6P pulse wave excitation rectification method and system, electronic equipment and storage medium

Abstract

The invention discloses a 6P pulse wave excitation rectification method and system, electronic equipment and a storage medium, and the method comprises the steps: obtaining different coefficients of the number of six pulse wave paths, adjusting the number of excitation rectifier bridges, and outputting the pulse wave number of an excitation regulator; different connection modes and winding configurations are adopted for the exciting transformer; the number and the arrangement sequence of the power cabinets and the position of the alternating current side wire inlet cabinet are optimally configured, and stable direct current voltage is output. Harmonic waves of the transformer can be reduced, loss of the transformer can be reduced, the problems that the exciting transformer is large in loss and harmonic waves are solved, the same effect is achieved by adopting the small exciting transformer design capacity, meanwhile, exciting voltage ripples can be reduced, and temperature rise of an exciting winding of a generator is reduced to a certain degree.

Description

Technical Field

[0001] The present invention relates to the technical field of power system control, and in particular to a 6P pulse excitation rectification method, system, electronic equipment and storage medium. Background Art

[0002] For generators using self-parallel excitation, the excitation power rectifier of the excitation power supply is powered by an excitation transformer. The high-voltage side of the excitation transformer is usually connected to the generator end bus, and the low-voltage side is connected to the thyristor three-phase fully controlled bridge rectifier. The load of the excitation power rectifier is the generator rotor winding with large inductance and insulation to the ground. The excitation transformer winding current is a non-sinusoidal current, and the design of the transformer needs to consider the influence of harmonic currents in the winding. Since the generator rotor time constant is usually several seconds, the thyristor current of the excitation power rectifier device and the line current on the AC side (i.e., the low-voltage side of the excitation transformer) can be regarded as rectangular waves, with fundamental and harmonic components. Harmonic currents will increase the copper and iron losses of the transformer and distort the voltage waveform at the generator end. When designing a general excitation transformer, due to the influence of harmonics, the actual capacity will choose thermal capacity, which is about 115% to 125% of the calculated capacity, and there are problems of large losses and harmonics in the excitation transformer. Summary of the invention

[0003] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0004] In view of the above existing problems, the present invention is proposed.

[0005] Therefore, the present invention provides a 6P pulse excitation rectification method, system, electronic device and storage medium to solve the problem that traditional scheduling methods have poor adaptability to the uncertainty of new energy.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] In a first aspect, the present invention provides a 6P pulse excitation rectification method, comprising:

[0008] Get different coefficients of the 6-pulse path number, adjust the number of excitation rectifier bridges, and output the number of excitation regulator pulses;

[0009] Based on the number of pulses of the excitation regulator, different connection methods and winding configurations are used for the excitation transformer;

[0010] Based on the number of excitation rectifier bridges and different connection methods, the number, arrangement order and position of the AC side incoming line cabinets are optimized to output a stable DC voltage. As a preferred solution of the 6P pulse excitation rectifier method described in the present invention, wherein:

[0011] The method of adjusting the number of excitation rectifier bridges and outputting the number of excitation regulator pulses according to different coefficients of the number of 6-pulse paths output by the excitation regulator comprises the following steps:

[0012] When the number of 6-pulse paths is the second coefficient and the number of excitation rectifier bridges is the first number, the excitation regulator outputs two 6-pulse paths and the total output is 12 pulses.

[0013] When the number of 6-pulse paths is the second coefficient and the number of excitation rectifier bridges is the second number, the excitation regulator outputs two 6-pulse paths and the total output is 12 pulses;

[0014] When the number of 6-pulse paths is the third coefficient and the number of excitation rectifier bridges is the third number, the excitation regulator outputs three 6-pulse paths and the total output is 18 pulses.

[0015] As a preferred solution of the 6P pulse excitation rectification method described in the present invention, wherein:

[0016] The method of using different connection modes and winding configurations for the excitation transformer includes the following steps:

[0017] When the number of 6-pulse paths is the second coefficient, the excitation transformer adopts a three-winding transformer, the high-voltage side uses a Y-type connection, the first winding on the low-voltage side uses a delta connection, and the second winding uses a Y-type connection. The first winding and the second winding differ by 30° electrical angle;

[0018] When the number of 6-pulse paths is the second coefficient, the excitation transformer adopts a three-winding transformer, the high-voltage side is connected in a triangle, and the low-voltage side is divided into two windings. The first winding adopts a triangle connection and the second winding adopts a Y connection. The first winding and the second winding differ by 30° electrical angle.

[0019] As a preferred solution of the 6P pulse excitation rectification method described in the present invention, wherein:

[0020] The method of using different connection modes and winding configurations for the excitation transformer also includes the following steps:

[0021] When the number of 6-pulse paths is the third coefficient, the excitation transformer adopts a zigzag connection transformer, the high-voltage side adopts a delta connection, and the low-voltage side is divided into three windings, the first winding is a zigzag connection, the second winding is a Y-type connection, and the third winding is a zigzag connection.

[0022] The first winding and the second winding differ by 10° electrical angle;

[0023] The second winding and the third winding have a phase difference of 10° electrical angle;

[0024] The output of the first winding is connected to the AC input terminal of the first power cabinet and the AC input terminal of the second power cabinet through a busbar;

[0025] The output of the second winding is connected to the AC input terminal of the third power cabinet and the AC input terminal of the fourth power cabinet through a busbar;

[0026] The output of the third winding is connected to the AC input end of the fifth power cabinet and the AC input end of the sixth power cabinet through a busbar.

[0027] As a preferred solution of the 6P pulse excitation rectification method described in the present invention, wherein:

[0028] The optimizing configuration of the number, arrangement order and position of the AC side incoming line cabinet of the power cabinets comprises the following steps:

[0029] When the number of excitation rectifier bridges is the first number, the power cabinets are configured as the first cabinet and the second cabinet, the AC side impedances of each power cabinet are the first impedance and the second impedance respectively, and the first impedance is set equal to the second impedance;

[0030] When the number of excitation rectifier bridges is the second number, the configuration of the power cabinets is the third cabinet, the first cabinet, the second cabinet and the fourth cabinet, the AC side impedance of each power cabinet is the first impedance, the second impedance, the third impedance and the fourth impedance respectively, and the first impedance is set to be equal to the second impedance, and the third impedance is equal to the fourth impedance;

[0031] When the number of excitation rectifier bridges is the third number, the power cabinets are configured as the fifth cabinet, the third cabinet, the first cabinet, the second cabinet, the fourth cabinet and the sixth cabinet, and the AC side impedance of each power cabinet is the first impedance, the second impedance, the third impedance, the fourth impedance, the fifth impedance and the sixth impedance, respectively. The first impedance is set to be equal to the second impedance, the third impedance is equal to the fourth impedance, and the fifth impedance is equal to the sixth impedance.

[0032] When the AC side incoming line cabinet is arranged between the first cabinet and the second cabinet, and the number of the excitation rectifier bridges is the first number, the first impedance is set to be equal to the second impedance;

[0033] When the AC side incoming line cabinet is arranged between the first cabinet and the second cabinet, and the number of the excitation rectifier bridges is the second number, the first impedance is set to be equal to the second impedance, and the third impedance is set to be equal to the fourth impedance;

[0034] When the AC side incoming line cabinet is arranged between the first cabinet and the second cabinet and the number of excitation rectifier bridges is the third number, the first impedance is set to be equal to the second impedance, the third impedance is equal to the fourth impedance, and the fifth impedance is equal to the sixth impedance.

[0035] When the line entry mode is cabinet entry, the first impedance is set to be equal to the second impedance, the third impedance is equal to the fourth impedance, and the fifth impedance is equal to the sixth impedance.

[0036] As a preferred solution of the 6P pulse excitation rectification method described in the present invention, wherein:

[0037] The power cabinet includes an excitation rectifier cabinet, which converts AC power into DC power;

[0038] The calculation formula of the output voltage of the excitation rectifier cabinet is expressed as:

[0039]

[0040] Among them, U dc is the DC voltage output by the excitation rectifier cabinet, U2 is the secondary voltage of the excitation transformer, and α is the trigger angle.

[0041] In a second aspect, the present invention provides a 6P pulse excitation rectifier system, comprising:

[0042] The excitation rectifier bridge adjustment module is used to obtain different coefficients of the number of 6 pulse paths, adjust the number of excitation rectifier bridges, and output the number of pulses of the excitation regulator;

[0043] The excitation transformer configuration module is used to adopt different connection modes and winding configurations for the excitation transformer based on the number of pulses of the excitation regulator;

[0044] The power cabinet configuration module is used to optimize the number, arrangement order and position of the AC side incoming cabinet of the power cabinet based on the number of excitation rectifier bridges and different connection methods, and output a stable DC voltage. As a preferred solution of the 6P pulse excitation rectifier system described in the present invention, wherein:

[0045] The first regulating module of the excitation rectifier bridge is used for, when the number of 6-pulse paths is the second coefficient and the number of excitation rectifier bridges is the first number, the excitation regulator outputs two 6-pulse paths and the total output is 12 pulses;

[0046] The second regulating module of the excitation rectifier bridge is used for, when the number of 6-pulse paths is the second coefficient and the number of excitation rectifier bridges is the second number, the excitation regulator outputs two 6-pulse paths and the total output is 12 pulses;

[0047] The third regulating module of the excitation rectifier bridge is used for the excitation regulator to output three 6-pulse waves when the number of 6-pulse paths is the third coefficient and the number of excitation rectifier bridges is the third number, and the total output is 18 pulses.

[0048] As a preferred solution of the 6P pulse excitation rectifier system described in the present invention, wherein:

[0049] The first configuration module of the excitation transformer is used for, when the number of 6-pulse paths is the second coefficient, the excitation transformer adopts a three-winding transformer, the high-voltage side adopts a Y-type connection, the first winding on the low-voltage side adopts a delta connection, the second winding adopts a Y-type connection, and the first winding and the second winding differ by 30° electrical angle;

[0050] The second configuration module of the excitation transformer is used for when the number of 6-pulse paths is the second coefficient, the excitation transformer adopts a three-winding transformer, the high-voltage side adopts a delta connection, and the low-voltage side is divided into two windings, the first winding adopts a delta connection, and the second winding adopts a Y connection, and the first winding and the second winding differ by 30° electrical angle.

[0051] As a preferred solution of the 6P pulse excitation rectifier system described in the present invention, wherein:

[0052] The third configuration module of the excitation transformer is used for when the number of 6-pulse paths is the third coefficient, the excitation transformer adopts a zigzag connection transformer, the high-voltage side adopts a delta connection, the low-voltage side is divided into three windings, the first winding is a zigzag connection, the second winding is a Y-type connection, and the third winding is a zigzag connection.

[0053] A first winding and a second winding phase difference configuration module, used for a phase difference of 10° electrical angle between the first winding and the second winding;

[0054] A second winding and a third winding phase difference configuration module, used for a phase difference of 10° electrical angle between the second winding and the third winding;

[0055] A first winding output connection module, used for connecting the output of the first winding to the AC input terminal of the first power cabinet and the AC input terminal of the second power cabinet through a busbar;

[0056] A second winding output connection module, used for connecting the output of the second winding to the AC input terminal of the third power cabinet and the AC input terminal of the fourth power cabinet through a busbar;

[0057] The third winding output connection module is used to connect the output of the third winding to the AC input end of the fifth power cabinet and the AC input end of the sixth power cabinet through the busbar.

[0058] As a preferred solution of the 6P pulse excitation rectifier system described in the present invention, wherein:

[0059] A first configuration module for a power cabinet, used for configuring the power cabinets as a first cabinet and a second cabinet when the number of excitation rectifier bridges is a first number, the AC side impedance of each power cabinet is a first impedance and a second impedance respectively, and setting the first impedance equal to the second impedance;

[0060] A second configuration module for a power cabinet, used for configuring the power cabinets as a third cabinet, a first cabinet, a second cabinet and a fourth cabinet when the number of excitation rectifier bridges is a second number, the AC side impedances of each power cabinet are respectively the first impedance, the second impedance, the third impedance and the fourth impedance, and setting the first impedance equal to the second impedance and the third impedance equal to the fourth impedance;

[0061] The third configuration module of the power cabinet is used to configure the power cabinets as the fifth cabinet, the third cabinet, the first cabinet, the second cabinet, the fourth cabinet and the sixth cabinet when the number of excitation rectifier bridges is the third number. The AC side impedance of each power cabinet is the first impedance, the second impedance, the third impedance, the fourth impedance, the fifth impedance and the sixth impedance respectively. The first impedance is set to be equal to the second impedance, the third impedance is equal to the fourth impedance, and the fifth impedance is equal to the sixth impedance.

[0062] The two-cabinet incoming line impedance balancing module is used to set the first impedance equal to the second impedance when the AC side incoming line cabinet is arranged between the first cabinet and the second cabinet and the number of excitation rectifier bridges is the first number;

[0063] A four-cabinet incoming line impedance balancing module, used for setting the first impedance equal to the second impedance and the third impedance equal to the fourth impedance when the AC side incoming line cabinet is arranged between the first cabinet and the second cabinet and the number of excitation rectifier bridges is the second number;

[0064] The six-cabinet incoming line impedance balancing module is used to set the first impedance equal to the second impedance, the third impedance equal to the fourth impedance, and the fifth impedance equal to the sixth impedance when the AC side incoming line cabinet is arranged between the first cabinet and the second cabinet and the number of excitation rectifier bridges is the third number.

[0065] The branch cabinet incoming line impedance balancing module is used to set the first impedance equal to the second impedance, the third impedance equal to the fourth impedance, and the fifth impedance equal to the sixth impedance when the incoming line mode is the branch cabinet incoming line.

[0066] As a preferred solution of the 6P pulse excitation rectifier system described in the present invention, wherein:

[0067] The calculation formula of the excitation rectifier cabinet output voltage calculation module for the excitation rectifier cabinet output voltage is expressed as:

[0068]

[0069] Among them, U dc is the DC voltage output by the excitation rectifier cabinet, U2 is the secondary voltage of the excitation transformer, and α is the trigger angle.

[0070] In a third aspect, the present invention provides a computing device, comprising:

[0071] Memory, used to store programs;

[0072] The processor is used to execute the computer executable instructions, and the computer executable instructions, when executed by the processor, implement the steps of the 6P pulse excitation rectification method.

[0073] In a fourth aspect, the present invention provides a computer-readable storage medium, comprising: when the program is executed by a processor, the steps of implementing the 6P pulse excitation rectification method are implemented.

[0074] Beneficial effects of the present invention: The present invention generates an output with a higher pulse number through the coordinated work of multiple excitation rectifier bridges. The excitation transformer adopts a multi-winding connection method, thereby improving the performance of the system, reducing the loss of the transformer, and reducing the harmonics of the transformer, thereby using a smaller excitation transformer design capacity to achieve the same effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0076] Figure 1 A basic flow chart of a 6P pulse excitation rectification method provided by an embodiment of the present invention;

[0077] Figure 2 A 12-pulse excitation rectifier high-voltage side winding of a 6P pulse excitation rectifier method provided by an embodiment of the present invention is a Y-type connection diagram;

[0078] Figure 3 A 6P pulse excitation rectification method provided by one embodiment of the present invention has a 12-pulse excitation rectification high-voltage side winding with a △-type connection diagram;

[0079] Figure 4 A schematic diagram of 18-pulse excitation rectification of a 6P pulse excitation rectification method provided by one embodiment of the present invention;

[0080] Figure 5 An AC side incoming line configuration diagram of a 6P pulse excitation rectification method provided by one embodiment of the present invention;

[0081] Figure 6 A sub-cabinet incoming line configuration diagram of a 6P pulse excitation rectification method provided by one embodiment of the present invention;

[0082] Figure 7 A schematic diagram of an excitation voltage waveform of a 6P pulse excitation rectification method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0083] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0084] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0085] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0086] The present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0087] At the same time, in the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper, lower, inner and outer" are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first, second or third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0088] In the present invention, unless otherwise clearly specified and limited, the terms "install, connect, connect" should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection or an integral connection; it can also be a mechanical connection, an electrical connection or a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0089] Example 1

[0090] Reference Figure 1, is an embodiment of the present invention, and provides a 6P pulse excitation rectification method, such as Figure 1 As shown, the following steps are included:

[0091] S1: Get different coefficients of the number of 6-pulse paths, adjust the number of excitation rectifier bridges, and output the number of pulses of the excitation regulator;

[0092] In an embodiment of the present invention, according to different coefficients of the number of 6-pulse paths output by the excitation regulator, the number of excitation rectifier bridges is adjusted to output the number of pulses of the excitation regulator, including the following steps:

[0093] When the number of 6-pulse paths is the second coefficient and the number of excitation rectifier bridges is the first number, the excitation regulator outputs two 6-pulse paths and the total output is 12 pulses.

[0094] When the number of 6-pulse paths is the second coefficient and the number of excitation rectifier bridges is the second number, the excitation regulator outputs two 6-pulse paths and the total output is 12 pulses;

[0095] When the number of 6-pulse paths is the third coefficient and the number of excitation rectifier bridges is the third number, the excitation regulator outputs three 6-pulse paths and the total output is 18 pulses.

[0096] In the embodiment of the present invention, the different coefficients P of the number of 6 pulse wave paths include a first coefficient P=1, a second coefficient P=2, and a third coefficient P=3; generally, P will not exceed 3.

[0097] In an embodiment of the present invention, the number N of excitation rectifier bridges includes a first number, a second number and a third number; the first number is 2, the second number is 4, and the third number is 6.

[0098] In an embodiment of the present invention, the number N of excitation rectifier bridges can be 2, 4 or 6, indicating the number of excitation rectifier bridges used in the system; when P=2, 2 or 4 excitation rectifier bridges are selected according to the rated excitation current of the generator set. Regardless of whether N is 2 or 4, the excitation regulator will output two 6-pulse waves; when P=3, 6 excitation rectifier bridges must be used to achieve the output of three 6-pulse waves.

[0099] It should be noted that the first coefficient P=1 is a conventional excitation method, that is, the excitation regulator outputs 6 pulses. Specifically, the conventional excitation system usually uses a 6-pulse rectification scheme, which means that the excitation regulator only outputs one 6-pulse signal, and the entire system uses a set of pulse signals to complete the excitation function. This configuration is simple and low-cost, but there are some shortcomings, such as large harmonic currents in the transformer windings, resulting in increased transformer losses, and relatively high ripples in the excitation voltage, which may cause problems such as temperature rise in the generator excitation winding.

[0100] In the embodiment of the present invention, by increasing the output pulse number of the excitation regulator (12 pulses are output when P=2, and 18 pulses are output when P=3) and adopting a special transformer connection method (such as a three-winding transformer or a zigzag connection transformer), the harmonics of the transformer can be effectively reduced, the loss can be reduced, and the excitation voltage ripple can be reduced, thereby improving the overall performance and efficiency of the system.

[0101] S2: Based on the number of pulses of the excitation regulator, different connection modes and winding configurations are adopted for the excitation transformer. In the embodiment of the present invention, different connection modes and winding configurations are adopted, and the following steps are also included:

[0102] When the number of 6-pulse paths is the second coefficient, the excitation transformer adopts a three-winding transformer, the high-voltage side uses a Y-type connection, the first winding on the low-voltage side uses a delta connection, and the second winding uses a Y-type connection. The first winding and the second winding differ by 30° electrical angle;

[0103] When the number of 6-pulse paths is the second coefficient, the excitation transformer adopts a three-winding transformer, the high-voltage side is connected in a triangle, and the low-voltage side is divided into two windings. The first winding adopts a triangle connection and the second winding adopts a Y connection. The first winding and the second winding differ by 30° electrical angle.

[0104] When the number of 6-pulse paths is the third coefficient, the excitation transformer adopts a zigzag connection transformer, the high-voltage side adopts a delta connection, and the low-voltage side is divided into three windings, the first winding is a zigzag connection, the second winding is a Y-type connection, and the third winding is a zigzag connection.

[0105] In an embodiment of the present invention, the output of the first winding is connected to the AC input terminal of the first power cabinet and the AC input terminal of the second power cabinet through a busbar;

[0106] In an embodiment of the present invention, the output of the second winding is connected to the AC input terminal of the third power cabinet and the AC input terminal of the fourth power cabinet through a busbar;

[0107] In an embodiment of the present invention, the output of the third winding is connected to the AC input terminal of the fifth power cabinet and the AC input terminal of the sixth power cabinet through a busbar.

[0108] More specifically, when P=2, the excitation transformer adopts a three-winding transformer, with a Y-type or △-type on the high-voltage side and two windings on the low-voltage side. One winding is △-connected, and the output is connected to the AC side of power cabinets 1 and 2, and the other winding is Y-point connected, and the output is connected to the AC side of power cabinets 3 and 4. The two windings differ by 30° electrical angle.

[0109] More specifically, when P=3, the excitation transformer adopts a zigzag connection transformer, the high-voltage side adopts a △ type, and the three windings on the low-voltage side differ by 10° electrical angle. The first winding is a zigzag connection, and the output is connected to the AC side of power cabinets 1 and 2. The second winding is a Y connection, and the output is connected to the AC side of power cabinets 3 and 4. The third winding is a zigzag connection, and the output is connected to the AC side of power cabinets 5 and 6.

[0110] S3: Based on the number of excitation rectifier bridges and different connection methods, the number, arrangement order and position of the AC side incoming line cabinets are optimized to output a stable DC voltage. In an embodiment of the present invention, the power cabinets are reasonably configured, including the following steps:

[0111] When the number of excitation rectifier bridges is the first number, the power cabinets are configured as the first cabinet and the second cabinet, the AC side impedances of each power cabinet are the first impedance and the second impedance respectively, and the first impedance is set equal to the second impedance;

[0112] When the number of excitation rectifier bridges is the second number, the configuration of the power cabinets is the third cabinet, the first cabinet, the second cabinet and the fourth cabinet, the AC side impedance of each power cabinet is the first impedance, the second impedance, the third impedance and the fourth impedance respectively, and the first impedance is set to be equal to the second impedance, and the third impedance is equal to the fourth impedance;

[0113] When the number of excitation rectifier bridges is the third number, the power cabinets are configured as the fifth cabinet, the third cabinet, the first cabinet, the second cabinet, the fourth cabinet and the sixth cabinet, and the AC side impedance of each power cabinet is the first impedance, the second impedance, the third impedance, the fourth impedance, the fifth impedance and the sixth impedance, respectively. The first impedance is set to be equal to the second impedance, the third impedance is equal to the fourth impedance, and the fifth impedance is equal to the sixth impedance.

[0114] When the AC side incoming line cabinet is arranged between the first cabinet and the second cabinet, and the number of the excitation rectifier bridges is the first number, the first impedance is set to be equal to the second impedance;

[0115] When the AC side incoming line cabinet is arranged between the first cabinet and the second cabinet, and the number of the excitation rectifier bridges is the second number, the first impedance is set to be equal to the second impedance, and the third impedance is set to be equal to the fourth impedance;

[0116] When the AC side incoming line cabinet is arranged between the first cabinet and the second cabinet and the number of excitation rectifier bridges is the third number, the first impedance is set to be equal to the second impedance, the third impedance is equal to the fourth impedance, and the fifth impedance is equal to the sixth impedance.

[0117] When the line entry mode is cabinet entry, the first impedance is set to be equal to the second impedance, the third impedance is equal to the fourth impedance, and the fifth impedance is equal to the sixth impedance.

[0118] More specifically, the power cabinets 1, 2 or 1, 2, 3, 4 or 1, 2, 3, 4, 5, 6, the AC side impedance of each power cabinet is Z1, Z2 or Z1, Z2, Z3, Z4 or more Z1, Z2, Z3, Z4, Z5, Z6.

[0119] More specifically, the power cabinets are arranged as 1-2 or 3-1-2-4 or 5-3-1-2-4-6, and the AC side incoming line cabinet is set between cabinets 1 and 2, then Z1≈Z2 or Z1≈Z2, Z3≈Z4 or Z1≈Z2, Z3≈Z4, Z5≈Z6,

[0120] More specifically, if the line entry method is through a cabinet, then Z1≈Z2 or Z1≈Z2≈Z3≈Z4 or Z1≈Z2≈Z3≈Z4≈Z5≈Z6.

[0121] In an embodiment of the present invention, the power cabinet includes an excitation rectifier cabinet, which converts AC power into DC power;

[0122] In the embodiment of the present invention, the calculation formula of the output voltage of the excitation rectifier cabinet is expressed as:

[0123]

[0124] Among them, U dc is the DC voltage output by the excitation rectifier cabinet, U2 is the secondary voltage of the excitation transformer, and α is the trigger angle.

[0125] This embodiment also provides a 6P pulse excitation rectification system, including:

[0126] The excitation rectifier bridge adjustment module is used to obtain different coefficients of the number of 6 pulse paths, adjust the number of excitation rectifier bridges, and output the number of pulses of the excitation regulator;

[0127] Excitation transformer configuration module, used to adopt different connection methods and winding configurations based on different coefficients of the number of 6-pulse paths;

[0128] The power cabinet configuration module is used to reasonably configure the power cabinet based on the number of excitation rectifier bridges and different connection methods to ensure efficient operation of the system under different coefficients.

[0129] Furthermore, it also includes:

[0130] The first regulating module of the excitation rectifier bridge is used for, when the number of 6-pulse paths is the second coefficient and the number of excitation rectifier bridges is the first number, the excitation regulator outputs two 6-pulse paths and the total output is 12 pulses;

[0131] The second regulating module of the excitation rectifier bridge is used for, when the number of 6-pulse paths is the second coefficient and the number of excitation rectifier bridges is the second number, the excitation regulator outputs two 6-pulse paths and the total output is 12 pulses;

[0132] The third regulating module of the excitation rectifier bridge is used for the excitation regulator to output three 6-pulse waves when the number of 6-pulse paths is the third coefficient and the number of excitation rectifier bridges is the third number, and the total output is 18 pulses.

[0133] Furthermore, it also includes:

[0134] The first configuration module of the excitation transformer is used for, when the number of 6-pulse paths is the second coefficient, the excitation transformer adopts a three-winding transformer, the high-voltage side adopts a Y-type connection, the first winding on the low-voltage side adopts a delta connection, the second winding adopts a Y-type connection, and the first winding and the second winding differ by 30° electrical angle;

[0135] The second configuration module of the excitation transformer is used for when the number of 6-pulse paths is the second coefficient, the excitation transformer adopts a three-winding transformer, the high-voltage side adopts a delta connection, and the low-voltage side is divided into two windings, the first winding adopts a delta connection, and the second winding adopts a Y connection, and the first winding and the second winding differ by 30° electrical angle.

[0136] Furthermore, it also includes:

[0137] The third configuration module of the excitation transformer is used for when the number of 6-pulse paths is the third coefficient, the excitation transformer adopts a zigzag connection transformer, the high-voltage side adopts a delta connection, the low-voltage side is divided into three windings, the first winding is a zigzag connection, the second winding is a Y-type connection, and the third winding is a zigzag connection.

[0138] A first winding and a second winding phase difference configuration module, used for a phase difference of 10° electrical angle between the first winding and the second winding;

[0139] A second winding and a third winding phase difference configuration module, used for a phase difference of 10° electrical angle between the second winding and the third winding;

[0140] A first winding output connection module, used for connecting the output of the first winding to the AC input terminal of the first power cabinet and the AC input terminal of the second power cabinet through a busbar;

[0141] A second winding output connection module, used for connecting the output of the second winding to the AC input terminal of the third power cabinet and the AC input terminal of the fourth power cabinet through a busbar;

[0142] The third winding output connection module is used to connect the output of the third winding to the AC input end of the fifth power cabinet and the AC input end of the sixth power cabinet through the busbar.

[0143] Furthermore, it also includes:

[0144] A first configuration module for a power cabinet, used for configuring the power cabinets as a first cabinet and a second cabinet when the number of excitation rectifier bridges is a first number, the AC side impedance of each power cabinet is a first impedance and a second impedance respectively, and setting the first impedance equal to the second impedance;

[0145] A second configuration module for a power cabinet, used for configuring the power cabinets as a third cabinet, a first cabinet, a second cabinet and a fourth cabinet when the number of excitation rectifier bridges is a second number, the AC side impedances of each power cabinet are respectively the first impedance, the second impedance, the third impedance and the fourth impedance, and setting the first impedance equal to the second impedance and the third impedance equal to the fourth impedance;

[0146] The third configuration module of the power cabinet is used to configure the power cabinets as the fifth cabinet, the third cabinet, the first cabinet, the second cabinet, the fourth cabinet and the sixth cabinet when the number of excitation rectifier bridges is the third number. The AC side impedance of each power cabinet is the first impedance, the second impedance, the third impedance, the fourth impedance, the fifth impedance and the sixth impedance respectively. The first impedance is set to be equal to the second impedance, the third impedance is equal to the fourth impedance, and the fifth impedance is equal to the sixth impedance.

[0147] The two-cabinet incoming line impedance balancing module is used to set the first impedance equal to the second impedance when the AC side incoming line cabinet is arranged between the first cabinet and the second cabinet and the number of excitation rectifier bridges is the first number;

[0148] A four-cabinet incoming line impedance balancing module, used for setting the first impedance equal to the second impedance and the third impedance equal to the fourth impedance when the AC side incoming line cabinet is arranged between the first cabinet and the second cabinet and the number of excitation rectifier bridges is the second number;

[0149] The six-cabinet incoming line impedance balancing module is used to set the first impedance equal to the second impedance, the third impedance equal to the fourth impedance, and the fifth impedance equal to the sixth impedance when the AC side incoming line cabinet is arranged between the first cabinet and the second cabinet and the number of excitation rectifier bridges is the third number.

[0150] The branch cabinet incoming line impedance balancing module is used to set the first impedance equal to the second impedance, the third impedance equal to the fourth impedance, and the fifth impedance equal to the sixth impedance when the incoming line mode is the branch cabinet incoming line.

[0151] Furthermore, it also includes:

[0152] The calculation formula of the excitation rectifier cabinet output voltage calculation module for the excitation rectifier cabinet output voltage is expressed as:

[0153]

[0154] Among them, U dc is the DC voltage output by the excitation rectifier cabinet, U2 is the secondary voltage of the excitation transformer, and α is the trigger angle.

[0155] Furthermore, it also includes:

[0156] Memory, used to store programs;

[0157] A processor is used to load the program to execute the 6P pulse excitation rectification method.

[0158] This embodiment also provides a computer-readable storage medium storing a program, and when the program is executed by a processor, the 6P pulse excitation rectification method is implemented.

[0159] The storage medium proposed in this embodiment and the 6P pulse excitation rectification method proposed in the above embodiment belong to the same inventive concept. The technical details not fully described in this embodiment can be referred to the above embodiment, and this embodiment has the same beneficial effects as the above embodiment.

[0160] Through the above description of the implementation methods, the technicians in the relevant field can clearly understand that the present invention can be implemented by means of software and necessary general hardware, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ReadOnly, Memory, ROM), random access memory (RandomAccess Memory, RAM), flash memory (FLASH), hard disk or optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform the methods of various embodiments of the present invention.

[0161] Example 2

[0162] Reference Figure 2-6 , which is an embodiment of the present invention, provides a 6P pulse excitation rectifier system, including an excitation rectifier bridge adjustment module, an excitation transformer configuration module and a power cabinet configuration module.

[0163] In an embodiment of the present invention, the excitation rectifier bridge adjustment module includes obtaining different coefficients of the number of 6 pulse paths, adjusting the number of excitation rectifier bridges, and outputting the number of pulses of the excitation regulator;

[0164] In an embodiment of the present invention, the pulse number of the output excitation regulator includes a 12-pulse excitation rectification system and an 18-pulse excitation rectification system.

[0165] In an embodiment of the present invention, the 12-pulse excitation rectification system includes when P=2, N=2 or 4, and the excitation regulator outputs two 6-pulse paths.

[0166] In an embodiment of the present invention, the 18-pulse excitation rectification system includes when P=3, N=6, and the excitation regulator outputs three 6-pulse waves.

[0167] In an embodiment of the present invention, the excitation transformer configuration module includes different connection modes and winding configurations based on different coefficients of the number of 6-pulse paths;

[0168] In an embodiment of the present invention, different coefficients based on the number of 6 pulse paths include P=2 and P=3.

[0169] In the embodiment of the present invention, when P=2, the excitation transformer adopts a three-winding transformer, and the high-voltage side adopts a Y-type transformer, such as Figure 2 As shown, it includes two windings on the low-voltage side, winding 1 is connected in △, winding 2 is connected in Y, and the two windings differ by 30° electrical angle. The AC side of power cabinet 1 and power cabinet 2 is connected to winding 1, and the AC side of power cabinet 3 and power cabinet 4 is connected to winding 2. The outputs of power cabinet 1, power cabinet 2, power cabinet 3 and power cabinet 4 are connected to the generator rotor.

[0170] In the embodiment of the present invention, when P=2, the excitation transformer also includes a three-winding transformer, and the high-voltage side adopts a △-type connection, such as Figure 3 As shown, it includes two windings on the low-voltage side, winding 1 is connected in △, winding 2 is connected in Y, and the two windings differ by 30° electrical angle. The AC side of power cabinet 1 and power cabinet 2 is connected to winding 1, and the AC side of power cabinet 3 and power cabinet 4 is connected to winding 2. The outputs of power cabinet 1, power cabinet 2, power cabinet 3 and power cabinet 4 are connected to the generator rotor.

[0171] In the embodiment of the present invention, when P=3, Figure 4 As shown, the excitation transformer adopts a zigzag connection transformer, the high-voltage side adopts a △ type, and the low-voltage side has three windings, winding No. 1 is zigzag connected, winding No. 2 is Y-connected, and winding No. 3 is zigzag connected. The three windings differ by 10° electrical angle. The AC side of power cabinets 1 and 2 is connected to transformer winding No. 1, the AC side of power cabinets 3 and 4 is connected to transformer winding No. 2, and the AC side of power cabinets 5 and 6 is connected to transformer winding No. 3. The outputs of power cabinets 1, 2, 3, 4, 5, and 6 are connected to the generator rotor.

[0172] In an embodiment of the present invention, the power cabinet configuration module includes reasonably configuring the power cabinet based on the number of excitation rectifier bridges and different connection modes to ensure efficient operation of the system under different coefficients.

[0173] In an embodiment of the present invention, based on the number of excitation rectifier bridges and different connection methods, the power cabinet is reasonably configured, including when P=2, N can be 2 or 4, the system can be configured with 2 or 4 power cabinets, and when P=3, N must be 6, and the system needs to be configured with 6 power cabinets.

[0174] In an embodiment of the present invention, when P=2, N can be 2 or 4, and the system can be configured with 2 or 4 power cabinets. If N=2, the AC sides of power cabinets 1 and 2 are connected to the two windings respectively; if N=4, power cabinets 1 and 2 are connected to the first winding, and power cabinets 3 and 4 are connected to the second winding.

[0175] In the embodiment of the present invention, when P=3, N must be 6, and the system needs to be configured with 6 power cabinets including an excitation transformer using a zigzag connection transformer, a △-type connection on the high-voltage side, and three windings on the low-voltage side, with a phase difference of 10° between each winding. These three windings are connected to the AC side of power cabinets 1-6 in different ways (such as zigzag connection, Y connection, etc.), ensuring that each power cabinet can obtain an AC power supply with a phase difference of 10°.

[0176] In the embodiment of the present invention, when N=6, Figure 5 As shown, it includes power cabinets 1, 2, 3, 4, 5, and 6. The AC side impedance of each power cabinet is Z1, Z2, Z3, Z4, Z5, and Z6 respectively. The layout of the power cabinets is 5-3-1-2-4-6, and the AC side incoming line cabinet is set between cabinets 1 and 2, so Z1≈Z2, Z3≈Z4, and Z5≈Z6.

[0177] In the embodiment of the present invention, when N=6, Figure 6 As shown, it also includes power cabinets 1, 2, 3, 4, 5, and 6. The AC side impedance of each power cabinet is Z1, Z2, Z3, Z4, Z5, and Z6 respectively. The layout of the power cabinets is 5-3-1-2-4-6, and the incoming line mode is divided into cabinets, then Z1≈Z2≈Z3≈Z4≈Z5≈Z6.

[0178] In an embodiment of the present invention, Figure 7 As shown, the 12-pulse excitation rectification system includes an output ripple of the excitation voltage that changes from 6 wave heads per cycle of conventional excitation to 12 wave heads; the 18-pulse excitation rectification system includes an output ripple of the excitation voltage that changes from 6 wave heads per cycle of conventional excitation to 18 wave heads, thereby improving the ripple of the excitation voltage and further reducing the heating of the generator rotor winding.

[0179] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A 6P pulse excitation rectification method, characterized in that: include: Get different coefficients of the 6-pulse path number, adjust the number of excitation rectifier bridges, and output the number of excitation regulator pulses; Based on the number of pulses of the excitation regulator, different connection methods and winding configurations are used for the excitation transformer; Based on the number of excitation rectifier bridges and different connection methods, the number, arrangement order and position of the AC side incoming line cabinets are optimized to output a stable DC voltage.

2. The 6P pulse excitation rectification method according to claim 1, characterized in that: The method of adjusting the number of excitation rectifier bridges and outputting the number of excitation regulator pulses according to different coefficients of the number of 6-pulse paths output by the excitation regulator comprises the following steps: When the number of 6-pulse paths is the second coefficient and the number of excitation rectifier bridges is the first number, the excitation regulator outputs two 6-pulse paths and the total output is 12 pulses. When the number of 6-pulse paths is the second coefficient and the number of excitation rectifier bridges is the second number, the excitation regulator outputs two 6-pulse paths and the total output is 12 pulses; When the number of 6-pulse paths is the third coefficient and the number of excitation rectifier bridges is the third number, the excitation regulator outputs three 6-pulse paths and the total output is 18 pulses.

3. The 6P pulse excitation rectification method according to claim 1 or 2, characterized in that: The method of using different connection modes and winding configurations for the excitation transformer includes the following steps: When the number of 6-pulse paths is the second coefficient, the excitation transformer adopts a three-winding transformer, the high-voltage side adopts a Y-type connection, the first winding on the low-voltage side adopts a delta connection, and the second winding adopts a Y-type connection. The first winding and the second winding differ by 30° electrical angle; When the number of 6-pulse paths is the second coefficient, the excitation transformer adopts a three-winding transformer, the high-voltage side adopts a delta connection, and the low-voltage side is divided into two windings. The first winding adopts a delta connection and the second winding adopts a Y connection. The first winding and the second winding differ by 30° electrical angle.

4. The 6P pulse excitation rectification method according to claim 3, characterized in that: The method of using different connection modes and winding configurations for the excitation transformer also includes the following steps: When the number of 6-pulse paths is the third coefficient, the excitation transformer adopts a zigzag connection transformer, the high-voltage side adopts a delta connection, and the low-voltage side is divided into three windings, the first winding is a zigzag connection, the second winding is a Y-type connection, and the third winding is a zigzag connection. The first winding and the second winding differ by 10° electrical angle; The second winding and the third winding have a phase difference of 10° electrical angle; The output of the first winding is connected to the AC input terminal of the first power cabinet and the AC input terminal of the second power cabinet through a busbar; The output of the second winding is connected to the AC input terminal of the third power cabinet and the AC input terminal of the fourth power cabinet through a busbar; The output of the third winding is connected to the AC input end of the fifth power cabinet and the AC input end of the sixth power cabinet through a busbar.

5. The 6P pulse excitation rectification method according to claim 4, characterized in that: The optimizing configuration of the number, arrangement order and position of the AC side incoming line cabinet of the power cabinets comprises the following steps: When the number of excitation rectifier bridges is the first number, the power cabinets are configured as the first cabinet and the second cabinet, the AC side impedances of each power cabinet are the first impedance and the second impedance respectively, and the first impedance is set equal to the second impedance; When the number of excitation rectifier bridges is the second number, the configuration of the power cabinets is the third cabinet, the first cabinet, the second cabinet and the fourth cabinet, the AC side impedance of each power cabinet is the first impedance, the second impedance, the third impedance and the fourth impedance respectively, and the first impedance is set to be equal to the second impedance, and the third impedance is equal to the fourth impedance; When the number of excitation rectifier bridges is the third number, the configuration of the power cabinets is the fifth cabinet, the third cabinet, the first cabinet, the second cabinet, the fourth cabinet and the sixth cabinet, and the AC side impedance of each power cabinet is the first impedance, the second impedance, the third impedance, the fourth impedance, the fifth impedance and the sixth impedance respectively, and the first impedance is set to be equal to the second impedance, the third impedance is equal to the fourth impedance, and the fifth impedance is equal to the sixth impedance; When the AC side incoming line cabinet is arranged between the first cabinet and the second cabinet, and the number of the excitation rectifier bridges is the first number, the first impedance is set to be equal to the second impedance; When the AC side incoming line cabinet is arranged between the first cabinet and the second cabinet, and the number of the excitation rectifier bridges is the second number, the first impedance is set to be equal to the second impedance, and the third impedance is equal to the fourth impedance; When the AC side incoming line cabinet is arranged between the first cabinet and the second cabinet, and the number of the excitation rectifier bridges is the third number, the first impedance is set to be equal to the second impedance, the third impedance is equal to the fourth impedance, and the fifth impedance is equal to the sixth impedance; When the line entry mode is cabinet entry, the first impedance is set to be equal to the second impedance, the third impedance is equal to the fourth impedance, and the fifth impedance is equal to the sixth impedance.

6. The 6P pulse excitation rectification method according to claim 5, characterized in that: The power cabinet includes an excitation rectifier cabinet, which converts alternating current into direct current; The calculation formula of the output voltage of the excitation rectifier cabinet is expressed as: Among them, U dc is the DC voltage output by the excitation rectifier cabinet, U2 is the secondary voltage of the excitation transformer, and α is the trigger angle.

7. A system for implementing a 6P pulse excitation rectification method, characterized in that: The excitation rectifier bridge adjustment module is used to obtain different coefficients of the number of 6 pulse paths, adjust the number of excitation rectifier bridges, and output the number of pulses of the excitation regulator; The excitation transformer configuration module is used to adopt different connection modes and winding configurations for the excitation transformer based on the number of pulses of the excitation regulator; The power cabinet configuration module is used to optimize the number, arrangement order and position of the AC side incoming cabinet of the power cabinets based on the number of excitation rectifier bridges and different connection methods, and output a stable DC voltage.

8. The 6P pulse excitation rectifier system according to claim 7, characterized in that: The first regulating module of the excitation rectifier bridge is used for, when the number of 6-pulse paths is the second coefficient and the number of excitation rectifier bridges is the first number, the excitation regulator outputs two 6-pulse paths and the total output is 12 pulses; The second regulating module of the excitation rectifier bridge is used for, when the number of 6-pulse paths is the second coefficient and the number of excitation rectifier bridges is the second number, the excitation regulator outputs two 6-pulse paths and the total output is 12 pulses; The third regulating module of the excitation rectifier bridge is used for the excitation regulator to output three 6-pulse waves when the number of 6-pulse paths is the third coefficient and the number of excitation rectifier bridges is the third number, and the total output is 18 pulses.

9. An electronic device, characterized in that: include: Memory, used to store programs; A processor, used for loading the program to execute the steps of the 6P pulse excitation rectification method as described in any one of claims 1 to 7.

10. A computer-readable storage medium storing a program, characterized in that: When the program is executed by a processor, the steps of the 6P pulse excitation rectification method according to any one of claims 1 to 7 are implemented.

Images