CN101299587A - Electric power telemechanical device RTU and method for implementing automatic voltage control of generating plant - Google Patents

Electric power telemechanical device RTU and method for implementing automatic voltage control of generating plant Download PDF

Info

Publication number
CN101299587A
CN101299587A CNA2008100397010A CN200810039701A CN101299587A CN 101299587 A CN101299587 A CN 101299587A CN A2008100397010 A CNA2008100397010 A CN A2008100397010A CN 200810039701 A CN200810039701 A CN 200810039701A CN 101299587 A CN101299587 A CN 101299587A
Authority
CN
China
Prior art keywords
generating set
module
unit
new
voltage control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CNA2008100397010A
Other languages
Chinese (zh)
Other versions
CN101299587B (en
Inventor
林木
褚文捷
杨凌云
王宇
吴成东
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANGHAI WESCON SYSTEM CONTROL Inc
Original Assignee
SHANGHAI WESCON SYSTEM CONTROL Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHANGHAI WESCON SYSTEM CONTROL Inc filed Critical SHANGHAI WESCON SYSTEM CONTROL Inc
Priority to CN2008100397010A priority Critical patent/CN101299587B/en
Publication of CN101299587A publication Critical patent/CN101299587A/en
Application granted granted Critical
Publication of CN101299587B publication Critical patent/CN101299587B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation

Landscapes

  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention discloses an electric power telemechanical apparatus RTU and a method for realizing the automatic voltage control of the power plant. The inventive electric power telemechanical apparatus includes a central control module, a remote signalling module, a telemetering module, a remote regulating module and a remote control module, wherein the central control module includes a communication submodule, a data bank submodule and an automatic voltage control submodule, which generates the control signal for adjusting the wattless production output of the generating set, based on the data stored in the data bank submodule, and transmits the control signals to the remote regulating module or the remote control module through the communication submodule, then transmits to the generating set which participates in the voltage control through the remote regulating module or the remote control module, realizes the automatic voltage control. The invention gives full play to the function of the electric power telemechanical apparatus, reduces the amount of the situ hardware units, increases the operational precision of the data in the AVC adjusting process.

Description

The method of electric power telemechanical device RTU and realization power plant automatism voltage control thereof
Technical field
The present invention relates to a kind of electric power telemechanical device of power plant and utilize this electric power telemechanical device to realize the method for power plant automatism voltage control.
Background technology
Electric power system in recent years is for improving the quality of power supply, improving voltage levvl and dropped into a large amount of energy, but expansion day by day along with scale of power, the pattern of carrying out reactive power according to its operating experience and simple logic determines, manually by the operation operator on duty had been difficult to reach the effect of optimal control in the past, and can not satisfy the requirement of electrical network.Therefore need take all factors into consideration various pressure regulation means carries out real-time regulated to the whole network voltage, adopts automatism voltage control (AVC) system will solve large-scale power grid reactive power problem from the level of system.
Consider that the excitation system of generating set possessed originally in the power plant, and the pattern of the excitation control system in each power plant is various and can not change, the AVC scheme in power plant can only be carried out not changing under the pattern that existing excitation system regulates.Based on different instruction assign, receive mode and data acquisition modes, AVC will have different implementations.Two kinds of implementations are arranged at present basically: realize that AVC regulates and realize that by independent AVC device the station AVC of factory regulates, and wherein adopts independent AVC device more general by DCS (Distribution ControlSystem).
(1). realize by DCS
By the scheme of transforming DCS realization automatism voltage control be: according to the automatism voltage control realization flow, the control centre arrives the automatism voltage control target instruction target word of generating set in the electric power telemechanical device (RTU) in power plant down by telecontrol channel, electric power telemechanical device becomes the signal of telecommunication of 4～20mA according to instruction transformation with it, deliver to DCS in AGC (the Automatic Generation Control) mode of issuing, regulate the idle of unit by DCS closed-loop control excitation regulation device and exert oneself.
The required real time data DCS of automatism voltage control itself all gathers, and the collection closed-loop control of data is independently finished by DCS, and dependence to external world is little.Because the real time data that AVC and DCS collect and scheduling AVC main website carry out not homology of data that reactive power calculates, be that the busbar voltage that DCS gathers is the high voltage bus voltage that this unit connected, be not the busbar voltage of scheduling AVC main website to the power plant examination, two data may be taken from busbar voltage rather than same bus, and these two bus measuring voltages are difference to some extent often.Like this, data just might occur inconsistent, have the situation of certain error, cause power plant inner high voltage busbar voltage control undesirable, and influence scheduling AVC main website is to the voltage examination in power plant.In addition, finish the AVC automatic control and adjustment with DCS, when telecontrol channel occurs when unusual, the current signal of RTU output remains unchanged, and it is constant that generating set idle exerted oneself, and might cause system voltage out-of-limit this moment.
Because the automaticity difference in each power plant, the producer of DCS and excitation regulation device (AVR) and pattern difference need the AVC control function module according to different situations modification DCS on control strategy.Because the no system impedance of DCS itself is from debating knowledge, excitation regulation from the correction ability, do not have full factory and coordinate control model, the AVC system is very big to the DCS dependence like this, and degree of regulation and speed are influenced obviously by DCS system process and resource, and can't test its algorithm accuracy by dynamic simulation test.Therefore has certain limitation by the scheme of transforming DCS realization AVC adjusting.
(2). realize that by special-purpose AVC device the AVC system regulates
Special-purpose AVC device is divided into: AVC device host computer and AVC device slave computer.
The function of special-purpose AVC device host computer is the analog quantity information that receives generating set that slave computer collects and bus etc., the switching value information of reflection running status, also receives control command and the busbar voltage desired value that power plant's telemechanical apparatus (or network monitoring system NCS) sends simultaneously; Carry out computing according to the information that collects, dope need on the bus to send always idle, then the generating set on the bus is carried out idle reasonable distribution, the control command of allocation result (target of each unit is idle) and output is sent to slave computer, realizes the idle allocation optimum between each unit.
The function of special-purpose AVC device slave computer is that the data upload that analog quantity and switching value etc. is gathered is carried out analyzing and processing to host computer, receive the control command and the idle value of target of host computer simultaneously, according to the control command executable operations, and the responsible idle desired value that is adjusted to each unit.Slave computer guarantees unit simultaneously when regulating the unit excitation by native system, and unit operation is in safe and rational scope.
Special-purpose AVC device also can directly and be dispatched the AVC master station communication generally by electric power telemechanical device receiving scheduling AVC target instruction target word.Advantage by the electric power telemechanical device receiving scheduling AVC AVC of main website target instruction target word is directly to utilize existing, the ripe scheduling passage and the AVC of the main website target instruction target word of communication protocol receiving scheduling and the load curve of electric power telemechanical device maturation; Weak point is to receive data through electric power telemechanical device, need carry out stipulations with the electric power telemechanical device of different manufacturers and communicate by letter.If the special-purpose AVC device of power plant directly with scheduling AVC master station communication, then the AVC of power plant and electric power telemechanical device are relatively independent, but need to increase and the communicating by letter of main website, investment that will the increase passage.
Summary of the invention
Technical problem to be solved by this invention is, a kind of electric power telemechanical device is provided, and this electric power telemechanical device has the automatic voltage regulatory function.
Another purpose of the present invention is to provide a kind of method of utilizing electric power telemechanical device to realize the power plant automatism voltage control.
The technical solution adopted in the present invention is: a kind of electric power telemechanical device, comprise central control module, remote signal module, telemetry module, remote regulating module and remote control module, central control module links to each other by bus with remote control module with remote signal module, telemetry module, remote regulating module, its characteristics are that this central control module comprises communicator module, database submodule and automatism voltage control submodule; Wherein,
The communicator module is used between scheduling AVC main website and database submodule, automatism voltage control submodule, remote signal module, telemetry module, remote regulating module and remote control module, realizes data communication between remote signal module and telemetry module and database submodule and between automatism voltage control submodule and remote regulating module and remote control module;
The database submodule is used to deposit and carries out the required data of automatism voltage control, carries out data interaction with communicator module and automatism voltage control submodule respectively;
The automatism voltage control submodule, based on the data that leave in the database submodule, generate the idle control signal of exerting oneself of regulator generator group, and described control signal is sent to described remote regulating module or remote control module by the communicator module, send to each generating set that participates in automatism voltage control by remote regulating module or remote control module again, realize automatism voltage control.
In above-mentioned electric power telemechanical device, the automatism voltage control submodule comprises computing unit, protection constraints judging unit, reactive capability constraints judging unit, control signal generating unit and main electrical scheme structure recognition unit, wherein:
Computing unit by the system impedance between self study method identification power plant and the electrical network, and passes through formula Q new = U new ( U new - U old ) X + Q old U old × U new Calculate the total idle desired value Q of full factory NewReach the unit reactive power distribution principle of formulating according to the user, the unit reactive power value Q that each generating set of participation automatism voltage control be should bear in the calculating power plant i, and result of calculation sent to reactive capability constraints judging unit, and wherein, U NewBe high voltage bus target voltage values, U OldBe current high voltage bus magnitude of voltage, Q OldBe the idle value that current power plant sends, X is the system impedance value between power plant and the electrical network;
Protection constraints judging unit judges whether each generating set all satisfies the protection constraints that the user sets for this generating set, and the generating set of the discontented foot protection constraints of notice computing unit does not participate in automatism voltage control;
Reactive capability constraints judging unit, the unit reactive power value Q of each generating set that the judgement computing unit calculates iWhether satisfy the reactive capability constraints that the user sets for this generating set respectively; If the unit reactive power value Q of any generating set is arranged iDo not satisfy reactive capability constraints, the status signal that then will not satisfy the generating set of reactive capability constraints reports described scheduling AVC main website by the communicator module, and the notice computing unit is with the total idle desired value Q of full factory NewDeduct behind the reactive capability that the generating set that do not satisfy reactive capability constraints can bear as the total idle desired value Q of new full factory New, make the generating set that does not satisfy reactive capability constraints not participate in recomputating again after the full factory reactive power Distribution Calculation simultaneously to participate in the unit reactive power value Q that voltage-controlled each generating set be should bear in the power plant i
Control signal generating unit has been born the total idle desired value Q of full factory at the generating set that participates in automatism voltage control NewOr the generating set that participates in automatism voltage control all born behind the idle limit value that can bear, the unit reactive power value that each generating set is born is converted to the control signal that the excitation regulation device of generating set can receive, and by the communicator module described control signal is sent to remote regulating module or remote control module;
Main electrical scheme structure recognition unit is used to discern between the high voltage bus in power plant and the high voltage bus in power plant and the mode of connection between the generating set, and recognition result is sent to computing unit.
The method of utilizing electric power telemechanical device to realize the power plant automatism voltage control of the present invention may further comprise the steps:
Step 1. is gathered in real time and is carried out the required data of automatism voltage control, and the described data that collect are sent to scheduling AVC main website, and receives the high voltage bus target voltage values of being assigned by scheduling AVC main website in real time;
Step 2. reaches the high voltage bus in power plant and the mode of connection between the generating set according to generating set on the power plant main electrical scheme that step 1 collected isolating switch, the circuit breaker position state related with high voltage bus between the high voltage bus in identification power plant;
Step 3. is passed through formula then by the system impedance between self study method identification power plant and the electrical network Q new = U new ( U new - U old ) X + Q old U old × U new Calculate the total idle desired value Q of full factory New, or directly receive the total idle desired value Q of full factory that assigns by described scheduling AVC main website by electric power telemechanical device NewWherein, U NewBe high voltage bus target voltage values, U OldBe current high voltage bus magnitude of voltage, Q OldBe the idle value that current power plant sends, X is the system impedance value between power plant and the electrical network;
Step 4. judges whether each generating set all satisfies the protection constraints that the user sets for this generating set, and the generating set of discontented foot protection constraints does not participate in automatism voltage control;
Step 5. calculates the unit reactive power value Q that participates in each generating set of automatism voltage control in the power plant according to the full factory reactive power distribution principle that the user formulates i
The unit reactive power value Q of each generating set that step 6. determining step 5 calculates iWhether satisfy the reactive capability constraints that the user sets for this generating set; If the unit reactive power value Q of any generating set is arranged iDo not satisfy reactive capability constraints, then electric power telemechanical device will not satisfy the status signal reporting scheduling AVC main website of the generating set of reactive capability constraints, and with the total idle desired value Q of full factory NewDeduct behind the reactive capability that the generating set that do not satisfy reactive capability constraints can bear as the total idle desired value Q of new full factory New, make the generating set that does not satisfy reactive capability constraints not participate in full factory reactive power Distribution Calculation simultaneously, repeated execution of steps 5 then; Born the total idle desired value Q of full factory until the generating set that participates in automatism voltage control NewOr the generating set that participates in automatism voltage control all born the idle limit value that can bear;
The unit reactive power value that step 7. is born each generating set convert to generating set excitation regulation device the control signal that can receive, and described control signal sent to the excitation regulation device of each generating set, come the idle of regulator generator group to exert oneself by excitation regulation device.
The invention has the beneficial effects as follows:
(a). homology collection in real time guarantees data consistency and operational precision.
The present invention directly utilizes real time data and its powerful inter-process ability of electric power telemechanical device, thereby guarantees data synchronization and consistency in the AVC adjustment process, and has improved the operation of data precision.
(b). target is regulated and feedback is finished in same device, and real-time closed-loop is regulated, and does not have communication delay and data transaction loss of significance.
The AVC target is regulated and feedback is all finished in electric power telemechanical device, realizes the real-time closed-loop adjusting; The data of direct electrification telemechanical apparatus in the adjustment process, data are not free to be postponed, and does not have loss of significance in the transfer process, and can accurately judge situations such as system disturbance, vibration.
(c). optimize existing resource.
Give full play to the function of original electric power telemechanical device, reduced the quantity of situ hardware, improved the utilance of existing equipment.Utilize existing power telemechanical apparatus equipment, reduced field adjustable, maintenance engineering amount, operating expenses, installing space, saved the scheduling passage, improved network data security; Reduce cooperation producer on the engineering, reduced debugging difficulty simultaneously, improved operating cost; Saved set-up time and user's up-front investment.
Description of drawings
Fig. 1 is the block diagram of electric power telemechanical device of the present invention;
Fig. 2 is the block diagram of central control module of the present invention:
Fig. 3 is the block diagram of communicator module of the present invention.
Embodiment
The present invention is described further below in conjunction with accompanying drawing.
As shown in Figure 1, electric power telemechanical device of the present invention comprises central control module 1, remote signal module 2, telemetry module 3, remote regulating module 4 and remote control module 5.Central control module 1 links to each other by bus 6 with remote signal module 2, telemetry module 3, remote regulating module 4 and remote control module 5.Wherein, central control module comprises communicator module 11, database submodule 12 and automatism voltage control submodule 13.Communicator module 11 is used between scheduling AVC main website 7 and database submodule 12, automatism voltage control submodule 13, remote signal module 2, telemetry module 3, remote regulating module 4 and remote control module 5, is realizing data communication between remote signal module 2 and telemetry module 3 and the database submodule 12 and between automatism voltage control submodule 13 and remote regulating module 4 and remote control module 5.Database submodule 12 is used to deposit and carries out the required data of automatism voltage control, carries out data interaction with communicator module 11 and automatism voltage control submodule 13 respectively.Database submodule stored data packet is drawn together power plant's running status amount that remote signal module 2 and telemetry module 3 gathered, data, the field engineer who issues from scheduling AVC main website is the protection constraints parameter and the reactive capability constrained parameters of generating set configuration according to the power plant actual conditions, concrete as: the state of on-the-spot circuit breaker, isolation switch, ground connection disconnecting link opening and closing position etc., protection, operation feedback signal, high voltage bus voltage, set end voltage, machine end electric current, high voltage bus target voltage etc.Automatism voltage control submodule 13 is based on the data that leave in the database submodule 12, generate the idle control signal of exerting oneself of regulator generator group, and this control signal is sent to remote regulating module 4 or remote control module 5 by communicator module 11, send to each generating set in the power plant that participates in automatism voltage control by remote regulating module 4 or remote control module 5 again, realize automatism voltage control.
Remote signal module 2 is used for the state of collection site circuit breaker, isolation switch, ground connection disconnecting link opening and closing position etc. and protection, operation feedback signal.Telemetry module 3 is used for voltage transformer/Current Transformer Secondary top-cross flow outputs such as the output of transmitter DC analogue quantities such as collection site is meritorious, idle, voltage, electric current, temperature, gear, pressure and on-the-spot circuit, bus, female connection, and electrical energy parameters such as the voltage by gathering, magnitude of current calculating active power, reactive power, power factor, frequency, harmonic component.The signal data that remote signal module 2 and telemetry module 3 are gathered all is saved in database, and sends to scheduling AVC main website 7 according to the requirement of scheduling AVC main website 7.Remote regulating module 4 is used for the output of automatism voltage control excitation signal.Remote control module 5 is used to control that on-the-spot killer switch, isolation switch, deciliter action of ground connection disconnecting link, the lifting action of transformer gear, electric capacity input withdraw from, the output of automatism voltage control excitation signal.
Automatism voltage control submodule 13 further comprises computing unit 131, protection constraints judging unit 132, control signal generating unit 133, reactive capability constraints judging unit 134 and main electrical scheme structure recognition unit 135, wherein:
Computing unit 131 is by the system impedance between self study method identification power plant and the electrical network, and passes through formula Q new = U new ( U new - U old ) X + Q old U old × U new Calculate the total idle desired value Q of full factory New, the unit reactive power distribution principle of formulating according to the user is calculated and is participated in the unit reactive power value Q that voltage-controlled each generating set be should bear in the power plant then i, and result of calculation sent to reactive capability constraints judging unit 134.Wherein, U NewBe high voltage bus target voltage values, U OldBe current high voltage bus magnitude of voltage, Q OldBe the idle value that current power plant sends, X is the system impedance value between power plant and the electrical network.
The basic thought of self-learning method is the equation that is listed between the variable relation of two sampled points continuous in time, and these two equations are carried out after the simple conversion, just can draw the relation of waiting to learn between variable and other variable.This method is understood by those skilled in the art, therefore only simply does an explanation, and no longer describes in detail.If before adjusting for the s time, the busbar voltage of k platform generating set is U K S-, send idle Q K S-, be respectively U after the adjustment K S+, Q K S+, the fundamental equation of the system impedance X self-learning algorithm between power plant and the electrical network is:
( Q k s + / U k s + - Q k s - / U k s - ) * X = ( U k s + - U k s - )
With respect to other algorithm, self-learning algorithm can find the parameter value of variation exactly, and then improves voltage-controlled precision, reduces network loss.
The user can formulate different unit reactive power distribution principles according to different demands, as etc. nargin distribute, the constant power factor distributes, etc. capacity allocation and mean allocation.Computing unit 131 calculates formula according to the unit reactive power under the different distribution principles and calculates the unit reactive power value Q that each generating set be should bear i
Protection constraints judging unit 132 judges whether each generating set all satisfies the protection constraints that the user sets for this generating set, and notifies the generating set of described computing unit 131 discontented foot protection constraintss not participate in automatism voltage control.Protection constraints comprises the out-of-limit protective condition of analog quantity, quantity of state latch-up protection condition, communication target value interruption protective condition and hardware fault protection condition.Reactive capability constraints judging unit 134 is judged the unit reactive power value Q of each generating set that computing unit 131 calculates iWhether satisfy the reactive capability constraints that the user sets for this generating set respectively.If the unit reactive power value Q of any generating set is arranged iDo not satisfy reactive capability constraints, the status signal that then will not satisfy the generating set of reactive capability constraints passes through communicator module 11 reporting scheduling AVC main websites 7, and notice computing unit 131 is with the total idle desired value Q of full factory NewDeduct behind the reactive capability that the generating set that do not satisfy reactive capability constraints can bear as the total idle desired value Q of new full factory New, make the generating set that does not satisfy reactive capability constraints not participate in recomputating again after the full factory reactive power Distribution Calculation simultaneously to participate in the unit reactive power value Q that voltage-controlled each generating set be should bear in the power plant i, born the total idle desired value Q of full factory until the generating set that participates in automatism voltage control NewOr the generating set that participates in automatism voltage control all born the idle limit value that can bear.Described reactive capability constraints and idle limit value all are meant the upper limit value and lower limit value that generating set is idle.
Control signal generating unit 133 has been born the total idle desired value Q of full factory at the generating set that participates in automatism voltage control NewOr the generating set that participates in automatism voltage control all born behind the idle limit value that can bear, the unit reactive power value that each generating set is born is converted to the control signal that the excitation regulation device of generating set can receive, and by communicator module 11 this control signal is sent to remote regulating module 4 or remote control module 5.Above-mentioned control signal is pulse signal, pulse width signal or analog signals.
Generating set isolating switch, the circuit breaker position state related on the power plant main electrical scheme that main electrical scheme structure recognition unit 135 collects according to stored remote signal modules in the database submodule 12 with high voltage bus, can discern between the high voltage bus in power plant and the high voltage bus in power plant and the mode of connection between the generating set, and recognition result is sent to described computing unit 131.
Communicator module 11 further comprises stipulations Transmit-Receive Unit 111, configuration dress program unit 112 and data exchange interface unit 113 down.Stipulations Transmit-Receive Unit 111 becomes the standard power rule schemata with data transaction, realizes that the data between electric power telemechanical device and scheduling AVC main website or other electric intelligent equipment are transmitted mutually.Configuration dress program unit 112 down is used for dress program under off-line or the Configuration Online; thereby be provided for the parameter of automatism voltage control for automatism voltage control submodule 13; as the upper limit value and lower limit value of high voltage bus voltage, the upper limit value and lower limit value of station-service voltage, upper limit value and lower limit value that generating set is idle etc., make the user can by this configuration down the dress program unit be that electric power telemechanical device is set protection constraints and reactive capability constraints.Data exchange interface unit 113 is used between stipulations Transmit-Receive Unit 111 and database submodule 12 and the automatism voltage control submodule 13, under the configuration between dress program unit 112 and the database submodule 12, between remote signal module 2 and telemetry module 3 and the database submodule 12 and realize data communication between automatism voltage control submodule 13 and remote regulating module 4 and the remote control module 5.Configuration of the present invention dress program unit 112 down can be directly coupled to automatism voltage control submodule 13 by data exchange interface unit 113, can not influence the operation of database submodule 12, thereby can realize dress program under the Configuration Online.
Utilize electric power telemechanical device of the present invention to realize that the method for power plant automatism voltage control mainly may further comprise the steps:
Step 1 is gathered in real time and is carried out the required data of automatism voltage control, and the data that collect are sent to scheduling AVC main website, and receives the high voltage bus target voltage values of being assigned by scheduling AVC main website in real time; Above-mentioned data comprise the isolating switch related with bus of generating set on the real-time amount, power plant main electrical scheme of active power, reactive power, main transformer high-pressure side reactive power, the high voltage bus voltage of every generating set, circuit breaker position state etc.
Step 2 according to generating set on the power plant main electrical scheme that step 1 collected isolating switch, the circuit breaker position state related with bus, reaches the high voltage bus in power plant and the mode of connection between the generating set between the high voltage bus in identification power plant.This step 2 is those skilled in the art's a common practise, therefore repeats no more.
Step 3 by the system impedance between self study method identification power plant and the electrical network, is passed through formula then Q new = U new ( U new - U old ) X + Q old U old × U new Calculate the total idle desired value Q of full factory New, or by the direct total idle desired value Q of full factory that assigns by scheduling AVC main station system that receives of electric power telemechanical device NewWherein, U NewBe high voltage bus target voltage values, U OldBe current high voltage bus magnitude of voltage, Q OldBe the idle value that current power plant sends, X is the system impedance value between power plant and the electrical network.
Described hereinbefore about the content that adopts the system impedance between self study method identification power plant and the electrical network, no longer repeated at this.
Step 4 judges whether each generating set all satisfies the protection constraints that the user sets for this generating set, and the generating set of discontented foot protection constraints does not participate in automatism voltage control.
Above-mentioned protection constraints for example, when abnormal signal occurring as excitation regulation device, electric power telemechanical device is answered locking control; Uprise the side bus node voltage and get over the locking value, electric power telemechanical device is answered locking control; Unit machine end electric current is got over the locking value, answers locking control or the like.
Step 5. calculates the unit reactive power value Q that participates in each generating set of automatism voltage control in the power plant according to the full factory reactive power distribution principle that the user formulates i
The user can formulate different full factory reactive power distribution principles according to different demands, as etc. nargin distribute, the constant power factor distributes, etc. capacity allocation and mean allocation.Above-mentioned full factory reactive power distribution principle is those skilled in the art's common practise, below only with etc. the nargin distribution principle be example.
Requirement etc. the nargin distribution principle is to carry out reactive power according to the reactive power allowance size of each control generator to distribute, and promptly remains the many units of reactive power, and many reactive powers are provided; The few unit of residue reactive power provides few reactive power.Can guarantee that so every generator unit always has the regulation and control capacity of identical amount (percentage) in its adjustable extent.Can express by following formula etc. nargin distribution calculation method:
Q i = Q i max - Q i Σ j = 1 n ( Q j max - Q i ) Q total
Wherein, n, Q i, Q Imax, Q Total, Q j, Q JmaxBe respectively the sum of the idle control unit of participation, the reactive power value of i generating set distribution, the idle maximum of exerting oneself of an i generating set, full factory set the reactive power value idle, that a j generating set distributes, the idle maximum of exerting oneself that reaches j generating set.J is the generating set numbering.
Step 6, the unit reactive power value Q of each generating set that determining step 5 calculates iWhether satisfy the reactive capability constraints that the user sets for this generating set; If the unit reactive power value Q of any generating set is arranged iDo not satisfy reactive capability constraints, then electric power telemechanical device will not satisfy the status signal reporting scheduling AVC main website of the generating set of reactive capability constraints, and with the total idle desired value Q of full factory NewDeduct behind the reactive capability that the generating set that do not satisfy described reactive capability constraints can bear as the total idle desired value Q of new full factory New, make the generating set that does not satisfy reactive capability constraints not participate in full factory reactive power Distribution Calculation simultaneously, repeated execution of steps 5 then; Born the total idle desired value Q of full factory until the generating set that participates in automatism voltage control NewOr the generating set that participates in automatism voltage control all born the idle limit value that can bear.The idle limit value here refers to the upper limit value and lower limit value that generating set is idle.
For example, the generating set that satisfies protection constraints in the power plant has 4, calculates the total idle desired value Q of full factory according to step 3 NewBe 200MW, calculate the unit reactive power value Q of each generating set according to step 5 iBe 50MW.If 50MW satisfies the reactive capability constraints (for example the idle higher limit of each generating set is 60MW) that the user sets for each generating set, just mean that also the generating set that participates in automatism voltage control born the total idle desired value Q of full factory under the situation of satisfied reactive capability constraints separately New, Q in other words NewGiven each generating set by reasonable distribution, electric power telemechanical device is with execution in step 7 so.If wherein there is a generating set not satisfy the reactive capability constraints (for example idle higher limit 10MW of this generating set) of user for its setting, so, to deduct 10MW (reactive capability that 10MW has born for this generating set) with 200MW and obtain 190MW, as the total idle desired value Q of new full factory New, and by its full factory of excess-three platform generating set continuation participation reactive power Distribution Calculation, calculate each generating set and should bear 63.3MW.Because the idle higher limit of its excess-three platform generating set is 60MW, so these three generating sets all born its idle limit value (after being 60MW) that can bear, execution in step 7 again.If the reactive capability of other three generating sets is not 60MW but 70MW, its ability to bear has surpassed 190MW, so, just mean that four generating sets that participate in automatism voltage control have born the total idle desired value of full factory of 200MW, electric power telemechanical device is also with execution in step 7.
Step 7, with each generating set be unit reactive power value that automatism voltage control the is born excitation regulation device that converts generating set to the control signal that can receive, and described control signal sent to the excitation regulation device of each generating set, come the idle of regulator generator group to exert oneself by excitation regulation device.
From step 6 for example as can be known, the unit reactive power value Q that is calculating according to step 5 iSurpass this generating set can bear idle limit value the time, so, the idle limit value of this generating set promptly becomes the unit reactive power value that it is born for automatism voltage control.
Though description of the invention combines certain embodiments, it should be understood by one skilled in the art that the present invention is not limited to embodiment described here, and can carry out various modifications and variations and do not deviate from the spirit and scope of the present invention.

Claims (5)

1. electric power telemechanical device, comprise central control module, remote signal module, telemetry module, remote regulating module and remote control module, described central control module links to each other by bus with remote control module with described remote signal module, telemetry module, remote regulating module, it is characterized in that described central control module comprises communicator module, database submodule and automatism voltage control submodule; Wherein,
The communicator module is used between scheduling AVC main website and database submodule, automatism voltage control submodule, remote signal module, telemetry module, remote regulating module and remote control module, realizes data communication between remote signal module and telemetry module and database submodule and between automatism voltage control submodule and remote regulating module and remote control module;
The database submodule is used to deposit and carries out the required data of automatism voltage control, carries out data interaction with described communicator module and described automatism voltage control submodule respectively;
The automatism voltage control submodule, based on the data that leave in the described database submodule, generate the idle control signal of exerting oneself of regulator generator group, and described control signal is sent to described remote regulating module or remote control module by the communicator module, send to each generating set that participates in automatism voltage control by remote regulating module or remote control module again, realize automatism voltage control.
2. electric power telemechanical device as claimed in claim 1; it is characterized in that; described automatism voltage control submodule comprises computing unit, protection constraints judging unit, reactive capability constraints judging unit, control signal generating unit and main electrical scheme structure recognition unit, wherein:
Computing unit by the system impedance between self study method identification power plant and the electrical network, and passes through formula Q new = U new ( U new - U old ) X + Q old U old × U new Calculate the total idle desired value Q of full factory NewReach the unit reactive power distribution principle of formulating according to the user, the unit reactive power value Q that each generating set of participation automatism voltage control be should bear in the calculating power plant i, and result of calculation sent to reactive capability constraints judging unit, and wherein, U NewBe high voltage bus target voltage values, U OldBe current high voltage bus magnitude of voltage, Q OldBe the idle value that current power plant sends, X is the system impedance value between power plant and the electrical network;
Protection constraints judging unit judge whether each generating set all satisfies the protection constraints that the user sets for this generating set, and the generating set of notifying described computing unit not satisfy described protection constraints does not participate in automatism voltage control;
Reactive capability constraints judging unit is judged the unit reactive power value Q of each generating set that described computing unit calculates iWhether satisfy the reactive capability constraints that the user sets for this generating set respectively; If the unit reactive power value Q of any generating set is arranged iDo not satisfy described reactive capability constraints, the status signal that then will not satisfy the generating set of described reactive capability constraints reports described scheduling AVC main website by the communicator module, and notifies described computing unit with the total idle desired value Q of full factory NewDeduct behind the reactive capability that the generating set that do not satisfy reactive capability constraints can bear as the total idle desired value Q of new full factory New, make the generating set that does not satisfy reactive capability constraints not participate in recomputating again after the full factory reactive power Distribution Calculation simultaneously to participate in the unit reactive power value Q that voltage-controlled each generating set be should bear in the power plant i
Control signal generating unit has been born the total idle desired value Q of full factory at the generating set that participates in automatism voltage control NewOr the generating set that participates in automatism voltage control all born behind the idle limit value that can bear, the unit reactive power value that each generating set is born is converted to the control signal that the excitation regulation device of generating set can receive, and by the communicator module described control signal is sent to described remote regulating module or remote control module;
Main electrical scheme structure recognition unit is used to discern between the high voltage bus in power plant and the high voltage bus in power plant and the mode of connection between the generating set, and recognition result is sent to described computing unit.
3. electric power telemechanical device as claimed in claim 2 is characterized in that, described control signal is pulse signal, pulse width signal or analog signals.
4. electric power telemechanical device as claimed in claim 1 is characterized in that, described communicator module comprises:
The stipulations Transmit-Receive Unit becomes the standard power rule schemata with data transaction, realizes that the data between described electric power telemechanical device and scheduling AVC main website or other electric intelligent equipment are transmitted mutually;
Configuration is the dress program unit down, is used for dress program under off-line or the Configuration Online;
The data exchange interface unit, be used between stipulations Transmit-Receive Unit and database submodule and the automatism voltage control submodule, configuration down between dress program unit and the database submodule, between remote signal module and telemetry module and the database submodule and realize data communication between automatism voltage control submodule and remote regulating module and the remote control module.
5. a method of utilizing the described electric power telemechanical device of claim 1 to realize the power plant automatism voltage control is characterized in that, may further comprise the steps:
Step 1. is gathered in real time and is carried out the required data of automatism voltage control, and the described data that collect are sent to scheduling AVC main website, and receives the high voltage bus target voltage values of being assigned by scheduling AVC main website in real time;
Step 2. reaches the high voltage bus in power plant and the mode of connection between the generating set according to generating set on the power plant main electrical scheme that step 1 collected isolating switch, the circuit breaker position state related with high voltage bus between the high voltage bus in identification power plant;
Step 3. is passed through formula then by the system impedance between self study method identification power plant and the electrical network Q new = U new ( U new - U old ) X + Q old U old × U new Calculate the total idle desired value Q of full factory New, or directly receive the total idle desired value Q of full factory that assigns by described scheduling AVC main website by electric power telemechanical device NewWherein, U NewBe high voltage bus target voltage values, U OldBe current high voltage bus magnitude of voltage, Q OldBe the idle value that current power plant sends, X is the system impedance value between power plant and the electrical network;
Step 4. judges whether each generating set all satisfies the protection constraints that the user sets for this generating set, and the generating set that does not satisfy described protection constraints does not participate in automatism voltage control;
Step 5. calculates the unit reactive power value Q that participates in each generating set of automatism voltage control in the power plant according to the full factory reactive power distribution principle that the user formulates i
The unit reactive power value Q of each generating set that step 6. determining step 5 calculates iWhether satisfy the reactive capability constraints that the user sets for this generating set; If the unit reactive power value Q of any generating set is arranged iDo not satisfy described reactive capability constraints, then electric power telemechanical device will not satisfy the status signal reporting scheduling AVC main website of the generating set of described reactive capability constraints, and with the total idle desired value Q of full factory NewDeduct behind the reactive capability that the generating set that do not satisfy described reactive capability constraints can bear as the total idle desired value Q of new full factory New, make the generating set that does not satisfy reactive capability constraints not participate in full factory reactive power Distribution Calculation simultaneously, repeated execution of steps 5 then; Born the total idle desired value Q of full factory until the generating set that participates in automatism voltage control NewOr the generating set that participates in automatism voltage control all born the idle limit value that can bear;
The unit reactive power value that step 7. is born each generating set convert to generating set excitation regulation device the control signal that can receive, and described control signal sent to the excitation regulation device of each generating set, come the idle of regulator generator group to exert oneself by excitation regulation device.
CN2008100397010A 2008-06-27 2008-06-27 Electric power telemechanical device RTU and method for implementing automatic voltage control of generating plant Expired - Fee Related CN101299587B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2008100397010A CN101299587B (en) 2008-06-27 2008-06-27 Electric power telemechanical device RTU and method for implementing automatic voltage control of generating plant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2008100397010A CN101299587B (en) 2008-06-27 2008-06-27 Electric power telemechanical device RTU and method for implementing automatic voltage control of generating plant

Publications (2)

Publication Number Publication Date
CN101299587A true CN101299587A (en) 2008-11-05
CN101299587B CN101299587B (en) 2010-06-02

Family

ID=40079299

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2008100397010A Expired - Fee Related CN101299587B (en) 2008-06-27 2008-06-27 Electric power telemechanical device RTU and method for implementing automatic voltage control of generating plant

Country Status (1)

Country Link
CN (1) CN101299587B (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101825879A (en) * 2010-04-15 2010-09-08 上海惠安系统控制有限公司 Measure and control device and method for collecting and storing data
CN101546472B (en) * 2009-04-29 2010-12-01 安徽省电力公司芜湖供电公司 Implement method of integrated universal simulation test system for electric network scheduling and electric quantity collection
CN102136735A (en) * 2011-01-21 2011-07-27 河海大学 Device for monitoring leading phase operation stability of generator and working method thereof
CN102222914A (en) * 2011-06-15 2011-10-19 上海惠安系统控制有限公司 Electrical telemechanical host with plant-level automatic power generation function
CN101710738B (en) * 2009-12-09 2013-03-27 中国电力科学研究院 Automatic voltage control system of power plant substation
CN103326380A (en) * 2013-07-16 2013-09-25 国家电网公司 Interface system and method of power transmission and distribution reactive power optimization system
CN104049619A (en) * 2014-06-30 2014-09-17 北京煜能电仪自动化技术有限公司 Switching device remote monitoring terminal shared by remote control loop and remote communication loop
CN104079063A (en) * 2014-07-14 2014-10-01 江西长天轨道交通设备有限公司 High-voltage interconnection switchover system and method
CN106602571A (en) * 2016-12-21 2017-04-26 国家电网公司 Automatic voltage control method based on computer monitoring system
CN106774281A (en) * 2017-02-05 2017-05-31 上海云剑信息技术有限公司 A kind of power system malicious act recognition methods for being based on four distant logic relation pictures
CN107910905A (en) * 2017-11-06 2018-04-13 安徽立卓智能电网科技有限公司 A kind of method for improving thermal power plant's automatic voltage control system control accuracy
CN109193764A (en) * 2018-09-14 2019-01-11 青海电研科技有限责任公司 A kind of photovoltaic plant idle work optimization method based on self study identification

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO314557B1 (en) * 2000-02-01 2003-04-07 Abb Research Ltd Procedure for control and communication
CN1937347A (en) * 2006-10-20 2007-03-28 河海大学 Graded hierarchical reactive voltage optimized control method

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101546472B (en) * 2009-04-29 2010-12-01 安徽省电力公司芜湖供电公司 Implement method of integrated universal simulation test system for electric network scheduling and electric quantity collection
CN101710738B (en) * 2009-12-09 2013-03-27 中国电力科学研究院 Automatic voltage control system of power plant substation
CN101825879A (en) * 2010-04-15 2010-09-08 上海惠安系统控制有限公司 Measure and control device and method for collecting and storing data
CN102136735A (en) * 2011-01-21 2011-07-27 河海大学 Device for monitoring leading phase operation stability of generator and working method thereof
CN102136735B (en) * 2011-01-21 2013-04-10 河海大学 Device for monitoring leading phase operation stability of generator and working method thereof
CN102222914A (en) * 2011-06-15 2011-10-19 上海惠安系统控制有限公司 Electrical telemechanical host with plant-level automatic power generation function
CN103326380A (en) * 2013-07-16 2013-09-25 国家电网公司 Interface system and method of power transmission and distribution reactive power optimization system
CN104049619B (en) * 2014-06-30 2017-03-29 北京煜能电气有限公司 The switching device remote monitoring terminal that a kind of remote control, remote signalling loop share
CN104049619A (en) * 2014-06-30 2014-09-17 北京煜能电仪自动化技术有限公司 Switching device remote monitoring terminal shared by remote control loop and remote communication loop
CN104079063A (en) * 2014-07-14 2014-10-01 江西长天轨道交通设备有限公司 High-voltage interconnection switchover system and method
CN104079063B (en) * 2014-07-14 2016-05-04 北京太格时代自动化系统设备有限公司 One is pressed mutual switched system and is pressed mutual changing method
CN106602571A (en) * 2016-12-21 2017-04-26 国家电网公司 Automatic voltage control method based on computer monitoring system
CN106602571B (en) * 2016-12-21 2019-04-23 国家电网公司 Automatic voltage control method based on computer supervisory control system
CN106774281A (en) * 2017-02-05 2017-05-31 上海云剑信息技术有限公司 A kind of power system malicious act recognition methods for being based on four distant logic relation pictures
CN107910905A (en) * 2017-11-06 2018-04-13 安徽立卓智能电网科技有限公司 A kind of method for improving thermal power plant's automatic voltage control system control accuracy
CN107910905B (en) * 2017-11-06 2021-02-05 安徽立卓智能电网科技有限公司 Method for improving regulation and control precision of automatic voltage control system of thermal power plant
CN109193764A (en) * 2018-09-14 2019-01-11 青海电研科技有限责任公司 A kind of photovoltaic plant idle work optimization method based on self study identification

Also Published As

Publication number Publication date
CN101299587B (en) 2010-06-02

Similar Documents

Publication Publication Date Title
CN101299587B (en) Electric power telemechanical device RTU and method for implementing automatic voltage control of generating plant
KR20180088410A (en) Reactive power control method, device and system
CN102055241A (en) Integrated real-time power and solar farm control system
CN102195294A (en) Wind farm reactive comprehensive optimization control method
CN102761128A (en) On-line coordinated automatic control method for economical operation and reactive power optimization of transformer
CN104158199B (en) Power system real-time status is carried out the system and method for reactive power and voltage control
CN108599379B (en) Power monitoring system for micro-grid group
CN201260078Y (en) Electric remote host having voltage automatic control function
CN103246283A (en) Closed loop testing method of power plant side automatic voltage control system
CN104283222A (en) Regional power grid reactive voltage control system
CN105515010A (en) Cooperative game-based secondary voltage coordination control method and system
CN105226726A (en) A kind of photovoltaic plant centralized monitoring system
CN103618308B (en) The alternating current circuit trend autocontrol method of a kind of interchange transmission system in parallel with flexible direct current
CN107994608A (en) The reactive voltage control method of photovoltaic plant
CN101615882B (en) Real-time closed-loop automatic control method for power transformer
CN102222914A (en) Electrical telemechanical host with plant-level automatic power generation function
CN103001236A (en) Wind turbine generator reactive power regulation method and system based on air quenching cooler (AQC) of wind power plant
CN109217324B (en) Automatic voltage control system and control method considering reactive power price compensation
CN202917983U (en) Wind turbine generator reactive adjusting system based on wind power plant AQC
CN105449715A (en) Reactive voltage control method and device for wind power plants
CN103197641B (en) Power Plant stage load and voltage integration automatic control system
CN104240151A (en) Transient stability optimal correcting and control system and method for power system
CN103904674A (en) Load flow analysis method of direct current transmission feed end islanding system
CN103401247A (en) Optimization method for realizing automatic generation control (AGC) and automatic voltage control (AVC) in monitoring system of boosting station of power plant
CN202721498U (en) Micro grid coordination controller based on PCC platform

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20100602

Termination date: 20160627

CF01 Termination of patent right due to non-payment of annual fee