289 results about "Reactive control" patented technology

A wind turbine generator control system is provided for controlling output of a plurality of tightly-coupled windfarms connected at a point of common coupling with a power system grid. A master reactive control device employs algorithms whose technical effect is to coordinate the real power, reactive power and voltage output of the multiple windfarms. The controller incorporates a reactive power regulator that can be used to regulate reactive power, power factor or voltage at the point of common coupling and an active power regulator that can be used to regulate real power at the point of common coupling; such that each windfarm is not asked to contribute or violate its own operating capability.

A product shelf life monitoring system comprising an active substituted diacetylenic monomer component indicator composition is responsive to an integral of varying temperature over time to effect a solid state polymerization in the active monomer which results in a visible change in color density or the like at a rate designed to closely approximate the degradation, or shelf life, of an associated foodstuff or medicament product. The reactivity of the monomer component upon which the time-temperature integral of the indicator composition, and thus the represented shelf life, primarily depends may be readily varied by refluxing a solution of the monomer in a selected solvent for a predetermined time prior to recrystallization of the monomer for incorporation into the indicator composition.

The invention discloses a passive safe cooling system. The system comprises a water replenishing tank, an advanced safe filling tank, a built-in material replacing water tank, a pressure releasing system, a passive emergency water supply system and a passive safety shell cooling system, wherein the water replenishing tank, the advanced safe filling tank, the built-in material replacing water tank and the pressure releasing system are all arranged inside a safety shell and respectively communicated with a pressure container; the passive emergency water supply system hermetically penetrates through the safety shell, corresponds to a steam generator arranged inside the safety shell and is used for realizing water supply reflowing and heat output of the steam generator; the passive safety shell cooling system hermetically penetrates through the safety shell so as to output the heat out of the safety shell. Without intervention of a passive system and an operator, the passive safe cooling system disclosed by the invention can be used for effectively realizing safety functions such as reactor core reactivity control, afterheat output and radioactive substance containment under accident conditions and ensuring that a reactor core can be cooled effectively and maintained in a safe shutdown state, so that the safety of a nuclear power station is improved and the building cost and operating cost of the nuclear power station are also greatly lowered.

The invention discloses a reactivity control method of a pebble-bed high-temperature gas cooled reactor and a telescopiform control rod. The invention discloses the telescopiform control rod arranged at a side reflective layer of a reactor and capable of realizing cold shutdown independently. The control rod comprises an inner rod, an outer rod, and a guide barrel assembly which are vertical and coaxial, wherein the outer rod and the guide barrel assembly are hollow cylindrical objects, the top end of the inner rod is capable of moving up and down in the outer rod, and the other end of the inner rod is positioned below the guide barrel assemble and is capable of moving up and down in a control rod channel coaxial with the guide barrel assembly along with the top end of the inner rod; the top end of the outer rod is capable of moving up and down in the guide barrel assembly, and the other end of the outer rod is capable of moving up and down in the control rod channel along with the top end of the outer rod. In the premise of not changing a pressure vessel height and an overall design parameter of other existing modular pebble-bed high temperature gas cooled reactors, the effective control of the control rod can be maximally improved, the reactivity value of the control rod system is improved; meanwhile, the starting and running control operation of the modular pebble-bed high-temperature gas cooled reactor are simplified, and the technological base is established for the safety and economic running of a high-temperature reactor plant.