CN107732981A - A kind of level of factory AGC system allocation strategy optimization method for meeting electric network security - Google Patents
A kind of level of factory AGC system allocation strategy optimization method for meeting electric network security Download PDFInfo
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- CN107732981A CN107732981A CN201711096331.XA CN201711096331A CN107732981A CN 107732981 A CN107732981 A CN 107732981A CN 201711096331 A CN201711096331 A CN 201711096331A CN 107732981 A CN107732981 A CN 107732981A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
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Abstract
The invention discloses a kind of level of factory AGC system allocation strategy optimization method for meeting electric network security, after the theory target load of some units reaches spinning reserve limit value in advance, unnecessary capacity can be distributed to other units, other units are waited to reach limit value point together in spinning reserve limit value point, until the instruction of full factory's total load exceedes total spinning reserve limit value, the target load of each unit just may proceed to etc. than increase, the spinning reserve capacity of each unit is thus effectively guaranteed, meets the security requirement of power network.
Description
Technical field
The present invention relates to thermal power plant level of factory Automatic Generation Control (AGC) technical field, more particularly to one kind to meet that power network is pacified
The level of factory AGC system allocation strategy optimization method of full property.
Background technology
The plant-level automatic generation control system of thermal power plant utilizes one after the level of factory total load for receiving scheduling station instructs
Fixed allocation strategy, total load Command Resolution is the load instruction of each single unit, then is issued to the DCS system of unit,
Control unit reaches target load.
The load distribution strategy of existing thermal power plant's level of factory AGC system, typically using the net coal consumption rate characteristic of each unit
Curve and equal incremental rate criterion, calculate the target load that each unit is undertaken so that total net coal consumption rate amount of full factory is most
It is low, improve the economic benefit of power plant.According to this method, the net coal consumption rate characteristic of each unit is bent in the factory for participating in regulation and control
In the case that line gap is larger, the problem of target load level disparity between each unit is larger, net coal consumption rate just occurs
Relatively low unit target load close to rated load, and net coal consumption rate it is higher unit target load it is then negative well below specified
Lotus, this, which is just unsatisfactory for power network, must leave the requirement of sufficient spinning reserve capacity to each unit, need urgent peak regulation in power network
Deng in particular cases, it will influence the security of power network.
The content of the invention
Based on technical problem existing for background technology, the present invention proposes a kind of level of factory AGC systems for meeting electric network security
System allocation strategy optimization method.
A kind of level of factory AGC system allocation strategy optimization method for meeting electric network security proposed by the present invention, including it is following
Step：
S1, after full factory's total load instruction that scheduling station issues is received, first according to basic net coal consumption rate characteristic
Curve and equal incremental rate criterion, calculate the theory target load of each unit；
S2, the rated load according to unit and default spinning reserve coefficient, calculate the spinning reserve of each unit
Limit value, theory target load is obtained with the difference of spinning reserve limit value as spinning reserve difference；
S3, judge whether the spinning reserve difference of unit for just；
It is S4, no, then using the theory target load of each unit as realistic objective load；
S5, it is the spinning reserve difference for all units that then add up, to draw full factory's spinning reserve difference；
S6, judge full factory's spinning reserve difference whether be on the occasion of；
S7, it is that full factory's spinning reserve difference is distributed into each unit as apportioning cost, each machine according to default distribution model
The realistic objective load of group is the spinning reserve limit value and apportioning cost sum of unit；
It is S8, no, then the spinning reserve difference of each unit is detected one by one, when the spinning reserve difference of unit just, then to set
The realistic objective load of unit is the spinning reserve limit value of unit；Then by full factory's spinning reserve difference according to default distribution mould
For each unit that type distributes to spinning reserve difference to bear as apportioning cost, spinning reserve difference is the realistic objective for each unit born
Load is the spinning reserve limit value and apportioning cost sum of unit；
S9, the DCS system that the realistic objective load of all units is issued to unit.
Preferably, default distribution model is：Full factory's spinning reserve difference is carried out according to similar unit residual capacity etc.
Score is matched somebody with somebody.
Preferably, step S8 specifically includes following steps：
S81, by unit spinning reserve difference be on the occasion of unit set formed first queue, by unit spinning reserve difference
Second queue is formed for negative value set；
The realistic objective load of each unit in S82, first queue is the spinning reserve limit value of unit；
S83, using full factory's spinning reserve difference according to default distribution model distribute in second queue each unit as point
With value, the realistic objective load of each unit is the spinning reserve limit value and apportioning cost sum of unit in second queue.
A kind of level of factory AGC system allocation strategy optimization method for meeting electric network security proposed by the present invention, in some machines
After the theory target load of group reaches spinning reserve limit value in advance, unnecessary capacity can be distributed to other units, that is, revolved
Turning standby limit value point waits other units to reach limit value point together, exceedes total spinning reserve limit value until full factory's total load instructs,
The target load of each unit just may proceed to etc., than increase, to be thus effectively guaranteed the spinning reserve capacity of each unit,
Meet the security requirement of power network.
The present invention is in order to solve the problems, such as that each unit target load level disparity is larger, in the distribution of level of factory AGC system
Analysis logic of the increase to unit spinning reserve capacity in strategy, when the instruction of full factory's total load is not up to spinning reserve level,
The target load of each unit is not more than spinning reserve limit value, prevents because net coal consumption rate characteristic curve gap is larger between unit
Etc. reason, cause some unit target loads too high, take the situation of spinning reserve capacity in advance.
Brief description of the drawings
Fig. 1 is a kind of level of factory AGC system allocation strategy optimization method flow for meeting electric network security proposed by the present invention
Figure.
Embodiment
Reference picture 1, a kind of level of factory AGC system allocation strategy optimization method for meeting electric network security proposed by the present invention,
Comprise the following steps.
S1, after full factory's total load instruction that scheduling station issues is received, first according to basic net coal consumption rate characteristic
Curve and equal incremental rate criterion, calculate the theory target load P of each unitK targets, k is the sequence number of each unit.
S2, the rated load P according to unitK is specifiedAnd default spinning reserve coefficient fk, calculate the rotation of each unit
Standby limit value PK limit values, obtain theory target load PK targetsWith spinning reserve limit value PK limit valuesDifference as spinning reserve difference EK rotates。
That is,Wherein, n is unit quantity.
S3, the spinning reserve difference of unit is judged whether just, that is, to judge EK rotates|The n of k=1,2,3 ...≤ 0 whether always into
It is vertical.
It is S4, no, then by the theory target load P of each unitK targetsAs realistic objective load PK is actual。
S5, it is the spinning reserve difference for all units that then add up, to draw full factory's spinning reserve difference EAlways, i.e.,：
S6, judge full factory's spinning reserve difference EAlwaysWhether be on the occasion of.
S7, it is, by full factory's spinning reserve difference EAlwaysEach unit is distributed to as apportioning cost Q according to default distribution modelk,
The realistic objective load P of each unitK is actualFor the spinning reserve limit value P of unitK limit valuesWith apportioning cost QkSum, i.e.,：
In present embodiment, default distribution model is：By full factory's spinning reserve difference according to similar unit residual capacity
Carry out waiting score to match somebody with somebody.
I.e.：
It is S81, no, then by unit spinning reserve difference be on the occasion of unit set form first queue, unit is rotated standby
It is that negative value set forms second queue with difference.
The realistic objective load of each unit in S82, first queue is the spinning reserve limit value of unit.
S83, using full factory's spinning reserve difference according to default distribution model distribute in second queue each unit as point
With value, the realistic objective load of each unit is the spinning reserve limit value and apportioning cost sum of unit in second queue.
It is assumed that unit quantity is x in first queue, unit quantity is y in second queue.
Then：
Wherein, i be first queue in unit sequence number, i=1,2 ... x；J be first queue in unit sequence number, j=
1、2……y。
In this way, with reference to S81 to S83, the spinning reserve difference of each unit is detected one by one, when the spinning reserve difference of unit is
Just, then the realistic objective load for setting unit is the spinning reserve limit value of unit.Then by full factory's spinning reserve difference according to pre-
If distribution model distribute to spinning reserve difference and be used as apportioning cost for negative each unit, spinning reserve difference is each unit for bearing
Realistic objective load for unit spinning reserve limit value and apportioning cost sum.S9, by under the realistic objective load of all units
It is sent to the DCS system of unit.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (3)
1. a kind of level of factory AGC system allocation strategy optimization method for meeting electric network security, it is characterised in that including following step
Suddenly：
S1, after full factory's total load instruction that scheduling station issues is received, first according to basic net coal consumption rate characteristic curve
And equal incremental rate criterion, calculate the theory target load of each unit；
S2, the rated load according to unit and default spinning reserve coefficient, the spinning reserve limit value of each unit is calculated,
Theory target load is obtained with the difference of spinning reserve limit value as spinning reserve difference；
S3, judge whether the spinning reserve difference of unit for just；
It is S4, no, then using the theory target load of each unit as realistic objective load；
S5, it is the spinning reserve difference for all units that then add up, to draw full factory's spinning reserve difference；
S6, judge full factory's spinning reserve difference whether be on the occasion of；
S7, it is that full factory's spinning reserve difference is distributed into each unit as apportioning cost according to default distribution model, each unit
Realistic objective load is the spinning reserve limit value and apportioning cost sum of unit；
It is S8, no, then the spinning reserve difference of each unit is detected one by one, when the spinning reserve difference of unit just, then to set unit
Realistic objective load be unit spinning reserve limit value；Then by full factory's spinning reserve difference according to default distribution model point
Dispensing spinning reserve difference is used as apportioning cost for negative each unit, and spinning reserve difference is the realistic objective load for each unit born
For the spinning reserve limit value and apportioning cost sum of unit；
S9, the DCS system that the realistic objective load of all units is issued to unit.
2. the level of factory AGC system allocation strategy optimization method as claimed in claim 1 for meeting electric network security, its feature exist
In default distribution model is：By full factory's spinning reserve difference, according to similar unit residual capacity is carried out etc., score is matched somebody with somebody.
3. the level of factory AGC system allocation strategy optimization method as claimed in claim 1 or 2 for meeting electric network security, its feature
It is, step S8 specifically includes following steps：
S81, by unit spinning reserve difference be on the occasion of unit set formed first queue, be negative by unit spinning reserve difference
Value set forms second queue；
The realistic objective load of each unit in S82, first queue is the spinning reserve limit value of unit；
S83, full factory's spinning reserve difference distributed into second queue each unit as apportioning cost according to default distribution model,
The realistic objective load of each unit is the spinning reserve limit value and apportioning cost sum of unit in second queue.
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Citations (5)
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| CN102170129A (en) * | 2011-04-22 | 2011-08-31 | 武汉大学 | Low-carbon dispatching method and device for electric power system based on large-scale wind power grid connection |
| CN102426689A (en) * | 2011-08-23 | 2012-04-25 | 浙江大学 | Set combination optimization method based on BPSO and Lagrange multiplier algorithm |
| CN105098843A (en) * | 2015-08-25 | 2015-11-25 | 南京南瑞继保电气有限公司 | Power plant level automatic power generation control system applied load optimizing and distributing method and system |
| US20160092622A1 (en) * | 2013-05-20 | 2016-03-31 | State Grid Corporation Of China | Method for modeling medium and long term wind power output model of medium and long term optimal operationof power system |
| CN107834609A (en) * | 2017-11-06 | 2018-03-23 | 安徽立卓智能电网科技有限公司 | A kind of level of factory AGC system allocation strategy optimization method for improving set steady |
-
2017
- 2017-11-09 CN CN201711096331.XA patent/CN107732981B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170129A (en) * | 2011-04-22 | 2011-08-31 | 武汉大学 | Low-carbon dispatching method and device for electric power system based on large-scale wind power grid connection |
| CN102426689A (en) * | 2011-08-23 | 2012-04-25 | 浙江大学 | Set combination optimization method based on BPSO and Lagrange multiplier algorithm |
| US20160092622A1 (en) * | 2013-05-20 | 2016-03-31 | State Grid Corporation Of China | Method for modeling medium and long term wind power output model of medium and long term optimal operationof power system |
| CN105098843A (en) * | 2015-08-25 | 2015-11-25 | 南京南瑞继保电气有限公司 | Power plant level automatic power generation control system applied load optimizing and distributing method and system |
| CN105098843B (en) * | 2015-08-25 | 2017-05-17 | 南京南瑞继保电气有限公司 | Power plant level automatic power generation control system applied load optimizing and distributing method and system |
| CN107834609A (en) * | 2017-11-06 | 2018-03-23 | 安徽立卓智能电网科技有限公司 | A kind of level of factory AGC system allocation strategy optimization method for improving set steady |
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Inventor after: Liang Xiao Inventor after: Wang Tongyi Inventor after: Yin Jun Inventor after: Xie Zhidong Inventor after: Chai Dongyuan Inventor after: Ji Shengkai Inventor after: Wen Quan Inventor after: Cheng Qi Inventor before: Wang Tongyi Inventor before: Yin Jun Inventor before: Xie Zhidong Inventor before: Chai Dongyuan Inventor before: Ji Shengkai Inventor before: Wen Quan Inventor before: Cheng Qi |
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Effective date of registration: 20211228 Address after: 230601 floors 1-4, No. C-12 East, standardized plant, industrial investment Liheng industrial Plaza, Taohua Industrial Park, prosperous West Road, Feixi County, Hefei City, Anhui Province Patentee after: LEADZONE SMART GRID TECHNOLOGY Co.,Ltd. Patentee after: State Grid Anhui Electric Power Co., Ltd Address before: 230601 building C12, gongtou Liheng industrial Plaza, the intersection of Fanhua Avenue and Wenshan Road, Feixi County, Hefei City, Anhui Province Patentee before: LEADZONE SMART GRID TECHNOLOGY Co.,Ltd. |