公开(公告)号：US3928976A

公开(公告)日：1975-12-30

申请号：US47711674

申请日：1974-06-06

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： BRAYTENBAH ANDREW S ,  JAEGTNES KARL O ,  SMITH MILLARD F

IPC: F01D21/00 ,  F01D21/02 ,  F01D21/16 ,  F01D21/20 ,  F01K13/02

CPC classification number: F01D21/02 ,  F01D21/20

Abstract: An electrohydraulic emergency trip system and method, which rapidly closes the steam inlet valves to the turbine in response to one of a plurality of predetermined contingencies that are sensed by redundant devices is disclosed. The system is energized electrically by two independent power sources in a failsafe arrangement, both of which must fail to result in an unwarranted trip. Hydraulically, the system includes first and second trip valve means, both of which must operate to trip the turbine, and each of which are energized by one of the independent power sources. A test and indication panel is provided for selectively testing the response of the system to the occurrence of the predetermined contingencies and includes alarms and indications of system condition. Contingency simulation means are provided for subjecting each of the contingency sensing devices to a respective emergency trip environment during operation and the response of the system thereto without affecting the operational condition being simulated, and permitting the system to remain responsive to a trip contingency.

Abstract translation: 公开了一种电液式紧急跳闸系统和方法，其响应于由冗余设备感测到的多个预定意外事件中的一个而迅速关闭到涡轮机的蒸汽入口阀。 该系统在故障安全装置中由两个独立的电源电气供电，两者都不能导致无理的行程。 在液压方面，该系统包括第一和第二跳闸阀装置，它们都必须工作以使涡轮机跳闸，并且其中的每一个由独立动力源之一激励。 提供测试和指示面板，用于选择性地测试系统对预定意外事件的发生的响应，并且包括系统状况的报警和指示。 应急模拟装置被提供用于在操作期间对每个应急感测装置进行相应的紧急跳闸环境以及系统的响应，而不影响正在模拟的操作条件，并且允许系统保持响应于跳闸应急状态。

公开(公告)号：US3894394A

公开(公告)日：1975-07-15

申请号：US46302774

申请日：1974-04-22

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： BRAYTENBAH ANDREW S ,  JAEGTNES KARL O

IPC: F22B1/06 ,  F01D19/02 ,  F01D21/14 ,  F01K3/18 ,  F01K7/24 ,  F01K9/04 ,  F22B1/16 ,  F22B37/42 ,  G21D3/08 ,  G21D5/06

CPC classification number: F01D19/02 ,  F01K7/24

Abstract: A control system for a high temperature gas cooled reactor (HTGR) power plant is disclosed wherein such plant includes a plurality of steam generators, each deriving heat from a respective circulating flow of reactor coolant gas to supply superheated steam to a common main steam header and reheated steam to a common hot reheat header. Dual turbine-generators are connected to the common headers, a high pressure element of each turbine receiving steam from the main steam header, and an intermediate-low pressure element of each turbine receiving steam from the hot reheat header. Associated with each high pressure element is a bypass line connected between the main steam header and a cold reheat header, which is commonly connected to the high pressure element exhausts. Associated with each intermediate-low pressure element is a first bypass line connected between the hot reheat header and a respective condenser, and a second bypass line connected between the hot reheat header and an alternate steam receiving means such as a secondary condenser or atmosphere. The reactor coolant gas is circulated through each steam generator by an associated helium circulator which is rotated by an auxiliary steam turbine connected between the cold reheat header and the reheater section of the respective steam generator. A control system governs the flow of steam through the first and second bypass lines to provide for a desired minimum steam flow through the steam generator reheater sections at times when the total steam flow through the turbines is less than such minimum, and to regulate the hot reheat header steam pressure to improve control of the auxiliary steam turbines and thereby improve control of the reactor coolant gas flow, particularly following a turbine trip. When the desired steam flow through an intermediate-low pressure turbine is less than the predetermined minimum, the control system governs the flow of steam through the first bypass line so that the combined turbine and bypass steam flow is equal to the predetermined minimum. The steam flow through the second bypass line is controlled to regulate the flow of steam through the first bypass line at a predetermined variable limit value. At times when there is a difference between detected and desired values of hot reheat header steam pressure, the control system reduces such difference by varying the steam flow through one of the bypass lines in proportion to such difference. The steam flow through the second bypass line is varied only when the flow of steam through the first bypass line is at the predetermined variable limit.

公开(公告)号：US3928977A

公开(公告)日：1975-12-30

申请号：US47711774

申请日：1974-06-06

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： BRAYTENBAH ANDREW S ,  JAEGTNES KARL O

IPC: F01D21/00 ,  F01D21/20 ,  F01K13/02

CPC classification number: F01D21/00 ,  F01D21/20

Abstract: An electrohydraulic trip system for closing rapidly the steam inlet valves to a turbine power plant is disclosed. The system includes redundant components for sensing and hydraulically responding to a turbine trip contingency. The hydraulic portion includes two pairs of electrically operable trip valves so arranged that at least one valve of each pair must be operated to trip the turbine. A test switch on the test and indication panel initiates the test by simulating the trip contingency environment for a portion of the redundant sensors and operates the system to open only one pair of the trip valves. During such testing operation, the remaining sensors for the same and other trip contingencies are responsive to open the other pair of trip valves to trip the turbine. The testing of the system can be accomplished for each trip contingency for each portion of the system consecutively. The trip contingencies involving pressure, such as bearing oil and vacuum, for example, are simulated and rendered responsive simultaneously to a real trip contingency by a fluid system that includes means for deviating from operating pressure for testing without actually affecting the operational characteristics of the system being tested, or the capability of the system to respond to an actual deviation in pressure. The electrical portion of the system is switched for testing from a dual system to a split system. With respect to the electrical overspeed contingency, the simulation is transferred from one portion of the system to the other for testing.

Abstract translation: 公开了一种用于快速关闭蒸汽入口阀到涡轮发电厂的电液脱扣系统。 该系统包括用于感测和液压响应涡轮机跳闸应急的冗余部件。 液压部分包括两对电动操作的跳闸阀，其布置成使得每对中的至少一个阀必须被操作以使涡轮机跳闸。 测试和指示面板上的测试开关通过模拟一部分冗余传感器的跳闸应急环境启动测试，并操作系统仅打开一对跳闸阀。 在这种测试操作期间，用于相同和其它跳闸应急的剩余传感器响应于打开另一对跳闸阀以使涡轮机跳闸。