A thermal power unit dynamic regulation method, system, device and readable storage medium

Abstract

The present application belongs to the technical field of power system, and discloses a thermal power unit dynamic regulation method, comprising: analyzing the rapid power change of a single new energy station and calculating the new energy power change rate; calculating the new energy overall power change rate according to the power change rate of the single new energy station; comparing the new energy overall power change rate with the pre-calculated actual operation thermal power unit overall regulation rate to determine whether the adjustment of the thermal power unit regulation rate is needed; and adjusting the thermal power unit regulation rate in the case of yes. The present application can remotely control and dynamically adjust the regulation rate or number of operating units based on the rapid change of new energy power, ensure the safe and stable operation of the power grid, and improve the new energy consumption space.

Description

Technical Field

[0001] This invention relates to the field of power system technology, and in particular to a dynamic control method, system, equipment, and readable storage medium for thermal power units. Background Technology

[0002] In recent years, my country's new energy development has been rapid, but it is characterized by intermittency, volatility, and uncertainty, posing a severe frequency regulation burden on the power system. During power system operation, the grid frequency must be controlled within an allowable range of around 50Hz. In other words, the prerequisite for stable power system operation is real-time balance between power generation and consumption; otherwise, it will lead to a decline in power quality, and in extreme cases, even system instability. Automatic generation control (AGC) is an automatic integrated control system designed to achieve real-time balance between power generation and load in the power system, ensuring that the grid frequency and tie-line exchange power are maintained within specified values. Currently, in the power system, due to policy requirements to maximize the generation of new energy sources while ensuring grid safety, higher demands are placed on thermal power units, which play a crucial role in frequency regulation. This also requires grid dispatch and control departments to rationally allocate the output of various types of power sources to ensure the stable operation of the grid.

[0003] Currently, power grid dispatch and control departments use the AGC system to set planned output values ​​for thermal power units based on load forecasts, generation plans, exchange plans, and unit combinations, such as... Figure 1As shown, the power output benchmark of thermal power units in the power grid is determined by the dispatch control center during the dispatch planning process using ultra-short-term load and wind power forecast information. The benchmark and participation factors of each unit are the result of the optimized allocation of planned output, and rolling optimization is performed every 15 minutes, remaining unchanged within that time period. Simultaneously, the grid area control deviation (ACE) value is allocated to units operating in AGC mode according to a certain strategy. AGC units eliminate this power deviation, thereby ensuring grid frequency stability. Since AGC is included in ancillary service trading in the electricity market, the order of unit operation is determined by a bidding mechanism. Therefore, the number of units operating in AGC mode within a certain time period is limited. For example, in the Shandong power grid, the number of units operating in AGC mode is around 20 per day. The management of ACE in the domestic power grid follows the North American Electric Reliability Committee (NERC) A1 / A2 standards and CPS standards. Taking the North China Power Grid as an example, it adopts the A1 / A2 standard. A1 requires that the ACE (Active Energy Crossing) of the control area must cross zero at least once within 15 minutes; A2 requires that the average ACE integral value of the control area within 15 minutes must be controlled within a specified range. NERC requires that the compliance rate of each control area meeting the A1 / A2 standard be above 90%. Through implementation, the ACE of each control area is kept close to zero, ensuring the balance between power load and generation load, and between planned and actual power exchange. Power grids in North China, Northwest China, and Northeast China have all formulated corresponding standards and real-time rules according to the national "two detailed rules." For example, the "Implementation Rules for Grid-Connected Operation Management of Power Plants in North China" stipulates that the active power regulation rate is: 1.5% of the rated active power for general direct-fired pulverizing boiler units; and 2% of the rated active power for general pulverizing units with intermediate storage silos. Figure 2 The active power regulation rate A1 is typically set at 1%-2% MW / min (based on the unit's rated power), allowing the unit to increase or decrease its active power at the same rate. Domestic thermal power units are mainly 300MW and 600MW units, with most having a regulation rate of 4.5-10MW / min. However, in actual operation, within a certain load range, most units, especially those with intermediate storage pulverizing systems, have considerable room for adjustment in their active power regulation rate.

[0004] As the proportion of renewable energy output increases year by year, conventional thermal power units are being largely replaced. The rotational inertia of the power grid, which has a higher proportion of renewable energy, continues to decrease, and its frequency regulation capability declines. If the actual power generation of renewable energy increases or decreases too rapidly in one direction, the ACE (Enhanced Energy Conversion Rate) will exceed the limit due to the decline in the grid's regulation capability. This will fail to meet the requirements for the safe and stable operation of the power grid, and it will be necessary to adjust the output of renewable energy to ensure the stability of the grid frequency. Consequently, wind and solar power curtailment will occur. Summary of the Invention

[0005] This invention provides a method, system, device, and readable storage medium for dynamic control of thermal power units. It can remotely control and dynamically adjust the adjustment rate or number of operating units based on rapid changes in renewable energy power, thereby ensuring the stable operation of the power grid while increasing the capacity for renewable energy consumption.

[0006] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or to describe the scope of protection of these embodiments. Its sole purpose is to present some concepts in a simple form as a prelude to the detailed description that follows.

[0007] According to a first aspect of the present invention, a dynamic control method for thermal power units is provided.

[0008] This dynamic control method for thermal power units includes:

[0009] Analyze the rapid power changes of a single renewable energy power station and calculate the rate of change of renewable energy power.

[0010] Calculate the overall power change rate of new energy based on the power change rate of a single new energy power station;

[0011] The overall power change rate of the new energy source is compared with the pre-calculated overall adjustment rate of the actual operating thermal power unit to determine whether the adjustment rate of the thermal power unit needs to be adjusted.

[0012] If the judgment result is yes, the regulating rate of the thermal power unit shall be adjusted.

[0013] In one embodiment, analyzing the rapid power change of a single renewable energy power station and calculating the renewable energy power change rate includes: analyzing the rapid power change of a single renewable energy power station and calculating the renewable energy power change rate according to the following calculation formula:

[0014]

[0015] In the formula, For a unit of time period; For the i-th new energy power station in a unit time period The rate of change of active power within; This represents the rate of change of active power as planned for the day. This refers to the maximum limit for active power variation specified in the standard. At a certain time on that day; For the i-th new energy power station Active power at any given moment; The i-th new energy power station Active power at any given moment.

[0016] In one embodiment, calculating the overall power change rate of renewable energy based on the power change rate of a single renewable energy power station includes: calculating the overall power change rate of renewable energy based on the power change rate of a single renewable energy power station using the following formula:

[0017]

[0018] In the formula, The overall power change rate of new energy sources; For the i-th new energy power station in a unit time period The rate of change of active power within the grid; n is the number of grid-connected renewable energy power plants in the current power grid.

[0019] In one embodiment, comparing the overall power change rate of the new energy source with the pre-calculated overall adjustment rate of the actual operating thermal power unit to determine whether the adjustment rate of the thermal power unit needs to be adjusted includes: comparing the overall power change rate of the new energy source with the pre-calculated overall adjustment rate of the actual operating thermal power unit; if the comparison result shows that the overall power change rate of the new energy source is greater than or equal to the overall adjustment rate of the actual operating thermal power unit, then it is determined that the adjustment rate of the thermal power unit needs to be adjusted; if the comparison result shows that the overall power change rate of the new energy source is less than the overall adjustment rate of the actual operating thermal power unit, then it is determined that the adjustment rate of the thermal power unit does not need to be adjusted.

[0020] In one embodiment, if the determination result is yes, adjusting the regulation rate of the thermal power unit includes: adjusting the regulation rate of the random R mode thermal power unit when the difference between the overall power change rate of the new energy source and the overall regulation rate of the actual operating thermal power unit is less than or equal to a threshold; and adjusting the number of newly put into random R mode thermal power units and their regulation rates when the difference between the overall power change rate of the new energy source and the overall regulation rate of the actual operating thermal power unit is greater than a threshold.

[0021] In one embodiment, the overall adjustment rate of the actual operating thermal power unit is calculated using the following formula:

[0022]

[0023]

[0024] In the formula, This refers to the overall adjustment rate of the actual operating thermal power units; The adjustment rate of thermal power units put into random R mode; The real-time adjustment rate is the rate of adjustment of the i-th thermal power unit in random R mode, where n is the total number of thermal power units in random R mode in the current power grid, and i is the i-th thermal power unit in random R mode.

[0025] In one embodiment, the threshold is calculated using the following formula:

[0026]

[0027] In the formula, For the threshold, The maximum allowable adjustment rate for the i-th thermal power unit in random R mode, under the premise of meeting AGC indicators and ensuring operational safety. The real-time adjustment rate is the rate of adjustment of the i-th thermal power unit in random R mode, where n is the total number of thermal power units in random R mode in the current power grid, and i is the i-th thermal power unit in random R mode.

[0028] In one embodiment, when the difference between the overall power change rate of the new energy source and the overall adjustment rate of the actual operating thermal power unit is less than a threshold, adjusting the adjustment rate of the random R-mode thermal power unit includes:

[0029] For the existing n thermal power units in the grid operating under random R mode, according to the maximum allowable adjustment rate of the units... Adjust the rate in real time with the unit The difference Sort by largest to smallest to And calculate in real time ;

[0030] The real-time regulating rate of the first to i thermal power units in random R mode is remotely adjusted to the maximum allowable regulating rate. to The real-time adjustment rate of the (i+1)th random R-mode thermal power unit Remote adjustment to The adjustment rates of the remaining thermal power units remain unchanged.

[0031] In one embodiment, when the difference between the overall power change rate of the new energy source and the overall adjustment rate of the actual operating thermal power units is greater than a threshold, adjusting the number of newly put into random R mode thermal power units and the adjustment rate includes:

[0032] The real-time regulation rates of the existing n thermal power units in the grid under random R mode will be remotely adjusted to the maximum allowable regulation rate. to and calculate ;

[0033] The thermal power units currently waiting to be put into random R mode are units n+1 to n+m, corresponding to their maximum allowable adjustment rate. to Through superposition calculation, the result is calculated in real time. Get the value of j;

[0034] Put units n+1 to n+j into random R mode and remotely adjust the regulation rate to the maximum.

[0035] in, The maximum allowable adjustment rate for the (n+j-1)th thermal power unit is... This represents the maximum allowable adjustment rate for the (n+j)th thermal power unit.

[0036] According to a second aspect of the present invention, a dynamic control system for thermal power units is provided.

[0037] This dynamic control system for thermal power units includes:

[0038] A single rate calculation module is used to analyze the rapid power changes of a single renewable energy power station and calculate the rate of change of renewable energy power.

[0039] The overall rate calculation module is used to calculate the overall power change rate of new energy based on the power change rate of a single new energy power station.

[0040] The rate comparison module is used to compare the overall power change rate of the new energy source with the pre-calculated overall adjustment rate of the actual operating thermal power unit to determine whether the adjustment rate of the thermal power unit needs to be adjusted.

[0041] The rate adjustment module is used to adjust the regulating rate of the thermal power unit when the judgment result is yes.

[0042] In one embodiment, when analyzing the rapid power change of a single renewable energy power station and calculating the renewable energy power change rate, the single rate calculation module uses the following formula to analyze the rapid power change of a single renewable energy power station and calculate the renewable energy power change rate:

[0043]

[0044] In the formula, For a unit of time period; For the i-th new energy power station in a unit time period The rate of change of active power within; This represents the rate of change of active power as planned for the day. This refers to the maximum limit for active power variation specified in the standard. At a certain time on that day; For the i-th new energy power station Active power at any given moment; The i-th new energy power station Active power at any given moment.

[0045] In one embodiment, when the overall rate calculation module calculates the overall power change rate of renewable energy based on the power change rate of a single renewable energy power station, it calculates the overall power change rate of renewable energy using the following formula:

[0046]

[0047] In the formula, The overall power change rate of new energy sources; For the i-th new energy power station in a unit time period The rate of change of active power within the grid; n is the number of grid-connected renewable energy power plants in the current power grid.

[0048] In one embodiment, when the rate comparison module compares the overall power change rate of the new energy source with the pre-calculated overall adjustment rate of the actual operating thermal power unit to determine whether the adjustment rate of the thermal power unit needs to be adjusted, the module compares the overall power change rate of the new energy source with the pre-calculated overall adjustment rate of the actual operating thermal power unit. If the comparison result shows that the overall power change rate of the new energy source is greater than or equal to the overall adjustment rate of the actual operating thermal power unit, then it is determined that the adjustment rate of the thermal power unit needs to be adjusted; if the comparison result shows that the overall power change rate of the new energy source is less than the overall adjustment rate of the actual operating thermal power unit, then it is determined that the adjustment rate of the thermal power unit does not need to be adjusted.

[0049] In one embodiment, when the rate adjustment module adjusts the regulation rate of the thermal power unit if the determination result is yes, it adjusts the regulation rate of the thermal power unit in random R mode if the difference between the overall power change rate of the new energy source and the overall regulation rate of the actual operating thermal power unit is less than or equal to a threshold; and it adjusts the number of newly put thermal power units in random R mode and their regulation rate if the difference between the overall power change rate of the new energy source and the overall regulation rate of the actual operating thermal power unit is greater than a threshold.

[0050] In one embodiment, the overall adjustment rate of the actual operating thermal power unit is calculated using the following formula:

[0051]

[0052]

[0053] In the formula, This refers to the overall adjustment rate of the actual operating thermal power units; The adjustment rate of thermal power units put into random R mode; The real-time adjustment rate is the rate of adjustment of the i-th thermal power unit in random R mode, where n is the total number of thermal power units in random R mode in the current power grid, and i is the i-th thermal power unit in random R mode.

[0054] In one embodiment, the threshold is calculated using the following formula:

[0055]

[0056] In the formula, For the threshold, The maximum allowable adjustment rate for the i-th thermal power unit in random R mode, under the premise of meeting AGC indicators and ensuring operational safety. The real-time adjustment rate is the rate of adjustment of the i-th thermal power unit in random R mode, where n is the total number of thermal power units in random R mode in the current power grid, and i is the i-th thermal power unit in random R mode.

[0057] In one embodiment, when the rate adjustment module adjusts the regulation rate of the random R-mode thermal power units when the difference between the overall power change rate of the new energy source and the overall regulation rate of the actual operating thermal power units is less than or equal to a threshold, the rate adjustment module adjusts the regulation rate of the existing n random R-mode thermal power units in the power grid according to the maximum allowable regulation rate of the units. Adjust the rate in real time with the unit The difference Sort by largest to smallest to And calculate in real time The real-time regulating rate of the first to i thermal power units in random R mode will be remotely adjusted to the maximum allowable regulating rate. to The real-time adjustment rate of the (i+1)th random R-mode thermal power unit Remote adjustment to The adjustment rates of the remaining units remain unchanged.

[0058] When the difference between the overall power change rate of the new energy source and the overall regulation rate of the actual operating thermal power units exceeds a threshold, the rate adjustment module, when adjusting the number of newly put into random R mode thermal power units and their regulation rates, remotely adjusts the real-time regulation rate of the existing n random R mode thermal power units in the power grid to the maximum allowable regulation rate. to and calculate The current order of thermal power units waiting to be put into random R mode is from n+1 to n+m, corresponding to their maximum allowable adjustment rate. to Through superposition calculation, the result is calculated in real time. Obtain the value of j; put units n+1 to n+j into random R mode, and remotely adjust the adjustment rate to the maximum, where, The maximum allowable adjustment rate for the (n+j-1)th thermal power unit is... This represents the maximum allowable adjustment rate for the (n+j)th thermal power unit.

[0059] According to a third aspect of the present invention, a computer device is provided.

[0060] In some embodiments, the computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program to implement the steps of the method described above.

[0061] According to a fourth aspect of the present invention, a computer-readable storage medium is provided.

[0062] In one embodiment, a computer program is stored on the computer-readable storage medium, which, when executed by a processor, implements the steps of the above method.

[0063] The technical solutions provided by the embodiments of the present invention may include the following beneficial effects:

[0064] This invention, by monitoring the rate of change of active power from new energy sources in real time, helps the power grid to grasp the regulation rate and regulation capacity of generating units within the region. It provides a quantitative method for the power grid to rationally adjust the operating mode and number of generating units. The power grid can dynamically adjust the regulation rate and number of generating units in R mode in real time. It can solve the problems of reduced grid regulation capacity and ACE exceeding limits caused by fluctuations in new energy sources, meet the requirements for safe and stable operation of the power grid, ensure grid frequency stability, and fully absorb new energy sources such as wind power.

[0065] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0066] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0067] Figure 1 This is a schematic diagram illustrating network-source AGC collaborative dispatch control according to an exemplary embodiment;

[0068] Figure 2 This is a schematic diagram illustrating AGC control of a conventional thermal power unit according to an exemplary embodiment;

[0069] Figure 3This is a flowchart illustrating a dynamic control method for thermal power units according to an exemplary embodiment;

[0070] Figure 4 This is a structural block diagram of a dynamic control system for a thermal power unit, according to an exemplary embodiment.

[0071] Figure 5 This is a schematic diagram of the system structure of a dynamic control system for thermal power units in actual application, according to an exemplary embodiment.

[0072] Figure 6 This is a schematic diagram of the structure of a computer device according to an exemplary embodiment. Detailed Implementation

[0073] The following description and accompanying drawings fully illustrate specific embodiments described herein to enable those skilled in the art to practice them. Some embodiments may include or substitute parts and features of other embodiments. The scope of the embodiments herein encompasses the entire scope of the claims and all available equivalents thereof. Throughout this document, the terms “first,” “second,” etc., are used only to distinguish one element from another without requiring or implying any actual relationship or order between the elements. Indeed, a first element can also be referred to as a second element, and vice versa. Furthermore, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a structure, apparatus, or device. Without further limitation, an element defined by the phrase “comprising one…” does not exclude the presence of other identical elements in the structure, apparatus, or device that includes said element. The various embodiments described herein are presented in a progressive manner, with each embodiment focusing on its differences from other embodiments; similar or identical parts between embodiments can be referred to interchangeably.

[0074] The terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" used in this document to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings. They are used solely for the convenience of describing the document and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In the description herein, unless otherwise specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two elements; they can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0075] In this document, unless otherwise stated, the term "multiple" means two or more.

[0076] In this article, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0077] In this article, the term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0078] It should be understood that although the steps in the flowchart are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order constraint on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the diagram may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0079] The modules in the apparatus or system of this application can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device in hardware form, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0080] Where there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0081] Figure 3An embodiment of a dynamic control method for thermal power units according to the present invention is shown.

[0082] In this optional embodiment, the dynamic control method for thermal power units includes:

[0083] Step S301: Analyze the rapid power change of a single renewable energy power station and calculate the rate of change of renewable energy power.

[0084] Step S303: Calculate the overall power change rate of new energy based on the power change rate of a single new energy power station;

[0085] Step S305: Compare the overall power change rate of the new energy source with the pre-calculated overall adjustment rate of the actual operating thermal power unit to determine whether the adjustment rate of the thermal power unit needs to be adjusted.

[0086] Step S307: If the judgment result is yes, adjust the regulating rate of the thermal power unit.

[0087] In one embodiment, analyzing the rapid power change of a single renewable energy power station and calculating the renewable energy power change rate includes: analyzing the rapid power change of a single renewable energy power station and calculating the renewable energy power change rate according to the following calculation formula:

[0088]

[0089] In the formula, It is a unit of time period (usually 1 minute or 10 minutes); For the i-th new energy power station in a unit time period The rate of change of active power within; This represents the rate of change of active power as planned for the day. This refers to the maximum limit for active power variation specified in the standard. At a certain time on that day; For the i-th new energy power station Active power at any given moment; The i-th new energy power station Active power at any given moment.

[0090] In practical applications, the maximum limit for the variation of active power of wind power shall be implemented in accordance with the "Technical Regulations for Wind Farm Connection to Power System" (GB / T19963-2011), as follows:

[0091] Wind farm installed capacity (MW) Maximum limit of active power variation over 10 minutes (MW) Maximum change in active power (MW) in 1 minute ＜30 10 3 30～150 Installed capacity / 3 Installed capacity / 10 ＞150 50 15

[0092] The maximum limit for changes in photovoltaic active power is governed by the "Technical Regulations for Wind Farm Access to Power Systems" (GB / T19964-2012), which states that "the rate of change in active power shall not exceed 10% of the installed capacity per minute."

[0093] In one embodiment, the overall power change rate of the new energy source The active power change rate for all grid-connected renewable energy power plants The sum of .

[0094] In one embodiment, the overall adjustment rate of the actual operating thermal power unit is the adjustment rate of the thermal power unit operating in Plan O mode. Adjustment rate of thermal power units in random R mode The sum. According to the load plan curve of the units operating in mode O issued by the power grid dispatching department, the load command of the units remains basically unchanged within 1 minute, therefore the adjustment rate It can be ignored.

[0095] In this invention, the overall regulation rate of the thermal power units in actual operation only considers the sum of the regulation rates of the thermal power units put into random R mode, that is... ;in, The sum of the regulation rates of all operating R-mode thermal power units; The real-time adjustment rate for thermal power units in random R mode; and whether or not the adjustment rate of the thermal power unit needs to be adjusted is based on... Is it greater than If the value is greater than 1, then the rate of the thermal power unit needs to be adjusted; if it is less than 1, then it is not necessary.

[0096] In one embodiment, for the dynamic adjustment of thermal power units, when the judgment result is yes, the adjustment of the regulating rate of the thermal power unit can be divided into the following two cases:

[0097] When the difference between the overall power change rate of the new energy source and the overall adjustment rate of the actual operating thermal power unit is less than a threshold, the adjustment rate of the random R mode thermal power unit is adjusted.

[0098] If the difference between the overall power change rate of the new energy source and the overall adjustment rate of the actual operating thermal power units is greater than a threshold, the number of newly put thermal power units into random R mode and the adjustment rate shall be adjusted.

[0099] The threshold value is determined as follows: Dynamic testing is conducted on all thermal power units operating in random R mode, and the maximum allowable adjustment rate of the thermal power units under the premise of meeting AGC indicators and ensuring operational safety is recorded. Calculate all units put into random R mode Adjust the rate in real time with the unit The sum of the differences is the threshold. .

[0100] Correspondingly, if Then the system remotely adjusts the regulation rate of the existing random R-mode units; if The system will then remotely adjust the number of units in the random R mode.

[0101] In one embodiment, the system can remotely adjust the regulation rate of an existing random R-mode unit in the following manner:

[0102] For the existing n thermal power units in the grid operating under random R mode, according to the maximum allowable adjustment rate of the units... Adjust the rate in real time with the unit The difference Sort by largest to smallest to And calculate in real time ;

[0103] The real-time regulating rate of the first to i thermal power units in random R mode is remotely adjusted to the maximum allowable regulating rate. to The real-time adjustment rate of the (i+1)th random R-mode thermal power unit Remote adjustment to The adjustment rates of the remaining thermal power units remain unchanged.

[0104] In one embodiment, the number of units in random R mode can be remotely adjusted in the following way:

[0105] The real-time regulation rates of the existing n thermal power units in the grid under random R mode will be remotely adjusted to the maximum allowable regulation rate. to and calculate ;

[0106] The thermal power units currently waiting to be put into random R mode are units n+1 to n+m, corresponding to their maximum allowable adjustment rate. to Through superposition calculation, the result is calculated in real time. Get the value of j;

[0107] Units n+1 to n+j are put into random R mode, and the regulation rate is remotely adjusted to the maximum. The maximum allowable adjustment rate for the (n+j-1)th thermal power unit is... This represents the maximum allowable adjustment rate for the (n+j)th thermal power unit.

[0108] Figure 4 An embodiment of a dynamic control system for thermal power units according to the present invention is shown.

[0109] In this optional embodiment, the dynamic control system for thermal power units includes:

[0110] The single rate calculation module 401 is used to analyze the rapid power change of a single renewable energy power station and calculate the rate of change of renewable energy power.

[0111] The overall rate calculation module 403 is used to calculate the overall power change rate of new energy based on the power change rate of a single new energy power station.

[0112] The rate comparison module 405 is used to compare the overall power change rate of the new energy with the pre-calculated overall adjustment rate of the actual operating thermal power unit to determine whether the adjustment rate of the thermal power unit needs to be adjusted.

[0113] The rate adjustment module 407 is used to adjust the regulating rate of the thermal power unit when the judgment result is yes.

[0114] In one embodiment, when the rate comparison module 405 compares the overall power change rate of the new energy source with the pre-calculated overall adjustment rate of the actual operating thermal power unit to determine whether the adjustment rate of the thermal power unit needs to be adjusted, the rate comparison module 405 compares the overall power change rate of the new energy source with the pre-calculated overall adjustment rate of the actual operating thermal power unit. If the comparison result shows that the overall power change rate of the new energy source is greater than or equal to the overall adjustment rate of the actual operating thermal power unit, then it is determined that the adjustment rate of the thermal power unit needs to be adjusted; if the comparison result shows that the overall power change rate of the new energy source is less than the overall adjustment rate of the actual operating thermal power unit, then it is determined that the adjustment rate of the thermal power unit does not need to be adjusted.

[0115] In one embodiment, when the rate adjustment module 407 adjusts the regulation rate of the thermal power unit if the determination result is yes, it adjusts the regulation rate of the thermal power unit in random R mode if the difference between the overall power change rate of the new energy source and the overall regulation rate of the actual operating thermal power unit is less than a threshold; and adjusts the number of newly put thermal power units in random R mode and their regulation rate if the difference between the overall power change rate of the new energy source and the overall regulation rate of the actual operating thermal power unit is greater than a threshold.

[0116] Specifically, when the difference between the overall power change rate of the new energy source and the overall adjustment rate of the actual operating thermal power units is less than a threshold, the rate adjustment module 407 adjusts the adjustment rate of the R-mode thermal power units, according to the maximum allowable adjustment rate of the existing n random R-mode thermal power units in the power grid. Adjust the rate in real time with the unit The difference Sort by largest to smallest to And calculate in real time The real-time regulating rate of the first to i thermal power units in random R mode will be remotely adjusted to the maximum allowable regulating rate. to The real-time adjustment rate of the (i+1)th random R-mode thermal power unit Remote adjustment to The adjustment rates of the remaining units remain unchanged.

[0117] When the difference between the overall power change rate of the new energy source and the overall regulation rate of the actual operating thermal power units exceeds a threshold, the rate adjustment module 407, when adjusting the number of newly commissioned thermal power units in random R mode and their regulation rates, remotely adjusts the real-time regulation rate of the existing n thermal power units in random R mode within the power grid to the maximum allowable regulation rate. to and calculate The current order of thermal power units waiting to be put into random R mode is from n+1 to n+m, corresponding to their maximum allowable adjustment rate. to Through superposition calculation, the result is calculated in real time. Obtain the value of j; put units n+1 to n+j into random R mode, and remotely adjust the adjustment rate to the maximum, where, The maximum allowable adjustment rate for the (n+j-1)th thermal power unit is... This represents the maximum allowable adjustment rate for the (n+j)th thermal power unit.

[0118] In practical applications, the aforementioned dynamic control system for thermal power units can be used as follows: Figure 5 As shown, the corresponding system layout is performed as follows:

[0119] In practical applications, the dynamic control system for thermal power units can consist of a new energy regulation rate calculation system, a thermal power unit regulation rate calculation system, and a grid-side calculation, regulation, and dispatch control system. Specifically, for the new energy regulation rate calculation system, the signal acquisition module PLC... 新1 The collected active power change rate K 新1 The data are respectively sent to the first input terminal of the first comparison module CMP1 and the first input terminal of the first selector module, representing the planned rate of change of active power K. R1The data is sent to the second input of the first comparison module CMP1. The rapidly changing active power is sent to the second input of the second comparison module CMP2, and the maximum allowable active power change is sent to the first input of the second comparison module CMP2. The outputs of the first and second comparison modules are ANDed together and then sent to the set input of the first selector module to obtain the effective rapid active power change rate. The first adder module is used to sum the effective active power change rates of all grid-connected renewable energy power plants to obtain the overall renewable energy power change rate K. A新 .

[0120] For the thermal power unit regulation rate calculation system, the signal acquisition module PLC 火 The real-time adjustment rate of each R-mode thermal power unit is collected and sent to the input of the second adder module to calculate the overall power change rate K of the entire network's R-mode thermal power units. A火-R The maximum allowable regulation rate V of the current unit will be collected. max The current adjustment rate is sent to the first and second input terminals of the second subtraction module, respectively, and the output is the margin V of the current adjustment rate of the unit. Ri The margin V of the adjustment rate of each unit Ri The data are fed into the input of the third adder, and the output is the overall network regulation rate margin ΔV. R .

[0121] For the power grid-side operational regulation and dispatch control system, the first and second input terminals of the first subtraction module are K. A新 and K A火-R The first and second inputs of the third comparison module are the output of the first subtraction module and ΔV. R The outputs are sent to the rate regulation calculation system and the R-mode unit number calculation system, respectively. The rate regulation calculation system obtains the number of units i that need to be regulated, and then the grid remote dispatch control system remotely adjusts the rates of units 1 to i+1. The R-mode unit number calculation system obtains the number of units j that need to be newly put into R-mode, and the grid remote dispatch control system puts j new R-mode units into operation and adjusts their regulation rates to the maximum allowable value.

[0122] By utilizing the aforementioned technical solutions, this invention, through real-time monitoring of the rate of change of active power from new energy sources, helps the power grid grasp the regulation rate and capacity of generating units within a region. It provides a quantitative method for the power grid to rationally adjust the operating mode and number of generating units. The power grid can dynamically adjust the regulation rate and number of generating units in the random R mode in real time. This avoids the situation where the overall power regulation capacity of the power grid is insufficient within a certain time period due to the increase in wind power generation and the decrease in thermal power generation. It ensures that the average value of the regional control deviation of the power grid is controlled within a specified range over a certain period, solves the problem of decreased grid regulation capacity and ACE exceeding limits caused by fluctuations in new energy sources, meets the requirements for safe and stable operation of the power grid, ensures grid frequency stability, and fully absorbs new energy sources such as wind power.

[0123] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 6 As shown, the computer device includes a processor, memory, and a network interface connected via a system bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The database stores static and dynamic information data. The network interface communicates with external terminals via a network connection. When the computer program is executed by the processor, it implements the steps in the above method embodiments.

[0124] Those skilled in the art will understand that Figure 6 The structure shown is merely a block diagram of a portion of the structure related to the present invention and does not constitute a limitation on the computer device to which the present invention is applied. A specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0125] In one embodiment, a computer device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above method embodiments.

[0126] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the above method embodiments.

[0127] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. Any references to memory, storage, databases, or other media used in the embodiments provided by this invention can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical storage, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0128] This invention is not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

Claims

1. A dynamic control method for thermal power units, characterized in that, include: Analyze the rapid power changes of a single renewable energy power station and calculate the rate of change of renewable energy power. Calculate the overall power change rate of new energy based on the power change rate of a single new energy power station; The overall power change rate of the new energy source is compared with the pre-calculated overall adjustment rate of the actual operating thermal power unit to determine whether the adjustment rate of the thermal power unit needs to be adjusted. If the judgment result is yes, adjust the regulating rate of the thermal power unit; The process of comparing the overall power change rate of the new energy source with the pre-calculated overall adjustment rate of the actual operating thermal power units to determine whether the adjustment rate of the thermal power units needs to be adjusted includes: comparing the overall power change rate of the new energy source with the pre-calculated overall adjustment rate of the actual operating thermal power units; if the comparison result shows that the overall power change rate of the new energy source is greater than or equal to the overall adjustment rate of the actual operating thermal power units, then it is determined that the adjustment rate of the thermal power units needs to be adjusted; if the comparison result shows that the overall power change rate of the new energy source is less than the overall adjustment rate of the actual operating thermal power units, then it is determined that the adjustment rate of the thermal power units does not need to be adjusted. When the difference between the overall power change rate of the new energy source and the overall adjustment rate of the actual operating thermal power units is less than or equal to a threshold, adjusting the adjustment rate of the random R-mode thermal power units includes: adjusting the adjustment rate of the existing n random R-mode thermal power units in the current power grid according to the maximum allowable adjustment rate of the unit. Adjust the rate in real time with the unit The difference Sort by largest to smallest to And calculate in real time The real-time regulating rate of the first to i thermal power units in random R mode will be remotely adjusted to the maximum allowable regulating rate. to The real-time adjustment rate of the (i+1)th random R-mode thermal power unit Remote adjustment to The adjustment rate of the remaining thermal power units remains unchanged; When the difference between the overall power change rate of the new energy sources and the overall regulation rate of the actual operating thermal power units exceeds a threshold, adjusting the number of newly put into random R mode thermal power units and their regulation rates includes: remotely adjusting the real-time regulation rates of the existing n random R mode thermal power units in the power grid to the maximum allowable regulation rate. to and calculate The current order of thermal power units waiting to be put into random R mode is from n+1 to n+m, corresponding to their maximum allowable adjustment rate. to Through superposition calculation, the result is calculated in real time. Obtain the value of j; put the (n+1)th to (n+j)th generator units into random R mode and remotely adjust the adjustment rate to the maximum. Where n+j represents the (n+j)th thermal power unit among units n+1 to n+m that is waiting to be put into random R mode, and the value of j should satisfy... , The maximum allowable adjustment rate for the (n+j-1)th thermal power unit is... This represents the maximum allowable adjustment rate for the (n+j)th thermal power unit. The overall power change rate of new energy sources; This refers to the overall adjustment rate of the actual operating thermal power units.

2. The dynamic control method for thermal power units according to claim 1, characterized in that, The analysis of rapid power changes at individual renewable energy power plants and the calculation of renewable energy power change rates include: Based on the following calculation formula, analyze the rapid power change of a single renewable energy power station and calculate the rate of change of renewable energy power: In the formula, For a unit of time period; For the i-th new energy power station in a unit time period The rate of change of active power within; This represents the rate of change of active power as planned for the day. This refers to the maximum limit for active power variation specified in the standard. At a certain time on that day; For the i-th new energy power station Active power at any given moment; The i-th new energy power station Active power at any given moment.

3. The dynamic control method for thermal power units according to claim 2, characterized in that, The calculation of the overall power change rate of renewable energy, based on the power change rate of a single renewable energy power plant, includes: Based on the power change rate of a single renewable energy power plant, the overall power change rate of renewable energy is calculated using the following formula: In the formula, The overall power change rate of new energy sources; For the i-th new energy power station in a unit time period The rate of change of active power within the grid; n is the number of grid-connected renewable energy power plants in the current power grid.

4. The dynamic control method for thermal power units according to claim 1, characterized in that, If the judgment result is yes, the adjustment of the regulating rate of the thermal power unit includes: When the difference between the overall power change rate of the new energy source and the overall adjustment rate of the actual operating thermal power unit is less than or equal to the threshold, the adjustment rate of the random R mode thermal power unit is adjusted. If the difference between the overall power change rate of the new energy source and the overall adjustment rate of the actual operating thermal power unit is greater than a threshold, the number of newly put into random R mode thermal power units and the adjustment rate shall be adjusted.

5. The dynamic control method for thermal power units according to claim 4, characterized in that, The overall regulation rate of the actual operating thermal power unit is calculated using the following formula: In the formula, This refers to the overall adjustment rate of the actual operating thermal power units; The adjustment rate of thermal power units put into random R mode; The real-time adjustment rate is the rate of adjustment of the i-th thermal power unit in random R mode, where n is the total number of thermal power units in random R mode in the current power grid, and i is the i-th thermal power unit in random R mode.

6. The dynamic control method for thermal power units according to claim 5, characterized in that, The threshold is calculated using the following formula: In the formula, For the threshold, The maximum allowable adjustment rate for the i-th thermal power unit in random R mode, under the premise of meeting AGC indicators and ensuring operational safety. The real-time adjustment rate is the rate of adjustment of the i-th thermal power unit in random R mode, where n is the total number of thermal power units in random R mode in the current power grid, and i is the i-th thermal power unit in random R mode.

7. A dynamic control system for thermal power units, characterized in that, include: A single rate calculation module is used to analyze the rapid power changes of a single renewable energy power station and calculate the rate of change of renewable energy power. The overall rate calculation module is used to calculate the overall power change rate of new energy based on the power change rate of a single new energy power station. The rate comparison module is used to compare the overall power change rate of the new energy source with the pre-calculated overall adjustment rate of the actual operating thermal power unit to determine whether the adjustment rate of the thermal power unit needs to be adjusted. The rate adjustment module is used to adjust the regulating rate of the thermal power unit when the judgment result is yes; The process of comparing the overall power change rate of the new energy source with the pre-calculated overall adjustment rate of the actual operating thermal power units to determine whether the adjustment rate of the thermal power units needs to be adjusted includes: comparing the overall power change rate of the new energy source with the pre-calculated overall adjustment rate of the actual operating thermal power units; if the comparison result shows that the overall power change rate of the new energy source is greater than or equal to the overall adjustment rate of the actual operating thermal power units, then it is determined that the adjustment rate of the thermal power units needs to be adjusted; if the comparison result shows that the overall power change rate of the new energy source is less than the overall adjustment rate of the actual operating thermal power units, then it is determined that the adjustment rate of the thermal power units does not need to be adjusted. When the difference between the overall power change rate of the new energy source and the overall adjustment rate of the actual operating thermal power units is less than or equal to a threshold, adjusting the adjustment rate of the random R-mode thermal power units includes: adjusting the adjustment rate of the existing n random R-mode thermal power units in the current power grid according to the maximum allowable adjustment rate of the unit. Adjust the rate in real time with the unit The difference Sort by largest to smallest to And calculate in real time The real-time regulating rate of the first to i thermal power units in random R mode will be remotely adjusted to the maximum allowable regulating rate. to The real-time adjustment rate of the (i+1)th random R-mode thermal power unit Remote adjustment to The adjustment rate of the remaining thermal power units remains unchanged; When the difference between the overall power change rate of the new energy sources and the overall regulation rate of the actual operating thermal power units exceeds a threshold, adjusting the number of newly put into random R mode thermal power units and their regulation rates includes: remotely adjusting the real-time regulation rates of the existing n random R mode thermal power units in the power grid to the maximum allowable regulation rate. to and calculate The current order of thermal power units waiting to be put into random R mode is from n+1 to n+m, corresponding to their maximum allowable adjustment rate. to Through superposition calculation, the result is calculated in real time. Obtain the value of j; put the (n+1)th to (n+j)th generator units into random R mode and remotely adjust the adjustment rate to the maximum. Where n+j represents the (n+j)th thermal power unit among units n+1 to n+m that is waiting to be put into random R mode, and the value of j should satisfy... , The maximum allowable adjustment rate for the (n+j-1)th thermal power unit is... This represents the maximum allowable adjustment rate for the (n+j)th thermal power unit. The overall power change rate of new energy sources; This refers to the overall adjustment rate of the actual operating thermal power units.

8. The dynamic control system for thermal power units according to claim 7, characterized in that, When analyzing the rapid power changes of a single renewable energy power plant and calculating the rate of change of renewable energy power, the single rate calculation module uses the following formula to analyze the rapid power changes of a single renewable energy power plant and calculate the rate of change of renewable energy power: In the formula, For a unit of time period; For the i-th new energy power station in a unit time period The rate of change of active power within; This represents the rate of change of active power as planned for the day. This refers to the maximum limit for active power variation specified in the standard. At a certain time on that day; For the i-th new energy power station Active power at any given moment; The i-th new energy power station Active power at any given moment.

9. The dynamic control system for thermal power units according to claim 8, characterized in that, When calculating the overall power change rate of renewable energy based on the power change rate of a single renewable energy power station, the overall rate calculation module uses the following formula to calculate the overall power change rate of renewable energy based on the power change rate of a single renewable energy power station: In the formula, The overall power change rate of new energy sources; For the i-th new energy power station in a unit time period The rate of change of active power within the grid; n is the number of grid-connected renewable energy power plants in the current power grid.

10. The dynamic control system for thermal power units according to claim 7, characterized in that, When the rate adjustment module determines that the rate is positive, it adjusts the rate of the thermal power unit when the difference between the overall power change rate of the new energy source and the overall adjustment rate of the actual operating thermal power unit is less than or equal to a threshold. When the difference between the overall power change rate of the new energy source and the overall adjustment rate of the actual operating thermal power unit is greater than a threshold, it adjusts the number of newly commissioned random R mode thermal power units and their adjustment rates.

11. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method of any one of claims 1 to 6.

12. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method of any one of claims 1 to 6.

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