CN111224398A - Loss reduction planning method and device for power distribution network with distributed power supply - Google Patents
Loss reduction planning method and device for power distribution network with distributed power supply Download PDFInfo
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- CN111224398A CN111224398A CN202010096770.6A CN202010096770A CN111224398A CN 111224398 A CN111224398 A CN 111224398A CN 202010096770 A CN202010096770 A CN 202010096770A CN 111224398 A CN111224398 A CN 111224398A
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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
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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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
- 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
Abstract
The invention provides a loss reduction planning method and device for a power distribution network with distributed power supplies, which are used for acquiring a topological structure and real-time operation data of the power distribution network with the distributed power supplies; inputting real-time operation data into a pre-constructed power distribution network line loss calculation model for solving to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities; the optimal access position and the optimal access capacity of the distributed power supply are determined based on the line loss of the power distribution network under different distributed power supply access positions and access capacities, the power distribution network line loss calculation model is constructed based on the topological structure of the power distribution network, the obtained result is high in accuracy, four topological structures are considered, the method is not limited to the power distribution network loss reduction planning of a single topological structure, and the application range is wide; the invention simultaneously considers the influence of different equipment in the power distribution network on the line loss of the power distribution network, aims at minimizing the total cost of the equipment, realizes the low-cost installation of the device and reduces the total loss of the power distribution network.
Description
Technical Field
The invention relates to the technical field of power distribution network planning, in particular to a loss reduction planning method and device for a power distribution network with distributed power supplies.
Background
The new energy power generation and grid connection technology develops rapidly, and the new energy power generation capacity and the ratio are increased. However, the output power of distributed power sources such as photovoltaic power, wind power and the like has obvious intermittence, randomness and fluctuation, the uncertainty of the operation of the power distribution network is greatly increased after the distributed power sources are connected to the power grid, various operation indexes are affected, and in order to promote the development and the perfection of the power distribution network, the construction of the power distribution network containing the distributed power sources must be reasonably and effectively planned.
In the prior art, a power distribution network loss reduction planning model considering active power network loss is generally constructed firstly, an intelligent optimization algorithm is adopted to solve the power distribution network loss planning model, the problems of optimal site selection and volume fixing of a distributed power supply are solved, the optimization accuracy of the access position and the capacity of the distributed power supply depends on the solution calculation of the intelligent algorithm on the optimization model, the solution result has large error and low accuracy, and only planning and optimizing an active or reactive single power distribution network operation scene is large in limitation.
Disclosure of Invention
In order to overcome the defects of low accuracy and large limitation in the prior art, the invention provides a loss reduction planning method and device for a power distribution network with distributed power supplies, which are used for acquiring the topological structure and real-time operation data of the power distribution network with the distributed power supplies; inputting the real-time operation data into a pre-constructed power distribution network line loss calculation model for solving to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities; the optimal access position and the optimal access capacity of the distributed power supply are determined based on the line loss of the power distribution network under different distributed power supply access positions and access capacities, the power distribution network line loss calculation model is constructed based on the topological structure of the power distribution network, and the obtained optimal access position and optimal access capacity of the distributed power supply are high in accuracy and wide in application range.
In order to achieve the purpose of the invention, the invention adopts the following technical scheme:
on one hand, the invention provides a loss reduction planning method for a power distribution network containing a distributed power supply, which comprises the following steps:
acquiring a topological structure and real-time operation data of a power distribution network containing a distributed power supply;
inputting the real-time operation data into a pre-constructed power distribution network line loss calculation model for solving to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities;
determining an optimal access position and an optimal access capacity of the distributed power supply based on line loss of the power distribution network under different distributed power supply access positions and access capacities;
the power distribution network line loss calculation model is constructed based on a topological structure of a power distribution network.
The power distribution network line loss calculation model is constructed based on a topology structure of a power distribution network, and the method comprises the following steps:
respectively constructing a power distribution network line loss calculation model only containing the distributed power supply, a power distribution network line loss calculation model containing the distributed power supply and a reactive power compensation device, a power distribution network line loss calculation model containing the distributed power supply and an on-load voltage regulator and a power distribution network line loss calculation model containing the distributed power supply, the reactive power compensation device and the on-load voltage regulator according to the access position and the capacity of the distributed power supply in the power distribution network topological structure and the influence of voltage reactive power adjustment on line loss.
The power distribution network line loss calculation model only comprising the distributed power supply comprises the following calculation formula:
in the formula (I), the compound is shown in the specification,
is the line loss of a power distribution network only containing distributed power supplies connected in parallel between a head end node m and a tail end node n, wherein m is the head end node, n is all tail end nodes directly connected with the head end node, and P ismActive power, Q, for head end node mmReactive power, U, for head end node mmIs the voltage amplitude of the head end node m,
the active power of the distributed power supply on line mn between the head end node m and the tail end node n,
for reactive power output, R, of distributed power supply on line mnmnIs the unit resistance, X, of the line mnmnIs the unit reactance of the line mn, j is the imaginary potential, GmnLine length, L, from head end node m to distributed power access locationmnIs the length of the line mn.
The power distribution network line loss calculation model comprising the distributed power supply and the reactive compensation device comprises the following calculation formula:
in the formula (I), the compound is shown in the specification,
for a distributed power supply comprising a first node m connected in parallel between a first end node n and a second end node nThe line loss of the power distribution network of the reactive power compensation device,
for reactive compensation of reactive compensation means on the line mn, CmnThe length of the line from the head end node m to the reactive power compensation device access position.
The power distribution network line loss calculation model comprising the distributed power supply and the load voltage regulator comprises the following calculation formula:
in the formula (I), the compound is shown in the specification,
is a line loss, V, of a power distribution network comprising a distributed power supply and an on-load voltage regulator connected in parallel between a head end node m and a tail end node nmnThe length of the line from the head end node m to the on-load voltage regulator access position,
the voltage regulating value of the loaded voltage regulator.
The power distribution network line loss calculation model comprising the distributed power supply, the reactive compensation device and the on-load voltage regulator comprises the following calculation formula:
in the formula (I), the compound is shown in the specification,
is the line loss, V, of a power distribution network comprising a distributed power supply, a reactive power compensation device and an on-load voltage regulator which are connected in parallel between a head end node m and a tail end node nmnThe length of the line from the head end node m to the on-load voltage regulator access position,
is the voltage regulating value of the loaded voltage regulator,
for reactive compensation of reactive compensation means on the line mn, CmnThe length of the line from the head end node m to the reactive power compensation device access position.
The method for inputting the real-time operation data into a pre-constructed power distribution network line loss calculation model for solving to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities comprises the following steps:
and solving a power distribution network line loss calculation model by adopting a forward-backward substitution method to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities and the line loss of the power distribution network under different reactive power compensation device access positions and compensation capacities.
The method for inputting the real-time operation data into a pre-constructed power distribution network line loss calculation model for solving to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities comprises the following steps:
and solving a power distribution network line loss calculation model by adopting a forward-backward substitution method to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities and the line loss of the power distribution network under different on-load voltage regulators.
The method for inputting the real-time operation data into a pre-constructed power distribution network line loss calculation model for solving to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities comprises the following steps:
and solving a power distribution network line loss calculation model by adopting a forward-backward substitution method to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities, the line loss of the power distribution network under different reactive compensation device access positions and compensation capacities and the line loss of the power distribution network under different on-load voltage regulators access positions and adjustment quantities.
The method for determining the optimal access position and the optimal access capacity of the distributed power supply based on the line loss of the power distribution network under different distributed power supply access positions and access capacities comprises the following steps:
and obtaining the optimal access position and the optimal access capacity of the distributed power supply based on the line loss of the power distribution network under different distributed power supply access positions and access capacities and with the lowest distributed power supply configuration cost as a target.
The method for determining the optimal access position and the optimal access capacity of the distributed power supply based on the line loss of the power distribution network under different distributed power supply access positions and access capacities comprises the following steps:
based on the line loss of the power distribution network under the access positions and access capacities of different distributed power supplies and the line loss of the power distribution network under the access positions and compensation capacities of different reactive power compensation devices, the optimal access position and optimal access capacity of the distributed power supplies and the optimal access position and optimal compensation capacity of the reactive power compensation devices are obtained by taking the lowest total cost of the distributed power supplies and the reactive power compensation devices as a target.
The method for determining the optimal access position and the optimal access capacity of the distributed power supply based on the line loss of the power distribution network under different distributed power supply access positions and access capacities comprises the following steps:
based on the line loss of the power distribution network under the condition of different access positions and access capacities of the distributed power supplies and the line loss of the power distribution network under the condition of different access positions and adjustment amounts of the on-load voltage regulators, the optimal access position and optimal access capacity of the distributed power supplies and the optimal access position and optimal adjustment amount of the on-load voltage regulators are obtained by taking the lowest total cost of the distributed power supplies and the on-load voltage regulators as a target.
The method for determining the optimal access position and the optimal access capacity of the distributed power supply based on the line loss of the power distribution network under different distributed power supply access positions and access capacities comprises the following steps:
based on the line loss of the power distribution network under the access positions and access capacities of different distributed power supplies, the line loss of the power distribution network under the access positions and compensation capacities of different reactive power compensation devices and the line loss of the power distribution network under the access positions and adjustment amounts of different on-load voltage regulators, the optimal access position and optimal access capacity of the distributed power supplies, the optimal access position and optimal compensation capacity of the reactive power compensation devices and the optimal access position and optimal adjustment amount of the on-load voltage regulators are obtained by taking the lowest total cost of the distributed power supplies, the reactive power compensation devices and the on-load voltage regulators.
On the other hand, the invention also provides a loss reduction planning device for a power distribution network containing the distributed power supply, which comprises the following components:
the acquisition module is used for acquiring a topological structure and real-time operation data of a power distribution network containing a distributed power supply;
the solving module is used for inputting the real-time operation data into a pre-constructed power distribution network line loss calculation model for solving to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities;
and the determining module is used for determining the optimal access position and the optimal access capacity of the distributed power supply based on the line loss of the power distribution network under different distributed power supply access positions and access capacities.
The power distribution network line loss calculation model is constructed based on a topological structure of a power distribution network.
Compared with the closest prior art, the technical scheme provided by the invention has the following beneficial effects:
according to the loss reduction planning method for the power distribution network with the distributed power supply, the topological structure and the real-time operation data of the power distribution network with the distributed power supply are obtained; inputting the real-time operation data into a pre-constructed power distribution network line loss calculation model for solving to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities; the optimal access position and the optimal access capacity of the distributed power supply are determined based on the line loss of the power distribution network under different distributed power supply access positions and access capacities, the power distribution network line loss calculation model is constructed based on the topological structure of the power distribution network, and the obtained optimal access position and the optimal access capacity of the distributed power supply are high in accuracy and wide in application range;
according to the method, different power distribution network line loss calculation models are constructed according to different power distribution network topological structures, and a foundation is laid for accurate determination of the power distribution network line loss after the distributed power supply, the reactive compensation device and the on-load voltage regulator are connected;
the invention considers four kinds of topological structures of the power distribution network, is not limited to the loss reduction planning of the power distribution network with a single topological structure, and has no limitation;
the invention simultaneously considers the influence of different equipment in the power distribution network on the line loss of the power distribution network, aims at minimizing the total cost of the equipment, realizes the low-cost installation of the device and reduces the total loss of the power distribution network.
Drawings
Fig. 1 is a flow chart of a loss reduction planning method for a power distribution network including distributed power sources according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a topology structure of a power distribution network in an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1
The embodiment 1 of the invention provides a loss reduction planning method for a power distribution network with a distributed power supply, and the specific flow chart is shown in fig. 1, and the specific process is as follows:
s101: acquiring a topological structure and real-time operation data (the real-time operation data comprises a load, active power of the distributed power supply, reactive compensation quantity of a reactive compensation device and voltage regulation quantity of an on-load voltage regulator) of a power distribution network containing the distributed power supply;
s102: inputting real-time operation data into a pre-constructed power distribution network line loss calculation model for solving to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities;
s103: and determining the optimal access position and the optimal access capacity of the distributed power supply based on the line loss of the power distribution network under different distributed power supply access positions and access capacities.
The power distribution network line loss calculation model is constructed based on a topological structure of a power distribution network.
The power distribution network line loss calculation model is constructed based on a topology structure of a power distribution network, and the method comprises the following steps:
respectively constructing a power distribution network line loss calculation model only containing the distributed power supply, a power distribution network line loss calculation model containing the distributed power supply and a reactive power compensation device, a power distribution network line loss calculation model containing the distributed power supply and an on-load voltage regulator and a power distribution network line loss calculation model containing the distributed power supply, the reactive power compensation device and the on-load voltage regulator according to the access position and the capacity of the distributed power supply in the power distribution network topological structure and the influence of voltage reactive power adjustment on line loss.
The line loss calculation model of the power distribution network only containing the distributed power supply comprises the following calculation formula:
in the formula (I), the compound is shown in the specification,
is the line loss of a power distribution network only containing distributed power supplies connected in parallel between a head end node m and a tail end node n, wherein m is the head end node, n is all tail end nodes directly connected with the head end node, and P ismActive power, Q, for head end node mmReactive power, U, for head end node mmIs the voltage amplitude of the head end node m,
the active power of the distributed power supply on line mn between the head end node m and the tail end node n,
for reactive power output, R, of distributed power supply on line mnmnIs the unit resistance, X, of the line mnmnIs the unit reactance of the line mn, j is the imaginary potential, GmnLine length, L, from head end node m to distributed power access locationmnIs the length of the line mn.
The power distribution network line loss calculation model comprising the distributed power supply and the reactive compensation device comprises the following calculation formula:
in the formula (I), the compound is shown in the specification,
in order to realize the line loss of the power distribution network with the distributed power supply and the reactive power compensation device which are connected in parallel between the head end node m and the tail end node n,
for reactive compensation of reactive compensation means on the line mn, CmnThe length of the line from the head end node m to the reactive power compensation device access position.
The power distribution network line loss calculation model comprising the distributed power supply and the load voltage regulator comprises the following calculation formula:
in the formula (I), the compound is shown in the specification,
is a line loss, V, of a power distribution network comprising a distributed power supply and an on-load voltage regulator connected in parallel between a head end node m and a tail end node nmnThe length of the line from the head end node m to the on-load voltage regulator access position,
the voltage regulating value of the loaded voltage regulator.
As shown in fig. 2, the distribution network includes a distributed power supply DG connected in parallel between a head end node m and a tail end node n, a reactive compensation device SVC, and an on-load voltage regulator, and the distribution network line loss calculation model including the distributed power supply, the reactive compensation device, and the on-load voltage regulator includes the following calculation formulas:
in the formula (I), the compound is shown in the specification,
is the line loss, V, of a power distribution network comprising a distributed power supply, a reactive power compensation device and an on-load voltage regulator which are connected in parallel between a head end node m and a tail end node nmnThe length of the line from the head end node m to the on-load voltage regulator access position,
is the voltage regulating value of the loaded voltage regulator,
for reactive compensation of reactive compensation means on the line mn, CmnThe length of the line from the head end node m to the reactive power compensation device access position.
Inputting the real-time operation data into a pre-constructed power distribution network line loss calculation model for solving to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities, and the method comprises the following steps:
and solving a power distribution network line loss calculation model by adopting a forward-backward substitution method to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities and the line loss of the power distribution network under different reactive power compensation device access positions and compensation capacities.
Inputting the real-time operation data into a pre-constructed power distribution network line loss calculation model for solving to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities, and the method comprises the following steps:
and solving the power distribution network line loss calculation model by a forward-push back substitution method to obtain the line loss of the power distribution network under the access positions and access capacities of different distributed power supplies and the line loss of the power distribution network under the access positions and adjustment quantities of different on-load voltage regulators.
Inputting the real-time operation data into a pre-constructed power distribution network line loss calculation model for solving to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities, and the method comprises the following steps:
and solving a power distribution network line loss calculation model by adopting a forward-backward substitution method to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities, the line loss of the power distribution network under different reactive compensation device access positions and compensation capacities and the line loss of the power distribution network under different on-load voltage regulators access positions and adjustment quantities.
Determining the optimal access position and the optimal access capacity of the distributed power supply based on the line loss of the power distribution network under different distributed power supply access positions and access capacities, wherein the method comprises the following steps:
and obtaining the optimal access position and the optimal access capacity of the distributed power supply based on the line loss of the power distribution network under different distributed power supply access positions and access capacities and with the lowest distributed power supply configuration cost as a target.
Determining the optimal access position and the optimal access capacity of the distributed power supply based on the line loss of the power distribution network under different distributed power supply access positions and access capacities, wherein the method comprises the following steps:
based on the line loss of the power distribution network under the access positions and access capacities of different distributed power supplies and the line loss of the power distribution network under the access positions and compensation capacities of different reactive power compensation devices, the optimal access position and optimal access capacity of the distributed power supplies and the optimal access position and optimal compensation capacity of the reactive power compensation devices are obtained by taking the lowest total cost of the distributed power supplies and the reactive power compensation devices as a target.
Determining the optimal access position and the optimal access capacity of the distributed power supply based on the line loss of the power distribution network under different distributed power supply access positions and access capacities, wherein the method comprises the following steps:
based on the line loss of the power distribution network under the condition of different access positions and access capacities of the distributed power supplies and the line loss of the power distribution network under the condition of different access positions and adjustment amounts of the on-load voltage regulators, the optimal access position and optimal access capacity of the distributed power supplies and the optimal access position and optimal adjustment amount of the on-load voltage regulators are obtained by taking the lowest total cost of the distributed power supplies and the on-load voltage regulators as a target.
Determining the optimal access position and the optimal access capacity of the distributed power supply based on the line loss of the power distribution network under different distributed power supply access positions and access capacities, wherein the method comprises the following steps:
based on the line loss of the power distribution network under the access positions and access capacities of different distributed power supplies, the line loss of the power distribution network under the access positions and compensation capacities of different reactive power compensation devices and the line loss of the power distribution network under the access positions and adjustment amounts of different on-load voltage regulators, the optimal access position and optimal access capacity of the distributed power supplies, the optimal access position and optimal compensation capacity of the reactive power compensation devices and the optimal access position and optimal adjustment amount of the on-load voltage regulators are obtained by taking the lowest total cost of the distributed power supplies, the reactive power compensation devices and the on-load voltage regulators.
Example 2
Based on the same inventive concept, embodiment 2 of the present invention further provides a distribution network loss reduction planning apparatus including a distributed power source, and the following describes the functions of each component in detail:
the acquisition module is used for acquiring a topological structure and real-time operation data of a power distribution network containing a distributed power supply;
the solving module is used for inputting the real-time operation data into a pre-constructed power distribution network line loss calculation model for solving to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities;
and the determining module is used for determining the optimal access position and the optimal access capacity of the distributed power supply based on the line loss of the power distribution network under different distributed power supply access positions and access capacities.
The power distribution network line loss calculation model is constructed based on a topological structure of a power distribution network.
The device provided by the embodiment 2 of the invention also comprises a modeling module;
the modeling module is used for respectively constructing a power distribution network line loss calculation model only containing the distributed power supply, a power distribution network line loss calculation model containing the distributed power supply and a reactive power compensation device, a power distribution network line loss calculation model containing the distributed power supply and an on-load voltage regulator and a power distribution network line loss calculation model containing the distributed power supply, the reactive power compensation device and the on-load voltage regulator according to the access position and the capacity of the distributed power supply in the power distribution network topological structure and the influence of voltage reactive power adjustment on line loss.
The power distribution network only comprises distributed power supplies connected in parallel between the head end node and the tail end node, and the modeling module constructs a power distribution network line loss calculation model only comprising the distributed power supplies according to the following formula:
in the formula (I), the compound is shown in the specification,
is the line loss of a power distribution network only containing distributed power supplies connected in parallel between a head end node m and a tail end node n, wherein m is the head end node, n is all tail end nodes directly connected with the head end node, and P ismActive power, Q, for head end node mmReactive power, U, for head end node mmIs the voltage amplitude of the head end node m,
the active power of the distributed power supply on line mn between the head end node m and the tail end node n,
for reactive power output, R, of distributed power supply on line mnmnIs the unit resistance, X, of the line mnmnIs the unit reactance of the line mn, j is the imaginary potential, GmnLine length, L, from head end node m to distributed power access locationmnIs the length of the line mn.
The power distribution network comprises a distributed power supply and a reactive power compensation device which are connected between a head end node and a tail end node in parallel, and a modeling module constructs a power distribution network line loss calculation model comprising the distributed power supply and the reactive power compensation device according to the following formula:
in the formula (I), the compound is shown in the specification,
in order to realize the line loss of the power distribution network with the distributed power supply and the reactive power compensation device which are connected in parallel between the head end node m and the tail end node n,
for reactive compensation of reactive compensation means on the line mn, CmnThe length of the line from the head end node m to the reactive power compensation device access position.
The power distribution network comprises a distributed power supply and an on-load voltage regulator which are connected in parallel between a head end node and a tail end node, and the modeling module constructs a power distribution network line loss calculation model comprising the distributed power supply and the on-load voltage regulator according to the following formula:
in the formula (I), the compound is shown in the specification,
is a line loss, V, of a power distribution network comprising a distributed power supply and an on-load voltage regulator connected in parallel between a head end node m and a tail end node nmnThe length of the line from the head end node m to the on-load voltage regulator access position,
the voltage regulating value of the loaded voltage regulator.
The power distribution network comprises a distributed power supply, a reactive power compensation device and an on-load voltage regulator which are connected in parallel between a head end node and a tail end node, and a modeling module constructs a line loss calculation model of the distributed power supply, the reactive power compensation device and the on-load voltage regulator power distribution network according to the following formula:
in the formula (I), the compound is shown in the specification,
is the line loss, V, of a power distribution network comprising a distributed power supply, a reactive power compensation device and an on-load voltage regulator which are connected in parallel between a head end node m and a tail end node nmnThe length of the line from the head end node m to the on-load voltage regulator access position,
is the voltage regulating value of the loaded voltage regulator,
for reactive compensation of reactive compensation means on the line mn, CmnThe length of the line from the head end node m to the reactive power compensation device access position.
The solving module is specifically configured to:
and solving a power distribution network line loss calculation model by adopting a forward-backward substitution method to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities and the line loss of the power distribution network under different reactive power compensation device access positions and compensation capacities.
The solving module is specifically configured to:
and solving a power distribution network line loss calculation model by adopting a forward-backward substitution method to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities and the line loss of the power distribution network under different on-load voltage regulators.
The solving module is specifically configured to:
and solving a power distribution network line loss calculation model by adopting a forward-backward substitution method to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities, the line loss of the power distribution network under different reactive compensation device access positions and compensation capacities and the line loss of the power distribution network under different on-load voltage regulators access positions and adjustment quantities.
The determination module is specifically configured to:
and obtaining the optimal access position and the optimal access capacity of the distributed power supply based on the line loss of the power distribution network under different distributed power supply access positions and access capacities and with the lowest distributed power supply configuration cost as a target.
The determination module is specifically configured to:
based on the line loss of the power distribution network under the access positions and access capacities of different distributed power supplies and the line loss of the power distribution network under the access positions and compensation capacities of different reactive power compensation devices, the optimal access position and optimal access capacity of the distributed power supplies and the optimal access position and optimal compensation capacity of the reactive power compensation devices are obtained by taking the lowest total cost of the distributed power supplies and the reactive power compensation devices as a target.
The determination module is specifically configured to:
based on the line loss of the power distribution network under the condition of different access positions and access capacities of the distributed power supplies and the line loss of the power distribution network under the condition of different access positions and adjustment amounts of the on-load voltage regulators, the optimal access position and optimal access capacity of the distributed power supplies and the optimal access position and optimal adjustment amount of the on-load voltage regulators are obtained by taking the lowest total cost of the distributed power supplies and the on-load voltage regulators as a target.
The determination module is specifically configured to:
based on the line loss of the power distribution network under the access positions and access capacities of different distributed power supplies, the line loss of the power distribution network under the access positions and compensation capacities of different reactive power compensation devices and the line loss of the power distribution network under the access positions and adjustment amounts of different on-load voltage regulators, the optimal access position and optimal access capacity of the distributed power supplies, the optimal access position and optimal compensation capacity of the reactive power compensation devices and the optimal access position and optimal adjustment amount of the on-load voltage regulators are obtained by taking the lowest total cost of the distributed power supplies, the reactive power compensation devices and the on-load voltage regulators.
For convenience of description, each part of the above-described apparatus is separately described as being functionally divided into various modules or units. Of course, the functionality of the various modules or units may be implemented in the same one or more pieces of software or hardware when implementing the present application.
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 the like) 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 flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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.
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 (14)
1. A loss reduction planning method for a power distribution network with distributed power supplies is characterized by comprising the following steps:
acquiring a topological structure and real-time operation data of a power distribution network containing a distributed power supply;
inputting the real-time operation data into a pre-constructed power distribution network line loss calculation model for solving to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities;
determining an optimal access position and an optimal access capacity of the distributed power supply based on line loss of the power distribution network under different distributed power supply access positions and access capacities;
the power distribution network line loss calculation model is constructed based on a topological structure of a power distribution network.
2. The loss reduction planning method for the power distribution network with the distributed power supplies according to claim 1, wherein the power distribution network line loss calculation model is constructed based on a topological structure of the power distribution network, and comprises the following steps:
respectively constructing a power distribution network line loss calculation model only containing the distributed power supply, a power distribution network line loss calculation model containing the distributed power supply and a reactive power compensation device, a power distribution network line loss calculation model containing the distributed power supply and an on-load voltage regulator and a power distribution network line loss calculation model containing the distributed power supply, the reactive power compensation device and the on-load voltage regulator according to the access position and the capacity of the distributed power supply in the power distribution network topological structure and the influence of voltage reactive power adjustment on line loss.
3. The loss reduction planning method for the power distribution network with the distributed power supplies according to claim 2, wherein the calculation model for the line loss of the power distribution network with only the distributed power supplies comprises the following calculation formula:
in the formula (I), the compound is shown in the specification,
is the line loss of a power distribution network only containing distributed power supplies connected in parallel between a head end node m and a tail end node n, wherein m is the head end node, n is all tail end nodes directly connected with the head end node, and P ismActive power, Q, for head end node mmReactive power, U, for head end node mmIs the voltage amplitude of the head end node m,
the active power of the distributed power supply on line mn between the head end node m and the tail end node n,
for reactive power output, R, of distributed power supply on line mnmnIs the unit resistance, X, of the line mnmnIs the unit reactance of the line mn, j is the imaginary potential, GmnIs a headLine length, L, from end node m to distributed power access locationmnIs the length of the line mn.
4. The loss reduction planning method for the power distribution network with the distributed power supplies according to claim 3, wherein the line loss calculation model for the power distribution network with the distributed power supplies and the reactive power compensation devices comprises the following calculation formula:
in the formula (I), the compound is shown in the specification,
in order to realize the line loss of the power distribution network with the distributed power supply and the reactive power compensation device which are connected in parallel between the head end node m and the tail end node n,
for reactive compensation of reactive compensation means on the line mn, CmnThe length of the line from the head end node m to the reactive power compensation device access position.
5. The loss reduction planning method for the power distribution network with the distributed power supplies according to claim 3, wherein the line loss calculation model for the power distribution network with the distributed power supplies and the load voltage regulators comprises the following calculation formula:
in the formula (I), the compound is shown in the specification,
is a line loss, V, of a power distribution network comprising a distributed power supply and an on-load voltage regulator connected in parallel between a head end node m and a tail end node nmnThe length of the line from the head end node m to the on-load voltage regulator access position,
the voltage regulating value of the loaded voltage regulator.
6. The loss reduction planning method for the power distribution network with the distributed power supplies according to claim 3, wherein the line loss calculation model for the power distribution network with the distributed power supplies, the reactive power compensation device and the load voltage regulator comprises the following calculation formula:
in the formula (I), the compound is shown in the specification,
is the line loss, V, of a power distribution network comprising a distributed power supply, a reactive power compensation device and an on-load voltage regulator which are connected in parallel between a head end node m and a tail end node nmnThe length of the line from the head end node m to the on-load voltage regulator access position,
is the voltage regulating value of the loaded voltage regulator,
for reactive compensation of reactive compensation means on the line mn, CmnThe length of the line from the head end node m to the reactive power compensation device access position.
7. The loss reduction planning method for the power distribution network with the distributed power supplies according to claim 4, wherein the step of inputting the real-time operation data into a pre-constructed power distribution network line loss calculation model for solving to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities comprises the steps of:
and solving a power distribution network line loss calculation model by adopting a forward-backward substitution method to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities and the line loss of the power distribution network under different reactive power compensation device access positions and compensation capacities.
8. The loss reduction planning method for the power distribution network with the distributed power supplies according to claim 5, wherein the step of inputting the real-time operation data into a pre-constructed power distribution network line loss calculation model for solving to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities comprises the steps of:
and solving a power distribution network line loss calculation model by adopting a forward-backward substitution method to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities and the line loss of the power distribution network under different on-load voltage regulators.
9. The loss reduction planning method for the power distribution network with the distributed power supplies according to claim 6, wherein the step of inputting the real-time operation data into a pre-constructed power distribution network line loss calculation model for solving to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities comprises the steps of:
and solving a power distribution network line loss calculation model by adopting a forward-backward substitution method to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities, the line loss of the power distribution network under different reactive compensation device access positions and compensation capacities and the line loss of the power distribution network under different on-load voltage regulators access positions and adjustment quantities.
10. The loss reduction planning method for the power distribution network with the distributed power supplies according to claim 1, wherein the determining of the optimal access position and the optimal access capacity of the distributed power supplies based on the line loss of the power distribution network at different access positions and access capacities of the distributed power supplies comprises:
and obtaining the optimal access position and the optimal access capacity of the distributed power supply based on the line loss of the power distribution network under different distributed power supply access positions and access capacities and with the lowest distributed power supply configuration cost as a target.
11. The loss reduction planning method for the power distribution network with the distributed power supplies according to claim 7, wherein the determining of the optimal access position and the optimal access capacity of the distributed power supplies based on the line loss of the power distribution network at different access positions and access capacities of the distributed power supplies comprises:
based on the line loss of the power distribution network under the access positions and access capacities of different distributed power supplies and the line loss of the power distribution network under the access positions and compensation capacities of different reactive power compensation devices, the optimal access position and optimal access capacity of the distributed power supplies and the optimal access position and optimal compensation capacity of the reactive power compensation devices are obtained by taking the lowest total cost of the distributed power supplies and the reactive power compensation devices as a target.
12. The loss reduction planning method for the power distribution network with the distributed power supplies according to claim 8, wherein the determining of the optimal access position and the optimal access capacity of the distributed power supplies based on the line loss of the power distribution network at different access positions and access capacities of the distributed power supplies comprises:
based on the line loss of the power distribution network under the condition of different access positions and access capacities of the distributed power supplies and the line loss of the power distribution network under the condition of different access positions and adjustment amounts of the on-load voltage regulators, the optimal access position and optimal access capacity of the distributed power supplies and the optimal access position and optimal adjustment amount of the on-load voltage regulators are obtained by taking the lowest total cost of the distributed power supplies and the on-load voltage regulators as a target.
13. The loss reduction planning method for the power distribution network with the distributed power supplies according to claim 9, wherein the determining of the optimal access position and the optimal access capacity of the distributed power supplies based on the line loss of the power distribution network at different access positions and access capacities of the distributed power supplies comprises:
based on the line loss of the power distribution network under the access positions and access capacities of different distributed power supplies, the line loss of the power distribution network under the access positions and compensation capacities of different reactive power compensation devices and the line loss of the power distribution network under the access positions and adjustment amounts of different on-load voltage regulators, the optimal access position and optimal access capacity of the distributed power supplies, the optimal access position and optimal compensation capacity of the reactive power compensation devices and the optimal access position and optimal adjustment amount of the on-load voltage regulators are obtained by taking the lowest total cost of the distributed power supplies, the reactive power compensation devices and the on-load voltage regulators.
14. The utility model provides a distribution network that contains distributed generator reduces and decreases planning device which characterized in that includes:
the acquisition module is used for acquiring a topological structure and real-time operation data of a power distribution network containing a distributed power supply;
the solving module is used for inputting the real-time operation data into a pre-constructed power distribution network line loss calculation model for solving to obtain the line loss of the power distribution network under different distributed power supply access positions and access capacities;
the determining module is used for determining the optimal access position and the optimal access capacity of the distributed power supply based on the line loss of the power distribution network under different distributed power supply access positions and access capacities;
the power distribution network line loss calculation model is constructed based on a topological structure of a power distribution network.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111668881A (en) * | 2020-06-19 | 2020-09-15 | 国网冀北电力有限公司 | Evaluation method considering influence of new energy output on line loss of power grid |
| CN114188998A (en) * | 2022-02-17 | 2022-03-15 | 国能日新科技股份有限公司 | New energy station line loss adaptive compensation method and system considering acquisition time delay |
| CN116384212A (en) * | 2022-12-16 | 2023-07-04 | 国网江苏省电力有限公司电力科学研究院 | Collaborative loss reduction method for DG-containing area, computer equipment and storage medium |
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2020
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111668881A (en) * | 2020-06-19 | 2020-09-15 | 国网冀北电力有限公司 | Evaluation method considering influence of new energy output on line loss of power grid |
| CN114188998A (en) * | 2022-02-17 | 2022-03-15 | 国能日新科技股份有限公司 | New energy station line loss adaptive compensation method and system considering acquisition time delay |
| CN116384212A (en) * | 2022-12-16 | 2023-07-04 | 国网江苏省电力有限公司电力科学研究院 | Collaborative loss reduction method for DG-containing area, computer equipment and storage medium |
| CN116384212B (en) * | 2022-12-16 | 2023-12-05 | 国网江苏省电力有限公司电力科学研究院 | Collaborative loss reduction method for DG-containing area, computer equipment and storage medium |
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