CN104901328B - Automatic recognition based multiport flexible linear control mode complex control network - Google Patents

Automatic recognition based multiport flexible linear control mode complex control network Download PDF

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CN104901328B
CN104901328B CN201510262519.1A CN201510262519A CN104901328B CN 104901328 B CN104901328 B CN 104901328B CN 201510262519 A CN201510262519 A CN 201510262519A CN 104901328 B CN104901328 B CN 104901328B
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system
multi
flexible
network
topology
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CN104901328A (en
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陈莉
朱喆
操丰梅
杨柳
张海棠
李巍巍
马小虎
罗雨
许树楷
黎小林
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北京四方继保自动化股份有限公司
中国南方电网有限责任公司
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/60Arrangements for transfer of electric power between AC networks via a high-tension DC link, HVDC transmission

Abstract

一种基于复杂控制网络下的多端柔直控制模式自动识别方法,根据的PMU提供的电网多点多维度信息,基于面向对象技术构建多端柔直系统网络拓扑模型,采用先进的快速索引拓扑跟踪方法和统计分析理论,对全网或局部进行拓扑跟踪。 An automatic identification method based multiport flexible linear control mode complex control networks, in accordance with the PMU to provide a multi-point multi-dimensional grid information, based alignment system constructed multiport flexible network topology model object-oriented technology, advanced tracking method for rapid indexing topology and statistical analysis theory, the whole network topology or partial track. 当多端柔直系统支路状态发生变化时,该方法通过对系统内的开关状态、节点电压以及各支路电流等电气量之间的相似性差异进行分析,快速的跟踪和识别网络状态变化,调整多端柔直系统的运行方式。 When the multi-terminal system flexible leg straight state changes, the state of the process by switching within the system, similarities and differences between the node voltage electrical current, the amount of each branch analysis, a fast track and identify changes in network status, multiport flexible linear adjustment mode operation of the system. 同时能为多端柔直控制系统提供电网拓扑结构参数信息,换流站控制系统根据该参数信息,进行潮流计算和故障分析,为换流站的稳态控制提供基础数据。 While providing flexibility to multi-terminal direct control grid topology of the system parameter information, the control system of the converter station based on the parameter information, and fault analysis flow calculation, provide basic data for steady-state control of the converter station.

Description

基于复杂控制网络下的多端柔直控制模式自动识别方法 Automatic recognition based multiport flexible linear control mode complex control network

技术领域 FIELD

[0001]本发明属于直流输电控制技术领域,具体涉及一种基于复杂控制网络(即多端柔直的主接线网络)下的柔直控制模式自动识别技术,该技术能够根据直流系统网络拓扑结构确定多端柔直系统的运行方式,并能够对快速识别网络状态的变化,自动调整柔直系统的运行方式。 [0001] The present invention belongs to the technical field control DC transmission, in particular to a soft linear control mode based on complex control network (i.e., soft straight main wiring multiport network) in the automatic identification technology, which can be determined according to the network topology DC system multiport flexible linear operating mode of the system, and can quickly identify changes in the network state automatically adjusting the operating mode flexible linear system. 提高柔直系统运行的经济性和稳定性。 Improve the economy and the stability of the system is running straight soft. ' '

背景技术 Background technique

[0002]柔性直流输电具有独立控制有功功率和无功功率,并且在潮流反转时能够保持直流电压极性不变,直流电流方向反转的特点。 [0002] The flexible HVDC having independent control of active and reactive power and current when the DC voltage polarity inversion can be kept constant, the DC current direction reversing features. 柔直换流站对于直流侧相当于电流源,十分有利于构成并联多端直流输电系统。 Converter station for soft direct current side corresponds to the current source, is very conducive to a parallel system with multi-terminal DC transmission. 由于柔直系统的控制特点,决定了多端柔直系统可以有多种运行方式。 Since the control system of the linear characteristic soft, flexible multi-terminal determines the alignment system can run a variety of ways. 多端直流系统运行方式与功率传输方向和直流系统的控制方式有关,同时与直流系统接线方式也有非常重要的关系。 Multiterminal DC system operation and control system and DC power transmission direction concerned, while the DC wiring system has a very important relationship. 当直流系统接线方式发生变化的情况下,如果不及时调整柔直系统的运行方式,就会对柔直系统的稳定运行造成影响。 In the case where the DC system is changed wiring, are not adjusted if the flexible linear operating mode of the system, it will affect the stable operation of the flexible linear system. 所以多端柔性直流输电系统能够根据系统网络拓扑关系,选择合理的运行方式,对多端柔性直流输电系统的稳定运行至关重要。 Therefore, the flexible multi-terminal DC transmission system capable of network topology system according to select a proper operation mode, stable operation is critical to the flexible multi-terminal DC transmission system.

[0003]综合上述内容,本发明提出一种基于复杂控制网络下的多端柔直控制模式自动识别技术,该技术能够根据交流系统和直流系统的开关状态,进行柔直系统网络拓扑分析,实时有效的跟踪和识别电网的运行状态变化。 [0003] SUMMARY In summary, the present invention proposes a soft linear control mode based on automatic identification technology in complex multi-terminal control network, according to the technology can switch the state of the AC system and DC systems, network topology analysis flexible linear system, real-time effective changes in operating status tracking and identification of the grid. 为柔直系统的稳态计算、潮流方向判别、运行模式判断和故障分析等提供电网拓扑结构参数信息。 Computing a linear steady-state flexible system, flow direction determination, and failure analysis operating mode is determined to provide the grid topology information parameter. 多端柔性直流控制系统根据该参数信息,确定多端柔性直流输电系统的运行方式,协调柔直系统内部各换流站运行,满足柔直输电系统控制要求。 Flexible multi-terminal DC control system based on the parameter information determining the operating mode of the flexible multi-terminal DC transmission system, the internal coordinate system of each flexible linear converter station operating, direct transmission system control to meet compliance requirements.

发明内容 SUMMARY

[0004]为解决现有技术中存在的以上问题,本发明公开了一种多端柔性直流输电系统级协调控制装置。 [0004] In order to solve the above problems present in the prior art, the present invention discloses a flexible multi-terminal DC transmission system level coordination control means. 实现多端柔性直流输电系统的协调控制。 Coordinated control to achieve multi-terminal HVDC flexible system.

[0005]本发明具体采用以下技术方案: [0005] The present invention particularly adopts the following technical scheme:

[0006] —种基于复杂控制网络下的多端柔直控制模式自动识别方法,其特征在于:所述方法根据直流系统网络拓扑结构确定多端柔直系统的运行方式,快速识别直流系统网络状态的变化,自动调整柔直系统的运行方式,保障多端柔直系统的稳定运行。 [0006] - Direct control of soft-mode Automatic Recognition based multiport under complex control networks, characterized in that: the method according to the DC system determines network topology multiport flexible linear mode operation of the system changes, the DC system to quickly identify the status of the network automatically adjust the system to run soft straight way to protect the multiport soft straight and stable operation of the system.

[0007] 一种基于复杂控制网络下的多端柔直控制模式自动识别方法,其特征在于,所述识别方法包括以下步骤: [0007] A soft linear control mode based on automatic identification in complex multi-terminal control network, wherein, said recognition method comprising the steps of:

[0008] 步骤1:通过相量测量单元PMU采集多端柔性直流输电系统网络的多点多维度信息,包括断路器、刀闸、变压器、换流器、母线和线路状态信息和多端柔性直流输电系统网络运行参数;其中,多点是指系统内多个数据采集节点,即为所有设备的状态点和线路测量点。 [0008] Step 1: phasor measurement unit PMU collection multiport flexible multi-point multi-dimensional information HVDC network, including circuit breakers, disconnectors, transformers, inverters, bus and line status information, and the flexible multi-terminal DC transmission system network operating parameter; wherein a plurality of multi-point refers to the system of data collection nodes, the status point is the measurement point and all line devices. 维度是根据系统结构定义的,直流系统网络中不同层次和区域的的设备可划分到不同的维度范围。 Dimension is, the DC system and different levels of network devices can be divided into regions of different dimensions defined range depending on the system configuration.

[0009] 步骤2:基于面向对象技术将具有相同操作特性的设备,划分到同一设备组内;将多状态设备映射为多节点,每个节点的父对象都为此设备对象,将多端柔性直流输电系统网络内的设备连接抽象为连接电缆节点和连接关系,每种设备的电气属性都抽象为节点属性和连接关系属性,由设备模型构建成换流站模型,再由换流站模型组成多端柔性直流输电系统网络拓扑模型; [0009] Step 2: Object-oriented technology-based device having the same operating characteristics, divided into the same device group; a multi-state multi-device mapping node, each node's parent object for this device, the flexible multi-terminal DC devices within the transmission system connected to a network is abstracted as node connection cable and connection relationship, the electrical attributes of each device are abstracted as node attributes and connection relationship properties, constructed by the device model to model converter station, then the converter station model composition multiport HVDC flexible network topology model;

[0010] 步骤3:根据步骤2生成的多端柔性直流输电系统网络拓扑模型,采用广度优先搜索策略对所述网络拓扑模型进行遍历,同时完成支路类型的识别和网络分区;通过快速索引拓扑跟踪方法对多端柔性直流输电系统网络状态(网络状态是指多端系统的拓扑结构) 进行实时跟踪,根据直流系统网络的拓扑结构的变化改变多端柔性直流输电系统的运行方式。 [0010] Step 3: The step flexible multi-terminal DC transmission system generated network topology model 2, breadth-first search strategy to traverse the network topology model, while the completion of the branch type identification and network partition; topology by flash tracking index a method for multi-terminal HVDC flexible system network state (state refers to a network topology of the multi-terminal system) for real-time tracking, in accordance with changes in the topology of the network changes multiterminal DC system operating mode flexible HVDC system.

[0011] 所述基于复杂控制网络下的多端柔直控制模式自动识别方法能够为多端柔直控制系统提供电网拓扑结构参数信息。 [0011] The flexible linear control mode based on automatic identification in complex multi-terminal control method capable of direct network control system topology parameters provide soft multi-terminal network information. 多端柔性直流控制系统根据该参数信息,进行潮流计算和故障分析,为换流站的稳态控制提供基础数据。 Flexible multi-terminal DC control system based on the parameter information, and fault analysis flow calculation, provide basic data for steady-state control of the converter station.

[0012] 所述基于复杂控制网络下的多端柔直控制模式自动识别方法采用快速索引拓扑跟踪方法,在对多端柔直系统初始网络结构进行静态遍历的同时,完成各个换流站运行方式的判断和网络结构划分。 [0012] The flexible linear control mode based on automatic identification in complex multi-terminal method using rapid indexing control network topology tracking method, while the initial network structure multiport flexible linear traversing static system, each converter station operation completion judgment flow mode and the network structure is divided. 当多端柔直系统网络支路状态发生变化时,该方法采用快速索引搜索规则对网络拓扑进行更新,并根据新的拓扑结构生成多端柔直系统的运行方式。 When the flexible multi-terminal network bypass alignment system state changes, the index search method using fast network topology update rule, and a new operating mode topology generation system according to a linear multiport flexible.

附图说明 BRIEF DESCRIPTION

[0013] 图1为多端柔直系统换流站模型; [0013] FIG. 1 is a multiport flexible linear system model converter station;

[0014] 图2为多端柔直系统换流站拓扑模型; [0014] FIG. 2 is a flexible multi-terminal direct converter station system topology model;

[0015] 图3基于复杂控制网络下的多端柔直控制模式自动识别方法的流程示意图。 [0015] FIG. 3 is a schematic flowchart of automatic identification method based multiport flexible linear control mode under control of complex networks.

具体实施方式 Detailed ways

[0016] 下面结合说明附图对本发明的技术方案作进一步详细说明。 [0016] conjunction with the accompanying drawings will be described further detailed description of the technical solution of the present invention.

[0017] 如图1所示为多端柔性系统换流站模型。 [0017] The converter station 1 multiport flexible model system. 多端柔直控制模式自动识别技术把换流站模型等效成一组由若干相互关联的设备和设备之间的连接线组成的设备集合,包括断路器、刀闸、变压器、换流器、母线和线路等。 Multiport flexible linear control mode automatic recognition model is equivalent to the converter station to a group set by the connecting lines between the devices a plurality of interconnected devices and equipment components, including circuit breakers, disconnectors, transformers, inverters, and bus bars lines. 参照IEC61970标准,给出换流站模型。 Referring IEC61970 standard, given converter station model. 根据换流站模型为一组相互关联设备的集合,在划分换流站时将每个换流站相互关联的设备划分到一起,同时要考虑设备的特性,将具有相同设备特性的设备,划分到同一设备组内。 The converter station model is a collection of interconnected devices, when dividing devices into the converter station each converter stations interconnected together, taking into account the characteristics of the device, the device having the same device characteristic, divided to the same device group. 将多状态设备映射为多节点,每个节点的父对象都为此设备对象,将设备连接抽象为连接电缆节点和连接关系,每种设备的电气属性都抽象为节点和关系的属性。 The multi-state devices mapped to multiple nodes, each node's parent device object, the device is connected to the connecting cable for this abstract node and connection relationship, the electrical attributes of each device are abstracted as node attributes and relationships. 考虑到分析过程的复杂程序,每个换流站内的设备不能过多,否则会导致可能存在的状态过多。 Given the complexity of program analysis process, each commutation equipment inside the station can not be too much, otherwise it will lead to too many possible states. 换流站模型建立后, 再由换流站模型组成多端柔性直流输电系统地网络模型,并将网络的拓扑信息入库后,作为多端柔性直流系统运行模式查询、分析和判断的基础参考数据。 After establishing model converter station, then the converter station model consisting multiport flexible HVDC system area network model, the network topology information and storage, as multiterminal DC system queries a flexible mode of operation, the reference data base analysis and judgment.

[0018] 如图2所示为多端柔性系统换流站拓扑模型。 [0018] shown as a flexible multi-terminal system topology model converter station 2. 多端柔直控制模式自动识别技术将多端柔直系统通过换流站模型的各端点相互连接成为连接节点,通过拓扑分析组成拓扑节点,拓扑节点通过线路相互连接把换流站接到一起形成拓扑岛。 Multiport flexible linear control mode to automatic identification technology systems are connected by a straight multiport flexible endpoints converter station be connected to each other model nodes interconnected by node topology analysis composition topology, the line topology node to form a topology of the converter station with island . 首先是多端柔直系统的结线分析,其功能是分析端柔直系统的直流线路由闭合断路器连接成多少拓扑节点,多端柔直系统结线分析的结果是将每个换流站划分为若干个拓扑节点,也可以称为节点分析。 First, a straight flexible connectivity analysis multiterminal system, whose function is to direct the line side flexible linear analysis system connected by closing the circuit breaker to be much topological node, multi-terminal direct result flexible connectivity analysis system is to be divided into each converter station a plurality of topological nodes, the node may also be referred analysis. 分析换流站的连接节点,将这些端点划分成连接的支路。 Analysis of the converter station connected to the nodes, these endpoints into a branch connection. 其次是多端柔直系统网络拓扑分析, 任务是分析整个系统的拓扑节点由支路连接成多少拓扑岛。 Followed by multiport flexible linear system network topology analysis task is to analyze the overall system topology of nodes connected by branches into many island topology. 分析结果是将有电气联系的拓扑节点划分到一个拓扑岛中,通过分析多拓扑岛中换流站的连接状态,并且和换流站模型分析中保存的换流站运行状态进行比较,从而得到换流站合法运行方式。 Analysis is a topological nodes electrical contact is divided into a topology island, and and converter station Model stored in the converter station operating status by comparing the analysis of the connection state of multi-topology island converter station, to obtain converter station legitimate operation mode. 该方法将一个复杂的大型网络分解为一个个换流站,对每个换流站进行分析,然后将这些换流站通过特定的连接单元〈线路)连接在一起,从而完成整个复杂网络的分析,通过拓扑分析能够快速准确的确定多端柔直系统的运行方式,确保柔直系统安全稳定的运行。 The method a large, complex network is decomposed into a converter stations, analysis of each converter station, then the converter station which are connected together by connection means specific <line), thereby completing the complex analysis of the entire network by topological analysis can quickly and accurately determine the operating mode soft straight multiport system to ensure compliance straightening system safe and stable operation.

[0019]如图3所示为基于复杂控制网络下的多端柔直控制模式自动识别方法的流程示意图,本发明公开的基于复杂控制网络下的多端柔直控制模式自动识别方法包括以下步骤: [0020] 步骤1:模式识别算法首先对换流站模拟内所有的设备状态进行分析,采用广度优先搜索方法,对多端柔性直流输电系统网络内的所有设备进行搜索查询,建立所有设备对象的电气属性连接关系,并完成支路类型的识别和网络分区。 [0019] FIG. 3 is a schematic flow chart of the control mode based on the linear compliance in complex multi-terminal network controlled automatic identification method, the present invention discloses soft linear control mode based on automatic identification in complex multi-terminal network controlling method comprising the steps of: [ 0020] step 1: pattern recognition algorithm is first of all the device status station analog converter is analyzed, breadth-first search method, for all devices in the multi-terminal HVDC flexible system network search query, to establish the electrical properties of all equipment objects connection relationship, and the completion of the branch and identifying the type of network partition. 生成原始换流站模型和多端柔性直流输电系统网络模型。 Generating the original model converter station and the flexible multi-terminal HVDC network model. 确定多端柔性直流输电系统中各个换流站初始的控制模式。 Determining the control mode of the flexible multi-terminal HVDC converter station in each of the original. [0021]步骤2:根据各种设备故障对柔直系统运行方式影响的分析,结合网络拓扑矩阵, 得到各种故障对系统的影响及所需进行的运行方式操作,进行参数信息存储,供后续分析查询和参考。 [0021] Step 2: The Influence of various equipment failure operation mode flexible linear system, the network topology binding matrix, to obtain the effect of various system faults and operating mode required for the operation parameter information is stored for subsequent query and analysis reference.

[0022]步骤3:模式识别算法定时检测多端柔性直流输电系统内节点状态的变化,当检测到多端柔性直流输电系统内节点状态发生变化后,根据网络结构的变化,和步骤2中生成的存储信息进行比对,选择满足条件的参数信息生成新的运行方式,并更新换流站模型和多端柔性直流输电系统网络模型。 3 [0022] Step: changes in the flexible HVDC node status pattern recognition algorithm timing detection multiterminal, when the detected multiport the node status change within a flexible HVDC system, according to changes in network configuration, step 2 generated in memory comparison information, parameter information satisfying a condition of generating a new operating mode, and update the model converter station and the flexible multi-terminal HVDC network model.

[0023]本文利用节点类和支路类的双向关联关系,基于广度优先搜索策略对初始网络拓扑进行了遍历,并同时实现了支路类型的识别和网络分区。 [0023] In this paper, two-way relationship branch node classes and classes, breadth-first search strategy based on the initial traverse the network topology, while achieving the identification of the type and branch network partition. 根据各种设备故障对柔直系统运行方式影响的分析,结合网络拓扑矩阵,得到各种故障对系统的影响及所需进行的运行方式操作,进行参数信息存储供后续分析查询和参考。 The analysis of the influence of various equipment failure operation mode flexible linear system, the network topology binding matrix, to obtain the various impact failure mode operation of the system and are necessary for operation, parameter information is stored for subsequent query analysis and reference. 模式识别通过快速索引拓扑跟踪方法对柔直系统网络内的设备状态进行快速搜索跟踪,采用对网络进行抽象和简化的手段, 结合网络故障情况,实现了网络的拓扑跟踪,对设备故障后由于网络结构变化对多段柔直系统运行方式的影响进行判断,及时调整柔直换流站控制模式。 Pattern recognition by flash indexing topology Tracking device status in the flexible linear system network quick search track, using the means of network abstraction and simplified, binding of a network failure, to achieve a topological network trace, after equipment failure due to network Effect of structural changes on the flexible linear multistage system operating mode is determined, to adjust the soft linear control mode converter station. 该方法可应用于任意复杂结构的独立柔直配电网络,能够满足多端柔直系统运行管理的需要,对于提高多端柔直系统的运行水平有较好的理论意义和实用价值。 This method can be applied to any independent soft straight distribution network complex structure, able to meet the needs of multi-terminal operation and management of soft alignment system has good theoretical and practical value for improving the level of soft straight multi-terminal operation system.

Claims (1)

1. 一种基于复杂控制网络下的多端柔直控制模式自动识别方法,其特征在于,所述识别方法包括以下步骤: 步骤1:通过相量测量单元PMU采集多端柔性直流输电系统网络的多点多维度信息,包括断路器、刀闸、变压器、换流器、母线和线路状态信息和多端柔性直流输电系统网络运行参数;其中,多点是指多端柔性直流输电系统内多个数据采集节点; 步骤2:基于面向对象技术将具有相同操作特性的设备划分到同一设备组内;将多状态设备映射为多节点,每个节点的父对象都为此设备对象,将多端柔性直流输电系统网络内的设备连接抽象为连接电缆节点和连接关系,每种设备的电气属性都抽象为节点属性和连接关系属性,由设备模型构建成换流站模型,再由换流站模型组成多端柔性直流输电系统网络拓扑模型;根据各种设备故障对柔直系统运行方式影响的 An automatic method for identifying multiterminal soft linear control mode complex control based network, wherein, said recognition method comprising the following steps: Step 1: phasor measurement unit PMU collection multiterminal HVDC flexible multipoint system network multi-dimensional information, including circuit breakers, disconnectors, transformers, inverters, bus and line status information, and the flexible multi-terminal DC transmission system network operating parameter; wherein a plurality of multi-point refers to the data in the flexible multi-terminal HVDC collection node; step 2: based on object-oriented technology devices into operation will have the same characteristics into the same device group; a multi-state multi-device mapping node, each node's parent object for this apparatus, the inner flexible multi-terminal DC transmission system network abstract device connection node connecting cable and connection relationship, the electrical attributes of each device are abstracted as node attributes and connection relationship properties, constructed by the device model to model converter station, then the converter station model system consisting of flexible HVDC multiterminal network topology model; Effect on flexible linear operating mode system in accordance with various equipment failure 析,结合网络拓扑矩阵,得到各种故障对系统的影响及所需进行的运行方式操作,进行参数信息存储,供后续分析查询和参考; 步骤3:根据步骤2生成的多端柔性直流输电系统网络拓扑模型,采用广度优先搜索策略对所述网络拓扑模型进行遍历,同时完成支路类型的识别和网络分区;通过快速索引拓扑跟踪方法对多端柔性直流输电系统网络状态即多端柔性直流输电系统的拓扑结构进行实时跟踪,根据多端柔性直流输电系统的拓扑结构的变化改变多端柔性直流输电系统的运行方式。 Analysis, in conjunction with the network topology matrix obtained on the effect of various system faults and operating mode required for the operation parameter information is stored, and a reference for subsequent query analysis; Step 3: The step of generating the multi-terminal DC transmission system flexible network 2 topology model, breadth-first search strategy to traverse the network topology model, while the completion of the branch type identification and network partition; topology by flash index tracking method for a flexible multi-terminal HVDC multiterminal network topology state, that is flexible HVDC system real-time tracking structure, according to a change in the topology of the multi-terminal HVDC flexible system operation mode change multiport flexible HVDC system.
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