CN106712039A - Distribution network voltage regulation-based regional network load interaction active power control method - Google Patents
Distribution network voltage regulation-based regional network load interaction active power control method Download PDFInfo
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- CN106712039A CN106712039A CN201710066562.XA CN201710066562A CN106712039A CN 106712039 A CN106712039 A CN 106712039A CN 201710066562 A CN201710066562 A CN 201710066562A CN 106712039 A CN106712039 A CN 106712039A
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- China
- Prior art keywords
- voltage
- active power
- regulation
- load
- power controller
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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
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
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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
- H02J3/02—Circuit arrangements for ac mains or ac distribution networks using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
-
- 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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
Abstract
The invention discloses a distribution network voltage regulation-based regional network load interaction active power control method. A frequency instability occurs in a power grid and active power control of a distribution network is needed, voltage of a distribution network side is regulated and an active load of the distribution network side is regulated through a comprehensive voltage regulation method within a qualified limit value range of the voltage to provide the power grid with a power support. The frequency instability is caused by a high power loss of the power grid, the active power of the load can be quickly reduced, the power grid is provided with an emergency power support and the power grid is assisted in fast frequency recovery.
Description
Technical field
The present invention relates to a kind of region net load interaction active power controller method based on distribution voltage-regulation, belong to electric power
System security controls field.
Background technology
Build global energy internet, it is intended to which promotion meets global power demand to clean with green mode.With power network
The continuous expansion of scale and electric load it is growing, by clean energy resource be dominate, the energy new frame centered on electricity by
Step is formed, and regional power grid is accelerated to stride forward extra-high voltage, at high proportion bulk power grid, clean energy resource epoch.To with extra-high voltage alternating current-direct current series-parallel connection
For the large receiving-end grid being characterized, the equivalent inertia and stable regulation ability of generator are greatly reduced in area, and alterating and direct current
Net easily sends out cascading failure again；Once generation direct current locking failure, frequency stabilization problem will occur therewith.For the problem, state's net
Company carried out system protection level frequency urgent control engineering mimoir, including HVDC Modulation power, pumped storage promptly cut pump, precisely
Cutting load etc., to lift bulk power grid safety comprehensive defence capability and provincial power network operation elasticity.Though existing means carry out load
Control, but the mode for interrupting interruptible load is used, need to cut off interruptible load when control is implemented, not yet dig completely
Excavate the potential of controllable burden.
The content of the invention
In order to solve the above-mentioned technical problem, have the invention provides a kind of region net load interaction based on distribution voltage-regulation
Work(Poewr control method.
In order to achieve the above object, the technical solution adopted in the present invention is：
A kind of region net load interaction active power controller method based on distribution voltage-regulation, when power network occurrence frequency loses
It is steady, it is necessary to during distribution active power controller, in the qualified limits of voltage, be adjusted with net side electricity by comprehensive pressure regulation method
Net side burden with power is matched somebody with somebody in pressure, regulation, for power network provides power support.
Voltage on line side is matched somebody with somebody by the reduction of comprehensive pressure regulation method, is reduced and is matched somebody with somebody net side burden with power.
The process of comprehensive pressure regulation method includes the switching of reactive-load compensation equipment and the tap joint position of ULTC
Regulation.
Comprehensive pressure regulation method is according to preferential switching reactive-load compensation equipment, then the principle for adjusting on-load transformer tap changer
Carry out.
The detailed process of the region net load interaction active power controller method is,
S1) during power network occurrence frequency unstability, start distribution active power controller, implement in the qualified limits of voltage to
Lower adjustment；
S2 each idle adjustable nargin of substation bus bar) is calculated；
S3) cut off each in the reactive-load compensation equipment thrown successively, while monitoring ensures that each substation bus bar voltage is not out-of-limit；
S4 the reactive-load compensation equipment that can not be cut) is judged whether, if it is not, then step S2 is gone to, if it is, going to step
Rapid S5；
S5 the tap for) calculating each transformer station's ULTC can lower gear number；
S6 ULTC gear) is adjusted downwards, while monitoring ensures that mesolow side voltage is not out-of-limit；
S7) judge whether without adjustable ULTC, if it is not, then step S6 is gone to, if it is, knot
Beam.
Reactive-load compensation equipment is capacitor bank.
By the way that capacitor bank number and the idle adjustable nargin of each substation bus bar of calculation of capacity can be cut.
The beneficial effect that the present invention is reached：The present invention power network it is high-power lose cause frequency unstability when, can be quick
Load active power is reduced, for power network provides urgent power support, the fast quick-recovery of auxiliary power grid frequency.
Brief description of the drawings
Fig. 1 is flow chart of the invention.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following examples are only used for clearly illustrating the present invention
Technical scheme, and can not be limited the scope of the invention with this.
A kind of region net load interaction active power controller method based on distribution voltage-regulation, when power network occurrence frequency loses
It is steady, it is necessary to during distribution active power controller, in the qualified limits of voltage, be adjusted with net side electricity by comprehensive pressure regulation method
Net side burden with power is matched somebody with somebody in pressure, regulation, for power network provides power support.
The requirement that static voltage characteristic mathematical principle and GB according to distribution network load/enterprise mark to distribution voltage can be obtained：
(1) Load static voltage characteristic ZIP model expressions：
Wherein, UN、UL、UL* load side bus rated voltage, the famous value of load side voltage and perunit value, P are followed successively byN、QNFor
The specified active, reactive power of load, PL、QLFor load is active, reactive power, ap、bp、cp、aq、bq、cqParameter is, correspondence is not
Same node value is different, meets
Formula 1 and formula 2 show that the active and idle of load is all made up of three parts, and Part I is directly proportional to voltage, represent
The load of constant impedance consumption；Part II is inversely proportional with voltage, represents the power corresponding with constant current load；Part III
It is invariable power component.
By formula 1 to voltage derivation, adjustment factor of the active power to voltage can be obtained：
dPL/dUL*=PN(2apUL*+bp) formula 3
By formula 3 as can be seen that voltage responsive characteristic is relevant with constituting for load, constant impedance part accounting is more, regulation
Effect is more obvious, by adjusting voltage, thus it is possible to vary burden with power.
(2) GB/requirement of enterprise's mark to distribution voltage：
National standard《Quality of power supply supply voltage deviation》Regulation, 20kV and following three phase supply voltage deviation are nominal electricity
± the 7% of pressure；Company standard《State Grid Corporation of China's quality of voltage and reactive management specify》Regulation, transformer station's 10kV buses are normal
Voltage tolerance under the method for operation is 0%~+the 7% of system nominal voltage.It can be seen that, during existing operation of power networks, deposit
In the space that voltage is adjusted downwards, the effect for reducing load power can be reached by turning down voltage.
According to above-mentioned analysis, a kind of region net load interaction active power controller method based on distribution voltage-regulation can be described
For：When power network occurrence frequency unstability, it is necessary to during distribution active power controller, in the qualified limits of voltage, by comprehensive tune
Voltage on line side is matched somebody with somebody in the reduction of pressure method, is reduced and is matched somebody with somebody net side burden with power, for power network provides power support.
The process of the comprehensive pressure regulation method includes the tap position of the switching of reactive-load compensation equipment and ULTC
Put regulation；And according to preferential switching reactive-load compensation equipment, then adjust the principle of on-load transformer tap changer and carry out.
As shown in figure 1, the detailed process of above-mentioned zone net load interaction active power controller method is：
S1) during power network occurrence frequency unstability, start distribution active power controller, implement in the qualified limits of voltage to
Lower adjustment；
S2 each idle adjustable nargin of substation bus bar (10kV)) is calculated；
S3) cut off each in the reactive-load compensation equipment thrown successively, while monitoring ensures that each substation bus bar voltage is not out-of-limit；
S4 the reactive-load compensation equipment that can not be cut) is judged whether, if it is not, then step S2 is gone to, if it is, going to step
Rapid S5；
S5 the tap for) calculating each transformer station's ULTC can lower gear number；
S6 ULTC gear) is adjusted downwards, while monitoring ensures that mesolow side voltage is not out-of-limit；
S7) judge whether without adjustable ULTC, if it is not, then step S6 is gone to, if it is, knot
Beam.
The above-mentioned general capacitor bank of reactive-load compensation equipment, by the way that capacitor bank number and each substation bus bar of calculation of capacity can be cut
Idle adjustable nargin.
The above method power network it is high-power lose cause frequency unstability when, can quickly reduce load active power, be electricity
Net provides urgent power support, the fast quick-recovery of auxiliary power grid frequency.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, on the premise of the technology of the present invention principle is not departed from, some improvement and deformation can also be made, these improve and deform
Also should be regarded as protection scope of the present invention.
Claims (7)
1. a kind of region net load interaction active power controller method based on distribution voltage-regulation, it is characterised in that：When power network hair
Raw frequency unstability by comprehensive pressure regulation method, it is necessary to during distribution active power controller, in the qualified limits of voltage, be adjusted and matched somebody with somebody
Net side burden with power is matched somebody with somebody in voltage on line side, regulation, for power network provides power support.
2. a kind of region net load interaction active power controller method based on distribution voltage-regulation according to claim 1,
It is characterized in that：Voltage on line side is matched somebody with somebody by the reduction of comprehensive pressure regulation method, is reduced and is matched somebody with somebody net side burden with power.
3. a kind of region net load interaction active power controller side based on distribution voltage-regulation according to claim 1 and 2
Method, it is characterised in that：The process of comprehensive pressure regulation method includes the switching of reactive-load compensation equipment and the tap of ULTC
Head position adjustments.
4. a kind of region net load interaction active power controller method based on distribution voltage-regulation according to claim 3,
It is characterized in that：Comprehensive pressure regulation method is according to preferential switching reactive-load compensation equipment, then adjusts on-load transformer tap changer
Principle is carried out.
5. a kind of region net load interaction active power controller method based on distribution voltage-regulation according to claim 4,
It is characterized in that：The detailed process of the region net load interaction active power controller method is,
S1）During power network occurrence frequency unstability, start distribution active power controller, implement to downward in the qualified limits of voltage
It is whole；
S2）Calculate the idle adjustable nargin of each substation bus bar；
S3）Cut off each in the reactive-load compensation equipment thrown successively, while monitoring ensures that each substation bus bar voltage is not out-of-limit；
S4）Judge whether the reactive-load compensation equipment that can not be cut, if it is not, then step S2 is gone to, if it is, going to step
S5；
S5）The tap for calculating each transformer station's ULTC can lower gear number；
S6）Regulation ULTC gear, ensures that mesolow side voltage is not out-of-limit while monitoring downwards；
S7）Judge whether without adjustable ULTC, if it is not, then step S6 is gone to, if it is, terminating.
6. a kind of region net load interaction active power controller method based on distribution voltage-regulation according to claim 5,
It is characterized in that：Reactive-load compensation equipment is capacitor bank.
7. a kind of region net load interaction active power controller method based on distribution voltage-regulation according to claim 6,
It is characterized in that：By the way that capacitor bank number and the idle adjustable nargin of each substation bus bar of calculation of capacity can be cut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710066562.XA CN106712039A (en) | 2017-02-07 | 2017-02-07 | Distribution network voltage regulation-based regional network load interaction active power control method |
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| CN201710066562.XA CN106712039A (en) | 2017-02-07 | 2017-02-07 | Distribution network voltage regulation-based regional network load interaction active power control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108011404A (en) * | 2017-12-11 | 2018-05-08 | 国网江苏省电力有限公司经济技术研究院 | A kind of electric system control method for coordinating under fault occurrences |
| CN113692683A (en) * | 2019-04-17 | 2021-11-23 | 西门子股份公司 | Control device and method for controlling the power consumption and/or power output of an energy system, and low-voltage power supply system |
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| CN101106274A (en) * | 2007-08-23 | 2008-01-16 | 上海交通大学 | Powerless voltage automatic control system for area power grid |
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| CN101976847A (en) * | 2010-11-05 | 2011-02-16 | 福建省电力有限公司泉州电业局 | SVC (Static Var Compensator) and AVC (Automatic Voltage Control) joint debugging control system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108011404A (en) * | 2017-12-11 | 2018-05-08 | 国网江苏省电力有限公司经济技术研究院 | A kind of electric system control method for coordinating under fault occurrences |
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| CN113692683A (en) * | 2019-04-17 | 2021-11-23 | 西门子股份公司 | Control device and method for controlling the power consumption and/or power output of an energy system, and low-voltage power supply system |
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Application publication date: 20170524 |
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| RJ01 | Rejection of invention patent application after publication |