CN112701734A - AGC instruction intelligent distribution technology for whole plant of thermal power plant - Google Patents

AGC instruction intelligent distribution technology for whole plant of thermal power plant Download PDF

Info

Publication number
CN112701734A
CN112701734A CN202110084780.2A CN202110084780A CN112701734A CN 112701734 A CN112701734 A CN 112701734A CN 202110084780 A CN202110084780 A CN 202110084780A CN 112701734 A CN112701734 A CN 112701734A
Authority
CN
China
Prior art keywords
unit
agc
load
dcs
distribution system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110084780.2A
Other languages
Chinese (zh)
Inventor
郭勇
薛佳
陈明亮
许洪德
郑全
张忠华
孙忠义
宫喜鹏
胡泉
贺志
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yingkou Power Plant of Huaneng Power International Inc
Original Assignee
Yingkou Power Plant of Huaneng Power International Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yingkou Power Plant of Huaneng Power International Inc filed Critical Yingkou Power Plant of Huaneng Power International Inc
Priority to CN202110084780.2A priority Critical patent/CN112701734A/en
Publication of CN112701734A publication Critical patent/CN112701734A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
    • H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

本发明涉及火力发电技术领域，具体涉及一种火力发电厂全厂AGC指令智能分配技术，包括交换机、工程师站和机组DCS，所述交换机为两台，相互构成冗余的环形以太网，控制器为一对，机组DCS为四台，每台所述机组DCS的实时负荷、锅炉MFT、发电机并网状态、汽轮机挂闸状态、AGC投入状态和CCS投入状态信息分别接入AGC指令自动分配系统，AGC指令自动分配系统根据机组DCS出力大小、性能、煤耗、灵活性指标计算出每台机组的AGC指令，分配至单元机组DCS，所述AGC指令自动分配系统包括厂级控制模式和厂级AGC模式。该火力发电厂全厂AGC指令智能分配技术提高了电厂对AGC指令响应的灵活性，充分发挥机组效能,延长设备检修周期，减少机组负荷波动，提升机组整体安全水平。

Figure 202110084780

The invention relates to the technical field of thermal power generation, in particular to an intelligent distribution technology of AGC instructions in the whole plant of a thermal power plant, including a switch, an engineer station and a unit DCS. It is a pair, and there are four DCS units. The real-time load, boiler MFT, generator grid-connected status, steam turbine on-lock status, AGC input status and CCS input status information of each unit DCS are respectively connected to the AGC command automatic distribution system. , the AGC command automatic distribution system calculates the AGC command of each unit according to the unit DCS output, performance, coal consumption, and flexibility indicators, and distributes it to the unit unit DCS. The AGC command automatic distribution system includes plant-level control mode and plant-level AGC model. The intelligent distribution technology of the whole plant AGC command of the thermal power plant improves the flexibility of the power plant to respond to the AGC command, gives full play to the unit efficiency, prolongs the equipment maintenance cycle, reduces the unit load fluctuation, and improves the overall safety level of the unit.

Figure 202110084780

Description

AGC instruction intelligent distribution technology for whole plant of thermal power plant
Technical Field
The invention relates to the technical field of thermal power generation, in particular to an AGC instruction intelligent distribution technology for a whole plant of a thermal power plant.
Background
In the conventional concept, an electric network is taken as an initiator of load demand to directly distribute AGC to unit units, the distribution formula cannot better adapt to the requirement of the current power load flexibility, the construction condition of a multi-source cooperative control system (MEGC) main station and the initial assumption of upgrading an AGC sub-station to an MEGC sub-station are declared in a meeting of 'power plant network source coordination work' by adjusting in 21 Liaoning province in 11 and 21 months in 2019, the traditional AGC distribution mode is that the load demand is directly sent to a single unit, secondary frequency adjustment is carried out collectively along with the requirement of the electric network, AGC takes the plant level as a unit, the electric network only needs to distribute the demand and then carry out secondary frequency adjustment, therefore, an intelligent distribution technology of AGC instructions of a whole thermal power plant is designed, which is urgently needed in the technical field of thermal power generation at present,
disclosure of Invention
The invention provides an AGC instruction intelligent distribution technology for a whole plant of a thermal power plant, which aims to solve the problems in the prior art.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
according to the embodiment of the invention, the intelligent distribution technology of AGC commands of a whole plant of a thermal power plant comprises two switches, two controllers, an operator station, an engineer station and a set DCS, wherein a redundant annular Ethernet is formed by the two switches, one pair of controllers is arranged, the four sets of sets DCS are arranged, the real-time load, the boiler MFT, the generator grid-connected state, the steam turbine hanging gate state, the AGC input state and the CCS input state information of each set of DCS are respectively connected into an AGC command automatic distribution system, the AGC command automatic distribution system calculates the AGC commands of each set of units according to the output power, performance, coal consumption and flexibility indexes of the sets of DCS and distributes the AGC commands to the set DCS, the AGC command automatic distribution system comprises a plant level control mode and a plant level AGC mode, a control station in the plant level control mode is a manual mode, the total load is issued by scheduling and is manually controlled by workers, and then the data is distributed to the unit DCS after being calculated by an AGC instruction automatic distribution system, a control station in a plant-level AGC mode directly receives, schedules and issues a load instruction in an automatic mode, and distributes the load instruction to the unit DCS after being calculated by the AGC instruction automatic distribution system, the plant-level control mode comprises two load distribution strategies of comprehensive coal consumption optimization and distribution according to a functional coefficient, the comprehensive coal consumption optimization considers economic indexes such as coal consumption of each unit DCS, the functional coefficient distribution considers the factors of unit rated output capacity proportion, load limitation, adjusted upper and lower limit capacity and deviation of each unit load instruction, wherein the model expression of load calculation is as follows:
Q＝f(fu,a1)
ai＝f(p,c)
Figure BDA0002910119870000021
wherein Q is an AGC instruction of the unit set, fu is the coal consumption of the unit set, P is the output of the unit set, a1And c is load deviation, automatically fitting a coal consumption characteristic curve of each unit DCS according to the coal consumption values of the four unit DCS at a plurality of load points, and calculating the most economical unit load distribution under each load section of the whole plant.
Further, the AGC command automatic distribution system has a load compensation function.
Furthermore, the automatic AGC instruction distribution system has an output limiting function, the automatic AGC instruction distribution system can prejudge whether the load instruction distributed to the unit set DCS is close to the load limitation of the unit set DCS in the AGC state, and the automatic AGC instruction distribution system can block instruction output when the limitation is reached.
Furthermore, the automatic AGC instruction distribution system has a manual intervention function, and provides a human-computer interface and a corresponding operation function for operators.
The invention has the following advantages:
the AGC instruction intelligent distribution technology for the whole thermal power plant improves the flexibility of the power plant for responding to AGC instructions, fully exerts the unit efficiency, prolongs the equipment maintenance period, reduces the unit load fluctuation, improves the overall safety level of the unit, combines the actual conditions of four units, comprehensively considers a series of factors such as coal consumption, load change rate, economic indexes, auxiliary equipment operation conditions and the like of each unit, intelligently and automatically distributes loads, enables the loads to be always in the optimal economic operation state under the current condition, and reduces the operation cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the functions and purposes of the present invention, should still fall within the scope of the present invention.
Fig. 1 is a schematic diagram of an automatic AGC command distribution system according to the present invention.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship may be made without substantial changes in the technical content.
The invention provides a technical scheme that:
an intelligent AGC instruction distribution technology for a whole plant of a thermal power plant comprises two switches, a controller, an operator station, an engineer station and a unit DCS, wherein the two switches form a redundant annular Ethernet mutually, the controller is a pair, the unit DCS is four, the real-time load, boiler MFT, generator grid-connected state, steam turbine hanging brake state, AGC input state and CCS input state information of each unit DCS are respectively connected into an AGC instruction automatic distribution system, the AGC instruction automatic distribution system calculates an AGC instruction of each unit according to the output power, performance, coal consumption and flexibility indexes of the unit DCS and distributes the AGC instruction to the unit DCS, the AGC instruction automatic distribution system comprises a plant-level control mode and a plant-level AGC mode, a control station in the plant-level control mode is in a manual mode, the total load is issued by scheduling, is manually controlled by a worker, and is distributed to the unit DCS after being calculated by the AGC instruction automatic distribution system, the plant-level AGC mode is characterized in that a control station is in an automatic mode, directly receives, dispatches and issues a load instruction, and distributes the load instruction to the unit DCS after being calculated by an AGC instruction automatic distribution system, the plant-level control mode comprises two load distribution strategies of comprehensive coal consumption optimization and distribution according to functional coefficients, the comprehensive coal consumption optimization considers economic indexes such as coal consumption of each unit DCS, the functional coefficient distribution considers the unit rated output capacity proportion, load limitation, adjusted upper and lower limit capacity and deviation factors of each unit load instruction, and a model expression of load calculation is as follows:
Q＝f(fu,a1)
ai＝f(p,c)
Figure BDA0002910119870000041
wherein Q is an AGC instruction of the unit set, fu is the coal consumption of the unit set, P is the output of the unit set, a1And c is load deviation, automatically fitting a coal consumption characteristic curve of each unit DCS according to the coal consumption values of the four unit DCS at a plurality of load points, and calculating the most economical unit load distribution under each load section of the whole plant.
In the invention: the automatic AGC instruction distribution system has a load compensation function, and can compensate the load difference to other sets of DCS under the condition that the load distribution of the automatic AGC instruction distribution system cannot be achieved in a manual intervention state or due to the set of DCS, so that the deviation of the total load cannot occur.
In the invention: the automatic AGC instruction distribution system has an output limiting function, pre-judges whether a load instruction distributed to the unit set DCS is close to the load limitation of the unit set DCS in an AGC state or not, and locks instruction output when the limitation is reached.
In the invention: the automatic AGC instruction distribution system has a manual intervention function, provides a human-computer interface and a corresponding operation function for operating personnel, generally does not need human intervention, but provides an interface for human intervention, allows the load of the unit DCS to be set manually, can operate at a fixed load for the unit DCS with poor load variation capacity, and allows the unit DCS with strong peak regulation capacity to respond to load variation.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (4)

1.一种火力发电厂全厂AGC指令智能分配技术，包括交换机、控制器、操作员站、工程师站和机组DCS，其特征在于：所述交换机为两台，相互构成冗余的环形以太网，控制器为一对，机组DCS为四台，每台所述机组DCS的实时负荷、锅炉MFT、发电机并网状态、汽轮机挂闸状态、AGC投入状态和CCS投入状态信息分别接入AGC指令自动分配系统，AGC指令自动分配系统根据机组DCS出力大小、性能、煤耗、灵活性指标计算出每台机组的AGC指令，分配至单元机组DCS，所述AGC指令自动分配系统包括厂级控制模式和厂级AGC模式，所述厂级控制模式中控制站为手动方式，总负荷由调度下达，由工作人员手动控制，再经AGC指令自动分配系统计算后分配至机组DCS，所述厂级AGC模式中控制站为自动方式，直接接收调度下发负荷指令，经过AGC指令自动分配系统计算后分配至机组DCS，所述厂级控制模式下包括综合煤耗优化和按照功能系数分配两种负荷分配策略，所述综合煤耗优化考虑各机组DCS的煤耗等经济指标，所述功能系数分配考虑机组额定出力容量比例、负荷限制、调节的上下限容量、各机组负荷指令的偏差因素，其中负荷计算的模型表达式为：1. a thermal power plant whole plant AGC instruction intelligent distribution technology, comprising switch, controller, operator station, engineer station and unit DCS, it is characterized in that: described switch is two, mutually constitutes redundant ring Ethernet , the controller is a pair, the unit DCS is four, and the real-time load, boiler MFT, generator grid connection status, steam turbine on-lock status, AGC input status and CCS input status information of each unit DCS are respectively connected to the AGC command. Automatic distribution system, the AGC command automatic distribution system calculates the AGC command of each unit according to the unit DCS output, performance, coal consumption, and flexibility indicators, and distributes it to the unit unit DCS. The AGC command automatic distribution system includes plant-level control mode and Factory-level AGC mode, the control station in the factory-level control mode is manual, the total load is issued by the dispatcher, manually controlled by the staff, and then distributed to the unit DCS after calculation by the AGC command automatic distribution system, the factory-level AGC mode The central control station is in an automatic mode, directly receiving the dispatching and issuing load commands, and after being calculated by the AGC command automatic distribution system, it is distributed to the unit DCS. The plant-level control mode includes two load distribution strategies: comprehensive coal consumption optimization and distribution according to functional coefficients The comprehensive coal consumption optimization considers economic indicators such as the coal consumption of each unit's DCS, and the function coefficient allocation considers the unit's rated output capacity ratio, load limit, adjusted upper and lower limit capacity, and the deviation factor of each unit's load command. The model expression of the load calculation The formula is: Q＝f(fu,a1)Q=f(fu,a 1 ) ai＝f(p,c)a i =f(p,c)
Figure FDA0002910119860000011
Figure FDA0002910119860000011
 其中，Q为单元机组AGC指令，fu为机组煤耗，P为机组出力，a1为机组功能系数,c为负荷偏差，根据四台机组DCS在多个负荷点的煤耗值，自动拟合出各机组DCS的煤耗特性曲线，计算出全厂各负荷段下最经济的机组负荷分配。Among them, Q is the AGC command of the unit unit, fu is the coal consumption of the unit, P is the output of the unit, a 1 is the function coefficient of the unit, and c is the load deviation. The coal consumption characteristic curve of the DCS of the unit is used to calculate the most economical unit load distribution under each load section of the whole plant. 2.根据权利要求1所述的一种火力发电厂全厂AGC指令智能分配技术，其特征在于：所述AGC指令自动分配系统具有负荷补偿功能。2 . The technology for intelligently distributing AGC commands in the whole plant of a thermal power plant according to claim 1 , wherein the automatic distribution system for AGC commands has a load compensation function. 3 . 3.根据权利要求1所述的一种火力发电厂全厂AGC指令智能分配技术，其特征在于：所述AGC指令自动分配系统具有出力限制功能，AGC指令自动分配系统会预判分配至单元机组DCS的负荷指令是否接近其AGC状态下的负荷限制，在达到限制时AGC指令自动分配系统会闭锁指令输出。3. A kind of thermal power plant whole plant AGC instruction intelligent distribution technology according to claim 1, it is characterized in that: described AGC instruction automatic distribution system has output limit function, AGC instruction automatic distribution system can pre-judgment and distribute to unit unit Whether the load command of the DCS is close to the load limit in its AGC state, when the limit is reached, the AGC command automatic distribution system will block the command output. 4.根据权利要求1所述的一种火力发电厂全厂AGC指令智能分配技术，其特征在于：所述AGC指令自动分配系统具有手动干预功能，AGC指令自动分配系统为运行人员提供了人机界面及相应的操作功能。4. a kind of thermal power plant whole plant AGC instruction intelligent distribution technology according to claim 1, is characterized in that: described AGC instruction automatic distribution system has manual intervention function, AGC instruction automatic distribution system provides man-machine for operator interface and corresponding operation functions.
CN202110084780.2A 2021-01-21 2021-01-21 AGC instruction intelligent distribution technology for whole plant of thermal power plant Pending CN112701734A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110084780.2A CN112701734A (en) 2021-01-21 2021-01-21 AGC instruction intelligent distribution technology for whole plant of thermal power plant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110084780.2A CN112701734A (en) 2021-01-21 2021-01-21 AGC instruction intelligent distribution technology for whole plant of thermal power plant

Publications (1)

Publication Number Publication Date
CN112701734A true CN112701734A (en) 2021-04-23

Family

ID=75515857

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110084780.2A Pending CN112701734A (en) 2021-01-21 2021-01-21 AGC instruction intelligent distribution technology for whole plant of thermal power plant

Country Status (1)

Country Link
CN (1) CN112701734A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103197641A (en) * 2013-03-27 2013-07-10 华北电力大学 Heat-engine plant plant-level load and voltage integrated automatic control system
CN203708286U (en) * 2013-10-22 2014-07-09 中国电力工程顾问集团西南电力设计院 Main and auxiliary control integrated monitoring system of thermal power plate based on plant-level DCS network
CN105098843A (en) * 2015-08-25 2015-11-25 南京南瑞继保电气有限公司 Power plant level automatic power generation control system applied load optimizing and distributing method and system
CN108574304A (en) * 2018-05-04 2018-09-25 华能国际电力股份有限公司海门电厂 A kind of level of factory AGC load optimals logic control method and system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103197641A (en) * 2013-03-27 2013-07-10 华北电力大学 Heat-engine plant plant-level load and voltage integrated automatic control system
CN203708286U (en) * 2013-10-22 2014-07-09 中国电力工程顾问集团西南电力设计院 Main and auxiliary control integrated monitoring system of thermal power plate based on plant-level DCS network
CN105098843A (en) * 2015-08-25 2015-11-25 南京南瑞继保电气有限公司 Power plant level automatic power generation control system applied load optimizing and distributing method and system
CN108574304A (en) * 2018-05-04 2018-09-25 华能国际电力股份有限公司海门电厂 A kind of level of factory AGC load optimals logic control method and system

Similar Documents

Publication Publication Date Title
CN105633949B (en) Economic operation real-time power generation scheduling and control method
CN101552474B (en) AGC hierarchical coordinative control method based on security constraint of stable cross section
CN103036253B (en) Control method of nuclear power plant unit frequency and control system of nuclear power plant unit frequency
CN101777764B (en) Area control deviation and unit generation deviation-based scheduling feedback control system
CN108574304B (en) Plant-level AGC load optimization logic control method and system
CN107423879B (en) A kind of method that controllable burden participates in Automatic Generation Control
US20160301211A1 (en) Multiple renewables site electrical generation and reactive power control
CN105119291B (en) A kind of reactive voltage distributed optimization control system and method
CN102195294B (en) Wind farm reactive comprehensive optimization control method
CN104578187A (en) Multi-terminal flexible direct-current power transmission system-level coordination control device
CN102222914A (en) Electrical telemechanical host with plant-level automatic power generation function
CN113381451B (en) Photovoltaic power station inverter cluster regulation and control method and device
CN106203736B (en) method for making wind-fire island direct-current power transmission plan of large energy base
CN205921397U (en) Microgrid Networking Based on AC Bus
CN102510063B (en) Grading frequency regulation control method of interconnected power grid
CN104638680A (en) Control system for wind power and thermal power combined power generation
CN118469756B (en) Load resource scheduling method, system and medium based on main-allocation coordination
CN110707757A (en) Multi-type energy hierarchical coordination control method based on new energy consumption
CN105006847B (en) The alternating current-direct current association control method and system of alternating current interconnection changed power Comprehensive Control
CN112701734A (en) AGC instruction intelligent distribution technology for whole plant of thermal power plant
CN113131531B (en) Method and system for regulating backup sharing suitable for different operating conditions of power grid
CN108110806B (en) Scheduling method of new energy power system in abnormal regulation and control domain operation mode
CN104967130B (en) AVC control method of networking/isolated network convertible power system
CN104201724B (en) A kind of small hydropower station generator excitation regulating system and method
CN106100141B (en) Power station active power and reactive power automatic control system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20210423

RJ01 Rejection of invention patent application after publication