Distribution area distributed photovoltaic regulation control method and related equipment

Abstract

The embodiment of the invention discloses a transformer area distributed photovoltaic regulation control method and related equipment, and the method comprises the steps: obtaining an active power scheduling value and a reactive power scheduling value according to a total power factor and a preset target power factor, carrying out the distribution of the active power scheduling value and the reactive power scheduling value, obtaining a distributed active power regulation value and a distributed reactive power regulation value, and carrying out the distribution of the active power regulation value and the reactive power regulation value. And the inverter performs photovoltaic adjustment according to the distributed active adjustment value and the distributed reactive adjustment value, so that active power regulation and reactive power regulation of distributed photovoltaic can be controlled in a centralized and efficient manner, and coordinated regulation of the distributed photovoltaic in a range can be realized while the regulation accuracy is ensured. The distributed photovoltaic power generation capacity is maximized, the reliability and stability of photovoltaic power generation and power utilization of a power grid are improved, and the supply and demand balance of the power grid is kept.

Description

[Technical field]

[0001] The present invention relates to the field of photovoltaic regulation technology, and in particular to a distributed photovoltaic regulation control method and related equipment in an area. [Background technology]

[0002] With the rapid development of renewable energy, the scale of distributed photovoltaic access continues to grow; however, traditional distribution networks are often unable to effectively manage large-scale distributed photovoltaic access, which makes the distribution network face the need for fine-tuning distributed photovoltaics, including active power and reactive power, to adapt to changes in distribution network loads and improve power supply quality. However, due to the large number and wide distribution of distributed photovoltaic groups, the existing control methods cannot coordinate large-scale active and reactive power regulation, and thus cannot maintain the balance of supply and demand in the power grid. [Summary of the invention]

[0003] In view of this, the present invention provides a distributed photovoltaic regulation control method and related equipment in an area.

[0004] The specific technical scheme of the first embodiment of the present invention is: a distributed photovoltaic regulation and control method in a substation, applied to a photovoltaic control system, the method comprising: obtaining the total active power and total reactive power of all inverters in the photovoltaic control system; obtaining the total power factor of the photovoltaic system according to the total active power and the total reactive power; obtaining an active scheduling value and a reactive scheduling value according to the total power factor and a preset target power factor; the active scheduling value is used to adjust the active power of the inverter, and the reactive scheduling value is used to adjust the reactive power of the inverter; the active scheduling value and the reactive scheduling value are allocated according to a preset inverter power allocation strategy to obtain an allocated active adjustment value and an allocated reactive adjustment value; the allocated active adjustment value and the allocated reactive adjustment value are allocated to each inverter; the inverter performs photovoltaic regulation according to the allocated active adjustment value and the allocated reactive adjustment value.

[0005] Preferably, the active scheduling value and the reactive scheduling value are obtained according to the total power factor and the preset target power factor, including: when the total power factor is less than the preset target power factor, adjusting the total active power and the total reactive power with the preset target power factor as the target, the adjustment amount of the total active power is the active scheduling value, and the adjustment amount of the total reactive power is the reactive scheduling value.

[0006] Preferably, the distributed active power adjustment value is obtained by using the following formula:

[0007]

[0008] Among them, p' nis the active power adjustment value after allocation of the nth inverter, p 第n个逆变器额定功率 is the rated power of the nth inverter, P 总额定功率 is the sum of the rated powers of all inverters, P 有功调度值 is the active power scheduling value.

[0009] Preferably, the reactive power adjustment value after allocation is obtained using the following formula:

[0010]

[0011] Among them, Q' n is the reactive power adjustment value after allocation of the nth inverter, p 第n个逆变器额定功率 is the rated power of the nth inverter, P 总额定功率 is the sum of the rated powers of all inverters, Q 无功调度值 is the reactive power dispatch value.

[0012] Preferably, after the inverter performs photovoltaic regulation according to the allocated active power adjustment value and the allocated reactive power adjustment value, it also includes: obtaining the real-time power of the target inverter after photovoltaic regulation; the target inverter is any one of all the inverters; and adjusting the output value of the target inverter according to the real-time power, the preset target active power value and the preset power control strategy.

[0013] Preferably, the preset power control strategy includes: if the real-time power is lower than the preset target active value, the real-time power will take the target active value as the target to maximize the inverter output; if the real-time power is greater than the preset target active value, the preset target active value will be increased.

[0014] Preferably, the preset power control strategy also includes: if the real-time power is lower than the preset target active value, and the difference between the real-time power and the preset target active value is greater than a preset threshold, then reducing the preset target active power.

[0015] The specific technical solution of the second embodiment of the present invention is: a distributed photovoltaic regulation and control system in an area, the system comprising: a power acquisition module, a power factor acquisition module, a power dispatch value acquisition module, a power allocation value acquisition module, a power allocation module and a regulation module; the power acquisition module is used to acquire the total active power and total reactive power of all inverters in the photovoltaic control system; the power factor acquisition module is used to acquire the total power factor of the photovoltaic system according to the total active power and the total reactive power; the power dispatch value acquisition module is used to acquire the active dispatch value according to the total power factor and the preset target power factor. The active scheduling value and the reactive scheduling value are used to adjust the active power of the inverter, and the reactive scheduling value is used to adjust the reactive power of the inverter; the power allocation value acquisition module is used to allocate the active scheduling value and the reactive scheduling value according to the preset inverter power allocation strategy to obtain the allocated active adjustment value and the allocated reactive adjustment value; the power allocation module is used to allocate the allocated active adjustment value and the allocated reactive adjustment value to each inverter; the regulation module is used for the inverter to perform photovoltaic regulation according to the allocated active adjustment value and the allocated reactive adjustment value.

[0016] The specific technical solution of the third embodiment of the present invention is: a distributed photovoltaic regulation and control device in a substation, including a memory and a processor, the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the method described in any one of the first embodiments of the present application.

[0017] The specific technical solution of the fourth embodiment of the present invention is: a computer-readable storage medium storing a computer program, which, when executed by a processor, enables the processor to perform the steps of the method described in any one of the first embodiments of the present application.

[0018] Implementing the embodiments of the present invention will have the following beneficial effects:

[0019] The present invention obtains active scheduling value and reactive scheduling value according to the total power factor and the preset target power factor, and distributes the active scheduling value and the reactive scheduling value to obtain the distributed active adjustment value and the distributed reactive adjustment value. The inverter performs photovoltaic regulation according to the distributed active adjustment value and the distributed reactive adjustment value, and can centrally and efficiently control the active power regulation and reactive power regulation of distributed photovoltaics. While ensuring the accuracy of regulation, it should be able to achieve coordinated regulation of distributed photovoltaics within the range, maximize the distributed photovoltaic power generation capacity, improve the reliability and stability of photovoltaic power generation and power grid power consumption, and maintain the supply and demand balance of the power grid.

Brief Description of the Drawings

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 To regulate the hierarchical structure;

[0022] Figure 2 It is a flow chart of the steps of the distributed photovoltaic regulation control method in the substation;

[0023] Figure 3 A flow chart of the steps for adjusting the output according to the target active value;

[0024] Figure 4 This is a schematic diagram of the structure of the distributed photovoltaic regulation control system in the substation area.

[0025] Figure 5 A diagram of the internal structure of a computer device;

[0026] Among them, 301 is a power acquisition module; 302 is a power factor acquisition module; 303 is a power scheduling value acquisition module; 304 is a power allocation value acquisition module; 305 is a power allocation module; 306 is an adjustment module. [Specific implementation method]

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] The terms "first", "second", etc. in the specification, claims and drawings of this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or modules is not limited to the listed steps or modules, but optionally includes steps or modules that are not listed, or optionally includes other steps or modules that are inherent to these processes, methods, products or devices.

[0029] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0030] Distributed photovoltaic group regulation and control technology is a means of regulating and controlling distributed photovoltaics through centralized control and autonomous coordination. By organizing distributed photovoltaics into groups, centralized control of distributed photovoltaics within the group is achieved, while allowing each distributed photovoltaic to conduct autonomous coordination within a certain range to achieve regulation and control of the distribution network. Distributed photovoltaic group regulation and control technology achieves refined regulation and global coordinated control of distributed photovoltaics through centralized control and autonomous coordination, and has major advantages such as high controllability and autonomous coordination. Controllability: Distributed photovoltaics are controllable and can be flexibly adjusted according to system requirements, effectively responding to changes in distribution network load and grid fluctuations, and improving system performance and power supply quality. Autonomous coordination: Distributed photovoltaic group regulation and control technology allows distributed photovoltaics to conduct autonomous coordination within a certain range. Each distributed photovoltaic can make responsive adjustment decisions based on its own situation (through real-time power generation and energy storage levels, it can determine whether power generation or energy storage operations are required. If the power generation capacity or energy storage capacity is high, the excess power can be actively injected into the distribution network; otherwise, it can request power from other distributed photovoltaics. In addition, it can flexibly adjust its own operating status to coordinate with other distributed photovoltaics based on factors such as load demand and electricity market prices.) and local control requirements. At the same time, in order to achieve coordination with other distributed photovoltaics, information exchange and coordination are required between distributed photovoltaics. Intelligent devices and necessary communication means are used to establish a communication network between distributed photovoltaics to achieve the transmission and sharing of information data such as power generation capacity, energy storage level, and load demand. In the coordination process, distributed photovoltaics can achieve overall distribution network control through collective decision-making and collaboration. Efficient and reliable: Through the combination of centralized control and autonomous coordination, the efficiency and reliability of regulation are taken into account. Centralized control can ensure the accuracy and consistency of global regulation, while autonomous coordination improves the fault tolerance and stability of the system.

[0031] Distributed photovoltaic group control technology adopts a three-level master station control architecture of province, district and user, that is, provincial master station, district master station and user master station are set up in the distribution network, such as Figure 1As shown. The provincial master station is responsible for overall planning and global control, the prefectural master station is responsible for regional scheduling and distributed photovoltaic group control, and the user-level master station is responsible for user-side demand response and coordination. This architecture can realize hierarchical management, carry out control from top to bottom, and adapt to the regulation needs at different levels. In order to realize the centralized regulation of distributed power supply groups, the corresponding distributed photovoltaic group regulation and control module is designed. By communicating with the communication interface of each distributed power source, the operating status and parameters of the distributed photovoltaic are obtained, and regulation instructions are sent to it, and finally the centralized regulation and control of the distributed photovoltaic is completed. By combining the architecture and modules, the distributed photovoltaic group can be effectively managed and regulated, thereby improving the adjustability and controllability of the distribution network.

[0032] However, with the large-scale use of distributed photovoltaics, the access of distributed photovoltaics has brought many impacts on the safe and stable operation of the distribution network, such as active power regulation and reactive power regulation. Adjustable and controllable demand: With the rapid development of renewable energy, the access scale of distributed photovoltaics continues to grow; however, traditional distribution networks are often unable to effectively manage large-scale distributed photovoltaic access, which makes the distribution network face the need for fine-tuning of distributed photovoltaics, including the adjustment of parameters such as output power, reactive power and voltage, to adapt to the changes in distribution network load and improve the power supply quality. Active power regulation: A large number of distributed photovoltaic access in the distribution network will bring fluctuations and uncertainties in active power. Active power regulation is used to balance the active power of the system; however, due to the large number and wide distribution of distributed photovoltaic groups, active power regulation involves large-scale coordinated control problems, including maintaining the balance of supply and demand of the power grid and ensuring stable voltage and frequency. In response to the above problems, a regulation and control strategy for distributed photovoltaic group regulation and control technology must be formed to achieve fine-tuning and global coordinated control of distributed photovoltaics while considering compatibility with traditional distribution systems, thereby ensuring the safe and stable operation of the distribution network.

[0033] See also Figure 2 , is a flow chart of the steps of a distributed photovoltaic regulation control method in a metropolitan area in the first embodiment of the present application, so as to improve the reliability and stability of photovoltaic power generation and power grid power consumption and maintain the supply and demand balance of the power grid. The method includes:

[0034] Step 101, obtaining the total active power and total reactive power of all inverters in the photovoltaic control system;

[0035] Step 102: Obtain a total power factor of the photovoltaic system according to the total active power and the total reactive power;

[0036] Step 103: acquiring an active scheduling value and a reactive scheduling value according to the total power factor and the preset target power factor; the active scheduling value is used to adjust the active power of the inverter, and the reactive scheduling value is used to adjust the reactive power of the inverter;

[0037] Step 104: Allocate the active scheduling value and the reactive scheduling value according to a preset inverter power allocation strategy to obtain an allocated active adjustment value and an allocated reactive adjustment value;

[0038] Step 105: Distribute the allocated active power adjustment value and the allocated reactive power adjustment value to each inverter;

[0039] Step 106: The inverter performs photovoltaic regulation according to the allocated active power adjustment value and the allocated reactive power adjustment value.

[0040] Specifically, there are n inverters in the photovoltaic system, and the active power P1, P2, ... P of each inverter is obtained. n , and obtain the reactive power Q1, Q2, ... Q of each inverter n ; Sum all active powers to get the total active power, and sum all reactive powers to get the total reactive power, that is:

[0041] P 总有功功率 =P1+P2+...+P n

[0042] Q 总无功功率 =Q1+Q2+...+Q n

[0043] According to the total active power and the total reactive power, the total power factor of the photovoltaic system is obtained, that is:

[0044]

[0045] The numerical range of the total power factor is 0-1. The larger the value, the greater the output value of the inverter. Therefore, the active scheduling value and the reactive scheduling value are obtained according to the total power factor and the preset target power factor (usually 1), so that the total power factor approaches the preset target power factor; the active scheduling value and the reactive scheduling value are allocated according to the preset inverter power allocation strategy to obtain the adjustment value of each inverter, that is, the allocated active adjustment value and the allocated reactive adjustment value, and the allocated active adjustment value and the allocated reactive adjustment value are allocated to each inverter, and the inverter performs photovoltaic regulation according to the allocated active adjustment value and the allocated reactive adjustment value.

[0046] The method in this embodiment obtains the active scheduling value and the reactive scheduling value according to the total power factor and the preset target power factor, and distributes the active scheduling value and the reactive scheduling value to obtain the distributed active adjustment value and the distributed reactive adjustment value. The inverter performs photovoltaic regulation according to the distributed active adjustment value and the distributed reactive adjustment value, which can centrally and efficiently control the active power regulation and reactive power regulation of distributed photovoltaics, and while ensuring the accuracy of regulation, it should be able to achieve coordinated regulation of distributed photovoltaics within the range, maximize the distributed photovoltaic power generation capacity, improve the reliability and stability of photovoltaic power generation and power grid power consumption, and maintain the supply and demand balance of the power grid.

[0047] In a specific embodiment, the active scheduling value and the reactive scheduling value are obtained according to the total power factor and the preset target power factor, including: when the total power factor is less than the preset target power factor, adjusting the total active power and the total reactive power with the preset target power factor as the target, the adjustment amount of the total active power is the active scheduling value, and the adjustment amount of the total reactive power is the reactive scheduling value.

[0048] Specifically, the preset target power factor can be set according to actual conditions, and the preferred preset target power factor is 1; when the total power factor is less than 1, the active scheduling value and the reactive scheduling value are obtained to adjust the power of the inverter. Usually, the active scheduling value is positive and the reactive scheduling value is negative, thereby improving the power factor of the inverter.

[0049] In a specific embodiment, the distributed active power adjustment value is obtained by using the following formula:

[0050]

[0051] Among them, p' n is the active power adjustment value after allocation of the nth inverter, p 第n个逆变器额定功率 is the rated power of the nth inverter, P 总额定功率 is the sum of the rated powers of all inverters, P 有功调度值 is the active power scheduling value.

[0052] In a specific embodiment, the reactive power adjustment value after allocation is obtained by using the following formula:

[0053]

[0054] Among them, Q' n is the reactive power adjustment value after allocation of the nth inverter, p 第n个逆变器额定功率 is the rated power of the nth inverter, P 总额定功率 is the sum of the rated powers of all inverters, Q 无功调度值 is the reactive power dispatch value.

[0055] Specifically, the total active and reactive power values ​​issued by the dispatcher will be allocated according to the inverter power allocation strategy (fixed ratio of inverters: the ratio of the rated power of a single inverter to the rated power of the total inverter).

[0056] In the specific embodiments, see Figure 3 After the inverter performs photovoltaic regulation according to the allocated active power adjustment value and the allocated reactive power adjustment value, the method further includes:

[0057] Step 201, obtaining the real-time power of the target inverter after photovoltaic regulation; the target inverter is any one of all the inverters;

[0058] Step 202: Adjust the output value of the target inverter according to the real-time power, the preset target active value and the preset power control strategy.

[0059] Specifically, obtain the real-time power p of the inverter after photovoltaic adjustment 总 , and refer to the real-time power and target active value, formulate a power control strategy with the maximum total active power output as the goal, thereby improving the output value of the target inverter.

[0060] In a specific embodiment, the preset power control strategy includes: if the real-time power is lower than the preset target active value, the real-time power will take the target active value as the target to maximize the inverter output; if the real-time power is greater than the preset target active value, the preset target active value will be increased.

[0061] Specifically, the real-time power will be collected in each cycle. If the real-time power is lower than the target active value, the real-time power will be based on the target active value, and the inverter output will be maximized, thereby making the active power infinitely close to the target active value; if the real-time power is close to the target value, the strategy will increase the target active value (the increased value is a fixed step value), thereby increasing the output of the inverter.

[0062] In a specific embodiment, the preset power control strategy also includes: if the real-time power is lower than the preset target active value, and the difference between the real-time power and the preset target active value is greater than a preset threshold, then the preset target active power is reduced. Specifically, if the real-time active power of the inverter is lower than the target value (difference from the target value by a certain value), the strategy will adjust the target value downward; the above strategy is used to maximize the output value of the inverter.

[0063] Taking advantage of the controllability of distributed photovoltaics, the global control and local autonomous coordination of the distribution network access to distributed photovoltaics are realized, providing support for the safe and stable operation of the power grid. For future research progress, the control strategy can be optimized to adapt to the evolving distribution network needs.

[0064] The distributed photovoltaic regulation and control method proposed in the present invention can centrally and efficiently control the active power regulation and reactive power regulation of distributed photovoltaics; and while ensuring the accuracy of regulation, it should be able to achieve precise regulation of distributed photovoltaics within a range, maximize the distributed photovoltaic power generation capacity, and improve the reliability and stability of photovoltaic power generation and power grid power consumption.

[0065] In the specific embodiments, see Figure 4 , is a schematic diagram of the structure of a distributed photovoltaic regulation control system in a substation in the second embodiment of the present application, the system comprising: a power acquisition module 301, a power factor acquisition module 302, a power dispatch value acquisition module 303, a power allocation value acquisition module 304, a power allocation module 305 and a regulation module 306; the power acquisition module 301 is used to acquire the total active power and total reactive power of all inverters in the photovoltaic control system; the power factor acquisition module 302 is used to acquire the total power factor of the photovoltaic system according to the total active power and the total reactive power; the power dispatch value acquisition module 303 is used to acquire the total power factor according to the total power factor and the preset target The power factor obtains the active scheduling value and the reactive scheduling value; the active scheduling value is used to adjust the active power of the inverter, and the reactive scheduling value is used to adjust the reactive power of the inverter; the power allocation value acquisition module 304 is used to allocate the active scheduling value and the reactive scheduling value according to the preset inverter power allocation strategy, and obtain the allocated active adjustment value and the allocated reactive adjustment value; the power allocation module 305 is used to allocate the allocated active adjustment value and the allocated reactive adjustment value to each inverter; the regulation module 306 is used for the inverter to perform photovoltaic regulation according to the allocated active adjustment value and the allocated reactive adjustment value.

[0066] The system in this embodiment obtains the active scheduling value and the reactive scheduling value according to the total power factor and the preset target power factor, and distributes the active scheduling value and the reactive scheduling value to obtain the distributed active adjustment value and the distributed reactive adjustment value. The inverter performs photovoltaic regulation according to the distributed active adjustment value and the distributed reactive adjustment value, and can centrally and efficiently control the active power regulation and reactive power regulation of distributed photovoltaics. While ensuring the accuracy of regulation, it should be able to achieve coordinated regulation of distributed photovoltaics within the range, maximize the distributed photovoltaic power generation capacity, improve the reliability and stability of photovoltaic power generation and power grid power consumption, and maintain the supply and demand balance of the power grid.

[0067] In a specific embodiment, the third embodiment of the present application provides a distributed photovoltaic regulation and control device in a substation, including a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the method described in any one of the first embodiments of the present application. The device in this embodiment obtains an active scheduling value and a reactive scheduling value according to a total power factor and a preset target power factor, and distributes the active scheduling value and the reactive scheduling value to obtain an allocated active adjustment value and an allocated reactive adjustment value, and the inverter performs photovoltaic regulation according to the allocated active adjustment value and the allocated reactive adjustment value, which can centrally and efficiently control the active power regulation and reactive power regulation of distributed photovoltaics, and while ensuring the accuracy of regulation, it should be able to achieve coordinated regulation of distributed photovoltaics within the range, and maximize the distributed photovoltaic power generation capacity, and improve the reliability and stability of photovoltaic power generation and power grid power consumption, and maintain the supply and demand balance of the power grid.

[0068] In a specific embodiment, the fourth embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the processor executes the steps of the method described in any one of the first embodiments of the present application. The storage medium in this embodiment obtains the active scheduling value and the reactive scheduling value according to the total power factor and the preset target power factor, and distributes the active scheduling value and the reactive scheduling value to obtain the allocated active adjustment value and the allocated reactive adjustment value. The inverter performs photovoltaic regulation according to the allocated active adjustment value and the allocated reactive adjustment value, which can centrally and efficiently control the active power regulation and reactive power regulation of distributed photovoltaics, and while ensuring the accuracy of regulation, it should be able to achieve coordinated regulation of distributed photovoltaics within the range, and maximize the distributed photovoltaic power generation capacity, and improve the reliability and stability of photovoltaic power generation and power grid power consumption, and maintain the supply and demand balance of the power grid.

[0069] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] Figure 5 The internal structure of a computer device in one embodiment is shown. The computer device can be a terminal or a server. Figure 5The computer device includes a processor, a memory, etc. connected via a system bus. The memory includes a non-volatile storage medium and an internal memory. The non-volatile storage medium of the computer device stores an operating system and may also store a computer program. When the computer program is executed by the processor, the processor can implement the method in this embodiment. The internal memory may also store a computer program. When the computer program is executed by the processor, the processor can implement the method in this embodiment. Those skilled in the art can understand that Figure 5 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0071] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

[0072] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A distributed photovoltaic regulation control method for a substation, applied to a photovoltaic control system, characterized in that: The method comprises: Obtain the total active power and total reactive power of all inverters in the photovoltaic control system; Obtaining a total power factor of the photovoltaic system according to the total active power and the total reactive power; Obtaining an active scheduling value and a reactive scheduling value according to the total power factor and the preset target power factor; the active scheduling value is used to adjust the active power of the inverter, and the reactive scheduling value is used to adjust the reactive power of the inverter; The active scheduling value and the reactive scheduling value are allocated according to a preset inverter power allocation strategy to obtain an allocated active adjustment value and an allocated reactive adjustment value; Distributing the allocated active power adjustment value and the allocated reactive power adjustment value to each inverter; The inverter performs photovoltaic regulation according to the allocated active power adjustment value and the allocated reactive power adjustment value.

2. The distributed photovoltaic regulation control method according to claim 1, characterized in that: The obtaining of the active power dispatching value and the reactive power dispatching value according to the total power factor and the preset target power factor includes: When the total power factor is less than the preset target power factor, the total active power and the total reactive power are adjusted with the preset target power factor as the target, the adjustment amount of the total active power is the active scheduling value, and the adjustment amount of the total reactive power is the reactive scheduling value.

3. The distributed photovoltaic regulation control method according to claim 1, characterized in that: The distributed active power adjustment value is obtained by the following formula: Among them, p' n is the active power adjustment value after allocation of the nth inverter, p 第n个逆变器额定功率 is the rated power of the nth inverter, P 总额定功率 is the sum of the rated powers of all inverters, P 有功调度值 is the active power scheduling value.

4. The distributed photovoltaic regulation control method according to claim 1, characterized in that: The reactive power adjustment value after allocation is obtained by the following formula: Among them, Q' n is the reactive power adjustment value after allocation of the nth inverter, p 第n个逆变器额定功率 is the rated power of the nth inverter, P 总额定功率 is the sum of the rated powers of all inverters, Q 无功调度值 is the reactive power dispatch value.

5. The distributed photovoltaic regulation control method according to claim 1, characterized in that: After the inverter performs photovoltaic regulation according to the allocated active power adjustment value and the allocated reactive power adjustment value, the method further includes: Acquire the real-time power of the target inverter after photovoltaic regulation; the target inverter is any one of all the inverters; The output value of the target inverter is adjusted according to the real-time power, the preset target active value and the preset power control strategy.

6. The distributed photovoltaic regulation control method according to claim 5, characterized in that: The preset power control strategy includes: If the real-time power is lower than the preset target active value, the real-time power will be set at the target active value to maximize the inverter output; If the real-time power is greater than the preset target active power value, the preset target active power value is increased.

7. The distributed photovoltaic regulation control method according to claim 5, characterized in that: The preset power control strategy also includes: If the real-time power is lower than the preset target active power value, and the difference between the real-time power and the preset target active power value is greater than a preset threshold, the preset target active power is reduced.

8. A distributed photovoltaic regulation control system in an area, characterized in that: The system comprises: a power acquisition module, a power factor acquisition module, a power scheduling value acquisition module, a power allocation value acquisition module, a power allocation module and a regulation module; The power acquisition module is used to acquire the total active power and total reactive power of all inverters in the photovoltaic control system; The power factor acquisition module is used to acquire the total power factor of the photovoltaic system according to the total active power and the total reactive power; The power scheduling value acquisition module is used to acquire an active scheduling value and a reactive scheduling value according to the total power factor and the preset target power factor; the active scheduling value is used to adjust the active power of the inverter, and the reactive scheduling value is used to adjust the reactive power of the inverter; The power allocation value acquisition module is used to allocate the active scheduling value and the reactive scheduling value according to a preset inverter power allocation strategy to obtain an allocated active adjustment value and an allocated reactive adjustment value; The power distribution module is used to distribute the distributed active power adjustment value and the distributed reactive power adjustment value to each inverter; The regulating module is used for the inverter to perform photovoltaic regulation according to the allocated active power adjustment value and the allocated reactive power adjustment value.

9. A distributed photovoltaic regulation control device in a substation, comprising a memory and a processor, characterized in that: The memory stores a computer program, and when the computer program is executed by the processor, the processor is caused to perform the steps of the method according to any one of claims 1 to 7.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the processor is caused to perform the steps of the method according to any one of claims 1 to 7.

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