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    • 1. 发明授权
    • Digital protective relaying systems
    • 数字保护中继系统
    • US4371908A
    • 1983-02-01
    • US345356
    • 1982-02-03
    • Fumio AndowTakayuki KobayashiRyotaro KondowYoshiji Nii
    • Fumio AndowTakayuki KobayashiRyotaro KondowYoshiji Nii
    • H02H3/30H02H7/26
    • H02H3/30H02H7/261
    • In a digital protective relaying device for protecting electric power transmission line including an electric station at each end thereof, and each electric station including at least one circuit breaker to be tripped by a protective relay for protecting the own station, a digital protective relay provided with a computer is further provided at each end so as to receive electrical data in digital form from the electric stations for operating in an ordinary protective operation. As a control condition occurs in one station, the condition is sent to a digital protective relay provided at the other end of the transmission line, thereby changing the operational steps of the computer included in the protective relay.
    • 在一种数字保护继电装置中,用于保护在其每一端包括电站的电力输电线,并且每个电站包括至少一个断路器,以便由用于保护本站的保护继电器跳闸;数字保护继电器, 在每一端进一步设置计算机,以便从电站接收数字形式的电子数据,以便在普通的保护操作中操作。 由于在一个站中发生控制状况,因此将该条件发送到在传输线的另一端提供的数字保护继电器,从而改变保护继电器中包括的计算机的操作步骤。
    • 2. 发明授权
    • Protective relay system
    • 保护继电器系统
    • US4541058A
    • 1985-09-10
    • US419473
    • 1982-09-17
    • Fumio AndowMitsuru YamauraRyotaro Kondow
    • Fumio AndowMitsuru YamauraRyotaro Kondow
    • H02H3/40G01R19/00H02H3/26
    • H02H3/40Y10T307/832
    • A protective relay system for protecting a power system includes a selection circuit, a comparing circuit, and a data processing unit. The selection circuit time-sequentially switches a plurality of input signals having electrical quantities from the power system under control of the data processing unit and applies the input signals to the comparing circuit. The comparing circuit applies to the data processing unit a discriminated output signal representing the result of the comparing of a level of a signal having an electrical quantity and obtained from the input signals to the comparing circuit with a reference level. At a time point upon lapse of a time corresponding to an electrical angle of 90.degree. of the input signal, for example, after the logical level of a first discriminated output signal corresponding to a first controlled state of the selection circuit has been changed, the comparing circuit produces a second discriminated output signal corresponding to a second controlled state of the selection circuit different from the first controlled state. The data processing unit determines the level of a protection output signal according to a logical level of the second discriminated output signal.
    • 用于保护电力系统的保护继电器系统包括选择电路,比较电路和数据处理单元。 选择电路在数据处理单元的控制下时间顺序地切换具有来自电力系统的电量的多个输入信号,并将输入信号施加到比较电路。 比较电路向数据处理单元应用表示将具有电量并且从输入信号获得的信号的电平与比较电路的电平与参考电平进行比较的判别输出信号。 例如,在与输入信号的电角度90度相对应的时间点的时间点,在对应于选择电路的第一受控状态的第一鉴别输出信号的逻辑电平已经改变之后, 比较电路产生对应于不同于第一受控状态的选择电路的第二受控状态的第二鉴别输出信号。 数据处理单元根据第二判别输出信号的逻辑电平来确定保护输出信号的电平。
    • 9. 发明授权
    • Digital distance relays
    • 数字距离继电器
    • US4357666A
    • 1982-11-02
    • US130526
    • 1980-03-14
    • Tetsuo MatsushimaRyotaro KondowKunio Matsuzawa
    • Tetsuo MatsushimaRyotaro KondowKunio Matsuzawa
    • H02H3/40H02H3/42G06F15/20
    • H02H3/40
    • In a digital distance relay including sample-hold circuits for sampling the voltage and current of an electric power line system, analog-digital converters for converting the outputs of the sample-hold circuits into digital values, memory devices for memorizing the digital values and a program, and a central processing unit for exercising a relaying operation, there is provided a central processing unit which includes means for determining whether at least one of the digital values is greater than a predetermined value. The relaying operation of the distance relay is initiated only when the one digital value is greater than the predetermined value. A method is disclosed which includes the above determining step.
    • 在包括用于对电力线系统的电压和电流进行采样的采样保持电路的数字距离继电器中,用于将采样保持电路的输出转换为数字值的模数转换器,用于存储数字值的存储器件和 程序和用于执行中继操作的中央处理单元,提供了一种中央处理单元,其包括用于确定数字值中的至少一个是否大于预定值的装置。 距离继电器的中继操作仅在一个数字值大于预定值时启动。 公开了一种包括上述确定步骤的方法。