Title:
DEVICE FOR EVALUATING DEGREE OF VOLTAGE STABILITY FOR POWER SYSTEM AND RECORDING MEDIUM RECORDED WITH ITS PROGRAM
Document Type and Number:
Japanese Patent JPH1132433
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To show the stable receiving state of a load more accurately and to easily obtain the index of the degree of the voltage stability of a power system. SOLUTION: This device is constituted in such a way as to collect the connection state and power supply-and-demand state of a power system as system information and to evaluate and monitor the voltage stability of the power system, based on these collected on-line data. In this case, an evaluating means 6 is provided. With this means 6, the present power flow state of the system is calculated (2), based on the collected system information and the system facility data. The degree of voltage stability of the system under that state is calculated as an index using the scale of equilibrium force. Also, expected supply-and-demand state, the change of the system structure and the system state in an accidental failure are calculated (5). Then, the degree of voltage stability under that sate is evaluated as an index, using the scale of the equilibrium force as in the preceding case.
Inventors:
YAMAMOTO MASAHITO
Application Number:
JP19779597A
Publication Date:
February 02, 1999
Filing Date:
July 08, 1997
Export Citation:
Assignee:
TOKYO ELECTRIC POWER CO
International Classes:
H02J3/00; (IPC1-7): H02J3/00
Attorney, Agent or Firm:
Norio Ishii
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