CN110212557B - A plug-and-play operation control method for grid-connected distributed energy storage systems - Google Patents

A plug-and-play operation control method for grid-connected distributed energy storage systems Download PDF

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CN110212557B
CN110212557B CN201910339765.0A CN201910339765A CN110212557B CN 110212557 B CN110212557 B CN 110212557B CN 201910339765 A CN201910339765 A CN 201910339765A CN 110212557 B CN110212557 B CN 110212557B
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energy storage
storage system
distributed energy
self
grid
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CN110212557A (en
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李官军
胡安平
陶以彬
余豪杰
张宇
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China Electric Power Research Institute Co Ltd CEPRI
State Grid Shanghai Electric Power Co Ltd
State Grid Corp of China SGCC
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China Electric Power Research Institute Co Ltd CEPRI
State Grid Shanghai Electric Power Co Ltd
State Grid Corp of China SGCC
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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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators

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

Abstract

The invention provides a plug and play operation control method of a grid-connected distributed energy storage system, which comprises the steps of firstly obtaining a power grid voltage signal, a power grid frequency signal and fault information of the distributed energy storage system, and starting up the power machine to automatically start when the power grid voltage and the power grid frequency are normal and the distributed energy storage system has no fault; when the voltage and the frequency of the power grid are over the limit, the system enters an emergency support mode; and when the power grid voltage and the power grid frequency are not over-limited, further judging the SOC condition of the distributed energy storage system, so as to judge whether the self-running mode or the self-maintenance mode is entered. According to the invention, the operation mode of the energy storage system is automatically switched, the four-quadrant controllability of the power of the energy storage system is fully exerted, friendly interaction between the distributed energy storage system and a power grid is realized, and the economical efficiency and reliability of the distributed energy storage system are improved.

Description

Plug-and-play operation control method of grid-connected distributed energy storage system
Technical Field
The application relates to a plug and play operation control method of a grid-connected distributed energy storage system, and belongs to the technical field of energy storage.
Background
In the context of large-scale application of energy storage, grid connection of an energy storage system brings great challenges to the primary grid structure, automation control and management level of a power distribution network. The method comprises the steps of switching the states of off-grid operation, island operation, grid connection and grid connection of the energy storage system, reconstructing a grid distribution network frame during grid connection operation, switching different absorption modes, changing a network structure once during off-grid island operation and the like, so that the polymorphism of the operation of the power distribution network is caused, and the method is one of the difficulties of realizing flexible and effective control of a battery energy storage system or other controllable resources, realizing smooth switching and stable operation of different operation states of the power distribution network and achieving grid connection coordination control technology of the energy storage system. On the other hand, the PCS (Power Conversion System) and BMS (Battery Management System) systems of the battery energy storage system need to be accessed to a communication network, and the communication interaction process is complex. The communication protocol adopted at present is a traditional protocol facing the transmission process, only the accuracy and the safety of data transmission are guaranteed, the data lack of definite meaning and the self-description capability are not provided, on-site personnel are required to operate the communication and the function configuration of the intelligent electronic equipment, great manpower and material resource expenditure is required for transformation on the existing power distribution network automation system, the later maintenance cost is also great, how to simplify the process of accessing a large number of IED (Intelligent Electronic Device) into an active power distribution network, and the self-description and the interoperation of the equipment are another difficulty of the grid-connected coordination control technology of the energy storage system.
Aiming at the development trend of large-scale application of distributed energy storage, the invention aims to realize friendly and interactive control of energy storage access to a power grid through the plug-and-play technology of a distributed energy storage power station. The concept of plug and play was originally derived from networks and refers to the ability of computer systems to automatically configure expansion boards and other devices. Later, the plug and play concept is introduced into the field of distributed power supplies, and based on advanced power electronic technology, the control ideas and design ideas for plug and play and peer-to-peer control of the distributed power supplies are formed, so that the standardization of the universality of the grid-connected interface of the distributed power supplies is realized. Similarly, the concept of plug and play can be extended to energy storage power stations, but at present, related researches at home and abroad are less, which is a difficulty in realizing the distributed energy storage plug and play technology.
Disclosure of Invention
Aiming at the technical difficulties of the current distributed energy storage, the invention aims to overcome the problems, and provides a plug-and-play operation control method of a grid-connected distributed energy storage system, which solves the technical problems of difficult large-scale small-capacity distributed energy storage access, difficult management and difficult scheduling.
The invention is realized by the following technical scheme: the direct current end of the distributed energy storage system is connected with the direct current input end of the inversion unit and is connected to the power grid through the grid-connected switch.
The operation modes of the distributed energy storage system mainly comprise: a self-starting mode, a self-running mode, an emergency support mode, a self-recovery mode and a self-maintenance mode. As shown in fig. 2 and 3, the specific steps of the plug and play operation control method of the grid-connected distributed energy storage system are as follows:
the first step: determining whether the power grid voltage and the power grid frequency of the distributed energy storage system are normal, and if so, entering the next step of judgment; if the grid-connected requirement is not met, waiting;
secondly, determining whether the distributed energy storage system fails in a self-checking mode, and entering a failure shutdown process if two continuous self-checking failures occur; if the distributed energy storage system is not in continuous fault, entering automatic regression, and re-entering an automatic starting process;
thirdly, if the distributed energy storage system self-tests to have no faults, resetting a fault counter, and entering a startup process of the distributed energy storage system;
step four, completing the startup process of the distributed energy storage system, and enabling the system to enter a standby state;
fifthly, when the voltage and the frequency of the power grid are detected to be normal, the distributed energy storage system enters a self-running mode according to a set mode;
sixthly, when the abnormal voltage and frequency of the power grid are detected, the distributed energy storage system enters an emergency support mode, and the distributed energy storage system actively supports the power grid to stably operate according to the self power and the state of charge (SOC);
and seventhly, detecting the SOC of the distributed energy storage system, and when the SOC of the distributed energy storage system is in an excessively low interval for a long time, adopting a self-maintenance mode to maintain the distributed energy storage system, so that the service life and the reliability of the distributed energy storage system are improved.
The specific operation content of each mode is as follows:
self-starting mode: the distributed energy storage system detects no fault, the voltage and the frequency of the power grid meet the grid connection requirements, and the distributed energy storage system automatically starts a startup mode to a standby state;
self-operation mode: when the grid voltage and the grid frequency meet the grid connection requirement, the distributed energy storage system executes the running states of peak clipping and valley filling, controllable grid connection, stable fluctuation and the like according to the setting; meanwhile, the self-running mode can set one or more modes for self-adaptive conversion;
emergency support mode: when the voltage and the frequency of the power grid deviate from the normal operation range, the distributed energy storage system actively supports the power grid to safely operate according to the self-capacity;
self-recovery mode: when the power grid fails and the distributed energy storage system is stopped due to the failure, the distributed energy storage system has self-recovery capability after the power grid is recovered to be normal; when the distributed energy storage system fails, the distributed energy storage system has a reclosing function, and is automatically restarted again, and if the distributed energy storage system fails twice continuously, the distributed energy storage system is stopped for detection;
self-maintenance mode: when the system is in a long-time standby state, the self-discharge of the battery system leads to the over-low voltage, and the system needs to adopt an active charge-discharge maintenance mode.
Measuring the grid voltage U of an inverter unit abc And the power grid frequency f, and judging the working mode of the distributed energy storage system, wherein the working mode is a self-running mode, a self-maintenance mode and an emergency support mode, and the modules corresponding to the self-running mode are provided with two output ends, namely active power output and reactive power output; the module corresponding to the self-maintenance mode also has two output ends, namely active power output and reactive power output, and the module corresponding to the emergency support mode also has two output ends, namely active power output and reactive power output.
The active power output by the three modules is connected with a first PI regulator through a first change-over switch, and the first change-over switch can select to switch the system into a self-running mode, a self-maintenance mode or an emergency support mode according to a pre-judging result; the reactive power output by the three modules is connected with a second PI regulator through a second change-over switch, and the second change-over switch can select to switch the system into a self-running mode, a self-maintenance mode or an emergency support mode according to the pre-judging result.
The active power output by the module is taken as a given value P ref Will give the active power a given value P ref Proportional integral control is carried out on the difference between the control system and the active power p output by the control system to obtain the active power control quantity i of the inversion unit d-ref The method comprises the steps of carrying out a first treatment on the surface of the The reactive power output by the module is taken as a given value Q ref Let the reactive power set value Q ref Proportional integral control is carried out on the difference between the control system and the reactive power q output by the control system to obtain the reactive power control quantity i of the inversion unit q-ref 。
Will be connected to the grid current i abc Obtaining a transformed current i through 3/2 coordinate transformation d And i q Active power control amount i d-ref And the converted current i d Difference and reactive power control quantity i q-ref And the converted current i q The difference is fed into the current regulator together with the measurement of the DC voltage U of the inverter unit d After dq/alpha beta coordinate transformation, SVPWM signals of inversion units corresponding to the alternating current three phases are obtained respectively.
Furthermore, the phase change switching unit can realize that single-phase load is switched between three phases of alternating current at will, and various implementation modes exist.
The invention has the advantages and positive effects that:
the control method of the plug-and-play energy storage system is mainly aimed at the technical bottleneck of large-scale access of the grid-connected distributed energy storage system at present, namely the distributed energy storage system is mainly characterized by multiple access points, high distributed communication access cost and high management difficulty when being applied to the grid; according to the invention, the operation mode of the energy storage system is automatically switched, the four-quadrant controllability of the power of the energy storage system is fully exerted, friendly interaction between the distributed energy storage system and a power grid is realized, and the economical efficiency and reliability of the distributed energy storage system are improved.
Drawings
The following drawings are included to provide an understanding of the invention and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and their description to explain the principles of the invention.
In the accompanying drawings:
fig. 1 is a schematic diagram of an application of a grid-connected distributed energy storage system.
FIG. 2 is a flow chart of a distributed energy storage system self-starting and self-recovery strategy.
FIG. 3 is a flow chart of a distributed energy storage system operating strategy.
Fig. 4 is a schematic diagram of the operational control of the distributed energy storage system.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. It should be apparent that the described embodiments are only some embodiments of the present invention and not all embodiments of the present invention, and it should be understood that the present invention is not limited by the example embodiments described herein. Based on the embodiments of the invention described in the present application, all other embodiments that a person skilled in the art would have without inventive effort shall fall within the scope of the invention.
The invention is realized by the following technical scheme that as shown in fig. 1, a direct current end of a distributed energy storage system is connected with a direct current input end of an inversion unit and is connected to a power grid through a grid-connected switch.
Each phase of inversion bridge in the inversion unit comprises two IGBTs, the emitter of the first IGBT is connected with the collector of the second IGBT, and the grid of each IGBT is connected with the SVPWM signal output end of the corresponding phase inversion unit.
The distributed energy storage system of the present invention has a plurality of modes of operation, and mainly comprises: a self-starting mode, a self-running mode, an emergency support mode, a self-recovery mode and a self-maintenance mode. As shown in fig. 2 and 3, the specific steps of the grid-connected distributed energy storage system operation control method are as follows:
the first step: determining whether the power grid voltage and the power grid frequency of the distributed energy storage system are normal, and if so, entering the next step of judgment; if the grid-connected requirement is not met, waiting;
secondly, determining whether the distributed energy storage system fails in a self-checking mode, and entering a failure shutdown process if two continuous self-checking failures occur; if the distributed energy storage system is not in continuous fault, entering automatic regression, and re-entering an automatic starting process;
thirdly, if the distributed energy storage system self-tests to have no faults, resetting a fault counter, and entering a startup process of the distributed energy storage system;
step four, completing the startup process of the distributed energy storage system, and enabling the system to enter a standby state;
fifthly, when the voltage and the frequency of the power grid are detected to be normal, the distributed energy storage system enters a self-running mode according to a set mode;
sixthly, when the abnormal voltage and frequency of the power grid are detected, the distributed energy storage system enters an emergency support mode, and the distributed energy storage system actively supports the power grid to stably operate according to the self power and the state of charge (SOC);
and seventhly, detecting the SOC of the distributed energy storage system, and when the SOC of the distributed energy storage system is in an excessively low interval for a long time, adopting a self-maintenance mode to maintain the distributed energy storage system, so that the service life and the reliability of the distributed energy storage system are improved.
The specific operation content of each mode is as follows:
self-starting mode: the distributed energy storage system detects no fault, the voltage and the frequency of the power grid meet the grid connection requirements, and the distributed energy storage system automatically starts a startup mode to a standby state;
self-operation mode: when the grid voltage and the grid frequency meet the grid connection requirement, the distributed energy storage system executes the running states of peak clipping and valley filling, controllable grid connection, stable fluctuation and the like according to the setting; meanwhile, the self-running mode can set one or more modes for self-adaptive conversion;
emergency support mode: when the voltage and the frequency of the power grid deviate from the normal operation range, the distributed energy storage system actively supports the power grid to safely operate according to the self-capacity;
self-recovery mode: when the power grid fails and the distributed energy storage system is stopped due to the failure, the distributed energy storage system has self-recovery capability after the power grid is recovered to be normal; when the distributed energy storage system fails, the distributed energy storage system has a reclosing function, and is automatically restarted again, and if the distributed energy storage system fails twice continuously, the distributed energy storage system is stopped for detection;
self-maintenance mode: when the system is in a long-time standby state, the self-discharge of the battery system leads to the over-low voltage, and the system needs to adopt an active charge-discharge maintenance mode.
The specific control strategy for implementing the present invention is further described below. Firstly, acquiring a power grid voltage signal, a power grid frequency signal and fault information of a distributed energy storage system, controlling the on-off of a grid-connected switch according to whether the power grid voltage and the power grid frequency meet grid-connected conditions or not and whether the distributed energy storage system has faults or not, and when the power grid voltage and the power grid frequency are normal and the distributed energy storage system has no faults, switching on the grid-connected switch, starting up the power-on self-starting device and entering grid-connected operation; when the voltage and the frequency of the power grid are over the limit, the system enters an emergency support mode; and when the power grid voltage and the power grid frequency are not over-limited, further judging the SOC condition of the distributed energy storage system, so as to judge whether the self-running mode or the self-maintenance mode is entered. In the self-running mode, the peak clipping and valley filling operations such as charging control on the energy storage unit at low electricity prices at night and discharging control on the energy storage unit at high electricity prices at daytime can be executed.
Referring to fig. 4, the grid voltage U of the inverter unit is measured abc And the power grid frequency f, and judging the working mode of the distributed energy storage system, wherein the working mode is a self-running mode, a self-maintenance mode and an emergency support mode, and the modules corresponding to the self-running mode are provided with two output ends, namely active power output and reactive power output; the module corresponding to the self-maintenance mode also has two output ends, namely active power output and reactive power output, and the module corresponding to the emergency support mode also has two output ends, namely active power output and reactive power output.
The active power output by the three modules is connected with a first PI regulator through a first change-over switch, and the first change-over switch can select to switch the system into a self-running mode, a self-maintenance mode or an emergency support mode according to a pre-judging result; the reactive power output by the three modules is connected with a second PI regulator through a second change-over switch, and the second change-over switch can select to switch the system into a self-running mode, a self-maintenance mode or an emergency support mode according to the pre-judging result.
The active power output by the module is taken as a given value P ref Will give the active power a given value P ref Proportional integral control is carried out on the difference between the control system and the active power p output by the control system to obtain the active power control quantity i of the inversion unit d-ref The method comprises the steps of carrying out a first treatment on the surface of the The reactive power output by the module is taken as a given value Q ref Let the reactive power set value Q ref Proportional integral control is carried out on the difference between the control system and the reactive power q output by the control system to obtain the reactive power control quantity i of the inversion unit q-ref 。
Will be connected to the grid current i abc Obtaining a transformed current i through 3/2 coordinate transformation d And i q Active power control amount i d-ref And the converted current i d Difference and reactive power control quantity i q-ref And the converted current i q The difference is fed into the current regulator together with the measurement of the DC voltage U of the inverter unit d After dq/alpha beta coordinate transformation, SVPWM signals of inversion units corresponding to the alternating current three phases are obtained respectively.
The foregoing description is merely illustrative of specific embodiments of the present invention and the scope of the present invention is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the scope of the present invention. The protection scope of the invention is subject to the protection scope of the claims.

Claims (4)

1.一种并网型分布式储能系统的即插即用运行控制方法，分布式储能系统的直流端连接逆变单元的直流输入端，并通过并网开关连接到电网；其特征在于：1. A plug-and-play operation control method for a grid-connected distributed energy storage system. The DC end of the distributed energy storage system is connected to the DC input end of the inverter unit and connected to the grid through a grid-connected switch; characterized by: : 分布式储能系统的运行模式包括：自启动模式、自运行模式、应急支撑模式、自恢复模式、自维护模式，上述分布式储能系统运行控制方法的具体步骤如下：The operating modes of the distributed energy storage system include: self-starting mode, self-operating mode, emergency support mode, self-recovery mode, and self-maintenance mode. The specific steps of the above-mentioned distributed energy storage system operation control method are as follows: 第一步：确定分布式储能系统的电网电压、电网频率是否正常，若正常，则进入下一步判断；若不满足并网要求，则等待；Step 1: Determine whether the grid voltage and grid frequency of the distributed energy storage system are normal. If they are normal, proceed to the next step; if they do not meet the grid connection requirements, wait; 第二步，确定分布式储能系统自检是否出现故障，如果出现连续两次自检故障，则进入故障停机流程；若分布式储能系统不是连续故障，则进入自动回归，重新进入自启动流程；The second step is to determine whether there is a fault in the self-check of the distributed energy storage system. If there are two consecutive self-check failures, it will enter the fault shutdown process; if the distributed energy storage system does not have continuous failures, it will enter automatic regression and re-enter self-start. process; 第三步，若分布式储能系统自检无故障，则故障计数器清零，进入分布式储能系统开机流程；In the third step, if there is no fault in the distributed energy storage system self-test, the fault counter will be cleared and the distributed energy storage system startup process will be entered; 第四步，分布式储能系统开机流程完成，系统进入待机状态；In the fourth step, the start-up process of the distributed energy storage system is completed and the system enters standby state; 第五步，当检测到电网电压、电网频率正常时，分布式储能系统按照设定模式进入自运行模式；In the fifth step, when the grid voltage and grid frequency are detected to be normal, the distributed energy storage system enters the self-operation mode according to the set mode; 第六步，当检测到电网电压、电网频率异常时，分布式储能系统进入应急支撑模式，分布式储能系统依根据自身功率和SOC状态，主动支撑电网稳定运行；Step 6: When abnormalities in grid voltage and grid frequency are detected, the distributed energy storage system enters emergency support mode. The distributed energy storage system actively supports the stable operation of the grid based on its own power and SOC status; 第七步，检测分布式储能系统的SOC，当分布式储能系统的SOC长时间处于过低区间，则采用自维护模式，对分布式储能系统进行维护，提升分布式储能系统寿命和可靠性；The seventh step is to detect the SOC of the distributed energy storage system. When the SOC of the distributed energy storage system is in a too low range for a long time, the self-maintenance mode is used to maintain the distributed energy storage system and improve the life of the distributed energy storage system. and reliability; 各个模式具体操作内容为：The specific operation content of each mode is: 自启动模式：分布式储能系统检测无故障，电网电压、电网频率满足并网要求，分布式储能系统自动启动开机模式至待机状态；Self-starting mode: The distributed energy storage system detects no faults, the grid voltage and grid frequency meet the grid connection requirements, and the distributed energy storage system automatically starts the power-on mode to the standby state; 自运行模式：当电网电压、电网频率满足并网要求时，分布式储能系统按设定执行削峰填谷、并网可控、平抑波动等运行状态；同时自运行模式可以设定一种或多种模式自适应转换；Self-operating mode: When the grid voltage and grid frequency meet the grid connection requirements, the distributed energy storage system performs operating states such as peak shaving and valley filling, grid connection controllable, and fluctuation suppression according to settings; at the same time, the self-operating mode can set a Or adaptive conversion of multiple modes; 应急支撑模式：当电网电压、电网频率偏离正常运行范围时，分布式储能系统应根据自身能力主动支撑电网安全运行；Emergency support mode: When the grid voltage and grid frequency deviate from the normal operating range, the distributed energy storage system should actively support the safe operation of the grid based on its own capabilities; 自恢复模式：当电网故障，导致分布式储能系统故障停机时，待电网恢复正常后，分布式储能系统具备自恢复能力；当分布式储能系统自身故障时，其具备重合闸功能，再次自动恢复启动，如果连续两次出现故障，则停机待检；Self-recovery mode: When a power grid failure causes the distributed energy storage system to shut down, after the power grid returns to normal, the distributed energy storage system has self-recovery capabilities; when the distributed energy storage system itself fails, it has a reclosing function. It will automatically resume startup again. If a fault occurs twice in a row, it will shut down for inspection; 自维护模式：当系统处于长时间待机状态时，电池系统自放电导致电压过低，系统需要采取主动充放电的维护模式；Self-maintenance mode: When the system is in a long-term standby state, the battery system self-discharges, causing the voltage to be too low, and the system needs to adopt active charging and discharging maintenance mode; 所述自运行模式、所述自维护模式以及所述应急支撑模式分别输出有功功率和无功功率，所述有功功率通过第一切换开关与第一PI调节器连接，所述第一切换开关根据预判结果选择将系统切换为所述自运行模式、所述自维护模式或者所述应急支撑模式；三个模式输出的无功功率通过第二切换开关与第二PI调节器连接，所述第二切换开关根据预判结果选择将系统切换为所述自运行模式、所述自维护模式或者所述应急支撑模式。The self-operation mode, the self-maintenance mode and the emergency support mode output active power and reactive power respectively. The active power is connected to the first PI regulator through a first switch, and the first switch switches according to The prejudgment result selects to switch the system to the self-operation mode, the self-maintenance mode or the emergency support mode; the reactive power output by the three modes is connected to the second PI regulator through the second switch, and the third The second switch selects to switch the system to the self-operation mode, the self-maintenance mode or the emergency support mode according to the prediction result. 2.根据权利要求1所述的并网型分布式储能系统的即插即用运行控制方法，其特征在于：所述有功功率作为给定值Pref，将有功功率给定值Pref和控制系统输出的有功功率p之差进行比例积分控制，以得到逆变单元的有功功率控制量id-ref；所述无功功率作为给定值Qref，将无功功率给定值Qref和控制系统输出的无功功率q之差进行比例积分控制得到逆变单元的无功功率控制量iq-ref。2. The plug-and-play operation control method of the grid-connected distributed energy storage system according to claim 1, characterized in that: the active power is used as a given value Pref , and the active power given value Pref and The difference between the active power p output by the control system is proportional and integral controlled to obtain the active power control quantity id-ref of the inverter unit; the reactive power is used as a given value Q ref , and the reactive power given value Q ref The difference between the reactive power q output by the control system and the reactive power q output by the control system is proportional and integral controlled to obtain the reactive power control quantity i q-ref of the inverter unit. 3.根据权利要求2所述的并网型分布式储能系统的即插即用运行控制方法，其特征在于：将测量得到的并网电流iabc经过3/2坐标变换，得到变换后的电流id和电流iq，将所述有功功率控制量id-ref与变换后的所述电流id之差以及所述无功功率控制量iq-ref与变换后的所述电流iq之差一起送入电流调节器，同时测量逆变单元的直流电压Ud，经dq/αβ坐标变换后分别得到与交流三相分别对应的逆变单元的SVPWM信号。3. The plug-and-play operation control method of a grid-connected distributed energy storage system according to claim 2, characterized in that: the measured grid-connected current i abc is subjected to a 3/2 coordinate transformation to obtain the transformed Current id and current iq , the difference between the active power control amount id -ref and the converted current id and the reactive power control amount i q-ref and the converted current i The difference in q is sent to the current regulator together, and the DC voltage U d of the inverter unit is measured at the same time. After dq/αβ coordinate transformation, the SVPWM signals of the inverter unit corresponding to the three AC phases are obtained respectively. 4.根据权利要求1所述的并网型分布式储能系统的即插即用运行控制方法，其特征在于：所述逆变单元中的每相逆变桥均包括两个IGBT，第一IGBT的发射极连接第二IGBT的集电极，每个IGBT的栅极与对应相逆变单元的SVPWM信号输出端相连。4. The plug-and-play operation control method of a grid-connected distributed energy storage system according to claim 1, characterized in that: each phase inverter bridge in the inverter unit includes two IGBTs, the first The emitter of the IGBT is connected to the collector of the second IGBT, and the gate of each IGBT is connected to the SVPWM signal output terminal of the corresponding phase inverter unit.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104218612A (en) * 2014-09-26 2014-12-17 东南大学 Micro-grid flexible grid-connected control method based on integrated control on common connecting point position
CN105244907A (en) * 2015-09-23 2016-01-13 上海载物能源科技有限公司 Plug-and-play solar optical recording integration control system and method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104218612A (en) * 2014-09-26 2014-12-17 东南大学 Micro-grid flexible grid-connected control method based on integrated control on common connecting point position
CN105244907A (en) * 2015-09-23 2016-01-13 上海载物能源科技有限公司 Plug-and-play solar optical recording integration control system and method

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