CN102355005B - Distributed photovoltaic power generation regional integrated control method - Google Patents
Distributed photovoltaic power generation regional integrated control method Download PDFInfo
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Abstract
The invention discloses a distributed photovoltaic power generation regional integrated control method. An adopted integrated control system comprises a photovoltaic cell array, a distributed inverter control system, a sensor network, an intra-region electric control system, a regional integrated control center system and a power dispatching control center, wherein the photovoltaic cell array converts photovoltaic energy into direct current electric energy; the distributed inverter control system is used for control over the photovoltaic cell array and direct current inversion; the sensor network and the intra-region electric control system are used for monitoring and controlling each piece of electric equipment in a region and ensuring the safety of electric facilities; the regional integrated control center system manages power generation running and centralized grid connection in the region; and the power dispatching control center is used for regional status monitoring and power dispatching. By the method, low-power distributed photovoltaic power generation devices in a certain region can be connected with one another for centralized grid connection management and accept the dispatching of the power dispatching control center to realize a flexible, high-efficiency and reliable utilization form for photovoltaic power, the remote parameter measurement and control of a photovoltaic power generation system and the power dispatching.
Description
Technical field
The present invention relates to distributed photovoltaic power generation grid-connected system and Detection & Controling field thereof, especially relate to the grid-connected control method of distributed photovoltaic power generation regional ensemble and distributed power scheduling strategy.
Background technology
Along with expanding economy, energy shortage is the problem that whole world every country all faces.Be faced with exhausted danger as most important available fossil energy material as coal, oil, natural gas etc., it is more and more serious that the energy shortage problem is just becoming, and have influence on people's living standard simultaneously.On the other hand, the problems such as the environmental pollution that fossil energy brings, climate warming can't have been ignored, have affected development and the popularization of sustainable development, energy-conserving and environment-protective theory, just more and more receive people's concern.In numerous novel energies, solar energy have cleanliness without any pollution, safe and reliable, restriction less, the advantages such as inexhaustible not to the utmost, sustainable use used, thereby there is incomparable advantage.Distributed power generation can the electric power on-site elimination, saves power transmission and transformation investment and operating cost, reduces the line loss of concentrating transmission of electricity; And complement one another with large mains supply, reduce net capacity, improve electrical network peak valley performance, improve power supply reliability.
But photovoltaic generation itself has randomness and the intermittent characteristics that are different from normal power supplies, it is incorporated into the power networks the quality of power supply of electrical network and safe and stable operation is formed to certain threat.On the one hand, the trend that the injection of photovoltaic power has changed partial electric grid distributes, and quality of voltage and the stability of partial electric grid is had a significant impact, and has limited mode and the scale of photovoltaic generation connecting system.On the other hand, the motive power controllability of photovoltaic generation is not strong, whether in generating state and the limited size that goes out merit in the performance of weather conditions and photovoltaic system.From the angle of electrical network, the photovoltaic generation be incorporated into the power networks is equivalent to a disturbing source with randomness, may the reliability service of electrical network be impacted at any time.Therefore, above-mentioned photovoltaic generating system is because operation of power networks and the safety problem that the quality of power supply, unsteadiness, island effect etc. cause will greatly limit China large-scale promotion and the application of distributed photovoltaic power generation system on a small scale.
The distributed photovoltaic power generation of China does not also enter the popularization stage, and current demonstrative project engineering still be take the construction of jumbo photovoltaic plant as main.Except large photovoltaic plant, " golden sun demonstration project " has advantages of distributed photovoltaic power generation, but, due to technical reason, its electric power mainly be take on-site elimination as main, its control centre can only monitor distributed power station parameter, uncontrollablely more can't carry out power scheduling.Take in Germany, the Japan solar power generation developed country that is representative, only solitary building of generally take is grid-connected as the distributed photovoltaic power generation unit, has obtained application preferably.But, in specifically practicing process, there are this many defects in existing this distributed photovoltaic power generation net mode:
1) each distributed photovoltaic power generation unit independently becomes a system, and its unit scale is less, and quantity is too many, and the cost height is uneconomical.
2) distributed photovoltaic unit small scale, by different owners are had, the Power quality management inconvenience, also be not easy to the electrical network periodic maintenance, has potential safety hazard.
3) due to small scale, quantity is many, can't carry out the electric power United Dispatching, for the power scheduling that has electrical network now carrys out great burden, and has the danger of islet operation.
4) the independent dispersion, the electrical network access point is numerous, and intelligent instrument is installed complicated, and the parameter detecting cost is high, for the popularization of intelligent grid brings burden.
In sum, existing distributed photovoltaic power generation net mode and control method can not meet the demand of power scheduling, and uneconomical practicality, do not possess the technical foundation of large-scale promotion.
Summary of the invention
In order to overcome existing distributed photovoltaic power generation net mode and control method less stable, can not concentrate parallel control, deficiency that maintainability is poor, meet the demand of power scheduling, the invention provides and a kind ofly improve the distributed photovoltaic power generation stability of a system, concentrate grid-connected, centralized monitor scheduling, strengthen the distributed photovoltaic power generation regional integrated control method of maintainability.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of distributed photovoltaic power generation regional integrated control method, the integrated control system adopted comprises photovoltaic battery array, distributed inverse control system, sensing network, electric control system in zone, District integrated control centring system and power scheduling control centre, described photovoltaic battery array is connected with distributed inverse control system, distributed inverse control system is connected with the District integrated control centring system, described sensing network respectively with photovoltaic battery array, distributed inverse control system, the District integrated control centring system connects, in described zone electric control system respectively with distributed inverse control system, the District integrated control centring system connects, described District integrated control centring system is connected with utility grid, the District integrated control centring system is connected with power scheduling control centre,
Distributed photovoltaic power generation regional integrated control method is concentrated grid-connectedly by small-power, distributed photovoltaic array are interconnected, and accepts the control of local power scheduling control centre, and detailed process is:
The direct current energy that described photovoltaic battery array transforms accesses respectively in each self-corresponding distributed inverse control system after confluxing, the industrial frequency AC electric energy that distributed inversion system is 380 volts by the direct current energy inversion, it is grid-connected that 380 volts of industrial frequency AC electric energy of distributed inversion system output concentrate on same node after by the parallel connection of District integrated control centring system.
As preferred a kind of scheme: described District integrated control centring system is according to state model and the regional internal burden characteristic coupling of distributed photovoltaic power in zone, and in conjunction with the signal parameter adjustment of sensing network and control the operating state of each distributed photovoltaic power.
Further, described District integrated control centring system is communicated by letter with power scheduling control centre, reports photovoltaic generation operating state and environmental parameter in zone, receives the dispatching command of power-management centre simultaneously, carries out it and stops, adjusting, start generating operation.
Further again, described sensing network is comprised of sensor network and data fusion module, comprise sets of temperature sensors, light radiation degree transducer group, Hall current sensor group, Hall voltage transducer group, frequency sensor group and thermal imagery leakage current sensor group, described sets of temperature sensors, light radiation degree transducer group layout and described photovoltaic battery array scene, described Hall current sensor group, Hall voltage transducer group, frequency sensor group and thermal imagery leakage current sensor group are arranged in described distributed inversion control; Described data fusion module gathers each sensor die blocks of data and calculates power, power factor (PF), meritorious and reactive power, temperature by Ampere's law, Wien displacement blackbody radiation law, and adopts quantitative flexible strategy normalization algorithm data to be processed and sent promptly for the scene order.
Further, described quantitative flexible strategy normalizing algorithm is weighted power varying offset amount, frequency change side-play amount, change in voltage side-play amount, curent change side-play amount, variations in temperature side-play amount, then be normalized to [0 1] interval urgency level, when the normalization urgency level is greater than set threshold vector, be corresponding unsafe condition, corresponding promptly for the scene order by sending.
Further, described distributed inversion system adopts adaptive neuro-fuzzy inference (adaptive neuro-fuzzyinference, ANFI) algorithm is according to the relation property of the working environment parameters such as I-V, P-V characteristic curve and the temperature of photovoltaic cell, solar irradiance, maximum power point (Maximum PowerPoint to photovoltaic battery array, MPP) followed the tracks of, and regulate in real time the optimum operating voltage of controlling photovoltaic battery array by two BOOST-BUCK control circuits, its power output is maximized all the time.
Further, the fuzzy inference system of described adaptive neuro-fuzzy inference algorithm based on adaptive neural network, adopt five layers of ANFI neural network structure of Sugeno fuzzy model, form input vector u (V by parameters such as current voltage, electric current, power, temperature, solar irradiances, I, P, T, R), the optimum operating voltage that output f (u) is maximum power point.
Technical conceive of the present invention is: the control method of multilayer distributed microgrid, the communication technology and power scheduling strategy are incorporated in the solar photovoltaic power generation grid-connecting system, utilize network communications technology in addition interconnected and concentrate grid-connected and scheduling controlling the small-power in certain area coverage, distribution type photovoltaic power generation device, can be combined the high efficient and flexible electric power system that forms an integral body with the existing power supply system of concentrating, improve stability, reliability and the power quality of whole electric power system.
By the major parts such as electric control system, District integrated control centring system, power scheduling control centre in photovoltaic battery array, distributed inverse control system, sensing network, zone, formed, adopt the control method of optimizing, as shown in Figure 3, concentrate grid-connectedly by the small-power in certain area coverage, distribution type photovoltaic power generation device are interconnected, and can accept the scheduling controlling of local electric power.Wherein photovoltaic battery array is solar energy converting electrical energy device, suits measures to local conditions to be arranged in the many solitary buildings top in zone, and the direct current energy that photovoltaic battery array transforms accesses respectively in each self-corresponding distributed inverse control system after confluxing.The industrial frequency AC electric energy that distributed inversion system is 380 volts by the direct current energy inversion on the one hand, on the other hand the maximum power point of photovoltaic battery array is followed the tracks of to control, regulate in real time the operating voltage of photovoltaic battery array, its power output is maximized all the time.It is grid-connected that 380 volts of industrial frequency AC electric energy of distributed inversion system output concentrate on same node after by the parallel connection of District integrated control centring system.In addition, the District integrated control center is according to the state model of distributed photovoltaic power generation power supply and the signal parameter of sensing network in zone, adjust and control the operating state of each distributed photovoltaic power generation power supply, and adopt peculiar algorithm to send the emergency control order according to partial parameters.In addition, Regional Control Center is communicated by letter with power-management centre, reports photovoltaic generation operating state and environmental parameter in zone, receives the dispatching command of power-management centre simultaneously, carries out the operation that it stops, adjusting, start generating.On each equipment, for detection of environmental parameter and electric parameter, and parameter signal is sent to the District integrated control centring system, for its decision-making in the various transducers layouts of sensing network and regional network.Working environment parameter and the operating state of centralized control center, receiving area, local power-management centre system, and according to actual civil power power consumption situation, the distributed photovoltaic power generation system of regional ensemble is carried out to control and scheduling.
Beneficial effect of the present invention is mainly manifested in:
1) small-power in certain area coverage, distribution type photovoltaic power generation device are utilized network communications technology in addition interconnected and concentrate grid-connected and scheduling controlling, each photovoltaic generation unit to there is secondary and control, improved the stability of system.
2) the photovoltaic DC electricity is grid-connected through centralized control center's centralized management again after inversion, can carry out easily reactive power compensation and active power filtering, has improved the quality of power supply, reduces harmonic wave and idle pollution to electrical network.
3) photovoltaic generation has intermittence and instable characteristics, and in zone, a plurality of distribution type photovoltaic power generation devices are grid-connected again after concentrating parallel connection, only has one and site, has reduced the impact to utility grid of intermittence and unstable electric power.
4) photovoltaic generation has the advantages that dispersion, power are little, quantity is many, and this system is managed a plurality of distributed photovoltaic power generations in zone concentratedly grid-connected, has realized scheduling and the management of photovoltaic generation, is convenient to the adjusting of utility grid Wave crest and wave trough.
5) due to the operating state of power-management centre Real-Time Monitoring distributed photovoltaic power generation system, and can carry out state control and power scheduling to it, avoid the islet operation state of photovoltaic generation power supply, the fail safe that has improved electrical network.
6) distributed photovoltaic power generation ground with load on the same area, through the scheduling of power-management centre, the photovoltaic electric energy can on-site elimination, has reduced the input of utility grid dilatation and the loss of delivery of electrical energy, has improved the economy of system.
7) distributed power generation regional ensemble control system adopts source model and communication control processor in standardization, makes power-management centre can manage a plurality of regional ensemble photovoltaic generating systems simultaneously, possesses good replicability, is convenient to the extensive grid-connected application of photovoltaic electric energy.
8) the generating peak value of photovoltaic generating system with the load peak of power consumption, overlap, utility grid is had to the regulating action of peak clipping.
9) realized the concentrated enforcement of whole system and centralized management, adopted visual administrative center, strengthened systemic-function, facilitated system maintenance, strengthened stability and the reliability of system, and reduced maintenance cost
The accompanying drawing explanation
Fig. 1 is distributed photovoltaic power generation regional ensemble system construction drawing of the present invention;
Fig. 2 is the schematic diagram of centralized control center of the present invention control system structural framing;
Fig. 3 is the control method of distributed photovoltaic power generation regional ensemble of the present invention and the schematic diagram of scheduling strategy.
Embodiment
By reference to the accompanying drawings embodiments of the invention are elaborated: the present embodiment is implemented take technical solution of the present invention under prerequisite, provided detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
With reference to Fig. 1～Fig. 3, a kind of distributed photovoltaic power generation regional integrated control method, the integrated control system adopted comprises photovoltaic battery array, distributed inverse control system, sensing network, electric control system in zone, District integrated control centring system and power scheduling control centre, described photovoltaic battery array is connected with distributed inverse control system, distributed inverse control system is connected with the District integrated control centring system, described sensing network respectively with photovoltaic battery array, distributed inverse control system, the District integrated control centring system connects, in described zone electric control system respectively with distributed inverse control system, the District integrated control centring system connects, described District integrated control centring system is connected with utility grid, the District integrated control centring system is connected with power scheduling control centre,
Distributed photovoltaic power generation regional integrated control method is concentrated grid-connectedly by small-power, distributed photovoltaic array are interconnected, and accepts the control of local power scheduling control centre, and detailed process is:
The direct current energy that described photovoltaic battery array transforms accesses respectively in each self-corresponding distributed inverse control system after confluxing, the industrial frequency AC electric energy that distributed inversion system is 380 volts by the direct current energy inversion, it is grid-connected that 380 volts of industrial frequency AC electric energy of distributed inversion system output concentrate on same node after by the parallel connection of District integrated control centring system.
The present invention adopts the control method of optimization that the small-power in certain area coverage, distribution type photovoltaic power generation device is interconnected concentrated grid-connected, and can accept the scheduling controlling of local electric power.Wherein photovoltaic battery array is solar energy converting electrical energy device, suits measures to local conditions to be arranged in the many solitary buildings top in zone, and the direct current energy that photovoltaic battery array transforms accesses respectively in each self-corresponding distributed inverse control system after confluxing.The industrial frequency AC electric energy that distributed inversion system is 380 volts by the direct current energy inversion on the one hand, on the other hand the maximum power point of photovoltaic battery array is followed the tracks of to control, regulate in real time the operating voltage of photovoltaic battery array, its power output is maximized all the time.It is grid-connected that 380 volts of industrial frequency AC electric energy of distributed inversion system output concentrate on same node after by the parallel connection of District integrated control centring system.In addition, the District integrated control center is according to the state model of distributed photovoltaic power generation power supply and the signal parameter of sensing network in zone, adjust and control the operating state of each distributed photovoltaic power generation power supply, and adopt peculiar algorithm to send the emergency control order according to partial parameters.In addition, Regional Control Center is communicated by letter with power-management centre, reports photovoltaic generation operating state and environmental parameter in zone, receives the dispatching command of power-management centre simultaneously, carries out the operation that it stops, adjusting, start generating.On each equipment, for detection of environmental parameter and electric parameter, and parameter signal is sent to the District integrated control centring system, for its decision-making in the various transducers layouts of sensing network and regional network.Working environment parameter and the operating state of centralized control center, receiving area, local power-management centre system, and according to actual power consumption situation, the distributed photovoltaic power generation system of regional ensemble is carried out to control and scheduling.
Described photovoltaic battery array is arranged on respectively many key construction tops in zone and forms multiple unit distributed photovoltaic arrays, its power can according to the building roof area with sunshine situation independent definite respectively.Each photovoltaic cell function array output direct current imports a plurality of distributed inverse control systems through header box.Distributed inverse control system is controlled respectively operating voltage and the power stage of its corresponding photovoltaic battery array in real time.
Described distributed inverse control system is comprised of many groups inverse control system.Each inverse control system unit is comprised of direct current power inversion module, maximum power point tracking module, communication module.The direct current power inversion module of described inverse control system adopts three-phase transless type (Transformerless) hybrid H-bridge (MOSFET+IGBT) topological structure.Photovoltaic battery array is exported to the industrial-frequency alternating current that the direct current power inversion is 380 volts of three-phases.The optimum operating voltage that the maximum power point tracking module of described inverse control system adopts the adaptive neuro-fuzzy inference algorithm to draw photovoltaic cell according to power voltage characteristic curve and the working environment parameter maximum power point algorithm of photovoltaic cell, then adjusted in real time the operating voltage of photovoltaic cell by two BOOST-BUCK control circuits, make it the power output maximum.The communication module of described inverse control system adopts MODBUS TCP/IP fieldbus industrial communication agreement and described District integrated control center to carry out exchanges data, the parameters such as operating state, voltage, electric current, power factor (PF), active power are uploaded to described District integrated control center, and accept the order at described District integrated control center.
Described sensing network is comprised of sensor network and data fusion module.Described sensor network comprises sets of temperature sensors, day illumination transducer group, is arranged in respectively the photovoltaic battery array scene; Also comprise Hall current sensor group, Hall voltage transducer group, and thermal imagery leakage current sensor group, frequency sensor group etc.A sensing network transducer is respectively used to detect the operating state of photovoltaic battery array operational environment, distributed inverse control system.Described data fusion module gathers each sensor assembly and calculates power, power factor (PF), meritorious and reactive power, temperature etc. by Ampere's law, Wien displacement blackbody radiation law etc., and adopt quantitative flexible strategy normalization algorithm to be processed data, if be short-circuited in district system, the electric accident centralized control centers such as dephasing, serious under-frequency will send promptly for the field control order.
In described zone, electric control system is accepted distributed inverse control system provisional orders and the order of District integrated control center, for changing the operating state of described photovoltaic battery array, distributed inverse control system in zone, control electric installation safety in generated output, support area.
Described District integrated control centring system is collected electrical module, communication module, data fusion and decision making algorithm, host computer application software etc. by electric power and is formed.The electric power of described District integrated control centring system collects electrical module and is comprised of major parts such as transformer, air switch, relay, logic programmable controllers, and 380 volts of industrial-frequency alternating current parallel connections of three-phase of 6 distribution type inverse control system institutes inversion are collected to the access utility grid.The communication module of described District integrated control centring system has two passages of intra-area communication and the outer telecommunication in zone.The intra-area communication passage is for communicating by letter with sensing network with distributed inverse control system in zone, adopt signal data in MODBUS TCP/IP field bus protocol pickup area, and send control command to distributed inversion system, electric control system interdependent node.The outer telecommunication passage in zone is for communicating by letter with described power-management centre, adopt the internet User Datagram Protocol of general UDP and special intelligent electrical network coding and cryptographic algorithm condition of work and the state to each critical piece in control centre's transfer system, comprise temperature data, day illumination data, active power, grid-connected node voltage, power factor, harmonic component etc., the dispatching command at while receiving scheduling center, for electric power or the operating state of photovoltaic generation in adjustment region.The data fusion of described District integrated control centring system and decision making algorithm adopt the multisensor Data Fusion technology of D-S evidence theory and fuzzy mathematics, the signal data of comprehensive sensing network, then adopt quantitative flexible strategy normalization algorithm to be analyzed fused data, and send control command to electric control module and distributed inverse control system.The host computer application software of described District integrated control centring system adopts OO program developing method exploitation, has the advantages that the good stability extensibility is strong, man-machine interface, control logic and database major part, consists of.Man-machine interface is the demonstration and order transmit operation with interior each electric equipment operating state in zone for operational environment.The order that control logic is used for after data fusion and decision making algorithm produces.Database is used for the daily record of preserving working environment parameter, operating state historical data and variety of event, has the characteristics of trackability.
Described power scheduling control centre is a set of remote monitoring application software, adopts OO software programming technique exploitation, possesses many group man-machine interfaces, can monitor the operating state of a plurality of regional ensemble systems.Adopt condition of work parameter and the state of general internet User Datagram Protocol and special intelligent electrical network coding and cryptographic algorithm receiving area integrated control system.In data such as the temperature of man-machine interface viewing area integrated control system, day illumination, active power, grid-connected node voltage, power factor, harmonic components.Possess to the regional ensemble control system and send the power scheduling order, comprise and stop generating, quantitatively generating, startup generating, quality of power supply feedback etc., for electric power or the operating state of photovoltaic generation in adjustment region.
The present embodiment is distributed photovoltaic power generation regional ensemble system demonstration project planning in Certain University of Hangzhou.This distributed photovoltaic power generation regional integrated control system is comprised of major parts such as electric control system in 6 groups of photovoltaic battery array unit, 6 distribution type inverse control systems, 1 sensing network, 1 group of zone, 1 District integrated control centring system and remote power dispatching control centers, as shown in Figure 1.
6 photovoltaic cell function arrays are arranged on respectively 6 key construction tops in the school and form the distributed photovoltaic arrays, and its power has two kinds of 15KVA and 20KVA.Each photovoltaic cell function array output direct current imports 6 distributed inverse control systems through header box.6 distributed inverse control systems are controlled respectively operating voltage and the power stage of its corresponding photovoltaic battery array in real time.Each inverse control system monomer of 6 inverse control systems is comprised of direct current power inversion module, maximum power point tracking module, communication module module.Its direct current power inversion module adopts three-phase transless type (Transformerless) hybrid H-bridge (MOSFET+IGBT) topological structure.Photovoltaic battery array is exported to the industrial-frequency alternating current that the direct current power inversion is 380 volts of three-phases.The optimum operating voltage that its maximum power point tracking module adopts adaptive neuro-fuzzy inference algorithm to draw photovoltaic cell according to power voltage characteristic curve and the working environment parameter maximum power point algorithm of photovoltaic cell, then adjusted in real time the operating voltage of photovoltaic cell by two BOOST-BUCK control circuits, making it maximum its communication module of power output adopts MODBUS TCP/IP fieldbus industrial communication agreement and described District integrated control center to carry out exchanges data, by operating state, voltage, electric current, power factor (PF), the parameters such as active power are uploaded to described District integrated control center, and accept the order at described District integrated control center.
Sensor network comprises 6 groups of sets of temperature sensors, day illumination transducer group, is arranged in respectively the photovoltaic battery array scene; Also comprise 12 groups of Hall current sensor groups, Hall voltage transducer group, and 6 groups of thermal imagery leakage current sensor groups, 6 class frequency transducer groups etc.A sensing network transducer is respectively used to detect the operating state of photovoltaic battery array operational environment, distributed inverse control system.Data fusion module gathers each sensor assembly and calculates power, power factor (PF), meritorious and reactive power, temperature etc. by Ampere's law, Wien displacement blackbody radiation law etc., and adopt quantitative flexible strategy normalization algorithm to be processed data, if be short-circuited in district system, the electric accident centralized control centers such as dephasing, serious under-frequency will send promptly for the field control order.In zone, electric control system is accepted distributed inverse control system provisional orders and the order of District integrated control center, for changing the operating state of described photovoltaic battery array, distributed inverse control system in zone, control electric installation safety in generated output, support area.
The District integrated control centring system is collected electrical module, communication module, data fusion and decision making algorithm, host computer application software, man-machine interface etc. by electric power and is formed.The electric power of District integrated control centring system collects electrical module and is comprised of major parts such as transformer, air switch, relay, logic programmable controllers, and 380 volts of industrial-frequency alternating current parallel connections of three-phase of 6 distribution type inverse control system institutes inversion are collected to the access utility grid.The communication module of District integrated control centring system has two passages of intra-area communication and the outer telecommunication in zone.The intra-area communication passage is for communicating by letter with sensing network with distributed inverse control system in zone, adopt signal data in MODBUS TCP/IP field bus protocol pickup area, and send control command to distributed inversion system, electric control system interdependent node.The outer telecommunication passage in zone is for communicating by letter with described power-management centre, adopt the internet User Datagram Protocol of general UDP and special intelligent electrical network coding and cryptographic algorithm condition of work and the state to each critical piece in control centre's transfer system, comprise temperature data, day illumination data, active power, grid-connected node voltage, power factor, harmonic component etc., the dispatching command at while receiving scheduling center, for electric power or the operating state of photovoltaic generation in adjustment region.The data fusion of described District integrated control centring system and decision making algorithm adopt the multisensor Data Fusion technology of D-S evidence theory and fuzzy mathematics, the signal data of comprehensive sensing network, then adopt quantitative flexible strategy normalization algorithm to be analyzed fused data, and send control command to electric control module and distributed inverse control system.The host computer application software of described District integrated control centring system adopts OO program developing method exploitation, man-machine interface, control logic and database major part, consists of.Man-machine interface is the demonstration and order transmit operation with interior each electric equipment operating state in zone for operational environment.The order that control logic is used for after data fusion and decision making algorithm produces.Database is used for the daily record of preserving working environment parameter, operating state historical data and variety of event, has the characteristics of trackability.
Power scheduling control centre is a set of remote monitoring application software, adopts OO software programming technique exploitation, possesses many group man-machine interfaces, can monitor the operating state of a plurality of regional ensemble systems.Adopt condition of work parameter and the state of general internet User Datagram Protocol and special intelligent electrical network coding and cryptographic algorithm receiving area integrated control system.In data such as the temperature of man-machine interface viewing area integrated control system, day illumination, active power, grid-connected node voltage, power factor, harmonic components.Possess to the regional ensemble control system and send the power scheduling order, comprise and stop generating, quantitatively generating, startup generating, quality of power supply feedback etc., for electric power or the operating state of photovoltaic generation in adjustment region.
Finally, it is also to be noted that, what more than enumerate is only a specific embodiment of the present invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention, all should think protection scope of the present invention.
Claims (6)
1. a distributed photovoltaic power generation regional integrated control method, it is characterized in that: the integrated control system adopted comprises photovoltaic battery array, distributed inverse control system, sensing network, electric control system in zone, District integrated control centring system and power scheduling control centre, described photovoltaic battery array is connected with distributed inverse control system, distributed inverse control system is connected with the District integrated control centring system, described sensing network respectively with photovoltaic battery array, distributed inverse control system, the District integrated control centring system connects, in described zone electric control system respectively with distributed inverse control system, the District integrated control centring system connects, described District integrated control centring system is connected with utility grid, the District integrated control centring system is connected with power scheduling control centre,
Distributed photovoltaic power generation regional integrated control method is concentrated grid-connectedly by small-power, distributed photovoltaic array are interconnected, and accepts the control of local power scheduling control centre, and detailed process is:
The direct current energy that described photovoltaic battery array transforms accesses respectively in each self-corresponding distributed inverse control system after confluxing, the industrial frequency AC electric energy that distributed inversion system is 380 volts by the direct current energy inversion, it is grid-connected that 380 volts of industrial frequency AC electric energy of distributed inversion system output concentrate on same node after by the parallel connection of District integrated control centring system;
Described sensing network is comprised of sensor network and data fusion module, comprise sets of temperature sensors, light radiation degree transducer group, Hall current sensor group, Hall voltage transducer group, frequency sensor group and thermal imagery leakage current sensor group, described sets of temperature sensors, day illumination transducer group layout and described photovoltaic battery array scene, described Hall current sensor group, Hall voltage transducer group, frequency sensor group and thermal imagery leakage current sensor group are arranged in described distributed inversion control; Described data fusion module gathers each sensor die blocks of data and calculates power, power factor (PF), meritorious and reactive power, temperature by Ampere's law, Wien displacement blackbody radiation law, and adopts quantitative flexible strategy normalization algorithm data to be processed and sent promptly for the scene order.
2. a kind of distributed photovoltaic power generation regional integrated control method as claimed in claim 1, it is characterized in that: described District integrated control center method is according to the state model of distributed photovoltaic power in zone and regional internal burden characteristic coupling, and in conjunction with the signal parameter adjustment of sensing network and control the operating state of each distributed photovoltaic power.
3. a kind of distributed photovoltaic power generation regional integrated control method as claimed in claim 1 or 2, it is characterized in that: described District integrated control centring system is communicated by letter with power scheduling control centre, report photovoltaic generation operating state and environmental parameter in zone, receive the dispatching command of power-management centre simultaneously, carry out it and stop, adjusting, start generating operation.
4. a kind of distributed photovoltaic power generation regional integrated control method as claimed in claim 1, it is characterized in that: described quantitative flexible strategy normalizing algorithm is weighted power varying offset amount, frequency change side-play amount, change in voltage side-play amount, curent change side-play amount, variations in temperature side-play amount, then be normalized to [01] interval urgency level, when the normalization urgency level is greater than set threshold vector, be corresponding unsafe condition, corresponding promptly for the scene order by sending.
5. a kind of distributed photovoltaic power generation regional integrated control method as claimed in claim 1 or 2, it is characterized in that: described distributed inversion system adopts the adaptive neuro-fuzzy inference algorithm according to I-V, P-V characteristic curve and the temperature of photovoltaic cell, the relation property of solar irradiance various working environments parameter, maximum power point to photovoltaic battery array is followed the tracks of, and regulate in real time the optimum operating voltage of controlling photovoltaic battery array by two BOOST-BUCK control circuits, its power output is maximized all the time.
6. a kind of distributed photovoltaic power generation regional integrated control method as claimed in claim 5, it is characterized in that: the fuzzy inference system of described adaptive neuro-fuzzy inference algorithm based on adaptive neural network, adopt five layer self-adapting fuzzy neural reasoning neural network structures of Sugeno fuzzy model, form input vector u (V by current voltage, electric current, power, temperature, solar irradiance parameter, I, P, T, R), the optimum operating voltage that output f (u) is maximum power point.
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| CN103051000A (en) * | 2012-12-17 | 2013-04-17 | 深圳供电局有限公司 | Large-scale distribution type power generation-based power grid dispatching method |
| CN103606913B (en) * | 2013-10-22 | 2015-12-09 | 清华大学 | Distributed hybrid power system power source planning method |
| CN103545931B (en) * | 2013-10-30 | 2015-08-05 | 国家电网公司 | A kind of distributed photovoltaic power generation grid connection interface device |
| TWI493317B (en) * | 2014-03-20 | 2015-07-21 | Univ Kun Shan | Solar power generation devices, solar power generation methods, maximum power tracking module and maximum power tracking control method |
| CN103928940A (en) * | 2014-03-31 | 2014-07-16 | 国家电网公司 | Active power control device and control method for distributed photovoltaic power station |
| CN104242350B (en) * | 2014-10-11 | 2016-06-01 | 云南拓日科技有限公司 | Based on the anti-isolated island method of miniature grid-connected inverter of team control disturbance |
| CN104485692A (en) * | 2014-12-02 | 2015-04-01 | 常州大学 | Distributed photovoltaic power generation energy dispatching system and method |
| CN110011415B (en) * | 2019-03-18 | 2022-04-15 | 东南大学 | Lumped/distributed multi-parameter detection device suitable for intelligent power grid |
| CN113659917B (en) * | 2021-09-15 | 2023-08-18 | 宁夏智安电力工程有限公司 | Distributed photovoltaic power generation system and construction method thereof |
| CN113972891B (en) * | 2021-09-28 | 2024-05-07 | 中国华能集团清洁能源技术研究院有限公司 | Photovoltaic power generation system |
| CN114094862A (en) * | 2021-11-12 | 2022-02-25 | 株洲变流技术国家工程研究中心有限公司 | Photovoltaic inverter electric energy output control method, device and system |
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