CN107294201A - A kind of synchronous generator and energy accumulation current converter analog platform in parallel - Google Patents
A kind of synchronous generator and energy accumulation current converter analog platform in parallel Download PDFInfo
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- CN107294201A CN107294201A CN201710412155.XA CN201710412155A CN107294201A CN 107294201 A CN107294201 A CN 107294201A CN 201710412155 A CN201710412155 A CN 201710412155A CN 107294201 A CN107294201 A CN 107294201A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/08—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems requiring starting of a prime-mover
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H02J3/383—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
A kind of synchronous generator and energy accumulation current converter analog platform in parallel, its output for dragging frequency converter and the connection of dragging motor stator armature winding winding, dragging motor and synchronous generator rotor axle are directly mechanically connected, field power supply connects synchronous generator rotor Exciting Windings for Transverse Differential Protection by exciter, battery is connected with the DC side of energy accumulation current converter, photovoltaic battery panel is connected with the DC side of photovoltaic DC-to-AC converter, the stator winding of synchronous generator, energy accumulation current converter exchanges output with photovoltaic DC-to-AC converter, load is connected to points of common connection, it is connected to again by network distribution transformer on power network.Drag frequency converter, dragging motor, synchronous generator, field power supply simulation Gas Turbine Generating Units electrical characteristic；Energy accumulation current converter and battery are that energy-storage system is used for peak load shifting, aid in frequency modulation and voltage modulation；Photovoltaic battery panel and photovoltaic DC-to-AC converter composition photovoltaic generating system, with synchronous generator, energy accumulation current converter parallel running；Described analog platform receives the scheduling of EMS.
Description
Technical field
The present invention relates to a kind of synchronous generator and energy accumulation current converter analog platform in parallel.
Background technology
Because distributed energy resource system has open flexible advantage, that seeks that various energy resources integrated complementary efficiently utilizes has
Effect approach is increasingly becoming one of energy field sustainable development direction.The cooling heating and power generation system provided multiple forms of energy to complement each other is with it good
The features such as environment friendly, reliability and economy, receives extensive attention.Various energy resources are complementary, can utilize renewable energy
The characteristics of its is unstable is made up while source；The reasonable disposition of system and optimization operation can effectively ensure power supply reliability,
The comprehensive utilization rate of energy source and system economy of micro-capacitance sensor are improved, electrical energy demands is met, realizes that the energy is maximally utilized.
Existing cool and thermal power is provided multiple forms of energy to complement each other gas turbine in system, gas internal-combustion engine, diesel-driven generator, different types of
The equipment costs such as battery are higher, and operation consumption fuel source, cause whole system cost higher, while individual fuel can band
To pollute, therefore initial stage is proved in system schema, provided multiple forms of energy to complement each other system simulation platform in the urgent need to setting up one kind, grasp system steady
Qualitative and operation reserve, to provide multiple forms of energy to complement each other, system entity construction provides theory support.
CN 104578177 A《One kind is provided multiple forms of energy to complement each other electric power system control method for frequency》Only proposed from FREQUENCY CONTROL angle
One kind is provided multiple forms of energy to complement each other electric power system control method for frequency, is not referred to that various energy resources coordinate control, is generated power for their own use and powered for load,
The related control strategies such as remaining electricity online.CN 105305495 A《A kind of multi-energy complementary micro-grid system scheduling method》Propose one
Multi-energy complementary micro-grid system call is planted, the main energy storage characteristic using batteries of electric automobile is powered with wind-solar system complementation, dropped
The cost of investment of low energy storage device, synchronous generator system simulation gas turbine power generation and energy accumulation current converter auxiliary frequency modulation are not referred to
The functions such as pressure regulation.CN 103023035 A《A kind of Optimal Configuration Method of multi-energies hybrid power generating system》A kind of scene is proposed to take out
The capacity for storing multi-energies hybrid power generating system is distributed rationally, does not refer to that various energy resources complemental power-generation optimized operation controls related content.
The content of the invention
The purpose of the present invention is gas turbine, gas internal-combustion engine, the bavin provided multiple forms of energy to complement each other for existing cool and thermal power in system
The equipment costs such as fry dried food ingredients motor, different types of battery are higher, and operation consumption fuel source, cause whole system cost compared with
Height, while individual fuel can bring pollution, builds a kind of synchronous generator and energy accumulation current converter analog platform in parallel, simulates cold and hot
The electrical characteristic of the generating set such as gas turbine, gas internal-combustion engine, diesel-driven generator in chp system, while research and energy storage
Current transformer, photovoltaic generating system generator operation characteristic in parallel and stability, are provided for cool and thermal power system entity construction of providing multiple forms of energy to complement each other
Theory support and guidance.
Technical scheme is as follows：
Synchronous generator and energy accumulation current converter of the present invention analog platform in parallel it is main by dragging frequency converter, it is dragging motor, same
Walk generator, field power supply, energy accumulation current converter, battery, photovoltaic battery panel, photovoltaic DC-to-AC converter, load, EMS group
Into.The wherein output of dragging frequency converter and the connection of dragging motor stator armature winding winding, dragging motor and synchronous generator turn
Sub- axle is directly mechanically connected, and field power supply connects synchronous generator rotor Exciting Windings for Transverse Differential Protection by exciter, and battery and energy storage become
The DC side for flowing device is connected, and photovoltaic battery panel is connected with the DC side of photovoltaic DC-to-AC converter, the stator winding of synchronous generator, energy storage
Current transformer is together connected to points of common connection with the exchange output, load of photovoltaic DC-to-AC converter, then is connected to by network distribution transformer
On power network.In order to avoid dragging frequency converter is to whole analog platform harmonic in parallel, the friendship of dragging frequency converter and field power supply
Stream side is connected on power network by isolating transformer.Synchronous generator, energy accumulation current converter, photovoltaic DC-to-AC converter, battery, load lead to
Cross Ethernet or 485 connections are connected with the communication interface of EMS.Wherein dragging frequency converter, dragging motor, synchronization
Generator, field power supply are used for the electrical characteristic for simulating Gas Turbine Generating Units；Energy accumulation current converter and battery are energy storage system
System, for peak load shifting, while aiding in frequency modulation and voltage modulation；Photovoltaic battery panel and photovoltaic DC-to-AC converter composition photovoltaic generating system, it is and same
Walk generator, energy accumulation current converter parallel running；Whole parallel connection analog platform receives EMS scheduling, is powered to load,
Satisfaction is generated power for their own use, the demand of remaining electricity online.
Analog platform operational mode of the present invention is broadly divided into grid-connected and isolated network both of which.During grid-connect mode, the present invention is simultaneously
Join analog platform from power network power taking, drag Frequency Converter Control dragging motor, control synchronous generator is incorporated into the power networks, and is synchronous generator
Machine provides torque input, and active power of output when grid-connected, field power supply regulation synchronous generator stator electromotive force is adjusted when grid-connected
Reactive power；Energy accumulation current converter is run with PQ control models, is charged a battery；It is photovoltaic DC-to-AC converter and energy accumulation current converter, synchronous
Parallel operation of generator, is generated electricity by way of merging two or more grid systems with PQ control models.During isolated network pattern, Frequency Converter Control dragging motor, the synchronous hair of control are dragged
Motor speed, stable parallel connection analog platform frequency, field power supply regulating system voltage magnitude.Synchronous generator is used as voltage source group
Network operation, sets up points of common connection node voltage；Energy accumulation current converter is in parallel with synchronous generator, is transported with PQ droop controls pattern
OK, to accumulator cell charging and discharging, frequency modulation and voltage modulation is aided in.Photovoltaic DC-to-AC converter is in parallel with energy accumulation current converter, synchronous generator, with PQ controls
Pattern is generated electricity by way of merging two or more grid systems.
The operational mode of the present invention is specific as follows：
Synchronous generator and energy accumulation current converter analog platform in parallel are in grid-connect mode, and preferential photovoltaic system is supplied to load
Electricity, when photovoltaic system is unsatisfactory for workload demand, then contrasts fuel price and power network electricity price, chooses whether to start synchronous generator system
System, while considering battery condition, if having been filled with.
When photovoltaic power generation quantity is unsatisfactory for workload demand, when fuel cost is less than power network electricity price, start synchronous generator system
System generates electricity.Now, when battery is in underfill electricity condition, energy accumulation current converter power taking from system charges a battery, filled
Man Hou, energy accumulation current converter is standby, unnecessary electricity online；When battery, which is in, is full of electricity condition, energy accumulation current converter is standby, unnecessary
Electricity is surfed the Net.When fuel cost is higher than power network electricity price, then synchronous generator system is not run, and present invention parallel connection analog platform is from electricity
Net power taking is powered to load.Now, when battery is in underfill electricity condition, energy accumulation current converter power taking from power network, to electric power storage
Pond is charged, standby full of rear energy accumulation current converter；When battery, which is in, is full of electricity condition, energy accumulation current converter is standby.
When photovoltaic power generation quantity meets workload demand, when fuel cost is less than power network electricity price, start synchronous generator system
Generate electricity.Now, when battery is in underfill electricity condition, energy accumulation current converter power taking from analog platform in parallel, to battery
Charging, unnecessary electricity online standby full of rear energy accumulation current converter.When battery, which is in, is full of electricity condition, energy accumulation current converter is treated
Machine, unnecessary electricity online.When fuel cost is higher than power network electricity price, then synchronous generator system is not run.Now, battery is in
During underfill electricity condition, energy accumulation current converter power taking from power network charges a battery, standby full of rear energy accumulation current converter.Work as storage
When battery is in full of electricity condition, energy accumulation current converter is standby.
When synchronous generator and energy accumulation current converter analog platform isolated network pattern in parallel, synchronous generator networking, set up voltage,
Frequency；Consider whether battery condition is sufficient, start energy accumulation current converter auxiliary frequency modulation and voltage modulation, while being powered to load.Examine simultaneously
Whether sufficient consider sunlight, start photovoltaic system and powered to load.
When accumulator electric-quantity is sufficient, energy accumulation current converter entry condition, energy accumulation current converter auxiliary frequency modulation and voltage modulation, to load are met
Power supply.When sunny, photovoltaic generating system startup optimization is preferentially powered to load, while the electricity of battery is supplemented, electricity
After pond is fully charged, photovoltaic system limit Power operation, synchronous generator system limit Power operation.When sunlight is inadequate, photovoltaic hair
Electric system is standby.
When accumulator electric-quantity is inadequate, energy accumulation current converter entry condition is unsatisfactory for, energy accumulation current converter is standby.When sunlight fills
When sufficient, photovoltaic generating system startup optimization is preferentially powered to load, while supplementing the electricity of battery, after battery is fully charged, light
Volt system limits Power operation, synchronous generator system limit Power operation.When sunlight is inadequate, photovoltaic generating system is standby, this
When only have synchronous generator system to be powered to load.
Described synchronous generator system, it drags Frequency Converter Control dragging motor, provides torque for synchronous generator defeated
Enter, active power of output when grid-connected, synchronous generator rotating speed, stable microgrid frequency are controlled during isolated network；Field power supply regulation is synchronous
Generator unit stator electromotive force, adjusts reactive power when grid-connected, microgrid voltage magnitude is adjusted during isolated network.
Described energy accumulation current converter is according to the difference of analog platform operational mode in parallel, and its control model is different.When
When grid-connect mode is run, run with PQ control models；When isolated power grid pattern, with PQ droop control mode operations.
Described photovoltaic DC-to-AC converter is in parallel with energy accumulation current converter, synchronous generator, is generated electricity by way of merging two or more grid systems with PQ control models.
Brief description of the drawings
Fig. 1 analog platform system entire block diagrams of the present invention；
Fig. 2 energy accumulation current converter control flow charts；
Fig. 3 energy accumulation current converter PQ droop control device control block diagrams；
Fig. 4 system control process figures.
Embodiment
The present invention is described further with reference to the accompanying drawings and detailed description.
As shown in figure 1, the synchronous generator and energy accumulation current converter of the present invention analog platform composition in parallel are as follows：
Described analog platform is by power network, isolating transformer, network distribution transformer, synchronous generator system 101, energy-storage system
102nd, photovoltaic generating system 103, load 104, and EMS 105 are constituted.
Described synchronous generator system 101 includes dragging frequency converter, dragging motor, synchronous generator and field power supply,
The wherein output of dragging frequency converter and the connection of dragging motor stator armature winding winding, dragging motor and synchronous generator rotor axle
Directly mechanically connect, field power supply connects synchronous generator rotor Exciting Windings for Transverse Differential Protection by exciter, for simulating gas turbine, combustion
The electrical characteristic of the generating sets such as gas internal combustion engine, diesel-driven generator.Wherein dragging frequency converter can use AC/DC, DC/AC converters etc.
Effect simulation, controls dragging motor, and torque input is provided for synchronous generator, and active power of output when grid-connected is controlled same during isolated network
Walk generator speed, systems stabilisation frequency；Field power supply can use AC/DC equivalent simulations, adjust synchronous generator stator electromotive force,
Reactive power is adjusted when grid-connected, regulating system voltage magnitude during isolated network.The Booting sequence of synchronous generator system 101 is substantially first
Start field power supply, then start dragging frequency converter, dragging dragging motor operation, band engine alternator generator operation.
Energy-storage system 102 includes energy accumulation current converter and battery, and wherein the DC side of energy accumulation current converter and battery is defeated
Go out side connection, for peak load shifting, while aiding in frequency modulation and voltage modulation.From the equation of rotor motion of synchronous generator, work as generating
When machine electromotive power output is more than the mechanical output that prime mover is inputted, generator speed can decline, and then Generator Governor is surveyed
Generator speed decline is measured, starts action, increases the energy input of prime mover, alternator speed is returned to rated value.When
Parallel connection analog platform of the invention is in when being incorporated into the power networks pattern, due to analog platform and power network connection in parallel of the invention, to synchronization
The response characteristic requirement of generator is not especially high.When analog platform in parallel of the invention is in isolated power grid pattern, synchronous hair
Motor is as voltage source networking, it is necessary to which synchronous generator quickly sets up the voltage and frequency of stabilization.And now due to synchronous generator
The Exciting Windings for Transverse Differential Protection inertia of machine is larger, and governing speed is slower, therefore generator speed returns to rated value and has prolonging for certain time
Late, now energy accumulation current converter can do Auxiliary support.
Photovoltaic generating system 103 includes photovoltaic battery panel and photovoltaic DC-to-AC converter, the wherein output of photovoltaic battery panel and photovoltaic
The DC side connection of inverter, the photovoltaic generating system and synchronous generator, energy accumulation current converter parallel running.Whole simulation in parallel
Platform is powered by the United Dispatching of EMS 105 to load 104.
Fig. 2 is energy accumulation current converter control flow chart, as shown in Figure 2：
Energy accumulation current converter assist in synchronization generator frequency modulation and voltage modulation is controlled, and it is 0.03Hz to define FREQUENCY CONTROL dead time.When
The frequency f set up when synchronous generator is as voltage source networking is in dead time, i.e. during 49.97Hz≤f≤50.03Hz,
Now energy accumulation current converter is responsible for, to accumulator cell charging and discharging, being not involved in frequency modulation and voltage modulation, is run using PQ control models；Work as synchronous generator
The frequency f that machine is set up exceeds dead zone range, i.e. 47Hz≤f<49.97Hz, 50.03Hz<During f≤52Hz, energy accumulation current converter is adopted
With PQ droop control mode operations, it is responsible for auxiliary frequency modulation and voltage modulation.
Described PQ control models, are conventional active reactive control；PQ droop controls can be realized by Fig. 3.Such as Fig. 3 institutes
Show, wherein alternating voltage V is measured by voltage sensor, frequency f is obtained by phaselocked loop.Pass through drop wire relational expression Pref=P0+Kpf
(f0- f) and Qref=Q0+Kpv(V0- V), obtain active power set-point PrefWith reactive power set-point Qref.According to active reactive
Decoupling Theory, respectively obtains dq shaft current set-points idref, iqref, it is used as the given of current inner loop.Wherein P0And Q0To be active and
The rated value of reactive power, V0And f0For voltage and the rated value of frequency.
Fig. 4 is control flow chart of the EMS to whole system, as shown in Figure 4：
The analog platform operational mode of the present invention is broadly divided into grid-connected and isolated network both of which.During grid-connect mode, simulation is flat
Platform is incorporated into the power networks from power network power taking, dragging motor dragging synchronous generator；Energy accumulation current converter is run with PQ control models, from power network
Or power taking in analog platform, the battery charging to energy-storage system 102；The photovoltaic battery panel of photovoltaic generating system 103 passes through light
Volt inverter is generated electricity by way of merging two or more grid systems in maximal power tracing mode.
During isolated network pattern, synchronous generator sets up points of common connection node voltage as voltage source group net operation, while and
The photovoltaic DC-to-AC converter parallel running of energy accumulation current converter, photovoltaic generating system 103；Energy accumulation current converter is transported with PQ droop controls pattern
OK, the accumulator cell charging and discharging to energy-storage system 102, aids in frequency modulation and voltage modulation；The photovoltaic battery panel of photovoltaic generating system 103 passes through light
Lie prostrate inverter to generate electricity, powered to load.
Specific control process is as follows：
Synchronous generator and energy accumulation current converter analog platform in parallel are in grid-connect mode, and preferential photovoltaic system 103 gives load
Power supply, when photovoltaic system 103 is unsatisfactory for workload demand, then contrasts fuel price and power network electricity price, chooses whether to start synchronous hair
Electric system, while considering whether battery condition has been filled with.
When the generated energy of photovoltaic system 103 is unsatisfactory for workload demand, when fuel cost is less than power network electricity price, start synchronous
Generator system generates electricity.Now, when battery is in underfill electricity condition, energy accumulation current converter power taking from analog platform is given
Battery charges, and after being full of, energy accumulation current converter is standby, unnecessary electricity online；When battery, which is in, is full of electricity condition, energy storage becomes
Flow device standby, unnecessary electricity online.When fuel cost is higher than power network electricity price, then synchronous generator system is not run, analog platform
Powered from power network power taking to load.Now, when battery is in underfill electricity condition, energy accumulation current converter power taking from power network is given
Battery charges, standby full of rear energy accumulation current converter；When battery, which is in, is full of electricity condition, energy accumulation current converter is standby.
When the generated energy of photovoltaic system 103 meets workload demand, when fuel cost is less than power network electricity price, start synchronous hair
Electric system generates electricity.Now, when battery is in underfill electricity condition, energy accumulation current converter power taking from analog platform, to storage
Battery charges, standby full of rear energy accumulation current converter, unnecessary electricity online.When battery, which is in, is full of electricity condition, energy storage unsteady flow
Device is standby, unnecessary electricity online.When fuel cost is higher than power network electricity price, then synchronous generator system is not run.Now, battery
During in underfill electricity condition, energy accumulation current converter power taking from power network charges a battery, standby full of rear energy accumulation current converter.
When battery, which is in, is full of electricity condition, energy accumulation current converter is standby.
When synchronous generator and PCS analog platforms in parallel are in isolated network pattern, system electricity is set up in synchronous generator networking
Pressure, frequency；Consider whether battery condition is sufficient, start energy accumulation current converter auxiliary frequency modulation and voltage modulation, while being powered to load.Simultaneously
Consider whether sunlight is sufficient, start photovoltaic system and powered to load.
When accumulator electric-quantity is sufficient, energy accumulation current converter entry condition, energy accumulation current converter auxiliary frequency modulation and voltage modulation, to load are met
Power supply.When sunny, photovoltaic generating system startup optimization is preferentially powered to load, while the electricity of battery is supplemented, electricity
After pond is fully charged, photovoltaic system limit Power operation, synchronous generator system limit Power operation.When sunlight is inadequate, photovoltaic hair
Electric system is standby.
When accumulator electric-quantity is inadequate, energy accumulation current converter entry condition is unsatisfactory for, energy accumulation current converter is standby.When sunlight fills
When sufficient, the startup optimization of photovoltaic generating system 103 is preferentially powered to load, while supplementing the electricity of battery, battery is fully charged
Afterwards, the limit of photovoltaic system 103 Power operation, synchronous generator system limit Power operation.When sunlight is inadequate, photovoltaic generating system
103 is standby, and now only synchronous generator system is powered to load.
Claims (5)
1. a kind of synchronous generator and energy accumulation current converter analog platform in parallel, it is characterized in that：Described analog platform is become by dragging
It is frequency device, dragging motor, synchronous generator, field power supply, energy accumulation current converter, battery, photovoltaic battery panel, photovoltaic DC-to-AC converter, negative
Lotus and EMS composition；The wherein output of dragging frequency converter and the connection of dragging motor stator armature winding, dragging motor
Directly mechanically connected with synchronous generator rotor axle, field power supply connects synchronous generator rotor Exciting Windings for Transverse Differential Protection by exciter,
Battery is connected with the DC side of energy accumulation current converter, and photovoltaic battery panel is connected with the DC side of photovoltaic DC-to-AC converter, synchronous generator
Stator winding, the exchange output, load of energy accumulation current converter and photovoltaic DC-to-AC converter be together connected to points of common connection, then by with
Net transformer is connected on power network；Synchronous generator, energy accumulation current converter, photovoltaic DC-to-AC converter, battery, load by Ethernet or
485 connections are connected with the communication interface of EMS；Described dragging frequency converter, dragging motor, synchronous generator, encourage
Magnetoelectricity source is used to simulate the generating set electrical characteristic such as gas turbine, gas internal-combustion engine, diesel-driven generator；Energy accumulation current converter and storage
Battery is energy-storage system, for peak load shifting, while aiding in frequency modulation and voltage modulation；Photovoltaic battery panel and photovoltaic DC-to-AC converter composition photovoltaic hair
Electric system, with synchronous generator, energy accumulation current converter parallel running；Whole parallel connection analog platform receives EMS scheduling,
Powered to load, satisfaction is generated power for their own use, remaining electric online demand.
2. synchronous generator according to claim 1 and energy accumulation current converter analog platform in parallel, it is characterized in that：It is described and
When joining analog platform grid-connect mode, preferential photovoltaic system is powered to load, when photovoltaic system is unsatisfactory for workload demand, then contrasts combustion
Expect price and power network electricity price, choose whether to start synchronous generator system, while considering whether battery condition has been filled with；Work as light
When volt generated energy is unsatisfactory for workload demand, when fuel cost is less than power network electricity price, starts synchronous generator system and generate electricity；Now,
When battery is in underfill electricity condition, energy accumulation current converter power taking from analog platform in parallel charges a battery, is full of
Afterwards, energy accumulation current converter is standby, unnecessary electricity online；When battery, which is in, is full of electricity condition, energy accumulation current converter is standby, unnecessary electricity
Amount online；When fuel cost is higher than power network electricity price, then synchronous generator system is not run, and analog platform is from power network power taking to load
Power supply；Now, when battery is in underfill electricity condition, energy accumulation current converter power taking from power network charges a battery, after being full of
Energy accumulation current converter is standby；When battery, which is in, is full of electricity condition, energy accumulation current converter is standby；
When photovoltaic power generation quantity meets workload demand, when fuel cost is less than power network electricity price, starts synchronous generator system and generate electricity；
Now, when battery is in underfill electricity condition, energy accumulation current converter power taking from analog platform charges a battery, is full of
Energy accumulation current converter is standby afterwards, unnecessary electricity online；When battery, which is in, is full of electricity condition, energy accumulation current converter is standby, unnecessary electricity
Amount online；When fuel cost is higher than power network electricity price, then synchronous generator system is not run；Now, battery is in underfill electricity
During state, energy accumulation current converter power taking from power network charges a battery, standby full of rear energy accumulation current converter；When battery is in
During full of electricity condition, energy accumulation current converter is standby.
3. synchronous generator according to claim 1 and energy accumulation current converter analog platform in parallel, it is characterized in that：Isolated network pattern
When, system voltage, frequency are set up in synchronous generator networking；Consider whether battery condition is sufficient, start energy accumulation current converter auxiliary
Frequency modulation and voltage modulation, while being powered to load；Consider whether sunlight is sufficient simultaneously, start photovoltaic system and powered to load；
When accumulator electric-quantity is sufficient, energy accumulation current converter entry condition is met, energy accumulation current converter auxiliary frequency modulation and voltage modulation is supplied to load
Electricity；When sunny, photovoltaic generating system startup optimization is preferentially powered to load, while supplementing the electricity of battery, electric power storage
After pond is fully charged, photovoltaic system limit Power operation, synchronous generator system limit Power operation；When sunlight is inadequate, photovoltaic hair
Electric system is standby；
When accumulator electric-quantity is inadequate, energy accumulation current converter entry condition is unsatisfactory for, energy accumulation current converter is standby；When sunny
When, photovoltaic generating system startup optimization is preferentially powered to load, while supplementing the electricity of battery, after battery is fully charged, photovoltaic
System limits Power operation, synchronous generator system limit Power operation；When sunlight is inadequate, photovoltaic generating system is standby, now
Only synchronous generator system is powered to load.
4. synchronous generator according to claim 1 and energy accumulation current converter analog platform in parallel, it is characterized in that：Described is same
The dragging Frequency Converter Control dragging motor of generator system is walked, torque input is provided for synchronous generator, is exported when grid-connected active
Power, controls synchronous generator rotating speed, systems stabilisation frequency during isolated network；Field power supply adjusts synchronous generator stator electromotive force,
Reactive power is adjusted when grid-connected, regulating system voltage magnitude during isolated network.
5. synchronous generator according to claim 1 and energy accumulation current converter analog platform in parallel, it is characterized in that：Described storage
Energy current transformer uses different control models according to the difference of analog platform operational mode, when grid-connect mode is run, is controlled with PQ
Mode operation processed；When isolated power grid pattern, with PQ droop control mode operations.
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