CN113346625A - Distributed photovoltaic grid-connected power distribution network electric energy quality comprehensive monitoring and scheduling system - Google Patents
Distributed photovoltaic grid-connected power distribution network electric energy quality comprehensive monitoring and scheduling system Download PDFInfo
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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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
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
- Y04S10/123—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving renewable energy sources
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Supply And Distribution Of Alternating Current (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention relates to a distributed photovoltaic grid-connected power distribution network electric energy quality comprehensive monitoring and scheduling system, which comprises a plurality of grid-connected branch lines, wherein a plurality of distributed photovoltaic grid-connected ends and a plurality of user ends are arranged under each grid-connected branch line; the invention can also provide the implementation of electric energy allocation by monitoring the electric energy quality of the grid-connected branch line and monitoring the electric energy consumption of the user side under the grid-connected branch line.
Description
Technical Field
The invention relates to the technical field of distributed photovoltaic grid-connected monitoring, in particular to a distributed photovoltaic grid-connected power distribution network electric energy quality comprehensive monitoring and scheduling system.
Background
The distributed photovoltaic power generation is particularly characterized in that the distributed photovoltaic power generation facility is built near a user site, the operation mode is characterized in that the user side automatically uses the power, the surplus electric quantity is on the internet, and the balance adjustment is carried out on a power distribution system. In the tradition, to the monitoring of the electric energy quality of electric wire netting generally all adopt to install the electric energy monitor on all equipment of transmission of electricity distribution and gather the electric quantity, then calculate the aassessment according to the electric quantity of gathering, obtain the electric energy quality of transmission of electricity distribution, this kind of mode need install a large amount of electric energy monitors, and its monitoring cost is very high.
In addition, the traditional electric energy monitoring only monitors the power distribution networks in a certain transmission network, the power distribution networks are mutually connected, the electric energy quality and the use condition in a certain power distribution network are known, and the electric energy scheduling between the power distribution networks can be carried out, but the existing technical scheme is not applied to the aspect.
Disclosure of Invention
The invention aims to provide a distributed photovoltaic grid-connected power distribution network electric energy quality comprehensive monitoring and scheduling system to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the distributed photovoltaic grid-connected power distribution network electric energy quality comprehensive monitoring and scheduling system comprises
A plurality of grid-connected branch lines, each grid-connected branch line is provided with a plurality of distributed photovoltaic grid-connected terminals and a plurality of user terminals,
grid-connected equipment is arranged at each distributed photovoltaic grid-connected end,
the power distribution device is arranged at the end of each grid-connected branch line and is used for the connection and the electric energy transmission between the grid-connected branch lines,
the dispatching platform is respectively connected with the grid-connected equipment, the user terminal and the power distribution device,
the scheduling platform comprises an acquisition module, a configuration module, a scheduling module and a quality monitoring module;
the acquisition module is used for acquiring the grid-connected electric quantity and the load electric quantity of each grid-connected branch line in real time;
the configuration module sets the output end of each grid-connected branch line grid-connected device into one or more grid-connected sets, and sets the input end of each grid-connected branch line user end into one or more load sets;
the dispatching module is used for respectively distributing, stopping and dispatching or enabling the load set under the grid-connected branch line to be connected into other grid-connected branch lines for the load set under any one grid-connected branch line in the plurality of grid-connected branch lines; and
for a grid-connected set under any one of a plurality of grid-connected branch lines, the scheduling module is used for respectively carrying out unified planning on the grid-connected set and providing the uniformly planned grid-connected set for the scheduling module; and
for a load set under any one grid-connected branch line in the plurality of grid-connected branch lines, the scheduling module is used for respectively calculating the input total amount of the load set and providing the input total amount to the scheduling module, so that the scheduling module completes electric energy scheduling among the plurality of grid-connected branch lines according to the input total amount;
the quality monitoring module is used for comparing the input total amount of the load set under any one grid-connected branch line in a plurality of grid-connected branch lines, taking the grid-connected set under the grid-connected branch line and the power grid normal output of the grid-connected branch line as the upper limit of the input total amount of the load set under the grid-connected branch line, cutting off the connection between the grid-connected branch line and other grid-connected branch lines by controlling a power distribution device, and judging the influence level of the input total amount required by the load set under the grid-connected branch line on the power grid normal output of the grid-connected branch line so as to obtain the grid-connected quality of the grid-connected set under the grid-connected branch line.
Furthermore, the dispatching platform is further provided with a selection module, wherein the selection module is used for comparing the input total amount of the load set under any one grid-connected branch line in the plurality of grid-connected branch lines, and the grid-connected set under the grid-connected branch line and the grid normal output of the grid-connected branch line are used as the upper limit of the input total amount of the load set under the grid-connected branch line;
and setting the dispatching priority of the load set under each grid-connected branch line in the plurality of grid-connected branch lines, and when the input total amount of the load set under the plurality of grid-connected branch lines exceeds the upper limit, dispatching according to the priority sequence.
Further, the collecting module is used for collecting the grid-connected electric quantity and the load electric quantity of each grid-connected branch line in real time, and comprises:
the grid-connected power supply system comprises a grid-connected branch line, a first monitoring module and a second monitoring module, wherein the grid-connected equipment is provided with the first monitoring module, each user side is provided with the second monitoring module, the grid-connected electric quantity of each grid-connected branch line is the sum of monitoring data of all the first monitoring modules within a period T, and the load electric quantity is the sum of monitoring data of all the second monitoring modules within the period T of all the user sides of each grid-connected branch line.
Further, the grid-connected set is a combination of a plurality of adjacent grid-connected devices under each grid-connected branch line.
Further, the load set is a combination of a plurality of adjacent customer premises under each grid-connected branch line.
Compared with the prior art, the invention has the beneficial effects that:
the user side is self-using and has great influence on the external environment due to the fact that surplus electric quantity is on the internet, for example, photovoltaic power generation is greatly influenced by weather and seasons, and therefore instability exists. The influence level of the input total quantity required by the load set under the grid-connected branch line on the normal output of the power grid of the grid-connected branch line is judged in the same period and is compared with the reference data, so that the grid-connected quality of the grid-connected set under the grid-connected branch line is obtained.
The invention can also provide the implementation of electric energy allocation by monitoring the electric energy quality of the grid-connected branch line and monitoring the electric energy consumption of the user side under the grid-connected branch line.
Drawings
FIG. 1 is a general diagram of the framework of the present invention;
FIG. 2 is a schematic diagram of a framework of a scheduling platform according to the present invention;
fig. 3 is a schematic diagram of electric energy scheduling between the grid-connected branch lines in the present invention.
Detailed Description
The present invention will be described in detail with reference to specific embodiments. Refer to fig. 1 to 3.
In the present invention, in the case of the present invention,
the grid-connected set is a combination of a plurality of adjacent grid-connected devices under each grid-connected branch line, and the combination can be carried out through numbering.
The load set is a combination of a plurality of adjacent user terminals under each grid-connected branch line, and the combination can be carried out through numbering.
Example 1
The present embodiment describes the power monitoring in detail.
Because in distribution network, there is consumption in the electric energy, consequently the quality of monitoring the electric energy through the unable accurate arrival of data of monitoring equipment that is incorporated into the power networks, the independent installation electric energy monitor cost in the relevant node of each distribution network is very high, consequently this application adopts following mode to monitor the electric energy quality.
Because the grid-connected equipment is provided with the acquisition unit, and the user side is also provided with the acquisition unit, the scheme can be used for monitoring the electric energy on the basis of not adding any equipment.
The distributed photovoltaic grid-connected power distribution network electric energy quality comprehensive monitoring and scheduling system comprises
A plurality of grid-connected branch lines, each grid-connected branch line is provided with a plurality of distributed photovoltaic grid-connected terminals and a plurality of user terminals,
grid-connected equipment is arranged at each distributed photovoltaic grid-connected end,
the power distribution device is arranged at the end of each grid-connected branch line and is used for the connection and the electric energy transmission between the grid-connected branch lines,
the dispatching platform is respectively connected with the grid-connected equipment, the user terminal and the power distribution device,
the scheduling platform comprises an acquisition module, a configuration module, a scheduling module and a quality monitoring module;
the acquisition module is used for acquiring the grid-connected electric quantity and the load electric quantity of each grid-connected branch line in real time; specifically, the method comprises the steps that a first monitoring module (such as the acquisition unit of the grid-connected equipment, specifically an ammeter) is arranged on each grid-connected equipment, and a second monitoring module (such as the acquisition unit of the grid-connected equipment, specifically the ammeter) is arranged at each user side, the grid-connected electric quantity of each grid-connected branch line is the sum of the monitoring data of all the first monitoring modules within a period T, and the load electric quantity is the sum of the monitoring data of the second monitoring modules within the period T of all the user sides of each grid-connected branch line.
The configuration module sets the output end of each grid-connected branch line grid-connected device into one or more grid-connected sets, and sets the input end of each grid-connected branch line user end into one or more load sets;
the dispatching module is used for respectively distributing, stopping and dispatching or enabling the load set under the grid-connected branch line to be connected into other grid-connected branch lines for the load set under any one grid-connected branch line in the plurality of grid-connected branch lines; and
for a grid-connected set under any one of a plurality of grid-connected branch lines, the scheduling module is used for respectively carrying out unified planning on the grid-connected set and providing the uniformly planned grid-connected set for the scheduling module; and
for a load set under any one grid-connected branch line in the plurality of grid-connected branch lines, the scheduling module is used for respectively calculating the input total amount of the load set and providing the input total amount to the scheduling module, so that the scheduling module completes electric energy scheduling among the plurality of grid-connected branch lines according to the input total amount;
the quality monitoring module is used for comparing the input total amount of the load set under any one grid-connected branch line in a plurality of grid-connected branch lines, taking the grid-connected set under the grid-connected branch line and the power grid normal output of the grid-connected branch line as the upper limit of the input total amount of the load set under the grid-connected branch line, cutting off the connection between the grid-connected branch line and other grid-connected branch lines by controlling a power distribution device, and judging the influence level of the input total amount required by the load set under the grid-connected branch line on the power grid normal output of the grid-connected branch line so as to obtain the grid-connected quality of the grid-connected set under the grid-connected branch line.
The basic principle of the scheme is as follows: when no grid-connected equipment is connected with the power transmission network, the electric energy transmission on each grid-connected branch line is relatively stable, the basic electricity consumption of the user side under each grid-connected branch line is also in a relatively stable interval in the same period, so that the influence level of the total transmission quantity required by all the user sides on the normal output of the grid-connected branch line in the period can be obtained to form reference data,
the user side is voluntarily used by oneself, surplus electric quantity is on the net it receives the influence of external environment very big, for example photovoltaic power generation, receives weather, the influence of season very big, consequently exists unstablely. The influence level of the input total quantity required by the load set under the grid-connected branch line on the normal output of the power grid of the grid-connected branch line is judged in the same period and is compared with the reference data, so that the grid-connected quality of the grid-connected set under the grid-connected branch line is obtained.
Example 2
The present embodiment is a description of completing power scheduling between a plurality of grid-connected branch lines.
The distributed photovoltaic grid-connected power distribution network electric energy quality comprehensive monitoring and scheduling system comprises
A plurality of grid-connected branch lines, each grid-connected branch line is provided with a plurality of distributed photovoltaic grid-connected terminals and a plurality of user terminals,
grid-connected equipment is arranged at each distributed photovoltaic grid-connected end,
the power distribution device is arranged at the end of each grid-connected branch line and is used for the connection and the electric energy transmission between the grid-connected branch lines,
the dispatching platform is respectively connected with the grid-connected equipment, the user terminal and the power distribution device,
the scheduling platform comprises an acquisition module, a configuration module, a scheduling module and a quality monitoring module;
the acquisition module is used for acquiring the grid-connected electric quantity and the load electric quantity of each grid-connected branch line in real time, and specifically comprises the following steps: the grid-connected power supply system comprises a grid-connected branch line, a first monitoring module and a second monitoring module, wherein the grid-connected equipment is provided with the first monitoring module, each user side is provided with the second monitoring module, the grid-connected electric quantity of each grid-connected branch line is the sum of monitoring data of all the first monitoring modules within a period T, and the load electric quantity is the sum of monitoring data of all the second monitoring modules within the period T of all the user sides of each grid-connected branch line.
The configuration module sets the output end of each grid-connected branch line grid-connected device into one or more grid-connected sets, and sets the input end of each grid-connected branch line user end into one or more load sets;
the dispatching module is used for respectively distributing, stopping and dispatching or enabling the load set under the grid-connected branch line to be connected into other grid-connected branch lines for the load set under any one grid-connected branch line in the plurality of grid-connected branch lines; and
for a grid-connected set under any one of a plurality of grid-connected branch lines, the scheduling module is used for respectively carrying out unified planning on the grid-connected set and providing the uniformly planned grid-connected set for the scheduling module; and
for a load set under any one grid-connected branch line in the plurality of grid-connected branch lines, the scheduling module is used for respectively calculating the input total amount of the load set and providing the input total amount to the scheduling module, so that the scheduling module completes electric energy scheduling among the plurality of grid-connected branch lines according to the input total amount;
during scheduling, the scheduling platform is further provided with a selection module, the selection module is used for comparing the input total amount of the load set under any one grid-connected branch line in the plurality of grid-connected branch lines, and the grid-connected set under the grid-connected branch line and the power grid normal output of the grid-connected branch line are used as the upper limit of the input total amount of the load set under the grid-connected branch line;
the scheduling priority of the load set under each of the plurality of grid-connected branch lines is set, referring to fig. 3, in fig. 3, the priority of the first grid-connected branch line is 5, the priority of the second grid-connected branch line is 4, the priority of the third grid-connected branch line is 3, the priority of the fourth grid-connected branch line is 2, the priority of the fifth grid-connected branch line is 1, the higher the priority is, the scheduling priority is indicated, in the above, when the total input amount of the load set of only one grid-connected branch line exceeds the upper limit, scheduling of other grid-tied branch lines connected by the power distribution apparatus may be approached, for example when the aggregate amount of the input of the load set of the first grid-tied branch line exceeds an upper limit, the power dispatching can be carried out on the second grid-connected branch line connected with the power dispatching device so as to meet the power consumption requirement of the power dispatching device. When the total input amount of the load sets of at least two grid-connected branch lines exceeds the upper limit, the electric energy needs to be scheduled according to the set priority, for example, when the total input amount of the load sets of the first grid-connected branch line and the third grid-connected branch line exceeds the upper limit, at this time, the other second grid-connected branch line, the fourth grid-connected branch line and the fifth grid-connected branch line preferentially transmit the electric energy to the first grid-connected branch line through the power distribution device, and the third grid-connected branch line is not scheduled until the electric energy usage of the first grid-connected branch line reaches the stable interval. The method is used for preferentially ensuring the user terminals in important areas during the peak of power utilization.
In the above, the scheduling is to schedule the grid-connected electric energy, and the grid of the grid-connected branch line is not normally output, so as to ensure that the load set under each grid-connected branch line does not have power shortage in the same period.
Example 3
The embodiment is a description of completing power scheduling of a user terminal between grid-connected branch lines.
The distributed photovoltaic grid-connected power distribution network electric energy quality comprehensive monitoring and scheduling system comprises
A plurality of grid-connected branch lines, each grid-connected branch line is provided with a plurality of distributed photovoltaic grid-connected terminals and a plurality of user terminals,
grid-connected equipment is arranged at each distributed photovoltaic grid-connected end,
the power distribution device is arranged at the end of each grid-connected branch line and is used for the connection and the electric energy transmission between the grid-connected branch lines,
the dispatching platform is respectively connected with the grid-connected equipment, the user terminal and the power distribution device,
the scheduling platform comprises an acquisition module, a configuration module, a scheduling module and a quality monitoring module;
the acquisition module is used for acquiring the grid-connected electric quantity and the load electric quantity of each grid-connected branch line in real time, and specifically comprises the following steps: the grid-connected power supply system comprises a grid-connected branch line, a first monitoring module and a second monitoring module, wherein the grid-connected equipment is provided with the first monitoring module, each user side is provided with the second monitoring module, the grid-connected electric quantity of each grid-connected branch line is the sum of monitoring data of all the first monitoring modules within a period T, and the load electric quantity is the sum of monitoring data of all the second monitoring modules within the period T of all the user sides of each grid-connected branch line.
The configuration module sets the output end of each grid-connected branch line grid-connected device into one or more grid-connected sets, and sets the input end of each grid-connected branch line user end into one or more load sets;
the dispatching module is used for respectively distributing, stopping and dispatching or enabling the load set under the grid-connected branch line to be connected into other grid-connected branch lines for the load set under any one grid-connected branch line in the plurality of grid-connected branch lines; and
for a grid-connected set under any one of a plurality of grid-connected branch lines, the scheduling module is used for respectively carrying out unified planning on the grid-connected set and providing the uniformly planned grid-connected set for the scheduling module; and
for a load set under any one grid-connected branch line in the plurality of grid-connected branch lines, the scheduling module is used for respectively calculating the input total amount of the load set and providing the input total amount to the scheduling module, so that the scheduling module completes electric energy scheduling among the plurality of grid-connected branch lines according to the input total amount;
during scheduling, the scheduling platform is further provided with a selection module, the selection module is used for comparing the input total amount of each load set in the same grid-connected branch line, and the grid-connected set under the grid-connected branch line and the normal power grid output of the grid-connected branch line are used as the upper limit of the input total amount of the load set under the grid-connected branch line;
setting the scheduling priority of the load sets in the grid-connected branch line, referring to fig. 3, fig. 3 exemplarily depicts a first load set, a second load set, a third load set, a fourth load set and a fifth load set in the first grid-connected branch line, the priority of the first load set is 5, the priority of the second load set is 4, the priority of the third load set is 3, the priority of the fourth load set is 2, the priority of the fifth load set is 1, the higher the priority is, the scheduling priority is indicated, in the above, when the total input amount of one load set of the first parallel branch line exceeds the upper limit, the load set may be scheduled preferentially, for example, when the total input amount of the first load set in the first parallel branch line exceeds the upper limit, the first load set may be scheduled with power to meet the power consumption requirement. When the total input amount of at least the load set in the first branch line exceeds the upper limit, the electric energy needs to be scheduled according to the set priority, for example, when the total input amounts of the first load set and the third load set in the first branch line exceed the upper limit, the electric energy guarantee of the first load set is satisfied first, and the electric energy guarantee of the third load set is satisfied.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (5)
1. The comprehensive monitoring and scheduling system for the power quality of the distributed photovoltaic grid-connected power distribution network is characterized by comprising
A plurality of grid-connected branch lines, each grid-connected branch line is provided with a plurality of distributed photovoltaic grid-connected terminals and a plurality of user terminals,
grid-connected equipment is arranged at each distributed photovoltaic grid-connected end,
the power distribution device is arranged at the end of each grid-connected branch line and is used for the connection and the electric energy transmission between the grid-connected branch lines,
the dispatching platform is respectively connected with the grid-connected equipment, the user terminal and the power distribution device,
the scheduling platform comprises an acquisition module, a configuration module, a scheduling module and a quality monitoring module;
the acquisition module is used for acquiring the grid-connected electric quantity and the load electric quantity of each grid-connected branch line in real time;
the configuration module sets the output end of each grid-connected branch line grid-connected device into one or more grid-connected sets, and sets the input end of each grid-connected branch line user end into one or more load sets;
the dispatching module is used for respectively distributing, stopping and dispatching or enabling the load set under the grid-connected branch line to be connected into other grid-connected branch lines for the load set under any one grid-connected branch line in the plurality of grid-connected branch lines; and
for a grid-connected set under any one of a plurality of grid-connected branch lines, the scheduling module is used for respectively carrying out unified planning on the grid-connected set and providing the uniformly planned grid-connected set for the scheduling module; and
for a load set under any one grid-connected branch line in the plurality of grid-connected branch lines, the scheduling module is used for respectively calculating the input total amount of the load set and providing the input total amount to the scheduling module, so that the scheduling module completes electric energy scheduling among the plurality of grid-connected branch lines according to the input total amount;
the quality monitoring module is used for comparing the input total amount of the load set under any one grid-connected branch line in a plurality of grid-connected branch lines, taking the grid-connected set under the grid-connected branch line and the power grid normal output of the grid-connected branch line as the upper limit of the input total amount of the load set under the grid-connected branch line, cutting off the connection between the grid-connected branch line and other grid-connected branch lines by controlling a power distribution device, and judging the influence level of the input total amount required by the load set under the grid-connected branch line on the power grid normal output of the grid-connected branch line so as to obtain the grid-connected quality of the grid-connected set under the grid-connected branch line.
2. The system according to claim 1, wherein the scheduling platform is further provided with a selection module, the selection module is used for comparing the input total amount of the load set under any one of the grid-connected branch lines in the plurality of grid-connected branch lines, and the grid-connected set under the grid-connected branch line and the grid normal output of the grid-connected branch line are used as the upper limit of the input total amount of the load set under the grid-connected branch line;
and setting the dispatching priority of the load set under each grid-connected branch line in the plurality of grid-connected branch lines, and when the input total amount of the load set under the plurality of grid-connected branch lines exceeds the upper limit, dispatching according to the priority sequence.
3. The system for comprehensively monitoring and scheduling the power quality of the power distribution network of the distributed photovoltaic grid connection according to claim 1, wherein the acquisition module is used for acquiring the grid connection electric quantity and the load electric quantity of each grid connection branch line in real time and comprises:
the grid-connected power supply system comprises a grid-connected branch line, a first monitoring module and a second monitoring module, wherein the grid-connected equipment is provided with the first monitoring module, each user side is provided with the second monitoring module, the grid-connected electric quantity of each grid-connected branch line is the sum of monitoring data of all the first monitoring modules within a period T, and the load electric quantity is the sum of monitoring data of all the second monitoring modules within the period T of all the user sides of each grid-connected branch line.
4. The comprehensive monitoring and scheduling system for the power quality of the power distribution network of the distributed photovoltaic grid-connection of claim 1, wherein the grid-connection set is a combination of a plurality of adjacent grid-connection devices under each branch line of the grid-connection.
5. The system according to claim 1, wherein the load set is a combination of a plurality of adjacent clients under each branch line of the grid-connected system.
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