CN112531720B - Voltage adjusting method and system based on shale gas exploitation power supply line - Google Patents
Voltage adjusting method and system based on shale gas exploitation power supply line Download PDFInfo
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- CN112531720B CN112531720B CN202011415985.6A CN202011415985A CN112531720B CN 112531720 B CN112531720 B CN 112531720B CN 202011415985 A CN202011415985 A CN 202011415985A CN 112531720 B CN112531720 B CN 112531720B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Abstract
The invention provides a voltage adjusting method and system based on a shale gas exploitation power supply line. The voltage adjusting method based on the shale gas exploitation power supply line comprises the following steps: acquiring power supply line parameters, fracturing load parameters and expected fracturing load access position voltage; determining the outlet voltage of the transformer substation according to the power supply line parameters, the fracturing load parameters and the expected voltage of the fracturing load access position; and adjusting the actual voltage of the fracturing load access position according to the comparison result of the expected voltage of the fracturing load access position and the first preset voltage threshold and the comparison result of the substation outlet voltage and the second preset voltage threshold. The invention can adjust the voltage of the power supply circuit in time and ensure that the voltage level of the mining platform meets the mining requirement.
Description
Technical Field
The invention relates to the technical field of electricity, in particular to a voltage adjusting method and system based on a shale gas exploitation power supply circuit.
Background
The shale gas exploitation platform load mainly comprises a drilling machine, fracturing equipment, post-production equipment and the like, and the load difference of different platforms and different time periods is large. Compared with other loads, the fracturing load has the largest power and the most serious influence on the voltage level of the system, and when the fracturing equipment works, the voltage level of the whole line is possibly reduced, so that the drilling machine and other loads cannot be started, and the shale gas exploitation work is influenced.
Disclosure of Invention
The embodiment of the invention mainly aims to provide a method and a system for adjusting voltage based on a shale gas exploitation power supply circuit, and timely adjust the voltage of the power supply circuit to ensure that the voltage level of an exploitation platform meets exploitation requirements.
In order to achieve the above object, an embodiment of the present invention provides a voltage adjustment method based on a shale gas exploitation power supply line, including:
acquiring power supply line parameters, fracturing load parameters and expected voltage of a fracturing load access position;
determining the outlet voltage of the transformer substation according to the power supply line parameters, the fracturing load parameters and the expected voltage of the fracturing load access position;
and adjusting the actual voltage of the fracturing load access position according to the comparison result of the expected voltage of the fracturing load access position and the first preset voltage threshold and the comparison result of the substation outlet voltage and the second preset voltage threshold.
The embodiment of the invention also provides a voltage adjusting system based on the shale gas exploitation power supply line, which comprises the following steps:
the acquisition unit is used for acquiring power supply line parameters, fracturing load parameters and expected voltage of a fracturing load access position;
the transformer substation outlet voltage unit is used for determining transformer substation outlet voltage according to the power supply line parameters, the fracturing load parameters and expected voltage of the fracturing load access position;
and the voltage adjusting unit is used for adjusting the actual voltage of the fracturing load access position according to the comparison result of the expected voltage of the fracturing load access position and the first preset voltage threshold and the comparison result of the substation outlet voltage and the second preset voltage threshold.
The embodiment of the invention also provides computer equipment which comprises a memory, a processor and a computer program stored on the memory and operated on the processor, wherein the processor executes the computer program to realize the step of the voltage adjusting method based on the shale gas exploitation power supply line.
The embodiment of the invention also provides a computer readable storage medium, on which a computer program is stored, and the computer program is executed by a processor to implement the steps of the voltage regulation method based on the shale gas exploitation power supply line.
According to the voltage adjusting method and system based on the shale gas exploitation power supply circuit, the outlet voltage of the transformer substation is determined according to the power supply circuit parameter, the fracturing load parameter and the expected voltage of the fracturing load access position, the actual voltage of the fracturing load access position is adjusted according to the comparison result of the expected voltage of the fracturing load access position and the first preset voltage threshold and the comparison result of the outlet voltage of the transformer substation and the second preset voltage threshold, the voltage of the power supply circuit can be adjusted in time, and the voltage level of an exploitation platform is guaranteed to meet exploitation requirements.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a flow chart of a method for adjusting voltage based on a shale gas production power supply line in an embodiment of the invention;
FIG. 2 is a flowchart of S103 according to an embodiment of the present invention;
FIG. 3 is a flowchart of S203 according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a model for tuning the main transformer taps of a substation in an embodiment of the present invention;
FIG. 5 is a schematic diagram of a model of an embodiment of the present invention with a line voltage regulator installed;
FIG. 6 is a schematic diagram of a model of adding line series compensation in an embodiment of the present invention;
FIG. 7 is a shale gas production and distribution line diagram;
FIG. 8 is a structural block diagram of a voltage regulation system based on a shale gas production power supply line in an embodiment of the invention;
fig. 9 is a block diagram of a computer device in the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As will be appreciated by one skilled in the art, embodiments of the present invention may be embodied as a system, apparatus, device, method, or computer program product. Accordingly, the present disclosure may be embodied in the form of: entirely hardware, entirely software (including firmware, resident software, micro-code, etc.), or a combination of hardware and software.
In view of the fact that shale gas exploitation is affected by low voltage caused by the operation of fracturing equipment, the embodiment of the invention provides a voltage adjusting method based on a shale gas exploitation power supply line and a method for adjusting the voltage of the power supply line in time, so that the voltage level of an exploitation platform can meet exploitation requirements. The present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 is a flowchart of a voltage adjustment method based on a shale gas production power supply line in an embodiment of the present invention. As shown in fig. 1, the voltage adjustment method based on the shale gas production power supply line includes:
s101: and acquiring parameters of a power supply line, parameters of a fracturing load and expected voltage of the fracturing load access position.
The power supply line parameters comprise power supply line reactance X and power supply line resistance R. The fracturing load parameters comprise fracturing load active power P and fracturing load reactive power Q. Expected voltage of fracturing load access position is U j . Actual voltage U when fracturing load is in an access position x When the voltage is lower than 31.5kV (lower than 90% of the nominal voltage of 35 kV), the shale gas exploitation power supply line is considered to have a low voltage problem, and the actual voltage of the fracturing load access position is adjusted by adopting the method.
S102: and determining the outlet voltage of the transformer substation according to the power supply line parameters, the fracturing load parameters and the expected voltage of the fracturing load access position.
In one embodiment, the substation outlet voltage may be determined by the following equation:
wherein, U i1 For the outlet voltage, U, of the substation j And (3) accessing the expected voltage of the position for the fracturing load, wherein P is the active power of the fracturing load, R is the resistance of a power supply line, Q is the reactive power of the fracturing load, and X is the reactance of the power supply line.
S103: and adjusting the actual voltage of the fracturing load access position according to the comparison result of the expected voltage of the fracturing load access position and the first preset voltage threshold and the comparison result of the substation outlet voltage and the second preset voltage threshold.
In one embodiment, S103 includes: when the expected voltage of the fracturing load access position is larger than or equal to a first preset voltage threshold value and the outlet voltage of the transformer substation is smaller than or equal to a second preset voltage threshold value, the actual voltage of the fracturing load access position is adjusted in a mode of adjusting a tap joint of a main transformer of the transformer substation.
A plurality of 35kV lines exist in a power supply network of the shale gas exploitation platform access system, and the 35kV lines obtain electric energy from 35kV buses of the same transformer substation. Due to the large fracturing loads, the impact of other drilling loads and civil loads on the system voltage level compared to the fracturing load is approximately negligible. For the convenience of analysis, the influence of other loads can not be considered in the analysis and calculation process, and only the 35kV line where the fracturing load is located is considered.
Fig. 4 is a schematic model diagram of adjusting the main transformer taps of a substation in an embodiment of the present invention. As shown in FIG. 4, X 0 Equivalent reactance, U, of 110kV system 0 No load voltage, U, for 110kV systems 1 Is the substation inlet voltage.
In a specific implementation, the first preset voltage threshold may be 31.5kV, and the second preset voltage threshold may be 38.5kV. Expected voltage U when fracturing load is switched on position j Not less than 31.5kV (not less than 90% of the nominal voltage 35 kV) and the outlet voltage U of the transformer substation i1 When the voltage is less than or equal to 38.5kV, the tap joint of the main transformer of the transformer substation can be adjustedAdjusting actual voltage U of fracturing load access position x Until the actual voltage U of the fracturing load access position x Greater than 31.5kV. Wherein, the outlet voltage U of the 110/35kV transformer substation i1 Less than or equal to 38.5kV (namely U) i1 Not exceeding 110% of the nominal voltage 35 kV) considering that there may be multiple 35kV outgoing lines from the 35kV bus of the main transformer, which may carry other civil and industrial loads, etc., if U is i1 A voltage > 38.5kV may affect the proper operation of these loads.
Fig. 2 is a flowchart of S103 according to an embodiment of the present invention. As shown in fig. 2, S103 further includes:
s201: and when the expected voltage of the fracturing load access position is smaller than a first preset voltage threshold or the outlet voltage of the transformer substation is larger than a second preset voltage threshold, determining the outlet voltage of the line voltage regulator according to the power supply line parameter, the fracturing load parameter and the expected voltage of the fracturing load access position.
Fig. 5 is a schematic diagram of a model of an additional line voltage regulator according to an embodiment of the present invention. As shown in FIG. 5, U 2 Is the substation outlet voltage. Expected voltage U when fracturing load is connected to position j Less than 31.5kV or the outlet voltage U of the transformer substation i1 When the voltage is more than 38.5kV, the problem of low voltage of the shale gas exploitation power supply line cannot be solved by adjusting the tap joint of the main transformer of the 110/35kV transformer substation, and the problem of low voltage of the shale gas exploitation power supply line by adjusting the actual voltage of the fracturing load access position in a way of additionally installing a line voltage regulator can be considered.
In one embodiment, the line regulator outlet voltage may be determined by the following equation:
wherein, U i2 Is the line regulator outlet voltage.
S202: and determining the total load module value of the line according to the power supply line parameters, the fracturing load parameters, the short-circuit impedance parameters of the line voltage regulator and the expected voltage of the fracturing load access position.
In specific implementation, the total load module value of the line can be determined by the following formula:
|S|＝|ΔS+P+jQ|；
wherein S is total load of the line, | S | is module value of total load of the line, Δ S is power loss of the transmission line and the line voltage regulator without considering transformer core loss, and the short-circuit impedance parameters of the line voltage regulator include short-circuit resistance and short-circuit reactance (Z) of the line voltage regulator T ＝R T +jX T ) All parameters are parameters reduced to the high-voltage side of the autotransformer (the high-voltage side voltage of the autotransformer is U in FIG. 5) i2 Low voltage side is U 2 )。R T For short-circuit resistors, X, of line regulators T Short-circuit reactance for the line voltage regulator.
S203: and adjusting the actual voltage of the fracturing load access position according to a comparison result of the expected voltage of the fracturing load access position and a first preset voltage threshold, a comparison result of the outlet voltage of the line voltage regulator and a third preset voltage threshold, and a comparison result of the total load module value of the line and the protocol capacity of the line.
In one embodiment, S203 includes: when the expected voltage of the fracturing load access position is larger than or equal to a first preset voltage threshold, the outlet voltage of the line voltage regulator is smaller than or equal to a third preset voltage threshold, and the total load module value of the line is smaller than or equal to the line protocol capacity, the actual voltage of the fracturing load access position is adjusted in a mode that the line voltage regulator is additionally installed at the outlet of the substation.
In specific implementation, the third predetermined voltage threshold is U set Line protocol capacity of S set . Expected voltage U when fracturing load is switched on position j Not less than 31.5kV and line voltage regulator outlet voltage U i2 ≤U set And the total load module value | S | < S | of the circuit set In the process, the actual voltage U of the fracturing load access position can be adjusted in a mode of additionally installing a line voltage regulator at the outlet of the transformer substation x Until the actual voltage of the fracturing load access positionU x Greater than 31.5kV. After the circuit voltage regulator is additionally arranged, the outlet voltage U of the circuit voltage regulator i2 ≤U set In consideration of the fact that the boosting capacity of an actual line pressure regulator product is limited and cannot boost in an infinite manner, and the fact that the line voltage is too high may also bring adverse effects to other shale gas exploitation loads of the same line. U shape set The selection of (a) is adjusted with reference to the above-mentioned actual situation. In addition, the power loss of the line may increase after the line voltage regulator is added, so the total load module value | S | of the line is required not to exceed the line protocol capacity S set 。
Fig. 3 is a flowchart of S203 according to an embodiment of the invention. As shown in fig. 3, S203 further includes:
s301: and when the expected voltage of the fracturing load access position is smaller than a first preset voltage threshold, the outlet voltage of the line voltage regulator is larger than a third preset voltage threshold or the total load module value of the line is larger than the line protocol capacity, determining the line series compensation inlet voltage according to the power supply line parameter, the fracturing load parameter, the line series compensation capacitive reactance and the expected voltage of the fracturing load access position.
When the fracturing load is put into position, the expected voltage U is implemented j Outlet voltage U of < 31.5kV or line voltage regulator i2 ＞U set Or the total load module value of the line is | S | > S set When the shale gas exploitation power supply line voltage regulator is added, the problem that the low voltage of the shale gas exploitation power supply line cannot be solved through the mode of adding the line voltage regulator is shown, and the problem that the low voltage of the shale gas exploitation power supply line can be solved by adjusting the actual voltage of the fracturing load access position through the mode of adding line series compensation can be considered at the moment.
In one embodiment, the line string complement inlet voltage may be determined by the following equation:
wherein, U 2 ' compensating the line string for the inlet voltage, X C And capacitive reactance is compensated for the line series.
S302: and determining the line series compensation degree according to the line series compensation capacitive reactance and the power supply line reactance.
In one embodiment, the line series compensation degree may be determined by the following formula:
k＝(X C /X)×100％；
wherein k is the series compensation degree of the line, and X is the reactance of the power supply line.
S303: and adjusting the actual voltage of the fracturing load access position according to a comparison result of the expected voltage of the fracturing load access position and a first preset voltage threshold, a comparison result of the line series compensation inlet voltage and a fourth preset voltage threshold and a comparison result of the line series compensation degree and a preset series compensation degree threshold.
In one embodiment, S303 includes: when the expected voltage of the fracturing load access position is larger than or equal to a first preset voltage threshold, the voltage of a line series compensation inlet is smaller than or equal to a fourth preset voltage threshold, and the line series compensation degree is smaller than or equal to a preset series compensation degree threshold, the actual voltage of the fracturing load access position is adjusted in a mode that the line series compensation is additionally arranged at an outlet of a transformer substation.
Fig. 6 is a schematic diagram of a model of adding line series compensation in the embodiment of the present invention. As shown in FIG. 6, U i3 Compensating the line string for the outlet voltage, U 2 ' the inlet voltage is compensated for the line string.
In specific implementation, the fourth preset voltage threshold may be 38.5kV, and the preset series compensation threshold may be 50%. Expected voltage U when fracturing load is connected to position j Not less than 31.5kV, line series compensation inlet voltage U 2 When the voltage is not more than 38.5kV and the line series compensation degree k is not more than 50 percent, the actual voltage U of the fracturing load access position can be adjusted by additionally arranging the line series compensation at the outlet of the transformer substation x Until the actual voltage U of the fracturing load access position x Greater than 31.5kV. Wherein, the outlet voltage (line series compensation inlet voltage) U of the 110/35kV transformer substation 2 ' < 38.5kV (i.e. U) 2 ' not exceeding 110% of the nominal voltage 35 kV) taking into account that there may be multiple 35kV outgoing lines from the 35kV bus of the main transformer, which may carry other civil and industrial loads, etc., if U 2 ' > 38.5kV may affect the normal operation of these loads. In addition, the line series compensation degree k is less than or equal to 50% so as to prevent the risk of unstable system operation caused by overhigh series compensation degree.
When the main transformer tap of the transformer substation is adjusted, the line voltage regulator is additionally arranged or the series compensation mode of the line is additionally arranged, the constraint conditions cannot be met, the fracturing load is too large or the grid structure of the system is weak, and the load needs to be reduced or the grid structure of the system needs to be adjusted at the moment.
The execution subject of the voltage regulation method based on the shale gas exploitation power supply line shown in fig. 1 is a computer. As can be seen from the process shown in fig. 1, in the voltage adjustment method based on the shale gas exploitation power supply line according to the embodiment of the present invention, the outlet voltage of the substation is determined according to the power supply line parameter, the fracturing load parameter, and the expected voltage of the fracturing load access position, and then the actual voltage of the fracturing load access position is adjusted according to the comparison result between the expected voltage of the fracturing load access position and the first preset voltage threshold and the comparison result between the outlet voltage of the substation and the second preset voltage threshold, so that the voltage of the power supply line can be adjusted in time, and the voltage level of the exploitation platform is ensured to meet the exploitation requirements.
The specific process of the embodiment of the invention is as follows:
1. the method comprises the steps of obtaining a power supply line parameter, a fracturing load parameter and an expected voltage of a fracturing load access position, and determining an outlet voltage of the transformer substation according to the power supply line parameter, the fracturing load parameter and the expected voltage of the fracturing load access position.
2. And when the expected voltage of the fracturing load access position is greater than or equal to a first preset voltage threshold and the outlet voltage of the transformer substation is less than or equal to a second preset voltage threshold, adjusting the actual voltage of the fracturing load access position in a mode of adjusting a main transformer tap of the transformer substation.
3. And when the expected voltage of the fracturing load access position is smaller than a first preset voltage threshold or the outlet voltage of the transformer substation is larger than a second preset voltage threshold, determining the outlet voltage of the line voltage regulator according to the power supply line parameter, the fracturing load parameter and the expected voltage of the fracturing load access position.
4. And determining the total load module value of the line according to the power supply line parameters, the fracturing load parameters, the short-circuit impedance parameters of the line voltage regulator and the expected voltage of the fracturing load access position.
5. When the expected voltage of the fracturing load access position is larger than or equal to a first preset voltage threshold, the outlet voltage of the line voltage regulator is smaller than or equal to a third preset voltage threshold, and the total load modulus value of the line is smaller than or equal to the line protocol capacity, the actual voltage of the fracturing load access position is adjusted in a mode that the line voltage regulator is additionally arranged at the outlet of the transformer substation.
6. And when the expected voltage of the fracturing load access position is smaller than a first preset voltage threshold, the outlet voltage of the line voltage regulator is larger than a third preset voltage threshold or the total load module value of the line is larger than the line protocol capacity, determining the line series compensation inlet voltage according to the power supply line parameter, the fracturing load parameter, the line series compensation capacitive reactance and the expected voltage of the fracturing load access position.
7. And determining the line series compensation degree according to the line series compensation capacitive reactance and the power supply line reactance.
8. When the expected voltage of the fracturing load access position is larger than or equal to a first preset voltage threshold, the voltage of a line series compensation inlet is smaller than or equal to a fourth preset voltage threshold, and the line series compensation degree is smaller than or equal to a preset series compensation degree threshold, the actual voltage of the fracturing load access position is adjusted in a mode that the line series compensation is additionally arranged at an outlet of a transformer substation.
Figure 7 is a shale gas production and distribution line diagram. As shown in fig. 7, the loads E and F carried by the 35kV second line are shale gas exploitation loads, wherein the load F is a fracturing load, the power is above 20MW, and the voltage level at the position where the load F is connected to the system is lower than 31.5kV; a load, B load, C load and D load carried by 35kV one line are other industrial and civil loads, and the power is low. Therefore, the A load, the B load, the C load, the D load of the first line of 35kV and the E load of the second line of 35kV can be not considered when the process is executed, a formula for solving the low voltage problem of the F load (fracturing load) is established, and a suitable low voltage problem solving method is selected by referring to the process.
In summary, the invention provides a method for solving the low voltage problem aiming at the characteristics of the shale gas exploitation power supply circuit, forms a solution idea for solving the low voltage problem of the shale gas exploitation power supply circuit, provides a criterion for judging whether three solutions of the low voltage problem, namely adjusting a main transformer tap, additionally installing a circuit voltage regulator and additionally installing a circuit series compensation scheme, are applicable or not, has guiding significance for solving the low voltage problem of the actual shale gas exploitation power supply circuit, and can ensure that the voltage level of an exploitation platform meets the exploitation requirements.
Based on the same inventive concept, the embodiment of the invention also provides a voltage adjusting system based on the shale gas exploitation power supply line, and as the principle of solving the problems of the system is similar to the voltage adjusting method based on the shale gas exploitation power supply line, the implementation of the system can refer to the implementation of the method, and repeated parts are not described again.
Fig. 8 is a block diagram of a voltage regulation system based on a shale gas production power supply line in an embodiment of the present invention. As shown in fig. 8, the voltage regulation system based on the shale gas production power supply line includes:
the acquisition unit is used for acquiring power supply line parameters, fracturing load parameters and expected fracturing load access position voltage;
the transformer substation outlet voltage unit is used for determining transformer substation outlet voltage according to the power supply line parameter, the fracturing load parameter and expected voltage of the fracturing load access position;
and the voltage adjusting unit is used for adjusting the actual voltage of the fracturing load access position according to the comparison result of the expected voltage of the fracturing load access position and the first preset voltage threshold and the comparison result of the substation outlet voltage and the second preset voltage threshold.
In one embodiment, the voltage adjustment unit is specifically configured to:
and when the expected voltage of the fracturing load access position is greater than or equal to a first preset voltage threshold and the outlet voltage of the transformer substation is less than or equal to a second preset voltage threshold, adjusting the actual voltage of the fracturing load access position in a mode of adjusting a main transformer tap of the transformer substation.
In one embodiment, the voltage adjustment unit is specifically configured to:
when the expected voltage of the fracturing load access position is smaller than a first preset voltage threshold or the outlet voltage of the transformer substation is larger than a second preset voltage threshold, determining the outlet voltage of the line voltage regulator according to the power supply line parameter, the fracturing load parameter and the expected voltage of the fracturing load access position;
determining a total load module value of the line according to the power supply line parameter, the fracturing load parameter, the short-circuit impedance parameter of the line voltage regulator and the expected voltage of the fracturing load access position;
and adjusting the actual voltage of the fracturing load access position according to a comparison result of the expected voltage of the fracturing load access position and a first preset voltage threshold, a comparison result of the outlet voltage of the line voltage regulator and a third preset voltage threshold, and a comparison result of the total load modulus of the line and the protocol capacity of the line.
In one embodiment, the voltage adjustment unit is specifically configured to:
when the expected voltage of the fracturing load access position is larger than or equal to a first preset voltage threshold, the outlet voltage of the line voltage regulator is smaller than or equal to a third preset voltage threshold, and the total load modulus value of the line is smaller than or equal to the line protocol capacity, the actual voltage of the fracturing load access position is adjusted in a mode that the line voltage regulator is additionally arranged at the outlet of the transformer substation.
In one embodiment, the power supply line parameter comprises power supply line reactance;
the voltage adjustment unit is specifically configured to:
when the expected voltage of the fracturing load access position is smaller than a first preset voltage threshold, the outlet voltage of the line voltage regulator is larger than a third preset voltage threshold or the total load modulus of the line is larger than the line protocol capacity, determining the line series compensation inlet voltage according to the power supply line parameter, the fracturing load parameter, the line series compensation capacitive reactance and the expected voltage of the fracturing load access position;
determining the line series compensation degree according to the line series compensation capacitive reactance and the power supply line reactance;
and adjusting the actual voltage of the fracturing load access position according to the comparison result of the expected voltage of the fracturing load access position and the first preset voltage threshold, the comparison result of the line series compensation inlet voltage and the fourth preset voltage threshold and the comparison result of the line series compensation degree and the preset series compensation degree threshold.
In one embodiment, the voltage adjustment unit is specifically configured to:
when the expected voltage of the fracturing load access position is larger than or equal to a first preset voltage threshold, the voltage of a line series compensation inlet is smaller than or equal to a fourth preset voltage threshold, and the line series compensation degree is smaller than or equal to a preset series compensation degree threshold, the actual voltage of the fracturing load access position is adjusted in a mode that the line series compensation is additionally arranged at an outlet of a transformer substation.
To sum up, the voltage adjusting system based on the shale gas exploitation power supply line in the embodiment of the invention determines the outlet voltage of the transformer substation according to the power supply line parameter, the fracturing load parameter and the expected voltage of the fracturing load access position, and then adjusts the actual voltage of the fracturing load access position according to the comparison result of the expected voltage of the fracturing load access position and the first preset voltage threshold and the comparison result of the outlet voltage of the transformer substation and the second preset voltage threshold, so that the voltage of the power supply line can be adjusted in time, and the voltage level of the exploitation platform is ensured to meet the exploitation requirements.
The embodiment of the invention also provides a specific implementation mode of computer equipment capable of realizing all steps in the voltage adjusting method based on the shale gas exploitation power supply circuit in the embodiment. Fig. 9 is a block diagram of a computer device in an embodiment of the present invention, and referring to fig. 9, the computer device specifically includes the following contents:
a processor (processor) 901 and a memory (memory) 902.
The processor 901 is configured to call a computer program in the memory 902, and when the processor executes the computer program, the processor implements all the steps in the method for adjusting the voltage based on the shale gas exploitation power supply line in the foregoing embodiment, for example, when the processor executes the computer program, the processor implements the following steps:
acquiring power supply line parameters, fracturing load parameters and expected voltage of a fracturing load access position;
determining the outlet voltage of the transformer substation according to the power supply line parameters, the fracturing load parameters and the expected voltage of the fracturing load access position;
and adjusting the actual voltage of the fracturing load access position according to the comparison result of the expected voltage of the fracturing load access position and the first preset voltage threshold and the comparison result of the substation outlet voltage and the second preset voltage threshold.
To sum up, the computer device of the embodiment of the invention determines the outlet voltage of the transformer substation according to the power supply line parameter, the fracturing load parameter and the expected voltage of the fracturing load access position, and then adjusts the actual voltage of the fracturing load access position according to the comparison result of the expected voltage of the fracturing load access position and the first preset voltage threshold and the comparison result of the outlet voltage of the transformer substation and the second preset voltage threshold, so that the voltage of the power supply line can be adjusted in time, and the voltage level of the mining platform is ensured to meet the mining requirements.
An embodiment of the present invention further provides a computer-readable storage medium capable of implementing all the steps of the voltage adjustment method based on the shale gas exploitation power supply line in the foregoing embodiment, where the computer-readable storage medium stores a computer program, and the computer program, when executed by a processor, implements all the steps of the voltage adjustment method based on the shale gas exploitation power supply line in the foregoing embodiment, for example, when the processor executes the computer program, the processor implements the following steps:
acquiring power supply line parameters, fracturing load parameters and expected voltage of a fracturing load access position;
determining the outlet voltage of the transformer substation according to the power supply line parameter, the fracturing load parameter and the expected voltage of the fracturing load access position;
and adjusting the actual voltage of the fracturing load access position according to the comparison result of the expected voltage of the fracturing load access position and the first preset voltage threshold and the comparison result of the substation outlet voltage and the second preset voltage threshold.
To sum up, the computer-readable storage medium of the embodiment of the invention determines the outlet voltage of the substation according to the power supply line parameter, the fracturing load parameter and the expected voltage of the fracturing load access position, and then adjusts the actual voltage of the fracturing load access position according to the comparison result of the expected voltage of the fracturing load access position and the first preset voltage threshold and the comparison result of the outlet voltage of the substation and the second preset voltage threshold, so that the voltage of the power supply line can be adjusted in time, and the voltage level of the mining platform can be ensured to meet the mining requirements.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Those of skill in the art will also appreciate that the various illustrative logical blocks, elements, and steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate the interchangeability of hardware and software, various illustrative components, elements, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design requirements of the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present embodiments.
The various illustrative logical blocks, or units, or devices described in connection with the embodiments disclosed herein may be implemented or performed with a general purpose processor, a digital signal processor, an Application Specific Integrated Circuit (ASIC), a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other similar configuration.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. For example, a storage medium may be coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an ASIC, which may be disposed in a user terminal. In the alternative, the processor and the storage medium may reside as discrete components in a user terminal.
In one or more exemplary designs, the functions described above in connection with the embodiments of the invention may be implemented in hardware, software, firmware, or any combination of the three. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media that facilitate transfer of a computer program from one place to another. Storage media may be any available media that can be accessed by a general purpose or special purpose computer. For example, such computer-readable media can comprise, but is not limited to, RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store program code in the form of instructions or data structures and that can be read by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Additionally, any connection is properly termed a computer-readable medium, and, thus, is included if the software is transmitted from a website, server, or other remote source via a coaxial cable, fiber optic cable, twisted pair, digital Subscriber Line (DSL), or wirelessly, e.g., infrared, radio, and microwave. Such discs (disk) and disks (disc) include compact disks, laser disks, optical disks, DVDs, floppy disks and blu-ray disks, where magnetic discs generally reproduce data magnetically, while disks generally reproduce data optically with lasers. Combinations of the above may also be included in the computer-readable medium.
Claims (12)
1. A voltage adjusting method based on a shale gas exploitation power supply line is characterized by comprising the following steps:
acquiring power supply line parameters, fracturing load parameters and expected voltage of a fracturing load access position;
determining substation outlet voltage according to the power supply line parameters, the fracturing load parameters and the expected voltage of the fracturing load access position;
the substation outlet voltage is determined by the following formula:
wherein, U i1 For the outlet voltage, U, of the substation j The method comprises the steps that a fracturing load is connected to an expected voltage of a position, P is fracturing load active power, R is a power supply line resistor, Q is fracturing load reactive power, and X is a power supply line reactance;
adjusting the actual voltage of the fracturing load access position according to the comparison result of the expected voltage of the fracturing load access position and a first preset voltage threshold and the comparison result of the substation outlet voltage and a second preset voltage threshold;
according to the comparison result of the expected voltage of the fracturing load access position and a first preset voltage threshold value and the comparison result of the substation outlet voltage and a second preset voltage threshold value, adjusting the actual voltage of the fracturing load access position comprises the following steps:
when the expected voltage of the fracturing load access position is smaller than the first preset voltage threshold or the outlet voltage of the transformer substation is larger than the second preset voltage threshold, determining the outlet voltage of a line voltage regulator according to the power supply line parameter, the fracturing load parameter and the expected voltage of the fracturing load access position;
determining a total load module value of the line according to the power supply line parameter, the fracturing load parameter, the short-circuit impedance parameter of the line voltage regulator and the expected voltage of the fracturing load access position;
and adjusting the actual voltage of the fracturing load access position according to the comparison result of the expected voltage of the fracturing load access position and a first preset voltage threshold, the comparison result of the outlet voltage of the line voltage regulator and a third preset voltage threshold, and the comparison result of the total load module value of the line and the protocol capacity of the line.
2. The voltage adjusting method based on the shale gas exploitation power supply line according to claim 1, wherein according to a comparison result of the expected voltage of the fracturing load access position and a first preset voltage threshold and a comparison result of the substation outlet voltage and a second preset voltage threshold, adjusting the actual voltage of the fracturing load access position comprises:
when the expected voltage of the fracturing load access position is larger than or equal to the first preset voltage threshold value and the substation outlet voltage is smaller than or equal to the second preset voltage threshold value, the actual voltage of the fracturing load access position is adjusted in a mode of adjusting a main transformer tap of a substation.
3. The voltage adjusting method based on the shale gas exploitation power supply line according to claim 1, wherein adjusting the actual voltage of the fracturing load access position according to the comparison result of the expected voltage of the fracturing load access position and a first preset voltage threshold, the comparison result of the outlet voltage of the line voltage regulator and a third preset voltage threshold, and the comparison result of the total load modulus of the line and the line protocol capacity comprises:
when the expected voltage of the fracturing load access position is larger than or equal to the first preset voltage threshold, the outlet voltage of the line voltage regulator is smaller than or equal to the third preset voltage threshold, and the total load modulus of the line is smaller than or equal to the line protocol capacity, the actual voltage of the fracturing load access position is adjusted in a mode that the line voltage regulator is additionally arranged at the outlet of the transformer substation.
4. The shale gas production power supply line-based voltage adjustment method of claim 1, wherein the power supply line parameters comprise power supply line reactance;
according to the comparison result of the expected voltage of the fracturing load access position and a first preset voltage threshold, the comparison result of the outlet voltage of the line voltage regulator and a third preset voltage threshold and the comparison result of the total load modulus value of the line and the protocol capacity of the line, adjusting the actual voltage of the fracturing load access position comprises the following steps:
when the expected voltage of the fracturing load access position is smaller than the first preset voltage threshold, the outlet voltage of the line voltage regulator is larger than the third preset voltage threshold or the total load modulus of the line is larger than the line protocol capacity, determining a line series compensation inlet voltage according to the power supply line parameter, the fracturing load parameter, the line series compensation capacitive reactance and the expected voltage of the fracturing load access position;
determining the line series compensation degree according to the line series compensation capacitive reactance and the power supply line reactance;
and adjusting the actual voltage of the fracturing load access position according to the comparison result of the expected voltage of the fracturing load access position and a first preset voltage threshold, the comparison result of the line series compensation inlet voltage and a fourth preset voltage threshold and the comparison result of the line series compensation degree and a preset series compensation degree threshold.
5. The voltage adjusting method based on the shale gas exploitation power supply line according to claim 4, wherein adjusting the actual voltage of the fracturing load access position according to the comparison result of the expected voltage of the fracturing load access position and a first preset voltage threshold, the comparison result of the line series compensation inlet voltage and a fourth preset voltage threshold, and the comparison result of the line series compensation degree and a preset series compensation degree threshold comprises:
when the expected voltage of the fracturing load access position is larger than or equal to the first preset voltage threshold, the line series compensation inlet voltage is smaller than or equal to the fourth preset voltage threshold, and the line series compensation degree is smaller than or equal to the preset series compensation degree threshold, the actual voltage of the fracturing load access position is adjusted in a mode of additionally installing line series compensation at an outlet of a transformer substation.
6. The utility model provides a voltage adjustment system based on shale gas exploitation power supply line which characterized in that includes:
the acquisition unit is used for acquiring power supply line parameters, fracturing load parameters and expected fracturing load access position voltage;
the transformer substation outlet voltage unit is used for determining transformer substation outlet voltage according to the power supply line parameters, the fracturing load parameters and expected voltage of the fracturing load access position;
the substation outlet voltage is determined by the following formula:
wherein, U i1 For the outlet voltage of the substation, U j The method comprises the steps that a fracturing load is connected to an expected voltage of a position, P is fracturing load active power, R is a power supply line resistor, Q is fracturing load reactive power, and X is a power supply line reactance;
the voltage adjusting unit is used for adjusting the actual voltage of the fracturing load access position according to a comparison result of the expected voltage of the fracturing load access position and a first preset voltage threshold and a comparison result of the substation outlet voltage and a second preset voltage threshold;
the voltage adjustment unit is specifically configured to:
when the expected voltage of the fracturing load access position is smaller than the first preset voltage threshold value or the outlet voltage of the transformer substation is larger than the second preset voltage threshold value, determining the outlet voltage of a line voltage regulator according to the power supply line parameter, the fracturing load parameter and the expected voltage of the fracturing load access position;
determining a total load module value of the line according to the power supply line parameter, the fracturing load parameter, the short-circuit impedance parameter of the line voltage regulator and the expected voltage of the fracturing load access position;
and adjusting the actual voltage of the fracturing load access position according to the comparison result of the expected voltage of the fracturing load access position and a first preset voltage threshold, the comparison result of the outlet voltage of the line voltage regulator and a third preset voltage threshold and the comparison result of the total load modulus value of the line and the protocol capacity of the line.
7. The shale gas production power supply line-based voltage adjustment system of claim 6, wherein the voltage adjustment unit is specifically configured to:
when the expected voltage of the fracturing load access position is larger than or equal to the first preset voltage threshold value and the substation outlet voltage is smaller than or equal to the second preset voltage threshold value, the actual voltage of the fracturing load access position is adjusted in a mode of adjusting a main transformer tap of a substation.
8. The shale gas production power supply line-based voltage adjustment system of claim 6, wherein the voltage adjustment unit is specifically configured to:
when the expected voltage of the fracturing load access position is larger than or equal to the first preset voltage threshold, the outlet voltage of the line voltage regulator is smaller than or equal to the third preset voltage threshold, and the total load modulus of the line is smaller than or equal to the line protocol capacity, the actual voltage of the fracturing load access position is adjusted in a mode that the line voltage regulator is additionally arranged at the outlet of the transformer substation.
9. The shale gas production power supply line based voltage regulation system of claim 6, wherein the power supply line parameter comprises power supply line reactance;
the voltage adjustment unit is specifically configured to:
when the expected voltage of the fracturing load access position is smaller than the first preset voltage threshold, the outlet voltage of the line voltage regulator is larger than the third preset voltage threshold or the total load module value of the line is larger than the line protocol capacity, determining the line series compensation inlet voltage according to the power supply line parameter, the fracturing load parameter, the line series compensation capacitive reactance and the expected voltage of the fracturing load access position;
determining the line series compensation degree according to the line series compensation capacitive reactance and the power supply line reactance;
and adjusting the actual voltage of the fracturing load access position according to the comparison result of the expected voltage of the fracturing load access position and a first preset voltage threshold, the comparison result of the line series compensation inlet voltage and a fourth preset voltage threshold and the comparison result of the line series compensation degree and a preset series compensation degree threshold.
10. The shale gas production power supply line-based voltage adjustment system of claim 9, wherein the voltage adjustment unit is specifically configured to:
when the expected voltage of the fracturing load access position is larger than or equal to the first preset voltage threshold, the line series compensation inlet voltage is smaller than or equal to the fourth preset voltage threshold, and the line series compensation degree is smaller than or equal to the preset series compensation degree threshold, the actual voltage of the fracturing load access position is adjusted in a mode of additionally installing line series compensation at an outlet of a transformer substation.
11. A computer device comprising a memory, a processor and a computer program stored on the memory and running on the processor, wherein the processor when executing the computer program implements the steps of the method for adjusting voltage based on a shale gas production power supply line according to any of claims 1 to 5.
12. A computer-readable storage medium, on which a computer program is stored, wherein the computer program, when being executed by a processor, implements the steps of the method for adjusting voltage based on a shale gas production power supply line according to any one of claims 1 to 5.
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| CN202011415985.6A CN112531720B (en) | 2020-12-07 | 2020-12-07 | Voltage adjusting method and system based on shale gas exploitation power supply line |
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| CN106505577A (en) * | 2016-11-16 | 2017-03-15 | 合肥普望电子有限责任公司 | A kind of power distribution network low-voltage pressure regulation method |
| CN107809114A (en) * | 2017-09-20 | 2018-03-16 | 国家电网公司 | Line voltage Automatic adjustment method |
| CN208986608U (en) * | 2019-03-12 | 2019-06-14 | 国网山东省电力公司德州市陵城区供电公司 | A kind of low-voltage circuit pressure regulator |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106505577A (en) * | 2016-11-16 | 2017-03-15 | 合肥普望电子有限责任公司 | A kind of power distribution network low-voltage pressure regulation method |
| CN107809114A (en) * | 2017-09-20 | 2018-03-16 | 国家电网公司 | Line voltage Automatic adjustment method |
| CN208986608U (en) * | 2019-03-12 | 2019-06-14 | 国网山东省电力公司德州市陵城区供电公司 | A kind of low-voltage circuit pressure regulator |
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