CN114825467A - Thermal power generating unit annual maintenance plan standby adequacy evaluation method and system - Google Patents
Thermal power generating unit annual maintenance plan standby adequacy evaluation method and system Download PDFInfo
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- CN114825467A CN114825467A CN202210620524.5A CN202210620524A CN114825467A CN 114825467 A CN114825467 A CN 114825467A CN 202210620524 A CN202210620524 A CN 202210620524A CN 114825467 A CN114825467 A CN 114825467A
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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
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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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
- H02J3/003—Load forecast, e.g. methods or systems for forecasting future load demand
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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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
- H02J3/144—Demand-response operation of the power transmission or distribution network
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Abstract
The invention discloses a method and a system for evaluating the spare adequacy of an annual overhaul plan of a thermal power generating unit, wherein the method comprises the following steps of: predicting and obtaining the maximum load of a power grid to be subjected to standby adequacy evaluation in ten days, and calculating and obtaining the capacity of the running grid-connected coal-electric machine set based on the maximum load; calculating to obtain the overhaul reserve capacity and calculating to obtain the overhaul capacity time of the coal-electric unit all the year round; calculating and obtaining the capacity time required by the annual coal electric unit maintenance based on the capacity of the grid-connected coal electric unit; and calculating to obtain the overhaul capacity time occupancy rate based on the overhaul capacity time of the annual coal electric unit and the capacity time required by overhaul of the annual coal electric unit, and obtaining an evaluation result based on the overhaul capacity time occupancy rate and a preset evaluation criterion. The method disclosed by the invention has low dependence on load prediction precision and future topological morphology of the power grid, and can well solve the technical problem of preparation of power grid adequacy evaluation data on medium and long-term scales.
Description
Technical Field
The invention belongs to the field of power systems and automation thereof, and particularly relates to a method and a system for evaluating the reserve adequacy of an annual overhaul plan of a thermal power generating unit.
Background
At present, a clean, low-carbon, safe and efficient modern electric power energy system is constructed, and is an important way for realizing energy transformation; under the aim of 'double carbon', the explosive growth and large-scale grid connection of new energy become great trend, and the new energy is converted into a high-proportion new energy power system based on the conventional fossil energy power system; meanwhile, the coal-fired thermal power is still ballast stone of electric energy, is the foundation of power grid stability, has the generating capacity accounting for about 56 percent, and plays an indispensable role in the aspects of stability, safety and livelihood preservation of the coal-fired thermal power on the road for realizing the double-carbon target and energy transformation.
Annual and monthly maintenance schedule arrangement of the coal-fired thermal power generating unit can influence the reserve capacity adequacy of the power grid, the reserve capacity adequacy of the power grid under the medium-term and long-term maintenance schedule of the coal-fired thermal power generating unit is evaluated, the influence of maintenance of the coal-fired thermal power generating unit on the operation of the power grid can be reduced, and the safety of the power grid is guaranteed. On one hand, the existing power grid spare capacity adequacy evaluation does not distinguish power supply types, on the other hand, the existing power grid spare capacity adequacy evaluation is mostly based on short-term load conditions, and indexes of the existing power grid spare capacity adequacy evaluation are based on overhaul probabilities, such as overhaul spare capacity insufficiency probability and overhaul spare capacity insufficiency expected value. The method for the reserve adequacy of the power grid of the thermal power unit maintenance plan on the medium-long scale is researched, meanwhile, on the medium-long scale, the load prediction precision is poor, the future topological form and the power flow distribution of the power grid are uncertain, the calculation of the reserve adequacy of the power grid of the medium-long scale by short-term evaluation indexes is invalid, and the difficulty is brought to the reserve adequacy evaluation of the power grid.
Disclosure of Invention
The invention aims to provide a method and a system for evaluating the spare adequacy of an annual overhaul plan of a thermal power generating unit, so as to solve one or more technical problems. The method disclosed by the invention has low dependence on load prediction precision and future topological morphology of the power grid, and can well solve the technical problem of preparation of power grid adequacy evaluation data on medium and long-term scales.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a method for evaluating the spare adequacy of an annual overhaul plan of a thermal power generating unit, which comprises the following steps of:
predicting and obtaining the maximum load of a power grid to be subjected to standby adequacy evaluation in ten days, and calculating and obtaining the capacity of the running grid-connected coal-electric machine set based on the maximum load;
calculating to obtain the overhaul reserve capacity based on the capacity of the grid-connected coal-electric unit and the preset capacity of the temporary overhaul coal-electric unit, and calculating to obtain the overhaul capacity time of the annual coal-electric unit based on the overhaul reserve capacity;
calculating and obtaining the capacity time required by the annual coal electric unit maintenance based on the capacity of the grid-connected coal electric unit;
and calculating to obtain the overhaul capacity time occupancy rate based on the overhaul capacity time of the annual coal electric unit and the capacity time required by overhaul of the annual coal electric unit, and obtaining an evaluation result based on the overhaul capacity time occupancy rate and a preset evaluation criterion.
The method of the invention is further improved in that the last ten days are specifically 36 ten days divided in the whole year;
the maximum load of the power grid to be subjected to standby adequacy evaluation is obtained by prediction in ten days, and the capacity of the running grid-connected coal-electric machine set is obtained by calculation based on the maximum load:
the calculation expression of the capacity of the grid-connected coal-electricity unit is that the capacity of the grid-connected coal-electricity unit is the power generation capacity/(1-coal-electricity average resistivity) required by the coal-electricity unit; the power generation capacity required to be provided by the coal-electric unit is maximum load + operation standby capacity-maximum power generation capacity of the hydroelectric unit-maximum power generation capacity of the nuclear power unit-new energy power generation capacity-maximum gas power generation capacity-annual medium and long-term trading power receiving power.
The method of the invention is further improved in that the overhaul reserve capacity is obtained by calculation based on the capacity of the grid-connected coal electric unit and the preset capacity of the temporary overhaul coal electric unit, the overhaul reserve capacity time of the annual coal electric unit is obtained by calculation based on the overhaul reserve capacity,
the calculation expression of the overhaul reserve capacity is that the overhaul reserve capacity is coal electric machine-grid-connected coal electric machine set capacity-coal electric machine set capacity which is just overhauled and eliminated;
the calculation expression of the overhauling capacity time of the annual coal electric unit is that the overhauling capacity time of the annual coal electric unit is equal to overhauling reserve capacity multiplied by days in an overhauling time period; and determining the overhaul standby capacity in the overhaul time period according to the overhaul standby capacity and the overhaul time period and the non-overhaul window of the coal-electric machine set in ten days.
The method is further improved in that the step of obtaining the capacity time required by annual coal electric unit overhaul based on the grid-connected coal electric unit capacity calculation specifically comprises the following steps:
and calculating and obtaining the capacity time required by the annual coal-electric unit overhaul based on the capacity of the grid-connected coal-electric unit according to the coal-fired thermal power generation enterprise equipment overhaul guide.
A further development of the method according to the invention is that the predetermined evaluation criterion is expressed as,
| time occupancy rate of repair capacity | Maintenance standby |
| Time occupancy rate of overhaul capacity is more than 1 | Deficiency of |
| Time occupancy rate of 0.7 < overhaul capacity < 1 | Biased tight |
| Time occupancy rate of overhaul capacity is less than 0.7 | Sufficient for |
。
The method of the invention is further improved in that the overhaul capacity time occupancy rate is obtained by calculating based on the overhaul capacity time of the annual coal-electric unit and the capacity time required by the annual coal-electric unit overhaul,
and the calculation expression of the overhaul capacity time occupancy is that the overhaul capacity time occupancy is the capacity time required by the overhaul of the annual coal electric unit/the overhaulable capacity time of the annual coal electric unit.
The invention provides a thermal power generating unit annual maintenance plan reserve adequacy evaluation system in a second aspect, which comprises:
the system comprises a grid-connected coal electric unit capacity acquisition module, a grid-connected coal electric unit capacity acquisition module and a standby adequacy evaluation module, wherein the grid-connected coal electric unit capacity acquisition module is used for predicting and acquiring the maximum load of a power grid to be subjected to standby adequacy evaluation in ten days and calculating and acquiring the capacity of an operating grid-connected coal electric unit based on the maximum load;
the all-year-round coal electric unit overhauling capacity time obtaining module is used for obtaining overhauling reserve capacity through calculation based on the capacity of the grid-connected coal electric unit and preset temporary overhauling coal electric unit capacity, and obtaining the all-year-round coal electric unit overhauling capacity time through calculation based on the overhauling reserve capacity;
the system comprises a module for acquiring the capacity time required by the annual coal electric set for overhaul, and a module for acquiring the capacity time required by the annual coal electric set for overhaul by calculation based on the capacity of the grid-connected coal electric set;
and the evaluation result acquisition module is used for calculating and acquiring the overhaul capacity time occupancy rate based on the overhaul capacity time of the annual coal electric unit and the capacity time required by overhaul of the annual coal electric unit, and acquiring an evaluation result based on the overhaul capacity time occupancy rate and a preset evaluation criterion.
The system of the invention is further improved in that the annual coal electric set overhaul capacity time acquisition module is specifically used for calculating and acquiring overhaul reserve capacity based on the capacity of the grid-connected coal electric set and the preset capacity of the temporary overhaul coal electric set, calculating and acquiring annual coal electric set overhaul capacity time based on the overhaul reserve capacity,
the calculation expression of the overhaul reserve capacity is that the overhaul reserve capacity is coal electric machine-grid-connected coal electric machine set capacity-coal electric machine set capacity which is just overhauled and eliminated;
the calculation expression of the overhauling capacity time of the annual coal electric unit is that the overhauling capacity time of the annual coal electric unit is equal to overhauling reserve capacity multiplied by days in an overhauling time period; and the overhaul standby capacity in the overhaul time interval is determined according to the overhaul standby capacity, the overhaul time interval of the coal electric unit set in ten days and a non-overhaul window.
A further development of the system according to the invention is that the predetermined evaluation criterion is expressed as,
| time occupancy of service capacity | Maintenance standby |
| Time occupancy rate of overhaul capacity is more than 1 | Deficiency of |
| Time occupancy rate of 0.7 < overhaul capacity < 1 | Biased tight |
| Time occupancy rate of overhaul capacity is less than 0.7 | Sufficient (sufficient) |
。
The system of the invention is further improved in that the evaluation result acquisition module is specifically used for calculating and acquiring the occupancy rate of the overhaul capacity time based on the overhaul capacity time of the annual coal electric unit and the capacity time required by the annual coal electric unit for overhaul,
and the calculation expression of the overhaul capacity time occupancy is that the overhaul capacity time occupancy is the capacity time required by the overhaul of the annual coal electric unit/the overhaulable capacity time of the annual coal electric unit.
Compared with the prior art, the invention has the following beneficial effects:
the method for evaluating the reserve adequacy of the medium-and-long-term maintenance plan of the coal-fired thermal power generating unit adopts the maintenance capacity time occupancy rate index to indirectly evaluate the reserve adequacy of the medium-and-long-term maintenance power grid of the coal-fired thermal power generating unit, the required data precision and data content of the evaluation method are easy to obtain, and the evaluation method has good operability on medium-and-long-term scales; meanwhile, the medium-term and long-term maintenance planning of the coal-fired thermal power generating unit can be well guided on the granularity of the evaluation result, and the influence of the thermal power generating unit on a power grid due to maintenance is reduced. In conclusion, the method provided by the invention has low dependence on load prediction precision and the future topological form of the power grid, can solve the problem of data preparation for evaluating the adequacy of the power grid on a medium-long scale, and can be suitable for evaluating the spare adequacy of a medium-long term maintenance plan of a coal-fired thermal power generating unit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art are briefly introduced below; it is obvious that the drawings in the following description are some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic flow chart of a method for evaluating the spare adequacy of an annual overhaul plan of a thermal power generating unit according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a method for evaluating the spare adequacy of an annual overhaul plan of a thermal power generating unit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a framework of a power grid backup adequacy evaluation system according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
example one
Referring to fig. 1, a method for evaluating the spare adequacy of an annual overhaul plan of a thermal power generating unit, in particular to a method suitable for evaluating the spare adequacy of a medium-term and long-term overhaul plan of a coal-fired thermal power generating unit, according to an embodiment of the present invention, includes the following steps:
predicting and obtaining the maximum load of a power grid, the maximum power generation capacity of a hydroelectric generating set, the maximum power generation capacity of a nuclear generating set and the maximum power generation capacity of gas to be evaluated by spare adequacy in ten days, and calculating the installed capacity of the coal-electric generating set to be connected to the power grid based on the obtained data and the condition of long-term trade received power in the year; the calculation formula of the installed capacity of the coal electric machine unit needing grid connection is as follows: the installed capacity of the coal-electric machine set which needs to be connected in a grid is (the predicted maximum load + the running standby capacity-the maximum power generation capacity of the water-electric machine set-the maximum power generation capacity of the nuclear power machine set-the maximum power generation capacity of new energy-the maximum power generation capacity of gas-long-term trade received power in the year)/(1-average coal-electric resistivity);
calculating to obtain overhaul reserve capacity based on the capacity of the required grid-connected coal electric unit, the coal electric installed capacity and the installed capacity of the coal electric unit which is just before overhaul and is in shortage, and calculating to obtain the overhaul capacity time of the coal electric unit all the year based on the overhaul reserve capacity;
based on the installed capacity of coal and electricity, calculating and obtaining the capacity time required by the annual coal and electricity unit overhaul according to relevant guide rules of the coal-fired thermal power unit;
calculating to obtain the overhaul capacity time occupancy rate based on the overhaul capacity time of the annual coal electric unit and the capacity time required by overhaul of the annual coal electric unit, and obtaining an evaluation result based on the overhaul capacity time occupancy rate; and the overhaul capacity time occupancy rate is the capacity time required by overhaul of the annual coal electric unit/the overhaulable capacity time of the annual coal electric unit.
The exemplary optional step of the embodiment of the present invention includes that the maximum load of the power grid to be subjected to the reserve adequacy assessment is obtained by prediction in ten days, and the step of obtaining the capacity of the running grid-connected coal electric unit required to be operated based on the obtained maximum load calculation specifically includes: predicting and acquiring the maximum load of the power grid to be reserved and fully evaluating the power grid in ten days, and after reasonably arranging the running reserve capacity according to relevant regulations, deducting the hydroelectric power, nuclear power, new energy and gas power generation capacity, calculating the capacity of a coal-electric unit which needs to run; illustratively, the percentage of the capacity of the coal-electric machine set which is repaired in recent three years is combined, so that the repairable capacity time (kilowatt-day) of the coal-electric machine set in the whole year is obtained.
As further explained in the embodiments of the present invention, the whole year is divided into 36 ten days, and the maximum load in each ten day is respectively predicted and used as the power supply requirement to be guaranteed for compiling the unit maintenance plan; forecasting the maximum generating capacity and the consumption demand of the hydroelectric generating set in ten days, and arranging a hydroelectric generating set maintenance plan according to the principle that the hydropower consumption in the flood season is not influenced; arranging the maximum power generation capacity of the nuclear power unit in ten days, and arranging a maintenance plan considering the nuclear power refueling period and the maintenance requirement; predicting the new energy generating capacity in ten days, the embodiment of the invention discloses an exemplary reference method which comprises the following steps: (1) new energy output at 80% -90% of guarantee rate in the peak load period, (2) minimum generated power of recent three-year calendar history, and (3) predicted generated power considering the average concurrence rate in the peak load period in recent history; the annual medium-long term transaction is used as the receiving power (the receiving is positive); the gas turbine set can set a starting proportion coefficient and an average gas resistance rate of the gas turbine in consideration of influences of natural gas supply, blockage and the like in different periods of the whole year, wherein the starting capacity is installed capacity multiplied by starting proportion, and the maximum power generation capacity is started capacity multiplied (1-average gas blockage).
Calculating the power generation capacity required to be provided by the coal-electric unit, wherein the power generation capacity is equal to the predicted maximum load + the running reserve capacity-the maximum power generation capacity of the hydroelectric unit-the maximum power generation capacity of the nuclear power unit-the new energy power generation capacity-the maximum power generation capacity of the fuel gas-the long-term trade received power in the year;
calculating the installed capacity of the coal-electricity unit needing to be connected to the grid, wherein the installed capacity is equal to the power generation capacity/(1-coal-electricity average resistivity) required to be provided by the coal-electricity unit;
calculating the installed capacity of the coal-electric machine set which is just repaired and is lacking; exemplary reference methods: (1) the percentage of the installed capacity of the coal-shortage motor assembly to the total installed capacity is repaired and consumed according to the near three years; (2) set according to experience.
Calculating the spare capacity for maintenance; the overhaul reserve capacity is the coal power unit installed capacity, the coal power unit installed capacity needing to be connected to the grid, and the coal power unit installed capacity which is just lacking in overhaul. Preferably, in order to guarantee the power supply capacity during peak load in winter and summer, the coal electric unit overhauling time period and the non-overhauling window are arranged in ten days (no coal electric unit is arranged to be overhauled even if balance is surplus in the non-overhauling window).
And (4) calculating the overhauling capacity time (kilowatt-day) of the coal electric unit all the year, wherein the overhauling capacity time is equal to the overhauling reserve capacity multiplied by days in the overhauling time period.
The core invention points of the method provided by the embodiment of the invention comprise:
firstly, the reserve adequacy of consideration electric wire netting that can be fine on medium and long-term yardstick ensures the electric wire netting safe operation: the reserve capacity is one of the guarantees of power grid operation, and under the uncertain factors such as new energy, electric power market, the abundance of reserve capacity is increasingly important to the power grid safety. Compared with the conventional standby adequacy evaluation method, the method can extend the evaluation time scale to the year, and the general adequacy evaluation is only the time scale of the day and the week. The abundant reserve capacity can guarantee the reliable supply of the power under various random and unstable factors.
Compared with the conventional method for evaluating the spare adequacy of the coal-fired thermal power plant, the method for evaluating the spare adequacy of the coal-fired thermal power plant has the advantages that the evaluation and implementation feasibility is high, and the data acquisition is relatively simple and accurate.
Thirdly, the coal-fired thermal power unit is overhauled and arranged: at present, as ballast stone for electric power operation, the maintenance of a coal-fired thermal power unit influences the capacity of a power grid, and the reasonability evaluation of the maintenance planning of the coal-fired thermal power unit considering the spare abundance can well guide the medium-term and long-term maintenance planning of the coal-fired thermal power unit.
In the embodiment of the invention, the step of acquiring the capacity time required by annual coal-electric machine set overhaul specifically comprises the following steps: the guide rule for the overhaul of the equipment of coal-fired thermal power generation enterprises (DL/T838 and 2017) stipulates that the overhaul interval of the unit A grade is 5-7 years, and between two overhauls of the A grade, C grade overhaul is preferably carried out every 1-2 years, and the overhaul can be adjusted to B, D grade according to the situation. According to the requirement, the coal-fired thermal power generating unit is sequentially set to be arranged with A-level overhaul every 6 years, and B, C, D-level overhauls are respectively arranged in the period. The maintenance sequence is circulated in turn year by year as follows: the repair period of the coal-fired thermal power unit obtained by the steps of A repair, C repair, B repair and D repair is 6 years at the A, D level, 3 years at the B, C level, and the repair period and the days are shown in the table 1.
TABLE 1 coal-fired thermal power generating unit overhaul period and days
And calculating the average annual required overhaul capacity time of each unit, wherein the average annual required overhaul capacity time is equal to the installed capacity (A-level overhaul days/A-level overhaul period + B-level overhaul days/B-level overhaul period + C-level overhaul days/C-level overhaul period + D-level overhaul days/D-level overhaul period).
The evaluation criteria in the embodiment of the present invention are shown in table 2, and are defined as follows: and the overhaul capacity time occupancy rate is the capacity time required by overhaul of the coal electric unit in the whole year/the overhaulable capacity time of the coal electric unit in the whole year.
TABLE 2 evaluation criteria
| Time occupancy of service capacity | Maintenance standby |
| Time occupancy rate of overhaul capacity is more than 1 | Deficiency of |
| Time occupancy rate of 0.7 < overhaul capacity < 1 | Biased tight |
| Time occupancy rate of overhaul capacity is less than 0.7 | Sufficient (sufficient) |
According to the method for evaluating the reserve adequacy of the medium-and-long-term maintenance plan of the coal-fired thermal power generating unit, provided by the embodiment of the invention, the reserve adequacy of the medium-and-long-term maintenance power grid of the coal-fired thermal power generating unit is indirectly evaluated by adopting the maintenance capacity time occupancy rate index, the required data precision and the data content of the evaluation method are easy to obtain, good operability is achieved on a medium-and-long-term scale, meanwhile, the medium-and-long-term maintenance plan arrangement of the coal-fired thermal power generating unit can be well guided on the evaluation result granularity, and the influence of maintenance of the thermal power generating unit on the power grid is reduced.
The following are embodiments of the apparatus of the present invention that may be used to perform embodiments of the method of the present invention. For details of non-careless mistakes in the embodiment of the apparatus, please refer to the embodiment of the method of the present invention.
Example two
In another embodiment of the present invention, a system for evaluating a reserve adequacy of a power grid is provided, which includes:
the system comprises a grid-connected coal electric unit capacity acquisition module, a grid-connected coal electric unit capacity acquisition module and a standby adequacy evaluation module, wherein the grid-connected coal electric unit capacity acquisition module is used for predicting and acquiring the maximum load of a power grid to be evaluated by the standby adequacy in ten days and calculating and acquiring the capacity of an operating grid-connected coal electric unit based on the maximum load;
the all-year-round coal electric unit overhauling capacity time obtaining module is used for obtaining overhauling reserve capacity through calculation based on the capacity of the grid-connected coal electric unit and preset temporary overhauling coal electric unit capacity, and obtaining the all-year-round coal electric unit overhauling capacity time through calculation based on the overhauling reserve capacity;
the system comprises a module for acquiring the capacity time required by the annual coal electric set for overhaul, and a module for acquiring the capacity time required by the annual coal electric set for overhaul by calculation based on the capacity of the grid-connected coal electric set;
the evaluation result acquisition module is used for calculating and obtaining the overhaul capacity time occupancy rate based on the overhaul capacity time of the annual coal electric unit and the capacity time required by overhaul of the annual coal electric unit, and obtaining an evaluation result based on the overhaul capacity time occupancy rate and a preset evaluation criterion; the calculation expression of the overhaul capacity time occupancy is that the overhaul capacity time occupancy is the capacity time required by the overhaul of the annual coal electric unit/the overhaulable capacity time of the annual coal electric unit.
EXAMPLE III
In yet another embodiment of the present invention, a computer device is provided that includes a processor and a memory for storing a computer program comprising program instructions, the processor for executing the program instructions stored by the computer storage medium. The Processor may be a Central Processing Unit (CPU), or may be other general-purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable gate array (FPGA) or other Programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, etc., which is a computing core and a control core of the terminal, and is specifically adapted to load and execute one or more instructions in a computer storage medium to implement a corresponding method flow or a corresponding function; the processor provided by the embodiment of the invention can be used for operating the thermal power generating unit annual overhaul plan standby adequacy evaluation method.
In yet another embodiment of the present invention, the present invention further provides a storage medium, specifically a computer-readable storage medium (Memory), which is a Memory device in a computer device and is used for storing programs and data. It is understood that the computer readable storage medium herein can include both built-in storage media in the computer device and, of course, extended storage media supported by the computer device. The computer-readable storage medium provides a storage space storing an operating system of the terminal. Also, one or more instructions, which may be one or more computer programs (including program code), are stored in the memory space and are adapted to be loaded and executed by the processor. It should be noted that the computer-readable storage medium may be a high-speed RAM memory, or may be a non-volatile memory (non-volatile memory), such as at least one disk memory. One or more instructions stored in the computer-readable storage medium may be loaded and executed by the processor to implement the corresponding steps of the method for evaluating the reserve adequacy of the annual overhaul plan of the thermal power generating unit in the above embodiments.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. A standby adequacy evaluation method for an annual overhaul plan of a thermal power generating unit is characterized by comprising the following steps of:
predicting and obtaining the maximum load of a power grid to be subjected to standby adequacy evaluation in ten days, and calculating and obtaining the capacity of the running grid-connected coal-electric machine set based on the maximum load;
calculating to obtain the overhaul reserve capacity based on the capacity of the grid-connected coal-electric unit and the preset capacity of the temporary overhaul coal-electric unit, and calculating to obtain the overhaul capacity time of the annual coal-electric unit based on the overhaul reserve capacity;
calculating and obtaining the capacity time required by the annual coal electric unit maintenance based on the capacity of the grid-connected coal electric unit;
and calculating to obtain the overhaul capacity time occupancy rate based on the overhaul capacity time of the annual coal electric unit and the capacity time required by overhaul of the annual coal electric unit, and obtaining an evaluation result based on the overhaul capacity time occupancy rate and a preset evaluation criterion.
2. The method for evaluating the spare adequacy of the annual overhaul plan of the thermal power generating unit according to claim 1, wherein the last ten days are divided into 36 ten days in the whole year;
and predicting and obtaining the maximum load of the power grid to be subjected to standby adequacy evaluation in ten days, and calculating and obtaining the capacity of the running grid-connected coal-electric machine set based on the maximum load:
the calculation expression of the capacity of the grid-connected coal-electricity unit is that the capacity of the grid-connected coal-electricity unit is the power generation capacity/(1-coal-electricity average resistivity) required by the coal-electricity unit; the power generation capacity required to be provided by the coal-electric unit is maximum load + operation standby capacity-maximum power generation capacity of the hydroelectric unit-maximum power generation capacity of the nuclear power unit-new energy power generation capacity-maximum gas power generation capacity-annual medium and long-term trading power receiving power.
3. The thermal power generating unit annual overhaul plan reserve adequacy assessment method according to claim 1, wherein in the overhaul reserve capacity time obtained by calculation based on the grid-connected coal electric unit capacity and the preset temporary overhaul coal electric unit capacity, the coal electric unit annual overhaul capacity is calculated based on the overhaul reserve capacity,
the calculation expression of the overhaul reserve capacity is that the overhaul reserve capacity is coal electric machine-grid-connected coal electric machine set capacity-coal electric machine set capacity which is just overhauled and eliminated;
the calculation expression of the overhauling capacity time of the annual coal electric unit is that the overhauling capacity time of the annual coal electric unit is equal to overhauling reserve capacity multiplied by days in an overhauling time period; and the overhaul standby capacity in the overhaul time interval is determined according to the overhaul standby capacity, the overhaul time interval of the coal electric unit set in ten days and a non-overhaul window.
4. The thermal power generating unit annual overhaul plan reserve adequacy evaluation method according to claim 1, wherein the step of obtaining the capacity time required for annual coal electric unit overhaul based on the grid-connected coal electric unit capacity calculation specifically comprises:
and calculating and obtaining the capacity time required by the annual coal-electric unit overhaul based on the capacity of the grid-connected coal-electric unit according to the coal-fired thermal power generation enterprise equipment overhaul guide.
5. The thermal power generating unit annual overhaul plan reserve adequacy assessment method according to claim 1, wherein the preset assessment criterion is expressed as, time occupancy of service capacity
Maintenance standby
Time occupancy rate of overhaul capacity is more than 1
Deficiency of
Time occupancy rate of 0.7 < overhaul capacity < 1
Biased tight
Time occupancy rate of overhaul capacity is less than 0.7
Sufficient (sufficient)
。
6. The thermal power generating unit annual overhaul plan reserve adequacy assessment method according to claim 1, wherein the overhaul capacity time occupancy is obtained by calculation based on the annual coal electric unit overhaulable capacity time and the annual coal electric unit overhaul required capacity time,
and the calculation expression of the overhaul capacity time occupancy is that the overhaul capacity time occupancy is the capacity time required by the overhaul of the annual coal electric unit/the overhaulable capacity time of the annual coal electric unit.
7. The utility model provides a spare abundance evaluation system of thermal power unit annual overhaul plan which characterized in that includes:
the system comprises a grid-connected coal electric unit capacity acquisition module, a grid-connected coal electric unit capacity acquisition module and a standby adequacy evaluation module, wherein the grid-connected coal electric unit capacity acquisition module is used for predicting and acquiring the maximum load of a power grid to be subjected to standby adequacy evaluation in ten days and calculating and acquiring the capacity of an operating grid-connected coal electric unit based on the maximum load;
the all-year-round coal electric unit overhauling capacity time obtaining module is used for obtaining overhauling reserve capacity through calculation based on the capacity of the grid-connected coal electric unit and preset temporary overhauling coal electric unit capacity, and obtaining the all-year-round coal electric unit overhauling capacity time through calculation based on the overhauling reserve capacity;
the system comprises a module for acquiring the capacity time required by the annual coal electric set for overhaul, and a module for acquiring the capacity time required by the annual coal electric set for overhaul by calculation based on the capacity of the grid-connected coal electric set;
and the evaluation result acquisition module is used for calculating and acquiring the overhaul capacity time occupancy rate based on the overhaul capacity time of the annual coal electric unit and the capacity time required by overhaul of the annual coal electric unit, and acquiring an evaluation result based on the overhaul capacity time occupancy rate and a preset evaluation criterion.
8. The system for evaluating the annual overhaul plan reserve adequacy of a thermal power generating unit according to claim 7, wherein the annual coal power unit overhaulable capacity time acquisition module is specifically configured to calculate and obtain overhauled reserve capacity based on the grid-connected coal power unit capacity and a preset temporary overhauled coal power unit capacity, calculate and obtain annual coal power unit overhaulable capacity time based on the overhauled reserve capacity,
the calculation expression of the overhaul reserve capacity is that the overhaul reserve capacity is coal power machine-grid-connected coal power unit capacity-coal power unit installed capacity which is just overhauled and eliminated;
the calculation expression of the overhauling capacity time of the annual coal electric unit is that the overhauling capacity time of the annual coal electric unit is equal to overhauling reserve capacity multiplied by days in an overhauling time period; and the overhaul standby capacity in the overhaul time interval is determined according to the overhaul standby capacity, the overhaul time interval of the coal electric unit set in ten days and a non-overhaul window.
9. The thermal power generating unit annual overhaul plan reserve adequacy evaluation system of claim 7, wherein the preset evaluation criteria are expressed as, time occupancy of service capacity
Maintenance standby
Time occupancy rate of overhaul capacity is more than 1
Deficiency of
Time occupancy rate of 0.7 < overhaul capacity < 1
Biased tight
Time occupancy rate of overhaul capacity is less than 0.7
Sufficient (sufficient)
。
10. The thermal power generating unit annual overhaul plan reserve adequacy evaluation system as claimed in claim 7, wherein the evaluation result obtaining module is specifically configured to calculate and obtain overhaul capacity time occupancy based on annual coal-electric unit overhaulable capacity time and annual coal-electric unit overhaul required capacity time,
and the calculation expression of the overhaul capacity time occupancy is that the overhaul capacity time occupancy is the capacity time required by the overhaul of the annual coal electric unit/the overhaulable capacity time of the annual coal electric unit.
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| CN116151807A (en) * | 2023-04-18 | 2023-05-23 | 南方电网科学研究院有限责任公司 | Method and device for determining overhauling of generator set and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116151807A (en) * | 2023-04-18 | 2023-05-23 | 南方电网科学研究院有限责任公司 | Method and device for determining overhauling of generator set and electronic equipment |
| CN116151807B (en) * | 2023-04-18 | 2023-09-08 | 南方电网科学研究院有限责任公司 | Method and device for determining overhauling of generator set and electronic equipment |
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