IEMMU04模块备件英文使用说明

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协调控制系统设计原则是将汽机、锅炉作为整体考虑。在综合、能量平衡控制策略基础上，通过预测提前量来提高机组负荷响应能力、抑制动态偏差；与各种非线性、方向闭锁等控制机理的有机结合，协调控制机组功率与机前压力，协调处理负荷要求与实际能力的平衡。在保证机组具备快速负荷响应能力的同时，维持机组主要运行参数的稳定。
机组指令的实际能力识别限幅是根据机组运行参数的偏差、辅机运行状况，识别机组的实时能力，使机组在其辅机或子控制回路局部故障或受限制情况下的机组实际负荷指令与机组稳态、动态调节能力相符合。保持机组/电网，锅炉/汽机和机组各子控制回路间需要/可能的协调，及输入/输出的能量平衡。 机组指令的实际能力识别限幅功能，反映了协调控制系统一种重要设计思想——控制系统自适应能力： 1）正常工况——“按需要控制”，实际负荷指令等于目标指令。 2）异常工况——“按可能控制”，目标指令跟踪实际负荷指令。 2.2.RB控制策略
机组主要辅机在运行中跳闸是突发事件，此时若仅靠运行人员操作，由于操作量大、人为因素多，不能确保机组安全运行。因此RB功能是否完善是衡量CCS系统设计的重要指标。  本公司根据多年RB功能设计与工程实践，提出“以静制动、综合协调”的RB控制策略，在众多电厂得到成功实施，并取得良好的经济效益和社会效益。
以静制动——指发生RB工况时，BMS按要求切磨投油，CCS根据RB目标值计算出所需的燃料量后，锅炉主控处于静止状态。
综合协调——指发生RB工况时，协调各子系统以确保运行工况的平衡过渡，汽机主控维持负荷与机前压力关系；在快速减负荷的同时要对某一辅机跳闸引起的运行工况扰动进行抑制，即采用适当的前馈量，以减小RB工况初期影响机组运行稳定的不利因素；对外协调BMS、DEH、SCS控制系统快速、平稳地把负荷降低到机组出力允许范围内。The design principle of coordinated control system is to consider the steam turbine and boiler as a whole. Based on the comprehensive and energy balance control strategy, the load response capacity of the unit is improved and the dynamic deviation is restrained by predicting the advance; It is organically combined with various nonlinear, directional locking and other control mechanisms to coordinate the control of unit power and front pressure, and coordinate the balance between load requirements and actual capacity. Maintain the stability of the main operating parameters of the unit while ensuring that the unit has the ability of rapid load response.
The actual capacity identification limit of the unit command is to identify the real-time capacity of the unit according to the deviation of the unit's operating parameters and the operating conditions of the auxiliary equipment, so that the actual load command of the unit under the local failure or restriction of its auxiliary equipment or sub control circuit is consistent with the steady-state and dynamic energy-saving capacity of the unit. Maintain the required / possible coordination between the unit / power grid, boiler / steam turbine and each sub control circuit of the unit, as well as the energy balance of input / output. The identification and limiting function of the actual capacity of the unit command reflects an important design idea of the coordinated control system - the adaptive capacity of the control system: 1) under normal working conditions - "control on demand", the actual load command is equal to the target command. 2) Abnormal working condition - "control as possible", target command tracks actual load command. 2.2. RB control strategy
The tripping of the main auxiliary equipment of the unit during operation is an emergency. At this time, if only the operator operates, the safe operation of the unit can not be ensured due to the large amount of operation and many human factors. Therefore, the perfection of RB function is an important index to measure the design of CCS system. Based on many years of RB function design and engineering practice, the company proposed the RB control strategy of "static braking and comprehensive coordination", which has been successfully implemented in many power plants and achieved good economic and social benefits.
Static braking refers to that when RB working condition occurs, BMS cuts and grinds oil as required, and CCS calculates the required fuel amount according to the RB target value, and the boiler master control is in a static state.
Comprehensive coordination - when RB working condition occurs, coordinate all subsystems to ensure the balanced transition of operating conditions, and the main control of steam turbine maintains the relationship between load and pressure in front of turbine; At the same time of rapid load reduction, the disturbance of operating conditions caused by tripping of an auxiliary machine shall be restrained, that is, appropriate feedforward quantity shall be adopted to reduce the adverse factors affecting the operation stability of the unit at the initial stage of Rb working condition; Coordinate with BMS, DEH and SCS control systems to reduce the load to the allowable range of unit output quickly and smoothly.