A network-province coordinated dispatching method and system for promoting power balance within the province

Abstract

The present invention discloses a network-province coordinated dispatching method and system for promoting intra-provincial power balance in the field of power balance, comprising: obtaining the total power deviation in the province during the coordinated dispatching cycle; distributing the total power deviation in the province to the network-level dispatching system and each provincial-level dispatching system according to the currently set allocation ratio; calculating the equivalent spare capacity of the power plant; and distributing the power deviation allocation amount to each power plant according to the equivalent spare capacity; uploading the deviation imbalance of each power plant to the network-level dispatching system to calculate the total deviation imbalance; when the total deviation imbalance exceeds the set imbalance threshold, distributing the total deviation imbalance; distributing the total power deviation in the province and the total deviation imbalance in turn, and improving the rationality of power deviation allocation through the two allocations, and improving the automation and intelligence level of power grid dispatching.

Description

Technical Field

[0001] The present invention belongs to the technical field of power balance, and specifically relates to a network-province coordinated dispatching method and system for promoting power balance within a province. Background Art

[0002] For the provincial dispatching system, after releasing the next day's power balance plan before the operation day, the dispatching system will modify the plan in real time on the operation day according to the operation status of the power grid to ensure the balance of power generation and supply within the province and the stable operation of the power grid. The deviation between the intraday plan and the day-ahead plan consists of two parts: the power deviation on the power generation side and the power deviation on the power consumption side. How to reasonably allocate the deviation has become an important issue.

[0003] At present, the power balance within the province is mainly achieved through the provincial dispatching system to regulate power plants within the province. The power plants directly dispatched by the grid-level dispatching system participate less in the power balance within the province, and all rely on the form of "provincial dispatching telephone application, grid-level dispatching emergency support". The degree of automation is not high, and there is a lag effect in manual adjustments. Summary of the invention

[0004] The purpose of the present invention is to provide a network-province coordinated dispatching method and system for promoting power balance within the province, by pairing the provincial dispatching system and the network dispatching system to distribute the total power deviation within the province, thereby improving the automation and intelligence level of power grid dispatching.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A first aspect of the present invention provides a network-province coordinated dispatching method for promoting power balance within a province, comprising:

[0007] Obtain the total power deviation within the province during the coordinated dispatch cycle, and upload the power deviation within the province to the grid-level dispatch system;

[0008] Allocate the total power deviation in the province to the grid-level dispatching system and each provincial dispatching system according to the currently set allocation ratio;

[0009] Calculate the equivalent reserve capacity of each power plant under the control of the grid-level dispatching system; and distribute the power deviation allocation amount accepted by the grid-level dispatching system to each power plant under its control according to the equivalent reserve capacity;

[0010] Calculate the equivalent reserve capacity of each power plant under the provincial dispatching system; and distribute the power deviation allocation amount accepted by the provincial dispatching system to each power plant under its control according to the equivalent reserve capacity;

[0011] If the power deviation allocation of the power plant exceeds the power deviation tolerance threshold of the power plant, the remaining deviation is calculated according to the power deviation allocation of the power plant and the power deviation tolerance threshold of the power plant, recorded as the deviation imbalance of the power plant, and the deviation imbalance of each power plant is added to obtain the total deviation imbalance and uploaded to the grid-level dispatching system;

[0012] When the total deviation imbalance exceeds the set imbalance threshold, the total deviation imbalance is distributed; when the total deviation imbalance is less than the set imbalance threshold, the calculation of this cycle is completed, and the total power deviation in the province is calculated and distributed after entering the next coordinated scheduling cycle.

[0013] Preferably, the method for obtaining the total power deviation within the province during the coordinated scheduling cycle includes: obtaining the deviation on the power consumption side within the province and the deviation on the power generation side within the province; and obtaining the total power deviation within the province by subtracting the deviation on the power consumption side within the province from the deviation on the power generation side within the province.

[0014] Preferably, the electricity consumption side deviation includes inter-provincial interconnection line deviation and intra-provincial load deviation.

[0015] Preferably, the power generation side deviation includes various power supply side deviations such as thermal power generation deviation, run-of-the-river hydropower generation deviation, non-run-of-the-river hydropower generation deviation, photovoltaic power generation deviation, and wind power generation deviation.

[0016] Preferably, the calculation method of the equivalent reserve capacity of a power plant includes: obtaining the power plant's ramp constraint value, output upper and lower limit constraint values, and section-restricted capacity, and taking the intersection of the power plant's ramp constraint value, output upper and lower limit constraint values, and section-restricted capacity to obtain the power plant's equivalent reserve capacity.

[0017] Preferably, the method of allocating the power deviation allocation amount received by the grid-level dispatching system to each power plant under its control according to the equivalent reserve capacity includes: sorting the power plants participating in the allocation of the grid-level dispatching system according to the size of the equivalent reserve capacity to form a sequence of power plants to be allocated; allocating the power deviation allocation amount received by the grid-level dispatching system in sequence according to the sequence of power plants to be allocated, and the upper limit of the power deviation allocation amount received by the power plant is the equivalent reserve capacity.

[0018] Preferably, the method of allocating the power deviation allocation amount accepted by the provincial dispatching system to each power plant under its control according to the equivalent reserve capacity includes: sorting the power plants participating in the allocation of the provincial dispatching system according to the size of the equivalent reserve capacity to form a sequence of power plants to be allocated; allocating the power deviation allocation amount accepted by the provincial dispatching system in sequence according to the sequence of power plants to be allocated, and the upper limit of the power deviation allocation amount accepted by the power plant is the equivalent reserve capacity.

[0019] A second aspect of the present invention provides a network-province coordinated dispatching system for promoting power balance within a province, comprising:

[0020] The acquisition module is used to calculate the total power deviation within the province during the coordinated dispatch cycle and upload the power deviation within the province to the grid-level dispatch system;

[0021] Deviation allocation module, used to allocate the total power deviation in the province to the grid-level dispatching system and each provincial dispatching system according to the currently set allocation ratio; calculate the equivalent spare capacity of each power plant managed by the grid-level dispatching system; and allocate the power deviation allocation amount accepted by the grid-level dispatching system to each power plant managed by it according to the equivalent spare capacity; calculate the equivalent spare capacity of each power plant managed by the provincial dispatching system; and allocate the power deviation allocation amount accepted by the provincial dispatching system to each power plant managed by it according to the equivalent spare capacity;

[0022] Deviation imbalance analysis module: if the power deviation allocation received by the power plant exceeds the power deviation tolerance threshold of the power plant, the remaining deviation is calculated based on the power deviation allocation received by the power plant and the power deviation tolerance threshold of the power plant, and recorded as the deviation imbalance of the power plant. The deviation imbalance of each power plant is uploaded to the grid-level dispatching system to calculate the total deviation imbalance;

[0023] The judgment module is used to distribute the total deviation imbalance when the total deviation imbalance exceeds the set imbalance threshold; when the total deviation imbalance is less than the set imbalance threshold, recalculate the total power deviation in the province in the next coordinated scheduling cycle and distribute it.

[0024] The second aspect of the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the network-province collaborative scheduling method when executing the program.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention distributes the total power deviation in the province to the grid-level dispatching system and each provincial dispatching system according to the currently set distribution ratio; calculates the equivalent spare capacity of the power plant; and distributes the power deviation distribution amount to each power plant according to the equivalent spare capacity; the deviation imbalance of the power plant, uploads the deviation imbalance of each power plant to the grid-level dispatching system to calculate the total deviation imbalance; when the total deviation imbalance exceeds the set imbalance threshold, distributes the total deviation imbalance; distributes the total power deviation in the province and the total deviation imbalance in turn, and improves the rationality of power deviation distribution through two distributions, and improves the automation and intelligent level of power grid dispatching. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a flow chart of a network-province coordinated dispatching method for promoting power balance within a province provided in the second embodiment of the present invention. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0029] Embodiment 1

[0030] like Figure 1 As shown, the first aspect of the present invention provides a network-province coordinated dispatching method for promoting power balance within a province, comprising:

[0031] The method for obtaining the total power deviation in the province during the coordinated dispatch cycle includes: obtaining the deviation on the power consumption side and the deviation on the power generation side in the province; subtracting the deviation on the power generation side from the deviation on the power consumption side to obtain the total power deviation in the province. The power consumption side deviation includes the deviation on the inter-provincial interconnection line and the provincial load deviation; the power generation side deviation includes the deviation on the thermal power generation, the deviation on the run-of-river hydropower generation, the deviation on the non-run-of-river hydropower generation, the deviation on the photovoltaic power generation and the deviation on the wind power generation;

[0032] The calculation method for the inter-provincial interconnection line deviation, thermal power generation deviation, non-run-of-river hydropower generation deviation, thermal power and other power generation sources deviation is to subtract the intra-day plan of this type from the day-ahead plan; the calculation method for the run-of-river hydropower generation deviation, photovoltaic power generation deviation, and wind power generation deviation is to subtract the real-time power generation output of this power generation type from the day-ahead predicted output; the calculation method for the intra-provincial load deviation is to subtract the real-time load from the day-ahead predicted load.

[0033] Upload the power deviation within the province to the grid-level dispatching system; distribute the total power deviation within the province to the grid-level dispatching system and various provincial dispatching systems according to the currently set allocation ratio;

[0034] The method comprises: sorting the power plants participating in the allocation of the grid-level dispatching system according to the size of the equivalent spare capacity to form a sequence of power plants to be allocated; and allocating the power deviation allocation amount accepted by the grid-level dispatching system in the sequence of power plants to be allocated, wherein the upper limit of the power deviation allocation amount accepted by the power plant is the equivalent spare capacity.

[0035] Calculate the equivalent spare capacity of each power plant regulated by the provincial dispatching system; distribute the power deviation allocation amount accepted by the provincial dispatching system to each power plant regulated by it according to the equivalent spare capacity. The method includes: sorting the power plants participating in the allocation of the provincial dispatching system according to the size of the equivalent spare capacity to form a sequence of power plants to be allocated; distribute the power deviation allocation amount accepted by the provincial dispatching system in the sequence of power plants to be allocated in turn, and the upper limit of the power deviation allocation amount accepted by the power plant is the equivalent spare capacity.

[0036] The calculation method of the equivalent reserve capacity of a power plant includes: obtaining the power plant's ramp constraint value, output upper and lower limit constraint values ​​and section restricted capacity, and performing weighted summation of the power plant's ramp constraint value, output upper and lower limit constraint value and section restricted capacity to obtain the power plant's equivalent reserve capacity; the section restricted capacity is constrained by the section limit value and is calculated through DC sensitivity, and the calculation method is: calculating the section residual capacity through the section limit value and the current flow of the section, and calculating the power plant restricted capacity with the DC sensitivity as the proportion.

[0037] If the power deviation allocation received by the power plant exceeds the power deviation tolerance threshold of the power plant, the remaining deviation is calculated based on the power deviation allocation received by the power plant and the power deviation tolerance threshold of the power plant and recorded as the deviation imbalance of the power plant. The deviation imbalance of each power plant is uploaded to the grid-level dispatching system to calculate the total deviation imbalance;

[0038] When the total deviation imbalance exceeds the set imbalance threshold, the total deviation imbalance is distributed; when the total deviation imbalance is less than the set imbalance threshold, the total power deviation in the province in the next coordinated dispatching cycle is recalculated and distributed; the total power deviation in the province and the total deviation imbalance are distributed successively. The rationality of power deviation distribution is improved through two distributions, and the level of automation and intelligence of power grid dispatching is improved.

[0039] Embodiment 2

[0040] A network-province coordinated dispatching system for promoting power balance within a province. The system provided in this embodiment can be applied to the method described in embodiment 1, including:

[0041] The acquisition module is used to calculate the total power deviation within the province during the coordinated dispatch cycle and upload the power deviation within the province to the grid-level dispatch system;

[0042] Deviation allocation module, which allocates the total power deviation in the province to the grid-level dispatching system and each provincial dispatching system according to the currently set allocation ratio; calculates the equivalent spare capacity of each power plant managed by the grid-level dispatching system; and allocates the power deviation allocation amount accepted by the grid-level dispatching system to each power plant managed by it according to the equivalent spare capacity; calculates the equivalent spare capacity of each power plant managed by the provincial dispatching system; and allocates the power deviation allocation amount accepted by the provincial dispatching system to each power plant managed by it according to the equivalent spare capacity;

[0043] Deviation imbalance analysis module: if the power deviation allocation of the power plant exceeds the power deviation tolerance threshold of the power plant, the remaining deviation is calculated according to the power deviation allocation of the power plant and the power deviation tolerance threshold of the power plant, and recorded as the deviation imbalance of the power plant. The deviation imbalance of each power plant is added to obtain the total deviation imbalance and uploaded to the grid-level dispatching system;

[0044] The judgment module is used to distribute the total deviation imbalance when the total deviation imbalance exceeds the set imbalance threshold; when the total deviation imbalance is less than the set imbalance threshold, the calculation of this cycle is completed, and wait for entering the next coordinated scheduling cycle to calculate the total power deviation in the province and distribute it.

[0045] Embodiment 3

[0046] An electronic device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of the network-province collaborative scheduling method described in Example 1 are implemented.

[0047] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0048] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0049] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0050] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0051] 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 technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for coordinated dispatching between power grids and provinces to promote power balance within a province, characterized in that: include: Obtain the total power deviation within the province during the coordinated dispatch cycle, and upload the power deviation within the province to the grid-level dispatch system; Allocate the total power deviation in the province to the grid-level dispatching system and each provincial dispatching system according to the currently set allocation ratio; Calculate the equivalent reserve capacity of each power plant regulated by the grid-level dispatching system, the process includes: obtaining the ramp constraint value, the upper and lower limit constraint value of the output and the section restricted capacity of each power plant regulated by the grid-level dispatching system, taking the intersection of the ramp constraint value, the upper and lower limit constraint value of the output and the section restricted capacity of each power plant regulated by the grid-level dispatching system to obtain the equivalent reserve capacity of each power plant regulated by the grid-level dispatching system; The process of allocating the power deviation allocation amount accepted by the grid-level dispatching system to each power plant under its control according to the equivalent reserve capacity includes: sorting each power plant participating in the allocation of the grid-level dispatching system according to the equivalent reserve capacity to form a sequence of power plants to be allocated; allocating the power deviation allocation amount accepted by the grid-level dispatching system in turn according to the sequence of power plants to be allocated, and the upper limit of the power deviation allocation amount accepted by the power plant is the equivalent reserve capacity; Calculate the equivalent reserve capacity of each power plant under the provincial dispatching system, the process includes: obtaining the ramp constraint value, output upper and lower limit constraint value and section restricted capacity of each power plant under the provincial dispatching system, taking the intersection of the ramp constraint value, output upper and lower limit constraint value and section restricted capacity of each power plant under the provincial dispatching system to obtain the equivalent reserve capacity of each power plant under the provincial dispatching system; The method for allocating the power deviation allocation amount accepted by the provincial dispatching system to each power plant under its control according to the equivalent reserve capacity includes: sorting each power plant participating in the allocation of the provincial dispatching system according to the size of the equivalent reserve capacity to form a sequence of power plants to be allocated; allocating the power deviation allocation amount accepted by the provincial dispatching system in turn according to the sequence of power plants to be allocated, and the upper limit of the power deviation allocation amount accepted by the power plant is the equivalent reserve capacity; If the power deviation allocation of the power plant exceeds the power deviation tolerance threshold of the power plant, the remaining deviation is calculated according to the power deviation allocation of the power plant and the power deviation tolerance threshold of the power plant, recorded as the deviation imbalance of the power plant, and the deviation imbalance of each power plant is added to obtain the total deviation imbalance and uploaded to the grid-level dispatching system; When the total deviation imbalance exceeds the set imbalance threshold, the total deviation imbalance is distributed; when the total deviation imbalance is less than the set imbalance threshold, the calculation of this cycle is completed, and the total power deviation in the province is calculated and distributed after entering the next coordinated scheduling cycle.

2. A method for coordinated dispatching between power grids and provinces to promote power balance within a province according to claim 1, characterized in that: The method for obtaining the total power deviation in the province during the coordinated dispatching cycle includes: obtaining the deviation on the power consumption side and the power generation side in the province; and subtracting the deviation on the power generation side from the deviation on the power consumption side to obtain the total power deviation in the province.

3. A method for coordinated dispatching between power grids and provinces to promote power balance within a province according to claim 2, characterized in that: The electricity consumption side deviation includes inter-provincial interconnection line deviation and intra-provincial load deviation.

4. A method for coordinated dispatching between power grids and provinces to promote power balance within a province according to claim 2, characterized in that: The deviations on the power generation side include thermal power generation deviation, run-of-the-river hydropower generation deviation, non-run-of-the-river hydropower generation deviation, photovoltaic power generation deviation and wind power generation deviation.

5. A network-province coordinated dispatching system for promoting power balance within a province, characterized in that: include: The acquisition module is used to calculate the total power deviation within the province during the coordinated dispatch cycle and upload the power deviation within the province to the grid-level dispatch system; Deviation allocation module, used to allocate the total power deviation in the province to the grid-level dispatching system and each provincial dispatching system according to the currently set allocation ratio; Calculate the equivalent spare capacity of each power plant under the control of the grid-level dispatching system; and distribute the power deviation allocation amount accepted by the grid-level dispatching system to each power plant under its control according to the equivalent spare capacity; Calculate the equivalent spare capacity of each power plant under the control of the provincial dispatching system; and distribute the power deviation allocation amount accepted by the provincial dispatching system to each power plant under its control according to the equivalent spare capacity; Deviation imbalance analysis module: if the power deviation allocation of the power plant exceeds the power deviation tolerance threshold of the power plant, the remaining deviation is calculated according to the power deviation allocation of the power plant and the power deviation tolerance threshold of the power plant, and recorded as the deviation imbalance of the power plant. The deviation imbalance of each power plant is added to obtain the total deviation imbalance and uploaded to the grid-level dispatching system; The judgment module is used to distribute the total deviation imbalance when the total deviation imbalance exceeds the set imbalance threshold; when the total deviation imbalance is less than the set imbalance threshold, the calculation of this cycle is completed, and the total deviation of power in the province is calculated and distributed after entering the next coordinated scheduling cycle; The deviation allocation module calculates the equivalent spare capacity of each power plant regulated by the grid-level dispatching system, and the process includes: obtaining the climbing constraint value, the upper and lower limit constraint value of the output and the section restricted capacity of each power plant regulated by the grid-level dispatching system, and taking the intersection of the climbing constraint value, the upper and lower limit constraint value of the output and the section restricted capacity of each power plant regulated by the grid-level dispatching system to obtain the equivalent spare capacity of each power plant regulated by the grid-level dispatching system; The process in which the deviation allocation module allocates the power deviation allocation amount received by the grid-level dispatching system to each power plant under its control according to the equivalent spare capacity includes: sorting each power plant participating in the allocation of the grid-level dispatching system according to the equivalent spare capacity to form a sequence of power plants to be allocated; allocating the power deviation allocation amount received by the grid-level dispatching system in sequence according to the sequence of power plants to be allocated, and the upper limit of the power deviation allocation amount received by the power plant is the equivalent spare capacity; The deviation allocation module calculates the equivalent spare capacity of each power plant under the provincial dispatching system, and the process includes: obtaining the ramp constraint value, the upper and lower limit constraint value of the output and the section restricted capacity of each power plant under the provincial dispatching system, and taking the intersection of the ramp constraint value, the upper and lower limit constraint value of the output and the section restricted capacity of each power plant under the provincial dispatching system to obtain the equivalent spare capacity of each power plant under the provincial dispatching system; The method in which the deviation allocation module allocates the power deviation allocation amount accepted by the provincial dispatching system to each power plant under its control according to the equivalent spare capacity includes: sorting the power plants participating in the allocation of the provincial dispatching system according to the size of the equivalent spare capacity to form a sequence of power plants to be allocated; allocating the power deviation allocation amount accepted by the provincial dispatching system in sequence according to the sequence of power plants to be allocated, and the upper limit of the power deviation allocation amount accepted by the power plant is the equivalent spare capacity.

6. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps of the network-province collaborative scheduling method described in any one of claims 1 to 4 are implemented.

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