Method used for reducing action frequency of switch device in switch device and simulation device combination adjusting system
A technology of switchgear and analog device, applied in the field of regulation system, can solve the problem of high working frequency of contactors, achieve good economic benefits, reduce accident risks, and improve the effects of sensitivity
Active Publication Date: 2017-08-22
DATANG XIANGTAN POWER GENERATION
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] In order to solve the technical problem that the current electric heater load changes frequently and the contactor operating frequency is too high, the present invention provides a method for reducing the frequency of switching equipment in the adjustment system of the combination of switching equipment and analog equipment
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0010] see figure 1 , when the heating load is working, divide the actual power by the power of a single group of electric heaters to obtain the number of groups that the electric heater should be put into X, and the number of groups that the electric heater should be assigned to the contactor control is Y, and the total number of solid state relays is Z;
[0011] When X>Y+Z, Y'=Y+1; when X<Y, Y'=Y-1; then assign Y' electric heaters to the contactor group for control, and X-Y' The electric heater is assigned to the solid state relay group for control.
[0012] The control method uses a new power division algorithm to reduce the action frequency of the contactor group, improve the power adjustment accuracy, save power consumption of the factory, and reduce the probability of accidents. Similar designs can be used in other control systems combining switchgear and analog equipment, such as the HVAC system combining ordinary air conditioners and inverter air conditioners, the co...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method used for reducing the action frequency of a switch device in a switch device and simulation device combination adjusting system. The method comprises the steps that the actual power is divided by the power of a single group of electric heater when a heating load works, so as to acquire the number of groups of electric heaters to be input X; the number of groups of electric heaters to be assigned to contactors for control is Y; the total number of solid state relays is Z; if X is greater than the sum of Y and Z, Y' is equal to the sum of Y and 1; if X is less than Y, Y' is equal to Y minus 1; Y' electric heaters are assigned to the contactor group for control; and X-Y' electric heaters are assigned to the solid state relay group for control. The method provided by the invention has the advantages that an analog adjusting device is preferentially driven when the heating load power changes; the sensitivity of the adjusting system is improved; the action frequency of the switch device is reduced; simply by improving the control logic, the control precision of the system is improved without hardware upgrade; the economic efficiency is good; the accident risk is reduced; and the accident risk cost is reduced.
Description
technical field [0001] The invention relates to a method for reducing the action frequency of a switchgear in an adjustment system combining a switchgear and an analog device. Background technique [0002] The denitrification system of Unit #2 of Datang Xiangtan Power Generation Company is equipped with a set of 1100KW electric heater for pyrolysis of urea solution. The set of 1100KW electric heaters is composed of 22 groups of 50KW heaters, of which 16 groups are controlled by contactors, and 6 groups are controlled by SSRs (solid state relays). Among them, 6 groups of SSRs can realize 0-100% full-scale control through PWM modulation pulses. The original control strategy calculates the power command as an integer and a remainder, the integer is assigned to the contactor, and the remainder is assigned to the SSR group. Due to frequent changes in unit load and high combination frequency of contactor groups, there have been two accidents of contactor aging and fire in the two...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): H05B1/02
CPCH05B1/023
Inventor 文杞梓胡昊
Owner DATANG XIANGTAN POWER GENERATION