CN109768554B - AC-DC hybrid distributed energy system test platform scene control switching method - Google Patents

AC-DC hybrid distributed energy system test platform scene control switching method Download PDF

Info

Publication number
CN109768554B
CN109768554B CN201910156043.1A CN201910156043A CN109768554B CN 109768554 B CN109768554 B CN 109768554B CN 201910156043 A CN201910156043 A CN 201910156043A CN 109768554 B CN109768554 B CN 109768554B
Authority
CN
China
Prior art keywords
pet
bess
power
scene
converter station
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201910156043.1A
Other languages
Chinese (zh)
Other versions
CN109768554A (en
Inventor
邓卫
裴玮
张学
孔力
黄强
李强
袁晓冬
杨晓梅
陈铭明
袁栋
车凯
张志昌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Institute of Electrical Engineering of CAS
State Grid Jiangsu Electric Power Co Ltd
Electric Power Research Institute of State Grid Jiangsu Electric Power Co Ltd
Original Assignee
Institute of Electrical Engineering of CAS
State Grid Jiangsu Electric Power Co Ltd
Electric Power Research Institute of State Grid Jiangsu Electric Power Co Ltd
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 Institute of Electrical Engineering of CAS, State Grid Jiangsu Electric Power Co Ltd, Electric Power Research Institute of State Grid Jiangsu Electric Power Co Ltd filed Critical Institute of Electrical Engineering of CAS
Priority to CN201910156043.1A priority Critical patent/CN109768554B/en
Publication of CN109768554A publication Critical patent/CN109768554A/en
Application granted granted Critical
Publication of CN109768554B publication Critical patent/CN109768554B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/10—Flexible AC transmission systems [FACTS]

Landscapes

  • Supply And Distribution Of Alternating Current (AREA)
  • Inverter Devices (AREA)

Abstract

The invention relates to a scene control switching method for a test platform of an alternating current-direct current hybrid distributed energy system, which comprises the following steps: (1) performing scene switching judgment according to the PET acquired by the control center and the static data and the operating power data of all converter stations, if a maintenance capability analysis condition is triggered, performing maintenance capability analysis in the step 2, and if not, returning to the scene switching judgment; (2) calculating a fine tuning instruction of the BESS according to the load, the BESS, the DG and the aggregation equivalent value of the running power data of all converter stations, if the maintaining capability is met, issuing the fine tuning instruction of the BESS and returning to the scene switching judgment, and otherwise, performing the scene switching; (3) and selecting a new main station, controlling the center to switch the control mode of the new main station into a constant direct-current voltage control mode, switching the PET into an active or reactive power control mode, calculating and issuing an active power instruction value of the PET, and finishing scene switching.

Description

AC-DC hybrid distributed energy system test platform scene control switching method
Technical Field
The invention relates to a scene control switching method for a test platform of an alternating current-direct current hybrid distributed energy system, and belongs to the technical field of renewable energy.
Background
Alternating current and direct current hybrid distributed renewable energy systems become an important form of future power distribution. The Center of the national virginia for Power Electronics Systems (CPES) proposed a building Power distribution system based on ac-dc link connections, and the north carolina state university proposed a 400V dc/120V ac hybrid (modern-electric energy-delivery and management system, FREEDM) system; universal and flexible power-management systems (UNIFLX) based on ac and dc power distribution are established in europe.
A Power Electronic Transformer (PET) has voltage class conversion and electrical isolation capabilities, can realize bidirectional controllable Power flow, plays an important role in controlling electric energy in an ac/dc hybrid system, has multiple control modes, is generally used for controlling the Power flow of a dc network, and has a structure shown in fig. 1. The structure of the PET-containing alternating current and direct current hybrid distributed energy system is shown in fig. 2, and comprises: an alternating current system, a direct current network, a PET and a converter station; each alternating current system is connected to a direct current network through a power electronic transformer or a converter station, and a plurality of alternating current systems are interconnected through the direct current network, wherein the direct current network comprises: a load and Distributed Generation (DG) unit such as photovoltaic and wind power and the like, an energy storage device such as a Battery Energy Storage System (BESS), a direct current line and a direct current bus, wherein the direct current line is connected with a direct current side of the PET and the converter station and the direct current bus, and the load, the DG unit and the BESS are connected with the direct current bus;
the equipment responsible for controlling the dc bus voltage in the ac/dc hybrid distributed energy system is called the master station. In normal operation, the PET is responsible for controlling the direct current bus voltage, and is used as a main station to bear the stable voltage of the whole direct current network in the system operation process.
In order to develop corresponding research and verification work in aspects of steady-state analysis, fault analysis, operation control, electric energy quality and the like, test schemes for an alternating-current and direct-current hybrid distributed energy system are increasingly abundant, and means such as a digital simulation system, a dynamic simulation experimental device, a digital-analog hybrid test system and the like are applied successively. The test schemes can provide test scenes of simulating different renewable energy source fluctuations and the like so as to test the dynamic performance and the electric energy quality of the alternating current and direct current system. Different network topological structures such as a ring network, a hand-pulling ring, radiation interconnection, a power supply and the like can also be provided so as to test the integration performance of the system. In these test scenarios, it is particularly important to run tests that control and optimize the scheduling functions.
As is well known, when an ac/dc system operates, optimal scheduling can cover various test scenarios, for example, a dc network provides active support for the ac system to optimize the overall active power flow; or the direct current network provides reactive support for the alternating current system to adjust the bus voltage of the alternating current system when the alternating current system is at low voltage, or the direct current network simultaneously supports the alternating current system in an active mode and a reactive mode, and the like.
Meanwhile, when the PET is used as a master station to operate and the voltage of an alternating current bus is reduced due to reactive power shortage of an alternating current system connected with the PET, the optimized scheduling is calculated, and then the reactive output value of the PET is given to support the voltage of the alternating current system, and meanwhile, the PET is used as the master station to still automatically balance the active power flow of the direct current network. Due to the fact that the optimized scheduling has a periodic characteristic, for example, the optimized scheduling is started once in 5 minutes, 15 minutes or 1 hour, in a scheduling period, due to the random fluctuation of renewable energy sources, the operating condition of the system may change, and therefore an original test scene is switched to a new test scene, such as full photovoltaic power generation, sudden wind power rise and the like, at the moment, the active power of interaction between the PET and the alternating current system rises along with the rising, and the apparent power of the interaction between the PET and the alternating current system exceeds the rated capacity. At the moment, a new scene needs to be started, the direct current network controllable unit and other available converter stations are used for coordination, and the PET control mode and the active power output are adjusted, so that the PET can continuously output the reactive power output given by the optimized dispatching, and meanwhile, the active power interacted with the alternating current system is controlled within an available reasonable range.
Disclosure of Invention
The invention solves the problems: the method for controlling and switching the scenes of the test platform of the alternating current and direct current hybrid distributed energy system overcomes the defects of the prior art, can quickly judge the change of the test scene, provides an intelligent switching time sequence of the test scene, and supports safe operation of the alternating current and direct current hybrid distributed energy system containing PET.
The technical scheme of the invention is as follows: a scene control switching method for a test platform of an AC/DC hybrid distributed energy system comprises the following steps:
step 1: the control center carries out scene switching judgment according to the acquired PET (power electronic transformer) and the static data and the operating power data of all converter stations, if the scene switching conditions are met, the maintenance capability analysis in the step (2) is triggered, and if the scene switching conditions are not met, the scene switching judgment is carried out again;
step 2: the control center calculates a fine adjustment instruction of the BESS according to the load of the AC-DC hybrid distributed energy system, the BESS (storage battery energy storage system), the DG (distributed generation) and the aggregation equivalent value of the operating power data of all converter stations, if the fine adjustment instruction and the BESS charge state meet the maintaining capability, the fine adjustment instruction of the BESS is issued and the step 1 is returned to carry out scene switching judgment, and otherwise the step 3 is carried out;
and step 3: the control center calculates a margin function of each converter station, the converter station corresponding to the maximum value is taken as a new main station, the control mode of the control center for switching the new main station is a constant direct-current voltage control mode, the PET is switched into an active or reactive power control mode, and an active power instruction value of the issued PET is calculated, so that the PET outputs active power, and scene switching is completed.
In step 1, the scene switching is determined as follows:
(1) the control center regularly obtains static data and operating power data of PET and the nth converter station, subscript N represents any value of the number of the converter stations, the value range is 1-N, and N is the total number of the converter stations; the static data comprises the nominal capacity S of the PETpet,ratedRated capacity S of each converter station1,rated,S2,rated...Sn,rated...SN,ratedRated power P of the stored energybess,rated(ii) a The operating power data comprise the reactive power Q of the respective PETpetActive power P of the respective converter station1,P2...Pn...PNReactive power Q of the individual converter stations1,Q2...Qn...QN(ii) a And the load power P in the DC networkloadDG power PDGBESS power PbessThe system comprises a load and a BESS, wherein each converter station takes a flow direction alternating current system as a power positive direction, PET takes a flow out alternating current system as a power positive direction, the load and the BESS take a flow out direct current bus as a power positive direction, and DG takes a flow direction direct current bus as a power positive direction;
(2) the control center calculates the load, the BESS, the DG and the operation power data of all the converter stations, if the switching condition is met:
Figure BDA0001982937360000031
and triggering the maintenance capability analysis, and otherwise, returning to the scene switching judgment.
In step 2, the maintenance capacity analysis is implemented as follows:
(1) setting aggregate equivalent value of load, BESS, DG and operating power data of all converter stations, denoted PTRThe trim instruction of BESS is represented as
Figure BDA0001982937360000032
PTR＝Pload+Pbess-PDG+P1+P2+Pn+...+PN
(2) If P isTR≥0，
Figure BDA0001982937360000033
Wherein 1- α represent the system stability margin coefficient set in consideration of the negative impedance characteristic of the DC network, and α is a margin out-of-limit threshold;
otherwise
Figure BDA0001982937360000034
(3) Finding a trim instruction in BESS
Figure BDA0001982937360000035
Then, judge if
Figure BDA0001982937360000036
Or
Figure BDA0001982937360000037
And SOC>SOCmax(ii) a Or
Figure BDA0001982937360000038
And SOC<SOCminSwitching to scene switching; otherwise, the control center issues
Figure BDA0001982937360000039
Entering BESS, and returning to scene switching judgment; wherein the SOCmaxRepresents the upper state of charge of the BESS, wherein SOCminRepresents the lower state of charge of the BESS.
In step 3, the scene switching process is as follows:
(1) selecting a new master station, calculating a margin function P for each converter stationn,avaible，Pn,avaibleA margin function representing the nth converter station:
Figure BDA0001982937360000041
wherein, a, b, cnC when the nth converter station adopts the AC side voltage control mode for fitting coefficientsn0; in other control modes cn＝1；
(2) Is calculated to obtain P1,avaible，P2,avaible，...，Pn,avaible，...，PN,avaibleTaking the converter station corresponding to the maximum value as a new main station, and assuming the converter station as the mth converter station;
(3) the control center switches the control mode of the mth converter station into a constant direct current voltage control mode, and the PET into an active power or reactive power control mode, wherein Q of the control center ispetKeeping the same:
(4) the active power instruction value of PET is changed to set PmUpdate P when equal to 0TRIf P isTRIf the value is more than or equal to 0, then:
Figure BDA0001982937360000042
if P isTR<0, then:
Figure BDA0001982937360000043
wherein the content of the first and second substances,
Figure BDA0001982937360000044
representing the active power command value, P, of the PETmRepresenting the active power, S, of the m-th converter stationm,ratedRepresenting the rated capacity of the mth converter station;
(5) the control center issues an active power instruction value to the PET
Figure BDA0001982937360000045
Scheduling PET in accordance with
Figure BDA0001982937360000046
Outputting active power to complete scene switchingThe process.
Compared with the prior art, the invention has the advantages that: the invention realizes intelligent switching of different scenes of a PET-containing alternating current and direct current hybrid distributed energy system in a scheduling period by a test platform scene control switching method, wherein: whether the maintenance capability analysis is started or not can be rapidly triggered through practical scene switching criteria; maintaining capacity analysis is carried out to quickly output power adjustment on the energy storage system, and if the system scene still cannot be guaranteed, scene switching is triggered; when the scene is switched, a new main station is quickly positioned, and the control mode and the output power of the PET are correspondingly switched, so that the voltage constancy of a direct current network and the reactive output of the PET to an alternating current system are maintained. The invention can quickly judge the change of the test scene, provides an intelligent switching time sequence of the test scene and supports the safe operation of the PET-containing alternating current and direct current hybrid distributed energy system.
Drawings
FIG. 1 is a schematic diagram of a PET structure;
FIG. 2 is a typical structure diagram of an AC/DC hybrid distributed energy system with an electronic power transformer;
fig. 3 is a flow chart of the implementation of the method of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
As shown in fig. 3, the method of the present invention includes the following steps:
1. and (3) scene switching judgment:
step 1, the control center regularly obtains static data and running power data of the PET and the nth converter station (subscript N represents any value of the number of the converter stations, the value range is 1-N, N is the total number of the converter stations), and the static data comprises the rated capacity S of the PETpet,ratedRated capacity S of each converter station1,rated,S2,rated...Sn,rated...SN,ratedRated power P of the stored energybess,rated(ii) a The operating power data comprise the reactive power Q of the respective PETpetActive power P of the respective converter station1,P2...Pn...PNReactive power Q of the individual converter stations1,Q2...Qn...QN(ii) a And the load power P in the DC networkloadDG power PDGBESS power PbessAnd a state of charge SOC. Each converter station takes the flow direction to an alternating current system as a positive power direction, the PET takes the flow direction to the alternating current system as a positive power direction, the load and the BESS take the flow direction to a direct current bus as a positive power direction, and the DG takes the flow direction to the direct current bus as a positive power direction, as shown in FIG. 1.
Step 2, the control center calculates the load, the BESS, the DG and the operation power data of all the converter stations, if the load, the BESS, the DG and the operation power data of all the converter stations are met
Figure BDA0001982937360000051
And triggering the maintenance capability analysis, and otherwise, returning to the scene switching judgment.
2. Analysis of the maintenance capacity:
step 1. setting PTRRecording the aggregate equivalent of the load, BESS, DG and the operating power data of all converter stations, noted as:
PTR＝Pload+Pbess-PDG+P1+P2+Pn+...+PN
setting BESS trimming instructions
Figure BDA0001982937360000052
Step 2, if PTR≥0，
Figure BDA0001982937360000053
1- α is a system stability margin coefficient set by considering the negative impedance characteristic of the direct current network, and α is a margin out-of-limit threshold;
otherwise
Figure BDA0001982937360000054
Step 3, finding the fine tuning instruction of BESS
Figure BDA0001982937360000055
Then, judge if
Figure BDA0001982937360000056
Or
Figure BDA0001982937360000057
And SOC>SOCmax(wherein SOC)maxUpper state of charge of BESS), or
Figure BDA0001982937360000058
And SOC<SOCmin(wherein SOC)minThe lower bound of the state of charge of the BESS), the scene switching is carried out. Otherwise, issuing a fine tuning instruction of BESS
Figure BDA0001982937360000061
And returning to the scene switching judgment.
3. Scene switching:
step 1, selecting a new main station, and calculating respective margin functions P for each converter stationn,avaible:
Figure BDA0001982937360000062
Wherein, a, b, cnWhen the nth converter station adopts an alternating-current side voltage control mode, c is a fitting coefficient (a, b, the value range is 0-1)nWhen other control modes are adopted c is 0n＝1。
Step 2, calculating the obtained P1,avaible，P2,avaible，...，Pn,avaible，...，PN,avaibleAnd taking the converter station corresponding to the maximum value as a new main station, and assuming the new main station as the mth converter station.
Step 3, the control center switches the control mode of the mth converter station into a constant direct current voltage control mode, and the PET is switched into an active/reactive power control mode, and Q of the active/reactive power control modepetKeeping the same:
step 4, changing the active power instruction value of the PET
Figure BDA0001982937360000063
Setting PmUpdate P when equal to 0TRSuch asFruit PTR≥0
Figure BDA0001982937360000064
If P isTR<0
Figure BDA0001982937360000065
Wherein the content of the first and second substances,
Figure BDA0001982937360000066
representing the active power command value, P, of the PETmRepresenting the active power, S, of the m-th converter stationm,ratedRepresenting the rated capacity of the mth converter station;
step 5, controlling the center to issue an active power instruction value to the PET
Figure BDA0001982937360000067
Scheduling PET in accordance with
Figure BDA0001982937360000068
And outputting active power to complete the scene switching process.
The AC-DC hybrid distributed energy system provides a flexible access form of future distributed energy, has foresight and advancement, and is favorable for promoting the access and consumption of the distributed energy and optimizing complementation. The mutual support test scene of the direct current network and the alternating current system has important guiding significance for system operation. Due to the random fluctuation of renewable energy sources, the test scenes of the system are variable, how to quickly judge the change of the test scenes is judged, and the problem of providing an effective switching method of the test scenes is not solved effectively at present. Therefore, the alternating current-direct current hybrid distributed energy system test scene control switching method effectively solves the problems, fills the technical blank and has wide application prospect.
The above examples are provided only for the purpose of describing the present invention, and are not intended to limit the scope of the present invention. The scope of the invention is defined by the appended claims. Various equivalent substitutions and modifications can be made without departing from the spirit and principles of the invention, and are intended to be within the scope of the invention.

Claims (4)

1. A scene control switching method for a test platform of an AC/DC hybrid distributed energy system is characterized by comprising the following steps:
step 1: the control center carries out scene switching judgment according to the acquired PET (power electronic transformer) and the static data and the operating power data of all converter stations, if the scene switching conditions are met, the maintenance capability analysis in the step (2) is triggered, and if the scene switching conditions are not met, the scene switching judgment is carried out again;
step 2: the control center calculates a fine adjustment instruction of the BESS according to the load of the AC-DC hybrid distributed energy system, the BESS (storage battery energy storage system), the DG (distributed power generation system) and the aggregation equivalent value of the operating power data of all converter stations, if the fine adjustment instruction and the BESS charge state meet the maintaining capability, the fine adjustment instruction of the BESS is issued and the step 1 is returned to carry out scene switching judgment, and otherwise the step 3 is carried out;
and step 3: the control center calculates a margin function of each converter station, the converter station corresponding to the maximum value is taken as a new main station, the control mode of the control center for switching the new main station is a constant direct-current voltage control mode, the PET is switched into an active or reactive power control mode, and an active power instruction value of the issued PET is calculated, so that the PET outputs active power, and scene switching is completed.
2. The AC-DC hybrid distributed energy system test platform scene control switching method according to claim 1, wherein: in step 1, the scene switching is determined as follows:
(1) the control center regularly obtains static data and operating power data of PET and the nth converter station, subscript N represents any value of the number of the converter stations, the value range is 1-N, and N is the total number of the converter stations; the static data comprises the nominal capacity S of the PETpet,ratedRated capacity S of each converter station1,rated,S2,rated...Sn,rated...SN,ratedRated power P of the stored energybess,rated(ii) a The operating power data comprise the reactive power Q of the respective PETpetActive power P of the respective converter station1,P2...Pn...PNReactive power Q of the individual converter stations1,Q2...Qn...QN(ii) a And the load power P in the DC networkloadDG power PDGBESS power PbessThe system comprises a load and a BESS, wherein each converter station takes a flow direction alternating current system as a power positive direction, PET takes a flow out alternating current system as a power positive direction, the load and the BESS take a flow out direct current bus as a power positive direction, and DG takes a flow direction direct current bus as a power positive direction;
(2) the control center calculates the load, the BESS, the DG and the operation power data of all the converter stations, if the switching condition is met:
Figure FDA0002472581830000011
and triggering the maintenance capability analysis, and otherwise, returning to the scene switching judgment.
3. The AC-DC hybrid distributed energy system test platform scene control switching method according to claim 2, wherein: in step 2, the maintenance capacity analysis is implemented as follows:
(1) setting aggregate equivalent value of load, BESS, DG and operating power data of all converter stations, denoted PTRThe trim instruction of BESS is represented as
Figure FDA0002472581830000021
PTR＝Pload+Pbess-PDG+P1+P2+Pn+...+PN
(2) If P isTR≥0，
Figure FDA0002472581830000022
Wherein 1- α represent the system stability margin coefficient set in consideration of the negative impedance characteristic of the DC network, and α is a margin out-of-limit threshold;
otherwise
Figure FDA0002472581830000023
(3) Finding a trim instruction in BESS
Figure FDA0002472581830000024
Then, judge if
Figure FDA0002472581830000025
Or
Figure FDA0002472581830000026
And SOC>SOCmax(ii) a Or
Figure FDA0002472581830000027
And SOC<SOCminSwitching to scene switching; otherwise, the control center issues
Figure FDA0002472581830000028
Entering BESS, and returning to scene switching judgment; wherein the SOCmaxRepresents the upper state of charge of the BESS, wherein SOCminRepresents the lower state of charge of the BESS.
4. The AC-DC hybrid distributed energy system test platform scene control switching method according to claim 2, wherein: in step 3, the scene switching process is as follows:
(1) selecting a new master station, calculating a margin function P for each converter stationn,avaible，Pn,avaibleA margin function representing the nth converter station:
Figure FDA0002472581830000029
wherein, a, b, cnC when the nth converter station adopts the AC side voltage control mode for fitting coefficientsn0; adopt itHe controls mode cn＝1；
(2) Is calculated to obtain P1,avaible，P2,avaible，...，Pn,avaible，...，PN,avaibleTaking the converter station corresponding to the maximum value as a new main station, and assuming the converter station as the mth converter station;
(3) the control center switches the control mode of the mth converter station into a constant direct current voltage control mode, and the PET into an active power or reactive power control mode, wherein Q of the control center ispetKeeping the same:
(4) the active power instruction value of PET is changed to set PmUpdate P when equal to 0TRIf P isTRIf the value is more than or equal to 0, then:
Figure FDA00024725818300000210
if P isTR<0, then:
Figure FDA0002472581830000031
wherein the content of the first and second substances,
Figure FDA0002472581830000032
representing the active power command value, P, of the PETmRepresenting the active power, S, of the m-th converter stationm,ratedRepresenting the rated capacity of the mth converter station;
(5) the control center issues an active power instruction value to the PET
Figure FDA0002472581830000033
Scheduling PET in accordance with
Figure FDA0002472581830000034
And outputting active power to complete the scene switching process.
CN201910156043.1A 2019-03-01 2019-03-01 AC-DC hybrid distributed energy system test platform scene control switching method Active CN109768554B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910156043.1A CN109768554B (en) 2019-03-01 2019-03-01 AC-DC hybrid distributed energy system test platform scene control switching method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910156043.1A CN109768554B (en) 2019-03-01 2019-03-01 AC-DC hybrid distributed energy system test platform scene control switching method

Publications (2)

Publication Number Publication Date
CN109768554A CN109768554A (en) 2019-05-17
CN109768554B true CN109768554B (en) 2020-07-03

Family

ID=66457335

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910156043.1A Active CN109768554B (en) 2019-03-01 2019-03-01 AC-DC hybrid distributed energy system test platform scene control switching method

Country Status (1)

Country Link
CN (1) CN109768554B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112952848B (en) * 2020-01-03 2022-07-08 浙江大学台州研究院 Energy storage multi-scene application switching control method based on comprehensive identification index
CN111262282B (en) * 2020-03-17 2021-09-28 中国科学院电工研究所 Income-considered distributed energy and user alternating current and direct current system management and control method
CN111293698B (en) * 2020-03-17 2021-09-28 中国科学院电工研究所 Distributed energy and user alternating current-direct current system management and control method considering operation margin
CN111327077B (en) * 2020-03-17 2021-09-17 中国科学院电工研究所 Distributed energy and user alternating current-direct current system management and control method considering new energy consumption
CN111882155B (en) * 2020-06-23 2022-06-24 国网河北省电力有限公司电力科学研究院 Testing and evaluating method of distributed energy storage system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108847680A (en) * 2018-07-26 2018-11-20 国网辽宁省电力有限公司经济技术研究院 A kind of alternating current-direct current mixing power distribution network hierarchical control method based on flexible looped network device
CN108988316A (en) * 2018-06-15 2018-12-11 四川大学 A kind of alternating current-direct current mixing distribution system grid structure Optimal Configuration Method
CN108988402A (en) * 2018-07-26 2018-12-11 国网辽宁省电力有限公司经济技术研究院 Alternating current-direct current power distribution network optimal control method based on Optimized Operation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108988316A (en) * 2018-06-15 2018-12-11 四川大学 A kind of alternating current-direct current mixing distribution system grid structure Optimal Configuration Method
CN108847680A (en) * 2018-07-26 2018-11-20 国网辽宁省电力有限公司经济技术研究院 A kind of alternating current-direct current mixing power distribution network hierarchical control method based on flexible looped network device
CN108988402A (en) * 2018-07-26 2018-12-11 国网辽宁省电力有限公司经济技术研究院 Alternating current-direct current power distribution network optimal control method based on Optimized Operation

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
基于电力电子变压器的交直流混合系统优化运行控制关键技术及研究框架;蒲天骄 等;《电网技术》;20180930;第 42 卷(第 9 期);第2752-2759页 *
基于置信度变换的交直流混联系统区间最优潮流;程虹 等;《电 力 科 学 与 技 术 学 报》;20181231;第33卷(第4期);第73-80页 *

Also Published As

Publication number Publication date
CN109768554A (en) 2019-05-17

Similar Documents

Publication Publication Date Title
CN109768554B (en) AC-DC hybrid distributed energy system test platform scene control switching method
EP3057192B1 (en) An energy internet and a hierarchical control system and a control method thereof
CN107005057B (en) Method and controller for coordinating control of a wind farm during disconnection from a utility grid
CN108964097B (en) Pumped storage and renewable energy power generation cooperative operation system and method
WO2022165914A1 (en) Cooperative control method for distributed voltage source converter, and alternating-current/direct-current hybrid microgrid
TWI774142B (en) Ac load power supply system and method
CN108667147B (en) Optimized dispatching method for flexible medium-voltage direct-current power distribution center with multiple micro-grids
US20130313908A1 (en) Communication power with multi-energy-source supply and control method
Bose et al. Tieline controls in microgrid applications
KR20170118285A (en) System and method ofoperating variable voltage for DC micro-grid
CN109659941B (en) AC/DC hybrid micro-grid autonomous control method and system
Morais et al. Interlink Converters in DC nanogrids and its effect in power sharing using distributed control
KR101626911B1 (en) Power control system and method for plural energy storage devices
CN113113912B (en) Multi-mode cooperative control method and system for four-port energy router
Nakamura et al. Green base station using robust solar system and high performance lithium ion battery for next generation wireless network (5G) and against mega disaster
Xu et al. Energy management and control strategy for DC micro-grid in data center
CN110970943A (en) Hybrid micro-grid system and control method thereof
CN108054777B (en) Wind power hydrogen production control strategy generation method and device, storage medium and computing equipment
CN116031920A (en) Hierarchical energy coordination control strategy for multiport power electronic equipment
Yao et al. Power sharing and voltage regulation in islanded dc microgrids with centralized double-layer hierarchical control
Ahmadi et al. Supervisory control of bipolar DC microgrids equipped with three-port multidirectional DC–DC converter for efficiency and system damping optimization
CN105977955B (en) A kind of direct-current grid DC voltage fluctuation is synchronous to eliminate system and method
CN113315162B (en) Station-level energy storage system and energy management system and method thereof
CN112531743B (en) Virtual power plant power regulation method based on direct-current power distribution technology
CN111934307B (en) Flat operation control method and system for direct current power distribution network

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant