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    • 1. 发明专利
    • Device and method for stabilizing system
    • 用于稳定系统的装置和方法
    • JP2011041354A
    • 2011-02-24
    • JP2009184133
    • 2009-08-07
    • Chubu Electric Power Co IncHitachi Ltd中部電力株式会社株式会社日立製作所
    • SEKOGUCHI MASAHIROFUKUI CHIHIROKUROSAWA KOICHICHO KENSUZUKI KOJIHIRANO DAIGOSHIMOMURA KIMIHIKO
    • H02J3/24H02J3/00H02J3/16
    • Y02E40/34
    • PROBLEM TO BE SOLVED: To solve a phase angle stability problem and a voltage problem since a bus voltage of a substation over-rises due to a fluctuation of a phase angle inside a generator by a disturbance of the generator and a large fluctuation of a power line stream if power limit control is performed when a system breaks down although a large amount of power capacitors are used for maintaining a bus voltage of the substation at stationary time in the power system transmitting a power from a large capacity power supply at a remote place. SOLUTION: A system stabilizing device is provided with database storing data obtained by previously calculating a power control amount at the power station at an assumed accident and a phase modification control amount at the substation operating/interrupting a phase modification facility by using an electric circuit model of the electric system and online data. The device is provided with a restoration/confirmation means for a reduction gradient of phase angle fluctuation of the generator and a substation bus voltage at the system accident by a previous operation. When fault information of the system is received, phase modification control is performed based on the substation phase modulation control amount corresponding to the fault which is read from the database and data on its execution timing. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:为了解决由于发电机的干扰引起的发电机内相位角的波动,变电站的母线电压的波动过大以及波动大的问题, 如果在系统故障时执行功率限制控制,则在电力系统中从大容量电源传输电力的情况下,在大量电力系统中使用大量的功率电容器来维持变电站的总线电压在静止时间, 一个偏远的地方。 解决方案:系统稳定装置具有数据库存储数据,所述数据库存储数据是通过预先计算假设事故时在发电站处的功率控制量和变电站的相位修改控制量而操作/中断相位修改设备而获得的, 电气系统电路模型和在线数据。 该装置具有恢复/确认装置,用于通过先前的操作在系统事故期间发生发电机的相位角波动的减小梯度和变电站总线电压。 当接收到系统的故障信息时,根据与从数据库读取的故障对应的变电站相位调制控制量及其执行定时数据,进行相位修正控制。 版权所有(C)2011,JPO&INPIT
    • 2. 发明专利
    • Stability calculation method by system search and generator phase angle determination
    • 系统搜索和发电机相位角测量的稳定性计算方法
    • JP2011015564A
    • 2011-01-20
    • JP2009158419
    • 2009-07-03
    • Hitachi Ltd株式会社日立製作所
    • CHO KENKAWAHARA TAIICHIROTANITSU MASAHIRO
    • H02J3/00G06Q50/00G06Q50/06H02J3/24
    • Y04S10/54
    • PROBLEM TO BE SOLVED: To provide a stability calculation method wherein the main system and the separation system of a power system are determined correctly, and the calculation can be continued simultaneously even when a plurality of separation systems exist.SOLUTION: The main system and the separation system of a power system are recognized based on the system search method and the generator phase angle determination method, and calculation is performed simultaneously for respective systems even when the plurality of separation systems exist. Consequently, a generator in the system state that cannot exist can be excluded, and the stability calculation can be carried out continuously. Furthermore, the system can be determined correctly including the DC interconnection, and the stability can be calculated.
    • 要解决的问题:提供一种稳定性计算方法,其中电力系统的主系统和分离系统被正确地确定,并且即使存在多个分离系统也可以同时继续计算。解决方案:主系统和 基于系统搜索方法和发电机相位角确定方法识别电力系统的分离系统,并且即使存在多个分离系统,也针对各个系统同时进行计算。 因此,可以排除不能存在的系统状态的发电机,并且可以连续进行稳定性计算。 此外,可以正确地确定系统,包括DC互连,并且可以计算稳定性。