CN105262131A - Black-start system and black-start method applicable to light storage micro grid - Google Patents

Black-start system and black-start method applicable to light storage micro grid Download PDF

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CN105262131A
CN105262131A CN201510703476.6A CN201510703476A CN105262131A CN 105262131 A CN105262131 A CN 105262131A CN 201510703476 A CN201510703476 A CN 201510703476A CN 105262131 A CN105262131 A CN 105262131A
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energy storage
controller
micro
load
black
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杨苹
郑群儒
许志荣
曾智基
郑成立
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South China University of Technology SCUT
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South China University of Technology SCUT
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

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Abstract

The invention discloses a black-start system and a black-start method applicable to a light storage micro grid. The system comprises a control layer, a monitoring layer and a communication layer. The control layer is composed of a micro grid central controller MGCC and lower controllers, and the lower controllers include a load controller, a photovoltaic controller and an energy storage controller. The monitoring layer is composed of monitoring devices, namely, a current transformer, a voltage transformer and a power meter. The lower controllers are connected with the monitoring layer. The lower controllers and the micro grid central controller communicate through the communication layer. The communication layer is composed of a communication port and a communication network. The invention provides a light storage micro grid black-start method based on serial recovery which is suitable for controlling black-start of light storage micro grids of different topologies. The black-start method is based on serial recovery, has the advantages of being simple, stable and fast, and can restore the internal voltage and frequency of a micro grid to a stable state and power supply to the load under the off-grid condition.

Description

A kind of black starting-up system and method being applicable to light storage micro-capacitance sensor
Technical field
The present invention relates to electric power network technique field, be specifically related to a kind of black starting-up system and method being applicable to light storage micro-capacitance sensor.
Background technology
In the last few years, along with the fast development of economy, the demand of the energy sharply increases, and distributed power generation (DistributedGeneration, DG) technology is high with its energy utilization rate, pollute the feature such as little to receive and pay close attention to widely, micro-capacitance sensor also receives same concern as its technical support.Distributed power source, load, energy storage device and control system combine by micro-grid system, form a small-sized electric power system.Distributed power source and local load form a whole by micro-capacitance sensor, reduce the grid-connected impact on bulk power grid of distributed power source by control strategy.Micro-capacitance sensor and bulk power grid can support each other, the simultaneously flexibility of micro-capacitance sensor make its can either networking operation again can islet operation, ensure that power supply reliability.
But micro-grid system is unavoidably because some accident enters power-off shut down condition, this will cause important load power-off and cause economic loss, and therefore micro-grid system must have the black start-up ability under island state.The black starting-up of micro-capacitance sensor refers at micro-capacitance sensor because of after fault stops transport and enter island state, there is the energy-storage units of self-startup ability as main power source in first start up system, drive the micro battery without the ability of startup again, progressively expand the recovery scope of system, finally realize the recovery of whole system.Black starting-up is the last line of defense of micro-grid system safe and stable operation.
Find by prior art documents, (a kind of honourable water complementary type micro-capacitance sensor black starting-up control method, China Patent No.: 201410201098.7) propose one and be applicable to honourable water complementary type micro-capacitance sensor black starting-up control method, the method is by gathering micro-capacitance sensor basic data, alternative micro-capacitance sensor black-start scheme is selected according to these parameters, then to alternative simulation calculation one by one, feasible program is generated on this basis.But black starting-up power supply still adopts traditional diesel engine unit, to the light storage micro-capacitance sensor inapplicable not containing diesel engine unit.And above-mentioned patent needs to possess powerful data-handling capacity, also higher to the requirement of central controller, this is inapplicable for small-sized micro-grid system.
This black starting-up system is made up of the controllers such as micro-capacitance sensor central controller, energy storage controller, photovoltaic controller and load governor and monitoring device, communication network.This black-start method utilizes energy storage device as black starting-up main power source, after setting up burning voltage and frequency, progressively drop into load and photovoltaic generating system, be applicable to the user side micro-grid system with photovoltaic generating system and multiple energy storage device, the micro-capacitance sensor for China applies the black starting-up solution providing low-cost high-efficiency.
Summary of the invention
The object of the invention is for user side micro-capacitance sensor, a kind of black starting-up system and method being applicable to light storage micro-capacitance sensor is provided, the present invention proposes and be applicable to user's sidelight storage black starting-up system of micro-capacitance sensor and the black-start method based on build down.
The present invention is achieved through the following technical solutions.
A kind of black starting-up system being applicable to light storage micro-capacitance sensor, comprise key-course, monitor layer and Communication Layer, key-course is made up of micro-capacitance sensor central controller MGCC (MicrogridControlCentersystem) and lower floor's controller, and lower floor's controller comprises load governor, photovoltaic controller and energy storage controller; Monitor layer is made up of monitoring device and current transformer, voltage transformer and power meter; Lower floor's controller is connected with monitor layer, is communicated between lower floor's controller with micro-capacitance sensor central controller by Communication Layer, and Communication Layer is made up of communication port and communication network.
Further, load, the photovoltaic generating system of light storage micro-capacitance sensor are connected with corresponding lower floor's controller with energy storage device monitoring device separately, the electric quantity information of light being stored up the load of micro-capacitance sensor, photovoltaic generating system and energy storage device is first transferred to lower floor's controller, then transmits the real-time electric quantity information of load, photovoltaic generating system and energy storage device to MGCC through Communication Layer by lower floor's controller; MGCC and light store up micro-capacitance sensor also/be connected from net control switch by communication bus, be in the state of being incorporated into the power networks or from Running State to control light storage micro-capacitance sensor.
Further, MGCC is connected by communication bus with load governor, photovoltaic controller and energy storage controller; Load governor, photovoltaic controller and energy storage controller upload the electric information of load, photovoltaic generating system and energy storage device to MGCC by communication bus; MGCC assigns command adapted thereto by communication bus to lower floor's controller, with the running status of control overhead, photovoltaic generating system and energy storage device.
Further, load governor, photovoltaic controller and energy storage controller are connected with on-load switch, photovoltaic generating system switch and energy storage device switch respectively, to control the folding condition of respective switch; Photovoltaic controller is also connected with energy storage device inverter with photovoltaic generating system inverter respectively with energy storage controller, to control the power output of micro battery.
Utilize the light storage micro-capacitance sensor black-start method of described black starting-up system, comprise the steps:
(1) MGCC sends shutoff signal to load governor, photovoltaic controller and energy storage controller, and all switches be connected with load governor, photovoltaic controller and energy storage controller disconnect, and MGCC checks whether light storage micro-capacitance sensor meets black starting-up condition;
(2) one in MGCC optimum selecting multiple stage energy storage device as black starting-up main power source, and start main power source with V/f control model and constant voltage V and permanent frequency f control model, all the other energy storage devices then adopt PQ control model and permanent active power and permanent Reactive Power Control pattern, and the micro battery except main power source keeps holding state;
(3) according to rated capacity order from high to low, MGCC judges whether load meets input condition, if meet, then to energy storage controller transmitted power adjustment instruction, after regulating the exerting oneself of all the other energy storage devices described, send load to load governor and drop into instruction, on-load switch closes, and drops into the load satisfied condition;
(4) according to rated capacity order from high to low, MGCC judges whether photovoltaic generating system meets input condition, if meet, then to the instruction of energy storage controller transmitted power adjustment, after regulating all the other energy storage devices described to exert oneself, send photovoltaic generating system to photovoltaic controller and drop into instruction, the switch connecting photovoltaic generating system closes, and drops into the photovoltaic generating system satisfied condition; MGCC prioritizing selection drops into MPPT (MaximumPowerPointTracking, MPPT maximum power point tracking) class photovoltaic generating system, is secondly PQ class photovoltaic generating system;
(5) MGCC judges whether system meets load or the photovoltaic generating system of input condition in addition, if having, get back to step (3), if nothing, MGCC exits black starting-up control flow, enters and controls from network operation.
Further, step (1) described black starting-up condition comprises following all conditions:
(a) and/disconnect from net control switch;
All loads in (b) excision light storage micro-capacitance sensor and power supply;
C in () light storage micro-capacitance sensor, voltage and frequency are 0;
D () has energy storage device and reserve capacity is sufficient;
E energy storage device that () has black start-up ability can normally work.
Further, step (1) described black starting-up condition comprises following all conditions:
A () possesses energy-storage function;
B () has voltage regulation and frequency modulation ability, to ensure that micro-capacitance sensor is keeping stable from net situation Down Highway voltage and frequency;
C () possesses enough reserve capacitys;
D () possesses sufficient generate output;
For light storage micro-capacitance sensor, optimum selecting possesses the energy storage device that V/f controlling functions, specified charge-discharge electric power are large, energy state satisfies condition and serves as networking main power source.
Further, the described judgement load of step (3) meet input condition according to being:
K Lj·P Lj+P net≤∑P Bat,max
P ljexpression will drop into the power of load j, P netexpression system net power, net power is defined as the difference of the total active power of load and the total active power of photovoltaic generating system, K ljimpact coefficient when load j input, P bat, maxrepresent the peak power output of each energy storage device.
Further, the described judgement photovoltaic generating system of step (4) meet input condition according to being:
P pv,mppt+∑P Bat,min≤∑P L
P pv, mpptrepresent the photovoltaic power generation system output power controlled with MPPT, P bat, minrepresent the minimum output power of all kinds of energy storage device, P lrepresent the gross power having dropped into load.
Further, under black starting-up main power source operates in V/f control mode all the time in the whole process of micro-capacitance sensor black starting-up, for whole micro-capacitance sensor provides stable voltage and frequency; There are other micro battery of black start-up ability adopting PQ control mode with during main power source parallel running, to expand power system capacity; There is no the micro battery of black start-up ability: start with PQ control mode, be connected in parallel to micro-capacitance sensor.
Further optimal enforcement ground, in black-start method of the present invention, in MGCC selection micro-grid system, an energy storage device is with the self-starting of V/f control mode.Set up after burning voltage and frequency until micro-capacitance sensor, MGCC checks that load drops into condition, to energy storage controller transmitted power adjustment signal with after the power output adjusting PQ adjustable energy-storing device, MGCC sends load to load governor and drops into signal, drop into load again, last MGCC checks that photovoltaic generating system drops into condition, signal is sent to adjust the power output of PQ adjustable energy-storing device to energy storage controller, MGCC sends photovoltaic system to corresponding photovoltaic controller and drops into signal, then drops into photovoltaic generating system.After all micro battery and load drop into, the black starting-up flow process of micro-capacitance sensor terminates.Idiographic flow is:
(1) wherein an energy storage device is with the self-starting of V/f control mode for MGCC selection micro-capacitance sensor, and adopt V/f to control to start, other micro-sources are in holding state;
(2) MGCC is according to the ac bus voltage collected and frequency information, judges whether the voltage of micro-grid system and frequency are stablized:
f n min < f < f n m a x U n min < U < U n m a x
Wherein f is the actual frequency of micro-capacitance sensor bus, f nmaxthe higher limit of micro-capacitance sensor assigned frequency, f nminit is the lower limit of micro-capacitance sensor assigned frequency.U is the virtual voltage of micro-capacitance sensor bus, U nmaxthe higher limit of micro-capacitance sensor assigned voltage, U nminit is the lower limit of micro-capacitance sensor assigned voltage.If frequency and voltage is in above scope, be then stable.
(3) MGCC judges that voltage and frequency are as after stable, check the condition that load drops into then:
K Lj·P Lj+P net≤∑P Bat,max
P ljexpression will drop into the power of load j, P netexpression system net power, net power is defined as the difference of the total active power of load and the total active power of photovoltaic generating system, K ljimpact coefficient when load j input, P bat, maxrepresent the peak power output of all kinds of energy storage device.If condition meets, then carry out step (4).
(4) MGCC is to the energy storage controller transmitted power conditioning signal of PQ adjustable energy-storing device side, and after the active power regulating PQ adjustable energy-storing device, MGCC sends load to load governor and drops into signal, and on-load switch closes, and load drops into;
(5) MGCC is according to the electric quantity information collected, and judges the input condition of MPPT class photovoltaic generating system:
P pv,mppt+∑P Bat,min≤∑P L
P pv, mpptrepresent the photovoltaic power generation system output power controlled with MPPT, P bat, minrepresent the minimum output power of all kinds of energy storage device, P lrepresent the gross power having dropped into load.If condition meets, then carry out step (6).
(6) MGCC is to the energy storage controller transmitted power conditioning signal of PQ adjustable energy-storing device side, after PQ adjustable energy-storing device completes power adjustments, MGCC sends photovoltaic system input signal to the photovoltaic controller of MPPT class photovoltaic generating system side, photovoltaic switch closes, and MPPT class photovoltaic generating system drops into;
(7) MGCC is according to the electric quantity information collected, the input condition of inspection PQ class photovoltaic generating system:
P pv,mppt+P pv,pq+∑P Bat,min≤∑P L
Wherein, P pv, pqrepresent the photovoltaic power generation system output power that PQ controls.If condition meets, then carry out step (8).
(8) MGCC is to the energy storage controller transmitted power conditioning signal of PQ adjustable energy-storing device side, after PQ adjustable energy-storing device completes power adjustments, MGCC sends photovoltaic system input signal to the photovoltaic controller of PQ class photovoltaic generating system side, photovoltaic switch closes, and PQ class photovoltaic generating system drops into;
(9) MGCC checks in micro-capacitance sensor whether still have the load and micro battery that do not drop into, if had, returns step (3), if without, enter step (10);
(10) MGCC terminates black starting-up flow process, exits black starting-up control model, enters from network operation control model.
Compared with prior art, tool of the present invention has the following advantages and technique effect: the present invention uses energy storage as black starting-up main power source, different as black starting-up main power source with common use diesel engine generator, energy storage is as black starting-up main power source, response is fast, stable, environmental protection; Black-start method of the present invention fully focuses on the utilization of photovoltaic generating system, enhances the percentage reserve of power supply, improves the stability of system; Whole black starting-up algorithm is succinctly clear, does not need large data processing, and require relatively low to controller, low-cost high-efficiency, is conducive to the popularization of micro-capacitance sensor.
Accompanying drawing explanation
Fig. 1 is the main flow chart of light storage micro-capacitance sensor from net black-start method.
Fig. 2 a is the circuit topology figure of light storage micro-capacitance sensor black starting-up emulation.
Fig. 2 b is that light storage micro-capacitance sensor is from net black starting-up system topological figure.
Fig. 3 is the simulation result oscillogram of light storage micro-capacitance sensor black starting-up under a kind of typical condition.
Embodiment
Below in conjunction with example and accompanying drawing, the present invention is further illustrated.
As Fig. 2 b, a kind of black starting-up system being applicable to light storage micro-capacitance sensor, comprise key-course, monitor layer and Communication Layer, key-course is made up of micro-capacitance sensor central controller MGCC (MicrogridControlCentersystem) and lower floor's controller, and lower floor's controller comprises load governor, photovoltaic controller and energy storage controller; Monitor layer is made up of monitoring device and current transformer, voltage transformer and power meter; Lower floor's controller is connected with monitor layer, is communicated between lower floor's controller with micro-capacitance sensor central controller by Communication Layer, and Communication Layer is made up of communication port and communication network.Load, the photovoltaic generating system of light storage micro-capacitance sensor are connected with corresponding lower floor's controller with energy storage device monitoring device separately, the electric quantity information of light being stored up the load of micro-capacitance sensor, photovoltaic generating system and energy storage device is first transferred to lower floor's controller, then transmits the real-time electric quantity information of load, photovoltaic generating system and energy storage device to MGCC through Communication Layer by lower floor's controller; MGCC and light store up micro-capacitance sensor also/be connected from net control switch by communication bus, be in the state of being incorporated into the power networks or from Running State to control light storage micro-capacitance sensor.MGCC is connected by communication bus with load governor, photovoltaic controller and energy storage controller; Load governor, photovoltaic controller and energy storage controller upload the electric information of load, photovoltaic generating system and energy storage device to MGCC by communication bus; MGCC assigns command adapted thereto by communication bus to lower floor's controller, with the running status of control overhead, photovoltaic generating system and energy storage device.Load governor, photovoltaic controller and energy storage controller are connected with on-load switch, photovoltaic generating system switch and energy storage device switch respectively, to control the folding condition of respective switch; Photovoltaic controller is also connected with energy storage device inverter with photovoltaic generating system inverter respectively with energy storage controller, to control the power output of micro battery.
The main flow of light storage micro-capacitance sensor black-start method as shown in Figure 1, shown in idiographic flow is analyzed as follows:
1. MGCC checks whether micro-capacitance sensor meets black starting-up condition.Concrete basis for estimation is:
A) and/be in off-state from net control switch;
B) control switch of all loads and micro battery side is in off-state;
C) voltage on micro-capacitance sensor ac bus and frequency are 0;
The energy storage device d) with black start-up ability can normally work;
E) micro-capacitance sensor has energy-storage units and reserve capacity is sufficient.
2. an energy storage device in MGCC optimum selecting micro-capacitance sensor is as black starting-up main power source.When meeting following concrete selection gist, select the large energy storage device of SOC (StateofCharge, state-of-charge) large, specified charge-discharge electric power as main power source:
A) there is voltage regulation and frequency modulation ability, to ensure that micro-capacitance sensor is keeping stable from net situation Down Highway voltage and frequency;
B) enough reserve capacitys are possessed;
C) sufficient generate output is possessed.
3. MGCC is to energy storage controller and photovoltaic controller sending mode control signal.Energy storage controller to main power source side sends V/f control signal, and the controller to other micro battery sides sends PQ control signal.Then, MGCC sends startup to the energy storage controller of main power source side and drops into signal, controls to send standby signal to other micro battery.
4. MGCC is according to the electric quantity information collected, and judges the stable condition of voltage and frequency:
f n min < f < f n m a x U n min < U < U n m a x
Wherein f is the actual frequency of micro-capacitance sensor bus, f nmaxthe higher limit of micro-capacitance sensor assigned frequency, f nminit is the lower limit of micro-capacitance sensor assigned frequency.U is the virtual voltage of micro-capacitance sensor bus, U nmaxthe higher limit of micro-capacitance sensor assigned voltage, U nminit is the lower limit of micro-capacitance sensor assigned voltage.If frequency and voltage is in above scope, be then stable.
5. MGCC judges that following load drops into condition, as met, then to the energy storage controller transmitted power conditioning signal of PQ adjustable energy-storing device side, after PQ adjustable energy-storing device completes the adjustment of active power, MGCC sends load to corresponding load governor and drops into signal, after on-load switch is closed, load completes input.
K Lj·P Lj+P net≤∑ P Bat,max
P ljexpression will drop into the power of load j, P netthe net power of expression system, net power is defined as the difference of the total active power of load and the total active power of photovoltaic generating system, K ljimpact coefficient when load j input, P bat, maxrepresent the peak power output of all kinds of energy storage device;
6. MGCC checks the input condition of following MPPT class photovoltaic generating system, as met, MGCC is to the energy storage controller transmitted power conditioning signal of PQ adjustable energy-storing device side, after PQ adjustable energy-storing device completes the adjustment of active power, MGCC sends photovoltaic system input signal to the photovoltaic controller of MPPT class photovoltaic system side, after photovoltaic switch is closed, MPPT class photovoltaic generating system completes input.
P pv,mppt+∑P Bat,min≤∑P L
P pv, mpptrepresent with MPPT class photovoltaic power generation system output power, P bat, minrepresent the minimum output power of all kinds of energy storage device;
7. MGCC checks the input condition of following PQ class photovoltaic generating system, as met, MGCC is to the energy storage controller transmitted power conditioning signal of PQ adjustable energy-storing device side, after PQ adjustable energy-storing device completes the adjustment of active power, MGCC sends photovoltaic system input signal to the photovoltaic controller of PQ class photovoltaic system side, after photovoltaic switch is closed, PQ class photovoltaic generating system completes input.
P pv,mppt+P pv,pq+∑P Bat,min≤∑P L
Wherein, P pv, pqrepresent PQ class photovoltaic power generation system output power;
8. MGCC checks the load and micro battery that whether do not drop in addition, if had, returns step 5., if nothing, then enters step 9.
9. MGCC terminates black starting-up control flow, exits black starting-up control model, enters from network operation control model.
In order to verify light storage micro-capacitance sensor black-start method proposed by the invention, being provided with a kind of typical condition herein and carrying out simulating, verifying.As shown in Figure 2 a, test macro is single layer structure to the circuit topology figure of light storage micro-capacitance sensor black starting-up emulation, and system is made up of photovoltaic generating system, energy storage device and load.Wherein, photovoltaic generating system is made up of the PQ type 2 of rated capacity to be the MPPT Class1 platform of 30kW and rated capacity be 30kW, energy storage device is made up of the main power source of 1 90kW and the accessory power supply of 1 30kW, and load is 3 rated capacities is the static load of 50kW.
As follows is the initial condition of typical condition:
Illumination: 1000W/m 2
Temperature: 25 DEG C;
Photovoltaic generating system 1: type: PQ class, capacity: 30kW;
Photovoltaic generating system 2: type: PQ class, capacity: 30kW;
Photovoltaic generating system 3: type: MPPT class, capacity: 30kW;
Energy storage device 1: capacity: 90kW, SOC:65%;
Energy storage device 2: capacity: 30kW, SOC:60%;
Load 1: capacity 50kW static load;
Load 2: capacity 50kW static load;
Load 3: capacity 50kW static load;
As shown in Figure 3, wherein (a) is the power output waveform of photovoltaic generating system to black starting-up simulation waveform;
B () is the power output waveform of energy storage device; C () is the power waveform of load; D () is micro-capacitance sensor busbar voltage waveform; E () is micro-capacitance sensor bus frequency waveform.
After MGCC detects that micro-capacitance sensor meets black starting-up condition, energy state and the more excellent energy storage device 1 of capacity is selected to serve as system black starting-up main power source, and send V/f control signal to energy storage controller 1 and drop into signal, make energy storage device 1 adopt V/f control model start and drop into micro-capacitance sensor.MGCC sends PQ control signal and standby signal to energy storage controller, makes energy storage device 2 adopt PQ control model to start, and is in holding state.
When 1.2s, main power source energy storage device 1 establishes stable system voltage and frequency, now MGCC detects that load 1 meets load and drops into condition, MGCC is to energy storage controller 2 transmitted power conditioning signal, after regulating the exerting oneself of energy storage device 2, MGCC sends load to load governor 1 and drops into signal, and on-load switch 1 closes, and load 1 drops into.
When 3.4s, MGCC detects that load 2 meets load and drops into condition, and MGCC is to energy storage controller 2 transmitted power conditioning signal, and after regulating the exerting oneself of energy storage device 2, MGCC sends load to load governor 2 and drops into signal, and on-load switch 2 closes, and load 2 drops into.
After input load 1 and load 2, load 3 no longer meets load and drops into condition.MGCC judges whether photovoltaic generating system meets input condition then.When 4.3s, MGCC determines the input condition that photovoltaic generating system 3 meets MPPT class photovoltaic generating system, MGCC is to energy storage controller 2 transmitted power conditioning signal, after regulating the exerting oneself of energy storage device 2, MGCC sends photovoltaic system to photovoltaic controller 3 and drops into signal, photovoltaic switch 3 closes, and photovoltaic generating system 3 drops into.
When 5.0s, MGCC detects that photovoltaic generating system 1 meets the input condition of PQ class photovoltaic generating system, MGCC is to energy storage controller 2 transmitted power conditioning signal, after regulating the exerting oneself of energy storage device 2, MGCC sends photovoltaic to photovoltaic controller 1 and drops into signal, photovoltaic switch 1 closes, and drop into photovoltaic generating system 1, the input of photovoltaic generating system increases power system capacity.
When 7.9s, MGCC judges that load 3 meets load and drops into condition, and MGCC is to energy storage controller 2 transmitted power conditioning signal, and after regulating the exerting oneself of energy storage device 2, MGCC sends load to load governor 3 and drops into signal, and on-load switch 3 closes, and load 3 drops into.
When 8.5s, MGCC judges that photovoltaic generating system 2 meets PQ class photovoltaic generating system and drops into condition, MGCC is to energy storage controller 2 transmitted power conditioning signal, after regulating the exerting oneself of energy storage device 2, MGCC sends photovoltaic system to photovoltaic controller 2 and drops into signal, photovoltaic switch 2 closes, and photovoltaic generating system 2 drops into.
The oscillogram of Fig. 3 describes the process of micro-capacitance sensor black starting-up in detail, and in (a), curve pvMppt is the operating state of MPPT class photovoltaic system, and curve pvPQ1, curve pvPQ2 are the operating state of 2 PQ class photovoltaic systems; B curve pBAT1 is the operating state of energy-storage system as main power source and energy storage device 1 in (), curve pBAT2 is the operating state of energy storage device 2; C () middle curve pLD1, curve pLD2, curve pLD3 are respectively the operating state of load 1, load 2, load 3; D in (), curve Vnet is the busbar voltage state of micro-grid system; E in (), curve fnet is the state of micro-grid system bus frequency.
So far, all load restorations are powered, and all micro battery successfully drop into, and system voltage and frequency meet service requirement, the success of micro-capacitance sensor black starting-up.MGCC exits black starting-up control model, enters from network operation control model.

Claims (10)

1. one kind is applicable to the black starting-up system of light storage micro-capacitance sensor, it is characterized in that, comprise key-course, monitor layer and Communication Layer, key-course is made up of micro-capacitance sensor central controller MGCC and lower floor's controller, and lower floor's controller comprises load governor, photovoltaic controller and energy storage controller; Monitor layer is made up of monitoring device and current transformer, voltage transformer and power meter; Lower floor's controller is connected with monitor layer, is communicated between lower floor's controller with micro-capacitance sensor central controller by Communication Layer, and Communication Layer is made up of communication port and communication network.
2. black starting-up system according to claim 1, is characterized in that:
Load, the photovoltaic generating system of light storage micro-capacitance sensor are connected with corresponding lower floor's controller with energy storage device monitoring device separately, the electric quantity information of light being stored up the load of micro-capacitance sensor, photovoltaic generating system and energy storage device is first transferred to lower floor's controller, then transmits the real-time electric quantity information of load, photovoltaic generating system and energy storage device to MGCC through Communication Layer by lower floor's controller; MGCC and light store up micro-capacitance sensor also/be connected from net control switch by communication bus, be in the state of being incorporated into the power networks or from Running State to control light storage micro-capacitance sensor.
3. black starting-up system according to claim 1, is characterized in that: MGCC is connected by communication bus with load governor, photovoltaic controller and energy storage controller; Load governor, photovoltaic controller and energy storage controller upload the electric information of load, photovoltaic generating system and energy storage device to MGCC by communication bus; MGCC assigns command adapted thereto by communication bus to lower floor's controller, with the running status of control overhead, photovoltaic generating system and energy storage device.
4. black starting-up system according to claim 1, is characterized in that: load governor, photovoltaic controller and energy storage controller are connected with on-load switch, photovoltaic generating system switch and energy storage device switch respectively, to control the folding condition of respective switch; Photovoltaic controller is also connected with energy storage device inverter with photovoltaic generating system inverter respectively with energy storage controller, to control the power output of micro battery.
5. utilize the light storage micro-capacitance sensor black-start method of black starting-up system described in claim 1, it is characterized in that, comprise the steps:
(1) MGCC sends shutoff signal to load governor, photovoltaic controller and energy storage controller, and all switches be connected with load governor, photovoltaic controller and energy storage controller disconnect, and MGCC checks whether light storage micro-capacitance sensor meets black starting-up condition;
(2) one in MGCC optimum selecting multiple stage energy storage device as black starting-up main power source, and start main power source with V/f control model and constant voltage V and permanent frequency f control model, all the other energy storage devices then adopt PQ control model and permanent active power and permanent Reactive Power Control pattern, and the micro battery except main power source keeps holding state;
(3) according to rated capacity order from high to low, MGCC judges whether load meets input condition, if meet, then to energy storage controller transmitted power adjustment instruction, after regulating the exerting oneself of all the other energy storage devices described, send load to load governor and drop into instruction, on-load switch closes, and drops into the load satisfied condition;
(4) according to rated capacity order from high to low, MGCC judges whether photovoltaic generating system meets input condition, if meet, then to the instruction of energy storage controller transmitted power adjustment, after regulating all the other energy storage devices described to exert oneself, send photovoltaic generating system to photovoltaic controller and drop into instruction, the switch connecting photovoltaic generating system closes, and drops into the photovoltaic generating system satisfied condition; MGCC prioritizing selection drops into MPPT (MaximumPowerPointTracking, MPPT maximum power point tracking) class photovoltaic generating system, is secondly PQ class photovoltaic generating system;
(5) MGCC judges whether system meets load or the photovoltaic generating system of input condition in addition, if having, get back to step (3), if nothing, MGCC exits black starting-up control flow, enters and controls from network operation.
6. black-start method according to claim 5, is characterized in that, step (1) described black starting-up condition comprises following all conditions:
(a) and/disconnect from net control switch;
All loads in (b) excision light storage micro-capacitance sensor and power supply;
C in () light storage micro-capacitance sensor, voltage and frequency are 0;
D () has energy storage device and reserve capacity is sufficient;
E energy storage device that () has black start-up ability can normally work.
7. black-start method according to claim 5, is characterized in that, step (1) described black starting-up condition comprises following all conditions:
A () possesses energy-storage function;
B () has voltage regulation and frequency modulation ability, to ensure that micro-capacitance sensor is keeping stable from net situation Down Highway voltage and frequency;
C () possesses enough reserve capacitys;
D () possesses sufficient generate output;
For light storage micro-capacitance sensor, optimum selecting possesses the energy storage device that V/f controlling functions, specified charge-discharge electric power are large, energy state satisfies condition and serves as networking main power source.
8. black-start method according to claim 5, is characterized in that, the foundation that the described judgement load of step (3) meets input condition is:
K Lj·P Lj+P net≤∑P Bat,max
P ljexpression will drop into the power of load j, P netexpression system net power, net power is defined as the difference of the total active power of load and the total active power of photovoltaic generating system, K ljimpact coefficient when load j input, P bat, maxrepresent the peak power output of each energy storage device.
9. black-start method according to claim 5, is characterized in that, the foundation that the described judgement photovoltaic generating system of step (4) meets input condition is:
P pv,mppt+∑P Bat,min≤∑P L
P pv, mpptrepresent the photovoltaic power generation system output power controlled with MPPT, P bat, minrepresent the minimum output power of all kinds of energy storage device, P lrepresent the gross power having dropped into load.
10. black-start method according to claim 5, is characterized in that, under black starting-up main power source operates in V/f control mode all the time in the whole process of micro-capacitance sensor black starting-up, for whole micro-capacitance sensor provides stable voltage and frequency; There are other micro battery of black start-up ability adopting PQ control mode with during main power source parallel running, to expand power system capacity; There is no the micro battery of black start-up ability: start with PQ control mode, be connected in parallel to micro-capacitance sensor.
CN201510703476.6A 2015-10-22 2015-10-22 Black-start system and black-start method applicable to light storage micro grid Pending CN105262131A (en)

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CN106451562A (en) * 2016-12-16 2017-02-22 北京索英电气技术有限公司 Black-start system and method for wind and light power storage station
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CN106992537A (en) * 2017-03-29 2017-07-28 中国电力科学研究院 A kind of power grid"black-start" method and device
CN109217348A (en) * 2017-06-29 2019-01-15 周锡卫 A kind of the black starting-up device and control method of scene power supply micro-capacitance sensor
CN109217348B (en) * 2017-06-29 2024-03-08 周锡卫 Control method of black start device of wind-light power supply micro-grid
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CN110112766A (en) * 2019-02-25 2019-08-09 东华大学 A kind of factory's micro-capacitance sensor black starting-up system and method
CN110350576A (en) * 2019-06-24 2019-10-18 鹤山市绿湖生物能源有限公司 A kind of mixed power generation declines black-start method, device and the equipment of power grid
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