CN105305495A - Dispatching method for multi-energy complement micro-grid system - Google Patents
Dispatching method for multi-energy complement micro-grid system Download PDFInfo
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Abstract
The invention discloses a dispatching method for a multi-energy complement micro-grid system. The micro-grid system comprises a wind-solar power generation system, a gas generator, a storage battery and an electric car charging station, wherein the gas generator can be applied to combined heat and power generation; and the storage battery can be complementary with an energy source of the wind-solar power generation system as an energy storage device. According to the system, the energy storage characteristics of an electric car battery are utilized; a charge/discharge mode of an electric car can be flexibly selected, and is complementary with the wind-solar power generation system for power supply; the investment cost of the energy storage device is reduced; and the utilization rate of renewable energy sources is improved.
Description
Technical field
The present invention relates to micro-capacitance sensor technical field, be specifically related to a kind of multi-energy complementary micro-grid system scheduling method.
Background technology
Under the background that the energy is day by day in short supply, the exploitation of the regenerative resource such as wind-powered electricity generation, photovoltaic generally come into one's own.Micro-capacitance sensor improve the outstanding advantages in the quality of power supply, energy savings and environmental protection etc. determine its be solve energy demand growth and energy scarcity in China's economy and social fast development process, the inevitable choice of contradiction between using energy source and environmental protection.The intermittence of renewable energy power generation and fluctuation, directly affect system power quality and utilization of new energy resources rate, and therefore, micro-grid system selects the energy storage such as super capacitor or storage battery mode jointly to power to load usually as required.The configuration of energy storage device not only increases cost of investment, more reduces the flexible utilization of new forms of energy.As a kind of new traffic tool of low-carbon environment-friendly; electric automobile is in the development trend of scale; electric automobile charging station in region is accessible system charging not only; also electric energy can be provided when load peak to system; how to select the charge/discharge pattern of electric automobile neatly; utilizes with the complementation of the intermittent energy source such as the wind-powered electricity generation in micro-grid system, photovoltaic, significant for the flexibility of raising system power supply, raising renewable energy utilization rate and comprehensive economy.
Summary of the invention
The object of the present invention is to provide a kind of multi-energy complementary micro-grid system scheduling method, this micro-grid system comprises wind and light generating system, can be used as the gas electricity generator of cogeneration of heat and power and can be used as batteries and the electric automobile charging station of energy storage device and the complementation of the wind-solar system energy, this system utilizes the energy storage characteristic of batteries of electric automobile, select the charge/discharge pattern of electric automobile neatly, power with wind-solar system complementation, reduce the cost of investment of energy storage device, improve the utilance of regenerative resource.
The present invention solves above technical problem by the following technical programs:
The technical solution used in the present invention is: multi-energy complementary micro-grid system, it comprises: photovoltaic electrification component, wind-driven generator, gas turbine, batteries, electric automobile charging station, current transformer, alternating-current system, micro grid control system, circuit breaker, electrical network and load, described photovoltaic electrification component, wind-driven generator, gas turbine, batteries, electric automobile charging station are connected with alternating-current system respectively by current transformer, form the multiple complementary energy resource system of micro-capacitance sensor; Described alternating-current system is connected with load, is connected by circuit breaker with electrical network simultaneously; Described micro grid control system is connected with each device control end, the switching of micro battery unit working method can be realized, sharing of load, meritorious/idle control, voltage/frequency regulate and be optimized scheduling to the multiple micro battery in micro-grid system, regulate the energy complement mode of micro-grid system.
Described current transformer is divided into photovoltaic DC-to-AC converter, wind-electricity integration inverter, AC/DC current transformer and two way convertor; Described electric automobile charging station comprises the batteries of electric automobile of electric automobile battery charger, DC/DC current transformer, AC/DC current transformer, multidiameter option switch and access charging station, electric automobile battery charger is connected with DC/DC current transformer, suitable electric pressure is boosted to by Boost circuit, DC/DC current transformer is connected with AC/DC current transformer, be the alternating current of standard voltage grade by DC inverter, access bus carries out charge/discharge, and described electric automobile battery charger is connected with batteries of electric automobile by multidiameter option switch; Further, described batteries of electric automobile is according to its SOC(state-of-charge) be divided three classes, first kind battery is battery to be charged, its SOC limited field is 0-30%SOC, Equations of The Second Kind battery is can charge/discharge battery, its SOC limited field is 30%SOC-70%SOC, and the 3rd class battery is battery to be discharged, and its SOC limited field is 70%SOC-100%SOC.Electric automobile charging station is according to the charge/discharge state of micro-capacitance sensor scheduling controlling strategy real-time selection batteries of electric automobile, by the batteries of electric automobile that multidiameter option switch flexible access is dissimilar, in load valley period, by connecting the first kind or Equations of The Second Kind battery, it is charged, with wind-solar system generated output of dissolving, or in load peak period, connect the 3rd class or Equations of The Second Kind battery to system discharge, jointly power to load with wind-solar system.Described micro grid control system comprises data acquisition unit, micro-capacitance sensor slave station, Ethernet switch, micro-capacitance sensor main website, data acquisition and communication master server, s operation control server, main interface.Micro-capacitance sensor main website is connected with each micro-capacitance sensor slave station by TCP/IP Industrial Ethernet, form the data network of micro grid control system, measurement and control network adopts MODBUSRTU fieldbus, can realize each micro battery operational factor, voltage V, electric current I, storage battery SOC, temperature, security interrupt standard, overall safety margin, batteries of electric automobile SOC, treat charge/discharge number of batteries, the parameters such as line load real time data carry out acquisition monitoring, realize micro battery unit working method to switch, micro battery and electric automobile management and running strategy, meritorious/idle control, voltage/frequency regulates, sharing of load under island mode, the functions such as voltage/frequency adjustment, described micro-capacitance sensor dispatching method, it is characterized in that: priority scheduling uses honourable micro battery to power for system loading, when regenerative resource power supply is not enough, drop into gas turbine set, electric automobile charging station and batteries in load valley period, by storing the electric energy that regenerative resource sends to battery charging, in load peak period to system discharge, to meet intrasystem power-balance, reach the effect of peak load shifting, increase the utilance of regenerative resource in terminal energy to greatest extent.
Multi-energy complementary micro-grid system scheduling method, is specially:
Generally, micro-capacitance sensor adopts the pattern that is incorporated into the power networks, and performs following steps by micro-capacitance sensor controller:
Step 1: the size judging regenerative resource power output and system loading power, when regenerative resource power output is greater than load power, performs step 2, when regenerative resource power output is less than load power, performs step 4;
Step 2: gather the SOC of batteries of electric automobile by micro-capacitance sensor controller and determine the quantity of first kind battery (0-30%SOC) and Equations of The Second Kind battery (30%SOC-70%SOC), according to giving birth to the energy and load power difference, the first kind of scheduling respective numbers and Equations of The Second Kind battery (preferential use first kind battery), it is charged, if now regenerative resource power output still has residue, perform step 3;
Step 3: the SOC gathering batteries, if when single battery is in effective discharge and recharge interval 25%SOC-90%SOC, batteries is charged, when the inner general supply power of micro-capacitance sensor is greater than workload demand, by PCC(points of common connection) dump power is injected bulk power system;
Step 4: gather the SOC of batteries of electric automobile by micro-capacitance sensor controller and determine the quantity of the 3rd class battery (70%SOC-100%SOC) and Equations of The Second Kind battery (30%SOC-70%SOC), according to giving birth to the energy and load power difference, 3rd class of scheduling respective numbers and Equations of The Second Kind battery (preferential use the 3rd class battery), it is discharged, if when still can not meet workload demand, perform step 5;
Step 5: the SOC gathering batteries, if single battery is in the interval 25%SOC-90%SOC of effective discharge and recharge, discharges to batteries.When regenerative resource and energy-storage system electricity shortage, perform step 6;
Step 6: by micro-capacitance sensor controller drop into gas turbine set, now, when micro-grid system still can not meet workload demand, by access bulk power grid and micro battery jointly for load is powered.
When there is power quality problem or carry out scheduled overhaul in bulk power grid, micro-capacitance sensor is converted to islet operation pattern, the now energy-storage units of micro-capacitance sensor and controlled micro battery cooperation, voltage is provided, frequency reference and intrasystem power support, micro-capacitance sensor management and running strategy is: electric automobile charging station and storage battery scheduling strategy identical with under grid-connect mode, when each micro battery and energy-storage system can not meet workload demand, answer cut-out interruptible load to guarantee the need for electricity of important load, when renewable energy power generation power is greater than workload demand and energy-storage system charge power sum, answer cut-out renewable energy generation to maintain intrasystem power-balance.
Compared with prior art, the present invention introduces the multiple complementary energy resource system dispatching method comprising electric automobile in traditional micro-capacitance sensor, visible by foregoing description, the present invention has following beneficial effect: multi-energy complementary micro-grid system scheduling method provided by the invention, electric automobile is carried out complementation as mobile energy storage device and wind-solar system power, the energy storage device configuration capacity of micro-grid system can be reduced, investment reduction cost.Multi-energy complementary micro-grid system scheduling method provided by the invention, by micro grid control system management and running strategy, the flexible batteries of electric automobile selecting access dissimilar, realize the flexible conversion of charge/discharge pattern, energy storage device and regenerative resource complementation are utilized, discharges when accumulate, peak when network load low ebb, thus effectively avoid intermittence and the fluctuation of regenerative resource, use electricity in off-peak hours, play the effect of peak load shifting.
Accompanying drawing explanation
Fig. 1 is multi-energy complementary micro-grid system configuration schematic diagram;
Fig. 2 is electric automobile charging station structural representation;
Fig. 3 is micro-capacitance sensor controller architecture schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail:
With reference to figure 1, multi-energy complementary micro-grid system, described system comprises photovoltaic electrification component 1, wind-driven generator 2, gas turbine 3, batteries 4, electric automobile charging station 5, current transformer E1, alternating-current system E2, micro grid control system E3, circuit breaker 6, electrical network 7 and load 8, described photovoltaic electrification component 1, wind-driven generator 2, gas turbine 3, batteries 4, electric automobile battery charger 5 are connected with alternating-current system E2 respectively by current transformer E1, form the multiple complementary energy resource system of micro-capacitance sensor; Described alternating-current system E2 is connected with load 8, is connected by circuit breaker 6 with electrical network 7 simultaneously; Described micro grid control system E3 is connected with each device control end; L1 is electric power connection line, and L2 is information connecting line;
Described current transformer E1 is divided into photovoltaic DC-to-AC converter, wind-electricity integration inverter, AC/DC current transformer and two way convertor;
Described electric automobile charging station 5 comprises the batteries of electric automobile of electric automobile battery charger 51, DC/DC current transformer 52, AC/DC current transformer 53, multidiameter option switch 54 and access charging station, electric automobile battery charger 51 is connected with DC/DC current transformer 52, suitable electric pressure is boosted to by Boost circuit, DC/DC current transformer 52 is connected with AC/DC current transformer 53, be the alternating current of standard voltage grade by DC inverter, connecting system carries out charge/discharge, and described electric automobile battery charger 51 is connected with batteries of electric automobile by multidiameter option switch 54.
Further, described batteries of electric automobile is according to its SOC(state-of-charge) be divided three classes, first kind battery 55 is battery to be charged, its SOC limited field is 0-30%SOC, Equations of The Second Kind battery 56 is can charge/discharge battery, its SOC limited field is 30%SOC-70%SOC, and the 3rd class battery 57 is battery to be discharged, and its SOC limited field is 70%SOC-100%SOC.According to wind-solar system generated output and workload demand, by the batteries of electric automobile that multidiameter option switch flexible access is dissimilar, in load valley period, by connecting first kind battery 55 or Equations of The Second Kind battery 56, it is charged, with wind-solar system generated output of dissolving, or in load peak period, connect the 3rd class battery 57 or Equations of The Second Kind battery 56 to system discharge, jointly power to load with wind-solar system;
Described micro grid control system E3 comprises data acquisition unit E31, micro-capacitance sensor slave station E32, Ethernet switch E33, micro-capacitance sensor main website E34, data acquisition and communication master server E35, s operation control server E36, main interface E37.Micro-capacitance sensor main website is connected with each micro-capacitance sensor slave station by TCP/IP Industrial Ethernet, form the data network of micro grid control system, measurement and control network adopts MODBUSRTU fieldbus, can realize each micro battery operational factor, voltage V, electric current I, storage battery SOC, temperature, security interrupt standard, overall safety margin, batteries of electric automobile SOC, three class number of batteries, the parameters such as line load real time data carry out acquisition monitoring, realize micro battery unit working method to switch, micro battery and electric automobile management and running strategy, meritorious/idle control, voltage/frequency regulates, sharing of load under island mode, the functions such as voltage/frequency adjustment.
Described multi-energy complementary micro-grid dispatching method, it is characterized in that: priority scheduling uses honourable micro battery to power for system loading, when regenerative resource power supply is not enough, drop into gas turbine set, electric automobile charging station and batteries are in load valley period, by storing the electric energy that regenerative resource sends to battery charging, in load peak period to system discharge, to meet intrasystem power-balance, reach the effect of peak load shifting, increase the utilance of regenerative resource in terminal energy to greatest extent.
Multi-energy complementary micro-grid system scheduling method, is specially:
Generally, micro-capacitance sensor adopts the pattern that is incorporated into the power networks, and performs following steps by micro-capacitance sensor controller:
Step 1: the size judging regenerative resource power output and system loading power, when regenerative resource power output is greater than load power, performs step 2, when regenerative resource power output is less than load power, performs step 4;
Step 2: gather the SOC of batteries of electric automobile by micro-capacitance sensor controller and determine the quantity of first kind battery (0-30%SOC) and Equations of The Second Kind battery (30%SOC-70%SOC), according to giving birth to the energy and load power difference, the first kind of scheduling respective numbers and Equations of The Second Kind battery (preferential use first kind battery), it is charged, if now regenerative resource power output still has residue, perform step 3;
Step 3: the SOC gathering batteries, if when single battery is in effective discharge and recharge interval 25%SOC-90%SOC, batteries is charged, when the inner general supply power of micro-capacitance sensor is greater than workload demand, by PCC(points of common connection) dump power is injected bulk power system;
Step 4: gather the SOC of batteries of electric automobile by micro-capacitance sensor controller and determine the quantity of the 3rd class battery (70%SOC-100%SOC) and Equations of The Second Kind battery (30%SOC-70%SOC), according to giving birth to the energy and load power difference, 3rd class of scheduling respective numbers and Equations of The Second Kind battery (preferential use the 3rd class battery), it is discharged, if when still can not meet workload demand, perform step 5;
Step 5: the SOC gathering batteries, if single battery is in the interval 25%SOC-90%SOC of effective discharge and recharge, discharges to batteries.When regenerative resource and energy-storage system electricity shortage, perform step 6;
Step 6: by micro-capacitance sensor controller drop into gas turbine set, now, when micro-grid system still can not meet workload demand, by access bulk power grid and micro battery jointly for load is powered.
When there is power quality problem or carry out scheduled overhaul in bulk power grid, micro-capacitance sensor is converted to islet operation pattern, the now energy-storage units of micro-capacitance sensor and controlled micro battery cooperation, voltage is provided, frequency reference and intrasystem power support, micro-capacitance sensor management and running strategy is: electric automobile charging station and storage battery scheduling strategy identical with under grid-connect mode, when each micro battery and energy-storage system can not meet workload demand, answer cut-out interruptible load to guarantee the need for electricity of important load, when renewable energy power generation power is greater than workload demand and energy-storage system charge power sum, answer cut-out renewable energy generation to maintain intrasystem power-balance.The above, be only one of the present invention preferably embodiment, but the protection range of patent of the present invention is not limited thereto, and in relevant technical scope, the change that can expect easily or replacement, within the protection range that all should be encompassed in this patent.Therefore, the protection range of this patent should be as the criterion with the protection range of claim.
Claims (1)
1. a multi-energy complementary micro-grid system scheduling method, is characterized in that following steps:
Step one, judge the size of regenerative resource power output and system loading power, when regenerative resource power output is greater than load power, perform step 2, when regenerative resource power output is less than load power, perform step 4;
Step 2, gathered by micro-capacitance sensor controller batteries of electric automobile SOC and determine the quantity of first kind battery (0-30%SOC) and Equations of The Second Kind battery (30%SOC-70%SOC), according to giving birth to the energy and load power difference, the first kind of scheduling respective numbers and Equations of The Second Kind battery (preferential use first kind battery), it is charged, if now regenerative resource power output still has residue, perform step 3;
The SOC of step 3, collection batteries, if when single battery is in effective discharge and recharge interval 25%SOC-90%SOC, batteries is charged, when the inner general supply power of micro-capacitance sensor is greater than workload demand, by PCC(points of common connection) dump power is injected bulk power system;
Step 4, gathered by micro-capacitance sensor controller batteries of electric automobile SOC and determine the quantity of the 3rd class battery (70%SOC-100%SOC) and Equations of The Second Kind battery (30%SOC-70%SOC), according to giving birth to the energy and load power difference, 3rd class of scheduling respective numbers and Equations of The Second Kind battery (preferential use the 3rd class battery), it is discharged, if when still can not meet workload demand, perform step 5;
The SOC of step 5, collection batteries, if single battery is in the interval 25%SOC-90%SOC of effective discharge and recharge, discharges to batteries; When regenerative resource and energy-storage system electricity shortage, perform step 6;
Step 6, by micro-capacitance sensor controller drop into gas turbine set, now, when micro-grid system still can not meet workload demand, by access bulk power grid and micro battery jointly for load is powered.
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| CN108233366A (en) * | 2018-01-11 | 2018-06-29 | 国网电力科学研究院武汉南瑞有限责任公司 | A kind of coordination method for controlling power supply of providing multiple forms of energy to complement each other for being applicable in zero carbon building |
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| CN110112766A (en) * | 2019-02-25 | 2019-08-09 | 东华大学 | A kind of factory's micro-capacitance sensor black starting-up system and method |
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| CN112510737A (en) * | 2020-11-25 | 2021-03-16 | 国网湖南省电力有限公司 | Grid-connected and off-grid cooperative control method and system for photovoltaic energy storage charging station |
| WO2022183580A1 (en) * | 2021-03-05 | 2022-09-09 | 广东顺德电力设计院有限公司 | Microgrid configuration optimization method and apparatus, and device and storage medium |
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