Primary and secondary frequency modulation cooperative control method for hydroelectric generating set
A secondary frequency modulation and hydroelectric unit technology, which is applied in the direction of AC network voltage adjustment, electrical components, circuit devices, etc., can solve the problems of affecting the effect of unit frequency modulation, lack of coordination, conflicts between the primary and secondary frequency modulation functions of the unit, etc. Achieve the effect of improving the performance and effect of frequency modulation and good peak regulation and frequency modulation
Inactive Publication Date: 2020-12-11
STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST +1
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Problems solved by technology
Since the monitoring system and the speed control system are usually not from the same manufacturer, the differences in the design concepts of different manufacturers often only consider the functions of their respective systems, and there is a lack of necessary coordination between each other. Often, the primary and secondary frequency regulation functions of the unit conflict with each other, seriously Affected the effect of unit frequency regulation
Method used
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Embodiment 1
[0045] The following is the application of a hydroelectric unit primary and secondary frequency modulation coordinated control method of the present invention to a certain hydroelectric unit.
[0046] Step 1: Make sure that the hydroelectric unit is put into primary frequency regulation and secondary frequency regulation functions;
[0047] Step 2: Set the judgment condition 1. Condition 1 is to judge whether the current secondary frequency regulation command is increasing or reducing the load; if it is increasing, the value of condition 1 is set to 1, and if it is decreasing, the value of condition 1 is set to 0;
[0048] The judgment formula is shown in formula 1:
[0049] P 1 -P 0 >0 is increasing
[0050] P 1 -P 0 <0 is subtracting Equation 1
[0051] P 1 – The second FM instruction currently received;
[0052] P 0 – The second frequency modulation command received at the previous moment;
[0053] Step 3: Set judgment condition 2, which is to judge the control mo...
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The invention relates to the technical field of power systems, in particular to a primary and secondary frequency modulation cooperative control method for a hydroelectric generating set. The controlmethod comprises the steps: determining the secondary frequency modulation state of the hydroelectric generating set; determining a control mode of the hydroelectric generating set; determining a primary frequency modulation state of the hydroelectric generating set; judging whether the primary and secondary frequency modulation action directions of the hydroelectric generating set are opposite ornot; and controlling the hydroelectric generating set according to the principle that the primary frequency modulation action direction and the secondary frequency modulation action direction are opposite, primary frequency modulation is preferred, and the primary frequency modulation action direction and the secondary frequency modulation action direction are the same and do not influence each other. Two different control modes of the opening degree mode and the power mode of the hydroelectric generating set are considered, and the problem that the primary frequency modulation function and the secondary frequency modulation function of the set conflict with each other due to lack of cooperative cooperation between systems is solved; according to the invention, the overall frequency modulation performance and effect of the unit are improved, so the hydroelectric generating set can better participate in peak regulation and frequency modulation of a power grid.
Description
technical field [0001] The invention relates to the technical field of power systems, in particular to a coordinated control method for primary and secondary frequency modulation of a hydroelectric unit. Background technique [0002] The essence of power grid frequency regulation is to control the dynamic balance between the power generated by the generator set and the power required by the grid belt load. The primary frequency regulation function of the hydroelectric unit refers to the automatic control process in which the active power of the unit can be quickly increased or decreased by controlling the guide vanes of the hydraulic turbine when the grid frequency deviates from the rated value of 50HZ, so that the grid frequency can be quickly maintained and stable. . The secondary frequency regulation function of hydroelectric units, that is, automatic generation control (AGC), means that the power dispatching agency classifies and controls hydroelectric units in the netw...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H02J3/24H02J3/14
CPCH02J3/24H02J3/144Y02B70/3225Y04S20/222
Inventor 鄢波查海涛蒙淑平吴道平何钧肖志怀刘东李超顺
Owner STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST