CN104079008B - A kind of method of supplying power to based on micro-capacitance sensor and electric power system - Google Patents

A kind of method of supplying power to based on micro-capacitance sensor and electric power system Download PDF

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CN104079008B
CN104079008B CN201410293608.8A CN201410293608A CN104079008B CN 104079008 B CN104079008 B CN 104079008B CN 201410293608 A CN201410293608 A CN 201410293608A CN 104079008 B CN104079008 B CN 104079008B
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current converter
energy accumulation
source energy
accumulation current
micro
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CN104079008A (en
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罗梅林
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Suzhou Inovance Technology Co Ltd
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Shenzhen Inovance Technology Co Ltd
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Abstract

The invention discloses a kind of method of supplying power to based on micro-capacitance sensor and electric power system.Described system includes clean energy resource electricity generation system (100), micro-capacitance sensor and is positioned at the AC load (400) of power supply area.Described micro-capacitance sensor includes multiple VF source energy accumulation current converter (200) and in parallel with described VF source energy accumulation current converter (200) and be controlled by multiple PQ sources energy accumulation current converter (300) of described VF source energy accumulation current converter (200).Described VF source energy accumulation current converter (200) is for when the current aggregate demand power of AC load (400) is less than its actual peak power output, for accessing AC load (400) power supply of micro-capacitance sensor.The plurality of PQ source energy accumulation current converter is selected to open when the current aggregate demand power of AC load (400) exceedes its actual peak power output by described VF source energy accumulation current converter (200) respectively, with micro-capacitance sensor (400) power supply as AC load building dilatation.The present invention can improve the stability that electric power system is run, and extends the service life of PQ source energy accumulation current converter.

Description

A kind of method of supplying power to based on micro-capacitance sensor and electric power system
Technical field
The present invention relates to electric power network technique field, more particularly, it relates to a kind of supplier of electricity based on micro-capacitance sensor Method and electric power system.
Background technology
In the prior art, for effectively solving the customer power supply problem of areas without electricity, the most usual solution Scheme is at areas without electricity, builds micro power network by the method that multiple VF sources energy accumulation current converter is in parallel, and It is areas without electricity customer power supply by the micro power network of structure.
The above-mentioned micro power network built by VF source energy accumulation current converter parallel way, increasing in capacity requirement Time, the only capacity of the number of units or increase unit VF source energy accumulation current converter by being continuously increased parallel connection is expired Foot.But, by the one-sided quantity increasing VF source energy accumulation current converter in parallel or capacity, micro-capacitance sensor is entered (increase for now board number or increase capacity are all by one by technical limitations for the mode of row dilatation Fixed restriction), i.e. micro-capacitance sensor design capacity is limited, it is impossible to meet areas without electricity large user group (the most remote County town, island) the requirement of concentration supply power.
Summary of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of prior art, it is provided that Yi Zhongji Method of supplying power to and electric power system in micro-capacitance sensor.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of confession based on micro-capacitance sensor Method for electrically, described micro-capacitance sensor includes that multiple VF source energy accumulation current converters of parallel connection and the energy storage of multiple PQ sources become Stream device;The method comprises the steps:
S1) all VF sources energy accumulation current converter in micro-capacitance sensor is started, and by described VF source energy storage unsteady flow Device is that the AC load accessing this micro-capacitance sensor is powered;
S2) the current aggregate demand power in described AC load exceeds the reality of described VF source energy accumulation current converter During peak power output, open the one or more PQ in micro-capacitance sensor by described VF source energy accumulation current converter Source energy accumulation current converter carries out dilatation to micro-capacitance sensor, and is born by the exchange that the micro-capacitance sensor of dilatation is power supply area Carry centrally connected power supply;
Each described PQ source energy accumulation current converter has at least one the 2nd PCS unit, and the storage of each VF source Can have at least one PCS unit by current transformer;Also comprised the steps: before described step S1
S0) described in No. ID of all 2nd PCS unit of all PQ sources energy accumulation current converter is pre-stored in Each PCS unit of VF source energy accumulation current converter, and specify one in all PCS unit As main PCS unit;Described main PCS unit becomes for the VF source energy storage at this main PCS unit place Power distribution is carried out between stream device and the plurality of PQ source energy accumulation current converter, and according to power distribution result pair The plurality of PQ source energy accumulation current converter carries out switching on and shutting down control.
In the above-mentioned method of supplying power to based on micro-capacitance sensor of the present invention, described step S2 also includes: described master PCS unit first calculates the actual peak power output of described VF source energy accumulation current converter, then by described VF source The current aggregate demand power of the actual peak power output of energy accumulation current converter and the AC load of power supply area enters Row compares;
Wherein, PVFoutput=W*PVF;PVFoutputActual maximum output for described VF source energy accumulation current converter Power, W is the actual peak power output percentage with rated output power of described VF source energy accumulation current converter Ratio, PVFRated output power for described VF source energy accumulation current converter;
VF source energy storage as described in the current aggregate demand power of described main PCS unit judges AC load is less than The actual peak power output of current transformer, then return step S1.
In the above-mentioned method of supplying power to based on micro-capacitance sensor of the present invention, VF source energy storage described in described step S2 Current transformer is opened the one or more PQ sources energy accumulation current converter in micro-capacitance sensor and micro-capacitance sensor is carried out the step of dilatation Including:
S21) described main PCS unit is calculated by preset power distribution algorithm and needs unlatching in micro-capacitance sensor Quantity X of PQ source energy accumulation current converter;
S22) described main PCS unit randomly chooses X in its many groups of the 2nd PCS unit ID prestored Organize the 2nd PCS unit ID, and to the X group second corresponding to this X group the 2nd PCS unit ID Part or all of 2nd PCS unit in PCS unit sends start-up command, comprises this X group the to open X PQ source energy accumulation current converter of two PCS unit;
S23) described X PQ source energy accumulation current converter and described VF source energy accumulation current converter in parallel therewith Collectively form micro-electricity of current aggregate demand power that peak power output can reach the AC load of power supply area Net.
In the above-mentioned method of supplying power to based on micro-capacitance sensor of the present invention, described step S21 is used for calculate and need to open The power distribution algorithm of quantity X of the PQ source energy accumulation current converter opened is as follows:
X=(Pdemandpower-η*m*a*Ppcs1)/(η*b*Ppcs2);Wherein,
PdemandpowerCurrent aggregate demand power for the AC load of power supply area;
M is the quantity of the VF source energy accumulation current converter in micro-capacitance sensor;
The quantity of the PCS unit that a is comprised by VF source energy accumulation current converter;
PPCS1Rated output power for a described PCS unit;
η is the percentage-proportion interval scope of the acceptable real output of micro-capacitance sensor and rated output power;
The quantity of the 2nd PCS unit that b is comprised by PQ source energy accumulation current converter;
PPCS2Rated output power for described 2nd PCS unit.
In the above-mentioned method of supplying power to based on micro-capacitance sensor of the present invention, described step S2 also includes: judge described Whether main PCS unit breaks down and when described main PCS unit breaks down, and stores up in described VF source All PCS unit that energy current transformer is comprised select any one in addition to this main PCS unit Oneth PCS unit, and a PCS unit is appointed as new main PCS unit with substitute break down Former main PCS unit.
In the above-mentioned method of supplying power to based on micro-capacitance sensor of the present invention, also include as follows after described step S2 Step:
S3) in the output work of current at least one the 2nd PCS unit of aggregate demand power drop of AC load During rate, calculate the quantity X ' of the PQ source energy accumulation current converter that need to close down according to power distribution algorithm, X the PQ source energy accumulation current converter started randomly chooses X ' individual PQ source energy accumulation current converter, and instructs The part or all of 2nd PCS unit of this X ' individual PQ source energy accumulation current converter performs to close down operation.
The present invention also constructs a kind of electric power system based on micro-capacitance sensor, and described system includes that clean energy resource generates electricity System, micro-capacitance sensor and be positioned at the AC load of power supply area, described micro-capacitance sensor includes that multiple VF source is stored up Can current transformer and in parallel with described VF source energy accumulation current converter and to be controlled by this VF source energy accumulation current converter many Individual PQ source energy accumulation current converter;
Described VF source energy accumulation current converter is for the current aggregate demand power in AC load less than its reality During big output, power for accessing the AC load of micro-capacitance sensor;
The plurality of PQ source energy accumulation current converter is respectively by described VF source energy accumulation current converter working as in AC load Front aggregate demand power is more than selecting during the actual peak power output of energy accumulation current converter of VF source to open, to set up expansion The micro-capacitance sensor held is that AC load is powered;
Each described VF source energy accumulation current converter includes one group of PCS unit in parallel, each described PQ Source energy accumulation current converter all includes one group of the 2nd PCS unit in parallel;
A described PCS unit includes a main PCS unit, and this main PCS unit includes main control The first commutator, the first inverter and the first accumulator that device and described master controller are electrically connected;
Each described 2nd PCS unit all includes being electrically connected from controller with described from controller Second commutator, the second inverter and the second accumulator;
Described master controller exceedes described VF source energy storage unsteady flow for the current aggregate demand power in AC load During the actual peak power output of device, send start-up command to described at least one from controller;
Described master controller is additionally operable to peak power output and the AC load of the micro-capacitance sensor after judging dilatation Power difference between current aggregate demand power meets or exceeds the defeated of at least one described 2nd PCS unit When going out power, send shutdown command to described at least one from controller;
Described when controller is used for the on/off instruction receiving described master controller, open/close down this From the 2nd PCS unit at controller place.
In the above-mentioned electric power system based on micro-capacitance sensor of the present invention, described VF source energy accumulation current converter and each institute State the communication mode between the energy accumulation current converter of PQ source include RS485, Ethernet, CAN, PLC, And ZigBee.
Owing to present invention method of supplying power to based on micro-capacitance sensor and electric power system have employed by increasing and the storage of VF source Can current transformer in parallel and be controlled by the quantity of PQ source energy accumulation current converter of VF source energy accumulation current converter to micro-capacitance sensor Carry out the technical scheme of unlimited dilatation, so overcoming one-sided increase VF source energy storage unsteady flow in prior art Number of units or the capacity of device carry out, to micro-capacitance sensor, the defect that the mode of dilatation is restricted, it is achieved that micro-capacitance sensor holds The unlimited dilatation of amount, being automatically adjusted of micro-capacitance sensor output, and improve stablizing of electric power system operation Property, reduce the power consumption of electric power system, extend the purpose in the service life of PQ source energy accumulation current converter.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is that the first structure of the electric power system based on micro-capacitance sensor that present pre-ferred embodiments provides is shown It is intended to;
Fig. 2 is that the second structure of the electric power system based on micro-capacitance sensor that present pre-ferred embodiments provides is shown It is intended to;
Fig. 3 be the electric power system based on micro-capacitance sensor shown in Fig. 1 or Fig. 2 main PCS unit/any one The structured flowchart of the oneth PCS unit;
Fig. 4 is that any one the 2nd PCS of the electric power system based on micro-capacitance sensor shown in Fig. 1 or Fig. 2 is mono- The structured flowchart of unit;
Fig. 5 is the flow chart of the method for supplying power to based on micro-capacitance sensor that present pre-ferred embodiments provides.
Detailed description of the invention
In order to solve the one-sided number of units increasing VF source energy accumulation current converter 200 or appearance present in prior art Amount carries out, to micro-capacitance sensor, the defect that the mode of dilatation is restricted, and the main innovation point of the present invention is: 1) By increasing PQ that is in parallel with VF source energy accumulation current converter 200 and that be controlled by VF source energy accumulation current converter 200 The quantity of source energy accumulation current converter 300 carries out unlimited dilatation to micro-capacitance sensor;2) VF source energy accumulation current converter 200 In main PCS unit 201 can exist according to the change of the aggregate demand power of the AC load 400 of power supply area The VF source energy accumulation current converter 200 at this PCS unit 201 place and multiple PQ sources energy accumulation current converter 300 it Between carry out the regulation of power distribution flexibly, distribute amount according to the output of PQ source energy accumulation current converter 300 Correspondingly open or close down part PQ source energy accumulation current converter 300, to reduce system power dissipation, it is achieved system provides Maximally utilizing of source.
Owing to present invention employs by increasing in parallel with VF source energy accumulation current converter 200 and being controlled by VF source The quantity of the PQ source energy accumulation current converter 300 of energy accumulation current converter 200 carries out unlimited dilatation to micro-capacitance sensor and sets Meter, so solving in prior art by the one-sided number of units increasing VF source energy accumulation current converter 200 or appearance Amount carries out, to micro-capacitance sensor, the technical problem that the mode of dilatation is restricted, it is achieved that micro-capacitance sensor capacity unlimited Dilatation, being automatically adjusted of micro-capacitance sensor output, and improve the stability that electric power system is run, reduce The power consumption of electric power system, extends the purpose in the service life of PQ source energy accumulation current converter 300.
In order to make the purpose of the present invention clearer, below in conjunction with drawings and Examples, to the present invention It is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain this Bright, it is not intended to limit the present invention.
As it is shown in figure 1, present invention electric power system based on micro-capacitance sensor include clean energy resource electricity generation system 100, Connect the micro-capacitance sensor of clean energy resource electricity generation system 100 by ac bus and be positioned at the friendship of power supply area Current load 400.This micro-capacitance sensor include multiple VF sources energy accumulation current converter 200 and with the plurality of VF source energy storage Current transformer is in parallel and is controlled by multiple PQ sources energy accumulation current converter 300 of one of them VF source energy accumulation current converter. Each VF source energy accumulation current converter 200 all includes several specifications (accumulator capacity, output) phase A same PCS (Power Conversion System) unit, each PQ source energy accumulation current converter 300 All include the 2nd PCS (Power that several specifications (accumulator capacity, output) are identical Conversion System) unit.The plurality of VF source energy accumulation current converter 200 and the plurality of PQ source energy storage Communication mode bag RS485, Ethernet, CAN and PLC (Power between current transformer 300 Line Communication)。
This clean energy resource electricity generation system 100 is for for the VF source energy accumulation current converter 200 in micro-capacitance sensor and multiple PQ source energy accumulation current converter 300 is charged.
This VF source energy accumulation current converter 200 is less than it for the current aggregate demand power in AC load 400 During actual peak power output, power for accessing the AC load 400 of micro-capacitance sensor;
The plurality of PQ source energy accumulation current converter 300 respectively by this VF source energy accumulation current converter 200 in AC load The current aggregate demand power of 400 selects to open, to build expansion when meeting or exceeding its actual peak power output The micro-capacitance sensor held is that AC load 400 is powered.
Wherein, PVFoutput=w*PVF;PVFoutput=export for the actual maximum of VF source energy accumulation current converter 200 Power, PVFFor the rated output power of VF source energy accumulation current converter 200, W is VF source energy accumulation current converter The actual peak power output of 200 and the percentage ratio of rated output power.
Electric power system based on micro-capacitance sensor shown in Fig. 2 of the present invention and the power supply based on micro-capacitance sensor shown in Fig. 1 The difference of system is: adopt between VF source energy accumulation current converter 200 and multiple PQ sources energy accumulation current converter 300 With ZigBee the short distance wireless communication technology, it is advantageous in that: overcome micro-capacitance sensor internal wiring complicated Problem, greatly reduce the use of cable, reduce the fire incident incidence rate of micro-capacitance sensor.
As it is shown on figure 3, any one the VF source energy storage unsteady flow in the plurality of VF source energy accumulation current converter 200 Device specifies one of them the PCS unit in all PCS unit 201 to be main PCS unit 201.Should Main PCS unit 201 is for the VF source energy accumulation current converter 200 at its place and multiple PQ source energy storage unsteady flows Power distribution is carried out and according to power distribution result to the plurality of PQ source energy accumulation current converter 300 between device 300 Carry out switching on and shutting down control.
In the present invention, the operation of PCS unit 201 as main in this is broken down, then this main PCS unit institute VF source energy accumulation current converter 200 randomly choose except this main PCS in all PCS unit 201 Any one PCS unit 201 outside unit 201, it is intended that a PCS unit 201 is new Main PCS unit 201 with the former main PCS unit 201 that breaks down of replacement, it is ensured that the peace of electric power system Full stable operation.
This main PCS unit 201 includes first that master controller 2011 electrically connects with this master controller 2011 Commutator the 2012, first inverter 2013 and the first accumulator 2014.
As shown in Figure 4, each the 2nd PCS unit 301 all includes from controller 3011 and is somebody's turn to do from control Second commutator the 3012, second inverter 3013 and the second accumulator 3014 of device 3011 processed electrical connection.
This first commutator 2012/ second commutator 3012 is for automatically cleaning energy electricity generation system 100 in the future Alternating current be converted to unidirectional current after be entered into the first accumulator 2014/ second accumulator 3014 and carry out Storage.The unidirectional current that this first inverter 2013/ second inverter 3013 is used to accumulator provides turns After being changed to alternating current, it is delivered to AC load 400 through ac bus.
This master controller 2011 for the current aggregate demand power in AC load 400 more than the energy storage of VF source During the peak power output of current transformer 200, calculated the PQ source energy storage that need to open by power distribution algorithm and become The quantity of stream device 300, and to each of the 2nd PCS unit 301 of equal number from controller 3011 Go out start-up command.It is the plurality of when controller 3011 is used for the start-up command receiving master controller 2011, Respectively the plurality of multiple 2nd PCS unit 301 from controller 3011 place are performed power-on operation.
This master controller 2011 be additionally operable to AC load 400 current aggregate demand power drop at least one During the output of the 2nd PCS unit 301, calculated the PQ source energy storage that need to close down by power distribution algorithm The quantity of current transformer 300, and to each of the 2nd PCS unit 301 of equal number from controller 3011 Send shutdown command.The plurality of from controller 3011 for receiving the shutdown command of master controller 2011 Time, respectively the plurality of multiple 2nd PCS unit 301 from controller 3011 place are performed shutdown behaviour Make.
The derivation of the above-mentioned power distribution algorithm of the present invention is as follows:
Based on energy conversion relation between micro-capacitance sensor and AC load 400, law of conservation of energy can get Following equation (1): Pdemandpower=η * (m*a*Ppcs1+X*b*Ppcs2);
Solving equation formula (1) can obtain: X=(Pdemandpower-η*m*a*Ppcs1)/(η*b*Ppcs2), it is the present invention Power distribution algorithm formula;Wherein,
PdemandpowerCurrent aggregate demand power for the AC load 400 of power supply area;
M is the quantity of the VF source energy accumulation current converter in micro-capacitance sensor;
X is the quantity of the PQ source energy accumulation current converter 300 that need to open;
The quantity of the PCS unit 201 that a is comprised by VF source energy accumulation current converter 200;
PPCS1It it is the rated output power of a PCS unit 201;
η is the percentage-proportion interval of the acceptable real output of micro-capacitance sensor and rated output power;
The quantity of the PCS unit 201 that b is comprised by PQ source energy accumulation current converter 300;
PPCS2It it is the rated output power of the 2nd PCS unit 301.
In the better embodiment of present invention electric power system based on micro-capacitance sensor, η span is (75%, 85%), W value is 80%.Multiple VF sources energy accumulation current converter 200 in micro-capacitance sensor and many Equal " reserving " a part of electric energy of individual PQ source energy accumulation current converter 300 is advantageous in that: reply clean energy resource supplies Contingent various electric power transmission faults between electricity system and micro-capacitance sensor, it is ensured that whole electric power system continues Run well.
Below by as a example by the better embodiment of the present invention, method of supplying power to based on micro-capacitance sensor to the present invention Illustrate:
As it is shown in figure 5, in step S101, present invention electric power system based on micro-capacitance sensor management personnel are pre- 4 the 2nd PCS unit 301 (outputs first each PQ source energy accumulation current converter 300 comprised For 500KW) No. ID 4 the PCS unit 201 being stored in VF source energy accumulation current converter 200 (defeated Going out power is 250KW), and appointment one is used for performing VF in these 4 PCS unit 201 Power distribution task between source energy accumulation current converter 200 and multiple PQ sources energy accumulation current converter 300 and multiple PQ The main PCS unit 201 that the switching on and shutting down of source energy accumulation current converter 300 control.
In step s 102, electric power system management personnel based on micro-capacitance sensor first open VF source energy storage unsteady flow Device 200, is that the AC load 400 accessing micro-capacitance sensor is powered by VF source energy accumulation current converter 200.
In step s 103, exchange is judged such as the main PCS unit 201 in VF source energy accumulation current converter 200 Load 400 current aggregate demand power not less than VF source energy accumulation current converter 200 peak power output (i.e. 1MW), then step S102 is returned;PCS unit 201 as main in this judges the current total of AC load 400 Demand power more than the peak power output of VF source energy accumulation current converter 200, then performs next step S104。
In step S104, main PCS unit 201 calculates according to its built-in power distribution formula and needs to open The quantity of PQ source energy accumulation current converter 300.
Citing: assume η=80%, Pdemandpower=10MW, PPCS1=250KW, PPCS2=500KW, Main PCS unit 201 can be calculated X 6 according to each above-mentioned data and power distribution algorithm formula, i.e. The quantity of the PQ source energy accumulation current converter 300 that need to open is 6.
In step S105, main PCS unit 201 is in its many groups of the 2nd PCS unit ID prestored Randomly choose 6 group of the 2nd PCS unit ID, to this 6 group of the 2nd PCS unit No. ID corresponding 6 Organize the 2nd PCS unit 301 and be simultaneously emitted by start-up command.This 6 group of the 2nd PCS unit 301 is by each From controller 3011 receive respectively above-mentioned start-up command and perform power-on operation.
In step s 106,6 the PQ source energy storage being made up of above-mentioned 6 group of the 2nd PCS unit 301 become Stream device 300 start shooting and VF source energy accumulation current converter 200 connected in parallel to form the micro-capacitance sensor of dilatation be service area The AC load 400 in territory is powered.
In step s 107, the current aggregate demand power of AC load 400 is judged such as main PCS unit 201 Drop-out value less than 500KW time, maintain the start quantity of PQ source energy accumulation current converter 300, and return Step S106;The drop-out value of the current aggregate demand power of AC load 400 is judged such as main PCS unit 201 During more than 500KW, perform next step S108.
In step S108, main PCS unit 201 calculates the PQ needing to close down by power distribution algorithm The quantity of source energy accumulation current converter 300, correspondingly to reduce the output of micro-capacitance sensor, reduces based on micro-electricity The power consumption of the electric power system of net, it is ensured that the power supply safety of power supply area, and extend making of PQ source energy storage device Use the life-span.
Assume the current aggregate demand power drop of AC load 400 of power supply area to 8KW, the most main PCS Unit 201 can calculate, according to the present invention above-mentioned power distribution formula, the PQ source energy storage being currently needed for closing down and become The quantity of stream device 300 is 1.
In step S109, main PCS unit 201 is searched corresponding to above-mentioned 6 PQ source energy accumulation current converters 6 group of the 2nd PCS unit ID of 300, randomly chooses one in this 6 group of the 2nd PCS unit ID Organize the 2nd PCS unit ID, mono-to No. ID corresponding 4 the 2nd PCS of this group the 2nd PCS unit Unit 301 sends shutdown command, to close down the PQ source energy storage change being made up of these 4 the 2nd PCS unit 301 Stream device 300.Treat that this PQ source energy accumulation current converter 300 enters state of closing down, return step S103.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all at this Any amendment, equivalent and the improvement etc. made within the spirit of invention and principle, should be included in this Within the protection domain of invention.

Claims (8)

1. a method of supplying power to based on micro-capacitance sensor, it is characterised in that described micro-capacitance sensor includes in parallel many Individual VF source energy accumulation current converter (200) and multiple PQ source energy accumulation current converter (300);The method include as Lower step:
S1) all VF sources energy accumulation current converter (200) in micro-capacitance sensor are started, and by described VF source Energy accumulation current converter (200) is AC load (400) power supply accessing this micro-capacitance sensor;
S2) the current aggregate demand power in described AC load (400) exceeds described VF source energy storage unsteady flow During the actual peak power output of device, opened in micro-capacitance sensor by described VF source energy accumulation current converter (200) One or more PQ sources energy accumulation current converter (300) micro-capacitance sensor is carried out dilatation, and micro-by dilatation Electrical network is AC load (400) centrally connected power supply of power supply area;
Each described PQ source energy accumulation current converter (300) has at least one the 2nd PCS unit (301), And each VF source energy accumulation current converter (200) has at least one PCS unit (201);Described Also comprise the steps: before step S1
S0) by the ID of all 2nd PCS unit (301) of all PQ sources energy accumulation current converter (300) Number it is pre-stored in each PCS unit (201) of described VF source energy accumulation current converter (200), and All PCS unit (201) are specified one as main PCS unit (201);Described main PCS Unit in VF source energy accumulation current converter (200) at this main PCS unit (201) place with the plurality of Power distribution is carried out between PQ source energy accumulation current converter (300), and according to power distribution result to the plurality of PQ source energy accumulation current converter (300) carries out switching on and shutting down control.
Method of supplying power to based on micro-capacitance sensor the most according to claim 1, it is characterised in that described step Rapid S2 also includes: described main PCS unit (201) first calculates described VF source energy accumulation current converter (200) Actual peak power output, the actual maximum work output by described VF source energy accumulation current converter (200) Rate compares with the current aggregate demand power of the AC load of power supply area (400);
Wherein, PVFoutput=W*PVF;PVFoutputReality for described VF source energy accumulation current converter (200) Peak power output, W is actual peak power output and the volume of described VF source energy accumulation current converter (200) Determine the percentage ratio of output, PVFRated output power for described VF source energy accumulation current converter (200);
As described main PCS unit (201) judges that the current aggregate demand power of AC load (400) does not surpasses Cross the actual peak power output of described VF source energy accumulation current converter (200), then return step S1.
Method of supplying power to based on micro-capacitance sensor the most according to claim 2, it is characterised in that described step Described in rapid S2, the one or more PQ source energy storage in micro-capacitance sensor are opened in VF source energy accumulation current converter (200) The step that current transformer (300) carries out dilatation to micro-capacitance sensor includes:
S21) described main PCS unit (201) is calculated in micro-capacitance sensor by preset power distribution algorithm needs Quantity X in PQ source energy accumulation current converter (300) opened;
S22) described main PCS unit (201) in its many groups of the 2nd PCS unit ID prestored with Machine selects X group the 2nd PCS unit ID, and to the X corresponding to this X group the 2nd PCS unit ID The part or all of 2nd PCS unit (301) organized in the 2nd PCS unit (301) sends start-up command, To open X PQ source energy accumulation current converter (300) comprising this X group the 2nd PCS unit (301);
S23) described X PQ source energy accumulation current converter (300) and described VF source energy storage in parallel therewith Current transformer (200) collectively form peak power output can reach power supply area AC load (400) work as The micro-capacitance sensor of front aggregate demand power.
Method of supplying power to based on micro-capacitance sensor the most according to claim 3, it is characterised in that described step For calculating the power distribution calculation of quantity X in PQ source energy accumulation current converter (300) that need to open in rapid S21 Method is as follows:
X=(Pdemandpower-η*m*a*Ppcs1)/(η*b*Ppcs2);Wherein,
PdemandpowerCurrent aggregate demand power for the AC load (400) of power supply area;
M is the quantity of the VF source energy accumulation current converter in micro-capacitance sensor;
The quantity of the PCS unit (201) that a is comprised by VF source energy accumulation current converter (200);
PPCS1Rated output power for a described PCS unit (201);
η is the percentage-proportion interval scope of the acceptable real output of micro-capacitance sensor and rated output power;
The quantity of the 2nd PCS unit (301) that b is comprised by PQ source energy accumulation current converter (300);
PPCS2Rated output power for described 2nd PCS unit (301).
Method of supplying power to based on micro-capacitance sensor the most according to claim 4, it is characterised in that described step Rapid S2 also includes: judge whether described main PCS unit (201) is broken down and mono-at described main PCS When unit (201) breaks down, at all PCS that described VF source energy accumulation current converter (200) is comprised Unit (201) selects any one the PCS unit (201) in addition to this main PCS unit (201), And a PCS unit (201) is appointed as new main PCS unit (201) with substitute break down Former main PCS unit (201).
Method of supplying power to based on micro-capacitance sensor the most according to claim 5, it is characterised in that described Also comprise the steps: after step S2
S3) at least one the 2nd PCS unit (301) of current aggregate demand power drop of AC load (400) Output time, calculate PQ source energy accumulation current converter (300) that need to close down according to power distribution algorithm Quantity X ', randomly chooses the individual PQ of X ' in X PQ source energy accumulation current converter (300) having been turned on Source energy accumulation current converter (300), and instruct this X ' individual PQ source energy accumulation current converter (300) part or Whole 2nd PCS unit (301) perform to close down operation.
7. an electric power system based on micro-capacitance sensor, it is characterised in that described system includes that clean energy resource is sent out Electricity system (100), micro-capacitance sensor and be positioned at the AC load (400) of power supply area, described micro-capacitance sensor Including multiple VF sources energy accumulation current converter (200) and in parallel with described VF source energy accumulation current converter (200) And it is controlled by multiple PQ sources energy accumulation current converter (300) in this VF source energy accumulation current converter (200);
Described VF source energy accumulation current converter (200) is for the current aggregate demand power in AC load (400) During less than its actual peak power output, for accessing AC load (400) power supply of micro-capacitance sensor;
The plurality of PQ source energy accumulation current converter (300) is respectively by described VF source energy accumulation current converter (200) Current aggregate demand power in AC load (400) is actual more than VF source energy accumulation current converter (200) maximum Select during output to open, with micro-capacitance sensor (400) power supply as AC load setting up dilatation;
Each described VF source energy accumulation current converter (200) includes one group of PCS unit (201) in parallel, Each described PQ source energy accumulation current converter (300) all includes one group of the 2nd PCS unit (301) in parallel;
A described PCS unit (201) includes a main PCS unit (201), and this main PCS Unit (201) includes what master controller (2011) and described master controller (2011) were electrically connected First commutator (2012), the first inverter (2013) and the first accumulator (2014);
Each described 2nd PCS unit (301) all includes from controller (3011) and described from control The second commutator (3012), the second inverter (3013) and second that device (3011) is electrically connected store Battery (3014);
Described master controller (2011) exceedes institute for the current aggregate demand power in AC load (400) When stating the actual peak power output in VF source energy accumulation current converter (200), to described at least one from control Device (3011) sends start-up command;
Described master controller (2011) is additionally operable to the peak power output of the micro-capacitance sensor after judging dilatation and exchanges Load (400) current aggregate demand power between power difference meet or exceed at least one described second During the output of PCS unit (301), send shutdown to described at least one from controller (3011) Instruction;
Described it be used for receiving the on/off of described master controller (2011) from controller (3011) and refer to When making, open/close down this 2nd PCS unit (301) from controller place.
Electric power system based on micro-capacitance sensor the most according to claim 7, it is characterised in that described Communication party between VF source energy accumulation current converter (200) and each described PQ source energy accumulation current converter (300) Formula includes RS485, Ethernet, CAN, PLC and ZigBee.
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