CN106780114A - Power network drop after the control of lotus net source coordination damages effect Comprehensive quantitative evaluation method - Google Patents

Abstract

Effect Comprehensive quantitative evaluation method is damaged the invention discloses the power network drop after the control of lotus net source coordination, after lotus net source coordination control reducing loss measure, evaluation index calculating is carried out to its implementation result and drop is damaged effect assessment.From grid side, mains side, three angles of high energy load side, each main body profit and contribution being considered comprehensively, comprehensively, proposing multiple influent factors, calculate multiple quantizating index, the evaluation of effect is damaged in realization to drop.During specific implementation, lotus net source coordination control reducing loss measure is chosen, further according to history and measured value, be calculated the quantized values of each index, effect damaged to system drop on this basis and is made an appraisal, and provide corresponding drop and damage effect promoting suggestion.Control reducing loss measure implementation result to evaluate by lotus net source coordination, the true effect of lotus net source coordination control measure reduction network loss can be fully demonstrated.

Description

Coordinate the power network drop after control and damage effect Comprehensive quantitative evaluation method in lotus-net-source

Technical field

The present invention relates to power network efficiency evaluation technical field, in particular it relates to the power network drop after control is coordinated in lotus-net-source Damage effect Comprehensive quantitative evaluation method.

Background technology

Hexi Corridor power network while large-scale wind power generates electricity by way of merging two or more grid systems, also send out by the high energy load such as electrolytic aluminium, carborundum Exhibition is rapid.On the one hand load side high energy enterprise's Load Regulation characteristic and the regularity of distribution are considered, can by modes such as on-site eliminations Realize that drop is damaged；On the other hand the regulating power of a large amount of reactive-load compensation equipments of grid side is considered further that, and coordinates mains side to adjust, so that The coordination control interactive two-by-two between lotus-net, lotus-source, net-source is realized, and interaction coordinates control to drop between lotus-net-source Low the whole network network loss.

When coordinating to control reducing loss measure implementation result to evaluate to lotus-net-source, the evaluation index method taken must have Standby specific aim, science, accuracy, need to fully demonstrate the effect that control measure reduction network loss is coordinated in lotus-net-source.

The content of the invention

It is an object of the present invention to regarding to the issue above, propose that the power network drop damage effect after control is coordinated in lotus-net-source comprehensive Method for quantitatively evaluating is closed, is to build both at home and abroad to realize science, evaluate the effect that control reduction network loss is coordinated in lotus-net-source exactly Vertical same type energy-saving index system provides referential foundation.

To achieve the above object, the technical solution adopted by the present invention is：Coordinate the power network drop after control and damage effect in lotus-net-source Fruit Comprehensive quantitative evaluation method, mainly includes：

Step 1：Control measure, record are coordinated with needs, the appropriate lotus-net of selection-source is evaluated according to power network actual demand Measure and the time of implementation；

Step 2：According to system history data and measured value, each index value in index system is obtained；

Step 3：Index system numerical value in index system, damages effect and makes an appraisal, and provide corresponding to system drop Efficiency lifting suggestion；

Step 4：According to evaluation result and suggestion, show that lotus-net-source is coordinated the drop after control and damages effect Comprehensive quantitative evaluation Report.

Further, in step 2, the index system includes grid side index system, mains side index system and load high Can load side index system.

Further, the achievement data in the grid side index system includes, electric network synthetic loss, reactive-load compensation into Sheet, network load situation, power network three-phase imbalance degree, the total harmonic distortion situation data of power network, stand-by power supply and economic drop are damaged Benefit.

Further, the electric network synthetic is lost and includes,

Drop damage amount E_Δ, drop damage amount E in the statistics phase_ΔSize, with accumulated time effect, specific formula for calculation is as follows：

E_Δ=E_B-E_R+E_A (1)

Wherein E_ΔIt is statistics phase drop damage amount, E_BIt is statistics phase network loss calibration reference amount, E_RFor the statistics phase implements lotus-net-source section Network loss amount after energy measure, E_AIt is adjustment amount, unit unitizes, and is MWh；

Transmission line loss rate A₁₁, the percentage of the electric energy lost on power network line the line is busy road head end output electric energy is referred to as Transmission line loss rate, abbreviation line loss per unit, the height of line loss per unit is power planning design level, production technology level and management water Flat concentrated expression；

If the power attenuation of circuit i is Δ P_i, it is P that substation line outlet trend is active_i, then the line loss per unit of this circuit For：

Electric network synthetic line loss per unit A₁₂, index " electric network synthetic line loss per unit " is mainly from power line loss overall condition angle analysis electricity Net wire loss level, by the average line loss per unit of Load flow calculation power network, the main power attenuation for considering circuit and transformer, below pin Calculating to electric network synthetic line loss per unit is specifically described, if trunk number of lines is n in power network, transmission line loss rate is A₁₁, Then have：

Further, the reactive-load compensation cost, specially increases reactive-load compensation equipment cost C (Δ Q newly_Ci), it calculates public Formula is as follows：

C(ΔQ_Ci)=(α+γ) K_CΔQ_Ci (4)

In formula：α, γ --- respectively depreciation maintenance rate and rate of return on investment；K_C--- unit capacity compensates equipment investment, Unit：Ten thousand yuan/MVar；ΔQ_Ci--- newly-increased compensation place capacity, unit：MVar；C --- newly-increased reactive-load compensation equipment cost, Unit：Wan Yuan；

The network load situation includes,

Power network peak-valley ratio A₃₁, the peak-valley difference of whole assessment area network load and the ratio of maximum load are referred to as power network peak Paddy rate, is the electric power for dispatching power system and the important evidence for carrying out Power System Planning, defines power network peak-valley ratio and is：

Wherein, P_maxIt is power network Daily treatment cost, P_minIt is power network day minimum load；

Rate of load condensate A₃₂, rate of load condensate can reflect load balancing degree, and rate of load condensate is higher, and overall synthetic loss is lower, definition Rate of load condensate A₃₂For：

Wherein, P_averIt is average load capacity, P_zgIt is maximum load capacity；

The power network non-equilibrium among three phase voltages A₄₁, refer to the degree of three-phase imbalance in three-phase electrical power system.With voltage, electricity Stream negative phase-sequence fundametal compoment or zero sequence fundametal compoment are represented with the root-mean-square valve percentage of positive sequence fundametal compoment, if U₂And U₁Respectively The negative phase-sequence and positive-sequence component root-mean-square valve of three-phase voltage, then non-equilibrium among three phase voltages can be expressed as follows：

The total harmonic distortion situation of voltage is specifically, distorted waveform voltage root-mean-square valve can be represented by the formula：

As can be seen here, the root-mean-square valve of non-sinusoidal periodicity voltage, equal to its each harmonic voltage root-mean-square valve square The root-mean-square valve of sum；

Therefore voltage total harmonic distortion factor A₅₁For：

The stand-by power supply can promote dissolving for new energy specifically, control is coordinated in lotus-net-source, while electricity can be alleviated Net peak regulation pressure, required spare capacity reduces, and the computing formula of the capacity accounting variable quantity of stand-by power supply needed for power network is as follows：

In formula：P_backup_Δ--- stand-by power supply reduces capacity accounting, unit MW；P_backup₁--- implement drop damage and arrange Stand-by power supply capacity before applying, unit MW；P_backup₂--- implement the stand-by power supply capacity after reducing loss measure, unit MW； Total_backup --- total spare capacity, unit MW.

It is following two specific targets that the urgent drop is damaged benefit and specifically expanded：

Power saving rate A₇₁

The electricity that power network can be saved after index reflection drop damage, embodies economic benefit；

Wherein, E_jdRepresent amount of electricity saving, E_ydRepresent former electricity；

Cost savings income A₇₂

The qualitative index is used for reflecting that drop damages the influence for bringing the use of circuit and equipment, so as to be converted into what can be saved Cost-benefit, also embodies economic benefit.

Further, the achievement data in the mains side index system includes, new energy low-carbon (LC) benefit, utilization of new energy resources Situation, new energy component indicate and station service situation, the new energy low-carbon (LC) benefit specifically,

Electricity volume is more, and low-carbon (LC) benefit is more notable, therefore, power network has become influence newly to dissolving for its generated energy The principal element of the grid-connected low-carbon (LC) benefit of the energy, with the total CO of system₂Discharge capacityIt is used as evaluation index：

In formula：It is the carbon emission factor, the carbon emission factor of domestic coal unit is 0.41416kg/ (kWh)； It is the total CO of system₂Discharge capacity；T is simulation time length；P₁ ^tIt is the t total power loads of period system；For on t period new energy Net power consumption；

The utilization of new energy resources situation is specifically, the effective of new energy utilizes A₉₁, the qualitative index reflects lotus-net-source After coordinating control drop damage, the raising of new energy digestion capability.For example for wind-power electricity generation, calculation expression is：

Wherein, the right maximum generating watt of wind-power electricity generation=wind-power electricity generation actual power generation+abandon wind-powered electricity generation amount, abandoning wind-powered electricity generation amount can Wind-powered electricity generation amount statistical method is abandoned by the wind power plant such as template processing machine method and power curve method to obtain；

New energy and renewable energy power generation TCPI REPPI_i

Define new energy and renewable energy power generation TCPI is：

REPPI in formula_iIt is the new energy and renewable energy power generation TCPI of national i；c_ijIt is i-th national jth kind The installed capacity of energy technology；r_ijIt is i-th available resources total amount of the national jth kind energy；R_0jIt is the world's new energy of jth kind Source and the available resources total amount of regenerative resource；w_jIt is jth kind new energy and the weight of renewable energy power generation technology；

The new energy component index, including,

Assembly reliability criticality importance CI

The influence degree of the stoppage in transit probability change to Reliability Index of component j is represented using CI, its meaning is group Part j to system unreliability can contribution, computing formula is：

The experiment function of F in formula --- reliability index, different index units are different；E (F) --- the phase of experiment function F Prestige value, i.e., different reliability indexs；u_j--- j-th outage rate (or forced outage rate FOR) of constituent system components； CI_Fj--- criticality importance of j-th system component to system index.

Comprehensive station service power consumption rate A₁₀₂

Comprehensive station service power consumption rate refers to the difference and the ratio of full factory's generated energy of full factory's generated energy and electricity volume, i.e.,

In formula, A₁₀₂It is comprehensive station service power consumption rate；W_fIt is the outer purchase of electricity of full factory, kWh；W_gkIt is the critical point electricity of full factory, kWh； W_wgIt is generated energy total amount, kWh in the calculating phase；

The station service situation, including fired power generating unit net coal consumption rate b_sn

b_snAs the most basic energy consumption characteristics index of fired power generating unit, reflect the average operating efficiency of the whole network fired power generating unit, Reflect thermal power generation carbon emission level indirectly, computing formula is as follows：

η in formula_b、η_i、η_m、η_g、η_pWith ∑ ξ_iRespectively boiler efficiency, thermal efficiency of cycle, mechanical efficiency, generator efficiency, Pipeline efficiency and each subsidiary engine power consumption rate.

Plant thermal efficiency η_c

Use the plant thermal efficiency that back balance method is calculated for

η_c=η_bη_pη_tη_riη_mη_g+αη_bη_p(1-η_tη_riη_mη_g) (18)

In formula：η_cIt is thermal power plant plant thermal efficiency；η_bIt is boiler thermal output；η_pIt is piping thermal efficiency；η_tIt is steam turbine The Ideal Cycle thermal efficiency；η_riIt is the internal efficiency ratio of steam turbine；η_mIt is the mechanical efficiency of steam turbine；η_gIt is generator efficiency；α It is heat supply ratio.

Further, the achievement data in the high energy load side index system includes that high energy load participates in regulation volume Outer loss, high energy participates in the start and stop cost depletions F that lotus net source coordination causes_s

High energy load participates in lotus-net-source interaction control strategy, to adapt to peak regulation demand, need to carry out start and stop or supercharging Load operation, defines F_sRepresent that high energy participates in the start and stop cost depletions (unit) that lotus net source coordination causes：

F_s=J_q×i (19)

Unit Commitment cost depletions refer to that unit adapts to peak regulation change, the cost of extra consumption when exiting or putting into；J_qFor The cost (unit) of single start and stop, i is the start-stop time that unit participates in peak regulation, is determined herein according to Unit Commitment group number,

High energy enterprise participates in the loss of outage cost F that lotus net source coordination is caused_D

Define F_DRepresent that high energy enterprise participates in the loss of outage cost (unit) that lotus net source coordination is caused：

F_D=F_Loss×ΔP_H

lgF_Loss=1.26+0.47lg (t/60) (20)

Wherein F_LossIt is long-time loss of outage (unit/kW), Δ P_HThe capacity (kW) of peak regulation is participated in for high energy load, t is High energy load participates in the short of electricity time that peak regulation causes, and unit is h.

High energy participates in the increased electrical equipment cost depletions F of peak regulation_M

Define F_MRepresent that high energy participates in the increased electrical equipment cost depletions (unit) of peak regulation：

Wherein, W_iFor equipment i participates in the power consumption under peak regulation, η in high energy_iFor now corresponding device efficiency, η_opt,i It is the maximum efficiency of equipment i, J_dIt is total rate of electricity (unit/kWh).

Lotus-the net of various embodiments of the present invention-source is coordinated the power network drop after control and damages effect Comprehensive quantitative evaluation method, due to Mainly include：From grid side, mains side, three angles of high energy load side, comprehensively, each main body profit is considered comprehensively With contribution, multiple influent factors are proposed, calculate multiple quantizating index, realize damaging drop the evaluation of effect.During specific implementation, choosing Take lotus-net-source and coordinate control reducing loss measure, further according to history and measured value, be calculated the quantized values of each index, herein On the basis of effect damaged to system drop make an appraisal, and provide corresponding drop and damage effect promoting suggestion；So as to science, evaluate exactly Lotus-net-source coordinates control reduces the effect of network loss, for set up both at home and abroad same type energy-saving index system provide it is referential according to According to.

Other features and advantages of the present invention will be illustrated in the following description, also, the partly change from specification Obtain it is clear that or being understood by implementing the present invention.

Below by drawings and Examples, technical scheme is described in further detail.

Brief description of the drawings

Accompanying drawing is used for providing a further understanding of the present invention, and constitutes a part for specification, with reality of the invention Applying example is used to explain the present invention together, is not construed as limiting the invention.In the accompanying drawings：

Fig. 1 is that power network drop damages effect comprehensive quantification efficiency evaluation index system figure after control is coordinated in lotus-net-source；

Fig. 2 is that power network drop damages effect comprehensive quantification efficiency evaluation flow chart after control is coordinated in lotus-net-source；

Specific embodiment

The preferred embodiments of the present invention are illustrated below in conjunction with accompanying drawing, it will be appreciated that preferred reality described herein Apply example to be merely to illustrate and explain the present invention, be not intended to limit the present invention.

Lotus-net-source is coordinated the power network drop after control and damages effect Comprehensive quantitative evaluation method, including：Coordinate control in lotus-net-source After reducing loss measure processed, evaluation index calculating is carried out to its implementation result and drop damages effect assessment.From grid side, mains side, load high Energy three angles of load side are set out, and each main body profit and contribution are considered comprehensively, comprehensively, propose multiple influent factors, calculating Go out multiple quantizating index, realize damaging drop the evaluation of effect.During specific implementation, choose lotus-net-source and coordinate control reducing loss measure, Further according to history and measured value, the quantized values of each index are calculated, system drop damage effect are made commenting on this basis Valency, and provide corresponding drop damage effect promoting suggestion.

The present invention is evaluated by coordinating control reducing loss measure implementation result to lotus-net-source, can fully demonstrate lotus-net- Coordinate the true effect of control measure reduction network loss in source.With reference to Fig. 1,

It is as follows that evaluation index calculates content：

1. electric network synthetic loss

The essential elements of evaluation is widenable to three below specific targets：

(1) drop damage amount E_Δ

Drop damage amount E in the statistics phase_ΔSize, with accumulated time effect, specific formula for calculation is as follows：

E_Δ=E_B-E_R+E_A (1)

Wherein E_ΔIt is statistics phase drop damage amount, E_BIt is statistics phase network loss calibration reference amount, E_RFor the statistics phase implements lotus-net-source section Network loss amount after energy measure, E_AIt is adjustment amount, unit unitizes, and is MWh.

(2) transmission line loss rate A₁₁

The electric energy lost on power network line the line is busy road head end exports the percentage referred to as transmission line loss rate of electric energy, letter Claim line loss per unit.The height of line loss per unit is the concentrated expression of power planning design level, production technology level and managerial skills.

If the power attenuation of circuit i is Δ P_i, it is P that substation line outlet trend is active_i, then the line loss per unit of this circuit For：

(3) electric network synthetic line loss per unit A₁₂

Index " electric network synthetic line loss per unit " is main from power line loss overall condition angle analysis grid line loss level.By tide The average line loss per unit of stream calculation power network, the main power attenuation for considering circuit and transformer, below for electric network synthetic line loss per unit Calculating be specifically described, if in power network trunk number of lines be n, transmission line loss rate be A₁₁, then have：

2. reactive-load compensation cost

Specific targets under the essential elements of evaluation are newly-increased reactive-load compensation equipment cost C (Δ Q_Ci), its computing formula is as follows：

C(ΔQ_Ci)=(α+γ) K_CΔQ_Ci (4)

In formula：α, γ --- respectively depreciation maintenance rate and rate of return on investment；K_C--- unit capacity compensates equipment investment, Unit：Ten thousand yuan/MVar；ΔQ_Ci--- newly-increased compensation place capacity, unit：MVar；C --- newly-increased reactive-load compensation equipment cost, Unit：Wan Yuan

3. network load situation

(1) power network peak-valley ratio A₃₁

The peak-valley difference of whole assessment area network load and the ratio of maximum load are referred to as power network peak-valley ratio, are scheduling electricity The electric power of Force system and the important evidence for carrying out Power System Planning.Defining power network peak-valley ratio is：

Wherein, P_maxIt is power network Daily treatment cost, P_minIt is power network day minimum load.

(2) rate of load condensate A₃₂

Rate of load condensate can reflect load balancing degree, and rate of load condensate is higher, and overall synthetic loss is lower.Define rate of load condensate A₃₂ For：

Wherein, P_averIt is average load capacity, P_zgIt is maximum load capacity.

4. power network three-phase imbalance degree

Non-equilibrium among three phase voltages A₄₁Refer to the degree of three-phase imbalance in three-phase electrical power system.With voltage, electric current negative phase-sequence base Wave component or zero sequence fundametal compoment are represented with the root-mean-square valve percentage of positive sequence fundametal compoment.If U₂And U₁Respectively three-phase voltage Negative phase-sequence and positive-sequence component root-mean-square valve, then non-equilibrium among three phase voltages can be expressed as follows：

5. the total harmonic distortion situation of voltage

Distorted waveform voltage root-mean-square valve can be represented by the formula：

As can be seen here, the root-mean-square valve of non-sinusoidal periodicity voltage, equal to its each harmonic voltage root-mean-square valve square The root-mean-square valve of sum.

Therefore voltage total harmonic distortion factor A₅₁For：

6. stand-by power supply

Lotus-net-source is coordinated control and can promote dissolving for new energy, while peak load regulation network pressure can be alleviated, it is required standby Capacity reduces.The computing formula of the capacity accounting variable quantity of stand-by power supply needed for power network is as follows：

In formula：P_backup_Δ--- stand-by power supply reduces capacity accounting, unit MW；P_backup₁--- implement drop damage and arrange Stand-by power supply capacity before applying, unit MW；P_backup₂--- implement the stand-by power supply capacity after reducing loss measure, unit MW； Total_backup --- total spare capacity, unit MW.

7. economic drop damages benefit

The essential elements of evaluation is widenable to following two specific targets：

(1) power saving rate A₇₁

The electricity that power network can be saved after index reflection drop damage, embodies economic benefit.

Wherein, E_jdRepresent amount of electricity saving, E_ydRepresent former electricity.

(2) cost savings income A₇₂

The qualitative index is used for reflecting that drop damages the influence for bringing the use of circuit and equipment, so as to be converted into what can be saved Cost-benefit, also embodies economic benefit.

8. new energy low-carbon (LC) benefit

In general, electricity volume is more, and low-carbon (LC) benefit is more notable.Therefore, power network dissolving to its generated energy Principal element as influence new-energy grid-connected low-carbon (LC) benefit.The total CO of available system₂Discharge capacityIt is used as evaluation index：

In formula：It is the carbon emission factor, the carbon emission factor of domestic coal unit is 0.41416kg/ (kWh)； It is the total CO of system₂Discharge capacity；T is simulation time length；P₁ ^tIt is the t total power loads of period system；For on t period new energy Net power consumption.

9. utilization of new energy resources situation

(1) the effective of new energy utilizes A₉₁

After the qualitative index reflects lotus-net-source coordination control drop damage, the raising of new energy digestion capability.For example for Wind-power electricity generation, calculation expression is：

Wherein, the right maximum generating watt of wind-power electricity generation=wind-power electricity generation actual power generation+abandon wind-powered electricity generation amount, abandoning wind-powered electricity generation amount can Wind-powered electricity generation amount statistical method is abandoned by the wind power plant such as template processing machine method and power curve method to obtain.

(2) new energy and renewable energy power generation TCPI REPPI_i

Define new energy and renewable energy power generation TCPI (New and Renewable Energy Electric Power Generation Performance Index, REPPI) be：

REPPI in formula_iIt is the new energy and renewable energy power generation TCPI of national i；c_ijIt is i-th national jth kind The installed capacity of energy technology；r_ijIt is i-th available resources total amount of the national jth kind energy；R_0jIt is the world's new energy of jth kind Source and the available resources total amount of regenerative resource；w_jIt is jth kind new energy and the weight of renewable energy power generation technology.

10. new energy component index

(1) assembly reliability criticality importance CI

The influence degree of the stoppage in transit probability change to Reliability Index of component j is represented using CI, its meaning is group Part j to system unreliability can contribution, computing formula is：

The experiment function of F in formula --- reliability index, different index units are different；E (F) --- the phase of experiment function F Prestige value, i.e., different reliability indexs；u_j--- j-th outage rate (or forced outage rate FOR) of constituent system components； CI_Fj--- criticality importance of j-th system component to system index.

(2) comprehensive station service power consumption rate A₁₀₂

Comprehensive station service power consumption rate refers to the difference and the ratio of full factory's generated energy of full factory's generated energy and electricity volume, i.e.,

In formula, A₁₀₂It is comprehensive station service power consumption rate；W_fIt is the outer purchase of electricity of full factory, kWh；W_gkIt is the critical point electricity of full factory, kWh； W_wgIt is generated energy total amount, kWh in the calculating phase.

11. station service situations

(1) fired power generating unit net coal consumption rate b_sn

b_snAs the most basic energy consumption characteristics index of fired power generating unit, reflect the average operating efficiency of the whole network fired power generating unit, Reflect thermal power generation carbon emission level indirectly, computing formula is as follows：

η in formula_b、η_i、η_m、η_g、η_pWith ∑ ξ_iRespectively boiler efficiency, thermal efficiency of cycle, mechanical efficiency, generator efficiency, Pipeline efficiency and each subsidiary engine power consumption rate.

(2) plant thermal efficiency η_c

Use the plant thermal efficiency that back balance method is calculated for

η_c=η_bη_pη_tη_riη_mη_g+αη_bη_p(1-η_tη_riη_mη_g) (18)

In formula：η_cIt is thermal power plant plant thermal efficiency；η_bIt is boiler thermal output；η_pIt is piping thermal efficiency；η_tIt is steam turbine The Ideal Cycle thermal efficiency；η_riIt is the internal efficiency ratio of steam turbine；η_mIt is the mechanical efficiency of steam turbine；η_gIt is generator efficiency；α For is compared in heat supply

12. high energy loads participate in regulation excess loss

(1) high energy participates in the start and stop cost depletions F that lotus net source coordination causes_s

High energy load participates in lotus-net-source interaction control strategy, to adapt to peak regulation demand, need to carry out start and stop or supercharging Load operation, defines F_sRepresent that high energy participates in the start and stop cost depletions (unit) that lotus net source coordination causes：

F_s=J_q×i (19)

Unit Commitment cost depletions refer to that unit adapts to peak regulation change, the cost of extra consumption when exiting or putting into.J_qFor The cost (unit) of single start and stop, i is the start-stop time that unit participates in peak regulation, is determined herein according to Unit Commitment group number.

(2) high energy enterprise participates in the loss of outage cost F that lotus net source coordination is caused_D

Define F_DRepresent that high energy enterprise participates in the loss of outage cost (unit) that lotus net source coordination is caused：

F_D=F_Loss×ΔP_H

lgF_Loss=1.26+0.47lg (t/60) (20)

Wherein F_LossIt is long-time loss of outage (unit/kW), Δ P_HThe capacity (kW) of peak regulation is participated in for high energy load, t is High energy load participates in the short of electricity time that peak regulation causes, and unit is h.

(3) high energy participates in the increased electrical equipment cost depletions FM of peak regulation

Define F_MRepresent that high energy participates in the increased electrical equipment cost depletions (unit) of peak regulation：

Wherein, W_iFor equipment i participates in the power consumption under peak regulation, η in high energy_iFor now corresponding device efficiency, η_opt,i It is the maximum efficiency of equipment i, J_dIt is total rate of electricity (unit/kWh).

Above-mentioned essential elements of evaluation collectively forms power network drop after control is coordinated in lotus-net-source and damages effect comprehensive quantification efficiency with index Assessment indicator system.

According to system history data and measured data, the concrete numerical value of index is just can obtain, be applied to lotus-net-source and coordinate Power network drop after control damages effect Comprehensive quantitative evaluation.

In fig. 2, Fig. 2 is that power network drop damages effect Comprehensive quantitative evaluation method flow diagram after control is coordinated in lotus-net-source.

Step 1：Control measure, record are coordinated with needs, the appropriate lotus-net of selection-source is evaluated according to power network actual demand Measure and the time of implementation.

Step 2：According to system history data and measured value, each index value in index system shown in Fig. 1 is obtained.

Step 3：Index system numerical value in index system, damages effect and makes an appraisal, and provide corresponding to system drop Efficiency lifting suggestion.

Step 4：According to evaluation result and suggestion, establishment《Coordinate the power network drop damage effect after control and comprehensively measure in lotus-net-source Change appraisal report》.

Finally it should be noted that：The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, Although being described in detail to the present invention with reference to the foregoing embodiments, for a person skilled in the art, it still may be used Modified with to the technical scheme described in foregoing embodiments, or equivalent is carried out to which part technical characteristic. All any modification, equivalent substitution and improvements within the spirit and principles in the present invention, made etc., should be included in of the invention Within protection domain.

Claims (7)

1. the power network drop damage effect Comprehensive quantitative evaluation method after control is coordinated in lotus-net-source, it is characterised in that including following step Suddenly：

Step 1：Coordinate control measure, record measure with needs, the appropriate lotus-net of selection-source is evaluated according to power network actual demand With the time of implementation；

Step 2：According to system history data and measured value, each index value in index system is obtained；

Step 3：Index system numerical value in index system, damages effect and makes an appraisal, and provide corresponding energy to system drop Effect lifting suggestion；

Step 4：According to evaluation result and suggestion, show that lotus-net-source is coordinated the drop after control and damages effect Comprehensive quantitative evaluation report Accuse.

2. the power network drop damage effect Comprehensive quantitative evaluation method after control is coordinated in lotus-net according to claim 1-source, its It is characterised by, in step 2, the index system includes grid side index system, mains side index system and high energy load side Index system.

3. the power network drop damage effect Comprehensive quantitative evaluation method after control is coordinated in lotus-net according to claim 1-source, its It is characterised by, the achievement data in the grid side index system includes, electric network synthetic loss, reactive-load compensation cost, power network are born Lotus situation, power network three-phase imbalance degree, the total harmonic distortion situation data of power network, stand-by power supply and economic drop damage benefit.

4. the power network drop damage effect Comprehensive quantitative evaluation method after control is coordinated in lotus-net according to claim 3-source, its It is characterised by, the electric network synthetic loss includes,

Drop damage amount E_Δ, drop damage amount E in the statistics phase_ΔSize, with accumulated time effect, specific formula for calculation is as follows：

E_Δ=E_B-E_R+E_A (1)

Wherein E_ΔIt is statistics phase drop damage amount, E_BIt is statistics phase network loss calibration reference amount, E_RArranged for the statistics phase implements lotus-net-source energy-conservation Network loss amount after applying, E_AIt is adjustment amount, unit unitizes, and is MWh；

Transmission line loss rate A₁₁, the percentage of the electric energy lost on power network line the line is busy road head end output electric energy is referred to as transmission of electricity Line loss rate, abbreviation line loss per unit, the height of line loss per unit is power planning design level, production technology level and managerial skills Concentrated expression；

If the power attenuation of circuit i is Δ P_i, it is P that substation line outlet trend is active_i, then the line loss per unit of this circuit be：

$A_{11}=\frac{{\mathrm{\ΔP}}_i}{P_i}\×100\%---\left(12\right);$

Electric network synthetic line loss per unit A₁₂, index " electric network synthetic line loss per unit " is mainly from power line loss overall condition angle analysis grid line Damage level, by the average line loss per unit of Load flow calculation power network, the main power attenuation for considering circuit and transformer, below for electricity The calculating of the comprehensive line loss per unit of net is specifically described, if trunk number of lines is n in power network, transmission line loss rate is A₁₁, then have：

$A_{12}=\frac{\underset{i=1}{\overset{n}{\Σ}}{A}_{11}}{n}\×100\%---\left(3\right).$

5. the power network drop damage effect Comprehensive quantitative evaluation method after control is coordinated in lotus-net according to claim 3-source, its It is characterised by, the reactive-load compensation cost, specially increases reactive-load compensation equipment cost C (Δ Q newly_Ci), its computing formula is as follows：

C(ΔQ_Ci)=(α+γ) K_CΔQ_Ci (4)

In formula：α, γ --- respectively depreciation maintenance rate and rate of return on investment；K_C--- unit capacity compensates equipment investment, unit： Ten thousand yuan/MVar；ΔQ_Ci--- newly-increased compensation place capacity, unit：MVar；C --- newly-increased reactive-load compensation equipment cost, unit： Wan Yuan；

The network load situation includes,

Power network peak-valley ratio A₃₁, the peak-valley difference of whole assessment area network load and the ratio of maximum load are referred to as power network peak-valley difference Rate, is the electric power for dispatching power system and the important evidence for carrying out Power System Planning, defines power network peak-valley ratio and is：

$A_{31}=\frac{P_{max}-P_{min}}{P_{max}}\×100\%---\left(5\right)$

Wherein, P_maxIt is power network Daily treatment cost, P_minIt is power network day minimum load；

Rate of load condensate A₃₂, rate of load condensate can reflect load balancing degree, and rate of load condensate is higher, and overall synthetic loss is lower, define load Rate A₃₂For：

$A_{32}=\frac{P_{aver}}{P_{zg}}\×100\%---\left(6\right)$

Wherein, P_averIt is average load capacity, P_zgIt is maximum load capacity；

The power network non-equilibrium among three phase voltages A₄₁, refer to the degree of three-phase imbalance in three-phase electrical power system.Born with voltage, electric current Sequence fundametal compoment or zero sequence fundametal compoment are represented with the root-mean-square valve percentage of positive sequence fundametal compoment, if U₂And U₁Respectively three-phase The negative phase-sequence and positive-sequence component root-mean-square valve of voltage, then non-equilibrium among three phase voltages can be expressed as follows：

$A_{41}=\frac{U_2}{U_1}\×100\%---\left(7\right);$

The total harmonic distortion situation of voltage is specifically, distorted waveform voltage root-mean-square valve can be represented by the formula：

$U=\sqrt{U_1^2+U_2^2+U_3^2+L+U_h^2+L}=\sqrt{\underset{h=1}{\overset{N}{\Σ}}{U}_h^2}---\left(8\right);$

As can be seen here, the root-mean-square valve of non-sinusoidal periodicity voltage, equal to the quadratic sum of its each harmonic voltage root-mean-square valve Root-mean-square valve；

Therefore voltage total harmonic distortion factor A₅₁For：

$A_{51}=\sqrt{\underset{h=2}{\overset{N}{\Σ}}{\left(100\frac{U_h}{U_1}\right)}^2}\×100\%---\left(9\right);$

The stand-by power supply can promote dissolving for new energy specifically, control is coordinated in lotus-net-source, while power network tune can be alleviated Peak pressure power, required spare capacity reduces, and the computing formula of the capacity accounting variable quantity of stand-by power supply needed for power network is as follows：

$P\_{\mathrm{backup}}_{\mathrm{\Δ}}\%=\frac{P\_{\mathrm{backup}}_1-P\_{\mathrm{backup}}_2}{Total\_backup}---\left(10\right)$

In formula：P_backup_Δ--- stand-by power supply reduces capacity accounting, unit MW；P_backup₁--- before implementing reducing loss measure Stand-by power supply capacity, unit MW；P_backup₂--- implement the stand-by power supply capacity after reducing loss measure, unit MW；Total_ Backup --- total spare capacity, unit MW.

It is following two specific targets that the urgent drop is damaged benefit and specifically expanded：

Power saving rate A₇₁

The electricity that power network can be saved after index reflection drop damage, embodies economic benefit；

$A_{71}=\frac{E_{jd}}{E_{yd}}\×100\%---\left(11\right)$

Wherein, E_jdRepresent amount of electricity saving, E_ydRepresent former electricity；

Cost savings income A₇₂

The qualitative index is used for reflecting that drop damages the influence for bringing the use of circuit and equipment, so as to be converted into the cost that can be saved Income, also embodies economic benefit.

6. the power network drop damage effect Comprehensive quantitative evaluation method after control is coordinated in lotus-net according to claim 5-source, its It is characterised by, the achievement data in the mains side index system includes, it is new energy low-carbon (LC) benefit, utilization of new energy resources situation, new Power module indicate and station service situation, the new energy low-carbon (LC) benefit specifically,

Electricity volume is more, and low-carbon (LC) benefit is more notable, therefore, power network has become influence new energy to dissolving for its generated energy The principal element of grid-connected low-carbon (LC) benefit, with the total CO of system₂Discharge capacityIt is used as evaluation index：

$E_{{\mathrm{co}}_2}=\underset{t=1}{\overset{T}{\Σ}}{E}_{{\mathrm{Fco}}_2}(P_1^t-P_N^t)---\left(12\right)$

In formula：It is the carbon emission factor, the carbon emission factor of domestic coal unit is 0.41416kg/ (kWh)；To be The total CO of system₂Discharge capacity；T is simulation time length；It is the t total power loads of period system；It is t periods new energy online electricity Electricity；

The utilization of new energy resources situation is specifically, the effective of new energy utilizes A₉₁, the qualitative index reflects lotus-net-source and coordinates After control drop is damaged, the raising of new energy digestion capability.For example for wind-power electricity generation, calculation expression is：

Wherein, the right maximum generating watt of wind-power electricity generation=wind-power electricity generation actual power generation+abandon wind-powered electricity generation amount, abandoning wind-powered electricity generation amount can be by sample The wind power plant such as trigger method and power curve method is abandoned wind-powered electricity generation amount statistical method and is obtained；

New energy and renewable energy power generation TCPI REPPI_i

Define new energy and renewable energy power generation TCPI is：

${\mathrm{REPPI}}_i=ln\underset{j=1}{\overset{n}{\Σ}}{w}_j\frac{c_{ij}}{r_{ij}/R_{0j}}---\left(14\right)$

REPPI in formula_iIt is the new energy and renewable energy power generation TCPI of national i；c_ijIt is the i-th national jth kind energy The installed capacity of technology；r_ijIt is i-th available resources total amount of the national jth kind energy；R_0jFor world's jth kind new energy and The available resources total amount of regenerative resource；w_jIt is jth kind new energy and the weight of renewable energy power generation technology；

The new energy component index, including,

Assembly reliability criticality importance CI

The influence degree of the stoppage in transit probability change to Reliability Index of component j is represented using CI, its meaning is component j pairs System unreliability can contribution, computing formula is：

${\mathrm{CI}}_{Fj}=\frac{\∂E\left(F\right)}{\∂u_j}\frac{u_j}{E\left(F\right)}---\left(15\right)$

The experiment function of F in formula --- reliability index, different index units are different；E (F) --- the desired value of experiment function F, I.e. different reliability indexs；u_j--- j-th outage rate (or forced outage rate FOR) of constituent system components；CI_Fj—— Criticality importance of j-th system component to system index.

Comprehensive station service power consumption rate A₁₀₂

Comprehensive station service power consumption rate refers to the difference and the ratio of full factory's generated energy of full factory's generated energy and electricity volume, i.e.,

$A_{102}=\frac{W_f-W_{gk}+W_{wg}}{W_f}\×100\%---\left(16\right)$

In formula, A₁₀₂It is comprehensive station service power consumption rate；W_fIt is the outer purchase of electricity of full factory, kWh；W_gkIt is the critical point electricity of full factory, kWh；W_wgFor Generated energy total amount, kWh in the calculating phase；

The station service situation, including fired power generating unit net coal consumption rate b_sn

b_snAs the most basic energy consumption characteristics index of fired power generating unit, reflect the average operating efficiency of the whole network fired power generating unit, indirectly Reflection thermal power generation carbon emission level, computing formula is as follows：

$b_{sn}=\frac{1}{{\mathrm{\η}}_b{\mathrm{\η}}_i{\mathrm{\η}}_m{\mathrm{\η}}_g{\mathrm{\η}}_p(1-\Σ{\mathrm{\ξ}}_i)}---\left(17\right)$

η in formula_b、η_i、η_m、η_g、η_pWith ∑ ξ_iRespectively boiler efficiency, thermal efficiency of cycle, mechanical efficiency, generator efficiency, pipeline Efficiency and each subsidiary engine power consumption rate.

Plant thermal efficiency η_c

Use the plant thermal efficiency that back balance method is calculated for

η_c=η_bη_pη_tη_riη_mη_g+αη_bη_p(1-η_tη_riη_mη_g) (18)

In formula：η_cIt is thermal power plant plant thermal efficiency；η_bIt is boiler thermal output；η_pIt is piping thermal efficiency；η_tIt is the reason of steam turbine Think thermal efficiency of cycle；η_riIt is the internal efficiency ratio of steam turbine；η_mIt is the mechanical efficiency of steam turbine；η_gIt is generator efficiency；α is confession Heat ratio.

7. the power network drop damage effect Comprehensive quantitative evaluation method after control is coordinated in lotus-net according to claim 6-source, its It is characterised by, the achievement data in the high energy load side index system includes that high energy load participates in regulation excess loss, High energy participates in the start and stop cost depletions F that lotus net source coordination causes_s

High energy load participates in lotus-net-source interaction control strategy, to adapt to peak regulation demand, need to carry out start and stop or boost load Operation, defines F_sRepresent that high energy participates in the start and stop cost depletions (unit) that lotus net source coordination causes：

F_s=J_q×i (19)

Unit Commitment cost depletions refer to that unit adapts to peak regulation change, the cost of extra consumption when exiting or putting into；J_qFor single is opened The cost (unit) stopped, i is the start-stop time that unit participates in peak regulation, is determined herein according to Unit Commitment group number,

High energy enterprise participates in the loss of outage cost F that lotus net source coordination is caused_D

Define F_DRepresent that high energy enterprise participates in the loss of outage cost (unit) that lotus net source coordination is caused：

F_D=F_Loss×ΔP_H

lgF_Loss=1.26+0.47lg (t/60) (20)

Wherein F_LossIt is long-time loss of outage (unit/kW), Δ P_HThe capacity (kW) of peak regulation is participated in for high energy load, t is carried for high Energy load participates in the short of electricity time that peak regulation causes, and unit is h.

High energy participates in the increased electrical equipment cost depletions F of peak regulation_M

Define F_MRepresent that high energy participates in the increased electrical equipment cost depletions (unit) of peak regulation：

$F_M=\[\ΣW_i-\Σ\frac{W_i}{{\mathrm{\η}}_i}{\mathrm{\η}}_{opt,i}\]\×J_d---\left(21\right)$

Wherein, W_iFor equipment i participates in the power consumption under peak regulation, η in high energy_iFor now corresponding device efficiency, η_opt,iIt is equipment The maximum efficiency of i, J_dIt is total rate of electricity (unit/kWh).