CN105870893B - The relaying configuration method of microgrid group - Google Patents
The relaying configuration method of microgrid group Download PDFInfo
- Publication number
- CN105870893B CN105870893B CN201610201345.2A CN201610201345A CN105870893B CN 105870893 B CN105870893 B CN 105870893B CN 201610201345 A CN201610201345 A CN 201610201345A CN 105870893 B CN105870893 B CN 105870893B
- Authority
- CN
- China
- Prior art keywords
- micro
- microgrid
- capacitance sensor
- overcurrent
- switch
- 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
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/28—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for meshed systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/226—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices for wires or cables, e.g. heating wires
-
- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
-
- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Protection Of Static Devices (AREA)
Abstract
The present invention relates to a kind of relaying configuration method of microgrid group, this method includes：First overcurrent protective device and first direction element are set at the grid-connected switch of distributed generation resource; the overcurrent protective device is used to open two-period form overcurrent protection when branch where the distributed generation resource breaks down, and it is to be directed toward the electric current of the distributed generation resource to flow through that the first direction element, which is used to make current direction,.Relaying configuration method provided by the invention; first overcurrent protective device and first direction element are set at the grid-connected switch of distributed generation resource; current direction changes apparent distributed generation resource and can be cut off to fault current by first direction element when for failure; the distributed generation resource that current direction variation unobvious but fault current size obviously increase when for failure can cut off fault current by the first overcurrent protective device, to realize the normal work of microgrid group.
Description
Technical field
The present invention relates to grid configuration technical fields, more particularly, to a kind of relaying configuration method of microgrid group.
Background technology
Important component of the micro-capacitance sensor as intelligent grid, has there is extensive use at present, by distributed generation resource with
Micro-capacitance sensor form forms a two-way schedulable unit and is linked into power grid, is the most effective side for playing distributed electrical source efficiency
Formula.Microgrid group refer to by the close multiple micro-capacitance sensors in geographical location it is middle pressure or low-voltage network interconnect it is being formed, have it is specific
The group of function and operational objective, there are common node (claim group PCC nodes) between the group and power distribution network, the member in group
Not only it was total to complete micro-capacitance sensor feature and function but also with receiving and execution group's grade scheduling and coordination control command completion group
With the function of operational objective.
As wind-power electricity generation, photovoltaic generation distributed power supply are in the access of distribution network system, original passive network change
Trend for active electric network, system is distributed from unidirectionally becoming two-way circulating, and failure is possible to that false protection, choosing can be caused when occurring
The problems such as selecting sexual disorder.
Invention content
In this regard, the present invention provides a kind of relaying configuration method of microgrid group, when this method can be to distributed generation resource failure
Disengagement failure electric current ensures the normal work of microgrid group.
In the relaying configuration method of microgrid group provided by the invention, the microgrid group includes microgrid group busbar, multiple microgrids
Interconnection and multiple micro-capacitance sensors, each micro-capacitance sensor are switched by first node and are connected one to one with each microgrid interconnection, respectively
A microgrid interconnection is switched by microgrid interconnection higher level and is connect with the microgrid group busbar, and the microgrid group busbar passes through second
Node Switch is connect with higher level's power distribution network；Each micro-capacitance sensor includes micro-capacitance sensor busbar, distributed generation resource, energy-storage units, load list
Member and controller, the distributed generation resource, the energy-storage units and the load cell pass through grid-connected switch and micro- electricity
Net busbar connects；The configuration method includes：
First overcurrent protective device and first direction element, the mistake are set at the grid-connected switch of the distributed generation resource
Protective device is flowed to be used to open two-period form overcurrent protection, the first party when branch where the distributed generation resource breaks down
It is to be directed toward the electric current of the distributed generation resource to flow through to be used to make current direction to element.
Optionally, the configuration method further includes：
Second overcurrent protective device is set at the grid-connected switch of the load cell, and second overcurrent protective device is used
Two-period form overcurrent protection is opened when the branch where the load cell breaks down.
Optionally, the configuration method further includes：
Third overcurrent protective device and second direction element, the third overcurrent are configured at each first node switch
Protective device is used for the unlatching three-stage overcurrent protection when microgrid interconnection that the first node connect breaks down, and described second
It is to be directed toward the electric current of higher level's power distribution network to flow through that directional element, which is used to make current direction,.
Optionally, the configuration method further includes：
The 4th overcurrent protective device of configuration and third direction element at each microgrid interconnection higher level's switch, the described 4th
Overcurrent protective device, which is used to switch when corresponding micro-capacitance sensor busbar breaks down in microgrid interconnection higher level, opens three-stage mistake
Stream protection, the third direction element is for making current direction be to be directed toward first in branch where microgrid interconnection higher level switchs
The electric current of Node Switch flows through.
Optionally, the configuration method further includes：
Differential protection is configured on the microgrid group busbar, the differential protection is used in microgrid group mother
Line opens bus differential protecting when breaking down.
Optionally, the configuration method further includes：
In the second node switchgear distribution isolated island protection module, the isolated island protection module is used in higher level's distribution
The second node is switched into tripping when net breaks down, carries out isolated island protection.
Optionally, the configuration method further includes：
Isolated island protection module is configured in the inverter of the energy-storage units, the isolated island protection module is used in the storage
Isolated island protection can be opened where unit when branch failure.
The first overcurrent protective device is arranged in relaying configuration method provided by the invention at the grid-connected switch of distributed generation resource
With first direction element, the apparent distributed generation resource of current direction variation can be by first direction element to failure when for failure
Electric current is cut off, and the distributed generation resource that current direction variation unobvious but fault current size obviously increase when for failure can
Fault current is cut off by the first overcurrent protective device, to realize the normal work of microgrid group.
Description of the drawings
By reference to attached drawing can be more clearly understood the present invention characteristic information and advantage, attached drawing be schematically without
It is interpreted as carrying out any restrictions to the present invention, in the accompanying drawings：
Fig. 1 shows a kind of structural schematic diagram of microgrid group；
Fig. 2 shows the failure schematic diagrames of microgrid group in Fig. 1.
Specific implementation mode
To better understand the objects, features and advantages of the present invention, below in conjunction with the accompanying drawings and specific real
Mode is applied the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application
Feature in example and embodiment can be combined with each other.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still, the present invention may be used also
To be implemented different from other modes described here using other, therefore, protection scope of the present invention is not by described below
Specific embodiment limitation.
Microgrid group refer to by the close multiple micro-capacitance sensors in geographical location it is middle pressure or low-voltage network interconnect it is being formed, have
The group of specific function and operational objective, as shown in Figure 1, microgrid group includes microgrid group busbar, multiple microgrid interconnections and multiple
Micro-capacitance sensor, it is a pair of with each microgrid interconnection one that each micro-capacitance sensor by first node switchs (PCC1, PCC2 ..., PCCn)
It should connect, each microgrid interconnection switchs (K1, K2 ..., Kn) by microgrid interconnection higher level and connect with microgrid group's busbar, institute
Microgrid group busbar is stated to connect with higher level's power distribution network by second node switch PCC；Each micro-capacitance sensor includes micro-capacitance sensor busbar, distribution
Formula power supply, energy-storage units, load cell and controller, the distributed generation resource, the energy-storage units and the load cell are equal
It is connect with the micro-capacitance sensor busbar by grid-connected switch, wherein the grid-connected switch of distributed generation resource indicates with Kdg, load cell
Grid-connected switch indicated with Kload, distributed generation resource, that is, photovoltaic, motor distributed power supply.The controller of micro-capacitance sensor is for connecing
The operation data of the primary equipments such as distributed generation resource in micro-capacitance sensor, energy storage, load and PCCn switches is received and handles, while according to micro-
Power grid PCCn on off states, load condition, distributed generation resource state and micro-capacitance sensor operating status issue control to each primary equipment
Instruction.
For the above microgrid group, the present invention provides a kind of relaying configuration method, and this method includes：
First overcurrent protective device and first direction element, the mistake are set at the grid-connected switch of the distributed generation resource
Protective device is flowed to be used to open two-period form overcurrent protection, the first party when branch where the distributed generation resource breaks down
It is to be directed toward the electric current of the distributed generation resource to flow through to be used to make current direction to element.
In practical applications, relay can be used in overcurrent protective device.
Distributed generation resource can be divided into two kinds of power supplys of single phase power supply and two-phase power supply according to current direction, wherein：
The distributed generation resource of single phase power supply includes mainly the power generation of hair volt, wind-power electricity generation and diesel power generation etc., is normally supplied
Current direction is directed toward micro-capacitance sensor busbar when electric, and fault current is noted by this branch distributed generation resource and other power supplys respectively when failure
Enter, electric current is changed to point to Generation Side by direction busbar at micro-capacitance sensor bus bar side switch, and current direction variation is apparent.
The distributed generation resource of two-phase power supply includes mainly thermoelectric cold connection, battery etc., when normal power supply when current direction and
It is directed toward Generation Side when being directed toward microgrid busbar, and fault current is noted by this branch distributed generation resource and other power supplys respectively when failure
Enter, at bus bar side switch electric current be directed toward Generation Side, current direction change unobvious, but fault current can have than normal current it is bright
Increase aobviously.
The first overcurrent protective device is arranged in relaying configuration method provided by the invention at the grid-connected switch of distributed generation resource
With first direction element, the apparent distributed generation resource of current direction variation can be by first direction element to failure when for failure
Electric current is cut off, and the distributed generation resource that current direction variation unobvious but fault current size obviously increase when for failure can
Fault current is cut off by the first overcurrent protective device, to realize the normal work of microgrid group.
In the specific implementation, configuration method provided by the invention can also include：
Second overcurrent protective device is set at the grid-connected switch of the load cell, and second overcurrent protective device is used
Two-period form overcurrent protection is opened when the branch where the load cell breaks down.
Wherein, load cell, such as single phase power supply generating equipment.
Load side is directed toward in the normal current direction of branch where load cell, event when branch breaks down where load cell
Barrier electric current is still injected by power supply, and electric current still points to load cell at micro-capacitance sensor bus bar side switch, but electric current significantly increases.
Therefore, the second overcurrent protective device is set at the grid-connected switch of load cell here, and current direction changes not when for failure
The load cell that apparent but fault current size obviously increases can cut off fault current by the second overcurrent protective device,
To realize the normal work of microgrid group.
In the specific implementation, configuration method provided by the invention further includes：
Third overcurrent protective device and second direction element, the third overcurrent are configured at each first node switch
Protective device is used for the unlatching three-stage overcurrent protection when microgrid interconnection that the first node connect breaks down, and described second
It is to be directed toward the electric current of higher level's power distribution network to flow through that directional element, which is used to make current direction,.
When microgrid interconnection normal operation, when current direction and it is directed toward subordinate's micro-capacitance sensor when being directed toward higher level's power distribution network, but
Higher level's power distribution network switch is that second node switch is consistent with current direction at subordinate micro-capacitance sensor switch i.e. first node switch.Failure
When generation, respectively by higher level's power distribution network and subordinate's micro-capacitance sensor injection, second node switchs and electric current at first node switch electric current
Direction is micro- to realize on the contrary, therefore the three-stage overcurrent protection in higher level's power distribution network direction is directed toward in configuration on first node switch
Net the normal work of group.
In the specific implementation, configuration method provided by the invention further includes：
The 4th overcurrent protective device of configuration and third direction element at each microgrid interconnection higher level's switch, the described 4th
Overcurrent protective device, which is used to switch when corresponding micro-capacitance sensor busbar breaks down in microgrid interconnection higher level, opens three-stage mistake
Stream protection, the third direction element is for making current direction be to be directed toward first in branch where microgrid interconnection higher level switchs
The electric current of Node Switch flows through.
When micro-capacitance sensor busbar breaks down, all branches on tripping fault bus are first had to, then promptly by failure
Busbar is disconnected with higher level's power distribution network, in order to avoid fault coverage expands, therefore microgrid interconnection higher level's switchgear distribution is directed toward micro-capacitance sensor mother
The three-stage overcurrent protection in line direction, to solve the matching problem of microgrid interconnection higher level switch and each branch.
In the specific implementation, configuration method provided by the invention can also include：
Differential protection is configured on the microgrid group busbar, the differential protection is used in microgrid group mother
Line opens bus differential protecting when breaking down.
In microgrid group's bus-bar fault, all branches on tripping microgrid group's busbar are needed, but its subordinate's micro-capacitance sensor can also be just
Often operation, so the promptly off-the-line before the action of distributed generation resource main body protection is needed, in order to avoid fault coverage expansion, therefore match herein
Set bus differential protecting.
In the specific implementation, configuration method provided by the invention further includes：
In the second node switchgear distribution isolated island protection module, the isolated island protection module is used in higher level's distribution
The second node is switched into tripping when net breaks down, carries out isolated island protection.
Wherein, isolated island protection module, as long as element or device with isolated island defencive function, not to this present invention
It limits.
When breaking down outside microgrid group, protects timely tripping second node to switch by opening isolated island, net side will be matched
Fault Isolation makes its subordinate's micro-capacitance sensor normal operation.
In the specific implementation, configuration method provided by the invention further includes：
Isolated island protection module is configured in the inverter of the energy-storage units, the isolated island protection module is used in the storage
Isolated island protection can be opened where unit when branch failure.
Wherein, isolated island protection module, as long as element or device with isolated island defencive function, not to this present invention
It limits.
When branch where energy-storage units breaks down, the charge-discharge electric power of energy-storage units increases rapidly, and at this moment starts lonely
Island protection can be by Fault Isolation.
In the specific implementation, photovoltaic, wind turbine distributed power supply, energy-storage units etc. are to access micro-capacitance sensor by inverter
, since inverter autoprotection function includes hardware protection, the soft protection of DC side and the soft protection of exchange side, event occurs
When barrier, directly control that inverter is out of service to can be realized Fault Isolation by inverter protection.
It will be appreciated that any of the above allocation plan provided by the invention in the absence of conflict can in any combination,
Technical solution after combination is still fallen within the protection scope of the present invention.
Above-mentioned configuration method provided by the invention is introduced in specific works scene below：
(1) the place branch trouble of distribution power
Step 1：When power branch breaks down at F2, Kdg switches flow through fault current at this time, and branch is directed toward in direction
Power supply, opens overcurrent protection action, and tripping Kdg switches cut off trouble power branch；Inverter at power outlet opens protection
Action makes distributed generation resource stop transport.If K1 switches do not open protection act, Kdg carries out reclosing, if reclosing success,
Then inverter startup distributed generation resource normal operation, if unsuccessful reclosing, excision trouble power branch operation.
Step 2：K1 switches flow through fault current, and the first node switch PCC1 of this branch micro-capacitance sensor is directed toward in direction, such as
Fruit K1 opens overcurrent protection action, then tripping switchs；Energy-storage units charge-discharge electric power quickly increases, and starts isolated island protection, micro- electricity
The controller of net 1 detects the first node switch PCC1 that isolated island protection disconnects, 1 islet operation of micro-capacitance sensor.
Step 3：If switch Kdg, K1 reclosing success, the first node of the controller control micro-capacitance sensor of micro-capacitance sensor 1 is opened
Pass PCC1 switch time delays are grid-connected, which avoids K1 reclosing actuation times by the controller tuning of micro-capacitance sensor 1.If switch
Kdg, K1 unsuccessful reclosing, then 1 islet operation of micro-capacitance sensor.
(2) the place branch trouble of load cell
Step 1：When being load branch circuit failure at F3, Kload switches flow through fault current, open overcurrent protection action,
Tripping Kload switches, cut off failure load branch circuit.If K1 switch protections are not operating, Kdg carries out reclosing, if overlapped
Lock success, on-load normal operation cut off load operation if unsuccessful reclosing.
Step 2: step 3 is identical as step two, the step 3 in (1).
(3) micro-capacitance sensor bus-bar fault
Step 1：When being micro-capacitance sensor bus-bar fault at F4, K1 switches flow through fault current, and this branch is directed toward in direction
PCC1 is switched, overcurrent protection action, tripping K1 switches, excision micro-capacitance sensor side fault current；Since fault point is inside micro-capacitance sensor,
Distributed generation resource, energy storage exit inverter protection act excision distributed generation resource and energy storage avoid continuing to export to fault point
Fault current.
Step 2：If switch K1 reclosing success, in inverter startup micro-capacitance sensor 1 distributed generation resource, energy storage normally transport
Row, if unsuccessful reclosing, excision micro-capacitance sensor 1 is run.
(4) micro-capacitance sensor fault of interconnected transmission line
Step 1：When being micro-capacitance sensor fault of interconnected transmission line at F5, K1 switches flow through fault current, and to be directed toward this branch micro- in direction
Power grid PCC1 switches, overcurrent protection action, tripping K1 switches cut off system side failure electric current；PCC1 switches flow through fault current,
And higher level's power grid, overcurrent protection action, rapid tripping PCC1 are directed toward in direction.Energy-storage units charge-discharge electric power quickly increases, and starts
Isolated island is protected, and 1 controller of micro-capacitance sensor detects that isolated island protection control micro-capacitance sensor 1 is transferred to isolated power grid.
Step 2：If switch K1 reclosing success, the PCC1 switch time delays of the controller control micro-capacitance sensor of micro-capacitance sensor 1 are simultaneously
Net, the delay avoid K1 reclosing actuation times by the controller tuning of micro-capacitance sensor 1.If switch K1 unsuccessful reclosings, micro-
1 islet operation of power grid.
(5) microgrid group bus-bar fault
Step 1：When being microgrid group's bus-bar fault at F1, starts bus differential protecting and act, on tripping microgrid group's busbar
All branch switch, including PCC switches, K1 ... Kn switches, the energy-storage units charge-discharge electric power of micro-capacitance sensor 1 ... micro-capacitance sensor n are quick
Increase, start isolated island protection, the controller of micro-capacitance sensor 1 ... micro-capacitance sensor n detects that isolated island protection controls each micro-capacitance sensor and is transferred to isolated island
Operation.
Step 2：If switch PCC, K1 ... Kn reclosing success, the controller of micro-capacitance sensor 1 ... micro-capacitance sensor n controls micro- electricity
PCC1 ... the PCCn switch time delays of net are grid-connected, and the delay is by the controller tuning of micro-capacitance sensor, and avoiding PCC, K1 ..., Kn reclosings are dynamic
Make the time.If switch PCC, K1 ... Kn unsuccessful reclosings, micro-capacitance sensor 1 ... micro-capacitance sensor n islet operations.
(6) microgrid group external fault
Step 1：When being microgrid group's external fault at F6, microgrid group PCC switchs isolated island protection act, and tripping PCC is switched,
Eliminate reversed increasing-aid current of the microgrid group to generation at short trouble.PCC1 ... PCCn switches flow through fault current, and direction refers to
Superior power grid, overcurrent protection action, tripping PCC1 ... PCCn.The energy-storage units charge-discharge electric power of micro-capacitance sensor 1 ... micro-capacitance sensor n is fast
Speed increases, and starts isolated island protection, and the controller of micro-capacitance sensor 1 ... micro-capacitance sensor n detects that isolated island protection controls each micro-capacitance sensor and is transferred to orphan
Island is run.
Step 2：If switch PCC reclosing success, the controller control micro-capacitance sensor of micro-capacitance sensor 1 ... micro-capacitance sensor n
PCC1 ... PCCn switch time delays are grid-connected, which avoids PCC reclosing actuation times by the controller tuning of micro-capacitance sensor.If
Switch PCC unsuccessful reclosings, then micro-capacitance sensor 1 ... micro-capacitance sensor n islet operations.
By above-mentioned analysis it is found that the present invention is using ripe overcurrent protection principle under the scene, according to failure and non-event
Electric current when barrier is directed toward, incoming direction element, and by the rapid communication of the controller with micro-capacitance sensor, adjustment guard time is adjusted
Value accomplishes the connection for disconnecting microgrid group and power distribution network in time, not to distribution network failure when higher level's distribution network line breaks down
Locate the reversed increasing-aid current generated；When breaking down inside microgrid group, accomplish that protective relaying device promptly and accurately disconnects, ensures
The safe and stable operation of subordinate's circuit.In addition, it is relaying configuration device economy, simple, it is not necessarily to additional land used, protection act is disobeyed
Rely communication, securely and reliably.Meanwhile and can there is communication to interact with the controller of micro-capacitance sensor, ensure that single micro-capacitance sensor internal security is steady
Fixed operation, self-healing property are strong.
In the present invention, term " first ", " second ", " third ", " the 4th " are used for description purposes only, and should not be understood as
Instruction implies relative importance.Term " multiple " refers to two or more, unless otherwise restricted clearly.
Although the embodiments of the invention are described in conjunction with the attached drawings, but those skilled in the art can not depart from this hair
Various modifications and variations are made in the case of bright spirit and scope, such modifications and variations are each fallen within by appended claims
Within limited range.
Claims (7)
1. a kind of relaying configuration method of microgrid group, which is characterized in that the microgrid group includes microgrid group busbar, multiple microgrids connection
Winding thread and multiple micro-capacitance sensors, each micro-capacitance sensor is switched by first node and is connected one to one with each microgrid interconnection, each
Microgrid interconnection is switched by microgrid interconnection higher level and is connect with the microgrid group busbar, and the microgrid group busbar passes through the second section
Point switch is connect with higher level's power distribution network；Each micro-capacitance sensor includes micro-capacitance sensor busbar, distributed generation resource, energy-storage units, load cell
And controller, the distributed generation resource, the energy-storage units and the load cell pass through grid-connected switch and the micro-capacitance sensor
Busbar connects；The configuration method includes：
First overcurrent protective device and first direction element are set at the grid-connected switch of the distributed generation resource, and the overcurrent is protected
Protection unit is used to open two-period form overcurrent protection, the first direction member when branch where the distributed generation resource breaks down
It is to be directed toward the electric current of the distributed generation resource to flow through that part, which is used to make current direction,.
2. according to the method described in claim 1, it is characterized in that, the configuration method further includes：
Second overcurrent protective device is set at the grid-connected switch of the load cell, and second overcurrent protective device is used for
Branch where the load cell opens two-period form overcurrent protection when breaking down.
3. according to the method described in claim 1, it is characterized in that, the configuration method further includes：
Third overcurrent protective device and second direction element, the third overcurrent protection are configured at each first node switch
Device is used to open three-stage overcurrent protection, the second direction when the microgrid interconnection that the first node connects breaks down
It is to be directed toward the electric current of higher level's power distribution network to flow through that element, which is used to make current direction,.
4. according to the method described in claim 1, it is characterized in that, the configuration method further includes：
The 4th overcurrent protective device and third direction element, the 4th overcurrent are configured at each microgrid interconnection higher level's switch
Protective device, which is used to switch in microgrid interconnection higher level, opens three-stage overcurrent guarantor when corresponding micro-capacitance sensor busbar breaks down
Shield, the third direction element is for making current direction be to be directed toward first node in branch where microgrid interconnection higher level switchs
The electric current of switch flows through.
5. according to the method described in claim 1, it is characterized in that, the configuration method further includes：
Differential protection is configured on the microgrid group busbar, the differential protection in the microgrid group busbar for going out
Existing fail-open bus differential protecting.
6. according to the method described in claim 1, it is characterized in that, the configuration method further includes：
In the second node switchgear distribution isolated island protection module, the isolated island protection module in higher level's power distribution network for going out
The second node is switched into tripping when existing failure, carries out isolated island protection.
7. according to the method described in claim 1, it is characterized in that, the configuration method further includes：
Isolated island protection module is configured in the inverter of the energy-storage units, the isolated island protection module is used in the energy storage list
Branch where first opens isolated island protection when breaking down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610201345.2A CN105870893B (en) | 2016-03-31 | 2016-03-31 | The relaying configuration method of microgrid group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610201345.2A CN105870893B (en) | 2016-03-31 | 2016-03-31 | The relaying configuration method of microgrid group |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105870893A CN105870893A (en) | 2016-08-17 |
| CN105870893B true CN105870893B (en) | 2018-09-18 |
Family
ID=56628032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610201345.2A Active CN105870893B (en) | 2016-03-31 | 2016-03-31 | The relaying configuration method of microgrid group |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105870893B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109599869B (en) * | 2017-09-30 | 2022-04-19 | 南京南瑞继保电气有限公司 | Method for constructing safety island system based on large unit and large load and stability control method |
| CN109995070A (en) * | 2017-12-29 | 2019-07-09 | 西门子公司 | Micro-grid system |
| US11831158B2 (en) | 2018-01-31 | 2023-11-28 | Siemens Aktiengesellschaft | Power grid fault detection method and device with distributed energy resource |
| CN110120657B (en) | 2018-02-06 | 2022-04-08 | 西门子公司 | Unit power grid protection device, large power grid and method for controlling unit power grid protection device |
| ES2955027T3 (en) * | 2018-04-25 | 2023-11-28 | Schneider Electric Ind Sas | Overcurrent protection device for microgrids |
| CN115133502B (en) * | 2022-06-22 | 2023-09-29 | 上海勘测设计研究院有限公司 | Alternating current bus fault removal method for energy storage power station |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825363A (en) * | 2014-02-26 | 2014-05-28 | 中国农业大学 | Wind-solar low voltage storage micro-grid group protection coordinating controller |
-
2016
- 2016-03-31 CN CN201610201345.2A patent/CN105870893B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825363A (en) * | 2014-02-26 | 2014-05-28 | 中国农业大学 | Wind-solar low voltage storage micro-grid group protection coordinating controller |
Non-Patent Citations (2)
| Title |
|---|
| 分布式发电条件下配电***保护原理研究;孙景钌;《中国学术文献网络出版总库》;20100601;第11-18、72-77页 * |
| 基于双向信息的微电网二次保护***研究;刘喆;《科协论坛》;20131230;第45-46页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105870893A (en) | 2016-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105870893B (en) | The relaying configuration method of microgrid group | |
| CN103299503B (en) | Operational approach by the photovoltaic apparatus in feeding power to medium voltage supply of electric power net | |
| US10700514B2 (en) | DC electrical network | |
| Prasai et al. | Protection of meshed microgrids with communication overlay | |
| Islam et al. | Study of micro grid safety & protection strategies with control system infrastructures | |
| CN209358242U (en) | A kind of long-range differential protection | |
| Wang et al. | Control and protection sequence for recovery and reconfiguration of an offshore integrated MMC multi-terminal HVDC system under DC faults | |
| US9912160B2 (en) | Method for safe isolation and reconnect of grid generation devices to energy storage or alternate generation reference | |
| US10951034B2 (en) | Protection for an HVDC network | |
| CN208433908U (en) | Voltage source converter module and inverter | |
| CN113508506B (en) | Photovoltaic power generation system, photovoltaic inverter and direct current collection flow box | |
| CN104300580A (en) | Reclosure method involving distributed generation power distribution network based on wide area information | |
| CN106253336A (en) | Distributed power source isolated island effect prevention relay protecting method | |
| US20160268914A1 (en) | Redundant control device and method of hvdc system | |
| CA3238439A1 (en) | Dispatchable decentralized scalable solar generation systems | |
| CN103825363A (en) | Wind-solar low voltage storage micro-grid group protection coordinating controller | |
| CN103166308B (en) | A kind of bus differential protection locking prepared auto restart loop | |
| CN110098599A (en) | A kind of fault handling method and system of overhead lines combined with cable | |
| CN206894349U (en) | Generator auto-start control circuit and power distribution equipment | |
| CN108418193A (en) | The failure service restoration method and system that reclosing is combined with low voltage crossing | |
| Kumar et al. | Solid-state circuit breakers in distributed energy resources | |
| CN108964112A (en) | The wiring construction and its operation method of small steam turbine generator access high-voltage Auxiliary electric system | |
| Elsamahy | Reducing Microgrids Integration Complexity in Distribution Networks Considering Bidirectional Power Flow in SFCLs | |
| Benasla et al. | Benefits of HVDC for reducing the risk of cascading outages and large blackouts in AC/DC hybrid grid | |
| CN103840553B (en) | Failure starting circuit and method for starting failure circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |