A kind of microgrid control method
The present invention relates to a kind of microgrid control method more particularly to a kind of microgrid controls applied to steel tower base station micro-capacitance sensor
Present Global energy-saving and emission-reduction, energy security huge challenge under, photovoltaic, wind-force, biomass, combustion will be greatly developed
Useful supplement of the distributed power generation mode as centralization power generation including material battery etc., so can not only reduce power transmission
When power loss and by the expense brought of power distribution network upgrading, and for user bring relatively low expense, it is higher can
By property, preferable power quality, higher energy utilization rate and independence.
Distributed generation resource needs the management and control of rational energy, and the development in domestic and international presently relevant field is also relatively more slow
Slowly, achievement and actual effect are all smaller, and tremendous development and application implementation also need to more study.There are wind in intelligent micro-grid
The disturbing sources such as power power generation, solar energy power generating, diversity load at any time can in power distribution station, feeder line and substation's outlet
There are various forms of power swings.
Micro-capacitance sensor based on steel tower base station communication has its particularity, it is necessary to meet the requirement of steel tower base station micro-capacitance sensor：1st, supply
Electricity is reliable, stablize, power quality is met the requirements；2nd, to ensure sufficient battery capacity, deal with emergency case；3rd, multichannel is accurate
Metering, meets the efficiency to become more meticulous and accounting management；4th, load rating controls；5th, the automatic switchover of grid-connect mode, off-network pattern,
Photovoltaic, wind turbine, the coordination control of energy storage, can realize off-network stable operation.
The content of the invention
Goal of the invention：In view of the above problems, the present invention proposes a kind of microgrid controlling party applied to steel tower base station micro-capacitance sensor
Technical solution：Purpose to realize the present invention, the technical solution adopted in the present invention are：A kind of microgrid controlling party
Method, including step：
(1) piconet controller monitors power grid in real time；
(2) when detecting electric network fault, honourable power prediction is carried out, according to real-time honourable power prediction value and battery electricity
Amount carries out classification load control；Simultaneously wind light generation is controlled to enter off-grid operation pattern；If wind light generation is insufficient, control storage
It can battery discharge；
(3) when detecting power system restoration, control wind light generation enters grid-connect mode operation, and charges to energy storage；It is extensive simultaneously
Multiple load supplyings at different levels；
(4) piconet controller monitoring wind light generation, adjusts operational mode in time, maintains the power-balance of power supply and load,
Inhibit power swing with reference to energy storage.
Photovoltaic generation flow includes step：
(1) during irradiation deficiency, supplied and loaded by power grid；
(2) when irradiation meets inverter startup condition, photovoltaic generation powering load；
(3) when photovoltaic power generation quantity is more than load electricity consumption, charge to energy-storage battery；
(4) when energy-storage battery is full of, remaining photovoltaic electricity is counter in the form of remaining electricity online to give power grid.
Wind-power electricity generation flow includes step：
(1) during wind-force deficiency, supplied and loaded by power grid；
(2) when wind speed reaches threshold wind velocity, wind turbine power generation charges to energy-storage battery；
(3) when energy-storage battery is full of, surplus generation powering load；
(4) remaining capacity is counter in the form of remaining electricity online gives power grid；
(5) when controller of fan voltage is more than 60V, wind-driven generator brake stops power generation.
Microgrid spatial load forecasting process includes step：
(1) when distributed new power generation is more than all bearing powers of microgrid, piconet controller controls extra electricity to storage
It can charge；
(2) distributed new power generation is more than all bearing powers of microgrid, and when energy storage is full of, piconet controller control light
It lies prostrate inverter and reduces power output, power generation is maintained to be balanced with electric power；
(3) distributed new power generation is less than bearing power, and during alternating current power-off, piconet controller control load switch,
Cut-out three-level loads, while piconet controller control energy-storage units are contributed, and maintain bearing power steady；
(4) distributed new power generation is less than bearing power, and energy storage uses more than 50%, and when alternating current does not recover yet, it is micro-
Net controller controls cut-out secondary loads, retains important load, while notifies maintenance personnel.
Advantageous effect：The present invention realizes load rating control, and off-network pattern automatically switches, photovoltaic, wind turbine, energy storage association
Regulation and control system, power grid operation, power supply is reliable and stable, and power quality is met the requirements；Sufficient battery capacity, can deal with burst
Description of the drawings
Fig. 1 is and off-network switches schematic diagram；
Fig. 2 is photovoltaic generation schematic diagram；
Fig. 3 is wind-power electricity generation schematic diagram；
Fig. 4 is microgrid spatial load forecasting process schematic.
Technical scheme is further described with reference to the accompanying drawings and examples.
The present invention is applied to the microgrid control method of steel tower base station micro-capacitance sensor, comprises the following steps：
(1) piconet controller monitors power grid in real time；
(2) as shown in Figure 1, when piconet controller detects electric network fault, piconet controller is according to real-time honourable power
Predicted value and battery capacity, judgement can undertake bearing power, cut away unnecessary load, carry out classification load supplying；It controls simultaneously
Photovoltaic generation, wind-power electricity generation enter off-grid operation pattern, if wind-power electricity generation, photovoltaic generation not enough load use, control energy storage
Battery is contributed.
Under abnormal and fault condition, the preferential safe and reliable power supply for ensureing important load, can to reduce fault incidence
Rapid sub-load of cutting away ensures microgrid energy balance.Consider regenerative resource consumption, meeting allows to pass through in power bracket
Adjust energy storage charge and discharge strategy and optimization load electricity consumption strategy, regenerative resource maximum output.Primary goal is important load
Safe and reliable power supply, improves the safety and reliability of electricity consumption, and all scheduling need to check security.
(3) as shown in Fig. 2, when piconet controller detects power system restoration, piconet controller control photovoltaic generation, wind-force
Power generation is run into grid-connect mode, and is charged to energy storage；Recover load supplyings at different levels simultaneously.
As shown in figure 3, the flow of photovoltaic generation, specifically includes following steps：
(1) during irradiation deficiency, alternating current is for load；
(2) when irradiation meets inverter startup requirement, photovoltaic system starts to generate electricity, preferential powering load；
(3) when photovoltaic generation is more than load, charge to energy storage；
(4) it is counter in the form of remaining electricity online to give power grid when energy-storage battery is full of, and photovoltaic generation still has residue.
As shown in figure 4, the flow of wind-power electricity generation, specifically includes following steps：
(1) during wind-force deficiency, alternating current is for load；
(2) after wind speed reaches threshold wind velocity, wind-driven generator starts to generate electricity, and preferentially charges to energy-storage system；
(3) if battery is full of, surplus generation charges to load；
(4) it is counter in the form of remaining electricity online to send alternating current if still there is residue；
(5) if controller of fan voltage is more than 60V, wind-driven generator brake stops power generation.
When the grid collapses, important load power supply is preferentially ensured, micro-capacitance sensor enters the state of emergency, storages at different levels at this time
Energy, distributed generation resource and load respond rapidly to emergency control policy, if necessary the autonomous operation of off-grid.In general, primary mesh
Mark is the safe and reliable power supply of important load, should ensure that important load possesses the power supply point of 2 or 2 or more.
To improve the economy of the whole network operation, in network load peak phase, regenerative resource maximum output, energy storage uses
Discharge mode controls load electricity consumption；In the network load ebb period, energy storage uses charge mode, the abundant accumulation of energy of system.
(4) piconet controller can maintain power supply by monitoring wind-force, photovoltaic generation output to adjust operational mode in time
With the power-balance of load, inhibit power swing with reference to energy storage, wind-force, photovoltaic generation fluctuation is avoided to generate bad shadow to power grid
(5) by the control method, can realize the safe and stable operation of micro-capacitance sensor, can realize micro-capacitance sensor simultaneously, off-network
The steady switching of state.
To improve power supply quality, the switching of micro-capacitance sensor operational modal is taken seamless switching, is estimated by power grid cognition technology
Following operation of power networks trend, reduces switching times to the greatest extent.
As shown in figure 4, microgrid spatial load forecasting process includes step：
(1) when wind-force, the generation of electricity by new energy of photovoltaic distributed are more than all bearing powers of microgrid, piconet controller can be with
Extra electricity is controlled to charge to energy storage；
(2) it is micro- when wind-force, the generation of electricity by new energy of photovoltaic distributed are more than all bearing powers of microgrid, and energy storage is full of
Net controller can control photovoltaic DC-to-AC converter to reduce power output, and power generation is maintained to be balanced with electric power；
(3) when wind-force, the generation of electricity by new energy of photovoltaic distributed are less than bearing power, and alternating current powers off, piconet controller
Control load switch, cut-out three-level load (i.e. the environmental loads such as air-conditioning, illumination), while piconet controller control energy storage list
Member is contributed, and maintains bearing power steady；
(4) when wind-force, the generation of electricity by new energy of photovoltaic distributed are less than bearing power, energy storage uses more than 50%, and alternating current
When not recovering yet, piconet controller control cut-out secondary loads only retain communication apparatus important load, while pass through fortune
Dimension APP notifies maintenance personnel, carries Portable diesel generator and does the standby energy.