CN102354995B - Control method and control system for VQC (voltage quality control) of transformer substation - Google Patents
Control method and control system for VQC (voltage quality control) of transformer substation Download PDFInfo
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- CN102354995B CN102354995B CN2011103039599A CN201110303959A CN102354995B CN 102354995 B CN102354995 B CN 102354995B CN 2011103039599 A CN2011103039599 A CN 2011103039599A CN 201110303959 A CN201110303959 A CN 201110303959A CN 102354995 B CN102354995 B CN 102354995B
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- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The invention provides a control method for VQC (voltage quality control) of a transformer substation. The method comprises the following steps of firstly obtaining reactive upper and lower limit values QHmax and QHmin at a high-voltage side and upper and lower limit values VLmax and VLmin of a voltage at a low-voltage side of a transformer for VQC (Voltage Quality Control); monitoring the reactive value QH at the high-voltage side of the current transformer, the voltage value VL at the low-voltage side of the transformer, transformer gear, reactive power compensation equipment switching and position information of relevant circuit breakers and isolating switches; tapping corresponding transformer and controlling the reactive power compensation equipment according to a 21-area chart; when the operating point is located at the ninth area, and when VH is more than VHH, putting a reactor into operation, and if VH is less than VHL, putting a capacitor into operation; if the reactive voltage operating point enters the eighteenth area, and when VH is more than VHH, putting the reactor into operation; and if the reactive voltage operating point enters the nineteenth area and when VH is less than VHL, putting the capacitor into operation. With the adoption of the control method, the reactive voltage adjustments of the lower and upper power grids are effectively linked to perform a coordinated control, so that the situation that the whole power grid adjustment is under-optimized caused by separate controlling of VQC for each transformer substation. The strategy provided in the invention also can be used in an automatic voltage control (AVC) system of the power grid. The invention further provides a control system for VQC of the transformer substation.
Description
Technical field
The present invention relates to the VQC(Voltage Quality Control of transformer station, voltage power-less is controlled) control technology, the control method of especially a kind of VQC of transformer station and control system.
Background technology
At present, the VQC of transformer station control strategy mainly is based on typical nine territory figure control strategies and develops, a lot of colleges and universities, scientific research institutions and supply of equipment enterprise have all carried out the research of various control strategies, mainly contain nine district figure, optimize the nine district figure on nine district figure ,Shi tri-district figure ,Shi five district figure ,Shi seven district figure, fuzzy idle border, based on fuzzy neural network and the VQC control strategy based on operating vector etc.But in actual applications, mainly using 17 district figure control strategies is the master.
The VQC of transformer station control strategy mainly comprises voltage power-less Comprehensive Control mode, voltage first control mode and idle Priority Control Schemes.Mainly there are the following problems for existing 17 district figure control strategy voltage power-less Comprehensive Control modes:
When the upper strata voltage magnitude is higher, as higher than 234.5kV the time, the idle generation on upper strata is more than needed in a large number, is badly in need of lower floor and absorbs unnecessary idle.According to 17 district figure control strategies, if current operating point is positioned at 17 figure 9th district, district (consulting Fig. 1), transformer and reactive-load compensation equipment all are failure to actuate.Can not take full advantage of the unnecessary inductive reactive power compensation equipment of lower floor, absorb the idle of upper strata, reduce the voltage magnitude on upper strata.
When the upper strata voltage magnitude is low, as lower than 222kV the time, the upper strata no-power vacancy is serious, is badly in need of lower floor's electrical network and carries out idle support.According to 17 district figure control strategies, if current operating point is positioned at 17 figure 9th district, district (consulting Fig. 1), transformer and reactive-load compensation equipment all are failure to actuate.Can not take full advantage of the unnecessary capacitive reactive power compensation equipment of lower floor, support upper strata idle, reduce the voltage magnitude on upper strata.
In a word, existing 17 district figure control strategies, main target is that maintenance step down side voltage and high voltage side of transformer are idle in certain scope, if current operating point is positioned at 17 figure 9th district, district, transformer and reactive-load compensation equipment all are failure to actuate.The extreme situation occurred for the upper strata voltage power-less, the idle resource that can not take full advantage of lower floor is improved the reactive voltage of optimizing upper strata, has caused the idle and waste of the idle resource of lower floor.The reactive voltage that is levels is coordinated disconnection to have occurred in Shi seven figure 9th district, district.
Summary of the invention
The object of the present invention is to provide a kind of VQC of transformer station control method, the reactive voltage that can solve levels is coordinated the idle and waste of the Shi seven district figure nine idle resources of district Nei Shi lower floor.
The VQC of transformer station control method provided by the invention comprises step:
Obtain the idle upper lower limit value Q of high voltage side of transformer of VQC
hmax, Q
hminupper lower limit value V with low-pressure side voltage
lmax, V
lmin;
Monitor the idle value Q of current high voltage side of transformer
h, step down side magnitude of voltage V
l, transformer gear, reactive-load compensation equipment switching and relative breaker, isolating switch positional information;
Carry out the control of corresponding transformer tapping and reactive-load compensation equipment according to following predetermined policy:
As (Q
hmin+ Δ Q
q)<=Q
h<(Q
hmax-Δ Q
q) and (V
lmin+ Δ U
q)<=VL<(V
lmax-Δ U
q) time, if V
hv
hH, throw reactor; If V
h<V
hL, throw capacitor;
Work as Q
hmin<=Q
h<(Q
hmax-Δ Q
q) and (V
lmax-Δ U
q)<=V
l<V
lmaxthe time, or work as Q
hmin<=Q
h<(Q
hmin+ Δ Q
q) and (V
lmin+ Δ U
q)<=V
l<(V
lmax-Δ U
q) time, if V
hv
hH, throw reactor;
As (Q
hmin+ Δ Q
q)<=Q
h<Q
hmaxand V
lmin<=V
l<(V
lmin+ Δ U
q) time, or as (Q
hmax-Δ Q
q)<=Q
h<Q
hmaxand (V
lmin+ Δ U
q)<=V
l<(V
lmax-Δ U
q) time, if V
h<V
hLthe time, throw capacitor;
Wherein, V
hHfor the action higher limit of default high voltage side of transformer voltage, V
hLfor the action lower limit of default high voltage side of transformer voltage, Δ Q
qthe idle maximum variable quantity of high voltage side of transformer caused for one group of reactive-load compensation equipment of switching; Δ U
qfor the maximum variable quantity of step down side voltage that one group of reactive-load compensation equipment of switching causes, Δ Q
ufor transformer is regulated one grade of idle maximum variable quantity of the high voltage side of transformer caused, Δ U
ufor the maximum variable quantity of step down side voltage.
The VQC of transformer station control system provided by the invention comprises:
Communication module, for the idle upper lower limit value Q of the high voltage side of transformer that obtains VQC
hmax, Q
hminupper lower limit value V with low-pressure side voltage
lmax, V
lmin;
Configuration module, for the action upper lower limit value V of the high voltage side of transformer voltage that receives user input
hHand V
hL, the maximum variation delta U of the high voltage side of transformer that reactive-load compensation equipment causes is idle maximum variation delta Qq and step down side voltage
q, transformer regulates one grade of idle maximum variation delta Q of the high voltage side of transformer caused
uwith the maximum variation delta U of step down side voltage
u;
Be installed in the supervising device of high voltage side of transformer and low-pressure side, for monitoring the idle Q of current high voltage side of transformer
h, step down side voltage V
l, transformer gear, reactive-load compensation equipment switching and relative breaker, isolating switch positional information, and send to control module;
Described control module, for carry out the control of corresponding transformer tapping and reactive-load compensation equipment according to following predetermined policy:
As (Q
hmin+ Δ Q
q)<=Q
h<(Q
hmax-Δ Q
q) and (V
lmin+ Δ U
q)<=V
l<(V
lmax-Δ U
q) time, if V
hv
hH, throw reactor; If V
h<V
hL, throw capacitor;
Work as Q
hmin<=Q
h<(Q
hmax-Δ Q
q) and (V
lmax-Δ U
q)<=V
l<V
lmaxthe time, or work as Q
hmin<=Q
h<(Q
hmin+ Δ Q
q) and V
lmin+ Δ U
q<=V
l<(V
lmax-Δ U
q) time, if V
hv
hH, throw reactor;
As (Q
hmin+ Δ Q
q)<=Q
h<Q
hmaxand V
lmin<=V
l<(V
lmin+ Δ U
q) time, or as (Q
hmax-Δ Q
q)<=Q
h<Q
hmaxand (V
lmin+ Δ U
q)<=V
l<(V
lmax-Δ U
q) time, if V
h<V
hLthe time, throw capacitor.
When the VQC of transformer station of the present invention adopts voltage power-less Comprehensive Control mode, at the step down side voltage that guarantees current operating point with uprise under the idle qualified prerequisite of side, take full advantage of the idle resource of lower floor, improve the extreme voltage condition in upper strata.When operating point is positioned at the 9th district, and V
hv
hHthe time, throw reactor, if V
h<V
hLthe time, throw capacitor; If the reactive voltage operating point enters 18th district, work as V
hv
hHthe time, throw reactor; 19th district work as V
h<V
hLthe time, throw capacitor.Effectively the reactive voltage of levels electrical network is connected, coordinate to control, avoid the VQC of each transformer station to do things in his own way controlling causing the whole network regulation and control to owe situation about optimizing.This strategy also can be applied in electrical network automatism voltage control (AVC) system and go.
The accompanying drawing explanation
Fig. 1 is the VQCShi of transformer station seven district figure in prior art;
Fig. 2 is the VQC of transformer station 21 figure in the present invention;
The flow chart that Fig. 3 is VQC control method of the present invention;
The logic diagram that Fig. 4 is VQC control system of the present invention.
Embodiment
Refer to Fig. 2, there is shown the transformer station VQC control strategy of VQC control method of the present invention for the coordination optimization of realizing the levels electrical network, adopt voltage power-less Comprehensive Control mode, to having the load tap changer of carrying and reactive-load compensation equipment switching to be controlled, this is controlled the VQC Er Shi of the transformer station mono-district figure proposed by the present invention and realizes.Staff by transformer station obtains the action upper lower limit value V of default high voltage side of transformer voltage according to practical operating experiences
hHand V
hL, the idle maximum variation delta Q of high voltage side of transformer that one group of reactive-load compensation equipment of switching causes
qwith the maximum variation delta U of transformer downside voltage
q, transformer regulates one grade of idle maximum variation delta Q of the high voltage side of transformer caused
uwith the maximum variation delta U of step-down side voltage
uthereby, obtain the area boundary value of this station VQC 21 regional strategy figure.This Er Shi mono-district figure, by step down side voltage V
lhigher limit V
lmaxwith lower limit V
lmin, the high voltage side of transformer reactive power Q
hhigher limit Q
hmaxwith lower limit Q
hmin, the idle maximum variation delta Q of high voltage side of transformer that causes of one group of reactive-load compensation equipment of switching
qwith the maximum variation delta U of step-down side voltage
q, transformer regulates one grade of idle maximum variation delta Q of the high voltage side of transformer caused
uwith the maximum variation delta U of step-down side voltage
uform at Spatial Coupling, form altogether 21 zones, be respectively the 1-21 district.In 1st district-17 district, except 9th district, the division methods in other districts is consistent with the respective area division methods of 17 district figure of the prior art.Wherein 9th district, 18th district, 19th district, 20th district and 21st district are the idle all qualified zones of step down side voltage and high voltage side of transformer, and the bounds in 9th district is: (Q
hmin+ Δ Q
q)<=Q
h<(Q
hmax-Δ Q
q) and (V
lmin+ Δ U
q)<=V
l<(V
lmax-Δ U
q); The bounds in 17th district is: Q
hmax<=Q
hand V
l<=V
lmin; The bounds in 18th district is: Q
hmin<=Q
h<(Q
hmax-Δ Q
q) and (V
lmax-Δ U
q)<=V
l<V
lmax, or Q
hmin<=Q
h<(Q
hmin+ Δ Q
q) and V
lmin+ Δ U
q<=V
l<(V
lmax-Δ U
q); The bounds in 19th district is (Q
hmin+ Δ Q
q)<=Q
h<Q
hmaxand V
lmin<=V
l<(V
lmin+ Δ U
q), or (Q
hmax-Δ Q
q)<=Q
h<Q
hmaxand V
lmin+ Δ U
q<=V
l<(V
lmax-Δ U
q); The bounds in 20th district is (Q
hmax-Δ Q
q)<=Q
h<Q
hmaxand (V
lmax-Δ U
q)<=V
l<V
lmax; The bounds in 21st district is Q
hmin<=Q
h<(Q
hmin+ Δ Q
q) and V
lmin<=V
l<(V
lmin+ Δ U
q).
Fig. 3 is flow chart of the present invention, and as shown in the figure, at first VQC control method of the present invention needs to obtain the idle upper lower limit value Q of high voltage side of transformer that middle tune issues VQC
hmax, Q
hminupper lower limit value V with low-pressure side voltage
lmax, V
lmin(step 1);
Monitor the idle value Q of the high side of current transformer
h, transformer downside magnitude of voltage V
l, transformer gear, reactive-load compensation equipment switching and relative breaker, isolating switch positional information (step 2);
Q according to current transformer operating point
hand V
lbe positioned at which interval of VQC 21 regional strategy figure, carry out the action (step 3): if when the reactive voltage operating point enters the 9th district, and V of corresponding transformer tapping and reactive-load compensation equipment
hv
hHthe time, throw reactor, work as V
h<V
hLthe time, throw capacitor; If the reactive voltage operating point enters 18th district, work as V
hv
hHthe time, throw reactor; Enter 19th district, work as V
h<V
hLthe time, throw capacitor.In addition, as an embodiment, current operating point enters 20th district, is failure to actuate; Current operating point enters 21st district, is failure to actuate.
As an embodiment, the control mode that remaining each district can be identical according to prior art is done as follows respectively:
When operating point is entered 1st district, cut electric capacity; When operating point enters 2nd district, cut electric capacity; When operating point runs to 3rd district, step-down or cut capacitor (as an optimal way, cutting electric capacity preferential) upgrades; When running to 4th district, step-down upgrades; When running to 5th district, step-down upgrades; When running to 6th district, cut electric capacity; Step-down upgrades when running to 7th district; When running to 8th district, cut electric capacity; When running to 10th district, throw electric capacity; When running to 11st district, lower category and boost; When running to 12nd district, throw electric capacity; When running to 13rd district, lower category and boost; When running to 14th district, lower category and boost; When running to 15th district, lower category and boost or throw capacitor (as a preferred embodiment, throwing electric capacity preferential); When running to 16th district, throw electric capacity; When running to 17th district, throw electric capacity.
Fig. 4 is the schematic diagram of the VQC of transformer station control system provided by the invention, and this system comprises communication module, configuration module, monitoring module and control module.Communication module is adjusted the idle upper lower limit value Q of high voltage side of transformer of the VQC issued in being used for receiving in above-mentioned steps 1
hmax, Q
hminupper lower limit value V with low-pressure side voltage
lmax, V
lmin.Configuration module can be used to provide inputting interface, receives the action upper lower limit value V of the staff of transformer station according to the default high voltage side of transformer voltage of practical operating experiences input
hHand V
hL, the idle maximum variation delta Q of high voltage side of transformer that one group of reactive-load compensation equipment of switching causes
qwith the maximum variation delta U of step-down side voltage
q, transformer regulates one grade of idle maximum variation delta Q of the high voltage side of transformer caused
uwith the maximum variation delta U of step-down side voltage
u.Monitoring module is installed in this station high voltage side of transformer and low-pressure side, monitors the current idle Q of side that uprises
h, step-down side voltage V
l, transformer gear, reactive-load compensation equipment switching and relative breaker, isolating switch positional information, then these information are sent in the VQC control module, control module is according to the Q of current operating point
hand V
lbe positioned at which interval of VQC 21 regional strategy figure, carry out the action of corresponding transformer tapping and reactive-load compensation equipment.
In sum, the VQC of the transformer station control strategy of the coordination optimization of realizing the levels electrical network that adopts the present invention to propose, it is idle qualified both can to have guaranteed operating point place step down side voltage and uprise side, can take full advantage of again the idle resource of lower floor, improves the extreme voltage condition in upper strata.
Above-described embodiment is preferably execution mode of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other are any does not deviate from modification, the modification done under Spirit Essence of the present invention and principle, substitute, combination, simplify; all should be equivalent substitute mode, within all protection scope of the present invention should being included in.
Claims (6)
1. the VQC of a transformer station control method, is characterized in that, comprises step:
Obtain the idle upper lower limit value Q of high voltage side of transformer of VQC
hmax, Q
hminupper lower limit value V with low-pressure side voltage
lmax, V
lmin;
Monitor the idle value Q of current high voltage side of transformer
h, step down side magnitude of voltage V
l, transformer gear, reactive-load compensation equipment switching and relative breaker, isolating switch positional information;
Carry out the control of corresponding transformer tapping and reactive-load compensation equipment according to following predetermined policy:
As (Q
hmin+ Δ Q
q)<=Q
h<(Q
hmax-Δ Q
q) and (V
lmin+ Δ U
q)<=V
l<(V
lmax-Δ U
q) time, if V
hv
hH, throw reactor; If V
h<V
hL, throw capacitor;
Work as Q
hmin<=Q
h<(Q
hmax-Δ Q
q) and (V
lmax-Δ U
q)<=V
l<V
lmaxthe time, or work as Q
hmin<=Q
h<(Q
hmin+ Δ Q
q) and (V
lmin+ Δ U
q)<=V
l<(V
lmax-Δ U
q) time, if V
hv
hH, throw reactor;
As (Q
hmin+ Δ Q
q)<=Q
h<Q
hmaxand V
lmin<=V
l<(V
lmin+ Δ U
q) time, or as (Q
hmax-Δ Q
q)<=Q
h<Q
hmaxand (V
lmin+ Δ U
q)<=V
l<(V
lmax-Δ U
q) time, if V
h<V
hLthe time, throw capacitor;
Wherein, V
hHfor the action higher limit of default high voltage side of transformer voltage, V
hLfor the action lower limit of default high voltage side of transformer voltage, Δ Q
qthe idle maximum variable quantity of high voltage side of transformer caused for one group of reactive-load compensation equipment of switching; Δ U
qfor the maximum variable quantity of step down side voltage that one group of reactive-load compensation equipment of switching causes, Δ Q
ufor transformer is regulated one grade of idle maximum variable quantity of the high voltage side of transformer caused, Δ U
ufor the maximum variable quantity of step down side voltage.
2. the VQC of transformer station control method according to claim 1, it is characterized in that: the step of carrying out the control of corresponding transformer tapping and reactive-load compensation equipment according to predetermined policy also comprises:
Work as Q
h<Q
hminand V
l>=V
lmaxthe time, cut electric capacity; Work as Q
hmin<=Q
h<(Q
hmin+ Δ Q
u) and V
l>=V
lmaxthe time, cut electric capacity; As (Q
hmin+ Δ Q
u)<=Q
h<(Q
hmax-Δ Q
q) and V
l>=V
lmaxthe time, step-down or cut capacitor upgrades; As (Q
hmax-Δ Q
q)<=Q
h<Q
hmaxand V
l>=V
lmaxthe time, step-down upgrades; Work as Q
hmax<=Q
hand V
l>=V
lmaxthe time, step-down upgrades; Work as Q
h<Q
hminand (V
lmax-Δ U
u)<=V
l<V
lmaxthe time, cut electric capacity; Work as Q
h>=Q
hmaxand (V
lmax-Δ U
q)<=V
l<V
lmaxthe time, step-down upgrades; Work as Q
h<Q
hminand (V
lmin+ Δ U
q)<=V
l<(V
lmax-Δ U
u) time, cut electric capacity; Work as Q
h>=Q
hmaxand (V
lmin+ Δ U
u)<=V
l<(V
lmax-Δ U
q) time, throw electric capacity; Work as Q
h<Q
hminand V
lmin<=V
l<(V
lmin+ Δ U
q) time, lower category and boost; Work as Q
h>=Q
hmaxand V
lmin<=V
l<(V
lmin+ Δ U
u) time, throw electric capacity; Work as Q
h<Q
hminand V
l<=V
lminthe time, lower category and boost; Work as Q
hmin<=Q
h<(Q
hmin+ Δ Q
q) and V
l<=V
lminthe time, lower category and boost; As (Q
hmin+ Δ Q
q)<=Q
h<(Q
hmax-Δ Q
u) and V
l<=V
lminthe time, lower category and boost or throw capacitor; As (Q
hmax-Δ Q
u)<=Q
h<Q
hmaxand V
l<=V
lminthe time, throw electric capacity; Work as Q
hmax<=Q
hand V
l<=V
lminthe time, throw electric capacity.
3. the VQC of transformer station control method according to claim 2, is characterized in that: as (Q
hmin+ Δ Q
u)<=Q
h<(Q
hmax-Δ Q
q) and V
l>=V
lmaxthe time, capacitor is cut in preferential selection; Or (Q
hmin+ Δ Q
q)<=Q
h<(Q
hmax-Δ Q
u) and V
l<=V
lminthe time, throw capacitor.
4. the VQC of a transformer station control system, is characterized in that, comprising:
Communication module, for the idle upper lower limit value Q of the high voltage side of transformer that obtains VQC
hmax, Q
hminupper lower limit value V with low-pressure side voltage
lmax, V
lmin;
Configuration module, for the action upper lower limit value V of the high voltage side of transformer voltage that receives user input
hHand V
hL, the maximum variation delta U of the high voltage side of transformer that reactive-load compensation equipment causes is idle maximum variation delta Qq and step down side voltage
q, transformer regulates one grade of idle maximum variation delta Q of the high voltage side of transformer caused
uwith the maximum variation delta U of step down side voltage
u;
Be installed in the supervising device of high voltage side of transformer and low-pressure side, for monitoring the idle Q of current high voltage side of transformer
h, step down side voltage V
l, transformer gear, reactive-load compensation equipment switching and relative breaker, isolating switch positional information, and send to control module;
Described control module, for carry out the control of corresponding transformer tapping and reactive-load compensation equipment according to following predetermined policy:
As (Q
hmin+ Δ Q
q)<=Q
h<(Q
hmax-Δ Q
q) and (V
lmin+ Δ U
q)<=V
l<(V
lmax-Δ U
q) time, if V
hv
hH, throw reactor; If V
h<V
hL, throw capacitor;
Work as Q
hmin<=Q
h<(Q
hmax-Δ Q
q) and (V
lmax-Δ U
q)<=V
l<V
lmaxthe time, or work as Q
hmin<=Q
h<(Q
hmin+ Δ Q
q) and (V
lmin+ Δ U
q)<=V
l<(V
lmax-Δ U
q) time, if V
hv
hH, throw reactor;
As (Q
hmin+ Δ Q
q)<=Q
h<Q
hmaxand V
lmin<=V
l<(V
lmin+ Δ U
q) time, or as (Q
hmax-Δ Q
q)<=Q
h<Q
hmaxand (V
lmin+ Δ U
q)<=V
l<(V
lmax-Δ U
q) time, if V
h<V
hLthe time, throw capacitor.
5. the VQC of transformer station control system according to claim 4, it is characterized in that: described control module is also for working as Q
h<Q
hminand V
l>=V
lmaxthe time, cut electric capacity; Work as Q
hmin<=Q
h<(Q
hmin+ Δ Q
u) and V
l>=V
lmaxthe time, cut electric capacity; As (Q
hmin+ Δ Q
u)<=Q
h<(Q
hmax-Δ Q
q) and V
l>=V
lmaxthe time, step-down or cut capacitor upgrades; As (Q
hmax-Δ Q
q)<=Q
h<Q
hmaxand V
l>=V
lmaxthe time, step-down upgrades; Work as Q
hmax<=Q
hand V
l>=V
lmaxthe time, step-down upgrades; Work as Q
h<Q
hminand (V
lmax-Δ U
u)<=V
l<V
lmaxthe time, cut electric capacity; Work as Q
h>=Q
hmaxand (V
lmax-Δ U
q)<=V
l<V
lmaxthe time, step-down upgrades; Work as Q
h<Q
hminand (V
lmin+ Δ U
q)<=V
l<(V
lmax-Δ U
u) time, cut electric capacity; Work as Q
h>=Q
hmaxand (V
lmin+ Δ U
u)<=V
l<(V
lmax-Δ U
q) time, throw electric capacity; Work as Q
h<Q
hminand V
lmin<=V
l<V
lmin+ Δ U
q) time, lower category and boost; Work as Q
h>=Q
hmaxand V
lmin<=V
l<(V
lmin+ Δ U
u) time, throw electric capacity; Work as Q
h<Q
hminand V
l<=V
lminthe time, lower category and boost; Work as Q
hmin<=Q
h<(Q
hmin+ Δ Q
q) and V
l<=V
lminthe time, lower category and boost; As (Q
hmin+ Δ Q
q)<=Q
h<(Q
hmax-Δ Q
u) and V
l<=V
lminthe time, lower category and boost or throw capacitor; As (Q
hmax-Δ Q
u)<=Q
h<Q
hmaxand V
l<=V
lminthe time, throw electric capacity; Work as Q
hmax<=Q
hand V
l<=V
lminthe time, throw electric capacity.
6. the VQC of transformer station control system according to claim 5 is characterized in that: described control module is as (Q
hmin+ Δ Q
u)<=Q
h<(Q
hmax-Δ Q
q) and V
l>=V
lmaxthe time, capacitor or (Q are cut in preferential selection
hmin+ Δ Q
q)<=Q
h<(Q
hmax-Δ Q
u) and V
l<=V
lminthe time, throw capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103039599A CN102354995B (en) | 2011-09-28 | 2011-09-28 | Control method and control system for VQC (voltage quality control) of transformer substation |
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| CN103972902B (en) * | 2014-04-11 | 2016-03-30 | 广州供电局有限公司 | The power-less compensation control method of low-voltage distribution network and device |
| CN104201683B (en) * | 2014-09-11 | 2017-02-15 | 南京南瑞继保电气有限公司 | Flexible direct-current transmission system coupled transformer tap adjusting method |
| CN104868484B (en) * | 2015-05-26 | 2017-06-20 | 华南理工大学 | Powerless control method is coordinated up and down by 220/110kV transformer stations |
| CN105429151B (en) * | 2015-12-20 | 2018-01-16 | 华南理工大学 | A kind of transformer station's VQC control methods for considering side voltage security in becoming |
| CN107230987A (en) * | 2017-07-27 | 2017-10-03 | 广东电网有限责任公司惠州供电局 | A kind of distribution network var compensation Regional Synergetic control system based on mixing reactive power compensator |
| CN108242811B (en) * | 2018-03-09 | 2019-10-29 | 广东电网有限责任公司汕头供电局 | A kind of alternating current-direct current paired running receiving-end system VQC control method |
| CN109950909B (en) * | 2019-04-02 | 2020-09-29 | 国家电网有限公司 | AVC system optimization control method based on real-time power flow algorithm |
| CN112865116B (en) * | 2021-01-11 | 2022-04-12 | 广西大学 | Thirteen-area diagram reactive power optimization method of parallel federal diagram neural network |
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