CN113381437A - Optical storage system sub-array EMS system and control method thereof - Google Patents

Optical storage system sub-array EMS system and control method thereof Download PDF

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Publication number
CN113381437A
CN113381437A CN202010158759.8A CN202010158759A CN113381437A CN 113381437 A CN113381437 A CN 113381437A CN 202010158759 A CN202010158759 A CN 202010158759A CN 113381437 A CN113381437 A CN 113381437A
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power
energy storage
ems
sub
storage system
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Inventor
谢小平
庞秀岚
崇锋
马丽
李宪
赵欣昕
倪昊
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State Power Investment Group Qinghai Photovoltaic Industry Innovation Center Co Ltd
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State Power Investment Group Qinghai Photovoltaic Industry Innovation Center Co Ltd
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Priority to CN202010158759.8A priority Critical patent/CN113381437A/en
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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
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
    • Y04S10/123—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving renewable energy sources
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/14—Energy storage units

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention aims to disclose a sub-matrix EMS system of an optical storage system and a control method thereof, which consists of three layers of structures, wherein the first layer is a sub-matrix EMS unit and receives instructions issued by a station-control AGC/AVC system or a rapid frequency modulation system and the station-control EMS unit to complete optical storage power control in situ; the second layer is a converter EMU unit which receives the instruction issued by the sub-square matrix EMS unit and completes the instruction distribution and issue to the energy storage converter (PCS); the third layer is an energy storage converter (PCS) which receives an instruction issued by an EMU unit of the converter and completes the charging and discharging control of the energy storage battery system; the group string type inverter directly receives an instruction issued by the sub-matrix EMS unit to complete the power control of the photovoltaic; compared with the prior art, the system response time is greatly reduced, and the response speed is improved; the control link is simple, corresponding equipment is reduced, and the economic benefit is improved; the equipment reduction reduces the system failure rate, improves the operation reliability and stability of the power station, and achieves the purpose of the invention.

Description

Optical storage system sub-array EMS system and control method thereof
Technical Field
The present invention relates to a subarray EMS system and a control method thereof, and more particularly, to a subarray EMS system of an optical storage system and a control method thereof.
Background
The conventional optical storage system is composed of a four-layer architecture. The first layer is station control EMS, which receives the command issued by the dispatching AGC/AVC host machine to complete the light storage active/reactive control of the whole station; the second layer is a photovoltaic power generation unit host and an energy storage AGC/AVC slave, receives the instruction issued by the station control level EMS, and completes the instruction distribution and issue to the sub-square matrix communication control unit and the converter EMU; the third layer is a sub-square matrix communication control unit and a converter EMU, receives the instructions issued by the photovoltaic power generation unit host and the energy storage AGC/AVC slave, and completes the distribution and the issuing of the photovoltaic inverter and the PCS instruction; and the fourth layer comprises a photovoltaic inverter and an energy storage converter (PCS), and receives instructions issued by the sub-square matrix communication control unit and the EMU to complete the power output of the photovoltaic inverter and the charge and discharge control of the BMS and the energy storage battery system.
The control strategy of the conventional optical storage system is as follows:
(1) and the station control level EMS receives a command sent by the dispatching AGC/AVC system as the maximum power Pmax of the point of connection.
(2) And the station control level EMS acquires the actual output (photovoltaic + stored energy) Ppsc of the grid-connected point of the photovoltaic power station in real time.
1) And if Pbcc is larger than Pmax, the energy storage system starts to be charged, and the charging power Pcharge is the difference value of the two. If the difference between the two is greater than the allowable charging power of the energy storage system, the energy storage system is charged according to the rated power, and the photovoltaic power is limited; if the battery is in a full-charge state, the charging power of the energy storage system is 0, and the photovoltaic power is limited; and thirdly, if the difference between the two is smaller than the allowable charging power of the energy storage system, the energy storage system is charged according to the difference power, and the photovoltaic is controlled not to be limited.
2) If Ppsc < Pmax, the energy storage system starts to discharge, and the discharge power Pdisscharge is the difference between the Ppcc and Pmax. If the difference between the two is greater than the rated power of the energy storage system, the energy storage system discharges according to the rated power, and the photovoltaic is controlled not to be limited; if the battery is in an emptying state, the discharge power of the energy storage system is 0, and the photovoltaic power is controlled not to be limited; and thirdly, if the difference between the two is smaller than the rated power of the energy storage system, the energy storage system discharges according to the difference power, and the photovoltaic is controlled not to be limited.
Traditional light stores up system control strategy: the station control level EMS centrally manages each photovoltaic unit and each energy storage unit, and the station control level EMS issues instructions to the photovoltaic power station monitoring system and the energy storage monitoring system according to the light power prediction, AGC/AVC system, the charge state of the energy storage units, photovoltaic output condition and the like to control the photovoltaic output and the charging and discharging of the storage battery. The overall architecture is that the station control level EMS receives a command issued by the AGC/AVC host, the photovoltaic power generation unit host and the energy storage AGC/AVC slave receive a control command issued by the station control level EMS, and the sub-square matrix communication control unit and the converter EMU carry out command distribution and issue to carry out coordinated control on photovoltaic and energy storage output. The traditional control strategy has more control logic links, so that the response time is too long, and the reliability and stability of the operation of the power station are not facilitated.
Therefore, a sub-array EMS system of an optical storage system and a control method thereof are particularly needed to solve the above existing problems.
Disclosure of Invention
The invention aims to provide a light storage system subarray EMS system and a control method thereof, aiming at the defects of the prior art, the subarray photovoltaic output and the energy storage system output can be controlled in a self-coordinated manner, the system response time is greatly reduced, and the system response speed is improved; the whole control link is simplified, the equipment is reduced, and the economic benefit is higher; the operation reliability and stability of the power station are improved.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
in a first aspect, the invention provides a photonic storage system (EMS) sub-matrix system and a control method thereof, which are characterized in that the EMS system consists of three layers of architectures, wherein the first layer is a sub-matrix EMS unit and receives instructions issued by a station control level AGC/AVC system or a rapid frequency modulation system and a station control level EMS unit to complete the optical storage power control in situ; the second layer is a converter EMU unit which receives the instruction issued by the sub-square matrix EMS unit and completes the instruction distribution and issue to the energy storage converter (PCS); the third layer is an energy storage converter (PCS) which receives an instruction issued by an EMU unit of the converter and completes the charging and discharging control of the energy storage battery system; and the group string type inverter directly receives the instruction sent by the sub-square-matrix EMS unit to complete the power control of the photovoltaic.
In an embodiment of the invention, the station-control AGC/AVC system or the rapid frequency modulation system and the station-control EMS unit are respectively and directly in communication connection with the data acquisition device of the subarray EMS unit through the optical fiber ring network switch of the photovoltaic power station monitoring system.
In one embodiment of the invention, the string inverter is communicatively connected to a PLC power carrier module in a data acquisition device of the sub-array EMS unit.
In one embodiment of the invention, the station-controlled AGC/AVC system and the fast frequency modulation system have locking control, and the sub-array EMS unit only receives the instruction of one system at any time.
In a second aspect, the present invention provides a method for controlling an EMS system of a photonic storage system, which is characterized in that the method comprises the following steps:
(1) the method comprises the following steps that a sub-square matrix EMS unit receives an instruction issued by a station control AGC/AVC system or a rapid frequency modulation system and the station control EMS unit, calculates 1.1-1.3 times rated power of a sub-square matrix booster box transformer substation, and takes the minimum value of the above values as the maximum grid-connected point power Pmax of the sub-square matrix;
(2) the power Ppsc of a substation grid-connected point of the sub-square array booster box is acquired by the sub-square array EMS unit in real time;
(3) and calculating the difference value of Pmax and Ppsc, and finishing the control of charging and discharging the photovoltaic power and the stored energy by taking the relation between the difference value of Pmax and Ppsc and the rated power of the energy storage system as a criterion.
In one embodiment of the invention, if Ppcc > Pmax, the energy storage system starts charging, and the charging power Pcharge is the difference between the two.
Further, if the difference between Pmax and Ppsc is larger than the rated power of the energy storage system, the energy storage system is charged according to the rated power, and the photovoltaic power is limited, so that the grid-connected point power is equal to the maximum allowed grid-connected power Pmax of the sub-square matrix.
Further, if the battery is in a full-charge state, the charging power of the energy storage system is 0, and the photovoltaic power is limited, so that the grid-connected point power is equal to the maximum allowed grid-connected power Pmax of the sub-square matrix.
Further, if the difference between Pmax and Ppsc is smaller than the rated power of the energy storage system, the energy storage system is charged according to the power of the difference, and the photovoltaic is controlled not to be limited.
In one embodiment of the invention, if Ppsc < Pmax, the energy storage system starts to discharge, and the discharge power Pdisscharge is the difference between Pqcc and Pmax.
Further, if the difference between Pmax and Ppsc is larger than the rated power of the energy storage system, the energy storage system discharges according to the rated power, and the photovoltaic is controlled not to be limited;
further, if the battery is in an emptying state, the discharging power of the energy storage system is 0, and the photovoltaic power is controlled not to be limited;
further, if the difference between Pmax and Ppsc is smaller than the rated power of the energy storage system, the energy storage system discharges according to the power of the difference, and the photovoltaic is controlled not to be limited.
In one embodiment of the invention, the station-controlled AGC/AVC system and the fast frequency modulation system have locking control, and the sub-array EMS unit only receives the instruction of one system at any time.
Compared with the prior art, the subarray-level EMS unit can directly receive the instructions sent by the AGC/AVC system or the rapid frequency modulation system and the station-control-level EMS unit to set or adjust the photovoltaic output and the energy storage system charge-discharge strategy, and can automatically coordinate and control the subarray photovoltaic output and the energy storage system output, so that the system response time is greatly reduced, and the response speed is improved; the control link is simple, corresponding equipment is reduced, and the economic benefit is improved; the equipment reduction reduces the system failure rate, improves the operation reliability and stability of the power station, and achieves the purpose of the invention.
The features of the present invention will be apparent from the accompanying drawings and from the detailed description of the preferred embodiments which follows.
Drawings
Fig. 1 is a schematic structural diagram of a light storage system subarray EMS system according to the present invention;
fig. 2 is a schematic flow chart illustrating a control method of the optical storage system subarray EMS system according to the present invention;
FIG. 3 is a schematic diagram of the control flow for transient conditions of the present invention;
FIG. 4 is a schematic diagram of the control flow of the abnormal operating condition of the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
Examples
As shown in fig. 1, the optical storage system subarray EMS system of the present invention is composed of three layers of architectures, the first layer is a subarray EMS unit, receives instructions issued by a station-controlled AGC/AVC system or a fast frequency modulation system and a station-controlled EMS unit, and completes optical storage power control in situ; the second layer is a converter EMU unit which receives the instruction issued by the sub-square matrix EMS unit and completes the instruction distribution and issue to the energy storage converter (PCS); the third layer is an energy storage converter (PCS) which receives an instruction issued by an EMU unit of the converter and completes the charging and discharging control of the energy storage battery system; and the group string type inverter directly receives the instruction sent by the sub-square-matrix EMS unit to complete the power control of the photovoltaic.
In this embodiment, the station-control-level AGC/AVC system or the fast frequency modulation system and the station-control-level EMS unit are respectively and directly connected to the data acquisition device of the sub-array EMS unit through the optical fiber ring network switch on the spacer layer of the monitoring system of the photovoltaic power station.
In the present embodiment, the string inverter is communicatively connected to the PLC power carrier module in the data acquisition device of the sub-array EMS unit.
In this embodiment, the station-controlled AGC/AVC system and the fast fm system have lock control, and the sub-array EMS unit receives only one system command at any time.
The adopted sub-array communication control equipment mainly comprises a Logger3000 data collector, an MIEN6208 optical fiber switch, an EMS200 type EMS controller, an optical fiber terminal box and other equipment. The sub-matrix communication control equipment can also be composed of SACU2000B intelligent sub-matrix controller, optical fiber distribution box and other equipment. The sub-square matrix communication control equipment can also comprise an SAU data acquisition unit, a switch, an optical fiber terminal box and other equipment.
As shown in fig. 2, the method for controlling the optical storage system subarray EMS system of the present invention includes the following steps:
(1) the method comprises the following steps that a sub-square matrix EMS unit receives instructions issued by a station control level AGC/AVC system or a rapid frequency modulation system and the station control level EMS unit, calculates 1.1-1.3 times rated power of a booster box transformer substation, and takes the minimum value of the above values as the maximum grid-connected point power Pmax of a sub-square matrix;
(2) the power Ppsc of a transformer substation grid-connected point of the booster box is acquired by a sub-square EMS unit in real time;
(3) and calculating the difference value of Pmax and Ppsc, and finishing the control of charging and discharging the photovoltaic power and the stored energy by taking the relation between the difference value of Pmax and Ppsc and the rated power of the energy storage system as a criterion.
In this embodiment, if Ppcc > Pmax, the energy storage system starts to charge, and the charging power Pcharge is the difference between the two.
And if the difference between Pmax and Ppsc is larger than the rated power of the energy storage system, the energy storage system is charged according to the rated power, and the photovoltaic power is limited, so that the power of the grid-connected point is equal to the maximum allowed grid-connected power Pmax of the sub-square matrix.
And if the battery is in a full-charge state, the charging power of the energy storage system is 0, and the photovoltaic power is limited, so that the grid-connected point power is equal to the maximum allowed grid-connected power Pmax of the sub-square matrix.
And if the difference between Pmax and Ppsc is smaller than the rated power of the energy storage system, the energy storage system is charged according to the power of the difference, and the photovoltaic is controlled not to be limited.
In this embodiment, if Ppcc < Pmax, the energy storage system starts to discharge, and the discharge power Pdischarge is the difference between them.
If the difference between Pmax and Ppsc is larger than the rated power of the energy storage system, the energy storage system discharges according to the rated power, and the photovoltaic is controlled not to be limited;
if the battery is in an emptying state, the discharging power of the energy storage system is 0, and the photovoltaic power is controlled not to be limited;
and if the difference between Pmax and Ppsc is smaller than the rated power of the energy storage system, the energy storage system discharges according to the power of the difference, and the photovoltaic is controlled not to be limited.
The control method of the optical storage system subarray EMS system can be realized by the following modes: the sub-matrix communication control equipment receives instructions of a station control level AGC/AVC system, a rapid frequency modulation system and a station control level EMS unit, collects box transformer substation measurement and control and kilowatt-hour meter signals, photovoltaic and energy storage output power, and uniformly coordinates, distributes and controls photovoltaic and energy storage output.
And (3) limiting power management of the subarrays: and controlling the photovoltaic and energy storage output to be not more than 1.1 times of the rated capacity of the box transformer substation.
And (4) storing and charging the energy until the energy is fully stored when the photovoltaic power limit (including AGC/fast frequency and 1.1 times rated capacity of the box transformer) is achieved.
And energy storage and discharge when the photovoltaic is not limited in power.
The output is controlled by instructions such as a station control level AGC/AVC system, a rapid frequency modulation system and the like, the response requirements of the station control level AGC/AVC system or the rapid frequency modulation system are met, the overall logic energy storage response is limited, and when the energy storage does not respond, the photovoltaic response is carried out.
The control method of the optical storage system subarray EMS system can be realized by the following modes:
transient state working condition: and judging the schedulable power range and the working time length according to the energy storage SOC, selecting a proper time to maximally slow down the fluctuation of the power of the photovoltaic area, reducing the impact on the power fluctuation of the power grid and realizing smooth power output. The control flow is shown in fig. 3.
In the figure: pold: and a state power value on the photovoltaic area inverter.
Pnew: and the current state power value of the photovoltaic area inverter.
Steady state conditions: when the total power of the grid-connected point is limited to AGC commands or fast frequency commands or does not exceed rated transformer load when the power is not limited. And (4) preferably starting PCS adjustment, and if the adjustment capacity of the PCS is exceeded, limiting photovoltaic output.
Abnormal working conditions: when the battery is fully charged/discharged or the energy storage converter fails, the power of P1 is limited not to be larger than Pout power, and the transformer is ensured not to be overloaded. The control flow is shown in fig. 4.
In the figure: pout P1+ P2.
Pout: and (4) the total AC outlet power value of the grid-connected point.
P1: true power of the photovoltaic inverter.
P2: and setting the power of the energy storage converter.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.

Claims (14)

1. A sub-matrix EMS system of an optical storage system is characterized by comprising three layers of structures, wherein the first layer is a sub-matrix EMS unit and receives instructions sent by a station-controlled AGC/AVC system or a rapid frequency modulation system and a station-controlled EMS unit to complete optical storage power control in situ; the second layer is a converter EMU unit which receives the instruction issued by the sub-square matrix EMS unit and completes the instruction distribution and issue to the energy storage converter (PCS); the third layer is an energy storage converter (PCS) which receives an instruction issued by an EMU unit of the converter and completes the charging and discharging control of the energy storage battery system; and the group string type inverter directly receives the instruction sent by the sub-square-matrix EMS unit to complete the power control of the photovoltaic.
2. The EMS system of claim 1, wherein the station AGC/AVC system or the fm system and the EMS unit are communicatively connected to the data collecting device of the EMS unit through the optical fiber ring network switch of the monitoring system of the pv power station.
3. The EMS system of claim 1, wherein the string inverter is communicatively coupled to the PLC module of the data acquisition device of the EMS unit.
4. The EMS system of claim 1, wherein the station level AGC/AVC system has latch-up control with the fast fm system, and the EMS unit of the subarray receives commands from only one of the systems at any one time.
5. A control method of a light storage system subarray EMS system is characterized by comprising the following steps:
(1) the method comprises the following steps that a sub-square matrix EMS unit receives an instruction issued by a station control AGC/AVC system or a rapid frequency modulation system and the station control EMS unit, calculates 1.1-1.3 times rated power of a sub-square matrix booster box transformer substation, and takes the minimum value of the above values as the maximum grid-connected point power Pmax of the sub-square matrix;
(2) the power Ppsc of a substation grid-connected point of the sub-square array booster box is acquired by the sub-square array EMS unit in real time;
(3) and calculating the difference value of Pmax and Ppsc, and finishing the control of charging and discharging the photovoltaic power and the stored energy by taking the relation between the difference value of Pmax and Ppsc and the rated power of the energy storage system as a criterion.
6. The method of claim 5, wherein if Pbcc > Pmax, the energy storage system starts to charge, and the charging power Pcharge is a difference value between Pccge and Pmax.
7. The method of claim 6, wherein if the difference between Pmax and Ppcc is greater than the rated power of the energy storage system, the energy storage system is charged according to the rated power, and starts to limit the photovoltaic power so that the grid-connected point power is equal to the maximum allowable grid-connected power Pmax of the sub-square matrix.
8. The method of claim 6, wherein if the battery is in a fully charged state, the energy storage system charging power is 0, and the limitation of the photovoltaic power is started, so that the grid-connected point power is equal to the maximum allowed grid-connected power Pmax of the sub-square matrix.
9. The method of claim 6, wherein if the difference between Pmax and Ppcc is smaller than the rated power of the energy storage system, the energy storage system is charged according to the power of the difference, and the photovoltaic power is controlled without limitation.
10. The method of claim 5, wherein if Ppsc < Pmax, the energy storage system starts to discharge, and the discharge power Pdisscharge is the difference between Pqcc and Pmax.
11. The control method of the optical storage system subarray EMS system of claim 10, wherein if the difference between Pmax and Ppcc is greater than the rated power of the energy storage system, the energy storage system discharges according to the rated power and controls the photovoltaic not to be limited;
12. the method of claim 10, wherein if the battery is in a discharged state, the discharge power of the energy storage system is 0, and the photovoltaic power is controlled not to be limited;
13. the method of claim 10, wherein if the difference between Pmax and Ppcc is smaller than the rated power of the energy storage system, the energy storage system discharges according to the power of the difference, and controls the photovoltaic system not to be limited.
14. The method of claim 5, wherein the station-controlled AGC/AVC system has latch-up control with the fast frequency modulation system, and the subarray EMS unit receives only one of the systems at any time.
CN202010158759.8A 2020-03-09 2020-03-09 Optical storage system sub-array EMS system and control method thereof Pending CN113381437A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115967113A (en) * 2022-12-28 2023-04-14 南京南瑞继保电气有限公司 Rapid power control method and system suitable for networking equipment
CN116760189A (en) * 2023-08-08 2023-09-15 山东电工时代能源科技有限公司 EMS monitoring system suitable for large-scale energy storage power station

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115967113A (en) * 2022-12-28 2023-04-14 南京南瑞继保电气有限公司 Rapid power control method and system suitable for networking equipment
CN115967113B (en) * 2022-12-28 2024-06-18 南京南瑞继保电气有限公司 Rapid power control method and system suitable for network construction equipment
CN116760189A (en) * 2023-08-08 2023-09-15 山东电工时代能源科技有限公司 EMS monitoring system suitable for large-scale energy storage power station

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