CN112308396A - Thermal power generating unit performance analysis grading control method - Google Patents
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Abstract
The invention discloses a thermal power generating unit performance analysis grading control method, which comprises the following steps: analyzing and calculating the actual measurement rate of the thermal power generating unit, analyzing and calculating historical data of the unit, comprehensively reflecting the actual measurement rate and the historical data of the unit performance, grading the unit, and distributing the regulating quantity. By adopting the regulating quantity distribution method, the regulating quantity of the whole network can be more reasonably shared according to the measured speed and the historical regulating speed performance of the unit. When the power grid regulation requirement changes, each unit can coordinate and share the regulation requirement according to the self regulation performance, so that the power grid is quickly and safely recovered and stabilized, and the burden of regulation and control personnel is reduced.
Description
Technical Field
The invention relates to a thermal power generating unit performance analysis grading control method.
Background
Under the current large background that global energy safety problems are outstanding and environmental pollution problems are severe, renewable energy sources such as wind power, solar power generation and hydropower are vigorously developed, and the transformation from energy production to renewable energy sources is realized, so that the method is a great demand for realizing sustainable development of China and even global energy and economy.
In a power grid, generator sets are various in types and different in performance, and are difficult to control in a unified mode, and although a traditional automatic power generation control system provides various control modes, characteristics of the generator sets in actual operation cannot be fully considered, so that the requirement of power grid dispatching operation cannot be completely met. The response time and the adjusting rate of the unit in operation can be different under different conditions, the adjusting requirement of the power grid is changed all the time, and the adjusting requirement of the unit is changed accordingly. By adopting the conventional AGC control mode at present, the situations of frequent up-and-down adjustment of the AGC command of the unit and poor performance of the output tracking command of the unit are easy to occur because the actual operation working condition of the unit is not considered. Therefore, the capacity of the unit participating in power grid regulation is restricted, and the overall control performance of the power grid is unfavorable.
Aiming at the randomness of distribution of thermal power units of the existing system, in order to improve the capacity of the thermal power units participating in regional regulation, the performance advantages of various thermal power units are fully exerted, and the thermal power units are graded according to the performance of the thermal power units, so that the thermal power units share the regulation quantity according to different gears, which is the trend.
Disclosure of Invention
The invention aims to provide a thermal power generating unit performance analysis stepping control method. By adopting the method, the whole network regulation amount can be reasonably shared according to the measured rate and the historical regulation rate performance of the unit, and the burden of regulation personnel is reduced.
In order to solve the problems in the prior art, the technical scheme adopted by the invention is as follows:
a thermal power generating unit performance analysis grading control method comprises the following steps:
counting the rising rate and the falling rate of the thermal power generating unit according to the instruction execution condition of each thermal power generating unit, and calculating the actual measurement rate of the thermal power generating unit;
calculating a unit historical adjusting rate average value reflecting the adjusting rate of the thermal power unit aiming at the historical rate statistics of the thermal power unit in the last year;
and thirdly, the measured speed and the historical data of the performance of the reaction unit are integrated to carry out grading and regulating quantity distribution on the unit.
The step (i) includes the steps of:
and respectively calculating the rising rate and the falling rate of the units according to the unit issuing command value and the unit output condition of the lower period which are issued and recorded by each thermal power unit in each command period, and further counting and analyzing the actual measurement rate of the thermal power units.
The step II comprises the following steps:
by inquiring the historical records issued by each thermal power generating unit in the last year, the historical rising regulation rate and the historical falling regulation rate of each thermal power generating unit are counted, and the regulation rate mean value of the historical regulation performance of the reaction unit is comprehensively calculated.
The third step includes the following steps:
and (4) integrating the calculated actually measured speed of the current performance of the reaction unit and the historical speed average value of the historical performance of the reaction unit, grading the units, and distributing the full-network regulating quantity to the unit where each gear is located according to the divided gears.
The third step includes the following steps:
according to the obtained comprehensive performance index regulation rate of each unit, distributing the whole network regulation quantity; when the operation condition of the power grid changes, the adjustment quantity of the whole power grid is automatically distributed, and intelligent distribution of each unit according to the performance of each unit is realized until all the total adjustment quantity is completely distributed.
The invention has the advantages and beneficial effects that:
the invention discloses a thermal power unit performance analysis grading control method which comprises the steps of analyzing and calculating the actual measurement rate of a thermal power unit, analyzing and calculating the historical data of the thermal power unit, comprehensively reflecting the actual measurement rate and the historical data of the performance of the thermal power unit, grading the thermal power unit and distributing the regulating quantity. By adopting the regulating quantity distribution method, the regulating quantity of the whole network can be more reasonably shared according to the measured speed and the historical regulating speed performance of the unit. When the power grid regulation requirement changes, each unit can coordinate and share the regulation requirement according to the self regulation performance, so that the power grid is quickly and safely recovered and stabilized, and the burden of regulation and control personnel is reduced.
Drawings
The technical scheme of the invention is further explained by combining the accompanying drawings as follows:
FIG. 1 is a schematic diagram of a flow of analyzing and calculating an actual measurement rate of a thermal power generating unit in the thermal power generating unit performance analysis and grading control method of the present invention;
FIG. 2 is a schematic diagram illustrating a flow of analyzing and calculating historical data of a thermal power generating unit in the thermal power generating unit performance analyzing and grading control method of the present invention;
fig. 3 is a schematic flow chart of the process of performing grading and adjusting quantity distribution on the adjusting rate of the comprehensive reaction unit performance in the thermal power unit performance analysis grading control method of the invention.
Detailed Description
The invention discloses a thermal power unit performance analysis grading control method which comprises the steps of thermal power unit actual measurement rate analysis and calculation, unit historical data analysis and calculation, unit grading by comprehensively reflecting the actual measurement rate and the historical data of the unit performance, and regulating quantity distribution, so that a power grid can be quickly and safely recovered and stabilized, and the burden of regulating and controlling personnel is reduced.
Specifically, the method comprises the following steps:
firstly, the control logic of the thermal power generating unit related to the existing AGC control strategy is systematically and comprehensively combed by developing the existing D5000 platform. And counting the rising rate and the falling rate of the thermal power generating unit according to the instruction execution condition of each thermal power generating unit to obtain the current actual measurement rate of the thermal power generating unit.
And secondly, calculating to obtain a unit historical adjusting rate average value reflecting the adjusting rate of the thermal power unit aiming at the historical rate statistics of the thermal power unit in the last year.
And thirdly, integrating the average value of the current regulating rate and the historical regulating rate of the thermal power generating unit, calculating a unit factor reflecting the regulating performance of the thermal power generating unit, grading the thermal power generating unit according to the calculated thermal power generating unit factor, and distributing the regulating quantity of the whole network according to the gear of the thermal power generating unit.
In actual operation, except for normal power grid equipment, the issued command is also subjected to security check so as to ensure the feasibility of transaction. Real-time control and power dispatching under safety check are inseparable, and small-scale test point tests in different time periods can be carried out at the initial stage of strategy implementation and operation, and comprehensive popularization is carried out after operation is mature. The distribution strategy of the thermal power generating unit performed under a perfect system and an intelligent system can more effectively deal with the current situation of a power grid in which the regulating quantity of the thermal power generating unit is randomly distributed.
The step (i) includes the steps of:
respectively counting the conditions of the ascending instructions and the descending instructions executed by each thermal power generating unit according to the instruction execution conditions of each thermal power generating unit, and calculating the ascending rate and the descending rate of each thermal power generating unit to obtain the current actual measurement rate of the thermal power generating unit as a real-time index reflecting the current performance of the thermal power generating unit;
the step II comprises the following steps: :
by inquiring historical data, calculating historical regulating rate average values of the thermal power generating units reflecting regulating rates of the thermal power generating units according to historical speed statistics of the thermal power generating units in the last year, and taking the historical regulating rate average values as historical indexes reflecting historical performances of the thermal power generating units as reference bases of gears of the thermal power generating units.
The third step includes the following steps:
and integrating the average value of the current regulation rate and the historical regulation rate of the thermal power generating unit, calculating a unit factor reflecting the regulation performance of the thermal power generating unit, grading the thermal power generating unit according to the calculated thermal power generating unit factor, and distributing the whole network regulation quantity according to the gear of the thermal power generating unit. According to the obtained comprehensive performance index regulation rate of each unit, distributing the whole network regulation quantity; when the operation condition of the power grid changes, the adjustment quantity of the whole power grid is automatically distributed, intelligent distribution of each unit according to the performance of each unit is realized until all the total adjustment quantity is completely distributed, and the safety and the economical efficiency of the operation of the power grid are improved.
Example (b):
comprehensively considering different operation characteristics of the power grid reflected in different months in one year in an adjusting strategy to adapt to the operation characteristics of the power grid; and the power grid operation area is divided into a stable area, an emergency area and an accident area according to division conditions. The embodiment explains that the distribution strategies are all in the range that the power grid is in the stable area, and the distribution method is not applicable when the power grid is in the emergency area or the accident area.
And meanwhile, the following conditions are met, and the power grid is considered to be operated in a stable region:
(1) the section is not out of limit and is kept below 95%, and the frequency is stabilized between 50 +/-0.1 Hz;
(2) the ACE deviation is within a stable region limit value;
(3) various power supplies have no faults, and coal supply, water regime and the like are in normal ranges;
(4) the peak and valley regulation margins of the power grid are sufficient, namely the standby is sufficient;
(5) the influence of various kinds of disaster weather or sudden events is avoided.
Referring to fig. 1, a schematic diagram of an analysis flow of an actual measurement rate of the thermoelectric generator set in the performance analysis and grading control method of the thermoelectric generator set in this embodiment is shown.
Respectively counting the conditions of the ascending instructions and the descending instructions executed by each thermal power generating unit according to the instruction execution conditions of each thermal power generating unit, and calculating the ascending rate and the descending rate of each thermal power generating unit to obtain the current actual measurement rate of the thermal power generating unit as a real-time index reflecting the current performance of the thermal power generating unit;
Vup＝(Pdes-Pcur)/Tter (1)
wherein: vupFor the rise rate, P, of the AGC unit of the master stationdesIs the target value, P, of the AGC unit of the master stationcurFor the current power, T, of the AGC unit of the master stationterAnd the instruction interval of the AGC unit of the master station.
Vdn＝(Pdes-Pcur)/Tter (2)
Wherein: vdnFor the rate of descent, P, of the AGC unit of the master stationdesIs the target value, P, of the AGC unit of the master stationcurFor the current power, T, of the AGC unit of the master stationterAnd the instruction interval of the AGC unit of the master station.
Referring to fig. 2, a schematic diagram of a process of analyzing historical data of the power generating unit in the method for analyzing performance of the power generating unit and controlling the power generating unit in a stepped manner in this embodiment is shown.
By inquiring historical data, calculating historical regulating rate average values of the thermal power generating units reflecting regulating rates of the thermal power generating units according to historical speed statistics of the thermal power generating units in the last year, and taking the historical regulating rate average values as historical indexes reflecting historical performances of the thermal power generating units as reference bases of gears of the thermal power generating units.
Vuphis＝∑Vup/n (3)
Wherein: vuphisFor historical rate of rise, V, of AGC units of the master stationupAnd n is the statistical historical data quantity, and is the rising rate of each piece of historical data of the AGC unit of the main station.
Vdnhis＝∑Vdn/n (4)
Wherein: vdnhisFor historical rate of descent, V, of AGC units of the master stationdnIs a main station AAnd the descending rate of each piece of historical data of the GC unit, wherein n is the number of the statistical historical data.
Referring to fig. 3, a schematic flow chart of the method for controlling the performance analysis and the grading of the thermoelectric generation unit according to the embodiment is shown, in which the adjustment rate of the performance of the reaction unit is adjusted to grade and the adjustment amount is distributed.
V1＝αVup+βVuphis (5)
V2＝αVdn+βVdnhis (6)
α+β＝1 (7)
Wherein: alpha is the proportion of the rising rate of the AGC unit of the main station, and beta is the proportion of the historical rising rate of the AGC unit of the main station.
Preg＝ΔP*V1.2/∑V1.2 (8)
Wherein: pregThe total delta P power to be adjusted of the AGC unit of the master station is the adjustment quantity of the AGC unit of the master station.
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: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand 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 (5)
1. A thermal power generating unit performance analysis grading control method is characterized by comprising the following steps:
counting the rising rate and the falling rate of the thermal power generating unit according to the instruction execution condition of each thermal power generating unit, and calculating the actual measurement rate of the thermal power generating unit;
calculating a unit historical adjusting rate average value reflecting the adjusting rate of the thermal power unit aiming at the historical rate statistics of the thermal power unit in the last year;
and thirdly, the measured speed and the historical data of the performance of the reaction unit are integrated to carry out grading and regulating quantity distribution on the unit.
2. The thermal power generating unit performance analysis grading control method according to claim 1, characterized in that: the step (i) includes the steps of:
and respectively calculating the rising rate and the falling rate of the units according to the unit issuing command value and the unit output condition of the lower period which are issued and recorded by each thermal power unit in each command period, and further counting and analyzing the actual measurement rate of the thermal power units.
3. The thermal power generating unit performance analysis grading control method according to claim 1, characterized in that the step (II) comprises the steps of:
by inquiring the historical records issued by each thermal power generating unit in the last year, the historical rising regulation rate and the historical falling regulation rate of each thermal power generating unit are counted, and the regulation rate mean value of the historical regulation performance of the reaction unit is comprehensively calculated.
4. The thermal power generating unit performance analysis grading control method according to claim 1, wherein the step (c) includes the steps of:
and (4) integrating the calculated actually measured speed of the current performance of the reaction unit and the historical speed average value of the historical performance of the reaction unit, grading the units, and distributing the full-network regulating quantity to the unit where each gear is located according to the divided gears.
5. The thermal power generating unit performance analysis grading control method according to claim 4, wherein the step (c) includes the steps of:
according to the obtained comprehensive performance index regulation rate of each unit, distributing the whole network regulation quantity; when the operation condition of the power grid changes, the adjustment quantity of the whole power grid is automatically distributed, and intelligent distribution of each unit according to the performance of each unit is realized until all the total adjustment quantity is completely distributed.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113541131A (en) * | 2021-07-20 | 2021-10-22 | 西安热工研究院有限公司 | Automatic starting method for thermal power generating unit subsystem |
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