CN102916481A - Direct-current microgrid system and energy management method thereof - Google Patents
Direct-current microgrid system and energy management method thereof Download PDFInfo
- Publication number
- CN102916481A CN102916481A CN2012102921581A CN201210292158A CN102916481A CN 102916481 A CN102916481 A CN 102916481A CN 2012102921581 A CN2012102921581 A CN 2012102921581A CN 201210292158 A CN201210292158 A CN 201210292158A CN 102916481 A CN102916481 A CN 102916481A
- Authority
- CN
- China
- Prior art keywords
- bus
- incorporated
- energy
- load
- voltage
- 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
Images
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention provides a direct-current (DC) microgrid system and an energy management method thereof. A power generation unit comprises a large user-side power grid and a grid-connected alternating current/direct current converter (AC/DC) thereof, a lithium iron phosphate energy storage system (EMS) and an energy storage direct current/direct current converter (DC/DC), and a photovoltaic power generation system and a photovoltaic DC/DC thereof. The DC microgrid system is provided with EMS and a wireless sensor network thereof, wherein the wireless sensor network is communicated with the grid-connected, energy storage and photovoltaic DC/DC; the EMS is used for executing different control strategies and optimizing the operation of a DC microgrid; the voltage of a DC busbar is stabilized by controlling a DC busbar voltage outer loop and an output inductive current inner loop through the grid-connected AC/DC when a grid-connected operation is switched to an islanding operation; and the islanding operation is switched to an operation using the energy storage DC/DC as a voltage source, i.e. the voltage stability of the DC busbar is maintained by controlling the DC busbar voltage outer loop and the inductive current inner loop on the energy storage side of a battery within the time of at most 20ms. Therefore, a seamless switching requirement is met, uninterrupted power supply (UPS) of loads in a telecom data center is realized, and configuration of reactive-load compensation equipment is avoided.
Description
Technical field
The present invention relates to micro-grid system, particularly relate to direct current micro-grid system and energy management method thereof.
Background technology
Microgrid is distributed power generation (distributed generation; initialism is DG) a kind of organizational form; the small-sized electric system of being transported to that it is comprised of distributed power source, energy storage device, energy converter, relevant load and supervisory control system, protective device; can realize oneself's control, protection and management; both can be incorporated into the power networks with external electrical network, also can isolated operation.Existing direct current micro-grid system still is in the implementation phase of modeling and simulating and small-power experimental system, mostly be seamed switching at islet operation when switching with being incorporated into the power networks, can not satisfy the reliable electricity consumption requirement of the critical load that comprises the teledata center, if realization seamless switching, then cost is high, and the control difficulty is large.
Summary of the invention
A technical problem to be solved by this invention is the defective that remedies above-mentioned prior art, and a kind of direct current micro-grid system is provided.
Another technical problem to be solved by this invention is the defective that remedies above-mentioned prior art, and a kind of energy management method of direct current micro-grid system is provided.
Direct current micro-grid system technical problem of the present invention is solved by the following technical programs.
This direct current micro-grid system, comprise at least one generator unit, load, and be arranged on dc bus distribution line between generator unit and the load, described generator unit comprises the large electrical network of user's side and three-phase bridge thereof two-way exchange/DC converter (Alternate Current/Direct Current converter that is incorporated into the power networks, initialism is AC/DC, hereinafter to be referred as the AC/DC that is incorporated into the power networks), the bidirectional energy-storage DC to DC converter of LiFePO4 energy-storage system and bi-directional half bridge Buck-Boost structure thereof (Direct current/Direct current converter, initialism is DC/DC, hereinafter to be referred as energy storage DC/DC), and the photovoltaic DC/DC (hereinafter to be referred as photovoltaic DC/DC) of photovoltaic generating system and employing Buck-Boost topological structure thereof, described load comprises analog DC load and data center's load, described LiFePO4 energy-storage system is used for stabilizing the power fluctuation that photovoltaic generating system sends and prolongs power supply to load when islet operation, and it is energy-conservation that described photovoltaic generating system is used for taking full advantage of solar environment friendly.
The described AC/DC that is incorporated into the power networks, its AC is connected with the large electrical network of described user's side by the switch that is incorporated into the power networks as points of common connection, and DC side is connected with described dc bus distribution line.
Described energy storage DC/DC, the one side is connected with described LiFePO4 energy-storage system, and opposite side is connected with described dc bus distribution line by the first branch breaker, and the energy-storage battery that is used for control LiFePO4 energy-storage system discharges and recharges.
Described photovoltaic DC/DC, the one side is connected with described photovoltaic generating system by header box, opposite side is connected with described dc bus distribution line by the second branch breaker, is used for the maximal power tracing that the realization photovoltaic generating system sends, and improves the solar energy utilization ratio.
Described analog DC load is connected with described dc bus distribution line by the 3rd branch breaker for pure resistor load, is used for switching direct current microgrid control model.
Described data center load comprises lighting load, air conditioner load and uninterrupted (Uninterrupted Power Supply, initialism is UPS) load, wherein the UPS load is critical load, preferentially to critical load UPS based model for load duration reliable power supply, described data center load is connected with described dc bus distribution line by the 4th branch breaker during islet operation.
The characteristics of this direct current micro-grid system are:
Be provided with EMS (Energy Management System, initialism is EMS) and set up the radio sensing network of communicating by letter with the described AC/DC of being incorporated into the power networks, energy storage DC/DC and photovoltaic DC/DC, described EMS is used for being incorporated into the power networks, carrying out respectively during islet operation different control strategies, optimize the operation of direct current micro-grid system, with coordinate each generator unit running status and send power.
Described EMS carries out different control strategies, optimize the operation of direct current microgrid, be included in and be incorporated into the power networks when switching to islet operation, adopted the control mode stable DC busbar voltage of DC bus-bar voltage outer shroud, outputting inductance current inner loop by the described AC/DC that is incorporated into the power networks, switch within the time of 20ms at the most that namely to adopt the control mode of encircling in DC bus-bar voltage outer shroud, the energy-storage battery side inductive current to keep DC bus-bar voltage with the voltage source form by described energy storage DC/DC stable, reach the requirement of seamless switching, realize teledata central concentrated load uninterrupted power supply.
Direct current micro-grid system technical problem of the present invention is solved by following further technical scheme.
The control strategy that described execution is different; optimize the operation of direct current micro-grid system; be included in when being incorporated into the power networks; the described AC/DC that is incorporated into the power networks adopts the control mode of DC bus-bar voltage outer shroud, outputting inductance current inner loop; realize energetic interaction with the large electrical network of described user's side; the stable DC busbar voltage, when islet operation, the described AC/DC of being incorporated into the power networks is in stopped status.
The control strategy that described execution is different, optimize the operation of direct current micro-grid system, be included in when being incorporated into the power networks, described energy storage DC/DC namely is operated in the charge or discharge state in the mode of constant current voltage limiting with the current source form, keep as far as possible LiFePO4 energy-storage system state-of-charge (State of Charge, initialism is SOC) be higher than the proportion threshold value that is enough to satisfy islet operation of setting, use during in order to islet operation; When islet operation, it is stable that described energy storage DC/DC namely adopts the control mode of encircling in DC bus-bar voltage outer shroud, the energy-storage battery side inductive current to keep DC bus-bar voltage with the voltage source form, and the proportion threshold value that being enough to of described setting satisfied islet operation is 75%～85%.
The control strategy that described execution is different, optimize the operation of direct current micro-grid system, also be included in when being incorporated into the power networks, described photovoltaic DC/DC is operated in maximal power tracing (Maximum Power Point Tracking, initialism is MPPT) pattern with the disturbance observation method; When islet operation, described photovoltaic DC/DC is operated in the MPPT pattern when photovoltaic generating system sends power less than loading demand, switch to constant voltage mode when photovoltaic generating system sends power greater than loading demand, prevents that DC bus-bar voltage is too high.
Described radio sensing network is the cordless communication network of carrying out the MODBUS-RTU communication protocol, comprise the communication server that is connected with described EMS, the Zigbee network terminal that is connected with the described communication server, be arranged on the Zigbee collector between described Zigbee network terminal and the described AC/DC of being incorporated into the power networks, be arranged on the 2nd Zigbee collector between described Zigbee network terminal and the described energy storage DC/DC, and be arranged on the 3rd Zigbee collector between described Zigbee network terminal and the described photovoltaic DC/DC, described EMS is by a zigbee collector, the 2nd Zigbee collector and the 3rd Zigbee collector receive respectively the described AC/DC of being incorporated into the power networks, remote signalling and telemetry intelligence (TELINT) that energy storage DC/DC and photovoltaic DC/DC upload, and by a zigbee collector, the 2nd Zigbee collector and the 3rd Zigbee collector are respectively to the described AC/DC that is incorporated into the power networks, energy storage DC/DC and photovoltaic DC/DC issue remote control and remote regulating instruction.
The energy management method technical problem of direct current micro-grid system of the present invention is solved by the following technical programs.
The energy management method of this direct current micro-grid system adopts above-mentioned direct current micro-grid system.
The characteristics of the energy management method of this direct current micro-grid system are:
The running status of described each generator unit of direct current micro-grid system is determined by d-c bus voltage value.
When steady operation is higher than when being incorporated into the power networks AC/DC commutation inversion switching threshold in DC bus-bar voltage, system works pattern: be incorporated into the power networks, in line with the principle of preferentially utilizing solar energy, the be incorporated into the power networks commutation inversion switching threshold of AC/DC of setting is specified d-c bus voltage value, the AC/DC that is incorporated into the power networks is operated in inverter mode, and energy storage DC/DC charges in the constant current voltage limiting mode, and photovoltaic DC/DC is operated in the MPPT pattern, when photovoltaic generating system sent power greater than load and energy storage charging demand, DC bus-bar voltage was raised.
When steady operation is lower than when being incorporated into the power networks AC/DC commutation inversion switching threshold in DC bus-bar voltage, system works pattern: be incorporated into the power networks, in line with the principle of preferentially utilizing solar energy, the be incorporated into the power networks commutation inversion switching threshold of AC/DC of setting is specified d-c bus voltage value, the AC/DC that is incorporated into the power networks is operated in rectification state, and energy storage DC/DC discharges in the constant current voltage limiting mode, and photovoltaic DC/DC is operated in the MPPT pattern, when photovoltaic generating system sent power less than loading demand, DC bus-bar voltage reduced.
When energy storage DC/DC when being higher than the charge threshold stable DC busbar voltage of specified d-c bus voltage value, the system works pattern: islet operation, the AC/DC that is incorporated into the power networks is in stopped status, energy storage DC/DC charges in the constant voltage mode, photovoltaic DC/DC is operated in the MPPT pattern; When photovoltaic generating system sent power greater than loading demand power, DC bus-bar voltage improved.
When DC bus-bar voltage is stabilized in the maximum of system's permission, the system works pattern: islet operation, the AC/DC that is incorporated into the power networks is in stopped status, and energy storage DC/DC is in stopped status, and photovoltaic DC/DC is operated in constant voltage mode.
When energy storage DC/DC when being lower than the discharge threshold stable DC busbar voltage of specified d-c bus voltage value, the system works pattern: islet operation, the AC/DC that is incorporated into the power networks is in stopped status, energy storage DC/DC is in discharge condition, photovoltaic DC/DC is operated in the MPPT pattern; When photovoltaic generating system sent power less than loading demand power, DC bus-bar voltage reduced.
Be that DC bus-bar voltage is when being lower than the minimum value that system allows when photovoltaic generating system sends proportion threshold value that power is lower than the common load of excision of setting less than load consumption power and LiFePO4 energy-storage system SOC; system works pattern: islet operation; in line with preferentially the principle of critical load UPS based model for load duration reliable power supply being excised common load; assurance is to critical load UPS based model for load duration reliable power supply; the AC/DC that is incorporated into the power networks is in stopped status; energy storage DC/DC is in discharge condition, and photovoltaic DC/DC is operated in the MPPT pattern.
The energy management method technical problem of direct current micro-grid system of the present invention is solved by following further technical scheme.
Described specified DC bus-bar voltage is 270V～280V.
The foundation that described charge threshold is set is as follows with principle: detect in real time maximum power and loading demand power that photovoltaic generating system sends, along with photovoltaic generating system sends increasing of power, DC bus-bar voltage raises, unnecessary energy is preserved to the charging of LiFePO4 energy-storage system by energy storage DC/DC, and with charge threshold stable DC busbar voltage.
The foundation that described discharge threshold is set is as follows with principle: along with photovoltaic generating system sends reducing of power, DC bus-bar voltage reduces, not enough energy is replenished by energy storage DC/DC discharge by the LiFePO4 energy-storage system, and with discharge voltage threshold value stable DC busbar voltage.
The foundation that the maximum that described DC bus-bar voltage allows is set is as follows with principle: when the LiFePO4 energy-storage system is in full state; energy storage DC/DC is in stopped status; along with photovoltaic generating system sends increasing of power; DC bus-bar voltage raises rapidly; determine the maximum that DC bus-bar voltage allows according to the maximum operating voltage scope that load allows, the maximum that described DC bus-bar voltage allows is 285V～295V.
The foundation that the minimum value that described DC bus-bar voltage allows is set is as follows with principle: determine the minimum value that DC bus-bar voltage allows according to the minimum operating voltage range that load allows, the minimum value that described DC bus-bar voltage allows is 255V～265V, the SOC of LiFePO4 energy-storage system is lower than the proportion threshold value of the common load of excision of setting at this moment, and the proportion threshold value of the common load of excision of described setting is 30%～50%.
The present invention's beneficial effect compared with prior art is: the present invention carries out different control strategies, optimize the operation of direct current microgrid, be included in and be incorporated into the power networks when switching to islet operation, AC/DC adopts the DC bus-bar voltage outer shroud by being incorporated into the power networks, the control mode stable DC busbar voltage of outputting inductance current inner loop, within the time of 20ms at the most, switch to by energy storage DC/DC and namely adopt the DC bus-bar voltage outer shroud with the voltage source form, it is stable that the control mode of encircling in the energy-storage battery side inductive current is kept DC bus-bar voltage, reach the requirement of seamless switching, satisfy the demand of teledata central concentrated load uninterrupted power supply, and owing to being the DC distribution circuit, do not need to configure again reactive-load compensation equipment.
Description of drawings
Fig. 1 is the compositional block diagram of the specific embodiment of the invention.
Fig. 2 is the compositional block diagram of the radio sensing network among Fig. 1.
Embodiment
Below in conjunction with embodiment and contrast accompanying drawing the present invention will be described.
A kind of as shown in drawings direct current micro-grid system comprises
Three generator units: the large electrical network 1 of user's side and capacity thereof are the AC/DC2 that is incorporated into the power networks, LiFePO4 energy-storage system 3 and the energy storage DC/DC4 thereof of 30kW, and photovoltaic generating system 5 and photovoltaic DC/DC6 thereof, LiFePO4 energy-storage system 3 comprises that capacity is the energy-storage battery of 20kW * 2 hour, be used for stabilizing the power fluctuation that photovoltaic generating system 5 sends and when islet operation, prolong power supply to load, photovoltaic generating system 5 adopts 10kW photovoltaic monocrystalline silicon battery, is used for taking full advantage of solar environment friendly energy-conservation;
Load: analog DC load 9 and data center's load 10, analog DC load 9 is the pure resistor load of 30kW, be that the dc bus distribution line 7 of 275V is connected by the 3rd branch breaker and rated voltage, be used for switching direct current microgrid control model, data center's load 10 comprises lighting load, air conditioner load and UPS load 11, and wherein the UPS load is critical load;
The AC/DC2 AC that is incorporated into the power networks is connected with the large electrical network 1 of user's side by the switch that is incorporated into the power networks as points of common connection, DC side is connected with dc bus distribution line 7, energy storage DC/DC4 one side is connected with LiFePO4 energy-storage system 3, opposite side is connected with dc bus distribution line 7 by the first branch breaker, the energy-storage battery that is used for control LiFePO4 energy-storage system 3 discharges and recharges, photovoltaic DC/DC6 one side is connected with photovoltaic generating system 5 by header box, opposite side is connected with dc bus distribution line 7 by the second branch breaker, be used for the maximal power tracing that realization photovoltaic generating system 5 sends, improve the solar energy utilization ratio.
The radio sensing network 12 of the execution MODBUS-RTU communication protocol that is provided with EMS8 and communicates by letter with the AC/DC2 that is incorporated into the power networks, energy storage DC/DC4 and photovoltaic DC/DC6 foundation, EMS8 is used for being incorporated into the power networks, carrying out respectively during islet operation different control strategies, optimize the operation of direct current micro-grid system, with coordinate three generator units running status and send power.
Radio sensing network 12 comprises the communication server 13 that is connected with EMS8, the Zigbee network terminal 14 that is connected with the communication server 13, be arranged on Zigbee network terminal 14 and the Zigbee collector 15 between the AC/DC2 of being incorporated into the power networks, be arranged on the 2nd Zigbee collector 16 between Zigbee network terminal 14 and the energy storage DC/DC4, and be arranged on the 3rd Zigbee collector 17 between Zigbee network terminal 14 and the photovoltaic DC/DC6, EMS8 is by a zigbee collector 15, the 2nd Zigbee collector 16 and the 3rd Zigbee collector 17 receive respectively the AC/DC2 that is incorporated into the power networks, remote signalling and telemetry intelligence (TELINT) that energy storage DC/DC4 and photovoltaic DC/DC6 upload, and by a zigbee collector 15, the 2nd Zigbee collector 16 and the 3rd Zigbee collector 17 are respectively to the AC/DC2 that is incorporated into the power networks, energy storage DC/DC4 and photovoltaic DC/DC6 issue remote control and remote regulating instruction.
EMS8 carries out different control strategies, optimizes the operation of direct current microgrid, comprises
Be incorporated into the power networks when switching to islet operation, adopted the control mode stable DC busbar voltage of DC bus-bar voltage outer shroud, outputting inductance current inner loop by the AC/DC2 that is incorporated into the power networks, switch within the time of 20ms at the most that namely to adopt the control mode of encircling in DC bus-bar voltage outer shroud, the energy-storage battery side inductive current to keep DC bus-bar voltage with the voltage source form by energy storage DC/DC4 stable, reach the requirement of seamless switching, realize teledata central concentrated load uninterrupted power supply;
When being incorporated into the power networks, the AC/DC2 that is incorporated into the power networks adopts the control mode of DC bus-bar voltage outer shroud, outputting inductance current inner loop, realizes energetic interaction with the large electrical network 1 of user's side, the stable DC busbar voltage, and when islet operation, the AC/DC2 that is incorporated into the power networks is in stopped status;
When being incorporated into the power networks, energy storage DC/DC4 namely is operated in the charge or discharge state in the mode of constant current voltage limiting with the current source form, keep as far as possible the SOC of LiFePO4 energy-storage system 3 to be higher than the proportion threshold value 80% that is enough to satisfy islet operation of setting, use during in order to islet operation; When islet operation, it is stable that energy storage DC/DC4 namely adopts the control mode of encircling in DC bus-bar voltage outer shroud, the energy-storage battery side inductive current to keep DC bus-bar voltage with the voltage source form;
When being incorporated into the power networks, photovoltaic DC/DC6 is operated in the MPPT pattern with the disturbance observation method; When islet operation, described photovoltaic DC/DC6 is operated in the MPPT pattern when photovoltaic generating system sends power less than loading demand, switch to constant voltage mode when photovoltaic generating system sends power greater than loading demand, prevents that DC bus-bar voltage is too high.
The energy management method of the specific embodiment of the present invention comprises
The running status of three generator units is determined by d-c bus voltage value, specified DC bus-bar voltage is 275V, determine that according to the maximum operating voltage scope that load allows the maximum that DC bus-bar voltage allows is 290V, determine that according to the minimum operating voltage range that load allows the minimum value that DC bus-bar voltage allows is 265V, this moment, LiFePO4 energy-storage system SOC was lower than the proportion threshold value 40% of the common load of excision of setting.
When steady operation is higher than when being incorporated into the power networks AC/DC2 commutation inversion switching threshold in DC bus-bar voltage, system works pattern: be incorporated into the power networks, in line with the principle of preferentially utilizing solar energy, the be incorporated into the power networks commutation inversion switching threshold of AC/DC2 of setting is specified d-c bus voltage value 275V, the AC/DC2 that is incorporated into the power networks is operated in inverter mode, energy storage DC/DC4 charges in the constant current voltage limiting mode, photovoltaic DC/DC6 is operated in the MPPT pattern, when photovoltaic generating system 5 sent power greater than load and energy storage charging demand, DC bus-bar voltage was raised.
When steady operation is lower than when being incorporated into the power networks AC/DC2 commutation inversion switching threshold in DC bus-bar voltage, system works pattern: be incorporated into the power networks, in line with the principle of preferentially utilizing solar energy, the be incorporated into the power networks commutation inversion switching threshold of AC/DC2 of setting is specified d-c bus voltage value 275V, the AC/DC2 that is incorporated into the power networks is operated in rectification state, and energy storage DC/DC4 discharges in the constant current voltage limiting mode, and photovoltaic DC/DC6 is operated in the MPPT pattern, when photovoltaic generating system 5 sent power less than loading demand, DC bus-bar voltage reduced.
When energy storage DC/DC4 when being higher than the charge threshold 280V stable DC busbar voltage of specified d-c bus voltage value 275V, system works pattern: islet operation, the AC/DC2 that is incorporated into the power networks is in stopped status, and energy storage DC/DC4 charges in the constant voltage mode, and photovoltaic DC/DC6 is operated in the MPPT pattern; When photovoltaic generating system 5 sent power greater than loading demand power, DC bus-bar voltage improved; The foundation that charge threshold is set is as follows with principle: detect in real time maximum power and loading demand power that photovoltaic generating system 5 sends, along with photovoltaic generating system 5 sends increasing of power, DC bus-bar voltage raises, unnecessary energy is preserved to 3 chargings of LiFePO4 energy-storage system by energy storage DC/DC4, and with charge threshold stable DC busbar voltage.
When DC bus-bar voltage is stabilized in the maximum 290V of system's permission, the system works pattern: islet operation, the AC/DC2 that is incorporated into the power networks is in stopped status, and energy storage DC/DC4 is in stopped status, and photovoltaic DC/DC6 is operated in constant voltage mode; The foundation that the maximum that DC bus-bar voltage allows is set is as follows with principle: when LiFePO4 energy-storage system 3 is in full state; energy storage DC/DC4 is in stopped status; along with photovoltaic generating system 5 sends increasing of power; DC bus-bar voltage raises rapidly, determines the maximum that DC bus-bar voltage allows according to the operating voltage range that load allows.
When energy storage DC/DC4 when being lower than the discharge threshold 270V stable DC busbar voltage of specified d-c bus voltage value 275V, system works pattern: islet operation, the AC/DC2 that is incorporated into the power networks is in stopped status, and energy storage DC/DC4 is in discharge condition, and photovoltaic DC/DC6 is operated in the MPPT pattern; When photovoltaic generating system 5 sent power less than loading demand power, DC bus-bar voltage reduced; The foundation that discharge threshold is set is as follows with principle: along with photovoltaic generating system 5 sends reducing of power, DC bus-bar voltage reduces, not enough energy is replenished by energy storage DC/DC4 discharge by LiFePO4 energy-storage system 3, and with discharge voltage threshold value stable DC busbar voltage.
Be that DC bus-bar voltage is when being lower than the minimum value 265V that system allows when photovoltaic generating system 5 sends proportion threshold value 40% that power is lower than the common load of excision of setting less than the SOC of load consumption power and LiFePO4 energy-storage system 3; system works pattern: islet operation; in line with preferentially the principle of critical load UPS based model for load duration reliable power supply being excised common load; assurance is to critical load UPS based model for load duration reliable power supply; the AC/DC2 that is incorporated into the power networks is in stopped status; energy storage DC/DC4 is in discharge condition, and photovoltaic DC/DC6 is operated in the MPPT pattern.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that implementation of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention; make without departing from the inventive concept of the premise some alternative or obvious modification that are equal to; and performance or purposes are identical, all should be considered as belonging to the scope of patent protection that the present invention is determined by claims of submitting to.
Claims (10)
1. direct current micro-grid system, comprise at least one generator unit, load, and be arranged on dc bus distribution line between generator unit and the load, described generator unit comprises the large electrical network of user's side and three-phase bridge thereof two-way exchange/DC converter AC/DC AC/DC that namely is incorporated into the power networks that is incorporated into the power networks, the bidirectional energy-storage DC to DC converter DC/DC of LiFePO4 energy-storage system and bi-directional half bridge Buck-Boost structure thereof is energy storage DC/DC, and the photovoltaic DC/DC of photovoltaic generating system and employing Buck-Boost topological structure thereof is photovoltaic DC/DC, described load comprises analog DC load and data center's load, described LiFePO4 energy-storage system be used for stabilizing power fluctuation that photovoltaic generating system sends and when islet operation prolongation to the power supply of load; It is energy-conservation that described photovoltaic generating system is used for taking full advantage of solar environment friendly;
The described AC/DC that is incorporated into the power networks, its AC is connected with the large electrical network of described user's side by the switch that is incorporated into the power networks as points of common connection, and DC side is connected with described dc bus distribution line;
Described energy storage DC/DC, the one side is connected with described LiFePO4 energy-storage system, and opposite side is connected with described dc bus distribution line by the first branch breaker, and the energy-storage battery that is used for control LiFePO4 energy-storage system discharges and recharges;
Described photovoltaic DC/DC, the one side is connected with described photovoltaic generating system by header box, opposite side is connected with described dc bus distribution line by the second branch breaker, is used for the maximal power tracing that the realization photovoltaic generating system sends, and improves the solar energy utilization ratio;
Described analog DC load is connected with described dc bus distribution line by the 3rd branch breaker for pure resistor load, is used for switching direct current microgrid control model;
Described data center load comprises lighting load, air conditioner load and uninterrupted UPS load, wherein the UPS load is critical load, during islet operation preferentially to critical load UPS based model for load duration reliable power supply, described data center load is connected with described dc bus distribution line by the 4th branch breaker, it is characterized in that:
Be provided with EMS EMS and set up the radio sensing network of communicating by letter with the described AC/DC of being incorporated into the power networks, energy storage DC/DC with photovoltaic DC/DC, described EMS is used for being incorporated into the power networks, carrying out respectively during islet operation different control strategies, optimize the operation of direct current micro-grid system, with coordinate each generator unit running status and send power;
Described EMS carries out different control strategies, optimize the operation of direct current microgrid, be included in and be incorporated into the power networks when switching to islet operation, adopted the control mode stable DC busbar voltage of DC bus-bar voltage outer shroud, outputting inductance current inner loop by the described AC/DC that is incorporated into the power networks, switch within the time of 20ms at the most that namely to adopt the control mode of encircling in DC bus-bar voltage outer shroud, the energy-storage battery side inductive current to keep DC bus-bar voltage with the voltage source form by described energy storage DC/DC stable, reach the requirement of seamless switching, realize teledata central concentrated load uninterrupted power supply.
2. direct current micro-grid system as claimed in claim 1 is characterized in that:
The control strategy that described execution is different; optimize the operation of direct current micro-grid system; be included in when being incorporated into the power networks; the described AC/DC that is incorporated into the power networks adopts the control mode of DC bus-bar voltage outer shroud, outputting inductance current inner loop; realize energetic interaction with the large electrical network of described user's side; the stable DC busbar voltage, when islet operation, the described AC/DC of being incorporated into the power networks is in stopped status.
3. direct current micro-grid system as claimed in claim 1 or 2 is characterized in that:
The control strategy that described execution is different, optimize the operation of direct current micro-grid system, be included in when being incorporated into the power networks, described energy storage DC/DC namely is operated in the charge or discharge state in the mode of constant current voltage limiting with the current source form, keep as far as possible LiFePO4 energy-storage system state-of-charge SOC to be higher than the proportion threshold value that is enough to satisfy islet operation of setting, use during in order to islet operation; When islet operation, it is stable that described energy storage DC/DC namely adopts the control mode of encircling in DC bus-bar voltage outer shroud, the energy-storage battery side inductive current to keep DC bus-bar voltage with the voltage source form, and the proportion threshold value that being enough to of described setting satisfied islet operation is 75%～85%.
4. direct current micro-grid system as claimed in claim 3 is characterized in that:
The control strategy that described execution is different is optimized the operation of direct current micro-grid system, also is included in when being incorporated into the power networks, and described photovoltaic DC/DC is operated in maximal power tracing MPPT pattern with the disturbance observation method; When islet operation, described photovoltaic DC/DC is operated in the MPPT pattern when photovoltaic generating system sends power less than loading demand, switch to constant voltage mode when photovoltaic generating system sends power greater than loading demand, prevents that DC bus-bar voltage is too high.
5. direct current micro-grid system as claimed in claim 4 is characterized in that:
Described radio sensing network is the cordless communication network of carrying out the MODBUS-RTU communication protocol, comprise the communication server that is connected with described EMS, the Zigbee network terminal that is connected with the described communication server, be arranged on the Zigbee collector between described Zigbee network terminal and the described AC/DC of being incorporated into the power networks, be arranged on the 2nd Zigbee collector between described Zigbee network terminal and the described energy storage DC/DC, and be arranged on the 3rd Zigbee collector between described Zigbee network terminal and the described photovoltaic DC/DC, described EMS is by a zigbee collector, the 2nd Zigbee collector and the 3rd Zigbee collector receive respectively the described AC/DC of being incorporated into the power networks, remote signalling and telemetry intelligence (TELINT) that energy storage DC/DC and photovoltaic DC/DC upload, and by a zigbee collector, the 2nd Zigbee collector and the 3rd Zigbee collector are respectively to the described AC/DC that is incorporated into the power networks, energy storage DC/DC and photovoltaic DC/DC issue remote control and remote regulating instruction.
6. the energy management method of the direct current micro-grid system of any one in an employing such as the claim 1 to 5 is characterized in that:
The running status of described each generator unit of direct current micro-grid system is determined by d-c bus voltage value;
When steady operation is higher than when being incorporated into the power networks AC/DC commutation inversion switching threshold in DC bus-bar voltage, system works pattern: be incorporated into the power networks, in line with the principle of preferentially utilizing solar energy, the be incorporated into the power networks commutation inversion switching threshold of AC/DC of setting is specified d-c bus voltage value, the AC/DC that is incorporated into the power networks is operated in inverter mode, and energy storage DC/DC charges in the constant current voltage limiting mode, and photovoltaic DC/DC is operated in the MPPT pattern, when photovoltaic generating system sent power greater than load and energy storage charging demand, DC bus-bar voltage was raised;
When steady operation is lower than when being incorporated into the power networks AC/DC commutation inversion switching threshold in DC bus-bar voltage, system works pattern: be incorporated into the power networks, in line with the principle of preferentially utilizing solar energy, the be incorporated into the power networks commutation inversion switching threshold of AC/DC of setting is specified d-c bus voltage value, the AC/DC that is incorporated into the power networks is operated in rectification state, and energy storage DC/DC discharges in the constant current voltage limiting mode, and photovoltaic DC/DC is operated in the MPPT pattern, when photovoltaic generating system sent power less than loading demand, DC bus-bar voltage reduced;
When energy storage DC/DC when being higher than the charge threshold stable DC busbar voltage of specified d-c bus voltage value, the system works pattern: islet operation, the AC/DC that is incorporated into the power networks is in stopped status, energy storage DC/DC charges in the constant voltage mode, photovoltaic DC/DC is operated in the MPPT pattern; When photovoltaic generating system sent power greater than loading demand power, DC bus-bar voltage improved;
When DC bus-bar voltage is stabilized in the maximum of system's permission, the system works pattern: islet operation, the AC/DC that is incorporated into the power networks is in stopped status, and energy storage DC/DC is in stopped status, and photovoltaic DC/DC is operated in constant voltage mode;
When energy storage DC/DC when being lower than the discharge threshold stable DC busbar voltage of specified d-c bus voltage value, the system works pattern: islet operation, the AC/DC that is incorporated into the power networks is in stopped status, energy storage DC/DC is in discharge condition, photovoltaic DC/DC is operated in the MPPT pattern; When photovoltaic generating system sent power less than loading demand power, DC bus-bar voltage reduced;
Be that DC bus-bar voltage is when being lower than the minimum value that system allows when photovoltaic generating system sends proportion threshold value that power is lower than the common load of excision of setting less than load consumption power and LiFePO4 energy-storage system SOC; system works pattern: islet operation; in line with preferentially the principle of critical load UPS based model for load duration reliable power supply being excised common load; assurance is to critical load UPS based model for load duration reliable power supply; the AC/DC that is incorporated into the power networks is in stopped status; energy storage DC/DC is in discharge condition, and photovoltaic DC/DC is operated in the MPPT pattern.
7. the energy management method of direct current micro-grid system as claimed in claim 6 is characterized in that:
Described specified DC bus-bar voltage is 270V～280V.
8. such as the energy management method of claim 6 or 7 described direct current micro-grid systems, it is characterized in that:
The foundation that described charge threshold is set is as follows with principle: detect in real time maximum power and loading demand power that photovoltaic generating system sends, along with photovoltaic generating system sends increasing of power, DC bus-bar voltage raises, unnecessary energy is preserved to the charging of LiFePO4 energy-storage system by energy storage DC/DC, and with charge threshold stable DC busbar voltage;
The foundation that described discharge threshold is set is as follows with principle: along with photovoltaic generating system sends reducing of power, DC bus-bar voltage reduces, not enough energy is replenished by energy storage DC/DC discharge by the LiFePO4 energy-storage system, and with discharge voltage threshold value stable DC busbar voltage.
9. such as the energy management method of claim 6 or 7 described direct current micro-grid systems, it is characterized in that:
The foundation that the maximum that described DC bus-bar voltage allows is set is as follows with principle: when the LiFePO4 energy-storage system is in full state; energy storage DC/DC is in stopped status; along with photovoltaic generating system sends increasing of power; DC bus-bar voltage raises rapidly; determine the maximum that DC bus-bar voltage allows according to the maximum operating voltage scope that load allows, the maximum that described DC bus-bar voltage allows is 285V～295V.
10. such as the energy management method of claim 6 or 7 described direct current micro-grid systems, it is characterized in that:
The foundation that the minimum value that described DC bus-bar voltage allows is set is as follows with principle: determine the minimum value that DC bus-bar voltage allows according to the minimum operating voltage range that load allows, the minimum value that described DC bus-bar voltage allows is 255V～265V, the SOC of LiFePO4 energy-storage system is lower than the proportion threshold value of the common load of excision of setting at this moment, and the proportion threshold value of the common load of excision of described setting is 30%～50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210292158.1A CN102916481B (en) | 2012-08-16 | 2012-08-16 | A kind of energy management method of direct current micro-grid system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210292158.1A CN102916481B (en) | 2012-08-16 | 2012-08-16 | A kind of energy management method of direct current micro-grid system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102916481A true CN102916481A (en) | 2013-02-06 |
| CN102916481B CN102916481B (en) | 2015-08-26 |
Family
ID=47614757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210292158.1A Expired - Fee Related CN102916481B (en) | 2012-08-16 | 2012-08-16 | A kind of energy management method of direct current micro-grid system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102916481B (en) |
Cited By (46)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296699A (en) * | 2013-03-19 | 2013-09-11 | 昆明理工大学 | Fast control method of planned isolated island power supply switching power balance based on wide range information |
| CN103337868A (en) * | 2013-06-26 | 2013-10-02 | 贵州电力试验研究院 | Method and device for inhibiting photovoltaic generation output power fluctuation |
| CN103390900A (en) * | 2013-07-22 | 2013-11-13 | 上海电力学院 | Distributed photovoltaic energy storage system and energy management method |
| CN103427430A (en) * | 2013-04-08 | 2013-12-04 | 深圳市天智系统技术有限公司 | Hybrid energy storage system and energy management method thereof in micro-grid |
| CN103441562A (en) * | 2013-08-28 | 2013-12-11 | 北京百度网讯科技有限公司 | High-voltage direct current power supply system |
| CN103490492A (en) * | 2013-08-28 | 2014-01-01 | 北京百度网讯科技有限公司 | High-voltage direct-current power supply system |
| CN103595072A (en) * | 2013-11-21 | 2014-02-19 | 国网上海市电力公司 | Method of micro-grid for seamless switching from off-grid state to grid-connection state |
| CN103618372A (en) * | 2013-12-11 | 2014-03-05 | 厦门大学 | Photovoltaic direct current micro-grid system |
| CN104007781A (en) * | 2013-02-22 | 2014-08-27 | 株式会社高砂制作所 | Power conditioner and power conditioning method |
| CN104022527A (en) * | 2014-05-16 | 2014-09-03 | 国家电网公司 | DC micro grid system |
| CN104065157A (en) * | 2014-06-09 | 2014-09-24 | 深圳微网能源管理系统实验室有限公司 | Uninterruptible power supply with improved power supply reliability |
| CN104104136A (en) * | 2014-07-18 | 2014-10-15 | 国网上海市电力公司 | Method for accessing new energy storage system to UPS |
| CN104113133A (en) * | 2014-07-01 | 2014-10-22 | 广东易事特电源股份有限公司 | Intelligent photovoltaic off-grid inverter system and power utilization control method thereof |
| CN104578043A (en) * | 2014-12-22 | 2015-04-29 | 浙江大学 | Power-balance coordination control method for light storage high-permeability direct-current micro-networks |
| CN105140907A (en) * | 2015-08-19 | 2015-12-09 | 华北电力大学（保定） | Multi-agent self-adaptive drop consistency coordination control method and apparatus for direct current microgrid |
| CN105186585A (en) * | 2015-11-10 | 2015-12-23 | 国家电网公司 | Energy coordination system for multisource intelligent microgrid under multi-modes |
| CN105305480A (en) * | 2015-07-13 | 2016-02-03 | 陕西省地方电力（集团）有限公司 | Hybrid energy-storage DC micro grid hierarchical control method |
| CN105449714A (en) * | 2015-12-30 | 2016-03-30 | 国网浙江省电力公司电力科学研究院 | Island switching control method and system for direct-current micro grid |
| CN105846419A (en) * | 2016-05-20 | 2016-08-10 | 武汉理工大学 | Photovoltaic and diesel complementary power supply system based on DC microgrid |
| CN106068588A (en) * | 2013-10-11 | 2016-11-02 | 逸节电子有限公司 | For realizing the distribution system of distributed power generation |
| CN106505549A (en) * | 2016-12-19 | 2017-03-15 | 中国石油大学(华东) | Based on the Novel DC micro-capacitance sensor circuit topological structure that buck boost connect |
| US9660439B2 (en) | 2015-06-05 | 2017-05-23 | General Electric Company | Direct current power distribution and protection system |
| CN108123432A (en) * | 2017-12-22 | 2018-06-05 | 厦门科华恒盛股份有限公司 | A kind of data center's new energy system |
| CN108512254A (en) * | 2018-05-20 | 2018-09-07 | 烟台仙崴机电有限公司 | A kind of energy internet photovoltaic generation micro-grid system |
| CN108646096A (en) * | 2018-03-05 | 2018-10-12 | 上海电力学院 | Line inductance detection method suitable for direct-current grid |
| CN108832635A (en) * | 2018-07-18 | 2018-11-16 | 杭州新融方科技有限公司 | Alternating current-direct current mixing micro-capacitance sensor and its operating method |
| CN109066666A (en) * | 2018-09-07 | 2018-12-21 | 广州京善电子有限公司 | Low-voltage distribution system |
| CN109755956A (en) * | 2017-11-08 | 2019-05-14 | 中国电力科学研究院有限公司 | The control method and control system of a kind of off-network island light storage micro-grid system |
| CN109888774A (en) * | 2019-03-04 | 2019-06-14 | 武汉大学 | A kind of Optimal Scheduling and method of Internet of Things energy router |
| CN110336310A (en) * | 2019-06-25 | 2019-10-15 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
| CN110474371A (en) * | 2019-09-02 | 2019-11-19 | 中建材蚌埠玻璃工业设计研究院有限公司 | A kind of scene hydrogen multipotency source integrated system |
| CN110518608A (en) * | 2019-07-08 | 2019-11-29 | 华北电力大学（保定） | Isolated island microgrid energy control method based on hybrid energy-storing and electric automobile charging station |
| CN110824275A (en) * | 2019-11-13 | 2020-02-21 | 国网山西省电力公司电力科学研究院 | Micro-grid AC/DC bus interface converter demonstration test platform |
| CN110912169A (en) * | 2019-12-03 | 2020-03-24 | 国网天津市电力公司 | Design method and topological structure of alternating current-direct current micro-grid |
| CN111337834A (en) * | 2020-02-27 | 2020-06-26 | 中国人民解放军陆军工程大学 | Battery electrical characteristic simulation system and simulation method thereof |
| CN111817334A (en) * | 2020-07-14 | 2020-10-23 | 珠海格力电器股份有限公司 | Direct-current power supply and distribution control method and system and direct-current micro data center |
| CN112154587A (en) * | 2018-03-08 | 2020-12-29 | 沙特阿拉伯石油公司 | Power supply control system |
| CN112383092A (en) * | 2020-11-24 | 2021-02-19 | 珠海格力电器股份有限公司 | Energy scheduling method, device and system |
| CN112653202A (en) * | 2020-12-03 | 2021-04-13 | 佛山科学技术学院 | Power supply and distribution system based on flexible direct current power distribution network and control method thereof |
| CN113300393A (en) * | 2021-05-18 | 2021-08-24 | 深圳供电局有限公司 | Direct-current microgrid battery energy storage energy management method, management equipment and storage medium |
| CN113364053A (en) * | 2021-06-23 | 2021-09-07 | 国家电网有限公司 | Operation decision method for realizing energy hub comprehensive energy |
| CN113377150A (en) * | 2021-06-30 | 2021-09-10 | 江苏领充创享新能源科技有限公司 | MPPT self-adaptive switching control method and system for light storage system |
| CN113410832A (en) * | 2021-06-18 | 2021-09-17 | 中国科学院电工研究所 | Wind-solar hydrogen storage integrated energy direct-current micro-grid operation control method |
| CN114301053A (en) * | 2021-12-29 | 2022-04-08 | 北京百度网讯科技有限公司 | Power supply system, control method and data center |
| CN116706999A (en) * | 2023-06-14 | 2023-09-05 | 上海嘉仕迈科技有限公司 | Energy monitoring management system suitable for light Chu Zhi is gentle |
| CN116846052A (en) * | 2023-05-23 | 2023-10-03 | 唐山冀东石油机械有限责任公司 | Multi-source direct-current power grid power supply topology circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1874280A (en) * | 2006-06-14 | 2006-12-06 | 秦毅 | ZigCcc supported method for collecting data of electric energy and device for measuring electric energy |
| JP2007129845A (en) * | 2005-11-04 | 2007-05-24 | Mitsubishi Electric Corp | Power quality maintaining controller |
| CN101931238A (en) * | 2010-04-29 | 2010-12-29 | 浙江省电力试验研究院 | Master-slave strategy-based microgrid system coordination control method |
| CN102157978A (en) * | 2011-04-14 | 2011-08-17 | 天津大学 | Wind-solar-diesel storage isolated microgrid system and control method thereof |
| CN102593832A (en) * | 2012-03-15 | 2012-07-18 | 武汉大学 | Three-wire DC microgrid system suitable for modern buildings and control method thereof. |
-
2012
- 2012-08-16 CN CN201210292158.1A patent/CN102916481B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007129845A (en) * | 2005-11-04 | 2007-05-24 | Mitsubishi Electric Corp | Power quality maintaining controller |
| CN1874280A (en) * | 2006-06-14 | 2006-12-06 | 秦毅 | ZigCcc supported method for collecting data of electric energy and device for measuring electric energy |
| CN101931238A (en) * | 2010-04-29 | 2010-12-29 | 浙江省电力试验研究院 | Master-slave strategy-based microgrid system coordination control method |
| CN102157978A (en) * | 2011-04-14 | 2011-08-17 | 天津大学 | Wind-solar-diesel storage isolated microgrid system and control method thereof |
| CN102593832A (en) * | 2012-03-15 | 2012-07-18 | 武汉大学 | Three-wire DC microgrid system suitable for modern buildings and control method thereof. |
Non-Patent Citations (2)
| Title |
|---|
| 唐西胜等: "基于储能的可再生能源微网运行控制技术", 《电力自动化设备》 * |
| 王宏等: "分布式风光互补电源的能量管理策略", 《电力电子技术》 * |
Cited By (63)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007781A (en) * | 2013-02-22 | 2014-08-27 | 株式会社高砂制作所 | Power conditioner and power conditioning method |
| CN103296699B (en) * | 2013-03-19 | 2017-11-10 | 昆明理工大学 | A kind of fast control method of the plan island with power conversion power-balance based on Wide-area Measurement Information |
| CN103296699A (en) * | 2013-03-19 | 2013-09-11 | 昆明理工大学 | Fast control method of planned isolated island power supply switching power balance based on wide range information |
| CN103427430A (en) * | 2013-04-08 | 2013-12-04 | 深圳市天智系统技术有限公司 | Hybrid energy storage system and energy management method thereof in micro-grid |
| CN103427430B (en) * | 2013-04-08 | 2017-07-11 | 深圳市天智系统技术有限公司 | A kind of energy management method of mixed energy storage system in microgrid |
| CN103337868A (en) * | 2013-06-26 | 2013-10-02 | 贵州电力试验研究院 | Method and device for inhibiting photovoltaic generation output power fluctuation |
| CN103390900A (en) * | 2013-07-22 | 2013-11-13 | 上海电力学院 | Distributed photovoltaic energy storage system and energy management method |
| CN103441562A (en) * | 2013-08-28 | 2013-12-11 | 北京百度网讯科技有限公司 | High-voltage direct current power supply system |
| CN103490492A (en) * | 2013-08-28 | 2014-01-01 | 北京百度网讯科技有限公司 | High-voltage direct-current power supply system |
| CN103490492B (en) * | 2013-08-28 | 2015-09-09 | 北京百度网讯科技有限公司 | High voltage direct current electric power system |
| CN103441562B (en) * | 2013-08-28 | 2016-03-16 | 北京百度网讯科技有限公司 | High voltage direct current electric power system |
| CN106068588A (en) * | 2013-10-11 | 2016-11-02 | 逸节电子有限公司 | For realizing the distribution system of distributed power generation |
| EP3055915A4 (en) * | 2013-10-11 | 2017-08-16 | Edge Electrons Limited | Electrical power distribution system for enabling distributed energy generation |
| CN106068588B (en) * | 2013-10-11 | 2019-07-02 | 逸节电子有限公司 | For realizing the distribution system of distributed power generation |
| CN103595072A (en) * | 2013-11-21 | 2014-02-19 | 国网上海市电力公司 | Method of micro-grid for seamless switching from off-grid state to grid-connection state |
| CN103618372A (en) * | 2013-12-11 | 2014-03-05 | 厦门大学 | Photovoltaic direct current micro-grid system |
| CN103618372B (en) * | 2013-12-11 | 2016-04-06 | 厦门大学 | A kind of photovoltaic direct current micro-grid system |
| CN104022527B (en) * | 2014-05-16 | 2016-02-17 | 国家电网公司 | Direct current micro-grid system |
| CN104022527A (en) * | 2014-05-16 | 2014-09-03 | 国家电网公司 | DC micro grid system |
| CN104065157A (en) * | 2014-06-09 | 2014-09-24 | 深圳微网能源管理系统实验室有限公司 | Uninterruptible power supply with improved power supply reliability |
| CN104065157B (en) * | 2014-06-09 | 2017-02-15 | 深圳微网能源管理系统实验室有限公司 | Uninterruptible power supply with improved power supply reliability |
| CN104113133A (en) * | 2014-07-01 | 2014-10-22 | 广东易事特电源股份有限公司 | Intelligent photovoltaic off-grid inverter system and power utilization control method thereof |
| CN104104136A (en) * | 2014-07-18 | 2014-10-15 | 国网上海市电力公司 | Method for accessing new energy storage system to UPS |
| CN104104136B (en) * | 2014-07-18 | 2016-07-06 | 国网上海市电力公司 | A kind of new forms of energy energy-storage system accesses the method for UPS |
| CN104578043A (en) * | 2014-12-22 | 2015-04-29 | 浙江大学 | Power-balance coordination control method for light storage high-permeability direct-current micro-networks |
| CN104578043B (en) * | 2014-12-22 | 2016-08-17 | 浙江大学 | A kind of power-balance coordinated regulation method of light storage Thief zone direct-current micro-grid |
| US9660439B2 (en) | 2015-06-05 | 2017-05-23 | General Electric Company | Direct current power distribution and protection system |
| CN105305480A (en) * | 2015-07-13 | 2016-02-03 | 陕西省地方电力（集团）有限公司 | Hybrid energy-storage DC micro grid hierarchical control method |
| CN105140907A (en) * | 2015-08-19 | 2015-12-09 | 华北电力大学（保定） | Multi-agent self-adaptive drop consistency coordination control method and apparatus for direct current microgrid |
| CN105186585A (en) * | 2015-11-10 | 2015-12-23 | 国家电网公司 | Energy coordination system for multisource intelligent microgrid under multi-modes |
| CN105449714B (en) * | 2015-12-30 | 2019-01-04 | 国网浙江省电力公司电力科学研究院 | A kind of the isolated island method for handover control and system of direct-current micro-grid |
| CN105449714A (en) * | 2015-12-30 | 2016-03-30 | 国网浙江省电力公司电力科学研究院 | Island switching control method and system for direct-current micro grid |
| CN105846419A (en) * | 2016-05-20 | 2016-08-10 | 武汉理工大学 | Photovoltaic and diesel complementary power supply system based on DC microgrid |
| CN105846419B (en) * | 2016-05-20 | 2019-01-25 | 武汉理工大学 | Photovoltaic, diesel oil complementary power supply system based on direct-current grid |
| CN106505549A (en) * | 2016-12-19 | 2017-03-15 | 中国石油大学(华东) | Based on the Novel DC micro-capacitance sensor circuit topological structure that buck boost connect |
| CN109755956A (en) * | 2017-11-08 | 2019-05-14 | 中国电力科学研究院有限公司 | The control method and control system of a kind of off-network island light storage micro-grid system |
| CN108123432A (en) * | 2017-12-22 | 2018-06-05 | 厦门科华恒盛股份有限公司 | A kind of data center's new energy system |
| CN108646096A (en) * | 2018-03-05 | 2018-10-12 | 上海电力学院 | Line inductance detection method suitable for direct-current grid |
| CN112154587A (en) * | 2018-03-08 | 2020-12-29 | 沙特阿拉伯石油公司 | Power supply control system |
| CN108512254A (en) * | 2018-05-20 | 2018-09-07 | 烟台仙崴机电有限公司 | A kind of energy internet photovoltaic generation micro-grid system |
| CN108832635A (en) * | 2018-07-18 | 2018-11-16 | 杭州新融方科技有限公司 | Alternating current-direct current mixing micro-capacitance sensor and its operating method |
| CN109066666A (en) * | 2018-09-07 | 2018-12-21 | 广州京善电子有限公司 | Low-voltage distribution system |
| CN109888774A (en) * | 2019-03-04 | 2019-06-14 | 武汉大学 | A kind of Optimal Scheduling and method of Internet of Things energy router |
| CN110336310A (en) * | 2019-06-25 | 2019-10-15 | 珠海格力电器股份有限公司 | Air conditioning system and control method thereof |
| CN110518608A (en) * | 2019-07-08 | 2019-11-29 | 华北电力大学（保定） | Isolated island microgrid energy control method based on hybrid energy-storing and electric automobile charging station |
| CN110474371A (en) * | 2019-09-02 | 2019-11-19 | 中建材蚌埠玻璃工业设计研究院有限公司 | A kind of scene hydrogen multipotency source integrated system |
| CN110824275A (en) * | 2019-11-13 | 2020-02-21 | 国网山西省电力公司电力科学研究院 | Micro-grid AC/DC bus interface converter demonstration test platform |
| CN110912169A (en) * | 2019-12-03 | 2020-03-24 | 国网天津市电力公司 | Design method and topological structure of alternating current-direct current micro-grid |
| CN111337834A (en) * | 2020-02-27 | 2020-06-26 | 中国人民解放军陆军工程大学 | Battery electrical characteristic simulation system and simulation method thereof |
| WO2022012427A1 (en) * | 2020-07-14 | 2022-01-20 | 珠海格力电器股份有限公司 | Direct-current power supply and distribution control method and system and direct-current micro data center |
| CN111817334A (en) * | 2020-07-14 | 2020-10-23 | 珠海格力电器股份有限公司 | Direct-current power supply and distribution control method and system and direct-current micro data center |
| CN112383092A (en) * | 2020-11-24 | 2021-02-19 | 珠海格力电器股份有限公司 | Energy scheduling method, device and system |
| CN112653202A (en) * | 2020-12-03 | 2021-04-13 | 佛山科学技术学院 | Power supply and distribution system based on flexible direct current power distribution network and control method thereof |
| CN112653202B (en) * | 2020-12-03 | 2022-01-25 | 佛山科学技术学院 | Power supply and distribution system based on flexible direct current power distribution network and control method thereof |
| CN113300393A (en) * | 2021-05-18 | 2021-08-24 | 深圳供电局有限公司 | Direct-current microgrid battery energy storage energy management method, management equipment and storage medium |
| CN113300393B (en) * | 2021-05-18 | 2024-03-29 | 深圳供电局有限公司 | Direct-current micro-grid battery energy storage energy management method, management equipment and storage medium |
| CN113410832A (en) * | 2021-06-18 | 2021-09-17 | 中国科学院电工研究所 | Wind-solar hydrogen storage integrated energy direct-current micro-grid operation control method |
| CN113364053B (en) * | 2021-06-23 | 2022-06-24 | 国家电网有限公司 | Operation decision method for realizing energy hub comprehensive energy |
| CN113364053A (en) * | 2021-06-23 | 2021-09-07 | 国家电网有限公司 | Operation decision method for realizing energy hub comprehensive energy |
| CN113377150A (en) * | 2021-06-30 | 2021-09-10 | 江苏领充创享新能源科技有限公司 | MPPT self-adaptive switching control method and system for light storage system |
| CN114301053A (en) * | 2021-12-29 | 2022-04-08 | 北京百度网讯科技有限公司 | Power supply system, control method and data center |
| CN116846052A (en) * | 2023-05-23 | 2023-10-03 | 唐山冀东石油机械有限责任公司 | Multi-source direct-current power grid power supply topology circuit |
| CN116706999A (en) * | 2023-06-14 | 2023-09-05 | 上海嘉仕迈科技有限公司 | Energy monitoring management system suitable for light Chu Zhi is gentle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102916481B (en) | 2015-08-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102916481B (en) | A kind of energy management method of direct current micro-grid system | |
| CN103427430B (en) | A kind of energy management method of mixed energy storage system in microgrid | |
| CN102983589B (en) | Control method of grid friendly type distributed power source based on hybrid energy storage | |
| CN103545905B (en) | A kind of photovoltaic direct-current micro-grid energy coordination control method | |
| CN103595138B (en) | A kind of smart micro-grid system | |
| CN104505867A (en) | Alternating current and direct current hybrid micro-grid system and control strategy thereof | |
| CN104022527B (en) | Direct current micro-grid system | |
| CN205646811U (en) | Photovoltaic directly exchanges and mixes little grid system | |
| CN103219726A (en) | Microgrid topology structure based on energy storage | |
| CN105811458A (en) | Microgrid energy storage system and energy management method thereof | |
| CN105116809A (en) | User customizable intelligent micro grid load control system and method | |
| CN102195525A (en) | Power supply system for photovoltaic (PV) building | |
| CN104779634A (en) | Micro-grid energy storage scheduling method | |
| CN105244909A (en) | Direct-current micro-grid system and grid-connection self-balancing control strategy | |
| CN202712876U (en) | Solar photovoltaic microgrid grid-connected power generation system | |
| CN105552966A (en) | Energy-storage direct-drive permanent magnet wind power generation system | |
| CN112909914A (en) | Intelligent direct-current micro-grid system suitable for building comprehensive energy supply station | |
| CN104333036A (en) | Multi-source coordination control system | |
| Moreno et al. | LVDC microgrid perspective for a high efficiency distribution system | |
| CN202435050U (en) | Distributed energy storage system of wind power station | |
| CN202586340U (en) | Low-voltage bipolar direct current micro-power grid system | |
| CN102122819A (en) | On-load tap changer (OLTC) controller for microgrid | |
| CN101728835A (en) | Battery power energy storing device for smoothing output power of wind power generation | |
| CN108347067A (en) | A kind of microgrid framework and control method containing battery energy storage and generator | |
| CN204316103U (en) | A kind of alternating current-direct current mixing micro-grid 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 | ||
| DD01 | Delivery of document by public notice |
Addressee: OuYang Baogen Document name: payment instructions |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: OuYang Baogen Document name: Notice of termination of patent right |
|
| DD01 | Delivery of document by public notice | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150826 Termination date: 20210816 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |