An ACE distribution factor calculation method and system considering active control strategy

Abstract

The application discloses an ACE distribution factor calculation method and system considering an active control strategy, and belongs to the field of power system dispatching.The ACE distribution factor calculation method comprises the following steps: determining an adjustable AGC unit participating in active control and an actual active regulation amount of the AGC unit based on regional regulation demand power of each control area, regulation characteristic parameters of the AGC unit and an active control strategy of the AGC unit; constructing a probability distribution model of a response deviation coefficient based on historical operation data of the AGC unit, correcting the actual active regulation amount to obtain a credible active regulation amount under a given confidence level; and calculating ACE distribution factors of each control area based on the credible active regulation amount, combining node active output and active sensitivity coefficients of control area interconnection lines.The ACE distribution factors are solved by combining the active control strategy and unit response uncertainty, the influence of ACE control of each control area on inter-provincial interconnection line power flow is quantified, and technical support is provided for ACE control decision-making of frequency quality and interconnection line safety coordination optimization.

Description

Technical Field

[0001] This invention relates to technologies related to power system operation and control, specifically to a method and system for calculating the ACE distribution factor considering active power control strategies. Background Technology

[0002] With the accelerated construction of new power systems, the installed capacity of new energy sources has experienced a leapfrog growth. However, their output is characterized by strong volatility and randomness, while the frequency regulation capability of conventional power sources is increasingly insufficient, posing a severe challenge to the active power control of the power grid. On the one hand, to improve frequency regulation capability, new resources such as new energy sources and energy storage are being incorporated into AGC (Automatic Generation Control). However, their inherent uncertainties significantly increase the deviation of AGC command responses, thereby exacerbating the uncertainty of the impact of active power control in each control area on the power flow of inter-provincial tie lines. On the other hand, large-scale grid connection of new energy sources has led to a significant increase in active power fluctuations. Strict control of tie line outlet power in each control area can easily cause frequent AGC reversals by generating units, exacerbating frequency fluctuations. Grid-province coordinated control can alleviate regional reversal problems, but existing coordinated schemes have not achieved accurate quantification of power flow constraints at inter-provincial cross-sections. Against this backdrop, it is urgent to consider the uncertainty of new resource responses and to conduct precise quantification of the impact of ACE (Active Energy Control) in each control area on the power flow of inter-regional tie lines, in order to achieve coordinated optimization control of system frequency stability and tie line power flow security.

[0003] Traditionally, when quantifying the impact of active power control in multiple control areas on tie-line power flow, linear equivalent conversion using the static sensitivity of control area nodes and tie-lines is commonly employed. However, this simplified approach has several drawbacks. First, the Active Power Distribution Factor (ACE) represents the entire set of external tie-line cross-sections, failing to account for specific tie-line cross-section constraints. Furthermore, there is no fixed sensitivity relationship between ACE and each tie-line, leading to theoretical flaws in using fixed sensitivity to correlate ACE with cross-sectional power flow. Second, AGC unit dispatch varies under different active power control strategies in different control areas. The tie-line power flow offset caused by active power control is strongly correlated with the unit connection location and grid topology within the area. Existing ACE distribution factor calculations fail to adequately consider the differentiated impact of unit output changes under different strategies on tie-line power flow. Third, existing strategies assume zero-error unit tracking commands, neglecting the uncertainty of responses to new resources. This uncertainty further increases the calculation error of tie-line power flow offset. In summary, the ACE distribution factor calculated by existing methods is insufficient to accurately quantify the impact of active power control in control areas on tie-line power flow. Therefore, it is urgent to research ACE distribution factor calculation methods adapted to actual grid active power control. Summary of the Invention

[0004] The purpose of this invention is to provide a method and system for calculating the ACE distribution factor that considers active power control strategies. This solution can solve the problems that existing ACE distribution factors cannot adapt to specific tie-line section constraints, cannot be compatible with proportional sharing and control strategies with different priorities, and lack consideration for the uncertainty of responses to new resources. It also solves the problem that existing methods are difficult to accurately quantify the impact of active power control in multiple control areas on tie-line power flow.

[0005] The present invention adopts the following technical solution.

[0006] The first aspect of this invention proposes a method for calculating the ACE distribution factor considering active power control strategies, comprising: Obtain the regional control deviation (ACE) for each control zone, and obtain the active power control strategy, regulation characteristic parameters, historical operating data, and active power output-control zone tie line active power sensitivity coefficient for AGC units in each control zone. Each control zone calculates the regional regulation demand power based on the regional control deviation ACE and the regulation characteristic parameters of the AGC units. Combining the regional regulation demand power, the active power control strategy of the AGC units, and the regulation characteristic parameters of the AGC units, the adjustable AGC units participating in active power control and their actual active power regulation amounts are determined in each control cycle. Taking into account the response uncertainty of adjustable AGC units, a probability distribution model of the response deviation coefficient is constructed based on the historical operating data of the adjustable AGC units. The quantile of the response deviation coefficient of each adjustable AGC unit under the current operating conditions at the set confidence level is obtained through the probability distribution model. Combining the actual active power regulation amount issued by each adjustable AGC unit and the quantile of the response deviation coefficient at the set confidence level, the reliable active power regulation amount of the adjustable AGC units participating in active power control in each control cycle is calculated. Based on the adjustable AGC units participating in active power control within each control cycle, their reliable active power adjustment and active power output-control interval tie line active power sensitivity coefficient, the ACE distribution factor of each control zone is calculated.

[0007] Preferably, the active power control strategy, regulation characteristic parameters, historical operating data, and active power output-control interval tie line active power sensitivity coefficient of the AGC units in each control area are obtained, specifically as follows: The active power control strategy of the AGC unit includes the active power allocation strategy, and the active power allocation strategy of each control area includes two methods: proportional sharing and priority. The regulation characteristic parameters of the AGC unit include adjustable state, control mode, base point power, current actual active power, upper limit of active power output, lower limit of active power output, target active power output of the previous control cycle, and active power regulation ramp rate and ramp rate; the control modes of the AGC unit include AUTOR and SCHER. The base point power of AUTOR mode is the current actual active power, and the base point power of SCHER mode is the planned active power. The historical operating data of AGC units in each control area includes: the historical actual active power regulation and the historical actual active power regulation of all AGC units in all control cycles within the set historical period; each control cycle within the historical period is used as a sample. The active power output of the AGC unit and the active power sensitivity coefficient of the control interval tie line are the changes in active power of the control interval tie line caused by the change in the active power output of the AGC unit.

[0008] Preferably, each control zone calculates its regional regulation demand power based on the regional control deviation ACE and the regulation characteristic parameters of the AGC unit, specifically as follows: The initial value of the regional regulation demand power in each control cycle of each control area is taken as the negative of the regional control deviation (ACE) of each control area. The difference between the target active power output of all AGC units in each control area in the previous control cycle and the current actual active power is iterated. If the difference is greater than 0, the difference is the remaining active power regulation total, and the corresponding AGC unit is the AGC unit that has not completed the active power response of the previous control cycle. The remaining active power regulation total of all AGC units that have not completed the active power response of the previous control cycle is added together to obtain the expected remaining active power regulation total. The initial value of the regional regulation demand power is subtracted from the expected remaining active power regulation total to obtain the regional active power regulation demand of each control area in each control cycle.

[0009] Preferably, by combining the regional regulation demand power, the active power control strategy of the AGC units, and the regulation characteristic parameters of the AGC units, the adjustable AGC units participating in active power control and their actual active power regulation amounts are determined in each control cycle, specifically as follows: Within each control cycle, if the adjustable state of the AGC unit in the corresponding control cycle is adjustable, then the corresponding AGC unit is an adjustable AGC unit. The upper and lower limits of the active power adjustment of the adjustable AGC unit are calculated based on the adjustment characteristic parameters of the adjustable AGC unit. When the regional regulation demand power of the control area is greater than or equal to the sum of the active power regulation upper limits of all adjustable AGC units, the actual active power regulation amount issued by all adjustable AGC units is the active power regulation upper limit of the corresponding adjustable AGC unit. When the regional regulation demand power is less than or equal to the negative of the sum of the active power regulation lower limits of all adjustable AGC units, the single actual active power regulation amount issued by all adjustable AGC units is the active power regulation lower limit of the corresponding adjustable AGC unit. When the regional regulation demand power of the control area is less than the sum of the upper limit values ​​of the active power regulation of all adjustable AGC units and greater than the negative of the sum of the lower limit values ​​of the active power regulation of all adjustable AGC units, the adjustable AGC units participating in active power control in each control area and their actual active power regulation amount are determined in each control cycle according to the active power allocation strategy in the active power control strategy of the adjustable AGC units, based on the regional regulation demand power, the control mode of the adjustable AGC units, and the upper and lower limit values ​​of the active power regulation.

[0010] Preferably, the upper and lower limits of the active power regulation of the adjustable AGC unit are calculated based on the regulation characteristic parameters of the adjustable AGC unit, specifically as follows: When the adjustable AGC unit is a thermal power unit, hydropower unit, or new energy unit, the upper limit of active power regulation is the product of the active power regulation ramp rate and the control cycle duration; the lower limit of active power regulation is the product of the active power regulation ramp rate and the control cycle duration. When the adjustable AGC unit is an energy storage unit, the difference between the state of charge of the adjustable AGC unit and the corresponding lower limit of SOC is multiplied by the rated capacity and then divided by the control cycle duration to obtain the upper limit of active power regulation; the difference between the corresponding upper limit of SOC and the state of charge of the adjustable AGC unit is multiplied by the rated capacity and then divided by the control cycle duration to obtain the lower limit of active power regulation. For all types of adjustable AGC units, if the calculated upper limit of active power regulation is greater than or equal to the difference between the upper limit of active power output and the current actual active power, then the upper limit of active power regulation will be adjusted to the difference between the upper limit of active power output and the current actual active power; otherwise, the upper limit of active power regulation will remain unchanged. If the calculated lower limit of active power regulation is greater than or equal to the difference between the current actual active power and the lower limit of active power output, then the lower limit of active power regulation will be adjusted to the difference between the current actual active power and the lower limit of active power output; otherwise, the lower limit of active power regulation will remain unchanged.

[0011] Preferably, according to the active power allocation strategy in the active power control strategy of the adjustable AGC unit, the adjustable AGC units participating in active power control in each control zone and their actual active power adjustment amounts are determined in each control cycle, specifically as follows: If the active power allocation strategy is a proportional sharing strategy, all the adjustable AGC units are adjustable AGC units participating in active power control; obtain the proportional sharing factor of each adjustable AGC unit in the proportional sharing strategy; The initial active power regulation of each adjustable AGC unit is obtained by allocating the regional regulation demand power based on the proportional sharing factor, control mode, and upper and lower limits of active power regulation; the current active power allocation regulation is the initial active power regulation. The remaining regional regulation demand power is obtained by subtracting the total allocated power from the regional regulation demand power. The total allocated power is the sum of the current active power allocation regulation amounts of all adjustable AGC units. If the remaining regional regulation demand power is greater than the set minimum demand power, the remaining regional regulation demand power is allocated based on the proportional sharing factor, control mode, and upper and lower limits of active power regulation to obtain the redistributed active power regulation amount for each adjustable AGC unit. The redistributed active power allocation regulation amount is then superimposed with the current active power allocation regulation amount of the corresponding adjustable AGC unit to obtain the updated current active power allocation regulation amount. The remaining regional regulation demand power is then... The updated remaining regional regulation demand power is obtained by subtracting the total allocated power from the calculated power. If the remaining regional regulation demand power is still greater than the set minimum demand power, the above process is repeated starting from allocating the remaining regional regulation demand power based on the proportional sharing factor, control mode, and upper and lower limits of active power regulation to obtain the redistribution active power regulation amount for each adjustable AGC unit, until the remaining regional regulation demand power is less than or equal to the set minimum demand power. If the remaining regional regulation demand power is less than or equal to the set minimum demand power, the actual active power regulation amount issued to each adjustable AGC unit is the current active power allocation regulation amount. The actual active power regulation is adjusted based on the direction of the actual active power regulation and the cumulative amount of active power allocation.

[0012] Preferably, the initial active power regulation of each adjustable AGC unit is obtained by allocating the regional regulation demand power based on the proportional sharing factor, control mode, and upper and lower limits of active power regulation, specifically as follows: Normalize all proportional sharing factors, for the th m The first control area c The first control cycle i For each adjustable AGC unit, the product of the regional active power regulation demand of the corresponding control area and the normalized proportional sharing factor of the corresponding adjustable AGC unit is used as the first power of the corresponding adjustable AGC unit. If the control mode of the adjustable AGC unit is AUTOR, then the initial active power regulation of the corresponding adjustable AGC unit is the first power of the corresponding adjustable AGC unit; if the control mode of the adjustable AGC unit is SCHER, then the initial active power regulation of the corresponding adjustable AGC unit is the sum of the first power, the planned active power, and the current actual active power of the corresponding adjustable AGC unit. When the initial active power regulation of the adjustable AGC unit is greater than or equal to the upper limit of the active power regulation of the corresponding adjustable AGC unit, the initial active power regulation is adjusted to the upper limit of the active power regulation of the corresponding adjustable AGC unit; when the initial active power regulation of the adjustable AGC unit is less than or equal to the lower limit of the active power regulation of the corresponding adjustable AGC unit, the initial active power regulation is adjusted to the lower limit of the active power regulation of the corresponding adjustable AGC unit; when the initial active power regulation of the adjustable AGC unit is greater than the lower limit of the active power regulation of the corresponding adjustable AGC unit but less than the upper limit of the active power regulation of the corresponding adjustable AGC unit, the initial active power regulation remains unchanged.

[0013] Preferably, the actual active power regulation is corrected based on the direction of the actual active power regulation and the cumulative active power distribution, specifically as follows: If the actual active power regulation of each adjustable AGC unit is in the same direction as the total regional regulation demand, the actual active power regulation of the corresponding adjustable AGC unit remains unchanged; if the direction is opposite, the actual active power regulation of the corresponding adjustable AGC unit is set to zero. Set the active power allocation accumulation and initialize it to zero. Traverse each adjustable AGC unit in ascending order of unit number. Add the current value of the active power allocation accumulation to the actual active power adjustment amount of the currently traversed adjustable AGC unit to obtain the superimposed adjustment amount. If the absolute value of the superimposed adjustment amount is less than the preset dead zone threshold of the corresponding adjustable AGC unit, update the active power allocation accumulation and set the actual active power adjustment amount of the AGC unit to zero. Otherwise, use the superimposed adjustment amount as the actual active power adjustment amount of the corresponding adjustable AGC unit and clear the active power allocation accumulation to zero. After the traversal is completed, discard any remaining active power allocation accumulation.

[0014] Preferably, according to the active power allocation strategy in the active power control strategy of the adjustable AGC unit, the adjustable AGC units participating in active power control in each control zone and their actual active power adjustment amounts are determined in each control cycle, specifically as follows: If the active power allocation strategy in the active power control strategy of the adjustable AGC unit is a priority strategy, then obtain the up-adjustment and down-adjustment priorities for each adjustable AGC unit. If the regional regulation demand is an upward demand, then all adjustable AGC units in the control area will be sorted from largest to smallest according to the upward priority, and the active power regulation upper limit of all adjustable AGC units will be added up sequentially according to the sorting. If the regional regulation demand power is less than or equal to the active power regulation upper limit of the first adjustable AGC unit, then only the first adjustable AGC unit is an adjustable AGC unit participating in active power control; the actual active power regulation amount issued by the first adjustable AGC unit is the regional regulation demand power. If the regional regulation demand power is greater than the sum of the active power regulation upper limits of the first j-1 adjustable AGC units but less than or equal to the sum of the active power regulation upper limits of the first j adjustable AGC units, then all the first j adjustable AGC units are adjustable AGC units participating in active power control; and the actual active power regulation amount issued by the first j-1 adjustable AGC units is the corresponding active power regulation upper limit of the adjustable AGC unit; the actual active power regulation amount issued by the j-th adjustable AGC unit is equal to the regional regulation demand power minus the sum of the active power regulation upper limits of the first j-1 adjustable AGC units; If the regional regulation demand power is greater than the sum of the active power regulation upper limits of all adjustable AGC units, then all adjustable AGC units are adjustable AGC units participating in active power control; and the actual active power regulation amount issued by all adjustable AGC units is the corresponding active power regulation upper limit of the adjustable AGC unit.

[0015] Preferably, if the regional regulation demand power is a downward demand, then all adjustable AGC units in the control area are sorted from largest to smallest according to the downward priority, and the absolute values ​​of the active power regulation lower limit of all adjustable AGC units are superimposed in order of sorting. If the absolute value of the regional regulation demand power is less than or equal to the absolute value of the active power regulation lower limit of the first adjustable AGC unit, then only the first adjustable AGC unit is an adjustable AGC unit participating in active power control; the actual active power regulation amount issued by the first adjustable AGC unit is the regional regulation demand power. If the absolute value of the regional regulation demand power is greater than the sum of the absolute values ​​of the active power regulation lower limits of the first j-1 adjustable AGC units and less than or equal to the sum of the absolute values ​​of the active power regulation lower limits of the first j adjustable AGC units, then the first j adjustable AGC units are all adjustable AGC units participating in active power control; and the actual active power regulation amount issued by the first j-1 adjustable AGC units is the corresponding active power regulation lower limit value of the adjustable AGC unit; subtract the sum of the absolute values ​​of the active power regulation lower limits of the first j-1 adjustable AGC units from the absolute value of the regional regulation demand power, and the negative number of the subtraction result is the actual active power regulation amount issued by the j-th adjustable AGC unit. If the absolute value of the regional regulation demand power is greater than the sum of the absolute values ​​of the active power regulation lower limits of all adjustable AGC units, then all adjustable AGC units are adjustable AGC units participating in active power control; and the actual active power regulation amount issued by all adjustable AGC units is the corresponding active power regulation lower limit of the adjustable AGC unit.

[0016] Preferably, the quantile of the response deviation coefficient of each adjustable AGC unit under the current operating conditions at a set confidence level is obtained through a probability distribution model; combining the actual active power regulation amount issued by each adjustable AGC unit and the quantile of the response deviation coefficient at the set confidence level, the reliable active power regulation amount of the adjustable AGC unit participating in active power control in each control cycle is calculated, specifically: Valid samples are selected from the historical operating data of the adjustable AGC unit. When the historical actual active power regulation of the adjustable AGC unit in a sample is greater than or equal to the preset historical regulation threshold, and the historical actual active power regulation does not exceed the preset multiple threshold of the historical actual active power regulation, and the historical actual active power regulation is in the same direction as the historical actual active power regulation, the corresponding sample is considered valid; otherwise, the corresponding sample is considered invalid. Calculate the response deviation coefficient for each valid sample of each adjustable AGC unit. The response deviation coefficient is the ratio of the historical actual active power adjustment to the historical actual active power dispatch adjustment. Based on the historical operating conditions of each adjustable AGC unit, the command response deviation coefficient of the adjustable AGC unit is combined and divided into several boxes, and each box contains several samples; the operating conditions include the direction of the actual active power regulation, the actual active power before the regulation, and the range in which the actual active power regulation is located. For each chamber, the probability density function of all response deviation coefficients in the chamber is fitted using the kernel density method. The fitted probability density function is integrated to obtain the cumulative distribution function. The lower quantile of the cumulative distribution function at the set confidence level is used as the quantile of the response deviation coefficient of the corresponding chamber at the set confidence level. The quantile of the response deviation coefficient of the box corresponding to the operating condition of each adjustable AGC unit participating in active power control at the set confidence level is taken as the response deviation coefficient of the corresponding adjustable AGC unit participating in active power control. Divide the actual active power regulation amount issued by the corresponding adjustable AGC unit participating in active power control by the response deviation coefficient of the corresponding adjustable AGC unit participating in active power control to obtain the reliable active power regulation amount of the corresponding adjustable AGC unit participating in active power control.

[0017] Preferably, based on the adjustable AGC units participating in active power control within each control cycle, their reliable active power regulation, and the active power output-control interval tie line active power sensitivity coefficient, the ACE distribution factor for each control zone is calculated, specifically as follows: For each control cycle within the control area, the product of the active power output of each adjustable AGC unit participating in active power control and the active power sensitivity coefficient of the control interval tie line and the reliable active power adjustment amount is calculated as the power change generated in the tie line when the corresponding adjustable AGC unit participating in active power control is adjusted. The power changes generated in the tie line during the adjustment of all adjustable AGC units involved in active power control are summed and then divided by the regional control deviation of the corresponding control area to obtain the ACE distribution factor of the corresponding control area for the corresponding control cycle.

[0018] A second aspect of the present invention proposes an ACE distribution factor calculation system based on the method described in the first aspect of the present invention, considering active power control strategies, comprising: a data acquisition module, an active power command calculation module, a reliable active power regulation calculation module, and an ACE distribution factor calculation module, specifically: Data acquisition module: used to acquire the regional control deviation (ACE) of each control zone, and to acquire the active power control strategy, regulation characteristic parameters, historical operating data, and active power output-control zone tie line active power sensitivity coefficient of the AGC units in each control zone; Active power instruction calculation module: It is used to calculate the regional regulation demand power of each control zone based on the regional control deviation ACE and the regulation characteristic parameters of the AGC unit. Combining the regional regulation demand power, the active power control strategy of the AGC unit and the regulation characteristic parameters of the AGC unit, it determines the adjustable AGC unit participating in active power control and its actual active power regulation amount in each control cycle. The reliable active power regulation calculation module takes into account the response uncertainty of adjustable AGC units. Based on the historical operating data of the adjustable AGC units, it constructs a probability distribution model of the response deviation coefficient. Through the probability distribution model, it obtains the quantile of the response deviation coefficient of each adjustable AGC unit under the current operating conditions at the set confidence level. Combining the actual active power regulation issued by each adjustable AGC unit and the quantile of the response deviation coefficient at the set confidence level, it calculates the reliable active power regulation of the adjustable AGC units participating in active power control in each control cycle. ACE Distribution Factor Calculation Module: Used to calculate the ACE distribution factor of each control zone based on the adjustable AGC units participating in active power control within each control cycle, their reliable active power adjustment, and the active power output-control zone tie line active power sensitivity coefficient.

[0019] A third aspect of the present invention provides an ACE distribution factor calculation device considering an active power control strategy, comprising a processor and a memory, wherein the memory stores computer instructions, and the processor executes the computer instructions stored in the memory. When the computer instructions are executed by the processor, the device implements the steps of the ACE distribution factor calculation method considering an active power control strategy as described in the first aspect of the present invention.

[0020] A fourth aspect of the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the ACE distribution factor calculation method considering active power control strategies as described in the first aspect of the present invention.

[0021] The beneficial effects of this invention are that, compared with the prior art, it addresses the problem that traditional ACE distribution factors are difficult to accurately quantify the impact of active power control in each control area on the power flow of inter-provincial tie lines. This invention proposes a method and system for calculating the ACE distribution factor that considers active power control strategies. Based on the active power control strategy of the control area and the operating data of AGC units, this method determines the adjustable AGC units participating in active power control and their actual active power regulation. Furthermore, based on historical operating data of the AGC units, it constructs a probability distribution model of response deviation to calculate the credible active power regulation at a given confidence level. Finally, combining the active power output of nodes with the active power sensitivity coefficient of tie lines in the control area, it calculates the ACE distribution factor of each control area, thereby achieving accurate quantification of the impact of active power control in each control area on the power flow of inter-provincial tie lines. This method overcomes the limitations of traditional fixed sensitivity equivalent conversion and solves the shortcomings of existing methods that do not fully consider the uncertainty of active power control strategies and unit responses, and are difficult to accurately characterize the impact of ACE on tie line power flow. It provides a quantitative means for tie line power flow constraints to achieve multi-control area coordinated control and provides technical support for improving the frequency control performance and operational safety of large power grids. The method proposed in this invention is not limited to a single simulation software, but is applicable to all graphical modeling and simulation software. Attached Figure Description

[0022] Figure 1 This is a flowchart illustrating a method for calculating the ACE distribution factor considering active power control strategies, as disclosed in an embodiment of the present invention. Figure 2 This is a schematic diagram of the structure of an ACE distribution factor calculation system that considers active power control strategy, as disclosed in an embodiment of the present invention. Figure 3 This is a schematic diagram of the structure of an ACE distribution factor calculation device that considers active power control strategy, as disclosed in an embodiment of the present invention. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this invention. The embodiments described in this application are merely some embodiments of this invention, and not all embodiments. Based on the spirit of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this invention.

[0024] Example 1: like Figure 1 As shown, Embodiment 1 of the present invention discloses a method for calculating the ACE distribution factor considering active power control strategies. Wherein, Figure 1The described method for calculating the ACE distribution factor considering active power control strategies is applicable to power systems, such as for grid-province AGC collaborative optimization control considering tie-line security constraints. This invention does not limit its application to specific applications. Figure 1 As shown, the method for calculating the ACE distribution factor considering the active power control strategy can include the following operations: S1. Each control area power grid obtains the regional control deviation ACE of each control area power grid through the dispatch automation system, and obtains the active power control strategy, regulation characteristic parameters, historical operating data, and active power output-control area tie line active power sensitivity coefficient of the AGC units in each control area power grid. In this preferred embodiment, the active power control strategy, regulation characteristic parameters, historical operating data, and active power output-control section tie line active power sensitivity coefficient of the AGC units within each control area power grid are obtained, specifically: When controlling the active power of AGC units, the regional regulation demand power is calculated first and then the active power is allocated. The active power control strategy of AGC units obtained by this invention is an active power allocation strategy. The active power allocation strategy of each control area includes two methods: proportional sharing and priority. The regulation characteristic parameters of the AGC unit include adjustable state, control mode, base point power, current target active power output, current actual active power output, upper limit of active power output, target active power output of the previous control cycle, lower limit of active power output, and active power regulation ramp rate and ramp rate. The control modes of the AGC unit include AUTOR and SCHER. The base point power of AUTOR mode is the current actual active power, and the base point power of SCHER mode is the planned active power. The historical operating data of AGC units in each control area power grid includes: the historical actual active power regulation of all AGC units in all control cycles within the set historical period, the historical actual active power regulation, and the actual active power value of AGC units before the issuance of AGC commands in each control cycle; each control cycle within the historical period is treated as a sample. The active power output-control section tie line active power sensitivity coefficient of the AGC unit is the change in active power of the control section tie line caused by a unit power change in the active power output of the AGC unit. Specifically, in this embodiment, the unit power is 1MW.

[0025] S2. Each control area power grid calculates the regional regulation demand power based on the regional control deviation ACE and the regulation characteristic parameters of the AGC units. Combining the regional regulation demand power, the active power control strategy of the AGC units, and the regulation characteristic parameters of the AGC units, the adjustable AGC units participating in active power control and their actual active power regulation amounts are determined in each control cycle. The specific implementation process of step S2 is as follows: S2.1 The initial value of the regional regulation demand power in each control cycle of the power grid in each control area is taken as the negative of the regional control deviation ACE of each control area. The difference between the target active power output of all AGC units in each control area in the previous control cycle and the current actual active power is traversed. If the difference is greater than 0, the difference is the remaining active power regulation total, and the corresponding AGC unit is the AGC unit that has not completed the active power response of the previous control cycle. The remaining active power regulation total of all AGC units that have not completed the active power response of the previous control cycle is superimposed as the expected remaining active power regulation total. The initial value of the regional regulation demand power is subtracted from the expected remaining active power regulation total to obtain the regional active power regulation demand of each control area power grid in each control cycle.

[0026] S2.2. In each control cycle, if the adjustable state of the AGC unit corresponding to the control cycle is adjustable, then the corresponding AGC unit is an adjustable AGC unit. When the adjustable AGC unit is a thermal power unit, hydropower unit, or new energy unit, the first m The first control area c The first control cycle i The calculation method for the upper and lower limits of active power regulation of the adjustable AGC unit is as follows:

[0027] in, , The first m The first control area c The first control cycle i The platform can adjust the upper and lower limits of active power regulation for thermal power units, hydropower units, or new energy units. , The first m The first control area i The platform can adjust the upper and lower limits of active power output for thermal power units, hydropower units, or new energy units. For the first m The first control area c The first control cycle i The current actual active power of the adjustable AGC thermal power unit, hydropower unit, or new energy unit. , The first m The first control area i The adjustable AGC system can regulate the active power output and ramp rate of thermal power units, hydropower units, or new energy units. To control the cycle duration.

[0028] When the adjustable AGC unit is an energy storage unit, the first m The first control area c The first control cycle iThe calculation method for the active power upper and lower adjustment limits of the adjustable AGC unit is as follows:

[0029] in, , The first m The first control area c The first control cycle i The upper and lower limits of active power regulation for the adjustable AGC energy storage unit. , The first m The first control area i The maximum discharge power and charging power of the adjustable AGC energy storage unit. For the first m The first control area c The first control cycle i The current actual active power of the adjustable AGC energy storage unit. For the first m The first control area c The first control cycle i The state of charge of the adjustable AGC energy storage unit. , The first m The first control area i The upper and lower limits of SOC for the adjustable AGC energy storage unit. For the first m The first control area i Rated capacity of the adjustable AGC energy storage unit.

[0030] S2.3 When the regional regulation demand power of the control area is greater than or equal to the sum of the active power regulation upper limits of all adjustable AGC units, the actual active power regulation amount issued by all adjustable AGC units is the active power regulation upper limit of the corresponding adjustable AGC unit. When the regional regulation demand power is less than or equal to the negative number of the sum of the active power regulation lower limits of all adjustable AGC units, the single actual active power regulation amount issued by all adjustable AGC units is the active power regulation lower limit of the corresponding adjustable AGC unit. When the regional regulation demand power of the control area is less than the sum of the upper limit values ​​of the active power regulation of all adjustable AGC units and greater than the negative number of the sum of the lower limit values ​​of the active power regulation of all adjustable AGC units, if the active power allocation strategy in the active power control strategy of the adjustable AGC unit is a proportional sharing strategy, then proceed to S2.4; if the active power allocation strategy in the active power control strategy of the adjustable AGC unit is a priority strategy, then proceed to S2.5.

[0031] S2.4 If the active power allocation strategy in the active power control strategy of the adjustable AGC unit is a proportional sharing strategy, based on the regional regulation demand power of the control area, combined with the control mode and active power regulation upper and lower limits of all adjustable AGC units, determine the adjustable AGC units participating in active power control of the power grid in each control area and their actual active power regulation amounts in each control cycle, specifically as follows: Under the proportional sharing strategy, all adjustable AGC units participate in active power control. First, based on the regional regulation demand power of the control area within each control cycle and the obtained proportional sharing factor for each adjustable AGC unit within the control area, the regional regulation demand power is allocated based on the proportional sharing factor, control mode, and upper and lower limits of active power regulation to obtain the initial active power regulation amount for each adjustable AGC unit. The current active power allocation regulation amount is the initial active power regulation amount, specifically: For adjustable AGC units with AUTOR control mode, the initial active power regulation is... for:

[0032] in, For the first m The first control area c The first control cycle i The initial active power distribution adjustment of the adjustable AGC unit. For the first m The first control area c Regional active power regulation demand for each control cycle For the first i The proportional sharing factor of the adjustable AGC unit. n For the first m The first control area c The number of AGC units with adjustable control cycles.

[0033] For adjustable AGC units with SCHER control mode, the initial active power distribution adjustment is:

[0034] in, For the first m The first control area c The first control cycle i The planned active power of the adjustable AGC unit. For the first m The first control area c The first control cycle i The current actual active power of the adjustable AGC unit.

[0035] When the initial active power regulation of the adjustable AGC unit is greater than or equal to the upper limit of the active power regulation of the corresponding adjustable AGC unit, the initial active power regulation is adjusted to the upper limit of the active power regulation of the corresponding adjustable AGC unit; when the initial active power regulation of the adjustable AGC unit is less than or equal to the lower limit of the active power regulation of the corresponding adjustable AGC unit, the initial active power regulation is adjusted to the lower limit of the active power regulation of the corresponding adjustable AGC unit; when the initial active power regulation of the adjustable AGC unit is greater than the lower limit of the active power regulation of the corresponding adjustable AGC unit but less than the upper limit of the active power regulation of the corresponding adjustable AGC unit, the initial active power regulation remains unchanged.

[0036] The remaining regional regulation demand power is obtained by subtracting the total allocated power from the regional regulation demand power, where the total allocated power is the sum of the current active power allocation adjustments of all adjustable AGC units. If the remaining regional regulation demand power is greater than the set minimum demand power, the remaining regional regulation demand power is allocated among adjustable AGC units whose initial active power allocation adjustment is less than their active power limit based on the proportional sharing factor, control mode, and active power adjustment upper and lower limits. This results in the redistributed active power adjustment amount for the corresponding adjustable AGC unit. The redistributed active power allocation adjustment amount is then superimposed with the current active power allocation adjustment amount for the corresponding adjustable AGC unit to obtain the updated current active power allocation adjustment amount. The remaining regional regulation demand power is then subtracted from the total allocated power to obtain the updated remaining regional regulation demand power. If the remaining regional regulation demand power is still greater than the set minimum demand power, the above process is repeated starting from the redistributed active power adjustment amount for each adjustable AGC unit obtained by allocating the remaining regional regulation demand power based on the proportional sharing factor, control mode, and active power adjustment upper and lower limits, until the remaining regional regulation demand power is less than or equal to the set minimum demand power. If the remaining regional regulation demand power is less than or equal to the set minimum demand power, the actual active power regulation amount issued by each adjustable AGC unit is the current active power allocation regulation amount; specifically, the set minimum demand power is 2MW, and setting the minimum demand power avoids excessive power allocation; Iterate through all adjustable AGC units and determine whether the actual active power regulation of each adjustable AGC unit is in the same direction as the total regional regulation demand. If the actual active power regulation of each adjustable AGC unit is in the same direction as the total regional regulation demand, the actual active power regulation of the corresponding adjustable AGC unit remains unchanged; if the directions are opposite, the actual active power regulation of the corresponding adjustable AGC unit is set to zero. Set the active power allocation accumulation and initialize it to zero. Traverse each adjustable AGC unit in ascending order of unit number. Add the current value of the active power allocation accumulation to the actual active power adjustment amount of the currently traversed adjustable AGC unit to obtain the superimposed adjustment amount. If the absolute value of the superimposed adjustment amount is less than the preset dead zone threshold of the corresponding adjustable AGC unit, update the active power allocation accumulation and set the actual active power adjustment amount of the AGC unit to zero. Otherwise, use the superimposed adjustment amount as the actual active power adjustment amount of the corresponding adjustable AGC unit and clear the active power allocation accumulation to zero. After the traversal is completed, discard any remaining active power allocation accumulation.

[0037] S2.5 If the active power allocation strategy in the active power control strategy of the adjustable AGC unit is a priority strategy, based on the regional regulation demand power of the control area, combined with the control mode and active power regulation upper and lower limits of all adjustable AGC units, determine the adjustable AGC units participating in active power control of the power grid in each control area and their actual active power regulation amounts within each control cycle, specifically as follows: If the active power allocation strategy in the active power control strategy of the adjustable AGC unit is a priority strategy, then obtain the up-adjustment and down-adjustment priorities for each adjustable AGC unit. If the regional regulation demand is an upward demand, then all adjustable AGC units in the control area will be sorted from largest to smallest according to the upward priority, and the active power regulation upper limit of all adjustable AGC units will be added up sequentially according to the sorting. If the regional regulation demand power is less than or equal to the active power regulation upper limit of the first adjustable AGC unit, then only the first adjustable AGC unit is an adjustable AGC unit participating in active power control; the actual active power regulation amount issued by the first adjustable AGC unit is the regional regulation demand power. If the regional regulation demand power is greater than the sum of the active power regulation upper limits of the first j-1 adjustable AGC units but less than or equal to the sum of the active power regulation upper limits of the first j adjustable AGC units, then all the first j adjustable AGC units are adjustable AGC units participating in active power control; and the actual active power regulation amount issued by the first j-1 adjustable AGC units is the corresponding active power regulation upper limit of the adjustable AGC unit; the actual active power regulation amount issued by the j-th adjustable AGC unit is equal to the regional regulation demand power minus the sum of the active power regulation upper limits of the first j-1 adjustable AGC units; If the regional regulation demand power is greater than the sum of the active power regulation upper limits of all adjustable AGC units, then all adjustable AGC units are adjustable AGC units participating in active power control; and the actual active power regulation amount issued by all adjustable AGC units is the corresponding active power regulation upper limit of the adjustable AGC unit.

[0038] If the regional regulation demand power is a downward demand, then all adjustable AGC units in the control area will be sorted from largest to smallest according to the downward priority, and the absolute values ​​of the active power regulation lower limit of all adjustable AGC units will be added together in order of sorting. If the absolute value of the regional regulation demand power is less than or equal to the absolute value of the active power regulation lower limit of the first adjustable AGC unit, then only the first adjustable AGC unit is an adjustable AGC unit participating in active power control; the actual active power regulation amount issued by the first adjustable AGC unit is the regional regulation demand power. If the absolute value of the regional regulation demand power is greater than the sum of the absolute values ​​of the active power regulation lower limits of the first j-1 adjustable AGC units and less than or equal to the sum of the absolute values ​​of the active power regulation lower limits of the first j adjustable AGC units, then the first j adjustable AGC units are all adjustable AGC units participating in active power control; and the actual active power regulation amount issued by the first j-1 adjustable AGC units is the corresponding active power regulation lower limit value of the adjustable AGC unit; subtract the sum of the absolute values ​​of the active power regulation lower limits of the first j-1 adjustable AGC units from the absolute value of the regional regulation demand power, and the negative number of the subtraction result is the actual active power regulation amount issued by the j-th adjustable AGC unit. If the absolute value of the regional regulation demand power is greater than the sum of the absolute values ​​of the active power regulation lower limits of all adjustable AGC units, then all adjustable AGC units are adjustable AGC units participating in active power control; and the actual active power regulation amount issued by all adjustable AGC units is the corresponding active power regulation lower limit of the adjustable AGC unit.

[0039] S3. Taking into account the response uncertainty of adjustable AGC units, a probability distribution model of the response deviation coefficient is constructed based on the historical operating data of the adjustable AGC units. The quantile of the response deviation coefficient of each adjustable AGC unit under the current operating conditions at the set confidence level is obtained through the probability distribution model. Combining the actual active power regulation amount issued by each adjustable AGC unit and the quantile of the response deviation coefficient at the set confidence level, the reliable active power regulation amount of the adjustable AGC units participating in active power control in each control cycle is calculated. The specific implementation process of step S3 is as follows: Valid samples are selected from the historical operating data of the adjustable AGC unit. When the historical actual active power regulation of the adjustable AGC unit in a sample is greater than or equal to the preset historical regulation threshold, and the historical actual active power regulation does not exceed the preset multiple threshold of the historical actual active power regulation, and the historical actual active power regulation is in the same direction as the historical actual active power regulation, the corresponding sample is considered valid; otherwise, the corresponding sample is considered invalid. Calculate the command response deviation coefficient corresponding to each valid sample of each adjustable AGC unit, forming a sample library of response deviation coefficients for each adjustable AGC unit, and define the first... m Within the first control zonei Response deviation coefficient of adjustable AGC unit for:

[0040] in, For the first m The first control area i The historical actual active power regulation of the adjustable AGC unit. For the first m The first control area i The historical active power actual adjustment of the adjustable AGC unit.

[0041] Based on the historical operating conditions of each adjustable AGC unit, the command response deviation coefficients of the adjustable AGC units are combined and binned to generate several bins, each containing several samples. The operating conditions include the direction of the actual active power regulation, the actual active power before regulation, and the range in which the actual active power regulation is located (historical operating conditions include the direction of the historical actual active power regulation, the actual active power before regulation, and the range in which the historical actual active power regulation is located). Considering the direction of the actual active power regulation, the response deviation coefficient sample library of each adjustable AGC unit is binned according to the regulation direction, into an upward regulation response deviation sample library (samples with historical actual active power regulation greater than 0) and a downward regulation response deviation sample library (samples with historical actual active power regulation less than or equal to 0). Considering the actual active power before the command is issued, the actual power of each AGC unit before the command is issued is normalized according to the rated capacity of the unit. The response deviation coefficient sample library of each adjustable AGC unit is divided into bins according to the active power output interval where the normalized value of the actual active power before the command is issued. The set of all active power output intervals is... for:

[0042] in, M The number of intervals, For fixed intervals, .

[0043] Considering the historical range of actual active power regulation (i.e., command size), the response deviation coefficient sample library of each adjustable AGC unit is binned according to command size. Each AGC unit is then divided into command ranges based on the absolute value of its historical actual active power regulation. for:

[0044] in, This is the lower boundary threshold of the (h+1)th instruction interval, and similarly, it is also the upper boundary threshold of the h-th instruction interval. , For the first The upper boundary threshold of each instruction interval is set by the dispatcher based on the typical AGC active power regulation instruction distribution of the power grid. q This represents the number of instruction intervals.

[0045] All the bins obtained above are combined using Cartesian products to form a complete operating condition bin grid. For each adjustable AGC unit's command response deviation coefficient, it is assigned to the corresponding bin based on the historical operating conditions in its corresponding sample. The minimum sample size for each bin is a set value. R If the sample size of a certain box is less than R First, merge the current container with containers in the same active power output range and adjacent command ranges. If the sample size after merging is still less than [a certain value], [further steps are needed]. R Then continue merging with boxes in adjacent output ranges and with the same command range, until the number of samples in the merged box is greater than or equal to 1. R Until then, the final box containing all response deviation samples is obtained; For each response deviation sample box of each adjustable AGC unit, the probability density function of the response deviation coefficient is fitted using the kernel density method. Taking the first variable in the upward adjustment direction of a certain adjustable AGC unit as an example... u Taking a sample box as an example, the box includes R u Sample of response deviation coefficients , For the r-th response deviation coefficient sample, the kernel density estimation method is used to fit the probability density function of the response deviation coefficient corresponding to the sample box, and its probability density estimate is... for:

[0046] Where K(·) is the Gaussian kernel function, h For bandwidth, The independent variable is the probability density function of the response bias coefficient.

[0047] The probability density function of the fitted response deviation coefficient ranges from 0 to x Integrating, we obtain the cumulative distribution function. :

[0048] in, For integration; Let the cumulative distribution function be equal to the given confidence level. β Solving the equation, we obtain the confidence level of the box. β The lower quantile of the response deviation coefficient .

[0049] Repeat the above process until all response deviation sample boxes are traversed, forming a response deviation coefficient quantile table covering all operating conditions; Based on the current operating conditions of the adjustable AGC units participating in active power control in each control cycle, the corresponding response deviation coefficient quantiles are matched from the response deviation coefficient quantile table. Based on the actual active power regulation amount issued by the adjustable AGC unit participating in active power control within each control cycle and the corresponding response deviation coefficient quantile, the reliable active power regulation amount of the adjustable AGC unit participating in active power control within each control cycle is calculated:

[0050] in, For the first m The first control area c The first control cycle The reliable active power regulation of the adjustable AGC unit participating in active power control. For the first m The first control area c The first control cycle The actual active power regulation amount issued by the adjustable AGC unit participating in active power control. For the first m The first control area c The first control cycle The response deviation coefficient quantile of the adjustable AGC unit participating in active power control under the current operating condition.

[0051] S4. Based on the adjustable AGC units participating in active power control and their reliable active power regulation in each control cycle, and combined with the active power output of the adjustable AGC units participating in active power control and the active power sensitivity coefficient of the control interval tie line, the ACE distribution factor of each control area power grid is calculated. The specific implementation process of step S4 is as follows:

[0052] in, For the first c The first control cycle m ACE in each control area on the connecting line l The power flow distribution factor on the surface For the first c The first control cycle m Regional control deviation of each control area For the first m The first control area The change in active power output of the adjustable AGC unit participating in active power control affects the first l Sensitivity coefficient for active power variation of the control interval connecting line.

[0053] This invention, by considering different active power control strategies and unit response correction mechanisms, and combining unit-tie line power flow sensitivity to accurately solve the ACE distribution factor of the control area, achieves precise quantification of the impact of multi-control area active power control on tie line power flow while taking into account unit allocation strategies and unit response uncertainties. This invention provides quantitative support for tie line power flow constraints in collaborative optimization control of multiple control areas in novel power systems, and is beneficial for guiding tie line power flow security assessments that consider differences in active power control strategies and response uncertainties.

[0054] Example 2: like Figure 2 As shown, Embodiment 2 of the present invention discloses an ACE distribution factor calculation system considering active power control strategies. This system can quantify the impact of ACE control in each control area on the power flow of inter-provincial tie lines, and includes: a data acquisition module, an active power command calculation module, a reliable active power regulation calculation module, and an ACE distribution factor calculation module, specifically: Data acquisition module: used to acquire the regional control deviation (ACE) of each control zone, and to acquire the active power control strategy, regulation characteristic parameters, historical operating data, and active power output-control zone tie line active power sensitivity coefficient of the AGC units in each control zone; Active power instruction calculation module: It is used to calculate the regional regulation demand power of each control zone based on the regional control deviation ACE and the regulation characteristic parameters of the AGC unit. Combining the regional regulation demand power, the active power control strategy of the AGC unit and the regulation characteristic parameters of the AGC unit, it determines the adjustable AGC unit participating in active power control and its actual active power regulation amount in each control cycle. The reliable active power regulation calculation module takes into account the response uncertainty of adjustable AGC units. Based on the historical operating data of the adjustable AGC units, it constructs a probability distribution model of the response deviation coefficient. Through the probability distribution model, it obtains the quantile of the response deviation coefficient of each adjustable AGC unit under the current operating conditions at the set confidence level. Combining the actual active power regulation issued by each adjustable AGC unit and the quantile of the response deviation coefficient at the set confidence level, it calculates the reliable active power regulation of the adjustable AGC units participating in active power control in each control cycle. ACE Distribution Factor Calculation Module: Used to calculate the ACE distribution factor of each control zone based on the adjustable AGC units participating in active power control within each control cycle, their reliable active power adjustment, and the active power output-control zone tie line active power sensitivity coefficient.

[0055] Example 3: like Figure 3 As shown, an embodiment of the present invention discloses an ACE distribution factor calculation device that considers active power control strategies. Wherein, Figure 3The described device can be applied to power systems, such as for grid-province AGC collaborative optimization control considering tie-line security constraints, etc., and the embodiments of the present invention are not limited thereto.

[0056] like Figure 3 As shown, the device may include a processor and a memory, the memory storing computer instructions, and the processor executing the computer instructions stored in the memory. When the computer instructions are executed by the processor, the device implements the steps of the method described in the above embodiments and achieves the same technical effect as the above method.

[0057] The memory may include computer system readable media in the form of volatile memory, such as random access memory (RAM) and / or cache memory. The device may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, the memory may be used to read and write non-removable, non-volatile magnetic media (commonly referred to as a "hard disk drive"). A program / utility having a set (at least one) of program modules may be stored in, for example, memory. Such program modules include, but are not limited to, an operating system, one or more application programs, other program modules, and program data. Each or some combination of these examples may include an implementation of a network environment. The program modules typically perform the functions and / or methods described in the embodiments of the present invention.

[0058] The processor executes various functional applications and data processing by running programs stored in memory, such as the method provided in Embodiment 1 of the present invention.

[0059] Example 4: Embodiment 4 of the present invention also provides a computer-readable storage medium storing a computer program thereon. When the program is executed by a processor, it implements the steps of the method described in the above embodiments and achieves the same technical effect as the above method.

[0060] Computer-readable storage media can be tangible devices capable of holding and storing instructions for use by an instruction execution device. Computer-readable storage media can be, for example—but not limited to—electrical storage devices, magnetic storage devices, optical storage devices, electromagnetic storage devices, semiconductor storage devices, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of computer-readable storage media include: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static random access memory (SRAM), portable compact disc read-only memory (CD-ROM), digital multifunction disc (DVD), memory sticks, floppy disks, mechanical encoding devices, such as punch cards or recessed protrusions storing instructions thereon, and any suitable combination of the foregoing. The computer-readable storage media used herein are not to be construed as transient signals themselves, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media (e.g., light pulses through fiber optic cables), or electrical signals transmitted through wires.

[0061] The computer-readable program instructions described herein can be downloaded from computer-readable storage media to various computing / processing devices, or downloaded via a network, such as the Internet, local area network, wide area network, and / or wireless network, to an external computer or external storage device. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and / or edge servers. A network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards them to the computer-readable storage media in the respective computing / processing device.

[0062] Computer program instructions used to perform the operations of this disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, status setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Smalltalk, C++, etc., and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The computer-readable program instructions may execute entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or may be connected to an external computer (e.g., via the Internet using an Internet service provider). In some embodiments, electronic circuitry, such as programmable logic circuitry, field-programmable gate arrays (FPGAs), or programmable logic arrays (PLAs), is personalized by utilizing the status information of the computer-readable program instructions to implement various aspects of this disclosure.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. A method for calculating the ACE distribution factor considering active power control strategies, characterized in that, include: Obtain the regional control deviation (ACE) for each control zone, and obtain the active power control strategy, regulation characteristic parameters, historical operating data, and active power output-control zone tie line active power sensitivity coefficient for AGC units in each control zone. Each control zone calculates the regional regulation demand power based on the regional control deviation ACE and the regulation characteristic parameters of the AGC units. Combining the regional regulation demand power, the active power control strategy of the AGC units, and the regulation characteristic parameters of the AGC units, the adjustable AGC units participating in active power control and their actual active power regulation amounts are determined in each control cycle. Taking into account the response uncertainty of adjustable AGC units, a probability distribution model of the response deviation coefficient is constructed based on the historical operating data of the adjustable AGC units. The quantile of the response deviation coefficient of each adjustable AGC unit under the current operating conditions at the set confidence level is obtained through the probability distribution model. Combining the actual active power regulation amount issued by each adjustable AGC unit and the quantile of the response deviation coefficient at the set confidence level, the reliable active power regulation amount of the adjustable AGC units participating in active power control in each control cycle is calculated. Based on the adjustable AGC units participating in active power control within each control cycle, their reliable active power adjustment and active power output-control interval tie line active power sensitivity coefficient, the ACE distribution factor of each control zone is calculated.

2. The method for calculating the ACE distribution factor considering active power control strategy according to claim 1, characterized in that: Obtain the active power control strategy, regulation characteristic parameters, historical operating data, and active power output-control section tie line active power sensitivity coefficient of AGC units in each control area, specifically: The active power control strategy of the AGC unit includes the active power allocation strategy, and the active power allocation strategy of each control area includes two methods: proportional sharing and priority. The regulation characteristic parameters of the AGC unit include adjustable state, control mode, base point power, current actual active power, upper limit of active power output, lower limit of active power output, target active power output of the previous control cycle, and active power regulation ramp rate and ramp rate; the control modes of the AGC unit include AUTOR and SCHER. The base point power of AUTOR mode is the current actual active power, and the base point power of SCHER mode is the planned active power. The historical operating data of AGC units in each control area includes: the historical actual active power regulation and the historical actual active power regulation of all AGC units in all control cycles within the set historical period; Each control cycle within the historical period is treated as a sample. The active power output of the AGC unit and the active power sensitivity coefficient of the control interval tie line are the changes in active power of the control interval tie line caused by the change in the active power output of the AGC unit.

3. The method for calculating the ACE distribution factor considering active power control strategy according to claim 2, characterized in that: Each control zone calculates its regional regulation demand power based on the regional control deviation (ACE) and the regulation characteristic parameters of the AGC units, as follows: The initial value of the regional regulation demand power in each control cycle of each control area is taken as the negative of the regional control deviation (ACE) of each control area. The difference between the target active power output of all AGC units in each control area in the previous control cycle and the current actual active power is iterated. If the difference is greater than 0, the difference is the remaining active power regulation total, and the corresponding AGC unit is the AGC unit that has not completed the active power response of the previous control cycle. The remaining active power regulation total of all AGC units that have not completed the active power response of the previous control cycle is added together to obtain the expected remaining active power regulation total. The initial value of the regional regulation demand power is subtracted from the expected remaining active power regulation total to obtain the regional active power regulation demand of each control area in each control cycle.

4. The method for calculating the ACE distribution factor considering active power control strategy according to claim 2, characterized in that: Based on the regional regulation demand power, the active power control strategy of AGC units, and the regulation characteristic parameters of AGC units, the adjustable AGC units participating in active power control and their actual active power regulation amounts are determined for each control cycle, specifically as follows: Within each control cycle, if the adjustable state of the AGC unit in the corresponding control cycle is adjustable, then the corresponding AGC unit is an adjustable AGC unit. The upper and lower limits of the active power adjustment of the adjustable AGC unit are calculated based on the adjustment characteristic parameters of the adjustable AGC unit. When the regional regulation demand power of the control area is greater than or equal to the sum of the active power regulation upper limits of all adjustable AGC units, the actual active power regulation amount issued by all adjustable AGC units is the active power regulation upper limit of the corresponding adjustable AGC unit. When the regional regulation demand power is less than or equal to the negative of the sum of the active power regulation lower limits of all adjustable AGC units, the single actual active power regulation amount issued by all adjustable AGC units is the active power regulation lower limit of the corresponding adjustable AGC unit. When the regional regulation demand power of the control area is less than the sum of the upper limit values ​​of the active power regulation of all adjustable AGC units and greater than the negative of the sum of the lower limit values ​​of the active power regulation of all adjustable AGC units, the adjustable AGC units participating in active power control in each control area and their actual active power regulation amount are determined in each control cycle according to the active power allocation strategy in the active power control strategy of the adjustable AGC units, based on the regional regulation demand power, the control mode of the adjustable AGC units, and the upper and lower limit values ​​of the active power regulation.

5. The method for calculating the ACE distribution factor considering active power control strategy according to claim 4, characterized in that: The upper and lower limits of active power regulation for adjustable AGC units are calculated based on their regulation characteristic parameters, specifically as follows: When the adjustable AGC unit is a thermal power unit, hydropower unit, or new energy unit, the upper limit of active power regulation is the product of the active power regulation ramp rate and the control cycle duration; the lower limit of active power regulation is the product of the active power regulation ramp rate and the control cycle duration. When the adjustable AGC unit is an energy storage unit, the difference between the state of charge of the adjustable AGC unit and the corresponding lower limit of SOC is multiplied by the rated capacity and then divided by the control cycle duration to obtain the upper limit of active power regulation; the difference between the corresponding upper limit of SOC and the state of charge of the adjustable AGC unit is multiplied by the rated capacity and then divided by the control cycle duration to obtain the lower limit of active power regulation. For all types of adjustable AGC units, if the calculated upper limit of active power adjustment is greater than or equal to the difference between the upper limit of active power output and the current actual active power, then the upper limit of active power adjustment will be adjusted to the difference between the upper limit of active power output and the current actual active power; otherwise, the upper limit of active power adjustment will remain unchanged. If the calculated lower limit of active power regulation is greater than or equal to the difference between the current actual active power and the lower limit of active power output, then the lower limit of active power regulation will be adjusted to the difference between the current actual active power and the lower limit of active power output; otherwise, the lower limit of active power regulation will remain unchanged.

6. The method for calculating the ACE distribution factor considering active power control strategy according to claim 4, characterized in that: Based on the active power allocation strategy in the active power control strategy of adjustable AGC units, the adjustable AGC units participating in active power control in each control zone and their actual active power adjustment amounts are determined in each control cycle, specifically as follows: If the active power allocation strategy is a proportional sharing strategy, all the adjustable AGC units are adjustable AGC units participating in active power control; obtain the proportional sharing factor of each adjustable AGC unit in the proportional sharing strategy; The initial active power regulation of each adjustable AGC unit is obtained by allocating the regional regulation demand power based on the proportional sharing factor, control mode, and upper and lower limits of active power regulation. The current active power allocation adjustment is the initial active power adjustment; The remaining regional regulation demand power is obtained by subtracting the total allocated power from the regional regulation demand power. The total allocated power is the sum of the current active power allocation regulation amounts of all adjustable AGC units. If the remaining regional regulation demand power is greater than the set minimum demand power, the remaining regional regulation demand power is allocated based on the proportional sharing factor, control mode, and upper and lower limits of active power regulation to obtain the redistributed active power regulation amount for each adjustable AGC unit. The redistributed active power allocation regulation amount is then superimposed with the current active power allocation regulation amount of the corresponding adjustable AGC unit to obtain the updated current active power allocation regulation amount. The remaining regional regulation demand power is then... The updated remaining regional regulation demand power is obtained by subtracting the total allocated power from the calculated power. If the remaining regional regulation demand power is still greater than the set minimum demand power, the above process is repeated starting from allocating the remaining regional regulation demand power based on the proportional sharing factor, control mode, and upper and lower limits of active power regulation to obtain the redistribution active power regulation amount for each adjustable AGC unit, until the remaining regional regulation demand power is less than or equal to the set minimum demand power. If the remaining regional regulation demand power is less than or equal to the set minimum demand power, the actual active power regulation amount issued to each adjustable AGC unit is the current active power allocation regulation amount. The actual active power regulation is adjusted based on the direction of the actual active power regulation and the cumulative amount of active power allocation.

7. The method for calculating the ACE distribution factor considering active power control strategy according to claim 6, characterized in that: The initial active power regulation of each adjustable AGC unit is obtained by allocating the regional regulation demand power based on the proportional sharing factor, control mode, and upper and lower limits of active power regulation. Specifically: Normalize all proportional sharing factors, for the th m The first control area c The first control cycle i For each adjustable AGC unit, the product of the regional active power regulation demand of the corresponding control area and the normalized proportional sharing factor of the corresponding adjustable AGC unit is used as the first power of the corresponding adjustable AGC unit. If the control mode of the adjustable AGC unit is AUTOR, then the initial active power regulation of the corresponding adjustable AGC unit is the first power of the corresponding adjustable AGC unit; if the control mode of the adjustable AGC unit is SCHER, then the initial active power regulation of the corresponding adjustable AGC unit is the sum of the first power, the planned active power, and the current actual active power of the corresponding adjustable AGC unit. When the initial active power regulation of the adjustable AGC unit is greater than or equal to the upper limit of the active power regulation of the corresponding adjustable AGC unit, the initial active power regulation will be adjusted to the upper limit of the active power regulation of the corresponding adjustable AGC unit. When the initial active power regulation of the adjustable AGC unit is less than or equal to the lower limit of the active power regulation of the corresponding adjustable AGC unit, the initial active power regulation will be adjusted to the lower limit of the active power regulation of the corresponding adjustable AGC unit. When the initial active power regulation of the adjustable AGC unit is greater than the lower limit of the active power regulation of the corresponding adjustable AGC unit but less than the upper limit of the active power regulation of the corresponding adjustable AGC unit, the initial active power regulation remains unchanged.

8. The method for calculating the ACE distribution factor considering active power control strategy according to claim 6, characterized in that: The actual active power regulation is adjusted based on the direction of the actual active power regulation and the cumulative active power allocation, specifically as follows: If the actual active power regulation amount issued by each adjustable AGC unit is in the same direction as the total regional regulation demand, then the actual active power regulation amount issued by the corresponding adjustable AGC unit remains unchanged. If the direction is opposite, the actual active power regulation of the corresponding adjustable AGC unit will be set to zero; Set the active power allocation accumulation and initialize it to zero. Traverse each adjustable AGC unit in ascending order of unit number. Add the current value of the active power allocation accumulation to the actual active power adjustment amount issued by the currently traversed adjustable AGC unit to obtain the superimposed value adjustment amount. If the absolute value of the superimposed adjustment is less than the preset dead zone threshold of the corresponding adjustable AGC unit, the active power allocation accumulation will be updated and the actual active power adjustment of the AGC unit will be set to zero. Otherwise, the adjustment amount after superposition will be used as the actual active power adjustment amount issued to the corresponding adjustable AGC unit and the active power allocation accumulation will be cleared to zero; after the traversal is completed, if there is still a residual active power allocation accumulation, it will be discarded.

9. The method for calculating the ACE distribution factor considering active power control strategy according to claim 4, characterized in that: Based on the active power allocation strategy in the active power control strategy of adjustable AGC units, the adjustable AGC units participating in active power control in each control zone and their actual active power adjustment amounts are determined in each control cycle, specifically as follows: If the active power allocation strategy in the active power control strategy of the adjustable AGC unit is a priority strategy, then obtain the up-adjustment and down-adjustment priorities for each adjustable AGC unit. If the regional regulation demand is an upward demand, then all adjustable AGC units in the control area will be sorted from largest to smallest according to the upward priority, and the active power regulation upper limit of all adjustable AGC units will be added up sequentially according to the sorting. If the regional regulation demand power is less than or equal to the active power regulation upper limit of the first adjustable AGC unit, then only the first adjustable AGC unit is an adjustable AGC unit participating in active power control; the actual active power regulation amount issued by the first adjustable AGC unit is the regional regulation demand power. If the regional regulation demand power is greater than the sum of the active power regulation upper limits of the first j-1 adjustable AGC units and less than or equal to the sum of the active power regulation upper limits of the first j adjustable AGC units, then the first j adjustable AGC units are all adjustable AGC units participating in active power control; and the actual active power regulation amount issued by the first j-1 adjustable AGC units is the active power regulation upper limit of the corresponding adjustable AGC unit. The actual active power regulation of the j-th adjustable AGC unit is equal to the regional regulation demand power minus the sum of the active power regulation upper limit values ​​of the first j-1 adjustable AGC units; If the regional regulation demand power is greater than the sum of the active power regulation upper limits of all adjustable AGC units, then all adjustable AGC units are adjustable AGC units participating in active power control; and the actual active power regulation amount issued by all adjustable AGC units is the corresponding active power regulation upper limit of the adjustable AGC unit.

10. The method for calculating the ACE distribution factor considering active power control strategy according to claim 8, characterized in that: If the regional regulation demand power is a downward demand, then all adjustable AGC units in the control area will be sorted from largest to smallest according to the downward priority, and the absolute values ​​of the active power regulation lower limit of all adjustable AGC units will be added together in order of sorting. If the absolute value of the regional regulation demand power is less than or equal to the absolute value of the active power regulation lower limit of the first adjustable AGC unit, then only the first adjustable AGC unit is an adjustable AGC unit participating in active power control; the actual active power regulation amount issued by the first adjustable AGC unit is the regional regulation demand power. If the absolute value of the regional regulation demand power is greater than the sum of the absolute values ​​of the active power regulation lower limits of the first j-1 adjustable AGC units and less than or equal to the sum of the absolute values ​​of the active power regulation lower limits of the first j adjustable AGC units, then the first j adjustable AGC units are all adjustable AGC units participating in active power control; and the actual active power regulation amount issued by the first j-1 adjustable AGC units is the corresponding active power regulation lower limit value of the adjustable AGC unit; subtract the sum of the absolute values ​​of the active power regulation lower limits of the first j-1 adjustable AGC units from the absolute value of the regional regulation demand power, and the negative number of the subtraction result is the actual active power regulation amount issued by the j-th adjustable AGC unit. If the absolute value of the regional regulation demand power is greater than the sum of the absolute values ​​of the active power regulation lower limits of all adjustable AGC units, then all adjustable AGC units are adjustable AGC units participating in active power control; and the actual active power regulation amount issued by all adjustable AGC units is the corresponding active power regulation lower limit of the adjustable AGC unit.

11. The method for calculating the ACE distribution factor considering active power control strategy according to claim 1, characterized in that: The quantiles of the response deviation coefficients of each adjustable AGC unit under the current operating conditions at the set confidence level are obtained using a probability distribution model. Combining the actual active power regulation issued by each adjustable AGC unit with the quantiles of the response deviation coefficients at the set confidence level, the reliable active power regulation of the adjustable AGC units participating in active power control within each control cycle is calculated, specifically: Valid samples are selected from the historical operating data of the adjustable AGC unit. When the historical actual active power regulation of the adjustable AGC unit in a sample is greater than or equal to the preset historical regulation threshold, and the historical actual active power regulation does not exceed the preset multiple threshold of the historical actual active power regulation, and the historical actual active power regulation is in the same direction as the historical actual active power regulation, the corresponding sample is considered valid; otherwise, the corresponding sample is considered invalid. Calculate the response deviation coefficient for each valid sample of each adjustable AGC unit. The response deviation coefficient is the ratio of the historical actual active power adjustment to the historical actual active power dispatch adjustment. Based on the historical operating conditions of each adjustable AGC unit, the command response deviation coefficient of the adjustable AGC unit is combined and divided into several boxes, and each box contains several samples; the operating conditions include the direction of the actual active power regulation, the actual active power before the regulation, and the range in which the actual active power regulation is located. For each chamber, the probability density function of all response deviation coefficients in the chamber is fitted using the kernel density method. The fitted probability density function is integrated to obtain the cumulative distribution function. The lower quantile of the cumulative distribution function at the set confidence level is used as the quantile of the response deviation coefficient of the corresponding chamber at the set confidence level. The quantile of the response deviation coefficient of the box corresponding to the operating condition of each adjustable AGC unit participating in active power control at the set confidence level is taken as the response deviation coefficient of the corresponding adjustable AGC unit participating in active power control. Divide the actual active power regulation amount issued by the corresponding adjustable AGC unit participating in active power control by the response deviation coefficient of the corresponding adjustable AGC unit participating in active power control to obtain the reliable active power regulation amount of the corresponding adjustable AGC unit participating in active power control.

12. The method for calculating the ACE distribution factor considering active power control strategy according to claim 2, characterized in that: Based on the adjustable AGC units participating in active power control within each control cycle, their reliable active power regulation, and the active power output-control interval tie line active power sensitivity coefficient, the ACE distribution factor for each control zone is calculated, specifically: For each control cycle within the control area, the product of the active power output of each adjustable AGC unit participating in active power control and the active power sensitivity coefficient of the control interval tie line and the reliable active power adjustment amount is calculated as the power change generated in the tie line when the corresponding adjustable AGC unit participating in active power control is adjusted. The power changes generated in the tie line during the adjustment of all adjustable AGC units involved in active power control are summed and then divided by the regional control deviation of the corresponding control area to obtain the ACE distribution factor of the corresponding control area for the corresponding control cycle.

13. An ACE distribution factor calculation system based on the method of any one of claims 1-12, considering active power control strategies, comprising: The data acquisition module, active power instruction calculation module, reliable active power regulation calculation module, and ACE distribution factor calculation module are characterized by: Data acquisition module: used to acquire the regional control deviation (ACE) of each control zone, and to acquire the active power control strategy, regulation characteristic parameters, historical operating data, and active power output-control zone tie line active power sensitivity coefficient of the AGC units in each control zone; Active power instruction calculation module: It is used to calculate the regional regulation demand power of each control zone based on the regional control deviation ACE and the regulation characteristic parameters of the AGC unit. Combining the regional regulation demand power, the active power control strategy of the AGC unit and the regulation characteristic parameters of the AGC unit, it determines the adjustable AGC unit participating in active power control and its actual active power regulation amount in each control cycle. The reliable active power regulation calculation module takes into account the response uncertainty of adjustable AGC units. Based on the historical operating data of the adjustable AGC units, it constructs a probability distribution model of the response deviation coefficient. Through the probability distribution model, it obtains the quantile of the response deviation coefficient of each adjustable AGC unit under the current operating conditions at the set confidence level. Combining the actual active power regulation issued by each adjustable AGC unit and the quantile of the response deviation coefficient at the set confidence level, it calculates the reliable active power regulation of the adjustable AGC units participating in active power control in each control cycle. ACE Distribution Factor Calculation Module: Used to calculate the ACE distribution factor of each control zone based on the adjustable AGC units participating in active power control within each control cycle, their reliable active power adjustment, and the active power output-control zone tie line active power sensitivity coefficient.

14. An ACE distribution factor calculation device considering active power control strategies, characterized in that, The device includes a processor and a memory, the memory storing computer instructions, and the processor executing the computer instructions stored in the memory. When the computer instructions are executed by the processor, the device implements the steps of the ACE distribution factor calculation method considering active power control strategy as described in any one of claims 1 to 12.

15. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the ACE distribution factor calculation method considering active power control strategies as described in any one of claims 1 to 12.

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