CN106936128B - A kind of power grid receives the appraisal procedure of renewable energy source capability in short term - Google Patents
A kind of power grid receives the appraisal procedure of renewable energy source capability in short term Download PDFInfo
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- H—ELECTRICITY
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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
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Abstract
The present invention relates to electricity market technical field, specifically a kind of power grid receives the appraisal procedure of renewable energy source capability in short term.It includes AGC stand by margin, net load short-term fluctuation value, systematic economy peak modulation capacity, peak-load regulating demand, power grid Transmission Corridor that power grid receives the influence factor of renewable energy source capability in short term；It includes system fm capacity abundant intensity, peak-load regulating ability abundant intensity that power grid receives the evaluation index of renewable energy source capability in short term；The system fm capacity abundant intensity is defined as the ratio of system fm capacity Yu system frequency modulation demand；The ability that power grid receives renewable energy in short term is assessed by calculating system fm capacity abundant intensity, the present invention considers comprehensively, easy to operate, strong applicability.
Description
Technical field
The present invention relates to electricity market technical field, specifically a kind of power grid receives the assessment of renewable energy source capability in short term
Method.
Background technique
It is rapid to clean energy development for China in recent years, according to Chinese the year two thousand fifty high proportion Renewable Energy Development scene and
Path studies have shown that accounts for the 63.6% of total power generation to the annual wind of the year two thousand fifty China, light renewable energy power generation amount.It at high proportion can
The propulsion and development of the renewable sources of energy have been China's energy development normalities.The extensive section using derived from its power generation of wind, solar energy
Can emission reduction benefit, but simultaneously because wind, light power output fluctuation and randomness, increase electric system supply side it is uncertain because
Element.To guarantee Operation of Electric Systems reliability and economy, power grid receives renewable energy source capability to be restricted.Both at home and abroad about
The index that power grid receives wind, light renewable energy source capability to carry out a large amount of research, but proposed at present in short term be only from
The maximum installation scales of part and system two levels reflection wind-powered electricity generations, photoelectricity cannot be provided for network system scheduling and be referred to and not
It can reflect the digestion capability of network system.
Summary of the invention
To solve the above-mentioned problems, the present invention provides the assessment sides that a kind of power grid receives renewable energy source capability in short term
Method, specific technical solution are as follows:
A kind of power grid receive the appraisal procedure of renewable energy source capability in short term the following steps are included:
(1) influence factor that power grid receives renewable energy source capability in short term is chosen:
Power grid receive in short term renewable energy source capability influence factor include AGC stand by margin, net load short-term fluctuation value,
Systematic economy peak modulation capacity, peak-load regulating demand, power grid Transmission Corridor；
(2) determine that power grid receives the evaluation index of renewable energy source capability in short term:
It includes system fm capacity abundant intensity, peak-load regulating energy that power grid receives the evaluation index of renewable energy source capability in short term
Power abundant intensity；The system fm capacity abundant intensity is defined as the ratio of system fm capacity Yu system frequency modulation demand；The system
System peak modulation capacity abundant intensity is defined as the ratio of peak-load regulating ability Yu peak-load regulating demand；
(3) computing system fm capacity:
IfFor system fm capacity, then system fm capacityCalculation formula it is as follows:
RAGCFor the AGC spare capacity of system；
(4) computing system frequency modulation demand:
IfFor system frequency modulation demand, i.e. the minute grade undulating value of net load, then system frequency modulation demandCalculating
Formula is as follows:
Wherein NPtIt is the net load value of t moment, NPt' it is t moment through moving average method treated net load value；
WhereinIt is the load value of t moment,It is the renewable energy power generating value of t moment,
2M is the number for the net load value being averaging in moving average method；
(5) computing system fm capacity abundant intensity:
If βfFor system fm capacity abundant intensity, then system fm capacity abundant intensity βfCalculation formula are as follows:
(6) computing system peak modulation capacity:
IfFor peak-load regulating ability, PieFor the nominal output of unit i, Pi,minIt contributes for the minimum technology of unit i,
NGFor generating set number schedulable in system, then peak-load regulating abilityCalculation method is as follows:
(7) computing system peak regulation demand:
IfFor peak-load regulating demand, PreserveIt is the spinning reserve capacity in load peak period, NPmaxAnd NPminPoint
It is not net load maximum value and net load minimum value, then peak-load regulating demandCalculation method is as follows:
(8) computing system peak modulation capacity abundant intensity:
If βpFor peak-load regulating ability abundant intensity, then peak-load regulating ability abundant intensity βpCalculation formula it is as follows:
Further, the short-term time scale is within day.
Further, AGC stand by margin includes stand by margin under stand by margin and AGC on AGC in the step (1)；It is net negative
Lotus short-term fluctuation value includes scene power output short-term fluctuation value and load short-term fluctuation value；Systematic economy peak modulation capacity includes conventional machine
Group booting plan；Peak-load regulating demand includes that load peak spinning reserve capacity, load peak-valley difference and honourable condensate peak regulation need
It asks.
Further, system fm capacity in the step (2) and step (3)For the frequency modulation frequency modulation ability of power grid.
Further, in the step (3) system AGC spare capacity RAGCTake median.
The invention has the benefit that the present invention receives many factors of renewable energy source capability according to influence power grid in short term
It proposes power grid and receives the index of renewable energy source capability in short term, and the factor and economy that consider influence system operational safety are about
Shu Yinsu systematically has evaluated the ability that power grid receives renewable energy in short term, reflects power grid in short term to renewable energy
Receiving degree, the present invention consider comprehensive, easy to operate, strong applicability.
Specific embodiment
In order to better understand the present invention, the present invention is further explained in the light of specific embodiments:
The short-term time scale that the present invention refers to is within day, and a kind of power grid receives commenting for renewable energy source capability in short term
Estimate method the following steps are included:
(1) influence factor that power grid receives renewable energy source capability in short term is chosen:
Power grid receive in short term renewable energy source capability influence factor include AGC stand by margin, net load short-term fluctuation value,
Systematic economy peak modulation capacity, peak-load regulating demand, power grid Transmission Corridor；For area (similar three backlands of superelevation scene ratio
Area) power grid Transmission Corridor receives ability just to have a certain impact in power grid, and Transmission Corridor does not influence power grid to can under normal circumstances
The receiving ability of the renewable sources of energy.And AGC stand by margin includes stand by margin under stand by margin and AGC on AGC；The short-term wave of net load
Dynamic value includes scene power output short-term fluctuation value and load short-term fluctuation value；Systematic economy peak modulation capacity includes conventional power unit booting meter
It draws；Peak-load regulating demand includes load peak spinning reserve capacity, load peak-valley difference and honourable condensate peak regulation demand, specifically such as
Shown in table 1；
1 power grid of table receives renewable energy factors influencing on ability in short term
(2) determine that power grid receives the evaluation index of renewable energy source capability in short term:
It includes system fm capacity abundant intensity, peak-load regulating energy that power grid receives the evaluation index of renewable energy source capability in short term
Power abundant intensity；System fm capacity abundant intensity is defined as the ratio of system fm capacity Yu system frequency modulation demand；System herein
Fm capacity refers to the frequency modulation frequency modulation ability of power grid；The peak-load regulating ability abundant intensity is defined as peak-load regulating ability and system
The ratio of peak regulation demand；
(3) computing system fm capacity:
IfFor system fm capacity, then system fm capacityCalculation formula it is as follows:
RAGCFor the AGC spare capacity of system, which can be obtained by dispatching of power netwoks department；Since net load fluctuates direction
Uncertainty, it is possible to need AGC to carry out adjusting, it is also possible to carry out lower adjusting, therefore the AGC spare capacity of system
RAGCTake median；
(4) computing system frequency modulation demand:
IfFor system frequency modulation demand, i.e. the minute grade undulating value of net load, then system frequency modulation demandCalculating
Formula is as follows:
Wherein NPtIt is the net load value of t moment, which can be obtained by dispatching of power netwoks department, NPt' it is t moment through cunning
The dynamic method of average treated net load value；
WhereinIt is the load value of t moment,It is the renewable energy power generating value of t moment, which can be by electricity
Traffic department is netted to obtain.
2M is the number for the net load value being averaging in moving average method；The value and renewable energy power generation performance number of M
Sampling with storage the period and roll be averaging Period Length it is related, general value between 3 to 5 relatively rationally；
(5) computing system fm capacity abundant intensity:
If βfFor system fm capacity abundant intensity, then system fm capacity abundant intensity βfCalculation formula are as follows:
(6) computing system peak modulation capacity:
IfFor peak-load regulating ability, PieFor the nominal output of unit i, Pi,minIt contributes for the minimum technology of unit i,
NGFor generating set number schedulable in system, then peak-load regulating abilityCalculation method is as follows:
Wherein Pi,minIt is the minimum technology power output of unit i, the minimum technology power output of fired power generating unit is about nominal output
50% or so, the minimum technology power output of Hydropower Unit needs to be judged according to different water situation and reservoir size, gas engine
The minimum technology power output of group can be 0.
(7) computing system peak regulation demand:
IfFor peak-load regulating demand, PreserveIt is the spinning reserve capacity in load peak period, NPmaxAnd NPminPoint
It is not net load maximum value and net load minimum value, then peak-load regulating demandCalculation method is as follows:
(8) computing system peak modulation capacity abundant intensity:
If βpFor peak-load regulating ability abundant intensity, then peak-load regulating ability abundant intensity βpCalculation formula it is as follows:
Work as βpValue be greater than 100% when, indicate that the peak modulation capacity of system can satisfy peak regulation demand, the receiving of system can be again
Raw energy source capability is stronger, works as βpWhen less than 100%, indicate system due to peak regulation pressure, power grid may face abandonment abandon light or
Depth peak regulation and start and stop peak regulation, the renewable energy amount for reflecting system are supersaturated.
The present invention is not limited to above-described specific embodiment, and the foregoing is merely preferable case study on implementation of the invention
, it is not intended to limit the invention, any modification done within the spirit and principles of the present invention and changes equivalent replacement
Into etc., it should all be included in the protection scope of the present invention.
Claims (5)
1. the appraisal procedure that a kind of power grid receives renewable energy source capability in short term, it is characterised in that: the following steps are included:
(1) influence factor that power grid receives renewable energy source capability in short term is chosen:
It includes AGC stand by margin, net load short-term fluctuation value, system that power grid receives the influence factor of renewable energy source capability in short term
Economical peak load regulation ability, peak-load regulating demand, power grid Transmission Corridor；
(2) determine that power grid receives the evaluation index of renewable energy source capability in short term:
It includes that system fm capacity abundant intensity, peak-load regulating ability are filled that power grid receives the evaluation index of renewable energy source capability in short term
Nargin；The system fm capacity abundant intensity is defined as the ratio of system fm capacity Yu system frequency modulation demand；The system tune
Peak energy power abundant intensity is defined as the ratio of peak-load regulating ability Yu peak-load regulating demand；
(3) computing system fm capacity:
IfFor system fm capacity, then system fm capacityCalculation formula it is as follows:
RAGCFor the AGC spare capacity of system；
(4) computing system frequency modulation demand:
IfFor system frequency modulation demand, i.e. the minute grade undulating value of net load, then system frequency modulation demandCalculation formula such as
Under:
Wherein NPtIt is the net load value of t moment, NP 'tIt is t moment through moving average method treated net load value；
WhereinIt is the load value of t moment,It is the renewable energy power generating value of t moment,
2M is the number for the net load value being averaging in moving average method；
(5) computing system fm capacity abundant intensity:
If βfFor system fm capacity abundant intensity, then system fm capacity abundant intensity βfCalculation formula are as follows:
(6) computing system peak modulation capacity:
IfFor peak-load regulating ability, PieFor the nominal output of unit i, Pi,minIt contributes for the minimum technology of unit i, NGFor
Schedulable generating set number in system, then peak-load regulating abilityCalculation method is as follows:
(7) computing system peak regulation demand:
IfFor peak-load regulating demand, PreserveIt is the spinning reserve capacity in load peak period, NPmaxAnd NPminIt is net respectively
Load maximum value and net load minimum value, then peak-load regulating demandCalculation method is as follows:
(8) computing system peak modulation capacity abundant intensity:
If βpFor peak-load regulating ability abundant intensity, then peak-load regulating ability abundant intensity βpCalculation formula it is as follows:
2. the appraisal procedure that a kind of power grid according to claim 1 receives renewable energy source capability in short term, it is characterised in that:
The short-term time scale is within day.
3. the appraisal procedure that a kind of power grid according to claim 1 receives renewable energy source capability in short term, it is characterised in that:
AGC stand by margin includes stand by margin under stand by margin and AGC on AGC in the step (1)；Net load short-term fluctuation value includes
Scene power output short-term fluctuation value and load short-term fluctuation value；Systematic economy peak modulation capacity includes conventional power unit booting plan；System
Peak regulation demand includes load peak spinning reserve capacity, load peak-valley difference and honourable condensate peak regulation demand.
4. the appraisal procedure that a kind of power grid according to claim 1 receives renewable energy source capability in short term, it is characterised in that:
System fm capacity in the step (2) and step (3)For the frequency modulation frequency modulation ability of power grid.
5. the appraisal procedure that a kind of power grid according to claim 1 receives renewable energy source capability in short term, it is characterised in that:
The AGC spare capacity R of system in the step (3)AGCTake median.
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| CN108683188A (en) * | 2018-06-21 | 2018-10-19 | 福州大学 | Consider that the multiple target wind-powered electricity generation of environmental value and peak regulation abundant intensity receives level optimization |
| CN110768302A (en) * | 2019-08-13 | 2020-02-07 | 华北电力大学 | Evaluation and regulation method for renewable energy consumption capability of regional power grid |
| CN110880756B (en) * | 2019-11-19 | 2021-01-08 | 国网浙江省电力有限公司 | Method for judging peak regulation capacity adequacy of extra-high voltage receiving-end power grid based on peak regulation coefficient |
| CN113489069A (en) * | 2021-07-28 | 2021-10-08 | 广东电网有限责任公司 | Peak regulation balance evaluation method and system for high-proportion renewable energy power system |
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| CN103036251A (en) * | 2012-12-06 | 2013-04-10 | 东北电力大学 | Source network coordinated scheduling method for improving wind electricity admitting ability of power grid |
| CN103715720A (en) * | 2014-01-07 | 2014-04-09 | 哈尔滨工业大学 | High-permeability wind power primary and secondary backup coordination control method |
| CN103810535A (en) * | 2014-01-07 | 2014-05-21 | 广西大学 | Wind power absorption capacity assessment method for electric power system |
| CN105281358A (en) * | 2014-05-30 | 2016-01-27 | 清华大学 | Wind power limit grid-connected capacity calculating method under constraint of frequency modulation and peak-load regulation adequacy |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103036251A (en) * | 2012-12-06 | 2013-04-10 | 东北电力大学 | Source network coordinated scheduling method for improving wind electricity admitting ability of power grid |
| CN103715720A (en) * | 2014-01-07 | 2014-04-09 | 哈尔滨工业大学 | High-permeability wind power primary and secondary backup coordination control method |
| CN103810535A (en) * | 2014-01-07 | 2014-05-21 | 广西大学 | Wind power absorption capacity assessment method for electric power system |
| CN105281358A (en) * | 2014-05-30 | 2016-01-27 | 清华大学 | Wind power limit grid-connected capacity calculating method under constraint of frequency modulation and peak-load regulation adequacy |
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