CN104868484A - 220/110kV transformer station upper-lower coordination wattless control method - Google Patents
220/110kV transformer station upper-lower coordination wattless control method Download PDFInfo
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Abstract
The invention provides a 220/110kV transformer station upper-lower coordination wattless control method comprising following steps: obtaining power grid parameters of a regional power grid; calculating an upper-lower coordination limit value; determining an upper-lower coordination state according to hysteretic characteristics; selecting a corresponding upper-lower coordination strategy according to the upper-lower coordination state. The method is applied to wattless support from a 110kV transformer station to a 220kV transformer station in the regional power grid, can effectively use resting reactive compensation equipment in the regional power grid, so gateway reactive power of the 220kV transformer station in the regional power grid can better suit the requirements of an upper level power grid.
Description
Technical field
The present invention relates to the idle operation method of electric power system, particularly the powerless control method of 220kV transformer station is coordinated by a kind of 110kV transformer station based on hysteretic characteristic.
Background technology
In AC network, reactive power plays very crucial effect to the fail safe of electrical network and economy.The flowing of reactive power in electrical network, can cause voltage-drop and active power loss.In order to ensure operation voltage level and reduce active power loss, idle control is a vital task of grid company.
Provincial power network traffic department, in order to the idle control effects of provincial power network, generally can propose critical point Reactive Power Control requirement to the 220kV transformer station in regional power grid scheduling department compass of competency, namely provide the critical point reactive power allowed band of 220kV transformer station.
At present, area power grid generally adopts the method controlled on the spot, and namely the reactive requirement of 220kV transformer station is met by the reactive-load compensation equipment of 220kV transformer station self.Although the method controlled on the spot this is simple, when 220kV Substation Reactive-power Compensation equipment is used up, can not effectively utilize the remaining reactive-load compensation equipment of 110kV transformer station.Now more existing AVC systems start to introduce the strategy coordinated, but these strategies are often independent of the another set of strategy controlled on the spot, therefore easily clash with existing control strategy on the spot, cause the problem of reactive-load compensation equipment switching repeatedly.
In sum, existing coordination powerless control method also needs further improvement.
Summary of the invention
The object of the invention is to solve the problem that existing power-less optimized controlling method cannot be coordinated mutually, what aim to provide a kind of practicality coordinates powerless control method in real time up and down.
The present invention proposes a kind of 220/110kV transformer station and coordinates powerless control method up and down, comprises the following steps:
(1) area power grid parameter is obtained; Described area power grid comprise a 220kV transformer station and with 110kV transformer station; Described area power grid parameter comprises: the transformer gear upper and lower bound in the reactive-load compensation equipment list pool-size in each transformer station title, each transformer station and quantity, each transformer station, the critical point reactive power allowed band of each transformer station and low-voltage bus bar voltage allowed band; Create array CORD, for depositing 110kV transformer station name of station 220kV transformer station being carried out to idle coordination, the initial value of CORD is empty array;
(2) coordination limit value Q is up and down calculated
cord.max1, Q
cord.max2, Q
cord.min1and Q
cord.min2:
(3) the reactive power/voltage control situation of area power grid is obtained; Described reactive power/voltage control situation comprises: the critical point reactive power of 110kV transformer station and 220kV transformer station, low-voltage bus bar voltage, transformer current gear and reactive-load compensation equipment input group number, wherein the critical point reactive power Q of 220kV transformer station
220represent;
(4) Q is judged
220with Q
cord.max1, Q
cord.max2, Q
cord.min1and Q
cord.min2magnitude relationship, determine upper and lower correlated state according to hysteretic characteristic; Upper and lower correlated state is used to the condition selecting upper and lower coordination control strategy, comprises startup, is failure to actuate, removes three kinds of states; If correlated state is for starting up and down, then enter step (5); If correlated state is for removing up and down, then enter step (6); If correlated state is for being failure to actuate up and down, then enter step (7);
(5) if Q
220>Q
cord.max1the all 110kV transformer stations then step (1) got remove 110kV transformer station corresponding to the name of station left in CORD, from remaining 110kV transformer station, select critical point reactive power qualified and the reactor that do not excise and the maximum transformer station of the capacitor total capacity that do not drop in station, the upper and lower bound in the critical point reactive power allowed band of this 110kV transformer station is all reduced Q
110.com.max, order about this 110kV transformer station and drop into capacitor or excise reactor to compensate a part of reactive power of 220kV transformer station, Q
110.com.maxrepresent the maximum single pool-size of 110kV Substation Reactive-power Compensation equipment in area power grid, and this 110kV transformer station name of station is increased to the last of CORD, enter step (7); If Q
220<Q
cord.min1the all 110kV transformer stations then step (1) got remove 110kV transformer station corresponding to the name of station left in CORD, from remaining 110kV transformer station, select critical point reactive power qualified and the capacitor that do not excise and the maximum transformer station of the reactor total capacity that do not drop in station, the upper and lower bound in the critical point reactive power allowed band at this station is all increased Q
110.com.max, order about this 110kV transformer station and drop into reactor or excise capacitor to compensate a part of reactive power of 220kV transformer station, and this 110kV transformer station name of station is increased to the last of CORD, enter step (7);
(6) if CORD is empty array, then step (7) is entered; If CORD is not empty array, last element of inquiry CORD, the critical point reactive power allowed band of the 110kV transformer station represented by this element is set to the critical point reactive power allowed band of this 110kV transformer station obtained in step (1), and deletes last element of CORD;
(7) according to the nine-zone diagram strategy that current AVC is conventional, 110kV transformer station, 220kV transformer station are controlled;
(8) terminate this cycle and coordinate idle control up and down; Wait for setting-up time, return step (3).
Above-mentioned 220/110kV transformer station is coordinated in powerless control method up and down, and described upper and lower cooperation control, refers to the reactive-load compensation equipment utilizing 110kV transformer station, and the one coordinating the reactive requirement compensating 220kV transformer station controls.
Above-mentioned 220/110kV transformer station is coordinated in powerless control method up and down, and described critical point refers to the boundary of power equipment assets and management scope between regional grid, generally using high-voltage side bus place of transformer station as critical point.
Above-mentioned 220/110kV transformer station is coordinated in powerless control method up and down, describedly coordinates limit value up and down, refers to the condition for judging upper and lower correlated state, coordinates limit value Q up and down
cord.max1, Q
cord.max2, Q
cord.min1and Q
cord.min2obtained by formula (1):
Q
cord.max1＝Q
220.max+Q
110.com.max
Q
cord.max2＝Q
220.max-Q
110.com.max(1)
Q
cord.min1＝Q
220.min-Q
110.com.max
Q
cord.min2＝Q
220.min+Q
110.com.max
Formula (1) comprises variable: 220kV transformer station critical point reactive power allowed band upper limit Q
220.maxwith lower limit Q
220.min; The maximum single pool-size Q of 110kV Substation Reactive-power Compensation equipment in area power grid
110.com.max.
Above-mentioned 220/110kV transformer station is coordinated in powerless control method up and down, described hysteretic characteristic refers to the relation that 220kV transformer station critical point reactive power and upper and lower correlated state are formed, and the relation of 220kV transformer station critical point reactive power and upper and lower correlated state is specific as follows:
(1) Q is worked as
220>Q
cord.max1, and the reactor do not excised in 220kV transformer station and do not drop into capacitor time, upper and lower correlated state is set to open;
(2) Q is worked as
220<Q
cord.min1, and the capacitor do not excised in 220kV transformer station and do not drop into reactor time, upper and lower correlated state is set to open;
(3) Q is worked as
cord.min2<Q
220<Q
cord.max2time, upper and lower correlated state is set to remove;
(4) do not meet (1) ~ condition of (3) time, upper and lower correlated state is set to be failure to actuate.
Above-mentioned 220/110kV transformer station is coordinated in powerless control method up and down, described nine-zone diagram strategy, it is a kind of conventional strategy utilizing transformer station's low-voltage bus bar voltage of Real-Time Monitoring and critical point reactive power to control transformer station's gear and reactive-load compensation equipment, its basis for estimation is 9 controlled areas formed based on the bound of low-voltage bus bar voltage and critical point reactive power, when low-voltage bus bar voltage exceeds allowed band [U
min, U
max] or critical point reactive power exceed allowed band [Q
min, Q
max] time, control system adjusts according to predetermined instruction, and each district action scheme is as follows:
1st district: low-voltage bus bar voltage is greater than U
max, critical point reactive power is less than Q
min, excision capacitor or drop into reactor, when capacitor complete resection and after reactor all drops into, low-voltage bus bar voltage is still greater than U
maxtime, reduce load tap changer gear;
2nd district: low-voltage bus bar voltage is greater than U
max, critical point reactive power is qualified, and reduce load tap changer gear, when tap gear is modulated to deep low gear, low-voltage bus bar voltage is still greater than U
maxtime, excision capacitor or input reactor;
3rd district: low-voltage bus bar voltage is greater than U
max, critical point reactive power is greater than Q
max, reduce load tap changer gear, when tap gear is modulated to deep low gear, low-voltage bus bar voltage is still greater than U
maxtime, excision capacitor or input reactor;
4th district: low-voltage bus bar voltage is qualified, critical point reactive power is less than Q
min, excision capacitor or drop into reactor, when capacitor complete resection and after reactor all drops into, operating point Reng Gai district, then maintain this operating point;
5th district: low-voltage bus bar voltage is qualified, critical point reactive power is qualified, maintains this operating point;
6th district: low-voltage bus bar voltage is qualified, critical point reactive power is greater than Q
max, drop into capacitor or excision reactor, when capacitor all drops into and after reactor complete resection, operating point Reng Gai district, then maintain this operating point;
7th district: low-voltage bus bar voltage is less than U
min, critical point reactive power is less than Q
min, raise load tap changer gear, when tap gear is modulated to after the most high-grade, low-voltage bus bar voltage is still less than U
mintime, drop into capacitor or excision reactor;
8th district: low-voltage bus bar voltage is less than U
min, idle qualified, raise load tap changer gear, when tap gear is modulated to after the most high-grade, drop into capacitor or excision reactor;
9th district: low-voltage bus bar voltage is less than U
min, critical point reactive power is greater than Q
max, drop into capacitor or excision reactor, when capacitor all drops into and after reactor complete resection, low-voltage bus bar voltage is still less than U
mintime, raise load tap changer gear.
Compared with prior art, beneficial effect of the present invention is:
(1) transfer the reactive-load compensation equipment of 110kV transformer station, coordinate the reactive requirement compensating 220kV transformer station, remaining reactive-load compensation equipment in area power grid can be effectively utilized;
(2) coordination control strategy is simply clear and definite, and the basis of control strategy is on the spot improved, and can not cause policy conflict thus cause the problem of equipment switching repeatedly.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet that the 220kV/110kV transformer station based on hysteretic characteristic provided by the invention coordinates powerless control method up and down.
Fig. 2 is the hysteretic characteristic curve of upper and lower correlated state-upper and lower harmony value.
Fig. 3 is somewhere electrical network schematic diagram.
Embodiment
Below in conjunction with accompanying drawing and example, specific embodiment of the invention is described further.
Fig. 1 220kV/110kV transformer station reflected based on hysteretic characteristic coordinates the idiographic flow of powerless control method up and down.Specifically comprise:
(1) area power grid parameter is obtained; Described area power grid comprise a 220kV transformer station and with 110kV transformer station; Described area power grid parameter comprises: the transformer gear upper and lower bound in the reactive-load compensation equipment list pool-size in the title of each transformer station, each transformer station and quantity, each transformer station, the critical point reactive power allowed band of each transformer station and low-voltage bus bar voltage allowed band; Create array CORD, for depositing 110kV transformer station name of station 220kV transformer station being carried out to idle coordination, the initial value of CORD is empty array;
(2) coordination limit value Q is up and down calculated
cord.max1, Q
cord.max2, Q
cord.min1and Q
cord.min2;
Q
cord.max1, Q
cord.max2, Q
cord.min1and Q
cord.min2obtained by formula (1):
Q
cord.max1＝Q
220.max+Q
110.com.max
Q
cord.max2＝Q
220.max-Q
110.com.max(1)
Q
cord.min1＝Q
220.min-Q
110.com.max
Q
cord.min2＝Q
220.min+Q
110.com.max
Formula (1) comprises variable: 220kV transformer station critical point reactive power allowed band upper limit Q
220.maxwith lower limit Q
220.min; The maximum single pool-size Q of 110kV Substation Reactive-power Compensation equipment in area power grid
110.com.max;
(3) the reactive power/voltage control situation of area power grid is obtained; Described reactive power/voltage control situation comprises: the critical point reactive power of 110kV transformer station and 220kV transformer station, low-voltage bus bar voltage, transformer current gear and reactive-load compensation equipment input group number, wherein the critical point reactive power Q of 220kV transformer station
220represent;
(4) Q is judged
220with Q
cord.max1, Q
cord.max2, Q
cord.min1and Q
cord.min2magnitude relationship, determine upper and lower correlated state according to hysteretic characteristic; Upper and lower correlated state is used to the condition selecting upper and lower coordination control strategy, comprises startup, is failure to actuate, removes three kinds of states; If correlated state is for starting up and down, then enter step (5); If correlated state is for removing up and down, then enter step (6); If correlated state is for being failure to actuate up and down, then enter step (7);
The defining method of upper and lower correlated state is as follows:
A. Q is worked as
220>Q
cord.max1, and the reactor do not excised in 220kV transformer station and do not drop into capacitor time, upper and lower correlated state is set to open;
B. Q is worked as
220<Q
cord.min1, and the capacitor do not excised in 220kV transformer station and do not drop into reactor time, upper and lower correlated state is set to open;
C. Q is worked as
cord.min2<Q
220<Q
cord.max2time, upper and lower correlated state is set to remove;
When d. not meeting the condition of a, b, c, upper and lower correlated state is set to be failure to actuate;
Upper and lower correlated state and upper and lower harmony value form a kind of relation of hysteretic characteristic, and Fig. 2 gives the hysteretic characteristic curve of upper and lower correlated state-upper and lower harmony value;
(5) if Q
220>Q
cord.max1the all 110kV transformer stations then step (1) got remove 110kV transformer station corresponding to the name of station left in CORD, from remaining 110kV transformer station, select critical point reactive power qualified and the reactor that do not excise and the maximum transformer station of the capacitor total capacity that do not drop in station, the upper and lower bound in the critical point reactive power allowed band of this 110kV transformer station is all reduced Q
110.com.max, Q
110.com.maxrepresent the maximum single pool-size of 110kV Substation Reactive-power Compensation equipment in area power grid, and this 110kV transformer station name of station is increased to the last of CORD, enter step (7); If Q
220<Q
cord.min1the all 110kV transformer stations then step (1) got remove 110kV transformer station corresponding to the name of station left in CORD, from remaining 110kV transformer station, select critical point reactive power qualified and the capacitor that do not excise and the maximum transformer station of the reactor total capacity that do not drop in station, the upper and lower bound in the critical point reactive power allowed band at this station is all increased Q
110.com.max, and this 110kV transformer station name of station is increased to the last of CORD, enter step (7);
(6) if CORD is empty array, then step (7) is entered; If CORD is not empty array, last element of inquiry CORD, the critical point reactive power allowed band of the 110kV transformer station represented by this element is set to the critical point reactive power allowed band of this 110kV transformer station obtained in step (1), and deletes last element of CORD;
(7) according to the nine-zone diagram strategy that current AVC is conventional, 110kV transformer station, 220kV transformer station are controlled;
(8) terminate this cycle and coordinate idle control up and down; Wait for next control cycle (as 15 minutes), return step (3).
Be below an example of the inventive method, emulate for somewhere electrical network, Fig. 3 shows the topological structure of this electrical network, and in figure, A represents 220kV transformer station title, and B1, B2, B3, B4, B5 represent the title of 110kV transformer station respectively.
(1) known by Fig. 3, this area's electrical network has 1 220kV transformer station A, and transformer station A is with 5 110kV transformer stations, and title is respectively B1, B2, B3, B4, B5; This area's electrical network does not configure reactor, single pool-size of capacitor and quantity as shown in table 1;
Single pool-size of table 1 capacitor and quantity
Transformer gear upper and lower bound in each transformer station is as shown in table 2;
Table 2 transformer gear upper and lower bound
| Transformer station | The gear upper limit | Gear lower limit | Transformer station | The gear upper limit | Gear lower limit |
| A | 5 | 1 | B3 | 17 | 1 |
| B1 | 17 | 1 | B4 | 17 | 1 |
| B2 | 17 | 1 | B5 | 17 | 1 |
The critical point reactive power allowed band of each transformer station and low-voltage bus bar voltage allowed band as shown in table 3;
Table 3 critical point reactive power allowed band and low-voltage bus bar voltage allowed band
Set up an empty array CORD;
(2) coordination limit value Q is up and down calculated
cord.max1, Q
cord.max2, Q
cord.min1and Q
cord.min2;
Q
cord.max1＝Q
220.max+Q
110.com.max＝8+4Mvar＝12Mvar
Q
cord.max2＝Q
220.max-Q
110.com.max＝8-4Mvar＝4Mvar
Q
cord.min1＝Q
220.min-Q
110.com.max＝-8-4Mvar＝-12Mvar
Q
cord.min2＝Q
220.min+Q
110.com.max＝-8+4Mvar＝-4Mvar
In above formula, Q
220.max, Q
220.minbe respectively the 220kV transformer station critical point reactive power allowed band upper limit, lower limit; Q
110.com.maxfor the maximum single pool-size of 110kV Substation Reactive-power Compensation equipment in area power grid.
(3) at a certain control cycle, the critical point reactive power of 110kV transformer station and 220kV transformer station, low-voltage bus bar voltage, transformer current gear and reactive-load compensation equipment input group number is obtained as shown in table 4; In this embodiment, reactive-load compensation equipment refers to capacitor;
Table 4 reactive power/voltage control situation
Q is known by table
220=12.38Mvar;
(4) Q is judged to obtain
220>Q
cord.max1, and the capacitor do not dropped in 220kV transformer station (this area's electrical network does not configure reactor), therefore upper and lower correlated state is set to start;
(5) Q is judged to obtain
220>Q
cord.max1and now CORD is empty, qualified and the capacitor total capacity do not dropped into maximum (this area's electrical network does not configure reactor) of transformer station B2 critical point reactive power is selected to obtain in all 110kV transformer stations, the capacitor of surplus 3 groups of 4Mvar does not drop into, and therefore the critical point reactive power allowed band upper and lower bound of transformer station B2 is all reduced Q
110.com.max(namely reducing 4Mvar), and transformer station's B5 name of station is increased in CORD;
After this step completes, the critical point reactive power allowed band of transformer station B2 is [-8,0] Mvar, CORD={B2};
The nine-zone diagram strategy conventional according to current AVC controls 110kV transformer station, 220kV transformer station, and controlling result is 110kV transformer station B2 many inputs one group capacitor, and other transformer stations are failure to actuate.
The idle control of coordination up and down of other control cycles can be carried out according to the proposed method, repeats no more herein.
After coordinating idle control up and down, compared to the idle on the spot control do not coordinated up and down, 110kV transformer station B2 has dropped into the capacitor of one group of 4Mvar more, and table 5 gives the critical point reactive power contrast of 220kV transformer station A under two kinds of powerless control methods.
The critical point reactive power contrast of 220kV transformer station A under table 5 two kinds of powerless control methods
| Idle control on the spot | Coordinate idle control up and down | |
| Critical point reactive power | 12.38Mvar | 8.22Mvar |
As shown in Table 5, when adopting independent powerless control method, the reactive-load compensation equipment of 110kV transformer station cannot be supported 220kV transformer station, and it is far away that the critical point reactive power of 220kV transformer station departs from allowed band; And when adopting the powerless control method of coordination up and down of the present invention, the reactive-load compensation equipment of 110kV transformer station can be supported 220kV transformer station, the reactive power sent under compensating 220kV substation section, makes the critical point reactive power of 220kV transformer station closer to allowed band.And, it can also be seen that from the data table, coordinating in powerless control method up and down, after 110kV transformer station supports 220kV transformer station, the critical point reactive power of 220kV transformer station makes upper and lower correlated state be in the interval of being failure to actuate, thus avoids the situation of repetitive control.
Above-described embodiment is the present invention's preferably execution mode; but embodiments of the present invention are not restricted to the described embodiments; other are any do not deviate from Spirit Essence of the present invention and principle under do amendment, modification, substitute, combination, to simplify; all should be the substitute mode of equivalence, all should be included within protection scope of the present invention.
Claims (3)
- Powerless control method is coordinated up and down by 1.220/110kV transformer station, it is characterized in that comprising the following steps:(1) area power grid parameter is obtained; Described area power grid comprise a 220kV transformer station and with 110kV transformer station; Described area power grid parameter comprises: the transformer gear upper and lower bound in the reactive-load compensation equipment list pool-size in the title of each transformer station, each transformer station and quantity, each transformer station, the critical point reactive power allowed band of each transformer station and low-voltage bus bar voltage allowed band; Create array CORD, for depositing 110kV transformer station name of station 220kV transformer station being carried out to idle coordination, the initial value of CORD is empty array;(2) coordination limit value Q is up and down calculated cord.max1, Q cord.max2, Q cord.min1and Q cord.min2;(3) the reactive power/voltage control situation of area power grid is obtained; Described reactive power/voltage control situation comprises: the critical point reactive power of 110kV transformer station and 220kV transformer station, low-voltage bus bar voltage, transformer current gear and reactive-load compensation equipment input group number, wherein the critical point reactive power Q of 220kV transformer station 220represent;(4) Q is judged 220with Q cord.max1, Q cord.max2, Q cord.min1and Q cord.min2magnitude relationship, determine upper and lower correlated state according to hysteretic characteristic; Upper and lower correlated state is used to the condition selecting upper and lower coordination control strategy, comprises startup, is failure to actuate, removes three kinds of states; If correlated state is for starting up and down, then enter step (5); If correlated state is for removing up and down, then enter step (6); If correlated state is for being failure to actuate up and down, then enter step (7);(5) if Q 220>Q cord.max1the all 110kV transformer stations then step (1) got remove 110kV transformer station corresponding to the name of station left in CORD, from remaining 110kV transformer station, select critical point reactive power qualified and the reactor that do not excise and the maximum transformer station of the capacitor total capacity that do not drop in station, the upper and lower bound in the critical point reactive power allowed band of this 110kV transformer station is all reduced Q 110.com.max, Q 110.com.maxrepresent the maximum single pool-size of 110kV Substation Reactive-power Compensation equipment in area power grid, and this 110kV transformer station name of station is increased to the last of CORD, enter step (7); If Q 220<Q cord.min1the all 110kV transformer stations then step (1) got remove 110kV transformer station corresponding to the name of station left in CORD, from remaining 110kV transformer station, select critical point reactive power qualified and the capacitor that do not excise and the maximum transformer station of the reactor total capacity that do not drop in station, the upper and lower bound in the critical point reactive power allowed band at this station is all increased Q 110.com.max, and this 110kV transformer station name of station is increased to the last of CORD, enter step (7);(6) if CORD is empty array, then step (7) is entered; If CORD is not empty array, last element of inquiry CORD, the critical point reactive power allowed band of the 110kV transformer station represented by this element is set to the critical point reactive power allowed band of this 110kV transformer station obtained in step (1), and deletes last element of CORD;(7) according to the nine-zone diagram strategy that current automatism voltage control (AVC) is conventional, 110kV transformer station, 220kV transformer station are controlled;(8) terminate this cycle and coordinate idle control up and down; Wait for setting-up time, return step (3).
- 2. powerless control method is coordinated up and down by 220/110kV transformer station according to claim 1, it is characterized in that: describedly coordinate limit value up and down, refers to the condition for judging upper and lower correlated state, coordinates limit value Q up and down cord.max1, Q cord.max2, Q cord.min1and Q cord.min2obtained by formula (1):Q cord.max1＝Q 220.max+Q 110.com.maxQ cord.max2＝Q 220.max-Q 110.com.max(1)Q cord.min1＝Q 220.min-Q 110.com.maxQ cord.min2＝Q 220.min+Q 110.com.maxFormula (1) comprises variable: 220kV transformer station critical point reactive power allowed band upper limit Q 220.maxwith lower limit Q 220.min; The maximum single pool-size Q of 110kV Substation Reactive-power Compensation equipment in area power grid 110.com.max.
- 3. powerless control method is coordinated up and down by 220/110kV transformer station according to claim 1, it is characterized in that: described hysteretic characteristic refers to the relation that 220kV transformer station critical point reactive power and upper and lower correlated state are formed, and the relation of 220kV transformer station critical point reactive power and upper and lower correlated state is specific as follows:(3.1) Q is worked as 220>Q cord.max1, and the reactor do not excised in 220kV transformer station and do not drop into capacitor time, upper and lower correlated state is set to open;(3.2) Q is worked as 220<Q cord.min1, and the capacitor do not excised in 220kV transformer station and do not drop into reactor time, upper and lower correlated state is set to open;(3.3) Q is worked as cord.min2<Q 220<Q cord.max2time, upper and lower correlated state is set to remove;(3.4) do not meet (3.1) ~ condition of (3.3) time, upper and lower correlated state is set to be failure to actuate.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106532729A (en) * | 2016-12-14 | 2017-03-22 | 云南电网有限责任公司电力科学研究院 | Province-regional coordination control method for 220kV collection substation high-voltage bus voltage |
| CN108667032A (en) * | 2018-04-18 | 2018-10-16 | 华南理工大学 | D-STATCOM reactive voltage control methods for distributed generation resource |
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| CN108667032A (en) * | 2018-04-18 | 2018-10-16 | 华南理工大学 | D-STATCOM reactive voltage control methods for distributed generation resource |
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| CN104868484B (en) | 2017-06-20 |
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