CN106100141B - Power station active power and reactive power automatic control system - Google Patents
Power station active power and reactive power automatic control system Download PDFInfo
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Abstract
The present invention provides a kind of power station active power and reactive power automatic control system, comprising: receives scheduling sort command and processing module: receiving and the remote control and remote regulating control instruction of processing dispatching down distributing, and is transmitted to Master Control Unit centralized control module；The feedback information and preposition equipment data acquisition and control module information collected for receiving Master Control Unit centralized control module simultaneously upload scheduling after summarizing, include telemetering, remote signalling and control instruction return value；Preposition equipment data acquisition and control module: the information of the preposition controlled plant in acquisition power station, and the information that AGC/AVC control needs is transmitted to Master Control Unit centralized control module；Remote control, the remote regulating control instruction that processing Master Control Unit centralized control module issues are received simultaneously；Master Control Unit centralized control module: summarizing all information and Machining Analysis, realizes AGC/AVC control logic；The feature that the present invention has control logic tight, stable, it is ensured that accuracy, the stationarity of control.
Description
Technical field
The present invention mainly applies to the power industries such as water power, thermoelectricity, solar energy, wind-powered electricity generation and industrial control field, specifically
A kind of automatic control system for power plant.
Background technique
Automation generation control (Automatic Generation Control) is one in Energy Management System EMS
Item critical function, the power output of its real-time control unit to meet the continually changing electricity needs of user, and make system be in economy
Operating status.
In power industry, AGC refers to Automatic Generation Control (Automatic Generation Control): automatic hair
Electric control (AGC, Automatic Generation Control), be generate electricity by way of merging two or more grid systems factory offer paid ancillary service it
One, in defined power output adjusting range, the instruction that tracking power scheduling mechanism of exchange issues is adjusted generating set according to certain
Rate adjusts generated output in real time, to meet the service of power system frequency and dominant eigenvalues control requirement.Automatic generation control
It makes (AGC) and secondary adjustment is carried out to meet control target call, basic function to grid parts unit output are as follows: LOAD FREQUENCY
It controls (LFC), economic dispatch control (EDC), spare capacity monitors (RM), AGC performance monitoring (AGC PM), interconnection deviation control
Make (TBC) etc.；To reach its basic target: guaranteeing generated output and balancing the load, guarantee system frequency is rated value, is made net
Region interconnection trend is equal with plan, Minimum Area operating cost.Existing more than 40 years of history is simultaneously provincial more than 20, China
Power grid is applied, currently, the generator in most power plants has put into Active Generation automatic control system (AGC), AGC system
Putting into operation under the premise of guaranteeing unit safety, reliability service for system, greatly increases the safe and reliable of operation of power networks
Property.
Automatism voltage control AVC(Automatic Voltage Control) it is using computer and the communication technology, to electricity
Idle resource and voltage adjusting device in net carry out automatically controlling, and guarantee power grid security, high-quality and economical operation mesh to reach
's.The function of AVC device is: (AVC) device is controlled as the voltage of grading control in network voltage idle work optimization system and is realized
Means are acted rapidly for voltage change caused by load fluctuation and contingent to control to adjust generator excitation and realize electricity
The voltage of factory side controls, and guarantees to convey qualified voltage to power grid and meets the idle of system requirements.Receive simultaneously to examine oneself and adjust
The superior voltage control command and voltage setting valve for spending communication center, are calculated and are exported by voltage and reactive power optimization algorithm to control
The adjusting point of automatic excitation adjustor of generator realizes remote dispatching control.
AVC Controlling principle: it is idle to power plant to guarantee that voltage qualification reduces network loss for guarantee power network safety operation first
It is adjusted, the substation AVC uses following two major classes control thought, one is total idle by what is converted, be computed and directly determine out
The Target of Reactive Power of each unit quickly directly adjust, and another kind is used between total Target of Reactive Power unit by certain principle
Distribution；The difference for fully considering busbar voltage and busbar voltage target again simultaneously, the intelligence for carrying out variable step to unit adjust control
System is true by the automatic adjustment of the difference of busbar voltage target and current busbar voltage to the regulations speed that unit is increased and decreased magnetic
It is fixed.
Summary of the invention
The purpose of the present invention is to provide a kind of power station active power and reactive power automatic control systems, realize power station
AGC/AVC control logic.The technical solution adopted by the present invention is that:
A kind of power station active power and reactive power automatic control system, comprising: scheduling sort command and processing module are received, it is preceding
Install standby data acquisition and control module, Master Control Unit centralized control module, human-computer interface module.
It receives scheduling sort command and processing module: receiving and handle the remote control and remote regulating control instruction of dispatching down distributing, and turn
Issue Master Control Unit centralized control module；The feedback information and preposition equipment data of Master Control Unit centralized control module are received simultaneously
Acquisition control module information collected uploads scheduling after summarizing, include telemetering, remote signalling and control instruction return value；
Preposition equipment data acquisition and control module: the information of the preposition controlled plant in acquisition power station, and AGC/AVC is controlled
The information that system needs is transmitted to Master Control Unit centralized control module；Receive what processing Master Control Unit centralized control module issued simultaneously
Remote control, remote regulating control instruction；
Master Control Unit centralized control module: summarizing all information and Machining Analysis, realizes AGC/AVC control logic, control
Instruction issues and abnormality processing function；
Human-computer interface module: it shows that AGC/AVC controls information, and realizes the consistency operation function of AGC/AVC control.
The present invention has the advantages that the AGC/AVC that the present invention realizes power station is automatically controlled, have control logic tight,
Stable feature, it is ensured that accuracy, the stationarity of control.The precision that ensure that every control instruction, substantially increases
Control efficiency, so that the real-time of control meets electricity needs.
Detailed description of the invention
Fig. 1 is structure composition schematic diagram of the invention.
Specific embodiment
Below with reference to specific drawings and examples, the invention will be further described.
The present invention provides a kind of power station active power and reactive power automatic control system, as shown in Figure 1, comprising: receives
Dispatch sort command and processing module, preposition equipment data acquisition and control module, Master Control Unit centralized control module, man-machine interface mould
Block.There are data interaction but independent operating between each module, it is ensured that accuracy, stability and the high efficiency of control technology.Each mould
Block can be arranged in different servers and operate above, and be the concrete function division and data interaction situation of modules below；
It receives scheduling sort command and processing module: receiving scheduling sort command and processing module is connect with scheduling station, receive
With the remote control and remote regulating control instruction of processing dispatching down distributing, and it is transmitted to Master Control Unit centralized control module；Master control is received simultaneously
The feedback information and preposition equipment data acquisition and control module information collected of unit centralized control module are uploaded after summarizing and are adjusted
Degree includes telemetering, remote signalling and control instruction return value；
Preposition equipment data acquisition and control module: in preposition equipment data acquisition and control module and power station it is each it is preposition by
Equipment connection is controlled, preposition controlled plant herein refers to each controlled generator in power station, can be photovoltaic power generation equipment
Or thermoelectric generator, wind-driven generator etc.；Or reactive power compensator；Preposition equipment data acquisition and control module acquires in power station
Preposition controlled plant information, and AGC/AVC control need information be transmitted to Master Control Unit centralized control module；Simultaneously
Receive the control instructions such as remote control, the remote regulating that processing Master Control Unit centralized control module issues；
Master Control Unit centralized control module: summarizing all information and Machining Analysis, realizes AGC/AVC control logic, control
Instruction issues and the functions such as abnormality processing；
Human-computer interface module: friendly displaying AGC/AVC controls information, and realizes the consistency operation function of AGC/AVC control
Energy；
(1) AGC control method；In this control method, preposition controlled plant refers to each controlled power generation in power station
Machine；
AGC control method, the active-power P currently sampled using power station as foundation, the active-power P sampling period≤
100ms；
In following scheme, P represents the active power that power station is currently sampled, and is specifically sampled in outgoing line cabinet protective device；
MaxP represents dispatching down distributing, and to the active power instruction in power station, (unit is kW)；CP represent adjust dead zone (active power controller with
Track dead zone, unit kW)；ChangeP, which is represented, to be adjusted step-length (unit represents each in power station preposition controlled set as kW), MaxSxP
Standby nominal output (unit kW), MinSxP represents each preposition controlled plant minimum load, and (unit is kW)；
Herein, each preposition controlled plant nominal output MaxSxP is consistent in power station, each preposition controlled plant minimum load
MinSxP is also consistent；That is, the generating capacity of this five generators is one if there is five generators in a power station
It causes；
It is preposition controlled after AGC system all instructions issues in view of the reaction speed of preposition controlled plant power regulation
Equipment needs a period of time to can be only achieved instruction effect, so all control instructions can all wait after issuing in scheme below
R seconds (such as 10 seconds), but when MaxP variation when, AGC system can cancel before all instructions, and rerun issue it is new
Control instruction.Control instruction is handed down to the preposition controlled plant in power station by Master Control Unit centralized control module；
AGC puts into exit function: human-computer interface module, which can be put into, exits AGC function, AGC investment, before automatic control is all
Controlled plant is set, AGC is exited, all preposition controlled plant parameters of involution, and no longer automatically controls preposition controlled plant；
The control logic mechanism of the distant place AGC/on the spot: after power station AGC function investment, distant place control mode, power station AGC are such as in
The AGC regulating command that control function real-time tracing scheduling station issues is controlled；Such as in control mode on the spot, power station AGC control
Function processed is controlled according to instruction or Plan Curve on the spot；
AGC parameter setting situation:
All control instructions wait R seconds (preposition controlled plant receives instruction finishing time) after issuing, in AGC journey
It can configure in sequence configuration file.
Dead zone CP(unit kW is adjusted, active power controller tracks dead zone), it can configure in AGC program configuration file.
AGC adjusts step-length ChangeP (unit kW), can configure in AGC program configuration file.
AGC control is controlled by Master Control Unit centralized control module, and detailed process is as follows:
For the active-power P that power station is currently sampled, P points are several situations in step S102, S103, S104；
Step S101, AGC control starts；
Step S102 indicates that pushing electric network power meets scheduling controlling on power station as MaxP-CP≤P≤MaxP+CP at this time
Demand；Power station generated output reaches substantially to the range of scheduling requirement at this time, and Master Control Unit centralized control module controlled is set to preposition
It is standby not control, if terminating and removing at once if thering is the control instruction of preposition controlled plant to issue at this time；
Step S103 indicates that pushing electric network power is less than scheduling controlling lower limit on power station, power station needs as P < MaxP-CP
Increase generated output, dispatching of power netwoks lower limit MaxP-CP cannot be less than, determine the difference between MaxP and P, if it is less than
ChangeP, Master Control Unit centralized control module are done control as follows according to PSet=MaxP, otherwise are done according to PSet=P+ChangeP
Control as follows: PSet is an intermediate variable；
A1 judges that power station outgoing line cabinet protective device communication state issues if the breaker of power station outgoing line cabinet is in quartile
Instruction is closed in control, so that breaker coincidence；This step can ensure that power station energy output power, and otherwise all preposition controlled plants control all
It is nonsensical；
Whether B1 judges all preposition controlled plant communication conditions in power station and puts into operation, calculate preposition controlled plant
Communicate normal number N, the number that puts into operation RN；When N is equal to RN, execution step C1, when N is greater than RN, execution step D1；
C1 calculates each preposition active setting value SetP of controlled plant=(PSet-P)/RN+SetPold, SetPold RN
The active setting value average value of a preposition controlled plant last time；
Then compare SetP and MaxSxP at this time, when SetP be greater than MaxSxP, then by MaxSxP be assigned to SetP(because
Each maximum generating capacity of preposition controlled plant is exactly MaxSxP, and the setting beyond this value is with regard to nonsensical), otherwise SetP
=(PSet-P)/RN+SetPold；Master Control Unit centralized control module issues SetP to RN preposition controlled plants；Then R is waited
Second, return step S101；
D1 issues the instruction that puts into operation to the preposition controlled plant that communication is normal and does not put into operation, then executes step
C1；
Step S104 indicates that pushing electric network power is greater than the scheduling controlling upper limit on power station, power station needs as P > MaxP+CP
Generated output is reduced, no more than dispatching of power netwoks upper limit MaxP+CP, determines the difference between P and MaxP, if it is less than
ChangeP, Master Control Unit centralized control module are done control as follows according to PSet=MaxP, otherwise are done according to PSet=P-ChangeP
It is control as follows:
Whether A2 judges all preposition controlled plant communication conditions in power station and puts into operation, calculate preposition controlled plant
Normal number N, the number that puts into operation RN are communicated, if RN is greater than 0, executes step B2；
Optionally, if RN is equal to 0, outgoing line cabinet protective device communication state is judged, if the breaker of power station outgoing line cabinet is in
Coincidence issues control split instruction, so that breaker is in quartile；The mechanism may make when the wattful power for requiring dispatching down distributing to power station
When rate command M axP=0, power station can disengage power grid；
B2, calculates each preposition active setting value SetP=SetPold- (P-PSet)/RN of controlled plant, and SetPold is
The active setting value average value of RN preposition controlled plant last time,
Compare SetP and MinSxP at this time, when SetP be less than MinSxP, MinSxP is assigned to SetP, otherwise SetP=
SetPold- (P-PSet)/RN, Master Control Unit centralized control module issue SetP to RN preposition controlled plants；Then R is waited
Second, return step S101；
The active-power P that power station is currently sampled later should be gradually reduced, but it can also happen that when MinSxP is assigned
It is worth to the case where after SetP, the active-power P in power station is consistently greater than MaxP+CP, then needing at this time will be preposition controlled in power station
Equipment (generator) is shut down one by one, so that total active power of output P in power station declines；
C2, in previous step, if SetPold does not meet scheduling controlling demand also when being equal to MinSxP, (P sampled is big always
In MaxP+CP), Master Control Unit centralized control module issues instruction out of service to preposition controlled plant one by one so that it is preposition by
Control equipment is shut down one by one, if SetP is greater than MinSxP and continues to execute step B2.
It is meant that one by one in this step, instruction out of service first is issued to one in multiple preposition controlled plants, passed through
After crossing step A2 to C2, P is then judged, if P is also greater than MaxP+CP, then next preposition controlled plant is issued and exits fortune
Row instruction.
(2) AVC control method；In this control method, preposition controlled plant is the reactive power compensator in power station, idle
The operational modes such as compensation device support constant pressure and perseverance are idle；
AVC puts into exit function: human-computer interface module, which can be put into, exits AVC function, AVC investment, before automatic control is all
Controlled plant is set, AVC is exited, all preposition controlled plant parameters of involution, and no longer automatically controls preposition controlled plant.
AVC busbar voltage/idle control logic mechanism: after power station AVC function investment, such as it is in busbar voltage controlling party
Formula, the AVC bus regulating command that power station AVC function real-time tracing scheduling station issues are controlled；Such as in idle control mode,
The AVC Reactive-power control instruction that power station AVC function real-time tracing scheduling station issues is controlled.
AVC control is controlled by Master Control Unit centralized control module；
AVC parameter setting situation:
All control instructions wait R seconds (preposition controlled plant receives instruction finishing time) after issuing, in AVC journey
It can configure in sequence configuration file.
Voltage adjusts dead zone SV(unit kV), it can configure in AVC program configuration file.
Reactive-power control dead zone SQ(unit kVar), it can configure in AVC program configuration file.
Voltage adjusts step-length ChangeV (unit kV), can configure in AVC program configuration file.
Reactive-power control step-length ChangeQ (unit kVar) can configure in AVC program configuration file.
1, busbar voltage control mode；
Following scheme realize AVC control, with the busbar voltage V in power station be according to (the busbar voltage sampling period for≤
100ms), control ontology is AGC/AVC system.
In following scheme V represent power station busbar voltage (unit as kV), PV represent dispatching down distributing voltage-target (
Unit is kV), SV represents voltage and adjusts dead zone (unit is kV)；ChangeV represents voltage and adjusts step-length (unit is kV)；
In view of the reaction speed that preposition controlled device voltage is adjusted, distributed under Master Control Unit centralized control module every instruction
Bi Hou, preposition controlled plant need a period of time to can be only achieved instruction effect, so every control instruction issues in scheme below
After can all wait R seconds (such as 10 seconds), but when PV variation when, Master Control Unit centralized control module can cancel before institute
There is instruction, and reruns and issue new control instruction.
For " scheme ", V points are following steps S202, several situations of step S203:
Step S201, busbar voltage control start；
Step S202 indicates that power station busbar voltage meets scheduling controlling demand as abs (PV-V)≤SV；Master Control Unit
Centralized control module does not control preposition controlled plant；
Step S203 indicates that power station busbar voltage is unsatisfactory for scheduling controlling demand as abs (PV-V) > SV, determine PV and
The absolute value of difference between V, if being greater than ChangeV and PV is greater than V, Master Control Unit centralized control module is according to VSet=V+
ChangeV is done control as follows, if being greater than ChangeV and PV is less than V, Master Control Unit centralized control module is according to VSet=V-
ChangeV is done control as follows, if being less than or equal to ChangeV, Master Control Unit centralized control module does following control according to VSet=PV
System:
A3 determines preposition controlled plant communication state, and calculate the range of regulation that preposition controlled plant has at present: voltage can
Adjust lower limit MinV to the adjustable upper limit MaxV of voltage, as MinV < VSet < MaxV, Master Control Unit centralized control module issues voltage mesh
Scale value VSet is instructed to preposition controlled plant, while being unlocked voltage and being lowered block signal, voltage up-regulation block signal and report tune
Degree；As VSet≤MinV, step B3 is executed；As VSet >=MaxV, step C3 is executed；
B3, Master Control Unit centralized control module issue MinV and instruct to preposition controlled plant, generate voltage and lower locking letter
Number and reporting scheduling；
C3, Master Control Unit centralized control module issue MaxV and instruct to preposition controlled plant, generate voltage up-regulation locking letter
Number and reporting scheduling；
Step S204 is waited R seconds, return step S201.
2, the idle control mode in power station；
Following scheme realizes AVC control, with power station reactive power Q be according to (this is idle Q sampling period for≤
100ms), Q is sampled from outgoing line cabinet；Control ontology is AGC/AVC system.
Q represents power station reactive power (unit represents the reactive power target of dispatching down distributing as kVar), PQ in following scheme
Value (unit kVar), SQ represents Reactive-power control dead zone, and (unit is kVar)；ChangeQ represents Reactive-power control step-length (unit
For kVar)；
In view of the reaction speed of preposition controlled plant Reactive-power control, distributed under Master Control Unit centralized control module every instruction
Bi Hou, preposition controlled plant need a period of time to can be only achieved instruction effect, so every control instruction issues in scheme below
After can all wait R seconds (such as 10 seconds), but when PQ variation when, Master Control Unit centralized control module can cancel before institute
There is instruction, and reruns and issue new control instruction.
For " scheme ", Q points are following steps S302, several situations of step S303:
Step S301, power station is idle, and control starts；
When step S302, abs (PQ-Q)≤SQ, indicate that power station reactive power meets scheduling controlling demand, Master Control Unit collection
Middle control module does not control preposition controlled plant；
When step S303, abs (PQ-Q) > SQ, indicates that power station reactive power is unsatisfactory for scheduling controlling demand, determine PQ and Q
Between difference absolute value, if being greater than ChangeQ and PQ is greater than Q, Master Control Unit centralized control module is according to QSet=Q+
ChangeQ is done control as follows, if being greater than ChangeQ and PQ is less than Q, Master Control Unit centralized control module is according to QSet=Q-
ChangeQ is done control as follows, if being less than or equal to ChangeQ, Master Control Unit centralized control module does following control according to QSet=PQ
System:
A4 determines preposition controlled plant communication state, calculates the tune reactive power range that preposition controlled plant has at present:
Reactive power is adjustable lower limit MinQ is to the adjustable upper limit MaxQ of reactive power, when MinQ < QSet < MaxQ, Master Control Unit centralized control
Module issues reactive power target value QSet and instructs to preposition controlled plant, while unlocking reactive power and lowering block signal, nothing
Function power raises block signal and reporting scheduling；As QSet≤MinQ, step B4 is executed；As QSet >=MaxQ, step C4 is executed；
B4, Master Control Unit centralized control module issue MinQ and instruct to preposition controlled plant, generate reactive power downward and close
Lock signal and reporting scheduling；
C4, Master Control Unit centralized control module issue MaxQ and instruct to preposition controlled plant, generate reactive power up-regulation and close
Lock signal and reporting scheduling；
Step S304 is waited R seconds, return step S301.
Claims (6)
1. a kind of power station active power and reactive power automatic control system characterized by comprising
It receives scheduling sort command and processing module: receiving and handle the remote control and remote regulating control instruction of dispatching down distributing, and be transmitted to
Master Control Unit centralized control module；Feedback information and the acquisition of preposition equipment data of Master Control Unit centralized control module are received simultaneously
Control module information collected uploads scheduling after summarizing, include telemetering, remote signalling and control instruction return value；
Preposition equipment data acquisition and control module: the information of the preposition controlled plant in acquisition power station, and AGC/AVC is controlled need to
The information wanted is transmitted to Master Control Unit centralized control module；Simultaneously receive processing Master Control Unit centralized control module issue it is distant
Control, remote regulating control instruction；
Master Control Unit centralized control module: summarizing all information and Machining Analysis, realizes AGC/AVC control logic, control instruction
It issues and abnormality processing function；
Human-computer interface module: it shows that AGC/AVC controls information, and realizes the consistency operation function of AGC/AVC control；
The power station active power and reactive power automatic control system, so that the AGC that power station tracking scheduling station issues is adjusted
Instruction carries out the AGC control in power station either according to instruction or Plan Curve on the spot, specific as follows:
P represents the active power that power station is currently sampled；MaxP represents dispatching down distributing and instructs to the active power in power station；CP is represented
Adjust dead zone；ChangeP, which is represented, adjusts step-length, and MaxSxP represents each preposition controlled plant nominal output, MinSxP generation in power station
Each preposition controlled plant minimum load of table；
For the active-power P that power station is currently sampled,
Step S101, AGC control starts；
Step S102, as MaxP-CP≤P≤MaxP+CP, Master Control Unit centralized control module does not control preposition controlled plant
System；
Step S103 determines the difference between MaxP and P as P < MaxP-CP, if being less than ChangeP, Master Control Unit is concentrated
Control module is done control as follows according to PSet=MaxP, otherwise is done control as follows according to PSet=P+ChangeP: PSet is a intermediate
Variable；
A1 judges power station outgoing line cabinet protective device communication state, if the breaker of power station outgoing line cabinet is in quartile, issues control and closes
Instruction, so that breaker coincidence；
Whether B1 judges all preposition controlled plant communication conditions in power station and puts into operation, calculates preposition controlled plant communication
Normal number N, the number that puts into operation RN；When N is equal to RN, execution step C1, when N is greater than RN, execution step D1；
C1 calculates each preposition active setting value SetP of controlled plant=(PSet-P)/RN+SetPold, before SetPold is RN
Set the active setting value average value of controlled plant last time；
Then compare SetP and MaxSxP at this time, when SetP be greater than MaxSxP, then MaxSxP is assigned to SetP, otherwise SetP
=(PSet-P)/RN+SetPold；Master Control Unit centralized control module issues SetP to RN preposition controlled plants；Then R is waited
Second, return step S101；
D1 issues the instruction that puts into operation to the preposition controlled plant that communication is normal and does not put into operation, then executes step C1；
Step S104 determines the difference between P and MaxP as P > MaxP+CP, if being less than ChangeP, Master Control Unit is concentrated
Control module is done control as follows according to PSet=MaxP, otherwise is done control as follows according to PSet=P-ChangeP:
Whether A2 judges all preposition controlled plant communication conditions in power station and puts into operation, calculates preposition controlled plant communication
Normal number N, the number that puts into operation RN execute step B2 if RN is greater than 0；
B2 calculates each preposition active setting value SetP=SetPold- (P-PSet)/RN of controlled plant, before SetPold is RN
The active setting value average value of controlled plant last time is set,
Compare SetP and MinSxP at this time, when SetP be less than MinSxP, MinSxP is assigned to SetP, otherwise SetP=
SetPold- (P-PSet)/RN, Master Control Unit centralized control module issue SetP to RN preposition controlled plants；Then R is waited
Second, return step S101；
C2 does not meet scheduling controlling demand also when if SetPold being equal to MinSxP in previous step, that is, the P sampled is consistently greater than
MaxP+CP, Master Control Unit centralized control module issue instruction out of service to preposition controlled plant one by one, controlled set so that preposition
It is standby to shut down one by one, if SetP is greater than MinSxP and continues to execute step B2.
2. power station active power as described in claim 1 and reactive power automatic control system, which is characterized in that
In step A2, if RN is equal to 0, outgoing line cabinet protective device communication state is judged, close if the breaker of power station outgoing line cabinet is in
Position, issues control split instruction, so that breaker is in quartile.
3. power station active power as described in claim 1 and reactive power automatic control system, which is characterized in that
Human-computer interface module, which can be put into, exits AGC function, and AGC investment automatically controls all preposition controlled plants, and AGC is exited,
All preposition controlled plant parameters of involution, and no longer automatically control preposition controlled plant.
4. power station active power as described in claim 1 and reactive power automatic control system, which is characterized in that the power station
Active power and reactive power automatic control system, so that the AVC varying DC link voltage instruction that power station tracking scheduling station issues,
The busbar voltage control for carrying out power station, specifically includes:
V represents the busbar voltage in power station, and PV represents the voltage-target of dispatching down distributing, and SV represents voltage and adjusts dead zone,
ChangeV represents voltage and adjusts step-length；
For the busbar voltage V of current plant,
Step S201, busbar voltage control start；
Step S202 indicates that power station busbar voltage meets scheduling controlling demand as abs (PV-V)≤SV；Master Control Unit is concentrated
Control module does not control preposition controlled plant；
Step S203 indicates that power station busbar voltage is unsatisfactory for scheduling controlling demand as abs (PV-V) > SV, determine PV and V it
Between difference absolute value, if being greater than ChangeV and PV is greater than V, Master Control Unit centralized control module is according to VSet=V+
ChangeV is done control as follows, if being greater than ChangeV and PV is less than V, Master Control Unit centralized control module is according to VSet=V-
ChangeV is done control as follows, if being less than or equal to ChangeV, Master Control Unit centralized control module does following control according to VSet=PV
System:
A3 determines preposition controlled plant communication state, calculates the range of regulation that preposition controlled plant has at present: under voltage is adjustable
MinV is limited to the adjustable upper limit MaxV of voltage, as MinV < VSet < MaxV, Master Control Unit centralized control module issues voltage-target
VSet is instructed to preposition controlled plant, while being unlocked voltage and being lowered block signal, voltage up-regulation block signal and reporting scheduling；
As VSet≤MinV, step B3 is executed；As VSet >=MaxV, step C3 is executed；
B3, Master Control Unit centralized control module issue MinV and instruct to preposition controlled plant, generate voltage and lower block signal simultaneously
Reporting scheduling；
C3, Master Control Unit centralized control module issue MaxV and instruct to preposition controlled plant, generate voltage up-regulation block signal simultaneously
Reporting scheduling；
Step S204 is waited R seconds, return step S201.
5. power station active power as described in claim 1 and reactive power automatic control system, which is characterized in that the power station
Active power and reactive power automatic control system, so that the AVC Reactive-power control instruction that power station tracking scheduling station issues, carries out
Control that power station is idle, specifically includes:
Q represents power station reactive power, and PQ represents the reactive power target value of dispatching down distributing, and SQ represents Reactive-power control dead zone；
ChangeQ represents Reactive-power control step-length；
For current plant reactive power Q,
Step S301, power station is idle, and control starts；
When step S302, abs (PQ-Q)≤SQ, indicate that power station reactive power meets scheduling controlling demand, Master Control Unit concentrates control
Molding block does not control preposition controlled plant；
When step S303, abs (PQ-Q) > SQ, indicates that power station reactive power is unsatisfactory for scheduling controlling demand, determine between PQ and Q
Difference absolute value, if being greater than ChangeQ and PQ is greater than Q, Master Control Unit centralized control module is according to QSet=Q+
ChangeQ is done control as follows, if being greater than ChangeQ and PQ is less than Q, Master Control Unit centralized control module is according to QSet=Q-
ChangeQ is done control as follows, if being less than or equal to ChangeQ, Master Control Unit centralized control module does following control according to QSet=PQ
System:
A4 determines preposition controlled plant communication state, calculates the tune reactive power range that preposition controlled plant has at present: idle
Power adjustable lower limit MinQ is to the adjustable upper limit MaxQ of reactive power, when MinQ < QSet < MaxQ, Master Control Unit centralized control module
It issues reactive power target value QSet to instruct to preposition controlled plant, while unlocking reactive power and lowering block signal, idle function
Rate raises block signal and reporting scheduling；As QSet≤MinQ, step B4 is executed；As QSet >=MaxQ, step C4 is executed；
B4, Master Control Unit centralized control module issue MinQ and instruct to preposition controlled plant, generate reactive power and lower locking letter
Number and reporting scheduling；
C4, Master Control Unit centralized control module issue MaxQ and instruct to preposition controlled plant, generate reactive power up-regulation locking letter
Number and reporting scheduling；
Step S304 is waited R seconds, return step S301.
6. power station active power as described in claim 4 or 5 and reactive power automatic control system, which is characterized in that
Human-computer interface module, which can be put into, exits AVC function, and AVC investment automatically controls all preposition controlled plants, and AVC is exited,
All preposition controlled plant parameters of involution, and no longer automatically control preposition controlled plant；Human-computer interface module allows hand over bus
Voltage adjusts and Reactive-power control mode.
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Denomination of invention: Automatic control system for active and reactive power in power plants Granted publication date: 20190322 Pledgee: Bank of China Limited Wuxi Taihu Xincheng sub branch Pledgor: WUXI WONTEX-POWER Corp. Registration number: Y2024980007971 |