Plans to increase coal-fired power generation in many European countries have had an impact on low power relay prices
The conflict between Russia and Ukraine has exposed and magnified the most vulnerable link in Europe's energy security - its high dependence on imported natural gas. In response to the Russian gas supply cut, Germany, Austria, the Netherlands, France and other European countries have announced the resumption of coal-fired power generation or delay coal withdrawal process. Before the energy crisis, the European Union's coal generation had fallen sharply. Will coal's comeback now undermine the EU's long-term climate goals?
This has been quantified in a recent report from UK-based climate and energy think-tank Ember. The reactivation of coal power in many European countries will lead to an increase in coal-fired power generation in the EU in 2023, but these increases will have a limited impact on European carbon emissions, the report said. In the long term, European countries like Germany remain committed to phasing out coal altogether.
Germany, Austria, France and the Netherlands have recently announced plans to increase coal-fired power generation in order to prioritise pumping as much gas as possible into storage facilities ahead of winter. Ember calculates that 13.5GW of coal-fired power units are now on standby, adding 12% to the eu's installed coal capacity and 1.5% to total electricity capacity. This unit will be switched on in the event of an emergency shortage of gas and will remain on standby at other times.
Most of these backup coal-fired units are located in Germany. Under the alternative power plant Reserve law recently passed by the German parliament, 8.2GW of coal-fired plants are included in the supply reserve -- including 6.3GW of hard coal plants and 1.9GW of lignite plants. Lignite generators will be used when hard coal generators are still insufficient to meet power demand.
The Netherlands has decided to temporarily lift restrictions on coal-fired power generation, amending existing legislation to allow hard coal power plants (4.5GW) to operate at full capacity by the end of 2023.
France will restart its 595MW Emile Huchet 6 coal-fired unit, but only this winter.
Market introduction of low power relay
Industry competition and marketization degree: relay industry development is more mature, the market competition is more sufficient, major producing countries including China, the United States, Japan, Germany, etc., including the United States, Japan, Germany enterprise occupies most of the high-end relay market share, is mainly used in industrial automation control, automotive, communications, aerospace and other fields. The output of relays of Chinese enterprises accounts for about half of the global output of relays, but they are mainly medium and low-end products, which are mainly used in household appliances, electricity, automobiles and other fields.
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Basic principles and classification of low power relay
Basic concept and principle of relay: relay is a control component that automatically disconnects when the input parameters (such as electricity, magnetism, light, heat, sound and so on) in the circuit reach a specified value, which can make the output parameters of the circuit change in a predetermined step. In circuits, relays mainly control, protect, regulate and transmit information. The relay has an induction mechanism that reflects external input parameters, an executive mechanism that realizes "on" and "off" control of the controlled circuit, and an intermediate comparison mechanism that compares, judges and converts the size of the input.
As a control element, relays have the following functions:
(1) Expand the control range, such as multi-contact relay control signal reaches a certain value, according to the different forms of the contact group, at the same time open and close the multi-circuit;
(2) amplification, such as sensitive relay, intermediate relay, etc., with a very small amount of control, can control a large power circuit;
(3) comprehensive signals, such as when multiple control signals are input into the multi-winding relay in a specified form, after comparison and synthesis, to achieve the predetermined control effect;
(4) Automatic, remote control, monitoring, such as the relay on the automatic device and other electrical appliances together, can form a program control circuit, so as to realize automatic operation.
In the competition of the low power relay market, enterprises in the United States, Japan and other developed countries constantly consolidate their dominant position in the global market by establishing technical standards, controlling core technologies, strengthening the integration of industrial chains, and firmly mastering the dominance of technical standards and international rules. In recent years, in order to further strengthen the core competitiveness, enterprises in the United States, Japan and other developed countries continue to expand low power relay products and speed up technology integration. Their business scope has broken through simple relay manufacturing and developed to industrial control, system integration and other fields. The key to the competition in the high-end field has developed from the competition of quantity to the competition of the basic research and development of new relays, key materials, special equipment and other core products.
The raw material of the low power relay
The low power relay cost of relay is mainly determined by raw materials, which are mainly iron, silver, copper and other metals, accounting for about 74.4% of the production cost, labour and manufacturing costs accounting for 13.7% and 11.9% respectively, silver, copper and iron materials accounting for 36%, 21% and 7% of the raw material cost respectively. The price of three raw materials has a certain impact on the profitability of the whole industry. In addition to the main metal raw materials of the low power relay, engineering plastics and enamelled wire are also important components of relays, and the overall supply of raw materials is stable at present.
The application of the low power relay
The rapid development of low power relay emerging relays. The application field of relays has changed from traditional application fields, such as household appliances and power automation control equipment, ships and new energy. Relay products have been transformed from low-end products to high-end products, such as high-voltage DC relay, high-performance industrial control relay, low-power energy-saving relay, new-generation communication relay, high-frequency relay, relay control components and other high-performance relays. The value chain of the relay industry is constantly extending to the high-end. In terms of product performance, it is developing towards the direction of more sensitive (low power consumption), smaller volume and higher performance (such as high-frequency relay).
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, small intermediate relay, solid state relay, temperature control instrument, counter, microcomputer time control switch and other piezoelectric devices. Juzlong took the lead in implementing lean production in the industry and established a small-displacement, multi-batch pull production model with Junlong characteristics.
Based on the operating system of business value stream, the organization forms an information flow control triggering mode from manufacturing end to business order, and builds a stable production management system.
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