A capacity configuration method for energy storage-assisted thermal power unit frequency modulation
A technology of thermal power unit and capacity configuration, applied in the direction of AC network load balancing, single-network parallel feeding arrangement, etc., can solve problems such as difficulty in meeting assessment indicators, unit wear, and slow adjustment speed of thermal power units.
Active Publication Date: 2020-08-04
华泰慧能(北京)能源技术有限公司
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Problems solved by technology
[0004] What the present invention aims to solve is that the adjustment speed of the existing thermal power units is slow, it is difficult to meet the assessment indicators of the "Two Detailed Rules", and the frequent execution of frequency modulation tasks by the units leads to serious wear and tear defects, and further provides an energy storage battery capacity configuration that assists the frequency modulation of thermal power units method
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[0053] as attached figure 1 As shown, a capacity allocation method for energy storage-assisted thermal power unit frequency modulation includes the following process:
[0054] Step 1: Set the initial value E of the energy storage system capacity rate0 , the energy storage system capacity limit E" rate , the energy storage step length L, the initial value of m is 0;
[0055] Step 2: Calculate the output P(t) of the energy storage system according to the AGC command at time t;
[0056] Step 3: E rate (m)=E rate0 +m*L, calculate the energy storage capacity E according to the adjusted output of the unit rate (m) Lower assessment index k 1m 、k 2m 、k 3m value, the index k 1m For adjusting the rate index, the index k 2m To adjust the accuracy index, the index k 3m is the response time indicator;
[0057] Step 4: Next capacity value selection cycle m=m+1;
[0058] Step 5: Determine whether E is satisfied rate (m+1)=E rate (m)+L>E" rate , if satisfied, go to step 5, oth...
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The invention relates to a capacity configuration method capable of assisting a thermal power unit in frequency modulation through energy storage. The capacity configuration method capable of assisting the thermal power unit in frequency modulation through energy storage comprises the steps of gradually increasing energy storage capacity with a fixed step-length according to an AGC instruction ofa power grid; calculating values of regulation rates, regulation precision and response time of a system under different storage capacity; obtaining energy storage system capacity QBESS1 correspondingto the maximum regulation rate, energy storage system capacity QBESS2 corresponding to the maximum regulation precision and energy storage system capacity QBESS3 corresponding to the maximum responsetime; and finally taking the maximum among the QBESS1, the QBESS2 and the QBESS3 as the optimal configuration capacity QBESS of the energy storage system. According to the capacity configuration method capable of assisting the thermal power unit in frequency modulation through energy storage, the problem of parameter optimization configuration in assisting the thermal power unit in frequency modulation through energy storage is solved.
Description
Technical field: [0001] The invention relates to an adaptive control method for a thermal power unit, in particular to a capacity configuration method for energy storage-assisted frequency modulation of a thermal power unit. Background technique: [0002] With the large-scale grid integration of wind power, photovoltaic and other new energy power generation, its rapid fluctuation puts forward higher requirements for the speed of grid frequency adjustment. The North China power grid has a single power structure, dominated by large-scale thermal power units, with a relatively high proportion of thermal power sources, and a low proportion of flexible adjustable power sources such as pumped storage. Due to the weak ACE adjustment ability of the thermal power unit, due to the limitation of the ramp rate during frequency regulation, the response is slow and the cost is high, the response time lag is long, the unit ramp rate is low, and the AGC command cannot be accurately tracked ...
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IPC IPC(8): H02J3/38H02J3/32
CPCH02J3/32H02J3/38
Inventor 李海峰王光灏邓焱宋晨雷
Owner 华泰慧能(北京)能源技术有限公司