A wind turbine generator unit power collection line intelligent control method and system

Abstract

This invention discloses an intelligent control method and system for the collector circuit of a wind turbine generator set, relating to the field of power generation technology. It primarily addresses the problem that replacing the corresponding transformer of a generator set requires simultaneous replacement of the collector circuit, resulting in high electricity costs. The method mainly includes: acquiring the transformer level of the transformer corresponding to the generator set through a control server, whereby the transformer level represents the voltage level after power transformation; after the control server determines the target relay corresponding to the transformer level based on the transformer-line mapping relationship, it acquires the connection status of all relays in the line relay group and determines the target connection status of the target relay based on the relay connection status; if the target connection status does not match the connection status of the target line corresponding to the transformer level, a state switching command is sent to the target relay to switch the relay on and off. This method is used to control the collector circuit.

Description

Technical Field

[0001] This invention relates to the field of power generation technology, and in particular to an intelligent control method and system for the collector lines of a wind turbine generator set. Background Technology

[0002] In wind power generation systems, the AC transmission lines that transform the electricity generated by the generator sets and transmit it to the generating bus are called collector lines, enabling grid connection. Because generator sets cover a large area, the cost of collector lines is also significant. Therefore, current grid layouts typically use lines with fixed voltage levels. However, directly selecting lines based on voltage levels only applies to circuit transmission at that specific voltage. When the transformer corresponding to the generator set is replaced, the collector lines also need to be replaced, significantly increasing the power cost of the power generation system and greatly impacting the power generation efficiency. Summary of the Invention

[0003] In view of this, the present invention provides an intelligent control method and device for the collector circuit of a wind turbine generator set. The main purpose is to solve the problem that when the corresponding transformer of the generator set is replaced, the collector circuit needs to be replaced at the same time, resulting in a large power cost.

[0004] According to one aspect of the present invention, a method for intelligent control of the collector line of a wind turbine generator set is provided, comprising:

[0005] The voltage level of the transformer corresponding to the generator set is collected by the control server. The voltage level is used to characterize the voltage level after the power is transformed.

[0006] After the control server determines the target relay corresponding to the transformer level based on the transformer line mapping relationship, it collects the connection status of all relays in the line relay group and determines the target connection status of the target relay based on the relay connection status.

[0007] If the target access status does not match the access status of the target line corresponding to the transformer level, a status switching command is sent to the target relay to make the relay switch between opening and closing.

[0008] The line relay group includes at least two relays, each of which is connected to a line in the circuit shunt device, and the circuit shunt device is a line shunt device with at least three terminals.

[0009] Furthermore, the relay access status includes relay on state and relay off state. After acquiring the access status of all relays in the line relay group and determining the target access status of the target relay based on the relay access status, the method further includes:

[0010] If the target relay is in an open circuit state, the usage status of the primary and secondary power transmission equipment associated with the transformer is determined by the control server.

[0011] After the usage state is verified by the voltage level, it is determined whether the target access state matches the access state of the target line.

[0012] The primary power transmission equipment is used to characterize equipment that has a direct connection with the lines in the circuit shunt equipment, and the secondary power transmission equipment is used to characterize equipment that has an indirect connection with the lines in the circuit shunt equipment.

[0013] Furthermore, sending the state switching command to the target relay includes:

[0014] The control server sends a transmission blocking command to the generator set, and the transmission blocking command carries the blocking duration.

[0015] When the control server receives the transmission feedback signal from the generator set based on the transmission blocking command, it sends a state switching command to the target relay.

[0016] Furthermore, before sending a transmission blocking command to the generator set through the control server, the method further includes:

[0017] The control server obtains the transmission duration between the generator set and the circuit shunt device, and generates the blocking duration based on the safe switching duration and the transmission duration.

[0018] The safe switching time is obtained by predicting different transformer levels based on the line switching prediction model. The line switching prediction model is constructed based on the minimum support vector machine, and the kernel function of the line switching prediction model is determined by solving the whale algorithm.

[0019] Furthermore, after sending the state switching command to the target relay, the method further includes:

[0020] The control server monitors the expected access status of each line connected in the line relay group.

[0021] If at least two of the relays are expected to be in the path access state, then a dual-path alarm message is generated through the control server.

[0022] If the dual-path alarm information is verified by the control server's line, then the switching operation of the relay is initiated.

[0023] According to another aspect of the present invention, an intelligent control system for the collector lines of a wind turbine generator set is provided, comprising:

[0024] Control server, generator set, transformer, line relay group, circuit shunt equipment,

[0025] The control server collects the transformer level of the transformer corresponding to the generator set, which is used to characterize the voltage level after the power is transformed. After the control server determines the target relay corresponding to the transformer level based on the transformer line mapping relationship, it collects the connection status of all relays in the line relay group and determines the target connection status of the target relay according to the connection status of the relays. If the target connection status does not match the connection status of the target line corresponding to the transformer level, a status switching command is sent to the target relay to make the relay switch between opening and closing.

[0026] The line relay group includes at least two relays, each of which is connected to a line in the circuit shunt device, and the circuit shunt device is a line shunt device with at least three terminals.

[0027] Furthermore, the relay connection state includes the relay closed state and the relay open state.

[0028] The control server is also used to determine the usage status of the primary power transmission equipment and secondary power transmission equipment associated with the transformer if the access status of the target relay is in the open circuit state; and after the usage status is verified by the voltage level, to determine whether the target access status matches the access status of the target line.

[0029] The primary power transmission equipment is used to characterize equipment that has a direct connection with the lines in the circuit shunt equipment, and the secondary power transmission equipment is used to characterize equipment that has an indirect connection with the lines in the circuit shunt equipment.

[0030] Furthermore, the control server is specifically used to send a transmission blocking command to the generator set, the transmission blocking command carrying a blocking duration; when the control server receives a transmission feedback signal from the generator set based on the transmission blocking command, it sends a state switching command to the target relay.

[0031] Furthermore, the control server is specifically used to obtain the transmission duration between the generator set and the circuit shunt device, and generate the blocking duration based on the safe switching duration and the transmission duration; wherein, the safe switching duration is obtained by predicting different transformer levels based on a line switching prediction model, and the line switching prediction model is constructed based on a minimum support vector machine, and the kernel function of the line switching prediction model is determined by solving the whale algorithm;

[0032] The control server is further configured to monitor the expected access status of each line in the line relay group; if at least two of the relays are expected to be in a path access status, a dual-path alarm message is generated by the control server; if the dual-path alarm message is verified by the line of the control server, the opening and closing switching operation of the relay is initiated.

[0033] Furthermore, the circuit shunt device includes a line input terminal and at least two line output terminals, wherein the transformer level of the line input terminal is higher than the transformer level of the line output terminals.

[0034] By employing the above-described technical solutions, the technical solutions provided by the embodiments of the present invention have at least the following advantages:

[0035] This invention provides an intelligent control method and system for the power collection lines of a wind turbine generator set. The method involves a control server acquiring the transformer level corresponding to the generator set, where the transformer level characterizes the voltage level after power transformation. Once the control server determines the target relay corresponding to the transformer level based on the transformer-line mapping relationship, it acquires the connection status of all relays in the line relay group and determines the target connection status of the target relay based on the relay connection status. If the target connection status does not match the connection status of the target line corresponding to the transformer level, a status switching command is sent to the target relay to switch the relay on and off. The line relay group includes at least two relays, each connected to a line in a circuit shunt device. The circuit shunt device is a line shunt device with at least three terminals, avoiding the need to modify the corresponding lines when the transformer is replaced or its transformer parameters are changed. This significantly reduces the manpower and time costs of line modification, improves the flexibility of line switching, and ensures accurate matching between lines with different voltage carrying capacities and transformer levels, thereby effectively improving the efficiency of power transmission in the power system.

[0036] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0037] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0038] Figure 1 This invention provides a flowchart of an intelligent control method for the collector lines of a wind turbine generator set.

[0039] Figure 2 This diagram illustrates a connection structure of a control system provided by an embodiment of the present invention.

[0040] Figure 3 This diagram illustrates a structural schematic of a line shunt device according to an embodiment of the present invention.

[0041] Figure 4 This diagram illustrates the connection relationship between a line relay group and a line according to an embodiment of the present invention.

[0042] Figure 5 This invention provides a flowchart of another intelligent control method for wind turbine generator collection lines.

[0043] Figure 6 This diagram illustrates a block diagram of an intelligent control system for a wind turbine generator's power collection line, provided by an embodiment of the present invention. Detailed Implementation

[0044] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0045] To address the issue that existing grid deployment methods typically use lines with fixed voltage levels, which only apply to circuits operating at that specific voltage, this approach necessitates replacing the collector lines when the transformer corresponding to the generator set is replaced. This significantly increases the power cost of the power generation system and negatively impacts power generation efficiency. This invention provides an intelligent control method for the collector lines of wind turbine generator sets. Figure 1 As shown, the method includes:

[0046] 101. Collect the transformer level of the transformer corresponding to the generator set through the control server.

[0047] In this embodiment of the invention, the power collection line where the generator set and transformer are located is a line that includes a circuit shunt device, and the circuit shunt device is a line shunt device with at least three terminals. For example... Figure 2 The diagram illustrates a control system connection structure. The generator set is connected to the input terminal of a transformer, and the transformer's output terminal is connected to the input terminal of a line shunt device. Each output terminal is connected to a specific line via a relay in a line relay group. During power grid construction, at least two lines are connected to the same transformer. In practical use, the connection status of the relays connected to each line can be controlled by a control server to switch line usage. The control server can be the controller of the circuit shunt device or a back-end server of the power system; this embodiment does not impose specific limitations. The electrical energy generated by the generator set needs to be transformed by a corresponding transformer to ensure that the transformed voltage meets the requirements of different energy storage or grid transmission, thereby achieving energy storage, energy transmission, and grid connection. The generator set can be a distributed generator set, such as a wind turbine generator set, a photovoltaic generator set, or a combined heat and power generator set, or a generator set in a traditional power system, such as a hydroelectric generator set or a thermal power generator set; this embodiment does not impose specific limitations. The transformer level is used to characterize the voltage level after the electrical energy is transformed. Changes in voltage levels can be due to transformer replacement or adjustments to transformer operating parameters. That is, a single transformer may correspond to different voltage levels, and this embodiment of the invention does not impose specific limitations. For example, if 110kV is designated as Level 1, 220kV as Level 2, and 330kV as Level 3, and the electricity generated by the generator set is transformed to 220kV after a replacement transformer, then the transformer's voltage level is Level 2. However, after adjusting the operating parameters, the voltage after transformation is 110kV, and the transformer's voltage level is Level 1. Voltage levels are used to distinguish the output voltage after transformer transformation, facilitating the selection of subsequent circuit lines. The setting of the voltage level can be customized according to specific application requirements, and this embodiment of the invention does not impose specific limitations.

[0048] It should be noted that the circuit shunt device includes an input terminal connected to the transformer end, and at least two output terminals connected to lines with different voltage carrying capacities. For example... Figure 3 The diagram shows a schematic of a line shunt device, including one input terminal and three output terminals. The transformer level at the input terminal is higher than that at the output terminals, meaning the voltage carrying capacity of the line at the input terminal is higher than that of the line at the output terminals.

[0049] 102. After the control server determines the target relay corresponding to the transformer level based on the transformer line mapping relationship, it collects the connection status of all relays in the line relay group and determines the target connection status of the target relay based on the relay connection status.

[0050] In this embodiment of the invention, the line relay group includes at least two relays, and each relay is connected to a line in the circuit shunt device, such as... Figure 4 The diagram illustrates the connection relationship between a line relay group and a line. The transformer-line mapping relationship includes the correspondence between different transformer levels and individual lines. Each line corresponds to a different transformer level, meaning each line can carry a different voltage. Therefore, by determining the voltage level after the current transformer has transformed the voltage, the line capable of carrying the current voltage can be identified, and thus the corresponding relay, the target relay, can be determined. The number of target relays is not limited to one. To achieve reasonable line allocation, after determining the target relay, it is also necessary to collect the current line connection status, i.e., the open / closed status of the relays corresponding to each line, to determine the expected state that the target relay needs to achieve, i.e., the target connection state, based on the open / closed status of each relay. The relays can be solid-state relays or electromagnetic relays; this embodiment of the invention does not specifically limit the types.

[0051] In this embodiment of the invention, the process of determining the target access state of a target relay based on its access state includes many scenarios. For example, if there is only one target relay matching the current transformer level, by acquiring the access states of all relays, it is determined that the target relay is in an open state, while other relays are in a closed state. Therefore, the target access state should be closed, and the access states of other relays should also be controlled to be open. As another example, if there are two target relays matching the current transformer level, by acquiring the access states of all relays, it is determined that target relay 1 is in an open state, target relay 2 is in a closed state, and other relays are in an open state. If both circuits need to transmit simultaneously, the target access states are target relay 1 closed and target relay 2 closed. If only one circuit needs to transmit, target relay 1 or target relay 2 can be selected as closed according to a pre-configured line selection strategy. The line selection strategy can be a line priority strategy, that is, configuring line priorities based on the line's voltage carrying capacity and selecting the target relay corresponding to the line with the higher priority. For example, lines with a higher voltage carrying capacity have a higher priority, and lines with a lower voltage carrying capacity have a lower priority; conversely, the opposite is also possible. The line selection strategy can also be a minimum adjustment strategy, that is, selecting the method that requires the least amount of relay adjustment to determine the access state, i.e., selecting the target relay 2 that is currently closed, thus eliminating the need to adjust the relay state. The line selection strategy and its specific configuration can be customized according to application requirements, and this embodiment of the invention does not impose specific limitations.

[0052] 103. If the target access status does not match the access status of the target line corresponding to the transformer level, a status switching command is sent to the target relay to make the relay switch between opening and closing.

[0053] In this embodiment of the invention, after determining the target access state of the target relay, the target access state is matched with the access state of the target line corresponding to the target relay to determine whether the open / closed state of the target relay needs to be switched. For example, a line relay group includes three relays A, B, and C, and circuit shunt devices have lines 1#, 2#, and 3#. Relay A is connected to line 1#, relay B is connected to line 2#, and relay C is connected to line 3#. If the target access state is that relay A is closed and line 1# is not connected, then a state switching command needs to be sent to the target relay to instruct relay A to switch from the open state to the closed state. If the target relay includes relays A and C, and the target access state is that relay A is closed and lines 1# and 3# are both connected, then a state switching command needs to be sent to the target relay to instruct relay C to switch from the closed state to the open state. The access state of the target line is determined based on the access state of the corresponding relay. For example, if the access state of the corresponding relay is closed, then the access state of the corresponding line is connected. If, among all relays in the connected state, there are other relays besides the target relay that are in the closed state, then in addition to sending a state switching command to the target relay, it is also necessary to send a state switching command to the other relays that are in the closed state to indicate that they are open, thereby realizing the line switching. For example, if the voltage before the transformer level change was 110KV, and the voltage corresponding to the currently collected transformer level is 330KV, then the state of the relays that can carry 110KV lines needs to be changed from closed to open, and the state of the relays that can carry 30KV lines needs to be changed from open to closed.

[0054] It should be noted that by determining the corresponding line based on the current transformer voltage level and controlling the relays used to control the line, the line with the corresponding voltage carrying capacity can be switched according to different transformer voltage levels. This allows the line to switch flexibly with changes in transformer voltage, avoiding the need to modify the line due to voltage changes. This greatly reduces the manpower and equipment costs of power system upgrades and also significantly reduces voltage switching time, thereby ensuring the power generation efficiency.

[0055] In one embodiment of the present invention, for further illustration and limitation, such as Figure 5 As shown, after collecting the connection status of all relays in the line relay group and determining the target connection status of the target relay based on the connection status, the method further includes:

[0056] 201. If the target relay is in an open circuit state, the usage status of the primary and secondary power transmission equipment associated with the transformer is determined by the control server.

[0057] 202. After the voltage level verification is passed in the usage state, determine whether the target access state matches the access state of the target line.

[0058] In this embodiment of the invention, the power equipment includes primary power transmission equipment and secondary power transmission equipment. Primary power transmission equipment represents equipment directly connected to the lines in the circuit shunt equipment, such as circuit breakers, transformers, contactors, fuses, current-limiting reactors, and surge arresters. Secondary power transmission equipment represents equipment indirectly connected to the lines in the circuit shunt equipment, such as various measuring instruments and relay protection devices. The relay connection status includes relay closed state and relay open state. If the target relay's connection status is open, it indicates that the target line corresponding to the target relay is not connected, and there is a high probability that the target relay's connection status will need to be switched to closed state, i.e., power transmission at the current voltage level will be carried out through the corresponding target line. To ensure that the equipment in this target line is not affected by the circuit switching, the usage status of the power equipment in the target line needs to be retrieved by the control server, i.e., whether the power equipment is currently connected to the line, and the voltage level of the power equipment in use needs to be verified. The voltage level verification can be based on the attribute parameters of the power equipment stored in the system or on feedback from power maintenance personnel. Attribute parameter verification, for example, if the maximum operating voltage of power equipment A is 35KV, but the current voltage level corresponds to a voltage value of 110KV, the verification will fail. If the maximum operating voltage of power equipment A is 220KV, and the current voltage level corresponds to a voltage value of 110KV, the verification will pass. Manual verification, for example, sending the current voltage level to the terminal device of the maintenance personnel currently using the power equipment to confirm with them whether the power equipment can withstand the voltage level change. Alternatively, verification can be performed using a combination of the above two methods. For example, verifying primary power transmission equipment using equipment attributes and verifying secondary power transmission equipment using manual verification. This embodiment of the invention does not specifically limit the voltage level verification method.

[0059] It should be noted that performing voltage level verification before matching the target access status with the target line access status can avoid unnecessary damage to other power equipment in the line due to line switching, thereby greatly improving the safety of line switching.

[0060] In one embodiment of the present invention, for further explanation and limitation, sending a state switching command to the target relay includes:

[0061] The control server sends a transmission blocking command to the generator set.

[0062] When the control server receives the transmission feedback signal from the generator set based on the transmission blocking command, it sends a state switching command to the target relay.

[0063] In this embodiment of the invention, since high-voltage electrical energy is transmitted in the circuit, directly switching voltage or connecting lines without time intervals via relays could easily cause electrical sparks or damage to the lines and equipment within them. Therefore, by sending a transmission interruption command to the generator set, the generator set's power generation is stopped, thus achieving line switching during power outages. The transmission interruption command carries an interruption duration. Upon receiving the transmission interruption command, the generator set stops generating electricity according to the interruption duration. For example, if the interruption duration is 2 minutes, the generator set controls the relevant equipment to stop generating electricity from the moment the command is received, and restarts operation after 2 minutes. By including the interruption duration in the interruption command, automatic control with a single command is achieved, avoiding unnecessary extensions of generator set downtime caused by sending a restart command after the interruption command, or by manual control of sending a restart command. This allows for precise control of generator set downtime.

[0064] In one embodiment of the present invention, for further explanation and limitation, before sending a transmission blocking command to the generator set through the control server, the method further includes:

[0065] The control server obtains the transmission duration between the generator set and the circuit shunt device, and generates the blocking duration based on the safe switching duration and the transmission duration.

[0066] In this embodiment of the invention, the blocking duration is generated based on the safe switching duration and the transmission duration between the generator set and the circuit shunt device. Specifically, the blocking duration can be obtained by summing the safe switching duration and the transmission duration, or by multiplying the sum of the safe switching duration and the transmission duration by a preset adjustment coefficient. This embodiment of the invention does not impose a specific limitation. The safe switching duration is obtained by predicting different transformer levels based on a line switching prediction model. The line switching prediction model is constructed based on a minimum support vector machine, and the kernel function of the line switching prediction model is determined by solving the whale algorithm. The minimum support vector machine can be a least squares support vector machine, a least squares twin support vector machine, etc., and this embodiment of the invention does not impose a specific limitation. The following explanation uses a least-squares support vector machine (LSVM) as an example. Data on the switching time at different transformer levels, along with parameters of the relays and related power equipment during switching, are used as samples. Based on the kernel function of the LSVM, the samples are mapped to a new high-dimensional space. The optimal solution for this kernel function is then obtained using the whale algorithm, thus determining the safe switching time with the lowest risk and shortest time. The whale algorithm simulates the hunting behavior of humpback whale groups in nature. It achieves optimized search by observing the whale group's search, encirclement, pursuit, and attack of prey. The whale algorithm provides mathematical models for surrounding prey, spiral bubbles, and prey searching. Based on these three stages, the kernel function is solved to optimize it.

[0067] It should be noted that the line handover prediction model built based on minimum support vector machine is used to predict the duration of handover at different transformer levels. Since the kernel function of minimum support vector machine is solved based on the whale algorithm, the solution result of the kernel function is better and can find the optimal time series corresponding to different transformer levels, thereby achieving accurate prediction of safe handover duration.

[0068] In one embodiment of the present invention, for further explanation and limitation, after sending a state switching command to the target relay, the method further includes:

[0069] The control server monitors the expected access status of each line connected in the line relay group.

[0070] If at least two of the relays are expected to be in the path access state, then a dual-path alarm message is generated through the control server.

[0071] If the dual-path alarm information is verified by the control server's line, then the switching operation of the relay is initiated.

[0072] In this embodiment of the invention, after sending a state switching command to the target relay to be controlled, the expected access status of each line is monitored. The expected access status includes the current access status of relays that have not received a state switching command, and the expected access status of relays that have received a state switching command after executing the command. Since electrical energy is usually transmitted through a single line, if two or more lines are expected to be connected, it indicates a risk of control anomalies. For example, a disconnect command may not have been sent to a relay that needs to be disconnected, or a communication anomaly may have prevented the relay from receiving the switching command. In such cases, a dual-path alarm message indicating two or more lines are connected needs to be generated. This alarm message may include information such as the line number and carrying capacity of the specific path for line verification of the current line access status. Line verification mainly verifies whether the voltage carrying capacity of the line matches the current transformer level. For example, if the transformer level voltage is 330kV, and only one line in the shunt device can carry the transmission of electrical energy at this voltage, but two lines are expected to be connected, the verification result is a failure, and the target relay's opening and closing switching operation cannot be initiated. For example, if the transformer voltage is 110kV, and the line shunt equipment includes line #1 capable of carrying 110kV and line #2 capable of carrying 220kV, then if the line information in the dual-path alarm message matches line #1 and line #2, the line verification passes, and the target relay switching operation can be initiated. By verifying the lines, abnormal line connections can be detected in a timely manner, preventing overload of the lines and thus protecting the safety of line switching.

[0073] This invention provides an intelligent control method for the power collection lines of a wind turbine generator set. The method involves a control server acquiring the transformer level corresponding to the generator set, where the transformer level characterizes the voltage level after power transformation. Once the control server determines the target relay corresponding to the transformer level based on the transformer-line mapping relationship, it acquires the connection status of all relays in the line relay group and determines the target connection status of the target relay based on the relay connection status. If the target connection status does not match the connection status of the target line corresponding to the transformer level, a status switching command is sent to the target relay to switch the relay on and off. The line relay group includes at least two relays, each connected to a line in a circuit shunt device. The circuit shunt device is a line shunt device with at least three terminals, avoiding the need to modify the corresponding lines when the transformer is replaced or its transformer parameters are changed. This significantly reduces the manpower and time costs of line modification, improves the flexibility of line switching, and ensures accurate matching between lines with different voltage carrying capacities and transformer levels, thereby effectively improving the efficiency of power transmission in the power system.

[0074] Furthermore, as a response to the above Figure 1 The implementation of the method shown in this invention provides an intelligent control system for the collector lines of a wind turbine generator set, as described in this embodiment. Figure 6 As shown, the system includes:

[0075] 31. Control server; 32. Generator set; 33. Transformer; 34. Line relay group; 35. Circuit shunt equipment.

[0076] The control server 31 collects the voltage level of the transformer 33 corresponding to the generator set 32. The voltage level is used to characterize the voltage level after the power is transformed. After the control server determines the target relay corresponding to the voltage level based on the transformer line mapping relationship, it collects the connection status of all relays in the line relay group 34, and determines the target connection status of the target relay according to the connection status of the relays. If the target connection status does not match the connection status of the target line corresponding to the voltage level, a status switching command is sent to the target relay to make the relay switch between opening and closing.

[0077] The line relay group 34 includes at least two relays, each of which is connected to a line in the circuit shunt device 35. The circuit shunt device 35 is a line shunt device with at least three terminals.

[0078] Furthermore, the relay connection state includes the relay closed state and the relay open state.

[0079] The control server 31 is also used to determine the usage status of the primary power transmission equipment and secondary power transmission equipment associated with the transformer if the access status of the target relay is in the open circuit state; and after the usage status is verified by the voltage level, determine whether the target access status matches the access status of the target line.

[0080] The primary power transmission equipment is used to characterize equipment that has a direct connection with the lines in the circuit shunt equipment, and the secondary power transmission equipment is used to characterize equipment that has an indirect connection with the lines in the circuit shunt equipment.

[0081] Furthermore, the control server is specifically used to send a transmission blocking command to the generator set, the transmission blocking command carrying a blocking duration; when the control server receives a transmission feedback signal from the generator set based on the transmission blocking command, it sends a state switching command to the target relay.

[0082] Furthermore, the control server is specifically used to obtain the transmission duration between the generator set and the circuit shunt device, and generate the blocking duration based on the safe switching duration and the transmission duration; wherein, the safe switching duration is obtained by predicting different transformer levels based on a line switching prediction model, and the line switching prediction model is constructed based on a minimum support vector machine, and the kernel function of the line switching prediction model is determined by solving the whale algorithm;

[0083] The control server is further configured to monitor the expected access status of each line in the line relay group; if at least two of the relays are expected to be in a path access status, a dual-path alarm message is generated by the control server; if the dual-path alarm message is verified by the line of the control server, the opening and closing switching operation of the relay is initiated.

[0084] According to one embodiment of the present invention, a storage medium is provided, the storage medium storing at least one executable instruction, which can execute the intelligent control method for wind turbine generator collection lines in any of the above method embodiments.

[0085] It is obvious to those skilled in the art that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. Optionally, they can be implemented using computer-executable program code, thereby storing them in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those presented herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0086] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for intelligent control of the collector line of a wind turbine generator set, characterized in that, include: The voltage level of the transformer corresponding to the generator set is collected by the control server. The voltage level is used to characterize the voltage level after the power is transformed. After the control server determines the target relay corresponding to the transformer level based on the transformer line mapping relationship, it collects the connection status of all relays in the line relay group and determines the target connection status of the target relay based on the relay connection status. If the target access status does not match the access status of the target line corresponding to the transformer level, a status switching command is sent to the target relay to make the relay switch between opening and closing. The line relay group includes at least two relays, each of which is connected to a line in the circuit shunt device, and the circuit shunt device is a line shunt device with at least three terminals. The relay access status includes relay on state and relay off state. After collecting the access status of all relays in the line relay group and determining the target access status of the target relay based on the relay access status, the method further includes: If the target relay is in an open circuit state, the usage status of the primary and secondary power transmission equipment associated with the transformer is determined by the control server. After the usage state is verified by the voltage level, it is determined whether the target access state matches the access state of the target line. The primary power transmission equipment is used to characterize equipment that has a direct connection with the lines in the circuit shunt equipment, and the secondary power transmission equipment is used to characterize equipment that has an indirect connection with the lines in the circuit shunt equipment. After sending the state switching command to the target relay, the method further includes: The control server monitors the expected access status of each line connected in the line relay group. If at least two of the relays are expected to be in the path access state, then a dual-path alarm message is generated through the control server. If the dual-path alarm information is verified by the control server's line, then the switching operation of the relay is initiated.

2. The method according to claim 1, characterized in that, Sending the state switching command to the target relay includes: The control server sends a transmission blocking command to the generator set, and the transmission blocking command carries the blocking duration. When the control server receives the transmission feedback signal from the generator set based on the transmission blocking command, it sends a state switching command to the target relay.

3. The method according to claim 2, characterized in that, Before sending a transmission blocking command to the generator set via the control server, the method further includes: The control server obtains the transmission duration between the generator set and the circuit shunt device, and generates the blocking duration based on the safe switching duration and the transmission duration. The safe switching time is obtained by predicting different transformer levels based on the line switching prediction model. The line switching prediction model is constructed based on the minimum support vector machine, and the kernel function of the line switching prediction model is determined based on the whale algorithm.

4. An intelligent control system for the collector lines of a wind turbine generator set, characterized in that, include: Control server, generator set, transformer, line relay group, circuit shunt equipment, The control server collects the transformer level of the transformer corresponding to the generator set, which is used to characterize the voltage level after the power is transformed. After the control server determines the target relay corresponding to the transformer level based on the transformer line mapping relationship, it collects the connection status of all relays in the line relay group and determines the target connection status of the target relay according to the connection status of the relays. If the target connection status does not match the connection status of the target line corresponding to the transformer level, a status switching command is sent to the target relay to make the relay switch between opening and closing. The line relay group includes at least two relays, each of which is connected to a line in the circuit shunt device, and the circuit shunt device is a line shunt device with at least three terminals. The relay connection status includes relay on state and relay off state. The control server is also used to determine the usage status of the primary power transmission equipment and secondary power transmission equipment associated with the transformer if the access status of the target relay is in the open circuit state; and after the usage status is verified by the voltage level, to determine whether the target access status matches the access status of the target line. The primary power transmission equipment is used to characterize equipment that has a direct connection with the lines in the circuit shunt equipment, and the secondary power transmission equipment is used to characterize equipment that has an indirect connection with the lines in the circuit shunt equipment. The control server is further configured to monitor the expected access status of each line in the line relay group; if at least two of the relays are expected to be in a path access status, a dual-path alarm message is generated by the control server; if the dual-path alarm message is verified by the line of the control server, the opening and closing switching operation of the relay is initiated.

5. The system according to claim 4, characterized in that, The control server is specifically used to send a transmission blocking command to the generator set, the transmission blocking command carrying a blocking duration; when the control server receives a transmission feedback signal from the generator set based on the transmission blocking command, it sends a state switching command to the target relay.

6. The system according to claim 5, characterized in that, The control server is further configured to obtain the transmission duration between the generator set and the circuit shunt device, and generate the blocking duration based on the safe switching duration and the transmission duration; wherein the safe switching duration is obtained by predicting different transformer levels based on a line switching prediction model, the line switching prediction model is constructed based on a minimum support vector machine, and the kernel function of the line switching prediction model is determined based on the whale algorithm.

7. The system according to claim 6, characterized in that, The circuit shunt device includes a line input terminal and at least two line output terminals, wherein the transformer level of the line input terminal is higher than the transformer level of the line output terminals.

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