Power system stabilization system and method employing a rechargeable battery system
AssigneesSumitomo Electric Industries, Ltd., The Kansai Electric Power Co., Inc.
InventorsYoshihiro Hasegawa, Masatoshi Okubo, Tetsuo Sasaki
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Abstract
A power system stabilization system is provided between power generation equipment significantly fluctuating in output and a power system required to maintain a predetermined voltage. In the power system stabilization system, a voltage detection device and a current detection device detect voltage and current, respectively, of the power system and voltage and current thus detected are used to calculate a level of active power required and that of reactive power required which are referred to to provide charging and discharging from a rechargeable battery to the power system via an A-D converter.
Claims12
A power system stabilization system for stabilizing a power system transmitting power from first equipment that generates power to second equipment that consumes power, said power system stabilization system comprising:
- a rechargeable power supply system including a rechargeable battery and converting direct-current power of said rechargeable battery into alternating-current power and supplying the alternating-current power to said power system;
- a detection circuit for detecting a difference between a previously set value of active power, a previously set value of reactive power, and a preset reference frequency of said power system, and a present value thereof;
- and
- a control circuit, responsive to a result obtained in said detection circuit, for controlling at least one of active power and reactive power output from said rechargeable power supply system.
A method of stabilizing a power system via a rechargeable power supply system provided between power generation equipment and power consumer equipment, comprising the steps of:
- detecting a frequency, active power, and reactive power of said power system;
- determining deviations of the frequency, the reactive power and the active power from a preset reference frequency, a preset reference active power and a preset reference reactive power;
- and
- responding to a result of the determining step, controlling at least one of an active power and a reactive power output from said rechargeable power system to supply said power consumer equipment with a predetermined power.
Dependencies are inferred from the claim text.