CN113283204B - Electromagnetic transient modeling method and system for on-load voltage regulation controller - Google Patents
Electromagnetic transient modeling method and system for on-load voltage regulation controller Download PDFInfo
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- CN113283204B CN113283204B CN202110547976.0A CN202110547976A CN113283204B CN 113283204 B CN113283204 B CN 113283204B CN 202110547976 A CN202110547976 A CN 202110547976A CN 113283204 B CN113283204 B CN 113283204B
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Abstract
The invention provides an electromagnetic transient modeling method and system of an on-load voltage regulation controller, wherein the method comprises the following steps: establishing a three-phase transformer circuit model according to the structure and the parameters of the single-phase transformer; establishing a positive and negative regulation switch circuit model according to a positive and negative regulation switch principle; establishing an on-load tap-changer circuit model according to an on-load tap-changer principle; and connecting the three-phase transformer circuit model, the positive and negative regulation switch circuit model and the on-load tap-changer circuit model to obtain an on-load voltage regulation controller model. The invention can simulate the positive and negative regulation of the transformation ratio and the on-load regulation process of the on-load voltage regulation controller of the transformer at the same time, and is convenient for the electromagnetic transient process research of the power system.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to an electromagnetic transient modeling method and system for an on-load voltage regulation controller.
Background
Transformers are important devices in power systems that transfer energy from one side to another using the principle of electromagnetic induction, often used as connections for lines of different voltage classes. Generally, a transformer has several taps on one side (typically the high voltage side) as required by the operating conditions to meet different transformation ratio requirements. In practical engineering, the transformer adjusts the transformation ratio more frequently, and the transformation ratio of the transformer is also a parameter for controlling the power system, and participates in the control and regulation of power and voltage. The transformer is divided into no-load voltage-regulating transformer and on-load voltage-regulating transformer according to whether the regulation transformation ratio can be adjusted under the condition of on-load. When the on-load tap changer is used for adjusting the transformation ratio, the continuous transmission of power can be realized, and the continuous work of a line is maintained.
The existing on-load tap changing transformer transformation ratio adjusting model is simple in foundation, cannot simulate the dynamic process of tap changing, and cannot realize electromagnetic transient modeling in the on-load tap changing process.
Disclosure of Invention
The invention provides an electromagnetic transient modeling method of an on-load voltage regulation controller, which realizes positive and negative regulation of transformation ratio and on-load regulation at the same time, and aims to establish an on-load voltage regulation controller model to facilitate the research of the transient process of a power system.
The invention provides an electromagnetic transient modeling method of an on-load voltage regulation controller, which comprises the following steps:
establishing a three-phase transformer circuit model according to the structure of the single-phase transformer and the parameters of the single-phase transformer;
establishing a positive and negative regulation switch circuit model according to a positive and negative regulation switch principle;
establishing an on-load tap-changer circuit model according to an on-load tap-changer principle;
connecting the three-phase transformer circuit model, the positive and negative regulation switch circuit model and the on-load tap-changer circuit model to obtain an on-load voltage regulation controller model;
the output end of the three-phase transformer circuit model is connected with the input end of the on-load tap-changer circuit model, the output end of the on-load tap-changer circuit model is connected with the input end of the positive and negative regulation switch circuit model, and the output end of the positive and negative regulation switch circuit model is the input end of the on-load voltage regulation controller model.
Further, the electromagnetic transient modeling method for the on-load voltage regulation controller further includes:
establishing a timing circuit breaker circuit model according to a timing circuit breaker circuit principle;
and the output end of the timing circuit breaker circuit model is connected with the input end of the positive and negative regulation switch circuit model.
Further, the three-phase transformer circuit model includes: a first phase input, a second phase input, a third phase input, a first transformation ratio signal, a second transformation ratio signal, a first transformer, a second transformer, a third transformer, a fourth transformer, a fifth transformer and a sixth transformer; the first phase input and the first transformation ratio signal are connected with the input end of the first transformer; the first phase input and the second transformation ratio signal are connected with the input end of the second transformer; the second phase input and the first transformation ratio signal are connected with the input end of the third transformer; the second phase input and the second transformation ratio signal are connected with the input end of the fourth transformer; the third phase input and the first transformation ratio signal are connected with the input end of the fifth transformer; the third phase input and the second transformation ratio signal are connected with the input end of the sixth transformer.
Further, the on-load tap changer circuit model comprises: the first load switch, the second load switch and the third load switch; the first output end of the first transformer and the first output end of the second transformer are connected with the input end of the first on-load switch, the first output end of the third transformer and the first output end of the fourth transformer are connected with the input end of the second on-load switch, and the first output end of the fifth transformer and the first output end of the sixth transformer are connected with the input end of the third on-load switch.
Further, the positive and negative regulation switch circuit model comprises: the first positive and negative regulating switch, the second positive and negative regulating switch and the third positive and negative regulating switch; the second output end of the first transformer, the second output end of the second transformer and the output end of the first on-load switch are connected with the input end of the first positive and negative regulating switch, the second output end of the third transformer, the second output end of the fourth transformer and the output end of the second on-load switch are connected with the input end of the second positive and negative regulating switch, and the second output end of the fourth transformer, the second output end of the fifth transformer and the output end of the third on-load switch are connected with the input end of the third positive and negative regulating switch.
Further, the on-load tap-changing controller model further comprises: a timed circuit breaker circuit model;
wherein the timed circuit breaker circuit model comprises: a first, a second and a third timing breaker;
the input end of the first timing circuit breaker is connected with a first phase input, and the output end of the first timing circuit breaker is connected with the input end of the first positive and negative regulating switch; the input end of the second timing circuit breaker is connected with a second phase input, and the output end of the second timing circuit breaker is connected with the input end of a second positive and negative regulating switch; the input end of the third timing circuit breaker is connected with a third phase input, and the output end of the third timing circuit breaker is connected with the input end of a third positive and negative regulating switch.
Further, the value ranges of the first and second variable-ratio signals are [ -1,1], wherein the first and second variable-ratio signals are in positive adjustment when taking a positive value, and in negative adjustment when taking a negative value.
The second aspect of the present invention further provides an electromagnetic transient modeling system for an on-load tap changer controller, including:
the three-phase transformer circuit model establishing module is used for establishing a three-phase transformer circuit model according to the single-phase transformer structure and the single-phase transformer parameters;
the positive and negative regulation switch circuit model establishing module is used for establishing a positive and negative regulation switch circuit model according to a positive and negative regulation switch principle;
the on-load tap-changer circuit model establishing module is used for establishing an on-load tap-changer circuit model according to the on-load tap-changer principle;
the on-load voltage regulation controller model establishing module is used for connecting the three-phase transformer circuit model, the positive and negative regulation switch circuit model and the on-load tap-changer circuit model to obtain an on-load voltage regulation controller model;
the output end of the three-phase transformer circuit model is connected with the input end of the on-load tap-changer circuit model, the output end of the on-load tap-changer circuit model is connected with the input end of the positive and negative regulation switch circuit model, and the output end of the positive and negative regulation switch circuit model is the input end of the on-load voltage regulation controller model.
Further, the electromagnetic transient modeling system of the on-load tap changer further includes:
a timed circuit breaker circuit model building module for: establishing a timing circuit breaker circuit model according to a timing circuit breaker circuit principle;
and the output end of the timing circuit breaker circuit model is connected with the input end of the positive and negative regulation switch circuit model.
Further, the three-phase transformer circuit model includes: a first phase input, a second phase input, a third phase input, a first transformation ratio signal, a second transformation ratio signal, a first transformer, a second transformer, a third transformer, a fourth transformer, a fifth transformer and a sixth transformer; the first phase input and the first transformation ratio signal are connected with the input end of the first transformer; the first phase input and the second transformation ratio signal are connected with the input end of the second transformer; the second phase input and the first transformation ratio signal are connected with the input end of the third transformer; the second phase input and the second transformation ratio signal are connected with the input end of the fourth transformer; the third phase input and the first transformation ratio signal are connected with the input end of the fifth transformer; the third phase input and the second transformation ratio signal are connected with the input end of the sixth transformer.
Further, the on-load tap changer circuit model comprises: the first load switch, the second load switch and the third load switch; the first output end of the first transformer and the first output end of the second transformer are connected with the input end of the first on-load switch, the first output end of the third transformer and the first output end of the fourth transformer are connected with the input end of the second on-load switch, and the first output end of the fifth transformer and the first output end of the sixth transformer are connected with the input end of the third on-load switch.
Further, the positive and negative regulation switch circuit model comprises: the first positive and negative regulating switch, the second positive and negative regulating switch and the third positive and negative regulating switch; the second output end of the first transformer, the second output end of the second transformer and the output end of the first on-load switch are connected with the input end of the first positive and negative regulating switch, the second output end of the third transformer, the second output end of the fourth transformer and the output end of the second on-load switch are connected with the input end of the second positive and negative regulating switch, and the second output end of the fourth transformer, the second output end of the fifth transformer and the output end of the third on-load switch are connected with the input end of the third positive and negative regulating switch.
Further, the on-load tap-changing controller model further comprises: a timed circuit breaker circuit model;
wherein the timed circuit breaker circuit model comprises: a first, a second and a third timing breaker;
the input end of the first timing circuit breaker is connected with a first phase input, and the output end of the first timing circuit breaker is connected with the input end of a first positive and negative regulating switch; the input end of the second timing circuit breaker is connected with a second phase input, and the output end of the second timing circuit breaker is connected with the input end of a second positive and negative regulating switch; the input end of the third timing circuit breaker is connected with a third phase input, and the output end of the third timing circuit breaker is connected with the input end of a third positive and negative regulating switch.
Further, the value ranges of the first and second variable-ratio signals are [ -1,1], wherein the first and second variable-ratio signals are in positive adjustment when taking a positive value, and in negative adjustment when taking a negative value.
Compared with the prior art, the embodiment of the invention has the beneficial effects that:
the invention provides an electromagnetic transient modeling method and system of an on-load voltage regulation controller, wherein the method comprises the following steps: establishing a three-phase transformer circuit model according to the structure and the parameters of the single-phase transformer; establishing a positive and negative regulation switch circuit model according to a positive and negative regulation switch principle; establishing an on-load tap-changer circuit model according to an on-load tap-changer principle; connecting the three-phase transformer circuit model, the positive and negative regulation switch circuit model and the on-load tap-changer circuit model to obtain an on-load voltage regulation controller model; the output end of the three-phase transformer circuit model is connected with the input end of the on-load tap-changer circuit model, the output end of the on-load tap-changer circuit model is connected with the input end of the positive and negative regulation switch circuit model, and the output end of the positive and negative regulation switch circuit model is the input end of the on-load voltage regulation controller model. The invention simulates the adjusting process of the on-load tap-changer to meet the transient research requirement of the power system; meanwhile, a loaded voltage regulation controller model is established to realize positive and negative regulation switches existing in an actual transformer model, and simultaneously realize positive and negative regulation and loaded regulation of the transformation ratio, so that transient state research of a power system is facilitated.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described 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 according to the drawings without creative efforts.
Fig. 1 is a flowchart of an electromagnetic transient modeling method for an on-load tap changer according to an embodiment of the present invention;
fig. 2 is a diagram of an on-load tap changer according to an embodiment of the present invention;
fig. 3 is a flow chart of electromagnetic transient modeling of an on-load tap changer controller according to another embodiment of the present invention;
FIG. 4 is a diagram of a three-phase system provided by one embodiment of the present invention;
FIG. 5 is a schematic diagram of a positive and negative adjustment switch provided in accordance with an embodiment of the present invention;
FIG. 6 is a block diagram of a forward/reverse adjustment switch model according to an embodiment of the present invention;
FIG. 7 is an external connection diagram of a positive and negative adjustment switch according to an embodiment of the present invention;
fig. 8 is a schematic diagram of an on-load tap changer according to an embodiment of the present invention;
fig. 9 is a diagram of a model on-load tap changer according to an embodiment of the present invention;
fig. 10 is a diagram of an external connection for an on-load tap changer according to one embodiment of the present invention;
fig. 11 is a diagram of a model of an on-load tap changer according to an embodiment of the present invention;
FIG. 12 is a control panel diagram of a ratio signal provided by one embodiment of the present invention;
fig. 13 is an apparatus diagram of an electromagnetic transient modeling system for an on-load tap changer according to an embodiment of the present invention;
fig. 14 is a block diagram of an electronic device according to an 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 obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
It should be understood that the step numbers used herein are for convenience of description only and are not intended as limitations on the order in which the steps are performed.
It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The terms "comprises" and "comprising" indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The term "and/or" refers to and includes any and all possible combinations of one or more of the associated listed items.
A first aspect.
Referring to fig. 1-2, an embodiment of the invention provides an electromagnetic transient modeling method for an on-load voltage regulation controller, including:
and S10, establishing a three-phase transformer circuit model according to the single-phase transformer structure and the single-phase transformer parameters.
In one embodiment, the three-phase transformer circuit model includes: a first phase input, a second phase input, a third phase input, a first transformation ratio signal, a second transformation ratio signal, a first transformer, a second transformer, a third transformer, a fourth transformer, a fifth transformer and a sixth transformer; the first phase input and the first transformation ratio signal are connected with the input end of the first transformer; the first phase input and the second transformation ratio signal are connected with the input end of the second transformer; the second phase input and the first transformation ratio signal are connected with the input end of the third transformer; the second phase input and the second transformation ratio signal are connected with the input end of the fourth transformer; the third phase input and the first transformation ratio signal are connected with the input end of the fifth transformer; the third phase input and the second transformation ratio signal are connected with the input end of the sixth transformer.
In another specific embodiment, the first and second variable-ratio signals have a range of [ -1,1], wherein the first and second variable-ratio signals are adjusted positively and inversely when the first and second variable-ratio signals are adjusted negatively.
And S20, establishing a positive and negative regulation switch circuit model according to the positive and negative regulation switch principle.
In one embodiment, the on-load tap changer circuit model comprises: the first load switch, the second load switch and the third load switch.
And S30, establishing an on-load tap-changer circuit model according to the on-load tap-changer principle.
In one embodiment, the forward/reverse adjustment switch circuit model includes: the first positive and negative regulating switch, the second positive and negative regulating switch and the third positive and negative regulating switch.
S40, connecting the three-phase transformer circuit model, the positive and negative regulation switch circuit model and the on-load tap-changer circuit model to obtain an on-load voltage regulation controller model; specifically, the output end of the three-phase transformer circuit model is connected with the input end of the on-load tap-changer circuit model, the output end of the on-load tap-changer circuit model is connected with the input end of the positive and negative regulation switch circuit model, and the output end of the positive and negative regulation switch circuit model is the input end of the on-load voltage regulation controller model.
In one embodiment, the first output terminal of the first transformer and the first output terminal of the second transformer are connected to the input terminal of the first on-load switch, the first output terminal of the third transformer and the first output terminal of the fourth transformer are connected to the input terminal of the second on-load switch, and the first output terminal of the fifth transformer and the first output terminal of the sixth transformer are connected to the input terminal of the third on-load switch.
The second output end of the first transformer, the second output end of the second transformer and the output end of the first on-load switch are connected with the input end of the first positive and negative regulating switch, the second output end of the third transformer, the second output end of the fourth transformer and the output end of the second on-load switch are connected with the input end of the second positive and negative regulating switch, and the second output end of the fourth transformer, the second output end of the fifth transformer and the output end of the third on-load switch are connected with the input end of the third positive and negative regulating switch.
In a specific embodiment, the electromagnetic transient modeling method for an on-load tap changer controller further includes:
establishing a timing circuit breaker circuit model according to a timing circuit breaker circuit principle; and the output end of the timing circuit breaker circuit model is connected with the input end of the positive and negative regulation switch circuit model.
In a specific embodiment, the on-load tap-changing controller model further includes: a timed circuit breaker circuit model;
wherein the timed breaker circuit model comprises: a first, a second and a third timing breaker;
the input end of the first timing circuit breaker is connected with a first phase input, and the output end of the first timing circuit breaker is connected with the input end of a first positive and negative regulating switch; the input end of the second timing circuit breaker is connected with a second phase input, and the output end of the second timing circuit breaker is connected with the input end of a second positive and negative regulating switch; the input end of the third timing circuit breaker is connected with a third phase input, and the output end of the third timing circuit breaker is connected with the input end of a third positive and negative regulating switch.
The invention simulates the adjusting process of the on-load tap-changer to meet the transient research requirement of the power system; meanwhile, a loaded voltage regulation controller model is established to realize positive and negative regulation switches existing in an actual transformer model, and meanwhile, positive and negative regulation and loaded regulation of the transformation ratio are realized, so that transient state research of a power system is facilitated.
Please refer to fig. 3-12. It should be noted that fig. 3 is a flowchart of electromagnetic transient modeling of the on-load tap-changing controller; FIG. 4 is a three-phase system diagram of the present invention, each phase having a single phase transformer with a tap controlling the ratio K (0. ltoreq. K.ltoreq.1) as the input ratio signal; FIG. 5 is a schematic diagram of a forward/backward adjustment switch of the present invention, which uses the secondary side outlet of the transformer as input, and selects different paths according to the transformation ratio signal K (-1 ≦ K ≦ 1) to achieve forward/backward adjustment; FIG. 6 is a schematic diagram of a forward/reverse adjustment switch of the present invention, which is an embodiment of the forward/reverse adjustment switch principle shown in FIG. 4 in an electromagnetic transient software. A Breaker (BRK) controlled by a variable ratio signal K (-1 is more than or equal to K and less than or equal to 1) is used as a path selection switch to simulate different on-off states. The relationship between the labels and the corresponding quantities in a certain electromagnetic transient software model diagram is shown in table 1. FIG. 7 is an external connection diagram of the positive and negative adjustment switch of the present invention, showing the connection relationship of the positive and negative adjustment switch in the three-phase system, since the ratio signal K (-1. ltoreq. K.ltoreq.1) can take a negative value at this time, the absolute value of K is taken before K is inputted into the single-phase transformer; fig. 8 is a schematic diagram of the on-load tap changer of the present invention, mainly including two parts of gear selection and switching action. Fig. 9 is a model diagram of an on-load tap-changer of the present invention, which is an embodiment in an electromagnetic transient software according to the on-load tap-changer principle shown in fig. 7. The switching action is realized by means of a circuit Breaker (BRK) controlled by timing Breaker Logic (time Breaker Logic), and time parameters of the on-load tap-changer adjusting process, namely the closing and opening moments of the circuit breakers BRK1, BRK2, BRK3 and BRK4, can be given in the timing Breaker Logic; fig. 10 is an external connection diagram of the on-load tap changer according to the invention, with gear selection being achieved by means of two identical single-phase transformers, i.e. the ratio signals K1, K2; fig. 11 is a diagram of an on-load tap changer model according to the present invention, in an embodiment of an electromagnetic transient software according to the present invention. OLTC is a packaged on-load tap-changer model, Positive and negative adjustment switch is a packaged Positive and negative adjustment switch model, and a final on-load voltage regulation controller model is established by combining a three-phase system model. The time parameter of the on-load tap-changer adjusting process is changed into external input, so that the universal application is facilitated, wherein: t1 is the disconnection time of BRK1, T21 and T22 are the closing and disconnection times of BRK2, T31 and T32 are the closing and disconnection times of BRK3, T4 is the closing time of BRK4, and in addition, a switching time parameter Tch of the positive and negative regulating switch is required to be provided according to the regulating process; fig. 12 is a diagram of a K1, K2 control panel of the present invention for load tap changing depending on the gear selected.
TABLE 1 relationship between tags and corresponding quantities in certain electromagnetic transient software
In a specific embodiment, the present invention provides an electromagnetic transient modeling method for an on-load tap changer controller, including the following steps:
step 3, establishing an on-load tap-changer model;
and 4, establishing an on-load voltage regulation controller model according to the step 2 and the step 3.
The step 2 specifically comprises the following steps:
step 21, establishing a custom module to realize positive and negative regulation (the principle is shown in fig. 7), and obtaining a positive and negative regulation switch model as shown in fig. 8, wherein the transformation ratio signal K can be a negative value, the value range is changed from K being more than or equal to 0 and less than or equal to 1 to K being more than or equal to-1 and less than or equal to 1, and the transformation ratio signal K is positive regulation when taking a positive value; negative values are used for inverse regulation.
And step 22, establishing external connection of the positive and negative regulation switch model according to the step 1 and the step 21, as shown in figure 9.
The step 3 specifically comprises the following steps:
step 31, establishing a custom module to realize load regulation (the principle is shown in fig. 10), and obtaining an on-load tap-changer model shown in fig. 11. The tap changing time parameter of the on-load tap changer is given by a Timed Breaker Logic (time Breaker Logic) and is an internal set value. Wherein: t1 is the opening time of BRK1, T21 and T22 are the closing and opening times of BRK2, T31 and T32 are the closing and opening times of BRK3, and T4 is the closing time of BRK4, and satisfies the following conditions: t21< T1< T31< T22< T4< T32.
Step 32, according to step 1 and step 31, establishes an external connection of the on-load tap-changer model, as shown in fig. 12. The gear selection, i.e. the ratio signals K1, K2, is carried out by means of two identical single-phase transformers.
The step 4 specifically comprises the following steps:
and step 41, establishing an on-load voltage regulation controller model according to the step 2 and the step 3, as shown in fig. 13. At this time, the tap changing operation panels, i.e., the control panels of K1 and K2, may be set to the forward and reverse gears, as shown in fig. 14.
Step 42, changing the tap changing time parameter of the on-load tap changer into an external input for convenient application, as shown in fig. 13. It should be noted that the switching time parameter Tch of the positive and negative regulation switches is given according to the regulation process.
According to the electromagnetic transient modeling method for the on-load voltage regulation controller, the on-load voltage regulation controller model is established, so that positive and negative regulation and on-load regulation of the transformation ratio are realized at the same time, and support is provided for transient research of a power system.
A second aspect.
Referring to fig. 13, an embodiment of the invention provides an electromagnetic transient modeling system of an on-load voltage regulation controller, including:
and the three-phase transformer circuit model establishing module 10 is used for establishing a three-phase transformer circuit model according to the single-phase transformer structure and the single-phase transformer parameters.
In one embodiment, the three-phase transformer circuit model includes: a first phase input, a second phase input, a third phase input, a first transformation ratio signal, a second transformation ratio signal, a first transformer, a second transformer, a third transformer, a fourth transformer, a fifth transformer and a sixth transformer; the first phase input and the first transformation ratio signal are connected with the input end of the first transformer; the first phase input and the second transformation ratio signal are connected with the input end of the second transformer; the second phase input and the first transformation ratio signal are connected with the input end of the third transformer; the second phase input and the second transformation ratio signal are connected with the input end of the fourth transformer; the third phase input and the first transformation ratio signal are connected with the input end of the fifth transformer; the third phase input and the second transformation ratio signal are connected with the input end of the sixth transformer.
In another specific embodiment, the first and second variable-ratio signals have a range of [ -1,1], wherein the first and second variable-ratio signals are adjusted positively and inversely when the first and second variable-ratio signals are adjusted negatively.
And the positive and negative regulation switch circuit model establishing module 20 is used for establishing a positive and negative regulation switch circuit model according to the positive and negative regulation switch principle.
In one embodiment, the on-load tap changer circuit model comprises: the first load switch, the second load switch and the third load switch.
An on-load tap-changer circuit model establishing module 30 is used for establishing an on-load tap-changer circuit model according to the on-load tap-changer principle.
In one embodiment, the positive and negative regulation switch circuit model includes: the first positive and negative regulating switch, the second positive and negative regulating switch and the third positive and negative regulating switch.
The on-load voltage regulation controller model establishing module is used for connecting the three-phase transformer circuit model, the positive and negative regulation switch circuit model and the on-load tap-changer circuit model to obtain an on-load voltage regulation controller model; specifically, the output end of the three-phase transformer circuit model is connected with the input end of the on-load tap-changer circuit model, the output end of the on-load tap-changer circuit model is connected with the input end of the positive and negative regulation switch circuit model, and the output end of the positive and negative regulation switch circuit model is the input end of the on-load voltage regulation controller model.
In a specific embodiment, the electromagnetic transient modeling system for an on-load tap changer controller further includes:
the circuit model establishing module of the timing circuit breaker is used for establishing a circuit model of the timing circuit breaker according to the circuit principle of the timing circuit breaker; and the output end of the timing circuit breaker circuit model is connected with the input end of the positive and negative regulation switch circuit model.
In one embodiment, the first output terminal of the first transformer and the first output terminal of the second transformer are connected to the input terminal of the first on-load switch, the first output terminal of the third transformer and the first output terminal of the fourth transformer are connected to the input terminal of the second on-load switch, and the first output terminal of the fifth transformer and the first output terminal of the sixth transformer are connected to the input terminal of the third on-load switch.
The second output end of the first transformer, the second output end of the second transformer and the output end of the first on-load switch are connected with the input end of the first positive and negative regulating switch, the second output end of the third transformer, the second output end of the fourth transformer and the output end of the second on-load switch are connected with the input end of the second positive and negative regulating switch, and the second output end of the fourth transformer, the second output end of the fifth transformer and the output end of the third on-load switch are connected with the input end of the third positive and negative regulating switch.
In a specific embodiment, the on-load tap-changing controller model further includes: a timed circuit breaker circuit model;
wherein the timed circuit breaker circuit model comprises: a first, a second and a third timing breaker;
the input end of the first timing circuit breaker is connected with a first phase input, and the output end of the first timing circuit breaker is connected with the input end of a first positive and negative regulating switch; the input end of the second timing circuit breaker is connected with a second phase input, and the output end of the second timing circuit breaker is connected with the input end of a second positive and negative regulating switch; the input end of the third timing circuit breaker is connected with a third phase input, and the output end of the third timing circuit breaker is connected with the input end of a third positive and negative regulating switch.
The invention simulates the adjusting process of the on-load tap-changer to meet the transient research requirement of the power system; meanwhile, a loaded voltage regulation controller model is established to realize positive and negative regulation switches existing in an actual transformer model, and meanwhile, positive and negative regulation and loaded regulation of the transformation ratio are realized, so that transient state research of a power system is facilitated.
In a third aspect.
The present invention provides an electronic device, including:
a processor, a memory, and a bus;
the bus is used for connecting the processor and the memory;
the memory is used for storing operation instructions;
the processor is configured to call the operation instruction, and the executable instruction enables the processor to execute an operation corresponding to the electromagnetic transient modeling method for the on-load tap changer as shown in the first aspect of the present application.
In an alternative embodiment, there is provided an electronic device, as shown in fig. 14, an electronic device 5000 shown in fig. 14 including: a processor 5001 and a memory 5003. Wherein the processor 5001 is coupled to the memory 5003, such as via bus 5002. Optionally, the electronic device 5000 may also include a transceiver 5004. It should be noted that the transceiver 5004 is not limited to one in practical application, and the structure of the electronic device 5000 is not limited to the embodiment of the present application.
The processor 5001 may be a CPU, general purpose processor, DSP, ASIC, FPGA or other programmable logic device, transistor logic device, hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor 5001 may also be a combination of processors implementing computing functionality, e.g., a combination comprising one or more microprocessors, a combination of DSPs and microprocessors, or the like.
The memory 5003 may be, but is not limited to, a ROM or other type of static storage device that can store static information and instructions, a RAM or other type of dynamic storage device that can store information and instructions, an EEPROM, a CD-ROM or other optical disk storage, optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
The memory 5003 is used for storing application code that implements aspects of the present application and is controlled in execution by the processor 5001. The processor 5001 is configured to execute application program code stored in the memory 5003 to implement the teachings of any of the foregoing method embodiments.
Among them, electronic devices include but are not limited to: mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and the like, and fixed terminals such as digital TVs, desktop computers, and the like.
A fourth aspect.
The present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method for electromagnetic transient modeling of an on-load tap changer as set forth in the first aspect of the present application.
Yet another embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, which, when run on a computer, enables the computer to perform the corresponding content of the foregoing method embodiments.
Claims (8)
1. An electromagnetic transient modeling method of an on-load voltage regulation controller is characterized by comprising the following steps:
establishing a three-phase transformer circuit model according to a single-phase transformer structure and single-phase transformer parameters, wherein the three-phase transformer circuit model comprises: a first phase input, a second phase input, a third phase input, a first transformation ratio signal, a second transformation ratio signal, a first transformer, a second transformer, a third transformer, a fourth transformer, a fifth transformer and a sixth transformer; the first phase input and the first transformation ratio signal are connected with the input end of the first transformer; the first phase input and the second transformation ratio signal are connected with the input end of the second transformer; the second phase input and the first transformation ratio signal are connected with the input end of the third transformer; the second phase input and the second transformation ratio signal are connected with the input end of the fourth transformer; the third phase input and the first transformation ratio signal are connected with the input end of the fifth transformer; the third phase input and the second transformation ratio signal are connected with the input end of the sixth transformer;
establishing an on-load tap-changer circuit model according to an on-load tap-changer principle, wherein the on-load tap-changer circuit model comprises: the first load switch, the second load switch and the third load switch; the first output end of the first transformer and the first output end of the second transformer are connected with the input end of the first on-load switch, the first output end of the third transformer and the first output end of the fourth transformer are connected with the input end of the second on-load switch, and the first output end of the fifth transformer and the first output end of the sixth transformer are connected with the input end of the third on-load switch;
establish positive and negative regulating switch circuit model according to positive and negative regulating switch principle, positive and negative regulating switch circuit model includes: the first positive and negative regulating switch, the second positive and negative regulating switch and the third positive and negative regulating switch; the output end of the first on-load switch is connected with the input end of the first positive and negative regulating switch, the output end of the second on-load switch is connected with the input end of the second positive and negative regulating switch, and the output end of the third on-load switch is connected with the input end of the third positive and negative regulating switch;
connecting the three-phase transformer circuit model, the positive and negative regulation switch circuit model and the on-load tap-changer circuit model to obtain an on-load voltage regulation controller model;
the output end of the three-phase transformer circuit model is connected with the input end of the on-load tap-changer circuit model, the output end of the on-load tap-changer circuit model is connected with the input end of the positive and negative regulation switch circuit model, and the output end of the positive and negative regulation switch circuit model is the output end of the on-load voltage regulation controller model.
2. The method of claim 1 for electromagnetic transient modeling of an on-load tap changer controller, further comprising:
establishing a timing circuit breaker circuit model according to a timing circuit breaker circuit principle;
and the output end of the timing circuit breaker circuit model is connected with the input end of the positive and negative regulation switch circuit model.
3. The method of claim 1, wherein the on-load tap changer model further comprises: a timed circuit breaker circuit model;
wherein the timed circuit breaker circuit model comprises: a first, a second and a third timing breaker;
the input end of the first timing circuit breaker is connected with a first phase input, and the output end of the first timing circuit breaker is connected with the input end of a first positive and negative regulating switch; the input end of the second timing circuit breaker is connected with a second phase input, and the output end of the second timing circuit breaker is connected with the input end of a second positive and negative regulating switch; the input end of the third timing circuit breaker is connected with a third phase input, and the output end of the third timing circuit breaker is connected with the input end of a third positive and negative regulating switch.
4. The method of claim 1, wherein the first and second transformation ratio signals have a value range of [ -1,1], and wherein the first and second transformation ratio signals are positive and negative when taking positive values.
5. An electromagnetic transient modeling system for an on-load tap changer controller, comprising:
the three-phase transformer circuit model establishing module is used for establishing a three-phase transformer circuit model according to the single-phase transformer structure and the single-phase transformer parameters; the three-phase transformer circuit model comprises: a first phase input, a second phase input, a third phase input, a first transformation ratio signal, a second transformation ratio signal, a first transformer, a second transformer, a third transformer, a fourth transformer, a fifth transformer and a sixth transformer; the first phase input and the first transformation ratio signal are connected with the input end of the first transformer; the first phase input and the second transformation ratio signal are connected with the input end of the second transformer; the second phase input and the first transformation ratio signal are connected with the input end of the third transformer; the second phase input and the second transformation ratio signal are connected with the input end of the fourth transformer; the third phase input and the first transformation ratio signal are connected with the input end of the fifth transformer; the third phase input and the second transformation ratio signal are connected with the input end of the sixth transformer;
the on-load tap-changer circuit model establishing module is used for establishing an on-load tap-changer circuit model according to the on-load tap-changer principle; the on-load tap changer circuit model comprises: the first load switch, the second load switch and the third load switch; the first output end of the first transformer and the first output end of the second transformer are connected with the input end of the first on-load switch, the first output end of the third transformer and the first output end of the fourth transformer are connected with the input end of the second on-load switch, and the first output end of the fifth transformer and the first output end of the sixth transformer are connected with the input end of the third on-load switch;
the positive and negative regulation switch circuit model establishing module is used for establishing a positive and negative regulation switch circuit model according to a positive and negative regulation switch principle; the positive and negative regulation switch circuit model comprises: the first positive and negative regulating switch, the second positive and negative regulating switch and the third positive and negative regulating switch; the output end of the first on-load switch is connected with the input end of the first positive and negative regulating switch, the output end of the second on-load switch is connected with the input end of the second positive and negative regulating switch, and the output end of the third on-load switch is connected with the input end of the third positive and negative regulating switch;
the on-load voltage regulation controller model establishing module is used for connecting the three-phase transformer circuit model, the positive and negative regulation switch circuit model and the on-load tap-changer circuit model to obtain an on-load voltage regulation controller model;
the output end of the three-phase transformer circuit model is connected with the input end of the on-load tap-changer circuit model, the output end of the on-load tap-changer circuit model is connected with the input end of the positive and negative regulation switch circuit model, and the output end of the positive and negative regulation switch circuit model is the output end of the on-load voltage regulation controller model.
6. The on-load tap changer electromagnetic transient modeling system of claim 5, further comprising:
the circuit model establishing module of the timing circuit breaker is used for establishing a circuit model of the timing circuit breaker according to the circuit principle of the timing circuit breaker;
and the output end of the timing circuit breaker circuit model is connected with the input end of the positive and negative regulation switch circuit model.
7. The on-load tap changer electromagnetic transient modeling system of claim 5, wherein the on-load tap changer model further comprises: a timed circuit breaker circuit model;
wherein the timed circuit breaker circuit model comprises: a first, a second and a third timing breaker;
the input end of the first timing circuit breaker is connected with a first phase input, and the output end of the first timing circuit breaker is connected with the input end of a first positive and negative regulating switch; the input end of the second timing circuit breaker is connected with a second phase input, and the output end of the second timing circuit breaker is connected with the input end of a second positive and negative regulating switch; the input end of the third timing circuit breaker is connected with a third phase input, and the output end of the third timing circuit breaker is connected with the input end of a third positive and negative regulating switch.
8. The electromagnetic transient modeling system of an on-load tap changer of claim 5, wherein the first and second transformation ratio signals have values in the range of [ -1,1], and wherein the first and second transformation ratio signals are positive and negative when taking positive values.
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| CN104465053B (en) * | 2014-12-09 | 2016-08-03 | 山东电力设备有限公司 | A kind of high-capacity three-phase combination type phase-shifting transformer |
| CN105826063B (en) * | 2016-05-30 | 2017-08-11 | 东北农业大学 | Three-Phase Distribution Transformers are contactless to be downloaded from dynamic positive-negative voltage-regulation tap changer device |
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