CN108832621A - A kind of 35kV power distribution network Connection Mode evaluation method based on 5 dimensions - Google Patents
A kind of 35kV power distribution network Connection Mode evaluation method based on 5 dimensions Download PDFInfo
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- CN108832621A CN108832621A CN201810621104.2A CN201810621104A CN108832621A CN 108832621 A CN108832621 A CN 108832621A CN 201810621104 A CN201810621104 A CN 201810621104A CN 108832621 A CN108832621 A CN 108832621A
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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
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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
- 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]
Abstract
The present invention provides a kind of 35kV power distribution network Connection Mode appraisement systems of 5 dimensions, it is related to technical field of electric power, is invented to choose suitable Connection Mode according to the actual situation in the design of the design of 35kV distribution network planning, feasibility study, client or power plant's access system.The method of the present invention includes：The superiority and inferiority of different 35kV high voltage distribution network Connection Modes is evaluated from 5 dimensions of configuration difficulty of economy, reliability, construction and the difficulty of maintenance, the flexibility of management and running and convenience, relay protection and automatic device; each dimension is subdivided into different main points; entire appraisement system comprehensively, it is complete, have sufficient theoretical foundation; strong operability, the process for the design of the design of 35kV distribution network planning, feasibility study, client or power plant's access system in selection Connection Mode provide strong, comprehensive reference frame.
Description
Technical field
The present invention relates to technical field of electric power, and in particular to a kind of 35kV high voltage distribution network Connection Mode evaluation of five dimensions
Method.
Background technique
Reasonable grid structure be guarantee power grid security, stabilization, economical operation basis.The 35kV high of various countries, each department
Press-fitting power network wiring mode development trend be constantly adjust the old mode of connection, simultaneously adaptation to local conditions use newly connect
Line mode solves the practical problem of operation of power networks to adapt to the growth requirement of social economy.Constantly advance in power distribution network,
Increment distribution network construction is opened to social capital, under the background of investment construction body region diversification, how scientific and reasonable choosing
Selecting the high voltage distribution network mode of connection is the major issue faced in Electric Power Network Planning.
Up to the present, still none of these methods carries out comprehensive summary to the mode of connection of 35kV high voltage distribution network and comments
Valence is mostly empirically to be selected, and each department 35kV high voltage distribution network mode of connection disunity, the situation for being not suitable with locality are more
There is generation.
Therefore comprehensive, system should be carried out around the different modes of connection to the evaluation of the 35kV high voltage distribution network mode of connection
The overall economics of change compare, and basic goal is to provide guidance for the type selecting of the 35kV high voltage distribution network mode of connection and development
Opinion.
Summary of the invention
In view of above-mentioned analysis, the present invention is intended to provide being related to a kind of 35kV high voltage distribution network Connection Mode evaluation of five dimensions
Method, for solving the above problems.
The purpose of the present invention is mainly achieved through the following technical solutions：
A kind of 35kV power distribution network Connection Mode evaluation method based on 5 dimensions, this approach includes the following steps：
Step 1：From route type selecting, the occupancy of the same level and higher level substation interval resource, substation of junior high-pressure side master
The economy of the main points docking ray modes such as investment, line corridor occupancy situation, the line length of composition rack of wiring is divided
Analysis assessment；
Step 2：Probability size, the caused severity of consequence, electricity net safety stable occurred from different type event
The reliability of the one column main points such as Compulsory Feature of operation docking ray mode carries out analysis assessment；
Step 3：The sides such as the difficulty of difficulty, the difficulty that substation extends and the breakdown maintenance and turn power supply taken over the land for use from substation
Face carries out construction maintenance difficulties analysis assessment；
Step 4：Analysis assessment is carried out from the flexibility that dispatching running way adjusts in the case of various failures and maintenance, this is right
Reliability factor can also generate direct influence；
Step 5：From the configuration requirement and corresponding protection seting, dimension of relay protection and automatic safety device
The cost and workload of shield carry out analysis assessment.
The angle evaluation procedure of 3 subdivisions is as follows in the step 1：
1) it according to the method for operation for analyzing different 35kV high voltage distribution network Connection Modes, is required according to stable directive/guide, at this
Under kind normal operating mode, when route N-1 occurs, it should overload problem do not occur, this is the basic principle for choosing 35kV line style；
Substation's normal maximum load is selected according to substation's load factor Controlling principle under the Connection Mode；Current-carrying capacity of cable is by ventilation
Good cable tunnel or cable duct consider that overhead transmission line current-carrying capacity is by 25 degree of environment temperature considerations.
2) the just applicable Substation Bus Arrangement of not wiring respectively is analyzed each substation and is needed to occupy between higher level substation
Every quantity and the same level substation interval quantity.
3) for there is the power grid at the station N number of 35kV, when being approximately considered that each section of line length is equal in route, quantitative analysis is respectively connect
The line length of ray mode simultaneously compares size.
Probability size, the caused severity of consequence, power grid security occurred in the step 2 from different type event
The one column main points such as Compulsory Feature of stable operation evaluate the reliability of different Connection Modes, and steps are as follows：
1) on the severity influenced under route N-1 failure, turn power supply capacity, scheduling operation complexity etc. and analyze；
2) on the severity influenced under route N-2 failure, turn power supply capacity, scheduling operation complexity etc. and analyze；
3) on the severity influenced in the case of substation fault, turn power supply capacity, scheduling operation complexity etc. and divide
Analysis；
4) to severity impacted under higher level's substation bus fault and no-voltage of entire station failure, turn power supply capacity, adjust
Degree Operating Complexity etc. is analyzed；
The step 3 it is a kind of based on construction maintenance difficulties evaluation method is as follows：
1) according to Substation Bus Arrangement analysis substation expropriation of land difficulty under various modes；
2) difficulty is extended according to Substation Bus Arrangement under various modes and method of operation analysis substation；
3) according to breakdown maintenance and turn power supply difficulty；
The step 4 evaluate based on management and running flexibility and convenience；
The configuration complexities based on relay protection and automatic safety device of told step 5 evaluation method is as follows：
1) according to the normal operating mode of power grid under various Connection Modes, the configuration of analysis circuit protection；
2) the bus protection configuration under various Connection Modes is analyzed；
3) analysis is in the case where there is plant-grid connection, the relaying configuration of each mode；
4) according to the method for operation under various Connection Modes, prepared auto restart configuration is analyzed.
The beneficial effects of the invention are as follows：In previous distribution network planning and access system design, to power distribution network wiring mould
The selection of formula is usually based on experience and personalized, it is contemplated that point not comprehensively, not architectonical.Such as the distribution planning people having
Reliability and economy have been paid close attention to when member's selection distribution Connection Mode, so that it may the selection of line style has perhaps been concerned only with for property,
And the line length under the occupancy situation of the same level and higher level substation interval resource, each Connection Mode is not accounted for or
There is no the particular number of the various modes of quantitative analysis；The coverage in the case of different line faults is only accounted for reliability,
But substation fault is not accounted for but；And for operation and maintenance difficulty, management and running convenience, relay protection scheme and
It is not concerned at all in terms of adjusting difficulty；And it is different for the emphasis of another planning personnel concern.It is all at present
In distribution planning and designing technical standard, still selected without the Connection Mode of a set of architecture that can be supplied to planning personnel's reference
And evaluation criterion so that carry out this work when consider it is insufficient, not comprehensively, see son beat son.
It is of the invention provide it is a kind of from economy, reliability, construction and the difficulty of maintenance, management and running flexibility and
The system that 5 dimensions of configuration difficulty of convenience, relay protection and automatic device evaluate 35kV power distribution network Connection Mode,
Each dimension is subdivided into different main points, whole system comprehensively, it is complete, have sufficient theoretical foundation, strong operability is
The design of 35kV distribution network planning, feasibility study, client or the design of power plant's access system are provided in the process of selection Connection Mode
Strong, comprehensive reference frame.
Detailed description of the invention
Fig. 1-1 (number：F-1) become single time radial pattern wiring diagram for one station one of 35kV power distribution network；
Fig. 1-2 (number：F-1) become single time radial pattern wiring diagram for two station two of 35kV power distribution network；
Fig. 1-3 (number：F-2) become double back radial pattern wiring diagram for one station three of 35kV power distribution network；
Fig. 1-4 (number：F-2) become double back radial pattern wiring diagram for one station two of 35kV power distribution network；
Fig. 1-5 (number：F-2) become double back radial pattern wiring diagram for two station two of 35kV power distribution network；
Fig. 2-1 (number：It L-1) is 35kV power distribution network single-side power Dan Huilian chain wiring diagram；
Fig. 2-2 (number：It L-2) is 35kV power distribution network bilateral source Dan Huilian chain wiring diagram；
Fig. 2-3 (number：It L-3) is the incomplete double back chain chain wiring diagram of 35kV power distribution network single-side power；
Fig. 3-1 (number：It T-1) is 35kV power distribution network single-side power list T-type wiring diagram；
Fig. 3-2 (number：It T-2) is the double-T shaped wiring diagram of 35kV power distribution network single-side power；
Fig. 3-3 (number：It T-3) is the not exclusively double-T shaped wiring diagram of 35kV power distribution network bilateral source；
Attached drawing show the several frequently seen Connection Mode of 35kV power distribution network, this attached drawing mainly with《Distribution network planning designs skill
Art directive/guide》(DL/T 5729-2016) and《110 kilovolts of Southern Power Grid Company and following distribution network planning technological guidance principle》
Listed Connection Mode figure is that reference frame is drawn in (2016)；
35kV high voltage distribution network is mainly used for China's vast rural area and combination area of city and country region, is generally overhead line net
Network, rarely cable system.Because of power supply area difference, therefore 35kV high voltage distribution network Connection Mode is slightly different with 110kV；
Scheming (1-1 to 1-5) is several main 35kV power distribution network radial pattern modes of connection.Wherein F-1 is single time radiation
Type wiring, the disadvantage is that power supply reliability is low, be not able to satisfy N-1 safety criterion, the operation of only one power supply is not flexible, substation can
Using single mother partition, inside and outside bridging line；F-2 is the wiring of double back radial pattern, and advantage is that can satisfy N-1 safety criterion, is lacked
Point be only one power supply, operation it is not flexible, single mother partition, inside and outside bridging line can be used in substation；
Scheming (2-1 to 2-3) is several typical 35kV power distribution network chain modes of connection.Wherein L-1 is single-side power list
Chain type wiring is returned, advantage is to meet N-1 safety criterion, the disadvantage is that getting in touch between only one power supply, substation for single line, operation spirit
Activity and reliability be not high, and single female, single mother partition, inside and outside bridging line can be used in substation；L-2 is double survey power supply Dan Huilian, excellent
Point is to meet N-1 safety criterion, the disadvantage is that not high for single line contact, reliability between substation, concatenation substation's number is with 2~3
A to be advisable, substation is using single mother partition, inside and outside bridging line；L-3 is the incomplete double back chain of single-side power, and advantage is to meet N-1
Safety criterion, the disadvantage is that only one power supply point, operational flexibility be not high, concatenation substation's number is advisable with 2~3, power transformation
It stands using single mother partition, inside and outside bridging line；
Scheming (3-1 to 3-3) is several typical 35kV power distribution network T-type modes of connection.Wherein, T-1 is single-side power list
T mode, feature are that power supply reliability is low, operation is not flexible, and single mother partition and inside and outside bridging line can be used in substation；T-2 is single
The double T modes of side power supply, feature is to can satisfy N-1 safety criterion, the disadvantage is that only one power supply, operation are not flexible, concatenation
Substation's number is no more than two, and substation generally uses line transformer group or inside and outside bridging line；T-3 is that bilateral source is endless
Complete double T modes, advantage is to can satisfy N-1 safety criterion, and substation can be using single mother partition, inside and outside bridging line.
Specific embodiment
Specifically describe a certain embodiment of the invention with reference to the accompanying drawing, and together with embodiments of the present invention for explaining
Release the principle of the present invention.
The 35kV power distribution network Connection Mode evaluation method based on 5 dimensions that the invention discloses a kind of, which is characterized in that the party
Method includes the following steps：
Step 1：From route type selecting, the occupancy of the same level and higher level substation interval resource, substation of junior high-pressure side master
The economy of the main points docking ray modes such as investment, line corridor occupancy situation, the line length of composition rack of wiring is divided
Analysis assessment；
Step 2：Probability size, the caused severity of consequence, electricity net safety stable occurred from different type event
The reliability of the one column main points such as Compulsory Feature of operation docking ray mode carries out analysis assessment；
Step 3：The sides such as the difficulty of difficulty, the difficulty that substation extends and the breakdown maintenance and turn power supply taken over the land for use from substation
Face carries out construction maintenance difficulties analysis assessment；
Step 4：Analysis assessment is carried out from the flexibility that dispatching running way adjusts in the case of various failures and maintenance, this is right
Reliability factor can also generate direct influence；
Step 5：From the configuration requirement and corresponding protection seting, dimension of relay protection and automatic safety device
The cost and workload of shield carry out analysis assessment.
The angle evaluation procedure of 3 subdivisions is as follows in the step 1：
1) route type selecting
Due to the open loop requirement of actual motion, chain wiring need to generally break when operating normally in attached drawing (2-1 to 2-3)
The single loop line (L-1, L-2) between the station 35kV is opened, or disconnects substation's second to first or third single loop line.It is required according to stable directive/guide,
Under this normal operating mode, when route N-1 occurs, it should overload problem do not occur, this is the basic of selection 35kV line style
Principle.
Substation's normal maximum load is selected according to substation's load factor Controlling principle of chain wiring：Final scale is 2
The 35kV main transformer of transformer substation of platform main transformer operates normally load factor and considers with 70%, and current-carrying capacity of cable presses draughty cable
Tunnel or cable duct consider that overhead transmission line current-carrying capacity is by 25 degree of environment temperature considerations.When dissipating-heat environment is more severe, route type selecting
Also preferably increase 1~2 grade again.
Thus chain Connection Mode route type selecting such as following table is obtained：
2) Substation Bus Arrangement being applicable in respectively with regard to different radial pattern wiring analyzes each substation and needs to occupy higher level's change
The interval quantity and the same level substation interval quantity in power station.
By taking radial pattern wiring as an example, 35kV substation high-pressure side preferably uses the mode of connection with bus, generally with single mother
Segmentation is advisable.Specific occupancy see the table below：
Probability size, the caused severity of consequence, power grid security occurred in the step 2 from different type event
The one column main points such as Compulsory Feature of stable operation evaluate the reliability of different Connection Modes, and steps are as follows：
1) 35kV route " N-1 " failure
External force destruction, construction cross, insulation breakdown, lightning stroke etc. can cause single back line fault trip, therefore route " N-
1 " probability of happening is opposite be it is higher, it is especially true to overhead transmission line.All substations of chain are singly gone back in chain wiring in route
It can have a power failure in short-term when " N-1 ", need to restore electricity by automatic device (prepared auto restart).And the incomplete double back linkage lines of single-side power
Under, it can only have a power failure in short-term under middle line route " N-1 " failure and restore electricity by prepared auto restart, source side line fault then will not
Causing to have a power failure influences.
2) 35kV route " N-2 " failure
The probability that " N-2 " occurs for the overhead transmission line that common-tower double-return is set up is also relatively high.Cable run " N-2 "
Probability is then general lower.In chain wiring, when all stations of single time chain (L1, L2) can occur longer at route " N-2 "
Between no-voltage of entire station.Route " N-2 " failure occurs under double back chain wiring, it is equal generally to turn powered operation by prepared auto restart and manually
It can restore the power supply stood to 35kV, load will not be lost for a long time substantially.
3) 35kV substation fault
Under chain Connection Mode, there is bus in the station 35kV high-pressure side, and switchgear is more, the failure risk compared with unit connection
It is higher.
4) higher level's substation bus fault and no-voltage of entire station failure
Bus-bar fault is a kind of catastrophe failure, and probability of happening is theoretically lower, but in recent years still when see generation.By
Required in double back chain wiring higher level substation stand two return back out line need to be by different higher level's transformer substation side buses (bus section, busbar section)
Power supply, therefore, higher level's transformer substation side bus " N-1 " failure will not generally cause the station 35kV to have a power failure.Higher level substation station whole station is lost
Pressure belongs to extremely serious failure, and probability of happening is low but harm is big.When higher level substation station no-voltage of entire station occurs, 2 stations are linked
Chain wiring in short-term after decompression, can pass through prepared auto restart or manually turn powered operation and restore the power supply stood to whole 35kV, base
Originally load will not be lost for a long time.The chain wiring for linking 3 stations can turn service restoration to whole by prepared auto restart or manually
The power supply at the station 35kV, but to avoid 35kV circuit overload, it generally requires and takes certain limitation load measure.
The step 3 it is a kind of based on construction maintenance difficulties it is as follows to the evaluation of chain wiring：
1) 35kV substation expropriation of land difficulty
35kV substation is generally more universal with single mother partition wiring using the main wiring mode for having bus in chain wiring
Using.By taking single female single segmentation, Two In and Two Out, two main transformers as an example, 6~7 groups of 35kV substation high-pressure side needs " breaker+every
From switching group ", substation's land occupation is relatively large, and it is more difficult to take over the land for use.
2) 35kV substation extends difficulty
For chain wiring, if initial stage bus one-stage completion, extends main transformer and put into operation the fortune of main transformer to our station
Row does not have much affect, and construction work amount is also smaller.Corresponding 35kV link has generally been built up or path in first stage of construction
It once chooses in the early stage, is not necessarily to new routing diameter.Therefore the station 35kV enlarging difficulty is whole smaller.
3) breakdown maintenance and turn power supply difficulty
In chain wiring, when route " N-1 " failure, is possible to not influence load, it is also possible to which appearance has a power failure in short-term, at this time
It can restore whole load power supplies by prepared auto restart, difficulty is little.Transfer load operation also pertains only under route " N-2 " failure
35kV route, therefore repair and to turn powered operation fairly simple.
The step 4 carries out analysis assessment from the flexibility that dispatching running way adjusts in the case of various failures and maintenance：
1) under chain wiring, 35kV substation is compared flexibly and conveniently using the mode of connection for having bus, management and running.
2) under the T-type mode of connection, the method for operation is fixed, but flexibility is not high.
The configuration difficulty of the relay protection of chain wiring and automatic device is evaluated in the step 5：
1) 35kV power grid uses open loop operation mode, when no power plant surfs the Internet, belongs to the operation of single supply radiant type.Therefore
35kV route generally configures three-stage phase distance protection and stage zero-sequence current protection.For chain wiring, operation
Mode is more flexible, therefore usually needs the definite value of the variation adjusting stage formula protection according to the method for operation, and daily protection is fixed
Value calculates, adjusting adjustment operation task amount is big, and management requires high.When there are ultrashort route, multistage statements based on collusion route, T link,
The superior and the subordinate's cooperation difficulty also will increase, in fact it could happen that actuation time
2) the problem of extending.Technically, consider to configure fibre-optic current differential protection as main protection, and simplify the stage
The configuration and adjusting of formula protection can overcome this deficiency.
3) when, there are when distributed generation resource (such as small power station, photovoltaic, wind-powered electricity generation), 35kV is likely to occur dual power supply in 35kV net
The method of operation.Chain wiring is adapted to the online demand of distributed power grid, but the adjusting of step protection can be more complicated, more
Become, it is proposed that consider configuration differential protection.
4) station 35kV uses the main electrical scheme with bus under chain wiring, it is also necessary to configure bus current differential protection.
5) prepared auto restart is that the power distribution network of open loop operation ensures the important automation means of power supply reliability.Due to a current distant place
Backup auto-activating device reliability is not high, therefore 35kV substation multi-configuration is protected based on the microcomputer prepared auto restart of information on the spot.Actually answer
In, the configuration difficulty of 35kV prepared auto restart often becomes a key factor for restricting incomplete chain wiring application.Because
Many stations 35kV high-pressure sides use single female wiring (no segmentation) or single mother partition wiring, but without configuring section switch, and
Disconnecting link is only configured, thus is not available the standby throwing of bus, circuit backup power automatic switching can only be used.
Qualitative comparison is specifically carried out using incomplete double back chain wiring L-3 and typical case 2T wiring T-2 as representative below：
Claims (6)
1. a kind of 35kV power distribution network Connection Mode evaluation method based on 5 dimensions, which is characterized in that this method includes following step
Suddenly：
Step 1：From route type selecting, the occupancy of the same level and higher level substation interval resource, substation of junior high-pressure side main electrical scheme
Investment, line corridor occupancy situation, the economy for the main points docking ray mode such as line length for constituting rack carry out analysis and comment
Estimate；
Step 2：Probability size, the caused severity of consequence, power network safety operation occurred from different type event
The reliability of the column main points docking ray mode such as Compulsory Feature carry out analysis assessment；
Step 3：Difficulty and breakdown maintenance that the difficulty taken over the land for use from substation, substation extend and turn difficulty etc. of power supply into
Row construction maintenance difficulties analysis assessment；
Step 4：Analysis assessment is carried out from the flexibility that dispatching running way adjusts in the case of various failures and maintenance, this is to reliable
Sexual factor can also generate direct influence；
Step 5：From the configuration requirement and corresponding protection seting of relay protection and automatic safety device, maintenance
Cost and workload carry out analysis assessment.
2. a kind of 35kV power distribution network Connection Mode evaluation method based on 5 dimensions, feature described according to claim 1 exist
In the angle evaluation procedure of 3 subdivisions is as follows in the step 1：
1) according to the method for operation for analyzing different 35kV high voltage distribution network Connection Modes, required according to stable directive/guide, it is this just
Under the normal method of operation, when route N-1 occurs, it should overload problem do not occur, this is the basic principle for choosing 35kV line style；Power transformation
Normal maximum load of standing is selected according to substation's load factor Controlling principle under the Connection Mode；Current-carrying capacity of cable presses well-ventilated
Cable tunnel or cable duct consider, overhead transmission line current-carrying capacity by 25 degree of environment temperature consider；
2) Substation Bus Arrangement being applicable in respectively with regard to different chain wiring and T-type wiring analyzes each substation and needs to occupy
The interval quantity and the same level substation interval quantity of grade substation；
3) for there is the power grid at the station N number of 35kV, when being approximately considered that each section of line length is equal in route, each wiring mould of quantitative analysis
The line length of formula simultaneously compares size.
3. a kind of 35kV power distribution network Connection Mode evaluation method based on 5 dimensions according to claim 1, feature exist
In probability size, the caused severity of consequence, electricity net safety stable occurred in the step 2 from different type event
The one column main points such as Compulsory Feature of operation evaluate the reliability of different Connection Modes, and steps are as follows：
1) on the severity influenced under route N-1 failure, turn power supply capacity, scheduling operation complexity etc. and analyze；
2) on the severity influenced under route N-2 failure, turn power supply capacity, scheduling operation complexity etc. and analyze；
3) on the severity influenced in the case of substation fault, turn power supply capacity, scheduling operation complexity etc. and analyze；
4) to severity impacted under higher level's substation bus fault and no-voltage of entire station failure, turn power supply capacity, scheduling grasp
Make complexity etc. to be analyzed.
4. a kind of 35kV power distribution network Connection Mode evaluation method based on 5 dimensions according to claim 1, feature exist
Evaluate based on management and running flexibility and convenience in, the step 4.
5. a kind of 35kV power distribution network Connection Mode evaluation method based on 5 dimensions according to claim 1, the progress
Maintenance difficulties analysis assessment is built, its step are as follows：
1) according to Substation Bus Arrangement analysis substation expropriation of land difficulty under various modes；
2) difficulty is extended according to Substation Bus Arrangement under various modes and method of operation analysis substation；
3) according to breakdown maintenance and turn power supply difficulty.
6. a kind of 35kV power distribution network Connection Mode evaluation method based on 5 dimensions according to claim 1, the step
The evaluation method of 5 configuration complexities based on relay protection and automatic safety device, steps are as follows：
1) according to the normal operating mode of power grid under various Connection Modes, the configuration of analysis circuit protection；
2) the bus protection configuration under various Connection Modes is analyzed；
3) analysis is in the case where there is plant-grid connection, the relaying configuration of each mode；
4) according to the method for operation under various Connection Modes, prepared auto restart configuration is analyzed.
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Application publication date: 20181116 |