Loop parameter configuration method and system for removing low reactance of high-voltage direct current power transmission network

Abstract

The application discloses a loop parameter configuration method and system for cancelling low resistance of a high-voltage direct current power transmission network, and is applied to the technical field of power transmission systems. The method comprises the following steps: acquiring target high-voltage direct current power transmission network data; inputting direct current data into a reactive power consumption relational expression constructed by commutation valve positive conduction voltage drop data and a trigger angle, to obtain minimum reactive power consumption; analyzing and processing acquired harmonic data to obtain minimum filter capacity; determining inductive reactive power capacity based on the minimum reactive power consumption and the minimum filter capacity; dynamically adjusting and processing the inductive reactive power capacity according to the trigger angle to obtain initial loop parameters; introducing angle range conversion data to process the initial loop parameters to obtain a loop parameter configuration scheme, wherein the angle range conversion data is obtained by processing the minimum reactive power consumption and direct current power data; and executing the loop parameter configuration scheme. The method provided by the application solves the problem of how to ensure stable operation of a direct current system.

Description

Technical Field

[0001] This invention relates to the field of power transmission system technology, and in particular to a method and system for configuring loop parameters to eliminate low reactance in a high voltage direct current transmission network. Background Technology

[0002] High-voltage direct current (HVDC) transmission projects are a core means of achieving optimal allocation of energy resources. Over the past two decades, HVDC transmission technology has developed rapidly, with the construction of numerous HVDC converter stations. These stations convert energy from the northwest into direct current via alternating current, which is then transmitted over long distances to the central and eastern regions, effectively promoting the rational and optimal allocation of energy resources nationwide.

[0003] In conventional high-voltage direct current (HVDC) transmission projects, due to the influence of harmonics, the number of AC filter groups put into operation is at least two. At this time, the reactive power consumption of the DC system is relatively small, and there is a lot of reactive power capacity in the HVDC transmission network. Excessive reactive power flowing into the AC system will cause system oscillation. In order to reduce the excess reactive power, low-voltage reactors (low-voltage reactors) are usually configured to balance the excess reactive power. However, the method of configuring low-voltage reactors itself has the defect of introducing additional fault points, which will lead to a decrease in the reliability of DC system operation.

[0004] Therefore, how to ensure the stable operation of a DC system at low power without the low-voltage reactor configuration has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] This invention provides a method and system for configuring circuit parameters in a high-voltage direct current (HVDC) transmission network when low-voltage reactors are removed, solving the problem of how to ensure the stable operation of the DC system under low power conditions when the configuration of low-voltage reactors is removed.

[0006] To address the aforementioned technical problems, this invention provides a method for configuring circuit parameters to eliminate low-resistance circuits in a high-voltage direct current transmission network, the method comprising: Acquire the forward conduction voltage drop data, DC data, harmonic data, and firing angle of the converter valve in the target high-voltage direct current transmission network; The DC data of the target HVDC transmission network is input into the reactive power consumption relationship constructed by the forward conduction voltage drop data of the converter valve and the firing angle to obtain the minimum reactive power consumption; the harmonic data of the target HVDC transmission network are analyzed and processed to obtain the minimum filter capacity. Based on the minimum reactive power consumption and the minimum filter capacity, the inductive reactive power capacity of the target HVDC transmission network is determined; according to the firing angle, the inductive reactive power capacity is dynamically adjusted to obtain the initial circuit parameters. Angle range conversion data is introduced to process the initial loop parameters to obtain the loop parameter configuration scheme for canceling low reactive power in the target high voltage DC transmission network. The angle range conversion data is obtained by processing the minimum reactive power consumption and the DC power data in the DC data. Control the converter station in the target high-voltage direct current transmission network to execute the circuit parameter configuration scheme.

[0007] As one preferred embodiment, the step of analyzing and processing the acquired harmonic data of the target high-voltage direct current transmission network to obtain the minimum filter capacity includes: The harmonic data includes at least the harmonic spectrum, harmonic current flow, and harmonic amplitude. Harmonic power flow processing is performed on the harmonic spectrum, the harmonic power flow, and the harmonic amplitude to obtain a set of harmonic characteristic parameters; With the goal of minimizing the total filter capacity, the minimum filter capacity is obtained by iteratively processing the set of harmonic characteristic parameters using a filter optimization configuration algorithm.

[0008] As one preferred embodiment, the angle range conversion data is obtained by processing the minimum reactive power consumption and the DC power data in the DC data, including: The minimum reactive power consumption and the DC power data in the DC data are jointly analyzed and processed to obtain the power-reactive power characteristic curve. Based on linear fitting technology, the power-reactive characteristic curve is processed to obtain the angle range conversion data.

[0009] As one preferred embodiment, the process of processing the initial loop parameters to obtain the loop parameter configuration scheme for canceling the low-resistance circuit of the target HVDC transmission network includes: The initial loop parameters were processed using parameter optimization simulation technology to obtain multi-condition reactive power balance simulation results. The multi-condition reactive power balance simulation results are subjected to multi-objective constraint optimization to obtain the circuit parameter configuration scheme for canceling low reactive power in the target HVDC transmission network.

[0010] As one preferred embodiment, after controlling the converter station in the target HVDC transmission network to execute the loop parameter configuration scheme, the method for canceling the low-resistance loop parameter configuration of the HVDC transmission network further includes: Real-time acquisition of operating status data after executing the circuit parameter configuration scheme, the operating status data including at least reactive power exchange data, harmonic data and AC bus voltage; The operational status data is archived to form a historical database; Based on the historical database, the simulation model of the high-voltage direct current transmission network is trained, and new versions of the circuit parameter configuration scheme are generated periodically.

[0011] The present invention also provides a circuit parameter configuration system for eliminating low reactance in a high-voltage direct current transmission network, comprising: The acquisition module is used to acquire the forward conduction voltage drop data, DC data, harmonic data, and firing angle of the converter valve of the target high-voltage direct current transmission network; The analysis module is used to input the DC data of the target HVDC transmission network into the reactive power consumption relationship constructed by the forward conduction voltage drop data of the converter valve and the firing angle to obtain the minimum reactive power consumption; and to analyze and process the acquired harmonic data of the target HVDC transmission network to obtain the minimum filter capacity. The determination module is used to determine the inductive reactive power capacity of the target HVDC transmission network based on the minimum reactive power consumption and the minimum filter capacity; and to dynamically adjust the inductive reactive power capacity according to the triggering angle to obtain the initial circuit parameters. The processing module is used to introduce angle range conversion data, process the initial loop parameters, and obtain the loop parameter configuration scheme for canceling low reactive power in the target high voltage DC transmission network. The angle range conversion data is obtained by processing the minimum reactive power consumption and the DC power data in the DC data. The execution module is used to control the converter station in the target high-voltage direct current transmission network to execute the circuit parameter configuration scheme.

[0012] As one preferred embodiment, the step of analyzing and processing the acquired harmonic data of the target high-voltage direct current transmission network to obtain the minimum filter capacity includes: The harmonic data includes at least the harmonic spectrum, harmonic current flow, and harmonic amplitude. Harmonic power flow processing is performed on the harmonic spectrum, the harmonic power flow, and the harmonic amplitude to obtain a set of harmonic characteristic parameters; With the goal of minimizing the total filter capacity, the minimum filter capacity is obtained by iteratively processing the set of harmonic characteristic parameters using a filter optimization configuration algorithm.

[0013] As one preferred embodiment, the angle range conversion data is obtained by processing the minimum reactive power consumption and the DC power data in the DC data, including: The minimum reactive power consumption and the DC power data in the DC data are jointly analyzed and processed to obtain the power-reactive power characteristic curve. Based on linear fitting technology, the power-reactive characteristic curve is processed to obtain the angle range conversion data.

[0014] As one preferred embodiment, the process of processing the initial loop parameters to obtain the loop parameter configuration scheme for canceling the low-resistance circuit of the target HVDC transmission network includes: The initial loop parameters were processed using parameter optimization simulation technology to obtain multi-condition reactive power balance simulation results. The multi-condition reactive power balance simulation results are subjected to multi-objective constraint optimization to obtain the circuit parameter configuration scheme for canceling low reactive power in the target HVDC transmission network.

[0015] As a preferred embodiment, after controlling the converter stations in the target HVDC transmission network to execute the loop parameter configuration scheme, the HVDC transmission network's loop parameter configuration system for canceling low-resistance circuits further includes: Real-time acquisition of operating status data after executing the circuit parameter configuration scheme, the operating status data including at least reactive power exchange data, harmonic data and AC bus voltage; The operational status data is archived to form a historical database; Based on the historical database, the simulation model of the high-voltage direct current transmission network is trained, and new versions of the circuit parameter configuration scheme are generated periodically.

[0016] Compared with the prior art, the beneficial effects of the present invention are at least one of the following: This invention acquires forward conduction voltage drop data, DC data, harmonic data, and firing angle of the converter valves of a target HVDC transmission network; inputs the DC data of the target HVDC transmission network into a reactive power consumption relationship constructed from the forward conduction voltage drop data of the converter valves and the firing angle to obtain the minimum reactive power consumption; analyzes and processes the acquired harmonic data of the target HVDC transmission network to obtain the minimum filter capacity; determines the inductive reactive power capacity of the target HVDC transmission network based on the minimum reactive power consumption and the minimum filter capacity; dynamically adjusts the inductive reactive power capacity according to the firing angle to obtain initial loop parameters; introduces angle range conversion data to process the initial loop parameters to obtain a loop parameter configuration scheme for canceling low reactive power in the target HVDC transmission network, wherein the angle range conversion data is obtained by processing the minimum reactive power consumption and the DC power data in the DC data; and controls the converter stations in the target HVDC transmission network to execute the loop parameter configuration scheme.

[0017] Compared with existing technologies, this invention obtains the forward conduction voltage drop of the converter valve, DC data, harmonic data, and firing angle to construct a reactive power consumption relationship to calculate the minimum reactive power consumption of the DC system. It then combines harmonic analysis to determine the minimum filter capacity that meets the requirements, thereby determining the required inductive reactive power capacity. The inductive reactive power capacity is then dynamically adjusted according to the firing angle. At the same time, angle range conversion data obtained from the minimum reactive power consumption and DC power processing is introduced to optimize the initial loop parameters. Finally, a loop parameter configuration scheme that eliminates the low-voltage reactor is formed and the converter station is controlled to execute it.

[0018] This scheme enables the DC system to maintain reactive power balance through its own parameter adjustments without configuring low-voltage reactors, thereby avoiding the oscillation risk caused by reactive power excess due to fixed-connection filters in traditional schemes. While eliminating low-voltage reactors and improving system reliability, it ensures the stable operation of the DC transmission network. Attached Figure Description

[0019] Figure 1 This is a flowchart illustrating a method for configuring loop parameters to eliminate low-resistance circuits in a high-voltage direct current transmission network according to one embodiment of the present invention. Figure 2 This is a schematic diagram of the circuit parameter configuration system for canceling low reactance in a high-voltage direct current transmission network according to one embodiment of the present invention; Figure label: The module consists of: 11. Acquisition module; 12. Analysis module; 13. Determination module; 14. Processing module; and 15. Execution module. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be noted that, unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing specific embodiments only and is not intended to limit the invention. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] One embodiment of the present invention provides a method for configuring loop parameters to eliminate low-resistance in a high-voltage direct current transmission network. For details, please refer to [link to documentation]. Figure 1 , Figure 1 The diagram shown is a flowchart illustrating a method for configuring loop parameters to eliminate low reactance in a high-voltage direct current transmission network according to one embodiment of the present invention. The method includes: S1: Acquire the forward conduction voltage drop data, DC data, harmonic data, and firing angle of the converter valve of the target high-voltage direct current transmission network; S2: Input the DC data of the target HVDC transmission network into the reactive power consumption relationship constructed by the forward conduction voltage drop data of the converter valve and the firing angle to obtain the minimum reactive power consumption; analyze and process the obtained harmonic data of the target HVDC transmission network to obtain the minimum filter capacity; S3: Based on the minimum reactive power consumption and the minimum filter capacity, determine the inductive reactive power capacity of the target HVDC transmission network; according to the firing angle, dynamically adjust the inductive reactive power capacity to obtain the initial circuit parameters; S4: Introduce angle range conversion data, process the initial loop parameters, and obtain the loop parameter configuration scheme for canceling low reactive power in the target high voltage DC transmission network. The angle range conversion data is obtained by processing the minimum reactive power consumption and the DC power data in the DC data. S5: Control the converter station in the target high-voltage direct current transmission network to execute the circuit parameter configuration scheme.

[0023] Specifically, the forward conduction pressure drop data of the converter valve is a core component parameter of the converter valve. It mainly comes from the technical specifications, factory test reports or type test reports provided by the equipment manufacturer. In actual engineering, it can also be obtained and verified through on-site testing during the regular maintenance of the converter valve in operation.

[0024] DC data typically refers to DC power, DC voltage, and DC current. These are the core operating status quantities of a DC system, which are directly derived from the DC control and protection system. Specifically, they are collected in real time by sensors and measurement units at the station control layer or pole control layer and aggregated into a Supervisory Control and Data Acquisition (SCADA) system or a dedicated operating database for real-time monitoring and retrieval of historical data.

[0025] Harmonic data refers to the harmonic voltage and harmonic current spectrum on the AC and DC sides. It requires the use of dedicated harmonic monitoring devices or power quality analyzers to conduct real-time online monitoring at key measurement points such as the AC bus and DC lines of the converter station. The data is also connected to SCADA or an independent power quality management system for analysis and recording.

[0026] The firing angle is a direct output command of the converter valve control system. This data is generated in real time by the converter valve control system, such as the valve base electronics (VBE), and can be obtained in real time through the internal data bus or interface of the control system. It is the most direct and highly dynamic data in the control loop.

[0027] Specifically, the DC data of the target high-voltage direct current transmission network is input into the reactive power consumption relationship constructed by the forward conduction voltage drop data of the converter valve and the firing angle to obtain the minimum reactive power consumption.

[0028] The relation is: in, U dR DC voltage U T For the forward conduction pressure drop of the converter valve, d xR For the commutation variable inductance voltage drop, d rR For the commutation variable resistive voltage drop, I d For direct current, I dN U is the rated DC current. di0NR The rated ideal no-load DC voltage, α For the trigger angle, U di0R For ideal no-load DC voltage, The commutation angle of the inverter. To change the phase angle of the rectifier, γ The cutoff angle at the receiving end. The reactive power consumed by the converter To minimize reactive power consumption.

[0029] The forward conduction voltage drop of the converter valve directly reflects the active power loss of the valve group itself. The firing angle determines the phase relationship between the commutation voltage and current during the commutation process. Together, they determine the inherent characteristics of the reactive power consumption of the DC system. The reactive power consumption relationship constructed in this way can accurately characterize the reactive power demand of the converter valve under different operating conditions. By substituting DC data into this relationship, the minimum reactive power consumption required to meet the stable operation of the system can be calculated. The principle is that this relationship has comprehensively considered the influence of the valve group conduction characteristics and the firing angle on reactive power, and can eliminate the redundant reactive power margin in traditional control, thereby accurately obtaining the minimum reactive power value actually required by the DC system.

[0030] The acquired harmonic data of the target high-voltage direct current transmission network is analyzed and processed to obtain the minimum filter capacity. This process includes: the harmonic data includes at least the harmonic spectrum, harmonic power flow, and harmonic amplitude; harmonic power flow processing is performed on the harmonic spectrum, harmonic power flow, and harmonic amplitude to obtain a set of harmonic characteristic parameters; with the goal of minimizing the total filter capacity, the set of harmonic characteristic parameters is iteratively processed using a filter optimization configuration algorithm to obtain the minimum filter capacity.

[0031] The acquired harmonic data includes three key types of information: harmonic spectrum, harmonic power flow, and harmonic amplitude. These data are collected in real time by harmonic monitoring devices at measurement points such as the AC bus and filter branches of the converter station.

[0032] Using the collected harmonic spectrum, harmonic power flow, and harmonic amplitude as input, and combining the power grid topology and component parameters, harmonic power flow calculations are carried out. By iteratively solving the distribution of harmonic voltage at each node and harmonic current in each branch of the power grid, key parameters that meet national harmonic standards and ensure safe operation of the project are extracted, forming a set of harmonic characteristic parameters.

[0033] With the goal of minimizing the total capacity of AC filters, and using harmonic limits, voltage distortion rate, and system stability constraints as boundary conditions, a filter optimization configuration algorithm is employed for multiple rounds of iterative calculations. The number of filter groups, parameters, and switching combinations are continuously adjusted. Under the premise of ensuring that the harmonic suppression effect fully meets the requirements, the minimum filter capacity that can achieve the filtering function is gradually approached and determined. This reduces the filter capacity from the source, avoids reactive power excess, and creates conditions for eliminating low-voltage reactors.

[0034] Based on the minimum reactive power consumption and the minimum filter capacity, the inductive reactive power capacity of the target HVDC transmission network is determined; according to the triggering angle, the inductive reactive power capacity is dynamically adjusted to obtain the initial circuit parameters.

[0035] Minimum reactive power consumption is the minimum reactive power that the converter valves actually need to absorb during the operation of a high-voltage direct current (HVDC) transmission network. Minimum filter capacity is the minimum capacitive reactive power capacity required to meet harmonic mitigation requirements. Since AC filters provide capacitive reactive power to the DC system while performing filtering functions, and converter valves consume inductive reactive power during operation, matching the minimum filter capacity with the minimum reactive power consumption allows us to determine the inductive reactive power capacity that meets the reactive power requirements of the converter valves while avoiding reactive power excess. This inductive reactive power capacity is a key parameter for achieving local reactive power balance in the system and eliminating the need for low-voltage reactors.

[0036] After obtaining the inductive reactive power capacity, since the firing angle directly affects the reactive power consumption characteristics of the converter valve, and changes in the firing angle under low power operating conditions will cause significant fluctuations in the system's reactive power demand, the aforementioned inductive reactive power capacity is dynamically tracked and adjusted based on the real-time obtained firing angle, so that the inductive reactive power capacity can match the actual reactive power demand of the system in real time with the changes in the firing angle.

[0037] The angle range conversion data is obtained by processing the minimum reactive power consumption and the DC power data in the DC data, including: performing joint analysis and processing on the minimum reactive power consumption and the DC power data in the DC data to obtain the power-reactive power characteristic curve; and processing the power-reactive power characteristic curve based on linear fitting technology to obtain the angle range conversion data.

[0038] A joint analysis was conducted on the precisely calculated minimum reactive power consumption and the DC power data from the DC data set. By synchronously correlating the minimum reactive power consumption values ​​corresponding to different DC power levels, especially the low-power range, a one-to-one correspondence between the two was established, thereby plotting a complete power-reactive power characteristic curve. This curve visually presents the core law of reactive power demand variation with power across the entire power range of the DC system, with a focus on low-power conditions.

[0039] The power-reactive characteristic curves mentioned above are processed using linear fitting techniques: key feature parameters such as the slope and intercept of the curves are extracted through fitting algorithms, and the nonlinear power-reactive relationship is transformed into a concise and calculable linear expression, which is the angle range conversion data.

[0040] The initial loop parameters are processed to obtain the loop parameter configuration scheme for the target HVDC transmission network without low reactive power. This includes: processing the initial loop parameters using parameter optimization simulation technology to obtain multi-condition reactive power balance simulation results; and performing multi-objective constraint optimization processing on the multi-condition reactive power balance simulation results to obtain the loop parameter configuration scheme for the target HVDC transmission network without low reactive power.

[0041] The initial loop parameters were processed using parameter optimization simulation technology and then substituted into the high-voltage direct current transmission network simulation model. The simulation covered various typical operating scenarios, including low power, rated power, and transitional operating conditions. Reactive power balance simulation calculations were carried out under multiple operating conditions, and multiple sets of simulation results were obtained for system reactive power distribution, harmonic levels, voltage stability, etc. under different operating conditions. The reactive power balance effect and operational feasibility of the initial loop parameters under the condition of eliminating low-voltage reactors were fully verified, providing a simulation basis for subsequent optimization configuration.

[0042] Multi-objective constraint optimization is performed on the reactive power balance simulation results under multiple operating conditions. The optimization objectives are to ensure that the system has no excess reactive power, meets the harmonic standards, has stable voltage, and is reliable in operation. The constraints are the grid operation limits, equipment parameter constraints, and protection action boundaries. The loop parameters are continuously corrected through iterative optimization. Under the premise of ensuring that the grid can still operate safely and stably after the low-voltage reactor is removed, the loop parameter configuration scheme for removing the low-voltage reactor is finally obtained, which is applicable to the target HVDC transmission network and can be directly executed.

[0043] Control the converter station in the target high-voltage direct current transmission network to execute the circuit parameter configuration scheme.

[0044] After controlling the converter station in the target HVDC transmission network to execute the loop parameter configuration scheme, the method for canceling the low-resistance loop parameter configuration of the HVDC transmission network further includes: acquiring the operating status data after executing the loop parameter configuration scheme in real time, wherein the operating status data includes at least reactive power exchange data, harmonic data and AC bus voltage; archiving the operating status data to form a historical database; and training the HVDC transmission network simulation model based on the historical database to periodically generate a new version of the loop parameter configuration scheme.

[0045] Specifically, during the control phase, the control protection system (DCCP) and valve control system (VBE) of the converter station work together to execute the loop parameter configuration scheme. The optimized loop impedance, filter switching combination, firing angle adaptation parameters and other instructions are accurately sent to core equipment such as converter valves and AC filter banks to ensure that each device operates in coordination according to preset parameters, so as to achieve precise reactive power balance and stable control after the low-voltage reactor is removed.

[0046] After implementing the plan, a closed-loop optimization mechanism is further constructed: First, real-time data on the operating status of the converter station is collected, focusing on key indicators such as reactive power exchange data, harmonic data, and AC bus voltage, to comprehensively monitor the reactive power balance, harmonic suppression effect, and voltage stability of the system after the removal of low-resistance systems; then, this real-time data is classified and archived to form a historical database containing different power conditions and operating scenarios, providing real data support for subsequent parameter optimization; finally, based on this historical database, the high-voltage direct current transmission network simulation model is continuously trained and iterated, and by learning the changes in reactive power characteristics and harmonic fluctuation patterns in actual operation, a new version of the loop parameter configuration scheme with stronger adaptability is periodically generated.

[0047] Another embodiment of the present invention provides a circuit parameter configuration system for eliminating low-resistance circuits in a high-voltage direct current transmission network. For details, please refer to [link to documentation]. Figure 2 , Figure 2 The diagram shown is a schematic representation of a loop parameter configuration system for canceling low reactance in a high-voltage direct current transmission network according to one embodiment of the present invention. The system includes: The acquisition module 11 is used to acquire the forward conduction voltage drop data, DC data, harmonic data and firing angle of the converter valve of the target high voltage DC transmission network; Analysis module 12 is used to input the DC data of the target high-voltage direct current transmission network into the reactive power consumption relationship constructed by the forward conduction voltage drop data of the converter valve and the firing angle to obtain the minimum reactive power consumption; and to analyze and process the obtained harmonic data of the target high-voltage direct current transmission network to obtain the minimum filter capacity. The determination module 13 is used to determine the inductive reactive power capacity of the target high-voltage direct current transmission network based on the minimum reactive power consumption and the minimum filter capacity; and to dynamically adjust the inductive reactive power capacity according to the triggering angle to obtain the initial circuit parameters. Processing module 14 is used to introduce angle range conversion data, process the initial loop parameters, and obtain the loop parameter configuration scheme for canceling low reactive power in the target high voltage DC transmission network. The angle range conversion data is obtained by processing the minimum reactive power consumption and the DC power data in the DC data. The execution module 15 is used to control the converter station in the target high-voltage direct current transmission network to execute the circuit parameter configuration scheme.

[0048] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A method for configuring circuit parameters to eliminate low-resistance circuits in a high-voltage direct current transmission network, characterized in that, include: Acquire the forward conduction voltage drop data, DC data, harmonic data, and firing angle of the converter valve in the target high-voltage direct current transmission network; The DC data of the target HVDC transmission network is input into the reactive power consumption relationship constructed by the forward conduction voltage drop data of the converter valve and the firing angle to obtain the minimum reactive power consumption; the harmonic data of the target HVDC transmission network are analyzed and processed to obtain the minimum filter capacity. Based on the minimum reactive power consumption and the minimum filter capacity, the inductive reactive power capacity of the target HVDC transmission network is determined; according to the firing angle, the inductive reactive power capacity is dynamically adjusted to obtain the initial circuit parameters. Angle range conversion data is introduced to process the initial loop parameters to obtain the loop parameter configuration scheme for canceling low reactive power in the target high voltage DC transmission network. The angle range conversion data is obtained by processing the minimum reactive power consumption and the DC power data in the DC data. Control the converter station in the target high-voltage direct current transmission network to execute the circuit parameter configuration scheme.

2. The method for configuring circuit parameters to eliminate low-impedance in a high-voltage direct current transmission network as described in claim 1, characterized in that, The process of analyzing and processing the acquired harmonic data of the target high-voltage direct current transmission network to obtain the minimum filter capacity includes: The harmonic data includes at least the harmonic spectrum, harmonic current flow, and harmonic amplitude. Harmonic power flow processing is performed on the harmonic spectrum, the harmonic power flow, and the harmonic amplitude to obtain a set of harmonic characteristic parameters; With the goal of minimizing the total filter capacity, the minimum filter capacity is obtained by iteratively processing the set of harmonic characteristic parameters using a filter optimization configuration algorithm.

3. The method for configuring circuit parameters to eliminate low-resistance circuits in a high-voltage direct current transmission network as described in claim 1, characterized in that, The angle range conversion data is obtained by processing the minimum reactive power consumption and the DC power data in the DC data, including: The minimum reactive power consumption and the DC power data in the DC data are jointly analyzed and processed to obtain the power-reactive power characteristic curve. Based on linear fitting technology, the power-reactive characteristic curve is processed to obtain the angle range conversion data.

4. The method for configuring circuit parameters to eliminate low-resistance circuits in a high-voltage direct current transmission network as described in claim 1, characterized in that, The process of processing the initial loop parameters to obtain the loop parameter configuration scheme for canceling the low-resistance circuit of the target HVDC transmission network includes: The initial loop parameters were processed using parameter optimization simulation technology to obtain multi-condition reactive power balance simulation results. The multi-condition reactive power balance simulation results are subjected to multi-objective constraint optimization to obtain the circuit parameter configuration scheme for canceling low reactive power in the target HVDC transmission network.

5. The method for configuring circuit parameters to eliminate low-impedance in a high-voltage direct current transmission network as described in claim 4, characterized in that, After controlling the converter stations in the target HVDC transmission network to execute the circuit parameter configuration scheme, the method for canceling the low-resistance circuit parameter configuration of the HVDC transmission network further includes: Real-time acquisition of operating status data after executing the circuit parameter configuration scheme, the operating status data including at least reactive power exchange data, harmonic data and AC bus voltage; The operational status data is archived to form a historical database; Based on the historical database, the simulation model of the high-voltage direct current transmission network is trained, and new versions of the circuit parameter configuration scheme are generated periodically.

6. A circuit parameter configuration system for eliminating low-resistance circuits in a high-voltage direct current transmission network, characterized in that, include: The acquisition module is used to acquire the forward conduction voltage drop data, DC data, harmonic data, and firing angle of the converter valve of the target high-voltage direct current transmission network; The analysis module is used to input the DC data of the target HVDC transmission network into the reactive power consumption relationship constructed by the forward conduction voltage drop data of the converter valve and the firing angle to obtain the minimum reactive power consumption; and to analyze and process the acquired harmonic data of the target HVDC transmission network to obtain the minimum filter capacity. The determination module is used to determine the inductive reactive power capacity of the target HVDC transmission network based on the minimum reactive power consumption and the minimum filter capacity; and to dynamically adjust the inductive reactive power capacity according to the triggering angle to obtain the initial circuit parameters. The processing module is used to introduce angle range conversion data, process the initial loop parameters, and obtain the loop parameter configuration scheme for canceling low reactive power in the target high voltage DC transmission network. The angle range conversion data is obtained by processing the minimum reactive power consumption and the DC power data in the DC data. The execution module is used to control the converter station in the target high-voltage direct current transmission network to execute the circuit parameter configuration scheme.

7. The high-voltage direct current transmission network circuit parameter configuration system for eliminating low-resistance circuits as described in claim 6, characterized in that, The process of analyzing and processing the acquired harmonic data of the target high-voltage direct current transmission network to obtain the minimum filter capacity includes: The harmonic data includes at least the harmonic spectrum, harmonic current flow, and harmonic amplitude. Harmonic power flow processing is performed on the harmonic spectrum, the harmonic power flow, and the harmonic amplitude to obtain a set of harmonic characteristic parameters; With the goal of minimizing the total filter capacity, the minimum filter capacity is obtained by iteratively processing the set of harmonic characteristic parameters using a filter optimization configuration algorithm.

8. The high-voltage direct current transmission network circuit parameter configuration system for eliminating low-resistance circuits as described in claim 6, characterized in that, The angle range conversion data is obtained by processing the minimum reactive power consumption and the DC power data in the DC data, including: The minimum reactive power consumption and the DC power data in the DC data are jointly analyzed and processed to obtain the power-reactive power characteristic curve. Based on linear fitting technology, the power-reactive characteristic curve is processed to obtain the angle range conversion data.

9. The high-voltage direct current transmission network circuit parameter configuration system for eliminating low-resistance circuits as described in claim 6, characterized in that, The process of processing the initial loop parameters to obtain the loop parameter configuration scheme for canceling the low-resistance circuit of the target HVDC transmission network includes: The initial loop parameters were processed using parameter optimization simulation technology to obtain multi-condition reactive power balance simulation results. The multi-condition reactive power balance simulation results are subjected to multi-objective constraint optimization to obtain the circuit parameter configuration scheme for canceling low reactive power in the target HVDC transmission network.

10. The high-voltage direct current transmission network circuit parameter configuration system for eliminating low-resistance circuits as described in claim 9, characterized in that, After controlling the converter stations in the target HVDC transmission network to execute the loop parameter configuration scheme, the HVDC transmission network's loop parameter configuration system for canceling low-resistance circuits further includes: Real-time acquisition of operating status data after executing the circuit parameter configuration scheme, the operating status data including at least reactive power exchange data, harmonic data and AC bus voltage; The operational status data is archived to form a historical database; Based on the historical database, the simulation model of the high-voltage direct current transmission network is trained, and new versions of the circuit parameter configuration scheme are generated periodically.

Images