CN103151799A - Microgrid power supply system and control method thereof - Google Patents
Microgrid power supply system and control method thereof Download PDFInfo
- Publication number
- CN103151799A CN103151799A CN2013101091395A CN201310109139A CN103151799A CN 103151799 A CN103151799 A CN 103151799A CN 2013101091395 A CN2013101091395 A CN 2013101091395A CN 201310109139 A CN201310109139 A CN 201310109139A CN 103151799 A CN103151799 A CN 103151799A
- Authority
- CN
- China
- Prior art keywords
- circuit
- generator
- battery pack
- controller
- battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/14—District level solutions, i.e. local energy networks
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a microgrid power supply system and a control method thereof. The system comprises a generator, a rectification circuit, a DC (Direct Current)/DC circuit, a charging circuit, a battery pack working mode control circuit, a battery pack, an inversion circuit, a power distribution bus bar and a controller and further comprises a monitoring protection and metering circuit I, a monitoring protection and metering circuit II, a power factor compensation circuit and a battery pack monitoring protection circuit. The microgrid power supply system can work in a grid-connected state, also can realize off-grid power supply, and can be used for effectively combining a solar generator, a stand-by generator and a battery pack to realize reliable and continuous power supply.
Description
Technical field
The present invention relates to a kind of micro-mains supply system and control method.
Background technology
At present, energy-saving and emission-reduction have become the focus of social concerns, wherein solar energy and wind energy are owing to having resource abundance, clean, widely distributed characteristics, make its application more and more extensive, there are the following problems to utilize the electric power system of solar energy and wind energy in prior art: 1, do not contain there is the solar light-heat power-generation system, AC power that wind generator system, diesel power generation system and combustion gas Stirling electricity generation system etc. are sent solves from net, grid-connected supply problem; 2, when adopting solar energy Stirling engine or the generating of combustion type Stirling engine, when the energy of input Stirling engine increases, if the energy of increase can not be transformed into smoothly to power delivery to electrical network, the rotating speed of Stirling engine meeting fast rise, cause system generating frequency unstable; 3, power supply that alternating current power-generating system sends is all become to DC power supply through rectifying device and be stored in storage battery, cause electric power system very large to the capacity requirement of storage battery, improved system cost; 4, the frequency of alternating current power-generating system power supply needs to control; 5, adopt the conversion of AC-DC-interchange, reduced system effectiveness; 6, the process complexity of existing control of power supply system accumulator cell charging and discharging.
Summary of the invention
The present invention is directed to the proposition of above problem, and develop a kind of both can be operated in and net state, also can realize can effectively in conjunction with solar generator, stand-by generator and battery cohort, realizing micro-mains supply system and the control method of reliable continued power from the net power supply.
Technological means of the present invention is as follows:
A kind of micro-mains supply system comprises:
Generator;
Connect generator by distribution bus, for generator output AC electricity is transformed to galvanic rectification circuit;
Connect rectification circuit, for rectification circuit output direct current being carried out to the DC/DC circuit of voltage transformation;
Connect the DC/DC circuit and connect the battery cohort by battery cohort working mode control circuit, for the charging circuit that utilizes DC/DC circuit output direct current to be charged to the battery pack that is operated in charge mode;
Connect controller and battery cohort, set the battery cohort working mode control circuit of battery pack mode of operation for the state of charge according to battery pack; Described battery pack mode of operation comprises charge mode, powering mode and standby mode;
The battery cohort with at least three battery pack be connected with battery cohort working mode control circuit;
Connect the battery cohort by battery cohort working mode control circuit, the direct current of the battery pack output that is powering mode for mode of operation that battery cohort working mode control circuit is set carries out after alternating current that inversion is fixed frequency transferring to the inverter circuit of distribution bus;
Distribution bus; Described distribution bus connects respectively electric energy user and electrical network interface, for providing power load to the electric energy user under net state and also under net state, utilizing the electrical network interface to be switched on or switched off electrical network;
Connect respectively rectification circuit, the DC/DC circuit, charging circuit, battery cohort working mode control circuit and inverter circuit, the alternating current that the charge mode setting signal control rectification circuit sended over according to battery cohort working mode control circuit transmits distribution bus carries out rectification, control DC/DC circuit carries out voltage transformation to the direct current of rectification circuit output, controlling charging circuit utilizes the direct voltage of DC/DC circuit output to be charged to the battery pack that is operated in charge mode, the powering mode setting signal that sends over according to battery cohort working mode control circuit is controlled the alternating current that inverter circuit is fixed frequency to the DC inverter of the battery pack output that is operated in powering mode and is transferred to the controller of distribution bus,
In addition, also comprise:
Connect generator, for monitoring the generator operating state and being protected according to the generator abnormal work state monitored, and monitoring and protection and the metering circuit I of metering generator output electric weight; Connection electric energy user or electrical network interface, for monitoring electrical network or power load operation and being protected according to the electrical network or the power load abnormal operating condition that monitor, and monitoring and protection and the metering circuit II of metering electrical network power consumption or power load variation;
Connect generator and controller, for the control signal according to controller, generator is carried out to reactive power compensation, the generator power factor is adjusted to the power factor compensation circuit of set point;
Connect battery cohort and controller, have each battery pack the state of charge observation circuit and anti-overcharge, prevented putting, the state of charge of anti-overvoltage, anti-under-voltage, anti-overheated, antioverloading, anti-reverse safety protective circuit each battery pack that will monitor feeds back to the battery pack monitoring and protecting circuit of controller;
Further, described generator comprises solar generator and the stand-by generator be connected with controller respectively; Described stand-by generator be wind-driven generator, combustion type stirling generator and diesel engine generator at least one, solar generator or stand-by generator that the alternating current that controller utilizes distribution bus to transmit according to current line of radiation intensity selection starts are generated electricity, and according to the fixed frequency of inverter output AC electricity, control generator frequency; Described solar generator is solar energy Stirling generator or Bretton generator;
Further, described controller also connects respectively monitoring and protection and metering circuit I, power factor compensation circuit, monitoring and protection and metering circuit II and battery pack monitoring and protecting circuit, for judging whether generator power output that monitoring and protection and metering circuit I transmit is greater than electrical network that monitoring and protection and metering circuit II transmit or electric energy user's power consumption, and the battery pack of setting an electric weight deficiency by battery cohort working mode control circuit when energy output is greater than power consumption under net state is operated in charge mode and controls the alternating current that rectification circuit transmits distribution bus and carry out rectification, control DC/DC circuit carries out voltage transformation to the direct current of rectification circuit output, controlling charging circuit utilizes the direct voltage of DC/DC circuit output to be charged to the battery pack that is operated in charge mode, setting by battery cohort working mode control circuit battery pack that an electric weight is full of when energy output is less than power consumption under net state is operated in powering mode and controls the alternating current that inverter circuit is fixed frequency to the DC inverter of the battery pack output that is operated in powering mode and transfer to distribution bus, and power ratio control factor compensation circuit carries out reactive power compensation to generator, the generator power factor is adjusted to set point,
Further, and can reduce the battery capacity of battery pack under net state.
A kind of control method of micro-mains supply system, comprise the steps:
S1: the state of charge of each battery pack of battery pack monitoring and protecting circuit Real-Time Monitoring battery cohort changes and is transferred to controller, controller is set by battery cohort working mode control circuit the battery pack that an electric weight is full of and is operated in powering mode, battery cohort working mode control circuit is sent to controller by the powering mode setting signal simultaneously, carries out S2;
S2: the alternating current that the DC inverter that controller control inverter circuit is exported the battery pack that is operated in powering mode is fixed frequency also is transferred to generator by distribution bus, and described generator comprises solar generator and stand-by generator; Described stand-by generator be wind-driven generator, combustion type stirling generator and diesel engine generator at least one; Carry out S3;
S3: the generator that the AC power that controller will utilize distribution bus to transmit according to current direct solar radiation intensity selection starts, when direct solar radiation intensity reaches set point, the generating of selection solar generator, when direct solar radiation intensity does not reach set point, the generating of selection stand-by generator, carry out S4;
S4: the generator generating after startup is sent alternating current by distribution bus by it and is utilized the electrical network interface to be transferred to electrical network or provide power load to the electric energy user, the energy output of monitoring and protection and metering circuit I real time measure generator also is transferred to controller, monitoring and protection and metering circuit II real time measure electrical network or electric energy user's power consumption also is transferred to controller, carries out S5;
S5: the controller judgement, when whether energy output under net state is greater than power consumption, is to carry out S6, otherwise carries out S7;
S6: the battery pack that controller is set an electric weight deficiency by battery cohort working mode control circuit is operated in charge mode, simultaneously battery cohort working mode control circuit is sent to controller by the charge mode setting signal, and controller is controlled the alternating current that rectification circuit transmits distribution bus and carried out rectification, controls the DC/DC circuit direct current of rectification circuit output is carried out voltage transformation, controls charging circuit and utilize the direct voltage of DC/DC circuit output to be charged to the battery pack that is operated in charge mode;
S7: controller is set by battery cohort working mode control circuit the battery pack that an electric weight is full of and is operated in powering mode, the battery pack working mode control circuit is sent to controller by the powering mode setting signal simultaneously, and the alternating current that the DC inverter that controller control inverter circuit is exported the battery pack that is operated in powering mode is fixed frequency also transfers to the supplementary power consumption of distribution bus and is transferred to stand-by generator by distribution bus;
In addition, also have S8, controller power ratio control factor compensation circuit carries out reactive power compensation to generator, and the generator power factor is adjusted to set point;
In addition, also have S9, controller is regulated the charging current of the battery pack that is operated in charge mode by the output current of controlling the DC/DC circuit;
In addition, also there is S10, battery pack monitoring and protecting circuit changes according to the state of charge of each battery pack of monitoring, and when occur arbitrary battery pack overcharge, cross put, when overvoltage, under-voltage, overheated, overload and reversal connection, start anti-overcharge, prevented putting, anti-overvoltage, anti-under-voltage, anti-overheated, antioverloading and anti-reverse safety protective circuit;
In addition, also there is S11, under net state and described generator while being solar energy Stirling generator or combustion type stirling generator, battery cohort working mode control circuit set battery pack that an electric weight is full of be operated in powering mode keep arbitrary moment battery cohort continue the transmission direct current to the output fixed frequency inverter circuit to distribution bus.
Owing to having adopted technique scheme, a kind of micro-mains supply system provided by the invention and control method, both can pass through by generator, monitoring and protection and metering circuit I, power factor compensation circuit, distribution bus, monitoring and protection and metering circuit II and electrical network interface form and net state under supply path make this system works and net state, also can utilize by generator, monitoring and protection and metering circuit I, power factor compensation circuit, distribution bus, monitoring and protection and metering circuit II and power load formation realize powering from net of this system from the supply path under net state, the problem of having avoided existing electric power system must adopt the conversion of AC-DC-interchange to cause system effectiveness to reduce, generator comprises solar generator and stand-by generator simultaneously, wherein stand-by generator is wind-driven generator, combustion type stirling generator and diesel engine generator at least one, solar energy and wind energy have been effectively utilized, again can be at solar generator, when wind-driven generator can not generate electricity, adopting combustion type stirling generator or diesel engine generator is the reliable continued power of micro-grid system, guaranteed that this system can take full advantage of solar energy for the electrical network covering area is arranged, wind energy resources, can be for do not have chlamydate outlying district at electrical network yet, the zones such as island away from continent, by solar energy resources, wind energy becomes electric energy, make full use of the natural resources and promote the well-being of mankind, pass through by generator in addition, monitoring and protection and metering circuit I, power factor compensation circuit, distribution bus, rectification circuit, the DC/DC circuit, charging circuit, battery cohort working mode control circuit and battery cohort form battery cohort charge path and realize the charging of battery cohort, utilization is by the battery cohort, battery cohort working mode control circuit, inverter circuit, the battery cohort supply path that distribution bus forms takes full advantage of the battery cohort, for distribution bus provides the alternating current of stabilized frequency, guaranteed the stable operation of this system, the state of charge of the present invention by each battery pack of battery pack monitoring and protecting circuit Real-Time Monitoring battery cohort changes and is transferred to controller, controller is set the mode of operation of battery cohort by battery cohort working mode control circuit, control the interlock circuit action on supply path or charge path with Time Controller, and battery pack monitoring and protecting circuit has anti-overcharge, prevented putting, anti-overvoltage, anti-under-voltage, anti-overcharge, prevented putting, anti-overheated, the battery pack monitoring and protecting circuit of antioverloading and anti-reverse etc. safety protective circuit, safe and reliable, process is simple, and overcharge or charge less avoiding when be greater than the power consumption Time Controller regulates the battery pack that is operated in charge mode charging current by the output current of controlling the DC/DC circuit from energy output under net state, solved the problem of the process complexity of existing control of power supply system accumulator cell charging and discharging, in addition, power factor compensation circuit carries out reactive power compensation to generator, the generator power factor is adjusted to set point, the AC power of the fixed frequency of simultaneously utilizing the power supply of battery cohort to provide through inverter circuit, can stablize the rotating speed of Stirling engine, like this, when the solar generator in this system adopts solar energy Stirling generator and standby combustion type stirling generator, can overcome the fixed drawback of Stirling engine rotary speed unstabilization, simultaneously, the supply path of this system is unobstructed, guarantee that the electric energy that generator sends can be smoothly through System Dependent path arrival user or electrical network, also can play the effect that maintains system stable operation, and controller is controlled generator frequency according to the fixed frequency of inverter output AC electricity, solved the problem that the frequency of existing alternating current power-generating system power supply need to be controlled, the present invention can be contained solar power system, wind generator system, combustion type Stirling electricity generation system and diesel power generation system, solved from net and grid-connected AC power supply problem, the energy output of generator utilizes the electrical network interface directly to be connected to the grid by distribution bus or directly provides power load to the electric energy user, if be greater than power consumption from energy output under net state, dump energy is offered to the charging of battery cohort, having avoided existing alternating current power-generating system that sent power supply is all become to DC power supply through rectifying device is stored in storage battery, cause electric power system very large to the capacity requirement of storage battery, improved the problem of system cost, feature richness of the present invention, easy to use, be applicable to micro-grid system and extensively promote.
The accompanying drawing explanation
Fig. 1 is the structured flowchart of system of the present invention;
Fig. 2 is the flow chart of control method of the present invention.
Embodiment
A kind of micro-mains supply system as shown in Figure 1, comprising: generator, connect generator by distribution bus, for generator output AC electricity is transformed to galvanic rectification circuit, connect rectification circuit, for rectification circuit output direct current being carried out to the DC/DC circuit of voltage transformation, connect the DC/DC circuit and connect the battery cohort by battery cohort working mode control circuit, for the charging circuit that utilizes DC/DC circuit output direct current to be charged to the battery pack that is operated in charge mode, connect controller and battery cohort, set the battery cohort working mode control circuit of battery pack mode of operation for the state of charge according to battery pack, described battery pack mode of operation comprises charge mode, powering mode and standby mode, the battery cohort with at least three battery pack be connected with battery cohort working mode control circuit, connect the battery cohort by battery cohort working mode control circuit, the direct current of the battery pack output that is powering mode for mode of operation that battery cohort working mode control circuit is set carries out after alternating current that inversion is fixed frequency transferring to the inverter circuit of distribution bus, distribution bus, described distribution bus connects respectively electric energy user and electrical network interface, for providing power load to the electric energy user under net state and also under net state, utilizing the electrical network interface to be switched on or switched off electrical network, connect respectively rectification circuit, the DC/DC circuit, charging circuit, battery cohort working mode control circuit and inverter circuit, the alternating current that the charge mode setting signal control rectification circuit sended over according to battery cohort working mode control circuit transmits distribution bus carries out rectification, control DC/DC circuit carries out voltage transformation to the direct current of rectification circuit output, controlling charging circuit utilizes the direct voltage of DC/DC circuit output to be charged to the battery pack that is operated in charge mode, the powering mode setting signal that sends over according to battery cohort working mode control circuit is controlled the alternating current that inverter circuit is fixed frequency to the DC inverter of the battery pack output that is operated in powering mode and is transferred to the controller of distribution bus, in addition, also comprise: connect generator, for monitoring the generator operating state and being protected according to the generator abnormal work state monitored, and monitoring and protection and the metering circuit I of metering generator output electric weight, connection electric energy user or electrical network interface, for monitoring electrical network or power load operation and being protected according to the electrical network or the power load abnormal operating condition that monitor, and monitoring and protection and the metering circuit II of metering electrical network power consumption or power load variation, connect generator and controller, for the control signal according to controller, generator is carried out to reactive power compensation, the generator power factor is adjusted to the power factor compensation circuit of set point, connect battery cohort and controller, have each battery pack the state of charge observation circuit and anti-overcharge, prevented putting, the state of charge of anti-overvoltage, anti-under-voltage, anti-overheated, antioverloading, anti-reverse safety protective circuit each battery pack that will monitor feeds back to the battery pack monitoring and protecting circuit of controller, further, described generator comprises solar generator and the stand-by generator be connected with controller respectively, described stand-by generator be wind-driven generator, combustion type stirling generator and diesel engine generator at least one, solar generator or stand-by generator that the alternating current that controller utilizes distribution bus to transmit according to current line of radiation intensity selection starts are generated electricity, and according to the fixed frequency of inverter output AC electricity, control generator frequency, described solar generator is solar energy Stirling generator or Bretton generator, further, described controller also connects respectively monitoring and protection and metering circuit I, power factor compensation circuit, monitoring and protection and metering circuit II and battery pack monitoring and protecting circuit, for judging whether generator power output that monitoring and protection and metering circuit I transmit is greater than electrical network that monitoring and protection and metering circuit II transmit or electric energy user's power consumption, and the battery pack of setting an electric weight deficiency by battery cohort working mode control circuit when energy output is greater than power consumption under net state is operated in charge mode and controls the alternating current that rectification circuit transmits distribution bus and carry out rectification, control DC/DC circuit carries out voltage transformation to the direct current of rectification circuit output, controlling charging circuit utilizes the direct voltage of DC/DC circuit output to be charged to the battery pack that is operated in charge mode, setting by battery cohort working mode control circuit battery pack that an electric weight is full of when energy output is less than power consumption under net state is operated in powering mode and controls the alternating current that inverter circuit is fixed frequency to the DC inverter of the battery pack output that is operated in powering mode and transfer to distribution bus, and power ratio control factor compensation circuit carries out reactive power compensation to generator, the generator power factor is adjusted to set point, further, and can reduce the battery capacity of battery pack under net state.Described battery pack is batteries.
The control method of a kind of micro-mains supply system as shown in Figure 2, comprise the steps:
S1: the state of charge of each battery pack of battery pack monitoring and protecting circuit Real-Time Monitoring battery cohort changes and is transferred to controller, controller is set by battery cohort working mode control circuit the battery pack that an electric weight is full of and is operated in powering mode, battery cohort working mode control circuit is sent to controller by the powering mode setting signal simultaneously, carries out S2;
S2: the alternating current that the DC inverter that controller control inverter circuit is exported the battery pack that is operated in powering mode is fixed frequency also is transferred to generator by distribution bus, and described generator comprises solar generator and stand-by generator; Described stand-by generator be wind-driven generator, combustion type stirling generator and diesel engine generator at least one; Carry out S3;
S3: the generator that the AC power that controller will utilize distribution bus to transmit according to current direct solar radiation intensity selection starts, when direct solar radiation intensity reaches set point, the generating of selection solar generator, when direct solar radiation intensity does not reach set point, the generating of selection stand-by generator, carry out S4;
S4: the generator generating after startup is sent alternating current by distribution bus by it and is utilized the electrical network interface to be transferred to electrical network or provide power load to the electric energy user, the energy output of monitoring and protection and metering circuit I real time measure generator also is transferred to controller, monitoring and protection and metering circuit II real time measure electrical network or electric energy user's power consumption also is transferred to controller, carries out S5;
S5: the controller judgement, when whether energy output under net state is greater than power consumption, is to carry out S6, otherwise carries out S7;
S6: the battery pack that controller is set an electric weight deficiency by battery cohort working mode control circuit is operated in charge mode, simultaneously battery cohort working mode control circuit is sent to controller by the charge mode setting signal, and controller is controlled the alternating current that rectification circuit transmits distribution bus and carried out rectification, controls the DC/DC circuit direct current of rectification circuit output is carried out voltage transformation, controls charging circuit and utilize the direct voltage of DC/DC circuit output to be charged to the battery pack that is operated in charge mode;
S7: controller is set by battery cohort working mode control circuit the battery pack that an electric weight is full of and is operated in powering mode, the battery pack working mode control circuit is sent to controller by the powering mode setting signal simultaneously, and the alternating current that the DC inverter that controller control inverter circuit is exported the battery pack that is operated in powering mode is fixed frequency also transfers to the supplementary power consumption of distribution bus and is transferred to stand-by generator by distribution bus;
In addition, also have S8, controller power ratio control factor compensation circuit carries out reactive power compensation to generator, and the generator power factor is adjusted to set point; Also have S9, controller is regulated the charging current of the battery pack that is operated in charge mode by the output current of controlling the DC/DC circuit; Also there is S10, battery pack monitoring and protecting circuit changes according to the state of charge of each battery pack of monitoring, and when occur arbitrary battery pack overcharge, cross put, when overvoltage, under-voltage, overheated, overload and reversal connection, start anti-overcharge, prevented putting, anti-overvoltage, anti-under-voltage, anti-overheated, antioverloading and anti-reverse safety protective circuit; Also there is S11, under net state and described generator while being solar energy Stirling generator or combustion type stirling generator, battery cohort working mode control circuit set battery pack that an electric weight is full of be operated in powering mode keep arbitrary moment battery cohort continue the transmission direct current to the output fixed frequency inverter circuit to distribution bus.
The present invention by generator, monitoring and protection and metering circuit I, power factor compensation circuit, distribution bus, monitoring and protection and metering circuit II and electrical network interface form and net state under supply path, generator, monitoring and protection and metering circuit I, power factor compensation circuit, distribution bus, monitoring and protection and metering circuit II and power load form from the supply path under net state, generator, monitoring and protection and metering circuit I, power factor compensation circuit, distribution bus, rectification circuit, DC/DC circuit, charging circuit, battery cohort working mode control circuit and battery cohort form battery cohort charge path, battery cohort, battery cohort working mode control circuit, inverter circuit, distribution bus form battery cohort supply path, before this micro-grid system work, having a Battery pack group electric weight at least is full state, and the discharge condition of a Battery pack group in the appropriate degree of depth arranged, and each battery pack has three kinds of mode of operations, is respectively charge mode, powering mode and standby mode, when direct solar radiation intensity (DNI) index meets the set point of generating requirement, as set DNI, be greater than 200W/m
2the time, the generating of selection solar generator, if solar generator sends electric weight and is not enough to meet power demands, be operated in the temporary transient supplementary power of storage battery of powering mode, when if stand-by generator selects wind-driven generator and wind-force to reach the set point of satisfied generating requirement simultaneously, start wind turbine power generation, or start other stand-by generators as combustion type stirling generator or diesel engine generator generating, when direct solar radiation intensity (DNI) index does not meet the set point of generating requirement, as set DNI, be less than 200W/m
2the time, directly start stand-by generator as wind-driven generator, the generating of combustion type stirling generator or diesel engine generator, having guaranteed can motor-driven selection generator, and stand-by generator during actual the use in system can be in conjunction with geographical environment, weather conditions, demands etc. are selected wind-driven generator, the combustion type stirling generator, diesel engine generator at least one, realized with solar generator, it is the master that wind-driven generators etc. utilize the generating equipment of clean energy resource, the combustion type stirling generator, diesel engine generator and the energy storage of the battery cohort electric energy supplement supply equipment during as solar generator and wind-driven generator cisco unity malfunction, guaranteed that generator can 24 hours normal power supplies, this system can according to circumstances configure, if for grid-connected work, can reduce battery capacity, can switch to lonely net pattern when electrical network breaks down, a kind of micro-mains supply system provided by the invention and control method, both can pass through by generator, monitoring and protection and metering circuit I, power factor compensation circuit, distribution bus, monitoring and protection and metering circuit II and electrical network interface form and net state under supply path make this system works and net state, also can utilize by generator, monitoring and protection and metering circuit I, power factor compensation circuit, distribution bus, monitoring and protection and metering circuit II and power load formation realize powering from net of this system from the supply path under net state, the problem of having avoided existing electric power system must adopt the conversion of AC-DC-interchange to cause system effectiveness to reduce, generator comprises solar generator and stand-by generator simultaneously, wherein stand-by generator comprises wind-driven generator, combustion type stirling generator and diesel engine generator at least one, solar energy and wind energy have been effectively utilized, again can be at solar generator, when wind-driven generator can not generate electricity, adopting combustion type stirling generator or diesel engine generator is the reliable continued power of micro-grid system, guaranteed that this system can take full advantage of solar energy for the electrical network covering area is arranged, wind energy resources, can be for do not have chlamydate outlying district at electrical network yet, the zones such as island away from continent, by solar energy resources, wind energy becomes electric energy, make full use of the natural resources and promote the well-being of mankind, pass through by generator in addition, monitoring and protection and metering circuit I, power factor compensation circuit, distribution bus, rectification circuit, the DC/DC circuit, charging circuit, battery cohort working mode control circuit and battery cohort form battery cohort charge path and realize the charging of battery cohort, utilization is by the battery cohort, battery cohort working mode control circuit, inverter circuit, the battery cohort supply path that distribution bus forms takes full advantage of the battery cohort, for distribution bus provides the alternating current of stabilized frequency, guaranteed the stable operation of this system, the state of charge of the present invention by each battery pack of battery pack monitoring and protecting circuit Real-Time Monitoring battery cohort changes and is transferred to controller, controller is set the mode of operation of battery cohort by battery cohort working mode control circuit, control the interlock circuit action on supply path or charge path with Time Controller, and battery pack monitoring and protecting circuit has anti-overcharge, prevented putting, anti-overvoltage, anti-under-voltage, anti-overcharge, prevented putting, anti-overheated, the battery pack monitoring and protecting circuit of antioverloading and anti-reverse etc. safety protective circuit, safe and reliable, process is simple, and overcharge or charge less avoiding when be greater than the power consumption Time Controller regulates the battery pack that is operated in charge mode charging current by the output current of controlling the DC/DC circuit from energy output under net state, once charging process starts simultaneously, do not allow the Halfway Stopping charging in a charge cycle of battery pack, the batteries of charge mode, can configure many groups according to system requirements, can guarantee that every group storage battery all can be full of and not overcharge, solved the problem of the process complexity of existing control of power supply system accumulator cell charging and discharging, in addition, power factor compensation circuit carries out reactive power compensation to generator, the generator power factor is adjusted to set point, the common value of the set point of power factor is from perception 0.7 to capacitive 0.7, the AC power of the fixed frequency of simultaneously utilizing the power supply of battery cohort to provide through inverter circuit, can stablize the rotating speed of Stirling engine, like this, when the solar generator in this system adopts solar energy Stirling generator and standby combustion type stirling generator, can overcome the fixed drawback of Stirling engine rotary speed unstabilization, simultaneously, the supply path of this system is unobstructed, guarantee that the electric energy that generator sends can be smoothly through System Dependent path arrival user or electrical network, also can play the effect that maintains system stable operation, and controller is controlled generator frequency according to the fixed frequency of inverter output AC electricity, solved the problem that the frequency of existing alternating current power-generating system power supply need to be controlled, the present invention can be contained solar power system, wind generator system, combustion type Stirling electricity generation system and diesel power generation system, solved from net and grid-connected AC power supply problem, the energy output of generator utilizes the electrical network interface directly to be connected to the grid by distribution bus or directly provides power load to the electric energy user, if be greater than power consumption from energy output under net state, dump energy is offered to the charging of battery cohort, having avoided existing alternating current power-generating system that sent power supply is all become to DC power supply through rectifying device is stored in storage battery, cause electric power system very large to the capacity requirement of storage battery, improved the problem of system cost, feature richness of the present invention, easy to use, be applicable to micro-grid system and extensively promote.
The above; it is only preferably embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to replacement or changed according to technical scheme of the present invention and inventive concept thereof, within all should being encompassed in protection scope of the present invention.
Claims (10)
1. a micro-mains supply system is characterized in that comprising:
Generator;
Connect generator by distribution bus, for generator output AC electricity is transformed to galvanic rectification circuit;
Connect rectification circuit, for rectification circuit output direct current being carried out to the DC/DC circuit of voltage transformation;
Connect the DC/DC circuit and connect the battery cohort by battery cohort working mode control circuit, for the charging circuit that utilizes DC/DC circuit output direct current to be charged to the battery pack that is operated in charge mode;
Connect controller and battery cohort, set the battery cohort working mode control circuit of battery pack mode of operation for the state of charge according to battery pack; Described battery pack mode of operation comprises charge mode, powering mode and standby mode;
The battery cohort with at least three battery pack be connected with battery cohort working mode control circuit;
Connect the battery cohort by battery cohort working mode control circuit, the direct current of the battery pack output that is powering mode for mode of operation that battery cohort working mode control circuit is set carries out after alternating current that inversion is fixed frequency transferring to the inverter circuit of distribution bus;
Distribution bus; Described distribution bus connects respectively electric energy user and electrical network interface, for providing power load to the electric energy user under net state and also under net state, utilizing the electrical network interface to be switched on or switched off electrical network;
Connect respectively rectification circuit, the DC/DC circuit, charging circuit, battery cohort working mode control circuit and inverter circuit, the alternating current that the charge mode setting signal control rectification circuit sended over according to battery cohort working mode control circuit transmits distribution bus carries out rectification, control DC/DC circuit carries out voltage transformation to the direct current of rectification circuit output, controlling charging circuit utilizes the direct voltage of DC/DC circuit output to be charged to the battery pack that is operated in charge mode, the powering mode setting signal that sends over according to battery cohort working mode control circuit is controlled the alternating current that inverter circuit is fixed frequency to the DC inverter of the battery pack output that is operated in powering mode and is transferred to the controller of distribution bus.
2. a kind of micro-mains supply system according to claim 1 characterized by further comprising:
Connect generator, for monitoring the generator operating state and being protected according to the generator abnormal work state monitored, and monitoring and protection and the metering circuit I of metering generator output electric weight; Connection electric energy user or electrical network interface, for monitoring electrical network or power load operation and being protected according to the electrical network or the power load abnormal operating condition that monitor, and monitoring and protection and the metering circuit II of metering electrical network power consumption or power load variation;
Connect generator and controller, for the control signal according to controller, generator is carried out to reactive power compensation, the generator power factor is adjusted to the power factor compensation circuit of set point;
Connect battery cohort and controller, have each battery pack the state of charge observation circuit and anti-overcharge, prevented putting, the state of charge of anti-overvoltage, anti-under-voltage, anti-overheated, antioverloading, anti-reverse safety protective circuit each battery pack that will monitor feeds back to the battery pack monitoring and protecting circuit of controller.
3. a kind of micro-mains supply system according to claim 1, is characterized in that described generator comprises solar generator and the stand-by generator be connected with controller respectively; Described stand-by generator be wind-driven generator, combustion type stirling generator and diesel engine generator at least one, solar generator or stand-by generator that the alternating current that controller utilizes distribution bus to transmit according to current line of radiation intensity selection starts are generated electricity, and according to the fixed frequency of inverter output AC electricity, control generator frequency; Described solar generator is solar energy Stirling generator or Bretton generator.
4. a kind of micro-mains supply system according to claim 2, it is characterized in that described controller also connects respectively monitoring and protection and metering circuit I, power factor compensation circuit, monitoring and protection and metering circuit II and battery pack monitoring and protecting circuit, for judging whether generator power output that monitoring and protection and metering circuit I transmit is greater than electrical network that monitoring and protection and metering circuit II transmit or electric energy user's power consumption, and the battery pack of setting an electric weight deficiency by battery cohort working mode control circuit when energy output is greater than power consumption under net state is operated in charge mode and controls the alternating current that rectification circuit transmits distribution bus and carry out rectification, control DC/DC circuit carries out voltage transformation to the direct current of rectification circuit output, controlling charging circuit utilizes the direct voltage of DC/DC circuit output to be charged to the battery pack that is operated in charge mode, setting by battery cohort working mode control circuit battery pack that an electric weight is full of when energy output is less than power consumption under net state is operated in powering mode and controls the alternating current that inverter circuit is fixed frequency to the DC inverter of the battery pack output that is operated in powering mode and transfer to distribution bus, and power ratio control factor compensation circuit carries out reactive power compensation to generator, the generator power factor is adjusted to set point.
5. a kind of micro-mains supply system according to claim 1, it is characterized in that and net state under can reduce the battery capacity of battery pack.
6. the control method of a micro-mains supply system, is characterized in that comprising the steps:
S1: the state of charge of each battery pack of battery pack monitoring and protecting circuit Real-Time Monitoring battery cohort changes and is transferred to controller, controller is set by battery cohort working mode control circuit the battery pack that an electric weight is full of and is operated in powering mode, battery cohort working mode control circuit is sent to controller by the powering mode setting signal simultaneously, carries out S2;
S2: the alternating current that the DC inverter that controller control inverter circuit is exported the battery pack that is operated in powering mode is fixed frequency also is transferred to generator by distribution bus, and described generator comprises solar generator and stand-by generator; Described stand-by generator be wind-driven generator, combustion type stirling generator and diesel engine generator at least one; Carry out S3;
S3: the generator that the AC power that controller will utilize distribution bus to transmit according to current direct solar radiation intensity selection starts, when direct solar radiation intensity reaches set point, the generating of selection solar generator, when direct solar radiation intensity does not reach set point, the generating of selection stand-by generator, carry out S4;
S4: the generator generating after startup is sent alternating current by distribution bus by it and is utilized the electrical network interface to be transferred to electrical network or provide power load to the electric energy user, the energy output of monitoring and protection and metering circuit I real time measure generator also is transferred to controller, monitoring and protection and metering circuit II real time measure electrical network or electric energy user's power consumption also is transferred to controller, carries out S5;
S5: the controller judgement, when whether energy output under net state is greater than power consumption, is to carry out S6, otherwise carries out S7;
S6: the battery pack that controller is set an electric weight deficiency by battery cohort working mode control circuit is operated in charge mode, simultaneously battery cohort working mode control circuit is sent to controller by the charge mode setting signal, and controller is controlled the alternating current that rectification circuit transmits distribution bus and carried out rectification, controls the DC/DC circuit direct current of rectification circuit output is carried out voltage transformation, controls charging circuit and utilize the direct voltage of DC/DC circuit output to be charged to the battery pack that is operated in charge mode;
S7: controller is set by battery cohort working mode control circuit the battery pack that an electric weight is full of and is operated in powering mode, the battery pack working mode control circuit is sent to controller by the powering mode setting signal simultaneously, and the alternating current that the DC inverter that controller control inverter circuit is exported the battery pack that is operated in powering mode is fixed frequency also transfers to the supplementary power consumption of distribution bus and is transferred to stand-by generator by distribution bus.
7. the control method of a kind of micro-mains supply system according to claim 6, is characterized in that also having S8, and controller power ratio control factor compensation circuit carries out reactive power compensation to generator, and the generator power factor is adjusted to set point.
8. the control method of a kind of micro-mains supply system according to claim 6, is characterized in that also having S9, and controller is regulated the charging current of the battery pack that is operated in charge mode by the output current of controlling the DC/DC circuit.
9. the control method of a kind of micro-mains supply system according to claim 6; it is characterized in that also having S10; battery pack monitoring and protecting circuit changes according to the state of charge of each battery pack of monitoring; and when occur arbitrary battery pack overcharge, cross put, when overvoltage, under-voltage, overheated, overload and reversal connection, start anti-overcharge, prevented putting, anti-overvoltage, anti-under-voltage, anti-overheated, antioverloading and anti-reverse safety protective circuit.
10. the control method of a kind of micro-mains supply system according to claim 6, it is characterized in that also having S11, under net state and described generator while being solar energy Stirling generator or combustion type stirling generator, battery cohort working mode control circuit set battery pack that an electric weight is full of be operated in powering mode keep arbitrary moment battery cohort continue the transmission direct current to the output fixed frequency inverter circuit to distribution bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310109139.5A CN103151799B (en) | 2013-03-30 | 2013-03-30 | A kind of micro-capacitance sensor electric power system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310109139.5A CN103151799B (en) | 2013-03-30 | 2013-03-30 | A kind of micro-capacitance sensor electric power system and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103151799A true CN103151799A (en) | 2013-06-12 |
| CN103151799B CN103151799B (en) | 2015-08-12 |
Family
ID=48549730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310109139.5A Expired - Fee Related CN103151799B (en) | 2013-03-30 | 2013-03-30 | A kind of micro-capacitance sensor electric power system and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103151799B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103560544A (en) * | 2013-11-22 | 2014-02-05 | 国家电网公司 | System for starting large-scale power load in micro grid |
| CN104993478A (en) * | 2015-06-30 | 2015-10-21 | 华南理工大学 | Offline operation control method suitable for user-side microgrid |
| CN105429162A (en) * | 2015-12-28 | 2016-03-23 | 上海电力学院 | Wind power stabilizing method for three-battery topological structure-based battery energy storage systems |
| CN108616150A (en) * | 2018-03-30 | 2018-10-02 | 珠海银隆电器有限公司 | A kind of photovoltaic energy storage system intelligent power supply, storing up electricity method |
| CN110676868A (en) * | 2018-07-02 | 2020-01-10 | 赫普科技发展（北京）有限公司 | Wind, light and gas complementary coupling power generation system and method |
| CN110671271A (en) * | 2018-07-02 | 2020-01-10 | 赫普科技发展（北京）有限公司 | Complementary coupling power generation system and method |
| CN110957720A (en) * | 2019-11-15 | 2020-04-03 | 国网浙江省电力有限公司嘉兴供电公司 | Power supply system and method for stable power supply |
| CN115940295A (en) * | 2023-02-21 | 2023-04-07 | 国网山东省电力公司乳山市供电公司 | Electric energy monitoring control system and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0919066A (en) * | 1995-06-27 | 1997-01-17 | Japan Storage Battery Co Ltd | Dispersion type power supply |
| CN201623500U (en) * | 2010-01-22 | 2010-11-03 | 广东天富风光潮发电设备有限公司 | Small shunt-connected wind power generation system with storage battery |
| CN102237691A (en) * | 2011-07-06 | 2011-11-09 | 东北大学 | Wind energy and solar energy grid-connected generation system and control method thereof |
| CN102527569A (en) * | 2012-01-11 | 2012-07-04 | 陕西科技大学 | Music fountain system based on wind-light complementation |
| CN203151117U (en) * | 2013-03-30 | 2013-08-21 | 大连宏海新能源发展有限公司 | Micro grid power supply system |
-
2013
- 2013-03-30 CN CN201310109139.5A patent/CN103151799B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0919066A (en) * | 1995-06-27 | 1997-01-17 | Japan Storage Battery Co Ltd | Dispersion type power supply |
| CN201623500U (en) * | 2010-01-22 | 2010-11-03 | 广东天富风光潮发电设备有限公司 | Small shunt-connected wind power generation system with storage battery |
| CN102237691A (en) * | 2011-07-06 | 2011-11-09 | 东北大学 | Wind energy and solar energy grid-connected generation system and control method thereof |
| CN102527569A (en) * | 2012-01-11 | 2012-07-04 | 陕西科技大学 | Music fountain system based on wind-light complementation |
| CN203151117U (en) * | 2013-03-30 | 2013-08-21 | 大连宏海新能源发展有限公司 | Micro grid power supply system |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9882385B2 (en) | 2013-11-22 | 2018-01-30 | State Grid Hebei Electric Power Research Institute | System for starting large-scale power load in micro-grid |
| CN103560544B (en) * | 2013-11-22 | 2015-05-27 | 国家电网公司 | System for starting large-scale power load in micro grid |
| WO2015074417A1 (en) * | 2013-11-22 | 2015-05-28 | 国家电网公司 | System for starting large-scale power load in micro grid |
| CN103560544A (en) * | 2013-11-22 | 2014-02-05 | 国家电网公司 | System for starting large-scale power load in micro grid |
| CN104993478A (en) * | 2015-06-30 | 2015-10-21 | 华南理工大学 | Offline operation control method suitable for user-side microgrid |
| CN104993478B (en) * | 2015-06-30 | 2017-06-23 | 华南理工大学 | A kind of off-grid operation control method suitable for user side micro-capacitance sensor |
| CN105429162A (en) * | 2015-12-28 | 2016-03-23 | 上海电力学院 | Wind power stabilizing method for three-battery topological structure-based battery energy storage systems |
| CN108616150A (en) * | 2018-03-30 | 2018-10-02 | 珠海银隆电器有限公司 | A kind of photovoltaic energy storage system intelligent power supply, storing up electricity method |
| CN110676868A (en) * | 2018-07-02 | 2020-01-10 | 赫普科技发展（北京）有限公司 | Wind, light and gas complementary coupling power generation system and method |
| CN110671271A (en) * | 2018-07-02 | 2020-01-10 | 赫普科技发展（北京）有限公司 | Complementary coupling power generation system and method |
| CN110957720A (en) * | 2019-11-15 | 2020-04-03 | 国网浙江省电力有限公司嘉兴供电公司 | Power supply system and method for stable power supply |
| CN110957720B (en) * | 2019-11-15 | 2021-10-29 | 国网浙江省电力有限公司嘉兴供电公司 | Power supply system and method for stable power supply |
| CN115940295A (en) * | 2023-02-21 | 2023-04-07 | 国网山东省电力公司乳山市供电公司 | Electric energy monitoring control system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103151799B (en) | 2015-08-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103151799B (en) | A kind of micro-capacitance sensor electric power system and control method | |
| CN103595138B (en) | A kind of smart micro-grid system | |
| CN103647274B (en) | A kind of for can the energy control method of grid-connected and micro-grid system from network operation | |
| CN102510089B (en) | Wind-solar storage micro-grid system | |
| WO2018103232A1 (en) | Control method for new energy micro-grid electric vehicle charging station | |
| CN102664429B (en) | Grid-connected non-networking micro-grid system and control protection method thereof | |
| CN102412594B (en) | Control Method of Microgrid System | |
| CN104281977A (en) | Hybrid microgrid application platform and control method theref | |
| CN204669070U (en) | Wind featuring complementation of solar energy and fuel energy intelligent power generation control system | |
| CN104410105A (en) | Intelligent wind power plant control method based on direct-current bus grid structure | |
| CN101673963A (en) | Wind and solar hybrid generation system for communication base station based on dual direct-current bus control | |
| CN102324753B (en) | Energy storage control method of battery energy storage system | |
| CN106655265A (en) | Micro-grid energy management system for multiple energy sources | |
| CN105811458A (en) | Microgrid energy storage system and energy management method thereof | |
| CN110034557A (en) | A kind of ocean anchoring floating platform energy supplyystem and control method | |
| WO2019075879A1 (en) | Running mode conversion method for alternating-current/direct-current hybrid microgrid | |
| CN108347067A (en) | A kind of microgrid framework and control method containing battery energy storage and generator | |
| CN110707747A (en) | Household photovoltaic micro-grid energy management system containing coal-to-electricity equipment | |
| CN103337886B (en) | Industrial park wind-light storage micro-grid system | |
| CN110718937A (en) | Photovoltaic energy storage power distribution control method and system for smart home | |
| CN102097975A (en) | Complementary solar power generation system | |
| CN207010255U (en) | It is a kind of intelligent from grid-connected upgrading energy storage all-in-one | |
| Zhu et al. | Design and development of a microgrid project at rural area | |
| CN202405799U (en) | Independent wind-power grid system based on direct current bus | |
| CN103560537A (en) | Area distribution photovoltaic power supply grid-connected system and control method of area distribution photovoltaic power supply grid-connected system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150812 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |