CN105896491A - Multi-level wheel-stage interlocking island protection method applicable to large-scale new energy power station - Google Patents
Multi-level wheel-stage interlocking island protection method applicable to large-scale new energy power station Download PDFInfo
- Publication number
- CN105896491A CN105896491A CN201610383736.0A CN201610383736A CN105896491A CN 105896491 A CN105896491 A CN 105896491A CN 201610383736 A CN201610383736 A CN 201610383736A CN 105896491 A CN105896491 A CN 105896491A
- Authority
- CN
- China
- Prior art keywords
- level
- power station
- new energy
- energy power
- wheel
- 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.)
- Granted
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
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a multi-level wheel-stage interlocking island protection method applicable to a large-scale new energy power station. The multi-level wheel-stage interlocking island protection method comprises the following steps: (1) determining the constant value of island protection characteristic quantity according to the stability domain degree of the large-scale new energy power station system, and stably dividing the system into a plurality of levels; (2) generating corresponding logic expression according to the type of each interval equipment of the large-scale new energy power station and exit matrix configuration; (3) generating wheel-stage interlocking logic; and (4) identifying stable levels of the system after an island phenomenon occurs by calculating a characteristic variable value in real time, and acting on an exit matrix according to a wheel-stage interlocking logic distinguishing result so as to guarantee the rapidity and reliability of exit tripping. The method is applied to a wheel-stage interlocking logic method, the problem of overcutting appearing in the island protection process of the large-scale new energy power station is prevented, the method has higher automation level, the operation process can be simplified, the operation and maintenance costs are reduced, the reliability of operation is improved, and the method has extensive applicability at the same time.
Description
Technical field
The present invention relates to a kind of multilamellar wheel level interlocking isolated island guard method being applicable to extensive new energy power station, belong to new forms of energy skill
Art field.
Background technology
New energy power station system is compared with tradition electrical network power station system, and scale is less, for adapting to each demand from different places, past
Toward comprising multiple power equipment, the most grid-connected switch, energy storage inverter, distributed power source, load etc..When major network is due to specific
When reason is stopped power supply, new energy power station i.e. defines island phenomenon with the power load of surrounding, sending out of unplanned property island phenomenon
Raw meeting bring unpredictable harm to system equipment and related personnel.The new energy power station built at present have generating capacity relatively big,
The features such as synchronizing mode energy storage inverter configuration complicated, multiple, after island phenomenon occurs, extensive new energy power station multiple
Compound mode, defines multiple running status, and under various states, the stability characteristic (quality) of system is also not quite similar, and existing isolated island is protected
Method often causes the over-cutting of load and generating equipment, expands power failure range, reduces the utilization rate of new forms of energy.Cause
This finds a kind of effective isolated island guard method, under each method of operation of extensive new energy power station, and all can quickly, reliably
Tripping operation outlet, simultaneously preventing and treating protection during over-cutting, access network system effective for new forms of energy has important
Meaning.
The wheel level control technology of conventional electric power system is typically based on the characteristic quantities such as voltage, the amplitude of frequency, phase place, slippage and sentences
Not, when island phenomenon causes characteristic quantity to exceed the scope of permission, and after meeting certain dynamic condition, it is believed that system enters unstability
State, so trigger protection control device system is controlled.Extensive new energy power station contains substantial amounts of distributed energy,
Distributed energy has the natural characteristics such as instability, intermittence, randomness so that the stability characteristic (quality) of system is in a bigger district
Interior floating.New energy power station system is also relevant to geographical position, the new energy resources system of different regions, because accessing distributed energy
The quantity in source, the difference of characteristic, and in dynamic characteristic, also have larger difference, the voltage after island phenomenon generation, the spy of frequency
Property is likely to difference.
Realize the action message of the isolated island protection of extensive new energy power station system, need Intelligent Recognition new energy power station current
Operational mode, carries out the control method of the many wheels of layering, Real-time Collection site, distributed power source, energy-storage units, charge circuit
Information, carries out system stability differentiation.After island phenomenon causes system unstability, according to strategy set in advance, alignment system institute
The stable level at place, utilizes wheel level interlocking techniques, and a series of switches of policy definition jumped by connection, it is achieved quickly, trip out reliably
Mouthful, it is achieved the reequilibrate of system, the over-cutting during preventing and treating protection simultaneously.
Therefore, need a kind of new technical scheme to solve the problems referred to above.
Summary of the invention
It is an object of the invention to provide a kind of multilamellar wheel level interlocking isolated island guard method being applicable to extensive new energy power station, to divide
The stable grade of model split micro-grid system of layer, realizes the reequilibrate of system taking turns the technology of level interlocking, it is achieved quickly, can
The tripping operation outlet leaned on, the over-cutting during preventing and treating protection.
For achieving the above object, the present invention can adopt the following technical scheme that
A kind of multilamellar wheel level interlocking isolated island guard method being applicable to extensive new energy power station, comprises the following steps:
(1), according to the stable region degree of extensive new energy power station system, the definite value of isolated island protection feature amount is determined, system is steady
Surely multiple level it is divided into；
(2), according to the device type at each interval of extensive new energy power station, and outlet matrix configuration, generate corresponding
Logical expression；
(3) wheel level interlock logic, is generated；
(4), by calculating characteristic variable value in real time, the stable level of system after identification island phenomenon generation, according to wheel level interlocking
Logic discrimination result, acts on outlet matrix: if wheel level interlock logic differentiates that result is that real movement is made, then act on corresponding level
Outlet matrix；If wheel level interlock logic differentiates that result is feinting deception, then the outlet matrix of locking correspondence level.
Further, in described step (1), level divides and includes: according to generating equipment capacity in extensive new energy power station,
Load capacity and the annexation with power distribution network, determine the stable region degree of native system, according in extensive new energy power station system
The definite value of isolated island protection feature amount, divides and multiple stablizes level LEVEL (n).
Further, in described step (2), generate logical expression and include: according to extensive new energy power station total system frame
Structure, the device type defining each interval includes and site switch SW (n), points of common connection switch SWT (n), bus BUS (n),
Controllable burden and on and off switch OP (n)；According to same level division principle, each spacing devices is collected under corresponding level,
Generate each level logical device and express formula, LEVEL (n): SW (i), BUS (j), OP (k) ... }.
Further, in described step (3), wheel level interlock logic includes: define each grade actuating signal ACT (n) of taking turns, and divides
Each wheel is two-step evolution, and rear one takes turns the logic discrimination of level starts after previous round level action completes；Definition wheel level interlocking signal
LOCK (n), monitors decline and the process of rise of characteristic quantity in real time, calculates steepness DT of changing features amount, when detection steepness side
To change, and after meeting two-stage characteristic quantity transposition section, locking next stage round cut immediately and export matrix, logical expression accordingly
Formula is, LOCK (n): (DT > 0) &LEVEL (n)；Epicycle level interlock logic expression formula is, ACT (n): ACT (n-1) &
NOT(LOCK(n))。
Further, in described step (4), by calculating characteristic variable value in real time, quickly identify system after island phenomenon generation
Stable level, road wheel level interlock logic of going forward side by side differentiate；Including using directly exported mode, or based on high-speed traffic GOOSE
The mode of mechanism, prevents the mistake during isolated island protection from cutting problem.
The beneficial effects of the present invention is:
The protection of extensive new energy power station isolated island is divided into multilamellar step cone level course of action by the present invention, by wheel between each layer wheel level
Level interlock logic expression formula realizes the interlocking of adjacent level, and the mistake occurred during preventing the protection of extensive new energy power station isolated island is cut
Problem, has higher automatization level, it is possible to simplify complicated operating process, reduces operation and maintenance cost, adds
The reliability of operation.Owing to using which kind of characteristic variable to depend on concrete application demand, therefore the method possesses wide applicability,
The most wide application prospect is had in extensive new energy power station.
Accompanying drawing explanation
Fig. 1 takes turns the logical schematic of level interlocking with the multilamellar of the frequency amount of being characterized.
Fig. 2 interlocks, with the wheel level of the frequency amount of being characterized, the schematic diagram avoiding cutting.
Fig. 3 takes turns the logical schematic of level interlocking with the multilamellar of the voltage amount of being characterized.
Detailed description of the invention
Below in conjunction with the accompanying drawings and specific embodiment, it is further elucidated with the present invention, it should be understood that these embodiments are merely to illustrate the present invention
Rather than restriction the scope of the present invention, after having read the present invention, those skilled in the art's shape various of equal value to the present invention
The amendment of formula all falls within the application claims limited range.
The multilamellar wheel level interlocking isolated island guard method being applicable to extensive new energy power station of the present invention specifically includes following step
Rapid:
(1) according to generating equipment capacity, load capacity and the annexation with power distribution network in extensive new energy power station, determine
The stable region degree of native system, according to the definite value in extensive new energy power station system isolated island protection feature amount, divides multiple stabilized zone
Level LEVEL (n).
(2) according to extensive new energy power station overall system architecture, the device type at each interval, such as also site switch are defined
SW (n), points of common connection switch SWT (n), bus BUS (n), controllable burden and on and off switch OP (n)；According to same level
Division principle, collects each spacing devices under corresponding level, generates each level logical device and expresses formula, LEVEL (n):
SW (i), BUS (j), OP (k) ... }.
(3) defining and each take turns grade actuating signal ACT (n), divide and each take turns as two-step evolution, rear one logic discrimination taking turns level must be
Previous round level action starts after completing；Definition wheel level interlocking signal LOCK (n), the real-time decline monitoring characteristic quantity and rise
Process, calculates steepness DT of changing features amount, when detection steepness direction changes, and after meeting two-stage characteristic quantity transposition section,
Locking next stage round cut immediately and export matrix accordingly, logical expression is, LOCK (n): (DT > 0) &LEVEL (n).This
Wheel level interlock logic expression formula is, ACT (n): ACT (n-1) &NOT (LOCK (n)).
(4) by calculating characteristic variable value in real time, the stable level of system, road wheel level of going forward side by side after quickly identification island phenomenon occurs
Interlock logic differentiates.If wheel level interlock logic differentiates that result is action, then act on the outlet matrix of corresponding level；If wheel
Level interlock logic differentiates that result is action, then the outlet matrix of locking correspondence level.Typically can use directly exported mode, or
Mode based on high-speed traffic GOOSE mechanism, it is ensured that the rapidity of outlet tripping operation, reliability, during preventing isolated island protection
Mistake cut problem.
In the present embodiment, shown in Fig. 1 for a frequency amount of being characterized, add two independent stratum level structures with four interlocking levels and draw
The extensive new energy power station system stability structure divided, below as a example by this new energy power station, illustrates that multilamellar wheel level interlocking isolated island is protected
The generation of maintaining method logic, differentiation process.
According to technical scheme steps, (1) is according to the stable region degree of extensive new energy power station system, and isolated island protection frequency is special
The definite value of the amount of levying, divides multiple four and stablizes level, i.e. LEVEL (1): [F1, F0], LEVEL (2): [F2, F1], LEVEL (3):
[F3, F2], LEVEL (4): [F4, F3].
(2) according to extensive new energy power station overall system architecture, defining the device type at each interval, such as this is energy electricity
Station has and site switchs 3, then define SW (1), SW (2), SW (3)；Points of common connection switch 2, then define SWT (1),
SWT(2)；Two groups of bus BUS (1), BUS (2), controllable burden and on and off switch 5, then define OP (1), OP (2) ...,
OP(5).Outlet matrix configuration according to each level, collects each spacing devices under corresponding level, generates each level logic and set
Standby expression formula, such as LEVEL (1): { SW (1), BUS (2), SWT (1), OP (4) }, LEVEL (2): BUS (2), OP (1),
OP (2), OP (5) }, LEVEL (3): { SW (2), BUS (2), OP (3), OP (4) } ..., LEVEL (5): BUS (2),
SWT (2), OP (1), OP (2), OP (5) }.
(3) generating wheel level interlock logic, characteristic quantity is frequency, then the steepness of changing features amount is defined as DT (F), then ground floor
Level interlocking signal expression formula is, LOCK (1): (DT (F) > 0) (1), and the first level interlock logic expression formula is,
ACT (1): ACT (0) &NOT (LOCK (1))；Second level interlocking signal expression formula is, LOCK (2): (DT (F) > 0)
LEVEL (2), the second level interlock logic expression formula is, ACT (2): ACT (1) (LOCK (2))；3rd, the 4th layer
Level is by that analogy.
(4) characteristic variable is calculated in real time, i.e. system frequency value F, it is assumed that frequency value of calculation F:[F2, F1], according to step (1)
Carrying out level division result, after quickly identifying island phenomenon generation, system belongs to stable level LEVEL (2), through the time of Tf2
Broadening, frequency F does not drop to below F2, is i.e. introduced into the transposition section of the second level, so LOCK (2) is false, patrols
It is true for collecting interlocking expression formula ACT (2), then isolated island protective effect is in the outlet matrix of the first level, and sphere of action is LEVEL (2):
{ BUS (2), OP (1), OP (2), OP (5) }.
(5) assume that new energy power station is taken turns after connection cuts second, system frequency bottom out, but frequency values have fallen to F2 with
Under, i.e. F:[F2, F1], as in figure 2 it is shown, carry out level division result according to step (1), quickly identify that now system belongs to
In stable level LEVEL (3), frequency F drops to below F2, i.e. enters the transposition section of the second level, but frequency starts
Go up, i.e. DT (F) > 0, so LOCK (3): (DT (F) > 0) &LEVEL (3) is true, logical interlock expression formula ACT (3):
ACT (2) (LOCK (3)) is false, then the outlet matrix of locking third layer level, it is achieved that after the second level isolated island protection
Prevented the problem cut.
Above example is using frequency as characteristic quantity, and Fig. 3 is to describe typical case's extensive new forms of energy electricity using voltage as characteristic quantity
The rock-steady structure of system of standing, implementation is in like manner.
Above example is only the explanation to technical solution of the present invention, and protection scope of the present invention is not limited to this, any ripe
Knowing amendment or equivalent that the specific embodiment of the present invention is carried out by the personnel of this specialty, the right that should be included in the present invention is wanted
Within the scope of asking.
Claims (5)
1. being applicable to a multilamellar wheel level interlocking isolated island guard method for extensive new energy power station, its feature exists
In, comprise the following steps:
(1), according to the stable region degree of extensive new energy power station system, the definite value of isolated island protection feature amount is determined,
System stability is divided into multiple level；
(2), according to the device type at each interval of extensive new energy power station, and outlet matrix configuration,
Generate corresponding logical expression；
(3) wheel level interlock logic, is generated；
(4), by calculating characteristic variable value in real time, the stable level of system, root after identification island phenomenon generation
Differentiate result according to wheel level interlock logic, act on outlet matrix: if wheel level interlock logic differentiates that result is real movement
Make, then act on the outlet matrix of corresponding level；If wheel level interlock logic differentiates that result is feinting deception, then close
The outlet matrix of the corresponding level of lock.
The multilamellar wheel level interlocking isolated island being applicable to extensive new energy power station the most according to claim 1 is protected
Maintaining method, it is characterised in that in described step (1), level divides and includes: according to extensive new forms of energy electricity
Generating equipment capacity, load capacity and the annexation with power distribution network in standing, determine the stable region degree of native system,
According to the definite value in extensive new energy power station system isolated island protection feature amount, divide and multiple stablize level
LEVEL(n)。
The multilamellar wheel level interlocking isolated island being applicable to extensive new energy power station the most according to claim 1 is protected
Maintaining method, it is characterised in that in described step (2), generates logical expression and includes: according to extensive new
Energy power station overall system architecture, the device type defining each interval includes and site switch SW (n), public
Junction point switch SWT (n), bus BUS (n), controllable burden and on and off switch OP (n)；According to same level
Division principle, collects each spacing devices under corresponding level, generates each level logical device and expresses formula,
LEVEL (n): SW (i), BUS (j), OP (k) ... }.
The multilamellar wheel level interlocking isolated island being applicable to extensive new energy power station the most according to claim 1 is protected
Maintaining method, it is characterised in that in described step (3), wheel level interlock logic includes: defines and each takes turns a grade action
Signal ACT (n), divides and each takes turns as two-step evolution, and rear one logic discrimination taking turns level completes in previous round level action
Rear beginning；Definition wheel level interlocking signal LOCK (n), monitors decline and the process of rise of characteristic quantity in real time,
Calculate steepness DT of changing features amount, when detection steepness direction changes, and meet the two-stage characteristic quantity zone of intersection
After between, locking next stage round cut immediately and export matrix accordingly, logical expression is, LOCK (n): (DT > 0)
&LEVEL(n)；Epicycle level interlock logic expression formula is, ACT (n): ACT (n-1) &NOT (LOCK (n)).
The multilamellar wheel level interlocking isolated island being applicable to extensive new energy power station the most according to claim 1 is protected
Maintaining method, it is characterised in that in described step (4), by calculating characteristic variable value in real time, quickly identifies
The stable level of system after island phenomenon generation, road wheel level interlock logic of going forward side by side differentiates；Including using direct export
Mode, or mode based on high-speed traffic GOOSE mechanism, prevent the mistake during isolated island protection from cutting problem.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610383736.0A CN105896491B (en) | 2016-06-02 | 2016-06-02 | A kind of multilayer wheel grade suitable for extensive new energy power station interlocks isolated island guard method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610383736.0A CN105896491B (en) | 2016-06-02 | 2016-06-02 | A kind of multilayer wheel grade suitable for extensive new energy power station interlocks isolated island guard method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105896491A true CN105896491A (en) | 2016-08-24 |
| CN105896491B CN105896491B (en) | 2018-11-09 |
Family
ID=56709089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610383736.0A Active CN105896491B (en) | 2016-06-02 | 2016-06-02 | A kind of multilayer wheel grade suitable for extensive new energy power station interlocks isolated island guard method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105896491B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130058139A1 (en) * | 2011-09-05 | 2013-03-07 | Young Sang BAE | Energy generation system and its anti islanding protecting method |
| CN103311906A (en) * | 2013-03-19 | 2013-09-18 | 山东理工大学 | Switch displacement island detection and direct-trip island protection method based on wide area information |
| CN104242270A (en) * | 2014-09-18 | 2014-12-24 | 南京南瑞继保电气有限公司 | Passive anti-island protection maloperation preventing method |
| CN104319871A (en) * | 2014-09-30 | 2015-01-28 | 国家电网公司 | Transformer station domain island protection and backup automatic switching integrated method |
-
2016
- 2016-06-02 CN CN201610383736.0A patent/CN105896491B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130058139A1 (en) * | 2011-09-05 | 2013-03-07 | Young Sang BAE | Energy generation system and its anti islanding protecting method |
| CN103311906A (en) * | 2013-03-19 | 2013-09-18 | 山东理工大学 | Switch displacement island detection and direct-trip island protection method based on wide area information |
| CN104242270A (en) * | 2014-09-18 | 2014-12-24 | 南京南瑞继保电气有限公司 | Passive anti-island protection maloperation preventing method |
| CN104319871A (en) * | 2014-09-30 | 2015-01-28 | 国家电网公司 | Transformer station domain island protection and backup automatic switching integrated method |
Non-Patent Citations (1)
| Title |
|---|
| 樊淑娴等: "载波闭锁式孤岛保护方案", 《电力***保护与控制》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105896491B (en) | 2018-11-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103400302B (en) | A kind of wind power base cascading failure risk perceptions method for early warning | |
| CN109687438B (en) | Power grid fragile line identification method considering high-speed rail impact load effect | |
| Li et al. | Assessment method and indexes of operating states classification for distribution system with distributed generations | |
| CN109659936A (en) | A kind of smart grid Dispatching Control System failure method of disposal and system | |
| CN107907759A (en) | The electricity monitoring system and method for power equipment | |
| Gang et al. | Automatic identification of transmission sections based on complex network theory | |
| CN106841854A (en) | Power equipment safety monitoring method and system | |
| CN108090674A (en) | The risk assessment of the area power grid method of operation and aid decision-making method and system | |
| Hu et al. | Dynamic lightning protection method of electric power systems based on the large data characteristics | |
| Einfalt et al. | Efficient utilisation of existing grid infrastructure empowering smart communities | |
| Al Karim et al. | A distributed machine learning approach for the secondary voltage control of an Islanded micro-grid | |
| Li et al. | Optimization method of skeleton network partitioning scheme considering resilience active improvement in power system restoration after typhoon passes through | |
| Zare-Bahramabadi et al. | An MILP model for switch, DG, and tie line placement to improve distribution grid reliability | |
| Wang et al. | Using multiple DGs for distribution system service restoration after extreme events | |
| CN105701288B (en) | The simulation of power grid complexity successive failure and emulation mode under the conditions of a kind of extreme Hazard Meteorological | |
| Yang et al. | A novel partitioning method for the power grid restoration considering the support of multiple LCC-HVDC systems | |
| Zhang et al. | Intentional islanding method based on community detection for distribution networks | |
| CN105896491A (en) | Multi-level wheel-stage interlocking island protection method applicable to large-scale new energy power station | |
| CN110011345A (en) | A kind of DC transmission system locking failure send end cutting machine method and device | |
| CN104156614A (en) | Electric-system risk assessment method based on static security region | |
| Deb et al. | An intelligent load shedding scheme for the micro-grid in shipboard power system using probabilistic methods | |
| Qu et al. | A Globally Cooperative Recovery Strategy for Cyber-Physical Power System Based on Node Importance | |
| Yang et al. | Island division and multi-objective network reconstruction considering power flow entropy | |
| Khediri et al. | Intelligent decision support system for electric power restoration | |
| Liu et al. | Importance sampling based decision trees for security assessment and the corresponding preventive control schemes: The Danish case study |
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 |