High-voltage direct-current converter station power control method and device, computer equipment, readable storage medium and program product

Abstract

The invention relates to a power control method and device for a high-voltage direct-current converter station, computer equipment, a computer readable storage medium and a computer program product, relates to the field of power control, and can improve the power control efficiency of the high-voltage direct-current converter station. The method comprises the following steps: receiving first direct current power plan data sent by a scheduling end to a centralized control end through a first communication channel; the scheduling end also sends second direct-current power plan data to the execution end through a second communication channel; determining a centralized control end control instruction of the current power according to the first power control mode and the first direct current power plan data; and sending the centralized control end control instruction to an execution end, so that the execution end performs first power control according to the centralized control end control instruction based on the current control authority after receiving the centralized control end control instruction, or performs second power control according to the second power control mode and the second direct current power plan data.

Description

Technical Field

[0001] The present application relates to the technical field of power control, and particularly to a power control method, device, computer device, computer-readable storage medium, and computer program product for a high-voltage direct current converter station. Background Art

[0002] Currently, the power control of ultra (extra) high-voltage direct current converter stations mainly relies on the direct communication between the dispatching end and the station end to achieve, and its automatic regulation function highly depends on the smoothness of the single communication link from the dispatching end to the station end. However, this control link architecture has certain risks. When the communication between the dispatching end and the station end is interrupted due to channel or equipment failures, the system will completely lose its automatic power regulation ability and be forced to degrade to telephone instructions and manual control with low reliability and prone to human errors, seriously threatening the safe and stable operation of the power grid and having low efficiency. Summary of the Invention

[0003] Based on this, it is necessary to provide a power control method, device, computer device, computer-readable storage medium, and computer program product for a high-voltage direct current converter station in view of the above technical problems.

[0004] In a first aspect, the present application provides a power control method for a high-voltage direct current converter station. The method is applied to a centralized control end in a power control system of a high-voltage direct current converter station. The centralized control end is connected to a dispatching end and an execution end in the power control system through a first communication channel, and the dispatching end is directly connected to the execution end through a second communication channel;

[0005] The method includes:

[0006] Receiving first direct current power plan data sent by the dispatching end to the centralized control end through the first communication channel; the dispatching end also sends second direct current power plan data to the execution end through the second communication channel;

[0007] Determining a centralized control end control instruction for the current power according to a first power control mode and the first direct current power plan data;

[0008] Sending the centralized control end control instruction to the execution end, so that after receiving the centralized control end control instruction, the execution end performs first power control according to the centralized control end control instruction based on the current control authority, or performs second power control according to a second power control mode and the second direct current power plan data; the control authority includes centralized control end control or execution end control.

[0009] In one embodiment, before determining the centralized control end control instruction for the current power according to the first power control mode and the first direct current power plan data, it further includes:

[0010] Obtain the current control authority, the first power control mode of the centralized control terminal, and the working mode of the execution terminal;

[0011] If the current control authority is the centralized control terminal control and the working mode of the execution terminal meets the preset conditions, then trigger the execution of the centralized control terminal control instruction for determining the current power according to the first power control mode and the first DC power plan data.

[0012] In one embodiment, the centralized control terminal control instruction for determining the current power according to the first power control mode and the first DC power plan data includes:

[0013] If the first power control mode is the first control mode, then determine the centralized control terminal control instruction according to the first DC power plan data;

[0014] If the first power control mode is the second control mode, then obtain the predefined power adjustment parameters as the centralized control terminal control instruction to directly control the current power.

[0015] In one embodiment, after sending the centralized control terminal control instruction to the execution terminal, it further includes:

[0016] In the case where the current control authority is the centralized control terminal control, obtain the DC power feedback data after the execution terminal executes the centralized control terminal control instruction;

[0017] Compare the first DC power plan data with the DC power feedback data to obtain a power comparison result;

[0018] If the power comparison result indicates abnormal power control, generate an abnormal feedback reminder signal;

[0019] Display the first DC power plan data, the DC power feedback data, the power comparison result, and the abnormal feedback reminder signal.

[0020] In one embodiment, the execution terminal is used for:

[0021] After receiving the centralized control terminal control instruction, obtain the control authority of the current power set on the execution terminal;

[0022] If the control authority is the centralized control terminal control, then perform the first power control according to the centralized control terminal control instruction sent by the centralized control terminal;

[0023] If the control authority is the control of the execution end, the centralized control end control instruction is not executed, and according to the second power control mode and the second DC power plan data sent by the dispatching end, the execution end control instruction of the current power is determined to perform the second power control.

[0024] In one embodiment, after sending the centralized control end control instruction to the execution end, it further includes:

[0025] Obtain the control authority sent by the execution end to the centralized control end through the first communication channel, and update the control authority set on the centralized control end according to the control authority sent by the execution end;

[0026] Among them, the control authority sent by the execution end is obtained by the execution end updating the control authority set on the execution end according to the power control demand change information.

[0027] In a second aspect, the present application further provides a high-voltage DC converter station power control device, which is applied to the centralized control end in the high-voltage DC converter station power control system. The centralized control end is connected to the dispatching end and the execution end in the power control system through the first communication channel, and the dispatching end is directly connected to the execution end through the second communication channel. The device includes:

[0028] A power plan data receiving module, configured to receive the first DC power plan data sent by the dispatching end to the centralized control end through the first communication channel; the dispatching end also sends the second DC power plan data to the execution end through the second communication channel;

[0029] A control instruction determining module, configured to determine the centralized control end control instruction of the current power according to the first power control mode and the first DC power plan data;

[0030] A power control module, configured to send the centralized control end control instruction to the execution end, so that after receiving the centralized control end control instruction, the execution end performs the first power control according to the centralized control end control instruction based on the current control authority, or performs the second power control according to the second power control mode and the second DC power plan data; the control authority includes centralized control end control or execution end control.

[0031] In a third aspect, the present application further provides a computer device, including a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, it implements the steps of the high-voltage DC converter station power control method described in any one of the above.

[0032] Fourthly, the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the high-voltage DC converter station power control method described in any one of the above are implemented.

[0033] Fifthly, the present application further provides a computer program product, including a computer program. When the computer program is executed by a processor, the steps of the high-voltage DC converter station power control method described in any one of the above are implemented.

[0034] The above-mentioned high-voltage DC converter station power control method, device, computer device, computer-readable storage medium and computer program product applied to the centralized control terminal receive the first DC power plan data sent by the dispatching terminal to the centralized control terminal through the first communication channel; the dispatching terminal also sends the second DC power plan data to the executing terminal through the second communication channel; according to the first power control mode and the first DC power plan data, determine the control instruction of the centralized control terminal for the current power; send the control instruction of the centralized control terminal to the executing terminal, so that after receiving the control instruction of the centralized control terminal, the executing terminal, based on the current control authority, performs the first power control according to the control instruction of the centralized control terminal, or performs the second power control according to the second power control mode and the second DC power plan data; the control authority includes centralized control terminal control or executing terminal control. By the dispatching terminal sending the same DC power plan curve in parallel to the centralized control terminal and the executing terminal, the centralized control terminal can hold a DC power plan data synchronized with the executing terminal in real time. On this basis, when the control right is switched, by allowing the centralized control terminal to independently calculate an accurate power adjustment instruction based on the DC power plan data, and finally, before physical execution, the executing terminal performs a local control authority verification on the source of the instruction, a complete redundant control path from the data source, to the decision-making, and then to the final execution is constructed. This design enables the system to be seamlessly taken over by the standby path with the latest data when the main communication link fails, and continue to perform accurate automatic control, thus solving the technical problem in the prior art that due to a single-point communication failure, it must be degraded to a high-risk manual operation, greatly improving the safety and reliability of the power grid operation, and thus improving the control efficiency of the DC converter station. Description of the Drawings

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments of the present application or related technologies. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0036] Figure 1 It is a schematic flowchart of the high-voltage DC converter station power control method in an embodiment;

[0037] Figure 2 It is a schematic flow chart of the power control method for a high - voltage DC converter station in another embodiment;

[0038] Figure 3 It is a schematic flow chart of the power control method for a high - voltage DC converter station in yet another embodiment;

[0039] Figure 4 It is a schematic flow chart of the power control method for a high - voltage DC converter station in still another embodiment;

[0040] Figure 5 It is a structural block diagram of the power control device for a high - voltage DC converter station in one embodiment;

[0041] Figure 6 It is an internal structure diagram of a computer device in one embodiment. Detailed implementation manners

[0042] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0043] It should be noted that the terms "first", "second", etc. used in the present application can be used to describe various objects, but these objects are not limited by these terms. These terms are only used to distinguish the first object from the second object. The terms "including" and "having" used in the present application and any variations thereof are intended to cover non - exclusive inclusion. The term "plural" used in the present application refers to two or more.

[0044] In one embodiment, as Figure 1 shown, a power control method for a high - voltage DC converter station is provided. In this embodiment, it is described that the method is applied to the centralized control terminal in the power control system of the high - voltage DC converter station. The centralized control terminal is connected to the dispatching terminal and the executing terminal in the power control system through the first communication channel respectively, and the dispatching terminal is directly connected to the executing terminal through the second communication channel. In this embodiment, the method includes the following steps:

[0045] Step S102, receiving the first DC power plan data sent by the dispatching terminal to the centralized control terminal through the first communication channel; the dispatching terminal also sends the second DC power plan data to the executing terminal through the second communication channel.

[0046] The first DC power plan data and the second DC power plan data are equivalent in content. Both refer to structured data generated by the dispatcher that contains a series of time points and corresponding power setpoints, and can be represented as a power plan curve. The first communication channel refers to the newly added redundant communication network connecting the dispatcher, centralized control, and execution end, while the second communication channel refers to the traditional, direct communication network connecting the dispatcher and execution end. Both are used to carry physical and logical links for data transmission, such as dedicated power fiber optic networks, microwave communications, or secure VPNs based on operator networks.

[0047] For example, the dispatcher generates new DC power plan data at a preset interval (for example, every 15 minutes). The dispatcher then uses a publish-subscribe mechanism to publish this data as the latest version to both the centralized control and execution terminals. Upon receiving the data, the centralized control and execution terminals parse, verify, and update their local storage, ensuring that the content and version of the power plan data held by both terminals remain strictly synchronized.

[0048] Optionally, the DC power plan data includes but is not limited to a time series curve containing a series of timestamps and corresponding power values. In an alternative embodiment, the data can be a rule-based policy set. For example, the plan data issued by the dispatching end can be defined as: within the next 4 hours, if the grid frequency is stable in the range of 50±0.05Hz, it will operate according to curve A; if the frequency drops below 49.90Hz, the emergency support strategy B will be immediately executed to increase the power to 95% of the rated value. This condition-based policy set also falls within the scope of power plan data, providing a richer decision-making basis for the control logic of the centralized control end and the execution end.

[0049] Step S104: determining a centralized control terminal control instruction for current power according to the first power control mode and the first DC power plan data.

[0050] Among them, the first power control mode can be a specific control strategy or algorithm set and executed at the centralized control end, which defines how the centralized control end generates instructions based on the power plan data. For example, it can be a power-curve on-site execution (Power-Schedule Local Control, SLC) mode that automatically tracks the power curve, or a manual control (Local Manual Control, LMC) mode that requires human intervention. The SLC mode means that the control of DC power is in the hands of the on-site control system. The dispatcher sends the power curve to the site; after receiving the power curve, the on-site operator imports the power curve into the control system; the DC control system adjusts the DC power according to the power curve. The LMC mode means that the control of DC power is in the hands of the on-site control system. The on-site operator manually sets parameters to adjust the DC power based on the power set value and change rate issued by the dispatcher.

[0051] Exemplarily, the centralized control terminal can be triggered only after confirming that it has obtained the control authority over the execution terminal. Optionally, after being triggered, the centralized control terminal will first read the first power control mode set locally. If the mode is the automatic tracking mode, the centralized control terminal will read the current system time at a high frequency (e.g., in seconds), interpolate and calculate the accurate target power value at the current moment from the power plan data stored locally, and then compare it with the real-time power uploaded from the execution terminal. A smooth and accurate adjustment instruction will be generated through a control algorithm as the control instruction of the centralized control terminal.

[0052] Optionally, in the process of determining the control instruction, the centralized control terminal not only considers the power plan data, but also simultaneously considers multiple input variables such as electricity price, equipment loss model, and new energy fluctuation prediction. The centralized control terminal calculates a control instruction with the highest comprehensive operation benefit (e.g., the lowest power purchase cost or the smallest equipment loss) on the premise of meeting the basic requirements of the power plan through an optimization algorithm (such as the particle swarm algorithm).

[0053] Step S106: Send the control instruction of the centralized control terminal to the execution terminal, so that after receiving the control instruction of the centralized control terminal, the execution terminal performs the first power control according to the control instruction of the centralized control terminal based on the current control authority, or performs the second power control according to the second power control mode and the second DC power plan data; the control authority includes centralized control by the centralized control terminal or control by the execution terminal.

[0054] Among them, the first power control can be the behavior of the execution terminal receiving and executing the control instruction from the centralized control terminal. The second power control can be the behavior of the execution terminal ignoring the instruction of the centralized control terminal and performing autonomous control according to the plan data directly received from the dispatching terminal and the control mode set by itself in the normal mode. The control authority is the final basis stored and decided locally at the execution terminal to determine whether to perform the first power control or the second power control, and it is a unique logic switch.

[0055] Exemplarily, after generating the control instruction, the centralized control terminal will send it out through the first communication channel. After receiving the instruction, the execution terminal will perform a local authority check. It will read the control authority value stored internally. If the value is centralized control by the centralized control terminal, the execution terminal determines that the instruction is legal and performs power adjustment, which is the execution of the first power control.

[0056] Optionally, when performing the first power control, the execution end does not execute blindly. Instead, it performs the execution by incorporating a safety constraint logic. For example, even if it receives a power increase instruction from the centralized control end, if the execution end detects that the temperature of the local converter transformer has exceeded the safety threshold, it can veto or limit the execution amplitude of the instruction and report a status information of constrained execution or vetoed execution to the centralized control end. This execution method with local safety constraints also belongs to the category of the first power control according to the control instruction of the centralized control end, but it adds additional safety redundancy. If the verified permission value is for the execution end to control, the execution end will discard the instruction from the centralized control end and continue to perform the second power control.

[0057] In this embodiment, the dispatching end sends the same DC power plan curve to the centralized control end and the execution end in parallel, enabling the centralized control end to hold a DC power plan data synchronized with the execution end in real time. On this basis, after the control right is switched, by allowing the centralized control end to independently calculate accurate power adjustment instructions based on this blueprint, and finally having the execution end perform a local control permission verification on the source of the instruction before physical execution, a complete redundant control path from the data source, to the decision-making, and then to the final execution is constructed. This design enables the system to be seamlessly taken over by the standby path with the latest data and continue to perform accurate automatic control in case of a main communication link failure, thereby solving the technical problem in the prior art that it has to be degraded to a high-risk manual operation due to a single-point communication failure, greatly improving the safety and reliability of the power grid operation, and thus enhancing the control efficiency of the DC converter station.

[0058] In an exemplary embodiment, before determining the control instruction of the centralized control end for the current power according to the first power control mode and the first DC power plan data, it further includes:

[0059] Obtain the current control permission, the first power control mode of the centralized control end, and the working mode of the execution end; if the current control permission is for the centralized control end to control and the working mode of the execution end meets the preset conditions, trigger the execution of determining the control instruction of the centralized control end for the current power according to the first power control mode and the first DC power plan data.

[0060] Among them, the working mode of the execution end is the limited operating state defined by its internal state machine in which the execution end is currently located. It can be a status flag set by the local operator or automatically switched by the system, such as the automatic mode, the manual mode, the maintenance mode, etc., which is used to determine whether the execution end actively controls according to the internal logic or waits passively for external instructions. The preset conditions are one or more safety prerequisites that the centralized control end must confirm that the execution end has met before attempting to take over control, and its function is to ensure that the handover process of the control right is smooth and conflict-free.

[0061] For example, when the centralized control terminal detects that control authority has been transferred to it, it does not immediately generate a control instruction. Instead, it first initiates a status query request to the execution terminal via the first communication channel to obtain the execution terminal's current operating mode. After receiving the query, the execution terminal transmits its current operating mode (for example, manual mode) back to the centralized control terminal. The centralized control terminal compares the received operating mode with internally stored preset conditions.

[0062] Specifically, in this embodiment, the pre-set condition is that the execution end must be in manual mode. Only when the centralized control end confirms that the current control authority is the centralized control end and the received execution end operating mode is manual, will the verification process pass and authorization be granted to continue execution at step S104. If either condition is not met, the centralized control end will interrupt the control process and issue an alert to the operator that the takeover conditions have not been met.

[0063] In this embodiment, by adding a pre-step of verifying the working mode of the execution end before the centralized control end generates instructions, a secure handshake confirmation mechanism for the control transfer process is implemented, thereby achieving the technical effect of preventing the centralized control end from forcibly issuing instructions when the execution end is not yet ready (for example, still in the automatic adjustment state) and causing control conflicts or system disturbances.

[0064] In an exemplary embodiment, determining a centralized control terminal control instruction for current power according to the first power control mode and the first DC power plan data includes:

[0065] If the first power control mode is the first control mode, the centralized control end control instruction is determined according to the first DC power plan data; if the first power control mode is the second control mode, the predefined power adjustment parameters are obtained as the centralized control end control instruction to directly control the current power.

[0066] The first control mode, in this embodiment, may be an SLC control mode implemented at the centralized control end, whose function is to automatically and accurately track the power plan curve. The second control mode, in this embodiment, may be an LMC control mode implemented at the centralized control end, whose core function is to provide operators with a direct and flexible manual intervention interface.

[0067] Specifically, if the centralized control terminal's local first power control mode is set to the first control mode, its internal automatic control application will be activated. This application will accurately search the stored first DC power plan data for the corresponding target power value based on the current system time at a frequency of seconds, and automatically calculate specific adjustment instructions based on this target value.

[0068] If the first power control mode at the centralized control terminal is set to the second control mode, the system will activate a human-machine interface. This interface can respond to the operator's input to obtain predefined power adjustment parameters (for example, manually input a target power value of 800 MW and a change rate of 50 MW / minute for emergency support) as the centralized control terminal control instruction to achieve direct and rapid intervention in the current power.

[0069] In this embodiment, by clearly distinguishing and implementing at least two specific control modes at the centralized control terminal, the flexible switching between the control strategy in automatic regulation and manual intervention is realized, thereby achieving the technical effects of enhancing the adaptability and operability of the entire system for different operating conditions (for example, daily plan tracking and power grid emergency accident handling).

[0070] In an exemplary embodiment, after sending the centralized control terminal control instruction to the execution terminal, it further includes:

[0071] In the case where the current control authority is the centralized control terminal control, obtain the DC power feedback data after the execution terminal executes the centralized control terminal control instruction; compare the first DC power plan data with the DC power feedback data to obtain a power comparison result; if the power comparison result indicates abnormal power control, generate an abnormal feedback reminder signal; display the first DC power plan data, the DC power feedback data, the power comparison result, and the abnormal feedback reminder signal.

[0072] Among them, the DC power feedback data can be a telemetry message containing high-precision actual power measurement values and corresponding timestamps, which is collected and uploaded by the execution terminal in real time. The power comparison result can be the numerical deviation between the planned power and the actual power at the same moment, such as the absolute difference or relative percentage. The abnormal feedback reminder signal can be a logic signal generated by the centralized control terminal system internally when the power comparison result exceeds the preset safety threshold and is used to trigger an alarm action.

[0073] Specifically, the centralized control terminal continuously receives the DC power feedback data from the execution terminal. Whenever a new feedback data point is received, the planned power value at the same time point can be immediately found from the first DC power plan data stored locally, and the deviation between the two is calculated as the power comparison result. For example, if the planned value is 500 MW and the feedback value is 475 MW at a certain moment, the comparison result is -25 MW. This result is compared with an alarm threshold that can be configured by the user (for example, ±20 MW). In this embodiment, since -25 MW exceeds the threshold, the system immediately generates an abnormal feedback reminder signal. This signal triggers a series of actions: on the power curve of the monitoring interface, the color of the deviation point becomes red; an alarm window containing the deviation details pops up on the screen; at the same time, the system may drive the speaker to issue an audible alarm. All these planned data, feedback data, comparison results, and alarm signals are centrally and visually displayed on the same monitoring interface.

[0074] In this embodiment, by constructing a complete closed-loop monitoring process of plan distribution, instruction execution, status feedback, and real-time comparison, the online evaluation of the execution effect of power control is realized in real time and quantitatively, so as to achieve the technical effect of being able to immediately detect the execution error of control instructions and provide intuitive and clear decision-making basis for operators.

[0075] In an exemplary embodiment, the execution terminal is used for:

[0076] After receiving the control instruction from the centralized control terminal, obtain the control authority of the current power set at the execution terminal; if the control authority is centralized control by the centralized control terminal, perform the first power control according to the centralized control instruction sent by the centralized control terminal; if the control authority is execution terminal control, do not execute the centralized control instruction, and determine the execution terminal control instruction of the current power according to the second power control mode and the second DC power plan data sent by the dispatching terminal to perform the second power control.

[0077] Specifically, when the execution terminal receives any control instruction from the centralized control terminal through the first communication channel, its internal logic does not immediately execute the instruction. The execution terminal can first access an internal status register that records the current control authority. If the read authority value is centralized control by the centralized control terminal, the execution terminal confirms the legality of the instruction and passes it to the lower-level physical execution unit (such as the valve control system) to perform the first power control. If the read authority value is execution terminal control, the execution terminal determines that the instruction is illegal or an overstep instruction, immediately does not execute it and discards it, and can record a system log of receiving an overstep instruction. After that, it continues to perform the second power control according to the second DC power plan data received from the dispatching terminal and the second power control mode set locally.

[0078] In one embodiment, the execution end performs power control specifically through the process shown in Figure 2 as follows. The process starts from the dispatching end. The dispatching end generates a DC power plan curve message and uses it to send the message to both the centralized control end and the execution end simultaneously. When the power control authority is set to the execution end, after receiving and successfully parsing the message, the centralized control end performs data storage and display operations for monitoring; since it determines that the power control authority does not belong to itself, it does not generate a power control instruction. Correspondingly, the execution end determines that it has the power control authority and then performs power adjustment according to the power plan received from the dispatching telecontrol path. Or, in another implementation, when the power control authority is set to the centralized control end, after parsing and storing the message, since the centralized control end determines that it has the power control authority, it is triggered to generate and issue a power control instruction. The instruction is sent via the centralized control telecontrol path and undergoes another authority confirmation before final execution. At this time, the execution end determines that it does not have the power control authority, so it will reject the information from the dispatching telecontrol path. Finally, the execution end only receives and executes the legal instruction from the centralized control end that has passed the authority confirmation to complete a secure power control dominated by the redundant path.

[0079] In this embodiment, through the above steps, the verification of the source of the control instruction achieves the goal of ensuring that the execution segment receives the command from the only legal instruction source in any case, eliminating the risk of control conflicts that may be caused by the redundant design.

[0080] In an exemplary embodiment, after sending the centralized control end control instruction to the execution end, it further includes:

[0081] Obtaining the control authority sent by the execution end to the centralized control end through the first communication channel, and updating the control authority set in the centralized control end according to the control authority sent by the execution end;

[0082] Among them, the control authority sent by the execution end is obtained by the execution end updating the control authority set in the execution end according to the power control requirement change information.

[0083] Among them, the power control requirement change information can be a trigger event or an operation command that causes the need for control right switching. For example, the fault information that the second communication channel between the execution end local system and the dispatching end is interrupted for a long time detected by the execution end local system, or it can also be an authorization command for the local operator to request permission switching.

[0084] Specifically, in response to the change information of power control requirements, the execution end first updates its own control authority status from execution-end control to centralized-control end control. After completing the local update, the execution end immediately encapsulates this new authority status (i.e., centralized-control end control) into a status update message and actively sends it to the centralized-control end through the first communication channel. After receiving this message, the centralized-control end parses the new authority status and synchronously updates the control authority set at the centralized-control end, thus logically completing the handover of control rights. This process clarifies the source and flow of authority, that is, the source of the control location is the execution end.

[0085] In this embodiment, by uniquely setting the definition and update source of the control authority at the execution end and synchronously sending it to the centralized-control end by itself, the distributed consistency management of the attribution status of the core control rights of the system is realized, thus ensuring that the authority status is clear throughout the system and providing a reliable protocol basis and implementation path for the transfer of control rights.

[0086] In an exemplary embodiment, a method for power control of a high-voltage direct current converter station is applied to a high-voltage direct current converter station power control system including a dispatching end, a centralized-control end and an execution end. This system can be as Figure 3 shown, and the steps of this control method are as Figure 4 shown, and may include:

[0087] Step S401, the dispatching end sends direct current power plan data through two parallel communication channels and synchronously sends this data to the front-end server of the centralized-control end and the general dispatching telecontrol device of the execution end.

[0088] Step S402, the execution end is directly instructed by the dispatching end to perform power control.

[0089] In the normal operation mode, when the control authority of the system is set to execution-end control, the execution end will perform autonomous power control. Specifically, after the internal direct current control and protection system of the execution end performs local authority verification, it will confirm that it has the control right, so it will activate its local substation SAC, SLC control and other modules and perform power regulation according to the power plan data directly received from the dispatching end. During this period, control modules such as the direct current SLC control of the main station system and the direct current LMC control of the main station system at the centralized-control end are in an inactive state, and their main function is to perform power monitoring functions, perform online monitoring and data comparison on the operation status of the execution end.

[0090] Among them, the second control modes that can be indicated by the dispatching end include, but are not limited to, SLC, LMC, and Automatic Direct-current Control (ADC): the right to control DC power lies with the dispatching master station. The dispatching master station directly issues control instructions to the on-site control system to adjust the DC power in real time. Power-Schedule Automatic Control (SAC): the right to control DC power lies with the on-site control system. The dispatching end issues a power curve to the on-site control system; after receiving it, the control system issues control instructions according to the power curve to adjust the DC power in real time.

[0091] Step S403: The execution end updates the control permissions of the execution end and the centralized control end.

[0092] When redundant control is required, the next logical step of the method is to perform a secure handover of control permissions. This handover is initiated by the execution end. After its DC control protection system receives the handover instruction, it will update the locally stored control permission status to the centralized control end control and immediately send this new permission status to the centralized control end through the first communication channel to ensure that the permission status of the entire system remains consistent and unique.

[0093] Step S404: The execution end performs power control as instructed by the centralized control end.

[0094] After the control permission is successfully switched, the method will enter the logical step of being dominated by the centralized control end. First, the centralized control end will perform a pre-control safety check to confirm that it has obtained control rights and that the local control module of the execution end is in a safe manual mode and other preset conditions. After passing the check, the centralized control end will determine the control instruction according to the mode selected by its internal switch button: if the DC SLC control module of the master station system is selected to be activated, the system will automatically calculate the adjustment instruction according to the received power curve; if the DC LMC control module of the master station system is selected to be activated, the operator can manually input parameters through the power manual / automatic control mode interface to generate an instruction. Finally, when this instruction is sent to the execution end through the centralized control telecontrol path, its DC control protection system will perform the last local permission check. After confirming that the permission is correct, it will accept and execute this instruction to complete a safe and accurate power control dominated by the centralized control end.

[0095] In this embodiment, the original DC converter station power adjustment mode is integrated through the above steps. On the premise of retaining the original DC power control function, the DC converter station power control mode and control position are expanded. The DC power control position can be selected according to the operation requirements, and the control position is unique, and there will be no situation where multiple control locations control the power of the DC converter station at the same time. This mode realizes the redundant expansion of the power control mode and control link of the ultra (extra) high voltage DC converter station, and greatly improves the reliability and safety of DC power adjustment.

[0096] It should be understood that although the steps in the flowcharts involved in the above embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be executed alternately or alternately with at least a part of other steps or steps or stages in other steps.

[0097] Based on the same inventive concept, an embodiment of the present application further provides a high-voltage DC converter station power control device for implementing the high-voltage DC converter station power control method involved above. The solution provided by this device to solve the problem is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the high-voltage DC converter station power control device provided below can refer to the limitations on the high-voltage DC converter station power control method in the above text, and will not be repeated here.

[0098] In an exemplary embodiment, as Figure 5 shown, a high-voltage DC converter station power control device is provided. The device is applied to the centralized control end in the high-voltage DC converter station power control system. The centralized control end is connected to the dispatching end and the execution end in the power control system through the first communication channel. The dispatching end is directly connected to the execution end through the second communication channel. The device includes: a power plan data receiving module 510, a control instruction determining module 520, and a power control module 530, where:

[0099] The power plan data receiving module 510 is configured to receive the first DC power plan data sent by the dispatching end to the centralized control end through the first communication channel; the dispatching end also sends the second DC power plan data to the execution end through the second communication channel;

[0100] A control instruction determination module 520, configured to determine a centralized control end control instruction for the current power according to the first power control mode and the first DC power plan data;

[0101] A power control module 530, configured to send the centralized control end control instruction to the execution end, so that after receiving the centralized control end control instruction, the execution end performs first power control according to the centralized control end control instruction based on the current control authority, or performs second power control according to the second power control mode and the second DC power plan data; the control authority includes centralized control end control or execution end control.

[0102] In one embodiment, the control instruction determination module 520 is further configured to obtain the current control authority, the first power control mode of the centralized control end, and the working mode of the execution end; if the current control authority is centralized control end control and the working mode of the execution end meets a preset condition, trigger the execution of determining the centralized control end control instruction for the current power according to the first power control mode and the first DC power plan data.

[0103] In one embodiment, the power control module 530 is further configured to, if the first power control mode is the first control mode, determine the centralized control end control instruction according to the first DC power plan data; if the first power control mode is the second control mode, obtain a predefined power adjustment parameter as the centralized control end control instruction to directly control the current power.

[0104] In one embodiment, the power control module 530 is further configured to, when the current control authority is centralized control end control, obtain the DC power feedback data after the execution end executes the centralized control end control instruction; compare the first DC power plan data with the DC power feedback data to obtain a power comparison result; if the power comparison result indicates abnormal power control, generate an abnormal feedback reminder signal; display the first DC power plan data, the DC power feedback data, the power comparison result, and the abnormal feedback reminder signal.

[0105] In one embodiment, the power control module 530 is further configured to obtain the control authority sent by the execution end to the centralized control end through the first communication channel, and update the control authority set on the centralized control end according to the control authority sent by the execution end; wherein, the control authority sent by the execution end is obtained by the execution end updating the control authority set on the execution end according to the power control requirement change information.

[0106] Each module in the above high-voltage DC converter station power control device can be implemented in whole or in part by software, hardware, or a combination thereof. Each of the above modules can be embedded in the processor of the computer device in hardware form or independent of it, or stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to each of the above modules.

[0107] In an exemplary embodiment, a computer device is provided. The computer device can be a centralized control terminal, and its internal structure diagram can be as Figure 6 shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit, and an input device. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface, the display unit, and the input device are connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with external terminals in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, near field communication (NFC), or other technologies. The computer program, when executed by the processor, implements a high-voltage DC converter station power control method. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device, or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen. The input device of the computer device can be a touch layer covering the display screen, or a button, a trackball, or a touchpad provided on the outer shell of the computer device, or an external keyboard, a touchpad, or a mouse, etc.

[0108] Those skilled in the art can understand that Figure 6 the structure shown in

[0109] is only a block diagram of a part of the structure related to the solution of this application, and does not constitute a limitation on the computer device to which the solution of this application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine some components, or have a different component layout.

[0110] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the foregoing method embodiments are implemented.

[0111] In one embodiment, a computer program product is provided, including a computer program. When the computer program is executed by a processor, the steps in the foregoing method embodiments are implemented.

[0112] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use, and processing of relevant data need to comply with relevant regulations.

[0113] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The databases involved in the embodiments provided in the present application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., without limitation. The processors involved in the embodiments provided in the present application can be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, data processing logics based on quantum computing, artificial intelligence (AI) processors, etc., without limitation.

[0114] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope recorded in the present application.

[0115] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A power control method for a high-voltage DC converter station, characterized in that, The method is applied to the centralized control terminal in the power control system of a high-voltage DC converter station. The centralized control terminal is connected to the dispatching terminal and the executing terminal in the power control system through a first communication channel, and the dispatching terminal is directly connected to the executing terminal through a second communication channel; The method includes: Receiving first DC power plan data sent by the dispatching terminal to the centralized control terminal through the first communication channel; the dispatching terminal also sends second DC power plan data to the executing terminal through the second communication channel; Determining a control instruction of the centralized control terminal for the current power according to a first power control mode and the first DC power plan data; Sending the control instruction of the centralized control terminal to the executing terminal, so that after receiving the control instruction of the centralized control terminal, the executing terminal performs first power control according to the control instruction of the centralized control terminal based on the current control authority, or performs second power control according to a second power control mode and the second DC power plan data; the control authority includes centralized control terminal control or executing terminal control.

2. The method according to claim 1, characterized in that Before determining the control instruction of the centralized control terminal for the current power according to the first power control mode and the first DC power plan data, it further includes: Obtaining the current control authority, the first power control mode of the centralized control terminal, and the working mode of the executing terminal; If the current control authority is centralized control terminal control and the working mode of the executing terminal meets a preset condition, trigger the execution of determining the control instruction of the centralized control terminal for the current power according to the first power control mode and the first DC power plan data.

3. The method according to claim 2, wherein Determining the control instruction of the centralized control terminal for the current power according to the first power control mode and the first DC power plan data includes: If the first power control mode is the first control mode, determining the control instruction of the centralized control terminal according to the first DC power plan data; If the first power control mode is the second control mode, obtaining a pre-defined power adjustment parameter as the control instruction of the centralized control terminal to directly control the current power.

4. The method according to claim 3, characterized in that After sending the control instruction of the centralized control terminal to the executing terminal, it further includes: When the current control authority is centralized control terminal control, obtaining DC power feedback data after the executing terminal executes the control instruction of the centralized control terminal; Comparing the first DC power plan data with the DC power feedback data to obtain a power comparison result; If the power comparison result indicates abnormal power control, generating an abnormal feedback reminder signal; Displaying the first DC power plan data, the DC power feedback data, the power comparison result, and the abnormal feedback reminder signal.

5. The method according to claim 1, characterized in that The executing terminal is used for: After receiving the control instruction of the centralized control terminal, obtaining the control authority of the current power set in the executing terminal; If the control authority is centralized control terminal control, performing first power control according to the control instruction of the centralized control terminal sent by the centralized control terminal; If the control authority is the control of the execution end, the centralized control end control instruction is not executed, and according to the second power control mode and the second DC power plan data sent by the dispatching end, the execution end control instruction of the current power is determined for the second power control.

6. The method according to any one of claims 1 to 5, characterized in that, After sending the centralized control end control instruction to the execution end, it further includes: Obtaining the control authority sent by the execution end to the centralized control end through the first communication channel, and updating the control authority set in the centralized control end according to the control authority sent by the execution end; Among them, the control authority sent by the execution end is obtained by the execution end updating the control authority set in the execution end according to the power control requirement change information.

7. A power control device for a high-voltage DC converter station, characterized in that The device is applied to the centralized control end in the power control system of the HVDC converter station. The centralized control end is connected to the dispatching end and the execution end in the power control system through the first communication channel. The dispatching end is directly connected to the execution end through the second communication channel. The device includes: A power plan data receiving module, configured to receive the first DC power plan data sent by the dispatching end to the centralized control end through the first communication channel; the dispatching end also sends the second DC power plan data to the execution end through the second communication channel; A control instruction determining module, configured to determine the centralized control end control instruction of the current power according to the first power control mode and the first DC power plan data; A power control module, configured to send the centralized control end control instruction to the execution end, so that after receiving the centralized control end control instruction, the execution end performs the first power control according to the centralized control end control instruction based on the current control authority, or performs the second power control according to the second power control mode and the second DC power plan data; the control authority includes centralized control end control or execution end control.

8. A computer device, comprising a memory and a processor, the memory storing a computer program, characterized in that, When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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