CN105514985B - Method for constructing power grid aggregation model - Google Patents

Method for constructing power grid aggregation model Download PDF

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CN105514985B
CN105514985B CN201510891856.7A CN201510891856A CN105514985B CN 105514985 B CN105514985 B CN 105514985B CN 201510891856 A CN201510891856 A CN 201510891856A CN 105514985 B CN105514985 B CN 105514985B
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power grid
power
aggregation
model
photovoltaic
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CN105514985A (en
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黄越辉
礼晓飞
刘纯
范高锋
王跃峰
刘德伟
高云峰
许晓艳
马烁
张楠
许彦平
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State Grid Corp of China SGCC
China Electric Power Research Institute Co Ltd CEPRI
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China Electric Power Research Institute Co Ltd CEPRI
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/30—Circuit design
    • G06F30/36—Circuit design at the analogue level
    • G06F30/367—Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods
    • 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]
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation

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Abstract

The invention provides a method for constructing a power grid aggregation model, which comprises the following steps of: partitioning the power grid; and carrying out load model aggregation, interconnection line model aggregation and power supply model aggregation in each power grid area. According to the power grid aggregation model construction method, after a power grid is divided into a plurality of power grid areas, load model aggregation, interconnection line model aggregation and power supply model aggregation are carried out in different power grid areas, so that the target power grid is simplified; the complexity of the power grid is greatly reduced on the basis of keeping the operation characteristics of the original power grid; the calculation speed can be obviously improved in the calculation of the new energy consumption capability.

Description

Method for constructing power grid aggregation model
Technical Field
The invention belongs to the technical field of new energy power generation, and particularly relates to a method for constructing a power grid aggregation model.
Background
As mankind entered the 21 st century, a new energy revolution is underway silently. According to the needs of sustainable development of economic society, people are urgently called to establish an energy structure mainly based on clean and renewable energy sources to gradually replace an energy structure mainly based on fossil energy sources with serious pollution and limited resources. The new energy power generation technology comprises a solar photovoltaic power generation technology, a solar thermal power generation technology, a wind power generation technology, a biomass power generation technology, a geothermal power generation technology, a tidal power generation technology, a fuel cell power generation technology, a wind power generation technology and the like, and fully shows the technological progress achievements of new energy power generation in recent years.
In recent years, new energy resources such as wind power and photovoltaic power in China are rapidly developed, and the installed capacity of wind power in China is 1 hundred million kilowatts and the installed capacity of photovoltaic power exceeds 3500 million kilowatts in 2015 in the first half of the year. While new energy is rapidly developed, the contradiction of new energy consumption is increasingly prominent, and the problem of electricity limitation of new energy in individual regions becomes a main reason for restricting the development of new energy.
The calculation of the new energy consumption capability is an effective support for new energy planning and scheduling operation, but the actual power grid operation is influenced by various boundary conditions, and the power grid operation can be changed in various ways every day and every moment. Therefore, it is desirable to provide a method that can simplify the calculation of the power grid while maintaining the original power grid operation characteristics.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a method for constructing a power grid aggregation model, which greatly reduces the complexity of a power grid and can effectively improve the calculation speed of new energy consumption capability.
In order to achieve the purpose of the invention, the invention adopts the following technical scheme:
the invention provides a method for constructing a power grid aggregation model, which comprises the following steps:
step 1: partitioning the power grid;
step 2: and carrying out load model aggregation, interconnection line model aggregation and power supply model aggregation in each power grid area.
In the step 1, the power grid is partitioned according to the condition that the new energy is blocked to be sent out, and different power grid areas are obtained.
In the step 1, a new energy delivery blocked section is obtained according to a power grid operation mode, and each new energy delivery blocked area is used as an independent power grid area; and after determining all new energy blocked areas, using the rest power grid as a power grid area.
The new energy delivery blocked sections among different power grid areas are aggregated into one section, and the section limit is the sum of the original section limits among different power grid areas.
The step 2 comprises the following steps:
step 2-1: carrying out load model aggregation in the power grid region;
step 2-2: carrying out junctor model aggregation in the power grid area;
step 2-3: and carrying out power model aggregation in the power grid region.
In the step 2-1, the load model aggregation in the power grid region includes:
various loads in the power grid area are aggregated into a load curve, and the load curve is the sum of all loads in the power grid area.
In step 2-2, performing tie line model aggregation in the power grid region includes:
the inter-provincial junctor in the power grid region is aggregated into one junctor, the upper limit of the transmission capacity of the junctor is the upper limit integrated value of the transmission capacity of each junctor, the lower limit of the transmission capacity of the junctor is the lower limit integrated value of the transmission capacity of each junctor, and the transmission electric quantity of the junctor obtained after aggregation is the integrated value of the transmission electric quantity of each junctor.
In step 2-3, performing power model aggregation in the power grid region, including:
step 2-3-1: dividing a power supply in a power grid area into thermal power, hydropower, wind power and photovoltaic power;
step 2-3-2: respectively polymerizing thermal power and hydropower;
step 2-3-3: and respectively polymerizing the wind power and the photovoltaic.
The step 2-3-2 comprises the following steps:
(1) thermal power generating units with the same capacity and type are classified into one type, the installed capacity, the maximum output, the minimum output and the climbing rate of the same type of thermal power generating units are the same, and the name of the thermal power generating unit is represented by the thermal power generating unit type abbreviation and the thermal power generating unit capacity;
(2) the hydroelectric generating sets with the same capacity and type are classified into one type, the installed capacity, the maximum output, the minimum output, the climbing rate and the electric quantity constraint of the similar hydroelectric generating sets are the same, and the names of the hydroelectric generating sets are represented by the type abbreviation and the capacity of the hydroelectric generating sets.
The steps 2-3-3 comprise:
(1) according to the wind-electricity theoretical power P in the power grid regiontwAnd the capacity C of the wind power generator in the power grid regionwDetermining the normalized wind power output in the power grid region, including:
Figure BDA0000869668620000031
wherein, PwRepresenting wind power normalized output in a power grid area; ptw＝Pgw+Pcw，PgwRepresenting wind-generated power, P, in the grid areacwRepresenting the wind power limit power in the power grid region;
wind power normalized output P in power grid regionwAnd the capacity C of the wind power generator in the power grid regionwModel parameters of the wind power aggregation model are obtained;
(2) according to the photovoltaic theoretical power P in the power grid regiontpPhotovoltaic installed capacity C in power grid regionpDetermining the photovoltaic normalized output in the power grid region, including:
Figure BDA0000869668620000032
wherein, PpRepresenting the photovoltaic normalized output in the power grid area; ptp＝Pgp+Pcp，PgpRepresenting the photovoltaic power generation power, P, in the grid areacpRepresenting photovoltaic limited electric power in a power grid region;
photovoltaic normalized output P in power grid regionpAnd photovoltaic installation in power grid regionMachine capacity CpAs model parameters of the photovoltaic polymerization model.
Compared with the closest prior art, the technical scheme provided by the invention has the following beneficial effects:
1) according to the power grid aggregation model construction method, after a power grid is divided into a plurality of power grid areas, load model aggregation, interconnection line model aggregation and power supply model aggregation are carried out in different power grid areas, so that the target power grid is simplified;
2) the power grid aggregation model construction method provided by the invention greatly reduces the complexity of the power grid on the basis of keeping the original power grid operation characteristics;
3) the power grid polymerization model construction method provided by the invention can obviously improve the calculation speed in the calculation of the new energy consumption capability.
Drawings
FIG. 1 is a flow chart of a method for constructing a power grid aggregation model according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a power grid partition in the embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The invention provides a method for constructing a power grid aggregation model, which is characterized in that a new energy delivery blocked section is obtained through calculation according to a power grid operation mode, each new energy blocked area is used as an independent power grid partition, and other power grids outside each partition are used as power grid main partitions. On the basis of power grid partitioning, aggregation is carried out from three aspects of loads, inter-provincial junctor and power supply: in the aspect of load aggregation, the total load output in each partition is used as a load aggregation model; in the inter-provincial link aggregation, the sum of the inter-provincial link outputs in the partition is used as an inter-provincial link aggregation model. In the aspect of power supply aggregation, conventional units such as thermal power, hydropower and the like are aggregated according to capacity and unit types, and new energy such as wind power, photovoltaic and the like is aggregated according to the output characteristics and installed capacity of the wind power and photovoltaic of each partition; the method for constructing the power grid aggregation model greatly reduces the complexity of the power grid on the basis of keeping the operation characteristics of the original power grid, and can effectively improve the calculation speed of the new energy consumption capability.
The invention provides a method for constructing a power grid aggregation model, which comprises the following steps of:
step 1: partitioning the power grid;
step 2: and carrying out load model aggregation, interconnection line model aggregation and power supply model aggregation in each power grid area.
In the step 1, the power grid is partitioned according to the condition that the new energy is blocked to be sent out, and different power grid areas are obtained.
In the step 1, (as shown in fig. 2), a new energy delivery blocked section is obtained according to a power grid operation mode, and each new energy delivery blocked area is used as an independent power grid area; and after determining all new energy blocked areas, using the rest power grid as a power grid area.
The new energy delivery blocked sections among different power grid areas are aggregated into one section, and the section limit is the sum of the original section limits among different power grid areas.
The step 2 comprises the following steps:
step 2-1: carrying out load model aggregation in the power grid region;
step 2-2: carrying out junctor model aggregation in the power grid area;
step 2-3: and carrying out power model aggregation in the power grid region.
In the step 2-1, the load model aggregation in the power grid region includes:
various loads in the power grid area are aggregated into a load curve, and the load curve is the sum of all loads in the power grid area.
In step 2-2, performing tie line model aggregation in the power grid region includes:
the inter-provincial junctor in the power grid region is aggregated into one junctor, the upper limit of the transmission capacity of the junctor is the upper limit integrated value of the transmission capacity of each junctor, the lower limit of the transmission capacity of the junctor is the lower limit integrated value of the transmission capacity of each junctor, and the transmission electric quantity of the junctor obtained after aggregation is the integrated value of the transmission electric quantity of each junctor.
In step 2-3, performing power model aggregation in the power grid region, including:
step 2-3-1: dividing a power supply in a power grid area into thermal power, hydropower, wind power and photovoltaic power;
step 2-3-2: respectively polymerizing thermal power and hydropower;
step 2-3-3: and respectively polymerizing the wind power and the photovoltaic.
The step 2-3-2 comprises the following steps:
(1) thermal power generating units with the same capacity and type are classified into one type, the installed capacity, the maximum output, the minimum output and the climbing rate of the same type of thermal power generating units are the same, and the name of the thermal power generating unit is represented by the thermal power generating unit type abbreviation and the thermal power generating unit capacity; for example, the thermal power generating unit with the air extraction type and the capacity of 100MW is uniformly named as CQ 100.
(2) The hydroelectric generating sets with the same capacity and type are classified into one type, the installed capacity, the maximum output, the minimum output, the climbing rate and the electric quantity constraint of the similar hydroelectric generating sets are the same, and the names of the hydroelectric generating sets are represented by the type abbreviation and the capacity of the hydroelectric generating sets. If the hydroelectric generating set with regulating capacity (provided with a reservoir) and the capacity of 100MW exists, the hydroelectric generating set is named as SK 100.
The steps 2-3-3 comprise:
(1) according to the wind-electricity theoretical power P in the power grid regiontwAnd the capacity C of the wind power generator in the power grid regionwDetermining the normalized wind power output in the power grid region, including:
Figure BDA0000869668620000061
wherein, PwRepresenting wind power normalized output in a power grid area; ptw＝Pgw+Pcw，PgwRepresenting wind-generated power, P, in the grid areacwRepresenting the wind power limit power in the power grid region;
wind power normalized output P in power grid regionwAnd the capacity C of the wind power generator in the power grid regionwModel parameters of the wind power aggregation model are obtained;
(2) according to the photovoltaic theoretical power P in the power grid regiontpPhotovoltaic installed capacity C in power grid regionpDetermining the photovoltaic normalized output in the power grid region, including:
Figure BDA0000869668620000062
wherein, PpRepresenting the photovoltaic normalized output in the power grid area; ptp＝Pgp+Pcp，PgpRepresenting the photovoltaic power generation power, P, in the grid areacpRepresenting photovoltaic limited electric power in a power grid region;
photovoltaic normalized output P in power grid regionpAnd photovoltaic installed capacity C in power grid regionpAs model parameters of the photovoltaic polymerization model.
Finally, it should be noted that: the above embodiments are only intended to illustrate the technical solution of the present invention and not to limit the same, and a person of ordinary skill in the art can make modifications or equivalents to the specific embodiments of the present invention with reference to the above embodiments, and such modifications or equivalents without departing from the spirit and scope of the present invention are within the scope of the claims of the present invention as set forth in the claims.

Claims (7)

1. A method for constructing a power grid aggregation model is characterized by comprising the following steps: the method comprises the following steps:
step 1: partitioning the power grid;
step 2: load model aggregation, interconnection line model aggregation and power supply model aggregation are carried out in each power grid area;
the step 2 comprises the following steps:
step 2-1: carrying out load model aggregation in the power grid region;
step 2-2: carrying out junctor model aggregation in the power grid area;
step 2-3: carrying out power supply model aggregation in the power grid region;
in step 2-3, performing power model aggregation in the power grid region, including:
step 2-3-1: dividing a power supply in a power grid area into thermal power, hydropower, wind power and photovoltaic power;
step 2-3-2: respectively polymerizing thermal power and hydropower;
step 2-3-3: respectively polymerizing wind power and photovoltaic power;
the steps 2-3-3 comprise:
(1) according to the wind-electricity theoretical power P in the power grid regiontwAnd the capacity C of the wind power generator in the power grid regionwDetermining the normalized wind power output in the power grid region, including:
Figure FDA0002424559230000011
wherein, PwRepresenting wind power normalized output in a power grid area; ptw＝Pgw+Pcw，PgwRepresenting wind-generated power, P, in the grid areacwRepresenting the wind power limit power in the power grid region;
wind power normalized output P in power grid regionwAnd the capacity C of the wind power generator in the power grid regionwModel parameters of the wind power aggregation model are obtained;
(2) according to the photovoltaic theoretical power P in the power grid regiontpPhotovoltaic installed capacity C in power grid regionpDetermining the photovoltaic normalized output in the power grid region, including:
Figure FDA0002424559230000021
wherein, PpRepresenting the photovoltaic normalized output in the power grid area; ptp＝Pgp+Pcp，PgpRepresenting the photovoltaic power generation power, P, in the grid areacpRepresenting photovoltaic limited electric power in a power grid region;
photovoltaic normalized output P in power grid regionpAnd photovoltaic installed capacity C in power grid regionpAs model parameters of the photovoltaic polymerization model.
2. The method for constructing the power grid aggregation model according to claim 1, wherein: in the step 1, the power grid is partitioned according to the condition that the new energy is blocked to be sent out, and different power grid areas are obtained.
3. The method for constructing the power grid aggregation model according to claim 2, wherein: in the step 1, a new energy delivery blocked section is obtained according to a power grid operation mode, and each new energy delivery blocked area is used as an independent power grid area; and after determining all new energy blocked areas, using the rest power grid as a power grid area.
4. The method for constructing the power grid aggregation model according to claim 3, wherein: the new energy delivery blocked sections among different power grid areas are aggregated into one section, and the section limit is the sum of the original section limits among different power grid areas.
5. The method for constructing the power grid aggregation model according to claim 1, wherein: in the step 2-1, the load model aggregation in the power grid region includes:
various loads in the power grid area are aggregated into a load curve, and the load curve is the sum of all loads in the power grid area.
6. The method for constructing the power grid aggregation model according to claim 1, wherein: in step 2-2, performing tie line model aggregation in the power grid region includes:
the inter-provincial junctor in the power grid region is aggregated into one junctor, the upper limit of the transmission capacity of the junctor is the upper limit integrated value of the transmission capacity of each junctor, the lower limit of the transmission capacity of the junctor is the lower limit integrated value of the transmission capacity of each junctor, and the transmission electric quantity of the junctor obtained after aggregation is the integrated value of the transmission electric quantity of each junctor.
7. The method for constructing the power grid aggregation model according to claim 1, wherein: the step 2-3-2 comprises the following steps:
(1) thermal power generating units with the same capacity and type are classified into one type, the installed capacity, the maximum output, the minimum output and the climbing rate of the same type of thermal power generating units are the same, and the name of the thermal power generating unit is represented by the thermal power generating unit type abbreviation and the thermal power generating unit capacity;
(2) the hydroelectric generating sets with the same capacity and type are classified into one type, the installed capacity, the maximum output, the minimum output, the climbing rate and the electric quantity constraint of the similar hydroelectric generating sets are the same, and the names of the hydroelectric generating sets are represented by the type abbreviation and the capacity of the hydroelectric generating sets.
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