CN214255728U - Primary frequency modulation deloading operation topological structure - Google Patents
Primary frequency modulation deloading operation topological structure Download PDFInfo
- Publication number
- CN214255728U CN214255728U CN202022608579.3U CN202022608579U CN214255728U CN 214255728 U CN214255728 U CN 214255728U CN 202022608579 U CN202022608579 U CN 202022608579U CN 214255728 U CN214255728 U CN 214255728U
- Authority
- CN
- China
- Prior art keywords
- frequency modulation
- primary frequency
- photovoltaic power
- topological structure
- primary
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model belongs to the technical field of photovoltaic power generation station primary frequency modulation, especially, relate 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 utility model discloses go deep into the analysis to the technical scheme that photovoltaic power plant primary frequency modulation function realized, optimized photovoltaic power plant's topological structure and corresponding hardware equipment. 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 variation 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.
Description
Technical Field
The utility model belongs to the technical field of photovoltaic power generation station primary frequency modulation, especially, relate 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
To the weak point that exists among the above-mentioned prior art, the utility model provides a primary control 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 utility model discloses a realize that the technical scheme that above-mentioned purpose adopted is:
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 special channel is a primary frequency modulation special channel.
And 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 connected below the frequency monitoring module.
The fault recording device is a trigger type fault recording device.
The triggered fault recording device comprises a primary frequency modulation trigger memory.
The energy storage device is connected between the output port of the host and the dedicated channel.
The utility model has the following beneficial effects and advantages:
the utility model discloses according to the national standard requirement, carry out deep analysis to the technical scheme that photovoltaic power plant primary frequency modulation function realized, optimized photovoltaic power plant's topological structure and corresponding hardware equipment. The utility model aims 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 the primary frequency modulation of the system, the variation of the system frequency is reduced, and the stability of the 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 utility model discloses still have following function and effect:
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 topological diagram of the operation of the primary frequency modulation lock of the present invention;
fig. 2 is the input/output wiring diagram 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 and detailed description. 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 technical solutions of some embodiments of the present invention are described below with reference to fig. 1 and 2.
Example 1
The utility model relates to a primary frequency modulation deloading operation topological structure, as shown in fig. 1, fig. 1 is the utility model discloses primary frequency modulation shutting operation topological graph, as shown in the thick arrow point part that adds in the picture.
The utility model discloses primary control deloading operation topological structure is applied to photovoltaic power station, and it includes: frequency monitoring module, primary frequency modulation record ripples module and dedicated channel and energy memory.
The utility model discloses be connected with frequency monitoring module between telemechanical device and host computer, frequency monitoring module's output passes through the current input mode and connects the input that triggers formula trouble record ripples device, triggers the action process and feeds back to trouble record ripples device through 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 utility model discloses have primary control channel trigger mechanism, primary control shutting operation function, deloading operation function, primary control frequency detect and judge and trigger and primary control quick response adjust the passageway, can improve primary control deloading level and static characteristic output.
The utility model discloses more traditional topological structure has increased frequency monitoring module to increase system primary frequency modulation function shutting/stack logical algorithm, when detecting the electric wire netting frequency and surpassing the primary frequency modulation threshold value, superpose frequency adjustment volume and active power regulating value, lock reverse active power adjustment instruction simultaneously.
The utility model discloses reserve the primary channel that has, optimize message polling mechanism, only upload real-time active when triggering, coexists with original upload passageway. 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 utility model discloses still increased primary control record ripples module, perfect relevant telemetering measurement, remote signalling. 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 utility model discloses still increase energy memory, utilize the frequency modulation module, when the electric wire netting frequency risees, the electric energy storage of the dc-to-ac converter unit of restriction is in energy memory. 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:
1. adding a frequency monitoring module;
2. adding a switch and a connection port, and modifying a point table into real-time active power;
3. adding an energy storage device;
4. a fault recording device is added;
5. the communication mode between the energy storage device and the host may not be the same as the original communication mode.
The topological method of this embodiment adopts like the utility model discloses any embodiment once frequency modulation deloading operation topological structure, it has like the utility model discloses any embodiment whole beneficial effect.
Finally, it should be noted that:
the above embodiments are only used 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 of the embodiments of the invention may be made without departing from the spirit and scope of the invention, which should be construed as falling within the scope of the claims of the invention.
Claims (8)
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.
3. A primary frequency modulation deloading operation topology as recited in claim 1, wherein: the special channel is a primary frequency modulation special channel.
4. A primary frequency modulation deloading operation topology as recited in claim 1, wherein: and 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.
5. A primary frequency modulation deloading operation topology as recited in claim 1, wherein: and a fault wave recording device is connected below the frequency monitoring module.
6. A primary frequency modulation deloading operation topology as recited in claim 5, wherein: the fault recording device is a trigger type fault recording device.
7. The primary frequency modulation deloading operation topology of claim 6, wherein: the triggered fault recording device comprises a primary frequency modulation trigger memory.
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 dedicated channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022608579.3U CN214255728U (en) | 2020-11-12 | 2020-11-12 | Primary frequency modulation deloading operation topological structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022608579.3U CN214255728U (en) | 2020-11-12 | 2020-11-12 | Primary frequency modulation deloading operation topological structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214255728U true CN214255728U (en) | 2021-09-21 |
Family
ID=77731992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022608579.3U Active CN214255728U (en) | 2020-11-12 | 2020-11-12 | Primary frequency modulation deloading operation topological structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214255728U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112290565A (en) * | 2020-11-12 | 2021-01-29 | 辽宁东科电力有限公司 | Primary frequency modulation deloading operation topological structure |
-
2020
- 2020-11-12 CN CN202022608579.3U patent/CN214255728U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112290565A (en) * | 2020-11-12 | 2021-01-29 | 辽宁东科电力有限公司 | Primary frequency modulation deloading operation topological structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110488199B (en) | Alarm response method for battery system of high-capacity battery energy storage power station | |
| WO2022100323A1 (en) | Perception system for operating state of large transformer based on sound-vibration integration | |
| CN101826754B (en) | On-line detection and operation maintenance system of transformer station | |
| CN112380695B (en) | Offshore wind farm current collection system reliability acquisition method considering real-time wind speed | |
| CN214255728U (en) | Primary frequency modulation deloading operation topological structure | |
| CN113219278A (en) | Primary frequency modulation test system and method for new energy station | |
| CN105137213A (en) | Data communication real-time diagnosis system and method | |
| CN201742159U (en) | Online detection and operation and maintenance system for transformer station | |
| CN214707179U (en) | Monitoring and safety control system for offshore wind power hydrogen production and energy storage system | |
| CN112290565A (en) | Primary frequency modulation deloading operation topological structure | |
| CN104833896A (en) | Fault point direction discrimination method for wind power generation power transmission lines | |
| CN110954799A (en) | TBS valve bank thyristor level online state detection method in UPFC | |
| CN111799765B (en) | Microgrid distributed system protection method and device | |
| CN103532520A (en) | Reactive power compensation device control method for preventing large-scale chain offline of wind generation sets | |
| CN109340038B (en) | Power gradual change fault judgment method based on continuous slope change threshold judgment | |
| Xiao et al. | Analysis and Optimization Strategy of Dual Slave Fault in Flexible-HVDC Valve Control System | |
| CN220120913U (en) | Online testing system of relay protection device | |
| CN203573160U (en) | High-voltage switch cabinet fault detecting system | |
| CN218633352U (en) | Isolated network operation system and power generation system for waste heat power generation | |
| CN218867927U (en) | 10kV distribution transformer neutral point automatic grounding device | |
| CN216082949U (en) | New forms of energy frequency modulation and inertia function test device | |
| CN216718523U (en) | Leakage current method high tension switchgear insulating ability on-line monitoring system | |
| CN112542822B (en) | 35KV electric-collecting ring main unit protection system and method for wind farm | |
| JP3244672U (en) | Distributed fault oscillograph | |
| CN116417968B (en) | Low-voltage relay protection method based on low-code controller |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |