CN102761124A - Method for predetermining power generation loads of self-provided power generator units - Google Patents

Method for predetermining power generation loads of self-provided power generator units Download PDF

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CN102761124A
CN102761124A CN2012101614406A CN201210161440A CN102761124A CN 102761124 A CN102761124 A CN 102761124A CN 2012101614406 A CN2012101614406 A CN 2012101614406A CN 201210161440 A CN201210161440 A CN 201210161440A CN 102761124 A CN102761124 A CN 102761124A
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unit
load
moment
generation load
cost
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CN102761124B (en
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王毅
李杨
王金祥
沈军
游喜荣
刘爱军
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Shougang Jingtang United Iron and Steel Co Ltd
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Shougang Jingtang United Iron and Steel Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/222—Demand response systems, e.g. load shedding, peak shaving

Abstract

The invention discloses a method for predetermining power generation loads of self-provided power generator units, belonging to the technical field of economized dispatching in power sectors. The method comprises the following steps of: dividing the self-provided power generator units into low-cost units and high-cost units; determining the power generation loads of the low-cost power generator units, acquiring a new electrical load curve, determining the power generator loads of the high-cost power generator units, marking the power generator loads of the high-cost power generator units with points, and dividing the new load curve into at least one section; setting the value on the power generation load curve of each high-cost unit at any moment within the period of time as a best power generation load value; acquiring the time required during transition process of load regulation of each high-cost unit each time and the number of the points contained on the power generation load curve; translating backward the power generation load curve of each transition process for at least one unit time according to the time sequence; and taking the power generation load curve of each high-cost unit when the total cost is at the minimum. With adoption of the method, under the condition that the self-generating level of enterprises is kept basically constant, the cost in outsourcing electricity is reduced, so that the total electricity cost of the enterprises is reduced.

Description

A kind of method of confirming house generator group generation load in advance
Technical field
The invention belongs to power industry economization dispatching technique field, particularly a kind of method of confirming house generator group generation load in advance.
Background technology
In the last few years, under social economy's high speed development and the continuous background that changes of Market Situation, energy-saving and cost-reducing, energy savings cost had become each enterprise and had reduced cost, and improved the outstanding request of synthesized competitiveness.Along with improving constantly of waste heat surplus energy utility level; It is increasingly high that waste heat complementary energy reclaims the proportion of generating in the total electricity consumption of enterprise; But often only can satisfy the part of enterprise's ordinary production required electric power load; When each waste heat complementary energy reclaimed the whole oepration at full load of generating set, enterprise still needed from a large amount of electric energy of electrical network outsourcing.In order further to reduce electric cost; Some large size industrial enterprises are when paying attention to traditional waste heat complementary energy recovery generation technology; Also built the use conventional fuel,, realized that basically self power generation can satisfy the condition of producing whole electricity consumptions like the big capacity house generator group of coal, natural gas etc.
The business electrical cost is generally by outsourcing electricity cost and self power generation cost structure.Because enterprise's outsourcing electric energy is generally taked the mode of Pinggu, peak segmentation valuation, if day part is all bought identical electric energy from electrical network, the electric cost that then produces is with different.When the self power generation ability of enterprise acquires a certain degree; Under the constant situation of total electricity consumption, adjust the size of spontaneous electric weight according to the height of outsourcing electricity price lattice, reduce the electric weight of purchasing of high period of electricity price; Improve the electric weight of purchasing of low period of electricity price; Can be so that the self power generation level be constant basically, but outsourcing electricity cost is reduced, thus reduce total electric cost.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of method of confirming house generator group generation load in advance, when being used for industrial enterprise's self power generation ability and reaching higher level, confirm respectively to provide for oneself the plan of generating set generation load curve.
The invention provides a kind of method of confirming house generator group generation load in advance, comprising:
Respectively provide enterprise for oneself generating set and be divided into low-cost unit and expensive unit from the big or small comparative result of external electric net purchase electricity paddy section electricity price according to cost of electricity-generating and enterprise;
Confirm the generation load of low-cost generating set, obtain business electrical load curve and renewal, obtain new power load curve;
Point on the said new power load curve is carried out mark, be divided at least one section according to the said new load curve of naming a person for a particular job of mark;
Obtain the size of the best generation load in arbitrary each section of expensive unit; And with should the value in arbitrary moment all being set to said best generation load value in the period on the generation load curve of this unit, until the generation load curve that obtains every expensive unit whole day;
To the generation load curve of each expensive unit, obtain the required time of transient process that each unit is loaded at every turn and adjusted, and each transient process contains the number of the point on the generation load curve;
With the generation load curve of each transient process according to time sequencing at least one unit interval of translation backward;
Calculate the different unit interval of each transient process translation respectively during number, the size of the total electric cost of whole day is got total cost corresponding generation load curve when minimum.
The invention provides the iron and steel enterprise of having large-scale coal fired power generation unit and carry out the optimization of self power generation load, formulate enterprises and respectively provide the method instance of generating set load curve plan for oneself.Employing is according to the means of the different interval corresponding adjustment self power generation loads of enterprise's outsourcing electricity price; According to plan of business electrical load and production maintenance plan; Calculate the relation between interior house generator group load of different time sections and electric cost; Obtain the unit load size of day part total cost when minimum, confirm the unit whole day load gauge tracing hour of total electric cost according to the dividing condition of each period then.Use this method and can keep reducing outsourcing electricity cost under the constant basically situation of enterprise's self power generation level; Thereby reduce total electric cost of enterprise; Be applicable to the purpose of saving such as the enterprises implement that has large-scale house generator group, the particularly steel plant of coal fired power generation unit, petrochemical plant cost.
Description of drawings
The method flow diagram of confirming respectively to provide for oneself the generating set generation load in advance that Fig. 1 provides for the embodiment of the invention;
Fig. 2 is the method flow diagram that calculates best generation load in a certain section in the embodiment of the invention;
Fig. 3 is a method principle schematic of calculating best generation load in a certain section in the embodiment of the invention;
Fig. 4 is the generative process principle schematic of transient process in the embodiment of the invention;
Fig. 5 is the transient process time method of a translation plurality of unit backward principle schematic in chronological order in the embodiment of the invention;
Fig. 6 is the principle schematic of three kinds of situation of transient process in the embodiment of the invention.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, the present invention is made further detailed description below in conjunction with accompanying drawing.
The embodiment of the invention adopts the means according to the different interval corresponding adjustment self power generation loads of enterprise's outsourcing electricity price; According to plan of business electrical load and production maintenance plan; Calculate the relation between interior house generator group load of different time sections and electric cost; Obtain the unit load size of day part total cost when minimum, confirm the unit whole day load gauge tracing hour of total electric cost according to the dividing condition of each period then.Use this method and can keep reducing outsourcing electricity cost under the constant basically situation of enterprise's self power generation level; Thereby reduce total electric cost of enterprise; Be applicable to the purpose of saving such as the enterprises implement that has large-scale house generator group, the particularly steel plant of coal fired power generation unit, petrochemical plant cost.
As shown in Figure 1, the method for respectively providing the generating set generation load for oneself of confirming in advance that the embodiment of the invention provides comprises:
Step 101, enterprise respectively provided for oneself cost of electricity-generating and the enterprise of generating set and sort according to from low to high order from the crest segment electricity price of external electric net purchase electricity, flat section electricity price and paddy section electricity price.
Step 102, cost of electricity-generating is lower than the house generator group of purchasing electric paddy section electricity price is divided into low-cost unit, all the other house generator groups are divided into expensive unit.For all low-cost units, the principle that all reaches real-time maximum generation ability according to whole day is confirmed the generation load of this unit.
Step 103, the production process of enterprise is decomposed into some operations, to during arbitrary operation ordinary production and power load and time relation curve between turn(a)round measure.According to the production maintenance plan of each operation of enterprise, in conjunction with the power load and the time relation curve condition that reach during the ordinary production between turn(a)round, whole power load of enterprise and time relationship are predicted, obtain the business electrical load curve.The size of each certain total power load of moment enterprise of some expression on the curve, the time interval size of any adjacent point-to-point transmission is identical on the curve.With the numerical value of each point on the business electrical load curve deduct all low-cost units the generation load value in this moment with, obtain new power load curve.
Step 104, with the enterprise production maintenance scheduling rise/end constantly, the maintenance scheduling of low-cost unit rise/end constantly and enterprise from the declinable moment of external electric net purchase electricity price, sort according to the time order and function order, and remove the wherein moment of repetition.
Step 105, for all expensive units; If consider the influence of the shift system in the unit production process; The moment after the ordering that the zero hour of the process of respectively relieving that then the unit shift system is related to and the finish time and step 104 obtain compares; If there is moment of being in during the process of relieving in each after the ordering that obtains of step 104 or repeats with the process zero hour of relieving, the finish time constantly the moment; Then remove the moment that is in during the process of relieving and the moment of repetition, keep and relieve the process zero hour and the finish time; If the moment that does not have moment of being in during the process of relieving or repeat with the process zero hour of relieving, the finish time is then removed relieve the process zero hour and the finish time, carry out next step 106.If do not consider the influence of the shift system in the unit production process, then do not carry out any processing, carry out next step 106.
Step 106, the result that step 105 is obtained sort according to the time order and function order, and on the new power load curve that step 103 is obtained have a few among in time with ordering after each constantly identical point carry out mark.According to the time order and function order, first point on the new power load curve that step 103 obtains begins, and is defined as the starting point of first period; On curve, search point according to time order backward through mark; Whenever find the point of a mark,, finish the current period this terminal point as the current period; And define a new period; With the starting point of this point, when on load curve, not passing through the point of mark, with the terminal point of last point on the load curve as last period as the new period.So far, the new power load curve that step 103 obtains is divided into some sections, and each section all exists a starting point and terminal point.
Step 107, the generation load curve of arbitrary expensive unit is carried out same division according to the section division methods that step 106 obtains.Calculate the size of the best generation load in arbitrary each section of expensive unit; And with should be in the period on the generation load curve of this unit the value in arbitrary moment all be set to the best generation load value that calculates, until the generation load curve that obtains every expensive unit whole day.
Fig. 2 is for calculating the method flow diagram of best generation load in a certain section, and Fig. 3 is the sketch map of this method, and this method may further comprise the steps:
Step 1071, the maximum permissible load of confirming every generating set and minimum permissible load, and the size of best generation load permissible accuracy.
Total generation load size of arbitrary moment is the minimum permissible load size of each unit sum in step 1072, the setting section, like " minimum generation load " line among Fig. 3, and self power generation total amount in the calculation of sector, like the zone among Fig. 3 1..
Step 1073, to all constantly calculate the poor of arbitrary moment power load size and total generation load size in the section.If the power load size adds up difference greater than the size of total generation load, and with the result divided by the section time, count this section and purchase electric weight, 2. like the zone among Fig. 3 from electrical network; If the power load size is less than the size of total generation load, difference taken absolute value adds up, and with the result divided by the section time, count this section to the mains supply amount, 3. like the zone among Fig. 3.
Step 1074, according to the formation of electric cost, self power generation total amount in the section that obtains with step 1072 and step 1073, purchase electric weight and the size of total electric cost in mains supply amount calculation of sector from electrical network.
Step 1075, get the minimum unit of cost of electricity-generating under current each unit load level; Its load is increased, and the increment size is the best generation load curve of this a unit permissible accuracy size, after the calculating generation load increases; The self power generation total amount of all generating sets in the section; And according to the method for step 1073 and step 1074, calculate from electrical network purchase electric weight, to the size of mains supply amount and total electric cost, all reach maximum permissible load until all units.Process like " minimum generation load " among Fig. 3 → " load 1 " → " load 2 " → " maximum generation load ".
Step 1076, the payload of getting in the step 1075 each unit under the minimum situation of total electric cost are the best generation load of each unit in this section.
The generation load curve of arbitrary unit in step 108, all expensive units that step 107 is obtained; When the best generation load size of any two adjacent periods is inequality, show that this unit need experience the variation that the adjustment process of once loading (hereinafter to be referred as " transient process ") realizes load.With the size of each load variations amount, obtain the required time of the each transient process of each unit divided by the generation load rate of change of every unit.Each transient process required time divided by the time length (hereinafter to be referred as " unit interval ") between two points on the generation load curve, is obtained the number that each transient process contains the point on the generation load curve.The initial load size of each transient process unit is this transient process unit load size of previous stage, and the unit load that stops payload and be this transient process the latter half is big or small.In the transient process, the generation load of unit is by initial load linear change to termination load, and is as shown in Figure 4.
Step 109, each transient process to relating in the step 108, the moment that its load begins to change is the initial moment of transient process.Begin from the initial moment; With the unit generation load curve during each transient process according to the time sequencing translation plurality of unit backward time; And the payload of the part between initial moment of the transient process after the initial moment and the translation is set to the initial load of transient process on the original load curve, and is as shown in Figure 5.The initial moment of transient process and the unit interval number of translation should confirm that as shown in Figure 6, concrete grammar is according to different situations such as the corresponding production maintenance of transient process, low-cost unit maintenance or the variations of outsourcing electricity price lattice:
1, if do not consider the influence in the period of relieving in the unit production process, then confirm as follows:
1. calculated moment that begins to overhaul of production maintenance, the moment that 2. returns to normal production, the declinable moment of 3. outsourcing electricity price and point on the generation load plan curve are carried out according to time sequencing corresponding, and will overhaul/relieve initial, overhaul/relieve and stop and electricity price changes and amounts to three kinds of states constantly these points are carried out mark.
1. moment corresponding is the initial moment of transient process, and the unit interval number of translation is zero, shown in Fig. 6-a; 2. moment corresponding is that transient process stops constantly, and the unit interval number of translation is zero, shown in Fig. 6-b; 3. moment corresponding is that transient process stops constantly; The unit interval of calculating translation is calculated the time length of non-transient process in the next time section earlier during number, and result and this transient process are compared; Shown in Fig. 6-c; Get wherein smaller value divided by unit interval of unit load curve, the result is rounded numerical value, the part of not enough integer is got a complete unit interval.
2, if consider the influence in the period of relieving in the unit production process, require unit load constant during relieving, then confirm as follows:
With 1. calculated moment that begins to overhaul of production maintenance, the moment that 2. returns to normal production, 3. the process of relieving in the unit three-shift system production process the initial moment, 4. the process of relieving in the unit three-shift system production process termination constantly, the declinable moment of 5. outsourcing electricity price and point on the generation load plan curve carry out according to time sequencing corresponding, and will overhaul/relieve initial, overhaul/relieve and stop and electricity price changes and amounts to three kinds of states constantly these points are carried out mark.
1. and 4. moment corresponding is the initial moment of transient process, and the unit interval number of translation is zero, shown in Fig. 6-a; 2. and 3. moment corresponding is that transient process stops constantly, and the unit interval number of translation is zero, shown in Fig. 6-b; 5. moment corresponding is that transient process stops constantly; The unit interval of calculating translation is calculated the time length of non-transient process in the next time section earlier during number, and result and this transient process are compared; Shown in Fig. 6-c; Get wherein smaller value divided by unit interval of unit load curve, the result is rounded numerical value, the part of not enough integer is got a complete unit interval.
Step 110, calculate the different unit interval of each transient process translation during number respectively, the size of the total electric cost of whole day is got total cost corresponding generation load curve when minimum.
Step 111, the moment that changes as if last outsourcing electricity price of whole day are crest segment to paddy section; The best generation load of each the expensive unit that then step 107 is obtained issues electric cost order from low to high according to each unit when preload; The generation load of one by one that cost is minimum unit increases; The increment size is the best generation load curve of this a unit permissible accuracy size; And confirm once the zero-time of each transient process and the unit interval number of translation again, the size of total electric cost when calculating each transient process translation difference unit interval number respectively all reaches identical with last period load until all expensive units.In all results, get total cost when reaching minimum value, each corresponding with it unit generation load curve is the best generation load curve of whole day.
Lift a concrete application example below and come further to set forth the method for confirming respectively to provide for oneself the generating set generation load in advance that the embodiment of the invention provides:
Certain steel plant's construction has 8 house generator groups, and wherein two 300MW coal fired power generation units are expensive unit, and all the other six generating sets are low-cost unit.Each generating set is all carried out generation load curve system, and first point of load curve is 0:00, and each some moment corresponding is back 15 minutes of the previous corresponding moment later on, finishes to 24:00.The required precision of the generation load curve of 300MW unit is 10MW, and unit is by three-shift system production, and the handing-over schedule is respectively: 23:30-0:30,7:30-8:30,15:30-16:30, during unit load remain unchanged.
These steel plant's outsourcing electricity price lattice are interval to distribute as follows: crest segment: 8:00-11:00 and 18:00-23:00, flat section: 7:00-8:00 and 11:00-18:00, paddy section: 23:00-7:00 next day.
One day, this steel plant's operationpiston maintenance, the repair time section is 8:00-20:00; Each generating set does not all have scheduled overhaul.According to the production maintenance plan, according to the load curve of each generating set of embodiment of the invention method formulation, implementation process is following:
Step 1, the value of each point on steel plant's power load curve is deducted this moment generation load sum of each low-cost unit, obtain new power load curve, be used for confirming of two 300MW unit load curves.If the time interval on the power load curve between two points is less than the time interval between two points on the generation load curve, then the part between two points on the generation load curve is carried out linear interpolation according to the moment of power load curve.
Step 2, will be 1. the calculated moment 8:00 that begins to overhaul of production maintenance, the moment 20:00 that 2. returns to normal production, 3. the process of relieving in the unit three-shift system production process initial moment 23:30,7:30,15:30,4. the termination of the process of relieving in the unit three-shift system production process is carried out corresponding with each nearest point of the moment on 0:30,8:30,16:30, the declinable 7:00 of 5. outsourcing electricity price, 8:00,11:00,18:00,23:00 and the generation load curve constantly; And sort according to time order and function; The moment that moment 8:00 that wherein begins to overhaul and the declinable moment 8:00 of outsourcing electricity price are repetition is so only keep a 8:00 constantly.Ranking results is for the first time: 0:30,7:00,7; 30,8:00,8.30,11:00,15:30,16:30,18:00,20:00,23:00,23:30.
Step 3, according to the influence of considering the factor of relieving, unit load is constant during the relieving of 7:30-8:30, and removes the moment 8:00 that is positioned at wherein; In the moment of not having the maintenance beginning during the 15:30-16:30 or stopping, fall the to relieve zero hour 15:30 of dieing stops 16:30 constantly with relieving.Ranking results is for the second time: 0:30,7:00,7; 30,8.30,11:00,18:00,20:00,23:00,23:30.
Step 4, each point after will sorting according to: a) initial moment of maintenance or relieve stops constantly, i.e. 0:30 in the step 3,8:30; B) maintenance stops constantly or relieves the initial moment, i.e. 7:30,23.30,20:00; C) moment of changing of outsourcing electricity price lattice, i.e. 7:00,11:00,18:00,23:00, it is corresponding with these points respectively to amount to three kinds of states, is defined as a period between the point of any two sign states.All dividing time-steps are: 0:00-0:30,0:30-7:00,7:00-7:30,7:30-8:30,8:30-11:00,11:00-18:00,18:00-20:00,20:00-23:00,23:00-23:30,23:30-24:00.
Step 5, arbitrary period that step 4 is obtained; Calculate respectively and should begin (for example 200MW) from minimum load by two 300MW units in the period, each load up 10MW all reaches in the process of the peak load (for example 300MW) in this period up to two units; When total electric cost is minimum; Two units payload separately is the optimum load size of unit in this period, and will be on the load curve of every unit in this period arbitrarily the value of any to be made as this optimum load big or small.
The load curve of step 6, every 300MW unit that step 5 is obtained calculates the difference size of adjacent two period optimum loads respectively, and difference divided by the load adjustment speed of this unit in this period, is obtained the time of each transient process.For a) type moment in the step 4, transient process is constantly initial at this, and the unit interval number of translation is zero; For the b in the step 4) type moment, transient process finishes at this constantly, and the unit interval number of translation is zero; For the c in the step 4) type moment; The transient process initial condition is for to finish at this constantly, then with the back in period the time length of non-transient process compare, get smaller value; Divided by this section period unit load adjustment speed; Obtain the number of the unit interval of transient process translation, the result is rounded numerical value, the part of not enough integer is got a complete unit interval.Calculate the moment that each transient process begins by this principle.
Step 7, the load curve that step 5 is obtained; The moment that each transient process that obtains according to step 6 begins and the unit interval number of translation; Calculate the different unit interval of each transient process translation respectively during number; The size of total electric cost is got each corresponding unit load curve of minimum value wherein.
Step 8, since outsourcing electricity price lattice change the paddy section in 23:00 into by crest segment; So with two 300MW units separately on the load curve size of the optimum load that calculates between period 23:00-23:30 and 23:30-24:00 increase 10MW one by one; But confirm the transient process zero-time of day part and the unit interval number of translation again; Reach the previous period until the payload of two units in this two periods; Be the optimum load size between the 20:00-23:00, calculate the load curve when wherein total cost is minimum, be the optimum load curve of two units.
After these steel plant confirm the load curve of two 300MW units according to the method for the invention; The proportion of self power generation in total electricity consumption remains unchanged; Crest segment is purchased electric weight and is descended in the ratio of always purchasing in the electric weight; The paddy section is purchased electric weight and is risen in the ratio of always purchasing in the electric weight, the target that realized that the self power generation cost does not raise, outsourcing electricity cost and total electric cost reduces.
In the present embodiment; Self power generation is related with total cost; Minimum with total electric cost is guiding, and having broken to satisfy production electricity consumption needs, the self power generation proportion substantially constant in total electricity consumption is the mode that guiding is formulated the self power generation plan, has realized the economization of self power generation production scheduling process; Fully combined the enterprise production maintenance scheduling that self power generation is regulated, improved the matching degree of self power generation and production process, the self adaptation degree is high, has reduced production management personnel's working strength.Present embodiment has reduced load difference between network load peak and low ebb apart from size in the electric cost that has reduced enterprise significantly, optimized the operation of power networks process, has ensured safe, stable, the efficient operation of electrical network.
Last example is embodiments of the invention, is not to be used to limit protection scope of the present invention.

Claims (12)

1. a method of confirming house generator group generation load in advance is characterized in that, comprising:
Respectively provide enterprise for oneself generating set and be divided into low-cost unit and expensive unit from the big or small comparative result of external electric net purchase electricity paddy section electricity price according to cost of electricity-generating and enterprise;
Confirm the generation load of low-cost generating set, obtain business electrical load curve and renewal, obtain new power load curve;
Point on the said new power load curve is carried out mark, be divided at least one section according to the said new load curve of naming a person for a particular job of mark;
Obtain the size of the best generation load in arbitrary each section of expensive unit; And with should the value in arbitrary moment all being set to said best generation load value in the period on the generation load curve of this unit, until the generation load curve that obtains every expensive unit whole day;
To the generation load curve of each expensive unit, obtain the required time of transient process that each unit is loaded at every turn and adjusted, and each transient process contains the number of the point on the generation load curve;
With the generation load curve of each transient process according to time sequencing at least one unit interval of translation backward;
Calculate the different unit interval of each transient process translation respectively during number, the size of the total electric cost of whole day is got total cost corresponding generation load curve when minimum.
2. the method for confirming house generator group generation load in advance according to claim 1 is characterized in that the step of the generation load of said definite low-cost generating set specifically comprises:
The mode that all reaches real-time maximum generation ability according to whole day for low-cost unit is confirmed the generation load of this unit.
3. the method for confirming house generator group generation load in advance according to claim 2 is characterized in that, saidly obtains the business electrical load curve and updating steps specifically comprises:
Obtain during the ordinary production of arbitrary operation in the production process of enterprise and power load and time relation curve between turn(a)round; Obtain the business electrical load curve, with the numerical value of each point on the power load curve deduct all low-cost units the generation load value in this moment with.
4. the method for confirming house generator group generation load in advance according to claim 3 is characterized in that, saidly point on the new power load curve is carried out mark comprises:
With the enterprise production maintenance scheduling rise/end constantly, the maintenance scheduling of low-cost unit rise/end constantly and enterprise from the declinable moment of external electric net purchase electricity price, sort according to the time order and function order, and remove the wherein moment of repetition; With on the said new power load curve have a few in said ordering after each constantly identical point carry out mark.
5. the method for confirming house generator group generation load in advance according to claim 4 is characterized in that, the generation load curve of each transient process backward during translation, is further comprised:
Payload between the initial moment of the transient process on the load curve originally after the initial moment and the translation is set to the initial load of transient process.
6. according to claim 4 or the 5 described methods of confirming house generator group generation load in advance, it is characterized in that, said according to after the time sequencing ordering and removing repetition step constantly, also further comprise:
For expensive unit; If consider the influence of the shift system in the unit production process; The zero hour of the process of respectively relieving that then the unit shift system is related to and the moment after the finish time and the said ordering compare; If there is moment of being in during the process of relieving in each after the ordering or repeats with the process zero hour of relieving, the finish time constantly the moment; Then remove the moment that is in during the process of relieving and the moment of repetition, keep and relieve the process zero hour and the finish time; If in the moment that does not have moment of being in during the process of relieving or repeat, then remove relieve the process zero hour and the finish time with the process zero hour of relieving, the finish time.
7. the method for confirming house generator group generation load in advance according to claim 6 is characterized in that, also further comprises after the said step of getting total cost corresponding generation load curve when minimum:
If the moment that last outsourcing electricity price of whole day changes is crest segment to a paddy section; Then the best generation load of each expensive unit is worked as preload according to each unit and issue electric cost order from low to high; The generation load of one by one that cost is minimum unit increases; The increment size is the best generation load curve of this a unit permissible accuracy size; And confirm once the zero-time of each transient process and the unit interval number of translation again, the size of total electric cost when calculating each transient process translation difference unit interval number respectively all reaches identical with last period load until all expensive units; In all results, get total cost when reaching minimum value, each corresponding with it unit generation load curve is the best generation load curve of whole day.
8. the method for confirming house generator group generation load in advance according to claim 7 is characterized in that, the said step that is divided at least one section according to the new load curve of naming a person for a particular job of mark specifically comprises:
According to the time order and function order, first some beginning on said new power load curve is set at the starting point of first period; On curve, search point according to time order backward through mark; Whenever find the point of a mark,, finish the current period this terminal point as the current period; And define a new period; With the starting point of this point, when on load curve, not passing through the point of mark, with the terminal point of last point on the load curve as last period as the new period.
9. the method for confirming house generator group generation load in advance according to claim 8 is characterized in that, the said step of obtaining the best generation load size of expensive unit specifically comprises:
Confirm the maximum permissible load and the minimum permissible load of every generating set, and the size of best generation load permissible accuracy;
Set the interior total generation load size of arbitrary moment of section and be the minimum permissible load size of each unit sum, and self power generation total amount in the calculation of sector;
To all constantly calculate the poor of arbitrary moment power load size and total generation load size in the section, if the power load size adds up difference greater than the size of total generation load, and with the result divided by the section time, be made as this section and purchase electric weight from electrical network; If the power load size is less than the size of total generation load, difference taken absolute value adds up, and with the result divided by the section time, be made as this section to the mains supply amount;
Based on the formation of electric cost, with self power generation total amount in the said section, purchase electric weight and the size of total electric cost in mains supply amount calculation of sector from electrical network;
Get the minimum unit of cost of electricity-generating under current each unit load level; Its load is increased; The increment size is the best generation load curve of this a unit permissible accuracy size; Calculate generation load and increase the self power generation total amount of all generating sets in the section of back, from electrical network purchase electric weight, to the size of mains supply amount and total electric cost, all reach maximum permissible load until all units;
Get the payload of each unit under the minimum situation of total electric cost, be the best generation load of each unit in this section.
10. the method for confirming house generator group generation load in advance according to claim 9; It is characterized in that said at every turn load required time of transient process of adjustment and the step that each transient process contains the number of the point on the generation load curve of each unit of obtaining specifically comprises:
With the size of each load variations amount, obtain the required time of the each transient process of each unit divided by the generation load rate of change of every unit; Each transient process required time divided by the time length between two points on the generation load curve, is rounded numerical value with the result, and the part of not enough integer is got a complete unit interval, obtains the number that each transient process contains the point on the generation load curve.
11. the method for confirming house generator group generation load in advance according to claim 10 is characterized in that, said generation load curve with each transient process step of at least one unit interval of translation backward specifically comprises:
If do not consider the influence in the period of relieving in the unit production process, then:
The calculated moment that begins to overhaul of production maintenance, the moment that returns to normal production, the declinable moment of outsourcing electricity price and point on the generation load plan curve are carried out according to time sequencing corresponding, and will overhaul/relieve initial, overhaul/relieve and stop and electricity price changes and constantly these points carried out mark;
In the corresponding initial moment of transient process in the calculated moment that begins to overhaul of production maintenance, the unit interval number of translation is zero; The moment that returns to normal production, corresponding transient process stopped constantly, and the unit interval number of translation is zero; The declinable moment of outsourcing electricity price, corresponding transient process stopped constantly; The unit interval of calculating translation is during number; Calculate earlier the time length of non-transient process in the next time section, result and this transient process are compared, get wherein smaller value divided by unit interval of unit load curve; The result is rounded numerical value, and the part of not enough integer is got a complete unit interval.
12. the method for confirming house generator group generation load in advance according to claim 10 is characterized in that, said generation load curve with each transient process step of at least one unit interval of translation backward specifically comprises:
If consider the influence in the period of relieving in the unit production process, require unit load constant during relieving, then:
With the initial moment of the process of relieving in the calculated moment that begins to overhaul of production maintenance, the moment that returns to normal production, the unit three-shift system production process, in the unit three-shift system production process the process of relieving termination constantly, the declinable moment of outsourcing electricity price and point on the generation load plan curve carry out according to time sequencing corresponding, and will overhaul/relieve initial, overhaul/relieve and stop and electricity price changes and constantly these points carried out mark;
The termination of the process of relieving in the calculated moment that begins to overhaul of production maintenance and the unit three-shift system production process is the initial moment of corresponding transient process constantly, and the unit interval number of translation is zero; The initial moment of the process of relieving in the moment that returns to normal production and the unit three-shift system production process, corresponding transient process stopped constantly, and the unit interval number of translation is zero; The declinable moment of outsourcing electricity price, corresponding transient process stopped constantly; The unit interval of calculating translation is during number; Calculate earlier the time length of non-transient process in the next time section, result and this transient process are compared, get wherein smaller value divided by unit interval of unit load curve; The result is rounded numerical value, and the part of not enough integer is got a complete unit interval.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103617552A (en) * 2013-11-22 2014-03-05 冶金自动化研究设计院 Power generation cost optimization method for iron and steel enterprise
CN103646349B (en) * 2013-09-27 2017-02-08 华北电力大学 Power load curve segmented identification method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4324987A (en) * 1978-05-26 1982-04-13 Cyborex Laboratories, Inc. System and method for optimizing shed/restore operations for electrical loads
CN102427249A (en) * 2011-12-19 2012-04-25 天津市电力公司 Method and system for controlling distributed micro-grid parallel operation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4324987A (en) * 1978-05-26 1982-04-13 Cyborex Laboratories, Inc. System and method for optimizing shed/restore operations for electrical loads
CN102427249A (en) * 2011-12-19 2012-04-25 天津市电力公司 Method and system for controlling distributed micro-grid parallel operation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103646349B (en) * 2013-09-27 2017-02-08 华北电力大学 Power load curve segmented identification method
CN103617552A (en) * 2013-11-22 2014-03-05 冶金自动化研究设计院 Power generation cost optimization method for iron and steel enterprise
CN103617552B (en) * 2013-11-22 2016-11-16 冶金自动化研究设计院 The method that a kind of iron and steel enterprise cost of electricity-generating optimizes

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