WO2022252382A1 - 一种源网荷储网络化协调频率控制方法 - Google Patents

一种源网荷储网络化协调频率控制方法 Download PDF

Info

Publication number
WO2022252382A1
WO2022252382A1 PCT/CN2021/109632 CN2021109632W WO2022252382A1 WO 2022252382 A1 WO2022252382 A1 WO 2022252382A1 CN 2021109632 W CN2021109632 W CN 2021109632W WO 2022252382 A1 WO2022252382 A1 WO 2022252382A1
Authority
WO
WIPO (PCT)
Prior art keywords
power
load
distribution system
source
grid
Prior art date
Application number
PCT/CN2021/109632
Other languages
English (en)
French (fr)
Inventor
岳东
窦春霞
张智俊
岳文斌
丁孝华
罗剑波
李延满
黄堃
韩韬
Original Assignee
南京邮电大学
国网电力科学研究院有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 南京邮电大学, 国网电力科学研究院有限公司 filed Critical 南京邮电大学
Priority to US17/997,537 priority Critical patent/US20240055859A1/en
Publication of WO2022252382A1 publication Critical patent/WO2022252382A1/zh

Links

Images

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46Controlling of the sharing of output between the generators, converters, or transformers
    • H02J3/48Controlling the sharing of the in-phase component
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/24Arrangements for preventing or reducing oscillations of power in networks
    • H02J3/241The oscillation concerning frequency
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28Arrangements for balancing of the load in a network by storage of energy
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2203/00Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/10Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20The dispersed energy generation being of renewable origin
    • H02J2300/22The renewable source being solar energy
    • H02J2300/24The renewable source being solar energy of photovoltaic origin
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20The dispersed energy generation being of renewable origin
    • H02J2300/28The renewable source being wind energy
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/40Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation wherein a plurality of decentralised, dispersed or local energy generation technologies are operated simultaneously
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion systems, e.g. maximum power point trackers

Definitions

  • the invention relates to a source-network-load-storage network coordinated frequency control method, which belongs to the technical field of secondary frequency regulation of distribution networks.
  • the frequency of the power system is an important indicator to measure the quality of power energy and an important guarantee for the normal and reliable operation of the power system. It reflects the balance between the active power of power generation and the load, and plays a key role in the operation of the power system. , is an important control parameter for the operation of the power system. It is related to the efficiency and safety of a large number of users' power equipment and many power generation and power supply equipment itself, and is closely related to our daily life.
  • the current dispatching plate of the power grid adopts the traditional dispatching mode of "source follows the load and only adjusts the centralized power generation". It mainly dispatches the centralized power generation and the power grid, while the load, energy storage and nearby external power supply systems are not included in the dispatching category.
  • the proportion of new energy increases year by year, the proportion of new loads such as electric vehicles and energy storage equipment continues to rise, new forms of energy consumption such as load aggregators and smart buildings continue to emerge, new changes have taken place in the operating characteristics of the power grid, and the frequency regulation situation is becoming more and more severe.
  • the difficulty of power grid operation and regulation is increasing, and the existing dispatching mode is gradually difficult to meet the new frequency regulation needs.
  • the traditional dispatching mode will shed a large number of loads due to insufficient frequency regulation capability, which will lead to problems such as equipment overload and cross-section violation.
  • the purpose of the present invention is to overcome the deficiencies in the prior art, and provide a source-grid-load-storage network coordinated frequency control method, which can realize the balance of power supply and demand, timely adjust according to the frequency change of the power grid, and coordinate and control the stable operation of the power grid.
  • the present invention is achieved by adopting the following technical solutions:
  • the present invention provides a source-network-load-storage network coordinated frequency control method, including:
  • the source, network, load and storage of the power distribution system perform frequency modulation, distribute the power adjustment amount, and judge whether the total amount of active power required can be met after frequency modulation;
  • the power distribution system includes a source network load storage, a backup energy storage power station and adjacent external systems
  • the source network load storage includes: a wind power station, a photovoltaic power station, a microgrid group, an adjustable load, and an energy storage station.
  • control method described in the present invention is applicable to the distribution network active response mode and the distribution network passive response mode.
  • the total amount of active power ⁇ P that needs to be regulated in the power distribution system during the second frequency regulation process of the power grid is obtained, including:
  • the power distribution system In the active response mode, the power distribution system actively responds to calculate the power balance ⁇ P that the distribution network system needs to make up according to the frequency deviation after a frequency adjustment; in the passive response mode, the power distribution system obtains the power adjustment amount ⁇ P issued by the power dispatching system ; ⁇ P is the total amount of active power to be obtained.
  • the grid frequency is subjected to disturbance detection according to the following inequality:
  • f s,t represents the instantaneous real-time frequency of the power grid at time t; f 0 represents the rated frequency of the power grid; a 1 is the threshold value of the frequency change amount for setting the power grid frequency acquisition; b 1 is the frequency change for setting the power grid frequency acquisition rate threshold.
  • the power difference ⁇ P that the distribution network system needs to make up is calculated according to each unit inside the power distribution system:
  • Energy storage power station calculates work:
  • ⁇ f is the difference between the current frequency of the power grid system and the rated frequency
  • x, y, z, and m are the numbers of individual units of the distribution system wind power plant, photovoltaic power plant, micro-grid group, and energy storage power plant
  • ⁇ P wind power plant i is the adjusted output power of the i-th wind turbine in the wind power station
  • ⁇ P photovoltaic power station j is the adjusted output power of the j-th photovoltaic panel in the photovoltaic power station
  • ⁇ P microgrid a is the output power of the ath microgrid in the microgrid group
  • the output power to be adjusted
  • ⁇ T energy storage power station b is the adjusted output power of the bth energy storage battery in the energy storage power station
  • k wind turbine power station i is the adjustment coefficient of the i-th fan in the wind turbine power station
  • k photovoltaic power station j is the differential adjustment coefficient of the jth photovoltaic panel in the photovolt
  • the source, network, load, and storage of the power distribution system can meet the total amount of active power required after coordinated operation;
  • the adjustable total amount of source, grid, load, and storage active power of the power distribution system is calculated by the following formula:
  • max WT represents the maximum adjustable capacity of the distribution system wind power plant
  • max PV represents the maximum adjustable capacity of the distribution system photovoltaic power station
  • max CDER represents the maximum adjustable capacity of the distribution system microgrid
  • max ESU represents the distribution system
  • C is the maximum adjustable capacity of the total source network load storage of the power distribution system, which means the adjustable total amount C of the source network load storage active power of the power distribution system.
  • the assignment of power adjustment tasks for the first generation source is carried out, and the assignment method is as follows:
  • chengji is the product of the adjustment coefficients of all wind power plants, photovoltaic power plants, micro-grid groups, and energy storage power stations in the power distribution system
  • Y is the removal of wind power plants, photovoltaic power plants
  • micro-grid power PWT j is the estimated distribution value of the jth fan in the wind power station
  • PPV j is the estimated value of the jth photovoltaic panel in the photovoltaic power station.
  • Distributed work value PCDER j is the expected distributed work value calculated by the jth microgrid of the microgrid
  • PESU j is the estimated distributed work value obtained by the jth energy storage battery of the energy storage power station.
  • Adjust the power output of the power generation unit that has exceeded the limit to the maximum value, and the other power generation units in the power distribution system source, network, load and storage will re-correct the power distribution according to the inverse ratio of the difference coefficient of the power generation unit that exceeds the limit;
  • the adjustable total active power of all power generation units still does not meet the total active power ⁇ P that needs to be adjusted, and the energy storage power station is called to make up for the remaining insufficient active power;
  • the standby energy storage power station in the power distribution system is called to make up for the remaining insufficient active power, so that the active power of the power distribution system is balanced and the grid frequency regulation is completed.
  • the total amount of active power ⁇ P that needs to be regulated is still not satisfied, and the expression of calling the backup energy storage power station in the power distribution system to make up for the remaining insufficient active power is:
  • max bESU is the maximum output value of the backup energy storage
  • PbESU is the actual output value of the backup energy storage
  • the adjustable capacity of each power generation unit, microgrid group, and energy storage power station in the power distribution system source network load storage is adjusted to the maximum value, which does not meet the total amount of active power ⁇ P that needs to be regulated, and the backup storage in the power distribution system is called
  • the expression for making up the remaining insufficient active power of the power station is:
  • max bESU is the maximum output value of the backup energy storage
  • PbESU is the actual output value of the backup energy storage
  • the adjustable load of the source network, load and storage is deployed to reduce or increase the consumption of active power.
  • adjusting the adjustable load of the source network, load and storage includes: comparing the total active power ⁇ P required for frequency regulation of the distribution network with the size of the distribution system source network storage plus backup energy storage plus adjustable load capacity.
  • the adjustable capacity of each power generation unit, microgrid group, and energy storage power station in the power distribution system source, network, load, and storage is adjusted to the maximum value, and the standby energy storage power station in the power distribution system does not meet the total active power that needs to be regulated.
  • ⁇ P the expression of the total amount of active power ⁇ P that can be adjusted to the maximum value to meet the needs of regulation is:
  • the expression of the adjustable load for deploying the source network, load and storage is:
  • max aload is the maximum adjustment value of the adjustable load
  • aload is the actual adjustment value of the adjustable load
  • the adjacent external system is called to second the active power of other distribution networks to make up for the remaining deficiency The shortfall of active power.
  • calling the adjacent external system includes: comparing the total active power ⁇ P required for frequency regulation of the distribution network with the distribution system source network load storage plus backup energy storage plus adjustable load capacity plus the size of the external system; setting The secondment value of the external system.
  • the source, network, load, and storage of the power distribution system are adjusted to the maximum adjustable capacity, and the backup energy storage power station and adjustable load are adjusted to the maximum value, which still does not meet the total amount of active power ⁇ P that needs to be regulated, and the expression of the adjacent external system is called The formula is:
  • max waibu is the maximum scheduling value of the external adjacent system
  • waibu is the actual scheduling value of the external adjacent system
  • it also includes allocating the adjusted active power of each unit of the power distribution system according to the principle of economy when calling the backup energy storage power station, deploying the adjustable load, and calling the adjacent external system for active power compensation.
  • the economic optimal principle includes: the standby energy storage power station refers to the annual historical power generation data and failure rate, sorts and uses it according to the high power generation and low failure rate; the adjustable load refers to the load importance level and the call compensation cost, The importance is low and the compensation cost is sorted and used.
  • the adjacent external system refers to the real-time electricity price and dispatch loss, and is sorted and used according to the high energy utilization rate and low dispatch cost.
  • the occurrence of power exceeding the limit of the power generation unit is that the allocated power regulation amount is higher or lower than the boundary of the regulation capacity of the power generation unit.
  • the beneficial effects achieved by a source-network-load-storage network coordinated frequency control method include:
  • the present invention acquires the total amount of active power ⁇ P that needs to be regulated during the secondary frequency modulation process of the power distribution system; according to the obtained total amount of active power, the source, network, load, and storage of the power distribution system perform frequency modulation, and the present invention can reasonably adjust the power generation source,
  • the output power of microgrid, load and energy storage compensates the power difference, maintains the output power and output frequency of each power generation source within the allowable range, and can cope with long-term load disturbance;
  • the composition of the present invention plays the role of power distribution system regulation Advantages, it can supply power from an external system and can withstand large load disturbances;
  • the invention takes into account the rapidity and continuity of new energy frequency modulation, uses new energy resources, solves the shortage of fast frequency modulation resources in regional power distribution systems, frequent system frequency fluctuations under long-term small interference, and copes with equipment overload caused by large frequency modulation load shedding It can realize the balance of power supply and demand, timely adjust according to the frequency change of the power grid, and coordinate and control the stable operation of the power grid.
  • FIG. 1 is a flow chart of a source-network-load-storage network coordination frequency control method provided in an embodiment of the present invention
  • Fig. 2 is a frame diagram of a power distribution system in a source-grid-load-storage network coordinated frequency control method provided by an embodiment of the present invention
  • Fig. 3 is a simulation result of a source-grid-load-storage network coordinated frequency control method provided by an embodiment of the present invention.
  • a source-network-load-storage network coordinated frequency control method includes:
  • the source, network, load and storage of the power distribution system perform frequency modulation, distribute the power adjustment amount, and judge whether the total amount of active power required can be met after frequency modulation;
  • Step 1 Obtain the total amount of active power ⁇ P that needs to be regulated during the secondary frequency regulation of the power distribution system.
  • the power distribution system receives an instruction to adjust the power of the upper power system. Detect the frequency disturbance of the grid. When the frequency disturbance of the grid exceeds the rated error value, the grid frequency at the current moment is collected. In the active response mode, the power distribution system actively responds to the frequency deviation after a frequency adjustment and calculates the compensation required by the distribution network system. Power difference ⁇ P; in the passive response mode, the power distribution system obtains the power adjustment value ⁇ P issued by the power dispatching system; ⁇ P is the total amount of active power to be obtained.
  • Step 2 Collect the data information of the internal power generation unit of the power distribution system.
  • the current forecasted power generation data information of wind power plants and photovoltaic power plants inside the power distribution system is obtained, the capacity information of the energy storage power plants inside the power distribution system is obtained, and the current adjustable power range of the micro-grid within the power distribution system is obtained.
  • the power distribution system includes: x fan power stations, y photovoltaic power stations, z microgrids, m energy storage power stations, n backup energy storage power stations, and l adjustable loads , h adjacent power supply systems; among them, the maximum up-regulated capacity of the wind power station is max WT, the maximum up-regulated capacity of the photovoltaic power station is max PV, the maximum up-regulated capacity of the microgrid is max CDER, and the maximum up-regulated capacity of the energy storage power station is max ESU, The maximum upward adjustment capacity of the backup energy storage power station is max bESU, the maximum upward adjustment capacity of the adjustable load is max aload, and the maximum upward adjustment capacity of the adjacent external system is max waibu.
  • the maximum up-regulated capacity of the wind power station is max WT
  • the maximum up-regulated capacity of the photovoltaic power station is max PV
  • the maximum up-regulated capacity of the microgrid is max CDER
  • the maximum up-regulated capacity of the energy storage power station is max ESU
  • Step 3 Collect the adjustment coefficient data of the internal power generation unit of the power distribution system.
  • the respective adjustment coefficient values of the wind turbine power station, photovoltaic power station, microgrid and energy storage power station in the power distribution system are obtained.
  • the differential coefficient of the wind power station is kWT
  • the differential coefficient of the photovoltaic power station is kPV
  • the differential coefficient of the microgrid is kCDER
  • the differential coefficient of the energy storage power station is kESU.
  • Step 4 Calculate the total amount of active power adjustment of the distribution system source network load storage.
  • max WT indicates the maximum adjustable capacity of the distribution system wind power plant
  • max PV indicates the maximum adjustable capacity of the distribution system photovoltaic power station
  • max CDER indicates the maximum adjustable capacity of the distribution system microgrid
  • max ESU indicates the distribution system
  • C is the maximum adjustable capacity of the total source network load storage of the power distribution system, which means the adjustable total amount C of the source network load storage active power of the power distribution system.
  • the fan power plant and the photovoltaic power plant in the power distribution system are set to meet the power regulation requirements.
  • Step 5 According to the data information of the difference adjustment coefficients of the respective power generation sources inside the power distribution system, the total active power to be adjusted by the power distribution system is allocated to each power generation source of the power distribution system.
  • chengji is the product of the adjustment coefficient of all wind power plants, photovoltaic power plants, micro-grid groups, and energy storage power stations in the power distribution system;
  • PWT j is the expected distributed power value calculated by the jth fan of the wind power plant
  • PPV j is the predicted distributed power value calculated by the jth photovoltaic panel of the photovoltaic power station
  • PCDER j is the expected distributed work value calculated by the jth microgrid of the microgrid
  • PESU j is the estimated distributed work value obtained by the calculation of the jth energy storage battery of the energy storage power station.
  • the output value of the result, the estimated output value PbESU, aload, and Pwaibu of the backup energy storage, adjustable load, and backup system are set to 0. Then the unit is found.
  • the other power generation units in the wind power station, photovoltaic power station, micro-grid, and energy storage power station are set according to the inverse ratio of their own adjustment coefficient and the second photovoltaic panel adjustment coefficient in the photovoltaic power station. The calculation is as follows:
  • PWT i , PPV i , PCDER i , and PESU i are the power output values of each single unit in the wind power plant, photovoltaic power plant, microgrid, and energy storage power plant, respectively.
  • Step 6 Collect information on the backup energy storage capacity of the power distribution system, and use the backup energy storage to make up the difference when the power of the power distribution system's source network load storage power generation unit exceeds the limit.
  • the backup energy storage power station does not need to fully participate in the power generation. According to the capacity of the backup energy storage power station, the call cost of the failure rate and other data, the output sequence is planned in advance through the comprehensive economic criteria, and the backup energy storage power stations are called in order according to the principle of the lowest output cost.
  • the capacity of the backup energy storage power station is not enough to make up for the power shortage caused by the redistribution of power generation by the power generation unit of the power distribution system. Whether the backup energy storage and adjustable load can meet the total amount of active power ⁇ P that the distribution system needs to regulate.
  • Step 7 Collect information on the adjustable load and adjustable capacity of the distribution system. If the power exceeds the limit in the power distribution system source network load storage power generation unit, the preset adjustable capacity of the source network load storage plus the total capacity of the backup energy storage power station is insufficient In most cases, the dispatch of adjustable loads is used to make up for the difference in active power.
  • the fan power station, photovoltaic power station, micro-grid, and energy storage power station of the power distribution system are set to the preset adjusted output value
  • the adjusted value of the adjustable load is set to the total amount of active power ⁇ P that needs to be regulated by the power distribution system and
  • the difference between the preset adjustment output values of fan power plants, photovoltaic power plants, micro-grids, energy storage power plants, and backup energy storage power plants in the power distribution system namely:
  • the adjustable loads do not need to be fully involved in the adjustment. According to the reference indicators such as the type, importance, and compensation cost of the adjustable loads, the scheduling sequence is planned in advance, and the loads are scheduled to make up for the gap according to the principle of the lowest total scheduling cost of the load.
  • Step 8 Collect the information on the adjustable capacity of the adjacent external systems of the power distribution system. If the power of the power distribution system source network load storage power generation unit exceeds the limit, the preset adjustable capacity of the source network load storage plus the backup energy storage power station, When the total capacity of the load regulation is insufficient, the adjacent external system is called to borrow the active power of other distribution networks to make up for the remaining insufficient active power.
  • the collaborative interaction of wind power plants, photovoltaic power plants, micro-grids, energy storage power stations, backup energy storage power stations, adjustable loads and adjacent external power supply systems in the power distribution system can make up for the loss caused by redistribution of power generation units in the power distribution system.
  • microgrid, and energy storage power station are set to the preset adjusted power output value
  • the dispatch value of the external adjacent system is set to the total amount of active power ⁇ P that needs to be regulated by the distribution system and the distribution system of the fan power station, photovoltaic power station, and microgrid , energy storage power station, and backup energy storage power station, that is, the difference between the preset adjustable output value of the adjustable load, namely:
  • Adjacent external systems plan the deployment sequence in advance according to the indicators such as real-time electricity price, deployment distance, etc., according to the economic index with the lowest cost of comprehensively calling electricity, and call them in sequence according to the economy.
  • Figure 3 shows the output results of each power generation unit and other units of the power distribution system in the actual simulation process when the load of the distribution network increases suddenly, the bus frequency decreases, the frequency needs to be adjusted up and the frequency of some units in the photovoltaic power station exceeds the limit .
  • the simulation results show that the method provided by the present invention can comprehensively utilize resources such as power generation sources, microgrids, loads, energy storage and adjacent systems of the power distribution system, reasonably allocate power shortages according to the difference adjustment coefficients of each unit, and ensure that the power distribution system is in each unit. It can cope with long-term frequency disturbances and large-value active power shortages without exceeding the output power limit.
  • the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions
  • the device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

源网荷储网络化协调频率控制方法,所述方法包括:获取配电系统在电网二次调频过程中需要调控的有功功率总量ΔP;根据有功功率总量,配电系统的源网荷储进行调频,分配功率调节量,判断调频后能否满足需要的有功功率总量;若能满足,判断发电单元是否发生功率越限:若未发生功率越限,配电系统的有功功率平衡,完成电网频率调节;若发生功率越限,修正源网荷储各发电单元的功率调节量并补足功率差额,使配电系统的有功功率平衡,完成电网频率调节;若不能满足,协调源网荷储和配电系统中其他资源,使配电系统的有功功率平衡,完成电网频率调节。能够根据电网频率变化进行适时调节,协调控制电网稳定运行。

Description

一种源网荷储网络化协调频率控制方法 技术领域
本发明涉及一种源网荷储网络化协调频率控制方法,属于配电网二次调频技术领域。
背景技术
随着大容量机组在电网中的比例不断增加,用结构变化引起负荷峰谷差逐步加大,而用户对电能质量的要求却在不断提高,电网频率稳定性的问题越来越受到重视。电力系统的频率是衡量电能质量的一大重要指标,是电力系统的正常可靠运行的一个重要保障,它反映了发电有功功率和负荷二者的平衡关系,对电力系统运行起着关键性的作用,更是电力系统运行好坏的重要控制参数,关系着大量用户的电力设备以及很多发电供电设备本身的效率和安全,与我们的日常生活息息相关。
当前电网调度极板采取“源随荷动、只调整集中式发电”的传统调度模式,主要调度集中式发电和电网,负荷和储能以及临近的外部可供电系统暂未纳入调度范畴。随着新能源占比逐年提高,电动汽车、储能设备等新型负荷比重不断上升,负荷聚合商、智能楼宇等新的用能形式不断涌现,电网运行特性发生新的变化,调频形势愈发严峻,电网运行调控难度不断增大,现有的调度模式逐渐难以解决新的调频需求,亟需从多样性、灵活性、协同性等方面优化完善运行调控手段,进一步解决电网安全运行问题和清洁能源消纳问题,实现社会综合效益最大化。传统调度模式因调频能力不足会切除大量负荷,会导致设备过载、断面越限等问题。
国家以大电网安全和日前电力平衡为重点,在精准负荷控制以及需求响应 等方面进行了负荷调控的实践探索,积累了较多的经验,部分解决了电网安全问题和平衡问题。但是在源网荷储协同控制技术应用方面依然存在明显不足。尤其是目前国内缺乏针对地区电网的从电网全局层面进行源网荷储多元协调的控制方法。
发明内容
本发明的目的在于克服现有技术中的不足,提供一种源网荷储网络化协调频率控制方法,能够实现功率供需平衡,能够根据电网频率变化进行适时调节,协调控制电网稳定运行。为达到上述目的,本发明是采用下述技术方案实现的:
第一方面,本发明提供了一种源网荷储网络化协调频率控制方法,包括:
获取配电系统在电网二次调频过程中需要调控的有功功率总量ΔP;
根据获取到的有功功率总量,配电系统的源网荷储进行调频,分配功率调节量,判断调频后能否满足需要的有功功率总量;
若能满足需要的有功功率总量,判断发电单元是否发生功率越限:
若未发生功率越限,配电系统的有功功率平衡,完成电网频率调节;
若发生功率越限,修正源网荷储各发电单元的功率调节量并补足功率差额,使配电系统的有功功率平衡,完成电网频率调节;
若不能满足需要的有功功率总量,协调源网荷储和配电系统中其他资源,使配电系统的有功功率平衡,完成电网频率调节。
进一步地,所述配电系统包括源网荷储、备用储能电站及相邻外部系统,所述源网荷储包括:风机电站、光伏电站、微电网群、可调负荷、储能电站。
优选地,本发明所述的控制方法适用于配电网主动响应模式和配电网被动响应模式。
进一步地,获取配电系统在电网二次调频过程中需要调控的有功功率总量ΔP,包括:
对电网频率扰动进行检测,当电网发生频率扰动超越额定误差值时,采集当前时刻电网频率;
在主动响应模式下,配电系统根据一次调频后的频率偏差主动响应计算配网系统所需要补足的功率差额ΔP;在被动响应模式下,配电系统获取电力调度系统下发的功率调节量ΔP;ΔP即为要获取的有功功率总量。
优选地,依据以下不等式对电网频率进行扰动检测:
|f s,t-f 0|≥a 1   (1)
Figure PCTCN2021109632-appb-000001
其中,f s,t表示t时刻电网瞬时实时频率;f 0表示电网额定频率;a 1为设定开启电网频率采集的频率变化量阀值;b 1为设定的开启电网频率采集的频率变化速率阀值。
优选地,在主动响应模式下,配网系统所需要补足的功率差额ΔP根据配电系统内部各单元计算得到:
风机电站计算出功:
Figure PCTCN2021109632-appb-000002
光伏电站计算出功:
Figure PCTCN2021109632-appb-000003
微电网群计算出功:
Figure PCTCN2021109632-appb-000004
储能电站计算出功:
Figure PCTCN2021109632-appb-000005
总出功:
Figure PCTCN2021109632-appb-000006
其中,Δf为电网系统当前频率距额定频率的差值,x、y、z、m分别为配电系统风机电站、光伏电站、微电网群、储能电站各自单元的个数;ΔP 风机电站i为风机电站中第i个风机所需调节的出功,ΔP 光伏电站j为光伏电站中第j个光伏板所需调节的出功,ΔP 微电网a为微电网群中第a个微电网所需调节的出功,ΔT 储能电站b为储能电站中第b个储能电池所需调节的出功;k 风机电站i为风机电站中第i个风机的调差系数,k 光伏电站j为光伏电站中第j个光伏板的调差系数,k 微电网a为微电网群中第a个微电网的调差系数,k 储能电站b为储能电站中第b个储能电池的调差系数;ΔP为配电网系统所需调节有功功率总量。
进一步地,判断配电系统的源网荷储调频后能否满足需要的有功功率总量,包括:
计算配电系统源网荷储有功功率可调节总量C;
比较获取的有功功率总量ΔP与计算得到的配电系统源网荷储有功功率可调节总量C的大小;
若ΔP≤C,则配电系统的源网荷储协调运行后能满足需要的有功功率总量;
若ΔP>C,则配电系统的源网荷储协调运行后不能满足需要的有功功率总量。
优选地,计算配电系统源网荷储有功功率可调节总量,通过下式计算:
Figure PCTCN2021109632-appb-000007
其中,max WT表示配电系统风机电站的最大可调容量,max PV表示配电系统光伏电站的最大可调容量,max CDER表示配电系统微电网的最大可调容量, max ESU表示配电系统储能电站的最大可调容量,C为配电系统源网荷储总的最大可调容量,表示配电系统源网荷储有功功率可调节总量C。
优选地,基于源、网、荷、储的调差系数,进行第一次发电源功率调节任务的分配,分配方式如下:
Figure PCTCN2021109632-appb-000008
Y i=chengji÷kWT j,i=j=(1,2,…,x)   (10)
Y i=chengji÷kPV j,i=(x+1,x+2,…,x+y),j=(1,2,…,y)   (11)
Y i=chengji÷kCDER j,i=(x+y+1,x+y+2,…,x+y+z),j=(1,2,…,z)   (12)
Y i=chengji÷kESU j,i=(x+y+z+1,x+y+z+2,…,x+y+z+m),j=(1,2,…,m)   (13)
Figure PCTCN2021109632-appb-000009
PWT j=ΔP×(Y i÷Total),i=j=(1,2,…,x)  (15)
PPV j=ΔP×(Y i÷Total),i=(x+1,x+2,…,x+y),j=(1,2,…,y)   (16)
PCDER j=ΔP×(Y i÷Total),i=(x+y+1,x+y+2,…,x+y+z),j=(1,2,…,z)   (17)
PESU j=ΔP×(Y i÷Total),i=(x+y+z+1,x+y+z+2,…,x+y+z+m),j=(1,2,…,m)   (18)其中,chengji为配电系统所有风机电站、光伏电站、微电网群、储能电站调差系数的乘积;Y为移除配电系统风机电站、光伏电站、微电网、储能电站中某个特定单元后调差系数的乘积;PWT j为风机电站第j个风机通过计算得出的预计分配出功数值,PPV j为光伏电站第j个光伏板通过计算得出的预计分配出功数值,PCDER j为微电网第j个微电网通过计算得出的预计分配出功数值,PESU j为储能电站第j个储能电池通过计算得出的预计分配出功数值。
进一步地,若发生功率越限,修正源网荷储各发电单元的功率调节量并补 足功率差额,包括:
将发生功率越限行为的发电单元的出功量调至最大值,配电系统源网荷储中其他发电单元按照与越限发电单元调差系数的反比进行功率分配的再修正;
检查修正后的其他发电单元是否发生功率越限,修正发生功率越限的发电单元,直到全部发电单元的功率越限问题都解决;
当修正后所有发电单元的有功功率可调节总量仍不满足需要调控的有功功率总量ΔP,调节微电网群的功率分配;
当微电网群的功率重新分配后,所有发电单元的有功功率可调节总量仍不满足需要调控的有功功率总量ΔP,调用储能电站补足剩余不足的有功功率;
当调用储能电站仍不满足需要调控的有功功率总量ΔP,调用配电系统中备用储能电站补足剩余不足的有功功率,使配电系统的有功功率平衡,完成电网频率调节。
优选地,修正有功功率、微电网重新分配、调用储能电站后仍不满足需要调控的有功功率总量ΔP,调用配电系统中备用储能电站补足剩余不足的有功功率的表达式为:
Figure PCTCN2021109632-appb-000010
Figure PCTCN2021109632-appb-000011
其中,max bESU为备用储能最大出功数值,PbESU为备用储能实际出功数值。
进一步地,若不能满足需要的有功功率总量,协调源网荷储和配电系统中其他资源,包括:
将配电系统源网荷储中各发电单元、微电网群和储能电站的可调节容量都调至最大值,剩余不足的有功功率由配电系统中备用储能电站补足。
优选地,将配电系统源网荷储中各发电单元、微电网群和储能电站的可调节容量都调至最大值不满足需要调控的有功功率总量ΔP,调用配电系统中备用储能电站补足剩余不足的有功功率的表达式为:
ΔP≤C+max bESU   (21)
PbESU=ΔP   (22)
其中,max bESU为备用储能最大出功数值,PbESU为备用储能实际出功数值。
进一步地,在调用配电系统中备用储能电站后仍不满足需要调控的有功功率总量ΔP时,调配源网荷储的可调负荷,减少或增加用有功功率的消耗。
优选地,调配源网荷储的可调负荷包括:比较配电网频率调节需要的总有功功率ΔP与配电系统源网储加上备用储能加上可调负荷容量的大小。
优选地,将配电系统源网荷储中各发电单元、微电网群和储能电站的可调节容量都调至最大值、调用配电系统中备用储能电站不满足需要调控的有功功率总量ΔP,可调负荷调至最大值满足需要调控的有功功率总量ΔP的表达式为:
ΔP≤C+max bESU+max aload   (23)
修正有功功率、微电网重新分配、调用储能电站和备用储能电站后仍不满足需要调控的有功功率总量ΔP,调配源网荷储的可调负荷的表达式为:
Figure PCTCN2021109632-appb-000012
Figure PCTCN2021109632-appb-000013
其中,max aload为可调负荷最大调节值,aload为可调负荷实际调节数值。
进一步地,在调用配电系统中备用储能电站、调配可调负荷后仍不满足需要调控的有功功率总量ΔP时,调用相邻外部系统,借调其他配电网的有功功率来补足剩余不足的有功功率的缺额。
优选地,调用相邻外部系统包括:比较配电网频率调节需要的总有功功率ΔP与配电系统源网荷储加上备用储能加上可调负荷容量加上外部系统的大小;设定外部系统的借调值。
优选地,将配电系统源网荷储调至最大可调容量、备用储能电站和可调负荷都调至最大值仍不满足需要调控的有功功率总量ΔP,调用相邻外部系统的表达式为:
ΔP≤C+max bESU+max aload+max waibu   (26)
waibu=ΔP-C-max bESU-max aload   (27)
修正有功功率、微电网重新分配、调用储能电站、备用储能电站以及调节可调负荷后仍不满足需要调控的有功功率总量ΔP,调用相邻外部系统的表达式为:
Figure PCTCN2021109632-appb-000014
Figure PCTCN2021109632-appb-000015
其中,max waibu为外部相邻系统最大调度值,waibu为外部相邻系统实际调度数值。
进一步地,还包括在调用备用储能电站、调配可调负荷、调用相邻外部系统进行有功功率补偿时,依据经济性原则分配配电系统各单元的有功功率调节量。
进一步地,所述经济最优原则包括:备用储能电站参考全年历史发电数据和故障率,依据高发电量低故障率进行排序使用;可调负荷参考负荷重要性等级及调用补偿成本,依据低重要性低补偿成本进行排序使用,相邻外部系统参考实时电价及调度损耗,依据高能源利用率低调度成本进行排序使用。
优选地,发电单元发生功率越限为分配的功率调节量高于或低于发电单元调节容量的边界。
与现有技术相比,本发明实施例所提供的一种源网荷储网络化协调频率控制方法所达到的有益效果包括:
本发明获取配电系统在电网二次调频过程中需要调控的有功功率总量ΔP;根据获取到的有功功率总量,配电系统的源网荷储进行调频,本发明能够合理调节发电源、微电网、负荷和储能的出功,补偿功率差额,维持每个发电源的出功和输出频率都在允许范围内,能够应对长时间的负载扰动;本发明成分发挥了配电系统调控的优势,能从外部系统供电,能够承受较大的负载扰动;
本发明兼顾了新能源调频的快速性与持续性,成分利用了新能源资源,解决了区域配电系统快速调频资源短缺、长时间小干扰下系统频率波动频繁、应对调频大量切负荷引起设备过载的问题,能够实现功率供需平衡,能够根据电网频率变化进行适时调节,协调控制电网稳定运行。
附图说明
图1是本发明实施例中提供的一种源网荷储网络化协调频率控制方法的流程图;
图2是本发明实施例提供的一种源网荷储网络化协调频率控制方法中配电系统的框架图;
图3是本发明实施例提供的一种源网荷储网络化协调频率控制方法的仿真模拟结果。
具体实施方式
下面结合附图对本发明作进一步描述。以下实施例仅用于更加清楚地说明 本发明的技术方案,而不能以此来限制本发明的保护范围。
如图1所示,一种源网荷储网络化协调频率控制方法,包括:
获取配电系统在电网二次调频过程中需要调控的有功功率总量ΔP;
根据获取到的有功功率总量,配电系统的源网荷储进行调频,分配功率调节量,判断调频后能否满足需要的有功功率总量;
若能满足需要的有功功率总量,判断发电单元是否发生功率越限:
若未发生功率越限,配电系统的有功功率平衡,完成电网频率调节;
若发生功率越限,修正源网荷储各发电单元的功率调节量并补足功率差额,使配电系统的有功功率平衡,完成电网频率调节;
若不能满足需要的有功功率总量,协调源网荷储和配电系统中其他资源,使配电系统的有功功率平衡,完成电网频率调节。
具体步骤如下:
步骤1:获取配电系统在电网二次调频过程中需要调控的有功功率总量ΔP。
具体的,电网发生频率扰动,配电系统接受到上级电力系统功率调节的指令。对电网频率扰动进行检测,当电网发生频率扰动超越额定误差值时,采集当前时刻电网频率,在主动响应模式下,配电系统根据一次调频后的频率偏差主动响应计算配网系统所需要补足的功率差额ΔP;在被动响应模式下,配电系统获取电力调度系统下发的功率调节量ΔP;ΔP即为要获取的有功功率总量。
步骤2:采集配电系统内部发电单元的数据信息。
具体的,获取配电系统内部风机电站、光伏电站当前预测发电量数据信息,获取配电系统内部储能电站的容量信息,获取配电系统内部微电网当前可调节功率范围。获取风机电站、光伏电站、微电网、储能电站、储能电站、可调负 荷及外部相邻供电系统个数。在本实施例中,如图2所示,配电系统包括:风机电站x个、光伏电站y个、微电网z个、储能电站m个、备用储能电站n个、可调负荷l个、相邻供电系统h个;其中风机电站的最大上调容量为max WT、光伏电站的最大上调容量为max PV、微电网的最大上调容量为max CDER、储能电站的最大上调容量为max ESU、备用储能电站的最大上调容量为max bESU可调负荷的最大上调容量为max aload、相邻外部系统的最大上调容量为max waibu。
步骤3:采集配电系统自身内部发电单元的调差系数数据。
具体的,获取配电系统内部风机电站、光伏电站、微电网及储能电站各自调差系数数值。风机电站的调差系数为kWT、光伏电站的调差系数为kPV、微电网的调差系数为kCDER、储能电站的调差系数kESU。
步骤4:计算配电系统源网荷储有功功率调节总量。
计算配电系统源网荷储有功功率可调节总量,通过下式计算:
Figure PCTCN2021109632-appb-000016
其中,max WT表示配电系统风机电站的最大可调容量,max PV表示配电系统光伏电站的最大可调容量,max CDER表示配电系统微电网的最大可调容量,max ESU表示配电系统储能电站的最大可调容量,C为配电系统源网荷储总的最大可调容量,表示配电系统源网荷储有功功率可调节总量C。
比较获取的有功功率总量ΔP与计算得到的配电系统源网荷储有功功率可调节总量C的大小;若ΔP≤C,则配电系统的源网荷储协调运行后能满足需要的有功功率总量;若ΔP>C,则配电系统的源网荷储协调运行后不能满足需要的有功功率总量。在本实施例中,设定配电系统风机电站和光伏电站可以满足功率 调节需求。
步骤5:根据已知配电系统内部各自发电源调差系数数据信息,将配电系统所需调节的总有功功率分配给配电系统各发电源。
具体的,通过ΔP以及风机电站、光伏电站、微电网、储能电站的调差系数kWT、kPV、kCDER、kESU,计算出风机电站、光伏电站、微电网、储能电站各自所需预算出功数值PWT、PPV、PCDER、PESU,根据以下计算公式得到:
Figure PCTCN2021109632-appb-000017
Y i=chengji÷kWT j,i=j=(1,2,…,x)   (3)
Y i=chengji÷kPV j,i=(x+1,x+2,…,x+y),j=(1,2,…,y)   (4)
Y i=chengji÷kCDER j,i=(x+y+1,x+y+2,…,x+y+z),j=(1,2,…,z)  (5)
Y i=chengji÷kESU j,i=(x+y+z+1,x+y+z+2,…,x+y+z+m),j=(1,2,…,m)  (6)
Figure PCTCN2021109632-appb-000018
PWT j=ΔP×(Y i÷Total),i=j=(1,2,…,x)  (8)
PPV j=ΔP×(Y i÷Total),i=(x+1,x+2,…,x+y),j=(1,2,…,y)  (9)
PCDER j=ΔP×(Y i÷Total),i=(x+y+1,x+y+2,…,x+y+z),j=(1,2,…,z)  (10)
PESU j=ΔP×(Y i÷Total),i=(x+y+z+1,x+y+z+2,…,x+y+z+m),j=(1,2,…,m)  (11)
其中,chengji为配电系统所有风机电站、光伏电站、微电网群、储能电站调差系数的乘积;Y为移除配电系统风机电站、光伏电站、微电网、储能电站中某个特定单元后调差系数的乘积;PWT j为风机电站第j个风机通过计算得出的预计分配出功数值,PPV j为光伏电站第j个光伏板通过计算得出的预计分配出功数值,PCDER j为微电网第j个微电网通过计算得出的预计分配出功数值,PESU j为储 能电站第j个储能电池通过计算得出的预计分配出功数值。
比较配电系统中风机电站、光伏电站、微电网、储能电站内各个单个单元的预计出功值PWT、PPV、PCDER、PESU与最大上调容量max WT、max PV、max CDER、max ESU的大小,判断系统是否会发生发电单元功率越限问题。如若风机电站、光伏电站、微电网、储能电站没有发电单元发生功率越限行为,则风机电站、光伏电站、微电网、储能电站各单元预计出功值PWT、PPV、PCDER、PESU即为结果输出值,备用储能、可调负载、备用系统的预计出功值PbESU、aload、Pwaibu设置为0,如若风机电站、光伏电站、微电网、储能电站有发电单元发生功率越限行为,则找到该单元,本例中假设光伏电站中第二个光伏板发生功率越限,将其功率调节量设定为最大值PPV 2=max PV 2
风机电站、光伏电站、微电网、储能电站内其余发电单元按照自身调差系数与光伏电站中第二个光伏板调差系数的反比值进行预设发电功率值的设定,计算如下:
Figure PCTCN2021109632-appb-000019
Figure PCTCN2021109632-appb-000020
Figure PCTCN2021109632-appb-000021
Figure PCTCN2021109632-appb-000022
其中,PWT i、PPV i、PCDER i、PESU i分别为风机电站、光伏电站、微电网、储能电站内各个单个单元的出功值。
步骤6:采集配电系统备用储能容量信息,在配电系统源网荷储发电单元发生功率越限的情况下利用备用储能补足差额。
具体的,配电系统风机电站、光伏电站、微电网、储能电站预设调节出功 值重新设定好后,判断配电系统风机电站、光伏电站、微电网、储能电站加上备用储能是否能满足配电系统需要调控的有功功率总量ΔP。
如果:
Figure PCTCN2021109632-appb-000023
则说明备用储能容量可以弥补因为配电系统发电单元越限,重新分配发电量而引起的电量缺额,此时,将备用储能电站的出功值设定为配电系统需要调控的有功功率总量ΔP与配电系统风机电站、光伏电站、微电网、储能电站预设调节出功值的差值,即:
Figure PCTCN2021109632-appb-000024
备用储能电站不需要全部参与出功,根据备用储能电站的容量、故障率调用成本等数据,综合通过经济性准则提前规划好出力顺序,依据出力成本最低原则依次调用备用储能电站。
如果:
Figure PCTCN2021109632-appb-000025
则说明备用储能电站的容量不足以弥补因为配电系统发电单元越限重新分配发电量而引起的电量缺额,此时,判断配电系统风机电站、光伏电站、微电网、储能电站加上备用储能和可调负荷能否满足配电系统需要调控的有功功率总量ΔP。
步骤7:采集配电系统可调负荷可调容量信息,在配电系统源网荷储发电单元发生功率越限,源网荷储预设可调容量加上备用储能电站的总容量不足的去情况下,利用可调负荷的调度弥补有功差额。
如果:
Figure PCTCN2021109632-appb-000026
则说明备用储能电站的容量和可调负荷协同互动可以弥补因为配电系统发电单元越限重新分配发电量而引起的电量缺额,此时,将备用储能出功值预设 为最大值PESU=max bESU,配电系统风机电站、光伏电站、微电网、储能电站设定为预设调节出功值,可调负载的调节值设定为配电系统需要调控的有功功率总量ΔP与配电系统风机电站、光伏电站、微电网、储能电站、备用储能电站预设调节出功值的差值,即:
Figure PCTCN2021109632-appb-000027
可调负载不需要全部参与调节,根据可调负载的种类、重要性、补偿成本等参考指标,提前规划好调度顺序,依据负载总调度花费成本最低原则依次调度负载弥补缺额。
如果:
Figure PCTCN2021109632-appb-000028
则说明备用储能电站的容量和可调负荷协同互动不足以弥补因为配电系统发电单元越限重新分配发电量而引起的电量缺额,此时,判断配电系统风机电站、光伏电站、微电网、储能电站加上备用储能、可调负荷以及从相邻外部系统调用电量能否满足配电系统需要调控的有功功率总量ΔP。
步骤8:采集配电系统相邻外部系统可调取容量信息,在配电系统源网荷储发电单元发生功率越限,源网荷储预设的可调容量加上备用储能电站、可调负荷总容量不足的情况下,调用相邻外部系统,借调其他配电网的有功功率来补足剩余不足的有功功率的缺额。
如果:
Figure PCTCN2021109632-appb-000029
Figure PCTCN2021109632-appb-000030
则说明配电系统风机电站、光伏电站、微电网、储能电站、备用储能电站、可调负荷和相邻外部供电系统的协同互动可以弥补因为配电系统发电单元越限重新分配发电量而引起的电量缺额,此时,将备用储能出功值预设为最大值 PESU=max bESU,将可调负荷的调节量设定为最大值aload=max aload,配电系统风机电站、光伏电站、微电网、储能电站设定为预设调节出功值,外部相邻系统的调度值设定为配电系统需要调控的有功功率总量ΔP与配电系统风机电站、光伏电站、微电网、储能电站、备用储能电站即可调负荷预设调节出功值的差值,即:
Figure PCTCN2021109632-appb-000031
相邻外部系统根据实时电价、调配距离等指标,按照综合调用电力花费成本最小的经济性指标提前规划好调配顺序,调用时按照经济性依次调用。
如果:
Figure PCTCN2021109632-appb-000032
Figure PCTCN2021109632-appb-000033
则说明配电系统风机电站、光伏电站、微电网、储能电站、、备用储能容量、可调负荷、相邻外部供电系统加上相邻外部系统的协同互动不足以弥补因为配电系统发电单元越限重新分配发电量而引起的电量缺额,此时输出配电网不能执行频率控制。
图3为实际仿真过程中,在配电网负载突增,母线频率降低,需要将频率上调且光伏电站中有单元出现频率越限的情况下,配电系统各发电单元及其他单元的输出结果。仿真结果表明本发明提供的方法,能够综合利用配电系统发电源、微电网、负荷、储能和相邻系统等资源,依据各单元调差系数合理分配功率缺额,保障配电系统在各单元不发生出功越限的情况下,能够应对长时间的频率扰动和大数值的有功功率缺额。整个控制过程中优先使新能源参与,最大化利用新能源资源,增加里了应对频率波动问题时的调控手段,相比单一使用柴油发电或者单一切负荷,调频成本更低,源网荷储等单元利用率提高。
本领域内的技术人员应明白,本申请的实施例可提供为方法、系统、或计算机程序产品。因此,本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明技术原理的前提下,还可以做出若干改进和变 形,这些改进和变形也应视为本发明的保护范围。

Claims (10)

  1. 一种源网荷储网络化协调频率控制方法,其特征在于,包括:
    获取配电系统在电网二次调频过程中需要调控的有功功率总量ΔP;
    根据获取到的有功功率总量,配电系统的源网荷储进行调频,分配功率调节量,判断调频后能否满足需要的有功功率总量;
    若能满足需要的有功功率总量,判断发电单元是否发生功率越限:
    若未发生功率越限,配电系统的有功功率平衡,完成电网频率调节;
    若发生功率越限,修正源网荷储各发电单元的功率调节量并补足功率差额,使配电系统的有功功率平衡,完成电网频率调节;
    若不能满足需要的有功功率总量,协调源网荷储和配电系统中其他资源,使配电系统的有功功率平衡,完成电网频率调节。
  2. 根据权利要求1所述源网荷储网络化协调频率控制方法,其特征在于,所述配电系统包括源网荷储、备用储能电站及相邻外部系统,所述源网荷储包括:风机电站、光伏电站、微电网群、可调负荷、储能电站。
  3. 根据权利要求1所述的源网荷储网络化协调频率控制方法,其特征在于,获取配电系统在电网二次调频过程中需要调控的有功功率总量ΔP,包括:
    对电网频率扰动进行检测,当电网发生频率扰动超越额定误差值时,采集当前时刻电网频率;
    在主动响应模式下,配电系统根据一次调频后的频率偏差主动响应计算配网系统所需要补足的功率差额ΔP;在被动响应模式下,配电系统获取电力调度系统下发的功率调节量ΔP;ΔP即为要获取的有功功率总量。
  4. 根据权利要求1所述的源网荷储网络化协调频率控制方法,其特征在于,判断配电系统的源网荷储调频后能否满足需要的有功功率总量,包括:
    计算配电系统源网荷储有功功率可调节总量C;
    比较获取的有功功率总量ΔP与计算得到的配电系统源网荷储有功功率可调节总量C的大小;
    若ΔP≤C,则配电系统的源网荷储协调运行后能满足需要的有功功率总量;
    若ΔP>C,则配电系统的源网荷储协调运行后不能满足需要的有功功率总量。
  5. 根据权利要求1所述的源网荷储网络化协调频率控制方法,其特征在于,若发生功率越限,修正源网荷储各发电单元的功率调节量并补足功率差额,包括:
    将发生功率越限行为的发电单元的出功量调至最大值,配电系统源网荷储中其他发电单元按照与越限发电单元调差系数的反比进行功率分配的再修正;
    检查修正后的其他发电单元是否发生功率越限,修正发生功率越限的发电单元,直到全部发电单元的功率越限问题都解决;
    当修正后所有发电单元的有功功率可调节总量仍不满足需要调控的有功功率总量ΔP,调节微电网群的功率分配;
    当微电网群的功率重新分配后,所有发电单元的有功功率可调节总量仍不满足需要调控的有功功率总量ΔP,调用储能电站补足剩余不足的有功功率;
    当调用储能电站仍不满足需要调控的有功功率总量ΔP,调用配电系统中备用储能电站补足剩余不足的有功功率,使配电系统的有功功率平衡,完成电网频率调节。
  6. 根据权利要求1所述的源网荷储网络化协调频率控制方法,其特征在于,若不能满足需要的有功功率总量,协调源网荷储和配电系统中其他资源,包括:
    将配电系统源网荷储中各发电单元、微电网群和储能电站的可调节容量都 调至最大值,剩余不足的有功功率由配电系统中备用储能电站补足。
  7. 根据权利要求5或6所述的源网荷储网络化协调频率控制方法,其特征在于,在调用配电系统中备用储能电站后仍不满足需要调控的有功功率总量ΔP时,调配源网荷储的可调负荷,减少或增加用有功功率的消耗。
  8. 根据权利要求7所述的源网荷储网络化协调频率控制方法,其特征在于,在调用配电系统中备用储能电站、调配可调负荷后仍不满足需要调控的有功功率总量ΔP时,调用相邻外部系统,借调其他配电网的有功功率来补足剩余不足的有功功率的缺额。
  9. 根据权利要求8所述的源网荷储网络化协调频率控制方法,其特征在于,还包括在调用备用储能电站、调配可调负荷、调用相邻外部系统进行有功功率补偿时,依据经济性原则分配配电系统各单元的有功功率调节量。
  10. 根据权利要求9所述的源网荷储网络化协调频率控制方法,其特征在于,所述经济最优原则包括:备用储能电站参考全年历史发电数据和故障率,依据高发电量低故障率进行排序使用;可调负荷参考负荷重要性等级及调用补偿成本,依据低重要性低补偿成本进行排序使用,相邻外部系统参考实时电价及调度损耗,依据高能源利用率低调度成本进行排序使用。
PCT/CN2021/109632 2021-06-01 2021-07-30 一种源网荷储网络化协调频率控制方法 WO2022252382A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US17/997,537 US20240055859A1 (en) 2021-06-01 2021-07-30 Source-grid-load-storage networked collaborative frequency control method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202110607676.7 2021-06-01
CN202110607676.7A CN113364055B (zh) 2021-06-01 2021-06-01 一种源网荷储网络化协调频率控制方法

Publications (1)

Publication Number Publication Date
WO2022252382A1 true WO2022252382A1 (zh) 2022-12-08

Family

ID=77530687

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/109632 WO2022252382A1 (zh) 2021-06-01 2021-07-30 一种源网荷储网络化协调频率控制方法

Country Status (3)

Country Link
US (1) US20240055859A1 (zh)
CN (1) CN113364055B (zh)
WO (1) WO2022252382A1 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116488180A (zh) * 2023-05-22 2023-07-25 国网安徽省电力有限公司淮北供电公司 一种基于源网荷储协同的新能源智能调度方法及系统
CN117498399A (zh) * 2023-12-29 2024-02-02 国网浙江省电力有限公司 考虑弹性可调能源实体接入的多能协同配置方法及系统
CN117748545A (zh) * 2024-02-21 2024-03-22 北京用尚科技股份有限公司 一种电动汽车集群协同的电网一次调频方法及系统

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114050570B (zh) * 2021-11-17 2024-03-01 许继集团有限公司 一种源网荷储系统协同调控方法及装置
CN115441442A (zh) * 2022-09-27 2022-12-06 南京邮电大学 源荷扰动下基于出力速度的微电网多源协调主从控制方法及装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110153055A1 (en) * 2009-12-17 2011-06-23 Taiwan Semiconductor Manufacturing Co., Ltd. Wide-range quick tunable transistor model
CN111130148A (zh) * 2020-02-19 2020-05-08 中国电力科学研究院有限公司 光伏发电与储能协调参与电网一次调频的控制方法和装置
CN112234635A (zh) * 2020-10-29 2021-01-15 合肥阳光新能源科技有限公司 一种新能源储能系统及其功率调节方法和功率分配方法
CN112564135A (zh) * 2020-12-22 2021-03-26 浙江大学 一种新能源与储能电站群频率/电压协调控制方法及装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110153055A1 (en) * 2009-12-17 2011-06-23 Taiwan Semiconductor Manufacturing Co., Ltd. Wide-range quick tunable transistor model
CN111130148A (zh) * 2020-02-19 2020-05-08 中国电力科学研究院有限公司 光伏发电与储能协调参与电网一次调频的控制方法和装置
CN112234635A (zh) * 2020-10-29 2021-01-15 合肥阳光新能源科技有限公司 一种新能源储能系统及其功率调节方法和功率分配方法
CN112564135A (zh) * 2020-12-22 2021-03-26 浙江大学 一种新能源与储能电站群频率/电压协调控制方法及装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116488180A (zh) * 2023-05-22 2023-07-25 国网安徽省电力有限公司淮北供电公司 一种基于源网荷储协同的新能源智能调度方法及系统
CN116488180B (zh) * 2023-05-22 2023-10-20 国网安徽省电力有限公司淮北供电公司 一种基于源网荷储协同的新能源智能调度方法及系统
CN117498399A (zh) * 2023-12-29 2024-02-02 国网浙江省电力有限公司 考虑弹性可调能源实体接入的多能协同配置方法及系统
CN117498399B (zh) * 2023-12-29 2024-03-08 国网浙江省电力有限公司 考虑弹性可调能源实体接入的多能协同配置方法及系统
CN117748545A (zh) * 2024-02-21 2024-03-22 北京用尚科技股份有限公司 一种电动汽车集群协同的电网一次调频方法及系统
CN117748545B (zh) * 2024-02-21 2024-04-16 北京用尚科技股份有限公司 一种电动汽车集群协同的电网一次调频方法及系统

Also Published As

Publication number Publication date
CN113364055A (zh) 2021-09-07
US20240055859A1 (en) 2024-02-15
CN113364055B (zh) 2021-12-17

Similar Documents

Publication Publication Date Title
WO2022252382A1 (zh) 一种源网荷储网络化协调频率控制方法
CN108092324B (zh) 一种风电参与调峰调频的agc控制系统和控制方法
CN103248056B (zh) 一种风电场集中并网地区的无功电压紧急控制方法
CN110581571A (zh) 一种主动配电网动态优化调度方法
CN109768581A (zh) 用于储能电站的电网调压与动态无功支撑控制方法
CN112838603B (zh) 一种风光储抽多源能源agc协调互补控制方法和装置
CN106549380A (zh) 多模态微电网能量协调优化控制方法
CN110783959B (zh) 一种新能源发电系统的稳定状态控制系统
CN115224746A (zh) 一种海上风电的多场景集群协调控制方法、装置及系统
CN114825388A (zh) 一种基于源网荷储协同的新能源综合消纳调度方法
CN116470528A (zh) 一种区域电网光储场站多时间尺度辅助调频方法
WO2022227319A1 (zh) 一种源储荷调切联动的紧急控制方法及系统
CN110808616A (zh) 一种基于功率缺额分配的微电网频率控制方法
CN117239740B (zh) 一种虚拟电厂系统的优化配置与灵活性提升方法及系统
CN113541177A (zh) 电网侧电化学储能单元及电站agc控制方法
CN111313466A (zh) 一种基于风力优先调节的送端电网agc优化调控方法及系统
Wang et al. Multi-objective optimal dispatch of wind-integrated power system based on distributed energy storage
CN113937802A (zh) 一种基于李雅普诺夫优化的微电网实时调度方法及装置
Niu et al. Research on AGC and AVC control technology of photovoltaic power station
CN117081177B (zh) 一种孤岛模式下水电主调机组微电网运行功率控制方法
CN117526299B (zh) 一种微电网有功无功功率协调控制系统及方法
CN110994655A (zh) 一种分布式电源的集中式协调控制方法
Li et al. Research of voltage control strategy for distribution network with PV connected
CN117096876B (zh) 基于分布式电源的分层多系统协同控制方法、装置和设备
CN112653141B (zh) 一种双向互动的配电侧电能响应系统及其控制方法

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 17997537

Country of ref document: US

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21943738

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21943738

Country of ref document: EP

Kind code of ref document: A1