CN112290565A - Primary frequency modulation deloading operation topological structure - Google Patents
Primary frequency modulation deloading operation topological structure Download PDFInfo
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- CN112290565A CN112290565A CN202011260405.0A CN202011260405A CN112290565A CN 112290565 A CN112290565 A CN 112290565A CN 202011260405 A CN202011260405 A CN 202011260405A CN 112290565 A CN112290565 A CN 112290565A
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- 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
- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
- H02J3/144—Demand-response operation of the power transmission or distribution network
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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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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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
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil 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
- 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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
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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
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
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Abstract
The invention belongs to the technical field of primary frequency modulation of photovoltaic power stations, and particularly relates to a primary frequency modulation deloading operation topological structure. In particular to a primary frequency modulation locking operation topological structure formed by a primary frequency modulation special channel, a load shedding energy storage device and a frequency detection module. The technical scheme for realizing the primary frequency modulation function of the photovoltaic power station is deeply analyzed, and the topological structure and corresponding hardware equipment of the photovoltaic power station are optimized. Aiming at the power control mode of the photovoltaic power station, the load shedding level of the photovoltaic power station is enhanced, so that the photovoltaic power station participates in primary frequency modulation of a system, the variable quantity of the system frequency is reduced, and the stability of power output is improved; the time loss caused by the data transmission quantity is shortened, and the system response adjustment time is effectively improved.
Description
Technical Field
The invention belongs to the technical field of primary frequency modulation of photovoltaic power stations, and particularly relates to a primary frequency modulation deloading operation topological structure. In particular to a primary frequency modulation locking operation topological structure formed by a primary frequency modulation special channel, a load shedding energy storage device and a frequency detection module.
Background
The effect of the photovoltaic power station participating in primary frequency modulation is influenced by the arrangement of the load shedding level. When the illumination becomes weak, the load shedding level of the photovoltaic power station is reduced, the spare capacity participating in primary frequency modulation is reduced, and the capacity of participating in the primary frequency modulation is weakened. When illumination becomes strong, the load shedding level of the photovoltaic power station is increased, the spare capacity participating in primary frequency modulation is increased, and the capacity of participating in the primary frequency modulation is also strengthened. When a large-scale photovoltaic power station is connected to an isolated power grid, system inertia is reduced, the frequency modulation capability is insufficient, and safe and stable operation of the power grid is affected.
The existing photovoltaic power station topological structure and the participation in primary frequency modulation have many defects, the refresh frequency of the measurement and control feedback value of a box is slow, or a frequency detection module is not installed, and the load can hardly meet the requirement of the primary frequency modulation. And a plurality of topological structures are connected to a remote control device through a data acquisition measurement and control device and then transmitted back to a receiving frequency modulation device or an AGC system, and the adjustment time is far out of the aim of participating in primary frequency modulation due to overlarge uploading data volume and overlong feedback time.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a primary frequency modulation deloading operation topological structure. Aiming at the power control mode of the photovoltaic power station, the load shedding level of the photovoltaic power station is enhanced, the photovoltaic power station participates in primary frequency modulation of a system, the variation of the system frequency is reduced, and the stability of power output is improved; the invention aims to shorten the time loss caused by data transmission quantity and effectively improve the response adjustment time of a system.
The technical scheme adopted by the invention for realizing the purpose is as follows:
a primary frequency modulation load shedding operation topological structure comprises a host, wherein a frequency monitoring module is connected between the host and a telecontrol device, the output end of the frequency monitoring module is connected with the input end of a trigger type fault recording device in a current input mode, and the trigger action process is fed back to the fault recording device through a Transmission Control Protocol (TCP) 104; the tail end of the host is coupled with the energy storage device cache unit through a special channel, and the output end of the energy storage device is connected with a load and a power grid.
The topological structure is also provided with a measurement and control data acquisition device, and the measurement and control data acquisition device is provided with a reserved port and is connected with a control system; the measurement and control data acquisition device is provided with a special channel triggering judgment program for judging whether the power grid frequency reaches a primary frequency modulation range or not, and the judgment program is used as a judgment basis for starting the special channel.
The special channel is a primary frequency modulation special channel, a message polling mechanism is optimized, and real-time active power is uploaded when the message polling mechanism is triggered.
The frequency monitoring module comprises a system primary frequency modulation function locking/overlapping logic algorithm, and when the fact that the frequency of the power grid exceeds a primary frequency modulation threshold value is detected, frequency adjustment quantity and an active power adjustment value are overlapped, and meanwhile a reverse active power adjustment instruction is locked.
The primary frequency modulation function locking/superposition logic algorithm is used for setting a system primary frequency modulation dead zone, a difference adjustment parameter, a channel opening logic algorithm and a response amplitude.
The frequency monitoring module is used for monitoring the real-time frequency of the power grid, connecting 104+ to an input port of the telecontrol device, and connecting 104-to an input port of the host; and a fault wave recording device is arranged below the frequency monitoring module, the action times, the response time and the difference modulation waveform of a primary frequency modulation response action event are recorded, and the recorded data content comprises the related information of the current system frequency, the total active power and the like.
The fault recording device is a triggered fault recording device and comprises a primary frequency modulation trigger memory for recording the action times of response events; after the special channel is started, the first adjustment feedback value received by the measurement and control data acquisition device is the one-time action frequency, the threshold value and the reported active curve prediction data.
The energy storage device is connected between the output port of the host and the special channel, corrects the host point table and uploads a real-time active value; and adding a primary frequency modulation judgment logic, closing the special channel point table for receiving when the system normally operates, and starting the special channel when the frequency monitoring module monitors that the system frequency reaches an action threshold.
A primary frequency modulation deloading operation topology device, comprising:
a memory storing a computer program;
a processor executing the computer program.
Wherein the processor, when executing the computer program, performs the steps of any of the topologies described herein.
A computer storage medium having a computer program stored thereon, the computer program when executed by a processor implementing the steps of a chirp offloading operation topology.
The invention has the following beneficial effects and advantages:
according to the national standard requirements, the technical scheme for realizing the primary frequency modulation function of the photovoltaic power station is deeply analyzed, and the topological structure and corresponding hardware equipment of the photovoltaic power station are optimized. Aiming at the power control mode of the photovoltaic power station, the load shedding level of the photovoltaic power station is enhanced, so that the photovoltaic power station participates in primary frequency modulation of a system, the variable quantity of the system frequency is reduced, and the stability of power output is improved; the time loss caused by the data transmission quantity is shortened, the system response adjustment time is effectively prolonged, and the practicability is high.
The invention also has the following functions and effects:
1. the active power-frequency characteristic of primary frequency modulation is used for adjusting the active power output value of the photovoltaic power station to realize the function of quick frequency response. The dead zone, the difference modulation rate and the power response amplitude during primary frequency modulation are adjustable.
2. When the primary frequency modulation is triggered, the full locking operation is performed.
3. The primary frequency modulation has quick response.
4. The system has the functions of data monitoring and wave recording, and can record the grid-connected point information of the photovoltaic power station and the running state and feedback condition of the inverter during primary frequency modulation in real time.
5. And monitoring the frequency of the power grid.
6. And judging whether the frequency of the power grid reaches a frequency modulation range or not, and judging whether the frequency of the system reaches an action threshold or not.
7. A recording function: and recording information such as total action times, total action time and the like of the quick frequency response.
8. Simulating a test function: the device has the functions of simulating and testing the rapid frequency response, simulating the frequency change of a power grid and testing the rapid response of primary frequency modulation.
9. The data uploading function comprises: the quick frequency response action times, action data and relevant telemetering, remote signaling, fault information and the like are required to be uploaded to an upper-level system.
Drawings
The above and or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a topology of the primary frequency modulated latch-up operation of the present invention;
FIG. 2 is a diagram of the input and output connections of the frequency monitoring module of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
The solution of some embodiments of the invention is described below with reference to fig. 1 and 2.
Example 1
The invention relates to a primary frequency modulation load shedding operation topological structure, which is shown in figure 1, and figure 1 is a primary frequency modulation locking operation topological diagram of the invention, which is shown by a bold arrow part in the figure.
The primary frequency modulation deloading operation topological structure is applied to a photovoltaic power station and comprises the following components: frequency monitoring module, primary frequency modulation record ripples module and dedicated channel and energy memory.
The invention specifically relates to a frequency monitoring module connected between a telecontrol device and a host, wherein the output end of the frequency monitoring module is connected with the input end of a trigger type fault recording device in a current input mode, and the trigger action process is fed back to the fault recording device through a TCP 104.
The tail end of the host is coupled with the cache unit of the energy storage device through a special channel, and the output end of the energy storage device is connected with a load and a power grid
The invention has a primary frequency modulation channel triggering mechanism, a primary frequency modulation locking operation function, a load shedding operation function, a primary frequency modulation frequency detection and judgment triggering and primary frequency modulation quick response adjusting channel, and can improve the primary frequency modulation load shedding level and static characteristic output.
Compared with the traditional topological structure, the invention is additionally provided with a frequency monitoring module and a system primary frequency modulation blocking/overlapping logic algorithm, when the power grid frequency is detected to exceed a primary frequency modulation threshold value, the frequency regulating quantity and the active power regulating value are overlapped, and meanwhile, a reverse active power regulating instruction is locked.
The invention reserves a primary frequency modulation special channel, optimizes a message polling mechanism, only uploads real-time active power when triggered, and coexists with the original uploading channel. The measurement and control data acquisition device is provided with a reserved port which can be directly connected with a control system, and a CPU and a connector are not reserved and additionally installed. And a special channel triggering judgment program is added to judge whether the power grid frequency reaches a primary frequency modulation range or not as a judgment basis for starting the special channel.
The invention also adds a primary frequency modulation wave recording module to improve the related remote measurement and remote signaling. And increasing a primary frequency modulation trigger memory to record the action times of the response event. After the special channel is started, the first adjustment feedback value received by the measurement and control data acquisition device is related data such as the number of times of one action, a threshold value, the forecast of an active curve and the like.
The invention also adds an energy storage device, and the limited electric energy of the inverter unit is stored in the energy storage device by using the frequency modulation module when the frequency of the power grid is increased. Of course, the frequency rise of the system is only a small probability event, and other storage modes can be set. When the frequency of the power grid is reduced, energy is released, and the active power output capacity is rapidly improved.
Example 2
The present embodiment provides a primary frequency modulation deloading operation topology, and in addition to the technical features of the foregoing embodiments, the present embodiment further includes the following technical features.
1. A frequency monitoring module is additionally arranged between the telecontrol device and the host machine and used for monitoring the real-time frequency of a power grid, 104+ is directly connected to an input port of the telecontrol device, and 104-is connected to an input port of the host machine.
2. The host adds a primary frequency modulation function locking/superposition logic algorithm, and sets a system primary frequency modulation dead zone, a difference adjustment parameter, a channel opening logic algorithm and a response amplitude.
3. And a trigger type fault recording device is arranged below the frequency monitoring module, the action times, the response time and the difference modulation waveform of a primary frequency modulation response action event are recorded, and the recorded data content comprises the current system frequency, the total active power and other related information.
4. And adding an energy storage device at the tail end of the host, connecting an output port of the host with the special channel, correcting a host point table, uploading a real-time power value, adding a primary frequency modulation judgment logic, closing the special channel point table for receiving in normal operation, and starting the special channel when the frequency monitoring module monitors that the system frequency reaches an action threshold.
5. The protection and alarm functions are added, necessary protection alarm signals are provided aiming at the primary frequency modulation quick response, and misoperation caused by instantaneous frequency mutation due to sampling abnormity, voltage fluctuation, single short circuit and the like is prevented.
Example 3
The embodiment provides a primary frequency modulation deloading operation topological structure which is suitable for primary frequency modulation of a photovoltaic power station. The method specifically comprises the following steps:
step 2, adding a switch and a connection port, and modifying the point table into real-time active power;
step 3, adding an energy storage device;
step 4, adding a fault recording device;
and 5, the communication mode between the energy storage device and the host computer is not consistent with the original communication mode.
The topology method of this embodiment adopts the primary frequency modulation deloading operation topology structure according to any embodiment of the present invention, which has all the advantages described in any embodiment of the present invention.
Example 4
The present embodiment provides a topology apparatus, including: a memory storing a computer program. A processor executing the computer program.
Wherein the processor, when executing the computer program, implements the steps of the topological method according to any of the embodiments of the present invention.
The topology apparatus of this embodiment adopts the topology method according to any embodiment of the present invention, which has all the advantages described in any embodiment of the present invention.
Example 5
Based on the same inventive concept, an embodiment of the present invention further provides a computer storage medium, where a computer program is stored on the computer storage medium, and when the computer program is executed by a processor, the steps of the topology method for primary frequency modulation deloading operation described in embodiment 3 are implemented.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. A primary frequency modulation deloading operation topological structure comprises a host and is characterized in that: a frequency monitoring module is connected between the host and the telecontrol device, the output end of the frequency monitoring module is connected with the input end of the trigger type fault recording device in a current input mode, and the trigger action process is fed back to the fault recording device through the TCP 104; the tail end of the host is coupled with the energy storage device cache unit through a special channel, and the output end of the energy storage device is connected with a load and a power grid.
2. A primary frequency modulation deloading operation topology as recited in claim 1, wherein: the topological structure is also provided with a measurement and control data acquisition device, and the measurement and control data acquisition device is provided with a reserved port and is connected with a control system; the measurement and control data acquisition device is provided with a special channel triggering judgment program for judging whether the power grid frequency reaches a primary frequency modulation range or not, and the judgment program is used as a judgment basis for starting the special channel.
3. A primary frequency modulation deloading operation topology as recited in claim 1, wherein: the special channel is a primary frequency modulation special channel, a message polling mechanism is optimized, and real-time active power is uploaded when the message polling mechanism is triggered.
4. A primary frequency modulation deloading operation topology as recited in claim 1, wherein: the frequency monitoring module comprises a system primary frequency modulation function locking/overlapping logic algorithm, and when the fact that the frequency of the power grid exceeds a primary frequency modulation threshold value is detected, frequency adjustment quantity and an active power adjustment value are overlapped, and meanwhile a reverse active power adjustment instruction is locked.
5. A primary frequency modulation deloading operation topology as recited in claim 4, wherein: the primary frequency modulation function locking/superposition logic algorithm is used for setting a system primary frequency modulation dead zone, a difference adjustment parameter, a channel opening logic algorithm and a response amplitude.
6. A primary frequency modulation deloading operation topology as recited in claim 1, wherein: the frequency monitoring module is used for monitoring the real-time frequency of the power grid, connecting 104+ to an input port of the telecontrol device, and connecting 104-to an input port of the host; and a fault wave recording device is arranged below the frequency monitoring module, the action times, the response time and the difference modulation waveform of a primary frequency modulation response action event are recorded, and the recorded data content comprises the related information of the current system frequency, the total active power and the like.
7. The primary frequency modulation deloading operation topology of claim 6, wherein: the fault recording device is a triggered fault recording device and comprises a primary frequency modulation trigger memory for recording the action times of response events; after the special channel is started, the first adjustment feedback value received by the measurement and control data acquisition device is the one-time action frequency, the threshold value and the reported active curve prediction data.
8. A primary frequency modulation deloading operation topology as recited in claim 1, wherein: the energy storage device is connected between the output port of the host and the special channel, corrects the host point table and uploads a real-time active value; and adding a primary frequency modulation judgment logic, closing the special channel point table for receiving when the system normally operates, and starting the special channel when the frequency monitoring module monitors that the system frequency reaches an action threshold.
9. A primary frequency modulation deloading operation topological device is characterized in that: the method comprises the following steps:
a memory storing a computer program;
a processor executing the computer program;
wherein the processor, when executing the computer program, performs the steps of any of the topologies of claims 1-8.
10. A computer storage medium, characterized by: the computer storage medium having stored thereon a computer program that, when executed by a processor, performs the steps of one of the chirp shedding operation topologies of claims 1-8.
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| CN113452035A (en) * | 2021-06-17 | 2021-09-28 | 阳光新能源开发有限公司 | Frequency modulation control method, frequency modulation control apparatus, storage medium, and program product |
| CN113452035B (en) * | 2021-06-17 | 2024-04-02 | 阳光新能源开发股份有限公司 | Frequency modulation control method, frequency modulation control device, frequency modulation control storage medium, and frequency modulation control program product |
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