CN113725919B - Energy-saving power system for new energy grid-connected power generation and dynamic energy-saving scheduling method - Google Patents
Energy-saving power system for new energy grid-connected power generation and dynamic energy-saving scheduling method Download PDFInfo
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- 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
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/06—Resources, workflows, human or project management; Enterprise or organisation planning; Enterprise or organisation modelling
- G06Q10/063—Operations research, analysis or management
- G06Q10/0631—Resource planning, allocation, distributing or scheduling for enterprises or organisations
- G06Q10/06312—Adjustment or analysis of established resource schedule, e.g. resource or task levelling, or dynamic rescheduling
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/06—Electricity, gas or water supply
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- 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
- H02J3/381—Dispersed generators
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- 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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
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- 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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- 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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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- 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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
Abstract
The invention discloses an energy-saving power system for grid-connected power generation of new energy, which comprises an energy management system, a module for collecting unit load of the new energy power grid and AGC running state of unit input, a module for judging the time and peak characteristics of the composite peak of the new energy power grid, and a module for measuring and calculating transfer capacity of a power generation side and reaching the standard of the transfer capacity. And finally, the new energy grid-connected power station monitoring index statistical calculation is incorporated together with the collected environmental parameters, namely, the power quality and the power index can be alarmed after out-of-limit, so that the new energy grid-connected power station is comprehensively evaluated, finally, a detection evaluation report of the new energy grid-connected power station is obtained, the effect of being convenient for carrying out dynamic energy-saving scheduling on the new energy grid-connected power generation system is achieved, the fluctuation of the new energy is prevented from excessively influencing the operation mode of the power grid, the power loss of the power grid is reduced, the data support and management level of the dynamic energy-saving scheduling is improved, and the energy efficiency of the power grid is lower.
Description
Technical Field
The invention relates to the technical field of combination of new energy and power technology, in particular to an energy-saving power system for grid-connected power generation of new energy and a dynamic energy-saving scheduling method.
Background
In the development of new century social economy and the continuous rise of energy demand, the world increases the use of the energy of a sliding room, the depletion of the resources is caused by limited reserves and increasingly aggravated exploitation, the global energy crisis and ecological environment destruction become the problems related to human survival and development, how to save and utilize the energy and improve the utilization efficiency of the energy has become the focus of attention of various countries, wherein the energy problem of the electric power industry is especially prominent, the electric power industry is taken as the national basic industry, is the main primary energy direct utilization industry of China, is also the device-type industry with dense funds, is also the resource-intensive industry, needs to occupy and consume a large amount of resources in construction and production operation no matter whether a power supply or a power grid, the method comprises the steps of land, water resources, environmental capacity, various resources such as coal, petroleum, gas and the like, and the method runs through the whole process of power planning, design and construction to production and operation, is a fundamental guarantee of social economic progress and saving type social construction, is power-saving, firstly adopts a stronger sustainable development policy in the aspect of energy development and utilization from national energy strategy, greatly develops renewable energy, adjusts and optimizes an energy industrial structure, realizes saving in development, secondly improves energy conversion and utilization efficiency, improves energy utilization efficiency in the fields of production, transmission, consumption and the like, and obtains the largest economic and social benefits with the smallest resource consumption. In order to promote the conversion of energy production and consumption forms, the China government is greatly supporting the development of new energy sources such as wind power and the like, and the large-scale grid connection of the new energy sources provides clean energy for users, and meanwhile, the novel energy sources have the characteristics of intermittence and randomness, so that a plurality of problems are brought to the safe and stable operation of a power grid, and the influence on the energy conservation of the power grid is increasingly prominent.
The primary energy utilization rate of the existing power system for grid-connected power generation of new energy is reduced, the power grid-connected and digestion conditions of the new energy are obvious, the utilization rate of the primary energy is low, the grid loss of the power grid is high, large-scale grid-connection of the new energy is realized by adopting a large-scale centralized grid-connection mode, the wind-light-electricity base is built far away from a load center, so that long-distance transmission of electric energy is required, the running mode of the power grid is frequently changed due to fluctuation of the new energy, the grid loss of the power grid is increased, and the energy efficiency of the power grid is low.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an energy-saving power system for new energy grid-connected power generation and a dynamic energy-saving scheduling method, and solves the problems in the background art.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the energy-saving power system for new energy grid-connected power generation comprises the following modules: the system comprises an energy management system, a collection module, an energy management system module and a control system module, wherein the energy management system collects the unit load of a new energy power grid and the AGC running state of unit input, judges the time and peak characteristics of a new energy power grid composite peak, calculates the transfer capacity of a power generation side, calculates the transfer capacity standard reaching state, rapidly interrupts the load side, distributes the transfer capacity to the calculation system and distributes the transfer capacity to the unit input output change, and the collection module is subordinate to the energy management system module;
the energy management system comprises the following management steps:
s1: based on the data of energy, a model is built, basic data of a new energy power distribution network are carded, data objects such as a switch room, a transformer, a public transformer room, a transformation room and a high-voltage room are all included in the basic data category, and modeling is carried out, so that a new energy power distribution network basic data model with uniqueness, expansibility, variability and universality is formed;
s2: the data formed in the step S1 are operated, the technical means such as a distributed message queue, an ETL and an API are adopted to acquire distribution network information and parameters transmitted by a new energy power distribution network electric system at regular time, the system automatically extracts the information and the data, and the body data and the equipment parameters of distribution network equipment are optimized in a structuring mode;
s3: checking the information and the data extracted in the step S2, configuring a checking rule associated with the data model, analyzing the distribution network information and the parameters transmitted by the new energy power distribution network electric system, checking the information and the parameters, and finally conveying the information and the parameters which are not in accordance with the checking, and conveying the information and the parameters to an auditing module;
s4: and then analyzing the information and parameters after the verification by adopting the verification rule associated with the data model in the step S3, objectifying the basic data, and finally acquiring the related electric power capacity information from the new energy power distribution network electric system and the like by extracting the information and the parameters or by a file interaction mode.
Preferably, the energy management system module is connected with the new energy power grid composite peak time and peak feature judging module, the new energy power grid composite peak time and peak feature judging module is connected with the power generation side transfer capacity measuring and calculating module, the power generation side transfer capacity measuring and calculating module is connected with the transfer capacity standard reaching state module, the transfer capacity standard reaching state module is connected with the transfer capacity distribution measuring and calculating system module, and the transfer capacity distribution measuring and calculating system module is connected with the unit distribution output change module.
Preferably, the transfer capacity data of the power generation side input by the transfer capacity standard-reaching state module is measured and calculated, the transfer capacity data is transmitted to the transfer capacity distribution measuring and calculating system module when the transfer capacity standard-reaching state module is reached, and the load side rapid interrupt module is input when the transfer capacity data is not reached, so that the load side rapid interrupt module controls the power generation side transfer capacity to be subjected to the interrupt processing of the measuring and calculating module.
Preferably, the module for changing the output of the unit distribution sends the response information to the energy management system module, and the response information is shared with the unit load running on the new energy power grid and the AGC running state of the unit input.
The dynamic energy-saving scheduling method of the energy-saving power system for the grid-connected power generation of the new energy source comprises a measuring and calculating process and an evaluating process, wherein the measuring and calculating process and the evaluating process comprise the following steps of:
s101: collecting electrical parameters of the new energy grid-connected power station, and identifying and extracting characteristic quantities of the collected electrical parameters;
s102: performing time combination of characteristic quantities on the electrical appliance parameters identified and extracted in the step S101;
s103: collecting environmental parameters of the new energy grid-connected power station, and then carrying out statistics calculation on the electrical parameters which are identified and extracted in the step S101 and the electrical parameters which are subjected to time combination of the characteristic quantity in the step S102 and the collected environmental parameters;
s104: after the data in the step S103 are subjected to statistical calculation, the electric energy quality index reaches a threshold value, and an alarm is given after the electric energy quality index is out of limit; when the power index reaches a threshold value, alarming is carried out after the power index is out of limit; and comprehensively evaluating the new energy grid-connected power station, finally obtaining a detection evaluation report of the new energy grid-connected power station, and carrying out dynamic energy-saving scheduling of the power system through the detection evaluation report.
Preferably, in step S104, the generation of the detection and evaluation report of the new energy grid-connected power station includes an out-of-limit alarm of the power quality index, an out-of-limit alarm of the power index, and a comprehensive evaluation of the new energy grid-connected power station.
Preferably, the system comprises a new energy power station running state evaluation system, wherein the new energy power station running state evaluation system comprises an electric energy index and an electric energy quality index, the electric energy quality index comprises a harmonic index, a voltage quality index, a direct current component and a frequency deviation, and the electric energy index comprises a power generation efficiency, a power factor and an active power change rate.
Preferably, the harmonic indexes comprise even-order current harmonic distortion rate, odd-order current harmonic distortion rate and voltage harmonic distortion rate, and the voltage quality indexes comprise voltage deviation, voltage fluctuation, voltage flash and three-phase voltage unbalance.
Preferably, the process of comprehensive evaluation of the new energy grid-connected power station comprises the following steps:
s201: determining an evaluation index of the new energy grid-connected power station, and grading the evaluation index;
s202: calculating probability distribution of each level corresponding to each index of the new energy grid-connected power station;
s203: calculating expected and variance of probability distribution of each level corresponding to each index of the new energy grid-connected power station, and quantifying the indexes;
s204: quantizing the expected standard value and the standard value of the variance to obtain a quantization index of the evaluation index;
s205: and finally grading the quantized values, so as to evaluate the grade of the running state of the grid-connected new energy power station.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the energy-saving power system for the new energy grid-connected power generation and the dynamic energy-saving scheduling method, the actual test is carried out by the control method provided by the invention, so that the system load peak time is accurately judged, the power adjustment of the power generation side and the load demand side is effectively assisted by a dispatcher, the reliability of the operation process is improved, the active control method provided by the invention is used at the power generation side and the load side when the adjustment capacity of the load peak time group is insufficient, the capacity of transferring the load of the power generation side can be considered, and the power consumption of the load side is selectively and rapidly interrupted, so that the rapid transition power grid load peak process is realized, the effect of improving the primary energy utilization rate of the power system for the new energy grid-connected power generation is achieved, the condition of new energy power grid connection and consumption is greatly relieved, and the grid loss is reduced.
2. According to the energy-saving power system for the new energy grid-connected power generation and the dynamic energy-saving scheduling method, the electrical parameters of the new energy grid-connected power generation are collected, the characteristic quantities of the collected electrical parameters are identified and extracted, the characteristic quantities are combined in time, and finally the collected environmental parameters are incorporated into the statistics and calculation of the monitoring index of the new energy grid-connected power generation together, so that the power quality and the power index can be alarmed after out-of-limit, the new energy grid-connected power generation is comprehensively evaluated, and finally the detection evaluation report of the new energy grid-connected power generation is obtained, the effect of being convenient for carrying out dynamic energy-saving scheduling on the new energy grid-connected power generation is achieved, the fluctuation of the new energy is prevented from excessively influencing the operation mode of the power grid, the network loss of the power grid is reduced, the data support and the management level of the dynamic energy-saving scheduling are improved, and the power grid energy efficiency is lower.
3. According to the energy-saving power system for the new energy grid-connected power generation and the dynamic energy-saving scheduling method, the data model of the energy is built, and the operation, the information and the parameter verification and the analysis of the model data are performed, so that the control capacity of the new energy power distribution network is improved, the intelligent scheduling system of the new energy power distribution network is built, the blind spot problem in the aspect of energy management of the new energy power distribution network is solved, and the automation level of the new energy power distribution network is improved.
Drawings
FIG. 1 is a logical block diagram of a system according to the present invention;
FIG. 2 is a schematic diagram of the measurement and evaluation process of the system of the present invention;
FIG. 3 is a system diagram of a new energy power station operating state evaluation system of the invention;
fig. 4 is a comprehensive evaluation flow chart of the new energy grid-connected power station of the system.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples: referring to fig. 1-4, the energy-saving power system for grid-connected generation of new energy comprises the following modules: the energy management system is used for collecting the unit load of the new energy power grid and the AGC running state of the unit input, judging the time and peak characteristics of the composite peak of the new energy power grid, measuring and calculating the transfer capacity of the power generation side, measuring and calculating the transfer capacity standard reaching state, rapidly interrupting the load side, distributing the transfer capacity to the measuring and calculating system and distributing the output change to the unit, and the collecting module is subordinate to the energy management system module;
the energy management system comprises the following management steps:
s1: based on the data of energy, a model is built, basic data of a new energy power distribution network are carded, data objects such as a switch room, a transformer, a public transformer room, a transformation room and a high-voltage room are all included in the basic data category, and modeling is carried out, so that a new energy power distribution network basic data model with uniqueness, expansibility, variability and universality is formed;
s2: the data formed in the step S1 are operated, the technical means such as a distributed message queue, an ETL and an API are adopted to acquire distribution network information and parameters transmitted by a new energy power distribution network electric system at regular time, the system automatically extracts the information and the data, and the body data and the equipment parameters of distribution network equipment are optimized in a structuring mode;
s3: checking the information and the data extracted in the step S2, configuring a checking rule associated with the data model, analyzing the distribution network information and the parameters transmitted by the new energy power distribution network electric system, checking the information and the parameters, and finally conveying the information and the parameters which are not in accordance with the checking, and conveying the information and the parameters to an auditing module;
s4: and then analyzing the information and parameters after the verification by adopting the verification rule associated with the data model in the step S3, objectifying the basic data, and finally acquiring the related electric power capacity information from the new energy power distribution network electric system and the like by extracting the information and the parameters or by a file interaction mode.
In the invention, an energy management system module is connected with a new energy power grid composite peak time and peak characteristic judging module, the new energy power grid composite peak time and peak characteristic judging module is connected with a power generation side transfer capacity measuring and calculating module, the power generation side transfer capacity is measured and calculated, and a transfer capacity standard state module is connected, the transfer capacity standard state module is connected with a measurement and calculating system module, and the transfer capacity is distributed to the measurement and calculating system module and connected with a unit distribution output change module.
In the invention, the transfer capacity data of the power generation side input by the transfer capacity standard-reaching state module is measured and calculated, the transfer capacity data is transmitted to the transfer capacity distribution measuring and calculating system module when the transfer capacity standard-reaching state module is reached, and the load side quick interrupt module is input when the transfer capacity data is not reached, so that the load side quick interrupt module controls the power generation side transfer capacity to be subjected to the interruption processing of the measuring and calculating module.
In the invention, the response information is transmitted to the energy management system module by the unit distribution input output change module, and the response information is shared with the unit load running on the new energy power grid and the AGC running state input by the unit.
The dynamic energy-saving scheduling method of the energy-saving power system for the new energy grid-connected power generation comprises a measuring and calculating process and an evaluating process, wherein the measuring and calculating process and the evaluating process comprise the following steps of:
s101: collecting electrical parameters of the new energy grid-connected power station, and identifying and extracting characteristic quantities of the collected electrical parameters;
s102: performing time combination of characteristic quantities on the electrical appliance parameters identified and extracted in the step S101;
s103: collecting environmental parameters of the new energy grid-connected power station, and then carrying out statistics calculation on the electrical parameters which are identified and extracted in the step S101 and the electrical parameters which are subjected to time combination of the characteristic quantity in the step S102 and the collected environmental parameters;
s104: after the data in the step S103 are subjected to statistical calculation, the electric energy quality index reaches a threshold value, and an alarm is given after the electric energy quality index is out of limit; when the power index reaches a threshold value, alarming is carried out after the power index is out of limit; and comprehensively evaluating the new energy grid-connected power station, and finally obtaining a detection evaluation report of the new energy grid-connected power station.
In the invention, in step S104, the generation of the detection and evaluation report of the new energy grid-connected power station includes the out-of-limit alarm of the electric energy quality index, the out-of-limit alarm of the power index and the comprehensive evaluation of the new energy grid-connected power station.
The invention comprises a new energy power station running state evaluation system, wherein the new energy power station running state evaluation system comprises an electric energy index and an electric energy quality index, the electric energy quality index comprises a harmonic index, a voltage quality index, a direct current component and a frequency deviation, and the electric energy index comprises a power generation efficiency, a power factor and an active power change rate.
In the invention, the harmonic indexes comprise even-order current harmonic distortion rate, odd-order current harmonic distortion rate and voltage harmonic distortion rate, and the voltage quality indexes comprise voltage deviation, voltage fluctuation, voltage flash and three-phase voltage unbalance.
In the invention, the comprehensive evaluation process of the new energy grid-connected power station comprises the following steps:
s201: determining an evaluation index of the new energy grid-connected power station, and grading the evaluation index;
s202: calculating probability distribution of each level corresponding to each index of the new energy grid-connected power station;
s203: calculating expected and variance of probability distribution of each level corresponding to each index of the new energy grid-connected power station, and quantifying the indexes;
s204: quantizing the expected standard value and the standard value of the variance to obtain a quantization index of the evaluation index;
s205: and finally grading the quantized values, so as to evaluate the grade of the running state of the grid-connected new energy power station.
In summary, the control method provided by the invention is used for carrying out actual test to accurately judge the system load peak time, effectively assisting a dispatcher to carry out power adjustment on the power generation side and the load demand side, improving the reliability of the operation process, the active control method provided by the invention is used at the power generation side and the load side when the adjustment capability of the load peak time group is insufficient, not only considering the load transferring capability of the power generation side, but also selectively and rapidly interrupting the power consumption of the load side, so as to realize the rapid transition power grid load peak process, thereby achieving the effect of improving the primary energy utilization rate of the power system of the new energy grid-connected power generation, greatly relieving the condition of new energy power grid connection and consumption, and reducing the network loss, the electric appliance parameters of the new energy grid-connected power station are collected, the characteristic quantities of the collected electric appliance parameters are identified and extracted, the time combination of the characteristic quantities is carried out, the electric appliance parameters are finally brought into the statistical calculation of the monitoring indexes of the new energy grid-connected power station together with the collected environmental parameters, that is, the electric energy quality and the power indexes can be alarmed after out-of-limit, so that the comprehensive evaluation is carried out on the new energy grid-connected power station, finally, the detection evaluation report of the new energy grid-connected power station is obtained, the effect of being convenient for carrying out dynamic energy-saving scheduling on the new energy grid-connected power generation system is achieved, the fluctuation of the new energy is prevented from excessively influencing the operation mode of the power grid, the network loss of the power grid is reduced, the data support and management level of the dynamic energy-saving scheduling is improved, the energy efficiency of the power grid is lower, and the operation, the information and the parameter verification and analysis of model data are carried out through the establishment of a data model, therefore, the control capability of the new energy power distribution network is improved, an intelligent scheduling system of the new energy power distribution network is built, the blind spot problem in the aspect of energy management of the new energy power distribution network is solved, the automation level of the new energy power distribution network is improved, the problems that the primary energy utilization rate of the existing power system for grid-connected power generation of the new energy is reduced, the grid-connected and the consumption conditions of the new energy power are obvious, the utilization rate of the primary energy is lower, the grid loss of the power grid is higher, the large-scale grid connection of the new energy is realized by adopting a large-scale concentrated grid connection mode, the wind-light-electricity base is built far away from a load center, the electric energy is required to be transmitted remotely, the running mode of the power grid is frequently changed due to the fluctuation of the new energy, the grid loss of the power grid is increased, the energy efficiency of the power grid is lower and the like are solved.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The dynamic energy-saving scheduling method of the energy-saving power system for the new energy grid-connected power generation comprises an energy management system, a collection module for the unit load and the AGC running state of the unit input of the new energy grid operation, a new energy grid composite peak time and peak feature judgment module, a power generation side transfer capacity measurement and calculation system module, a load side quick interruption module, a transfer capacity distribution module, a calculation system module and a unit distribution output change module, wherein the collection module is subordinate to the energy management system module for the unit load and the AGC running state of the unit input of the new energy grid operation;
the energy management system comprises the following management steps:
s1: based on the data of energy, a model is built, basic data of a new energy power distribution network are carded, and a switch house, a transformer, a public transformer house, a transformation house and a high-voltage room data object are all included in the basic data category to be modeled, so that a new energy power distribution network basic data model with uniqueness, expansibility, variability and universality is formed;
s2: the data formed in the step S1 are operated, the distribution network information and parameters transmitted by the new energy power distribution network electric system are obtained at regular time by adopting the distributed message queue, ETL and API technical means, the system automatically extracts the information and the data, and the body data and the equipment parameters of the distribution network equipment are optimized in a structuring mode;
s3: checking the information and the data extracted in the step S2, configuring a checking rule associated with the data model, analyzing the distribution network information and the parameters transmitted by the new energy power distribution network electric system, checking the information and the parameters, and finally conveying the information and the parameters which are not in accordance with the checking, and conveying the information and the parameters to an auditing module;
s4: re-analyzing the information and parameters after the verification by adopting the verification rule associated with the data model in the step S3, objectifying the basic data, and finally acquiring the related electric power capability information from the new energy power distribution network electric system by extracting the information and the parameters or by means of file interaction;
the method is characterized in that: the method comprises a measuring and calculating process and an evaluating process, wherein the measuring and calculating process and the evaluating process comprise the following steps of:
s101: collecting electrical parameters of the new energy grid-connected power station, and identifying and extracting characteristic quantities of the collected electrical parameters;
s102: performing time combination of characteristic quantities on the electrical appliance parameters identified and extracted in the step S101;
s103: collecting environmental parameters of the new energy grid-connected power station, and then carrying out statistics calculation on the electrical parameters which are identified and extracted in the step S101 and the electrical parameters which are subjected to time combination of the characteristic quantity in the step S102 and the collected environmental parameters;
s104: after the data in the step S103 are subjected to statistical calculation, the electric energy quality index reaches a threshold value, and an alarm is given after the electric energy quality index is out of limit; when the power index reaches a threshold value, alarming is carried out after the power index is out of limit; and comprehensively evaluating the new energy grid-connected power station, finally obtaining a detection evaluation report of the new energy grid-connected power station, and carrying out dynamic energy-saving scheduling of the power system through the detection evaluation report.
2. The dynamic energy-saving scheduling method for the energy-saving power system for grid-connected power generation of new energy according to claim 1, wherein the method is characterized by comprising the following steps: the energy management system module is connected with the time and peak characteristic judging module of the new energy power grid composite peak, the time and peak characteristic judging module of the new energy power grid composite peak is connected with the power generation side transfer capacity measuring and calculating module, the power generation side transfer capacity measuring and calculating module is connected with the transfer capacity standard reaching state module, the transfer capacity standard reaching state module is connected with the transfer capacity distribution measuring and calculating system module, and the transfer capacity distribution measuring and calculating system module is connected with the unit distribution output change module.
3. The dynamic energy-saving scheduling method of the energy-saving power system for grid-connected generation of new energy according to claim 1 or 2, characterized by: and the transfer capacity data of the power generation side input by the transfer capacity standard-reaching state module is measured and calculated, the transfer capacity data is transmitted to the measurement and calculation system module when the transfer capacity data reach the standard, and the load side quick interrupt module is input when the transfer capacity data do not reach the standard, so that the load side quick interrupt module controls the power generation side transfer capacity to be subjected to measurement and calculation module interrupt processing.
4. The dynamic energy-saving scheduling method for the energy-saving power system for grid-connected power generation of new energy according to claim 1, wherein the method is characterized by comprising the following steps: the unit distribution input output change module transmits response information to the energy management system module and shares the response information with the unit load running on the new energy power grid and the AGC running state input by the unit.
5. The dynamic energy-saving scheduling method for the energy-saving power system for grid-connected power generation of new energy according to claim 1, wherein the method is characterized by comprising the following steps: in step S104, the generation of the detection and evaluation report of the new energy grid-connected power station includes the out-of-limit alarm of the electric energy quality index and the out-of-limit alarm of the power index, and the comprehensive evaluation of the new energy grid-connected power station.
6. The dynamic energy-saving scheduling method for the energy-saving power system for grid-connected power generation of new energy according to claim 1, wherein the method is characterized by comprising the following steps: the novel energy power station running state evaluation system comprises an electric energy index and an electric energy quality index, wherein the electric energy quality index comprises a harmonic index, a voltage quality index, a direct current component and a frequency deviation, and the electric energy index comprises power generation efficiency, a power factor and an active power change rate.
7. The dynamic energy-saving scheduling method for the energy-saving power system for grid-connected power generation of new energy according to claim 6, wherein the method is characterized by comprising the following steps: the harmonic indexes comprise even-order current harmonic distortion rate, odd-order current harmonic distortion rate and voltage harmonic distortion rate, and the voltage quality indexes comprise voltage deviation, voltage fluctuation, voltage flash and three-phase voltage unbalance.
8. The dynamic energy-saving scheduling method for the energy-saving power system for grid-connected power generation of new energy according to claim 1, wherein the method is characterized by comprising the following steps: the comprehensive evaluation process of the new energy grid-connected power station comprises the following steps of:
s201: determining an evaluation index of the new energy grid-connected power station, and grading the evaluation index;
s202: calculating probability distribution of each level corresponding to each index of the new energy grid-connected power station;
s203: calculating expected and variance of probability distribution of each level corresponding to each index of the new energy grid-connected power station, and quantifying the indexes;
s204: quantizing the expected standard value and the standard value of the variance to obtain a quantization index of the evaluation index;
s205: and finally grading the quantized values, so as to evaluate the grade of the running state of the grid-connected new energy power station.
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