WO2018076554A1 - 一种交直流智能家庭微网协同系统及其运行方法 - Google Patents

一种交直流智能家庭微网协同系统及其运行方法 Download PDF

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Publication number
WO2018076554A1
WO2018076554A1 PCT/CN2017/070775 CN2017070775W WO2018076554A1 WO 2018076554 A1 WO2018076554 A1 WO 2018076554A1 CN 2017070775 W CN2017070775 W CN 2017070775W WO 2018076554 A1 WO2018076554 A1 WO 2018076554A1
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Prior art keywords
power quality
bus
power
voltage
sensitive load
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PCT/CN2017/070775
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English (en)
French (fr)
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章云
张桂东
陈思哲
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广东工业大学
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Priority to US15/760,925 priority Critical patent/US20180342869A1/en
Publication of WO2018076554A1 publication Critical patent/WO2018076554A1/zh

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/02—Circuit arrangements for ac mains or ac distribution networks using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J5/00—Circuit arrangements for transfer of electric power between ac networks and dc networks

Definitions

  • the invention relates to the field of micro-grids, in particular to an AC-DC intelligent home micro-network collaborative system and an operating method thereof.
  • Micro-Grid is also translated into micro-grid, which refers to a small power distribution system consisting of distributed power supply, energy storage device, energy conversion device, load, monitoring and protection devices.
  • the microgrid is an autonomous system that can achieve self-control, protection and management. It can be operated in parallel with the external grid or in isolation.
  • the proposed microgrid aims to realize the flexible and efficient application of distributed power sources and solve the problem of large-scale and diverse distributed power supply grid-connected problems.
  • the "Opinions of the State Council on Strengthening Urban Infrastructure Construction” pointed out that it is necessary to "advance the intelligentization of urban power grids to meet the demand for grid connection of new energy power and distributed power generation systems, optimize demand side management, and gradually realize two-way interaction between power systems and users.
  • the goal of improving power system utilization, safety and reliability, and power quality is to further strengthen the research and pilot demonstration of key technologies for urban smart distribution networks. Therefore, the requirements for the future power grid will be mainly reflected in the two aspects of green low carbon and high efficiency and reliability.
  • the power grid should meet the extensive and distributed access requirements of a large number of new energy sources to achieve clean side replacement on the power supply side. From an efficient and reliable perspective, the grid should fully exploit all potential “resources” that help balance the supply and demand of electricity, improve the grid's ability to accept new energy generation, and improve power quality and reliability.
  • the traditional home grid structure is shown in Figure 1.
  • some electrical equipment such as the wind.
  • Fans, washing machines, dishwashers, etc. directly from the 220V mains power.
  • DC power such as: computers, notebooks, mobile phones, electric vehicles, DC inverter air conditioners, etc., which need to convert AC power into DC power.
  • This intermediate level AC/DC conversion consumes approximately 10% of the power.
  • the traditional home microgrid is shown in Figure 2, and most European and American households adopt this structure. In this structure, there are both AC electrical equipment and DC power equipment. In addition, the new DC new energy module needs to be converted into AC power by DC-AC, and then converted to DC power supply DC power equipment. This conversion method will consume more than 20% of the power.
  • the new energy module shown in Figure 2 the intermittent problem of energy, will affect the normal operation of the power quality sensitive load and affect the stability of the power grid, so the new energy power generation cannot be fully integrated into the power grid.
  • the traditional solution is to use battery energy storage, but the battery cost is high, the energy storage capacity is limited, and frequent charging and discharging will shorten the battery life.
  • the existing power grid uses "line” as the basic dispatching unit, lacks the scheduling capability for specific power equipment, and cannot actively exert the precious “resources” such as "power quality non-sensitive load” to regulate the balance of power supply and demand.
  • resources such as "power quality non-sensitive load”
  • the supply and demand are unbalanced, only all the loads on a certain line can be passively removed, causing losses to the users who are passively powered off.
  • this scheduling mode if a large number of new energy sources with randomly varying power generation are forcibly connected, the reliability of the power grid will be further reduced.
  • the intermittent nature of conventional new energy sources has led to a large stability impact on the grid.
  • the embodiment of the invention provides an AC/DC intelligent home micro-network cooperative system and an operation method thereof, which are used for solving the technical problem that the intermittent characteristics of the conventional new energy source cause a large stability impact of the power grid, so that the new energy source is 100% Grid-connected and AC-DC intelligent home micro-network collaborative system is purely resistive and time-sharing for utility Constant power.
  • Embodiments of the present invention provide an AC-DC intelligent home micro-network cooperative system, including an AC-type power quality screening modulator, a DC-type power quality screening modulator, and a power coordination module;
  • the AC bus is connected to the power quality non-sensitive load AC bus through the AC power quality screening modulator;
  • the DC bus is connected to the power quality non-sensitive load DC bus through the DC type power quality screening modulator;
  • the AC-type power quality screening modulator, the DC-type power quality screening modulator is connected to the power coordination module;
  • the power coordination module receives each bus bar parameter detected by the AC power quality filter modulator and the DC power quality filter modulator and performs optimization calculation to obtain the power quality non-sensitive load AC bus Voltage, an optimal solution of the voltage of the power quality non-sensitive load DC bus, and an instruction to control the AC power quality filter modulator and the DC power quality filter modulator to adjust the power quality to be non-sensitive
  • the embodiment of the present invention further includes an electrical energy storage module
  • the electrical energy storage module is coupled to the direct current type power quality screening modulator.
  • the power quality non-sensitive load AC bus is connected to an AC type power quality non-sensitive load
  • the power quality non-sensitive load DC bus is connected to a DC type power quality non-sensitive load
  • the AC bus is connected to an AC type power quality sensitive load
  • the DC bus is connected to a DC type power quality sensitive load.
  • the embodiment of the present invention further provides an AC/DC smart home microgrid system, including the AC/DC smart home microgrid cooperative system, and further includes: the AC bus, the AC subnet, the DC bus, the DC subnet, and the DC. New energy subnet, bidirectional impedance type AC/DC converter module;
  • the AC subnet includes the AC power quality sensitive load, the AC power quality non-sensitive load, and the AC power quality screening modulator;
  • the DC subnet includes the DC type power quality sensitive load, the DC type power quality non-sensitive load, and the DC type power quality screening modulator.
  • the AC bus is respectively connected to the main power and the communication subnet;
  • the DC bus is respectively connected to the DC new energy subnet and the DC subnet;
  • the AC bus is connected to the DC bus through the bidirectional impedance type AC/DC converter module.
  • the DC new energy subnet is specifically a combination of DC-type new energy modules, including: a photovoltaic module and a wind power module;
  • the mains is connected to the alternating current bus through an island switch.
  • An embodiment of the present invention provides a method for operating an intelligent home micro-network system, and the smart home micro-network cooperative system is implemented according to the smart home micro-network system described above, including:
  • the power coordination module receives the voltage and current parameters of the AC bus detected by the AC power quality filter modulator and the voltage and current parameters of the power quality non-sensitive load AC bus, and the DC current power quality filter modulator detects the voltage and current parameters of the DC bus and Voltage and current parameters of power quality non-sensitive load DC bus;
  • the power coordination module performs optimization calculation according to the voltage and current parameters of the AC bus, the voltage and current parameters of the power quality non-sensitive load AC bus, the voltage and current parameters of the DC bus, and the voltage and current parameters of the power quality non-sensitive load DC bus. Obtaining the optimal solution of the voltage of the power quality non-sensitive load AC bus and the voltage of the power quality non-sensitive load DC bus;
  • the power coordination module adjusts the voltage of the power quality non-sensitive load AC bus through the AC power quality screening modulator according to the optimal solution, and the DC power quality filter modulator adjusts the voltage of the power quality non-sensitive load DC bus.
  • the performing optimization calculation is specifically:
  • the sum of the power loss of the AC power quality filter modulator, the DC power quality filter modulator, and the bidirectional impedance AC/DC converter is minimized as an optimization target, and the smart home microgrid system is purely resistive to the utility power and The time-sharing constant power and the new energy 100% are connected to the grid for optimization calculation.
  • the smart home micro-network system further includes an electric energy storage module, and the smart home micro-network system operating method is specifically:
  • the power coordination module receives the voltage current parameter of the AC bus detected by the AC power quality filter modulator and the voltage current parameter of the power quality non-sensitive load AC bus, and detects the voltage of the power storage module by the DC power quality filter modulator Current parameters, voltage and current parameters of the DC bus and voltage and current parameters of the power quality non-sensitive load DC bus;
  • the power coordination module is based on the voltage and current parameters of the AC bus, the voltage and current parameters of the power quality non-sensitive load AC bus, the voltage and current parameters of the DC bus, the voltage and current parameters of the power storage module, and the power quality non-sensitive load DC
  • the voltage and current parameters of the busbar are optimized, and the voltage of the power quality non-sensitive load AC bus, the voltage of the non-sensitive load DC bus, and the optimal solution of the charge and discharge power of the energy storage module are obtained;
  • the power coordination module adjusts the voltage of the power quality non-sensitive load AC bus through the AC type power quality screening modulator according to the optimal solution, and the DC type power quality screening modulator adjusts the power quality non-sensitive load DC bus voltage and energy storage Module charging and discharging power.
  • the performing optimization calculation is specifically:
  • the home microgrid system optimizes the calculation of the city's electricity with pure resistive and time-sharing constant power, and 100% of the new energy grid.
  • the embodiment of the invention discloses an AC/DC intelligent home micro-network cooperative system, which receives the bus bar parameters detected by the power quality screening modulator through the power coordination module and performs optimization calculation, thereby controlling the electricity
  • the quality screening modulator adjusts the bus current voltage and power to balance the random fluctuation of the new energy generation power, and realizes the stable operation of the AC/DC home microgrid system, and solves the intermittent characteristics of the conventional new energy in the prior art.
  • the embodiment of the invention further provides an AC-DC intelligent home micro-grid system based on the AC-DC intelligent home micro-network cooperative system, which solves the problem that the AC power needs to be converted to supply power to the DC load in the prior art, and the DC power needs to be The technical problem of secondary conversion to supply DC loads.
  • the embodiment of the invention provides a synergistic method for the AC and DC intelligent home microgrid system.
  • the power coordination module comprehensively analyzes the parameters of each bus bar and performs optimization calculation, and finally adjusts the voltage and current power, so that the AC and DC home microgrid system can operate stably.
  • the new energy is 100% connected to the grid and the AC/DC smart home microgrid collaborative system is purely resistive and time-sharing constant power to the mains.
  • FIG. 1 is a structural diagram of a conventional home circuit for explaining the background art of the present invention
  • FIG. 3 is a schematic diagram of an AC/DC smart home micro-network cooperative system according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of an AC/DC smart home microgrid system according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of a method for operating an AC-DC smart home micro-network system according to an embodiment of the present invention
  • FIG. 6 is a flowchart of a method for operating an AC-DC smart home micro-network system according to another embodiment of the present invention.
  • Power coordination module 2. AC-type power quality screening modulator; 3. DC-type power quality Screening modulator; 4, electric energy storage module; 5, AC type power quality non-sensitive load; 6, AC type power quality sensitive load; 7, DC type power quality non-sensitive load; 8, DC type power quality sensitive type Load; 9, bidirectional impedance type AC/DC converter module.
  • the embodiment of the invention provides an AC/DC intelligent home micro-network cooperative system and a running method thereof, which are used for balancing the random fluctuation of the power generation power of the new energy, realizing the stable operation of the AC-DC home micro-grid, and solving the conventional new in the prior art.
  • the technical problem of the intermittent characteristics of energy impacting the power grid makes the new energy 100% connected to the grid and makes the AC-DC smart home micro-network synergy system purely resistive and time-sharing constant power to the mains.
  • an embodiment of the present invention provides an AC-DC intelligent home micro-network cooperative system, including an AC-type power quality filter modulator 2, a DC-type power quality filter modulator 3, and a power coordination module 1;
  • the AC bus is connected to the power quality non-sensitive load AC bus through the AC power quality filter modulator 2;
  • the DC bus is connected to the power quality non-sensitive load DC bus through the DC power quality filter modulator 3;
  • AC power quality filter modulator 2 DC power quality filter modulator 3 connected to the power coordination module 1;
  • the power coordination module 1 receives each bus bar parameter detected by the AC power quality filter modulator 2 and the DC power quality filter modulator 3 and performs optimization calculation to obtain a power quality non-sensitive type.
  • Load AC bus voltage, power quality, non-sensitive load DC bus voltage optimal solution, and issue command control AC type power quality filter modulator 2 and DC type power quality filter modulator 3 adjust power quality non-sensitive load exchange Bus voltage, power quality Non-sensitive load DC bus voltage.
  • the embodiment of the present invention can finally make 100% of the new energy grid connected to the grid and make the AC/DC smart home microgrid cooperative system have pure resistive and time-sharing constant power for the commercial power.
  • the embodiment of the invention further includes an electrical energy storage module 4;
  • the power storage module 4 is connected to the DC type power quality filter modulator 3.
  • the AC bus is connected to the AC type power quality sensitive load 6;
  • the DC bus is connected to a DC-type power quality sensitive load 8.
  • the AC type power quality sensitive load 6 is specifically a load that requires high power quality.
  • the AC type power quality non-sensitive load 5 is specifically a load that does not require high power quality.
  • Power quality includes voltage and current accuracy and stability.
  • the AC type power quality sensitive load 6 refers to: rice cooker, computer, washing machine, television, fan, and the like.
  • AC-type power quality non-sensitive load 5 refers to: water heaters, electric blankets, electric kettles, building icing equipment, etc.
  • the concept of the DC type power quality sensitive load 8 and the DC type power quality non-sensitive load 7 is similar to the AC type power quality sensitive type load 6 and the AC type power quality non-sensitive type load 5, and the person in the field can clearly recognize the communication and the exchange. The difference between DC is not repeated here.
  • an embodiment of the present invention further provides an AC/DC smart home microgrid system, including
  • the AC/DC intelligent home micro-network cooperative system further includes: an AC bus, an AC subnet, a DC bus, a DC subnet, a DC new energy subnet, and a bidirectional impedance AC/DC converter module 9;
  • the AC subnet includes an AC type power quality sensitive load 6, an AC type power quality non-sensitive type load 5, an AC type power quality screening modulator 2;
  • the DC subnet includes a DC power quality sensitive load 8, a DC power quality non-sensitive load 7, and a DC power quality filter modulator 3.
  • the AC bus is connected to the mains and communication subnets respectively;
  • the DC bus is connected to the DC new energy subnet and the DC subnet respectively;
  • the AC bus is connected to the DC bus through a bidirectional impedance type AC/DC converter module 9.
  • the DC new energy subnet is specifically a combination of DC-type new energy modules, including: photovoltaic modules and wind power modules;
  • the mains is connected to the AC bus via an island switch.
  • an embodiment of the present invention provides a method for operating a smart home micro-network system, and the smart home micro-network cooperative system is implemented according to the above-mentioned smart home micro-network system, including:
  • the power coordination module receives the voltage current parameter of the AC bus detected by the AC power quality screening modulator and the voltage current parameter of the power quality non-sensitive load AC bus, and detects the voltage and current of the DC bus by the DC power quality screening modulator. Parameter and power quality non-sensitive load DC bus voltage and current parameters;
  • the power coordination module optimizes according to the voltage and current parameters of the AC bus, the voltage and current parameters of the power quality non-sensitive load AC bus, the voltage and current parameters of the DC bus, and the voltage and current parameters of the power quality non-sensitive load DC bus. Calculate and obtain the optimal solution of the voltage of the power quality non-sensitive load AC bus and the voltage of the power quality non-sensitive load DC bus;
  • the power coordination module adjusts a voltage of the power quality non-sensitive load AC bus through the AC power quality screening modulator according to the optimal solution, and the DC power quality filter modulator adjusts the voltage of the power quality non-sensitive load DC bus.
  • the optimization calculation in the above step 102 is specifically as follows:
  • the sum of the power loss of the AC power quality filter modulator, the DC power quality filter modulator, and the bidirectional impedance AC/DC converter is minimized as an optimization target, and the smart home microgrid system is purely resistive to the utility power and The time-sharing constant power and the new energy 100% are connected to the grid for optimization calculation.
  • the voltage of the power quality non-sensitive load AC bus is regulated by the AC power quality filter modulator, and the DC power quality filter modulator adjusts the power quality of the non-sensitive load DC bus voltage.
  • Regulators are used to regulate voltage, active, and reactive power on non-sensitive loads to achieve sensitive active, reactive, and voltage stability.
  • time-sharing constant power means that the smart home micro-grid system keeps the power of the mains constant for a period of time, for example, the power demand of the utility power is 1000 watts from 6 am to 8 am.
  • Time sharing means that the constant power can maintain different constant values for different time periods.
  • a method for operating an AC-DC smart home micro-network system is implemented based on a smart home micro-network cooperative system including a power storage module and a smart home micro-network system.
  • the operation method of the smart home microgrid system is specifically as follows:
  • the power coordination module receives the voltage current parameter of the AC bus detected by the AC power quality screening modulator and the voltage current parameter of the power quality non-sensitive load AC bus, and the DC energy quality screening modulator detects the energy storage module. Voltage and current parameters, voltage and current parameters of the DC bus and voltage and current parameters of the power quality non-sensitive load DC bus;
  • the power coordination module is not sensitive according to the voltage and current parameters of the AC bus and the power quality.
  • the voltage and current parameters of the load AC bus, the voltage and current parameters of the DC bus, the voltage and current parameters of the energy storage module, and the voltage and current parameters of the power quality non-sensitive load DC bus are optimized to obtain the power quality non-sensitive load.
  • the power coordination module adjusts a voltage of the power quality non-sensitive load AC bus through the AC power quality screening modulator according to the optimal solution, and the DC power quality filter modulator adjusts the voltage of the power quality non-sensitive load DC bus.
  • the energy storage module charges and discharges power.
  • the optimization calculation in the above step 202 is specifically as follows:
  • the home microgrid system optimizes the calculation of the city's electricity with pure resistive and time-sharing constant power, and 100% of the new energy grid.
  • Another embodiment of the present invention provides an AC and DC intelligent home microgrid system and a method for operating the same, including a mains interface, an island switch, an AC bus, an AC subnet, a DC bus, a DC subnet, a DC new energy subnet, and a bidirectional Impedance type AC/DC converter module 9, power coordination module 1, and operation method.
  • the mains interface is connected to the island switch, and the single switch is connected to the AC bus;
  • the AC bus is connected to the AC subnet.
  • the bidirectional impedance type AC/DC converter module 9 is connected between the AC bus and the DC bus to realize energy exchange.
  • the DC new energy subnet is connected to the DC bus.
  • the DC subnet is connected to the DC bus.
  • the power coordination module 1 is respectively connected with the AC subnet and the DC subnet to realize coordinated control of power.
  • An AC subnet in an AC/DC smart home microgrid system includes: an AC power quality filter modulator 2, a power quality non-sensitive load AC bus, and N AC types. Power quality non-sensitive load interface, voltage and current detection module on AC bus, M AC power quality sensitive AC load interface.
  • the AC power quality screening modulator 2 is connected between the AC bus and the power quality non-sensitive load AC bus;
  • N AC power quality non-sensitive load interfaces are connected to the power quality non-sensitive load AC bus;
  • AC type power quality sensitive load 6 refers to: rice cooker, computer, washing machine, TV, fan, etc.
  • AC-type power quality non-sensitive load 5 refers to: water heaters, electric blankets, electric kettles, building icing equipment, etc.
  • the concept of the DC type power quality sensitive load 8 and the DC type power quality non-sensitive load 7 is similar to the AC type power quality sensitive type load 6 and the AC type power quality non-sensitive type load 5, and the person in the field can clearly recognize the communication and the exchange. The difference between DC is not repeated here.
  • the voltage and current detection module obtains a signal from the AC bus and transmits it to the power coordination module for detecting that the AC power quality filter modulator 2 cannot detect the AC bus or the AC power quality filter modulator 2 is not designed.
  • the AC bus is tested when the function of the AC bus is used.
  • a DC subnet in an AC/DC smart home microgrid includes: a DC power quality filter modulator, an energy storage module, a voltage and current detection module on a DC bus, and a DC type. Power quality non-sensitive load bus, U DC power quality non-sensitive load interface, V DC power quality sensitive load interface.
  • DC power quality filter modulator connected to DC bus and power quality non-sensitive load straight Between stream busses;
  • U DC power quality non-sensitive load interfaces are connected to the power quality non-sensitive load DC bus
  • V power quality sensitive DC load interfaces are connected to the DC bus
  • the energy storage module is connected to the DC power quality filter modulator and combined with the DC power quality filter modulator to achieve reasonable distribution and modulation of the new energy.
  • Another embodiment of the present invention provides a DC new energy subnet in an AC-DC smart home micro-network, which includes: a photovoltaic module, a wind power module, and other DC-type energy modules.
  • the new energy modules are connected to the DC bus.
  • a bidirectional impedance type AC/DC converter module in an AC/DC smart home microgrid refers to placing an impedance network at a DC bus end, thereby enabling an AC/DC converter to obtain a DC current.
  • the function of busbar short-circuit immunity improves the robustness of the microgrid structure.
  • An aspect of the power coordination module and the operation method in the AC-DC smart home micro-network provided by another embodiment of the present invention means that the voltage-current detecting module sends the detected signal to the power coordination module, and
  • the AC power quality filter modulator will detect the voltage, current and power of the AC bus to the power coordination module;
  • the AC power quality filter modulator will detect the parameters of each AC sensitive load interface and send it to the power coordination module;
  • the power quality filter modulator will detect the parameters of each AC non-sensitive load interface and send it to the power coordination module.
  • the DC power quality filter modulator will detect the voltage, current and power of the DC bus to the power coordination module; the DC power quality filter modulator will detect the parameters of each DC sensitive load interface and send it to the power coordination module; The power quality filter modulator will detect the parameters of each DC non-sensitive load interface and send it to the power coordination module.
  • the DC power quality filter modulator will detect the parameters of the energy storage module and send them to the power coordination module.
  • the power coordination module After receiving the above data, the power coordination module presents pure resistance to the utility power by the home microgrid system.
  • the time-sharing constant power and the new energy are completely connected to the grid, and the sum of the power losses of the AC power quality filter modulator, the DC power quality filter modulator, the bidirectional impedance AC/DC converter, and the energy storage module are minimized.
  • optimize the service life of the energy storage module to optimize the calculation obtain the optimal solution of the power quality non-sensitive load AC bus voltage, the power quality non-sensitive load DC bus voltage and the charge and discharge power of the energy storage module, and They are respectively transmitted to an AC-type power quality filter modulator and a DC-type power quality filter modulator for implementation control.
  • An operating method in an AC/DC smart home microgrid includes maintaining a DC bus voltage at a rated value by controlling the bidirectional impedance type AC/DC converter module 9.
  • the present invention is to add a DC bus and a corresponding bidirectional impedance AC/DC converter to form an intelligent home microgrid for AC/DC mixing on the basis of the existing power grid structure.
  • the load is divided into power quality sensitive load and power quality non-sensitive load, and the power quality non-sensitive load power is adjusted by the corresponding power quality screening modulator to balance the random fluctuation of the new energy power generation, and the power quality is ensured.
  • Simultaneous operation of the sensitive load makes the whole microgrid exhibit pure resistive and time-sharing constant power to the mains, and improve the stable operation capability of the upper power grid.
  • the invention effectively avoids the disadvantages of the multi-level energy conversion (DC-AC-DC) inefficiency of the conventional new energy module.
  • the invention relates to an AC/DC intelligent home microgrid and an operation method thereof, which make full use of such valuable energy storage resources such as power quality non-sensitive load, and ensure the full utilization of new energy generation while making the entire microgrid
  • the mains presents pure resistance and time-sharing constant power, which theoretically makes the home grid achieve zero pollution to the upper grid.
  • the present invention enables 100% of new energy to be connected to the grid and enables the AC-DC smart home micro-network cooperative system to be purely resistive and time-sharing constant power to the commercial power.

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Abstract

一种交直流智能家庭微网协同系统，包括：交流型电能质量筛选调制器（2）、直流型电能质量筛选调制器（3）、功率协同模块（1）。该交直流智能家庭微网协同系统通过功率协同模块（1）接收由电能质量筛选调制器检测的各母线参数并进行优化计算，进而控制电能质量筛选调制器调节母线电流电压和功率，从而平衡新能源发电功率的随机波动，实现了交直流家庭微网的稳定运行，解决现有技术中常规的新能源的间歇性特点对电网造成冲击的技术问题，使新能源100％并网并使交直流智能家庭微网协同系统对市电呈纯阻性和分时恒功率。

Description

一种交直流智能家庭微网协同系统及其运行方法
本申请要求于2016年10月26日提交中国专利局、申请号为201610947750.9、发明名称为“一种交直流智能家庭微网协同系统及其运行方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及微电网领域，尤其涉及一种交直流智能家庭微网协同系统及其运行方法。
背景技术
微电网(Micro-Grid)也译为微网，是指由分布式电源、储能装置、能量转换装置、负荷、监控和保护装置等组成的小型发配电系统。微电网是一个能够实现自我控制、保护和管理的自治系统，既可以与外部电网并网运行，也可以孤立运行。微电网的提出旨在实现分布式电源的灵活、高效应用，解决数量庞大、形式多样的分布式电源并网问题。《国务院关于加强城市基础设施建设的意见》指出，要“推进城市电网智能化，以满足新能源电力、分布式发电系统并网需求，优化需求侧管理，逐步实现电力系统与用户双向互动。以提高电力系统利用率、安全可靠水平和电能质量为目标，进一步加强城市智能配电网关键技术研究与试点示范”。因此，对未来电网的要求将主要体现在绿色低碳和高效可靠两个方面。从绿色低碳的角度，电网应满足大量新能源发电的广泛性、分布式接入需求，实现电源侧清洁替代。从高效可靠的角度，电网应充分挖掘一切对维持电能供需平衡有帮助的潜在“资源”，提高电网对新能源发电的接纳能力，同时提高电能质量和供电可靠性。
传统的家庭电网结构如附图1所示，在目前家庭中，部分用电设备，如风 扇、洗衣机、洗碗机等，直接从220V市电上取电。随着家庭用电的多元化，越来越多的用电设备本质上需要的是直流电，如：计算机、笔记本、手机、电动车、直流变频空调等，需要将交流电转换为直流电后使用。中间这级AC/DC转换，大约消耗10％的电能。
传统的家庭微网如附图2所示，大部分欧美家庭采用这种结构。该结构中既有交流用电设备，也有直流用电设备。此外，新增的直流新能源模块需经过DC-AC逆变为交流电，然后又转换为直流电供给直流用电设备，这种变换方式将消耗掉20％以上的电能。
附图2所示的新能源模块，其能量的间歇性问题，将影响电能质量敏感型负载的正常运行，并影响电网的稳定性，因此新能源发电不能全部并入电网。传统的解决方案是采用蓄电池储能，但蓄电池成本较高、储能容量有限，而且频繁的充放电会缩短蓄电池的使用寿命。
现有电网以“线路”为基本调度单元，缺乏对具体用电设备的调度能力，不能主动发挥“电能质量非敏感型负载”这类宝贵“资源”对电能供需平衡的调节作用，因此在电能供需失衡时只能被动地切除某条线路上的所有负载，给被动断电的用户造成损失。在这种调度方式下，如果强行接入大量发电量随机变化的新能源，电网的可靠性将会进一步降低。同时，常规的新能源的间歇性特点导致了电网很大的稳定性冲击。
因此，需建立一种新型的交直流混用的智能家庭微网，解决上述现有技术中常规的新能源的间歇性特点导致了电网很大的稳定性冲击的技术问题。
发明内容
本发明实施例提供了一种交直流智能家庭微网协同系统及其运行方法，用于解决常规的新能源的间歇性特点导致了电网很大的稳定性冲击的技术问题，使新能源100％并网并使交直流智能家庭微网协同系统对市电呈纯阻性和分时 恒功率。
本发明实施例提供一种交直流智能家庭微网协同系统，包括交流型电能质量筛选调制器、直流型电能质量筛选调制器、功率协同模块；
交流母线通过所述交流型电能质量筛选调制器连接电能质量非敏感型负载交流母线；
直流母线通过所述直流型电能质量筛选调制器连接电能质量非敏感型负载直流母线；
所述交流型电能质量筛选调制器、所述直流型电能质量筛选调制器连接所述功率协同模块；
其中，所述功率协同模块接收由所述交流型电能质量筛选调制器和所述直流型电能质量筛选调制器检测的各母线参数并进行优化计算，得出所述电能质量非敏感型负载交流母线的电压、所述电能质量非敏感型负载直流母线的电压的最优解，并发出指令控制所述交流型电能质量筛选调制器和所述直流型电能质量筛选调制器调节所述电能质量非敏感型负载交流母线的电压、所述电能质量非敏感型负载直流母线的电压。
优选地，本发明实施例还包括电能存储模块；
所述电能存储模块连接所述直流型电能质量筛选调制器。
优选地，所述电能质量非敏感型负载交流母线连接交流型电能质量非敏感型负载；
所述电能质量非敏感型负载直流母线连接直流型电能质量非敏感型负载；
所述交流母线连接交流型电能质量敏感型负载；
所述直流母线连接直流型电能质量敏感型负载。
本发明实施例还提供一种交直流智能家庭微网系统，包括上述的交直流智能家庭微网协同系统，还包括：所述交流母线、交流子网、所述直流母线、直流子网、直流新能源子网、双向阻抗型AC/DC变换器模块；
所述交流子网包括所述交流型电能质量敏感型负载、所述交流型电能质量非敏感型负载、所述交流型电能质量筛选调制器；
所述直流子网包括所述直流型电能质量敏感型负载、所述直流型电能质量非敏感型负载、所述直流型电能质量筛选调制器。
所述交流母线分别连接市电、所述交流子网；
所述直流母线分别连接所述直流新能源子网、所述直流子网；
所述交流母线通过所述双向阻抗型AC/DC变换器模块与所述直流母线连接。
优选地，所述直流新能源子网具体为直流型新能源模块的组合，包括：光伏模块、风电模块；
优选地，所述市电通过孤岛开关与所述交流母线连接。
本发明实施例提供一种智能家庭微网系统运行方法，基于上述的智能家庭微网协同系统协同上述的智能家庭微网系统进行执行，包括：
功率协同模块接收由交流型电能质量筛选调制器检测的交流母线的电压电流参数和电能质量非敏感型负载交流母线的电压电流参数，由直流型电能质量筛选调制器检测直流母线的电压电流参数和电能质量非敏感型负载直流母线的电压电流参数；
功率协同模块根据所述交流母线的电压电流参数、电能质量非敏感型负载交流母线的电压电流参数、直流母线的电压电流参数和电能质量非敏感型负载直流母线的电压电流参数，进行优化计算，获取电能质量非敏感型负载交流母线的电压、电能质量非敏感型负载直流母线的电压的最优解；
功率协同模块根据所述最优解通过交流型电能质量筛选调制器调节电能质量非敏感型负载交流母线的电压，直流型电能质量筛选调制器调节电能质量非敏感型负载直流母线的电压。
优选地，所述进行优化计算具体为：
以交流型电能质量筛选调制器、直流型电能质量筛选调制器、双向阻抗型AC/DC变换器的功率损耗之和最小化为优化目标，以智能家庭微网系统对市电呈纯阻性和分时恒功率、新能源100％并网为约束条件，进行优化计算。
优选地，所述智能家庭微网系统还包括电能存储模块，所述智能家庭微网系统运行方法具体为：
功率协同模块接收由交流型电能质量筛选调制器检测的交流母线的电压电流参数和电能质量非敏感型负载交流母线的电压电流参数，由直流型电能质量筛选调制器检测所述电能储存模块的电压电流参数、直流母线的电压电流参数和电能质量非敏感型负载直流母线的电压电流参数；
功率协同模块根据所述交流母线的电压电流参数、电能质量非敏感型负载交流母线的电压电流参数、直流母线的电压电流参数、所述电能储存模块的电压电流参数和电能质量非敏感型负载直流母线的电压电流参数，进行优化计算，获取电能质量非敏感型负载交流母线的电压、电能质量非敏感型负载直流母线的电压、电能存储模块充放电功率的最优解；
功率协同模块根据所述最优解通过交流型电能质量筛选调制器调节电能质量非敏感型负载交流母线的电压，直流型电能质量筛选调制器调节电能质量非敏感型负载直流母线的电压、电能存储模块充放电功率。
优选地，所述进行优化计算具体为：
以交流型电能质量筛选调制器、直流型电能质量筛选调制器、双向阻抗型AC/DC变换器、电能存储模块的功率损耗之和最小化且电能存储模块使用寿命最大化为优化目标，以智能家庭微网系统对市电呈纯阻性和分时恒功率、新能源100％并网为约束条件，进行优化计算。
从以上技术方案可以看出，本发明实施例具有以下优点：
本发明实施例公开了一种交直流智能家庭微网协同系统，通过功率协同模块接收由电能质量筛选调制器检测的各母线参数并进行优化计算，进而控制电 能质量筛选调制器调节母线电流电压和功率，从而平衡新能源发电功率的随机波动，实现了交直流家庭微网系统的稳定运行，解决现有技术中常规的新能源的间歇性特点对电网造成冲击的技术问题。此外，本发明实施例还提供了一种基于交直流智能家庭微网协同系统的交直流智能家庭微网系统，解决了现有技术中交流电能需经转换才能给直流负载供电、直流电能需经二次转换才能给直流负载供电的技术问题。本发明实施例提供一种交直流智能家庭微网系统协同方法，通过功率协同模块综合分析各母线参数并进行优化计算，最后进行电压电流功率的调节，使得交直流家庭微网系统能稳定运行，使新能源100％并网并使交直流智能家庭微网协同系统对市电呈纯阻性和分时恒功率。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其它的附图。
图1为本发明用于说明背景技术的传统的家庭式电路结构图；
图2为本发明用于说明背景技术的传统的新能源家庭微网电路结构；
图3为本发明实施例提供的一种交直流智能家庭微网协同系统的原理图；
图4为本发明实施例提供的一种交直流智能家庭微网系统的原理图；
图5为本发明实施例提供的一种交直流智能家庭微网系统运行方法的流程图；
图6为本发明另一个实施例提供的一种交直流智能家庭微网系统运行方法的流程图。
其中，附图标记如下所述：
1、功率协同模块；2、交流型电能质量筛选调制器；3、直流型电能质量 筛选调制器；4、电能存储模块；5、交流型电能质量非敏感型负载；6、交流型电能质量敏感型负载；7、直流型电能质量非敏感型负载；8、直流型电能质量敏感型负载；9、双向阻抗型AC/DC变换器模块。
具体实施方式
本发明实施例提供了一种交直流智能家庭微网协同系统及其运行方法，用于平衡新能源发电功率的随机波动，实现交直流家庭微网的稳定运行，解决现有技术中常规的新能源的间歇性特点对电网造成冲击的技术问题，使新能源100％并网并使交直流智能家庭微网协同系统对市电呈纯阻性和分时恒功率。
为使得本发明的发明目的、特征、优点能够更加的明显和易懂，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，下面所描述的实施例仅仅是本发明一部分实施例，而非全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本发明保护的范围。
请参阅图3，本发明实施例提供一种交直流智能家庭微网协同系统，包括交流型电能质量筛选调制器2、直流型电能质量筛选调制器3、功率协同模块1；
交流母线通过交流型电能质量筛选调制器2连接电能质量非敏感型负载交流母线；
直流母线通过直流型电能质量筛选调制器3连接电能质量非敏感型负载直流母线；
交流型电能质量筛选调制器2、直流型电能质量筛选调制器3连接功率协同模块1；
其中，功率协同模块1接收由交流型电能质量筛选调制器2和直流型电能质量筛选调制器3检测的各母线参数并进行优化计算，得出电能质量非敏感型 负载交流母线的电压、电能质量非敏感型负载直流母线的电压的最优解，并发出指令控制交流型电能质量筛选调制器2和直流型电能质量筛选调制器3调节电能质量非敏感型负载交流母线的电压、电能质量非敏感型负载直流母线的电压。
需要说明的是，本发明实施例最终能使新能源100％并网并使交直流智能家庭微网协同系统对市电呈纯阻性和分时恒功率。
本发明实施例还包括电能存储模块4；
电能存储模块4连接直流型电能质量筛选调制器3。
电能质量非敏感型负载交流母线连接交流型电能质量非敏感型负载5；
电能质量非敏感型负载直流母线连接直流型电能质量非敏感型负载7；
交流母线连接交流型电能质量敏感型负载6；
直流母线连接直流型电能质量敏感型负载8。
具体地，交流型电能质量敏感型负载6具体为对电能质量的要求高的负载。交流型电能质量非敏感型负载5具体为对电能质量的要求不高的负载。电能质量包括电压、电流的精度、稳定性。
举个例子，交流型电能质量敏感型负载6指的是：电饭锅、计算机、洗衣机、电视、风扇等。交流型电能质量非敏感型负载5指的是：热水器、电热毯、电热水壶、建筑结冰设备等。
而直流型电能质量敏感型负载8和直流型电能质量非敏感型负载7的概念和交流型电能质量敏感型负载6和交流型电能质量非敏感型负载5类似，本领域人员能清楚识别交流与直流的区别，此处不再赘述。
以上是对本发明实施例提供的一种交直流智能家庭微网协同系统进行详细的描述，以下将对本发明实施例提供的一种交直流智能家庭微网系统进行详细的描述。
请参阅图4，本发明实施例还提供一种交直流智能家庭微网系统，包括上 述的交直流智能家庭微网协同系统，还包括：交流母线、交流子网、直流母线、直流子网、直流新能源子网、双向阻抗型AC/DC变换器模块9；
交流子网包括交流型电能质量敏感型负载6、交流型电能质量非敏感型负载5、交流型电能质量筛选调制器2；
直流子网包括直流型电能质量敏感型负载8、直流型电能质量非敏感型负载7、直流型电能质量筛选调制器3。
交流母线分别连接市电、交流子网；
直流母线分别连接直流新能源子网、直流子网；
交流母线通过双向阻抗型AC/DC变换器模块9与直流母线连接。
直流新能源子网具体为直流型新能源模块的组合，包括：光伏模块、风电模块；
市电通过孤岛开关与交流母线连接。
以上是本发明实施例提供的一种交直流智能家庭微网系统进行详细的描述，以下将对本发明实施例提供过的一种交直流智能家庭微网系统运行方法进行详细的描述。
请参阅图5，本发明实施例提供一种智能家庭微网系统运行方法，基于上述的智能家庭微网协同系统协同上述的智能家庭微网系统进行执行，包括：
101、功率协同模块接收由交流型电能质量筛选调制器检测的交流母线的电压电流参数和电能质量非敏感型负载交流母线的电压电流参数，由直流型电能质量筛选调制器检测直流母线的电压电流参数和电能质量非敏感型负载直流母线的电压电流参数；
102、功率协同模块根据所述交流母线的电压电流参数、电能质量非敏感型负载交流母线的电压电流参数、直流母线的电压电流参数和电能质量非敏感型负载直流母线的电压电流参数，进行优化计算，获取电能质量非敏感型负载交流母线的电压、电能质量非敏感型负载直流母线的电压的最优解；
103、功率协同模块根据所述最优解通过交流型电能质量筛选调制器调节电能质量非敏感型负载交流母线的电压，直流型电能质量筛选调制器调节电能质量非敏感型负载直流母线的电压。
上述步骤102中的进行优化计算具体为：
以交流型电能质量筛选调制器、直流型电能质量筛选调制器、双向阻抗型AC/DC变换器的功率损耗之和最小化为优化目标，以智能家庭微网系统对市电呈纯阻性和分时恒功率、新能源100％并网为约束条件，进行优化计算。
需要说明的是，通过交流型电能质量筛选调制器调节电能质量非敏感型负载交流母线的电压，直流型电能质量筛选调制器调节电能质量非敏感型负载直流母线的电压中运用到的技术为：用调节器来调节非敏感负载上的电压、有功、无功来实现敏感上的有功、无功和电压的稳定。
需要说明的是，分时恒功率是指智能家庭微网系统在一段时间内对市电在功率上保持恒定，比如在早上6点至8点对市电的需求功率为1000瓦。分时是指该恒定的功率能够在不同时间段保持不同的恒定值。
以上是对本发明实施例提供的一种智能家庭微网系统运行方法进行详细的描述，以下将对本发明另一个实施例提供的交直流智能家庭微网系统运行方法进行详细的描述。
请参阅图6，本发明另一个实施例提供的交直流智能家庭微网系统运行方法，基于包括电能存储模块的智能家庭微网协同系统协同智能家庭微网系统进行执行。智能家庭微网系统运行方法具体为：
201、功率协同模块接收由交流型电能质量筛选调制器检测的交流母线的电压电流参数和电能质量非敏感型负载交流母线的电压电流参数，由直流型电能质量筛选调制器检测所述电能储存模块的电压电流参数、直流母线的电压电流参数和电能质量非敏感型负载直流母线的电压电流参数；
202、功率协同模块根据所述交流母线的电压电流参数、电能质量非敏感 型负载交流母线的电压电流参数、直流母线的电压电流参数、所述电能储存模块的电压电流参数和电能质量非敏感型负载直流母线的电压电流参数，进行优化计算，获取电能质量非敏感型负载交流母线的电压、电能质量非敏感型负载直流母线的电压、电能存储模块充放电功率的最优解；
203、功率协同模块根据所述最优解通过交流型电能质量筛选调制器调节电能质量非敏感型负载交流母线的电压，直流型电能质量筛选调制器调节电能质量非敏感型负载直流母线的电压、电能存储模块充放电功率。
上述步骤202中的进行优化计算具体为：
以交流型电能质量筛选调制器、直流型电能质量筛选调制器、双向阻抗型AC/DC变换器、电能存储模块的功率损耗之和最小化且电能存储模块使用寿命最大化为优化目标，以智能家庭微网系统对市电呈纯阻性和分时恒功率、新能源100％并网为约束条件，进行优化计算。
以上是对本发明实施例提供的一种智能家庭微网协同方法进行详细的描述，以下将对本发明另一个实施例提供的一种交直流智能家庭微网系统及其运行方法进行详细的描述。
本发明另一个实施例提供一种交直流智能家庭微网系统及其运行方法，包括市电接口、孤岛开关、交流母线、交流子网、直流母线、直流子网、直流新能源子网、双向阻抗型AC/DC变换器模块9、功率协同模块1以及运行方法。
市电接口，连接到孤岛开关，孤单开关连接到交流母线；
交流母线与交流子网连接。
双向阻抗型AC/DC变换器模块9连接于交流母线与直流母线之间，实现能量的交换。
直流新能源子网连接于直流母线。
直流子网连接于直流母线。
功率协同模块1分别与交流子网与直流子网连接，实现功率的协同控制。
本发明另一个实施例提供的一种交直流智能家庭微网系统中的交流子网，指的是包括：交流型电能质量筛选调制器2、电能质量非敏感型负载交流母线、N个交流型电能质量非敏感型负载接口、交流母线上的电压与电流检测模块、M个交流型电能质量敏感型交流负载接口。
交流型电能质量筛选调制器2连接于交流母线与电能质量非敏感型负载交流母线之间；
N个交流型电能质量非敏感型负载接口连接于电能质量非敏感型负载交流母线上；
M个交流型电能质量敏感型负载接口连接于交流母线上；
交流型电能质量敏感型负载6指的是：电饭锅、计算机、洗衣机、电视、风扇等。
交流型电能质量非敏感型负载5指的是：热水器、电热毯、电热水壶、建筑结冰设备等。
而直流型电能质量敏感型负载8和直流型电能质量非敏感型负载7的概念和交流型电能质量敏感型负载6和交流型电能质量非敏感型负载5类似，本领域人员能清楚识别交流与直流的区别，此处不再赘述。
电压电流检测模块从交流母线上获取信号，并传递给功率协同模块，用于在交流型电能质量筛选调制器2无法检测交流母线的时候或者交流型电能质量筛选调制器2在设计上无法实现检测交流母线的功能时对交流母线进行检测。
本发明另一个实施例提供的一种交直流智能家庭微网中的直流子网，指的是包括：直流型电能质量筛选调制器、电能存储模块、直流母线上的电压电流检测模块、直流型电能质量非敏感型负载母线、U个直流型电能质量非敏感型负载接口、V个直流型电能质量敏感型负载接口。
直流型电能质量筛选调制器连接于直流母线与电能质量非敏感型负载直 流母线之间；
U个直流型电能质量非敏感型负载接口连接于电能质量非敏感型负载直流母线上；
V个电能质量敏感型直流负载接口连接于直流母线上；
电能存储模块连接于直流型电能质量筛选调制器上，与直流型电能质量筛选调制器相结合，实现新能源的合理分配和调制。
本发明另一个实施例提供的一种交直流智能家庭微网中的直流新能源子网，指的是包括：光伏模块、风电模块、以及其他直流型能源模块。新能源模块均连接于直流母线上。
本发明另一个实施例提供的一种交直流智能家庭微网中的双向阻抗型AC/DC变换器模块，指的是将阻抗网络置于直流母线端，进而使得AC/DC变换器获得对直流母线短路免疫的功能，提高了该微网结构的鲁棒性。
本发明另一个实施例提供的一种交直流智能家庭微网中的功率协同模块以及运行方法中的一个方面，指的是：电压电流检测模块将检测到的信号发到功率协同模块，同时，交流型电能质量筛选调制器将会检测交流母线的电压、电流和功率发给功率协同模块；交流型电能质量筛选调制器将会检测各交流敏感型负载接口的参数，并发给功率协同模块；交流型电能质量筛选调制器将会检测各交流非敏感型负载接口的参数，并发给功率协同模块。
直流型电能质量筛选调制器将会检测直流母线的电压、电流和功率发给功率协同模块；直流型电能质量筛选调制器将会检测各直流敏感型负载接口的参数，并发给功率协同模块；直流型电能质量筛选调制器将会检测各直流非敏感型负载接口的参数，并发给功率协同模块。
直流型电能质量筛选调制器将会检测电能存储模块的参数，并发给功率协同模块。
功率协同模块在收到上述的数据后，以家庭微网系统对市电呈现纯阻性和 分时恒功率、新能源完全并网为约束条件，以交流型电能质量筛选调制器、直流型电能质量筛选调制器、双向阻抗型AC/DC变换器、电能存储模块的功率损耗之和最小化，且电能存储模块使用寿命最大化为优化目标，进行优化计算，获得电能质量非敏感型负载交流母线电压、电能质量非敏感型负载直流母线电压和电能存储模块充放电功率的最优解，并分别传递给交流型电能质量筛选调制器、直流型电能质量筛选调制器进行实施控制。
本发明另一个实施例提供的一种交直流智能家庭微网中的运行方法包括通过对双向阻抗型AC/DC变换器模块9的控制，将直流母线电压维持在额定值。
需要说明的是，与现有技术相比，本发明是通过在现有电网结构的基础上，增加直流母线及相应的双向阻抗型AC/DC变换器以构成交直流混用的智能家庭微网，并将负载分为电能质量敏感型负载和电能质量非敏感型负载，通过相应的电能质量筛选调制器调节电能质量非敏感型负载的功率，以平衡新能源发电功率的随机波动，在确保电能质量敏感型负载稳定运行的同时使得整个微网对市电呈现纯阻性和分时恒功率，提高上级电网的稳定运行能力。此外，本发明还有效避免了传统新能源模块多级能量变换(直流-交流-直流)低效率的缺点。
本发明所提出的一种交直流智能家庭微网及其运行方法，通过充分利用电能质量非敏感型负载这类宝贵的储能资源，在保证新能源发电充分利用的同时，使整个微网对市电呈现纯阻性和分时恒功率，在理论上使得家庭电网对上级电网实现零污染。
需要说明的是，本发明能使新能源100％并网并使交直流智能家庭微网协同系统对市电呈纯阻性和分时恒功率。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统，装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程， 在此不再赘述。
以上所述，以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims (10)

  1. 一种交直流智能家庭微网协同系统，其特征在于，包括交流型电能质量筛选调制器、直流型电能质量筛选调制器、功率协同模块；
    交流母线通过所述交流型电能质量筛选调制器连接电能质量非敏感型负载交流母线；
    直流母线通过所述直流型电能质量筛选调制器连接电能质量非敏感型负载直流母线；
    所述交流型电能质量筛选调制器、所述直流型电能质量筛选调制器连接所述功率协同模块；
    其中，所述功率协同模块接收由所述交流型电能质量筛选调制器和所述直流型电能质量筛选调制器检测的各母线参数并进行优化计算，得出所述电能质量非敏感型负载交流母线的电压、所述电能质量非敏感型负载直流母线的电压的最优解，并发出指令控制所述交流型电能质量筛选调制器和所述直流型电能质量筛选调制器调节所述电能质量非敏感型负载交流母线的电压、所述电能质量非敏感型负载直流母线的电压。
  2. 根据权利要求1所述的交直流智能家庭微网协同系统，其特征在于，还包括电能存储模块；
    所述电能存储模块连接所述直流型电能质量筛选调制器。
  3. 根据权利要求1所述的交直流智能家庭微网协同系统，其特征在于，所述电能质量非敏感型负载交流母线连接交流型电能质量非敏感型负载；
    所述电能质量非敏感型负载直流母线连接直流型电能质量非敏感型负载；
    所述交流母线连接交流型电能质量敏感型负载；
    所述直流母线连接直流型电能质量敏感型负载。
  4. 一种交直流智能家庭微网系统，其特征在于，包括如权利要求1至3任意一项所述的交直流智能家庭微网协同系统，还包括：所述交流母线、交流 子网、所述直流母线、直流子网、直流新能源子网、双向阻抗型AC/DC变换器模块；
    所述交流子网包括所述交流型电能质量敏感型负载、所述交流型电能质量非敏感型负载、所述交流型电能质量筛选调制器；
    所述直流子网包括所述直流型电能质量敏感型负载、所述直流型电能质量非敏感型负载、所述直流型电能质量筛选调制器；
    所述交流母线分别连接市电、所述交流子网；
    所述直流母线分别连接所述直流新能源子网、所述直流子网；
    所述交流母线通过所述双向阻抗型AC/DC变换器模块与所述直流母线连接。
  5. 根据权利要求4所述的智能家庭微网系统，其特征在于，所述直流新能源子网具体为直流型新能源模块的组合，包括：光伏模块、风电模块。
  6. 根据权利要求4所述的智能家庭微网系统，其特征在于，所述市电通过孤岛开关与所述交流母线连接。
  7. 一种智能家庭微网系统运行方法，基于如权利要求1至3中任意一项所述的智能家庭微网协同系统协同基于如权利要求4至6中任意一项所述的智能家庭微网系统进行执行，其特征在于，包括：
    功率协同模块接收由交流型电能质量筛选调制器检测的交流母线的电压电流参数和电能质量非敏感型负载交流母线的电压电流参数，由直流型电能质量筛选调制器检测直流母线的电压电流参数和电能质量非敏感型负载直流母线的电压电流参数；
    功率协同模块根据所述交流母线的电压电流参数、电能质量非敏感型负载交流母线的电压电流参数、直流母线的电压电流参数和电能质量非敏感型负载直流母线的电压电流参数，进行优化计算，获取电能质量非敏感型负载交流母线的电压、电能质量非敏感型负载直流母线的电压的最优解；
    功率协同模块根据所述最优解通过交流型电能质量筛选调制器调节电能质量非敏感型负载交流母线的电压，直流型电能质量筛选调制器调节电能质量非敏感型负载直流母线的电压。
  8. 根据权利要求7所述的一种智能家庭微网系统运行方法，其特征在于，所述进行优化计算具体为：
    以交流型电能质量筛选调制器、直流型电能质量筛选调制器、双向阻抗型AC/DC变换器的功率损耗之和最小化为优化目标，以智能家庭微网系统对市电呈纯阻性和分时恒功率、新能源100％并网为约束条件，进行优化计算。
  9. 根据权利要求7所述的一种智能家庭微网系统运行方法，其特征在于，所述智能家庭微网系统还包括电能存储模块，所述智能家庭微网系统运行方法具体为：
    功率协同模块接收由交流型电能质量筛选调制器检测的交流母线的电压电流参数和电能质量非敏感型负载交流母线的电压电流参数，由直流型电能质量筛选调制器检测所述电能储存模块的电压电流参数、直流母线的电压电流参数和电能质量非敏感型负载直流母线的电压电流参数；
    功率协同模块根据所述交流母线的电压电流参数、电能质量非敏感型负载交流母线的电压电流参数、直流母线的电压电流参数、所述电能储存模块的电压电流参数和电能质量非敏感型负载直流母线的电压电流参数，进行优化计算，获取电能质量非敏感型负载交流母线的电压、电能质量非敏感型负载直流母线的电压、电能存储模块充放电功率的最优解；
    功率协同模块根据所述最优解通过交流型电能质量筛选调制器调节电能质量非敏感型负载交流母线的电压，直流型电能质量筛选调制器调节电能质量非敏感型负载直流母线的电压、电能存储模块充放电功率。
  10. 根据权利要求9所述的一种智能家庭微网系统运行方法，其特征在于，所述进行优化计算具体为：
    以交流型电能质量筛选调制器、直流型电能质量筛选调制器、双向阻抗型AC/DC变换器、电能存储模块的功率损耗之和最小化且电能存储模块使用寿命最大化为优化目标，以智能家庭微网系统对市电呈纯阻性和分时恒功率、新能源100％并网为约束条件，进行优化计算。
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