CN113327177A - Left and right shore power station deviation electric quantity calculation method based on virtual reservoir water level and flow - Google Patents
Left and right shore power station deviation electric quantity calculation method based on virtual reservoir water level and flow Download PDFInfo
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Abstract
According to the method for calculating the deviation electric quantity of the left and right shore power stations based on the water level and the flow of the virtual reservoir, under the condition that the real electric quantity of the left and right power stations does not meet the constraint condition, the electric quantity is increased to meet the constraint condition, the electric quantity added by the part is counted as left and right shore correction electric quantity, the real electric quantity and the correction electric quantity are counted as virtual electric quantity of the power stations, the deviation electric quantity is calculated by the left and right virtual electric quantity, and the deviation electric quantity in the left/right period is calculated: the left bank/right bank generates more electricity according to the electricity distribution proportion, and if the value is positive, the left bank/right bank needs to return electricity to the right bank/left bank; if the value is negative, the right bank/left bank needs to be powered back to the left bank/right bank. Left/right correction electric quantity: and the left/right bank power station calculates left/right day correction electric quantity under the condition that the constraint condition is not met, and if the constraint condition is met, the left/right bank correction electric quantity is 0. On the basis of the virtual reservoir, the invention establishes the deviation electric quantity calculation method which fully considers the comprehensive tasks undertaken by the power station, and realizes the quick, scientific and fair calculation of the deviation electric quantity.
Description
Technical Field
The invention relates to the technical field of water conservancy and hydropower, in particular to a method for calculating the deviation electric quantity of a left shore power station and a right shore power station of the water level and the flow of a virtual reservoir.
Background
The Xiluodi reservoir is positioned at the downstream of the Jinshajiang river and at the junction of the Sichuan and the Yunnan, the power regulations of the left bank and the right bank belong to a national power grid and a southern power grid, the two power stations operate independently, and no electric appliance is connected between the two power stations. The power distribution proportion of the power distribution of the power stations on the left bank and the right bank issued by the national energy agency is 42:58 in the dry period (11-12 months and 1-5 months) and 50:50 in the rich period (6-10 months). According to the agreement of two power grids and a stream ferry power plant: when the actual generated energy of the left bank and the right bank is not balanced according to a specified proportion, the deviation electric quantity needs to be counted, and the deviation electric quantity is processed according to the respective balance modes of daily counting, monthly accumulation, next month processing and withering in principle.
In real-time operation, the two power grids comprehensively consider the aspects of warehouse entry flow forecast, reservoir operation constraint, power utilization requirements of the power grids, line maintenance, power grid safety and the like, and the output of the left bank and the right bank is not arranged according to the electricity distribution proportion absolutely.
According to the agreement signed by the national power grid, the southern power grid and the stream luodie power plant, the deviation electric quantity generated by the left and right shore power stations needs to be adjusted in a rolling way according to the situation, and the electricity distribution proportion is met as much as possible, so the deviation electric quantity is an important basic data for realizing the balance of the electric quantity of the left and right shore power stations according to the proportion.
The existing deviation electric quantity calculation methods have two types:
[1] the method for calculating the deviation electric quantity based on the monthly plan issued by the two power grids comprises the following steps:
in actual operation, the left and right bank annual plans and the month plan issued by the two networks do not meet the distribution proportion, so that the actual electric quantity is difficult to balance according to the distribution proportion in later operation; the method is characterized in that the daily reference electric quantity is based on a monthly plan issued by the two power grids, and the monthly plan is issued to be unbalanced, so that the daily reference electric quantity is unbalanced. The method for calculating the deviation electric quantity cannot correctly reflect the actual electric quantity deviation conditions of the two power stations.
[2] The method for calculating the direct deviation electric quantity based on the real electric quantity comprises the following steps:
the daily reference electric quantity is distributed for the actual generated energy according to the electricity proportion, and the actual deviation electric quantity condition of the left and right shore power stations can be roughly reflected. The stream Luo ferry power station mainly generates power and gives consideration to more comprehensive tasks, and the left and right shore power stations need to undertake corresponding comprehensive tasks while acquiring power generation benefits. The direct deviation electric quantity calculation method based on the actual generated energy does not consider that the left and right bank power stations need to fairly undertake comprehensive tasks, and one power station which undertakes more comprehensive tasks considers that the deviation electric quantity calculated by the method is slightly unfair.
The complex power grid operation and numerous comprehensive tasks of the power station enable the two original methods for calculating the deviation electric quantity not to scientifically and fairly reflect the actual conditions of the power station operation, and the unbalance electric quantity of the two power grids can be adjusted according to the deviation electric quantity calculated by the two methods, so that the two power grids cannot be recognized consistently.
The reason for generating the deviation electric quantity is complex and changeable, the result caused by the deviation electric quantity is irreproducible, the real reservoir operation condition comparison analysis of whether the deviation electric quantity is generated or not can not be carried out, in addition, the deviation electric quantity also has an accumulation effect in time and space, how to quickly, accurately and scientifically calculate the deviation electric quantity is not successful precedent to be circulated so far, and the problem becomes a difficult problem which needs to be solved urgently in scheduling management.
Disclosure of Invention
The invention provides a virtual reservoir-based power station deviation electric quantity calculation method, which is established on the basis of a virtual reservoir and fully considers the comprehensive tasks undertaken by a power station, so that the deviation electric quantity is calculated quickly, scientifically and fairly.
The technical scheme adopted by the invention is as follows:
a power station deviation electric quantity calculating method based on a virtual reservoir,
when the real power generation amount of the left power station and the real power generation amount of the right power station do not meet the constraint condition, increasing the power amount until the constraint condition is met, counting the part of the increased power amount as left and right bank correction power amounts, adding the real power generation amount and the correction power amounts into power station virtual power amounts, and calculating deviation power amounts by using the left and right virtual power amounts;
deviation electric quantity in left/right period: the left bank/right bank generates more electricity according to the electricity distribution proportion, and if the value is positive, the left bank/right bank needs to return electricity to the right bank/left bank; if the numerical value is negative, the right bank/left bank needs to be powered back to the left bank/right bank;
left/right correction electric quantity: and the left/right bank power station calculates left/right day correction electric quantity under the condition that the constraint condition is not met, and if the constraint condition is met, the left/right bank correction electric quantity is 0.
And (4) carrying out the rolling calculation on the deviation electric quantity in the period of the operation of the reservoir, only calculating the daily correction electric quantity, and carrying out the statistical calculation on the daily correction electric quantity.
The electricity distribution proportion of the brook ferry left and right shore power stations is as follows: according to the scheme for electric energy consumption of hydropower stations from Xiluodian to the family dam issued by the national energy supply agency, the electric quantity of the hydropower stations on the left and right banks of the Xiluodian is consumed in a ratio of 42:58 in a dry period (11 months to 5 months in the next year) and in a ratio of 50:50 in a rich period (6 months to 10 months). The actual generated energy of the Xiluodi power station is balanced in the national power grid and the southern power grid according to the proportion in the rich period and the dry period.
The actual reservoir operation is restricted by shipping, water supply, construction, reservoir bank safety, downstream reservoir operation and the like, and a plurality of restriction conditions can be simplified into 5 restriction conditions, including minimum flow restriction, maximum flow restriction, minimum water level restriction, maximum water level restriction and water level amplitude restriction; the actual reservoir flow constraint is converted into left and right bank virtual flow constraint through distribution of power proportion; and (4) water level constraint, wherein the virtual water level is used as a basis for judging whether the constraint is met. The virtual water level calculation is established on the basis of actual reservoir scheduling data, and the virtual water level of the previous day is calculated by using scheduling operation data of the previous day generally on the current day.
The operation of the reservoir is divided into a dry period and a rich period according to different electricity distribution proportions, the electricity balance is carried out by taking natural years as a period, 6 months in the rich period are in a reservoir settlement period, 7 months and 8 months are in flood periods, 9 months are in a water storage period, and after water storage in the middle and the last ten days of 9 months is finished, the operation period of the reservoir is in a high water level operation period, so that the operation mode of the reservoir is converted quickly. The reservoir operation natural year can be divided into a plurality of operation periods according to factors such as distribution ratio, operation characteristics, electric quantity settlement period and the like, and the deviation electric quantity can be continuously calculated in a rolling manner in the operation periods.
The power station deviation electric quantity calculation method based on the virtual reservoir has the following beneficial effects:
1: on the basis of the virtual reservoir, the invention establishes the deviation electric quantity calculation method which fully considers the comprehensive tasks undertaken by the power station, and realizes the quick, scientific and fair calculation of the deviation electric quantity.
2: according to the invention, through calculation of the deviation electric quantity, less return electric quantity of the comprehensive task is borne, more return electric quantity of the comprehensive task is borne, the reward and punishment on the power grid are reasonable, the power grid is promoted to actively optimize the operation of the power station at one side of the power grid, and the safe operation of the power station is facilitated.
3: with the development of hydropower utilities in China, more and more reservoirs are located in the national and provincial boundaries, and the virtual reservoir-based deviation electric quantity calculation method has certain popularization value in the evaluation of the reservoirs which belong to different interest bodies after operation.
Detailed Description
A power station deviation electric quantity calculation method based on a virtual reservoir has the following principle:
the concept of the virtual reservoir, namely the principle of allocating reservoir resources based on the electricity distribution proportion is called 'electricity distribution' hereinafter, the water storage quantity, the reservoir capacity and the like are allocated according to the electricity distribution proportion, and the left bank virtual reservoir and the right bank virtual reservoir are respectively established corresponding to the left bank power station and the right bank power station.
The virtual reservoir considers that the left reservoir and the right reservoir are completely independent and do not support each other, the virtual reservoir needs to run for bearing comprehensive tasks according to a distribution ratio, and if the running mode of a power station on one side possibly breaks through a constraint condition, the virtual reservoir is adjusted in real-time scheduling; but in the virtual reservoir calculation, according to the calculation meeting the constraint, the virtual outlet water quantity generated for meeting the constraint is automatically abandoned on one side and removed from the distributed water quantity.
The actual reservoir operation is restricted by shipping, water supply, construction, bank safety, downstream reservoir operation and the like, and a plurality of restrictions can be simplified into 5 restrictions: the system comprises a minimum flow constraint, a maximum flow constraint, a minimum water level constraint, a maximum water level constraint and a water level amplitude constraint, wherein the actual reservoir flow related constraint is converted into left and right bank virtual flow constraints through power distribution proportion distribution, and the water level related constraint takes the virtual water level as a basis for judging whether the constraints are met.
The virtual water level is calculated on the basis of actual reservoir scheduling data, the initial actual water level is used as the initial water level, the actual power generation operation condition is used for measuring and calculating the virtual water level in a continuous period, and the specific stages are shown in table 1. The current day generally uses the scheduled operation data of the previous day to calculate the virtual water level of the previous day. In the period, the virtual water levels on the two sides are consistent as much as possible, and if the virtual water levels are inconsistent, the later operation can be guided by counting the deviation electric quantity in the left/right bank period.
And in the calculation of the deviation electric quantity, whether the constraint is met is judged according to the virtual water level and the virtual flow of the left and right bank virtual reservoirs. And under the condition that the actual power generation amount of the left power station and the actual power generation amount of the right power station do not meet the constraint condition, increasing the power to meet the constraint condition, and counting the increased power as left and right bank correction power (abbreviated as left power correction power and right power correction power). And adding the correction electric quantity to the actual electric quantity to obtain a virtual electric quantity of the power station, and calculating the deviation electric quantity by using the left virtual electric quantity and the right virtual electric quantity.
Deviation electric quantity in left/right period: the left bank/right bank is charged more power according to the power distribution proportion, if the numerical value is positive, the left bank/right bank is required to return power to the right bank/left bank, and if the numerical value is negative, the right bank/left bank is required to return power to the left bank/right bank.
Left/right correction electric quantity: and the left/right bank power station calculates left/right day correction electric quantity under the condition that the constraint condition is not met, and if the constraint condition is met, the left/right bank correction electric quantity is 0.
According to the operation stages of the reservoir shown in the table 1, the deviation electric quantity is calculated in a rolling mode in the period, and because the actual power generation quantities of the power stations on the two sides exist objectively, only daily correction electric quantity needs to be calculated in actual operation, and the statistical calculation of the in-period correction electric quantity is carried out.
TABLE 1 Ixi Luo Du virtual water level in-phase segmentation table
The method for calculating the deviation electric quantity comprises the following steps:
1 basic formula:
1.1 the warehousing flow is less than the full sending flow:
VEi＝Eqi+XEi (1)
in formula 1:
VEione side of the virtual reservoir is used as virtual electric quantity;
Eqiis one-side actual power generation amount;
XEicorrecting the electric quantity for one side; the system is a left bank virtual reservoir in 1 hour, and is a right bank virtual reservoir in 2 hours.
In formula 2:
SEiis a side reference electric quantity;
VEione side of the virtual reservoir is used as virtual electric quantity;
piis the distribution ratio of the virtual reservoir at one side.
DEi＝VEi-SEi (3)
In formula 3:
DEiis a one-sided offset electrical quantity;
DE1＝-DE2 (4)
in formula 4:
DE1the left bank deviation electric quantity;
DE2is the right bank offset power.
1.2 the warehousing flow is greater than the full sending flow:
the deviation electric quantity of the left side and the right side is 0.
1. And (3) daily correction electric quantity calculation:
1.1. and (3) calculating the daily correction electric quantity when the warehousing flow is less than the full sending flow:
aiming at the condition that the operation of the reservoir in dry seasons is restrained by factors such as shipping, water supply, construction, reservoir bank safety, downstream reservoir operation and the like, the adjustable space is small, and the left/right bank power station calculates the correction electric quantity under the condition that the restraint condition is not met. Repair thePositive electric power is classified into three types: correcting electric quantityMinimum flowCorrecting the electric quantityWater level exceeding upper limitAnd correcting the amount of electricityWater level over-lower limit。
1) Minimum flow restriction:
only left bank did not reach allocated minimum flow:
(XE1,t)min q＝E(△q1,t) (5)
only the right bank did not reach the minimum flow allocated:
(XE2,t)min q＝E(△q2,t) (6)
neither left/right bank reached the minimum flow allocated:
both left/right banks reach the minimum flow allocated:
(XEi,t)min q＝0 (7)
in formulas 5, 6, and 7:
(XEi,t)minqdaily correction power generated for one side violating the minimum flow constraint;
E(△qi,t) The daily electric quantity generated by the virtual ex-warehouse flow is the electric quantity corresponding to the minimum flow on one side minus the actual generated energy.
2) Limiting the highest water level:
the virtual water level of the left bank exceeds the upper limit, and the virtual water level of the right bank does not exceed the upper limit:
(XE1,t)max h＝E(△q1,t) (8)
the virtual water level of the right bank exceeds the upper limit, and the virtual water level of the left bank does not exceed the upper limit:
(XE2,t)max h＝E(△q2,t) (9)
the virtual water level of the left/right bank exceeds the upper limit:
the virtual water level of the left/right bank does not exceed the upper limit:
(XEi,t)max h＝0 (10)
in formulas 8, 9, and 10:
(XEi,t)maxha daily correction power amount generated by one side violating the maximum water level constraint;
E(△qi,t) Virtual outbound streamingThe daily electric quantity generated is the daily electric quantity corresponding to the flow rate on one side for avoiding the increase of the virtual waste water on the basis of the actual flow rate of the discharged water;
3) and limiting the lowest water level:
the virtual water level of the left bank is lower than the lower limit, and the virtual water level of the right bank is higher than the lower limit
(XE1,t)min h＝F1,t-1-F1,t (11)
The virtual water level of the right bank is lower than the lower limit, and the virtual water level of the left bank is higher than the lower limit
(XE2,t)min h＝F2,t-1-F2,t (12)
The left/right bank virtual water levels are all lower than the lower limit:
the left/right bank virtual water level is higher than the lower limit:
(XEi,t)min h＝0 (13)
in formulas 11, 12, and 13:
(XEi,t)minhcorrecting the amount of electricity for one side due to the violation of the lowest constraint;
Fi,t-1the energy storage electric quantity corresponding to the virtual water level of the previous day of the reservoir on one side is obtained;
Fi,tthe energy storage electric quantity corresponding to the current day virtual water level of the reservoir on one side is obtained.
1.2. And (3) calculating the daily correction electric quantity when the warehousing flow is larger than the full sending flow:
the warehousing flow is larger than the full power generation flow, the power stations on the two sides generate power according to the maximum capacity, the unbalanced electric quantity generated in the early stage cannot be balanced in the later stage, and therefore the deviation electric quantity is 0 in the condition.
2. An intra-period correction energy algorithm:
2.1. warehousing is less than full sending flow:
considering a buffer space which needs to be adjusted after two power grids violate constraints, thresholds are respectively set for the minimum flow of the correction electric quantity in a period, the upper limit of the correction electric quantity in the period and the upper limit of the correction electric quantity in the period, wherein the upper limit of the correction electric quantity in the period and the upper limit of the correction electric quantity in the period are accumulated and calculated for the correction electric quantity in the period, the upper limit of the water level of the upper limit of the correction electric quantity in the period is the set upper limit of the water level plus the threshold, and the lower limit of the water level calculated for the upper limit of the correction electric quantity in the period is the set lower limit of the water level minus the threshold; and the minimum flow of the correction electric quantity in the period is counted after the accumulated value is larger than the set threshold value of the electric quantity. The determination of the relevant threshold is determined after negotiation between the two power grids and the power plant.
In formula 14:
XEicorrecting the electric quantity for one side of the virtual reservoir in the period;
(XEi,t)minqdaily correction power generated for one side violating the minimum flow constraint;
(XEi,t)minha daily correction power amount generated by one side violating the lowest water level constraint;
(XEi,t)maxha daily correction power amount generated by one side violating the maximum water level constraint;
(DEi)minqa threshold value of the minimum flow of the correction electric quantity in a side period;
(DHi)minha threshold corresponding to the lowest water level on one side;
(DHi)maxhis a threshold value corresponding to the highest water level on one side;
2.2. warehousing more than full sending flow:
the correction electric quantity in the accumulation period is not calculated, and the deviation electric quantity is 0.
3. Calculation example:
from table 2, it can be seen that the left stream and the right stream of the dry season generate 20.2 hundred million kw.h in 2016 in a super-proportional mode, but the corrected power is 4.11 hundred million kw.h, which is 10.15 hundred million kw.h less than the right stream, and the deviation power is calculated by a new algorithm considering comprehensive responsibilities to be 3.61 hundred million kw.h less than the original algorithm, so that the right return stream power of the left stream and the dry season is greatly reduced, and one party who bears more comprehensive tasks and less range power station constraints is encouraged.
Meter 22016 year lineage left and right shore power station deviation electric quantity measuring meter
Remarking: the deviation electric quantity (real power generation) is directly obtained by adding left and right real power generation quantities and multiplying the sum by a power distribution ratio to be used as a reference electric quantity, and one real power generation quantity subtracts the reference electric quantity to be used as the deviation electric quantity;
and b, calculating the corrected electric quantity on the basis of the virtual reservoir, and considering the method for calculating the deviation electric quantity by combining the corrected electric quantity with the actual electric quantity, namely the novel method provided by the invention.
Claims (4)
1. Left and right shore power station deviation electric quantity calculation method based on virtual reservoir water level and flow is characterized by comprising the following steps:
(1): calculating left/right bank deviation electric quantity;
(2): calculating daily correction electric quantity;
(3): and (4) correcting the electric quantity algorithm within the period.
2. The method for calculating the left and right shore power station deviation electric quantity based on the water level and the flow of the virtual reservoir as claimed in claim 1, wherein: the calculation of the left/right bank deviation electric quantity comprises the following steps:
1.1. the warehousing flow is less than the full sending flow:
VEi＝Eqi+XEi (1)
in formula 1:
VEione side of the virtual reservoir is used as virtual electric quantity;
Eqiis one-side actual power generation amount;
XEicorrecting the electric quantity for one side; 1 time is a left bank virtual reservoir, and 2 time is a right bank virtual reservoir;
in formula 2:
SEiis a side reference electric quantity;
VEiis one-sided virtualVirtual electric quantity of the reservoir;
pithe distribution ratio of the virtual reservoir at one side is obtained;
DEi＝VEi-SEi (3)
in formula 3:
DEiis a one-sided offset electrical quantity;
DE1＝-DE2 (4)
in formula 4:
DE1the left bank deviation electric quantity;
DE2the right bank deviation electric quantity;
1.2. the warehousing flow is greater than the full sending flow:
the deviation electric quantity of the left side and the right side is 0.
3. The method for calculating the left and right shore power station deviation electric quantity based on the water level and the flow of the virtual reservoir as claimed in claim 1, wherein: the daily correction electric quantity calculation comprises the following steps:
2.1, calculating the daily correction electric quantity when the warehousing flow is less than the full sending flow:
aiming at the restriction of the operation of the reservoir in dry seasons by shipping, water supply, construction, reservoir bank safety and downstream reservoir operation factors, calculating correction electric quantity by a left/right bank power station under the condition that the restriction condition is not met; the correction electric quantity is divided into three types: correcting electric quantityMinimum flowCorrecting the electric quantityWater level exceeding upper limitAnd correcting the amount of electricityWater level over-lower limit；
1) Minimum flow restriction:
only left bank did not reach allocated minimum flow:
(XE1,t)minq＝E(△q1,t) (5)
only the right bank did not reach the minimum flow allocated:
(XE2,t)minq＝E(△q2,t) (6)
other cases are as follows:
(XEi,t)minq＝0 (7)
in formulas 5, 6, and 7:
(XEi,t)minqdaily correction power generated for one side violating the minimum flow constraint;
E(△qi,t) The daily electric quantity generated by the virtual ex-warehouse flow is the electric quantity corresponding to the minimum flow on one side minus the actual generated energy;
2) limiting the highest water level:
the virtual water level of the left bank exceeds the upper limit, and the virtual water level of the right bank does not exceed the upper limit:
(XE1,t)maxh＝E(△q1,t) (8)
the virtual water level of the right bank exceeds the upper limit, and the virtual water level of the left bank does not exceed the upper limit:
(XE2,t)maxh＝E(△q2,t) (9)
other cases are as follows:
(XEi,t)maxh＝0 (10)
in formulas 8, 9, and 10:
(XEi,t)maxha daily correction power amount generated by one side violating the maximum water level constraint;
E(△qi,t) The daily electric quantity generated by the virtual ex-warehouse flow is the daily electric quantity corresponding to the flow, wherein one side of the daily electric quantity is used for avoiding the increase of the virtual abandoned water on the basis of the actual ex-warehouse flow;
3) limiting the lowest water level:
the virtual water level of the left bank is lower than the lower limit, and the virtual water level of the right bank is higher than the lower limit:
(XE1,t)minh＝F1,t-1-F1,t (11)
the virtual water level of the right bank is lower than the lower limit, and the virtual water level of the left bank is higher than the lower limit:
(XE2,t)minh＝F2,t-1-F2,t (12)
other cases are as follows:
(XEi,t)minh＝0 (13)
in formulas 11, 12, and 13:
(XEi,t)minhcorrecting the amount of electricity for one side due to the violation of the lowest constraint;
Fi,t-1the energy storage electric quantity corresponding to the virtual water level of the previous day of the reservoir on one side is obtained;
Fi,tthe energy storage electric quantity corresponding to the current day virtual water level of the reservoir on one side;
2.2, calculating the daily correction electric quantity when the warehousing flow is larger than the full sending flow:
the warehousing flow is larger than the full power generation flow, the power stations on the two sides generate power according to the maximum capacity, the unbalanced electric quantity generated in the early stage cannot be balanced in the later stage, and therefore the deviation electric quantity is 0 in the condition.
4. The method for calculating the left and right shore power station deviation electric quantity based on the water level and the flow of the virtual reservoir as claimed in claim 1, wherein: the intra-phase correction energy algorithm comprises:
3.1, warehousing is less than full distribution flow:
considering a buffer space which needs to be adjusted after two power grids violate constraints, thresholds are respectively set for the minimum flow of the correction electric quantity in a period, the upper limit of the correction electric quantity in the period and the upper limit of the correction electric quantity in the period, wherein the upper limit of the correction electric quantity in the period and the upper limit of the correction electric quantity in the period are accumulated and calculated for the correction electric quantity in the period, the upper limit of the water level of the upper limit of the correction electric quantity in the period is the set upper limit of the water level plus the threshold, and the lower limit of the water level calculated for the upper limit of the correction electric quantity in the period is the set lower limit of the water level minus the threshold; the minimum flow of the correction electric quantity in the period is counted after the accumulated value is larger than a set threshold value of the electric quantity, and the determination of the related threshold value is determined after negotiation between the two power grids and the power plant;
in formula 14:
XEicorrecting the electric quantity for one side of the virtual reservoir in the period;
(XEi,t)minqdaily correction power generated for one side violating the minimum flow constraint;
(XEi,t)minha daily correction power amount generated by one side violating the lowest water level constraint;
(XEi,t)maxhgenerated for one side violating the maximum water level constraintCorrecting the electric quantity every day;
(DEi)minqa threshold value of the minimum flow of the correction electric quantity in a side period;
(DHi)minha threshold corresponding to the lowest water level on one side;
(DHi)maxhis a threshold value corresponding to the highest water level on one side;
3.2 warehousing is more than full sending flow:
the correction electric quantity in the accumulation period is not calculated, and the deviation electric quantity is 0.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103971181A (en) * | 2014-05-20 | 2014-08-06 | 河海大学 | Day-ahead economic dispatch method for virtual power plant |
| CA3016276A1 (en) * | 2016-03-08 | 2017-09-14 | Mitsubishi Electric Corporation | Laser light source device and method for controlling same |
| CN108470249A (en) * | 2018-03-16 | 2018-08-31 | 大连理工大学 | A kind of Hydropower Stations short-term electricity generation dispatching method of coupling clustering and decision tree |
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|---|---|---|---|---|
| CN103425704B (en) * | 2012-05-24 | 2017-07-21 | 阿里巴巴集团控股有限公司 | Application interface provides method and device |
| CN103745023B (en) * | 2013-11-22 | 2015-08-12 | 华中科技大学 | Hydropower station scheme of exerting oneself makes and optimum load dispatch coupling modeling method |
| CN105303318A (en) * | 2015-10-30 | 2016-02-03 | 国家电网公司 | Trans-regional power grid transaction settlement processing method based on deviation electric quantity responsibility judgment |
| CN106570744A (en) * | 2016-10-26 | 2017-04-19 | 清华大学 | Electric power transaction settlement method considering deviation electric quantity hierarchical processing and transaction component ranking |
| CN107392432B (en) * | 2017-06-27 | 2020-10-09 | 东南大学 | Frequency modulation standby market realization method considering medium and long term electric quantity contract decomposition |
-
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103971181A (en) * | 2014-05-20 | 2014-08-06 | 河海大学 | Day-ahead economic dispatch method for virtual power plant |
| CA3016276A1 (en) * | 2016-03-08 | 2017-09-14 | Mitsubishi Electric Corporation | Laser light source device and method for controlling same |
| CN108470249A (en) * | 2018-03-16 | 2018-08-31 | 大连理工大学 | A kind of Hydropower Stations short-term electricity generation dispatching method of coupling clustering and decision tree |
Non-Patent Citations (2)
| Title |
|---|
| 李竹等: "跨区跨省电力交易中的偏差电量分析与基于虚拟分时电价的偏差电量处理方法", 《电力建设》 * |
| 王皓靖等: "基于遗传算法的虚拟电厂经济性分析", 《电器与能效管理技术》 * |
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