Xiamen Jixu Trading Co., Ltd.

Price is not the problem==========The problem is that you need to ask me for price=====If you make the inquiry, you can negotiate and agree to reduce the price of the goods.
Installation and use ============= Instructions for use ========= Instructions and detailed information ====== Complete information
Industrial communication equipment == =====Industrial Ethernet======This product is rich and diverse====Gorgeous to please
Pursue excellence===========Integrity service======Discontinued spare parts= ========= Large supply
Absolutely guaranteed brand new imported goods = Absolutely guaranteed safe and on-time delivery = Absolutely guaranteed after-sales service quality.
The customer confirms the model of the product required to be purchased = We will prepare a detailed formal quotation process based on the inquiry model, price and delivery date.
The customer orders the product after receiving the quotation and confirming that the model is correct = the person in charge of the quotation drafts a sales contract based on the model and quantity provided by the customer.
After receiving the contract review and approval, the customer will stamp and return it and remit the money to the company's account bank according to the contracted sales volume.
After our company's finance department checks the payment, the salesperson arranges the shipment and notifies the customer to track the waybill.
Xiamen Hangtuo Electric Co., Ltd.
If you need, please call: - or
:
Professional service. Professional attitude. Serving every new and old customer. . . .
Mainly based on the characteristics of various power generation methods and resource conditions, the decision to add what type of power station (hydropower, thermal power, nuclear power, etc.) and the capacity and number of generating units are decided. Power stations that mainly bear base load should choose high-efficiency units suitable for long-term operation, such as nuclear power units and large-capacity and high-parameter thermal power units, due to their high utilization rate, to reduce fuel costs. Power stations that mainly bear peak loads should choose units with short start-up time, ability to adapt to load changes and low investment, such as gas turbine units, due to their low annual utilization rate. As for hydropower units, they should try to be at full capacity during the wet season to bear the base load of the system. During the dry season, the peak load will be due to limited water volume.
Since the cost of hydropower units only accounts for a small part of the total investment in hydropower stations, in recent years there has been a tendency to appropriately increase the installed capacity in hydropower stations that exceeds the guaranteed output (that is, to increase the excess of installed capacity) to avoid abandonment or reduction of water. Abandon water. For qualified hydropower stations, countries around the world are committed to developing pumped storage units, which use the excess power from thermal power plants for pumped storage when the system is at low load, and then use pumped storage hydropower to generate electricity when the system is at peak load. Although the total efficiency of pumping-storage-power generation is only/, overall consideration is to install pumped storage units than to build peaking units, especially for systems with insufficient peaking capacity.
Power grid planning rationally selects the transmission voltage level on the premise of determined power points and load points, determines the network structure and transmission capacity of the transmission line, and then checks the stability, reliability and reactive power balance of the system.
The information and control subsystem in the power system is a neural network that realizes the transmission of information in the power system. It makes the power system observable and controllable to ensure the normal process of electric energy production and consumption as well as emergency handling in accidents. Information and control subsystems have been an indispensable part of the power system since the birth of the power system. Its improvement and development at different levels have made the widespread application of electric energy a reality.
The progress of the power system information and control subsystem ensures the power quality, improves the safe operation level of the power system, improves labor conditions, increases labor productivity, and provides strong support for the power system's business decisions. Conceptually and methodologically, the power system System operation analysis and operation management are given new content.
The main role of the information and control subsystem is to ensure the safe, stable and economical operation of the power system. It performs the following tasks. ①Monitoring and recording of normal operating conditions and normal operations and adjustments (automatic maintenance of frequency and voltage, etc.) ②Alarm, protection, emergency control and accident records under abnormal and accidental conditions ③Operation management to conduct short-term load forecasting and formulate power generation plans to achieve economic dispatch wait.
Composition and operation Since the 1990s, with the development of communication technology and control theory and the application of electronic computers and microelectronics technology, the information and control of power systems have gradually developed in the direction of comprehensive dispatch automation marked by computer networks. The basic composition of the power system dispatch automation computer system is shown in the figure. Various operating information (including switching quantities, analog quantities and digital quantities) are collected from the controlled terminal (power plant, substation), converted and transmitted to the dispatching terminal through the channel (data transmission system), and then the dispatching terminal computer receives the data and processes it. After processing, display monitoring, recording and tabulation, or control decisions are made, and then transmitted to the controlled terminal through the channel for operation and control. Due to the complex structure of the power system and the vast territory, hierarchical and hierarchical dispatch control are generally adopted. Figure is an example of a two-tier control system.
New model D
Control processor,
New features
Better performance
Twice the memory
No more use of hardware identification Symbol
Set the identifier of / through D and its infrared communication port
Other improvements
The application can achieve global time synchronization with millisecond precision
/ Improvement of alarm
/ Types of system input and output components
Model Description Application
Channel-input interface component
Channel-input interface component
Channel-D input interface component
Channel-D input Interface component
Channel thermocouple/millivolt input interface component/
Channel thermal resistor input interface component ()
Channel thermal resistor input interface component ()
Channel thermal resistor Input interface component
Channel-input interface component/
Channel pulse input interface component
Channel voltage input interface component D
Channel D contact input interface component D
Channel D Contact input interface component D
Output readback redundant channel-input/output interface component redundancy/
Channel-input interface component
Channel thermocouple input interface component/
Channel r Communication input interface component input
Channel r Communication output interface component output
Redundant channel r Communication input interface component redundancy/r input
Channel discrete input interface component D
Redundant Channel r Communication output interface component redundancy/r output
Channel voltage input channel discrete output interface component D/D
Channel-D fieldbus interface component D host
Segment dd fieldbus Interface component
Channel serial communication single card port
Channel serial communication redundant component port
Communication single card/r port
Communication redundant single card/r port
Redundant Additional channels - output interface components optional redundancy
Channel voltage input channel discrete output (external power supply) D/D
Channel voltage input channel discrete output (internal power supply) D/D
Channel contact input Channel discrete output (external power supply) D/D
Channel contact input Channel discrete output (internal power supply) D/D
Channel contact output (external power supply) Interface assembly (can Optional redundancy) Optional redundancy D
Channel bidirectional dual baud rate intelligent device interface component
Redundant channel bidirectional dual baud rate intelligent device interface component redundancy