翻译一段文章 谢谢了，急用

Since the 80's, along with the computer technology fast development,the domestic electronic technology, the electronic productsreliability unceasingly have enhanced, through use 电液 the controltechnology, the development develop the successful numeral 电液control system (DEH), presently widely apply in the thermal power, thenuclear electricity steam turbine domain. The DEH application, greatlyenhanced the steam turbine control system control performance, thereliability and the stability far surpasses the hydraulic controlsystem. But the cable telegram adjusts a frequency modulation functioncannot satisfy the maintenance "the island movement" the request. Theaccident result often is the small net frequency large undulation, thefinal frequency collapses, entire factory power cut. These powerplants loads often are to the electric power quality requirement quitehigh process unit, the frequency undulation and the electric powerlose can create the production the heavy loss, even expensiveequipment discarding. This article in view of this kind of electrical network accident,carries on the supplement and the consummation to the existing DEHfunction, proposed the question which in the numeral 电液 controlsystem DEH foundation, uses the power load balancing control (PLU), afrequency modulation, two frequency modulations, quickly does notreduce assigns which and so on to unify the method solution belt smallnet and the factory uses electricity, the process simulationexperiment and the scene confirmation, has realized the islandmovement, has satisfied time the FCB performance requirement.

This article has first made the overall introduction in theintroduction to the small net movement, then introduced the small netmoves when the power and the frequency system structure, the controlprinciple, and proposed the question, introduced author's main work.

In the 2nd chapter, in detail introduced a frequency modulationstochastic process analysis.

In the 3rd chapter, mainly introduced electrical power systemcomprehensive frequency characteristic and so on, and has produced thesmall net movement concrete realization principle in behind.

In the 4th chapter, mainly introduced DEH, the DCS system, and hasstudied in a this system frequency modulation principle as well as thecontrolled process.

In the 5th chapter, first carries on the analysis to the islandmovement plan, establishes the object the mathematical model, andcarries on the simulation with MATLAB, has produced the correspondingresult. Finally utilizes to the practice, and obtains the certainsuccess.

Finally, summarized the achievement which the full text content aswell as obtains, and proposed the improvement program.