CN116526587A - Photovoltaic grid-connected configuration-free system and method - Google Patents
Photovoltaic grid-connected configuration-free system and method Download PDFInfo
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- CN116526587A CN116526587A CN202310715393.3A CN202310715393A CN116526587A CN 116526587 A CN116526587 A CN 116526587A CN 202310715393 A CN202310715393 A CN 202310715393A CN 116526587 A CN116526587 A CN 116526587A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 34
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Classifications
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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
- H02J3/48—Controlling the sharing of the in-phase component
-
- 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
- H02J13/00001—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 the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
-
- 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
- H02J13/00006—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 information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00022—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 information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using wireless data transmission
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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
- H02J13/00006—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 information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00028—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 information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment involving the use of Internet protocols
-
- 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
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/03—Protecting confidentiality, e.g. by encryption
- H04W12/033—Protecting confidentiality, e.g. by encryption of the user plane, e.g. user's traffic
-
- 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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- Computer Networks & Wireless Communication (AREA)
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Abstract
The invention provides a photovoltaic grid-connected configuration-free system which is in communication connection with a power dispatching master station, wherein a photovoltaic inverter acquisition module converts telemetry data and remote signaling data of an acquired photovoltaic inverter into a unified photovoltaic acquisition protocol, and the telemetry data and the remote signaling data of the photovoltaic inverter after conversion are sent to the power dispatching master station; the power dispatching master station generates a power generation active regulation target value according to telemetry data and telemetry data of the photovoltaic inverter, and sends the generated power generation active regulation target value to the automatic power generation control module through the communication module; the automatic power generation control module is used for configuring the output active power of the photovoltaic inverters, so that the power generation active power change values of all the photovoltaic inverters reach the power generation active target value.
Description
Technical Field
The invention relates to the field of distributed photovoltaic grid-connected access, in particular to a photovoltaic grid-connected configuration-free system and method.
Background
At present, a novel power system taking new energy as a main body enters a rapid development period, and a distributed photovoltaic field station forms an important power supply support of a regional power grid, so that the influence on the safe operation of the power grid is increased increasingly. According to national standards, industry standards, grid-connected dispatching protocols and other related regulations, grid-connected stations are responsible for operation and maintenance work of a station-side power monitoring system, and relevant station operation information meeting requirements is ensured to be transmitted to a dispatching automation system of a regulation and control mechanism, so that the dispatching operation requirements of a power grid are met. However, due to the influence of factors such as natural conditions, technical economy, operation and maintenance management and the like, the data channels of part of plant stations are lost, interrupted or abnormal, the operation data in the stations required by the operation of the power grid cannot be transmitted according to regulations, the observation and control capability of power grid regulation and control personnel on the power grid are influenced, new energy consumption and power balance are not facilitated, and the safe and stable operation of the power grid is influenced when serious.
The distributed photovoltaic is developed on a large scale and is connected in a high proportion, the 'considerable, measurable, adjustable and controllable' of the distributed photovoltaic is comprehensively realized, the problems related to power grid consumption and grid connection service are solved by utilizing informatization and digitalization technologies, the prediction of power generation output, power balance and real-time scheduling are well performed, and the method is a necessary measure for ensuring the safe and stable operation of the power grid.
The current power grid cannot directly manage the photovoltaic inverter, the current power generation parameters are usually obtained by adopting a hanging ammeter, the photovoltaic inverter cannot be regulated and controlled, and the photovoltaic inverter must be directly managed to realize the functions of remote measurement, remote control and remote regulation of power grid dispatching.
At present, the current photovoltaic inverter manufacturers are numerous, protocols are not standard, the installation positions of the distributed photovoltaic inverters are dispersed and numerous, and unified access is realized, on one hand, protocol configuration is needed to be carried out in a power dispatching master station so as to identify data of the photovoltaic inverters of different manufacturers; on the other hand, the active power of a plurality of photovoltaic inverters needs to be regulated and controlled, but the active power of each photovoltaic inverter needs to be regulated and controlled is manually configured according to an empirical value, so that the distributed photovoltaic grid-connected configuration is difficult and has low efficiency.
In order to solve the problems, the invention provides a photovoltaic grid-connected configuration-free system and a photovoltaic grid-connected configuration-free method.
Disclosure of Invention
The invention aims to solve the problems in the prior art, innovatively provides a photovoltaic grid-connected configuration-free system and a photovoltaic grid-connected configuration-free method, effectively solves the problems of high difficulty and low efficiency of distributed photovoltaic grid-connected configuration caused by the prior art, effectively improves the efficiency of distributed photovoltaic grid-connected configuration, and reduces the configuration difficulty.
The first aspect of the invention provides a photovoltaic grid-connected configuration-free system which is in communication connection with a power dispatching master station, and comprises the following components: the system comprises a photovoltaic inverter acquisition module, an automatic power generation control module and a communication module, wherein the photovoltaic inverter acquisition module is used for acquiring telemetry data and remote signaling data of a photovoltaic inverter, converting the acquired telemetry data and remote signaling data of the photovoltaic inverter into a unified photovoltaic acquisition protocol, and transmitting the telemetry data and remote signaling data of the photovoltaic inverter after conversion to a power dispatching master station through the communication module; the power dispatching master station is used for receiving the telemetry data and the remote signaling data of the converted photovoltaic inverter, generating a power generation active regulation target value according to the telemetry data and the remote signaling data of the photovoltaic inverter, and sending the generated power generation active regulation target value to the automatic power generation control module through the communication module; the automatic power generation control module is used for configuring the output active power of the photovoltaic inverters so that the power generation active power change values of all the photovoltaic inverters reach the power generation active target value.
Optionally, the method further comprises: the encryption module is respectively in communication connection with the photovoltaic inverter acquisition module and the communication module and is used for receiving and encrypting the telemetry data and the remote signaling data of the converted photovoltaic inverter sent by the photovoltaic inverter acquisition module and sending the encrypted telemetry data and the remote signaling data of the converted photovoltaic inverter to the power dispatching master station through the communication module.
Optionally, the photovoltaic inverter acquisition module includes a plurality of acquisition submodules and a plurality of protocol conversion submodules, the acquisition submodules acquire model information, telemetry data and telemetry data of each photovoltaic inverter, determine manufacturer information corresponding to the photovoltaic inverters and data protocol information corresponding to the manufacturer information according to the model information, call the corresponding protocol conversion submodules according to the data protocol information of each photovoltaic inverter, and convert protocols of the telemetry data and the telemetry data into unified photovoltaic acquisition protocols.
Further, the number of the collecting submodules is consistent with that of the photovoltaic inverters, and the number of the protocol conversion submodules is consistent with that of manufacturers of the photovoltaic inverters.
Optionally, the telemetry data includes active power, reactive power, voltage, current of the photovoltaic inverter, and the telemetry data includes switch position and knife switch position.
Optionally, the power dispatching master station is configured to receive telemetry data and telemetry data of the photovoltaic inverter after protocol conversion, and generate a power generation active regulation target value according to the telemetry data and the telemetry data of the photovoltaic inverter specifically includes:
and the power dispatching master station receives the telemetry data and the remote signaling data of the converted photovoltaic inverters, determines the output active power of all the current photovoltaic inverters according to the telemetry data and the remote signaling data of the photovoltaic inverters, and generates a power generation active regulation target value according to the active power of all the current photovoltaic inverters.
Optionally, the automatic power generation control module is further in communication connection with the photovoltaic inverter acquisition module, acquires telemetry data and telemetry data of the converted photovoltaic inverters, determines the active power of each photovoltaic inverter currently according to the telemetry data and the telemetry data, configures the output active power of the photovoltaic inverters according to the power generation active regulation target value issued by the power scheduling master station and the active power of each photovoltaic inverter currently, and enables the power generation active power change values of all the photovoltaic inverters to reach the power generation active regulation target value.
Optionally, the configuring the output active power of the plurality of inverters according to the power generation active regulation target value issued by the power dispatching master station and the active power of each photovoltaic inverter at present so that the power generation reaches the power generation active target value specifically includes:
taking a photovoltaic inverter meeting preset conditions as a sample machine, and taking the active power output of the currently collected sample machine as the maximum active power output at the current moment;
determining the current increased active power output and the current decreased active power output of each photovoltaic inverter according to the maximum active power output at the current moment and the current active power output of the photovoltaic inverter;
And sequencing from large to small according to the current increased active power output and the current decreased active power output of the photovoltaic inverter, and regulating and controlling the power dispatching master station according to the sequencing of the photovoltaic inverter when the power dispatching master station sends the power generation active regulation target value until the power generation active regulation target value is reached.
Further, when the power dispatching master station sends the power generation active regulation target value, regulating and controlling are performed one by one according to the sequence of the photovoltaic inverters until the power generation active regulation target value is reached, specifically:
when the power dispatching master station sends a power generation active regulation target value, photovoltaic inverters with the front order are preferentially traversed and selected to regulate and control output active power output, so that the regulation participation of the least number of photovoltaic inverters is realized, and the power generation active regulation target value is reached.
The second aspect of the present invention provides a photovoltaic grid-connected configuration-free method, which is implemented on the basis of the photovoltaic grid-connected configuration-free system according to the first aspect of the present invention, and comprises:
the photovoltaic inverter acquisition module acquires telemetry data and remote signaling data of the photovoltaic inverter, converts the acquired telemetry data and remote signaling data of the photovoltaic inverter into a unified photovoltaic acquisition protocol, and sends the telemetry data and remote signaling data of the photovoltaic inverter after conversion to the power dispatching master station;
The power dispatching master station is used for receiving the telemetry data and the telemetry data of the converted photovoltaic inverter, generating a power generation active regulation target value according to the telemetry data and the telemetry data of the photovoltaic inverter, and sending the generated power generation active regulation target value to the automatic power generation control module through the communication module;
the automatic power generation control module is used for configuring output active power output of the photovoltaic inverters so that comprehensive power generation active power output of all the photovoltaic inverters reaches a power generation active target value.
The technical scheme adopted by the invention comprises the following technical effects:
1. the photovoltaic inverter acquisition module is used for acquiring telemetry data and remote signaling data of the photovoltaic inverter, converting the acquired telemetry data and remote signaling data of the photovoltaic inverter into a unified photovoltaic acquisition protocol, and transmitting the telemetry data and remote signaling data of the photovoltaic inverter after conversion to the power dispatching master station; the power dispatching master station is used for receiving the telemetry data and the telemetry data of the converted photovoltaic inverter, generating a power generation active regulation target value according to the telemetry data and the telemetry data of the photovoltaic inverter, and sending the generated power generation active regulation target value to the automatic power generation control module through the communication module; the automatic power generation control module is used for configuring the output active power of the photovoltaic inverters, so that the power generation active power change values of all the photovoltaic inverters reach the power generation active target value, automatic regulation control and management of each photovoltaic inverter are realized, the problems of high difficulty and low efficiency of distributed photovoltaic grid-connected configuration caused by the prior art are effectively solved, the distributed photovoltaic grid-connected configuration efficiency is effectively improved, and the configuration difficulty is reduced.
2. The system in the technical scheme of the invention further comprises: the encryption module is used for receiving and encrypting the telemetry data and the remote signaling data of the converted photovoltaic inverter, which are sent by the photovoltaic inverter acquisition module, and sending the encrypted telemetry data and the remote signaling data of the converted photovoltaic inverter to the power dispatching master station through the communication module, so that the reliability and the safety of communication between the photovoltaic inverter of the power grid and the power dispatching master station are improved.
3. The photovoltaic inverter acquisition module comprises a plurality of acquisition sub-modules and a plurality of protocol conversion sub-modules, wherein the acquisition sub-modules acquire model information of each photovoltaic inverter, determine manufacturer information corresponding to the photovoltaic inverter and data protocol information corresponding to the manufacturer information according to the model information, and call the corresponding protocol conversion sub-modules according to the data protocol information of each photovoltaic inverter so as to convert the protocol of telemetry data and remote signaling data into a unified photovoltaic acquisition protocol; and the photovoltaic access standards of different manufacturers are standardized, unified access of various photovoltaic inverters is realized, and the operation and maintenance difficulty and the operation and maintenance cost are reduced.
4. According to the technical scheme, the automatic power generation control module acquires telemetry data and remote signaling data of the converted photovoltaic inverters, active power of each photovoltaic inverter is determined according to the telemetry data and the remote signaling data, the current increasable active power output and the current decreasable active power output of the photovoltaic inverters are respectively sequenced from large to small, when a power dispatching master station sends a power generation active regulation target value, photovoltaic inverters with front sequencing are selected to be traversed preferentially to regulate and control the output active power output, and the output power target value required by a power dispatching mechanism is achieved by the least number of photovoltaic inverters to participate in regulation, the least regulation times and the fastest regulation speed, so that powerful technical support is provided for realizing 'adjustable and controllable' of a low-voltage distributed power supply.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
For a clearer description of embodiments of the invention or of the solutions of the prior art, reference will be made to the accompanying drawings, which are used in the description of the embodiments or of the prior art, and it will be obvious to those skilled in the art that other drawings can be obtained from these without inventive labour.
FIG. 1 is a schematic diagram of a system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a photovoltaic inverter acquisition module in a system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an overall flow chart executed by a system according to an embodiment of the present invention;
fig. 5 is a schematic flow chart of a second method in the embodiment of the invention.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present invention will be described in detail below with reference to the following detailed description and the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different structures of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted so as to not unnecessarily obscure the present invention.
Example 1
As shown in fig. 1, the present invention provides a photovoltaic grid-connected configuration-free system, which is communicatively connected with a power dispatching master station 1, and includes: the system comprises a photovoltaic inverter acquisition module 2, an automatic power generation control module 3 and a communication module 4, wherein the photovoltaic inverter acquisition module 2 is used for acquiring telemetry data and remote signaling data of a photovoltaic inverter 6, converting the acquired telemetry data and remote signaling data of the photovoltaic inverter 6 into a unified photovoltaic acquisition protocol, and transmitting the telemetry data and remote signaling data of the converted photovoltaic inverter 6 to a power dispatching master station 1 through the communication module 4; the power dispatching master station 1 is used for receiving the telemetry data and the remote signaling data of the converted photovoltaic inverter 6, generating a power generation active regulation target value according to the telemetry data and the remote signaling data of the photovoltaic inverter 6, and sending the generated power generation active regulation target value to the automatic power generation control module 3 through the communication module 4; the automatic power generation control module 3 is configured to configure output active power of the plurality of photovoltaic inverters 6 so that power generation active power variation values of all photovoltaic inverters 6 reach power generation active target values.
Further, as shown in fig. 2, the photovoltaic grid-connected configuration-free system provided by the invention further includes: the encryption module 5 is respectively in communication connection with the photovoltaic inverter acquisition module 2 and the communication module 4, and is used for receiving and encrypting the telemetry data and the remote signaling data of the converted photovoltaic inverter 6 sent by the photovoltaic inverter acquisition module, and sending the encrypted telemetry data and the remote signaling data of the converted photovoltaic inverter 6 to the power dispatching master station 1 through the communication module 4.
Specifically, the encryption module 5 can be implemented by a longitudinal encryption device, a national standard electric WeChat longitudinal encryption chip is built in the longitudinal encryption device, and an encryption tunnel is established by a longitudinal encryption device of the electric power dispatching master station 1 by adopting an SM2 encryption algorithm, so that the functions of identity bidirectional authentication, data encryption and access control are realized, a WAPI network is constructed, and a WAPI protocol (Wireless LAN Authentication and Privacy Infrastructure, which is a security protocol of a wireless local area network authentication and privacy infrastructure and is also a security mandatory standard of a China wireless local area network) is supported.
As shown in fig. 3, the photovoltaic inverter collection module 2 includes a plurality of collection sub-modules 21 and a plurality of protocol conversion sub-modules 22, where the collection sub-modules 21 (may be disposed at the photovoltaic inverter, in close-range communication with the photovoltaic inverter, or may be disposed at a position far away from the photovoltaic inverter, in remote-range communication with the photovoltaic inverter, the present invention is not limited herein) obtain model information, telemetry data and telemetry data of each photovoltaic inverter 6, determine manufacturer information corresponding to the photovoltaic inverter 6 and data protocol information corresponding to the manufacturer information according to the model information (a corresponding relation database may be pre-established, and a corresponding relation between the model information, the manufacturer information, and the photovoltaic inverter protocol information is stored), and call the corresponding protocol conversion sub-module 22 according to the data protocol information of each photovoltaic inverter 6, so as to convert the protocol of the telemetry data and the telemetry data into a unified photovoltaic collection protocol (i.e., the power IEC104 protocol). The telemetry data may include active power, reactive power, voltage, current of the photovoltaic inverter 6, and the telemetry data may include switch position, knife switch position.
The number of the collecting submodules 21 corresponds to the number of the photovoltaic inverters 6, and the number of the protocol conversion submodules 22 corresponds to the number of manufacturers of the photovoltaic inverters 6.
Specifically, each collecting sub-module 21 creates a standard photovoltaic data collection model in modbus format, specifically as follows:
telemetry data:
#1 inverter voltage
And (3) transmitting: 010300000001crc
And (3) receiving: 010302 data CRC
#1 inverter current
And (3) transmitting: 010300010001crc
And (3) receiving: 010302 data CRC
#1 inverter power
And (3) transmitting: 010300020001crc
And (3) receiving: 010302 data CRC
#1 inverter daily Power Generation
And (3) transmitting: 010300030001crc
And (3) receiving: 010302 data CRC
#1 inverter total power generation
And (3) transmitting: 010300040001crc
And (3) receiving: 010302 data CRC
#2 inverter voltage
And (3) transmitting: 010300050001crc
And (3) receiving: 010302 data CRC
#1 inverter voltage current power daily power generation total power generation amount sending: 010300000005crc
And (3) receiving: 01030A (data) 5CRC
Remote signaling data:
#1 inverter state
And (3) transmitting: 010200000008crc
And (3) receiving: 010201 data CRC low order is seven BIT later
For example, data: 13- >00010011 is 00 (quota no) 0 (derate no) 1 (standby yes) 0 (shutdown no) 0 (control shutdown no) 1 (initial standby yes) 1 (normal operation yes)
#2 inverter state
And (3) transmitting: 010200010008crc
And (3) receiving: 010201 data CRC low order is seven BIT later
#1 inverter State #2 inverter State
And (3) transmitting: 010200000010crc
And (3) receiving: 010202 data CRC
Remote regulation data:
controlling all inverter ACG percentages
And (3) transmitting: 01060000 percent crc
And (3) receiving: 0106000001CRC// set success
Rule decimal: 10000 100% 1000=10%
Example transmit control inverter ACG50%
010600001388crc
A unified standard protocol library is created in each protocol conversion sub-module 22 (modbus protocols of different forms or types are converted into power IEC104 protocols), so that the distributed photovoltaic data standardized data access is realized, specifically, photovoltaic inverter protocols (modbus protocols) of different manufacturers are converted into power IEC104 protocols, that is, each protocol conversion sub-module 22 can convert one photovoltaic inverter protocol (modbus protocol) of a certain manufacturer into power IEC104 protocols, and the number of protocol conversion sub-modules 22 is consistent with the number of manufacturers of the photovoltaic inverter 6, that is, the number of protocol conversion sub-modules 22 is consistent with the number of types of photovoltaic inverter protocols.
As shown in fig. 4, the photovoltaic inverter acquisition module 2 mainly converts photovoltaic inverter protocols of different manufacturers into a unified standard photovoltaic acquisition protocol for communication between a unified interface and the dispatching master station module. After the photovoltaic inverter acquisition module 2 is initialized, corresponding client acquisition threads are started according to photovoltaic inverter manufacturers which are configured in configuration files and need to be acquired, and data such as request voltage, current, power generation capacity and the like are traversed. After the photovoltaic inverter is accessed, a client acquisition thread is created, a power authority is firstly opened and set, then data such as request voltage, alternating current, direct current, active power, reactive power, power factor, daily power generation capacity, total power generation capacity, current power percentage and the like are traversed regularly, the data are stored in a data array in a global variable (acquisition sub-module 21) according to a unified format, and then protocol conversion is carried out by a protocol conversion sub-module 22 corresponding to the protocol type of the photovoltaic inverter (corresponding to the information of a photovoltaic inverter manufacturer), and the protocol of telemetry data and remote signaling data is converted into a unified photovoltaic acquisition protocol (power IEC104 protocol). When there is a power limit command, the automatic power generation control module 3 executes the command to the photovoltaic inverters, that is, configures the output active power of the plurality of photovoltaic inverters 6 so that the power generation active power variation values of all the photovoltaic inverters 6 reach the power generation active target value.
The power dispatching master station 1 is used for receiving telemetry data and remote signaling data of the converted photovoltaic inverter 6, and generating a power generation active regulation target value according to the telemetry data and the remote signaling data of the photovoltaic inverter 6 specifically comprises the following steps:
the power dispatching master station 1 receives the telemetry data and the remote signaling data of the converted photovoltaic inverters 6, determines the output active power of all the current photovoltaic inverters 6 according to the telemetry data and the remote signaling data of the photovoltaic inverters 6, and generates a power generation active regulation target value according to the active power of all the current photovoltaic inverters 6. For example, the output active power of the current all photovoltaic inverter 6 is determined by summing the active power information in the telemetry data of each photovoltaic inverter 6, and then the power generation active regulation target value (the power generation active regulation target value may be the difference between the output active power of the current all photovoltaic inverter and the preset active power target value of the current all photovoltaic inverter, or the difference between the output active power of the current all photovoltaic inverter and the preset active power target value of the current all photovoltaic inverter and the output active power of the current all photovoltaic inverter) is determined according to the preset active power target value of the current all photovoltaic inverter (i.e., the active power of the regulated current all photovoltaic inverter may be regularly or irregularly regulated according to the actual situation).
The automatic power generation control module 3 is also in communication connection with the photovoltaic inverter acquisition module 1, or can be in communication connection with the photovoltaic inverter acquisition module 1 through the communication module 4, or can be directly in communication connection with the power dispatching master station 1, so as to acquire telemetry data and remote signaling data of the converted photovoltaic inverters 6, determine the active power of each photovoltaic inverter 6 currently according to the telemetry data and the remote signaling data, and configure the output active power of the photovoltaic inverters 6 according to the power generation active regulation target value issued by the power dispatching master station and the active power of each photovoltaic inverter 6 currently, so that the power generation active power variation values of all the photovoltaic inverters 6 reach the power generation active regulation target value.
The configuration of the output active power of the plurality of photovoltaic inverters 6 according to the power generation active regulation target value issued by the power dispatching master station and the active power of each photovoltaic inverter 6 at present, so that the power generation reaches the power generation active target value specifically comprises:
taking one photovoltaic inverter 6 meeting preset conditions as a sample machine, and taking the active power output of the currently acquired sample machine as the maximum active power output at the current moment;
Determining the current increased active power output and the current decreased active power output of each photovoltaic inverter 6 according to the maximum active power output at the current moment and the current active power output of the photovoltaic inverter 6;
and sequencing from large to small according to the current increased active power output and the current decreased active power output of the photovoltaic inverter 6, and when the power dispatching master station sends the power generation active regulation target value, regulating and controlling step by step according to the sequencing of the photovoltaic inverter 6 until the power generation active regulation target value is reached.
The preset condition may be AGC module (Automatic Generation Control, automatic power generation control), that is, automatic power generation control module 3, and a sample machine algorithm strategy (taking a photovoltaic inverter as a sample machine, and a sample machine control principle is that power generation is firstly and finally reduced), that is, full percentage power output of a photovoltaic inverter 6 with sufficient sunlight (when average illumination is on the spot is longer than a preset illumination time threshold value, and when average illumination intensity is on the spot is greater than a preset illumination intensity threshold value) is set as the sample machine, and the power output of the output active power acquired by the sample machine at the current moment is the maximum active power output at the current moment. The current incremental active power output (the maximum active power output at the current moment of the sample machine-the current active power output of the photovoltaic inverter) of each photovoltaic inverter 6 can be calculated, and the current incremental active power output (the current active power output of the photovoltaic inverter) can be subtracted.
When the power dispatching master station sends a power generation active regulation target value, regulating and controlling are performed one by one according to the sequence of the photovoltaic inverters 6 until the power generation active regulation target value is reached, wherein the power generation active regulation target value is specifically:
when the power dispatching master station sends a power generation active regulation target value, the photovoltaic inverters 6 which are ranked forward are traversed and selected preferentially to regulate and control the output of the output active power, so that the regulation participation of the least number of photovoltaic inverters 6 is realized, and the power generation active regulation target value is reached.
Specifically, the current available active power output is the lower active power limit to which all photovoltaic inverters are currently collected. Typically, the minimum power generation amount is ensured without shutdown and dead halt of the inverter. When the state is reached, the opening and closing state is 1.
Through analyzing the generated energy of all photovoltaic inverters currently collected, when the power generation requirement is increased or reduced and can be regulated and controlled within one photovoltaic inverter, one photovoltaic inverter 6 with the maximum current regulating and controlling limit is selected for regulation and control, and one-time regulation and control are achieved. When the power generation requirement is increased or reduced and can be regulated and controlled within two photovoltaic inverters, the photovoltaic inverter 6 with the largest regulated and controlled limit is preferentially regulated, the second largest photovoltaic inverter 6 is selected, the regulation and control are completed twice, when the power generation requirement is increased or reduced and can be regulated and controlled within three photovoltaic inverters 6, the photovoltaic inverter with the largest regulated and controlled limit (current increased active power output or current decreased active power output) is preferentially regulated and controlled, the second largest photovoltaic inverter 6 is selected, the third largest photovoltaic inverter 6 is selected, the regulation and control are completed for three times, and the like. The output power of the photovoltaic inverter 6 is configured with a minimum number of photovoltaic inverters involved in the regulation, a minimum number of regulation times.
The fastest regulation speed is the shortest time of the field test collection period and the regulation period according to the current response speed of the photovoltaic inverter 6, so that the aim of immediately issuing the next control command after the regulation is completed by the inverter during collection on the premise of not influencing the regulation of the inverter is achieved, namely, the instruction issuing time of the automatic power generation control module 3 to the photovoltaic inverter 6 is longer than the response time of the photovoltaic inverter to be regulated, and the difference value of the response time of the automatic power generation control module 3 to the photovoltaic inverter 6, which is longer than the response time of the photovoltaic inverter to be regulated, is as small as possible, namely, is smaller than the threshold value of the preset duration.
The communication module 4 can be a 5G communication module, and is provided with an SA independent networking mode through the 5G communication module, and is connected with a power 5G power slicing private network through a power special internet of things card, so as to be connected with a safe access area of the power dispatching master station 1, realize private network communication with the power dispatching master station 1, ensure low-delay and high-reliability channels, high network speed and stable connection of transmission data.
The photovoltaic inverter acquisition module is used for acquiring telemetry data and remote signaling data of the photovoltaic inverter, converting the acquired telemetry data and remote signaling data of the photovoltaic inverter into a unified photovoltaic acquisition protocol, and transmitting the telemetry data and remote signaling data of the photovoltaic inverter after conversion to the power dispatching master station; the power dispatching master station is used for receiving the telemetry data and the telemetry data of the converted photovoltaic inverter, generating a power generation active regulation target value according to the telemetry data and the telemetry data of the photovoltaic inverter, and sending the generated power generation active regulation target value to the automatic power generation control module through the communication module; the automatic power generation control module is used for configuring the output active power of the photovoltaic inverters, so that the power generation active power change values of all the photovoltaic inverters reach the power generation active target value, automatic regulation control and management of each photovoltaic inverter are realized, the problems of high difficulty and low efficiency of distributed photovoltaic grid-connected configuration caused by the prior art are effectively solved, the distributed photovoltaic grid-connected configuration efficiency is effectively improved, and the configuration difficulty is reduced.
The system in the technical scheme of the invention further comprises: the encryption module is used for receiving and encrypting the telemetry data and the remote signaling data of the converted photovoltaic inverter, which are sent by the photovoltaic inverter acquisition module, and sending the encrypted telemetry data and the remote signaling data of the converted photovoltaic inverter to the power dispatching master station through the communication module, so that the reliability and the safety of communication between the photovoltaic inverter of the power grid and the power dispatching master station are improved.
The photovoltaic inverter acquisition module comprises a plurality of acquisition sub-modules and a plurality of protocol conversion sub-modules, wherein the acquisition sub-modules acquire model information of each photovoltaic inverter, determine manufacturer information corresponding to the photovoltaic inverter and data protocol information corresponding to the manufacturer information according to the model information, and call the corresponding protocol conversion sub-modules according to the data protocol information of each photovoltaic inverter so as to convert the protocol of telemetry data and remote signaling data into a unified photovoltaic acquisition protocol; and the photovoltaic access standards of different manufacturers are standardized, unified access of various photovoltaic inverters is realized, and the operation and maintenance difficulty and the operation and maintenance cost are reduced.
According to the technical scheme, an automatic power generation control module acquires telemetry data and remote signaling data of converted photovoltaic inverters, active power of each photovoltaic inverter is determined according to the telemetry data and the remote signaling data, the current increasable active power output and the current decreasable active power output of the photovoltaic inverters are respectively sequenced from large to small, when a power dispatching master station sends a power generation active regulation target value, photovoltaic inverters with front sequencing are selected to be traversed preferentially to regulate and control the output active power output, and the output power target value required by a power dispatching mechanism is achieved by the least number of photovoltaic inverters to participate in regulation, the least regulation times and the fastest regulation speed, so that powerful technical support is provided for realizing 'adjustable and controllable' of a low-voltage distributed power supply; the integral design scheme of the photovoltaic inverter grid-connected configuration-free rapid application technology is formed, and the data acquisition, transmission and calculation efficiency of various communication terminals is improved.
Example two
As shown in fig. 5, the technical solution of the present invention further provides a photovoltaic grid-connected configuration-free method, which is implemented based on the photovoltaic grid-connected configuration-free system in the first embodiment, and includes:
s1, a photovoltaic inverter acquisition module acquires telemetry data and remote signaling data of a photovoltaic inverter, the acquired telemetry data and remote signaling data of the photovoltaic inverter are converted into a unified photovoltaic acquisition protocol, and the telemetry data and the remote signaling data of the photovoltaic inverter after conversion are sent to a power dispatching master station;
s2, the power dispatching master station is used for receiving telemetry data and remote signaling data of the converted photovoltaic inverter, generating a power generation active regulation target value according to the telemetry data and the remote signaling data of the photovoltaic inverter, and sending the generated power generation active regulation target value to the automatic power generation control module through the communication module;
and S3, the automatic power generation control module is used for configuring the output active power output of the photovoltaic inverters so that the comprehensive power generation active power output of all the photovoltaic inverters reaches a power generation active target value.
In step S1, the photovoltaic inverter acquisition module mainly converts photovoltaic inverter protocols of different manufacturers into a unified standard photovoltaic acquisition protocol for communication between a unified interface and the scheduling master station module. After the photovoltaic inverter acquisition module is initialized, a corresponding client acquisition thread is started according to photovoltaic inverter manufacturers which are configured in the configuration file and need to be acquired, and data such as request voltage, current, power generation capacity and the like are traversed. After the photovoltaic inverter is accessed, a client acquisition thread is created, a power authority is firstly opened and set, then data such as request voltage, alternating current, direct current, active power, reactive power, power factor, daily generating capacity, total generating capacity, current power percentage and the like are traversed regularly, the data are stored in a data array in a global variable (acquisition submodule) according to a unified format, protocol conversion is carried out by a protocol conversion submodule corresponding to the protocol type of the photovoltaic inverter (corresponding to the information of a photovoltaic inverter manufacturer), and the protocol of telemetry data and remote signaling data is converted into a unified photovoltaic acquisition protocol (electric IEC104 protocol).
In step S2, the power dispatching master station is configured to receive telemetry data and telemetry data of the converted photovoltaic inverter, and generate a power generation active regulation target value according to the telemetry data and the telemetry data of the photovoltaic inverter specifically as follows:
the power dispatching master station receives the telemetry data and the telemetry data of the converted photovoltaic inverters, determines the output active power of all the current photovoltaic inverters according to the telemetry data and the telemetry data of the photovoltaic inverters, and generates a power generation active regulation target value according to the active power of all the current photovoltaic inverters. For example, the output active power of the current all photovoltaic inverters is determined by summing the active power information in the telemetry data of each photovoltaic inverter, and then the power generation active regulation target value (the power generation active regulation target value may be the difference between the output active power of the current all photovoltaic inverters and the preset active power target value of the current all photovoltaic inverters, or the difference between the output active power of the current all photovoltaic inverters and the preset active power target value of the current all photovoltaic inverters) is determined according to the preset active power target value of the current all photovoltaic inverters (i.e. the active power of the regulated current all photovoltaic inverters may be regularly or irregularly regulated according to the actual situation).
In step S3, the automatic power generation control module is further in communication connection with the photovoltaic inverter acquisition module through the communication module, or may be directly in communication connection with the power dispatching master station, so as to obtain telemetry data and telemetry data of the converted photovoltaic inverters, determine the active power of each current photovoltaic inverter according to the telemetry data and the telemetry data, and configure the output active power of the photovoltaic inverters according to the power generation active regulation target value issued by the power dispatching master station and the active power of each current photovoltaic inverter, so that the power generation active power variation values of all the photovoltaic inverters reach the power generation active regulation target value.
The method specifically comprises the steps of configuring output active power of a plurality of inverters according to a power generation active regulation target value issued by a power dispatching master station and the active power of each photovoltaic inverter at present, so that the power generation power reaches the power generation active target value, wherein the method specifically comprises the following steps:
taking a photovoltaic inverter meeting preset conditions as a sample machine, and taking the active power output of the currently collected sample machine as the maximum active power output at the current moment;
determining the current increased active power output and the current decreased active power output of each photovoltaic inverter according to the maximum active power output at the current moment and the current active power output of the photovoltaic inverter;
And sequencing from large to small according to the current increased active power output and the current decreased active power output of the photovoltaic inverter, and regulating and controlling the power dispatching master station according to the sequencing of the photovoltaic inverter when the power dispatching master station sends the power generation active regulation target value until the power generation active regulation target value is reached.
The preset condition may be an AGC module (Automatic Generation Control, automatic power generation control), that is, an automatic power generation control module, and a sample machine algorithm strategy (taking an inverter as a sample machine, and a sample machine control principle is that power generation is firstly and finally reduced), that is, a full percentage power output of a photovoltaic inverter with sufficient sunlight (when average illumination is on the spot, the length of the photovoltaic inverter is longer than a preset illumination time threshold, and the average illumination intensity is greater than a preset illumination intensity threshold) is set as the sample machine, and the power output of the output active power acquired by the sample machine at the current moment is the maximum active power output at the current moment. The current increased active power output (the maximum active power output of the sample machine at the current moment-the current active power output of the photovoltaic inverter) of each photovoltaic inverter can be calculated, and the current increased active power output (the current active power output of the photovoltaic inverter) can be subtracted.
When the power dispatching master station sends a power generation active regulation target value, regulating and controlling the photovoltaic inverters one by one according to the sequence of the photovoltaic inverters until the power generation active regulation target value is reached, wherein the power generation active regulation target value is specifically:
when the power dispatching master station sends a power generation active regulation target value, photovoltaic inverters with the front order are preferentially traversed and selected to regulate and control output active power output, so that the regulation participation of the least number of photovoltaic inverters is realized, and the power generation active regulation target value is reached.
Specifically, the current available active power output is the lower active power limit to which all photovoltaic inverters are currently collected. Typically, the minimum power generation amount is ensured without shutdown and dead halt of the inverter. When the state is reached, the opening and closing state is 1.
Through analyzing the generated energy of all photovoltaic inverters currently collected, when the power generation requirement is increased or reduced and can be regulated and controlled within one, one inverter with the maximum current regulation and control limit is selected for regulation and control, and one-time regulation and control is achieved. When the power generation requirement is increased or reduced and can be regulated and controlled within two, one inverter with the largest adjustable limit is preferentially regulated, the second largest inverter is selected to realize twice complete regulation, when the power generation requirement is increased or reduced and can be regulated and controlled within three, one photovoltaic inverter with the largest adjustable limit (current increased active power output or current reduced active power output) is preferentially regulated and controlled, the second largest photovoltaic inverter is selected, the third largest photovoltaic inverter is selected to realize three times of complete regulation, and the like. The output power of the photovoltaic inverter is configured with the least number of inverters involved in regulation and the least number of regulation times,
The fastest regulation speed is the shortest time of the field test collection period and the regulation period according to the current response speed of the photovoltaic inverter, so that the aim of immediately issuing the next control command after the regulation is completed by the inverter in the collection is achieved on the premise that the regulation of the inverter is not influenced, namely, the instruction issuing time of the automatic power generation control module 3 to the photovoltaic inverter is longer than the response time of the photovoltaic inverter to be regulated, and the difference value of the instruction issuing time of the automatic power generation control module to the photovoltaic inverter is longer than the response time of the photovoltaic inverter to be regulated as small as possible, namely, is smaller than a preset time threshold.
The photovoltaic inverter acquisition module is used for acquiring telemetry data and remote signaling data of the photovoltaic inverter, converting the acquired telemetry data and remote signaling data of the photovoltaic inverter into a unified photovoltaic acquisition protocol, and transmitting the telemetry data and remote signaling data of the photovoltaic inverter after conversion to the power dispatching master station; the power dispatching master station is used for receiving the telemetry data and the telemetry data of the converted photovoltaic inverter, generating a power generation active regulation target value according to the telemetry data and the telemetry data of the photovoltaic inverter, and sending the generated power generation active regulation target value to the automatic power generation control module through the communication module; the automatic power generation control module is used for configuring the output active power of the photovoltaic inverters, so that the power generation active power change values of all the photovoltaic inverters reach the power generation active target value, automatic regulation control and management of each photovoltaic inverter are realized, the problems of high difficulty and low efficiency of distributed photovoltaic grid-connected configuration caused by the prior art are effectively solved, the distributed photovoltaic grid-connected configuration efficiency is effectively improved, and the configuration difficulty is reduced.
The system in the technical scheme of the invention further comprises: the encryption module is used for receiving and encrypting the telemetry data and the remote signaling data of the converted photovoltaic inverter, which are sent by the photovoltaic inverter acquisition module, and sending the encrypted telemetry data and the remote signaling data of the converted photovoltaic inverter to the power dispatching master station through the communication module, so that the reliability and the safety of communication between the photovoltaic inverter of the power grid and the power dispatching master station are improved.
The photovoltaic inverter acquisition module comprises a plurality of acquisition sub-modules and a plurality of protocol conversion sub-modules, wherein the acquisition sub-modules acquire model information of each photovoltaic inverter, determine manufacturer information corresponding to the photovoltaic inverter and data protocol information corresponding to the manufacturer information according to the model information, and call the corresponding protocol conversion sub-modules according to the data protocol information of each photovoltaic inverter so as to convert the protocol of telemetry data and remote signaling data into a unified photovoltaic acquisition protocol; and the photovoltaic access standards of different manufacturers are standardized, unified access of various photovoltaic inverters is realized, and the operation and maintenance difficulty and the operation and maintenance cost are reduced.
According to the technical scheme, the automatic power generation control module acquires telemetry data and remote signaling data of the converted photovoltaic inverters, active power of each photovoltaic inverter is determined according to the telemetry data and the remote signaling data, the current increasable active power output and the current decreasable active power output of the photovoltaic inverters are respectively sequenced from large to small, when a power dispatching master station sends a power generation active regulation target value, photovoltaic inverters with front sequencing are selected to be traversed preferentially to regulate and control the output active power output, and the output power target value required by a power dispatching mechanism is achieved by the least number of photovoltaic inverters to participate in regulation, the least regulation times and the fastest regulation speed, so that powerful technical support is provided for realizing 'adjustable and controllable' of a low-voltage distributed power supply.
While the foregoing description of the embodiments of the present invention has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the invention, but rather, it is intended to cover all modifications or variations within the scope of the invention as defined by the claims of the present invention.
Claims (10)
1. A photovoltaic grid-connected configuration-free system, which is in communication connection with a power dispatching master station, comprising: the system comprises a photovoltaic inverter acquisition module, an automatic power generation control module and a communication module, wherein the photovoltaic inverter acquisition module is used for acquiring telemetry data and remote signaling data of a photovoltaic inverter, converting the acquired telemetry data and remote signaling data of the photovoltaic inverter into a unified photovoltaic acquisition protocol, and transmitting the telemetry data and remote signaling data of the photovoltaic inverter after conversion to a power dispatching master station through the communication module; the power dispatching master station is used for receiving the telemetry data and the remote signaling data of the converted photovoltaic inverter, generating a power generation active regulation target value according to the telemetry data and the remote signaling data of the photovoltaic inverter, and sending the generated power generation active regulation target value to the automatic power generation control module through the communication module; the automatic power generation control module is used for configuring the output active power of the photovoltaic inverters so that the power generation active power change values of all the photovoltaic inverters reach the power generation active target value.
2. The photovoltaic grid-tie configuration-free system of claim 1, further comprising: the encryption module is respectively in communication connection with the photovoltaic inverter acquisition module and the communication module and is used for receiving and encrypting the telemetry data and the remote signaling data of the converted photovoltaic inverter sent by the photovoltaic inverter acquisition module and sending the encrypted telemetry data and the remote signaling data of the converted photovoltaic inverter to the power dispatching master station through the communication module.
3. The photovoltaic grid-connected configuration-free system according to claim 1 or 2, wherein the photovoltaic inverter acquisition module comprises a plurality of acquisition sub-modules and a plurality of protocol conversion sub-modules, the acquisition sub-modules acquire model information, telemetry data and telemetry data of each photovoltaic inverter, determine manufacturer information corresponding to the photovoltaic inverters and data protocol information corresponding to the manufacturer information according to the model information, call the corresponding protocol conversion sub-modules according to the data protocol information of each photovoltaic inverter, and convert protocols of the telemetry data and the telemetry data into unified photovoltaic acquisition protocols.
4. A grid-tie photovoltaic configuration-free system according to claim 3, wherein the number of collection sub-modules corresponds to the number of photovoltaic inverters, and the number of protocol conversion sub-modules corresponds to the number of manufacturers of photovoltaic inverters.
5. The grid-tied photovoltaic no-configuration system of claim 1, wherein the telemetry data comprises active power, reactive power, voltage, current of the photovoltaic inverter, and the telemetry data comprises switch position, knife switch position.
6. The photovoltaic grid-connected configuration-free system according to claim 1, wherein the power dispatching master station is configured to receive telemetry data and telemetry data of the photovoltaic inverter after protocol conversion, and generate a power generation active regulation target value according to the telemetry data and the telemetry data of the photovoltaic inverter specifically comprises:
and the power dispatching master station receives the telemetry data and the remote signaling data of the converted photovoltaic inverters, determines the output active power of all the current photovoltaic inverters according to the telemetry data and the remote signaling data of the photovoltaic inverters, and generates a power generation active regulation target value according to the active power of all the current photovoltaic inverters.
7. The photovoltaic grid-connected configuration-free system according to claim 1, wherein the automatic power generation control module is further in communication connection with the photovoltaic inverter acquisition module, acquires telemetry data and telemetry data of the converted photovoltaic inverters, determines active power of each photovoltaic inverter currently according to the telemetry data and the telemetry data, and configures output active power of the photovoltaic inverters according to a power generation active regulation target value issued by the power scheduling master station and the active power of each photovoltaic inverter currently, so that power generation active power variation values of all the photovoltaic inverters reach the power generation active regulation target value.
8. The photovoltaic grid-connected configuration-free system according to claim 7, wherein the configuring the output active power of the plurality of inverters according to the power generation active regulation target value issued by the power dispatching master station and the active power of each photovoltaic inverter at present so that the power generation power reaches the power generation active target value specifically comprises:
taking a photovoltaic inverter meeting preset conditions as a sample machine, and taking the active power output of the currently collected sample machine as the maximum active power output at the current moment;
determining the current increased active power output and the current decreased active power output of each photovoltaic inverter according to the maximum active power output at the current moment and the current active power output of the photovoltaic inverter;
and sequencing from large to small according to the current increased active power output and the current decreased active power output of the photovoltaic inverter, and regulating and controlling the power dispatching master station according to the sequencing of the photovoltaic inverter when the power dispatching master station sends the power generation active regulation target value until the power generation active regulation target value is reached.
9. The photovoltaic grid-connected configuration-free system according to claim 8, wherein when the power dispatching master station sends the power generation active regulation target value, regulating and controlling are performed one by one according to the sequence of the photovoltaic inverters until the power generation active regulation target value is reached, specifically:
When the power dispatching master station sends a power generation active regulation target value, photovoltaic inverters with the front order are preferentially traversed and selected to regulate and control output active power output, so that the regulation participation of the least number of photovoltaic inverters is realized, and the power generation active regulation target value is reached.
10. A photovoltaic grid-connected configuration-free method, characterized by being implemented on the basis of a photovoltaic grid-connected configuration-free system according to any one of claims 1-9, comprising:
the method comprises the steps that a photovoltaic inverter acquisition module acquires telemetry data and remote signaling data of a photovoltaic inverter, the acquired telemetry data and remote signaling data of the photovoltaic inverter are converted into a unified photovoltaic acquisition protocol, and the telemetry data and the remote signaling data of the photovoltaic inverter after conversion are sent to a power dispatching master station through a communication module;
the power dispatching master station is used for receiving the telemetry data and the telemetry data of the converted photovoltaic inverter, generating a power generation active regulation target value according to the telemetry data and the telemetry data of the photovoltaic inverter, and sending the generated power generation active regulation target value to the automatic power generation control module through the communication module;
the automatic power generation control module is used for configuring output active power output of the photovoltaic inverters so that comprehensive power generation active power output of all the photovoltaic inverters reaches a power generation active target value.
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