CN218603186U - Shared energy storage distributed scheduling system for customized power service - Google Patents
Shared energy storage distributed scheduling system for customized power service Download PDFInfo
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- CN218603186U CN218603186U CN202222117356.6U CN202222117356U CN218603186U CN 218603186 U CN218603186 U CN 218603186U CN 202222117356 U CN202222117356 U CN 202222117356U CN 218603186 U CN218603186 U CN 218603186U
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Abstract
The utility model provides a customization electric power service-oriented shared energy storage distributed scheduling system, including customization electric power integrated control module, customization electric power integrated control module includes data acquisition unit, compensation arrangement, energy management system, sharing energy storage coordination controller, and compensation arrangement includes voltage sag compensation arrangement, dynamic harmonic suppression reactive power compensation arrangement, and data acquisition unit includes voltage collector, electric current collector; the voltage collector, the voltage sag compensation device, the energy management system and the shared energy storage coordination controller form a first scheduling channel; the current collector, the dynamic harmonic suppression reactive power compensation device, the energy management system and the shared energy storage coordination controller form a second dispatching channel; and the shared energy storage coordination controller is respectively connected with the power control switches of the distributed energy storage subsystems. According to the technical scheme, diversified customized power services are provided for the user side through different scheduling channels, and diversified requirements of the user on power quality are met.
Description
Technical Field
The utility model belongs to the power dispatching field especially relates to a sharing energy storage distributing type dispatch system towards customization power service.
Background
With the continuous progress of the energy and power industry technology, the energy internet will become an important development direction for the development of the future power grid. In the technology related to the energy internet, the joint operation of distributed energy storage and distributed renewable energy sources is an important development direction of the energy internet in the future. Unlike large-scale centralized energy storage installed investingly on the power supply side and the power grid, distributed energy storage is usually installed on the user side for storing excess electric energy generated by renewable energy sources of users or for reducing electricity charges by helping user load curve peak shifting. However, the cost of energy storage is still high, and it is difficult to have general economy, which limits the wide application of distributed energy storage. To solve this problem, shared energy storage based on a shared economy mode has been developed. The shared energy storage is a shared energy storage technology based on the existing built power grid, and a centralized energy storage facility or aggregated distributed energy storage resources are comprehensively utilized, so that a user can use the shared energy storage resources formed by the centralized or distributed energy storage facilities at any time and any place as required, the energy storage use cost of the user is reduced, and the investment recovery period of energy storage is shortened.
A plurality of conventional Distributed Energy Storage Subsystems (DESS) are usually included, wherein each DESS includes a Battery Management System (BMS), a Power Conversion System (PCS) and an energy storage unit, and in the prior art, the BMS is usually controlled by an Energy Management System (EMS), and then charging and discharging power of the distributed energy storage unit is realized through the PCS, so as to provide a shared energy storage service to a user side. The existing distributed energy storage system only provides a single active energy-saving service for eliminating day and night load peaks and valleys for an owner, and cannot provide more diversified customized power services for users with special management requirements on power quality such as voltage deviation and voltage sag.
SUMMERY OF THE UTILITY MODEL
In order to solve the single shortcoming and the not enough of energy storage system service that exists among the prior art, the utility model discloses customized electric power integrated control module has been add in the conventional distributed energy storage system of user side, realize the centralized control and the human-computer interaction of polymorphic type service, by current voltage sag compensation device, dynamic harmonic restraines reactive power compensation device, voltage deviation administers device and sharing energy storage coordination controller and makes up out different dispatch passageway, can be used for voltage sag to administer respectively, harmonic restraines and voltage deviation capacity compensation, satisfies the user to the diversified demand of electric power quality.
The utility model provides a sharing energy storage distributed scheduling system includes a plurality of distributed energy storage subsystems, corresponds user's side load and the integrated control module of customization power of being connected with distributed energy storage subsystems, the integrated control module of customization power includes data acquisition unit, compensation arrangement, energy management system and sharing energy storage coordination controller, compensation arrangement includes voltage sag compensation arrangement and dynamic harmonic suppression reactive power compensator, the data acquisition unit includes voltage collector and current collector;
the voltage collector, the voltage sag compensation device, the energy management system and the shared energy storage coordination controller are sequentially connected to form a first scheduling channel; the current collector, the dynamic harmonic suppression reactive power compensation device, the energy management system and the shared energy storage coordination controller are sequentially connected to form a second scheduling channel; and the shared energy storage coordination controller is respectively connected with the charge and discharge power control switches of each distributed energy storage subsystem.
Optionally, the input ends of the voltage collector and the current collector are both connected with a three-phase terminal of a user-side load;
the output end of the voltage collector is connected with the input end of the voltage sag compensation device through an A/D conversion unit;
and the output end of the current collector is connected with the input end of the dynamic harmonic suppression reactive power compensation device through an A/D conversion unit.
Optionally, the output end of the dynamic harmonic suppression reactive power compensation device is connected to the input end of the voltage sag compensation device.
Optionally, the compensation device further comprises a voltage deviation treatment device, the data acquisition unit further comprises a meteorological sensor installed on a user side load, and a voltage collector, a current collector and the meteorological sensor in the data acquisition unit are respectively and sequentially connected with the voltage deviation treatment device, the energy management system and the shared energy storage coordination controller to form a third dispatching channel.
Optionally, the customized power integrated control module further includes a display terminal, and the display terminal is connected to the energy management system and the shared energy storage coordination controller through an IO port, and is configured to visualize scheduling actions of the energy management system and the shared energy storage coordination controller.
The utility model provides a beneficial effect that technical scheme brought is:
(1) The customized power integrated control module is additionally arranged on the basis of a conventional user side energy storage system to realize centralized scheduling control of multiple types of services, and diversified customized power services are provided for the user side through different scheduling channels, so that active power and reactive power of the distributed shared energy storage subsystem are rapidly coordinated and scheduled, and diversified requirements of users on power quality are met.
(2) The data visualization module is utilized in the service process, the customized electric power service information of the user side and the state information of the shared energy storage subsystem are displayed on the computer terminal of the manager, the manager can regulate and control the system through the computer terminal, manual centralized monitoring of system operation and human intervention under abnormal conditions are achieved, and the operation safety of the system is guaranteed.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a shared energy storage distributed scheduling system for customized power services according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a conventional user-side energy storage system.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein.
It should be understood that, in various embodiments of the present invention, the sequence numbers of the processes do not mean the execution sequence, and the execution sequence of the processes should be determined by the functions and the internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
It should be understood that in the present application, "comprising" and "having" and any variations thereof, is intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that, in the present invention, "a plurality" means two or more. "and/or" is merely an association describing an associated object, meaning that three relationships may exist, for example, and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "comprises A, B and C" and "comprises A, B, C" means that all three of A, B, C comprise, "comprises A, B or C" means that one of three of A, B, C is comprised, "comprises A, B and/or C" means that any 1 or any 2 or 3 of the three of A, B, C is comprised.
It should be understood that in the present invention, "B corresponding to a", "a corresponds to B", or "B corresponds to a" means that B is associated with a, and B can be determined from a. Determining B from a does not mean determining B from a alone, but may be determined from a and/or other information. And the matching of A and B means that the similarity of A and B is greater than or equal to a preset threshold value.
As used herein, "if" can be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on context.
The technical solution of the present invention will be described in detail with specific examples. These several specific embodiments may be combined with each other below, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Example (b):
as shown in fig. 1, this embodiment provides a shared energy storage distributed scheduling system for a customized power service, where the shared energy storage distributed scheduling system includes a plurality of distributed energy storage subsystems, a user side load correspondingly connected to the distributed energy storage subsystems, and a customized power integrated control module, where the customized power integrated control module includes a data acquisition unit, a compensation device, an energy management system, and a shared energy storage coordination controller, the compensation device includes a voltage sag compensation device and a dynamic harmonic suppression reactive compensation device, and the data acquisition unit includes a voltage collector and a current collector;
the voltage collector, the voltage sag compensation device and the shared energy storage coordination controller are sequentially connected to form a first scheduling channel; the current collector, the dynamic harmonic suppression reactive power compensation device and the shared energy storage coordination controller are sequentially connected to form a second dispatching channel; and the shared energy storage coordination controller is respectively connected with the charge and discharge control switches of the shared energy storage nodes.
Fig. 2 provides a schematic diagram of a conventional energy storage system on a user side, which generally includes a plurality of conventional Distributed Energy Storage Subsystems (DESS), wherein each DESS includes a Battery Management System (BMS), a Power Conversion System (PCS), and an energy storage unit, and in the prior art, the BMS is generally controlled by an Energy Management System (EMS) to implement charging and discharging power of the distributed energy storage unit through the PCS, so as to provide a shared energy storage service to the user side.
As can be seen from fig. 1, in this embodiment, n distributed energy storage subsystems, which are DESS1 to DESSn, are taken as an example, each DESS includes a BMS, an energy storage unit, and a PCS, and the n distributed energy storage subsystems provide shared energy storage services for m users corresponding to loads 1 to m, respectively. In the embodiment, on the basis of a conventional user-side energy storage system formed by n distributed energy storage subsystems, a customized power integrated control module comprising a data acquisition unit, an A/D conversion unit, a compensation device, an EMS (energy management system) and a shared energy storage coordination controller is additionally arranged, different dispatching channels are combined, compensation control signals corresponding to different power quality governance are generated by the different dispatching channels, and the customized power integrated control module can be respectively used for voltage sag governance, harmonic suppression and voltage deviation capacity compensation, so that active power and reactive power of the distributed shared energy storage subsystems are rapidly coordinated and dispatched, and the diversified requirements of users on power quality are met.
Furthermore, the input ends of the voltage collector and the current collector are connected with a three-phase terminal of a user side load; the output end of the voltage collector is connected with the input end of the voltage sag compensation device through an A/D conversion unit;
and the output end of the current collector is connected with the input end of the dynamic harmonic suppression reactive power compensation device through an A/D conversion unit.
In this embodiment, the data acquisition unit is responsible for collecting distribution network information and user side information, wherein the grid information includes: the electric wire netting electrovalence information, the meteorological information, join in marriage distribution network node voltage information, the distributed generator active power of each node, reactive power information, join in marriage distribution network line resistance, reactance information of time sharing, the distribution network information includes: the system comprises planned load information of a user side, an energy-saving service request signal, a power quality management service request signal and real-time monitoring information of three-phase voltage and current at the tail end of the user side.
Furthermore, the A/D conversion unit is used for converting the analog signals acquired by the data acquisition unit and the shared energy storage coordination controller into data signals and transmitting the data signals to the compensation device.
In this embodiment, the compensation device is responsible for generating a charge-discharge power control signal for customizing the power diversification service, and can receive a series of data from the power grid side, the user side, and the shared energy storage end, and can respectively send the data to the internal voltage sag rapid compensation device, the voltage deviation governance device, and the dynamic harmonic suppression reactive compensation device, and an active/reactive power regulation signal instruction required for generating the voltage sag governance service, the harmonic governance service, and the voltage deviation governance service is sequentially obtained by the signal generation units built in the 3 devices, and is sent to the energy management system to execute the regulation signal instruction.
Further, the voltage sag compensation device is used for generating an active compensation control signal and a reactive compensation control signal for responding to the voltage sag, and sending the active compensation control signal and the reactive compensation control signal to the energy management system.
In this embodiment, the voltage sag fast compensation device is an electric power device such as an automatic electric control cabinet dedicated to voltage sag compensation, for example, an RT-VSC voltage sag compensation device. The voltage sag rapid compensation device has rapid analysis and rapid compensation functions, receives voltage data sampled in real time, performs phase-locked tracking on the sine waveform of the voltage at the user side, and judges the voltage sag condition of a target user. When voltage sag occurs in the user terminal, an active compensation control signal and a reactive compensation control signal for responding to the voltage sag are quickly generated through a built-in signal generation unit, and then the active compensation control signal and the reactive compensation control signal are executed through an EMS (energy management system), so that the effect of quickly compensating the voltage sag on the user side is achieved.
Furthermore, the output end of the dynamic harmonic suppression reactive power compensation device is connected with the input end of the voltage sag compensation device, and the dynamic harmonic suppression reactive power compensation device is used for generating a reactive power compensation control signal for suppressing harmonic and sending the reactive power compensation control signal to the energy management system.
In this embodiment, the dynamic harmonic suppression reactive power compensation device is an electric power device such as an automatic electric control cabinet dedicated to harmonic suppression reactive power compensation, for example, a CY-DM series intelligent harmonic suppression capacitance compensation device. The dynamic harmonic suppression reactive power compensation device separates the harmonic component and the fundamental wave reactive component in the line current through the received real-time sampled current information and the active compensation control signal and the reactive compensation control signal output by the voltage sag rapid compensation device, and rapidly generates a reactive compensation control signal for suppressing the harmonic through a built-in signal generation unit.
Furthermore, the compensation device also comprises a voltage deviation treatment device, the data acquisition unit also comprises a meteorological sensor installed on a user side load, and a voltage collector, a current collector and the meteorological sensor in the data acquisition unit are respectively and sequentially connected with the voltage deviation treatment device, the energy management system and the shared energy storage coordination controller to form a third dispatching channel for generating a reactive compensation control signal for treating the voltage deviation of the user side and sending the reactive compensation control signal to the energy management system.
In this embodiment, the voltage deviation management device is composed of a prediction module, a power flow calculation module and a reactive compensation controller, wherein the prediction module is internally provided with an existing new energy prediction program and a load prediction program, and the active prediction module can effectively predict the new energy output information and the load information of each node at a future moment through existing meteorological information and new energy output and load historical information of each node. The load flow calculation module is responsible for receiving the prediction information, the active/reactive compensation capacity and the active charge-discharge power requirements of the user, which are sent by the voltage sag rapid compensation module and the dynamic harmonic suppression reactive compensation module, calculating to obtain the voltage change trend of the node where the user is located, further outputting the voltage change trend to the reactive compensator, and generating reactive compensation control signals for governing voltage deviation at a plurality of moments in the future.
Furthermore, the customized power integrated control module further comprises a display terminal, and the display terminal is connected with the energy management system and the shared energy storage coordination controller through an IO port and used for visualizing the scheduling actions of the energy management system and the shared energy storage coordination controller, so that manual monitoring and control are facilitated.
Furthermore, the shared energy storage coordination controller adopts the existing PCS coordination unified control framework and is responsible for receiving energy storage state monitoring data in the energy management systems of all the distributed energy storage subsystems, reasonably distributes charging and discharging operations to all the distributed energy storage subsystems according to total charging and discharging instructions from the energy management systems to realize coordination distribution of the distributed energy storage subsystems, and uniformly outputs the monitoring data to the A/D conversion unit so as to customize a visual module in the power integrated control module to realize artificial monitoring and control of the distributed energy storage subsystems.
In this embodiment, the shared energy storage coordination controller is connected to PCS1 to PCSn shown in fig. 1, and the EMS executes various control signals sent by the compensation device, so that the shared energy storage coordination controller selects the corresponding PCS to perform charge and discharge power control, and provides customized power services such as reactive power correction voltage deviation and voltage sag control by using the remaining capacity of the inverter.
The sequence numbers in the above embodiments are merely for description, and do not represent the sequence of the assembly or the use of the components.
The above description is only an embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (5)
1. A shared energy storage distributed scheduling system for customized power service comprises a plurality of distributed energy storage subsystems, user side loads correspondingly connected with the distributed energy storage subsystems and a customized power integrated control module, and is characterized in that the customized power integrated control module comprises a data acquisition unit, a compensation device, an energy management system and a shared energy storage coordination controller, the compensation device comprises a voltage sag compensation device and a dynamic harmonic suppression reactive power compensation device, and the data acquisition unit comprises a voltage collector and a current collector;
the voltage collector, the voltage sag compensation device, the energy management system and the shared energy storage coordination controller are sequentially connected to form a first scheduling channel; the current collector, the dynamic harmonic suppression reactive power compensation device, the energy management system and the shared energy storage coordination controller are sequentially connected to form a second scheduling channel; and the shared energy storage coordination controller is respectively connected with the charge and discharge power control switches of each distributed energy storage subsystem.
2. The customized power service-oriented shared energy storage distributed scheduling system of claim 1, wherein the input ends of the voltage collector and the current collector are connected to three-phase terminals of a user-side load;
the output end of the voltage collector is connected with the input end of the voltage sag compensation device through an A/D conversion unit;
and the output end of the current collector is connected with the input end of the dynamic harmonic suppression reactive power compensation device through an A/D conversion unit.
3. The distributed scheduling system for sharing energy storage facing to customized power service of claim 1, wherein the output terminal of the dynamic harmonic suppression reactive power compensation device is connected to the input terminal of the voltage sag compensation device.
4. The distributed scheduling system of shared energy storage facing to customized power service of claim 1, wherein the compensation device further comprises a voltage deviation management device, the data acquisition unit further comprises a meteorological sensor installed on a user side load, and a voltage collector, a current collector and the meteorological sensor in the data acquisition unit are respectively and sequentially connected with the voltage deviation management device, the energy management system and the shared energy storage coordination controller to form a third scheduling channel.
5. The distributed scheduling system for shared energy storage facing to customized power service as claimed in claim 1, wherein the customized power integration control module further comprises a display terminal, and the display terminal is connected to the energy management system and the shared energy storage coordination controller through an IO port, and is configured to visualize scheduling actions of the energy management system and the shared energy storage coordination controller.
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