CN208158135U - A kind of microgrid framework containing battery energy storage and generator - Google Patents
A kind of microgrid framework containing battery energy storage and generator Download PDFInfo
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- CN208158135U CN208158135U CN201820676503.4U CN201820676503U CN208158135U CN 208158135 U CN208158135 U CN 208158135U CN 201820676503 U CN201820676503 U CN 201820676503U CN 208158135 U CN208158135 U CN 208158135U
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Abstract
The utility model discloses a kind of microgrid framework containing battery energy storage and generator.The microgrid framework can be when outer grid collapses or power quality reduce, and system can rapidly enter the isolated operation of microgrid.By reducing the controllable burden inside microgrid, can be with quick start using energy storage the characteristics of, the power demand of critical load is supported.Simultaneously, start generator and more permanent power supply is provided, the system uses two-stage system, generator is connected to the DC side of the DC side of main convertor and the current transformer of battery by controllable current transformer, control system uses modularized design, ensure that the economy, timeliness and safety of system, simultaneously because disparate modules can be according to practical application scene flexible combination, it is adapted to plurality of application scenes, solves the problems, such as microgrid customization.
Description
Technical field
The utility model designs the framework and control method of a kind of microgrid, specifically a kind of to be used for while possessing battery storage
Energy, distributed photovoltaic power generation, generator micro-grid system, for adjusting the trend of microgrid, for the microgrid after outer electrical breakdown
Control when into isolated operation improves the flexibility of traditional microgrid control system and economical, while also improving tradition
The safety of microgrid control system.
Background technique
With the development of information technology, the automation of the energy is accelerated.But energy consumption is still consumed with traditional energy
Based on, such as petroleum, natural gas, coal, these non-renewable energy resources.And a large amount of renewable energy present on the earth, such as：
The energy such as solar energy, wind energy, tide energy, water energy, geothermal energy, biomass can use.The utilization of these energy is more and more
Country paid attention to, the especially utilization of distributed energy.The states such as European Union, Japan, the U.S. have also formulated long-run development rule in succession
It draws, improve the utilization efficiency of renewable energy and accounts for the ratio in energy consumption.The development plan that China also formulates, and ceiling
《People's Republic of China's Renewable Energy Law》, the strong development and utilization for promoting China's renewable energy is disclosed, for changing
Kind energy resource structure, protection environment realize that the sustainable development of social economy has positive effect.
Renewable energy utilization mode can be divided into two classes：Centralized power station and distributed power station form.Distributed power station
Refer to the distributed generation resource close to load, the renewable energy of dispersion can be made full use of, can effectively solve to concentrate power station remote
Some drawbacks apart from transmission and disttrbution.Small, power generation is flexible, control system is simple and bulk power grid using investing for distributed power generation
Connection type it is various the advantages that, application case is more and more, and there is also certain drawbacks.Such as the utilization efficiency of distributed power generation
It is lower, some column problems such as control after external power grid loses electric power.Since there are various energy resources input, various energy for micro-grid system
The connection of source and bulk power grid has but respective technical requirements, more difficult unification.And in order to control it is simple we need by
The various energy first link together, and after forming microgrid, are connect using unified node with bulk power grid.But due to microgrid apoplexy
Electricity, photovoltaic and load all have very strong randomness, cause microgrid to generate power swing, and influence the trend and electric energy of feeder line
Quality.Energy storage device can provide quick power compensation in microgrid, theoretically can provide compensation within 5 milliseconds
Voltage offsets the power swing lost on line, remains uneven in short-term between load and power supply.Largely studies have shown that microgrid
When middle generation power swing, it will lead to such as a series of problems, such as voltage fluctuation, frequency fluctuation, can effectively be solved using battery energy storage
Certainly these problems maintain power output, are conducive to the stable operation of microgrid.And when breaking down in bulk power grid, microgrid can
To detach from bulk power grid, into island operation state, system can use energy-storage battery and distributed generator, distribution
Formula power supply provides power supply for microgrid.Meanwhile when micro-capacitance sensor because lightning stroke or equipment fault lead to Voltage Drop and three-phase imbalance
When, it is desirable that system voltage can provide compensation with quick response.Eliminate voltage fluctuation and the influence with flickering to load.Therefore base
It is extremely important in microgrid in the power flowcontrol and power quality control technology of microgrid.
In recent years, more and more research institutions and researcher have carried out greatly the operation of microgrid and power quality problem
Quantifier elimination.Such as the running optimizatin of microgrid, reliability, economic Journal of Sex Research, and the power quality problem in microgrid, voltage wave
The research such as dynamic, flickering, voltage deviation, frequency departure, harmonic wave and three-phase imbalance.Currently, response has all been formulated in countries in the world
Mainly there are six national standards in standard, China.《Admissible deviation of supply volt- age standard (GB/T12325-2003)》,《Voltage fluctuation
With flickering standard (GB/T12326-2008)》,《Utility grid harmonic standard (GB/14549-1993)》,《Phase voltage degree of unbalancedness
Standard (GB/T15543-2008)》,《Power system frequency deviation standard (GB/T15945-2008)》,《Temporary overvoltage and wink
State voltage standard (GB/T18481-2001)》.
Cause the fluctuation of microgrid voltage and power quality problem because being known as the following：1, photovoltaic and wind-power electricity generation with
And other formal distribution formula power-supply fluctuations.2, the switching of distributed Voltage, such as the grid-connected and off-grid operation of photovoltaic combining inverter
Caused by impact.3, the grid-connected and excision of load, especially for the operation of single-phase load, caused serious three-phase load is not
Balance.Busbar voltage fluctuation caused by the reactive power of micro-grid system.4, the power swing of external power grid and frequency fluctuation, Yi Ji electricity
The temporary of pressure rises the temporarily influence to microgrid such as drop.In most power quality problems, wherein have about 70% to 90% or so be by
Caused by the temporary drop of voltage.In the environment of nonlinear-load and power electronic equipment are applied, voltage dip can cause this
The policy work of a little equipment, causes huge economic loss.The concern of numerous scholars is caused for the research of microgrid in recent years,
In terms of research emphasis is concentrated mainly on topological structure, energy-storage system, voltage dip monitoring and compensation method.1, topological structure and storage
It can systematic research.Topological structure can be divided into parallel connection type, tandem type and mixed type.Energy storage can be divided into：Capacitive energy storage, lithium electricity
Pond energy storage, lead carbon battery energy storage, superconducting energy storage and flywheel energy storage can also build air-source storage for some conditional areas
Energy and water storage energy storage etc..On the topology, Unified Power Quality Controller (Unified Power Quality
Conditioner) become research hotspot.UPQC be broadly divided into it is low capacity and large capacity, especially in large capacity
Multilevel converter is such as applied in UPQC by the research of UPQC.The MMC-UPQC part in series of new topology is using equivalent series
Double transformation and three single-phase coupling transformers.For improving the fluctuation of voltage, compensation ability is improved.2, Power Quality Detection is calculated
Method.In power quality problem, voltage fluctuation is very crucial problem, and it is extremely important for improving the monitoring capability of voltage fluctuation
's.It is mainly used both at home and abroad about voltage monitoring algorithm：Virtual value, crest voltage method, d-q converter technique, FFT method, wavelet transformation
Method, Hilbert converter technique, symmetrical component method, LES filtering algorithm etc..3, the research of Compensation Control.It is main to use three kinds
Method：Complete compensation method, same-phase compensation method and minimizing energy method.
From the point of view of present Research both domestic and external, for meet microgrid power quality and trend requirement, provide with rapidity,
The requirement of accuracy and economy, further investigation and improvement to topological structure can be effectively improved control characteristic.Using new
The advantage that topological structure has more economical, performance more superior etc. relative to traditional circuit structure.With technology
Development, there are various energy storage technologies.Energy storage largely solves distributed power generation in microgrid application
The smooth output of generation of electricity by new energy may be implemented in randomness and fluctuation, improves power quality, provides the reliable of the operation of microgrid
Property and economic benefit.But the development of microgrid puts forward higher requirements energy storage, and one has been recruited in performance and price
Suitable equalization point is difficult, and there are also very big development spaces for the research of various energy storage methods.For compensation and control strategy
Aspect, system still have the characteristic that cannot be considered in terms of.Single control method can not also meet rapidity, stability and general simultaneously
The advantages of property.The advantages of various methods, is combined together by compound control algolithm.Control is more complicated due to meeting, in reality
The also more difficult use in, application method also only rest in the emulation of software.In practical applications, it is also contemplated that quickly detection
Method and existing method combine, and improve Actual Control Effect of Strong.
There are wind-powered electricity generations, photovoltaic power generation distributed power supply in microgrid influences microgrid fortune due to the fluctuation of distributed generation resource
Row stability.It also will appear biggish power quality problem in micro-grid connection and off-network handoff procedure, in this case
By the compensation of the battery energy storage system quickly supported with regard to particularly important.The system of basic energy storage, due to the capacity of energy-storage system
Problem, traditional generator is also particularly important as power compensation, piconet island fortune is provided in conjunction with generator by energy storage
The energy supply of row state improves microgrid operation stability, improves micro net power quality.And structure is complicated in microgrid, energy
Flow two-way, its own power quality is difficult to the problem of administering.
Utility model content
The utility model is directed to the problem of background technique, proposes a kind of micro- containing battery energy storage and generator
Planar network architecture, it includes：
One end of the total access switch S-m of output end connection of power supply S, power supply S；Power supply S is AC system power supply；
Total access switch S-m, total other end for accessing switch S-m connect multiple branches：
The first branch：Total access switch S-m loads load-1, the first load by the first breaker S-L1 connection first
Load-1 is important load；
Second branch：Total access switch S-m loads load-2, the second load by the second breaker S-L2 connection second
Load-2 is general load；
Third branch：One end of total access switch S-m connection AC/DC main module；
The other end of-AC/DC main module, that is, main convertor, AC/DC main module connects multiple branches：
4th branch：AC/DC main module sequentially passes through DC/AC module i.e. controllable current transformer, the S-G1 connection of third breaker
Generator G-1；DC/AC module connects the DC side of generator and main module, the convert alternating current which issues generator
Main module acceptable direct current, while can guarantee the power quality of the energy that generates electricity of generator；
5th branch：AC/DC main module sequentially passes through DC/DC module i.e. current transformer, the 4th breaker S-B connection battery system
Unite B；DC/DC module connects the DC side of battery and main module, and the charging and discharging to battery can be controlled by the module, or
Person is in standby shape body, which can balance the voltage between direct current；
Microgrid energy management system EMS, the EMS are separately connected load control system LMS, generator control system
GMS-1, DC/AC module control system CMS-1, battery management system BMS, DC/DC module control system CMS-2, AC/DC master
Module control system CMS-M,
Load control system LMS is responsible for receiving control command and the execution of EMS, while monitoring the first load load-1 and the
The operating status of two load load-2 is fed back to EMS；
Generator control system GMS-1 is responsible for receiving the control command of EMS, and is converted into what generator G-1 can receive
Order；S-G1 is controlled simultaneously, and the working condition of S-G1 is fed back into EMS；
DC/AC module control system CMS-1 is responsible for receiving the control command of EMS, converts DC/AC module for control command
Control signal, while the working condition of DC/AC module is fed back into EMS；
Battery management system BMS is responsible for receiving the control command of EMS, and is converted into the order that battery system B can receive,
The working condition of battery system B is fed back into EMS simultaneously；
DC/DC module control system CMS-2 is responsible for receiving the control command of EMS, converts DC/DC module for control command
Control signal, while the working condition of DC/DC module is fed back into EMS；
AC/DC main module control system CMS-M is responsible for receiving the control command of EMS, and control command is converted to AC/DC
The control signal of main module, while the working condition of AC/DC main module is fed back into EMS.
Preferably, the power supply S is three-phase three-phase system or three-phase four-wire system power supply.
Preferably, total access switch S-m is contactless quick-speed turning on-off power switch；The first breaker S-L1
It is power switch with the second breaker S-L2；The third breaker S-G1 be AC circuit breaker, be responsible for connection DC/AC module and
Generator G-1 is quickly cut when the control command that DC/AC module and generator G-1 can not work normally or received EMS is known
The connection of disconnected DC/AC module and generator G-1；4th breaker S-B is dc circuit breaker, is responsible for connection DC/DC module and electricity
Cell system B disconnects DC/DC mould when battery system B or DC/DC module breaks down or receive the control command of EMS
The connection of block and battery system B.
Preferably, the AC/DC main module is become using the power of traditional H bridge type three-phase three-wire system or three-phase four-wire system
Flow device.
Preferably, the generator G-1 includes single-phase or threephase generator.
Preferably, DC/AC module control system CMS-1, DC/DC module control system CMS-2, AC/DC main module
The structure of control system CMS-M is identical.
Further, a set of effective solution method is provided from microgrid topological structure and control strategy, for microgrid tide
Flow control and power quality technical problem provide a kind of united control strategy by standard module.It includes the following steps：
S1, determine that microgrid normal operation starts；
S2, the operational mode that user just sets is read：Step S3A-1 is transferred to if user setting is island operation state；It is no
Then it is transferred to step S3B-1；
S3A-1, total access switch S-m, the second breaker S-L2 are disconnected, control battery system B discharges；
Whether S3A-2, detection battery system B capacity are lower than setting value：Lower than being then transferred to step S4；It is not below, persistently examines
It surveys；
S3B-1, judge whether dispatch from foreign news agency network electric energy quality meets standard：《Admissible deviation of supply volt- age standard (GB/T12325-
2003)》,《Voltage fluctuation and flicker standard (GB/T12326-2008)》,《Utility grid harmonic standard (GB/14549-
1993)》,《Phase voltage degree of unbalancedness standard (GB/T15543-2008)》,《Power system frequency deviation standard (GB/T15945-
2008)》,《Temporary overvoltage and transient voltage standard (GB/T18481-2001)》, or be set by the user：Meet standard then to turn
Enter step S3B-2；Do not meet standard and is then transferred to step S3A-1；
The power demand of S3B-2, calculated load are preferably calculated using instantaneous reactive power；
Whether S3B-3, the maximum demand for judging load are more than setting value：More than being then transferred to step S3B-4；It is less than, holds
It is continuous to calculate judgement；
S3B-4, stop battery system B charging；
Whether S3B-5, the maximum demand for judging load are more than setting value：More than being then transferred to step S3B-6；It is less than, holds
It is continuous to calculate judgement；
S3B-6, the second breaker S-L2 is disconnected；
Whether S3B-7, the maximum demand for judging load are more than setting value：More than being then transferred to step S3B-8；It is less than, holds
It is continuous to calculate judgement；
Maximum demand needed for S3B-8, battery system B output load；
S3B-9, battery management system BMS is read；
Whether S3B-10, detection battery system B capacity are lower than setting value：Lower than being then transferred to step S4；It is not below and then continues
Detection；
S4, soft start generator G-1 gradually increase generator power using fixed slope curve；
S5, monitoring electrical power generators power, judge whether to suit the requirements：Step S6 is transferred to if satisfaction needs；Do not meet
It needs, return step S4 continues to increase generator power；
S6, battery system B are standby
S7, end；
Preferably, in S1, judge that the step of microgrid operates normally includes：
S1-1, micro-grid system information is read；
S1-2, parameter setting is read；
Whether S1-3, detection system are normal；
Whether S1-4, detection external power grid are normal；
Whether S1-5, detection main switch are normal；
Whether S1-6, detection AC/DC main module and CMS-M are normal；
Whether S1-7, detection DC/AC module and CMS-1 are normal；
Whether S1-8, detection generator G-1 and GMS-1 are normal；
Whether S1-9, detection DC/DC module and CMS-2 are normal；
Whether S1-10, detection battery system B are normal；
S1-11, the state for reading each switch.
Preferably, detect whether battery system B capacity is lower than setting value in S3A-2, which is battery system B capacity
50%；Detect whether battery system B capacity is lower than setting value in S3B-10, which is battery system B capacity
10%.
Detailed description of the invention
Fig. 1 is the system structure connection figure and control system relational graph of the microgrid of the utility model.
Fig. 2 is the step flow chart of the control algolithm of the utility model.
Fig. 3 is the step flow chart for judging microgrid and operating normally of the utility model.
Specific embodiment
Below with reference to embodiment, the utility model is described in further detail, but the protection scope of the utility model is not limited to
This：
In Fig. 1, power supply S is AC system power supply, can be three-phase three-phase system and is also possible to three-phase four-wire system power supply, generally
For low-voltage distribution network power supply, voltage class is that 380V is exchanged or 110 alternating voltage grades can recognize due to being dispatch from foreign news agency network source
It is standard compliant for its power quality, but if the power quality as caused by special circumstances is exceeded or power loss, system
The connection of system and external power grid S can be disconnected by disconnecting following total access switch S-m.
S-m is that total access of micro-grid system switchs, which can use contactless quick-speed turning on-off power switch.As
Power switch is responsible for quickly cutting off microgrid and external power grid when external power grid loses electric power or power quality beyond national standard
The connection of S controls microgrid in isolated operation shape body.The power switch directly receives the control of microgrid energy management system EMS,
EMS is responsible for output and gives S-m control command, and the shape body of S-m is fed back to EMS.
Load is divided into two branches according to the significance level of load, passes through load break switch respectively：First breaker S-L1
It is accessed with the second breaker S-l2.It is single-phase load, phase three-wire three load or three-phase four-wire system according to the load condition at scene
Load, and can be divided into according to the loading condition flexible configuration at scene according to the significance level of load：First load load-1 and
Second load load-2, load-1 is important load, and load-2 is general load, and EMS is according to micro- after the outer net power loss of system
Net internal electric source supplies situation, determines and first powers to important load load-1, will be more on the basis of meeting important load electricity consumption
Remaining electricity supplies general load load-2.LMS is load control system, which is responsible for receiving microgrid energy management system
The control command of EMS and execution, while the operating status of load is monitored, demand response and load monitoring etc. are realized in system
Function, due to using module design theory, actual motion system can constantly extend function according to the demand of user.LMS will connect
The control command of EMS is received, conversion is function to executing agency the first breaker S-L1 and the second breaker S-L2, S-L1 and S-L2
Rate switch, LMS control power switch S-L1's and S-L2 cut-offs, while the state of S-L1 and S-L2 are fed back to EMS.
AC/DC main module is main convertor, is become using the power of traditional H bridge type three-phase three-wire system or three-phase four-wire system
Flow device.The current transformer is responsible for the power flowcontrol by alternating current and direct current, which is connected to the function of system power supply S
The side rate switch S-m.DC side connects the DC side of the DC/AC module of generator G-1, while connecting the DC/DC of battery system B
The other end DC side of the DC side of module, DC/DC module connects DC battery system B.CMS-M is AC/DC main convertor mould
The control system of block, the module are responsible for being converted to the control command of EMS into the control signal of main convertor, while by main convertor
Working condition feed back to EMS.Since main convertor works in a high frequency state, the switching frequency generally used is 10-
50kHz, it is desirable that control system has stronger capability of fast response and protective capability.Simultaneously because the control system needs to use
Instantaneous Power Theory calculates the power conversion between direct current and exchange, it is therefore desirable to which control system has stronger computing capability.
In order to guarantee economy, the stability of system, while the complexity of system is reduced, the module of each function is separately designed.
DC/AC module is responsible for connecting the DC side of generator G-1 and AC/DC main module, and the DC/AC module is by generator
The convert alternating current AC/DC main module acceptable direct current that G-1 is issued, while can guarantee being generated electricity for generator G-1
The power quality of energy.The module is responsible for control by DC/AC module control system CMS-1, and control module CMS-1 major function is
It is responsible for receiving the control command of EMS, converts control command to the control signal of current transformer DC/AC module, while by current transformer
The state of DC/AC module feeds back to EMS, and CMS-1 function and structure is identical as CMS-m.In the exchange of current transformer DC/AC module
Side connects a third breaker S-G1 and generator G-1, specific connection type are as shown in Figure 1.Third breaker S-G1 is to hand over
Breaker is flowed, while receiving the control of GMS-1 and CMS-1, and state is fed back into GMS-1 and CMS-1.S-G1 is mainly born
Duty connection current transformer DC/AC module and generator G-1, when current transformer DC/AC module and generator G-1 can not work normally,
Or when receiving the control command of EMS, the connection of current transformer DC/AC module and generator G-1 can be quickly cut off.G-1 is
Generator can use various forms due to the transformation with DC/AC module using various forms of stand-by generators
Generator, it is single-phase, three equal be ok.GMS-1 is generator control system, which is responsible for receiving the control of EMS
Order, is converted into G-1 acceptable order.S-G1 is controlled simultaneously, and the shape body of S-G1 is fed back into EMS.
DC/DC module is responsible for connecting the DC side of battery system B and AC/DC main module, can pass through the DC/DC module control
The charging and discharging to battery system B are made, or are in standby shape body.The DC/DC module can balance the voltage between direct current.
The module control system is CMS-2, and control system framework is identical as the structure of CMS-M and CMS-1, therefore the side of the Patent design
Method reduces the complexity of system.S-B is dc circuit breaker, is responsible for connection DC/DC module and battery system B.When battery system
B unite when perhaps DC/DC module breaks down or when receiving the control command of EMS, disconnects DC/DC module and battery system B
Connection.B is battery system, is isolated due to using DC/DC module between AC/DC main module, in battery class
Type, battery capacity, cell voltage, battery group mode, battery control mode, battery protection etc. just relatively flexibly, can be with
Using lead carbon battery, ternary lithium battery, ferric phosphate lithium cell, flow battery etc.；Battery capacity can also be according to the demand at scene
Situation flexible configuration, from 10kWh to 10MWh etc..For different burst modes, can also be tied according to battery system B and BMS
Structure feature requires flexible configuration, can be connected again using first in parallel, or parallel connection again etc. of first connecting.Battery control mode can also be with
It, can be using constant-current charge, constant-current discharge, constant-voltage charge, constant voltage discharge, invariable power charging, invariable power using different configurations
Electric discharge, standby mode etc..Battery protection can also carry out flexible configuration according to different batteries, using different manufacturers and different marks
Quasi- battery protection, can specially be cooperated according to different BMS systems.Therefore this system is used, it can very flexibly
Configuration battery requirements, and can situation according to the demand of user, increase and reduce stored energy capacitance.For power battery echelon benefit
It can also very flexibly with the system.Concrete mode can increase power battery storage by the way of increasing DC/DC conversion module
Energy.
EMS is the energy management system of microgrid, is connected with CMS-M, LMS, GMS-1, CMS-1, BMS, CMS-2, while shoulder
Bear the effect for controlling master power switch.In the power flowcontrol of microgrid, the effect of master controller is born.Specially downwards
Each control unit issues control command, while the operating status of each unit being fed back.EMS realizes the trend control to microgrid
Control unit is divided into load, energy-storage battery, generator and other distributed generation resources, adopted for different power supplys by system, the system
With different control strategies, while according to the different application scene of micro-grid system, the functional module of configuration can be increased or decreased.
The system module has and external communication interface and human-machine interface module.
The specific control algolithm of the utility model is as shown in Fig. 2, it includes the following steps：
S1, determine that microgrid normal operation starts；
S2, the operational mode that user just sets is read：Step S3A-1 is transferred to if user setting is island operation state；It is no
Then it is transferred to step S3B-1；
S3A-1, total access switch S-m, the second breaker S-L2 are disconnected, control battery system B discharges；
Whether S3A-2, detection battery system B capacity are lower than setting value：Lower than being then transferred to step S4；It is not below, persistently examines
It surveys；The setting value is the 50% of battery system B capacity；
S3B-1, judge whether dispatch from foreign news agency network electric energy quality meets standard：《Admissible deviation of supply volt- age standard (GB/T12325-
2003)》,《Voltage fluctuation and flicker standard (GB/T12326-2008)》,《Utility grid harmonic standard (GB/14549-
1993)》,《Phase voltage degree of unbalancedness standard (GB/T15543-2008)》,《Power system frequency deviation standard (GB/T15945-
2008)》,《Temporary overvoltage and transient voltage standard (GB/T18481-2001)》, or be set by the user：Meet standard then to turn
Enter step S3B-2；Do not meet standard and is then transferred to step S3A-1；
The power demand of S3B-2, calculated load are preferably calculated using instantaneous reactive power；
Whether S3B-3, the maximum demand for judging load are more than setting value：More than being then transferred to step S3B-4；It is less than, holds
It is continuous to calculate judgement；
S3B-4, stop battery system B charging；
Whether S3B-5, the maximum demand for judging load are more than setting value：More than being then transferred to step S3B-6；It is less than, holds
It is continuous to calculate judgement；
S3B-6, the second breaker S-L2 is disconnected；
Whether S3B-7, the maximum demand for judging load are more than setting value：More than being then transferred to step S3B-8；It is less than, holds
It is continuous to calculate judgement；
Maximum demand needed for S3B-8, battery system B output load；
S3B-9, battery management system BMS is read；
Whether S3B-10, detection battery system B capacity are lower than setting value：Lower than being then transferred to step S4；It is not below and then continues
Detection；The setting value is the 10% of battery system B capacity；
S4, soft start generator G-1 gradually increase generator power using fixed slope curve；
S5, monitoring electrical power generators power, judge whether to suit the requirements：Step S6 is transferred to if satisfaction needs；Do not meet
It needs, return step S4 continues to increase generator power；
S6, battery system B are standby
S7, end；
As shown in figure 3, judging that the step of microgrid operates normally includes in above-mentioned steps S1：
S1-1, micro-grid system information is read；
S1-2, parameter setting is read；
Whether S1-3, detection system are normal；
Whether S1-4, detection external power grid are normal；
Whether S1-5, detection main switch are normal；
Whether S1-6, detection AC/DC main module and CMS-M are normal；
Whether S1-7, detection DC/AC module and CMS-1 are normal；
Whether S1-8, detection generator G-1 and GMS-1 are normal；
Whether S1-9, detection DC/DC module and CMS-2 are normal；
Whether S1-10, detection battery system B are normal；
S1-11, the state for reading each switch.
Specific embodiment described herein is only to illustrate to the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Claims (6)
1. a kind of microgrid framework containing battery energy storage and generator, it is characterised in that it includes：
One end of the total access switch S-m of output end connection of power supply S, power supply S；Power supply S is AC system power supply；
Total access switch S-m, total other end for accessing switch S-m connect multiple branches：
The first branch：Total access switch S-m loads load-1 by the first breaker S-L1 connection first；
Second branch：Total access switch S-m loads load-2 by the second breaker S-L2 connection second；
Third branch：One end of total access switch S-m connection AC/DC main module；
The other end of-AC/DC main module, AC/DC main module connects multiple branches：
4th branch：AC/DC main module sequentially passes through DC/AC module, third breaker S-G1 connection generator G-1；
5th branch：AC/DC main module sequentially passes through DC/DC module, the 4th breaker S-B connection battery system B
Microgrid energy management system EMS, the EMS be separately connected load control system LMS, generator control system GMS-1,
DC/AC module control system CMS-1, the control of battery management system BMS, DC/DC module control system CMS-2, AC/DC main module
System CMS-M,
Load control system LMS is responsible for receiving control command and the execution of EMS, while it is negative to monitor the first load load-1 and second
The operating status for carrying load-2 is fed back to EMS；
Generator control system GMS-1 is responsible for receiving the control command of EMS, and is converted into the order that generator G-1 can receive；
S-G1 is controlled simultaneously, and the working condition of S-G1 is fed back into EMS；
DC/AC module control system CMS-1 is responsible for receiving the control command of EMS, converts control command to the control of DC/AC module
Signal processed, while the working condition of DC/AC module is fed back into EMS；
Battery management system BMS is responsible for receiving the control command of EMS, and is converted into the order that battery system B can receive, simultaneously
The working condition of battery system B is fed back into EMS；
DC/DC module control system CMS-2 is responsible for receiving the control command of EMS, converts control command to the control of DC/DC module
Signal processed, while the working condition of DC/DC module is fed back into EMS；
AC/DC main module control system CMS-M is responsible for receiving the control command of EMS, and control command is converted to AC/DC main module
Control signal, while the working condition of AC/DC main module is fed back into EMS.
2. microgrid framework according to claim 1, it is characterised in that the power supply S is three-phase three-phase system or three-phase four-wire system
Power supply.
3. microgrid framework according to claim 1, it is characterised in that total access switch S-m quickly opens for contactless
Disconnected power switch；The first breaker S-L1 and the second breaker S-L2 is power switch；The third breaker S-G1 is
AC circuit breaker is responsible for connection DC/AC module and generator G-1, can not work normally as DC/AC module and generator G-1 or
The control command that person receives EMS is known, and the connection of DC/AC module and generator G-1 is quickly cut off；4th breaker S-B is straight
Breaker is flowed, is responsible for connection DC/DC module and battery system B, when battery system B or DC/DC module breaks down or connects
When control command by EMS, the connection of DC/DC module and battery system B is disconnected.
4. microgrid framework according to claim 1, it is characterised in that the AC/DC main module uses traditional H bridge type three
The power converter of three-phase three-wire system or three-phase four-wire system.
5. microgrid framework according to claim 1, it is characterised in that the generator G-1 includes single-phase or three-phase generation
Machine.
6. microgrid framework according to claim 1, it is characterised in that described DC/AC module control system CMS-1, DC/DC
The structure of module control system CMS-2, AC/DC main module control system CMS-M is identical.
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| CN108347067A (en) * | 2018-05-07 | 2018-07-31 | 江苏林洋能源股份有限公司 | A kind of microgrid framework and control method containing battery energy storage and generator |
| CN108347067B (en) * | 2018-05-07 | 2024-01-05 | 江苏林洋能源股份有限公司 | Micro-grid architecture containing battery energy storage and generator and control method |
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