CN105529722B - A kind of power system reactive power control method, apparatus and system - Google Patents
A kind of power system reactive power control method, apparatus and system Download PDFInfo
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- CN105529722B CN105529722B CN201610066259.5A CN201610066259A CN105529722B CN 105529722 B CN105529722 B CN 105529722B CN 201610066259 A CN201610066259 A CN 201610066259A CN 105529722 B CN105529722 B CN 105529722B
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
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- 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
- Y02E40/30—Reactive power compensation
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/14—District level solutions, i.e. local energy networks
Abstract
A kind of power system reactive power control method of present invention offer, apparatus and system, the method includes：Obtain the busbar reactive requirement amount that automatic voltage control system is sent；Pulse control signal is generated according to the busbar reactive requirement amount；The pulse control signal is sent to the valve block of magnet controlled reactor.
Description
Technical field
The present invention relates to intelligent grid reactive-load compensation fields, and in particular to a kind of power system reactive power control method, device
And system.
Background technology
Automatism voltage control (Automatic Voltage Control, AVC) system is for ensureing power quality, carrying
High power transmission efficiency reduces network loss, the system for realizing stable operation and economical operation.AVC systems are located at power plant, certainly by scheduling
The real time datas such as each node of dynamicization system acquisition (substation at different levels) telemetering, remote signalling carry out on-line analysis and calculating, with each node
Voltage is qualified, critical point power factor is constraints, carries out on-Line Voltage Reactive power control, realizes that main transformer tap switch is adjusted
Number is minimum, capacitor switching most rationally, generator reactive contribute optimal, rate of qualified voltage highest and power transmission network loss rate it is minimum
Complex optimum target, ultimately forms control instruction, is executed automatically by dispatch automated system, realizes that voltage and reactive power optimization is automatic
Closed-loop control.
Magnet controlled reactor (Magnetically Controlled Reactors, MCR) full name is magnetic valve type controllable reactance
Device is a kind of adjustable shunt reactor of capacity, is mainly used for the reactive-load compensation of electric system.Currently, load-center substation is existing
MCR control systems can be installed additional on the basis of reactive compensation system mostly by having, the system as shown in Figure 1 include magnet controlled reactor 11,
Valve block 12 and magnet controlled reactor controller 13, magnet controlled reactor controller 13 therein can acquire the mother in substation location
The parameters such as line voltage, electric current, and the reactive power for needing to inject power grid under conditions present is calculated, then sent to valve block 12
Pulse control signal, by adjusting the degree of saturation of magnet controlled reactor iron core come the output size of control inductive reactive power, in fact
The smooth closed loop of existing electric network reactive-load is adjusted.
Thus, which there is the two kinds of automated closed-loops adjustings of intelligent AVC systems and MCR control systems in power grid is
System, and two systems do not have point of primary and secondary, be easy to cause the situation of Reactive-power control confusion, reduce the efficiency of idle control operation.
Invention content
Therefore, the present invention is to solve the adjusting operation of existing electric network reactive-load control system easily causes chaotic, efficiency
Low problem.
In view of this, the present invention provides a kind of power system reactive power control method, including：Obtain automatic voltage control system
The busbar reactive requirement amount of transmission；Pulse control signal is generated according to the busbar reactive requirement amount；To the valve of magnet controlled reactor
Group case sends the pulse control signal.
Preferably, after the pulse control signal to the transmission of the valve block of magnet controlled reactor, further include：It obtains
Local busbar data；Busbar reactive requirement amount is calculated according to the local busbar data；It is sent out to the automatic voltage control system
Send calculated busbar reactive requirement amount.
Correspondingly, the present invention also provides a kind of power system reactive power control devices, including：Acquiring unit, for being obtained from
The busbar reactive requirement amount that dynamic voltage control system is sent；Generation unit, for generating arteries and veins according to the busbar reactive requirement amount
Punching control signal；Transmission unit, for sending the pulse control signal to the valve block of magnet controlled reactor.
Preferably, further include：Local data acquiring unit, in the transmission unit to the valve of the magnet controlled reactor
After group case sends the pulse control signal, local busbar data are obtained；Computing unit, for according to the local busbar number
According to calculating busbar reactive requirement amount；Feedback unit, it is idle for sending calculated busbar to the automatic voltage control system
Demand.
The present invention also provides a kind of power system reactive power control systems, including：Automatic voltage control system, for acquiring electricity
Net busbar data, and calculate power grid busbar reactive requirement amount according to the busbar data；Magnet controlled reactor controller, with it is described from
Dynamic voltage control system connection, for receiving the power grid busbar reactive requirement amount, and according to the power grid busbar reactive requirement
Amount generates pulse control signal；Valve block and magnet controlled reactor, the valve block are connect with the magnet controlled reactor controller, institute
Valve block is stated for receiving the pulse control signal, and the magnet controlled reactor is moved according to the pulse control signal
Mutually triggering control is to change the magnet controlled reactor capacity, and the magnet controlled reactor is according to the volume output reactive power after change
To power grid.
Preferably, the magnet controlled reactor controller is additionally operable in the magnet controlled reactor according to the volume output after change
After reactive power to power grid, local busbar data are acquired, power grid busbar reactive requirement is calculated according to the local busbar data
Amount, and send calculated power grid busbar reactive requirement amount to the automatic voltage control system.
The present invention also provides another power system reactive power control systems, including：Automatic voltage control system, for acquiring
Power grid busbar data, and calculate the first busbar reactive requirement amount according to the busbar data；Magnet controlled reactor controller, and it is described
Automatic voltage control system connects, and for receiving the first busbar reactive requirement amount, is additionally operable to acquire local busbar data, root
The second busbar reactive requirement amount is calculated according to the local busbar data, is additionally operable to receive control instruction input by user, according to institute
State a generation pulse control signal in the first busbar reactive requirement amount, the second busbar reactive requirement amount and control instruction；Valve
Group case and magnet controlled reactor, the valve block are connect with the magnet controlled reactor controller, and the valve block is described for receiving
Pulse control signal, and it is described to change to magnet controlled reactor progress phase-shifting trigger control according to the pulse control signal
Magnet controlled reactor capacity, the magnet controlled reactor is according to the volume output reactive power after change to sub- power grid.
Preferably, the magnet controlled reactor controller is additionally operable in the magnet controlled reactor according to the volume output after change
After reactive power to power grid, local busbar data are acquired, power grid busbar reactive requirement is calculated according to the local busbar data
Amount, and send calculated power grid busbar reactive requirement amount to the automatic voltage control system.
Preferably, the magnet controlled reactor controller is instructed for receiving control model input by user, and according to described
Control model instruction is determined according to one in the first busbar reactive requirement amount, the second busbar reactive requirement amount and control instruction
A generation pulse control signal.
Technical solution of the present invention has the following advantages that：
Powerless control method and device provided by the invention make the power grid busbar that MCR controllers can be sent according to AVC systems
Reactive requirement amount is exported to the reactive power of power grid with pulse control signal adjustment MCR, to realize the smooth tune to reactive power
Section.Since the busbar reactive requirement amount is parameter calculated reactive requirement amount of the AVC systems according to the whole network itself acquired, phase
The calculated reactive requirement amount of electrical network parameter than only acquiring its own infield in MCR controllers, AVC system-computeds go out
More comprehensively, accurately, therefore it is more acurrate to the reactive power of power grid so that MCR is exported, and electric network reactive-load thus can be improved for reactive requirement amount
The control efficiency of power.
The first powerless control system provided by the invention utilizes AVC system-computed electric network reactive-load demands, is controlled by MCR
The electric network reactive-load demand that device is sent according to AVC systems is exported with pulse control signal adjustment MCR to the reactive power of power grid,
The final smooth adjustment realized to reactive power.Since the busbar reactive requirement amount is the whole network that AVC systems are acquired according to itself
The calculated reactive requirement amount of parameter, the electrical network parameter that its own infield is only acquired compared to MCR controllers calculates
Reactive requirement amount, the reactive requirement amount that AVC system-computeds go out more comprehensively, accurately, therefore makes MCR export to the idle work(of power grid
Rate is more acurrate, and the control efficiency of power system reactive power thus can be improved.
Second of powerless control system provided by the invention provides three kinds of idle control models simultaneously, for different situations
Different control models may be selected and carry out idle control, program flexibility is stronger, and can improve the effect of idle control operation
Rate.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in being described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, other drawings may also be obtained based on these drawings.
Fig. 1 is the structural schematic diagram of existing MCR control systems；
Fig. 2 is the flow chart of power system reactive power control method provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of power system reactive power control system provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of power system reactive power control device provided in an embodiment of the present invention.
Specific implementation mode
Technical scheme of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
The every other embodiment that personnel are obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
Can also be electrical connection to be mechanical connection；It can be directly connected, can also indirectly connected through an intermediary, it can be with
It is the connection inside two elements, can be wirelessly connected, can also be wired connection.For those of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
As long as in addition, technical characteristic involved in invention described below different embodiments non-structure each other
It can be combined with each other at conflict.
Embodiment 1
The embodiment of the present invention provides a kind of power system reactive power control method, the magnetic in the system of this method as shown in Figure 1
It controls reactor controller 13 to execute, this method as shown in Figure 2 includes：
S1 obtains the power grid busbar reactive requirement amount that AVC systems are sent, and wherein power grid busbar reactive requirement amount is AVC systems
The real-time busbar data such as system passes through the busbar voltage of acquisition the whole network, busbar is idle, are predicted by special algorithm in setting target
The bus reactive power rate of injection power grid is needed under voltage value.In actual use, MCR controllers can be connected with AVC systems,
By AVC systems reactive requirement amount is sent from trend MCR controllers.
S2 generates pulse control signal, the i.e. frequency of the control signal, electric current, electricity according to the busbar reactive requirement amount
The parameters such as pressure are to be calculated according to busbar reactive requirement amount, such as when reactive requirement amount is larger, the intensity of the signal increases therewith
Greatly.It will be understood by those skilled in the art that according to busbar reactive requirement amount generate pulse control signal specific algorithm there are many,
All it is feasible using existing algorithm；
S3 sends pulse control signal to the valve block of MCR, and valve block receives different pulse signals, is carried out to MCR
Phase-shifting trigger controls, i.e., by adjusting the degree of saturation of magnet controlled reactor iron core come the output size of control inductive reactive power,
Realize the smooth adjustment of electric network reactive-load.
This programme makes MCR controllers can be according to the power grid busbar reactive requirement amount that AVC systems are sent, with pulse control signal
Adjustment MCR is exported to the reactive power of power grid, to realize the smooth adjustment to reactive power.Since the busbar reactive requirement amount is
The calculated reactive requirement amount of parameter of the whole network that AVC systems are acquired according to itself, its own is only acquired compared to MCR controllers
The calculated reactive requirement amount of electrical network parameter of infield, the reactive requirement amount that AVC system-computeds go out more comprehensively, accurately, because
It is more acurrate to the reactive power of power grid that this makes MCR export, and the control efficiency of power system reactive power thus can be improved.
Further, after above-mentioned steps S3, this method can also include the following steps：
S4, obtains local busbar data, i.e. MCR acquires the electrical network parameter of its own infield, such as busbar voltage, mother
Line current etc.；
S5 calculates busbar reactive requirement amount according to the local busbar data, and calculated reactive requirement amount is MCR herein
In the case where not adopting the sent out data of AVC systems, itself is predicted by special algorithm in setting target according to local parameter
The bus reactive power rate that injection power grid is needed under voltage value, since the acquisition channel of parameter is different, this step is calculated idle
The reactive requirement amount of demand and AVC system-computeds is usually different；
S6 sends calculated busbar reactive requirement amount to AVC systems, this step is actually a kind of feedback operation, i.e.,
To reactive requirement amount of the AVC system feedbacks after idle adjustment, AVC systems can be using this data as calculating next time later
The foundation of reactive requirement amount, if idle there is still a need for inputting, return to step S1 carries out idle control operation next time.
Above-mentioned preferred embodiment acquires local power grid parameter by MCR controllers, and idle according to its collected parameter calculating
Demand, is finally fed back to AVC systems, and AVC systems is thus allow to adopt the concrete condition in MCR controllers location,
And then the calculating process of the reactive requirement amount of the whole network is optimized, further increase idle control efficiency.
Embodiment 2
The embodiment of the present invention provides a kind of power system reactive power control system, as shown in figure 3, the system includes：
AVC systems 31 calculate power grid busbar reactive requirement for acquiring power grid busbar data, and according to the busbar data
Amount, AVC systems can collect the parameter of each node (substation at different levels), and the idle need of calculating the whole network according to each node
The amount of asking；
MCR controllers 32 are connect with the AVC systems, for receiving the power grid busbar reactive requirement amount, and according to institute
It states power grid busbar reactive requirement amount and generates pulse control signal；
Valve block 33 and MCR34, the valve block are connect with the MCR controllers, and the valve block is described for receiving
Pulse control signal, and phase-shifting trigger control is carried out to the MCR according to the pulse control signal and is held with changing the MCR
Amount, the MCR is according to the volume output reactive power after change to power grid.
Said program utilizes AVC system-computed electric network reactive-load demands, the electricity sent according to AVC systems by MCR controllers
Net reactive requirement amount is exported with pulse control signal adjustment MCR to the reactive power of power grid, and final realize equals reactive power
It is sliding to adjust.Since the busbar reactive requirement amount is parameter calculated reactive requirement of the AVC systems according to the whole network itself acquired
Amount, the calculated reactive requirement amount of electrical network parameter of its own infield, AVC system meters are only acquired compared to MCR controllers
More comprehensively, accurately, therefore it is more acurrate to the reactive power of power grid so that MCR is exported, and electricity thus can be improved for the reactive requirement amount of calculating
The control efficiency of network reactive power.
Further, MCR controllers 32 can also MCR according to the volume output reactive power after change to power grid it
Afterwards, local busbar data are acquired, power grid busbar reactive requirement amount is calculated according to the local busbar data, and to the AVC systems
System 31 sends calculated power grid busbar reactive requirement amount.
Above-mentioned preferred embodiment calculates reactive requirement amount by acquiring local power grid parameter, and according to its collected parameter,
It is finally fed back to AVC systems, so that AVC systems is adopted the concrete condition in MCR controllers location, and then to complete
The calculating process of the reactive requirement amount of net optimizes, and further improves idle control efficiency.
Embodiment 3
The embodiment of the present invention provides another power system reactive power control system, exists with the difference of previous embodiment
In the MCR controllers in the present embodiment can also carry out local closed-loop control and manually control, and the system as shown in Figure 3 includes：
AVC systems 31 calculate the first busbar reactive requirement for acquiring power grid busbar data, and according to the busbar data
Amount, i.e., according to the calculated reactive requirement amount of network wide parameters；
MCR controllers 32 are connect with the AVC systems, for receiving the first busbar reactive requirement amount, are additionally operable to adopt
The local busbar data of collection calculate the second busbar reactive requirement amount according to the local busbar data and (are calculated according to local parameter
Reactive requirement amount), be additionally operable to receive control instruction input by user, according to the first busbar reactive requirement amount, second female
A generation pulse control signal in line reactive requirement amount and control instruction.MCR controllers can be according to predetermined control strategy
Or artificial mode selecting operation, utilize above-mentioned first busbar reactive requirement amount, the second busbar reactive requirement amount and control instruction
One of generate pulse control signal.
Valve block 33 and MCR34, the valve block are connect with the MCR controllers, and the valve block is described for receiving
Pulse control signal, and phase-shifting trigger control is carried out to the MCR according to the pulse control signal and is held with changing the MCR
Amount, the MCR is according to the volume output reactive power after change to sub- power grid.
Said program simultaneously provide three kinds of idle control models, for different situations may be selected different control models into
Control that row is idle, program flexibility is stronger, and can improve the efficiency of idle control operation.
Preferably, MCR controllers 32 be additionally operable to the MCR according to the volume output reactive power after change to power grid it
Afterwards, the second busbar reactive requirement amount is sent to the AVC systems 31.
Above-mentioned preferred embodiment acquires local power grid parameter by MCR controllers, and idle according to its collected parameter calculating
Demand, is finally fed back to AVC systems, and AVC systems is thus allow to adopt the concrete condition in MCR controllers location,
And then the calculating process of the reactive requirement amount of the whole network is optimized, further increase idle control efficiency.
As a preferred embodiment, above-mentioned MCR controllers 32 are instructed for receiving control model input by user,
And it is determined according to the first busbar reactive requirement amount, the second busbar reactive requirement amount and control according to control model instruction
A generation pulse control signal in instruction.Specifically, the acceptable 3 kinds of control models instruction of MCR controllers determines 3 kinds of controls
Pattern, respectively MCR carry out idle control according to the data that AVC systems provide, MCR carries out local closed-loop control, manual open-loop
Control.
Above-mentioned preferred embodiment can receive artificial selection operation, and different control models is enabled according to selection operation, full
The various requirement of sufficient intelligent grid operation further increases the efficiency of idle control operation.
Embodiment 4
The present embodiment provides a kind of power system reactive power control devices corresponding with embodiment 1, including：
Acquiring unit 41, the busbar reactive requirement amount for obtaining the transmission of AVC systems；
Generation unit 42, for generating pulse control signal according to the busbar reactive requirement amount；
Transmission unit 43, for sending the pulse control signal to the valve block of MCR.
This programme makes MCR controllers can be according to the power grid busbar reactive requirement amount that AVC systems are sent, with pulse control signal
Adjustment MCR is exported to the reactive power of power grid, to realize the smooth adjustment to reactive power.Since the busbar reactive requirement amount is
The calculated reactive requirement amount of parameter of the whole network that AVC systems are acquired according to itself, its own is only acquired compared to MCR controllers
The calculated reactive requirement amount of electrical network parameter of infield, the reactive requirement amount that AVC system-computeds go out more comprehensively, accurately, because
It is more acurrate to the reactive power of power grid that this makes MCR export, and the control efficiency of power system reactive power thus can be improved.
Preferably, above-mentioned apparatus further includes：
Local data acquiring unit 44, for sending the pulse control to the valve block of the MCR in the transmission unit
After signal processed, local busbar data are obtained；
Computing unit 45, for calculating busbar reactive requirement amount according to the local busbar data；
Feedback unit 46, for sending calculated busbar reactive requirement amount to the AVC systems.
Above-mentioned preferred embodiment calculates reactive requirement amount by acquiring local power grid parameter, and according to its collected parameter,
It is finally fed back to AVC systems, so that AVC systems is adopted the concrete condition in MCR controllers location, and then to complete
The calculating process of the reactive requirement amount of net optimizes, and further improves idle control efficiency.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (3)
1. a kind of power system reactive power control system, which is characterized in that including：
Automatic voltage control system, for acquiring power grid busbar data, and it is idle according to the busbar data the first busbar of calculating
Demand；
Magnet controlled reactor controller is connect with the automatic voltage control system, for receiving the first busbar reactive requirement
Amount, is additionally operable to acquire local busbar data, calculates the second busbar reactive requirement amount according to the local busbar data, is additionally operable to connect
Control instruction input by user is received, according to the first busbar reactive requirement amount, the second busbar reactive requirement amount and control instruction
In one generation pulse control signal；
Valve block and magnet controlled reactor, the valve block are connect with the magnet controlled reactor controller, and the valve block is for connecing
The pulse control signal is received, and phase-shifting trigger control is carried out to change to the magnet controlled reactor according to the pulse control signal
Become the magnet controlled reactor capacity, the magnet controlled reactor is according to the volume output reactive power after change to sub- power grid.
2. system according to claim 1, which is characterized in that the magnet controlled reactor controller is additionally operable in the magnetic control
After reactor is according to the volume output reactive power to power grid after change, local busbar data are acquired, according to described local female
Line number is according to calculating power grid busbar reactive requirement amount, and it is idle to the automatic voltage control system to send calculated power grid busbar
Demand.
3. system according to claim 1 or 2, which is characterized in that the magnet controlled reactor controller is for receiving user
The control model of input instructs, and is determined according to the first busbar reactive requirement amount, second according to control model instruction
A generation pulse control signal in busbar reactive requirement amount and control instruction.
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