CN108879766A - A kind of micro-capacitance sensor rapid coordination Control protection system and its method - Google Patents
A kind of micro-capacitance sensor rapid coordination Control protection system and its method Download PDFInfo
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- CN108879766A CN108879766A CN201810735697.5A CN201810735697A CN108879766A CN 108879766 A CN108879766 A CN 108879766A CN 201810735697 A CN201810735697 A CN 201810735697A CN 108879766 A CN108879766 A CN 108879766A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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Abstract
The present invention provides a kind of micro-capacitance sensor rapid coordination Control protection system, the system include micro electric network coordination control protective unit, communication network, master control distributed generation resource, from control distributed generation resource, protection device；The micro electric network coordination control protective unit has isolated island monitoring, dominant eigenvalues control, frequency modulation and voltage modulation, power smooth control, frequency and voltage emergency control, operational mode switching, overcurrent protection function；The present invention further correspondingly discloses a kind of control method of micro-capacitance sensor rapid coordination Control protection system; after the protection device receives micro electric network coordination control protective unit and off-network status command; implement definite value adaptively to switch, solves the problems, such as that fault current is inconsistent under micro-capacitance sensor difference operating status.The present invention realizes micro-capacitance sensor safe and stable operation under grid-connected and off-network two states, is suitble to practical engineering application by coordinated control of the micro electric network coordination control protective unit to distributed generation resource and load.
Description
Technical field
The present invention relates to distributed power generation and micro-capacitance sensor technical fields, quickly assist more specifically to a kind of micro-capacitance sensor
Regulation system protection system and method.
Background technique
Micro-capacitance sensor refers to by distributed generation resource, energy storage device, energy conversion device, associated loadings and monitoring, protective device
Small-sized electric system made of collecting, being one can be realized self-contr ol, protection and the autonomous system of management, both can be with
External electrical network is incorporated into the power networks, can also be with isolated operation.Whether coupled with external bulk power grid according to micro-capacitance sensor, micro-capacitance sensor can be divided into connection
Net type micro-capacitance sensor and self micro-capacitance sensor.Interconnection type micro-capacitance sensor is generally used for industrial park, enterprise, community, hospital, school etc.
There are grid-connected and independent two kinds of operational modes to be incorporated into the power networks under grid-connected operating mode with power distribution network, realize energy for region
Two-way exchange.In the case where external electrical network power failure, isolated operation mode can be switched to, improve power supply reliability.Micro- electricity
Net provides effective approach for the power supply of remote districts and the consumption of clean energy resource.
Micro-capacitance sensor is when being subjected to simultaneously/off-network state switching or meeting with load fluctuation, the disturbance such as power failure, to each distribution
The quick setting of the control model, control parameter of power supply, in combination with the quick control to load, it is ensured that the peace of micro-grid system
Full stable operation is most important.
Summary of the invention
The object of the present invention is to provide a kind of micro-capacitance sensor rapid coordination Control protection system and its methods, are assisted by micro-capacitance sensor
Coordinated control of the control protective unit to distributed generation resource and load is adjusted, realizes that micro-capacitance sensor is pacified under grid-connected and off-network two states
Full stable operation.
In order to achieve the above objectives, solution of the invention is：A kind of micro-capacitance sensor rapid coordination Control protection system,
It is characterized in that, which includes micro electric network coordination control protective unit, communication network, master control distributed generation resource, distributed from control
Power supply, protection device；
The micro electric network coordination control protective unit connection points of common connection PCC current transformer and two sides mutual induction of voltage
Device acquires electric current and voltage, and controls the breaker tripping and closing of PCC point switch；
The micro electric network coordination control protective unit, master control distributed generation resource, from control distributed generation resource, protection dress
It sets and is connected with each other by communication network；
The micro electric network coordination control protective unit supports transformer substation case GOOSE and TCP towards general object
Modbus agreement uses GOOSE protocol communication with the master control distributed generation resource；
The micro electric network coordination control protective unit is filled with described from control distributed generation resource and the protection
It sets using GOOSE or TCP Modbus protocol communication；
The master control distributed generation resource and from control distributed generation resource include generator unit and corresponding controller；
The protection device is mounted at feeder line gate out switch, as feeder line protection and acquire the electricity of feeder line
Pressure, electric current, frequency, power information.
In above scheme, the master control distributed generation resource includes diesel engine, miniature gas burner, energy storage, described from control
Distributed generation resource includes photovoltaic power generation, wind-power electricity generation.
In above scheme, the communication network includes fiber optic Ethernet, Ethernet passive optical network EPON or the above class
The combination of the network of type.
In above scheme, the micro electric network coordination control protective unit has isolated island monitoring, dominant eigenvalues control, adjusts
Frequency modulation pressure, power smooth control, frequency and voltage emergency control, operational mode switching, overcurrent protection function.
The present invention also accordingly proposes a kind of control method of micro-capacitance sensor rapid coordination Control protection system, micro electric network coordination
The information that control protective unit passes through communications reception master control distributed generation resource, send from control distributed generation resource, protection device,
After software logic operation, control instruction by communication be sent to master control distributed generation resource, from control distributed generation resource, protection
Measuring device；
The master control distributed generation resource receives the control instruction from control distributed generation resource, implements to distributed electrical
Source power is adjusted, switch division or operational mode switch；
The protection device receives the control instruction, implements adaptively to switch switch division or definite value；
The protection device includes at least grid-connected definite value area and off-network definite value area, and it is adaptive to be able to carry out definite value
Switching, the grid-connected definite value area refer to that protection definite value is run according to micro-grid connection and adjust that the off-network definite value area refers to
Definite value is protected to adjust according to micro-capacitance sensor off-grid operation；The definite value, which adaptively switches, refers to protection device according to receiving simultaneously
Current definite value area is switched to grid-connected/off-network definite value area by net/off-network status information.
The dominant eigenvalues control refers to micro electric network coordination control protective unit according to current PCC power PcurWith mesh
Scale value Paim, control distributed generation resource is contributed and load switching, until realizing that PCC point performance number reaches target value Paim。
In the above method, the dominant eigenvalues control refers to according to △ P=Paim-Pcur, in order to adjustable
Distributed generation resource carries out generated output reset or flexible load switching, until meeting | △ P |<δset；
Wherein δsetIt is presetting power dead zone, prevents oscillation caused by frequently adjusting；
△ P is current PCC power PcurWith target value PaimDeviation.
In the above method, the described operational mode switching comprising it is planned it is grid-connected leave net pattern switching, steps are as follows：
1) micro electric network coordination control protective unit receive dispatching terminal it is planned it is grid-connected leave net pattern switching instruction after, differentiate
Whether PCC point current power is greater than P1, if it is greater than P1, controls dominant eigenvalues and is less than or equal to P1；The P1 is presetting
Value；
2) micro electric network coordination control protective unit sends instructions to master control distributed generation resource, and master control distributed generation resource receives finger
From PQ control mode switch to VSG control model after order；
3) micro electric network coordination control protective unit monitoring master control distributed power controller operates in VSG control model, passes through
After crossing default delay T, tripping PCC switch, pattern switching terminates.The value range of default delay T can be (1s, 60s).
In the above method, the definite value, which adaptively switches, to be included the following steps：
1) micro electric network coordination control protective unit judges current micro-capacitance sensor operating status according to the points of common connection position of the switch,
It is determined as being incorporated into the power networks at the time of apposition when switching, off-grid operation state is determined as when switch is in quartile, and according to differentiation result
By grid connection state position position；
2) grid connection state information is sent to protection device by communication by micro electric network coordination control protective unit；
3) after protection device receives grid connection state information, it is judged as when being incorporated into the power networks and switches to the definite value that is incorporated into the power networks
Area switches to off-grid operation definite value area when being judged as off-grid operation.
After adopting the above scheme, the beneficial effects of the invention are as follows：
It proposes a kind of comprising micro electric network coordination control protective unit, communication network, master control distributed generation resource distributed electrical
Source, from control distributed generation resource distributed generation resource, protection device control system, and use the substation towards general object
Event GOOSE and TCP Modbus agreement realizes the quick setting to the control model, control parameter of each distributed generation resource, together
When in conjunction with the quick control to load, can quickly inhibit simultaneously/off-network state switching or load, power supply switching to micro-capacitance sensor system
The impact that system generates, it is ensured that the safe and stable operation of micro-grid system.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of micro-capacitance sensor rapid coordination Control protection system provided in an embodiment of the present invention；
Fig. 2 is the grid-connected logic chart for leaving net mode switching method of plan type provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of definite value adaptive method for switching provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
A kind of micro-capacitance sensor rapid coordination Control protection system provided by the invention and its embodiment of the method
Fig. 1 is a kind of schematic diagram of micro-capacitance sensor rapid coordination Control protection system provided in an embodiment of the present invention；Wherein, scheme
Middle DG is distributed generation resource, and master control DG is master control distributed generation resource, is from control distributed generation resource from control DG, protecting and surveying device is protection
Measuring device.A kind of micro-capacitance sensor rapid coordination Control protection system, the system include micro electric network coordination control protective unit, communication
Network, master control distributed generation resource, from control distributed generation resource, protection device；The micro electric network coordination control protective unit
Points of common connection PCC current transformer and two sides voltage transformer are connected, electric current and voltage are acquired, and controls PCC point switch
Breaker tripping and closing；The micro electric network coordination control protective unit, master control distributed generation resource, from control distributed generation resource, protection dress
It sets and is connected with each other by communication network；The micro electric network coordination control protective unit supports substation's thing towards general object
Part GOOSE and TCP Modbus agreement uses GOOSE protocol communication with the master control distributed generation resource；The micro-capacitance sensor
Coordinated control protective device uses GOOSE or TCP from control distributed generation resource and the protection device with described
Modbus protocol communication；The master control distributed generation resource and from control distributed generation resource include generator unit and corresponding control
Device；The protection device is mounted at feeder line gate out switch, as feeder line protection and acquire the voltage of feeder line, electricity
Stream, frequency, power information.Master control distributed generation resource includes diesel engine, miniature gas burner, energy storage, described from control distributed electrical
Source includes photovoltaic power generation, wind-power electricity generation.Communication network includes fiber optic Ethernet, Ethernet passive optical network EPON or the above type
Network combination.Micro electric network coordination control protective unit has isolated island monitoring, dominant eigenvalues control, frequency modulation and voltage modulation, power
Smooth control, frequency and voltage emergency control, operational mode switching, overcurrent protection function.
A kind of micro-capacitance sensor rapid coordination provided by the invention controls guard method embodiment
Micro electric network coordination control protective unit has isolated island monitoring, dominant eigenvalues control, frequency modulation and voltage modulation, power smooth control
System, frequency and voltage emergency control, operational mode switching, overcurrent protection function；Protection device includes at least grid-connected definite value area
With off-network definite value area, and it is able to carry out definite value and adaptively switches, grid-connected definite value area definite value runs according to micro-grid connection and adjusts, from
Net definite value area's definite value is adjusted according to micro-capacitance sensor off-grid operation；Master control distributed generation resource includes but is not limited to diesel engine, miniature combustion
Mechanism of qi, energy storage include but is not limited to photovoltaic power generation, wind-power electricity generation from control distributed generation resource.
Dominant eigenvalues control refers to that micro electric network coordination control protective unit control distributed generation resource and load to get in touch with
Linear heat generation rate according to dispatching down distributing dominant eigenvalues instruction target value PaimToward grid transmission, it is assumed that PaimIt is that micro-capacitance sensor is past for timing
Public electric wire net conveys electricity, PaimElectricity is absorbed from public electric wire net when being negative for micro-capacitance sensor.Steps are as follows：
1) △ P=P is calculatedaim-Pcur
If | △ P |>δset, enter step 3)；
Conversely, terminating process.
If 2) △ P>0, priority acccess control energy storage increases discharge power and either reduces charge power, if Pbess.cur+ △ P
It is then P by communication setting energy storage power less than energy storage maximum discharge powerbess.cur2)+△ P, enters step；If energy storage has reached
To maximum discharge power, then the distributed generation resource additional issue excision living for having additional issue ability by preset two priority classes is non-heavy
Load is wanted, is entered step 1).
If 3) △ P<0, priority acccess control energy storage increases charge power and either reduces discharge power, if | Pbess.cur- △ P | it is small
It is then P by communication setting energy storage power in energy storage maximum charge powerbess.cur2)-△ P, enters step；If energy storage has reached
Maximum charge power then subtracts hair by preset two priority classes distributed generation resource or restores the load interrupted, enters step
1)。
Above-mentioned δsetFor presetting power dead zone, 3%~5%P of valueaim, prevent oscillation caused by frequently adjusting；
Pbess.curRefer to energy storage present output power.
Operational mode switching comprising it is planned it is grid-connected leave net pattern switching, Fig. 2 is plan provided in an embodiment of the present invention
The grid-connected logic chart for leaving net mode switching method of type, steps are as follows：
1) micro electric network coordination control protective unit receive dispatching terminal it is planned it is grid-connected leave net pattern switching instruction after, differentiate
Whether PCC point current power is greater than P1, if it is greater than P1, controls dominant eigenvalues and is less than or equal to P1.P1 is presetting value, is taken
Value 5%Ppcc.norm, Ppcc.normFor interconnection transmission power rated value.
2) micro electric network coordination control protective unit sends instructions to master control distributed generation resource, and master control distributed generation resource receives finger
From PQ control mode switch to VSG control model after order；
3) micro electric network coordination control protective unit monitoring master control distributed power controller operates in VSG control model, prolongs
When 5s after, tripping PCC switch, pattern switching terminates.
Fig. 3 is the schematic diagram of definite value adaptive method for switching provided in an embodiment of the present invention.Definite value adaptively switches
Following steps：
1) micro electric network coordination control protective unit judges current micro-capacitance sensor operating status according to the points of common connection position of the switch,
When switch is determined as being incorporated into the power networks at the time of apposition, it is 0 that grid connection state, which sets number, is determined as off-grid operation shape when switch is in quartile
State, it is 1 that grid connection state, which sets number,；
2) grid connection state information is sent to protection dress by GOOSE communication by micro electric network coordination control protective unit
It sets；
3) after protection device receives grid connection state information, the definite value area that is incorporated into the power networks is switched to when being judged as 0, is judged
It is switched to when being 1 grid-connected from row definite value area.
Claims (8)
1. a kind of micro-capacitance sensor rapid coordination Control protection system, which is characterized in that the system includes micro electric network coordination control protection
Device, communication network, master control distributed generation resource, from control distributed generation resource, protection device；
The micro electric network coordination control protective unit connection points of common connection PCC current transformer and two sides voltage transformer,
Electric current and voltage are acquired, and controls the breaker tripping and closing of PCC point switch；
It is the micro electric network coordination control protective unit, master control distributed generation resource, logical from control distributed generation resource, protection device
Cross communication network interconnection；
The micro electric network coordination control protective unit supports transformer substation case GOOSE and the TCP Modbus towards general object
Agreement uses GOOSE protocol communication with the master control distributed generation resource；
The micro electric network coordination control protective unit is adopted with described from control distributed generation resource and the protection device
With GOOSE or TCP Modbus protocol communication；
The master control distributed generation resource and from control distributed generation resource include generator unit and corresponding controller；
The protection device is mounted at feeder line gate out switch, as feeder line protection and acquire the voltage of feeder line, electricity
Stream, frequency, power information.
2. a kind of micro-capacitance sensor rapid coordination Control protection system according to claim 1, which is characterized in that the master control
Distributed generation resource includes diesel engine, miniature gas burner, energy storage, it is described from control distributed generation resource include photovoltaic power generation, wind-force hair
Electricity.
3. a kind of micro-capacitance sensor rapid coordination Control protection system according to claim 1, which is characterized in that the communication
Network includes the combination of fiber optic Ethernet, Ethernet passive optical network EPON or above type of network.
4. a kind of micro-capacitance sensor rapid coordination Control protection system according to claim 1, which is characterized in that micro- electricity
Net coordinated control protective device has isolated island monitoring, dominant eigenvalues control, frequency modulation and voltage modulation, power smooth control, voltage to frequency
Emergent control, operational mode switching, overcurrent protection function.
5. a kind of control method of micro-capacitance sensor rapid coordination Control protection system according to any one of claims 1 to 4,
Be characterized in that, micro electric network coordination control protective unit by communications reception master control distributed generation resource, from control distributed generation resource, protection
The information sent in measuring device, after software logic operation, control instruction by communication be sent to master control distributed generation resource,
From control distributed generation resource, protection device；
The master control distributed generation resource receives the control instruction from control distributed generation resource, implements to distributed generation resource function
Rate is adjusted, switch division or operational mode switch；
The protection device receives the control instruction, implements adaptively to switch switch division or definite value；
The protection device includes at least grid-connected definite value area and off-network definite value area, and is able to carry out definite value and adaptively cuts
It changes, the grid-connected definite value area refers to that protection definite value is run according to micro-grid connection and adjust that the off-network definite value area refers to guarantor
Definite value is protected to adjust according to micro-capacitance sensor off-grid operation；The definite value, which adaptively switches, refers to protection device according to receiving simultaneously
Current definite value area is switched to grid-connected/off-network definite value area by net/off-network status information.
The dominant eigenvalues control refers to micro electric network coordination control protective unit according to current PCC power PcurWith target value
Paim, control distributed generation resource is contributed and load switching, until realizing that PCC point performance number reaches target value Paim。
6. a kind of control method of micro-capacitance sensor rapid coordination Control protection system as claimed in claim 5, which is characterized in that institute
The dominant eigenvalues control stated refers to according to △ P=Paim-Pcur, generated output is carried out to adjustable distributed generation resource in order
Reset or flexible load switching, until meeting | △ P |<δset；
Wherein δsetIt is presetting power dead zone, prevents oscillation caused by frequently adjusting；
△ P is current PCC power PcurWith target value PaimDeviation.
7. a kind of control method of micro-capacitance sensor rapid coordination Control protection system as claimed in claim 5, which is characterized in that institute
State operational mode switching comprising it is planned it is grid-connected leave net pattern switching, steps are as follows：
1) micro electric network coordination control protective unit receive dispatching terminal it is planned it is grid-connected leave net pattern switching instruction after, differentiate PCC
Whether point current power is greater than P1, if it is greater than P1, controls dominant eigenvalues and is less than or equal to P1；The P1 is presetting
Value；
2) micro electric network coordination control protective unit sends instructions to master control distributed generation resource, after master control distributed generation resource receives instruction
From PQ control mode switch to VSG control model；
3) micro electric network coordination control protective unit monitoring master control distributed power controller operates in VSG control model, by pre-
If being delayed after T, tripping PCC switch, pattern switching terminates.
8. a kind of control method of micro-capacitance sensor rapid coordination Control protection system as claimed in claim 5, which is characterized in that institute
The definite value stated, which adaptively switches, to be included the following steps：
1) micro electric network coordination control protective unit judges current micro-capacitance sensor operating status according to the points of common connection position of the switch, when opening
Pass is determined as being incorporated into the power networks at the time of apposition, off-grid operation state is determined as when switch is in quartile, and will simultaneously according to differentiation result
Net state position position；
2) grid connection state information is sent to protection device by communication by micro electric network coordination control protective unit；
3) after protection device receives grid connection state information, it is judged as and switches to the definite value area that is incorporated into the power networks when being incorporated into the power networks,
Off-grid operation definite value area is switched to when being judged as off-grid operation.
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| CN201810735697.5A CN108879766A (en) | 2018-07-06 | 2018-07-06 | A kind of micro-capacitance sensor rapid coordination Control protection system and its method |
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| CN109494800A (en) * | 2018-12-19 | 2019-03-19 | 上海电气分布式能源科技有限公司 | The control method and system that grid-connected and off-network for micro-capacitance sensor mutually switches |
| CN109581933A (en) * | 2018-12-20 | 2019-04-05 | 天津瑞能电气有限公司 | A kind of distributed micro-capacitance sensor protection system based on the communication of high speed real-time ethernet |
| CN110784007A (en) * | 2019-10-21 | 2020-02-11 | 南京南瑞继保电气有限公司 | Main and standby machine redundancy method of micro-grid coordination control device |
| CN110854916A (en) * | 2019-12-06 | 2020-02-28 | 许继集团有限公司 | Energy balance control method and device based on user energy storage |
| TWI773450B (en) * | 2020-08-05 | 2022-08-01 | 日商三菱電機股份有限公司 | Decentralized power management device |
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