Second, second, the industry users participate in the peak-to-peak power-capacity analysis industry users participate in the peak-to-peak capacity analysis 1. The industry has a large electrical load and is a continuous load, regardless of time, season, climate. 2. The industry's emergency peak-to-peak power cut can quickly stop the load of high-power electrical equipment such as cement mills and raw mills. The emergency peak-breaking capacity is strong, but the kiln load cannot participate in emergency peak-to-peak power cuts. 3. The staged fault peaks of the users in the industry can be carried out by arranging centralized maintenance and production reduction. For example, the centralized maintenance mode is used, and only the maintenance equipment such as the kiln load and some living lights are reserved, and the maintenance is generally about 1000 kW. The load can be used; if the production mode is discontinued, the production line can be gradually stopped to reduce the production load and achieve the peak effect.
Third, third, industry users participate in the peak-to-peak power-limiting technology program industry users participate in the peak-peak power-limiting technology program (1) Gap level IV-level participation program 1. Staged peak: when the peak-shifting instruction is implemented, priority is given to the participation of some cement mills. Wrong peak. Under the premise of completing the peak-to-peak indicator, combined with its own production process, it can selectively release part of the equipment load at different time periods.
2. After receiving the wrong peak command, the emergency peak should be quickly put into the limit load, and the air-conditioning lighting equipment should be arranged preferentially. If the cement mill is not able to meet the requirements, the cement mill will participate in the peak, and then gradually release the load according to the instructions to resume normal production.
(II) Gap level III participation scheme 1. Staged peak: Under the premise of ensuring safety, all cement mills and some raw mills participate in the peak during the peak period on the basis of the implementation of the IV scheme. . Under the premise of completing the peak-to-peak indicator, combined with its own production process, it can selectively release part of the equipment load at different time periods.

Sinoma Pingxiang Cement Co., Ltd. was established in 2008 with a registered capital of 38,861.775 million yuan. It is affiliated to China National Materials Group and specializes in the production and sales of cement. The company currently produces: 32.5 grade composite Portland cement and 42.5 grade Portland cement. The 4,500 t/d clinker production line project of Sinoma Pingxiang Cement Co., Ltd. is located in Lianbu Village, Futian Town, Shangli County, Pingxiang City. The final products are cement and clinker. The project started construction in May 2010 and is scheduled to be completed in September 2011. The static total investment of the project is 280 million yuan. The power supply of the 4500t/d new line of Sinoma Pingxiang Cement is led by the Futian Town Power Supply Bureau to the two-way 110kV power supply line to the new line total substation, and the 2# main transformer of 25000MVA and the 2# main transformer of 31500MVA are stepped down to 10kV and It is distributed to the distribution room of each production line such as kiln head, kiln tail, raw material mill, cement mill and limestone crushing. During the trial operation phase, the new production line was supplied by the old factory. Now the production line is put into operation, the power supply line is operating normally, the 1# main transformer has not been invested, and the 2# main becomes the production and supply of the entire new line. The wiring mode of the new production line 10kV power distribution system is three-phase four-wire, and there is a mother-link between the two incoming lines. A diagram of the total power distribution system is as follows:

In this project, the electrical circuit of each circuit of the substation is realized by installing the ACR320E series multi-function power meter of Ankerui Electric Co., Ltd. on the total drop 10kV switchgear. In addition, Zhuhai Malata uses the same type of instrument panel meter panel in the central control room of the second floor of the total drop to measure the positive active and reactive power of the new line 110kV incoming line, 1#2# main transformer high side and low voltage side. Electricity. In addition, ACR320E series instruments are also installed on the 10kV switchgear of the production line distribution room at the raw material mill, cement mill, kiln head, kiln tail, limestone crushing, etc. The power management system only initially performs the back-end networking of the multi-function meters of the total power distribution room and the central control room, that is, the field equipment layer consists of all ACR320E series instruments in the total power distribution room and the central control room. The field instrument adopts shielded twisted pair RVVSP2*1.0 as the transmission medium of RS485 bus. The number of instrumentation devices attached to each 485 bus does not exceed 20, and the total length of the line does not exceed 100 meters, thus ensuring the stability of the data link. . In this project, 24 instruments are divided into 2 channels, that is, 19 instruments in the power distribution room and 5 instruments in the central control room communicate with the back-end system through a 485 bus.
Because the advanced system is small, the communication management equipment selects the 4-port serial port Jetport5604I produced by Korenix, which can simultaneously integrate 4 RS485 buses with optical isolation. The serial port server is installed in the network cabinet of the central control room, and is connected to the station management layer through the industrial Ethernet TCP/IP protocol. The Ethernet transmission medium is a super five types of STP shielded lines. Industrial network switches are reserved in this project for future system expansion. The main equipment of the station management layer is DELL's workstation, Santak 1KVA tower UPS power supply and HP's A4 format printer, operating system software Windows XP SP3, and power management system software for the Acrel-3000 series. All the equipments in this project use wired connection. The communication network construction is completed before the start of the new line production line. The system commissioning is completed during the trial operation. The power management system was put into operation at the same time in December 2011 with the production line.
5.4 System function data acquisition and management Data collection and management The data acquisition required for power distribution mainly through the ACR320E network multi-function instrument, PT, CT and other devices, will be the operating parameters of the field electrical equipment, including: current, voltage, active power, The remote sensing information such as reactive power, power factor, active power, and the state of the circuit breaker opening and closing are collected. The instrument is connected to the intelligent communication server through the 485 bus, and is connected to the power management host through the Ethernet interface. The ACR320E network multi-function meter adopts the RS485 interface and the MODBUS-RTU communication protocol, and the RS485 adopts the shielded cable twisted pair transmission, and the wiring is simple and convenient; The communication interface is half-duplex communication, and the maximum data transmission rate is 10Mbps. The RS-485 interface is a combination of balanced driver and differential receiver. The anti-noise capability is enhanced. Up to 32 devices can be connected on the bus. The maximum transmission distance is 1.2km.
Information processing information processing Statistics, analysis, and calculation of real-time data collected by the signal acquisition system, and the data is periodically stored. For the same period of electricity units, different power units in the same period of electricity consumption statistics; as a management platform for electricity costs, compared with the actual electricity costs; according to the amount of power generated by mobile oil, the fuel consumption is estimated. Clearly reflect the electricity consumption of all departments of the whole plant, establish a benchmarking department, and compare with the benchmarking department, find the steps of stealing electricity, leakage, long-lighting, and unused equipment power-off; evaluation of energy-saving effects of different energy-saving schemes It is beneficial to select energy-saving measures in a targeted manner, and can also be used as a measurement system for contract energy management projects; the energy report realizes the time-based inquiry of all energy data, which is divided into five types: minute, hour, day and month;
Power summary table, all monitoring equipment power summary, according to the time period query, automatically calculate the power consumption at any time; print and export, all reports and interfaces can be printed, or exported in EXCEL, WORD format; power report shown in Figure 2.

The alarm and control alarm and control alarm prompting and notification module can sort the abnormal data collected by the daily monitoring system management module, and output sound and light, short message, work order, etc. through the hardware support for a certain range of data exceeding the benchmark power. The alarm and alarm query interface is shown in Figure 5. The alarm prompt box displays the time when the alarm occurred, the circuit name, the circuit usage, the data point, the data point description and the alarm content. (If it is an overload alarm, it will also display the current value of the alarm and Set alarm limit)

Sixth, the main monitoring products Six, the main monitoring products ((1 1) high-voltage circuit or low-voltage incoming circuit selection) high-voltage circuit or low-voltage incoming circuit selection ACR330ELHACR330ELH instrumentation This table is a power quality analysis instrument, 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 harmonic components; voltage crest factor, telephone Waveform factor, current K coefficient, voltage and current unbalance calculation; grid voltage 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-voltage important circuit or low-voltage incoming line cabinet.