CN113313385B - Power grid additional cost evaluation method considering multi-kind power grid connection risk - Google Patents

Power grid additional cost evaluation method considering multi-kind power grid connection risk Download PDF

Info

Publication number
CN113313385B
CN113313385B CN202110598751.8A CN202110598751A CN113313385B CN 113313385 B CN113313385 B CN 113313385B CN 202110598751 A CN202110598751 A CN 202110598751A CN 113313385 B CN113313385 B CN 113313385B
Authority
CN
China
Prior art keywords
power
unit
cost
thermal power
reactive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202110598751.8A
Other languages
Chinese (zh)
Other versions
CN113313385A (en
Inventor
韩玉辉
马继涛
项颂
陈璐
刘蒙聪
王小宇
李昱材
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Shenyang Institute of Engineering
State Grid Eastern Inner Mongolia Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Shenyang Institute of Engineering
State Grid Eastern Inner Mongolia Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Shenyang Institute of Engineering, State Grid Eastern Inner Mongolia Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN202110598751.8A priority Critical patent/CN113313385B/en
Publication of CN113313385A publication Critical patent/CN113313385A/en
Application granted granted Critical
Publication of CN113313385B publication Critical patent/CN113313385B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q10/00—Administration; Management
    • G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
    • G06Q10/063—Operations research, analysis or management
    • G06Q10/0635—Risk analysis of enterprise or organisation activities
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q30/00—Commerce
    • G06Q30/02—Marketing; Price estimation or determination; Fundraising
    • G06Q30/0201—Market modelling; Market analysis; Collecting market data
    • G06Q30/0206—Price or cost determination based on market factors
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
    • G06Q50/06—Energy or water supply
    • 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
    • H02J3/008—Circuit arrangements for ac mains or ac distribution networks involving trading of energy or energy transmission rights
    • 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
    • H02J3/381—Dispersed generators
    • 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]
    • 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/28—The renewable source being wind energy
    • 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/40—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation wherein a plurality of decentralised, dispersed or local energy generation technologies are operated simultaneously
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S50/00—Market activities related to the operation of systems integrating technologies related to power network operation or related to communication or information technologies
    • Y04S50/14—Marketing, i.e. market research and analysis, surveying, promotions, advertising, buyer profiling, customer management or rewards

Landscapes

  • Business, Economics & Management (AREA)
  • Engineering & Computer Science (AREA)
  • Strategic Management (AREA)
  • Human Resources & Organizations (AREA)
  • Economics (AREA)
  • Development Economics (AREA)
  • Entrepreneurship & Innovation (AREA)
  • Marketing (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Physics & Mathematics (AREA)
  • General Business, Economics & Management (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Game Theory and Decision Science (AREA)
  • Tourism & Hospitality (AREA)
  • Power Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Educational Administration (AREA)
  • Primary Health Care (AREA)
  • Operations Research (AREA)
  • Quality & Reliability (AREA)
  • Water Supply & Treatment (AREA)
  • Data Mining & Analysis (AREA)
  • Public Health (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention discloses a power grid additional cost evaluation method considering grid connection risk of multiple types of power supplies. And then analyzing the system frequency risk, the voltage risk and the active balance risk brought by the grid connection of various power supplies, and calculating the grid frequency risk adjustment cost, the voltage risk adjustment cost and the active power risk adjustment cost. And finally, calculating the additional total cost of the power grid with various power grid connection risks. The method provided by the invention is simple in operability; the additional cost is divided according to the cost driving factor as a standard, and the real situation of the grid-connected additional cost evaluation of various power supplies can be reflected by considering various factors with clear causal relationship.

Description

Power grid additional cost evaluation method considering multi-kind power grid connection risk
Technical Field
The invention relates to the technical field of power system cost evaluation, in particular to a power grid additional cost evaluation method considering grid-connected risks of various power supplies.
Background
Along with the continuous improvement of the power generation proportion of new energy sources such as wind, light and the like, a trend of supplying power to various power sources is formed, when the various power sources are connected in a grid, certain impact is caused on the power grid, the stable operation of the system is affected, and the additional cost for maintaining the stable operation of the power grid is increased. At present, no method is available for evaluating the additional cost of the grid connection of various power supplies, and the additional adjustment cost caused by the risk of the grid connection of the various power supplies is evaluated, so that the influence of the grid connection of the various power supplies on the economy of the power grid is better understood by comprehensively considering the power grid frequency risk adjustment cost, the voltage risk adjustment cost and the active power risk adjustment cost.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a power grid additional cost evaluation method considering the grid connection risk of various power supplies.
In order to solve the technical problems, the invention adopts the following technical scheme: a power grid additional cost evaluation method considering multi-kind power grid connection risk comprises the following steps:
step 1: collecting various power supply data and load side data which participate in grid connection;
the power supply data and the load side data include: reference voltage U 0 Active power P consumed by load L Line equivalent reactance R+jX, active power of thermal power generating unitPower P G Active power P of wind farm W Active power P of photovoltaic PV Reactive power Q of thermal power generating unit G Reactive power Q of wind farm W Reactive power Q of a photovoltaic power plant PV Thermal power unit adjustment difference coefficient sigma, thermal power unit environment punishment cost c pun,G Cost coefficient a of fuel cost of thermal power unit G Ac bus normal voltage U considered in reactive power equipment design acN 。
Step 2: by calculating the power adjustment quantity of the thermal power generating unitCalculating the system frequency risk adjustment cost C Δf The formula is as follows:
wherein C is Δf For the conventional thermal power generating unit to participate in the frequency adjustment cost, N G Delta P is the number of thermal power units in the system G,i The active power adjustment quantity, c, of the thermal power unit i pun,G,i Punishment cost is given to unit environment of the thermal power generating unit; a, a G,i The unit output cost of the thermal power unit i is; u (u) G,i For the start-stop state of the unit i, u G,i 1 represents a unit i start; u (u) Gn A value of 0 indicates that the unit i is stopped;
the power regulating quantity of the thermal power generating unitThe calculation process of (2) is as follows:
calculating per unit value K of unit regulating power of thermal power unit G* ：
Wherein: n (N) G Is the number of thermal power generating units in the system; p (P) GN,i The rated active power of the thermal power generating unit i;f N rated frequency for the system; Δf is the frequency adjustment amount; ΔP G,i The active power adjustment quantity of the thermal power generating unit i;
the unit adjusting power and the difference adjusting coefficient of the thermal power unit are reciprocal, and the per unit value of the unit adjusting power of the thermal power unit is calculated
Wherein: sigma is the difference adjustment coefficient of the thermal power generating unit;
calculating power adjustment quantity of thermal power generating unit
Step 3: considering the voltage influence on the power grid after the grid connection of various power supplies, the voltage regulation is related to reactive power regulation in the system, and the voltage risk regulation cost C is calculated by calculating the reactive power regulation quantity delta Q of the system ΔU The formula is as follows:
wherein Δq is the reactive power adjustment amount; n (N) H The number of reactive compensation devices; c H,n The unit compensation cost for the reactive compensation equipment n;
the calculation process of the reactive power adjustment quantity delta Q of the system is as follows:
calculating the AC bus voltage U ac ：
Wherein: u (U) 0 For reference voltage value, N G N is the number of conventional thermal power generating units in the system W N is the number of wind power plants PV For the number of photovoltaic power stations, R, X is the equivalent impedance of the lines, P G,i 、P W,j 、P PV,k Active power of thermal power unit i, wind power station j and photovoltaic power station k respectively, Q G,i 、Q W,j 、Q PV,k Reactive power of the thermal power unit i, the wind power plant j and the photovoltaic power station k are respectively;
the voltage regulation is related to reactive power regulation in the system, and the reactive power regulation quantity delta Q of the system is calculated:
wherein: u (U) ac Is the current alternating current bus voltage; u (U) acN The normal voltage of the alternating current bus is considered in the design of reactive equipment; q (Q) total The total reactive power after the reactive compensation equipment is currently put into the system; q (Q) dc Reactive power loss for converter station consumption; q (Q) ac Is the reactive power of the alternating current system.
Step 4: calculating the active power risk adjustment cost C by calculating the active power adjustment quantity delta P in the system ΔP The formula is as follows:
C ΔP ＝αΔPκc pun,W +βΔPνc pun,PV +γΔP(c pun,G +a G )
wherein alpha, beta and gamma are respectively the wind discarding cost, the light discarding cost and the output cost coefficient of the thermal power unit; alpha is 0, and represents complete wind power consumption in the t period; alpha is 1, and the phenomenon of wind abandoning exists in the period t; beta is 0 to indicate complete photoelectric absorption in the t period; beta is 1, and the light rejection phenomenon exists in the t period; gamma is 0, and the output adjustment of the thermal power unit is not needed in the t period; gamma is 1, and represents the output adjustment of the thermal power unit in the t period; kappa is the total energy rejection proportion of the abandoned wind; c pun,W Punishment cost for unit abandoned wind; v is the total energy rejection ratio of the reject; c pun,PV Unit light rejection punishmentPenalty cost; c pun,G Punishment cost is given to unit environment of the thermal power generating unit; a, a G The unit output cost of the thermal power generating unit;
the calculation process of the active power adjustment quantity delta P in the system is as follows:
wherein: p (P) L Active power for load;the total active power emitted by the thermal power generating unit in the system; />The total active power emitted by the wind power field of the system; />Is the total active power of the photovoltaic power station in the system.
Step 5: calculating the additional cost F of the power grid of various power grid connection risks:
F＝C Δf +C ΔU +C ΔP
and evaluating the grid additional cost of the grid-connected risks of the multiple types of power supplies according to the specific numerical value of the grid additional cost F of the grid-connected risks of the multiple types of power supplies.
The beneficial effects of adopting above-mentioned technical scheme to produce lie in: the method provided by the invention is simple in operability; the additional cost is divided according to the cost driving factor as a standard, and the real situation of the grid-connected additional cost evaluation of various power supplies can be reflected by considering various factors with clear causal relationship.
Drawings
Fig. 1 is a flowchart of a method for evaluating additional costs of a power grid, which considers grid-connected risks of multiple types of power sources according to an embodiment of the present invention.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
As shown in fig. 1, the method for evaluating the additional cost of the power grid taking into consideration the grid connection risk of the multiple types of power sources in the present embodiment is as follows:
step 1: collecting various power supply data and load side data which participate in grid connection;
the power supply data and the load side data include: reference voltage U 0 Active power P consumed by load L Line equivalent reactance R+jX, active power P of thermal power generating unit G Active power P of wind farm W Active power P of photovoltaic PV Reactive power Q of thermal power generating unit G Reactive power Q of wind farm W Reactive power Q of a photovoltaic power plant PV Thermal power unit adjustment difference coefficient sigma, thermal power unit environment punishment cost c pun,G Cost coefficient a of fuel cost of thermal power unit G Ac bus normal voltage U considered in reactive power equipment design acN 。
Step 2: by calculating the power adjustment quantity of the thermal power generating unitCalculating the system frequency risk adjustment cost C Δf The formula is as follows:
wherein C is Δf For the conventional thermal power generating unit to participate in the frequency adjustment cost, N G Delta P is the number of thermal power units in the system G,i The active power adjustment quantity, c, of the thermal power unit i pun,G,i Punishment cost is given to unit environment of the thermal power generating unit; a, a G,i The unit output cost of the thermal power unit i is; u (u) G,i For the start-stop state of the unit i, u G,i 1 represents a unit i start; u (u) Gn A value of 0 indicates that the unit i is stopped;
the power regulating quantity of the thermal power generating unitThe calculation process of (2) is as follows:
calculating per unit value of unit regulating power of thermal power unit
Wherein: n (N) G Is the number of thermal power generating units in the system; p (P) GN,i The rated active power of the thermal power generating unit i; f (f) N Rated frequency for the system; Δf is the frequency adjustment amount; ΔP G,i The active power adjustment quantity of the thermal power generating unit i;
the unit adjusting power and the difference adjusting coefficient of the thermal power unit are reciprocal, and the per unit value of the unit adjusting power of the thermal power unit is calculated
Wherein: sigma is the difference adjustment coefficient of the thermal power generating unit, and the difference adjustment coefficient of the thermal power generating unit is generally 4% -5%. The method comprises the steps of carrying out a first treatment on the surface of the
Calculating power adjustment quantity of thermal power generating unit
In the embodiment, the difference adjustment coefficient sigma=5% of the thermal power generating unit is measured, and the rated frequency f of the system is calculated N =50 Hz, the frequency adjustment Δf=0.5 Hz, the rated power of 3 thermal power generating units is 300mw,200 respectivelyMW,100MW. Substituting into a calculation formula of the power adjustment quantity of the thermal power generating unit to obtain
Measuring unit environment punishment cost c of thermal power generating unit pun,G,i 100 yuan/MW; thermal power unit i unit output cost a G,i 600 yuan/MW. Substituting the calculation formula of the system frequency risk adjustment cost to obtain C Δf =78000 yuan.
Step 3: considering the voltage influence on the power grid after the grid connection of various power supplies, the voltage regulation is related to reactive power regulation in the system, and the voltage risk regulation cost C is calculated by calculating the reactive power regulation quantity delta Q of the system ΔU The formula is as follows:
wherein Δq is the reactive power adjustment amount; n (N) H The number of reactive compensation devices; c H,n The unit compensation cost for the reactive compensation equipment n;
the calculation process of the reactive power adjustment quantity delta Q of the system is as follows:
calculating the AC bus voltage U ac ：
Wherein: u (U) 0 For reference voltage value, N G N is the number of conventional thermal power generating units in the system W N is the number of wind power plants PV The number of the photovoltaic power stations is R, X, which are equivalent components of the circuit, P G,i 、P W,j 、P PV,k Active power of thermal power unit i, wind power station j and photovoltaic power station k respectively, Q G,i 、Q W,j 、Q PV,k Reactive power of the thermal power unit i, the wind power plant j and the photovoltaic power station k are respectively;
the voltage regulation is related to reactive power regulation in the system, and the reactive power regulation quantity delta Q of the system is calculated:
wherein: u (U) ac Is the current alternating current bus voltage; u (U) acN The normal voltage of the alternating current bus is considered in the design of reactive equipment; q (Q) total The total reactive power after the reactive compensation equipment is currently put into the system; q (Q) dc Reactive power loss for converter station consumption; q (Q) ac Is the reactive power of the alternating current system.
In the present embodiment, the voltage value U is measured 0 Number N of conventional thermal power units in system =220 kv G Number of wind farms n=3 W Number N of photovoltaic power plants =2 PV The equivalent group reactance of the line is r=30 and x=40 respectively, the active power of the thermal power unit, the wind power plant and the photovoltaic power station is 300mw,200mw,100mw,150mw,100mw and 50mw respectively, and the reactive power of the thermal power unit, the wind power plant and the photovoltaic power station is 80mvar,60mvar,20mvar,40mvar,20mvar and 10mvar respectively. Substituting the calculated formula of the voltage of the alternating current bus to obtain U ac ＝607.41kv。
Ac bus normal voltage U considered in reactive equipment design acN =600 kv; total reactive power Q of system after being currently put into reactive power compensation equipment total =250 Mvar; reactive power loss Q consumed by converter station dc =20 Mvar; reactive Q of AC system ac =230 Mvar. Substituting the calculated value into a system reactive power adjustment quantity calculation formula to obtain delta Q= -6.213Mvar.
The number of reactive compensation equipment in the system is N H The unit compensation cost of the reactive compensation device is 20000 yuan/Mvar, 20500 yuan/Mvar, 21000 yuan/Mvar, 19500 yuan/Mvar, 19800 yuan/Mvar, 20000 yuan/Mvar, respectively. Substituting the calculation formula of the voltage risk adjustment cost to obtain C ΔU = 125386.4169 yuan.
Step 4: calculating the active power risk adjustment cost C by calculating the active power adjustment quantity delta P in the system ΔP The formula is as follows:
C ΔP ＝αΔPκc pun,W +βΔPνc pun,PV +γΔP(c pun,G +a G )
wherein alpha, beta and gamma are respectively the wind discarding cost, the light discarding cost and the output cost coefficient of the thermal power unit; alpha is 0, and represents complete wind power consumption in the t period; alpha is 1, and the phenomenon of wind abandoning exists in the period t; beta is 0 to indicate complete photoelectric absorption in the t period; beta is 1, and the light rejection phenomenon exists in the t period; gamma is 0, and the output adjustment of the thermal power unit is not needed in the t period; gamma is 1, and represents the output adjustment of the thermal power unit in the t period; kappa is the total energy rejection proportion of the abandoned wind; c pun,W Punishment cost for unit abandoned wind; v is the total energy rejection ratio of the reject; c pun,PV Punishment cost is given for unit light rejection; c pun,G Punishment cost is given to unit environment of the thermal power generating unit; a, a G The unit output cost of the thermal power generating unit;
the calculation process of the active power adjustment quantity delta P in the system is as follows:
wherein: p (P) L Active power for load;the total active power emitted by the thermal power generating unit in the system; />The total active power emitted by the wind power field of the system; />Is the total active power of the photovoltaic power station in the system.
In the present embodiment, the load active power P is measured L Total active power emitted by thermal power generating unit in system of =860 MWTotal active power emitted by wind power field of system +.>Total active power of photovoltaic power station in system +.>Substituting the calculated value into an active power adjustment quantity calculation formula in the system to obtain delta P= -40MW.
With Δp < 0, α=1, β=1, γ=0, and the total energy rejection ratio of the wind to the wind is measured κ=80%; unit wind disposal penalty cost c pun,W =1000 yuan/MW; the total energy rejection ratio v=20%; unit light rejection penalty cost c pun,PV =1500 yuan/MW. Substituting into an active power risk adjustment cost calculation formula to obtain C ΔP =44000 yuan.
Step 5: calculating the additional cost F of the power grid of various power grid connection risks:
F＝C Δf +C ΔU +C ΔP
in this embodiment, the calculated results in steps 2, 3, and 4 are substituted into the above formula to obtain f= 247386.4169, i.e. the total additional cost of the system risk is 247386.4169 yuan.
And evaluating the grid additional cost of the grid-connected risks of the multiple types of power supplies according to the specific numerical value of the grid additional cost F of the grid-connected risks of the multiple types of power supplies.

Claims (1)

1. The power grid additional cost evaluation method considering the grid connection risk of various power supplies is characterized by comprising the following steps of:
step 1: collecting various power supply data and load side data which participate in grid connection;
step 2: by calculating the power adjustment quantity of the thermal power generating unitThereby calculating the participation frequency adjustment cost C of the conventional thermal power generating unit Δf The formula is as follows:
calculating the participation frequency adjustment cost C of conventional thermal power generating unit Δf ：
Wherein C is Δf For the conventional thermal power generating unit to participate in the frequency adjustment cost, N G Delta P is the number of thermal power units in the system G,i The active power adjustment quantity, c, of the thermal power unit i pun,G,i Punishment cost is given to unit environment of the thermal power generating unit; a, a G,i The unit output cost of the thermal power unit i is; u (u) G,i For the start-stop state of the unit i, u G,i 1 represents a unit i start; u (u) G,i A value of 0 indicates that the unit i is stopped;
by calculating per unit value K of unit regulating power of thermal power unit G* Calculating the power adjustment quantity of the thermal power generating unit
Wherein: n (N) G Is the number of thermal power generating units in the system; p (P) GN,i The rated active power of the thermal power generating unit i; f (f) N Rated frequency for the system; Δf is the frequency adjustment amount; ΔP G,i The active power adjustment quantity of the thermal power generating unit i;
the unit adjusting power and the difference adjusting coefficient of the thermal power unit are reciprocal, and the per unit value of the unit adjusting power of the thermal power unit is calculated
Wherein: sigma is the difference adjustment coefficient of the thermal power generating unit;
calculation of firePower regulation of motor unit
Wherein: n (N) G Is the number of thermal power generating units in the system; p (P) GN,i The rated active power of the thermal power generating unit i; f (f) N Rated frequency for the system; Δf is the frequency adjustment amount; ΔP G,i The active power adjustment quantity of the thermal power generating unit i; sigma is the difference adjustment coefficient of the thermal power generating unit;
step 3: considering the voltage influence on the power grid after the grid connection of various power supplies, the voltage regulation is related to reactive power regulation in the system, and the voltage risk regulation cost C is calculated by calculating the reactive power regulation quantity delta Q of the system ΔU The formula is as follows:
wherein DeltaQ is reactive power adjustment quantity; n (N) H The number of reactive compensation devices; c H,n The unit compensation cost for the reactive compensation equipment n;
wherein, the reactive power adjustment quantity DeltaQ of the system is as follows:
calculating the AC bus voltage U ac ：
Wherein: u (U) 0 For reference voltage value, N G N is the number of conventional thermal power generating units in the system W N is the number of wind power plants PV The number of the photovoltaic power stations is R, X, which are equivalent components of the circuit, P G,i 、P W,j 、P PV,k Respectively a thermal power unit i, a wind power plant j and photovoltaic electricityActive power of station k, Q G,i 、Q W,j 、Q PV,k Reactive power of the thermal power unit i, the wind power plant j and the photovoltaic power station k are respectively;
the voltage regulation is related to reactive power regulation in the system, and the reactive power regulation quantity delta Q of the system is calculated as follows:
wherein: u (U) ac Is the current alternating current bus voltage; u (U) acN The normal voltage of the alternating current bus is considered in the design of reactive equipment; q (Q) total The total reactive power after the reactive compensation equipment is currently put into the system; q (Q) dc Reactive power loss for converter station consumption; q (Q) ac Reactive power of the alternating current system;
step 4: calculating the active power risk adjustment cost C by calculating the active power adjustment quantity delta P in the system ΔP The formula is as follows:
C ΔP ＝αΔPκc pun,W +βΔPνc pun,PV +γΔP(c pun,G +a G )
wherein alpha, beta and gamma are respectively the wind discarding cost, the light discarding cost and the output cost coefficient of the thermal power unit; alpha is 0, and represents complete wind power consumption in the t period; alpha is 1, and the phenomenon of wind abandoning exists in the period t; beta is 0 to indicate complete photoelectric absorption in the t period; beta is 1, and the light rejection phenomenon exists in the t period; gamma is 0, and the output adjustment of the thermal power unit is not needed in the t period; gamma is 1, and represents the output adjustment of the thermal power unit in the t period; kappa is the total energy rejection proportion of the abandoned wind; c pun,W Punishment cost for unit abandoned wind; v is the total energy rejection ratio of the reject; c pun,PV Punishment cost is given for unit light rejection; c pun,G Punishment cost is given to unit environment of the thermal power generating unit; a, a G The unit output cost of the thermal power generating unit;
wherein, the formula of the active power adjustment quantity delta P of the system is as follows:
wherein: p (P) L Active power for load;the total active power emitted by the thermal power generating unit in the system; />The total active power emitted by the wind power field of the system; />The total active power of the photovoltaic power station in the system;
step 5: calculating the additional cost F of the power grid of various power grid connection risks:
F＝C Δf +C ΔU +C ΔP 。
CN202110598751.8A 2021-05-31 2021-05-31 Power grid additional cost evaluation method considering multi-kind power grid connection risk Active CN113313385B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110598751.8A CN113313385B (en) 2021-05-31 2021-05-31 Power grid additional cost evaluation method considering multi-kind power grid connection risk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110598751.8A CN113313385B (en) 2021-05-31 2021-05-31 Power grid additional cost evaluation method considering multi-kind power grid connection risk

Publications (2)

Publication Number Publication Date
CN113313385A CN113313385A (en) 2021-08-27
CN113313385B true CN113313385B (en) 2024-04-16

Family

ID=77376360

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110598751.8A Active CN113313385B (en) 2021-05-31 2021-05-31 Power grid additional cost evaluation method considering multi-kind power grid connection risk

Country Status (1)

Country Link
CN (1) CN113313385B (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104380555A (en) * 2012-10-02 2015-02-25 株式会社东芝 Power generation plan formulation system for small-scale power system and method therefor
JP5864821B1 (en) * 2014-07-24 2016-02-17 三菱電機株式会社 Supply / demand control device, charge / discharge control device, power storage device, supply / demand control system, and supply / demand control method
CN107681654A (en) * 2017-09-06 2018-02-09 国网福建省电力有限公司经济技术研究院 Consider the Multi-Objective Electric Power Network Planning method and apparatus of new energy consumption and environmental benefit
CN111047346A (en) * 2019-10-29 2020-04-21 国网浙江省电力有限公司舟山供电公司 Local area collaborative reactive compensation service value making method
CN111159641A (en) * 2019-11-28 2020-05-15 广东电网有限责任公司 Power grid comprehensive difficulty risk assessment method
AU2020101665A4 (en) * 2020-08-04 2020-09-10 Beijing Electric Power Trading Center Co., Ltd A compensation cost allocation method for auxiliary service of peak load regulation
CN112163771A (en) * 2020-09-29 2021-01-01 华北电力大学（保定） Multi-index comprehensive weight reliability electricity price making method considering incremental cost

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110401192B (en) * 2019-08-09 2022-09-16 长沙理工大学 Power system dynamic economic dispatching method considering optimal load transfer proportion and optimal wind and light grid-connection proportion

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104380555A (en) * 2012-10-02 2015-02-25 株式会社东芝 Power generation plan formulation system for small-scale power system and method therefor
JP5864821B1 (en) * 2014-07-24 2016-02-17 三菱電機株式会社 Supply / demand control device, charge / discharge control device, power storage device, supply / demand control system, and supply / demand control method
CN107681654A (en) * 2017-09-06 2018-02-09 国网福建省电力有限公司经济技术研究院 Consider the Multi-Objective Electric Power Network Planning method and apparatus of new energy consumption and environmental benefit
CN111047346A (en) * 2019-10-29 2020-04-21 国网浙江省电力有限公司舟山供电公司 Local area collaborative reactive compensation service value making method
CN111159641A (en) * 2019-11-28 2020-05-15 广东电网有限责任公司 Power grid comprehensive difficulty risk assessment method
AU2020101665A4 (en) * 2020-08-04 2020-09-10 Beijing Electric Power Trading Center Co., Ltd A compensation cost allocation method for auxiliary service of peak load regulation
CN112163771A (en) * 2020-09-29 2021-01-01 华北电力大学（保定） Multi-index comprehensive weight reliability electricity price making method considering incremental cost

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
浅析风电场接入电网对电力系统的影响;崔志飞;孙晨光;只群;王小宇;;资源节约与环保(第12期);第5页 *
风电入网风险量化及对电力系统优化调度影响;任惠;范佳琪;David Watts;向安;丁茂生;;可再生能源(第04期);第558-563页 *

Also Published As

Publication number Publication date
CN113313385A (en) 2021-08-27

Similar Documents

Publication Publication Date Title
CN107732949A (en) A kind of energy storage of the annual more Seasonal Characteristics of comprehensive wind-powered electricity generation is layouted constant volume method
CN113555590B (en) Multi-fuel cell module power generation system and control method thereof
CN110661301B (en) Capacity allocation optimization method for water-light-storage multi-energy complementary power generation system
CN112086998B (en) Energy optimization scheduling method for direct-current micro-grid in island mode
CN103544656A (en) Active power distribution network operational control method based on minimum carbon emission
CN116131276A (en) Offshore wind power reactive power compensation optimization calculation method and system based on power factors
CN110783927B (en) Multi-time scale AC/DC power distribution network scheduling method and device
CN113313385B (en) Power grid additional cost evaluation method considering multi-kind power grid connection risk
CN116544992A (en) Energy storage control method for reducing transformer loss by power grid side energy storage
Letting et al. Dynamic performance analysis of an integrated wind-photovoltaic microgrid with storage
CN115689244A (en) Multi-type load day-ahead scheduling method and device
CN112039057B (en) Low-voltage treatment method based on two-stage scheduling
Sharma et al. Optimized Electric vehicle Charging and discharging with sporadic Renewable energy source
CN113221358A (en) Standby output optimization method of electric-gas coupling system based on reliability parameters
Hao et al. Research on optimization scheduling of wind/solar/diesel/storage micro-grid based on genetic algorithm
Ge et al. Low-carbon economic dispatch of distribution network with carbon capture power plant considering carbon trading
CN112510747A (en) High-voltage direct-current feed-in power regulation time point selection method
Wang et al. Research on microgrid emission reduction mechanism and emission reduction calculation method
Wang et al. Coordinated optimization Method for Distribution Areas Considering User Willingness and Regulation Cost
CN113361133B (en) Energy consumption monitoring method and system for energy storage power station
Liao et al. Modeling and Active Power Control of a Hydropower-Dominant Hybrid Energy System
CN117353347A (en) Flexible interconnection power distribution network power balancing method considering random load and hydrogen energy storage
CN116599115B (en) Flexible low-frequency power transmission system optimal operation method, device and equipment based on dynamic voltage adjustment and storage medium
Li et al. Orderly grid-connected cooperative scheduling control strategy based on distributed energy storage for electric vehicles
Manaullah et al. A controller model for integration of hybrid energy system into the grid

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
TA01 Transfer of patent application right
TA01 Transfer of patent application right

Effective date of registration: 20230804

Address after: 010020 No. 11 Erdos East Street, Saihan District, Hohhot City, Inner Mongolia Autonomous Region

Applicant after: STATE GRID EAST INNER MONGOLIA ELECTRIC POWER Co.,Ltd.

Applicant after: SHENYANG INSTITUTE OF ENGINEERING

Applicant after: STATE GRID CORPORATION OF CHINA

Address before: 010020 No. 11 Erdos East Street, Saihan District, Hohhot City, Inner Mongolia Autonomous Region

Applicant before: STATE GRID EAST INNER MONGOLIA ELECTRIC POWER Co.,Ltd.

Applicant before: SHENYANG INSTITUTE OF ENGINEERING

GR01 Patent grant
GR01 Patent grant