Flexible ac traction power supply system fast cooperative control method for improving energy efficiency

Abstract

This application relates to the field of traction power supply technology, and in particular to a fast collaborative control method for a flexible AC traction power supply system to improve energy efficiency. The method includes: obtaining the traction power tolerance of the traction substation, the active power of the traction substation's lighting load, the phasor of the traction substation's output voltage, the traction power phasor of the traction substation, the equivalent impedance of the lines between traction substations, and the effective value of the rated voltage; then calculating the approximate natural traction power of the traction substation in the flexible AC traction power supply system; then calculating the optimized power of the flexible AC traction power supply system; and finally calculating the optimized voltage of the flexible AC traction power supply system, so as to generate collaborative control actions for the flexible AC traction power supply system based on the optimized voltage. This solves the problem that related technologies use heuristic algorithms, resulting in long calculation times and making them only suitable for applications with low real-time requirements, such as system planning, and unable to meet the real-time control needs of flexible AC traction power supply systems.

Description

Technical Field

[0001] This application relates to the field of traction power supply technology, and in particular to a fast coordinated control method for a flexible AC traction power supply system that improves energy efficiency. Background Technology

[0002] Flexible AC traction power supply systems based on SPC (Static Power Converter) can effectively solve harmonic and imbalance problems on the grid side and improve power supply capacity and energy utilization on the contact network side, showing broad development prospects. Optimal power flow calculation, as an important technology for energy scheduling and load regulation of flexible AC traction power supply systems, determines the system's energy efficiency level.

[0003] Among related technologies, for optimal power flow calculation, some use heuristic algorithms to obtain the optimal solution of the system power flow; others construct optimization models to solve the problem by acquiring and predicting locomotive information; and still others use an approximate optimal power flow calculation method for flexible DC traction power supply systems.

[0004] However, the related technologies use heuristic algorithms, which take a long time to compute. This means they are only suitable for applications with low real-time requirements, such as system planning, and cannot meet the real-time control needs of flexible AC traction power supply systems. This issue urgently needs to be addressed. Summary of the Invention

[0005] This application provides a fast collaborative control method for flexible AC traction power supply systems to improve energy efficiency, thereby solving the problem that related technologies use heuristic algorithms, which have long calculation times and are only suitable for occasions with low real-time requirements such as system planning, and cannot meet the real-time control requirements of flexible AC traction power supply systems.

[0006] The first aspect of this application provides a rapid collaborative control method for a flexible AC traction power supply system to improve energy efficiency, comprising the following steps: obtaining the traction power tolerance of the traction substation, the active power of the traction substation's lighting load, the traction substation output voltage phasor, the traction power phasor of the traction substation, the equivalent impedance of the line between the traction substations, and the effective value of the rated voltage of the flexible AC traction power supply system; calculating the approximate natural traction power of the traction substation of the flexible AC traction power supply system based on the traction substation output voltage phasor, the traction power phasor of the traction substation, and the equivalent impedance of the line between the traction substations; calculating the optimized power of the flexible AC traction power supply system based on the approximate natural traction power of the traction substation, the traction power tolerance of the traction substation, and the active power of the lighting load of the traction substation, and calculating the optimized voltage of the flexible AC traction power supply system according to the optimized power, the approximate natural traction power of the traction substation, and the effective value of the rated voltage, so as to generate a collaborative control action of the flexible AC traction power supply system based on the optimized voltage.

[0007] Based on the above technical means, the embodiments of this application calculate the approximate natural traction power, optimized power, and optimized voltage of the traction substation in sequence, and generate the coordinated control action of the flexible AC traction power supply system according to the optimized voltage. Without the need for complex iterative simulation calculations, it can quickly complete the layer-by-layer analytical solution of power and voltage, effectively adapt to the real-time control requirements of the flexible AC traction power supply system, and realize the reasonable allocation of power and coordinated voltage regulation of each traction substation, avoid power over-limit and abnormal voltage fluctuations, and improve the operational stability and power supply efficiency of the entire traction power supply system.

[0008] Optionally, in one embodiment of this application, the formula for calculating the approximate natural traction power of the traction unit may be, but is not limited to, the following: , in, This is the approximate natural traction power of the first traction unit. For the first The traction power approximates the natural traction power. For the first The traction power approximates the natural traction power. The traction power phasor of the first traction unit. This is the output voltage phasor of the first traction station. This is the output voltage phasor of the second traction station. The equivalent impedance of the line between the first and second traction substations is given. For the first The traction power phasor of each traction unit. For the first The output voltage phasor of the traction station For the first +1 traction substation output voltage phasor For the first The first traction station and the first +1 equivalent impedance of the line between traction substations For the first -1 traction substation output voltage phasor For the first -1 traction station and the first Equivalent impedance of the line between each traction substation For the first The traction power phasor of each traction unit. For the first The output voltage phasor of each traction station For the first -1 traction substation output voltage phasor For the first -1 traction station and the first Equivalent impedance of the line between each traction substation This represents the total number of traction stations.

[0009] Based on the above technical means, the embodiments of this application, based on the output voltage phasor of the traction substation, the traction power phasor of the traction substation, and the equivalent impedance of the lines between the traction substations, utilize a segmented calculation formula to quickly calculate the output power phasor of each traction substation in the flexible AC traction power supply system when the voltage phase of each traction substation is the same and the effective voltage value is the rated effective voltage value. This approach balances calculation accuracy and real-time performance, adapting to the real-time control requirements of the flexible AC traction power supply system.

[0010] Optionally, in one embodiment of this application, calculating the optimized power of the flexible AC traction power supply system based on the approximate natural traction power of the traction substation, the traction power tolerance of the traction substation, and the active power of the lighting load of the traction substation includes: calculating a first power of the flexible AC traction power supply system based on the approximate natural traction power of the traction substation; calculating a second power of the flexible AC traction power supply system based on the traction power tolerance of the traction substation; in response to the first power being less than or equal to the second power, obtaining the total active power of the lighting load contained in the traction substation according to the active power of the lighting load of the traction substation; and classifying the traction substation into a first type of traction substation, a second type of traction substation, a third type of traction substation, and a fourth type of traction substation based on the total active power of the lighting load contained in the traction substation, the amplitude of the approximate natural traction power of the traction substation, and the traction power tolerance of the traction substation, in order to calculate the optimized power.

[0011] Based on the above technical means, the embodiments of this application can perform capacity safety judgment at the system level by calculating the first power and the second power. Then, when the first power is less than or equal to the second power, that is, within the safety tolerance, the traction substations are divided into first-class traction substations, second-class traction substations, third-class traction substations, and fourth-class traction substations. This facilitates the accurate differentiation of the power consumption or generation, overload or non-overload operation status of different traction substations, and provides a logical basis for subsequent calculation of the sum of active power transferred to external sources.

[0012] Optionally, in one embodiment of this application, calculating the optimized power of the flexible AC traction power supply system based on the approximate natural traction power of the traction substation, the traction power tolerance of the traction substation, and the active power of the lighting load of the traction substation includes: calculating the third power of the flexible AC traction power supply system based on the total active power of the lighting load contained in the traction substation; calculating the sum of the externally transferred active power of the first type of traction substation, the third type of traction substation, and the fourth type of traction substation in response to the third power being greater than or equal to zero; calculating the sum of the externally transferred active power of the first type of traction substation, the second type of traction substation, and the fourth type of traction substation in response to the third power being less than zero; calculating the traction substation corrected active power of the flexible AC traction power supply system based on the sum of the externally transferred active power; and calculating the optimized power based on the traction substation corrected active power.

[0013] Based on the above technical means, the embodiments of this application can define the positive and negative operating conditions of the total active power of the system by calculating the third power. This facilitates the selection of traction substation types participating in power transfer regulation according to the differences in different operating conditions, and classifies and statistically analyzes the sum of active power transferred by the system to the outside. Then, the corrected active power is solved and the optimized power is calculated, which is conducive to achieving balanced distribution of active power and improving the load balance and operating efficiency of the active power allocation of the flexible AC traction power supply system.

[0014] Optionally, in one embodiment of this application, the step of calculating the optimized voltage of the flexible AC traction power supply system based on the optimized power, the approximate natural traction power of the traction station, and the effective value of the rated voltage includes: determining the starting traction station of the flexible AC traction power supply system; determining the preliminary optimized voltage of the starting traction station based on the effective value of the rated voltage; calculating the preliminary optimized voltage of the traction station satisfying a first preset direction based on the preliminary optimized voltage of the starting traction station, the optimized power, and the approximate natural traction power of the traction station; calculating the preliminary optimized voltage of the traction station satisfying a second preset direction based on the preliminary optimized voltage of the starting traction station, the optimized power, and the approximate natural traction power of the traction station; determining the boundary conditions of the preliminary optimized voltage; if the boundary conditions are non-boundary, generating the optimized voltage based on the preliminary optimized voltage; if the boundary conditions are unilateral boundary conditions, determining an updated starting traction station satisfying preset screening conditions based on the preliminary optimized voltage, so as to generate the optimized voltage based on the updated starting traction station.

[0015] Based on the above technical means, the embodiments of this application first select the starting traction substation for recursive calculation, set the preliminary optimized voltage of the starting traction substation, and then use the preliminary optimized voltage as a reference to recursively solve the preliminary optimized voltage of the remaining traction substations along the entire line in two preset directions. Finally, the system optimized voltage is generated based on all the preliminary optimized voltages. This eliminates the need for complex iterative calculations, which is conducive to quickly calculating the effective value and phase of the optimized voltage of each traction substation. This provides a reliable basis for the voltage collaborative control of the traction power supply system and enhances the real-time performance of collaborative control.

[0016] A second aspect of this application provides a fast collaborative control device for a flexible AC traction power supply system to improve energy efficiency, comprising: an acquisition module for acquiring the traction power tolerance of the traction substation, the active power of the traction substation's lighting load, the traction substation output voltage phasor, the traction power phasor of the traction substation, the equivalent impedance of the line between the traction substations, and the effective value of the rated voltage of the flexible AC traction power supply system; a calculation module for calculating the approximate natural traction power of the traction substation of the flexible AC traction power supply system based on the traction substation output voltage phasor, the traction power phasor of the traction substation, and the equivalent impedance of the line between the traction substations; and a control module for calculating the optimized power of the flexible AC traction power supply system based on the approximate natural traction power of the traction substation, the traction power tolerance of the traction substation, and the active power of the traction substation's lighting load, and calculating the optimized voltage of the flexible AC traction power supply system according to the optimized power, the approximate natural traction power of the traction substation, and the effective value of the rated voltage, so as to generate a collaborative control action of the flexible AC traction power supply system based on the optimized voltage.

[0017] Based on the above technical means, the embodiments of this application calculate the approximate natural traction power, optimized power, and optimized voltage of the traction substation in sequence, and generate the coordinated control action of the flexible AC traction power supply system according to the optimized voltage. Without the need for complex iterative simulation calculations, it can quickly complete the layer-by-layer analytical solution of power and voltage, effectively adapt to the real-time control requirements of the flexible AC traction power supply system, and realize the reasonable allocation of power and coordinated voltage regulation of each traction substation, avoid power over-limit and abnormal voltage fluctuations, and improve the operational stability and power supply efficiency of the entire traction power supply system.

[0018] Optionally, in one embodiment of this application, the control module includes: a first calculation unit, configured to calculate a first power of the flexible AC traction power supply system based on the approximate natural traction power of the traction substation; a second calculation unit, configured to calculate a second power of the flexible AC traction power supply system based on the traction power tolerance of the traction substation; an acquisition unit, configured to acquire the total active power of the lighting load contained in the traction substation based on the active power of the lighting load of the traction substation in response to the first power being less than or equal to the second power; and a division unit, configured to divide the traction substation into a first type of traction substation, a second type of traction substation, a third type of traction substation, and a fourth type of traction substation based on the total active power of the lighting load contained in the traction substation, the amplitude of the approximate natural traction power of the traction substation, and the traction power tolerance of the traction substation, in order to calculate the optimized power.

[0019] Based on the above technical means, the embodiments of this application, based on the output voltage phasor of the traction substation, the traction power phasor of the traction substation, and the equivalent impedance of the lines between the traction substations, utilize a segmented calculation formula to quickly calculate the output power phasor of each traction substation in the flexible AC traction power supply system when the voltage phase of each traction substation is the same and the effective voltage value is the rated effective voltage value. This approach balances calculation accuracy and real-time performance, adapting to the real-time control requirements of the flexible AC traction power supply system.

[0020] A third aspect of this application provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the program to implement the energy-efficient flexible AC traction power supply system rapid coordinated control method as described in the above embodiments.

[0021] A fourth aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described method for rapid coordinated control of a flexible AC traction power supply system with improved energy efficiency.

[0022] A fifth aspect of this application provides a computer program product, including a computer program that, when executed, implements the above-described method for rapid coordinated control of a flexible AC traction power supply system to improve energy efficiency.

[0023] This application's embodiment calculates the approximate natural traction power, optimized power, and optimized voltage of the traction substation sequentially. Based on the optimized voltage, it generates rapid coordinated control actions for the flexible AC traction power supply system to improve energy efficiency. This eliminates the need for complex iterative simulation calculations, enabling rapid layer-by-layer analytical solutions for power and voltage. It effectively adapts to the real-time control requirements of flexible AC traction power supply systems, while simultaneously achieving reasonable power allocation and coordinated voltage regulation among traction substations. This avoids power over-limits and abnormal voltage fluctuations, improving the operational stability and power supply efficiency of the entire traction power supply system. Therefore, it solves the problem that related technologies use heuristic algorithms, resulting in long computation times and limiting their application to low-real-time requirements such as system planning, thus failing to meet the real-time control needs of flexible AC traction power supply systems.

[0024] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0025] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a flowchart illustrating a rapid coordinated control method for an energy-efficient flexible AC traction power supply system according to an embodiment of this application. Figure 2 This is a schematic diagram of an approximate power flow calculation model provided according to an embodiment of this application; Figure 3 This is a flowchart of an active power coordination algorithm provided according to an embodiment of this application; Figure 4 This is a flowchart of a port voltage analysis method according to an embodiment of this application; Figure 5 This is a block diagram of a fast collaborative control device for an energy-efficient flexible AC traction power supply system provided according to an embodiment of this application; Figure 6 This is a schematic diagram of the structure of an electronic device provided according to an embodiment of this application.

[0026] Figure label: 50 - Rapid collaborative control device for flexible AC traction power supply system to improve energy efficiency; 100 - Acquisition module, 200 - Calculation module, 300 - Control module; 601 - Memory, 602 - Processor, 603 - Communication interface. Detailed Implementation

[0027] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0028] Based on the aforementioned background technology, besides the insufficient real-time control of heuristic algorithms, the method of acquiring locomotive information and constructing an optimization model based on predicted data has high communication requirements, necessitating the real-time acquisition of massive amounts of locomotive information. Furthermore, the optimization model is susceptible to interference from predicted data deviations, resulting in insufficient control stability. The approximate optimal power flow calculation method only provides a solution for voltage optimization in flexible DC traction power supply systems and does not support flexible AC traction power supply systems, making it difficult to meet the coordinated control requirements of voltage RMS value and phase in flexible AC traction power supply systems.

[0029] To address the aforementioned issues, this application proposes a rapid coordinated control method for a flexible AC traction power supply system that improves energy efficiency.

[0030] Before introducing the energy-efficient flexible AC traction power supply system rapid coordinated control method according to the embodiments of this application, a brief introduction to the flexible AC traction power supply system is given, taking a fully continuous flexible AC traction power supply system as an example. The number of traction stations in this system is... , The load distribution of locomotives across the entire line at any given time is as follows Record this moment in the system The output voltage phasor of the traction station , ,in, For the first The effective value of the output voltage of each traction station For the first The output voltage phase of each traction station. Record the system at that moment. Traction power phasor of each traction station , ,in, For the first The active power pulled by each traction unit For the first The reactive power traction of each traction unit. Phasor frequency. The initial phase is referenced by the satellite synchronization signal. , and These are the system's rated voltage RMS value, maximum allowable RMS value, and minimum allowable RMS value, respectively. (Note: The original text contains some formatting errors and inconsistencies. A more accurate translation would require the full context.) For the active power of each traction load in the system, This represents the traction power tolerance of each traction unit in the system. (Note: The original text contains some inconsistencies and For the first The first traction station and the first +1 equivalent impedance of the line between traction substations , ,in, For the first The first traction station and the first +1 equivalent impedance amplitude of the line between traction substations For the first The first traction station and the first +1 equivalent impedance phase angle between traction substations.

[0031] The following describes a rapid coordinated control method for an energy-efficient flexible AC traction power supply system according to embodiments of this application, with reference to the accompanying drawings.

[0032] Figure 1 This is a flowchart of a fast coordinated control method for a flexible AC traction power supply system that improves energy efficiency, according to an embodiment of this application.

[0033] like Figure 1 As shown, the rapid coordinated control method for the energy-efficient flexible AC traction power supply system includes the following steps: In step S101, the following parameters are obtained for the flexible AC traction power supply system: traction power tolerance of the traction substation, active power of the traction substation's lighting load, phasor of the traction substation's output voltage, phasor of the traction power of the traction substation, equivalent impedance of the line between the traction substations, and effective value of the rated voltage.

[0034] In actual implementation, this application embodiment obtains the current operating data of the flexible AC traction power supply system. The operating data may include, but is not limited to, the traction power tolerance of the traction station. traction-driven active power of load traction station output voltage phasor Traction power phasor Equivalent impedance of the line between traction substations Rated voltage RMS value .

[0035] It should be noted that, for the fully continuous flexible AC traction power supply system, the embodiments of this application regard each traction station as an AC node with controllable effective voltage value and voltage phase angle, and the contact network between adjacent traction stations is equivalent to an impedance. This equivalent impedance is equal to the parallel impedance of the up and down contact networks of the line segment, so as to form a chain structure.

[0036] In some cases, the traction power tolerance of the traction station It can be obtained by multiplying the upper limit of the traction substation current by the traction substation output voltage. The traction substation output voltage can be obtained by methods including but not limited to real-time measurement and reading of the traction substation command voltage.

[0037] In step S102, the approximate natural traction power of the traction substation in the flexible AC traction power supply system is calculated based on the traction substation output voltage phasor, the traction substation traction power phasor, and the equivalent impedance of the lines between traction substations.

[0038] In actual implementation, the embodiments of this application adopt an approximate power flow algorithm based on the output voltage phasor of the traction substation. Traction power phasor Equivalent impedance of the line between traction substations Calculate the approximate natural traction power of the traction unit. .

[0039] It should be noted that the approximate natural traction power This refers to the distribution of locomotive load across the entire line. Unchanged, flexible AC traction power supply system The voltage phases of all traction substations are the same, and the effective voltage values ​​are all the rated effective voltage values ​​(i.e., Under the condition of ), the output power phasor of each traction station is denoted as ,in, To approximate the active power of natural traction, This approximates the natural traction reactive power. Here, "approximate" means treating the traction substation and overhead contact line load as equivalent concentrated loads at the substation outlet, and neglecting the difference between system network losses and actual network losses under natural power conditions.

[0040] It will be understood from the description of other embodiments that, as Figure 2 As shown, to facilitate understanding of the approximate power flow algorithm, this application embodiment establishes an approximate power flow calculation model. In this model, each traction substation is considered as an AC node with controllable effective voltage value and voltage phase angle, and the contact network between adjacent traction substations is considered as an equivalent impedance. The output voltage phasor of the traction substation is denoted as... The equivalent impedance is The traction power phasor is The approximate natural traction power to be solved is .

[0041] Therefore, in one embodiment of this application, the formula for calculating the approximate natural traction power of each traction unit can be, but is not limited to, the following: , in, This is the approximate natural traction power of the first traction unit. For the first The traction power approximates the natural traction power. For the first The traction power approximates the natural traction power. The traction power phasor of the first traction unit. This is the output voltage phasor of the first traction station. This is the output voltage phasor of the second traction station. The equivalent impedance of the line between the first and second traction substations is given. For the first The traction power phasor of each traction unit. For the first The output voltage phasor of each traction station For the first +1 traction substation output voltage phasor For the first The first traction station and the first +1 equivalent impedance of the line between traction substations For the first -1 traction substation output voltage phasor For the first -1 traction station and the first Equivalent impedance of the line between each traction substation For the first The traction power phasor of each traction unit. For the first The output voltage phasor of each traction station For the first -1 traction substation output voltage phasor For the first -1 traction station and the first Equivalent impedance of the line between each traction substation This represents the total number of traction stations.

[0042] It is understood that, after establishing an approximate power flow calculation model, this application embodiment constructs calculation formulas for the approximate natural traction power of traction substations based on Kirchhoff's power balance principle, according to the positions of the head, middle, and tail traction substations. Specifically, for the head traction substation, the calculation logic is to subtract the power phasor flowing out to the next line segment from the head traction substation's traction power phasor to obtain the approximate natural traction power of the head traction substation; for the middle traction substation, the calculation logic is to subtract the power phasor flowing out to the next line segment from the middle traction substation's traction power phasor, and add the power phasor flowing in from the line segment to obtain the approximate natural traction power of the middle traction substation; for the tail traction substation, the calculation logic is to add the power phasor flowing in from the line segment to the tail traction substation's traction power phasor to obtain the approximate natural traction power of the tail traction substation.

[0043] Based on the output voltage phasor of the traction substation, the traction power phasor of the traction substation, and the equivalent impedance of the lines between the traction substations, this embodiment of the application uses a segmented calculation formula to quickly calculate the output power phasor of each traction substation in a flexible AC traction power supply system when the voltage phase of each traction substation is the same and the effective voltage value is the rated effective voltage value. It takes into account both calculation accuracy and real-time performance, and adapts to the real-time control requirements of the flexible AC traction power supply system.

[0044] In step S103, the optimized power of the flexible AC traction power supply system is calculated based on the approximate natural traction power of the traction substation, the traction power tolerance of the traction substation, and the active power of the traction substation's lighting load. The optimized voltage of the flexible AC traction power supply system is then calculated based on the optimized power, the approximate natural traction power of the traction substation, and the effective value of the rated voltage. The coordinated control action of the flexible AC traction power supply system is then generated based on the optimized voltage.

[0045] The following details how embodiments of this application calculate the optimized power of a flexible AC traction power supply system based on the approximate natural traction power of the traction substation, the traction power tolerance of the traction substation, and the active power of the traction substation's lighting load.

[0046] Specifically, in one embodiment of this application, the optimized power of the flexible AC traction power supply system is calculated based on the approximate natural traction power of the traction substation, the traction power tolerance of the traction substation, and the active power of the lighting load of the traction substation. This includes: calculating the first power of the flexible AC traction power supply system based on the approximate natural traction power of the traction substation; calculating the second power of the flexible AC traction power supply system based on the traction power tolerance of the traction substation; in response to the first power being less than or equal to the second power, obtaining the total active power of the lighting load contained in the traction substation based on the active power of the lighting load of the traction substation; and classifying the traction substation into a first type of traction substation, a second type of traction substation, a third type of traction substation, and a fourth type of traction substation based on the total active power of the lighting load contained in the traction substation, the amplitude of the approximate natural traction power of the traction substation, and the traction power tolerance of the traction substation, in order to calculate the optimized power.

[0047] In actual implementation, the embodiments of this application employ an active power coordination algorithm based on approximate natural traction power. Traction power tolerance traction-driven active power of load The optimal power of the system is calculated. It should be noted that the technical characteristic of the active power coordination algorithm is that it approximates the natural power... Based on this, the optimized power of the system is obtained by quickly calculating the transfer of active power between each traction station. .

[0048] by Figure 3 Taking an example, this illustrates the principle of the active power coordination algorithm.

[0049] S301, calculate the first power and the second power.

[0050] Among them, the embodiments of this application are for The traction unit's approximate natural traction active power Summing and taking the absolute value generates the first power. At the same time, Traction power tolerance of each traction station squared, minus The traction unit approximates the natural traction reactive power. After squaring, the difference is obtained, and the arithmetic square root of the difference is taken to generate the second power. .

[0051] S302, determine whether the first power is less than or equal to the second power.

[0052] In this application embodiment, the determination is as follows: At that time, enter S303; determine At that time, enter S304.

[0053] S303, exiting the collaborative computing process, reporting an overcapacity warning.

[0054] S304 classifies traction substations into four categories based on the total active power of the dynamic load contained in the traction substation, the amplitude of the approximate natural traction power of the traction substation, and the traction power tolerance of the traction substation.

[0055] In this embodiment of the application, the total active power of the dynamic lighting load contained in each traction is recorded. Let the approximate natural traction power amplitude be denoted. And based on the approximate natural power amplitude Traction power tolerance The size relationship, the total active power of the traction load. The relationship between the magnitude of 0 and 0 divides the entire traction system into four categories: satisfy and The first type of traction substation (electrical, overload); satisfy and The second type of traction substation (electrically powered, not overloaded) further specifies that, in the second type of traction substation: it meets the following requirements. The first type is denoted as the second type (0); satisfying the condition... The first type is denoted as the second type (>0); satisfying the condition... The type is denoted as the second class (T); satisfy and The third type of traction substation (power generation, no overload) further specifies that, in the third type of traction substation: it meets the following requirements: The third type (T) is denoted as the third type. satisfy and It is classified as a Class IV traction substation (power generation, overload).

[0056] This application embodiment calculates the first power and the second power, enabling capacity safety judgment at the system level. Then, when the first power is less than or equal to the second power, i.e. within the safety tolerance, the traction substation is divided into first-class traction substation, second-class traction substation, third-class traction substation, and fourth-class traction substation. This facilitates accurate differentiation of the power consumption or generation, overload or non-overload operating states of different traction substations, providing a logical basis for subsequent calculation of the sum of active power transferred to external systems.

[0057] Furthermore, in one embodiment of this application, the optimized power of the flexible AC traction power supply system is calculated based on the approximate natural traction power of the traction substation, the traction power tolerance of the traction substation, and the active power of the lighting load of the traction substation. This includes: calculating the third power of the flexible AC traction power supply system based on the total active power of the lighting load contained in the traction substation; calculating the sum of the externally transferred active power of the first type of traction substation, the third type of traction substation, and the fourth type of traction substation in response to the third power being greater than or equal to zero; calculating the sum of the externally transferred active power of the first type of traction substation, the second type of traction substation, and the fourth type of traction substation in response to the third power being less than zero; calculating the traction substation corrected active power of the flexible AC traction power supply system based on the sum of the externally transferred active power; and calculating the optimized power based on the traction substation corrected active power.

[0058] Continue with Figure 3 Taking an example, this illustrates the principle of the active power coordination algorithm.

[0059] S305, calculate the third power.

[0060] In this application, the embodiments are recorded as follows: For the first The active power transferred to external traction stations For the first The active power transferred by each traction station Previous active power For the first The active power transferred by each traction station The subsequent active power satisfies the following relationship: In addition, remember For the first The active power transferred by each traction station The subsequent apparent power satisfies the following relationship: And thus to The total active power of the dynamic lighting load contained in each traction unit Summing to generate the third power .

[0061] S306, determine whether the third power is greater than or equal to 0.

[0062] In this application embodiment, the determination is as follows: When this happens, execute S307; determine... At that time, S308 is executed.

[0063] S307, convert all Class I traction substations to Class II (T) traction substations, and convert all Class III and Class IV traction substations to Class II (0) traction substations, and calculate the sum of the external active power transferred by Class I, Class III, and Class IV traction substations.

[0064] In this embodiment of the application, when it is determined that a first-class traction substation exists, all first-class traction substations are converted into second-class (T) traction substations. Thus, each first-class traction substation transfers active power externally. Satisfying the relation When it is determined that there are Class III and Class IV traction substations, all Class III and Class IV traction substations will be converted to Class II (0) traction substations. As a result, each Class III and Class IV traction substation will transfer active power to external locations. Satisfying the relation When a Class II traction substation is determined to exist, the active power transferred externally by the Class II traction substation is recorded as follows: ; and then record The sum of active power transferred to external sources by all traction units of categories I, III, and IV satisfies the following relationship: .

[0065] S308, convert all Class I and Class II (>0) traction substations to Class II (0) traction substations, and convert all Class IV traction substations to Class III (T) traction substations, and calculate the sum of the external active power transferred by Class I, Class II, and Class IV traction substations.

[0066] In this embodiment of the application, when it is determined that there are Class I and Class II (>0) traction substations, all Class I and Class II (>0) traction substations are converted into Class II (0) traction substations. Thus, each Class I and Class II traction substation transfers active power externally. Satisfying the relation When a Class IV traction substation is determined to exist, all Class IV traction substations will be converted to Class III (T) traction substations. Consequently, each Class IV traction substation will transfer active power externally. Satisfying the relation When a third-class traction substation is determined to exist, the active power transferred externally by the third-class traction substation is recorded as follows: ; and then record The sum of active power transferred to external sources by all traction units of categories I, II, and IV satisfies the following relationship: .

[0067] S309, Calculate the corrected active power of the traction power supply system for the flexible AC traction power supply system based on the sum of the active power transferred to external systems.

[0068] In this application, the embodiments are recorded as follows: For the first The corrected active power of each traction station is based on the sum of the active power transferred externally. and third power Determine the range of values ​​for the corrected active power. The expression for this range can be, but is not limited to, as follows: (1) in, For the first Corrected active power of each traction unit For the first Each traction unit's traction power tolerance. For the first The traction unit approximates the natural traction reactive power. For the first The active power transferred by each traction station Subsequent active power, The sum of active power transferred outwards. For the first The total active power of the traction load. For the first The active power of the traction load.

[0069] In addition, the active power is modified to satisfy the power balance constraint, and the expression of this constraint can be, but is not limited to, as follows: (2) in, For the first Corrected active power of each traction unit This represents the sum of active power transferred outwards. It is understandable that... The sum of the corrected active power of each traction unit can offset the sum of the active power transferred to other units, thus ensuring power balance.

[0070] Based on the above constraints, the embodiments of this application can obtain Here, we present a method for finding a particular solution. The specific method is as follows: This application's embodiments determine hour, The calculation formula can be, but is not limited to, the following: (3) in, For the first Corrected active power of each traction unit The sum of active power transferred outwards. For the first Each traction unit's traction power tolerance. For the first The traction unit approximates the natural traction reactive power. For the first The active power transferred by each traction station Subsequent active power, For the first Each traction unit's traction power tolerance. For the first The traction unit approximates the natural traction reactive power. For the first The active power after the active power transferred by the traction unit. This is a temporary sequence number index for the traction substation. It should be noted that... Used with Distinguishing, for example, in calculating the first = When the active power of the three traction substations is corrected, at this time For fixed values, For changing values, iterate through 1 to... All traction stations.

[0071] This application's embodiments determine hour, The calculation formula can be, but is not limited to, the following: (4) in, For the first Corrected active power of each traction unit The sum of active power transferred outwards. For the first The active power transferred by each traction station Subsequent active power, For the first The active power after the active power transferred by the traction unit. This is a temporary sequence number index for the traction station.

[0072] S310, based on the corrected active power of the traction unit, calculates the optimized power.

[0073] In this application, the embodiments are recorded as follows: The optimized power for a flexible AC traction power supply system can be calculated using, but is not limited to, the following formula: (5) in, To optimize the power of the flexible AC traction power supply system For the first The active power transferred by each traction station Subsequent active power, For the first Corrected active power of each traction unit For the first The traction unit approximates the natural traction reactive power.

[0074] This application embodiment can define two operating conditions, positive and negative, of the total active power of the system by calculating the third power. This facilitates the selection of traction substation types participating in power transfer regulation based on the differences in different operating conditions, and classifies and statistically analyzes the sum of active power transferred by the system to the outside. Then, it solves for the corrected active power and calculates the optimized power, which is conducive to achieving balanced distribution of active power and improving the load balance and operating efficiency of the active power allocation of the flexible AC traction power supply system.

[0075] The following details how embodiments of this application calculate the optimized voltage of the flexible AC traction power supply system based on the optimized power, the approximate natural traction power of the traction unit, and the effective value of the rated voltage, so as to generate the coordinated control action of the flexible AC traction power supply system based on the optimized voltage.

[0076] Specifically, in one embodiment of this application, calculating the optimized voltage of the flexible AC traction power supply system based on the optimized power, the approximate natural traction power of the traction station, and the effective value of the rated voltage includes: determining the starting traction station of the flexible AC traction power supply system; determining the preliminary optimized voltage of the starting traction station based on the effective value of the rated voltage; calculating the preliminary optimized voltage of the traction station satisfying a first preset direction based on the preliminary optimized voltage, optimized power, and approximate natural traction power of the starting traction station; calculating the preliminary optimized voltage of the traction station satisfying a second preset direction based on the preliminary optimized voltage, optimized power, and approximate natural traction power of the starting traction station; determining the boundary conditions of the preliminary optimized voltage; if the boundary condition is no boundary condition, generating the optimized voltage based on the preliminary optimized voltage; if the boundary condition is a unilateral boundary condition, determining the updated starting traction station satisfying the preset screening conditions based on the preliminary optimized voltage, so as to generate the optimized voltage based on the updated starting traction station.

[0077] In actual implementation, the embodiments of this application adopt the port voltage analysis method, based on the optimized power of the flexible AC traction power supply system. Approximate natural traction power Rated voltage RMS value Calculate the optimal voltage for a flexible AC traction power supply system .

[0078] This application's embodiment records the initial optimized voltage of the system. , ,in, To initially optimize the effective voltage value, To initially optimize the voltage phase, let the optimized voltage of the system be denoted as... , ,in, To optimize the effective voltage value, To optimize voltage phase.

[0079] by Figure 4 Taking this as an example, we can illustrate the principle of the port voltage analysis method.

[0080] S401, determine the starting traction station of the flexible AC traction power supply system, and determine the preliminary optimized voltage of the starting traction station.

[0081] In this application embodiment, the first one is selected. One traction substation is selected as the starting traction substation, and the preliminary optimized voltage of the starting traction substation is determined as follows: , ,in, .

[0082] S402, based on the initial optimized voltage of the starting traction substation, calculate the initial optimized voltage of the traction substation located to the right of the starting traction substation.

[0083] In this application, the embodiment is referred to as the first Preliminary optimized voltage of each traction substation Based on this, calculate the number of adjacent right neighbors. Preliminary optimized voltage for +1 traction substation . No. +1 traction substation's preliminary optimized voltage RMS value Preliminary optimization of voltage phase The calculation formula can be, but is not limited to, the following: (6) in, For the first +1 preliminary optimized voltage RMS value for traction substations, For the first Preliminary optimized effective voltage value for a traction substation. For the first Optimized power of each traction unit For the first The approximate natural traction power of a traction unit For the first The first traction station and the first +1 equivalent impedance amplitude of the line between traction substations For the first Optimized active power of each traction substation For the first The approximate natural traction active power of a traction station For the first The first traction station and the first +1 equivalent impedance phase angle between traction substations For the first Optimized reactive power of each traction substation For the first The approximate natural traction reactive power of a traction substation For the first Preliminary optimized voltage phase for +1 traction substation For the first Preliminary optimization of voltage phase for each traction station.

[0084] It is understood that the embodiments of this application are based on the already obtained first... Preliminary optimized voltage for +1 traction substation As the new benchmark, calculate the number of adjacent right neighbors. Preliminary voltage optimization for +2 traction substations Following this rule and order, the calculation continues until all lines located at the starting position are obtained. The right side of the first traction station Preliminary optimized voltage of each traction substation .

[0085] S403, based on the initial optimized voltage of the starting traction substation, calculate the initial optimized voltage of the traction substation located to the left of the starting traction substation.

[0086] In this application, the embodiment is referred to as the first Preliminary optimized voltage of each traction substation Based on this, calculate the number of adjacent nodes to its left. -1 traction substation's preliminary optimized voltage . No. -1 preliminary optimized voltage RMS value of traction substation Preliminary optimization of voltage phase The calculation formula can be, but is not limited to, the following: (7) in, For the first -1 preliminary optimized voltage RMS value for a traction substation. For the first Preliminary optimized effective voltage value for a traction substation. For the first Optimized power of each traction unit For the first The approximate natural traction power of a traction unit For the first - 1 traction station and the first Equivalent impedance amplitude of the line between each traction substation For the first Optimized active power of each traction substation For the first The approximate natural traction active power of a traction station For the first - 1 traction station and the first The equivalent impedance phase angle between the lines of each traction substation For the first Optimized reactive power of each traction substation For the first The approximate natural traction reactive power of a traction substation For the first - Preliminary optimization of voltage phase for one traction substation For the first Preliminary optimization of voltage phase for each traction station.

[0087] It is understood that the embodiments of this application are based on the already obtained first... -1 traction substation's preliminary optimized voltage As the new benchmark, calculate the number of its left adjacent [number]. -Preliminary voltage optimization for 2 traction substations Following this rule and order, the calculation continues until all lines located at the starting position are obtained. The left side of the first traction station Preliminary optimized voltage of each traction substation .

[0088] S404 determines whether the preliminary optimization voltage exceeds the limit.

[0089] In this embodiment of the application, the preliminary optimized voltage effective value of each traction station is determined. Relative to the system voltage allowable range The out-of-bounds situation is divided into three categories: when the preliminary optimized voltage effective value of each traction station simultaneously exceeds the upper and lower limits of the voltage allowable range (i.e., the preliminary optimized voltage effective value of some traction stations is higher than the upper limit of the voltage allowable range). The initial optimized voltage RMS value of some traction substations is lower than the lower limit of the allowable voltage range. When the boundary crossing situation is classified as a bilateral boundary crossing, S405 is executed; when the preliminary optimized voltage effective values ​​of each traction substation are all within the voltage allowable range... If the condition is within the specified range, the out-of-bounds situation is classified as "no out-of-bounds" and S406 is executed; if the effective value of the preliminary optimized voltage of each traction substation simultaneously exceeds the upper limit of the voltage allowable range, or if the effective value of the preliminary optimized voltage of each traction substation simultaneously exceeds the lower limit of the voltage allowable range (i.e., the effective value of the preliminary optimized voltage of each traction substation is lower than the lower limit of the voltage allowable range), then... Or the initial optimized effective voltage value of each traction substation is higher than the upper limit of the allowable voltage range. When the boundary condition is determined to be a one-sided boundary violation, S407 is executed.

[0090] S405, exit collaborative optimization and switch to backup control strategy, which includes, but is not limited to, constant voltage limit control and droop control strategy.

[0091] S406 directly uses the preliminary optimized voltage of each traction station as the optimized voltage.

[0092] In this embodiment of the application, the optimized voltage is denoted as... .

[0093] S407, determine the updated starting traction station, and calculate the optimized voltage based on the updated starting traction station.

[0094] In this embodiment, the traction substation with the largest deviation from the allowable voltage range in the initial optimized voltage effective value is selected from all traction substations, and this substation is determined as the update starting traction substation that meets the preset screening conditions. This embodiment also demonstrates a method for obtaining the update starting traction substation, wherein the formula for calculating the update starting traction substation index can be, but is not limited to, the following: (8) in, To update the index of the initial traction. This is the lower limit of the allowable voltage range. For the first Preliminary optimized effective voltage value for a traction substation. This is the upper limit of the allowable voltage range. The index is used to determine the traction index that deviates the maximum from the allowable voltage range in the initial optimized effective voltage value.

[0095] Furthermore, the embodiments of this application will update the optimized effective voltage value of the starting traction station. Setting the upper or lower limit will update the optimized voltage phase of the starting traction station. Set as the initial optimized phase already obtained The expression for updating the optimized voltage RMS value of the starting traction substation can be, but is not limited to, the following: (9) in, To update the optimized effective voltage value of the starting traction substation, This is the lower limit of the allowable voltage range. This is the upper limit of the allowable voltage range. For the first Preliminary optimized effective voltage value for each traction substation.

[0096] It is understood that the embodiments of this application are designed to update the optimized voltage of the starting traction station. As a new benchmark, the preliminary optimized voltage of the traction substations adjacent to its right is calculated recursively, and the preliminary optimized voltage of the traction substations adjacent to its left is calculated recursively, until the optimized voltage of all traction substations along the entire line is obtained. The optimized voltage satisfies the boundary constraints of the allowable voltage range.

[0097] Therefore, in this embodiment, the optimized effective voltage value and optimized voltage phase of all traction substations can be determined based on the optimized voltage of all traction substations along the entire line. Then, synchronous effective voltage value control commands and voltage phase control commands are generated and sent to the SPC (Static Power Conditioner) of each traction substation in the flexible AC traction power supply system. The SPC adjusts the output of each traction substation in real time according to the given effective voltage value and voltage phase to achieve coordinated control.

[0098] This embodiment first selects the starting traction substation for recursive calculation, sets the initial optimized voltage of the starting traction substation, and then uses this initial optimized voltage as a reference to recursively solve the initial optimized voltage of the remaining traction substations along two preset directions. Finally, the system optimized voltage is generated based on all the initial optimized voltages. This eliminates the need for complex iterative calculations, which is beneficial for quickly calculating the effective value and phase of the optimized voltage of each traction substation. This provides a reliable basis for the voltage collaborative control of the traction power supply system and enhances the real-time performance of collaborative control.

[0099] The technical principle of the collaborative control method for the flexible AC traction power supply system proposed in this application is illustrated below with reference to a specific embodiment.

[0100] This application embodiment obtains the current time. Traction power tolerance of flexible AC traction power supply system traction-driven active power of load traction station output voltage phasor Traction power phasor Equivalent impedance of the line between traction substations Rated voltage RMS value .

[0101] Furthermore, the embodiments of this application employ an approximate power flow algorithm, based on the output voltage phasor of the traction substation. Traction power phasor Equivalent impedance of the line between traction substations Calculate the approximate natural traction power of the traction unit. .

[0102] Furthermore, the embodiments of this application employ an active power coordination algorithm, based on approximate natural traction power. Traction power tolerance traction-driven active power of load The optimal power of the system is calculated. .

[0103] Furthermore, embodiments of this application employ the port voltage analysis method to optimize the power supply of the flexible AC traction power supply system. Approximate natural traction power Rated voltage RMS value Calculate the optimal voltage for a flexible AC traction power supply system .

[0104] The fast collaborative control method for flexible AC traction power supply systems proposed in this application improves energy efficiency. It sequentially calculates the approximate natural traction power, optimized power, and optimized voltage of the traction substations, and generates collaborative control actions for the flexible AC traction power supply system based on the optimized voltage. This eliminates the need for complex iterative simulation calculations, enabling rapid layer-by-layer analytical solutions for power and voltage. This effectively adapts to the real-time control requirements of flexible AC traction power supply systems, while simultaneously achieving reasonable power allocation and coordinated voltage regulation among the traction substations. This avoids power over-limits and abnormal voltage fluctuations, improving the operational stability and energy efficiency of the entire traction power supply system. Therefore, it solves the problem that related technologies employ heuristic algorithms, resulting in long computation times and limiting their application to low-real-time requirements such as system planning, thus failing to meet the real-time control needs of flexible AC traction power supply systems.

[0105] Next, referring to the accompanying drawings, a fast collaborative control device for a flexible AC traction power supply system that improves energy efficiency is described according to an embodiment of this application.

[0106] Figure 5 This is a block diagram of a fast collaborative control device for a flexible AC traction power supply system that improves energy efficiency, provided according to an embodiment of this application.

[0107] like Figure 5 As shown, the energy-efficient flexible AC traction power supply system rapid collaborative control device 50 includes: an acquisition module 100, a calculation module 200, and a control module 300.

[0108] The acquisition module 100 is used to acquire the traction power tolerance of the traction substation, the active power of the traction substation's lighting load, the phasor of the traction substation's output voltage, the phasor of the traction power of the traction substation, the equivalent impedance of the line between traction substations, and the effective value of the rated voltage of the flexible AC traction power supply system.

[0109] The calculation module 200 is used to calculate the approximate natural traction power of the traction substation in the flexible AC traction power supply system based on the traction substation output voltage phasor, the traction substation traction power phasor, and the equivalent impedance of the lines between traction substations.

[0110] The control module 300 is used to calculate the optimized power of the flexible AC traction power supply system based on the approximate natural traction power of the traction station, the traction power tolerance of the traction station, and the active power of the traction station's lighting load. It also calculates the optimized voltage of the flexible AC traction power supply system based on the optimized power, the approximate natural traction power of the traction station, and the effective value of the rated voltage, so as to generate the coordinated control action of the flexible AC traction power supply system based on the optimized voltage.

[0111] Optionally, in one embodiment of this application, the formula for calculating the approximate natural traction power of the traction unit may be, but is not limited to, the following: , in, This is the approximate natural traction power of the first traction unit. For the first The traction power approximates the natural traction power. For the first The traction power approximates the natural traction power. The traction power phasor of the first traction unit. This is the output voltage phasor of the first traction station. This is the output voltage phasor of the second traction station. The equivalent impedance of the line between the first and second traction substations is given. For the first The traction power phasor of each traction unit. For the first The output voltage phasor of each traction station For the first +1 traction substation output voltage phasor For the first The first traction station and the first +1 equivalent impedance of the line between traction substations For the first -1 traction substation output voltage phasor For the first -1 traction station and the first Equivalent impedance of the line between each traction substation For the first The traction power phasor of each traction unit. For the first The output voltage phasor of each traction station For the first -1 traction substation output voltage phasor For the first -1 traction station and the first Equivalent impedance of the line between each traction substation This represents the total number of traction stations.

[0112] Optionally, in one embodiment of this application, the control module 300 includes: a first calculation unit, a second calculation unit, an acquisition unit, and a division unit.

[0113] The first calculation unit is used to calculate the first power of the flexible AC traction power supply system based on the approximate natural traction power of the traction station.

[0114] The second calculation unit is used to calculate the second power of the flexible AC traction power supply system based on the traction power tolerance of the traction station.

[0115] The acquisition unit is used to acquire the total active power of the traction lighting load based on the active power of the traction lighting load in response to the first power being less than or equal to the second power.

[0116] The division unit is used to classify traction substations into four categories—Class I, Class II, Class III, and Class IV—based on the total active power of the dynamic load contained in the traction substation, the amplitude of the approximate natural traction power of the traction substation, and the traction power tolerance of the traction substation, in order to calculate the optimized power.

[0117] Optionally, in one embodiment of this application, the control module 300 includes: a third calculation unit, a fourth calculation unit, a fifth calculation unit, a sixth calculation unit, and a seventh calculation unit.

[0118] The third calculation unit is used to calculate the third power of the flexible AC traction power supply system based on the total active power of the traction load.

[0119] The fourth calculation unit is used to calculate the sum of the active power transferred to the outside of the first, third and fourth traction substations in response to the third power being greater than or equal to zero.

[0120] The fifth calculation unit is used to calculate the sum of the active power transferred to the outside of the first, second and fourth traction substations in response to the third power being less than zero.

[0121] The sixth calculation unit is used to calculate the corrected active power of the traction power supply system of the flexible AC traction power supply system based on the sum of the active power transferred to external systems.

[0122] The seventh calculation unit is used to calculate the optimized power based on the corrected active power of the traction unit.

[0123] Optionally, in one embodiment of this application, the control module 300 includes: a first determining unit, a second determining unit, an eighth calculation unit, a ninth calculation unit, a judgment unit, a first generating unit, and a second generating unit.

[0124] The first determining unit is used to determine the starting traction station of the flexible AC traction power supply system.

[0125] The second determining unit is used to determine the preliminary optimized voltage of the starting traction station based on the effective value of the rated voltage.

[0126] The eighth calculation unit is used to calculate the initial optimized voltage of the traction station that satisfies the first preset direction based on the initial optimized voltage, optimized power, and approximate natural traction power of the traction station.

[0127] The ninth calculation unit is used to calculate the initial optimized voltage of the traction station that satisfies the second preset direction based on the initial optimized voltage, optimized power, and approximate natural traction power of the traction station.

[0128] The judgment unit is used to determine whether the preliminary optimized voltage exceeds the limit.

[0129] The first generation unit is used to generate an optimized voltage based on the preliminary optimized voltage when the out-of-bounds condition is of the no-out-of-bounds type.

[0130] The second generation unit is used to determine the update starting traction station that meets the preset screening conditions based on the preliminary optimized voltage when the boundary crossing situation is a unilateral boundary crossing type, so as to generate an optimized voltage based on the update starting traction station.

[0131] It should be noted that the foregoing explanation of the embodiment of the fast coordinated control method for the flexible AC traction power supply system with improved energy efficiency also applies to the fast coordinated control device for the flexible AC traction power supply system with improved energy efficiency in this embodiment, and will not be repeated here.

[0132] The fast collaborative control device for flexible AC traction power supply systems proposed in this application improves energy efficiency. It sequentially calculates the approximate natural traction power, optimized power, and optimized voltage of the traction substations, and generates collaborative control actions for the flexible AC traction power supply system based on the optimized voltage. Without complex iterative simulation calculations, it can quickly complete the layer-by-layer analytical solution of power and voltage, effectively adapting to the real-time control requirements of flexible AC traction power supply systems. Simultaneously, it achieves reasonable power allocation and coordinated voltage regulation among the traction substations, avoiding power over-limits and abnormal voltage fluctuations, thus improving the operational stability and power supply efficiency of the entire traction power supply system. This solves the problem that related technologies use heuristic algorithms, resulting in long calculation times and limiting their application to situations with low real-time requirements, such as system planning, and failing to meet the real-time control needs of flexible AC traction power supply systems.

[0133] Figure 6 This is a schematic diagram of the structure of an electronic device provided according to an embodiment of this application. The electronic device may include: The memory 601, the processor 602, and the computer program stored on the memory 601 and capable of running on the processor 602.

[0134] When the processor 602 executes the program, it implements the fast collaborative control method for the flexible AC traction power supply system with improved energy efficiency provided in the above embodiments.

[0135] Furthermore, electronic devices also include: Communication interface 603 is used for communication between memory 601 and processor 602.

[0136] The memory 601 is used to store computer programs that can run on the processor 602.

[0137] The memory 601 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0138] If the memory 601, processor 602, and communication interface 603 are implemented independently, then the communication interface 603, memory 601, and processor 602 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 6The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0139] Optionally, in a specific implementation, if the memory 601, processor 602, and communication interface 603 are integrated on a single chip, then the memory 601, processor 602, and communication interface 603 can communicate with each other through an internal interface.

[0140] The processor 602 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0141] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the above-described method for rapid coordinated control of a flexible AC traction power supply system to improve energy efficiency.

[0142] This application also provides a computer program product, including a computer program that, when executed, implements the above-mentioned method for rapid coordinated control of a flexible AC traction power supply system to improve energy efficiency.

[0143] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0144] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0145] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0146] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0147] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, it can be implemented using any one or more of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0148] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0149] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0150] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A flexible AC traction power supply system fast cooperative control method for improving energy efficiency, characterized in that, Includes the following steps: To obtain the traction power tolerance of the traction substation, the active power of the traction substation's dynamic load, the traction substation's output voltage phasor, the traction power phasor of the traction substation, the equivalent impedance of the lines between traction substations, and the effective value of the rated voltage of the flexible AC traction power supply system. Based on the output voltage phasor of the traction substation, the traction power phasor of the traction substation, and the equivalent impedance of the line between the traction substations, the approximate natural traction power of the traction substation in the flexible AC traction power supply system is calculated. Based on the approximate natural traction power of the traction substation, the traction power tolerance of the traction substation, and the active power of the dynamic load of the traction substation, the optimized power of the flexible AC traction power supply system is calculated. Based on the optimized power, the approximate natural traction power of the traction substation, and the effective value of the rated voltage, the optimized voltage of the flexible AC traction power supply system is calculated. Based on the optimized voltage, the coordinated control action of the flexible AC traction power supply system is generated.

2. The method of claim 1, wherein, The formula for calculating the approximate natural traction power of the traction unit is as follows: ， in, This is the approximate natural traction power of the first traction unit. For the first The traction power approximates the natural traction power. For the first The traction power approximates the natural traction power. The traction power phasor of the first traction unit. This is the output voltage phasor of the first traction station. This is the output voltage phasor of the second traction station. The equivalent impedance of the line between the first and second traction substations is given. For the first The traction power phasor of each traction unit. For the first The output voltage phasor of the traction station For the first +1 traction station output voltage phasor For the first The first traction station and the first +1 equivalent impedance of the line between traction substations For the first -1 traction substation output voltage phasor For the first -1 traction station and the first Equivalent impedance of the line between each traction substation For the first The traction power phasor of each traction unit. For the first The output voltage phasor of each traction station For the first -1 traction substation output voltage phasor For the first -1 traction station and the first Equivalent impedance of the line between each traction substation This represents the total number of traction stations.

3. The method according to claim 1, characterized in that, The calculation of the optimized power of the flexible AC traction power supply system based on the approximate natural traction power of the traction substation, the traction power tolerance of the traction substation, and the active power of the traction substation's lighting load includes: Based on the approximate natural traction power of the traction station, calculate the first power of the flexible AC traction power supply system; Based on the traction power tolerance of the traction station, calculate the second power of the flexible AC traction power supply system; In response to the first power being less than or equal to the second power, the total active power of the traction-included lighting load is obtained based on the active power of the traction-included lighting load. Based on the total active power of the dynamic load contained in the traction substation, the amplitude of the approximate natural traction power of the traction substation, and the traction power tolerance of the traction substation, the traction substation is divided into Class I traction substation, Class II traction substation, Class III traction substation, and Class IV traction substation to calculate the optimized power.

4. The method of claim 3, wherein, The calculation of the optimized power of the flexible AC traction power supply system based on the approximate natural traction power of the traction substation, the traction power tolerance of the traction substation, and the active power of the traction substation's lighting load includes: Based on the total active power of the dynamic lighting load contained in the traction, calculate the third power of the flexible AC traction power supply system; In response to the third power being greater than or equal to zero, the sum of the externally transferred active power of the first type of traction station, the third type of traction station, and the fourth type of traction station is calculated; In response to the third power being less than zero, the sum of the externally transferred active power of the first type of traction substation, the second type of traction substation, and the fourth type of traction substation is calculated; Based on the sum of the externally transferred active power, calculate the corrected active power of the traction power supply of the flexible AC traction power supply system; The optimized power is calculated based on the corrected active power of the traction.

5. The method of claim 1, wherein, The calculation of the optimized voltage of the flexible AC traction power supply system based on the optimized power, the approximate natural traction power of the traction station, and the effective value of the rated voltage includes: Determine the starting traction station of the flexible AC traction power supply system; Based on the effective value of the rated voltage, the preliminary optimized voltage of the starting traction station is determined; Based on the initial optimized voltage of the starting traction station, the optimized power, and the approximate natural traction power of the traction station, calculate the initial optimized voltage of the traction station that satisfies the first preset direction; Based on the initial optimized voltage of the starting traction station, the optimized power, and the approximate natural traction power of the traction station, the initial optimized voltage of the traction station that satisfies the second preset direction is calculated. Determine if the preliminary optimized voltage exceeds the limit; If the out-of-bounds situation is a no-out-of-bounds type, then the optimized voltage is generated based on the preliminary optimized voltage; If the boundary crossing is a unilateral boundary crossing, then the updated starting traction station that meets the preset screening conditions is determined based on the preliminary optimized voltage, so as to generate the optimized voltage based on the updated starting traction station.

6. A flexible AC traction power supply system fast coordinated control device for improving energy efficiency, characterized in that, include: The acquisition module is used to acquire the traction power tolerance of the traction substation, the active power of the traction substation's dynamic load, the traction substation's output voltage phasor, the traction power phasor of the traction substation, the equivalent impedance of the line between traction substations, and the effective value of the rated voltage of the flexible AC traction power supply system. The calculation module is used to calculate the approximate natural traction power of the traction substations in the flexible AC traction power supply system based on the output voltage phasor of the traction substations, the traction power phasor of the traction substations, and the equivalent impedance of the lines between the traction substations. The control module is used to calculate the optimized power of the flexible AC traction power supply system based on the approximate natural traction power of the traction station, the traction power tolerance of the traction station, and the active power of the lighting load of the traction station, and to calculate the optimized voltage of the flexible AC traction power supply system based on the optimized power, the approximate natural traction power of the traction station, and the effective value of the rated voltage, so as to generate the coordinated control action of the flexible AC traction power supply system based on the optimized voltage.

7. The apparatus of claim 6, wherein, The control module includes: The first calculation unit is used to calculate the first power of the flexible AC traction power supply system based on the approximate natural traction power of the traction station; The second calculation unit is used to calculate the second power of the flexible AC traction power supply system based on the traction power tolerance of the traction station. The acquisition unit is configured to, in response to the first power being less than or equal to the second power, acquire the total active power of the traction-included lighting load based on the active power of the traction-included lighting load; The division unit is used to divide the traction station into four categories—a first category, a second category, a third category, and a fourth category—based on the total active power of the dynamic load contained in the traction station, the amplitude of the approximate natural traction power of the traction station, and the traction power tolerance of the traction station, in order to calculate the optimized power.

8. An electronic device, comprising: include: The system includes a memory, a processor, and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the program to implement the energy-efficient, flexible AC traction power supply system rapid coordinated control method as described in any one of claims 1-5.

9. A computer-readable storage medium having stored thereon a computer program, characterized in that, The program is executed by the processor to implement the fast collaborative control method for an energy-efficient flexible AC traction power supply system as described in any one of claims 1-5.

10. A computer program product comprising a computer program, characterized in that, The computer program is executed for implementing the flexible AC traction power supply system fast cooperative control method with improved energy efficiency as claimed in any one of claims 1-5.

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