CN107133749A - A kind of power information physical coupling modeling method for considering demand response information - Google Patents
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- 238000010586 diagram Methods 0.000 description 2
- 238000003303 reheating Methods 0.000 description 2
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- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
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Abstract
The invention discloses a kind of power information physical coupling modeling method for considering demand response information, belong to power information physical system analysis technical field.The present invention is directed to the frequency stabilization control problem in power information physical coupling system, propose to participate in system frequency control process using demand response resource, demand response feedback control loop is added in legacy frequencies response model, the feedback loop considers that demand response participates in the characteristics such as ability and the information system communication delay of system frequency modulation, sets up power information physical coupling model.The present invention realizes being closely connected for information side and physical side in power information physical coupling system, substantially increases the frequency stability of power system.
Description
Technical field
The invention belongs to power information physical system analysis technical field, specifically the present invention relates to a kind of consideration demand
The power information physical coupling modeling method of response message.
Background technology
Information physical system (CPS, Cyber-Physical Systems), also known as information physical emerging system, information thing
Coupled system is managed, refers to computing system, communication network and physical environment combine together by 3C technologies, formation real-time perception,
The multidimensional isomery complication system that dynamic control is merged with information service.With computing technique, the communication technology and intelligent control technology
Develop rapidly, information physical coupled system is once proposing just to cause the extensive attention of academia and industrial circle and keep quick hair
Exhibition.
In recent years, with continuing to develop that intelligent grid is built, power network number of sensors, information network scale and decision-making list
First quantity is all increased sharply, and the automaticity of power system is greatly improved.The power of information system carries for operation of power networks
Technical guarantee has been supplied, also make it that demand response technology participates in system frequency regulation.Therefore, how power information is considered
Physics interaction dynamic characteristic, the effective information for excavating mass data in power information physical coupling system, study a kind of consideration demand
The power information physical coupling modeling method of response message, as urgently open question.But, grinding for this respect at present
Study carefully, yet there are no the proposition of ripe scheme.
The content of the invention
The present invention seeks to：Demand response information is not considered when power information physical coupling is modeled for prior art
Deficiency, proposes a kind of power information physical coupling modeling method for considering demand response information, is information physical coupled system frequency
Rate stability contorting provides new approaches.
Specifically, the present invention is realized using following technical scheme：Demand response information is included into power system thing
Manage in model, set up power information physical coupling model and be shown below：
ΔPT(s)-ΔPL(s)+ΔPDR(s)=2Hs Δs f (s)+D Δ f (s)
In the formula, Δ PT(s) fired power generating unit power increment is represented；ΔPL(s) load power increment is represented；ΔPDR(s) table
Show demand response resource power increment；H, D represent system inertia time constant and damped coefficient respectively；Δ f (s) represents system frequency
Rate increment；S represents that Laplace's operation is accorded with；
The changed power for participating in the control of power information physical coupling system frequency in view of demand response resource is instantaneous complete
Into, therefore by Δ PDR(s) transmission function form of a ratio control plus time delay process is characterized as, specific formula is as follows：
In the formula, KPRepresent the regulation relation of demand response power and frequency variation；Represent time delay process；TdTable
Show demand response resource response delay time constant.
Above-mentioned technical proposal is further characterized by, and demand is rung using padé approximation (Pad é approximation)
Answer time delay processLinearized, as described in following formula：
Wherein, G (s) is representedTransmission function after link linearisation.
Beneficial effects of the present invention are as follows：The present invention adds demand response feedback control in legacy frequencies response model
Ring, the feedback loop considers that demand response participates in the characteristics such as ability and the information system communication delay of system frequency modulation, sets up electric power
Information physical coupling model, realizes being closely connected for information side and physical side in power information physical coupling system, carries significantly
The high frequency stability of power system.
Brief description of the drawings
Fig. 1 is the power information physical coupling model framework chart for considering demand response information of the invention；
Fig. 2 is the simulation model figure of embodiment.
Fig. 3 is the simulation result figure of embodiment.
Embodiment
With reference to embodiment and the present invention is described in further detail referring to the drawings.
Embodiment 1：
One embodiment of the present of invention, describes a kind of power information physical coupling modeling side for considering demand response information
Method, specifically, the main process of the modeling method are to include demand response information in power system physical model, are set up
Power information physical coupling model is shown below.
ΔPT(s)-ΔPL(s)+ΔPDR(s)=2Hs Δs ω (s)+D Δ ω (s)
Wherein, Δ PT(s) fired power generating unit power increment is represented；ΔPL(s) load power increment is represented；ΔPDR(s) represent
Demand response resource power increment；H, D represent system inertia time constant and damped coefficient respectively；Δ ω (s) represents system frequency
Rate increment；S represents that Laplace's operation is accorded with.
The changed power for participating in the control of power information physical coupling system frequency in view of demand response resource is instantaneous complete
Into, therefore by Δ PDR(s) transmission function form of a ratio control plus time delay process is characterized as, specific formula is as follows.
Wherein, KPRepresent the regulation relation of demand response power and frequency variation；Represent time delay process；TdRepresent
Demand response resource response delay time constant.
Using padé approximation (Pad é approximation) to demand response time delay processLinearized, process
It is as follows.
Wherein：
It is a p rank multinomial,
It is a q rank multinomial,
P, q are polynomial order, typically take 5~10,5 are taken in the present embodiment；K is nonnegative integer.
Using five rank abbreviations, obtain
Wherein, G (s) is representedTransmission function after link linearisation.
By above modeling process, the present embodiment ultimately forms complete model block diagram as shown in Figure 1.As shown in figure 1,
ΔPL(s) load power increment is represented；KPRepresent the regulation relation of demand response power and frequency variation；Represent delay
Link；TdRepresent demand response resource response delay time constant；H, D represent system inertia time constant and damping system respectively
Number；FHPRepresent reheat factor；TRHRepresent reheating generating set time constant；TGRepresent speed regulator time constant；TchRepresent steamer
Machine time constant；Δ ω (s) represents system frequency increment；R represents primary frequency modulation difference coefficient；S represents that Laplace's operation is accorded with.
The practice of such scheme given below.Assuming that systematic parameter is as shown in the table.
The electric system simulation parameter of table 1
| TG | Tch | TRH | R | FHP | 2H | D | Td | △PL(s) | Kp |
| 0.2s | 0.4s | 7s | 3.0Hz/p.u. | 0.3 | 0.1667pu.s | 0.015p.u./Hz | 0.1s | 0.01p.u. | 0.2 |
Wherein, TGRepresent speed regulator time constant；TchRepresent steam turbine time constant；TRHRepresent reheating embrittlement inertia time
Constant；R represents primary frequency modulation difference coefficient；FHPRepresent reheat factor；H, D represent system inertia time constant and damping system respectively
Number；TdRepresent demand response resource response delay time constant；ΔPL(s) load power increment is represented；KPRepresent demand response work(
The regulation relation of rate and frequency variation.
In the complete model block diagram that parameter in upper table is substituted into Fig. 1, and build in Simulink/Matlab emulation mould
Type, simulation model structure is shown in Fig. 2, and exporting a frequency variation signal from " frequency variation " module represents that mains frequency falls,
" ratio and delay " module, the curve that output frequency recovers after the FM module and addition demand response of power network itself.
Simulation result is shown in Fig. 3.From simulation result, it is considered to which demand response participates in frequency primary frequency modulation effect ratio and do not considered
To get well, not only frequency is fallen minimum point and increased, and frequency finally recovers stationary value also than not considering the stabilization of demand response
Value is high；Consider that communication delay participates in primary frequency modulation effect to demand response, it can be seen that in the case of having communication delay, frequency is most
Low spot can be lower when communication delay than not accounting for, but final frequency recovery effects are similar.
Although the present invention is disclosed as above with preferred embodiment, embodiment is not for limiting the present invention's.Not
In the spirit and scope for departing from the present invention, any equivalence changes done or retouching also belong to the protection domain of the present invention.Cause
The content that this protection scope of the present invention should be defined using claims hereof is standard.
Claims (2)
1. a kind of power information physical coupling modeling method for considering demand response information, it is characterised in that believe demand response
Breath is included in power system physical model, is set up power information physical coupling model and is shown below：
ΔPT(s)-ΔPL(s)+ΔPDR(s)=2Hs Δs f (s)+D Δ f (s)
In the formula, Δ PT(s) fired power generating unit power increment is represented；ΔPL(s) load power increment is represented；ΔPDR(s) demand is represented
Resource response power increment；H, D represent system inertia time constant and damped coefficient respectively；Δ f (s) represents that system frequency increases
Amount；S represents that Laplace's operation is accorded with；
Wherein, Δ PDR(s) transmission function form of a ratio control plus time delay process is characterized as, specific formula is as follows：
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In the formula, KPRepresent the regulation relation of demand response power and frequency variation；Represent time delay process；TdRepresent to need
Resource response is asked to respond delay time constant.
2. the power information physical coupling modeling method according to claim 1 for considering demand response information, its feature exists
In using padé approximation to demand response time delay processLinearized, as described in following formula：
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Wherein, G (s) is representedTransmission function after link linearisation.
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| CN108021029A (en) * | 2017-11-17 | 2018-05-11 | 北京航空航天大学 | A kind of intelligent domestic electricity demanding response platform |
| CN108489015A (en) * | 2018-03-05 | 2018-09-04 | 苏州科技大学 | Air-conditioning system temperature control method based on POLE PLACEMENT USING and padé approximation |
| CN109345115A (en) * | 2018-09-30 | 2019-02-15 | 国网浙江省电力有限公司 | A kind of power information physics system evolution driving metric evaluation method |
| CN109755937A (en) * | 2019-01-18 | 2019-05-14 | 内蒙古电力(集团)有限责任公司电力调度控制分公司 | A kind of regional power grid inertia calculation method and apparatus based on measurement |
| CN111368443A (en) * | 2020-03-06 | 2020-07-03 | 北京旷视机器人技术有限公司 | Equipment simulation method and device and electronic equipment |
| CN112531791A (en) * | 2020-11-27 | 2021-03-19 | 国网宁夏电力有限公司电力科学研究院 | Method and device for controlling resource coordination frequency of demand side |
| CN112818545A (en) * | 2021-02-03 | 2021-05-18 | 东北电力大学 | Power information physical joint simulation platform based on OPC |
| WO2022227104A1 (en) * | 2021-04-25 | 2022-11-03 | 上海交通大学 | Active distribution network information physical fusion control method for hybrid system model |
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| CN107947169A (en) * | 2017-12-07 | 2018-04-20 | 清华大学 | A kind of information flow modeling method of energy management system |
| CN107947169B (en) * | 2017-12-07 | 2020-01-10 | 清华大学 | Information flow modeling method for power grid energy management system |
| CN108489015A (en) * | 2018-03-05 | 2018-09-04 | 苏州科技大学 | Air-conditioning system temperature control method based on POLE PLACEMENT USING and padé approximation |
| CN108489015B (en) * | 2018-03-05 | 2020-07-14 | 苏州科技大学 | Air conditioning system temperature control method based on pole allocation and Pade approximation |
| CN109345115A (en) * | 2018-09-30 | 2019-02-15 | 国网浙江省电力有限公司 | A kind of power information physics system evolution driving metric evaluation method |
| CN109755937A (en) * | 2019-01-18 | 2019-05-14 | 内蒙古电力(集团)有限责任公司电力调度控制分公司 | A kind of regional power grid inertia calculation method and apparatus based on measurement |
| CN111368443A (en) * | 2020-03-06 | 2020-07-03 | 北京旷视机器人技术有限公司 | Equipment simulation method and device and electronic equipment |
| CN112531791A (en) * | 2020-11-27 | 2021-03-19 | 国网宁夏电力有限公司电力科学研究院 | Method and device for controlling resource coordination frequency of demand side |
| CN112531791B (en) * | 2020-11-27 | 2023-03-24 | 国网宁夏电力有限公司电力科学研究院 | Method and device for controlling resource coordination frequency of demand side |
| CN112818545A (en) * | 2021-02-03 | 2021-05-18 | 东北电力大学 | Power information physical joint simulation platform based on OPC |
| WO2022227104A1 (en) * | 2021-04-25 | 2022-11-03 | 上海交通大学 | Active distribution network information physical fusion control method for hybrid system model |
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