I. Analysis of power consumption characteristics of industry users
The food and beverage industry can be subdivided into the agricultural and non-staple food processing industry (including grain milling, feed processing, vegetable oil processing, slaughter and meat processing, fruit and vegetable processing, etc.), food manufacturing (including baked goods manufacturing, convenience foods) according to the national production industry. Manufacturing, canning, etc.), beverage manufacturing (including wine production, soft drink manufacturing, etc.).
Agricultural and sideline products processing processes are mainly: raw materials - slaughter - cooling - cutting - processing - processing - cooking - cooling - sterilization - freezing - packaging - storage.
Canned fruit and vegetable processing production process are mainly: cleaning - pre-treatment - pre-cooling - quick-freezing - canning - sealing - sterilization - rub pot - storage.
The electricity consumption characteristics of the industry are mainly pipeline operations; the operation of refrigeration equipment is continuous; the seasonal electricity consumption of fruits and vegetables food production is significant; the demand for electricity during export-oriented and contractual periods is strong.
Food and beverage industry user equipment classification
category
Major equipment
Note
Non-productive load
Office lighting, office air conditioners, office equipment (computers, printers, etc.), dormitory lighting, dormitory air conditioners, cafeteria lighting, cafeteria air conditioning, canteen electrical equipment (steamed rice cookers, ovens, freezers, etc.), landscape lighting.
general
Auxiliary production load
Production of lighting, air conditioning, fans and other equipment; cleaning fans, pumps, washing machines and other cleaning equipment; wipe cans, conveyors, packaging machines and other packaging storage equipment.
general
The main productive load
Sorter, elevator, slicer, dicer, shaker, processor, rinsing machine, conveyor, mill and other pre-processing equipment; seasoning machine, meat grinder, filling machine, dryer, cooking machine, electricity Oven, crane, wheat and other processing equipment; fluidized bed, ammonia, refrigerants, thawing library, freezers, refrigerators, pumps and other refrigeration equipment; coder, vacuum pump, sealing machine and other canning sealing equipment; Sterilization circulation pumps, air compressors and other sterilization equipment.
important
Safeguarding load
Refrigerator, refrigerator, etc.
Important, about 20 to 30% of the total load.
II. Analysis of industry users' participation in peak load limitation
1. The large- and medium-sized enterprises in this industry are basically operating in three shifts for 24 hours in a row, and the power load is relatively stable. The peaks and troughs are not much different. Small-scale enterprises are mainly based on one shift, and the general production time is from 8:00 to 17:00. According to the production situation, the industry will adjust flexibly.
2. Because the industry is an important industry that affects people's livelihood, generally, after the grid power supply and use situation enters a serious level, the industry participates in peak load shifting and power cuts.
3. The industry's ability to urgently shift peaks is weak. In the case of emergency peak load limiting, equipment suitable for participation in power cuts is mainly non-productive loads such as office, lighting, and air conditioning, as well as auxiliary production loads such as cleaning, packaging, and storage.
4. The industry is more suitable for participating in phase-shifting and peak-reduction power cuts, but it must ensure the equipment load of freezing and storage.
Third, the industry users involved in the peak load limiting technology program
(I) Gap Level IV Participation Plan
Phase-change peak
Taking into account the user characteristics of the industry, first of all to advocate users to save electricity:
1) It is forbidden to turn on the lights in hallways, passages, bathrooms and other places where natural lighting is better;
2) The office lighting shall be on one stop; the indoor air temperature shall be higher than 30°C to turn on the air-conditioner, and the air-conditioning temperature shall not be set lower than 28°C;
3) Reduce the standby time of office equipment: Office equipment mainly includes computers, printers, fax machines, copiers, and drinking fountains. After the work is completed, all electrical equipment in the office shall be closed in time to prevent the office electrical equipment from being in the standby state.
4) Turn off landscape lighting.
2. Emergency peak shift
During the period from 8:00 to 22:00, non-productive loads such as lighting, office air conditioning, and office loads are reduced; non-productive loads such as lighting, office air conditioning, office load, and landscape lighting are suspended from 18:00 to 22:00.
(II) Gap Level III Participation Plan
Phase-change peak
On the basis of the implementation of the IV-grade plan, production of lighting, air-conditioning, fans, cleaning (washing fans, pumps, washing machines, etc.), packaging storage (cans cleaners, conveyor belts, packaging machines, etc.) and other auxiliary production loads will be suspended.
2. Emergency peak shift
On the basis of the implementation of the IV-grade plan, production of lighting, air-conditioning, fans, cleaning (washing fans, pumps, washing machines, etc.), packaging storage (wiping machines, conveyor belts, packaging machines, etc.) and other auxiliary production loads will be stopped.
(III) Level II Participation Scheme for Gap
Phase-change peak
On the basis of the implementation of the Grade III program, reduce or disable the pre-treatment (classifier, elevator, slicer, dicer, vibrating screen, processor, rinser, conveyor, mill, etc.), processing (seasoning Machines, meat grinders, filling machines, dryers, cooking machines, electric ovens, cranes, wheat making machines, etc.), canning seals (coders, vacuum pumps, sealers, etc.), sterilization (sterilization circulating pumps, air Press, etc.) and other production loads.
2. Emergency peak shift
Continue to implement the Level III program.
(IV) Gap Level I Participation Plan
Phase-change peak
On the basis of the implementation of the Level II program, all the pre-treatments (classifiers, hoists, slicers, dicing machines, vibrating screens, processors, rinsing machines, conveyor belts, mills, etc.), processing (adjustment , meat grinder, filling machine, dryer, cooking machine, electric oven, crane, wheat making machine, etc.), canning sealing (coder, vacuum pump, sealing machine, etc.), sterilization (sterilization circulation pump, air pressure Machine, etc.) and other production loads.
2. Emergency peak shift
Continue to implement the Level III program.
Fourth, the industry users involved in the peak load shifting risk and precautions
There is basically no security risk involved in this industry's participation in the peak load shift, but due to the particularity of the products in this industry, the power outage time of the refrigeration equipment is within one hour, and any process interruption in the assembly line will cause the backlog of intermediate products in the upper and lower processes to force the entire The production stops and the raw materials and intermediate products will be degraded during the production period, resulting in product quality that does not meet the standards and the products are scrapped.
Therefore, when the industry participates in peak-to-peak power cuts, enterprises should, according to their own actual conditions, formulate internal emergency plans scientifically and reasonably, actively cooperate with the peaks and limit the implementation of electricity, and make preparations in advance to minimize losses.
V. Functions and Applications of Intelligent Power Monitoring
5.1 Project Introduction
Zhengzhou Dingjin Foods is a beverage company established by Master Kong Holding Company in Zhengzhou. With a total investment of US$40 million and a registered capital of US$18 million, the company is mainly engaged in the production and sales of the Master Kong beverage series. Has a 0.4KV power distribution room, 4 transformers single power supply. Zhengzhou Dingjin Foods Co., Ltd. and Henan Power Company Zhengzhou Power Supply Company signed a power supply agreement. The company's power supply and distribution project was entirely designed and completed by Henan Yuyuan Power Engineering Design Co., Ltd. The detailed power supply and distribution circuit information is: 4 0.4kV low-voltage inlet loops, 8 capacitance compensation loops, and 83 0.4kV low-voltage outlet loops.
5.2 Network Structure
On-site 0.4KV power distribution room, 4 transformers single-supply power supply, 4 0.4kV low-voltage inlet loops, 8 capacitance compensation loops, and 83 0.4kV low-voltage outlet loops. This project is equipped with 8 serial port servers, with 5 fieldbuses, and each bus connects 15-25 meters.
5.3 System Functions
5.3.1 A System Diagram
The power monitoring system data collector collects on-site power monitoring instrument data and displays it on the system at a time. As shown in the figure below, the three-phase current, three-phase voltage, active power, reactive power, power factor, active energy and other electrical parameters of each circuit are refreshed and displayed in real time, which can directly reflect the operating conditions of the system's input and output lines.
Sixth, the main monitoring products
(1) ACR330ELH meter for high voltage circuit or low voltage circuit
The meter is a power quality analyzer. The main functions are: LCD display, all-electric parameter measurement (U, I, P, Q, PF, F, S); four-quadrant energy metering, multi-rate energy statistics; THDu, THDi, 2-31 times each harmonic wave component; Voltage crest factor, telephone waveform factor, current K factor, voltage and current unbalance degree calculation; Grid voltage and current positive, negative, zero sequence component (including negative sequence current) measurement; 4DI+ 3DO (DO3 overvoltage, undervoltage, overcurrent, unbalance alarm); RS485 communication interface, Modbus protocol or DL/T645 protocol. Dimensions: 120 × 120mm, opening size: 108 × 108mm. Suitable for high pressure important circuit or low voltage inlet cabinet.
(2) ACR220EL power meter with low voltage contact or outlet loop
The main functions of the table are: LCD display, all-electric parameter measurement (U, I, P, Q, PF, F); four-quadrant energy metering, multi-rate energy statistics, maximum demand statistics; 4DI+2DO; RS485 communication interface , Modbus protocol. Dimensions: 96 x 96mm, opening size: 88 x 88mm. Suitable for low-voltage connection cabinets and outlet cabinets.
(3) Low voltage outlet cabinet selection ARD series
The meter measures protection functions such as three-phase current, fixed value query, fixed value setting, overload, phase failure (unbalance), locked rotor, underload, external fault, blocking, undervoltage, 8DI+4DO, power management, and leakage protection , SOE records, a variety of start mode, RS485 communication interface, MODbus protocol / Profibus-DP protocol optional.
(4) Energy-saving product optional rail table or APF active filter device
Lighting box DDSF1352 meter main functions: current specification 1.5 (6) A, 5 (20) A, 10 (40) A, 20 (80) A optional, multi-rate energy statistics, energy pulse output, RS485 communication interface, Modbus Protocol or DL/T 645 protocol optional. Dimensions: 76 x 89 x 74mm, 4 modules. Suitable for lighting box current, voltage measurement; single-phase energy metering.
ARD
DTSF1352 rail meter main functions: current specification 1.5 (6) A, 5 (20) A, 10 (40) A, 20 (80) A optional, multi-rate energy statistics, energy pulse output, RS485 communication interface, Modbus Protocol or DL/T 645 protocol optional. Dimensions: 126 × 89 × 74mm, 7 modulus. Three-phase energy metering for lighting boxes.
DTSD1352 rail type meter main functions: LCD display, all-electric parameter measurement (U, I, P, Q, PF, F, S); four-quadrant energy metering, multi-rate energy statistics, maximum demand statistics; current specification 1.5 ( 6) A, 5 (20) A, 10 (40) A, 20 (80) A optional, RS485 communication interface, Modbus protocol or DL/T 645 protocol optional. Dimensions: 126 × 89 × 74mm, 7 modulus. Suitable for power cabinets.
ANAPF series active power filter devices are connected to the power grid in parallel and detect harmonics and reactive components of the load in real time. PWM inverter technology is used to generate one current harmonic component and reactive component from the converter. The inversion component is injected into the power system in real time, so that harmonic control and reactive power compensation are realized.
Seven, equipment list
No.
name
Model, specification
unit
Quantity
Note
1
Power Meter
Network Power Meter
ACR330ELH
only
100
Ankerui
Three-phase rail mounted energy meter
DTSD1352-C
only
68
Ankerui
Open type current transformer
AKH-0.66/K
only
192
Ankerui
2
Monitoring Center duty room
Console
YT-341
set
1
Xianghe
Workstation host
IPC-610L/769VG/E5300/2G/500G/DVD/88 Mini Key+Mouse (Original Machine Standard) 2 Serial Ports
station
1
Advantech
monitor
L197WA
station
1
Lenovo
UPS power supply
C1K/1KVA
station
1
SANTAK
printer
HP 1108 A4 format
station
1
HP A
system software
Genuine Microsoft WINDOWS XP/SP3
set
1
Microsoft A
Industrial network switch
D-LINK 16 ports
station
1
D-LINK
Industrial Serial Server
NPORT5232I RS485 interface × 2 with light isolation
station
4
MOXA
Industrial switching power supply
KDYA-DG30-24K
only
4
Huali
Power Management Software
System Configuration Software Acrel-3000V6
set
1
Ankerui
Power Management Software
Data Storage Software Acrel-dbSQL
set
1
Ankerui
Power Management Software
Energy Management Software Acrel-EnerSys
set
1
Ankerui
Power Management Software
Device Driver Software Acrel-Driver
set
1
Ankerui
Photoelectric converter
Single mode photoelectric conversion HTB-1100S(25km)
only
8
3
Engineering Materials
Communication cable
Single-mode 4-core fiber
km
2
Communication cable
Shielded twisted pair RVVSP 2*0.75
km
0.2
Sail
Communication cable
BVR 1.5mm
km
4
Engineering materials
Towboards, conversion lines, lines, signs, etc.
set
1
Measuring box
A total of 4 units are required to be installed in each substation.
only
4
Fiber Optic Accessories
Includes welding, pigtails, flanges, jumpers, etc.
set
4
4
Construction and commissioning
Communication cable laying
Meter
2200
Comprehensive debugging
People/day
25
Equipment transportation costs
item
1
training fees
item
1
Construction renovation costs
item
1
references:
[1] Ankerui Electric Co., Ltd. System Solution, 2013.1.
[2] Food and Beverage Industry Peaking and Power Limiting Technical Guidance
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