Thermal power generating unit flexibility transformation operation index detection system

Abstract

The utility model relates to the technical field of thermal power generating unit detection, in particular to a thermal power generating unit flexibility transformation operation index detection system which comprises an index monitoring assembly, a data acquisition assembly, a central control unit, a data display assembly and a data storage assembly. The index monitoring assembly is connected with the data acquisition assembly, the data acquisition assembly is in protocol connection with the central control unit, the data display assembly and the data storage assembly are respectively and electrically connected with the central control unit, and the index monitoring assembly comprises a current sensor, a data processing module and a power supply module. The current sensor is fixedly installed at the wire outlet end of a generator and the low-voltage side of a transformer in the thermal power generating unit and used for measuring the current of the thermal power generating unit, and the current sensor is connected with the analog quantity input port of the data acquisition assembly through a shielded twisted pair.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal power unit detection, in particular to a thermal power unit flexibility transformation operation index detection system. Background Art

[0002] With the rapid development of renewable energy and the deepening of electricity market reforms, the power system is placing higher demands on the flexibility of thermal power units. To adapt to the needs of power dispatch under this new situation, thermal power units need to undergo flexibility retrofits to improve load regulation rates, expand their operating load range, and better participate in the grid's frequency regulation and peak-valley regulation. Therefore, real-time monitoring of thermal power unit operating indicators is particularly important. Currently, thermal power unit operating indicators are primarily monitored statically. Traditional monitoring systems, which mostly rely on offline measurements or online measurements with long intervals, are unable to reflect the dynamic characteristics of thermal power units. This is especially true under frequent deep peak-shaving conditions, where transient monitoring data is often lost. To address these issues, we have designed a thermal power unit flexibility retrofit operating indicator detection system. Utility Model Content

[0003] The purpose of this utility model is to provide an operating index detection system for the flexibility transformation of thermal power units, which adopts a variety of high-precision sensors to conduct all-round monitoring of electrical and mechanical quantities, including key indicators such as current, voltage, frequency, phase, and speed. It not only improves the accuracy and real-time performance of data acquisition, enhances information sharing and fusion capabilities, but also significantly improves the safety and operating efficiency of thermal power units, providing solid technical support for flexibility transformation.

[0004] The embodiments of the present invention are achieved through the following technical solutions:

[0005] A thermal power unit flexibility transformation operation index detection system includes: an index monitoring component, a data acquisition component, a central control unit, a data display component and a data storage component; the index monitoring component is connected to the data acquisition component, the data acquisition component is protocol-connected to the central control unit, the data display component and the data storage component are respectively electrically connected to the central control unit, wherein the index monitoring component includes: a current sensor, the current sensor is fixedly installed at the generator output terminal and the low-voltage side of the transformer in the thermal power unit, and is used to measure the current of the thermal power unit, and the current sensor is connected to the analog input port of the data acquisition component via a shielded twisted pair cable.

[0006] Optionally, the indicator monitoring component also includes: a voltage sensor, which is fixedly installed at the generator output terminal and the high-voltage side of the transformer in the thermal power unit, and is used to measure the voltage level of the thermal power unit. The voltage sensor is connected to the analog input port of the data acquisition component through a shielded twisted pair cable.

[0007] Optionally, the indicator monitoring component also includes: a frequency sensor, which is fixedly installed at the generator output terminal in the thermal power unit and is used to measure the grid frequency. The frequency sensor is connected to the analog input port of the data acquisition component via a shielded twisted pair cable.

[0008] Optionally, the indicator monitoring component also includes: a phase sensor, which is fixedly installed at the generator output terminal in the thermal power unit and is used to measure the phase difference between voltage and current. The phase sensor is connected to the analog input port of the data acquisition component through a shielded twisted pair cable.

[0009] Optionally, the indicator monitoring component also includes: a speed sensor, which is fixedly installed on the turbine shaft end in the thermal power unit and is used to measure the rotor speed of the turbine. The speed sensor is connected to the pulse input port of the data acquisition component via a shielded twisted pair cable.

[0010] Optionally, it further includes a box, wherein the data acquisition component, central control unit and data storage component are fixedly installed inside the box, the data display component is fixedly installed on one side of the outside of the box, and multiple interfaces are fixedly installed at one end of the outside of the box.

[0011] Optionally, a mounting block is fixedly provided on the other side of the box body, a middle portion of the mounting block is through-going, and a thread is fixedly provided at the through-going portion.

[0012] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0013] This utility model adopts a variety of high-precision sensors to conduct all-round monitoring of electrical and mechanical quantities, including key indicators such as current, voltage, frequency, phase, and speed. It not only improves the accuracy and real-time performance of data acquisition, enhances information sharing and fusion capabilities, but also significantly improves the safety and operating efficiency of thermal power units, providing solid technical support for flexibility transformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the principle of a thermal power unit flexibility transformation operation index detection system provided by the utility model;

[0015] Figure 2This is a structural diagram of an operating index detection system for flexibility transformation of thermal power units provided by the utility model;

[0016] Legend: 1. Box body; 2. Box cover; 3. Mounting block; 4. Interface; 101. First data display component; 102. Second data display component. DETAILED DESCRIPTION

[0017] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0018] like Figure 1 As shown, the utility model provides one of the embodiments: a thermal power unit flexibility transformation operation index detection system, including: an index monitoring component, a data acquisition component, a central control unit, a data display component and a data storage component; the index monitoring component is connected to the data acquisition component, the data acquisition component is protocol-connected to the central control unit, the data display component and the data storage component are electrically connected to the central control unit respectively, wherein the index monitoring component includes: a current sensor, the current sensor is fixedly installed at the generator output terminal and the low-voltage side of the transformer in the thermal power unit, and is used to measure the current of the thermal power unit, and the current sensor is connected to the analog input port of the data acquisition component through a shielded twisted pair cable.

[0019] Specifically, the current sensor used in this embodiment is a Hall-effect current sensor, which is fixedly installed at the generator output terminal and the low-voltage side of the transformer in the thermal power unit. Utilizing the Hall effect, the sensor senses a magnetic field whose strength is proportional to the current and outputs a voltage signal that is linearly related to the current magnitude. This is used to measure the current magnitude of the thermal power unit and reflect load changes. It is understood that the sensor provided in this embodiment is specifically installed at corresponding locations in the thermal power unit. The installation relationship can be fixed or removable. In addition to the port connection provided in this embodiment, wireless connection can also be used according to actual needs.

[0020] In this embodiment, as a specific supplement to the operating indicators, the indicator monitoring component also includes: a voltage sensor, which is fixedly installed at the generator output terminal and the high-voltage side of the transformer in the thermal power unit, and is used to measure the voltage level of the thermal power unit. The voltage sensor is connected to the analog input port of the data acquisition component through a shielded twisted pair cable.

[0021] The voltage sensor used in this embodiment is specifically a resistor voltage divider voltage sensor, which is fixedly installed at the generator output terminal and the high-voltage side of the transformer in the thermal power unit. It uses the resistor voltage divider principle to convert the high voltage signal into a proportional low voltage signal to measure the voltage level of the thermal power unit and reflect the excitation state.

[0022] In this embodiment, as a specific supplement to the operating indicators, the indicator monitoring component also includes: a frequency sensor, which is fixedly installed at the generator output terminal in the thermal power unit and is used to measure the grid frequency. The frequency sensor is connected to the analog input port of the data acquisition component through a shielded twisted pair cable.

[0023] The frequency sensor used in this embodiment is specifically a zero-point detection frequency sensor, which is fixedly installed at the generator output terminal of the thermal power unit. The specific frequency is obtained by detecting the number of zero crossings of the voltage signal per unit time to measure the grid frequency and reflect the active power balance.

[0024] In this embodiment, as a specific supplement to the operating indicators, the indicator monitoring component also includes: a phase sensor, which is fixedly installed at the generator output terminal in the thermal power unit and is used to measure the phase difference between voltage and current. The phase sensor is connected to the analog input port of the data acquisition component through a shielded twisted pair cable.

[0025] The phase sensor used in this embodiment specifically adopts a phase comparison sensor, which is fixedly installed at the generator output terminal of the thermal power unit. By comparing the zero-crossing points of the voltage and current signals, the phase difference is obtained. The phase difference is proportional to the reactive power. The phase difference between voltage and current can be obtained. The staff can obtain the reactive power of the unit based on this data.

[0026] In this embodiment, as a specific supplement to the operating indicators, the indicator monitoring component also includes: a speed sensor, which is fixedly installed on the turbine shaft end in the thermal power unit and is used to measure the rotor speed of the turbine. The speed sensor is connected to the pulse input port of the data acquisition component via a shielded twisted pair cable.

[0027] The speed sensor used in this embodiment specifically adopts an incremental encoder, which is fixedly installed on the turbine shaft end in the thermal power unit. The encoder is driven to rotate by the rotation of the rotor. The encoder outputs a pulse signal with a pulse frequency proportional to the speed to measure the turbine rotor speed and reflect the load changes of the unit.

[0028] like Figure 2As shown, as one of the application methods of this embodiment, it also includes a box, the data acquisition component, the central control unit and the data storage component are fixedly installed inside the box, the data display component is fixedly installed on one side of the outside of the box, and a plurality of interfaces are fixedly installed at one end of the outside of the box.

[0029] The central control unit, data storage component, and data acquisition component used in this embodiment can all be arranged inside the box. The data display component is fixedly installed in the middle of any side of the outside of the box. The data display component uses a liquid crystal display screen and can include multiple ones. The data display component in this embodiment uses two display screens. The outside of the box also includes an interface for connecting other external components.

[0030] More specifically, a mounting block is fixedly provided on the other side of the box body, a middle portion of the mounting block is through-through, and a thread is fixedly provided at the through-through portion.

[0031] The outer side of the box body is provided with a mounting block, and the mounting block can be combined with bolts to enable the system provided in this embodiment to be fixedly installed at a corresponding position of the thermal power unit, and the specific position is not limited.

[0032] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A thermal power unit flexibility transformation operation index detection system, characterized in that: include: An indicator monitoring component, a data acquisition component, a central control unit, a data display component and a data storage component; the indicator monitoring component is connected to the data acquisition component, the data acquisition component is connected to the central control unit by protocol, the data display component and the data storage component are electrically connected to the central control unit respectively, wherein the indicator monitoring component includes: a current sensor, the current sensor is fixedly installed at the generator output terminal and the low-voltage side of the transformer in the thermal power unit, and is used to measure the current of the thermal power unit, and the current sensor is connected to the analog input port of the data acquisition component through a shielded twisted pair cable.

2. The thermal power unit flexibility transformation operation index detection system according to claim 1 is characterized in that: The indicator monitoring component also includes: a voltage sensor, which is fixedly installed at the generator output terminal and the high-voltage side of the transformer in the thermal power unit, and is used to measure the voltage level of the thermal power unit. The voltage sensor is connected to the analog input port of the data acquisition component through a shielded twisted pair cable.

3. The thermal power unit flexibility transformation operation index detection system according to claim 2 is characterized in that: The indicator monitoring component also includes: a frequency sensor, which is fixedly installed at the generator output terminal in the thermal power unit and is used to measure the grid frequency. The frequency sensor is connected to the analog input port of the data acquisition component through a shielded twisted pair cable.

4. The thermal power unit flexibility transformation operation index detection system according to claim 3 is characterized in that: The indicator monitoring component also includes: a phase sensor, which is fixedly installed at the generator output terminal in the thermal power unit and is used to measure the phase difference between voltage and current. The phase sensor is connected to the analog input port of the data acquisition component through a shielded twisted pair cable.

5. The thermal power unit flexibility transformation operation index detection system according to claim 4 is characterized in that: The indicator monitoring component also includes: a speed sensor, which is fixedly installed on the turbine shaft end in the thermal power unit and is used to measure the rotor speed of the turbine. The speed sensor is connected to the pulse input port of the data acquisition component via a shielded twisted pair cable.

6. The thermal power unit flexibility transformation operation index detection system according to any one of claims 1 to 5, characterized in that: It also includes a box body, wherein the data acquisition component, central control unit and data storage component are fixedly arranged inside the box body, the data display component is fixedly arranged on one side of the outside of the box body, and multiple interfaces are fixedly arranged on one end of the outside of the box body.

7. The thermal power unit flexibility transformation operation index detection system according to claim 6 is characterized in that: A mounting block is fixedly provided on the other side of the box body, a middle portion of the mounting block is passed through, and a thread is fixedly provided at the passed-through portion.

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