Without testing, there is no way of knowing if the equipment in a substation is properly bonded to the substations grounding mat. Our engineers have completed substation testing and maintenance including power transformers, switchgear from 600 v to 35 kv, overhead and industrial switches, reclosers, relays, breakers and regulators for over 20 different utilities and industrial customers. Periodic testing is necessary to ensure that a protection scheme provides satisfactory performance for many years after being installed, and secondary injection tests may be carried out at suitable intervals to check relays, protection panel, wiring and all secondary equipment performance, during the electrical substation maintenance planning. Substation, switchgear and equipment maintenance and testing. Also, a fault may develop in a transmission line or any other component. We started with an entrance meeting before a substation survey. Commissioning services for equipment rated equal to, or greater than 100 kv, and the protection schemes that directly affect equipment rated equal to, or greater than 100 kv. Solutions for electrical substation maintenance smc. Firstenergy substations must be properly commissioned before being placed in service.
The following list provides some important best practices to consider for substation equipment testing projects. Technical specification 4124 issue 2, november 2018. Aspects of safety as well as the practical and statutory issues. Electrical substation design, testing and commissioning. Substation equipment 42 items knowledge of the properties, operation, and associated symbols of various substation equipment including. Inspection and test procedures for electrical power. Switchgear and switchboard inspection and testing guide.
Operation and maintenance of a gas insulated substation. The test and numerical calculation procedure is presented in section iii. Ena technical specification 4124 issue 2 november 2018 page 4 5. All work to be performed, from routine testing to adding entirely new substations, must be done while keeping the whole system running. The following steps, when put into practice, will ensure a reliable, safe and troublefree substation grounding system.
Transmission, sub transmission and distribution substation 4. Our first product was a computerized, extra high voltage ehv circuit breaker analyzer, which became the forerunner of an entire line of ehv circuit breaker test equipment. Introduction testing and commissioning of electric substation equipment is essential to the start design of a given type of manufactured item. Use load banks instead of the power grid for substation equipment operators must test new utility facilities before they go live. The input for a distribution substation is typically at least two transmission or subtransmission lines. Additionally, complete modular distribution substation configurations for all voltages mod subs are also included, since. Electrical substation equipment for transferring of electrical power from generating unit to distributing units various types of electrical equipment are required. It seemed we had the equipment, but we were missing two key elements of communication and documentation. Electric substations with equipment used to convert highvoltage, extrahighvoltage ehv, or ultrahighvoltage uhv transmission lines to the intermediate voltage subtransmission lines or to switch subtransmission circuits operating at voltages in the range of 34. Center to start a substation predictive maintenance program. When new equipment is to be connected to the system for the first time or where previously in service equipment which has been refurbished and is to be reused, then prior to connection to the system, the equipment shall be electrically tested in accordance with tables 1 6, outlined. The 8501 substation operator knowledge test verbal was designed to assess technical knowledge necessary to perform the substation operator job. Distribution substations michigan technological university. Commissioning services for equipment rated equal to, or greater than 100 kv, and the protection schemes that directly affect equipment rated equal to, or greater than 100 kv are performed by a corporate engineering department.
Secondary equipment and cables tested by independent testing agency and reports approved by ae and submitted to commissioning authority. The function of the substation is to isolate the faulted portion of the system in the shortest possible time. Independent testing agency labels installed on every breaker indicating the breaker has met the testing requirements and trip settings have been set. The equipment shall be delivered completely engineered, fabricated, inspected, tested, and. Substation equipment sizing in equipment sizing of substation here we have taken a case study of sitamahri substation located at mithila, bihar. Ieee std 9981996, ieee guide for direct lightning stroke shielding of substations. Application of predictive diagnostic testing to reduce equipment failures and extend equipment life.
The testing of machine reveals its quality, performance and reliability. You can apply a load where the system is designed to see it under normal operating conditions. When carrying out earth injection testing it is important that telstra are notified so that they can coordinate testing of their own. New construction acceptance testing and existing substation maintenance testing are primary factors in prolonging the life of your electrical equipment and the ongoing reliability of a utilities service to their customers. Due to the great and growing complexity of differential protection schemes, as well as the numerous input and output connections, a large number of parameters must be checked throughout primary and secondary circuits during substation commissioning. All electrical equipment furnished under this substation transformer specification shall be designed, constructed, and rated in accordance with the standards of the ieee, usasi, astm, nema, ansi, and rus. Ieee psrc, wg i25 may 10, 2017 commissioning testing of. Facilities instructions, standards, and techniques. Perform substation equipment testing at each critical point. For high voltage utilityscale systems, you want to deliver enough. Load testing gives you the opportunity to uncover potential problems with your substation equipment and improve system reliability to ensure your customers and facility have consistent power. This bulletin is an update and revision of previous rea bulletin 651, design guide for rural substations revised june 1978. Distribution substation a distribution substation transfers power from the transmission system to the distribution system of an area. For any commissioning testing, make safety top priority wear proper ppe ensure all equipment is deenergized by verifying breaker and disconnect switch statuses ensure all metering values show equipment is deenergized.
Latest diagnostic testing techniques for assessing the condition of substation equipment such as transformers, circuit breakers, load tap changers, switches, and associated equipment. Section iv discusses performance and results of throughfault. Oct 28, 2016 the procedure for the inspection testing of circuit breakers and switches is beyond the scope of this guide as each type and voltage class has its own procedure. Substation criticality ranking criticality ranking tiers equipment ranked by access, consequence, replacement cost, replacement time, redundancy, safety, and environment substations ranked by revenue, redundancy, importance, and reliability maintenance frequency can be based on tier quartile. The fence is connected to a separate grounding conductor. Distribution voltages are typically medium voltage, between 2. The equipment like bus bars, isolator, power transformer etc. Td703,temporary protective grounds for personnel protection in substations, rev.
Ansiieee std 802000, ieee guide for safety in ac substation grounding. All rus borrowers rus electric staff effective date. Substation earth system injection testing swp page 4 of 14 standard work practice sp0510 ver 4 ergon energy corporation limited abn 50 087 646 062 5. Introduction substation commissioning and testing is a critical task prior to substation energization to ensure all equipment will function safely in the intended manner. Substation battery system testing and maintenance batteries are complex electrochemical devices critical to the safe and immediate response of every substation to a fault condition. Practical electrical substation safety for engineers. This 5 day mobilelectrical hands on training program will train engineers, electricians and others how to maintain and test stationary batteries, utilising the latest. Ieee std 4872007, recommended practice for the protection of wireline communication facilities serving electric supply locations. Generally it is done before putting into widespread use or practice. Substations equipment maintenance testing electric. The test will require you to demonstrate your knowledge of performing switching and substation inspection, including. Conduct electrical tests on circuit breakers in accordance with ansineta section 7.
Substation operation and maintenance policy and procedures som sf 6 reference guide f. Electrical substation design, testing and commissioning procedure. Inspection and test procedures section 7 section 7 is the main body of the document with specific information on what to do relative to the inspection and acceptance testing of electrical power distribution equipment and systems. To create a report, at the request of the north american electric reliability corporation nerc system protection and control subcommittee spcs, to serve as an industry reference document on protection system testing practices. Electrical inspection checklists this pdf contains 77 electrical inspection checklists taken from the 2014 electrical inspection manual with checklists.
Industrial tests consulting engineering group leverages the resources of industrial tests extensive library and diverse team of experienced engineers in or call 19166328378. Typically, these earthing switches do not have faultclosing or induced currentinterrupting ability, but are capable of conducting fault current when in the closed position and a small quantity of continuous current for the purpose of testing circuit. Inspection and test procedures for electrical power equipment and systems it is necessary to make an informed judgment for each particular system regarding how extensive a procedure is justified. Testing procedure safety prior to performing the throughfault test, it is important that all safety procedures regarding the switching, locking, and tagging be observed and formalized to avoid protection engineers and technicians from being exposed to substation equipment that has not been properly deenergized. Best practices for protection and control applications for. Type testing is newly electrical system for the first time, considering its size, type of new installation, equipment used, ratings, etc. Design of substation equipment sizing, testing and commissioning. This procedure replaces and supersedes the following procedures in whole or in part, as described in section 3 summary of changes. The approach taken in these specifications is to present a comprehensive series of tests applicable to most industrial and larger commercial systems.
General safety those actions required to maintain a safety at place of worktesting e. This allowed the people doing the inspection to get a closer look at known areas of concern. Commissioning process for new substation equipmenthayes. Testing it is the procedure to reveal particular equipments capability by different types of procedures and suitable arrangements. Inspection and test procedures for electrical power equipment. In order to energize new equipment, the load entity must follow the preparallel inspection process.
Where applicable, testing of circuit breakers generally include. Medium and large power transformers in distribution or transmission power system are often. Over time and conditions of exposure to the elements, what once was a resistancefree connection to earth might degrade, creating areas of potential difference. Design of substation equipment sizing, testing and. Substation equipment, testing, is and iec standards. Putting the substation into operation verifies everything is working correctly. Steps to ensure effective substation grounding part 1 eep. With the grid, fluctuations are common, making it nearly impossible to control critical power parameters such as voltage, current, and load. On equipment electrical testing solution will perform visual, mechanical and electrical tests to ensure troublefree energizing of equipments. The checklists are in pdf format and can be completed electronically or printed and used as hard copy. Industrial tests consulting engineering group leverages the resources of industrial tests extensive library and diverse team of experienced engineers in or call. Td703 revision 6 temporary protective grounds for td. This guide contains strategies and study references to prepare for the test. The substation construction manual is not intended to replace asset management standards, but rather to act as a reference document that crossreferences existing standards and process documentation and plug any gaps where asset management documentation does not exist.
After you verify individual system components, such as controllers and connections, you should test the system as a whole. Equipment electrical and mechanical assets used to generate, transmit and distribute electricity working on which the safety rules apply. The 8501 substation operator knowledge test verbal requires you to answer technical questions that assess specific knowledge required to perform the job. Transformer, throughfault, substation, commission and testing.
886 242 1329 464 140 1523 221 1507 551 1178 1529 551 496 279 686 712 122 1153 1232 1015 35 912 1292 981 224 656 1364 1272