A provincial natural gas transmission station intelligent adjustment control method
A technology of intelligent adjustment and control method, applied in gas/liquid distribution and storage, pipeline system, mechanical equipment, etc., can solve the problem that the gas supply branch cannot be switched without disturbance, lack of linkage, independent of each other, and small overshoot, etc. problems, to achieve the effect of reducing the need for personnel dependence, wide adaptability, and reducing workload
Active Publication Date: 2021-06-18
ZHEJIANG NATURAL GAS DEV CO LTD
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Problems solved by technology
[0003] The technical problem to be solved and the technical task proposed by the present invention are to overcome the problem that the upstream regulating branches in the existing provincial natural gas transmission stations lack linkage and are independent from each other, and cannot perform undisturbed switching when the gas supply branch fails. The invention proposes a provincial-level natural gas transmission station intelligent regulation control method, the control method is suitable for the upstream regulator, so that the regulator can achieve steady-state control in a large range, and the overshoot is extremely small, and can be simultaneously Realize the do-not-disturb switching of the gas supply branch
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[0057] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0058] Such as Figure 1~5 As shown, a provincial-level natural gas transmission station intelligent regulation control method includes two parts: controller design and branch non-disturbance linkage control logic design. Under normal circumstances, the controller is designed for the main regulator to regulate and control the upstream field. For each gas transmission branch of the station, when any gas transmission branch fails, switch the gas transmission branch according to the non-disturbance linkage control logic design of the branch;
[0059] 1) Controller design:
[0060] 1.1) The main regulator adopts incremental PI control, all regulating valves share a valve position increment, and at the same time ensure that only one branch is in action at the same time point, and the other branches keep the current valve position unchanged;
[006...
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The invention relates to the field of natural gas transmission, in particular to an intelligent adjustment control method for provincial natural gas transmission stations. The upstream adjustment branches of the existing natural gas transmission stations lack linkage and are independent of each other, and the trouble-free switching cannot be performed when the gas supply branches fail. The present invention is an intelligent regulation control method for provincial natural gas transmission stations. The method In the controller design, the incremental PI is used as the main controller, the PI parameter change is calculated by fuzzy algorithm, the following speed of the regulating valve and the valve characteristic curve are introduced, and the calculation is performed to correct the PI parameter change twice to obtain the final parameter correction value, optimize the adjustment process; realize series control of the two branches through logical interlocking, trigger the branch switching according to the valve position, flow and pressure changes when any branch is cut off, and switch the faulty branch out of the interlocking control to Control is taken over by another branch. The present invention can perform steady-state control on the upstream regulator in a large range, has small overshoot, and can realize non-disturbance switching of gas supply branches.
Description
technical field [0001] The invention relates to the technical field of natural gas transmission, in particular to an intelligent adjustment control method for provincial natural gas transmission stations. Background technique [0002] In the design of the gas transmission station of the provincial natural gas pipeline network, it is necessary to adjust and control the pressure and flow of the downstream. Generally, two electric control valves controlled by the PLC of the station are used, and the downstream is generally a gas connection station for local city gas. The pressure needs to be adjusted twice, so a self-operated regulating valve is often used, and the flow rate changes greatly at different times. In the planning of stations, considering the construction costs of land and pipelines, the upstream and downstream stations are often set up adjacent to each other, resulting in similar settings of the upstream and downstream regulators, which are adjusted independently a...
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IPC IPC(8): F17D3/01
Inventor 沈国良季寿宏谭汉邵迪
Owner ZHEJIANG NATURAL GAS DEV CO LTD
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