Power plant two detailed rule frequency modulation on-site analysis method, system, equipment and medium

Abstract

The invention provides a power plant two detailed rule frequency modulation on-site analysis method, system, device and medium, and the method comprises the steps: connecting with a DCS system of a power plant through a sensor and an interface, collecting the frequency modulation data of the power plant, and carrying out the preprocessing; key indexes of frequency modulation performance are extracted from the frequency modulation data by adopting a preset algorithm and a preset model; based on the key indexes, performing frequency modulation performance analysis of the power plant according to the assessment requirements of the two detailed rules; and performing real-time adjustment and control on frequency modulation equipment of the power plant through an interface or a control signal according to a frequency modulation performance analysis result so as to solve the problem that a frequency modulation analysis method focuses on remote monitoring and analysis and has defects in real-time and on-site analysis of a power plant site.

Description

Technical Field

[0001] The present invention relates to the technical field of power plant frequency regulation assistance, and in particular to a method, system, equipment and medium for analyzing two-phase frequency regulation in a power plant. Background Art

[0002] In the power system, frequency is one of the key indicators to measure the quality of power. Stable frequency is essential to ensure the normal operation of power equipment, protect electrical equipment, and ensure the quality of power consumption for users. When the power generation in the power system does not match the load demand, the system frequency will change. If the frequency deviation is too large, it may cause damage to power equipment, malfunction of relay protection, and even cause system collapse. Therefore, the frequency of the power system needs to be strictly controlled to maintain it within the specified range.

[0003] Traditional power system frequency regulation is mainly achieved by the speed regulator of the generator set automatically adjusting the output. However, this method has certain limitations. On the one hand, the response speed of the speed regulator is relatively slow and it is difficult to meet the rapidly changing load demand; on the other hand, the regulation capacity of a single generator set is limited, and it is difficult to cope with sudden power imbalance in large-scale power systems.

[0004] In the power market environment, power plants need to improve their competitiveness to obtain more market share and economic benefits. Frequency regulation performance, as an important indicator of power plants, directly affects the competitiveness of power plants in the power market. Therefore, establishing a scientific and reasonable power plant frequency regulation assessment mechanism will help promote power plants to continuously improve their frequency regulation capabilities and improve the overall operating efficiency of the power system. At present, the frequency regulation assessment management of power plants is mainly based on the "two rules" (i.e., the "Implementation Rules for the Management of Auxiliary Services of Grid-connected Power Plants" and the "Implementation Rules for the Management of Grid-connected Operation of Power Plants"), but the existing frequency regulation analysis methods mostly focus on remote monitoring and analysis, and there are deficiencies in real-time and on-site analysis at the power plant site.

[0005] Therefore, it is urgent to propose an on-site analysis method for the two-step frequency modulation of power plants to solve the technical problem that the existing frequency modulation analysis methods focus more on remote monitoring and analysis and are insufficient for real-time and on-site analysis at power plants. Summary of the invention

[0006] In order to overcome the problems existing in the related art, the present disclosure provides a method, system, equipment and medium for on-site analysis of the two-rule frequency modulation of a power plant, so as to solve the technical problem that the frequency modulation analysis method in the related art focuses more on remote monitoring and analysis, and is insufficient for real-time and on-site analysis at the power plant site.

[0007] One or more embodiments of this specification provide a method for analyzing two frequency modulations in a power plant, including the following steps:

[0008] Connect with the DCS system of the power plant through sensors and interfaces to collect the frequency modulation data of the power plant and perform pre-processing;

[0009] Extracting key indicators of frequency modulation performance from the frequency modulation data using a preset algorithm and model;

[0010] Based on the key indicators, the frequency regulation performance of the power plant is analyzed according to the assessment requirements of the "two detailed rules";

[0011] According to the frequency regulation performance analysis results, the frequency regulation equipment of the power plant is adjusted and controlled in real time through the interface or control signal.

[0012] Preferably, the method further comprises the steps of:

[0013] The frequency modulation performance analysis results are displayed.

[0014] Preferably, the frequency modulation data includes unit output, load instruction, actual load, frequency modulation signal, and frequency modulation power.

[0015] Preferably, the key indicators of the frequency modulation performance include frequency modulation response speed and frequency modulation accuracy.

[0016] One or more embodiments of this specification provide a two-step frequency modulation on-site analysis system for a power plant, including a data acquisition module, an index extraction module, a data analysis module, and a feedback control module;

[0017] The data acquisition module is used to connect to the DCS system of the power plant through sensors and interfaces, collect the frequency modulation data of the power plant and perform preprocessing;

[0018] The index extraction module is used to extract key indexes of frequency modulation performance from the frequency modulation data using a preset algorithm and model;

[0019] The data analysis module is used to analyze the frequency regulation performance of the power plant based on the key indicators and in accordance with the assessment requirements of the "two detailed rules";

[0020] The feedback control module is used to adjust and control the frequency regulation equipment of the power plant in real time through an interface or a control signal according to the frequency regulation performance analysis result.

[0021] Preferably, it also includes a result display module for displaying the frequency modulation performance analysis results.

[0022] Preferably, the frequency modulation data includes unit output, load instruction, actual load, frequency modulation signal, and frequency modulation power.

[0023] Preferably, the key indicators of the frequency modulation performance include frequency modulation response speed and frequency modulation accuracy.

[0024] One or more embodiments of the present specification provide a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned two-step frequency modulation on-site analysis method for a power plant when executing the computer program.

[0025] One or more embodiments of the present specification provide a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the above-mentioned method for on-site analysis of two-rule frequency modulation of a power plant.

[0026] The present disclosure provides a method, system, equipment and medium for on-site analysis of frequency regulation of two rules in a power plant. The advantages are that, by connecting with the DCS system of the power plant through sensors and interfaces, the frequency regulation data of the power plant is collected and preprocessed, so that real-time on-site frequency regulation data acquisition at the power plant site can be realized to ensure the accuracy of the data; the key indicators of frequency regulation performance are extracted from the frequency regulation data by using preset algorithms and models, so as to provide a scientific basis for the frequency regulation assessment and analysis of the power plant; based on the key indicators, the frequency regulation performance of the power plant is analyzed according to the assessment requirements of the "two rules", and the frequency regulation performance indicators of the power plant can be combined with the two rules for analysis, so as to provide a scientific basis for the frequency regulation assessment and analysis of the power plant; according to the frequency regulation performance analysis results, the frequency regulation equipment of the power plant is adjusted and controlled in real time through interfaces or control signals to ensure the stability and optimization of the frequency regulation performance of the power plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate one or more embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1 A schematic flow chart of a method for analyzing two-step frequency modulation in a power plant provided by one or more embodiments of this specification;

[0029] Figure 2 A detailed schematic diagram of collected data provided for one or more embodiments of this specification;

[0030] Figure 3 A schematic diagram showing the analysis results provided for one or more embodiments of this specification;

[0031] Figure 4 A schematic diagram of detailed analysis results provided for one or more embodiments of this specification;

[0032] Figure 5A schematic diagram of platform data flow provided for one or more embodiments of this specification;

[0033] Figure 6 A schematic diagram of a two-step frequency modulation local analysis system for a power plant provided in one or more embodiments of this specification;

[0034] Figure 7 A schematic diagram of the structure of a computer device provided for one or more embodiments of this specification. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solutions in one or more embodiments of this specification, the technical solutions in one or more embodiments of this specification will be clearly and completely described below in conjunction with the drawings in one or more embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on one or more embodiments of this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the protection scope of the present invention.

[0036] The present invention is described in detail below in conjunction with specific implementation methods and the accompanying drawings.

[0037] Method Embodiment

[0038] According to an embodiment of the present invention, a method for analyzing two frequency modulations in situ in a power plant is provided, such as Figure 1 As shown, it is a flow chart of the on-site analysis method of two detailed frequency modulations of a power plant provided in this embodiment. According to the on-site analysis method of two detailed frequency modulations of a power plant according to an embodiment of the present invention, the following steps are included:

[0039] S110, through sensors and interfaces, such as MODBUS interface, connected to the DCS system (Distributed Control System) of the power plant, real-time acquisition of the power plant's frequency modulation data and preliminary data cleaning and verification and other pre-processing, such as Figure 2 As shown, it is a detailed schematic diagram of the collected data provided in this embodiment, which displays the adjustment process in a graphical form, including temperature control signal, MFCLCSO instruction, actual load of the unit, unit frequency regulation power, network load setting, air compressor inlet temperature, primary frequency regulation action signal, and station-end frequency legend dimension.

[0040] S120, deeply analyzing the collected data, using a preset algorithm and model to extract key indicators of frequency modulation performance from the frequency modulation data, such as Figure 3As shown, this is a schematic diagram of the analysis results provided in this embodiment. The analysis results are displayed visually, supporting free query by time dimension and recalculation of data results. The visual display section is divided into adjustment number statistics, data comparison, comprehensive performance overview, latest adjustment overview, assessment and compensation summary, and commissioning overview.

[0041] S130. Based on the key indicators, the frequency regulation performance of the power plant is analyzed according to the assessment requirements of the "two detailed rules", wherein the key indicator algorithms and models of the power plant frequency regulation performance are mainly evaluated around the response speed, accuracy and stability of the power generation unit to the grid frequency regulation.

[0042] The following is a detailed description of these key indicators, algorithms and models, as well as an analysis of frequency modulation performance:

[0043] Key Metrics

[0044] Adjustment rate:

[0045] Definition: The rate at which a power generation unit responds to AGC (Automatic Gain Control) control instructions.

[0046] Algorithm: The evaluation is performed by calculating the ratio (k1) of the measured rate of the power generation unit to the average standard regulation rate of the AGC power generation unit in the frequency regulation resource distribution area. The standard regulation rate is set according to the rated capacity or installed capacity of different types of units (such as coal-fired units, circulating fluidized bed units, gas units, hydropower units, etc.).

[0047] Model: No specific model is required. The k1 value is obtained by calculation and compared with the standard value or threshold.

[0048] Response time:

[0049] Definition: Refers to the time delay of the power generation unit responding to the AGC control command.

[0050] Algorithm: Calculate the delay time between the AGC action of the power generation unit and the power generation unit receiving the AGC command.

[0051] Model: Again, no specific model is required, the response time can be directly measured or calculated.

[0052] Adjustment accuracy:

[0053] Definition: Refers to the accuracy with which the generating unit responds to AGC control instructions.

[0054] Algorithm: The regulation accuracy index is obtained by calculating the ratio of the regulation error of the power generation unit to the allowable regulation error of the power generation unit (k3), and then subtracting the ratio from 1. The regulation error refers to the deviation between the actual output value and the control command value, and the allowable regulation error is the percentage of its rated output.

[0055] Model: Based on the error calculation model, the regulation accuracy of the power generation unit is evaluated.

[0056] Comprehensive frequency modulation performance index (K value):

[0057] Definition: Refers to the comprehensive performance of the power generation unit in response to AGC control instructions.

[0058] Algorithm: Calculated by weighted average method, such as k = 0.25 × (2 × k1 + k2 + k3). Among them, k1, k2, k3 are the index values ​​of adjustment rate, response time, and adjustment accuracy respectively.

[0059] Model: By combining multiple individual indicators, the comprehensive performance index K value is obtained through the weighted average method to comprehensively evaluate the frequency regulation performance of the power generation unit, such as Figure 4 As shown, it is a schematic diagram of the analysis result details provided in this embodiment. The analysis result details are displayed, and it supports free combination query of the analysis result details according to query conditions such as time dimension, unit name, qualification, etc. The displayed content is unit name, instruction issuance time, output at the instruction issuance time, response start time, instruction end time, output at the instruction end time, target output, response time, adjustment accuracy, adjustment time, contribution amount, K1, K2, K3, K, compensation cost (yuan), analysis results, operations, etc.

[0060] S140. According to the frequency regulation performance analysis result, the frequency regulation equipment of the power plant is adjusted and controlled in real time through an interface or a control signal.

[0061] like Figure 5 The figure shows the data flow diagram of the platform provided by this embodiment. The basic operation data of AGC and primary frequency regulation of the DCS system are obtained, and the calculation is performed according to the AGC and primary frequency regulation assessment indicators. The calculation results are analyzed, compared and verified with the AGC assessment compensation data and primary frequency regulation assessment compensation data of the two detailed assessment systems of the city dispatching system, and the information query is published.

[0062] The method provided in this embodiment is connected to the DCS system of the power plant through sensors and interfaces, collects the frequency modulation data of the power plant and performs preprocessing, and can realize the real-time on-site frequency modulation data acquisition at the power plant site to ensure the accuracy of the data; uses preset algorithms and models to extract key indicators of frequency modulation performance from the frequency modulation data to provide a scientific basis for the frequency modulation assessment and analysis of the power plant; based on the key indicators, the frequency modulation performance of the power plant is analyzed according to the assessment requirements of the "two detailed rules", and the frequency modulation performance indicators of the power plant can be combined with the two detailed rules for analysis, providing a scientific basis for the frequency modulation assessment and analysis of the power plant; according to the frequency modulation performance analysis results, the frequency modulation equipment of the power plant is adjusted and controlled in real time through the interface or control signal to ensure the stability and optimization of the frequency modulation performance of the power plant.

[0063] In one embodiment, the method further includes step S150, displaying the frequency regulation performance analysis results, and displaying the analysis results to the power plant staff in an intuitive and easy-to-understand manner such as charts and reports, so as to facilitate them to understand the frequency regulation performance and assessment status of the power plant.

[0064] In one embodiment, the frequency modulation data includes key information such as unit output, load instruction, actual load, frequency modulation signal, frequency modulation power, etc., to ensure the real-time and accuracy of the data.

[0065] In one embodiment, the key indicators of the frequency regulation performance include frequency regulation response speed, frequency regulation accuracy, etc., providing a scientific basis for the frequency regulation assessment and analysis of power plants.

[0066] Table 1 is an analysis report, which uses a visual report format to statistically analyze and present the comparison results between market research and local adjustment data, the statistical results of reasons for unqualified market research and adjustment, and the analysis results of the process of unqualified market research and adjustment. It supports one-click export to a Word file.

[0067] Table 1 Analysis report

[0068]

[0069] System Example

[0070] According to an embodiment of the present invention, a system for analyzing two frequency modulations in situ in a power plant is provided, such as Figure 6 As shown, it is a structural schematic diagram of the on-site analysis system of the two detailed frequency modulation of the power plant provided in this embodiment. The on-site analysis system of the two detailed frequency modulation of the power plant according to the embodiment of the present invention includes a data acquisition module 61, an indicator extraction module 62, a data analysis module 63 and a feedback control module 64.

[0071] The data acquisition module 61 is used to connect to the DCS system of the power plant through sensors and interfaces, collect the frequency modulation data of the power plant and perform pre-processing.

[0072] The indicator extraction module 62 is used to extract key indicators of frequency modulation performance from the frequency modulation data using a preset algorithm and model.

[0073] The data analysis module 63 is used to analyze the frequency regulation performance of the power plant based on the key indicators and in accordance with the assessment requirements of the "two detailed rules".

[0074] The feedback control module 64 is used to adjust and control the frequency regulation equipment of the power plant in real time through an interface or a control signal according to the frequency regulation performance analysis result.

[0075] In the system provided in this embodiment, the data acquisition module 61 has a sensor and an interface connected to the DCS system of the power plant, collects the frequency modulation data of the power plant and performs preprocessing, and can realize the real-time on-site frequency modulation data acquisition at the power plant site to ensure the accuracy of the data; the index extraction module 62 uses a preset algorithm and model to extract the key indicators of frequency modulation performance from the frequency modulation data, providing a scientific basis for the frequency modulation assessment and analysis of the power plant; the data analysis module 63 analyzes the frequency modulation performance of the power plant based on the key indicators and the assessment requirements of the "two detailed rules", and can analyze the frequency modulation performance indicators of the power plant in combination with the two detailed rules, providing a scientific basis for the frequency modulation assessment and analysis of the power plant; the feedback control module 64 adjusts and controls the frequency modulation equipment of the power plant in real time through the interface or control signal according to the frequency modulation performance analysis results to ensure the stability and optimization of the frequency modulation performance of the power plant.

[0076] In one embodiment, a result display module 65 is also included for displaying the frequency regulation performance analysis results, and presenting the analysis results to the power plant staff in an intuitive and easy-to-understand manner such as charts and reports, so as to facilitate them to understand the frequency regulation performance and assessment status of the power plant.

[0077] In one embodiment, the frequency modulation data includes unit output, load instruction, actual load, frequency modulation signal, and frequency modulation power to ensure the real-time and accuracy of the data.

[0078] In one embodiment, the key indicators of the frequency regulation performance include frequency regulation response speed and frequency regulation accuracy, providing a scientific basis for the frequency regulation assessment and analysis of power plants.

[0079] The embodiment of the present invention is a system embodiment corresponding to the above-mentioned method embodiment. The specific operations of the processing steps of each module can be understood by referring to the description of the method embodiment, which will not be repeated here.

[0080] like Figure 7 As shown, the present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the on-site analysis method for the two detailed frequency modulations of a power plant in the above-mentioned embodiment, or, when executed by a processor, implements the on-site analysis method for the two detailed frequency modulations of a power plant in the above-mentioned embodiment.

[0081] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM is available in many forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).

[0082] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. The device and system embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and the contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A method for analyzing two frequency modulations in a power plant, characterized in that: The following steps are involved: Connect with the DCS system of the power plant through sensors and interfaces to collect the frequency modulation data of the power plant and perform pre-processing; Extracting key indicators of frequency modulation performance from the frequency modulation data using a preset algorithm and model; Based on the key indicators, the frequency regulation performance of the power plant is analyzed according to the assessment requirements of the "two detailed rules"; According to the frequency regulation performance analysis results, the frequency regulation equipment of the power plant is adjusted and controlled in real time through the interface or control signal.

2. The method for analyzing the frequency modulation of two power plants in situ according to claim 1 is characterized in that: Also includes the steps: The frequency modulation performance analysis results are displayed.

3. The method for on-site analysis of two frequency modulations in a power plant according to claim 1, characterized in that: The frequency modulation data includes unit output, load instruction, actual load, frequency modulation signal, and frequency modulation power.

4. The method for analyzing the two-phase frequency modulation in a power plant according to claim 1, characterized in that: The key indicators of the frequency modulation performance include frequency modulation response speed and frequency modulation accuracy.

5. A two-step frequency modulation local analysis system for a power plant, characterized in that: It includes data collection module, index extraction module, data analysis module and feedback control module; The data acquisition module is used to connect to the DCS system of the power plant through sensors and interfaces, collect the frequency modulation data of the power plant and perform preprocessing; The index extraction module is used to extract key indexes of frequency modulation performance from the frequency modulation data using a preset algorithm and model; The data analysis module is used to analyze the frequency regulation performance of the power plant based on the key indicators and in accordance with the assessment requirements of the "two detailed rules"; The feedback control module is used to adjust and control the frequency regulation equipment of the power plant in real time through an interface or a control signal according to the frequency regulation performance analysis result.

6. The two-phase frequency modulation local analysis system of a power plant as claimed in claim 5 is characterized in that: It also includes a result display module, which is used to display the frequency modulation performance analysis results.

7. The two-phase frequency modulation local analysis system of a power plant as claimed in claim 5 is characterized in that: The frequency modulation data includes unit output, load instruction, actual load, frequency modulation signal, and frequency modulation power.

8. The two-phase frequency modulation local analysis system of a power plant as claimed in claim 5 is characterized in that: The key indicators of the frequency modulation performance include frequency modulation response speed and frequency modulation accuracy.

9. A computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the on-site analysis method for two-step frequency modulation of a power plant as described in any one of claims 1 to 4 is implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by the processor, the steps of the on-site analysis method for two-step frequency modulation of a power plant as described in any one of claims 1 to 4 are implemented.

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