CN114336654A - Regional automatic voltage control system architecture based on photovoltaic regulation - Google Patents
Regional automatic voltage control system architecture based on photovoltaic regulation Download PDFInfo
- Publication number
- CN114336654A CN114336654A CN202111515492.4A CN202111515492A CN114336654A CN 114336654 A CN114336654 A CN 114336654A CN 202111515492 A CN202111515492 A CN 202111515492A CN 114336654 A CN114336654 A CN 114336654A
- Authority
- CN
- China
- Prior art keywords
- regulation
- power
- control center
- avc
- reactive
- 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.)
- Pending
Links
- 238000004364 calculation method Methods 0.000 claims abstract description 40
- 238000012795 verification Methods 0.000 claims abstract description 12
- 238000005457 optimization Methods 0.000 claims abstract description 10
- 238000004458 analytical method Methods 0.000 claims abstract description 8
- 238000005516 engineering process Methods 0.000 claims abstract description 7
- 238000003012 network analysis Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000003068 static effect Effects 0.000 claims abstract description 5
- 238000010248 power generation Methods 0.000 claims description 11
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000013473 artificial intelligence Methods 0.000 abstract description 5
- 230000008859 change Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
-
- 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
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention provides a regional automatic voltage control system architecture based on photovoltaic regulation. Comprising the step 1): the basic principle of reactive compensation is layered and zoned local compensation; step 2): the local-level regulation center and the provincial-level regulation center perform power flow optimization in the region according to the ultra-short-term prediction result, and an AVC system is used for pre-issuing reactive power regulation instructions to the region; step 3): performing state estimation calculation, dispatcher load flow calculation, static safety analysis and short-circuit current calculation and verification system safety stability analysis according to a pre-issued instruction; step 4): and 3) formally issuing reactive power regulation instructions to each transformer substation and each power plant after the verification is passed. The ultra-short term prediction technology based on artificial intelligence combines the provincial level regulation and control center and the local level regulation and control center to perform reactive power optimization on the region including the photovoltaic power station according to AVC and the functions of state estimation and load flow calculation in network analysis and application, thereby realizing automatic voltage control. The method is suitable for automatic voltage control application.
Description
Technical Field
The invention relates to automatic voltage control in the field of electric power, in particular to a regional automatic voltage control system architecture based on photovoltaic regulation.
Background
At present, reactive power optimization has great significance for reducing network loss, improving voltage quality of a power system and ensuring safe and economic operation of the system. Along with the increase of the capacity of the photovoltaic power station, the reactive loss in the photovoltaic power station is gradually increased, and further the active loss in the photovoltaic power station and the active loss of a power transmission line are increased. At present, more and more AVC systems are put into use in national provincial networks, and the AVC systems play a positive role in the aspects of optimizing voltage quality, improving system safety level and the like. The reactive power regulation instruction is issued in advance by combining the ultra-short term prediction technology based on artificial intelligence, the system operation efficiency is improved, and the method has important practical significance for improving the user side electric energy quality, improving the power supply reliability of a power distribution network and ensuring the stability of a photovoltaic power generation system.
Disclosure of Invention
In order to change the reactive flow of a system caused by the change of the generating capacity of a photovoltaic power station, realize the layered and partitioned local compensation of the reactive power compensation and reduce the flow between the system and the photovoltaic power station, thereby reducing the active loss of a power transmission line, reducing the operating pressure of a power grid, ensuring the quality of electric energy and reducing the operating cost, the invention provides a regional automatic voltage control system architecture based on photovoltaic regulation. The framework utilizes an artificial intelligence-based ultra-short term prediction technology combined with a provincial regulation center and a local-city regulation center to perform reactive power optimization on a region including a photovoltaic power station according to AVC through state estimation and load flow calculation functions in network analysis application, so that automatic voltage control is realized, and the technical problem of automatic voltage control is solved.
The technical scheme adopted by the invention for solving the technical problems is as follows:
an area automatic voltage control system architecture based on photovoltaic regulation, comprising the steps of:
step 1): the basic principle of reactive compensation is layered and partitioned local compensation, and the reactive loss of a photovoltaic power station is gradually increased along with the continuous increase of the light receiving and emitting capacity, so that the active loss in the photovoltaic power station and the active loss of a power transmission network are increased; the development of artificial intelligence can accurately predict load and power generation amount, introduce photovoltaic and load ultra-short term prediction technology into AVC, and complete reactive power optimization in advance according to accurate prediction;
step 2): the local-level regulation center and the provincial-level regulation center perform power flow optimization in the region according to the ultra-short-term prediction result, and an AVC system is used for pre-issuing reactive power regulation instructions to the region;
step 3): performing state estimation calculation, dispatcher load flow calculation, static safety analysis and short-circuit current calculation and verification system safety stability analysis according to a pre-issued instruction;
step 4): and 3) formally issuing reactive power regulation instructions to each transformer substation and each power plant after the verification is passed.
The method has the advantages that the ultra-short term prediction technology based on artificial intelligence is combined with the provincial level regulation center and the local level regulation center, and the state estimation and load flow calculation functions in network analysis application are used for optimizing the reactive power in the area containing the photovoltaic power station according to AVC, so that automatic voltage control is realized. The method has the advantages that the load, the generated energy and the like are accurately predicted, AVC is combined with ultra-short-term prediction technologies such as photovoltaic and load, reactive power optimization is completed in advance according to accurate prediction, the real-time voltage regulation of an AVC system is matched, the system reaction speed is increased, the system operation efficiency is improved, the power quality of a user side is improved, the power supply reliability of a power distribution network is improved, and the stability of a photovoltaic power generation system is guaranteed. The photovoltaic regulation-based regional automatic voltage control system is suitable for being applied to a regional automatic voltage control system architecture based on photovoltaic regulation.
Drawings
Fig. 1 is a flow chart of a regional automatic voltage control system architecture based on photovoltaic regulation according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in the figure, a regional automatic voltage control system architecture based on photovoltaic regulation comprises the following steps:
step 1: provincial level regulation and control center obtains ultra-short term load prediction calculation results of 220kV and above transformer substations in various regions
Power generation prediction calculation
And each region reactive compensation adjustable capacity
。
Wherein:
the maximum adjustable reactive capacity of the nth region is shown,
the area can be represented to increase the reactive capacity,
the regional reducible reactive capacity is represented.
Step 2: the provincial level regulation and control center network analysis and application predicts and calculates results according to the ultra-short term load of 220kV and above transformer substations in each region in step 1
Power generation prediction calculation
And performing state estimation, removing bad data and performing optimal power flow calculation.
And step 3: the provincial level control center AVC system issues reactive power regulation instructions to various local level control centers according to the calculation result in the step 2, and the regulation quantity is
。
And 4, step 4: and the city level regulation and control center acquires the ultra-short term power generation amount prediction and load prediction calculation results of each power plant in the region to which the city level regulation and control center belongs.
And 5: the photovoltaic power station calculates the reactive power regulating quantity in the ultra-short term prediction time according to the ultra-short term load prediction result
And the reactive power regulating quantity is uploaded to a local city level regulation and control center AVC system.
Step 6: and (4) performing state estimation and removing bad data according to the ultra-short term power generation prediction and load prediction calculation results in the jurisdiction range of the metro-level control center in the step (4) and then performing load flow calculation by the metro-level control center network analysis application.
And 7: and (4) calculating reactive power regulating quantities of all the transformer substations and the power plants by the local grade control center AVC according to the load flow calculation result in the step (6)
And issuing a regulation instruction to power plants such as a distribution network AVC and a photovoltaic power station and a user AVC through a data network.
And 8: and acquiring a distribution network ultra-short-term load prediction calculation result, calculating the reactive power regulation quantity of each distribution network load line by the distribution network AVC, and issuing a reactive power regulation instruction to reactive power compensation devices such as distribution network lines SVG and SVC, regional distributed photovoltaic centralized controllers accessed by the distribution network and a photovoltaic power station AVC system in a wireless transmission mode.
And step 9: and carrying out safety verification on the system network in the jurisdiction range of the local regulation and control center.
Step 10: and the local grade control center AVC system feeds the reactive power regulating quantity back to the provincial grade control center AVC system, and the provincial grade control center AVC system calculates the residual reactive power regulating quantity of the region.
Step 11: and (4) issuing a reactive power regulation instruction to the transformer substation and the power plant governed by the provincial level regulation and control center through an AVC system according to the calculation result in the step 10.
Step 12: and the substation and the power plant to which the provincial regulation and control center belongs receive the AVC control instruction of the provincial regulation and control center, and after safety verification, the provincial regulation and control center issues the regulation instruction to reactive power compensation devices such as SVG (scalable vector graphics) and SVC (scalable video coding) in the substation and feeds the result back to the AVC system of the provincial regulation and control center.
Step 13: and the provincial level regulation and control center performs state estimation calculation, dispatcher load flow calculation, static safety analysis and short circuit current calculation on the power grid in the region according to the feedback results of all the parts to verify the safety and stability of the system, and issues an instruction execution command at the corresponding time step by step after verification is successful.
The working principle of the invention is as follows:
in order to improve the new energy consumption capacity and reduce light abandonment, a power grid needs to accept photovoltaic on-line power as much as possible, the on-line power can continuously fluctuate along with different illumination intensities every day, in order to reduce the voltage change of the power grid caused by output fluctuation after the photovoltaic power station is accessed, improve the system stability, prevent voltage collapse, improve the transmission capacity and reduce active loss, the photovoltaic power station needs to use an AVC system to adjust the reactive output power of reactive compensation devices such as SVC, SVG and inverters in the station in real time according to the generated energy, and meanwhile, the photovoltaic power station is matched with a regulation and control center to perform reactive optimization in a region.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (2)
1. A regional automatic voltage control system architecture based on photovoltaic regulation is characterized in that: the method comprises the following steps:
step 1): the basic principle of reactive compensation is layered and partitioned local compensation, a photovoltaic and load ultra-short term prediction technology is introduced into AVC, and reactive optimization is completed in advance according to accurate prediction;
step 2): the local-level regulation center and the provincial-level regulation center perform power flow optimization in the region according to the ultra-short-term prediction result, and an AVC system is used for pre-issuing reactive power regulation instructions to the region;
step 3): performing state estimation calculation, dispatcher load flow calculation, static safety analysis and short-circuit current calculation and verification system safety stability analysis according to a pre-issued instruction;
step 4): and 3) formally issuing reactive power regulation instructions to each transformer substation and each power plant after the verification is passed.
2. The pv regulation-based regional automatic voltage control system architecture of claim 1, wherein: the step 2) comprises the following steps:
step 1: provincial level regulation and control center obtains ultra-short term load prediction calculation results of 220kV and above transformer substations in various regions
Power generation prediction calculation
And each region reactive compensation adjustable capacity
；
Wherein:
the maximum adjustable reactive capacity of the nth region is shown,
the area can be represented to increase the reactive capacity,
the regional reducible reactive capacity is represented;
step 2: the provincial level regulation and control center network analysis and application predicts and calculates results according to the ultra-short term load of 220kV and above transformer substations in each region in step 1
Power generation prediction calculation
Performing state estimation, eliminating bad data and performing optimal power flow calculation;
and step 3: the provincial level control center AVC system issues reactive power regulation instructions to various local level control centers according to the calculation result in the step 2, and the regulation quantity is
；
And 4, step 4: the method comprises the steps that a metro-level regulation center obtains the ultra-short-term power generation amount prediction and load prediction calculation results of each power plant in a region to which the metro-level regulation center belongs;
and 5: light (es)The volt power station calculates the reactive power regulating quantity in the ultra-short term prediction time according to the ultra-short term load prediction result
And the reactive power regulating quantity is sent to a local grade control center AVC system;
step 6: performing state estimation and removing bad data according to the ultra-short term power generation prediction and load prediction calculation results in the jurisdiction range of the metro-level control center in the step 4 by the metro-level control center network analysis application, and then performing load flow calculation;
and 7: and (4) calculating reactive power regulating quantities of all the transformer substations and the power plants by the local grade control center AVC according to the load flow calculation result in the step (6)
And issuing a regulation instruction to a distribution network AVC, a photovoltaic power station power plant and a user AVC through a data network;
and 8: acquiring a distribution network ultra-short-term load prediction calculation result, calculating the reactive power regulation quantity of each distribution network load line by the distribution network AVC, and issuing a reactive power regulation instruction to the distribution network line SVG, the SVC reactive power compensation device, the regional distributed photovoltaic centralized controller accessed by the distribution network and the photovoltaic power station AVC system in a wireless transmission mode;
and step 9: carrying out safety verification on a system network in the jurisdiction range of a local level regulation and control center;
step 10: the local-level regulation and control center AVC system feeds the reactive power regulating quantity back to the provincial-level regulation and control center AVC system, and the provincial-level regulation and control center AVC system calculates the residual reactive power regulating quantity of the region;
step 11: issuing a reactive power regulation instruction to a transformer substation and a power plant governed by a provincial level regulation and control center through an AVC system according to the calculation result in the step 10;
step 12: the substation and the power plant to which the provincial regulation and control center belongs receive an AVC control instruction of the provincial regulation and control center, and after safety verification, the substation sends a regulation instruction to SVG and SVC reactive power compensation devices in the substation and feeds back the result to an AVC system of the provincial regulation and control center;
step 13: and the provincial level regulation and control center performs state estimation calculation, dispatcher load flow calculation, static safety analysis and short circuit current calculation on the power grid in the region according to the feedback results of all the parts to verify the safety and stability of the system, and issues an instruction execution command at the corresponding time step by step after verification is successful.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111515492.4A CN114336654A (en) | 2021-12-13 | 2021-12-13 | Regional automatic voltage control system architecture based on photovoltaic regulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111515492.4A CN114336654A (en) | 2021-12-13 | 2021-12-13 | Regional automatic voltage control system architecture based on photovoltaic regulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114336654A true CN114336654A (en) | 2022-04-12 |
Family
ID=81051582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111515492.4A Pending CN114336654A (en) | 2021-12-13 | 2021-12-13 | Regional automatic voltage control system architecture based on photovoltaic regulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114336654A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110994626A (en) * | 2019-12-31 | 2020-04-10 | 云南电网有限责任公司昆明供电局 | Automatic voltage control method for 500-220kV regional power grid based on voltage trend prediction |
| CN111047105A (en) * | 2019-12-20 | 2020-04-21 | 华东电力试验研究院有限公司 | Method for optimizing configuration of wind power generation device |
-
2021
- 2021-12-13 CN CN202111515492.4A patent/CN114336654A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111047105A (en) * | 2019-12-20 | 2020-04-21 | 华东电力试验研究院有限公司 | Method for optimizing configuration of wind power generation device |
| CN110994626A (en) * | 2019-12-31 | 2020-04-10 | 云南电网有限责任公司昆明供电局 | Automatic voltage control method for 500-220kV regional power grid based on voltage trend prediction |
Non-Patent Citations (7)
| Title |
|---|
| 张立群;: "地区电网无功电压分布式二级控制系统在金华电网中的应用", 计算机时代, no. 03, 2 March 2008 (2008-03-02), pages 30 - 32 * |
| 李旻 等: "四川电网多级AVC系统协调控制及实现", 《华东电力》, vol. 41, no. 1, 24 January 2013 (2013-01-24), pages 0115 - 0118 * |
| 李旻;唐永红;徐琳;林瑞星;范宏;丁会凯;: "四川电网多级AVC系统协调控制及实现", 华东电力, no. 01, 24 January 2013 (2013-01-24), pages 0115 - 0118 * |
| 段登伟;洪行旅;刘宇;: "一种基于混合模式的自动电压控制系统在地区电网中的应用", 电气应用, no. 05, 5 February 2010 (2010-02-05), pages 50 - 54 * |
| 胡伟 等: "基于分层控制的AGC与AVC自动优化协调控制策略", 《电力系统自动化》, vol. 35, no. 15, 10 August 2011 (2011-08-10), pages 40 - 45 * |
| 胡伟;王淑颖;徐飞;张伟;周济;: "基于分层控制的AGC与AVC自动优化协调控制策略", 电力系统自动化, no. 15, 10 August 2011 (2011-08-10), pages 40 - 45 * |
| 郑文彬;: "广西电网自动电压控制系统的应用", 广西电力, no. 05, 28 October 2010 (2010-10-28), pages 22 - 25 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108683179B (en) | Active power distribution network optimal scheduling method and system based on mixed integer linear programming | |
| CN104362648B (en) | A kind of idle phase modulation method of photovoltaic plant | |
| CN103701155B (en) | A kind of photovoltaic combining inverter active power dispatch control method | |
| CN102611118A (en) | Method for comprehensively controlling reactive voltage of wind farm with imported prediction method | |
| CN104269861A (en) | Electromagnetic looped network reactive power ring current optimal control method based on flexible looped network controller | |
| CN108736509A (en) | A kind of active distribution network multi-source coordinating and optimizing control method and system | |
| CN104269847A (en) | Flexible looped network control system operation and power flow optimization method | |
| CN107196316A (en) | Multistage reactive voltage control method for coordinating in active distribution network | |
| CN112784475B (en) | Multi-agent technology-based multi-stage voltage coordination control method for power distribution network | |
| CN103595061A (en) | Enterprise power grid reactive power optimization method and system based on comprehensive benefit analysis | |
| CN104901319A (en) | Photovoltaic power plant AVC control method | |
| CN105226726A (en) | A kind of photovoltaic plant centralized monitoring system | |
| CN109995089A (en) | A kind of distributed generation resource digestion capability appraisal procedure and system | |
| CN103078328B (en) | Automatic voltage control method for unified hierarchical coordination of power grid | |
| CN104332985A (en) | DC distribution network operation control and optimal scheduling method based on hybrid control strategy | |
| CN116094032A (en) | High-permeability photovoltaic access power distribution network Yun Bianduan cooperative energy self-balancing method | |
| CN115481856A (en) | Comprehensive energy system multi-scale scheduling method and system considering comprehensive demand response | |
| CN105048472A (en) | Reactive voltage control method for improving voltage qualified rate of photovoltaic power station | |
| CN100593892C (en) | Enterprise power distribution network synthesis energy saving method | |
| CN102570456A (en) | Distribution network intermittent energy consumption system and method based on active mechanism | |
| CN114336654A (en) | Regional automatic voltage control system architecture based on photovoltaic regulation | |
| Zhou et al. | Hybrid operation control method for micro-grid based on MAS | |
| CN116093931A (en) | Edge-calculation-based source network load storage coordination control system | |
| CN104967130B (en) | The AVC control methods of the convertible power system of networking/isolated network | |
| CN109980656B (en) | Distributed reactive power optimization and voltage regulation and control method for power distribution network under two-layer cooperative architecture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |