CN112653196B - Power system power generation side standby resource scheduling method, system, device and medium - Google Patents
Power system power generation side standby resource scheduling method, system, device and medium Download PDFInfo
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- CN112653196B CN112653196B CN202011426160.4A CN202011426160A CN112653196B CN 112653196 B CN112653196 B CN 112653196B CN 202011426160 A CN202011426160 A CN 202011426160A CN 112653196 B CN112653196 B CN 112653196B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
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Abstract
The invention discloses a method, a system, a device and a medium for scheduling standby resources at a power generation side of a power system, wherein the method comprises the following steps: acquiring resource characteristic parameters of generator sets at the power generation side of a power system; determining a first generator set for providing fast standby resources, a second generator set for providing slow standby resources and a third generator set for providing short-term standby resources according to the resource characteristic parameters, and determining fast standby resource capacity, slow standby resource capacity and short-term standby resource capacity; determining a fast standby requirement, a slow standby requirement, and a short-term standby requirement of a power system; and scheduling the standby resources on the power generation side of the power system according to the capacity of the fast standby resources, the capacity of the slow standby resources, the capacity of the short-term standby resources, the fast standby requirement, the slow standby requirement and the short-term standby requirement. The method is beneficial to reasonably scheduling the standby resources of the power system, improves the stability of the power system, and can be widely applied to the technical field of power system control.
Description
Technical Field
The invention relates to the technical field of power system control, in particular to a method, a system, a device and a medium for scheduling standby resources on a power generation side of a power system.
Background
To cope with the uncertainty of the system, the power system must reserve a certain margin of spare resources. The standby resources play an important role in the safety and reliability of the operation of the power system. Compared with other products, the electric energy has the characteristic of difficult storage, the load demand and the new energy power generation capacity fluctuate randomly within a certain range and cannot be accurately predicted, so that the system has enough spare capacity to meet the demand of a user in order to avoid huge loss of society caused by influence on normal life and work of the user due to insufficient power supply.
At present, the conventional method is to divide the spare capacity into load spare and accident spare according to the reason of generating the spare demand, but the method for dividing the spare capacity is not clear, and the spare resources of all the categories are overlapped in a crossing way, for example, the spare resource of one unit can be used for compensating the prediction error of load or new energy power generation and can also be used for compensating the loss caused by the accident. Based on the division standard of the standby demands, the scheduling method of the standby resources on the power generation side of the power system in the prior art is often inaccurate and unreliable, affects the safety and stability of the power system, and is not beneficial to the stable operation of the power system.
Disclosure of Invention
The present invention aims to solve at least to some extent one of the technical problems existing in the prior art.
Therefore, an object of an embodiment of the present invention is to provide a method for scheduling backup resources on a power generation side of a power system, in which a backup demand is divided into a fast backup demand, a slow backup demand, and a short-term backup demand, a first discovery unit, a second generation unit, and a third generation unit that respectively provide the fast backup resource, the slow backup resource, and the short-term backup resource are determined according to resource characteristic parameters of each generation unit of the power system, and then the backup resources on the power generation side of the power system are scheduled according to backup demands of each stage and backup resource capacities of each stage. The method and the device can more clearly and reasonably determine the standby demand capacity of the power system so as to meet the unknown change of the power demand of the power grid, improve the accuracy of standby resource allocation and facilitate the reasonable scheduling of the standby resources of the power system compared with the prior art, thereby improving the safety and the stability of the power system.
Another object of the embodiments of the present invention is to provide a power system power generation side standby resource scheduling system.
In order to achieve the technical purpose, the technical scheme adopted by the embodiment of the invention comprises the following steps:
in a first aspect, an embodiment of the present invention provides a method for scheduling standby resources on a power generation side of a power system, including the following steps:
acquiring resource characteristic parameters of generator sets at the power generation side of a power system;
determining a first generator set for providing a fast standby resource, a second generator set for providing a slow standby resource and a third generator set for providing a short-term standby resource according to the resource characteristic parameters, and determining a fast standby resource capacity, a slow standby resource capacity and a short-term standby resource capacity;
determining a fast backup demand, a slow backup demand, and a short term backup demand of a power system;
and scheduling the standby resources on the power generation side of the power system according to the capacity of the fast standby resources, the capacity of the slow standby resources, the capacity of the short-term standby resources, the fast standby demand, the slow standby demand and the short-term standby demand.
Further, in one embodiment of the present invention, the resource characteristic parameters include a power adjustment speed, an average climbing speed, a power generation duration, and a state transition time.
Further, in one embodiment of the invention, the fast standby resource is used for tertiary frequency modulation, regressive AGC adjustment and first accident backup, the slow standby resource is used for wind power climbing, load climbing and second accident backup, and the short standby resource is used for unplanned short-time peak shaving.
Further, in one embodiment of the invention, the first power generating unit comprises a hydroelectric generating unit with regulating capacity, a single-cycle gas turbine, a part of regulating capacity of the running coal-fired unit and the combined-cycle gas unit which does not exceed 20% of rated capacity, and a pumped-storage power plant in a starting state, the second power generating unit comprises a part of regulating capacity of the running coal-fired unit and the combined-cycle gas unit which exceeds 20% of rated capacity, a pumped-storage power plant in a shutdown state or a reverse running state, and a stopped single-cycle gas turbine, and the third power generating unit comprises a combined-cycle gas turbine which can be hot-started.
Further, in an embodiment of the present invention, the step of determining the fast standby requirement, the slow standby requirement and the short-term standby requirement of the power system specifically includes:
determining an accident standby demand, and determining the rapid standby demand according to a prediction error of a maximum load within 30 minutes from the current moment, a prediction error of the sum of the power generation power of the provincial new energy at the first current time period and the accident standby demand;
determining the slow standby demand according to a prediction error of a maximum load within 1 hour from the current moment, a prediction error of the sum of the power generation power of the total province new energy in a second current time period, the accident standby demand and the fast standby demand;
and determining the short-term standby demand according to the prediction error of the maximum load within 2 hours from the current moment, the prediction error of the sum of the third current time period total provincial new energy power generation, the accident standby demand, the fast standby demand and the slow standby demand.
Further, in one embodiment of the present invention, the contingency reserve requires a maximum of three: the maximum planned power of a single generator in province, the maximum generated power of a single wind power plant in province and the maximum power loss caused by direct current single-click failure.
Further, in an embodiment of the present invention, the step of scheduling the power system generation side standby resource according to the fast standby resource capacity, the slow standby resource capacity, the short-term standby resource capacity, the fast standby demand, the slow standby demand, and the short-term standby demand specifically includes:
respectively calculating the upward fast standby resource capacity and the downward fast standby resource capacity of the first generator set, the upward slow standby resource capacity and the downward slow standby resource capacity of the second generator set and the upward short-term standby resource capacity and the downward short-term standby resource capacity of the third generator set;
considering the influence of the cascade power station, and adjusting the standby resources of the cascade power station;
respectively summarizing the capacity of the fast standby resources, the capacity of the slow standby resources and the capacity of the short-term standby resources according to the general dispatching units of each province and each region to obtain the statistics of the standby resources in a first province;
considering intra-provincial power transmission channel capacity limit, and adjusting the first intra-provincial standby resource statistic to obtain a second intra-provincial standby resource statistic;
and calculating an inter-provincial supportable reserve capacity limit according to the second intra-provincial reserve resource statistic, the fast reserve demand, the slow reserve demand, the short-term reserve demand and the transmission capacity of an inter-provincial communication channel, and scheduling the power system power generation side reserve resources according to the inter-provincial supportable reserve capacity limit.
In a second aspect, an embodiment of the present invention provides a power system generation side standby resource scheduling system, including:
the first acquisition module is used for acquiring resource characteristic parameters of each generator set at the power generation side of the power system;
the standby resource capacity determining module is used for determining a first generator set used for providing the fast standby resource, a second generator set used for providing the slow standby resource and a third generator set used for providing the short-term standby resource according to the resource characteristic parameters, and determining the fast standby resource capacity, the slow standby resource capacity and the short-term standby resource capacity;
the standby requirement determining module is used for determining a fast standby requirement, a slow standby requirement and a short-term standby requirement of the power system;
and the standby resource scheduling module is used for scheduling the standby resources on the power generation side of the power system according to the fast standby resource capacity, the slow standby resource capacity, the short-term standby resource capacity, the fast standby requirement, the slow standby requirement and the short-term standby requirement.
In a third aspect, an embodiment of the present invention provides a power system power generation side standby resource scheduling device, including:
at least one processor;
at least one memory for storing at least one program;
when the at least one program is executed by the at least one processor, the at least one program causes the at least one processor to implement a power system generation side backup resource scheduling method as described above.
In a fourth aspect, the embodiment of the present invention further provides a computer-readable storage medium, in which a processor-executable program is stored, and the processor-executable program is used for executing the above-mentioned power system power generation side standby resource scheduling method when executed by a processor.
Advantages and benefits of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention:
according to the embodiment of the invention, the standby requirements are divided into the fast standby requirements, the slow standby requirements and the short-term standby requirements, the first discovery unit, the second generation unit and the third generation unit which respectively provide the fast standby resources, the slow standby resources and the short-term standby resources are determined according to the resource characteristic parameters of the generator sets of the power system, and then the standby resources at the power generation side of the power system are scheduled according to the standby requirements at all levels and the capacity of the standby resources at all levels. The method and the device can more clearly and reasonably determine the standby demand capacity of the power system so as to meet the unknown change of the power demand of the power grid, improve the accuracy of standby resource allocation and facilitate the reasonable scheduling of the standby resources of the power system compared with the prior art, thereby improving the safety and the stability of the power system.
Drawings
In order to more clearly illustrate the technical solution in the embodiment of the present invention, the following description is made on the drawings required to be used in the embodiment of the present invention, and it should be understood that the drawings in the following description are only for convenience and clarity of describing some embodiments in the technical solution of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flowchart illustrating steps of a method for scheduling standby resources on a power generation side of a power system according to an embodiment of the present invention;
fig. 2 is a block diagram of a power system power generation side standby resource scheduling system according to an embodiment of the present invention;
fig. 3 is a block diagram of a power system power generation side standby resource scheduling device according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. The step numbers in the following embodiments are provided only for convenience of illustration, the order between the steps is not limited at all, and the execution order of each step in the embodiments can be adapted according to the understanding of those skilled in the art.
In the description of the present invention, the meaning of a plurality is two or more, if there is a description to the first and the second for the purpose of distinguishing technical features, it is not understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features. Furthermore, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art.
Referring to fig. 1, an embodiment of the present invention provides a method for scheduling standby resources on a power generation side of a power system, which specifically includes the following steps:
s101, acquiring resource characteristic parameters of generator sets on the power generation side of a power system;
specifically, the embodiment of the invention combs the resource characteristic parameters of the hydroelectric generating set, the thermal generating set, the gas generating set, the storage unit and the energy storage unit, distinguishes the common units and the units with better flexibility, and determines the flexibility index of each unit.
Further as an alternative embodiment, the resource characteristic parameters include power regulation speed, average hill climbing speed, power generation duration, and state transition time.
In particular, the power regulation speed and the duration of the power generation of a common type of units are shown in table 1 below.
TABLE 1
The flexibility indexes of the coal-fired and gas-fired power units (thermal power units) are shown in table 2 below.
TABLE 2
Wherein a warm start indicates that the genset is not running for less than 8 hours and a cold start indicates that the genset has been running for more than 48 hours.
S102, determining a first generator set for providing the fast standby resource, a second generator set for providing the slow standby resource and a third generator set for providing the short-term standby resource according to the resource characteristic parameters, and determining the fast standby resource capacity, the slow standby resource capacity and the short-term standby resource capacity.
Specifically, in the embodiment of the present invention, the standby resources and the standby requirements are classified into three categories according to the response time: fast standby (response time less than 10-15 minutes), slow standby (response time less than 30 minutes), short standby (response time 1-2 hours), all including up-regulation standby and down-regulation standby, which need to be measured separately.
Further as an optional implementation, the fast standby resource is used for tertiary frequency modulation, regressive AGC adjustment and first accident backup, the slow standby resource is used for wind power climbing, load climbing and second accident backup, and the short standby resource is used for unplanned short-time peak shaving.
As a further alternative embodiment, the first power generation unit includes a hydroelectric power unit with regulation capability, a single-cycle gas turbine, a part of the regulation capability of the coal-fired unit and the combined-cycle gas unit in an operating state, which does not exceed 20% of the rated capacity, and a pumped-storage power plant in a startup state, the second power generation unit includes a part of the regulation capability of the coal-fired unit and the combined-cycle gas unit, which exceeds 20% of the rated capacity, a pumped-storage power plant in a shutdown state or a reverse operation state, and a pumped-storage gas turbine in a shutdown state, and the third power generation unit includes a combined-cycle gas unit which can be thermally started.
Specifically, the standby resource classification and the corresponding generator set provided by the embodiment of the present invention are shown in table 3 below.
TABLE 3
The embodiment of the invention does not classify according to the reason of generating the standby demand by a conventional method, because the standby resource of the same unit can be used for making up the prediction error of load or new energy power generation and can also be used for making up the power shortage caused by accidents; nor is it classified by rotational or non-rotational spares, but by response time. It can be understood that the embodiment of the present invention does not relate to the scheduling order of the standby resources in the classification of the standby resources, and determines the scheduling order in combination with the constraints of economic safety and the like in the real-time scheduling link.
S103, determining a fast standby requirement, a slow standby requirement and a short-term standby requirement of the power system;
specifically, the embodiment of the invention determines the fast standby requirement, calculates the sum of the fast standby requirement and the slow standby requirement to obtain the slow standby requirement, and calculates the total standby requirement to obtain the short-term standby requirement. Step S103 specifically includes the following steps:
s1031, determining emergency standby requirements, and determining rapid standby requirements according to the prediction error of the maximum load within 30 minutes from the current moment, the prediction error of the sum of the power generation power of the total province new energy in the first current time period and the emergency standby requirements;
s1032, determining a slow standby demand according to the prediction error of the maximum load within 1 hour from the current moment, the prediction error of the total power generation sum of the total province new energy in the second current time period, the accident standby demand and the fast standby demand;
and S1033, determining a short-term standby demand according to the prediction error of the maximum load within 2 hours from the current moment, the prediction error of the total sum of the third current time period total provincial new energy power generation power, the accident standby demand, the fast standby demand and the slow standby demand.
Specifically, the AGC adjustment required capacity is calculated firstly, and is calculated according to consideration of each provincial network, wherein the AGC adjustment required capacity is calculated according to a fluctuation amount predicted value of the sum of the base number of the maximum predicted load of the current time period (10-15 minutes) and 1% + the generation power of the total provincial new energy of the current time period (10-15 minutes).
The predicted value of the fluctuation amount of the total new energy power generation power sum of the province can be estimated according to the maximum power generation power predicted value in the current time interval multiplied by the actual fluctuation coefficient of the new energy power generation power in the previous time interval.
The fast standby requirement is then calculated. Fast reserve demand = predicted error of maximum load + 50% of emergency reserve demand + predicted error of total new energy generation power sum of total province for the current time period (30 minutes) within 30 minutes from the current time (current real-time planning cycle and next planning cycle).
Wherein both prediction errors can be estimated as the power prediction value of the current time interval x the actual prediction error percentage of the previous time interval. If not, a percentage coefficient may be preset based on historical statistics.
The accident reserve takes the maximum value of the following three: { planned power of a single generator (planned output within 30 minutes) with the maximum provincial power, the generated power of a single wind farm with the maximum provincial power (predicted output within 30 minutes according to the fact that the same PCC is connected for consideration), and the maximum power loss caused by direct current single-pole faults (planned power within 30 minutes according to the call of sound level transmission margin) are adopted.
The fast standby demand + the slow standby demand is then calculated. Fast standby demand + slow standby demand = prediction error of maximum load + prediction error of accident standby demand + total of provincial new energy generated power for current time period (1 hour) within 1 hour from current time (current real-time planning cycle and next planning cycle).
The calculation mode of the prediction error and the accident standby requirement is the same as the above, and the difference is that the statistical period is changed to 1 hour.
From this, the slow standby requirement can be calculated.
The total standby demand, i.e., fast standby demand + slow standby demand + short-term standby demand, is then calculated. Total reserve demand = prediction error of maximum load + accident reserve demand + prediction error of total provincial new energy generation power sum for the current time period (2 hours) within 2 hours from the current time.
The calculation mode of the prediction error and the accident standby requirement is the same as the above, and the statistical period is changed into 2 hours.
From which the short term backup requirement can be calculated.
And S104, scheduling the power system power generation side standby resources according to the fast standby resource capacity, the slow standby resource capacity, the short-term standby resource capacity, the fast standby demand, the slow standby demand and the short-term standby demand.
Specifically, on the basis of the determination of the parameters, the real-time scheduling part only needs to list specific calculation formulas and interface data requirements. Step S104 specifically includes the following steps:
s1041, respectively calculating the upward fast standby resource capacity and the downward fast standby resource capacity of the first generator set, the upward slow standby resource capacity and the downward slow standby resource capacity of the second generator set, and the upward short-term standby resource capacity and the downward short-term standby resource capacity of the third generator set;
s1042, considering the influence of the cascade power station, and adjusting the standby resources of the cascade power station;
s1043, respectively summarizing the capacity of the fast standby resources, the capacity of the slow standby resources and the capacity of the short-term standby resources according to the total dispatching units of each province and each region to obtain the statistics of the standby resources in the first province;
s1044, considering intra-provincial power transmission channel capacity limit, and adjusting the first intra-provincial standby resource statistic to obtain a second intra-provincial standby resource statistic;
and S1045, calculating an inter-provincial supportable reserve capacity limit according to the second intra-provincial reserve resource statistic, the fast reserve demand, the slow reserve demand, the short-term reserve demand and the transmission capacity of the inter-provincial communication channel, and scheduling the power system power generation side reserve resources according to the inter-provincial supportable reserve capacity limit.
Specifically, first, the influence of a power transmission channel and a cascade power station is not counted, and the reserve (progressive amount) of a branch station and a reserve in three stages are respectively calculated to be reserved upwards and downwards; then, the limitation of a power transmission channel is not counted, but the influence of the step hydropower station is considered, and the standby step hydropower station is adjusted; then, the limitation of a power transmission channel is not counted, and three-level progressive standby resources are respectively summarized for a 5-province region and a south network main straightening and adjusting unit (the interior is further divided according to provinces); then, considering the capacity limit of an intra-provincial power transmission channel, and correcting intra-provincial standby resource statistics; then evaluating profit and loss according to the measured real-time standby requirements and resources of all levels in province; if the spare shortage exists in the province or the difference of the spare profit and loss of each province is large, the inter-province support can be considered, the power transmission capacity of the inter-province communication channel is considered according to the support direction, the limit value of the spare capacity which can be supported by the province is measured and calculated, and the spare resources are scheduled.
Compared with the prior art, the invention also has the following advantages:
1) The embodiment of the invention provides a more refined method for measuring and calculating the standby requirement, and considers the requirements of real-time standby monitoring and real-time plan adjustment in a period of 15 minutes.
2) The embodiment of the invention considers the uncertainty of new energy power generation.
3) The embodiment of the invention combines the accident standby and the load standby according to a certain proportion to form the total standby requirement, and the measurement and calculation are more accurate.
4) The embodiment of the invention forms a clear classification measuring and calculating method aiming at the standby requirements of different response times.
Referring to fig. 2, an embodiment of the present invention provides a power system power generation side standby resource scheduling system, including:
the first acquisition module is used for acquiring resource characteristic parameters of each generator set at the power generation side of the power system;
the standby resource capacity determining module is used for determining a first generator set for providing the fast standby resource, a second generator set for providing the slow standby resource and a third generator set for providing the short-term standby resource according to the resource characteristic parameters, and determining the fast standby resource capacity, the slow standby resource capacity and the short-term standby resource capacity;
the standby requirement determining module is used for determining a fast standby requirement, a slow standby requirement and a short-term standby requirement of the power system;
and the standby resource scheduling module is used for scheduling the standby resources on the power generation side of the power system according to the fast standby resource capacity, the slow standby resource capacity, the short-term standby resource capacity, the fast standby requirement, the slow standby requirement and the short-term standby requirement.
The contents in the above method embodiments are all applicable to the present system embodiment, the functions specifically implemented by the present system embodiment are the same as those in the above method embodiment, and the beneficial effects achieved by the present system embodiment are also the same as those achieved by the above method embodiment.
Referring to fig. 3, an embodiment of the present invention provides a power system power generation side standby resource scheduling device, including:
at least one processor;
at least one memory for storing at least one program;
when the at least one program is executed by the at least one processor, the at least one processor is enabled to implement the power system power generation side standby resource scheduling method.
The contents in the above method embodiments are all applicable to the present apparatus embodiment, the functions specifically implemented by the present apparatus embodiment are the same as those in the above method embodiments, and the advantageous effects achieved by the present apparatus embodiment are also the same as those achieved by the above method embodiments.
Embodiments of the present invention also provide a computer-readable storage medium, in which a processor-executable program is stored, and the processor-executable program is used for executing the above-mentioned power system power generation side standby resource scheduling method when executed by a processor.
The computer-readable storage medium of the embodiment of the invention can execute the method for scheduling the standby resources on the power generation side of the power system provided by the embodiment of the method of the invention, can execute any combination of the implementation steps of the embodiment of the method, and has corresponding functions and beneficial effects of the method.
The embodiment of the invention also discloses a computer program product or a computer program, which comprises computer instructions, and the computer instructions are stored in a computer readable storage medium. The computer instructions may be read by a processor of a computer device from a computer-readable storage medium, and executed by the processor to cause the computer device to perform the method illustrated in fig. 1.
In alternative embodiments, the functions/acts noted in the block diagrams may occur out of the order noted in the operational illustrations. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality/acts involved. Furthermore, the embodiments presented and described in the flow charts of the present invention are provided by way of example in order to provide a more thorough understanding of the technology. The disclosed methods are not limited to the operations and logic flows presented herein. Alternative embodiments are contemplated in which the order of various operations is changed, and in which sub-operations described as part of larger operations are performed independently.
Furthermore, although the present invention is described in the context of functional modules, it should be understood that, unless otherwise stated to the contrary, one or more of the above-described functions and/or features may be integrated in a single physical device and/or software module, or one or more of the functions and/or features may be implemented in a separate physical device or software module. It will also be appreciated that a detailed discussion of the actual implementation of each module is not necessary for an understanding of the present invention. Rather, the actual implementation of the various functional modules in the apparatus disclosed herein will be understood within the ordinary skill of an engineer, given the nature, function, and internal relationship of the modules. Accordingly, those skilled in the art can, using ordinary skill, practice the invention as set forth in the claims without undue experimentation. It is also to be understood that the specific concepts disclosed are merely illustrative of and not intended to limit the scope of the invention, which is defined by the appended claims and their full scope of equivalents.
The above functions, if implemented in the form of software functional units and sold or used as a separate product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the above method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, and various media capable of storing program codes.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Further, the computer readable medium could even be paper or another suitable medium upon which the above described program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the foregoing description of the specification, reference to the description of "one embodiment/example," "another embodiment/example," or "certain embodiments/examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A power system power generation side standby resource scheduling method is characterized by comprising the following steps:
acquiring resource characteristic parameters of generator sets at the power generation side of a power system;
determining a first generator set for providing a fast standby resource, a second generator set for providing a slow standby resource and a third generator set for providing a short-term standby resource according to the resource characteristic parameters, and determining a fast standby resource capacity, a slow standby resource capacity and a short-term standby resource capacity;
determining a fast standby requirement, a slow standby requirement, and a short-term standby requirement of a power system;
scheduling the standby resources on the power generation side of the power system according to the capacity of the fast standby resources, the capacity of the slow standby resources, the capacity of the short-term standby resources, the fast standby demand, the slow standby demand and the short-term standby demand;
the step of scheduling the backup resources on the power generation side of the power system according to the fast backup resource capacity, the slow backup resource capacity, the short-term backup resource capacity, the fast backup demand, the slow backup demand, and the short-term backup demand specifically includes:
respectively calculating the upward fast standby resource capacity and the downward fast standby resource capacity of the first generator set, the upward slow standby resource capacity and the downward slow standby resource capacity of the second generator set and the upward short-term standby resource capacity and the downward short-term standby resource capacity of the third generator set;
considering the influence of the cascade power station, and adjusting the standby resources of the cascade power station;
respectively summarizing the capacity of the fast standby resources, the capacity of the slow standby resources and the capacity of the short-term standby resources according to the general dispatching units of each province and each region to obtain the statistics of the standby resources in a first province;
considering intra-provincial power transmission channel capacity limit, and adjusting the first intra-provincial standby resource statistic to obtain a second intra-provincial standby resource statistic;
and calculating an inter-provincial supportable reserve capacity limit according to the second intra-provincial reserve resource statistic, the fast reserve demand, the slow reserve demand, the short-term reserve demand and the transmission capacity of an inter-provincial communication channel, and scheduling the power system power generation side reserve resources according to the inter-provincial supportable reserve capacity limit.
2. The power system power generation side standby resource scheduling method according to claim 1, characterized in that: the resource characteristic parameters include a power regulation speed, an average climbing speed, a power generation duration time, and a state transition time.
3. The power system power generation side standby resource scheduling method according to claim 1, characterized in that: the fast standby resource is used for tertiary frequency modulation, resetting AGC adjustment and first accident standby, the slow standby resource is used for wind power climbing, load climbing and second accident standby, and the short standby resource is used for unplanned short-time peak shaving.
4. The power system power generation side standby resource scheduling method according to claim 1, characterized in that: the first generator set comprises a hydroelectric generating set with adjusting capacity, a single-cycle gas turbine, a coal-fired set in an operating state, a part of the adjusting capacity of a combined cycle gas set, which does not exceed 20% of rated capacity, and a pumped storage power station in a starting state, the second generator set comprises a coal-fired set in an operating state, a part of the adjusting capacity of the combined cycle gas set, which exceeds 20% of rated capacity, a pumped storage power station in a shutdown state or a reverse operation state, and a single-cycle gas turbine in a shutdown state, and the third generator set comprises a combined cycle gas set which can be started up in a hot mode.
5. The method according to claim 1, wherein the step of determining the fast standby requirement, the slow standby requirement and the short-term standby requirement of the power system specifically comprises:
determining an accident standby requirement, and determining the rapid standby requirement according to a prediction error of a maximum load within 30 minutes from the current moment, a prediction error of the sum of the power generation power of the total provincial new energy in the first current time period and the accident standby requirement;
determining the slow standby demand according to a prediction error of a maximum load within 1 hour from the current moment, a prediction error of the sum of the power generation power of the total province new energy in a second current time period, the accident standby demand and the fast standby demand;
and determining the short-term standby demand according to the prediction error of the maximum load within 2 hours from the current moment, the prediction error of the sum of the third current time period total provincial new energy power generation, the accident standby demand, the fast standby demand and the slow standby demand.
6. The power system generation side backup resource scheduling method according to claim 5, wherein the emergency backup requirement is a maximum of: the maximum planned power of a single generator in province, the maximum generated power of a single wind power plant in province and the maximum power loss caused by direct current single-click failure.
7. A power system power generation side standby resource scheduling system, comprising:
the first acquisition module is used for acquiring resource characteristic parameters of each generator set at the power generation side of the power system;
the standby resource capacity determining module is used for determining a first generator set used for providing the fast standby resource, a second generator set used for providing the slow standby resource and a third generator set used for providing the short-term standby resource according to the resource characteristic parameters, and determining the fast standby resource capacity, the slow standby resource capacity and the short-term standby resource capacity;
a backup demand determination module for determining a fast backup demand, a slow backup demand, and a short-term backup demand of the power system;
the standby resource scheduling module is used for scheduling the standby resources on the power generation side of the power system according to the fast standby resource capacity, the slow standby resource capacity, the short-term standby resource capacity, the fast standby requirement, the slow standby requirement and the short-term standby requirement;
the standby resource scheduling module is specifically configured to:
respectively calculating the upward fast standby resource capacity and the downward fast standby resource capacity of a first generator set, the upward slow standby resource capacity and the downward slow standby resource capacity of a second generator set and the upward short-term standby resource capacity and the downward short-term standby resource capacity of a third generator set;
considering the influence of the cascade power station, and adjusting the standby resources of the cascade power station;
respectively summarizing the capacity of the fast standby resources, the capacity of the slow standby resources and the capacity of the short-term standby resources according to the general dispatching units of each province and each region to obtain the statistics of the standby resources in a first province;
considering intra-provincial power transmission channel capacity limitation, and adjusting the first intra-provincial standby resource statistic to obtain a second intra-provincial standby resource statistic;
and calculating an inter-provincial supportable reserve capacity limit according to the second intra-provincial reserve resource statistic, the fast reserve demand, the slow reserve demand, the short-term reserve demand and the transmission capacity of an inter-provincial communication channel, and scheduling the power system power generation side reserve resources according to the inter-provincial supportable reserve capacity limit.
8. A power system power generation side standby resource scheduling device, comprising:
at least one processor;
at least one memory for storing at least one program;
when executed by the at least one processor, cause the at least one processor to implement a power system generation side backup resource scheduling method according to any of claims 1 to 6.
9. A computer readable storage medium in which a processor executable program is stored, wherein the processor executable program when executed by a processor is adapted to perform a power system power generation side backup resource scheduling method according to any of claims 1 to 6.
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