CN115498640B - Micro-grid energy control method and system based on virtual power plant - Google Patents
Micro-grid energy control method and system based on virtual power plant 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
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J3/0075—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source according to economic or energy efficiency considerations, e.g. economic dispatch
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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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
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
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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
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
- H02J3/0012—Contingency detection
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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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Abstract
The invention provides a virtual power plant-based microgrid energy control method and system, which comprises the following steps: acquiring energy demand information and energy history information, defining the energy demand information and the energy history information as energy information, transmitting the energy information to an information processing module, and performing data analysis processing on the information processing module based on the energy information to extract numerical value information related to the energy information; the safety calculation module acquires numerical value information, and performs numerical value calculation based on the acquired numerical value information to obtain an energy difference reference value; the data analysis module receives the energy difference reference value to perform data analysis, and analyzes the security of the energy information; the server receives the data analysis information of the data analysis module and controls the monitoring and early warning module to give an alarm; the method and the device are based on the acquisition of the energy information and the power grid information in the micro-grid, the acquisition of the energy distribution information and the parameters in the power grid information is carried out, the reasonable energy distribution is carried out on the energy information, and the operation safety of the power grid is ensured.
Description
Technical Field
The invention relates to the technical field of microgrid energy control, in particular to a microgrid energy control method and system based on a virtual power plant.
Background
The virtual power plant is a power supply coordination management system which realizes the aggregation and coordination optimization of DER (distributed generation), an energy storage system, controllable loads, electric vehicles and the like through an advanced information communication technology and a software system and is used as a special power plant to participate in the operation of a power market and a power grid. The core of the virtual plant concept can be summarized as "communication" and "aggregation". The key technologies of the virtual power plant mainly comprise a coordination control technology, an intelligent metering technology and an information communication technology. The most attractive function of the virtual power plant is to enable the aggregation of DER to participate in the operation of the power market and the auxiliary service market, and provide management and auxiliary services for the power distribution network and the power transmission network. The solution of the virtual power plant has great market potential in China, and is undoubtedly a good choice for China facing the contradiction between electric power shortage and low energy efficiency.
The microgrid is a microgrid, and refers to a small power generation and distribution system which is composed of a distributed power supply, an energy storage device, an energy conversion device, a load, a monitoring and protecting device and the like.
In the prior art, a microgrid cannot perform parameter analysis based on acquired energy information during energy distribution, cannot judge difference information of the energy information during each acquisition, influences energy information distribution effect, and cannot analyze and judge a circuit based on grid information in the microgrid during energy distribution, so that the microgrid has potential safety hazards.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a virtual power plant-based microgrid energy control method and system.
In order to achieve the purpose, the invention is realized by the following technical scheme: a virtual power plant-based microgrid energy control method comprises the following steps:
step S1: acquiring energy demand information and energy history information, defining the energy demand information and the energy history information as energy information, transmitting the energy information to an information processing module, and performing data analysis processing on the information processing module based on the energy information to extract numerical information related to the energy information;
step S2: the safety calculation module acquires numerical value information, and performs numerical value calculation based on the acquired numerical value information to obtain an energy difference reference value; the data analysis module receives the energy difference reference value to perform data analysis, and analyzes the security of the energy information;
and step S3: the server receives the data analysis information of the data analysis module to control the monitoring and early warning module to give an alarm; the monitoring and early warning module acquires power grid information of the control system, and transmits the acquired information to the safety calculation module, and the safety calculation module calculates a safety calculation reference value according to the acquired power grid information;
and step S4: the data analysis module receives the safety calculation reference value to perform data analysis, analyzes the safety of the power grid information, and the monitoring and early warning module receives the data analysis content and gives an alarm.
Further, in step S1, when extracting the numerical information, the specific steps are as follows:
step S11: the method comprises the steps of obtaining stored energy historical information, and obtaining a plurality of historical time interval values, a plurality of historical energy demand values, a plurality of historical energy price values and a plurality of historical energy demand types in the energy historical information;
step S12: respectively calculating an average value of the obtained multiple historical time interval values, multiple historical energy demand values, multiple historical energy price values and multiple historical energy demand types;
step S13: and defining the obtained average value as a standard historical time interval value, a standard historical energy demand value, a standard historical energy price value and a standard historical energy demand type in sequence.
Further, in step S2, when performing the analysis, the specific steps are as follows:
step S21: the calculated multiple energy difference reference values are arranged in a descending order, and a first difference threshold value, a second difference threshold value and a third difference threshold value are set;
step S22: when the obtained energy difference reference value is within a first difference threshold interval, judging that the energy demand information is within a controllable range, and the difference of the currently obtained energy information profit interval is small;
when the energy difference reference value is within a second difference threshold value interval, judging that the energy demand information is reduced, and reducing the profit of the currently obtained energy information;
when the energy difference reference value is within a third difference threshold interval, judging that the energy demand information has larger difference;
step S23: the cost difference reference value is obtained through the safety calculation module, the reason of large difference is analyzed, the energy difference reference value obtained by the server is compared with the cost difference reference value, if the energy difference reference value is smaller than the cost difference reference value, the data analysis module sends out an allocable instruction to carry out energy allocation, and if the energy difference reference value is larger than the cost difference reference value, the data analysis module sends out an allocation refusing instruction.
Further, the monitoring and early warning module comprises a monitoring submodule and an alarm submodule, the monitoring submodule acquires power grid information, the alarm submodule comprises a first alarm unit and a second alarm unit, and the first alarm unit and the second alarm unit receive the instruction information of the data analysis module to alarm; when the energy difference value received by the first alarm unit is within the third difference threshold interval, an alarm is given out, the alarm sound is 50-60 decibels, and the duration time is within 5 s;
the safety calculation reference value comprises a rated calculation reference value and a real-time calculation reference value; respectively solving a rated calculation reference value and a real-time calculation reference value, and analyzing after solving;
setting a rated calculation reference value EDJSCKz; setting a real-time calculation reference value SSJSCKz; when the analysis is carried out, the specific steps are as follows:
step S41: if SSJSCKz-EDJSCKz =0, the line is judged to be in the optimal state, the line safety degree is high, and the line safety degree is the first safety level;
step S42, if SSJSCKz-EDJSCKz is more than 0 and less than EDJSCKz/2, judging that the line is normally used, and within the safety range, the safety degree of the line is general and is a second safety level;
step S43: if the EDJSCKz/2 is more than SSJSCKz-EDJSCKz is more than 3 multiplied by EDJSCKz/4, judging that the line has potential safety hazard, and determining that the line has low safety degree and is the third safety level;
step S44: if 3 multiplied by EDJSCKz/4 is less than SSJSCKz-EDJSCKz is less than EDJSCKz, judging that the line needs to be replaced, and the line safety degree is poor, and replacing the line in time to be the fourth safety level;
the second alarm unit receives that the safety calculation reference value is in a third safety level, and gives an alarm, wherein the alarm sound is 60-70 decibels, and the duration is 7s; and the second alarm unit receives the safety calculation reference value at the fourth safety level and gives an alarm, the alarm sound is 80-100 decibels, and the duration is 10s.
A virtual power plant-based micro-grid energy control system comprises an energy information acquisition module, an information processing module, a safety calculation module, a monitoring and early warning module, a data analysis module and a server; the energy information acquisition module, the information processing module, the safety calculation module, the monitoring and early warning module and the data analysis module are respectively in data connection with the server;
the energy information acquisition module acquires energy demand information and energy history information and defines the energy demand information and the energy history information as energy information;
the energy information is transmitted to an information processing module, the information processing module carries out data analysis processing based on the energy information and extracts numerical value information related to the energy information;
the numerical value information is transmitted to a safety calculation module, and the safety calculation module calculates the numerical value based on the acquired numerical value information to obtain an energy difference reference value;
the data analysis module receives the energy difference reference value to perform data analysis, and analyzes the security of the energy information;
the server receives data analysis information of the data analysis module and controls the monitoring and early warning module to give an alarm;
the monitoring and early warning module acquires power grid information of the control system, and transmits the acquired information to the safety calculation module, and the safety calculation module calculates a safety calculation reference value according to the acquired power grid information;
the data analysis module receives the safety calculation reference value to perform data analysis and analyze the safety of the power grid information;
and the monitoring and early warning module receives the data analysis content and sends out an alarm.
Further, the energy demand information includes a time interval value, an energy demand value, an energy price value, and an energy demand type;
the energy historical information is energy demand information which is stored for historical acquisition of the server and comprises a historical time interval value, a historical energy demand value, a historical energy price value and a historical energy demand type;
the information processing module receives the energy demand information and the energy history information, and when the energy demand information and the energy history information are acquired, the energy demand information and the energy history information are specifically as follows:
acquiring stored energy historical information, and acquiring a plurality of historical time interval values, a plurality of historical energy demand values, a plurality of historical energy price values and a plurality of historical energy demand types;
respectively calculating an average value of the obtained plurality of historical time interval values, the plurality of historical energy demand values, the plurality of historical energy price values and the plurality of historical energy demand types, and sequentially defining the calculated average value as a standard historical time interval value, a standard historical energy demand value, a standard historical energy price value and a standard historical energy demand type;
the set time interval values are: SJSZz; energy demand value: XQSZz; the energy price value is: JGSZz; the energy demand types are: XQZLa;
setting the time interval value of the first energy demand type as follows: SJSZz1; energy demand value: XQSZz1; the energy price value is: JGSZz1;
the time interval values for the second energy demand category are: SJSZz2; energy demand value: XQSZz2; the energy price value is: JGSZz2;
the time interval values for the third energy demand category are: SJSZz3; energy demand value: XQSZz3; the energy price value is: JGSZz3;
……
the time interval values of the XQZLA energy demand types are as follows: sjszxqzla; energy demand value: xqszxqzla; the energy price value is: JGSZzxqzla;
the standard time interval values are: BZSSZz; standard energy demand value: BZXQSZz; the standard energy price value is: BZJGSZz; the standard energy demand types are: BZXQZLA, the set information is defined as numerical value information, and the numerical value information is transmitted to the safety calculation module.
Further, the safety calculation module receives numerical information to calculate the energy difference reference value;
the energy difference analysis method comprises the steps of sequentially obtaining energy difference reference values of a plurality of energy demand types for calculation, arranging the plurality of energy difference reference values obtained through calculation from small to large, setting a first difference threshold value, a second difference threshold value and a third difference threshold value, arranging the plurality of energy difference reference values obtained through calculation from small to large on the first difference threshold value, the second difference threshold value and the third difference threshold value, arranging the energy demand types which are the number of the energy difference reference values, wherein the number of the energy difference reference values is XQZLA, arranging the number of the first energy difference reference values to the number of (XQZLA + x)/2 energy difference reference values in an internal interval of the first difference threshold value, arranging the number of (XQZLA + x)/2 energy difference reference values to the number of (XQZLA + c)/3 energy difference reference values in an internal interval of the second difference threshold value, arranging the number of (XQZLA + c)/3 energy difference reference values to the number of XQZLA + c in an internal interval of the second difference threshold value, analyzing the difference of the first threshold value and analyzing data of the third difference threshold value and the energy difference threshold value to the third difference threshold value.
Further, the data analysis module receives the energy difference reference values at the first difference threshold, the second difference threshold and the third difference threshold for analysis, and the analysis is as follows:
when the energy difference reference value is within a first difference threshold interval, judging that the energy demand information is within a controllable range, and the difference of the currently acquired energy information profit interval is small;
when the energy difference reference value is within the second difference threshold value interval, judging that the energy demand information is reduced, and reducing the profit of the currently obtained energy information;
when the energy difference reference value is within a third difference threshold interval, judging that the energy demand information difference is large, obtaining the reason for reducing the energy demand information through the server, comparing the energy difference reference value obtained by the server with the cost difference reference value, if the energy difference reference value is smaller than the cost difference reference value, sending an allocable instruction by the data analysis module to perform energy allocation, and if the energy difference reference value is larger than the cost difference reference value, sending an allocation refusing instruction by the data analysis module.
Further, the power grid information comprises power grid rated information and power grid real-time information;
the power grid rated information comprises a rated resistance value, a rated current value, a rated temperature value and a rated voltage value;
the real-time information of the power grid comprises a resistance value, a current value, a temperature value and a voltage value;
setting the rated resistance value as: EDDZz; rated current value: EDDLSz; rated temperature value: EDWDSz; rated voltage value: EDDYSz;
the resistance values were set as: DZz; current value: DLSz; temperature value: WDSz; voltage value: DYSz;
the safety calculation reference value comprises a rated calculation reference value and a real-time calculation reference value;
solving a rated calculation reference value; setting a rated calculation reference value EDJSCKz; solving a real-time calculation reference value; setting a real-time calculation reference value SSJSCKz, solving a plurality of real-time calculation reference values, and transmitting the solved real-time calculation reference values and the rated calculation reference values to a data analysis module.
Further, the analysis was specifically performed as follows:
the data analysis module receives the rated calculation reference value and the real-time calculation reference value, and performs difference calculation on the real-time calculation reference value and the rated calculation reference value;
if SSJSCKz-EDJSCKz =0, the line is judged to be in the optimal state, the line safety degree is high, and the line safety degree is the first safety level;
if the SSJSCKz is more than 0 and less than EDJSCKz/2, judging that the line is normally used, and within the safety range, the safety degree of the line is general and is a second safety level;
if the EDJSCKz/2 is more than SSJSCKz-EDJSCKz is more than 3 multiplied by EDJSCKz/4, judging that the line has potential safety hazard, and determining that the line has low safety degree and is the third safety level;
if 3 multiplied by EDJSCKz/4 is less than SSJSCKz-EDJSCKz is less than EDJSCKz, judging that the line needs to be replaced, and the line safety degree is poor, and replacing the line in time to be the fourth safety level; the monitoring and early warning module receives the data analysis module, analyzes and sends an alarm to remind a line installation level, and the server receives the safety level information to send a maintenance instruction to replace and maintain the line.
The invention has the beneficial effects that:
1. according to the method, reasonable energy distribution is carried out according to comprehensive calculation and analysis of the obtained energy distribution information parameter information based on the acquisition of the energy information in the micro-grid, the safety of the energy information is obtained through analysis, the energy price in the effective energy information is low, and loss is caused during energy distribution.
2. According to the invention, the power grid information is acquired, the parameters are extracted based on the acquired power grid information, the safety reference value is acquired according to the extracted parameters, and the micro-grid circuit is maintained and replaced according to the safety reference value, so that the safe operation of the micro-grid is ensured.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a method step diagram of a lithium ion battery operation safety evaluation method according to the present invention;
fig. 2 is a schematic block diagram of a lithium ion battery operation safety evaluation system according to the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
In the present invention, please refer to fig. 1 and fig. 2, a virtual power plant-based microgrid energy control system includes an energy information acquisition module, an information processing module, a safety calculation module, a monitoring and early warning module, a data analysis module and a server; the energy information acquisition module, the information processing module, the safety calculation module, the monitoring and early warning module and the data analysis module are respectively in data connection with the server;
the energy information acquisition module acquires energy demand information and energy history information and defines the energy demand information and the energy history information as energy information;
the energy demand information comprises a time interval value, an energy demand value, an energy price value and an energy demand type;
the energy historical information is energy demand information which is stored for server history acquisition and comprises a historical time interval value, a historical energy demand value, a historical energy price value and a historical energy demand type;
the energy information is transmitted to an information processing module, the information processing module carries out data analysis processing based on the energy information, and numerical value information related to the energy information is extracted;
the information processing module receives the energy demand information and the energy history information, and when the energy demand information and the energy history information are acquired, the energy demand information and the energy history information are specifically as follows:
acquiring stored energy historical information, and acquiring a plurality of historical time interval values, a plurality of historical energy demand values, a plurality of historical energy price values and a plurality of historical energy demand types;
respectively calculating an average value of the obtained plurality of historical time interval values, the plurality of historical energy demand values, the plurality of historical energy price values and the plurality of historical energy demand types, and sequentially defining the calculated average value as a standard historical time interval value, a standard historical energy demand value, a standard historical energy price value and a standard historical energy demand type;
the set time interval values are: SJSZz; energy demand value: XQSZz; the energy price value is: JGSZz; the energy demand types are: XQZLa;
setting the time interval value of the first energy demand type as follows: SJSZz1; energy demand value: XQSZz1; the energy price value is: JGSZz1;
the time interval values for the second energy demand category are: SJSZz2; energy demand value: XQSZz2; the energy price value is: JGSZz2;
the time interval values for the third energy demand category are: SJSZz3; energy demand value: XQSZz3; the energy price value is: JGSZz3;
……
the time interval values of the XQZLA energy demand types are as follows: sjszxqzla; energy demand value: xqszxqzla; the energy price value is: JGSZzxqzla;
the standard time interval values are: BZSSZz; standard energy demand value: BZXQSZz; the standard energy price value is: BZJGSZz; the standard energy demand types are: BZXQZLa;
the numerical information is transmitted to a safety calculation module, and the safety calculation module performs numerical calculation based on the acquired numerical information to obtain an energy difference reference value;
the safety calculation module receives the numerical information to calculate the energy difference reference value, and the energy difference reference value is set as follows: NYCICKz;
wherein K is a constant and is greater than 0;
acquiring energy information manufacturing cost information through a server, substituting the energy information manufacturing cost information into the formula, and obtaining a cost difference reference value;
the energy difference reference values of a plurality of energy demand types are sequentially obtained for calculation, the plurality of energy difference reference values obtained through calculation are arranged from small to large, a first difference threshold value, a second difference threshold value and a third difference threshold value are set, the plurality of energy difference reference values obtained through calculation are arranged in the first difference threshold value, the second difference threshold value and the third difference threshold value from small to large, the energy demand types are the energy difference reference value number, the energy difference reference value number is XQZLA, the first energy difference reference value number is (XQZLA + x)/2 energy difference reference values are arranged in an internal interval of the first difference threshold value, the (XQZLA + x)/2 energy difference reference values are (XQZLA + c)/3 energy difference reference values are arranged in an internal interval of the second difference threshold value, and the (XQZLA + c)/3 energy difference reference values are arranged in an internal interval of the third difference threshold value.
It should be noted that x is 1 when XQZLA is odd, x is 0 when XQZLA is even, and XQZLA + c is a multiple of 3, where c is a positive integer and c is ≦ 2.
The data analysis module receives the energy difference reference value to perform data analysis, and analyzes the security of the energy information;
the data analysis module receives the energy difference reference values at the first difference threshold, the second difference threshold and the third difference threshold for analysis, and the specific analysis is as follows:
when the energy difference reference value is within a first difference threshold interval, judging that the energy demand information is within a controllable range, and the difference of the currently acquired energy information profit interval is small;
when the energy difference reference value is within the second difference threshold value interval, judging that the energy demand information is reduced, and reducing the profit of the currently obtained energy information;
when the energy difference reference value is within a third difference threshold interval, judging that the energy demand information difference is large, obtaining the reason for reducing the energy demand information through the server, comparing the energy difference reference value obtained by the server with the cost difference reference value, if the energy difference reference value is smaller than the cost difference reference value, sending an allocable instruction by the data analysis module to perform energy allocation, and if the energy difference reference value is larger than the cost difference reference value, sending an allocation refusal instruction by the data analysis module;
the server receives the data analysis information of the data analysis module to control the monitoring and early warning module to give an alarm;
the monitoring and early warning module comprises a monitoring submodule and an alarm submodule, the monitoring submodule acquires power grid information, the alarm submodule comprises a first alarm unit and a second alarm unit, and the first alarm unit and the second alarm unit receive instruction information of the data analysis module to alarm;
the monitoring and early warning module acquires power grid information of the control system, and transmits the acquired information to the safety calculation module, and the safety calculation module calculates a safety calculation reference value according to the acquired power grid information;
the power grid information comprises power grid rated information and power grid real-time information;
the power grid rated information comprises a rated resistance value, a rated current value, a rated temperature value and a rated voltage value;
the real-time information of the power grid comprises a resistance value, a current value, a temperature value and a voltage value;
setting the rated resistance value as: EDDZz; rated current value: EDDLSz; rated temperature value: EDWDSz; rated voltage value: EDDYSz;
the resistance values were set as: DZz; current value: DLSz; temperature value: WDSz; voltage value: DYSz;
the safety calculation reference value comprises a rated calculation reference value and a real-time calculation reference value;
solving a rated calculation reference value; setting a rated calculation reference value EDJSCKz; please refer to the following formula:
solving a real-time calculation reference value; setting a real-time calculation reference value SSJSCKz; please refer to the following formula:
substituting the acquired real-time power grid information in a T time period to obtain a plurality of real-time calculation reference values;
the data analysis module receives the safety calculation reference value to perform data analysis and analyze the safety of the power grid information;
the analysis was carried out as follows:
the data analysis module receives the rated calculation reference value and the real-time calculation reference value, and performs difference calculation on the real-time calculation reference value and the rated calculation reference value;
if SSJSCKz-EDJSCKz =0, the line is judged to be in the optimal state, the line safety degree is high, and the line safety degree is the first safety level;
if the SSJSCKz is more than 0 and less than EDJSCKz/2, judging that the line is normally used, and within the safety range, the safety degree of the line is general and is a second safety level;
if the EDJSCKz/2 is more than SSJSCKz-EDJSCKz is more than 3 multiplied by EDJSCKz/4, judging that the line has potential safety hazard, and determining that the line has low safety degree and is the third safety level;
if 3 multiplied by EDJSCKz/4 is less than SSJSCKz-EDJSCKz is less than EDJSCKz, judging that the line needs to be replaced, and the line safety degree is poor, and replacing the line in time to be the fourth safety level;
and the monitoring and early warning module receives the data analysis content and gives an alarm.
The monitoring and early warning module receives the data analysis module, analyzes and sends an alarm to remind a line installation level, and the server receives the safety level information to send a maintenance instruction to replace and maintain the line.
The invention discloses a virtual power plant-based microgrid energy control method, which comprises the following steps:
step S1: acquiring energy demand information and energy history information, defining the energy demand information and the energy history information as energy information, transmitting the energy information to an information processing module, and performing data analysis processing on the information processing module based on the energy information to extract numerical value information related to the energy information;
when numerical information is extracted, the specific steps are as follows:
step S11: the method comprises the steps of obtaining stored energy historical information, and obtaining a plurality of historical time interval values, a plurality of historical energy demand values, a plurality of historical energy price values and a plurality of historical energy demand types in the energy historical information;
step S12: respectively calculating an average value of the obtained multiple historical time interval values, multiple historical energy demand values, multiple historical energy price values and multiple historical energy demand types;
step S13: defining the obtained average value as a standard historical time interval value, a standard historical energy demand value, a standard historical energy price value and a standard historical energy demand type in sequence;
step S2: the safety calculation module acquires numerical value information, and performs numerical value calculation based on the acquired numerical value information to obtain an energy difference reference value; and the data analysis module receives the energy difference reference value to perform data analysis, and analyzes the security of the energy information.
When the analysis is carried out, the specific steps are as follows:
step S21: the calculated multiple energy difference reference values are arranged in a descending order, and a first difference threshold value, a second difference threshold value and a third difference threshold value are set;
step S22: when the obtained energy difference reference value is within a first difference threshold interval, judging that the energy demand information is within a controllable range, and the difference of the currently obtained energy information profit interval is small;
when the energy difference reference value is within the second difference threshold value interval, judging that the energy demand information is reduced, and reducing the profit of the currently obtained energy information;
when the energy difference reference value is within a third difference threshold interval, judging that the energy demand information has a large difference;
step S23: the cost difference reference value is obtained through the safety calculation module, the reason of large difference is analyzed, the energy difference reference value obtained by the server is compared with the cost difference reference value, if the energy difference reference value is smaller than the cost difference reference value, the data analysis module sends out an allocable instruction to carry out energy allocation, and if the energy difference reference value is larger than the cost difference reference value, the data analysis module sends out an allocation refusing instruction.
And step S3: the server receives the data analysis information of the data analysis module to control the monitoring and early warning module to give an alarm; the monitoring and early warning module acquires power grid information of the control system, and transmits the acquired information to the safety calculation module, and the safety calculation module calculates a safety calculation reference value according to the acquired power grid information;
the monitoring and early warning module comprises a monitoring submodule and an alarm submodule, the monitoring submodule acquires power grid information, the alarm submodule comprises a first alarm unit and a second alarm unit, and the first alarm unit and the second alarm unit receive the instruction information of the data analysis module to alarm; when the energy difference value received by the first alarm unit is within the third difference threshold interval, an alarm is given out, the alarm sound is 50-60 decibels, and the duration time is within 5 s;
and step S4: the data analysis module receives the safety calculation reference value to perform data analysis, analyzes the safety of the power grid information, and the monitoring and early warning module receives the data analysis content and gives an alarm.
The safety calculation reference value comprises a rated calculation reference value and a real-time calculation reference value; respectively solving a rated calculation reference value and a real-time calculation reference value, and analyzing after solving;
setting a rated calculation reference value EDJSCKz; setting a real-time calculation reference value SSJSCKz; when the analysis is carried out, the specific steps are as follows:
step S41: if SSJSCKz-EDJSCKz =0, the line is judged to be in the optimal state, the line safety degree is high, and the line safety degree is the first safety level;
step S42, if SSJSCKz-EDJSCKz is more than 0 and less than EDJSCKz/2, judging that the line is normally used, and within the safety range, the safety degree of the line is general and is a second safety level;
step S43: if the EDJSCKz/2 is more than SSJSCKz-EDJSCKz is more than 3 multiplied by EDJSCKz/4, judging that the line has potential safety hazard, and determining that the line has low safety degree and is the third safety level;
step S44: and if the voltage is 3 multiplied by EDJSCKz/4 and SSJSCKz-EDJSCKz and EDJSCKz are smaller than EDJSCKz, judging that the line needs to be replaced, ensuring that the safety degree of the line is poor, and replacing the line in time to be the fourth safety level.
The second alarm unit receives the safety calculation reference value and gives an alarm at a third safety level, the alarm sound is 60-70 decibels, and the duration is 7s; and the second alarm unit receives the safety calculation reference value at the fourth safety level and gives an alarm, the alarm sound is 80-100 decibels, and the duration is 10s.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A microgrid energy control method based on a virtual power plant is characterized by comprising the following steps:
step S1: acquiring energy demand information and energy history information, defining the energy demand information and the energy history information as energy information, transmitting the energy information to an information processing module, and performing data analysis processing on the information processing module based on the energy information to extract numerical information related to the energy information;
step S2: the safety calculation module acquires numerical value information, and performs numerical value calculation based on the acquired numerical value information to obtain an energy difference reference value; the data analysis module receives the energy difference reference value to perform data analysis, and analyzes the security of the energy information;
when the analysis is carried out, the specific steps are as follows:
step S21: the calculated multiple energy difference reference values are arranged according to the sequence from small to large, and a first difference threshold value, a second difference threshold value and a third difference threshold value are set;
step S22: when the obtained energy difference reference value is within a first difference threshold interval, judging that the energy demand information is within a controllable range, and the difference of the currently obtained energy information profit interval is small;
when the energy difference reference value is within a second difference threshold value interval, judging that the energy demand information is reduced, and reducing the profit of the currently obtained energy information;
when the energy difference reference value is within a third difference threshold interval, judging that the energy demand information has larger difference;
step S23: the safety calculation module is used for solving a cost difference reference value, analyzing reasons with larger differences, the server is used for comparing the energy difference reference value solved by the server with the cost difference reference value, if the energy difference reference value is smaller than the cost difference reference value, the data analysis module sends out an allocable instruction to carry out energy allocation, and if the energy difference reference value is larger than the cost difference reference value, the data analysis module sends out an allocation refusing instruction;
and step S3: the server receives the data analysis information of the data analysis module to control the monitoring and early warning module to give an alarm; the monitoring and early warning module acquires power grid information of the control system, and transmits the acquired information to the safety calculation module, and the safety calculation module calculates a safety calculation reference value according to the acquired power grid information;
and step S4: the data analysis module receives the safety calculation reference value to perform data analysis, analyzes the safety of the power grid information, and the monitoring and early warning module receives the data analysis content and gives an alarm.
2. The virtual power plant-based microgrid energy control method according to claim 1, characterized in that in the step S1, when numerical information is extracted, the specific steps are as follows:
step S11: the method comprises the steps of obtaining stored energy historical information, and obtaining a plurality of historical time interval values, a plurality of historical energy demand values, a plurality of historical energy price values and a plurality of historical energy demand types in the energy historical information;
step S12: respectively calculating an average value of the obtained multiple historical time interval values, multiple historical energy demand values, multiple historical energy price values and multiple historical energy demand types;
step S13: and defining the obtained average value as a standard historical time interval value, a standard historical energy demand value, a standard historical energy price value and a standard historical energy demand type in sequence.
3. The virtual power plant based microgrid energy control method is characterized in that the monitoring and early warning module comprises a monitoring submodule and an alarm submodule, grid information is obtained through the monitoring submodule, the alarm submodule comprises a first alarm unit and a second alarm unit, and the first alarm unit and the second alarm unit receive data analysis module instruction information to alarm; when the energy difference value received by the first alarm unit is within the third difference threshold interval, an alarm is given out, the alarm sound is 50-60 decibels, and the duration time is within 5 s;
the safety calculation reference value comprises a rated calculation reference value and a real-time calculation reference value; respectively solving a rated calculation reference value and a real-time calculation reference value, and analyzing after solving;
setting a rated calculation reference value EDJSCKz; setting a real-time calculation reference value SSJSCKz; when the analysis is carried out, the specific steps are as follows:
step S41: if SSJSCKz-EDJSCKz =0, the line is judged to be in the optimal state, the line safety degree is high, and the line safety degree is the first safety level;
step S42, if SSJSCKz-EDJSCKz is more than 0 and less than EDJSCKz/2, judging that the line is normally used, and within the safety range, the safety degree of the line is general and is a second safety level;
step S43: if the EDJSCKz/2 is more than SSJSCKz-EDJSCKz is more than 3 multiplied by EDJSCKz/4, the potential safety hazard of the line is judged, the safety degree of the line is low, and the line is in a third safety level;
step S44: if 3 multiplied by EDJSCKz/4 is less than SSJSCKz-EDJSCKz is less than EDJSCKz, judging that the line needs to be replaced, and the line safety degree is poor, and replacing the line in time to be the fourth safety level;
the second alarm unit receives the safety calculation reference value and gives an alarm at a third safety level, the alarm sound is 60-70 decibels, and the duration is 7s; and the second alarm unit receives the safety calculation reference value at the fourth safety level and gives an alarm, the alarm sound is 80-100 decibels, and the duration is 10s.
4. A virtual power plant-based microgrid energy control system is applicable to the virtual power plant-based microgrid energy control method of any one of claims 1-3, and is characterized in that the control system comprises an energy information acquisition module, an information processing module, a safety calculation module, a monitoring and early warning module, a data analysis module and a server; the energy information acquisition module, the information processing module, the safety calculation module, the monitoring and early warning module and the data analysis module are respectively in data connection with the server;
the energy information acquisition module acquires energy demand information and energy history information and defines the energy demand information and the energy history information as energy information;
the energy information is transmitted to an information processing module, the information processing module carries out data analysis processing based on the energy information and extracts numerical value information related to the energy information;
the numerical information is transmitted to a safety calculation module, and the safety calculation module performs numerical calculation based on the acquired numerical information to obtain an energy difference reference value;
the data analysis module receives the energy difference reference value to perform data analysis, and analyzes the security of the energy information;
the server receives data analysis information of the data analysis module and controls the monitoring and early warning module to give an alarm;
the monitoring and early warning module acquires power grid information of the control system, and transmits the acquired information to the safety calculation module, and the safety calculation module calculates a safety calculation reference value according to the acquired power grid information;
the data analysis module receives the safety calculation reference value to perform data analysis and analyze the safety of the power grid information;
and the monitoring and early warning module receives the data analysis content and gives an alarm.
5. The virtual power plant based microgrid energy control system of claim 4, wherein the energy demand information includes a time interval value, an energy demand value, an energy price value and an energy demand category;
the energy historical information is energy demand information which is stored for historical acquisition of the server and comprises a historical time interval value, a historical energy demand value, a historical energy price value and a historical energy demand type;
the information processing module receives the energy demand information and the energy history information, and when the energy demand information and the energy history information are acquired, the energy demand information and the energy history information are specifically as follows:
acquiring stored energy historical information, and acquiring a plurality of historical time interval values, a plurality of historical energy demand values, a plurality of historical energy price values and a plurality of historical energy demand types;
respectively calculating an average value of the obtained plurality of historical time interval values, the plurality of historical energy demand values, the plurality of historical energy price values and the plurality of historical energy demand types, and sequentially defining the calculated average value as a standard historical time interval value, a standard historical energy demand value, a standard historical energy price value and a standard historical energy demand type;
the set time interval values are: SJSZz; energy demand value: XQSZz; the energy price value is: JGSZz; the energy demand types are: XQZLa;
setting the time interval value of the first energy demand type as follows: SJSZz1; energy demand value: XQSZz1; the energy price value is: JGSZz1;
the time interval values for the second energy demand category are: SJSZz2; energy demand value: XQSZz2; the energy price value is: JGSZz2;
the time interval values for the third energy demand category are: SJSZz3; energy demand value: XQSZz3; the energy price value is: JGSZz3;
……
the time interval values of the XQZLA energy demand types are as follows: sjszxqzla; energy demand value: xqszxqzla; the energy price value is: JGSZzxqzla;
the standard time interval values are: BZSSZz; standard energy demand value: BZXQSZz; the standard energy price value is: BZJGSZz; the standard energy demand types are: BZXQZLA, the set information is defined as numerical value information, and the numerical value information is transmitted to the safety calculation module.
6. The virtual power plant based microgrid energy control system of claim 5, wherein the safety calculation module receives numerical information and calculates an energy difference reference value;
the energy difference analysis method comprises the steps of sequentially obtaining energy difference reference values of a plurality of energy demand types for calculation, arranging the plurality of energy difference reference values obtained through calculation from small to large, setting a first difference threshold value, a second difference threshold value and a third difference threshold value, arranging the plurality of energy difference reference values obtained through calculation from small to large on the first difference threshold value, the second difference threshold value and the third difference threshold value, arranging the energy demand types which are the number of the energy difference reference values, wherein the number of the energy difference reference values is XQZLA, arranging the number of the first energy difference reference values to the number of (XQZLA + x)/2 energy difference reference values in an internal interval of the first difference threshold value, arranging the number of (XQZLA + x)/2 energy difference reference values to the number of (XQZLA + c)/3 energy difference reference values in an internal interval of the second difference threshold value, arranging the number of (XQZLA + c)/3 energy difference reference values to the number of XQZLA + c in an internal interval of the second difference threshold value, analyzing the difference of the first threshold value and analyzing data of the third difference threshold value and the energy difference threshold value to the third difference threshold value.
7. The virtual power plant based microgrid energy control system of claim 6, wherein the data analysis module receives energy difference reference values at a first difference threshold, a second difference threshold and a third difference threshold for analysis, and the analysis is as follows:
when the energy difference reference value is within a first difference threshold interval, judging that the energy demand information is within a controllable range, and the difference of the currently acquired energy information profit interval is small;
when the energy difference reference value is within a second difference threshold value interval, judging that the energy demand information is reduced, and reducing the profit of the currently obtained energy information;
and when the energy difference reference value is within a third difference threshold interval, judging that the energy demand information difference is large, obtaining the reason for reducing the energy demand information through the server, comparing the energy difference reference value obtained by the server with the cost difference reference value, if the energy difference reference value is smaller than the cost difference reference value, sending an allocable instruction by the data analysis module to perform energy allocation, and if the energy difference reference value is larger than the cost difference reference value, sending an allocation refusing instruction by the data analysis module.
8. The virtual power plant based microgrid energy control system of claim 4, characterized in that grid information includes grid rating information and grid real-time information;
the power grid rated information comprises a rated resistance value, a rated current value, a rated temperature value and a rated voltage value;
the real-time information of the power grid comprises a resistance value, a current value, a temperature value and a voltage value;
setting the rated resistance value as: EDDZz; rated current value: EDDLSz; rated temperature value: EDWDSz; rated voltage value: EDDYSz;
the resistance values were set as: DZz; current value: DLSz; temperature value: WDSz; voltage value: DYSz;
the safety calculation reference value comprises a rated calculation reference value and a real-time calculation reference value;
solving a rated calculation reference value; setting a rated calculation reference value EDJSCKz; solving a real-time calculation reference value; setting a real-time calculation reference value SSJSCKz, solving a plurality of real-time calculation reference values, and transmitting the solved real-time calculation reference values and the rated calculation reference values to a data analysis module.
9. The microgrid energy control system based on a virtual power plant of claim 8, characterized in that the analysis is specifically performed as follows:
the data analysis module receives the rated calculation reference value and the real-time calculation reference value, and performs difference calculation on the real-time calculation reference value and the rated calculation reference value;
if SSJSCKz-EDJSCKz =0, the line is judged to be in the optimal state, the line safety degree is high, and the line safety degree is the first safety level;
if the SSJSCKz is more than 0 and less than EDJSCKz/2, judging that the line is normally used, and within the safety range, the safety degree of the line is general and is a second safety level;
if the EDJSCKz/2 is more than SSJSCKz-EDJSCKz is more than 3 multiplied by EDJSCKz/4, judging that the line has potential safety hazard, and determining that the line has low safety degree and is the third safety level;
if 3 multiplied by EDJSCKz/4 is less than SSJSCKz-EDJSCKz is less than EDJSCKz, judging that the line needs to be replaced, and the line safety degree is poor, and replacing the line in time to be the fourth safety level; the monitoring and early warning module receives the data analysis module to analyze and send an alarm to remind a line installation level, and the server receives the safety level information to send a maintenance instruction to replace and maintain the line.
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