Excitation centralized control system for small waste heat and residual pressure generator set

Abstract

The utility model belongs to the technical field of waste heat and residual pressure generator sets, and relates to an excitation centralized control system for a small-sized waste heat and residual pressure generator set, which comprises an excitation controller, and a first terminal, a second terminal, a third terminal and a fourth terminal on the excitation controller are respectively connected to a positive electrode of a power supply. A terminal at the bottom of the excitation controller is connected to the negative electrode of the power supply, the rear side of the excitation controller is connected to the measurement and control device, one side of the measurement and control device is connected to the server, the server is connected to the monitoring main station, and the positive electrode of the power supply is divided into two paths to be connected to two contacts at the top of the field suppression switch, and two contacts at the bottom of the field suppression switch are connected to a power supply cathode. According to the utility model, the centralized control system is used for controlling the excitation control system of the waste heat and waste pressure generator set, and parameters of all generator set excitation systems in a metallurgical enterprise are collected and uploaded through the server and communication technology, so that the line loss is reduced, and the power generation income is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste heat and waste pressure generator sets, and in particular relates to an excitation centralized control system for small waste heat and waste pressure generator sets. Background Art

[0002] The excitation control system for waste heat and residual pressure generator sets is typically controlled through an excitation control cabinet installed within the station or a dedicated backend system installed at the station. Most waste heat and residual pressure generator sets do not have dedicated electricians on duty. This means that when loads fluctuate, excitation adjustment of the generator set cannot be performed promptly. This untimely adjustment can lead to an unreasonable generator power factor, resulting in underexcitation or overexcitation.

[0003] Steel enterprises have a large number of large-scale equipment within their facilities. When these large-scale equipment, operating within the same system as the generator sets, start or stop, or experience short circuits or other faults, they can cause grid fluctuations, which in turn lead to unstable generator output frequency and voltage. Changes in the grid's operating structure require timely adjustments to the excitation method. Failure to do so can lead to an unreasonable generator power factor, which can severely cause generator power fluctuations and synchronization difficulties.

[0004] Moreover, the waste heat and pressure generator set is affected by complex and changeable production conditions, and the current waste heat and pressure generator set is difficult to track quickly. Therefore, a centralized excitation control system for small waste heat and pressure generator sets is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide an excitation centralized control system for small waste heat and waste pressure generator sets, which has the excitation centralized control function of small waste heat and waste pressure generator sets, and solves the problem that xx waste heat and waste pressure generator sets in the prior art are difficult to track and adjust quickly.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is that the present invention provides an excitation centralized control system for a small waste heat and waste pressure generator set, including an excitation controller, the first terminal, the second terminal, the third terminal and the fourth terminal on the excitation controller are respectively connected to the positive pole of the power supply, the bottom terminal of the excitation controller is connected to the negative pole of the power supply, the rear side of the excitation controller is connected to the measurement and control device, one side of the measurement and control device is connected to the server, the server is connected to the monitoring main station, the positive pole of the power supply is connected to the two contacts at the top of the demagnetization switch in two ways, one of which is provided with a first normally open switch K00, and the two contacts at the bottom of the demagnetization switch are connected to the negative pole of the power supply.

[0007] Preferably, the measurement and control device is internally provided with a switch K1, a switch K2, a switch K3, a switch K4, a switch K5 and a switch K6, the rear ends of the switches K1, K2, K3 and K4 are connected in parallel, and the rear ends of the switches K5 and K6 are connected in parallel.

[0008] Preferably, the first terminal is connected to the button SB1 and the normally closed switch K031 and then connected to the positive pole of the power supply, and then from the positive pole of the power supply to the rear end of the switch K1, the second terminal is connected to the button SB2 and the normally closed switch K032 and then connected to the positive pole of the power supply, the third terminal is connected to the knife switch QK1 and the normally closed switch K033 and then connected to the positive pole of the power supply, and the fourth terminal is connected to the knife switch QK2 and the normally closed switch K034 and then connected to the positive pole of the power supply.

[0009] Preferably, the front end of the switch K1 is connected to the normally open switch K031 and then to the first terminal, the front end of the switch K2 is connected to the normally open switch K032 and then to the second terminal, the front end of the switch K3 is connected to the normally open switch K033 and then to the third terminal, and the front end of the switch K4 is connected to the normally open switch K034 and then to the fourth terminal.

[0010] Preferably, the rear end of the switch K5 is connected to the positive pole of the power supply, and then connected from the positive pole of the power supply to the knife switch QK3 and the relay K03 coil, and then to the negative pole of the power supply. The two ends of the relay K03 coil are connected in parallel with the relay K04 coil. The front end of the switch K5 is connected to the normally open switch K041, the normally closed switch K01 and the relay K01 coil, and then to the negative pole of the power supply. The front end of the normally closed switch K01 is connected to the button SB3 and the normally closed switch K041, and then to the positive pole of the power supply.

[0011] Preferably, the front end of the switch K6 is connected to the normally open switch K042 and the relay K02 coil and then to the negative pole of the power supply, and the front end of the relay K02 coil is connected to the button SB4 and the normally closed switch K042 and then to the positive pole of the power supply.

[0012] Preferably, two adjacent contacts at the top of the demagnetization switch are connected to each other through a normally open switch K01, and two adjacent contacts at the bottom of the demagnetization switch are connected to each other through a second normally open switch K02.

[0013] Compared with the prior art, the advantages and positive effects of the present invention are:

[0014] 1. This utility model controls the excitation control system of the waste heat and waste pressure generator set through a centralized control system, and collects and uploads the parameters of the excitation systems of all generator sets in the metallurgical enterprise through servers and communication technology, thereby reducing line losses and increasing power generation revenue;

[0015] 2. The utility model has the function of centralized excitation control of a small waste heat and waste pressure generator set, which solves the problem that waste heat and waste pressure generator sets in the prior art are difficult to quickly track and adjust. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0017] Figure 1 This is a circuit diagram of a centralized excitation control system for a small waste heat and waste pressure generator set.

[0018] In the above figures, 1. Excitation controller, 2. Measurement and control device, 3. Server, 4. Monitoring main station, 5. Demagnetization switch. DETAILED DESCRIPTION

[0019] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0020] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0021] Example 1, as Figure 1 As shown, a centralized excitation control system for a small waste heat and waste pressure generator set includes an excitation controller 1. The excitation controller 1 controls the excitation process of the generator set, including functions such as excitation, deexcitation, magnetization, and demagnetization. By receiving instructions, the power factor of the generator is adjusted to ensure power generation stability. The centralized control function simplifies the operating process, reduces the risks caused by manual operation errors, quickly responds to load changes, and improves the dynamic adjustment capability of the generator set.

[0022] The first terminal, the second terminal, the third terminal and the fourth terminal on the excitation controller 1 are respectively connected to the positive pole of the power supply, the bottom terminal of the excitation controller 1 is connected to the negative pole of the power supply, the rear side of the excitation controller 1 is connected to the measurement and control device 2, one side of the measurement and control device 2 is connected to the server 3, the measurement and control device 2 serves as an intermediary between the server 3 and the excitation controller 1, receives instructions from the server 3 and transmits them to the excitation controller 1, collects the operation data of the excitation control system and transmits them to the server 3, improves the accuracy and real-time performance of data collection, facilitates monitoring and analysis, and provides stable signal transmission through hardwiring and communication lines to enhance the reliability of the system. The server 3 is connected to the monitoring master station 4, and the overall monitoring is carried out in the monitoring master station 4, and the control of excitation is realized through the server 3 and the measurement and control device 2. The positive pole of the power supply is connected to the two contacts at the top of the de-excitation switch 5 in two ways, one of which is provided with a first normally open switch K00, which is in a normally open state under normal circumstances, ensuring that the current can freely flow through the other way to the de-excitation switch 5. The first normally open switch K00 can switch the flow direction of the power supply or cut off the power supply, thereby realizing the de-excitation function of the overall system. The two contacts at the bottom of the de-excitation switch 5 are connected to the negative pole of the power supply. The function of the de-excitation switch 5 is to cut off the excitation power supply of the generator set when needed to reduce the excitation current and avoid over-excitation or under-excitation. The top contact is connected to the positive pole of the power supply to receive power supply, and the bottom contact is connected to the negative pole of the power supply to form a complete loop with the power supply.

[0023] Now let's talk about the specific design of the above key components:

[0024] The measurement and control device 2 is internally provided with switches K1, K2, K3, K4, K5 and K6. The rear ends of switches K1, K2, K3 and K4 are connected in parallel, meaning that different current paths can be independently controlled without interfering with each other. These switches are used to control different excitation functions such as excitation, de-excitation, magnetic enhancement and magnetic reduction, etc., to ensure that the generator set can be dynamically adjusted according to actual conditions. The rear ends of switches K5 and K6 are connected in parallel, and switches K5 and K6 use the same control logic to achieve flexible control of relays and loads.

[0025] The first terminal is connected to the positive pole of the power supply after connecting the button SB1 and the normally closed switch K031, and then connected to the rear end of the switch K1. The second terminal is connected to the positive pole of the power supply after connecting the button SB2 and the normally closed switch K032. The third terminal is connected to the positive pole of the power supply after connecting the knife switch QK1 and the normally closed switch K033. The fourth terminal is connected to the positive pole of the power supply after connecting the knife switch QK2 and the normally closed switch K034.

[0026] The front end of the switch K1 is connected to the normally open switch K031 and then to the first terminal, the front end of the switch K2 is connected to the normally open switch K032 and then to the second terminal, the front end of the switch K3 is connected to the normally open switch K033 and then to the third terminal, and the front end of the switch K4 is connected to the normally open switch K034 and then to the fourth terminal.

[0027] The rear end of the switch K5 is connected to the positive pole of the power supply, and then the knife switch QK3 and the relay K03 coil are connected from the positive pole of the power supply to the negative pole of the power supply. The two ends of the relay K03 coil are connected in parallel with the relay K04 coil. The front end of the switch K5 is connected to the normally open switch K041, the normally closed switch K01 and the relay K01 coil, and then connected to the negative pole of the power supply. The front end of the normally closed switch K01 is connected to the button SB3 and the normally closed switch K041, and then connected to the positive pole of the power supply.

[0028] The front end of the switch K6 is connected to the normally open switch K042 and the relay K02 coil and then connected to the negative pole of the power supply. The front end of the relay K02 coil is connected to the button SB4 and the normally closed switch K042 and then connected to the positive pole of the power supply.

[0029] The two adjacent contacts at the top of the demagnetization switch 5 are connected to each other via a normally open switch K01, and the two adjacent contacts at the bottom of the demagnetization switch 5 are connected to each other via a second normally open switch K02. Normally, the normally open switch K01 is in the open state. During normal operation, current cannot directly enter the excitation circuit through these two contacts. The introduction of the normally open switch K01 provides an additional control point. The power supply can be switched on or off by activating K01 remotely or manually, allowing operators to achieve precise control when necessary, increasing system flexibility. The two adjacent contacts at the bottom are connected via a second normally open switch K02. Similar to the normally open switch K01, the second normally open switch K02 is also in the open state under normal circumstances to prevent the formation of a current loop. K02 provides another control interface with the same design logic as K01, which can achieve further control of the demagnetization process. Through the second normally open switch K02, the operator can choose to switch the direction of the power flow and control the excitation circuit when necessary.

[0030] The server 3 communicates with the measurement and control device 2 of each generator set through an optical cable. The measurement and control device 2 of each unit is connected to the excitation controller 1 of the unit through hard wiring and communication lines. In this way, data upload between the excitation controller 1 and the server 3 is realized, and the excitation system of each generator set can be monitored at the monitoring master station 4.

[0031] Normally, the knife switch QK2 is cut to the remote position, the coils of the relay K03 and the relay K04 are powered and attracted, at this time, all the normally open switches of the relay K03, the normally open switch K031, the normally open switch K032, the normally open switch K033, the normally open switch K034, and all the normally open switches of the relay K04, the normally open switch K041, the normally open switch K042 are closed, the switches K1-K6 of the measuring and controlling device 2 are connected with the on excitation switch 5, the off excitation switch 5, the increase excitation switch 5, the decrease excitation switch 5, the on-off excitation switch 5 of the excitation controller 1, so that the control of the excitation can be realized through the server 3 and the measuring and controlling device 2 of the monitoring master station 4.

[0032] If the on-site control of the excitation controller 1 is needed, the knife switch QK2 is only cut to the on-site position, the coils of the relay K03 and the relay K04 are not powered, the normally closed points are closed and the normally open points are opened, all the normally closed switches of the relay K03, the normally closed switch K031, the normally closed switch K032, the normally closed switch K033, the normally closed switch K034, and all the normally closed switches of the relay K04, the normally closed switch K041, the normally closed switch K042 are closed, the on excitation switch 5, the off excitation switch 5, the on-off excitation switch 5, the increase excitation switch 5, the decrease excitation switch 5 of the excitation controller 1 can be operated through the buttons SB1, SB2, SB3, SB4 and the knife switch QK3 on the site.

[0033] The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolt, rivet and welding in the prior art, the machinery, parts and equipment adopt the conventional type in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, which will not be described in detail here, and the contents not described in detail in the description belong to the prior art known to the person skilled in the art.

[0034] The above is only a preferred embodiment of the utility model, and does not limit other forms of the utility model, any person skilled in the art can change or modify the equivalent embodiments applied to other fields by using the disclosed technical content, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the utility model without departing from the technical scheme content of the utility model still belongs to the protection scope of the technical scheme of the utility model.

Claims

1. A centralized excitation control system for a small waste heat and waste pressure generator set, characterized in that: It includes an excitation controller, wherein the first terminal, the second terminal, the third terminal and the fourth terminal on the excitation controller are respectively connected to the positive pole of the power supply, the bottom terminal of the excitation controller is connected to the negative pole of the power supply, the rear side of the excitation controller is connected to the measurement and control device, one side of the measurement and control device is connected to the server, and the server is connected to the monitoring main station. The positive pole of the power supply is connected to the two contacts at the top of the demagnetization switch in two ways, one of which is provided with a first normally open switch K00, and the two contacts at the bottom of the demagnetization switch are connected to the negative pole of the power supply.

2. The centralized excitation control system for a small waste heat and waste pressure generator set according to claim 1, characterized in that: The measurement and control device is internally provided with switches K1, K2, K3, K4, K5 and K6. The rear ends of switches K1, K2, K3 and K4 are connected in parallel, and the rear ends of switches K5 and K6 are connected in parallel.

3. The centralized excitation control system for a small waste heat and waste pressure generator set according to claim 2, characterized in that: The first terminal is connected to the button SB1 and the normally closed switch K031 and then to the positive pole of the power supply, and then from the positive pole of the power supply to the rear end of the switch K1. The second terminal is connected to the button SB2 and the normally closed switch K032 and then to the positive pole of the power supply. The third terminal is connected to the knife switch QK1 and the normally closed switch K033 and then to the positive pole of the power supply. The fourth terminal is connected to the knife switch QK2 and the normally closed switch K034 and then to the positive pole of the power supply.

4. The centralized excitation control system for a small waste heat and waste pressure generator set according to claim 3, characterized in that: The front end of the switch K1 is connected to the normally open switch K031 and then to the first terminal, the front end of the switch K2 is connected to the normally open switch K032 and then to the second terminal, the front end of the switch K3 is connected to the normally open switch K033 and then to the third terminal, and the front end of the switch K4 is connected to the normally open switch K034 and then to the fourth terminal.

5. The centralized excitation control system for a small waste heat and waste pressure generator set according to claim 4, characterized in that: The rear end of the switch K5 is connected to the positive pole of the power supply, and then the knife switch QK3 and the relay K03 coil are connected from the positive pole of the power supply to the negative pole of the power supply. The two ends of the relay K03 coil are connected in parallel with the relay K04 coil. The front end of the switch K5 is connected to the normally open switch K041, the normally closed switch K01 and the relay K01 coil, and then connected to the negative pole of the power supply. The front end of the normally closed switch K01 is connected to the button SB3 and the normally closed switch K041, and then connected to the positive pole of the power supply.

6. The centralized excitation control system for a small waste heat and waste pressure generator set according to claim 5, characterized in that: The front end of the switch K6 is connected to the normally open switch K042 and the relay K02 coil and then connected to the negative pole of the power supply. The front end of the relay K02 coil is connected to the button SB4 and the normally closed switch K042 and then connected to the positive pole of the power supply.

7. The centralized excitation control system for a small waste heat and waste pressure generator set according to claim 6, characterized in that: The two adjacent contacts at the top of the demagnetization switch are connected to each other through a normally open switch K01 , and the two adjacent contacts at the bottom of the demagnetization switch are connected to each other through a second normally open switch K02 .

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