Voltage reactive power control method and device and electronic equipment

Abstract

The invention discloses a voltage reactive power control method and device and electronic equipment, and belongs to the technical field of power systems. The method comprises the following steps: acquiring operation data of power transmission and transformation equipment and reactive adjustable equipment in the novel power system; determining a lossy change rate and a unit capacity voltage change value according to the configuration parameters and the operation data of the power transmission and transformation equipment and the reactive adjustable equipment; determining a reactive adjustable range according to the rated capacity and / or reactive power of the reactive adjustable equipment; determining the rationality of reactive power adjustment according to the current voltage and reactive power of the power transmission and transformation equipment; under the condition that reactive power adjustment is reasonable, according to the lossy change rate, the unit capacity voltage change value, the configuration parameters, the operation data and the reactive power adjustable range, determining the reactive power adjusting quantity; and transmitting the reactive power adjusting quantity to each reactive adjustable device to execute reactive power control. According to the invention, the reactive power distribution of the power system is optimized, and the unreasonable phenomenon of reactive power adjustment is avoided.

Description

Technical Field

[0001] This application belongs to the field of power system technology, and in particular relates to a voltage reactive power control method, device and electronic equipment. Background Technology

[0002] In current new power systems employing a source-grid-load-storage architecture, the primary method for voltage and reactive power regulation control is decentralized control. This means that when the voltage and power factor at each monitoring point deviate from preset target values, each reactive power resource capable of providing reactive power will respond independently. However, this voltage and reactive power control method may lead to unreasonable reactive power regulation phenomena such as redundancy or insufficiency, reducing the stability and reliability of system operation. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a voltage reactive power control method, device, and electronic equipment, which can realize global voltage reactive power adaptive control of new power systems, optimize the reactive power distribution of the system, avoid unreasonable reactive power regulation, and improve the stability and reliability of system operation.

[0004] In a first aspect, this application provides a voltage reactive power control method, the method comprising:

[0005] Acquire current operating data of power transmission and transformation equipment and reactive power adjustable equipment connected to each target monitoring point in the new power system;

[0006] Based on the configuration parameters of the power transmission and transformation equipment and reactive power adjustable equipment connected to each target monitoring point, as well as the current operating data, determine the loss rate of change and the voltage change value per unit capacity.

[0007] Determine the reactive power adjustable range of the reactive power adjustable equipment based on its rated capacity and / or current reactive power.

[0008] Based on the current voltage and reactive power of the power transmission and transformation equipment connected to each target monitoring point, determine the rationality of the reactive power adjustment of the new power system at the previous moment.

[0009] Assuming the reactive power adjustment was reasonable in the previous moment, the reactive power adjustment amount of the reactive power adjustable equipment is determined based on the loss rate of change, the voltage change per unit capacity, the configuration parameters, the current operating data, and the reactive power adjustable range.

[0010] The reactive power adjustment is transmitted to each reactive power adjustable device to perform reactive power control.

[0011] In the above embodiments, the current operating data of the transmission and transformation equipment and reactive power adjustable equipment connected to each target monitoring point of the new power system are obtained. The loss rate of change and the voltage change value per unit capacity are determined based on the configuration parameters and operating data of the transmission and transformation equipment and reactive power adjustable equipment. The reactive power adjustable range is determined based on the rated capacity and / or current reactive power of the reactive power adjustable equipment. If the reactive power adjustment is reasonable at the previous moment, the reactive power adjustment amount is determined based on the loss rate of change, the voltage change value per unit capacity, the configuration parameters, the current operating data, and the reactive power adjustable range. The adjustment amount is transmitted to the reactive power adjustable equipment to perform reactive power control, thereby realizing global voltage and reactive power adaptive control of the new power system, optimizing the reactive power distribution of the system, avoiding unreasonable reactive power adjustment, and improving the stability and reliability of system operation.

[0012] According to one embodiment of this application, the loss rate of change is determined based on the configuration parameters of the power transmission and transformation equipment and the reactive power adjustable equipment connected to each target monitoring point, as well as the current operating data, including:

[0013] Based on the active power, reactive power, voltage, and impedance of the power transmission and transformation equipment connected to each target monitoring point before the reactive power adjustable equipment is put into operation, the reference power loss of the new power system is determined.

[0014] Based on the active power, reactive power, voltage and impedance of the power transmission and transformation equipment connected to each target monitoring point after the reactive power adjustable equipment is put into operation, as well as the amount of active power occupied by the reactive power of each reactive power adjustable equipment, the input power loss after the reactive power adjustable equipment is put into operation is determined.

[0015] The loss variation rate is determined based on the baseline power loss, the input power loss, and the increase in reactive power due to the input of reactive power adjustable equipment.

[0016] In the above embodiments, before the reactive power adjustable equipment is put into operation, the reference power loss of the new power system is calculated based on the active power, reactive power, voltage, and impedance of the power transmission and transformation equipment connected to each target monitoring point. After the reactive power adjustable equipment is put into operation, the active power loss after the reactive power adjustable equipment is put into operation is calculated based on the same parameters and the reactive power of the reactive power adjustable equipment on the active power. According to the reference power loss, the power loss put into operation, and the reactive power capacity increased by the reactive power adjustable equipment, the loss change rate is calculated. The loss change rate reflects the impact of the reactive power change of the reactive power adjustable equipment on the active power loss of the system. It can be used to determine the reactive power adjustment amount of the reactive power adjustable equipment, thereby optimizing the reactive power distribution of the system and avoiding unreasonable reactive power adjustment.

[0017] According to one embodiment of this application, the voltage change per unit capacity is determined based on the configuration parameters of the power transmission and transformation equipment and the reactive power adjustable equipment connected to each target monitoring point, as well as the current operating data, including:

[0018] Based on the voltage of the transmission and transformation equipment connected to each target monitoring point in the new power system before the reactive power adjustable equipment is put into operation, the voltage of the transmission and transformation equipment connected to each target monitoring point in the new power system after the reactive power adjustable equipment is put into operation, and the reactive power increased by the reactive power adjustable equipment, the unit capacity voltage change value after the reactive power adjustable equipment is put into operation in the new power system is determined.

[0019] In the above embodiments, based on the voltage of the transmission and transformation equipment connected to each target monitoring point in the new power system before and after the reactive power adjustable equipment is put into operation, and the reactive power increased by the reactive power adjustable equipment, the unit capacity voltage change value after the reactive power adjustable equipment is put into operation in the new power system is determined. The unit capacity voltage change value reflects the impact of the reactive power change of the reactive power adjustable equipment on the system voltage, and can be used to determine the reactive power adjustment amount of the reactive power adjustable equipment, thereby optimizing the reactive power distribution of the system and avoiding unreasonable reactive power adjustment.

[0020] According to one embodiment of this application, the reactive power adjustable device includes one or more of reactive power compensation equipment, new energy power generation equipment, and energy storage equipment. The reactive power adjustable range of the reactive power adjustable device is determined based on its rated capacity and / or current reactive power, including:

[0021] When the reactive power adjustable equipment includes reactive power compensation equipment, the reactive power adjustable range of the reactive power compensation equipment shall be determined according to the rated capacity of the reactive power compensation equipment.

[0022] In the case where the reactive power adjustable equipment includes new energy power generation equipment, the reactive power adjustable range of the new energy power generation equipment shall be determined based on the rated capacity and current reactive power of the new energy power generation equipment.

[0023] In the case of reactive power adjustable equipment including energy storage equipment, the reactive power adjustable range of the energy storage equipment is determined based on the rated capacity and current reactive power of the energy storage equipment.

[0024] In the above embodiments, the reactive power adjustment range of the reactive power compensation device is determined based on the rated capacity, and the reactive power adjustment range of the new energy power generation equipment and energy storage equipment is determined based on the rated capacity and the current reactive power. The reactive power adjustment range can be used to determine the reactive power adjustment amount of the reactive power adjustable equipment, thereby optimizing the reactive power distribution of the system and avoiding unreasonable reactive power adjustment.

[0025] According to one embodiment of this application, the method further includes:

[0026] If the reactive power adjustment in the previous moment was unreasonable, the reactive power of the target reactive power adjustable equipment with unreasonable reactive power output is adjusted to make the reactive power output of the target reactive power adjustable equipment reasonable.

[0027] In the above embodiments, the reactive power of the target reactive power adjustable device with unreasonable reactive power output is adjusted so that the reactive power output of the reactive power adjustable device is within a reasonable range, thereby optimizing the reactive power distribution of the new power system and avoiding unreasonable reactive power regulation.

[0028] According to one embodiment of this application, adjusting the reactive power of a target reactive power adjustable device with unreasonable reactive power output includes:

[0029] When the reactive power output is unreasonable, it means that the current voltage of the power transmission and transformation equipment connected to the target monitoring point is greater than the maximum value of the voltage qualified range. In this case, the reactive power of the reactive power compensation equipment is reduced according to the negative value of the larger of the current reactive power and zero.

[0030] When the reactive power output is unreasonable, it means that the current voltage of the power transmission and transformation equipment connected to the target monitoring point is less than the minimum value of the voltage qualified range. In this case, the reactive power of the reactive power compensation equipment is increased according to the negative value of the smaller of the current reactive power and zero.

[0031] Unreasonable reactive power output refers to the situation where the current power factor of the transmission and transformation equipment connected to the access point of the new energy power generation equipment or energy storage equipment is less than the minimum value of the qualified power factor range. The reactive power adjustment amount of the new energy power generation equipment or energy storage equipment is obtained based on the rated capacity of the new energy power generation equipment or energy storage equipment, the current power factor, and the minimum value of the qualified power factor range. The reactive power of the new energy power generation equipment or energy storage equipment is then adjusted based on the reactive power adjustment amount.

[0032] In the above embodiments, if the voltage of the power transmission and transformation equipment connected to the target monitoring point is not within the qualified range, the reactive power of the reactive power compensation equipment will be adjusted accordingly. For power transmission and transformation equipment connected to new energy power generation equipment or energy storage equipment, if the power factor is not within the qualified range, the reactive power of the new energy power generation equipment or energy storage equipment will be adjusted and the active power will be adjusted simultaneously to adjust the power factor. This achieves control over the voltage and power factor of the new power system, optimizes the reactive power distribution of the system, avoids unreasonable reactive power regulation, and improves the stability and reliability of system operation.

[0033] According to one embodiment of this application, assuming the reactive power adjustment at the previous moment is reasonable, the reactive power adjustment amount of the reactive power adjustable device is determined based on the loss rate of change, the voltage change per unit capacity, configuration parameters, current operating data, and the reactive power adjustable range, including:

[0034] Given that the reactive power adjustment in the previous moment was reasonable and the current voltage is within the acceptable voltage range, the reactive power adjustment amount of the reactive power adjustable equipment is determined based on the loss change rate, the voltage change value per unit capacity, the configuration parameters, the current operating data, and the reactive power adjustable range.

[0035] If the reactive power adjustment in the previous moment was reasonable and the current voltage is less than the minimum value of the voltage acceptable range, adjust the current voltage to the voltage acceptable range, and determine the reactive power adjustment amount of the reactive power adjustable equipment based on the loss change rate, the voltage change value per unit capacity, the configuration parameters, the current operating data and the reactive power adjustable range.

[0036] If the reactive power adjustment in the previous moment was reasonable and the current voltage is greater than the maximum value of the voltage acceptable range, adjust the current voltage to the voltage acceptable range, and determine the reactive power adjustment amount of the reactive power adjustable equipment based on the loss rate of change, the voltage change value per unit capacity, the configuration parameters, the current operating data, and the reactive power adjustable range.

[0037] In the above embodiments, if the reactive power adjustment at the previous moment is reasonable and the current voltage is within the acceptable voltage range, the reactive power adjustment amount of the reactive power adjustable device is determined based on the loss rate of change, the voltage change value per unit capacity, configuration parameters, current operating data, and the reactive power adjustable range. If the reactive power adjustment at the previous moment is reasonable and the current voltage is not within the acceptable voltage range, the current voltage is first adjusted to the acceptable voltage range, and then the reactive power adjustment amount of the reactive power adjustable device is determined. This achieves global voltage and reactive power adaptive control of the new power system, optimizes the reactive power distribution of the system, avoids unreasonable reactive power adjustment, and improves the stability and reliability of system operation.

[0038] According to one embodiment of this application, the reactive power adjustment amount of the reactive power adjustable device is determined based on the loss rate of change, the voltage change value per unit capacity, configuration parameters, current operating data, and the reactive power adjustable range, including:

[0039] Calculate the ratio of the loss rate of change to the voltage change per unit capacity for each reactive power adjustable device;

[0040] The reactive power adjustable devices are sorted in descending order of their ratios to form the first sequence. The first minimum number of reactive power adjustable devices that ensures the adjusted voltage of the power transmission and transformation equipment connected to each target monitoring point is within the optimal voltage range and the power factor is within the qualified range is calculated.

[0041] Based on the maximum reactive power value of the reactive power adjustable range corresponding to the first reactive power adjustable device, the reactive power adjustment amount of the first reactive power adjustable device is determined. The first reactive power adjustable device is the reactive power adjustable device in the first sequence whose serial number is less than the first minimum value.

[0042] The reactive power adjustment amount of the reactive power adjustable device whose serial number is equal to the first minimum value in the first sequence is determined based on the optimal voltage range and whether the reactive power adjustable device can be continuously adjusted.

[0043] In the above embodiments, the reactive power adjustable devices are sorted according to the ratio of the loss rate of the reactive power adjustable devices to the voltage change value per unit capacity, and the minimum number of reactive power adjustable devices that can keep the adjusted voltage and power factor of the transmission and transformation equipment connected to the target monitoring point within the qualified range is determined. The reactive power adjustment amount is determined based on the maximum value of the reactive power adjustable range of the first reactive power adjustable device. For the reactive power adjustable device whose serial number is equal to the first minimum value in the first sequence, its reactive power adjustment amount is determined by the optimal voltage range and whether the device can be continuously adjusted. This achieves the minimization of the number of reactive power adjustable devices, reasonable adjustment of the reactive power of the reactive power adjustable devices, realization of global voltage and power factor control of the new power system, optimization of the reactive power distribution of the system, avoidance of unreasonable reactive power adjustment, and improvement of the stability and reliability of system operation.

[0044] According to one embodiment of this application, when the reactive power adjustment at the previous moment is reasonable and the current voltage is less than the minimum value of the voltage acceptable range, adjusting the current voltage to the voltage acceptable range includes:

[0045] Calculate the sum of the loss rate of change and the voltage change per unit capacity for each reactive power adjustable device;

[0046] The reactive power adjustable devices are sorted in descending order to form a second sequence, and the second minimum number of reactive power adjustable devices that make the adjusted voltage of the power transmission and transformation equipment connected to each target monitoring point greater than or equal to the minimum value of the voltage qualified range is calculated.

[0047] Adjust the reactive power of the second reactive power adjustable device to the maximum reactive power value of the reactive power adjustable range corresponding to the second reactive power adjustable device. The second reactive power adjustable device is the reactive power adjustable device in the second sequence whose serial number is less than or equal to the second minimum value.

[0048] In the above embodiments, the reactive power adjustable devices are sorted into a second sequence based on the sum of the loss rate of reactive power adjustable devices and the voltage change value per unit capacity. The minimum number of reactive power adjustable devices that can make the voltage reach the minimum value of the qualified range is determined as the second minimum value. The reactive power of the reactive power adjustable devices with serial numbers less than the second minimum value is adjusted to the maximum reactive power value of the reactive power adjustable range. The current voltage is first adjusted to the qualified voltage range, thereby realizing the voltage control of the new power system, optimizing the reactive power distribution of the system, avoiding unreasonable reactive power adjustment, and improving the stability and reliability of system operation.

[0049] According to one embodiment of this application, when the reactive power adjustment at the previous moment is reasonable and the current voltage is greater than the maximum value of the voltage acceptable range, adjusting the current voltage to the voltage acceptable range includes:

[0050] The first function is determined based on the voltage change per unit capacity and the loss rate of the reactive power adjustable equipment.

[0051] The reactive power adjustable devices are sorted in descending order according to the first function to form a third sequence, and the third minimum number of reactive power adjustable devices that make the adjusted voltage of the power transmission and transformation equipment connected to each target monitoring point less than or equal to the maximum value of the voltage qualified range is calculated.

[0052] Adjust the reactive power of the third reactive power adjustable device to the minimum reactive power value of the reactive power adjustable range corresponding to the third reactive power adjustable device. The third reactive power adjustable device is the reactive power adjustable device in the third sequence whose serial number is less than or equal to the third minimum value.

[0053] In the above embodiments, a first function is determined based on the unit capacity voltage change value and loss rate of the reactive power adjustable equipment. The reactive power adjustable equipment is then sorted from largest to smallest according to the first function to form a third sequence. The minimum number of reactive power adjustable equipment that can adjust the voltage to the maximum value of the qualified range is calculated as the third minimum value. The reactive power of the reactive power adjustable equipment with a sequence number less than the third minimum value is adjusted to the minimum reactive power value of the reactive power adjustable range. The current voltage is first adjusted to the qualified voltage range, thereby realizing the voltage control of the new power system, optimizing the reactive power distribution of the system, avoiding unreasonable reactive power adjustment, and improving the stability and reliability of system operation.

[0054] Secondly, this application provides a voltage reactive power control device, which includes:

[0055] The acquisition unit is used to acquire the current operating data of the power transmission and transformation equipment and reactive power adjustable equipment connected to each target monitoring point in the new power system.

[0056] The first determining unit is used to determine the loss rate of change and the voltage change per unit capacity based on the configuration parameters of the power transmission and transformation equipment and the reactive power adjustable equipment connected to each target monitoring point and the current operating data.

[0057] The second determining unit is used to determine the reactive power adjustable range of the reactive power adjustable equipment based on the reactive power capacity and the current reactive power of the reactive power adjustable equipment.

[0058] The third determining unit is used to determine the rationality of the reactive power adjustment of the new power system at the previous moment based on the current voltage and current reactive power of the power transmission and transformation equipment connected to each target monitoring point.

[0059] The fourth determining unit is used to determine the reactive power adjustment amount of the reactive power adjustable equipment based on the loss rate of change, the voltage change value per unit capacity, the configuration parameters, the current operating data, and the reactive power adjustable range, provided that the reactive power adjustment in the previous moment is reasonable.

[0060] The execution unit is used to transmit the reactive power adjustment amount to each reactive power adjustable device to perform reactive power control.

[0061] In the above embodiments, the voltage and reactive power control device acquires the current operating data of the power transmission and transformation equipment and the reactive power adjustable equipment connected to each target monitoring point of the new power system. Based on the configuration parameters and operating data of the power transmission and transformation equipment and the reactive power adjustable equipment, it determines the loss rate of change and the voltage change value per unit capacity. Based on the rated capacity and / or current reactive power of the reactive power adjustable equipment, it determines its reactive power adjustable range. If the reactive power adjustment is reasonable at the previous moment, it determines the reactive power adjustment amount based on the loss rate of change, the voltage change value per unit capacity, the configuration parameters, the current operating data, and the reactive power adjustable range. The adjustment amount is then transmitted to the reactive power adjustable equipment to execute reactive power control, thereby realizing global voltage and reactive power adaptive control of the new power system. This optimizes the reactive power distribution of the system, avoids unreasonable reactive power adjustment, and improves the stability and reliability of system operation.

[0062] Thirdly, this application provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the voltage reactive power control method as described in the first aspect above.

[0063] Fourthly, this application provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the voltage reactive power control method as described in the first aspect above.

[0064] Fifthly, this application provides a chip including a processor and a communication interface, the communication interface and the processor being coupled together, the processor being used to run programs or instructions to implement the voltage reactive power control method as described in the first aspect above.

[0065] Sixthly, this application provides a computer program product, including a computer program that, when executed by a processor, implements the voltage and reactive power control method as described in the first aspect above.

[0066] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0067] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0068] Figure 1 This is a schematic flowchart of a voltage reactive power control method provided in some embodiments of this application;

[0069] Figure 2 This is a schematic diagram of the structure of a voltage reactive power control device provided in some embodiments of this application;

[0070] Figure 3 These are schematic diagrams of the structure of electronic devices provided in some embodiments of this application. Detailed Implementation

[0071] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0072] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0073] The new power system enhances its dynamic power balance capability and promotes efficient energy utilization and flexible dispatch through various interactive mechanisms, such as source-source complementarity, source-grid coordination, grid-load interaction, grid-storage interaction, and source-load interaction. The equipment within the new power system can encompass various types, involving devices on the power generation side, grid side, load side, and energy storage side, such as new energy power generation equipment (photovoltaic power generation, wind power generation, tidal power generation, etc.), transmission and transformation equipment, energy storage equipment, and power consumption equipment.

[0074] Currently, the switching of reactive power resources in the new power system is mainly based on the voltage and power factor settings issued by the dispatch center. After the voltage at each monitoring point exceeds the limit, the new energy power generation equipment, energy storage equipment, and reactive power compensation equipment operate independently without overall coordinated control. This results in situations such as over-adjustment of voltage, voltage meeting system requirements but with large overall active power loss, excessive reactive power adjustment but small voltage change still not meeting requirements, and excessive reactive power output from new energy power generation equipment affecting active power output. Therefore, it is necessary to comprehensively consider the impact of reactive power resource switching on the voltage, power factor, and active power loss at the access point (i.e., monitoring point) to carry out precise and reliable dispatch control of reactive power resource switching. It should be noted that this application refers to equipment capable of affecting reactive power as reactive resources, that is, reactive adjustable equipment, which includes one or more of the following: reactive power compensation equipment (such as capacitors, reactors, synchronous condensers, static synchronizing compensators (STATCOM), static var generators (SVG) etc.), new energy power generation equipment (such as photovoltaic power generation equipment, wind power generation equipment etc.), and energy storage equipment (such as electrochemical energy storage equipment, supercapacitor energy storage equipment etc.).

[0075] The effectiveness of reactive power adjustment equipment in reducing power system losses is evaluated based on the change in active power loss caused by reactive power flow before and after the equipment's implementation. Traditional power system analysis methods assume transmission lines consume reactive power, and related technologies do not consider line-to-ground capacitance in the equivalent network used when calculating the power savings of parallel reactive power adjustment equipment. Furthermore, configuring capacitive reactive power compensation in substations can reduce the reactive power transmitted from the power source to the substation, thereby reducing active power loss. The reactive power economic equivalent is an indicator reflecting this issue, specifically defined as the increase in active power loss due to the addition of one kilovar of reactive power compensation capacity at a node in the power grid.

[0076] To address the aforementioned technical problems, embodiments of this application provide a voltage reactive power control method, apparatus, and electronic device. The following detailed description, in conjunction with the accompanying drawings, provides specific embodiments and their application scenarios.

[0077] The voltage and reactive power control method provided in this application can be executed by an electronic device or a functional module or entity in an electronic device that can implement the voltage and reactive power control method. The electronic devices mentioned in this application include, but are not limited to, controllers or processors, servers, etc. in a new power system. The voltage and reactive power control method provided in this application is described below using an electronic device as the execution subject as an example.

[0078] Figure 1 This is a schematic flowchart of a voltage reactive power control method provided in some embodiments of this application. For example... Figure 1As shown, the voltage reactive power control method includes steps 110, 120, 130, 140, 150 and 160.

[0079] Step 110: Obtain the current operating data of the power transmission and transformation equipment and reactive power adjustable equipment connected to each target monitoring point in the new power system.

[0080] It should be noted that the target monitoring point can be a new energy power generation equipment access point, an energy storage equipment access point, or a new power system grid connection point. A new energy power generation equipment access point refers to a specific node within a new power system where new energy power generation equipment is connected; an energy storage equipment access point refers to a specific node within a new power system where energy storage equipment is connected; and a new power system grid connection point refers to the node connecting the new power system to the grid side. The transmission and transformation equipment connected to the target monitoring point is a collective term for transmission lines or transformers connected to the new energy power generation equipment access point, energy storage equipment access point, or new power system grid connection point.

[0081] The current operating data of the transmission and transformation equipment and reactive power adjustable equipment connected to each target monitoring point in the new power system include active power, reactive power, voltage, power factor, etc.

[0082] Step 120: Determine the loss rate of change and the voltage change per unit capacity based on the configuration parameters of the power transmission and transformation equipment and the reactive power adjustable equipment connected to each target monitoring point, as well as the current operating data.

[0083] It is understandable that the reactive power output of the adjustable reactive power equipment changes before and after it is put into operation. The configuration parameters of power transmission and transformation equipment and adjustable reactive power equipment refer to the technical specifications and performance indicators of these devices, which are usually marked on the nameplate of the corresponding equipment. For example, rated capacity, reactive power capacity, impedance, allowable voltage range, minimum power factor requirement, and optimal voltage range.

[0084] It is understandable that the unit capacity voltage change value represents the relationship between the voltage change value of the transmission and transformation equipment connected to each target monitoring point in the new power system before and after the reactive power adjustable equipment is put into operation and the reactive power put into operation by the reactive power adjustable equipment. It reflects the impact of the reactive power change of the reactive power adjustable equipment on the voltage of the transmission and transformation equipment connected to each target monitoring point in the new power system. That is, for every certain amount of reactive power put into operation, the voltage will change accordingly.

[0085] Understandably, the loss rate of change represents the relationship between the change in active power loss of the new power system before and after the activation of the reactive power adjustable equipment and the reactive power input by the reactive power adjustable equipment. It reflects the impact of the reactive power change of the reactive power adjustable equipment on the active power loss of the new power system. The loss rate of change of the new power system can be determined through the configuration parameters of the transmission and transformation equipment and the reactive power adjustable equipment connected to each target monitoring point, as well as the current operating data.

[0086] Step 130: Determine the reactive power adjustable range of the reactive power adjustable equipment based on its rated capacity and / or current reactive power.

[0087] The reactive power capacity of the nth adjustable reactive power device k in the new power system is named Q. nk At time t, the real-time reactive power of the adjustable reactive power device k is Q′. tnk The reactive power regulation is ΔQ′ nk The adjustable range of reactive power is Q. nkmin ~Q nkmax ;

[0088] In some embodiments, the reactive power adjustable device includes one or more of reactive power compensation devices, new energy power generation devices, and energy storage devices. The reactive power adjustable range of the reactive power adjustable device is determined based on its rated capacity and / or current reactive power, including:

[0089] When the reactive power adjustable equipment includes reactive power compensation equipment, the reactive power adjustable range of the reactive power compensation equipment shall be determined according to the rated capacity of the reactive power compensation equipment.

[0090] In the case where the reactive power adjustable equipment includes new energy power generation equipment, the reactive power adjustable range of the new energy power generation equipment shall be determined based on the rated capacity and current reactive power of the new energy power generation equipment.

[0091] In the case of reactive power adjustable equipment including energy storage equipment, the reactive power adjustable range of the energy storage equipment is determined based on the rated capacity and current reactive power of the energy storage equipment.

[0092] For example, the adjustable range of reactive power compensation equipment can be determined based on its reactive power capacity (i.e., rated capacity), such as:

[0093] The reactive power adjustment range of the capacitor is 0 or Q. nk , where Q nk >0;

[0094] The reactive power adjustable range of the reactor is Q. nk Or 0, where Q nk <0;

[0095] The reactive power capacity of devices such as SVG, STATCOM, or synchronous condensers is Q. nk The adjustable range of reactive power is -Q. nk ~Q nk .

[0096] The reactive power adjustment range of new energy power generation equipment and energy storage equipment is determined based on their current reactive power and rated capacity (also known as maximum output, including active capacity and reactive capacity). For example, the rated capacity of new energy power generation equipment and energy storage equipment is S. nk Its reactive power adjustable range is That is, the reactive power after regulation by new energy power generation equipment and energy storage equipment must meet the following requirements. Understandably, if the reactive power of new energy power generation equipment or energy storage equipment is adjusted, its active power must be adjusted simultaneously. Where, θ imin The minimum power factor requirement is a minimum standard set for the power factor to ensure the efficiency of the power system and reduce power loss. It represents the minimum allowable power factor of the transmission and transformation equipment i connected to each target monitoring point in the new power system.

[0097] Step 140: Determine the rationality of the reactive power adjustment of the new power system at the previous moment based on the current voltage and reactive power of the power transmission and transformation equipment connected to each target monitoring point.

[0098] It should be noted that the rationality of reactive power regulation in the new power system specifically includes:

[0099] At the same time, the real-time reactive power Q′ of reactive power compensation equipment (such as capacitors, reactors, SVG, STATCOM, synchronous condensers, etc.) should be ensured. tnk Both are positive or negative values, and the reactive power regulation ΔQ′ nk Keep in the same direction.

[0100] In the new power system, the voltage and power factor of the transmission and transformation equipment i′ connected to each target monitoring point are within the acceptable range at time j, i.e. and In such cases, the reactive power adjustment of reactive power adjustable equipment should be kept in the same direction.

[0101] in, Let i′ be the voltage of the power transmission and transformation equipment connected to each target monitoring point at time j, (V i′min V i，max V represents the permissible voltage range for the power transmission and transformation equipment i′ connected to each target monitoring point. i′min V is the minimum value within the acceptable voltage range. i′max This refers to the maximum voltage value within the acceptable voltage range. Let θ be the power factor of the transmission and transformation equipment i′ connected to each target monitoring point at time j. i′min This is the minimum value within the acceptable range of power factor.

[0102] Step 150: If the reactive power adjustment in the previous moment is reasonable, determine the reactive power adjustment amount of the reactive power adjustable equipment based on the loss rate of change, the voltage change value per unit capacity, the configuration parameters, the current operating data, and the reactive power adjustable range.

[0103] The loss rate of change reflects the impact of reactive power regulation by reactive power adjustable equipment on the change of active power loss in the new power system.

[0104] The voltage change per unit capacity reflects the impact of reactive power regulation by reactive power adjustable equipment on the voltage level of the new power system.

[0105] If the reactive power adjustment was reasonable in the previous moment, that is, the real-time reactive power of the reactive power compensation equipment was positive or negative, the reactive power adjustment amount was in the same direction, and the voltage and power factor of the power transmission and transformation equipment connected to each target monitoring point were within the qualified range, the reactive power adjustment amount of the reactive power adjustable equipment can be further determined based on the loss change rate, the voltage change value per unit capacity, the configuration parameters, the current operating data, and the reactive power adjustable range.

[0106] Step 160: Transmit the reactive power adjustment amount to each reactive power adjustable device to perform reactive power control.

[0107] After determining the reactive power regulation amount, the reactive power regulation amount is transmitted to the corresponding reactive power adjustable equipment to perform reactive power control, such as adjusting the switching status of capacitor banks, controlling the output of SVG or STATCOM, etc., thereby achieving precise and reliable control of voltage and reactive power in the new power system.

[0108] In the above embodiments, the current operating data of the transmission and transformation equipment and reactive power adjustable equipment connected to each target monitoring point of the new power system are obtained. The loss rate of change and the voltage change value per unit capacity are determined based on the configuration parameters and operating data of the transmission and transformation equipment and reactive power adjustable equipment. The reactive power adjustable range is determined based on the rated capacity and / or current reactive power of the reactive power adjustable equipment. If the reactive power adjustment is reasonable at the previous moment, the reactive power adjustment amount is determined based on the loss rate of change, the voltage change value per unit capacity, the configuration parameters, the current operating data, and the reactive power adjustable range. The adjustment amount is transmitted to the reactive power adjustable equipment to perform reactive power control, thereby realizing global voltage and reactive power adaptive control of the new power system, optimizing the reactive power distribution of the system, avoiding unreasonable reactive power adjustment, and improving the stability and reliability of system operation.

[0109] In one embodiment of this application, the loss rate of change is determined based on the configuration parameters of the power transmission and transformation equipment and the reactive power adjustable equipment connected to each target monitoring point, as well as the current operating data, including:

[0110] Based on the active power, reactive power, voltage, and impedance of the power transmission and transformation equipment connected to each target monitoring point before the reactive power adjustable equipment is put into operation, the reference power loss of the new power system is determined.

[0111] Based on the active power, reactive power, voltage and impedance of the power transmission and transformation equipment connected to each target monitoring point after the reactive power adjustable equipment is put into operation, as well as the amount of active power occupied by the reactive power of each reactive power adjustable equipment, the input power loss after the reactive power adjustable equipment is put into operation is determined.

[0112] The loss variation rate is determined based on the baseline power loss, the input power loss, and the increase in reactive power due to the input of reactive power adjustable equipment.

[0113] It should be noted that the specific calculation process for the lossy rate of change includes:

[0114] Based on the active power corresponding to the transmission and transformation equipment i connected to each target monitoring point before the reactive power adjustable device k is put into operation. reactive power Voltage and impedance R i Determine the baseline power loss loss of the new power system. NB :

[0115]

[0116] Where m is the number of power transmission and transformation equipment i connected to each target monitoring point.

[0117] It is understandable that in the above formula, through Calculate the sum of the squares of active power and reactive power (i.e., the square of apparent power), and sum it with the square of voltage. Divide by the impedance R of the power transmission and transformation equipment connected to the i-th target monitoring point. i The power loss of the transmission and transformation equipment connected to the i-th target monitoring point is obtained. The power loss of the transmission and transformation equipment connected to all target monitoring points is summed to obtain the reference power loss of the new power system.

[0118] The new power system uses the active power P corresponding to the transmission and transformation equipment i connected to each target monitoring point after the reactive power adjustable device k is put into operation. ijk Reactive power Q ijk Voltage V ijk and impedance R i And the amount of active power occupied by reactive power of each reactive power adjustable device, P lossk Determine the input power loss (Loss) after the reactive power adjustable equipment is put into operation. NLk :

[0119]

[0120] Where m is the number of power transmission and transformation equipment i connected to each target monitoring point.

[0121] Understandably, after the reactive power adjustable equipment is put into operation, it changes the active power P of the power transmission and transformation equipment i connected to each target monitoring point. ijk and reactive power Q ijk P lossk It is the amount of active power occupied by each reactive power adjustable device k after reactive power is put into operation.

[0122] It is understandable that when reactive power adjustable equipment uses reactive power compensation equipment (such as capacitors, reactors, SVG, STATCOM, synchronous condensers, etc.), its corresponding P lossk =0. When the reactive power adjustable equipment adopts new energy power generation equipment or energy storage equipment, its corresponding... in, Q' is the reactive power before the adjustable reactive power device k is put into operation. k It is the reactive power increase caused by the activation of the adjustable reactive power device k. This refers to the active power before the adjustable reactive power device k is put into operation. The above method is used to calculate the active power loss caused by changes in reactive power after the new energy power generation equipment or energy storage equipment is put into operation.

[0123] It should be noted that the input power loss after the reactive power adjustable equipment is put into operation needs to be calculated separately for different types of reactive power adjustable equipment.

[0124] Based on the baseline power loss Loss NB Input power loss Loss NLk And the increase in reactive power Q' due to the commissioning of reactive power adjustable equipment k Determine the lossy rate of change Γ k :

[0125] Lossy rate of change Γ k The reactive power input of the adjustable reactive power device is Q'. k Under these circumstances, the rate of change of active power loss in the new power system, expressed in MW / MVar, is calculated as follows:

[0126]

[0127] Understandably, the lossy rate of change Γ k Γ is the ratio of the power loss difference before and after reactive power is input by the reactive power adjustable device to the reactive power input by the reactive power adjustable device. When the reactive power of the reactive power adjustable device k increases while the active power loss of the new power system decreases, Γ... k >0; conversely, Γ k <0.

[0128] In the above embodiments, before the adjustable reactive power equipment is put into operation, the baseline power loss of the new power system is calculated based on the active power, reactive power, voltage, and impedance of the transmission and transformation equipment connected to each target monitoring point. After the adjustable reactive power equipment is put into operation, the active power loss after the equipment is put into operation is calculated based on the same parameters and the reactive power of the adjustable reactive power equipment relative to the active power. The loss change rate is then calculated based on the baseline power loss, the power loss after operation, and the increase in reactive power by the adjustable reactive power equipment. The loss change rate can be used to determine the reactive power adjustment amount of the adjustable reactive power equipment, thereby optimizing the reactive power distribution of the system and avoiding unreasonable reactive power adjustment.

[0129] In one embodiment of this application, the voltage change per unit capacity is determined based on the configuration parameters of the power transmission and transformation equipment and the reactive power adjustable equipment connected to each target monitoring point, as well as the current operating data, including:

[0130] Based on the voltage of the transmission and transformation equipment connected to each target monitoring point in the new power system before the reactive power adjustable equipment is put into operation, the voltage of the transmission and transformation equipment connected to each target monitoring point in the new power system after the reactive power adjustable equipment is put into operation, and the reactive power increased by the reactive power adjustable equipment, the unit capacity voltage change value after the reactive power adjustable equipment is put into operation in the new power system is determined.

[0131] Based on the voltage of the transmission and transformation equipment X connected to each target monitoring point in the new power system before the reactive power adjustable device k is put into operation, the voltage of the new power system is calculated. After the reactive power adjustable device k is put into operation, the voltage V of the transmission and transformation equipment X connected to each target monitoring point in the new power system is... Xjk And the increased reactive power Q' due to the addition of adjustable reactive power equipment k Determine the unit capacity voltage change ΔV after each reactive power adjustable device k in the new power system is put into operation. k :

[0132]

[0133] In the above formula, This represents the change in voltage of the transmission and transformation equipment X connected to each target monitoring point before and after the reactive power adjustable device k is put into operation, divided by the increase in reactive power Q' due to the activation of the reactive power adjustable device k. k The change in voltage per unit capacity, ΔV, is obtained. k This reflects the impact of reactive power changes of the adjustable reactive power equipment on the voltage of the transmission and transformation equipment connected to each target monitoring point in the new power system. That is, the voltage will change accordingly for every certain amount of reactive power input.

[0134] In the above embodiments, based on the voltage of the transmission and transformation equipment connected to each target monitoring point in the new power system before and after the activation of the reactive power adjustable equipment, and the increase in reactive power due to the activation of the reactive power adjustable equipment, the unit capacity voltage change value after the activation of each reactive power adjustable equipment in the new power system is determined. The unit capacity voltage change value can be used to determine the reactive power adjustment amount of the reactive power adjustable equipment, thereby optimizing the reactive power distribution of the system and avoiding unreasonable reactive power adjustment.

[0135] In one embodiment of this application, the method further includes:

[0136] If the reactive power adjustment in the previous moment was unreasonable, the reactive power of the target reactive power adjustable equipment with unreasonable reactive power output is adjusted to make the reactive power output of the target reactive power adjustable equipment reasonable.

[0137] It is understandable that reactive power output refers to the reactive power actually provided by reactive power compensation equipment, new energy power generation equipment, or energy storage equipment. Reactive power can be positive, zero, or negative.

[0138] In some embodiments, adjusting the reactive power of a target reactive power adjustable device with unreasonable reactive power output includes:

[0139] When the reactive power output is unreasonable, it means that the current voltage of the power transmission and transformation equipment connected to the target monitoring point is greater than the maximum value of the voltage qualified range. In this case, the reactive power of the reactive power compensation equipment is reduced according to the negative value of the larger of the current reactive power and zero.

[0140] When the reactive power output is unreasonable, it means that the current voltage of the power transmission and transformation equipment connected to the target monitoring point is less than the minimum value of the voltage qualified range. In this case, the reactive power of the reactive power compensation equipment is increased according to the negative value of the smaller of the current reactive power and zero.

[0141] Unreasonable reactive power output refers to the situation where the current power factor of the transmission and transformation equipment connected to the access point of the new energy power generation equipment or energy storage equipment is less than the minimum value of the qualified power factor range. The reactive power adjustment amount of the new energy power generation equipment or energy storage equipment is obtained based on the rated capacity of the new energy power generation equipment or energy storage equipment, the current power factor, and the minimum value of the qualified power factor range. The reactive power of the new energy power generation equipment or energy storage equipment is then adjusted based on the reactive power adjustment amount.

[0142] For example, the voltage of the power transmission and transformation equipment i′ connected to the target monitoring point at time j. The maximum value V of the voltage acceptable range i，max ,Right now In this case, the reactive power of the target adjustable reactive power device needs to be reduced, i.e., ΔQ′. nk<0, where priority is given to adjusting reactive power compensation equipment such as capacitors, reactors, SVG, STATCOM, and synchronous condensers, with a corresponding reactive power adjustment amount ΔQ′. nk For ΔQ′ nk =-max(0, Q') tnk ), where Q' tnk The real-time reactive power of the reactive power adjustable equipment;

[0143] The voltage of the power transmission and transformation equipment i′ connected to the target monitoring point at time j is less than the minimum acceptable voltage value, i.e. In this case, the reactive power of the target reactive power adjustable equipment needs to be increased, i.e., ΔQ′. nk >0, where priority is given to adjusting reactive power compensation equipment such as capacitors, reactors, SVG, STATCOM, and synchronous condensers, with a corresponding reactive power adjustment amount ΔQ′. nk For ΔQ′ nk =-min(0,Q') tnk );

[0144] The power factor of the transmission and transformation equipment i′ connected to the access point of the new energy power generation equipment or energy storage equipment at time j is less than the minimum value θ of the power factor qualified range. 1′min ,Right now In this case, adjust the reactive power of the new energy power generation equipment or energy storage equipment, with the reactive power adjustment amount being... And simultaneously adjust its active power to in, The power factor θ of transmission and transformation equipment i connected to the access point of new energy power generation equipment or energy storage equipment at time j. i′min This is the minimum value within the acceptable range of power factor.

[0145] When the reactive power output is unreasonable because the voltage of the transmission and transformation equipment connected to the target monitoring point is outside the acceptable range, the reactive power of the reactive power compensation equipment will be adjusted accordingly. For transmission and transformation equipment connected to new energy power generation equipment or energy storage equipment, if the power factor is outside the acceptable range, the reactive power of the new energy power generation equipment or energy storage equipment will be adjusted according to the calculated reactive power adjustment amount, and the corresponding active power will be adjusted simultaneously to bring the power factor back to the acceptable range.

[0146] In the above embodiments, the reactive power of the target reactive power adjustable equipment with unreasonable reactive power output is adjusted so that the reactive power output of the reactive power equipment is within a reasonable range, thereby optimizing the reactive power distribution of the new power system and avoiding unreasonable reactive power regulation.

[0147] In one embodiment of this application, assuming the reactive power adjustment at the previous moment is reasonable, the reactive power adjustment amount of the reactive power adjustable device is determined based on the loss rate of change, the voltage change per unit capacity, configuration parameters, current operating data, and the reactive power adjustable range, including:

[0148] Given that the reactive power adjustment was reasonable in the previous moment and the current voltage is within the acceptable voltage range, the reactive power adjustment amount of the reactive power adjustable equipment is determined based on the loss rate of change, the voltage change value per unit capacity, configuration parameters, current operating data, and the reactive power adjustable range.

[0149] If the reactive power adjustment in the previous moment was reasonable and the current voltage is less than the minimum value of the voltage acceptable range, adjust the current voltage to the voltage acceptable range, and determine the reactive power adjustment amount of the reactive power adjustable equipment based on the loss change rate, the voltage change value per unit capacity, the configuration parameters, the current operating data and the reactive power adjustable range.

[0150] If the reactive power adjustment in the previous moment was reasonable and the current voltage is greater than the maximum value of the voltage acceptable range, adjust the current voltage to the voltage acceptable range, and determine the reactive power adjustment amount of the reactive power adjustable equipment based on the loss rate of change, the voltage change value per unit capacity, the configuration parameters, the current operating data, and the reactive power adjustable range.

[0151] In the above embodiments, if the reactive power adjustment at the previous moment is reasonable and the current voltage is within the acceptable voltage range, the reactive power adjustment amount of the reactive power adjustable device is determined based on the loss rate of change, the voltage change value per unit capacity, configuration parameters, current operating data, and the reactive power adjustable range. If the reactive power adjustment at the previous moment is reasonable and the current voltage is not within the acceptable voltage range, the current voltage is first adjusted to the acceptable voltage range, and then the reactive power adjustment amount of the reactive power adjustable device is determined. This achieves global voltage and reactive power adaptive control of the new power system, optimizes the reactive power distribution of the system, avoids unreasonable reactive power adjustment, and improves the stability and reliability of system operation.

[0152] In one embodiment of this application, the reactive power adjustment amount of the reactive power adjustable device is determined based on the lossy rate of change, the voltage change per unit capacity, configuration parameters, current operating data, and the reactive power adjustable range, including:

[0153] Calculate the ratio of the loss rate of change to the voltage change per unit capacity for each reactive power adjustable device;

[0154] The reactive power adjustable devices are sorted in descending order of their ratios to form the first sequence. The first minimum number of reactive power adjustable devices that ensures the adjusted voltage of the power transmission and transformation equipment connected to each target monitoring point is within the optimal voltage range and the power factor is within the qualified range is calculated.

[0155] Based on the maximum reactive power value of the reactive power adjustable range corresponding to the first reactive power adjustable device, the reactive power adjustment amount of the first reactive power adjustable device is determined. The first reactive power adjustable device is the reactive power adjustable device in the first sequence whose serial number is less than the first minimum value.

[0156] The reactive power adjustment amount of the reactive power adjustable device whose serial number in the first sequence is equal to the first minimum value is determined based on the optimal voltage range and whether the reactive power adjustable device can be continuously adjusted.

[0157] The voltage V′ of the power transmission and transformation equipment i′ connected to each target monitoring point. i′j and power factor θ′ i′j Within the acceptable range, i.e., V′ i′j ∈[V i′min V i′max ],|θ′ i′j |∈[θ i‘min In the case of [1], calculate the loss rate Γ of each reactive power adjustable device k. k The ratio F(n) is obtained by taking the ratio of the voltage change per unit capacity ΔVk to the voltage change per unit capacity:

[0158] F(n)=Γ k / ΔV k

[0159] Sort the reactive power adjustable devices in descending order of their ratio F(n) to form the first sequence Y(n):

[0160] Y(1) = max[F(n)]

[0161] Calculate the first minimum value N = min(n) of the number of reactive power adjustable devices that ensure the adjusted voltage of the power transmission and transformation equipment i′ connected to each target monitoring point is within the optimal voltage range and the power factor is within the acceptable range.

[0162] That is, the adjusted voltage of the power transmission and transformation equipment i′ connected to each target monitoring point should meet the following requirements:

[0163]

[0164] Among them, Q nkmax Q″ is the maximum value of the adjustable range of the nth reactive resource k. tnk Let be the reactive power of the nth reactive resource k at time t. is the optimal voltage range, which is the voltage operation range of the power transmission and transformation equipment i' connected to each target monitoring point with a certain margin for voltage over-limit, and is a voltage range further optimized based on the voltage qualified range [V i′min , V i′max . The range is smaller than the corresponding voltage qualified range.

[0165] In the above formula, when the superscript exponent of the summation operation is N - 1, the adjusted voltage of the power transmission and transformation equipment i' connected to each target monitoring point cannot be within the optimal voltage range, that is, the first minimum value of N as the number of reactive power adjustable devices is determined.

[0166] The adjusted power factor of the power transmission and transformation equipment i' connected to each target monitoring point should satisfy:

[0167] |θ' i′inew | ∈ (θ i，min , 1]

[0168] where θ' i′inew is the adjusted power factor of the power transmission and transformation equipment i' connected to each target monitoring point.

[0169] Adjust the reactive power Q″ tnk of all the first reactive power adjustable devices k with n < N in the first sequence Y(n) to the maximum reactive power Q nkmax within the corresponding reactive power adjustable range. nkmax .

[0170] The reactive power of the reactive power adjustable device with the serial number equal to the first minimum value, that is, n = N, in the first sequence is determined by the optimal voltage range and whether the reactive power adjustable device can be continuously adjusted.

[0171] If the reactive power adjustable device can be continuously adjusted, the reactive power adjustment amount is:

[0172]

[0173] If the reactive power adjustable device cannot be continuously adjusted, the reactive power adjustment amount is Q nkmax , that is, the maximum value of the reactive power adjustable range of the reactive power adjustable device. nkmax

[0174] It can be understood that for the reactive power adjustable device whose active power loss of the new power system will decrease under the condition of reducing reactive power capacity (lowering reactive power); or for the reactive power adjustable device whose active power loss of the new power system will increase under the condition of increasing reactive power capacity (raising reactive power), the reactive power of this reactive power adjustable device needs to be lowered to 0.

[0175] Specifically, if the voltage of the power transmission and transformation equipment connected to each target monitoring point meets the requirements, and the reactive power of the new energy power generation equipment and energy storage equipment is relatively large, increasing the reactive power of the new energy power generation equipment and energy storage equipment will lead to the reactive power of the new energy power generation equipment and energy storage equipment occupying a certain amount of active power P. lossk >0 and lossy rate of change Γ k Since the reactive power of new energy power generation equipment and energy storage equipment is less than 0, the reactive power of new energy power generation equipment and energy storage equipment should be reduced first, while the active power of new energy power generation equipment and energy storage equipment should be increased.

[0176] For reactive power adjustable devices that reduce active power loss when reactive capacity is reduced (reduced reactive power), their reactive power should be increased first when active power loss is reduced when reactive capacity is reduced (reduced reactive power). This increase is achieved by adjusting the reactive power capacity Q′ of reactive power adjustable device k when it is put into operation. k >0 and lossy rate of change Γ k When the value is greater than 0, the adjustment priority of the reactive power adjustable equipment is lower.

[0177] In the above embodiments, the reactive power adjustable devices are sorted according to the ratio of the loss rate of the reactive power adjustable devices to the voltage change value per unit capacity, and the minimum number of reactive power adjustable devices that can keep the adjusted voltage and power factor of the transmission and transformation equipment connected to the target monitoring point within the qualified range is determined. The reactive power adjustment amount is determined based on the maximum value of the reactive power adjustable range of the first reactive power adjustable device. For the reactive power adjustable device whose serial number is equal to the first minimum value in the first sequence, its reactive power adjustment amount is determined by the optimal voltage range and whether the device can be continuously adjusted. This achieves the minimization of the number of reactive power adjustable devices, reasonable adjustment of the reactive power of the reactive power adjustable devices, realization of global voltage and power factor control of the new power system, optimization of the reactive power distribution of the system, avoidance of unreasonable reactive power adjustment, and improvement of the stability and reliability of system operation.

[0178] In one embodiment of this application, if the reactive power adjustment at the previous moment is reasonable and the current voltage is less than the minimum value of the voltage acceptable range, adjusting the current voltage to the voltage acceptable range includes:

[0179] Calculate the sum of the loss rate of change and the voltage change per unit capacity for each reactive power adjustable device;

[0180] The reactive power adjustable devices are sorted in descending order to form a second sequence, and the second minimum number of reactive power adjustable devices that make the adjusted voltage of the power transmission and transformation equipment connected to each target monitoring point greater than or equal to the minimum value of the voltage qualified range is calculated.

[0181] Adjust the reactive power of the second reactive power adjustable device to the maximum reactive power value of the reactive power adjustable range corresponding to the second reactive power adjustable device. The second reactive power adjustable device is the reactive power adjustable device in the second sequence whose serial number is less than or equal to the second minimum value.

[0182] The voltage V of the power transmission and transformation equipment i′ connected to each target monitoring point i′，j Less than the minimum value V of the voltage acceptable range i′mi n, i.e., V′ i，j <V i′min In the case of [condition], calculate the sum R(n) of the loss rate of change Γk of each reactive power adjustable device k and the voltage change per unit capacity ΔVk:

[0183] R(n)=Γ k +ΔV k

[0184] Sort the reactive power adjustable devices k in descending order of their sums R(n) to form the second sequence M(n):

[0185] M(1) = maxR(n)

[0186] Calculate the second minimum value N = min(n) of the number of reactive power adjustable devices that ensure the adjusted voltage of the power transmission and transformation equipment i′ connected to each target monitoring point is greater than or equal to the minimum value of the voltage qualified range.

[0187] That is, the adjusted voltage of the power transmission and transformation equipment i′ connected to each target monitoring point should meet the following requirements:

[0188]

[0189] Among them, Q nkmax Q″ is the maximum value of the adjustable range of the nth reactive resource k. tnk Let V be the reactive power of the nth reactive resource k at time t. i′min V i′max V represents the permissible voltage range for the power transmission and transformation equipment i′ connected to each target monitoring point. i′min This is the minimum value within the acceptable voltage range.

[0190] In the above formula, when the superscript exponent of the summation operation is N-1, the adjusted voltage of the power transmission and transformation equipment i′ connected to each target monitoring point cannot be greater than or equal to the minimum value of the voltage qualified range, thus determining N as the second minimum value of the number of reactive power adjustable equipment.

[0191] Adjust the reactive power of all second reactive power adjustable devices in the second sequence M(n) with n≤N to Q. nkmax That is, the maximum reactive power within the adjustable reactive power range.

[0192] In the above embodiments, the reactive power adjustable devices are sorted into a second sequence based on the sum of the loss rate of reactive power adjustable devices and the voltage change value per unit capacity. The minimum number of reactive power adjustable devices that can make the voltage reach the minimum value of the qualified range is determined as the second minimum value. The reactive power of the reactive power adjustable devices with serial numbers less than the second minimum value is adjusted to the maximum reactive power value of the reactive power adjustable range. The current voltage is first adjusted to the qualified voltage range, thereby realizing the voltage control of the new power system, optimizing the reactive power distribution of the system, avoiding unreasonable reactive power adjustment, and improving the stability and reliability of system operation.

[0193] In one embodiment of this application, if the reactive power adjustment at the previous moment is reasonable and the current voltage is greater than the maximum value of the voltage acceptable range, adjusting the current voltage to the voltage acceptable range includes:

[0194] The first function is determined based on the voltage change per unit capacity and the loss rate of change of reactive power adjustable equipment.

[0195] The reactive power adjustable devices are sorted in descending order according to the first function to form a third sequence, and the third minimum value of the number of reactive power adjustable devices that makes the adjusted voltage of the power transmission and transformation equipment connected to each target monitoring point less than or equal to the maximum value of the voltage qualified range is calculated.

[0196] Adjust the reactive power of the third reactive power adjustable device to the minimum reactive power value of the reactive power adjustable range corresponding to the third reactive power adjustable device. The third reactive power adjustable device is the reactive power adjustable device in the third sequence whose serial number is less than or equal to the third minimum value.

[0197] The voltage V′ of the power transmission and transformation equipment i′ connected to each target monitoring point. i′j The maximum value V of the voltage acceptable range i′max That is, V′ i，j >V i，max In this case, based on the voltage change per unit capacity ΔV k R(n) determines the first function 2*ΔV k -R(n), where R(n) is the lossy rate of change Γ of the reactive power adjustable device k. k With unit capacity voltage change ΔV k The sum (R(n)=Γ) k +ΔV k );

[0198] According to the first function 2*ΔV k -R(n) sorts the reactive power adjustable devices in descending order to form a third sequence M′(n):

[0199] M′(1)=max[2*ΔVk -R(n)]

[0200] Calculate the third minimum value N = min(n) of the number of reactive power adjustable devices that ensure the adjusted voltage of the power transmission and transformation equipment i′ connected to each target monitoring point is less than or equal to the maximum value of the voltage qualified range.

[0201] That is, the adjusted voltage of the power transmission and transformation equipment i′ connected to each target monitoring point should meet the following requirements:

[0202]

[0203] Among them, Q nkmax Q″ is the maximum value of the adjustable range of the nth reactive resource k. tnk Let V be the reactive power of the nth reactive resource k at time t. i′min V i′max V represents the permissible voltage range for the power transmission and transformation equipment i′ connected to each target monitoring point. i′max This represents the maximum voltage value within the acceptable voltage range.

[0204] In the above formula, when the superscript exponent of the summation operation is N-1, the adjusted voltage of the power transmission and transformation equipment i′ connected to each target monitoring point cannot be less than or equal to the maximum value of the voltage qualified range, thus determining N as the third minimum value of the number of reactive power adjustable equipment.

[0205] Adjust the reactive power of all third reactive power adjustable devices with n≤N in the third sequence M′(n) to Q. nkmin This refers to the minimum reactive power within the adjustable reactive power range.

[0206] In the above embodiments, a first function is determined based on the unit capacity voltage change value and loss rate of the reactive power adjustable equipment. The reactive power adjustable equipment is then sorted from largest to smallest according to the first function to form a third sequence. The minimum number of reactive power adjustable equipment that can adjust the voltage to the maximum value of the qualified range is calculated as the third minimum value. The reactive power of the reactive power adjustable equipment with a sequence number less than the third minimum value is adjusted to the minimum reactive power value of the reactive power adjustable range. The current voltage is first adjusted to the qualified voltage range, thereby realizing the voltage control of the new power system, optimizing the reactive power distribution of the system, avoiding unreasonable reactive power adjustment, and improving the stability and reliability of system operation.

[0207] In one embodiment of this application, taking a new type of power system connected to the 220kV grid (where both new energy power generation equipment and energy storage equipment can generate reactive power) as an example, the preferred voltage range is set to [221.5kV, 233kV]. The configuration parameters and current operating data of the new power system are shown in Table 1.

[0208] Table 1. Configuration parameters and current operating data of the new power system

[0209]

[0210] As shown in Table 2, the loss rate and unit capacity voltage change value are determined based on the configuration parameters of the power transmission and transformation equipment and the reactive power adjustable equipment connected to each target monitoring point and the current operating data.

[0211] Determine the reactive power adjustable range of the reactive power adjustable equipment based on its rated capacity and / or current reactive power.

[0212] When the voltage of the transmission and transformation equipment connected to each target monitoring point in the new power system is lower than the maximum voltage within the acceptable voltage range, ΔQ' is calculated. 2k =6MVar, ΔQ' 2k This is the reactive power adjustment of reactor 2, the second reactive power adjustable device. Since the reactive power of other reactive power adjustable devices is 0, reactor 2 needs to be increased by 6 MVar. Based on the power factor requirement, ΔQ' is calculated. 7k = -5MVar, ΔQ' 7k The reactive power adjustment required for the 7th adjustable reactive power device, the wind turbine, is that the reactive power of the wind turbine needs to be reduced by 5MVa. r .

[0213] Table 2 Data Table of Reactive Power Adjustable Equipment in New Power Systems

[0214]

[0215]

[0216] Under the condition that the voltage and power factor of the transmission and transformation equipment connected to each target monitoring point in the new power system are within the qualified range, the reactive power adjustable equipment with a loss change rate of less than 0 is first adjusted down, that is, the reactive power output of wind power, photovoltaic and energy storage that have a greater impact on active power loss is adjusted to 0. In order to achieve voltage balance, the capacitor, SVG, energy storage, wind power and photovoltaic are adjusted up in sequence according to the first sequence to obtain the reactive power of each reactive power adjustable equipment. After adjustment, the voltage is 221.5kV, which is within the optimal voltage range of the transmission and transformation equipment connected to each target monitoring point in the new power system.

[0217] The voltage reactive power control method provided in this application can be executed by a voltage reactive power control device. This application uses the example of a voltage reactive power control device executing the voltage reactive power control method to illustrate the voltage reactive power control device provided in this application.

[0218] Figure 2 This is a schematic diagram of the structure of a voltage reactive power control device provided in some embodiments of this application. For example... Figure 2 As shown, the voltage reactive power control device 200 includes:

[0219] The acquisition unit 201 is used to acquire the current operating data of the power transmission and transformation equipment and reactive power adjustable equipment connected to each target monitoring point in the new power system.

[0220] The first determining unit 202 is used to determine the loss rate of change and the voltage change value per unit capacity based on the configuration parameters of the power transmission and transformation equipment and the reactive power adjustable equipment connected to each target monitoring point and the current operating data.

[0221] The second determining unit 203 is used to determine the reactive power adjustable range of the reactive power adjustable equipment based on the reactive power capacity and the current reactive power of the reactive power adjustable equipment.

[0222] The third determining unit 204 is used to determine the rationality of the reactive power adjustment of the new power system in the previous moment based on the current voltage and current reactive power of the power transmission and transformation equipment connected to each target monitoring point.

[0223] The fourth determining unit 205 is used to determine the reactive power adjustment amount of the reactive power adjustable equipment based on the loss rate of change, the voltage change value per unit capacity, the configuration parameters, the current operating data, and the reactive power adjustable range, provided that the reactive power adjustment in the previous moment is reasonable.

[0224] The execution unit 206 is used to transmit the reactive power adjustment amount to each reactive power adjustable device to perform reactive power control.

[0225] Optionally, the first determining unit 202 is used for:

[0226] Based on the active power, reactive power, voltage, and impedance of the power transmission and transformation equipment connected to each target monitoring point before the reactive power adjustable equipment is put into operation, the reference power loss of the new power system is determined.

[0227] Based on the active power, reactive power, voltage and impedance of the power transmission and transformation equipment connected to each target monitoring point after the reactive power adjustable equipment is put into operation, as well as the amount of active power occupied by the reactive power of each reactive power adjustable equipment, the input power loss after the reactive power adjustable equipment is put into operation is determined.

[0228] The loss variation rate is determined based on the baseline power loss, the input power loss, and the increase in reactive power due to the input of reactive power adjustable equipment.

[0229] Optionally, the first determining unit 202 is used for:

[0230] Based on the voltage of the transmission and transformation equipment connected to each target monitoring point in the new power system before the reactive power adjustable equipment is put into operation, the voltage of the transmission and transformation equipment connected to each target monitoring point in the new power system after the reactive power adjustable equipment is put into operation, and the reactive power increased by the reactive power adjustable equipment, the unit capacity voltage change value after the reactive power adjustable equipment is put into operation in the new power system is determined.

[0231] Optionally, the reactive power adjustable device includes one or more of reactive power compensation devices, new energy power generation devices, and energy storage devices, and the second determining unit 203 is used for:

[0232] When the reactive power adjustable equipment includes reactive power compensation equipment, the reactive power adjustable range of the reactive power compensation equipment shall be determined according to the rated capacity of the reactive power compensation equipment.

[0233] In the case where the reactive power adjustable equipment includes new energy power generation equipment, the reactive power adjustable range of the new energy power generation equipment shall be determined based on the rated capacity and current reactive power of the new energy power generation equipment.

[0234] When the reactive power adjustable equipment includes energy storage equipment, the reactive power adjustable range of the energy storage equipment is determined based on the rated capacity and current reactive power of the energy storage equipment.

[0235] Optionally, the voltage reactive power control device 200 also includes an adjustment unit for:

[0236] If the reactive power adjustment in the previous moment was unreasonable, the reactive power of the target reactive power adjustable equipment with unreasonable reactive power output is adjusted to make the reactive power output of the target reactive power adjustable equipment reasonable.

[0237] Optionally, the adjustment unit is used for:

[0238] When the reactive power output is unreasonable, it means that the current voltage of the power transmission and transformation equipment connected to the target monitoring point is greater than the maximum value of the voltage qualified range. In this case, the reactive power of the reactive power compensation equipment is reduced according to the negative value of the larger of the current reactive power and zero.

[0239] When the reactive power output is unreasonable, it means that the current voltage of the power transmission and transformation equipment connected to the target monitoring point is less than the minimum value of the voltage qualified range. In this case, the reactive power of the reactive power compensation equipment is increased according to the negative value of the smaller of the current reactive power and zero.

[0240] Unreasonable reactive power output refers to the situation where the current power factor of the transmission and transformation equipment connected to the access point of the new energy power generation equipment or energy storage equipment is less than the minimum value of the qualified power factor range. The reactive power adjustment amount of the new energy power generation equipment or energy storage equipment is obtained based on the rated capacity of the new energy power generation equipment or energy storage equipment, the current power factor, and the minimum value of the qualified power factor range. The reactive power of the new energy power generation equipment or energy storage equipment is then adjusted based on the reactive power adjustment amount.

[0241] Optionally, the fourth determining unit 205 is used for:

[0242] Given that the reactive power adjustment in the previous moment was reasonable and the current voltage is within the acceptable voltage range, the reactive power adjustment amount of the reactive power adjustable equipment is determined based on the loss change rate, the voltage change value per unit capacity, the configuration parameters, the current operating data, and the reactive power adjustable range.

[0243] If the reactive power adjustment in the previous moment was reasonable and the current voltage is less than the minimum value of the voltage acceptable range, adjust the current voltage to the voltage acceptable range, and determine the reactive power adjustment amount of the reactive power adjustable equipment based on the loss change rate, the voltage change value per unit capacity, the configuration parameters, the current operating data and the reactive power adjustable range.

[0244] If the reactive power adjustment in the previous moment was reasonable and the current voltage is greater than the maximum value of the voltage acceptable range, adjust the current voltage to the voltage acceptable range, and determine the reactive power adjustment amount of the reactive power adjustable equipment based on the loss rate of change, the voltage change value per unit capacity, the configuration parameters, the current operating data, and the reactive power adjustable range.

[0245] Optionally, the fourth determining unit 205 is used for:

[0246] Calculate the ratio of the loss rate of change to the voltage change per unit capacity for each reactive power adjustable device;

[0247] The reactive power adjustable devices are sorted in descending order of their ratios to form the first sequence. The first minimum number of reactive power adjustable devices that ensures the adjusted voltage of the power transmission and transformation equipment connected to each target monitoring point is within the optimal voltage range and the power factor is within the qualified range is calculated.

[0248] Based on the maximum reactive power value of the reactive power adjustable range corresponding to the first reactive power adjustable device, the reactive power adjustment amount of the first reactive power adjustable device is determined. The first reactive power adjustable device is the reactive power adjustable device in the first sequence whose serial number is less than the first minimum value.

[0249] The reactive power adjustment amount of the reactive power adjustable device whose serial number is equal to the first minimum value in the first sequence is determined based on the optimal voltage range and whether the reactive power adjustable device can be continuously adjusted.

[0250] Optionally, the fourth determining unit 205 is used for:

[0251] Calculate the sum of the loss rate of change and the voltage change per unit capacity for each reactive power adjustable device;

[0252] The reactive power adjustable devices are sorted in descending order to form a second sequence, and the second minimum number of reactive power adjustable devices that make the adjusted voltage of the power transmission and transformation equipment connected to each target monitoring point greater than or equal to the minimum value of the voltage qualified range is calculated.

[0253] Adjust the reactive power of the second reactive power adjustable device to the maximum reactive power value of the reactive power adjustable range corresponding to the second reactive power adjustable device. The second reactive power adjustable device is the reactive power adjustable device in the second sequence whose serial number is less than or equal to the second minimum value.

[0254] Optionally, the fourth determining unit 205 is used for:

[0255] The first function is determined based on the voltage change per unit capacity and the loss rate of the reactive power adjustable equipment.

[0256] The reactive power adjustable devices are sorted in descending order according to the first function to form a third sequence, and the third minimum number of reactive power adjustable devices that make the adjusted voltage of the power transmission and transformation equipment connected to each target monitoring point less than or equal to the maximum value of the voltage qualified range is calculated.

[0257] Adjust the reactive power of the third reactive power adjustable device to the minimum reactive power value of the reactive power adjustable range corresponding to the third reactive power adjustable device. The third reactive power adjustable device is the reactive power adjustable device in the third sequence whose serial number is less than or equal to the third minimum value.

[0258] In the above embodiments, the voltage and reactive power control device acquires the current operating data of the power transmission and transformation equipment and the reactive power adjustable equipment connected to each target monitoring point of the new power system. Based on the configuration parameters and operating data of the power transmission and transformation equipment and the reactive power adjustable equipment, it determines the loss rate of change and the voltage change value per unit capacity. Based on the rated capacity and / or current reactive power of the reactive power adjustable equipment, it determines its reactive power adjustable range. If the reactive power adjustment is reasonable at the previous moment, it determines the reactive power adjustment amount based on the loss rate of change, the voltage change value per unit capacity, the configuration parameters, the current operating data, and the reactive power adjustable range. The adjustment amount is then transmitted to the reactive power adjustable equipment to execute reactive power control, thereby realizing global voltage and reactive power adaptive control of the new power system. This optimizes the reactive power distribution of the system, avoids unreasonable reactive power adjustment, and improves the stability and reliability of system operation.

[0259] The voltage and reactive power control device in this application embodiment can be an electronic device or a component within an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal or other devices besides a terminal. For example, the electronic device can be a mobile phone, tablet computer, laptop computer, PDA, in-vehicle electronic device, mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA), etc. It can also be a server, network attached storage (NAS), personal computer (PC), television (TV), ATM, or self-service machine, etc. This application embodiment does not specifically limit the specific device.

[0260] The voltage and reactive power control device in this application embodiment can be a device with an operating system. This operating system can be a Microsoft (Windows) operating system, an Android operating system, an iOS operating system, or other possible operating systems; this application embodiment does not specifically limit it.

[0261] The voltage and reactive power control device provided in this application embodiment can realize the various processes implemented in the voltage and reactive power control method embodiment, and will not be described again here to avoid repetition.

[0262] In some embodiments, such as Figure 3 As shown, this application embodiment also provides an electronic device 300, including a processor 301, a memory 302, and a computer program stored in the memory 302 and executable on the processor 301. When the program is executed by the processor 301, it implements the various processes of the above-described voltage reactive power control method embodiment and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0263] It should be noted that the electronic devices in the embodiments of this application include the aforementioned mobile electronic devices and non-mobile electronic devices.

[0264] This application also provides a non-transitory computer-readable storage medium storing a computer program. When the computer program is executed by a processor, it implements the various processes of the above-described voltage reactive power control method embodiments and achieves the same technical effect. To avoid repetition, it will not be described again here.

[0265] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0266] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the above-described voltage reactive power control method.

[0267] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0268] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface and the processor are coupled. The processor is used to run programs or instructions to implement the various processes of the above-described voltage reactive power control method embodiments and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0269] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0270] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0271] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods of the various embodiments of this application.

[0272] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

[0273] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0274] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A voltage reactive power control method, characterized in that, include: Acquire the current operating data of power transmission and transformation equipment and reactive power adjustable equipment connected to each target monitoring point in the new power system; Based on the configuration parameters of the power transmission and transformation equipment and reactive power adjustable equipment connected to each target monitoring point, as well as the current operating data, the loss rate of change and the voltage change value per unit capacity are determined. The reactive power adjustable range of the reactive power adjustable device is determined based on the rated capacity and / or current reactive power of the reactive power adjustable device. Based on the current voltage and current reactive power of the power transmission and transformation equipment connected to each target monitoring point, determine the rationality of the reactive power adjustment of the new power system at the previous moment; If the reactive power adjustment in the previous moment is reasonable, the reactive power adjustment amount of the reactive power adjustable device is determined based on the loss rate of change, the voltage change value per unit capacity, the configuration parameters, the current operating data, and the reactive power adjustable range. The reactive power adjustment amount is transmitted to each reactive power adjustable device to perform reactive power control.

2. The voltage reactive power control method according to claim 1, characterized in that, The determination of the loss rate of change based on the configuration parameters of the power transmission and transformation equipment and the reactive power adjustable equipment connected to each target monitoring point, as well as the current operating data, includes: Based on the active power, reactive power, voltage, and impedance of the power transmission and transformation equipment connected to each target monitoring point before the reactive power adjustable equipment is put into operation, the reference power loss of the new power system is determined. Based on the active power, reactive power, voltage and impedance of the power transmission and transformation equipment connected to each target monitoring point after the reactive power adjustable equipment is put into operation, as well as the amount of active power occupied by the reactive power of each reactive power adjustable equipment, the input power loss after the reactive power adjustable equipment is put into operation is determined. The loss variation rate is determined based on the reference power loss, the input power loss, and the reactive power increase due to the input of the reactive power adjustable equipment.

3. The voltage reactive power control method according to claim 1, characterized in that, The step of determining the voltage change per unit capacity based on the configuration parameters of the power transmission and transformation equipment and the reactive power adjustable equipment connected to each target monitoring point, as well as the current operating data, includes: Based on the voltage of the transmission and transformation equipment connected to each target monitoring point in the new power system before the reactive power adjustable equipment is put into operation, the voltage of the transmission and transformation equipment connected to each target monitoring point in the new power system after the reactive power adjustable equipment is put into operation, and the reactive power increased by the reactive power adjustable equipment, the unit capacity voltage change value after the reactive power adjustable equipment is put into operation in the new power system is determined.

4. The voltage reactive power control method according to claim 1, characterized in that, The adjustable reactive power device includes one or more of reactive power compensation devices, new energy power generation devices, and energy storage devices. Determining the adjustable reactive power range of the adjustable reactive power device based on its rated capacity and / or current reactive power includes: When the reactive power adjustable device includes the reactive power compensation device, the reactive power adjustable range of the reactive power compensation device is determined according to the rated capacity of the reactive power compensation device. When the reactive power adjustable equipment includes the new energy power generation equipment, the reactive power adjustable range of the new energy power generation equipment is determined according to the rated capacity and current reactive power of the new energy power generation equipment. When the reactive power adjustable device includes the energy storage device, the reactive power adjustable range of the energy storage device is determined based on the rated capacity of the energy storage device and the current reactive power.

5. The voltage reactive power control method according to any one of claims 1-4, characterized in that, The method further includes: If the reactive power adjustment is unreasonable in the previous moment, the reactive power of the target reactive power adjustable device with unreasonable reactive power output is adjusted so as to make the reactive power output of the target reactive power adjustable device reasonable.

6. The voltage reactive power control method according to claim 5, characterized in that, The adjustment of reactive power of the target adjustable reactive power equipment with unreasonable reactive power output includes: When the reactive power output is unreasonable, it means that the current voltage of the power transmission and transformation equipment connected to the target monitoring point is greater than the maximum value of the voltage qualified range. In this case, the reactive power of the reactive power compensation equipment is reduced according to the negative value of the larger of the current reactive power and zero. When the reactive power output is unreasonable, it means that the current voltage of the power transmission and transformation equipment connected to the target monitoring point is less than the minimum value of the voltage qualified range. In this case, the reactive power of the reactive power compensation equipment is increased according to the negative value of the smaller of the current reactive power and zero. When the reactive power output is unreasonable, it means that the current power factor of the transmission and transformation equipment connected to the access point of the new energy power generation equipment or energy storage equipment is less than the minimum value of the qualified power factor range. The reactive power adjustment amount of the new energy power generation equipment or energy storage equipment is obtained according to the rated capacity of the new energy power generation equipment or energy storage equipment, the current power factor, and the minimum value of the qualified power factor range. The reactive power of the new energy power generation equipment or energy storage equipment is adjusted according to the reactive power adjustment amount.

7. The voltage reactive power control method according to any one of claims 1-6, characterized in that, Assuming the reactive power adjustment at the previous moment was reasonable, the reactive power adjustment amount of the adjustable reactive power device is determined based on the loss rate of change, the voltage change per unit capacity, configuration parameters, current operating data, and the adjustable reactive power range, including: If the reactive power adjustment in the previous moment was reasonable and the current voltage was within the acceptable voltage range, the reactive power adjustment amount of the reactive power adjustable device is determined based on the loss change rate, the voltage change value per unit capacity, the configuration parameters, the current operating data, and the reactive power adjustable range. If the reactive power adjustment in the previous moment is reasonable and the current voltage is less than the minimum value of the voltage acceptable range, adjust the current voltage to the voltage acceptable range, and determine the reactive power adjustment amount of the reactive power adjustable device based on the loss change rate, the voltage change value per unit capacity, the configuration parameters, the current operating data and the reactive power adjustable range. If the reactive power adjustment in the previous moment is reasonable and the current voltage is greater than the maximum value of the voltage acceptable range, the current voltage is adjusted to the voltage acceptable range, and the reactive power adjustment amount of the reactive power adjustable device is determined based on the loss change rate, the voltage change value per unit capacity, the configuration parameters, the current operating data, and the reactive power adjustable range.

8. The voltage reactive power control method according to claim 7, characterized in that, The step of determining the reactive power adjustment amount of the reactive power adjustable device based on the loss rate of change, the voltage change per unit capacity, configuration parameters, current operating data, and the reactive power adjustable range includes: Calculate the ratio of the loss rate of change to the voltage change per unit capacity for each reactive power adjustable device; The reactive power adjustable devices are sorted in descending order of the ratio to form a first sequence, and the first minimum number of reactive power adjustable devices that make the adjusted voltage of the power transmission and transformation equipment connected to each target monitoring point within the optimal voltage range and the power factor within the qualified range are calculated. Based on the maximum reactive power value of the reactive power adjustable range corresponding to the first reactive power adjustable device, the reactive power adjustment amount of the first reactive power adjustable device is determined. The first reactive power adjustable device is the reactive power adjustable device in the first sequence whose serial number is less than the first minimum value. The reactive power adjustment amount of the reactive power adjustable device whose serial number in the first sequence is equal to the first minimum value is determined based on the preferred voltage range and whether the reactive power adjustable device can be continuously adjusted.

9. The voltage reactive power control method according to claim 7, characterized in that, The step of adjusting the current voltage to the acceptable voltage range, given that the reactive power adjustment at the previous moment was reasonable and the current voltage is less than the minimum value of the acceptable voltage range, includes: Calculate the sum of the loss rate of change and the voltage change per unit capacity for each reactive power adjustable device; The reactive power adjustable devices are sorted in descending order to form a second sequence, and the second minimum number of reactive power adjustable devices that make the adjusted voltage of the power transmission and transformation equipment connected to each target monitoring point greater than or equal to the minimum value of the voltage qualified range is calculated. Adjust the reactive power of the second reactive power adjustable device to the maximum reactive power value of the reactive power adjustable range corresponding to the second reactive power adjustable device, wherein the second reactive power adjustable device is the reactive power adjustable device in the second sequence whose serial number is less than or equal to the second minimum value.

10. The voltage reactive power control method according to claim 7, characterized in that, When the reactive power adjustment at the previous moment was reasonable and the current voltage is greater than the maximum value of the voltage acceptable range, adjusting the current voltage to the voltage acceptable range includes: The first function is determined based on the unit capacity voltage change value and the lossy change rate of the reactive power adjustable equipment; The reactive power adjustable devices are sorted in descending order according to the first function to form a third sequence, and the third minimum value of the number of reactive power adjustable devices that makes the adjusted voltage of the power transmission and transformation equipment connected to each target monitoring point less than or equal to the maximum value of the voltage qualified range is calculated. Adjust the reactive power of the third adjustable reactive power device to the minimum reactive power value of the reactive power adjustable range corresponding to the third adjustable reactive power device, wherein the third adjustable reactive power device is the adjustable reactive power device in the third sequence whose serial number is less than or equal to the third minimum value.

11. A voltage reactive power control device, characterized in that, include: The acquisition unit is used to acquire the current operating data of the power transmission and transformation equipment and reactive power adjustable equipment connected to each target monitoring point in the new power system. The first determining unit is used to determine the loss rate of change and the voltage change per unit capacity based on the configuration parameters of the power transmission and transformation equipment and the reactive power adjustable equipment connected to each target monitoring point and the current operating data. The second determining unit is used to determine the reactive power adjustable range of the reactive power adjustable device based on the reactive power capacity and the current reactive power of the reactive power adjustable device. The third determining unit is used to determine the rationality of the reactive power adjustment of the new power system at the previous moment based on the current voltage and current reactive power of the power transmission and transformation equipment connected to each target monitoring point. The fourth determining unit is used to determine the reactive power adjustment amount of the reactive power adjustable device based on the loss rate of change, the voltage change value per unit capacity, the configuration parameters, the current operating data, and the reactive power adjustable range, provided that the reactive power adjustment in the previous moment is reasonable. An execution unit is used to transmit the reactive power adjustment amount to each reactive power adjustable device to perform reactive power control.

12. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the voltage reactive power control method as described in any one of claims 1-10.

13. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the voltage reactive power control method as described in any one of claims 1-10.

Images