CN113241772A - Method and device for controlling coordination of voltage and reactive power of power grid - Google Patents
Method and device for controlling coordination of voltage and reactive power of power grid Download PDFInfo
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- CN113241772A CN113241772A CN202110604138.2A CN202110604138A CN113241772A CN 113241772 A CN113241772 A CN 113241772A CN 202110604138 A CN202110604138 A CN 202110604138A CN 113241772 A CN113241772 A CN 113241772A
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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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
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- 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
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- Y02E40/30—Reactive power compensation
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Abstract
The invention discloses a method and a device for controlling the coordination of the voltage and the reactive power of a power grid, wherein the method comprises the following steps: determining edge nodes from nodes of a bus at the low voltage 10KV side of a transformer substation or lines at the head end of a distribution network; determining a coordination variable corresponding to the edge node; the coordination variables include: edge node voltage, edge node reactive power and edge node power; when a main network AVC receives a reactive compensation demand request, determining a target compensation mode based on the reactive power of edge nodes and the power of the edge nodes; the distribution network AVC determines whether a voltage regulation request needs to be generated to the main network AVC or not based on the size of the edge node voltage; and if the main network AVC receives the voltage regulation request, the corresponding cloud end of the main network AVC inputs the voltage regulation request into the cloud end strategy calculation consideration conditions to obtain the regulation strategy. Through the reactive power coordination control system, real-time information interaction between the main network AVC and the distribution network AVC and between the distribution network AVC are realized, and therefore control of multi-level voltage reactive power coordination is realized.
Description
Technical Field
The invention relates to the technical field of power system automation, in particular to a method and a device for controlling coordination of grid voltage and reactive power.
Background
With the increasing importance of the development of the power distribution network in the countries in recent years, the project construction of the power distribution network is more and more, and the distribution network system in the power distribution room needs to face more complex power working conditions and higher operation level. Meanwhile, although some distribution transformer voltage problems on specific feeders can be solved through reactive power regulation at the present stage, the voltage reactive power regulation equipment installed in the existing distribution network is independently controlled only by the measured value of the installed point, so that the whole network coordination of all levels of voltage regulation and compensation equipment of the power grid is insufficient, and the conditions that the voltage of a superior power grid is in a qualified interval range, the regulation means of a subordinate power grid is used up and the voltage of a user is still over-limited occur.
Obviously, the voltage reactive power regulating equipment installed in the current distribution network cannot be matched with the more complex power working condition faced by the distribution network system.
Disclosure of Invention
The invention provides a method and a device for controlling voltage and reactive power coordination of a power grid, which realize real-time information interaction between a main network AVC and a distribution network AVC and between the distribution network AVC through a reactive power coordination control system, thereby realizing the control of multi-level voltage and reactive power coordination.
In a first aspect, a control method for coordinating voltage and reactive power of a power grid is applied to a reactive power coordination control system; the system comprises a main network AVC and at least two distribution network AVCs; the method comprises the following steps:
determining edge nodes from nodes of a bus at the low voltage 10KV side of a transformer substation or lines at the head end of a distribution network;
determining a coordination variable corresponding to the edge node; the coordination variables include: edge node voltage, edge node reactive power and edge node power;
when the main network AVC receives a reactive compensation demand request, determining a target compensation mode based on the reactive power of the edge node and the power of the edge node; and the number of the first and second groups,
the distribution network AVC determines whether a voltage regulation request needs to be generated to the main network AVC or not based on the size of the edge node voltage;
and if the main network AVC receives the voltage regulation request, the corresponding cloud end of the main network AVC calculates the cloud end strategy input by the voltage regulation request into consideration conditions to obtain a regulation strategy.
Optionally, after determining the coordination variable corresponding to the edge node, the method further includes:
and standardizing the interactive information between the main network AVC and the distribution network AVC.
Optionally, the interaction information includes: the AVC operation information of the distribution network; the method for determining whether the voltage regulation request needs to be generated to the main network AVC or not by the distribution network AVC based on the size of the edge node voltage comprises the following steps:
the distribution network AVC determines whether a voltage regulation requirement exists based on the edge node voltage;
under the condition that a voltage regulation requirement exists, judging whether an adjusting means exists in the area where the edge node is located; if not, generating a voltage adjustment request by combining the distribution network AVC operation information, and sending the voltage adjustment request to the main network AVC; and if so, adjusting the power supply of the edge node through the adjusting means.
Optionally, the interaction information includes: real-time voltage regulation reactive compensation capability information and a real-time coordination instruction; when the main network AVC receives an active compensation demand request, determining a target compensation mode based on the edge node reactive power and the edge node power, wherein the method comprises the following steps:
when the main network AVC receives a reactive compensation demand request, the real-time coordination instruction is sent to the distribution network AVC;
the distribution network AVC responds to the real-time coordination instruction and sends the real-time voltage regulation reactive compensation capability information to the main network AVC;
the main network AVC judges whether the request for applying compensation can be met or not based on the real-time voltage regulation reactive compensation capability information; if not, determining a sending area of the reactive compensation demand request, and enabling the AVC of the distribution network where the sending area is located to execute local compensation; and if so, performing reactive compensation through other distribution networks AVC except the distribution network AVC where the sending region is located.
In a second aspect, the invention further provides a control device for coordinating the voltage and the reactive power of the power grid, which is applied to a reactive power coordination control system; the system comprises a main network AVC and at least two distribution network AVCs; the method comprises the following steps:
determining edge nodes from nodes of a bus at the low voltage 10KV side of a transformer substation or lines at the head end of a distribution network;
determining a coordination variable corresponding to the edge node; the coordination variables include: edge node voltage, edge node reactive power and edge node power;
when the main network AVC receives a reactive compensation demand request, determining a target compensation mode based on the reactive power of the edge node and the power of the edge node; and the number of the first and second groups,
the distribution network AVC determines whether a voltage regulation request needs to be generated to the main network AVC or not based on the size of the edge node voltage;
and if the main network AVC receives the voltage regulation request, the corresponding cloud end of the main network AVC calculates the cloud end strategy input by the voltage regulation request into consideration conditions to obtain a regulation strategy.
Optionally, the apparatus further comprises:
and the interaction information specification module is used for specifying the interaction information between the main network AVC and the distribution network AVC.
Optionally, the interaction information includes: the AVC operation information of the distribution network; the request determination module 404 includes:
the adjustment requirement determining submodule is used for determining whether a voltage adjustment requirement exists or not in the distribution network AVC based on the edge node voltage;
the first judgment submodule is used for judging whether an adjusting means exists in the area where the edge node is located or not under the condition that a voltage adjusting requirement exists; if not, generating a voltage adjustment request by combining the distribution network AVC operation information, and sending the voltage adjustment request to the main network AVC; and if so, adjusting the power supply of the edge node through the adjusting means.
Optionally, the interaction information includes: real-time voltage regulation reactive compensation capability information and a real-time coordination instruction; the compensation mode determining module 403 includes:
the real-time coordination instruction sending sub-module is used for sending the real-time coordination instruction to the distribution network AVC when the main network AVC receives a reactive compensation demand request;
the response submodule is used for responding to the real-time coordination instruction through the distribution network AVC and sending the real-time voltage regulation reactive compensation capacity information to the main network AVC;
the second judgment sub-module is used for judging whether the main network AVC can meet the compensation application request or not based on the real-time voltage regulation reactive compensation capability information; if not, determining a sending area of the reactive compensation demand request, and enabling the AVC of the distribution network where the sending area is located to execute local compensation; and if so, performing reactive compensation through other distribution networks AVC except the distribution network AVC where the sending region is located.
In a third aspect, the present invention provides an electronic device comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, which when executed by the processor, implement the steps of the method according to the first aspect.
In a fourth aspect, the present invention provides a readable storage medium on which is stored a program or instructions which, when executed by a processor, performs the steps of the method according to the first aspect.
According to the technical scheme, the invention has the following advantages:
the method comprises the steps that edge nodes are determined from nodes of a bus on the low-voltage side of a transformer substation or lines at the head end of a distribution network; determining a coordination variable corresponding to the edge node; the coordination variables include: edge node voltage, edge node reactive power and edge node power; when the main network AVC receives a reactive compensation demand request, determining a target compensation mode based on the reactive power of the edge node and the power of the edge node; the distribution network AVC determines whether a voltage regulation request needs to be generated to the main network AVC or not based on the size of the edge node voltage; and if the main network AVC receives the voltage regulation request, the corresponding cloud end of the main network AVC calculates the cloud end strategy input by the voltage regulation request into consideration conditions to obtain a regulation strategy. Through the reactive power coordination control system, real-time information interaction between the main network AVC and the distribution network AVC and between the distribution network AVC are realized, and therefore control of multi-level voltage reactive power coordination is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts;
fig. 1 is a flowchart illustrating steps of a first embodiment of a method for controlling grid voltage and reactive power coordination according to the present invention;
fig. 2 is a flowchart illustrating steps of a second embodiment of a method for controlling grid voltage and reactive power coordination according to the present invention;
FIG. 3 is a schematic diagram of the reactive power coordinated control system of the present invention;
fig. 4 is a block diagram of an embodiment of a control device for coordinating grid voltage and reactive power according to the present invention.
Detailed Description
The embodiment of the invention provides a method and a device for controlling the coordination of the voltage and the reactive power of a power grid, which realize the real-time information interaction between a main network AVC and a distribution network AVC and between the distribution network AVCs through a reactive power coordination control system, thereby realizing the control of the multi-level voltage reactive power coordination.
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating a first step of a control method for coordinating grid voltage and reactive power according to a first embodiment of the present invention, and is applied to a reactive power coordination control system; the system comprises a main network AVC and at least two distribution network AVCs; the method comprises the following steps:
step S101, determining edge nodes from nodes of a bus at the low-voltage 10KV side of a transformer substation or lines at the head end of a distribution network;
step S102, determining a coordination variable corresponding to the edge node; the coordination variables include: edge node voltage, edge node reactive power and edge node power;
step S103, the distribution network AVC determines whether a voltage regulation request needs to be generated to the main network AVC or not based on the size of the edge node voltage; if the main network AVC receives the voltage adjustment request, the corresponding cloud end of the main network AVC calculates and considers the cloud end strategy input by the voltage adjustment request to obtain an adjustment strategy; and the number of the first and second groups,
and step S104, when the main network AVC receives a reactive compensation demand request, determining a target compensation mode based on the reactive power of the edge node and the power of the edge node.
In the embodiment of the invention, edge nodes are determined from nodes of a bus at the low-voltage 10KV side of a transformer substation or lines at the head end of a distribution network; determining a coordination variable corresponding to the edge node; the coordination variables include: edge node voltage, edge node reactive power and edge node power; when the main network AVC receives a reactive compensation demand request, determining a target compensation mode based on the reactive power of the edge node and the power of the edge node; the distribution network AVC determines whether a voltage regulation request needs to be generated to the main network AVC or not based on the size of the edge node voltage; and if the main network AVC receives the voltage regulation request, the corresponding cloud end of the main network AVC calculates the cloud end strategy input by the voltage regulation request into consideration conditions to obtain a regulation strategy. Through the reactive power coordination control system, real-time information interaction between the main network AVC and the distribution network AVC and between the distribution network AVC are realized, and therefore control of multi-level voltage reactive power coordination is realized.
Please refer to fig. 2, which is a flowchart illustrating steps of a second embodiment of a method for controlling coordination of grid voltage and reactive power according to the present invention, and is applied to a schematic diagram illustrating a reactive power coordination control system shown in fig. 3; the system comprises a main network AVC and at least two distribution network AVCs, wherein the main network AVC and the distribution network AVCs are used as connecting media through edge nodes; the main network AVC is used for realizing central modeling and central optimization calculation and mainly completing calculation and regulation of network level, regional level and substation strategies, and the distribution network AVC is used as an edge node and mainly solves optimization control of lines, distribution transformers, distributed energy sources and the like in the substation; the method comprises the following steps:
step S201, edge nodes are determined from nodes of a bus at the low-voltage 10KV side of a transformer substation or lines at the head end of a distribution network;
in the embodiment of the invention, the edge node can be a low-voltage 10kV side bus of a transformer substation or a distribution network head end line node.
Step S202, determining a coordination variable corresponding to the edge node; the coordination variables include: edge node voltage, edge node reactive power and edge node power;
in the embodiment of the invention, the coordination variables mainly comprise three variables of edge node voltage, edge node reactive power or edge node power factor.
Step S203, standardizing the interactive information between the main network AVC and the distribution network AVC; the interaction information comprises: the AVC operation information, the real-time voltage regulation reactive compensation capability information and the real-time coordination instruction of the distribution network are obtained;
in the embodiment of the invention, the operation information of the AVC of the main distribution network comprises the following steps: the method comprises the steps of a main distribution network AVC operation state, a main distribution network AVC target refreshing time, a main distribution network AVC local/remote signal, a main distribution network AVC closed loop/open loop signal and the like.
The real-time voltage regulation reactive compensation capability comprises: the method comprises the steps of edge node reactive power up-regulation blocking signals, edge node reactive power down-regulation blocking signals, edge node total adjustable reactive power up-regulation margins, edge node total adjustable reactive power down-regulation margins, distributed energy reactive power up-down regulation margins, up-down regulation blocking signals and the like.
The real-time coordination instruction comprises a coordination request sent by the distribution network AVC and a real-time coordination instruction sent by the main network AVC. The distribution network AVC uploading coordination request is mainly the voltage direction or range of a 10kV line side bus of a transformer substation. The real-time coordination command issued by the main network AVC mainly comprises an edge node reactive power target value (range)/an edge node voltage target value (range) and the like.
The details are shown in the following table:
step S204, when the main network AVC receives a reactive compensation demand request, the real-time coordination instruction is sent to the distribution network AVC;
step S205, the distribution network AVC responds to the real-time coordination instruction and sends the real-time voltage regulation reactive compensation capability information to the main network AVC;
step S206, the main network AVC judges whether the request for applying compensation can be met or not based on the real-time voltage regulation reactive compensation capability information; if not, determining a sending area of the reactive compensation demand request, and enabling the AVC of the distribution network where the sending area is located to execute local compensation; if so, performing reactive compensation through the AVCs of other distribution networks except the AVC of the distribution network where the sending region is located; and the number of the first and second groups,
step S207, the distribution network AVC determines whether a voltage regulation requirement exists or not based on the edge node voltage;
step S208, under the condition that a voltage regulation requirement exists, judging whether an adjusting means exists in the area where the edge node is located; if not, generating a voltage adjustment request by combining the distribution network AVC operation information, and sending the voltage adjustment request to the main network AVC; if so, adjusting the power supply of the edge node through the adjusting means;
step S209, if the main network AVC receives the voltage adjustment request, the cloud corresponding to the main network AVC calculates and considers the cloud policy input by the voltage adjustment request, so as to obtain an adjustment policy.
According to the embodiment of the invention, the voltage and reactive power coordination control of the main network and the distribution network is completed by using the coordination control mode of the AVC edge node of the distribution network and the AVC cloud of the main network, and meanwhile, the voltage quality of the distribution network is improved, so that the reactive power regulation capability of the distribution network is effectively utilized, and the voltage and reactive power regulation capability of a power grid is integrally improved.
In the embodiment of the invention, the voltage coordination control and the reactive coordination control can be completed by the reactive coordination control system under the common assistance of the main network AVC and the distribution network AVC.
The voltage coordination control specifically comprises the following steps: and judging whether the whole network and regional hub nodes have voltage regulation requirements or not through the AVC cloud of the main network, and judging whether the transformer substation has a voltage regulation request or not. And (3) the distribution network AVC calculates whether the edge node has a voltage regulation requirement in real time, and when no regulation means exists locally, the regulation request is uploaded to a main regulation AVC cloud. And responding to the voltage regulation request by the main network AVC, and adding the regulation request sent by the distribution network AVC edge node into the calculation consideration condition of the main network cloud AVC strategy by the corresponding cloud to form a regulation strategy. It should be noted that the principle of the adjustment strategy is as follows: in a single period, only a single level of adjustment is allowed in the same region, the voltage adjustment has a time sequence, and the actions of feeder lines and distribution transformer equipment are not required before the voltage adjustment of the whole network, the region and the transformer substation is completed.
In addition, the reactive power coordination control specifically comprises the following steps: the method comprises the steps that reactive power optimization is carried out on the AVC of a main network cloud in real time, if the whole network or a region has reactive power compensation requirements, the AVC cloud of the main network firstly applies compensation to edge nodes, and under the condition that the edge nodes of a lower-level power grid cannot meet the compensation requirements, control commands of local compensation are formed.
According to the control method for coordinating the voltage and the reactive power of the power grid, provided by the embodiment of the invention, edge nodes are determined from nodes of a bus at the low-voltage 10KV side of a transformer substation or a head-end line of a distribution network; determining a coordination variable corresponding to the edge node; the coordination variables include: edge node voltage, edge node reactive power and edge node power; when the main network AVC receives a reactive compensation demand request, determining a target compensation mode based on the reactive power of the edge node and the power of the edge node; the distribution network AVC determines whether a voltage regulation request needs to be generated to the main network AVC or not based on the size of the edge node voltage; and if the main network AVC receives the voltage regulation request, the corresponding cloud end of the main network AVC calculates the cloud end strategy input by the voltage regulation request into consideration conditions to obtain a regulation strategy. Through the reactive power coordination control system, real-time information interaction between the main network AVC and the distribution network AVC and between the distribution network AVC are realized, and therefore control of multi-level voltage reactive power coordination is realized.
Referring to fig. 4, a block diagram of an embodiment of a control device for coordinating grid voltage and reactive power is shown, which is applied to a reactive power coordination control system; the system comprises a main network AVC and at least two distribution network AVCs; the system comprises the following modules:
the edge node determining module 401 is configured to determine an edge node from a low-voltage 10 KV-side bus of a transformer substation or a head-end line node of a distribution network;
a coordination variable determining module 402, configured to determine a coordination variable corresponding to the edge node; the coordination variables include: edge node voltage, edge node reactive power and edge node power;
a compensation mode determining module 403, configured to determine a target compensation mode based on the edge node reactive power and the edge node power when the main network AVC receives a reactive compensation demand request; and the number of the first and second groups,
a request determining module 404, configured to determine, by the distribution network AVC, whether a request for adjusting voltage needs to be generated to the main network AVC based on the magnitude of the edge node voltage;
and an adjustment policy determination module 405, configured to, if the main network AVC receives the voltage adjustment request, obtain an adjustment policy by using a cloud policy calculation consideration condition input by the cloud corresponding to the main network AVC in the voltage adjustment request.
In an optional embodiment, the apparatus further comprises:
and the interaction information specification module is used for specifying the interaction information between the main network AVC and the distribution network AVC.
In an optional embodiment, the interaction information includes: the AVC operation information of the distribution network; the request determination module 404 includes:
the adjustment requirement determining submodule is used for determining whether a voltage adjustment requirement exists or not in the distribution network AVC based on the edge node voltage;
the first judgment submodule is used for judging whether an adjusting means exists in the area where the edge node is located or not under the condition that a voltage adjusting requirement exists; if not, generating a voltage adjustment request by combining the distribution network AVC operation information, and sending the voltage adjustment request to the main network AVC; and if so, adjusting the power supply of the edge node through the adjusting means.
In an optional embodiment, the interaction information includes: real-time voltage regulation reactive compensation capability information and a real-time coordination instruction; the compensation mode determining module 403 includes:
the real-time coordination instruction sending sub-module is used for sending the real-time coordination instruction to the distribution network AVC when the main network AVC receives a reactive compensation demand request;
the response submodule is used for responding to the real-time coordination instruction through the distribution network AVC and sending the real-time voltage regulation reactive compensation capacity information to the main network AVC;
the second judgment sub-module is used for judging whether the main network AVC can meet the compensation application request or not based on the real-time voltage regulation reactive compensation capability information; if not, determining a sending area of the reactive compensation demand request, and enabling the AVC of the distribution network where the sending area is located to execute local compensation; and if so, performing reactive compensation through other distribution networks AVC except the distribution network AVC where the sending region is located.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working process of the apparatus described above may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.
The embodiment of the present invention further provides an electronic device, which includes a memory and a processor, where the memory stores an analyzer program, and when the analyzer program is executed by the processor, the processor executes the steps of the method for controlling grid voltage and reactive power coordination according to any of the above embodiments.
The embodiment of the present invention further provides an analyzer readable storage medium, on which an analyzer program is stored, and when the analyzer program is executed by the processor, the analyzer program implements the method for controlling the grid voltage and reactive power coordination according to any of the above embodiments.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present application, it should be understood that the method, apparatus, electronic device and storage medium disclosed in the present application may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium readable by an analyzer. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a readable storage medium and includes several instructions for enabling an analyzer (which may be a personal analyzer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned readable storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A control method for coordinating the voltage and the reactive power of a power grid is characterized in that the control method is applied to a reactive power coordination control system; the system comprises a main network AVC and at least two distribution network AVCs; the method comprises the following steps:
determining edge nodes from nodes of a bus at the low voltage 10KV side of a transformer substation or lines at the head end of a distribution network;
determining a coordination variable corresponding to the edge node; the coordination variables include: edge node voltage, edge node reactive power and edge node power;
when the main network AVC receives a reactive compensation demand request, determining a target compensation mode based on the reactive power of the edge node and the power of the edge node; and the number of the first and second groups,
the distribution network AVC determines whether a voltage regulation request needs to be generated to the main network AVC or not based on the size of the edge node voltage;
and if the main network AVC receives the voltage regulation request, the corresponding cloud end of the main network AVC calculates the cloud end strategy input by the voltage regulation request into consideration conditions to obtain a regulation strategy.
2. The method for controlling grid voltage and reactive power coordination according to claim 1, wherein after determining the coordination variable corresponding to the edge node, the method further comprises:
and standardizing the interactive information between the main network AVC and the distribution network AVC.
3. The method for grid voltage and reactive power coordinated control according to claim 2, wherein the mutual information comprises: the AVC operation information of the distribution network; the method for determining whether the voltage regulation request needs to be generated to the main network AVC or not by the distribution network AVC based on the size of the edge node voltage comprises the following steps:
the distribution network AVC determines whether a voltage regulation requirement exists based on the edge node voltage;
under the condition that a voltage regulation requirement exists, judging whether an adjusting means exists in the area where the edge node is located; if not, generating a voltage adjustment request by combining the distribution network AVC operation information, and sending the voltage adjustment request to the main network AVC; and if so, adjusting the power supply of the edge node through the adjusting means.
4. The method for grid voltage and reactive power coordinated control according to claim 2, wherein the mutual information comprises: real-time voltage regulation reactive compensation capability information and a real-time coordination instruction; when the main network AVC receives an active compensation demand request, determining a target compensation mode based on the edge node reactive power and the edge node power, wherein the method comprises the following steps:
when the main network AVC receives a reactive compensation demand request, the real-time coordination instruction is sent to the distribution network AVC;
the distribution network AVC responds to the real-time coordination instruction and sends the real-time voltage regulation reactive compensation capability information to the main network AVC;
the main network AVC judges whether the request for applying compensation can be met or not based on the real-time voltage regulation reactive compensation capability information; if not, determining a sending area of the reactive compensation demand request, and enabling the AVC of the distribution network where the sending area is located to execute local compensation; and if so, performing reactive compensation through other distribution networks AVC except the distribution network AVC where the sending region is located.
5. A control device for coordinating the voltage and the reactive power of a power grid is characterized by being applied to a reactive power coordination control system; the system comprises a main network AVC and at least two distribution network AVCs; the method comprises the following steps:
determining edge nodes from nodes of a bus at the low voltage 10KV side of a transformer substation or lines at the head end of a distribution network;
determining a coordination variable corresponding to the edge node; the coordination variables include: edge node voltage, edge node reactive power and edge node power;
when the main network AVC receives a reactive compensation demand request, determining a target compensation mode based on the reactive power of the edge node and the power of the edge node; and the number of the first and second groups,
the distribution network AVC determines whether a voltage regulation request needs to be generated to the main network AVC or not based on the size of the edge node voltage;
and if the main network AVC receives the voltage regulation request, the corresponding cloud end of the main network AVC calculates the cloud end strategy input by the voltage regulation request into consideration conditions to obtain a regulation strategy.
6. The grid voltage and reactive coordination control device of claim 5, characterized in that said device further comprises:
and the interaction information specification module is used for specifying the interaction information between the main network AVC and the distribution network AVC.
7. The grid voltage and reactive power coordinated control device according to claim 6, wherein the interaction information comprises: the AVC operation information of the distribution network; the request determination module 404 includes:
the adjustment requirement determining submodule is used for determining whether a voltage adjustment requirement exists or not in the distribution network AVC based on the edge node voltage;
the first judgment submodule is used for judging whether an adjusting means exists in the area where the edge node is located or not under the condition that a voltage adjusting requirement exists; if not, generating a voltage adjustment request by combining the distribution network AVC operation information, and sending the voltage adjustment request to the main network AVC; and if so, adjusting the power supply of the edge node through the adjusting means.
8. The grid voltage and reactive power coordinated control device according to claim 6, wherein the interaction information comprises: real-time voltage regulation reactive compensation capability information and a real-time coordination instruction; the compensation mode determining module 403 includes:
the real-time coordination instruction sending sub-module is used for sending the real-time coordination instruction to the distribution network AVC when the main network AVC receives a reactive compensation demand request;
the response submodule is used for responding to the real-time coordination instruction through the distribution network AVC and sending the real-time voltage regulation reactive compensation capacity information to the main network AVC;
the second judgment sub-module is used for judging whether the main network AVC can meet the compensation application request or not based on the real-time voltage regulation reactive compensation capability information; if not, determining a sending area of the reactive compensation demand request, and enabling the AVC of the distribution network where the sending area is located to execute local compensation; and if so, performing reactive compensation through other distribution networks AVC except the distribution network AVC where the sending region is located.
9. An electronic device comprising a processor and a memory, the memory storing analysis machine readable instructions that, when executed by the processor, perform the method of any of claims 1-4.
10. A storage medium having stored thereon a parser program, characterized in that the parser program, when executed by a processor, performs the method according to any of claims 1-4.
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