CN103023056B - A kind of grid control method and device - Google Patents

A kind of grid control method and device Download PDF

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CN103023056B
CN103023056B CN201210581001.0A CN201210581001A CN103023056B CN 103023056 B CN103023056 B CN 103023056B CN 201210581001 A CN201210581001 A CN 201210581001A CN 103023056 B CN103023056 B CN 103023056B
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power
power source
value
main power
output
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CN103023056A (en
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周丹
李鹏
汪科
张雪松
赵波
葛晓慧
周金辉
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State Grid Corp of China SGCC
Zhejiang Electric Power Research Institute
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State Grid Corp of China SGCC
Zhejiang Electric Power Research Institute
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Abstract

The invention discloses a kind of grid control method, comprising: the power output of main power source is monitored; If the power output of main power source fluctuates, then calculate frequency reference and the voltage reference value of main power source according to undulating value; Control main power source, make its output frequency and output voltage be respectively described frequency reference and voltage reference value; Monitor from the output frequency of power supply and output voltage; According to monitoring from the output frequency of power supply and the changing value of output voltage, calculate the power output reference value from power supply; Control from power supply, make its power output be described value and power reference, meanwhile, in the present invention from the fluctuation of the change of output power of power supply and main power source power output in the same way.Visible, the present invention, by the final power output controlled from power supply, achieves when micro-capacitance sensor emergent power fluctuates, each energy storage inverter shares the object of power fluctuation, thus improve the reliability of micro-capacitance sensor, reduce the capacity configuration requirement of main power source, reduce cost of investment.

Description

A kind of grid control method and device
Technical field
The invention belongs to micro-capacitance sensor control technology field, particularly relate to a kind of grid control method and device.
Background technology
Micro-capacitance sensor has huge social and economic effects, is the most effective means playing distributed electrical source efficiency.Micro-capacitance sensor itself runs control characteristic and requires that it adopts distributed energy storage, and energy storage, as the core link in micro-capacitance sensor, at micro-capacitance sensor stable operation, energy-optimised management, short-duration power, improves in the quality of power supply etc. and plays vital effect.
At present, the energy-storage system of micro-capacitance sensor adopts energy type energy storage and power-type energy storage mode used in combination, due to separate unit energy storage inverter power limited, the occasion of larger stored energy capacitance selects the structure of multiple stage energy storage inverter parallel connection usually, based on above reason, comprising multiple stage energy storage inverter in micro-capacitance sensor is a kind of very common situation.The operational mode of the existing micro-grid system containing many energy storage inverter is: energy type energy storage inverter larger for capacity relative or electric rotating machine run on as main power source and determine voltage/frequency (VF) mode, other energy storage inverter determine power (PQ) mode as running on from power supply.
But under above-mentioned operational mode, when micro-capacitance sensor occurs that transient power fluctuates, the fluctuation of this transient power is born by the energy storage inverter as main power source, thus reduces the power supply reliability of micro-capacitance sensor, and then increase the capacity configuration requirement of main power source, add cost of investment.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of grid control method, to solve the problem, make each energy storage inverter in micro-capacitance sensor can both share the transient power fluctuation of appearance, strengthen the receiving ability that micro-capacitance sensor fluctuates to transient power, and then improve the power supply reliability of micro-capacitance sensor.
For this reason, the invention provides following technical scheme:
A kind of grid control method, comprising:
Real-Time Monitoring is carried out to the power output of main power source;
If the power output that the monitoring result of described Real-Time Monitoring is fluctuates, then according to the undulating value of described power output, calculate the frequency reference of main power source and voltage reference value based on the first preset algorithm, the fluctuation of the power output of the change that described frequency reference and voltage reference value occur based on current output frequency and the output voltage of main power source respectively and main power source is reverse;
Described main power source is controlled, makes the output frequency of described main power source and the value of output voltage be respectively described frequency reference and voltage reference value;
Real-Time Monitoring is carried out to from the output frequency of power supply and output voltage;
According to described Real-Time Monitoring from the output frequency of power supply and the changing value of output voltage, calculate from the power output reference value of power supply based on the second preset algorithm, the fluctuation of the power output of the change that described power output reference value occurs based on the present output power from power supply and described main power source in the same way;
Control from power supply described, make described from the value of the power output of power supply be described value and power reference.
Preferably, described power output comprises active power and reactive power.
Preferably, described first preset algorithm comprises main power source output frequency control algolithm and main power source output voltage control algorithm.
Preferably, if the power output that the monitoring result of described Real-Time Monitoring is main power source fluctuates, then according to the undulating value of the power output of described main power source, calculate the frequency reference of main power source and voltage reference value based on the first preset algorithm, the fluctuation of the power output of the change that described frequency reference and voltage reference value occur based on current output frequency and the output voltage of main power source respectively and main power source oppositely specifically comprises:
If the active power that the monitoring result of described Real-Time Monitoring is main power source increases, then according to the boost value of the active power of described main power source, calculate the frequency reference of main power source based on main power source output frequency control algolithm, described frequency reference is less than the current output frequency of main power source;
If the active power that the monitoring result of described Real-Time Monitoring is main power source reduces, then according to the decreasing value of the active power of described main power source, calculate the frequency reference of main power source based on main power source output frequency control algolithm, described frequency reference is greater than the current output frequency of main power source;
If the reactive power that the monitoring result of described Real-Time Monitoring is main power source increases, then according to the boost value of the reactive power of described main power source, calculate the voltage reference value of main power source based on main power source output voltage control algorithm, described voltage reference value is less than the current output voltage of main power source;
If the reactive power that the monitoring result of described Real-Time Monitoring is main power source reduces, then according to the decreasing value of the reactive power of described main power source, calculate the voltage reference value of main power source based on main power source output voltage control algorithm, described voltage reference value is greater than the current output voltage of main power source.
Preferably, described second preset algorithm comprises from power supply active power controller algorithm with from power supply Reactive Power Control algorithm.
Preferably, described according to described Real-Time Monitoring from the output frequency of power supply and the changing value of output voltage, calculate from the power output reference value of power supply based on the second preset algorithm, the fluctuation of the power output of the change that described power output reference value occurs based on the present output power from power supply and described main power source specifically comprises in the same way:
According to the changing value of the output frequency from power supply of described Real-Time Monitoring, calculate from the active power reference value of power supply based on from power supply active power controller algorithm, the fluctuation of the active power of the change that described active power reference value occurs based on the current active power from power supply and described main power source in the same way;
According to the changing value of the output voltage from power supply of described Real-Time Monitoring, calculate from the reactive power reference qref of power supply based on from power supply Reactive Power Control algorithm, the fluctuation of the reactive power of the change that described reactive power reference qref occurs based on the current reactive power from power supply and described main power source in the same way.
Preferably, describedly to control from power supply described, making described is that described value and power reference specifically comprises from the value of the power output of power supply:
Control from power supply described, make described from the value of the active power of power supply be described active power reference value;
Control from power supply described, make described from the value of the reactive power of power supply be described reactive power reference qref.
A kind of micro-capacitance sensor control device, comprise main power source monitoring modular, main power source computing module, main power source control module, from power supply monitoring module, from power supply computing module with from energy supply control module, wherein:
Described monitoring modular, for carrying out Real-Time Monitoring to the power output of main power source;
Described main power source computing module, for in the monitoring result of described Real-Time Monitoring be main power source power output occur fluctuation time, according to the undulating value of the power output of described main power source, calculate the frequency reference of main power source and voltage reference value based on the first preset algorithm, the fluctuation of the power output of the change that described frequency reference and voltage reference value occur based on current output frequency and the output voltage of main power source respectively and main power source is reverse;
Described main power source control module, for controlling described main power source, makes the output frequency of described main power source and the value of output voltage be respectively described frequency reference and voltage reference value;
Described from power supply monitoring module, for carrying out Real-Time Monitoring to from the output frequency of power supply and output voltage;
Described from power supply computing module, for according to described Real-Time Monitoring from the output frequency of power supply and the changing value of output voltage, calculate from the power output reference value of power supply based on the second preset algorithm, the fluctuation of the power output of the change that described power output reference value occurs based on the present output power from power supply and described main power source in the same way;
Described from energy supply control module, for controlling from power supply described, make described from the value of the power output of power supply be described value and power reference.
The grid control method that the embodiment of the present invention provides, by the undulating value of the power fluctuation according to main power source, calculate, control output frequency and the output voltage of main power source, then foundation is from the output frequency of power supply and the change of output voltage, the power output calculate, controlled from power supply, final change is from the power output of power supply, and the power fluctuation of the change making it occur and main power source is with always realizing when micro-capacitance sensor generation transient power fluctuates, each energy storage inverter as master and slave power supply shares the object of the transient power fluctuation of appearance.Particularly, when micro-capacitance sensor emergent power fluctuates, main power source is slightly faster than the response speed from power supply, the power output of main power source fluctuates, method of the present invention calculates output frequency reference value and the output voltage reference value of main power source based on the first preset algorithm according to the undulating value of main power source power output, and be handed down to main power source by instruction mode, after main power source response, its power output and output voltage change, and the power fluctuation of this change and main power source is reverse, there is corresponding change immediately in the busbar voltage of micro-capacitance sensor and frequency, and the voltage from power supply in parallel with main power source, also there is respective change in frequency, now, method foundation of the present invention is from the output frequency of power supply and the changing value of output voltage, the power output reference value from power supply is calculated based on the second preset algorithm, and control is described power output reference value from the power output of power supply, thus, change the power output from power supply, and in the present invention from the power fluctuation of the change of output power of power supply and main power source in the same way, each energy storage inverter finally can be made to share power fluctuation.
To sum up, grid control method of the present invention is by the final power output controlled from power supply, achieve when micro-capacitance sensor occurs that transient power fluctuates, each energy storage inverter as master and slave power supply shares the object of power fluctuation, thus improve micro-grid system reliability of operation, suitably reduce the capacity configuration requirement of main power source, and then reduce cost of investment.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation from net type micro-capacitance sensor containing many energy storage inverter that the embodiment of the present invention provides;
Fig. 2 is the grid control method flow chart that the embodiment of the present invention provides;
Fig. 3 is the example function curve diagram of the main power source output frequency control algolithm that the embodiment of the present invention provides;
Fig. 4 is the example function curve diagram of the main power source output voltage control algorithm that the embodiment of the present invention provides;
Fig. 5 is an application example flow chart of the grid control method that the embodiment of the present invention provides;
Fig. 6 is the Another Application example flow chart of the grid control method that the embodiment of the present invention provides;
Fig. 7 is the structural representation of the micro-capacitance sensor control device that the embodiment of the present invention provides;
Fig. 8 is the connection diagram of the micro-capacitance sensor control device that provides of the embodiment of the present invention and micro-capacitance sensor.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the invention discloses a kind of grid control method and device, this grid control method and device are applicable to control the micro-capacitance sensor containing many energy storage inverter, be particularly useful for controlling from net type micro-capacitance sensor containing many energy storage inverter, for enabling user more thoroughly, in depth understand the present invention, below first to the present invention the micro-capacitance sensor that is suitable for be introduced.
Refer to Fig. 1, it illustrates the present invention be suitable for containing the typical structure from net type micro-capacitance sensor of many energy storage inverter.As figure, this micro-capacitance sensor comprise main power source 100, first from power supply 200, second from power supply 300, ac bus 400, high-speed communication network 500, Blast Furnace Top Gas Recovery Turbine Unit (TRT) 600, load 700 and piconet controller 800.
Wherein, main power source 100 is the Power Support from net type micro-capacitance sensor, for setting up the voltage of the ac bus 400 of micro-capacitance sensor, main power source 100 comprises the first energy-storage battery 101 and the first two-way inverter 102, first energy-storage battery 101 is specially energy type energy-storage battery, and its output is connected with the input of the first two-way inverter 102; The output of the first two-way inverter 102 works in determines voltage/frequency pattern, i.e. VF pattern, its output is connected to ac bus 400.First comprises the second energy-storage battery 201 from power supply 200 and the second two-way inverter 202, second energy-storage battery 201 can be energy type energy-storage battery, also can be power-type energy-storage battery, its output and the second two-way inverter 202 input be connected; Second two-way inverter 202 works in determines power mode, i.e. PQ pattern, its output is connected with ac bus 400.Second comprises the 3rd energy-storage battery 301 from power supply 300 and the 3rd two-way inverter the 302, three energy-storage battery 301 can be energy type energy-storage battery, and also can be power-type energy-storage battery, its output be connected with the input of the 3rd two-way inverter 302; 3rd two-way inverter 302 works in determines power mode, and its output is connected with ac bus 400.A built-in controller respectively first two-way inverter 102 of main power source 100, the second two-way inverter 202 from power supply 200 and the 3rd two-way inverter 302 from power supply 300, is designated as main power source controller and from power-supply controller of electric.
Blast Furnace Top Gas Recovery Turbine Unit (TRT) 600, for being the device of electric energy by other forms of energy conversion in net type micro-capacitance sensor, in micro-capacitance sensor, it is generally wind-driven generator, photovoltaic generator, small rotary generator distributed Blast Furnace Top Gas Recovery Turbine Unit (TRT).Load 700, for from various power consumption equipment in net type micro-capacitance sensor, it is connected directly between on ac bus 400.High-speed communication network 500, for main power source 100, from power supply 200 and the transmission from the voltage between power supply 300 and piconet controller 800, electric current, power measurements and control command.Piconet controller 800, realizes, to the access of all distributed energy storage inverters in micro-capacitance sensor inside, completing the controlling functions of many energy storage inverter, ensuring electric network coordination reliability service by high-speed communication network 500.
Below based on above-mentioned micro-capacitance sensor, by multiple embodiment, method and apparatus of the present invention will be described in detail.
Embodiment one
The embodiment of the present invention one discloses a kind of grid control method, refers to Fig. 2, and described grid control method comprises the steps:
S1: Real-Time Monitoring is carried out to the power output of main power source.
Wherein, power output comprises active power and reactive power.
For above-mentioned micro-capacitance sensor, Real-Time Monitoring is carried out to the power output of main power source, specifically by adopting corresponding Acquisition Circuit or collector, and this Acquisition Circuit or collector are connected with the main power source controller in the two-way inverter being built in main power source by high-speed communication network, from active power and the reactive power of main power source controller Real-time Collection main power source; And on the basis gathered, judge whether the active power of main power source and reactive power there occurs fluctuation.
S2: if the power output that the monitoring result of described Real-Time Monitoring is main power source fluctuates, then according to the undulating value of the power output of described main power source, calculate the frequency reference of main power source and voltage reference value based on the first preset algorithm, the fluctuation of the power output of the change that described frequency reference and voltage reference value occur based on current output frequency and the output voltage of main power source respectively and main power source is reverse.
Wherein, the first preset algorithm comprises main power source output frequency control algolithm and main power source output voltage control algorithm.
When the power output of main power source there occurs fluctuation, namely when transient power fluctuation has appearred in micro-capacitance sensor, when the power fluctuation of micro-capacitance sensor temporarily born by main power source, this step S2 is based on the object reducing the power fluctuation that main power source is born, namely the object of power fluctuation is shared based on the energy storage inverter as master and slave power supply, control the output frequency of main power source, output voltage, particularly, step S2 comprises:
If the active power that the monitoring result of Real-Time Monitoring is main power source increases, then according to the boost value of the active power of main power source, calculate the frequency reference of main power source based on main power source output frequency control algolithm, this frequency reference is less than the current output frequency of main power source;
If the active power that the monitoring result of Real-Time Monitoring is main power source reduces, then according to the decreasing value of the active power of main power source, calculate the frequency reference of main power source based on main power source output frequency control algolithm, this frequency reference is greater than the current output frequency of main power source;
If the reactive power that the monitoring result of Real-Time Monitoring is main power source increases, then according to the boost value of the reactive power of main power source, calculate the voltage reference value of main power source based on main power source output voltage control algorithm, this voltage reference value is less than the current output voltage of main power source;
If the reactive power that the monitoring result of Real-Time Monitoring is main power source reduces, then according to the decreasing value of the reactive power of main power source, calculate the voltage reference value of main power source based on main power source output voltage control algorithm, this voltage reference value is greater than the current output voltage of main power source.
Particularly, technical staff according to the requirement of engineering of reality or system needs, can set frequency reference and voltage reference value that suitable algorithm calculates main power source.The present embodiment is illustrated to the main power source output frequency control algolithm adopted and main power source output voltage control algorithm respectively, refer to Fig. 3 and Fig. 4, Fig. 3 shows the relation curve between main power source frequency reference and main power source active power fluctuation, and the mathematic(al) representation of the main power source output frequency control algolithm that this relation curve is corresponding is:
f=f 0-mΔP,(1)
Wherein, in formula (1), f represents the frequency reference of main power source, f 0represent the output frequency that main power source is current, m is meritorious frequency droop coefficient, and Δ P is main power source active power fluctuation value.
Correspondingly, Fig. 4 shows the relation curve between main power voltage reference value and main power source reactive power fluctuation, and the mathematic(al) representation of the main power source output voltage control algorithm that this relation curve is corresponding is:
U=U 0-nΔQ,(2)
In formula (2), U represents the voltage reference value of main power source, U 0represent the output voltage that main power source is current, n is the sagging coefficient of reactive voltage, and Δ Q is main power source reactive power fluctuation value.
S3: control described main power source, makes the output frequency of described main power source and the value of output voltage be respectively described frequency reference and voltage reference value.
Particularly, calculated main power source frequency reference and voltage reference value are handed down to main power source by the mode by instruction, and control main power source and respond this instruction, make the value of the output frequency of main power source and output voltage become frequency reference and voltage reference value respectively.
S4: carry out Real-Time Monitoring to from the output frequency of power supply and output voltage.
With to carry out the mode of Real-Time Monitoring to main power source power output in step S1 similar, in this step S4 specifically by corresponding Acquisition Circuit or collector by high-speed communication network 500 be built in from being connected from power-supply controller of electric the two-way inverter of power supply, from from power-supply controller of electric Real-time Collection from the output frequency of power supply and output voltage; And on the basis gathered, calculate the changing value of output frequency from power supply and output voltage.
S5: according to described Real-Time Monitoring from the output frequency of power supply and the changing value of output voltage, calculate from the power output reference value of power supply based on the second preset algorithm, the fluctuation of the power output of the change that described power output reference value occurs based on the present output power from power supply and described main power source in the same way.
When emergent power in micro-capacitance sensor fluctuates, main power source is than slightly fast from power supply response speed, the power output of main power source changes, namely main power source temporarily assume responsibility for the power fluctuation of micro-capacitance sensor, the present invention is based on the object reducing the power fluctuation that main power source is born, first control the output frequency of main power source by step S1, S2 and S3, output voltage changes, and make the power fluctuation of this change and main power source reverse.After main power source response, corresponding change will be there is in bus frequency, the voltage of micro-capacitance sensor, and also can there is same change with the output frequency from power supply energy storage inverter of the energy storage inverter parallel connection as main power source, voltage, step S5 of the present invention is equally based on the object reducing the power fluctuation that main power source is born, calculate from the power output reference value of power supply, be intended to change according to the power output reference value calculated realize from the power output of power supply the object that power fluctuation shares.
Wherein, the second preset algorithm comprises from power supply active power controller algorithm with from power supply Reactive Power Control algorithm.
Particularly, step S5 comprises:
According to the changing value of the output frequency from power supply of Real-Time Monitoring, calculate from the active power reference value of power supply based on from power supply active power controller algorithm, the fluctuation of the active power of the change that this active power reference value occurs based on the current active power from power supply and described main power source in the same way;
According to the changing value of the output voltage from power supply of Real-Time Monitoring, calculate from the reactive power reference qref of power supply based on from power supply Reactive Power Control algorithm, the fluctuation of the reactive power of the change that this reactive power reference qref occurs based on the current reactive power from power supply and main power source in the same way.
Equally, in this step, technical staff can determine to share amplitude from power supply to power fluctuation according to the requirement of engineering of reality, and sets on this basis and suitable calculate active power reference value from power supply and reactive power reference qref from power supply active power controller algorithm with from power supply Reactive Power Control algorithm.No longer adopted algorithm is illustrated in detail herein.
S6: control from power supply described, make described from the value of the power output of power supply be described value and power reference.
Correspondingly, calculated is handed down to from power supply from power supply active power reference value and reactive power reference qref by the mode by instruction, and control to respond this instruction from power supply, make to become active power reference value and reactive power reference qref respectively from the active power of power supply and the value of reactive power.
Fluctuate at micro-capacitance sensor emergent power, main power source temporarily assume responsibility for this power fluctuation constantly, realize the output frequency of main power source by step S1, S2, S3, output voltage changes, and then on this basis, also respective change is there is from the output frequency of power supply, output voltage, and step S4, S5, S6 based on the change occurred from the output frequency of power supply, output voltage, control the power output from power supply, finally realize the object that master and slave power supply shares power fluctuation.
In micro-capacitance sensor actual motion, the power fluctuation that main power source occurs may be independent active power fluctuation or reactive power fluctuation, also exist both possibility simultaneously, in this several situation, control method of the present invention all can be adopted to control micro-capacitance sensor, during concrete enforcement, for different fluctuation situations, with reference to above, the relevant parameter utilizing method of the present invention to calculate, control master and slave power supply is described.
Below be when occurring separately active power fluctuation and occur separately reactive power fluctuation respectively, the application example of grid control method of the present invention.
Refer to Fig. 5, when Fig. 5 shows active power fluctuation, the application example flow process of grid control method of the present invention, specifically comprises:
S51: main power source active power of output is monitored.
S52: judging that the active power of main power source increases or reduces, if judged result is for increasing, then performing step S54; If judged result for reducing, then performs step S53;
S53: the output frequency increasing main power source.
S54: the output frequency reducing main power source.
Wherein, the concrete amplitude of the increase of main power source output frequency or reduction in step S53, S54 can be determined according to the concrete output frequency control algolithm of technical staff's setting.
S55: monitor from power grid dot frequency.
Monitor monitoring from power grid dot frequency the output frequency be in fact from power supply.
S56: judging from the output frequency of power supply it is increase or reduce, if judged result is for increasing, then performing step S58; If judged result, for reducing, performs step S57.
S57: increase the active power exported from power supply.
S58: reduce the active power exported from power supply.
The active power controller algorithm specifically set by technical staff from the amplitude of the increase of power supply active power of output or reduction in step S57, S58 is determined.
When Fig. 6 shows reactive power fluctuation, the application example flow process of grid control method of the present invention, specifically comprises the steps:
S61: main power source output reactive power is monitored.
S62: judging that the reactive power of main power source increases or reduces, if judged result is for increasing, then performing step S64; If judged result for reducing, then performs step S63;
S63: the output voltage increasing main power source.
S64: the output voltage reducing main power source.
S65: monitor from power grid point voltage.
S66: judging from the output voltage of power supply it is increase or reduce, if judged result is for increasing, then performing step S68; If judged result, for reducing, performs step S67.
S67: increase the reactive power exported from power supply.
S68: reduce the reactive power exported from power supply.
The grid control method that the embodiment of the present invention provides, by the undulating value of the power fluctuation according to main power source, calculate, control output frequency and the output voltage of main power source, then foundation is from the output frequency of power supply and the change of output voltage, the power output calculate, controlled from power supply, final change is from the power output of power supply, and the power fluctuation of the change making it occur and main power source is with always realizing when micro-capacitance sensor generation transient power fluctuates, each energy storage inverter as master and slave power supply shares the object of the transient power fluctuation of appearance.Particularly, when micro-capacitance sensor emergent power fluctuates, main power source is slightly faster than the response speed from power supply, the power output of main power source fluctuates, method of the present invention calculates output frequency reference value and the output voltage reference value of main power source based on the first preset algorithm according to the undulating value of main power source power output, and be handed down to main power source by instruction mode, after main power source response, its power output and output voltage change, and the power fluctuation of this change and main power source is reverse, there is corresponding change immediately in the busbar voltage of micro-capacitance sensor and frequency, and the voltage from power supply in parallel with main power source, also there is respective change in frequency, now, method foundation of the present invention is from the output frequency of power supply and the changing value of output voltage, the power output reference value from power supply is calculated based on the second preset algorithm, and control is described power output reference value from the power output of power supply, thus, change the power output from power supply, and in the present invention from the power fluctuation of the change of output power of power supply and main power source in the same way, each energy storage inverter finally can be made to share power fluctuation.
To sum up, grid control method of the present invention is by the final power output controlled from power supply, achieve when micro-capacitance sensor occurs that transient power fluctuates, each energy storage inverter as master and slave power supply shares the object of power fluctuation, thus improve micro-grid system reliability of operation, suitably reduce the capacity configuration requirement of main power source, and then reduce cost of investment.
Embodiment two
On the basis of the grid control method that the embodiment of the present invention two provides in embodiment one, disclose a kind of micro-capacitance sensor control device, refer to Fig. 7, this micro-capacitance sensor control device comprise main power source monitoring modular 701, main power source computing module 702, main power source control module 703, from power supply monitoring module 704, from power supply computing module 705 with from energy supply control module 706, wherein:
Main power source monitoring modular 701, for carrying out Real-Time Monitoring to the power output of main power source.
Main power source computing module 702, for in the monitoring result of Real-Time Monitoring be main power source power output occur fluctuation time, according to the undulating value of the power output of main power source, calculate the frequency reference of main power source and voltage reference value based on the first preset algorithm, the fluctuation of the power output of the change that this frequency reference and voltage reference value occur based on current output frequency and the output voltage of main power source respectively and main power source is reverse.
Main power source control module 703, for controlling main power source, makes the output frequency of main power source and the value of output voltage be respectively frequency reference and voltage reference value.
From power supply monitoring module 704, for carrying out Real-Time Monitoring to from the output frequency of power supply and output voltage.
From power supply computing module 705, for according to Real-Time Monitoring from the output frequency of power supply and the changing value of output voltage, calculate from the power output reference value of power supply based on the second preset algorithm, the fluctuation of the power output of the change that this power output reference value occurs based on the present output power from power supply and main power source in the same way.
From energy supply control module 706, for controlling from power supply, make from the value of the power output of power supply be value and power reference.
Micro-capacitance sensor control device of the present invention adopts high performance Programmable Logic Controller, as shown in Figure 8, its especially by high-speed communication network be built in as the controller in the energy storage inverter of master and slave power supply: main power source controller is connected with from power-supply controller of electric, and then by issuing to the collection of the signal such as voltage, frequency, active power, reactive power of energy storage inverter and control command the control realized micro-capacitance sensor.Particularly, the main power source monitoring modular 701 in micro-capacitance sensor control device is connected with main power source controller with main power source control module 703, realizes the collection of main power source coherent signal and issuing of control command respectively; Be connected with from Energy control with from energy supply control module 706 from power supply monitoring module 704, realize from the collection of power supply coherent signal and issuing of control command respectively.
When applying the present invention and controlling micro-capacitance sensor, the communication cycle between micro-capacitance sensor control device and micro-capacitance sensor can be set according to actual needs, in each communication cycle, the relevant parameter of energy storage inverter in micro-capacitance sensor control device monitoring micro-capacitance sensor, and issue corresponding control command to it, thus occur that transient power fluctuates at micro-capacitance sensor, when energy storage inverter as micro-capacitance sensor main power source temporarily assume responsibility for this power fluctuation, in the communication cycle residing when this power fluctuation occurs, micro-capacitance sensor control device of the present invention is namely by as master, the new control of control command realization to micro-capacitance sensor is issued from the energy storage inverter of power supply.
It should be noted that, be not difficult to draw, namely be the collection of above-mentioned various signal to the energy storage inverter as master and slave power supply, calculating and control to the collection of the signals such as the voltage of master and slave power supply, frequency, active power, reactive power, calculating and control essence in specification of the present invention, both are essentially identical concept.
Visible, the present invention be applicable to be made up of multiple energy storage inverter and run on master-slave control mode from net type micro-grid system, namely micro-grid system is with certain rotary generator or certain energy storage inverter for networking unit supports voltage and the frequency of micro-capacitance sensor, and other energy storage inverter is run to determine power mode.Can effectively realize the parallel running of many energy storage inverter, strengthen system transient modelling fluctuation receiving ability, control structure is simple, and system circulation is controlled.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For device disclosed in embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.
Finally, also it should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
As seen through the above description of the embodiments, those skilled in the art can be well understood to the mode that the application can add required general hardware platform by software and realizes.Based on such understanding, the technical scheme of the application can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product can be stored in storage medium, as ROM/RAM, magnetic disc, CD etc., comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform the method described in some part of each embodiment of the application or embodiment.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (2)

1. a grid control method, is characterized in that, comprising:
Real-Time Monitoring is carried out to the power output of main power source; Described power output comprises active power and reactive power;
Fluctuate if the monitoring result of described Real-Time Monitoring is the power output of main power source, then according to the undulating value of described power output, calculate the frequency reference of main power source and voltage reference value based on the first preset algorithm, the fluctuation of the power output of the change that described frequency reference and voltage reference value occur based on current output frequency and the output voltage of main power source respectively and main power source is reverse; Wherein, described first preset algorithm comprises main power source output frequency control algolithm and main power source output voltage control algorithm; Described main power source output frequency control algolithm is for adopting formula f=f 0-m Δ P calculates main power source output frequency; Described main power source output voltage control algorithm is for adopting formula U=U 0-n Δ Q calculates main power source out-put supply, obtains frequency reference and voltage reference value, and the fluctuation of the power output of the change that frequency reference and voltage reference value are occurred based on current output frequency and the output voltage of main power source respectively and main power source is reverse; F represents the frequency reference of main power source, f 0represent the output frequency that main power source is current, m is meritorious frequency droop coefficient, and Δ P is main power source active power fluctuation value, and U represents the voltage reference value of main power source, U 0represent the output voltage that main power source is current, n is the sagging coefficient of reactive voltage, and Δ Q is main power source reactive power fluctuation value;
Described main power source is controlled, makes the output frequency of described main power source and the value of output voltage be respectively described frequency reference and voltage reference value;
Real-Time Monitoring is carried out to from the output frequency of power supply and output voltage;
According to described Real-Time Monitoring from the output frequency of power supply and the changing value of output voltage, calculate from the power output reference value of power supply based on the second preset algorithm, the fluctuation of the power output of the change that described power output reference value occurs based on the present output power from power supply and described main power source in the same way; Described second preset algorithm comprises from power supply active power controller algorithm with from power supply Reactive Power Control algorithm, be respectively used to calculate from the active power reference value of power supply and reactive power reference qref, the fluctuation of the change that active power reference value is occurred based on the current active power from power supply and the active power of described main power source in the same way; The fluctuation of the reactive power of the change that reactive power reference qref occurs based on the current reactive power from power supply and described main power source in the same way;
Control from power supply described, make described from the value of the power output of power supply be described value and power reference;
If the power output that the monitoring result of described Real-Time Monitoring is main power source fluctuates, then according to the undulating value of the power output of described main power source, the frequency reference of main power source is calculated and voltage reference value specifically comprises: if the active power that the monitoring result of described Real-Time Monitoring is main power source increases based on the first preset algorithm, then according to the boost value of the active power of described main power source, calculate the frequency reference of main power source based on main power source output frequency control algolithm, described frequency reference is less than the current output frequency of main power source; If the active power that the monitoring result of described Real-Time Monitoring is main power source reduces, then according to the decreasing value of the active power of described main power source, calculate the frequency reference of main power source based on main power source output frequency control algolithm, described frequency reference is greater than the current output frequency of main power source; If the reactive power that the monitoring result of described Real-Time Monitoring is main power source increases, then according to the boost value of the reactive power of described main power source, calculate the voltage reference value of main power source based on main power source output voltage control algorithm, described voltage reference value is less than the current output voltage of main power source; If the reactive power that the monitoring result of described Real-Time Monitoring is main power source reduces, then according to the decreasing value of the reactive power of described main power source, calculate the voltage reference value of main power source based on main power source output voltage control algorithm, described voltage reference value is greater than the current output voltage of main power source;
Described according to described Real-Time Monitoring from the output frequency of power supply and the changing value of output voltage, calculate based on the second preset algorithm and specifically comprise from the power output reference value of power supply: according to the changing value of the output frequency from power supply of described Real-Time Monitoring, calculate from the active power reference value of power supply based on from power supply active power controller algorithm, the fluctuation of the active power of the change that described active power reference value occurs based on the current active power from power supply and described main power source in the same way; According to the changing value of the output voltage from power supply of described Real-Time Monitoring, calculate from the reactive power reference qref of power supply based on from power supply Reactive Power Control algorithm, the fluctuation of the reactive power of the change that described reactive power reference qref occurs based on the current reactive power from power supply and described main power source in the same way;
Describedly control from power supply described, making described is that described value and power reference specifically comprises from the value of the power output of power supply: control from power supply described, make described from the value of the active power of power supply be described active power reference value; Control from power supply described, make described from the value of the reactive power of power supply be described reactive power reference qref.
2. a micro-capacitance sensor control device, is characterized in that, comprise main power source monitoring modular, main power source computing module, main power source control module, from power supply monitoring module, from power supply computing module with from energy supply control module, wherein:
Described monitoring modular, for carrying out Real-Time Monitoring to the power output of main power source; Described power output comprises active power and reactive power;
Described main power source computing module, for in the monitoring result of described Real-Time Monitoring be main power source power output occur fluctuation time, according to the undulating value of the power output of described main power source, calculate the frequency reference of main power source and voltage reference value based on the first preset algorithm, the fluctuation of the power output of the change that described frequency reference and voltage reference value occur based on current output frequency and the output voltage of main power source respectively and main power source is reverse; Wherein, described first preset algorithm comprises main power source output frequency control algolithm and main power source output voltage control algorithm; Described main power source output frequency control algolithm is for adopting formula f=f 0-m Δ P calculates main power source output frequency; Described main power source output voltage control algorithm is for adopting formula U=U 0-n Δ Q calculates main power source out-put supply, obtains frequency reference and voltage reference value, and the fluctuation of the power output of the change that frequency reference and voltage reference value are occurred based on current output frequency and the output voltage of main power source respectively and main power source is reverse; F represents the frequency reference of main power source, f 0represent the output frequency that main power source is current, m is meritorious frequency droop coefficient, and Δ P is main power source active power fluctuation value, and U represents the voltage reference value of main power source, U 0represent the output voltage that main power source is current, n is the sagging coefficient of reactive voltage, and Δ Q is main power source reactive power fluctuation value;
Described main power source control module, for controlling described main power source, makes the output frequency of described main power source and the value of output voltage be respectively described frequency reference and voltage reference value;
Described from power supply monitoring module, for carrying out Real-Time Monitoring to from the output frequency of power supply and output voltage;
Described from power supply computing module, for according to described Real-Time Monitoring from the output frequency of power supply and the changing value of output voltage, calculate from the power output reference value of power supply based on the second preset algorithm, the fluctuation of the power output of the change that described power output reference value occurs based on the present output power from power supply and described main power source in the same way; Described second preset algorithm comprises from power supply active power controller algorithm with from power supply Reactive Power Control algorithm, be respectively used to calculate from the active power reference value of power supply and reactive power reference qref, the fluctuation of the change that active power reference value is occurred based on the current active power from power supply and the active power of described main power source in the same way; The fluctuation of the reactive power of the change that reactive power reference qref occurs based on the current reactive power from power supply and described main power source in the same way;
Described from energy supply control module, for controlling from power supply described, make described from the value of the power output of power supply be described value and power reference;
Described main power source computing module comprises: the first computing unit, for in the monitoring result of described Real-Time Monitoring be main power source active power increase time, according to the boost value of the active power of described main power source, calculate the frequency reference of main power source based on main power source output frequency control algolithm, described frequency reference is less than the current output frequency of main power source; Second computing unit, for in the monitoring result of described Real-Time Monitoring be main power source active power reduce time, according to the decreasing value of the active power of described main power source, calculate the frequency reference of main power source based on main power source output frequency control algolithm, described frequency reference is greater than the current output frequency of main power source; 3rd computing unit, for in the monitoring result of described Real-Time Monitoring be main power source reactive power increase time, according to the boost value of the reactive power of described main power source, calculate the voltage reference value of main power source based on main power source output voltage control algorithm, described voltage reference value is less than the current output voltage of main power source; 4th computing unit, for in the monitoring result of described Real-Time Monitoring being the reactive power reduction of main power source, during decreasing value then according to the reactive power of described main power source, calculate the voltage reference value of main power source based on main power source output voltage control algorithm, described voltage reference value is greater than the current output voltage of main power source;
Describedly to comprise from power supply computing module: the 5th computing unit, for the changing value of the output frequency from power supply according to described Real-Time Monitoring, calculate from the active power reference value of power supply based on from power supply active power controller algorithm, the fluctuation of the active power of the change that described active power reference value occurs based on the current active power from power supply and described main power source in the same way; 6th computing unit, for the changing value of the output voltage from power supply according to described Real-Time Monitoring, calculate from the reactive power reference qref of power supply based on from power supply Reactive Power Control algorithm, the fluctuation of the reactive power of the change that described reactive power reference qref occurs based on the current reactive power from power supply and described main power source in the same way;
Describedly to comprise from energy supply control module: the first control unit, for controlling from power supply described, make described from the value of the active power of power supply be described active power reference value; Second control unit, for controlling from power supply described, make described from the value of the reactive power of power supply be described reactive power reference qref.
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