Method and device for reactive power and voltage control in a direct current sending end power grid and electronic device

Abstract

The present disclosure provides a method and device for reactive voltage control in a direct current sending end power grid and an electronic device. The main technical scheme comprises: reading initial data cross section of a new energy direct current sending end power grid; determining the operation mode of the new energy direct current sending end power grid according to the power grid model topological relationship of the converter station; calculating the respective reactive power adjustment amount of each power plant unit in the direct current sending end power grid according to the initial cross section data and the operation mode; and adjusting the parameters of the new energy direct current sending end power grid according to the reactive power adjustment amount of the new energy power plant unit. The method realizes the reactive voltage control of the multi-mode switching of the AC networking and island system of the flexible direct current sending end power grid. By coordinating the new energy power plant unit, the reactive power regulation capacity of the new energy cluster is fully utilized, the purpose of ensuring the safe and stable operation of the reactive voltage of the new energy direct current sending end power grid in the island mode is achieved, and the automatic voltage control level of the new energy direct current sending end power grid is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of power grid dispatching, and in particular to a method, device, and electronic equipment for controlling reactive voltage in a DC sending-end power grid. Background Art

[0002] In order to cope with global climate change and energy crisis, achieving low-carbon transformation has become the main theme of the development of the world's power industry today. China continues to promote the adjustment of industrial structure and energy structure, and has put forward the dual carbon goals of "carbon peak" in 2030 and "carbon neutrality" in 2060. Building a new power system with new energy as the main body is one of the most important measures to achieve carbon peak and carbon neutrality.

[0003] Considering that my country's new energy gathering areas are generally located in remote areas such as deserts, Gobi, and wastelands, the new energy absorption capacity of the locations of large-scale wind power and photovoltaic power generation projects is relatively limited. It is necessary to build a corresponding new energy transmission, transformation and delivery system to solve the transmission and absorption problems brought about by large-scale grid connection of new energy. Among them, flexible direct current transmission (abbreviated as "flexible direct current") technology is of great significance to power grid dispatching.

[0004] The converter station at the flexible direct current sending end needs to take into account both AC interconnection and AC island operation modes. That is, under normal circumstances, the converter station at the flexible direct current sending end operates in AC island mode, and the new energy power plant is connected to the DC system of the converter station to achieve grid-connected power generation. When the DC system of the converter station is under maintenance, it automatically switches to AC interconnection mode, and the new energy power plant is connected to the AC system of the converter station to achieve grid-connected power generation.

[0005] This is the first such system in the world to utilize a single, isolated flexible DC power transmission system consisting solely of millions of kilowatts of renewable energy and a single converter station. There is no relevant experience available at home or abroad. In island mode, the flexible DC power transmission converter station is similar to an infinite node, with rigid operating constraints. Exceeding these constraints can cause instability in the entire system. Furthermore, the reactive power and voltage control methods and strategies for renewable energy clusters in island mode differ significantly from those of conventional AC power grids, placing higher demands on the reactive power and voltage of renewable energy stations. Summary of the Invention

[0006] The present disclosure provides a method, device, and electronic device for reactive voltage control in a DC power grid. The main purpose is to implement a reactive voltage control method for AC interconnection and AC island multi-mode switching in a DC power grid with a new energy source.

[0007] According to a first aspect of the present disclosure, a method for reactive voltage control in a DC sending-end power grid is provided, comprising:

[0008] Read the initial data section of the new energy DC sending-end power grid;

[0009] Determining the operation mode of the new energy DC sending-end power grid according to the topological relationship of the power grid model of the converter station;

[0010] Calculating reactive power adjustment corresponding to each power plant unit in the DC sending-end power grid according to the initial section data and the operation mode;

[0011] The parameters of the new energy DC sending-end power grid are adjusted according to the reactive power adjustment amount of the new energy power plant units.

[0012] Optionally, the reading of initial section data of the new energy sending-end power grid includes:

[0013] From the new energy DC sending end grid model M, according to the preset control period T c Read the corresponding initial data section;

[0014] The initial section data includes the active power of the lines, the reactive power of the lines, the bus voltage status that needs to be monitored, the operating status of the new energy units, and the reactive sensitivity of the new energy units in the new energy DC sending-end power grid.

[0015] Optionally, determining the operation mode of the new energy DC sending-end power grid according to the topological relationship of the power grid model of the converter station includes:

[0016] If the grid-connected busbar of the new energy power plant in the converter station is electrically connected to the DC system of the converter station and is disconnected from the main transformer of the converter station, then the operation mode of the new energy DC sending-end power grid is determined to be the AC island mode;

[0017] If the grid-connected busbar of the new energy power plant in the converter station is electrically connected to the main transformer of the converter station and is electrically disconnected from the DC system of the converter station, it is determined that the operation mode of the new energy DC sending-end power grid is the AC interconnection mode.

[0018] Optionally, the method further includes:

[0019] Setting the automatic voltage control mode of the AC island mode to a constant voltage control mode;

[0020] The automatic voltage control mode of the AC networking mode is set to a variable voltage control mode.

[0021] Optionally, when it is determined that the operation mode of the new energy DC sending-end power grid is a variable voltage control mode, calculating the reactive power adjustment amount corresponding to each power plant unit in the DC sending-end power grid according to the initial section data and the operation mode includes:

[0022] Get the converter station bus voltage information V at time T0 s,0,p , reactive voltage sensitivity information Sen0 of new energy power plant units, and the optimized target setting value of the central bus voltage of the converter station

[0023] The converter station bus voltage information V s，0，p , reactive voltage sensitivity information Sen0 of new energy power plant units, and the optimized target setting value of the central bus voltage of the converter station Input the first minimization objective function respectively to obtain the reactive adjustment ΔQ of the new energy power plant unit g,0 .

[0024] Optionally, adjusting the parameters of the new energy DC sending-end power grid according to the reactive power adjustment amount of the new energy power plant unit includes:

[0025] According to the reactive power adjustment amount ΔQ of the new energy power plant unit g,0 , and the reactive sensitivity information Sen0 of the new energy power plant unit, the adjustment amount ΔV of the high-voltage side bus voltage of the new energy power plant is calculated h s,0 ;

[0026] According to the adjustment amount ΔV of the high-voltage side bus voltage of the new energy power plant h s,0 and the reactive sensitivity information Sen0 of the new energy power plant unit, and updates the initial reactive power of the new energy power plant unit at the time T0;

[0027] According to the latest initial data of the new energy DC power grid section F m,0 The relevant information can be used to obtain the updated data section F of the new energy DC sending end power grid. m,1 , F m,1 The data section of the new energy DC sending-end power grid at the T0+1 moment provides data support for the next round of automatic voltage control, realizing the automatic voltage control function of the new energy DC sending-end power grid in the AC interconnection mode.

[0028] Optionally, when it is determined that the operation mode of the new energy DC sending-end power grid is a constant voltage control mode, adjusting the parameters of the new energy DC sending-end power grid according to the reactive power adjustment amount of the new energy power plant units includes:

[0029] Get the initial reactive power information Gen of the new energy power plant unit 0,q , reactive voltage sensitivity information Sen0 of the new energy power plant unit, initial reactive voltage accumulation Gate at time T0 0,q ;

[0030] The initial reactive power information Gen 0,q , reactive voltage sensitivity information Sen0 of the new energy power plant unit, initial reactive voltage accumulation Gate at time T0 0,q, input the second minimization objective function, and obtain the reactive adjustment value ΔQ of the new energy power plant unit g,0 .

[0031] Optionally, adjusting the parameters of the new energy DC sending-end power grid according to the reactive power adjustment amount of the new energy power plant unit includes:

[0032] According to the reactive adjustment amount ΔQ of the new energy power plant unit g,0 Update the reactive sensitivity information Sen0 of the new energy power plant unit, the initial reactive power of the new energy power plant unit at time T0, the voltage of the high-voltage side bus, and the voltage information of the converter station bus;

[0033] By adjusting the initial data section F of the new energy DC sending end power grid m,0 Relevant information, obtain updated data section F of the new energy DC sending end power grid m,1 , F m,1 The data section of the new energy DC sending-end power grid at the T0+1 moment provides data support for the next round of automatic voltage control, realizing the automatic voltage control function of the new energy DC sending-end power grid in the island mode.

[0034] Optionally, the method further includes:

[0035] With the preset control period T c As a unit, the grid model topology status of the converter station of the new energy DC sending end grid is periodically checked;

[0036] The data section of the new energy DC sending-end power grid at time T1 is used as the initial data section of the T1 cycle to perform automatic voltage control in the next cycle.

[0037] According to a second aspect of the present disclosure, a device for controlling reactive voltage in a DC sending-end power grid is provided, comprising:

[0038] A reading unit is used to read the initial data section of the new energy DC sending-end power grid;

[0039] A determination unit, configured to determine an operation mode of the new energy DC sending-end power grid according to a topological relationship of a power grid model of a converter station;

[0040] a calculation unit, configured to calculate the reactive power adjustment corresponding to each power plant unit in the DC sending-end power grid according to the initial section data and the operation mode;

[0041] An adjustment unit is used to adjust the parameters of the new energy DC sending-end power grid according to the reactive power adjustment amount of the new energy power plant unit.

[0042] Optionally, the reading unit is further configured to:

[0043] From the new energy DC sending-end grid model M, read the corresponding initial data section according to the preset clock;

[0044] The initial section data includes the active power of the lines, the reactive power of the lines, the bus voltage status that needs to be monitored, the operating status of the new energy units, and the reactive sensitivity of the new energy units in the new energy DC sending-end power grid.

[0045] Optionally, the determination unit includes:

[0046] A first determination module is configured to determine that the operation mode of the new energy DC sending-end power grid is an AC island mode if the grid-connected busbar of the new energy power plant in the converter station is electrically connected to the DC system of the converter station and is disconnected from the main transformer of the converter station;

[0047] The second determination module is used to determine that the operation mode of the new energy DC sending-end power grid is the AC interconnection mode if the grid-connected busbar of the new energy power plant in the converter station is electrically connected to the main transformer of the converter station and is electrically disconnected from the DC system of the converter station.

[0048] Optionally, the determining unit further includes:

[0049] A first setting unit, configured to set the automatic voltage control mode of the AC island mode to a constant voltage control mode;

[0050] The second setting unit is used to set the automatic voltage control mode of the AC networking mode to a variable voltage control mode.

[0051] Optionally, when it is determined that the operation mode of the new energy DC sending-end power grid is a variable voltage control mode, the calculation unit includes:

[0052] The first acquisition module is used to obtain the converter station bus voltage information V at time T0. s,0,p , reactive voltage sensitivity information Sen0 of new energy power plant units, and the optimized target setting value of the central bus voltage of the converter station

[0053] The first input module is used to input the converter station bus voltage information V s，0，p , reactive voltage sensitivity information Sen0 of new energy power plant units, and the optimized target setting value of the central bus voltage of the converter station Input the first minimization objective function respectively to obtain the reactive adjustment ΔQ of the new energy power plant unit g,0 .

[0054] Optionally, the adjustment unit includes:

[0055] The calculation module is used to adjust the reactive power of the new energy power plant unit ΔQg,0 , and the reactive sensitivity information Sen0 of the new energy power plant unit, the adjustment amount ΔV of the high-voltage side bus voltage of the new energy power plant is calculated h s,0 ;

[0056] The first updating module is used to adjust the voltage of the high-voltage side busbar of the new energy power plant according to the adjustment amount ΔV h s,0 and the reactive sensitivity information Sen0 of the new energy power plant unit, and updates the initial reactive power of the new energy power plant unit at the time T0;

[0057] The first loop module is used to calculate the initial data section F of the DC power grid at the latest new energy source. m,0 The relevant information can be used to obtain the updated data section F of the new energy DC sending end power grid. m,1 , F m,1 The data section of the new energy DC sending-end power grid at the T0+1 moment provides data support for the next round of automatic voltage control, realizing the automatic voltage control function of the new energy DC sending-end power grid in the AC interconnection mode.

[0058] Optionally, when it is determined that the operation mode of the new energy DC sending-end power grid is a constant voltage control mode, the calculation unit includes:

[0059] The second acquisition module is used to obtain the initial reactive power information Gen of the new energy power plant unit 0,q , reactive voltage sensitivity information Sen0 of the new energy power plant unit, initial reactive voltage accumulation Gate at time T0 0,q ;

[0060] The second input module is used to input the initial reactive power information Gen 0,q , reactive voltage sensitivity information Sen0 of the new energy power plant unit, initial reactive voltage accumulation Gate at time T0 0,q , input the second minimization objective function, and obtain the reactive adjustment value ΔQ of the new energy power plant unit g,0 .

[0061] Optionally, the adjustment unit includes:

[0062] The second updating module is used to adjust the reactive power of the new energy power plant unit according to the reactive power adjustment value ΔQ g,0 Update the reactive sensitivity information Sen0 of the new energy power plant unit, the initial reactive power of the new energy power plant unit at time T0, the voltage of the high-voltage side bus, and the voltage information of the converter station bus;

[0063] The second loop module is used to adjust the initial data section F of the new energy DC sending end grid m,0related information, obtain the updated data section F of the new energy direct current sending end power grid m,1 , F m,1 The data section of the new energy direct current sending end power grid at the T0+1 time is used as data support for the next round of automatic voltage control, and the automatic voltage control function of the new energy direct current sending end power grid in an island mode is realized.

[0064] Optionally, the apparatus further comprises:

[0065] The checking unit is configured to periodically check the power grid model topology state of the new energy direct current sending end power grid converter station in units of a preset control period T c

[0066] The cycling unit is configured to use the data section of the new energy direct current sending end power grid at the T1 time as the initial data section of the T1 period to perform the next period of automatic voltage control.

[0067] According to a third aspect of the present disclosure, an electronic device is provided, comprising:

[0068] at least one processor; and

[0069] a memory connected to the at least one processor in communication; wherein

[0070] The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the method of the first aspect.

[0071] According to a fourth aspect of the present disclosure, a non-transitory computer readable storage medium storing computer instructions is provided, wherein the computer instructions are used to enable the computer to execute the method of the first aspect.

[0072] According to a fifth aspect of the present disclosure, a computer program product is provided, comprising a computer program which, when executed by a processor, implements the method of the first aspect.

[0073] ​The present disclosure provides a method, device and electronic equipment for reactive voltage control in a DC sending-end power grid. The main technical solutions include: reading the initial data section of the new energy DC sending-end power grid; determining the operating mode of the new energy DC sending-end power grid according to the topological relationship of the power grid model of the converter station; calculating the reactive adjustment amount corresponding to each power plant unit in the DC sending-end power grid according to the initial section data and the operating mode; adjusting the parameters of the new energy DC sending-end power grid according to the reactive adjustment amount of the new energy power plant unit. A reactive voltage control method for multi-mode switching between AC interconnection and island system of flexible DC sending-end power grid is realized. By coordinating the new energy power plant units, the reactive adjustment capability of the new energy cluster itself is fully utilized to achieve the purpose of ensuring the safe and stable operation of the reactive voltage in the island mode of the new energy DC sending-end power grid, thereby improving the automatic voltage control level of the new energy DC sending-end power grid.

[0074] 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 application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] The accompanying drawings are provided to facilitate a better understanding of the present invention and do not constitute a limitation of the present disclosure.

[0076] Figure 1 A flow chart of a method for controlling reactive voltage in a DC sending-end power grid provided by an embodiment of the present disclosure;

[0077] Figure 2 A schematic diagram of an AC islanding mode for a new energy DC sending-end power grid provided in an embodiment of the present disclosure;

[0078] Figure 3 A schematic diagram of a new energy DC sending-end power grid AC interconnection mode provided by an embodiment of the present disclosure;

[0079] Figure 4 A schematic structural diagram of a device for controlling reactive voltage in a DC sending-end power grid provided by an embodiment of the present disclosure;

[0080] Figure 5 A schematic structural diagram of another device for controlling reactive voltage in a DC sending-end power grid provided by an embodiment of the present disclosure;

[0081] Figure 6 A schematic block diagram of an exemplary electronic device 600 is provided for an embodiment of the present disclosure. DETAILED DESCRIPTION

[0082] The following description of exemplary embodiments of the present disclosure is made in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding. These details should be considered as merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0083] The following describes a method, device, and electronic device for controlling reactive voltage in a DC sending-end power grid according to embodiments of the present disclosure with reference to the accompanying drawings.

[0084] Figure 1 A flowchart of a method for controlling reactive voltage in a DC sending-end power grid provided by an embodiment of the present disclosure is provided.

[0085] like Figure 1 As shown, the method comprises the following steps:

[0086] Step 101: read the initial data section of the new energy DC sending-end power grid.

[0087] Set the clock of the new energy DC sending end grid to T m , read T from the new energy DC sending end grid model M m = Initial data section F corresponding to time T0 m,0 . F m,0 Including information such as line active power, line reactive power, bus voltage status that needs to be monitored, operating status of new energy units, and reactive power sensitivity of new energy units in the new energy DC sending-end power grid:

[0088] F m,0 ={Ln 0,p ,Ln 0,q ,Bs0,Gen0,Sen0}

[0089] Wherein, the subscript m,0 corresponds to the clock T of the new energy DC sending end grid. m , T m The initial time is T0, and the new energy unit Gen0 is an equivalent generator model on the low-voltage side of a new energy power plant (not an actual new energy generator).

[0090] Step 102: Determine the operation mode of the new energy DC sending-end power grid based on the topological relationship of the power grid model of the converter station.

[0091] Set the current operation mode of the new energy DC sending end grid to M d ;

[0092] M d ={M nom ,M isd}

[0093] wherein M nom corresponding to the AC interconnected mode, M isd corresponding to the AC island mode.

[0094] setting the automatic voltage control mode of the AC island mode as a constant voltage control mode;

[0095] setting the automatic voltage control mode of the AC interconnected mode as a variable voltage control mode.

[0096] Step 103, calculating the reactive power adjustment amount of each power plant unit in the DC sending end power grid according to the initial cross-section data and the operation mode.

[0097] setting the operation mode of the new energy DC sending end power grid at the T0 moment as M d = M isd , the automatic voltage control mode corresponding to the operation mode (AC island mode) is a constant voltage control mode, that is:

[0098] Strg m = [Strg q ]

[0099] setting the operation mode of the new energy DC sending end power grid at the T0 moment as M d = M nom , the automatic voltage control mode corresponding to the operation mode (AC interconnected mode) is a variable voltage control mode, that is:

[0100] Strg m = [Strg u ]

[0101] According to different voltage control modes, the reactive power adjustment amount of each power plant unit in the DC sending end power grid is calculated.

[0102] Step 104, adjusting the parameters of the new energy DC sending end power grid according to the reactive power adjustment amount of the new energy power plant unit. According to the reactive power adjustment amount of the new energy power plant unit, the reactive power output of the new energy power plant unit is adjusted;

[0103] According to the reactive power adjustment amount of the new energy power plant unit, the reactive power adjustment amount of the new energy power plant outgoing line is adjusted;

[0104] According to the reactive power adjustment amount of the new energy power plant unit, the high-voltage side bus of the new energy power plant is adjusted.

[0105] According to the reactive power adjustment amount of the new energy power plant unit, the bus voltage of the converter station is adjusted.

[0106] The present disclosure provides a method for reactive voltage control in a DC sending-end power grid. The main technical solutions include: reading the initial data section of the new energy DC sending-end power grid; determining the operating mode of the new energy DC sending-end power grid according to the topological relationship of the power grid model of the converter station; calculating the reactive adjustment amount corresponding to each power plant unit in the DC sending-end power grid according to the initial section data and the operating mode; and adjusting the parameters of the new energy DC sending-end power grid according to the reactive adjustment amount of the new energy power plant unit. A reactive voltage control method for multi-mode switching between AC interconnection and island system of flexible DC sending-end power grid is realized. By coordinating the new energy power plant units, the reactive regulation capability of the new energy cluster itself is fully utilized to achieve the purpose of ensuring the safe and stable operation of the reactive voltage in the island mode of the new energy DC sending-end power grid, thereby improving the automatic voltage control level of the new energy DC sending-end power grid.

[0107] As a feasible method of the embodiment of the present application, the following method may be adopted but is not limited to:

[0108] Furthermore, in the embodiment of the present disclosure, the reading of the initial section data of the new energy sending-end power grid includes:

[0109] From the new energy DC sending end grid model M, according to the preset control period T c Read the corresponding initial data section;

[0110] The initial section data includes the active power of the lines, the reactive power of the lines, the bus voltage status that needs to be monitored, the operating status of the new energy units, and the reactive sensitivity of the new energy units in the new energy DC sending-end power grid.

[0111] (2) Set the clock of the new energy DC sending end grid to T m , read T from the new energy DC sending end grid model M m = Initial data section F corresponding to time T0 m,0 , F m,0 Including information such as line active power, line reactive power, bus voltage status that needs to be monitored, operating status of new energy units, and reactive power sensitivity of new energy units in the new energy DC sending-end power grid:

[0112] F m,0 ={Ln 0,p ,Ln 0,q ,Bs0,Gen0,Sen0}

[0113] Wherein, the subscript m,0 corresponds to the clock T of the new energy DC sending end grid. m , T m The initial time is T0, and the new energy unit Gen0 is an equivalent generator model on the low-voltage side of a new energy power plant (not an actual new energy generator).

[0114] (2-1) Assume that the serial number of the outgoing line of the new energy power plant in the new energy DC sending end grid is l, l = 1...L, L represents the total number of outgoing lines of the new energy power plant in the new energy DC sending end grid model M, Ln 0,p and Ln 0,q It is the initial active power and initial reactive power of the new energy power plant at the time T0.

[0115] Ln 0,p =[l,l=1,..L]{P 0,l}

[0116] Ln 0,q =[l,l=1,..L]{Q 0,l}

[0117] Among them, P 0,l and Q 0,l are respectively the active power and initial reactive power of the outgoing line of the lth renewable energy power plant at time T0;

[0118] (2-2) Set the serial number of the busbar that needs to be monitored in the new energy DC sending end grid as s, s = 1 to set the new S, S represents the total number of buses that need to be monitored in the new energy DC sending end grid model M, V 0,p and V 0,h They are the initial state information of the AC bus voltage of the converter station in the new energy DC sending-end power grid and the bus voltage on the high-voltage side of the new energy power plant at time T0, respectively.

[0119] Bs0=[s,s=1,..S]{V s,0,p ,V s,0,h}

[0120] Among them, V s,0,p and V s,0,h They are the voltage status information of the AC busbar of the converter station and the high-voltage side busbar of the new energy power plant that need to be monitored at the sth time T0.

[0121] (2-2-1) Assume that the voltage information of the busbar of the converter station to be monitored at time T0 is V s,0,p , which is composed as follows:

[0122] V s，0，p ={V p s，0，val , V p s，0，max , V p s，0，min}

[0123] Among them, V p s，0，val is the voltage sampling value of the busbar of the converter station that needs to be monitored at time T0, V p s，0，maxis the voltage upper limit of the busbar of the converter station that needs to be monitored at time T0, V p s，0，min is the lower limit value of the voltage of the converter station bus that needs to be monitored at time T0.

[0124] (2-2-2) Assume that the voltage information of the high-voltage busbar of the new energy power plant to be monitored at time T0 is V s，0，h , which is composed as follows:

[0125] V s，0，h ={V h s，0，val , V h s，0，max , V h s，0，min}

[0126] Among them, V h s，0，val is the voltage sampling value of the high-voltage busbar of the sth new energy power plant that needs to be monitored at the time T0, V h s，0，max is the voltage upper limit of the high-voltage busbar of the sth new energy power plant that needs to be monitored at the time T0, V h s，0，min It is the lower limit of the voltage of the high-voltage side busbar of the sth renewable energy power plant that needs to be monitored at the time T0.

[0127] (2-3) Assume that the serial number of the new energy power plant units in the new energy DC sending end grid is g, g = g ... G, G represents the total number of new energy power plant units in the new energy DC sending end grid model M, Gen 0，p and Gen 0，q are the initial active power and initial reactive power of the new energy power plant unit at time T0.

[0128] Gen0 = [g, g = 1, .. G] {Gen g，0，p , Gen g，0，q}

[0129] Among them, Gen g，0，p and Gen g，0，q They are respectively the active and reactive information of the g-th renewable energy power plant unit at the time T0.

[0130] (2-3-1) Active power information Gen of the g-th renewable energy power plant unit at time T0 g ,0, p The composition is as follows:

[0131] Gen g，0，p ={Gen p g，0，val , Gen pg，0，max , Gen p g，0，min}

[0132] Among them, Gen P g，0，val is the active sampling value of the g-th renewable energy power plant unit at time T0, Gen p g，0，max is the upper limit of active power of the g-th renewable energy power plant unit at time T0, Gen P g，0，min is the lower limit of active power of the g-th renewable energy power plant unit at time T0.

[0133] (2-3-2) Active power information Gen of the g-th renewable energy power plant unit at time T0 g，0，q The composition is as follows:

[0134] Gen g，0，q ={Gen q g，0，val , Gen q g，0，max , Gen q g，0，min}

[0135] Among them, Gen q g，0，val is the reactive sampling value of the g-th renewable energy power plant unit at time T0, Gen q g，0，max is the reactive power upper limit of the g-th renewable energy power plant unit at time T0, Gen q g，0，min is the lower limit value of reactive power of the g-th renewable energy power plant unit at time T0.

[0136] (2-4) Assume that the serial number of the new energy power plant units in the new energy DC sending end grid is g, g = g ... G, G represents the total number of new energy power plant units in the new energy DC sending end grid model M, Sen 0，lq and Sen 0，hv With Sen 0，pv They are respectively the sensitivity of the new energy power plant units to the reactive power output of the new energy power plant at time T0, the sensitivity to the bus voltage on the high-voltage side of the new energy power plant, and the sensitivity to the bus voltage of the converter station.

[0137] Sen0=[g,g=1,..G]{Sen g，0，lq , Sen g，0，hv , Sen g，0，pv}

[0138] Among them, Sen g，0，lq , Sen g，0，hv , Sen g，0，pvThey are the reactive sensitivity of the new energy power plant outlet corresponding to the g-th new energy power plant unit at time T0, the bus voltage sensitivity on the high-voltage side of the new energy power plant, and the bus voltage sensitivity of the converter station.

[0139] (2-4-1) Assume that the reactive power adjustment of the g-th renewable energy power plant unit at time T0 is ΔQ g，0 , then the following relationship is satisfied:

[0140] ΔQ l，0 =Sen g，0，lq *ΔQ g，0 (2.1)

[0141] ΔV h s，0 =Sen g，0，hv *ΔQ g，0 (2.2)

[0142] ΔV p s，0 =Sen g，0，pv *ΔQ g，0 (2.3)

[0143] Where ΔQ l，0 The reactive power adjustment of the g-th renewable energy unit at time T0 is ΔQ g，0 When ΔV h s，0 The reactive power adjustment ΔQ of the g-th renewable energy unit at time T0 is g，0 When s, the voltage change of the high-voltage side busbar of the new energy power plant that needs to be monitored; ΔV p s，0 The reactive power adjustment ΔQ of the g-th renewable energy unit at time T0 is g，0 When , the voltage change of the converter station busbar that needs to be monitored in item s.

[0144] Furthermore, in order to facilitate the understanding of the AC island mode of the new energy DC sending end power grid and the AC interconnected mode of the new energy DC sending end power grid, as shown in the following example: Figure 2 As shown, Figure 2 This is a schematic diagram of an AC island mode of a new energy DC sending-end power grid provided by an embodiment of the present disclosure; Figure 3 As shown, Figure 3 This is a schematic diagram of a new energy DC sending-end power grid AC interconnection mode provided by an embodiment of the present disclosure.

[0145] In the embodiment of the present disclosure, determining the operation mode of the new energy DC sending-end power grid according to the topological relationship of the power grid model of the converter station includes:

[0146] If the grid-connected busbar of the new energy power plant in the converter station is electrically connected to the DC system of the converter station and is disconnected from the main transformer of the converter station, then the operation mode of the new energy DC sending-end power grid is determined to be the AC island mode;

[0147] If the grid-connected busbar of the new energy power plant in the converter station is electrically connected to the main transformer of the converter station and is electrically disconnected from the DC system of the converter station, it is determined that the operation mode of the new energy DC sending-end power grid is the AC interconnection mode.

[0148] Furthermore, in the embodiment of the present disclosure, the method further includes:

[0149] Setting the automatic voltage control mode of the AC island mode to a constant voltage control mode;

[0150] The automatic voltage control mode of the AC networking mode is set to a variable voltage control mode.

[0151] Set the automatic voltage control mode of the new energy DC sending end grid to Strg m ;

[0152] Strg m ={Strg u , Strg q}

[0153] Among them, Strg u For variable voltage control mode, Strg a It is the constant voltage control mode.

[0154] The corresponding relationship between the operation mode of the new energy DC sending-end power grid and the automatic voltage control mode is as follows:

[0155] When the operation mode of the converter station of the new energy DC sending-end grid is AC interconnection:

[0156] Strg m =[Strg u ]{M d =M nom}

[0157] When the converter station at the DC sending end of the new energy grid operates in AC island mode:

[0158] Strg m =[Strg q ]{M d =M isd}

[0159] Furthermore, in an embodiment of the present disclosure, when it is determined that the operation mode of the new energy DC sending-end power grid is the variable voltage control mode, calculating the reactive power adjustment corresponding to each power plant unit in the DC sending-end power grid according to the initial section data and the operation mode includes:

[0160] Get the converter station bus voltage information V at time T0 s，0，p , reactive voltage sensitivity information Sen0 of new energy power plant units, and the optimized target setting value of the central bus voltage of the converter station

[0161] The converter station bus voltage information V s，0，p , reactive voltage sensitivity information Sen0 of new energy power plant units, and the optimized target setting value of the central bus voltage of the converter station Input the first minimization objective function respectively to obtain the reactive adjustment ΔQ of the new energy power plant unit g，0 .

[0162] (3) The operation mode of the new energy DC sending end grid is set to M at time T0. d =M nom The automatic voltage control method corresponding to this operating mode (AC networking mode) is as follows:

[0163] (3-1) The automatic voltage control mode under the current operating mode is the variable voltage control mode, that is:

[0164] Strg m =[Strg u ]

[0165] At this time, the new energy DC sending-end power grid needs to achieve overall coordinated voltage control with the upper-level power grid. On the one hand, the voltage control targets of each plant and station should be coordinated with the voltage of the upper-level power grid to meet the voltage safety operation requirements of new energy grid connection in the AC area of ​​the new energy DC sending-end power grid; on the other hand, it is necessary to consider the regulation and coordination of reactive resources with the upper-level power grid to achieve reasonable reactive flow in the new energy DC sending-end power grid area and the upper and lower power grids.

[0166] Therefore, the goal of the automatic voltage control strategy of the new energy DC sending-end power grid is to achieve voltage coordination with the upper-level power grid and reactive power optimization of the entire network by adjusting the voltage of the central bus of the converter station and the voltage of the control bus on the high-voltage side of the new energy power plant.

[0167] (3-2) In the AC interconnection mode, the new energy DC sending end power grid changes the reactive power output of the new energy power plant units through the automatic voltage control strategy, adjusts the voltage of the high-voltage side control bus of the new energy power plant and the voltage of the central bus of the converter station, and makes the voltage of the central bus of the converter station as close as possible to the optimized voltage setting value given by the upper power grid.

[0168] To this end, an objective function using a quadratic programming model can be constructed with the converter station hub bus voltage as the optimization target:

[0169]

[0170] Where ΔQ g is the reactive power adjustment of the units in the new energy power plant, which is the optimization variable of the function; V p s，val Indicates the current value of the central bus voltage of the converter station; It represents the optimal setting value of the central bus voltage of the converter station, which is given by the global reactive power optimization of the upper power grid; g，pv is the sensitivity of the unit reactive power to the converter station bus voltage; θ g is the reactive power balance index of the unit; W p and W q are the two weight coefficients of the function.

[0171] θ g As a reactive power balance indicator of the unit, its meaning is:

[0172]

[0173] Among them, Gen q g，val 、Gen q g，max and Gen q g，min They respectively represent the current reactive power, reactive upper limit and reactive lower limit of the new energy power plant units.

[0174] Minimize the first part of the objective function by ΔQ g Adjust the reactive power output of the new energy power plant units to make the converter station bus voltage V p s，val As close to the optimization target value as possible The second part will be ||θ g || 2 Introducing it into the objective function, on the one hand, ensures the increase of reactive power regulation margin of renewable energy power plant units, and on the other hand, promotes the reactive output of renewable energy power plant units in the region to develop in a more balanced direction, which reflects the optimization goal of achieving the goal. At the same time, try to ensure the balance of reactive power output of each new energy power plant.

[0175] (3-3) At time T0, the converter station bus voltage information V is obtained according to step (2-2) s，0，pAccording to step (2-4), the reactive voltage sensitivity information Sen0 of the new energy power plant unit is obtained, and according to step (3-2), the optimized target setting value of the central bus voltage of the converter station is obtained. Substitute the above data into the minimization objective function of step (3-2) to obtain:

[0176]

[0177] Solve this quadratic programming problem by using the active set algorithm to obtain the reactive adjustment ΔQ of the new energy power plant unit g，0 .

[0178] Furthermore, in the embodiment of the present disclosure, adjusting the parameters of the new energy DC sending-end power grid according to the reactive power adjustment amount of the new energy power plant unit includes:

[0179] According to the reactive power adjustment amount ΔQ of the new energy power plant unit g，0 , and the reactive sensitivity information Sen0 of the new energy power plant unit, the adjustment amount ΔV of the high-voltage side bus voltage of the new energy power plant is calculated h s，0 ;

[0180] According to the adjustment amount ΔV of the high-voltage side bus voltage of the new energy power plant h s，0 and the reactive sensitivity information Sen0 of the new energy power plant unit, and updates the initial reactive power of the new energy power plant unit at the time T0;

[0181] According to the latest initial data of the new energy DC power grid section F m，0 The relevant information can be used to obtain the updated data section F of the new energy DC sending end power grid. m，1 , F m，1 The data section of the new energy DC sending-end power grid at the T0+1 moment provides data support for the next round of automatic voltage control, realizing the automatic voltage control function of the new energy DC sending-end power grid in the AC interconnection mode.

[0182] (3-4) The reactive power adjustment value ΔQ of the new energy power plant unit obtained according to step (3-3) g，0 , using the reactive sensitivity information Sen0 of the new energy power plant unit in step (2-4), the adjustment amount ΔV of the high-voltage side bus voltage of the new energy power plant is obtained h s，0 :

[0183] ΔV h s，0 =Sen g，0，hv *ΔQ g，0

[0184] The master station adjusts the bus voltage on the high voltage side of the new energy power plant by ΔVh s，0 As the control strategy is sent to the new energy power plant substation system, the final control execution is completed by the new energy power plant substation system.

[0185] (3-5) The adjustment value ΔV of the high-voltage side bus voltage of the new energy power plant substation system obtained according to step (3-4) h s，0 , using the reactive sensitivity information Sen0 of the new energy power plant unit in step (2-4), the reactive adjustment amount ΔQ of the new energy power plant unit is converted g，0 Using ΔQ g，0 Update step (2-3) the new energy power plant unit information Gen0 to obtain Gen′0:

[0186] Gen'0=[g,g=1,..G]{Gen g，0，p , Gen′ g，0，q}

[0187] Among them, Gen′ g，0，q The reactive power of the g-th renewable energy power plant unit at time T0 is calculated based on ΔQ g ,0adjusted information.

[0188] According to step (2-3-2), we can know that:

[0189] Gen′ g，0，q ={(Genq g，0，val +ΔQ g，0 ), Gen q g，0，max , Gen q g，0，min}

[0190] (3-6) The reactive power adjustment value ΔQ of the new energy power plant unit obtained according to step (3-5) g，0 And step (2-4) the reactive sensitivity information Sen0 of the new energy power plant unit, update the reactive information of the new energy power plant outgoing line in step (2-1) and the voltage information of the high-voltage side bus of the new energy power plant and the converter station bus in step (2-2).

[0191] (3-6-1) Update the reactive power information Ln of the new energy power plant output in step (2-1) 0，q , and obtain Ln′ 0，q :

[0192] Ln′ 0，q =[l, l=1, ..L]{Q′ 0，l}

[0193] Among them, Q′ 0，lThe reactive power of the outgoing line of the new energy power plant at time T0 is ΔQ g，0 Information after adjusting the reactive output of the unit.

[0194] Q′ 0，l =Q 0，l +ΔQ l，0

[0195] Among them, Q 0，l is the initial reactive power information of the outgoing line of the new energy power plant at time T0, ΔQ l，0 It is the reactive power adjustment value of the outgoing line of the new energy power plant.

[0196] According to step (2-4-1), the reactive power adjustment ΔQ of the new energy power plant outgoing line can be obtained. l，0 and reactive power adjustment ΔQ of new energy power plant units g，0 The relationship is:

[0197] ΔQ l，0 =Sen g，0，lq *ΔQ g，0

[0198] (3-6-2) Update the high-voltage bus voltage information V of the new energy power plant in step (2-2) s，0，h , we get V′ s，0，h :

[0199] V′ s，0，h ={V h′ s，0，val , V h s，0，max , V h s，0，min}

[0200] Among them, V h′ s，0，val The high-voltage bus voltage of the new energy power plant that needs to be monitored at time T0 is calculated based on ΔQ g，0 Information after adjusting the reactive output of the unit.

[0201] V h′ s，0，val =V h s，0，val +ΔV h s，0

[0202] Among them, V h s，0，val is the initial information of the high-voltage bus voltage of the sth new energy power plant that needs to be monitored at time T0, ΔV h s，0 It is the voltage adjustment of the high-voltage side bus of the new energy power plant.

[0203] According to step (2-4-1), the relationship between the voltage adjustment amount ΔV of the high-voltage side bus of the new energy power plant and the reactive power adjustment amount ΔQ of the unit of the new energy power plant is: h s，0 g，0

[0204] ΔV h s，0 = Sen g，0，hv *ΔQ g，0

[0205] (3-6-3) Update the converter station bus voltage information V of step (2-2) to obtain V′: s，0，p s，0，p

[0206] V′ s，0，p = {V p′ s，0，val , V p s，0，max , V p s，0，min}

[0207] Wherein, V p′ s，0，val is the information of the s-th converter station bus voltage to be monitored at the T0 moment after adjusting the reactive power output of the unit according to ΔQ g，0

[0208] V p′ s，0，val = V p s，0，val + ΔV p s，0

[0209] Wherein, V p s，0，val is the initial information of the s-th converter station bus voltage to be monitored at the T0 moment, and ΔV p s，0 is the voltage adjustment amount of the converter station bus.

[0210] According to step (2-4-1), the relationship between the voltage adjustment amount ΔV of the converter station bus and the reactive power adjustment amount ΔQ of the unit of the new energy power plant is: p s，0 g，0

[0211] ΔV p s，0 = Sen g，0，pv *ΔQ g，0

[0212] (3-7) Adjust the initial data section F of the new energy DC sending end power grid through step (3-6) m，0 ​​​​​​​The relevant information of the new energy DC sending terminal power grid can obtain the updated data section F m，1 , F m，1 The data section of the new energy DC sending terminal power grid at the T0+1 time provides data support for the next round of automatic voltage control.

[0213] F m，1 ={Ln 1，p , Ln 1，q , Bs1, Gen1, Sen1}

[0214] (3-8) At the T0+1 time, according to the new energy DC sending terminal power grid data section F m，1 obtained in step (3-7), the process of steps (3-3) to (3-7) is repeated to perform automatic voltage control calculation at the T0+1 time, and the data section F m，2 at the next time is obtained.

[0215] (3-9) Refer to step (3-8) in turn to cycle to realize the automatic voltage control function of the new energy DC sending terminal power grid in the AC networking mode.

[0216] Further, in the embodiment of the present disclosure, when it is determined that the operation mode of the new energy DC sending terminal power grid is the constant voltage control mode, the adjusting the parameters of the new energy DC sending terminal power grid according to the reactive power adjustment amount of the new energy power plant unit comprises:

[0217] obtaining initial reactive power information Gen 0，q of the new energy power plant unit, reactive power voltage sensitivity information Sen0 of the new energy power plant unit, and initial reactive power accumulation Gate 0，q at the T0 time;

[0218] inputting the initial reactive power information Gen 0，q of the new energy power plant unit, the reactive power voltage sensitivity information Sen0 of the new energy power plant unit, and the initial reactive power accumulation Gate 0，q at the T0 time into the second minimum objective function to obtain the reactive power adjustment amount ΔQ g，0 of the new energy power plant unit.

[0219] It is determined that the operation mode of the new energy DC sending terminal power grid at the T0 time is M d =M isd , and the automatic voltage control method corresponding to the operation mode (AC island mode) is as follows:

[0220] (4-1) The automatic voltage control mode under the current operation mode is the constant voltage control mode, that is:

[0221] Strg m =[Strg q ]

[0222] At this time, the new energy DC sending-end power grid adopts a constant voltage control strategy for the bus in the converter station. When the intermittent fluctuations in active power in the new energy area cause fluctuations in the bus voltage of the converter station, the control system in the converter station will respond quickly by adjusting the reactive output of the flexible DC system to keep the bus voltage of the converter station constant.

[0223] Therefore, the goal of the automatic voltage control strategy of the new energy DC sending-end power grid is to give full play to the reactive power regulation capability of the new energy power plant itself, provide reactive power compensation for renewable energy power generation and transmission, reduce the reactive power support of the converter station flexible DC system, and improve the dynamic reactive power margin of the converter station flexible DC system.

[0224] (4-2) Set the reactive power exchange gateway between the new energy power plant and the new energy DC sending end converter station as Gate m The components of the gateway are the outgoing lines of all new energy power plants connected to the converter station.

[0225] At time T0, the reactive switching gate Gate m The reactive sampling value is Gate 0，q , according to step (2-1):

[0226]

[0227] Among them, Gate 0，q It is the initial reactive power accumulation of the new energy power plant outgoing line connected to the converter station at time T0.

[0228] (4-3) According to step (4-1), the goal of the automatic voltage control strategy for the renewable energy DC power grid at the sending end is to have the renewable energy power plant rely on its own regulation capabilities to provide reactive power compensation, thereby increasing the reactive power reserve of the flexible DC system at the converter station. In other words, by regulating the reactive output of the renewable energy power plant's units, the reactive power interaction between the renewable energy power plant and the converter station is minimized.

[0229] To this end, a gate based on the converter station can be constructed. m The reactive power is the optimization target, and the objective function of the quadratic programming model is adopted:

[0230]

[0231] Where ΔQ g is the reactive power adjustment of the unit of the new energy power plant, which is the optimization variable of the function; Gate q Indicates that the converter station gate is currently reactive; set q It is the target value of reactive power control at the gateway. The target value is usually 0 and can also be updated in real time according to the operation mode of the power grid at the DC sending end of the new energy source. g，lqis the sensitivity of the reactive power of the unit to the line mentioned in steps (2-4); θ g is the reactive power balance index of the unit; W p and W q are the two weight coefficients of the function.

[0232] θ g As a reactive power balance indicator of the unit, its meaning is:

[0233]

[0234] Among them, Gen q g，val 、Gen q g，max and Gen q g，min They respectively represent the current reactive power, reactive upper limit and reactive lower limit of the new energy power plant units.

[0235] Minimize the first part of the objective function by ΔQ g Adjust the reactive power output of the new energy power plant units to make the reactive power Gate of the converter station q Get as close to the target value as possible set q The second part will be ||θ g || 2 Introduced into the objective function, on the one hand, it ensures the increase of reactive power regulation margin of renewable energy power plant units, and on the other hand, it promotes the reactive output of renewable energy power plant units in the region to develop in a more balanced direction, which reflects the realization of the control target Gate set q At the same time, try to ensure the balance of reactive power output of each new energy power plant.

[0236] (4-4) At time T0, according to step (2-3), the reactive power information Gen of the new energy power plant unit is obtained 0，q According to step (2-4), the reactive voltage sensitivity information Sen0 of the new energy power plant unit is obtained, and according to step (4-2), the reactive voltage Gate of the converter station gateway is obtained. 0，q , bring the above data into the minimization objective function of step (4-3) to obtain:

[0237]

[0238] Solve this quadratic programming problem by using the active set algorithm to obtain the reactive adjustment ΔQ of the new energy power plant unit g，0 The master station adjusts the reactive power of the new energy power plant unit ΔQ g，0 As the control strategy is sent to the new energy power plant substation system, the final control execution is completed by the new energy power plant substation system.

[0239] Furthermore, in the embodiment of the present disclosure, adjusting the parameters of the new energy DC sending-end power grid according to the reactive power adjustment amount of the new energy power plant unit includes:

[0240] According to the reactive adjustment amount ΔQ of the new energy power plant unit g，0 Update the reactive sensitivity information Sen0 of the new energy power plant unit, the initial reactive power of the new energy power plant unit at time T0, the voltage of the high-voltage side bus, and the voltage information of the converter station bus;

[0241] By adjusting the initial data section F of the new energy DC sending end power grid m，0 Relevant information, obtain updated data section F of the new energy DC sending end power grid m，1 , F m，1 The data section of the new energy DC sending-end power grid at the T0+1 moment provides data support for the next round of automatic voltage control, realizing the automatic voltage control function of the new energy DC sending-end power grid in the island mode.

[0242] (4-5) The reactive power adjustment value ΔQ of the new energy power plant unit obtained by the new energy power plant substation system according to step (4-4) g，0 , update the new energy power plant unit information Gen0 in step (2-3) to obtain Gen′0:

[0243] Gen'0=[g,g=1,..G]{Gen g，0，p , Gen′ g，0，q}

[0244] Among them, Gen′ g，0，q The reactive power of the g-th renewable energy power plant unit at time T0 is calculated based on ΔQ g，0 Adjusted information.

[0245] According to step (2-3-2), we can know that:

[0246] Gen′ g，0，q ={(Gen q g，0，val +ΔQ g，0 ), Gen q g，0，max , Genq g，0，min}

[0247] (4-6) The reactive power adjustment value ΔQ of the new energy power plant unit obtained according to step (4-4) g，0 And step (2-4) the reactive sensitivity information Sen0 of the new energy power plant unit, update the reactive information of the new energy power plant outgoing line in step (2-1) and the voltage information of the high-voltage side bus of the new energy power plant and the converter station bus in step (2-2).

[0248] (4-6-1) Update the reactive power information Ln of the new energy power plant output in step (2-1) 0，q , and obtain Ln′ 0，q :

[0249] Ln′ 0，q =[l, l=1, ..L]{Q′ 0，l}

[0250] Among them, Q′ 0，l The reactive power of the outgoing line of the new energy power plant at time T0 is ΔQ g，0 Adjusted information.

[0251] Q′ 0，l =Q 0，l +ΔQ l，0

[0252] Among them, Q 0，l is the initial reactive power information of the outgoing line of the new energy power plant at time T0, ΔQ l，0 It is the reactive power adjustment value of the outgoing line of the new energy power plant.

[0253] According to step (2-4-1), the reactive power adjustment ΔQ of the new energy power plant outgoing line can be obtained. l，0 and reactive power adjustment ΔQ of new energy power plant units g，0 The relationship is:

[0254] ΔQ l，0 =Sen g，0，lq *ΔQ g，0

[0255] (4-6-2) Update the high-voltage bus voltage information V of the new energy power plant in step (2-2) s，0，h , we get V′ s，0，h :

[0256] V′ s，0，h ={V h′ s，0，val , V h s，0，max , V h s，0，min}

[0257] Among them, V h′ s，0，val The high-voltage bus voltage of the new energy power plant that needs to be monitored at time T0 is calculated based on ΔQ g，0 Adjusted information.

[0258] V h′ s，0，val =V h s，0，val +ΔV h s，0

[0259] Among them, V h s，0，val is the initial information of the high-voltage bus voltage of the sth new energy power plant that needs to be monitored at time T0, ΔV h s，0 It is the voltage adjustment of the high-voltage side bus of the new energy power plant.

[0260] According to step (2-4-1), the voltage adjustment of the high-voltage side busbar of the new energy power plant can be obtained. h s，0 and reactive power adjustment ΔQ of new energy power plant units g，0 The relationship is:

[0261] ΔV h s，0 =Sen g，0，hv *ΔQ g，0

[0262] (4-6-3) Update the converter station bus voltage information V in step (2-2) s，0，p , we get V′ s，0，p :

[0263] V′ s，0，p ={V p′ s，0，val , V p s，0，max , V p s，0，min}

[0264] Among them, V p′ s，0，val The bus voltage of the converter station that needs to be monitored at time T0 is calculated based on ΔQ g，0 Adjusted information.

[0265] V p′ s，0，val =V p s，0，val +ΔV p s，0

[0266] Among them, V p s，0，val is the initial information of the converter station bus voltage that needs to be monitored at time T0, ΔV p s，0 is the voltage adjustment of the converter station bus.

[0267] According to step (2-4-1), the voltage adjustment of the converter station busbar ΔV p s，0 and reactive power adjustment ΔQ of new energy power plant units g，0 The relationship is:

[0268] ΔV p s，0 =Sen g，0，pv *ΔQ g，0

[0269] (4-7) Adjust the initial data section F of the new energy DC power grid through step (4-6) m，0 The relevant information can be used to obtain the updated data section F of the new energy DC sending end power grid. m，1 , F m，1 The data section of the new energy DC sending-end power grid at the T0+1 moment provides data support for the next round of automatic voltage control.

[0270] F m，1 ={Ln 1，p , Ln 1，q , Bs1, Gen1, Sen1}

[0271] (4-8) At time T0+1, the new energy DC power grid data section F obtained in step (4-7) m，1 Repeat steps (4-4) to (4-7) to perform automatic voltage control calculation at time T0+1 and obtain the data section F at the next moment. m，2 .

[0272] (4-9) Refer to step (4-8) and repeat in sequence to realize the automatic voltage control function in the island mode of the new energy DC sending end grid.

[0273] Furthermore, in the embodiment of the present disclosure, the method further includes:

[0274] With the preset control period T c As a unit, the grid model topology status of the converter station of the new energy DC sending end grid is periodically checked;

[0275] The data section of the new energy DC sending-end power grid at time T1 is used as the initial data section of the T1 cycle to perform automatic voltage control in the next cycle.

[0276] In the actual automatic voltage control system of the new energy DC sending end power grid, the system uses the automatic voltage control cycle T c The topology status of the power grid model of the converter station at the new energy DC sending-end power grid is checked periodically.

[0277] Set the automatic voltage control period of the new energy DC sending end grid to T c .

[0278] When the operation mode of the new energy DC sending end grid is AC interconnection mode, the new energy DC sending end grid automatic voltage control system will automatically switch to AC interconnection mode M nom , in the subsequent automatic voltage control period T c The reactive voltage control is performed on the new energy DC sending-end power grid according to the method of step (3).

[0279] When the operation mode of the new energy DC sending end grid is AC island mode, the new energy DC sending end grid automatic voltage control system will automatically switch to AC island mode M isd , in the subsequent automatic voltage control period T c The reactive voltage control is performed on the new energy DC sending-end power grid according to the method of step (4).

[0280] In summary, the reactive voltage control function of automatic switching between AC interconnection and island mode in the new energy DC sending-end power grid is realized.

[0281] Corresponding to the aforementioned method for controlling reactive voltage in a DC power grid at the sending end, the present invention also provides a device for controlling reactive voltage in a DC power grid at the sending end. Since the device embodiments of the present invention correspond to the aforementioned method embodiments, details not disclosed in the device embodiments can be referred to the aforementioned method embodiments and will not be further described in this invention.

[0282] Figure 4 A schematic diagram of the structure of a device for reactive voltage control in a DC sending-end power grid provided by an embodiment of the present disclosure is shown in FIG. Figure 4 As shown, it includes: a reading unit 51, a determination unit 52, a calculation unit 53 and an adjustment unit 54.

[0283] The reading unit 51 is used to read the initial data section of the new energy DC sending-end power grid;

[0284] A determination unit 52 is configured to determine an operation mode of the new energy DC sending-end power grid according to a topological relationship of a power grid model of a converter station;

[0285] A calculation unit 53 is configured to calculate the reactive power adjustment corresponding to each power plant unit in the DC sending-end power grid according to the initial section data and the operation mode;

[0286] The adjustment unit 54 is used to adjust the parameters of the new energy DC sending-end power grid according to the reactive power adjustment amount of the new energy power plant units.

[0287] Furthermore, in the embodiment of the present disclosure, the reading unit 51 is further configured to:

[0288] From the new energy DC sending-end grid model M, read the corresponding initial data section according to the preset clock;

[0289] The initial section data includes the active power of the lines, the reactive power of the lines, the bus voltage status that needs to be monitored, the operating status of the new energy units, and the reactive sensitivity of the new energy units in the new energy DC sending-end power grid.

[0290] Furthermore, in the embodiment of the present disclosure, if Figure 5 As shown, the determination unit 52 includes:

[0291] A first determining module 521 is configured to determine that the operation mode of the new energy DC sending-end power grid is an AC island mode if the grid-connected busbar of the new energy power plant in the converter station is electrically connected to the DC system of the converter station and is disconnected from the main transformer of the converter station;

[0292] The second determination module 522 is used to determine that the operation mode of the new energy DC sending-end power grid is the AC interconnection mode if the grid-connected busbar of the new energy power plant in the converter station is electrically connected to the main transformer of the converter station and is disconnected from the DC system of the converter station.

[0293] Furthermore, in the embodiment of the present disclosure, if Figure 5 As shown, the determination unit 52 further includes:

[0294] A first setting module 523 is configured to set the automatic voltage control mode of the AC island mode to a constant voltage control mode;

[0295] The second setting module 524 is configured to set the automatic voltage control mode of the AC networking mode to a variable voltage control mode.

[0296] Furthermore, in the embodiment of the present disclosure, if Figure 5 As shown, when it is determined that the operation mode of the new energy DC sending-end power grid is the variable voltage control mode, the calculation unit 53 includes:

[0297] The first acquisition module 531 is used to obtain the converter station bus voltage information V at the time T0. s，0，p , reactive voltage sensitivity information Sen0 of new energy power plant units, and the optimized target setting value of the central bus voltage of the converter station

[0298] The first input module 532 is used to input the converter station bus voltage information V s，0，p , reactive voltage sensitivity information Sen0 of new energy power plant units, and the optimized target setting value of the central bus voltage of the converter station Input the first minimization objective function respectively to obtain the reactive adjustment ΔQ of the new energy power plant unit g，0 .

[0299] Furthermore, in the embodiment of the present disclosure, if Figure 5As shown, the adjustment unit 54 includes:

[0300] The calculation module 541 is used to adjust the reactive power of the new energy power plant unit ΔQ g，0 , and the reactive sensitivity information Sen0 of the new energy power plant unit, the adjustment amount ΔV of the high-voltage side bus voltage of the new energy power plant is calculated h s，0 ;

[0301] The first updating module 542 is used to adjust the voltage of the high-voltage side bus of the new energy power plant according to the adjustment amount ΔV h s，0 and the reactive sensitivity information Sen0 of the new energy power plant unit, and updates the initial reactive power of the new energy power plant unit at the time T0;

[0302] The first loop module 543 is used to calculate the initial data section F of the DC power grid at the latest new energy source. m，0 The relevant information can be used to obtain the updated data section F of the new energy DC sending end power grid. m，1 , F m，1 The data section of the new energy DC sending-end power grid at the T0+1 moment provides data support for the next round of automatic voltage control, realizing the automatic voltage control function of the new energy DC sending-end power grid in the AC interconnection mode.

[0303] Furthermore, in the embodiment of the present disclosure, if Figure 5 As shown, when it is determined that the operation mode of the new energy DC sending-end power grid is the constant voltage control mode, the calculation unit 53 includes:

[0304] The second acquisition module 533 is used to obtain the initial reactive power information Gen of the new energy power plant unit. 0，q , reactive voltage sensitivity information Sen0 of the new energy power plant unit, initial reactive voltage accumulation Gate at time T0 0，q ;

[0305] The second input module 534 is used to input the initial reactive power information Gen 0，q , reactive voltage sensitivity information Sen0 of the new energy power plant unit, initial reactive voltage accumulation Gate at time T0 0，q , input the second minimization objective function, and obtain the reactive adjustment value ΔQ of the new energy power plant unit g，0 .

[0306] Furthermore, in the embodiment of the present disclosure, if Figure 5 As shown, the adjustment unit 54 includes:

[0307] The second updating module 544 is used to adjust the reactive power of the new energy power plant according to the reactive power adjustment value ΔQ g，0Update the reactive sensitivity information Sen0 of the new energy power plant unit, the initial reactive power of the new energy power plant unit at time T0, the voltage of the high-voltage side bus, and the voltage information of the converter station bus;

[0308] The second loop module 545 is used to adjust the initial data section F of the new energy DC sending end power grid m，0 Relevant information, obtain updated data section F of the new energy DC sending end power grid m，1 , F m，1 The data section of the new energy DC sending-end power grid at the T0+1 moment provides data support for the next round of automatic voltage control, realizing the automatic voltage control function of the new energy DC sending-end power grid in the island mode.

[0309] Furthermore, in the embodiment of the present disclosure, if Figure 5 As shown, the device also includes:

[0310] The checking unit 55 is used to control the c As a unit, the grid model topology status of the converter station of the new energy DC sending end grid is periodically checked;

[0311] The circulation unit 56 is configured to use the data section of the new energy DC sending-end power grid at time T1 as the initial data section of the T1 cycle to perform automatic voltage control in the next cycle.

[0312] It should be noted that the above explanation of the method embodiment is also applicable to the device of this embodiment, and the principles are the same, which is not limited in this embodiment.

[0313] According to an embodiment of the present disclosure, the present disclosure also provides an electronic device, a readable storage medium, and a computer program product.

[0314] Figure 6 A schematic block diagram of an example electronic device 600 that can be used to implement embodiments of the present disclosure is shown. 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 can also represent various forms of mobile devices, such as personal digital assistants, cellular phones, smartphones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are provided as examples only and are not intended to limit the implementation of the present disclosure described and / or claimed herein.

[0315] like Figure 6As shown, the device 600 includes a computing unit 601, which can perform various appropriate actions and processes according to a computer program stored in a ROM (Read-Only Memory) 602 or a computer program loaded from a storage unit 608 into a RAM (Random Access Memory) 603. Various programs and data required for the operation of the device 600 can also be stored in the RAM 603. The computing unit 601, the ROM 602, and the RAM 603 are connected to each other via a bus 604. An I / O (Input / Output) interface 605 is also connected to the bus 604.

[0316] Various components in device 600 are connected to I / O interface 605, including an input unit 606, such as a keyboard, mouse, etc.; an output unit 607, such as various types of displays, speakers, etc.; a storage unit 608, such as a magnetic disk, optical disk, etc.; and a communication unit 609, such as a network card, modem, wireless communication transceiver, etc. The communication unit 609 allows device 600 to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0317] The computing unit 601 can be any general-purpose and / or specialized processing component with processing and computing capabilities. Some examples of the computing unit 601 include, but are not limited to, a CPU (Central Processing Unit), a GPU (Graphic Processing Unit), various specialized AI (Artificial Intelligence) computing chips, various computing units that run machine learning model algorithms, a DSP (Digital Signal Processor), and any suitable processor, controller, microcontroller, etc. The computing unit 601 performs the various methods and processes described above, such as the method for controlling reactive voltage in a DC power grid. For example, in some embodiments, the method for controlling reactive voltage in a DC power grid can be implemented as a computer software program tangibly embodied in a machine-readable medium, such as the storage unit 608. In some embodiments, part or all of the computer program can be loaded and / or installed on the device 600 via the ROM 602 and / or the communication unit 609. When the computer program is loaded into the RAM 603 and executed by the computing unit 601, one or more steps of the method described above can be performed. Alternatively, in other embodiments, the calculation unit 601 may be configured to execute the aforementioned method for reactive voltage control in a DC sending-end power grid in any other appropriate manner (for example, by means of firmware).

[0318] Various embodiments of the systems and techniques described herein can be implemented in digital electronic circuit systems, integrated circuit systems, FPGAs (Field Programmable Gate Arrays), ASICs (Application-Specific Integrated Circuits), ASSPs (Application-Specific Standard Products), SOCs (System on Chips), CPLDs (Complex Programmable Logic Devices), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include being implemented in one or more computer programs that are executable 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.

[0319] The program code for implementing the method of the present disclosure can be written in any combination of one or more programming languages. These program codes can be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing device so that when the program code is executed by the processor or controller, the functions / operations specified in the flow chart and / or block diagram are implemented. The program code can 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.

[0320] In the context of the present disclosure, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or apparatus. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or apparatus, or any suitable combination of the foregoing. More specific examples of machine-readable storage media may include an electrical connection based on one or more wires, a portable computer disk, a hard disk, RAM, ROM, EPROM (Electrically Programmable Read-Only-Memory) or flash memory, optical fiber, CD-ROM (Compact Disc Read-Only Memory), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0321] To provide interaction with a user, the systems and techniques described herein can be implemented on a computer having: 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 computer. 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).

[0322] The systems and techniques described herein can be implemented in a computing system that includes backend 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 frontend components (e.g., a user computer with a graphical user interface or 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 backend components, middleware components, or frontend 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: LAN (Local Area Network), WAN (Wide Area Network), the Internet, and blockchain networks.

[0323] A computer system may include a client and a server. The client and server are generally remote from each other and typically interact via a communication network. This client-server relationship is established by computer programs running on the respective computers, establishing a client-server relationship. The server may be a cloud server, also known as a cloud computing server or cloud host, a host product within the cloud computing service ecosystem that addresses the management difficulties and limited scalability of traditional physical hosts and VPS services ("Virtual Private Servers" or simply "VPS"). The server may also be a server in a distributed system or a server integrated with blockchain.

[0324] It's important to note that artificial intelligence (AI) is the study of how computers can simulate certain human thought processes and intelligent behaviors (such as learning, reasoning, thinking, and planning). This encompasses both hardware and software technologies. AI hardware technologies generally include sensors, specialized AI chips, cloud computing, distributed storage, and big data processing. AI software technologies primarily encompass computer vision, speech recognition, natural language processing, machine learning / deep learning, big data processing, and knowledge graphs.

[0325] 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 this disclosure can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solutions disclosed in this disclosure can be achieved. This is not a limitation herein.

[0326] The above specific embodiments do not constitute a limitation on the scope of protection of this disclosure. 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 this disclosure shall be included within the scope of protection of this disclosure.

Claims

1. A method for controlling reactive voltage in a DC sending-end power grid, characterized in that: include: Reading the initial data section of the new energy DC sending-end power grid, wherein the initial data section includes the line active power, line reactive power, bus voltage status to be monitored, new energy unit operating status, and new energy unit reactive sensitivity in the new energy DC sending-end power grid; Determining the operating mode of the new energy DC sending-end power grid based on the topological relationship of the power grid model of the converter station; calculating the reactive power adjustment corresponding to each power plant unit in the DC sending-end power grid based on the initial data section and the operating mode; Adjusting the parameters of the new energy DC sending-end power grid according to the reactive power adjustment amount of the new energy power plant unit; The operation mode of the new energy DC sending-end power grid is determined based on the topological relationship of the power grid model of the converter station, including: If the grid-connected busbar of the new energy power plant in the converter station is electrically connected to the DC system of the converter station and is disconnected from the main transformer of the converter station, the operation mode of the new energy DC sending-end power grid is determined to be the AC island mode, and the automatic voltage control mode of the AC island mode is set to the constant voltage control mode; If the grid-connected busbar of the new energy power plant in the converter station is electrically connected to the main transformer of the converter station and is disconnected from the DC system of the converter station, the operation mode of the new energy DC sending-end power grid is determined to be the AC interconnection mode, and the automatic voltage control mode of the AC interconnection mode is set to the variable voltage control mode; Wherein, when it is determined that the operation mode of the new energy DC sending-end power grid is a constant voltage control mode, adjusting the parameters of the new energy DC sending-end power grid according to the reactive power adjustment amount of the new energy power plant unit includes: Obtaining initial reactive power information of new energy power plant units , reactive voltage sensitivity information of new energy power plant units , in the Initial reactive power accumulation at time ; The initial reactive power information of the new energy power plant unit , reactive voltage sensitivity information of new energy power plant units , in the Initial reactive power accumulation at time , input the second minimization objective function, and obtain the reactive power adjustment of the new energy power plant unit ; The adjusting of the parameters of the new energy DC sending-end power grid according to the reactive power adjustment amount of the new energy power plant unit includes: According to the reactive power adjustment amount of the new energy power plant unit Reactive sensitivity information of new energy power plant units , for new energy power plant units in the first The initial reactive power at the moment and the voltage of the high-voltage side bus and the voltage of the converter station bus are updated; By adjusting the initial data section of the new energy DC sending end power grid Get updated data sections of the new energy DC power grid , As the first The data section of the new energy DC sending-end power grid at each moment provides data support for the next round of automatic voltage control, realizing the automatic voltage control function in the island mode of the new energy DC sending-end power grid.

2. The method according to claim 1, characterized in that The initial data section of reading the new energy sending-end power grid includes: From the new energy DC sending end grid model M, according to the preset control cycle Read the corresponding initial data section.

3. The method according to claim 2, characterized in that When it is determined that the operation mode of the new energy DC sending-end power grid is the variable voltage control mode, calculating the reactive power adjustment amount corresponding to each power plant unit in the DC sending-end power grid according to the initial data section and the operation mode includes: Get the Converter station bus voltage information at the moment , reactive voltage sensitivity information of new energy power plant units , the optimized target setting value of the central bus voltage of the converter station t; The converter station bus voltage information , reactive voltage sensitivity information of new energy power plant units , the optimized target setting value of the central bus voltage of the converter station t, respectively input the first minimization objective function to obtain the reactive power adjustment of the new energy power plant unit .

4. The method according to claim 3, characterized in that The adjusting of the parameters of the new energy DC sending-end power grid according to the reactive power adjustment amount of the new energy power plant unit includes: According to the reactive power adjustment amount of the new energy power plant units , and reactive sensitivity information of new energy power plant units , calculate the adjustment amount of the high-voltage side bus voltage of the new energy power plant ; According to the adjustment amount of the high voltage side bus voltage of the new energy power plant and reactive sensitivity information of new energy power plant units , for new energy power plant units in the first The initial reactive power at the moment is updated; According to the latest initial data section of the new energy DC power grid The relevant information can be used to obtain the updated data section of the new energy DC sending end power grid. , As the first The data section of the new energy DC sending-end power grid at each moment provides data support for the next round of automatic voltage control, realizing the automatic voltage control function of the new energy DC sending-end power grid in the AC interconnection mode.

5. The method according to claim 1 or 4, characterized in that The method further comprises: With preset control cycle As a unit, the grid model topology status of the converter station of the new energy DC sending end grid is periodically checked; Will The data section of the new energy DC power grid at the time is used as The initial data section of the cycle is used to perform automatic voltage control for the next cycle.

6. A device for controlling reactive voltage in a DC power grid, characterized in that: include: A reading unit is used to read the initial data section of the new energy DC sending-end power grid, wherein the initial data section includes the line active power, line reactive power, bus voltage status to be monitored, new energy unit operating status, and new energy unit reactive sensitivity in the new energy DC sending-end power grid; A determination unit, configured to determine an operation mode of the new energy DC sending-end power grid according to a topological relationship of a power grid model of a converter station; a calculation unit, configured to calculate the reactive power adjustment corresponding to each power plant unit in the DC sending-end power grid according to the initial data section and the operation mode; An adjustment unit, configured to adjust the parameters of the new energy DC sending-end power grid according to the reactive power adjustment amount of the new energy power plant unit; Wherein, the determination unit includes: A first determination module is configured to determine that the operation mode of the new energy DC sending-end power grid is an AC island mode if the grid-connected busbar of the new energy power plant in the converter station is electrically connected to the DC system of the converter station and is disconnected from the main transformer of the converter station; The second determining module is configured to determine that the operation mode of the new energy DC sending-end power grid is an AC interconnection mode if the grid-connected busbar of the new energy power plant in the converter station is electrically connected to the main transformer of the converter station and is disconnected from the DC system of the converter station; The determining unit further includes: A first setting unit, configured to set the automatic voltage control mode of the AC island mode to a constant voltage control mode; a second setting unit, configured to set the automatic voltage control mode of the AC networking mode to a variable voltage control mode; When it is determined that the operation mode of the new energy DC sending-end power grid is a constant voltage control mode, the calculation unit includes: The second acquisition module is used to obtain the initial reactive power information of the new energy power plant unit , reactive voltage sensitivity information of new energy power plant units , in the Initial reactive power accumulation at time ; The second input module is used to input the initial reactive power information of the new energy power plant unit , reactive voltage sensitivity information of new energy power plant units , in the Initial reactive power accumulation at time , input the second minimization objective function, and obtain the reactive power adjustment of the new energy power plant unit ; Wherein, the adjustment unit includes: The second updating module is used to adjust the reactive power of the new energy power plant unit according to the reactive power of the new energy power plant unit. Reactive sensitivity information of new energy power plant units , for new energy power plant units in the first The initial reactive power at the moment and the voltage of the high-voltage side bus and the voltage of the converter station bus are updated; The second loop module is used to adjust the initial data section of the new energy DC sending end power grid Get updated data sections of the new energy DC power grid , As the first The data section of the new energy DC sending-end power grid at each moment provides data support for the next round of automatic voltage control, realizing the automatic voltage control function in the island mode of the new energy DC sending-end power grid.

7. The device according to claim 6, characterized in that The reading unit is further configured to: From the new energy DC sending-end grid model M, the corresponding initial data section is read according to the preset clock.

8. The device according to claim 6, characterized in that When it is determined that the operation mode of the new energy DC sending-end power grid is a variable voltage control mode, the calculation unit includes: The first acquisition module is used to obtain the Converter station bus voltage information at the moment , reactive voltage sensitivity information of new energy power plant units , the optimized target setting value of the central bus voltage of the converter station t; The first input module is used to input the converter station bus voltage information , reactive voltage sensitivity information of new energy power plant units , the optimized target setting value of the central bus voltage of the converter station t, respectively input the first minimization objective function to obtain the reactive power adjustment of the new energy power plant unit .

9. The device according to claim 8, characterized in that The adjustment unit includes: Calculation module, used for adjusting the reactive power of the new energy power plant unit , and reactive sensitivity information of new energy power plant units , calculate the adjustment amount of the high-voltage side bus voltage of the new energy power plant ; The first updating module is used to adjust the voltage of the high-voltage side busbar of the new energy power plant according to the adjustment amount and reactive sensitivity information of new energy power plant units , for new energy power plant units in the first The initial reactive power at the moment is updated; The first cycle module is used to calculate the initial data section of the DC power grid based on the latest new energy DC power grid The relevant information can be used to obtain the updated data section of the new energy DC sending end power grid. , As the first The data section of the new energy DC sending-end power grid at each moment provides data support for the next round of automatic voltage control, realizing the automatic voltage control function of the new energy DC sending-end power grid in the AC interconnection mode.

10. The device according to claim 6 or 9, characterized in that The device further comprises: Inspection unit for pre-set control period As a unit, the grid model topology status of the converter station of the new energy DC sending end grid is periodically checked; Cycle unit, used to The data section of the new energy DC power grid at the time is used as The initial data section of the cycle is used to perform automatic voltage control for the next cycle.

11. An electronic device, characterized in that: include: at least one processor; as well as a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 5.

12. A non-transitory computer-readable storage medium storing computer instructions, characterized in that: The computer instructions are used to cause the computer to execute the method according to any one of claims 1 to 5.

13. A computer program product, characterized in that The invention comprises a computer program which, when executed by a processor, implements the method according to any one of claims 1 to 5.

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