CN220692834U - Combined frequency modulation system for power station - Google Patents
Combined frequency modulation system for power station Download PDFInfo
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- CN220692834U CN220692834U CN202323577378.1U CN202323577378U CN220692834U CN 220692834 U CN220692834 U CN 220692834U CN 202323577378 U CN202323577378 U CN 202323577378U CN 220692834 U CN220692834 U CN 220692834U
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- 238000010248 power generation Methods 0.000 description 15
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Abstract
The utility model relates to the technical field of power equipment, in particular to a power station combined frequency modulation system, which comprises: comprising a control device and a terminal device, wherein the control device comprises: the monitoring equipment monitors the frequency data of the point of connection in real time; the grid-connected control equipment receives a scheduling instruction of an external power grid and sends out a control signal according to the scheduling instruction; the processing equipment receives the frequency data sent by the monitoring equipment, determines a first adjusting instruction according to the frequency data, receives a control signal sent by the grid-connected control equipment, and determines a second adjusting instruction according to the control signal; the terminal device is in signal connection with the processing device, and comprises: wind power EMS, and with wind power EMS signal connection's fan converter, energy storage EMS, and with energy storage PCS of energy storage EMS signal connection.
Description
Technical Field
The utility model relates to the technical field of power equipment, in particular to a power station combined frequency modulation system.
Background
The participation of new energy power stations in frequency modulation has a number of limitations. The problems of limited adjustable margin and insufficient adjustment capability exist in the participation of new energy sources such as wind and light in frequency modulation, and especially the difficulty in up-regulation is high. In order to meet the frequency modulation requirement of the power grid, the new energy station usually adopts a method of reserving spare capacity by electricity limiting operation or configures an energy storage system with certain capacity. The reserve capacity is reserved for a long time, so that the wind and light resources are seriously wasted, and the frequency modulation cost is too high only by energy storage. Different energy sources such as wind power, photovoltaic and energy storage participate in frequency modulation independently, multiple different types of energy sources are not combined, the respective regulation characteristics and advantages are fully exerted, the highest energy utilization efficiency is difficult to achieve, the economic operation of a new energy power station is not facilitated, the stable operation of a power grid is also not facilitated, and the frequency modulation requirements are responded by single equipment, so that the requirements on frequency modulation precision and efficiency cannot be met.
Disclosure of Invention
The utility model aims to provide a combined frequency modulation system of a power station aiming at the defects of the prior art, and aims to solve the problem that the accuracy and efficiency of frequency modulation cannot be met by adopting single equipment to respond to the frequency modulation requirement in the prior art.
The utility model realizes the above purpose through the following technical scheme:
a power station joint frequency modulation system, comprising a control device and a terminal device, wherein the control device comprises:
monitoring equipment for monitoring the frequency data of the grid-connected points in real time;
grid-connected control equipment for receiving a scheduling instruction of an external power grid and sending a control signal according to the scheduling instruction; and
The processing equipment is in signal connection with the monitoring equipment and the grid-connected control equipment, receives frequency data sent by the monitoring equipment and receives control signals sent by the grid-connected control equipment;
the terminal device is in signal connection with the processing device, and comprises:
wind power EMS, and a fan converter connected with the wind power EMS signal,
the energy storage EMS and the energy storage PCS are in signal connection with the energy storage EMS.
Further, the monitoring device, the processing device and the terminal device are connected through a first communication link, the grid-connected control device, the processing device and the terminal device are connected through a second communication link, and the communication rate of the first communication link is higher than a preset rate.
Further, the processing apparatus includes:
the data processor is used for calculating a first frequency modulation requirement according to the frequency data and calculating a second frequency modulation requirement according to the control signal;
the first frequency modulator is electrically connected with the data processor and is used for calculating first adjusting power and obtaining a first power adjusting scheme, and the first frequency modulator is in signal connection with the terminal device and sends a first frequency modulating instruction;
and the second frequency modulator is electrically connected with the data processor, is responsible for calculating second adjusting power and obtaining a second power adjusting scheme, is in signal connection with the terminal device and transmits a second frequency modulation instruction.
Further, the first frequency modulator is connected with the fan converter and the energy storage PCS signal, and the second frequency modulator is connected with the wind power EMS and the energy storage EMS signal.
Further, the terminal device further includes: the photovoltaic EMS is in signal connection with the processing equipment, and the photovoltaic inverter is in signal connection with the photovoltaic EMS.
Furthermore, the grid-connected control equipment comprises an AGC system for receiving the frequency modulation demand sent by the power grid, and the AGC system sends an AGC instruction as a control signal according to the frequency modulation demand.
The utility model has the beneficial effects that: according to the complementary characteristics of wind and light and the rapid charge and discharge capability of energy storage, the wind power generation system and the energy storage system are integrally subjected to unified frequency modulation control, frequency modulation power distribution between wind power and energy storage is realized by processing equipment, the capacity of long-term standby of wind and light power generation for meeting the frequency modulation requirement of a power grid is reduced, and the wind power utilization rate and the power generation economic benefit are improved on the basis of meeting the frequency modulation performance. In addition, the wind-storage combined primary frequency modulation system directly controls equipment to be regulated by utilizing a high-speed communication channel, so that the frequency modulation response speed and the regulation rate are improved, the characteristic of energy storage quick response is utilized, the fluctuation range of the regulation power is further reduced, and the regulation precision is improved.
Drawings
Fig. 1 is a schematic diagram of a power station joint frequency modulation system provided by the utility model.
Fig. 2 is a schematic structural diagram of a processing device in the power station combined frequency modulation system provided by the utility model.
Fig. 3 is a schematic structural view of an embodiment of the present utility model.
Detailed Description
The present utility model will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the present utility model provides a power station united fm system, which includes a control device and a terminal device, wherein the control device includes:
the monitoring equipment is used for monitoring the frequency data of the point of connection in real time;
the grid-connected control equipment receives a scheduling instruction of an external power grid and sends out a control signal according to the scheduling instruction; and
The processing equipment is in signal connection with the monitoring equipment and the grid-connected control equipment through optical fibers, receives frequency data sent by the monitoring equipment, determines a first adjusting instruction according to the frequency data, receives a control signal sent by the grid-connected control equipment, and determines a second adjusting instruction according to the control signal;
the terminal device is in signal connection with the processing device, and comprises:
wind power EMS (Energy Management System, hereinafter EMS), and a fan converter in signal connection with said wind power EMS,
the energy storage EMS and the energy storage PCS are in signal connection with the energy storage EMS.
According to the wind power generation system, the photovoltaic power generation system and the energy storage system, the wind power generation system, the photovoltaic power generation system and the energy storage system are integrally subjected to unified frequency modulation control according to the complementary characteristics of wind and light and the rapid charge and discharge capability of energy storage, frequency modulation power distribution between wind power and energy storage is realized by using processing equipment, the capacity of long-term standby of wind and light power generation for meeting the frequency modulation requirement of a power grid is reduced, and the wind and light utilization rate and the power generation economic benefit are improved on the basis of meeting the frequency modulation performance. In addition, the wind-solar-energy-storage combined primary frequency modulation system directly controls equipment to be regulated by utilizing a high-speed communication channel, so that the frequency modulation response speed and the regulation rate are improved, the fluctuation range of the regulation power is reduced by utilizing the characteristic of energy storage rapid response, and the regulation precision is improved.
In another implementation of the present solution, as shown in fig. 3, the difference from the first embodiment is that: the terminal device may further include a photovoltaic EMS, and a photovoltaic inverter in signal connection with the photovoltaic EMS.
In one embodiment, the monitoring device is connected to the processing device and the terminal device through a first communication link, and the grid-connected control device is connected to the processing device and the terminal device through a second communication link, where a communication rate of the first communication link is higher than a predetermined rate.
Specifically, the monitoring equipment is high-precision measurement and control equipment, and is used for monitoring the frequency of wind power, the frequency of photovoltaic and the receiving and discharging frequency of energy storage in the new energy power station in real time, so that the power station can be tuned in real time, and the power station can be maintained at a specific frequency to generate power, and the communication rate of the first communication link is more than 1000 kilobits per second; for control signals sent by grid-connected control equipment, the power station is not required to be subjected to frequency modulation in real time, so that a second communication link with lower communication speed than the first communication link and low cost can be adopted; the technical effects that the frequency of the power station can be monitored in real time through the monitoring equipment and fine frequency modulation is carried out in real time are achieved, meanwhile, the technical effect that the frequency modulation is carried out on the power station in time according to the grid connection requirement is achieved through the grid connection control equipment, and the double communication links do not interfere with each other.
In yet another embodiment, as shown in fig. 2, the processing device includes:
the data processor is used for calculating a first frequency modulation requirement according to the frequency data and calculating a second frequency modulation requirement according to the control signal;
the first frequency modulator is electrically connected with the data processor and is used for calculating first adjusting power and obtaining a first power adjusting scheme, and the first frequency modulator is in signal connection with the terminal device and sends a first frequency modulating instruction;
and the second frequency modulator is electrically connected with the data processor, is responsible for calculating second adjusting power and obtaining a second power adjusting scheme, is in signal connection with the terminal device and transmits a second frequency modulation instruction.
Specifically, real-time frequency data monitored by the monitoring equipment are sent to a data processor of the processing equipment, the data processor is used for calculating, the power station is obtained to regulate down or regulate up the frequency, then the frequency regulation requirement is sent to the first frequency modulator, the first frequency modulator calculates the power which should be regulated by the corresponding power grid, then the power distribution is carried out according to the conditions of a fan, photovoltaic and energy storage, and finally the power regulation scheme is sent to the fan converter, the photovoltaic inverter and the energy storage PCS.
The grid-connected control equipment converts the frequency modulation data sent by the grid control center into an AGC signal, sends the AGC signal to a data processor of the processing equipment, calculates the AGC signal through the data processor to obtain that the power station should regulate down or regulate up the frequency, then sends the frequency modulation requirement to the second frequency modulator, the second frequency modulator calculates the power which should be regulated by the corresponding grid, then distributes the power according to the conditions of a fan, photovoltaic and energy storage, and finally sends the power regulation scheme to the fan EMS, the photovoltaic EMS and the energy storage EMS.
The scheme reasonably utilizes the complementary characteristics of wind, light and energy between storages, and further achieves the technical effect of timely, accurately and finely obtaining frequency modulation of the power station.
In one embodiment, the first frequency modulator is connected with the fan converter and the energy storage PCS signal, and the second frequency modulator is connected with the wind power EMS and the energy storage EMS signal.
Specifically, the first frequency modulation instruction is a converter directly sent to the fan, a photovoltaic inverter and an energy-storage PCS, so that the instruction can be immediately executed; the second frequency modulation instruction is not required to be fast in response speed, and is sent to the wind power EMS, the photovoltaic EMS and the energy storage EMS, and the wind power, the photovoltaic and the energy storage are indirectly controlled through the EMS, so that the technical effect of sending different grades of adjustment instructions to wind power and light storage equipment according to different lines to realize a frequency modulation function is achieved.
In the implementation, the first power distribution unit of the first frequency modulator and the second power distribution unit of the second frequency modulator set a power distribution scheme in real time according to the photovoltaic power generation frequency, the fan power generation frequency and the residual energy of the stored energy.
Specifically, how to distribute the adjusting power not only depends on the frequency modulation requirement, but also specifically considers the power generation capacity of the wind-light storage equipment, and under the condition of small wind power, more photovoltaic and energy storage are needed to bear some power, so that the adjusting precision is improved, and the wind-light storage power generation system is more coordinated and more fully utilized.
In one embodiment, the terminal device further comprises: the photovoltaic EMS is in signal connection with the processing equipment, and the photovoltaic inverter is in signal connection with the photovoltaic EMS.
Specifically, in the new energy power station, there are a wind power generation system, a photovoltaic power generation system, an energy storage system, and a wind-light storage device, wherein the wind-light storage device comprises an EMS subsystem for assisting in adjusting a fan, photovoltaic and energy storage, and also comprises a fan converter, a photovoltaic inverter and an energy storage PCS; the EMS subsystem is connected with the converter, the inverter and the PCS, and the second regulator completes indirect regulation of the power station frequency through the EMS subsystem, so that the technical effect of meeting regulation requirements on different power station frequencies through double regulation links is achieved.
In a specific implementation, the grid-connected control device comprises an AGC system for receiving a frequency modulation demand sent by a power grid, and the AGC system sends an AGC command as a control signal according to the frequency modulation demand.
Specifically, in the frequency modulation system, the AGC system is composed of a frequency modulation factory and a scheduling end. In a frequency modulation plant, an AGC system automatically adjusts the steam or fuel quantity of a generator by monitoring the output frequency and the rotating speed of the generator in real time so as to control the output power of the generator. At a dispatching end, the AGC system acquires the frequency and load information of the system through communication with a dispatching center of the power system, and automatically adjusts the output power of the generator according to the requirements and targets of the system; the AGC system participates in frequency adjustment, so that the technical effect of frequency adjustment of the power station according to the power grid requirement is achieved.
In view of the above, the present utility model has the above-mentioned excellent characteristics, so that it can be used to improve the performance and practicality of the prior art, and is a product with great practical value.
The foregoing is merely exemplary of the present utility model, and those skilled in the art should not be considered as limiting the utility model, since modifications may be made in the specific embodiments and application scope of the utility model in light of the teachings of the present utility model.
Claims (6)
1. A power station joint frequency modulation system, comprising a control device and a terminal device, characterized in that the control device comprises:
monitoring equipment for monitoring the frequency data of the grid-connected points in real time;
grid-connected control equipment for receiving a scheduling instruction of an external power grid and sending a control signal according to the scheduling instruction; and
The processing equipment is in signal connection and receives frequency data sent by the monitoring equipment, and is in signal connection and receives control signals sent by the grid-connected control equipment;
the terminal device is signal-connected to the processing apparatus, comprising:
wind power EMS, a fan converter connected with the wind power EMS signal,
the energy storage EMS and the energy storage PCS are in signal connection with the energy storage EMS.
2. The power station integrated frequency modulation system of claim 1 wherein the monitoring device, the processing device, and the fan converter are connected to the energy storage PCS by a first communication link, and wherein the grid-tie control device, the processing device, and the wind power EMS are connected to the energy storage EMS by a second communication link, wherein a communication rate of the first communication link is higher than a predetermined rate.
3. The power plant complex frequency modulation system of claim 1, wherein the processing device comprises:
the data processor is used for calculating a first frequency modulation requirement according to the frequency data and calculating a second frequency modulation requirement according to the control signal;
the first frequency modulator is electrically connected with the data processor, is in signal connection with the terminal device and transmits a first frequency modulation instruction;
and the second frequency modulator is electrically connected with the data processor, is in signal connection with the terminal device and transmits a second frequency modulation instruction.
4. The power plant integrated frequency modulation system of claim 3 wherein the first frequency modulator is in signal connection with the fan converter and the stored energy PCS signal and the second frequency modulator is in signal connection with the wind power EMS and the stored energy EMS.
5. The power plant complex frequency modulation system of claim 1, wherein the terminal device further comprises:
the photovoltaic EMS is in signal connection with the processing equipment, and the photovoltaic inverter is in signal connection with the photovoltaic EMS.
6. The utility grid-tie fm system of claim 1, wherein the grid-tie control device includes an AGC system that receives a frequency modulation demand from the grid, the AGC system transmitting an AGC command as a control signal based on the frequency modulation demand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323577378.1U CN220692834U (en) | 2023-12-27 | 2023-12-27 | Combined frequency modulation system for power station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323577378.1U CN220692834U (en) | 2023-12-27 | 2023-12-27 | Combined frequency modulation system for power station |
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| CN220692834U true CN220692834U (en) | 2024-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202323577378.1U Active CN220692834U (en) | 2023-12-27 | 2023-12-27 | Combined frequency modulation system for power station |
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| CN (1) | CN220692834U (en) |
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2023
- 2023-12-27 CN CN202323577378.1U patent/CN220692834U/en active Active
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