50results about How to "Avoid running risks" patented technology

The invention discloses a ground source pipe detection device which comprises a first pipeline and a second pipeline which are used for connecting any two positions on a ground source pipe, and pressure measuring devices are arranged at the tail ends, used for connecting the ground source pipe, of the first pipeline and the second pipeline. A flow measuring device with a switch valve I is furtherarranged on the first pipeline, and a switch valve II is arranged on the second pipeline; a water supplementing pipeline with a switching valve III is connected between the first pipeline and the second pipeline through a circulating water pump; therefore, the circulating water pump, the first pipeline, the second pipeline and the ground source pipe form a circulating pipeline. The invention further provides a ground source pipe detection method. By means of the device and method, the length, resistance and flow of the ground source pipe can be detected, measurement is convenient and accurate,and the operation risk can be effectively reduced.

The invention discloses an emergency coordination control method and system for coping with a multi-circuit direct current blocking fault. The method comprises the steps of obtaining basic power grid information, and obtaining an under-control quantity which can be borne by a system and meets the safety and stability of a power system under a multi-circuit direct current simultaneous or successive blocking fault according to time domain simulation software, calculating an additional control resource quantity due to overlapping of control measures after a multi-circuit direct current simultaneous or successive blocking fault, establishing an extended control resource pool considering simultaneous or successive blocking faults under the maximum power of the multi-circuit direct current, wherein the extended control resource pool comprises a single direct-current control resource and an additional control resource, and calculating an emergency additional control quantity according to the direct-current operation power, the under-control quantity and the total real-time safety control action quantity, adding corresponding control resources according to the extended control resource pool, and issuing the corresponding control resources to the direct-current cooperative control master station for execution. And the stability problem caused by multi-loop high-power direct current blocking can be effectively prevented.