Annual Report 2014/2015 Utilities Commission
Tabled paper 1571
Tabled Papers for 12th Assembly 2012 - 2016; Tabled Papers; ParliamentNT
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37 The technical audit examined the degree to which Power and Water and Territory Generation complied their respective system control, networks and generation licences. The audit was conducted in mid to late 2014. The audit also considered the level of likely compliance immediately prior to the 12 March 2014 System Black incident. The audit found that both Power and Water and Territory Generation were non-compliant with the licence requirement to maintain an adequate compliance process. The Commission understands that Power and Water and Territory Generation have addressed, or are in the process of addressing, the part-compliant and non-compliant issues. System Control The focus of the audit of the system control licence was on key obligations pertaining to maintaining a secure electricity system, including overall governance arrangements, switching procedures and the under frequency load shedding schemes, and those obligations for when a secure system cannot be maintained including black start procedures. The Commission examined 18 obligations contained in the licence and the SCTC. The audit findings are set out in Table 2 Table 2: Summary of system control licence audit findings Item Audit finding Comment Establish and maintain a compliance process. Not compliant Corporate compliance system GRACE currently does not provide granularity required. Lack of Internal Audit. No active internal compliance program for licence obligations or obligations arising from the SCTC. Establishment of operating protocol and arrangements for generation dispatch and to maintain power system security. Part compliant The service level agreement describing the generator dispatch is out of date. Restoration of a power system shall occur as soon as reasonably practical following any interruption within the power system. Compliant Ensuring the accuracy of technical parameters ensuring that the technical parameters of network equipment and system participants equipment comply with the standards set out in the Network Technical Code or as set out in an Access Agreement. Part compliant No specific actions undertaken. Considered a responsibility of Power and Water Networks. Some commissioning tests monitored. Coordinating the plant maintenance program. Part compliant Opportunity to undertake a broad review when annual plans received not done due to resource constraints. The power system security responsibilities of the Power System Controller and System Control. Not compliant Post-trip management is not always optimally performed. No review of Under Frequency Load Shedding scheme. Late submission of preliminary incident reports.