Station control method, device, equipment, medium and product

Abstract

The invention discloses a station control method, device, equipment, medium and product, and relates to the technical field of power system operation control, the method comprises the following steps: determining a system topological graph of a to-be-controlled station, and determining a virtual power angle vector relationship of the to-be-controlled station based on the system topological graph; determining the initial equivalent reactance of the to-be-controlled station, and updating the initial equivalent reactance according to the virtual power angle vector relation, the outgoing line current of the to-be-controlled station and the high-voltage side bus voltage to obtain standby equivalent reactance; and processing the initial equivalent reactance and the standby equivalent reactance by using a preset reactance evaluation rule to obtain a target equivalent reactance of the to-be-controlled station, and controlling the to-be-controlled station to operate based on the target equivalent reactance. The station control method does not need to depend on additional station equipment, is low in use limitation and high in popularization degree, and can increase the damping level of the whole station at low cost.

Description

Technical Field

[0001] The present invention relates to the technical field of power system operation control, and in particular to a station control method, device, equipment, medium and product. Background Art

[0002] Asynchronous power equipment boasts advantages such as cleanliness, environmental friendliness, and energy efficiency, and is increasingly being used and accounting for a significant portion of power systems. However, these devices suffer from drawbacks such as insufficient support capacity, reduced inertia, and decreased damping. Therefore, enhancing the support capacity, inertia, and damping of these devices is a critical concern within power systems.

[0003] Currently, the method for enhancing station damping is to convert non-synchronous power equipment into grid-type equipment, leveraging the damping support provided by these grid-type equipment to improve the station's damping level. For example, the introduction of virtual power system stabilizers and power oscillation damping controllers improves virtual damping control capabilities, leveraging components configured in synchronous motors to enhance station stability. However, the former only reflects the damping of the grid-type energy storage itself and cannot improve the damping level of the entire station. The latter has limited use cases and suffers from duplicate configuration issues, resulting in high station control costs.

[0004] Therefore, designing a station control method with wide applicability, low cost and good station damping enhancement effect is one of the urgent problems to be solved in the power field. Summary of the Invention

[0005] The present invention provides a station control method, device, equipment, medium and product, which can increase the damping level of the entire station at a low cost. The control method does not need to rely on additional station equipment, has low usage restrictions and high popularity.

[0006] According to one aspect of the present invention, a station control method is provided, the method comprising:

[0007] Determine a system topology diagram of the station to be controlled, and determine a virtual power angle vector relationship of the station to be controlled based on the system topology diagram;

[0008] Determine the initial equivalent reactance of the station to be controlled, and update the initial equivalent reactance based on the virtual power angle vector relationship, the outgoing line current of the station to be controlled, and the high-voltage side bus voltage to obtain the standby equivalent reactance;

[0009] The initial equivalent reactance and the standby equivalent reactance are processed using pre-set reactance evaluation rules to obtain the target equivalent reactance of the station to be controlled, and the station to be controlled is controlled to operate based on the target equivalent reactance.

[0010] The station control method of the present invention determines the virtual power angle vector relationship of the station to be controlled based on the system topology diagram, adjusts the equivalent reactance of the station to be controlled with the help of the virtual power angle vector relationship of the station to be controlled, the outgoing line current and the high-voltage side bus voltage, obtains the target equivalent reactance that best matches the current working condition and oscillation type of the station, and controls the station to be controlled to operate based on the target equivalent reactance, thereby improving the damping level of the station. Secondly, the station control method does not require the station to have a synchronous motor, does not rely on additional station equipment, has low usage restrictions, high popularity, and low station control costs. It solves the problems that the introduction of a virtual power system stabilizer and a power oscillation damping controller can only reflect the damping of the grid-type energy storage body and cannot improve the damping level of the entire station, and relies on the components configured in the synchronous motor, which limits the use scenarios.

[0011] According to another aspect of the present invention, a station control device is provided. The station control device is used to implement the station control method in any embodiment of the present invention. The device includes:

[0012] A relationship determination module is used to determine a system topology diagram of the station to be controlled, and determine a virtual power angle vector relationship of the station to be controlled based on the system topology diagram;

[0013] The reactance determination module is used to determine the initial equivalent reactance of the station to be controlled, and update the initial equivalent reactance according to the virtual power angle vector relationship, the outgoing line current of the station to be controlled, and the high-voltage side bus voltage to obtain the standby equivalent reactance;

[0014] The station control module is used to process the initial equivalent reactance and the standby equivalent reactance using pre-set reactance evaluation rules to obtain the target equivalent reactance of the station to be controlled, and control the station to be controlled to operate based on the target equivalent reactance.

[0015] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0016] at least one processor; and a memory communicatively coupled to the at least one processor;

[0017] The memory stores a computer program that can be executed by at least one processor, and the computer program is executed by at least one processor so that the at least one processor can execute the station control method in any embodiment of the present invention.

[0018] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the station control method in any embodiment of the present invention when executed.

[0019] According to another aspect of the present invention, a computer program product is provided. The computer program product includes a computer program. When the computer program is executed by a processor, the terminal control method according to any embodiment of the present invention is implemented.

[0020] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a flow chart of a station control method provided by the present invention;

[0023] Figure 2 It is a flow chart of another station control method provided by the present invention;

[0024] Figure 3 This is a station system topology diagram provided by the present invention;

[0025] Figure 4 This is a schematic diagram of an active ring structure provided by the present invention;

[0026] Figure 5 This is a schematic diagram of a voltage control loop structure provided by the present invention;

[0027] Figure 6 It is a virtual angle vector relationship diagram provided by the present invention;

[0028] Figure 7 This is a schematic structural diagram of a station control device provided by the present invention;

[0029] Figure 8 It is a structural schematic diagram of an electronic device provided by the present invention. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0031] It should be noted that the terms "first", "second", "initial", "intermediate", "candidate", "alternative", "target", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] Figure 1 This is a flow chart of a station control method provided by the present invention. This embodiment is applicable to improving the damping level of the entire station at a low cost. The method can be executed by the station control device provided by the present invention. The device can be implemented in the form of hardware and / or software. In a specific embodiment, the device can be integrated into an electronic device. The following embodiments will be described using the device integrated into an electronic device as an example. Figure 1 , the method specifically comprises the following steps:

[0033] S101. Determine a system topology diagram of a station to be controlled, and determine a virtual power angle vector relationship of the station to be controlled based on the system topology diagram.

[0034] A station to be controlled can be understood as one that requires an increase in damping level. The system topology of a station to be controlled can be understood as a diagram depicting the various components of the station and their interconnections. The system topology can include structures such as the power supply, voltage control loop, current control loop, pulse width modulation (PWM) control, step-up transformer, meshing equipment conductors, resistors, capacitors, inductors, and their connections. The virtual power angle vector relationship can be understood as the relationship between the station's virtual power angle and station parameters, including but not limited to outgoing line current and power factor angle. The virtual power angle relates to the phase difference between the virtual synchronous generator (VSG) and the grid and its dynamic characteristics. The virtual power angle vector relationship includes the relationship between the virtual power angle and internal potential, the relationship between the virtual power angle and power, and the relationship between the virtual power angle and system stability. Through the virtual power angle vector relationship, precise control of the VSG can be achieved, enabling it to better simulate the dynamic characteristics of a synchronous generator, thereby improving the stability and reliability of the power system.

[0035] Specifically, the virtual power angle corresponds to parameters in the system topology diagram. Based on these parameters and corresponding relationships, the virtual power angle vector relationship for the station to be controlled can be analyzed. The parameters in the system topology diagram are updated in real time, and the virtual power angle is also a real-time quantity. This setting ensures precise station control.

[0036] S102: Determine the initial equivalent reactance of the station to be controlled, and update the initial equivalent reactance according to the virtual power angle vector relationship, the outgoing line current of the station to be controlled, and the high-voltage side bus voltage to obtain a standby equivalent reactance.

[0037] The equivalent reactance of a station refers to an equivalent reactance value that is synthesized from the reactive elements within the station during the power system analysis process. This can simplify the analysis of the power system. The calculation and application of equivalent reactance are of great significance for the stable operation and optimal design of the power system. Among them, the initial equivalent reactance of the station to be controlled can be understood as the comprehensive equivalent reactance value of the reactive elements of the station to be controlled before the system parameters are adjusted. The outgoing current of the station to be controlled can be understood as the current flowing out of the high-voltage side bus of the new energy station (such as a wind farm, a photovoltaic power station) and connected to the power grid. The magnitude of the outgoing current depends on the station's generated power, the bus voltage, and the access conditions of the power grid; the high-voltage side bus voltage of the station to be controlled can be understood as the voltage on the bus connected to the high-voltage power grid in the new energy station (such as a wind farm, a photovoltaic power station). The standby equivalent reactance can be understood as the initial equivalent reactance processed using the virtual power angle vector relationship, the outgoing current of the station to be controlled, and the high-voltage side bus voltage. Specifically, the standby equivalent reactance X2=F(X1,I t ,U H ,g(x)), F(·) represents the update logic of the standby equivalent reactance, X1 represents the initial equivalent reactance, I t Indicates the outgoing current, U H represents the high-voltage side bus voltage, and g(x) represents the virtual power angle vector relationship.

[0038] The initial equivalent reactance and the standby equivalent reactance are the equivalent reactances of the power system (i.e., the station to be controlled) at two different times. The correlation between the two equivalent reactances can be used to determine the control capability of the station to be controlled. This setting is intended to select appropriate control parameters and improve the stability and control accuracy of the station.

[0039] S103: Using a preset reactance evaluation rule, the initial equivalent reactance and the standby equivalent reactance are processed to obtain a target equivalent reactance of the station to be controlled, and the station to be controlled is controlled to operate based on the target equivalent reactance.

[0040] Among them, the pre-set reactance evaluation rules can be understood as reactance value assessment schemes set in combination with the system performance evaluation basis, which are used to screen the preferred reactance values that enable the station to be controlled to operate stably. The reactance evaluation rules include damping error evaluation rules. Damping error refers to the deviation between the damping ratio under the current equivalent reactance value and the damping ratio of the adjusted target reactance value due to various factors when measuring or calculating the damping ratio of the station system (such as the power system). The damping error evaluation basis is to evaluate whether the damping error can enable the system to operate stably. If so, it proves that the current equivalent reactance is reasonable and more preferably, that is, when operating with the current equivalent reactance, the station to be controlled is stable and has a high damping level. The more preferred equivalent reactance is the target equivalent reactance. Specifically, the reactance evaluation rules can screen out the target equivalent reactance from the initial equivalent reactance and the standby equivalent reactance, or when the initial equivalent reactance and the standby equivalent reactance are not suitable, propose an update method for the equivalent reactance to further screen the target equivalent reactance. For example, when the damping changes between the initial and standby equivalent reactances are not significant, the standby equivalent reactance is selected as the target reactance. When the damping changes between the initial and standby equivalent reactances are not significant, the target equivalent reactance is selected as the equivalent reactance corresponding to the larger damping. This setting aims to select the equivalent reactance corresponding to the maximum damping as the target equivalent reactance, thereby achieving long-term stable operation of the station without increasing equipment investment and ensuring stable operation of the power system at a lower cost.

[0041] The site control method of the present invention can be applied to photovoltaic power stations, wind farms, hydro-photovoltaic power stations, thermal power stations, wind-solar power stations, energy storage power stations, photovoltaic power stations containing phase regulators, wind farms containing phase regulators, wind-solar power stations containing phase regulators, wind-solar power stations, photovoltaic power stations with supporting energy storage, wind farms with supporting energy storage, wind-solar power stations with supporting energy storage, multi-energy complementary power stations, and a combination system of any of the above power stations and reactive compensation equipment. It has a wide range of applications, a high degree of popularity, and great application prospects.

[0042] The technical solution of the above embodiment determines the virtual power angle vector relationship of the station to be controlled based on the system topology diagram, adjusts the equivalent reactance of the station to be controlled with the help of the virtual power angle vector relationship of the station to be controlled, the outgoing line current and the high-voltage side bus voltage, obtains the target equivalent reactance that best matches the current operating conditions and oscillation type of the station, and controls the station to be controlled to operate based on the target equivalent reactance, thereby improving the damping level of the station. Secondly, the station control method does not require the station to have a synchronous motor, does not rely on additional station equipment, has low usage restrictions, high popularity, and low station control costs. It solves the problems that the introduction of virtual power system stabilizers and power oscillation damping controllers can only reflect the damping of the grid-type energy storage body and cannot improve the damping level of the entire station, relies on the components configured in the synchronous motor, has limited usage scenarios, may also cause repeated configuration of data, and has high station control costs.

[0043] Figure 2 This is a flow chart of another station control method provided by the present invention. This embodiment provides a preferred station control method based on the above embodiment. Specifically, Figure 2 As shown, the method includes:

[0044] S201: Construct a system topology diagram of the station to be controlled, and determine the outgoing line current, high-voltage side bus voltage, and power factor angle of the station to be controlled based on the system topology diagram.

[0045] Among them, the power factor angle of the station to be controlled refers to the phase difference angle between the voltage and current in the power system, which reflects the phase relationship between the active power and the apparent power in the circuit. Figure 3 This is a station system topology diagram provided by the present invention. Figure 3 1 represents a meshing device, 2 represents a meshing step-up transformer, 3 represents a synchronous power supply, 4 represents a synchronous step-up transformer, 5 represents a signal output terminal, and the arrow represents the direction of the outgoing current. Figure 3 The structure of each control loop is not described in detail. Figure 4 This is a schematic diagram of an active ring structure provided by the present invention. Figure 5 This is a schematic diagram of a voltage control loop structure provided by the present invention, combined with Figure 3 、 Figure 4 and Figure 5 The system topology is now complete. The outgoing line current and high-voltage bus voltage can be measured at the signal output terminal, and all links are coordinated to achieve dynamic regulation and stable operation of the controlled station.

[0046] Specifically, the active power loop is designed to differentiate the variable of the virtual power angle δ to obtain the speed variable Δω. The voltage control loop is designed to take into account the control problems of steady-state voltage and transient voltage. For example, during the slow voltage adjustment process, the reactive power instruction of the voltage control takes effect. Under transient voltage disturbances, the reactive power instruction of the voltage control should remain unchanged, and the grid voltage should be adjusted quickly to achieve decoupled control of steady-state voltage and transient voltage. Figure 4 T is the time constant of the approximate differential link, P is the active power of the network, and P ref is the reference value of the grid-forming active power, ω n is the rated speed of the network type, T j is the mesh-type moment of inertia, s is the Laplace operator, θ is the phase angle of the mesh-type device, and D is the damping coefficient. Figure 5 U in H ref is the high voltage side voltage reference value, K is the voltage-to-reactive conversion coefficient, e is a natural number, T cis the automatic voltage control (AVC) communication delay time, Q ref is the AVC reactive power reference value instruction, K q is the droop coefficient, Q gfm is the reactive power measurement value of the network-forming equipment, U ref is the voltage reference value, E m is the outer loop control voltage amplitude.

[0047] The power factor angle of the present invention can be calculated by circuit parameters and used for theoretical analysis and circuit design. The power factor angle can also be measured experimentally to reflect the operating status of the actual circuit. Figure 3 Based on this, combined with the application scenario and analysis purpose, the power factor angle can be determined.

[0048] S202: Determine a virtual angle vector relationship diagram corresponding to the system topology diagram, and determine a virtual power angle vector relationship based on the virtual angle vector relationship diagram, outgoing line current, high-voltage side bus voltage, and power factor angle.

[0049] Among them, the virtual angle vector relationship diagram is used to represent the relationship between different electromotive forces and electric field strengths in the station, which can intuitively show the distribution and force of the station in space. Figure 6 This is a virtual angle vector relationship diagram provided by the present invention. Figure 6 E in the equation is the equivalent electromotive force (virtual quantity) of the wind farm (station to be controlled), I t is the outgoing line current of the station (also called the outgoing line current, obtained directly through measurement), X s is the equivalent reactance of the station (needs to be calculated and is affected by the state changes of each branch in the station), is the power factor angle of the station (calculated by the active and reactive power of the outgoing lines), and δ is the virtual power angle of the station.

[0050] Specifically, Figure 6 The dashed line margin is The process of determining the virtual power angle vector relationship is as follows: 1) The expression of the virtual power angle δ of the station is 2) In the large triangle, according to the Pythagorean theorem, we can get 3) Combining Equation 2 and Equation 1, we can get 4) X for the variable δ in Equation 3 s Derivative, derivative result (virtual power angle vector relationship) The virtual power angle vector relationship of the present invention is essentially the virtual power angle increment and X s Combined with formula 4, according to the damping effect on X s By making small adjustments, you can get the X corresponding to the optimal dampings Parameter value (target equivalent reactance) to achieve step-by-step optimization of damping.

[0051] S203: Determine the initial equivalent reactance of the station to be controlled, and determine the reactance change based on the virtual power angle vector relationship, the outgoing line current, and the high-voltage side bus voltage.

[0052] The reactance change is the adjustment scale of the equivalent reactance. Generally, the reactance change is the product of the reactance adjustment coefficient and the derivative result L. The reactance adjustment coefficient includes but is not limited to 0.08, 0.1 and 0.15. The specific adjustment scale is related to the control logic of the station and is not limited in the present invention.

[0053] Specifically, the reactance variation can be obtained by utilizing the virtual power angle vector relationship in combination with the real-time outgoing line current and the high-voltage side bus voltage.

[0054] S204: Determine a standby equivalent reactance using the initial equivalent reactance, the reactance change, the reactance adjustment coefficient, and the reactance adjustment direction.

[0055] The reactance adjustment direction indicates the relationship between the standby equivalent reactance and the initial equivalent reactance. During normal regulation, the standby equivalent reactance must be greater than the initial equivalent reactance, and the reactance adjustment direction is increasing: Standby equivalent reactance = initial equivalent reactance + reactance change * reactance adjustment coefficient. When damping is decreasing, the standby equivalent reactance must be less than the initial equivalent reactance, and the reactance adjustment direction is decreasing: Standby equivalent reactance = initial equivalent reactance - reactance change * reactance adjustment coefficient. This setting allows for quick determination of the standby equivalent reactance, improving station control efficiency.

[0056] S205 : Calculate the initial active power damping corresponding to the initial equivalent reactance and the standby active power damping corresponding to the standby equivalent reactance.

[0057] Active damping can be estimated by equivalent reactance, specifically by: 1) calculating the natural frequency using equivalent reactance and equivalent capacitance; 2) calculating the damping coefficient using the natural frequency and damping ratio; 3) calculating active damping based on the damping coefficient and equivalent reactance.

[0058] Specifically, after obtaining the initial equivalent reactance and the standby equivalent reactance, the above three steps can be used to solve the initial active damping corresponding to the initial equivalent reactance and the standby active damping corresponding to the standby equivalent reactance.

[0059] S206: Determine whether the damping difference between the initial active power damping and the standby active power damping satisfies a damping error evaluation rule.

[0060] The damping error evaluation rule is that the damping difference is less than a preset damping error evaluation value, such as 0.001, 0.00095, or 0.0015. Generally, the damping error evaluation value can be one thousandth. If the damping difference is not less than the damping error evaluation value, step S207 is executed. If the damping error evaluation rule is that the damping difference is less than the preset damping error evaluation value, step S208 is executed.

[0061] The advantage of this setting is that different processing flows can be deployed for different types of damping differences, so as to obtain the target equivalent reactance accurately and quickly.

[0062] S207: Update the initial equivalent reactance, the standby equivalent reactance, the initial active power damping, and the standby active power damping.

[0063] Determining the target equivalent reactance is a dynamic process, that is, the initial equivalent reactance and the standby equivalent reactance need to be continuously adjusted to further select the target equivalent reactance. Therefore, each damping error judgment conclusion will correspond to an equivalent reactance processing method, including determining the target equivalent reactance, updating the initial equivalent reactance and the standby equivalent reactance. After updating the initial equivalent reactance and the standby equivalent reactance, the active damping corresponding to the initial equivalent reactance and the standby equivalent reactance needs to be recalculated in order to execute the next damping error calculation and evaluation process. In other words, after updating the information of the initial equivalent reactance, the standby equivalent reactance, the initial active damping, and the standby active damping, it is necessary to return to the step (S206) of "determining whether the damping difference between the initial active damping and the standby active damping meets the damping error evaluation rule" to achieve dynamic adjustment of the equivalent reactance.

[0064] In one embodiment, S208 may specifically include: determining whether the standby active damping is greater than the initial active damping; if the standby active damping is greater than the initial active damping, determining that the adjustment direction of the equivalent reactance is an increasing direction, updating the initial active damping based on the parameter value of the standby active damping, updating the initial equivalent reactance based on the parameter value of the standby equivalent reactance, and updating the standby equivalent reactance and standby active damping using the standby equivalent reactance, virtual power angle vector relationship, outgoing line current and high-voltage side bus voltage, for example, determining the standby active damping ζ2 as the new initial active damping ζ1, determining the standby equivalent reactance X2 as the new initial equivalent reactance X1, setting the standby equivalent reactance X2 = X2 + 0.1*L, and calculating the standby active damping corresponding to the new standby equivalent reactance X2. If the standby active power damping is not greater than the initial active power damping, the initial equivalent reactance and initial active power damping are not updated. Instead, the standby equivalent reactance and standby active power damping are updated using the initial equivalent reactance, the virtual power angle vector relationship, the outgoing line current, and the high-voltage bus voltage. For example, the new standby active power damping is determined as X2 = X1 - 0.1 * L, and the standby active power damping corresponding to the new standby equivalent reactance X2 is calculated. This setting has the advantage of accurately matching the equivalent reactance corresponding to the maximum active power damping through a gradual increase and adaptive decrease.

[0065] S208 : Determine the active damping with a higher parameter value between the initial active damping and the standby active damping as the target active damping, and determine the equivalent reactance corresponding to the target active damping as the target equivalent reactance.

[0066] S209. Control the station to be controlled to operate based on the target equivalent reactance.

[0067] The higher the damping parameter value, the more stable the station operation will be in the long term. The purpose of this setting is to quickly screen out the more preferred target equivalent reactance and improve the damping level of the entire station.

[0068] Before calculating the damping, a voltage step disturbance needs to be added to the station system. The voltage step disturbance of the present invention is added to the voltage control loop. After the step disturbance is generated, the active power response of the disturbance can be calculated.

[0069] Optionally, after controlling the station to be controlled to operate based on the target equivalent reactance, the station control method of the present invention also includes: adding a voltage disturbance signal (a voltage step disturbance set in advance) at the disturbance position (voltage control loop) in the system topology diagram, and calculating the response active power of the station to be controlled after adding the voltage disturbance signal; when the response active power is less than the first rated power value, turning off the damping inhibitor of the station to be controlled; when the response active power is greater than the second rated power value, turning on the damping inhibitor of the station to be controlled, wherein the first rated power value is less than the second rated power value.

[0070] The control effect of the damping suppressor is closely related to the active power of the station. The power angle and the equivalent reactance show a typical nonlinear relationship. When the active power is small, the damping generated by the station is limited, which is not conducive to the damping suppressor to exert its control ability. In order to ensure resource utilization and the service life of the damping suppressor, the present invention exits the damping suppressor when the response active power amplitude is low, and puts the damping suppressor into operation when the response active power amplitude is large, thereby further improving the damping level and control ability of the station and ensuring the operating performance of the station.

[0071] The first rated power value of the present invention is a low power threshold value, and the corresponding relationship between the active power, power angle and equivalent reactance is extremely sensitive when the response is lower than the first rated power value, that is, the power angle fluctuates greatly with the change of equivalent reactance, and it is not suitable for investing in a damping suppressor. The first rated power value is a high power threshold value, and the corresponding relationship between the active power, power angle and outgoing line current fluctuates more stably when the response is greater than the second rated power value, that is, the power angle is relatively insensitive to the change of equivalent reactance, and it is suitable for investing in a damping suppressor. The purpose of this setting is to determine the timing of investing and exiting the damping suppressor according to the active power status of the station, further enhance the control capability of the station, and ensure the long-term stable operation of the station.

[0072] The technical solution of the above embodiment determines the virtual power angle vector relationship of the controlled station based on the system topology diagram. The equivalent reactance of the controlled station is adjusted using the virtual power angle vector relationship, outgoing line current, and high-voltage bus voltage of the controlled station to obtain a target equivalent reactance that best matches the station's current operating conditions and oscillation type. The controlled station is then controlled to operate based on the target equivalent reactance, thereby improving the station's damping level. Furthermore, this station control method does not require the station to have a synchronous motor and does not rely on additional station equipment. It has low usage restrictions, high popularity, and low station control costs. Furthermore, the present invention can determine the activation and deactivation timing of the damping suppressor based on the station's active power status, further improving the station's control capabilities and ensuring long-term stable operation. This solves the problems of introducing a virtual power system stabilizer and a power oscillation damping controller that only reflects the damping of the grid-type energy storage itself and cannot improve the damping level of the entire station. The components configured in the synchronous motor rely on the synchronous motor, which limits its use scenarios, may also duplicate data configuration, and leads to high station control costs.

[0073] Figure 7 This is a schematic diagram of the structure of a station control device provided by the present invention. Figure 7 As shown, the device includes: a relationship determination module 301, a reactance determination module 302 and a station control module 303.

[0074] The relationship determination module 301 is used to determine a system topology diagram of the station to be controlled, and determine the virtual power angle vector relationship of the station to be controlled based on the system topology diagram.

[0075] The reactance determination module 302 is used to determine the initial equivalent reactance of the station to be controlled, and update the initial equivalent reactance according to the virtual power angle vector relationship, the outgoing line current of the station to be controlled and the high-voltage side bus voltage to obtain the standby equivalent reactance.

[0076] The station control module 303 is used to process the initial equivalent reactance and the standby equivalent reactance using a preset reactance evaluation rule to obtain a target equivalent reactance of the station to be controlled, and control the station to be controlled to operate based on the target equivalent reactance.

[0077] Optionally, the relationship determination module 301 is specifically used to construct a system topology diagram of the station to be controlled, and determine the outgoing line current, high-voltage side bus voltage and power factor angle of the station to be controlled based on the system topology diagram; determine the virtual angle vector relationship diagram corresponding to the system topology diagram, and determine the virtual power angle vector relationship based on the virtual angle vector relationship diagram, the outgoing line current, the high-voltage side bus voltage and the power factor angle.

[0078] Optionally, the reactance determination module 302 is specifically used to determine the reactance change based on the virtual power angle vector relationship, the outgoing line current and the high-voltage side bus voltage; and determine the standby equivalent reactance using the initial equivalent reactance, the reactance change, the reactance adjustment coefficient and the reactance adjustment direction.

[0079] Optionally, the reactance evaluation rule includes a damping error evaluation rule, and the site control module 303 is specifically used to: calculate the initial active damping corresponding to the initial equivalent reactance and the standby active damping corresponding to the standby equivalent reactance; determine whether the damping difference between the initial active damping and the standby active damping meets the damping error evaluation rule, wherein the damping error evaluation rule is that the damping difference is less than a pre-set damping error evaluation value; if the damping difference is less than the damping error evaluation value, then determine the active damping with a higher parameter value between the initial active damping and the standby active damping as the target active damping, and determine the equivalent reactance corresponding to the target active damping as the target equivalent reactance; if the damping difference is not less than the damping error evaluation value, then update the initial equivalent reactance, the standby equivalent reactance, the initial active damping and the standby active damping, and return to the step of determining whether the damping difference between the initial active damping and the standby active damping meets the damping error evaluation rule.

[0080] Optionally, the station control module 303 is specifically used to determine whether the standby active damping is greater than the initial active damping; if the standby active damping is greater than the initial active damping, the initial active damping is updated based on the parameter value of the standby active damping, the initial equivalent reactance is updated based on the parameter value of the standby equivalent reactance, and the standby equivalent reactance and the standby active damping are updated using the standby equivalent reactance, the virtual power angle vector relationship, the outgoing line current and the high-voltage side bus voltage; if the standby active damping is not greater than the initial active damping, the initial equivalent reactance and the initial active damping are not updated, and the standby equivalent reactance and the standby active damping are updated using the initial equivalent reactance, the virtual power angle vector relationship, the outgoing line current and the high-voltage side bus voltage.

[0081] Optionally, the station control module 303 is also used to: after controlling the station to be controlled to operate based on the target equivalent reactance, add a voltage disturbance signal at the disturbance position in the system topology diagram, and calculate the response active power of the station to be controlled after adding the voltage disturbance signal; when the response active power is less than a first rated power value, turn off the damping inhibitor of the station to be controlled; when the response active power is greater than a second rated power value, turn on the damping inhibitor of the station to be controlled, wherein the first rated power value is less than the second rated power value.

[0082] The station control device provided in the above embodiments can execute the station control method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0083] Figure 8 : is a structural diagram of an electronic device provided by the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or claimed herein.

[0084] like Figure 8As shown, the electronic device 10 includes at least one processor 11 and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (also known as random access memory, RAM) 13, etc., wherein the memory stores a computer program that can be executed by the at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. Various programs and data required for the operation of the electronic device 10 can also be stored in the RAM 13. The processor 11, ROM 12 and RAM 13 are connected to each other via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0085] Multiple components in the electronic device 10 are connected to the I / O interface 15, including an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a magnetic disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0086] The processor 11 can be any general-purpose and / or specialized processing component with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any other suitable processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the terminal control method.

[0087] In some embodiments, the field station control method may be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the field station control method described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to execute the field station control method in any other suitable manner (e.g., via firmware).

[0088] Various embodiments of the systems and techniques described herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), system-on-chip systems (SOCs), programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system that includes at least one programmable processor, which can be a special-purpose or general-purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0089] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when the computer program is executed by the processor, the functions / operations specified in the flowcharts and / or block diagrams are implemented. The computer program may be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0090] In the context of the present invention, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium can include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can be a machine-readable signal medium. A more specific example of a machine-readable storage medium can include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device or any suitable combination of the foregoing.

[0091] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device that has: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0092] The systems and techniques described herein can be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such back-end components, middleware components, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0093] A computing system may include clients and servers. The clients and servers are typically remote from each other and typically interact via a communication network. This client-server relationship arises through computer programs running on the respective computers, creating a client-server relationship. The server may be a cloud server, also known as a cloud computing server or cloud host. This server is a hosting product within the cloud computing service ecosystem that addresses the management difficulties and limited scalability of traditional physical hosting and VPS services.

[0094] In one embodiment, the present invention further includes a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements the station control method of any embodiment of the present invention.

[0095] The computer program product may be implemented in a computer program code for performing the operations of the present invention written in one or more programming languages, or a combination thereof, including object-oriented programming languages and conventional procedural programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0096] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0097] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A station control method, characterized in that: include: Determining a system topology diagram of a station to be controlled, and determining a virtual power angle vector relationship of the station to be controlled based on the system topology diagram; Determining an initial equivalent reactance of the station to be controlled, and updating the initial equivalent reactance according to the virtual power angle vector relationship, the outgoing line current of the station to be controlled, and the high-voltage side bus voltage to obtain a standby equivalent reactance; The initial equivalent reactance and the standby equivalent reactance are processed using a preset reactance evaluation rule to obtain a target equivalent reactance of the station to be controlled, and the station to be controlled is controlled to operate based on the target equivalent reactance.

2. The method according to claim 1, characterized in that The determining of a system topology diagram of the station to be controlled, and determining a virtual power angle vector relationship of the station to be controlled based on the system topology diagram, includes: Constructing a system topology diagram of the station to be controlled, and determining the outgoing line current, high-voltage side bus voltage, and power factor angle of the station to be controlled based on the system topology diagram; Determine a virtual angle vector relationship diagram corresponding to the system topology diagram, and determine the virtual power angle vector relationship based on the virtual angle vector relationship diagram, the outgoing line current, the high-voltage side bus voltage and the power factor angle.

3. The method according to claim 2, characterized in that The updating of the initial equivalent reactance according to the virtual power angle vector relationship, the outgoing line current of the station to be controlled, and the high-voltage side bus voltage to obtain the standby equivalent reactance includes: Determining a reactance change based on the virtual power angle vector relationship, the outgoing line current, and the high-voltage side bus voltage; The standby equivalent reactance is determined by using the initial equivalent reactance, the reactance change, the reactance adjustment coefficient, and the reactance adjustment direction.

4. The method according to claim 1, wherein The reactance evaluation rule includes a damping error evaluation rule. The process of using the preset reactance evaluation rule to process the initial equivalent reactance and the standby equivalent reactance to obtain the target equivalent reactance of the station to be controlled includes: Calculating an initial active power damping corresponding to the initial equivalent reactance and a standby active power damping corresponding to the standby equivalent reactance; determining whether a damping difference between the initial active damping and the standby active damping satisfies a damping error evaluation rule, wherein the damping error evaluation rule is that the damping difference is less than a preset damping error evaluation value; If the damping difference is less than the damping error evaluation value, determining the active damping with a higher parameter value between the initial active damping and the standby active damping as the target active damping, and determining the equivalent reactance corresponding to the target active damping as the target equivalent reactance; If the damping difference is not less than the damping error evaluation value, the initial equivalent reactance, the standby equivalent reactance, the initial active damping and the standby active damping are updated, and the step of determining whether the damping difference between the initial active damping and the standby active damping satisfies the damping error evaluation rule is returned to.

5. The method according to claim 4, characterized in that The updating of the initial equivalent reactance, the standby equivalent reactance, the initial active damping, and the standby active damping includes: determining whether the standby active power damping is greater than the initial active power damping; If the standby active power damping is greater than the initial active power damping, the initial active power damping is updated based on the parameter value of the standby active power damping, the initial equivalent reactance is updated based on the parameter value of the standby equivalent reactance, and the standby equivalent reactance and the standby active power damping are updated using the standby equivalent reactance, the virtual power angle vector relationship, the outgoing line current, and the high-voltage side bus voltage; If the standby active power damping is not greater than the initial active power damping, the initial equivalent reactance and the initial active power damping are not updated, and the standby equivalent reactance and the standby active power damping are updated using the initial equivalent reactance, the virtual power angle vector relationship, the outgoing line current and the high-voltage side bus voltage.

6. The method according to claim 1, characterized in that After controlling the station to be controlled to operate based on the target equivalent reactance, the method further includes: Adding a voltage disturbance signal at the disturbance position in the system topology diagram, and calculating the response active power of the station to be controlled after adding the voltage disturbance signal; When the response active power is less than the first rated power value, closing the damping suppressor of the station to be controlled; When the response active power is greater than a second rated power value, the damping inhibitor of the station to be controlled is turned on, wherein the first rated power value is less than the second rated power value.

7. A station control device, characterized in that: For implementing the station control method according to any one of claims 1 to 6, the station control device comprises: a relationship determination module, configured to determine a system topology of a station to be controlled, and determine a virtual power angle vector relationship of the station to be controlled based on the system topology; a reactance determination module, configured to determine an initial equivalent reactance of the station to be controlled, and update the initial equivalent reactance according to the virtual power angle vector relationship, the outgoing line current of the station to be controlled, and the high-voltage side bus voltage, to obtain a standby equivalent reactance; The station control module is used to process the initial equivalent reactance and the standby equivalent reactance using a preset reactance evaluation rule to obtain a target equivalent reactance of the station to be controlled, and control the station to be controlled to operate based on the target equivalent reactance.

8. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively coupled to the at least one processor; The memory stores a computer program that can be executed by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the station control method described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the station control method according to any one of claims 1 to 6 when executed.

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

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