Regulating method of reverse-running electricity generation of water pump of pump station
An adjustment method and water pump technology, which are applied in the direction of controlling generators, electrical components, single-network parallel feeding arrangements, etc., can solve the problems of non-adjustability and failure to maintain the operation efficiency of hydro turbine power generation, so as to improve the operation efficiency of power generation and improve the power generation efficiency. volume effect
Inactive Publication Date: 2012-05-16
SHANGHAI JIAO TONG UNIV SUBEI RES INST
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Problems solved by technology
The frequency conversion device of the unit type can improve the power generation efficiency of the turbine to a certain extent. Due to the non-adjustability of the operating frequency of the unit, when the power generation head changes, it cannot maintain the turbine at the best power generation efficiency.
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[0025] In order to keep the turbine at the best power generation efficiency at all times, the frequency conversion adopts the "static" frequency conversion conversion mode with continuously adjustable frequency, and adopts a closed-loop adjustment method for water head change, frequency adjustment, and speed adjustment, and adjusts the machine side frequency according to the frequency conversion time of the water head , so that the turbine always runs at the operating speed of high-efficiency power generation.
[0026] According to the efficiency characteristic curve of the water turbine, for a water turbine under a certain water head and a certain performance, its optimal operating efficiency corresponds to a specific speed. The reverse power generation regulation of the water pump can be divided into the power generation regulation under the condition of constant water head and different turbine performance and the power generation regulation under the condition of constant w...
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The invention provides a regulating method of the reverse-running electricity generation of a water pump of a pump station, which relates to the technical field of pump stations. The regulating method comprises the following steps of: (1) starting the water pump to run in a no-load mode by a frequency conversion device at 40Hz frequency corresponding rotating speed and absorbing electric energy from an electric network by a water-pump motor through the frequency conversion device at the moment; (2) starting a water discharging gate, running a water pump and a water turbine in the same direction to enter an electricity generation state from an electric state and stabilizing electricity generation rotating speed in the 40Hz frequency corresponding rotating speed, at the moment, the water pump works in an electricity generator state under a water head, and energy flows into the electric network through the frequency conversion device; and (3) searching the optimal running electricity generation rotating speed of the water turbine, running the electricity generator at the optimal electricity generation rotating speed and obtaining optimal electricity generation efficiency. The invention can improve electricity generation quantity of 50 percent and ensure that the reverse-running electricity generation possibility of the water pump which can not run under an electricity generation work condition originally is increased by regulating the electricity generation running frequency.
Description
technical field [0001] The present invention relates to an adjustment method in the technical field of pumping stations, in particular to an adjustment method for generating electricity generated by reverse operation of water pumps in the pumping station using power generation operation frequency conversion. Background technique [0002] A water pump with good performance can be used as a water turbine. Some pump stations in China have tried the reverse power generation method of the water pump and achieved obvious economic benefits. [0003] Since the design of the water pump is based on the highest operating efficiency of the pump itself, and at the same time to overcome the loss of the flow channel, the head of the high-efficiency area is generally higher, and when the water pump operates as a water turbine, the water head during reverse power generation operation is often higher than that during pumping operation. The rated head should be small, therefore, for general wa...
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IPC IPC(8): H02P9/00H02J3/38
Inventor 王锋姜建国乔树通左东升杨兴华王晶鑫吴玮
Owner SHANGHAI JIAO TONG UNIV SUBEI RES INST