CN104682398B - A kind of independent micro-grid electric power system power supply reliability load cutting method - Google Patents
A kind of independent micro-grid electric power system power supply reliability load cutting method Download PDFInfo
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- CN104682398B CN104682398B CN201510136905.6A CN201510136905A CN104682398B CN 104682398 B CN104682398 B CN 104682398B CN 201510136905 A CN201510136905 A CN 201510136905A CN 104682398 B CN104682398 B CN 104682398B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
Abstract
The invention provides a kind of independent micro-grid electric power system power supply reliability load cutting method.Independent microgrid system is divided into different feeder zone；Master control power supply uses concentrates access way, is connected from different feeder zone through transformer；Independent microgrid system also include renewable energy power generation machine and or energy storage device, be arranged on high voltage side of transformer be connected bus on or be arranged on inside feeder zone；Determine the interruptible load in independent micro-grid electric power system, and from small to large and or cut down table according to significance level sequential build load from lightweight to heavyweight according to burden with power amount.In the case of regenerative resource has randomness, intermittent feature, in independent microgrid system planning and designing, regenerative resource can be made full use of, ensure that the power supply reliability of system simultaneously.
Description
Technical field
The present invention relates to a kind of independent micro-grid electric power system power supply reliability load cutting method, particularly relate to
A kind of independent microgrid system being applicable to based on trend balances can be powered by property load cutting method.
Background technology
Along with the continuous growth of energy demand, greenhouse effects are further obvious, and utilize wind energy, solar energy etc. can
Renewable source of energy generation technology rapidly becomes the current reply energy and the important means of environmental crisis.Independent micro-grid system
Polytype distributed generation unit can be combined by system, effectively realizes various energy resources complementary, improves
The energy utilization rate of whole system and power supply reliability.In remote and Island, independent microgrid system is to solve
Certainly one of effective means of its powerup issue.
Regenerative resource often has randomness, intermittent feature.In independent microgrid system planning and designing
In, while making full use of regenerative resource, how to ensure that the power supply reliability of system is the pass needing to pay close attention to
One of key problem.
But, the reliability of current independent microgrid system is basic only around the generating in autonomous system-negative in powering
Lotus capacitance balance carries out the method for supplying power to after reliability assessment, it is impossible to meet the planning and designing need of independent micro-grid
Ask.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of power supply reliability more preferable independent micro-grid electric power system
Power supply reliability load cutting method.
Along with the increase of independent microgrid system scale, it should also be taken into account that the shadow of grid structure in reliability assessment
Ring, in existing independent microgrid system Reliability Evaluation, do not consider the impact that equipment fault brings,
Owing to grid structure is complicated, load bus is more, middle pressure independent microgrid system is structurally closer to containing distribution
The distribution system of formula power supply.But except for the difference that, the distribution system containing distributed power source is incorporated into the power networks for a long time, and
Independent microgrid system is in off-network state the most all the time, needs the power supply fully relying in microgrid to realize electric power and puts down
Weighing apparatus.The voltage problem that this feature determines middle pressure independent microgrid system is more prominent than distribution system, due to
In distribution line higher resistive, therefore voltage is simultaneously by active balance and the double influence of reactive balance.And
In this, existing method the most only considers intrasystem active balance, have ignored in system reactive balance and
Its voltage problem brought.
The technical solution used in the present invention is as follows: a kind of independent micro-grid electric power system power supply reliability load is cut
Subtract method, it is characterised in that independent microgrid system is divided into different feeder zone；Master control power supply uses
Concentrate access way, be connected from different feeder zone through transformer；Independent microgrid system also includes renewable
Energy generator and or energy storage device, be arranged on high voltage side of transformer be connected bus on or be arranged on feeder line district
Inside territory；Determine the interruptible load in independent micro-grid electric power system, and according to burden with power amount from small to large
With or cut down table according to significance level sequential build load from lightweight to heavyweight.
As preferably, when energy storage device is as master control power supply, if there is power shortage, opening one and awaiting orders
The non-renewable energy resources generator of state makes up this vacancy；When non-renewable energy resources generator is as master control electricity
During source, if there is power shortage, preferentially call meritorious, the reactive energy of energy storage device to make up this vacancy,
When energy storage device is sufficient to compensate for vacancy, reselection opens the non-renewable energy resources generating of an armed state
Machine makes up this vacancy；If in system, all power supplys have been in full hair-like state the most, but still suffer from power shortage,
Now need to call load cutting method.
As preferably, described load cutting method also includes, when carrying out load and cutting down, cuts with described load
Subtracting table is foundation, and the most meritorious and load or burden without work of excision interruptible load point, excises each time
Meritorious total load and idle total load to current system are updated afterwards, rejudge master control source nominal and hold
Whether amount can meet the system total load after renewal, then can cut down termination, system resumes power, record by load
The excision total amount of lower interruptible load, otherwise continue executing with load cut down strategy, until meet described judgement or
Till all interruptible loads are the most cut.
As preferably, described load cutting method also includes, if still can not expire after excising all interruptible loads
The described basis for estimation of foot, in system, all load point all have a power failure.
As preferably, also include automatic safety device, be arranged on high voltage side of transformer and feeder zone entrance,
The connection of fault zone and other region of electric power system is automatically cut off when fault；When element any in region
When breaking down, rapid action is made whole feeder zone isolate by corresponding automatic safety device.
As preferably, independent micro-grid electric power system is divided into different feeder zone, can be again in reading system
Power-supply device operational factor and the events such as raw energy generator group, non-renewable energy resources generating set and energy storage device
Barrier parameter, and the basic Power Flow Information of feeder zone and fault message；According to all power-supply devices and feeder line
The fault parameter in region, carries out moment state sampling to described power-supply device and feeder zone, obtains described electricity
The state change cyclic sequence of source device and feeder zone；By opening up of described state change cyclic sequence and system
Flutter structure to combine, obtain system normal UNICOM region；Adjustable according in the normal connected region of described system
Degree power type, selects coordinated operation strategy tentatively to judge the active balance of system, and records non-renewable energy
The unlatching number of units of source generating set, the charge-discharge electric power of battery and the excess power of renewable energy power generation unit
Active power dispatch information carry out active power dispatch.
As preferably, according to described active power dispatch information, the active power utilizing Load flow calculation to obtain system lacks
Volume and reactive power vacancy；According to described system active power vacancy and reactive power vacancy, utilize and revise plan
Slightly the dispatch command of non-renewable energy resources generating set and energy-storage battery is modified, and calls and can interrupt bearing
The cutting method of lotus.
As preferably, also include Manual isolation switch, be arranged in the branch of electric power system grid structure, use
In the excision operation to corresponding load point.
Compared with prior art, the invention has the beneficial effects as follows: in regenerative resource, there is randomness, intermittently
In the case of the feature of property, in independent microgrid system planning and designing, regenerative resource can be made full use of,
Ensure that the power supply reliability of system simultaneously.
Accompanying drawing explanation
Fig. 1 is the system architecture schematic diagram of a present invention wherein embodiment.
Fig. 2 is the hard charging strategy schematic flow sheet of a present invention wherein embodiment.
Fig. 3 is the correction strategy schematic flow sheet of a present invention wherein embodiment.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and reality
Execute example, the present invention is further elaborated.Only should be appreciated that specific embodiment described herein
In order to explain the present invention, it is not intended to limit the present invention.
Any feature disclosed in this specification (including any accessory claim, summary and accompanying drawing), removes
Non-specifically describes, all can be by other equivalences or have the alternative features of similar purpose and replaced.That is, remove
Non-specifically describes, and each feature is an example in a series of equivalence or similar characteristics.
As it is shown in figure 1, a kind of independent micro-grid electric power system, independent micro-grid electric power system is divided into different
Feeder zone；In this specific embodiment, renewable energy power generation machine is wind-driven generator, non-renewable energy resources
Generator is diesel-driven generator；Diesel-driven generator as system master power supply uses concentration access way, warp
Transformer is connected from different feeder zone；Wind-driven generator WT and energy storage device EA is (concrete real at this
Execute in example as batteries to store energy device) it is arranged on the bus that high voltage side of transformer is connected or is arranged on feeder line district
Territory is internal (being arranged on inside feeder zone in this specific embodiment).
In this specific embodiment, it is contemplated that the line fault in transformer fault and feeder zone, transformer
High-pressure side and porch, feeder zone are respectively arranged with automatic safety device.When an error occurs, automatic safety device
Intrasystem irregular operating state can be detected in time, by trip operation rapid disengagement failure region be
Unite the connection in other region, thus realize the isolation of fault zone.
In this specific embodiment, it is inside each feeder zone at tree network, root node and area entry
Automatic safety device is connected, and load point is dispersed in the Heavenly Stems and Earthly Branches and the branch of network.Some branch of tree network
It is provided with Manual isolation switch, it would be preferable to support the excision operation of corresponding load point, but does not contains inside each feeder line district
Automatic safety device.
In the system shown in figure 1, high voltage side of transformer and porch, each feeder zone are equipped with and automatically protect dress
Put.Under this structure, all elements in feeder zone are all at the protection domain of its porch automatic safety device
In, when any element failure in region, rapid action is made whole feeder line by corresponding automatic safety device
Zone isolation, thus all loads in causing this region have a power failure.When certain region is isolated, in this region
The power supply of all renewable energy power generation equipment and energy storage device is all by cut-out.In sum, in system arbitrarily
The fault of circuit all can be equivalent to the fault in respective feed connection region.With the independent micro-grid electric power system shown in Fig. 1
As a example by, whole system can be divided into 4 regions according to the position of automatic safety device.Region 0 is diesel generation
The master control power supply area that machine forms with transformer, region 1～3 is different load area.
Independent micro-grid electric power system is divided into different feeder zone, renewable energy power generation in reading system
Power-supply device operational factor and the fault parameters such as unit, non-renewable energy resources generating set and energy storage device, with
And the basic Power Flow Information of feeder zone and fault message；According to all power-supply devices and the fault of feeder zone
Parameter, carries out moment state sampling to described power-supply device and feeder zone, obtains described power-supply device and feedback
The state change cyclic sequence in line region；The topological structure of described state change cyclic sequence with system is tied mutually
Close, obtain system normal UNICOM region；According to the schedulable power supply kind in the normal connected region of described system
Class, selects coordinated operation strategy tentatively to judge the active balance of system, and records non-renewable energy resources generator
The meritorious tune of the excess power of unlatching number of units, the charge-discharge electric power of battery and the renewable energy power generation unit of group
Degree information carries out active power dispatch.
In this specific embodiment, based on sequential Monte Carlo simulation, element each in system is carried out state
Sampling, produces the running status sequence of each element.
In sampling generation system after the running status sequence of each power supply and feeder zone, it becomes possible to according to system
Topological structure obtains the system connected region in each moment and (is not i.e. automatically protected the district of device isolation
Territory).As a example by Fig. 1 system, when in system, fault-free occurs, connected region is that whole middle pressure is independent micro-
Net electric power system.When fault occurs in region 0 (transformer fault), all diesel-driven generators all move back
Going out to run, connected region is region 1,2,3, and energy storage device is by the master control power supply temporarily as system.When
When fault occurs in zone 1, separation generator and energy storage device are the most out of service, and connected region is region
0、2、3.When fault occurs in region 2 (or region 3), connected region be 0,1,3 (or 0,1,
2), diesel-driven generator will cooperate with wind-driven generator, energy storage device, to fault-free block supply.
The Real-time Power Flow poised state of system is judged based on system running policy.This specific embodiment is based on having
On the coordinated operation policy grounds of merit balance, it is further proposed that correction strategy based on trend balance is in terms of simultaneously
And active balance and the reactive balance impact on system reliability.
In the independent micro-grid electric power system being originally embodied as exist two kinds of schedulable power supplys: diesel-driven generator and
Batteries to store energy device.According to the selection of schedulable power supply, the coordinated operation strategy of independent micro-grid electric power system
Three classes can be divided into: energy storage scheduling strategy, diesel-driven generator scheduling strategy, the association of energy storage and diesel-driven generator
Adjust scheduling strategy.In view of power failure and the impact of area fault, this specific embodiment is in coordinated operation plan
Count above-mentioned three class situations in slightly simultaneously:
Floating charge strategy: if diesel-driven generator region is isolated by protection device action, system will be with battery
Energy storage is as master control power supply, and coordinates wind-driven generator to exert oneself to meet workload demand.Floating charge strategy is used to make
For the operation reserve under energy storage scheduling method, its dispatching principle is: if regenerative resource is exerted oneself and is higher than in system
Workload demand, dump power is energy storage charging, when energy storage maximum charge power can not dissolve dump power,
Surplus power is recorded as regenerative resource and abandons power EP (t)；Otherwise, if regenerative resource is exerted oneself low in system
In workload demand, insufficient section is supplemented by energy storage electric discharge.
Strategy without energy storage: if batteries to store energy region is isolated by protection device action, system runs on bavin
Under fry dried food ingredients motor scheduling strategy.The diesel-driven generator scheduling strategy used is: preferentially utilize development of renewable energy
Electricity is powered to load, and insufficient section is provided by diesel-driven generator.Under this strategy, clean according to this step-length of system
Load condition selects diesel-driven generator to open number of units: if net load is less than 0, one diesel generation of enforced opening
Machine ensures system stable operation, and records regenerative resource and abandon power EP (t)；If net load is more than 0, root
Suitable diesel-driven generator is selected to open number of units according to net load value size, if available diesel-driven generator all puts into
Run and still can not meet net load demand, make diesel-driven generator open number of units and send out number of units equal to available bavin.
Hard charging strategy: when in independent micro-grid all the most normally devote oneself to work containing power supply area time, system is in fortune
Need during row to coordinate the relation between diesel-driven generator, renewable energy power generation and energy storage.In order to as far as possible
Reduce the fuel consumption of diesel-driven generator, more fully utilize intrasystem regenerative resource, select firmly to fill
Electricity strategy is as the coordinated operation strategy under this pattern.Under this strategy, diesel-driven generator and batteries to store energy can
Alternate play main power source meets net load demand (system total load and the difference of generated output of renewable energy source), its
Flow process is as shown in Figure 2.
In Fig. 2, P1-P6 represents system net load respectively, counts the net load of system reserve capacity, electric power storage
Pond maximum charge power, battery maximum discharge power, diesel generating set EIAJ, diesel-driven generator
Group minimum load (more than 0).This strategy is according to this moment system net load and spare capacity, and upper a period of time
In quarter, diesel-driven generator is opened number of units and energy storage charge-discharge electric power and is calculated and should open bavin in this step-length and send out number of units
nt, and then according to system net carry calculation accumulator cell charging and discharging power PbatT (), system are abandoned ENERGY E P (t) etc. and are referred to
Mark, the correction strategy link for subsequent time provides essential information.
According to described active power dispatch information, Load flow calculation is utilized to obtain the active power vacancy of system and idle merit
Rate vacancy；According to described system active power vacancy and reactive power vacancy, utilize correction strategy to can not be again
The dispatch command of raw energy generator group and energy-storage battery is modified, and calls the reduction plan of interruptible load
Slightly.
On above-mentioned coordinated operation policy grounds based on active balance, present invention further proposes based on tide
The correction strategy of mobile equilibrium.Correction strategy flow process is as shown in Figure 3:
For calculating system load flow, needing the given node of system, branch road and generator information, the present invention selects
Above-mentioned information is stored, in order to trend input information is recombinated with feeder zone for base unit.Need
It is emphasized that two way convertor in energy-storage system of accumulator can run at four quadrants, i.e. it can be
In Converter Capacity limits, absorb according to system requirements or release active power and reactive power.Therefore for
The independent micro-grid electric power system that reactive capability is limited, must count and the nothing of batteries to store energy in its operation reserve
Function power.In addition, it is contemplated that the node voltage brought when renewable energy power generation power is higher than workload demand is lifted
The problem of liter, abandons power in the reduction that meter of the present invention and regenerative resource are exerted oneself, i.e. coordinated operation Policy Result
EP (t) counts in Load flow calculation not as the effective output of wind-driven generator.
In correction strategy, gain merit real-time with system of the instruction that each power supply is issued by independent micro-grid electric power system
Vacancy Plack(t) and no-power vacancy QlackT () is relevant, its calculation is as follows:
Plack(t)=max (0, Ps.re(t)-Ps.max(t)) (1)
Qlack(t)=max (0, Qs.re(t)-Qs.max(t)) (2)
In formula, Ps.re(t)、Qs.reT () meritorious, idle is exerted oneself for balance in power flow solutions that node should provide；
Ps.max(t)、Qs.maxT () is that the maximum that can be provided by of main power source is meritorious, reactive power, when diesel-driven generator or storage
When energy system is as main power source, it calculates as follows:
In formula, Pdis.maxT () is the maximum discharge power of energy-storage system；SdgFor diesel oil Rated motor capacity；Scon
For energy storage two way convertor rated capacity；Pbat(t) and PdgT () is respectively energy storage device, diesel-driven generator is gained merit
Exerting oneself, their initial value is given by coordinated operation strategy, and constantly updates in correction strategy.
With meritorious vacancy Plack(t), no-power vacancy QlackT () is foundation, described correction strategy is: when energy storage system
When system is as main power source, if there is power shortage, the diesel-driven generator opening an armed state makes up this
Vacancy；When diesel-driven generator is as main power source, if there is power shortage, preferentially call having of energy-storage system
Merit, reactive energy make up this vacancy, and when energy-storage system is sufficient to compensate for vacancy, reselection opens one
The diesel-driven generator of armed state makes up this vacancy；If all power supplys have been in full hair-like state the most in system,
But still suffer from power shortage, now need to call load and cut down strategy.
Described load cutting method is: determine the interruptible load in independent micro-grid electric power system, and according to having
Workload amount from small to large and or is cut down according to significance level sequential build load from lightweight to heavyweight
Table.
Described load cutting method also includes, when carrying out load and cutting down, with described load reduction table for depending on
According to, the most meritorious and load or burden without work of excision interruptible load point, to currently after excision each time
Whether meritorious total load and the idle total load of system are updated, rejudge master control source nominal capacity and can
Meet the system total load after updating, then can cut down termination, system resumes power by load, record and can interrupt
The excision total amount of load, otherwise continue executing with load cut down strategy, until meet described judgement or all can in
Till disconnected load is the most cut.
Described load cutting method also includes, if still can not meet described judgement after excising all interruptible loads
Foundation, in system, all load point all have a power failure.
In view of the impact of grid structure, all in each feeder zone it is connected with main line through Manual isolation switch
Load point is regarded as interruptible load, can be cut when generation capacity deficiency in load cuts down strategy
Remove.Under trend equilibrium condition, the meritorious of interruptible load point and reactive power should be paid close attention to simultaneously.This is concrete
Embodiment only considers single load type, and such as all load is resident load, and therefore load is cut down suitable
Sequence is only relevant with load.For improving analog rate, heuristic load is taked to cut down strategy herein: first false
Fixed all load point are not cut down, and call coordinated operation strategy and correction strategy and carry out the operation shape of simulation system
State.When there is the situation of system generation capacity deficiency, the interruptible load of load total amount minimum is preferentially cut
Removing, repeating this process until meeting following formula:
In formula, SmpT () is the rated capacity of current system main power source.If this formula meets, show that system can be passed through
Load is cut down strategy and is restored electricity, and now system blackout time LT (t) is recorded as 0, power failure amount UL (t) record
Total amount L is cut down for interruptible loadcut(t)。
It should be noted that due to interruptible load Limited Number in system, taking load to cut down strategy might not
The system of being able to ensure that reaches power balance.If interruptible load is still unsatisfactory for wanting of formula (5) after all cutting down
Asking, whole system will have a power failure less than workload demand completely because of generating capacity.Now system blackout time LT (t)
Being recorded as 1 hour, power failure amount UL (t) is recorded as Real-time Load L (t) of whole system.
Claims (6)
1. an independent micro-grid electric power system power supply reliability load cutting method, it is characterised in that independent microgrid system is divided into different feeder zone；Master control power supply uses concentrates access way, is connected from different feeder zone through transformer；Independent microgrid system also include renewable energy power generation machine and or energy storage device, be arranged on high voltage side of transformer be connected bus on or be arranged on inside feeder zone；Determine the interruptible load in independent micro-grid electric power system, and from small to large and or cut down table according to significance level sequential build load from lightweight to heavyweight according to burden with power amount；
When energy storage device is as master control power supply, if there is power shortage, the non-renewable energy resources generator opening an armed state makes up this vacancy；When non-renewable energy resources generator is as master control power supply, if there is power shortage, preferentially calling meritorious, the reactive energy of energy storage device to make up this vacancy, when energy storage device is sufficient to compensate for vacancy, reselection is opened the non-renewable energy resources generator of an armed state and is made up this vacancy；If in system, all power supplys have been in full hair-like state the most, but still suffer from power shortage, now need to call load cutting method；
Described load cutting method also includes, when carrying out load and cutting down, table is cut down as foundation with described load, the most meritorious and the load or burden without work of excision interruptible load point, after excision each time, meritorious total load and the idle total load of current system is updated, rejudge the system total load after whether master control source nominal capacity can meet renewal, then can cut down termination by load, system resumes power, record the excision total amount of interruptible load, otherwise continue executing with load and cut down strategy, until meet described judgement or all interruptible loads the most cut till.
Independent micro-grid electric power system power supply reliability load cutting method the most according to claim 1, it is characterized in that, described load cutting method also includes, if still can not meet after excising all interruptible loads whether master control source nominal capacity can meet the basis for estimation of the system total load after renewal, in system, all load point all have a power failure.
Independent micro-grid electric power system power supply reliability load cutting method the most according to claim 1; it is characterized in that; also include automatic safety device, be arranged on high voltage side of transformer and feeder zone entrance, when fault, automatically cut off the connection of fault zone and other region of electric power system；When any element failure in region, rapid action is made whole feeder zone isolate by corresponding automatic safety device.
Independent micro-grid electric power system power supply reliability load cutting method the most according to claim 1, it is characterized in that, independent micro-grid electric power system is divided into different feeder zone, renewable energy power generation unit, non-renewable energy resources generating set and energy storage device power-supply device operational factor and fault parameter in reading system, and the basic Power Flow Information of feeder zone and fault message；According to all power-supply devices and the fault parameter of feeder zone, described power-supply device and feeder zone are carried out moment state sampling, obtain the state change cyclic sequence of described power-supply device and feeder zone；Described state change cyclic sequence is combined with the topological structure of system, obtains system normal UNICOM region；According to the schedulable power type in the normal connected region of described system, select coordinated operation strategy tentatively to judge the active balance of system, and the active power dispatch information recording the excess power of the unlatching number of units of non-renewable energy resources generating set, the charge-discharge electric power of battery and renewable energy power generation unit carries out active power dispatch.
Independent micro-grid electric power system power supply reliability load cutting method the most according to claim 4, it is characterised in that according to described active power dispatch information, utilizes Load flow calculation to obtain active power vacancy and the reactive power vacancy of system；According to described system active power vacancy and reactive power vacancy, utilize correction strategy that the dispatch command of non-renewable energy resources generating set and energy-storage battery is modified, and call the reduction strategy of interruptible load.
Independent micro-grid electric power system power supply reliability load cutting method the most according to claim 1, it is characterised in that also include Manual isolation switch, be arranged in the branch of electric power system grid structure, for operating the excision of corresponding load point.
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| CN106856330A (en) * | 2017-01-20 | 2017-06-16 | 许继集团有限公司 | The unbalanced adjusting method of active power in flexible load control system |
| CN110247403A (en) * | 2019-07-18 | 2019-09-17 | 广东电网有限责任公司 | A kind of judgment method that the isolated island internal loading containing distributed generation resource is cut down |
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| 《基于孤岛运行特性的微电网可靠性分析》;王杨等;《电网技术》;20140930;第38卷(第9期);第2379-2385页 * |
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| CN104682398A (en) | 2015-06-03 |
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