CN109672198B - Method and device for controlling charging and discharging management of wind power storage combined power generation system - Google Patents

Method and device for controlling charging and discharging management of wind power storage combined power generation system Download PDF

Info

Publication number
CN109672198B
CN109672198B CN201811443416.5A CN201811443416A CN109672198B CN 109672198 B CN109672198 B CN 109672198B CN 201811443416 A CN201811443416 A CN 201811443416A CN 109672198 B CN109672198 B CN 109672198B
Authority
CN
China
Prior art keywords
ess
power
active power
point
energy storage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201811443416.5A
Other languages
Chinese (zh)
Other versions
CN109672198A (en
Inventor
李相俊
于洋
贾学翠
王上行
毛海波
杨水丽
马会萌
惠东
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Electric Power Research Institute Co Ltd CEPRI
Original Assignee
China Electric Power Research Institute Co Ltd CEPRI
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Electric Power Research Institute Co Ltd CEPRI filed Critical China Electric Power Research Institute Co Ltd CEPRI
Priority to CN201811443416.5A priority Critical patent/CN109672198B/en
Publication of CN109672198A publication Critical patent/CN109672198A/en
Application granted granted Critical
Publication of CN109672198B publication Critical patent/CN109672198B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • H02J3/386—
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • 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
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
    • 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
    • Y02E10/70—Wind energy
    • Y02E10/76—Power conversion electric or electronic aspects

Landscapes

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

Abstract

The invention discloses a method and a device for controlling charging and discharging management of a wind power storage combined power generation system, and belongs to the technical field of energy storage. The method comprises the following steps: the data acquisition module acquires rated parameters of a grid-connected boosting transformer of the wind storage combined power generation system and real-time parameters of the wind storage combined system, and sends the rated parameters and the real-time parameters to the data storage module; the data storage module stores the rated parameters and the real-time parameters transmitted by the received data acquisition module and transmits the parameters to the control module; the control module receives a charge and discharge control instruction of the dispatching center, or performs charge and discharge management on the energy storage battery according to rated parameters and real-time parameters, and sends a result to the communication module; the communication module receives the charging and discharging instruction and transmits the instruction to each energy storage unit. The invention reduces the use times of energy storage and prolongs the service life of the energy storage device. The stability, the safety and the efficiency of the wind-storage combined power generation system are improved.

Description

Method and device for controlling charging and discharging management of wind power storage combined power generation system
Technical Field
The invention relates to the technical field of energy storage, in particular to a method and a device for controlling charging and discharging management of a wind storage combined power generation system.
Background
In recent years, new energy power generation has been rapidly developed under the strong support of the country, and among them, wind power generation has been developed most rapidly. However, due to instability and fluctuation of wind power generation, output power of wind power generation is unstable, and a large amount of wind power loss and wind storage combined power generation can effectively smooth wind power output and track power generation planned output, and is now applied to practice. The new trend of the current wind power generation is that one wind power generator is provided with an energy storage unit to form a wind and storage combined power generation system. However, the grid-connected power, voltage and frequency of the power generation end may exceed the bearing range of the step-up transformer, so that the safe and stable operation of the power system is damaged, and meanwhile, in order to reduce the use of stored energy, the optimal control method and the device for the wind storage combined power generation system are provided, so that the wind storage combined power generation system is optimally controlled, and a technical support is provided for the safe and stable power generation of the wind storage combined power generation system.
Disclosure of Invention
Aiming at the problems of unstable generated power, voltage and frequency of the conventional wind-storage combined power generation system in the background art, the invention provides a method for controlling the charging and discharging management of the wind-storage combined power generation system, which comprises the following steps:
a method of controlling charge and discharge management of a wind-storage cogeneration system, the method comprising:
the data acquisition module acquires rated parameters of a grid-connected boosting transformer of the wind storage combined power generation system and real-time parameters of the wind storage combined system, and sends the rated parameters and the real-time parameters to the data storage module;
the data storage module stores the rated parameters and the real-time parameters transmitted by the received data acquisition module and transmits the parameters to the control module;
the control module receives a charge and discharge control instruction of the dispatching center, or performs charge and discharge management on the energy storage battery according to rated parameters and real-time parameters, and sends a result to the communication module;
the communication module receives the charging and discharging instruction and transmits the instruction to each energy storage unit.
Optionally, the rated parameters include: rated power, rated voltage, and rated frequency.
Optionally, the real-time parameters include: real-time power, real-time voltage, and real-time frequency.
Optionally, the charge and discharge management specifically includes:
if the wind storage combined power generation system outputs active power PpccSatisfy the constraint condition
Figure BDA0001885189160000021
Energy storage System ESS not active, Pchange＝0，
If it is
Figure BDA0001885189160000022
Active power absorbed by the ESS is
Figure BDA0001885189160000023
If it is
Figure BDA0001885189160000024
Active power from ESS is
Figure BDA0001885189160000025
When the active power in the ESS is
PRE1＝PRE+Pchange (3)
Reactive power of
Figure BDA0001885189160000026
If the wind storage combined power generation system outputs reactive power QpccSatisfy the constraint condition
Figure BDA0001885189160000027
Energy storage System ESS Inactive, Qchange＝0，
If it is
Figure BDA0001885189160000028
Reactive power absorbed by the ESS is
Figure BDA0001885189160000029
Figure BDA0001885189160000031
If it is
Figure BDA0001885189160000032
Reactive power from ESS
Figure BDA0001885189160000033
When the reactive power in the ESS is
QRE2＝QRE1+Qchange (7)
Active power is
Figure BDA0001885189160000034
If the output voltage of the wind storage combined power generation system meets the constraint condition
Figure BDA0001885189160000035
ESS is not active, Qchange＝0。
If it is
Figure BDA0001885189160000036
Will result in an increase of the output reactive power, when the excess reactive power is absorbed by the ESS as
Figure BDA0001885189160000037
If it is
Figure BDA0001885189160000038
Will be provided withResulting in a reduction of the output reactive power, which is now emitted by the ESS.
Figure BDA0001885189160000039
When the reactive power in the ESS is
QRE3＝QRE2+Qchange (11)
Active power is
Figure BDA00018851891600000310
If the output frequency of the wind storage combined power generation system meets the constraint condition
Figure BDA0001885189160000041
ESS is not active, Pchange＝0。
If it is
Figure BDA0001885189160000042
Will result in an increase of the output active power, when the active power absorbed by the ESS is
Figure BDA0001885189160000043
If it is
Figure BDA0001885189160000044
Will result in a reduction of the output active power, when the active power is emitted by the ESS as
Figure BDA0001885189160000045
When the active power in the ESS is
PRE4＝PRE3+Pchange (15)
Reactive power of
Figure BDA0001885189160000046
PpccIs the active power of the point of common coupling,
Figure BDA0001885189160000047
is the minimum value of the active power of the point of common coupling,
Figure BDA0001885189160000048
maximum value of active power, Q, for point of common connectionpccIs the reactive power of the point of common connection,
Figure BDA0001885189160000049
is the minimum value of reactive power at the point of common connection,
Figure BDA00018851891600000410
maximum value of reactive power, Q, for point of common connectionpccReactive power, V, for point of common connectionpccIs the voltage at the point of common connection,
Figure BDA00018851891600000411
is the minimum value of the voltage at the point of common connection,
Figure BDA00018851891600000412
is the maximum value of the voltage of the common connection point, fpccIs the frequency of the point of common connection,
Figure BDA00018851891600000413
is the minimum value of the frequency of the point of common coupling,
Figure BDA00018851891600000414
is the maximum value of the frequency of the point of common connection.
Figure BDA00018851891600000415
The active power which should be output at the upper limit of the voltage,
Figure BDA00018851891600000416
the active power which should be output when the frequency is lower.
Figure BDA00018851891600000417
The active power which should be output when the frequency is at the upper limit,
Figure BDA00018851891600000418
the active power which should be output when the frequency is lower. Pchange，QchangeRespectively the variation of active power and reactive power in the energy storage system,
Figure BDA00018851891600000419
apparent power of the energy storage system, PREFor initial active power of the energy storage system, PRE1，PRE2，PRE3，PRE4Respectively being active power, QRE1，QRE2，QRE3，QRE4Respectively are reactive power;
the method comprises the steps that whether active power, reactive power, voltage and frequency output by the wind storage combined power generation system meet constraint conditions or not is judged in advance, when the constraint conditions are met, an EMU control module of the energy management device outputs a control command to a communication module, and an energy storage unit conducts power allocation.
The invention also provides a device for controlling the charging and discharging management of the wind storage combined power generation system, and the system comprises:
the data acquisition module is used for acquiring rated parameters of the grid-connected boosting transformer of the wind storage combined power generation system and real-time parameters of the wind storage combined system and sending the rated parameters and the real-time parameters to the data storage module;
the data storage module is used for storing the rated parameters and the real-time parameters transmitted by the received data acquisition module and transmitting the parameters to the control module;
the control module receives a charge and discharge control instruction of the dispatching center, or performs charge and discharge management on the energy storage battery according to rated parameters and real-time parameters, and sends a result to the communication module; the communication module receives a charging and discharging instruction and transmits the instruction to the energy storage battery;
and the communication module receives the charge and discharge instruction and transmits the charge and discharge instruction to each energy storage unit.
Optionally, the control module performs a charging and discharging management process on the energy storage system, including: if the wind storage combined power generation system outputs active power PpccSatisfy the constraint condition
Figure BDA0001885189160000051
Energy storage System ESS not active, Pchange＝0，
If it is
Figure BDA0001885189160000052
Active power absorbed by the ESS is
Figure BDA0001885189160000053
If it is
Figure BDA0001885189160000054
Active power from ESS is
Figure BDA0001885189160000055
When the active power in the ESS is
PRE1＝PRE+Pchange
Reactive power of
Figure BDA0001885189160000056
If the wind storage combined power generation system outputs reactive power QpccSatisfy the constraint condition
Figure BDA0001885189160000061
Energy storage System ESS Inactive, Qchange＝0，
If it is
Figure BDA0001885189160000062
Reactive power absorbed by the ESS is
Figure BDA0001885189160000063
If it is
Figure BDA0001885189160000064
Reactive power from ESS
Figure BDA0001885189160000065
When the reactive power in the ESS is
QRE2＝QRE1+Qchange
Active power is
Figure BDA0001885189160000066
If the output voltage of the wind storage combined power generation system meets the constraint condition
Figure BDA0001885189160000067
ESS is not active, Qchange＝0。
If it is
Figure BDA0001885189160000068
Will result in an increase of the output reactive power, when the excess reactive power is absorbed by the ESS as
Figure BDA0001885189160000069
If it is
Figure BDA00018851891600000610
Will result in transfusionA reduction of reactive power occurs, at which time reactive power is emitted by the ESS.
Figure BDA00018851891600000611
When the reactive power in the ESS is
QRE3＝QRE2+Qchange
Active power is
Figure BDA0001885189160000071
If the output frequency of the wind storage combined power generation system meets the constraint condition
Figure BDA0001885189160000072
ESS is not active, Pchange＝0。
If it is
Figure BDA0001885189160000073
Will result in an increase of the output active power, when the active power absorbed by the ESS is
Figure BDA0001885189160000074
If it is
Figure BDA0001885189160000075
Will result in a reduction of the output active power, when the active power is emitted by the ESS as
Figure BDA0001885189160000076
When the active power in the ESS is
PRE4＝PRE3+Pchange
Reactive power of
Figure BDA0001885189160000077
When the difference value exists between the acquired actual value of the voltage of the common connection point pc and the rated range of the voltage of the common connection point pc, obtaining delta U according to the difference value between the acquired actual value of the voltage of the common connection point pc and the rated range of the voltage of the common connection point pc, and obtaining delta Q through Q/V droop control;
when the difference value exists between the collected actual value of the frequency of the common connection point pc and the rated range of the frequency of the common connection point pc, delta f is obtained according to the difference value between the collected actual value of the frequency of the common connection point pc and the rated range of the frequency of the common connection point pc, and delta P is obtained through P/f droop control.
The invention is superior to the existing control method and device for wind-storage combined power generation, can control the power, voltage and frequency of the wind-storage combined power generation end within the allowable range of the common connection point, enables the step-up transformer to work within the rated range, reduces the use frequency of stored energy and prolongs the service life of the step-up transformer. The stability, the safety and the efficiency of the wind-storage combined power generation system are improved.
Drawings
Fig. 1 is an electrical connection diagram and an energy storage unit communication network diagram of an energy management device EMU accessing a wind driven generator box transformer substation according to a method for controlling charging and discharging management of a wind power and storage combined power generation system;
FIG. 2 is a flow chart of a method for controlling charging and discharging management of a wind power generation and storage combined power generation system according to the present invention;
FIG. 3 is a structural diagram of a device for controlling charging and discharging management of a wind storage combined power generation system according to the present invention;
FIG. 4 is a Q/V droop characteristic control curve diagram of a method for controlling charge and discharge management of a wind power storage combined power generation system according to the invention;
fig. 5 is a P/f droop characteristic control curve diagram of a method for controlling charge and discharge management of a wind power storage combined power generation system.
Detailed Description
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including 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. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
The invention provides a method for controlling charging and discharging management of a wind power storage combined power generation system, which comprises the following steps of:
the data acquisition module acquires rated parameters of a grid-connected boosting transformer of the wind storage combined power generation system and real-time parameters of the wind storage combined system, and sends the rated parameters and the real-time parameters to the data storage module;
the data storage module stores the rated parameters and the real-time parameters transmitted by the received data acquisition module and transmits the parameters to the control module;
the control module receives a charge and discharge control instruction of the dispatching center, or performs charge and discharge management on the energy storage battery according to rated parameters and real-time parameters, and sends a result to the communication module;
the communication module receives the charging and discharging instruction and transmits the instruction to each energy storage unit.
The figure 1 shows that an energy management device EMU is connected with an electrical connection diagram and an energy storage unit communication network diagram of a wind driven generator box transformer substation;
the rated parameters include: rated power, rated voltage, and rated frequency.
The real-time parameters include: real-time power, real-time voltage, and real-time frequency.
The charge and discharge management specifically comprises:
if the wind storage combined power generation system outputs active power PpccSatisfy the constraint condition
Figure BDA0001885189160000091
Energy storage System ESS not active, Pchange＝0，
If it is
Figure BDA0001885189160000092
Active power absorbed by the ESS is
Figure BDA0001885189160000093
If it is
Figure BDA0001885189160000094
Active power from ESS is
Figure BDA0001885189160000095
When the active power in the ESS is
PRE1＝PRE+Pchange (3)
Reactive power of
Figure BDA0001885189160000096
If the wind storage combined power generation system outputs reactive power QpccSatisfy the constraint condition
Figure BDA0001885189160000097
Energy storage System ESS Inactive, Qchange＝0，
If it is
Figure BDA0001885189160000101
Reactive power absorbed by the ESS is
Figure BDA0001885189160000102
If it is
Figure BDA0001885189160000103
Reactive power from ESS
Figure BDA0001885189160000104
When the reactive power in the ESS is
QRE2＝QRE1+Qchange (7)
Active power is
Figure BDA0001885189160000105
If the output voltage of the wind storage combined power generation system meets the constraint condition
Figure BDA0001885189160000106
ESS is not active, Qchange＝0。
If it is
Figure BDA0001885189160000107
Will result in an increase of the output reactive power, when the excess reactive power is absorbed by the ESS as
Figure BDA0001885189160000108
If it is
Figure BDA0001885189160000109
This will result in a reduction of the output reactive power, which is now emitted by the ESS.
Figure BDA00018851891600001010
When the reactive power in the ESS is
QRE3＝QRE2+Qchange (11)
Active power is
Figure BDA0001885189160000111
If the output frequency of the wind storage combined power generation system meets the constraint condition
Figure BDA0001885189160000112
ESS is not active, Pchange＝0。
If it is
Figure BDA0001885189160000113
Will result in an increase of the output active power, when the active power absorbed by the ESS is
Figure BDA0001885189160000114
If it is
Figure BDA0001885189160000115
Will result in a reduction of the output active power, when the active power is emitted by the ESS as
Figure BDA0001885189160000116
When the active power in the ESS is
PRE4＝PRE3+Pchange (15)
Reactive power of
Figure BDA0001885189160000117
PpccIs the active power of the point of common coupling,
Figure BDA0001885189160000118
is the minimum value of the active power of the point of common coupling,
Figure BDA0001885189160000119
maximum value of active power, Q, for point of common connectionpccIs the reactive power of the point of common connection,
Figure BDA00018851891600001110
is the minimum value of reactive power at the point of common connection,
Figure BDA00018851891600001111
maximum value of reactive power, Q, for point of common connectionpccReactive power, V, for point of common connectionpccIs the voltage at the point of common connection,
Figure BDA00018851891600001112
is the minimum value of the voltage at the point of common connection,
Figure BDA00018851891600001113
is the maximum value of the voltage of the common connection point, fpccIs the frequency of the point of common connection,
Figure BDA00018851891600001114
is the minimum value of the frequency of the point of common coupling,
Figure BDA00018851891600001115
is the maximum value of the frequency of the point of common connection.
Figure BDA00018851891600001116
The active power which should be output at the upper limit of the voltage,
Figure BDA00018851891600001117
the active power which should be output when the frequency is lower.
Figure BDA00018851891600001118
The active power which should be output when the frequency is at the upper limit,
Figure BDA00018851891600001119
the active power which should be output when the frequency is lower. Pchange，QchangeRespectively the variation of active power and reactive power in the energy storage system,
Figure BDA00018851891600001120
apparent power of the energy storage system, PREFor initial active power of the energy storage system, PRE1，PRE2，PRE3，PRE4Respectively being active power, QRE1，QRE2，QRE3，QRE4Respectively are reactive power;
the method comprises the steps that whether active power, reactive power, voltage and frequency output by the wind storage combined power generation system meet constraint conditions or not is judged in advance, when the constraint conditions are met, an EMU control module of the energy management device outputs a control command to a communication module, and an energy storage unit conducts power allocation.
The present invention also provides a device for controlling charging and discharging management of a wind power storage combined power generation system, as shown in fig. 3, including:
the data acquisition module is used for acquiring rated parameters of the grid-connected boosting transformer of the wind storage combined power generation system and real-time parameters of the wind storage combined system and sending the rated parameters and the real-time parameters to the data storage module;
the data storage module is used for storing the rated parameters and the real-time parameters transmitted by the received data acquisition module and transmitting the parameters to the control module;
the control module receives a charge and discharge control instruction of the dispatching center, or performs charge and discharge management on the energy storage battery according to rated parameters and real-time parameters, and sends a result to the communication module; the communication module receives a charging and discharging instruction and transmits the instruction to the energy storage battery;
and the communication module receives the charge and discharge instruction and transmits the charge and discharge instruction to each energy storage unit.
Charging and discharging management is carried out on an energy storage system by a control module of an energy storage management device EMUThe process comprises the following steps: if the wind storage combined power generation system outputs active power PpccSatisfy the constraint condition
Figure BDA0001885189160000121
Energy storage System ESS not active, Pchange＝0，
If it is
Figure BDA0001885189160000122
Active power absorbed by the ESS is
Figure BDA0001885189160000123
If it is
Figure BDA0001885189160000124
Active power from ESS is
Figure BDA0001885189160000125
When the active power in the ESS is
PRE1＝PRE+Pchange
Reactive power of
Figure BDA0001885189160000131
If the wind storage combined power generation system outputs reactive power QpccSatisfy the constraint condition
Figure BDA0001885189160000132
Energy storage System ESS Inactive, Qchange＝0，
If it is
Figure BDA0001885189160000133
Reactive power absorbed by the ESS is
Figure BDA0001885189160000134
If it is
Figure BDA0001885189160000135
Reactive power from ESS
Figure BDA0001885189160000136
When the reactive power in the ESS is
QRE2＝QRE1+Qchange
Active power is
Figure BDA0001885189160000137
If the output voltage of the wind storage combined power generation system meets the constraint condition
Figure BDA0001885189160000138
ESS is not active, Qchange＝0。
If it is
Figure BDA0001885189160000139
Will result in an increase of the output reactive power, when the excess reactive power is absorbed by the ESS as
Figure BDA00018851891600001310
If it is
Figure BDA00018851891600001311
This will result in a reduction of the output reactive power, which is now emitted by the ESS.
Figure BDA00018851891600001312
When the reactive power in the ESS is
QRE3＝QRE2+Qchange
Active power is
Figure BDA0001885189160000141
If the output frequency of the wind storage combined power generation system meets the constraint condition
Figure BDA0001885189160000142
ESS is not active, Pchange＝0。
If it is
Figure BDA0001885189160000143
Will result in an increase of the output active power, when the active power absorbed by the ESS is
Figure BDA0001885189160000144
If it is
Figure BDA0001885189160000145
Will result in a reduction of the output active power, when the active power is emitted by the ESS as
Figure BDA0001885189160000146
When the active power in the ESS is
PRE4＝PRE3+Pchange
Reactive power of
Figure BDA0001885189160000147
When the difference value exists between the acquired actual value of the voltage of the common connection point pc and the rated range of the voltage of the common connection point pc, obtaining delta U according to the difference value between the acquired actual value of the voltage of the common connection point pc and the rated range of the voltage of the common connection point pc, and obtaining delta Q through Q/V droop control, wherein a Q/V droop characteristic control curve chart is shown in FIG. 4;
when the difference exists between the collected actual value of the frequency of the common connection point pc and the rated range of the frequency of the common connection point pc, Δ f is obtained according to the difference between the collected actual value of the frequency of the common connection point pc and the rated range of the frequency of the common connection point pc, Δ P is obtained through P/f droop control, and a P/f droop characteristic control curve graph is shown in fig. 5.
The invention is superior to the existing control method and system for wind-storage combined power generation, can control the power, voltage and frequency of the wind-storage combined power generation end within the allowable range of the common connection point, enables the step-up transformer to work within the rated range, reduces the use frequency of stored energy and prolongs the service life of the step-up transformer. The stability, the safety and the efficiency of the wind-storage combined power generation system are improved.

Claims (4)

1. A method of controlling charge and discharge management of a wind-storage cogeneration system, the method comprising:
the data acquisition module acquires rated parameters of a grid-connected boosting transformer of the wind storage combined power generation system and real-time parameters of the wind storage combined system, and sends the rated parameters and the real-time parameters to the data storage module;
the data storage module stores the rated parameters and the real-time parameters transmitted by the received data acquisition module and transmits the parameters to the control module;
the control module receives a charge and discharge control instruction of the dispatching center, or performs charge and discharge management on the energy storage battery according to rated parameters and real-time parameters, and sends a result to the communication module;
the charge and discharge management specifically comprises:
if the wind storage combined power generation system outputs active power PpccSatisfy the constraint condition
Figure FDA0003137973040000011
Energy storage System ESS not active, Pchange＝0，
If it is
Figure FDA0003137973040000012
Active power absorbed by the ESS is
Figure FDA0003137973040000013
If it is
Figure FDA0003137973040000014
Active power from ESS is
Figure FDA0003137973040000015
When the active power in the ESS is
PRE1＝PRE+Pchange (3)
Reactive power of
Figure FDA0003137973040000016
If the wind storage combined power generation system outputs reactive power QpccSatisfy the constraint condition
Figure FDA0003137973040000017
Energy storage System ESS Inactive, Qchange＝0，
If it is
Figure FDA0003137973040000021
Reactive power absorbed by the ESS is
Figure FDA0003137973040000022
If it is
Figure FDA0003137973040000023
Reactive power from ESS
Figure FDA0003137973040000024
Wherein the content of the first and second substances,
Figure FDA0003137973040000025
for the maximum active power of the energy storage system ESS,
Figure FDA0003137973040000026
for the minimum active power of the energy storage system ESS,
Figure FDA0003137973040000027
for the maximum reactive power of the energy storage system ESS,
Figure FDA0003137973040000028
the minimum reactive power of the energy storage system ESS;
when the reactive power in the ESS is
QRE2＝QRE1+Qchange (7)
Active power is
Figure FDA0003137973040000029
If the output voltage of the wind storage combined power generation system meets the constraint condition
Figure FDA00031379730400000210
ESS is not active, Qchange＝0，
If it is
Figure FDA00031379730400000211
Will result in an increase of the output reactive power, when the excess reactive power is absorbed by the ESS as
Figure FDA00031379730400000212
If it is
Figure FDA00031379730400000213
This will result in a reduction of the output reactive power, which is now emitted by the ESS,
Figure FDA00031379730400000214
when the reactive power in the ESS is
QRE3＝QRE2+Qchange (11)
Active power is
Figure FDA0003137973040000031
If the output frequency of the wind storage combined power generation system meets the constraint condition
Figure FDA0003137973040000032
ESS is not active, Pchange＝0，
If it is
Figure FDA0003137973040000033
Will result in an increase of the output active power, when the active power absorbed by the ESS is
Figure FDA0003137973040000034
If it is
Figure FDA0003137973040000035
Will result in a reduction of the output active power, when the active power is emitted by the ESS as
Figure FDA0003137973040000036
When the active power in the ESS is
PRE4＝PRE3+Pchange (15)
Reactive power of
Figure FDA0003137973040000037
PpccIs the active power of the point of common coupling,
Figure FDA0003137973040000038
is the minimum value of the active power of the point of common coupling,
Figure FDA0003137973040000039
maximum value of active power, Q, for point of common connectionpccIs the reactive power of the point of common connection,
Figure FDA00031379730400000310
is the minimum value of reactive power at the point of common connection,
Figure FDA00031379730400000311
maximum value of reactive power, Q, for point of common connectionpccReactive power for point of common connection, UpccIs the voltage at the point of common connection,
Figure FDA00031379730400000312
is the minimum value of the voltage at the point of common connection,
Figure FDA00031379730400000313
is the maximum value of the voltage of the common connection point, fpccIs the frequency of the point of common connection,
Figure FDA00031379730400000314
is the minimum value of the frequency of the point of common coupling,
Figure FDA00031379730400000315
is the maximum value of the frequency of the point of common coupling,
Figure FDA00031379730400000316
the active power which should be output at the upper limit of the voltage,
Figure FDA00031379730400000317
the active power which should be output when the frequency is lower,
Figure FDA0003137973040000041
the active power which should be output when the frequency is at the upper limit,
Figure FDA0003137973040000042
active power to be output at the lower frequency limit, Pchange，QchangeRespectively the variation of active power and reactive power in the energy storage system,
Figure FDA0003137973040000043
apparent power of the energy storage system, PREFor initial active power of the energy storage system, PRE1，PRE2，PRE3，PRE4Respectively being active power, QRE1，QRE2，QRE3，QRE4Respectively are reactive power;
the method comprises the steps that whether the active power, the reactive power, the voltage and the frequency output by a wind storage combined power generation system meet constraint conditions or not is judged in advance, when the constraint conditions are met, an EMU control module of an energy management device outputs a control command to a communication module, and an energy storage unit performs power allocation;
the communication module receives the charging and discharging instruction and transmits the instruction to each energy storage unit.
2. The method of claim 1, wherein said nominal parameters comprise: rated power, rated voltage, and rated frequency.
3. The method of claim 1, wherein the real-time parameters comprise: real-time power, real-time voltage, and real-time frequency.
4. An apparatus for controlling charge and discharge management of a wind storage combined power generation system, the apparatus comprising:
the data acquisition module is used for acquiring rated parameters of the grid-connected boosting transformer of the wind storage combined power generation system and real-time parameters of the wind storage combined system and sending the rated parameters and the real-time parameters to the data storage module;
the data storage module is used for storing the rated parameters and the real-time parameters transmitted by the received data acquisition module and transmitting the parameters to the control module;
the control module receives a charge and discharge control instruction of the dispatching center, or performs charge and discharge management on the energy storage battery according to rated parameters and real-time parameters, and sends a result to the communication module; the communication module receives a charging and discharging instruction and transmits the instruction to each energy storage unit;
the control module carries out charge-discharge management process to energy storage system, includes:
if the wind storage combined power generation system outputs active power PpccSatisfy the constraint condition
Figure FDA0003137973040000044
Energy storage System ESS not active, Pchange＝0，
If it is
Figure FDA0003137973040000045
Active power absorbed by the ESS is
Figure FDA0003137973040000046
If it is
Figure FDA0003137973040000051
Active power from ESS is
Figure FDA0003137973040000052
When the active power in the ESS is
PRE1＝PRE+Pchange (3)
Reactive power of
Figure FDA0003137973040000053
If the wind storage combined power generation system outputs reactive power QpccSatisfy the constraint condition
Figure FDA0003137973040000054
Energy storage System ESS Inactive, Qchange＝0，
If it is
Figure FDA0003137973040000055
Reactive power absorbed by the ESS is
Figure FDA0003137973040000056
If it is
Figure FDA0003137973040000057
Reactive power from ESS
Figure FDA0003137973040000058
Wherein the content of the first and second substances,
Figure FDA0003137973040000059
for the maximum active power of the energy storage system ESS,
Figure FDA00031379730400000510
for the minimum active power of the energy storage system ESS,
Figure FDA00031379730400000511
for the maximum reactive power of the energy storage system ESS,
Figure FDA00031379730400000512
the minimum reactive power of the energy storage system ESS;
when the reactive power in the ESS is
QRE2＝QRE1+Qchange (7)
Active power is
Figure FDA00031379730400000513
If the output voltage of the wind storage combined power generation system meets the constraint condition
Figure FDA0003137973040000061
ESS is not active, Qchange＝0，
If it is
Figure FDA0003137973040000062
Will result in an increase of the output reactive power, when the excess reactive power is absorbed by the ESS as
Figure FDA0003137973040000063
If it is
Figure FDA0003137973040000064
This will result in a reduction of the output reactive power, which is now emitted by the ESS,
Figure FDA0003137973040000065
when the reactive power in the ESS is
QRE3＝QRE2+Qchange (11)
Active power is
Figure FDA0003137973040000066
If the output frequency of the wind storage combined power generation system meets the constraint condition
Figure FDA0003137973040000067
ESS is not active, Pchange＝0，
If it is
Figure FDA0003137973040000068
Will result in an increase of the output active power, when the active power absorbed by the ESS is
Figure FDA0003137973040000069
If it is
Figure FDA00031379730400000610
Will result in a reduction of the output active power, when the active power is emitted by the ESS as
Figure FDA00031379730400000611
When the active power in the ESS is
PRE4＝PRE3+Pchange (15)
Reactive power of
Figure FDA0003137973040000071
PpccIs the active power of the point of common coupling,
Figure FDA0003137973040000072
is the minimum value of the active power of the point of common coupling,
Figure FDA0003137973040000073
maximum value of active power, Q, for point of common connectionpccIs the reactive power of the point of common connection,
Figure FDA0003137973040000074
is the minimum value of reactive power at the point of common connection,
Figure FDA0003137973040000075
maximum value of reactive power, Q, for point of common connectionpccReactive power for point of common connection, UpccIs the voltage at the point of common connection,
Figure FDA0003137973040000076
is the minimum value of the voltage at the point of common connection,
Figure FDA0003137973040000077
is the maximum value of the voltage of the common connection point, fpccIs the frequency of the point of common connection,
Figure FDA0003137973040000078
is the minimum value of the frequency of the point of common coupling,
Figure FDA0003137973040000079
is the maximum value of the frequency of the point of common coupling,
Figure FDA00031379730400000710
the active power which should be output at the upper limit of the voltage,
Figure FDA00031379730400000711
the active power which should be output when the frequency is lower,
Figure FDA00031379730400000712
the active power which should be output when the frequency is at the upper limit,
Figure FDA00031379730400000713
active power to be output at the lower frequency limit, Pchange，QchangeRespectively the variation of active power and reactive power in the energy storage system,
Figure FDA00031379730400000714
apparent power of the energy storage system, PREFor initial active power of the energy storage system, PRE1，PRE2，PRE3，PRE4Respectively being active power, QRE1，QRE2，QRE3，QRE4Respectively are reactive power;
when the difference value exists between the acquired actual value of the voltage of the common connection point pc and the rated range of the voltage of the common connection point pc, obtaining delta U according to the difference value between the acquired actual value of the voltage of the common connection point pc and the rated range of the voltage of the common connection point pc, and obtaining delta Q through Q/V droop control;
when the difference value exists between the collected actual value of the frequency of the common connection point pc and the rated range of the frequency of the common connection point pc, obtaining delta f according to the difference value between the collected actual value of the frequency of the common connection point pc and the rated range of the frequency of the common connection point pc, and obtaining delta P through P/f droop control;
and the communication module receives the charge and discharge instruction and transmits the charge and discharge instruction to the energy storage battery.
CN201811443416.5A 2018-11-29 2018-11-29 Method and device for controlling charging and discharging management of wind power storage combined power generation system Active CN109672198B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811443416.5A CN109672198B (en) 2018-11-29 2018-11-29 Method and device for controlling charging and discharging management of wind power storage combined power generation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811443416.5A CN109672198B (en) 2018-11-29 2018-11-29 Method and device for controlling charging and discharging management of wind power storage combined power generation system

Publications (2)

Publication Number Publication Date
CN109672198A CN109672198A (en) 2019-04-23
CN109672198B true CN109672198B (en) 2021-10-22

Family

ID=66144991

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811443416.5A Active CN109672198B (en) 2018-11-29 2018-11-29 Method and device for controlling charging and discharging management of wind power storage combined power generation system

Country Status (1)

Country Link
CN (1) CN109672198B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114188939A (en) * 2021-11-29 2022-03-15 深圳供电局有限公司 Method for regulating and controlling power distribution network

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017184299A (en) * 2016-03-28 2017-10-05 株式会社明電舎 Instantaneous voltage drop compensator
CN107294124A (en) * 2017-07-17 2017-10-24 中国科学院电工研究所 A kind of New Virtual synchronous generator control method suitable for energy-storage system
CN107887928A (en) * 2017-11-27 2018-04-06 广州智光电气股份有限公司 The control method and device of a kind of energy-storage system
CN108365627A (en) * 2018-03-09 2018-08-03 沈阳工程学院 A kind of wind storage isolated network power supply system control method for coordinating based on flexible coordinating factor
CN108448651A (en) * 2018-03-30 2018-08-24 北京天润新能投资有限公司 A kind of the wind storage association system and control method of distributing wind-powered electricity generation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017184299A (en) * 2016-03-28 2017-10-05 株式会社明電舎 Instantaneous voltage drop compensator
CN107294124A (en) * 2017-07-17 2017-10-24 中国科学院电工研究所 A kind of New Virtual synchronous generator control method suitable for energy-storage system
CN107887928A (en) * 2017-11-27 2018-04-06 广州智光电气股份有限公司 The control method and device of a kind of energy-storage system
CN108365627A (en) * 2018-03-09 2018-08-03 沈阳工程学院 A kind of wind storage isolated network power supply system control method for coordinating based on flexible coordinating factor
CN108448651A (en) * 2018-03-30 2018-08-24 北京天润新能投资有限公司 A kind of the wind storage association system and control method of distributing wind-powered electricity generation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
多能源互补独立电力系统的控制策略仿真研究;杨秀媛等;《中国电机工程学报》;20130205;第33卷(第4期);第156-161页 *

Also Published As

Publication number Publication date
CN109672198A (en) 2019-04-23

Similar Documents

Publication Publication Date Title
US8744635B2 (en) Power production control method based on power production rate requirement
EP3206276B1 (en) Energy storage system and management method thereof
CN102214934B (en) Smooth wind-optical generated output control method based on megawatt-grade battery energy-storage power station
CN102163849B (en) Wind power output adaptive smoothing method based on energy storage battery charge state feedback
CN102522763A (en) Control method for stabilizing fluctuation of wind power by energy storage system
US20210111581A1 (en) Hybrid energy storage system
CN112260324B (en) Frequency modulation method for eliminating grid-connected risk of new energy by utilizing energy storage
CN107492910B (en) Self-adaptive control and main power supply switching method for off-grid micro-grid containing diesel storage
JP2015192566A (en) Power system and dc power transmission method
KR101687900B1 (en) A method for smoothing wind power fluctuation based on battery energy storage system for wind farm
US10069303B2 (en) Power generation system and method with energy management
CN110867878A (en) Control method for energy storage of flywheel energy storage hybrid lithium battery
CN110829464A (en) Photovoltaic energy storage battery frequency modulation system and method based on direct current side
CN109672198B (en) Method and device for controlling charging and discharging management of wind power storage combined power generation system
US11277008B2 (en) Energy storage system
CN106374537B (en) Control system and method for main power supply of diesel engine in independent micro-grid
CN113078733A (en) Aircraft static power supply integrating energy management
CN109842149A (en) Have both off-network, the wind generator system of grid-connected both of which and its working method
CN112366759B (en) Thermal power generating unit energy storage frequency modulation method and system
Chang et al. A dual-layer cooperative control strategy of battery energy storage units for smoothing wind power fluctuations
KR102338490B1 (en) An energy storage system possible for uninterruptible power supply
KR102463396B1 (en) Energy storage system
Lei et al. Power optimization allocation strategy for energy storage station responding to dispatch instruction
CN210608563U (en) Energy storage frequency modulation system capable of being configured flexibly
CN102347617A (en) Energy storage power station for clean energy source compensation and energy storage system with clean energy source compensation function

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant