CN105680481A - Control strategy of distributed photovoltaic energy-storage micro grid - Google Patents

Control strategy of distributed photovoltaic energy-storage micro grid Download PDF

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Publication number
CN105680481A
CN105680481A CN201610216576.0A CN201610216576A CN105680481A CN 105680481 A CN105680481 A CN 105680481A CN 201610216576 A CN201610216576 A CN 201610216576A CN 105680481 A CN105680481 A CN 105680481A
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energy storage
storage system
battery energy
whether detection
photovoltaic generating
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CN105680481B (en
Inventor
孙威
肖海伟
李颖
郭均柳
姚自良
何志超
刘明爽
王大臣
李伟军
王明旺
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Shenzhen Xinwangda Energy Technology Co ltd
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Sunwoda Electronic Co Ltd
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    • H02J3/383—
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/388—Islanding, i.e. disconnection of local power supply from the network
    • 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
    • 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
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/10—Flexible AC transmission systems [FACTS]
    • 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
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention relates to a controls strategy of a distributed photovoltaic energy-storage micro grid. The control strategy comprises that in the grid-connected state, the micro grid runs in a network manner, a battery energy-storage system works in a power constant control mode, when an active switching instruction is received, the power of the battery energy-storage system is adjusted, the micro grid is disengaged from the power grid and runs independently, and a micro-grid system executes an off-grid operation control strategy; meanwhile, the battery energy-storage system works in a voltage/frequency-constant control mode; and when a grid-connected instruction is received, the micro grid and the power grid run in the networked manner, the battery energy-storage system works in a PQ mode, and the micro-grid system executes a grid-connected operation control strategy. Self intermittence and fluctuation of distributed photovoltaic power generation can be alleviated, and the access capability and the grid-connected electric energy quality of distributed photovoltaic power generation are improved.

Description

Distributed photovoltaic energy storage micro-capacitance sensor control strategy
Technical field:
The present invention relates to a kind of light volt energy storage micro-capacitance sensor, relate to a kind of distributed photovoltaic energy storage micro-capacitance sensor control strategy further.
Background technology:
Although distributed generation system has bigger advantage in energy-saving and environmental protection, power ampere congruence, but due to distributed power source control difficulty, unit cost of access height, large-scale distributed plant-grid connection electrical network will affect the stability of power system, usually, bulk power grid take limit, isolation mode to dispatch distributed power source: when power system generation fault, in order to reduce the impact to bulk power grid, distributed power source must be out of service immediately, and this makes the advantage of distributed power source could not obtain fully playing.
Along with the development of distributed power source and micro-net, the ratio of light volt system shared by micro-net is also more come also high. But independent photovoltaic generating system exists the shortcoming such as randomness and fluctuation, when rate of permeation is bigger in micro-net system for it, the safe and stable operation of micro-net will be affected. The problems such as the power balance in micro-net system, stability and the quality of power supply are stored up in order to solve light, the accumulator system that output rating is more stable must be equipped with, and according to predetermined control strategy, it is achieved the instantaneous balance of micro-net internal system energy, it is achieved light stores up the steady running of micro-net.
Guang Chuwei Netcom is often connected on user side, both can with bulk power grid networking operation, independent operating can be disconnected with bulk power grid again, there is higher handiness and schedulable. For the control strategy of micro-network operation mode smooth switching, to grind Gui also imperfect, more existing control strategies still Shortcomings part. On traditional control strategy basis, micro-grid system is on the basis realizing the micro-grid connection/mode smooth that is incorporated into the power networks switching, minimum as optimization aim taking micro-network operation cost, the exchange power between major network is optimized when being incorporated into the power networks, meet the economy of micro-network operation, with realize micro-network operation mode smooth switching and performance driving economy grind Gui be micro-net research urgent needs, be also the prerequisite that micro-net can be applied.
Summary of the invention:
It is an object of the invention to provide a kind of distributed photovoltaic energy storage micro-capacitance sensor control strategy, distributed photovoltaic energy storage micro-grid connection control strategy, distributed photovoltaic energy storage micro-capacitance sensor from net control strategy.Technical scheme is as follows:
Distributed photovoltaic energy storage micro-capacitance sensor control strategy, described micro-capacitance sensor comprises: photovoltaic generating system, battery energy storage system, load, micro-capacitance sensor comprehensive monitoring system; Control strategy is as follows:
At also net state, micro-capacitance sensor networking operation, battery energy storage system is operated in invariable power (PQ) master mode, works as t1Battery energy storage system, when receiving active switching command, is carried out power adjustment by the time, and vacuum and permanent magnet quick make-and-break switch disconnects, and micro-capacitance sensor and electrical network depart from independent operating, and micro-net system performs from network operation control strategy; Now, battery energy storage system is operated in constant voltage/constant frequency control (V/f) pattern; Work as t5When reception is to grid-connected instruction, vacuum and permanent magnet quick make-and-break switch closes, and micro-capacitance sensor and grid network run, and battery energy storage system is operated in PQ pattern, and micro-net system performs to be incorporated into the power networks control strategy.
The described control strategy that is incorporated into the power networks is:
Steps A: judge whether system possesses operational conditions; If possessed, go to step B, otherwise, terminate;
Step B: data gathering, calculating, data parameters comprises:
SOC: the state-of-charge of battery energy storage system work; Ub、Ib: battery energy storage system charging/discharging voltage, electric current;
SOCMin: the minimum SOC of battery energy storage system work; SOCMax: the maximum SOC of battery energy storage system work;
UB, Max: the stopping potential of battery energy storage system charge and discharge; IB, Min: the cut-off current of battery energy storage system charge and discharge;
tc_b、tdisc_b: the battery energy storage system continuous charge and discharge time;
tB, c_Max、tB, disc_Max: the maximum continuous charge and discharge time allowing the continuous charge and discharge of battery energy storage system;
PPV: the photovoltaic power generation system output power value in k moment;
PPV, Min: the minimum output power value that photovoltaic generating system can run;
Pb: the battery energy storage system output power value in k moment;
PL: the load power requirements in k moment;
ΔPPV_L: the P in k momentPV-PLAllow peak power difference;
ΔPG: the k moment needs the performance number that electrical network provides;
ΔPb: the k moment needs the performance number that battery energy storage system provides;
Step C: the state-of-charge (SOC state) of detection battery energy storage system; If SOC is >=SOCMax, go to step D, if SOCMin< SOC < SOCMax, go to step E, if SOC is < SOCMin, go to step F;
Step D:
Step D01: whether detection meets PPV> PPV, MinIf meeting, going to step D02, otherwise, go to step D101-D106;
Step D02: whether detection meets PPV+Pb> PLIf meeting, going to step D03, otherwise, go to step D401-D404;
Step D03: whether detection meets PPV> PLIf meeting, going to step D301-D305, otherwise, go to step D201-D204;
Step D101: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step D103, otherwise, go to step D102;
Step D102: according to mode 3 controlling run, Δ PG=PL, photovoltaic generating system is not powered, battery energy storage system hot reserve, from electrical network power purchase; Return steps A;
Step D103: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step D102, otherwise, go to step D104;
Step D104: whether detection meets Pb≥PLIf meeting, going to step D105, otherwise, go to step D106;
Step D105: according to pattern 1 controlling run, Δ Pb=PL, photovoltaic generating system is not powered, and battery energy storage system discharges, and grid-connected does not surf the Net; Return steps A;
Step D106: according to pattern 2 controlling run, that is: Δ PG=PL-Pb, photovoltaic generating system is powered, and battery energy storage system discharges, from electrical network power purchase; Return steps A;
Step D201: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step D203, otherwise, go to step D202;
Step D202: according to pattern 5 controlling run, that is: Δ PG=PL-PPV, photovoltaic generating system is powered, battery energy storage system hot reserve, from electrical network power purchase; Return steps A;
Step D203: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step D202, otherwise, go to step D204;
Step D204: according to pattern 4 controlling run, that is: Δ Pb=PL-PPV, photovoltaic generating system is powered, and battery energy storage system discharges, and grid-connected does not surf the Net; Return steps A;
Step D301: whether detection meets PPV-PL>ΔPPV_LIf meeting, going to step D303, otherwise, go to step D302;
Step D302: according to pattern 6 controlling run, that is: photovoltaic generating system is powered, battery energy storage system hot reserve, grid-connected does not surf the Net; Return steps A;
Step D303: whether detection light photovoltaic generating system meets grid-connected condition, if met, goes to step D304, otherwise, go to step D305;
Step D304: according to pattern 8 controlling run, that is: Δ PG=PPV-PL, photovoltaic generating system is powered, battery energy storage system hot reserve, electrical network feed; Return steps A;
Step D305: according to mode 7 controlling run, that is: photovoltaic generating system part abandons light, battery energy storage system hot reserve, grid-connected does not surf the Net; Return steps A;
Step D401: whether detection meets battery energy storage system electric discharge starting conditions, goes to step D403 if met, otherwise, go to step D402;
Step D402: according to pattern 10 controlling run, that is: Δ PG=PL-PPV, photovoltaic generating system is powered, battery energy storage system hot reserve, from electrical network power purchase; Return steps A;
Step D403: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step 402, otherwise, go to step D404;
Step D404: according to pattern 9 controlling run, that is: Δ PG=PL-(Pb+PPV), photovoltaic generating system is powered, and battery energy storage system discharges, from electrical network power purchase; Return steps A;
Step e:
Step e 01: whether detection meets PPV> PPV, MinIf meeting, going to step E02, otherwise, go to step E401-E406;
Step e 02: whether detection meets PPV+Pb> PLIf met, go to step E03, otherwise, go to step E301-E304;
Step e 03: whether detection meets PPV> PLIf meeting, going to step E101-E108, otherwise, go to step E201-E204;
Step e 101: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step E102, otherwise, go to step E104;
Step e 102: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step E104, otherwise, go to step E103;
Step e 103: according to pattern 10 controlling run, that is: Δ Pb=PL-PPV, photovoltaic generating system is powered, and battery energy storage system charges, and grid-connected does not surf the Net; Return steps A;
Step e 104: whether detection meets PPV-PL>ΔPPV_LIf meeting, going to step E106, otherwise, go to step E105;
Step e 105: according to pattern 6 controlling run, that is: photovoltaic generating system is powered, battery energy storage system hot reserve, grid-connected does not surf the Net; Return steps A;
Step e 106: whether detection light photovoltaic generating system meets grid-connected condition, as met, goes to step E108, otherwise, go to step E107;
Step e 107: according to mode 7 controlling run, that is: photovoltaic generating system part abandons light, battery energy storage system hot reserve, grid-connected does not surf the Net; Return steps A;
Step e 108: according to pattern 8 controlling run, that is: photovoltaic generating system is powered, battery energy storage system hot reserve, to electrical network feed; Return steps A;
Step e 201: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step E203, otherwise, go to step E202;
Step e 202: according to pattern 10 controlling run, that is: Δ PG=PL-PPV, photovoltaic generating system is powered, battery energy storage system hot reserve, from electrical network power purchase; Return steps A;
Step e 203: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step E202, otherwise, go to step E204;
Step e 204: according to pattern 4 controlling run, that is: Δ Pb=PL-PPV, photovoltaic generating system is powered, and battery energy storage system discharges, and grid-connected does not surf the Net; Return steps A;
Step e 301: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step E303, otherwise, go to step E302;
Step e 302: according to pattern 10 controlling run, that is: Δ PG=PL-PPV, photovoltaic generating system is powered, battery energy storage system hot reserve, from electrical network power purchase; Return steps A;
Step e 303: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step E302, otherwise, go to step E304;
Step e 304: according to pattern 9 controlling run, that is: Δ PG=PL(PPV+Pb), photovoltaic generating system is powered, and battery energy storage system discharges, from electrical network power purchase; Return steps A;
Step e 401: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step E403, otherwise, go to step E402;
Step e 402: according to mode 3 controlling run, that is: Δ PG=PL, photovoltaic generating system is not powered, battery energy storage system hot reserve, from electrical network power purchase; Return steps A;
Step e 403: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step E402, otherwise, go to step E404;
Step e 404: whether detection meets Pb≥PLIf meeting, going to step E405, otherwise, go to step E406;
Step e 405: according to pattern 1 controlling run, that is: Δ Pb=PL, photovoltaic generating system is not powered, and battery energy storage system discharges, and grid-connected does not surf the Net; Return steps A;
Step e 406: according to pattern 2 controlling run, that is: Δ PG=PL-Pb, photovoltaic generating system is powered, and battery energy storage system discharges, from electrical network power purchase; Return steps A;
Step F:
Step F 01: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step F03, otherwise, go to step F02;
Step F 02: according to pattern 11 controlling run, that is: Δ PG+PPV=PL, photovoltaic generating system is powered, and battery cold standby use, from electrical network power purchase; Return steps A;
Step F 03: whether detection meets PPV> PPV, MinIf meeting, going to step F04, otherwise, go to step F05;
Step F 04: according to pattern 12 controlling run, that is: Δ PG+PPV=PL+Pb, photovoltaic generating system is powered, and battery energy storage system charges, from electrical network power purchase; Return steps A;
Step F 05: according to pattern 11 controlling run, that is: Δ PG=PL+Pb, photovoltaic generating system is powered, and battery cold standby use, from electrical network power purchase;Return steps A.
Described from network operation control strategy it is:
Step G: judge whether system possesses operational conditions; If possessed, go to step H, otherwise, terminate;
Step H: data gathering, calculating, data parameters comprises:
SOC: the state-of-charge of battery energy storage system work; Ub、Ib: battery energy storage system charging/discharging voltage, electric current;
SOCMin: the minimum SOC of battery energy storage system work; SOCMax: the maximum SOC of battery energy storage system work;
UB, Max: the stopping potential of battery energy storage system charge and discharge; IB, Min: the cut-off current of battery energy storage system charge and discharge;
tc_b、tdisc_b: the battery energy storage system continuous charge and discharge time;
tB, c_Max、tB, disc_Max: the maximum continuous charge and discharge time allowing the continuous charge and discharge of battery energy storage system;
PPV: the photovoltaic power generation system output power value in k moment;
PPV, Min: the minimum output power value that photovoltaic generating system can run;
Pb: the battery energy storage system output power value in k moment;
PL: the load power requirements in k moment;
ΔPPV_L: the P in k momentPV-PLAllow peak power difference;
ΔPG: the k moment needs the performance number that electrical network provides;
ΔPb: the k moment needs the performance number that battery energy storage system provides;
PL': the specific load power demand value in k moment;
Step I: the state-of-charge (SOC state) of detection battery energy storage system; If SOC is >=SOCMax, go to step J, if SOCMin< SOC < SOCMax, go to step K, if SOC is < SOCMin, go to step L;
Step J:
Step J01: whether detection meets PPV> PPV, MinIf meeting, going to step J101-J107, otherwise, go to step J02;
Step J02: whether detection meets PPV+Pb> PLIf meeting, going to step J03, otherwise, go to step J401-J406;
Step J03: whether detection meets PPV> PLIf meeting, going to step J301-J306, otherwise, go to step J201-J202;
Step J101: whether detection meets battery energy storage system electric discharge starting conditions, goes to step J103 if met, otherwise, go to step J102;
Step J102: send load and do not meet alarm; Return step G;
Step J103: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step J102, otherwise, go to step J104;
Step J104: whether detection meets Pb≥PLIf meeting, going to step J105, otherwise, go to step J107;
Step J105: whether detection battery energy storage system electric discharge can meet the demand of specific load, if can meet, goes to step J106, otherwise, go to step J102;
Step J106: according to pattern 22 controlling run, that is: Δ Pb=PL', photovoltaic generating system is not powered, and battery energy storage system discharges, and electrical network is from net; Return step G;
Step J107: according to pattern 21 controlling run, that is: Δ Pb=PL, photovoltaic generating system is not powered, and battery energy storage system discharges, and electrical network is from net; Return step G;
Step J201: whether detection meets battery energy storage system electric discharge starting conditions, goes to step J202 if met, otherwise, go to step J203;
Step J202: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step J203, otherwise, go to step J204;
Step J203: whether detection can meet the demand of specific load, if can meet, goes to step J205, otherwise, go to step J206;
Step J204: according to pattern 23 controlling run, Δ Pb=PL-PPV, photovoltaic generating system is powered, and battery energy storage system discharges, and electrical network is from net;Return step G;
Step J205: according to pattern 24 controlling run, photovoltaic generating system is powered and is met the demand of specific load, battery energy storage system hot reserve, and electrical network is from net;
Step J206: send load and do not meet alarm; Return step G;
Step J301: whether detection meets PPV-PL> Δ PPV_LIf meeting, going to step J303, otherwise, go to step J302;
Step J302: according to pattern 24 controlling run, photovoltaic generating system is powered, battery energy storage system hot reserve, and electrical network is from net;
Step J303: according to pattern 25 controlling run, Δ Pb=PL', photovoltaic generating system part abandons light, battery energy storage system hot reserve, and electrical network is from net; Return step G;
Step J401: detection PPV+PbWhether meeting the demand of specific load, if met, going to step J403, otherwise, go to step J402;
Step J402: send load and do not meet alarm; Return step G;
Step J403: whether detection meets battery energy storage system electric discharge starting conditions, goes to step J404 if met, otherwise, go to step J405;
Step J404: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step J405, otherwise, go to step J406;
Step J405: whether detection light photovoltaic generating system is powered separately can meet the demand of specific load, if can meet, goes to step J407, otherwise, go to step J402;
Step J406: according to pattern 23 controlling run, Δ Pb=PL′-PPV, photovoltaic generating system is powered, and battery energy storage system discharges, and the two meets the demand of specific load jointly, and electrical network is from net; Return step G;
Step K:
Step K 01: whether detection meets PPV> PPV, MinIf meeting, going to step K02, otherwise, go to step K401-K407;
Step K 02: whether detection meets PPV+Pb> PLIf meeting, going to step K03, otherwise, go to step K301-K307;
Step K 03: whether detection meets PPV> PLIf meeting, going to step K101-K106, otherwise, go to step K201-K206;
Step K 101: whether detection meets battery energy storage system charging starting conditions, if met, goes to step K102, otherwise, go to step K103;
Step K 102: Δ PL_PV=PPV-PL, whether detection meets battery energy storage system charging cut-off condition, if met, goes to step K103, otherwise, go to step K106;
Step K 103: whether detection meets PPV-PL> Δ PPV_LIf meeting, going to step K105, otherwise, go to step K104;
Step K 104: according to pattern 24 controlling run, that is: photovoltaic generating system is powered, battery energy storage system hot reserve, and electrical network is from net; Return step G;
Step K 105: according to pattern 25 controlling run, that is: photovoltaic generating system part abandons light, battery energy storage system hot reserve, and electrical network is from net; Return step G;
Step K 106: according to pattern 26 controlling run, Δ Pb=PL-PPV, photovoltaic generating system is powered, and battery energy storage system charges, and electrical network is from net; Return step G;
Step K 201: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step K202, otherwise, go to step K203;
Step K 202: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step K203, otherwise, go to step K204;
Step K 203: whether detection light photovoltaic generating system is powered meets the demand of specific load, if met, goes to step K205, otherwise, go to step K206;
Step K 204: according to pattern 21 controlling run, photovoltaic generating system is powered, battery energy storage system discharges, and electrical network is from net; Return step G;
Step K 205: according to pattern 27 controlling run, adjustment photovoltaic generating system so that it is output rating meets the demand of specific load, and electrical network is from net; Return step G;
Step K 206: send load and do not meet alarm; Return step G;
Step K 301: whether detection light photovoltaic generating system is powered and battery energy storage system discharges can meet the demand of specific load, if met, goes to step K302, otherwise, go to step K307;
Step K 302: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step K303, otherwise, go to step K304;
Step K 303: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step K305, otherwise, go to step K304;
Step K 304: whether detection light photovoltaic generating system is powered can meet the demand of specific load, if met, goes to step K306, otherwise, go to step K307;
Step K 305: according to pattern 23 controlling run, that is: Δ Pb=PL′-PPV, photovoltaic generating system is powered, and battery energy storage system discharges, and the two meets the demand of specific load jointly, and electrical network is from net; Return step G;
Step K 306: according to pattern 28 controlling run, PPV=PL', adjustment photovoltaic generating system so that it is output rating meets the demand of specific load, the outer portion power of the demand of specific load is battery energy storage system charging, and electrical network is from net; Return step G;
Step K 307: send load and do not meet alarm; Return step G;
Step K 401: whether detection meets battery energy storage system electric discharge starting conditions, goes to step K402 if met, otherwise, go to step K407;
Step K 402: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step K407, otherwise, go to step K403;
Step K 403: whether detection meets Pb≥PL, as met, go to step K405, otherwise, go to step K404;
Step K 404: whether battery energy storage system is powered separately can meet the demand of specific load, if can meet, goes to step K406, otherwise, go to step K407;
Step K 405: according to pattern 21 controlling run, Δ Pb=PL, photovoltaic generating system is not powered, and battery energy storage system discharges, and electrical network is from net; Return step G;
Step K 406: according to pattern 21 controlling run, Δ Pb=PL', photovoltaic generating system is not powered, and battery energy storage system electric discharge meets the demand of specific load, and electrical network is from net; Return step G;
Step K 407: send load and do not meet alarm; Return step G;
Step L:
Step L01: whether detection meets PPV> PPV, MinIf meeting, going to step L02, otherwise, go to step L11;
Step L02: whether detection meets PPV> PLIf meeting, going to step L03, otherwise, go to step L05;
Step L03: whether detection meets battery energy storage system charging starting conditions, if met, goes to step L04, otherwise, go to step L08;
Step L04: Δ PL_PV=PPV-PLWhether detection meets battery energy storage system charging cut-off condition, if met, goes to step L08, otherwise, go to step L09;
Step L05: whether detection light photovoltaic generating system is powered can meet the demand of specific load, if met, goes to step L06, otherwise, go to step L11;
Step L06: whether detection meets battery energy storage system charge initiation condition, if met, goes to step L07, otherwise, go to step L11;
Step L07: whether detection meets battery energy storage system charging cut-off condition, if met, goes to step L11, otherwise, go to step L10;
Step L08: send load and do not meet alarm; Return step G;
Step L09: according to pattern 29 controlling run, Δ Pb=PPV-PLPhotovoltaic generating system is powered, and battery energy storage system charges, and electrical network is from net; Return step G;
Step L10: according to pattern 29 controlling run, Δ Pb=PPV-PL', photovoltaic generating system is powered and is met the demand of specific load, and battery energy storage system charges, and electrical network is from net; Return step G;
Step L11: send load and do not meet alarm; Return step G.
The existing advantage for prior art of the present invention is:
(1) formulate energy-storage units throwing in conjunction with battery energy storage system SOC and cut plan, alleviate intermittence and the fluctuation of distributed photovoltaic power generation self, it is to increase the access capability of distributed photovoltaic power generation and and network electric energy quality.
(2) energy exchange of accumulator system between the micro-net of grid-connected control and electrical network is realized.
(3) under net pattern, to ensure that system stability is as primary goal to greatest extent, exert oneself according to light volt, with load situation, accumulator system is carried out comprehensive regulation, realize power supply in micro-capacitance sensor to exert oneself and the real-time balance of load, adopt hierarchical control, wait when necessary and take cutting load/cut tractor driver's section, to maintain the power supply and demand balance of light-preserved system.
(4) control plan realize tank voltage source control with current source master mode between seamlessly transitting, it is ensured that micro-net and from net between seamless switching.
(5) when distribution network overhauls initiatively from, in network process, adopting the level and smooth method for handover control method without transient process; In distribution network generation fault and passive from network process, adopt the method for handover control based on hysteretic loop current control, shorten switching process, reduce the impact on load.
Accompanying drawing illustrates:
Fig. 1 is that distributed photovoltaic energy storage micro-grid system forms schematic diagram.
Fig. 2 is the seamless switching control sequential chart of distributed photovoltaic energy storage micro-capacitance sensor.
Fig. 3 is that distributed photovoltaic energy storage micro-grid connection runs control schema.
Fig. 4 is that distributed photovoltaic energy storage micro-capacitance sensor controls schema from network operation.
Embodiment:
Embodiment:
Below in conjunction with accompanying drawing 1-4, the invention will be further described.
In the present embodiment, distributed photovoltaic energy storage micro-capacitance sensor is built in residential quarter, industrial zone or the mixing of the two, and load comprises: factory building commercial power, apartment residential electricity consumption; Specific load is apartment load electricity consumption. Distributed photovoltaic energy storage micro-grid system comprises: photovoltaic generating system, battery energy storage system, load, micro-capacitance sensor supervisory system, as shown in Figure 1.
Distributed photovoltaic energy storage micro-capacitance sensor control strategy realizes by dispatcher software carrying out data exchange between configuration variables and configuration and control software design, and control software design is by carrying out data exchange between configuration variables and configuration and preposition machine software.
Prediction algorithm module and scheduling prediction module realize day ultra-short term and a few days ago predicting, predict a few days ago, it is the data (light volt intensity, load power etc.) using cumulative data (light volt intensity, load power etc.) to measure following a day (0 .-23 point) in advance before every night 24. Ultra-short term is predicted, also claims real-time estimate, according to the history run data (light volt intensity, load power etc.) before certain moment, and the data (light volt intensity, load power etc.) of prediction subsequent time.
Second level control: taking battery energy storage system SOC as criterion, if SOC out-of-limit (full or empty), then subtracts power supply (increasing load), or increases power supply (load shedding), and this is a set of logic, but value can according to Operating condition adjustment.
When distributed photovoltaic energy storage micro-capacitance sensor runs, distributed power source generating in micro-net is preferentially utilized to meet workload demand in principle, especially lie prostrate with the light of renewable energy power generation, under the prerequisite that most micro-capacitance sensor maximum capacity meets workload demand, realize the optimizing operation target of micro-capacitance sensor as far as possible.
System cloud gray model and power control: after system starts to run, whether check system possesses operational conditions, otherwise exits system. After system cloud gray model, carrying out data gathering, and carry out the secondary analysis of response data, the detection grid-connected switch state of electrical network, if grid-connected switch S Grid=1, enter grid-connect mode and run, grid-connected switch S Grid=0, enters from net net mode operation.
Distributed photovoltaic energy storage micro-capacitance sensor control strategy is specific as follows:
At also net state, micro-capacitance sensor networking operation, battery energy storage system is operated in invariable power (PQ) master mode, works as t1Battery energy storage system, when receiving active switching command, is carried out power adjustment by the time, and vacuum and permanent magnet quick make-and-break switch disconnects, and micro-capacitance sensor and electrical network depart from independent operating, and micro-net system performs from network operation control strategy; Now, battery energy storage system is operated in constant voltage/constant frequency control (V/f) pattern; Work as t5When reception is to grid-connected instruction, vacuum and permanent magnet quick make-and-break switch closes, and micro-capacitance sensor and grid network run, and battery energy storage system is operated in PQ pattern, and micro-net system performs to be incorporated into the power networks control strategy.
The described control strategy that is incorporated into the power networks is:
Steps A: judge whether system possesses operational conditions; If possessed, go to step B, otherwise terminate;
Step B: data gathering, calculating, data parameters comprises:
SOC: the state-of-charge of battery energy storage system work; Ub、Ib: battery energy storage system charging/discharging voltage, electric current;
SOCMin: the minimum SOC of battery energy storage system work; SOCMax: the maximum SOC of battery energy storage system work;
UB, Max: the stopping potential of battery energy storage system charge and discharge; IB, Min: the cut-off current of battery energy storage system charge and discharge;
tc_b、tdisc_b: the battery energy storage system continuous charge and discharge time;
tB, c_Max、tB, disc_Max: the maximum continuous charge and discharge time allowing the continuous charge and discharge of battery energy storage system;
PPV: the photovoltaic power generation system output power value in k moment;
PPV,Min: the minimum output power value that photovoltaic generating system can run;
Pb: the battery energy storage system output power value in k moment;
PL: the load power requirements in k moment;
ΔPPV_L: the P in k momentPV-PLAllow peak power difference;
ΔPG: the k moment needs the performance number that electrical network provides;
ΔPb: the k moment needs the performance number that battery energy storage system provides;
Step C: the state-of-charge (SOC state) of detection battery energy storage system; If SOC is >=SOCMax, go to step D, if SOCMin< SOC < SOCMax, go to step E, if SOC is < SOCMin, go to step F;
Step D: whether detection light photovoltaic generating system is grid-connected, if photovoltaic generating system is not grid-connected, provides garden load electricity consumption by battery energy storage system, if battery energy storage system can not meet garden workload demand, then not met part is from civilian electricity consumption electrical network power purchase; If light volt is grid-connected, whether garden workload demand can be met when then judging photovoltaic generating system and battery energy storage system muck in, if not meeting, then by battery energy storage system and the load electricity consumption of photovoltaic power generation system output power shared garden, not met part is from civilian electricity consumption electrical network power purchase; If garden workload demand can be met when photovoltaic generating system and battery energy storage system muck in, then judge that photovoltaic generating system is exerted oneself separately and whether can meet garden workload demand, if can not, then export with battery energy storage system and make up the performance number that photovoltaic power generation system output power does not meet workload demand part; If battery energy storage system can not normally be exerted oneself, then this portion of energy need to from civilian electricity consumption electrical network power purchase; When photovoltaic generating system exert oneself separately be greater than garden workload demand time, if whether photovoltaic generating system is exerted oneself can affect load power fluctuation, voltage is stablized, if the possibility of undirected domestic power grid feed, then need light volt part to abandon light, while meeting garden workload demand, do not affect the stabilization of power grids. Detailed process is as follows:
Step D01: whether detection meets PPV> PPV, MinIf meeting, going to step D02, otherwise, go to step D101-D106;
Step D02: whether detection meets PPV+Pb> PLIf meeting, going to step D03, otherwise, go to step D401-D404;
Step D03: whether detection meets PPV> PLIf meeting, going to step D301-D305, otherwise, go to step D201-D204;
Step D101: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step D103, otherwise, go to step D102;
Step D102: according to mode 3 controlling run, Δ PG=PL, photovoltaic generating system is not powered, battery energy storage system hot reserve, from electrical network power purchase; Return steps A;
Step D103: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step D102, otherwise, go to step D104;
Step D104: whether detection meets Pb≥PLIf meeting, going to step D105, otherwise, go to step D106;
Step D105: according to pattern 1 controlling run, that is: Δ Pb=PL, photovoltaic generating system is not powered, and battery energy storage system discharges, and grid-connected does not surf the Net; Return steps A;
Step D106: according to pattern 2 controlling run, that is: Δ PG=PL-Pb, photovoltaic generating system is powered, and battery energy storage system discharges, from electrical network power purchase; Return steps A;
Step D201: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step D203, otherwise, go to step D202;
Step D202: according to pattern 5 controlling run, that is: Δ PG=PL-PPV, photovoltaic generating system is powered, battery energy storage system hot reserve, from electrical network power purchase; Return steps A;
Step D203: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step D202, otherwise, go to step D204;
Step D204: according to pattern 4 controlling run, that is: Δ Pb=PL-PPV, photovoltaic generating system is powered, and battery energy storage system discharges, and grid-connected does not surf the Net; Return steps A;
Step D301: whether detection meets PPV-PL> Δ PPV_LIf meeting, going to step D303, otherwise, go to step D302;
Step D302: according to pattern 6 controlling run, that is: photovoltaic generating system is powered, battery energy storage system hot reserve, grid-connected does not surf the Net; Return steps A;
Step D303: whether detection light photovoltaic generating system meets grid-connected condition, if met, goes to step D304, otherwise, go to step D305;
Step D304: according to pattern 8 controlling run, that is: Δ PG=PPV-PL, photovoltaic generating system is powered, battery energy storage system hot reserve, electrical network feed; Return steps A;
Step D305: according to mode 7 controlling run, that is: photovoltaic generating system part abandons light, battery energy storage system hot reserve, grid-connected does not surf the Net; Return steps A;
Step D401: whether detection meets battery energy storage system electric discharge starting conditions, goes to step D403 if met, otherwise, go to step D402;
Step D402: according to pattern 5 controlling run, that is: Δ PG=PL-PPV, photovoltaic generating system is powered, battery energy storage system hot reserve, from electrical network power purchase; Return steps A;
Step D403: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step 402, otherwise, go to step D404;
Step D404: according to pattern 9 controlling run, that is: Δ PG=PL-(Pb+PPV), photovoltaic generating system is powered, and battery energy storage system discharges, from electrical network power purchase; Return steps A;
Step e: whether detection light photovoltaic generating system is grid-connected, if photovoltaic generating system is not grid-connected, provides garden load electricity consumption by battery energy storage system, if battery energy storage system can not meet garden workload demand, then not met part is from civilian electricity consumption electrical network power purchase;If photovoltaic generating system is grid-connected, whether garden workload demand can be met when then judging photovoltaic generating system and battery energy storage system muck in, if not meeting, then by battery energy storage system and the load electricity consumption of photovoltaic power generation system output power shared garden, not met part is from civilian electricity consumption electrical network power purchase; If garden workload demand can be met when photovoltaic generating system and battery energy storage system muck in, then judge that photovoltaic generating system is exerted oneself separately and whether can meet garden workload demand, if can not, then export with battery energy storage system and make up the performance number that photovoltaic power generation system output power does not meet garden workload demand part; If battery energy storage system can not normally be exerted oneself, then this portion of energy need to from civilian electricity consumption electrical network power purchase; When photovoltaic generating system exert oneself separately be greater than garden workload demand time, if battery possesses charge condition, then battery energy storage system and garden load are powered by photovoltaic generating system as load jointly, otherwise, then needing to consider to exert oneself photovoltaic generating system, whether to affect resident load fluctuation of power, voltage stable etc., if the possibility of undirected domestic power grid feed, then need photovoltaic generating system part to abandon light, while meeting garden workload demand, do not affect the stabilization of power grids. Detailed process is as follows:
Step e 01: whether detection meets PPV> PPV, MinIf meeting, going to step E02, otherwise, go to step E401-E406;
Step e 02: whether detection meets PPV+Pb> PLIf meeting, going to step E03, otherwise, go to step E301-E304;
Step e 03: whether detection meets PPV> PLIf meeting, going to step E101-E108, otherwise, go to step E201-E204;
Step e 101: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step E102, otherwise, go to step E104;
Step e 102: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step E104, otherwise, go to step E103;
Step e 103: according to pattern 10 controlling run, that is: Δ Pb=PL-PPV, photovoltaic generating system is powered, and battery energy storage system charges, and grid-connected does not surf the Net; Return steps A;
Step e 104: whether detection meets PPV-PL>ΔPPV_LIf meeting, going to step E106, otherwise, go to step E105;
Step e 105: according to pattern 6 controlling run, that is: photovoltaic generating system is powered, battery energy storage system hot reserve, grid-connected does not surf the Net; Return steps A;
Step e 106: whether detection light photovoltaic generating system meets grid-connected condition, as met, goes to step E108, otherwise, go to step E107;
Step e 107: according to mode 7 controlling run, that is: photovoltaic generating system part abandons light, battery energy storage system hot reserve, grid-connected does not surf the Net; Return steps A;
Step e 108: according to pattern 8 controlling run, that is: photovoltaic generating system is powered, battery energy storage system hot reserve, to electrical network feed; Return steps A;
Step e 201: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step E203, otherwise, go to step E202;
Step e 202: according to pattern 5 controlling run, that is: Δ PG=PL-PPV, photovoltaic generating system is powered, battery energy storage system hot reserve, from electrical network power purchase; Return steps A;
Step e 203: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step E202, otherwise, go to step E204;
Step e 204: according to pattern 4 controlling run, that is: Δ Pb=PL-PPV, photovoltaic generating system is powered, and battery energy storage system discharges, and grid-connected does not surf the Net;Return steps A;
Step e 301: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step E303, otherwise, go to step E302;
Step e 302: according to pattern 5 controlling run, that is: Δ PG=PL-PPV, photovoltaic generating system is powered, battery energy storage system hot reserve, from electrical network power purchase; Return steps A;
Step e 303: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step E302, otherwise, go to step E304;
Step e 304: according to pattern 9 controlling run, that is: Δ PG=PL-(PPV+Pb), photovoltaic generating system is powered, and battery energy storage system discharges, from electrical network power purchase; Return steps A;
Step e 401: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step E403, otherwise, go to step E402;
Step e 402: according to mode 3 controlling run, that is: Δ PG=PL, photovoltaic generating system is not powered, battery energy storage system hot reserve, from electrical network power purchase; Return steps A;
Step e 403: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step E402, otherwise, go to step E404;
Step e 404: whether detection meets Pb≥PLIf meeting, going to step E405, otherwise, go to step E406;
Step e 405: according to pattern 1 controlling run, that is: Δ Pb=PL, photovoltaic generating system is not powered, and battery energy storage system discharges, and grid-connected does not surf the Net; Return steps A;
Step e 406: according to pattern 2 controlling run, that is: Δ PG=PL-Pb, photovoltaic generating system is not powered, and battery energy storage system discharges, from electrical network power purchase; Return steps A;
Step F: judge whether battery energy storage system possesses charge condition, if possessing, then battery energy storage system and garden load are as load, if photovoltaic generating system is in generating state, it is then load supplying jointly by photovoltaic generating system and resident's electrical network, otherwise provides load power to support by resident's electrical network separately. Detailed process is as follows:
Step F 01: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step F03, otherwise, go to step F02;
Step F 02: according to pattern 10 controlling run, that is: Δ PG+PPV=PL, photovoltaic generating system is powered, and battery cold standby use, from electrical network power purchase; Return steps A;
Step F 03: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step F02, otherwise, go to step F04;
Step F 04: whether detection meets PPV> PPV, MinIf meeting, going to step F05, otherwise, go to step F06;
Step F 05: according to pattern 11 controlling run, that is: Δ PG+PPV=PL+Pb, photovoltaic generating system is powered, and battery energy storage system charges, from electrical network power purchase; Return steps A;
Step F 06: according to pattern 12 controlling run, that is: Δ PG=PL+Pb, photovoltaic generating system is not powered, and battery energy storage system charges, from electrical network power purchase; Return steps A.
When photovoltaic generating system go out fluctuation cause PCC point voltage fluctuation be greater than 10%, or distribution network be short-circuited fault time, just disconnect grid-connected switch, distributed photovoltaic energy storage micro-grid system run in island mode. Now, from network operation control strategy it is:
Step G: judge whether system possesses operational conditions; If possessed, go to step H, otherwise terminate;
Step H: data gathering, calculating, data parameters comprises:
SOC: the state-of-charge of battery energy storage system work; Ub、Ib: battery energy storage system charging/discharging voltage, electric current;
SOCMin: the minimum SOC of battery energy storage system work; SOCMax: the maximum SOC of battery energy storage system work;
UB, Max: the stopping potential of battery energy storage system charge and discharge; IB, Min: the cut-off current of battery energy storage system charge and discharge;
tc_b、tdisc_b: the battery energy storage system continuous charge and discharge time;
tB, c_Max、tB, disc_Max: the maximum continuous charge and discharge time allowing the continuous charge and discharge of battery energy storage system;
PPV: the photovoltaic power generation system output power value in k moment;
PPV, Min: the minimum output power value that photovoltaic generating system can run;
Pb: the battery energy storage system output power value in k moment;
PL: the load power requirements in k moment;
ΔPPV_L: the P in k momentPV-PLAllow peak power difference;
ΔPG: the k moment needs the performance number that electrical network provides;
ΔPb: the k moment needs the performance number that battery energy storage system provides;
PL': the specific load power demand value in k moment;
Step I: the state-of-charge (SOC state) of detection battery energy storage system; If SOC is >=SOCMax, go to step J, if SOCMin< SOC < SOCMax, go to step K, if SOC is < SOCMin, go to step L;
Step J: whether detection light photovoltaic generating system is grid-connected, if photovoltaic generating system is not grid-connected, garden load electricity consumption is provided by battery energy storage system, if battery energy storage system can not meet garden workload demand, when specific load (apartment load) demand can be ensured, the preferential need for electricity ensureing specific load, otherwise send load and do not meet alarm; If photovoltaic generating system is grid-connected, whether garden workload demand can be met when then judging photovoltaic generating system and battery energy storage system muck in, if not meeting, then by the need for electricity of battery energy storage system and light volt output rating shared specific load (apartment load), if still not meeting, then send load and do not meet alarm; If garden workload demand can be met when photovoltaic generating system and battery energy storage system muck in, then judge that photovoltaic generating system is exerted oneself separately and whether can meet garden workload demand, if can not, then export with battery energy storage system and make up the performance number that photovoltaic power generation system output power does not meet garden workload demand part; If battery energy storage system can not normally be exerted oneself, then photovoltaic power generation system output power preferentially meets specific load power demands, if can not meet, then sends load and does not meet alarm; When photovoltaic generating system exert oneself separately be greater than garden workload demand time, if photovoltaic generating system is exerted oneself, to affect load power fluctuation, voltage stable etc., then need photovoltaic generating system part to abandon light, do not affect the stabilization of power grids while meeting garden workload demand. Detailed process is as follows:
Step J01: whether detection meets PPV> PPV, MinIf meeting, going to step J02, otherwise, go to step J101-J107;
Step J02: whether detection meets PPV+Pb> PLIf meeting, going to step J03, otherwise, go to step J401-J406;
Step J03: whether detection meets PPV> PLIf meeting, going to step J301-J306, otherwise, go to step J201-J202;
Step J101: whether detection meets battery energy storage system electric discharge starting conditions, goes to step J103 if met, otherwise, go to step J102;
Step J102: send load and do not meet alarm; Return step G;
Step J103: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step J102, otherwise, go to step J104;
Step J104: whether detection meets Pb≥PLIf meeting, going to step J105, otherwise, go to step J106;
Step J105: according to pattern 21 controlling run, that is: Δ Pb=PL, photovoltaic generating system is not powered, and battery energy storage system discharges, and electrical network is from net; Return step G;
Step J106: whether detection battery energy storage system electric discharge can meet the demand of specific load, if can meet, goes to step J107, otherwise, go to step J102;
Step J107: according to pattern 22 controlling run, that is: Δ Pb=PL', photovoltaic generating system is not powered, and battery energy storage system electric discharge meets the demand of specific load, and electrical network is from net; Return step G;
Step J201: whether detection meets battery energy storage system electric discharge starting conditions, goes to step J202 if met, otherwise, go to step J203;
Step J202: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step J203, otherwise, go to step J204;
Step J203: whether detection light photovoltaic generating system can meet the demand of specific load, if can meet, goes to step J205, otherwise, go to step J206;
Step J204: according to pattern 23 controlling run, Δ Pb=PL-PPV, photovoltaic generating system is powered, and battery energy storage system discharges, and electrical network is from net; Return step G;
Step J205: according to pattern 24 controlling run, photovoltaic generating system is powered and is met the demand of specific load, battery energy storage system hot reserve, and electrical network is from net;
Step J206: send load and do not meet alarm; Return step G;
Step J301: whether detection meets PPV-PL> Δ PPV_LIf meeting, going to step J303, otherwise, go to step J302;
Step J302: according to pattern 25 controlling run, photovoltaic generating system is powered, battery energy storage system hot reserve, and electrical network is from net;
Step J303: according to pattern 26 controlling run, photovoltaic generating system part abandons light, battery energy storage system hot reserve, and electrical network is from net; Return step G;
Step J401: detection PPV+PbWhether meeting the demand of specific load, if met, going to step J403, otherwise, go to step J402;
Step J402: send load and do not meet alarm; Return step G;
Step J403: whether detection meets battery energy storage system electric discharge starting conditions, goes to step J404 if met, otherwise, go to step J405;
Step J404: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step J405, otherwise, go to step J406;
Step J405: whether detection light photovoltaic generating system is powered separately can meet the demand of specific load, if can meet, goes to step J407, otherwise, go to step J402;
Step J406: according to pattern 27 controlling run, Δ Pb=PL′-PPV, photovoltaic generating system is powered, and battery energy storage system discharges, and the two meets the demand of specific load jointly, and electrical network is from net; Return step G;
Step J407: according to pattern 24 controlling run, PL'=PPV, photovoltaic generating system is powered, and meets the demand of specific load, and electrical network is from net; Return step G;
Step K: whether detection light photovoltaic generating system is grid-connected, if photovoltaic generating system is not grid-connected, provides garden load electricity consumption by battery energy storage system, if when battery energy storage system can not meet garden workload demand, preferentially meet specific load power demands, if can not meet, then send load and do not meet alarm; If photovoltaic generating system is grid-connected, whether garden workload demand can be met when then judging photovoltaic generating system and battery energy storage system muck in, if not meeting, jointly generating electricity by battery energy storage system and photovoltaic generating system and preferentially meeting specific load power demands, otherwise sending load and do not meet alarm;If garden workload demand can be met when photovoltaic generating system and battery energy storage system muck in, then judge that photovoltaic generating system is exerted oneself separately and whether can meet garden workload demand, if can not, then export with battery energy storage system and make up the performance number that photovoltaic power generation system output power does not meet workload demand part; If battery energy storage system can not normally be exerted oneself, preferentially meeting specific load power demands with photovoltaic power generation system output power, unnecessary portion of energy is absorbed by battery energy storage system, if not meeting specific load demand, then sends load and does not meet warning; When photovoltaic generating system exert oneself separately be greater than garden workload demand time, if battery possesses charge condition, then battery energy storage system and garden load are powered by photovoltaic generating system as load jointly; When photovoltaic generating system is exerted oneself excessive affects resident load fluctuation of power, voltage is stablized, then need photovoltaic generating system part to abandon light, while meeting garden workload demand, do not affect the stabilization of power grids. Detailed process is as follows:
Step K 01: whether detection meets PPV> PPV, MinIf meeting, going to step K02, otherwise, go to step K401-K407;
Step K 02: whether detection meets PPV+Pb> PLIf met, go to step K03, otherwise, go to step K301-K307;
Step K 03: whether detection meets PPV> PLIf meeting, going to step K101-K106, otherwise, go to step K201-K206;
Step K 101: whether detection meets battery energy storage system charging starting conditions, if met, goes to step K102, otherwise, go to step K103;
Step K 102: Δ PL_PV=PPV-PL, whether detection meets battery energy storage system charging cut-off condition, if met, goes to step K103, otherwise, go to step K106;
Step K 103: whether detection meets PPV-PL>ΔPPV_LIf meeting, going to step K105, otherwise, go to step K104;
Step K 104: according to pattern 25 controlling run, that is: photovoltaic generating system is powered, battery energy storage system hot reserve, and electrical network is from net; Return step G;
Step K 105: according to pattern 26 controlling run, that is: photovoltaic generating system part abandons light, battery energy storage system hot reserve, and electrical network is from net; Return step G;
Step K 106: according to pattern 28 controlling run, that is: Δ Pb=PL-PPV, photovoltaic generating system is powered, and battery energy storage system charges, and electrical network is from net; Return step G;
Step K 201: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step K202, otherwise, go to step K203;
Step K 202: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step K203, otherwise, go to step K204;
Step K 203: whether detection light photovoltaic generating system is powered meets the demand of specific load, if met, goes to step K205, otherwise, go to step K206;
Step K 204: according to pattern 23 controlling run, that is: photovoltaic generating system is powered, battery energy storage system discharges, and electrical network is from net; Return step G;
Step K 205: according to pattern 27 controlling run, that is: adjust photovoltaic generating system so that it is output rating meets the demand of specific load, and electrical network is from net; Return step G;
Step K 206: send load and do not meet alarm; Return step G;
Step K 301: whether detection light photovoltaic generating system is powered and battery energy storage system discharges can meet the demand of specific load, if met, goes to step K302, otherwise, go to step K307;
Step K 302: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step K303, otherwise, go to step K304;
Step K 303: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step K304, otherwise, go to step K305;
Step K 304: whether detection light photovoltaic generating system is powered can meet the demand of specific load, if met, goes to step K306, otherwise, go to step K307;
Step K 305: according to pattern 27 controlling run, that is: Δ Pb=PL′-PPV, photovoltaic generating system is powered, and battery energy storage system discharges, and the two meets the demand of specific load jointly, and electrical network is from net; Return step G;
Step K 306: according to pattern 28 controlling run, PPV=PL', adjustment photovoltaic generating system so that it is output rating meets the demand of specific load, the outer portion power of the demand of specific load is battery energy storage system charging, and electrical network is from net; Return step G;
Step K 307: send load and do not meet alarm; Return step G;
Step K 401: whether detection meets battery energy storage system electric discharge starting conditions, goes to step K402 if met, otherwise, go to step K407;
Step K 402: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step K407, otherwise, go to step K403;
Step K 403: whether detection meets Δ Pb≥PL, as met, go to step K405, otherwise, go to step K404;
Step K 404: whether battery energy storage system is powered separately can meet the demand of specific load, if can meet, goes to step K406, otherwise, go to step K407;
Step K 405: according to pattern 21 controlling run, Δ Pb=PL, photovoltaic generating system is not powered, and battery energy storage system discharges, and electrical network is from net; Return step G;
Step K 406: according to pattern 22 controlling run, Δ Pb=PL', photovoltaic generating system is not powered, and battery energy storage system electric discharge meets the demand of specific load, and electrical network is from net; Return step G;
Step K 407: send load and do not meet alarm; Return step G;
Step L: if photovoltaic generating system does not generate electricity, then send load and do not meet warning; Photovoltaic generating system then needs to lie prostrate while output rating preferentially meets garden workload demand according to light to be charged by battery energy storage system; If photovoltaic power generation system output power can not meet garden workload demand, while preferentially meeting specific load, the unnecessary power of photovoltaic generating system is absorbed by battery energy storage system; When photovoltaic generating system self generating still can not meet specific load demand, send load and do not meet warning. Detailed process is as follows:
Step L01: whether detection meets PPV> PPV, MinIf meeting, going to step L02, otherwise, go to step L11;
Step L02: whether detection meets PPV> PLIf meeting, going to step L03, otherwise, go to step L05;
Step L03: whether detection meets battery energy storage system charging starting conditions, if met, goes to step L04, otherwise, go to step L08;
Step L04: Δ PL_PV=PPV-PLWhether detection meets battery energy storage system charging cut-off condition, if met, goes to step L08, otherwise, go to step L09;
Step L05: whether detection light photovoltaic generating system is powered can meet the demand of specific load, if met, goes to step L06, otherwise, go to step L08;
Step L06: whether detection meets battery energy storage system charge initiation condition, if met, goes to step L07, otherwise, go to step L08;
Step L07: whether detection meets battery energy storage system charging cut-off condition, if met, goes to step L11, otherwise, go to step L10;
Step L08: send load and do not meet alarm; Return step G;
Step L09: according to pattern 29 controlling run, Δ Pb=PPV-PLPhotovoltaic generating system is powered, and battery energy storage system charges, and electrical network is from net; Return step G;
Step L10: according to mode 30 controlling run, Δ Pb=PPV-PL', photovoltaic generating system is powered and is met the demand of specific load, and battery energy storage system charges, and electrical network is from net; Return step G.

Claims (5)

1. distributed photovoltaic energy storage micro-grid connection control strategy, described micro-capacitance sensor comprises: photovoltaic generating system, battery energy storage system, load, micro-capacitance sensor comprehensive monitoring system; It is characterized in that, cutting-in control strategy is as follows:
Steps A: judge whether system possesses operational conditions; If possessed, go to step B, otherwise, terminate;
Step B: data gathering, calculating, data parameters comprises:
SOC: the state-of-charge of battery energy storage system work; Ub、Ib: battery energy storage system charging/discharging voltage, electric current;
SOCMin: the minimum SOC of battery energy storage system work; SOCMax: the maximum SOC of battery energy storage system work;
UB, Max: the stopping potential of battery energy storage system charge and discharge; IB, Min: the cut-off current of battery energy storage system charge and discharge;
tc_b、tdisc_b: the battery energy storage system continuous charge and discharge time;
tB, c_Max、tB, disc_Max: the maximum continuous charge and discharge time allowing the continuous charge and discharge of battery energy storage system;
PPV: the photovoltaic power generation system output power value in k moment;
PPV, Min: the minimum output power value that photovoltaic generating system can run;
Pb: the battery energy storage system output power value in k moment;
PL: the load power requirements in k moment;
ΔPPV_L: the P in k momentPV-PLAllow peak power difference;
ΔPG: the k moment needs the performance number that electrical network provides;
ΔPb: the k moment needs the performance number that battery energy storage system provides;
Step C: the state-of-charge (SOC state) of detection battery energy storage system; If SOC >=SOCMax, go to step D, if SOCMin<SOC<SOCMax, go to step E, if SOC is < SOCMin, go to step F;
Step D:
Step D01: whether detection meets PPV> PPV, MinIf meeting, going to step D02, otherwise, go to step D101-D106;
Step D02: whether detection meets PPV+Pb> PLIf meeting, going to step D03, otherwise, go to step D401-D404;
Step D03: whether detection meets PPV> PLIf meeting, going to step D301-D305, otherwise, go to step D201-D204;
Step D101: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step D103, otherwise, go to step D102;
Step D102: according to mode 3 controlling run, Δ PG=PL, photovoltaic generating system is not powered, battery energy storage system hot reserve, from electrical network power purchase; Return steps A;
Step D103: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step D102, otherwise, go to step D104;
Step D104: whether detection meets Pb≥PLIf meeting, going to step D105, otherwise, go to step D106;
Step D105: according to pattern 1 controlling run, that is: Δ Pb=PL, photovoltaic generating system is not powered, and battery energy storage system discharges, and grid-connected does not surf the Net; Return steps A;
Step D106: according to pattern 2 controlling run, that is: Δ PG=PL-Pb, photovoltaic generating system is powered, and battery energy storage system discharges, from electrical network power purchase; Return steps A;
Step D201: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step D203, otherwise, go to step D202;
Step D202: according to pattern 5 controlling run, that is: Δ PG=PL-PPV, photovoltaic generating system is powered, battery energy storage system hot reserve, from electrical network power purchase; Return steps A;
Step D203: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step D202, otherwise, go to step D204;
Step D204: according to pattern 4 controlling run, that is: Δ Pb=PL-PPV, photovoltaic generating system is powered, and battery energy storage system discharges, and grid-connected does not surf the Net; Return steps A;
Step D301: whether detection meets PPV-PL> Δ PPV_LIf meeting, going to step D303, otherwise, go to step D302;
Step D302: according to pattern 6 controlling run, that is: photovoltaic generating system is powered, battery energy storage system hot reserve, grid-connected does not surf the Net; Return steps A;
Step D303: whether detection light photovoltaic generating system meets grid-connected condition, if met, goes to step D304, otherwise, go to step D305;
Step D304: according to pattern 8 controlling run, that is: Δ PG=PPV-PL, photovoltaic generating system is powered, battery energy storage system hot reserve, electrical network feed; Return steps A;
Step D305: according to mode 7 controlling run, that is: photovoltaic generating system part abandons light, battery energy storage system hot reserve, grid-connected does not surf the Net; Return steps A;
Step D401: whether detection meets battery energy storage system electric discharge starting conditions, goes to step D403 if met, otherwise, go to step D402;
Step D402: according to pattern 5 controlling run, that is: Δ PG=PL-PPV, photovoltaic generating system is powered, battery energy storage system hot reserve, from electrical network power purchase; Return steps A;
Step D403: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step 402, otherwise, go to step D404;
Step D404: according to pattern 9 controlling run, that is: Δ PG=PL-(Pb+PPV), photovoltaic generating system is powered, and battery energy storage system discharges, from electrical network power purchase; Return steps A;
Step e:
Step e 01: whether detection meets PPV> PPV, MinIf meeting, going to step E02, otherwise, go to step E401-E406;
Step e 02: whether detection meets PPV+Pb> PLIf meeting, going to step E03, otherwise, go to step E301-E304;
Step e 03: whether detection meets PPV> PLIf meeting, going to step E101-E108, otherwise, go to step E201-E204;
Step e 101: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step E102, otherwise, go to step E104;
Step e 102: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step E104, otherwise, go to step E103;
Step e 103: according to pattern 10 controlling run, that is: Δ Pb=PL-PPV, photovoltaic generating system is powered, and battery energy storage system charges, and grid-connected does not surf the Net; Return steps A;
Step e 104: whether detection meets PPV-PL> Δ PPV_LIf meeting, going to step E106, otherwise, go to step E105;
Step e 105: according to pattern 6 controlling run, that is: photovoltaic generating system is powered, battery energy storage system hot reserve, grid-connected does not surf the Net; Return steps A;
Step e 106: whether detection light photovoltaic generating system meets grid-connected condition, as met, goes to step E108, otherwise, go to step E107;
Step e 107: according to mode 7 controlling run, that is: photovoltaic generating system part abandons light, battery energy storage system hot reserve, grid-connected does not surf the Net;Return steps A;
Step e 108: according to pattern 8 controlling run, that is: photovoltaic generating system is powered, battery energy storage system hot reserve, to electrical network feed; Return steps A;
Step e 201: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step E203, otherwise, go to step E202;
Step e 202: according to pattern 5 controlling run, that is: Δ PG=PL-PPV, photovoltaic generating system is powered, battery energy storage system hot reserve, from electrical network power purchase; Return steps A;
Step e 203: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step E202, otherwise, go to step E204;
Step e 204: according to pattern 4 controlling run, that is: Δ Pb-PL-PPV, photovoltaic generating system is powered, and battery energy storage system discharges, and grid-connected does not surf the Net; Return steps A;
Step e 301: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step E303, otherwise, go to step E302;
Step e 302: according to pattern 5 controlling run, that is: Δ PG=PL-PPV, photovoltaic generating system is powered, battery energy storage system hot reserve, from electrical network power purchase; Return steps A;
Step e 303: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step E302, otherwise, go to step E304;
Step e 304: according to pattern 9 controlling run, that is: Δ PG=PL-(PPV+Pb), photovoltaic generating system is powered, and battery energy storage system discharges, from electrical network power purchase; Return steps A;
Step e 401: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step E403, otherwise, go to step E402;
Step e 402: according to mode 3 controlling run, that is: Δ PG=PL, photovoltaic generating system is not powered, battery energy storage system hot reserve, from electrical network power purchase; Return steps A;
Step e 403: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step E402, otherwise, go to step E404;
Step e 404: whether detection meets Pb≥PLIf meeting, going to step E405, otherwise, go to step E406;
Step e 405: according to pattern 1 controlling run, that is: Δ Pb=PL, photovoltaic generating system is not powered, and battery energy storage system discharges, and grid-connected does not surf the Net; Return steps A;
Step e 406: according to pattern 2 controlling run, that is: Δ PG=PL-Pb, photovoltaic generating system is not powered, and battery energy storage system discharges, from electrical network power purchase; Return steps A;
Step F:
Step F 01: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step F03, otherwise, go to step F02;
Step F 02: according to pattern 10 controlling run, that is: Δ PG+PPV=PL, photovoltaic generating system is powered, and battery cold standby use, from electrical network power purchase; Return steps A;
Step F 03: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step F02, otherwise, go to step F04;
Step F 04: whether detection meets PPV> PPV, MinIf meeting, going to step F05, otherwise, go to step F06;
Step F 05: according to pattern 11 controlling run, that is: Δ PG+PPV=PL+Pb, photovoltaic generating system is powered, and battery energy storage system charges, from electrical network power purchase; Return steps A;
Step F 06: according to pattern 12 controlling run, that is: Δ PG=PL+Pb, photovoltaic generating system is not powered, and battery energy storage system charges, from electrical network power purchase; Return steps A.
2. distributed photovoltaic energy storage micro-capacitance sensor is from net control strategy, and described micro-capacitance sensor comprises: photovoltaic generating system, battery energy storage system, load, micro-capacitance sensor comprehensive monitoring system;It is characterized in that, as follows from net control strategy:
Step G: judge whether system possesses operational conditions; If possessed, go to step H, otherwise, terminate;
Step H: data gathering, calculating, data parameters comprises:
SOC: the state-of-charge of battery energy storage system work; Ub、Ib: battery energy storage system charging/discharging voltage, electric current;
SOCMin: the minimum SOC of battery energy storage system work; SOCMax: the maximum SOC of battery energy storage system work;
UB, Max: the stopping potential of battery energy storage system charge and discharge; IB, Min: the cut-off current of battery energy storage system charge and discharge;
tc_b、tdisc_b: the battery energy storage system continuous charge and discharge time;
tB, c_Max、tB, disc_Max: the maximum continuous charge and discharge time allowing the continuous charge and discharge of battery energy storage system;
PPV: the photovoltaic power generation system output power value in k moment;
PPV, Min: the minimum output power value that photovoltaic generating system can run;
Pb: the battery energy storage system output power value in k moment;
PL: the load power requirements in k moment;
ΔPPV_L: the P in k momentPV-PLAllow peak power difference;
ΔPG: the k moment needs the performance number that electrical network provides;
ΔPb: the k moment needs the performance number that battery energy storage system provides;
P′L: the specific load power demand value in k moment;
Step I: the state-of-charge (SOC state) of detection battery energy storage system; If SOC >=SOCMax, go to step J, if SOCMin<SOC<SOCMax, go to step K, if SOC is < SOCMin, go to step L;
Step J:
Step J01: whether detection meets PPV> PPV, MinIf meeting, going to step J02, otherwise, go to step J101-J107;
Step J02: whether detection meets PPV+Pb> PLIf meeting, going to step J03, otherwise, go to step J401-J406;
Step J03: whether detection meets PPV> PLIf meeting, going to step J301-J306, otherwise, go to step J201-J202;
Step J101: whether detection meets battery energy storage system electric discharge starting conditions, goes to step J103 if met, otherwise, go to step J102;
Step J102: send load and do not meet alarm; Return step G;
Step J103: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step J102, otherwise, go to step J104;
Step J104: whether detection meets Pb≥PLIf meeting, going to step J105, otherwise, go to step J106;
Step J1O5: according to pattern 21 controlling run, that is: Δ Pb=PL, photovoltaic generating system is not powered, and battery energy storage system discharges, and electrical network is from net; Return step G;
Step J106: whether detection battery energy storage system electric discharge can meet the demand of specific load, if can meet, goes to step J107, otherwise, go to step J102;
Step J107: according to pattern 22 controlling run, that is: Δ Pb=PL', photovoltaic generating system is not powered, and battery energy storage system electric discharge meets the demand of specific load, and electrical network is from net; Return step G;
Step J201: whether detection meets battery energy storage system electric discharge starting conditions, goes to step J202 if met, otherwise, go to step J203;
Step J202: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step J203, otherwise, go to step J204;
Step J203: whether detection light photovoltaic generating system can meet the demand of specific load, if can meet, goes to step J205, otherwise, go to step J206;
Step J204: according to pattern 23 controlling run, Δ Pb=PL-PPV, photovoltaic generating system is powered, and battery energy storage system discharges, and electrical network is from net;Return step G;
Step J205: according to pattern 24 controlling run, photovoltaic generating system is powered and is met the demand of specific load, battery energy storage system hot reserve, and electrical network is from net;
Step J206: send load and do not meet alarm; Return step G;
Step J301: whether detection meets PPV-PL> Δ PPV_LIf meeting, going to step J303, otherwise, go to step J302;
Step J302: according to pattern 25 controlling run, photovoltaic generating system is powered, battery energy storage system hot reserve, and electrical network is from net;
Step J303: according to pattern 26 controlling run, photovoltaic generating system part abandons light, battery energy storage system hot reserve, and electrical network is from net; Return step G;
Step J401: detection PPV+PbWhether meeting the demand of specific load, if met, going to step J403, otherwise, go to step J402;
Step J402: send load and do not meet alarm; Return step G;
Step J403: whether detection meets battery energy storage system electric discharge starting conditions, goes to step J404 if met, otherwise, go to step J405;
Step J404: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step J405, otherwise, go to step J406;
Step J405: whether detection light photovoltaic generating system is powered separately can meet the demand of specific load, if can meet, goes to step J407, otherwise, go to step J402;
Step J406: according to pattern 27 controlling run, Δ Pb=PL′-PPV, photovoltaic generating system is powered, and battery energy storage system discharges, and the two meets the demand of specific load jointly, and electrical network is from net; Return step G;
Step J407: according to pattern 24 controlling run, PL'=PPV, photovoltaic generating system is powered, and meets the demand of specific load, and electrical network is from net; Return step G;
Step K:
Step K 01: whether detection meets PPV> PPV, MinIf meeting, going to step K02, otherwise, go to step K401-K407;
Step K 02: whether detection meets PPV+Pb> PLIf meeting, going to step K03, otherwise, go to step K301-K307;
Step K 03: whether detection meets PPV> PLIf meeting, going to step K101-K106, otherwise, go to step K201-K206;
Step K 101: whether detection meets battery energy storage system charging starting conditions, if met, goes to step K102, otherwise, go to step K103;
Step K 102: Δ PL_PV=PPV-PL, whether detection meets battery energy storage system charging cut-off condition, if met, goes to step K103, otherwise, go to step K106;
Step K 103: whether detection meets PPV-PL> Δ PPV_LIf meeting, going to step K105, otherwise, go to step K104;
Step K 104: according to pattern 25 controlling run, that is: photovoltaic generating system is powered, battery energy storage system hot reserve, and electrical network is from net; Return step G;
Step K 105: according to pattern 26 controlling run, that is: photovoltaic generating system part abandons light, battery energy storage system hot reserve, and electrical network is from net; Return step G;
Step K 106: according to pattern 28 controlling run, that is: Δ Pb=PL-PPV, photovoltaic generating system is powered, and battery energy storage system charges, and electrical network is from net; Return step G;
Step K 201: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step K202, otherwise, go to step K203;
Step K 202: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step K203, otherwise, go to step K204;
Step K 203: whether detection light photovoltaic generating system is powered meets the demand of specific load, if met, goes to step K205, otherwise, go to step K206;
Step K 204: according to pattern 23 controlling run, that is: photovoltaic generating system is powered, battery energy storage system discharges, and electrical network is from net; Return step G;
Step K 205: according to pattern 27 controlling run, that is: adjust photovoltaic generating system so that it is output rating meets the demand of specific load, and electrical network is from net; Return step G;
Step K 206: send load and do not meet alarm; Return step G;
Step K 301: whether detection light photovoltaic generating system is powered and battery energy storage system discharges can meet the demand of specific load, if met, goes to step K302, otherwise, go to step K307;
Step K 302: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step K303, otherwise, go to step K304;
Step K 303: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step K304, otherwise, go to step K305;
Step K 304: whether detection light photovoltaic generating system is powered can meet the demand of specific load, if met, goes to step K306, otherwise, go to step K307;
Step K 305: according to pattern 27 controlling run, that is: Δ Pb=PL′-PPV, photovoltaic generating system is powered, and battery energy storage system discharges, and the two meets the demand of specific load jointly, and electrical network is from net; Return step G;
Step K 306: according to pattern 28 controlling run, PPV=PL', adjustment photovoltaic generating system so that it is output rating meets the demand of specific load, the outer portion power of the demand of specific load is battery energy storage system charging, and electrical network is from net; Return step G;
Step K 307: send load and do not meet alarm; Return step G;
Step K 401: whether detection meets battery energy storage system electric discharge starting conditions, goes to step K402 if met, otherwise, go to step K407;
Step K 402: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step K407, otherwise, go to step K403;
Step K 403: whether detection meets Pb≥PL, as met, go to step K405, otherwise, go to step K404;
Step K 404: whether battery energy storage system is powered separately can meet the demand of specific load, if can meet, goes to step K406, otherwise, go to step K407;
Step K 405: according to pattern 21 controlling run, Δ Pb=PL, photovoltaic generating system is not powered, and battery energy storage system discharges, and electrical network is from net; Return step G;
Step K 406: according to pattern 22 controlling run, Δ Pb=PL', photovoltaic generating system is not powered, and battery energy storage system electric discharge meets the demand of specific load, and electrical network is from net; Return step G;
Step K 407: send load and do not meet alarm; Return step G;
Step L:
Step L01: whether detection meets PPV> PPV, MinIf meeting, going to step L02, otherwise, go to step L11;
Step L02: whether detection meets PPV> PLIf meeting, going to step L03, otherwise, go to step L05;
Step L03: whether detection meets battery energy storage system charging starting conditions, if met, goes to step L04, otherwise, go to step L08;
Step L04: Δ PL_PV=PPV-PL, whether detection meets battery energy storage system charging cut-off condition, if met, goes to step L08, otherwise, go to step L09;
Step L05: whether detection light photovoltaic generating system is powered can meet the demand of specific load, if met, goes to step L06, otherwise, go to step L08;
Step L06: whether detection meets battery energy storage system charge initiation condition, if met, goes to step L07, otherwise, go to step L08;
Step L07: whether detection meets battery energy storage system charging cut-off condition, if met, goes to step L11, otherwise, go to step L10;
Step L08: send load and do not meet alarm; Return step G;
Step L09: according to pattern 29 controlling run, Δ Pb=PPV-PL, photovoltaic generating system is powered, and battery energy storage system charges, and electrical network is from net; Return step G;
Step L10: according to mode 30 controlling run, Δ Pb=PPV-PL', photovoltaic generating system is powered and is met the demand of specific load, and battery energy storage system charges, and electrical network is from net; Return step G.
3. distributed photovoltaic energy storage micro-capacitance sensor control strategy, described micro-capacitance sensor comprises: photovoltaic generating system, battery energy storage system, load, micro-capacitance sensor comprehensive monitoring system; It is characterized in that, control strategy is as follows:
At also net state, micro-capacitance sensor networking operation, battery energy storage system is operated in invariable power (PQ) master mode, works as t1Battery energy storage system, when receiving active switching command, is carried out power adjustment by the time, and vacuum and permanent magnet quick make-and-break switch disconnects, and micro-capacitance sensor and electrical network depart from independent operating, and micro-net system performs from network operation control strategy; Now, battery energy storage system is operated in constant voltage/constant frequency control (V/f) pattern; Work as t5When reception is to grid-connected instruction, vacuum and permanent magnet quick make-and-break switch closes, and micro-capacitance sensor and grid network run, and battery energy storage system is operated in PQ pattern, and micro-net system performs to be incorporated into the power networks control strategy.
4. distributed photovoltaic energy storage micro-capacitance sensor control strategy according to claim 3, it is characterised in that, described in the control strategy that is incorporated into the power networks be:
Steps A: judge whether system possesses operational conditions; If possessed, go to step B, otherwise, terminate;
Step B: data gathering, calculating, data parameters comprises:
SOC: the state-of-charge of battery energy storage system work; Ub、Ib: battery energy storage system charging/discharging voltage, electric current;
SOCMin: the minimum SOC of battery energy storage system work; SOCMax: the maximum SOC of battery energy storage system work;
UB, Max: the stopping potential of battery energy storage system charge and discharge; IB, Min: the cut-off current of battery energy storage system charge and discharge;
tc_b、tdisc_b: the battery energy storage system continuous charge and discharge time;
tB, c_Max、tb_disc_Max: the maximum continuous charge and discharge time allowing the continuous charge and discharge of battery energy storage system;
PPV: the photovoltaic power generation system output power value in k moment;
PPV, Min: the minimum output power value that photovoltaic generating system can run;
Pb: the battery energy storage system output power value in k moment;
PL: the load power requirements in k moment;
ΔPPV_L: the P in k momentPV-PLAllow peak power difference;
ΔPG: the k moment needs the performance number that electrical network provides;
ΔPb: the k moment needs the performance number that battery energy storage system provides;
Step C: the state-of-charge (SOC state) of detection battery energy storage system; If SOC >=SOCMax, go to step D, if SOCMin<SOC<SOCMax, go to step E, if SOC is < SOCMin, go to step F;
Step D:
Step D01: whether detection meets PPV> PPV, MinIf meeting, going to step D02, otherwise, go to step D101-D106;
Step D02: whether detection meets PPV+Pb> PLIf meeting, going to step D03, otherwise, go to step D401-D404;
Step D03: whether detection meets PPV> PLIf meeting, going to step D301-D305, otherwise, go to step D201-D204;
Step D101: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step D103, otherwise, go to step D102;
Step D102: according to mode 3 controlling run, Δ PG=PL, photovoltaic generating system is not powered, battery energy storage system hot reserve, from electrical network power purchase; Return steps A;
Step D103: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step D102, otherwise, go to step D104;
Step D104: whether detection meets Pb≥PLIf meeting, going to step D105, otherwise, go to step D106;
Step D105: according to pattern 1 controlling run, that is: Δ Pb=PL, photovoltaic generating system is not powered, and battery energy storage system discharges, and grid-connected does not surf the Net; Return steps A;
Step D106: according to pattern 2 controlling run, that is: Δ PG=PL-Pb, photovoltaic generating system is powered, and battery energy storage system discharges, from electrical network power purchase; Return steps A;
Step D201: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step D203, otherwise, go to step D202;
Step D202: according to pattern 5 controlling run, that is: Δ PG=PL-PPV, photovoltaic generating system is powered, battery energy storage system hot reserve, from electrical network power purchase; Return steps A;
Step D203: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step D202, otherwise, go to step D204;
Step D204: according to pattern 4 controlling run, that is: Δ Pb=PL-PPV, photovoltaic generating system is powered, and battery energy storage system discharges, and grid-connected does not surf the Net; Return steps A;
Step D301: whether detection meets PPV-PL> Δ PPV_LIf meeting, going to step D303, otherwise, go to step D302;
Step D302: according to pattern 6 controlling run, that is: photovoltaic generating system is powered, battery energy storage system hot reserve, grid-connected does not surf the Net; Return steps A;
Step D303: whether detection light photovoltaic generating system meets grid-connected condition, if met, goes to step D304, otherwise, go to step D305;
Step D304: according to pattern 8 controlling run, that is: Δ PG=PPV-PL, photovoltaic generating system is powered, battery energy storage system hot reserve, electrical network feed; Return steps A;
Step D305: according to mode 7 controlling run, that is: photovoltaic generating system part abandons light, battery energy storage system hot reserve, grid-connected does not surf the Net; Return steps A;
Step D401: whether detection meets battery energy storage system electric discharge starting conditions, goes to step D403 if met, otherwise, go to step D402;
Step D402: according to pattern 5 controlling run, that is: Δ PG=PL-PPV, photovoltaic generating system is powered, battery energy storage system hot reserve, from electrical network power purchase; Return steps A;
Step D403: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step 402, otherwise, go to step D404;
Step D404: according to pattern 9 controlling run, that is: Δ PG=PL-(Pb+PPV), photovoltaic generating system is powered, and battery energy storage system discharges, from electrical network power purchase; Return steps A;
Step e:
Step e 01: whether detection meets PPV> PPV, MinIf meeting, going to step E02, otherwise, go to step E401-E406;
Step e 02: whether detection meets PPV+Pb> PLIf meeting, going to step E03, otherwise, go to step E301-E304;
Step e 03: whether detection meets PPV> PLIf meeting, going to step E101-E108, otherwise, go to step E201-E204;
Step e 101: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step E102, otherwise, go to step E104;
Step e 102: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step E104, otherwise, go to step E103;
Step e 103: according to pattern 10 controlling run, that is: Δ Pb=PL-PPV, photovoltaic generating system is powered, and battery energy storage system charges, and grid-connected does not surf the Net; Return steps A;
Step e 104: whether detection meets PPV-PL> Δ PPV_LIf meeting, going to step E106, otherwise, go to step E105;
Step e 105: according to pattern 6 controlling run, that is: photovoltaic generating system is powered, battery energy storage system hot reserve, grid-connected does not surf the Net; Return steps A;
Step e 106: whether detection light photovoltaic generating system meets grid-connected condition, as met, goes to step E108, otherwise, go to step E107;
Step e 107: according to mode 7 controlling run, that is: photovoltaic generating system part abandons light, battery energy storage system hot reserve, grid-connected does not surf the Net; Return steps A;
Step e 108: according to pattern 8 controlling run, that is: photovoltaic generating system is powered, battery energy storage system hot reserve, to electrical network feed; Return steps A;
Step e 201: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step E203, otherwise, go to step E202;
Step e 202: according to pattern 5 controlling run, that is: Δ PG=PL-PPV, photovoltaic generating system is powered, battery energy storage system hot reserve, from electrical network power purchase; Return steps A;
Step e 203: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step E202, otherwise, go to step E204;
Step e 204: according to pattern 4 controlling run, that is: Δ Pb=PL-PPV, photovoltaic generating system is powered, and battery energy storage system discharges, and grid-connected does not surf the Net; Return steps A;
Step e 301: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step E303, otherwise, go to step E302;
Step e 302: according to pattern 5 controlling run, that is: Δ PG=PL-PPV, photovoltaic generating system is powered, battery energy storage system hot reserve, from electrical network power purchase; Return steps A;
Step e 303: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step E302, otherwise, go to step E304;
Step e 304: according to pattern 9 controlling run, that is: Δ PG=PL-(PPV+Pb), photovoltaic generating system is powered, and battery energy storage system discharges, from electrical network power purchase; Return steps A;
Step e 401: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step E403, otherwise, go to step E402;
Step e 402: according to mode 3 controlling run, that is: Δ PG=PL, photovoltaic generating system is not powered, battery energy storage system hot reserve, from electrical network power purchase; Return steps A;
Step e 403: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step E402, otherwise, go to step E404;
Step e 404: whether detection meets Pb≥PLIf meeting, going to step E405, otherwise, go to step E406;
Step e 405: according to pattern 1 controlling run, that is: Δ Pb=PL, photovoltaic generating system is not powered, and battery energy storage system discharges, and grid-connected does not surf the Net; Return steps A;
Step e 406: according to pattern 2 controlling run, that is: Δ PG=PL-Pb, photovoltaic generating system is not powered, and battery energy storage system discharges, from electrical network power purchase; Return steps A;
Step F:
Step F 01: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step F03, otherwise, go to step F02;
Step F 02: according to pattern 10 controlling run, that is: Δ PG+PPV=PL, photovoltaic generating system is powered, and battery cold standby use, from electrical network power purchase; Return steps A;
Step F 03: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step F02, otherwise, go to step F04;
Step F 04: whether detection meets PPV> PPV, MinIf meeting, going to step F05, otherwise, go to step F06;
Step F 05: according to pattern 11 controlling run, that is: Δ PG+PPV=PL+Pb, photovoltaic generating system is powered, and battery energy storage system charges, from electrical network power purchase; Return steps A;
Step F 06: according to pattern 12 controlling run, that is: Δ PG=PL+Pb, photovoltaic generating system is not powered, and battery energy storage system charges, from electrical network power purchase; Return steps A.
5. distributed photovoltaic energy storage micro-capacitance sensor control strategy according to claim 3, it is characterised in that, described from network operation control strategy be:
Step G: judge whether system possesses operational conditions; If possessed, go to step H, otherwise, terminate;
Step H: data gathering, calculating, data parameters comprises:
SOC: the state-of-charge of battery energy storage system work; Ub、Ib: battery energy storage system charging/discharging voltage, electric current;
SOCMin: the minimum SOC of battery energy storage system work; SOCMax: the maximum SOC of battery energy storage system work;
UB, Max: the stopping potential of battery energy storage system charge and discharge; IB, Min: the cut-off current of battery energy storage system charge and discharge;
tc_b、tdisc_b: the battery energy storage system continuous charge and discharge time;
tB, c_Max、tB, disc_Max: the maximum continuous charge and discharge time allowing the continuous charge and discharge of battery energy storage system;
PPV: the photovoltaic power generation system output power value in k moment;
PPV, Min: the minimum output power value that photovoltaic generating system can run;
Pb: the battery energy storage system output power value in k moment;
PL: the load power requirements in k moment;
ΔPPV_L: the P in k momentPV-PLAllow peak power difference;
ΔPG: the k moment needs the performance number that electrical network provides;
ΔPb: the k moment needs the performance number that battery energy storage system provides;
P′L: the specific load power demand value in k moment;
Step I: the state-of-charge (SOC state) of detection battery energy storage system; If SOC >=SOCMax, go to step J, if SOCMin<SOC<SOCMax, go to step K, if SOC is < SOCMin, go to step L;
Step J:
Step J01: whether detection meets PPV> PPV, MinIf meeting, going to step J02, otherwise, go to step J101-J107;
Step J02: whether detection meets PPV+Pb> PLIf meeting, going to step J03, otherwise, go to step J401-J406;
Step J03: whether detection meets PPV> PLIf meeting, going to step J301-J306, otherwise, go to step J201-J202;
Step J101: whether detection meets battery energy storage system electric discharge starting conditions, goes to step J103 if met, otherwise, go to step J102;
Step J102: send load and do not meet alarm; Return step G;
Step J103: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step J102, otherwise, go to step J104;
Step J104: whether detection meets Pb≥PLIf meeting, going to step J105, otherwise, go to step J106;
Step J105: according to pattern 21 controlling run, that is: Δ Pb=PL, photovoltaic generating system is not powered, and battery energy storage system discharges, and electrical network is from net; Return step G;
Step J106: whether detection battery energy storage system electric discharge can meet the demand of specific load, if can meet, goes to step J107, otherwise, go to step J102;
Step J107: according to pattern 22 controlling run, that is: Δ Pb=PL', photovoltaic generating system is not powered, and battery energy storage system electric discharge meets the demand of specific load, and electrical network is from net; Return step G;
Step J201: whether detection meets battery energy storage system electric discharge starting conditions, goes to step J202 if met, otherwise, go to step J203;
Step J202: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step J203, otherwise, go to step J204;
Step J203: whether detection light photovoltaic generating system can meet the demand of specific load, if can meet, goes to step J205, otherwise, go to step J206;
Step J204: according to pattern 23 controlling run, Δ Pb=PL-PPV, photovoltaic generating system is powered, and battery energy storage system discharges, and electrical network is from net; Return step G;
Step J205: according to pattern 24 controlling run, photovoltaic generating system is powered and is met the demand of specific load, battery energy storage system hot reserve, and electrical network is from net;
Step J206: send load and do not meet alarm; Return step G;
Step J301: whether detection meets PPV-PL> Δ PPV_LIf meeting, going to step J303, otherwise, go to step J302;
Step J302: according to pattern 25 controlling run, photovoltaic generating system is powered, battery energy storage system hot reserve, and electrical network is from net;
Step J303: according to pattern 26 controlling run, photovoltaic generating system part abandons light, battery energy storage system hot reserve, and electrical network is from net; Return step G;
Step J401: detection PPV+PbWhether meeting the demand of specific load, if met, going to step J403, otherwise, go to step J402;
Step J402: send load and do not meet alarm; Return step G;
Step J403: whether detection meets battery energy storage system electric discharge starting conditions, goes to step J404 if met, otherwise, go to step J405;
Step J404: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step J405, otherwise, go to step J406;
Step J405: whether detection light photovoltaic generating system is powered separately can meet the demand of specific load, if can meet, goes to step J407, otherwise, go to step J402;
Step J406: according to pattern 27 controlling run, Δ Pb=PL′-PPV, photovoltaic generating system is powered, and battery energy storage system discharges, and the two meets the demand of specific load jointly, and electrical network is from net; Return step G;
Step J407: according to pattern 24 controlling run, PL'=PPV, photovoltaic generating system is powered, and meets the demand of specific load, and electrical network is from net; Return step G;
Step K:
Step K 01: whether detection meets PPV> PPV, MinIf meeting, going to step K02, otherwise, go to step K401-K407;
Step K 02: whether detection meets PPV+Pb> PLIf meeting, going to step K03, otherwise, go to step K301-K307;
Step K 03: whether detection meets PPV> PLIf meeting, going to step K101-K106, otherwise, go to step K201-K206;
Step K 101: whether detection meets battery energy storage system charging starting conditions, if met, goes to step K102, otherwise, go to step K103;
Step K 102: Δ PL_PV=PPV-PL, whether detection meets battery energy storage system charging cut-off condition, if met, goes to step K103, otherwise, go to step K106;
Step K 103: whether detection meets PPV-PL> Δ PPV_LIf meeting, going to step K105, otherwise, go to step K104;
Step K 104: according to pattern 25 controlling run, that is: photovoltaic generating system is powered, battery energy storage system hot reserve, and electrical network is from net; Return step G;
Step K 105: according to pattern 26 controlling run, that is: photovoltaic generating system part abandons light, battery energy storage system hot reserve, and electrical network is from net; Return step G;
Step K 106: according to pattern 28 controlling run, that is: Δ Pb=PL-PPV, photovoltaic generating system is powered, and battery energy storage system charges, and electrical network is from net; Return step G;
Step K 201: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step K202, otherwise, go to step K203;
Step K 202: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step K203, otherwise, go to step K204;
Step K 203: whether detection light photovoltaic generating system is powered meets the demand of specific load, if met, goes to step K205, otherwise, go to step K206;
Step K 204: according to pattern 23 controlling run, that is: photovoltaic generating system is powered, battery energy storage system discharges, and electrical network is from net; Return step G;
Step K 205: according to pattern 27 controlling run, that is: adjust photovoltaic generating system so that it is output rating meets the demand of specific load, and electrical network is from net; Return step G;
Step K 206: send load and do not meet alarm; Return step G;
Step K 301: whether detection light photovoltaic generating system is powered and battery energy storage system discharges can meet the demand of specific load, if met, goes to step K302, otherwise, go to step K307;
Step K 302: whether detection meets battery energy storage system electric discharge starting conditions, if met, goes to step K303, otherwise, go to step K304;
Step K 303: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step K304, otherwise, go to step K305;
Step K 304: whether detection light photovoltaic generating system is powered can meet the demand of specific load, if met, goes to step K306, otherwise, go to step K307;
Step K 305: according to pattern 27 controlling run, that is: Δ Pb=PL′-PPV, photovoltaic generating system is powered, and battery energy storage system discharges, and the two meets the demand of specific load jointly, and electrical network is from net; Return step G;
Step K 306: according to pattern 28 controlling run, PPV=PL', adjustment photovoltaic generating system so that it is output rating meets the demand of specific load, the outer portion power of the demand of specific load is battery energy storage system charging, and electrical network is from net; Return step G;
Step K 307: send load and do not meet alarm; Return step G;
Step K 401: whether detection meets battery energy storage system electric discharge starting conditions, goes to step K402 if met, otherwise, go to step K407;
Step K 402: whether detection meets battery energy storage system electric discharge cut-off condition, if met, goes to step K407, otherwise, go to step K403;
Step K 403: whether detection meets Pb≥PL, as met, go to step K405, otherwise, go to step K404;
Step K 404: whether battery energy storage system is powered separately can meet the demand of specific load, if can meet, goes to step K406, otherwise, go to step K407;
Step K 405: according to pattern 21 controlling run, Δ Pb=PL, photovoltaic generating system is not powered, and battery energy storage system discharges, and electrical network is from net; Return step G;
Step K 406: according to pattern 22 controlling run, Δ Pb=PL', photovoltaic generating system is not powered, and battery energy storage system electric discharge meets the demand of specific load, and electrical network is from net;Return step G;
Step K 407: send load and do not meet alarm; Return step G;
Step L:
Step L01: whether detection meets PPV> PPV, MinIf meeting, going to step L02, otherwise, go to step L11;
Step L02: whether detection meets PPV> PLIf meeting, going to step L03, otherwise, go to step L05;
Step L03: whether detection meets battery energy storage system charging starting conditions, if met, goes to step L04, otherwise, go to step L08;
Step L04: Δ PL_PV=PPV-PL, whether detection meets battery energy storage system charging cut-off condition, if met, goes to step L08, otherwise, go to step L09;
Step L05: whether detection light photovoltaic generating system is powered can meet the demand of specific load, if met, goes to step L06, otherwise, go to step L08;
Step L06: whether detection meets battery energy storage system charge initiation condition, if met, goes to step L07, otherwise, go to step L08;
Step L07: whether detection meets battery energy storage system charging cut-off condition, if met, goes to step L11, otherwise, go to step L10;
Step L08: send load and do not meet alarm; Return step G;
Step L09: according to pattern 29 controlling run, Δ Pb=PPV-PL, photovoltaic generating system is powered, and battery energy storage system charges, and electrical network is from net; Return step G;
Step L10: according to mode 30 controlling run, Δ Pb=PPV-PL', photovoltaic generating system is powered and is met the demand of specific load, and battery energy storage system charges, and electrical network is from net; Return step G.
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