CN109802435A - A kind of energy storage configuration place selection method of wind power integration system - Google Patents

A kind of energy storage configuration place selection method of wind power integration system Download PDF

Info

Publication number
CN109802435A
CN109802435A CN201910073481.1A CN201910073481A CN109802435A CN 109802435 A CN109802435 A CN 109802435A CN 201910073481 A CN201910073481 A CN 201910073481A CN 109802435 A CN109802435 A CN 109802435A
Authority
CN
China
Prior art keywords
node
wind power
energy storage
voltage
index
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
Application number
CN201910073481.1A
Other languages
Chinese (zh)
Inventor
薛静玮
叶荣
戴新文
梁开栋
吕贤敏
温步瀛
王怀远
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Fujian Electric Power Co Ltd
Economic and Technological Research Institute of State Grid Fujian Electric Power Co Ltd
Longyan Power Supply Co of State Grid Fujian Electric Power Co Ltd
Original Assignee
State Grid Fujian Electric Power Co Ltd
Economic and Technological Research Institute of State Grid Fujian Electric Power Co Ltd
Longyan Power Supply Co of State Grid Fujian Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Fujian Electric Power Co Ltd, Economic and Technological Research Institute of State Grid Fujian Electric Power Co Ltd, Longyan Power Supply Co of State Grid Fujian Electric Power Co Ltd filed Critical State Grid Fujian Electric Power Co Ltd
Priority to CN201910073481.1A priority Critical patent/CN109802435A/en
Publication of CN109802435A publication Critical patent/CN109802435A/en
Pending legal-status Critical Current

Links

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
    • Y02E10/70—Wind energy
    • Y02E10/76—Power conversion electric or electronic aspects
    • 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
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

Landscapes

  • Supply And Distribution Of Alternating Current (AREA)

Abstract

本发明涉及一种风电接入系统的储能配置地点选择方法，包括以下步骤：步骤S1:将风电并网节点进行等效；步骤S2:通过多端口戴维南等值将局部系统等效成双节点系统，并计算风电接入系统各节点电压不稳定指标；步骤S3:计算各可配置储能的节点对电压稳定性关键地点的灵敏度指标;步骤S4:将所得到的灵敏度指标进行归一化计算；步骤S5:预设门槛值K，并剔除掉灵敏度指标小于K的节点，得到可有效改善电压稳定性的风电接入系统储能配置地点的集合。本发明根据网络构架、实时系统信息和实测风电场出力情况，在考虑电压稳定性的情况下选择有利于风电接入系统电压稳定性的储能配置地点。

The present invention relates to a method for selecting an energy storage configuration location for a wind power access system, comprising the following steps: Step S1: Equating wind power grid-connected nodes; Step S2: Equating the local system into dual nodes through multi-port Thevenin equivalence system, and calculate the voltage instability index of each node of the wind power access system; step S3: calculate the sensitivity index of each node that can be configured with energy storage to the key points of voltage stability; step S4: normalize the obtained sensitivity index to calculate ; Step S5: preset the threshold value K, and remove the nodes whose sensitivity index is less than K to obtain a set of energy storage configuration locations for the wind power access system that can effectively improve voltage stability. According to the network structure, real-time system information and the measured output of the wind farm, the invention selects an energy storage configuration location favorable for the voltage stability of the wind power access system while considering the voltage stability.

Description

A kind of energy storage configuration place selection method of wind power integration system
Technical field
The invention belongs to technical field of power systems, and in particular to a kind of wind power integration system storage for considering voltage stability It can place configuration method.
Background technique
In the electric system of current wind power integration, the investment cost and operating cost in energy storage place, Yi Jiping are mainly taken Pressing down intermittent energy source fluctuation is that foundation carries out the configuration of energy storage place, however energy storage device still may be used other than it can provide power output Multiple functions are taken into account, reasonable energy storage configuration place can be effectively improved the voltage stability of wind power integration system.Therefore, it is necessary to A kind of wind power integration system stored energy place configuration method for considering system voltage stability is designed, Lai Tigao electric system energy storage is set Standby comprehensive utilization, the electric system that intermittent energy source permeability is continuously improved are of great significance.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of energy storage of wind power integration system to configure place selection method, According to network architecture, real-time system information and actual measurement output of wind electric field situation, select to have in the case where considering voltage stability Place is configured conducive to the energy storage of wind power integration system voltage stability.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of energy storage configuration place selection method of wind power integration system, comprising the following steps:
Step S1: wind-electricity integration node is carried out equivalent；
Step S2: it is by multiport Thevenin's equivalence that local system is equivalent at bi-nodal system, and calculate wind power integration system Each unstable index of node voltage；
Step S3: sensitivity index of the node to voltage stability key place of each configurable energy storage is calculated;
Step S4: calculating is normalized in obtained sensitivity index；
Step S5: predetermined threshold level K, and the node that sensitivity index is less than K is weeded out, it obtains that voltage stability can be effectively improved Wind power integration system stored energy configuration place set.
Further, the step S1 specifically:
Wind-electricity integration node injecting power is equivalent to node ground connection admittance
Wherein、Indicate the active and reactive power of wind-powered electricity generation injection；Indicate wind-electricity integration node voltage.
Further, the step S2 specifically:
Step S21: regard wind power integration node as load bus that load is negative;
Step S22: and then multiport Thevenin's equivalence is utilized, multinode power grid is equivalent at nodeiTwo impedances, two node power grid, Each node voltage stability of wind power integration system, index are calculated with spread of voltage index are as follows:
Wherein: wherein、For nodeiAnd nodejInjecting power conjugate vector；、For nodeiAnd nodejSection Point voltage；、For nodeiAnd nodejNode voltage conjugate vector；For nodejWith nodeiMutual impedance； For nodeiFor system equivalent impedance.
1. further, the step S3 specifically: spread of voltage indexSystem voltage stability is embodied, with The maximum node of spread of voltage index is system voltage stability key node:
Assuming that nodeiSpread of voltage index be up to wind power integration system voltage stability key node, then can extract can Reflect the node of configurable energy storagejWith voltage stability key nodeiBetween sensitivity index:
The node of configurable energy storage can effectively be embodiedjTo voltage stability key nodeiSpread of voltage index's Improvement.
Further, it normalizes and calculates described in step S4 specifically:
Wherein:For nodejNormalization after sensitivity index；For the maximum value of all node sensitivity indexs.
Compared with the prior art, the invention has the following beneficial effects:
Present invention only requires the node amplitudes and output of wind electric field situation of knowing partial electric grid information, energy storage node, can obtain To the selection method in the energy storage configuration place for considering system voltage stability.It is compared to existing method, i.e., simple and quick, and can fill Energy storage device effect is waved in distribution, improves system voltage stability.
Detailed description of the invention
Fig. 1 is the method for the present invention flow chart；
Fig. 2 is two impedance of node i, two node power grid of the present invention；
Fig. 3 is IEEE14 node diagram in the embodiment of the present invention.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and embodiments.
Fig. 1 is please referred to, the present invention provides a kind of energy storage configuration place selection method of wind power integration system, including following step Rapid: the present embodiment calculated examples select IEEE14 node system, as shown in Figure 3.Node 2 is wind power integration node, wherein can match The place for setting energy storage is 4,11,13,14 nodes.
Step S1: wind-electricity integration node is carried out to equivalent, calculating wind power integration node equivalent admittance are as follows:
Each load bus voltage stability of wind power integration system is calculated, as a result such as table 1
Each load bus spread of voltage index of table 1
Node ID
14 0.658181
9 0.345479
10 0.31502
7 0.175554
11 0.159696
4 0.118989
5 0.079097
13 0.054656
Step S2: the spread of voltage index of node 14Being up to is 0.658181, is system voltage stability key section Point, to achieve the purpose that improve system voltage stability, is considered as when configuration place is contributed to node when configuring energy storage place The improvement result of 14 voltage stabilities.It is by Thevenin's equivalence, complex electric network is equivalent at nodeiTwo impedances, two node power grid, Its result is as shown in Figure 2.
Step S3: the index of reflecting voltage risk symptoms node and reactive compensation place substantial connection is calculatedS i , result such as table 2 It is shown.Spread of voltage indexSystem voltage stability is embodied, using the maximum node of spread of voltage index as system electricity Press stability key node:
Assuming that nodeiSpread of voltage index be up to wind power integration system voltage stability key node, then can extract can Reflect the node of configurable energy storagejWith voltage stability key nodeiBetween sensitivity index:
The node of configurable energy storage can effectively be embodiedjTo voltage stability key nodeiSpread of voltage index's Improvement.
Each alternative energy storage configuration node of table 2 is to node 14SIndex
Node ID SIndex
14 1.267787
9 0.373303
13 0.262324
11 0.147517
4 0.061516
Step S4: obtained index is normalized, the results are shown in Table 3
Normalized:
Wherein:For nodejNormalization after sensitivity index；For the maximum value of all node sensitivity indexs.
Normalization index of each alternative energy storage configuration node of table 3 to node 14
Node ID Index
14 1
9 0.294453
13 0.206915
11 0.116357
4 0.048522
Step S5: one threshold value of settingK=0.2, it weeds out index and is less thanKNode, obtain significant energy storage configuration node, Node 14, node 9, node 13.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with Modification, is all covered by the present invention.

Claims (5)

1.一种风电接入系统的储能配置地点选择方法,其特征在于，包括以下步骤：1. A method for selecting an energy storage configuration location for a wind power access system, comprising the following steps: 步骤S1:将风电并网节点进行等效；Step S1: Equivalent wind power grid-connected nodes; 步骤S2:通过多端口戴维南等值将局部系统等效成双节点系统，并计算风电接入系统各节点电压不稳定指标；Step S2: Equivalent the local system into a two-node system through the multi-port Thevenin equivalent, and calculate the voltage instability index of each node of the wind power access system; 步骤S3:计算各可配置储能的节点对电压稳定性关键地点的灵敏度指标;Step S3: calculating the sensitivity index of each configurable energy storage node to the key point of voltage stability; 步骤S4:将所得到的灵敏度指标进行归一化计算；Step S4: normalize the obtained sensitivity index; 步骤S5:预设门槛值K，并剔除掉灵敏度指标小于K的节点，得到可有效改善电压稳定性的风电接入系统储能配置地点的集合。Step S5: Presetting a threshold value K, and removing nodes whose sensitivity index is less than K, to obtain a set of energy storage configuration locations for the wind power access system that can effectively improve voltage stability. 2.根据权利要求1所述的 一种风电接入系统的储能配置地点选择方法,其特征在于：所述步骤S1具体为：2. The method for selecting an energy storage configuration location for a wind power access system according to claim 1, wherein the step S1 is specifically: 将风电并网节点注入功率等效为节点接地导纳The injected power of the wind power grid-connected node is equivalent to the grounding admittance of the node 其中、表示风电注入的有功、无功功率；表示风电并网节点电压。in , Indicates the active and reactive power injected by wind power; Indicates the voltage of the wind power grid-connected node. 3.根据权利要求1所述的 一种风电接入系统的储能配置地点选择方法,其特征在于：所述步骤S2具体为：3. The method for selecting an energy storage configuration location for a wind power access system according to claim 1, wherein the step S2 is specifically: 步骤S21:将风电接入节点看做负荷为负的负荷节点;Step S21: regard the wind power access node as a load node with a negative load; 步骤S22:然后利用多端口戴维南等值，将多节点电网等效成节点i两阻抗两节点电网，用电压不稳定指标计算风电接入系统各节点电压稳定性，指标为：Step S22: then using the multi-port Thevenin equivalent, the multi-node power grid is equivalent to a node i two-impedance two-node power grid, and the voltage instability index is used to calculate the voltage stability of each node of the wind power access system, and the index is: 其中：其中、为节点i和节点j的注入功率的共轭向量；、为节点i和节点j的节点电压；、为节点i和节点j的节点电压的共轭向量；为节点j与节点i的互阻抗；为节点i为系统等值阻抗。of which: of which , is the conjugate vector of the injected power of node i and node j ; , is the node voltage of node i and node j ; , is the conjugate vector of the node voltage of node i and node j ; is the mutual impedance between node j and node i ; is the equivalent impedance of the system for node i . 4.根据权利要求3所述的 一种风电接入系统的储能配置地点选择方法,其特征在于：所述步骤S3具体为：电压不稳定指标体现系统电压稳定性，以电压不稳定指标最大的节点为系统电压稳定性关键节点：4. The method for selecting an energy storage configuration location for a wind power access system according to claim 3, wherein the step S3 is specifically: a voltage instability index Reflecting the system voltage stability, the node with the largest voltage instability index is the key node of the system voltage stability: 假设节点i的电压不稳定指标最大为风电接入系统电压稳定性关键节点，则可提取可反映可配置储能的节点j与电压稳定性关键节点i之间的灵敏度指标：Assuming that the maximum voltage instability index of node i is the key node of the voltage stability of the wind power access system, the sensitivity index between node j that can reflect the configurable energy storage and the key node i of voltage stability can be extracted. : 能有效体现可配置储能的节点j对电压稳定性关键节点i的电压不稳定指标的改善效果。 It can effectively reflect the voltage instability index of node j , which can be configured with energy storage, to the key node i of voltage stability. improvement effect. 5.根据权利要求1所述的 一种风电接入系统的储能配置地点选择方法,其特征在于：所述步骤S4的归一化计算具体为：5. The method for selecting an energy storage configuration location for a wind power access system according to claim 1, wherein the normalized calculation in the step S4 is specifically: 其中： 为节点j的归一化后的灵敏度指标；为所有节点灵敏度指标的最大值。in: is the normalized sensitivity index of node j ; is the maximum value of all node sensitivity indicators.
CN201910073481.1A 2019-01-25 2019-01-25 A kind of energy storage configuration place selection method of wind power integration system Pending CN109802435A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910073481.1A CN109802435A (en) 2019-01-25 2019-01-25 A kind of energy storage configuration place selection method of wind power integration system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910073481.1A CN109802435A (en) 2019-01-25 2019-01-25 A kind of energy storage configuration place selection method of wind power integration system

Publications (1)

Publication Number Publication Date
CN109802435A true CN109802435A (en) 2019-05-24

Family

ID=66560473

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910073481.1A Pending CN109802435A (en) 2019-01-25 2019-01-25 A kind of energy storage configuration place selection method of wind power integration system

Country Status (1)

Country Link
CN (1) CN109802435A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110071505A (en) * 2019-06-04 2019-07-30 清华大学 The power transmission network enlarging of the access containing large-scale wind power configures joint planing method with energy storage
CN110556868A (en) * 2019-09-25 2019-12-10 国网福建省电力有限公司 wind power access system energy storage charging and discharging control method considering voltage stability
CN110912164A (en) * 2019-12-13 2020-03-24 国网福建省电力有限公司 A green energy island energy storage capacity allocation method considering voltage stability
CN111460753A (en) * 2020-05-09 2020-07-28 国网湖南省电力有限公司 Method for calculating influence of new energy machine group access on Thevenin equivalent parameters of power grid

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103199554A (en) * 2013-03-15 2013-07-10 国家电网公司 Method for achieving power grid light storage system capacity configuration and optimization distribution
US20140277788A1 (en) * 2012-07-31 2014-09-18 Causam Energy, Inc. System, method, and data packets for messaging for electric power grid elements over a secure internet protocol network
CN105720585A (en) * 2014-12-02 2016-06-29 国家电网公司 Reactive power control method and reactive power control system for wind farm clusters
CN106972523A (en) * 2016-12-27 2017-07-21 国网浙江省电力公司嘉兴供电公司 The Optimizing Site Selection constant volume method of energy-accumulating power station in active power distribution network
CN108923433A (en) * 2018-07-10 2018-11-30 福州大学 A kind of effective cutting load place on-line selection method improving voltage stability

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140277788A1 (en) * 2012-07-31 2014-09-18 Causam Energy, Inc. System, method, and data packets for messaging for electric power grid elements over a secure internet protocol network
CN103199554A (en) * 2013-03-15 2013-07-10 国家电网公司 Method for achieving power grid light storage system capacity configuration and optimization distribution
CN105720585A (en) * 2014-12-02 2016-06-29 国家电网公司 Reactive power control method and reactive power control system for wind farm clusters
CN106972523A (en) * 2016-12-27 2017-07-21 国网浙江省电力公司嘉兴供电公司 The Optimizing Site Selection constant volume method of energy-accumulating power station in active power distribution network
CN108923433A (en) * 2018-07-10 2018-11-30 福州大学 A kind of effective cutting load place on-line selection method improving voltage stability

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
李鹏等: "一种防止电压失稳的切负荷控制方法", 《电网技术》 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110071505A (en) * 2019-06-04 2019-07-30 清华大学 The power transmission network enlarging of the access containing large-scale wind power configures joint planing method with energy storage
CN110071505B (en) * 2019-06-04 2020-09-11 清华大学 Joint planning method for transmission grid expansion and energy storage configuration with large-scale wind power access
CN110556868A (en) * 2019-09-25 2019-12-10 国网福建省电力有限公司 wind power access system energy storage charging and discharging control method considering voltage stability
CN110912164A (en) * 2019-12-13 2020-03-24 国网福建省电力有限公司 A green energy island energy storage capacity allocation method considering voltage stability
CN111460753A (en) * 2020-05-09 2020-07-28 国网湖南省电力有限公司 Method for calculating influence of new energy machine group access on Thevenin equivalent parameters of power grid
CN111460753B (en) * 2020-05-09 2022-04-08 国网湖南省电力有限公司 Method for calculating influence of new energy machine group access on Thevenin equivalent parameters of power grid

Similar Documents

Publication Publication Date Title
CN109802435A (en) A kind of energy storage configuration place selection method of wind power integration system
WO2018103317A1 (en) Universal power flow calculation method for power system comprising upfc
CN105634008B (en) Consider the grid-connected posterior probability line loss methodology of distributed wind-power generator of wind speed intensity
CN106532710B (en) Microgrid power flow optimization method considering voltage stability constraints
CN105119277B (en) A kind of practical method of THE UPFC addressing
US20240162715A1 (en) Method for group coordinated voltage control of photovoltaic inverters in low-voltage distribution network
CN106446458A (en) Weakly looped power distribution network load flow calculation method considering distributed power supplies
CN116565842A (en) A distribution network resilience assessment method, system and equipment based on multi-source coordination strategy
CN106779313A (en) Multiple target distributed power source addressing constant volume method based on mixed integer programming
CN111541280A (en) Power grid wind power maximum permeability evaluation method considering static voltage stability constraint
CN109301870B (en) A capacity optimization method for power electronic multi-feed power system
CN105932673B (en) A kind of external network equivalent method of the large-scale interconnected power system containing extensive new energy
CN112039119A (en) A distribution network voltage control method and system including photovoltaic access
CN106786629A (en) A kind of wind field inside reactive voltage control method for coordinating
CN115021308A (en) A calculation method of distributed photovoltaic carrying capacity in distribution network considering load off-grid
CN107196307B (en) A Method for Fast Estimation of Power Grid Active Power Flow After Transformer Fault
CN111900736B (en) An improved forward-backward generation method for power flow calculation in distribution network
CN116885722A (en) Wind power dynamic power control system and method for distribution network low-voltage management
CN107465195A (en) A kind of optimal load flow bilayer alternative manner based on micro-capacitance sensor combination Load flow calculation
CN118014402B (en) Photovoltaic access power distribution network capacity assessment method and system based on power supply distance measurement
CN113270861B (en) Limit capacity calculation method for accessing renewable energy into power grid
CN105337277B (en) The computational methods that power distribution network project yet to be built is affected on rate of qualified voltage
CN109066786A (en) Consider that the power distribution network photovoltaic maximum penetration level of voltage's distribiuting factor determines method
CN112366703B (en) A multi-distributed photovoltaic grid-connected node optimization method and system
CN108879674A (en) A kind of extra-high voltage networking is optimal outer by electric proportional algorithm

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
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20190524