CN102664463B - Realization method for online control strategies of security control device with self-adaption running modes - Google Patents
Realization method for online control strategies of security control device with self-adaption running modes Download PDFInfo
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Abstract
The invention relates to a realization method for online control strategies of a security control device with self-adaption running modes. The method comprises the following steps of: automatically recognizing running modes through the security control device, and matching and checking with definite values of online strategies including a plurality of running modes obtained through calculation at a scheduling end; when the running mode changes and the scheduling end can not calculate in time and issue new online strategy, automatically matching the definite value of the online strategy running in the device according to the changed running mode by the device, and once new fault occurs, enabling the security control device to operate according to the definite value of the online strategy matched with the current running mode. By utilizing the method, the adaptability of the definite value of the online strategies of the security device to the running modes is improved.
Description
Technical field
The invention belongs to power system automatic field, relate more specifically to a kind of operational mode adaptive security control device On-line Control strategy implementation method.
Background technology
Safety stabilization control system is the important component part ensureing power network safety operation, and security and stability control strategy is then the core of safety stabilization control system.Mode computing staff or concurrent computational system are according to research power network topology and ruuning situation, calculate on basis at a large amount of Stability Numerical Analysis, the control strategy of each forecast failure calculated and relevant information thereof are stored in historical data base in the specific format.Control scheme list is as the main manifestations mode of security and stability control strategy, and main contents comprise operational mode, failure mode, trend mode, this Four types information of control measure, specifically describe as follows:
(1) operational mode.Selected some electric network element (as unit, main transformer, circuit) includes operational mode set in, and the state of each element represents with Boolean, puts into operation as "True", and fault is stopped transport or maintenance is stopped transport is "false".When wherein some or certain several element is stopped transport, namely think that electrical network occurs a kind of " element shut down condition ".
(2) failure mode.By specifying some element generation specified type faults respectively, structure forecast failure collection, such as, and a line down tripping operation in double loop, another loop line fault-free trip in the short time, or section disconnection etc.
(3) trend mode.Some variable selected includes tidal characteristics duration set in, such as, and the active power of circuit or section, the busbar voltage etc. of load-center substation.The state of the characteristic quantity set of these variablees composition, determines system load flow mode.
(4) control measure.Mode computing staff or concurrent computational system are by calculating the stability contorting amount provided for a certain forecast failure, and such as, the power of the assembling unit cut by connection, or connection cutting load power etc.
At present, that at home and abroad electrical network is widely applied is the Off-line control Policy Table formulated by offline mode, according to the forecast failure type under the various operational mode that may occur, drawn under various fault compound mode as maintaining the control measure required for system stability by calculated off-line, analytic induction result of calculation, arrange generation strategy table, leave in stabilization control device, search the measure of coupling stability contorting in order to security control device.
The subject matter adopting Off-line control Policy Table to exist is:
(1) due to the control scheme list finite capacity of offline design, all-network structure and the operational mode of actual electric network can not be considered, thus can only by section tidal current and more serious operational mode com-piling method table when designing, in actual motion, probably occur that larger mistake is cut, economic performance is poor.
(2) control scheme list of offline design is mainly for the operational mode occurred during normal operation, and the power system operating mode after multiple faults is occurred in succession, then there is mismatch phenomenon, cause stabilizing control system not play a role, thus affect the safety and stability of operation of power networks.
Domestic and international some large-scale blackout reflect tradition with the emergence control based on " off-line decision-premaking; real-time matching " technology can not adapt to multiple faults in succession occur after power system operating mode, in the urgent need to the online Safety system of one based on " on-line pre-decision system, real-time matching " technology.Online Safety system timing acquiring runs the operating condition of electrical network, regularly (as 5 minutes) carry out the computational analysis of forecast accident, the given fault set of fast search, meet certain system stability margin value, control the control strategy of Least-cost, and be issued to on-the-spot security control device, as the countermeasure in the next time period.Once fault occurs, on-the-spot security control device carries out action by the strategy of on-line definite value regularly refreshed, compared with adopting the way of Off-line control strategy, under identical operational mode and failure mode, by using the trend mode definite value of on line refreshable, can not cut or cut unit or load less, thus improve economical operation performance, effectively can avoid the generation of large-scale blackout simultaneously.
For the tactful definite value realizing security control device upgrades, need the communication realizing security control device and dispatching terminal.Communication modes can take Ethernet mutual contact mode, and the network transmission protocol can adopt TCP/IP transmission means.Can integrated data network be adopted when concrete power grid application, also can select 2M designated lane.From Internet Transmission reliability and rapidity requirement, preferred 2M designated lane.
Usually when online design Safety system, only consider dispatching terminal carry out line computation, be created on line traffic control strategy time electrical network residing for operational mode, there is certain deficiency in this way: when grid collapses causes operational mode to change, because dispatching terminal needs to trigger according to fault to re-start strategy of on-line calculating, and issue new strategy of on-line definite value; This process needs several minutes usually, and during this period of time once new fault occurs electrical network, by the operational mode causing security control device can not mate with strategy of on-line definite value when starting, off-line strategy definite value mode can only be switched to, carry out action according to the off-line strategy definite value of device inside, thus sacrifice the economy and adaptability that adopt strategy of on-line definite value to bring.
Summary of the invention
Above-mentionedly to change in operational mode to overcome, dispatching terminal not yet has enough time to calculate and issues new strategy of on-line, thus cause device can only switch to this defect of off-line strategy definite value mode owing to lacking the operational mode of coupling, the present invention proposes a kind of operational mode adaptive security control device On-line Control strategy implementation method, by the automatic identification of device to operational mode, and mate with the strategy of on-line definite value containing multiple operational mode that dispatching terminal calculates online, when operational mode changes, dispatching terminal not yet has enough time to calculate and issues new strategy of on-line timer can automatically according to the corresponding strategy of on-line definite value run in the operational mode coalignment after change, improve the adaptability of strategy of on-line definite value to operational mode, thus online Safety system can be given full play at lifting power grid security, reliably, the effect of economical operation aspect.
The present invention is concrete by the following technical solutions.
A kind of operational mode adaptive security control device On-line Control strategy implementation method, it is characterized in that, described method comprises the steps:
One, security control device is carried out power system operating mode according to information such as the line power collected, pressing plate state, on off states and is automatically identified;
Two, security control device accepts dispatching terminal by setting cycle interval and calculates and the On-line Control strategy definite value issued;
Three, security control device is tested to the On-line Control strategy definite value received according to the automatic recognition result of current electric grid operational mode, namely judge under current electric grid operational mode, whether the electrical network parameter of security control device collection meets tactful effective term attached in On-line Control strategy definite value, when meeting described tactful effective term, security control device works in On-line Control strategy definite value mode, otherwise works in Off-line control strategy definite value mode;
Four, when security control device works in On-line Control strategy definite value mode, if power system operating mode changes, dispatching terminal has new strategy of on-line definite value to issue simultaneously, then return step 2; If power system operating mode changes, and security control device not yet receives new On-line Control strategy definite value, then device identifies new operational mode automatically, and return step 3, namely security control device is mated the On-line Control strategy definite value relevant portion used in security control device according to new power system operating mode recognition result, and tests whether meet described tactful effective term;
Five, when security control device works in On-line Control strategy definite value mode, if when the electrical network parameter of security control device collection meets the operation condition in the On-line Control strategy definite value that current electric grid operational mode mates, security control device is by the On-line Control strategy definite value action of mating with current electric grid operational mode, otherwise, return step one; Now, if dispatching terminal or be about to issue new On-line Control strategy definite value, then security control device is by suspending the reception process of On-line Control strategy definite value, until again accept the strategy of on-line definite value of dispatching terminal after security control device involution;
Six, when security control device is tested to the On-line Control strategy definite value received according to the automatic recognition result of current electric grid operational mode, do not meet tactful effective term, security control device runs on Off-line control strategy definite value mode, if when the electrical network parameter of security control device collection meets the operation condition in the Off-line control strategy definite value that current electric grid operational mode mates, security control device is by the Off-line control strategy definite value action of mating with current electric grid operational mode, otherwise, return step one.
In step 5, security control device suspends the way of strategy of on-line definite value reception process, preferred employing initiatively send device to start or involution quantity of state by security control device on dispatching terminal, notice dispatching terminal security control device current state, ensure that security control device internal microprocessor less can be subject to external disturbance when device action, thus improve the reliability of device action.
Useful achievement of the present invention is by the automatic identification of security control device to operational mode, and mate with strategy of on-line definite value, improve the adaptability of strategy of on-line definite value to operational mode, thus better can play online Safety system and promoting the effect in power grid security, reliable, economical operation.
Accompanying drawing explanation
Fig. 1 is operational mode adaptive security control device control procedure schematic diagram;
Fig. 2 is double loop maintenance mode recognition logic figure;
Fig. 3 is the online Safety system schematic diagram that dispatching terminal and security control device form;
When Fig. 4 is security control device startup, dispatching terminal is issued to the processing mode of strategy of on-line definite value process.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
By the automatic identification of security control device to operational mode, what calculate online with dispatching terminal mates containing the strategy of on-line definite value of multiple operational mode, when operational mode change, dispatching terminal is not yet able to do in time to calculate and issues new strategy of on-line timer can automatically according to the corresponding strategy of on-line definite value run in the operational mode coalignment after changing.
The present invention is introduced using the online security control device of North China Power Telecommunication Network Shang Dou power plant as embodiment.When Shang Dou power plant-Chengde becomes 500kV double-circuit line generation " N-1 " fault, there is stable problem in another 1 loop line road, according to the control measure needing to take to excise the corresponding unit of Shang Dou power plant.On all security control device and control centre be responsible for being connected by 2M mode at the dispatching terminal of line computation, on send measurement data, receive strategy of on-line definite value simultaneously.
Fig. 1 is operational mode adaptive security control device control procedure schematic diagram.Composition graphs 1, the inventive method each link specific design step is as follows:
Step one, security control device are carried out operational mode according to information such as the line power collected, pressing plate state, on off states and are automatically identified.
For certain 500kV double loop, I loop line maintenance mode comprises two kinds of possibilities: the 1) scheduled overhaul of circuit; 2) circuit is because fault transfers this line maintenance mode to after tripping automatically.The concrete logic of the self-adapting estimation of security control device to this line maintenance mode is as follows:
1) scheduled overhaul of circuit
Distinguishing line tripping for the ease of device is because the manual operation of scheduled overhaul, or because fault tripping, is provided with line maintenance pressing plate especially.When scheduled overhaul, first will overhaul pressing plate accordingly and drop into, this timer is then identified as this line maintenance, transfers maintenance mode to, and no longer performs the control logic relevant to this line.
2) line failure tripping operation
In the non-input situation of line maintenance pressing plate, when device identifies line tripping, then perform relevant control logic, after waiting for device full resetting (usually getting 5s) afterwards, then switchover operation mode is this line maintenance mode.
Combinational logic corresponding to foregoing description as shown in Figure 2.
" string is mended and dropped into " pressing plate state that the adaptive judgement of mending circuit string in the present embodiment then gathers according to device determines that string is mended actual throwing and stopped state, when " string is mended and dropped into " pressing plate drops into, string is mended throwing and is stopped state for " 1 ", and work as " string mend drop into " pressing plate when exiting, string is mended throwing and is stopped state for " 0 ".
Step 2, security control device accept dispatching terminal by setting cycle interval and calculate and the strategy of on-line definite value issued.
Fig. 3 is the online Safety system schematic diagram that dispatching terminal and security control device form, and calculates corresponding control strategy, and be handed down to security control device by dispatching terminal according to operational mode and forecast failure.
Embodiment Zhong Shangdou power plant holds circuit string mend drop into, passage section normally runs, the operational mode that dispatching terminal is considered when line computation includes string and mends and exit this possible operation, and the strategy of on-line definite value of generation is as table 1.
The strategy of on-line definite value that table 1 security control device receives
| Definite value title | Local display (MW) | Distant place display (MW) |
| On hold string and mend and drop into power low value | 2400 | 2400 |
| 3 machine mode low values cut machine number | 0 | 0 |
| 4 machine mode low values cut machine number | 1 | 1 |
| 5 machine mode low values cut machine number | 2 | 2 |
| 6 machine mode low values cut machine number | 3 | 3 |
| 7 machine mode low values cut machine number | 0 | 0 |
| 8 machine mode low values cut machine number | 0 | 0 |
| On hold string and mend and drop into power intermediate value | 2800 | 2800 |
| 3 machine mode intermediate values cut machine number | 1 | 1 |
| 4 machine mode intermediate values cut machine number | 2 | 2 |
| 5 machine mode intermediate values cut machine number | 3 | 3 |
| 6 machine mode intermediate values cut machine number | 4 | 4 |
| 7 machine mode intermediate values cut machine number | 0 | 0 |
| 8 machine mode intermediate values cut machine number | 0 | 0 |
| On hold string and mend and drop into power high level | 3200 | 3200 |
| 3 machine mode high level cut machine number | 2 | 2 |
| 4 machine mode high level cut machine number | 3 | 3 |
| 5 machine mode high level cut machine number | 4 | 4 |
| 6 machine mode high level cut machine number | 5 | 5 |
| 7 machine mode high level cut machine number | 0 | 0 |
| Definite value title | Local display (MW) | Distant place display (MW) |
| 8 machine mode high level cut machine number | 0 | 0 |
| On hold string mend drop into power limit | 3600 | 3600 |
| On hold string and reexamine and repair power low value | 2000 | 2000 |
| 3 machine mode low values cut machine number | 1 | 1 |
| 4 machine mode low values cut machine number | 2 | 2 |
| 5 machine mode low values cut machine number | 3 | 3 |
| 6 machine mode low values cut machine number | 4 | 4 |
| 7 machine mode low values cut machine number | 0 | 0 |
| 8 machine mode low values cut machine number | 0 | 0 |
| On hold string and reexamine and repair power intermediate value | 2400 | 2400 |
| 3 machine mode intermediate values cut machine number | 2 | 2 |
| 4 machine mode intermediate values cut machine number | 3 | 3 |
| 5 machine mode intermediate values cut machine number | 4 | 4 |
| 6 machine mode intermediate values cut machine number | 5 | 5 |
| 7 machine mode intermediate values cut machine number | 0 | 0 |
| 8 machine mode intermediate values cut machine number | 0 | 0 |
| On hold string and reexamine and repair power high level | 2800 | 2800 |
| 3 machine mode high level cut machine number | 3 | 3 |
| 4 machine mode high level cut machine number | 4 | 4 |
| 5 machine mode high level cut machine number | 5 | 5 |
| 6 machine mode high level cut machine number | 6 | 6 |
| 7 machine mode high level cut machine number | 0 | 0 |
| 8 machine mode high level cut machine number | 0 | 0 |
| On hold string and reexamine and repair power limit | 3200 | 3200 |
Step 3, security control device are tested to the On-line Control strategy received according to current electric grid operational mode recognition result, and whether meet tactful effective term according to On-line Control strategy, determine that security control device works in strategy of on-line definite value mode or off-line strategy definite value mode.
Judge under current electric grid operational mode, the electrical network parameter of security control device collection is according to whether meeting tactful effective term attached in On-line Control strategy definite value, when meeting described tactful effective term, determine security control device work in On-line Control strategy definite value mode or, otherwise work in Off-line control strategy definite value mode.
Tactful effective term attached in the strategy of on-line definite value that security control device receives, preferably adopts in strategy of on-line definite value and embodies the section power gear bound of trend mode part as effective term.
In the present embodiment, security control device is according to current operational mode recognition result for string benefit input, passage section are normally run, and the section power collected with timer is 3100MW, meets strategy of on-line effective term 2400MW ~ 3600MW.Assuming that device works in off-line strategy definite value mode before receiving above-mentioned tactful definite value, then through effective term inspection, meet tactful definite value validity, device switches to strategy of on-line definite value mode.
Step 4, when security control device works in On-line Control strategy definite value mode, if power system operating mode changes, simultaneously dispatching terminal has new strategy of on-line definite value to issue, then return step 2; If power system operating mode changes, and security control device not yet receives new On-line Control strategy definite value, then device identifies new operational mode automatically, and return step 3, namely security control device is mated the On-line Control strategy definite value relevant portion used in security control device according to new power system operating mode recognition result, and tests whether meet described tactful effective term.
In the present embodiment, because device has been in strategy of on-line definite value mode, if now carry out string benefit to exit operation, then device is according to operational mode recognition result for string mends withdrawing mode, then corresponding strategy of on-line effective term is section power scope 2000MW ~ 3200MW.Before operation, actual profile power is 3100MW, if become 3150MW after operation, still meet effective term, therefore device still keeps strategy of on-line definite value mode.
Step 5, when security control device works in On-line Control strategy definite value mode, if when the electrical network parameter of security control device collection meets the operation condition in the On-line Control strategy definite value that current electric grid operational mode mates, security control device is by the On-line Control strategy definite value action of mating with current electric grid operational mode, otherwise, return step one; Now, if dispatching terminal or be about to issue new On-line Control strategy definite value, then security control device is by suspending the reception process of On-line Control strategy definite value, until again accept the strategy of on-line definite value of dispatching terminal after security control device involution.
In the present embodiment, issue strategy of on-line definite value processing mode as Fig. 4 to dispatching terminal when security control device is in starting state.When security control device enters starting state, send security control device starting state amount (value is 1) to dispatching terminal; When security control device is by starting state involution, send security control device starting state amount (value is 0) to dispatching terminal.
When security control device starting state amount is 1, security control device does not process the strategy of on-line definite value association message that dispatching terminal issues, and what simultaneously dispatching terminal suspended strategy of on-line definite value issues process, until security control device starting state amount reverts to 0.
Step 6, when security control device according to the automatic recognition result of current electric grid operational mode to receive On-line Control strategy definite value test, do not meet tactful effective term, security control device runs on Off-line control strategy definite value mode, if when the electrical network parameter of security control device collection meets the operation condition in the Off-line control strategy definite value that current electric grid operational mode mates, security control device is by the Off-line control strategy definite value action of mating with current electric grid operational mode, otherwise, return step one.
In the present embodiment, according to current operational mode recognition result, in order to go here and there, benefit exits security control device, passage section is normally run, the section power collected due to load fluctuation reason device is 3250MW, and strategy of on-line effective term is 2000MW ~ 3200MW, do not meet tactful definite value validity when carrying out effective term inspection to strategy of on-line definite value, therefore device works in off-line strategy definite value mode.Now, once grid collapses, security control device is mended the Off-line control strategy definite value that withdrawing mode mates carry out action by by with current string.
Above embodiment is in order to illustrate that the inventive method is by the automatic identification of device to operational mode, mate with the strategy of on-line definite value containing multiple operational mode that dispatching terminal calculates online, when operational mode changes, dispatching terminal not yet has enough time to calculate and issues new strategy of on-line timer can automatically according to the corresponding strategy of on-line definite value run in the operational mode coalignment after change, improve the adaptability of strategy of on-line definite value to operational mode, thus better can play online Safety system at lifting power grid security, reliably, the effect of economical operation aspect.
Claims (2)
1. an operational mode adaptive security control device On-line Control strategy implementation method, is characterized in that, described method comprises the steps:
One, security control device is carried out power system operating mode automatically identify according to the line power collected, pressing plate state, switching-state information;
Two, security control device accepts dispatching terminal by setting cycle interval and calculates and the On-line Control strategy definite value issued;
Three, security control device is tested to the On-line Control strategy definite value received according to the automatic recognition result of current electric grid operational mode, namely judge under current electric grid operational mode, whether the electrical network parameter of security control device collection meets tactful effective term attached in On-line Control strategy definite value, when meeting described tactful effective term, security control device works in On-line Control strategy definite value mode, otherwise work in Off-line control strategy definite value mode, wherein adopt in On-line Control strategy definite value and embody the section power gear bound of trend mode part as tactful effective term,
Four, when security control device works in On-line Control strategy definite value mode, if power system operating mode changes, dispatching terminal has new strategy of on-line definite value to issue simultaneously, then return step 2; If power system operating mode changes, and security control device not yet receives new On-line Control strategy definite value, then device identifies new operational mode automatically, and return step 3, namely security control device is mated the On-line Control strategy definite value relevant portion used in security control device according to new power system operating mode recognition result, and tests whether meet described tactful effective term;
Five, when security control device works in On-line Control strategy definite value mode, if when the electrical network parameter of security control device collection meets the operation condition in the On-line Control strategy definite value that current electric grid operational mode mates, security control device is by the On-line Control strategy definite value action of mating with current electric grid operational mode, otherwise, return step one; If dispatching terminal or be about to issue new On-line Control strategy definite value, then security control device is by suspending the reception process of On-line Control strategy definite value, until again accept the strategy of on-line definite value of dispatching terminal after security control device involution;
Six, when security control device is tested to the On-line Control strategy definite value received according to the automatic recognition result of current electric grid operational mode, do not meet tactful effective term, security control device runs on Off-line control strategy definite value mode, if when the electrical network parameter of security control device collection meets the operation condition in the Off-line control strategy definite value that current electric grid operational mode mates, security control device is by the Off-line control strategy definite value action of mating with current electric grid operational mode, otherwise, return step one.
2. operational mode according to claim 1 adaptive security control device On-line Control strategy implementation method, it is characterized in that: in step 5, when security control device suspends On-line Control strategy definite value reception process, adopt and on dispatching terminal, initiatively send security control device to start or involution quantity of state by security control device, notice dispatching terminal security control device current state, ensure that security control device internal microprocessor less can be subject to external disturbance when security control device action, thus improve the reliability of security control device action.
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| CN104659762B (en) * | 2014-11-14 | 2018-01-16 | 中国南方电网有限责任公司 | A kind of optimal stable control method suitable for double loop successive failure |
| CN106033888B (en) * | 2015-03-19 | 2018-10-09 | 国家电网公司 | Alternating current circuit failure based on prompt drop DC sensitivities pacifies control amount online evaluation method |
| CN106786597B (en) * | 2016-12-26 | 2019-04-02 | 国网山东省电力公司泰安供电公司 | The generation method and device of electric network fault correcting strategy |
| CN106655173B (en) * | 2016-12-26 | 2019-04-02 | 国网山东省电力公司泰安供电公司 | Electric power system fault restorative procedure and device |
| CN108847660B (en) * | 2018-06-06 | 2021-04-02 | 国电南瑞科技股份有限公司 | Prevention control optimization decision method based on online checking of offline strategy of security control system |
| CN109742751B (en) * | 2018-11-16 | 2022-08-05 | 国电南瑞科技股份有限公司 | Method, device and system for identifying and serving control strategy of security control device of power system |
| CN110350513B (en) * | 2019-05-31 | 2023-05-16 | 国网辽宁省电力有限公司 | Online strategy fixed value checking method for safety and stability control system |
| CN110350469B (en) * | 2019-05-31 | 2021-07-13 | 国网辽宁省电力有限公司 | Online strategy fixed value synchronous updating method and system |
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