CN102355004A - Distributed photovoltaic power generation regional integrated control system - Google Patents
Distributed photovoltaic power generation regional integrated control system Download PDFInfo
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Abstract
The invention discloses a distributed photovoltaic power generation regional integrated control system, which 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 system, 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 distributed photovoltaic power generation integrated mode that is incorporated into the power networks in zone and control system.
Background technology
Along with expanding economy, energy shortage is the problem that each country of the whole world all faces.Simultaneously be faced with exhausted danger as most important available fossil energy material such 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.On the other hand, problems such as the environmental pollution that fossil energy brought, climate warming can't have been ignored, have influenced the development and the popularization of sustainable development, energy-conserving and environment-protective theory, just more and more receive people's attention.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 have 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 big mains supply, reducing net capacity, peak load shifting improves power supply reliability.
But photovoltaic generation itself has randomness and the intermittent characteristics that are different from conventional power supply, and it is incorporated into the power networks the quality of power supply of electrical network and safe and stable operation are constituted certain threat.On the one hand, the trend that the injection of photovoltaic power has changed partial electric grid distributes, and the quality of voltage and the stability of partial electric grid is had very big influence, has limited the mode and the scale of photovoltaic generation connecting system.On the other hand, the motive power controllability of photovoltaic generation is not strong, and the limited size that whether is in generating state and goes out merit is in the performance of weather conditions and photovoltaic system.See that from the angle of electrical network the photovoltaic generation that is incorporated into the power networks is equivalent to a disturbing source with randomness, maybe the reliability service of electrical network be impacted at any time.Therefore, above-mentioned photovoltaic generating system is because large-scale promotion and the application that operation of power networks that the quality of power supply, unsteadiness, island effect etc. cause and safety problem have greatly limited China small-power distributed photovoltaic power generation system.
The distributed photovoltaic power generation of China does not also get into the popularization stage, and present demonstrative project engineering is main with the construction of jumbo photovoltaic plant still.Except the large-sized photovoltaic power station; " golden sun demonstration project " has the advantage of distributed photovoltaic power generation, but because technical reason, its electric power is main with on-site elimination mainly; Its control centre can only monitor distributed power station parameter, uncontrollablely more can't carry out power scheduling.Being in the solar power generation developed country of representative with Germany, Japan, be that the distributed photovoltaic power generation unit is incorporated into the power networks generally with only solitary building, obtained preferably and used.But there are this many defectives in existing this distributed photovoltaic power generation and net mode in the practical implementation application process:
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, quality of power supply management is inconvenient, also is not easy to the electrical network periodic maintenance, has potential safety hazard.
3) owing to small scale, quantity is many, can't carry out the electric power uniform dispatching, brings great burden for the power scheduling of existing electrical network, and has the danger of islet operation.
4) the independent dispersion, the electrical network access point is numerous, and intelligence 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 grid-connecting mode and control system are not economical and practical, do not possess the technical foundation of large-scale promotion.
Summary of the invention
For overcome existing distributed photovoltaic power generation grid-connecting mode and control system less stable, can't concentrate the monitoring of being incorporated into the power networks, can't carry out power scheduling, the relatively poor deficiency of maintainability, the present invention provides a kind of and improves the distributed photovoltaic power generation stability of a system, concentrate the centralized monitor scheduling of being incorporated into the power networks, strengthen the distributed photovoltaic power generation zone of maintainability integrated and net mode and control system.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of distributed photovoltaic power generation zone integrated control system comprises electric control system, set of regions control centring system and power scheduling control centre in photovoltaic battery array, distributed inverse control system, sensing network, the zone.Said photovoltaic battery array is connected with said distributed inverse control system; Said distributed inverse control system is connected with said set of regions control centring system; Said sensing network is connected with photovoltaic battery array, distributed inverse control system and set of regions control centring system respectively; Electric control system is connected with distributed inverse control system, set of regions control centring system respectively in the said zone; Said set of regions control centring system is connected with city's electrical network, and said set of regions control centring system is connected with power scheduling control centre.
Said photovoltaic battery array is installed on each building top in the zone, forms multiple unit distributed photovoltaic array, and its watt level is suited measures to local conditions, and can be used factor decisions such as illuminating area, shadow region by the building roof.Each photovoltaic battery array unit output DC can import distributed inverse control system through header box.Each its operating voltage of photovoltaic battery array unit and power output are controlled by said distributed inverse control system in real time.
Said distributed inverse control system is made up of the corresponding many inverse control systems in photovoltaic battery array unit.Said inverse control system monomer is made up of direct current power inversion module, maximum power point tracking control module, communication module.
Further, the direct current power inversion module of inverse control system adopts three-phase transless (Transformerless) mixed type H bridge (MOSFET+IGBT) topological structure, has the advantage of efficient height, two-way changing and reactive power compensation.It with the output DC power inversion of photovoltaic battery array institute 380 volts industrial-frequency alternating current.
Further, the maximum power point tracking control module of inverse control system is by two BOOST-BUCK control circuits and the neural reasoning of adaptive fuzzy (adaptive neuro-fuzzy inference, ANFI) algorithm composition.Relation property according to working environment parameters such as I-V, P-V characteristic curve and the temperature of photovoltaic cell, solar irradiances adopts the ANFI algorithm to draw the optimum operating voltage of photovoltaic cell; By the operating voltage of two BOOST-BUCK control circuit modulated in real time photovoltaic cells, make it the power output maximum then.
Further, the neural reasoning algorithm of said adaptive fuzzy adopts five layers of ANFI neural network structure of Sugeno fuzzy model based on the fuzzy inference system of adaptive neural network; Form input vector u (V by current voltage, electric current, power, temperature, solar irradiance parameter; I, P, T; R), output f (u) is the optimum operating voltage of maximum power point.
Further; The communication module of inverse control system adopts fieldbus industrial communication agreement and said set of regions control center to carry out exchanges data; Parameters such as operating state, voltage, electric current, power factor (PF), active power are uploaded to said set of regions control center, and accept the order at said set of regions control center.
Said sensing network is made up of sensor network and data fusion module.Said sensor network comprises compositions such as sets of temperature sensors, Yanguan Pass radiancy sensor groups, Hall current sensor group, Hall voltage sensor groups, frequency sensor group, thermal imagery leakage current sensor group.Said temperature, solar irradiation degree transducer arrangements are in said photovoltaic battery array scene; Said Hall current sensor group, Hall voltage sensor groups, thermal imagery leakage current sensor group etc. are arranged in the said distributed inversion control, are used to detect the operating state of photovoltaic battery array and distributed inverse control system.The data of said each sensor assembly of data fusion module collection also calculate power, power factor (PF), meritorious and reactive power, temperature etc. through Ampere's law, Wien displacement blackbody radiation law etc., and adopt quantitative flexible strategy normalization algorithm that data are handled and sent and promptly order to on-the-spot.
Said quantitative flexible strategy normalizing algorithm carries out weighting with variable power side-play amount, frequency change side-play amount, change in voltage side-play amount, electric current variation side-play amount, variations in temperature side-play amount; Be normalized to [0 1] interval urgency level then; When normalization urgency level during greater than set threshold value vector; Be corresponding unsafe condition, with sending the corresponding scene that promptly is directed against order.
Electric control system is accepted distributed inverse control system provisional orders and the order of set of regions control center in the said zone; Be used to change the operating state of said photovoltaic battery array, distributed inverse control system in the zone, electric installation safety in control generated output, the support area.
Said set of regions control centring system is compiled electrical module, communication module, data fusion and decision making algorithm, host computer application software etc. by electric power and is formed.
Further; The electric power of said set of regions control centring system compiles electrical module and is made up of major parts such as transformer, air switch, relay, logic programmable controllers, and 380 volts of industrial-frequency alternating current parallel connections of distributed inverse control system institute inversion are compiled the access utility grid.
Further, the communication module of said set of regions control centring system has two passages of intra-area communication and the outer telecommunication in zone.The intra-area communication passage be used for the zone in distributed inverse control system communicate by letter with sensing network, adopt signal data in the field bus protocol pickup area, and to distributed inversion system, electric control system interdependent node transmitting control commands.The outer telecommunication passage in zone is used for communicating by letter with said power-management centre; Adopt the condition of work and the state of general internet User Datagram Protocol and special intelligent electrical network coding and AES each critical piece in control centre's transfer system; Comprise temperature data, light radiation degrees of data, active power, the node voltage that is incorporated into the power networks, power factor, harmonic component etc.; The dispatching command at receiving scheduling center simultaneously is used for the electric power or the operating state of photovoltaic generation in the adjustment region.
Further; The data fusion of said set of regions control centring system and decision making algorithm adopt the sensor Data Fusion of D-S evidence theory and fuzzy mathematics; The signal data of comprehensive sensing network; Adopt quantitative flexible strategy normalization algorithm that fused data is analyzed then, and send control command to electrical control module and distributed inverse control system.
Further, the host computer application software of said set of regions control centring system adopts OO program developing method exploitation, has the strong characteristics of good stability extensibility, is made up of major parts such as man-machine interface, control logic and databases.Man-machine interface is used for the demonstration and order transmit operation of each electric equipment operating state in operational environment and the zone.The order that control logic is used for after data fusion and the decision making algorithm produces.Database is used to preserve the daily record of working environment parameter, operating state historical data and variety of event, has the characteristics of trackability.
Said power scheduling control centre is a cover 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 integrated systems.Adopt the condition of work parameter and the state of general internet User Datagram Protocol and special intelligent electrical network coding and AES receiving area integrated control system.In data such as the temperature of man-machine interface viewing area integrated control system, light radiation degree, active power, the node voltage that is incorporated into the power networks, power factor, harmonic components.Possess to regional integrated control system and send the power scheduling order, comprise generation outage, quantitatively generating, start generating, quality of power supply feedback etc., be used for the electric power or the operating state of photovoltaic generation in the adjustment region.
Technical conceive of the present invention is: control method, the communication technology and the power scheduling strategy of multilayer distributed microgrid are incorporated in the solar photovoltaic power generation grid-connecting system; Utilize network communications technology interconnected in addition and concentrate and be incorporated into the power networks and scheduling controlling in the small-power in the certain area coverage, distributed photovoltaic power generation device; Can combine to form the high efficient and flexible electric power system of an integral body with existing concentrated power supply system, improve stability, reliability and the power quality of whole electric power system.
Form by major parts such as electric control system, set of regions control centring system, power scheduling control centre in photovoltaic battery array, distributed inverse control system, sensing network, the zone; Adopt distinctive control method; Shown in accompanying drawing 3; Small-power in the certain area coverage, interconnected the concentrating of distributed photovoltaic power generation device are incorporated into the power networks, and can be accepted the scheduling controlling of local electric power.Wherein photovoltaic battery array is the solar energy converting electrical energy devices, suits measures to local conditions to be arranged in the many solitary buildings top in the zone, and the direct current energy that photovoltaic battery array transformed inserts respectively after confluxing separately in the corresponding distributed inverse control system.Distributed inversion system is 380 volts industrial frequency AC electric energy on the one hand with the direct current energy inversion; Maximum power point to photovoltaic battery array carries out tracking Control on the other hand; The operating voltage of real-time regulated photovoltaic battery array maximizes its power output all the time.380 volts of industrial frequency AC electric energy of distributed inversion system output concentrate on same node after by the parallel connection of set of regions control centring system and are incorporated into the power networks.In addition; Set of regions control center is according to the state model of distributed photovoltaic power generation power supply and the signal parameter of sensing network in the 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 the power-management centre, reports photovoltaic generation operating state and environmental parameter in the zone, receives the dispatching command of power-management centre simultaneously, carries out the operation that it stops, adjusting, start generating.On each equipment, be used for testing environment parameter and electric parameter, and parameter signal is sent to set of regions control centring system in the various transducer arrangements of sensing network and the regional network, supply its decision-making.The working environment parameter and the operating state of local power-management centre receiving area collection control centring system, and according to the actual civil power electric power situation of dissolving the integrated distributed photovoltaic power generation system in zone is controlled and dispatches.
Beneficial effect of the present invention mainly shows:
1) utilize network communications technology in addition interconnected and concentrate and be incorporated into the power networks and scheduling controlling in the small-power in the certain area coverage, distributed photovoltaic power generation device, each photovoltaic generation unit has secondary control, has improved the stability of system.
2) the photovoltaic DC electricity can carry out reactive power compensation and active power filtering easily through being incorporated into the power networks through collection control center centralized management after the inversion again, has improved the quality of power supply, reduces harmonic wave and idle pollution to electrical network.
3) photovoltaic generation has intermittent and instable characteristics, and a plurality of distributed photovoltaic power generation devices are incorporated into the power networks after concentrating parallel connection again in the zone, has only one and site, has reduced the impact to city's electrical network of intermittence and unstable electric power.
4) photovoltaic generation has dispersion, little, the quantity characteristics how of power, and this system is incorporated into the power networks a plurality of distributed photovoltaic power generations centralized management in the zone, has realized the scheduling and the management of photovoltaic generation, is convenient to the adjusting of utility grid Wave crest and wave trough.
5) because the power-management centre is monitored the operating state of distributed photovoltaic power generation system in real time, and can carry out State Control and power scheduling, avoid the islet operation state of photovoltaic generation power supply, the fail safe that has improved electrical network it.
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 electric energy transmitting, has improved the economy of system.
7) distributed power generation zone integrated control system adopts source model and communication control processor in the standardization, makes the power-management centre can manage the integrated photovoltaic generating system in a plurality of zones simultaneously, but possesses good generalization, is convenient to the application of being incorporated into the power networks on a large scale of photovoltaic electric energy.
8) the generating peak value of photovoltaic generating system with overlap with the load peak of power consumption, utility grid is had the regulating action of peak clipping.
9) realized concentrated enforcement of whole system and centralized management, adopted visual administrative center, strengthened systemic-function, made things convenient for system maintenance, strengthened the stability and the reliability of system, and reduced maintenance cost
Description of drawings
Fig. 1 is the integrated system construction drawing in distributed photovoltaic power generation of the present invention zone;
Fig. 2 is the sketch map that the present invention collects control central control system structural framing;
Fig. 3 is the integrated control method in distributed photovoltaic power generation of the present invention zone and the sketch map of scheduling strategy.
Embodiment
In conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment provided detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment being to implement under the prerequisite with technical scheme of the present invention.
With reference to Fig. 1～Fig. 3; A kind of distributed photovoltaic power generation zone integrated control system; Form by major parts such as electric control system, set of regions control centring system and power scheduling control centre in photovoltaic battery array, distributed inverse control system, sensing network, the zone; Said photovoltaic battery array is connected with said distributed inverse control system; Said distributed inverse control system is connected with said set of regions control centring system, and said sensing network is connected with photovoltaic battery array, distributed inverse control system and set of regions control centring system respectively, and electric control system is connected with distributed inverse control system, set of regions control centring system respectively in the said zone; Said set of regions control centring system is connected with city's electrical network, and said set of regions control centring system is connected with power scheduling control centre.
The present invention adopts control method that the small-power in the certain area coverage, interconnected the concentrating of distributed photovoltaic power generation device are incorporated into the power networks, and can be accepted the scheduling controlling of local electric power.Wherein photovoltaic battery array is the solar energy converting electrical energy devices, suits measures to local conditions to be arranged in the many solitary buildings top in the zone, and the direct current energy that photovoltaic battery array transformed inserts respectively after confluxing separately in the corresponding distributed inverse control system.Distributed inversion system is 380 volts industrial frequency AC electric energy on the one hand with the direct current energy inversion; Maximum power point to photovoltaic battery array carries out tracking Control on the other hand; The operating voltage of real-time regulated photovoltaic battery array maximizes its power output all the time.380 volts of industrial frequency AC electric energy of distributed inversion system output concentrate on same node after by the parallel connection of set of regions control centring system and are incorporated into the power networks.In addition; Set of regions control center is according to the state model of distributed photovoltaic power generation power supply and the signal parameter of sensing network in the 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 the power-management centre, reports photovoltaic generation operating state and environmental parameter in the zone, receives the dispatching command of power-management centre simultaneously, carries out the operation that it stops, adjusting, start generating.On each equipment, be used for testing environment parameter and electric parameter, and parameter signal is sent to set of regions control centring system in the various transducer arrangements of sensing network and the regional network, supply its decision-making.The working environment parameter and the operating state of local power-management centre receiving area collection control centring system, and according to the actual electric power situation of dissolving the integrated distributed photovoltaic power generation system in zone is controlled and dispatches.
Said photovoltaic battery array is installed in many key construction tops composition multiple unit distributed photovoltaic arrays in the zone respectively, and its power can be independent respectively definite according to building roof area and solar irradiance situation.Each photovoltaic cell function array output DC header box of flowing through imports a plurality of distributed inverse control systems.Distributed inverse control system is the operating voltage of its corresponding photovoltaic battery array of control and power output in real time respectively.
Said distributed inverse control system is made up of many groups inverse control system.Each inverse control system unit is made up of direct current power inversion module, maximum power point tracking control module, communication module.The direct current power inversion module of said inverse control system adopts three-phase transless type (Transformerless) mixed type H bridge (MOSFET+IGBT) topological structure.With the output DC power inversion of photovoltaic battery array institute is the industrial-frequency alternating current of 380 volts of three-phases.The optimum operating voltage that the maximum power point tracking control module of said inverse control system adopts the neural reasoning algorithm of adaptive fuzzy to draw photovoltaic cell according to the power voltage characteristic curve and the working environment parameter maximum power point algorithm of photovoltaic cell; Adjust the operating voltage of photovoltaic cell then by two BOOST-BUCK control circuits in real time, make it the power output maximum.The communication module of said inverse control system adopts MODBUS TCP/IP fieldbus industrial communication agreement and said set of regions control center to carry out exchanges data; Parameters such as operating state, voltage, electric current, power factor (PF), active power are uploaded to said set of regions control center, and accept the order at said set of regions control center.
Said sensing network is made up of sensor network and data fusion module.Said sensor network comprises sets of temperature sensors, solar irradiance sensor groups, is arranged in the photovoltaic battery array scene respectively; Also comprise Hall current sensor group, Hall voltage sensor groups, and thermal imagery leakage current sensor group, frequency sensor group etc.A sensing network transducer is respectively applied for the operating state that detects photovoltaic battery array operational environment, distributed inverse control system.Said each sensor assembly of data fusion module collection also calculates power, power factor (PF), meritorious and reactive power, temperature etc. through Ampere's law, Wien displacement blackbody radiation law etc.; And adopt quantitative flexible strategy normalization algorithm that data are handled, if be short-circuited in the district system, electric accident collection control centers such as dephasing, serious under-frequency will send urgent to the field control order.
Electric control system is accepted distributed inverse control system provisional orders and the order of set of regions control center in the said zone; Be used to change the operating state of said photovoltaic battery array, distributed inverse control system in the zone, electric installation safety in control generated output, the support area.
Said set of regions control centring system is compiled 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 said set of regions control centring system compiles electrical module and is made up 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 compiled the access utility grid.The communication module of said set of regions control centring system has two passages of intra-area communication and the outer telecommunication in zone.The intra-area communication passage be used for the zone in distributed inverse control system communicate by letter with sensing network; Adopt signal data in the MODBUS TCP/IP field bus protocol pickup area, and to distributed inversion system, electric control system interdependent node transmitting control commands.The outer telecommunication passage in zone is used for communicating by letter with said power-management centre; Adopt the condition of work and the state of internet User Datagram Protocol of general UDP and special intelligent electrical network coding and AES each critical piece in control centre's transfer system; Comprise temperature data, solar radiation degrees of data, active power, the node voltage that is incorporated into the power networks, power factor, harmonic component etc.; The dispatching command at receiving scheduling center simultaneously is used for the electric power or the operating state of photovoltaic generation in the adjustment region.The data fusion of said set of regions control centring system and decision making algorithm adopt the sensor Data Fusion of D-S evidence theory and fuzzy mathematics; The signal data of comprehensive sensing network; Adopt quantitative flexible strategy normalization algorithm that fused data is analyzed then, and send control command to electrical control module and distributed inverse control system.The host computer application software of said set of regions control centring system adopts OO program developing method exploitation, has the strong characteristics of good stability extensibility, is made up of major parts such as man-machine interface, control logic and databases.Man-machine interface is used for the demonstration and order transmit operation of each electric equipment operating state in operational environment and the zone.The order that control logic is used for after data fusion and the decision making algorithm produces.Database is used to preserve the daily record of working environment parameter, operating state historical data and variety of event, has the characteristics of trackability.
Said power scheduling control centre is a cover 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 integrated systems.Adopt the condition of work parameter and the state of general internet User Datagram Protocol and special intelligent electrical network coding and AES receiving area integrated control system.In data such as the temperature of man-machine interface viewing area integrated control system, solar irradiance, active power, the node voltage that is incorporated into the power networks, power factor, harmonic components.Possess to regional integrated control system and send the power scheduling order, comprise generation outage, quantitatively generating, start generating, quality of power supply feedback etc., be used for the electric power or the operating state of photovoltaic generation in the adjustment region.
Present embodiment is distributed photovoltaic power generation zone integrated system demonstration project planning in the colleges and universities of Hangzhou.This distributed photovoltaic power generation zone integrated control system is made up 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, the 1 group of zone, 1 set of regions control centring system and remote power dispatching control centers, and is as shown in Figure 1.
6 photovoltaic cell function arrays are installed in the school 6 key construction tops respectively and form the distributed photovoltaic arrays, and its power has two kinds of 15KVA and 20KVA.Each photovoltaic cell function array output DC header box of flowing through imports 6 distributed inverse control systems.6 the distributed inverse control system operating voltage of its corresponding photovoltaic battery array of control and power outputs in real time respectively.Each inverse control system monomer of 6 inverse control systems is made up of direct current power inversion module, maximum power point tracking control module, communication module module.Its direct current power inversion module adopts three-phase transless type (Transformerless) mixed type H bridge (MOSFET+IGBT) topological structure.With the output DC power inversion of photovoltaic battery array institute is the industrial-frequency alternating current of 380 volts of three-phases.The optimum operating voltage that its maximum power point tracking control module adopts the neural reasoning algorithm of adaptive fuzzy to draw photovoltaic cell according to the power voltage characteristic curve and the working environment parameter maximum power point algorithm of photovoltaic cell; Adjust the operating voltage of photovoltaic cell then in real time by two BOOST-BUCK control circuits; Making it maximum its communication module of power output adopts MODBUS TCP/IP fieldbus industrial communication agreement and said set of regions control center to carry out exchanges data; Parameters such as operating state, voltage, electric current, power factor (PF), active power are uploaded to said set of regions control center, and accept the order at said set of regions control center.
Sensor network comprises 6 groups of sets of temperature sensors, solar irradiance sensor groups, is arranged in the photovoltaic battery array scene respectively; Also comprise 12 groups of Hall current sensor groups, Hall voltage sensor groups, and 6 groups of thermal imagery leakage current sensor groups, 6 class frequency sensor groups etc.A sensing network transducer is respectively applied for the operating state that detects photovoltaic battery array operational environment, distributed inverse control system.Each sensor assembly of data fusion module collection also calculates power, power factor (PF), meritorious and reactive power, temperature etc. through Ampere's law, Wien displacement blackbody radiation law etc.; And adopt quantitative flexible strategy normalization algorithm that data are handled, if be short-circuited in the district system, electric accident collection control centers such as dephasing, serious under-frequency will send urgent to the field control order.Electric control system is accepted distributed inverse control system provisional orders and the order of set of regions control center in the zone; Be used to change the operating state of said photovoltaic battery array, distributed inverse control system in the zone, electric installation safety in control generated output, the support area.
Set of regions control centring system is compiled 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 set of regions control centring system compiles electrical module and is made up 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 compiled the access utility grid.The communication module of set of regions control centring system has two passages of intra-area communication and the outer telecommunication in zone.The intra-area communication passage be used for the zone in distributed inverse control system communicate by letter with sensing network; Adopt signal data in the MODBUS TCP/IP field bus protocol pickup area, and to distributed inversion system, electric control system interdependent node transmitting control commands.The outer telecommunication passage in zone is used for communicating by letter with said power-management centre; Adopt the condition of work and the state of internet User Datagram Protocol of general UDP and special intelligent electrical network coding and AES each critical piece in control centre's transfer system; Comprise temperature data, solar radiation degrees of data, active power, the node voltage that is incorporated into the power networks, power factor, harmonic component etc.; The dispatching command at receiving scheduling center simultaneously is used for the electric power or the operating state of photovoltaic generation in the adjustment region.The data fusion of said set of regions control centring system and decision making algorithm adopt the sensor Data Fusion of D-S evidence theory and fuzzy mathematics; The signal data of comprehensive sensing network; Adopt quantitative flexible strategy normalization algorithm that fused data is analyzed then, and send control command to electrical control module and distributed inverse control system.The host computer application software of said set of regions control centring system adopts OO program developing method exploitation, is made up of major parts such as man-machine interface, control logic and databases.Man-machine interface is used for the demonstration and order transmit operation of each electric equipment operating state in operational environment and the zone.The order that control logic is used for after data fusion and the decision making algorithm produces.Database is used to preserve the daily record of working environment parameter, operating state historical data and variety of event, has the characteristics of trackability.
Power scheduling control centre is a cover 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 integrated systems.Adopt the condition of work parameter and the state of general internet User Datagram Protocol and special intelligent electrical network coding and AES receiving area integrated control system.In data such as the temperature of man-machine interface viewing area integrated control system, solar irradiance, active power, the node voltage that is incorporated into the power networks, power factor, harmonic components.Possess to regional integrated control system and send the power scheduling order, comprise generation outage, quantitatively generating, start generating, quality of power supply feedback etc., be used for the electric power or the operating state of photovoltaic generation in the adjustment region.
At last, it is also to be noted that what more than enumerate only is 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 be thought protection scope of the present invention.
Claims (12)
1. distributed photovoltaic power generation zone integrated control system; It is characterized in that: comprise electric control system, set of regions control centring system and power scheduling control centre in photovoltaic battery array, distributed inverse control system, sensing network, the zone; Said photovoltaic battery array is connected with distributed inverse control system; Distributed inverse control system is connected with set of regions control centring system; Said sensing network is connected with photovoltaic battery array, distributed inverse control system, set of regions control centring system respectively; Electric control system is connected with distributed inverse control system, set of regions control centring system respectively in the said zone, and said set of regions control centring system is connected with city's electrical network, and set of regions control centring system is connected with power scheduling control centre.
2. distributed photovoltaic power generation zone integrated control system according to claim 1; It is characterized in that: be installed on each building top composition multiple unit distributed photovoltaic array in the zone; Each photovoltaic battery array output DC header box of flowing through imports distributed inverse control system, and the operating voltage of distributed photovoltaic array and power output are controlled by distributed inverse control system in real time.
3. distributed photovoltaic power generation zone integrated control system according to claim 1; It is characterized in that: said distributed inverse control system is made up of the corresponding a plurality of inverse control system monomers in photovoltaic battery array unit, and said inverse control system monomer is made up of direct current power inversion module, maximum power point tracking control module, communication module module.
4. like the said distributed photovoltaic power generation of claim 3 zone integrated control system, it is characterized in that: the direct current power inversion module of said inverse control system adopts three-phase transless type mixed type H bridge topological structure.
5. like the said distributed photovoltaic power generation of claim 3 zone integrated control system; It is characterized in that: the maximum power point tracking control module of said inverse control system is made up of two BOOST-BUCK control circuits and the neural reasoning algorithm of adaptive fuzzy; Adopt the ANFI algorithm to draw the optimum operating voltage of photovoltaic cell according to the relation property of working environment parameters such as I-V, P-V characteristic curve and the temperature of photovoltaic cell, solar irradiance, then by the operating voltage of two BOOST-BUCK control circuit modulated in real time photovoltaic cells.
6. like the said distributed photovoltaic power generation of claim 5 zone integrated control system, it is characterized in that: the neural reasoning algorithm of said adaptive fuzzy adopts five layers of ANFI neural network structure of Sugeno fuzzy model based on the fuzzy inference system of adaptive neural network; Form input vector u (V by current voltage, electric current, power, temperature, solar irradiance parameter; I, P, T; R), output f (u) is the optimum operating voltage of maximum power point.
7. like the said distributed photovoltaic power generation of claim 3 zone integrated control system; It is characterized in that: the communication module of said inverse control system adopts fieldbus industrial communication agreement and said set of regions control center to carry out exchanges data; Operating state, voltage, electric current, power factor (PF) and active power parameter are uploaded to said set of regions control center, and accept the order at collection control center.
8. distributed photovoltaic power generation zone integrated control system according to claim 1; It is characterized in that: said sensing network is made up of sensor network and data fusion module; Comprise sets of temperature sensors, solar irradiance sensor groups, Hall current sensor group, Hall voltage sensor groups, frequency sensor group and thermal imagery leakage current sensor group; Said sets of temperature sensors, a day illumination sensor groups are arranged with said photovoltaic battery array on-the-spot, and said Hall current sensor group, Hall voltage sensor groups, frequency sensor group and thermal imagery leakage current sensor group are arranged in the said distributed inversion control; Each sensor die blocks of data of said data fusion module collection also calculates power, power factor (PF), meritorious and reactive power, temperature through Ampere's law, Wien displacement blackbody radiation law, and adopts quantitative flexible strategy normalization algorithm that data are handled and sent and promptly order to on-the-spot.
9. distributed photovoltaic power generation zone integrated control system according to claim 1; It is characterized in that: electric control system is accepted distributed inverse control system provisional orders and the order of set of regions control center in the said zone; Be used to change the operating state of said photovoltaic battery array, distributed inverse control system in the zone, electric installation safety in control generated output, the support area.
10. distributed photovoltaic power generation zone integrated control system according to claim 1 is characterized in that: said set of regions control centring system is compiled electrical module, communication module, data fusion by electric power and is formed with decision making algorithm module and host computer application software.
11. like the said distributed photovoltaic power generation of claim 10 zone integrated control system; It is characterized in that: said electric power compiles electrical module and is made up of transformer, air switch, relay and logic programmable controller; 380 volts of industrial-frequency alternating current parallel connections of distributed inverse control system institute inversion are compiled the access utility grid; Said communication module has two passages of intra-area communication and the outer telecommunication in zone; The intra-area communication passage be used for the zone in distributed inverse control system communicate by letter with sensing network, adopt signal data in the field bus protocol pickup area, and to distributed inversion system, electric control system interdependent node transmitting control commands.The outer telecommunication passage in zone is used for communicating by letter with said power-management centre; Adopt the condition of work and the state of general internet User Datagram Protocol and special intelligent electrical network coding and AES each critical piece in control centre's transfer system; Comprise temperature data, day illumination data, active power, the node voltage that is incorporated into the power networks, power factor, harmonic component etc.; The dispatching command at receiving scheduling center simultaneously is used for the electric power or the operating state of photovoltaic generation in the adjustment region; Said data fusion and decision making algorithm module adopt the sensor Data Fusion of D-S evidence theory and fuzzy mathematics; The signal data of comprehensive sensing network; Adopt quantitative flexible strategy normalization algorithm that fused data is analyzed then, and send control command to electrical control module and distributed inverse control system.Said host computer application software adopts OO program developing method exploitation, has the strong characteristics of good stability extensibility, is made up of major parts such as man-machine interface, control logic and databases.Man-machine interface is used for the demonstration and order transmit operation of each electric equipment operating state in operational environment and the zone.The order that control logic is used for after data fusion and the decision making algorithm produces.Database is used to preserve the daily record of working environment parameter, operating state historical data and variety of event, has the characteristics of trackability.
12. distributed photovoltaic power generation zone integrated control system according to claim 1; It is characterized in that: said power scheduling control centre; Adopt the condition of work parameter and the state of general internet User Datagram Protocol and special intelligent electrical network coding and AES receiving area integrated control system; Temperature, day illumination, active power, the node voltage that is incorporated into the power networks, power factor harmonic component data at man-machine interface viewing area integrated control system; Possess to regional integrated control system and send the power scheduling order, comprise generation outage, quantitatively generating, start generating and quality of power supply feedback, be used for the electric power or the operating state of photovoltaic generation in the adjustment region.
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