CN110011320A - A kind of extra-high-voltage alternating current substation reactive voltage optimal control method and system - Google Patents
A kind of extra-high-voltage alternating current substation reactive voltage optimal control method and system Download PDFInfo
- Publication number
- CN110011320A CN110011320A CN201910249715.3A CN201910249715A CN110011320A CN 110011320 A CN110011320 A CN 110011320A CN 201910249715 A CN201910249715 A CN 201910249715A CN 110011320 A CN110011320 A CN 110011320A
- Authority
- CN
- China
- Prior art keywords
- voltage
- ultra
- high voltage
- station
- substation
- 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
- 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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The invention discloses a kind of extra-high-voltage alternating current substation reactive voltage optimal control method and systems, belong to power system and automation technology.The present invention passes through an important evidence using the reactive power exchange amount of the side ultra-high voltage transformer station 1000kv and the side 500kv as ultra-high voltage transformer station reactive power/voltage control, simultaneously from extra-high voltage grid Global control, reactive voltage adjusting is carried out one by one for voltage out-of-limit substation, under the premise of guaranteeing that each ultra-high voltage transformer station voltage operates in voltage limits range, so that the reactive power exchange amount of the side ultra-high voltage transformer station 1000kv and the side 500kv is minimum, so as to improve the utilization rate of the equipment such as transformer, reduce the active loss of extra-high voltage grid route, guarantee the safety and stability economical operation of extra-high voltage grid.
Description
Technical field
The invention belongs to power system and automation technologies, and more precisely, the present invention relates to a kind of extra-high voltages
AC Substation reactive voltage optimal control method.
Background technique
Important bridge of the ultra-high voltage AC transmission as large capacity long distance power transmission, reliable and stable operation are most important.
The key technology of extra-high-voltage alternating current includes voltage control, Insulation Coordination, electromagnetic environment research, extra-high voltage equipment manufacture etc..It is idle
Voltage control is to ensure power grid security, reliable, economical operation important means, seems especially heavy in extra-high-voltage alternating current power grid
: on the one hand, extra-high-voltage alternating current power grid is because long-distance sand transport is high-power, and active loss is very big, reasonable reactive power/voltage control
Active loss can be greatly reduced, bring huge economic benefit for the operation of extra-high-voltage alternating current power grid；On the other hand, extra-high voltage
The safe and stable operation of AC network is particularly significant, if lacking effective reactive voltage control method, it is likely that make equipment by
To destruction, or even Voltage Instability phenomenon can be caused, so as to cause a wide range of power outages accident.
Extra-high voltage AC circuit has the characteristics such as capacity is big, distance is remote, charge power is big, the big bring voltage of load fluctuation
Waves and stability outstanding problem, reactive power/voltage control needs are studied according to these characteristics.
Summary of the invention
Object of the present invention is to: in order to solve the problems, such as extra-high-voltage alternating current substation reactive power/voltage control, guarantee extra-high piezoelectricity
Net safety and stability economical operation promotes the utilization rates of equipment and installations such as extra-high voltage main transformer, reduces route active loss, avoids in reactive voltage
Occur over control in control process, proposes a kind of ultra-high voltage transformer station reactive voltage optimal control method.
It is realized specifically, the present invention adopts the following technical solutions.
A kind of extra-high-voltage alternating current substation reactive voltage optimal control method, comprising the following steps:
Step 1: extracting the electrical quantity of each ultra-high voltage transformer station, calculates ultra-high voltage transformer station according to each electrical quantity of extraction
The side 1000kv issues reactive power exchange amount Q to the side 500kvIt issuesReactive power exchange is absorbed from the side 500kv with the side ultra-high voltage transformer station 1000kv
Measure QIt absorbs；
Step 2: the voltage of all ultra-high voltage transformer stations of the whole network is successively judged whether within the scope of voltage limits, if deposited
In voltage out-of-limit situation, by the secondary capacitor or low tension reactor or logical that put into or exit the maximum substation of more voltage limit
The reactive voltage for overregulating be connected with our station 500kv substation or power plant is controlled our station voltage, until all extra-high voltages
Transformer substation voltage is within the scope of voltage limits；
Step 3: if ultra-high voltage transformer station voltage within the scope of voltage limits, according to each ultra-high voltage transformer station
The reactive power exchange amount of the side 1000kv and the side 500kv whether more than the capacity of one group of secondary capacitor or one group of low tension reactor be according to
According to, to each ultra-high voltage transformer station carry out reactive voltage adjusting, each station voltage is adjusted in synchronism in adjustment process, guarantees each extra-high voltage
Transformer substation voltage is within the scope of voltage limits.
Further, this method further include the voltage of ultra-high voltage transformer station is controlled within the scope of voltage limits first and
By the reactive power exchange amount control of the side each substation 1000kv and the side 500kv in one group of secondary capacitor or one group of low tension reactor
In range of capacity.
Further, the step 2 method particularly includes:
Successively judge that whether within the scope of voltage limits, the change of voltage limits is exceeded if there is voltage for each transformer substation voltage
Power station filters out the maximum station substation A of out-of-limit absolute value of voltage, judges whether there is available secondary capacitor or low pressure in the station A
Reactor, if secondary capacitor or low tension reactor can not be used in the station A, according to the A station connected 500kv power transformation in the side 500kv
The far and near sequence of electrical distance of standing, the close station 500kv of electrical distance is moved back in first throwing can use secondary capacitor or low tension reactor or adjusting
Power output that power plant is idle, then throw move back the remote station 500kv of electrical distance can with secondary capacitor or low tension reactor or adjust power plant without
Function power output；
If there are available secondary capacitor or low tension reactor in the station A, one group of secondary capacitor or low tension reactor are moved back in throwing；
Until by ultra-high voltage transformer station voltage VAControl is within the scope of voltage limits.
Further, step 3 method particularly includes: if all transformer substation voltages within the scope of voltage limits, by
A substation judges that the side 1000kv issues reactive power exchange amount Q to the side 500kvIt issuesWhether one group of secondary capacitor capacity Q is greater thanCOr
The side ultra-high voltage transformer station 1000kv absorbs reactive power exchange amount Q from the side 500kvIt absorbsWhether one group of low tension reactor capacity Q is greater thanL, such as
Fruit is more than one group of secondary capacitor or low tension reactor there are the reactive power exchange amount of the side ultra-high voltage transformer station 1000kv and the side 500kv
Capacity, step continues, otherwise exits；
Determine all QIt issues>QCOr QIt absorbs>QLSubstation, from big to small by the reactive power exchange amount absolute value of these substations
It is ranked up, and successively judges whether it meets preset condition since first substation, occur not meeting preset condition
Substation then puts into or exits one group low-voltage capacitance according to the reactive power exchange situation of the special side substation 1000kv and the side 500kv
Device or one group of low tension reactor；If all QIt issues>QCOr QIt absorbs>QLSubstation all meet preset condition and then exit.
Further, the preset condition is any one of following three conditions:
(1) voltage of substation is greater than upper voltage limit threshold value VUpper limit thresholdAnd the station side 1000kv is idle from the absorption of the side 500kv,
The expression formula of upper voltage limit threshold value is as follows:
VUpper limit threshold=VThe upper limit-1-MAX(ΔVL,ΔVC),
Wherein Δ VL isThrowing moves back one group and low resists the extra-high voltage station bus line voltage variable quantity, Δ VCOne group of low appearance is moved back in throwing, and this is extra-high
Pressure station bus line voltage variable quantity, while considering the safety margin of 1kv；
(2) voltage of substation is less than lower voltage limit threshold value VLower thresholdAnd the station side 1000kv is idle to the sending of the side 500kv,
In lower voltage limit threshold value VLower thresholdExpression formula it is as follows:
VLower threshold=VLower limit+1+MAX(ΔVL,ΔVC),
Wherein Δ VLIt moves back one group to throw and low resists the extra-high voltage station bus line voltage variable quantity, Δ VCMoving back one group of low appearance for throwing should
Extra-high voltage station bus line voltage variable quantity, while considering the safety margin of 1kv；
(3) the extra-high voltage station can not use secondary capacitor and low tension reactor.
On the other hand, the present invention provides a kind of extra-high-voltage alternating current substation reactive power and voltage control systems, comprising:
Electrical quantity extraction module, for extracting the electrical quantity of each ultra-high voltage transformer station, the electrical quantity includes bus line electricity
Pressure, line current, secondary capacitor total group of number MC, low tension reactor total group of number ML, secondary capacitor the group number of investment NCWith
And the group number of the investment N of low tension reactorL；
Reactive power exchange amount computing module, for according to each electrical quantity of extraction calculate the side ultra-high voltage transformer station 1000kv to
The side 500kv issues reactive power exchange amount QIt issuesReactive power exchange amount Q is absorbed from the side 500kv with the side ultra-high voltage transformer station 1000kvIt absorbs；
Transformer substation voltage adjustment module, for successively judge each transformer substation voltage whether within the scope of voltage limits, if
There are the substations that voltage exceeds voltage limits, then select the maximum ultra-high voltage transformer station of voltage out-of-limit and adjust to its voltage
Section；Until the voltage of all substations is restored within the scope of voltage limits；
The judgement of reactive power exchange amount and execution module, if for judging all transformer substation voltages in voltage limits range
Interior, then substation judges that the side 1000kv issues reactive power exchange amount Q to the side 500kv one by oneIt issuesWhether it is greater than one group of secondary capacitor to hold
Measure QCAnd the side ultra-high voltage transformer station 1000kv absorbs reactive power exchange amount Q from the side 500kvIt absorbsWhether one group of low tension reactor is greater than
Capacity QL, if there is the reactive power exchange amount of the side ultra-high voltage transformer station 1000kv and the side 500kv be more than one group of secondary capacitor or
The capacity of low tension reactor, step continue, and otherwise exit；
Determine all QIt issues>QCOr QIt absorbs>QLSubstation, from big to small by the reactive power exchange amount absolute value of these substations
It is ranked up, and successively judges whether it meets preset condition since first substation, occur not meeting preset condition
Substation then puts into or exits one group low pressure according to the reactive power exchange situation of the side ultra-high voltage transformer station 1000kv and the side 500kv
Capacitor or one group of low tension reactor jump to the execution of second step iteration；If all QIt issues>QCOr QIt absorbs>QLSubstation all accord with
Preset condition is closed then to exit.
Advantageous effects acquired by the present invention:
1, the present invention is from extra-high voltage grid Global control, it is contemplated that idle in practical ultra-high voltage transformer station
Exist between voltage control process Zhong Ge substation and influence each other, therefore during reactive power/voltage control, every time just for electricity
It presses out-of-limit maximum ultra-high voltage transformer station to be adjusted, avoids over control occur during reactive power/voltage control with this；This
Invention is using the reactive power exchange amount of the side ultra-high voltage transformer station 1000kv and the side 500kv as ultra-high voltage transformer station reactive power/voltage control
One important evidence, with this by the reactive power exchange of the side ultra-high voltage transformer station 1000kv and the side 500kv control one group it is low hold/it is low anti-
In range of capacity or in acceptable smaller range, is guaranteeing voltage in limits, improving transformer etc. to greatest extent and set
Standby utilization rate reduces the active loss of extra-high voltage grid route, guarantees the safety and stability economical operation of extra-high voltage grid.2, this hair
The bright voltage by ultra-high voltage transformer station controls within the scope of voltage limits and by the idle of the side substation 1000kv and the side 500kv
Exchange capacity controls in the range of capacity of one group of secondary capacitor or one group of low tension reactor, reaches raising extra-high voltage main transformer etc. and sets
The purpose of standby utilization rate and reduction network loss.
Detailed description of the invention
A kind of ultra-high voltage transformer station reactive voltage optimal control method workflow that Fig. 1 specific embodiment of the invention provides
Figure.
Specific embodiment
Present invention is further described in detail in conjunction with the embodiments with reference to the accompanying drawings.
Embodiment 1:
The present embodiment proposes a kind of extra-high-voltage alternating current substation reactive voltage optimal control method.First determine whether the whole network institute
There is the voltage of extra-high-voltage alternating current substation (hereinafter referred to as ultra-high voltage transformer station) to be made whether to limit in range in voltage up/down, institute
State the ultrahigh voltage substation bus bar voltage curve bound that voltage up/down limit range uses scheduling institution publication.If there is electricity
Out-of-limit situation is pressed, by putting into or exiting our station secondary capacitor or low tension reactor (hereinafter referred to as low perhaps low anti-) or adjust
Our station is connected 500kv substation or power station voltage is idle is controlled to our station voltage, until all ultra-high voltage transformer station voltages
It limits in range over/under；If ultra-high voltage transformer station voltage limits in range over/under, according to each ultra-high voltage transformer station
The reactive power exchange amount of the side 1000kv and the side 500kv perhaps low anti-capacity whether low more than one group is foundation, to each extra-high voltage power transformation
Stand carry out reactive voltage adjusting, each station voltage is adjusted in synchronism in adjustment process, guarantee each ultra-high voltage transformer station voltage it is upper/
In lower range.Voltage adjustment by the above process limits the premise of range in guarantee ultra-high voltage transformer station voltage over/under
Under, reduce the side ultra-high voltage transformer station 1000kv and the side 500kv reactive power exchange to the greatest extent, improves the benefit of the equipment such as main transformer
With rate, the safety and stability economical operation of extra-high voltage grid ensure that.
The implementation process of the present embodiment is as shown in Figure 1:
By taking the North China Power Telecommunication Network 1000kv extra-high voltage rack of winter in 2019 as an example, the validity of the above method is verified,
North China Power Telecommunication Network in 2019 puts into operation 15 ultra-high voltage transformer stations altogether, and table 1 is North China Power Telecommunication Network winter base load North China Power Telecommunication Network in 2019
The initial reactive voltage situation of ultra-high voltage transformer station, have under initial mode seen from table 19 sides ultra-high voltage transformer station 1000kv and
The side 500kv reactive power exchange amount be more than one group it is low hold/low anti-capacity, table 2 is the initial trend of North China Power Telecommunication Network extra-high voltage grid and active
Situation is lost, by the visible North China Power Telecommunication Network the whole network side ultra-high voltage transformer station 1000kv of table 2 and the side 500kv reactive power exchange absolute value total amount
3626Mvar, extra high voltage line active loss 40.1MW.Ultra-high voltage transformer station voltage up/down limit value is in actual operation
1080kv/1020kv, in the range by table 1, the visible each station voltage of table 2, while according on each ultra-high voltage transformer station voltage/
Lower limit determines that each station voltage bound threshold value is shown in Table 3.
The initial reactive voltage situation of 1 North China Power Telecommunication Network ultra-high voltage transformer station of table
Note: it is idle that "-" indicates that the side ultra-high voltage transformer station 1000kv is absorbed from the side 500kv.
The initial trend of 2 North China Power Telecommunication Network extra-high voltage grid of table and active loss situation
| Route | Active (MW) | Line loss (MW) |
| Triumph-Xi Meng | -1984 | 2.8 |
| Xi Meng-Langfang | -1725 | 4.1 |
| Langfang-Haihe River | 807 | 0.5 |
| Baoding-Haihe River | 1086 | 0.7 |
| The Northern Mountain-Baoding | 2299 | 4 |
| Erdos-the Northern Mountain | 1244 | 0.8 |
| Haihe River-spring city | 2403 | 3.6 |
| Spring city-Changle | -937 | 0.8 |
| Changle-Gao Xiang | -12 | 0.1 |
| Gao Xiang-Zaozhuang | 1596 | 0.7 |
| Zaozhuang-Heze | -62 | 0 |
| Heze-Xingtai | -1431 | 1.7 |
| Xingtai-spring city | 1759 | 2.3 |
| Flood is apt to-Xingtai | 3172 | 12.5 |
| Hengshan Mountain-flood is kind | 1917 | 4.3 |
| Baoding-Xingtai | 1382 | 1.2 |
Note: "-" indicates that active power is sent to first section from end.
3 North China Power Telecommunication Network ultra-high voltage transformer station voltage up/down limit value of table and threshold value
With ultra-high voltage transformer station reactive voltage control method provided by the present invention to special in above-mentioned North China Power Telecommunication Network mode
High voltage substation reactive voltage is adjusted, and is briefly described by taking Langfang station during reactive power/voltage control as an example, Langfang station
Voltage up/down is limited to 1080kv/1020kv, and one group of low reactance voltage variation 5kv is moved back in throwing, and one group of low appearance voltage change 4kv is moved back in throwing.Cause
It is 1074kv/1026kv that this Langfang station up/down, which limits threshold value,.Under initial mode, Langfang station side 1000kv issues idle to the side 500kv
632Mvar, more than one group low appearance capacity, Langfang station busbar voltage 1056kv, over/under limit threshold range in, as shown in Table 1 this
When Langfang station can be used it is low hold/it is low anti-.One group of low appearance is exited, Langfang station side 1000kv issues idle 462Mvar to the side 500kv,
More than one group secondary capacitor capacity, Langfang station voltage 1051kv, continues according to step of the present invention at this time, final complete
After net reactive voltage is adjusted, 2 groups of low appearances are exited at Langfang station altogether and 1 group of investment is low anti-, at this time the side Langfang station 1000kv to
The side 500kv issues idle 187Mvar, appearance low less than one group/low anti-capacity, and Langfang station voltage 1046kv limits model in voltage up/down
In enclosing.Whether there is or not can be used the judgment method of low appearance/resistance to be, if ultra-high voltage transformer station voltage VALess than voltage limits lower limit
VLower limit, and secondary capacitor can not be thrown or low tension reactor can be moved back, as without secondary capacitor or low tension reactor can be used；If
Ultra-high voltage transformer station voltage VAGreater than voltage limits upper limit VThe upper limit, and secondary capacitor can not be moved back or low tension reactor can be thrown, i.e.,
For secondary capacitor or low tension reactor can not be used.
After the whole network reactive voltage is adjusted, the results are shown in Table 4 for ultra-high voltage transformer station reactive power/voltage control, can by table 4
See, (since the station Xi Meng voltage is high in addition to the side tin alliance 1000kv and the side 500kv reactive power exchange amount are more than one group of low appearance/low anti-capacity
In upper limit threshold, such as exit one group of reactance, Xi Meng voltage of standing will be more than the upper limit), the side remaining ultra-high voltage transformer station 1000kv with
The side 500kv reactive power exchange amount be less than one group it is low hold/low anti-capacity, North China Power Telecommunication Network the whole network side ultra-high voltage transformer station 1000kv and
The side 500kv reactive power exchange absolute value total amount 1714Mvar, reactive power exchange amount reduce about 53%.Ultra-high voltage transformer station major part voltage
Slightly reduce before thering is certain promotion, extra high voltage line active loss 39.8MW, route active loss to adjust compared with reactive voltage.By
This is as it can be seen that the side ultra-high voltage transformer station 1000kv and the side 500kv reactive power exchange are greatly decreased, main transformer etc. after reactive voltage is adjusted
Equipment efficiency of usage gets a promotion, and extra high voltage line active loss is slightly reduced, and improves extra-high voltage grid to a certain extent
Economy.
The method of the present invention adjusts to assist control ultra-high voltage transformer station voltage by thermal power plant, 500kv substation reactive voltage
Process.Wherein first order outlet Zhan Zhi 500kv substation or power plant by route directly with the side ultra-high voltage transformer station 500kv phase
Connection.Since first order outlet station is nearest from extra-high voltage station, ultra-high voltage transformer station voltage is assisted under identical Reactive-power control amount
Regulating effect is best, and the second level and later substation are due to relatively far away from from ultra-high voltage transformer station, and the company with extra-high voltage station
There are also substations among line, and second level substation is under identical Reactive-power control amount, to ultra-high voltage transformer station voltage auxiliary adjustment
Effect effect compared with the first order wants far short of what is expected, therefore in a particular embodiment preferably, and adjustment process only limits the first order and goes out
Line station.
Situation after 4 North China Power Telecommunication Network ultra-high voltage transformer station reactive voltage of table is adjusted
Note: it is idle that "-" indicates that the side ultra-high voltage transformer station 1000kv is absorbed from the side 500kv.
Trend and active loss situation after 5 North China Power Telecommunication Network extra-high voltage grid reactive voltage of table is adjusted
| Route | Active (MW) | Line loss (MW) |
| Triumph-Xi Meng | -1984 | 2.8 |
| Xi Meng-Langfang | -1725 | 4.1 |
| Langfang-Haihe River | 792 | 0.7 |
| Baoding-Haihe River | 1083 | 0.7 |
| The Northern Mountain-Baoding | 2300 | 4 |
| Erdos-the Northern Mountain | 1244 | 0.8 |
| Haihe River-spring city | 2428 | 3.5 |
| Spring city-Changle | -913 | 0.7 |
| Changle-Gao Xiang | -5.6 | 0.1 |
| Gao Xiang-Zaozhuang | 1586 | 0.7 |
| Zaozhuang-Heze | -72 | 0 |
| Heze-Xingtai | -1447 | 1.7 |
| Xingtai-spring city | 1772 | 2.2 |
| Flood is apt to-Xingtai | 3172 | 12.4 |
| Hengshan Mountain-flood is kind | 1917 | 4.3 |
| Baoding-Xingtai | 1400 | 1.1 |
Note: "-" indicates that active power is sent to first section from end.
In another embodiment, if there is voltage out-of-limit situation, by putting into or exiting the maximum change of more voltage limit
The secondary capacitor in power station exits its low tension reactor or by adjusting the idle of be connected with our station 500kv substation or power plant
Voltage is controlled our station voltage, until all ultra-high voltage transformer station voltages are within the scope of voltage limits；
Method particularly includes: successively judge that each transformer substation voltage whether within the scope of voltage limits, exceeds if there is voltage
The substation of voltage limits filters out the maximum station substation A of out-of-limit absolute value of voltage, judges whether there is available low pressure in the station A
Capacitor or low tension reactor, if secondary capacitor or low tension reactor can not be used in the station A, according to the station the A side 500kv company, institute
The far and near sequence of 500kv substation electrical distance, first throw and move back the close station 500kv of electrical distance and can use secondary capacitor or low tension
Anti- device adjusts the idle power output of power plant, then throw move back the remote station 500kv of electrical distance can with secondary capacitor or low tension reactor or
Adjust the idle power output of power plant；
If there are available secondary capacitor or low tension reactor in the station A, one group of secondary capacitor or low tension reactor are moved back in throwing；
Until by ultra-high voltage transformer station voltage VAControl is within the scope of voltage limits.
In conclusion ultra-high voltage transformer station reactive power/voltage control is based on each transformer substation voltage offset bound degree at present
Controlled, and each equal independent control of ultra-high voltage transformer station reactive power/voltage control, do not consider the side ultra-high voltage transformer station 1000kv and
The utilization rate situation and ultra-high voltage transformer station reactive voltage adjustment process of the equipment such as the side 500kv reactive power exchange situation, transformer
In influence each other situation, the present invention passes through using the reactive power exchange amount of the side ultra-high voltage transformer station 1000kv and the side 500kv as extra-high
One important evidence of buckling power station reactive power/voltage control, while from extra-high voltage grid Global control, for
Voltage out-of-limit substation carries out reactive voltage adjusting one by one, operates in voltage bound in each ultra-high voltage transformer station voltage of guarantee
Under the premise of being worth range, so that the reactive power exchange amount of the side ultra-high voltage transformer station 1000kv and the side 500kv is minimum, so as to improve transformation
The utilization rate of the equipment such as device reduces the active loss of extra-high voltage grid route, guarantees the safety and stability economical operation of extra-high voltage grid.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program product.Cause
This, the shape of complete hardware embodiment, complete software embodiment or embodiment combining software and hardware aspects can be used in the application
Formula.Moreover, the application, which can be used, can use storage in the computer that one or more wherein includes computer usable program code
The form for the computer program product implemented on medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.).
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The embodiment of the present invention is described in conjunction with attached drawing above, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (9)
1. a kind of extra-high-voltage alternating current substation reactive voltage optimal control method, which comprises the following steps:
Step 1: extracting the electrical quantity of each ultra-high voltage transformer station, calculates ultra-high voltage transformer station according to each electrical quantity of extraction
The side 1000kv issues reactive power exchange amount Q to the side 500kvIt issuesReactive power exchange is absorbed from the side 500kv with the side ultra-high voltage transformer station 1000kv
Measure QIt absorbs；
Step 2: the voltage of all ultra-high voltage transformer stations of the whole network is successively judged whether within the scope of voltage limits, if there is electricity
Out-of-limit situation is pressed, by putting into or exiting the secondary capacitor of the maximum substation of more voltage limit or low tension reactor or pass through tune
The reactive voltage for saving be connected with our station 500kv substation or power plant is controlled our station voltage, until all extra-high voltage power transformations
Voltage stand within the scope of voltage limits；
Step 3: if ultra-high voltage transformer station voltage within the scope of voltage limits, according to each ultra-high voltage transformer station 1000kv
Whether the reactive power exchange amount of side and the side 500kv is foundation more than the capacity of one group of secondary capacitor or low tension reactor, to each spy
High voltage substation carries out reactive voltage adjusting, and each station voltage is adjusted in synchronism in adjustment process, guarantees each ultra-high voltage transformer station electricity
Pressure is within the scope of voltage limits.
2. a kind of extra-high-voltage alternating current substation reactive voltage optimal control method according to claim 1, which is characterized in that
This method further includes first controlling the voltage of ultra-high voltage transformer station within the scope of voltage limits and by each substation 1000kv
The reactive power exchange amount of side and the side 500kv controls in the range of capacity of one group of secondary capacitor and one group of low tension reactor.
3. a kind of extra-high-voltage alternating current substation reactive voltage optimal control method according to claim 1, which is characterized in that
The step 2 method particularly includes:
Successively judge that whether within the scope of voltage limits, the power transformation of voltage limits is exceeded if there is voltage for each transformer substation voltage
It stands, filters out the maximum station substation A of out-of-limit absolute value of voltage, judge whether there is available secondary capacitor or low tension in the station A
Anti- device, if secondary capacitor or low tension reactor can not be used in the station A, according to the station the A connected 500kv substation in the side 500kv
The far and near sequence of electrical distance, first throwing move back the close station 500kv of electrical distance and can use secondary capacitor or low tension reactor or adjust electricity
Power output that factory is idle, then throw move back the remote station 500kv of electrical distance can be with secondary capacitor or low tension reactor or to adjust power plant idle
Power output；
If there are available secondary capacitor or low tension reactor in the station A, one group of secondary capacitor or low tension reactor are moved back in throwing；
Until by ultra-high voltage transformer station voltage VAControl is within the scope of voltage limits.
4. extra-high-voltage alternating current substation according to claim 1 reactive voltage optimal control method, which is characterized in that step
Three method particularly includes: if all transformer substation voltages, within the scope of voltage limits, substation judges the side 1000kv one by one
Reactive power exchange amount Q is issued to the side 500kvIt issuesWhether one group of secondary capacitor capacity Q is greater thanCOr the side ultra-high voltage transformer station 1000kv
Reactive power exchange amount Q is absorbed from the side 500kvIt absorbsWhether one group of low tension reactor capacity Q is greater thanL, if there is ultra-high voltage transformer station
The reactive power exchange amount of the side 1000kv and the side 500kv is more than the capacity of one group of secondary capacitor or low tension reactor, step continue into
Row, is otherwise exited；
Determine all QIt issues>QCOr QIt absorbs>QLSubstation, the reactive power exchange amount absolute value of these substations is carried out from big to small
Sequence, and successively judge whether it meets preset condition since first substation, occur not meeting the power transformation of preset condition
Stand, put into or exit according to the reactive power exchange situation of the special side substation 1000kv and the side 500kv one group secondary capacitor or
One group of low tension reactor；If all QIt issues>QCOr QIt absorbs>QLSubstation all meet preset condition and then exit.
5. ultra-high voltage transformer station reactive voltage optimal control method according to claim 4, which is characterized in that described default
Condition is any one of following three conditions:
(1) voltage of substation is greater than upper voltage limit threshold value VUpper limit thresholdAnd the station side 1000kv absorbs idle, voltage from the side 500kv
The expression formula of upper limit threshold is as follows:
VUpper limit threshold=VThe upper limit-1-MAX(ΔVL,ΔVC),
Wherein Δ VL isThrowing moves back one group and low resists the extra-high voltage station bus line voltage variable quantity, Δ VCOne group of low appearance extra-high voltage station is moved back in throwing
Bus line voltage variable quantity, while considering the safety margin of 1kv；
(2) voltage of substation is less than lower voltage limit threshold value VLower thresholdAnd the station side 1000kv is idle to the sending of the side 500kv, in electricity
Press lower threshold VLower thresholdExpression formula it is as follows:
VLower threshold=VLower limit+1+MAX(ΔVL,ΔVC),
Wherein Δ VLIt moves back one group to throw and low resists the extra-high voltage station bus line voltage variable quantity, Δ VCMoving back one group of low appearance for throwing, this is extra-high
Pressure station bus line voltage variable quantity, while considering the safety margin of 1kv；
(3) the extra-high voltage station can not use secondary capacitor and low tension reactor.
6. ultra-high voltage transformer station reactive voltage optimal control method according to claim 1, which is characterized in that described electrical
Amount include bus line voltage, line current, secondary capacitor total group of number MC, low tension reactor total group of number ML, secondary capacitor
Investment group number NCAnd the group number of the investment N of low tension reactorL。
7. ultra-high voltage transformer station reactive voltage optimal control method according to claim 3, which is characterized in that judge power transformation
Whether stand has the method for available secondary capacitor or low tension reactor as follows:
If ultra-high voltage transformer station voltage VALess than voltage limits lower limit VLower limit, and secondary capacitor can not be thrown or low tension can be moved back
Anti- device, as without secondary capacitor or low tension reactor can be used；
If ultra-high voltage transformer station voltage VAGreater than voltage limits upper limit VThe upper limit, and secondary capacitor can not be moved back or low tension can be thrown
Anti- device, as without secondary capacitor or low tension reactor can be used.
8. ultra-high voltage transformer station reactive voltage optimal control method according to claim 3, which is characterized in that adjustment process
Only limit first order outlet station.
9. a kind of ultra-high voltage transformer station reactive power and voltage control system characterized by comprising
Electrical quantity extraction module, for extracting the electrical quantity of each ultra-high voltage transformer station, the electrical quantity includes bus line voltage, line
Total group of number M of electric current, secondary capacitorC, low tension reactor total group of number ML, secondary capacitor the group number of investment NCAnd it is low
Press the group number of the investment N of reactorL；
Reactive power exchange amount computing module, for calculating the side ultra-high voltage transformer station 1000kv to 500kv according to each electrical quantity of extraction
Side issues reactive power exchange amount QIt issuesReactive power exchange amount Q is absorbed from the side 500kv with the side ultra-high voltage transformer station 1000kvIt absorbs；
Transformer substation voltage adjustment module, for successively judge each transformer substation voltage whether within the scope of voltage limits, if there is
Voltage exceeds the substation of voltage limits, then selectes the maximum ultra-high voltage transformer station of voltage out-of-limit and its voltage is adjusted；Directly
Voltage to all substations is restored within the scope of voltage limits；
The judgement of reactive power exchange amount and execution module, if for all transformer substation voltages of judgement within the scope of voltage limits,
Substation judges that the side 1000kv issues reactive power exchange amount Q to the side 500kv one by oneIt issuesWhether one group of secondary capacitor capacity Q is greater thanC
Or the side ultra-high voltage transformer station 1000kv absorbs reactive power exchange amount Q from the side 500kvIt absorbsWhether one group of low tension reactor capacity Q is greater thanL,
It is more than one group of secondary capacitor or low pressure reactance if there is the reactive power exchange amount of the side ultra-high voltage transformer station 1000kv and the side 500kv
The capacity of device, step continue, and otherwise exit；
Determine all QIt issues>QCOr QIt absorbs>QLSubstation, the reactive power exchange amount absolute value of these substations is carried out from big to small
Sequence, and successively judge whether it meets preset condition since first substation, occur not meeting the power transformation of preset condition
It stands, puts into or exit one group low-voltage capacitance according to the reactive power exchange situation of the side ultra-high voltage transformer station 1000kv and the side 500kv
Device or one group of low tension reactor jump to the execution of second step iteration；If all QIt issues>QCOr QIt absorbs>QLSubstation all meet it is pre-
If condition then exits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910249715.3A CN110011320B (en) | 2019-03-29 | 2019-03-29 | Reactive voltage optimization control method and system for extra-high voltage alternating current transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910249715.3A CN110011320B (en) | 2019-03-29 | 2019-03-29 | Reactive voltage optimization control method and system for extra-high voltage alternating current transformer substation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110011320A true CN110011320A (en) | 2019-07-12 |
| CN110011320B CN110011320B (en) | 2022-08-19 |
Family
ID=67168933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910249715.3A Active CN110011320B (en) | 2019-03-29 | 2019-03-29 | Reactive voltage optimization control method and system for extra-high voltage alternating current transformer substation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110011320B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110797889A (en) * | 2019-11-18 | 2020-02-14 | 国电南瑞科技股份有限公司 | Energy storage power station arrangement method for solving tidal current congestion problem |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107834567A (en) * | 2017-11-30 | 2018-03-23 | 国家电网公司西北分部 | The reactive voltage control method for coordinating of UHVDC converter station and near region power plant |
| CN107959303A (en) * | 2017-11-30 | 2018-04-24 | 国家电网公司 | UHVDC converter station and the reactive voltage control method for coordinating of near region substation |
| CN108493950A (en) * | 2018-05-09 | 2018-09-04 | 国网湖南省电力有限公司 | Extra-high voltage direct-current near region multistage power grid coordination automatic voltage control method and system |
-
2019
- 2019-03-29 CN CN201910249715.3A patent/CN110011320B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107834567A (en) * | 2017-11-30 | 2018-03-23 | 国家电网公司西北分部 | The reactive voltage control method for coordinating of UHVDC converter station and near region power plant |
| CN107959303A (en) * | 2017-11-30 | 2018-04-24 | 国家电网公司 | UHVDC converter station and the reactive voltage control method for coordinating of near region substation |
| CN108493950A (en) * | 2018-05-09 | 2018-09-04 | 国网湖南省电力有限公司 | Extra-high voltage direct-current near region multistage power grid coordination automatic voltage control method and system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110797889A (en) * | 2019-11-18 | 2020-02-14 | 国电南瑞科技股份有限公司 | Energy storage power station arrangement method for solving tidal current congestion problem |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110011320B (en) | 2022-08-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108418255B (en) | Planning method and system suitable for extra-high voltage direct current outgoing power grid containing high-permeability new energy | |
| CN107959303B (en) | Reactive voltage coordination control method for extra-high voltage direct current converter station and near-field transformer substation | |
| CN109659980A (en) | The tractive power supply system energy management optimization method of integrated hybrid energy-storing and photovoltaic devices | |
| CN103001234B (en) | Method for controlling reactive voltage in ultra-high voltage grid on the basis of improved economic voltage difference | |
| CN201805234U (en) | Comprehensive voltage reactive power control system with harmonic suppression function | |
| CN106936152B (en) | Consider the ac and dc systems voltage and reactive power coordinated control method of converter station loss characteristic | |
| Zhou et al. | Coordinated power control of electrochemical energy storage for mitigating subsequent commutation failures of HVDC | |
| CN107134785B (en) | Power transmission network voltage coordination optimization control method considering network structure optimization | |
| CN105183999B (en) | Electric system maximum short circuit current computational methods containing photovoltaic plant | |
| CN105226675B (en) | Prevent the inverter Reactive-power control control method of grid-connected voltage out-of-limit | |
| CN104269847A (en) | Flexible looped network control system operation and power flow optimization method | |
| Varma et al. | Review of studies and operational experiences of PV hosting capacity improvement by smart inverters | |
| CN102570474A (en) | Triggering and conducting method used for switching of capacitor of thyristor AC non-contact switch | |
| CN102904265B (en) | Transformer station voltage reactive control method and system based on region tidal current | |
| CN105071397B (en) | The coordination reactive voltage control method for the polymorphic type reactive-load compensation equipment that wind-powered electricity generation is sent outside | |
| CN109888775A (en) | A kind of underrun day power grid structures optimization method considering wind power integration | |
| CN110011320A (en) | A kind of extra-high-voltage alternating current substation reactive voltage optimal control method and system | |
| CN113555878A (en) | Platform district electric energy quality synthesizes compensation system | |
| Pang et al. | Interruption method for commutation failure caused cascading reaction of HVDC with wind farm integration under grid fault | |
| CN106655212A (en) | Method and system for comprehensively controlling reactive compensation of passive power distribution network | |
| CN107910870B (en) | Switching control method and device for distributed static series compensator | |
| Tao et al. | Power Control Strategy of Flexible Interconnection System in Distribution Network | |
| CN107785921B (en) | Urban power grid partition interconnection operation scheduling method based on flexible direct current transmission technology | |
| CN109659950A (en) | Become the powerless control system and method for the voltage source converter of lower voltage limit | |
| CN115689187A (en) | Distributed photovoltaic open capacity calculation method and system for power distribution network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |