Power cooperative control method and system for new-energy power generation configured with energy storage

Abstract

Disclosed in the present invention are a power cooperative control method and system for new-energy power generation configured with energy storage. The method comprises: a power cooperative control system communicating with a station remote terminal unit (RTU) and a power prediction system, so as to receive related control instructions; then, performing calculation on the basis of different control function modes, so as to obtain an overall power control target instruction PΣ, and by means of an in-station apparatus and by using communication, forwarding same to a new-energy-power-generation-unit energy management system and an energy-storage energy management system, wherein the control function modes include four functions, namely, energy-storage-system AGC emergency direct adjustment and control, auxiliary-energy-storage-station primary frequency modulation control, auxiliary-energy-storage-station AGC control and auxiliary-energy-storage-station power prediction control. Automatic switching between multi-functional control modes is realized on the basis of the operation state of new-energy power generation and a change in a power grid operation requirement, thereby improving the active power adjustment performance of new-energy power generation and the value returns of an energy storage function, and ensuring the safe and stable operation of a power grid.

Description

A method and system for collaborative control of energy storage power in a new energy power generation configuration Technical Field

[0001] The present invention belongs to the technical field of renewable energy power generation, and specifically relates to a method and system for collaborative control of energy storage power configured with renewable energy power generation. Background Art

[0002] Against the backdrop of the "dual carbon" goals, the large-scale integration of renewable energy into the power grid presents challenges to the safe and stable operation of the grid due to its discontinuous and unstable non-steady-state characteristics. New energy storage technologies, with their advantages such as flexible regulation, are becoming a key component in building a new power system and promoting a green and low-carbon energy transition. Energy storage systems combined with renewable energy generation can improve the output characteristics of renewable energy generation, thereby alleviating the uneven distribution of power in the power system over time and space, thereby ensuring a stable power supply and increasing the utilization rate of renewable energy generation.

[0003] Currently, many regions in China have clearly established requirements for the configuration of energy storage capacity for grid-connected centralized renewable energy generation. However, the deployment of energy storage for renewable energy generation is still in its early stages, and some regions face the problem of "built but unused" systems. Guided by existing market mechanisms, the combined operation of renewable energy generation and energy storage systems can generate economic benefits from ancillary services by improving power forecast accuracy and enhancing the performance of station-based AGC and primary frequency regulation. However, most projects only implement a single functional regulation function, failing to fully consider the impact of renewable energy generation operating conditions and changes in grid operating requirements on energy storage utilization. This inability to fully leverage the value of energy storage's multiple reuse functions, which would diversify renewable energy generation revenue channels and maximize the value of energy storage functions.

[0004] Therefore, how to carry out multifunctional and efficient coordinated control of energy storage supporting new energy power generation has become a technical problem that needs to be solved.

[0005] Summary of the Invention

[0006] Purpose: In view of at least one of the above technical problems, the present invention provides a method and system for collaborative control of energy storage power configured with renewable energy power generation, which realizes automatic switching of multi-functional control modes based on the operating status of renewable energy power generation and changes in grid operation requirements, improves the active power regulation performance of renewable energy power generation and the value benefits of energy storage functions, and ensures the safe and stable operation of the grid.

[0007] Technical solution: To solve the above technical problems, the technical solution adopted by the present invention is:

[0008] In a first aspect, the present invention provides a method for collaboratively controlling energy storage power in a renewable energy power generation configuration, comprising:

[0009] Step 1: The power collaborative control system communicates with the station remote communication terminal RTU and the power prediction system to receive relevant control instructions; then calculates the power control total target instruction P according to different control function modes. Σ , forwarded to the energy management system of the new energy power generation unit and the energy storage energy management system by means of communication through the in-station device; wherein the control function mode includes four functions: AGC emergency direct regulation control of the energy storage system, primary frequency regulation control of the energy storage auxiliary station, AGC control of the energy storage auxiliary station, and power prediction control of the energy storage auxiliary station;

[0010] Step 2: Dynamically collect current and voltage data at the grid connection points of the new energy station and the energy storage system, calculate the active power of the grid connection points, grid frequency, and the active power of the grid connection points of the energy storage system in real time, and send the data to the synchronous phasor measurement unit (PMU) substation of the new energy station. The data is then directly uploaded to the dispatching PMU master station via the PMU substation for evaluation and calculation of the station-wide AGC, primary frequency regulation, power forecast, and emergency direct control performance of the energy storage system AGC.

[0011] Step 3: The power coordination control system involves designing four functions: emergency direct regulation control of the energy storage system AGC, primary frequency regulation control of the energy storage auxiliary station, AGC control of the energy storage auxiliary station, and power prediction control of the energy storage auxiliary station. Multiple functional modules are deployed individually or simultaneously according to the operating requirements of the new energy station. The system automatically switches functions according to the operating status of the new energy power generation and changes in the grid operation requirements.

[0012] Step 4: Under different control function modes, the power collaborative control system can automatically optimize and distribute the power to the energy management system of each power generation unit according to the operating status of the new energy power generation unit and energy storage. Each power generation unit energy management system can quickly receive and execute power control instructions, realizing the coordinated control of power regulation between the new energy station and the energy storage system. The control function mode includes four functions: energy storage system AGC emergency direct regulation control, energy storage auxiliary station primary frequency regulation control, energy storage auxiliary station AGC control, and energy storage auxiliary station power prediction control.

[0013] Step 5: The power cooperative control system sends the control instruction P to the energy storage energy management system. ES It should be constrained by the regulation capability of the energy storage system and the capacity of the primary equipment within the station to avoid the energy storage system's regulation speed being unable to track rapid changes in active power instructions, and to avoid safety problems in the energy storage system and new energy stations.

[0014] In some embodiments, step 1 includes:

[0015] The power cooperative control system receives the remote control command signals for the whole-station AGC control and the energy storage system AGC emergency direct control control issued by the dispatching master station through the station telecontrol terminal RTU device, as well as the remote control command signals for the whole-station AGC control and the energy storage system AGC emergency direct control request input.

[0016] According to the relevant control function requirements, the power control total target instruction P is formed Σ ;

[0017] The power cooperative control system sets the total power control target instruction P Σ Calculation and allocation are carried out and sent to the energy management system of the new energy power generation unit and the energy storage energy management system. Each energy management system then controls the wind turbines, photovoltaic inverters and energy storage PCS equipment in the station to ultimately achieve rapid power regulation.

[0018] In some embodiments, step 3 includes: designing a power coordinated control system including four functions: energy storage system AGC emergency direct regulation control, energy storage auxiliary station primary frequency regulation control, energy storage auxiliary station AGC control, and energy storage auxiliary station power prediction control;

[0019] When more than two functions are put into operation, the system executes them in the order of priority: energy storage system AGC emergency direct regulation control > energy storage auxiliary station primary frequency regulation control > energy storage auxiliary station AGC control > energy storage auxiliary station power prediction control.

[0020] Furthermore, in some embodiments, after the AGC emergency direct regulation control function of the energy storage system is put into operation, the power cooperative control system sends a "AGC emergency direct regulation control function of the energy storage system has been put into operation" signal to the dispatching master station through the station RTU, which indicates that the new energy station energy storage system has the ability to be put into emergency direct regulation by the AGC of the power grid dispatching organization; when the power grid fails or there is an operation risk, the dispatching master station sends a "AGC emergency direct regulation request for energy storage system put into operation" signal through the station RTU according to the status information sent by the energy storage system. After the power cooperative control system receives the "AGC emergency direct regulation request for energy storage system put into operation" instruction, the new energy station operator operates the AGC emergency direct regulation function switch button of the energy storage system in the system again, and the power cooperative control system enters the AGC emergency direct regulation control mode of the energy storage system, and controls the remote regulation instruction P according to the AGC control remote regulation instruction P of the energy storage system. agc The energy storage system control target instruction P is calculated by the active power P0' of the grid connection point in the energy storage system station ES , ensuring the safe and stable operation of the power grid.

[0021] Furthermore, in some embodiments, in the energy storage auxiliary station AGC control mode, the power cooperative control system is based on the whole station AGC control instruction P AGCThe total target power control instruction P is calculated by calculating the active power P0 of the whole station grid connection point and the active power P0 of the new energy station. Σ ; Set the power control total target instruction P Σ Prioritize the optimization of allocation to the energy management system of the new energy power generation unit for active power regulation, monitor the active power output of the new energy station in real time, and dynamically correct the control instructions P sent to the energy storage energy management system. ES =P Σ -P0", improves the AGC control response speed and accuracy of the entire station through rapid adjustment of the energy storage system.

[0022] Furthermore, in some embodiments, the energy storage assists the station in primary frequency regulation control mode:

[0023] When the grid system frequency is abnormal, the power cooperative control system calculates the primary frequency regulation load instruction ΔP according to the grid frequency measurement value f measured at the grid connection points of the entire station and the active power-frequency droop control:

[0024] Where: ΔP is the primary frequency modulation power instruction (MW), f d is the primary frequency modulation dead zone, P N is the rated power of the new energy station (MW), f N is the rated frequency of the power grid system (Hz), δ is the regulation rate (%), and f is the measured value of the power grid frequency;

[0025] According to the primary frequency regulation load instruction ΔP and the whole station AGC control instruction, the total power control target instruction P is calculated. Σ ;

[0026] The power cooperative control system gives priority to the power control total target instruction P Σ Optimize the allocation to the energy management system of the new energy power generation unit for active power regulation, monitor the active power output of the new energy station in real time, and dynamically correct the control instructions P sent to the energy storage energy management system ES =P Σ -P0", the rapid adjustment of the energy storage system is used to assist in achieving a rapid response to the frequency regulation of the entire station.

[0027] Furthermore, if the energy storage system capacity meets the primary frequency regulation capacity requirement, the power cooperative control system independently responds to the primary frequency regulation load instruction ΔP, specifically including:

[0028] During the primary frequency regulation operation, the new energy generation unit blocks the load change, and the energy storage system performs a single frequency regulation dynamic response P ES =ΔP, giving full play to the millimeter-level rapid response capability of energy storage, which can effectively reduce the mechanical wear and power loss caused by the frequent participation of new energy power generation in the primary frequency regulation of the power grid.

[0029] Furthermore, in some embodiments, after the energy storage auxiliary station power prediction control function is put into operation, when the new energy station AGC is operating in the free power generation mode, the power cooperative control system automatically enters the energy storage auxiliary station power prediction control mode;

[0030] The power cooperative control system and the power prediction system communicate in real time using SFTP. The power cooperative control system receives the information transmitted by the power prediction system and reads the power prediction value P forecast As the power control target instruction P Σ The energy storage system realizes accurate power prediction and tracking and bidirectional energy output according to the actual power input of renewable energy power generation. ES =P forecast -P Collecting line At the same time, the power cooperative control system converts the active power P of the new energy generation collection line Collecting line It is superimposed with the active power P0' of the energy storage grid connection point and sent to the dispatching master station as the calculated value for the power forecast assessment of the entire station.

[0031] In some embodiments, step 5, the power cooperative control system sends a control instruction P to the energy storage energy management system. ES It should be subject to the regulation capability of the energy storage system and the capacity of the primary equipment within the station, including:

[0032] The power cooperative control system obtains the energy storage system capacity and primary equipment capacity status information from the energy storage energy management system;

[0033] According to the capacity of the energy storage system and the capacity status information of the primary equipment, the maximum allowable charging power value P of the energy storage system is calculated. max-c and the maximum allowable discharge power of the energy storage system P max-f ;

[0034] The control instructions of the energy storage energy management system should meet P max-c ≤P ES ≤P max-f , to avoid the energy storage system's adjustment speed being unable to track the rapid changes in active power instructions, and to avoid safety problems in the energy storage system and new energy stations.

[0035] In a second aspect, the present invention provides a new energy power generation configuration energy storage power collaborative control system, including a power collaborative control system; the power collaborative control system is deployed on the upper layer of the new energy power generation unit energy management system and the energy storage energy management system, and the power collaborative control system respectively interacts with the station RTU, the new energy power generation unit energy management system and the energy storage energy management system, and is connected to the new energy station power prediction system; and also includes a processor and a storage medium;

[0036] The storage medium is used to store instructions;

[0037] The processor is configured to operate according to the instructions to execute the steps of the method according to the first aspect.

[0038] The power cooperative control system is configured as follows:

[0039] Dynamically collect current and voltage at the grid connection point of new energy stations, calculate active power and grid frequency at the grid connection point in real time, receive station-wide automatic power generation control (AGC) instructions from the dispatching master station via the station RTU, and dynamically adjust the energy storage power control target value based on the operating status of the new energy power generation unit, thereby helping to improve the power regulation performance of the entire station.

[0040] Based on the measured grid frequency, the primary frequency regulation control instructions are dynamically calculated to assist the entire station in quickly participating in the grid primary frequency regulation response;

[0041] Obtain power forecast target values ​​from the power forecast system of new energy stations. When the new energy stations are in free power generation mode, smooth the active power output of the new energy stations, assist in improving power forecast accuracy, and reduce the power forecast deviation assessment of the entire station;

[0042] Dynamically collects current and voltage at the grid connection point within the energy storage system, calculates the active power of the energy storage system grid connection point in real time, and receives the energy storage system AGC emergency direct adjustment control instructions issued by the dispatching master station through the remote communication terminal RTU. In special circumstances of power grid operation, it participates in the grid AGC emergency direct adjustment to ensure safe and stable operation of the power grid;

[0043] The power collaborative control system generates power control instructions for the energy storage system through four methods: the dispatching master station, the power prediction system of the new energy station, or local calculation, thereby effectively improving the active power regulation performance of the power grid.

[0044] In a third aspect, the present invention provides a storage medium having a computer program stored thereon, which implements the steps of the method described in the first aspect when executed by a processor.

[0045] In a fourth aspect, the present invention provides a device comprising:

[0046] One or more processors, one or more memories, and one or more programs, wherein the one or more programs are stored in the one or more memories and configured to be executed by the one or more processors, and the one or more programs include instructions for executing any of the methods described in the first aspect.

[0047] Beneficial effects: The method, device, equipment and storage medium for collaborative control of energy storage power configured with new energy power generation provided by the present invention have the following advantages: In view of the current situation that the supporting energy storage application mode on the new energy station side is single and the economy is not high, the present invention utilizes the advantages of energy storage such as rapid response, precise tracking and two-way energy output to assist new energy stations in greatly improving power regulation performance, compensating for the impact and influence of fluctuations in new energy power generation on the power grid, and effectively improving the economic benefits obtained by new energy stations when participating in power grid AGC, primary frequency regulation, and power forecast assessment, thereby realizing the diversification of new energy power generation revenue channels and maximizing the value of energy storage functions, which is of great significance to improving network source coordination capabilities and ensuring the safe and stable operation of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] FIG1 is a schematic diagram of the topology architecture of a coordinated control system for energy storage power regulation on the new energy side according to an embodiment of the present invention;

[0049] FIG2 is a schematic diagram of information collection of energy storage grid connection points on the new energy side according to an embodiment of the present invention;

[0050] FIG3 is a schematic diagram of a control strategy for a coordinated control function of energy storage power on the new energy side according to an embodiment of the present invention. DETAILED DESCRIPTION

[0051] The present invention will be further described below in conjunction with the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention.

[0052] In the description of the present invention, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0053] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0054] Example 1

[0055] As shown in Figure 1, a new energy-energy storage power collaborative control system is established in the new energy station. This system is deployed on the upper layer of the new energy power generation unit energy management system and the energy storage energy management system. It dynamically collects the current and voltage of the new energy station grid connection point, calculates the active power and grid frequency of the grid connection point in real time, and receives the full-station AGC (Automatic Generation Control) issued by the dispatching master station through the RTU (Remote Terminal Unit). The system dynamically adjusts the energy storage power control target value based on the operating status of the renewable energy generation units, helping to improve the power regulation performance of the entire station. The system also dynamically calculates primary frequency regulation control commands based on the measured grid frequency, helping the entire station quickly participate in the grid's primary frequency regulation response. The system also obtains power forecast target values ​​from the renewable energy station power forecasting system. When the renewable energy station is in free generation mode, it smoothes the active power output of the renewable energy station, helping to improve power forecast accuracy and reduce deviations in the overall power forecast assessment. Furthermore, the system dynamically collects current and voltage at the energy storage system's grid connection point within the station, calculating the active power of the energy storage system in real time. It receives emergency AGC direct regulation control commands from the dispatching master station via the RTU. Under special circumstances, the system participates in emergency AGC direct regulation to ensure safe and stable grid operation. Overall, this method enables the power collaborative control system to generate energy storage system power control commands from four sources: the dispatching master station, the renewable energy station power forecasting system, or local calculations, effectively improving the grid's active power regulation performance.

[0056] A method for collaboratively controlling energy storage power in a renewable energy power generation configuration includes:

[0057] Step 1: The power collaborative control system communicates with the station remote communication terminal RTU and the power prediction system to receive relevant control instructions; then calculates the power control total target instruction P according to different control function modes. Σ , forwarded to the energy management system of the new energy power generation unit and the energy storage energy management system through the communication method of the station device; wherein the control function mode includes four functions: AGC emergency direct regulation control of the energy storage system, primary frequency regulation control of the energy storage auxiliary station, AGC control of the energy storage auxiliary station, and power prediction control of the energy storage auxiliary station;

[0058] Step 2: Dynamically collect current and voltage data at the grid connection points of the new energy station and the energy storage system, calculate the active power of the grid connection points, grid frequency, and the active power of the grid connection points of the energy storage system in real time, and send the data to the synchronous phasor measurement unit (PMU) substation of the new energy station. The data is then directly uploaded to the dispatching PMU master station via the PMU substation for evaluation and calculation of the station-wide AGC, primary frequency regulation, power forecast, and emergency direct control performance of the energy storage system AGC.

[0059] Step 3: The power coordination control system involves designing four functions: emergency direct regulation control of the energy storage system AGC, primary frequency regulation control of the energy storage auxiliary station, AGC control of the energy storage auxiliary station, and power prediction control of the energy storage auxiliary station. Multiple functional modules are deployed individually or simultaneously according to the operating requirements of the new energy station. The system automatically switches functions according to the operating status of the new energy power generation and changes in the grid operation requirements.

[0060] Step 4: Under different control function modes, the power collaborative control system can automatically optimize and distribute the power to the energy management system of each power generation unit according to the operating status of the new energy power generation unit and energy storage. Each power generation unit energy management system can quickly receive and execute power control instructions, realizing the coordinated control of power regulation between the new energy station and the energy storage system. The control function mode includes four functions: energy storage system AGC emergency direct regulation control, energy storage auxiliary station primary frequency regulation control, energy storage auxiliary station AGC control, and energy storage auxiliary station power prediction control.

[0061] Step 5: The power cooperative control system sends the control instruction P to the energy storage energy management system. ES It should be constrained by the regulation capability of the energy storage system and the capacity of the primary equipment within the station to avoid the energy storage system's regulation speed being unable to track rapid changes in active power instructions, and to avoid safety problems in the energy storage system and new energy stations.

[0062] In some embodiments, step 1 includes:

[0063] The power cooperative control system receives the remote control command signals for the whole-station AGC control, the energy storage system AGC emergency direct adjustment control, the whole-station AGC request activation, and the energy storage system AGC emergency direct adjustment request activation from the dispatching master station through the station telecontrol terminal RTU device via the IEC104 protocol and other means;

[0064] According to the relevant control function requirements, the power control total target instruction P is formed Σ ;

[0065] The power cooperative control system sets the total power control target instruction P Σ Calculation and allocation are carried out, and the data is quickly sent to the energy management system of the new energy power generation unit and the energy storage energy management system through communication protocols such as GOOSE. Each energy management system then controls the wind turbines, photovoltaic inverters, energy storage PCS and other equipment in the station to ultimately achieve rapid power regulation.

[0066] Step 2 is shown in Figure 2. The power coordination control system dynamically collects current and voltage information from all grid-connected points of the renewable energy station and the grid-connected points within the energy storage system. It calculates the active power and frequency of all grid-connected points of the station, as well as the active power of the grid-connected points within the energy storage system, in real time. This information is sent to the PMU substation of the renewable energy station using the 26865.2 protocol or 4-20mA hard wiring. The information is then directly uploaded to the dispatching WAMS master station through the PMU substation for performance evaluation and calculation of the station-wide AGC, primary frequency regulation, power forecasting, and the emergency direct regulation control performance of the energy storage system AGC.

[0067] In some embodiments, step 3 includes: designing a power coordinated control system including four functions: energy storage system AGC emergency direct regulation control, energy storage auxiliary station primary frequency regulation control, energy storage auxiliary station AGC control, and energy storage auxiliary station power prediction control;

[0068] When more than two functions are put into operation, the system executes them in the order of priority: energy storage system AGC emergency direct regulation control > energy storage auxiliary station primary frequency regulation control > energy storage auxiliary station AGC control > energy storage auxiliary station power prediction control.

[0069] Furthermore, in some embodiments, after the AGC emergency direct regulation control function of the energy storage system is put into operation, the power cooperative control system sends a "AGC emergency direct regulation control function of the energy storage system has been put into operation" signal to the dispatching master station through the station RTU, which indicates that the new energy station energy storage system has the ability to be put into emergency direct regulation by the AGC of the power grid dispatching organization; when the power grid fails or there is an operation risk, the dispatching master station sends a "AGC emergency direct regulation request for energy storage system put into operation" signal through the station RTU according to the status information sent by the energy storage system. After the power cooperative control system receives the "AGC emergency direct regulation request for energy storage system put into operation" instruction, the new energy station operator operates the AGC emergency direct regulation function switch button of the energy storage system in the system again, and the power cooperative control system enters the AGC emergency direct regulation control mode of the energy storage system, and controls the remote regulation instruction P according to the AGC control remote regulation instruction P of the energy storage system. agc The energy storage system control target instruction P is calculated by the active power P0' of the grid connection point in the energy storage system station ES , ensuring the safe and stable operation of the power grid.

[0070] Furthermore, in some embodiments, in the energy storage auxiliary station AGC control mode, the power cooperative control system is based on the whole station AGC control instruction P AGC The total target power control instruction P is calculated by calculating the active power P0 of the whole station grid connection point and the active power P0 of the new energy station. Σ ; Set the power control total target instruction P ΣPrioritize the optimization of allocation to the energy management system of the new energy power generation unit for active power regulation, monitor the active power output of the new energy station in real time, and dynamically correct the control instructions P sent to the energy storage energy management system. ES =P Σ -P0", improves the AGC control response speed and accuracy of the entire station through rapid adjustment of the energy storage system.

[0071] Furthermore, in some embodiments, the energy storage assists the station in primary frequency regulation control mode:

[0072] When the grid system frequency is abnormal, the power cooperative control system calculates the primary frequency regulation load instruction ΔP according to the grid frequency measurement value f measured at the grid connection points of the entire station and the active power-frequency droop control:

[0073] Where: ΔP is the primary frequency modulation power instruction (MW), f d is the primary frequency modulation dead zone, P N is the rated power of the new energy station (MW), f N is the rated frequency of the power grid system (Hz), δ is the regulation rate (%), and f is the measured value of the power grid frequency;

[0074] According to the primary frequency regulation load instruction ΔP and the whole station AGC control instruction, the total power control target instruction P is calculated. Σ ;

[0075] The power cooperative control system gives priority to the power control total target instruction P Σ Optimize the allocation to the energy management system of the new energy power generation unit for active power regulation, monitor the active power output of the new energy station in real time, and dynamically correct the control instructions P sent to the energy storage energy management system ES =P Σ -P0", the rapid adjustment of the energy storage system is used to assist in achieving a rapid response to the frequency regulation of the entire station.

[0076] Furthermore, if the energy storage system capacity meets the primary frequency regulation capacity requirement, the power cooperative control system independently responds to the primary frequency regulation load instruction ΔP, specifically including:

[0077] During the primary frequency regulation operation, the new energy generation unit blocks the load change, and the energy storage system performs a single frequency regulation dynamic response P ES =ΔP, giving full play to the millimeter-level rapid response capability of energy storage, which can effectively reduce the mechanical wear and power loss caused by the frequent participation of renewable energy power generation in the primary frequency regulation of the power grid. Furthermore, in some embodiments, after the energy storage auxiliary station power prediction control function is put into use, when the renewable energy station AGC is operating in the free power generation mode, the power coordination control system automatically enters the energy storage auxiliary station power prediction control mode;

[0078] The power cooperative control system and the power prediction system communicate in real time using SFTP. The power cooperative control system receives the information transmitted by the power prediction system and reads the power prediction value P forecast As the power control target instruction P Σ The energy storage system realizes accurate power prediction and tracking and bidirectional energy output according to the actual power input of renewable energy power generation. ES =P forecast -P Collecting line At the same time, the power cooperative control system converts the active power P of the new energy generation collection line Collecting line It is superimposed with the active power P0' of the energy storage grid connection point and sent to the dispatching master station as the calculated value for the power forecast assessment of the entire station.

[0079] In the assessment of power auxiliary services, power forecast assessment can usually be divided into different assessment methods such as medium-term and ultra-short-term. The power cooperative control system adopts a multi-objective optimization algorithm according to different grid assessment requirements and assessment calculation methods under different assessment methods to automatically optimize the power control total target instruction P. Σ , helping to minimize the power forecast assessment of new energy sites.

[0080] Figure 3 shows the calculation and automatic switching of the total power control target command under the different control function modes described in step 4. When no coordinated control function is engaged, the power coordinated control system is in local control mode. Operators can manually set and issue power control commands to the energy management system of each power generation unit, enabling flexible power regulation and control at the new energy station when some power generation units fail or are undergoing maintenance.

[0081] In some embodiments, in step 5, to ensure the safety of the energy storage system during rapid power regulation, the power cooperative control system sends a control instruction P to the energy storage energy management system. ES It should be subject to the regulation capability of the energy storage system and the capacity of the primary equipment within the station, including:

[0082] The power cooperative control system obtains the energy storage system capacity and primary equipment capacity status information from the energy storage energy management system;

[0083] According to the capacity of the energy storage system and the capacity status information of the primary equipment, the maximum allowable charging power value P of the energy storage system is calculated. max-c and the maximum allowable discharge power of the energy storage system P max-f ;

[0084] The control instructions of the energy storage energy management system should meet P max-c ≤P ES ≤P max-f, to avoid the energy storage system's adjustment speed being unable to track the rapid changes in active power instructions, and to avoid safety problems in the energy storage system and new energy stations.

[0085] The technology of the present invention can take advantage of the rapid response, precise tracking and bidirectional energy output of energy storage, assist new energy sites to greatly improve the power regulation performance, compensate for the impact and influence of fluctuations in new energy power generation on the power grid, and effectively improve the economic benefits obtained by new energy sites when participating in the power grid AGC, primary frequency regulation, and power forecast assessment, thereby achieving the diversification of new energy power generation revenue channels and maximizing the value of energy storage functions. It is of great significance to improving the network source coordination capability and ensuring the safe and stable operation of the power grid.

[0086] Example 2

[0087] In a second aspect, as shown in FIG1 , this embodiment provides a new energy power generation configuration energy storage power collaborative control system, including a power collaborative control system; the power collaborative control system is deployed on the upper layer of the new energy power generation unit energy management system and the energy storage energy management system, and the power collaborative control system respectively interacts with the station RTU, the new energy power generation unit energy management system, and the energy storage energy management system, and is connected to the new energy station power prediction system; and further includes a processor and a storage medium;

[0088] The storage medium is used to store instructions;

[0089] The processor is configured to operate according to the instructions to execute the steps of the method according to the first aspect.

[0090] The power cooperative control system is configured as follows:

[0091] Dynamically collect current and voltage at the grid connection point of new energy stations, calculate active power and grid frequency at the grid connection point in real time, receive station-wide automatic power generation control (AGC) instructions from the dispatching master station via the station RTU, and dynamically adjust the energy storage power control target value based on the operating status of the new energy power generation unit, thereby helping to improve the power regulation performance of the entire station.

[0092] Based on the measured grid frequency, the primary frequency regulation control instructions are dynamically calculated to assist the entire station in quickly participating in the grid primary frequency regulation response;

[0093] Obtain power forecast target values ​​from the power forecast system of new energy stations. When the new energy stations are in free power generation mode, smooth the active power output of the new energy stations, assist in improving power forecast accuracy, and reduce the power forecast deviation assessment of the entire station;

[0094] Dynamically collects current and voltage at the grid connection point within the energy storage system, calculates the active power of the energy storage system grid connection point in real time, and receives the energy storage system AGC emergency direct adjustment control instructions issued by the dispatching master station through the remote communication terminal RTU. In special circumstances of power grid operation, it participates in the grid AGC emergency direct adjustment to ensure safe and stable operation of the power grid;

[0095] The power collaborative control system generates power control instructions for the energy storage system through four methods: the dispatching master station, the power prediction system of the new energy station, or local calculation, thereby effectively improving the active power regulation performance of the power grid.

[0096] Example 3

[0097] In a third aspect, this embodiment provides a storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the method described in Example 1 are implemented.

[0098] Example 4

[0099] In a fourth aspect, the present invention provides a device comprising:

[0100] One or more processors, one or more memories, and one or more programs, wherein the one or more programs are stored in the one or more memories and are configured to be executed by the one or more processors, and the one or more programs include instructions for executing any of the methods described in Example 1.

[0101] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0102] The present application is described with reference to the flow chart and / or block diagram of the method, device (system), and computer program product according to the embodiment of the present application. It should be understood that each flow process and / or box in the flow chart and / or block diagram and the combination of the flow process and / or box in the flow chart and / or block diagram can be realized by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processing machine or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for realizing the function specified in one flow chart flow or multiple flows and / or one box or multiple boxes of the block diagram.

[0103] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0104] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0105] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for coordinated control of energy storage power in a renewable energy power generation configuration, characterized in that: include: Step 1: The power coordinated control system communicates with the station remote communication terminal RTU and the power prediction system to receive relevant control instructions; then the total power control target instruction P is calculated according to different control function modes. Σ , forwarded to the energy management system of the new energy power generation unit and the energy storage energy management system by means of communication through the in-station device; wherein the control function mode includes four functions: AGC emergency direct regulation control of the energy storage system, primary frequency regulation control of the energy storage auxiliary station, AGC control of the energy storage auxiliary station, and power prediction control of the energy storage auxiliary station; Step 2: Dynamically collect the current and voltage of the grid connection point of the new energy station and the grid connection point of the energy storage system, calculate the active power of the grid connection point of the new energy station, the grid frequency and the active power of the grid connection point of the energy storage system in real time, and send them to the synchronous phasor measurement unit PMU substation of the new energy station. The substation is directly uploaded to the dispatching PMU master station through the PMU substation for the evaluation and calculation of the whole station AGC, primary frequency regulation, power prediction and energy storage system AGC emergency direct regulation control performance; Step 3: The power coordination control system involves designing four functions, including the AGC emergency direct regulation control of the energy storage system, the primary frequency regulation control of the energy storage auxiliary station, the AGC control of the energy storage auxiliary station, and the power prediction control of the energy storage auxiliary station. Multiple functional modules are put into use separately or simultaneously according to the operation requirements of the new energy station. The system automatically switches functions according to the operation status of the new energy power generation and the changes in the operation requirements of the power grid. Step 4: Under different control function modes, the power cooperative control system can automatically optimize and distribute the power to the energy management system of each power generation unit according to the operating status of the new energy power generation unit and the energy storage. The energy management system of each power generation unit can quickly receive and execute the power control command to achieve the coordinated control of the power regulation of the new energy station and the energy storage system; wherein the control function mode includes four functions: AGC emergency direct regulation control of the energy storage system, primary frequency regulation control of the energy storage auxiliary station, AGC control of the energy storage auxiliary station, and power prediction control of the energy storage auxiliary station; Step 5: The power cooperative control system sends the control instruction P to the energy storage energy management system. ES It should be constrained by the regulation capability of the energy storage system and the capacity of the primary equipment within the station to avoid the energy storage system regulation speed being unable to track the rapid changes in active power instructions and to avoid safety problems in the energy storage system and new energy stations.

2. The method for coordinated control of energy storage power in renewable energy power generation configuration according to claim 1 is characterized in that: The step 1 comprises: The power cooperative control system receives the remote control command signals of the whole station AGC control, the energy storage system AGC emergency direct control control, the whole station AGC request input, and the energy storage system AGC emergency direct control request input from the dispatching master station through the station telecontrol terminal RTU device; According to the relevant control function requirements, the power control total target instruction P is formed Σ ; The power cooperative control system is responsible for the overall power control target instruction P Σ Calculation and allocation are performed and sent to the energy management system of the new energy power generation unit and the energy storage energy management system. Each energy management system then controls the wind turbines, photovoltaic inverters and energy storage PCS equipment in the station to ultimately achieve rapid power regulation.

3. The method for coordinated control of energy storage power in renewable energy power generation configuration according to claim 1 is characterized in that: Step 3 includes: the design of power coordinated control system includes four functions: AGC emergency direct regulation control of energy storage system, primary frequency regulation control of energy storage auxiliary station, AGC control of energy storage auxiliary station, and power prediction control of energy storage auxiliary station; When more than two functions are put into operation, the system executes in the priority order of energy storage system AGC emergency direct control > energy storage auxiliary station primary frequency regulation control > energy storage auxiliary station AGC control > energy storage auxiliary station power prediction control.

4. The method for coordinated control of energy storage power in renewable energy power generation configuration according to claim 3 is characterized in that: After the AGC emergency direct control function of the energy storage system is put into operation, the power cooperative control system sends the "AGC emergency direct control function of the energy storage system has been put into operation" signal to the dispatching master station through the station RTU. This signal indicates that the energy storage system of the new energy station has the ability to be emergency directly adjusted by the AGC of the power grid dispatching organization; when the power grid fails or there is an operation risk, the dispatching master station sends the "AGC emergency direct adjustment request for the energy storage system" signal through the station RTU according to the status information sent by the energy storage system. After the power cooperative control system receives the "AGC emergency direct adjustment request for the energy storage system", the new energy station operator operates the AGC emergency direct adjustment function switch button of the energy storage system in the system again, and the power cooperative control system enters the AGC emergency direct adjustment control mode of the energy storage system. According to the AGC remote adjustment command P of the energy storage system, the power cooperative control system agc The energy storage system control target instruction P is calculated by the active power P0' of the energy storage system station and the grid connection point ES , ensuring the safe and stable operation of the power grid.

5. The method for coordinated control of energy storage power in renewable energy power generation configuration according to claim 3 is characterized in that: In the energy storage auxiliary station AGC control mode, the power cooperative control system follows the AGC control instruction P of the whole station. AGC , the active power P0 of the whole station and the active power P0 of the new energy station are calculated to obtain the total target power control instruction P Σ ; Set the power control total target instruction P Σ Prioritize the optimization of allocation to the energy management system of the new energy power generation unit for active power regulation, monitor the active power output of the new energy station in real time, and dynamically correct the control instructions P sent to the energy storage energy management system ES =P Σ -P0", improves the AGC control response speed and accuracy of the entire station through rapid adjustment of the energy storage system.

6. The method for coordinated control of energy storage power in renewable energy power generation configuration according to claim 3 is characterized in that: Energy storage auxiliary station primary frequency regulation control mode: When the power grid system frequency is abnormal, the power cooperative control system calculates the primary frequency regulation load instruction ΔP according to the power grid frequency measurement value f measured at the grid connection points of the entire station and the active power-frequency droop control: Where: ΔP is the primary frequency modulation power command, f d is the primary frequency modulation dead zone, P N is the rated power of the new energy station, f N is the rated frequency of the power grid system, δ is the modulation rate, and f is the measured value of the power grid frequency; According to the primary frequency regulation load instruction ΔP and the whole station AGC control instruction, the total power control target instruction P is calculated. Σ ; The power cooperative control system gives priority to the power control total target instruction P Σ Optimize the allocation to the energy management system of the new energy power generation unit for active power regulation, monitor the active power P0" output of the new energy station in real time, and dynamically correct the control instructions P0" sent to the energy storage energy management system ES =P Σ -P0", the rapid adjustment of the energy storage system is used to assist in achieving rapid response of the primary frequency regulation of the entire station.

7. The method for coordinated control of energy storage power in renewable energy power generation configuration according to claim 6 is characterized in that: If the energy storage system capacity meets the primary frequency regulation capacity requirements, the power cooperative control system responds to the primary frequency regulation load command ΔP independently, including: During the primary frequency regulation action, the new energy generation unit blocks the load change, and the energy storage system performs a frequency regulation dynamic response P alone. ES =ΔP, giving full play to the millimeter-level rapid response capability of energy storage, can effectively reduce the mechanical wear and power loss caused by the frequent participation of new energy power generation in the primary frequency regulation of the power grid.

8. The method for coordinated control of energy storage power in renewable energy power generation configuration according to claim 3 is characterized in that: After the power prediction control function of the energy storage auxiliary station is put into use, when the AGC operation of the new energy station is in the free power generation mode, the power coordination control system automatically enters the power prediction control mode of the energy storage auxiliary station; The power cooperative control system and the power prediction system communicate in real time using SFTP. The power cooperative control system receives the information transmitted by the power prediction system and reads the power prediction value P forecast As the power control total target instruction P Σ The energy storage system realizes accurate power prediction and tracking and bidirectional energy output according to the actual power input of renewable energy power generation. ES =P forecast -P Collecting line At the same time, the power coordination control system converts the active power P of the new energy generation collection line Collecting line It is superimposed with the active power P0' of the energy storage grid-connected point and sent to the dispatching master station as the power forecast assessment calculation value for the entire station.

9. The method for coordinated control of energy storage power in renewable energy power generation configuration according to claim 1, characterized in that: Step 5: The power cooperative control system sends the control instruction P to the energy storage energy management system. ES It should be subject to the regulation capacity of the energy storage system and the capacity of the primary equipment in the station, including: The power cooperative control system obtains the energy storage system capacity and primary equipment capacity status information from the energy storage energy management system; According to the capacity of the energy storage system and the capacity status information of the primary equipment, the maximum allowable charging power value P of the energy storage system is calculated. max-c and the maximum allowable discharge power of the energy storage system P max-f ; The control instructions of the energy storage energy management system should meet P max-c ≤P ES ≤P max-f , to avoid the energy storage system's adjustment speed being unable to track the rapid changes in active power instructions, and to avoid safety problems in the energy storage system and new energy stations.

10. A new energy power generation configuration energy storage power collaborative control system, characterized in that: It includes a power collaborative control system; the power collaborative control system is deployed on the upper layer of the energy management system of the new energy power generation unit and the energy storage energy management system, and the power collaborative control system interacts with the station RTU, the energy management system of the new energy power generation unit and the energy storage energy management system respectively, and is connected to the power prediction system of the new energy station; it also includes a processor and a storage medium; 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 to 9.

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