CN112994235B - Automatic radiation type power grid risk early warning method based on switch information - Google Patents
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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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
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Abstract
Description
技术领域Technical field
本公开涉及电网风险预警技术领域,具体涉及一种基于开关信息的辐射型电网风险自动预警方法。The present disclosure relates to the technical field of power grid risk early warning, and specifically relates to a radiation-type power grid risk automatic early warning method based on switch information.
背景技术Background technique
随着电网的发展,调控运行管理任务日趋复杂,电网风险管理难度越来越大,能够在线分析电网风险并实现自动预警对调度运行工作来说意义重大。现有的风险预警方法多是从设备和电网的角度,考虑因素主要是设备的老化、故障,电网的稳定极限、运行极限,恶劣天气的环境因素以及人为误操作等,分析方法上大多是基于潮流计算或概率潮流计算,通过建立概率模型,根据概率大小和可能引起的事故后果程度衡量风险大小,进行风险预警。With the development of power grids, control, operation and management tasks are becoming increasingly complex, and power grid risk management is becoming more and more difficult. Being able to analyze power grid risks online and achieve automatic early warning is of great significance to dispatching operations. Existing risk early warning methods are mostly from the perspective of equipment and power grids. Factors considered are mainly the aging and failure of equipment, the stability limit and operating limit of the power grid, environmental factors of severe weather and human misoperation, etc. Most of the analysis methods are based on Power flow calculation or probabilistic power flow calculation, by establishing a probability model, measures the risk based on the probability and the degree of possible accident consequences, and carries out risk warning.
上述方法能够较为全面的评价电网整体风险水平,但往往计算量很大,涉及的因素较为复杂,受各方面误差的影响。在调度运行工作中,调度员更为关注在计划检修或者临时方式调整时,某个开关变位将对电网造成什么样的影响,是否构成电网事件或者产生电网风险,因此现有的方法不是针对电网事件进行风险预警,实用性不高。The above methods can more comprehensively evaluate the overall risk level of the power grid, but they often require a large amount of calculations, involve complex factors, and are affected by errors in various aspects. In dispatching operation work, dispatchers are more concerned about the impact that a certain switch position will have on the power grid during planned maintenance or temporary mode adjustment, and whether it constitutes a power grid event or generates power grid risks. Therefore, the existing methods are not targeted at Risk warning for power grid events is not very practical.
发明内容Contents of the invention
本申请的目的是针对以上问题,提供一种基于开关信息的辐射型电网风险自动预警方法。The purpose of this application is to provide an automatic early warning method for radial power grid risks based on switch information in response to the above problems.
第一方面,本申请提供一种基于开关信息的辐射型电网风险自动预警方法,包括以下步骤:In the first aspect, this application provides an automatic early warning method for radiated power grid risks based on switch information, which includes the following steps:
S1、制定风险分析目标开关确定原则;S1. Develop risk analysis target switch determination principles;
S2、集合形成关于目标开关的关联开关集;S2. Set to form an associated switch set about the target switch;
S3、计算目标开关的有效电路径数量;S3. Calculate the number of effective electrical paths of the target switch;
S4、判断目标开关的风险类型;S4. Determine the risk type of the target switch;
S5、计算负荷损失及负荷损失比例;S5. Calculate load loss and load loss ratio;
S6、风险定级,发布预警信息。S6. Risk grading and issuing early warning information.
根据本申请实施例提供的技术方案,S2步骤具体包括:According to the technical solution provided by the embodiment of this application, step S2 specifically includes:
选择启动开关,根据启动开关确定风险分析目标开关;Select the startup switch and determine the risk analysis target switch based on the startup switch;
(1)如果启动开关是线路开关,目标开关确定原则为:(1) If the starting switch is a line switch, the target switch determination principle is:
1)如果启动开关对侧开关位置值为0,则对侧开关断开,开始判断自投状态:1) If the position value of the switch on the opposite side of the start switch is 0, the switch on the opposite side is turned off and the self-throwing status is determined:
i.如果自投状态值为0,则线路定义为停电状态,无目标开关;i. If the self-throwing status value is 0, the line is defined as a power outage and there is no target switch;
ii.如果自投状态值为1,则线路定义为备用电源状态,确定目标开关为对侧开关;ii. If the self-throwing state value is 1, the line is defined as the backup power state, and the target switch is determined to be the opposite switch;
2)如果启动开关对侧开关位置值为1,则对侧开关合位,开始判断功率流向:2) If the position value of the switch on the opposite side of the start switch is 1, the switch on the opposite side is closed and the power flow direction begins to be determined:
i.如果启动开关的功率流向为正,则确定目标开关为对侧开关;i. If the power flow direction of the start switch is positive, determine the target switch to be the opposite switch;
ii.如果启动开关的功率流向为负,则确定目标开关为启动开关;ii. If the power flow direction of the start switch is negative, determine the target switch as the start switch;
(2)如果启动开关是母联开关,则将全部线路开关设定为启动开关并依次开始分析;(2) If the starting switch is a bus tie switch, set all line switches as starting switches and start analysis in sequence;
(3)如果启动开关是受总开关,目标开关确定原则为:(3) If the start switch is controlled by the main switch, the target switch determination principle is:
1)如果启动开关为高压受总开关,等效为同时选择主变的中压受总开关和低压受总开关为启动开关;1) If the starting switch is the high-voltage receiving main switch, it is equivalent to selecting the medium-voltage receiving main switch and the low-voltage receiving main switch of the main transformer as the starting switches at the same time;
2)如果启动开关为非高压受总开关,等效为同电压等级线路开关,并将变电站其它同电压等级受总开关类型替换为线路开关,定义其对侧开关运算值为1。2) If the starting switch is a non-high-voltage main switch, it is equivalent to a line switch of the same voltage level. Replace other main switch types of the same voltage level in the substation with line switches and define the operation value of the opposite side switch as 1.
根据本申请实施例提供的技术方案,所述集合形成关于目标开关的关联开关集,具体包括:在开关信息矩阵中筛选与目标开关站名相同的全部开关,并在其中筛选进线开关线路的对侧开关,将以上所有开关构成关联开关集,并对所有开关进线重新编号。According to the technical solution provided by the embodiment of the present application, the set forms an associated switch set about the target switch, which specifically includes: screening all switches with the same name as the target switch station in the switch information matrix, and screening the incoming switch lines therein. For the switch on the opposite side, all the above switches form an associated switch set, and all switch incoming lines are renumbered.
根据本申请实施例提供的技术方案,S3步骤具体包括:According to the technical solution provided by the embodiment of this application, step S3 specifically includes:
(1) (1)
式中,i表示第i个进线开关,x表示关联开关集中共x个进线开关;In the formula, i represents the i -th incoming line switch, x represents a total of x incoming line switches in the associated switch set;
对编号为i的进线开关,其开关位置值为,开关闭合时位置值为1,开关断开时位置值为0;For the incoming line switch numbered i , its switch position value is , the position value is 1 when the switch is closed, and the position value is 0 when the switch is open;
对编号为i的进线开关,其开关自投状态值为,自投投入时状态值为1,自投退出时状态值0;For the incoming line switch numbered i , the switch self-turning state value is , the status value is 1 when self-investment is put in, and the status value is 0 when self-investment is exited;
对编号为i的进线开关,其开关运算值为,且/>;For the incoming line switch numbered i , the switch operation value is , and/> ;
为第i个进线开关所在线路的运算值,令其对侧开关编号为j,则/>; is the calculated value of the line where the i- th incoming switch is located, and the number of the switch on the opposite side is j , then/> ;
对编号为i的母线开关,其开关位置值为,开关闭合时位置值为1,开关断开时位置值为0;For the bus switch numbered i , its switch position value is , the position value is 1 when the switch is closed, and the position value is 0 when the switch is open;
对编号为i的母线开关,其开关自投状态值为,自投投入时状态值为1,自投退出时状态值0;For the bus switch numbered i , the switch self-turning state value is , the status value is 1 when self-investment is put in, and the status value is 0 when self-investment is exited;
对编号为i的母线开关,其开关运算值为,且/>;For the bus switch numbered i , its switching operation value is , and/> ;
为母联系数,对于与目标开关运行在相同母线上的进线开关,其母联系数取1,对于与目标开关不运行在相同母线上的开关,其母联系数等于两条母线间的母联/分段开关运算值之积,/>。 is the bus link coefficient. For the incoming switch running on the same bus as the target switch, the bus link coefficient is 1. For the switch not running on the same bus as the target switch, the bus link coefficient is equal to the bus link between the two buses. The product of joint/segment switch operation values,/> .
根据本申请实施例提供的技术方案,S4步骤具体包括:According to the technical solution provided by the embodiment of this application, step S4 specifically includes:
S41、当0<K<K0时,则当前存在N-1停电风险,其中K0的数值设置为1.2~1.5;S41. When 0<K<K 0 , there is currently a risk of N-1 power outage, where the value of K 0 is set to 1.2~1.5;
S42、当K0<K<K1时,则拉开启动开关后,风险目标分析开关所在变电站会出现N-1停电风险,其中K1的数值设置为2.2~2.5;S42. When K 0 <K <K 1 , after pulling the start switch, N-1 power outage risk will occur in the substation where the risk target analysis switch is located, where the value of K 1 is set to 2.2~2.5;
S43、风险类型判断:当存在S41或S42步骤的风险时,若对应电压等级的最小、最大号母线间的母联系数=1,则判定为存在N-1母线全停风险,同时若满足母线电压等级等于该站最高电压等级,则进一步判定为全站停电风险;若/>=0,则判定为存在N-1母线停电风险;S43. Risk type judgment: When there is a risk in step S41 or S42, if the bus tie coefficient between the minimum and maximum busbars corresponding to the voltage level =1, then it is determined that there is a risk of N-1 bus total outage. At the same time, if the bus voltage level is equal to the highest voltage level of the station, then it is further determined that there is a risk of total station power outage; if/> =0, then it is determined that there is a risk of N-1 bus power outage;
S44、统计同一变电站同电压等级母线N-1停电风险数量n,当n=n0时,则将风险类型修正为N-1母线全停风险,返回S43步骤,其中n0为该电压等级母线数量;将存在N-1停电风险母线的对应编号的低压母线间母联运算值置为0;S44. Count the number n of N-1 power outage risks for buses of the same voltage level in the same substation. When n=n 0 , the risk type is corrected to the N-1 bus total outage risk, and return to step S43, where n 0 is the voltage level bus. Quantity; set the bus connection operation value of the corresponding number of low-voltage buses with N-1 power outage risk buses to 0;
S45、寻找同电压等级受端变电站风险,如果对目标开关分析判定结果为所在变电站存在N-1停电风险,则选定对应母线上所有功率方向为正的开关作为启动开关,寻找关联开关集,进行有效供电路径计算,且存在N-1风险判据为:K-1<K0。S45. Find risks in receiving substations of the same voltage level. If the analysis and determination result of the target switch indicates that the substation has N-1 power outage risk, then select all switches with positive power direction on the corresponding bus as the start switch and find the associated switch set. Calculate the effective power supply path, and the criterion for the existence of N-1 risks is: K-1<K 0 .
根据本申请实施例提供的技术方案,S5步骤具体包括:According to the technical solution provided by the embodiment of this application, step S5 specifically includes:
S51、以S4步骤得到的风险集合为目标,将高压母线N-1停电风险等效为母线上的高压受总N-1停电,进而等效为对应主变的中、低压侧总受开关N-1停电,此时低压母线的停电风险判据为:K<K0;S51. Taking the risk set obtained in step S4 as the target, the high-voltage bus N-1 power outage risk is equivalent to the high-voltage receiving total N-1 power outage on the bus, and then equivalent to the medium- and low-voltage side total receiving switches N corresponding to the main transformer. -1 power outage. At this time, the power outage risk criterion of the low-voltage bus is: K<K 0 ;
S52、以上述S51步骤中存在N-1停电风险的中、低压母线为目标,将母线上全部线路开关设定为启动开关,重复S4步骤,寻找下级风险点;S52. Target the medium and low-voltage buses with N-1 power outage risk in the above S51 step, set all line switches on the bus as start switches, repeat step S4, and find lower-level risk points;
S53、重复S4-S51步骤,直至寻到的母线电压等级为35kV或10kV;S53. Repeat steps S4-S51 until the found bus voltage level is 35kV or 10kV;
S54、负荷损失统计,以遍寻得到的存在停电风险的全部35kV、10kV母线为目标,累加全部出线在目标开关变位或模拟变位前一采样时刻的有功功率值,得到负荷损失大小SΣ;S54, load loss statistics, take all 35kV and 10kV buses that are at risk of power outage as the target, accumulate the active power values of all outlets at the sampling moment before the target switch displacement or simulated displacement, and obtain the load loss size S Σ ;
S55、计算负荷损失比例,根据负荷区域属性,分别计算各个地区负荷损失大小S1、S2、S3、……,分别与同一时刻各地区负荷总量作比,得到负荷损失比例S1%、S2%、S3%、……。S55. Calculate the load loss proportion. According to the load area attributes, calculate the load loss sizes S 1 , S 2 , S 3 , ... in each region respectively, and compare them with the total load in each region at the same time to obtain the load loss proportion S 1 % , S 2 %, S 3 %,….
根据本申请实施例提供的技术方案,所述风险定级,发布预警信息,具体包括:According to the technical solutions provided by the embodiments of this application, the risk grading and early warning information release specifically include:
将N-1风险事件类型与负荷损失及负荷损失比例与风险事件库匹配进行风险定级,生成预警信息;Match the N-1 risk event type with load loss and load loss proportion with the risk event database to perform risk rating and generate early warning information;
通过D5000系统弹窗发布电网风险预警。Publish power grid risk warning through the D5000 system pop-up window.
本发明的有益效果:本申请提供一种基于开关信息的辐射型电网风险自动预警方法,从地区电网调度运行工作实际需要出发,以地区电网的重大风险事件预警为目标,从开关的位置信息、自投状态、流过功率方向信息中构造逻辑判据,在线分析可能存在的电网风险事件,计算事件等级,并进行预警,为调度运行值班人员提供最直观的电网风险判断。Beneficial effects of the present invention: This application provides a radial power grid risk automatic early warning method based on switch information, starting from the actual needs of regional power grid dispatching operations, aiming at early warning of major risk events in the regional power grid, and based on the location information of switches, Logical criteria are constructed from the automatic switching status and flowing power direction information to analyze possible grid risk events online, calculate event levels, and provide early warning to provide the most intuitive grid risk judgment for dispatch and operation personnel.
附图说明Description of drawings
图1为本申请第一种实施例的流程图;Figure 1 is a flow chart of the first embodiment of the present application;
图2为本申请第一种实施例的具体实例的电网连接示意图。Figure 2 is a schematic diagram of a power grid connection of a specific example of the first embodiment of the present application.
具体实施方式Detailed ways
为了使本领域技术人员更好地理解本发明的技术方案,下面结合附图对本申请进行详细描述,本部分的描述仅是示范性和解释性,不应对本申请的保护范围有任何的限制作用。In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present application will be described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory, and shall not have any limiting effect on the protection scope of the present application. .
如图1所示为本申请的第一种实施例的示意图,包括以下步骤:Figure 1 is a schematic diagram of the first embodiment of the present application, which includes the following steps:
S1、制定风险分析目标开关确定原则。S1. Develop risk analysis target switch determination principles.
本步骤具体包括:This step specifically includes:
选择启动开关,根据启动开关确定风险分析目标开关(以下简称目标开关)。Select the start switch and determine the risk analysis target switch (hereinafter referred to as the target switch) based on the start switch.
本实施例中,启动开关由实际开关变位信息或模拟操作产生。In this embodiment, the start switch is generated by actual switch displacement information or simulated operation.
(1)如果启动开关是线路开关,目标开关确定原则为:(1) If the starting switch is a line switch, the target switch determination principle is:
1)如果启动开关对侧开关位置值为0,则对侧开关断开,开始判断自投状态:1) If the position value of the switch on the opposite side of the start switch is 0, the switch on the opposite side is turned off and the self-throwing status is determined:
i.如果自投状态值为0,则线路定义为停电状态,无目标开关,结束;i. If the self-throwing state value is 0, the line is defined as a power outage state, there is no target switch, and it ends;
ii.如果自投状态值为1,则线路定义为备用电源状态,确定目标开关为对侧开关;ii. If the self-throwing state value is 1, the line is defined as the backup power state, and the target switch is determined to be the opposite switch;
2)如果启动开关对侧开关位置值为1,则对侧开关合位,开始判断功率流向:2) If the position value of the switch on the opposite side of the start switch is 1, the switch on the opposite side is closed and the power flow direction begins to be determined:
i.如果启动开关的功率(前一采样值)流向为正(流出),则确定目标开关为对侧开关;i. If the power flow direction of the start switch (previous sampling value) is positive (outflow), then the target switch is determined to be the opposite switch;
ii.如果启动开关的功率(前一采样值)流向为负(流入),则确定目标开关为启动开关。ii. If the power flow direction of the start switch (previous sample value) is negative (inflow), then the target switch is determined to be the start switch.
(2)如果启动开关是母联开关,则将全部线路开关设定为启动开关并依次开始分析,也即按照上述(1)步骤中的1)步骤及2)步骤分析进行。(2) If the starting switch is a bus tie switch, set all line switches as starting switches and start analysis in sequence, that is, follow steps 1) and 2) in step (1) above.
(3)如果启动开关是受总开关,目标开关确定原则为:(3) If the start switch is controlled by the main switch, the target switch determination principle is:
1)如果启动开关为高压受总开关,等效为同时选择主变的中压受总开关和低压受总开关为启动开关;1) If the starting switch is the high-voltage receiving main switch, it is equivalent to selecting the medium-voltage receiving main switch and the low-voltage receiving main switch of the main transformer as the starting switches at the same time;
2)如果启动开关为非高压受总开关,等效为同电压等级线路开关,并将变电站其它同电压等级受总开关类型替换为线路开关,定义其对侧开关运算值为1。2) If the starting switch is a non-high-voltage main switch, it is equivalent to a line switch of the same voltage level. Replace other main switch types of the same voltage level in the substation with line switches and define the operation value of the opposite side switch as 1.
S2、集合形成关于目标开关的关联开关集。S2. Set to form an associated switch set about the target switch.
本步骤具体包括:在开关信息矩阵中筛选与目标开关站名相同的全部开关,并在其中筛选进线开关线路的对侧开关,将以上所有开关构成关联开关集,并对所有开关进线重新编号。This step specifically includes: screening all switches with the same name as the target switch station in the switch information matrix, screening the switches on the opposite side of the incoming switch line, forming an associated switch set with all the above switches, and re-processing all switch incoming lines. serial number.
所述的开关信息矩阵包括全部开关的:站名、类型、开关位置信息、自投状态、有功功率值、负荷区域属性、开关电压等级、开关运行母线、对侧开关编号信息,从SCADA中采集到的以上原始数据构成矩阵A,对以上信息进行数字化处理形成开关信息矩阵B,其中:The switch information matrix includes all switches: station name, type, switch position information, automatic switching status, active power value, load area attributes, switch voltage level, switch operating bus, opposite switch number information, collected from SCADA The above raw data obtained form the matrix A, and the above information is digitally processed to form the switch information matrix B, where:
站名:变电站名称,分别用1-m排序,通过序号代替变电站名称;Station name: substation name, sorted by 1-m respectively, and replace the substation name with the serial number;
类型:设置进线开关、中低压出线开关、变压器高压受总开关、变压器中低压受总开关选项,符合相应类型在矩阵中取值1,反之为0;Type: Set the incoming line switch, medium and low voltage outlet switch, transformer high voltage receiving main switch, transformer medium and low voltage receiving main switch options. If the corresponding type is met, the value will be 1 in the matrix, otherwise it will be 0;
开关位置信息:开关闭合为1,开关断开为0;Switch position information: switch closed is 1, switch open is 0;
自投状态:自投投入为1,自投退出为0;Self-investment status: Self-investment investment is 1, self-investment exit is 0;
有功功率值:流过开关的功率数值P;Active power value: the power value P flowing through the switch;
功率流向值:为了避免空充线路功率采样值误差的影响,设置功率灵敏值P0,当P>P0时,认为功率方向流出,取值为0,反之取值为1;Power flow direction value: In order to avoid the influence of the power sampling value error of the empty charging line, the power sensitivity value P 0 is set. When P > P 0 , the power direction is considered to flow out, and the value is 0, otherwise the value is 1;
进线开关:功率流向值为1的线路开关;Incoming line switch: a line switch with a power flow value of 1;
负荷区域属性:根据供电区域所在的县、区、市对35kV、10kV配网输电线路进行标记,分别以数字1、2、3、……代表其所供负荷在的区域;Load area attributes: Mark the 35kV and 10kV distribution network transmission lines according to the county, district, and city where the power supply area is located, with numbers 1, 2, 3,... representing the areas where the loads they supply are respectively;
开关电压等级:设置220kV,110kV,35kV,10kV选项,符合相应类型在矩阵中取值1,反之为0;Switching voltage level: Set the 220kV, 110kV, 35kV, 10kV options. If the corresponding type is met, the value will be 1 in the matrix, otherwise it will be 0;
开关运行母线:设置代表母线的1、2、3、……编号选项,运行在相应母线上取1,反之为0;母线编号规则为依照母线名称升序排列,最小号对应编号1,甲、乙母线中甲母线对应小的编号;Switch running bus: Set the 1, 2, 3,... number options representing the bus. When running on the corresponding bus, take 1, otherwise it will be 0; the bus numbering rule is to arrange in ascending order according to the bus name, the smallest number corresponds to the number 1, A, B The busbar A in the busbar corresponds to the smaller number;
对侧开关编号信息:类型为“进线开关”的开关线路对侧开关的编号,其他开关对侧编号值取0。Opposite side switch number information: The number of the switch on the opposite side of the switch line with the type "incoming line switch", and the opposite side number value of other switches is 0.
S3、计算目标开关的有效电路径数量。S3. Calculate the number of effective electrical paths of the target switch.
本步骤具体包括:This step specifically includes:
(1) (1)
式中,i表示第i个进线开关,x表示关联开关集中共x个进线开关(包括目标开关);In the formula, i represents the i -th incoming line switch, x represents a total of x incoming line switches in the associated switch set (including the target switch);
对编号为i的进线开关,其开关位置值为,开关闭合时位置值为1,开关断开时位置值为0;For the incoming line switch numbered i , its switch position value is , the position value is 1 when the switch is closed, and the position value is 0 when the switch is open;
对编号为i的进线开关,其开关自投状态值为,自投投入时状态值为1,自投退出时状态值0;For the incoming line switch numbered i , the switch self-turning state value is , the status value is 1 when self-investment is put in, and the status value is 0 when self-investment is exited;
对编号为i的进线开关,其开关运算值为,且/>;For the incoming line switch numbered i , the switch operation value is , and/> ;
为第i个进线开关所在线路的运算值,令其对侧开关编号为j,则/>; is the calculated value of the line where the i- th incoming switch is located, and the number of the switch on the opposite side is j , then/> ;
对编号为i的母线开关,其开关位置值为,开关闭合时位置值为1,开关断开时位置值为0;For the bus switch numbered i , its switch position value is , the position value is 1 when the switch is closed, and the position value is 0 when the switch is open;
对编号为i的母线开关,其开关自投状态值为,自投投入时状态值为1,自投退出时状态值0;For the bus switch numbered i , the switch self-turning state value is , the status value is 1 when self-investment is put in, and the status value is 0 when self-investment is exited;
对编号为i的母线开关,其开关运算值为,且/>;For the bus switch numbered i , its switching operation value is , and/> ;
为母联系数,对于与目标开关运行在相同母线上的进线开关,其母联系数取1,对于与目标开关不运行在相同母线上的开关,其母联系数等于两条母线间的母联/分段开关运算值之积,/>。 is the bus link coefficient. For the incoming switch running on the same bus as the target switch, the bus link coefficient is 1. For the switch not running on the same bus as the target switch, the bus link coefficient is equal to the bus link between the two buses. The product of joint/segment switch operation values,/> .
S4、判断目标开关的风险类型。S4. Determine the risk type of the target switch.
本步骤具体包括:This step specifically includes:
S41、当0<K<K0时,则当前存在N-1停电风险,其中K0的数值设置为1.2~1.5。S41. When 0<K<K 0 , there is currently a risk of N-1 power outage, and the value of K 0 is set to 1.2~1.5.
S42、当K0<K<K1时,则拉开启动开关后,风险目标分析开关所在变电站会出现N-1停电风险,其中K1的数值设置为2.2~2.5。S42. When K 0 <K <K 1 , after pulling the start switch, N-1 power outage risk will occur in the substation where the risk target analysis switch is located, where the value of K 1 is set to 2.2~2.5.
S43、风险类型判断:当存在S41或S42步骤的风险时,若对应电压等级的最小、最大号母线间的母联系数=1,则判定为存在N-1母线全停风险,同时若满足母线电压等级等于该站最高电压等级,则进一步判定为全站停电风险(等效为全部高压母线存在N-1停电风险);若/>=0,则判定为存在N-1母线停电风险。S43. Risk type judgment: When there is a risk in step S41 or S42, if the bus tie coefficient between the minimum and maximum busbars corresponding to the voltage level =1, then it is determined that there is a risk of N-1 bus total outage. At the same time, if the bus voltage level is equal to the highest voltage level of the station, then it is further determined that there is a risk of total station power outage (equivalent to the risk of N-1 power outage for all high-voltage buses) ;if/> =0, it is determined that there is a risk of N-1 bus power outage.
S44、统计本次启动风险分析中同一变电站同电压等级母线N-1停电风险数量n,当n=n0时,则将风险类型修正为N-1母线全停风险,返回步骤S43,其中n0为该电压等级母线数量;将存在N-1停电风险母线的对应编号的低压母线间母联运算值置为0;本步骤中,本次启动风险分析以手动选择启动开关开始,手动消除或自动消除风险预警循环发布为结束。S44. Count the number n of N-1 power outage risks of buses with the same voltage level in the same substation in this startup risk analysis. When n=n 0 , the risk type is corrected to the N-1 bus total outage risk, and return to step S43, where n 0 is the number of voltage level buses; set the bus connection calculation value of the corresponding number of low-voltage buses with N-1 power outage risk buses to 0; in this step, the start-up risk analysis starts with manual selection of the start switch, and manual elimination or The automatic risk elimination warning cycle is released to end.
S45、寻找同电压等级受端变电站风险,如果对目标开关分析判定结果为所在变电站存在N-1停电风险,则选定对应母线上所有功率方向为正的开关作为启动开关,寻找关联开关集,进行有效供电路径计算,且存在N-1风险判据为:K-1<K0。S45. Find risks in receiving substations of the same voltage level. If the analysis and determination result of the target switch indicates that the substation has N-1 power outage risk, then select all switches with positive power direction on the corresponding bus as the start switch and find the associated switch set. Calculate the effective power supply path, and the criterion for the existence of N-1 risks is: K-1<K 0 .
S5、计算负荷损失及负荷损失比例。S5. Calculate load loss and load loss ratio.
本步骤具体包括:This step specifically includes:
S51、以S4步骤得到的风险集合为目标,将高压母线N-1停电风险等效为母线上的高压受总N-1停电,进而等效为对应主变的中、低压侧总受开关N-1停电,此时低压母线的停电风险判据为:K<K0。 S51. Taking the risk set obtained in step S4 as the target, the high-voltage bus N-1 power outage risk is equivalent to the high-voltage receiving total N-1 power outage on the bus, and then equivalent to the medium- and low-voltage side total receiving switches N corresponding to the main transformer. -1 power outage. At this time, the power outage risk criterion of the low-voltage bus is: K<K 0.
S52、以上述S51步骤中存在N-1停电风险的中、低压母线为目标,将母线上全部线路开关设定为启动开关,重复S4步骤,寻找下级风险点。S52. Target the medium and low-voltage buses with N-1 power outage risk in step S51 above, set all line switches on the bus as start switches, and repeat step S4 to find lower-level risk points.
S53、重复S4-S51步骤,直至寻到的母线电压等级为35kV或10kV。S53. Repeat steps S4-S51 until the found bus voltage level is 35kV or 10kV.
S54、负荷损失统计,以遍寻得到的存在停电风险的全部35kV、10kV母线为目标,累加全部出线在目标开关变位或模拟变位前一采样时刻的有功功率值,得到负荷损失大小SΣ。S54, load loss statistics, take all 35kV and 10kV buses that are at risk of power outage as the target, accumulate the active power values of all outlets at the sampling moment before the target switch displacement or simulated displacement, and obtain the load loss size S Σ .
S55、计算负荷损失比例,根据负荷区域属性,分别计算各个地区负荷损失大小S1、S2、S3、……,分别与同一时刻各地区负荷总量作比,得到负荷损失比例S1%、S2%、S3%、……。S55. Calculate the load loss proportion. According to the load area attributes, calculate the load loss sizes S 1 , S 2 , S 3 , ... in each region respectively, and compare them with the total load in each region at the same time to obtain the load loss proportion S 1 % , S 2 %, S 3 %,….
S6、风险定级,发布预警信息。S6. Risk grading and issuing early warning information.
本步骤,所述风险定级,发布预警信息,具体包括:In this step, the risk is graded and early warning information is issued, specifically including:
S61、将N-1风险事件类型与负荷损失及负荷损失比例与风险事件库匹配进行风险定级,生成预警信息;S61. Match the N-1 risk event type with the load loss and load loss ratio with the risk event library to perform risk rating and generate early warning information;
S62、通过D5000系统弹窗发布电网风险预警。S62. Issue power grid risk warning through the D5000 system pop-up window.
本实施例中,D5000系统弹窗中设置人工消除功能,通过人工消除可以结束风险预警循环发布;没有人工消除前,每5分钟重新以既定目标开关为目标进行风险分析和预警,直至电网方式变化使得风险匹配消失,结束预警循环发布。In this embodiment, the manual elimination function is set in the pop-up window of the D5000 system. Manual elimination can end the risk warning cycle issuance; before manual elimination, risk analysis and early warning will be carried out again every 5 minutes with the established target switch as the target until the power grid mode changes. This will make the risk matching disappear and end the warning cycle.
本实施例中所述的风险事件库主要选取《国家电网公司调度系统重大事件汇报规定》中地区电网管辖范围内涉及母线、主变停电及负荷损失的事件类型,包括:The risk event database described in this embodiment mainly selects the types of events involving busbar, main transformer power outage and load loss within the jurisdiction of regional power grids in the "State Grid Corporation Dispatch System Major Event Reporting Regulations", including:
四级电网事件:1)造成区域性电网减供负荷4%以上10%以下者;2)造成直辖市电网减供5%以上20%以下者;3)造成其他设区的市电网减供20%以上者;4)造成电网负荷150兆瓦以上的县级市电网减供负荷40%以上者;5)造成电网负荷150兆瓦以下的县级市电网减供负荷40%以上者;Level 4 power grid incidents: 1) Those that cause the regional power grid to reduce supply load by more than 4% and less than 10%; 2) Those that cause the municipal power grid to reduce supply by more than 5% and less than 20%; 3) Those that cause other districted municipal power grids to reduce supply by 20% Those who are above; 4) Those who cause the county-level city power grid with a power grid load of more than 150 megawatts to reduce the supply load by more than 40%; 5) Those who cause the county-level city power grid with a power grid load of less than 150 megawatts to reduce the supply load by more than 40%;
五级电网事件:1)造成电网减供负荷100兆瓦以上者;2)变电站内220千伏以上任一电压等级母线非计划全停;3)220千伏以上系统中,一次事件造成同一变电站内两台及以上主变跳闸;Level 5 power grid events: 1) Those that cause the power grid to reduce supply load by more than 100 megawatts; 2) Unplanned total shutdown of any voltage level busbar above 220 kV in a substation; 3) In a system above 220 kV, one incident causes the same substation to Two or more main transformers trip inside;
六级电网事件:1)造成电网减供负荷40兆瓦以上100兆瓦以下者;2)变电站内110千伏母线非计划全停;3)一次事件造成同一变电站内两台以上110千伏主变跳闸。Level 6 power grid incidents: 1) Causes power grid supply load reduction of more than 40 MW and less than 100 MW; 2) Unplanned total shutdown of the 110 kV bus in the substation; 3) An incident causes more than two 110 kV mains in the same substation becomes tripped.
本实施例,选择某一开关作为启动开关,通过模拟操作可以自动得到该开关变位引起的电网风险事件,帮助值班调度员对操作任务进行风险分析,有效避免因为电网方式安排不当造成电网风险事件等级升高,值班调度员可以得到实时的电网风险事件预警,有效加强电网风险事件管控和合理规避电网风险。采用开关信息进行分析,避免了传统的潮流或概率潮流计算,减小了运算量,实现快速预警;考虑了上级变电站事故同样对受端变电站带来风险的情况,逐级分析,以35kV和10kV配网输电线路为最终寻找目标,确定电网风险带来的可能负荷损失,充分满足实际调度运行工作中电网风险事件分级的需求。In this embodiment, a certain switch is selected as the start switch, and the power grid risk events caused by the switch displacement can be automatically obtained through simulated operations, helping the on-duty dispatcher to conduct risk analysis on the operation tasks, and effectively avoiding power grid risk events caused by improper arrangement of the power grid. As the level increases, the on-duty dispatcher can get real-time early warning of power grid risk events, effectively strengthen the management and control of power grid risk events and reasonably avoid power grid risks. The switch information is used for analysis, which avoids traditional power flow or probabilistic power flow calculations, reduces the amount of calculation, and achieves rapid early warning; considering that accidents in superior substations also bring risks to the receiving substation, a step-by-step analysis is performed to calculate 35kV and 10kV Distribution network transmission lines are the ultimate goal to determine the possible load losses caused by grid risks and fully meet the needs of grid risk event classification in actual dispatching operations.
如图2所示,为本申请第一种实施例的一具体实例的电网连接示意图,各站35kV、10kV负荷情况:As shown in Figure 2, it is a schematic diagram of the power grid connection of a specific example of the first embodiment of the present application. The 35kV and 10kV load conditions of each station are:
220kV I站:无;220kV I station: none;
220kV II站:无;220kV II station: None;
110kV a站:10kV 4号母线:14MW(区域A负荷);110kV station a: 10kV bus 4: 14MW (area A load);
10kV 5号甲母线:6MW(区域A负荷);10kV No. 5 busbar: 6MW (area A load);
10kV 5号乙母线:10MW(区域A负荷);10kV No. 5 B bus: 10MW (area A load);
10kV 6号母线:8MW(区域A负荷);10kV No. 6 bus: 8MW (area A load);
110kV b站:10kV 4号母线:14MW(区域A负荷);110kV station b: 10kV bus 4: 14MW (area A load);
10kV 5号甲母线:5MW(区域A负荷);10kV No. 5 busbar: 5MW (area A load);
10kV 5号乙母线:7MW(区域A负荷);10kV No. 5 B bus: 7MW (area A load);
110kV c站:10kV 4号母线:8MW(区域B负荷);110kV station c: 10kV bus 4: 8MW (area B load);
10kV 5号母线:6MW(区域B负荷);10kV No. 5 bus: 6MW (area B load);
区域A:县级市,负荷总量131MW;Region A: County-level city, total load 131MW;
区域B:县,负荷总量76MW。Area B: County, total load 76MW.
以下结合此断面进行分析:The following is an analysis based on this section:
(一)模拟:拉开110kV c站111开关(1) Simulation: Open the 111 switch of 110kV station c
1. 选择启动开关111。1. Select start switch 111.
2. 判断111开关功率流向为负(流入母线),确定风险分析目标开关为线路本侧开关,即111开关本身。2. Determine that the power flow direction of the 111 switch is negative (into the bus), and determine that the risk analysis target switch is the switch on this side of the line, that is, the 111 switch itself.
3. 搜索形成关联开关集为:220kV II站121开关,110kV c站111开关、145开关、201开关、202开关及10kV各出线开关(在负荷损失分析环节体现)。3. The associated switch set formed by search is: 121 switch of 220kV station II, 111 switch, 145 switch, 201 switch, 202 switch and 10kV outlet switches of 110kV station c (reflected in the load loss analysis link).
4. 有效供电路径数量计算:4. Calculation of the number of effective power supply paths:
(1)在关联开关集中搜索110kV进线开关,结果为:111开关;在关联开关集中搜索110kV母联(分段)开关,结果为145开关;(1) Search for the 110kV incoming line switch in the associated switch set, and the result is: 111 switch; search for the 110kV bus tie (section) switch in the associated switch set, and the result is 145 switch;
(2)111开关在合位,运算值c1=1,220kV II站121开关在合位,运算值c12=1;因此线路运算值α1=c1·c12=1;有效供电路径数量:。(2) The 111 switch is in the closed position, and the calculated value c 1 =1. The 121 switch of the 220kV II station is in the closed position, and the calculated value c 12 =1; therefore, the line calculated value α 1 =c 1 · c 12 =1; effective power supply path quantity: .
5. 风险类型判定:5. Risk type determination:
由于,且/>,所以当前110kV c站存在N-1全站停电风险,111开关跳闸将直接导致全站失电;because , and/> , so the current 110kV c station has the risk of N-1 station-wide power outage, and the tripping of the 111 switch will directly cause the entire station to lose power;
当前存在N-1停电风险,也即启动开关111跳闸会直接造成设备停电以及损失负荷。There is currently a risk of N-1 power outage, that is, tripping of start switch 111 will directly cause equipment power outage and load loss.
遍寻负荷损失:(1)遍寻N-1故障下35kV、10kV停电母线有:110kV c站10kV 4号、10kV 5号母线;Fanxun load loss: (1) The 35kV and 10kV power outage buses under Fanxun N-1 fault include: 110kV station c, 10kV No. 4 bus, and 10kV No. 5 bus;
(2)负荷损失计算结果:(2) Load loss calculation results:
损失总负荷14MW<100MW,不构成五级电网风险;The total load loss is 14MW<100MW, which does not constitute a Level 5 power grid risk;
区域B损失负荷14MW。Area B lost load 14MW.
风险定级,发布预警弹窗:(1)统计本次风险分析得到的风险等级有:110kV c站110kV母线全停,六级电网风险;Risk grading, issuing early warning pop-up window: (1) The risk levels obtained from this risk analysis are: 110kV station c, 110kV bus is completely stopped, six-level power grid risk;
(2)发布风险预警弹窗:110kV c站111开关断开后,如非计划停电,造成六级电网事件。(2) Issue a risk warning pop-up window: After the 111 switch of 110kV station c is disconnected, an unplanned power outage will cause a level 6 power grid incident.
(二)模拟:拉开220kV I站102开关(2) Simulation: Open the 102 switch of 220kV I station
1. 选择启动开关102。1. Select start switch 102.
2. 判断102非该站高压受总开关,等效为该站110kV母线进线开关。2. It is judged that 102 is not the high-voltage main switch of the station, and is equivalent to the 110kV bus incoming switch of the station.
3. 搜索形成关联开关集为:220kV I站2211、2212、2201、2202、2245、2213、2214、101、102、111、119、120、201、202开关,将101开关类型替换为进线开关。3. Search to form the associated switch set: 2211, 2212, 2201, 2202, 2245, 2213, 2214, 101, 102, 111, 119, 120, 201, 202 switches at 220kV I station, and replace the 101 switch type with the incoming line switch .
4. 有效供电路径数量计算:4. Calculation of the number of effective power supply paths:
(1)在关联开关集中搜索110kV进线开关,结果为:101、102开关;在关联开关集中搜索110kV母联(分段)开关,结果为145甲开关;(1) Search the 110kV incoming line switch in the related switch set, and the result is: 101, 102 switches; search the 110kV bus tie (section) switch in the related switch set, and the result is 145A switch;
(2)101开关在合位,运算值c1=1,对端开关运算值置1,因此线路运算值α1=1;102开关在合位,运算值c2=1,对端开关运算值置1,因此线路运算值α2=1,母联145甲开关合位,母联系数β2=1;有效供电路径数量:。(2) The 101 switch is in the closed position, the operation value c 1 =1, the opposite end switch operation value is set to 1, so the line operation value α 1 =1; the 102 switch is in the closed position, the operation value c 2 =1, the opposite end switch operation The value is set to 1, so the line operation value α 2 =1, the bus link 145 A switch is closed, the bus link coefficient β 2 =1; the number of effective power supply paths: .
5. 风险类型判定:5. Risk type determination:
由于,且/>,所以当前110kV 母线没有N-1停电风险,102开关断开后将产生N-1 110kV母线全停停电风险。because , and/> , so the current 110kV bus does not have the risk of N-1 power outage. After the 102 switch is disconnected, there will be the risk of N-1 110kV bus total power outage.
遍寻负荷损失:(1)遍寻N-1故障下35kV、10kV停电母线有:110kV b站10kV 5号甲、10kV 5号乙、10kV 6号母线;Fanxun load loss: (1) The 35kV and 10kV power outage buses under Fanxun N-1 fault include: 110kV station b, 10kV No. 5A, 10kV No. 5B, and 10kV No. 6 bus;
(2)负荷损失计算结果:(2) Load loss calculation results:
损失总负荷26MW<100MW,不构成五级电网风险;The total load loss is 26MW<100MW, which does not constitute a level five power grid risk;
区域A损失负荷26MW<100MW,占该县级市19.8<40%,不构成四级电网风险。The lost load in Area A is 26MW<100MW, accounting for 19.8<40% of county-level cities, and does not constitute a fourth-level power grid risk.
风险定级,发布预警弹窗:(1)统计本次风险分析得到的风险等级有:220kV I站110kV母线全停,六级级电网风险;220kV II站110kV母线全停,六级级电网风险;110kV b站110kV母线全停,六级级电网风险;(2)发布风险预警弹窗:220kV I站102开关断开后,产生N-1六级电网风险。Risk grading and early warning pop-up windows: (1) The risk levels obtained from this risk analysis are: 220kV station I station has all 110kV buses stopped, a six-level power grid risk; 220kV station II station 110kV buses have all stopped, a six-level power grid risk ; The 110kV bus of 110kV station b is completely stopped, resulting in a six-level power grid risk; (2) A risk warning pop-up window is issued: After the 102 switch of 220kV station I is disconnected, an N-1 level six power grid risk occurs.
(三)模拟:拉开XX电厂站2216开关(3) Simulation: Turn on the 2216 switch of XX power plant station
1. 选择启动开关2216。1. Select start switch 2216.
2. 判断2216开关功率流向为正(流出母线),确定风险分析目标开关为线路对侧开关,即2211开关。2. Determine that the power flow direction of the 2216 switch is positive (out of the bus), and determine that the risk analysis target switch is the switch on the opposite side of the line, that is, the 2211 switch.
3. 搜索形成关联开关集为:220kV I站2211、2212、2201、2202、2245、2213、2214、101、102、111、119、120、201、202开关。3. Search to form the associated switch set: 2211, 2212, 2201, 2202, 2245, 2213, 2214, 101, 102, 111, 119, 120, 201, 202 switches at 220kV I station.
4. 有效供电路径数量计算:4. Calculation of the number of effective power supply paths:
(1)在关联开关集中搜索110kV进线开关,结果为:2211、2212开关;在关联开关集中搜索220kV母联(分段)开关,结果为2245开关。(1) Search for the 110kV incoming line switch in the associated switch set, and the result is: 2211, 2212 switches; search for the 220kV bus coupler (section) switch in the associated switch set, and the result is 2245 switch.
(2)2212开关在合位,运算值c1=1,对端开关2215开关在合位,运算值c12=1,因此线路运算值α1=1;2211开关在合位,运算值c21=1,2216开关在合位,运算值c22=1,因此线路运算值α2=0,母联2245开关合位,母联系数β2=1;有效供电路径数量:。(2) The 2212 switch is in the closed position, and the operation value c 1 =1. The opposite switch 2215 is in the closed position, and the operation value c 12 =1, so the line operation value α 1 =1; the 2211 switch is in the closed position, and the operation value c 21 =1, the 2216 switch is in the closed position, the operation value c 22 =1, so the line operation value α 2 =0, the bus link 2245 switch is in the closed position, the bus link coefficient β 2 =1; the number of effective power supply paths: .
5. 风险类型判定:5. Risk type determination:
(1)由于,且/>,所以220kV I站220kV 母线没有N-1停电风险,XX电厂2216开关断开后将产生N-1 220kV母线全停停电风险;(1) Due to , and/> , so there is no risk of N-1 power outage for the 220kV busbar of 220kV Station I. After the 2216 switch of XX Power Plant is disconnected, there will be a risk of N-1 220kV busbar blackout;
(2)同级风险点寻找结果:XX电厂2216开关断开后,220kV II站同时产生N-1220kV母线全停停电风险。(2) Search results for risk points at the same level: After the 2216 switch of XX Power Plant is disconnected, the 220kV II station also generates the risk of total power outage of the N-1220kV bus.
6. 遍寻负荷损失:6. Search for load loss:
(1)下级风险点寻找结果:(1) Search results for lower-level risk points:
XX电厂2216开关断开后,XX电厂2216开关断开后,220kV I站110kV母线、220kV II站110kV母线、110kV a站110kV 4号、5号、6号母线、110kV b站110kV 4号、 5号、6号母线、110kV c站110kV 4号、 5号母线存在N-1全停风险;After switch 2216 of XX power plant is disconnected, after switch 2216 of XX power plant is disconnected, 220kV station I 110kV busbar, 220kV station II 110kV busbar, 110kV station a 110kV No. 4, 5, and 6 bus, 110kV station b 110kV No. 4, 5 There is an N-1 total shutdown risk for bus No. 4 and No. 6, and 110kV bus No. 4 and No. 5 at station c;
(2)遍寻N-1故障下35kV、10kV停电母线有:(2) The 35kV and 10kV power outage buses under N-1 fault are:
220kV I站10kV 4号、5号母线、220kV II站10kV母线5号、6号母线、110kV a站10kV4号、5号甲、5号乙、6号母线、110kV b站10kV 5号甲、 5号乙、6号母线、110kV c站10kV 4号、5号母线。220kV Station I 10kV bus No. 4, No. 5, 220kV Station II 10kV bus No. 5, No. 6 bus, 110kV Station a 10kV No. 4, No. 5A, No. 5B, No. 6 bus, 110kV Station B 10kV No. 5A, 5 No. B, No. 6 bus, 110kV station c, 10kV No. 4 and No. 5 bus.
(3)负荷损失计算结果:(3) Calculation results of load loss:
损失总负荷88MW<100MW,不构成五级电网风险;The total load lost is 88MW<100MW, which does not constitute a level five power grid risk;
区域A损失负荷64MW,占该县级市总负荷48.9%>40%,构成四级电网风险;Area A lost 64MW of load, accounting for 48.9% > 40% of the county-level city’s total load, posing a fourth-level power grid risk;
区域B损失负荷14MW。Area B lost load 14MW.
7. 风险定级,发布预警弹窗:7. Risk rating and issuing early warning pop-ups:
(1)统计本次风险分析得到的风险等级有:220kV I站220kV母线全停,五级电网风险;220kV II站220kV母线全停,五级电网风险;220kV I站110kV母线全停,六级级电网风险;220kV II站110kV母线全停,六级级电网风险;110kV a站110kV母线全停,六级级电网风险;110kV b站110kV母线全停,六级级电网风险;110kV c站110kV母线全停,六级级电网风险;区域A损失负荷超过40%,四级电网风险;(1) The risk levels obtained from this risk analysis are as follows: 220kV station I station’s 220kV busbar is completely stopped, a level five power grid risk; 220kV station II station’s 220kV busbar is completely stopped, a level five power grid risk; 220kV station I station’s 110kV busbar is completely stopped, a level six power grid risk Level 1 grid risk; 220kV station II, all 110kV buses are stopped, level 6 grid risk; 110kV station a, all 110kV buses are stopped, level 6 grid risk; 110kV station b, 110kV busbar is all stopped, level 6 grid risk; 110kV station c, 110kV If all buses are stopped, the risk will be level 6. The load loss in area A exceeds 40%, which is level 4 risk.
(2)发布风险预警弹窗:XX电厂2216开关断开后,产生N-1四级电网风险。(2) Issue a risk warning pop-up window: After the 2216 switch of XX Power Plant is disconnected, N-1 level four power grid risk will occur.
本文中应用了具体个例对本申请的原理及实施方式进行了阐述,以上实例的说明只是用于帮助理解本申请的方法及其核心思想。以上所述仅是本申请的优选实施方式,应当指出,由于文字表达的有限性,而客观上存在无限的具体结构,对于本技术领域的普通技术人员来说,在不脱离本申请原理的前提下,还可以做出若干改进、润饰或变化,也可以将上述技术特征以适当的方式进行组合;这些改进润饰、变化或组合,或未经改进将申请的构思和技术方案直接应用于其它场合的,均应视为本申请的保护范围。This article uses specific examples to illustrate the principles and implementation methods of the present application. The description of the above examples is only used to help understand the method and the core idea of the present application. The above are only preferred embodiments of the present application. It should be pointed out that due to the limitations of written expressions, there are objectively unlimited specific structures. For those of ordinary skill in the art, without departing from the principles of the present application, Under the circumstances, several improvements, modifications or changes can also be made, or the above technical features can be combined in an appropriate manner; these improvements, modifications or combinations, or the applied concepts and technical solutions can be directly applied to other situations without improvement. , shall be regarded as the protection scope of this application.
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