CN108390415B - Method and system for calculating new energy consumption capacity of regional power grid - Google Patents
Method and system for calculating new energy consumption capacity of regional power grid Download PDFInfo
- Publication number
- CN108390415B CN108390415B CN201810090132.6A CN201810090132A CN108390415B CN 108390415 B CN108390415 B CN 108390415B CN 201810090132 A CN201810090132 A CN 201810090132A CN 108390415 B CN108390415 B CN 108390415B
- Authority
- CN
- China
- Prior art keywords
- capacity
- power grid
- new energy
- regional power
- output
- 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
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention provides a method and a system for calculating new energy consumption capacity of a regional power grid, wherein the method comprises the following steps: calculating the new energy consumption capacity of the regional power grid after considering peak regulation constraint according to the power grid operation mode; decomposing new energy access capacity which is not more than the new energy consumption capacity of the regional power grid into each subarea power grid of the regional power grid; and when the new energy access capacity of each subarea power grid meets the safety and stability requirements, determining the new energy consumption capacity of the regional power grid according to the new energy access capacity of each subarea power grid. The method and the system comprehensively consider the main factors limiting the new energy accepting capacity such as peak regulation constraint, safety and stability constraint and the like, and provide reference and basis for power grid dispatching operation and government issuing related policies.
Description
Technical Field
The invention belongs to the technical field of electric power, and particularly relates to a method and a system for calculating new energy consumption capacity of a regional power grid.
Background
Different from the conventional energy, the new energy output has the characteristics of intermittence, volatility, poor predictability and the like. After the large-scale new energy is connected to the grid, the randomness and the fluctuation of the output of the new energy bring multi-party influence to the power grid, the new energy consumption is more prominent, and the system peak regulation is an important aspect to be considered. New energy consumption work has become the focus of attention of all social parties.
Accurate calculation of the consumption capacity of the new energy is an effective way for improving the consumption level of the new energy. At present, most of the research on the new energy consumption capacity is carried out from the perspective of considering the peak shaving capacity of a power grid. The typical day extreme condition that the new energy has the largest output and the smallest load is usually selected, and the electric power and electric quantity balance condition of the whole power grid is analyzed to determine the new energy consumption capacity of the power grid; or the calculation time length is month or year, and the electric power and electric quantity balance condition of the power grid is simulated time by simulating the time sequence of the new energy output characteristic and the load characteristic. At present, a new energy consumption capacity calculation method comprehensively considering various factors for limiting new energy admission is lacked.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a method and a system for calculating the new energy consumption capacity of a regional power grid. The method and the system firstly calculate and consider the new energy consumption capacity of the regional power grid after peak shaving restriction according to the operation mode of actual scheduling of the power grid and comprehensively considering factors such as unit output influence, tie line adjustment, system spinning reserve capacity, local hydroelectric power grid power and the like, and judge whether a new energy peak shaving gap exists in the regional power grid under the operation mode. And secondly, partitioning the regional power grid, and analyzing whether each partitioned power grid meets the requirements of safety and stability after new energy after peak shaving constraint is accessed. And finally, calculating the new energy consumption capability of the whole region after the peak regulation and safety and stability constraints are comprehensively considered.
The adopted solution for realizing the purpose is as follows:
the improvement of a method for calculating the new energy consumption capacity of a regional power grid is as follows:
calculating the new energy consumption capacity of the regional power grid after considering peak regulation constraint according to the power grid operation mode;
decomposing new energy access capacity which is not more than the new energy consumption capacity of the regional power grid into each subarea power grid of the regional power grid;
and when the new energy access capacity of each subarea power grid meets the safety and stability requirements, determining the new energy consumption capacity of the regional power grid according to the new energy access capacity of each subarea power grid.
In a first preferred technical solution provided by the present invention, the improvement is that calculating the new energy consumption capacity of the regional power grid after considering peak shaving constraints according to the power grid operation mode includes:
calculating the highest output and the lowest output of the conventional unit full starter of the regional power grid according to the power grid operation mode;
calculating the dispatching capacity of the conventional unit after considering peak dispatching constraint according to the maximum output of the full-open machine;
and calculating the new energy consumption capacity of the regional power grid according to the mediation capacity.
According to a second preferred technical scheme provided by the invention, the improvement is that the maximum power output and the minimum power output of the full-open machine of the conventional unit of the regional power grid are calculated according to the power grid operation mode as follows:
P Gmax ＝P gmax fire +P Gmax water +P Gmax nucleus (1)
P Gmin ＝P Gmin fire +P Gmin water +P Core of Gmin (2)
Wherein, P Gmax Is the highest output of the full starter of the conventional unit, P Gmax fire The maximum output of a full open machine of a thermal power generating unit, P Gmax water The highest output of the full opening machine of the hydroelectric generating set, P Gmax nucleus Is the highest output of a full open machine of a nuclear power unit, P Gmin Is the minimum starting-up minimum output, P, of the conventional unit Gmin fire Minimum starting-up minimum output of thermal power generating unit, P Gmin water The minimum starting-up minimum output, P, of the hydroelectric generating set Gmin nucleus The minimum starting-up minimum output of the nuclear power unit is obtained.
The third preferred technical solution provided by the present invention is improved in that the calculating according to the maximum output of the full-open machine and taking into consideration the back-to-back normal unit dispatching capacity under the peak dispatching constraint includes:
the conventional unit dispatch capacity after considering the peak-peak dispatch constraint is calculated as follows:
wherein:
peak shaving ability = maximum adjustable output-peak load forecast (4)
Maximum adjustable output = P Gmax + Peak Power-System Reserve Positive Standby Capacity-blocked Capacity (5)
And the dispatching capacity, the peak load forecast, the peak power receiving, the system reserved positive spare capacity and the blocked capacity in the minimum starting mode are preset according to the actual operation condition of the regional power grid.
In a fourth preferred technical solution provided by the present invention, the improvement of the method for calculating the new energy consumption capacity of the regional power grid according to the mediation capacity includes:
calculating the wind power and photovoltaic receiving capacity of the regional power grid by adopting the following formula:
P g wind ＝P Low valley /η Low wind (6)
P G light ＝P Waist lotus /η Light waist (7)
Wherein, P G wind For maximum consumption of wind power capacity, P, in the valley Low valley Is the valley peak-shaving ability, eta Low wind For a preset wind power simultaneous rate in the valley period, P G light Maximum photovoltaic capacity, P, for waist load Waist lotus Waist-load peak regulation ability, eta Light waist Setting the coincidence rate of the preset photovoltaic in the waist load time period;
the maximum wind power consumption in the valley is calculated as follows:
valley peak shaving ability = valley load forecast-minimum tunable output (8)
Waist load peak regulation capacity is calculated as follows:
waist load peak regulation capability = waist load forecast-minimum adjustable output (9)
The valley load prediction and waist load prediction are preset values, and the minimum adjustable output is calculated as follows:
the minimum adjustable output = low valley output-mediation capacity + low valley power reception + system reserved negative spare capacity (10);
and the valley output, the valley power receiving and the system reserved negative spare capacity are preset values.
In a fifth preferred technical solution provided by the present invention, the improvement is that decomposing the new energy access capacity not greater than the new energy consumption capacity of the regional power grid into each regional power grid of the regional power grid includes:
judging whether the regional power grid has a new energy peak regulation gap: when a gap exists, adjusting the new energy access capacity to the new energy consumption capacity of the regional power grid;
and decomposing the new energy access capacity to each subarea power grid of the regional power grid.
The improvement of the sixth preferred technical scheme provided by the invention is that whether the regional power grid has a new energy peak regulation gap is judged: when having the breach, adjust new forms of energy and insert capacity to regional electric wire netting new forms of energy consumption capacity includes:
comparing regional power grid photovoltaic prediction installed capacity P S light And P G light Judging whether a photovoltaic peak regulation gap exists in the regional power grid: if P S light >P G light If the photovoltaic peak regulation gap does not exist in the regional power grid; otherwise, the photovoltaic peak regulation gap exists in the regional power grid, and P is adjusted S light To P G light ；
Comparing regional power grid wind power prediction installed capacity P S wind And P G wind Judging whether a wind power peak regulation gap exists in the regional power grid: if P S wind >P G wind If the regional power grid has no wind power peak regulation gap; otherwise, the regional power grid has a wind power peak regulation gap, and P is adjusted S wind To P G wind 。
The seventh preferred technical solution provided by the present invention is improved in that the determination condition that the new energy access capacity of each partitioned power grid meets the requirement of safety and stability includes:
judging whether each subarea power grid of the regional power grid meets safety and stability requirements after the new energy is accessed, wherein the safety and stability requirements comprise: voltage fluctuation requirements, N-1 principle constraint, frequency stability constraint and power angle stability constraint;
and when any one subarea power grid does not meet the safety and stability requirement, adjusting the new energy access capacity of the subarea power grid to the capacity meeting the safety and stability requirement until the new energy access capacities of all subarea power grids meet the safety and stability requirement.
The eighth preferred technical solution provided by the present invention is improved in that the determining of the new energy consumption capacity of the regional power grid according to the new energy access capacity of each partitioned power grid includes:
and summing the new energy access capacities of all the subarea power grids meeting the safety and stability requirements to obtain the new energy consumption capacity of the regional power grid after considering peak shaving and safety and stability constraints.
In a regional power grid new energy storage capacity calculation system, the improvement comprising: the peak regulation constraint calculation module, the partition access capacity module and the comprehensive absorption capacity module;
the peak regulation constraint calculation module is used for calculating the new energy consumption capacity of the regional power grid after considering peak regulation constraint according to the power grid operation mode;
the subarea access capacity module is used for decomposing new energy access capacity which is not more than the new energy consumption capacity of the regional power grid into each subarea power grid of the regional power grid;
and the comprehensive consumption capacity module is used for determining the consumption capacity of the new energy of the regional power grid according to the access capacity of the new energy of each subarea power grid when the access capacity of the new energy of each subarea power grid meets the safety and stability requirements.
The ninth preferred technical scheme provided by the invention has the improvement that the peak regulation constraint calculation module comprises a highest output and lowest output calculation subunit, a mediation capacity calculation subunit and a peak regulation constraint capacity subunit;
the highest output and lowest output calculating subunit is used for calculating the highest output and the lowest output of the full-open machine of the conventional unit of the regional power grid according to the running mode of the power grid;
the mediation capacity calculation subunit is used for calculating the mediation capacity of the conventional unit after considering peak regulation constraint according to the highest output of the full-open machine;
and the peak regulation constraint capacity subunit is used for calculating the new energy consumption capacity of the regional power grid according to the regulation capacity.
The improvement of the tenth preferred technical proposal provided by the invention is that the subarea access capacity module comprises a gap judgment subunit and a subarea access subunit;
the judging subunit is configured to judge whether the regional power grid has a new energy peak regulation gap: when a gap exists, adjusting the new energy access capacity to the new energy consumption capacity of the regional power grid;
and the subarea access subunit is used for decomposing the new energy access capacity to each subarea power grid of the regional power grid.
Compared with the closest prior art, the invention has the following beneficial effects:
1. the method has comprehensive consideration factors and reasonable scheme, comprehensively considers the main factors for limiting the new energy accepting capacity such as peak regulation constraint, safety and stability constraint and the like, considers that the wind power plant and the photovoltaic power station have obvious regional distribution characteristics, analyzes whether each subarea of the regional power grid meets the safety and stability requirements or not, and provides reference and basis for relevant policies of power grid dispatching operation and government departure.
2. The new energy acceptance capacity which is calculated by taking the peak regulation constraint into consideration is based on the actual dispatching operation mode of the power grid, and factors such as unit output influence, tie line adjustment coefficient, system rotary backup capacity, local hydroelectric power grid power and the like are comprehensively considered
Drawings
Fig. 1 is a schematic flow chart of a method for calculating new energy consumption capacity of a regional power grid according to the present invention;
fig. 2 is a detailed flow diagram of a method for calculating the new energy consumption capacity of the regional power grid according to the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
The schematic flow chart of the method for calculating the new energy consumption capacity of the regional power grid, provided by the invention, is shown in fig. 1, and comprises the following steps:
step 1: calculating the new energy consumption capacity of the regional power grid after considering the peak regulation constraint according to the power grid operation mode;
step 2: decomposing new energy access capacity which is not more than the new energy consumption capacity of the regional power grid into each subarea power grid of the regional power grid;
and step 3: and when the new energy access capacity of each subarea power grid meets the safety and stability requirements, determining the new energy consumption capacity of the regional power grid according to the new energy access capacity of each subarea power grid.
Specifically, a detailed flow diagram of a method for calculating the new energy consumption capacity of the regional power grid is shown in fig. 2, and the method includes:
step 101: calculating the new energy consumption capability of the regional power grid after considering peak regulation constraint according to the operation mode;
step 101 comprises:
step 101-1: calculating the highest power output and the minimum power output of the full starter of the conventional unit of the regional power grid according to the operation mode; the calculation method is as follows:
P Gmax ＝P gmax fire +P Gmax water +P Gmax nucleus (1)
P Gmin ＝P Gmin fire +P Gmin water +P Gmin nucleus (2)
Wherein, P Gmax Is the highest output of the full starter of the conventional unit, P Gmax fire Is the highest output of the full starter of the thermal power generating unit, P Gmax water The highest output of the full opening machine of the hydroelectric generating set, P Gmax nucleus Is the highest output of the full-open machine of the nuclear power unit, P Gmin Minimum starting-up minimum output of conventional unit, P Gmin fire The minimum starting-up minimum output, P, of the thermal power generating unit Gmin water The minimum starting-up minimum output, P, of the hydroelectric generating set Core of Gmin The minimum starting-up minimum output of the nuclear power unit is obtained.
The regional power grid operation mode in step 101-1 includes: spring and autumn, summer average (under the average level of the power grid in 7-8 months), summer extreme (under the mode of large peak-valley difference of the power grid in 7-8 months), autumn average (under the average level of the power grid in 9-10 months), autumn flood extreme (under the mode of large peak-valley difference of the power grid in 9-10 months) and legal holiday (such as morning, national day and spring festival).
Step 101-2: calculating the dispatching capacity of the conventional unit after considering peak dispatching constraint;
considering that the conventional unit dispatching capacity is the small dispatching capacity in the minimum starting mode and the small peak dispatching capacity after the peak dispatching is restrained, the following calculation is performed:
wherein: peak shaving ability = maximum adjustable output-peak load forecast (4)
Maximum adjustable output = P Gmax + Peak Power-System Reserve Positive Standby Capacity-blocked Capacity (5)
And the dispatching capacity, the peak load forecast, the peak power receiving, the system reserved positive spare capacity and the blocked capacity in the minimum starting mode are preset according to the actual operation condition of the regional power grid.
Step 101-3: calculating the new energy consumption capacity of the regional power grid;
the steps 1-3 comprise the following steps:
101-3-1 calculating the minimum adjustable output
Minimum tunable output = valley output-mediation capacity + valley receive power + system reserved negative reserve capacity (10)
101-3-2 calculation of the Peak-to-Valley Capacity
Valley peak shaving ability = valley load forecast-minimum tunable output (8)
101-3-3 calculation of waist load peak regulation capability
Waist load peak regulation capability = waist load forecast-minimum adjustable output (9)
101-3-4 calculating regional power grid wind and photovoltaic receiving capacity:
101-3-4A, because the valley load is mostly at night, which is the time interval when the wind power generates a large amount of photovoltaic power and generates zero output, only the wind power consumption needs to be considered for the valley time interval, and then the maximum wind power consumption capacity in the valley is as follows:
P g wind ＝P Low valley /η Low wind (6)
101-3-4B because the photovoltaic large power generation power under the waist load mode is less, only the photovoltaic consumption is considered for neglecting the wind power for the waist load time period, and the maximum photovoltaic capacity consumed by the waist load is as follows:
P g light ＝P Waist lotus /η Light waist (7)
Wherein, P G wind For maximum consumption of wind power capacity, P, in the valley Low valley Is the valley peak-shaving ability, eta Low wind For a preset coincidence rate, P, of wind power in the valley period G light Maximum photovoltaic capacity, P, for waist load Waist lotus Waist-load peak regulation ability, eta Light waist The method is the coincidence rate of the preset photovoltaic in the waist load time period.
Step 102: judging whether a new energy peak regulation gap exists in the regional power grid under the operation mode; if yes, go to step 103, otherwise go to step 104;
step 102 specifically includes: comparing regional power grid photovoltaic prediction installed capacity P S light And P G light Judging whether a photovoltaic peak regulation gap exists in the regional power grid: if P S light >P G light If the regional power grid has no photovoltaic peak regulation gap; otherwise, a photovoltaic peak regulation gap exists in the regional power grid; comparing regional power grid wind power prediction installed capacity P S wind And P G wind Judging whether a wind power peak regulation gap exists in the regional power grid: if P S wind >P G wind If so, the wind power peak regulation gap does not exist in the regional power grid; otherwise, the regional power grid has a wind power peak regulation gap.
Step 103: adjusting the new energy grid-connected capacity to meet peak regulation constraint, specifically:
adjusting P S light To P G light ；
Adjusting P S wind To P G wind 。
Step 104: analyzing whether each subarea power grid meets the safety and stability requirements after the new energy access capacity which is not more than the new energy consumption capacity of the regional power grid is decomposed to each subarea power grid of the regional power grid; if yes, go to step 106; otherwise, go to step 105;
step 105: adjusting the new energy access capacity of the subarea power grid to the new energy consumption capacity of the subarea power grid;
because the distribution of the wind power plant and the photovoltaic power station has obvious regional characteristics, the regional power grid needs to be considered in a subarea mode when judging whether the regional power grid meets the safety and stability requirements after the new energy is accessed. Dividing a regional power grid into a plurality of partitions S 1 、S 2 、……、S n And judging whether each subarea power grid meets safety and stability constraints after being accessed with new energy.
Safety and stability requirements to be met include:
5-1 Voltage fluctuation requirement: when the output of new energy is increased from zero to the full-hair process, the voltage deviation of the grid-connected point is within the range of-3% -7% of the rated voltage.
5-2N-1 principle constraints: after the line or the transformer N-1 is disconnected, the bus voltage and the line power should meet given requirements.
5-3 frequency stability constraint: after the wind turbine generator or the photovoltaic power station is off-grid in a large scale due to serious faults, the power grid frequency meets the requirements.
5-4 power angle stable constraint: after a three-phase permanent N-1 fault occurs in a line or a transformer, the power angle of the power grid can recover to a stable level.
And when any one safety and stability requirement is not met, adjusting the new energy access capacity of the subarea power grid to the capacity meeting the safety and stability requirement until the new energy access capacity of all the subarea power grids meets all the safety and stability requirements.
Step 106: calculating new energy consumption capability after full-region consideration of peak regulation and safety and stability constraints
And summing the new energy access capacities of all the subarea power grids meeting the safety and stability requirements to obtain the new energy consumption capacity of the regional power grid after considering peak shaving and safety and stability constraints.
Based on the same invention concept, the invention also provides a system for calculating the new energy consumption capacity of the regional power grid.
The system comprises:
the peak regulation constraint calculation module, the partition access capacity module and the comprehensive absorption capacity module;
the peak regulation constraint calculation module is used for calculating the new energy consumption capacity of the regional power grid after the peak regulation constraint is considered according to the power grid operation mode;
the subarea access capacity module is used for decomposing new energy access capacity which is not more than the new energy consumption capacity of the regional power grid into each subarea power grid of the regional power grid;
and the comprehensive consumption capacity module is used for determining the new energy consumption capacity of the regional power grid according to the new energy access capacity of each subarea power grid when the new energy access capacity of each subarea power grid meets the safety and stability requirements.
The peak regulation constraint calculation module comprises a highest output and lowest output calculation subunit, a regulation capacity calculation subunit and a peak regulation constraint capacity subunit;
the highest output and lowest output calculating subunit is used for calculating the highest output and the lowest output of the full startup of the conventional unit of the regional power grid according to the power grid operation mode;
the regulating capacity calculating subunit is used for calculating the regulating capacity of the conventional unit after considering the peak regulation constraint according to the highest output of the full-open machine;
and the peak regulation constraint capacity quantum unit is used for calculating the new energy consumption capacity of the regional power grid according to the regulation capacity.
The highest output and the lowest output are calculated by the sub-unit, and the highest output and the lowest output of the full open machine of the conventional unit of the regional power grid are calculated by the following formulas:
P Gmax ＝P gmax fire +P Gmax water +P Gmax nucleus (1)
P Gmin ＝P Gmin fire +P Gmin water +P Core of Gmin (2)
Wherein, P Gmax Is the highest output of the full starter of the conventional unit, P Gmax fire The maximum output of a full open machine of a thermal power generating unit, P Gmax water The highest output of the full opening machine of the hydroelectric generating set, P Gmax nucleus Is the highest output of the full-open machine of the nuclear power unit, P Gmin Is the minimum starting-up minimum output, P, of the conventional unit Gmin fire The minimum starting-up minimum output, P, of the thermal power generating unit Gmin water Minimum power-on minimum output, P, of hydroelectric generating set Gmin nucleus The minimum starting-up minimum output of the nuclear power unit is obtained.
The mediation capacity calculation subunit calculates the new energy consumption capacity of the regional power grid according to the mediation capacity, and the new energy consumption capacity is as follows:
wherein:
peak shaving ability = maximum tunable output-peak load forecast (4)
Maximum adjustable output = P Gmax + Peak Power-System Reserve Positive Standby Capacity-blocked Capacity (5)
And the dispatching capacity, the peak load forecast, the peak power receiving, the system reserved positive spare capacity and the blocked capacity in the minimum starting mode are preset according to the actual operation condition of the regional power grid.
The peak regulation constrained capacity quantum unit calculates the new energy consumption capacity of the regional power grid as follows:
P g wind ＝P Low valley /η Low wind (6)
P G light ＝P Waist lotus /η Light waist (7)
Wherein, P G wind For maximum consumption of wind power capacity, P, in the valley Low valley Is the valley peak-shaving ability, eta Low wind For a preset coincidence rate, P, of wind power in the valley period G light Maximum photovoltaic capacity, P, for waist load Waist lotus Is the waist load peak regulation ability, eta Light waist The method comprises the steps of setting the coincidence rate of a preset photovoltaic in a waist load time period;
the maximum wind power consumption in the valley is calculated as follows:
valley peak shaving ability = valley load forecast-minimum tunable output (8)
Waist load peak regulation capacity is calculated as follows:
waist load peak regulation capability = waist load forecast-minimum adjustable output (9)
The valley load prediction and waist load prediction are preset values, and the minimum adjustable output is calculated as follows:
minimum adjustable output = valley output-arbitration capacity + valley powered + system reserved negative reserve capacity (10)
And the valley output, the valley power receiving and the system reserved negative spare capacity are preset values.
The partition access capacity module comprises a notch judgment subunit and a partition access subunit;
the judging subunit is configured to judge whether the regional power grid has a new energy peak shaving gap: when a gap exists, adjusting the new energy access capacity to the new energy consumption capacity of the regional power grid;
and the subarea access subunit is used for decomposing the new energy access capacity to each subarea power grid of the regional power grid.
Judging whether the regional power grid has a new energy peak regulation gap: when a gap exists, adjusting the new energy access capacity to the new energy consumption capacity of the regional power grid specifically comprises:
comparing regional power grid photovoltaic prediction installed capacity P S light And P G light Judging whether a photovoltaic peak regulation gap exists in the regional power grid: if P S light >P G light If the regional power grid has no photovoltaic peak regulation gap; otherwise, photovoltaic peak shaving gaps exist in the regional power grid, and P is adjusted S light To P G light ；
Comparing regional power grid wind power prediction installed capacity P S wind And P G wind Judging whether a wind power peak regulation gap exists in the regional power grid: if P S wind >P G wind If so, the wind power peak regulation gap does not exist in the regional power grid; otherwise, the regional power grid has a wind power peak regulation gap, and P is adjusted S wind To P G wind 。
The comprehensive consumption capacity module judges that the new energy access capacity of each subarea power grid meets the safety and stability requirement according to the judgment conditions that:
judging whether each subarea power grid of the regional power grid after the new energy is accessed meets the safety and stability requirements, wherein the safety and stability requirements comprise: voltage fluctuation requirements, N-1 principle constraint, frequency stability constraint and power angle stability constraint;
and when any one subarea power grid does not meet the safety and stability requirement, adjusting the new energy access capacity of the subarea power grid to the capacity meeting the safety and stability requirement until the new energy access capacities of all subarea power grids meet the safety and stability requirement.
The comprehensive consumption capacity module determines the consumption capacity of the new energy of the regional power grid according to the new energy access capacity of each subarea power grid, and the comprehensive consumption capacity module comprises the following steps:
and summing the new energy access capacities of all the subarea power grids meeting the safety and stability requirements to obtain the new energy consumption capacity of the regional power grid after considering peak shaving and safety and stability constraints.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present application and not for limiting the scope of protection thereof, and although the present application is described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that after reading the present application, they can make various changes, modifications or equivalents to the specific embodiments of the application, but these changes, modifications or equivalents are all within the scope of protection of the claims to be filed.
Claims (9)
1. A method for calculating new energy consumption capacity of a regional power grid is characterized by comprising the following steps:
calculating the new energy consumption capacity of the regional power grid after considering the peak regulation constraint according to the power grid operation mode;
decomposing new energy access capacity which is not more than the new energy consumption capacity of the regional power grid into each subarea power grid of the regional power grid;
when the new energy access capacity of each subarea power grid meets the safety and stability requirement, determining the new energy consumption capacity of the regional power grid according to the new energy access capacity of each subarea power grid;
the calculating the new energy consumption capacity of the regional power grid after considering the peak shaving restriction according to the power grid operation mode comprises the following steps:
calculating the highest output and the lowest output of the conventional unit full starter of the regional power grid according to the power grid operation mode;
calculating the regulation capacity of a conventional unit after considering peak regulation constraint according to the maximum output of the full-open machine;
calculating the new energy consumption capacity of the regional power grid according to the mediation capacity;
the method for calculating the new energy consumption capacity of the regional power grid according to the mediation capacity comprises the following steps:
calculating the wind power and photovoltaic receiving capacity of the regional power grid by adopting the following formula:
P g wind ＝P Low valley /η Low wind (6)
P G light ＝P Waist lotus /η Light waist (7)
Wherein, P G wind For maximum consumption of wind power capacity, P, in the valley Low valley Is the valley peak-shaving ability, eta Low wind For a preset coincidence rate, P, of wind power in the valley period G light Maximum photovoltaic capacity, P, for waist load Waist lotus Waist-load peak regulation ability, eta Light waist The method comprises the steps of setting the coincidence rate of a preset photovoltaic in a waist load time period;
the maximum wind power consumption capacity in the valley is calculated as follows:
valley peak shaving capability = valley load forecast-minimum adjustable output (8)
Waist load peak regulation capacity is calculated as follows:
waist load peak regulation capability = waist load forecast-minimum adjustable output (9)
The valley load forecast and waist load forecast are preset values and the minimum adjustable output is calculated as follows:
minimum adjustable output = valley output-arbitration capacity + valley powered + system reserved negative reserve capacity (10)
Wherein the valley power output, the valley power receiving and the system reserved negative spare capacity are preset values.
2. The method of claim 1, wherein the calculating the area grid regular unit all-on maximum output and the minimum all-on minimum output according to the grid operation mode is as follows:
P Gmax ＝P gmax fire +P Gmax water +P Gmax nucleus (1)
P Gmin ＝P Gmin fire +P Gmin water +P Core of Gmin (2)
Wherein, P Gmax Is a conventional unitMaximum power on, P Gmax fire The maximum output of a full open machine of a thermal power generating unit, P Gmax water The highest output of the full opening machine of the hydroelectric generating set, P Gmax nucleus Is the highest output of a full open machine of a nuclear power unit, P Gmin Is the minimum starting-up minimum output, P, of the conventional unit Gmin fire The minimum starting-up minimum output, P, of the thermal power generating unit Gmin water The minimum starting-up minimum output, P, of the hydroelectric generating set Gmin nucleus The minimum starting-up minimum output of the nuclear power unit.
3. The method of claim 2, wherein the calculating the full-starter maximum output takes into account a normal unit commissioning capacity after a peak shaver constraint, comprising:
the conventional unit dispatch capacity after the peak-peak regulation is considered is calculated as follows:
wherein:
peak shaving ability = maximum tunable output-peak load forecast (4)
Maximum adjustable output = P Gmax + Peak Power-System Reserve Positive Standby Capacity-blocked Capacity (5)
And the dispatching capacity, the peak load forecast, the peak power receiving, the system reserved positive spare capacity and the blocked capacity in the minimum starting mode are preset according to the actual operation condition of the regional power grid.
4. The method of claim 1, wherein decomposing new energy access capacity no greater than the regional power grid new energy consumption capacity into the regional power grids comprises:
judging whether the regional power grid has a new energy peak regulation gap: when a gap exists, adjusting the new energy access capacity to the new energy consumption capacity of the regional power grid;
and decomposing the new energy access capacity to each subarea power grid of the regional power grid.
5. The method of claim 4, wherein the determining whether the regional power grid has a new energy peak shaving gap: when there is the breach, adjust new forms of energy access capacity to regional electric wire netting new forms of energy consumption capacity includes:
comparing regional power grid photovoltaic prediction installed capacity P S light Maximum photovoltaic capacity P with waist load G light Judging whether a photovoltaic peak regulation gap exists in the regional power grid: if P S light >P G light If the photovoltaic peak regulation gap does not exist in the regional power grid; otherwise, the photovoltaic peak regulation gap exists in the regional power grid, and P is adjusted S light To P G light ；
Comparing regional power grid wind power prediction installed capacity P S wind Maximum wind power consumption P with valley G wind Judging whether a wind power peak regulation gap exists in the regional power grid: if P S wind >P G wind If so, the wind power peak regulation gap does not exist in the regional power grid; otherwise, the regional power grid has a wind power peak regulation gap, and P is adjusted S wind To P G wind 。
6. The method according to claim 1, wherein the determining that the new energy access capacity of each partitioned grid meets the safety and stability requirement includes:
judging whether each subarea power grid of the regional power grid meets safety and stability requirements after new energy is accessed, wherein the safety and stability requirements comprise: voltage fluctuation requirements, N-1 principle constraint, frequency stability constraint and power angle stability constraint;
and when any one subarea power grid does not meet the safety and stability requirement, adjusting the new energy access capacity of the subarea power grid to the capacity meeting the safety and stability requirement until the new energy access capacities of all subarea power grids meet the safety and stability requirement.
7. The method of claim 1, wherein determining the new energy consumption capacity of the regional power grid according to the new energy access capacity of each partitioned power grid comprises:
and summing the new energy access capacities of all the subarea power grids meeting the safety and stability requirements to obtain the new energy consumption capacity of the area power grid after considering peak regulation and safety and stability constraints.
8. A regional power grid new energy consumption capacity calculation system is characterized by comprising: the peak regulation constraint calculation module, the partition access capacity module and the comprehensive absorption capacity module;
the peak regulation constraint calculation module is used for calculating the new energy consumption capacity of the regional power grid after the peak regulation constraint is considered according to the power grid operation mode;
the subarea access capacity module is used for decomposing new energy access capacity which is not more than the new energy consumption capacity of the regional power grid into each subarea power grid of the regional power grid;
the comprehensive consumption capacity module is used for determining the new energy consumption capacity of the regional power grid according to the new energy access capacity of each subarea power grid when the new energy access capacity of each subarea power grid meets the safety and stability requirements;
the peak regulation constraint calculation module comprises a highest output and lowest output calculation subunit, a regulation capacity calculation subunit and a peak regulation constraint capacity subunit;
the highest output and lowest output calculating subunit is used for calculating the highest output and the lowest output of the full-open machine of the conventional unit of the regional power grid according to the running mode of the power grid;
the mediation capacity calculation subunit is used for calculating the mediation capacity of the conventional unit after considering peak regulation constraint according to the highest output of the full-open machine;
the peak regulation constraint capacity subunit is used for calculating the new energy consumption capacity of the regional power grid according to the regulation capacity;
the calculating of the new energy consumption capacity of the regional power grid according to the mediation capacity comprises the following steps:
calculating the wind power and photovoltaic receiving capacity of the regional power grid by adopting the following formula:
P g wind ＝P Low valley /η Low wind (6)
P G light ＝P Waist lotus /η Light waist (7)
Wherein, P G wind For maximum consumption of wind power capacity, P, in the valley Low valley Is the valley peak-shaving ability, eta Low wind For a preset wind power simultaneous rate in the valley period, P G light Maximum photovoltaic capacity, P, for waist load Waist lotus Waist-load peak regulation ability, eta Light waist The method comprises the steps of setting the coincidence rate of a preset photovoltaic in a waist load time period;
the maximum wind power consumption in the valley is calculated as follows:
valley peak shaving capability = valley load forecast-minimum adjustable output (8)
Waist load peak regulation capacity is calculated as follows:
waist load peak regulation capability = waist load forecast-minimum adjustable output (9)
The valley load prediction and waist load prediction are preset values, and the minimum adjustable output is calculated as follows:
minimum adjustable output = valley output-arbitration capacity + valley powered + system reserved negative reserve capacity (10)
And the valley output, the valley power receiving and the system reserved negative spare capacity are preset values.
9. The system of claim 8, wherein the partition access capacity module includes a gap determination subunit and a partition access subunit;
the judging subunit is configured to judge whether the regional power grid has a new energy peak regulation gap: when a gap exists, adjusting the new energy access capacity to the new energy consumption capacity of the regional power grid;
and the subarea access subunit is used for decomposing the new energy access capacity to each subarea power grid of the regional power grid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810090132.6A CN108390415B (en) | 2018-01-30 | 2018-01-30 | Method and system for calculating new energy consumption capacity of regional power grid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810090132.6A CN108390415B (en) | 2018-01-30 | 2018-01-30 | Method and system for calculating new energy consumption capacity of regional power grid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108390415A CN108390415A (en) | 2018-08-10 |
| CN108390415B true CN108390415B (en) | 2022-11-25 |
Family
ID=63074835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810090132.6A Active CN108390415B (en) | 2018-01-30 | 2018-01-30 | Method and system for calculating new energy consumption capacity of regional power grid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108390415B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110119995B (en) * | 2019-05-31 | 2022-09-02 | 国电南瑞科技股份有限公司 | New energy consumption method and system considering peak regulation and section dual constraints |
| CN110311389A (en) * | 2019-06-13 | 2019-10-08 | 国电南瑞科技股份有限公司 | Cascade hydropower joint frequency modulation peak regulating method and system suitable for new energy consumption |
| CN110401220B (en) * | 2019-07-26 | 2020-11-17 | 国网经济技术研究院有限公司 | Large-scale new energy consumption level assessment method and system |
| CN111211577B (en) * | 2019-11-22 | 2022-04-05 | 国网河南省电力公司电力科学研究院 | Method for improving operation reliability of new energy in regional power grid subareas |
| CN114050588B (en) * | 2021-11-12 | 2023-11-10 | 许继集团有限公司 | Power system adjustable reserve capacity calculation method taking new energy as main body |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102427244A (en) * | 2011-10-10 | 2012-04-25 | 国电南瑞科技股份有限公司 | Large-scale photovoltaic wind power information accessing system |
| CN104156887A (en) * | 2014-08-14 | 2014-11-19 | 国家电网公司 | Area new energy development scale and layout analysis method based on power grid constraint |
| CN104167767A (en) * | 2014-08-25 | 2014-11-26 | 国家电网公司 | Method for making wind power plant generation plan |
| CN104182808A (en) * | 2014-08-25 | 2014-12-03 | 国家电网公司 | New energy plant station power generation schedule making method based on equal-proportion power generation limitation |
| CN105226701A (en) * | 2015-07-28 | 2016-01-06 | 国家电网公司 | Based on the analytical method of the wind-powered electricity generation power consumption of peak regulation constraint |
| CN105703395A (en) * | 2016-03-15 | 2016-06-22 | 国家电网公司 | Wind power consumption ability analysis method |
-
2018
- 2018-01-30 CN CN201810090132.6A patent/CN108390415B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102427244A (en) * | 2011-10-10 | 2012-04-25 | 国电南瑞科技股份有限公司 | Large-scale photovoltaic wind power information accessing system |
| CN104156887A (en) * | 2014-08-14 | 2014-11-19 | 国家电网公司 | Area new energy development scale and layout analysis method based on power grid constraint |
| CN104167767A (en) * | 2014-08-25 | 2014-11-26 | 国家电网公司 | Method for making wind power plant generation plan |
| CN104182808A (en) * | 2014-08-25 | 2014-12-03 | 国家电网公司 | New energy plant station power generation schedule making method based on equal-proportion power generation limitation |
| CN105226701A (en) * | 2015-07-28 | 2016-01-06 | 国家电网公司 | Based on the analytical method of the wind-powered electricity generation power consumption of peak regulation constraint |
| CN105703395A (en) * | 2016-03-15 | 2016-06-22 | 国家电网公司 | Wind power consumption ability analysis method |
Non-Patent Citations (1)
| Title |
|---|
| 考虑调峰和电网输送约束的省级系统风电消纳能力分析;刘德伟等;《电力系统自动化》;20111125;第35卷(第22期);第77-81页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108390415A (en) | 2018-08-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108390415B (en) | Method and system for calculating new energy consumption capacity of regional power grid | |
| CN102780219B (en) | Method for discriminating wind power digestion capability from multiple dimensions based on wind power operation simulation | |
| CN104268800B (en) | Wind-electricity integration peak regulation balance decision method based on scene library | |
| JP2016077138A (en) | Method for configuring power distribution system | |
| CN104821581B (en) | A kind of determination method of optimal spare capacity a few days ago | |
| Liang et al. | Inertia pricing in stochastic electricity markets | |
| Gu et al. | Zonal inertia constrained generator dispatch considering load frequency relief | |
| CN105139147A (en) | Economic scheduling method for micro-grid system | |
| Li et al. | Investment optimization of grid-scale energy storage for supporting different wind power utilization levels | |
| CN106096751A (en) | Consider that new forms of energy access and participate in Short Term Generation Schedules arrangement and standby Optimal Configuration Method with Demand Side Response | |
| CN110752598B (en) | Method and device for evaluating flexibility of multipoint distributed energy storage system | |
| CN114529100A (en) | Energy storage optimal configuration method and system for wind and light absorption of regional power grid | |
| Al Kez et al. | Manipulation of static and dynamic data center power responses to support grid operations | |
| CN110580538A (en) | method and device for predicting standby demand of power system | |
| CN116111597A (en) | Method, system, memory and equipment for constructing tidal current section scene set of medium-long term scheduling plan | |
| Stanojevic et al. | Influence of battery energy storage system on generation adequacy and system stability in hybrid micro grids | |
| Tan et al. | Synergistic balancing control for low-inertia power systems with high PV penetration: Tibet as a case study | |
| CN117526282A (en) | Source-load coordination optimization method for power system and related system | |
| CN113364029B (en) | Microgrid dynamic partitioning method and system, storage medium and computing equipment | |
| CN114764652A (en) | Multi-cycle coordination power balance system and method considering medium-term and long-term scheduling | |
| CN109274112B (en) | Energy storage power station scheduling method considering regional stability | |
| Ullmark | Optimization modeling of frequency reserves and inertia in the transition to a climate-neutral electricity system | |
| Meissner et al. | Curtailment of renewable electricity as a flexibility option | |
| Shaw et al. | The impact of residential batteries on pv self-consumption and pv exports: early results from the nextgen trial in the act, australia | |
| Ding et al. | Assessment of the Value of Frequency Response Times in Power Systems |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |