CN103928940A - Active power control device and control method for distributed photovoltaic power station - Google Patents
Active power control device and control method for distributed photovoltaic power station Download PDFInfo
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- CN103928940A CN103928940A CN201410125754.XA CN201410125754A CN103928940A CN 103928940 A CN103928940 A CN 103928940A CN 201410125754 A CN201410125754 A CN 201410125754A CN 103928940 A CN103928940 A CN 103928940A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The invention provides an active power control device and control method for a distributed photovoltaic power station. The control device comprises a communication management module, a command processing module, an AGC module, a data management module and an information displaying module. The data management module is in charge of storing all data information related to an active power control system and in charge of history base and real-time base management. The information displaying module is in charge of displaying the operation information of the active power control system. The AGC module carries out active power distribution on all inverters through the equal-margin distribution strategy according to the latest real-time information received at present, so that the active power of the current power station meets the requirement of power grid dispatching.
Description
Technical field
The invention belongs to photovoltaic plant control technology field, be specifically related to a kind of distributed photovoltaic power station active power rate control system.
Background technology
According to < < photovoltaic plant access electric power network technique regulation > > requirement, photovoltaic plant should have active power regulation ability, and can control its active power output according to dispatching of power netwoks departmental instruction.In traditional power industry, real power control is very ripe, but in emerging photovoltaic field, particularly distributed photovoltaic power station still faces a lot of problems.Due to the characteristics such as randomness, intermittence and periodicity of solar energy resources and the region in distributed photovoltaic power station dispersiveness, cause the real power control of distributed photovoltaic to want complicated difficulty a lot.At present, the real power control in domestic a lot of distributed photovoltaics power station is by manual adjustment, by the mode of start and stop inverter.Manually operated shortcoming is also a lot, such as the response time is long, power division is unreasonable, adjusting error rate is large, cost of labor is high, the mode of start and stop inverter easily realizes but unreasonable distribution, can not make full use of the generating capacity of all solar panels, bring significant threat also to the safe and reliable operation of electrical network simultaneously.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of distributed photovoltaic power station active power control system, there is the distribution of work to distribute according to the regulating power of separate unit photovoltaic DC-to-AC converter (separate unit regulates space to account for the ratio in total adjusting space), image data is carried out to rolling average, filter the value that fluctuation is very large.
To achieve these goals, the application takes following technical scheme:
An intelligent distributed photovoltaic plant active power control device, comprises communication management module, command processing module, AGC control module, data management module, information display module; It is characterized in that:
Data management module is connected with communication management module, and described communication management module is also passed through communication connection with the interior complex control system in station, grid dispatching center, photovoltaic DC-to-AC converter;
Data management module is connected to respectively command processing module, AGC control module, information display module, and described AGC control module is also connected with command processing module.
Communication management module is responsible for carrying out with the interior complex control system in station, grid dispatching center, photovoltaic DC-to-AC converter etc. the transmitting-receiving of real time information; The remote regulating that command processing module is responsible for communication management module to receive, remote control command are converted into the information that AGC control module can be identified, and the instruction transformation that AGC control system is issued is the form that different photovoltaic DC-to-AC converters can be identified; AGC control module, according to the current up-to-date real time information receiving, is carried out active power distribution by corresponding strategy to full station photovoltaic DC-to-AC converter, makes the active power in current power station meet the requirement of dispatching of power netwoks; Data management module is responsible for storing all data messages that meritorious power control system relates to, and comprises history library and library management in real time; Information display module is responsible for showing the relevant information of active power control system operation, comprises the input of system/exit, this locality/distant place, target power curve, realtime power curve, increases locking, subtracts locking etc.
Described communication management module is responsible for complex control system, grid dispatching center, the remote measurement of photovoltaic DC-to-AC converter, remote signalling information in acquisition station, the running status, active power, reactive power, the real power control sign that comprise photovoltaic DC-to-AC converter, the active power of booster stations high-voltage side bus, reactive power and information of voltage.
Described data management module is to the active power of gathered photovoltaic DC-to-AC converter, reactive power, voltage, the related data of the reactive power of the active power of booster stations high-voltage side bus, reactive power and voltage and static passive compensation device, the environment detector that forwards by the interior work station of standing etc. is carried out rolling average, then inputs AGC control module.
Remote regulating, remote control command that described command processing module is responsible for the communication module to receive scheduling station are converted into the information that AGC control module can be identified, and the remote regulating that AGC control module is issued, remote control command are converted to the form that different photovoltaic DC-to-AC converters can be identified.
Described AGC control module has free power generation mode, distant place curve model, distant place pattern, local curve model, this locality five kinds of control models of pattern of setting up an office of setting up an office.
Described free power generation mode is exactly that the meritorious set point of each inverter is made as to the meritorious upper limit, freely generates electricity according to current natural environment in whole power station; Distant place curve model is exactly that regulate each inverter meritorious exerted oneself the real curve of sending out trace scheduling meritorious and issuing in power station is exerted oneself; The distant place pattern of setting up an office is exactly that the value of setting up an office issuing according to current scheduling regulates exerting oneself of each inverter; Local curve model is that the Plan Curve value of setting according to this locality regulates the meritorious of current power station to exert oneself; This locality pattern of setting up an office is exactly to regulate exerting oneself of each inverter according to the value of setting up an office of this locality.
Disclosed herein as well is a kind of distributed photovoltaic power station AGC control method, it is characterized in that, said method comprising the steps of:
(1) intelligent distributed photovoltaic plant active power control device gathers remote measurement, remote signalling information, the running status, active power, reactive power, the real power control sign that comprise photovoltaic DC-to-AC converter, the reactive power of the active power of booster stations high-voltage side bus, reactive power and voltage and static passive compensation device, and the meritorious general objective P that exerts oneself of the full station photovoltaic DC-to-AC converter of dispatching down distributing
general objective;
(2) computing reference index the meritorious desired value of distributing photovoltaic DC-to-AC converter, described reference index comprises that meritorious the exerting oneself of i platform photovoltaic DC-to-AC converter raise space P
i raises space, i platform photovoltaic DC-to-AC converter meritorious exerting oneself lower space P
i lowers space, photovoltaic DC-to-AC converter the meritorious total space P of rise that exerts oneself that stands entirely
total space of raising, photovoltaic DC-to-AC converter the meritorious total space P of downward that exerts oneself that stands entirely
total space of lowering, i platform photovoltaic DC-to-AC converter rise ability R
i raises ability, i platform photovoltaic DC-to-AC converter downward ability R
i lowers ability, the active power total losses P that stands entirely
total losseswith the meritorious gross spread P that exerts oneself of full station photovoltaic DC-to-AC converter
gross spread, wherein, i is 1 to n integer, n is the quantity of full station photovoltaic DC-to-AC converter;
Meritorious the exerting oneself of described i platform photovoltaic DC-to-AC converter raised space P
i raises space=Max(P
i is theoretical, P
i is real-time)-P
i in real time, meritorious the exerting oneself of i platform photovoltaic DC-to-AC converter lowered space P
i lowers space=Max(1/2*Max(P
i is theoretical, P
i is real time), P
i regulates lower limit);
Wherein, P
i is theoreticalbe that the theory of i platform photovoltaic DC-to-AC converter under current environment exerted oneself, P
i is real-timebe meritorious the exerting oneself of current reality of i platform photovoltaic DC-to-AC converter, P
i regulates lower limitit is the meritorious adjusting lower limit of exerting oneself of i platform photovoltaic DC-to-AC converter;
Meritorious total space P of rise that exerts oneself of full station photovoltaic DC-to-AC converter
total space of raising=∑ P
i raises space;
Meritorious total space P of downward that exerts oneself of full station photovoltaic DC-to-AC converter
total space of lowering=∑ P
i lowers space;
The meritorious rise ability R that exerts oneself of i platform photovoltaic DC-to-AC converter
i raises ability=P
i raises space/ P
total space of raising;
The meritorious downward ability R that exerts oneself of i platform photovoltaic DC-to-AC converter
i lowers ability=P
i lowers space/ P
total space of lowering;
Full station active power total losses P
total losses=∑ P
i is real-time-P
full station outlet, wherein, P
full station outletfor the real-time active power of full station outlet;
The meritorious gross spread of exerting oneself of full station photovoltaic DC-to-AC converter
wherein, P
general objectivefor the meritorious general objective of exerting oneself of full station photovoltaic DC-to-AC converter of dispatching down distributing,
for P
total lossesmoving average;
(3) if fabs is (P
gross spread) <P
regulate threshold values, P so
i target=P
i is real-time, do not regulate, wherein P
i targetbe the meritorious desired value of exerting oneself of i platform photovoltaic DC-to-AC converter, P
regulate threshold valuesfor the full station force regulating valve value of gaining merit, it is system definite value parameter, and its value is determined by scheduling station;
(4) if 0<P
gross spread<P
total space of raising, the meritorious desired value P that exerts oneself of i platform photovoltaic DC-to-AC converter so
i target=P
i in real time+ P
gross spread* R
i raises ability;
(5) if 0<P
total space of raising<P
gross spread<P
total space of raising+ P
start threshold values, the meritorious desired value P that exerts oneself of i platform photovoltaic DC-to-AC converter so
i target=P
i is real-time+ P
total space of raising* R
i raises ability, P wherein
start threshold valuesfor the meritorious start threshold values regulating in full station, general value is the installed capacity of an inverter.；
(6) if P
gross spread>P
total space of raising+ P
start threshold values, from the photovoltaic DC-to-AC converter of standby, select so the adjusting of gaining merit of the longest photovoltaic DC-to-AC converter of stand-by period, the sign of being started shooting is set to true, i.e. the start of i platform photovoltaic DC-to-AC converter sign Flag
i start=1, the meritorious desired value of exerting oneself of this i platform photovoltaic DC-to-AC converter is P
i target=P
i is real-time+ P
always raise space* R
i raises ability;
(7) if P
gross spread<0 and fabs (P
gross spread) <P
total space of lowering, the meritorious desired value P that exerts oneself of i platform photovoltaic DC-to-AC converter so
i target=P
i is real-time+ P
gross spread* R
i lowers ability;
(8) if P
gross spread<0 and P
total space of lowering<fabs (P
gross spread) <P
total space of lowering+ P
shut down threshold values, the meritorious desired value P that exerts oneself of i platform photovoltaic DC-to-AC converter so
i target=P
i is real-time+ P
total space of lowering* R
i lowers ability, wherein, P
shut down threshold valuesfor the meritorious shutdown threshold values regulating in full station;
(9) if P
gross spread<0 and fabs (P
gross spread) >P
total space of lowering+ P
shut down threshold values, from grid-connected photovoltaic DC-to-AC converter, select so grid-connected the longest photovoltaic DC-to-AC converter of time, and shut down sign be set to true, i.e. the shutdown of i platform photovoltaic DC-to-AC converter sign Flag
i shuts downthe meritorious desired value P that exerts oneself of=1 i platform photovoltaic DC-to-AC converter
i target=P
i is real-time+ P
under total adjust space* Rate
i lowers.
Compared with prior art, beneficial effect of the present invention is:
1. there is the distribution of work to distribute according to the regulating power of separate unit photovoltaic DC-to-AC converter (separate unit regulates space to account for the ratio in total adjusting space), and added the selected theoretical power (horse-power) as inverter every day of template processing machine;
2. add free power generation mode, after AGC system just drops into and before exiting, adjusting pattern is adjusted to free power generation mode, otherwise inverter keeps the last set point regulating, and affects energy output.
3. set many places and regulate threshold values, can avoid in the reasonable scope repeatedly regulate and prevent equipment frequent switching (start and stop) at short notice, extension device useful life;
4. pair real time data is carried out rolling average, filters the value that fluctuation is very large, makes algorithm more accurate.
Being switched in the distance local moment is made as local desired value by distant place desired value, in the time of can eliminating switching
The instantaneous shake of power.
Accompanying drawing explanation
Fig. 1 the application distributed photovoltaic power station active power control device structure chart;
The disclosed distributed photovoltaic of Fig. 2 the application power station AGC control method flow chart.
Wherein, 1 is active power control device, and 2 is data management module, and 3 is communication management module, and 4 is command processing module, and 5 is AGC control module, and 6 is information display module, and 7 is complex control system in station, and 8 is full station photovoltaic DC-to-AC converter, and 9 is grid dispatching center.
Embodiment
Below in conjunction with accompanying drawing, this patent is described in further detail.
As shown in Figure 1, provide a kind of distributed photovoltaic power station active power control device 1, described control device 1 comprises communication management module 3, command processing module 4, AGC control module 5, data management module 2, information display module 6.Communication management module 3 is responsible for carrying out with the interior complex control system 7 in station, grid dispatching center 9, photovoltaic DC-to-AC converter 8 etc. the transmitting-receiving of real time information; Remote regulating, remote control command that command processing module 4 is responsible for communication management module 3 to receive are converted into the information that AGC control module 5 can be identified, and the instruction transformation that AGC control module 5 is issued is the form that different photovoltaic DC-to-AC converters 8 can be identified; AGC control module 5, according to the current up-to-date information receiving, is carried out active power distribution by corresponding strategy to full station photovoltaic DC-to-AC converter, makes the active power in current power station meet the requirement of dispatching of power netwoks; Data management module is responsible for all data messages that storage system relates to and is comprised history library and library management in real time; Information display module is responsible for the relevant information of display systems operation.
Described communication management module 3 is responsible for gathering remote measurement, the remote signalling information of institute's attached device, the running status, active power, reactive power, the real power control sign that comprise photovoltaic DC-to-AC converter, the reactive power of the active power of booster stations high-voltage side bus, reactive power and voltage and static passive compensation device, by the information such as related data of the environment detector that in station, work station forwards.
Active power, reactive power, the voltage of 2 pairs of photovoltaic DC-to-AC converters that gather of described data management module, the related data of the reactive power of the active power of booster stations high-voltage side bus, reactive power and voltage and static passive compensation device, the environment detector that forwards by the interior work station of standing etc. is carried out rolling average, then participates in the calculating of AGC control module 5.
Remote regulating, remote control command that described command processing module 4 is responsible for the communication module to receive scheduling station are converted into the information that AGC control module can be identified, and the remote regulating that AGC control module 5 is issued, remote control command are converted to the form that different photovoltaic DC-to-AC converters can be identified; AGC control module 5 can directly be got and control required remote measurement, remote signalling data from data management module.
Be illustrated in figure 2 the disclosed distributed photovoltaic of the application power station AGC control method schematic flow sheet, described control method comprises the following steps:
Step 1: intelligent distributed photovoltaic plant active power control device gathers remote measurement, remote signalling information, the running status, active power, reactive power, the real power control sign that comprise photovoltaic DC-to-AC converter, the reactive power of the active power of booster stations high-voltage side bus, reactive power and voltage and static passive compensation device, and the meritorious general objective P that exerts oneself of the full station photovoltaic DC-to-AC converter of dispatching down distributing
general objective;
Step 2: described AGC control module computing reference index the meritorious desired value of distributing photovoltaic DC-to-AC converter, described reference index comprises the meritorious upper limit P that exerts oneself of i platform photovoltaic DC-to-AC converter
i raises space, i platform photovoltaic DC-to-AC converter meritorious exerting oneself lower space P
i lowers space, photovoltaic DC-to-AC converter the meritorious total space P of rise that exerts oneself that stands entirely
total space of raising, photovoltaic DC-to-AC converter the meritorious total space P of downward that exerts oneself that stands entirely
total space of lowering, i platform photovoltaic DC-to-AC converter rise ability R
i raises ability, i platform photovoltaic DC-to-AC converter downward ability R
i lowers ability, the active power total losses P that stands entirely
total losseswith the meritorious gross spread P that exerts oneself of full station photovoltaic DC-to-AC converter
gross spread.
Meritorious the exerting oneself of described i platform photovoltaic DC-to-AC converter raised space P
i raises space=Max(P
i is theoretical, P
i is real-time)-P
i in real time, meritorious the exerting oneself of i platform photovoltaic DC-to-AC converter lowered space P
i lowers space=Max(1/2*Max(P
i is theoretical, P
i is real time), P
i regulates lower limit);
Wherein, P
i is theoreticalbe that the theory of i platform photovoltaic DC-to-AC converter under current environment exerted oneself, according to exerting oneself as a reference of selected template processing machine, P
i is real-timebe meritorious the exerting oneself of current reality of i platform photovoltaic DC-to-AC converter, P
i regulates lower limitit is the meritorious adjusting lower limit of exerting oneself of i platform photovoltaic DC-to-AC converter;
Meritorious total space P of rise that exerts oneself of full station photovoltaic DC-to-AC converter
total space of raising=∑ P
i raises space;
Meritorious total space P of downward that exerts oneself of full station photovoltaic DC-to-AC converter
total space of lowering=∑ P
i lowers space;
The meritorious rise ability R that exerts oneself of i platform photovoltaic DC-to-AC converter
i raises ability=P
i raises space/ P
total space of raising;
The meritorious downward ability R that exerts oneself of i platform photovoltaic DC-to-AC converter
i lowers ability=P
i lowers space/ P
total space of lowering;
Full station active power total losses P
total losses=∑ P
i is real-time-P
full station outlet, wherein, P
full stationfor the real-time active power of full station outlet;
The meritorious gross spread of exerting oneself of full station photovoltaic DC-to-AC converter
wherein, P
general objectivefor the meritorious general objective of exerting oneself of full station photovoltaic DC-to-AC converter of dispatching down distributing,
for P
total lossesmoving average.
Step 3: if fabs is (P
gross spread) <P
regulate threshold values, P so
i target=P
i is real-time, do not regulate, wherein P
i order markbe the meritorious desired value of exerting oneself of i platform photovoltaic DC-to-AC converter, P
regulate threshold valuesfor the complete station force regulating valve value of gaining merit, it is system definite value parameter, and its value is definite according to the requirement of scheduling station;
Step 4: if 0<P
gross spread<P
total space of raising, P so
i target=P
i is real-time+ P
gross spread* R
i raises ability;
Step 5: if 0<P
total space of raising<P
gross spread<P
total space of raising+ P
start threshold values, P so
i target=P
i is real-time+ P
total space of raising* R
i rise ability, P wherein
start threshold valuesfor the meritorious start threshold values regulating in full station, general value is the installed capacity of an inverter;
Step 6: if P
gross spread>P
total space of raising+ P
start threshold values, from the photovoltaic DC-to-AC converter of standby, select so the longest photovoltaic DC-to-AC converter of stand-by period, establish its start and be designated very, the start of i platform photovoltaic DC-to-AC converter sign Flag
i opens machine=1, there is P
i target=P
i is real-time+ P
total space of raising* R
i raises ability;
Step 7: if P
gross spread<0 and fabs (P
gross spread) <P
total space of lowering, P so
i target=P
i is real-time+ P
gross spread* R
i lowers energypower;
Step 8: if P
gross spread<0 and P
total space of lowering<fabs (P
gross spread) <P
total space of lowering+ P
shut down threshold values, P so
i target=P
i in real time+ P
total space of lowering* R
i lowers ability, wherein, P
shut down threshold valuesfor the meritorious shutdown threshold values regulating in full station.
Step 9: if P
gross spread<0 and fabs (P
gross spread) >P
total space of lowering+ P
shut down threshold values, from grid-connected photovoltaic DC-to-AC converter, select so grid-connected the longest photovoltaic DC-to-AC converter of time, and establish its shutdown and be designated very, the shutdown of i platform photovoltaic DC-to-AC converter sign Flag
i shuts down=1, there is P
i target=P
i is real-time+ P
total space of lowering* R
i lowers ability.
Finally it should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although the present invention is had been described in detail with reference to above-described embodiment, those of ordinary skill in the field are to be understood that: still can modify or be equal to replacement the specific embodiment of the present invention, and do not depart from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of claim scope of the present invention.
Claims (5)
1. a distributed photovoltaic power station active power control device, comprises communication management module, command processing module, AGC control module, data management module, information display module; It is characterized in that:
Data management module is connected with communication management module, and described communication management module is also passed through communication connection with the interior complex control system in station, grid dispatching center, photovoltaic DC-to-AC converter;
Data management module is connected to respectively command processing module, AGC control module, information display module, and described AGC control module is also connected with command processing module.
2. active power control device according to claim 1, is characterized in that:
Communication management module is responsible for carrying out with the interior complex control system in station, grid dispatching center, photovoltaic DC-to-AC converter etc. the transmitting-receiving of real time information; The remote regulating that command processing module is responsible for communication management module to receive, remote control command are converted into the information that AGC control module can be identified, and the instruction transformation that AGC control module is issued is the form that different photovoltaic DC-to-AC converters can be identified; AGC control module, according to the current up-to-date real time information receiving, is carried out active power distribution to whole audience photovoltaic DC-to-AC converter, makes the active power in current power station meet the requirement of dispatching of power netwoks; Data management module is responsible for storing all data messages that meritorious power control system relates to, and comprises history library and library management in real time; Information display module is responsible for showing the information of active power control system operation, comprises the input of system/exit, this locality/distant place, target power curve, realtime power curve, increases locking, subtracts locking etc.
3. active power control device according to claim 2, is characterized in that:
Described data management module is to the active power of gathered photovoltaic DC-to-AC converter, reactive power, voltage, the reactive power of the active power of booster stations high-voltage side bus, reactive power and voltage and static passive compensation device is carried out rolling average, then input value AGC control module.
4. according to the active power control system described in claim 2 or 3, it is characterized in that:
Described AGC control module has free power generation mode, distant place curve model, distant place pattern, local curve model, this locality five kinds of control models of pattern of setting up an office of setting up an office.
5. a distributed photovoltaic power station active power control method, is characterized in that, said method comprising the steps of:
(1) active power control device in distributed photovoltaic power station gathers remote measurement, remote signalling information, the running status, active power, reactive power, the real power control sign that comprise photovoltaic DC-to-AC converter, the reactive power of the active power of booster stations high-voltage side bus, reactive power, voltage, static passive compensation device, and the meritorious general objective P that exerts oneself of the whole audience photovoltaic DC-to-AC converter of dispatching down distributing
general objective;
(2) computing reference index the meritorious desired value of distributing photovoltaic DC-to-AC converter, described reference index comprises that meritorious the exerting oneself of i platform photovoltaic DC-to-AC converter raise space P
i raises space, i platform photovoltaic DC-to-AC converter meritorious exerting oneself lower space P
i lowers space, whole audience photovoltaic DC-to-AC converter meritorious total space P of rise that exerts oneself
total space of raising, whole audience photovoltaic DC-to-AC converter meritorious total space P of downward that exerts oneself
total space of lowering, i platform photovoltaic DC-to-AC converter rise ability R
i raises ratio, i platform photovoltaic DC-to-AC converter downward ability R
i lowers ratio, whole audience active power total losses P
total losseswith the meritorious gross spread P that exerts oneself of whole audience photovoltaic DC-to-AC converter
gross spread, wherein, i is 1 to n integer, n is the quantity of full station photovoltaic DC-to-AC converter;
Meritorious the exerting oneself of described i platform photovoltaic DC-to-AC converter raised space P
i raises space=Max(P
i is theoretical, P
i is real-time)-P
i in real time, meritorious the exerting oneself of i platform photovoltaic DC-to-AC converter lowered space P
i lowers space=Max(1/2*Max(P
i is theoretical, P
i is real time), P
i regulates lower limit);
Wherein, P
i is theoreticalbe that the theory of i platform photovoltaic DC-to-AC converter under current environment exerted oneself, P
i is real-timebe meritorious the exerting oneself of current reality of i platform photovoltaic DC-to-AC converter, P
i regulates lower limitit is the meritorious adjusting lower limit of exerting oneself of i platform photovoltaic DC-to-AC converter;
Meritorious total space P of rise that exerts oneself of full station photovoltaic DC-to-AC converter
total space of raising=∑ P
i raises space;
Meritorious total space P of downward that exerts oneself of full station photovoltaic DC-to-AC converter
total space of lowering=∑ P
i lowers space;
The meritorious rise ability R that exerts oneself of i platform photovoltaic DC-to-AC converter
i raises ability=P
i raises space/ P
total space of raising;
The meritorious downward ability R that exerts oneself of i platform photovoltaic DC-to-AC converter
i lowers ability=P
i lowers space/ P
total space of lowering;
Full station active power total losses P
total losses=∑ P
i is real-time-P
full station outlet, wherein, P
full station outletfor the real-time active power of full station outlet;
The meritorious gross spread of exerting oneself of full station photovoltaic DC-to-AC converter
wherein, P
general objectivefor the meritorious general objective of exerting oneself of full station photovoltaic DC-to-AC converter of dispatching down distributing,
for P
total lossesmoving average;
(3) if fabs is (P
gross spread) <P
regulate threshold values, P so
i target=P
i is real-time, do not carry out active power regulation, wherein P
i targetbe the meritorious desired value of exerting oneself of i platform photovoltaic DC-to-AC converter, P
regulate threshold valuesfor the full station force regulating valve value of gaining merit, it is system definite value parameter, and value is determined by scheduling station;
(4) if 0<P
gross spread<P
total space of raising, the meritorious desired value P that exerts oneself of i platform photovoltaic DC-to-AC converter so
i target=P
i in real time+ P
gross spread* R
i raises ability;
(5) if 0<P
total space of raising<P
gross spread<P
total space of raising+ P
start threshold values, the meritorious desired value P that exerts oneself of i platform photovoltaic DC-to-AC converter so
i target=P
i is real-time+ P
total space of raising* R
i raises ability, P wherein
start threshold valuesfor the meritorious start threshold values regulating in full station, value is the installed capacity of an inverter;
(6) if P
gross spread>P
total space of raising+ P
start threshold values, from the queue of standby inverter, select so the adjusting of gaining merit of the longest photovoltaic DC-to-AC converter of stand-by period, the sign of being started shooting is set to true, i.e. the start of i platform photovoltaic DC-to-AC converter sign Flag
i start=1, the meritorious desired value of exerting oneself of this i platform photovoltaic DC-to-AC converter is P
i target=P
i is real-time+ P
on total adjust space* R
i raises ability;
(7) if P
gross spread<0 and fabs (P
gross spread) <P
total space of lowering, the meritorious desired value P that exerts oneself of i platform photovoltaic DC-to-AC converter so
i target=P
i is real-time+ P
gross spread* R
i lowers ability;
(8) if P
gross spread<0 and P
total space of lowering<fabs (P
gross spread) <P
total space of lowering+ P
shut down threshold values, the meritorious desired value P that exerts oneself of i platform photovoltaic DC-to-AC converter so
i target=P
i is real-time+ P
total space of lowering* Rate
i lowers, wherein, P
shut down threshold valuesfor the meritorious shutdown threshold values regulating in full station;
(9) if P
gross spread<0 and fabs (P
gross spread) >P
total space of lowering+ P
shut down threshold values, from grid-connected photovoltaic DC-to-AC converter, select so grid-connected the longest photovoltaic DC-to-AC converter of time, and shut down sign be set to true, i.e. the shutdown of i platform photovoltaic DC-to-AC converter sign Flag
i shuts downthe meritorious desired value P that exerts oneself of=1 i platform photovoltaic DC-to-AC converter
i target=P
i is real-time+ P
under total adjust space* R
i lowers ability.
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