Capacity electricity charge checking and early warning method and system for coal-fired power generation enterprise

Abstract

The invention relates to the technical field of power systems, and discloses a capacity electricity charge assessment early warning method and system for a coal-fired power generation enterprise, and the method comprises the steps: monitoring a plurality of coal yard coal storage state parameters and a plurality of coal bunker coal storage state parameters of a fuel management system in real time, and a plurality of equipment operation state parameters of an equipment management system; whether the multiple coal yard coal storage state parameters meet the coal yard safe operation condition or not, whether the multiple coal bunker coal storage state parameters meet the coal bunker safe operation condition or not and whether the multiple equipment operation state parameters meet the equipment safe operation condition or not are judged; if any coal yard coal storage state parameter does not conform to the coal yard safe operation condition, or any coal bunker coal storage state parameter does not conform to the coal bunker safe operation condition, or any equipment operation state parameter does not conform to the equipment safe operation condition, capacity electricity charge assessment early warning information is output. The limitation that current coal power unit capacity electricity charge assessment factor analysis cannot be tracked in real time is broken through, and a guarantee is provided for capacity electricity charge recovery of power generation enterprises.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power systems, and in particular to a capacity electricity fee assessment and early warning method and system for a coal-fired power generation enterprise. Background Art

[0002] In the new power system, capacity is a systematic commodity that guarantees power supply and the stability of the power system. The power dispatching agency purchases the peak capacity of the units during the peak load period from the public coal-fired units on behalf of users according to the supply and demand of the system, and the purchase cost is shared by industrial and commercial users according to the proportion of electricity consumption. The coal-fired units that obtain capacity benefits need to fulfill their obligations to provide peak regulation capacity. If they cannot provide regulation capacity according to the declared capacity, they need to be assessed. Taking the capacity electricity fee assessment standard of a certain province's coal-fired power units as an example, if the coal-fired power units in operation cannot provide the declared maximum output according to the dispatching instructions (inter-provincial and inter-regional power transmission is carried out according to the contract agreement), the unit will deduct 10% of the capacity electricity fee for the month if it occurs twice in the month, 50% if it occurs three times, and 100% if it occurs four times or more. For coal-fired power units that have all the monthly capacity electricity fees deducted three times in a natural year, their qualification to obtain capacity electricity fees will be revoked. The situation of coal-fired power units failing to meet the maximum output standards shall be recorded by the power grid enterprises on a monthly basis, and the capacity electricity fees shall be deducted accordingly. It can be seen that capacity electricity charges are a huge positive factor for the recovery of fixed assets of enterprises, but under the spot market situation, the fluctuation of unit load scheduling has increased, which is a challenge for the recovery of capacity electricity charges. Therefore, how to avoid the lag in the current assessment and analysis of capacity electricity charges for coal-fired power units and provide a solid guarantee for the recovery of capacity electricity charges for coal-fired power generation enterprises has become an urgent problem to be solved.

[0003] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide a capacity electricity fee assessment and early warning method and system for coal-fired power generation enterprises, aiming to solve the technical problem that the existing technology cannot avoid the lag in the capacity electricity fee assessment and analysis of current coal-fired power units, and provide a solid guarantee for the capacity electricity fee recovery of coal-fired power generation enterprises.

[0005] To achieve the above object, the present invention provides a capacity electricity fee assessment and early warning method for a coal-fired power generation enterprise, the method comprising the following steps:

[0006] Real-time monitoring of coal storage status parameters of multiple coal yards and multiple coal bunkers in the fuel management system and multiple equipment operation status parameters in the equipment management system;

[0007] Determine whether the coal storage status parameters of multiple coal yards meet the safe operation conditions of the coal yards, whether the coal storage status parameters of multiple coal bunkers meet the safe operation conditions of the coal bunkers, and whether the operation status parameters of multiple equipment meet the safe operation conditions of the equipment;

[0008] If the coal storage status parameters of any coal yard do not meet the safe operation conditions of the coal yard, or the coal storage status parameters of any coal bunker do not meet the safe operation conditions of the coal bunker, or any equipment operation status parameters do not meet the safe operation conditions of the equipment, then the capacity electricity fee assessment warning information is output.

[0009] Optionally, the multiple coal yard coal storage status parameters include multiple coal yard coal storage structure parameters and coal storage quantity in the coal yard, and the multiple coal yard coal storage structure parameters include comprehensive calorific value of the coal yard, comprehensive sulfur content of the coal yard and comprehensive volatile matter of the coal yard.

[0010] Optionally, the safe operation conditions of the coal yard are:

[0011] The comprehensive calorific value of the coal yard is greater than or equal to the safe comprehensive calorific value, the comprehensive sulfur content of the coal yard is less than or equal to the safe comprehensive sulfur content, the comprehensive volatile content of the coal yard is within the preset safe volatile content range, and the coal inventory of the coal yard is greater than or equal to the preset safety inventory.

[0012] Optionally, the plurality of coal storage status parameters of the coal bunker include the coal storage quantity of the coal bunker and the coal storage time of the coal type in the coal bunker.

[0013] Optionally, the coal bunker safe operation conditions are:

[0014] The coal storage amount in the coal bunker is greater than or equal to the preset safe coal loading amount and the coal storage time of the coal type in the coal bunker is less than or equal to the preset maximum residence time.

[0015] Optionally, the multiple equipment operating status parameters include multiple coal mill parameters, multiple blower parameters, multiple induced draft fan parameters, multiple primary fan parameters, multiple condensate pump parameters and multiple feed water pump parameters.

[0016] Optionally, the equipment safe operation condition is:

[0017] Multiple coal mill parameters are within the safe operating range of coal mill parameters, multiple blower parameters are within the safe operating range of blower parameters, multiple induced draft fan parameters are within the safe operating range of induced draft fan parameters, multiple primary fan parameters are within the safe operating range of primary fan parameters, multiple condensate pump parameters are within the safe operating range of condensate pump parameters, and multiple feed water pump parameters are within the safe operating range of feed water pump parameters.

[0018] Optionally, the plurality of coal mill parameters include coal mill motor current, motor coil temperature, output, motor bearing temperature, bearing temperature and coal mill bearing temperature;

[0019] Multiple blower parameters include blower motor current, motor coil temperature, motor bearing temperature, blower bearing temperature, blower inlet and outlet pressures, and air flow rate;

[0020] Multiple induced draft fan parameters include induced draft fan motor current, motor coil temperature, motor bearing temperature, fan bearing temperature, fan inlet and outlet pressures and flue gas flow rate;

[0021] Multiple primary fan parameters include primary fan motor current, motor coil temperature, motor bearing temperature, fan bearing temperature, fan inlet and outlet pressures and primary air flow rate;

[0022] Multiple condensate pump parameters include condensate pump motor current, motor coil temperature, motor bearing temperature, pump bearing temperature, pump inlet and outlet pressures and condensate flow rate;

[0023] The multiple feedwater pump parameters include the feedwater pump motor current, motor coil temperature, motor bearing temperature, pump bearing temperature, pump inlet and outlet pressures, and feedwater flow rate.

[0024] Optionally, if any coal storage state parameter of a coal yard does not meet the safe operation conditions of the coal yard, or any coal storage state parameter of a coal bunker does not meet the safe operation conditions of the coal bunker, or any equipment operation state parameter does not meet the safe operation conditions of the equipment, the step of outputting capacity electricity fee assessment warning information includes:

[0025] If any coal storage state parameter of a coal yard does not meet the safe operation conditions of the coal yard, or any coal storage state parameter of a coal bunker does not meet the safe operation conditions of the coal bunker, or any equipment operation state parameter does not meet the safe operation conditions of the equipment, then it is determined whether the actual load of the unit is continuously within the preset instruction load range within the preset time period;

[0026] If it is not continuously within the preset instruction load range, the capacity electricity fee assessment warning information and the reason for the capacity electricity fee assessment warning are output based on the coal yard coal storage status parameters that do not meet the safe operation conditions of the coal yard, and / or the coal storage status parameters of the coal bunker that do not meet the safe operation conditions of the coal bunker, and / or the equipment operation status parameters that do not meet the safe operation conditions of the equipment.

[0027] In addition, to achieve the above purpose, the present invention also proposes a capacity electricity fee assessment and early warning system for coal-fired power generation enterprises, the capacity electricity fee assessment and early warning system for coal-fired power generation enterprises comprising:

[0028] A parameter acquisition module is used to monitor in real time the coal storage status parameters of multiple coal yards and multiple coal bunkers of the fuel management system and the operating status parameters of multiple equipment of the equipment management system;

[0029] The parameter judgment module is used to judge whether the coal storage state parameters of multiple coal yards meet the safe operation conditions of the coal yards, whether the coal storage state parameters of multiple coal bunkers meet the safe operation conditions of the coal bunkers, and whether the operation state parameters of multiple equipment meet the safe operation conditions of the equipment;

[0030] The assessment and early warning module is used to output capacity electricity fee assessment and early warning information if the coal storage status parameters of any coal yard do not meet the safe operation conditions of the coal yard, or the coal storage status parameters of any coal bunker do not meet the safe operation conditions of the coal bunker, or any equipment operation status parameters do not meet the safe operation conditions of the equipment.

[0031] In the present invention, multiple coal yard storage state parameters of the fuel management system, multiple coal bunker storage state parameters, and multiple equipment operation state parameters of the equipment management system are monitored in real time; it is determined whether multiple coal yard storage state parameters meet the safe operation conditions of the coal yard, whether multiple coal bunker storage state parameters meet the safe operation conditions of the coal bunker, and whether multiple equipment operation state parameters meet the safe operation conditions of the equipment; if any coal yard storage state parameter does not meet the safe operation conditions of the coal yard, or any coal bunker storage state parameter does not meet the safe operation conditions of the coal bunker, or any equipment operation state parameter does not meet the safe operation conditions of the equipment, then the capacity electricity fee assessment early warning information is output. By real-time tracking of equipment operation status, coal yard storage status, coal bunker loading status, etc., early warning reminders are issued for factors that may lead to capacity electricity fee assessment, so as to break through the limitation that the current coal-fired power unit capacity electricity fee assessment factor analysis cannot be tracked in real time, bid farewell to the previous manual offline analysis process, and improve the timeliness of data. Furthermore, the reasons for the capacity electricity fee assessment warning can be output based on the coal storage status parameters of the coal yard that do not meet the above-mentioned safe operation conditions, and / or the coal storage status parameters of the coal bunker, and / or the equipment operation status parameters, so as to solve the lag problem of the current monthly assessment and analysis of the capacity electricity fees of coal-fired power units, and achieve the goal of "quantifiable, traceable, and analyzable" analysis of capacity electricity fee assessment factors, providing a solid guarantee for the recovery of capacity electricity fees for coal-fired power generation enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a flow chart of the first embodiment of the capacity electricity fee assessment and early warning method for a coal-fired power generation enterprise of the present invention;

[0033] Figure 2 It is a logical flow diagram of the first embodiment of the capacity electricity fee assessment and early warning method for coal-fired power generation enterprises of the present invention;

[0034] Figure 3 This is a structural block diagram of the first embodiment of the capacity electricity fee assessment and early warning system for coal-fired power generation enterprises of the present invention.

[0035] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0037] The embodiment of the present invention provides a capacity electricity fee assessment and early warning method for a coal-fired power generation enterprise, referring to Figure 1 , Figure 1 It is a flow chart of the first embodiment of the capacity electricity fee assessment and early warning method for coal-fired power generation enterprises of the present invention.

[0038] In this embodiment, the capacity electricity fee assessment and early warning method of the coal-fired power generation enterprise includes the following steps:

[0039] Step S10: real-time monitoring of multiple coal yard storage status parameters of the fuel management system, multiple coal storage status parameters of the coal bunkers, and multiple equipment operation status parameters of the equipment management system;

[0040] In this embodiment, the fuel management system can be used to obtain the parameters involved in the entire fuel management process of the coal-fired power generation enterprise, such as the coal storage state parameters of the coal yard, the coal storage state parameters of the coal bunker, etc., and the equipment management system can be used to obtain the operating state parameters of each equipment involved in the coal-fired power generation enterprise. Among them, the multiple coal yard coal storage state parameters include multiple coal yard coal storage structure parameters and coal storage quantity of the coal yard, and the multiple coal yard coal storage structure parameters include the comprehensive calorific value of the coal yard, the comprehensive sulfur content of the coal yard, and the comprehensive volatile content of the coal yard; the multiple coal bunker coal storage state parameters include the coal storage quantity of the coal bunker and the coal storage time of the coal type in the coal bunker.

[0041] Among them, the multiple equipment operation status parameters include multiple coal mill parameters, multiple blower fan parameters, multiple induced draft fan parameters, multiple primary fan parameters, multiple condensate pump parameters and multiple feed water pump parameters. Multiple coal mill parameters include the motor current, motor coil temperature, output (i.e. coal feed amount), motor bearing temperature, bearing temperature and coal mill bearing temperature of the coal mill; multiple blower parameters include the motor current, motor coil temperature, motor bearing temperature, fan bearing temperature, fan inlet and outlet pressures and air supply flow of the blower; multiple induced draft fan parameters include the motor current, motor coil temperature, motor bearing temperature, fan bearing temperature, fan inlet and outlet pressures and flue gas flow of the induced draft fan; multiple primary fan parameters include the motor current, motor coil temperature, motor bearing temperature, fan bearing temperature, fan inlet and outlet pressures and primary air flow of the primary fan; multiple condensate pump parameters include the motor current, motor coil temperature, motor bearing temperature, pump bearing temperature, pump inlet and outlet pressures and condensate flow of the condensate pump; multiple feed water pump parameters include the motor current, motor coil temperature, motor bearing temperature, pump bearing temperature, pump inlet and outlet pressures and feed water flow of the feed water pump.

[0042] Step S20: determining whether the coal storage state parameters of a plurality of coal yards meet the safe operation conditions of the coal yards, whether the coal storage state parameters of a plurality of coal bunkers meet the safe operation conditions of the coal bunkers, and whether the operation state parameters of a plurality of equipment meet the safe operation conditions of the equipment;

[0043] Reference Figure 2 , Figure 2 The present invention is a schematic diagram of the logic flow involved in the first embodiment of the capacity electricity fee assessment and early warning method for a coal-fired power generation enterprise. Figure 2 In the process of judging whether the coal storage state parameters of multiple coal yards meet the safe operation conditions of the coal yard, it is judged whether the comprehensive calorific value of the coal yard is greater than or equal to the safe comprehensive calorific value, whether the comprehensive sulfur content of the coal yard is less than or equal to the safe comprehensive sulfur content, whether the comprehensive volatile content of the coal yard is within the preset safe volatile content range (the preset safe volatile content range can be set based on the minimum safe volatile content and the maximum safe volatile content), and whether the coal storage quantity of the coal yard is greater than or equal to the preset safe inventory. Among them, the safe comprehensive calorific value, the safe comprehensive sulfur content, the preset safe volatile content range and the preset safe inventory can all be set according to actual needs, and this embodiment is not limited here.

[0044] In a specific implementation, when judging whether the coal storage state parameters of multiple coal bunkers meet the safe operation conditions of the coal bunker, it is judged whether the coal storage amount in the coal bunker is greater than or equal to the preset safe coal loading amount and whether the coal storage time of the coal type in the coal bunker is less than or equal to the preset maximum residence time. Among them, the preset safe coal loading amount and the preset maximum residence time can be set according to actual needs, and this embodiment does not limit this. The coal storage time of the coal type in the coal bunker can be obtained by obtaining the current coal type information of the coal bunker through the fuel management system, and the coal type loading time and the residence time to the current moment are counted.

[0045] In a specific implementation, when judging whether the coal storage state parameters of multiple coal bunkers meet the safe operation conditions of the coal bunkers, it is judged whether the multiple coal mill parameters are all within the safe operation range of the coal mill parameters, whether the multiple blower parameters are all within the safe operation range of the blower parameters, whether the multiple induced draft fan parameters are all within the safe operation range of the induced draft fan parameters, whether the multiple primary fan parameters are all within the safe operation range of the primary fan parameters, whether the multiple condensate pump parameters are all within the safe operation range of the condensate pump parameters, and whether the multiple feed water pump parameters are all within the safe operation range of the feed water pump parameters. Among them, the safe operation range of the coal mill parameters, the safe operation range of the blower parameters, the safe operation range of the induced draft fan parameters, the safe operation range of the primary fan parameters, the safe operation range of the condensate pump parameters, and the safe operation range of the feed water pump parameters can all be set based on the historical coal mill parameter operation range, the historical blower parameter operation range, the historical induced draft fan parameter operation range, the historical primary fan parameter operation range, the historical condensate pump parameter operation range, and the historical feed water pump parameter operation range when each device is stably operating in the historical case library, and this embodiment is not limited here.

[0046] For example, the operation history case library of the Supervisory Information System (SIS) of the coal-fired power generation enterprise can be used to count the operation parameters of all important auxiliary equipment (such as coal mill, blower, induced draft fan, primary fan, condensate pump, feed water pump, etc.) during the historical long-term period (at least one year, including all weather factors), non-maintenance period, and period identified by professionals as normal operation of the unit. Then, during the period, the unit operating load (i.e., the power of the generator set, unit MW) is segmented according to the preset gradient to obtain the upper and lower limits of the operating range of the operating state parameters of the above-mentioned equipment in different load segments (in the specific implementation, the load segment can be subdivided as much as possible, such as, from 30% to 100% load interval, every 5% load rate is segmented) (in the specific implementation, the abnormal points can be removed by removing the upper and lower 5%), and then the parameter safety operating range of each equipment is set based on the upper and lower limits of the operating range of the operating state parameters of each equipment. Among them, the preset gradient and the preset load interval can be set according to actual needs, and this embodiment is not limited here.

[0047] Furthermore, the differences between the operating status parameters of each device and the safe operating range of the parameters of the above-mentioned devices can be compared in real time. If any device exceeds the safe operating range of the parameters of the corresponding device (or exceeds a preset proportion of the safe operating range of the parameters of the device, the preset proportion can be set according to actual needs, such as 110%, which is not limited in this embodiment), it is determined that there is a device with an operating status that does not match the safe operation, that is, there is a device that does not meet the conditions for safe operation of the device.

[0048] In addition, parameters such as equipment operating status parameters and unit operating load can be further added to the SIS and run case library to update the case library of the safe operating range of parameters of each device in real time.

[0049] Step S30: If the coal storage status parameters of any coal yard do not meet the safe operation conditions of the coal yard, or the coal storage status parameters of any coal bunker do not meet the safe operation conditions of the coal bunker, or any equipment operation status parameters do not meet the safe operation conditions of the equipment, then output capacity electricity fee assessment warning information.

[0050] In this embodiment, if the comprehensive calorific value of the coal yard is less than the safe comprehensive calorific value, the comprehensive sulfur content of the coal yard is greater than the safe comprehensive sulfur content, the comprehensive volatile matter of the coal yard exceeds the preset safe volatile matter range (that is, less than the minimum safe volatile matter or greater than the maximum safe volatile matter), and the coal storage in the coal yard is less than any of the preset safety stocks, it is determined that the coal storage status parameters of the coal yard do not meet the safe operation conditions of the coal yard, and capacity electricity fee assessment warning information can be output based on the coal storage status parameters of the coal yard that do not meet the safe operation conditions of the coal yard.

[0051] In this embodiment, if there is any situation in which the coal storage quantity in the coal bunker is less than the preset safe coal loading quantity and the coal storage time of the coal type in the coal bunker is greater than the preset maximum residence time, it is determined that the coal storage status parameters of the coal bunker do not meet the safe operation conditions of the coal bunker, and capacity electricity fee assessment warning information can be output based on the coal storage status parameters of the coal bunker that do not meet the safe operation conditions of the coal bunker.

[0052] In this embodiment, if any coal mill parameter exceeds the safe operating range of coal mill parameters, any blower parameter exceeds the safe operating range of blower parameters, any induced draft fan parameter exceeds the safe operating range of induced draft fan parameters, any primary fan parameter exceeds the safe operating range of primary fan parameters, any condensate pump parameter exceeds the safe operating range of condensate pump parameters, and any feed water pump parameter exceeds the safe operating range of feed water pump parameters, it is determined that the equipment operating status parameters do not meet the equipment safe operating conditions, and capacity electricity fee assessment warning information can be output based on the equipment operating status parameters that do not meet the equipment safe operating conditions.

[0053] In the prior art, when judging the shutdown of the coal mill for maintenance, the coal mill status of the next day is mostly manually reported, which requires manual maintenance; or the equipment operation status management system is connected to issue an alarm when the equipment health is lower than the threshold. In this embodiment, the coal mill current information under the same load output (coal feed for the coal mill) is statistically compared with the historical stable state. If the deviation is too large (generally the current deviation is too large compared to the stable state), it means that the current output of the coal mill has decreased. When the coal mill output drops to the threshold (such as less than 70% of the rated output), it is judged that it cannot run at full load (cannot reach the maximum output reported) at high load, and an alarm can be issued. In addition, the operating current and operating output (such as the inlet and outlet pressure and inlet and outlet flow in the pump) of important auxiliary machines (such as coal mills, blowers, induced draft fans, primary fans, condensate pumps, feed water pumps, etc.) can also be automatically tracked and statistically compared with the historical steady-state database. In the same load segment, if the deviation is too large, an alarm is issued.

[0054] Therefore, by real-time tracking of equipment operating status, coal storage status in the coal yard, coal loading status in the coal bunker, etc., early warning reminders can be issued for factors that may lead to capacity electricity fee assessment, so as to break through the limitation that the current analysis of capacity electricity fee assessment factors of coal-fired power units cannot be tracked in real time, say goodbye to the previous manual offline analysis process, and improve the timeliness of data.

[0055] Furthermore, when any coal storage state parameter of a coal yard does not meet the safe operation conditions of the coal yard, or any coal storage state parameter of a coal bunker does not meet the safe operation conditions of the coal bunker, or any equipment operation state parameter does not meet the safe operation conditions of the equipment, it can also be determined whether the actual load of the unit is continuously within the preset instruction load range within the preset time period; if it is not continuously within the preset instruction load range, then according to the coal storage state parameter of the coal yard that does not meet the safe operation conditions of the coal yard, and / or the coal storage state parameter of the coal bunker that does not meet the safe operation conditions of the coal bunker, and / or the equipment operation state parameter that does not meet the safe operation conditions of the equipment, output the capacity electricity fee assessment warning information and the capacity electricity fee assessment warning reason. Among them, the preset time period can be set according to actual needs, and this embodiment is not limited here. The preset instruction load range can be understood as an instruction issued by the Automatic Generation Control (AGC) system to limit the load range, which is used to adjust the output power of the generator in the power grid to meet the changing power demand and keep the system frequency and the tie line power within the specified range.

[0056] In the specific implementation, two scenarios of unit capacity electricity fee assessment will be involved. One is that the operating unit is unable to provide the declared maximum output according to the dispatch instruction due to its own reasons. For example, if the unit fails to meet the instruction requirements or declare the maximum output continuously within the preset time period (such as within 30 minutes), it is deemed that it cannot provide the declared maximum output according to the dispatch requirements. Among them, the startup process of the generator set is not recorded. Second, if the coal-fired power unit has an unplanned shutdown, a maximum output failure event will be recorded in the month of shutdown; during the critical period of peak summer and winter supply (such as July, August, December, and January), if the unit is unplanned for more than 7 days, one more maximum output failure event will be recorded. When the power load in the province during the non-shutdown period reaches 90% of the maximum load in the same period of the previous year, another maximum output failure event will be recorded. In this embodiment, only the first assessment scenario is subject to assessment electricity fee tracking and cause analysis.

[0057] In this embodiment, the capacity electricity fee assessment is automatically tracked, the AGC instructions and the actual load instructions are followed in real time, and when there is a large deviation in load following, the operating condition is recorded, and an analysis of the reasons for the capacity electricity fee assessment is given, such as whether the standby coal mill is fully open to meet the output at high load (which can be determined based on the coal mill output measurement point); whether oil is added to maintain the load at low load (which can be determined based on the oil gun input signal); whether the coal in the coal bunker meets the requirements during load following (such as high calorific value and low sulfur coal types required for full load, which can be determined based on the dynamics of the coal bunker).

[0058] In the specific implementation, the AGC load command and actual load parameters can be tracked in real time, and then the actual load of the unit can be compared with the command load to determine whether the actual load of the unit continues to exceed the command load range within a preset time period (such as within 30 minutes). The command load range can be set based on the proportion of the command load, such as 95% to 105% of the command load.

[0059] Among them, if the actual load of the unit is continuously within the command load range within the preset time period (such as within 30 minutes), it means that the unit load has met the requirements, and the AGC load command and actual load parameters can continue to be tracked. If the actual load of the unit is continuously not within the command load range within the preset time period (such as within 30 minutes), a capacity assessment alarm will be issued, and the coal yard, coal bunker conditions and operating parameters of each equipment will be tracked at the same time, and the reasons for the assessment will be given. In addition, if the coal yard, coal bunker conditions and operating parameters of each equipment are normal (that is, they all meet the corresponding safe operating conditions), the output is "The unit has a capacity electricity fee assessment, please provide additional assessment reasons", and the reasons for the assessment are recorded.

[0060] For example, the assessment reason may be that the output of the standby coal mill is insufficient at high load, that is, after the standby coal mill is started, the load output of the unit does not meet the instruction requirements or declare the maximum output for 30 consecutive minutes. Among them, the instruction requirements can be obtained through the SIS system; the declared maximum output can be obtained through the system interface, or it can be manually maintained every day. For another example, the assessment reason may be that the oil is not added to maintain the load at low load, that is, at low load (such as the load rate is 30% to 40%), the signal of oil gun input and ignition success is not obtained. For another example, when the instruction requirements are not met for 30 consecutive minutes, the coal yard and coal bunker conditions can be tracked, and the assessment reasons can be given based on any one or more of the parameters of the coal storage structure parameters of the coal yard, the coal storage volume of the coal yard, the coal storage volume of the coal bunker, and the storage time of the coal type in the coal bunker that do not meet the corresponding safe operation conditions.

[0061] As a result, it can automatically track the capacity electricity fee assessment, follow the AGC instructions and actual load instructions in real time, and record the operating conditions in the case of large deviations in load following, and give an analysis of the reasons for the capacity electricity fee assessment, solving the lag problem of the current monthly assessment and analysis of the capacity electricity fee of coal-fired power units, and providing a solid guarantee for the recovery of capacity electricity fees for coal-fired power generation companies. In addition, through assessment factor reminders and assessment factor analysis, the goal of "quantifiable, traceable, and analyzable" capacity electricity fee assessment factor analysis can be achieved, providing real-time data support for the recovery of corporate capacity electricity fees.

[0062] In this embodiment, multiple coal storage status parameters of the coal yard of the fuel management system, multiple coal storage status parameters of the coal bunker, and multiple equipment operation status parameters of the equipment management system are monitored in real time; it is determined whether the coal storage status parameters of the multiple coal yards meet the safe operation conditions of the coal yards, whether the coal storage status parameters of the multiple coal bunkers meet the safe operation conditions of the coal bunkers, and whether the multiple equipment operation status parameters meet the safe operation conditions of the equipment; if any coal storage status parameter of the coal yard does not meet the safe operation conditions of the coal yard, or any coal storage status parameter of the coal bunker does not meet the safe operation conditions of the coal bunker, or any equipment operation status parameter does not meet the safe operation conditions of the equipment, then the capacity electricity fee assessment warning information is output. By real-time tracking of equipment operation status, coal storage status of the coal yard, coal loading status of the coal bunker, etc., early warning reminders are issued for factors that may lead to capacity electricity fee assessment, so as to break through the limitation that the analysis of capacity electricity fee assessment factors of current coal-fired power units cannot be tracked in real time, bid farewell to the previous manual offline analysis process, and improve the timeliness of data. Furthermore, the reasons for the capacity electricity fee assessment warning can be output based on the coal storage status parameters of the coal yard that do not meet the above-mentioned safe operation conditions, and / or the coal storage status parameters of the coal bunker, and / or the equipment operation status parameters, so as to solve the lag problem of the current monthly assessment and analysis of the capacity electricity fees of coal-fired power units, and achieve the goal of "quantifiable, traceable, and analyzable" analysis of capacity electricity fee assessment factors, providing a solid guarantee for the recovery of capacity electricity fees for coal-fired power generation enterprises.

[0063] Reference Figure 3 , Figure 3 This is a structural block diagram of the first embodiment of the capacity electricity fee assessment and early warning system for coal-fired power generation enterprises of the present invention.

[0064] like Figure 3 As shown, the capacity electricity fee assessment and early warning system for coal-fired power generation enterprises proposed in the embodiment of the present invention includes:

[0065] The parameter acquisition module 10 is used to monitor in real time the coal storage status parameters of multiple coal yards and multiple coal storage status parameters of the fuel management system and the multiple equipment operation status parameters of the equipment management system;

[0066] The parameter judgment module 20 is used to judge whether the coal storage state parameters of multiple coal yards meet the safe operation conditions of the coal yards, whether the coal storage state parameters of multiple coal bunkers meet the safe operation conditions of the coal bunkers, and whether the operation state parameters of multiple equipment meet the safe operation conditions of the equipment;

[0067] The assessment and early warning module 30 is used to output capacity electricity fee assessment and early warning information if any coal storage status parameter of the coal yard does not meet the safe operation conditions of the coal yard, or any coal storage status parameter of the coal bunker does not meet the safe operation conditions of the coal bunker, or any equipment operation status parameter does not meet the safe operation conditions of the equipment.

[0068] Optionally, the multiple coal yard coal storage status parameters include multiple coal yard coal storage structure parameters and coal storage quantity in the coal yard, and the multiple coal yard coal storage structure parameters include comprehensive calorific value of the coal yard, comprehensive sulfur content of the coal yard and comprehensive volatile matter of the coal yard.

[0069] Optionally, the safe operation conditions of the coal yard are:

[0070] The comprehensive calorific value of the coal yard is greater than or equal to the safe comprehensive calorific value, the comprehensive sulfur content of the coal yard is less than or equal to the safe comprehensive sulfur content, the comprehensive volatile content of the coal yard is within the preset safe volatile content range, and the coal inventory of the coal yard is greater than or equal to the preset safety inventory.

[0071] Optionally, the plurality of coal storage status parameters of the coal bunker include the coal storage quantity of the coal bunker and the coal storage time of the coal type in the coal bunker.

[0072] Optionally, the coal bunker safe operation conditions are:

[0073] The coal storage amount in the coal bunker is greater than or equal to the preset safe coal loading amount and the coal storage time of the coal type in the coal bunker is less than or equal to the preset maximum residence time.

[0074] Optionally, the multiple equipment operating status parameters include multiple coal mill parameters, multiple blower parameters, multiple induced draft fan parameters, multiple primary fan parameters, multiple condensate pump parameters and multiple feed water pump parameters.

[0075] Optionally, the equipment safe operation condition is:

[0076] Multiple coal mill parameters are within the safe operating range of coal mill parameters, multiple blower parameters are within the safe operating range of blower parameters, multiple induced draft fan parameters are within the safe operating range of induced draft fan parameters, multiple primary fan parameters are within the safe operating range of primary fan parameters, multiple condensate pump parameters are within the safe operating range of condensate pump parameters, and multiple feed water pump parameters are within the safe operating range of feed water pump parameters.

[0077] Optionally, the plurality of coal mill parameters include coal mill motor current, motor coil temperature, output, motor bearing temperature, bearing temperature and coal mill bearing temperature;

[0078] Multiple blower parameters include blower motor current, motor coil temperature, motor bearing temperature, blower bearing temperature, blower inlet and outlet pressures, and air flow rate;

[0079] Multiple induced draft fan parameters include induced draft fan motor current, motor coil temperature, motor bearing temperature, fan bearing temperature, fan inlet and outlet pressures and flue gas flow rate;

[0080] Multiple primary fan parameters include primary fan motor current, motor coil temperature, motor bearing temperature, fan bearing temperature, fan inlet and outlet pressures and primary air flow rate;

[0081] Multiple condensate pump parameters include condensate pump motor current, motor coil temperature, motor bearing temperature, pump bearing temperature, pump inlet and outlet pressures and condensate flow rate;

[0082] The multiple feedwater pump parameters include the feedwater pump motor current, motor coil temperature, motor bearing temperature, pump bearing temperature, pump inlet and outlet pressures, and feedwater flow rate.

[0083] Optionally, the assessment and early warning module 30 is further used to determine whether the actual load of the unit is continuously within the preset instruction load range within a preset period of time if any coal storage state parameter of the coal yard does not meet the safe operation conditions of the coal yard, or any coal storage state parameter of the coal bunker does not meet the safe operation conditions of the coal bunker, or any equipment operation state parameter does not meet the safe operation conditions of the equipment;

[0084] The assessment and warning module 30 is also used to output capacity electricity fee assessment and warning information and reasons for capacity electricity fee assessment and warning based on coal storage status parameters in the coal yard that do not meet the safe operation conditions of the coal yard, and / or coal storage status parameters in the coal bunker that do not meet the safe operation conditions of the coal bunker, and / or equipment operation status parameters that do not meet the safe operation conditions of the equipment if the load is not continuously within the preset instruction range.

[0085] In this embodiment, multiple coal storage status parameters of the coal yard of the fuel management system, multiple coal storage status parameters of the coal bunker, and multiple equipment operation status parameters of the equipment management system are monitored in real time; it is determined whether the coal storage status parameters of the multiple coal yards meet the safe operation conditions of the coal yards, whether the coal storage status parameters of the multiple coal bunkers meet the safe operation conditions of the coal bunkers, and whether the multiple equipment operation status parameters meet the safe operation conditions of the equipment; if any coal storage status parameter of the coal yard does not meet the safe operation conditions of the coal yard, or any coal storage status parameter of the coal bunker does not meet the safe operation conditions of the coal bunker, or any equipment operation status parameter does not meet the safe operation conditions of the equipment, then the capacity electricity fee assessment warning information is output. By real-time tracking of equipment operation status, coal storage status of the coal yard, coal loading status of the coal bunker, etc., early warning reminders are issued for factors that may lead to capacity electricity fee assessment, so as to break through the limitation that the analysis of capacity electricity fee assessment factors of current coal-fired power units cannot be tracked in real time, bid farewell to the previous manual offline analysis process, and improve the timeliness of data. Furthermore, the reasons for the capacity electricity fee assessment warning can be output based on the coal storage status parameters of the coal yard that do not meet the above-mentioned safe operation conditions, and / or the coal storage status parameters of the coal bunker, and / or the equipment operation status parameters, so as to solve the lag problem of the current monthly assessment and analysis of the capacity electricity fees of coal-fired power units, and achieve the goal of "quantifiable, traceable, and analyzable" analysis of capacity electricity fee assessment factors, providing a solid guarantee for the recovery of capacity electricity fees for coal-fired power generation enterprises.

[0086] Other embodiments or specific implementations of the capacity electricity fee assessment and early warning system for coal-fired power generation enterprises of the present invention can refer to the above-mentioned method embodiments, which will not be repeated here.

[0087] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0088] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0089] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory / random access memory, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0090] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A capacity electricity fee assessment and early warning method for a coal-fired power generation enterprise, characterized in that: The capacity electricity fee assessment and early warning method for a coal-fired power generation enterprise comprises the following steps: Real-time monitoring of coal storage status parameters of multiple coal yards and multiple coal bunkers in the fuel management system and multiple equipment operation status parameters in the equipment management system; Determine whether the coal storage status parameters of multiple coal yards meet the safe operation conditions of the coal yards, whether the coal storage status parameters of multiple coal bunkers meet the safe operation conditions of the coal bunkers, and whether the operating status parameters of multiple equipment meet the safe operation conditions of the equipment; If the coal storage status parameters of any coal yard do not meet the safe operation conditions of the coal yard, or the coal storage status parameters of any coal bunker do not meet the safe operation conditions of the coal bunker, or any equipment operation status parameters do not meet the safe operation conditions of the equipment, then the capacity electricity fee assessment warning information is output.

2. The capacity electricity fee assessment and early warning method for coal-fired power generation enterprises according to claim 1, characterized in that: The coal storage status parameters of multiple coal yards include the coal storage structure parameters of multiple coal yards and the coal storage quantity of the coal yards. The coal storage structure parameters of multiple coal yards include the comprehensive calorific value of the coal yard, the comprehensive sulfur content of the coal yard and the comprehensive volatile content of the coal yard.

3. The capacity electricity fee assessment and early warning method for coal-fired power generation enterprises according to claim 2, characterized in that: The safe operation conditions of the coal yard are: The comprehensive calorific value of the coal yard is greater than or equal to the safe comprehensive calorific value, the comprehensive sulfur content of the coal yard is less than or equal to the safe comprehensive sulfur content, the comprehensive volatile matter of the coal yard is within the preset safe volatile matter range, and the coal inventory of the coal yard is greater than or equal to the preset safety inventory.

4. The capacity electricity fee assessment and early warning method for coal-fired power generation enterprises according to claim 1, characterized in that: The coal storage status parameters of the multiple coal bunkers include the coal storage quantity of the coal bunker and the coal storage time of the coal types in the coal bunker.

5. The capacity electricity fee assessment and early warning method for coal-fired power generation enterprises according to claim 4, characterized in that: The safe operation conditions of the coal bunker are: The coal storage amount in the coal bunker is greater than or equal to the preset safe coal loading amount and the coal storage time of the coal type in the coal bunker is less than or equal to the preset maximum residence time.

6. The capacity electricity fee assessment and early warning method for coal-fired power generation enterprises according to claim 1, characterized in that: The multiple equipment operation status parameters include multiple coal mill parameters, multiple blower fan parameters, multiple induced draft fan parameters, multiple primary fan parameters, multiple condensate pump parameters and multiple feed water pump parameters.

7. The capacity electricity fee assessment and early warning method for a coal-fired power generation enterprise as claimed in claim 6, characterized in that: The safe operating conditions of the equipment are: Multiple coal mill parameters are within the safe operating range of coal mill parameters, multiple blower parameters are within the safe operating range of blower parameters, multiple induced draft fan parameters are within the safe operating range of induced draft fan parameters, multiple primary fan parameters are within the safe operating range of primary fan parameters, multiple condensate pump parameters are within the safe operating range of condensate pump parameters, and multiple feed water pump parameters are within the safe operating range of feed water pump parameters.

8. The capacity electricity fee assessment and early warning method for a coal-fired power generation enterprise as claimed in claim 6, characterized in that: A plurality of coal mill parameters include coal mill motor current, motor coil temperature, output, motor bearing temperature, bearing temperature and coal mill bearing temperature; Multiple blower parameters include blower motor current, motor coil temperature, motor bearing temperature, blower bearing temperature, blower inlet and outlet pressures, and air flow rate; Multiple induced draft fan parameters include induced draft fan motor current, motor coil temperature, motor bearing temperature, fan bearing temperature, fan inlet and outlet pressures and flue gas flow rate; Multiple primary fan parameters include primary fan motor current, motor coil temperature, motor bearing temperature, fan bearing temperature, fan inlet and outlet pressures and primary air flow rate; Multiple condensate pump parameters include condensate pump motor current, motor coil temperature, motor bearing temperature, pump bearing temperature, pump inlet and outlet pressures and condensate flow rate; The multiple feedwater pump parameters include the feedwater pump motor current, motor coil temperature, motor bearing temperature, pump bearing temperature, pump inlet and outlet pressures, and feedwater flow rate.

9. The capacity electricity fee assessment and early warning method for a coal-fired power generation enterprise according to claim 1, characterized in that: If any coal storage state parameter of a coal yard does not meet the safe operation conditions of the coal yard, or any coal storage state parameter of a coal bunker does not meet the safe operation conditions of the coal bunker, or any equipment operation state parameter does not meet the safe operation conditions of the equipment, the step of outputting capacity electricity fee assessment warning information includes: If any coal storage state parameter of a coal yard does not meet the safe operation conditions of the coal yard, or any coal storage state parameter of a coal bunker does not meet the safe operation conditions of the coal bunker, or any equipment operation state parameter does not meet the safe operation conditions of the equipment, then it is determined whether the actual load of the unit is continuously within the preset instruction load range within the preset time period; If it is not continuously within the preset instruction load range, the capacity electricity fee assessment warning information and the reason for the capacity electricity fee assessment warning are output based on the coal yard coal storage status parameters that do not meet the safe operation conditions of the coal yard, and / or the coal storage status parameters of the coal bunker that do not meet the safe operation conditions of the coal bunker, and / or the equipment operation status parameters that do not meet the safe operation conditions of the equipment.

10. A capacity electricity fee assessment and early warning system for coal-fired power generation enterprises, characterized in that: The capacity electricity fee assessment and early warning system of the coal-fired power generation enterprise includes: A parameter acquisition module is used to monitor in real time the coal storage status parameters of multiple coal yards and multiple coal bunkers of the fuel management system and the operating status parameters of multiple equipment of the equipment management system; The parameter judgment module is used to judge whether the coal storage state parameters of multiple coal yards meet the safe operation conditions of the coal yards, whether the coal storage state parameters of multiple coal bunkers meet the safe operation conditions of the coal bunkers, and whether the operation state parameters of multiple equipment meet the safe operation conditions of the equipment; The assessment and early warning module is used to output capacity electricity fee assessment and early warning information if the coal storage status parameters of any coal yard do not meet the safe operation conditions of the coal yard, or the coal storage status parameters of any coal bunker do not meet the safe operation conditions of the coal bunker, or any equipment operation status parameters do not meet the safe operation conditions of the equipment.

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