Autonomous frequency data acquisition and control optimization device for intermediate storage type pulverized coal furnace

Abstract

The invention relates to an autonomous frequency data acquisition and control optimization device for a middle storage type pulverized coal furnace. The autonomous frequency data acquisition and control optimization device comprises a data acquisition module, a redundant data processing module, a control cabinet, an uninterruptible power supply module and a man-machine interaction module. The data acquisition module and the redundant data processing module are connected through a serial port data line, are fixed in a control cabinet and are powered by the uninterruptible power supply module, the man-machine interaction module realizes data interaction with the redundant data processing module through an industrial Ethernet, and a data external output interface is integrated in the data processing module; according to the autonomous frequency data acquisition and control optimization device for the intermediate storage type pulverized coal furnace, grid-connected frequency high-precision acquisition based on Fourier transform is realized based on an autonomous controllable programmable logic controller hardware architecture, the resolution reaches 0.001 Hz, real-time control optimization of the grid-connected frequency is realized based on a measured value, and the real-time control optimization of the grid-connected frequency is realized. And the primary frequency modulation action sensitivity and the frequency modulation index of the unit are obviously improved.

Description

Technical Field

[0001] The invention relates to the field of frequency control optimization of coal-fired units, and in particular to an autonomous frequency data acquisition and control optimization device for a central storage type pulverized coal furnace. Background Art

[0002] Coal-fired boilers can be divided into two categories according to the classification of the pulverizing system: direct-blowing type and intermediate storage type. The intermediate storage type directly transports the ground coal powder to the furnace for combustion through the powder bin, so its load response rate is faster. Based on this, the grid-connected frequency control of this type of unit should adopt a higher precision method; Traditional coal-fired units mostly use speed probe signals as the basic condition for grid-connected frequency action response. However, due to the sampling accuracy of the speed probe, high-precision frequency resolution cannot be achieved. Taking 0.1 revolutions as an example (general speed probe), the equivalent frequency value is 0.0016Hz, and accurate frequency transmission of 0.001Hz cannot be achieved. This leads to certain erroneous frequency correction actions during the speed conversion process. If the unit parameters are not set reasonably and the frequency regulation index response is poor, the corresponding increase in unnecessary action adjustments will require the company to bear more economic assessment burdens, greatly reducing the company's profitability. At the same time, the reliable support of the power grid cannot be effectively guaranteed. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides an autonomous frequency data collection and control optimization device for a central storage type pulverized coal furnace. The autonomous frequency data collection and control optimization device for a central storage type pulverized coal furnace uses the grid frequency as the primary frequency modulation action adjustment signal, combined with multi-dimensional frequency modulation optimization means, to maximize the primary frequency modulation action qualification rate. Signal synchronization is the key to the primary frequency modulation assessment and evaluation. By collecting the grid frequency signal, it can ensure that the unit action signal is accurate and reliable. Based on multi-dimensional optimization means, it can effectively ensure that the primary frequency modulation dynamic adjustment integral power meets the assessment standard requirements.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an autonomous frequency data acquisition and control optimization device for a central storage pulverized coal furnace, comprising a data acquisition module, a redundant data processing module, a control cabinet, an uninterruptible power supply module, and a human-computer interaction module, wherein the data acquisition module is composed of two AD analog modules; the redundant data processing module is composed of an autonomous controllable IS20 series PLC and a MODBUS TCP communication module connected via a serial port connection line; the uninterruptible power supply module is composed of two redundant 220VAC to 24VDC power supply modules; the human-computer interaction module is composed of a display, a drawer-type keyboard, and an industrial control computer connected via a power line and peripheral cables; Preferably, the control cabinet is composed of an A face and a B face, the front face is a transparent glass door, and the back face is a painted steel door; the B face of the control cabinet is equipped with a circuit breaker and a circuit breaker, which are respectively connected to the socket strip and the incoming terminal block via a 2.5mm2 cable, and the 2.5mm2 cable is then connected to the uninterruptible power supply module from the incoming terminal block to achieve redundant power supply; Preferably, the redundant data processing module can analyze the PT and CT secondary signals collected by the data acquisition module based on high-speed Fourier transform, and then obtain the real-time frequency of the unit grid connection point, with a resolution of up to 0.001Hz; Preferably, the human-computer interaction module is developed by the SC-PROVIEW self-controllable PLC platform, which can display the frequency and load compensation trends in real time, and is designed with multi-user login permissions, and different login accounts can exercise different operation permissions.

[0005] Compared with the prior art, the present invention has the following beneficial effects: The present invention uses the grid frequency as the primary frequency modulation action adjustment signal, combined with multi-dimensional frequency modulation optimization means, to maximize the primary frequency modulation action qualification rate. Signal synchronization is the key to primary frequency modulation assessment and evaluation. By collecting the grid frequency signal, the unit action signal can be guaranteed to be accurate and reliable. Based on multi-dimensional optimization means, it can effectively ensure that the primary frequency modulation dynamically adjusts the integral power to meet the requirements of the assessment standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a structural schematic diagram of the present invention; In the accompanying drawings, the components represented by the reference numerals are listed as follows: Display, 1-1-RJ45 Ethernet interface, 1-2-AO output interface, 2-autonomous controllable PLC controller, 2-drawer-type keyboard, 3-industrial control computer, 4-metal guide rail, 5-uninterruptible power supply module, 6-1-incoming terminal block, 6-2-outgoing terminal block, 7-1-IS20 controller, 7-2-AD analog module, 7-3-MODBUS TCP communication module, 7-4-serial port connection cable, 8-1-upper port of circuit breaker, 8-2-lower port of circuit breaker, 9-1-upper port of circuit breaker, 9-2-lower port of circuit breaker, 10-2.5mm2 cable. DETAILED DESCRIPTION

[0007] The specific implementation mode of the present invention is as follows: Figure 1, a central storage type pulverized coal furnace autonomous frequency data acquisition and control optimization device, comprising a data acquisition module, a redundant data processing module, a control cabinet, an uninterruptible power supply module, and a human-computer interaction module, wherein the data acquisition module is composed of two AD analog modules (7-2); the redundant data processing module is composed of an autonomous controllable IS20 series PLC (7-1) and a MODBUS TCP communication module (7-3) connected via a serial port connection line (7-4); the uninterruptible power supply module (5) is composed of two redundant 220VAC to 24VDC power supply modules; the human-computer interaction module is composed of a display (1), a drawer-type keyboard (2), and an industrial control computer (3) connected via a power line and peripheral cables; Reference Figure 1 Preferably, the control cabinet (11) is composed of a front face A and a back face B, the front face is a transparent glass door, and the back face is a painted steel door; the control cabinet (11) is provided with a circuit breaker (8) and a circuit breaker (9) on the B face, which are respectively connected to the socket strip (3) and the incoming terminal block (6-1) via a 2.5 mm2 cable (10); the 2.5 mm2 cable (10) is then connected to the uninterruptible power supply module (5) via the incoming terminal block (6-1) to achieve redundant power supply; Reference Figure 1 Preferably, the redundant data processing module can analyze the PT and CT secondary signals collected by the data acquisition module based on high-speed Fourier transform, and then obtain the real-time frequency of the unit grid connection point, with a resolution of up to 0.001Hz; Reference Figure 1 ,Preferably, the human-computer interaction module is developed by the SC-PROVIEW autonomous ,controllable PLC platform, which can display the frequency and load compensation ,trends in real time, and is designed with multi-user login permissions, and different ,login accounts can exercise different operation permissions.

Claims

1. A central storage type pulverized coal furnace autonomous frequency data acquisition and control optimization device, comprising a data acquisition module, a redundant data processing module, a control cabinet, an uninterruptible power supply module, and a human-computer interaction module, characterized in that: The data acquisition module is composed of two AD analog modules (7-2); the redundant data processing module is composed of an autonomous and controllable IS20 series PLC (7-1) and a MODBUS TCP communication module (7-3) connected via a serial port connection line (7-4); the uninterruptible power supply module (5) is composed of two redundant 220VAC to 24VDC power supply modules; and the human-computer interaction module is composed of a display (1), a drawer-type keyboard (2), and an industrial control computer (3) connected via a power line and peripheral cables.

2. The device for autonomous frequency data acquisition and control optimization of a central storage type pulverized coal furnace according to claim 1, characterized in that: The control cabinet (11) is composed of an A face and a B face and a back face, the front face is a transparent glass door, and the back face is a painted steel door; the B face of the control cabinet (11) is provided with a circuit breaker (8) and a circuit breaker (9), which are respectively connected to the socket strip (3) and the incoming line terminal block (6-1) via a 2.5 mm2 cable (10); the 2.5 mm2 cable (10) is then connected to the uninterruptible power supply module (5) via the incoming line terminal block (6-1) to achieve redundant power supply.

3. The device for autonomous frequency data acquisition and control optimization of a central storage type pulverized coal furnace according to claim 1, characterized in that: The redundant data processing module can analyze the PT and CT secondary signals collected by the data acquisition module based on high-speed Fourier transform, and then obtain the real-time frequency of the unit grid connection point, with a resolution of up to 0.001 Hz.

4. The device for autonomous frequency data acquisition and control optimization of a central storage type pulverized coal furnace according to claim 1, characterized in that: The human-computer interaction module is developed by the SC-PROVIEW self-controllable PLC platform, which can display the frequency and load compensation trends in real time, and is designed with multi-user login permissions. Different login accounts can exercise different operation permissions.

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