Method for dynamically calculating liquid supplying amount of liquefied natural gas liquid storage tank

The invention discloses a method which can obtain the accrual liquid supplying amount by dynamically calculating liquid supplying amount of a liquefied natural gas liquid storage tank. The method comprises the steps of 1, sampling liquid level information in real time to generate liquid level data; 2, merging the liquid level data into aggregation liquid level data; 3, merging aggregation liquid level data in which the aggregation liquid levels are gradually increased, the full-range times are larger than the shortest liquid adding times, the quotients of the liquid adding amounts and the liquid adding starting amounts are larger than the minimum liquid adding percentages, the liquid adding speeds are smaller than the minimum liquid adding speeds respectively to generate liquid adding records; 4, merging the two liquid adding records if the difference of the final timestamp of the last liquid adding record and the initial timestamp of the liquid adding record at this time is smaller than the liquid adding rec