Auxiliary frequency modulation peak shaving method and system of electrode boiler, electronic equipment and medium

Abstract

This application relates to an auxiliary frequency regulation and peak shaving method, system, electronic equipment, and medium for electrode boilers. The method includes: responding to a frequency regulation and peak shaving command from the power grid dispatch center; acquiring first current operating parameters of at least one coal-fired power unit and second current operating parameters of at least one electrode boiler; adjusting the thyristor current of at least one electrode boiler according to an auxiliary frequency regulation mode and performing auxiliary frequency regulation of at least one electrode boiler; and / or adjusting the inner cylinder water level and boiler water conductivity of at least one electrode boiler according to an auxiliary peak shaving mode and performing auxiliary peak shaving of at least one electrode boiler. This application can significantly improve the deep peak shaving capability, auxiliary service dual rules, and primary frequency regulation capability of the unit, changing the existing single application scenario of electrode boilers being used only for heating peak shaving or steam start-up, and realizing their flexible application in multiple scenarios such as deep peak shaving, primary frequency regulation, and AGC auxiliary regulation.

Description

Technical Field

[0001] This application relates to the field of frequency regulation and peak shaving technology for generator sets, and in particular to an auxiliary frequency regulation and peak shaving method, system, electronic equipment and medium for electrode boilers. Background Technology

[0002] With the advancement of new power system construction and the large-scale grid connection of new energy sources such as wind power and photovoltaics, the demand of the power grid for deep peak shaving and auxiliary frequency regulation of coal-fired power units continues to increase. Heating units generally face the rigid constraint of "heat-driven power generation," which limits their peak shaving capacity. Conventional units typically operate at a minimum technical output of 30% to 40% of their rated load, making it difficult to meet the requirements for deep peak shaving.

[0003] In related technologies, power plant electrode boilers are mostly used only for winter heating peak shaving or unit start-up steam supply, and are passively put into use only as auxiliary heating equipment. Traditional steam turbine control valve regulation has mechanical inertia, and the boiler main control has thermal inertia in regulating parameters such as fuel and feedwater.

[0004] However, in related technologies, the application scenarios of electrode boilers in power plants are limited and the equipment utilization rate is low. The primary frequency regulation and AGC regulation of traditional thermal power units rely on the turbine control valve and boiler main control, which have a slow response and insufficient regulation accuracy, making it difficult to meet the target requirements. The rapid regulation capability of electrode boilers is not deeply coupled with the peak shaving and frequency regulation of the unit, and efficient utilization throughout the entire cycle of heating season and non-heating season is not achieved, which urgently needs to be improved. Summary of the Invention

[0005] This application provides an auxiliary frequency regulation and peak shaving method, system, electronic equipment, and medium for electrode boilers to solve the problems in related technologies, such as the limited application scenarios and low equipment utilization of electrode boilers in power plants, the reliance of traditional thermal power units on turbine control valves and boiler main control for primary frequency regulation and AGC regulation, resulting in slow response, insufficient regulation accuracy, difficulty in meeting performance requirements, failure to deeply couple the rapid regulation capability of electrode boilers with unit peak shaving and frequency regulation, and failure to achieve efficient utilization throughout the entire heating and non-heating seasons.

[0006] The first aspect of this application provides an auxiliary frequency regulation and peak shaving method for an electrode boiler, comprising the following steps: in response to a frequency regulation and peak shaving command from the power grid dispatching system, acquiring a first current operating parameter of at least one coal-fired power unit and a second current operating parameter of at least one electrode boiler; based on the frequency regulation and peak shaving command, the first current operating parameter, and the second current operating parameter, detecting whether at least one electrode boiler meets a preset auxiliary frequency regulation and peak shaving condition; in response to at least one electrode boiler meeting the preset auxiliary frequency regulation and peak shaving condition, acquiring an auxiliary frequency regulation mode and an auxiliary peak shaving mode for at least one electrode boiler; adjusting the thyristor current of at least one electrode boiler according to the auxiliary frequency regulation mode to generate an adjusted thyristor current, and performing auxiliary frequency regulation of at least one electrode boiler according to the adjusted thyristor current; and / or adjusting the inner cylinder water level and boiler water conductivity of at least one electrode boiler according to the auxiliary peak shaving mode to generate an adjusted inner cylinder water level and boiler water conductivity, and performing auxiliary peak shaving of at least one electrode boiler according to the adjusted inner cylinder water level and boiler water conductivity.

[0007] Optionally, in one embodiment of this application, the auxiliary frequency regulation of at least one of the electrode boilers based on the adjusted thyristor current includes: controlling the output power of at least one of the electrode boilers based on the adjusted thyristor current; matching the power grid frequency fluctuation state based on the output power; and performing auxiliary frequency regulation of at least one of the electrode boilers based on the power grid frequency fluctuation state.

[0008] Optionally, in one embodiment of this application, the step of adjusting the inner cylinder water level and boiler water conductivity of at least one of the electrode boilers according to the auxiliary peak-shaving mode to generate adjusted inner cylinder water level and boiler water conductivity, and performing auxiliary peak-shaving of at least one of the electrode boilers according to the adjusted inner cylinder water level and boiler water conductivity, includes: adjusting the circulation pump speed of at least one of the electrode boilers according to the auxiliary peak-shaving mode to generate a target circulation pump speed; adjusting the inner cylinder water level of at least one of the electrode boilers according to the target circulation pump speed to generate the adjusted inner cylinder water level; and adjusting the boiler water conductivity to perform auxiliary peak-shaving of at least one of the electrode boilers according to the adjusted inner cylinder water level and boiler water conductivity.

[0009] Optionally, in one embodiment of this application, the step of collecting a first current operating parameter of at least one coal-fired power unit and a second current operating parameter of at least one electrode boiler includes: collecting at least one of the load, main steam pressure, and speed of at least one of the coal-fired power unit, and determining the first current operating parameter based on at least one of the load, the main steam pressure, and the speed; collecting at least one of the water level, conductivity, current, and output of at least one electrode boiler, and determining the second current operating parameter based on at least one of the water level, the conductivity, the current, and the output.

[0010] Optionally, in one embodiment of this application, the step of obtaining the auxiliary frequency regulation mode and auxiliary peak regulation mode of at least one electrode boiler in response to at least one electrode boiler meeting the preset auxiliary frequency regulation and peak regulation conditions includes: in response to at least one electrode boiler meeting the preset auxiliary frequency regulation and peak regulation conditions, determining the adjustment mode of at least one electrode boiler as the auxiliary frequency regulation mode according to the frequency regulation and peak regulation command and the first current operating parameter; and in response to at least one electrode boiler meeting the preset auxiliary frequency regulation and peak regulation conditions, determining the adjustment mode of at least one electrode boiler as the auxiliary peak regulation mode according to the frequency regulation and peak regulation command and the second current operating parameter.

[0011] Optionally, in one embodiment of this application, the method further includes: acquiring the ambient temperature and steam demand of at least one of the electrode boilers, and detecting whether at least one of the electrode boilers is in heating operation condition based on the ambient temperature and the steam demand; in response to at least one of the electrode boilers being in the heating operation condition, controlling at least one of the electrode boilers to supply steam to the heating network and industrial steam network through the heat network interface; otherwise, in response to at least one of the electrode boilers being in the non-heating operation condition, controlling at least one of the electrode boilers to connect the produced steam to the power plant auxiliary steam header through the auxiliary steam header interface to maintain the output of the at least one electrode boiler.

[0012] A second aspect of this application provides an auxiliary frequency regulation and peak shaving system for an electrode boiler, comprising: a data acquisition module, configured to acquire a first current operating parameter of at least one coal-fired power unit and a second current operating parameter of at least one electrode boiler in response to a frequency regulation and peak shaving command from the power grid; a detection module, configured to detect whether at least one electrode boiler meets preset auxiliary frequency regulation and peak shaving conditions based on the frequency regulation and peak shaving command, the first current operating parameter, and the second current operating parameter; an acquisition module, configured to acquire an auxiliary frequency regulation mode and an auxiliary peak shaving mode of at least one electrode boiler in response to at least one electrode boiler meeting the preset auxiliary frequency regulation and peak shaving conditions; and a frequency regulation and peak shaving module, configured to adjust the thyristor current of at least one electrode boiler according to the auxiliary frequency regulation mode, generate an adjusted thyristor current, and perform auxiliary frequency regulation of at least one electrode boiler according to the adjusted thyristor current, and / or adjust the inner cylinder water level and boiler water conductivity of at least one electrode boiler according to the auxiliary peak shaving mode, generate an adjusted inner cylinder water level and boiler water conductivity, and perform auxiliary peak shaving of at least one electrode boiler according to the adjusted inner cylinder water level and boiler water conductivity.

[0013] Optionally, in one embodiment of this application, the frequency modulation and peak shaving module includes: a control unit, configured to control the output power of at least one of the electrode boilers according to the adjusted thyristor current; and an auxiliary frequency modulation unit, configured to match the grid frequency fluctuation state according to the output power and perform auxiliary frequency modulation of at least one of the electrode boilers according to the grid frequency fluctuation state.

[0014] Optionally, in one embodiment of this application, the frequency modulation and peak shaving module includes: an adjustment unit, configured to adjust the circulating pump speed of at least one of the electrode boilers according to the auxiliary peak shaving mode to generate a target circulating pump speed; a generation unit, configured to adjust the inner cylinder water level of at least one of the electrode boilers according to the target circulating pump speed to generate the adjusted inner cylinder water level; and an auxiliary peak shaving unit, configured to adjust the boiler water conductivity to perform auxiliary peak shaving of at least one of the electrode boilers according to the adjusted inner cylinder water level and boiler water conductivity.

[0015] Optionally, in one embodiment of this application, the acquisition module includes: a first acquisition unit, configured to acquire at least one of the load, main steam pressure, and speed of at least one of the coal-fired power unit, and determine the first current operating parameter based on at least one of the load, the main steam pressure, and the speed; and a second acquisition unit, configured to acquire at least one of the water level, conductivity, current, and output of at least one of the electrode boilers, and determine the second current operating parameter based on at least one of the water level, the conductivity, the current, and the output.

[0016] Optionally, in one embodiment of this application, the acquisition module includes: a first determining unit, configured to determine, in response to at least one of the electrode boilers meeting the preset auxiliary frequency regulation and peak shaving conditions, that the adjustment mode of at least one of the electrode boilers is the auxiliary frequency regulation mode according to the frequency regulation and peak shaving command and the first current operating parameter; and a second determining unit, configured to determine, in response to at least one of the electrode boilers meeting the preset auxiliary frequency regulation and peak shaving conditions, that the adjustment mode of at least one of the electrode boilers is the auxiliary peak shaving mode according to the frequency regulation and peak shaving command and the second current operating parameter.

[0017] Optionally, in one embodiment of this application, it further includes: a heating detection module, configured to acquire the ambient temperature and steam demand of at least one of the electrode boilers, and detect whether at least one of the electrode boilers is in heating operation condition based on the ambient temperature and the steam demand; and a control module, configured to control at least one of the electrode boilers to supply steam to the heating network and industrial steam network through the heat network interface in response to at least one of the electrode boilers being in the heating operation condition; otherwise, in response to at least one of the electrode boilers being in the non-heating operation condition, control at least one of the electrode boilers to connect the produced steam to the power plant auxiliary steam header through the auxiliary steam header interface to maintain the output of the at least one electrode boiler.

[0018] A third aspect of this application provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the auxiliary frequency regulation and peak shaving method for an electrode boiler as described in the above embodiments.

[0019] A fourth aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described auxiliary frequency modulation and peak shaving method for an electrode boiler.

[0020] This application embodiment enables electrode boilers to participate in the deep peak shaving and auxiliary frequency regulation functions of coal-fired power units, significantly improving the unit's deep peak shaving capability, auxiliary service dual rules, and primary frequency regulation capability. It changes the existing single application scenario of electrode boilers, which are only used for heating peak shaving or steam start-up, to realize flexible application in multiple scenarios such as deep peak shaving, primary frequency regulation, and AGC auxiliary regulation. It ensures improved unit regulation capability and increased electrode boiler utilization through dual-mode regulation and coordinated control, achieving deep coupling between electrode boiler rapid regulation and unit peak shaving and frequency regulation. Therefore, it solves the problems in related technologies, such as the single application scenario and low equipment utilization of electrode boilers in power plants, the reliance of traditional thermal power unit primary frequency regulation and AGC regulation on turbine control valves and boiler main control, resulting in lag response, insufficient regulation accuracy, and difficulty in meeting performance requirements, and the failure to deeply couple the rapid regulation capability of electrode boilers with unit peak shaving and frequency regulation.

[0021] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a flowchart of an auxiliary frequency modulation and peak shaving method for an electrode boiler according to an embodiment of this application; Figure 2 This is a schematic diagram of the control portion of this application; Figure 3 This is a schematic diagram of the application scheme of this application; Figure 4 This is a schematic diagram of the structure of an auxiliary frequency regulation and peak shaving system for an electrode boiler according to an embodiment of this application; Figure 5 This is a schematic diagram of the structure of an electronic device provided according to an embodiment of this application. Detailed Implementation

[0023] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0024] The auxiliary frequency regulation and peak shaving method, system, electronic equipment, and medium of the electrode boiler according to embodiments of this application are described below with reference to the accompanying drawings. Addressing the issues mentioned in the background art, such as the limited application scenarios and low equipment utilization of electrode boilers in power plants, and the reliance on turbine control valves and boiler main control for primary frequency regulation and AGC regulation in traditional thermal power units, which suffers from lag, insufficient regulation accuracy, and difficulty in meeting performance requirements, this application provides an auxiliary frequency regulation and peak shaving method for electrode boilers. This method allows electrode boilers to participate in the deep peak shaving and auxiliary frequency regulation functions of coal-fired power units, significantly improving the unit's deep peak shaving capability, auxiliary service dual rules, and primary frequency regulation capability. It changes the existing single application scenario of electrode boilers, which are only used for heating peak shaving or steam start-up, enabling flexible application in multiple scenarios such as deep peak shaving, primary frequency regulation, and AGC auxiliary regulation. It ensures improved unit regulation capability and electrode boiler utilization through dual-mode regulation and coordinated control, achieving deep coupling of electrode boiler rapid regulation with unit peak shaving and frequency regulation. This solves the problems in related technologies, such as the limited application scenarios and low equipment utilization of electrode boilers in power plants, the reliance of traditional thermal power units on turbine control valves and boiler main control for primary frequency regulation and AGC regulation, resulting in slow response, insufficient regulation accuracy, difficulty in meeting performance requirements, and failure to deeply couple the rapid regulation capability of electrode boilers with the unit's peak shaving and frequency regulation.

[0025] Before introducing the auxiliary frequency regulation and peak shaving method for electrode boilers of this application, the system of this application is first introduced. The system includes a heating unit and its thermal system, and adds an electrode boiler, a thyristor regulating device, a water level and conductivity regulating module, a collaborative control unit, a heating network interface, an industrial steam supply interface, and an auxiliary steam header interface. The electrode boiler is connected to the heating network, the industrial steam supply user, and the unit's auxiliary steam header respectively. The collaborative control unit is connected to the power grid dispatching system, the unit's DCS (Distributed Control System) system, and the electrode boiler control system.

[0026] The system mainly includes an electrode boiler power supply system (transformer), thyristors, an electrode boiler system, a steam distribution cylinder system, an auxiliary steam header connecting to the pipeline steam supply system, and industrial steam (heating) users. The system primarily comprises coal-fired power units, electrode boilers, thyristor regulating devices, water level and conductivity regulating modules, a heat network interface, a power grid dispatch signal receiving module, and a collaborative control unit. The electrode boiler connects to the power plant's external heating system (including residential heating and industrial steam supply) via the heat network interface, and simultaneously achieves bidirectional flexible output adjustment through the thyristor regulating device and the water level and conductivity regulating module. The collaborative control unit receives peak-shaving and frequency-regulating commands from the power grid dispatch, as well as operating parameters of the coal-fired power units and electrode boilers (such as unit load, main steam pressure, electrode boiler water level, conductivity, and current), enabling coordinated control of both.

[0027] Specifically, Figure 1 This is a flowchart illustrating an auxiliary frequency regulation and peak shaving method for an electrode boiler provided in an embodiment of this application.

[0028] like Figure 1 As shown, the auxiliary frequency regulation and peak shaving method of this electrode boiler includes the following steps: In step S101, in response to the frequency regulation and peak shaving command of the power grid dispatch, the first current operating parameters of at least one coal-fired unit and the second current operating parameters of at least one electrode boiler are collected.

[0029] In actual implementation, the embodiments of this application can issue frequency regulation and peak shaving commands based on power grid dispatch, and collect the operating parameters of at least one coal-fired unit and at least one electrode boiler, thereby providing support for subsequent judgment of operating scenarios and automatic switching of regulation modes.

[0030] The embodiments of this application can comprehensively grasp the system's operating status based on grid commands, key parameters of coal-fired units and electrode boilers, avoid misjudgment of operating conditions caused by single parameter judgment, and thus provide support for subsequent adjustments.

[0031] Optionally, in one embodiment of this application, collecting a first current operating parameter of at least one coal-fired power unit and a second current operating parameter of at least one electrode boiler includes: collecting at least one of the load, main steam pressure, and speed of at least one coal-fired power unit, and determining the first current operating parameter based on at least one of the load, main steam pressure, and speed; collecting at least one of the water level, conductivity, current, and output of at least one electrode boiler, and determining the second current operating parameter based on at least one of the water level, conductivity, current, and output.

[0032] It is understood that the first current operating parameter in the embodiments of this application includes, but is not limited to, load, main steam pressure and speed, etc., and the second current operating parameter includes, but is not limited to, water level, conductivity, current and output, etc.

[0033] In actual implementation, the embodiments of this application can accurately determine the real-time operating status of the unit and boiler sides by selectively collecting key operating parameters of coal-fired power units such as load, main steam pressure and speed, as well as key operating parameters of electrode boilers such as water level, conductivity, current and output. This avoids data redundancy caused by the collection of irrelevant parameters and ensures that the collected parameters are highly matched with subsequent operating condition judgment, mode switching and regulation control. This provides effective and reliable data input for subsequent regulation decisions and ensures the accuracy and effectiveness of regulation actions.

[0034] In step S102, based on the frequency modulation and peak shaving command, the first current operating parameter and the second current operating parameter, it is detected whether at least one electrode boiler meets the preset auxiliary frequency modulation and peak shaving conditions.

[0035] It is understood that the preset auxiliary frequency regulation and peak shaving conditions in the embodiments of this application can be the conditions that the current output of the electrode boiler is in the adjustable range, the equipment is fault-free, and the coal-fired unit has a peak shaving margin or the grid frequency deviation exceeds the allowable range.

[0036] In actual implementation, the embodiments of this application can dynamically determine the operating scenario and automatically switch the adjustment mode based on the frequency regulation and peak shaving instructions of the power grid dispatch, the first current operating parameters of the coal-fired unit and the second current operating parameters of the electrode boiler. During detection, on the one hand, it verifies whether the electrode boiler is in a normal operating condition that can be adjusted, including whether parameters such as water level, conductivity and current are within the safe operating range and whether the equipment has no alarms or lockouts; on the other hand, it verifies whether the coal-fired unit has adjustment space; at the same time, it combines the type of frequency regulation and peak shaving instructions to distinguish the needs of primary frequency regulation, deep peak shaving or AGC auxiliary adjustment, thereby comprehensively determining whether the electrode boiler has the conditions to participate in auxiliary frequency regulation and peak shaving.

[0037] The embodiments of this application can ensure that the auxiliary frequency regulation and peak shaving function is only put into use under the premise that the electrode boiler is safe and available, the unit operating conditions allow, and the grid demand is clear through multi-dimensional and multi-parameter joint verification. This ensures the safety and effectiveness of the regulation action from the source and provides a reliable premise for subsequent mode switching and precise regulation.

[0038] In step S103, in response to at least one electrode boiler meeting the preset auxiliary frequency regulation and peak shaving conditions, the auxiliary frequency regulation mode and auxiliary peak shaving mode of at least one electrode boiler are obtained.

[0039] It is understood that the auxiliary frequency regulation mode in the embodiments of this application can be a fast response mode, that is, the output of the electrode boiler is adjusted in milliseconds by the thyristor current to quickly smooth out grid frequency fluctuations; the auxiliary peak shaving mode can be a conventional regulation mode, that is, the output of the boiler is continuously and linearly adjusted by adjusting the water level in the inner cylinder of the electrode boiler and the conductivity of the boiler water to replace the heating load of the coal-fired unit and achieve deep peak shaving.

[0040] In this embodiment, after the electrode boiler meets the preset auxiliary frequency regulation and peak shaving conditions, it can automatically identify and match the corresponding adjustment mode according to the type of power grid dispatch instruction, the operating status of the coal-fired unit and the current operating condition of the electrode boiler. When a primary frequency regulation or AGC fast adjustment instruction is received, the auxiliary frequency regulation mode is matched; when a deep peak shaving or thermal-electric decoupling instruction is received, the auxiliary peak shaving mode is matched.

[0041] The embodiments of this application can achieve decoupling and independent control of frequency regulation and peak shaving functions through precise pattern matching and classification control, taking into account both heating security and power grid peak shaving needs, and greatly improving the overall system regulation performance and operational flexibility.

[0042] Optionally, in one embodiment of this application, in response to at least one electrode boiler meeting preset auxiliary frequency regulation and peak shaving conditions, obtaining the auxiliary frequency regulation mode and auxiliary peak shaving mode of at least one electrode boiler includes: in response to at least one electrode boiler meeting preset auxiliary frequency regulation and peak shaving conditions, determining the adjustment mode of at least one electrode boiler as auxiliary frequency regulation mode according to the frequency regulation and peak shaving command and the first current operating parameter; in response to at least one electrode boiler meeting preset auxiliary frequency regulation and peak shaving conditions, determining the adjustment mode of at least one electrode boiler as auxiliary peak shaving mode according to the frequency regulation and peak shaving command and the second current operating parameter.

[0043] It is understood that the auxiliary frequency modulation mode in the embodiments of this application can be a primary frequency modulation and AGC auxiliary adjustment mode, i.e., a fast adjustment mode; the auxiliary peak shaving mode can be a deep peak shaving and thermoelectric decoupling operation mode, i.e., a conventional adjustment mode.

[0044] Specifically, in this embodiment, when at least one electrode boiler meets preset auxiliary frequency regulation and peak shaving conditions, the adjustment mode of at least one electrode boiler is determined to be auxiliary frequency regulation mode based on the frequency regulation and peak shaving command and the first current operating parameters. Furthermore, when at least one electrode boiler meets preset auxiliary frequency regulation and peak shaving conditions, the adjustment mode of at least one electrode boiler is determined to be auxiliary peak shaving mode based on the frequency regulation and peak shaving command and the second current operating parameters. In step S104, the thyristor current of at least one electrode boiler is adjusted according to the auxiliary frequency modulation mode to generate the adjusted thyristor current, and the auxiliary frequency modulation of at least one electrode boiler is performed according to the adjusted thyristor current, and / or the inner cylinder water level and boiler water conductivity of at least one electrode boiler are adjusted according to the auxiliary peak shaving mode to generate the adjusted inner cylinder water level and boiler water conductivity, and the auxiliary peak shaving of at least one electrode boiler is performed according to the adjusted inner cylinder water level and boiler water conductivity.

[0045] In practical implementation, this embodiment can control the electrode boiler to switch to a fast regulation mode when the grid frequency fluctuates, a primary frequency regulation command is issued, or when it is necessary to assist in improving the AGC (Automatic Generation Control) regulation characteristics of the thermal power unit. At this time, the electrode boiler switches to a low-output operation state, and its output is precisely controlled through a thyristor regulating device. The thyristor current of at least one electrode boiler is adjusted according to the auxiliary frequency regulation mode to generate a regulated thyristor current. Auxiliary frequency regulation of at least one electrode boiler is then performed based on this regulated thyristor current. The thyristor achieves millisecond-level regulation based on the current signal, resulting in high regulation accuracy and fast response speed. This allows for rapid response to grid frequency fluctuations, compensating for the lag in the primary frequency regulation response of the coal-fired power unit. It ensures that the unit's primary frequency regulation response time is less than 3 seconds and the response time for 90% of the target load is no more than 30 seconds, meeting the grid's primary frequency regulation assessment requirements. Simultaneously, the low-output regulation of the electrode boiler in this mode can assist the AGC regulation of the coal-fired power unit, smoothing out load fluctuations, reducing frequent valve operations, and lowering equipment wear.

[0046] This application allows the coordinated control unit to switch the electrode boiler to conventional regulation mode when the power grid dispatching issues a deep peak shaving command or when the coal-fired power unit needs to operate under thermal-electric decoupling conditions. In this mode, the electrode boiler mainly undertakes the task of external heating, and its output is regulated by the water level and conductivity regulation module. According to the auxiliary peak shaving mode, the inner cylinder water level and boiler water conductivity of at least one electrode boiler are regulated to generate the regulated inner cylinder water level and boiler water conductivity. Based on the regulated inner cylinder water level and boiler water conductivity, at least one electrode boiler is used for auxiliary peak shaving. In this mode, the output regulation rate of the electrode boiler is large, which can quickly replace the heating load of the coal-fired power unit, break the rigid constraint of "heat-determined power", release the peak shaving potential of the coal-fired power unit, enable the coal-fired power unit to further reduce the load, break through the existing 30%-40% deep peak shaving limit, and achieve a minimum deep peak shaving of 25% of the rated load.

[0047] The embodiments of this application can achieve thermal-electric decoupling, deep peak shaving, primary frequency regulation and AGC auxiliary regulation through dual-mode regulation and coordinated control, thereby improving the unit's regulation capability and increasing the utilization rate of electrode boilers. By having the electrode boilers participate in the deep peak shaving and auxiliary frequency regulation functions of coal-fired power units, the deep peak shaving capability, auxiliary service dual rules and primary frequency regulation capability of the units are greatly improved, which is of great significance for improving the regulation capability of coal-fired power units and supporting the new power system.

[0048] In this application, during collaborative control, real-time data is collected from power grid dispatch commands, coal-fired power unit operating parameters (load, main steam pressure, speed, etc.), and electrode boiler operating parameters (water level, conductivity, current, output, etc.) to dynamically determine the operating scenario and automatically switch the regulation mode. When both commands occur simultaneously, the primary frequency regulation command is responded to first to ensure power grid frequency stability; when the primary frequency regulation command is released, the system automatically switches back to the conventional regulation mode to ensure a balance between heating demand and deep peak shaving demand.

[0049] Optionally, in one embodiment of this application, auxiliary frequency regulation of at least one electrode boiler based on the adjusted thyristor current includes: controlling the output power of at least one electrode boiler based on the adjusted thyristor current; matching the power grid frequency fluctuation state based on the output power; and performing auxiliary frequency regulation of at least one electrode boiler based on the power grid frequency fluctuation state.

[0050] It is understood that the power grid frequency fluctuation state in the embodiments of this application can be a high-frequency fluctuation state where the power grid frequency is higher than the rated frequency, a low-frequency fluctuation state where the power grid frequency is lower than the rated frequency, and a stable state where the power grid frequency is within the allowable range.

[0051] In actual implementation, such as Figure 2 As shown, the embodiments of this application can perform millisecond-level closed-loop control of the electrode boiler output based on the adjusted thyristor current signal, match the magnitude and direction of the grid frequency deviation in real time, dynamically adjust the boiler output, quickly compensate for the grid active power imbalance, offset the grid active power deficit or surplus, and achieve precise suppression of grid frequency fluctuations.

[0052] The embodiments of this application can perform precise regulation of the thyristor current, realize rapid and continuous controllable output of the electrode boiler, and enable the output of the electrode boiler to be dynamically adjusted in real time according to the current signal, so as to meet the rapid response requirements of power grid frequency fluctuations.

[0053] Optionally, in one embodiment of this application, adjusting the inner cylinder water level and boiler water conductivity of at least one electrode boiler according to an auxiliary peak-shaving mode to generate adjusted inner cylinder water level and boiler water conductivity, and performing auxiliary peak-shaving of at least one electrode boiler according to the adjusted inner cylinder water level and boiler water conductivity, includes: adjusting the circulation pump speed of at least one electrode boiler according to an auxiliary peak-shaving mode to generate a target circulation pump speed; adjusting the inner cylinder water level of at least one electrode boiler according to the target circulation pump speed to generate adjusted inner cylinder water level; and adjusting the boiler water conductivity to perform auxiliary peak-shaving of at least one electrode boiler according to the adjusted inner cylinder water level and boiler water conductivity.

[0054] It is understood that the water level in the inner cylinder of this application embodiment can be the real-time liquid level height inside the inner cylinder of the electrode boiler, used to control the effective heating volume and output level of the boiler; the conductivity of the boiler water can be an indicator of the conductivity of the water in the boiler, used to characterize the salt content of the boiler water, and directly determines the magnitude of the conduction current between the electrodes and the output capacity of the boiler.

[0055] In actual implementation, the embodiments of this application can dynamically adjust the speed of the electrode boiler circulating pump in the auxiliary peak-shaving mode to generate a target circulating pump speed, thereby precisely adjusting the water level in the boiler inner cylinder and changing the electrode immersion depth. At the same time, the chemical dosing device is linked to adjust the conductivity of the boiler water in real time, changing the electrical conductivity of the boiler water. Through the coordinated adjustment of the inner cylinder water level and the conductivity of the boiler water, the output of the electrode boiler can be continuously and linearly changed within the rated range, thereby replacing the coal-fired unit to bear the entire heating load, breaking the rigid constraint of heat-determined power supply, releasing the peak-shaving potential of the coal-fired unit, and realizing deep peak-shaving of the unit.

[0056] This application can significantly improve the regulation performance of coal-fired power units, effectively break through the bottleneck of deep peak shaving in coal-fired power units, reduce the minimum technical output of the unit from 30%-40% to below 25%, and improve the peak shaving depth. At the same time, through millisecond-level rapid adjustment, it improves the primary frequency regulation response characteristics of the unit, and improves the unit's comprehensive frequency regulation performance index (Kp value) to above 3.5, meeting the grid assessment requirements, enhancing the unit's competitiveness in the power auxiliary service market, improving the utilization rate of electrode boilers, and changing the existing single application scenario of electrode boilers only used for heating peak shaving or start-up steam supply, realizing their flexible application in multiple scenarios such as deep peak shaving, primary frequency regulation, and AGC auxiliary regulation, increasing equipment utilization by more than 50%, and fully leveraging its regulation potential.

[0057] Optionally, in one embodiment of this application, the method further includes: acquiring the ambient temperature and steam demand of at least one electrode boiler, and detecting whether at least one electrode boiler is in heating operation condition based on the ambient temperature and steam demand; in response to at least one electrode boiler being in heating operation condition, controlling at least one electrode boiler to supply steam to the heating network and industrial steam network through the heat network interface; otherwise, in response to at least one electrode boiler being in non-heating operation condition, controlling at least one electrode boiler to connect the produced steam to the power plant auxiliary steam header through the auxiliary steam header interface, so as to maintain the output of at least one electrode boiler.

[0058] In this embodiment, when the ambient temperature is low and there is a demand for heating or industrial steam supply, the system is determined to be in heating operation mode. The steam generated by the electrode boiler is preferentially supplied to the heating network and industrial steam supply network through the heat network interface to ensure stable heating for residential use and industrial steam supply. When the ambient temperature is high and there is no demand for heating or industrial steam supply, the system is determined to be in non-heating operation mode. In this embodiment, the steam generated during the non-heating season can be connected to the auxiliary steam header to ensure continuous operation of the system, which is equivalent to the regulation effect of a 3MW-level energy storage system.

[0059] The embodiments of this application realize the efficient utilization of electrode boilers throughout the entire heating and non-heating seasons, avoiding equipment idleness during the non-heating season. By connecting steam to the auxiliary steam header, the reference output of the electrode boiler is maintained, and it continuously participates in primary frequency regulation and AGC auxiliary regulation. Without the need for additional energy storage equipment, it obtains a rapid regulation capability comparable to a small energy storage system, significantly improving the system's economy and regulation flexibility.

[0060] Furthermore, combined Figure 3 The present invention will be further described with reference to specific embodiments.

[0061] like Figure 3 As shown, this embodiment provides an application scheme of the present invention. Taking a 300MW coal-fired power unit participating in deep peak shaving and auxiliary frequency regulation as an example, according to the support functions required by the unit, this application implements the above functions through the following two systems.

[0062] A 300MW coal-fired power unit has completed the retrofitting of a 60MW electrode boiler. The original electrode boiler was only used for residential heating in winter and steam supply during unit startup, resulting in low equipment utilization. The unit's original deep peak-shaving capacity was 35% of rated load, and the primary frequency regulation response time was 5-8 seconds, which is insufficient to meet grid performance requirements. The retrofit will be carried out using the electric boiler-assisted frequency regulation and peak-shaving thermal system proposed in this application. The specific implementation steps are as follows: 1. Basic system configuration and equipment upgrade Main unit and electric boiler configuration: A 300MW-class coal-fired generator set is selected, and a 60MW rated output electrode steam boiler is installed as the core execution equipment for auxiliary frequency regulation and peak shaving.

[0063] Addition of regulating devices: Add water level and conductivity regulating modules to the electrode boiler body, integrating boiler circulating pump and chemical dosing device; simultaneously add thyristor current regulating device, the two regulating modules can be controlled independently and switched as needed.

[0064] Pipeline system connection: Connect the electrode steam boiler heat network interface to the power plant's residential heating network and industrial steam supply network respectively, and reserve the pipeline interface for connecting to the auxiliary steam header to cover the steam consumption needs during the heating season and non-heating season.

[0065] Control system integration: The collaborative control unit is interconnected with the power grid dispatching system, the coal-fired power unit DCS system, and the electrode boiler control system to achieve real-time acquisition and closed-loop control of dispatching commands, operating parameters, and adjustment commands.

[0066] 2. Deep peak shaving thermoelectric decoupling operation mode When the power grid issues a deep peak-shaving command, or when the unit needs to perform thermoelectric decoupling operation, the coordinated control unit automatically switches to the normal regulation mode. The specific operation mode is as follows: The electrode boiler load is controlled by a combination of inner cylinder water level regulation and boiler water conductivity regulation. By adjusting the speed of the boiler circulating pump, the inner cylinder water level is controlled, and the boiler water conductivity is adjusted by the dosing device. This allows for continuous linear regulation of the electrode boiler output within the range of 6MW to 60MW. The electrode boiler fully undertakes the unit's external heating load, completely eliminating the rigid constraint of "heat-based power generation" and releasing the peak-shaving potential of the coal-fired power unit. This enables the 300MW unit to safely operate at 25% of its rated load (75MW) during the heating season, while ensuring the reliability of heating for residential heating and industrial steam supply throughout the entire process.

[0067] 3. Primary frequency regulation and AGC auxiliary regulation operation mode When the generating unit needs to meet the grid's AGC dual-rules assessment or respond to the grid's primary frequency regulation requirements, the coordination control unit switches to a fast adjustment mode. The specific operating mode is as follows: Baseline operating condition: Under normal operating conditions, the electrode boiler maintains a stable output of 3MW, and the output regulation mode is switched to thyristor current regulation.

[0068] Rapid response: When the power grid triggers a frequency regulation command or an AGC rapid load change command, the thyristor can adjust the output in milliseconds based on the current signal, quickly smoothing out power grid frequency fluctuations and compensating for the lag in regulation of coal-fired power units.

[0069] Regulation equivalence: The rapid regulation under the 3MW benchmark output has an effect on improving the AGC response characteristics and primary frequency regulation performance of thermal power units, which is comparable to the regulation benefits of 3MW flywheel energy storage or 3MW electrochemical energy storage.

[0070] Steam utilization: The steam generated during the regulation process is preferentially delivered to heating and heat supply systems and industrial steam users to achieve full utilization of energy.

[0071] 4. System operation guarantee during the non-heating season Even when the unit is in the off-season and there is no demand from industrial steam users, the system can still normally engage its auxiliary frequency regulation and peak shaving functions. Operating mode: The electrode boiler maintains a baseline output of 3MW and continuously participates in primary frequency regulation and AGC auxiliary regulation through thyristor current regulation.

[0072] Steam consumption: The steam generated by the electrode steam boiler is connected to the power plant's auxiliary steam header for auxiliary steam supply to the unit and steam for the plant's public systems, ensuring the continuous and stable operation of the electrode boiler and guaranteeing the system's fault-free commissioning.

[0073] 5. Collaborative Control and Mode Switching Logic Command Priority: The coordinated control unit executes fixed priority control. The primary frequency regulation / AGC regulation command has higher priority than the deep peak shaving thermoelectric decoupling command. When the grid frequency fluctuates, it immediately switches to the fast regulation mode to prioritize grid frequency stability.

[0074] Smooth switching: There is no load or main steam pressure shock during the mode switching process, and the adjustment parameters do not change abruptly. The electrode boiler, coal-fired power unit and heating system operate stably, taking into account grid auxiliary services, unit safety and heating guarantee.

[0075] 6. Performance Peak shaving performance: The minimum load for deep peak shaving of the 300MW unit is reduced to 25% of the rated value, and the peak shaving depth is increased by 10 percentage points compared with that before the retrofit.

[0076] Frequency regulation performance: primary frequency regulation response time ≤ 1s, 90% target load response time ≤ 15s, frequency regulation comprehensive performance index Kp value improved to above 3.7, meeting the power grid assessment requirements.

[0077] Equipment utilization rate: The utilization rate of electrode boilers has increased from 40% to over 85%, resulting in a significant increase in annual revenue from peak shaving and frequency regulation ancillary services.

[0078] The auxiliary frequency regulation and peak shaving method for electrode boilers proposed in this application can significantly improve the deep peak shaving capability, auxiliary service dual rules, and primary frequency regulation capability of coal-fired power units by enabling electrode boilers to participate in the deep peak shaving and auxiliary frequency regulation functions of coal-fired power units. This changes the existing single application scenario of electrode boilers, which are only used for heating peak shaving or starting steam supply, and enables their flexible application in multiple scenarios such as deep peak shaving, primary frequency regulation, and AGC auxiliary regulation. It ensures that the unit's regulation capability is improved through dual-mode regulation and collaborative control, and the utilization rate of electrode boilers is increased. It achieves rapid regulation of electrode boilers and deep coupling with unit peak shaving and frequency regulation. The modification is simple and highly versatile: based on the existing electrode boiler modification foundation of power plants, only the addition of thyristor regulation devices and collaborative control units is required. The modification project is small and the cost is low. There is no need to carry out major modifications to the main equipment of coal-fired power units. It can be widely applied to various coal-fired power units that have completed electrode boiler modification and has strong versatility. This solves the problems in related technologies, such as the limited application scenarios and low equipment utilization of electrode boilers in power plants, the reliance of traditional thermal power units on turbine control valves and boiler main control for primary frequency regulation and AGC regulation, resulting in slow response, insufficient regulation accuracy, and difficulty in meeting performance requirements, and the failure to deeply couple the rapid regulation capability of electrode boilers with the unit's peak shaving and frequency regulation.

[0079] Next, with reference to the accompanying drawings, an auxiliary frequency regulation and peak shaving system for an electrode boiler according to an embodiment of this application is described.

[0080] Figure 4 This is a schematic diagram of the auxiliary frequency regulation and peak shaving system of the electrode boiler according to an embodiment of this application.

[0081] like Figure 4 As shown, the auxiliary frequency regulation and peak shaving system 10 of the electrode boiler includes: a data acquisition module 100, a detection module 200, an acquisition module 300, and a frequency regulation and peak shaving module 400.

[0082] Specifically, the acquisition module 100 is used to acquire the first current operating parameters of at least one coal-fired unit and the second current operating parameters of at least one electrode boiler in response to the frequency regulation and peak shaving command of the power grid dispatch.

[0083] The detection module 200 is used to detect whether at least one electrode boiler meets the preset auxiliary frequency regulation and peak shaving conditions based on the frequency regulation and peak shaving command, the first current operating parameter, and the second current operating parameter.

[0084] The acquisition module 300 is used to acquire the auxiliary frequency regulation mode and auxiliary peak regulation mode of at least one electrode boiler in response to at least one electrode boiler meeting the preset auxiliary frequency regulation and peak regulation conditions.

[0085] The frequency modulation and peak shaving module 400 is used to adjust the thyristor current of at least one electrode boiler according to the auxiliary frequency modulation mode, generate the adjusted thyristor current, and perform auxiliary frequency modulation of at least one electrode boiler according to the adjusted thyristor current, and / or adjust the inner cylinder water level and boiler water conductivity of at least one electrode boiler according to the auxiliary peak shaving mode, generate the adjusted inner cylinder water level and boiler water conductivity, and perform auxiliary peak shaving of at least one electrode boiler according to the adjusted inner cylinder water level and boiler water conductivity.

[0086] Optionally, in one embodiment of this application, the frequency modulation and peak shaving module 400 includes: a control unit and an auxiliary frequency modulation unit.

[0087] The control unit is used to control the output power of at least one electrode boiler based on the adjusted thyristor current.

[0088] The auxiliary frequency regulation unit is used to match the power grid frequency fluctuation state according to the output power and to perform auxiliary frequency regulation of at least one electrode boiler according to the power grid frequency fluctuation state.

[0089] Optionally, in one embodiment of this application, the frequency modulation and peak shaving module 400 includes: an adjustment unit, a generation unit, and an auxiliary peak shaving unit.

[0090] The adjustment unit is used to adjust the circulating pump speed of at least one electrode boiler according to the auxiliary peak shaving mode in order to generate the target circulating pump speed.

[0091] The generation unit is used to adjust the inner cylinder water level of at least one electrode boiler according to the target circulating pump speed, and generate the adjusted inner cylinder water level.

[0092] An auxiliary peak-shaving unit is used to adjust the boiler water conductivity to perform auxiliary peak-shaving for at least one electrode boiler based on the adjusted inner cylinder water level and boiler water conductivity.

[0093] Optionally, in one embodiment of this application, the acquisition module 100 includes: a first acquisition unit and a second acquisition unit.

[0094] The first acquisition unit is used to acquire at least one of the load, main steam pressure and speed of at least one coal-fired unit, and to determine a first current operating parameter based on at least one of the load, main steam pressure and speed.

[0095] The second acquisition unit is used to acquire at least one of the following parameters of at least one electrode boiler: water level, conductivity, current, and output, and to determine a second current operating parameter based on at least one of the following parameters: water level, conductivity, current, and output.

[0096] Optionally, in one embodiment of this application, the acquisition module 300 includes: a first determining unit and a second determining unit.

[0097] The first determining unit is used to determine the adjustment mode of at least one electrode boiler as auxiliary frequency regulation mode in response to at least one electrode boiler meeting the preset auxiliary frequency regulation and peak shaving conditions, based on the frequency regulation and peak shaving command and the first current operating parameters.

[0098] The second determining unit is used to determine the adjustment mode of at least one electrode boiler as auxiliary peak shaving mode in response to at least one electrode boiler meeting the preset auxiliary frequency regulation and peak shaving conditions, based on the frequency regulation and peak shaving command and the second current operating parameters.

[0099] Optionally, in one embodiment of this application, the auxiliary frequency regulation and peak shaving system 10 of the electrode boiler further includes a heating detection module and a control module.

[0100] The heating detection module is used to acquire the ambient temperature and steam demand of at least one electrode boiler, and to detect whether at least one electrode boiler is in heating operation condition based on the ambient temperature and steam demand.

[0101] The control module is used to control at least one electrode boiler to supply steam to the heating network and industrial steam supply network through the heat network interface when at least one electrode boiler is in heating operation; otherwise, in response to at least one electrode boiler being in non-heating operation, it controls at least one electrode boiler to connect the produced steam to the power plant auxiliary steam header through the auxiliary steam header interface to maintain the output of at least one electrode boiler.

[0102] It should be noted that the explanation of the aforementioned embodiment of the auxiliary frequency regulation and peak shaving method for electrode boilers also applies to the auxiliary frequency regulation and peak shaving system of the electrode boiler in this embodiment, and will not be repeated here.

[0103] The auxiliary frequency regulation and peak shaving system for electrode boilers proposed in this application can significantly improve the deep peak shaving capability, auxiliary service dual rules, and primary frequency regulation capability of coal-fired power units by enabling electrode boilers to participate in deep peak shaving and auxiliary frequency regulation functions. This changes the existing single application scenario of electrode boilers, which are only used for heating peak shaving or steam start-up, to flexible application in multiple scenarios such as deep peak shaving, primary frequency regulation, and AGC auxiliary regulation. It ensures improved unit regulation capability and increased electrode boiler utilization through dual-mode regulation and coordinated control, achieving deep coupling between the rapid regulation of electrode boilers and unit peak shaving and frequency regulation. This solves the problems in related technologies, such as the single application scenario and low equipment utilization of electrode boilers in power plants; the reliance of traditional thermal power units on turbine control valves and boiler main control for primary frequency regulation and AGC regulation, resulting in delayed response, insufficient regulation accuracy, and difficulty in meeting performance requirements; and the failure to deeply couple the rapid regulation capability of electrode boilers with unit peak shaving and frequency regulation, thus failing to achieve efficient utilization throughout the entire heating and non-heating seasons.

[0104] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device may include: The memory 501, the processor 502, and the computer program stored on the memory 501 and capable of running on the processor 502.

[0105] When the processor 502 executes the program, it implements the auxiliary frequency modulation and peak shaving method for the electrode boiler provided in the above embodiments.

[0106] Furthermore, electronic devices also include: Communication interface 503 is used for communication between memory 501 and processor 502.

[0107] The memory 501 is used to store computer programs that can run on the processor 502.

[0108] Memory 501 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0109] If the memory 501, processor 502, and communication interface 503 are implemented independently, then the communication interface 503, memory 501, and processor 502 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 5 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0110] Optionally, in a specific implementation, if the memory 501, processor 502, and communication interface 503 are integrated on a single chip, then the memory 501, processor 502, and communication interface 503 can communicate with each other through an internal interface.

[0111] Processor 502 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of this application.

[0112] This embodiment also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described auxiliary frequency modulation and peak shaving method for electrode boilers.

[0113] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0114] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0115] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0116] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0117] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0118] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0119] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0120] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. An auxiliary frequency modulation and peak shaving method for an electrode boiler, characterized in that, Includes the following steps: In response to frequency regulation and peak shaving commands from the power grid dispatch, the system collects the first current operating parameters of at least one coal-fired unit and the second current operating parameters of at least one electrode boiler. Based on the frequency regulation and peak shaving command, the first current operating parameter and the second current operating parameter, detect whether at least one of the electrode boilers meets the preset auxiliary frequency regulation and peak shaving conditions; In response to at least one of the electrode boilers meeting the preset auxiliary frequency regulation and peak shaving conditions, the auxiliary frequency regulation mode and auxiliary peak shaving mode of at least one of the electrode boilers are obtained; The auxiliary frequency modulation mode is used to adjust the thyristor current of at least one of the electrode boilers to generate the adjusted thyristor current, and the auxiliary frequency modulation of at least one of the electrode boilers is performed based on the adjusted thyristor current. And / or, the auxiliary peak shaving mode is used to adjust the inner cylinder water level and boiler water conductivity of at least one of the electrode boilers to generate the adjusted inner cylinder water level and boiler water conductivity, and the auxiliary peak shaving of at least one of the electrode boilers is performed based on the adjusted inner cylinder water level and boiler water conductivity.

2. The method according to claim 1, characterized in that, The auxiliary frequency modulation of at least one of the electrode boilers based on the adjusted thyristor current includes: The output power of at least one of the electrode boilers is controlled according to the adjusted thyristor current. The output power is matched to the grid frequency fluctuation state, and at least one of the electrode boilers is assisted in frequency regulation according to the grid frequency fluctuation state.

3. The method according to claim 1, characterized in that, The step of adjusting the inner cylinder water level and boiler water conductivity of at least one of the electrode boilers according to the auxiliary peak-shaving mode, generating adjusted inner cylinder water level and boiler water conductivity, and performing auxiliary peak-shaving of at least one of the electrode boilers according to the adjusted inner cylinder water level and boiler water conductivity includes: Adjust the circulation pump speed of at least one of the electrode boilers according to the auxiliary peak shaving mode to generate the target circulation pump speed; Adjust the water level in the inner cylinder of at least one of the electrode boilers according to the target circulating pump speed to generate the adjusted water level in the inner cylinder; Adjust the boiler water conductivity to perform auxiliary peak shaving of at least one of the electrode boilers based on the adjusted inner cylinder water level and boiler water conductivity.

4. The method according to claim 1, characterized in that, The acquisition of the first current operating parameters of at least one coal-fired power unit and the second current operating parameters of at least one electrode boiler includes: Collect at least one of the load, main steam pressure, and speed of at least one of the coal-fired power units, and determine the first current operating parameter based on at least one of the load, the main steam pressure, and the speed; The second current operating parameter is determined based on at least one of the water level, conductivity, current, and output of at least one of the electrode boilers.

5. The method according to claim 1, characterized in that, The step of obtaining the auxiliary frequency regulation mode and auxiliary peak shaving mode of at least one of the electrode boilers in response to at least one of the electrode boilers meeting the preset auxiliary frequency regulation and peak shaving conditions includes: In response to at least one of the electrode boilers meeting the preset auxiliary frequency regulation and peak shaving conditions, the adjustment mode of at least one of the electrode boilers is determined to be the auxiliary frequency regulation mode according to the frequency regulation and peak shaving command and the first current operating parameter; In response to at least one of the electrode boilers meeting the preset auxiliary frequency regulation and peak shaving conditions, the adjustment mode of at least one of the electrode boilers is determined to be the auxiliary peak shaving mode based on the frequency regulation and peak shaving command and the second current operating parameters.

6. The method according to claim 1, characterized in that, Also includes: The ambient temperature and steam demand of at least one of the electrode boilers are obtained, and the presence of at least one of the electrode boilers in heating operation is detected based on the ambient temperature and steam demand. In response to at least one of the electrode boilers being in the heating operation condition, control at least one of the electrode boilers to supply steam to the heating network and industrial steam supply network through the heat network interface; otherwise, in response to at least one of the electrode boilers being in the non-heating operation condition, control at least one of the electrode boilers to connect the produced steam to the power plant auxiliary steam header through the auxiliary steam header interface to maintain the output of the at least one electrode boiler.

7. An auxiliary frequency regulation and peak shaving system for an electrode boiler, characterized in that, include: The data acquisition module is used to collect the first current operating parameters of at least one coal-fired unit and the second current operating parameters of at least one electrode boiler in response to the frequency regulation and peak shaving instructions of the power grid dispatch. The detection module is used to detect whether at least one of the electrode boilers meets the preset auxiliary frequency regulation and peak shaving conditions based on the frequency regulation and peak shaving command, the first current operating parameter and the second current operating parameter; The acquisition module is used to acquire the auxiliary frequency regulation mode and auxiliary peak regulation mode of at least one of the electrode boilers in response to at least one of the electrode boilers meeting the preset auxiliary frequency regulation and peak regulation conditions. The frequency modulation and peak shaving module is used to adjust the thyristor current of at least one of the electrode boilers according to the auxiliary frequency modulation mode, generate the adjusted thyristor current, and perform auxiliary frequency modulation of at least one of the electrode boilers according to the adjusted thyristor current, and / or adjust the inner cylinder water level and boiler water conductivity of at least one of the electrode boilers according to the auxiliary peak shaving mode, generate the adjusted inner cylinder water level and boiler water conductivity, and perform auxiliary peak shaving of at least one of the electrode boilers according to the adjusted inner cylinder water level and boiler water conductivity.

8. The system according to claim 7, characterized in that, The frequency modulation and peak shaving module includes: A control unit is used to control the output power of at least one of the electrode boilers according to the adjusted thyristor current. An auxiliary frequency modulation unit is used to match the power grid frequency fluctuation state according to the output power and to perform auxiliary frequency modulation of at least one of the electrode boilers according to the power grid frequency fluctuation state.

9. An electronic device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the auxiliary frequency regulation and peak shaving method for an electrode boiler as described in any one of claims 1-6.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the auxiliary frequency regulation and peak shaving method for the electrode boiler as described in any one of claims 1-6.

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