CN103138293A - Optimal distribution method and system for heat-engine plant plant-level loads - Google Patents
Optimal distribution method and system for heat-engine plant plant-level loads Download PDFInfo
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Abstract
The invention provides a distribution method and a system for heat-engine plant plant-level loads, wherein the method comprises the steps of obtaining load limit and load energy consumption properties of each generating set in multiple generating sets, according to the obtained load limit and the load energy consumption properties of each generating set and a planned total load value, calculating a load distribution plan, and according to the obtained load distribution plan, distributing loads for each generating set so as to meet the facts that the obtained loads distributed for each generating set is within the load limit of each generating set, the sum of the obtained loads of the multiple generating sets is equal to the plan total load value, and obtained total energy consumption of the multiple generating sets is the lowest. According to the technical scheme, optimization and load distribution of the plant-level generating sets can be automatically and reasonably conducted according to the load energy consumption properties, adjustment rates, load adjustment limits and operation conditions of the generating sets, and therefore the total energy consumption of the whole plant is enabled to be the lowest under the premise that the plan total load value is met.
Description
Technical field
The present invention relates to the thermal power generation field, particularly, relate to a kind of Power Plant stage load optimizing distribution method and system.
Background technology
The fossil energy that heat power station uses is non-renewable energy resources, and how effectively utilizing fossil energy (for example, coal) in thermal power generation is that world wide all needs the problem that solves.At present, China's domestic production life electric energy that uses is mainly from (using coal) thermal power generation.Therefore, how energy-saving and emission-reduction effectively utilize limited coal resources, are also the most important things that China realizes sustainable development.
A kind of scheme that arranges generation schedule according to fired power generating unit actual consumption level is provided in prior art.In this in scheme, employing be that automatic generation control (Automatic Generation Control, AGC) is directly transferred mode.AGC directly transfers mode, namely to the total load of full factory of thermal power plant plan generating according to unit quantity mean allocation, the load value of mean allocation is issued every unit as the plan load of each unit, directly dispatch every unit load.The AGC mode of directly transferring has played active and effective facilitation to the safe and stable operation of electrical network, but because this mode mean allocation of load is not considered otherness between each unit to each unit, so the effect of energy consumption saving is also not obvious.
Therefore, can be under the prerequisite of completing the level of factory generation load for how energy efficient effectively, there is no good solution in prior art.
Summary of the invention
The purpose of this invention is to provide a kind of Power Plant stage load distribution method and system with energy efficient effectively under the prerequisite of completing the level of factory generation load.
To achieve these goals, provide according to an aspect of the present invention a kind of Power Plant stage load distribution method, the method comprises: load limit and the load energy consumption characteristics of obtaining each generating set in many generating sets; Load limit and load energy consumption characteristics and plan total load value according to described each generating set that obtains, the calculated load allocative decision also is respectively described each generating set distribution load to satisfy according to described sharing of load scheme: the load that distributes as described each generating set is within its load limit, the summation of the load of described many generating sets equals to plan the total load value, and the total energy consumption of described many generating sets is minimum.
Further, calculated load allocative decision and the step that is respectively described each generating set distribution load according to described sharing of load scheme comprise: according to load limit and load energy consumption characteristics and the plan total load value of described each generating set that obtains, calculate a plurality of allocative decisions to be selected; The total energy consumption of corresponding described many generating sets of each allocative decision of more described a plurality of allocative decisions to be selected; And the minimum allocative decision of total energy consumption of selecting to make described many generating sets according to the result of described comparison.
Further, the method also comprises: the regulations speed and the Real-time Load that obtain described each generating set; And when described plan total load value changed, load limit, load energy consumption characteristics, regulations speed and Real-time Load according to described each generating set calculated and adjust allocative decision.
Further, described calculating adjustment allocative decision comprises: according to Real-time Load and the load limit of described each generating set, calculate the adjustable extent of the load of this generating set; And according to adjustable extent, the load energy consumption characteristics of the load of described each generating set, adjust speed and change after plan total load value, calculate and adjust allocative decision.
According to another aspect of the present invention, provide a kind of Power Plant stage load distribution system, this system comprises:
Be used for obtaining the load limit of each generating set of many generating sets and the device of load energy consumption characteristics; Load limit and load energy consumption characteristics and plan total load value according to described each generating set that obtains, the calculated load allocative decision also is respectively described each generating set distribution load to satisfy according to described sharing of load scheme: the load that distributes as described each generating set is within its load limit, the summation of the load of described many generating sets equals to plan the total load value, and the minimum device of the total energy consumption of described many generating sets.
Further, this system also comprises: according to load limit and load energy consumption characteristics and the plan total load value of described each generating set that obtains, calculate the device of a plurality of allocative decisions to be selected; The device of the total energy consumption of corresponding described many generating sets of each allocative decision of more described a plurality of allocative decisions to be selected; And the device of selecting to make the minimum allocative decision of the total energy consumption of described many generating sets according to the result of described comparison.
Further, this system also comprises: obtain the regulations speed of described each generating set and the device of Real-time Load; And when described plan total load value changed, load limit, load energy consumption characteristics, regulations speed and Real-time Load according to described each generating set calculated the device of adjusting allocative decision.
Further, this system also comprises: according to Real-time Load and the load limit of described each generating set, calculate the device of adjustable extent of the load of this generating set; And according to adjustable extent, the load energy consumption characteristics of the load of described each generating set, adjust speed and change after plan total load value, calculate the device of adjusting allocative decision.
Pass through technique scheme, can come automatically, reasonably carry out according to load energy consumption characteristics, regulations speed, Load Regulation limit and the operating condition of each generating set optimum organization and the sharing of load of level of factory generating set, thereby realize making the total energy consumption of full factory minimum under the prerequisite that satisfies plan total load value.By the present invention, can avoid the frequent of generating set back and forth to regulate, reduced the life consumption of unit.
Other features and advantages of the present invention will partly be described in detail in embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide a further understanding of the present invention, and consists of the part of specification, is used from explanation the present invention with following embodiment one, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the Power Plant stage load distribution method flow chart according to embodiment of the present invention;
Fig. 2 is Power Plant stage load distribution method flow chart according to the preferred embodiment of the present invention;
Fig. 3 is the Power Plant stage load distribution system configuration schematic diagram according to exemplary embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only is used for description and interpretation the present invention, is not limited to the present invention.
From the introduction of background technology, as can be known, what in prior art, the level of factory load scheduling of thermal power plant adopted is the AGC scheduling mode.And mainly there is following problem in this scheduling mode: at first, unit AGC scheduling Load Regulation frequency is too high, back and forth regulates numerous frequency, and the instruction toning is many, and the actual set response is not come, and affects unit operation economy and life consumption; Secondly, unit AGC scheduling can not be implemented to load to optimize according to the Unit Economic gender gap and distribute.Concerning whole electrical network, because unit quantity is a lot, the scheduling side is not understood the concrete operation characteristic of each unit and real-time working condition, and the factor of considering when distributing unit load is complicated, is difficult to realize the sharing of load on the whole network " energy consumption is minimum " meaning; Moreover when carrying out unit AGC scheduling, dispatching patcher can not be made timely response to the abnormal and accident that certain unit occurs, and can only wait the secondary instruction of middle accent AGC, and power grid security is impacted.
For the problems referred to above of the prior art.The invention provides a kind of Power Plant stage load distribution method.Fig. 1 is the Power Plant stage load distribution method flow chart according to embodiment of the present invention.As shown in Figure 1, Power Plant stage load distribution method according to the present invention comprises: S100, obtain the load limit of each generating set in many generating sets and the energy consumption characteristics of loading; S102, load limit and load energy consumption characteristics and plan total load value according to described each generating set that obtains, the calculated load allocative decision also is respectively described each generating set distribution load to satisfy according to described sharing of load scheme: the load that distributes as described each generating set is within its load limit, the summation of the load of described many generating sets equals to plan the total load value, and the total energy consumption of described many generating sets is minimum.By technique scheme, realized the reasonable distribution of load, realized the effective utilization of fired power generating unit to coal.
Wherein the load limit of generating set (or load regulation range) and load energy consumption characteristics can be by obtaining generating set, EMS (EMS) and/or the data acquisition of main website of coal consumption system.The load energy consumption characteristics can be data or represent curve.Data acquisition can be used unified data acquisition transmission platform.For example, the data acquisition transmission platform can be from the safe I of grid side district EMS collecting unit generating curve data, the collecting unit curve data that generates electricity from the safe I of the Power Plant Side district generating curve server; Gather unit load energy consumption characteristics data from the safe III of grid side district main website of coal consumption system, gather unit load energy consumption sample data from the safe III of grid side district main website of coal consumption system, gather unit real time execution load from the safe I of grid side district EMS, and gather the related constraint condition from the safe I of grid side district EMS.
Fig. 2 is Power Plant stage load distribution method flow chart according to the preferred embodiment of the present invention.As shown in Figure 2, Power Plant stage load distribution method comprises according to the preferred embodiment of the present invention: S100, obtain the load limit of each generating set in many generating sets and the energy consumption characteristics of loading; S200 according to load limit and load energy consumption characteristics and the plan total load value of described each generating set that obtains, calculates a plurality of allocative decisions to be selected; S202, the total energy consumption of corresponding described many generating sets of each allocative decision of more described a plurality of allocative decisions to be selected; And S204, select to make the minimum allocative decision of total energy consumption of described many generating sets according to the result of described comparison.
In technique scheme, each allocative decision to be selected all can be completed the level of factory load, and difference is that total energy consumption is different.The total energy consumption of corresponding described many generating sets of each allocative decision by more described a plurality of allocative decisions to be selected when the level of factory sharing of load, can implement load optimization according to the Unit Economic gender gap and distribute, realize the sharing of load on the whole network " energy consumption is minimum " meaning.
Preferably, Power Plant stage load distribution method according to the present invention also comprises: the regulations speed and the Real-time Load that obtain described each generating set; And when described plan total load value changed, load limit, load energy consumption characteristics, regulations speed and Real-time Load according to described each generating set calculated and adjust allocative decision.According to Real-time Load and its load limit of each generating set, can determine the adjustable extent of the load of this generating set; According to the energy consumption characteristics of different generating sets, preferentially select the good unit of energy consumption characteristics to adjust; In addition, adjust the regulations speed that can consider generating set in allocative decision, make meeting under the prerequisite of production requirement, the time of adjusting to the total load value after variation is short as far as possible, and avoids toning.Preferably, calculating the adjustment allocative decision can comprise: according to Real-time Load and the load limit of described each generating set, calculate the adjustable extent of the load of this generating set; And according to adjustable extent, the load energy consumption characteristics of the load of described each generating set, adjust speed and change after plan total load value, calculate and adjust allocative decision.According to this preferred implementation, can realize the performance parameters such as load energy consumption characteristics, response (or adjusting) speed, load limit (or adjustable range), operating condition according to each unit, automatically, reasonably carry out optimum organization and the sharing of load of full brand-name computer group; Change traditional AGC and directly transfer mode, avoid the frequent of unit back and forth to regulate, reduced the life consumption of unit.
Need to prove, the calculating of the relevant sharing of load that relates in the present invention can data be processed and the central apparatus of calculating is completed by being responsible for.Data are processed with computer center can realize that load is optimized Distribution Calculation, the units consumption specificity analysis calculates, optimizes functions such as distributing experimental calculation, energy-conservation statistical analysis calculating.Wherein, optimizing Distribution Calculation by load completes and becomes each generating set plan to load unit (or power plant) plan load decomposition the unit in.Calculate assisted user by the units consumption specificity analysis units consumption characteristic is carried out analytical calculation, facilitate the user units consumption characteristic is modified and check.Optimize by load and distribute experimental calculation, the user can compare the quality of different load optimized allocation, better formulate the load optimized allocation, by energy-conservation statistical analysis calculate help the user to get information about to adopt very much to optimize distribute after with the energy consumption comparison situation of before pro rate by measure, thereby the economic benefit that this system applies of objective measurement produces.
Fig. 3 is the Power Plant stage load distribution system configuration schematic diagram according to exemplary embodiment of the invention.As shown in Figure 3, in the adaptable exemplary system architecture of the inventive method, comprising: network firewall, main website calculation server, master station application server, reverse isolation device, non real-time VPN and substation application server etc.In this system, the main website calculation server is deployed in power grid security II district, and is connected via data communication network is two-way with the EMS that is in power grid security I district by network firewall; The main website calculation server carries out two-way the connection with the master station application server in power grid security II district, realizes the business datum exchange; The coal consumption system of main website that is in power grid security III district through the reverse isolation device with the business datum unidirectional delivery to the master station application server; Simultaneously the master station application server carries out both-way communication with the substation application server that is deployed in power plant safety II district by non real-time VPN, realizes uploading, issuing of business datum.
Can find out from system configuration shown in Figure 3, the Power Plant stage load distribution system of illustrative embodiments of the present invention can be compatible mutually with existing Load Distribution System.So just can realize compatibility, economy, the retractility and expansionary of system.This system takes into full account the practical situations of AGC up till now, and original unit AGC load scheduling function is kept, and can switch at any time.Scheduling side and Network of Power control system (NCS) keep original communication modes.The former NCS of power plant remains unchanged to the I/O signal of each unit scattered control system (DCS).Level of factory AGC system control strategy must satisfy dispatching patcher related request and regulation, as power grid security nargin etc.Level of factory AGC system's real-time servicing and software and hardware adjustment do not affect the normal operation work of existing DCS, supervisory information system (SIS) and NCS equipment.All newly added equipments or system satisfy the electricity secondary safety protection regulation.
In addition, can also provide alarm function in system.In present design, system by alarm with control platform, realized each link to system, comprise that the start and stop of hardware server, network, each working procedure assembly, ruuning situation all carried out the Real Time Monitoring record.By setting up complete alarm and the controlling mechanism of cover, in case there are any abnormal conditions to occur, system can find and the alarm by sending different stage according to alarm and controlling mechanism and anomalous event rank timely, can accomplish that like this very first time is to the knowing and processing of system exception, the assurance system safety stable operation of maximum possible.
Below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned execution mode; in technical conceive scope of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Need to prove that in addition each the concrete technical characterictic described in above-mentioned embodiment in reconcilable situation, can make up by any suitable mode.For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible compound modes.
In addition, also can carry out combination in any between various execution mode of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (8)
1. Power Plant stage load distribution method, the method comprises:
Obtain load limit and the load energy consumption characteristics of each generating set in many generating sets;
Load limit and load energy consumption characteristics and plan total load value according to described each generating set that obtains, the calculated load allocative decision also is respectively described each generating set distribution load to satisfy according to described sharing of load scheme: the load that distributes as described each generating set is within its load limit, the summation of the load of described many generating sets equals to plan the total load value, and the total energy consumption of described many generating sets is minimum.
2. method according to claim 1, wherein, calculated load allocative decision and the step that is respectively described each generating set distribution load according to described sharing of load scheme comprise:
According to load limit and load energy consumption characteristics and the plan total load value of described each generating set that obtains, calculate a plurality of allocative decisions to be selected;
The total energy consumption of corresponding described many generating sets of each allocative decision of more described a plurality of allocative decisions to be selected; And
Select to make the minimum allocative decision of total energy consumption of described many generating sets according to the result of described comparison.
3. method according to claim 1 and 2, wherein, the method also comprises:
Obtain regulations speed and the Real-time Load of described each generating set; And
When described plan total load value changed, load limit, load energy consumption characteristics, regulations speed and Real-time Load according to described each generating set calculated and adjust allocative decision.
4. method according to claim 3, wherein, described calculating is adjusted allocative decision and is comprised:
According to Real-time Load and the load limit of described each generating set, calculate the adjustable extent of the load of this generating set; And
According to adjustable extent, the load energy consumption characteristics of the load of described each generating set, adjust speed and change after plan total load value, calculate and adjust allocative decision.
5. Power Plant stage load distribution system, this system comprises:
Be used for obtaining the load limit of each generating set of many generating sets and the device of load energy consumption characteristics;
Load limit and load energy consumption characteristics and plan total load value according to described each generating set that obtains, the calculated load allocative decision also is respectively described each generating set distribution load to satisfy according to described sharing of load scheme: the load that distributes as described each generating set is within its load limit, the summation of the load of described many generating sets equals to plan the total load value, and the minimum device of the total energy consumption of described many generating sets.
6. system according to claim 5, wherein, this system also comprises:
According to load limit and load energy consumption characteristics and the plan total load value of described each generating set that obtains, calculate the device of a plurality of allocative decisions to be selected;
The device of the total energy consumption of corresponding described many generating sets of each allocative decision of more described a plurality of allocative decisions to be selected; And
Select to make the device of the minimum allocative decision of the total energy consumption of described many generating sets according to the result of described comparison.
7. according to claim 5 or 6 described systems, wherein, this system also comprises:
Obtain the regulations speed of described each generating set and the device of Real-time Load; And
When described plan total load value changed, load limit, load energy consumption characteristics, regulations speed and Real-time Load according to described each generating set calculated the device of adjusting allocative decision.
8. system according to claim 7, wherein, this system also comprises:
According to Real-time Load and the load limit of described each generating set, calculate the device of adjustable extent of the load of this generating set; And
According to adjustable extent, the load energy consumption characteristics of the load of described each generating set, adjust speed and change after plan total load value, calculate the device of adjusting allocative decision.
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| CN107829924A (en) * | 2017-07-01 | 2018-03-23 | 蔚海建 | The control method and equipment that a kind of recirculated water pump group based on big data most saves |
| CN109376957A (en) * | 2018-12-03 | 2019-02-22 | 渤海大学 | A kind of prediction technique of thermal power plant's load |
| CN116316561B (en) * | 2023-02-13 | 2024-04-23 | 湖北清江水电开发有限责任公司 | AGC system for river basin step power plant |
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Application publication date: 20130605 |