CN116722522A - Coordinated control strategy applied to interconnection of multiple zones - Google Patents
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- 238000012360 testing method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 12
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- 238000004146 energy storage Methods 0.000 description 7
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Classifications
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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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/102—Parallel operation of dc sources being switching converters
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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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/04—Constant-current supply systems
-
- 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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
- H02J1/106—Parallel operation of dc sources for load balancing, symmetrisation, or sharing
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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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/14—Balancing the load in a network
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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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
A coordination control strategy applied to interconnection of a plurality of areas belongs to the technical field of power distribution. It adopts a control structure based on master-slave control; the control structure based on master-slave control at least comprises a master AC/DC and a plurality of slaves AC/DC; the host computer adopts a constant direct current power supply to control and establish direct current system voltage, and each slave computer obtains the amplitude of the output voltage of the host computer through a phase-locked loop to realize constant current control; each slave machine obtains the current output current value of the host machine through low-bandwidth communication and is used as a current control reference to realize power sharing and jointly supply power for loads in an independent direct current system. Aiming at a flexible interconnection system of a plurality of parallel transformer areas, a direct-current voltage control method under master-slave control is adopted, power among the transformers is distributed according to rated capacity in various operation modes, the requirement of transient stability of the interconnection system when the interconnection system is subjected to high-power load disturbance is met, better steady-state power sharing is realized, and the power quality of load power supply is improved.
Description
Technical Field
The invention belongs to the technical field of power distribution, and particularly relates to a coordination control strategy applied to interconnection of multiple power distribution areas.
Background
The interconnection and mutual supply of the low-voltage distribution transformer areas with the complementary load space-time characteristics are realized through the flexible direct current technology, so that the method is a brand new scheme for coping with challenges of the high-voltage alternating current distribution network power supply capability and the high-voltage alternating current distribution network power supply quality.
The coordination control method of the flexible interconnection system of the distribution area of the existing multi-converter grid connection mainly comprises average current average division control and sagging control.
The invention patent with the grant publication date of 2021.11.16 and the grant publication number of CN 110729742B discloses a power quality coordination control method for a low-voltage station area, which comprises the following steps: s1, firstly, performing analog learning and reactive compensation result pre-judgment on the voltage and current of a data processing platform area based on an AI technology; s2, carrying out output combination of reactive compensation equipment through a dynamic neural network algorithm; and S3, combining and coordinating the reactive compensation device and the reactive compensation device to perform control. The coordination control method is mainly used for performing coordination control on the same reactive power compensation device or different reactive power compensation devices of a low-voltage area, so that the problem of power quality of the area is prevented, the devices are compensated in an unordered mode at the same time, an effective treatment effect cannot be achieved, and the coordination control effect can be achieved through remote setting of capacity and functional modes of the same type of equipment of one area, such as a plurality of SVGs. However, the method relies on the data processing transformer area voltage and current based on the AI technology, and the prediction is carried out through simulation learning and reactive compensation results, so that the coordination control problem of the flexible interconnection system of the power distribution transformer area is not involved.
The application publication date is 2020.07.21, and the invention patent application with the application publication number of CN 111435788A discloses a method and a device for improving the capacity of a power distribution network for accepting a distributed power supply, wherein a flexible control system and a distributed energy storage system are additionally arranged for the power distribution network; determining an optimization result of the power distribution network by adopting a multi-objective optimization algorithm based on a first characterization parameter of the power distribution network admitting distributed power supply capability; and judging whether the capacity of the power distribution network for accommodating the distributed power supply meets the improvement requirement or not based on the optimization result, and if the capacity of the power distribution network for accommodating the distributed power supply does not meet the improvement requirement, repeating the steps until the capacity of the power distribution network for accommodating the distributed power supply meets the improvement requirement. The technical scheme avoids the limitation that the admission capacity of the distributed power supply is maximized only from the single angle of optimization, fundamentally solves the problem of improving the capacity of the power distribution network for admitting the distributed power supply, has higher improvement degree of the admission capacity or the allowable permeability of the distributed power supply, greatly improves the maximum admission capacity of the distributed power supply, and ensures that the large-scale distributed power supply can be safely and reliably accessed into the power distribution network. However, based on the capacity of the power distribution network for accommodating the distributed power supply, the optimization of the power distribution network is determined by adopting a multi-objective optimization algorithm, and the technical problem of how to realize stable control of direct-current voltage, quickly balance power of each area, ensure that power among converters is distributed according to rated capacity, and meet the transient stability of high-power load disturbance is solved.
How to realize stable control of direct current voltage, the power of each area is balanced rapidly, the power distribution among the converters is ensured according to rated capacity, the requirement of high-power load disturbance on transient stability is met, and the method becomes a common problem to be solved by various coordination control methods.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a coordinated control strategy applied to interconnection of a plurality of areas. In order to improve the running stability and reliability of a flexible interconnection system of a distribution area, effectively improve the direct-current voltage control capability of the system, realize the rapid power balance of each area, ensure the power distribution among converters according to rated capacity, and meet the requirement of high-power load disturbance on transient stability, the invention provides a master-slave control mode suitable for interconnection of a plurality of areas, realizes the issuing of a slave current command by means of low-bandwidth communication, realizes better steady-state power sharing, and improves the power quality of load power supply.
The technical scheme of the invention is as follows: the coordination control strategy applied to the interconnection of a plurality of areas is provided, and is characterized in that:
1) Aiming at a flexible interconnection system of a plurality of parallel transformer areas, a control structure based on master-slave control is adopted;
2) The control structure based on master-slave control at least comprises a master AC/DC and a plurality of slaves AC/DC;
3) The host computer adopts a constant direct current power supply to control and establish direct current system voltage, and each slave computer obtains the amplitude of the output voltage of the host computer through a phase-locked loop to realize constant current control;
4) Each slave machine obtains the current output current value of the host machine through low-bandwidth communication and is used as a current control reference to realize power sharing and jointly supply power for loads in an independent direct current system;
5) The reactive ring is used for reactive compensation of the alternating current test.
Specifically, the coordination control strategy applied to interconnection of multiple areas adopts a direct-current voltage control method under master-slave control aiming at a flexible interconnection system of multiple areas with parallel converters, ensures that power among converters is distributed according to rated capacity in various operation modes, meets the requirement of transient stability of the interconnection system when the interconnection system is subjected to high-power load disturbance, realizes better steady-state power balance, and improves the power quality of load power supply.
Specifically, in the master-slave control structure, the host computer refers to u according to the voltage d_ref And u q_ref Realizing constant voltage and constant frequency control.
Further, in the master-slave control structure, the master voltage outer loop controller transfer function G u_PI_m The method comprises the following steps:
transfer function G of host current inner loop controller i_PI_m The method comprises the following steps:
specifically, in the control structure of the master-slave control, the slave acquires the host sample through the low bandwidth communication mode to obtain the d-axis component i of the actual output current L1_d_m And q-axis component i L1_q_m Through the low-pass filtering link G LPF_i_ref Respectively obtaining d-axis current references i d_ref_s And q-axis current reference i q_ref_s And constant current control is realized through the current loop.
Further, in the master-slave control structure, a slave current inner loop controller transfer function G i_PI_s The method comprises the following steps:
slave current command low pass filtering link transfer function G LPF_i_ref The method comprises the following steps:
specifically, the low bandwidth communication at least includes CAN communication.
Furthermore, by adopting the master-slave cooperative control strategy, the electric energy quality of the direct current bus in the flexible interconnection system of the transformer area can be effectively ensured when the impact direct current load is accessed.
Furthermore, by adopting the master-slave cooperative control strategy, the power quality of the direct current bus can be effectively ensured and a good current sharing effect can be maintained when the direct current load is switched.
Furthermore, by adopting the master-slave cooperative control strategy, each slave realizes power sharing, ensures that power among converters is distributed according to rated capacity in various operation modes, and supplies power for loads in an independent direct current system together; the requirements of high-power load disturbance on transient stability are met, and meanwhile, the power quality of load power supply is improved; the reactive ring is used for reactive compensation of the alternating current side.
Compared with the prior art, the invention has the advantages that:
1. according to the technical scheme, a master-slave control mode suitable for interconnection of a plurality of areas is adopted, the slave-to-motor current instruction is issued by means of low-bandwidth communication, good steady-state power sharing is achieved, the requirement of high-power load disturbance on transient stability is met, and the power quality of load power supply is improved;
2. the technical scheme of the invention is beneficial to improving the running stability and reliability of the flexible interconnection system of the distribution transformer area, effectively improving the direct-current voltage control capability of the system, realizing the rapid power balance of each transformer area, ensuring the power distribution among the converters according to rated capacity, and meeting the requirement of high-power load disturbance on transient stability;
3. according to the technical scheme, the direct-current voltage control method under master-slave control is provided for the flexible interconnection system of the transformer areas with multiple parallel converters, and the effectiveness of a control strategy is verified for typical working conditions such as impact load access, transformer area average load power mutual power and dynamic reactive compensation, so that the power distribution among the converters in various operation modes according to rated capacity is ensured, the requirement of high-power load disturbance on transient stability is met, and meanwhile, the power quality of load power supply is improved.
Drawings
FIG. 1 is a schematic diagram of the present multi-zone interconnect system;
FIG. 2 is a schematic diagram of a control architecture based on master-slave control in accordance with the present invention;
FIG. 3 is a schematic diagram of a master-slave control architecture control block of the present invention;
FIG. 4a is a schematic diagram of the active power output curves for AC/DC # 1-3 during an impact load access test;
FIG. 4b is a graph showing the course of 750V DC voltage fluctuation in the impact load access test;
FIG. 5a is a schematic diagram of the active power output curves of AC/DC # 1-3 during DC load switching;
fig. 5b is a schematic diagram of a dc voltage fluctuation process during dc load switching;
FIG. 6a is a schematic diagram of the active power output curves of DCACs # 1-3 during AC side reactive compensation;
FIG. 6b is a schematic diagram of reactive power output curves of DCACs # 1-3 during AC side reactive compensation;
FIG. 6c is a schematic diagram of a DC voltage fluctuation process during reactive compensation on the AC side;
FIG. 6d is a schematic diagram of the DC load power and energy storage system power variation process during AC side reactive compensation;
fig. 7 is a schematic block diagram of a coordinated control strategy applied to interconnection of multiple zones according to the present invention.
Detailed Description
The invention is further described below with reference to the drawings and examples.
The technical scheme of the invention is the same as a coordination control strategy applied to interconnection of a plurality of areas, and the invention is characterized in that:
1) Aiming at a flexible interconnection system of a plurality of parallel transformer areas, a control structure based on master-slave control is adopted;
2) The control structure based on master-slave control at least comprises a master AC/DC and a plurality of slaves AC/DC;
3) The host computer adopts a constant direct current power supply to control and establish direct current system voltage, and each slave computer obtains the amplitude of the output voltage of the host computer through a phase-locked loop to realize constant current control;
4) Each slave machine obtains the current output current value of the host machine through low-bandwidth communication and is used as a current control reference to realize power sharing and jointly supply power for loads in an independent direct current system.
2. The coordination control strategy applied to the interconnection of a plurality of zones according to claim 1 is characterized in that the coordination control strategy applied to the interconnection of a plurality of zones adopts a direct current voltage control method under master-slave control aiming at a flexible interconnection system of a plurality of zones, ensures the power distribution among the converters under a plurality of operation modes according to rated capacity, meets the requirement of transient stability of the interconnection system when the interconnection system is subjected to high-power load disturbance, realizes better steady-state power sharing, and improves the power quality of load power supply.
Specifically, taking the multi-zone interconnection system shown in fig. 1 as an example, the technical scheme of the invention adopts a control structure based on master-slave control as shown in fig. 2, wherein the control structure based on master-slave control comprises a master machine AC/DC and a plurality of slave machines AC/DC.
The host computer adopts a constant direct current power supply to control and establish direct current system voltage, and the slave computer obtains the amplitude of the output voltage of the host computer through the phase-locked loop to realize constant current control.
Each slave machine obtains the current output current value of the host machine through low-bandwidth communication as a current control reference, so that power sharing is realized, and the slave machines supply power for loads in an independent direct current system. The reactive ring can be used to reactive compensate for ac measurement.
The control block diagram of the master-slave control structure is shown in fig. 3.
The host computer is based on the voltage reference u d_ref And u q_ref Realizing constant voltage and constant frequency control. Wherein G is u_PI_m The transfer function of the outer loop controller for the host voltage is as shown in formula (1):
G i_PI_m the transfer function for the host current inner loop controller is as shown in equation (2):
the slave acquires the d-axis component i of the actual output current by acquiring host samples through CAN communication L1_d_m And q-axis component i L1_q_m Through the low-pass filtering link G LPF_i_ref Respectively obtaining d-axis current references i d_ref_s And q-axis current reference i q_ref_s And constant current control is realized through the current loop.
Wherein G is i_PI_s For the slave current inner loop controller transfer function, as shown in equation (3):
G LPF_i_ref the low-pass filtering link transfer function is instructed by the slave current as shown in formula (3):
according to the technical scheme, the direct-current voltage control method under master-slave control is provided for the flexible interconnection system of the transformer areas with multiple parallel converters, the effectiveness of a control strategy is verified according to typical working conditions such as impact load access, transformer area average load power mutual compensation and dynamic reactive compensation, the power distribution among the converters in various operation modes according to rated capacity is ensured, the requirement of high-power load disturbance on transient stability is met, and meanwhile, the power quality of load power supply is improved.
Examples:
in order to verify the multi-zone interconnection coordination control strategy provided by the invention, three zone flexible interconnection system models are built in a PSCAD/EMTDC environment, three 10kV/380V distribution transformers are interconnected through three AC/DC at an AC outlet side, and the voltage between direct current poles is 750V. The direct current is connected to one path of energy storage, and the other path is a direct current load.
The three AC/DC are controlled by adopting the constant voltage control under the master-slave mode, and the effectiveness of the provided control strategy is verified under three working conditions of dynamic reactive compensation, equal load power mutual compensation of the transformer areas, impact load access and the like.
1) Impact load access:
and when t is less than 2s, the system is in a stable state, the direct current load is 100kW, the power of the energy storage system is 0kW for charging, t=2s, 500kW of instantaneous direct current impact load is put into the direct current bus, and after 100ms, the system is cut off, and the simulation results are shown in fig. 4a and 4 b.
Fig. 4a shows the active power output of AC/DC # 1-3, and fig. 4b shows the 750V DC voltage fluctuation process, and it can be seen from fig. 4a and fig. 4b that under the master-slave cooperative control strategy, the power quality of the DC bus can be effectively ensured when the impact DC load is connected.
2) The power of the station area is balanced with each other:
and when t <2s, the system is in a stable state, the direct current load is 100kW, the power of the energy storage system is 100kW, t=2s, the direct current load is stepped from 100kW to 400kW, and after 1s, the direct current load is restored to 100kW, and simulation results are shown in fig. 5a and 5 b.
Fig. 5a shows the active power output of AC/DC # 1-3, and fig. 5b shows the DC voltage ripple process. As can be seen from fig. 5a and fig. 5b, under the master-slave control strategy, three AC/DC circuits can effectively ensure the power quality of the DC bus when the DC load is switched, and can maintain a good current sharing effect.
3) Reactive compensation at alternating current side:
and when t <2s, the system is in a stable state, the direct current load is 200kW, the power of the energy storage system is 100kW, t=2s, the AC/DC # 1-3 equally outputs reactive compensation power 300kVar to the AC side, 1s stops outputting, and simulation results are shown in fig. 6a to 6 d.
Fig. 6a shows the active power outputs of DCACs #1 to 3, fig. 6b shows the reactive power outputs of DCACs #1 to 3, fig. 6c shows the dc voltage ripple process, and fig. 6d shows the dc load power and energy storage system power variation process.
As can be seen from fig. 6a to fig. 6d, under the master-slave control strategy, three AC/DC circuits can effectively ensure the power quality of the DC bus when the system needs reactive compensation operation.
The invention can be widely applied to the field of coordination control of interconnection of multiple power distribution areas.
Claims (10)
1. A coordination control strategy applied to interconnection of a plurality of areas is characterized in that:
1) Aiming at a flexible interconnection system of a plurality of parallel transformer areas, a control structure based on master-slave control is adopted;
2) The control structure based on master-slave control at least comprises a master AC/DC and a plurality of slaves AC/DC;
3) The host computer adopts a constant direct current power supply to control and establish direct current system voltage, and each slave computer obtains the amplitude of the output voltage of the host computer through a phase-locked loop to realize constant current control;
4) Each slave machine obtains the current output current value of the host machine through low-bandwidth communication and is used as a current control reference to realize power sharing and jointly supply power for loads in an independent direct current system;
5) The reactive ring is used for reactive compensation of the alternating current test.
2. The coordination control strategy applied to the interconnection of a plurality of zones according to claim 1 is characterized in that the coordination control strategy applied to the interconnection of a plurality of zones adopts a direct current voltage control method under master-slave control aiming at a flexible interconnection system of a plurality of zones, ensures the power distribution among the converters under a plurality of operation modes according to rated capacity, meets the requirement of transient stability of the interconnection system when the interconnection system is subjected to high-power load disturbance, realizes better steady-state power sharing, and improves the power quality of load power supply.
3. The coordinated control strategy applied to multi-zone interconnection according to claim 1, wherein in said master-slave control architecture, a host computer is controlled based on a voltage reference u d_ref And u q_ref Realizing constant voltage and constant frequency control.
4. A coordinated control strategy applied to multi-zone interconnections according to claim 3 wherein in said master-slave controlled control architecture, a master voltage outer loop controller transfer function G u_PI_m The method comprises the following steps:
transfer function G of host current inner loop controller i_PI_m The method comprises the following steps:
5. the coordinated control strategy applied to multi-zone interconnection according to claim 1, characterized in that in said master-slave control architecture, a slave obtains a master sample by a low bandwidth communication mode, obtaining a d-axis component i of an actual output current L1_d_m And q-axis component i L1_q_m Through the low-pass filtering link G LPF_i_ref Respectively obtaining d-axis current references i d_ref_s And q-axis current reference i q_ref_s And constant current control is realized through the current loop.
6. The coordinated control strategy applied to multi-zone interconnections according to claim 1, wherein in said master-slave controlled control architecture, a slave current inner loop controller transfer function G i_PI_s The method comprises the following steps:
slave current command low pass filtering link transfer function G LPF_i_ref The method comprises the following steps:
7. the coordinated control strategy for a multi-zone interconnect of claim 5 wherein said low bandwidth communications comprise at least CAN communications.
8. The coordinated control strategy applied to the interconnection of a plurality of areas according to claim 1 is characterized in that the master-slave coordinated control strategy is adopted, so that the electric energy quality of a direct current bus in a flexible interconnection system of the areas can be effectively ensured when an impact direct current load is accessed.
9. The coordinated control strategy applied to the interconnection of a plurality of areas according to claim 1 is characterized in that the master-slave coordinated control strategy is adopted, so that the electric energy quality of a direct current bus can be effectively ensured and a good current sharing effect can be maintained when a direct current load is switched.
10. The coordination control strategy applied to the interconnection of a plurality of areas according to claim 1, which is characterized in that the master-slave coordination control strategy is adopted, each slave realizes power sharing, ensures that the power among the converters is distributed according to rated capacity in a plurality of operation modes, and supplies power for loads in an independent direct current system together; the requirements of high-power load disturbance on transient stability are met, and meanwhile, the power quality of load power supply is improved; the reactive ring is used for reactive compensation of the alternating current side.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539777A (en) * | 2018-05-10 | 2018-09-14 | 国网江苏省电力有限公司徐州供电分公司 | A kind of Poewr control method for low pressure flexibility supplying power allocation system |
| CN112234597A (en) * | 2020-09-23 | 2021-01-15 | 国电南瑞科技股份有限公司 | Low-voltage direct-current coordination control method, system and device |
| CN114285056A (en) * | 2021-10-18 | 2022-04-05 | 国网浙江省电力有限公司丽水供电公司 | Multi-machine parallel improved master-slave control method for energy storage converter |
| US11316347B2 (en) * | 2018-11-14 | 2022-04-26 | Huawei Technologies Co., Ltd. | Photovoltaic power system and control method thereof |
| US20220166343A1 (en) * | 2019-08-12 | 2022-05-26 | Shanghai Jiao Tong University | Solid-state transformer having uninterrupted operation ability under ac/dc fault and control method thereof |
-
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- 2023-03-13 CN CN202310244773.3A patent/CN116722522A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539777A (en) * | 2018-05-10 | 2018-09-14 | 国网江苏省电力有限公司徐州供电分公司 | A kind of Poewr control method for low pressure flexibility supplying power allocation system |
| US11316347B2 (en) * | 2018-11-14 | 2022-04-26 | Huawei Technologies Co., Ltd. | Photovoltaic power system and control method thereof |
| US20220166343A1 (en) * | 2019-08-12 | 2022-05-26 | Shanghai Jiao Tong University | Solid-state transformer having uninterrupted operation ability under ac/dc fault and control method thereof |
| CN112234597A (en) * | 2020-09-23 | 2021-01-15 | 国电南瑞科技股份有限公司 | Low-voltage direct-current coordination control method, system and device |
| CN114285056A (en) * | 2021-10-18 | 2022-04-05 | 国网浙江省电力有限公司丽水供电公司 | Multi-machine parallel improved master-slave control method for energy storage converter |
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