CN108092278A - A kind of reactive-load compensation method and system for considering low-voltage equipment influence - Google Patents
A kind of reactive-load compensation method and system for considering low-voltage equipment influence Download PDFInfo
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- CN108092278A CN108092278A CN201711235407.2A CN201711235407A CN108092278A CN 108092278 A CN108092278 A CN 108092278A CN 201711235407 A CN201711235407 A CN 201711235407A CN 108092278 A CN108092278 A CN 108092278A
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- 230000006641 stabilisation Effects 0.000 claims description 10
- 238000011105 stabilization Methods 0.000 claims description 10
- 230000001052 transient effect Effects 0.000 claims description 10
- 238000005192 partition Methods 0.000 claims description 6
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Classifications
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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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
-
- 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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1878—Arrangements for adjusting, eliminating or compensating reactive power in networks using tap changing or phase shifting transformers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The reactive-load compensation method and system influenced the present invention provides a kind of consideration low-voltage equipment, including：Set the initial reactive compensation capacity of low-voltage equipment access website；Service requirement is met as target using the high pressure main transformer bet power factor under low-voltage cable access conditions, low-voltage cable access high voltage network analogue simulation is carried out, adjusts the initial reactive compensation capacity, obtain final reactive compensation capacity；The reactive-load compensation of website is carried out based on the final reactive compensation capacity.Technical solution provided by the invention reduces the operation risk of low-voltage cable access system；Improve the ability that power grid resists Voltage Instability risk；Improve electricity net safety stable high-efficiency and economic operation level.
Description
Technical field
The invention belongs to field of power, and in particular to the reactive-load compensation method and be that a kind of consideration low-voltage equipment influences
System.
Background technology
The influence factor of urban distribution network 110kV/35kV (10kV) power supply zone reactive voltage characteristic includes following four side
Face：
(1) throwing of user's reactive-load compensation is moved back, and is that guarantee power factor is up to standard, and user's reactive-load compensation is negative generally according to its maximum
Lotus configures, and cannot exit in time at light load, will trigger reactive reverse 35kV (10kV) circuit.
(2) 35kV (10kV) cable charge power, the cable of equal model, charge power is mainly related with length, long
Degree is longer, and charge power is bigger, and injection 110kV substations are idle more.
(3) throwing of reactive-load compensation is moved back in 110kV stations, will if reactive-load compensation is exited not in time in station under low ebb load method
Initiation is poured in down a chimney the idle of 110kV power grids and is increased.
(4) 110kV main transformers tap joint position, main transformer tap joint position influence reactive power flow between 110kV, 35kV (10kV)
Distribution, when one side is idle abundant, the distribution of two layers reactive power flow can be optimized by adjusting main transformer tap joint position.
Existing reactive-load compensation equipping rules only for 220kV and more than website, it is desirable that the low-voltage capacitance equipment of website
Configuration meets the ratio of 15%-25%.Existing 220kV websites, can generally configure it is a certain proportion of it is low be installed with it is standby, and in reality
Large size city power grid in, due to the limitation of passway for transmitting electricity, 110kV circuits are generally using cable, under low load operating mode,
The charge power of cable is higher so that injects high voltage network on substantial amounts of voltage power-less so that the idle imbalance of power grid, finally
Partial high pressure site power factor is caused not meet regulatory requirements.
The content of the invention
For in the prior art without the deficiency of the configuration for low pressure reactant devices, it is low that the present invention proposes a kind of consideration
The reactive-load compensation method and system that equipment influences are pressed, by the power grid specificity analysis accessed to more low-voltage cable, introduces emulation
The situation of low-voltage cable access high voltage network and the influence of low-tension transformer tap joint position variation are simulated, simulates Smaller load mode
Whether the influence that lower low-voltage cable charge power is higher and the variation of main transformer tap is to the off line power factor of high-tension transformer meets
The constraint of service requirement, under conditions of meeting the requirement of N-1/N-2 after the system failure is ensured so that reactive-load compensation allocation plan
It is more reasonable.
A kind of reactive-load compensation method for considering low-voltage equipment and influencing, including：
Set the initial reactive compensation capacity of low-voltage equipment access website；
Service requirement is met as target using the high pressure main transformer bet power factor under low-voltage cable access conditions, is carried out
Low-voltage cable accesses high voltage network analogue simulation, adjusts the initial reactive compensation capacity, obtains final reactive compensation capacity；
The reactive-load compensation of website is carried out based on the final reactive compensation capacity.
Further, the high pressure main transformer bet power factor under the access conditions with low-voltage cable meets operation and wants
It asks as target, carries out low-voltage cable access high voltage network analogue simulation, adjust the initial reactive compensation capacity, obtain final
Reactive compensation capacity, including：
Trend equilibrium analysis is carried out to the low-voltage equipment access website, using reactive layered partition balancing as target, adjustment
The initial reactive compensation capacity of the website, determines reactive compensation capacity；
Load tap changer adjusting is carried out to the reactive compensation capacity and low-voltage cable throwing moves back and adjusts simulation analysis check,
Service requirement is met as target using website voltage, carries out the adjustment of the reactive compensation capacity；
Transient stability check is carried out to the reactive compensation capacity after adjustment, service requirement is met as target using website voltage,
The further adjustment of reactive compensation capacity is carried out, obtains final reactive compensation capacity.
Further, it is described using reactive layered partition balancing as target, the initial reactive compensation capacity of the website is adjusted,
Determine reactive compensation capacity, including：
The initial reactive compensation capacity of the website is adjusted, when main transformer is betted power factor in maximum load
Power factor of betting not less than preset first threshold, in the case of minimum load is not higher than preset second presentation time,
Initial reactive compensation capacity after the adjustment is set as work(compensation capacity.
Further, the voltage of the main transformer for 220kV and more than；The preset first threshold is
0.95；The preset second threshold is 0.95.
Further, the service requirement includes：
500kV busbares, during non-emergency operating mode, highest operating voltage is no more than threshold voltage；Minimum operation voltage is not
Influence the adjusting of electric system synchronism stability, voltage stabilization, the normal use of station service and next step voltage；
220kV busbares, during non-emergency operating mode, the deviation range of voltage is the first preset range；Emergency operating mode
When, the deviation range of voltage is the second preset range；
110~35kV busbares, during non-emergency operating mode, the deviation range of voltage is the 3rd preset range；Accident is run
During mode, the deviation range of voltage is the 4th preset range.
Further, the threshold voltage is the 110% of system nominal voltage；First preset range is system nominal
0%~+the 10% of voltage；Second preset range is -5%~+the 10% of system nominal voltage；3rd preset range
For -3%~+the 7% of system nominal voltage；4th preset range is ± the 10% of system nominal voltage.
Further, the fault set that the transient stability is checked includes：N-1 and/or N-2 failures.
Further, further include：Single element meets the check of power system security scleronomic constraint standard；
The standard check includes：
After single element fault disturbance occurs for the electric system under non-emergency operating mode, protection, switch and reclosing are just
Positive motion is made, and does not take stability contorting measure, keeps the normal power supply of power system stability operation and electric system；Electric system is each
Element is no more than defined accident overload ability, then successive trip does not occur.
A kind of reactive compensation system for considering low-voltage equipment and influencing, including：
Initial reactive compensation module, for setting the initial reactive compensation capacity of low-voltage equipment access website；
Acquisition module, will for meeting operation with the high pressure main transformer bet power factor under low-voltage cable access conditions
It asks as target, carries out low-voltage cable access high voltage network analogue simulation, adjust the initial reactive compensation capacity, obtain final
Reactive compensation capacity；
Determining module, for carrying out the reactive-load compensation of website based on the final reactive compensation capacity.
Further, the acquisition module includes：
First reactive-load compensation submodule, for carrying out trend equilibrium analysis to the low-voltage equipment access website, with idle
Hierarchical and regional balance is target, adjusts the initial reactive compensation capacity of the website, determines reactive compensation capacity；
Second reactive-load compensation submodule, for carrying out load tap changer adjusting and low tension to the reactive compensation capacity
Cable throwing, which is moved back, adjusts simulation analysis check, meets service requirement as target using website voltage, carries out the tune of the reactive compensation capacity
It is whole；
Final reactive-load compensation submodule, for carrying out transient stability check to the reactive compensation capacity after adjustment, with website
Voltage meets service requirement for target, carries out the further adjustment of reactive compensation capacity, obtains final reactive compensation capacity.
Further, the first reactive-load compensation submodule includes：
Target submodule, for adjusting the initial reactive compensation capacity of the website, when main transformer is in maximum load feelings
Power factor of betting under condition is not less than preset first threshold, and power factor of betting in the case of minimum load is not higher than advance
Second presentation time of setting, the initial reactive compensation capacity after the adjustment is set as work(compensation capacity.
Further, the second reactive-load compensation submodule includes：
It is required that unit, for 500kV busbares, during non-emergency operating mode, highest operating voltage is no more than threshold voltage；Most
Low working voltage does not influence the adjusting of electric system synchronism stability, voltage stabilization, the normal use of station service and next step voltage；
220kV busbares, during non-emergency operating mode, the deviation range of voltage is the first preset range；Emergency operating mode
When, the deviation range of voltage is the second preset range；
110~35kV busbares, during non-emergency operating mode, the deviation range of voltage is the 3rd preset range；Accident is run
During mode, the deviation range of voltage is the 4th preset range.
Further, the final reactive-load compensation submodule includes：
It is required that unit, for 500kV busbares, during non-emergency operating mode, highest operating voltage is no more than threshold voltage；Most
Low working voltage does not influence the adjusting of electric system synchronism stability, voltage stabilization, the normal use of station service and next step voltage；
220kV busbares, during non-emergency operating mode, the deviation range of voltage is the first preset range；Emergency operating mode
When, the deviation range of voltage is the second preset range；
110~35kV busbares, during non-emergency operating mode, the deviation range of voltage is the 3rd preset range；Accident is run
During mode, the deviation range of voltage is the 4th preset range.
Further, further include：Standard checks module, meets power system security scleronomic constraint standard for single element
It checks；
The standard check includes：
After single element fault disturbance occurs for the electric system under non-emergency operating mode, protection, switch and reclosing are just
Positive motion is made, and does not take stability contorting measure, keeps the normal power supply of power system stability operation and electric system；Electric system is each
Element is no more than defined accident overload ability, then successive trip does not occur.
Compared with the latest prior art, technical solution provided by the invention has the advantages that：
1st, technical solution provided by the invention considers the allocation problem of low pressure reactant devices, obtains low-voltage equipment access station
The reactive compensation capacity of point so that the reactive balance of power grid reduces the operation risk of low-voltage cable access system.
2nd, technical solution provided by the invention improves the ability that power grid resists Voltage Instability risk；Improve power grid security
Stability and high efficiency economic operation level.
3rd, technical solution provided by the invention introduces the situation of analogue simulation low-voltage cable access high voltage network and low pressure becomes
The influence of depressor tap joint position variation, simulates under Smaller load mode that low-voltage cable charge power is higher and the variation of main transformer tap
Whether the influence to the off line power factor of high-tension transformer meets the constraint of service requirement, and N-1/ is met after the system failure is ensured
Under conditions of the requirement of N-2 so that reactive-load compensation allocation plan is more reasonable.
Description of the drawings
Fig. 1 is flow chart of the present invention；
Fig. 2 is the flow signal that the reactive-load compensation that a kind of consideration low-voltage equipment of the embodiment of the present invention influences determines method
Figure；
Fig. 3 is the Shanghai Power Network forcasted years structure diagram in present example；
Fig. 4 exits outlet tidal current chart for reactive-load compensation in 110kV Yining Substation Station in present example；
Fig. 5 is that 110kV Yining substation in present example puts into 1 group capacitor outlet tidal current chart；
Fig. 6 is that 110kV Yining substation in present example puts into 2 group capacitor outlet tidal current charts.
Specific embodiment
The present invention is described in further details below in conjunction with the accompanying drawings.To make the purpose of the embodiment of the present invention, technical solution
It is clearer with advantage, below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out
It clearly and completely describes, it is clear that described embodiment is part of the embodiment of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art obtained without making creative work it is all its
Its embodiment, belongs to the scope of protection of the invention.
Embodiment 1, the present invention propose a kind of reactive-load compensation method for considering low-voltage equipment and influencing, as shown in Figure 1.
Set the initial reactive compensation capacity of low-voltage equipment access website；
Service requirement is met as target using the high pressure main transformer bet power factor under low-voltage cable access conditions, is carried out
Low-voltage cable accesses high voltage network analogue simulation, adjusts the initial reactive compensation capacity, obtains final reactive compensation capacity；
The reactive-load compensation of website is carried out based on the final reactive compensation capacity.
The present invention proposes a kind of reactive-load compensation method and system for considering low-voltage equipment influence, by more low tension
The power grid specificity analysis of cable access introduces the analogue simulation low-voltage cable access situation of high voltage network and low-tension transformer tap
The influence of change in location, simulates that low-voltage cable charge power is higher under Smaller load mode and the variation of main transformer tap is to high pressure transformation
Whether the influence of the off line power factor of device meets the constraint of service requirement, and the requirement of N-1/N-2 is met after the system failure is ensured
Under conditions of so that reactive-load compensation allocation plan is more reasonable.
Embodiment 2, the present invention propose a kind of reactive compensation system for considering low-voltage equipment and influencing, including：
Initial reactive compensation module, for setting the initial reactive compensation capacity of low-voltage equipment access website；
Acquisition module, will for meeting operation with the high pressure main transformer bet power factor under low-voltage cable access conditions
It asks as target, carries out low-voltage cable access high voltage network analogue simulation, adjust the initial reactive compensation capacity, obtain final
Reactive compensation capacity；
Determining module, for carrying out the reactive-load compensation of website based on the final reactive compensation capacity.
Further, the acquisition module includes：
First reactive-load compensation submodule, for carrying out trend equilibrium analysis to the low-voltage equipment access website, with idle
Hierarchical and regional balance is target, adjusts the initial reactive compensation capacity of the website, determines reactive compensation capacity；
Second reactive-load compensation submodule, for carrying out load tap changer adjusting and low tension to the reactive compensation capacity
Cable throwing, which is moved back, adjusts simulation analysis check, meets service requirement as target using website voltage, carries out the tune of the reactive compensation capacity
It is whole；
Final reactive-load compensation submodule, for carrying out transient stability check to the reactive compensation capacity after adjustment, with website
Voltage meets service requirement for target, carries out the further adjustment of reactive compensation capacity, obtains final reactive compensation capacity.
Further, the first reactive-load compensation submodule includes：
Target submodule, for adjusting the initial reactive compensation capacity of the website, when main transformer is in maximum load feelings
Power factor of betting under condition is not less than preset first threshold, and power factor of betting in the case of minimum load is not higher than advance
Second presentation time of setting, the initial reactive compensation capacity after the adjustment is set as work(compensation capacity.
Further, the second reactive-load compensation submodule includes：
It is required that unit, for 500kV busbares, during non-emergency operating mode, highest operating voltage is no more than threshold voltage；Most
Low working voltage does not influence the adjusting of electric system synchronism stability, voltage stabilization, the normal use of station service and next step voltage；
220kV busbares, during non-emergency operating mode, the deviation range of voltage is the first preset range；Emergency operating mode
When, the deviation range of voltage is the second preset range；
110~35kV busbares, during non-emergency operating mode, the deviation range of voltage is the 3rd preset range；Accident is run
During mode, the deviation range of voltage is the 4th preset range.
Further, the final reactive-load compensation submodule includes：
It is required that unit, for 500kV busbares, during non-emergency operating mode, highest operating voltage is no more than threshold voltage；Most
Low working voltage does not influence the adjusting of electric system synchronism stability, voltage stabilization, the normal use of station service and next step voltage；
220kV busbares, during non-emergency operating mode, the deviation range of voltage is the first preset range；Emergency operating mode
When, the deviation range of voltage is the second preset range；
110~35kV busbares, during non-emergency operating mode, the deviation range of voltage is the 3rd preset range；Accident is run
During mode, the deviation range of voltage is the 4th preset range.
Further, further include：Standard checks module, meets power system security scleronomic constraint standard for single element
It checks；
The standard check includes：
After single element fault disturbance occurs for the electric system under non-emergency operating mode, protection, switch and reclosing are just
Positive motion is made, and does not take stability contorting measure, keeps the normal power supply of power system stability operation and electric system；Electric system is each
Element is no more than defined accident overload ability, then successive trip does not occur.
Embodiment 3, Fig. 2 show the reactive-load compensation side of determining that a kind of consideration low-voltage equipment in the embodiment of the present invention influences
The flow diagram of method；This method comprises the following steps：
(1) the initial reactive compensation capacity of website is set；
(2) reactive layered partition balancing analysis is carried out to website, by controlling transformer reactive compensation switching, progressively controlled
220kV and more than main transformer are not less than 0.95 in maximum load bet power factor, bet in the case of minimum load
Power factor is not higher than 0.95, while should control each voltage class busbar voltage in prescribed limit, so that it is determined that low-voltage equipment
The reactive compensation capacity tentative programme of access website；
(3) low-voltage equipment throwing is carried out on scheme and moves back the check that simulation analysis consider voltage fluctuation influence, simulates low-voltage equipment
The process moved back is thrown, determines that " 500kV busbares, during normal operating mode, highest operating voltage must not exceed system nominal voltage
110%；Minimum operation voltage should not influence electric system synchronism stability, voltage stabilization, the normal use of station service and next stage
The adjusting of voltage；220kV busbares, during normal operating mode, voltage tolerance is 0%~+the 10% of system nominal voltage；Thing
Therefore it is -5%~+the 10% of system nominal voltage during the method for operation；110~35kV busbares, during normal operating mode, voltage allows
Deviation is -3%~+the 7% of corresponding system rated voltage；It ± the 10% " of system nominal voltage is target to be after accident, further
Adjust the reactive compensation capacity of low-voltage equipment access website；
(4) transient state N-1/N-2 simulation analysis are carried out to scheme, running situation after simulation is broken down determines website
Whether voltage meets service requirement for target, further adjusts the reactive compensation capacity of website；
(5) arrange meet (2) simultaneously, (3), the reactive compensation capacity scheme of low-voltage equipment access website of (4) requirement are matched somebody with somebody
It puts, the reactive compensation capacity scheme of the low-voltage equipment access website as recommendation.
Preferably, following constraint is introduced in the step (2)：With " 220kV and more than main transformer are in maximum load feelings
Power factor of betting under condition is not less than 0.95, and bet power factor is target not higher than 0.95 " in the case of minimum load, and configuration becomes
Depressor reactive compensation capacity；
Preferably, following constraint is introduced in the step (3)：With " 500kV busbares, during normal operating mode, highest fortune
Row voltage must not exceed the 110% of system nominal voltage；It is steady that minimum operation voltage should not influence electric system synchronism stability, voltage
The adjusting of the fixed, normal use of station service and next step voltage；220kV busbares, during normal operating mode, voltage tolerance is
0%~+the 10% of system nominal voltage；It is -5%~+the 10% of system nominal voltage during emergency operating mode；110~35kV
Busbar, during normal operating mode, voltage tolerance is -3%~+the 7% of corresponding system rated voltage；It is system volume after accident
± the 10% " of constant voltage is target, in the process of analogue simulation low-voltage equipment switching, simulates website under the conditions of low-voltage equipment switching
Voltage fluctuation；
Preferably, following constraint is introduced in the step (4)：Met with power system operation mode《Electric power system stability
Determine directive/guide》Requirement, i.e., after single element fault disturbance occurs for electric system under normal operating mode, protection, switch and again
Close a floodgate the correct normal power supply for acting, not taking stability contorting measure, the operation of holding power system stability and electric system, other
Element is no more than defined accident overload ability, and successive trip does not occur as target, it is necessary to which the fault set considered includes：Circuit
With the N-1 failures forever of transformer three；
Wherein, as can be seen from FIG. 2, during the adjustment, the reactive compensation capacity after adjustment should meet this adjustment ring simultaneously
The requirement of section and front adjustment link, that is, ensure that the value finally adjusted meets all constraint links simultaneously, if in certain adjustment link
In can not meet the requirement of the link, then situation is fed back into the first adjustment link, and readjusted since the link idle
Compensation capacity.
Embodiment 4, with reference to Fig. 3, by taking Shanghai Power Network forcasted years typical way research as an example, one kind of the present invention is examined
The reactive-load compensation that considering low-voltage equipment influences determines that method further illustrates：
(1) Shanghai Power Network research level year typical way structure diagram is as shown in Figure 3；
(2) first, using reactive layered partition balancing as target, according to " 220kV and more than main transformer are in maximum load feelings
Power factor of betting under condition bet not less than 0.95, in the case of minimum load power factor be not higher than 0.95 " requirement, with setting low
Press the preliminary reactive-load compensation allocation plan of equipment sites；
(3) secondly, on the basis of the Scheme of Reactive Power Compensation determined in (2), the process that analogue simulation is moved back in low-voltage equipment throwing is carried out,
Whether voltage fluctuation meets service requirement under the conditions of simulation low-voltage equipment throwing is moved back, according to " 500kV busbares, during normal operating mode,
Highest operating voltage must not exceed the 110% of system nominal voltage；Minimum operation voltage should not influence electric system synchronism stability,
The adjusting of voltage stabilization, the normal use of station service and next step voltage；220kV busbares, during normal operating mode, voltage allows
Deviation is 0%~+the 10% of system nominal voltage；It is -5%~+the 10% of system nominal voltage during emergency operating mode；110
~35kV busbares, during normal operating mode, voltage tolerance is -3%~+the 7% of corresponding system rated voltage；It is after accident
± the 10% " of system nominal voltage is assessed the reasonability of low-voltage equipment access website reactive-load compensation allocation plan and is modified
It is perfect；
Table 1 shows that 110kV Yining station owner becomes influence of the tap-c hange control to access website voltage fluctuation, figure under former mode
4-6 shows that the reactive-load compensation for considering the low-voltage equipment access website that influence is moved back in low-voltage equipment throwing is determined under the mode after method
The low-voltage equipment power of the assembling unit fluctuates the influence to access website voltage fluctuation, and the scheme after adjusting as can be seen reduces voltage play
The situation of strong fluctuation, more rationally；
(3) finally, on the basis of the low-voltage equipment access website reactive-load compensation allocation plan determined in (2), transient state electricity is carried out
Stability check is pressed, assess the reasonability of reactive-load compensation allocation plan and is modified perfect；Result of calculation is as shown in table 2, shows
The magnitude of a voltage fluctuation of most low-voltage equipment access websites can meet service requirement, the electricity of indivedual low-voltage equipment access websites
Press undulating value excessive there are fluctuating range, the requirement of discontented afc voltage range of operation has, it is necessary to adjust reactive-load compensation allocation plan
Body regulating measures are shown in Table 3.
1 110kV Yining station owner of table becomes influence of the tap_changing to reactive power flow
Influence of the low-voltage cable to reactive power flow is accessed at 2 500kV Jing'an station of table
| Sequence number | Line name | Charge power | It is idle to inject 220kV circuits |
| 1 | Navigate 3# in Jing'an-ten thousand | 75.266 | 75.214 |
| 2 | Jing'an-recovery 49 | 75.266 | 75.29 |
| 3 | Jing'an-Hengfeng 09 | 75.266 | 75.288 |
| 4 | Jing'an-Jinan 74 | 75.266 | 75.294 |
| 5 | Jing'an-Nanshi 75 | 75.266 | 75.302 |
The former mode of table 3 and after determining method adjustment using a kind of reactive-load compensation for considering low-voltage equipment and influencing reactive-load compensation match somebody with somebody
The adjustment contrast table put
Stability check is emulated by above-mentioned analysis of reactive power balance, transient voltage emulation and low-voltage equipment switching, it is proposed that suitable
The reactive-load compensation allocation plan of Shanghai Power Network forcasted years is answered, network voltage can be met and flexibly control requirement, low pressure is improved and sets
Voltage ＆ var control ability under the conditions of standby switching, reduces investment, promotes the ability that power grid resists Voltage Instability risk.
In conclusion the problem of reactive-load compensation for 220kV websites configures, passes through the electricity accessed to more low-voltage cable
Net specificity analysis, the situation and low-tension transformer tap joint position that can introduce analogue simulation low-voltage cable access high voltage network become
The influence of change, simulates that low-voltage cable charge power is higher under Smaller load mode and the variation of main transformer tap is off line to high-tension transformer
Whether the influence of power factor meets the constraint of service requirement, and the condition of the requirement of N-1/N-2 is met after the system failure is ensured
Under so that reactive-load compensation allocation plan is more reasonable.
It should be understood by those skilled in the art that, embodiments herein can be provided as method, system or computer program
Product.Therefore, the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware can be used in the application
Apply the form of example.Moreover, the computer for wherein including computer usable program code in one or more can be used in the application
The computer program production that usable storage medium is implemented on (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The application is with reference to the flow according to the method for the embodiment of the present application, equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that it can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
The processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that the instruction performed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction generation being stored in the computer-readable memory includes referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps is performed on calculation machine or other programmable devices to generate computer implemented processing, so as in computer or
The instruction offer performed on other programmable devices is used to implement in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, to the greatest extent
Pipe is described in detail the present invention with reference to above-described embodiment, those of ordinary skills in the art should understand that：Still
The specific embodiment of the present invention can be modified or replaced equivalently, and without departing from any of spirit and scope of the invention
Modification or equivalent substitution, should be covered by the scope of the claims of the present invention.
Claims (14)
1. a kind of reactive-load compensation method for considering low-voltage equipment and influencing, which is characterized in that including：
Set the initial reactive compensation capacity of low-voltage equipment access website；
Service requirement is met as target using the high pressure main transformer bet power factor under low-voltage cable access conditions, carries out low pressure
Cable accesses high voltage network analogue simulation, adjusts the initial reactive compensation capacity, obtains final reactive compensation capacity；
The reactive-load compensation of website is carried out based on the final reactive compensation capacity.
2. a kind of reactive-load compensation method for considering low-voltage equipment and influencing as described in claim 1, which is characterized in that described with low
High pressure main transformer bet power factor under voltage cable access conditions meets service requirement for target, carries out low-voltage cable access
High voltage network analogue simulation adjusts the initial reactive compensation capacity, obtains final reactive compensation capacity, including：
Trend equilibrium analysis is carried out to the low-voltage equipment access website, using reactive layered partition balancing as target, described in adjustment
The initial reactive compensation capacity of website, determines reactive compensation capacity；
Load tap changer adjusting is carried out to the reactive compensation capacity and low-voltage cable throwing moves back and adjusts simulation analysis check, with station
Point voltage meets service requirement for target, carries out the adjustment of the reactive compensation capacity；
Transient stability check is carried out to the reactive compensation capacity after adjustment, service requirement is met as target using website voltage, is carried out
The further adjustment of reactive compensation capacity, obtains final reactive compensation capacity.
3. a kind of reactive-load compensation method for considering low-voltage equipment and influencing as claimed in claim 2, which is characterized in that described with nothing
Work(hierarchical and regional balance is target, adjusts the initial reactive compensation capacity of the website, determines reactive compensation capacity, including：
The initial reactive compensation capacity of the website is adjusted, when main transformer is not low in maximum load bet power factor
Power factor of betting in the case of preset first threshold, minimum load is not higher than preset second presentation time, by institute
It states the initial reactive compensation capacity after adjustment and is set as work(compensation capacity.
A kind of 4. reactive-load compensation method for considering low-voltage equipment and influencing as claimed in claim 3, which is characterized in that the main transformer
The voltage of depressor for 220kV and more than；The preset first threshold is 0.95；The preset second threshold is
0.95。
A kind of 5. reactive-load compensation method for considering low-voltage equipment and influencing as claimed in claim 2, which is characterized in that the operation
It requires to include：
500kV busbares, during non-emergency operating mode, highest operating voltage is no more than threshold voltage；Minimum operation voltage does not influence
The adjusting of electric system synchronism stability, voltage stabilization, the normal use of station service and next step voltage；
220kV busbares, during non-emergency operating mode, the deviation range of voltage is the first preset range；During emergency operating mode, electricity
The deviation range of pressure is the second preset range；
110~35kV busbares, during non-emergency operating mode, the deviation range of voltage is the 3rd preset range；Emergency operating mode
When, the deviation range of voltage is the 4th preset range.
A kind of 6. reactive-load compensation method for considering low-voltage equipment and influencing as claimed in claim 5, which is characterized in that the threshold value
Voltage is the 110% of system nominal voltage；First preset range is 0%~+the 10% of system nominal voltage；Described second
Preset range is -5%~+the 10% of system nominal voltage；3rd preset range for system nominal voltage -3%~+
7%；4th preset range is ± the 10% of system nominal voltage.
A kind of 7. reactive-load compensation method for considering low-voltage equipment and influencing as claimed in claim 2, which is characterized in that the transient state
The fault set of stability check includes：N-1 and/or N-2 failures.
8. a kind of reactive-load compensation method for considering low-voltage equipment and influencing as described in claim 1, which is characterized in that further include：
Single element meets the check of power system security scleronomic constraint standard；
The standard check includes：
After single element fault disturbance occurs for the electric system under non-emergency operating mode, protection, switch and the positive positive motion of reclosing
Make, do not take stability contorting measure, keep the normal power supply of power system stability operation and electric system；Each element of electric system
No more than defined accident overload ability, then successive trip does not occur.
9. a kind of reactive compensation system for considering low-voltage equipment and influencing, which is characterized in that including：
Initial reactive compensation module, for setting the initial reactive compensation capacity of low-voltage equipment access website；
Acquisition module, for using under low-voltage cable access conditions high pressure main transformer bet power factor meet service requirement as
Target carries out low-voltage cable access high voltage network analogue simulation, adjusts the initial reactive compensation capacity, obtains final idle
Compensation capacity；
Determining module, for carrying out the reactive-load compensation of website based on the final reactive compensation capacity.
10. a kind of reactive compensation system for considering low-voltage equipment and influencing as claimed in claim 9, which is characterized in that described to obtain
Modulus block includes：
First reactive-load compensation submodule, for carrying out trend equilibrium analysis to the low-voltage equipment access website, with reactive layered
Partition balancing is target, adjusts the initial reactive compensation capacity of the website, determines reactive compensation capacity；
Second reactive-load compensation submodule, for carrying out load tap changer adjusting and low-voltage cable throwing to the reactive compensation capacity
It moves back and adjusts simulation analysis check, service requirement is met as target using website voltage, carries out the adjustment of the reactive compensation capacity；
Final reactive-load compensation submodule, for carrying out transient stability check to the reactive compensation capacity after adjustment, with website voltage
Meet service requirement for target, carry out the further adjustment of reactive compensation capacity, obtain final reactive compensation capacity.
11. a kind of reactive compensation system for considering low-voltage equipment and influencing as claimed in claim 10, which is characterized in that described the
One reactive-load compensation submodule includes：
Target submodule, for adjusting the initial reactive compensation capacity of the website, when main transformer is in maximum load
Power factor of betting is not less than preset first threshold, and power factor of betting in the case of minimum load, which is not higher than, to be preset
The second presentation time, the initial reactive compensation capacity after the adjustment is set as work(compensation capacity.
12. a kind of reactive compensation system for considering low-voltage equipment and influencing as claimed in claim 10, which is characterized in that described the
Two reactive-load compensation submodules include：
It is required that unit, for 500kV busbares, during non-emergency operating mode, highest operating voltage is no more than threshold voltage；Minimum fortune
Row voltage does not influence the adjusting of electric system synchronism stability, voltage stabilization, the normal use of station service and next step voltage；
220kV busbares, during non-emergency operating mode, the deviation range of voltage is the first preset range；During emergency operating mode, electricity
The deviation range of pressure is the second preset range；
110~35kV busbares, during non-emergency operating mode, the deviation range of voltage is the 3rd preset range；Emergency operating mode
When, the deviation range of voltage is the 4th preset range.
13. a kind of reactive compensation system for considering low-voltage equipment and influencing as claimed in claim 10, which is characterized in that it is described most
Whole reactive-load compensation submodule includes：
It is required that unit, for 500kV busbares, during non-emergency operating mode, highest operating voltage is no more than threshold voltage；Minimum fortune
Row voltage does not influence the adjusting of electric system synchronism stability, voltage stabilization, the normal use of station service and next step voltage；
220kV busbares, during non-emergency operating mode, the deviation range of voltage is the first preset range；During emergency operating mode, electricity
The deviation range of pressure is the second preset range；
110~35kV busbares, during non-emergency operating mode, the deviation range of voltage is the 3rd preset range；Emergency operating mode
When, the deviation range of voltage is the 4th preset range.
14. a kind of reactive compensation system for considering low-voltage equipment and influencing as claimed in claim 13, which is characterized in that also wrap
It includes：Standard checks module, and meeting power system security scleronomic constraint standard for single element checks；
The standard check includes：
After single element fault disturbance occurs for the electric system under non-emergency operating mode, protection, switch and the positive positive motion of reclosing
Make, do not take stability contorting measure, keep the normal power supply of power system stability operation and electric system；Each element of electric system
No more than defined accident overload ability, then successive trip does not occur.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115693695A (en) * | 2022-11-03 | 2023-02-03 | 浙江大学 | Distributed voltage clamping method for 100% new energy source sending end power grid |
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| CN103269079A (en) * | 2013-03-11 | 2013-08-28 | 中国电力科学研究院 | Reactive compensation configuration method based on static and transient voltage stability constraint |
| CN104538972A (en) * | 2014-12-12 | 2015-04-22 | 国网宁夏电力公司经济技术研究院 | Reactive compensation configuration method and device based on transient voltage stability constraint |
| CN105811432A (en) * | 2016-04-15 | 2016-07-27 | 国网青海省电力公司经济技术研究院 | Method and device for determining reactive compensation of photovoltaic access station |
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| CN103269079A (en) * | 2013-03-11 | 2013-08-28 | 中国电力科学研究院 | Reactive compensation configuration method based on static and transient voltage stability constraint |
| CN104538972A (en) * | 2014-12-12 | 2015-04-22 | 国网宁夏电力公司经济技术研究院 | Reactive compensation configuration method and device based on transient voltage stability constraint |
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Application publication date: 20180529 |