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The invention discloses a wind-driven generating set and offshore platform grid non-stop grid connection test system and a wind-driven generating set and offshore platform grid non-stop grid connection test method. In the system, the high-voltage of a transformer is connected with the input end of an outlet switch of a wind-driven generating set; the output end of the outlet switch of the wind-driven generating set is connected with the input end of the wind-driven generating set; the output end of a thermoelectric generating set is connected with an inlet bus bar of a load device; the low-voltage end of the transformer is connected with the inlet bus bar of the load device; an auxiliary power supply of the load device is connected with the load device; the auxiliary power supply of the transformer is connected with the transformer; the auxiliary power supply of the thermoelectric generating set is connected with the thermoelectric generating set; the wind-driven generating set is connected with test monitoring equipment; the outlet switch of the wind-driven generating set is connected with the test monitoring equipment; and the thermoelectric generating set is connected with the test monitoring equipment. In the system and the method, the grid connection test is performed on the wind-driven generating set and a simulated offshore platform grid on land first and then the wind-driven generating set is integrally transported to the sea for installing after regulating, so accidents of power failure and production stop in an offshore grid connection process are avoided.

A method for improving the combustion performance of coal dust through using sludge or wastes comprises the following steps: burdening sludge or wastes containing organic matters into particulate or granular fire coal in a space section from a raw coal pile to the feeding port of a coal mill, and grinding the sludge or wastes and the particulate or granular fire coal to prepare coal dust of the sludge or wastes containing organic matters, wherein the burdening amount of the sludge or wastes containing organic matters is 1-30% of the weight of the particulate or granular fire coal. The method uses the sludge and the wastes as a productive resource for improving the combustion performance of the coal dust, so it is convenient for the coal mills of a large quantity of cement plants and hydraulic power plants to improve the performance of the anthracite inferior coal dust through utilizing local sludge and wastes, and also realizes the full utilization of the huge renewable energy sources comprising the sludge and the wastes; and the method has the advantages of no secondary pollution, and no extract waste utilization or environmental protection cost.