Cooperative power generation control method and device for centralized and distributed new energy

Abstract

The invention discloses a cooperative power generation control method and device for centralized and distributed new energy, and the method comprises the steps: carrying out the aggregation of centralized stations and distributed stations of two different power supplies, namely wind and light, as a whole in each region range under the jurisdiction of a provincial main network, respectively counting the sum of the output of the aggregated wind power plants and the aggregated light electric fields in all the areas, and distributing the regulating variables of the wind and light power sources in the provincial areas according to the wind-light power limiting ratio T to obtain power limiting instruction values of each aggregated wind power plant and each aggregated light electric field; performing corresponding power generation control on each aggregation electric field according to a designed power limiting control strategy, and rejecting the aggregation electric field with insufficient power generation capacity out of the distribution range of the regulating variable; and verifying whether the power generation capacity of the rejected aggregated electric field meets the power limiting instruction value of the current period or not in each period so as to restore power generation control of the aggregated electric field with the power generation capacity. The new energy rapid response capability can be maximized, and the power supply reliability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy distribution control, and in particular to a method and device for coordinated power generation control of centralized and distributed new energy sources. Background Art

[0002] The rapid development of renewable energy power generation has enriched the types of power sources in the power system. In addition to traditional thermal power and hydropower, large-scale centralized wind power and photovoltaic power stations as well as a large number of distributed small-scale wind power, photovoltaic, and biomass power generation are constantly connected to the power grid, changing the power structure of the power system and prompting the power system to develop in a more diversified direction. Renewable energy power generation has the characteristics of intermittency, volatility, and randomness. Large-scale centralized renewable energy power generation may exceed the grid's absorption capacity at peak output, and may lead to insufficient power supply at low output. Distributed renewable energy is close to the user side, and its output uncertainty will also affect the voltage stability and power quality of the distribution network. In order to ensure the safe and stable operation of the power system, it is necessary to improve the flexibility and adaptability of the power grid to cope with the various challenges brought by renewable energy power generation.

[0003] Centralized new energy power stations are usually located in areas rich in energy resources. They have large power generation capacity but are affected by natural conditions and show large-scale, regular output fluctuations. Distributed new energy is close to the load side and has low power but is affected by factors such as the local environment and user demand. Its output is highly random and intermittent, and it is difficult to coordinate and control the two. Centralized power sources are generally equipped with a more complete control system, which responds relatively slowly to grid dispatch instructions but has strong regulation capabilities. Distributed power sources are numerous and dispersed, and the control accuracy and response speed of a single power source are limited. When participating in grid coordinated control, it is difficult to accurately coordinate with centralized power sources in terms of time scale and regulation intensity.

[0004] The existing control methods for renewable energy power generation mainly focus on active power control of centralized renewable energy stations. For the regulation of distributed renewable energy, the local consumption method coordinated on the distribution network side is usually adopted. Distributed renewable energy stations are not included in the scope of active power control of the main network, which is easy to cause waste of resources. With the increasing distribution, rapid development and large number of distributed renewable energy, the regulation of power systems has become more difficult. Some technologies are aggregated on the distribution network side and then coordinated with conventional thermal, water, renewable energy and other power sources on the main network side. However, they do not consider the impact of renewable energy stations with insufficient power generation capacity on the regulation effect of the main network, and the energy utilization efficiency is low. Therefore, how to make full use of various types of distributed new control spaces and include them in the active power control scope as a whole with centralized renewable energy, so as to maximize the rapid response capability of renewable energy, is still a technical problem that needs to be solved in this field. Summary of the invention

[0005] To address the deficiencies in the existing technology, the present invention provides a coordinated power generation control method and device for centralized and distributed new energy. By aggregating distributed new energy and incorporating it as a whole with centralized new energy on the main grid side into the active power control scope, and setting corresponding rewards and penalties for new energy power stations with insufficient power generation capabilities during the regulation process, the rapid response capabilities of new energy can be maximally exerted, thereby improving power supply reliability.

[0006] The present invention adopts the following technical solutions.

[0007] In the first aspect, the present invention provides a coordinated power generation control method for centralized and distributed new energy, and the method includes:

[0008] Step 1: Aggregate the centralized power stations and distributed power stations of the two different power sources of wind and light in each regional scope under the jurisdiction of the provincial main grid as a whole to obtain the aggregated wind farms and aggregated photovoltaic power stations in each region;

[0009] Step 2: Respectively count the sum of the outputs of the aggregated wind farms and aggregated photovoltaic power stations in all regions, and combine with the new energy target output value required by the current provincial main grid, and allocate the adjustment amount of the wind and light power sources in the provincial region according to the formulated wind and light curtailment ratio T to obtain the curtailment command value for each aggregated wind farm and aggregated photovoltaic power station;

[0010] Step 3: According to the curtailment command value of each aggregated power station, perform corresponding power generation control on each aggregated power station according to the designed curtailment control strategy, and exclude the aggregated power stations with insufficient power generation capabilities from the scope of adjustment amount allocation;

[0011] Step 4: Check whether the power generation capabilities of the excluded aggregated power stations meet the curtailment command value of the current cycle through periodic verification, so as to restore power generation control for the aggregated power stations with power generation capabilities.

[0012] Optionally, in Step 2, the expression for allocating the adjustment amount of the wind and light power sources in the provincial region according to the formulated wind and light curtailment ratio T is as follows:

[0013]

[0014] P X, Light = PWind + PLight - P des, Total - P X, Wind

[0015] In the formula, PWind represents the sum of the outputs of the aggregated wind farms in all regions, PLight represents the sum of the outputs of the aggregated photovoltaic power stations in all regions; P des, Total represents the new energy target output value required by the current provincial main grid, T is the set wind and light curtailment ratio; P X, Wind represents the adjustment amount of the wind power source; P X,Light represents the adjustment amount of the light power source.

[0016] Optionally, in step 2, the step of obtaining the curtailment instruction value for each aggregated wind farm and aggregated photovoltaic power plant includes:

[0017] Calculate the difference between the sum of the outputs of the aggregated wind farms in all regions and the adjustment amount of the allocated wind power source to obtain the total wind power output target value of the wind power source;

[0018] Based on the capacity ratio of each regional aggregated wind farm and its current active power, decompose the total wind power output target value into instructions to generate the curtailment instruction value for each regional aggregated wind farm;

[0019] Generate the curtailment instruction value for each regional aggregated photovoltaic power plant according to the same principle as the process of generating the curtailment instruction value for each regional aggregated wind farm described above.

[0020] Optionally, in step 3, the expression of the designed curtailment control strategy is as follows:

[0021]

[0022] In the formula, P i.B is the target value of the i-th regional aggregated power plant after executing its curtailment instruction; P i.A is the current output of the aggregated power plant i at the moment of executing the curtailment instruction; the aggregated power plant is an aggregated wind farm or an aggregated photovoltaic power plant; K A is the curtailment coefficient; ΔP is the total curtailment value of the type to which the aggregated power plant belongs; ΔP 联 is the positive deviation power of the tie line; n is the number of aggregated power plants that can execute curtailment; P j.A is the output of the j-th aggregated power plant that can execute the curtailment instruction before curtailment;

[0023] K i is the penalty factor. In the curtailment control process for the same batch, each aggregated power plant is given X assessment opportunities. The value of K i increases sequentially with each cycle adjustment of the assessment opportunity. When the current output of the aggregated power plant still cannot meet the control dead zone of the curtailment instruction after X consecutive cycle adjustments, the aggregated power plant is regarded as having insufficient power generation capacity and is excluded from the distribution range of the adjustment amount.

[0024] Optionally, the value of the set number is X = 3;

[0025] The value of the penalty factor is K i = {0|0.1|0.5|1.0}, that is: the initial default value of K i is 0, and the values of K i at the three assessments are 0.1, 0.5, and 1.0 in sequence.

[0026] Optionally, the expression for the control dead zone is as follows:

[0027] 0.95*P i.B.l ≤P i.A.l+1 ≤1.05*P i.B.l

[0028] In the formula, P i.B.l represents the target value of the aggregated electric field i after the power curtailment instruction in the l-th assessment period; P i.A.l+1 represents the current output of the aggregated electric field i at the moment of the power curtailment instruction in the (l + 1)-th assessment period.

[0029] Optionally, step 4 includes: restoring the power generation control of the aggregated electric fields with power generation capabilities according to the formulated restoration control strategy; wherein, the expression of the formulated restoration control strategy is as follows:

[0030]

[0031] In the formula, P i.A and P i.B respectively represent the current power value of the aggregated electric field in the i-th region and the target value after restoring the execution of the power curtailment instruction; the aggregated electric field is an aggregated wind farm or an aggregated photovoltaic farm; K B is the restoration coefficient; P i.N and P j.N are the installed capacities of the i-th and j-th aggregated electric fields that can restore the execution of the power curtailment instruction; ΔP is the total power curtailment value of the type to which the aggregated electric field belongs; ΔP 联 is the positive deviation power of the tie line; P i.Y and P j.Y respectively represent the current power prediction values of the i-th and j-th aggregated electric fields; n is the number of aggregated electric fields that can execute power curtailment.

[0032] In a second aspect, the present invention provides a coordinated power generation control device for centralized and distributed new energy, which operates according to the steps of any one of the first aspects of the present invention. The device includes:

[0033] An aggregation module, which is used to aggregate the centralized stations and distributed stations of its two different power sources of wind and light as a whole within the scope of each region under the jurisdiction of the provincial main grid to obtain the aggregated wind farms and aggregated photovoltaic farms in each region;

[0034] A distribution module, which is used to respectively count the sum of the outputs of the aggregated wind farms and aggregated photovoltaic farms in all regions, and combine the required new energy target output value of the current provincial main grid, and allocate the adjustment amount of the wind and light power sources in the provincial region according to the formulated wind and light power curtailment ratio T to obtain the power curtailment instruction values of each aggregated wind farm and aggregated photovoltaic farm;

[0035] A power limit control module, configured to perform corresponding power generation control on each aggregated electric field according to the power limit command value of each aggregated electric field, in accordance with the designed power limit control strategy, and exclude the aggregated electric fields with insufficient power generation capacity from the distribution range of the regulation amount;

[0036] A restoration control module, configured to check whether the power generation capacity of the excluded aggregated electric field meets the power limit command value of the current cycle in each cycle, so as to restore the power generation control of the aggregated electric fields with power generation capacity.

[0037] In a third aspect, the present invention provides a terminal, including a processor and a storage medium;

[0038] The storage medium is used to store instructions;

[0039] The processor is configured to operate according to the instructions to execute the steps of the method described in any one of the first aspects of the present invention.

[0040] In a fourth aspect, the present invention provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the steps of the method described in any one of the first aspects of the present invention are implemented.

[0041] The beneficial effects of the present invention are as follows. Compared with the prior art:

[0042] 1. Centralized new energy can generate electricity on a large scale in areas rich in energy resources to provide a stable basic power supply for the power grid, and distributed new energy is close to users and can flexibly adjust its output according to the real-time needs of users and the operating state of the power grid; by aggregating distributed new energy and considering its volatility with centralized new energy on the main grid side and incorporating them into the active power control range as a whole, the distributed power sources and centralized new energy are coordinated to better meet the peak-valley changes of the power grid load, improve the peak shaving capacity of the power system, reduce the system reserve capacity, and improve the energy utilization efficiency.

[0043] 2. By setting a reasonable wind-solar power limit ratio T based on the installed capacity ratio of wind power and photovoltaic power in each research area, and respectively allocating the regulation amount for the wind and solar power sources in the research area, the allocation of the two power sources is more reasonable. By reasonably planning the allocation of wind-solar resources, it is beneficial to solve problems such as power imbalance and interaction of multi-time scale control strategies, and enrich the power grid regulation and peak shaving means.

[0044] 3. In the power curtailment control strategy formulated by the present invention, corresponding rewards and punishments are set for new energy power stations with insufficient power generation capacity, and power stations with insufficient power generation capacity are promptly excluded from the scope of regulation quantity allocation, and the insufficient part of their regulation is transferred to new energy power stations with power generation capacity, so that the grid regulation can achieve an ideal regulation effect in a shorter cycle; for the restoration control: by verifying whether the restoration instruction meets the power generation capacity in each cycle, power stations with power generation capacity are promptly restored to power generation, enabling the grid to have more regulation space and regulation options, and avoiding mis-including power stations without power generation capacity in the regulation quantity allocation calculation again; through power curtailment control and restoration control, the rapid response ability of new energy is maximally exerted, and the power generation efficiency is improved.

[0045] 4. The decentralized layout of distributed new energy makes it have higher flexibility and reliability in the face of natural disasters or grid failures. After the present invention incorporates distributed new energy into the main network control system, when the main power grid fails, the distributed new energy system can continue to provide power supply for local areas, ensuring the uninterrupted operation of important loads. This "load off-grid" ability not only improves the reliability of the power system, but also provides more stable power services for users, improving power supply reliability and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a flow chart of the collaborative power generation control method for centralized and distributed new energy in the present invention;

[0047] Figure 2 It is a structural principle block diagram of the collaborative power generation control device for centralized and distributed new energy in the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0048] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The embodiments described in the present invention are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the spirit of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0049] Embodiment 1:

[0050] Refer to Figure 1 , the embodiment of the present invention provides a collaborative power generation control method for centralized and distributed new energy, which specifically includes the following steps:

[0051] Step 1: Aggregate the centralized power stations and distributed power stations of the two different power sources of wind and light in each area under the jurisdiction of the provincial main grid as a whole to obtain the aggregated wind farms and aggregated photovoltaic power stations in each area;

[0052] In this embodiment, taking the scope under the jurisdiction of the main network control system in Jiangsu Province as an example, it is divided into 13 regions according to municipalities. When aggregating, taking Nanjing City as an example, the centralized power stations and distributed power stations of all wind power sources within the scope of Nanjing City are considered for their volatility and included in the scope of the main network active power control as an overall aggregated wind farm; correspondingly, the centralized power stations and distributed power stations of all photovoltaic power sources within the scope of Nanjing City are considered for their volatility and included in the scope of the main network active power control as an overall aggregated photovoltaic farm.

[0053] Step 2: Respectively calculate the sum of the outputs of the aggregated wind farms and aggregated photovoltaic farms in all regions, and in combination with the new energy target output value required by the current provincial main network, allocate the adjustment amounts of wind and photovoltaic power sources within the provincial region according to the formulated wind-solar curtailment ratio T to obtain the curtailment instruction values for each aggregated wind farm and aggregated photovoltaic farm;

[0054] Specifically, the wind-solar curtailment ratio T is set based on the installed capacities of wind and photovoltaic power sources within the studied region. Taking the installed capacities of wind and photovoltaic power sources in Jiangsu Province currently as an example, for photovoltaic, the curtailment time needs to be preset in advance. During the non-curtailment time period, photovoltaic curtailment is not allowed; within the normal curtailment time period, the allocation ratio of the adjustment amounts of wind and photovoltaic is 3:1, that is, the wind-solar curtailment ratio T = 3; the allocation expression is as follows:

[0055]

[0056] P X, P_photo = P_wind + P_photo - P_total - P_wind des, - P_wind X, wind

[0057] In the formula, P_wind represents the sum of the outputs of the aggregated wind farms in all regions, P_photo represents the sum of the outputs of the aggregated photovoltaic farms in all regions; P des, total represents the new energy target output value required by the current provincial main network, T is the set wind-solar curtailment ratio; P X, wind represents the adjustment amount of wind power sources; P X, photo represents the adjustment amount of photovoltaic power sources.

[0058] Furthermore, according to the allocated adjustment amount P_wind of wind power sources X, and the adjustment amount P_photo of wind and photovoltaic power sources X, , the total wind power output target value P_wind of wind power sources is calculated through the following formula des, and the total wind power output target value P_photo of wind and photovoltaic power sources: des, :

[0059] P des, wind ＝ P_wind - P_wind X, wind

[0060] P des,Light ＝ P light - P X, light.

[0061] Finally, based on the capacity proportion of each regional aggregated wind farm and its current active power, the total wind power output target value P des, The total wind power output target value P of wind and light power sources des, for light is decomposed into commands to generate the curtailment command values for each regional aggregated wind farm and aggregated photovoltaic power station; among them, the specific command decomposition method is allocated according to the current implementation of the allocation measures in the studied area, which will not be elaborated here.

[0062] It should be noted that most traditional power grids are mainly based on centralized power sources. For centralized new energy power stations, through the coordinated optimization control of multiple units and multiple regions, the power generation efficiency and stability can be improved; in this invention, by combining distributed new energy, the coordinated control technology of centralized and distributed power sources is studied to realize the coordinated operation of multiple distributed power sources and centralized new energy. By setting different wind and light curtailment ratios, the allocation of wind and light resources is reasonably planned to solve problems such as power imbalance and interaction of multi-time scale control strategies, and to enrich the power grid regulation and peak shaving means.

[0063] Step 3: According to the curtailment command values of each aggregated power station, perform corresponding power generation control on each aggregated power station according to the designed curtailment control strategy, and exclude the aggregated power stations with insufficient power generation capacity from the allocation range of the regulation amount;

[0064] Preferably, the expression of the curtailment control strategy designed in this embodiment is as follows:

[0065]

[0066] In the formula, P i.B is the target value of the i-th regional aggregated power station after executing its curtailment command; P i.A is the current output of the aggregated power station i at the moment of executing the curtailment command; the aggregated power station is an aggregated wind farm or an aggregated photovoltaic power station; K A is the curtailment coefficient; ΔP is the total curtailment value of the type to which the aggregated power station belongs; ΔP 联 is the positive deviation power of the tie line; n is the number of aggregated power stations that can execute curtailment; P j.A is the output of the j-th aggregated power station that can execute the curtailment command before curtailment; among them, considering the situation that the AGC command (curtailment command) of individual aggregated power stations is not executed or not executed in place, this invention adds a penalty factor K i to restrict and regulate it. During the curtailment control process of the same batch, each aggregated power station is given X assessment opportunities, K iIts value increases sequentially with each adjustment of the assessment opportunity cycle. When the current output of the aggregated electric field still cannot meet the control dead zone of the power curtailment instruction after X consecutive cycle adjustments (that is, for each power curtailment cycle, the active power value before the next cycle cannot reach the dead zone range of the instruction value of the previous cycle), then the aggregated electric field is regarded as having insufficient power generation capacity and is excluded from the distribution range of the regulation amount.

[0067] A preferred but non-limiting embodiment, in this embodiment, the expression of the control dead zone is as follows:

[0068] 0.95*P i.B.l ≤P i.A.l+1 ≤1.05*P i.B.l

[0069] In the formula, P i.B.l represents the target value of the aggregated electric field i after executing the power curtailment instruction of the l-th assessment cycle; P i.A.l+1 represents the current output of the aggregated electric field i at the moment of executing the power curtailment instruction of the (l + 1)-th assessment cycle.

[0070] It should be noted that according to the new energy unit configuration of each regional power grid, the values of the assessment times X and the penalty factor K i can be set to different values. For example, X = 4, K i = {0|0.2|0.6|0.8|1.0}, etc.

[0071] In order to obtain better technical effects in this embodiment, the number of assessment opportunities X is set to 3, and the value of K i is K i = {0|0.1|0.5|1.0}, that is: the initial default value of K i is 0, and the values of K i at the three assessments are 0.1, 0.5, and 1.0 in sequence; after three assessments are completed, relevant wind farms are notified to rectify, otherwise grid connection and power generation are not permitted.

[0072] For the power curtailment control in this embodiment: by setting 3 assessment opportunities for the new energy power station, the power stations with insufficient power generation capacity are promptly excluded from the distribution range of the regulation amount, and the insufficient regulation part is transferred to the new energy power stations with power generation capacity, so as to achieve the ideal regulation effect in a shorter cycle.

[0073] Step 4: Check whether the power generation capacity of the excluded aggregated electric field meets the power curtailment instruction value of the current cycle in each cycle, so as to restore the power generation control of the aggregated electric field with power generation capacity.

[0074] As an embodiment of the present invention, after the power limit instruction values continuously monitored twice are both greater than the power generation capacity of the current aggregated power plant, the power limit removal operation is automatically executed to resume the power generation control of the aggregated power plant.

[0075] Specifically, in this embodiment, the aggregated power plant with power generation capacity is resumed to power generation control according to the formulated recovery control strategy; wherein, the expression of the formulated recovery control strategy is as follows:

[0076]

[0077] In the formula, P i.A and P i.B are respectively the current power value of the aggregated power plant in the i-th region and the target value after resuming the execution of the power limit instruction; the aggregated power plant is an aggregated wind power plant or an aggregated photovoltaic power plant; K B is the recovery coefficient; P i.N and P j.N are the installed capacities of the i-th and j-th aggregated power plants that can resume the execution of the power limit instruction; ΔP is the total power limit value of the type to which the aggregated power plant belongs; ΔP 联 is the positive deviation power of the tie line; P i.Y and P j.Y are respectively the current power prediction values of the i-th and j-th aggregated power plants; n is the number of aggregated power plants that can execute the power limit.

[0078] For the recovery control in this embodiment: by verifying whether the recovery instruction meets the power generation capacity in each cycle, the power stations with power generation capacity are timely resumed to power generation, so that the power grid has more regulation space and regulation options, and it is avoided that the power stations without power generation capacity are mistakenly put into the regulation amount distribution calculation again.

[0079] The beneficial effects of the present invention are as follows compared with the prior art:

[0080] 1. Centralized new energy can generate electricity on a large scale in areas rich in energy resources to provide stable basic power supply for the power grid, and distributed new energy is close to users and can flexibly adjust its output according to the real-time needs of users and the operation status of the power grid; by aggregating distributed new energy and considering its volatility with centralized new energy and incorporating it into the active power control range as a whole on the main network side, the distributed power source and centralized new energy are coordinated to control, which can better meet the peak-valley changes of the power grid load, improve the peak shaving ability of the power system, reduce the system reserve capacity, and improve the energy utilization efficiency.

[0081] 2. By setting a reasonable wind-solar curtailment ratio T based on the proportion of wind power and photovoltaic installed capacity in each research area, the present invention allocates the adjustment amounts for the wind and solar power sources within the research area respectively, making the allocation of the two power sources more reasonable. By reasonably planning the allocation of wind-solar resources, it is beneficial to solve problems such as power imbalance and interaction of multi-time scale control strategies, and enriches the means of power grid regulation and peak shaving.

[0082] 3. In the curtailment control strategy formulated by the present invention, corresponding rewards and punishments are set for new energy power stations with insufficient power generation capacity, and the power stations with insufficient power generation capacity are promptly excluded from the scope of adjustment amount allocation, and the insufficient adjustment part is transferred to new energy power stations with power generation capacity, so that the power grid regulation can achieve the ideal adjustment effect in a shorter cycle; for the restoration control: by checking whether the restoration instruction meets the power generation capacity in each cycle, the power stations with power generation capacity are promptly restored to power generation, so that the power grid has more adjustment space and adjustment options, and avoids mis-including power stations without power generation capacity in the adjustment amount allocation calculation again; through the curtailment control and restoration control, the rapid response ability of new energy is maximally exerted, and the power generation efficiency is improved.

[0083] 4. The decentralized layout of distributed new energy makes it have higher elasticity and reliability in the face of natural disasters or power grid failures. After the present invention incorporates the distributed new energy into the main grid control system, when the main power grid fails, the distributed new energy system can continue to provide power supply for local areas, ensuring the uninterrupted operation of important loads. This "load off-grid" ability improves the reliability of the power system while providing more stable power services for users, and improves the power supply reliability and stability.

[0084] Embodiment 2:

[0085] As Figure 2 shown, the present invention provides a coordinated power generation control device for centralized and distributed new energy. The device is used to implement the steps of the method in Embodiment 1 above. Specifically, the device includes:

[0086] An aggregation module, which is used to aggregate the centralized power stations and distributed power stations of the two different power sources of wind and light as a whole within the scope of each area under the jurisdiction of the provincial main grid, to obtain the aggregated wind farms and aggregated photovoltaic farms in each area;

[0087] An allocation module, which is used to respectively count the sum of the outputs of the aggregated wind farms and aggregated photovoltaic farms in all areas, and combine the required new energy target output value of the current provincial main grid, and allocate the adjustment amounts of the wind and light power sources in the provincial area according to the formulated wind-solar curtailment ratio T, so as to obtain the curtailment instruction values of each aggregated wind farm and aggregated photovoltaic farm;

[0088] A power limit control module, which is used to perform corresponding power generation control on each aggregated power plant according to the power limit instruction value of each aggregated power plant, in accordance with the designed power limit control strategy, and exclude the aggregated power plants with insufficient power generation capacity from the distribution range of the adjustment amount;

[0089] A restoration control module, which is used to check whether the power generation capacity of the excluded aggregated power plant meets the power limit instruction value of the current period in each cycle, so as to restore the power generation control of the aggregated power plants with power generation capacity.

[0090] The coordinated power generation control device for centralized and distributed new energy provided by the embodiments of the present invention and the coordinated power generation control method for centralized and distributed new energy provided by Embodiment 1 are based on the same technical concept, can produce the beneficial effects described in Embodiment 1, and the content not described in detail in this embodiment can be referred to Embodiment 1.

[0091] Embodiment 3:

[0092] A terminal provided by an embodiment of the present invention includes a processor and a storage medium;

[0093] The storage medium is used to store instructions;

[0094] The processor is used to operate according to the instructions to execute the steps of the method described in any one of Embodiment 1.

[0095] Embodiment 4:

[0096] A computer-readable storage medium provided by an embodiment of the present invention, on which a computer program is stored, and when the program is executed by a processor, the steps of the method described in any one of Embodiment 1 are implemented.

[0097] The present disclosure may be a system, a method, and / or a computer program product. The computer program product may include a computer-readable storage medium having computer-readable program instructions thereon for causing a processor to implement various aspects of the present disclosure.

[0098] A computer-readable storage medium can be a tangible device that can retain and store instructions for use by an instruction execution device. A computer-readable storage medium can be, for example—but not limited to—an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium include: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), a static random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a digital versatile disc (DVD), a memory stick, a floppy disk, a mechanically encoded device such as a punched card or raised structures in grooves having instructions stored thereon, and any suitable combination of the foregoing. The computer-readable storage medium as used herein is not construed as being a transient signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagated through a waveguide or other transmission medium (e.g., an optical pulse through an optical fiber cable), or an electrical signal transmitted through a wire.

[0099] The computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to respective computing / processing devices, or can be downloaded to an external computer or an external storage device via a network, such as the Internet, a local area network, a wide area network, and / or a wireless network. The network can include a copper transmission cable, an optical fiber transmission, a wireless transmission, a router, a firewall, a switch, a gateway computer, and / or an edge server. A network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards the computer-readable program instructions for storage in a computer-readable storage medium in each of the computing / processing devices.

[0100] The computer program instructions for performing the operations of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine - related instructions, microcode, firmware instructions, state - setting data, or source code or object code written in any combination of one or more programming languages, including object - oriented programming languages such as Smalltalk, C++, etc., and conventional procedural programming languages such as the "C" language or similar programming languages. The computer - readable program instructions may be executed entirely on the user's computer, partially on the user's computer, executed as a stand - alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via an Internet service provider through the Internet). In some embodiments, by using the state information of the computer - readable program instructions to customize an electronic circuit, such as a programmable logic circuit, a field - programmable gate array (FPGA), or a programmable logic array (PLA), the electronic circuit can execute the computer - readable program instructions to implement various aspects of the present disclosure.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications or equivalent substitutions can still be made to the specific embodiments of the present invention. Any modification or equivalent substitution without departing from the spirit and scope of the present invention shall be covered by the protection scope of the claims of the present invention.

Claims

1. A method for controlling the coordinated power generation of centralized and distributed renewable energy, characterized in that: include: Step 1: Aggregate the centralized stations and distributed stations of wind and solar power sources in each region under the jurisdiction of the provincial main grid as a whole to obtain the aggregated wind farms and aggregated solar farms in each region; Step 2: Count the sum of the outputs of aggregated wind farms and aggregated photovoltaic farms in all regions respectively, and allocate the adjustment amount of wind and photovoltaic power sources in the provincial region according to the established wind-solar power restriction ratio T in combination with the target output value of new energy required by the current provincial main grid, so as to obtain the power restriction instruction value of each aggregated wind farm and aggregated photovoltaic farm; Step 3: According to the power limit instruction value of each aggregated electric field, the power generation control of each aggregated electric field is performed according to the designed power limit control strategy, and the aggregated electric field with insufficient power generation capacity is removed from the allocation range of the regulation amount; Step 4: Check in each cycle whether the power generation capacity of the eliminated aggregated electric field meets the power restriction instruction value of the current cycle, so as to restore the power generation control of the aggregated electric field with power generation capacity.

2. The method for controlling the coordinated power generation of centralized and distributed new energy sources according to claim 1 is characterized in that: In step 2, the expression for allocating the regulation amount of wind and solar power sources in the provincial region according to the established wind-solar power restriction ratio T is as follows: P X, Light = P wind + P light - P des, Total-P X, wind Where Pwind represents the sum of the outputs of all the aggregated wind farms in all regions, and Plight represents the sum of the outputs of all the aggregated photovoltaic farms in all regions; des, Total represents the target output value of new energy required by the current provincial main grid, T is the set wind and solar power restriction ratio; P X, Wind represents the regulation amount of wind power source; P X, Light represents the regulation amount of the light source.

3. The method for controlling the coordinated power generation of centralized and distributed new energy sources according to claim 1 or 2, characterized in that: In step 2, the step of obtaining the power restriction instruction value of each aggregated wind farm and aggregated photovoltaic farm includes: Calculate the difference between the sum of the outputs of the aggregated wind farms in all regions and the regulation amount of the allocated wind power sources to obtain the total wind power output target value of the wind power sources; Based on the capacity proportion of the aggregated wind farms in each region and their current active power, the total wind power output target value is decomposed into instructions to generate power restriction instruction values ​​for the aggregated wind farms in each region; The power restriction instruction value of the aggregated photovoltaic power plant in each region is generated according to the same principle as the above process of generating the power restriction instruction value of the aggregated wind farm in each region.

4. The method for controlling the coordinated power generation of centralized and distributed new energy sources according to claim 1, characterized in that: In step 3, the expression of the designed power-limiting control strategy is as follows: Where P i.B is the target value of the aggregated electric field in the ith region after executing its power-limiting instruction; P i.A K is the current output of the aggregated electric field i at the time of executing the power restriction instruction; the aggregated electric field is an aggregated wind field or an aggregated photovoltaic field; A is the power-limiting coefficient; ΔP is the total power-limiting value of the type of aggregated electric field; ΔP 联 is the positive deviation power of the tie line; n is the number of aggregated electric fields that can implement power restriction; P j.A is the output of the jth aggregated electric field that can execute the power restriction instruction before power restriction; K i is the penalty factor. During the power-limiting control process for the same batch, each aggregate electric field is given a set number of assessment opportunities, K i The value of increases with each periodic adjustment given for the assessment opportunity. When the current output of the aggregated electric field still cannot meet the control dead zone of the power-limiting instruction after X consecutive periodic adjustments and controls, the aggregated electric field is regarded as having insufficient power generation capacity and is excluded from the allocation range of the regulation amount.

5. The method for controlling the coordinated power generation of centralized and distributed new energy sources according to claim 4 is characterized in that: The value of the set number of times is X=3; The penalty factor is K i ={0|0.1|0.5|1.0}, that is: K i The initial default value is 0, K i The values ​​taken in the three tests were 0.1, 0.5 and 1.0 respectively.

6. The method for controlling the coordinated power generation of centralized and distributed new energy sources according to claim 4, characterized in that: The expression of the control dead zone is as follows: 0.95*P i.B.l ≤P i.A.l+1 ≤1.05*P i.B.l Where P i.B.l represents the target value of the aggregate electric field i after executing the power-limiting instruction of the lth assessment cycle; P i.A.l+1 It represents the current output of the aggregated electric field i when executing the power-limiting instruction in the l+1th assessment cycle.

7. The method for controlling the coordinated power generation of centralized and distributed new energy sources according to claim 1, characterized in that: The step 4 includes: controlling the power generation of the aggregated electric field with power generation capacity according to the established recovery control strategy; wherein the established recovery control strategy is expressed as follows: Where P i.A and P i.B The current power value of the aggregated electric field in the ith region and the target value after the power restriction instruction value is restored; the aggregated electric field is an aggregated wind farm or an aggregated photovoltaic farm; K B is the coefficient of restitution; P i.N and P j.N is the installed capacity of the i-th and j-th aggregated electric fields that can resume the execution of the power-limiting instruction; ΔP is the total power-limiting value of the type of aggregated electric field; ΔP 联 is the positive deviation power of the tie line; P i.Y and P j.Y are the current power prediction values ​​of the i-th and j-th aggregate electric fields respectively; P j.A is the current power value of the aggregated electric field in the jth region; n is the number of aggregated electric fields that can perform power restriction.

8. A centralized and distributed new energy coordinated power generation control device, which runs the centralized and distributed new energy coordinated power generation control method according to any one of claims 1 to 7, characterized in that: The device includes: Aggregation module, used to aggregate the centralized stations and distributed stations of wind and solar power sources in each region under the jurisdiction of the provincial main grid as a whole, to obtain the aggregated wind farm and aggregated photovoltaic farm in each region; The allocation module is used to separately count the sum of the outputs of aggregated wind farms and aggregated photovoltaic farms in all regions, and allocate the adjustment amount of wind and photovoltaic power sources in the provincial region according to the established wind-solar power restriction ratio T in combination with the target output value of new energy required by the current provincial main grid, so as to obtain the power restriction instruction value of each aggregated wind farm and aggregated photovoltaic farm; The power-limiting control module is used to perform corresponding power generation control on each aggregated electric field according to the power-limiting instruction value of each aggregated electric field and the designed power-limiting control strategy, and exclude the aggregated electric field with insufficient power generation capacity from the distribution range of the regulation amount; The recovery control module is used to check whether the power generation capacity of the eliminated aggregated electric field meets the power limit instruction value of the current cycle in each cycle, so as to restore the power generation control of the aggregated electric field with power generation capacity.

9. A terminal comprising a processor and a storage medium; characterized in that: The storage medium is used to store instructions; The processor is configured to operate according to the instructions to execute the steps of the method according to any one of claims 1-7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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