CN113162068A - Energy storage system and peak-shaving frequency modulation system - Google Patents
Energy storage system and peak-shaving frequency modulation system Download PDFInfo
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- CN113162068A CN113162068A CN202110377023.4A CN202110377023A CN113162068A CN 113162068 A CN113162068 A CN 113162068A CN 202110377023 A CN202110377023 A CN 202110377023A CN 113162068 A CN113162068 A CN 113162068A
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
- H02J3/241—The oscillation concerning frequency
Abstract
The invention relates to an energy storage system comprising: the energy storage device is connected with the generator set and the power grid; the control device is connected with the energy storage device to control the energy storage device to store or output electric power; the control device is also connected with a remote terminal unit in the power plant to receive real-time operation data and instruction information of the power plant; the control device is also connected with the generator set control system to exchange state information with the generator set control system. The energy storage system can respond to the control instruction together with the generator set after receiving the control instruction of peak shaving frequency modulation sent by the power grid dispatching center, relieve the pressure of the generator set when processing the peak shaving frequency modulation task and reduce the energy consumption of the generator set end; meanwhile, compared with the traditional technical scheme of singly relying on a generator set to carry out peak shaving frequency modulation, the reaction speed, the adjusting precision and the adjusting efficiency of the peak shaving frequency modulation system can be improved by introducing an energy storage system as an auxiliary system.
Description
Technical Field
The invention relates to the technical field of power system frequency modulation, in particular to an energy storage system and a peak and frequency modulation system.
Background
At present, domestic electric power resources and economic distribution are unbalanced, and the load fluctuation of a power grid is large, so that the output electric energy needs to be subjected to peak shaving and frequency modulation in time at a power plant end to obtain high-quality electric energy to be input into the power grid. However, in the existing power plant, the peak-shaving frequency modulation is generally carried out on the electric energy by using a coal motor group, and is influenced by objective factors such as power supply coal quality fluctuation, large load fluctuation of a power grid system and the like, when the load rate is increased or decreased, the control system is difficult to ensure the stable parameters of the unit, so that the peak-shaving frequency modulation efficiency of the unit is reduced, the coal consumption is accelerated, and the economic benefit is poor.
In the conventional technical scheme, there are two different improvement ideas for the above problems:
1. and (3) coordinating and controlling optimization technology. The technology adopts a Control logic optimization method to achieve the purpose of improving the load response rate of the unit, mainly modifies the Control logic of the steam turbine air regulating valve to quickly respond to the load requirement of Automatic Generation Control (AGC), synchronously controls a fuel Control system to stabilize the pressure in front of the unit, and achieves the maximization of boiler heat storage utilization. The method has low modification cost, but low efficiency, small performance improvement space, the maximum is about 20 percent, and the pollution problem of using coal as fuel is not solved.
2. And (3) a condensed water throttling technology. The throttle valve is additionally arranged at the inlet of the condenser and used for controlling the instantaneous flow of condensed water so as to achieve the purpose of controlling the load output of the steam turbine. The mechanism is that the self-balancing characteristic of the heat regenerative system is utilized to reduce or increase the flow of condensed water so as to achieve the purpose of reducing or increasing the steam extraction amount of the turbine set and further adjusting the load of the turbine set. The method has limited performance improvement, generally about 10%. The unit still frequently turns back the load instruction under the way of Area Control Error (ACE), and parameter fluctuation and equipment abrasion are inevitable.
In conclusion, the traditional motor peak regulation and frequency modulation system is still low in efficiency, poor in performance improvement effect and the like after being transformed.
Disclosure of Invention
Therefore, it is necessary to provide an energy storage system and a peak-shaving frequency modulation system for solving the problems of low efficiency and poor performance of the conventional motor peak-shaving frequency modulation system.
One aspect of the present application provides an energy storage system, comprising: the energy storage device is connected with the generator set and the power grid; the control device is connected with the energy storage device to control the energy storage device to store or output electric power; the control device is also connected with a remote terminal unit in the power plant to receive real-time operation data and instruction information of the power plant; the control device is also connected with the generator set control system to exchange state information with the generator set control system.
The energy storage system is connected with the generator set control system and the remote terminal unit, can receive the running state and the control instruction of the power plant in real time, feed back the state information of the energy storage system to the generator set control system, and can respond to the control instruction together with the generator set after receiving the control instruction of peak-shaving frequency modulation sent by the power grid dispatching center, relieve the pressure of the generator set when processing the peak-shaving frequency modulation task, and reduce the energy consumption of the generator set end; meanwhile, compared with the traditional technical scheme of singly relying on a generator set to carry out peak shaving frequency modulation, the reaction speed, the adjusting precision and the adjusting efficiency of the peak shaving frequency modulation system can be improved by introducing an energy storage system as an auxiliary system.
In one embodiment, the energy storage device comprises one or more energy storage units, and each energy storage unit comprises an energy storage battery box and a variable voltage variable current box; the energy storage battery box is connected to the generator set and the power grid through the variable voltage variable flow box.
In one embodiment, the control device comprises a main control unit and a sub-control unit, wherein the main control unit sends a control instruction to the sub-control unit and receives a feedback signal sent by the sub-control unit; and the sub-control unit is arranged in the variable-voltage variable-current box and used for controlling the operation and the output of the energy storage system according to the control instruction sent by the main control unit.
In one embodiment, the energy storage battery box comprises a plurality of battery packs, wherein the battery packs comprise lithium iron phosphate battery packs.
Another aspect of the application provides a peak shaving frequency modulation system, comprising: the energy storage system of any of the above embodiments; the generator set control system is connected with the control device so as to realize the interaction of state information between the generator set and the energy storage system; and the remote terminal unit is connected with the control device and the generator set control system and used for receiving the dispatching instruction from the power grid dispatching center, forwarding the dispatching instruction to the control device and the generator set control system and feeding the output conditions of the energy storage system and the generator set back to the power grid dispatching center.
In one embodiment, the generator set control system is connected with the control device to realize the interaction of state information between the generator set and the energy storage system, and the method includes the following steps: the generator set control system sends first state information to the control device, wherein the first state information comprises at least one of generator set output information, a generator set actual load instruction, generator set AGC frequency modulation input feedback, a generator set primary frequency modulation action mark and generator set output amplitude limiting; and the control device sends second state information to the generator set control system, wherein the second state information comprises the running state information of the energy storage system.
In one embodiment, the output conditions of the energy storage system and the generator set include: the sum of the output of the energy storage system and the generator set.
In one embodiment, the main control unit obtains the control command according to the scheduling command and the generator set output information, and sends the control command to the sub-control unit.
In one embodiment, the peak shaving system further comprises: a digital intelligence system; the digital intelligent system comprises: the digital analysis module is used for simulating and visualizing the peak-shaving frequency modulation system; and the self-diagnosis module is used for detecting whether the analog quantity acquisition function is normal or not.
In one embodiment, the digital intelligent system further comprises: and the video monitoring module is used for monitoring the field conditions of the energy storage system and the generator set.
According to the peak-shaving frequency modulation system, the energy storage system and the generator set are introduced to process the peak-shaving frequency modulation task together, the existing generator set control system is improved in a targeted manner, and information interaction between the generator set control system and the energy storage system is increased, so that the peak-shaving frequency modulation task can be finished efficiently and at low cost, the abrasion and energy consumption of the generator set are reduced, and the system efficiency is improved.
Drawings
Fig. 1 is a block diagram of an energy storage system according to an embodiment.
FIG. 2 is a schematic diagram illustrating a connection relationship between the energy storage system shown in FIG. 1 and a power plant according to an embodiment.
Fig. 3 is a block diagram of another energy storage system according to an embodiment.
Fig. 4 is a block diagram of a peak shaving system according to an embodiment.
Fig. 5 is a schematic diagram illustrating a connection relationship between the peak shaving system shown in fig. 4 and a power plant according to an embodiment.
Fig. 6 is a block diagram of another peak shaving system according to an embodiment.
Reference is made to the accompanying drawings in which: 1. an energy storage system; 11. an energy storage device; 111. an energy storage battery box; 112. a variable-voltage variable-current box; 12. a control device; 2. a generator set control system; 3. a remote terminal unit; 4. a power grid; 5. a generator set; 6. a power grid dispatching center; 7. digital intelligent system.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In describing positional relationships, unless otherwise specified, when an element such as a layer, film or substrate is referred to as being "on" another layer, it can be directly on the other layer or intervening layers may also be present. Further, when a layer is referred to as being "under" another layer, it can be directly under, or one or more intervening layers may also be present. It will also be understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present.
Where the terms "comprising," "having," and "including" are used herein, another element may be added unless an explicit limitation is used, such as "only," "consisting of … …," etc. Unless mentioned to the contrary, terms in the singular may include the plural and are not to be construed as being one in number.
Due to the change of the load end of the power grid, the frequency of the power grid may change instantly, which requires the generator set of the power plant end to be adjusted quickly within an allowable range to make up for the load gap of the power grid and ensure the stability of the frequency of the power grid. However, when the grid frequency changes, the conventional technical solution is to automatically change the air inflow of the turbine and the water inflow of the turbine through the speed regulator of the generator set to increase or decrease the output of the generator. This process is a slow mechanical transmission process with limited improvement.
In order to improve the efficiency of the peak-shaving frequency modulation of the power plant unit and reduce the equipment loss, the first aspect of the application discloses an energy storage system. The energy storage system can be incorporated into an existing generator set and other supporting equipment, such as a generator set control system, so as to improve the peak and frequency regulation capability of a power plant end. As shown in fig. 1, the energy storage system 1 in the present embodiment includes: the energy storage device 11 is connected with the generator set and the power grid; a control device 12 connected to the energy storage device 11 to control the energy storage device 11 to store or output electric power; the control device 12 is also connected with a remote terminal unit in the power plant to receive real-time operation data and instruction information of the power plant; the control device 12 is also connected to a genset control system to exchange status information with the genset control system.
Fig. 2 shows the connection relationship of the energy storage system 1 with other parts in a power plant when the energy storage system is applied to peak shaving frequency modulation. The energy storage device 11 is connected to the power grid 4 and the generator set 5, and can store the electric energy generated by the generator set 5 when the load of the power grid 4 is small, or provide the electric energy to the power grid 4 together with the generator set 5 when the load of the power grid 4 is large, so as to realize the peak shaving function. In addition, the energy storage system 1 and the generator set 5 are both connected with the power grid 4, when the load of the power grid 4 fluctuates and frequency modulation is needed, the remote terminal unit 3 in the power plant can simultaneously send a scheduling instruction to the control device 12 in the energy storage system 1 and the generator set control system 2, the energy storage system 1 can make a response quickly, adjustment needed by the generator set 5 due to frequency change of the power grid 4 is reduced, and unit loss is reduced. Furthermore, the control device 12 in the energy storage system 1 is connected to the generator set control system 2 for exchanging status information, such as respective output information, so that the generator set control system 2 integrates the output information to obtain an output feedback signal.
In one embodiment, the energy storage device 11 comprises one or more energy storage units, and the energy storage units comprise an energy storage battery box 111 and a variable voltage variable current box 112; the energy storage battery box 111 is connected to the generator set 5 and the power grid 4 through the transformer box 112. Taking the energy storage device 11 with one energy storage unit as an example, as shown in fig. 3, the energy storage battery box 111 is used for storing electric energy. The energy storage battery box 111 can contain a plurality of battery packs, and parameters such as storage capacity and storage voltage of each energy storage battery box 111 can be flexibly adjusted by changing the number of the battery packs.
As an example, the battery pack in the energy storage battery box 111 may be a lithium iron phosphate battery pack. The lithium iron phosphate battery pack has autonomous balancing capability. The autonomous balance capability means that an electrochemical self-protection mechanism for preventing overcharge is established in the battery by adding a certain proportion of oxidation-reduction additives (such as acetyl ferrocene, cerous pentanitrate quaternary ammonium salt and the like) into the electrolyte. The lithium iron phosphate battery with the autonomous balancing capability can effectively solve the problem of battery overcharge.
With continued reference to fig. 3, the transformer tank 112 is directly connected to the energy storage battery tank 111. The transformer box 112 is used for adjusting the voltage and the current output by the energy storage battery box 111 to obtain the alternating current meeting the conditions. As an example, 4 500kW energy storage bidirectional converters and 1 2200kVA double split transformer are disposed inside the transformer/converter box 112. The energy storage battery box 111 is charged and discharged through an energy storage bidirectional converter. The electric energy in the energy storage battery box 111 passes through the double-splitting transformer, the voltage can be increased to 6KV and then the high-voltage ring network container is connected, and the high-voltage ring network container is connected with the generator set 5 and/or the power grid 4. Wherein the transformer tank 112 may be a medium voltage transformer container.
In one embodiment, the control device 12 includes a main control unit and a sub-control unit, wherein the main control unit sends a control instruction to the sub-control unit and receives a feedback signal sent by the sub-control unit; the sub-control unit is disposed in the variable voltage and variable current box 112, and is configured to control operation and output of the energy storage system 1 according to the control instruction sent by the main control unit.
Specifically, the sub-control unit may be installed in the variable voltage variable flow box 112, so as to receive a control instruction sent by the main control unit and control the operation and output of the energy storage system 1. The location of the master control unit is not limited herein. The main control unit and the sub-control units can be in communication connection in a wired mode or a wireless mode. Meanwhile, because the energy storage battery box 111 is connected with the voltage transformation current transformation box 112, the sub-control unit can also be configured to monitor the residual capacity condition, the output condition and the like of the energy storage battery box 111 in real time and feed back the information to the main control unit.
Specifically, the main control unit is also connected with the remote terminal unit 3 and receives a scheduling instruction sent by the power grid scheduling center 6; the main control unit is further connected with the generator set control system 2 to obtain the real output condition of the generator set 5, and synthesize the scheduling instruction and the output condition of the generator set 5, and the main control unit can obtain the output instruction of the energy storage system 1 and send the output instruction to each sub-control unit to control the energy storage battery box 111 to output power to the power grid 4 through the voltage transformation and current transformation box 112.
A second aspect of the present application provides a peak shaving frequency modulation system. Fig. 4 shows a structural block diagram of the peak shaving frequency modulation system, and fig. 5 shows a connection relationship between the peak shaving frequency modulation system and other parts of the power plant when the peak shaving frequency modulation system performs peak shaving frequency modulation. The peak-shaving frequency modulation system in the embodiment comprises: the energy storage system 1 according to any of the above embodiments; the generator set control system 2 is connected with the control device 12 to realize the interaction of state information between the generator set 5 and the energy storage system 1; and the remote terminal unit 3 is connected with the control device 12 and the generator set control system 2, and is used for receiving a scheduling instruction from the power grid scheduling center 6, forwarding the scheduling instruction to the control device 12 and the generator set control system 2, and feeding back the output conditions of the energy storage system 1 and the generator set 5 to the power grid scheduling center 6.
The generator set control system 2 may be a Distributed Control System (DCS) for controlling the generator set 5. The distributed control system generally comprises a distributed processing unit, a process input/output channel, a data communication system, a human-computer interface and the like, and has the characteristics of easy configuration and easy expansion. The distributed control system is used for controlling the generator set 5, even if a certain component in the system breaks down, the work of the whole system cannot be influenced, and the reliability of the control system can be greatly improved.
In this embodiment, the generator set control system 2 is connected to the control device 12 of the energy storage system 1, so that the state information interaction between the generator set 5 and the energy storage system 1 is realized. On this basis, when the generator set control system 2 and the control device 12 receive the scheduling instruction from the power grid scheduling center 6, the generator set 5 and the energy storage device 11 can respond to the scheduling instruction as a whole, so that specific output requirements are reasonably distributed to the generator set 5 and the energy storage device 11, and the output pressure of the generator set 5 is reduced.
The Remote Terminal Unit 3(Remote Terminal Unit, RTU) is a special computer measurement and control Unit with modular structure designed for long communication distance and severe industrial field environment, and it connects the Terminal detection instrument and execution mechanism with the main computer of the Remote control center, and has the functions of Remote data acquisition, control and communication, and can receive the operation instruction of the main computer and control the action of the execution mechanism at the Terminal.
In the present embodiment, the remote terminal unit 3 receives a scheduling command, for example, an AGC command (Automatic Generation Control) from the grid scheduling center 6, and transfers the AGC command to the Control device 12 and the genset Control system 2. The AGC command can control the output of the generator set 5, and maintain the system frequency near a rated value. After receiving the AGC instruction, the generator set control system 2 controls the generator set 5 to respond to the AGC instruction according to a conventional flow, and sends the generator set output information to the control device 12 of the energy storage system 1. After receiving the unit output information and the AGC instruction, the control device 12 obtains the output data of the energy storage system 1 through algorithm calculation, generates an output instruction, and sends the output instruction to each sub-control unit to control the output of the energy storage system 1. The sub-control unit feeds back the output information of the energy storage system 1 to the main control unit, and the output information is sent to the generator set control system 2 by the main control unit, so that state information interaction between the sub-control unit and the generator set control system 2 is realized.
In addition, the remote terminal unit 3 may also receive the output conditions of the energy storage system 1 and the generator set 5 from the generator set control system 2, and feed the output conditions back to the power grid dispatching center 6, so as to provide a reference for the power grid dispatching center 6 to generate a dispatching instruction. As an example, the output conditions of the energy storage system 1 and the generator set 5 include: the sum of the output of the energy storage system 1 and the generator set 5. The remote terminal unit 3 returns the sum of the output of the energy storage system 1 and the generator set 5 to the power grid dispatching center 6 without adding a new telemetering return point.
In one embodiment, the interaction of the state information between the genset 5 and the energy storage system 1 includes: the generator set control system 2 sends first state information to the control device 12, wherein the first state information comprises at least one of generator set 5 output information, a generator set 5 actual load instruction, generator set 5AGC frequency modulation input feedback, a generator set 5 primary frequency modulation action mark and generator set 5 output amplitude limiting; the control device 12 sends second status information to the generator set control system 2, where the second status information includes operating status information of the energy storage system 1. The operating state information of the energy storage system 1 in the second state information may include a processing condition of the energy storage device 11 and a remaining capacity condition of the energy storage device 11. In this embodiment, through sufficient information interaction between the generator set 5 and the energy storage system 1, monitoring of the generator set control system 2 on the energy storage system 1 can be enhanced, and the overall adjusting capability of the peak shaving frequency modulation system is improved.
In one embodiment, the main control unit obtains the control command according to the scheduling command and the generator set 5 output information, and sends the control command to the sub-control unit. Wherein, the main control unit receives the dispatching instruction from the remote terminal unit 3 and receives the output information of the generator set 5 from the generator set control system 2. And after information processing, calculating to obtain output information of the energy storage device 11, generating a control instruction according to the output information, sending the control instruction to each sub-control unit, and controlling the energy storage device 11 to perform specific output so as to realize peak regulation and/or frequency modulation. The peak-shaving frequency modulation system in the embodiment can improve the speed and the accuracy of peak-shaving frequency modulation and improve the system efficiency by introducing the energy storage system 1 to assist in processing the peak-shaving frequency modulation task.
In one embodiment, the peak shaving system further comprises a digital intelligence system 7. The digital intelligent system 7 includes: the digital analysis module is used for simulating and visualizing the peak-shaving frequency modulation system; and the self-diagnosis module is used for detecting whether the analog quantity acquisition function is normal or not. The digital analysis module can visualize the peak and frequency modulation system through simulation, and display each module of the peak and frequency modulation system on the display device, so that a user can know the system state intuitively. And the self-diagnosis module is used for detecting the analog quantity acquisition function. The analog quantity acquisition function refers to an acquisition function of voltage and current. Only when the analog quantity acquisition function is normal, the real-time current and voltage data in each part of the system can be correctly acquired, and therefore the system state information is correctly acquired on the basis of the real-time current and voltage data. As an example, the self-diagnosis module may include a battery failure diagnosis function to check whether each battery pack in the energy storage battery box 111 has failed. The self-diagnosis result can be stored locally, and also can be uploaded to the power grid dispatching center 6 or an upper computer in real time, so that maintenance personnel can be reminded to repair the peak-adjusting frequency modulation system in time.
By introducing the digital intelligent system 7, the intelligent degree of the peak-shaving frequency-modulation system can be improved, and a user can conveniently and visually know and check the states of all parts in the peak-shaving frequency-modulation system. Meanwhile, through the self-diagnosis module, faults in the peak-shaving frequency modulation system can be found in time and processed in time, and the operation reliability of the system is improved.
In one embodiment, the digital intelligent system 7 further comprises: and the video monitoring module is used for monitoring the field conditions of the energy storage system 1 and the generator set 5. Specifically, the video monitoring module may include a plurality of monitoring devices, and perform all-weather video monitoring on the field conditions of the generator set 5 and the energy storage system 1. The monitoring video can be uploaded to a monitoring center through a network, and local backup can also be carried out through a storage device. As an example, the local video is saved for 3 months.
The third aspect of the present application further provides a peak shaving frequency modulation method, including: receiving a scheduling instruction, wherein the scheduling instruction is from a power grid scheduling center; responding to the scheduling instruction, and controlling the energy storage system to store or output electric power; superposing the output information of the generator set and the output information of the energy storage system to obtain a set output feedback signal; and sending the unit output feedback signal to the power grid dispatching center.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An energy storage system, comprising:
the energy storage device is connected with the generator set and the power grid;
the control device is connected with the energy storage device to control the energy storage device to store or output electric power;
the control device is also connected with a remote terminal unit in the power plant to receive real-time operation data and instruction information of the power plant;
the control device is also connected with the generator set control system to exchange state information with the generator set control system.
2. The energy storage system of claim 1, wherein the energy storage device comprises one or more energy storage units, the energy storage units comprising an energy storage battery box and a variable voltage variable current box;
the energy storage battery box is connected to the generator set and the power grid through the variable voltage variable flow box.
3. The energy storage system of claim 2, wherein the control device comprises a main control unit and a sub-control unit, and the main control unit sends a control instruction to the sub-control unit and receives a feedback signal sent by the sub-control unit; and the sub-control unit is arranged in the variable-voltage variable-current box and is used for controlling the operation and the output of the energy storage system according to the control instruction sent by the main control unit.
4. The energy storage system of claim 2, wherein the energy storage battery box comprises a plurality of battery packs, the battery packs comprising lithium iron phosphate battery packs.
5. A peak shaving frequency modulation system, comprising:
the energy storage system of any one of claims 1-4;
the generator set control system is connected with the control device so as to realize the interaction of state information between the generator set and the energy storage system;
and the remote terminal unit is connected with the control device and the generator set control system and used for receiving a scheduling instruction from a power grid scheduling center, forwarding the scheduling instruction to the control device and the generator set control system and feeding the output conditions of the energy storage system and the generator set back to the power grid scheduling center.
6. The system of claim 5, wherein the generator set control system is coupled to the control device to enable interaction of status information between the generator set and the energy storage system, and comprises:
the generator set control system sends first state information to the control device, wherein the first state information comprises at least one of generator set output information, a generator set actual load instruction, generator set AGC frequency modulation input feedback, a generator set primary frequency modulation action mark and generator set output amplitude limiting;
and the control device sends second state information to the generator set control system, wherein the second state information comprises the running state information of the energy storage system.
7. The peak shaving system of claim 5, wherein the output conditions of the energy storage system and the generator set comprise: the sum of the output of the energy storage system and the generator set.
8. The peak-shaving frequency modulation system according to claim 6, wherein the main control unit obtains the control command according to the scheduling command and the generator set output information, and sends the control command to the sub-control units.
9. The peak shaving system according to claim 5, further comprising: a digital intelligence system; the digital intelligent system comprises:
the digital analysis module is used for simulating and visualizing the peak-shaving frequency modulation system; and
and the self-diagnosis module is used for detecting whether the analog quantity acquisition function is normal or not.
10. The peak shaving system according to claim 9, wherein the digital intelligence system further comprises: and the video monitoring module is used for monitoring the on-site conditions of the energy storage system and the generator set.
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