CN209929976U

CN209929976U - Papermaking is with electric load regulation and control system of self-contained power plant

Info

Publication number: CN209929976U
Application number: CN201920817796.8U
Authority: CN
Inventors: 陈发生; 贾少军; 黄秀辉; 贾金成
Original assignee: Fujian Liansheng Paper Co Ltd
Current assignee: Shanying South China Paper Co., Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2020-01-10
Anticipated expiration: 2029-05-31

Abstract

The utility model relates to an electrical load regulation and control system of a self-contained power plant for papermaking, which comprises more than two generator sets, more than two loads and a low-cycle load shedding device, wherein the more than two generator sets respectively supply power for the more than two loads, and a power switch is arranged between the load and the generator sets; the low-cycle load shedding device is arranged between the generator set and the load, an external power grid is connected with the load through the low-cycle load shedding device, and the generator sets are connected with the external power grid in parallel; and the low-cycle load shedding device controls the disconnection sequence of the loads according to the abnormal condition of the generator set or an external power grid. Different prior art, the utility model discloses can comb each production line system power line cloth accuse condition through low week load reduction device, formulate and set up the production line and get rid of the precedence order of load.

Description

Papermaking is with electric load regulation and control system of self-contained power plant

Technical Field

The utility model relates to a papermaking technical field, in particular to papermaking is with electric load regulation and control system of self-contained power plant.

Background

With the increase of paper demand in the market, the paper making quantity of a paper making factory is further improved along with the demand of customers, the electricity utilization safety of a paper making production system becomes a restriction factor of the quality and the yield of paper making products, and finally the overall economic benefit of a paper making enterprise is also influenced. In the prior art, more than two generator sets of a papermaking self-contained power plant are connected to generate power in a grid mode, the generated energy of the more than two generator sets and part of electric quantity purchased from an external power grid can meet the requirements of the power consumption of a papermaking production line and the self-power consumption of the self-contained power plant, and an internal power grid maintains a balanced state during normal production.

When one generator set is abnormally tripped or an external line system is in fault, accidents of overload tripping and self-power interruption of other running generator sets can be caused. The production of each process of the production system is unbalanced due to the disordered power failure accident, the production yield and the quality are influenced, and meanwhile, the economic benefit is also related.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide an electrical load regulation and control system of a self-contained power plant for papermaking, which is used for solving the technical problems in the prior art.

In order to achieve the above object, the inventor provides a system for regulating and controlling an electrical load of a self-contained power plant for papermaking, comprising:

more than two generator sets;

the power supply system comprises more than two loads, more than two generator sets respectively supply power to the more than two loads, and a power switch is arranged between each load and the corresponding generator set; and

the low-cycle load shedding device is arranged between the generator set and the load, an external power grid is connected with the load through the low-cycle load shedding device, and the generator sets are connected with the external power grid in parallel;

the low-cycle load shedding device is connected with and controls the operation of the loads, and controls the disconnection sequence of the loads according to the abnormal condition of the generator set or an external power grid.

As a preferred structure of the utility model, the low frequency load shedding device includes the current detection module, the current detection module is used for detecting each respectively the real-time current of load.

As a preferred structure of the utility model, the low frequency load shedding device still includes electric current judgement module, electric current judgement module with the electric current detection module is connected, electric current judgement module is used for receiving the data of electric current detection module transmission, and be used for judging each whether the real-time electric current of load surpasses the default.

As a preferred structure of the utility model, the low-cycle load shedding device still includes load disconnection execution module, load disconnection execution module with the electric current judgement module is connected, load disconnection execution module and each the switch of load is connected, according to the data control that the electric current judgement module sent each the precedence of load disconnection.

As a preferred structure of the utility model, the papermaking still includes two or more switch button from the electrical load regulation and control system of power plant, switch button connects and controls switch.

Different from the prior art, the technical scheme is that the low-cycle load shedding device is arranged between the generator set and the load, the external power grid is connected with the load through the low-cycle load shedding device, and the generator sets are connected with the external power grid in parallel; the low-cycle load shedding device is connected with and controls the operation of the loads, and controls the disconnection sequence of the loads according to the abnormal condition of the generator set or an external power grid. Therefore, the power line distribution and control conditions of all production line systems can be combed through the low-cycle deloading device, and the load shedding sequence of the production lines is formulated and set. When the generator set of the self-contained power plant trips due to faults, the electric load of the papermaking production line is thrown away in sequence, so that the safe operation of the main production system equipment is ensured. When the external line system trips due to faults, the power load is adjusted and controlled in time, and the power safety of the main papermaking production system and the self-supply power of the self-supply power plant and the continuous and stable production of the papermaking production system are effectively guaranteed. Accidents such as overload protection tripping of a generating set of a self-contained power plant, self-contained power interruption of the self-contained power plant and the like caused by overlarge lifting of the power load are avoided.

Drawings

FIG. 1 is a system block diagram of an electrical load regulation system of a self-contained papermaking plant according to an embodiment;

FIG. 2 is a schematic control diagram of a load according to an embodiment;

FIG. 3 is a block circuit diagram of a low cycle load shedding apparatus according to an embodiment;

fig. 4 is a schematic circuit diagram of a low-cycle load shedding device according to an embodiment.

Description of reference numerals:

1. a generator set is arranged on the power supply unit,

2. the load is applied to the workpiece to be processed,

3. a power switch is arranged on the base plate,

31. a power switch button is arranged on the base plate,

4. the low-cycle load-shedding device is provided with a low-cycle load-shedding device,

41. a current detection module for detecting the current of the power supply,

42. a current judging module for judging the current of the power supply,

43. a load disconnection performing module for performing a load disconnection,

6. an external power grid.

Detailed Description

To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.

In the description of the present application, unless explicitly stated or limited otherwise, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, including two, unless specified or indicated otherwise; the terms "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, integrally connected, or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described with reference to the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.

Referring to fig. 1 to 2, the present embodiment relates to a system for regulating and controlling an electrical load 2 of a self-contained power plant for papermaking, which includes more than two generator sets 1, more than two loads 2 and a low-cycle load shedding device 4, where the more than two generator sets 1 respectively supply power to the more than two loads 2, a power switch 3 is disposed between each of the loads 2 and the generator sets 1, the low-cycle load shedding device 4 is disposed between each of the generator sets 1 and the load 2, an external power grid 6 is connected to the load 2 through the low-cycle load shedding device 4, and each of the generator sets 1 is connected in parallel to the external power grid 6; the low-cycle load shedding device 4 is connected with and controls the operation of the loads 2, and the low-cycle load shedding device 4 is used for controlling the disconnection sequence of the loads 2 when the generator set 1 or the external power grid 6 is abnormal.

In a specific embodiment, the self-contained power plant for papermaking has three generator sets 1 for grid-connected power generation, the generated energy of the three generator sets 1 and part of electric quantity purchased from an external power grid can meet the requirements of the power consumption of a papermaking production line and the self-electricity consumption of the self-contained power plant, and an internal power grid maintains a balanced state during normal production. When one generating set 1 is abnormally tripped or an external line system is in fault, accidents of tripping overload 2 and self-power interruption of other running generating sets 1 can be caused. In the prior art, the sequence of the load shedding 2 of each production system is established and set according to the safety requirement of power failure of the production line and the balance accounting of production cost after production stoppage, and the normal operation of important equipment cannot be ensured if the load 2 is randomly switched off in a disordered way through a conventional low-cycle load shedding device 4.

This embodiment can realize getting rid of power consumption load 2 in order fast through addding power control loop on the urgent controlling means of power consumption load 2, has guaranteed the stable continuous production of main production system equipment and self-contained power plant. The production accidents of paper making production line tripping, self-contained power plant generator tripping and comprehensive power loss of the paper mill and the power plant caused by overload 2 can be reduced, and the economic benefit is remarkable.

Optionally, the paper-making self-contained power plant electric load 2 regulation and control system further includes more than two power switch buttons 31, and the power switch buttons 31 are connected with and control the power switch 3. In this way, the load 2 can be manually adjusted and controlled by the power switch button 31, so as to achieve the effect of reducing the load 2.

In the present embodiment, the power switch button 31 is provided on the current monitor screen.

Optionally, as shown in fig. 3 and 4, the low-cycle load shedding device 4 includes a current detection module 41, a current determination module 42, and a load disconnection execution module 43, where the current detection module 41 is electrically connected to the current determination module 42, and the current determination module 42 is electrically connected to the load disconnection execution module 43.

Specifically, the low-cycle deloading device 4 works according to the following principle:

the current detection module 41 is configured to detect real-time currents of the loads 2 respectively.

The current determining module 42 is connected to the current detecting module 41, and the current determining module 42 is configured to receive data transmitted by the current detecting module 41 and determine whether the real-time current of each of the loads 2 exceeds a preset value.

The load disconnection executing module 43 is connected to the current judging module 42, the load disconnection executing module 43 is connected to the power switches 3 of the loads 2, and the disconnection sequence of the loads 2 is controlled according to data sent by the current judging module 42.

In this embodiment, the embodiment of the low-cycle load shedding device 4 and the specific circuit part thereof are not limited to the embodiment in this embodiment, and the low-cycle load shedding device 4 controls the sequence of disconnecting the loads 2 according to the abnormality of the generator set 1 or the external grid 6. Are all within the scope of the present embodiment.

Different prior art, can comb each production line system power line arrangement and control condition through low cycle deloading device 4 in this embodiment, formulate and set up the precedence of production line load shedding 2.

It should be noted that, although the above embodiments have been described herein, the scope of the present invention is not limited thereby. Therefore, based on the innovative concept of the present invention, the changes and modifications of the embodiments described herein, or the equivalent structure or equivalent process changes made by the contents of the specification and the drawings of the present invention, directly or indirectly apply the above technical solutions to other related technical fields, all included in the protection scope of the present invention.

Claims

1. The utility model provides a papermaking is with preparing power plant's electric load regulation and control system which characterized in that includes:

more than two generator sets;

2. The self-contained power plant electrical load regulation system for papermaking according to claim 1, characterized in that: the low-cycle load shedding device comprises a current detection module, and the current detection module is used for respectively detecting the real-time current of each load.

3. The self-contained power plant electrical load regulation system for papermaking according to claim 2, characterized in that: the low-cycle load shedding device further comprises a current judging module, the current judging module is connected with the current detecting module, and the current judging module is used for receiving data transmitted by the current detecting module and judging whether the real-time current of each load exceeds a preset value.

4. The self-contained power plant electrical load regulation and control system for papermaking according to claim 3, characterized in that: the low-cycle load shedding device further comprises a load disconnection execution module, the load disconnection execution module is connected with the current judgment module, the load disconnection execution module is connected with the power switches of the loads, and the disconnection sequence of the loads is controlled according to data sent by the current judgment module.

5. The self-contained power plant electrical load regulation system for papermaking according to claim 1, characterized in that: the papermaking self-prepared power plant electric load regulation and control system further comprises more than two power switch buttons, and the power switch buttons are connected with and control the power switches.