A primary frequency modulation intelligent collaborative control system

Abstract

A primary frequency modulation intelligent collaborative control system. The frequency modulation process is not combined with the unit main steam pressure, the furnace combustion and the auxiliary machine load constraint, which is easy to cause parameter overrun and unit instability. The application comprises a power grid unit parameter acquisition module, which is used for synchronously acquiring power grid and unit core parameters, providing accurate data support for frequency modulation research and judgment and power regulation, and outputting a synchronous standardized parameter set; a frequency modulation working condition intelligent research and judgment module, which is used for identifying frequency disturbance types and unit operation conditions, matching corresponding frequency modulation strategies, and outputting differentiated frequency modulation control instructions; a multi-source power collaborative compensation module, which is used for integrating steam turbine control valve, fuel, air volume and energy storage auxiliary multi-channel compensation, realizing power rapid response, and outputting multi-dimensional power compensation instructions; and a unit safety constraint regulation and control module. The application is used for primary frequency modulation intelligent collaborative control.

Description

Technical Field

[0001] This invention relates to a primary frequency modulation intelligent collaborative control system. Background Technology

[0002] Primary frequency regulation of thermal power units is the core means of maintaining grid frequency stability. When grid frequency deviates, the unit needs to quickly adjust its power generation to offset the frequency disturbance. Existing primary frequency regulation control systems have several shortcomings: First, frequency signal acquisition is lagging, and disturbance analysis is simplistic, failing to distinguish between high- and low-frequency disturbances, and between instantaneous and continuous disturbances. Second, power regulation relies solely on single offset adjustment by the turbine control valve, resulting in limited adjustment range, slow response speed, and a low frequency regulation qualification rate. Third, the frequency regulation process does not consider constraints such as main steam pressure, furnace combustion, and auxiliary equipment load, easily leading to parameter exceedances and unit instability. Fourth, the lack of a dynamic compensation mechanism results in significant attenuation of frequency regulation capabilities under deep peak shaving and low-load conditions, failing to meet grid control requirements. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a primary frequency modulation intelligent cooperative control system.

[0004] The above objectives are achieved through the following technical solutions: A primary frequency modulation intelligent cooperative control system, comprising: The power grid unit parameter acquisition module is used to synchronously acquire core parameters of the power grid and the generating units, providing accurate data support for frequency regulation analysis and power regulation, and outputting a synchronous standardized parameter set; The frequency regulation condition intelligent judgment module is used to identify the type of frequency disturbance and the unit's operating condition, match the corresponding frequency regulation strategy, and output differentiated frequency regulation control commands. The multi-source power collaborative compensation module is used to integrate multi-channel compensation of turbine control valve, fuel, air volume, and energy storage auxiliary, so as to achieve rapid power response and output multi-dimensional power compensation commands; The unit safety constraint control module is used to constrain the frequency regulation amplitude and rate to prevent unit parameters from exceeding limits during frequency regulation and ensure safe operation of the equipment. The frequency modulation closed-loop verification and optimization module is used to verify the frequency modulation effect, dynamically optimize control parameters, achieve iterative upgrades, and improve long-term frequency modulation accuracy.

[0005] The aforementioned primary frequency regulation intelligent collaborative control system includes a power grid unit parameter acquisition module comprising: The power grid parameter acquisition unit is used to acquire real-time power grid frequency, frequency deviation, frequency change rate, and power grid load disturbance signals at high frequency. The sampling frequency is not less than 100ms to capture instantaneous frequency disturbances. The unit power acquisition unit is used to collect the unit's real-time power generation, active power deviation, and reactive power parameters, and accurately feedback the unit's current output status. The main body parameter acquisition unit is used to collect unit constraint parameters such as main steam pressure, main steam temperature, furnace negative pressure, turbine control valve opening, and auxiliary equipment operating current. The data synchronization preprocessing unit is used to complete the time-series synchronization of multi-source data, filtering and noise reduction, anomaly removal, and output high-precision, synchronized chemical condition parameters.

[0006] The aforementioned primary frequency modulation intelligent collaborative control system includes a frequency modulation condition intelligent judgment module comprising: The disturbance type identification unit is used to distinguish four types of disturbances based on the amplitude and rate of change of frequency deviation: high-frequency disturbance, low-frequency disturbance, instantaneous pulse disturbance, and continuous offset disturbance. The unit operating condition determination unit is used to identify five operating conditions of the unit: steady-state operation, load increase, load decrease, deep peak shaving, and low-load stable combustion, and to determine the current frequency regulation margin of the unit. The strategy matching unit is used to match four differentiated control strategies—fast frequency regulation, steady-state frequency regulation, limited frequency regulation, and deep frequency regulation—based on the type of disturbance and the unit's operating conditions.

[0007] The aforementioned primary frequency modulation intelligent collaborative control system includes a multi-source power collaborative compensation module comprising: The power deficit calculation unit is used to calculate the required power compensation based on the frequency deviation value and in accordance with the power grid frequency regulation criteria, and to distinguish between positive power increase and negative power decrease requirements. The fast valve compensation unit is used to prioritize the rapid opening and closing of the turbine's high-speed valve, achieving millisecond-level power rapid response and offsetting instantaneous frequency disturbances; The fuel air volume lag compensation unit is used to adjust the output of the coal feeder and the air volume of the forced and induced draft fans in response to continuous frequency disturbances, to make up for the lack of continuity of the short-term adjustment of the regulating valve and maintain power stability. The auxiliary energy storage compensation unit is used to call upon the unit's matching energy storage device to assist in charging and discharging when the frequency regulation margin is insufficient under low load conditions, thereby supplementing the power gap and improving the frequency regulation capability under deep peak shaving conditions.

[0008] The aforementioned primary frequency regulation intelligent collaborative control system includes a unit safety constraint control module comprising: The parameter limit monitoring unit is used to monitor core parameters such as main steam pressure, temperature, furnace negative pressure, and load change rate in real time to determine whether they exceed the limits. The regulating and limiting unit is used to dynamically limit the regulating valve adjustment range, fuel acceleration / deceleration rate, and load change rate according to parameter limits, thereby preventing operation beyond parameters. The abnormal interlocking unit is used to automatically interlock the aggressive frequency regulation action and switch to the safe and conservative frequency regulation mode when the unit experiences abnormal parameters or equipment failure.

[0009] The aforementioned primary frequency modulation intelligent collaborative control system includes a frequency modulation closed-loop verification and optimization module comprising: The frequency regulation effect verification unit is used to compare the deviation of grid frequency and unit power before and after frequency regulation, and to calculate the frequency regulation response time, regulation accuracy, and pass rate indicators. The parameter iterative optimization unit is used to adaptively optimize control parameters such as valve response coefficient, fuel compensation coefficient, and constraint threshold based on the verification results. The data storage and traceability unit is used to store data, control parameters, and performance indicators for each frequency modulation process, providing data support for subsequent strategy optimization. Beneficial effects

[0010] 1. This invention realizes multi-source coordinated frequency regulation, breaking through the limitations of traditional single-gate regulation and significantly improving response speed; it adapts to the frequency regulation needs of the entire load range through operating condition differentiation strategy matching; it adds a unit safety constraint mechanism to balance frequency regulation accuracy and equipment safety; and the dynamic iterative optimization mechanism continuously improves the frequency regulation qualification rate. Attached Figure Description

[0011] Appendix Figure 1 This is a schematic diagram of the present invention. Detailed Implementation

[0012] A primary frequency modulation intelligent cooperative control system, comprising: The power grid unit parameter acquisition module is used to synchronously acquire core parameters of the power grid and the generating units, providing accurate data support for frequency regulation analysis and power regulation, and outputting a synchronous standardized parameter set; The frequency regulation condition intelligent judgment module is used to identify the type of frequency disturbance and the unit's operating condition, match the corresponding frequency regulation strategy, and output differentiated frequency regulation control commands. The multi-source power collaborative compensation module is used to integrate multi-channel compensation of turbine control valve, fuel, air volume, and energy storage auxiliary, so as to achieve rapid power response and output multi-dimensional power compensation commands; The unit safety constraint control module is used to constrain the frequency regulation amplitude and rate to prevent unit parameters from exceeding limits during frequency regulation and ensure safe operation of the equipment. The frequency modulation closed-loop verification and optimization module is used to verify the frequency modulation effect, dynamically optimize control parameters, achieve iterative upgrades, and improve long-term frequency modulation accuracy.

[0013] The aforementioned primary frequency regulation intelligent collaborative control system includes a power grid unit parameter acquisition module comprising: The power grid parameter acquisition unit is used to acquire real-time power grid frequency, frequency deviation, frequency change rate, and power grid load disturbance signals at high frequency. The sampling frequency is not less than 100ms to capture instantaneous frequency disturbances. The unit power acquisition unit is used to collect the unit's real-time power generation, active power deviation, and reactive power parameters, and accurately feedback the unit's current output status. The main body parameter acquisition unit is used to collect unit constraint parameters such as main steam pressure, main steam temperature, furnace negative pressure, turbine control valve opening, and auxiliary equipment operating current. The data synchronization preprocessing unit is used to complete the time-series synchronization of multi-source data, filtering and noise reduction, anomaly removal, and output high-precision, synchronized chemical condition parameters.

[0014] The aforementioned primary frequency modulation intelligent collaborative control system includes a frequency modulation condition intelligent judgment module comprising: The disturbance type identification unit is used to distinguish four types of disturbances based on the amplitude and rate of change of frequency deviation: high-frequency disturbance, low-frequency disturbance, instantaneous pulse disturbance, and continuous offset disturbance. The unit operating condition determination unit is used to identify five operating conditions of the unit: steady-state operation, load increase, load decrease, deep peak shaving, and low-load stable combustion, and to determine the current frequency regulation margin of the unit. The strategy matching unit is used to match four differentiated control strategies—fast frequency regulation, steady-state frequency regulation, limited frequency regulation, and deep frequency regulation—based on the type of disturbance and the unit's operating conditions.

[0015] The aforementioned primary frequency modulation intelligent collaborative control system includes a multi-source power collaborative compensation module comprising: The power deficit calculation unit is used to calculate the required power compensation based on the frequency deviation value and in accordance with the power grid frequency regulation criteria, and to distinguish between positive power increase and negative power decrease requirements. The fast valve compensation unit is used to prioritize the rapid opening and closing of the turbine's high-speed valve, achieving millisecond-level power rapid response and offsetting instantaneous frequency disturbances; The fuel air volume lag compensation unit is used to adjust the output of the coal feeder and the air volume of the forced and induced draft fans in response to continuous frequency disturbances, to make up for the lack of continuity of the short-term adjustment of the regulating valve and maintain power stability. The auxiliary energy storage compensation unit is used to call upon the unit's matching energy storage device to assist in charging and discharging when the frequency regulation margin is insufficient under low load conditions, thereby supplementing the power gap and improving the frequency regulation capability under deep peak shaving conditions.

[0016] The aforementioned primary frequency regulation intelligent collaborative control system includes a unit safety constraint control module comprising: The parameter limit monitoring unit is used to monitor core parameters such as main steam pressure, temperature, furnace negative pressure, and load change rate in real time to determine whether they exceed the limits. The regulating and limiting unit is used to dynamically limit the regulating valve adjustment range, fuel acceleration / deceleration rate, and load change rate according to parameter limits, thereby preventing operation beyond parameters. The abnormal interlocking unit is used to automatically interlock the aggressive frequency regulation action and switch to the safe and conservative frequency regulation mode when the unit experiences abnormal parameters or equipment failure.

[0017] The aforementioned primary frequency modulation intelligent collaborative control system includes a frequency modulation closed-loop verification and optimization module comprising: The frequency regulation effect verification unit is used to compare the deviation of grid frequency and unit power before and after frequency regulation, and to calculate the frequency regulation response time, regulation accuracy, and pass rate indicators. The parameter iterative optimization unit is used to adaptively optimize control parameters such as valve response coefficient, fuel compensation coefficient, and constraint threshold based on the verification results. The data storage and traceability unit is used to store data, control parameters, and performance indicators for each frequency modulation process, providing data support for subsequent strategy optimization.

Claims

1. A primary frequency modulation intelligent cooperative control system, characterized in that: Its components include: The power grid unit parameter acquisition module is used to synchronously acquire core parameters of the power grid and the generating units, providing accurate data support for frequency regulation analysis and power regulation, and outputting a synchronous standardized parameter set; The frequency regulation condition intelligent judgment module is used to identify the type of frequency disturbance and the unit's operating condition, match the corresponding frequency regulation strategy, and output differentiated frequency regulation control commands. The multi-source power collaborative compensation module is used to integrate multi-channel compensation of turbine control valve, fuel, air volume, and energy storage auxiliary, so as to achieve rapid power response and output multi-dimensional power compensation commands; The unit safety constraint control module is used to constrain the frequency regulation amplitude and rate to prevent unit parameters from exceeding limits during frequency regulation and ensure safe operation of the equipment. The frequency modulation closed-loop verification and optimization module is used to verify the frequency modulation effect, dynamically optimize control parameters, achieve iterative upgrades, and improve long-term frequency modulation accuracy.

2. The primary frequency modulation intelligent cooperative control system according to claim 1, characterized in that: The aforementioned power grid unit parameter acquisition module includes: The power grid parameter acquisition unit is used to acquire real-time power grid frequency, frequency deviation, frequency change rate, and power grid load disturbance signals at high frequency. The sampling frequency is not less than 100ms to capture instantaneous frequency disturbances. The unit power acquisition unit is used to collect the unit's real-time power generation, active power deviation, and reactive power parameters, and accurately feedback the unit's current output status. The main body parameter acquisition unit is used to collect unit constraint parameters such as main steam pressure, main steam temperature, furnace negative pressure, turbine control valve opening, and auxiliary equipment operating current. The data synchronization preprocessing unit is used to complete the time-series synchronization of multi-source data, filtering and noise reduction, anomaly removal, and output high-precision, synchronized chemical condition parameters.

3. The primary frequency modulation intelligent cooperative control system according to claim 1, characterized in that: The aforementioned frequency modulation operating condition intelligent judgment module includes: The disturbance type identification unit is used to distinguish four types of disturbances based on the amplitude and rate of change of frequency deviation: high-frequency disturbance, low-frequency disturbance, instantaneous pulse disturbance, and continuous offset disturbance. The unit operating condition determination unit is used to identify five operating conditions of the unit: steady-state operation, load increase, load decrease, deep peak shaving, and low-load stable combustion, and to determine the current frequency regulation margin of the unit. The strategy matching unit is used to match four differentiated control strategies—fast frequency regulation, steady-state frequency regulation, limited frequency regulation, and deep frequency regulation—based on the type of disturbance and the unit's operating conditions.

4. The primary frequency modulation intelligent cooperative control system according to claim 1, characterized in that: The multi-source power collaborative compensation module includes: The power deficit calculation unit is used to calculate the required power compensation based on the frequency deviation value and in accordance with the power grid frequency regulation criteria, and to distinguish between positive power increase and negative power decrease requirements. The fast valve compensation unit is used to prioritize the rapid opening and closing of the turbine's high-speed valve, achieving millisecond-level power rapid response and offsetting instantaneous frequency disturbances; The fuel air volume lag compensation unit is used to adjust the output of the coal feeder and the air volume of the forced and induced draft fans in response to continuous frequency disturbances, to make up for the lack of continuity of the short-term adjustment of the regulating valve and maintain power stability. The auxiliary energy storage compensation unit is used to call upon the unit's matching energy storage device to assist in charging and discharging when the frequency regulation margin is insufficient under low load conditions, thereby supplementing the power gap and improving the frequency regulation capability under deep peak shaving conditions.

5. The primary frequency modulation intelligent cooperative control system according to claim 1, characterized in that: The unit safety constraint control module includes: The parameter limit monitoring unit is used to monitor core parameters such as main steam pressure, temperature, furnace negative pressure, and load change rate in real time to determine whether they exceed the limits. The regulating and limiting unit is used to dynamically limit the regulating valve adjustment range, fuel acceleration / deceleration rate, and load change rate according to parameter limits, thereby preventing operation beyond parameters. The abnormal interlocking unit is used to automatically interlock the aggressive frequency regulation action and switch to the safe and conservative frequency regulation mode when the unit experiences abnormal parameters or equipment failure.

6. The primary frequency modulation intelligent cooperative control system according to claim 1, characterized in that: The frequency modulation closed-loop verification and optimization module includes: The frequency regulation effect verification unit is used to compare the deviation of grid frequency and unit power before and after frequency regulation, and to calculate the frequency regulation response time, regulation accuracy, and pass rate indicators. The parameter iterative optimization unit is used to adaptively optimize control parameters such as valve response coefficient, fuel compensation coefficient, and constraint threshold based on the verification results. The data storage and traceability unit is used to store data, control parameters, and performance indicators for each frequency modulation process, providing data support for subsequent strategy optimization.

Images