm{BUT}}={\dot{I}}_{\mathrm{one}An}{{}^e}^{{-}^{\gamma }3n^l}+\frac{{\dot{I}}_{\mathrm{one}Bn\cdot }{\underset{\_}{Z}}_{cB3n}}{{\underset{\_}{Z}}_{cAB3n}}e{-}^{\gamma }{{}_{3n}}^l+\frac{{\dot{I}}_{\mathrm{one}Cn\cdot }{\underset{\_}{Z}}_{cC3n}}{{\underset{\_}{Z}}_{cCA3n}}{e}^{-\gamma }{{}_{3n}}^l$$

;

; $$\dot{I}{2}_{N.B}={\dot{I}}_{\mathrm{one}Bn}{{}^e}^{{-}^{\gamma }3n^l}+\frac{{\dot{I}}_{\mathrm{one}An\cdot }{\underset{\_}{Z}}_{cA3n}}{{\underset{\_}{Z}}_{cAB3n}}e{-}^{\gamma }{{}_{3n}}^l+\frac{{\dot{I}}_{\mathrm{one}Cn\cdot }{\underset{\_}{Z}}_{cC3n}}{{\underset{\_}{Z}}_{cBC3n}}{e}^{-\gamma }{{}_{3n}}^l$$

;

; $$\dot{I}{2}_{N.C}={\dot{I}}_{\mathrm{one}Cn}{{}^e}^{{-}^{\gamma }3n^l}+\frac{{\dot{I}}_{\mathrm{one}An\cdot }{\underset{\_}{Z}}_{cA3n}}{{\underset{\_}{Z}}_{cCA3n}}e{-}^{\gamma }{{}_{3n}}^l+\frac{{\dot{I}}_{\mathrm{one}Bn\cdot }{\underset{\_}{Z}}_{cB3n}}{{\underset{\_}{Z}}_{cBC3n}}{e}^{-\gamma }{{}_{3n}}^l$$

;

, $${\underset{\_}{Z}}_{cB3n}$$

, $$$$

$${\underset{\_}{Z}}_{cC3n}$$

- собственные волновые сопротивления, Ом; $${\underset{\_}{Z}}_{cAB3n}$$

, $${\underset{\_}{Z}}_{cBC3n}$$

, $${\underset{\_}{Z}}_{cCA3n}$$

- взаимные волновые сопротивления, Ом.γ _3n is the third (conditionally) propagation constant of the waves of the electromagnetic field; $${\underset{\_}{Z}}_{cA3n}$$

, $${\underset{\_}{Z}}_{cB3n}$$

, $$$$

$${\underset{\_}{Z}}_{cC3n}$$

- intrinsic wave impedances, Ohm; $${\underset{\_}{Z}}_{cAB3n}$$

, $${\underset{\_}{Z}}_{cBC3n}$$

, $${\underset{\_}{Z}}_{cCA3n}$$

- mutual wave impedances, Ohm.

Since the load for each linear wire of a power line 8 (power line 35 kV OR ABOVE) is one, and there are three pairs of electromagnetic field waves propagating through each linear wire, then matching of each wire can be realized only for one pair of waves of the electromagnetic field, namely, according to the above formulas : 1 case (mathematical formulations are used) or 2 case or 3 case.

, какое оно должно быть при согласовании несимметричной трехфазной трехпроводной ЛЭП с этой нагрузкой. Полученные результаты отправляются в блок 24 (A).Next, the load impedance 18 is determined. $$\left({\underset{\_}{Z}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}}=\frac{{\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}}}{\dot{I}{2}_{N.\mathrm{BUT}}}\right)$$

what it should be when matching an asymmetric three-phase three-wire power line with this load. The results are sent to block 24 (A).

, $$\left({\dot{U}}_{ВОЛН.А}\right)$$

с сопротивлением нагрузки 17 $$\left({\underset{\_}{Z}}_{Н.А}=\frac{{\dot{U}}_{Н.А}}{\dot{I}{2}_{.А}}\right)$$

и напряжением в конце линии 19 $$\left({\dot{U}}_{H.A}\right)$$

. Здесь же из сопоставления этих величин определяются ошибки по сопротивлению ΔZ1, ΔZ2, ΔZ3 и по напряжению ΔU1, ΔU2, ΔU3. Затем определяются ошибки по току ΔI01-05, ΔI07, ΔI08. При нулевых значениях ошибок по напряжению ошибки по току ΔI06 и ΔI09 отсутствуют, поэтому в их определении нет необходимости. Информация о величинах ΔZ1, ΔZ2, ΔZ3 и ΔU1, ΔU2, ΔU3 поступает в один из девяти блоков с приоритетом 2. Последующее действие описываемого алгоритма заключается в определении ошибок либо по сопротивлению ΔZ04p, ΔZ06p, ΔZ07p, ΔZ08p, ΔZ09p, либо по напряжению ΔU0lp, ΔU02P, ΔU03p, ΔU05p. Полученные таким образом значения ошибокIn block 24 (A) of Fig. 3, logical operations are performed. Reference values are compared here. 18 $$\left({\underset{\_}{Z}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}}=\frac{{\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}}}{\dot{I}{2}_{N.\mathrm{BUT}}}\right)$$

, $$\left({\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}}\right)$$

with load resistance 17 $$\left({\underset{\_}{Z}}_{N.\mathrm{BUT}}=\frac{{\dot{U}}_{N.\mathrm{BUT}}}{\dot{I}{2}_{.\mathrm{BUT}}}\right)$$

and voltage at the end of line 19 $$\left({\dot{U}}_{H.A}\right)$$

. Here, from a comparison of these values, errors are determined by the resistance ΔZ1, ΔZ2, ΔZ3 and by the voltage ΔU1, ΔU2, ΔU3. Then, the current errors ΔI01-05, ΔI07, ΔI08 are determined. At zero values of voltage errors, there are no current errors ΔI06 and ΔI09, therefore, their determination is not necessary. Information on the quantities ΔZ1, ΔZ2, ΔZ3 and ΔU1, ΔU2, ΔU3 is received in one of nine blocks with priority 2. The subsequent action of the described algorithm consists in determining errors either by the resistance ΔZ04p, ΔZ06p, ΔZ07p, ΔZ08p, ΔZ09p, or by voltage ΔZ09p, or by voltage ΔZ09p ΔU02P, ΔU03p, ΔU05p. Thus obtained error values

, а величины ошибок по сопротивлению попадают в блок суммы ошибок по сопротивлению $${\displaystyle \sum _{i=1}^5{Z}_A}$$

. Сведения о результатах расчета ошибок поступают в один или несколько блоков корректирующих органов 1, 12, 14, 16 (КО1-4) рис.1.voltage are supplied to the unit of the sum of voltage errors $${\displaystyle \sum _{i=\mathrm{one}}^5{U}_A}$$

, and the values of errors in resistance fall into the block of the sum of errors in resistance $${\displaystyle \sum _{i=\mathrm{one}}^5{Z}_A}$$

. Information about the results of the calculation of errors is received in one or more blocks of corrective bodies 1, 12, 14, 16 (KO1-4) Fig. 1.

следует собирать ошибки по току, а затем в результате сопоставления эталонного и действительного значений токов в конце линии сформировать сигнал для корректирующих органов 1, 12, 14, 16 (КО 1-4) рис.1.Here, as a criterion for the functioning of corrective organs, a mismatch of voltage at the end of the line or load resistance is selected. In principle, the current mismatch at the end of the line can also be chosen as such a criterion. For this, in the block $${\displaystyle \sum _{i=\mathrm{one}}^5{Z}_A}$$

current errors should be collected, and then, as a result of comparing the reference and actual current values at the end of the line, generate a signal for corrective organs 1, 12, 14, 16 (KO 1-4) Fig. 1.

и $$17\left({\underset{\_}{Z}}_{H.A}=\frac{{\dot{U}}_{H.A}}{\dot{I}{2}_{.A}}\right)>18\left({\underset{\_}{Z}}_{ВОЛН.А}=\frac{{\dot{U}}_{ВОЛН.А}}{\dot{I}{2}_{Н.А}}\right)$$

ошибка по току не определяется. В этом случае предусмотрено определение дополнительной ошибки по напряжению ΔU_O в виде произведения разницы между 23 $$({\dot{U}}_{ВОЛН.А})$$

и 19 $$\left({\dot{U}}_{H.A}\right)$$

и коэффициента состояния ΔIos1. Затем сведения об этой дополнительной ошибке отправляются в блок $${\displaystyle \sum _{i=1}^5{U}_A}$$

.In the process of implementing the proposed method for matching an asymmetric three-phase three-wire power transmission line with an electrical load, it was found that at: 19 $$\left({\dot{U}}_{H.A}\right)>23\left({\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}}\right)$$

and $$17\left({\underset{\_}{Z}}_{H.A}=\frac{{\dot{U}}_{H.A}}{\dot{I}{2}_{.A}}\right)>\mathrm{eighteen}\left({\underset{\_}{Z}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}}=\frac{{\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}}}{\dot{I}{2}_{N.\mathrm{BUT}}}\right)$$

current error is not detected. In this case, the definition of an additional voltage error ΔU _O is provided in the form of the product of the difference between 23 $$({\dot{U}}_{\mathrm{AT}\mathrm{ABOUT}LN.\mathrm{BUT}})$$

and 19 $$\left({\dot{U}}_{H.A}\right)$$

and the state coefficient ΔIos1. Then information about this additional error is sent to the block. $${\displaystyle \sum _{i=\mathrm{one}}^5{U}_A}$$

.

Block 24 (A) Fig. 3 is implemented in the National Instruments Lab VIEW 2009 environment.

Information sources

1. Bolshanin G.A. Distribution of low-quality electric energy over sections of electric power systems. In 2 kn. Book 1 / G.A. Bolshanin.- Bratsk: BrSU, 2006 - 807 p.

2. Bolshanin G.A. Correction of the quality of electric energy / G.A. Bolshanin. - Bratsk: State Educational Institution of Higher Professional Education “BrSU”, 2007.- 120 p.

3. Bolshanin G.A. Features of the distribution of electrical energy through a three-wire power line / G.A. Bolshanin, L.Yu. Bolshanina, E.G. Maryasova // Systems. Methods Technologies. - 2011. No3 (11). - S. 82-89.

4. Kerky D. Coordination of the output impedance using fully differential operational amplifiers / D. Kerky // Components and technologies. - 2010. - No. 5. - S.150-154.

5. Kozlov V.A. Conditions for matching a homogeneous three-wire high-voltage power line 10kV and above with a load / V.A. Kozlov, G.A. Bolshanin // Materials of the VII international scientific and practical conference. - Prague: Printing House "Education and Science", 2011. - P.86-90.

6. Kozlov V.A. The agreed mode of operation of a homogeneous three-wire power line / V.A. Kozlov, G.A. Bolshanin // Systems. Methods Technologies. - 2011. - No. 4. - S. 70-76.

7. Kozlov V.A. Coordinated operation mode of a homogeneous three-wire power transmission line of 220 kV and higher as a means of improving the electromagnetic environment / G. Bolshanin // Science today: theoretical aspects and application practice. Part 2: Sat scientific labor. - Tambov: Publishing House of TROO “Business-Science-Society”, 2011. - P.63-66.

8. Kozlov V.A. Terms of coordination of an asymmetric three-phase three-wire high-voltage power line / V.A. Kozlov // Materials of the VIII international scientific-practical conference "The scientific industry of the European continent - 2012". - Prague: Printing House "Education and Science", 2012. - P.63-66.

9. AUTOMATED TECHNOLOGICAL COMPLEX TROLL / ToxSoft JSC // http://new.toxsoft.ru. 05/11/2011.

10. Permission dated 03.04.2007 No. РРС 00-23783 Federal Service for Ecological, Technological and Nuclear Supervision.

11. Certificate of state registration of a computer program No.2010611988 "Calculation of the parameters of a three-phase three-wire uninsulated power line (LEP3 v. 1.00)"

Claims (1)

A method for matching an asymmetric three-phase three-wire power line with an electrical load, which means that the initial information about the voltages and currents in the line through interface devices or sensors is supplied to the processor, characterized in that the conditions for matching an asymmetric three-phase three-wire power line with an electric load are checked in the processor for each wire of the line as a result of comparing the actual and reference values of the load resistance, voltage at the end inii or currents flowing in the load, and generates control signals for the correcting bodies are used as the OLTC power transformers, or automated processing systems or electric drives or sources of active power.

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