Automatic power generation control method and system

Abstract

The present invention discloses an automatic power generation control method and system. The method comprises: establishing a target control area, wherein the target control area includes: thermal power units and new energy stations; obtaining a first planned output power and a first actual output power of the thermal power units, as well as a second planned output power and a second actual output power of the new energy stations; and automatically controlling power generation of the thermal power units based on the first planned output power, the first actual output power, the second planned output power, and the second actual output power. The present invention addresses the technical problem of the poor ultra-high voltage direct current transmission capability of self-gain control methods in related technologies.

Description

Technical Field

[0001] The present invention relates to the field of power grid control, and in particular to an automatic power generation control method and system. Background Art

[0002] At present, the control function of the self-gain control master station meets the control requirements of conventional thermal and hydropower station units, and can achieve unified and coordinated control of various types of units for safety.

[0003] However, the increased transmission capacity of UHVDC channels has resulted in a significant increase in the proportion of DC power being fed into receiving grids, leading to a decrease in system inertia. This has resulted in a decrease in the grid's regulation capabilities. Furthermore, permanent faults such as DC blocking, resulting in large power shortages, can lead to frequency instability issues in receiving grids, directly restricting the maximum steady-state transmission capacity of AC / DC transmission projects and impacting the ability to transmit renewable energy generation.

[0004] To address the above-mentioned problems, no effective solutions have been proposed so far. Summary of the Invention

[0005] The embodiments of the present invention provide an automatic power generation control method and system to at least solve the technical problem that the self-gain control method in the related art has poor ultra-high voltage direct current transmission capability.

[0006] According to one aspect of an embodiment of the present invention, there is provided an automatic power generation control method, comprising: constructing a target control area, wherein the target control area includes: a thermal power unit and a new energy station; obtaining a first planned output power and a first actual output power of the thermal power unit, and a second planned output power and a second actual output power of the new energy station; and performing automatic power generation control on the thermal power unit based on the first planned output power, the first actual output power, the second planned output power, and the second actual output power.

[0007] Optionally, obtaining the first planned output power of the thermal power unit and the second planned output power of the new energy station includes: obtaining a DC power transmission plan, and short-term power forecast data and ultra-short-term power forecast data of the new energy station; obtaining the predicted output power of the thermal power unit based on the DC power transmission plan and the short-term power forecast data; and generating the first planned output power and the second planned output power based on the ultra-short-term power forecast data and the predicted output power of the thermal power unit.

[0008] Optionally, automatic power generation control of the thermal power unit based on the first planned output power, the first actual output power, the second planned output power and the second actual output power includes: determining the regional control deviation based on the first planned output power, the first actual output power, the second planned output power and the second actual output power; obtaining a comparison result between the linked transformer transmission power and the first preset limit; and automatically controlling the power generation of the thermal power unit based on the regional control deviation and the comparison result.

[0009] Optionally, based on the first planned output power, the first actual output power, the second planned output power and the second actual output power, determining the regional control deviation includes: obtaining a third planned output power and a third actual output power of the target DC, wherein the target DC corresponds to the target control area; determining a fourth planned output power of the target control area's external interconnection line based on the first planned output power, the second planned output power and the third planned output power; determining a fourth actual output power of the target control area's external interconnection line based on the first actual output power, the second actual output power and the third actual output power; and obtaining the difference between the fourth actual output power and the fourth planned output power to obtain the regional control deviation.

[0010] Optionally, based on the regional control deviation and the comparison result, automatic power generation control of the thermal power unit includes: determining the allocation strategy of the regional control deviation based on the comparison result; allocating the regional control deviation based on the allocation strategy to determine the first adjustment amount; and adjusting the actual output power of the thermal power unit based on the first adjustment amount.

[0011] Optionally, based on the comparison result, determining the allocation strategy of the regional control deviation includes: when the comparison result is that the linked transformer transmission power is less than the first preset limit, determining that the allocation strategy is the first allocation strategy; when the comparison result is that the difference between the linked transformer transmission power and the first preset limit is within the preset area, determining that the allocation strategy is the second allocation strategy, wherein the first adjustment amount is used to control the increase in the actual output power of the thermal power unit; when the comparison result is that the linked transformer transmission power is greater than the difference between the first preset limit, determining that the allocation strategy is the third allocation strategy.

[0012] Optionally, before adjusting the actual output power of the thermal power unit based on the first adjustment amount, the method also includes: determining the adjustment range of the thermal power unit based on the first planned output power; judging whether the first adjustment amount is within the adjustment range; if the first adjustment amount is within the adjustment range, adjusting the actual output power of the thermal power unit based on the first adjustment amount; if the first adjustment amount is not within the adjustment range, determining a second adjustment amount within the adjustment range based on the first adjustment amount, and adjusting the actual output power of the thermal power unit based on the second adjustment amount.

[0013] Optionally, before automatically controlling the power generation of the thermal power unit based on the regional control deviation and the comparison result, the method also includes: performing data filtering and dynamic dead zone filtering on the regional control deviation to obtain a filtered regional control deviation; and automatically controlling the power generation of the thermal power unit based on the filtered regional control deviation and the comparison result.

[0014] Optionally, before determining the regional control deviation based on the first planned output power, the first actual output power, the second planned output power and the second actual output power, the method also includes: performing first-order filtering on the first planned output power and the first actual output power to obtain the filtered first planned output power and the filtered first actual output power; performing median filtering on the second planned output power and the second actual output power to obtain the filtered second planned output power and the filtered second actual output power; and determining the regional control deviation based on the filtered first planned output power, the filtered first actual output power, the filtered second planned output power and the filtered second actual output power.

[0015] Optionally, after automatically controlling the power generation of the thermal power unit based on the first planned output power, the first actual output power, the second planned output power and the second actual output power, the method also includes: obtaining the total trading power of the target section in a preset time period, wherein the new energy station is located under the target section, and the total trading power is the sum of the trading power of all stations under the target section in the preset time period; comparing the total trading power with the second preset limit to obtain a first verification result of the target section; determining the target output power of the new energy station based on the first verification result; and sending the target output power to the new energy station.

[0016] Optionally, based on the first verification result, determining the target output power of the new energy station includes: when the first verification result is that the total trading power exceeds the second preset limit, lowering the trading power of the new energy station to obtain the target output power; when the first verification result is that the total trading power does not exceed the second preset limit, obtaining the difference between the total output power and the total trading power of the target section, processing the difference according to a first preset ratio to obtain the target power corresponding to the new energy station, and obtaining the target output power based on the target power.

[0017] Optionally, based on the target power, obtaining the target output power includes: judging whether the new energy station is the target station; if the new energy station is the target station, determining the target output power as the sum of the trading power and the target power of the new energy station; if the new energy station is not the target station, determining the target output power as the target power.

[0018] Optionally, before sending the target output power to the new energy station, the method also includes: determining the current state of the target section; when the current state is normal, sending the target output power or the first output power to the new energy station, wherein the first output power is greater than the target output power; when the current state is a jump, sending the target output power to the new energy station; when the current state is a pause, prohibiting sending the target output power to the new energy station; when the current state is an emergency, if the target output power is greater than the product of the second actual output power of the new energy station and a preset value, sending the sum of the second actual output power and the product to the new energy station, wherein, if the current state is still an emergency in the next control cycle, sending the minimum output power of the target output power and the second actual output power to the new energy station.

[0019] Optionally, when the first verification result is that the total traded power does not exceed the second preset limit, the method also includes: obtaining the total spot power of the target section, wherein the total spot power is the sum of the spot power of all stations under the target section; comparing the total spot power with the third preset limit to obtain a second verification result of the target section; and determining the target output power based on the second verification result.

[0020] Optionally, based on the second verification result, determining the target output power includes: when the second verification result is that the total spot power exceeds a third preset limit, lowering the spot power of the new energy station to obtain the target output power; when the second verification result is that the total spot power does not exceed the third preset limit, obtaining the difference between the total output power and the total spot power of the target section, processing the difference according to a second preset ratio to obtain the shared power corresponding to the new energy station, and obtaining the target output power based on the shared power.

[0021] Optionally, based on the shared power, obtaining the target output power includes: determining whether the new energy station is the target station; if the new energy station is the target station, determining the target output power as the sum of the trading power, spot power and shared power of the new energy station within a preset time period; if the new energy station is not the target station, determining the target output power as the shared power.

[0022] Optionally, after automatically controlling the power generation of the thermal power unit based on the first planned output power, the first actual output power, the second planned output power and the second actual output power, the method further includes: obtaining the energy storage power station corresponding to the new energy station; detecting whether there is a power restriction at the new energy station; if there is a power restriction at the new energy station, determining the charging power of the energy storage power station based on the limited power of the new energy station.

[0023] Optionally, determining the charging power of the energy storage power station based on the restricted power of the new energy station includes: when the new energy station and the energy storage power station are in a one-to-one relationship, determining the charging power as the restricted power; when the new energy station and the energy storage power station are in a many-to-one relationship, obtaining the total restricted power of the energy storage power station, and determining the charging power as the target restricted power in the total restricted power based on the capacity of the new energy station, wherein the total restricted power is the sum of the restricted powers of multiple new energy stations corresponding to the energy storage power station.

[0024] Optionally, after determining that the charging power is the target restricted power in the total restricted power, the charging power of the energy storage power station is adjusted based on the regulation rate of the new energy station.

[0025] Optionally, when the energy storage power station reaches the discharge time period, the method further includes: determining whether there is an upward regulation demand in the power grid; if there is an upward regulation demand in the power grid, determining the discharge power of each of the multiple energy storage power stations based on the upward regulation demand; determining whether the maximum discharge power of the multiple energy storage power stations meets the upward regulation demand; if the maximum discharge power does not meet the upward regulation demand, obtaining the difference between the upward regulation demand and the maximum discharge power to obtain the residual regulation demand; and controlling the actual output power of the thermal power unit to increase based on the residual regulation demand.

[0026] Optionally, after automatically controlling the power generation of the thermal power unit based on the first planned output power, the first actual output power, the second planned output power and the second actual output power, the method also includes: determining whether the load rate of the thermal power unit and the new energy station is within a preset load range; if the load rate is within the preset load range, automatically controlling the power generation of the thermal power unit according to a preset adjustment quantity allocation mode.

[0027] According to another aspect of an embodiment of the present invention, an automatic power generation control system is also provided, including: a thermal power unit and a new energy station, located in a constructed target control area; a control master station, which is connected to the thermal power unit and the new energy station, and is used to automatically control the power generation of the thermal power unit based on the first planned output power and the first actual output power of the thermal power unit, and the second planned output power and the second actual output power of the new energy station.

[0028] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is provided. The computer-readable storage medium includes a stored program, wherein when the program runs, the device where the computer-readable storage medium is located is controlled to execute the above-mentioned automatic power generation control method.

[0029] According to another aspect of an embodiment of the present invention, a processor is further provided. The processor is configured to run a program, wherein the program executes the above-mentioned automatic power generation control method when running.

[0030] In an embodiment of the present invention, after establishing a target control area, automatic power generation control can be performed on the thermal power units based on the first planned output power and first actual output power of the thermal power units, as well as the second planned output power and second actual output power of the new energy station, thereby achieving coordinated control of wind, solar, and thermal power bundles. Compared with related technologies, by adding a DC virtual control area and controlling DC channel safety as the goal, the technical effects of improving the level of intelligent scheduling automation, enhancing the ability to absorb new energy, reducing the overall power generation cost of the power grid, reducing power grid fluctuations, and improving power grid security and stability are achieved. This solves the technical problem of the self-gain control method in related technologies, which has a poor performance in ultra-high voltage direct current transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0032] Figure 1 is a flow chart of an automatic power generation control method according to an embodiment of the present invention;

[0033] Figure 2 is a schematic diagram of an optional DC virtual control area according to an embodiment of the present invention;

[0034] Figure 3 is a flow chart of an optional automatic power generation control method according to an embodiment of the present invention;

[0035] Figure 4 is a schematic diagram of an optional adjustment range of a unit in a planned bandwidth limitation mode according to an embodiment of the present invention;

[0036] Figure 5 is a schematic diagram of filtering effects of different optional filtering algorithms according to an embodiment of the present invention;

[0037] Figure 6 is a schematic diagram of various links of an optional medium- and long-term new energy transaction according to an embodiment of the present invention;

[0038] Figure 7 is a flow chart of an optional transaction data rationality check according to an embodiment of the present invention;

[0039] Figure 8 This is a flow chart of various steps of an optional new energy spot transaction according to an embodiment of the present invention;

[0040] Figure 9 is a flow chart of an optional charging strategy for an energy storage power station according to an embodiment of the present invention;

[0041] Figure 10is a flow chart of an optional discharging strategy of an energy storage power station according to an embodiment of the present invention;

[0042] Figure 11 This is a flow chart of an optional thermal power deep peak regulation strategy according to an embodiment of the present invention;

[0043] Figure 12 Schematic diagram of an automatic power generation control system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0044] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0045] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0046] Example 1

[0047] According to an embodiment of the present invention, an automatic power generation control method is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0048] Figure 1 is a flow chart of an automatic power generation control method according to an embodiment of the present invention. Figure 1 As shown, the method includes the following steps:

[0049] Step S102: constructing a target control area, wherein the target control area includes: thermal power units and new energy stations.

[0050] The above-mentioned thermal power units may be thermal power generating units, and the new energy stations may include: wind power generating units and photovoltaic power generating units, but are not limited thereto.

[0051] In an optional embodiment, according to the actual needs of DC wind, solar and thermal bundling and transmission, an independent virtual control area can be established for DC supporting thermal power and supporting new energy, namely the above-mentioned target control area, and a new DC virtual control area control function can be added.

[0052] Step S104: obtaining a first planned output power and a first actual output power of the thermal power unit, and a second planned output power and a second actual output power of the new energy station.

[0053] In an optional embodiment, the daily rolling power generation plan of the thermal power units and the new energy stations may be determined based on the power generation plan model.

[0054] Step S106 : Automatically controlling power generation of the thermal power unit based on the first planned output power, the first actual output power, the second planned output power, and the second actual output power.

[0055] In an optional embodiment, wind, solar and thermal bundling coordinated control can be achieved based on the power generation plan and actual output power to ensure safe and stable operation of DC.

[0056] Through the above-described embodiments of the present invention, after establishing the target control area, automatic power generation control can be performed on the thermal power units based on the first planned output power and first actual output power of the thermal power units, as well as the second planned output power and second actual output power of the new energy station, thereby achieving the purpose of coordinated control of wind, solar and thermal power bundles. Compared with related technologies, by adding a DC virtual control area and controlling the DC channel safety as the goal, the technical effects of improving the level of intelligent scheduling automation, enhancing the capacity to absorb new energy, reducing the overall power generation cost of the power grid, reducing power grid fluctuations, and improving the safety and stability of the power grid are achieved. This solves the technical problem of the self-gain control method in related technologies that has poor UHVDC transmission capacity.

[0057] Optionally, in the above embodiment of the present invention, obtaining the first planned output power of the thermal power unit and the second planned output power of the new energy station includes: obtaining a DC power transmission plan, and short-term power forecast data and ultra-short-term power forecast data of the new energy station; obtaining the predicted output power of the thermal power unit based on the DC power transmission plan and the short-term power forecast data; and generating the first planned output power and the second planned output power based on the ultra-short-term power forecast data and the predicted output power of the thermal power unit.

[0058] In an optional embodiment, as Figure 2 and Figure 3As shown, the power generation planning model uses the DC power transmission plan and the matching wind and solar short-term power preset data to derive the matching thermal power unit day-ahead plan (i.e., the preset output power mentioned above). Then, based on the ultra-short-term power forecast data and the thermal power unit's day-ahead plan, it forms the intraday rolling plan for the thermal power unit and the renewable energy station (i.e., the first planned output power and the second planned output power mentioned above). Based on the intraday rolling plans of the thermal power unit and the renewable energy station, as well as the actual output power of the renewable energy station, the AGC (Automatic Generation Control) calls on the thermal power unit to eliminate the power deviation of the renewable energy station. Ultimately, based on the multi-time-scale coordination of the day-ahead and intraday rolling power generation plans with the AGC, the coordinated control of the wind, solar, and thermal bundle is achieved in a sequential manner.

[0059] Optionally, in the above embodiment of the present invention, automatic power generation control of the thermal power unit based on the first planned output power, the first actual output power, the second planned output power and the second actual output power includes: determining the regional control deviation based on the first planned output power, the first actual output power, the second planned output power and the second actual output power; obtaining a comparison result between the linked transformer transmission power and the first preset limit; and automatically controlling the power generation of the thermal power unit based on the regional control deviation and the comparison result.

[0060] It should be noted that, based on the grid structure characteristics of the DC virtual control area and from the perspective of grid power flow, after the DC transmission plan is determined, the sum of the transmission power of the interconnected transformer and the total output power of the supporting thermal power units is fixed. Therefore, it is only necessary to limit the total output power of the supporting thermal power units to ensure that the transmission power of the interconnected transformer at the converter station does not exceed the stability limit.

[0061] In an optional embodiment, the control objective of the DC virtual control area is to offset the power output fluctuations of the supporting wind power base by adjusting the power output of the thermal power units, thereby ensuring the safety and stability of the DC transmission channel. Therefore, the DC virtual control area can use regional deviation control and safety constraint control to realize the wind, solar and thermal bundled transmission function. Among them, the regional deviation control mode can adopt the flat tie-line load control (FTC) mode. In this mode, the regional control deviation of the control area can be determined by the actual output power and the planned output power; the safety constraint control strategy can be determined by comparing the transmission power of the interconnected transformer with the stability limit.

[0062] Optionally, in the above embodiment of the present invention, determining the regional control deviation based on the first planned output power, the first actual output power, the second planned output power and the second actual output power includes: obtaining the third planned output power and the third actual output power of the target DC, wherein the target DC corresponds to the target control area; determining the fourth planned output power of the external interconnection line of the target control area based on the first planned output power, the second planned output power and the third planned output power; determining the fourth actual output power of the external interconnection line of the target control area based on the first actual output power, the second actual output power and the third actual output power; obtaining the difference between the fourth actual output power and the fourth planned output power to obtain the regional control deviation.

[0063] In an optional embodiment, based on the above division of the boundary of the DC virtual control area, the fourth actual output power can be calculated using the following formula:

[0064] I real =∑P Gi +P DC +∑P i-wind ,

[0065] Among them, P Gi is the first actual output power of the thermal power unit, P DC The third actual output power of the target DC, P i-wind The second actual output power of the new energy station;

[0066] The output power of the fourth plan can be calculated using the following formula:

[0067] I schedule =∑I Gi-schedule +I DC-schedule +∑I i-wind-schedule ,

[0068] Among them, I Gi-schedule is the first planned output power of the thermal power unit, I DC-schedule The third planned output power of the target DC, I wind-schedule The second planned output power for the new energy station;

[0069] The regional control deviation ACE can be calculated using the following formula: tz :

[0070] ACE tz =I real -I schedule =∑P Gi +P DC +∑P i-wind -∑I Gi-schedule -I DC-schedule -∑I i-wind-schedule

[0071] =∑P Gi -∑I Gi-schedule +P DC -I DC-schedule +∑P i-wind -∑I i-wind-schedule .

[0072] Optionally, in the above embodiment of the present invention, automatic power generation control of the thermal power unit based on the regional control deviation and the comparison result includes: determining the allocation strategy of the regional control deviation based on the comparison result; allocating the regional control deviation based on the allocation strategy to determine the first adjustment amount; and adjusting the actual output power of the thermal power unit based on the first adjustment amount.

[0073] Optionally, based on the comparison result, determining the allocation strategy of the regional control deviation includes: when the comparison result is that the linked transformer transmission power is less than the first preset limit, determining that the allocation strategy is the first allocation strategy; when the comparison result is that the difference between the linked transformer transmission power and the first preset limit is within the preset area, determining that the allocation strategy is the second allocation strategy, wherein the first adjustment amount is used to control the increase in the actual output power of the thermal power unit; when the comparison result is that the linked transformer transmission power is greater than the difference between the first preset limit, determining that the allocation strategy is the third allocation strategy.

[0074] The first preset limit mentioned above can be the rated limit corresponding to the transmission power of the joint transformer, which can be determined based on actual needs. The first allocation strategy can be a strategy that adjusts the first actual output of the supporting thermal power units to track the output power fluctuations of the new energy station. The second allocation strategy can be a strategy that prohibits the thermal power units from reducing their output power but increases their output power. The third allocation strategy can be a strategy that prioritizes the actual adjustment rate.

[0075] In an optional embodiment, when the transmission power of the joint transformer is less than the stability limit, the fluctuation of the second actual output power of the new energy station is tracked by adjusting the first actual output power of the supporting thermal power unit; when the transmission power of the joint transformer is close to the stability limit, the supporting thermal power unit is prohibited from further reducing the first actual output power, but increasing the power direction is allowed; when the transmission power of the joint transformer exceeds the stability limit, the regional control deviation of the virtual control area is the transmission power exceeding the limit of the joint transformer, and the allocation strategy of the control deviation can adopt the actual adjustment rate priority strategy to increase the output power of the thermal power unit as soon as possible, eliminate the stability limit, and ensure the safe operation of the joint transformer.

[0076] Optionally, in the above embodiment of the present invention, before adjusting the actual output power of the thermal power unit based on the first adjustment amount, the method also includes: determining the adjustment range of the thermal power unit based on the first planned output power; judging whether the first adjustment amount is within the adjustment range; if the first adjustment amount is within the adjustment range, adjusting the actual output power of the thermal power unit based on the first adjustment amount; if the first adjustment amount is not within the adjustment range, determining a second adjustment amount within the adjustment range based on the first adjustment amount, and adjusting the actual output power of the thermal power unit based on the second adjustment amount.

[0077] It should be noted that for automatic control of thermal power unit output power, conventional AGC offers a variety of manual and automatic control modes to accommodate diverse control requirements and applications. As previously mentioned, the overall control strategy for the DC virtual control area progresses from prediction to planning, and finally to plan-based real-time control. In conventional automatic mode, the unit's control target is independent of the power generation plan. The unit adjusts within its rated regulation range based on its assigned regulation power. After a period of operation, the unit's actual output power may deviate from the power generation plan. If the unit is controlled in planned mode, the unit will deviate from the plan when the network-wide ACE requires adjustment, and return to the planned value when no adjustment is required. This will result in cyclical adjustments of the unit. If multiple units return to the planned value simultaneously, this may create new impacts on the control area.

[0078] In an optional embodiment, the control mode of the thermal power unit in the DC virtual control area should adopt the planned bandwidth mode, which is a special automatic control mode. In this mode, the control target of the unit is still the control deviation of the area, but the adjustment range of the unit is dynamically changing, which is different from the conventional automatic control mode in which the adjustment range is the rated adjustment range of the unit. The adjustment range of the planned bandwidth mode is based on the power generation plan of the unit, and a certain bandwidth is expanded up and down. The bandwidth size can be expanded as needed. The planned value is combined with the bandwidth to form a planned value adjustment band, which serves as the real-time adjustment range of the unit in the planned bandwidth mode. Therefore, the adjustment range of the unit in the planned bandwidth mode changes with the change of the plan, such as Figure 4 As shown. Under normal circumstances, the unit can only adjust up and down within this planned value adjustment band. By adjusting within this adjustment band, the unit can adjust the regional control deviation without deviating too far from the planned value. When the unit's planned value is invalid, the unit's inherent adjustment range is restored.

[0079] The adjustment band generation method is as follows: Assuming the power generation plan is P b , the upper limit of the unit adjustment is P max , the lower limit of the unit adjustment is P min , the bandwidth is w, and the upper limit of the adjustment band is B max , the lower limit of the adjustment band is B min. The adjustment band boundary is:

[0080] B max =P b +w,

[0081] B min =P b -w,

[0082] At the same time, corrections should be made according to the following conditions:

[0083] When P b +w>P max , B max =P max ,

[0084] When P b -w<P min , B min =P min ,

[0085] The adjustment range of the computer unit is calculated by the above method, and the unit can be adjusted freely within this adjustment range without returning to the planned value after adjusting ACE.

[0086] Optionally, in the above embodiment of the present invention, before automatically controlling the power generation of the thermal power unit based on the regional control deviation and the comparison result, the method also includes: performing data filtering and dynamic dead zone filtering on the regional control deviation to obtain a filtered regional control deviation; and automatically controlling the power generation of the thermal power unit based on the filtered regional control deviation and the comparison result.

[0087] In an optional embodiment, as Figure 3 As shown in Figure 1, the DC control area AGC periodically obtains the total output power of thermal power units, new energy stations and the actual output power of DC transmission lines. Different filtering strategies can be used according to different output power characteristics. Among them, data filtering is performed on the regional control deviation (such as Figure 3 ACE filter shown in the figure) and dynamic dead zone filter to obtain the final control adjustment amount, which is then distributed through the strategy to obtain the control target of each thermal power unit (such as Figure 3 The target output power of the unit is shown in FIG), and the control target is sent to the thermal power plant for control.

[0088] Optionally, in the above embodiment of the present invention, before determining the regional control deviation based on the first planned output power, the first actual output power, the second planned output power and the second actual output power, the method also includes: performing first-order filtering on the first planned output power and the first actual output power to obtain the filtered first planned output power and the filtered first actual output power; performing median filtering on the second planned output power and the second actual output power to obtain the filtered second planned output power and the filtered second actual output power; determining the regional control deviation based on the filtered first planned output power, the filtered first actual output power, the filtered second planned output power and the filtered second actual output power.

[0089] In an optional embodiment, as Figure 3 As shown, DC flow measurement is generally considered to have stable data and does not require filtering (e.g. Figure 3 The measured data is filtered as shown in the figure. Thermal power units have relatively small output power fluctuations, so first-order filtering can meet control requirements. New energy stations have relatively large output power fluctuations, so median filtering can be used, which has a deeper filtering depth and removes high-frequency components. The corresponding power generation plan is then subtracted from the filtered value to obtain the regional control deviation for the virtual control area.

[0090] It should be noted that due to the relatively slow adjustment rate of thermal power units, filtering of renewable energy station measurement data and regional control deviations is necessary to prevent frequent and repetitive adjustments caused by random fluctuations in renewable energy power. The main filtering methods include: Users can select the filter depth as needed, and the filtering effect varies with the filter depth. The higher the filter depth, the better the filtering effect. However, increasing the filter depth also increases the filter delay. Conventional digital filtering methods include first-order filtering, second-order filtering, and median filtering.

[0091] Among them, the first-order low-pass filtering algorithm is generally expressed by a first-order linear differential equation:

[0092] XFIL(K+1)=XFIL(K)+[XRAW(K+1)-XFIL(K)]*DTF,

[0093] The transfer function of a second-order low-pass filter is defined as:

[0094]

[0095] Median filtering is a nonlinear smoothing technology. The basic principle is to replace the value of a point in a digital sequence with the median of the values ​​of all points in a neighborhood of that point, so that the surrounding values ​​are close to the true value, thereby eliminating isolated noise points.

[0096] Based on the above scheme, different filtering algorithms can be used to filter the regional control deviation of the power grid. The effect after filtering is as follows: Figure 5 shown.

[0097] Optionally, in the above embodiment of the present invention, after automatically controlling the power generation of the thermal power unit based on the first planned output power, the first actual output power, the second planned output power and the second actual output power, the method further includes: obtaining the total trading power of the target section in a preset time period, wherein the new energy station is located under the target section, and the total trading power is the sum of the trading power of all stations under the target section in the preset time period; comparing the total trading power with the second preset limit to obtain a first verification result of the target section; determining the target output power of the new energy station based on the first verification result; and sending the target output power to the new energy station.

[0098] The above-mentioned preset time period can be a medium- to long-term time period and can be determined according to actual needs. The second preset limit can be a section rating limit set in a medium- to long-term transaction and can be determined according to actual needs.

[0099] In an optional embodiment, the new energy AGC automatically receives medium- and long-term transaction power, and under the premise of ensuring the safety of nested sections at all levels, gives priority to ensuring the accurate execution of medium- and long-term transactions and realizes the fair distribution of the remaining absorption space among all power plants. After calculating the target of each station, after a series of checks such as step length check and section safety check, reasonable instructions are formed and issued to each new energy station for execution. Figure 6 As shown, medium- and long-term transactions of new energy include transaction preprocessing, nested section control, and safety lock verification.

[0100] The medium and long-term market provides a trading plan. After receiving the planned trading power, the new energy AGC will give priority to ensuring the execution of medium and long-term transactions under the condition of section safety. If the transaction causes the section to exceed the limit, the actual trading power of each station should be scaled according to the proportion of trading power. Figure 7 As shown, the medium- and long-term trading power of each station can be obtained in real time from the trading module, and the total medium- and long-term trading power of the relevant stations participating in the target section can be calculated. It is determined whether the medium- and long-term total trading power causes the section to exceed the limit, that is, whether the medium- and long-term total trading power exceeds the second preset limit, to obtain a first verification result. The medium- and long-term trading power of each station (i.e., the target output power mentioned above) is further determined based on the first verification result, and the output power of each station is further controlled based on the medium- and long-term trading power.

[0101] Optionally, in the above embodiment of the present invention, determining the target output power of the new energy station based on the first verification result includes: when the first verification result is that the total trading power exceeds the second preset limit, lowering the trading power of the new energy station to obtain the target output power; when the first verification result is that the total trading power does not exceed the second preset limit, obtaining the difference between the total output power and the total trading power of the target section, processing the difference according to the first preset ratio to obtain the target power corresponding to the new energy station, and obtaining the target output power based on the target power.

[0102] In an optional embodiment, as Figure 7 As shown, in order to avoid excessive trading power, which may cause the section to exceed the limit, AGC will conduct a security check on the trading data to check whether the trading power of the new energy station under each section will cause the section to exceed the limit. If there is a risk of exceeding the limit, the trading power will be proportionally reduced according to the section acceptance capacity to ensure the safety of the section and the fairness of the transaction execution. If there is no risk of the trading power exceeding the limit, when allocating power in the section, the total target power of the section (that is, the total output power mentioned above) will be subtracted from the sum of the trading power of the stations under the section (that is, the total trading power mentioned above), and then the remaining indicators will be proportionally allocated to all stations participating in the section regulation (including stations with trading power). After the allocation, the target output power can be obtained to ensure that when allocating power in the section, the station will be given priority to be allocated trading power.

[0103] Optionally, in the above embodiment of the present invention, obtaining the target output power based on the target power includes: judging whether the new energy station is the target station; if the new energy station is the target station, determining the target output power as the sum of the trading power and the target power of the new energy station; if the new energy station is not the target station, determining the target output power as the target power.

[0104] The target site mentioned above may refer to a site participating in the transaction, that is, a site with traded electricity.

[0105] In an optional real-time, after the allocation is completed, the target output power of the station without traded power is the target value, and the target output power of the station with traded power is the target value plus the traded power.

[0106] Optionally, in the above embodiment of the present invention, before sending the target output power to the new energy station, the method also includes: determining the current state of the target section; when the current state is normal, sending the target output power or the first output power to the new energy station, wherein the first output power is greater than the target output power; when the current state is a jump, sending the target output power to the new energy station; when the current state is paused, prohibiting sending the target output power to the new energy station; when the current state is emergency, if the target output power is greater than the product of the second actual output power of the new energy station and the preset value, then sending the sum of the second actual output power and the product to the new energy station, wherein, if the current state is still emergency in the next control cycle, sending the minimum output power of the target output power and the second actual output power to the new energy station.

[0107] The above-mentioned preset value may be a preset fixed step length, for example, a 1 / 4 step length, but is not limited thereto.

[0108] In an optional embodiment, as Figure 6 As shown, for the safety interlock control link, considering the lag and accuracy of instruction execution at each station under the section, which may lead to under-adjustment or over-adjustment, a last safety interlock defense line needs to be set before the instruction exit.

[0109] If the current state of the section is normal, that is, the section is in the normal zone or the help zone, then considering that there is sufficient space in the section, it is guaranteed that there will be no instructions to reduce the output power of each station. Therefore, the output power sent to the new energy station can be the target output power, in which case the output power of each station remains unchanged, or the first output power, in which case the output power of each station increases.

[0110] If the current state of the section is jump, that is, the section jumps, all real-time power stations issue current output power instructions, and therefore, send the target output power to the new energy station;

[0111] If the current status of the section is paused, that is, the section is paused, all stations will not send instructions, and therefore, it is prohibited to send the target output power to the new energy station;

[0112] If the current status of the section is emergency, that is, the more urgent the section is, the more urgent the limit adjustment is, and it is determined whether the target output power is higher than the second actual output power. Taking into account that the output power of each station is generally lower than the instruction, in order to avoid over-adjustment, in the current control cycle, if the target output power is higher than 1 / 4 step of the second actual output power, the instruction is issued according to the second actual output power + 1 / 4 step of the second actual output power (the target output power is not issued to avoid large-scale reduction of the station, and eventually the waveform oscillation of the section output power occurs). If the section is still above the emergency limit in the next control cycle, the instruction value is the smaller value between the target output power and the second actual output power, so that the section can recover quickly.

[0113] Optionally, in the above embodiment of the present invention, when the first verification result is that the total trading power does not exceed the second preset limit, the method also includes: obtaining the total spot power of the target section, wherein the total spot power is the sum of the spot power of all stations under the target section; comparing the total spot power with the third preset limit to obtain a second verification result of the target section; and determining the target output power based on the second verification result.

[0114] The third preset limit mentioned above may be the cross-sectional rated limit set in spot trading, and may be determined according to actual needs.

[0115] The new energy AGC automatically receives the day-ahead and day-ahead spot power from each station as determined by the spot market, superimposes the two as the total spot power, and pre-allocates the spot portion as a floor when allocating sections. This ensures the safety of sections while achieving the completion of spot power and fair distribution among stations. At the same time, the new energy AGC module receives the reward and penalty coefficient file (the calculation rules of the coefficient are formulated by the Planning Department) from the spot trading module in real time and automatically parses and stores it in the database. Based on the reward and penalty coefficients of each station, the AGC guides the allocation of new energy output power across the entire network. It allocates new energy output power across the entire network according to the ratio of reward and penalty coefficient * maximum capacity (maximum capacity is between 0 and installed capacity), ensuring the smooth execution of spot transactions.

[0116] While judging the status of the new energy section, the output power of each new energy section will be allocated. When AGC allocates output power to new energy stations, it must ensure that the output power target values ​​of new energy stations participating in self-owned power plant replacement transactions, inter-provincial transactions, direct power purchase and other transactions are given priority allocation.

[0117] In an optional embodiment, as Figure 8As shown, if the medium- and long-term traded power does not cause the section to cross, the real-time spot power of each station is obtained from the trading module in real time. The total real-time spot power of the relevant stations participating in the target section is calculated. Then, a determination is made as to whether the total real-time spot power causes the section to cross the line. In other words, the difference between the total spot power and the third preset limit is determined to obtain a second verification result. Based on the second verification result, the target output power of each station is further determined, and the output power of each station is further controlled based on the medium- and long-term traded power.

[0118] Optionally, in the above embodiment of the present invention, determining the target output power based on the second verification result includes: when the second verification result is that the total spot power exceeds the third preset limit, lowering the spot power of the new energy station to obtain the target output power; when the second verification result is that the total spot power does not exceed the third preset limit, obtaining the difference between the total output power and the total spot power of the target section, processing the difference according to the second preset ratio to obtain the shared power corresponding to the new energy station, and obtaining the target output power based on the shared power.

[0119] The second preset ratio may be a coefficient ratio, but is not limited thereto, and may be determined according to real-time requirements.

[0120] In an optional embodiment, as Figure 8 As shown, if the total spot power exceeds the third preset limit, it is determined that the total spot power has caused the section to exceed the limit. The real-time spot power of each station can be proportionally reduced based on the section's acceptance capacity to ensure section safety. If the total spot power does not exceed the third preset limit, the remaining section space after the transaction is executed can be calculated. The remaining section space consists of: total target power minus total spot power. The remaining space is distributed to all stations according to the coefficient ratio to obtain the shared power. The target output power is further obtained based on the shared power.

[0121] Optionally, in the above embodiment of the present invention, obtaining the target output power based on the shared power includes: judging whether the new energy station is the target station; if the new energy station is the target station, determining the target output power as the sum of the trading power, spot power and shared power of the new energy station within a preset time period; if the new energy station is not the target station, determining the target output power as the shared power.

[0122] The target site mentioned above may be a site participating in power trading.

[0123] In an optional embodiment, as Figure 8 As shown, for stations participating in the transaction, the target output power is the medium- and long-term transaction power + real-time spot power + section-shared power; for stations not participating in the transaction, the target output power is the section-shared power.

[0124] Optionally, in the above embodiment of the present invention, after automatically controlling the power generation of the thermal power unit based on the first planned output power, the first actual output power, the second planned output power and the second actual output power, the method further includes: obtaining the energy storage power station corresponding to the new energy station; detecting whether there is a power restriction situation at the new energy station; if there is a power restriction situation at the new energy station, determining the charging power of the energy storage power station based on the limited power of the new energy station.

[0125] In an optional embodiment, for the charging strategy, such as Figure 9 As shown, a storage charging time period can be set (the start and end times of this time period can be modified or received from other modules). During this time period, the start of storage charging is controlled by the AGC. Discharge cannot occur from the start of charging until it is fully charged. The charging process can be interrupted and charged in multiple time periods. The additional power generation of new energy power stations participating in the auxiliary market is automatically counted.

[0126] The specific control strategy is divided into the following main processes: the auxiliary market ranks and matches the new energy power stations participating in the energy storage auxiliary market based on the bidding of new energy power stations the day before, and transmits the pairing relationship between new energy power stations and energy storage power stations to the AGC; based on the pairing relationship between new energy power stations and energy storage power stations, the AGC scans in real time to see if there are power restrictions at power stations. If there are power restrictions, the restricted power ΔGi of the power station is calculated. If multiple new energy sites correspond to the same energy storage power station, the total restricted power ΔG is accumulated; the charging power of the energy storage power station can be determined based on the restricted power ΔGi or the total restricted power ΔG.

[0127] Optionally, in the above embodiment of the present invention, determining the charging power of the energy storage power station based on the restricted power of the new energy station includes: when the new energy station and the energy storage power station are in a one-to-one relationship, determining the charging power as the restricted power; when the new energy station and the energy storage power station are in a many-to-one relationship, obtaining the total restricted power of the energy storage power station, and determining the charging power as the target restricted power within the total restricted power based on the capacity of the new energy station, wherein the total restricted power is the sum of the restricted powers of multiple new energy stations corresponding to the energy storage power station.

[0128] In an optional embodiment, as Figure 9 As shown, in the "1-to-1" mode between new energy stations and energy storage power stations, the charging power of the energy storage power station is equal to the power limit of the paired new energy station; in the "many-to-1" mode between new energy stations and energy storage power stations, the charging power is allocated to each energy storage station in proportion to the capacity of the new energy station, and the fully charged energy storage station is no longer included in the calculation.

[0129] Optionally, in the above embodiment of the present invention, after determining that the charging power is the target restricted power in the total restricted power, the charging power of the energy storage power station is adjusted based on the regulation rate of the new energy station.

[0130] In an optional embodiment, as Figure 9 As shown, in order to avoid the impact of rapid changes in the charging power of energy storage power stations on the power grid, it is necessary to adjust the charging power of energy storage in real time according to the increase rate of new energy power stations participating in the auxiliary market, so that the charging power of the energy storage power station is consistent with the increased power of the corresponding new energy power station, ensuring the smooth operation of the power grid.

[0131] Optionally, in the above embodiment of the present invention, when the energy storage power station reaches the discharge time period, the method further includes: determining whether there is an upward regulation demand in the power grid; if there is an upward regulation demand in the power grid, determining the discharge power of each of the multiple energy storage power stations based on the upward regulation demand; determining whether the maximum discharge power of the multiple energy storage power stations meets the upward regulation demand; if the maximum discharge power does not meet the upward regulation demand, obtaining the difference between the upward regulation demand and the maximum discharge power to obtain the residual regulation demand; and controlling the actual output power of the thermal power unit to increase based on the residual regulation demand.

[0132] In an optional embodiment, for the discharge strategy, such as Figure 10 As shown, during the non-energy storage charging period, if the grid demands an increase in power, energy storage is prioritized for discharge, with grid regulation demand distributed in proportion to the rated discharge power of the energy storage power stations. If all energy storage power stations reach their maximum discharge power and still cannot meet grid demand, the output power of the hydro-thermal units is increased until energy storage discharge is complete. If the grid does not demand an increase in power, the energy storage power stations maintain their current charge, i.e., the charge and discharge power is set to zero.

[0133] Optionally, in the above embodiment of the present invention, after automatically controlling the power generation of the thermal power unit based on the first planned output power, the first actual output power, the second planned output power and the second actual output power, the method further includes: determining whether the load rate of the thermal power unit and the new energy station is within a preset load range; if the load rate is within the preset load range, automatically controlling the power generation of the thermal power unit according to a preset adjustment quantity allocation mode.

[0134] The above preset compliance range may be 50% to 55%, and may be set according to actual conditions.

[0135] In an optional embodiment, when the load rate of all units is between 55% and 50%, deep peak shaving can be enabled. The lower the subsidy quotation, the higher the peak shaving priority. The quotation ranking table is organized into a quotation interval table. Power plants with the same quotation are in the same ranking interval. When adjusting, the principle of lower quotation interval, higher priority is adopted to ensure the lowest peak shaving cost. When allocating the adjustment amount, quotation ranking allocation or proportional allocation can be adopted:

[0136] The quotation ranking and allocation method is a mode in which the quotation order is from the first to the lowest output power;

[0137] The proportional allocation method is to use various methods such as quotation ratio, capacity ratio, and standby ratio to allocate adjustment quantities to all units.

[0138] like Figure 11 As shown in the figure, for the case of reducing output power, the adjustment gear can be determined. Usually, there are two types of unit quotes: 50% to 40% and 40% to the minimum. Assume that there are N gears for auxiliary service quotes, that is, all units are divided into N levels according to their quotes, and each unit's level is Ri. Calculate the lower reserve of each unit in turn:

[0139] E down，i =P i -P min，i ,

[0140] Cumulative reserve for each gear:

[0141] P down，i =∑E down，i =∑(P i -P min，i ),

[0142] Assume that the total regional regulation demand is P reg，总 (Assuming the value is negative, adjust downward), accumulate the total downward adjustment in sequence according to the gear until the following conditions are met:

[0143] ≤∑P down，i ≤P reg，总 ≤∑P down，i+1 ,

[0144] Then i is the adjustment gear.

[0145] Target value calculation:

[0146] P gen_des，j =P min，j j≥i

[0147] P gen_des，j =P max，j j>i,

[0148] This ensures that the unit target value before gear i is the lower limit, and the unit does not decrease after gear i, and no deep adjustment compensation occurs.

[0149] For the case of increasing output power, when the total regional regulation demand P reg，总 When it is positive (regional increase), the reserve increase (P max，i -P i ), sort the quotations from high to low, accumulate the upward adjustments of each quotation level, and then calculate the level i.

[0150] For units before gear i, the target value is the upper limit of the current gear, and for units after gear i, the target value is the lower limit of the current gear.

[0151] For applicable situations, this control strategy considers the simultaneous sorting and allocation of all units. It is recommended that thermal power adopt a fixed-cycle issuance method, where all units issue instructions at the same time to ensure fair allocation.

[0152] It should also be noted that for the external interface and human-machine optimization of AGC, among them, for the input interface, AGC obtains important data such as peak-shaving auxiliary service quotations, medium- and long-term trading electricity through a text interface; obtains important planning data such as day-ahead and intraday plans through the plan definition table; for the output interface, AGC can provide assessment calculation data to the assessment statistics module; it can also provide important data such as distribution records and alarm information, and can cooperate well with other modules.

[0153] Combined with the actual grid structure of the power grid, it is displayed in a tree form, which helps dispatchers to quickly locate sections and new energy stations and improve interaction efficiency; it provides more eye-catching and rich alarm functions, intuitively displays abnormal conditions in areas and sections, and unit shutdown information, etc.; it provides anti-error verification, and adds prompt information to the human-machine interface for modification operations of section limits. Operations can be performed after secondary confirmation to avoid safety accidents caused by incorrect operations.

[0154] Through this solution, a DC virtual control area is established, utilizing regional deviation control and safety constraint control to enable wind, solar, and thermal power bundling and transmission. Precise automatic power generation control is implemented for various plans and transaction data, including medium- and long-term wind and solar power transactions, spot transactions, and ancillary services. This ensures the precise execution of various market-based transaction components while ensuring section safety. AGC is integrated with the thermal power peak-shaving market to adjust units based on different ancillary service market quotes. The existing AGC interface is optimized for improved aesthetics and operability. This functional improvement will organically integrate grid security and economic operation, further enhance the level of intelligent dispatching automation, improve the capacity to absorb new energy, reduce grid fluctuations, and improve the security and stability of the Qinghai power grid.

[0155] Example 2

[0156] According to an embodiment of the present invention, an automatic power generation control system is provided, which can execute the automatic power generation control method in the above embodiment. The specific implementation scheme and preferred application scenario are the same as those in the above embodiment and will not be described here.

[0157] Figure 12 FIG. 1 is a schematic diagram of an automatic power generation control system according to an embodiment of the present invention. Figure 12 As shown, the system includes:

[0158] The thermal power generation unit 122 and the new energy station 124 are located within the constructed target control area 120 .

[0159] The control master station 126, together with the thermal power unit and the new energy station, is used to automatically control the thermal power unit based on the first planned output power and the first actual output power of the thermal power unit, and the second planned output power and the second actual output power of the new energy station.

[0160] The above-mentioned control master station can be a new energy AGC master station, which can execute the steps of the automatic power generation control method in the above-mentioned embodiment, and will not be described in detail here.

[0161] Example 3

[0162] According to an embodiment of the present invention, a computer-readable storage medium is provided. The computer-readable storage medium includes a stored program. When the program is executed, the device where the computer-readable storage medium is located is controlled to execute the automatic power generation control method in the above-mentioned embodiment 1.

[0163] Example 4

[0164] According to an embodiment of the present invention, a processor is provided, which is used to run a program. When the program is run, the automatic power generation control method in the above-mentioned embodiment 1 is executed.

[0165] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0166] In the above embodiments of the present invention, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0167] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only exemplary. For example, the division of the units can be a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0168] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0169] In addition, the functional units in the various embodiments of the present invention may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0170] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk, etc. Various media that can store program codes.

[0171] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An automatic power generation control method, characterized in that: include: Constructing a target control area, wherein the target control area includes: thermal power units and new energy stations; Obtaining a first planned output power and a first actual output power of the thermal power unit, and a second planned output power and a second actual output power of the new energy station; acquiring a third planned output power and a third actual output power of a target direct current (DC), wherein the target DC corresponds to the target control area; Determining a fourth planned output power of the target control area external tie line based on the first planned output power, the second planned output power, and the third planned output power; Determining a fourth actual output power of the target control area external tie line based on the first actual output power, the second actual output power, and the third actual output power; Obtaining a difference between the fourth actual output power and the fourth planned output power to obtain a regional control deviation; Obtaining a comparison result of the transmission power of the joint transformer and a first preset limit; Based on the regional control deviation and the comparison result, automatic power generation control is performed on the thermal power unit.

2. The method according to claim 1, characterized in that Obtaining the first planned output power of the thermal power unit and the second planned output power of the new energy station includes: Obtaining a DC power transmission plan, as well as short-term power forecast data and ultra-short-term power forecast data of the new energy station; Obtaining a predicted output power of the thermal power unit based on the DC power transmission plan and the short-term power forecast data; The first planned output power and the second planned output power are generated based on the ultra-short-term power forecast data and the predicted output power of the thermal power unit.

3. The method according to claim 1, characterized in that Automatically controlling power generation of the thermal power unit based on the regional control deviation and the comparison result includes: determining, based on the comparison result, a distribution strategy for the regional control deviation; allocating the regional control deviations based on the allocation strategy to determine a first adjustment amount; The actual output power of the thermal power unit is adjusted based on the first adjustment amount.

4. The method according to claim 3, characterized in that Determining the allocation strategy of the regional control deviation based on the comparison result includes: If the comparison result shows that the combined transmission power is less than the first preset limit, determining that the allocation strategy is the first allocation strategy; If the comparison result shows that the difference between the combined transmission power and the first preset limit is within a preset range, determining that the allocation strategy is a second allocation strategy, wherein the first adjustment amount is used to control the actual output power of the thermal power unit to increase; When the comparison result is that the combined transmission power is greater than the difference of the first preset limit, it is determined that the allocation strategy is the third allocation strategy.

5. The method according to claim 3, characterized in that Before adjusting the actual output power of the thermal power unit based on the first adjustment amount, the method further includes: determining an adjustment range of the thermal power unit based on the first planned output power; determining whether the first adjustment amount is within the adjustment range; If the first adjustment amount is within the adjustment range, adjusting the actual output power of the thermal power unit based on the first adjustment amount; If the first adjustment amount is not within the adjustment range, a second adjustment amount within the adjustment range is determined based on the first adjustment amount, and the actual output power of the thermal power unit is adjusted based on the second adjustment amount.

6. The method according to claim 1, characterized in that Before automatically controlling power generation of the thermal power unit based on the regional control deviation and the comparison result, the method further includes: performing data filtering and dynamic dead-zone filtering on the regional control deviation to obtain a filtered regional control deviation; Automatic power generation control is performed on the thermal power unit based on the filtered regional control deviation and the comparison result.

7. The method according to claim 1, characterized in that Before determining the regional control deviation based on the first planned output power, the first actual output power, the second planned output power, and the second actual output power, the method further includes: Performing first-order filtering on the first planned output power and the first actual output power to obtain a filtered first planned output power and a filtered first actual output power; Performing median filtering on the second planned output power and the second actual output power to obtain a filtered second planned output power and a filtered second actual output power; The regional control deviation is determined based on the filtered first planned output power, the filtered first actual output power, the filtered second planned output power, and the filtered second actual output power.

8. The method according to claim 1, characterized in that After automatically controlling power generation of the thermal power unit, the method further includes: Obtaining the total traded power of a target section during a preset time period, wherein the new energy station is located below the target section, and the total traded power is the sum of the traded power of all stations below the target section during the preset time period; Comparing the total transaction power with a second preset limit to obtain a first verification result of the target section; Determining a target output power of the new energy station based on the first verification result; Sending the target output power to the new energy station.

9. The method according to claim 8, characterized in that Determining the target output power of the new energy station based on the first verification result includes: If the first verification result shows that the total transaction power exceeds the second preset limit, the transaction power of the new energy station is reduced to obtain the target output power; When the first verification result is that the total trading power does not exceed the second preset limit, the difference between the total output power of the target section and the total trading power is obtained, the difference is processed according to a first preset ratio to obtain the target power corresponding to the new energy station, and based on the target power, the target output power is obtained.

10. The method according to claim 9, characterized in that Obtaining the target output power based on the target power includes: Determining whether the new energy station is a target station; If the new energy station is the target station, determining the target output power as the sum of the transaction power of the new energy station and the target power; If the new energy station is not the target station, the target output power is determined to be the target power.

11. The method according to claim 8, characterized in that Before sending the target output power to the new energy station, the method further includes: Determining the current state of the target section; When the current state is normal, sending the target output power or the first output power to the new energy station, wherein the first output power is greater than the target output power; When the current state is a jump, sending the target output power to the new energy station; When the current state is paused, it is prohibited to send the target output power to the new energy station; When the current state is emergency, if the target output power is greater than the product of the second actual output power of the new energy station and a preset value, the sum of the second actual output power and the product is sent to the new energy station, wherein, if the current state is still emergency in the next control cycle, the minimum output power of the target output power and the second actual output power is sent to the new energy station.

12. The method according to claim 9, characterized in that When the first verification result is that the total transaction power does not exceed the second preset limit, the method further includes: Obtaining the total spot power of the target section, wherein the total spot power is the sum of the spot power of all stations under the target section; Comparing the total spot electricity with a third preset limit to obtain a second verification result of the target section; Based on the second verification result, the target output power is determined.

13. The method according to claim 12, characterized in that Determining the target output power based on the second verification result includes: If the second verification result shows that the total spot power exceeds the third preset limit, the spot power of the new energy station is adjusted downward to obtain the target output power; When the second verification result is that the total spot power does not exceed the third preset limit, the difference between the total output power of the target section and the total spot power is obtained, the difference is processed according to a second preset ratio to obtain the shared power corresponding to the new energy station, and based on the shared power, the target output power is obtained.

14. The method according to claim 13, characterized in that Obtaining the target output power based on the shared power includes: Determining whether the new energy station is a target station; If the new energy station is the target station, determining the target output power as the sum of the traded power, the spot power and the shared power of the new energy station within the preset time period; If the new energy station is not the target station, the target output power is determined to be the shared power.

15. The method according to claim 1, wherein After automatically controlling power generation of the thermal power unit based on the first planned output power, the first actual output power, the second planned output power, and the second actual output power, the method further includes: Obtain the energy storage power station corresponding to the new energy station; Detecting whether there is power restriction at the new energy station; If the new energy station is subject to power restriction, the charging power of the energy storage power station is determined based on the restricted power of the new energy station.

16. The method according to claim 15, characterized in that Determining the charging power of the energy storage power station based on the limited power of the new energy station includes: In a case where there is a one-to-one relationship between the new energy station and the energy storage power station, determining that the charging power is the limited power; In a case where a many-to-one relationship exists between the new energy station and the energy storage power station, the total restricted power of the energy storage power station is obtained, and based on the capacity of the new energy station, the charging power is determined to be a target restricted power within the total restricted power, wherein the total restricted power is the sum of the restricted powers of the multiple new energy stations corresponding to the energy storage power station.

17. The method according to claim 16, characterized in that After determining that the charging power is the target restricted power in the total restricted power, the charging power of the energy storage power station is adjusted based on the regulation rate of the new energy station.

18. The method according to claim 15, characterized in that When the energy storage power station reaches a discharging time period, the method further includes: Determine whether there is a need to increase the power grid; If there is an upward adjustment demand for the power grid, determining the discharge power of each of the multiple energy storage power stations based on the upward adjustment demand; Determining whether the maximum discharge power of the multiple energy storage power stations meets the upward adjustment requirement; If the maximum discharge power does not meet the upward adjustment requirement, obtaining a difference between the upward adjustment requirement and the maximum discharge power to obtain a remaining adjustment requirement; Based on the remaining regulation demand, the actual output power of the thermal power unit is controlled to increase.

19. The method according to claim 1, wherein After automatically controlling power generation of the thermal power unit based on the first planned output power, the first actual output power, the second planned output power, and the second actual output power, the method further includes: Determining whether the load rates of the thermal power unit and the new energy station are within a preset load range; If the load rate is within the preset load range, the thermal power generation unit is automatically controlled according to a preset regulation amount distribution mode.

20. An automatic power generation control system, characterized in that: include: Thermal power units and new energy stations are located within the established target control area; The control master station, together with the thermal power unit and the new energy station, is used to obtain the third planned output power and the third actual output power of the target DC, wherein the target DC corresponds to the target control area; based on the first planned output power, the second planned output power and the third planned output power, the fourth planned output power of the external interconnection line of the target control area is determined; based on the first actual output power, the second actual output power and the third actual output power, the fourth actual output power of the external interconnection line of the target control area is determined; the difference between the fourth actual output power and the fourth planned output power is obtained to obtain a regional control deviation; a comparison result of the linked transformer transmission power and the first preset limit is obtained; and based on the regional control deviation and the comparison result, automatic power generation control of the thermal power unit is performed.

21. A computer-readable storage medium, characterized in that The computer-readable storage medium includes a stored program, wherein when the program is executed, the device where the computer-readable storage medium is located is controlled to execute the automatic power generation control method according to any one of claims 1 to 19.

22. A processor, characterized in that: The processor is configured to run a program, wherein the program, when running, executes the automatic power generation control method according to any one of claims 1 to 19.

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